JP5154509B2 - Bicycle brake shoe and brake assembly including the brake shoe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake shoe for a bicycle and a brake assembly equipped with the same in which running safety is not deteriorated in the bicycle even when brakes are quickly applied. <P>SOLUTION: The brake shoe 4 includes a holder 41 for mounting on a brake arm with a fixed end forming a fixed part disposed at intervals from the end side of a wheel rim 21, a pad having a friction surface disposed at intervals from the end side when the brake arm is placed at a normal position, and residing on the fixed part braked by the wheel rim when the brake arm is placed in a position to mechanically brake, and a magnetic unit placed at a normal position when a magnetic force is insufficient to reduce the rotational speed of the wheel rim, disposed at intervals from the end side in which a force gradually generates a magnetic field causing a force of the generated magnetic field to reach a mechanical brake position at the time of braking operation, and generates a sufficient attraction force to reduce the rotational speed of the wheel rim, and mounted on the fixed part to form a magnetic field. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a bicycle brake assembly, and more particularly to a brake shoe capable of delaying or stopping rotation of a wheel rim by friction and a brake assembly including the brake shoe.

  Conventional bicycles usually include a brake assembly that, when applied as a brake, sandwiches a wheel rim with a brake shoe and generates a braking force by friction. This type of brake includes a pair of brake arms pivotally attached to a bicycle frame, and a pair of brake shoes attached to the pair of brake arms so as to face the wheel rim. A brake shoe mounted on the brake arm, which is provided so as to be rotatable with respect to the bicycle frame across the rim, faces the wheel rim from both sides when the brake arm rotates, and the wheel rim is caused by friction with the wheel rim. Delay or stop the rotation of

  However, if a sudden braking is applied to a wheel that is rotating at a high speed, the wheel may be locked and slip or may overturn, which impairs traveling safety.

  The present invention has been made in view of the above problems, and provides a bicycle brake shoe and a brake assembly including the brake shoe, in which the traveling safety of the bicycle is not impaired even when the brake is suddenly applied. Objective.

To achieve the above object, the present invention provides a bicycle wheel comprising a frame body and a wheel having a wheel rim made of a ferromagnetic material having a high magnetic susceptibility and having left and right rim sides surrounding the wheel shaft in the axial direction. A brake assembly for braking the left and right pivot ends mounted so as to be pivotable to the frame body about the left and right pivots at right angles to the axial direction; and The left and right mounting portions extend from the left and right pivot ends on the outside, and when the brake is applied, the left and right mounting portions are separated from the wheel rim from the normal position, and the left and right mounting portions are the wheel rim. The left and right brake arms that move to the position where the brake is mechanically approached and the left and right pivot portions that are spaced apart in the axial direction from the left and right pivot ends are formed. The left and right holders that extend along the left and right vertical lines that are interrupted at the left and right fixed ends that are perpendicular to the axial direction, It has left and right friction surfaces that are spaced from the left and right rim sides when in position, and brake operation is performed on the wheel rim when the left and right mounting parts are in a position to mechanically brake The right and left pads placed on the left and right fixed parts face each other in the axial direction to form a magnetic field, and the force generated by the magnetic field is insufficient to reduce the rotational speed of the wheel rim. Located far from the left and right pivot ends of the position, when the braking operation is performed, enough that the magnetic field can gradually reduce the rotational speed of the wheel rim until it reaches the braking position mechanically It said a large force Generating a wheel rim, and a magnetic unit of the left and right to be placed on the fixed part of the left and right, the magnetic unit, the first and second magnet blocks arranged in each of both sides of the left and right pad The brake assembly is characterized in that the first and second magnet blocks are formed thinner than the left and right pads arranged on the sides thereof.

  In the brake assembly, the first magnet block has a reverse magnetic pole facing each of the wheel rims, and the second magnet block has a reverse magnetic pole facing each of the wheel rims. Is preferred.

The brake assembly includes a magnetic pole of the first magnet block arranged on one side of the left and right pads and a magnetic pole of the second magnet block arranged on the other side of the left and right pads. It is preferable that the magnetic poles are reversed .

