JP4398737B2 - Bicycle hub having automatic transmission mechanism and automatic transmission mechanism - Google Patents

Description

  The present invention relates to an automatic transmission mechanism and a bicycle hub having the automatic transmission mechanism.

  Conventionally, a bicycle using a speed change mechanism is known. As this conventional speed change mechanism, for example, a multi-stage gear wheel provided with a plurality of chain winding gears having different numbers of teeth, a transmission for transferring the chain to each gear, an operation lever for operating the transmission, There is known a device including a wire connecting a transmission and an operation lever. Then, by operating an operation lever attached to a part of the bicycle body, the chain is transferred to another chain winding gear having a different number of teeth in the multi-stage gear wheel via the transmission. As a result, the gear can be changed.

  However, in this case, every time a speed change operation is performed, it is necessary to release the hand from the handle to operate the operation lever, and the speed change operation is troublesome. Further, in addition to the multi-stage gear wheel, a transmission, a lever, and the like are required, and the number of parts increases, so that the assembly process takes time and the cost is increased.

  On the other hand, a bicycle hub is internally provided with a plurality of gear groups, and a single chain winding gear is provided on the hub, a so-called internal hub, an operation portion, and a wire connecting the internal hub and the operation portion. Provisions have also been proposed. This one changes the gear ratio of the gear group by using the hand attached to the part of the bicycle body. As a result, the gear can be changed.

  However, in this case as well as in the previous case, each time a speed change operation is performed, the operation part must be operated by hand, and the speed change operation is troublesome. And the number of parts increases, and the assembling process takes time and costs increase.

The inventor has invented and filed an application for an automatic transmission mechanism that solves such problems. The automatic transmission mechanism includes a transmission body, a drive body that is rotatable with respect to the transmission body, and a coupling unit that couples the drive body and the transmission body so as to be capable of rotational transmission. The connecting means rotates at a rotational speed of the transmission body relative to the first connecting means and the driving body slower than the rotational speed of the transmission body relative to the driving body when the transmitting body and the driving body are connected by the first connecting means. In order to be able to do, it is comprised from the 2nd connection means which connects a transmission body and a drive body. Then, when the pedal of the bicycle is depressed with a certain force or more and a certain amount of rotational force is applied from the driving body to the transmission body connected to the driving body by the first connecting means, the connection by the first connecting means is released, The transmission body can be connected by the second connecting means. Thus, for example, when starting from a stopped state or climbing a hill, simply depressing the pedal of the bicycle with a certain force or more, the drive body and the transmission body are disconnected by the first connection means. The connection can be switched to the connection by the second connection means that rotates slower than the rotational speed of the transmission body with respect to the drive body when connected by the first connection means, and the operation lever need not be operated.
JP 2002-104277 A

  However, in this case, as described above, it is necessary to depress the bicycle pedal with a certain level of force and apply a certain level of rotational force from the driving unit to the transmission unit connected to the driving unit by the first connecting means. For this reason, for example, a person with weak leg strength has a problem that it may be troublesome to remove the connection by the first connection means and switch to the connection by the second connection means.

  The present invention has been made in view of the above circumstances, and has an automatic transmission mechanism and an automatic transmission mechanism that can automatically change gears without manual operation and that can be easily changed even by a person with weak leg strength. The purpose is to provide a bicycle hub.

  This invention solves the said subject by providing the automatic transmission mechanism which has the following characteristics.

According to another aspect of the present invention, there is provided an automatic transmission mechanism that is arranged so as to be able to rotate with respect to an axle upon receiving a driving force, and to be rotatably arranged with respect to the driving body and rotatably supported on the axle. A transmission body for transmitting the rotational force of the driving body to the hub body, a first coupling means for coupling the driving body and the transmission body so as to be capable of rotational transmission, and a rotational speed of the transmission body relative to the driving body driven by the first coupling means. And a second connecting means for connecting the driving body and the transmission body so as to be able to transmit the rotation so that the rotational speed of the transmission body connected to the body is slower than the rotational speed of the driving body. A contacted body held by the holding part, and a contacted body held by the contacted body holding part. The contacted body holding part is accompanied by rotation of the contacted body holding part in the driving direction. The transmission body is configured to rotate in the driving direction, and the contact body holding portion rotates in the driving direction of the driving body. The driving body is configured to rotate in the driving direction. After the driving body has rotated a predetermined amount toward the driving direction side with respect to the abutted body holding portion, the abutting body and the abutted body are brought into contact with each other. The drive body and the transmission body are connected so as to be able to transmit the rotation via the contacted body and the contacted body so that the drive body rotates in the non-driving direction side with respect to the contacted body holding portion. The second driving means connects the driving body and the transmission body in a state in which the connection between the driving body and the transmission body by the first connection means is released. And an automatic transmission mechanism that disables the connection between the drive body and the transmission body in a connected state of the drive body and the transmission body by the first connection means, wherein the automatic transmission mechanism is connected by the second connection means. It can be disabled and maintained in the connected state by the first connecting means, and can be released from maintenance. A first connection maintaining means, with can be maintained in the connected state by the second coupling means and disabling the connection of the first coupling means, are those with at least one second connection maintaining means capable of releasing maintained.

  According to a second aspect of the present invention, the automatic transmission mechanism is in contact until the contacted body according to the automatic transmission mechanism of the first aspect contacts the contacted body stopper provided in the contacted body holding section. The first connecting means is held by the body holding portion so as to be movable in the circumferential direction. The first connecting means is configured to rotate the driving body toward the driving direction side by a predetermined amount with respect to the abutting body holding portion, and And the abutting body and the abutting body stopper are brought into contact with each other, so that the drive body and the transmission body are connected via the abutting abutting body and the abutting body. It connects so that rotation transmission is possible.

According to a third aspect of the present invention, there is provided the automatic transmission mechanism, wherein the contact body according to the automatic transmission mechanism according to the first or second aspect is different from the contacted body when the drive body is rotated in the driving direction side with respect to the contacted body holding portion. The range from the contact position where contact is possible to the position where contact cannot be performed is held by the contact body holding portion so as to be movable in the radial direction. Is detachably locked at a position where it cannot be contacted.

According to a fourth aspect of the present invention, there is provided the automatic transmission mechanism according to any one of the first to third aspects, wherein the contact body is covered when the drive body rotates in the driving direction side with respect to the contacted body holding portion. The range from the contact position where the contact body can be contacted to the fixed position where the drive body and the transmission body can be fixed to each other in a non-rotatable state by contacting the abutted body holding portion can be moved in the radial direction. The first connection maintaining means is held by the contact body holding portion, and the contact body is detachably locked at the fixed position.

According to a fifth aspect of the present invention, there is provided the automatic transmission mechanism according to any one of the first to fourth aspects, wherein the automatic transmission mechanism is transmitted while reducing the rotation from the driving body via the reduction mechanism unit and the reduction mechanism unit. And the first connecting means abuts the abutting body and the abutted body after the driving body rotates by a predetermined amount toward the driving direction with respect to the abutted body holding portion. In addition, the drive body and the transmission body are connected to each other in a non-rotatable state via the contacted body and the contacted body, and the second connecting means is configured to hold the contacted body. The transmission part connecting part and the transmission body are connected when the transmission part connection part is rotated in the driving direction side of the driving body with respect to the drive part. When the body is rotated in the direction opposite to the driving direction, the transmission section connecting portion is rotated when the body is rotated in the direction opposite to the driving direction. The connection part and the transmission body are not connectable.

According to a sixth aspect of the present invention, the automatic transmission mechanism according to any one of the first to fourth aspects transmits the speed increasing mechanism to the transmission body while increasing the rotation speed through the speed increasing mechanism. And a contact portion holding portion configured by a drive portion connection portion, and the first connection means is configured such that the drive body moves toward the driving direction side with respect to the contact portion holding portion. After rotating by a predetermined amount, the contact body and the contacted body are brought into contact with each other, and the drive unit connecting portion and the drive body are mutually connected via the contacted contact body and the contacted body. The second connecting means connects the driving body and the transmission body when the driving body rotates in the driving direction side with respect to the abutted body holding portion, and holds the abutted body. The drive body and the transmission body are disabled from being connected when the drive body is rotated in the counter drive direction side with respect to the portion.

According to a seventh aspect of the present invention, in the automatic transmission mechanism, the contact body according to the automatic transmission mechanism according to any one of the first to sixth aspects contacts an abutment body stopper provided in the abutment body holding portion. The first connecting means is configured to move the driving body to the driving direction side by a predetermined amount with respect to the abutted body holding section, and then the first connecting means is The contact body and the contact body are brought into contact with each other, and the drive body and the transmission body are brought into contact with each other through the contact body and the contacted body. Are connected so as to be able to transmit rotation.

  Moreover, this invention solves the said subject by providing the bicycle hub which has an automatic transmission mechanism which has the following characteristics.

