JP6421085B2 - Tricycle brake mechanism - Google Patents

Description

  The present invention relates to a tricycle brake mechanism for braking a front wheel of a front two-wheel tricycle or a rear wheel of a rear two-wheel tricycle.

  The front two-wheel tricycle with two front wheels arranged in parallel can provide a loading space between the front two wheels and can support the load with the front two wheels compared to two front and rear two-wheeled vehicles. It has the advantage of being able to suppress wobbling and rollover even when stationary or running at low speed, and has high steering stability even when a front basket or an infant seat is attached to the handle. In addition, even if the road surface is inclined, etc., it is difficult to fall down when it is stopped, excellent in straight running performance, easy to speed up, small turning on a curve, stable turning, etc. It also has.

  In the case of a front two-wheel tricycle, one of the left and right brake levers is a brake lever for the front two wheels, and the other is a brake lever for the rear wheels. In the case of a rear two-wheel tricycle, one of the left and right brake levers Is the brake lever for the rear two wheels, and the other is the brake lever for the front wheels.

  Here, Patent Document 1 discloses a technique related to a brake device for a three-wheeled bicycle. Specifically, in a three-wheeled bicycle brake device in which the left and right rear wheel brake wires for operating the brakes of the rear two wheels are connected to the main rear wheel brake wire via the balance piece, the balance piece and the left and right rear wheel brakes are provided. A stopper is fixed between the outer of the wire. With this configuration, it is possible to easily and accurately evenly adjust the inner stroke with respect to the outer of the left and right rear wheel brake wires with the balance piece in contact with the stopper.

  The balance piece disclosed in Patent Document 1 is sometimes referred to as “Yajirobei”. By the way, the load that the occupant feels when pulling the brake lever varies depending on the grip strength of the occupant, so in some conventional tricycles where the load when pulling the brake lever is uniform, some occupants feel that the load is too large. On the other hand, some passengers feel that the load is too low.

  Therefore, although it is desired to develop a brake mechanism in which the load received when the brake lever is pulled can be easily set according to the occupant, for example, a mechanism including a balance piece disclosed in Patent Document 1 does not have such a load. It is difficult to set easily.

Japanese Patent Laying-Open No. 2005-067558

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a brake mechanism for a tricycle that can easily set a load received when the brake lever is pulled.

  In order to achieve the above object, the brake mechanism for a tricycle according to the present invention comprises an arm having a brake shoe that can come into contact with the rim of each of the front wheel of the front two-wheel tricycle or the rear wheel of the rear two-wheel tricycle. A first brake that communicates with the brake lever on one side of the lever member's rotation shaft. A wire is attached, and two second brake wires respectively connected to the two brakes are attached to the other side of the rotating shaft.

  The brake mechanism of the tricycle of the present invention is a mechanism for braking operation by applying a lever member using the lever principle as a mechanism for braking the two wheels of the front wheel of the front two-wheel tricycle or the rear wheel of the rear two-wheel tricycle. It is possible to set a desired load on the passenger.

  More specifically, in the lever member, either the position of one of the first brake wire attachment point leading to the brake lever and the second brake wire attachment point leading to the brake, which are opposite to each other around the rotation axis, or By setting both positions as desired, it is possible to set a desired load during brake operation.

  In addition, a preferred embodiment of the bicycle brake mechanism according to the present invention includes a distance L1 between the first brake wire attachment portion and the rotation shaft in one lever piece, and the second brake wire attachment portion and the rotation shaft in one lever piece. Further, changing means for changing one or both of the distances L2 is further provided.

  The brake mechanism according to the present embodiment includes a changing means for changing the attachment position of the brake lever or the wire leading to the brake to the lever member, so that the load received when the brake lever is pulled can be freely changed. It is possible.

  Based on the lever principle, increase the distance L1 between the first brake wire attachment point leading to the brake lever and the rotating shaft, or shorten the distance L2 between the second brake wire attachment point leading to the brake and the rotating shaft. This reduces the load on the passenger. Conversely, the load received by the occupant is increased by shortening the distance L1 or increasing the distance L2.

