JPH058064U - Mounting device for brake shoe return springs for wheel brakes - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to obtain a mounting device for mounting a brake shoe return spring for a wheel brake so that the return spilling does not fall off even if the return spilling resonates during brake vibration. [Structure] One end of the spring pin is fixed to the web of the brake shoe, a circumferential groove for hooking the hook part of the brake shoe return spring is provided at the other end, and a lock pin is fixed at the other end of the spring pin. A wheel brake in which a regulation plate is fitted on the outer periphery of the spring pin between the pin and the peripheral groove, and the minimum distance between the outer periphery of the regulation plate and the inner peripheral surface of the brake shoe rim is set smaller than the wire diameter of the return spring. Brake shoe return spring mounting device. A brake shoe return spring mounting device for a wheel brake, in which a tubular body fixed to the outer circumference of a spring pin by a lock pin is provided, and the tubular body is integrally connected to a regulation plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a mounting device for a brake shoe return spring for a wheel brake, Especially for mounting devices of brake shoe return springs for vehicle wheel brakes It is related.

[0002]

[Prior art]

  As shown in FIG. 4, generally, the brake shoe 1 in a wheel brake has a It is formed in an arc shape corresponding to the curvature of the inner peripheral surface of the drum drum 2, and one end is anchor play Is rotatably fixed to the brake cylinder, and the piston end of the brake cylinder 3 is connected to the other end. The brake cylinder 3 is designed to be connected when the brake is activated. Due to the movement, the brake shoe 1 expands inward, centering around the one end, The lining 5 as a friction material provided on the outer peripheral surface of the brake drum 4 is the inner peripheral surface of the brake drum 2. With a strong mutual pressure to brake the rotation of the brake drum 2. Also blur When releasing the brake, the return with one edge attached to the web 6 of the brake shoe 1 The brake shoe 1 is configured to return to a predetermined position by the tension of the spring 7. Has been done. Install the return spring 7 as shown in Fig. 5. A through hole 8 is provided on the middle side of the ew web 6, and a spring pin, for example, One end of the rod-shaped pin 9 is fixed by press fitting, screwing, or the like. Pull the hook 11 at the tip of the return spring 7 into the circumferential groove 10 formed at the other end. I am trying to mount it.

[0003]

[Problems to be solved by the device]

  However, the conventional brake shoe returns for wheel brakes as described above In the pulling attachment device, the return spring 7 is When it resonates, the hook portion 11 of the return spring 7 is attached to the circumferential groove 1 of the rod pin 9. 0, it jumps out from 0, it displaces largely, and it comes out from the other end of the rod pin 9 to the outside. The shoe does not return to its original position (before the brake is applied) and the lining hits the brake drum. There was a case in which a so-called brake drag phenomenon was caused.

[0004]   The installation device of the brake shoe return spring for the wheel brake of the present invention is The above-mentioned drawbacks are eliminated.

[0005]

[Means for Solving the Problems]

  The installation device of the brake shoe return spring for the wheel brake of the present invention is Has a peripheral groove for hooking the hook part of the brake shoe return spring, A spring pin with one end fixed to the web of the brake shoe and this spring pin Lock pin hole formed in the other end of the lock pin and the lock pin hole inserted in this lock pin hole And a rule fitted between the lock pin and the circumferential groove to the spring pin. It consists of a control plate, and the restriction plate is the minimum between the outer circumference and the inner peripheral surface of the brake shoe rim. The spacing should be smaller than the wire diameter of the brake shoe return spring. It is characterized by that.

[0006]   In addition, the mounting device for the brake shoe return spring for the wheel brake of the present invention. The stand has a circumferential groove for hooking the hook part of the brake shoe return spring. The spring pin with one end fixed to the web of the brake shoe, and this spring The tubular body fitted to the other end of the pin and the other end of the spring pin and the tubular body. A lock pin hole formed through it, and a lock pin inserted into this lock pin hole, The cylinder fitted into the spring pin between the lock pin and the circumferential groove. It is composed of a regulation plate integrated with the body, and the regulation plate is formed on the outer periphery of the regulation plate and the brake shoe rim. The minimum distance between the inner surfaces is smaller than the wire diameter of the brake shoe return spring above. It is characterized in that

[0007]

【Example】

  An embodiment of the present invention will be described below with reference to the drawings.

