JPH04129936U - Vehicle disc brake - Google Patents

Abstract

(57) [Summary] [Purpose] To change the set load of the pad spring against the friction pad according to changing conditions. The pad springs are also shared with other car models along with the caliper body. [Structure] A sleeve 10 is inserted into a mounting portion 11b of a pad spring 11. This sleeve 10 is inserted over the shaft part 8b of the retaining pin 8 installed on the bridge part 3c of the caliper body 3, and the sleeve 10 is unrotatably sandwiched in the ceiling opening 3e. leg piece 11a of pad spring 11,
11a presses the upper surface of the back plate 7b, causing the friction pads 7, 7 to spring toward the center of the disk. Insertion hole 1 of sleeve 10
0a from the central axis and rotate the sleeve 10 around the shaft portion 8b of the retaining pin 8 to change the set load on the friction pad 7.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a disc brake mounted on various vehicles such as automobiles and motorcycles. - In detail, the ceiling opening formed in the bridge part of the caliper body. Regarding vehicle disc brakes in which the friction pads can be inserted and removed through the Ru.

0002

[Conventional technology]

When attaching and detaching the friction pads located on both sides of the disc rotor to the caliper body. In this case, the roof formed on the bridge part of the caliper body that straddles the outside of the disc rotor. Some types allow friction pads to be inserted and removed through the well opening.

0003 This friction pad locks the hanging arm on the upper part of the back plate to the bridge part, or It is supported by pad receiving arms protruding from the inner circumference of the disc of the caliper body, and Insert a hanger pin into the top of the board, or insert a retaining pin that catches the top of the back board. It is inserted into the edge part and is prevented from coming out.

0004

[Problem that the idea aims to solve]

Among these, the structure in which the friction pad is prevented from coming out with a retaining pin prevents running vibration and braking action. This prevents the back plate of the friction pad from hitting the retaining pin and causing contact noise. A structure in which the friction pad is bounced toward the center of the disc by a pad spring. is assumed.

[0005] In this case, the pad spring is designed to apply a constant load to the friction pad. Spring force and placement are set. However, this set load is At the beginning, the weight of the friction pad and the piston inserted into the cylinder hole are determined by external factors. This prevents the occurrence of so-called knockback, where the object is pushed back more than necessary. However, as the lining wears, the weight of the friction pad increases. As the friction pad becomes lighter, the set load of the pad spring becomes an overload on the friction pad. This causes a problem in that the movement of the friction pad deteriorates.

[0006] In addition, if this caliper body is shared with other car models, the friction pad is also applicable to the car model. The appropriate lining is selected, for example sintered lining and non-asbestos lining. Since the weight of the lining is different, this also allows for a wide variety of pad springs. I had to prepare.

[0007] This invention was developed in view of these circumstances, and its purpose is to , the set load set on the pad spring can be arbitrarily changed according to changing conditions. The pad spring can also be shared with the caliper body. The goal is to provide a structure that allows for this.

[0008]

[Means to solve the problem]

In accordance with the above-mentioned purpose, the present invention provides a caliper body that straddles the outside of the disc rotor. A ceiling opening is formed in the bridge part, and the friction pad is inserted and removed through the ceiling opening. The pads are locked to the caliper body on both sides of the disc rotor, and the friction pads are Insert a retaining pin into the bridge section through the ceiling opening in the axial direction of the disc. In a vehicle disc brake installed in the direction, the retaining pin is attached to the ceiling opening. Extrapolate a sleeve with the length of the mouth part in the disk axial direction, and insert the sleeve into the ceiling opening. A pad strip is held in the mouth part, and the sleeve also has a pad strip that bounces off the upper part of the friction pad. While engaging the pull, insert the insertion hole of the sleeve into which the retaining pin is inserted. It is characterized by being offset from the central axis.

[0009]

[Effect]

According to this configuration, by rotating the sleeve around the axis of the retaining pin, , the gap between the sleeve and the friction pad changes, and the pad spring against the friction pad changes. The load on the friction pad changes, e.g. due to lining wear, the weight of the friction pad changes. If so, the set load will be changed accordingly.

