JPH04127437U - Assembly structure of friction pad and shim plate of vehicle disc brake - Google Patents

Abstract

(57) [Summary] [Purpose] While allowing movement of the friction pad during braking, minimizing misalignment between the shim plate and the pad pushing member to prevent brake squeal and wear and tear on the tip of the pad contact member. . [Structure] A pair of stoppers 10c, 10c are provided on the side end surface 10a of the back plate 10 of the friction pad 7 on the disk outer circumference side, and a pair of stoppers 10d, 10c are provided on the side end surface 10b of the disk inner circumference side.
0d are respectively spaced apart and protrudingly provided. The plate body 12a of the outer shim 12 has an elastic locking portion 12b, 1 protruding from the center of the upper edge.
2b, and elastic locking portions 12c, 1 protruding from both sides of the lower edge.
2c is provided. The elastic locking portions 12b and 12c are composed of a flat plate portion 12d and a semicircular claw piece 12e. The outer shim 12 is brought into close contact with the plate body 11a of the inner shim 11 assembled on the back surface of the back plate 10, and the elastic locking portions 12b, 12 at the center of the upper edge are attached.
b is arranged between the stoppers 10c, 10c on the outer circumferential side of the disk, each claw piece 12e is brought into contact with the opposing surface of the stopper 10c and the side end surface 10a, and the elastic locking parts 12c, 1 on the lower edge are arranged.
2c is disposed outside the stoppers 10d, 10d on the inner circumferential side of the disk, and each claw piece 12e is assembled so as to come into contact with the opposite surface of the stopper 10d and the side end surface 10b.

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 how to assemble the friction pad and shim plate used in this disc brake. Regarding structure.

0002

[Conventional technology]

Friction pads placed on the side of the disc rotor are used to prevent pistons and carriers during braking. When the pad pushing member such as the reaction claw of the pad is pushed, the pad pushing member moves in the disk axial direction. In contrast, the friction pad moves the disc by sliding into contact with the disc rotor. This is because the disc moves as if floating toward the outer circumference while being dragged in the direction of rotation. , an abnormal noise called brake squeal may occur. For this reason, for example, the actual fairness As shown in Publication No. 2-44106, a shim plate is attached to the back of the back plate and this Techniques for preventing this are known.

0003 This technology covers the shim plate with an elastic material coating shim on the back side of the back plate. The coating shim and the metal plate each have a back plate. A plurality of elastic legs are protruded to sandwich the side end surfaces of the outer circumferential side of the disk and the inner circumferential side of the disk. and at least the side edge surfaces of the back plate on the outer circumferential side of the disk and the inner circumferential side of the disk. Place the coating shim and the elastic legs of the metal plate on one side end face in the direction of rotation of the disc. A positioning protrusion is provided to protrude in the radial direction of the disk.

0004

[Problem that the idea aims to solve]

However, the elastic legs provided on the elastic material coating shim and the metal plate are not elastic. However, depending on the material, the back plate may be slightly bent in the radial direction of the disc. It merely prevents the elastic material coating shim and metal plate from falling off from the back. The friction pad, elastic material coating shim, and metal plate are connected by engagement with the protrusion on the plate. Ensure that there is no relative deviation in the direction of rotation, and that these three components move together during braking. The part that comes into contact with the pad pushing member and receives the pushing force is The back plate was simply replaced with a metal plate.

[0005] Therefore, the metal plate on the outside of the back plate is integrated with the friction pad and moves in the axial direction of the disc. There is no change in the fact that the pad is dragged while rubbing against the moving pad pushing member, and the area is small. Brake squeal occurs because the small-area piston and reaction claw come into contact with the wide metal plate. This has the disadvantage that it becomes easier to press the pad, and the tip of the pad pressing member is also subject to considerable wear and tear.