[0008]   In the first embodiment of the present invention, as shown in FIGS. Between the other end of the spring pin, for example, the rod pin 9 and the circumferential groove 10, which is orthogonal to the plane of the protrusion 6, A lock pin, for example, a split pin hole 12 that penetrates the rod pin 9 is provided. The split pin 13 is inserted into the hole 12 for fixing and is fixed to the rod pin 9, and A regulating disk 14 is fitted around the rod-shaped pin 9 between the pin 13 and the circumferential groove 10. The size of the regulation disc 14 is set so as to extend in parallel with the outer peripheral surface of the rod pin 9. The minimum gap δ between the inner surfaces of the protruding brake shoe rim 4 is the return spring. The wire diameter should be smaller than the wire diameter of G7.

[0009]   The installation device of the brake shoe return spring for the wheel brake of the present invention is Since the return spring 7 resonates due to the above-described structure, the hook 11 Will pop out from the circumferential groove 10 of the rod pin 9 and will be largely displaced in the axial direction of the rod pin 9. However, this displacement is prevented by the regulating disc 14 and therefore the other end of the rod 9 It does not come out from the outside.

[0010]   Further, the hook portion 11 is largely displaced in the axial direction of the return spring 7 and is restricted by the regulating disc. 14 and the brake shoe rim 4 try to escape from the gap between them, the gap δ between them Is less than the wire diameter of the return spring 7 Be blocked.

[0011]   In the second embodiment of the present invention, as shown in FIG. One end of the cylindrical body 15 fitted to the outer circumference of the other end of the rod 9 is integrally joined to form the rod-shaped pin 9 A hole 16 corresponding to the split pin hole 12 formed in The plug 13 is inserted into these holes 16 and 12.

[0012]   In the second embodiment of the present invention, the regulation disc 14 is used as compared with the first embodiment. There is no play between the rod-shaped pin 9 and the regulating disc 14 is tilted so that the distance δ varies. There is no risk of wood chips.

[0013]

[Effect of device]   As described above, the brake shoe return spring for the wheel brake of the present invention With the mounting device, it is possible to completely prevent the return spring from falling off due to vibration. There is a big profit.

[Brief description of drawings]

FIG. 1 is a front view of a mounting device for a brake shoe return spring for a wheel brake according to the present invention.

FIG. 2 is a side view of a mounting device for a brake shoe return spring for a wheel brake according to the present invention.

FIG. 3 is a front view showing another embodiment of a device for mounting a brake shoe return spring for a wheel brake according to the present invention.

FIG. 4 is an explanatory diagram of a conventional brake shoe return spring mounting device for a wheel brake.

FIG. 5 is an explanatory diagram of a main part of a conventional attachment device for a brake shoe return spring for a wheel brake.

[Explanation of symbols]

1 brake shoes 2 brake drum 3 brake cylinder 4 Brake shoe rim 5 lining 6 Brake shoe web 7 Return spring 8 through holes 9 Rod pin 10 circumferential groove 10 11 Hook part 12 split pin holes 13 split pins 14 regulated disc 15 tubular 16 holes

Claims (2)

[Scope of utility model registration request] 1. A spring pin having a circumferential groove for hooking a hook portion of a brake shoe return spring, one end of which is fixed to a web of a brake shoe, and a lock pin hole formed at the other end of the spring pin. It consists of a lock pin inserted into the lock pin hole and a regulation plate fitted between the lock pin and the circumferential groove on the spring pin, and the regulation plate has a minimum distance between its outer circumference and the inner circumferential surface of the brake shoe rim. A mounting device for a brake shoe return spring for a wheel brake, which has a size smaller than a wire diameter of the brake shoe return spring. 2. A spring pin having a circumferential groove for hooking a hook portion of a brake shoe return spring, one end of which is fixed to a web of the brake shoe, and a tubular body fitted to the other end portion of the spring pin. A lock pin hole formed by penetrating the other end of the spring pin and the cylindrical body, a lock pin inserted into the lock pin hole, and the cylinder fitted into the spring pin between the lock pin and the circumferential groove. Consists of a regulation plate integrated with the body,
A mounting device for a brake shoe return spring for a wheel brake, wherein the restriction plate has a size such that a minimum distance between an outer periphery thereof and an inner peripheral surface of a brake shoe rim is smaller than a wire diameter of the brake shoe return spring.