The present invention is also a brake shoe for mounting on a brake arm of a bicycle that can be rotated from a normal position of the wheel away from the wheel rim to a position to mechanically brake by approaching the wheel rim. A holder for mounting on a brake arm having a fixed end portion that forms a fixed portion that is spaced from the end side of the wheel rim, and an end side when the brake arm is in a normal position has a friction surface which are spaced between, a pad the brake arm to be placed on the fixed portion to perform a braking operation to the wheel rim when in the position to apply a mechanical braking, the magnetic field is in a normal position when the force generated is insufficient to slow down the rotational speed of the wheel rim, when performing the brake operation, gradually magnetic until a mechanical braking position Magnetic unit but that the are spaced between the sufficiently large force can be dropped the rotational speed of the wheel rim from the end side to be generated in the wheel rim, it is placed on the fixed part to form a magnetic field If, Bei give a, each of the magnetic unit of the left and right, has first and second magnet blocks arranged in each of both sides of the right and left pad, said first and second magnet block, its There is provided a brake shoe characterized in that the brake shoe is formed thinner than the left and right pads arranged on the side .

The brake shoe has a magnetic pole of the first magnet block arranged on one side of the left and right pads and a magnetic pole of the second magnet block arranged on the other side of the left and right pads. It is preferable that the magnetic poles are reversed .

  In accordance with the present invention, a bicycle brake that is operable to generate resistance to the wheel rim before the brake shoe contacts the wheel rim so that the wheel rim can be stably and controllably braked. Assemblies and brake shoes can be provided.

1 is a perspective view of a preferred embodiment of a brake assembly according to the present invention. FIG. 1 is a schematic top view of a preferred embodiment of a brake assembly according to the present invention. FIG. 1 is a schematic front view of a preferred embodiment of a brake assembly according to the present invention. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the component which has the same structure and function, the same number is attached | subjected and the description is abbreviate | omitted.

  1-3, a preferred embodiment of the brake assembly according to the present invention is used with a brake cable 5 for braking the wheel 2 of a bicycle (not shown) with a frame body and wheels (2). It is done.

  The wheel 2 usually includes a wheel rim 21 and a tire surrounding the wheel rim 21, and the wheel rim 21 surrounds the wheel axis in the axial direction and has a left and right rim side part and has a higher magnetic susceptibility. Become.

  The brake assembly includes left and right brake arms 3 and 3 and left and right brake shoes 4 and 4. The left brake arm 3 includes a left pivot end 31 and a left mounting portion 32. The right brake arm 3 includes a right pivot end portion 31 and a right attachment portion 32. The left and right pivot ends 31 are respectively attached to bicycle forks (not shown) located around the left and right pivots. Each of them can be pivoted to the frame body around the pivot axis at right angles to the axial direction of the axle of the wheel 2. The left and right attachment portions 32 extend from the left and right pivot ends 31, 31 outside the wheel rim 21 in the upright direction. As described above, when the brake is applied by the brake cable 5, the left and right attachment portions 32, 32 move from the normal position away from the wheel rim 21 to the position where the brake is mechanically applied toward the wheel rim 21. .

  The left brake shoe 4 includes a left holder 41, a left pad 42, and a left magnetic unit 43. The right brake shoe 4 includes a right holder 41, a right pad 42, and a right magnetic unit 43.

  The left and right holders 41, 41 have left and right studs 413, 413 that are placed on the left and right attachment portions 32, 32 and extend along left and right vertical lines that are interrupted by the left and right fixed ends 411, 411, respectively. The left and right fixed ends 411 and 411 extend in the upright direction and laterally with respect to the axial direction, and the left and right fixed portions 412 and 412 are arranged to be spaced apart from the left and right rim sides of the wheel rim 21 in the axial direction. Are formed respectively. The left and right pads 42, 42 are made of rubber and are placed on the left and right fixing parts 412, 412.

  The pads 42, 42 have left and right friction surfaces 421, 421 that are spaced apart from the left and right rim sides of the wheel rim 21 when the left and right attachment portions 32, 32 are in their normal positions. When the attachment portions 32, 32 are in a position to mechanically brake, the brake operation is performed on the wheel rim 21 by contacting and rubbing the left and right pivots.

  The magnetic units 43 and 43 are placed on the left and right fixing parts 412 and 412. The left and right magnetic units 43, 43 have first and second magnet blocks 431, 431,... That are permanent magnets disposed at positions opposite to the corresponding positions of the left and right pads 42, 42, respectively. , Each having opposite magnetic poles to the corresponding ones of the left and right pads 42, 42 for forming a magnetic field. Further, the first magnet blocks 431 and 431 of the magnetic unit 43 face the wheel rim 21 and have opposite magnetic poles, and the second magnet blocks 431 and 431 of the magnetic unit 43 face the wheel rim 21 and are reversed. Of magnetic poles. Furthermore, the first and second magnet blocks 431 are formed thinner than the corresponding pads 42 so that the magnetic field formed is insufficient to hold the wheel rim 21 during travel before being braked. The

  When the braking operation is executed, a force that gradually and sufficiently holds the force to form the magnetic field until the position to apply the brake is reached is generated so that the rotational speed of the wheel rim 21 can be reduced.

