JPH0333940B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a mechanism for converting rotational motion of a motor, reciprocating motion of a cylinder unit, and further manual rotational motion or reciprocating motion into intermittent rotational motion.

(Prior Art) A ratchet mechanism as shown in FIG. 26 is known as a mechanism for periodically rotating a gear or the like in a fixed direction. This ratchet mechanism meshes a drive pawl 101 and a restriction pawl 102 with a gear 100, so that one rotation of the drive pawl 101 causes the gear 100 to rotate one frame, and the restriction pawl 102 prevents the gear 100 from rotating back. A spring 103 of the regulating claw 102 biases the gear 100 in the direction.

Furthermore, not only the above-mentioned ratchet mechanism but also generally applied intermittent rotation mechanisms combine gears and pawls.

(Problems with the prior art) Since the conventional intermittent rotation mechanism described above combines gears and pawls, there is a limit to how small the mechanism itself can be made, and furthermore, a return spring must be provided for the pawls, which is extremely difficult to achieve. It is difficult to assemble into a limited space, and the manufacturing of the members that make up the mechanism is also troublesome.

(Objective of the Invention) The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to be able to be significantly smaller than the conventional one, to facilitate the manufacture of component parts, and to reduce operating noise. An object of the present invention is to provide an intermittent rotation mechanism that can reduce intermittent rotation.

(Structure of the Invention) In order to achieve the above object, the first invention stacks a fixed body on one side of a rotating body and a driven rotating body on the other side, and fixes a magnet pin inserted into the rotating body by rotating the rotating body. The magnet part installed on the body attracts and separates the pin, and this attraction and separation causes the magnetic pin to engage and disengage from the driven rotating body.
The second invention has a configuration in which the rotation of the rotating body is intermittently transmitted to the driven rotating body, and the second invention provides a sliding member in place of the rotating body of the first invention, and the linear movement of the sliding member is controlled by a magnetic pin. The structure is such that the signal is transmitted intermittently to the driven rotating body through the transmission line.

(Example) Examples of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a vertical sectional view of the first embodiment of the present invention, and the second
The drawings are a sectional view taken along the line A--A in FIG. 1, FIG. 3 is an exploded perspective view of the main components of the first embodiment, and FIG. 4 is a perspective view showing the operation of the first embodiment.

In the figure, 1 is a case, and a drive shaft 3 of a motor 2 capable of forward and reverse rotation is inserted into the case 1, and a drive gear 4 is fitted onto the drive shaft 3. Further, a driven rotating body 5 having a rotating shaft 5a is disposed in the case 1, and a gear 6, which is a rotating body, is rotatably fitted onto the rotating shaft 5a of the driven rotating body 5. The drive gear 4 is meshed with it. A rotating shaft 5a protruding from the gear 6 is rotatably inserted into a fixed body 7 fixed to the case 1. In the figure, the fixed body 7 is assembled on the upper surface of the gear 6, and the driven rotating body 5 is assembled on the lower surface thereof.

The gear 6 has a through hole 8 that opens on both the surface facing the fixed body 7 and the surface facing the driven rotary body 5.
A magnet pin 9, which is shorter than the length of the through hole 8, is slidably inserted into the through hole 8.

Two magnets 10 and 11 are buried in the fixed body 7 spaced apart in the circumferential direction, and each magnet 10 and 11
The magnetic poles are reversed. For example, for the magnet 10, the part facing the gear 6 is the S pole, for the magnet 11, the part facing the gear 6 is the N pole, and when the driven rotating body 5 is rotated clockwise in FIG. The part of the pin 9 facing the fixed body 7 is the S pole, and the part facing the driven rotating body 5 is the N pole.
Take it as a pole.