A bicycle hub having an automatic transmission mechanism according to claim 8 includes an axle that is non-rotatably attached to the bicycle, a hub body that is rotatably supported by the axle, and an automatic transmission mechanism. A driving body arranged to receive a driving force and rotate with respect to the axle, a transmission body constituted by a part of the hub main body, and a first connecting the driving body and the transmission body so as to transmit the rotation. The drive body and the transmission body are connected so as to be able to transmit rotation so that the rotation speed of the connection means and the transmission body of the transmission body is slower than the rotation speed of the transmission body connected to the drive body by the first connection means. The first connecting means includes a contacted body held by the abutted body holding portion and a contact body held by the abutting body holding portion. The contact holding unit rotates in the driving direction as the driving body rotates in the driving direction. The contact body holding portion is configured such that the transmission body rotates in the driving direction as the contact body holding portion rotates in the driving direction. After the driving body rotates by a predetermined amount in the driving direction, the contact body and the contacted body are brought into contact with each other, and the drive body is transmitted to the drive body through the contacted body and the contacted body. The body is connected so as to be able to transmit the rotation, and the drive body and the transmission body are disconnected when the drive body is rotated in the counter-drive direction with respect to the abutted body holding portion. The drive body and the transmission body are connected in a state where the connection between the drive body and the transmission body by the first connection means is released, and the drive body and the transmission body are connected in the connection state between the drive body and the transmission body by the first connection means. the bicycle hub having an automatic transmission mechanism for disabling connect the transmission member, the automatic transmission mechanism The connection by the second connection means can be disabled and maintained in the connected state by the first connection means, and the first connection maintaining means which can be released from the maintenance and the connection by the first connection means can be disabled and the connection by the second connection means It is provided with at least one of the 2nd connection maintenance means which can be maintained in a state and can cancel maintenance .

  In the automatic transmission mechanism according to claim 1 of the present application, if the bicycle is run by turning the crank of the bicycle in a state where the driving body and the transmission body are connected by the second connecting means, the second connecting means accompanies the traveling. The driving body connected to the transmission body rotates in the driving direction, and in the rotation, the abutting body and the abutted body are brought into contact with each other, and the driving body is interposed via the abutting body and the abutted body that are in contact with each other. And the transmission body can be coupled so as to transmit rotation. As a result, when the driving body connected to the transmission body by the second connecting means rotates as the bicycle travels, it can be automatically connected by the first connecting means.

  On the other hand, in order to release the connection between the transmission body and the drive body connected by the first connection means, the drive body may be rotated in the opposite direction to the opposite direction to the case where the drive body is connected by the first connection means. Thus, the drive body and the transmission body can be disconnected by the first connection means and connected by the second connection means. Therefore, for example, when the bicycle is started from a stopped state, or when traveling on an uphill, for example, the crank may be rotated in the reverse direction to rotate the driving body in the non-driving direction, thereby transmitting the transmission. It can switch to the connection by the 2nd connection means in which the rotational speed with respect to the drive body of a body becomes slower than the rotation speed with respect to the drive body of the transmission body connected with the drive body by the 1st connection means.

At that time, it is not necessary to apply a certain amount of force to the drive body as in the conventional case, for example, it is only necessary to reverse the crank and rotate the drive body in the non-driving direction side. Can do. Thereby, it can be made practical and easy to use.
Further, in the automatic transmission mechanism according to claim 1 of the present application, the first connection maintaining means capable of disabling the connection by the second connection means and maintaining the connection state by the first connection means and releasing the maintenance, It is assumed that at least one of the second connection maintaining means and the second connection maintaining means capable of releasing the maintenance can be provided while disabling the connection by the first connection means and maintaining the connection state by the second connection means.
By doing so, for example, during normal traveling, the first connection maintaining means is connected to the first connection means to travel, and the maintained state is released only when climbing a steep slope, It is also possible to travel in a connected state by the second connecting means. Or, for example, a person who has strong leg strength and wants to travel in the state of being always connected by the first connection means by the first connection maintaining means at the time of traveling can travel in the state of being connected by the first connection means, A person who is weak in leg power and wants to travel while being connected by the second connection means by the second connection maintaining means at the time of traveling can travel in the state of being connected by the second connection means. Therefore, various ways of riding can be performed according to the place where the vehicle travels or depending on the person who rides, making it convenient to use.

  In the automatic transmission mechanism according to claim 2 of the present application, the abutted body is held by the abutted body holding portion so as to be movable in the circumferential direction, and the first connecting means is configured to rotate the driving body in the driving direction side. Abutting the abutting body and the abutted body, and abutting the abutted body and the abutting body stopper to connect the driving body and the transmission body so as to be able to transmit the rotation. To do.

  For example, when the abutted body 26 shown in FIG. 3 is fixed to the connecting cylinder member 23 for transmitting portion as the abutting body holding portion in the transmitting portion 2, the driving body 30 is rotated in the clockwise direction in the driving direction. When the driving body 30 rotates at most about one rotation relative to the transmission connecting cylinder member 23, the contact body 33 comes into contact with the contacted body 26 (from the state shown in FIG. 3 to the state shown in FIG. 7A). 30 and the transmission connecting cylinder member 23 are connected so as to be able to transmit rotation. Therefore, for example, the travel distance in the state of being connected by the second connecting means from the start of traveling by being connected by the second connecting means to the connecting by the first connecting means is shortened. As a result, when starting or traveling on an uphill, the vehicle is switched to the connection by the first connecting means in a state where the vehicle does not sufficiently travel, and there is a possibility that the vehicle may not be able to travel smoothly on the start or on the uphill.

  However, if the abutted body 26 is held by the abutted body holding portion so as to be movable in the circumferential direction as in the present invention, for example, when the driving body 30 is rotated in the clockwise direction, for example, the abutting body In the state shown in FIG. 7A in which 33 is in contact with the contacted body 26, the contacted body 26 can move relative to the transmission connecting cylinder member 23 as the contacted body holding portion. As shown in FIG. 8, the contacted body 26 is not held connected to the transmission portion connecting cylinder member 23, and the contacted body 26 receives and holds the contacted body as shown in FIG. When the contacted body 26 stops moving with respect to the transmitting portion connecting cylinder member 23 by abutting against the contacted body stopping portion 27b formed in the portion 27, the driving body 30 and the transmitting portion connecting cylinder member 23 are connected. Connect to transmit rotation. Therefore, the drive body 30 and the transmission body 20 can be connected so as to be able to transmit rotation after the drive body 30 is rotated by one or more rotations with respect to the transmission connecting cylinder member 23 that rotates together with the transmission body 20, and the second connection means The travel distance in the connected state can be increased. Therefore, when traveling on an uphill or at the start, it is possible to switch to the connection by the first connecting means after sufficiently traveling, so that the start or the uphill can be smoothly driven by the connection by the second connecting means. Can be adjusted.

In the automatic transmission mechanism according to the third aspect , the contact body cannot be contacted from a contact position where the contact body can contact the contacted body when the drive body is rotated relative to the contacted body holding portion. The second connection maintaining means is detachably locked to the non-contact position so that the range can be moved in the radial direction up to the non-contact position. Shall.

  By doing so, the second connection maintaining means can be easily formed.

5. The automatic transmission mechanism according to claim 4 , wherein the contact body is moved from a contact position where the contact body can come into contact with the contact body when the drive body is rotated relative to the contact body holding portion in the driving direction. It is held by the abutment body holding portion so as to be movable in the radial direction within a range up to a fixed position where the drive body and the transmission body can be fixed to each other in a non-rotatable state by contacting the holding portion. The maintaining means shall detachably engage the contact body at the fixed position.

  By doing so, the first connection maintaining means can be easily formed.

In the automatic transmission mechanism according to claim 5 of the present application, since the driving body and the transmission body are in a non-rotatable state when the transmission body and the driving body are connected by the first connecting means, the transmission body is connected to the driving body. The drive part coupling part rotates at a speed lower than the rotational speed of the drive body by the speed reduction mechanism part. Therefore, for example, as illustrated in FIG. 9, the transmission body 20 rotates faster than the drive unit connection unit 51, and as a result, the drive unit connection unit 51 is counterclockwise relative to the transmission unit 20. Therefore, the transmission body 20 and the driving body 30 are not connected by the second connecting means. On the other hand, in the state where the transmission body and the drive body are disconnected by the first connection means, the transmission body is not transmitted from the drive body via the first connection means. As shown in FIG. 4, the transmission body rotates in the clockwise driving direction side, and the transmission body and the driving body can be connected by the second engagement means. Thereby, the drive body and the transmission body can be selectively connected by the first connection means and the second connection means.

  Further, in the state of being connected by the second connecting means, the drive portion connecting portion is rotated slower than the rotational speed of the driving body by the speed reduction mechanism portion, so that the transmission body connected to the driving portion connecting portion is Rotates slower than the rotation speed. As a result, the transmission body can be rotated with a smaller force than when the transmission body is rotated at the same rotational speed as that of the driving body, and the vehicle can be more easily traveled at the start or uphill.

In the automatic transmission mechanism according to claim 6 of the present application, in the state of being connected by the first connecting means, the transmission body rotates faster than the rotational speed of the transmission portion connection portion by the speed increasing mechanism portion. It rotates faster than the rotational speed of the driving body connected to the connecting portion. As a result, the transmission body can be rotated faster than when the transmission body rotates at the same rotational speed as that of the driving body. For example, when the transmission body starts and reaches a certain speed, the transmission body can be more easily traveled.

In the automatic transmission mechanism according to claim 7 of the present application, the first connecting means abuts the abutting body and the abutted body when the driving body rotates, and the abutting body and the abutting body stopping portion. And the drive body and the transmission body are connected to each other via the contact body and the contacted body so as to be able to transmit the rotation.

  By doing so, the driver body is rotated one or more times with respect to the transmission body after the driver body is moved to the abutted body holding portion as in the case where the contact body according to claim 2 can be moved to the contacted body holding portion. And the transmission body can be connected so as to be able to transmit rotation, and the travel distance in a state where they are connected by the second connecting means can be increased. In addition, if the abutted body is movable with respect to the abutted body holding portion and the abutting body is movable with respect to the abutting body holding portion, then the second connection means can be used for the first connection. The travel distance in the state connected by the second connection means until the connection by the first connection means can be further increased, and the travel distance in the state connected by the second connection means can be freely adjusted.

