JPH0526350Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a vehicle disc brake using a split caliper, and in particular, the brake torque of the friction pads generated during braking is supported by the caliper. This invention relates to a torque receiving structure.

[Conventional technology]

In a piston-opposed type disc brake, for example, as disclosed in Japanese Utility Model Application Publication No. 151444/1982, there are two
A caliper is constructed by connecting a pair of divided body halves with a plurality of connecting bolts.

A disc rotor is rotatably disposed in a rotor groove between both working parts covered by the bridge part, and a pair of friction pads is inserted between both working parts and the disc rotor, and one friction pad is inserted into the bridge part. It is suspended by a hanger pin so that it can move in the axial direction of the disk.

On the inner surface of each acting part, a torque receiving part that comes into contact with the disk insertion and retraction surfaces of the friction pad is protruded across the friction pad, and the braking torque generated during braking is transmitted through the torque receiving part. It is now being absorbed by Calipa.

By the way, in the above-mentioned structure, since the torque receiving part is provided only on the inner surface of both acting parts, in the case of a multi-plate disc brake in which a plurality of disc rotors are arranged between the body halves, the disc rotor It cannot bear the braking torque of the intermediate friction pads sandwiched between them.

For this reason, in a multi-plate disc brake in which disc rotors 2 and friction pads 3 are arranged alternately inside a caliper 1, as shown in FIG.
Engagement arms 4a and 4b that protrude toward the outer circumference of the disk and the circumferential direction of the disk, respectively, are provided on both upper sides of the caliper 1. There is a known device that engages with a corner and receives braking torque.

[The problem that the idea aims to solve]

However, in the former case, which has torque receiving parts on the inner surfaces of both acting parts, the protrusion of the torque receiving parts increases the weight of the caliper, makes the mold complicated and expensive, and makes it difficult to remove the caliper from the mold. The problem is that the commercialization rate is low. Further, since the torque receiving portion is formed by casting, it is necessary to perform finishing processing, and as described above, it cannot be applied to a multi-plate disc brake.

On the other hand, in the latter type, the caliper is generally made of a relatively soft aluminum alloy, so the inner corner of the opening that serves as a torque receiver is squeezed by the engagement arm of the friction pad during repeated braking, and the friction pad is damaged. This may adversely affect the sliding movement of the lining and may cause uneven wear on the lining. As a countermeasure to this problem, it is possible to interpose a retainer between the inner corner of the opening and the engaging arm of the friction pad, but this increases the number of parts and assembly man-hours, resulting in a high cost. high is unavoidable.

The present invention was developed against this background, and can be applied to both single-plate and multi-plate disc brakes, and can receive the braking torque of the friction pads without providing a special torque receiving part on the caliper. The purpose is to provide a torque receiving structure that can be used at low cost.

[Means to solve the problem]

In order to achieve the above object, the first means of the torque receiving structure according to the present invention is to construct a caliper by connecting a pair of divided body halves with a plurality of connecting bolts inserted in the disk axial direction. In a disc brake for a vehicle in which a friction pad is disposed movably in the disc axial direction on the side of a disc rotor which is rotatably disposed in a rotor groove of the caliper, the connecting bolt is inserted into the rotor groove on the outer periphery of the disc rotor. The upper surface of the friction pad is brought into contact with and supported by the exposed portion of the connecting bolt.

In the second method, a caliper is constructed by connecting a pair of divided body halves with a plurality of connecting bolts inserted in the disk axial direction, and a disk rotatably disposed in a rotor groove of the caliper. In a disc brake for a vehicle in which a friction pad is disposed on the side of the rotor so as to be movable in the disc axial direction, the connecting bolt is provided to be exposed in an opening formed in a bridge part of the caliper, and the coupling bolt is provided on the upper side of the friction pad. A hook-shaped arm piece is extended to the holder, and the inner corner of the arm piece is engaged with the exposed portion of the connecting bolt.

[Effect]

According to the above configuration, the braking torque generated in the friction pad due to the braking action is supported by the connecting bolt that comes into contact with the friction pad. Since the connecting bolt is exposed in the rotor groove or the opening of the bridge portion and is provided in the disc axial direction, it can also be applied to a multi-plate disc brake.

〔Example〕

Hereinafter, a first embodiment in which the first means of the present invention is applied to a single-plate disc brake will be described in Figs. 1 and 2.
This will be explained based on the diagram.

The disc brake 10 is a split type caliper 11
A piston-opposed type in which pistons (not shown) are provided facing each other in both the action parts 11c and 11d, respectively.
Bridge portion 11 spanning the outer periphery of the disk rotor 12
The body halves 11a and 11b of the caliper 11, which are divided into two at the center of e, have four connecting bolts 13 inserted in the disk axial direction into both sides of an opening 11f formed at the center of the bridge portion 11e. 13,
14, 14 are connected.