  Here, as an embodiment of the lever member, for example, two kinds of forms can be mentioned.

  One form of the changing means includes one or both of a plurality of first brake wire attachment locations provided on one lever piece and a plurality of second brake wire attachment locations provided on one leverage piece. It is a form.

  A plurality of first brake wire attachment points are provided on one side of the rotation shaft, and a plurality of second brake wire attachment points are provided on the other side of the rotation shaft. By attaching the first brake wire to the location and attaching the second brake wire to the location where the distance L2 is the shortest, the load acting on the occupant is minimized. On the other hand, the load acting on the occupant is maximized by attaching the first brake wire to the attachment location where the distance L1 is the shortest and attaching the second brake wire to the attachment location where the distance L2 is the longest.

  A comfortable brake operation can be realized by attaching the first brake wire and the second brake wire to an attachment location that is an optimal load for the occupant from among the attachment locations. In addition, when another occupant uses a tricycle, the attachment location of each brake wire may be changed so that the load is favorable for the other occupant.

  Moreover, the other form of a change means is a form which consists of a slide part which slides any one or both of a 1st brake wire attachment location and a 2nd brake wire attachment location in one lever piece.

  The changing means of the present embodiment is configured such that each brake wire attaching portion is slidable instead of providing a plurality of each brake wire attaching portion, and each brake wire attaching portion slides when the distance from the rotating shaft is changed. It is what is executed.

  According to this changing means, it is possible to perform delicate adjustment of the load during the brake operation by gradually moving the slide portion.

In a preferred embodiment of the brake mechanism for a bicycle according to the present invention, the other lever piece is provided with a rotation member that is rotatable relative to the other lever piece and has two arms. Yes, the outer parts of the two second brake wires leading to the two brakes are attached to the two second brake wire attachment locations on one lever piece, and the respective inner parts are attached to the respective arm portions of the rotating member. It is what.

  In front and rear two-wheeled tricycles, it is desirable that the two left and right brakes operate simultaneously, but one brake is relatively loose during the use of the bicycle, and only the other brake works first. Problems can occur.

  When only one brake wire is pulled in this way, the brake mechanism of the present embodiment automatically pulls the other brake wire and automatically (naturally) pulls the left and right brake wires. In order to adjust it to the extent (absorbing the variation in the left and right brakes), it is provided with a rotating member that is rotatable relative to the other lever piece and has two arms. The outer parts of the two second brake wires are attached to one lever piece, and the respective inner parts are attached to the respective arm portions of the rotating member. With this configuration, for example, when the pulling amount of the right brake wire is large, the rotating member naturally rotates in the direction of increasing the pulling amount of the left brake wire. By automatically (naturally) rotating the rotating member, the pulling amounts of the left and right brake wires can be adjusted to the same extent.

  Here, as a specific form of the rotating member having two arm portions, the rotating member has a T-shape and the left and right projecting portions are arm portions, Examples include a Y-shaped shape, and a protruding portion in the left and right inclined directions is an arm portion.

  As can be understood from the above description, according to the brake mechanism of the tricycle according to the present invention, the lever member is applied as a mechanism for braking the front two wheels or the rear two wheels of the tricycle, so that the load received when the brake lever is pulled is applied. It can be set easily.

1 is a perspective view simulating an entire front two-wheel tricycle equipped with a front two-wheel fixing mechanism of the present invention. It is the front view which looked at the front two-wheeled type tricycle from the front. It is the figure which looked at the front two-wheel type tricycle from the front diagonal, and expanded and showed Embodiment 1 of a lever member. (A), (b) is the schematic diagram which showed Embodiment 2 and 3 of a lever member. It is the schematic diagram which showed Embodiment 4 of the lever member. It is the figure which expanded the lock part, Comprising: It is the figure which showed the state by which the lock part was cancelled | released. It is the figure which expanded the lock part, Comprising: It is the figure which showed the state in which the lock part is operated. It is the perspective view which looked at the steering shaft fixing | fixed part from diagonally forward. It is the perspective view which looked at the steering shaft fixing | fixed part from diagonally backward. It is the perspective view which looked at the tilting arm fixing | fixed part from diagonally forward.