  As shown in the drawing, the pads 42 and 42 are formed so that the magnetic field generates a drag force that reduces the rotational speed of the wheel rim 21 before the left and right friction surfaces 421 engage the wheel rim 21 by friction. Is done. Moreover, when the wheel rim 21 rotates faster, the drag force becomes larger. For this reason, a stable and safe brake operation can be executed, and the useful life of the pad 42 is increased.

  While what has been considered to be the most practical and preferred embodiments of the invention has been described, the invention is not limited to the disclosed embodiments, but is understood to include the broadest interpretation and equivalent arrangements. .

  ADVANTAGE OF THE INVENTION According to this invention, even if it brakes suddenly, the driving | running | working safety | security of a bicycle is not impaired, stable and safe brake operation can be performed, and the brake assembly and brake shoe with a long pad life are obtained. it can.

2 wheel 21 wheel rim 3 brake arm 31 pivot end 32 mounting part 4 brake shoe 41 holder 411 fixed end 412 fixed part 413 stud 42 pad 421 friction surface 43 magnetic unit 431 magnet block 5 brake cable

Claims (5)

A brake assembly for braking a bicycle wheel comprising a frame body and a wheel having a wheel rim made of a ferromagnetic material having high magnetic susceptibility and having left and right rim sides surrounding the wheel shaft in the axial direction. ,
Left and right pivot ends mounted so as to be pivotable to the frame body about the left and right pivots at right angles to the axial direction, and extend from the left and right pivot ends outside the wheel rim in an upright direction When the brake is applied, the left and right mounting parts move from the normal position away from the wheel rim to the mechanically braked position where the left and right mounting parts approach the wheel rim. Left and right brake arms,
Left and right vertical lines are formed at left and right fixed ends that are formed at right angles to the axial direction in the upright direction, with left and right fixed portions that are spaced apart in the axial direction from the left and right pivot ends. Right and left holders that extend along the left and right mounting parts,
When the left and right mounting parts are in a normal position, the left and right rims have left and right friction surfaces that are spaced apart from each other, and the left and right mounting parts are in a position to mechanically brake left and right pad the performing the braking operation to the wheel rim, is placed on the fixed part of the right and left,
Axial facing to form the magnetic field, the force generated by the magnetic field is not enough to slow down the wheel rim rotation speed, and is placed spaced from the left and right pivot ends in the normal position, braking operation Is executed on the left and right fixing parts, which generate a force on the wheel rim that is sufficiently large that the magnetic field can gradually reduce the rotational speed of the wheel rim until the brake position is mechanically reached. Left and right magnetic units,
Equipped with a,
The magnetic unit has first and second magnet blocks disposed on both sides of the left and right pads,
The brake assembly according to claim 1, wherein the first and second magnet blocks are formed to be thinner than the left and right pads arranged on the sides thereof . The first magnet blocks of the magnetic unit each have opposite magnetic poles facing the wheel rim;
The brake assembly according to claim 1 , wherein the second magnet blocks of the magnetic unit each have opposite magnetic poles facing the wheel rim. The magnetic poles of the first magnet block arranged on one side of the left and right pads and the magnetic poles of the second magnet block arranged on the other side of the left and right pads are opposite magnetic poles. The brake assembly according to claim 2 . A brake shoe for mounting on a brake arm of a bicycle that is pivotable from a normal position away from the wheel rim to a position to mechanically brake by approaching the wheel rim,
A holder for mounting on a brake arm having a fixed end portion that forms a fixed portion that is spaced from the end side of the wheel rim; and
Wherein the brake arm has a friction surface which is spaced between the end side when in the normal position, the brake arm is to perform the braking operation to the wheel rim when in the position to apply a mechanical braking A pad placed on the fixed part;
Is in a normal position when the force generated by the magnetic field is insufficient to slow down the rotational speed of the wheel rim, when performing the brake operation, the wheel rim is gradually magnetic field until it reaches a mechanically braking position A magnetic unit placed on the fixed part to form a magnetic field, arranged to be spaced from the end side that generates a sufficiently large force on the wheel rim to reduce the rotational speed of the wheel rim ,
Bei to give a,
Each of the left and right magnetic units has first and second magnet blocks disposed on both sides of each of the left and right pads,
The brake shoe, wherein the first and second magnet blocks are formed thinner than the left and right pads arranged on the sides thereof . The magnetic poles of the first magnet block arranged on one side of the left and right pads and the magnetic poles of the second magnet block arranged on the other side of the left and right pads are opposite magnetic poles. The brake shoe according to claim 4 .

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