JPH05193546A - Application of brake to motorcycle and device therefor - Google Patents

Abstract

PURPOSE:To suppress the frictional noise and lighten the load by applying an urging force in the rim separation direction which is stronger on one arm between a pair of arms for holding a brake shoe than for the other arm, and applying a repulsive urging force to the other by restraining the pivotal movement of the arm by a stopper, and separating both the shoes from the rim. CONSTITUTION:A brake is equipped with a C-arm 2 and Y-arm 6 and is urged by a spring 11 so as to urge the Y-arm 6 stronger than the C-arm 2. Further, a stopper 10 is installed inside the Y-arm 6 and restrains the pivotal movement in the rim separating direction of the C-arm 2 at a specified position. Since, with this constitution, the repuesive force of an operation part 11B on the Y-arm 6 side is strong in brake application, the C arm 2 turns first towards a rim 14. When brake is releaed, the shoe 7 at the extension edge 6b of the Y-arm 6 is separated from the rim 14, and the extension edge 6b touches with the projection 10c of the stopper 10. Accordingly the repulsive force of the Y-arm 6 acts on the C-arm 2, and the shoe 7 of the C-arm 2 is separated from the rim 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-wheeled vehicle brake braking system and method for surely separating left and right shoes from a rim when braking is released.

[0002]

2. Description of the Related Art As a bicycle brake, a side pull type brake, a center pull type brake, a cantilever type center pull brake, etc. are known. In either case, the direction of return is set via a brake wire by operating a brake lever. The pair of arms urged against each other pivot around the mounting bolts, and the brake shoes provided at each end are displaced in the direction of pinching the wheel rim or in the direction of separating them, thereby braking or releasing the wheel. I'm doing it. In order to perform such braking, it is preferable that the tips of the brake shoes provided on each arm be equally spaced from the surfaces of the rims that face each other during braking standby. Therefore, the position of the brake shoe of each arm to which the brake wire is attached is separated from the rim for a predetermined time, and a mounting bolt serving as a pivot is fixed to the bicycle frame, and then the brake wire is connected to the arm. Here, in the center pull type brake, the cantilever type center pull brake, etc., it is difficult to set the left and right arms uniformly with the rim sandwiched because the arms are individually pivotally attached to the frame and the brake wires are connected to each. is there. On the other hand, in the side-pull type brake, it is easy to set the left and right arms evenly, but the tip of the left and right brake shoes may differ from the rim due to actual mounting errors. Therefore, conventionally, a part of the spring material attached to the arm is deformed to change the return repulsive force, and the distance between the left and right brake shoes is adjusted. However, since the return repulsive force by the spring material acts on each arm individually, if the return repulsive force is strong or weak, the brake shoe attached to the arm with the weak return repulsive force of the spring material approaches the rim during braking. Then, the brake shoe attached to the strong arm approaches the rim side.
Then, the brake shoes sequentially abut against the rim and pinch from both sides. On the contrary, when releasing the brake, the brake shoe of the arm with strong return repulsion force first separates from the rim,
Then, the brake shoe of the arm having a weak return repulsion force separates from the rim. Therefore, when the return repulsive force on one side of the spring material is fairly weak, the brake shoe of the arm on the side where it is hooked does not separate from the rim while colliding with the rim, and friction noise is generated even during normal running. However, there is a drawback that problems such as load are applied.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention was devised in view of the above circumstances.
By setting the return repulsive force of one of the left and right arms stronger than the other, causing a time difference in the pivoting motion of the arm in the braking release direction,
Provided is a brake braking device for a motorcycle and a method thereof, in which an arm separated from a rim side is restrained first and a return repulsive force acting on the arm is applied to all arms separated from the rim side from the other side. Especially. A second object of the present invention is to provide a side-pull type brake device in which the same repulsive force acts on a pair of arms.