In the bicycle hub having the automatic transmission mechanism according to claim 8 of the present application, the transmission body of the automatic transmission mechanism can be used as a part of the hub main body, compared with the case where the hub main body and the automatic transmission mechanism are separately formed. Thus, the number of parts can be reduced and a bicycle hub equipped with an automatic transmission mechanism can be manufactured at a low cost.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional explanatory view of a part of a bicycle hub having an automatic transmission mechanism according to a first embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional explanatory view of a main part of the automatic transmission mechanism of FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2, FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is an enlarged sectional view taken along line VV in FIG. FIG.

  As shown in FIG. 1, the bicycle hub having the automatic transmission mechanism according to the first embodiment includes a hub body 100, an axle 110 as a hub shaft that rotatably supports the hub body 100, and the automatic transmission mechanism 1. ing.

  The hub main body 100 includes a hub body 101, and a left brim part 102 and a right brim part 103 fixed to both the left and right sides of the hub body 101. In this embodiment, the hub body 101 includes a cylindrical body core portion 101a and a synthetic resin covering member 101b that covers the outer peripheral side of the body core portion 101a.

  The left brim part 102 and the right brim part 103 include plate-like brim bodies 102d and 103d, respectively. Spoke insertion holes 102a and 103a are formed in the flanges 102d and 103d over the entire circumference, and spokes (not shown) can be passed through the spoke insertion holes 102a and 103a. ing.

  In addition, each collar portion 102, 103 is provided with hub one fitting insertion portion 102b, 103b. And hub one 105,105 is inserted by these hub one insertion insertion parts 102b and 103b. The hub ones 105 and 105 are fixed to the left and right ends of the body core portion 101 a of the hub body 101, respectively, so that the flange portions 102 and 103 are fixed to the hub body 101.

  The hub body 100 configured as described above has an axle 110 penetrating from the left end side to the right end side of the hub barrel 101, and left and right hub ones 105, 105 fixed to the hub barrel 101, and the hub ones 105, 105. Are rotatably supported on the axle 110 via a plurality of steel balls 106. The hub body 100 supported by the axle 110 is connected to the spoke insertion holes 102a and 103a of the flange portions 102 and 103 through spokes and the nuts 108 and 108 etc. screwed to the axle 110 after the spokes are assembled. Can be attached to the body of the bicycle.

  As shown in FIG. 2, the automatic transmission mechanism 1 includes a drive unit 3 having a drive body 30 that is rotatably arranged with respect to an axle 110, and a transmission body 20 that is rotatably arranged with respect to the drive body 30. And a connecting means for connecting the driving body 30 and the transmitting body 20 to each other.

  As shown in FIGS. 2 and 3, the transmission portion 2 includes a transmission body 20 and a cylindrical transmission cylinder connecting cylinder member 23 that is rotatably arranged on the outer periphery of the transmission body 20.

  The transmission body 20 is formed of a cylindrical shape that is molded so as to integrally protrude from the right collar portion 103 to the right side. Therefore, when the transmission body 20 makes one revolution, the hub body 100 makes one revolution and the tire also makes one revolution. The transmitting body 20 includes a small-diameter portion 22 formed at the right end portion and a large-diameter portion 21 formed on the left side of the small-diameter portion 22 and having an outer diameter larger than that of the small-diameter portion 22. I have.

  The inner peripheral portion of the large diameter portion 21 also serves as the hub one fitting insertion portion 103b of the right collar portion 103 described above, and the hub one 105 of the hub main body 100 is pushed into the inner peripheral side so that the hub one 105 cannot rotate. It is attached. Thereby, the transmission body 20 is fixed to the hub body 100. Further, when the transmission body 20 is attached to the hub one 105, the right collar portion 103 is assembled at a predetermined position.

  3, a plurality of first ratchet teeth 21a... 21a formed on the outer peripheral portion of the large diameter portion 21 so as to face the counterclockwise direction in FIG. Is formed.

  As shown in FIG. 4, a plurality of second ratchet teeth 25 a... 25 a provided over the entire circumference are provided on the inner peripheral portion of the small diameter portion 22 of the transmission body 20. Each of these second ratchet teeth 25a... 25a is formed to face the counterclockwise direction in FIG.

  The transmission connecting cylinder member 23 is for transmitting the rotational force of the drive unit 3 accompanying the rotation of the drive body 30 in the clockwise direction to the transmission body 20. Further, the transmission connecting cylinder member 23 of this embodiment constitutes a contacted body holding portion that holds a contacted body 26 described later. As shown in FIG. 2, the transmission connecting cylinder member 23 includes a flange 23a and a cylindrical portion 23b having an outer diameter smaller than that of the flange 23a.

  Further, the cylindrical portion 23b includes a contacted body receiving portion 27 that receives and holds the contacted body 26 so as to be movable. As shown in FIG. 3, the abutting member receiving / holding portion 27 is formed on the outer periphery of the cylindrical portion 23 b with a predetermined depth and a predetermined length in the circumferential direction.

  Two first ratchet claws 23g and 23g that are detachably engaged with the first ratchet teeth 21a ... 21a of the transmission body 20 are attached to the inner circumference of the transmission connecting cylinder member 23.

  Each of these first ratchet claws 23g, 23g is provided with a cylindrical shaft portion 23c on the proximal end side and a claw portion 23d on the distal end side. And the shaft part 23c of each 1st ratchet nail | claw 23g, 23g is rotatably accommodated in each 1st ratchet nail | claw receiving part 23e, 23e provided in the connection cylinder member 23 for transmission parts. Each of the first ratchet claws 23g, 23g accommodated is a ring-shaped member mounted on the inner periphery of the transmission connecting cylinder member 23 in a spring fitting groove (not shown) provided in the first ratchet claw 23g. By passing the ring spring 23f, the shaft portions 23c, 23c of the first ratchet claws 23g, 23g are pressed, and the claw portion 23d is always pressed against the first ratchet teeth 21a of the transmitting body 20 in the radial direction. .., 21a, and the first ratchet pawls 23g, 23g and the first ratchet teeth 21a... 21a can be engaged with each other.

  The first ratchet pawls 23g and 23g are engaged with the first ratchet teeth 21a to 21a of the transmission body 20 as the transmission connecting cylinder member 23 rotates clockwise with respect to the transmission body 20. Then, the transmission body 20 rotates in the same direction together with the transmission portion connecting cylinder member 23. On the other hand, the first ratchet pawls 23g, 23g slide on the first ratchet teeth 21a ... 21a when the transmission portion connecting cylinder member 23 is rotated counterclockwise to the counter driving direction. Only the connecting cylinder member 23 for transmission part rotates without being able to match.

  As shown in FIG. 2, the drive unit 3 includes a drive body 30 and a speed reduction device 6.

  The drive body 30 includes a gear attachment portion 31 for attaching the chain winding gear 32a on the outer peripheral side on the right end side. When a chain (not shown) provided on the bicycle is wound around the chain winding gear 32 a attached to the gear attachment portion 31 and receives a driving force from the chain, the driving body 30 is attached to the axle 110. On the other hand, it rotates clockwise in FIGS.

  The gear mounting portion 31 in the present embodiment is provided with a plurality of gear fitting insertion grooves 31a... 31a formed in the axial direction and one retaining ring fitting groove 31b formed in the circumferential direction. . Then, after a projection (not shown) provided on the inner periphery of the chain winding gear 32a is fitted into the gear fitting groove 31a ... 31a, the retaining ring 32b is fitted into the retaining ring fitting groove 31b. Put in. As a result, the chain winding gear 32a can be attached to the gear attachment portion 31 in a non-rotatable manner. The chain winding gear 32a is not limited to a form that can be removably attached to the drive body 30, but is formed integrally with the drive body 30 and is attached to the drive body 30 so as not to be removable. Also good.

  On the inner periphery on the left base end side of the drive body 30, there is provided a storage portion 34 for rotatably storing the transmission portion connecting cylinder member 23 of the transmission portion 2.

  The speed reduction device 6 includes a left transmission portion connection portion 50 connected to the transmission portion 2 and a right reduction mechanism portion 53 connected to the driving body 30.

  As shown in FIG. 4, the transmission portion connecting portion 50 has two second ratchet claws 52 and 52 attached to the outer periphery. Each of these second ratchet claws 52, 52 is provided with a cylindrical shaft portion 52a on the proximal end side and a claw portion 52b on the distal end side, like the first ratchet claw 23g. And each 2nd ratchet nail | claw 52,52a supports the axial part 52a rotatably to the 2nd ratchet nail | claw receiving part 51a, 51a formed so that it might be depressed in the outer periphery of the connection part 50 for transmission parts. Are stored. Further, the second ratchet pawl 52 is urged by a ring spring 61 mounted on the transmission portion connecting portion 50, so that the pawl portion 52 b is always a second ratchet tooth on the radially outer side of the transmission portion connecting portion 50. 25a... Protrudes to the 25a side.

  The speed reduction mechanism portion 53 is for connecting the drive body 30 and the transmission portion connection portion 50 to transmit the rotation of the drive body 30 to the transmission portion connection portion 50 while reducing the speed. As shown in FIGS. 2 and 5, the speed reduction mechanism 53 of the present embodiment includes a plurality of planetary gears 53a... 53a and a support member 53b that supports these planetary gears 53a. . In this embodiment, the planetary gears 53a... 53a are composed of four.

  The support member 53b includes two disk-shaped support plate portions 53c and 53c that are spaced apart by a predetermined distance in the left-right direction, and the planetary gears 53a. And rotatably supported by support shafts 53e... 53e. Further, the left support plate portion 53c of the support member 53b and the transmission portion connection portion 50 are connected so as not to rotate, so that the transmission portion connection portion 50 rotates together with the support member 53b. In the present embodiment, the left support plate portion 53c and the transmission portion connection portion 50 in the support member 53b are integrally formed, so that the transmission portion connection portion 50 and the support member 53b rotate together. ing.

