JPH04136337U - Friction pad retention structure for vehicle disc brakes - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents the rotation of the friction pad due to the drag of the disc rotor, causing a time lag in initial braking, and preventing the friction pad's ear from hitting the pad guide groove, causing knocking noise. Avoid making abnormal noises such as squealing. [Structure] The pad retainers 9 and 10 have a folded part that is bent in a U-shape toward the disc rotor, and a retainer part 9.
Pressing pieces 9e, 1 arranged approximately parallel to the front of b, 10b
Pad resilient portions 9f and 10f are provided. The outer edge of the folded part on the disk rotation side is inclined to widen from the outer circumferential side of the disk toward the inner circumferential side of the disk, and the lug piece 7a
The friction pad 8 is engaged with the lower side of the disc in a compressed state, and acts as a component force that urges the friction pad 8 in the disc rotational direction A and in the direction of the disc outer circumference. The outer edge of the folded part on the disc rotation side is tapered from the outer circumferential side of the disk toward the inner circumferential side of the disk, and is compressedly engaged with the upper side of the lug 7b to cause the friction pad 8 to rotate against the disk. It acts as a component force that urges in the rotational direction and the inner peripheral direction of the disk.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applicable to disc brakes installed in vehicles such as automobiles and motorcycles. For details, see the structure in which the friction pad is held by the pad guide part of the caliper support arm. related.

0002

[Conventional technology]

An ear piece protruding from the side of the back plate of the friction pad is formed on the caliper support arm of the bracket. For example, in the case of disc brakes that are held by pad guide grooves, As shown in Publication No. 63-24269, a pad with a smooth surface is placed in the pad guide groove. Install a retainer to allow the friction pad to move smoothly in the axial direction of the disc. ing.

0003 This technology uses friction pads in the pad retainers on both the disk retraction and retraction sides. Each pad is provided with a resilient part that urges the disc toward the outer circumference, and furthermore, the disc is rotated. The pad retainer on the side is equipped with a separate pad that biases the friction pad in the disc rotation direction. A spring part is provided to prevent the friction pad from rattling in the circumferential direction and radial direction of the disc. I'm doing it.

0004

[Problem that the idea aims to solve]

By the way, disc brakes generally have friction pads on the rotating disc rotor. When the pad slides into contact with the disk, the drag torque is applied to the disk outer circumference on the disk rotation side of the friction pad. Similarly, on the disk rotation side, drag torque acts toward the inner circumference of the disk. , a rotational moment about the friction pad's own center of gravity acts on the friction pad.

[0005] For this reason, even if the friction pad is ejected toward the outer circumference of the disk by the pad ejection part, , excessive braking occurs on the disk rotation side where drag torque acts toward the inner circumference of the disk. Friction pads are affected by operation, μ changes in the lining, vibration of the disc rotor, surface irregularities, etc. It acts as an overload that compresses the pad elastic part and rotates it toward the inner circumference of the disc. This may cause a time lag in initial braking, or the friction pad's lug may overlap the pad guide groove. When struck, it may produce abnormal noises such as tapping or squealing.

[0006] This invention was developed in view of these circumstances, and its purpose is to , a car that solves the above problems by preventing rotation of the friction pad due to drag torque. An object of the present invention is to provide a friction pad holding structure for a dual-use disc brake.

[0007]

[Means to solve the problem]

In accordance with the above-mentioned purpose, the present invention provides a method for installing disks in parallel in the axial direction outside the disk rotor. Pad guide grooves are provided facing each other in the caliper support arms, and these pad guides A pad retainer was placed in each groove and protruded from both sides of the back plate of the friction pad. In a vehicle disc brake designed to hold the lug, there is a disc brake on the disc rotation side. The friction pad is placed in one of the pad retainers arranged in the disc rotation direction and the disc rotation direction. A pad elastic part is provided that biases the disk in the direction of the outer circumference, and is placed on the disk rotation side. The pad retainer has a pad springing part that urges the friction pad toward the inner circumference of the disc. It is characterized by having the following.

[0008]

[Effect]

In such a configuration, the friction pad is preset in the direction of the rotational moment due to the drag torque. Since the friction pad is biased to , even if an overload is applied, the friction pad will not behave.

[0009]

【Example】

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

0010 The disc brake 1 is attached to one side of the disc rotor 2 rotating in the direction of arrow A. The caliper bracket 3 fixed to the disc rotor 2 is A pair of caliper support arms 3a, 3a arranged in parallel in the direction are extended, and both caliper support arms 3a, a floating caliper body 4 straddles the outer periphery of the disc rotor 2. It will be arranged in An insertion hole 3b is formed in each of the caliper support arms 3a, 3a. The caliper body 4 has sliding pins 5 protruding from the mounting arms 4a, 4a. It is inserted into each insertion hole 3b and supported so as to be movable in the disk axial direction.