[0006] Therefore, this invention allows the movement of the friction pad during braking while also allowing the shim plate and pad to move. By minimizing misalignment with the pad pushing member, brake squeal is sufficiently prevented, and the pad is The disc brake caliper body is designed to prevent wear and tear on the tip of the pad contact member. is intended to provide.

[0007]

[Means to solve the problem]

In accordance with the above-mentioned purpose, the present invention provides a friction pad for vehicles equipped with a shim plate on the back side of the back plate. In a disc brake, the side edges of the outer circumferential side of the disc and the inner circumferential side of the disc of the back plate A pair of stoppers are provided spaced apart from each other on the surface, and each stopper is provided on the shim plate. a side end surface, and an opposing surface or opposite surface of the pair of stoppers provided on the side end surface; The disc rotates between the friction pad and the shim plate while holding the back plate by contacting both sides of the shim plate. It is characterized by the formation of an elastic locking part that allows relative deviation in the disk direction and the disk radial direction. That is.

[0008]

[Effect]

When the friction pad comes into sliding contact with the disc rotor, the friction pad has a disc rotor. However, the pushing force of the pad pushing member is applied to the shim plate. Since they try to secure their current position, a displacement force is generated between the two. This allows For the friction pad, leave the shim plate in place and rotate the disc while bending the elastic locking part of the shim plate. It moves in the direction of rotation and the outer circumference of the disk. The shim plate is almost the same as the pad pushing member. There is no misalignment, or even if there is misalignment, the amount is very small, and the difference in area between the shim plate and the tip of the pad pushing member is large. This reduces the possibility of brake squeal even when the brakes are The tip of the moving member is less likely to wear out.

[0009]

【Example】

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

0010 The caliper body 2 used in the disc brake 1 is part of the disc rotor 3. The caliper bracket 4, which is fixed to the vehicle body on the side, is connected to the caliper bracket 4 through a sliding pin (not shown). A floating caliper that is guided in the direction of the disc axis and is placed across the disc rotor 3. A bridge portion that straddles the outer circumference of the disc rotor 3 connects the acting portion 2a and the reaction portion 2b. It has a structure connected by 2c.

[0011] A cup-shaped piston 6 is inserted into the cylinder hole 5 formed in the action part 2a. , and a reaction claw 2d is provided on the reaction part 2b on the opposite side, and these pistons A pair of friction pads 7, 7 are provided between the ring 6 and the reaction claw 2d to rotate the disc rotor 3. It is provided so that it can be sandwiched and moved in the disk axial direction.

0012 A hydraulic chamber 8 is defined between the cylinder hole 5 and the bottom of the piston 6. When the pressurized hydraulic fluid is supplied, the piston 6 moves forward through the cylinder hole 5 to open the working part. The friction pad 7 on the side is pressed against one side of the disc rotor 3, and this reaction also causes the cap to The lipper 2 moves toward the action part, and the reaction claw 2d depresses the friction pad 7 on the reaction part side. It is pressed against the other side of the scroller 3.

[0013] The friction pad 7 has a lining 9 that comes into sliding contact with the disc rotor 3 and a caliper 2. The back plate 10 to be held is joined to the - Two shim plates, inner shim 11 and outer shim 12, are assembled to prevent squealing. It will be done.

[0014] The inner shims 11 are bent to one side on both sides of the upper and lower edges of the plate body 11a. It has a pair of locking pieces 11b, 11b that protrude. On both sides of the plate 11a , is coated with an elastic material 13, 13 such as rubber or soft synthetic resin, and this elastic The flexible materials 13 and 13 suppress vibration during braking and at the same time further reduce brake squeal. We are trying to prevent it.