[0004]

In order to solve the above-mentioned first problem, in the invention of claim 1, a pair of left and right arms that respectively hold the brake shoes and are pivotally attached to the frame of the motorcycle, and the arms are provided. In a two-wheeled vehicle brake braking method that includes a spring body that is biased in the braking release direction by a repulsive force, (A-1) one arm is biased more strongly than the other arm, and the strongly biased arm is braked. Provide a stopper to restrain at a predetermined position in the release direction. (A-2) When releasing brake braking, move the brake shoe of one arm that is strongly urged away from the rim before the other, (A-3) Attach strongly When one of the urged arms returns to a predetermined position in the braking release direction, the pivotal movement of the arm is restrained by a stopper, and (A-4) the other arm is returned to the return position. ..

According to the second aspect of the invention, a pair of left and right arms that respectively hold the brake shoes and are pivotally attached to the frame of the two-wheeled vehicle, and a spring body that urges the arms in the braking release direction by a repulsive force. In the two-wheeled vehicle brake braking device, (B-1) the spring body is set to bias the other arm more strongly than the one arm, and (B-2) the strongly biased arm is set by the biasing force. At the time of returning, a technical measure is taken to provide a stopper piece for restraining the pivotal movement of the other arm at a predetermined position in the braking release direction before the other arm completes returning.

In order to achieve the second object, according to the invention of claim 6, a pair of left and right arms pivotally attached to a mounting shaft by operating a brake lever is connected to one side of the rims through a brake wire. In the side-pull caliper brake that presses the side surface of the brake to brake the wheel and releases the brake by separating it from the rim by the repulsive force of the spring body provided on the pair of arms, (C-1) The outer wire of the brake wire A technical means of providing a main spring body that repels at the time of compression between the extended end of one connected arm and the extended end of the other arm connected to the inner wire derived from the outer wire of the brake wire is provided. I am taking it. Further, in the invention of claim 8, in addition to the invention of claim 6, (C-2) an auxiliary spring body that repels in a returning direction when the arm is braked is attached to any one of the above arms, (C-3) A technical measure is taken such that an arm provided with an auxiliary spring body is connected to the mounting shaft with a stopper piece for restraining pivotal movement of the arm in a separating direction at a position separated from the rim by a predetermined distance when the brake is released.

[0007]

In the structure for solving the first problem, when the brake wire is pulled during braking, the brake shoe of the arm is pivoted in the rim approaching direction while compressing the spring body. Here, the spring body has one brake arm urging the one arm stronger than the other arm in the rim separating direction. Therefore, during braking, the arm on which the biasing repulsive force acts weakly pivots while compressing the spring body, and the brake shoe of the arm approaches the rim. Then, the arm, which is strongly urged and repelled, pivots while compressing the spring body to bring its brake shoe closer to the rim. Then, each brake shoe abuts the rim with a time lag, and clamps the rim to brake the wheel. Next, at the time of releasing the braking, the arm to which the strong biasing repulsive force acts first separates from the rim. This arm is restrained by a stopper piece at a position separated from the arm by a predetermined distance. As a result, the repulsive force applied to the arm acts on the arm on which the weak biasing repulsive force acts, and the repulsive force acting on the arm increases, so that the arm can be reliably separated from the rim.

Further, in the invention of the constitution for solving the second problem, the main spring body is compressed when the extending end of the arm to which the brake wire is connected approaches during braking. Since the repulsive force applied to the main spring body acts as the same repulsive force on the pair of arms when the braking is released, both arms can return with the same repulsive force. Therefore, when one of the arms returns first, if the arm that returns first is restrained at a predetermined position, the repulsive force of the main spring body will act on the arm that returns from the back of the other arm. It is possible to return to the brake release direction. Therefore, if one arm is provided with an auxiliary spring body, at the time of braking, one arm side not having the auxiliary spring body pivots first while compressing the main spring body, and the brake shoe on the one arm side is pivoted. Approach the rim. Next, the other arm side having the auxiliary spring body pivots while compressing the main spring body and the auxiliary spring body, and the brake shoe on the other arm side approaches the rim. And each brake shoe collides with the rim with a time difference,
The wheels are braked by pinching the rim. Next, when the brake is released, the other arm side having the auxiliary spring body first separates from the rim due to the synergistic effect of the repulsive force of the main spring body and the repulsive force of the auxiliary spring body. The other arm is restrained by a stopper piece at a position separated from the other arm by a predetermined distance. As a result, the repulsive force applied to the other arm acts on the one arm that does not have the auxiliary spring body, the repulsive force acting on the one arm increases, and the arm is reliably separated from the rim. You can