[0011] On both sides of the disc rotor 2, there are friction pads with a lining 6 attached to a back plate 7. 8 are arranged. Ear pieces 7a and 7b are protruded from both sides of the back plate 7 at different levels. Each friction pad 8 is provided opposite to the caliper support arms 3a, 3a. The pad retainers 9, 1 have ears 7a, 7b in the U-shaped pad guide grooves 3c, 3c. These pad retainers 9, 9 are supported during braking and braking release. 10 to smoothly guide the movement of the disk in the axial direction.

0012 The ears 7a and 7b of the back plate 7 are approximately half the height of the pad guide groove 3c. The lug 7a on the disk rotation side is on the disk outer circumference side, and the lug 7a on the disk rotation side is on the disk outer circumference side. The lug pieces 7b are each deviated toward the inner circumferential side of the disk. Bridge part 4 of caliper 4 Between b and the back plate 7, there is a pad spring that biases the friction pad 8 toward the center of the disk. The ring 11 is compressed, and the friction pad 8 may rattle due to running vibration or when braking. This prevents the disk from floating toward the outer periphery when it comes into sliding contact with the disk rotor 2. Ru.

[0013] The pad retainers 9 and 10 have a series of connections arranged across the outside of the disc rotor 2. The binding pieces 9a, 10a and pad guide grooves protrude from both lower ends of the pieces 9a, 10a. 3c, 3c, and the U-shaped retainer parts 9b, 9b, 10b, 10b, It protrudes from the lower center of the ties 9a, 10a and is recessed inside the caliper support arm 3a. Locking pawls 9c and 10c are provided to be locked in the rotor groove 3d. Also, Each retainer portion 9b, 10b has a portion protruding from the outer edge thereof toward the disc rotor. The folded parts 9d and 10d are bent into a U-shape, and the retainer part 9b extends from the tip thereof. , 10b, and a pad resilient portion 9 consisting of pressing pieces 9e, 10e extending substantially parallel to the front of the pads 9e, 10b. f, 10f are provided.

[0014] Of these, the outer edge of the folded portion 9d of the pad springing portion 9f on the disk insertion side is It is sloped from the outer circumference of the disk to the inner circumference of the disk. For this reason, In the developed view of the pad retainer 9 shown in FIG. A folded part 9d protruding from the outer edge of b and a connecting piece along the retainer part 9b. The pressing piece 9e is bent toward the side 9a, forming an L-shaped strip. This strip is In order to arrange the pressure piece 9e in front of the retainer part 9b, a bent part that becomes the folded part 9d is formed. is bent diagonally, and the pressing piece 9e draws a conical trajectory with this bent portion as a fulcrum. this The conical bending trajectory indicates that the pad retainer 9 is in the pad guide groove 3 on the disk insertion side. When attached to the folded portion 9d, the folded portion 9d is compressed and engaged with the lower side of the ear piece 7a. The elastic force acts on the pressing piece 9e, causing the friction pad 8 to move in the disk rotation direction A and outside the disk. It acts as a component force that urges in the circumferential direction.

[0015] On the other hand, in the pad resilient portion 10f on the disk rotation side, the outer edge of the folded portion 10d is The bottom is tapered from the outer circumference of the disk to the inner circumference of the disk. Shown in Figure 4. In the developed view of the pad retainer 10, the pad resilient portion 10f is connected to the retainer portion 10b. The folded portion 9d protruding from the proximal end of the outer edge of the The pressing piece 10e bent toward the tip side of the retainer part 10b forms an L-shaped band. Ru. Similar to the disk insertion side, this strip has an oblique bent portion that becomes the folded portion 10d. The pressing piece 10e draws a conical trajectory using this bent part as a fulcrum, and the pad release is bent. When the retainer 10 is attached to the pad guide groove 3c on the disk rotation side, the ear piece 7b in a compressed state, and the elastic force of the folded portion 10d acts on the pressing piece 10e. and a component force that urges the friction pad 8 in the disk counter-rotation direction and in the disk inner circumferential direction. It works.

[0016] This embodiment is configured as described above, and the pad retainers 9 and 10 are Each friction pad 8 is attached to the retainer part 9b, 10b by attaching it to the pad guide groove 3c. When the ear pieces 7a and 7b are held, the urging forces of both the pressing pieces 9e and 10e work together. Then, center the friction pads 8, 8 at the middle position between the pad guide grooves 3c, 3c. do. Furthermore, on the disk insertion side, the component force of the pressing piece 9e pushes the lug 7a toward the retainer. As a force for pressing the upper side of 9b, the pad retainer 1 is further applied on the disk rotation side. The component force of the pressing piece 10e of 0 is the force that presses the ear piece 7b to the upper side of the retainer part 9b. In the setting state, the friction pads 8, 8 act as discreet Same as the rotational moment (counterclockwise in Fig. 1) generated by sliding contact with crator 2. It will be biased in the direction.

