JP3107593U - Improvement of bicycle brake structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure improvement of a bicycle brake.
SOLUTION: It is composed of main elements such as a first brake arm 2, a second brake arm 3, a connecting piece 4 and an interlocking piece 5 made of a metal plate material by a punch press, and a coil spring 7 and a central bolt 6 The first brake arm is pivotally attached to the vehicle body by the center bolt 6 by the screw 32 and the pivot screw 8, and the second brake arm 3 is pivotally attached to the connecting piece 4 pivotally attached to the center bolt 6 by the pivot 8. It is pivotally attached, and the brake shoes 201 and 301 can be sandwiched with respect to the wheel frame against the repulsive force of the spring 7.
The brake operation is transmitted to the screw 32 by a brake cable passing through the adjusting screw 24, the pin 52 is passed through the second brake arm, and the first brake arm is driven by the other end of the interlocking piece 5 rotated by the pivot screw 8. The one end 27 is pushed up and transmitted.
[Selection] Figure 1

Description

  The present invention relates to an improvement in the structure of a bicycle brake, and in particular, a brake in which a brake sandwiching element (first brake arm, second brake arm, connecting piece and interlocking piece) of the bicycle brake is molded and assembled by a punch press made of a metal plate material. Concerning structure.

FIG. 6 shows a bicycle brake 1 that is commonly used in the prior art. The two main elements of the first brake arm 11 and the second brake arm 12 are manufactured by a manufacturing method of metal punch press molding, and then the restoring spring is used. 13, parts such as the center bolt 14 and the adjusting screw 15 are assembled to form a bicycle brake structure. However, in the above structure, the metal plate material is punch-pressed to mold the first brake arm 11 and the second brake arm 12, the center bolt 14 is penetrated, and the two are pivotally attached. When used for a certain period of time, the first brake arm and the second brake arm receive an uneven force, resulting in a drawback that the braking effect is deteriorated. Also, in recent years, there has been a tendency for more strict emphasis on braking effectiveness and testing of bicycle brakes. Therefore, the problem to be solved by the present invention is to improve the above-mentioned drawbacks, and the brake structure that is assembled by punch pressing the metal plate material provides the selectivity of the diversification of goods and the consumer. Satisfy your needs.
JP-A-10-86881

  A main object of the present invention is to provide an improved structure of a bicycle brake that is assembled and molded by punch pressing a metal plate material.

  In order to achieve the above-described object, the structural improvement of the bicycle brake of the present invention is mainly made up of a first brake arm, a second brake arm, a connecting piece, an interlocking piece, etc., which are mainly made of a metal plate material by a punch press. It is composed of elements, and is provided with parts such as coil springs, center bolts, screws and pivoting screws, and has an operating characteristic in which an interlocking piece is placed between the first brake arm and the second brake arm and sandwiched simultaneously. By doing so, only one side receives a force and does not press the wheel frame, so that practicality, inventive step and industrial utility value are sufficiently provided. Also, use a long moment between the adjustment screw that is the point of action and the pivot screw that is the fulcrum (longer than the short moment b from the adjustment screw that is the point of action of the conventional brake to the center bolt that is the fulcrum). Therefore, it is possible to improve the effectiveness and safety of the brake because it has an excellent machine profit.

  Also, put the bent part of the coil spring in the outer layer of the center bolt, press the presser end against the abutting edge of the first brake arm, press the first brake arm directly with elasticity, and connect the bent end of the coil spring The first brake arm and the second brake arm are effectively returned to their original positions by inserting the second brake arm, which is inserted into the insertion hole of the piece, and indirectly pushing the second brake arm interlocked with the connecting piece.

  As described above, the structure improvement of the bicycle brake according to the present invention is achieved by combining the first brake arm, the second brake arm, the connecting piece, and the interlocking piece formed by punch-pressing a metal plate material into the braking effect and the mechanical benefit. Is clearly improved.