0010

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

[0011] The disc brake 1 has keys on both sides of a disc rotor 2 that rotates together with the wheel. The body halves 3a and 3b constituting the caliper body 3 are arranged facing each other, and the disk Connect two connecting bolts 4, 4 to each side of the bridge portion 3c that spans the outer circumference of the and that of the cylinder holes 5, 5 provided in these body halves 3a, 3b. The caliper body 3 is a piston facing type with a piston 6 inserted in each. A pair of mounting arms 3d (one not shown) extending from the vehicle body half 3a are bolted to the vehicle body. It can be installed by locking it.

0012 A rectangular ceiling opening 3e is formed in the bridge part 3c, and below the ceiling opening 3e, , a pair of friction pads 7, 7 are arranged opposite to each other with the disc rotor 2 in between. each The friction pad 7 includes a lining 7a that comes into sliding contact with the disc rotor 2, and a ceiling opening 3. It consists of a back plate 7b disposed between opposing walls 3f and 3f provided continuously on e. The lower corner of the back plate 7b is covered with pads that protrude from the lower ends of the opposing walls 3f, 3f. The receiving arms 3g, 3g support the disc so that it can move in the axial direction, and the ceiling opening It is designed to be inserted and removed through 3e.

[0013] The bridge portion 3c has a retainer for preventing the friction pad 7 disposed as described above from coming off. A female pin 8 extends through the ceiling opening 3e in the disk axial direction. Without this The stop pin 8 has a large diameter head 8a and a nut 9 screwed onto the tip of the shaft portion 8b. It is attached so as to sandwich the outside of the bridge part 3c divided by the well opening 3e. . In addition, when attaching the retaining pin 8 to the shaft portion 8b, the disk in the ceiling opening 3e is A cylindrical sleeve 10 having an axial length is inserted and the pin 8 is inserted as described above. By fixing it to the ceiling opening 3e, it is unrotatably inserted into the ceiling opening 3e.

[0014] The sleeve 10 is inserted into the sleeve 10 into which the shaft portion 8b of the retaining pin 8 is inserted. The through hole 10a is deviated from the central axis, and the end face 10b has serrations or an edge for preventing rotation. Embossed and matte finished. This sleeve 10 is used to tighten the nut 9. The bridge portion 3c deforms when braking torque is applied to the caliper body 3. In addition to securing rigidity to prevent the friction pad 7 from becoming It is also used to attach the pad spring 11 that springs into the air.

[0015] The pad spring 11 is made by bending the central part of an elastic plate into a chevron shape, and The legs are made to protrude slightly beyond the width of the elastic plate material to form the leg pieces 11a, 11a, and the bent top part Cut two slits in the length direction, and connect the two pieces on both sides to the one piece left in the center. The mounting portions 11b are curved downward so as to be substantially opposed to each other. This pad sp In the ring 11, the sleeve 10 before assembly is inserted into the mounting portion 11b in advance, and the sleeve 10 is inserted into the mounting portion 11b. - When the bulb 10 is inserted into the ceiling opening 3e as described above, both leg pieces 11a, 1 1a presses the top surface of the back plate 7b, causing the friction pads 7, 7 to bounce toward the center of the disc. (See Figures 1 to 3).

[0016] The load of the pad spring 11 on the friction pad 7 is due to the insertion hole of the sleeve 10. Since the sleeve 10a is offset from the central axis as described above, the sleeve 10 is prevented from coming out. The pin 8 rotates around the shaft 8b to change the gap between the sleeve 10 and the friction pad 7. It can be changed by changing the Pads set at the initial stage of assembly The initial set load of the pull 11 depends on the weight of the friction pad 7 and the knock bar of the piston 6. This is determined by taking into consideration various conditions such as prevention of locking, etc. Carving or printing marks, symbols, etc. on the circumferential surface makes it easier to configure settings according to various conditions. It is preferable that it can be done.

[0017] Since this embodiment is configured in this way, for example, the lining can be damaged by repeated use. If the weight of the friction pad 7 becomes lighter due to wear of 7a, remove the sleeve 10. At the same time, rotate the retaining pin 8 around the shaft 8b using the above-mentioned marked line or symbol as a guide. to change the set load. This allows the friction pad to be removed from the pad spring 11. The set load applied to the friction pad 7 is reset according to the change in the weight of the friction pad 7. The initial set load of the pull 11 does not act on the friction pad 7 as an overload. Become. Therefore, when the brake is released, the friction pad 7 is reliably pulled back from the disc rotor 2. This prevents uneven wear of the lining 7a due to dragging and prevents disc rotor Knockback of the piston 6 due to external factors such as distortion and deformation of the piston 2 can be effectively prevented. I can do that.

