JPH0611363Y2 - Sliding caliper type disc brake for vehicles - Google Patents

Description

Detailed Description of the Invention A. Purpose of the Invention (1) Field of Industrial Use The present invention relates to a sliding caliper type disc brake for a vehicle, in particular, a first caliper arm of a brake caliper is opposed to one side surface of a brake disc, and is connected to the first scissor arm. The second done
The clamp arm is opposed to the other side surface of the brake disc and is slidably provided on a bracket fixed to the vehicle body through a sliding pin parallel to the rotation axis of the brake disc. The pair of first and second friction pads, which sandwich and face each other, are respectively supported,
The present invention relates to an improvement in which a sandwiching arm is provided with a pushing member that presses a second friction pad supported by the sandwiching arm against a brake disc during braking.

(2) Conventional technology This type of disc brake uses a second pushing member for braking.
When the friction pad is pressed against one side of the brake disc,
The reaction force causes the brake caliper to slide along the sliding pin so that the first friction pad comes into pressure contact with the other side surface of the brake disc.

In this case, since the conventional disc brake does not include means for returning the brake caliper to the original position before braking after releasing the braking, it is necessary to secure the space between the brake disc and the first friction pad. It relies on the jumping action of the brake disc on the pad.

(3) Problems to be Solved by the Invention However, since the brake caliper does not return to the original position before braking because it relies on the jumping action of the brake disc as described above, the first friction pad Causes abnormal wear in a short period of time.

The present invention has been made in view of the above circumstances, and an object thereof is to provide the disc brake which can solve the above problem by positively returning the brake caliper to the original position before braking after releasing the braking.

B. Configuration of the Invention (1) Means for Solving the Problem In the present invention, a first clip arm of a brake caliper is made to face one side surface of a brake disc, and a second clip arm connected to the first clip arm is provided. The brake disc is provided slidably on a bracket fixed to the vehicle body via a sliding pin parallel to the other side surface of the brake disc and parallel to the rotation axis of the brake disc, and the brake disc is provided on the first and second sandwiching arms. A vehicle including a pair of first and second friction pads that are sandwiched and opposed to each other, and a push member that causes the second sandwich arm to press the second friction pad supported by the second sandwich pad against the brake disc during braking. Sliding caliper type disc brake for use in a brake disc entry side end surface of the brake caliper, straddling the brake disc, between the first pinching arm and the bracket Ri and binding the ends of the channel-shaped cover extending to the brake disc circumferential direction, in the cover, characterized in that impart elasticity to expand between its two ends.

(2) Action During travel of the vehicle, the elasticity of the cover holds the brake caliper in the original position, thereby forming a predetermined space between the brake disc and the first friction pad.

During braking, as the brake caliper slides, the cover is deformed so as to contract between both ends thereof, so that the first friction pad can be pressed against the brake disc.

After the braking is released, the cover is restored by its expansion elasticity, so that the restoring force restores the brake caliper to the original position, thereby forming a predetermined space between the brake disc and the first friction pad.

Also, since the cover extends in the circumferential direction of the brake disc from the end face of the brake caliper on the side where the brake disc enters, straddling the outer peripheral portion of the brake disc, the cover may prevent dirt such as muddy water splashed by the wheels and the brake disc from running inside the vehicle. Prevent infiltration.

(3) Example The illustrated example shows a sliding caliper type disc brake for a motorcycle as a vehicle. 1 to 4, a brake disc 1 rotates in the direction of arrow a with a wheel around a rotation shaft 2 thereof, a bracket 3 is disposed adjacent to one side surface of the brake disc 1, and the bracket 3 is It is fixed to the car body.

The brake caliper 4 is provided on the bracket 3 as follows. That is, the brake caliper 4 includes the first pinch arm 51 facing the one side surface of the brake disc 1 and the first pinch arm 5 _1.
It provided continuously to ₁ and a second scissors arm 5 ₂ facing the other side of the brake disc 1. Its second scissors arm _{5 2} includes a first, second mounting lug _{6 and 62} of the pair.

The bracket 3 is provided with a pair of first and second sliding pins 7 ₁ and 7 _{2 which} are parallel to the rotating shaft 2 of the brake disc 1, and each mounting pin 6 _{1 is} attached to each sliding pin 7 ₁ and 7 _2. , 6 ₂ mounting holes 8
₁ , 8 ₂ are slidably fitted. Fourth first sliding pin ₇₁ as best seen in FIG. The sleeve 9, the sleeve 9
Mounting bolt 10 which is threadedly attached to the bracket 3 through
The elastic boots 11 and 12 for protecting the sliding surfaces of the sleeve 9 and the mounting holes 8 ₁ of the first mounting ear 6 ₁ are provided between the both ends of the sleeve 9 and the mounting holes 8 ₁ . Second sliding pin 7
_2, the same reference symbols are affixed to the first slide pin ₇₁ and the same parts from the same configuration as best shown in Figure 2.

A pair of hanger pins 13 is provided between the first and second pinching arms 5 ₁ and 5 _2.
And a pair of first and second friction pads 14 ₁ and 1 on the first and second sandwiching arms 5 ₁ and 5 ₂ via both hanger pins 13.
4 ₂ are respectively supported so as to face each other across the brake disc 1.

The arm 5 ₂ second scissors includes a hydraulic cylinder 15 serving as pressing members, the hydraulic cylinder 15 and the cylinder body 15a which opens toward the ₂ second friction pad 14 slidably fitted in the cylinder body 15a It is composed of a piston 16 which is mounted. The cylinder body 15a communicates with a known brake master cylinder via a pressure oil introduction hole 17.

The piston 16 faces the rear surface of the second friction pad 14 _2,
The arms _{5 1} first pinching faces the rear surface of the first friction pad 14 _1.