  The planetary gears 53a... 53a of the speed reduction mechanism 53 configured as described above are meshed with the inner gear 35 formed on the inner periphery on the front end side of the driving body 30 and fixed to the axle 110. It meshes with the sun gear 110a provided, and rotates around the inner gear 35 and the sun gear 110a while rotating as the driving body 30 rotates.

  Further, as the planetary gears 53a... 53a go around the inner gear 35 and the sun gear 110a, the support member 53b rotates together with the planetary gears 53a ... 53a, and as the support member 53b rotates. Then, the transmission portion connecting portion 50 rotates together with the support member 53b. Further, the planetary gears 53a... 53a, the inner gear 35, and the sun gear 110a in the present embodiment, when the drive unit 3 is rotated once with the sun gear 110a fixed in a non-rotatable state, are supported by the support member 32b and the transmission unit. The number of teeth is set so that the connecting portion 50 rotates 0.75 times. Note that the rotation ratio of the transmission portion connecting portion 50 to the drive body 30 can be changed by changing the number of teeth of the planetary gears 53a... 53a, the inner gear 35, and the sun gear 110a, and can be changed as appropriate.

  The drive body 30 of the drive unit 3 configured as described above is arranged on the outer peripheral side of the transmission body 20 of the transmission unit 2, and from the inside to the transmission body 20 via the plurality of steel balls 7 a and the presser lid 7 b. It is rotatably supported. Further, in this state, the transmission portion connecting cylinder member 23 of the transmission portion 2 is housed in the housing portion 34 of the driving body 30 and is prevented from being detached from the housing portion 34 by a retaining member 38. Further, in this state, the first ratchet claws 23g, 23g of the transmission portion connecting cylinder member 23 are arranged on the outer peripheral side of the first ratchet teeth 21a ... 21a of the transmission body 20, and the first ratchet claws 23g, 23g And the first ratchet teeth 21a... 21a can be engaged with each other.

  In addition, a moving space 39 is defined between the inner periphery of the storage portion 34 of the drive body 30 assembled in this way and the outer periphery of the cylindrical portion 23b of the transmission connecting tube member 23.

  Next, the connecting means will be described. The connecting means is composed of two parts, a first connecting means and a second connecting means. The first connecting means includes a contact body 33 held by the drive unit 3 and a contacted body 26 held by the transmission unit 2 and contacting the contact body 33.

  In this first embodiment, the contact body 33 is held by the drive body 30 so as not to move. More specifically, as shown in FIG. 3, the abutting body 33 protrudes integrally from the driving body 30 on the inner side in the radial direction from the inner peripheral surface of the driving body 30 where the storage portion 34 is formed. Therefore, in this embodiment, the contact body holding portion 30 a that holds the contact body 33 is constituted by a part of the drive body 30.

  When the drive unit 3 and the transmission unit 2 are assembled, the contact body 33 is arranged in the moving space unit 39 and moves in the moving space unit 39 as the driving body 30 rotates.

  In this first embodiment, the abutted body 26 is composed of a steel ball. The abutted body 26 is received by the abutted body receiving holding portion 27 of the transmission connecting tube member 23 and formed at the first end of the abutted body receiving portion 27 on the counterclockwise side. The second contact formed on the second end of the abutting member receiving / holding portion 27 in the clockwise direction from the position shown in FIG. 3 in contact with the first abutting body stopper 27a. The range up to the position shown in FIG. 8 in contact with the contact stop portion 27b is movable.

  Further, the abutted body 26 protrudes from the abutted body receiving / holding portion 27 into the moving space 39 in a state of being received by the abutted body receiving / holding portion 27.

  As shown in FIG. 8, the abutted body 26 abuts on the abutting body 33 that moves in the moving space portion 39 when the driving body 30 is rotated in the clockwise direction by the driving force, and is connected to the transmission portion connection. By contacting the second abutted body stopper 27b of the abutted body receiving / holding portion 27 of the cylinder member 23, the transmission body connecting cylinder member 23 and the transmission body 20 of the transmission body 2 and the transmission section 2 are contacted. Are connected to each other in a non-rotatable state. Therefore, in the first embodiment, when the driving body 30 of the driving unit 3 makes one rotation by the connection by the first connecting means, the transmission cylinder 20 and the transmission body 20 of the transmission unit 2 make one rotation.

  On the other hand, when the drive unit 3 is rotated counterclockwise with respect to the axle 110, the contact body 33 and the contacted body 26 are in contact with each other, or the contacted body 26 and the transmission portion connecting cylinder member 23 are covered. The contact between the receiving body receiving and holding portion 27 and the second contacted body stopping portion 27b is released, and the connection between the driving body 30 and the transmitting portion 2 is released.

  The second connecting means includes second ratchet pawls 52 and 52 attached to the transmission portion connecting portion 50 of the speed reducer 6 in the driving portion 3 and second ratchet teeth formed on the small diameter portion 22 of the transmission body 20. 25a ... 25a. The second ratchet pawls 52 and 52 and the second ratchet teeth 25a... 25a, as shown in FIGS. The small diameter portion 22 of the transmission portion 20 is connected when the transmission portion connecting portion 50 rotates in the clockwise direction with respect to the transmission portion 2, and the counterclockwise direction side of the transmission portion connecting portion 50 with respect to the small diameter portion 22 of the transmission body 20 When rotating to the position, it is impossible to connect.

  In addition, when the driving body 30 makes one rotation in the connected state by the second connecting means, the transmission mechanism connecting portion 50 is rotated 0.75 by the speed reduction mechanism 53, and the transmission body 20 of the transmitting portion 2 connected thereto is 0. Rotate 75 times.

  Next, the operation of the bicycle hub having the automatic transmission mechanism 1 of the present embodiment configured as described above will be described. The abutted body 26 abuts on the abutting body 33 and abuts on the first abutted body stop portion 27a of the abutted body receiving / holding portion 27 of the transmission connecting tube member 23. The state shown in FIG. 3 will be described.

  First, get on the bicycle and step on the pedal to turn the crank. As a result, the driving body 30 receives a driving force through the chain and the chain winding gear 32a, and the driving body 30 is applied with the clockwise rotational force in FIGS. When the driving body 30 is rotated in the clockwise direction by the rotational force, the transmission connecting portion 50 is driven in the clockwise direction as shown in FIG. 4 via the planetary gears 53a... 53a and the support member 53b. The body 30 rotates at a rate of 0.75 rotation during one rotation.

  During the rotation, the second ratchet claws 52, 52 and the second ratchet teeth 25a ... 25a are engaged. As a result, the drive body 30 and the transmission body 20 are connected by the second connection means via the transmission portion connection section 50 of the speed reducer 6, and the transmission body 20 is accompanied by the clockwise rotation of the drive body 30. Thus, the drive body 30 rotates 0.75 while making one rotation.

  On the other hand, when the driving body 30 is rotated in the clockwise direction, the abutted body 26 is positioned on the counterclockwise side of the abutting body 33 as shown in FIG. Since the driving body 30 connected to the transmission unit 2 rotates faster than the transmission unit 2, the driving body 30 rotates with respect to the transmission cylindrical tube member 23 of the transmission unit 2 as shown in FIG. 6A. Therefore, in this state, the transmission body 20 and the driving body 30 are not connected by the first connecting means, and are maintained in a state of being connected by the second connecting means.

  The abutted body 26 can move the abutted body receiving / holding portion 27 of the connecting cylinder member 23 for transmission as the drive body 30 rotates. In FIG. It is expressed as being maintained at a position in contact with the second abutting body stopper 27b of the transmission portion connecting cylinder member 23. The same applies to the following FIG. 6B, FIG. 7A, and FIG. 7B. Further, as the driving body 30 rotates in the clockwise direction, the transmission body 20 connected to the driving body 30 by the second connecting means also rotates in the same direction, but FIGS. 6A, 6B, 7A, 7B, And in FIG. 8, only the drive body 30 is rotated and represented.

  Further, when the driving body 30 rotates in the clockwise direction, the contact body 33 moves the moving space portion 39 as shown in FIG. 6B while maintaining the state where the driving body 30 and the transmission body 20 are connected by the second connecting means. As shown in FIG. 7A, the contact body 33 contacts the contacted body 26.

  Due to this contact, the contacted body 26 is pressed clockwise. At that time, since the abutted body 26 is in a state in which the abutted body receiving / holding portion 27 of the transmitting portion connecting cylinder member 23 is movable in the clockwise direction, as shown in FIG. Move with. Therefore, in this state, the connection by the first connecting means is not yet performed, and the driving body 30 rotates with respect to the transmission portion connecting cylinder member 23 of the transmission portion 2.

  Further, when the driving body 30 rotates clockwise, as shown in FIG. 8, the abutted body 26 contacts the second abutting body stopper 27b of the abutting body receiving holding portion 27. Touch. In this state, the abutted body 26 cannot move with respect to the transmission-portion connecting cylinder member 23, and the drive body 30 and the transmission-portion connecting cylinder member 23 become non-rotatable. A clockwise rotational force is transmitted to the drive unit 30 from the drive unit 30.

  Further, when a clockwise rotational force is applied to the transmission connecting cylinder member 23, the first ratchet pawls 23g, 23g and the first ratchet pawls 23g, 23g are engaged via the first ratchet teeth 21a ... 21a. The transmission body 20 rotates at the same rotational speed as the drive body 30.