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of an apparatus using the brake braking method of the present invention will be described below with reference to the drawings. 1 and 2 show a preferred embodiment when the present invention is applied to a side pull type brake. This brake is
Mounting bolt 1 that is fixed to the bicycle frame (not shown)
And a pair of left and right arms pivotally attached to the mounting bolt 1, that is, a C arm 2 and a Y arm 6, a spring body 11 for giving a restoring repulsive force to both arms 2 and 6, and one of the arms at a predetermined position. It is composed of a stopper piece 10 which is restrained by. That is, the C-arm 2 has a substantially C-shape in plan view, the center portion is pivotally supported by the mounting bolt 1, the brake shoe 3 is attached to one end 2a, and the tip of the inner wire 4 is attached to the other end 2b. It has a wire fixing mechanism 5 for fixing the parts.

The Y arm 6 has a substantially Y shape in a plan view, a base end 6a is rotatably supported by the mounting bolt 1 inside the C arm 2, and a brake shoe 7 is provided at a lower extending end 6b.
A wire fixing mechanism 9 is attached to the upper extending end 6c for fixing the tip end portion of the outer wire 8 having the inner wire 4 inserted therein. Further, the spring body 11 is
A fitting 1A fixed to the mounting bolt 1 by using a conventionally used linear spring body (glass spring).
Has a pair of winding parts on the left and right of the central straight part held by the arm, and descends while inclining outward and projecting parts 2d, 6 of each arm.
It has action arm parts 11A and 11B which abut against d from the inside. The spring body 11 is set to have a large inclination so that the repulsive biasing force of the one acting arm portion 11A is stronger than that of the other acting arm portion 11B.

In this embodiment, the action arm portion 11B having a strong repulsive biasing force is engaged with the protrusion 6d of the Y arm 6, and the inner wire 4 is pulled when the brake lever (not shown) is operated for braking. The extended end 6c of the Y arm 6 and the C
When the other end 2b of the arm 2 approaches, the coil spring is compressed to increase the repulsive force, and urges the extending end 6c of the Y arm 6 and the other end 2b of the C arm 2 in the separating direction (braking release direction).

The stopper piece 10 has a base end 10a fixed to the mounting bolt 1 inside the Y arm 6 as shown in FIG. 2 or FIG. In this embodiment, the mounting bolt 1
The base end is constrained and held by the fixture fixed to the fixed position. The tip 10b of the stopper piece 10 extends along the inner side surface of one extension end 6b of the Y arm 6, and the tip edge portion of the Y arm 6 is appropriately brought into contact with the upper edge portion of the extension end 6b. It has a protrusion 10c for controlling the rotation in the opening direction within a certain range.

When the side-pull caliper brake having the above structure is mounted on the vehicle body, first, the C arm 2 and the Y arm 6 are pivotally mounted on the mounting bolt 1, and the brake shoe 7 at the extending end 6b of the Y arm 6 is attached. The Y-arm 6 is pivotally attached to the bicycle frame with the mounting bolts 1 with the inward direction of the wheel 13 separated from the rim 14 of the wheel 13 by, for example, about 2 mm. Here, a receiving member 1 for locking the spring body at the center of the mounting bolt 1
A is integrally fixed, and the stopper piece 10 is locked or integrally fixed to the receiving tool 1A.