  Embodiments of a brake mechanism for a tricycle according to the present invention will be described below with reference to the drawings. Although the illustrated three-wheeled vehicle is a front two-wheeled three-wheeled vehicle, it goes without saying that the brake mechanism of the present invention can be applied to the rear two-wheeled three-wheeled vehicle. Although the illustrated example shows a brake having a structure for braking the rims of two wheels, it goes without saying that the brake applied in the brake mechanism of the present invention may be a drum brake or a disc brake.

(About the front motorcycle type tricycle)
FIG. 1 is a perspective view simulating the entire front two-wheel tricycle, and FIG. 2 is a front view of the front two-wheel tricycle viewed from the front.

  In the illustrated front two-wheeled tricycle 10, a head pipe 1c is connected to the front of a main pipe 1d constituting a frame body, a vertical pipe 1e is connected to the rear of the main pipe 1d, and a right handle 1a and a left handle 1aa are attached. The steering shaft 1b is rotatably fitted to the head pipe 1c, and two front two wheels 2A and 2B are attached to the steering shaft 1b via the tilting arm 4, and the chain 1i is rotated by depressing the pedal 1h. A rear wheel 2C to which a driving force is transmitted via is attached, and the whole is roughly configured. The illustrated front two-wheeled tricycle 10 is an electric assist tricycle equipped with an electric assist unit including a battery 1j.

  A seat post 1f is attached to the vertical pipe 1e so as to be movable up and down, and a saddle 1g is connected to the top of the seat post 1f.

  The right handle 1a and the left handle 1aa attached to the steering shaft 1b are configured to extend laterally, then stand up right and extend to the occupant side, and the right handle 1a includes brakes for the front two wheels 2A and 2B. A lever 1a ′ is attached, and a brake lever 1aa ′ for the rear wheel 2C is attached to the left handle 1aa. A front basket 1k is disposed in the space between the right handle 1a and the left handle 1aa and immediately above the front two wheels 2A and 2B (the front basket 1k shown is a basket for an infant seat, One example).

  The rising pipe of the right handle 1a is composed of a lever for locking when the rotation of the steering shaft 1b (Z1 direction) and the movement of the tilting arm 4 on the curved locus (Z2 direction) are fixed simultaneously or almost simultaneously. The locked portion 6 is attached.

  Since the lock portion 6 is attached to the middle position of the handle 1a, the occupant can extend his hand and fix the steering shaft 1b and the tilt arm 4 in an emergency.

  The front two wheels 2A and 2B are each attached with a U-shaped fork 1p that is connected to the wheel shaft of each front wheel 2A and 2B and straddles the upper part of the front wheels 2A and 2B, and constitutes a tilt arm 4 with respect to the left and right forks 1p. The upward tilting arm 4A and the downward tilting arm 4B are connected to each other via a rotating shaft so as to be freely rotatable. Note that the upper tilt arm 4A and the lower tilt arm 4B are connected to the connection arm 4D so as to be rotatable at their center positions.

  Therefore, when the front two-wheel tricycle 10 is tilted, the upper tilt arm 4A and the lower tilt arm 4B move on the curved locus, and the left and right forks 1p tilt, whereby the front two wheels 2A and 2B are tilted.

  As shown in FIG. 2, a ring-shaped disc 4C protruding upward is fixed to the upward tilting arm 4A, and this disc 4C is fixed (locked) by a tilting arm fixing portion described in detail later. It is like that.

  One arm 3b of the two arms 3a and 3b that constitute the brake 3 is connected to the left and right forks 1p across the front wheels 2A and 2B. The two arms 3a and 3b are connected to each other directly above the front two wheels 2A and 2B via a rotating shaft, and a brake shoe 3c is attached to the inside of the tip of each arm 3a and 3b. 3c slides on the rims 2A ′ and 2B ′ of the front wheels 2A and 2B to execute braking. The brake 3 and the lever member 5 that drives the brake 3 constitute a brake mechanism 30 that will be described in detail later.

