JP2012215279A - Pad assembly for disc brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure capable of sufficiently mitigating brake squeal and partial wear during braking, by allowing an outer shim plate 4a to be always displaced in a circumferential direction and a radial direction with respect to an inner shim plate 3a, under a non-braking state, and facilitating stabilization of an attitude of a pad 1 during braking.SOLUTION: A pair of circumferential elastic pieces 15a, 15b and a pair of radial elastic pieces 19a, 19b are respectively provided on the side of the inner shim plate 3a. Furthermore, a pair of circumferential through-holes 23a, 23b, a pair of circumferential backing plate portions 24a, 24b, a pair of radial through-holes 25a, 25b and a pair of radial backing plate portions 26a, 26b are respectively provided on the side of the outer shim plate 4a. The respective elastic pieces 15a, 15b, 19a, 19b are elastically engaged with the respective backing plate portions 24a, 24b, 26a, 26b, and thereby the outer shim plate 4a is positioned in a neutral state with respect to the inner shim plate 3a, under the non-braking state.

Description

  The present invention is incorporated in a disc brake used for braking a vehicle to suppress brake squeal that occurs when the pad vibrates during braking, or to suppress uneven wear that causes uneven wear on the pad lining. The present invention relates to an improvement of a disc brake pad assembly.

  A disc brake used for braking an automobile is configured such that a pair of pads are arranged with a rotor rotating together with wheels, and these pads are pressed against both axial sides of the rotor during braking. There are two basic structures of such a disc brake, a floating type and an opposed piston type. Among these, the floating type has a caliper with a piston built in the inner side mounted on a support that supports a pair of pads so as to be capable of axial displacement, and is capable of axial displacement. During braking, the piston presses the inner pad against the inner side of the rotor, and displaces the caliper toward the inner side as a reaction. The outer pad is pressed against the outer side surface of the rotor by a caliper claw provided at the outer side end of the caliper. In the opposed piston type, a plurality of pistons are arranged on both sides of the rotor in the axial direction of a caliper that supports a pair of pads so as to be axially displaceable. At the time of braking, the two pads are pressed against both axial sides of the rotor by the pistons. In any case, these two pads are formed by attaching a lining to the front surface of a pressure plate having sufficient rigidity. During braking, the back surface of the pressure plate is pressed by the piston or the caliper claw portion, and the front surface of the lining and both axial side surfaces of the rotor are rubbed. In the present specification and claims, the axial direction, circumferential direction, and radial direction are the axial direction and diameter of the rotor when the disc brake pad assembly is assembled to the disc brake, unless otherwise specified. Direction, circumferential direction.

  Regardless of the structure of the disc brake, any pair of pads is used to strongly hold the rotor from both sides in the axial direction during braking, and the lining that forms these pads and the contact portion between both side surfaces in the axial direction of the rotor. Braking is performed by the applied frictional force. At the time of such braking, the part where the frictional force acts and the part where the piston or the caliper claw part presses both the pads are shifted by the thickness of both the pads in the axial direction. Thus, the postures of both pads are likely to be unstable. When the postures of both the pads become unstable, both the pads vibrate and generate noise called squeal, and the degree of uneven wear of the lining tends to be remarkable.

  In order to alleviate such squeal and uneven wear, conventionally, the back surface of the pressure plate constituting the pad and the front end surface of the piston or the inner surface of the caliper claw portion which is a pressing surface for pressing the back surface. It is common practice to sandwich shim plates between them. Although such a shim plate may have a single plate configuration, the effect of suppressing the squeal and uneven wear is improved by adopting a two-sheet structure in which an inner shim plate and an outer shim plate are overlapped. It is known to be allowed to. Conventionally, for example, those disclosed in Patent Documents 1 to 7 are known as a disc brake pad assembly having such a two-sheet shim plate. 50 to 51 show a conventional structure described in Patent Document 5 among them.

  This conventional structure is formed by mounting a combination shim plate 5 comprising an inner shim plate 3 and an outer shim plate 4 on the back surface of a pressure plate 2 constituting the pad 1. The pad 1 is fixedly attached to the front surface of the pressure plate 2 (the surface facing the side surface of the rotor when assembled to the disc brake) with a large coupling force so that the lining 6 does not move due to the brake torque applied during braking. It consists of The inner shim plate 3 is made of a metal plate such as a stainless steel plate or a stainless steel plate coated with rubber, and includes a flat plate-like inner main body portion 7 and a plurality of inner locking pieces 8a, 8b, and 8c. The inner body portion 7 is formed with a plurality of through-holes 9 and 9 for holding the grease inside. Of the inner and outer peripheral portions of the pressure plate 2 in the radial direction, a locking recess 10 is provided at the circumferential central portion of the outer peripheral side peripheral portion, and a pair of step portions 11 are provided at both ends of the inner peripheral side peripheral portion in the circumferential direction. Are formed respectively. Of the inner locking pieces 8a, 8b, and 8c, the inner shim plate 3 has the inner locking pieces 8a on the outer diameter side as the locking recesses 10 and the inner locking pieces 8b and 8c on the inner diameter side as described above. The pressure plate 2 is clamped from both sides in the radial direction by the inner locking pieces 8a, 8b, 8c while being engaged with both stepped portions 11, respectively. In this state, the inner shim plate 3 is mounted on the back side of the pressure plate 2 in a state where displacement in the circumferential direction and the radial direction is restricted (substantially blocked except for a slight assembling gap). .

  The outer shim plate 4 is made of a metal plate such as a stainless steel plate, and includes a flat plate-like outer body portion 12 and a plurality of outer locking pieces 13a, 13b, and 13c. Such an outer shim plate 4 overlaps the outer main body portion 12 with the inner main body portion 7 while superposing the outer locking pieces 13a, 13b, 13c on the inner locking pieces 8a, 8b, 8c. Match. In this state, the outer shim plate 4 is assembled to the inner shim plate 3 so as to be able to be displaced in the circumferential direction. For this purpose, the width dimension in the circumferential direction of the outer locking piece 13a is made smaller than the width dimension in the circumferential direction of the locking recess 10 and the inner locking piece 8a, so that the outer locking pieces 13b, 13c. The interval between the circumferential outer edges, which are opposite side edges, is made smaller than the interval between the two stepped portions 11.

  In the case of the conventional structure having the above-described configuration, both circumferential edges of the outer locking piece 13a are separated from both circumferential inner surfaces of the locking recess 10, and both the outer locking pieces 13b and 13c are arranged. The outer shim plate 4 can be displaced in the circumferential direction with respect to the inner shim plate 3 if the outer edge of the outer shim plate is separated from the stepped portions 11. If braking is performed in this state, the posture of the pad 1 can be stabilized and the squeal and uneven wear can be alleviated. However, the outer shim plate 4 may be displaced in the circumferential direction due to vibration during traveling. Then, based on this displacement, the circumferential edge of the outer locking piece 13a abuts on the inner circumferential surface of the locking recess 10, or one of the outer locking pieces 13b and 13c. There is a possibility that the outer edge of the outer locking piece 13b (13c) remains in contact with any stepped portion 11. Brake is performed from this state, the circumferential edge of the outer locking piece 13a is pressed against the inner circumferential surface of the locking recess 10, or the outer edge of any one of the outer locking pieces 13b (13c) is When pressed against any one of the step portions 11, the posture of the pad 1 is not always stable, and there is a possibility that the squealing and uneven wear cannot be alleviated sufficiently. In the case of the conventional structure described in patent documents other than the above-mentioned patent document 5, substantially the same problem occurs.

