JPH084808A - Disc brake - Google Patents

Abstract

PURPOSE:To provide a disc brake capable of preventing generation of abnormal noise such as pad rattling. CONSTITUTION:A disc brake is provide with an outward protruding part 31, which is protruded along the outward side in the disc radius direction of an extension part 24, on both end parts 27 of a pad 13 which is arranged so as to guide both end parts 27 to mutually opposing sides of the extension part 24 of a carrier 12, and also with an inward protruding part 36 which is protruded along the inward side in the disc radius direction of the extension part 24 and guided to the inward side in the disc radius direction of the extension part 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake used for braking a vehicle or the like.

[0002]

2. Description of the Related Art As a disc brake used for braking a vehicle or the like, the applicant of the present invention considered a disc brake having a structure shown in FIGS. This disc brake is disc 5
1 has a carrier 53 having a pair of extending portions 52 extending over the outer circumference of the disc 51 along the disc axial direction, and both end portions 54 on opposite sides of the extending portions 52. The outer protruding portion 55 is arranged so as to be guided and is provided at both ends 54 so as to protrude along the disk radial direction outer side of the extending portion 52.
5 is provided with a pad 56 which is guided to the outer side of the extending portion 52 in the radial direction of the disk. Here, the disc brake has a biasing portion 58 of a pad spring 57 that biases the pad 56 inward in the disc radial direction.
Are provided on the outer side in the disk radial direction of the outer protruding portion 55 of the pad 56.

[0003]

In the above disc brake, the pad 56 is guided to the extending portion 52 only at the end portion 54 and the outer protruding portion 55, so that when the vehicle vibrates or the like. It is expected that an abnormal noise such as a pad rattle noise will be generated due to easy movement in a direction other than the guide direction, and there was room for further improvement in this respect. Therefore, an object of the present invention is to provide a disc brake capable of preventing the generation of abnormal noise such as pad rattle noise.

[0004]

In order to achieve the above object, a disc brake according to claim 1 of the present invention is arranged on one side of a disc and extends beyond the outer periphery of the disc along the disc axial direction. A carrier having a pair of extending portions that are present, and both end portions are arranged so as to be guided to mutually opposing sides of both extending portions, and both end portions project along the disk radial direction outer side of the extending portions. A pad provided with an outer protruding portion and guided to an outer side of the extending portion in the disk radial direction at the outer protruding portion, and at both ends of the pad, an inner side of the extending portion in the disk radial direction. It is characterized in that an inner protruding portion is provided so as to protrude along the inside of the extending portion and guided to the inner side of the extending portion in the disk radial direction.

According to a second aspect of the present invention, in addition to the first aspect, the disc brake is provided between the inner side of the extending portion in the radial direction of the disc and the inner protruding portion of the pad. It is characterized in that a biasing portion is provided for biasing the pad inward in the disk radial direction.

According to a third aspect of the present invention, in addition to the first or second aspect, the inner side of the extending portion in the radial direction of the disc is a continuous flat surface or curved surface along the outer circumference of the disc. It is characterized by being.

[0007]

According to the disc brake of the first aspect of the present invention, both ends of the pad are guided to the mutually opposing sides of the two extending parts, and the extending part of the extending part is provided at the outer protruding parts provided at the both ends. Guided to the outside in the radial direction of the disc,
The inner protrusions provided at both ends are guided inward in the disc radial direction of the extending part and move in the disc axial direction.Therefore, even when vibration occurs, movements other than the disc axial direction can occur. Regulated.

According to the disc brake of claim 2 of the present invention, the urging portion for urging the pad inward in the disc radial direction has the urging portion inwardly of the extending portion in the disc radial direction and the inside of the pad. Since it is provided between the protrusion and the protrusion, there is no fear of interference with the inner circumference of the wheel as in the case where the protrusion is provided on the outer side in the disk radial direction.

According to the disc brake of the third aspect of the present invention, the inner side of the extending portion in the radial direction of the disc is a continuous flat surface or curved surface along the outer periphery of the disc. Also, it can be formed by one-time machining together with the portion for guiding the outer protruding portion on the disk radial direction side.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disc brake according to a first embodiment of the present invention will be described below with reference to FIGS. In the drawing, reference numeral 11 is a disk that rotates with the wheel, reference numeral 12
Is a carrier fixed to a non-rotating portion of the vehicle, reference numeral 13
Are a pair of pads, which are arranged on both sides of the disk 11 and are supported by the carrier 12 so as to be slidable in the axial direction of the disk 11, and which are composed of a backing metal 13a and a friction material (not shown). 12 shows a caliper that is slidable in the axial direction of the disk 11 by fitting a pin 17 into a slide pin hole 16 formed in 12 and sliding the pin 17 in the slide pin hole 16.

