JP2010270793A - Brake shoe for bicycle and brake assembly equipped with the same - 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&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.

  In order 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 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 It consists of left and right mounting parts extending from the left and right pivot ends on the outside, and when the brake is applied, the left and right mounting parts from the normal position where the left and right mounting parts are separated from the wheel rim, Left and right brake arms that move to the position where the left and right mounting parts approach the wheel rim and mechanically brake, and left and right fixed parts that are spaced axially from the left and right pivot ends The left and right holders that extend along the left and right vertical lines that are interrupted at the right and left fixed ends that are perpendicular to the axial direction in the upright direction, When the left and right mounting parts are in a normal position, they have left and right friction surfaces that are spaced from the left and right rim sides, and contact the left and right pivot ends to rub, thereby The wheel rim performs a braking operation when the mounting portion is in a position to mechanically brake, and the left and right pads placed on the left and right fixed portions face each other in the axial direction to form a magnetic field, When the braking action is executed when the brake operation is performed, the magnetic field force is not sufficient to reduce the rotational speed of the wheel rim, and is arranged at a distance from the left and right pivot ends in a normal position. Until the position is reached And a left and right magnetic unit mounted on the left and right fixing parts, which generate a sufficiently large attractive force that can reduce the rotational speed of the wheel rim. Provide assembly.

  In the brake assembly, the magnetic unit preferably includes first and second magnet blocks disposed on both sides of the left and right pads.

  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.

  In the brake assembly, it is preferable that the first and second magnet blocks of the magnetic unit have a magnetic pole opposite to the corresponding pad.

  In the brake assembly, the first and second magnet blocks may be thinner than one of the corresponding pads.

  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 from the end side when the brake arm is in a normal position. A pad mounted on the fixed part, which has a friction surface arranged at a distance and the wheel rim performs a braking operation when the brake arm is in a position to mechanically brake, and a magnetic field force Is in a normal position when it is insufficient to reduce the rotational speed of the wheel rim, and when performing braking, the magnetic field gradually increases until the force of the magnetic field formed mechanically reaches the braking position. A magnetic unit placed on the fixed part to form a magnetic field, spaced apart from the end side that generates a suction force that is sufficiently large that the force to be formed can reduce the rotational speed of the wheel rim; A brake shoe is provided.

  In the brake shoe, it is preferable that the magnetic unit has first and second magnet blocks disposed on both sides of the left and right pads.

  In the brake shoe, it is preferable that the first and second magnet blocks are formed thinner than the corresponding left and right pads.

  In the brake shoe, it is preferable that the first and second magnet blocks of the magnetic unit have magnetic poles opposite to the corresponding left and right pads.

  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 at the left and right fixed ends 411, 411, respectively. The left and right fixed end portions 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 (9)

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, they have left and right friction surfaces that are spaced from the left and right rim sides, and by contacting and rubbing the left and right pivot ends, Left and right pads placed on the left and right fixed parts, wherein the wheel rim performs a braking operation when the mounting part is in a position to mechanically brake; and
Facing in the axial direction to form a magnetic field, the force of the magnetic field is insufficient to slow down the wheel rim's rotational speed. Placed on the left and right fixed parts, when the force that forms a magnetic field gradually until the brake position is mechanically generated, generates a suction force that is large enough to reduce the rotational speed of the wheel rim. Left and right magnetic units,
A brake assembly comprising:   The brake assembly according to claim 1, wherein the magnetic unit includes first and second magnet blocks disposed on both sides of the left and right pads. The first magnet blocks of the magnetic unit each have opposite magnetic poles facing the wheel rim;
The brake assembly according to claim 2, wherein the second magnet blocks of the magnetic unit each have opposite magnetic poles facing the wheel rim.   The brake assembly according to claim 3, wherein the first and second magnet blocks of the magnetic unit have magnetic poles opposite to the corresponding left and right pads.   The brake assembly according to claim 2, wherein the first and second magnet blocks are formed thinner than the corresponding left and right pads. 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
A friction surface disposed at a distance from an end side when the brake arm is in a normal position, and a wheel rim performs a braking operation when the brake arm is in a position to mechanically brake. A pad placed on the fixed part;
When the magnetic field force is insufficient to reduce the rotational speed of the wheel rim, it is in the normal position, and when performing the braking operation, the formed magnetic field force is gradually increased until it mechanically reaches the brake position. Arranged from the end side that generates a suction force that is sufficiently large that the force for forming the magnetic field can reduce the rotational speed of the wheel rim, and is placed on the fixed part to form the magnetic field A magnetic unit;
A brake shoe comprising:   The brake shoe according to claim 6, wherein the left and right magnetic units each include first and second magnet blocks disposed on both sides of the left and right pads, respectively.   The brake shoe according to claim 7, wherein the first and second magnet blocks are formed thinner than the corresponding left and right pads.   The brake shoe according to claim 7, wherein the first and second magnet blocks of the magnetic unit have magnetic poles opposite to the corresponding pads.

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