  A lever member 5, which will be described in detail later, is attached to the connection arm 4 </ b> D constituting the tilt arm 4, and a first brake wire 9 a leading to the brake lever 1 a ′ for the front two wheels is attached to the tip of the lever member 5. The second brake wires 9b that are respectively connected to the two brakes 3 are attached to two positions on the rear side (rear wheel side) of the lever member 5.

(About brake mechanism)
Embodiments 1 to 4 constituting the brake mechanism will be described in detail with reference to FIGS. Here, FIG. 3 is a view showing the front of the front two-wheeled tricycle from an angle, and is an enlarged view of Embodiment 1 of the lever member. FIGS. 4 (a) and 4 (b) are respectively lever members. FIG. 5 is a schematic diagram showing Embodiments 2 and 3, and FIG. 5 is a schematic diagram showing Embodiment 4 of the lever member.

<Embodiment 1 of lever member and brake mechanism>
As shown in FIG. 2, the brake mechanism 30 includes a brake 3 and a lever member 5. As shown in FIG. 3, the upper and lower upper lever 5a (lever piece) and lower lever 5b (lever piece) are assembled so as to be rotatable around the rotation shaft 5c (rotating in the X1 direction). Motion), a first brake wire attachment point 5d is provided in front of the upper lever 5a (a forward direction of the tricycle), and a pair of second brake wire attachment points 5e is provided at the rear end of the upper lever 5a. It is.

  The tip of the outer 9a ′ (wire) of the first brake wire 9a is attached to the first brake wire attaching portion 5d, and the inner 9a ″ (wire) protruding from the outer 9a ′ is the tip of the wire on the lower lever 5b. It is clamped and fixed by the fixing portion 5f.

  By operating the brake lever 1a ', the lever member 5 moves like a clothespin, with the upper lever 5a and the lower lever 5b rotating around each other about the rotation shaft 5c.

  A block body 8c is attached to the connection arm 4D behind the lever member 5, and a tilt arm fixing portion 8a, which will be described in detail later, is attached below the block body 8c, and above the block body 8c. A steering shaft fixing portion 7, which will be described later in detail, is attached. A front two-wheel fixing mechanism 20 is configured by the steering shaft fixing portion 7 and the tilt arm fixing portion 8a.

  By applying the lever member 5 shown in the figure, it is possible to set a desired load applied to the occupant during the brake operation using the principle of the lever. That is, by appropriately setting the distance L1 from the rotating shaft 5c to the first brake wire attachment point 5d and the distance L2 from the rotating shaft 5c to the second brake wire attachment point 5e, the load on the occupant can be set as desired. Become.

<Embodiment 2 of Lever Member and Brake Mechanism>
In the lever member 5A constituting the brake mechanism 30A shown in FIG. 4A, three first brake wire attachment points 5d ′ are provided in front of the upper lever 5a (the forward direction of the tricycle). Two sets of second brake wire attachment points 5e ′ are provided at the rear end.

  By providing three first brake wire attachment points 5d ′ and two sets of second brake wire attachment points 5e ′, the first brake wire attachment point 5d ′ and / or the second brake wire attachment point from the rotary shaft 5c. The distance to 5e 'can be changed freely (the plurality of brake wire attachment points 5d' and 5e 'are changing means).

  Regarding the first brake wire attachment location 5d ′, the distances from the rotation shaft 5c are L1, L1 ′, and L1 ″ in order from the rotation shaft 5c, respectively. The distances from the rotating shaft 5c are L2 and L2 ′, respectively, in the order from 5c.

  Thus, by providing a plurality of first brake wire attachment locations 5d ′ and second brake wire attachment locations 5e ′ that are different in distance from the rotation shaft 5c, it is given to the occupant when operating the brake lever 1a ′. It becomes possible to adjust the degree of load.