The brake disk 1 entry side of the brake caliper 4, the channel-shaped cover 18 between the first scissors arm 5 ₁ and the bracket 3 is, the brake disk 1 from the brake disc entry side end surface 19 of the brake caliper 4 straddling the brake disk 1 It is provided so as to extend in the circumferential direction.

As shown in FIG. 5, the cover 18 is made of a thin spring steel plate, and the first and second mounting plates 2 facing each other are provided.
0 ₁ , 20 ₂ and a corrugated plate 21 connecting between one side edges of both plates 20 ₁ , 20 ₂ by the corrugated plate 21, the corrugated plate 21 covers the cover 18, both ends thereof, and thus both mounting plates 20 ₁ , 20 2.
Elasticity that expands between the _two is imparted. The reason for providing a corrugated plate 21 as weakens the restoring force by decreasing the spring constant of the return spring 18 is to prevent the second friction pad 14 _{and second} drag against the brake disc 1.

The first mounting plate 20 _1, bolt 2 which passes through the hole 22
3 is the end face 19 of the first sandwiching arm 5 _{1 on} the brake disc entry side.
It is screwed into the protruding portion 24 protrudingly provided to the first pinching arm 5 ₁ . The second mounting plate 20 ₂ is bound between the sleeve 9 end face and the bracket 3 side by passing the first slide pin ₇₁ of the mounting bolt 10 into the hole 25. In this case, the second mounting plate 20 ₂ first sliding pin _{7 1}
It has a function as a washer.

End surface 19 of the brake caliper 4 on the brake disc entry side
At the edge of the corrugated plate 21 existing in the vicinity, the inwardly bent piece 26
The inwardly bent piece 26 is engaged with the hook-shaped engaging piece 27 projecting from the end surface 19, whereby the return spring 18 is detented.

Next, the operation of this embodiment will be described.

During running of the vehicle, the brake caliper 4 by the elasticity of the cover 18 is stopped to the original position, thereby a predetermined gap between the brake disk 1 and the first friction pad 14 ₁ is formed.

Therefore if oil pressure supplied to the hydraulic cylinder 15 through hydraulic fluid insertion hole 17 from the master cylinder by operating the brake pedal, the piston 16 is advanced by the hydraulic pressure to push the second friction pad 14 _2, the friction pads 14 ₂ The hanger pin 13 is slid on and brought into pressure contact with one side surface of the brake disc 1. Then, due to the reaction force, the brake caliper 4 causes the first and second sliding pins 7 ₁ and 7 ₂ and the mounting holes 8 ₁ and 8 to be attached.
Slides in the opposite direction to the piston 16 while applying a slip between the ₂ by arm 5 ₁ first scissors first friction pad 14 ₁
Can be pressed and brought into pressure contact with the other side surface of the brake disc 1, and as a result, the brake disc 1 rotating in the direction of arrow a can be braked.

During this braking, the cover 18 deforms as the brake caliper 4 slides so as to reduce the space between the two mounting plates 20 ₁ and 20 ₂ , so that the first friction pad 14 ₁ can be pressed against the brake disc 1. .

After the braking is released, the cover 18 is restored by its elasticity, and the restoring force causes the brake caliper 4 to return to the original position, whereby a predetermined space is formed between the brake disc 1 and the first friction pad 14 _1. .

Further, the cover 18 straddles the outer peripheral portion of the brake disc 1 and has an end face 19 on the brake disc entry side of the brake caliper 4.
Since it extends in the circumferential direction of the brake disc 1, it prevents the muddy water scattered by the wheels and the brake disc 1 from entering the brake caliper 4 while the vehicle is running, thereby suppressing the deterioration of the braking performance due to the muddy water. be able to.

C. According to the present invention, the restoring force of the cover provided between the first clip arm of the brake caliper and the bracket fixed to the vehicle body returns the brake caliper to the original position before braking after releasing the braking. Therefore, while the vehicle is traveling, it is possible to prevent the abnormal wear of the first friction pad by forming a predetermined space between the brake disc and the first friction pad.

Further, since the cover has a function of preventing the infiltration of muddy water or the like scattered by the wheels or the brake disc into the brake caliper, it is possible to suppress the deterioration of the braking performance due to the water droplets or the like.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a side view of the whole, Fig. 2 is a sectional view taken along the line II-II of Fig. 1, and Fig. 3 is Fig. 2 II.
FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1, and FIG. 5 is a perspective view of the cover. 1 ... Brake disc, 2 ... Rotation axis, 3 ... Bracket, 4 ... Brake caliper, 5 ₁ , 5 ₂ ...... First,
Second pinch arm, 14 ₁ , 14 ₂ ...... First and second friction pads, 15 ...... Hydraulic cylinder (pushing member), 18 ...... Cover, 19 ...... Brake disc entry side end surface

Claims (1)

[Scope of utility model registration request] 1. A brake caliper having a first pinch arm facing one side surface of a brake disc, a second pinch arm continuous with the first pinch arm facing the other side surface of the brake disc, and the brake. A pair of first and second frictions slidably provided on a bracket fixed to the vehicle body through sliding pins parallel to the rotation axis of the disc, and opposed to each other with the brake disc sandwiched between the first and second sandwiching arms. A sliding caliper type disc brake for a vehicle, comprising: a pad supporting member; and a pressing member that presses the second friction pad supported by the pad against the brake disc when braking. A grip extending between the arm and the bracket in the circumferential direction of the brake disc from the end face of the brake caliper on the brake disc entry side across the brake disc. And binding the ends of the tunnel-shaped cover, the said cover, the vehicle sliding caliper type disc brake, characterized in that impart elasticity to expand between its two ends.