JPH0417871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a retainer and pad spring for a vehicle disc brake that is installed between a bracket and a friction pad.

[Conventional technology]

In disc brakes installed on vehicles such as four-wheeled cars, the friction pads are placed on both sides of the caliper, which are placed opposite each other across the disc scroll in the mounting recess of the caliper.
There is one that is supported by a pair of arms of a bracket placed across the outer periphery of the disc rotor.

This technology fixes a sliding pin to the arm of the bracket or the caliper, supports the caliper so that it can move in the disk axial direction via the sliding pin, and supports the caliper on both sides of the disk rotor and on the inside of both arms. A retainer or a retainer-cum-pad spring is interposed in the stepped portion provided facing the disk, and the ears on both sides of the friction pad are suspended to support the friction pad so as to be slidable in the axial direction of the disk.

The above-mentioned retainer covers and protects the stepped part of the bracket that serves as the torque receiving part during braking, and guides the sliding of the friction pad ears smoothly.The retainer also has a pad spring integrated into the retainer. In addition to the function of the retainer, the pad spring also presses the upper surface of the lug of the friction pad to prevent the friction pad from floating due to braking torque.

[Problem that the invention attempts to solve]

However, with the above-mentioned disc brake,
In order to ensure smooth sliding of the caliper, the pin holes formed in the arms of the bracket or in the caliper are formed with a larger diameter than the sliding pins, so the contact between the vehicle body and the road surface is reduced, especially when driving on rough roads. If the caliper moves suddenly due to a collision or the resulting reaction of the vehicle body, the sliding pin that supports the caliper may interfere with the pin hole, creating impressions on both, which may result in a lack of durability and smoothness of these sliding parts. It was hot.

The present invention was developed against the background of this situation, and is a disc brake for vehicles that absorbs the sudden movement load of the caliper, prevents dents from the sliding pins and pin holes, and maintains the smooth sliding of the caliper. The purpose is to provide a retainer and pad spring.

[Means for solving problems]

In order to achieve the above-mentioned purpose, the present invention has a pair of arms of a bracket placed across the outer periphery of a disk rotor, and a caliper placed between both arms is moved in the disk axial direction via a sliding pin. A retainer/pad spring is interposed in the step portions provided on both sides of the disc rotor and facing each other on the inside of both arms, and the disc rotor is placed in the mounting recess of the caliper with the disc rotor sandwiched therebetween. In a vehicle disc brake in which the ears of a friction pad are suspended and the friction pad is slidably supported in the axial direction of the disc, the retainer/pad spring covers the stepped portions on both sides of the disc rotor to reduce the friction. One guide rail part that guides the sliding of the ear piece of the pad, and a notch on the inner circumference side of the arm that protrudes toward the opposite side of the caliper from the connection part that connects both guide rail parts at the center of the upper part and straddles the outer circumference of the disc rotor. a mounting tongue piece that is fitted to the part;
An extension part that continues from the connection part and projects toward the caliper side, and an extension part that goes around from the extension part to the disk rotor side and faces the guide rail part, and whose tip faces the connection part and forms an ear of the friction pad. It is characterized by having a pad pressing part that presses the upper part of the piece, and an elastic piece that projects from the extending part toward the caliper and presses the side surface of the caliper.

[Effect]

According to the above configuration, the caliper supported between both arms of the bracket is pressed and supported at the center position without wobbling by the resilient pieces of each retainer and pad spring, and there is no interference between the sliding pin and the pin hole. is prevented.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

A bracket 2 of a disc brake 1 fixed to a vehicle body is provided with a pair of arm parts 2a, 2a that straddle the outer periphery of a disc rotor 3 in the disc axial direction.
A caliper 5 that brakes the disc rotor 3 by pushing the friction pads 4, 4 is supported between the arms 2a, 2a.

The arm portions 2a, 2a of the bracket 2 are provided with stepped portions 2b, 2b, respectively, on both sides of the disc rotor 3 and on the inner side facing the other arm portion 2a.
A collar portion 2c is provided above each step portion 2b to protrude inward.

The caliper 5 is composed of an action part 5a and a reaction part 5b facing both sides of the disc rotor 3, and a bridge part 5c connecting the action part 5a and the reaction part b across the outer periphery of the disc rotor 3. Support arms 5 protruding from both sides of the action portion 5a
Sliding pins 6, 6 are fixed to d, 5d, respectively, and the sliding pins 6, 6 are connected to each arm portion 2 of the bracket 2.
The caliper 5 is inserted into the pin holes 7, 7 drilled in a, and is supported so as to be slidable in the disk axial direction.

Further, the friction pads 4, 4 are disposed facing each other with the day scroll 3 interposed in the mounting recess 5e provided inside the bridge portion 5c.
is suspended from the stepped portion 2b of the bracket 2 via a retainer/pad spring 8 with ears 4a, 4a protruding from both sides.

The retainer/pad spring 8 is connected to the stepped portions 2 of the arm portions 2a disposed on both sides of the disc rotor 3.
a pair of guide rail portions 8a, which cover b and 2b in an L-shape and guide the sliding movement of the lug 4a of the friction pad 4;
8a, a connecting portion 8b that connects both guide rail portions 8a, 8a at the upper center and rises upward, and a connecting portion 8b that protrudes from the connecting portion 8b toward the side opposite to the caliper and connects the bracket 2.
a mounting tongue piece 8c that is fitted into a notch 2d formed on the inner periphery of the arm 2a; an extension 8d that protrudes toward the caliper 5 continuously from the connection 8b;
A hanging portion 8e hanging down from d to the guide rail portion 8a side
At the lower end, the lower part of the flange 2c of the bracket 2 is bent toward the connecting part 8b side, and both guide rail parts 8a, 8
The pad pressing portion 8f facing the pad a and the side surface 5 of the caliper 5 protruding from the extending portion 8d toward the caliper 5 side.
It is composed of elastic pieces 8g, 8g that press f.