  For example, by setting the first brake wire attachment location 5d ′ at the location of the longest distance L1 ″ from the rotation shaft 5c and setting the second brake wire attachment location 5e ′ at the location of the shortest distance L2 from the rotation shaft 5c. Due to the lever principle, the load when the occupant operates the brake lever 1a 'is minimized, conversely, the first brake wire attachment point 5d' is set at a distance L1 from the rotary shaft 5c, and the second brake By setting the wire attachment location 5e ′ at a distance L2 ′ from the rotating shaft 5c, the load when the occupant operates the brake lever 1a ′ is maximized.

  By providing the brake mechanism 30, it is possible to set the first brake wire attachment location 5d ′ and the second brake wire attachment location 5e ′ at a position where the occupant receives an appropriate load according to the degree of load felt by the occupant. become. Note that the radix of the first brake wire attachment location 5d ′ and the second brake wire attachment location 5e ′ and the distances from the respective rotation shafts 5c are not limited to the illustrated example, and various forms are applicable. .

<Embodiment 3 of Lever Member and Brake Mechanism>
The lever member 5B constituting the brake mechanism 30B shown in FIG. 4 (b) has a first brake wire attachment portion 5d as a changing means fixed to the slide portion 5g, and a slide groove 5a ′ opened in the upper lever 5a. The slide portion 5g slides inside (X2 direction), so that the distance L1 between the first brake wire attachment portion 5d and the rotary shaft 5c can be appropriately changed.

  The slide groove 5a 'is provided with slits 5a "on the left and right groove walls, and the tip of the pin 5g' protruding to the side of the slide part 5g is fitted into the slit 5a" and can be fixed at an appropriate place. Yes.

  In addition, although illustration is abbreviate | omitted, the 2nd brake wire attachment location 5e may also be comprised by the slide part so that sliding is possible. Further, the first brake wire attaching portion 5d may be slidable as in the illustrated example, and the second brake wire attaching portion 5e may be provided at a plurality of locations as shown in FIG.

<Embodiment 4 of Lever Member and Brake Mechanism>
In the brake mechanism 30C, when one inner wire is slightly extended from the other inner wire due to use, or one of the brake shoes of the left and right brakes is worn more than the other, the brake wire 30C A brake mechanism that can automatically (naturally) adjust the pulling amount of the left and right brake wires to the same extent (absorb the variation in the left and right brakes) when there is a difference in the pulling allowance. is there. Since the left and right adjustment errors can be absorbed in this way, there is no need to adjust the left and right exactly.

  A lever member 5C constituting the brake mechanism 30C shown in FIG. 5 is provided with a rotating member 5h that is rotatable relative to the lower lever 5b (W1 direction) behind the lower lever 5b. The rotating member 5h has a Y-shape, and includes two arm portions 5h 'protruding in the left and right tilt directions.

Outer portions 9b 'of two second brake wires 9b communicating with the two brakes are attached to the two second brake wire attachment portions 5e of the upper lever 5a, and the inner portions 9b "of each of the arm portions of the rotating member 5h. It is attached to 5h '.

  With this configuration, for example, when the pulling amount of the right brake wire 9b is large, the rotating member 5h naturally rotates in the direction of increasing the pulling amount of the left brake wire 9b. By the automatic (natural) rotation of the rotating member 5h, the pulling amounts of the left and right brake wires 9b can be adjusted to the same level.

  Although illustration is omitted, it goes without saying that a lever member in which both the changing means shown in FIG. 4 and the rotating member shown in FIG. 5 are combined and a brake mechanism including this lever member may be used. is there.

(Front two-wheel fixing mechanism)
The front two-wheel fixing mechanism 20 shown in FIG. 3 fixes the steering shaft fixing portion 7 that fixes the rotation of the steering shaft 1b and the movement of the tilting arm 4 on the curved locus so that the front two wheels 2A and 2B have a predetermined tilt posture. It is comprised from the tilting arm fixing | fixed part 8a to hold | maintain. Hereinafter, the lock portion 6 for fixing the steering shaft fixing portion 7 and the tilt arm fixing portion 8a, the steering shaft fixing portion 7, and finally the tilt arm fixing portion 8a will be described with reference to FIGS.