  When the driving body 30 and the transmission body 20 are connected by the first connection means, as shown in FIG. 9, the transmission body 20 rotates in the clockwise direction faster than the transmission part connection part 50, and the transmission part connection part 50 is Then, it rotates counterclockwise with respect to the transmission body 20. As a result, the second ratchet pawl 52 and the second ratchet teeth 25a... 25a of the transmission portion 2 cannot be engaged, and the drive body 30 and the transmission body 20 cannot be connected by the second connection means.

  As described above, at the start when the bicycle is started from the stop state, in this embodiment, the abutted body 26 abuts on the abutting body 33 and the transmitting unit connecting cylinder member 23 is used for the abutted body. The abutted body 26 abuts against the abutting body 33 from the state of FIG. 3 that abuts against the first abutted body stopper 27 a of the receiving holding portion 27, and the abutting portion of the transmission connecting cylinder member 23 The driving body 30 is rotated five times and the transmission body 20 is about 3.75 until the state shown in FIG. 8 is brought into contact with the second contacted body stopper 27b of the contact receiving holding part 27. When the driving body 30 and the transmission body 20 are connected by the second connecting means while the tire rotates (about 3.75 rotations), and the rotational speed of the transmission body 20 with respect to the driving body 30 is connected by the first connecting means. The transmission body 20 can run at a speed lower than the rotational speed of the transmission body 20 with respect to the drive body 30, and the first It can be run in less force than when linked by binding means. On the other hand, after the tire has rotated about 3.75 from the start, it is connected by the first connecting means, and the rotational speed of the transmitting body 20 with respect to the driving body 30 is connected by the second connecting means. The vehicle can travel at a speed faster than the rotational speed relative to the drive body 30, and can travel faster than the case where it is connected by the second connecting means.

  When releasing the connection by the first connecting means during traveling, the pedal that is being depressed is stopped and the rotation of the crank is stopped. Accordingly, the rotation of the driving body 30 with respect to the axle 110 is stopped via the chain and the chain winding gear 32a. At that time, the transmission body 20 rotates in the clockwise direction, and the transmission portion connecting cylinder member 23 of the transmission portion 2 has the first ratchet claws 23g, 23g pressed against the transmission body 20 by the ring spring 23f, When the transmission body 20 rotates, it rotates together. As a result, the driving body 30 rotates in the counterclockwise direction relative to the transmission body 20 and the transmission portion connecting cylinder member 23, and the contact between the contact body 33 and the contacted body 26 is released, or Then, the contact between the abutted body 26 and the second abutted body stop portion 27b of the abutted body receiving / holding portion 27 of the transmitting portion connecting cylinder member 23 is released.

  As a result, the connection between the drive body 30 and the transmission body 20 connected by the first connection means is released, and when the pedal is depressed again from this state, the transmission body 20 and the drive body 30 are connected by the second connection means. The vehicle can travel in a state of being made to travel, and can travel with a smaller force than when connected by the first connecting means. Therefore, for example, when an uphill is reached, the pedal is stopped immediately before that, and the transmission unit 2 and the drive unit 3 are connected by the second connecting means, so that the uphill can be easily climbed.

  Further, when the vehicle 30 travels while the pedal is stopped and the drive body 30 rotates in the counterclockwise direction relative to the transmission body 20 and the transmission connecting portion connecting cylinder member 23, as shown in FIG. And the abutted body 26 abut against the abutted body 26 and the first abutted body stop portion 27a of the abutted body receiving and holding portion 27 of the transmission connecting tube member 23. It will be in the state.

  In this embodiment, the abutting body 26 in which the connecting cylinder member 23 for transmitting portion abuts on the second abutting body stopper 27b of the abutting body receiving and holding part 27 and the abutting body thereof. The first ratchet claws 23g, 23g are moved by the urging force of the ring spring 23f so that the transmission connecting cylinder member 23 can rotate together with the rotation of the transmission body 20 unless pressed by the contact body 33 in contact with the body 26. It is pressed against the transmission body 20. By doing so, the driving body 30 can be reliably rotated counterclockwise relative to the transmission body 20 and the transmission connecting cylinder member 23, and the connection by the first connection means can be released. In addition, the contact body 33 and the contacted body 26 are reliably in contact with each other, and the contacted body 26 and the first contacted portion of the contacted body receiving and holding portion 27 of the transmission connecting tube member 23 are provided. The state shown in FIG. 3 can be brought into contact with the body stopper 27a, and the maximum state in which the transmission body 20 can rotate in the state of being connected by the second connecting means when being connected again by the first connecting means. (3, 75 revolutions in this embodiment).

  When the vehicle further travels from the state shown in FIG. 3 with the pedals stopped, the transmission connecting cylinder member 23 of the transmission unit 2 is held by the contact body 33 and the contacted body 26 and the contacted body receiving holding. It is pressed counterclockwise via the first abutting body stopper 27a of the portion 27. As a result, the first ratchet claws 23g, 23g pressed against the transmission body 20 slide, and the drive body 30 and the transmission portion connecting cylinder member 23 rotate relative to the transmission body 20 in the counterclockwise direction.

  In addition, at the start, when the first connecting means is used for connection, the pedal is operated to rotate the crank in the reverse direction to the above traveling. Thereby, the connection by the first connecting means can be released in the same manner as in the case where the pedal is stopped and the rotation of the crank is stopped during the above-described traveling. Thereby, it can drive | work in the state connected by the 2nd connection means at the time of a start, and can start drive | work with a smaller force than the case where it connects by the 1st connection means.

  As described above, when the vehicle is running, the pedal is stopped to stop the rotation of the crank. When the vehicle is stopped, the crank may be rotated counterclockwise. Accordingly, the driving body 30 can be rotated in the counterclockwise counter driving direction with respect to the transmission connecting cylinder member 23, and the connection by the first connecting means can be released. Therefore, it is not necessary to perform a shifting operation by hand or to depress the pedal with a force exceeding a certain level as in the prior art, and even a person with weak leg power can easily shift.

  In the first embodiment, the abutted body 26 is movably held by the transmitting portion connecting cylinder member 23 as the abutted body holding portion, and the abutting body 33 is used as the abutting body holding portion. Although it is assumed that a part of the drive body 30 is held immovably, the present invention is not limited to this configuration and can be changed as appropriate. For example, the abutting body 26 is held by the transmission connecting cylinder member 23 so as not to move, and the abutting body 33 is held movably by the driving body 30. Alternatively, the abutted body 26 is held by the transmission connecting cylinder member 23 so as not to move, and the abutting body 33 is held immovably by the driving body 30.

  Further, the abutted body 26 may be movably held by the transmission connecting cylinder member 23, and the abutting body 33 may be movably held by the driving body 30. Specifically, for example, as shown in FIG. 10, the contact body 33 is configured as a separate body from the drive body 30, and as a contact body receiving and holding portion provided in the drive body 30 along the circumferential direction. The abutting body 33 is received and held in the circumferential groove 36, and the abutting body 33 abuts on the abutting body stoppers 36a, 36a formed at the end of the circumferential groove 36 until the movement is stopped. The body receiving holder is movable.

  Next, 2nd Embodiment of this invention is described based on FIGS. 11-14.

  The automatic transmission mechanism 200 of the second embodiment is implemented as a bicycle hub having the automatic transmission mechanism 200 as in the first embodiment. As shown in FIG. 11, the bicycle hub having the automatic transmission mechanism 200 includes a hub main body 100, an axle 110 that rotatably supports the hub main body 100, and an automatic transmission mechanism 200.

  The hub body 100 includes a hub body 101, a left brim part 102, and a right brim part 103. In the second embodiment, the hub body 101 is configured only by the one corresponding to the body core portion 101a of the first embodiment.

  The left brim part 102 has the same configuration as that of the first embodiment, but the right brim part 103 is constituted by a transmission part 202 and a drive part 203 of an automatic transmission mechanism 200 described later.

  As in the first embodiment, the automatic speed change mechanism 200 includes a drive unit 203, a transmission unit 202, and a connecting means as shown in FIG.

  The transmission part 202 of 2nd Embodiment is provided with the transmission body 220 and the speed increasing apparatus 210 as shown in FIG. 11, FIG.

  The transmission body 220 is formed of a cylindrical shape, and includes a brim body 103e having a spoke insertion hole 103a on the outer periphery of the right end portion. Further, the left end side of the transmission body 220 is fixed to the hub barrel 101.

  A plurality of second ratchet teeth 225a... 225a provided over the entire circumference are provided in the substantially right and left central portion of the inner circumference of the transmission body 220. Each of these second ratchet teeth 225a... 225a is formed to face the counterclockwise direction in FIG.

  As shown in FIG. 11, the speed increasing device 210 includes a drive portion connecting portion 250 formed of a right cylindrical body connected to the drive portion 203 and a left speed increasing mechanism portion 253 connected to the transmission body 220. ing.

  The speed increasing mechanism portion 253 connects the transmission body 220 and the drive portion connecting portion 250 and transmits the rotation of the drive portion connecting portion 250 to the transmission body 220 while increasing the speed. The speed increasing mechanism 253 of this embodiment includes four planetary gears 253a... 253a and a support member 253b (shown in FIG. 11) that supports these planetary gears 253a. It has.

  The support member 253b includes two disk-like support plate portions 253c and 253c that are spaced apart by a predetermined distance in the left-right direction, and the planetary gears 253a. And rotatably supported through support shafts 253e... 253e. In addition, the right support plate portion 253c and the drive portion connecting portion 250 in the support member 253b are integrally formed so that the drive portion connecting portion 250 and the support member 253b rotate together. .