Both acting parts 11c covered by the bridge part 11e,
The disc rotor 12 is rotatably disposed in the rotor groove 11g between the rotor grooves 11d, and a pair of friction pads 15, 15 arranged opposite to each other with the disc rotor 12 in between is a hanger suspended in the center of the opening 11f. The disc brake 10 is suspended by a pin 16 so as to be movable in the axial direction of the disc.
is a disc rotor 12 that rotates in the direction of arrow A due to the pushing of a piston that moves forward due to the supply of hydraulic pressure.
Then, the friction pads 15, 15 are pressed against each other to perform a braking action.

Each friction pad 15 includes a back plate 17 suspended by the hanger pin 16, and a lining 18 pressed against the disk rotor 12 by the pushing of the piston.
It is made up of.

Each back plate 17 has a hanging part 17b at the center of the upper part that has a through hole 17a through which the hanger pin 16 is inserted, and engaging arms 17c, 17c that protrude toward the outer circumference of the disk on both sides of the upper part, and It is provided with an ear piece 17d that continues to the joint arm 17c and projects in the circumferential direction of the disk.

The connecting bolts 13, 13, 14, 14 are inserted into pin holes 11h drilled in the bridge portion 11e in the disk axial direction and screwed. Among these, the two inner connecting bolts 13, 13 disposed on the opening 11f side have their upper portions connected to the bridge portion 11e.
The friction pads 15 are provided in the meat part of the rotor groove 11g, and the lower part on the disk rotor 12 side is exposed to the rotor groove 11g, and each friction pad 15, which is suspended by the hanger pin 16 as described above, is attached to the engaging arms 17c, 17c. The outer surface of the ear piece 1 on both sides is brought into contact with the inner surface of the opening 11f.
The upper surfaces of the coupling bolts 7d and 17d are placed in contact with the lower surfaces of the exposed portions of the connecting bolts 13 and 13.

Disc brake 10 configured as above
During the above-mentioned hydraulic operation, the braking torque generated on the friction pads 15, 15 due to sliding contact with the disc rotor 12 rotating in the direction of arrow A causes both pads 15, 15 to move around the hanger pin 16 as a fulcrum. It acts as a moment to rotate clockwise in Figure 1.

Each friction pad 15 is connected to the engagement arm 1 as described above.
7c is abutted against and supported by the side surface of the opening 11f, and the lug 17d is abutted against and supported by the exposed portions of the connecting bolts 13, 13, respectively. Further, the rotating side of the disk is supported by the connecting bolts 13 and absorbed into the caliper 11.

As described above, according to this embodiment, the caliper is
Braking torque can be reliably supported without increasing the weight of the vehicle.

Furthermore, in the caliper 11, it is only necessary to change the position of the pin hole 11h through which the connecting bolt 13 is inserted, and since the mold can be a conventional mold that can be easily cut out, the mold cost is low and the production rate is low. Good too. Moreover, prying of the caliper 11 and uneven wear of the lining 18 are prevented, and the friction pad 15 can slide smoothly.

In this embodiment, the engaging arm 17c that contacts the opening 11f of the bridge portion 11e is provided on the back plate 17 in order to more reliably support the braking torque. The braking torque can be sufficiently supported by only the contact between the two.

FIG. 3 shows a second embodiment in which the first means of the present invention is applied to a multi-plate disc brake, in which a split caliper 20 is connected to the body halves 20a and 20b by a plurality of connecting bolts 21. The two disk rotors 2 are placed in the rotor groove 20f covered by the bridge portion 20e between the two working portions 20c and 20d.
2, 22 and three friction pads 23, 24, 23 are arranged alternately.

A friction pad 23 arranged on the outside of the disc rotor 22 has a lining 26 on one side of the back plate 25.
The intermediate friction pad 24 disposed between both day rotors 22, 22 has linings 26, 26 on both sides of the back plate 25, and the upper center of each back plate 25 is connected to the first As in the embodiment, it is suspended by hanger pins (not shown).

A plurality of connecting bolts 2 inserted through pin holes 20g
1 is provided with its lower part exposed to the rotor groove 20f on the outer periphery of the disc rotor, and the friction pad 2
3, 24, 23, the upper surface of each back plate 25 is supported in contact with the lower surface of the connecting bolt 21, and the braking torque generated in these friction pads 23, 24, 23 during braking is supported by the connecting bolt 21. be done.

In both of the above embodiments, the connecting bolts 13, 21 are
Only the lower part that contacts the back plates 17 and 25 is rotor groove 1.
1g and 20f, but the rotor grooves 11g and 2
The entire part may be exposed within 0f, or if the connecting bolts 13 and 21 are placed directly above the back plate 25 and directly receive the upper parts of the back plates 17 and 25,
Since the tabs on the back plate are no longer necessary, weight and cost reductions can be achieved.

4 and 5 show the second means of the present invention,
A third embodiment is shown which is applied to a multi-plate disc brake, and a split caliper 30 consisting of two body halves 30a and 30b has a bridge part 30e,
4 pin holes 30h drilled in the disk axial direction
Connection bolts 31, 31, 32, 32 inserted into
are connected by screwing them together.