Further, a plurality of recesses 12 are formed on the surface of the driven rotary body 5 facing the gear 6. The recesses 12 are sized to fit the magnet pins 9 and are provided in the circumferential direction of the driven rotating body 5, with the interval between the recesses 12 being equal to the interval between the magnets 10 and 11 embedded in the fixed body 7. There is. An operating piece 13 is attached to the end of the rotating shaft 5a of the driven rotating body 5 that protrudes from the case 1. This operation piece 13 is for operating limit switches 14a, 14b, and 14c. For example, when the driven rotating body 5 is at the reference position, the limit switch 14a is operated, and then, as will be described later, the driven rotating body 5 is rotated by a predetermined angle. When this occurs, the limit switch 14b is activated, and when the driven rotating body 5 rotates, the limit switch 14c is activated.

Next, the operation of the first embodiment will be explained based on FIGS. 4A to 4C.

First, assume that the state shown in FIG. 4A is the reference position. In this state, the magnet pin 9 is repelled by the magnet 10, and the end of the magnet pin 9 fits into the recess 12 of the driven rotating body 5. From this state, motor 2
When the gear 6 is rotated in the normal direction and the gear 6 is rotated in the direction of the arrow a, the gear 6 and the driven rotating body 5 are engaged with each other via the magnet pin 9 as shown in FIG. 4B, so the driven rotating body 5 is also integrated. Rotate the target. This rotation causes the operating piece 13 to move away from the limit switch 14a and toward the limit switch 14b. Further, the motor 2 is set so that when the gear 6 rotates and the magnet pin 9 reaches the position of the magnet 11, the motor 2 is stopped or reversed. Then, when the magnet pin 9 reaches the position of the magnet 11, the magnet pin 9 is attracted and comes out of the recess 12 as shown in FIG. 4C. If the motor 2 is reversed in this state, the gear 6 and the driven rotating body 5
Since the engagement with the gear 6 is released, only the gear 6 rotates in reverse. When the magnet pin 9 comes to the position of the magnet 10 again, the magnet pin 9 is repelled by the magnet 10 and fits into another recess 12 adjacent to the recess 12. At this point, the motor 2 is stopped or rotated forward. When the motor 2 is rotated in the normal direction again, the driven rotating body 5 rotates by the same action as described above, and the operating piece 13 operates the limit switch 14c.

FIG. 5 is an exploded perspective view showing the second embodiment,
In this embodiment, three magnets 15, 16, 1
7 is buried in the fixed body 7. Each magnet 15,1
6 and 17 are provided in the circumferential direction, and magnet 15 and magnet 1
6 and the spacing between magnets 16 and 17 are made equal, and the magnetic poles of magnets 15 and 17 are oriented in the same direction, and the magnetic poles of magnet 16 are opposite to these. For example, when inserting the magnet pin 9 into the through hole 12 of the gear 6 so that the part of the magnet pin 9 facing the fixed body 7 becomes the S pole, the parts of the magnets 15 and 17 facing the gear 6 become the N pole. The pole is the part of the magnet 16 facing the gear 6.
Take it as a pole.

The operation is based on the assumption that the reference position is a state in which the magnet 16 and the magnet pin 9 are aligned and the magnet pin 9 is fitted into the repelled recess 12 of the driven rotating body 5.
When the gear 6 is rotated from the reference position in the direction of the arrow a or the direction of the arrow b using a motor capable of forward and reverse rotation, the gear 6 and the driven rotating body 5 are engaged with each other via the magnet pin 9. Therefore, the driven rotating body 5 also rotates integrally. Also, the magnet pin 9 is connected to the magnet 15
Or, if it matches the magnet 17, the magnet pin 9 is attracted and comes out of the recess 12, and the engagement between the gear 6 and the driven rotating body 5 is released, so when the gear 6 returns to the reference position and rotates, , only the gear 6 rotates, and the driven rotating body 5 does not rotate.

Therefore, in the first embodiment, for example, after operating the limit switch 14b, in order to operate the limit switch 14a again, the limit switch 14c must be operated once. In the embodiment, by appropriately combining the rotations of the motors, the driven rotating body 5 can be rotated intermittently in either direction.