When the brake pedal (not shown) is depressed, the disc brake is provided on the other side so as to face the piston (not shown) provided on one side through the bridge portion 19 of the caliper 15 and the piston. Nail part 2
0 and both pads 13 through the disc 11 to the back metal 13a
It is clamped from the side to press them against the disc 11, whereby the friction material (not shown) of both pads 13 and the disc 11 are pressed.
And are brought into contact with each other to generate a frictional force therebetween to weaken the rotation of the wheels and brake the vehicle.

The carrier 12 has a substantially straight long side portion 22.
And a pair of short side portions 23 extending from both ends of the long side portion 22 to substantially the same vertical side, and the long side portion is provided on one side of the disk 11 when mounted on the vehicle. 22 for disk 1
1 is located inside the outer peripheral portion of the disk 1 in the radial direction of the disk, and the tip side of the short side portion 23 is arranged so as to project outward from the outer peripheral portion of the disk 11. Note that the following description will be made on the condition when the vehicle is mounted. At the outer ends of both short side portions 23 in the disc radial direction, extending portions 24 extending over the outer peripheral portion of the disc 11 along the disc axial direction are formed over the entire length of the carrier 12 in the disc axial direction. The extending portion 24 has a shape extending from the short side portion 23 to the other short side portion 23 side by a predetermined amount. Further, the slide pin hole 16 is formed in the extending portion 24 along the disc axial direction. The slide pin hole 16 is bored from the short side portion 23 side at a substantially central position of the width of the extending portion 24 in the disk radial direction. It should be noted that a part of the extending portion 24 is on a straight line connecting the center of the slide pin hole 16 and the disc center 25, and is in a positional relationship of being sandwiched between the slide pin hole 16 and the disc 11.

The opposite sides of the extending portions 24 are formed in a planar shape which is continuous along the disc axial direction and over the entire length of the extending portions 24 in the same direction and which are parallel to each other. It is a part 26. These torque receiving portions 26 are provided with the respective end portions 27 in the disk circumferential direction which are parallel to each other of the backing metals 13a of both pads 13,
The flat plate-shaped intervening plate portion 29 of the pad spring 28 is abutted between them so as to receive the torque of both pads 13 at the time of disc contact. In the torque receiving portion 26, the end portion 27 of the back metal 13a of the one pad 13 contacts the short side portion 23 side of the extending portion 24, and the end 27 of the back metal 13a of the other pad 13 extends to the leading end side. I am in contact.

In addition, the outer portion of the extending portion 24 outside the torque receiving portion 26 in the radial direction of the disc has a planar shape that is continuous along the disc axial direction and continuous over the entire length of the extending portion 24 in the same direction. Information section 31
Are formed orthogonal to the torque receiving portion 26. In accordance with this, at both end portions 27 of the backing metal 13a of both pads 13, an outer protruding portion 32 is formed at both outer end positions in the disc radial direction so that the inner surface of the disc radial direction projects along the outer guide portion 31. On the other hand, the pad spring 28 is bent along the outer guide portion 31 from the outer side of the intervening plate portion 29 along the torque receiving portion 26 in the disk radial direction, and is further curved so as to cover the outer protruding portion 32. The outer plate portion 33 has a shape having an outer plate portion 33 and a biasing plate portion 34 provided on the opposite side of the outer plate portion 33 with respect to the intervening plate portion 29 and biasing the outer protruding portion 32 from the outer side in the disk radial direction. There is.

In the first embodiment, the extension portion 2
The disk pass portion 35, which has a planar shape and extends along the disk axial direction and is continuous over the entire length of the extending portion 24 in the same direction, is provided on the inner side of the torque receiving portion 26 of No. 4 in the outer peripheral portion of the disk 11. It is formed along. Further, in the first embodiment, an inner protruding portion 36 is formed at the inner end position of both ends 27 of the backing metal 13a of both pads 13 in the disk radial direction so that the disk radial outer surface projects along the disk path portion 35. The back metal 13a of the pad 13 is formed.
The extension portion 24 is nested in the end portion 27 of the. In accordance with this, pad spring 28
Has a shape having an inner plate portion 37 bent along the disc path portion 35 from the inner side of the intervening plate portion 29 along the torque receiving portion 26 in the disc radial direction.