Next, the inner surface of the brake shoe 3 at one end 2a of the C-arm 2 is also brought closer to the state in which it is separated from the rim 14 of the wheel 13 by, for example, about 2 mm, and then the inner wire 4 is inserted.
The tip end of is fixed by the wire fixing mechanism 5, and the Y arm 6 and the C arm 2 are evenly arranged on the rim 14 of the wheel 13. Therefore, at the time of braking operation, the repulsive force of the working arm portion 11B on the Y arm side is stronger than the repulsive force of the working arm portion 11A on the C arm side, so that the C arm 2 or the brake shoe 3 attached to this is the first. The rim 14 is rotated in the approaching direction.

Next, the Y arm 6 or the brake shoe 7 attached to the Y arm 6 rotates in the direction in which the wheel 13 approaches the rim 14. As a result, the left and right brake shoes 3 and 7 sequentially abut against the rim 14 of the wheel 13 to squeeze the wheel 13 to brake the wheel 13. When you release the brake lever and release the brake,
Since the repulsive biasing force of the working arm portion 11B ′ on the Y arm side is strong, the extending end 6b of the Y arm 6 to the brake shoe 7 are formed.
Is separated from the rim 14 of the wheel 13 first, and the stopper piece 10
The outer edge portion of the extending end 6b comes into contact with the protrusion 10c, thereby stopping the rotation. Therefore, the repulsive force acting on the Y arm acts on the C arm 2 together with the original repulsive force of the C arm 2, and the brake shoe 3 attached to the end 2a of the C arm 2 is removed from the rim 14 of the wheel 13. Be sure to leave and return to the original standby state.

The brake device shown in FIG. 4 to FIG. 6 has arms 2 of substantially the same C shape in front of a gate plate 29 fixed to a frame of a bicycle by a center bolt 1.
2 and 26 are symmetrically stacked, and arm mounting bolts 22A and 26A are attached to the boss portion 29A of the gate-shaped plate 29.
The arms 22 and 26 are pivotally connected by
An engaging element at the end of the pulling wire 24 is connected to the upper extending ends of the pulling wires 2 and 26, and the center of the pulling wire 14 is connected to the triangular fitting 2.
5 shows a different embodiment when applied to a known center-pull type brake in which the triangular metal fitting 25 can be pulled by the brake wire W which is locked to No. 5 and is drawn out from the operation lever.

In this case, the spring bodies 21A and 21B are fitted and inserted into the boss portions 29A and 29B of the gate-shaped plate 29, and the upper ends of the pair are protruded from the gate-shaped plate 29.
9D, the lower ends of which are hooked on the protrusions 22B and 26B formed on the back surfaces of the arms 22 and 26, respectively, and are compressed by the pivoting motion of the arms 22 and 26 to enhance the repulsive force. , The brake shoes 23, 27 attached to the respective arms are urged by a repulsive urging force when the brake is released in the rim separating direction. In this embodiment, the repulsive biasing force of the spring body 21A attached to one arm 22 is stronger than that of the spring body 21B attached to the other arm 26 (the same as the spring body used in the conventional center pull brake). The resilience is set. Further, in the illustrated example, the stopper piece 30 has a cross section of a channel shape and is integrally fixed to the gate-shaped plate 29.
It is possible to collide with 2.

Therefore, also in this case, as in the above embodiment,
Arm 2 with strong repulsive force when braking
The second gear pivots later than the other arms 26 in the direction of approaching the rim 14, and the brake shoes 27 and 23 are pressed in this order to perform braking. Conversely, when the brake is released, the brake shoe 23 first separates from the rim 14 and then the brake shoe 27 separates. At this time, when the arm 22 holding the brake shoe 23 collides with the projection 30c of the stopper piece 30 and the pivotal movement is suppressed, the spring body 1A acting on the arm 22.
The repulsive urging force of the arm acts on the other arm 26,
The arm 26 is strongly pivoted in the separating direction of the rim 14 in cooperation with the repulsive biasing force of the spring body 1B of No. 6, so that the same operation as in the above embodiment can be achieved.