[0015] In addition, the outer shim 12 is a shim plate in the present invention, and the back shape of the back plate 10 is approximately the same as that of the outer shim 12. A plate body 12a formed in the same shape, and a plate body 12a bent from the center of the upper edge to one side. , a pair of elastic locking portions 12b, 12b protruding outward from both ends thereof; It bends from both sides of the lower edge of the plate body 12a in the same direction as the elastic locking parts 12b, 12b. A pair of elastic locking parts 12c, 12c protrude from the tip so as to face each other inwardly. It has become. The upper and lower four elastic locking parts 12b, 12b, 12c, 12c are flat plate parts. The tip end of 12d is rounded into a semicircular shape to form a claw piece 12e, and a flat part connected to the plate 12a is formed. The elastic force of the plate portion 12d allows the claw piece 12e to move in the vertical direction. e itself is now able to expand and contract by bending in and out of a semicircle perpendicular to this. There is.

[0016] On the other hand, the back plate 10 to which the inner shim 11 and the outer shim 12 are assembled has a disk outer peripheral side. A pair of stoppers 10c, 10c are provided on the side end surface 10a of the disc, and a pair of stoppers 10c are provided on the side end surface 10a of the disk. A pair of stoppers 10d, 10d are provided on the surface 10b and protrude apart from each other. , the above-mentioned inner shim 11 brings the plate body 11 into close contact with the back surface of the back plate 10, and the locking piece 1 on the upper edge 1b, 11b with stoppers 10c, 10c sandwiched between the side end surfaces 10a on the outer peripheral side of the disk. While looking at the disk, lock the locking pieces 11b, 11b on the lower edge to the side end surface 10 on the inner peripheral side of the disk. b, and is assembled so as to surround the back plate 10.

[0017] In addition, the outer shim 12 has a plate 12a in close contact with the plate 11a of the inner shim 11, and The center elastic locking portions 12b, 12b are connected to the stoppers 10c, 10c on the outer peripheral side of the disk. Each claw piece 12e is placed between the stopper 10c and the side end face 10a. the elastic locking parts 12c, 12c on the lower edge to the stoppers 10d, 12c on the inner peripheral side of the disk. 10d, each claw piece 12e is placed on the opposite surface of the stopper 10d and the side end surface 1. 0b, and is assembled so as to enclose the back plate 10.

[0018] As described above, the inner shim 11 assembled to the back plate 10 has the locking pieces 11b on the upper edge, 11b is fixed across the stoppers 10c and 10c on the outer circumferential side of the disk, so that friction is prevented. It moves together with the rubbing pad 7. The outer shim 12 also includes stoppers 1 on the inner and outer peripheries of the disk. Elastic locking portions 12b on the upper and lower edges provided in contact with 0c, 10c, 10d, and 10d , 12b, 12c, and 12c have elastic force, so the friction pad 7 and inner shim 11 It is mounted so that it can be displaced relative to the other. Note that one side of the inner shim 11 rubs against the outer shim 12. It is preferable that the elastic material 13 on one side is finished as smooth as possible.

[0019] In this way, the friction pad 7 has an inner shim 11 and an outer shim 12 on the back side of the back plate 10. It is assembled and attached to the caliper 2, and the friction pad 7 is moved to the disc by braking operation. - When sliding on the disc rotor 3, the friction pad 7 and inner shim 11 cause the disc rotor 3 to drag. However, the pushing force of the piston 6 and reaction claw 2d is applied to the outer shim 12. In order to secure the current position, a displacement force is generated between the inner shim 11 and the outer shim 12. Jiru. As a result, the stoppers 10c and 10d on the disk rotation side and the side end surface 10a, 10b deforms the elastic locking portions 12b and 12c that come into contact with the friction pad. The pad 7 and the inner shim 11, leaving the outer shim 12, are aligned in the disc rotation direction and the disc outer periphery. move in one direction.

[0020] Next, when this braking operation is released, the outer shell returns to its original shape due to the elimination of the dragging torque. The elastic locking portions 12b and 12c of the arm 12 are connected to the stoppers 10c and 10d of the back plate 10 on the side. Push back the end surfaces 10a and 10b, and move the friction pad 7 and inner shim 11 in the opposite direction from when braking. direction to return to the no-load position before braking.