Bridge portion 30 between both acting portions 30c and 30d
In the rotor groove 30f covered by e, two disc rotors 33, 33 and three friction pads 34, 3
5 and 34 are arranged alternately. The friction pad 34 arranged on the outside of the disc rotor 33 is
The back plate 36 and the lining 37, and the intermediate friction pad 35 are connected to the back plate 36 and the linings 37, 37.
The upper center of each back plate 36 is suspended by a hanger pin 38, and the hanger pin 38
A pad spring 39 is compressed between the upper surface of the back plate 36 and the upper surface of the back plate 36.

The two inner connecting bolts 31, 31 disposed on the opening 30g side of the bridge part 30e have an upper part and one side on the opening 30g side exposed to the opening 30g, and the other parts are exposed on the opening 30g side. It is provided within the flesh part of the portion 30e.

On the other hand, on both sides of the upper part of each back plate 36, hook-shaped arm pieces 36a, 36a, which protrude toward the outer circumferential direction of the disk and bend further outward, extend respectively, and the friction pads 34, 35, 34, The inner corner portion 36b of the arm piece 36a is provided so as to be engaged with the exposed portion of the connecting bolts 31, 31 in a hanging manner.

The braking torque generated in the friction pads 34, 35, 34 due to sliding contact with the disc rotors 33, 33 is applied to both pads 35, 34 with the hanger pin 38 as a fulcrum.
35 in the clockwise direction in FIG. are respectively supported on one side of the exposed portion of the caliper 30, and are further absorbed into the caliper 30.

The connecting bolt 31b of this embodiment also has a bridge portion 3.
The entire arm 36a may be exposed within the opening 30g of the arm 0e, and the arm 36a may also have a hook shape other than the above.

[Effects of the invention] As described above, the torque receiving structure of the present invention has a connecting bolt that connects the caliper body halves exposed in the rotor groove on the outer periphery of the disc rotor, and friction is applied to the exposed portion of the connecting bolt. Either the upper surface of the friction pad is brought into contact with the friction pad, or the connecting bolt is exposed through an opening formed in the bridge part of the caliper, and a hook-shaped arm piece is extended from the upper side of the friction pad, and the inner part of the arm piece is placed in contact with the upper surface of the friction pad. Since the corner part engages with the exposed part of the connecting bolt to receive the braking torque, the weight of the caliper is not increased by adding a torque receiving part or increasing the number of parts, and the braking torque is reliably supported. In particular, it is suitable as a torque receiving structure for a multi-disc brake having a plurality of disc rotors and friction pads.

In addition, it prevents the caliper from twisting and the lining from wearing unevenly, allowing the friction pad to slide smoothly.Furthermore, since the mold can be a conventional mold that can be easily removed, mold costs can be reduced. It is cheap and has a good commercialization rate.

Furthermore, since the torque receiving part is a connecting pin, the finishing work conventionally required for the torque receiving part can be omitted, and costs can be reduced.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a cross-sectional side view of a single disc brake, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a second embodiment of the invention. 4 and 5 show a third embodiment, FIG. 4 is a sectional side view of a multi-disc brake, and FIG. 5 is a cross-sectional view of FIG. 4. FIG. 6 is a sectional front view of a conventional disc brake. DESCRIPTION OF SYMBOLS 10...Disc brake, 11...Caliper, 11a, 11b...Body half forming the caliper 11, 11c, 11d...Action part, 11e
...Bridge part, 11g...Rotor groove, 11f...
...Opening, 11h...Pin hole, 12...Disc rotor, 13, 14...Connection bolt, 15...Friction pad, 16...Hanger pin, 17...Back plate, 17c...Engagement arm, 17d ...Ear piece.

Claims (1)

[Claims for Utility Model Registration] 1. A caliper is constructed by connecting a pair of divided body halves with a plurality of connecting bolts inserted in the disk axial direction, and the caliper is rotatably disposed in a rotor groove of the caliper. In a disc brake for a vehicle in which a friction pad is disposed on the side of a disc rotor so as to be movable in the disc axial direction, the connecting bolt is provided to be exposed in a rotor groove on the outer periphery of the disc rotor, and the connecting bolt is provided in an exposed portion of the disc rotor. A torque receiving structure for a disc brake for a vehicle, characterized in that the upper surface of a friction pad is abutted and supported. 2. A caliper is constructed by connecting a pair of divided body halves with a plurality of connecting bolts inserted in the disk axial direction, and a side part of the disk rotor rotatably disposed in the rotor groove of the caliper, In a disc brake for a vehicle in which a friction pad is disposed so as to be movable in the disc axial direction, the connecting bolt is provided to be exposed in an opening formed in a bridge part of the caliper, and a hook-shaped arm piece is provided on the upper side of the friction pad. A torque receiving structure for a disc brake for a vehicle, characterized in that an inner corner of the arm piece is engaged with an exposed portion of the connecting bolt.