JP4258913B2 - Disc brake - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a disc brake used in a vehicle or the like.
[0002]
[Prior art]
Conventionally, as a disc brake used in a vehicle such as an automobile, a pair of pads that are provided facing a carrier attached to a non-rotating portion of the vehicle and sandwiching the disc and supported by the carrier so as to be movable in the disc axial direction And a caliper provided across the disc and supported by the carrier so as to be movable in the disc axial direction, the caliper being disposed on one side of the disc axial direction with respect to the bridge portion and the bridge portion. It has a cylinder part and a claw part arranged on the other side in the disk axial direction with respect to the bridge part, and presses a pad on one side in the disk axial direction against the disk by the operation of a piston provided in the cylinder part. When the caliper moves with respect to the carrier due to the reaction force, the claw part moves the pad on the other side of the disk axis, and the other side pad and the claw. Through metallic shim plate provided between the configuration of the disc brake that presses, so-called pin slide type disk brakes are known to the disk.
[0003]
[Problems to be solved by the invention]
In this type of pin slide type disc brake, a metal shim plate is attached to the back metal of the pad, and before this mounting, grease is applied between the shim plate and the back metal of the pad, so that braking can be performed. At this time, the torque of the disk transmitted to the friction pad is configured not to be transmitted to the claw portion of the caliper that presses the friction pad.
[0004]
That is, the friction pad that receives the torque of the disk comes into contact with the carrier, and when the torque of the disk is supported by the carrier, it is attached to the pad back metal so as to be movable in the disk tangential direction. Since the shim plate coated with grease slides on the back metal of the pad, the torque of the disk is hardly transmitted to the claw portion of the caliper.
[0005]
Further, at least one side of the shim plate in the disc rotation direction, a stopper plate portion that is bent and extends toward the disc axial direction claw portion side in order to restrain the displacement of the shim plate in the disc rotation direction with respect to the caliper claw portion, It is formed so as to be able to come into contact with the opposing claw side surface or the inner side surface of the carrier.
[0006]
However, since the stopper plate portion plate surface of the shim plate extends in a direction substantially perpendicular to the disk tangential direction with respect to the plane parallel to the sliding surface of the disk, the friction plate with the shim plate attached to the carrier is provided. When the caliper is assembled to the carrier from the direction orthogonal to the disk axial direction and the disk tangential direction with the pad previously supported, the assembly direction of the caliper and the extending direction of the stopper plate portion plate surface of the shim plate Will be in the same direction.
[0007]
For this reason, when this assembly is performed, the caliper is assembled in a state where the caliper is relatively displaced relative to the normal position with respect to the carrier in the disk tangential direction, or the friction pad shim plate is relatively displaced in the disk tangential direction. When the friction pad is supported by the back pad of the friction pad, the caliper's claw and the edge of the shim plate's stopper plate first come into contact with the outer peripheral edge of the disc, and the edge is attached to the carrier. As a result, the shim plate is deformed or broken, and when the assembly is performed by the automatic assembly apparatus, there is a problem that the automatic assembly apparatus itself fails.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a pair of pads that are provided opposite to each other with a carrier attached to a non-rotating portion of a vehicle and sandwiched between the disks and supported by the carrier so as to be movable in the disk axial direction. And a caliper provided across the disc and supported by the carrier so as to be movable in the disc axial direction, and the caliper is disposed on one side of the disc axial direction with respect to the bridge portion and the bridge portion. And a claw portion disposed on the other side in the disc axial direction with respect to the bridge portion, and the pad on one side in the disc axial direction is pressed against the disc by the operation of a piston provided in the cylinder portion. By this movement of the caliper with respect to the carrier due to the reaction force at this time, the claw portion changes the pad on the other side in the disk axial direction to the other side pad. Via a metal shim plate mounted to be movable in the disc tangential direction relative interposed said pad and the claw portion between the tight part, the disc brake arrangement for pressing the disk, the shim plate Forming a stopper plate portion that bends and extends toward the claw portion in the disc axial direction in order to regulate the amount of movement of the shim plate relative to the pad in the disc tangential direction. The stopper plate portion is a disc on the surface of the stopper plate. the outer peripheral portion of the radial direction, than the inner circumferential portion of the stopper plate surface, Ri Na located outwardly from the pawl portion side with respect to the disc tangential direction, the claw portion when assembled the caliper to the carrier There the shim plate you characterized that you have adapted to move the disk tangential direction when in contact with the stopper plate.