FIG. 6 is an exploded perspective view showing the third embodiment,
In this embodiment, the same number of magnets 18 as the number of recesses 12 formed in the driven rotating body 5 are embedded in the fixed body 7. The magnets 18 are arranged so that their magnetic poles are alternately reversed, and the spacing between the magnets 18, 18 and the spacing between the recesses 12, 12 are equal.

Therefore, when the gear 6 is continuously rotated in one direction, the magnet pin 9 is alternately attracted and repelled by the magnets 18, and when it is attracted to the magnet 18, only the gear 6 is rotated. While rotating and being repelled by the magnet 18, the gear 6 and the driven rotating body 5 rotate integrally. Therefore, in the case of the third embodiment, continuous rotational motion of the motor etc. can be converted into intermittent rotational motion. Furthermore, it is possible to achieve the same effect without using a motor capable of forward and reverse rotation as in the first embodiment.

Further, the mechanism according to the present invention can be applied not only to actuating a predetermined limit switch of an electric device or the like, but also to a variety of other uses, an example of which is shown in FIG. FIG. 7 shows an example in which the damping force adjustment of a shock absorber is applied. In this shock absorber, a hollow rod 21 having a piston 20 fixed thereon is slidably fitted into a cylinder 19, and the driven rotor is inserted into the hollow rod 21. Insert the rotating shaft 5a extending from the body, and
A plate body 22 having a plurality of orifice holes 22a is fitted to the lower end of a, and by rotating a rotating shaft 5a, a predetermined orifice hole 22a and oil hole 23 are made to coincide with each other, thereby adjusting the damping force. It is.
Here, the orifice hole 22a corresponds to the operating piece 13 described in the first to third embodiments.

In the above example, a magnet is embedded in the fixed body 7, but the fixed body 7 itself may be made of a magnet. However, embedding the magnet in the fixed body facilitates positioning during assembly and is advantageous in terms of cost.

FIG. 8 is a longitudinal sectional view of the mechanism according to the fourth embodiment, and FIG. 9 is a sectional view taken along the line B-B in FIG. A rack 24 is provided as a member. The rack 24 is slidably disposed inside the case 1 and is biased by a spring 25. By pulling the wire 26 or rod fixed to the rack 24 by an external operation, the rack 24 can be moved to a The gear 6 moves linearly in the direction b, and together with this, the gear 6 rotates in the b direction. At this time, the magnet pin 9 inserted into the through hole 8 of the gear 6 is repelled by the magnet 10 provided on the fixed body 7 and fitted into the recess 12 of the driven rotating body 5, so that the magnet pin 9 is inserted into the through hole 8 of the gear 6. The driven rotating body 5 rotates integrally. Then, at the position where the rack 24 reaches its travel limit, the magnet pin 9 aligns with a magnet (not shown) provided on the fixed body 7, and is attracted by this magnet, and the engagement between the gear 6 and the driven rotating body 5 is released. spring 2
When the rack 24 returns with an elastic force of 5, only the gear 6 rotates.

In the above explanation, the case where two magnets are embedded in the fixed body 7 as in the first embodiment has been described, but as in the second and third embodiments,
Three or more magnets may be buried. In addition to a cylinder unit or a cam, manual operation may also be considered as a means for pulling the wire 26. Further, in the illustrated example, the spring 25 is disposed only at one end of the rack 24, but a structure may be adopted in which springs are compressed at both ends of the rack 24 to hold the rack 24 in a neutral position.

10 and 11 are perspective views showing main parts of the fifth embodiment and the sixth embodiment, respectively. In the fifth embodiment, a helical gear 4a is used as a driving member for rotating a gear 6 which is a rotary body. Also, the 6th
In the embodiment, a worm 4b is used as the driving member. The other structures of these embodiments are the same as those shown in the first to third embodiments.