  And each planetary gear 253a ... 253a of the speed increasing mechanism part 253 comprised in this way is the inner gear 235 formed in the left part of the 2nd ratchet teeth 225a ... 225a in the inner periphery of the transmission body 220. FIG. , And the planetary gears 253a... 253a are rotated while the sun gear 110a is rotated. While circling, the inner gear 235 is circulated. Then, when the inner gear 235 goes around, the transmission body 220 rotates.

  Each planetary gear 253a... 253a, inner gear 235, and sun gear 110a in the second embodiment is configured such that the transmission body 220 is rotated when the drive portion connecting portion 250 makes one rotation while the sun gear 110a is fixed in a non-rotatable state. The number of teeth is set to rotate about 1.33. Note that the rotation ratio between the driving unit connecting portion 250 and the transmission body 220 can be changed by changing the number of teeth of the planetary gears 253a... 253a, the inner gear 235, and the sun gear 110a, and can be changed as appropriate. .

  The drive part 203 of 2nd Embodiment is provided with the cylindrical drive body 230 and the connection cylinder body 223 for drive parts.

  As shown in FIG. 11, the driving body 230 includes a gear attachment portion 31 for attaching the chain winding gear 32 a to the outer periphery on the right end side. The gear mounting portion 31 has the same configuration as that of the first embodiment.

  In addition, a steel ball receiving portion 303 is provided on the inner periphery on the right side of the driving body 230, and a plurality of steel balls 106... 106 and ball presses 107, 107 are provided on the steel ball receiving portion 303 so as to be able to roll. Etc., and is rotatably supported by the axle 110. Therefore, the driving body 230 of the second embodiment also serves as a hub one.

  Two second ratchet claws 252 and 252 that are detachably engaged with the second ratchet teeth 225 a to 225 a of the transmission body 220 are attached to the outer periphery on the left side of the drive body 230. These second ratchet claws 252 and 252 have the same configuration as the second ratchet claws 52 and 52 of the first embodiment.

  In addition, two first ratchet claws 223g and 223g are provided on the inner periphery on the left side of the driving body 230. These first ratchet claws 223g and 223g have the same configuration as the first ratchet claws 23g and 23g of the first embodiment.

  As shown in FIG. 11, the drive body 230 configured in this way is inserted at the proximal end side on the inner peripheral side of the distal end side of the transmission body 220, and as described above, the steel balls 106. , 107 and the like, are rotatably supported on the axle 110, and the transmission body 220 is rotatably supported via steel balls 109 ... 109. In this state, the second ratchet teeth 225a... 225a of the transmission body 220 and the second ratchet claws 252 and 252 of the drive body 230 can be engaged.

  The connecting cylinder for driving unit 223 is a cylindrical body. First ratchet teeth 223a... 223a that are detachably engaged with the first ratchet claws 223g and 223g of the drive body 230 are formed on the outer periphery of the connecting cylinder 223 for the drive unit. Yes.

  The driving unit connecting cylinder 223 is arranged between the outer periphery of the driving unit connecting unit 250 of the speed increasing device 210 of the transmission unit 202 and the inner periphery of the driving unit 230. Accordingly, a moving space 239 is defined between the inner periphery of the driving unit connecting cylinder 223 and the outer periphery of the driving unit connecting unit 250. Further, in this state, the first ratchet teeth 223a... 223a can be engaged with the first ratchet claws 223g and 223g of the driving body 230.

  The connection means of the second embodiment is composed of the first connection means and the second connection means, as in the first embodiment, and the first connection means includes the abutment body 233 and the covered body. A contact body 226. The abutting body 233 of the second embodiment is held in a non-movable manner by the driving unit connecting cylinder 223 of the driving unit 203. Specifically, it is formed on the inner periphery of the connecting cylinder 223 for the drive unit so as to integrally protrude from the inner periphery to the inner side in the radial direction. Therefore, in this second embodiment, the connecting cylinder for driving unit 223 constitutes a contact body holding portion that holds the contact body 233. The contact body 233 integrally formed with the drive unit connecting cylinder 223 in this manner is arranged in the moving space 239 and is connected to the drive unit connecting cylinder as the drive body 230 rotates. The moving space 239 is moved in accordance with the rotation of H.223.

  In this second embodiment, the abutted body 226 is held immovably by the drive portion connecting portion 250 of the speed increasing device 210 as shown in FIG. Specifically, it is formed so as to protrude integrally with the outer peripheral tip of the drive portion connecting portion 250 to the radially outer moving space portion 239. Therefore, in the second embodiment, the driving unit connecting portion 250 constitutes a contacted body holding portion that holds the contacted body 226. The vertical contact body 226 formed at the outer peripheral tip of the drive portion connecting portion 250 in this way is moved to the moving space portion 239 when the drive body 230 rotates in the clockwise direction with respect to the axle 110. In this contact state, the drive portion connecting portion 250 of the transmission portion 2 and the drive body 230 and the transmission portion connecting cylindrical body 223 are connected to each other in a non-rotatable state. To do.

  On the other hand, when the drive body 230 rotates counterclockwise with respect to the axle 110, the contact between the contact body 233 and the contacted body 226 is separated, and the connection between the drive body 230 and the transmission body 220 by the first connection means. Is released.

  The second connecting means includes two second ratchet claws 252 and 252 attached to the driving body 230 and second ratchet teeth 225 a to 225 a formed on the transmission body 220. The second ratchet pawls 252 and 252 and the second ratchet teeth 225a... 225a are connected when the drive body 230 rotates in the clockwise direction with respect to the transmission body 220 of the drive body 230 as shown in FIG. Then, the drive body 230 and the transmission body 220 are not connected when the drive body 230 rotates in the counterclockwise direction with respect to the transmission body 220.

  In addition, when the driving body 230 rotates once in the connected state by the second connecting means, the transmission body 220 rotates once.

  Next, the operation of the bicycle hub having the automatic transmission mechanism 200 of the second embodiment will be described. The state shown in FIG. 12 in which the contacted body 226 is positioned on the counterclockwise side of the contact body 233 and contacts the contact body 233 will be described.

  As in the first embodiment, a bicycle is stepped on and a pedal is depressed to turn a crank. Thereby, the drive body 230 rotates clockwise via the chain and the chain winding gear 32a. During the rotation, the second ratchet pawl 252 of the driving body 230 and the second ratchet teeth 225a... 225a of the transmission body 220 engage with each other as shown in FIG. 14A. As a result, the drive unit 203 and the transmission unit 202 are coupled by the second coupling means, and the transmission body 220 rotates once while the drive body 230 makes one rotation with the rotation of the drive body 230 in the clockwise direction. To do.

  Further, the drive part connecting part 250 of the speed increasing device 210 of the transmission part 202 connected to the drive body 230 of the drive part 203 by the second connecting means is connected to each planetary gear 253a... 253a and the support member 253b. The drive body 230 rotates at a rate of 0.75 rotation during one rotation.

  Further, when the driving body 230 is rotated in the clockwise direction, as shown in FIG. 14A, the first ratchet claws 223g and 223g of the driving body 230 and the first ratchet teeth 223a to 223a of the connecting cylinder 223 for the driving unit. And the drive unit connecting cylinder 223 rotates together with the drive unit 230.

  As a result, the contact body 233 rotates clockwise with respect to the contacted body 226 and moves away from the contacted body 226. Therefore, in this state, the connection by the first connection means is not performed, and the state of being connected by the second connection means is maintained.

  Further, when the driving body 230 rotates in the clockwise direction, the state in which the driving body 230 and the transmission body 220 are connected by the second connecting means is maintained, and the contact body 233 moves in the moving space portion 239 as shown in FIG. 14B. Then, it comes into contact with the contacted body 226. As a result, the driving body 230 and the driving portion connecting portion 250 of the speed increasing device 210 are connected so as to be non-rotatable via the driving portion connecting cylinder 223, and the driving body 230 and the transmission body 220 are connected to the driving portion. They are connected by the first connecting means via the connecting cylinder 223, the speed increasing device 210, the contact body 233, and the contacted body 226. In FIGS. 14A and 14B, only the driving body 230 is rotated.

  Then, the abutted body 226 that abuts against the abutting body 233 is pressed clockwise by the abutting body 233, whereby the driving unit connecting portion 250 and the driving body 230 are rotated at the same speed in the clockwise direction. Rotate to.

  When the driving unit connecting portion 250 of the speed increasing device 210 rotates at the same speed as the driving body 230, the transmission body 220 is clockwise and the driving body 230 is 1 through the support member 253b and the planetary gears 253a. It rotates at a rate of about 1.33 rotations during rotation.

  When the transmission body 220 rotates in the clockwise direction faster than the drive body 230 by the connection by the first connection means, the drive body 230 rotates in the counterclockwise direction relative to the transmission body 220. As a result, the second ratchet pawl 252 and the second ratchet teeth 225a... 225a cannot be engaged, and the second connecting means cannot be connected.

  When releasing the connection by the first connecting means, it is only necessary to rotate the driving body 230 counterclockwise as in the first embodiment, and thereby the connection by the first connecting means can be released. Accordingly, in this case as well, it is not necessary to perform a shifting operation by hand or to depress the pedal with a certain force or more, and even a person with weak leg power can easily shift.

  In the second embodiment, the abutting body 233 is held in the drive unit connecting cylinder 223 so as not to move, and the abutted body 226 is held in the drive unit connecting part 250 so as not to move. However, the configuration is not limited to this, and for example, the abutting body 233 is movably held by the driving unit connecting cylinder 223, and the abutted body 226 is held by the driving unit linking unit 250 so as to be immovable. Alternatively, the abutting body 233 is held in the driving unit connecting cylinder 223 so as not to move, and the abutted body 226 is held in the driving unit connecting part 250 so as to be movable. Further, the contact body 233 may be movably held by the drive unit connecting cylinder 223 and the contacted body 226 may be movably held by the drive unit connection unit 250. obtain. The above is the description of the second embodiment.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  The automatic transmission mechanism 300 of the third embodiment is implemented as a bicycle hub having the automatic transmission mechanism 300 as in the first embodiment. Although not shown, the bicycle hub having the automatic transmission mechanism 300 includes a hub body, an axle 110 that rotatably supports the hub body, and an automatic transmission mechanism 300.

  The hub main body and axle 110 have the same configuration as that of the first embodiment.

  As shown in FIG. 15, the automatic transmission mechanism 300 according to the third embodiment includes a drive unit 3, a transmission unit 2, a first connection unit, a second connection unit, a first connection maintaining unit, and a second connection maintaining unit. Means.

  The transmission part 2 and the 2nd connection means have taken the same structure as the thing of previous 1st Embodiment.

  A through hole 301 serving as an abutment body receiving / holding portion penetrating from the outer periphery to the storage portion 34 on the inner peripheral side is formed in the outer periphery on the base end side of the drive body 330 of the drive unit 3 of the third embodiment. Yes.

  Similar to the first embodiment, the first connecting means includes a contact body 333 and a contacted body 26, and the contacted body 26 is the same as that of the first embodiment. The same configuration is adopted.

  In the third embodiment, the contact body 333 is configured separately from the drive body 330 and is held by the drive body 330 so as to be movable in the radial direction. More specifically, the contact body 333 includes a contact main body portion 334, an operation portion 335 that operates the contact main body portion 334, and a shaft portion 336 that connects the contact main body portion 334 and the operation portion 335. Consists of things.

  The contact body 333 is held by a holding member 340 provided on the outer periphery of the drive body 330 of the drive unit 3 in a state where the contact body 334 is passed through the through hole 301 of the drive body 330. . Further, in this state, the contact main body portion 334 protrudes into the moving space portion 39 radially inward from the inner periphery of the drive body 330 and can be contacted with the contacted body 26 when the drive body 330 rotates. Is coordinated to.

  Further, the contact main body portion 334 of the contact body 333 supported by the holding member 340 in this way does not protrude from the contact possible position shown in FIG. 15 into the moving space portion 39 as shown in FIG. Further, from the range up to the contact impossible position where the drive body 330 cannot be contacted with the contacted body 26 and the contact possible position shown in FIG. 15, the transmission part of the transmission part 2 as shown in FIG. The range up to the fixing position where the transmission unit connecting cylinder member 23 of the transmission unit 2 and the driving unit 330 can be fixed in a non-rotatable state when the driving unit 330 rotates by contacting the connecting unit cylinder member 23 in the radial direction. It can be moved.

  The second connection maintaining means appropriately disables the connection by the first connection means and keeps the drive body 330 and the transmission body 20 in the connected state by the second connection means, and releases the maintenance. Is. The second connection maintaining means of this embodiment makes the connection by the first connection means impossible by engaging and disengaging the contact main body 334 of the contact body 333 at the contact impossible position. It is in the state connected by the 2nd connection means. More specifically, as shown in FIG. 16, the engagement ball 341 provided on the holding member 340 is fitted into the second connection maintaining hole 336 a provided on the shaft portion 336 of the contact body 333. The contact main body 334 is locked at the position where the contact cannot be made.

  The first connection maintaining means appropriately disables the connection by the second connection means and keeps the drive body 330 and the transmission body 20 in the connected state by the first connection means, and releases the maintenance. Is. In the first connection maintaining means of this embodiment, the contact main body 334 of the contact body 333 is detachably locked at the fixed position, thereby disabling the connection by the second connection means. It is in the state connected by the connection means.

  Specifically, as shown in FIG. 17, the contact main body portion 334 of the contact body 333 is connected to the transmission portion 2 of the radially inner transmission portion 2 by a coil spring 350 as an urging member attached to the holding member 340. The cylinder body 23 is urged toward the side, and the urging force locks the contact main body 334 of the contact body 333 at the fixed position. As a result, the driving body 330 and the transmission portion connecting cylinder member 23 of the transmission portion 2 are always fixed to each other in a non-rotatable state, and the transmission of the driving body 330 and the transmission portion 2 is performed when the driving body 330 rotates in the clockwise direction. The body 20 is fixed to the non-rotatable state via the transmission-use connecting cylinder member 23. The rest of the third embodiment has the same configuration as that of the first embodiment.

  Next, the operation of the third embodiment will be described.

  First, the vehicle travels in a state in which the contact main body portion 334 is arranged at the contactable position shown in FIG. 15 protruding into the moving space portion 39 radially inward from the inner periphery of the driving body 330. Accordingly, as in the case of the first embodiment, the driving body 330 and the transmission body 20 are secondly connected from the connection by the second connection means to the connection by the first connection means, or from the connection by the first connection means. It is possible to travel by switching to the connection by the connection means.

  When the connection state is always maintained by the second connection means without being connected by the first connection means, the operation portion 335 is grasped and pulled outward in the radial direction from the state shown in FIG. As a result, as shown in FIG. 16, the locking ball 341 of the holding member 340 fitted in the contact maintaining hole 336b provided in the shaft portion 336 exits from the contact maintaining hole 336b, and the second connection It can be fitted into the maintenance hole 336a, and the contact main body 334 can be locked at a position where it cannot be contacted.

  In a state where the contact main body portion 334 is locked at the contact impossible position, the contact body 333 does not contact the contacted body 26 even if the driving body 330 rotates with traveling. Therefore, the driving body 330 and the transmission body 20 are not connected by the first connecting means, and can be maintained in the connected state by the second connecting means.

  On the other hand, when the connection state is always maintained by the first connection means without being connected by the second connection means, the operation unit 335 is gripped from the state shown in FIG. 15 or the state shown in FIG. Press the button. As a result, as shown in FIG. 17, the locking ball 341 fitted in the contact maintaining hole 336b or the second connection maintaining hole 336a comes out, and the biasing force of the coil spring 350 causes the contact body 333 to move. The abutment main body 334 can be locked at a fixed position pressed against the transmission connecting cylinder member 23.

  In this state, the driving body 330 and the transmission portion connecting cylinder member 23 of the transmission portion 2 are fixed to each other in a non-rotatable state, and transmission of the driving body 330 and the transmission portion 2 is performed when the driving body 330 rotates in the clockwise direction. The body 20 is fixed in a non-rotatable state with respect to each other via the connecting portion connecting cylinder member 23. Therefore, whenever the driving body 330 rotates in the clockwise direction as the vehicle travels, the transmission body 20 always rotates at the same rotational speed, and the transmission body 20 rotates in the clockwise direction faster than the connection portion 50 for transmission. The part connecting part 50 rotates counterclockwise with respect to the transmission body 20 (see FIG. 9).

  As a result, the second ratchet pawl 52 and the second ratchet teeth 25a... 25a of the transmission unit 2 cannot be engaged, and the drive body 330 and the transmission body 20 cannot be connected by the second connection means. Thereby, the drive body 330 and the transmission body 20 are not connected by the second connecting means, and can be maintained in the connected state by the first connecting means.

  As described above, when the contact main body portion 334 projects in the movable space portion 39 and is positioned at the contactable position shown in FIG. 15, the connection by the second connection means is changed to the connection by the first connection means. Alternatively, the connection by the first connection means is switched to the connection by the second connection means. Therefore, for example, even if a person riding a bicycle does not intend to change gears, the person may change gears regardless of the intentions of the people who ride the bicycle. However, as in the third embodiment, by providing the first connection holding means and the second connection holding means, the connection state is always made by the second connection means, or always by the first connection means. It is also possible to run in a connected state without shifting.

  In the third embodiment, both the first connection maintaining means and the second connection maintaining means are provided. However, the present invention is not limited to this configuration, and either one may be provided. .

  In the third embodiment, the contact body 333 is held by the drive body 330 so that it cannot move in the circumferential direction and can move in the radial direction. For example, the contact body 333 can be moved in the circumferential direction and can move in the radial direction. You may make it hold | maintain and can change suitably.

  Further, in the third embodiment, as the first connection maintaining means, the contact body 334 of the contact body 333 is pressed against the outer periphery of the transmission connecting tube member 23 of the transmission unit 2 by the coil spring 350. The abutment body 334 of the abutment body 333 is locked at a fixed position. However, the present invention is not limited to this configuration. For example, as shown by a broken line in FIG. A fitting portion 360 into which the tip end of the abutting body portion 334 of the abutting body 333 is fitted is provided on the outer periphery of the cylindrical member 23, and the abutting body portion 334 of the abutting body 333 is placed in the fitting portion 360. The coil spring 350 may be urged. By doing so, the contact main body portion 334 of the contact body 333 and the transmission portion connecting cylinder member 23 of the transmission portion 2 can be made less likely to slide, and the contact body of the contact body 333 can be more reliably secured. The part 334 can be locked in a fixed position. The above is the description of the third embodiment.

  In the above embodiment, the automatic transmission mechanisms 1, 200, 300 are integrally formed with the hub body 100 of the bicycle hub. However, the automatic transmission mechanisms 1, 200 are integrated with the hub body 100 of the bicycle hub. And may be attached to a general bicycle hub that has been used conventionally, and can be changed as appropriate.

  Further, as in the first embodiment and the third embodiment, when the abutted body 26 is configured separately from the transmitting portion connecting cylinder member 23 of the transmitting portion 2, the abutted body 26 is spherical. For example, it may be configured as a quadrangular prism and the receiving member receiving / holding portion 27 of the transmitting portion connecting cylinder member 23 may be slid.

  Moreover, the automatic transmission mechanism of the present invention can be used not only for bicycles but also for various mechanical devices.