In the state where the pad 13 is attached between the two extending portions 24 with the pad spring 28 interposed, the movement of the pad 13 between the inner projecting portion 36 and the inner plate portion 37 of the pad spring 28 is performed. Some clearance is provided for smoothness (see Fig. 2).

According to the disc brake of the first embodiment having such a configuration, when the caliper 15 presses the back metal 13a of the pad 13, the end 27 of the back metal 13a is the torque receiving surface of the extending portion 24 facing each other. The pad spring is guided to the portion 26 via the intervening plate portion 29 of the pad spring 28, and the outer projection portion 32 provided on the end portion 27 is fitted to the outer guide portion 31 on the outer side in the disk radial direction of the extending portion 24. Two
8 is guided through the outer side plate portion 33, and further, the end portion 27
In the inner protruding portion 36 provided at the inner side portion 37 of the pad spring 28, it is guided by the disc path portion 35 on the inner side in the disc radial direction of the extending portion 24 and moves in the disc axial direction. Therefore, even when vibrating, movements other than the disc axial direction are restricted.
Therefore, it is possible to prevent abnormal noise such as pad rattle noise.

Here, since the extending portion 24 is a plane in which the disc path portion 35 on the inner side in the disc radial direction is along the outer periphery of the disc 11 and is continuous with the entire length of the carrier 12 in the disc axial direction, the torque is increased. Similarly, since the receiving portion 26 and the outer guide portion 31 are flat surfaces that are continuous with the entire length of the carrier 12 in the disc axial direction,
It can be formed by a single process using a tool such as a broach cutter 41 having a recess 40 having a complementary shape with the disc path portion 35, the torque receiving portion 26 and the outer guide portion 31, as shown by hatching in FIG. Therefore, the number of processing steps can be reduced and the cost can be reduced as compared with the conventional case in which the disk path portion 35, the torque receiving portion 26, and the outer guide portion 31 are processed in separate steps.

Incidentally, in the conventional case, the disk path unit 3
It is conceivable to omit the processing of No. 5 to reduce the processing man-hours. However, if omitted in this way, the disk path portion 35 will have a casting surface, and therefore the disk path portion 35 and the slide pin hole formed by the processing. The thickness with 16 is not stable, so
There is a possibility that the slide pin hole 16 will be processed to make a hole through which the disc path portion 35 will be removed, and in order to prevent this, the slide pin hole 16 and the disc path portion 35 must be formed.
There is no choice but to increase the thickness between them and, in this case, there arises a problem of interference with the wheel or the disk 11. However, in the first embodiment, since the thickness A of the slide pin hole 16 and the disk path portion 35 are both formed by processing after reducing the processing man-hour as described above, it is necessary to set a large value. Can be secured without. Therefore, it is possible to supply a stable product while reducing the number of processing steps.

Further, in the case where the pad is supported by a carrier of a type having a disk-pass side surface with a casting surface extending so as to face both sides of the disk, the distance between the disk-pass side surface and the disk must be set large. Although there is a risk that the pad 13 may fall off when the friction material is worn due to this, as described above, the disc path portion 35 of the extending portion 24, the torque receiving portion 26, and the outer guide portion 31 are arranged on the disc axis line of the carrier 12. Since it is continuous over the entire length in the direction, the pad 13 can be completely prevented from falling off.

Here, the disk path portion 35 has a flat shape along the outer peripheral surface of the disk 11, but if it has a continuous shape in the disk axial direction, for example, it may be a curved surface along the outer circumference of the disk 11. It is also possible.

Next, a disc brake according to a second embodiment of the present invention will be described below with reference to FIG. 3 focusing on parts different from the first embodiment. In the disc brake of the second embodiment, a surface parallel to the surface of the inner protrusion 36 of the backing 13a of the pad 13 on the outer side in the disk radial direction of the outer surface in the disk radial direction is parallel to the end 27. A notch portion 43 is formed on the inner side in the radial direction of the disc so as to have a surface.