[0009]
Further, according to the present invention, the outer peripheral portion of the stopper plate surface in the radial direction of the disk is at least outside of the inner peripheral side portion of the stopper plate surface with respect to the disc tangential direction by the allowable assembly error with respect to the disc tangential direction of the caliper to the carrier. It is located in the direction.
[0010]
Furthermore, the present invention is characterized in that the stopper plate surface is formed at an angle of 10 ° to 45 ° with respect to the attachment direction of the claw portion orthogonal to the disc axial direction and the disc tangential direction.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0012]
In the figure, reference numeral 1 denotes a disc brake according to the present embodiment, which is provided opposite to a carrier 10 attached to a non-rotating portion of a vehicle with a disc 2 interposed therebetween, and is supported by the carrier 10 so as to be movable in the disc axial direction. A pair of pads 30 and 30 (only one pad 30 appears in FIGS. 2 and 3) and a caliper 40 provided across the disk 2 and supported by the carrier 10 so as to be slidable in the disk axial direction. Generally composed.
[0013]
The carrier 10 is disposed on the inner side (inner side) of the disc 2 that rotates integrally with the wheels at a predetermined interval in the disc rotation direction, and a pair of inner leg portions 11 and 12 that extend from the inner peripheral side of the disc to the outer peripheral side. And a pair of outer members, which are arranged on the outer side (outer side) of the vehicle body with a certain interval in the direction of rotation of the disc with the disc 2 sandwiched in correspondence with each of the inner leg portions 11 and 12, and extending from the inner peripheral side of the disc to the outer peripheral side. Legs 13 and 14 are provided.
[0014]
The inner leg portion 11 and the outer leg portion 13 are integrally connected by the bridge portion 15 across the disk 2, and the inner leg portion 12 and the outer leg portion 14 are similarly bridged by the bridge portion 16 provided across the disc 2. Are connected integrally. Further, the inner leg portions 11, 12 facing each other inside the vehicle body of the disk 2 and the outer leg portions 13, 14 facing each other outside the vehicle body are integrally connected by connecting portions 17, 18, respectively. The connecting portion 17 on the inner side of the vehicle body is provided with an attachment hole (not shown) for fixing the carrier 10 to a non-rotating portion of the vehicle (not shown) through which a bolt or the like is inserted.
[0015]
The inner leg portions 11 and 12 and the outer leg portions 13 and 14 have pad engaging grooves 21, 22, 23, and 24 extending along the disk axial direction on the surfaces of the respective leg portions facing each other (FIG. 2, FIG. 2). 3, only the engaging groove 23 of one outer leg 13 is shown).
[0016]
On the other hand, each friction pad 30 is configured by sticking a friction material (not shown in FIGS. 2 and 3 because the friction pad 30 is viewed from the back metal 31 side) to the back metal 31, and the length of the back metal 31. Convex engaging portions 33 and 33 (only one engaging portion 33 is shown in FIGS. 2 and 3) are formed at both ends in the direction.
[0017]
One friction pad 30 has its engagement portions 33, 33 supported by the pad engagement grooves 21, 22 of the inner leg portions 11, 12, respectively, so as to be movable in the disk axis direction, and a vehicle inner pad 30i (not shown). The other friction pad 30 is configured such that its engaging portions 33 and 33 are supported by the pad engaging grooves 23 and 24 of the outer leg portions 13 and 14 so as to be movable in the disk axial direction, thereby forming a vehicle outer pad 30o. To do.
[0018]
Reference numerals 34 and 34 denote pad guide members between the pads 30i and 30o and the inner leg 11 and outer leg 13 on one side in the disk rotation direction, and between the pads 30i and 30o and the inner leg 12 and outer on the other side in the disk rotation direction. They are respectively interposed between the leg portions 14. The pad guide members 34, 34 facilitate the movement of the pads 30 i, 30 o in the disk axial direction with respect to the carrier 10, and the pads 30 i, 30 o are in the disk tangential direction with respect to the plane parallel to the sliding surface of the disk 2. The pads 30i and 30o are also prevented from rattling in the disk radial direction with respect to the carrier 10 by urging in a direction perpendicular to the carrier 10.
[0019]
The caliper 40 is formed by integrating the cylinder portion 41 disposed on the vehicle inner side of the disc 2, the claw portion 42 disposed on the vehicle outer side of the disc 2, and the cylinder portion 41 and the claw portion 42 across the outer periphery of the disc 2. And a disk path portion 43 connected to each other.
[0020]
The cylinder part 41 has a cylinder hole (not shown) opened on the disk 2 side, and a piston for pressing the pad 30i against the disk 2 based on the hydraulic pressure supplied from the outside in the hole. (Not shown).
[0021]
In addition, a pair of arm portions 44 and 44 project from the outer peripheral portion of the cylinder portion 41 at both side positions in the disc tangential direction. The pair of arm portions 44 and 44 are provided with pins 45 and 45 that are fixed with bolts or the like and extend in the disk axial direction.
[0022]
The pins 45 and 45 are respectively inserted into pin insertion holes (not shown) that are formed in correspondence with the carrier 10 and that open to the inside of the vehicle and extend in the disk axis direction so as to be able to advance and retreat. Is supported so as to be movable relative to the carrier 10 in the axial direction of the disk.
[0023]
On the other hand, the claw portion 42 extends from the disc path portion 43 inward in the radial direction of the disc to the back surface of the back metal 31 of the pad 30o, and moves the back metal 31 of the pad 30o by moving the caliper 40 relative to the carrier 10 in the axial direction of the disc. It can be pressed in the axial direction of the disk.
[0024]
Here, in order to prevent the claw portion 42 of the caliper 40 from coming into direct contact with the back metal 31 of the pad 30o, the claw portion 42 extending from the back metal 31 and the back surface of the back metal 31 of the pad 30o to the back metal 31 of the pad 30o. A metallic shim plate 50 is provided so as to be interposed therebetween.
[0025]
The shim plate 50 includes a flat plate portion 51 extending in the disc rotation direction so as to overlap the back surface of the pad 30 o, that is, the plate surface of the back plate 31, and edges of the flat plate portion 51 on the inner and outer peripheral sides in the disk radial direction. A locking claw 52 that extends and bends toward the friction pad 30o in the disk axial direction with respect to the plate surface of the flat plate portion 51 and restricts the shim plate 50 from coming off from the friction pad 30o in the disk radial direction, and the flat plate. From the edge of the disk 51 in the disk tangential direction on both sides, the shim plate 50 is bent toward the claw 42 in the disk axis direction with respect to the plate surface of the flat plate section 51, and the shim plate 50 rotates in the disk rotation direction with respect to the friction pad 30o. And stopper plate portions 53 and 53 (only one stopper plate portion 53 is shown in FIGS. 2 and 3) for restricting movement of a predetermined amount or more.
[0026]
Accordingly, the distance in the disk tangent direction between the stopper plate portions 53 of the shim plate 50 is longer than the width in the disk tangential direction of the corresponding claw portion 42 of the caliper 40 by the predetermined amount. At the same time, the stopper plate 53 itself has a height in the disc axial direction that can come into contact with the side surface 42s of the claw portion 42 from the disc tangential direction.
[0027]
Further, in the stopper plate portion 53, the outer peripheral side portion 53o of the stopper plate surface in the disk radial direction is located outward from the side surface of the claw portion 42 by δ with respect to the disc tangential direction from the inner peripheral side portion 53i. . The difference δ is located at least outward in the disc tangential direction by the amount of the assembly allowable error in the disc tangential direction of the caliper 40 with respect to the carrier 10. And it forms with the angle (theta) of 10 degrees-45 degrees with respect to the attachment direction of the nail | claw part orthogonal to a disk axial direction and a disk tangent direction (refer FIG. 4).
[0028]
Therefore, according to the disc brake of the present embodiment configured as described above, as shown in FIG. 2, with respect to the carrier 10 on which the pads 30i and 30o are mounted, the outer side in the radial direction of the disc 2, that is, FIG. In the case where the caliper 40 is positioned and assembled from the direction perpendicular to the axial direction and the tangential direction of the disk 2 indicated by the thick arrow, the position of the caliper 40 relative to the carrier 10 is set to the normal assembling position with respect to the tangential direction of the disk 2. Even if they are shifted to the left and right (note that FIG. 2 is shifted to the left when viewed from the claw portion 42 side with respect to the axis of the disc 2), the claw portion 42 is always a stopper plate of the shim plate 50. First, it comes into contact with the extended surface 53 a of the portion 53.