12 is a partially cutaway front view of the seventh embodiment, and FIG. 13 is a view taken in the direction of arrow C in FIG.
A driven rotating body 5 formed with a disk 28 which is a rotating body
and a fixed body 7 in which magnets 10 and 11 that attract or repel the magnet pin 9 inserted into the through hole 8 of the disk 28 are placed one on top of the other. Take out this arm 29
A tapered portion 30 is formed at the tip. on the other hand,
There is a push-pull solenoid 31 near case 1.
A tapered portion 33 is formed on the shaft 32 of the push-pull solenoid 31.
is in contact with the tapered portion 30 of the arm 29.

Therefore, the action is based on the shaft 32 of the solenoid 31.
protrudes in the direction a in the figure, causing the disk 28 to rotate in the direction b via the arm 29. At this time, the magnet pin 9 is repelled by the magnet 10 of the fixed body 7 and is pushed into the recess 12 of the driven rotary body 5. Since the driven rotating body 5 is fitted into the rotating body 5, the driven rotating body 5 also rotates integrally. Further, when the disk 28 rotates a predetermined angle, the magnet pin 9 is attracted by another magnet 11, and the engagement between the disk 28 and the driven rotating body 5 is released, the energization to the solenoid 31 is also stopped, and the disk 28 is The return spring 34 shown in FIG. 14 returns to the reference position. By repeating such operations, the driven rotating body 5 and rotating shaft 5a rotate intermittently, and a predetermined operation, such as switching a switch, is performed.

It is of course possible to apply the structures of the second and third embodiments described above to the structures shown in FIGS. 12 to 14.

FIG. 15 is a partial cross-sectional view of the mechanism according to the eighth embodiment. The rotating shaft 5a and the operating rod 36 inserted into the hollow rod 35 are coupled together, and a rotary solenoid or motor 37 is attached to the support plate 35a fixed to the hollow rod 35, and the rotary arm 38 of the rotary solenoid or motor 37 and the disk are connected. It is connected to an arm 29 extending from 28. The effect is that when the rotary solenoid or motor 37 rotates forward and backward, the magnet pin 8 inserted into the disc 28 is attracted or repelled by the magnets 10 and 11 embedded in the fixed body in the same manner as described above. Due to the suction and repulsion, the disc 28 and the driven rotating body 5 are engaged and disengaged, and the operating rod 36 rotates intermittently to perform a predetermined operation.

FIG. 16 is a longitudinal sectional view of the mechanism according to the ninth embodiment;
FIG. 17 is a plan view of FIG. 16, and in this embodiment, a wire 39 and a return spring 40 are fixed to an arm 29 extending from a disk 28.
By pulling this wire 39 and the elastic force of the return spring 40, the disk 28 is caused to rotate forward and backward. Furthermore, since the operation is similar to that of the embodiment described above, the same members are given the same numbers.

FIG. 18 is a partially cutaway plan view of the mechanism according to the tenth embodiment, and FIG. 19 is a longitudinal cross-sectional view of the same mechanism, and this embodiment shows the case where two operations are performed at the same time.

That is, a pair of intermittent rotation mechanisms using pulleys 41 as rotating bodies are prepared, a belt 42 is stretched between these pulleys 41, 41, and this belt 42 is run by a drive pulley 43, thereby controlling the driven rotation of each mechanism. An operating rod 3 connected to the rotating shaft 5a of the body 5
6 are made to rotate intermittently at the same time.
In this mechanism as well, the number of magnets embedded in the fixed body 7 is one of those shown in the first to third embodiments. This embodiment is particularly effective when adjusting the damping force of a pair of left and right front forks of a motorcycle.

FIG. 20 is a longitudinal sectional view of the mechanism according to the second invention, and FIG. 22 is a side view.
A driven rotating body 5 formed with... is rotatably arranged,
A slide member 44 and a fixed body 7 are stacked on this driven rotating body 5.

As shown in FIG. 21, a rectangular window 45 is formed in the center of the slide member 44, and the rotation shaft 5a of the driven rotating body 5 faces the window 45. It can be slid laterally without interfering with the Further, a long hole 46 is formed in the slide member 44 in a direction perpendicular to the window portion 45, and a magnet pin 9 is inserted into this long hole 46.
is loosely fitted.

The fixed body 7 also has a magnet 4 as shown in FIG.
7, 47, 48, 48, and 49 are buried. Here, the magnets 47, 47 have the same magnetic pole direction, and the magnets 48, 48, 49 have magnetic poles in the opposite direction to the magnet 47. For example, when the portion of the magnet pin 9 facing the fixed body 7 is set as the south pole, the portion of the magnet 47 facing the slide member 44 is set as the south pole. Further, the spacing between the recesses 12 and 12 and the spacing between the magnets 47 and 49 are made equal, and the magnets 47 and 48 are buried close to each other.

On the other hand, as shown in FIGS. 24 and 25, an annular groove 50 is formed on the surface of the driven rotating body 5 facing the slide member 44, and the recesses 12 are formed in the annular groove 50. . The lower end of the magnet pin 9 fits into this annular groove 50.

Further, the window portion 45 of the slide member 44 is connected to the rotating shaft 5.
It is divided into left and right chambers at a, and springs 51, 51 are interposed in these chambers.

Next, its effect will be explained. Here, it is assumed that the reference position is a position where the slide member 44 is in a neutral position and the magnet pin 9 is aligned with the magnet 49 of the fixed body 7. In this state, the magnet pin 9 is repelled by the magnet 49 and is fitted into the recess 12 of the driven rotating body 5.

When the slide member 44 is moved in either the left or right direction from this state, the driven rotor 5 rotates because the slide member 44 and the driven rotor 5 are engaged with each other via the magnet pin 9. In addition, magnet pin 9
Since it is loosely fitted into the elongated hole 46, as the driven rotating body 5 rotates, the magnet pin 9 moves within the elongated hole 46 as shown by the imaginary line in FIG.

Since the magnet pin 9 is set to be fixed to the magnet 47 when the slide member 44 reaches its travel limit, the magnet pin 9 is attracted by the magnet 47 when the slide member 44 reaches its travel limit. , recess 2
The sliding member 44 and the driven rotary body 5 are disengaged from each other. Thereafter, when the driving force acting on the slide member 44 is released, the slide member 44 returns to the reference position due to the elastic force of the spring 51. Since the lower end of the magnet pin 9 disengaged from the recess 12 has entered the annular groove 50, it moves along the annular groove 50 as the slide member 44 returns, returns to the reference position, and returns to this position. At this position, it is repelled again by the magnet 49 and fits into the recess 12.

By the way, a magnet 48 with magnetic poles opposite in direction is buried adjacent to the magnet 47. With such a configuration, the attraction effect by the magnet 47 will be exerted only when the position coincides with the magnet 47. Therefore, when the slide member 44 and the driven rotating body 5 are engaged and rotated together, the magnet pin 9 is attracted by the magnet 47 and does not come off from the recess 12. Therefore, the engagement/disengagement position between the slide member 44 and the driven rotating body 5 can be determined accurately. This arrangement of magnets can also be applied to the other embodiments described above.

In addition, in the present invention, since the frequency of collision between the magnet and the magnet pin is high, it is also possible to coat at least one of the magnet or the magnet pin with aluminum foil or a resin film in order to extend the life of these components. good.

(Effects of the Invention) As explained above, according to the present invention, the fixed body is stacked on one side of the rotating or sliding member, and the driven rotating body is stacked on the other side, and the magnetic pin provided on the rotating body or the sliding member is mounted on the fixed body. By attracting or repelling with the magnetic part, the rotating body or sliding member and the driven rotating body are engaged and disengaged, and the rotational motion of the rotating body or the linear motion of the sliding member is intermittently transmitted to the driven rotating body, and the driven rotating body is Since the body can be rotated by the desired angle, compared to conventional intermittent rotation mechanisms, it is possible to achieve a much smaller size and reduce the noise associated with operation.
Furthermore, the mechanism itself has many advantages such as easy assembly and reliable operation.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of the mechanism according to the first embodiment, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an exploded perspective view of the main components constituting the mechanism according to the first embodiment. 4A to 4C are perspective views for explaining the operation of the first embodiment, FIG. 5 is an exploded perspective view of the main components of the second embodiment, and FIG. 6 is an exploded perspective view of the main components of the third embodiment. A perspective view, FIG. 7 is a longitudinal cross-sectional view showing an example of a modification of the operating section,
FIG. 8 is a vertical sectional view of the mechanism according to the fourth embodiment, and FIG.
The figure is a sectional view taken along the line B-B of FIG. 8, FIG. 10 is a perspective view of the main parts of the fifth embodiment, FIG. 11 is a perspective view of the main parts of the sixth embodiment, and FIG. 12 is a perspective view of the main parts of the seventh embodiment. A partially cutaway front view of the example mechanism, Figure 13 is C of Figure 12.
14 is a plan view of the disc according to the seventh embodiment, FIG. 15 is a longitudinal sectional view of the mechanism according to the eighth embodiment, and FIG. 16 is a longitudinal sectional view of the mechanism according to the ninth embodiment. , FIG. 17 is a plan view of the mechanism according to the ninth embodiment,
FIG. 18 is a partially cutaway plan view of the mechanism according to the tenth embodiment, FIG. 19 is a longitudinal cross-sectional view of the mechanism according to the tenth embodiment, and FIG. 20 is a longitudinal cross-sectional view of the mechanism according to the second invention. , FIG. 21 is a plan view of the sliding member, FIG. 22 is a side view of the mechanism according to the second invention, FIG. 23 is a plan view of the fixed body, FIG. 24 is a plan view of the driven rotating body, and FIG. 25 is a side view of the mechanism according to the second invention. FIG. 26, which is a vertical sectional view of the driven rotating body, is a plan view of a conventional ratchet mechanism. In addition, 1 in the drawing is a case, 4, 4a, 4b, 2
4, 31, 37, 39, 42 are driving members, 5 is a driven rotating body, 5a is a rotating shaft, 6, 28, 41 are rotating bodies, 7 is a fixed body, 8 is a through hole, 9 is a magnet pin, 1
0, 11, 15, 16, 17, 18, 47, 4
8 and 49 are magnets, 12 is a recess, 13 is an operating piece, 1
4a, 14b, 14c are limit switches, 44
is a slide member, 46 is a long hole, and 50 is a groove.

Claims (1)

[Scope of Claims] 1. A fixed body is stacked on one side of a rotating body and a driven rotating body is stacked on the other side, and the fixed body has a magnet portion whose portion facing the rotating body is a north pole, and a magnet portion facing the rotating body. Magnet parts whose portions are S poles are provided spaced apart or adjacent to each other in the circumferential direction, and the rotating body is provided with through holes that open in both the surface facing the fixed body and the surface facing the driven rotating body, A magnet pin is slidably inserted into this through hole, and a plurality of recesses into which the magnet pins are fitted when protruding from the through hole are provided between the magnet parts on the surface of the driven rotating body facing the rotating body. An intermittent rotation mechanism characterized in that the intermittent rotation mechanism is formed in the circumferential direction at intervals equal to the intervals of. 2. A fixed body is stacked on one side of the sliding member and a driven rotary body is stacked on the other side, and the fixed body has a magnet portion whose opening to the sliding member is a north pole, and a portion facing the sliding member is a south pole. The magnet portions are provided spaced apart or adjacent to each other in the circumferential direction, and the slide member is provided with a long hole that opens on both the surface facing the fixed body and the surface facing the driven rotating body, and the magnet portion is provided in the long hole. A pin is loosely fitted into the driven rotary body, and an annular groove is formed in the surface of the driven rotating body facing the slide member, into which one end of the magnet pin is engaged, and the magnet pin is fitted into the annular groove when the magnet pin protrudes. An intermittent rotation mechanism characterized in that a plurality of recesses are formed at intervals equal to the intervals between the magnet parts.