In accordance with this, the pad spring 28 is formed as a biasing plate portion (biasing portion) 44 which is bent so that the front end side is parallel to the intervening plate portion 29 from a predetermined intermediate position of the inner plate portion 37. The tip of the urging plate portion 44 has a cutout portion 43.
It has a curved shape so that its side is convex, and its tip end abuts against the notch 43 with a biasing force to bias the pad 13 inward in the disk radial direction. Since the urging plate portion 44 is provided on the inner side of the extending portion 24 in the disk radial direction as described above, the outer plate portion 33 has the outer projecting portion 3
2 and the outer guide portion 31 so as to project slightly outward and extend slightly outward in the disk radial direction (for example, to the inside of an arc centered on the disk center passing through the outermost end of the extending portion 24 in the disk radial direction). It is supposed to be released.

According to the disc brake of the second embodiment as described above, not only the effect described in the first embodiment can be obtained, but also the urging plate for urging the pad 13 inward in the disc radial direction. The portion 44 is provided on the inner side of the extending portion 24 in the disk radial direction and on the inner protruding portion 3 of the backing metal 13 a of the pad 13.
Since it is provided between the inner peripheral surface of the wheel 6 and the inner peripheral surface of the wheel 6, there is no fear of interference with the inner circumference of the wheel as in the case of being provided outside the extending portion 24 in the disk radial direction. Therefore, the degree of freedom in designing the biasing plate portion 34 is significantly improved. Also, pad 1
Since the pressing direction of 3 is on the inner side in the radial direction of the disk and coincides with the behavior of the pad 13 during braking, the effect of preventing abnormal noise such as squeal and judder is further enhanced.

[0025]

As described in detail above, the first aspect of the present invention
According to the described disc brake, both ends of the pad are guided to the mutually opposing sides of the both extending parts, and the outer protrusions provided at the both ends of the pad are guided to the outer side of the extending part in the disc radial direction. Further, the inner protrusions provided at both ends are guided inward in the disc radial direction of the extending portion and move in the disc axial direction. Therefore, even during vibration, etc., other than the disc axial direction. Movement is regulated. Therefore, it is possible to prevent abnormal noise such as pad rattle noise.

According to the disc brake of the second aspect of the present invention, the urging portion for urging the pad toward the inner side of the disc radial direction has the urging portion on the inner side of the extending portion in the disc radial direction and the inside of the pad. Since it is provided between the protrusion and the protrusion, there is no fear of interference with the inner circumference of the wheel as in the case where the protrusion is provided on the outer side in the disk radial direction. Therefore, the degree of freedom in designing the biasing portion is significantly improved.

According to the disc brake of the third aspect of the present invention, since the inner side of the extending portion in the disc radial direction is a continuous flat surface or curved surface along the outer periphery of the disc, the extending portions are opposed to each other. Also, it can be formed by one-time machining together with the portion for guiding the outer protruding portion on the disk radial direction side.

[Brief description of drawings]

FIG. 1 is a front view showing a disc brake according to a first embodiment of the present invention.

FIG. 2 is a partial front view of the disc brake according to the first embodiment of the present invention, showing the relationship between the caliper and the tool.

FIG. 3 is a partial front view showing a disc brake according to a second embodiment of the present invention.

FIG. 4 is a front view showing an example of a disc brake.

FIG. 5 is a plan view showing an example of a disc brake.

[Explanation of reference numerals] 11 disk 12 carrier 13 pad 24 extending portion 27 end portion 32 outer protruding portion 36 inner protruding portion 44 urging plate portion (urging portion)

Claims (3)

[Claims] 1. A carrier having a pair of extending portions arranged on one surface side of a disc and extending over the outer periphery of the disc along the disc axial direction, and both end portions on opposite sides of both extending portions. The outer protrusions are arranged so as to be guided, and protrude at both ends so as to extend along the outer side of the extending portion in the radial direction of the disc, and the outer protruding portion guides to the outer side of the extending portion in the radial direction of the disc. An inner protruding portion that is provided at both ends of the pad and that is guided along the inner side of the extending portion in the disk radial direction and is guided to the inner side of the extending portion in the disk radial direction. A disc brake characterized by being provided with. 2. A biasing portion for biasing the pad inward in the disk radial direction is provided between the inner side of the extending portion in the disk radial direction and the inward projection of the pad. The disc brake according to claim 1, wherein: 3. The disc brake according to claim 1, wherein an inner side of the extending portion in the disc radial direction is a continuous flat surface or a curved surface along the outer periphery of the disc.