  Furthermore, the bicycle referred to in the present invention includes not only a general bicycle but also a tricycle, a four-wheel vehicle, an electric bicycle equipped with an electric motor, and the like.

It is explanatory drawing which made a part of bicycle hub which has an automatic transmission mechanism of 1st Embodiment of this invention into the cross section. FIG. 2 is an enlarged cross-sectional explanatory view of a main part of the automatic transmission mechanism of FIG. 1. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is sectional drawing which follows the VV line of FIG. 6A is a cross-sectional explanatory view showing a state where the driving body is rotated by the driving force from the state of FIG. 3, and FIG. 6B is a cross-sectional explanatory view showing a state where the driving body is further rotated from the state of FIG. 6A. FIG. 7A is an explanatory cross-sectional view illustrating a state in which the driving body further rotates from the state of FIG. 6B and the contact body is in contact with the contacted body. 7B is a cross-sectional explanatory view showing a state in which the driving body further rotates from the state of FIG. 7A and the abutted body is moving the abutting body receiving holding portion. 7B is a cross-sectional view showing a state in which the driving body further rotates from the state of FIG. 7B and the abutted body abuts on the abutted body stop portion of the abutted body receiving holding portion and is coupled by the first coupling coupling means. FIG. It is sectional explanatory drawing for demonstrating the relationship between the 2nd ratchet nail | claw and the 2nd ratchet tooth | gear in the state connected by the 1st connection means. It is sectional drawing which shows other embodiment of a contact body. It is a side view of the hub for bicycles which has the automatic transmission mechanism of a 2nd embodiment. It is sectional drawing which follows the XII-XII line | wire of FIG. It is sectional drawing which follows the XII1-XIII line | wire of FIG. 14A is a cross-sectional explanatory view of the state where the driving body is rotated by the driving force from the state of FIG. 12, and FIG. 14B is a state where the driving body further rotates from the state of FIG. It is sectional explanatory drawing which shows the state connected by the 1st connection connection means. It is sectional drawing which shows the automatic transmission mechanism of 3rd Embodiment. It is sectional drawing which shows the state which hold | maintained the contact main-body part in the contact impossible position by the 2nd connection maintenance means. It is sectional drawing which shows the state which hold | maintained the contact main-body part in the fixed position by the 1st connection maintenance means.

Explanation of symbols

1, 200, 300 Automatic transmission mechanism 2, 202 Transmitter 3, 203 Drive unit 20, 220 Transmitter 30, 230, 330 Driver 26, 226 Contacted body 33, 233, 333 Contacted body 21a, 221a First Ratchet teeth 23g, 223g 1st ratchet pawl 25a, 225a 2nd ratchet teeth 52, 252 2nd ratchet pawl 100 Hub body 110 Axle Patent applicant Ryuji Nakano Applicant attorney Koichi Tagawa

Claims (8)

The driving body is arranged so as to be able to rotate with respect to the axle by receiving the driving force, and the hub body which is rotatably arranged with respect to the driving body and is supported rotatably on the axle. A transmission body for transmission, a first connection means for connecting the drive body and the transmission body so as to be capable of rotational transmission, and a rotational speed of the transmission body relative to the drive body by the first connection means for the drive body of the transmission body Second connection means for connecting the drive body and the transmission body so as to be capable of rotational transmission so as to be slower than the rotation speed;
The first connecting means includes a contacted body held by the contacted body holding part and a contact body held by the contacted body holding part. The transmission body is configured to rotate in the driving direction as the body holding portion rotates in the driving direction, and the contact body holding portion is rotated in the driving direction as the driving body rotates in the driving direction. The contact body is configured to contact the contact body and the contacted body after the driving body is rotated by a predetermined amount toward the driving direction with respect to the contacted body holding portion, The drive body and the transmission body are connected via the abutted body so as to be able to transmit the rotation, and the connected drive body and the transmission body are connected when the drive body is rotated in the opposite direction to the abutted body holding portion. Is to be decoupled,
The second connection means connects the drive body and the transmission body in a state where the connection between the drive body and the transmission body by the first connection means is released, and connects the drive body and the transmission body by the first connection means. An automatic transmission mechanism that disables the connection between the driving body and the transmission body ,
The automatic transmission mechanism can disable the connection by the second connecting means and maintain the connected state by the first connecting means, and disable the connection by the first connecting means and the first connecting means that can be released from the maintenance. An automatic transmission mechanism comprising at least one of second connection maintaining means capable of maintaining the connection state by the second connection means and releasing the maintenance . The abutted body is held movably in the circumferential direction by the abutted body holding portion until it abuts against the abutted body holding portion provided in the abutted body holding portion,
The first connecting means contacts the abutting body and the abutting body after the driving body rotates by a predetermined amount toward the driving direction with respect to the abutting body holding portion, and The drive body and the transmission body are connected to each other so as to be able to transmit the rotation via the abutted contact body and the abutted body by contacting the abutted body stopper. The automatic transmission mechanism according to claim 1. The contact body has a radial direction from a contact position that can contact the contacted body to a contact impossible position that can contact the contacted body when the drive body rotates relative to the contacted body holding portion. It is held in the contact body holding part so as to be movable,
3. The automatic transmission mechanism according to claim 1, wherein the second connection maintaining means is configured to detachably engage the contact body at a position where contact cannot be made. The abutting body abuts on the abutting body holding portion from a contact position where the abutting body can abut on the abutting body when the driving body rotates with respect to the abutting body holding portion in the driving direction. It is held by the abutting body holding portion so as to be movable in the radial direction within a range up to a fixing position where the body can be fixed to each other in a non-rotatable state.
The automatic transmission mechanism according to any one of claims 1 to 3, wherein the first connection maintaining means engages and disengages the contact body at a fixed position. The automatic transmission mechanism includes a speed reduction mechanism portion and a transmission portion connection portion that is transmitted while reducing the rotation from the drive body via the speed reduction mechanism portion,
The first connecting means causes the contact body and the contacted body to come into contact with each other after the drive body has rotated a predetermined amount toward the driving direction side with respect to the contacted body holding portion. The drive body and the transmission body are connected in a non-rotatable state via the contact body and the contacted body,
The second connecting means includes a transmitting portion connecting portion and a transmitting body when the transmitting portion connecting portion rotates in the driving direction side of the driving body relative to the abutted body holding portion. And connecting the transmitting portion connecting portion and the transmitting body when the transmitting portion connecting portion rotates in the counter driving direction side with the rotation of the driving body in the counter driving direction side with respect to the abutted body holding portion. The automatic transmission mechanism according to any one of claims 1 to 4 , wherein the automatic transmission mechanism is incapable of being connected. The automatic transmission mechanism includes a speed increasing mechanism portion and a drive portion connecting portion that transmits the speed increasing speed to the transmission body via the speed increasing mechanism portion,
The abutted body holding part is composed of a connecting part for driving part,
The first connecting means causes the contact body and the contacted body to come into contact with each other after the drive body has rotated a predetermined amount toward the driving direction side with respect to the contacted body holding portion. The drive unit connecting portion and the drive body are connected to each other in a non-rotatable state via the contact body and the contacted body,
The second connecting means connects the driving body and the transmission body when the driving body rotates with respect to the abutting body holding portion in the driving direction side, and moves the driving body to the counter driving direction side with respect to the abutting body holding portion. The automatic transmission mechanism according to any one of claims 1 to 4 , wherein the drive body and the transmission body cannot be connected during rotation. The abutting body is held by the abutting body holding portion so as to be movable in the circumferential direction until it abuts on the abutting body stopper provided in the abutting body holding portion.
The first connecting means contacts the abutting body and the abutted body after the driving body rotates a predetermined amount in the driving direction with respect to the abutted body holding portion. The contact body and the contact body are connected to each other so as to be able to transmit the rotation through the contact body and the contacted body by contacting the contact body stopper. The automatic transmission mechanism according to any one of claims 1 to 6 . An axle that is non-rotatably attached to the bicycle, a hub body that is rotatably supported on the axle, and an automatic transmission mechanism;
The automatic speed change mechanism is configured to transmit a rotation of a driving body arranged so as to be able to rotate with respect to an axle by receiving a driving force, a transmission body constituted by a part of a hub body, and the driving body and the transmission body. A first connecting means that can be connected, and a driving body and a transmitting body such that the rotational speed of the transmission body relative to the driving body is slower than the rotational speed of the transmitting body connected to the driving body by the first connecting means. And a second connecting means for connecting to be able to transmit rotation,
The first connecting means includes a contacted body held by the contacted body holding part and a contact body held by the contacted body holding part. The transmission body is configured to rotate in the driving direction as the body holding portion rotates in the driving direction, and the contact body holding portion is rotated in the driving direction as the driving body rotates in the driving direction. The contact body is configured to contact the contact body and the contacted body after the driving body is rotated by a predetermined amount toward the driving direction with respect to the contacted body holding portion, The drive body and the transmission body are connected via the abutted body so as to be able to transmit the rotation, and the connected drive body and the transmission body are connected when the drive body is rotated in the opposite direction to the abutted body holding portion. Is to be decoupled,
The second connection means connects the drive body and the transmission body in a state where the connection between the drive body and the transmission body by the first connection means is released, and connects the drive body and the transmission body by the first connection means. A bicycle hub having an automatic transmission mechanism that disables connection between the drive body and the transmission body ,
The automatic transmission mechanism can disable the connection by the second connecting means and maintain the connected state by the first connecting means, and disable the connection by the first connecting means and the first connecting means that can be released from the maintenance. A bicycle hub having an automatic transmission mechanism, characterized in that it has at least one of second connection maintaining means that can be maintained in a connected state by the second connecting means and can be released from maintenance .

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