[0029]
As a result, a force F in the assembly direction is applied to the shim plate 50 and a force f in the tangential direction of the disk 2 acts, so that the shim plate 50 is against the back metal 31 of the pad 30o or the shim plate. The pad 30o itself to which the 50 is attached can also be moved integrally with the carrier 10 in the direction of the force f, that is, the position can be adjusted.
[0030]
Therefore, when the caliper 40 is positioned and assembled, the position of the caliper 40 with respect to the carrier 10 is shifted to the right and left with respect to the carrier 10 with respect to the tangential direction of the disk 2 and further, even if it is not possible to position mutually staggered adjust the caliper 40 and the assembling side carrier 10, can adjust the deviation of regular assembling position.
[0031]
As a result, the claw portion 42 of the caliper 40 and the disk outer peripheral side edge portion of the stopper plate portion 53 of the shim plate 50 first come into contact with each other, and the edge portion prevents the assembly of the caliper 40 to the carrier 10. It is possible to prevent the shim plate 50 from being deformed or broken, or even causing the automatic assembly apparatus itself to fail even when the assembly is performed by the automatic assembly apparatus.
[0032]
【The invention's effect】
According to the present invention, when the caliper is attached to the carrier, the claw portion is in contact with the stopper plate portion even if the mutual position is shifted to the right and left with respect to the normal assembly position with respect to the tangential direction of the disk. In addition, since the shim plate attached to the pad or the pad itself can move in the tangential direction of the disk, the shim plate is not damaged and the degree of freedom of the assembling position is increased, so that the assembling work is facilitated.
[Brief description of the drawings]
FIG. 1 is a plan view of a disc brake according to an embodiment of the present invention.
FIG. 2 is a view of the disc brake according to the embodiment of the present invention, viewed from the front, with a part omitted in a state when the caliper is assembled to the carrier.
FIG. 3 is a view of the disc brake according to the embodiment of the present invention, viewed from the front, with a part omitted, after the caliper is assembled to the carrier.
4 is an enlarged view of a portion surrounded by a frame B in FIG. 3. FIG.
[Explanation of symbols]
10 Carrier 30 Pad 40 Caliper 50 Shim plate 53 Stopper plate

Claims (3)

A carrier attached to a non-rotating part of the vehicle, a pair of pads that are provided opposite to each other with the disc interposed therebetween and supported by the carrier so as to be movable in the disc axis direction, and provided across the disc. A caliper supported so as to be movable in a direction, the caliper including a bridge portion straddling the disc, a cylinder portion arranged on one side of the disc axial direction with respect to the bridge portion, and a disc axis line with respect to the bridge portion A claw portion disposed on the other side in the direction, and presses the pad on one side in the disc axial direction against the disc by the operation of a piston provided in the cylinder portion, and a caliper for the carrier due to the reaction force at this time by the movement of, the pad of the claw disk axial direction the other side, interposed between the said other side pad the claw portion Via the serial pads and metal shim plate mounted to be movable in the disc tangential direction with respect to the claw portion, the disc brake arrangement for pressing the disk,
The shim plate is formed with a stopper plate portion that bends and extends toward the claw portion in the disc axial direction in order to regulate the amount of movement of the shim plate relative to the pad in the disc tangential direction. , the outer peripheral portion of the disk radial direction of the stopper plate surface than the inner peripheral portion of the stopper plate surface, Ri Na located outwardly from the pawl portion side with respect to the disc tangential direction, said caliper to said carrier disc brakes, wherein the shim plate when the claw portion is in contact with the stopper plate is characterized that you have adapted to move the disk tangential direction when assembled.   The outer peripheral portion of the stopper plate surface in the radial direction of the disk is positioned at least outwardly with respect to the disc tangential direction by the amount of assembly tolerance regarding the disc tangential direction of the caliper with respect to the carrier than the inner peripheral portion of the stopper plate surface. The disc brake according to claim 1, wherein   2. The disk according to claim 1, wherein the stopper plate surface is formed at an angle of 10 [deg.] To 45 [deg.] With respect to the mounting direction of the claw portion orthogonal to the disk axial direction and the disk tangential direction. brake.

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