[0018] In addition, when the caliper body 3 of this embodiment is shared with other car models, the friction pad 7 also selects the lining 7a that matches the applicable vehicle model, so the material of the lining 7a Considering the various conditions including the friction pad weight due to the change, the pad for the friction pad 7 is adjusted. The load of the head spring 11 is set. This allows the lining material to In addition to changing the However, according to the structure of this embodiment, one pad spring 11 can be carried It is extremely economical because it can be used in common with Pabody 3.

[0019] In another embodiment shown in FIG. 5, the sleeve 20 has a square outer surface. The hole 20a is provided offset from the central axis, and the distance from the insertion hole 20a to the outer surface of the square is The separation is unequal, and marking lines and symbols are provided on each outer surface, and the end surface 20b is processed to prevent rotation. In this embodiment, the sleeve 20 is attached to the retaining pin. By rotating around the shaft, four loads can be set on the pad spring. Since it engages with the pad spring in a flat manner, the sleeve 20 does not apply unnecessary rotational force, and the elastic force is effectively applied to the pad spring. can be set.

[0020] In addition, in this invention, the outer shape of the sleeve is polygonal other than the circular or rectangular shape shown in the embodiment. It can also be used as a shape, and the engagement between the sleeve and the friction pad can also cause the friction pad to rebound. Any shape is fine.

[0021]

[Effect of the idea]

As explained above, this invention creates a ceiling opening in the bridge part of the caliper body. The retaining pin, which is installed through the disk in the axial direction, is Extrapolate a sleeve with a length of , hold the sleeve in the ceiling opening, and A pad spring that springs the upper part of the friction pad is engaged with the sleeve and removed. Since the insertion hole of the sleeve into which the locking pin is inserted is offset from the central axis, the sleeve Rotate the friction pad around the axis of the retaining pin to attach the friction pad to the pad spring. The load can be freely set to correspond to changes in the weight of the lining, preventing uneven wear of the lining. This can effectively prevent piston knockback. Also, this pad The pull can be shared with other car models along with the caliper body, so depending on the car model conditions. This eliminates the need to prepare multiple pad springs to match the Ru.

[Brief explanation of drawings]

[Figure 1] I-I sectional view in Figure 2

[Fig. 2] Partial cross-sectional plan view of a disc brake showing one embodiment of the present invention

[Figure 3] III-III sectional view in Figure 1

[Figure 4] Exploded perspective view of retaining pin, sleeve, pad spring, and nut

[Fig. 5] A perspective view of a sleeve showing another embodiment of the present invention.

[Explanation of symbols]

1... Disc brake, 2... Disc rotor, 3... Caliper, 3a, 3b... Body half, 3c... Bridge part, 3
e...ceiling opening, 3g...pad receiving arm, 7...friction pad, 7a...lining, 7b...back plate, 8...retention pin,
8b... Shaft of retaining pin 8, 9... Nut, 10... Three
10a...Insertion hole provided offset in sleeve 10, 10b...End face of sleeve 10, 11...Pad spring, 11a...Leg piece, 11b...Attachment part

Claims (1)

[Scope of utility model registration request] Claim 1: A ceiling opening is formed in the bridge portion of the caliper body that straddles the outside of the disc rotor, and friction pads inserted and removed through the ceiling opening are locked to the caliper body on both sides of the disc rotor. At the same time, in a vehicle disc brake in which a retaining pin for preventing the friction pad from being removed is installed in the bridge portion through the ceiling opening in the disc axial direction, the retaining pin is attached to the disc in the ceiling opening. Extrapolating a sleeve having an axial length, clamping the sleeve in the ceiling opening, and engaging the sleeve with a pad spring that springs the upper part of the friction pad, A disc brake for a vehicle, characterized in that an insertion hole of the sleeve into which the retaining pin is inserted is offset from a central axis.