  As shown in FIG. 1 and subsequent figures, the structure of the bicycle brake according to the present invention is mainly improved by a first brake arm 2, a second brake arm 3, a connecting piece 4 and an interlocking piece 5 made of a metal plate material by a punch press. It consists of the main elements such as. The center bolt 6 is passed through the positioning hole 21 on one side of the first brake arm 2, the spring sleeve 26, the hole 41 of the connecting piece 4, screwed through the retaining nut 61 and through the pipe of the bicycle, and positioned. Let Further, the through-hole 31 of the second brake arm 3, the shaft hole 51 of the interlocking piece 5, and the through-hole 42 on the other side of the connecting piece 4 are sequentially passed by the pivot screw 8, and are fixed by tightening with a nylon nut 81. To do. Further, a wear-resistant washer 54 is provided between the connecting piece 4 and the interlocking piece 5 so that the local part of the interlocking piece 5 can be rotated, and the bent portion 73 of the coil spring 7 is a spring sleeve in the outer layer of the central bolt 21. 26, the bent end 71 of the coil spring 7 is inserted into the insertion hole 43 of the connecting piece 4, the other presser end 72 is pressed against the abutting edge 22 of the first brake arm 2, and the first brake The adjusting screw 24 screwed by the end head 23 of the arm 2 is attached to the brake cable 25. When the cable end 251 of the brake cable 25 is fixed to the screw 32 at the end of the second brake arm 3 and the brake is operated, the press ends 20 of the first brake arm 2 and the second brake arm 3 are operated. , 30 interlocks the brake shoes 201 and 301 and presses and stops the wheel toward the wheel frame 9. When the brake force is loosened, the first brake arm and the second brake arm are returned to their original positions by the repulsive force of the coil spring 7.

  In addition to being fixed to the bent end 71 of the coil spring 7, the connecting piece 4 provides an appropriate restraining action for the interlocking piece 5, and the pin 52 of the interlocking piece 5 is opened to the second brake arm 3. 33, the recessed portion 53 of the interlocking piece 5 is installed so as to press the convex portion 27 of the first brake arm 2, and the first brake arm 2 and the second brake arm 3 are interlocked with each other. The first brake arm 2 and the second brake arm 3 are operated at the same time so that no force is generated only on one side.

  Further, each main element of the present invention has a structure in which a part of the metal plate material is directly integrally punch press molded (for example, the pin 52 of the interlocking piece 5, the opening 33 of the second brake arm 3, the first brake). Since this is the contact edge 22 of the arm 2, etc., it does not need to be separately processed and assembled, and has a suitable structural strength, so that it matches the economic efficiency.

  In addition, the present invention (see FIG. 5) uses the long moment a between the adjusting screw 24 as the action point and the pivot screw 8 as the fulcrum, so that the action point of the conventional brake (see FIG. 7) is obtained. Since the mechanical operation advantage is superior to the short moment b from the adjusting screw 15 to the center bolt 14 that is the fulcrum, the effectiveness and safety of the brake can be improved.

It is a disassembled perspective view which shows embodiment of this invention. It is an assembly perspective view showing an embodiment of the present invention. It is an assembly top view showing an embodiment of the present invention. It is a figure when this invention is assembled. It is a figure when this invention is assembled. It is a perspective view of the brake of a prior art. It is a figure which shows the use condition of the brake of a prior art.

Explanation of symbols

2 ... 1st brake arm 21 ... Localization hole 22 ... Contact edge 23 ... End head 24 ... Adjustment screw 25 ... Brake cable 251 ... Cable end 26 ... Spring sleeve 27 ... Convex part 20, 30 ... Press end 201, 301 ... Brake shoe 3 ... second brake arm 31 ... through hole 32 ... screw 33 ... opening hole 4 ... connecting piece 41 ... hole 42 ... through hole 43 ... insertion hole 5 ... interlocking piece 51 ... shaft hole 52 ... pin 53 ... dent 54 ... Abrasion resistant washer 6 ... Center bolt 7 ... Coil spring 71 ... Bending end 72 ... Presser end 73 ... Bending part 8 ... Pivoting screw 81 ... Nut 9 ... Wheel frame a ... Long moment b ... Short moment

Claims (1)

It consists of a first brake arm, a second brake arm, a connecting piece and an interlocking piece formed by punching a metal plate material, and a center bolt is positioned on one side of the first brake arm against these A hole, a spring sleeve, and a hole of the connecting piece are respectively passed through and connected with a retaining nut. In addition, a through-hole of the second brake arm, a shaft hole of the interlocking piece and the other of the connecting piece are sequentially connected by a pivot screw. By penetrating the through hole on the side of and tightening and fixing with a nut,
The first brake arm rotates around the center bolt, and the second brake arm rotates around the pivot screw inserted through the connecting piece pivotally attached to the center bolt to perform the brake operation.
Further, a coil spring is fitted into the spring sleeve formed outside the center bolt, the bent end of the coil spring is inserted into the insertion hole of the connecting piece, and the other presser end is connected to the first brake arm. By pressing against the edge and fixing the connecting piece to the bent end of the coil spring, the repulsive force of the coil spring is operated in the direction in which the first and second brake arms release the brake,
The pin formed on the end of the interlocking piece is fitted into the opening of the second brake arm, and the recess formed on the other end of the interlocking piece replaces the protrusion of the first brake arm. When the brake operation is performed via the second brake arm, the rotating operation is linked to the first brake arm convex portion by the interlocking piece when the brake operation is performed. The load was equally applied to both.
Improvement of the structure of the bicycle brake.

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