JPS6027223Y2 - disc brake device - Google Patents

Description

[Detailed description of the invention] This invention is based on a hanger that suspends and supports both friction pads between the first and second sandwiching arms of the brake capacitor, which sandwich a pair of left and right friction pads that rub against both sides of the brake disc. Conventionally, in this type of disc brake device, the back plate of the friction pad slides directly on the hanger pin, so in order to reduce the weight of the device, the back plate was When the plate is made of A1 alloy or other light alloy, its wear resistance is poor, meaning that as the back plate slides on the banger pin, the pin hole gradually deforms or enlarges due to wear, which may cause excessive wear resistance. When the friction pad reaches this point, the axial slidability of the friction pad is impaired, resulting in disadvantages such as a reduction in braking force, uneven wear of the friction pad, and generation of abnormal noise due to vibration of the friction pad.

This tendency is particularly noticeable when the hanger pin supports the braking torque applied from the brake disc to the friction pad.

The present invention aims to provide a highly durable disc brake device that eliminates the above-mentioned inconveniences, and its features include:
A pair of flanges that are fitted into the back plate of the friction pad through a hard collar elastic member that slides on the outer periphery of the hanger pin, and that slidably abut on both sides of the back plate are integrally connected to both ends of the collar. There it is.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The illustrated example is a disc brake device for a motorcycle, in which a brake disc D rotates together with a wheel (not shown).
A bracket B is arranged adjacent to one side of the vehicle body, and this bracket B is fixed to the vehicle body, for example to the front fork F, by means of mounting bolts 1.1.

A brake caliper C having first and second clamping arms 21°2□ that straddles a part of the outer periphery of the brake disc D is mounted on the bracket B with first and second sliding arms parallel to the axis of rotation of the brake disc D. They are connected via moving pins 31, 3□.

The first sliding pin 31 is supported at both ends by a pair of ears 4, 4 protruding from the upper part of the brake caliper C, and its middle part slides into the support hole 5 at the upper end of the bracket B. 32 has one end fixed to the lower part of the brake caliper C, and the other end slides into the support hole 6 in the lower part of the bracket B.

71, 7□ are dustproof boots that hold the sliding portions of the sliding pins 31, 3□.

A window 8 is provided in the ceiling portion 23 connecting the two clamping arms 21, 2□ of the brake caliper C, and a pair of left and right friction pads P1. Insert P2 into brake caliper C.

Further, the first clamping arm 21 of the brake caliper C is formed with a hydraulic cylinder 9 that communicates with a known mask cylinder (not shown) operated by a brake pedal, and is connected to one of the friction pads P1. The piston 11 that can press the back plate 101 of P2 is slid together.

The second pinching arm 2□ is brought into contact with the back plate 10° of the other friction pad P2.

Above back plate 10. ．． 10□ are all made of A1 alloy, and each upper end has a pair of front and rear pin holes 12゜12, into which a hard collar 14 is inserted through an elastic member 13 such as rubber. Fit into place.

In the illustrated example, the hard collar 14 has flanges 14a and 14b integrally connected to each end of each back plate 10. , 10 degrees directly in the axial direction of the hanger pin. , 10 degrees, and at least one flange 14b is formed by expanding one end of the collar 14 after fitting it into the pin hole 12 (see especially FIG. 7).

Thus, both flanges 14a and 14b can slide on the side surfaces of each back plate 101° and 10□ so as to allow the elastic member 13 to deform.

The material of the hard collar 14 is suitably stainless steel, and the elastic member 13 is suitably a rubber bushing, in which case it is baked onto the outer peripheral surface of the collar 14.

Further, a pair of front and rear hanger pins 15, 15 are installed between the first and second pinching arms 21, 2□ so that they can be inserted and removed.
4. Insert the hanger pin 15 into 14 so that it can slide freely.

A retainer 16 is provided at the tip of the hanger pin 15.

As a result of the above, friction pad P1. P2 is suspended and supported by a hanger pin 15 via an elastic member 13 and a hard collar 14.

In the figure, reference numeral 17 denotes a cover for closing the front window 8, which is detachably fixed to the brake caliper C with screws 18.

Next, to explain the operation of this embodiment, when pressure oil is supplied from a mask cylinder (not shown) to the hydraulic cylinder 9 by operating the brake pedal, the piston 11, which moves forward due to the oil pressure, presses the back surface of one of the friction pads P□. So,
The pad P□ slides on the hanger pin 15 together with the collar 14 and comes into pressure contact with one side of the brake disc D.

Then, due to the reaction, the brake caliper C moves in the opposite direction to the piston 11 along the first and second sliding pins 31 and 3 degrees, and the second clamping arm 2□ presses the other friction pad P2. is brought into pressure contact with the other side of the brake disc D.

Thus, the pair of friction pads P1. P2 rubs equally on both sides of the brake disc D to exert braking force.

By the way, friction pad P1. P2 is each back plate 101.1
The inner surface of the 0° pin hole 12 is reinforced by the hard collar 14 and its sliding bearing width is expanded, so that one friction pad P1 slides smoothly on the hanger pin 15 when pressed by the piston 11. The sliding causes the pin hole 12 to open.
The inner surface will not wear out or deform.

Also, both friction pads P1. Even if the braking torque that P2 receives from the brake disc D is transmitted to and supported by the hanger pin 15, each back plate 10. , 10°, the inner surface of the pin hole 12 is protected from braking torque by the hard collar 14 and the buffering function of the elastic member 13, and is not deformed.

Furthermore, friction pad p1. p2 is brake disc D
If vibration is generated due to sliding friction with the elastic member 13, the vibration is absorbed by the elastic deformation resistance of the elastic member 13 itself and the sliding friction resistance of both flanges 14a and 14b against each back plate 10ttto□ when the elastic member 13 is deformed. Because it is attenuated,
Brake caliper C will not resonate.

Friction pad P1 worn to the limit of use. When replacing P2 with a new part, remove the cover 17 and retainer 16, pull out the hanger pin 15 from the brake caliper C, then take out both worn friction pads P□ and P2 from the window 8, and replace the above. A new friction pad is installed in the opposite manner.

As described above, according to the present invention, the hard collar is fitted through the elastic member into the pin hole of the back plate of the friction pad, which is penetrated by the hanger pin, so that the inner surface of the pin hole is reinforced by the hard collar and the elastic member Due to the buffering effect, etc., the expansion and deformation of the pin hole due to sliding and braking torque can be effectively prevented, and the axial sliding properties of the friction pad are good, and good braking action is exhibited over a long period of time. It is also possible to prevent uneven wear of the friction pad, and as a result, it is possible to use a light alloy for each back plate, resulting in a friction pad that is lightweight and has excellent durability.

Moreover, since the elastic member also absorbs the frictional vibrations of the friction pad of the elastic member, it is possible to suppress the resonance phenomenon of the brake caliper and prevent the occurrence of abnormal braking noise.

Furthermore, since a pair of flanges that slidably abut on both sides of the back plate are integrally connected to each end of the hard collar, these flanges can reliably prevent the collar from falling off the back plate. Of course, it is possible to substantially expand the sliding bearing width of the pin hole in the back plate into which the collar is inserted, making it possible to further stabilize the sliding support of the back plate by the banger pin, and to achieve even better braking action. At the same time, uneven wear of the friction pad can be effectively prevented.

Moreover, when the front elastic member deforms, the flange
Since sliding frictional resistance can be imparted to the backing plate by rubbing the side surface of the backing plate, the vibration of the friction pad can also be damped by the sliding frictional resistance, and in conjunction with the buffering function of the elastic member. This makes it possible to more effectively prevent the occurrence of abnormal braking noise.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention, in which Fig. 1 is a partially longitudinal plan view, Fig. 2 is a right side view thereof, Fig. 3 is a left side view thereof, and Figs. The figure is IV-I in Figure 2.
7 is a cross-sectional view taken along the line ■--■ in FIG. 6. C... Brake caliper, D... Brake disc, Pl, P2... Friction pad, 2
1...First pinching arm, 2□...Second pinching arm, 13...Elastic member, 14...Hard collar 14a, 14b. ...Flange.

Claims (1)

[Scope of Claim for Utility Model Registration] A hanger pin that suspends and supports both friction pads can be inserted and removed between the first and second pinch arms of the brake caliper that sandwich a pair of left and right friction pads that rub against both sides of the brake disc. In the constructed disc brake device, a hard collar that slides on the outer periphery of the hanger pin is inserted into the back plate of the friction pad via an elastic member, and a pair of flanges that slidably abut on both sides of the back plate are inserted. The collar is characterized in that it is integrally connected to both ends of the collar. Disc brake device.