<About the lock section>
FIG. 6 is an enlarged view of the lock portion, showing a state where the lock portion is released, and FIG. 7 is a view showing a state where the lock portion is being operated.

  The lock portion 6 includes a gear 6a attached to the rising pipe of the right handle 1a and a lever 6b on which an engaging portion 6c is rotatably mounted.

  At the end of the lever 6b, a steering wire 9c leading to the steering shaft fixing portion 7 and a tilting arm wire 9d leading to the tilting arm fixing portion 8a are attached, and the upper ends of the respective wires 9c and 9d extend to the upper gear 6a. It is fixed. A timing adjuster (not shown) is interposed in the middle of the steering wire 9c so as to adjust the simultaneous pulling timing of the steering wire 9c and the tilt arm wire 9d.

  In the state of the lock portion 6 shown in FIG. 6, both the steering shaft fixing portion 7 and the tilt arm fixing portion 8a are unlocked. Therefore, the steering shaft 1b is free to rotate, and the tilt arm 4 is on a curved locus. Can be moved freely.

  As shown in FIG. 6, after pulling the engaging portion 6c downward (Y1 direction) to release the engagement of the engaging portion 6c with the gear 6a, the lever 6b is lifted upward (Y2 direction). As shown, the engaging portion 6c is engaged with the gear 6a when the lever 6b is pulled up. As a result, the steering wire 9c and the tilt arm wire 9d are pulled down at the same time, and the steering shaft fixing portion 7 and the tilt arm fixing portion 8a constituting the front two-wheel fixing mechanism 20 are simultaneously fixed by simultaneously pulling both the wires 9c and 9d. Or substantially simultaneous fixation is achieved. Depending on the form of the engaging portion, the initial disengagement may not be necessary.

<About the steering shaft fixing part>
FIG. 8 is a perspective view of the steering shaft fixing portion as viewed obliquely from the front, and FIG. 9 is a perspective view of the steering shaft fixing portion as viewed from the oblique rear.

  The steering shaft fixing portion 7 is composed of two arms 7a and 7b that are rotatable about a rotation shaft 7c and that have pads (not shown) on the inside. One end of each of the two arms 7a and 7b is fixed to the rotating shaft 7c, and the other end of each of the two arms 7a and 7b is fixed by abutting the outer end of the steering wire 9c against the arm 7b. The inner is fixed to the arm 7a, and both arms 7a and 7b are disposed with the head pipe 1c interposed therebetween.

  The rotating shaft 7c is provided with a spring 7g. When the steering shaft 1b is rotatable, the two arms 7a and 7b are positioned away from the steering shaft 1b by the bias of the spring 7g. Yes.

  A through hole 7e is formed at the other end of the arm 7b, and a holding part 7f that sandwiches the inner side of the steering wire 9c is provided at the other end of the arm 7a. The steering wire 9c is inserted into the through hole 7e, and the holding part 7f The inner is pinched.

  When the inner part is pulled with respect to the outer side of the steering wire 9c by the operation of the lock part 6, the two arms 7a and 7b are resisted against the bias of the spring 7g according to the movement of the steering wire 9c, and the rotating shaft 7c. The steering shaft 1b is fixed by sandwiching the head pipe 1c through the pad.

<About tilting arm fixing part>
FIG. 10 is a perspective view of the tilt arm fixing portion as viewed obliquely from the front.
The tilt arm fixing portion 8a is composed of a disc caliper 8b to which the tip of the tilt arm wire 9d is fixed. A projection (for example, a pad) (not shown) is provided at the tip of the disc caliper 8b. A disk 4C protruding upward from the upward tilting arm 4A is disposed at the tip position of the disk caliper 8b.

  When the lock portion 6 is operated and the inner side of the tilting arm wire 9d is pulled, the disc caliper 8b is operated according to the movement of the tilting arm wire 9d.