[0021] In this embodiment, the pad is pressed against the pad pushing members such as the piston 6 and the reaction claw 2d. The outer shim 12, which is attached to the Since only a very small amount is required, the area between the outer shim 12 and the tip of the piston 6 and reaction claw 2d Even if the difference is large, brake squeal is less likely to occur, and contact with the outer shim 12 is reduced. The piston 6 and the tip of the reaction claw 2d are less likely to be worn out.

[0022] Furthermore, the elastic locking portions 12b and 12c of the outer shim 12 engage with the friction pad 7 during braking. The contact between the caliper 2 and the torque receiving part is softened to prevent and control the contact noise. When the brake is released, the friction pad 7 is forcibly returned to the no-load position before braking. There is less risk of the lining 9 being dragged by the disc rotor 2.

[0023] As mentioned in the examples, of the two shim plates, the inner shim and the outer shim, the outer shim is Only the inner shim is the shim plate in the present invention, and the inner shim may be omitted. Matako The elastic locking part of the shim plate and the stopper of the back plate may also have shapes other than those in the example. For example, the stopper on the back plate can be a groove.

[0024]

[Effect of the idea]

As described above, the present invention has two parts: A pair of stoppers is provided at a distance from each other on the side end surface of the The shim plates each include the side end surfaces and the pair of stocks provided on the side end surfaces. The friction pad and the shim are held in contact with the opposing surface of the pad and the opposite surface of the shim. An elastic locking part that allows relative deviation from the plate in the disc rotational direction and disc radial direction. Since the shim plate is pressed by pad pushing members such as pistons and reaction claws, the pad The shim plate does not shift from the pad pushing member, or even if it does, it only shifts by a small amount. Brake squeal will not occur even if there is a large difference in area between In addition, the tip of the pad pushing member that comes into contact with the shim plate is less likely to be worn out.

[0025] Furthermore, the elastic locking part of the shim plate absorbs the torque of the friction pad and caliper during braking. It softens the contact with the parts and prevents contact noise, and also uses friction pads when releasing the brake. The lining is forcibly returned to the no-load position before braking, so the lining is There is less risk of it being dragged along the road.

[Brief explanation of drawings]

[Figure 1] Rear view of a friction pad with inner and outer shims assembled on the back of the back plate

[Figure 2] Cross-sectional front view of a disc brake using the friction pad in Figure 1

[Figure 3] Exploded perspective view of friction pad, inner shim, and outer shim

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Disc brake, 2... Caliper body, 2a... Action part, 2b... Reaction part, 2d... Reaction claw, 3... Disc rotor, 7... Friction pad, 9... Lining, 10... Back plate,
10a... Side end surface of the back plate 10 on the disk outer circumferential side, 10b...
A side end surface of the back plate 10 on the inner circumference side of the disk, 10c...A stopper protruding from the side end surface 10a on the outer circumference side of the disk, 10d...
a stopper protruding from the side end surface 10b on the inner peripheral side of the disk;
11...Inner shim, 11a...Plate body, 11b...Locking piece, 12...
Outer shim, 12a...plate body, 12b, 12c...elastic locking part,
12d...flat plate portions of elastic locking parts 12b, 12c, 12e...
Claw pieces of elastic locking parts 12b, 12c, 13...elastic material

Claims (1)

[Scope of utility model registration request] Claim 1: A disc brake for a vehicle equipped with a shim plate on the back surface of a back plate of a friction pad, in which a pair of stoppers are provided at spaced intervals on side end surfaces of the outer circumferential side of the disk and the inner circumferential side of the disk, respectively. and each of the shim plates holds a back plate by abutting both the side end faces and opposing faces or opposite faces of the pair of stoppers provided on the side end faces,
An assembly structure of a friction pad and a shim plate for a vehicle disc brake, characterized in that an elastic locking portion is formed to allow relative deviation between the friction pad and the shim plate in the disk rotational direction and the disk radial direction. .