The brake device shown in FIGS. 7 to 9 is composed of cranks in which arms 32 and 36 have the same shape and are symmetrically arranged, and L-shaped metal fittings 33A and 37A to which brake shoes 33 and 37 are attached. Along with the cantilever center bolts 1A 'and 1B', which are pivotally attached to the frame of the bicycle, the outer ends of the cranks 32 and 36 are connected to the engaging elements at the ends of the pulling wire 34, and the center is connected to the triangular metal fitting 38. A different embodiment when applied to a known cantilever type center pull brake in which a triangular metal fitting 38 can be pulled by a brake wire W which is locked and led out from an operation lever is shown.

Also in this case, the spring bodies 31A and 31B are separately attached to the respective arms 32 and 36. In this embodiment, the repulsive biasing force of the spring body 31A attached to one arm 32 is applied to the other arm. It is set stronger than the spring body 31B attached to 36 (the same as the spring body used in the conventional cantilever type center pull brake). Further, the stopper piece 40 is arranged at the rear of the crank 32, and the stopper piece 40 is locked or integrally fixed to a nut-shaped raised portion 35 formed in the middle of the cantilever center bolt 1A ′. Fixed to the frame side of the bicycle. The stopper piece 40 has a projection 40c projecting from the tip thereof, which is capable of colliding with the crank 32, as in the above-described embodiment.

Therefore, also in this case, as in the above embodiment,
During braking, the crank 32, which is strongly affected by the repulsive force, pivots in the direction of approaching the rim 14 later than the other cranks 36, and the brake shoes 37, 33 in this order.
Brakes by pinching. Conversely, when the brake is released, the brake shoe 33 first separates from the rim 14, and then the brake shoe 37 separates. At this time, when the crank 32 holding the brake shoe 33 collides with the protrusion 40c of the stopper piece 40 and the pivoting is suppressed, the repulsive biasing force of the spring body 31A acting on the crank 32 acts on the other crank 36. However, since the crank 36 is strongly pivoted in the direction away from the rim 14, the same operation as in the above-described embodiment can be achieved.

In the above embodiment, a typical brake structure used for a bicycle was illustrated, but the present invention is not limited to the above structure. In short, a structure in which the left and right brake shoes are returned in the braking release direction by an urging force is used. Including everything. Further, the stopper piece abuts against the arm holding the brake shoe and restrains further pivotal movement in the braking release direction, and the shape and the mounting portion are not limited to those in the above embodiment.

Next, a different embodiment in which the main spring body is provided in the side pull type caliper brake will be described. Figure 1
Reference numeral 0 is a plan view of a side-pull caliper brake for a bicycle, in which a mounting bolt 1 fixed to a bicycle body (not shown) and a pair of left and right arms pivotally mounted on the mounting bolt 1, that is, a C arm 2 and a Y arm. 6 and both arms 2,
6, a main spring body 11 for giving a return repulsive force to 6 and an auxiliary spring body 1 for urging one arm (C arm 2 in this embodiment).
2 and a stopper piece 10 for holding the one arm at a predetermined position.

That is, the C-arm 2 is substantially C-shaped in plan view, and the central portion is rotatably supported by the mounting bolt 1, the brake shoe 3 is attached to one end 2a, and the inner wire is attached to the other end 2b. It has a wire fixing mechanism 5 for fixing the tip of the wire 4. The Y arm 6 has a substantially Y shape in a plane, and a base end 6a (see FIG. 12) is rotatably supported by the mounting bolt 1 inside the C arm 2 and is braked at a lower extending end 6b. The shoe 7 is attached, and a wire fixing mechanism 9 for fixing the tip end portion of the outer wire 8 having the inner wire 4 inserted therein is provided at the upper extending end 6c.

The main spring body 11 is composed of a coil spring in which the inner wire 4 is externally fitted between the wire fixing mechanism 5 of the C arm 2 and the wire fixing mechanism 9 of the Y arm 6. , When the inner wire 4 is pulled during braking operation of a brake lever (not shown) and the extending end 6c of the Y arm 6 and the other end 2b of the C arm 2 approach each other, the coil spring is compressed and the repulsive force is increased. Y
The extending end 6c of the arm 6 and the other end 2b of the C arm 2 are urged in the separating direction (braking release direction).

Next, as clearly shown in FIG. 11, one end of the auxiliary spring body 12 is locked in the vicinity of the protrusion 10c of the stopper piece 10, and the other end thereof is the brake shoe attachment extension end 6 of the Y arm 6.
It consists of a coil spring locked near the tip of b. Further, the stopper piece 10 has a base end 10a fixed to the mounting bolt 1 inside the Y arm 6 as shown in FIG. 11 or 12. In the present embodiment, the base end is restrained and held by the fixture fixed to the attachment bolt 1 and fixed at a fixed position.

The tip 10b of the stopper piece 10 has the above-mentioned Y
Extending along the inner side surface of one extending end 6b of the arm 6,
The tip edge is appropriately brought into contact with the upper edge of the extension end 6b, and Y
It has a protrusion 10c for controlling the rotation of the arm 6 in the opening direction within a certain range. When installing the side-pull caliper brake configured as described above to the vehicle body, first, Y
The Y arm 6 is fixed to the mounting bolt 1 and the stopper piece 10 in a state where the inward direction of the brake shoe 7 at the extending end 6b of the arm 6 is separated from the rim 14 of the wheel 13 by, for example, about 2 mm.

Next, the inner surface of the brake shoe 3 at the one end 2a of the C arm 2 is also brought closer to the state in which it is separated from the rim 14 of the wheel 13 by, for example, about 2 mm, and then the inner wire 4 is inserted.
The tip end of is fixed by the wire fixing mechanism 5, and the Y arm 6 and the C arm 2 are evenly arranged on the rim 14 of the wheel 13.

Next, at the time of braking operation, the inner wire 4 is pulled while compressing the main spring body 11, and the other end 2b of the C arm 2 rotates in a direction approaching the extended end 6c of the Y arm 6. At this time, since the extension end 6c of the Y arm 6 is restrained from rotating by the auxiliary spring body 12, the one end 2a of the C arm 2 and the brake shoe 3 attached thereto are initially in the approaching direction of the rim 14. Turn to.

Next, the extending end 6c of the Y arm 6 rotates in the direction of the other end 2b of the C arm 2 against the elasticity of the auxiliary spring body 12, and at the same time, the extending end 6b to which the brake shoe 7 is attached. Rotates in the direction in which the wheel 13 approaches the rim 14. As a result, the left and right brake shoes 3 and 7 sequentially abut against the rim 14 of the wheel 13 to squeeze the wheel 13 to brake the wheel 13.

Next, when the brake lever is released to release the brake, the Y arm 6 is urged more strongly by the repulsive force of the auxiliary spring body 12, so that the extending end 6b of the Y arm 6 is moved to the rim 14 of the wheel 13. First, the outer edge of the extending end 6b comes into contact with the projection 10c of the stopper piece 10, and the rotation is stopped. Therefore, the repulsive force acting on the Y arm acts on the C arm 2 together with the original repulsive force of the C arm 2, and the brake shoe 3 attached to the end 2a of the C arm 2 is removed from the rim 14 of the wheel 13. Surely leave,
Return to the original standby state.

In the above embodiment, the stopper piece 10 is set to Y
Although the example in which the arm 6 is extended in the direction of the extended end 6b has been described, the present invention is not limited to this, and as shown by a chain line in FIG.
The stopper piece 10 may be extended in the direction of the end portion 2a of the C-arm 2 and the auxiliary spring body 12 may be provided between the stopper piece 10 and the one end 2a of the C-arm 2. Further, as shown in FIG. 13, only the stopper piece 10 'may be attached without providing the auxiliary spring body. In this case, the other configurations are similar to those of the above-described embodiment, and therefore, the same reference numerals are given to the same configurations.

Here, the stopper piece 10 'has a pair of left and right protrusions 1 so that both arms 2 and 6 can be restrained.
By providing 0c ′ and 10c ″, it is possible to increase the repulsive force in the return direction and act on the other arm even if either arm 2 or 6 is opened first. Even if one arm separates from the rim side earlier than the other arm due to an error or the like, either protrusion 10
It can be restrained by c ′ or 10c ″ to increase the repulsive force to the other arm as in the above embodiment.

If one of the arms is likely to open earlier in mounting, a stopper piece having only one protrusion for restraining the arm may be provided. Also, the above C
Even with a configuration in which the inner wire 4 is externally fitted between the wire fixing mechanism 5 of the arm 2 and the wire fixing mechanism 9 of the Y arm 6 and the main spring body 11 is provided, the left and right arms 2 and 6 are restored. The repulsive force can be set equally, compared to the case where a conventional spring material is hung over the middle part of the arm,
Effective brake braking or release operation can be performed. In the present invention, the main spring body and the auxiliary spring body are not limited to coil springs, and spring materials can be appropriately used.

[0035]

As described above, according to the braking method and the braking device of the present invention, one of the pair of arms holding the brake shoe is strongly urged in the rim separating direction, and the arm is urged strongly. By providing the stopper for restraining the pivotal movement, the repulsive biasing force is strongly applied to the other arm, so that both brake shoes can be always separated from the rim when the braking is released. In addition, the structure is simple, and it is possible to extremely easily attach the arm, which has been a troublesome work for adjustment in the past, and it is possible to significantly improve the attachment work. It should be noted that, during braking, the left and right brake shoes pinch the rims of the wheels with a slight time difference, but it has been confirmed that there is no effect on the brake braking effect and reliable and stable braking is obtained.

Further, the main spring body that repels at the time of compression between the extension end of one arm connected to the outer wire and the extension end of the other arm connected to the inner wire derived from the outer wire of the brake wire. In the case where the repulsive force is provided, since the same repulsive force is applied to the pair of arms, there is no fear that only the repulsive force applied to one arm will be weakened. In this case, by providing the auxiliary spring body, the repulsive force of one arm is made stronger than that of the other arm, and it is possible to always contact the rim later and separate it from the rim first.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment in which a brake device of the present invention is applied to a side pull type brake.

2 is a side view of the embodiment of FIG. 1. FIG.

FIG. 3 is a plan view of the embodiment of FIG.

FIG. 4 is a perspective view of an embodiment when applied to a center pull type brake.

5 is a front view of the embodiment of FIG.

FIG. 6 is an exploded perspective view of the embodiment of FIG.

FIG. 7 is a perspective view of an embodiment when applied to a cantilever center pull brake.

FIG. 8 is a front view of the embodiment of FIG.

9 is an exploded perspective view of the embodiment of FIG.

FIG. 10 is a front view of a side-pull caliper brake using different main spring bodies.

FIG. 11 is a side view of the same.

FIG. 12 is a plan view showing a part when seen from above.

FIG. 13 is a front view showing another embodiment. 1 ... Mounting bolt 2 ... C arm 3 ... Brake shoe 4 ... Inner wire 5 ... Wire fixing mechanism 6 ... Y arm 7 ...... Brake shoe 8 ...... Outer wire 9 ...... Wire fixing mechanism 10 ・ ・ ・ ・ Stopper piece 11 ・ ・ ・ ・ Main spring body 11 '・ ・ ・ Spring body 11A' One working arm portion 11B ', the other working arm portion 12 ... Auxiliary spring body 13 ... Wheel 14 ... Rim

Claims (8)