[0017] When the friction pads 8, 8 are set in this way, the friction pads 8, 8 may have excessive Check the braking operation, the μ change of the lining 6, the runout of the disc rotor 2, the unevenness of the surface, etc. Even if an overload is applied, the friction pads 8, 8 will not behave. , it is possible to effectively exert the set braking force from the initial stage of braking, and it also eliminates hitting noise and noise. Does not produce any abnormal noise such as noise. Moreover, the elastic force of these pressing pieces 9e and 10e is also the same as that of the ear piece 7a. , 7b should be light enough to not separate from the retainer parts 9b, 10b due to running vibrations. Therefore, the movement of the friction pads 8, 8 in the axial direction is not hindered.

[0018] Furthermore, in this embodiment, the pressing pieces 9e and 10e of the pad resilient parts 9f and 10f are Since it has both biasing forces in the disc circumferential direction and the disc radial direction, it is highly economical. In particular, the expanded shape of the pad resilient parts 9f, 10f is similar to the side edges of the retainer parts 9b, 10b. Since it becomes a strip that protrudes in an L-shape from It is easier to form than the shape, and requires only a small amount of cutting off, making it easier to remove the material. There is less waste.

[0019] Further, there is no need to twist the base ends of the pressing pieces 9e, 10e or the folded parts 9d, 10d. Since this twisting will not deteriorate due to repeated use, the biasing force in the two directions mentioned above will be increased. Can be kept in good condition for a long time. Furthermore, the tip sides of the pressing pieces 9e and 10e are attached to a retainer. If it is arranged so as to be inclined in the direction away from the parts 9b and 10b, it is possible to The rubbing pads 8, 8 are forcibly pressed by the pressing pieces 9e, 10e from the side of the disc rotor 2. Since it is pulled back, uneven wear due to dragging can be prevented.

[0020] In addition, the present invention has separate pad springing parts for the circumferential direction and the radial direction of the disk. Also, from the pad springing part on the disc rotation side, the disc can be rotated in the counter-rotation direction. There is no problem even if the biasing force is excluded. Furthermore, the lug of the back plate is not necessarily rotated with the disc rotation side. There is no need to make a different level from the exit side, and the pad spring part does not need to be housed inside the retainer part. Tomoyoshi.

[0021]

[Effect of the idea]

As explained above, the friction pad holding structure of the present invention allows the friction pad to be held in place by the pad elastic. The direction of the rotational moment generated by sliding contact with the disc rotor due to the elastic force of the firing part Since the force is applied in advance to the friction pad, excessive braking operation, μ change in the lining, Even if overload is applied due to disc rotor vibration or surface irregularities, Since no unnecessary behavior occurs in the friction pad, the set braking force is effective from the beginning of braking. In addition to this, the generation of abnormal noises such as hitting sounds and squealing is prevented.

[Brief explanation of drawings]

[Figure 1] Cross-sectional front view of a disc brake

[Figure 2] Perspective view of the pad retainer on the disk insertion side

[Figure 3] Developed view of the pad retainer in Figure 2

[Figure 4] Perspective view of the pad retainer on the disk rotation side

[Figure 5] Developed view of the pad retainer in Figure 4

[Explanation of symbols]

1... Disc brake, 2... Disc rotor, 3... Caliper bracket, 3a... Caliper support arm, 3c... Pad guide groove, 4... Caliper body, 6... Lining, 7...
Back plate, 7a...Lug piece on the disk rotation side, 7b...Large piece on the disk rotation side, 8...Friction pad, 9...Pad retainer on the disk rotation side, 10...Pad retainer on the disk rotation side.
Na, 9a, 10a... Connecting piece, 9b, 10b... U-shaped retainer part, 9c, 10c... Locking claw, 9d, 10d... Folded part, 9e, 10e... Pressing piece, 9f, 10f... Pad spring Part, A...Rotation direction of disc rotor 2

Claims (1)

[Scope of utility model registration request] Claim 1: Caliper support arms arranged in parallel in the disk axial direction outside the disk rotor are provided with opposing pad guide grooves, and a pad retainer is placed in each of these pad guide grooves to reduce friction. In a disc brake for a vehicle that holds ears protruding from both sides of the back plate of the pad, the friction pad is attached to one of the pad retainers arranged on the disc rotation side in the disc rotation direction. A pad resilient part is provided that biases the friction pad toward the outer circumference of the disk, and a pad resilient part that biases the friction pad toward the inner circumference of the disk is provided on the other pad retainer disposed on the disk rotation side. Friction pad retention structure for vehicle disc brakes featuring: