JPS597850B2 - disc brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc brake, and more particularly, to a disc brake that prevents deformation of a slide pin due to braking torque generated during braking.

In disc brakes that brake the rotating shaft by pressing a butt against the side wall surface of a rotor that rotates concentrically with the rotating shaft, during braking, the braking torque is applied by bringing the back plate of the butt into contact with the torque receiving arm. The torque is transmitted to the arm receiving the torque.

On the other hand, due to constraints on the mounting space for the disc brake, the wall thickness of the torque receiving arm is sufficient for tensile force, but cannot be made sufficient for bending force.

Therefore, elastic deformation of the torque receiving arm during braking is unavoidable.

However, this elastic deformation of the torque receiving arm during braking is difficult for disc brakes in which a slide pin is installed in an adapter integrated with the torque receiving arm and the caliper slides along the slide pin. This adversely affects caliper sliding.

That is, the elastic deformation of the torque-receiving arm during braking changes the pitch between the slide pins, and as a result, the caliper does not slide smoothly along the pins, and may sometimes pry the pins.
This creates insufficient pressure contact of the bat against the rotating rotor, reducing braking efficiency.

This kind of prying of the caliper against the slide pin is caused by the fact that the slide pin is installed at a position close to the torque receiving arm on the opposing side wall of the adapter having a U-shaped cross section. It is caused by something.

This invention is intended to solve the above-mentioned problems of the prior art.Basically, a slide pin is provided integrally with the bolt that fixes the adapter to the knuckle, and the caliper is slidably attached to the slide pin. Use technical means to retain it.

This technical means is adopted because the slide pin part is located at the center of the elastically deformed tenon that opens the torque receiving arm part outward, so even if a torque that widens the pitch between both pin parts occurs, the effect will not be affected. Even if a small force parallel to the external force acting on the torque receiving arm acts on the slide pin, the knuckle has high rigidity, so it does not change the pitch of the slide pin and does not pose a practical problem.

A preferred embodiment of the invention will now be described.

The main components of the disc brake 1 are basically an adapter 3 that is attached to a knuckle 2 that is fixed to a vehicle body, etc., and a caliper 4 that slides relative to the adapter in the axial direction of the adapter 3. During braking, by sliding the caliper 4 relative to the adapter 3, the pads 5 are brought into pressure contact with both side wall surfaces of a rotating rotor (not shown).

In this embodiment, the caliper 4 slides on the adapter 3 as follows.

See Figures 1 and 2.

A sliding portion of the caliper 4 relative to the adapter 3 is provided at a portion where the adapter 3 and the knuckle 2 are fixed.

As understood from Figure 2, knuckle 2 and adapter 3
A slide pin 7 is formed by integrally extending one side of the bolt 6 in one direction, and the through hole 9 provided in the pair of ears 8 of the caliper 4 is passed through the slide pin 7. A boot 10 is provided to protect the sliding part.

A screw 11 is provided at the tip of the bolt 6, and an annular flange 12 is provided at a proper location.

After passing the slide pin I through the through hole 9 of the ear part 8 of the caliper 4, the annular flange 12 is brought into contact with the side surface of the knuckle 2, and the slide pin I is inserted into the screw hole 13 of the adapter 3 through the knuckle 2. Tighten the screw 11 of the bolt 6 to fix the adapter and caliper.

Thus, caliper 4 connects knuckle 2 and adapter 3.
It is protected by a slide pin 7 that extends in one direction from the fixed portion of the holder and slides along the slide pin 7.

Next, the operation of the disc brake shown in FIGS. 1 and 2 will be described.

The adapter 3 having the torque receiving arm 14 is attached to the knuckle 2 fixed to the vehicle body etc. (not shown) by screwing the bolt 6 of the slide pin 7 onto the adapter 3 as described above, and when braking, the caliper 4 is attached. By sliding in the axial direction of the adapter 3 and relative to the adapter 3, the pair of pads 5 are brought into pressure contact with both side walls of a rotor (not particularly shown) that rotates concentrically with the knuckle spindle 15 during braking. .

In the example shown in FIG. 1, when the brake force is applied in the direction of arrow A, the back plate 16 of the brake force contacts the torque receiving arm 14, so that the torque receiving arm 14
It is elastically deformed as shown by the imaginary line in FIG.

This elastic deformation is performed around the fixed portion 6 between the adapter 3 and the knuckle 2, and the slide pin I is not deformed by the braking torque.

Of course, the forces in the direction A shown in FIG. It does not have an adverse effect to the extent that pin 7 becomes difficult.

As mentioned above, in the example shown in FIGS. 1 and 2, the slide pin 7 for sliding the caliper 4 onto the adapter 3
is molded integrally with the bolt 6 that fixes the adapter 3 to the knuckle 2.

Therefore, the elastic deformation that occurs in the torque receiving arm 14 during braking does not affect the slide pin 7 at all.

In this way, there is no change in the pitch of the pair of slide pins during braking, as has been experienced in the past, and the caliper 4 can be smoothly slid on the adapter 3 at all times.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the disc brake, and FIG. 2 is a side sectional view thereof. In the diagram: 1...disc brake, 2...
・Knuckle, 3...Adapter, 4...
・Caliper, 5...Butt, 6...
Bolt, I...Slide pin, 14...
・Torque receiving arm.

Claims (1)

[Claims] 1. Fix an adapter having a torque receiving arm on one side of the rotor to the knuckle of the vehicle using a pair of spaced apart bolts, place a butt back plate between the pair of torque receiving arms, and attach the butt back plate to the torque receiving arm. In the disc brake, the caliber is slidably supported with respect to the adapter in the axial direction of the rotor so that the butt held by the butt back plate is brought into pressure contact with the side wall of the rotor. A disc brake characterized in that a slide pin is formed integrally extending in the axial direction, and the caliber is slidably held on the slide pin.