At the outer end of each guide rail portion 8a, there is a locking tongue piece 8 that holds the side surface of the stepped portion 2b of the bracket 2.
h, 8h are provided, and the pad pressing portion 8f is
So that the spring force works when the friction pad is installed.
It is arranged apart from the lower surface of the flange 2c of the bracket 2, and the tip 8i faces the connecting portion 8b, with a gap 〓C between the tip 8i and the connecting portion 8b. is set within the distance between the sliding pin 6 fixed to the caliper 5 and the pin hole 7 of the bracket 2.

The resilient pieces 8g, 8g are provided to protrude in a V-shape on both sides of the upper part of the hanging portion 8e, and the tip portion 8i of each resilient piece 8g is formed approximately parallel to the side surface 5f of the caliper 5, Both bullet pieces 8g, 8 placed on the other side
g, the caliper 5 is elastically held at the center position between the arms 2a, 2a.

The present embodiment is constructed as described above, and each friction pad 4 pushed by the caliper 5 has an ear piece 4.
the upper surface of the retainer/pad spring 8
A pad pressing part 8 that serves as a pad spring provided in
Guide rail portion 8a that is pressed by f and becomes a retainer
While being supported above, it moves in the disk axial direction and comes into sliding contact with the disk rotor 3.

In addition, the caliper 5 has both side surfaces 5f, 5f, and spring pieces 8g of both retainers and pad springs 8, 8.
Since the pad is elastically supported at the center position by 8 g and a distance C is set between the pad pressing part 8f and the connecting part 8b, for example, when the vehicle runs on a rough road, the body collides with the road surface or there is a reaction. Even if a sudden load is applied to the caliper 5 due to
g and 8g buffer the impact movement of the caliper 5, and the distance C regulates the amount of movement, so there is no interference between the sliding pin 6 and the pin hole 7, preventing the occurrence of impressions and smooth operation. It is possible to ensure proper braking action.

The shape and number of resilient pieces of the retainer/pad spring can be changed as appropriate to match the shape of the caliper and bracket.

[Effect of idea]

As explained above, the retainer and pad spring of the present invention includes a pair of guide rail parts that cover the stepped parts provided on the arms of the bracket on both sides of the disc rotor and guide the sliding of the ears of the friction pad; In addition to the pad pressing part that presses the upper part of the ear piece, there is also an elastic piece that protrudes toward the caliper and presses the sides of the caliper, which is placed between both arms of the bracket. The retainer and pad spring attached to each arm are resiliently supported at the center position, and when the vehicle is traveling on a rough road, for example, the caliper can be damaged due to collision with the road surface or reaction. Even if a sudden load is applied to the caliper, it absorbs the sudden movement load of the caliper, prevents interference between the sliding pin and the pin hole, prevents the occurrence of impressions, and maintains smooth sliding performance. Thus, stable braking operation can be ensured over a long period of time.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a perspective view of both retainers and pad springs attached to the arms of the bracket, and Figure 2 is a partially cutaway plan view of the disc brake. , FIG. 3 is a cross-sectional view of FIG. 2. 1... Disc brake, 2... Bracket,
2a...Arm part, 2b...Step part, 2c...Brim part, 2
d...Notch, 3...Disc rotor, 4...
Friction pad, 4a...Ear piece, 5...Caliper, 5
a... Action part, 5b... Reaction part, 5c... Bridge part, 5d... Support arm, 5e... Mounting recess, 5
f...Side surface, 6...Sliding pin, 7...Pin hole, 8
... Retainer and padded spring 8a ... Guide rail section, 8b ... Connection section, 8c ... Mounting tongue piece, 8
d...extending part, 8e...hanging part, 8f...pad pressing part, 8g...resilient piece, 8h...locking tongue piece, 8
i...Tip, 8j...Tip, C...Between.

Claims (1)

[Scope of utility model registration request] A caliper 5 disposed between the two arms is supported by a pair of arms 2a, 2a of a bracket 2 disposed straddling the outer periphery of the disk rotor 3 so as to be movable in the disk axial direction via a sliding pin 6. The caliper 5 is mounted across the disc rotor 3 by interposing a reiner/pad spring 8 on the stepped parts 2b, 2b provided on both sides of the disc rotor 3 and facing each other inside the arms 2a, 2a. In a vehicle disc brake in which the ears 4a, 4a of the friction pads 4, 4 disposed in the recess 5e are suspended, and the friction pads 4 are slidably supported in the disc axial direction, the retainer/pad spring 8 includes a pair of guide rail parts 8a, 8a that cover the step parts 2b, 2b on both sides of the disc rotor 3 and guide the sliding movement of the lug 4a of the friction pad 4, and both guide rail parts 8a, 8a. An arm portion 2 protrudes from the connecting portion 8b connected at the center of the upper portion toward the opposite side of the caliper and straddles the outer periphery of the disc rotor 3.
a Mounting tongue piece 8 fitted into the notch 2d on the inner circumferential side
c, an extending portion 8d that continues from the connecting portion 8b and projects toward the caliper 5, and a guide rail portion 8a, 8 that extends from the extending portion 8d to the disk rotor 3 side.
a, and a pad pressing portion 8f whose tip 8i faces the connecting portion 8b and presses the upper part of the lug 4a of the friction pad 4;
A retainer and pad spring for a disc brake for a vehicle, characterized in that it has an elastic piece 8g that projects to the side and presses 5f of the caliper 5.