  In a state where the lock portion 6 is released, the disc caliper 8b does not sandwich the disc 4C. Then, when the disk caliper 8b is rotated by the operation of the lock unit 6, the position of the protrusion is changed to be in sliding contact with the disk 4C, and the entire tilt arm 4 is fixed by fixing the disk 4C.

  According to the illustrated front two-wheel fixing mechanism 20, both the steering shaft 1b to which the handles 1a and 1aa are attached and the tilting arm 4 that tilts the front two wheels 2A and 2B are fixed in synchronization by operating the lock portion 6. The two types of movement of the front two wheels 2A and 2B, rotation and tilt, can be fixed (locked) at the same time or almost simultaneously, and the front two-wheel tricycle 10 can be stably stopped at the three points of the front two wheels 2A and 2B and the rear wheel 2C. It becomes possible to hold it. Therefore, by operating the lock portion 6, it is possible to park the heavy two-wheeled tricycle 10 that is in contact with the ground at three points while maintaining its standing posture.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

  1a ... right handle, 1aa ... left handle, 1a ', 1aa' ... brake lever, 1b ... steering shaft, 1c ... head pipe, 1d ... main pipe, 1e ... vertical pipe, 1f ... seat post, 1g ... saddle, 1h ... Pedal, 1i ... Chain, 1j ... Battery, 1k ... Front basket, 1p ... Hawk, 2A, 2B ... Front wheel (front two wheels), 2C ... Rear wheel, 3 ... Brake, 3a, 3b ... Arm, 3c ... Brake shoe, 4 ... tilting arm, 4A ... up tilting arm, 4B ... down tilting arm, 4C ... disc, 4D ... connecting arm, 5, 5A ... lever member, 5a ... upper lever (lever piece), 5b ... lower lever (lever piece), 5c: Rotating shaft, 5d, 5d '... First brake wire attachment location (changing means), 5e, 5e' ... Second brake wire attachment location (changing means), 5f ... Wire tip fixing Fixed portion, 5g ... slide portion (changing means), 5h ... rotating member, 5h '... arm portion, 6 ... lock portion, 6a ... gear, 6b ... lever, 6c ... engaging portion, 7 ... steering shaft fixing portion, 7a, 7b ... arm, 7c ... rotating shaft, 7e ... through hole, 7f ... clamping part, 7g ... spring, 8a ... tilting arm fixing part, 8b ... disc caliper, 8c ... block body, 9a ... first brake wire, 9b ... second brake wire, 9c ... steering wire (wire), 9d ... tilting arm wire (wire), 10 ... front two-wheel tricycle, 20 ... front two-wheel fixing mechanism, 30, 30A ... brake mechanism

Claims (5)

Two brakes composed of arms with brake shoes that can freely come into contact with the rims of the front wheels of the front two-wheel tricycle or the rear wheels of the rear two-wheel tricycle,
A lever member composed of two lever pieces that are rotatable around a rotation axis, and a first brake wire leading to the brake lever is attached to one side of the rotation axis of the lever member. A brake mechanism for a tricycle, in which two second brake wires that respectively connect to two brakes are attached to the other side.   Changing means for changing one or both of the distance L1 between the first brake wire attachment location on one lever piece and the rotating shaft, the distance L2 between the second brake wire attachment location on one lever piece and the rotation shaft, The brake mechanism for a tricycle according to claim 1, further comprising:   The changing means includes one or both of a plurality of first brake wire attachment points provided on one lever piece and a plurality of second brake wire attachment points provided on one lever piece. The tricycle brake mechanism described in 1.   3. The tricycle brake mechanism according to claim 2, wherein the changing means includes a slide portion that slides one or both of the first brake wire attaching portion and the second brake wire attaching portion in one lever piece. The other lever piece is provided with a rotation member that is rotatable relative to the other lever piece and has two arms,
The outer parts of the two second brake wires leading to the two brakes are attached to the two second brake wire attachment locations on one lever piece, and the respective inner parts are attached to the respective arm portions of the rotating member. The brake mechanism for a tricycle according to claim 1.

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