[Claims] 1. A pair of left and right arms each of which holds a brake shoe and is pivotally attached to a frame of a motorcycle.
In a brake braking method for a two-wheeled vehicle comprising a spring body that biases the arm in a braking release direction by a repulsive force, one arm is biased more strongly than the other arm, and the strongly biased arm is biased in a braking release direction. When a brake is released, the brake shoe of one arm that is strongly urged is separated from the rim before the other when the brake is released, and the one arm that is strongly urged is released in the predetermined direction. A brake braking method for a two-wheeled vehicle, wherein when the arm is returned to the position, the pivotal movement of the arm is restrained by a stopper and the other arm is returned to the return position. 2. A pair of left and right arms that respectively hold the brake shoes and are pivotally attached to the frame of the two-wheeled vehicle,
In a brake braking device for a two-wheeled vehicle comprising a spring body that biases the arm in a braking release direction by a repulsive force, the spring body is set to bias the other arm more strongly than the one arm, and When the urged arm returns by the urging force, a stopper piece is provided to restrain the pivotal movement of the arm at a predetermined position in the braking release direction before the other arm completes the return. Brake device for motorcycles. 3. The arm comprises a substantially Y-shaped arm and a substantially C-shaped arm, which are overlapped in the front-rear direction and are pivotally attached to the frame of the two-wheeled vehicle by a center bolt at the center, and the brake wires are vertically opposed on one side. A braking device for a two-wheeled vehicle, comprising a side-pull type brake that is connected to the outer ends of the arms and can be pulled. 4. Each arm has the same C-shape and is pivotally attached to a bicycle frame by a center bolt at a midway position thereof, and an end of a brake wire is connected to an outer end of the arm. A braking device for a two-wheeled vehicle, which comprises a center-pull type brake that can be towed in the center. 5. Each arm is composed of a crank of the same shape and is pivotally attached to a bicycle frame by a center bolt together with an L-shaped metal fitting for attaching a brake shoe, and an end of a brake wire is attached to an outer end of the crank. A braking device for a two-wheeled vehicle, which is composed of a cantilever type center pull brake that connects the parts and can be towed in the center. 6. A pair of left and right arms pivotally attached to a mounting shaft is operated by a brake lever to be pressed against the side surface of a rim via a brake wire connected to one side thereof to brake a wheel, and the pair of arms are also provided. In a side-pull caliper brake that releases the brake by separating it from the rim by the repulsive force of the spring body installed in the brake wire, the extended end of one arm connected to the outer wire of the brake wire and the inner wire drawn from the outer wire of the brake wire A brake device for a two-wheeled vehicle, wherein a main spring body that repels at the time of compression is provided between the extended end of the other arm connected to the main spring body. 7. A pair of left and right arms pivotally attached to a mounting shaft is pressed against the side surface of a rim through a brake wire connected to one side of the pair by operating a brake lever to brake a wheel, and the pair of arms is also provided. In a side-pull caliper brake that releases the brake by separating it from the rim by the repulsive force of the spring body installed in the brake wire, the extended end of one arm connected to the outer wire of the brake wire and the inner wire drawn from the outer wire of the brake wire A main spring body that repels at the time of compression is provided between the extended end of the other arm connected to the arm and a pivotal movement of the arm in a direction away from the rim when the brake is released from one or both of the arms. A braking device for a two-wheeled vehicle, wherein a stopper piece for restraining the vehicle is connected to the mounting shaft. 8. A pair of left and right arms pivotally attached to a mounting shaft is operated by a brake lever to press the wheels against a side surface of a rim via a brake wire connected to one side thereof to brake a wheel, and the pair of arms. In a side-pull caliper brake that releases the brake by separating it from the rim by the repulsive force of the spring body installed in the brake wire, the extended end of one arm connected to the outer wire of the brake wire and the inner wire drawn from the outer wire of the brake wire A main spring body that repels at the time of compression is provided between the extended end of the other arm connected to the arm and an auxiliary spring body that repels in the returning direction when the arm is braked is attached to one of the arms. A stopper piece for restraining the pivoting movement of the arm in the separating direction at a position separated from the rim by a predetermined distance when the brake is released is connected to the mounting shaft. A braking device for a two-wheeled vehicle characterized by being formed.