JP 2000-145839 A JP 2001-41268 A JP 2002-364585 A JP 2005-83478 A JP 2006-200560 A Japanese Utility Model Publication No. 3-46262 No. 6-11377

  In view of the circumstances as described above, the present invention provides a pad for braking at least in the non-braking state by making the outer shim plate always displaceable in the circumferential direction with respect to the inner shim plate. The invention has been invented to realize a structure that makes it easy to stabilize the posture and can sufficiently relieve squeal and uneven wear during braking.

The pad assembly for a disc brake according to the present invention includes a pad, an inner shim plate, and an outer shim plate.
Of these, the pad is formed by attaching and fixing a lining to the front surface of the pressure plate, and is disposed at a portion facing the axial side surface of the rotor.
In addition, the inner shim plate is in a state in which the displacement in the circumferential direction and the radial direction is limited (substantially blocked except for a clearance for securing assembly) on the back surface of the pressure plate constituting the pad. It is attached and has a flat inner body part.
The outer shim plate is superimposed on the inner shim plate and has a flat outer body portion.

In particular, in the disc brake pad assembly of the present invention, at least one of the inner and outer shim plates is made of an elastic metal plate. And each is provided with a pair of an inner bending raising structure part and an outer bending raising structure part.
Of these, the inner bent and raised structure is provided in two bent positions in the inner body portion of the inner shim plate in the circumferential direction so as to be bent in the thickness direction of the inner body portion. .
In addition, the outer bent and raised structure portion is formed in the outer main body portion of the outer shim plate so as to be aligned with both inner bent and raised structure portions with respect to the thickness direction of the outer body portion. It is provided in a bent state in the same direction as the portion.
The inner body portion is overlapped with the back surface of the pressure plate, and the outer body portion is overlapped with the outer surface of the inner body portion. At least one of the inner bent raised structure portion and the outer bent raised structure portion by elastically contacting the portion with at least a pressing force in the circumferential direction. The outer shim plate can be displaced in the circumferential direction with respect to the inner shim plate based on the elastic deformation of the inner shim plate.

When carrying out the present invention as described above, for example, as in the invention described in claim 2, each includes a pair of circumferential elastic pieces, circumferential through holes, and circumferential receiving plates. .
Of these, each of the circumferential elastic pieces, each corresponding to the both inner bent and raised structure portions, is separated from each other in the circumferential direction in the inner main body portion of the inner shim plate from the pressure plate. And bent in the state of projecting toward the opposite side, and the respective intermediate portions in different directions with respect to the circumferential direction (for example, toward the center in the circumferential direction in the direction in which the tip portions approach each other, or conversely, the tip The parts are folded back in a U shape (towards both ends in the circumferential direction). And a circumferential substrate portion continuous to the inner body portion of the inner shim plate, a circumferential curved portion continuing from the distal edge of the circumferential substrate portion, and a distal edge of the circumferential curved portion, And a circumferential elastic pressing plate portion having a free end that is not continuous with any portion.
The circumferential through holes are formed in a portion of the outer body portion of the outer shim plate that is aligned with the circumferential elastic pieces, and each of the circumferential through holes can be inserted through the circumferential circumferential pieces. Have a size.
Further, each of the circumferential direction receiving plate portions, each corresponding to the outer bending raising portion, of the circumferential direction through holes, from the opposite edges of the circumferential direction to the opposite side of the pressure plate. It has been bent and raised in a projecting state.

The pad, the inner shim plate, and the outer shim plate, each of which has the configuration as described above, are formed by superimposing the inner body portion of the inner shim plate on the back surface of the pressure plate, and further, the inner body portion. The two circumferential elastic pieces are elastically brought into contact with the two circumferential receiving plates in a state where the outer main body portion of the outer shim plate is superposed on the outer surface side of the outer circumferential shim.
The outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate based on the elastic deformation of the two circumferential elastic pieces.

When implementing the disc brake pad assembly of the invention described in claim 2 as described above, it is preferable that, as in the invention described in claim 3, at least the circumference of the circumferential elastic pieces. The width in the radial direction of the portion located on the inner side of the circumferential through hole in the directional substrate portion is at least larger than the width in the same direction of the circumferential curved portion.
Alternatively, as in the invention described in claim 4, the circumferential elastic pressing plate part constituting the circumferential elastic piece is inclined in a direction in which the angle formed by the inner body portion of the inner shim plate is an acute angle. The both circumferential direction receiving plate portions are inclined in a direction in which an angle formed with the outer main body portion of the outer shim plate is an acute angle. Then, the inner shim plate and the outer shim plate are prevented from being separated based on the engagement between the circumferential elastic pressing plate portion and the circumferential receiving plate portion.

Further, as in the invention described in claim 5, each pair includes a pair of radial elastic pieces, a radial through hole, and a radial receiving plate portion.
Each of the pair of radial elastic pieces is bent and raised in a state of projecting toward the opposite side of the pressure plate from two positions separated from each other with respect to the radial direction in the inner main body portion of the inner shim plate. In the direction different from each other with respect to the radial direction (for example, toward the radial center in the direction in which the tip portions approach each other, or conversely, toward the both ends in the radial direction in the direction in which the tip portions move away from each other) It is folded in a U shape. And a radial substrate portion continuous with the inner body portion of the inner shim plate, a radial curved portion continuous from the distal edge of the radial substrate portion, and a distal edge of the radial curved portion, And a radial elastic pressing plate portion having a free end that is not continuous with any portion.
The radial through holes are formed in portions of the outer main body portion of the outer shim plate that are aligned with the radial elastic pressing pieces. Have the possible size.
Further, the both radial direction receiving plate portions are bent and raised in a state of projecting toward the opposite side of the pressure plate from the opposite edges of the circumferential direction in the circumferential through holes. is there.
Then, in a state where the inner body part is overlaid on the back surface of the pressure plate, and further, the outer body part is overlaid on the outer surface side of the inner body part, the both radial elastic pieces are placed in the both radial direction receiving plate part. It is made to contact elastically.
Further, the outer shim plate can be displaced in the radial direction with respect to the inner shim plate based on the elastic deformation of the both radial elastic pieces.

Preferably, when carrying out the invention described in claim 5 as described above, as in the invention described in claim 6, at least of the radial substrate portions of the radial elastic pieces, the The width in the circumferential direction of the portion located inside the radial through hole is set to be larger than at least the width in the same direction of the radial bending portion.
Alternatively, as in the invention described in claim 7, the radial elastic pressing plate portion constituting the both radial elastic pieces is inclined in a direction in which an angle formed by the inner body portion of the inner shim plate is an acute angle. At the same time, the both radial direction receiving plate portions are inclined in a direction in which the angle formed by the outer main body portion of the outer shim plate is an acute angle. Then, the inner shim plate and the outer shim plate are prevented from being separated based on the engagement between the both radial elastic pressing plate portion and the both radial direction receiving plate portion.

Further, when carrying out the present invention described above or the invention described in claims 2 to 4, for example, as in the invention described in claim 8, a pair of each of the radial elastic structure portion and the radial receiving member is provided. A plate portion.
Of these, each of the radial elastic structural portions is bent toward the opposite side of the pressure plate from two positions spaced apart in the circumferential direction at a part of the inner peripheral edge of the outer body portion of the outer shim plate, respectively. A pair of elastic pieces are provided in which the tip portions of the two are superposed on each other in the radial direction.
Further, the bi-directional receiving plate portion is bent toward a side opposite to the pressure plate from a portion of the inner body portion of the inner shim plate that is aligned with a portion between the tip portions of the elastic pieces. It is a thing.
Then, in a state where the inner main body portion is overlaid on the back surface of the pressure plate, and the outer main body portion is overlaid on the outer surface side of the inner main body portion, the both radial direction receiving plate portions are placed between the elastic pieces. The outer shim plate can be displaced in the radial direction with respect to the inner shim plate on the basis of elastic deformation of each elastic piece by being sandwiched elastically.

When carrying out the present invention or the above-described invention according to claim 8, for example, as in the invention according to claim 9, a pair of a circumferential elastic structure portion, a circumferential receiving plate portion, Is provided.
Each of the circumferential elastic structures corresponding to the both inner bent raised structures is bent from both circumferential edges of the outer body portion of the outer shim plate toward the opposite side of the pressure plate, A pair of elastic pieces in which the respective tip portions are overlapped with each other in the circumferential direction are provided.
Further, the circumferential receiving plate portion is bent toward a side opposite to the pressure plate from a portion of the inner body portion of the inner shim plate that is aligned with a portion between the tip portions of the elastic pieces. It is a thing.
Then, in a state where the inner body portion is overlaid on the back surface of the pressure plate, and the outer body portion is overlaid on the outer surface side of the inner body portion, the circumferential direction receiving plate portion is placed between the elastic pieces. The outer shim plate can be displaced in the circumferential direction with respect to the inner shim plate on the basis of elastic deformation of each elastic piece by being sandwiched elastically.

When the present invention is carried out, for example, as in the invention described in claim 10, a pair of inclined elastic pieces and an inclined receiving plate portion are provided.
The two inclined elastic pieces include a base portion of an extending portion that extends from an end edge of a circumferentially opposite end portion of the main body portion of one of the inner shim plate and the outer shim plate. Folded toward the opposite side of the plate (for example, formed by bending the base of the extension part toward the opposite side of the pressure plate and folding the middle part into a U-shape, or an L-shaped extension part. Is bent toward the opposite side of the pressure plate). Then, the respective portions closer to the distal end are inclined with respect to the radial direction and the circumferential direction, and the inclined elastic pressing plate portion is a free end where each distal end edge is not continuous with any portion.
In addition, the both inclined receiving plate portions are bent toward the opposite side of the pressure plate from the edge of the inner shim plate and the outer shim plate on the other side of the body portion of the other shim plate in the circumferential direction. It consists of
Further, in the state where the inner body portion of the inner shim plate is overlaid on the back surface of the pressure plate, and the outer body portion of the outer shim plate is overlaid on the outer surface side of the inner body portion, the both inclined elastic pieces are The both inclined receiving plate portions are elastically pressed in a direction inclined with respect to the circumferential direction and the radial direction by the inclined elastic pressing plate portion that is configured. Then, the outer shim plate can be displaced in the circumferential direction and the radial direction with respect to the inner shim plate based on the elastic deformation of the both inclined elastic pieces.

  When carrying out the invention described in claim 10 as described above, preferably, as in the invention described in claim 11, at the portions near both ends in the circumferential direction of the main body portions of the inner and outer shim plates, A pair of support portions for supporting the elastic force of the both inclined elastic pieces while allowing relative displacement in the circumferential direction of both the shim plates at a portion different from the both inclined elastic pieces and the both inclined receiving plate portions. Is provided.

When carrying out the invention described in claim 11 as described above, for example, as in the invention described in claim 12, the two support portions are each paired with a second inclined elastic piece and a second inclined It shall be provided with the receiving plate part.
Of these, the second inclined elastic pieces are formed by extending the base portion of the extending portion extending from the edge of the circumferentially opposite ends of the main body portion of one of the inner shim plate and the outer shim plate. Folded toward the opposite side of the pressure plate (for example, formed by folding the base of the extension portion toward the opposite side of the pressure plate and folding the middle portion into a U-shape, or an L-shaped extension. The base portion of the protruding portion is bent toward the opposite side of the pressure plate). Then, the second inclined elasticity, which is a free end where each tip edge portion is inclined with respect to the radial direction and the circumferential direction in a direction different from the both inclined elastic pieces, and each tip edge is not continuous with any portion. Let it be a pressing plate.
In addition, the second inclined receiving plate portions are arranged on the opposite side of the pressure plate from the end edge of the body portion of the other shim plate of the inner shim plate and the outer shim plate at both ends in the circumferential direction. It shall be bent toward
In addition, the second inclined elastic member is formed with the inner body portion of the inner shim plate overlapped with the back surface of the pressure plate and the outer body portion of the outer shim plate overlapped with the outer surface side of the inner body portion. The tip of the second inclined elastic pressing plate portion constituting the piece causes the second inclined receiving plate portions to be different from each other in the circumferential direction and the radial direction. It presses elastically in the inclined direction. The outer shim plate can be displaced in the circumferential direction and the radial direction with respect to the inner shim plate based on the elastic deformation of the second inclined elastic pieces.

Alternatively, when carrying out the invention described in claim 11, as in the invention described in claim 13, each of the support parts is provided with a pair of radial elastic pieces and a radial receiving plate part. Shall be.
Of these, the radially elastic piece is a base portion of an extending portion extending from a radial end edge of a circumferentially opposite end portion of the main body portion of one of the inner shim plate and the outer shim plate. (E.g., formed by folding the base portion of the extension portion toward the opposite side of the pressure plate and folding the intermediate portion back into a U shape, or The base part of the extension part is formed by being bent toward the side opposite to the pressure plate). Then, each tip end portion is a radial elastic pressing plate portion that is a free end where each tip edge is not continuous with any portion.
Further, the radial direction receiving plate portion is bent toward the opposite side of the pressure plate from the edge of the body portion of the other shim plate of the inner shim plate and the outer shim plate at both ends in the circumferential direction. Shall be.
Further, in the state where the inner main body portion of the inner shim plate is overlaid on the back surface of the pressure plate, and the outer main body portion of the outer shim plate is overlaid on the outer surface side of the inner main body portion, The both radial receiving plate portions are elastically pressed in the radial direction by the distal end portions of the radial elastic pressing plate portions constituting the. The outer shim plate is displaceable in the radial direction with respect to the inner shim plate based on the elastic deformation of the both radial elastic pieces.

  According to the disc brake pad assembly of the present invention configured as described above, the disc brake pad assembly is moved in the non-braking state, that is, by the pressing surface which is the inner end surface of the piston or the caliper claw. In a state where the outer shim plate is not pressed against the inner shim plate, the outer shim plate can always be displaced in the circumferential direction relative to the inner shim plate. That is, in the non-braking state, the surface pressure of the contact portion between the inner and outer side surfaces of the outer shim plate, the outer surface of the inner shim plate, and the pressing surface is reduced or lost. As a result, the elastic deformation of at least one of the pair of inner bent and raised structures and the outer bent structure is caused by elastic deformation (for example, a pair of circumferential directions in the case of the invention described in claim 2). According to the elastic force of the elastic piece, the outer shim plate moves (returns) to the neutral position with respect to the inner shim plate (in the case of the invention described in claim 9 by the elastic force of each elastic piece).

  When braking is performed from this state and the inner shim plate tends to be displaced in the circumferential direction together with the pressure plate of the pad due to the braking torque based on the friction between the pad lining and the side surface of the rotor, the at least one bending raising structure (In the case of the invention described in claim 2, the two elastic pieces in the circumferential direction, in the case of the invention described in claim 9, each of the elastic pieces is inclined in the case of the invention described in claim 10) The elastic pressing piece is elastically deformed (one of these circumferential elastic pieces, each of these elastic pieces, each of these inclined elastic pressing pieces is extended in the displacement direction rear side and the other in the displacement direction front side is compressed) The outer shim plate is displaced from the neutral position in any direction with respect to the circumferential direction with respect to the inner shim plate. As a result, the posture of the pad at the time of braking can always be stabilized, and the squeal and uneven wear at the time of braking can be alleviated sufficiently.

According to the invention described in claim 3, the elasticity of the pair of circumferential elastic pieces is kept low, the ease of displacement of the outer shim plate with respect to the inner shim plate is ensured, and both the circumferential directions are provided. Even when the elastic piece is broken, the outer shim plate can be reliably prevented from falling off in the circumferential direction.
Further, according to the invention described in claim 4, the outer shim plate and the inner shim plate can be prevented from being inadvertently separated, and a combination shim plate formed by combining both the shim plates, The handleability of the disc brake pad assembly in which the combination shim plate and the pad are combined can be improved.

According to the fifth aspect of the present invention, the positional relationship in the radial direction between the outer shim plate and the inner shim plate can be properly regulated. Specifically, the positional relationship in the radial direction of the outer shim plate with respect to the inner shim plate in the non-braking state can be set to the neutral position. The outer shim plate can be surely displaced in the radial direction with respect to the inner shim plate during braking, and the posture of the pad during braking can be made more stable.
Furthermore, according to the invention described in claims 6 and 7, the same effect as that of the invention described in claims 3 and 4 can be obtained with respect to the positioning structure in the radial direction.

  Further, according to the eighth and tenth aspects of the present invention, the pair of radially elastic structures can be installed in a portion that does not interfere with the piston, caliper, and support, and of course, the piston can be removed from the opening of the piston. It is easy to install on the part. Therefore, even when the present invention is implemented with a floating type disc brake, when replacing the pad, the caliper is displaced relative to the support while the support is fixed to the vehicle body (one guide pin is removed and the other is removed). The pad can be replaced by swinging and displacing the caliper around the guide pin.

The perspective view which looked at the back side of the pad from the radial direction outer side which shows the 1st example of embodiment of this invention. The a section enlarged view of FIG. The b section enlarged view. The perspective view seen from the same direction as FIG. 1 in the state before combining a pad, an inner shim board, and an outer shim board. X arrow line view of FIG. The c section enlarged view of FIG. The d section enlarged view. Ee sectional drawing. Ff sectional drawing. The g section enlarged view of FIG. 8 which abbreviate | omits and shows a part. The perspective view which looked at the pad side from the inner side in the radial direction of the inner shim plate and the outer shim plate that were combined in advance prior to mounting on the pad. The perspective view similarly seen from the radial direction outer side at the non-pad side. The figure similar to FIG. 4 which shows the 2nd example of embodiment of this invention. FIG. 13 is an enlarged view (A) of the h portion in FIG. 13 and an enlarged view of the i portion (B). The orthographic view seen from the back side in the state which combined the pad, the inner shim board, and the outer shim board. The j section enlarged view of FIG. FIG. 16 is an orthographic view seen from above in FIG. 15. The k section enlarged view of FIG. An orthographic view of the state where the disc brake is assembled as viewed from the outer side. Similarly, the orthographic view seen from the right side of FIG. Similarly, an orthographic view seen from the inner side. The figure similar to FIG. 1 which shows the 3rd example of embodiment of this invention. The m section enlarged view of FIG. The n-part enlarged view. The perspective view seen from the same direction as FIG. 22 in the state before combining a pad, an inner shim board, and an outer shim board. The orthographic view seen from the back side in the state which combined the pad, the inner shim board, and the outer shim board. Similarly, an orthographic view seen from above in FIG. Similarly, the orthographic view seen from the left of FIG. The figure similar to FIG. 1 which shows the 4th example of embodiment of this invention. The o section enlarged view of FIG. The p section enlarged view. The perspective view seen from the same direction as FIG. 29 in the state before combining a pad, an inner shim board, and an outer shim board. The orthographic view seen from the back side in the state which combined the pad, the inner shim board, and the outer shim board. FIG. 34 is an orthographic view as seen from above in FIG. The orthographic view seen from the left of FIG. 33. The figure similar to FIG. 1 which shows the 5th example of embodiment of this invention. The s section enlarged view of FIG. The t section enlarged view. The perspective view seen from the same direction as FIG. 36 in the state before combining a pad, an inner shim board, and an outer shim board. The orthographic view seen from the back side in the state which combined the pad, the inner shim board, and the outer shim board. Similarly, the orthographic view seen from the upper part of FIG. Similarly, the orthographic view seen from the left side of FIG. The figure similar to FIG. 1 which shows the 6th example of embodiment of this invention. The q section enlarged view of FIG. The r section enlarged view. The perspective view seen from the same direction as FIG. 43 in the state before combining a pad, an inner shim board, and an outer shim board. The orthographic view seen from the back side in the state which combined the pad, the inner shim board, and the outer shim board. Similarly, the orthographic view seen from above in FIG. Similarly, the orthographic view seen from the left side of FIG. The figure similar to FIG. 1 which shows an example of a conventional structure. The perspective view shown in the state before the combination similarly.

[First example of embodiment]
FIGS. 1-12 has shown the 1st example of embodiment of this invention corresponding to Claims 1-7. The disc brake pad assembly 14 of this example includes a pad 1, an inner shim plate 3a, and an outer shim plate 4a. Of these, the pad 1 is the same as that incorporated in the conventional structure shown in FIGS. 50 to 51 described above, and has a lining 6 attached and fixed to the front surface of the pressure plate 2. And the latching recessed part 10 is formed in the circumferential direction center part of the outer peripheral side peripheral part of this pressure plate 2, and a pair of level | step-difference parts 11 and 11 are formed in the circumferential direction both ends part of the internal peripheral side peripheral part, respectively. The inner shim plate 3a and the outer shim plate 4a are separately mounted on the pressure plate 2, and are overlapped in advance to form a combined shim plate 5a as shown in FIGS. In some cases. Even if the shim plates 3a and 4a are assembled back and forth with respect to the pressure plate 2, or the combination shim plate 5a is combined in advance, the structure of the completed disc brake pad assembly 14 and The action is exactly the same. Accordingly, the order in which the constituent members 1, 3a, 4a are combined does not affect the technical scope of the present invention. Hereinafter, each component will be described.

  First, the inner shim plate 3a is attached to the back surface of the pressure plate 1 in a state where the displacement in the circumferential direction and the radial direction is limited. The inner shim plate 3a has a flat inner body portion 7 and a plurality of inner engagement members. Stop pieces 8a, 8b, 8c and a plurality of through holes 9, 9 are provided. Such an inner shim plate 3a has an inner locking piece 8a on the outer diameter side of the inner locking pieces 8a, 8b, 8c in the locking recess 10, and an inner locking piece 8b on the inner diameter side, 8c is mounted on the back surface side of the pressure plate 2 in a state in which the displacement in the circumferential direction and the radial direction is restricted while being engaged with both the step portions 11 and 11, respectively.

  In addition, a pair of circumferential elastic pieces 15 a and 15 b are provided at two positions on both ends in the circumferential direction of the inner body portion 7. These two circumferential elastic pieces 15a and 15b are formed by bending a part of a metal plate, such as a stainless steel plate, constituting the inner shim plate 3a so as to protrude toward the opposite side of the pressure plate 2, respectively. The intermediate portion is folded in a U shape in different directions with respect to the circumferential direction. In the case of this example, at both ends of the inner body portion 7, the band-like portions existing inside the U-shaped cut formed in the state where the opposite sides (circumferential outer edge side) are opened are bent and raised. Both the circumferential elastic pieces 15a and 15b are used. These two circumferential elastic pieces 15a and 15b are either a pressing surface for pressing the pad 1 against the side surface of the rotor in an assembled state to the disc brake, and are either on the front end surface of the piston or the inner side surface of the caliper claw portion. It is installed in a part that does not interfere with the surface.

  Each of the circumferential elastic pieces 15a and 15b includes a circumferential substrate portion 16, a circumferential bending portion 17, and a circumferential elastic pressing plate portion 18. Of these, the circumferential substrate portion 16 is formed in a state of being continuous with the inner body portion 7 in a direction perpendicular to the inner body portion 7. The circumferentially curved portion 17 is provided in a state of being continuous from the leading edge of the circumferential substrate portion 16, and the intermediate portion of the belt-like portion is folded back over 180 degrees (for example, about 182 to 190 degrees). It is constituted by. Further, the circumferential elastic pressing plate portion 18 is a flat plate provided in a state of being continuous from the distal end edge of the circumferential curved portion 17, and the distal end edge is a free end that is not continuous with any portion. Accordingly, the circumferential elastic pressing plate portion 18 is inclined in a direction toward the circumferential substrate portion 16 toward the tip edge. An angle α (see FIG. 10) formed by the circumferential elastic pressing plate portion 18 with respect to the direction perpendicular to the inner body portion 7 is about 2 to 10 degrees. Further, the circumferential elastic pieces 15a and 15b have a width at the middle portion smaller than widths at both ends. That is, the width W (see FIG. 7) of the base half portion of the circumferential substrate portion 16 and the tip half portion of the circumferential elastic pressing plate portion 18 is set as the front half portion of the circumferential substrate portion 16 and the circumferential elasticity. The base half of the pressing plate 18 and the width w of the circumferential bending portion 17 are larger (W> w).

  In addition, radial elastic pieces 19a and 19b are provided at two positions spaced apart from each other in the radial direction at the intermediate portion in the circumferential direction of the inner main body portion 7, respectively. These radial elastic pieces 19a and 19b have the same basic configuration (shape and dimensions) as the above-described circumferential elastic pieces 15a and 15b except that the installation position and the installation direction are different. That is, the two radial elastic pieces 19a and 19b are formed by separating the three circumferential elastic pieces 15a and 15b from the three sides surrounded by H-shaped cuts formed in the central portion of the inner body portion 7 in the circumferential direction. And bent up to the opposite side of the pressure plate 2. Such both radial elastic pieces 19a, 19b are respectively a radial substrate part 20 continuous to the inner body part 7, a radial curved part 21 continuous from the leading edge of the radial substrate part 20, and A radial elastic pressing plate portion 22 that is continuous from the distal end edge of the radial bending portion 21 and has the distal end edge as a free end not continuous with any portion is provided. The inclination angle of each part is the same as that of the circumferential elastic pieces 15a and 15b. Further, the two radial elastic pieces 19a and 19b are also installed in portions that do not interfere with the pressing surface.

  On the other hand, the outer shim plate 4a is superposed on the inner shim plate 3a so as to be slightly displaceable in the circumferential direction and the radial direction, respectively, and has a flat plate-like outer body portion 12. Then, a pair of circumferential through holes 23a, 23b, circumferential receiving plates 24a, 24b, radial through holes 25a, 25b, and radial receiving plates 26a, 26b are formed on the outer body portion 12 respectively. With.

  Of these, the circumferential through holes 23a and 23b are formed in portions of the flat outer body portion 12 constituting the outer shim plate 4a that are aligned with the circumferential elastic pieces 15a and 15b. Thus, each has a size capable of inserting the circumferential elastic pieces 15a and 15b. Further, the circumferential receiving plates 24a and 24b protrude from the edge of the central side in the circumferential direction of the circumferential through holes 23a and 23b toward the opposite side of the pressure plate 2, respectively. , 90 degrees (for example, 100 to 110 degrees) is bent. Therefore, the angle β (see FIG. 10) formed by the circumferential receiving plates 24a and 24b and the outer body portion 12 is about 70 to 80 degrees. In the case of this example, the both circumferential direction receiving plate portions are formed by bending the inner side of the U-shaped cut formed in a state where the opposite sides are opened at two positions on both ends in the circumferential direction of the outer body portion 12. 24a and 24b, and the portions opened by bending both the circumferential receiving plates 24a and 24b are the circumferential circumferential holes 23a and 23b.

  The radial through holes 25a and 25b are formed in portions of the outer body portion 12 that are aligned with the radial elastic pieces 19a and 19b, and each of the radial elastic pieces 19a. , 19b can be inserted. In addition, the radial direction receiving plate portions 26a and 26b are located on the opposite side of the pressure plate 2 from the central edge of the outer body portion 12 in the radial direction of the radial direction through holes 25a and 25b. In the state of projecting, it is bent 90 degrees. Both the radial direction through holes 25a and 25b and the both radial direction receiving plate portions 26a and 26b have the same basic configuration (shape and size) except for the installation position and the installation direction. The same as 23a and 23b and the two circumferential receiving plates 24a and 24b.

  The pad 1, the inner shim plate 3a, and the outer shim plate 4a, each of which has the above-described configuration, are overlapped with the state shown in FIGS. The pad assembly 14 is used. That is, the inner body portion 7 of the inner shim plate 3a is moved to the pressure plate 2 while the inner locking pieces 8a, 8b, 8c are engaged with the locking recess 10 and the step portions 11, 11. On top of the back. In this state, the inner shim plate 3a is combined with the pressure plate 2 in a state where displacement in the circumferential direction and the radial direction is limited. Further, the outer body portion 12 of the outer shim plate 4a is overlaid on the outer surface side of the inner body portion 7 of the inner shim plate 3a. For this purpose, both the circumferential elastic pieces 15a and 15b and the both radial elastic pieces 19a and 19b provided on the inner shim plate 3a side and the both circumferential direction transparent pieces provided on the outer shim plate 4a side are provided. The holes 23a and 23b and the radial through holes 25a and 25b are aligned.

  From this state, the outer shim plate 4a is strongly pressed toward the inner shim plate 3a. Then, the circumferential elastic pieces 15a and 15b and the radial elastic pieces 19a and 19b are elastically deformed, and the bases of the circumferential circumferential receiving plates 24a and 24b and the radial radial receiving plates 26a and 26b are used. Pass through the end. After the passage, the elastic pieces 15a, 15b, 19a, 19b are elastically restored and engage with the receiving plate portions 24a, 24b, 26a, 26b, respectively. As a result, separation of the inner shim plate 3a and the outer shim plate 4a is prevented. That is, in this state, the inner locking pieces 8a, 8b, and 8c sandwich the pressure plate 2 from both sides in the radial direction, thereby preventing the pad 1 and the inner shim plate 3a from being separated. Further, the inner shim plate 3a and the outer shim plate 4a are prevented from being separated by the engagement between the elastic pieces 15a, 15b, 19a, 19b and the receiving plate portions 24a, 24b, 26a, 26b. As a result, the components 1, 3a, 4a of the disc brake pad assembly 14 are prevented from being carelessly separated, and the handleability of the disc brake pad assembly 14 can be improved.

  According to the disc brake pad assembly 14 of the present example configured as described above, the outer shim plate 4a can always be displaced in the circumferential direction and the radial direction with respect to the inner shim plate 3a during non-braking. it can. That is, in a non-braking state in which the disc brake pad assembly 14 is not pressed against the side surface of the rotor by the pressing surface which is the front end surface of the piston or the inner side surface of the caliper claw, the inner and outer side surfaces of the outer shim plate 4a The surface pressure of the contact portion between the outer surface of the inner shim plate 3a and the pressing surface is reduced or lost. As a result, the outer shim plate 4a is in any of the circumferential direction and the radial direction with respect to the inner shim plate 3a by the elasticity of the circumferential elastic pieces 15a and 15b and the radial elastic pieces 19a and 19b. Is also moved (returned) to the neutral position. In this state, the outer shim plate 4a can be displaced relative to the inner shim plate 3a in either the circumferential direction or the radial direction.

  When braking is performed from such a neutral state, the inner shim plate 3a, together with the pressure plate 2 of the pad 1, is brought into the circumferential direction and the radial direction by the brake torque based on the friction between the lining 6 of the pad 1 and the side surface of the rotor. It tends to be displaced. In other words, the inner shim 3a tends to be displaced with respect to the front end surface of the piston and the inner side surface of the caliper claw portion with braking. The outer surface of the outer shim plate 4a is in contact with the tip surfaces of these pistons and the inner surface of the caliper claw, and the outer shim plate 4a is in any direction (circumferential and radial directions) with respect to the inner shim plate 3a. ) Is also relatively displaceable. Therefore, based on the relative displacement between the shim plates 4a and 3a, displacement of the front end surface of the piston and the inner surface of the caliper claw portion and the pad 1 can be allowed. As a result, it is easy to stabilize the posture of the pad 1 at the time of braking, and it is possible to sufficiently relieve squeal and uneven wear at the time of braking.

  Further, in the case of the structure of this example, the width dimension w of the intermediate portion including the curved portions 17 and 21 among the elastic pieces 15a, 15b, 19a and 19b is kept small. Therefore, the elasticity of each of the elastic pieces 15a, 15b, 19a, 19b is made appropriate (suppressed low), and the ease of displacement of the outer shim plate 4a (during braking) with respect to the inner shim plate 3a is ensured. In addition, the posture of the pad 1 during braking can be further stabilized. Note that, by reducing the width dimension w, the possibility that the elastic pieces 15a, 15b, 19a, 19b are damaged cannot be completely denied. However, the width dimension W of the part located in each said through-hole 23a, 23b, 25a, 25b in the base end part of these each elastic piece 15a, 15b, 19a, 19b is large enough, and this part is missing. There is no. And the engagement state of this part and each said through-hole 23a, 23b, 25a, 25b is maintained. Therefore, even if the elastic pieces 15a, 15b, 19a, 19b are damaged, the outer shim plate 4a does not fall off when the shim plates 3a, 4a are assembled to the disc brake. As for squeezing and uneven wear suppression, the same effects as those of the conventional structure can be secured.

[Second Example of Embodiment]
FIGS. 13-21 has shown the 2nd example of embodiment of this invention corresponding to Claims 1-4 and 8. FIG. In the case of this example, a pair of radial elastic structures 27 and 27 and radial receiving plates 28 and 28 are provided.
Of these, both radial elastic structural portions 27, 27 are provided at portions near both ends in the circumferential direction of the radially inner end edge of the outer body portion 12 of the outer shim plate 4b. FIG. 13 and FIG. As shown in FIG. 2, each is composed of a pair of elastic pieces 29a and 29b. Each of the elastic pieces 29a and 29b protrudes from both circumferential edges of an elastic metal plate such as a stainless steel plate, which constitutes the outer shim plate 4b, and has a substantially L-shaped protruding portion bent in the opposite direction. The outer shim plate 4b is bent at a substantially right angle toward the side opposite to the pressure plate 2 to be assembled. Further, the tip portions of the pair of elastic pieces 29a and 29b constituting the both radial direction elastic structure portions 27 and 27 overlap each other in the radial direction. Further, in the assembled state at the time of use, which will be described later, each of the elastic pieces 29a and 29b has elasticity in a direction in which the tip portions thereof are brought close to each other.

  Further, as shown in FIG. 13 and FIG. 14A, the both radial direction receiving plate portions 28 and 28 are radially inner end portions of the inner body portion 7 of the inner shim plate 3b. Thus, each of the elastic pieces 29a, 29b constituting the both radial direction elastic structure portions 27, 27 is provided in a portion aligned with the portion between the tip portions. The two radial receiving plate portions 28 and 28 are surrounded on three sides by a U-shaped cut formed in the radially inner end portion of the inner main body portion 7 near the both ends in the circumferential direction. The bent portion is bent to the opposite side of the pressure plate 2 and the intermediate portion is folded back 180 degrees to form a U-shape. Although it is not necessary to give elasticity to the radial direction receiving plate portions 28, 28, it is free to give them. Further, the thickness dimension in the radial direction of both the radial direction receiving plate portions 28, 28 is larger than the interval between the mutually opposing surfaces of the tip portions in the free state of the respective elastic pieces 29a, 29b.

  Then, in order to assemble the disc brake pad assembly 14a of this example, as shown in FIGS. 15 to 18, the inner body portion 7 of the inner shim plate 3b is overlapped with the back surface of the pressure plate 2, and further this inner body. With the outer body portion 12 of the outer shim plate 4b superimposed on the outer surface side of the portion 7, the radial receiving plate portions 28, 28 are elastically sandwiched between the elastic pieces 29a, 29b. . In this state, the inner shim plate 3b provided with the two radial direction receiving plate portions 28, 28 is in contrast to the outer shim plate 4b provided with the two radial direction elastic structure portions 27, 27. , 29b are combined so as to be displaceable in the radial direction based on the elastic deformation of 29b. The structure for enabling the inner shim plate 3b to be displaced in the circumferential direction with respect to the outer shim plate 4b is the same as the first example of the above-described embodiment, and therefore, the overlapping description is omitted. Omitted.

  According to the disc brake pad assembly 14a of the present example configured as described above, the two-diameter elastic structures 27, 27 are connected to a piston 30, a caliper 31, a support 32, as shown in FIGS. Of course, it can be installed in a portion where it does not interfere, and it can be installed in a portion out of the opening of the piston 30. For example, when the disc brake pad assembly 14a is assembled to the outer pad, the circumferential elastic pieces 15a, 15b and the circumferential receiving plates 24a, 24b are also formed as shown in FIGS. Neither the radial elastic structure 27, 27 nor the both radial receiving plates 28, 28 interfere with any of the piston 30, the caliper 31, and the support 32.

  Further, when the disc brake pad assembly 14a is assembled to the inner pad, as is apparent from FIGS. 19 and 21, the circumferential elastic pieces 15a and 15b and the circumferential receiving plates 24a and 24b are also formed on the both sides. Neither the radial elastic structure 27, 27 nor the both radial receiving plates 28, 28 interfere with any of the piston 30, the caliper 31, or the support 32, and the opening of the piston 30 It is not located inside. Therefore, when the pad with worn lining 6 is replaced, the caliper 31 can be displaced with respect to the support 32 while the support 32 is fixed to the vehicle body. That is, one of the pair of guide pins that support the caliper 31 with respect to the support 32 so as to be capable of displacement in the axial direction is extracted, and the caliper 31 is supported with the other guide pin as the center. With respect to 32, the pad can be replaced by retracting radially outward.

[Third example of embodiment]
22 to 28 show a third example of the embodiment of the invention corresponding to claims 1 and 10 to 12. In the case of this example, a pair of inclined elastic pieces 33, 33, inclined receiving plate portions 34, 34, and support portions 35, 35 are provided. Then, the inner shim plate 3c is elastically pressed against the outer shim plate 4c by the both inclined elastic pieces 33, 33, in the circumferential central portion and radially outward, and by the both support portions 35, 35. The pressing force by the both inclined elastic pieces 33, 33 is supported.

  The inclined elastic pieces 33, 33 are provided on the opposite side of the pressure plate 2 with the base portion of the L-shaped extension portion extending from the end edge of the outer body portion 12 of the outer shim plate 4 c at both ends in the circumferential direction. And bent at right angles. The respective distal end portions are inclined elastic pressing plate portions 36, 36 that are inclined with respect to the radial direction and the circumferential direction, and each distal end edge is a free end that is not continuous with any portion. These two inclined elastic pressing plate portions 36, 36 are inclined with respect to the circumferential direction and the radial direction. Specifically, it inclines outward with respect to the diametrical direction (in a direction in which the extent to which the distance between the diametrical areas increases toward the outer side in the radial direction). Further, the both inclined receiving plate portions 34, 34 are bent from the edge of the inner body portion 7 of the inner shim plate 3c toward the opposite side of the pressure plate 2 from the ends of the inner body portion 7 in the circumferential direction. The both inclined receiving plate portions 34 and 34 are also inclined in the same direction as the both inclined elastic pressing plate portions 36 and 36. In the case of this example, the end portions of the both inclined receiving plate portions 34 and 34 are folded back into a U shape, and the both inclined receiving plate portions 34 and 34 are given a certain degree of elasticity.

  Further, the inner body portion 7 of the inner shim plate 3c is overlaid on the back surface of the pressure plate 2, and the outer body portion 12 of the outer shim plate 4c is overlaid on the outer surface side of the inner body portion 7. The radially outer surface and the circumferential inner surface of the tip end portions of the both inclined elastic pressing plate portions 36, 36 are elastically applied to the radially inner side surface and the circumferential outer surface of the both inclined receiving plate portions 34, 34. Touching. And the said inner side shim board 3c is elastically pressed toward the circumferential direction center part and radial direction outward with respect to the said outer side shim board 4c.

  On the other hand, both the support portions 35 and 35 are portions near both ends in the circumferential direction of the inner and outer body portions 7 and 12, and the positions in the radial direction are the both inclined elastic pieces 33 and 33 and the both inclined receiving plate portions 34. , 34 is provided on the outer side portion. And the elastic force of both said inclination elastic pieces 33 and 33 is supported, allowing the relative displacement regarding the circumferential direction and radial direction of both said shim board 3c, 4c. Such both support parts 35, 35 are provided with second inclined elastic pieces 37, 37 and second inclined receiving plate parts 38, 38, respectively. The configurations of the second inclined elastic pieces 37, 37 and the second inclined receiving plate portions 38, 38 are the same as the both inclined elastic pressing plate portions 36, 36 and the both inclined receiving plate portions 34, 34. The inclination direction is different. And by the said support parts 35 and 35, the said inner shim board 3c is elastically pressed toward the circumferential direction center part and radial direction inner side with respect to the said outer shim board 4c.

  In short, in the case of this example, the combination of the both inclined elastic pieces 33 and 33 and the both inclined receiving plate portions 34 and 34 and the both support portions 35 and 35 make the above-mentioned outer shim plate 4c the above-mentioned. The inner shim plate 3c is elastically pressed toward the central portion in the circumferential direction and at the same time is elastically pressed toward the neutral position in the radial direction. Also in this example, both of the inclined elastic pieces 33, 33, the inclined receiving plates 34, 34, and the support portions 35, 35 are the piston 30, the caliper 31, and the support 32. Since it does not interfere with any of (refer FIGS. 19-21), replacement | exchange of a pad can be performed easily.

[Fourth Example of Embodiment]
29 to 35 show a fourth example of the embodiment of the invention corresponding to claims 1 and 10 to 12, respectively. Also in this example, the second inclined elastic pieces 37a, 37a constituting the pair of support portions 35a, 35a are on the outer shim plate 4d side, and the second inclined receiving plate portions 38a, 38a are on the inner shim plate 3d side. , Each provided. Then, the outer surfaces in the radial direction and the circumferential direction of the tip portions of the second inclined elastic pieces 37a, 37a are elastically applied to the inner surfaces in the radial direction and the circumferential direction of the second inclined receiving plate portions 38a, 38a. It is in contact. In the case of this example, with such a configuration, the outer shim plate 4d is elastically pressed against the inner shim plate 3d toward the central portion in the circumferential direction by the support portions 35a and 35a. It is elastically pressed inward in the radial direction. The configuration and operation of the other parts are the same as in the third example of the embodiment described above.

[Fifth Example of Embodiment]
36 to 42 show a fifth example of the embodiment of the invention corresponding to claims 1 and 10 to 12. In the case of this example, the pair of inclined elastic pieces 33a and 33a is formed by using the pressure plate 2 as the base of the extending portion that extends from the edge of the outer shim plate 4e that is closer to the inner diameter of the outer body portion 12 in the circumferential direction. And bent up to the opposite side, and the middle part is folded back into a U shape. And among these inclined elastic pieces 33a, 33a, the portion on the tip side with respect to the intermediate portion folded back in the U-shape is inclined with respect to the radial direction and the circumferential direction, respectively, and the respective leading edges are both The inclined elastic pressing plate portions 36a and 36a are free ends that are not continuous. These two inclined elastic pressing plate portions 36a, 36a are inclined in a direction in which the distance between them increases as it goes outward in the radial direction. In the case of this example, the pair of inclined receiving plate portions 34a, 34a is located at both end portions in the circumferential direction of the inner body portion 12 of the inner shim plate 3e from the edge of the portion aligned with the inclined elastic pieces 33a, 33a. And bent toward the opposite side of the pressure plate 2. Then, the radially inner side surface and the circumferential outer side surface of the both inclined elastic pressing plate portions 36a and 36a, and the radially outer side surface and the circumferential inner side surface of the both inclined receiving plate portions 34a and 34a are elastically connected. It is made to contact. As a result, the inner shim plate 3e is moved relative to the outer shim plate 4e on the basis of the elastic deformation of both the inclined elastic pieces 33a, 33a and the tip side portions of the inclined receiving plate portions 34a, 34a. It is elastically pressed toward both sides in the circumferential direction and radially inward. In other words, the outer shim plate 4e is elastically pressed against the inner shim plate 3e toward the center in the circumferential direction and outward in the radial direction.

  In the case of this example, the two inclined elastic pieces 37b, 37b and the two second inclined receiving plate portions 38b, 38b constituting the pair of support portions 35b, 35b are configured by the two inclined elastic pieces 33a, 33a and It is the same as both the said inclination receiving plate parts 34a and 34a, and the inclination directions differ. In other words, the second inclined elastic pieces 37b, 37b are formed by pressing the base portion of the extending portion extending from the edge of the outer diameter portion of the outer body portion 12 of the outer shim plate 4e toward the outer diameter. Bending to the opposite side to 2, and the middle part is folded back into a U shape. And among these 2nd inclination elastic pieces 37b and 37b, the both ends inclination elastic press board part 36a, 36a is set to the radial direction and the circumferential direction about the part of the front end side rather than the intermediate part folded in U shape, respectively. The second inclined elastic pressing plate portions 42 and 42 are inclined in directions different from the above, and the respective leading edges are free ends that are not continuous with any portion. These second inclined elastic pressing plate portions 42, 42 are inclined in a direction in which the distance between them becomes narrower toward the outside in the radial direction. Further, the second inclined receiving plate portions 38b, 38b are both end portions in the circumferential direction of the inner body portion 7 of the inner shim plate 3e, from the edge of the portion aligned with the second inclined elastic pieces 37b, 37b, It is bent toward the side opposite to the pressure plate 2. Then, the outer surfaces in the radial direction and the circumferential direction of the second inclined elastic pressing plates 42, 42 and the inner surfaces in the radial direction and the circumferential direction of the second inclined receiving plates 38b, 38b are elastically connected. It is made to contact. In this state, the support portions 35b and 35b support the pressing force by the both inclined elastic pieces 33a and 33a (and the pressing force by the both inclined receiving plate portions 34a and 34a). Specifically, based on the elastic deformation of both the second inclined elastic pieces 37b, 37b and the tip side portions of the second inclined receiving plate portions 38b, 38b, the outer shim plate 4e is deformed. The inner shim plate 3e is elastically pressed toward both sides in the circumferential direction and radially outward. In other words, the outer shim plate 4e is elastically pressed against the inner shim plate 3e toward the center in the circumferential direction and radially inward. The structure and operation of the other parts are the same as in the third example of the embodiment described above.

  In the case of this example, the elasticity of the both inclined elastic pieces 33a, 33a and the both inclined receiving plate portions 34a, 34a (the two second inclined elastic pieces 37b, 37b and the second inclined receiving plate portion 38b). , 38b) is substantially equal to each other. Therefore, the both inclined elastic pieces 33a and 33a function as inclined receiving plate portions (the second inclined elastic pieces 37b and 37b function as second inclined receiving plate portions), respectively, and the both inclined receiving plate portions 34a. , 34a can function as inclined elastic pieces (the second inclined receiving plate portions 38b and 38b function as second inclined elastic pieces, respectively).

[Sixth Example of Embodiment]
43 to 49 show a sixth example of the embodiment of the invention corresponding to claims 1, 10, 11, and 13. In the case of this example, the pair of support portions 35c and 35c provided at the radially outward portions of both the inner and outer shim plates 3f and 4f in the circumferential direction are provided with a pair of radial elastic pieces 39 and 39, respectively. And the radial direction receiving plate portions 40, 40. Of these, the radially elastic pieces 39, 39 are configured to apply pressure to the base portion of the L-shaped extending portion that extends from the radially outer end edge of the outer body portion 12 of the outer shim plate 4f near both ends in the circumferential direction. It is bent toward the opposite side of the plate 2. Then, the respective portions closer to the distal end are formed as radial elastic pressing plate portions 41 and 41 which are free ends in which the respective distal end edges are not continuous with any portion. Further, the both radial direction receiving plate portions 40, 40 are bent from the edge of the inner body portion 7 of the inner shim plate 3f toward the opposite side of the pressure plate 2 from the end portions in the circumferential direction.

  Further, the inner body portion 7 of the inner shim plate 3f is overlaid on the back surface of the pressure plate 2, and the outer body portion 12 of the outer shim plate 4f is overlaid on the outer surface side of the inner body portion 7. The radially inner side surfaces of the distal end portions of the radially elastic pressing plate portions 41, 41 constituting the both radially elastic pieces 39, 39 are elastically connected to the radially outer surface of the both radially receiving plate portions 40, 40. It is made to contact. Then, the inner shim plate 3f is elastically pressed toward the inner side in the radial direction against the outer shim plate 4f by the both support portions 35c and 35c. In the case of this example, the inner shim plate 3f is elastically pressed against the outer shim plate 4f toward the neutral position in the circumferential direction by a pair of left and right inclined pressing pieces 33, 33 and an inclined receiving plate portion. 34, 34 only. The structure and operation of the other parts are the same as in the third example of the embodiment described above. When the present invention is carried out, the shim plates provided with the radial elastic pieces 39, 39 and the radial receiving plates 40, 40 can be reversed.

  The structure of the embodiment described above allows the outer shim plates 4a to 4f to be slightly displaced with respect to the inner shim plates 3a to 3f in both the circumferential direction and the radial direction, and the pressing force is reduced. Are combined to return to the neutral position in a lost state. However, when implementing the present invention, a structure for positioning in the radial direction can be omitted. That is, in the case where the inner shim plate and the outer shim plate are structured to allow relative displacement mainly in the circumferential direction, a pair of circumferential elastic pieces, a circumferential through hole, and a circumferential receiving plate portion are provided. The radial elastic piece, the radial through hole, and the radial receiving plate portion (or the radial elastic structure portion and the radial receiving plate portion) can be omitted. Even if the radial elastic piece, the radial through hole, and the radial receiving plate portion (or the radial elastic structure portion and the radial receiving plate portion) are omitted, the circumferential elastic piece and the circumferential through hole It is possible to prevent the outer shim plate from falling off in the radial direction based on the engagement of (or the circumferential elastic structure portion and the circumferential receiving plate portion).

In addition, the direction in which each elastic piece or elastic structure, each through hole, and each receiving plate portion is formed does not necessarily coincide with the circumferential direction and the radial direction. As in the third to fifth examples of the above-described embodiment, they may be slightly deviated (for example, about 5 to 20 degrees) from these directions, or may be formed to be shifted by 45 degrees, for example. In short, the elastic pieces and the receiving plate portions may be engaged properly. For example, a structure in which a pair of circumferential elastic pieces, circumferential through-holes, and circumferential receiving plate portions are arranged in a state of being shifted by 45 degrees or more with respect to the circumferential direction (except when they are shifted by 90 degrees). Belongs to the technical scope of the present invention. Specifically, the structure in which each elastic piece or elastic structure, each through hole, and each receiving plate portion is formed at diagonal positions of a rectangular combination shim plate belongs to the technical scope of the present invention.
Further, the number of shim plates constituting the disc brake pad assembly of the present invention is not limited to two. The present invention can also be implemented with respect to a structure in which a third shim plate (for example, an intermediate shim plate) is sandwiched between a pressure plate and an inner shim plate or between an inner shim plate and an outer shim plate.

  Furthermore, although it is outside the technical scope of the present invention, a structure for positioning in the circumferential direction can be omitted. Specifically, in a case where the inner shim plate and the outer shim plate have a structure that allows relative displacement mainly in the radial direction, a pair of radial elastic pieces, radial through holes, and radial receiving plate portions. (Or a radial elastic structure portion and a radial receiving plate portion) and a circumferential elastic piece, a circumferential through hole, and a circumferential receiving plate portion (or a circumferential elastic structure portion and a circumferential receiving plate). The board part) can be omitted. That is, it is known that squealing and uneven wear can be suppressed to some extent even by relatively displacing the inner shim plate and the outer shim plate only in the radial direction. With such a structure, a pair of radial elastic pieces, a radial through hole, and a radial receiving plate portion (or a radial elastic structure portion and a radial receiving plate portion) are provided, and a circumferential elastic piece and The circumferential through hole and the circumferential receiving plate portion (or the circumferential elastic structure portion and the circumferential receiving plate portion) are omitted, and the relative displacement between the inner shim plate and the outer shim plate is mainly the diameter. It is also possible to realize a structure that enables the direction. Even if the circumferential elastic piece, the circumferential through hole, and the circumferential receiving plate portion (or the circumferential elastic structure portion and the circumferential receiving plate portion) are omitted, the radial elastic piece and the radial through hole are omitted. (Or the radial elastic structure portion and the radial receiving plate portion) can prevent the outer shim plate from falling off in the circumferential direction.

DESCRIPTION OF SYMBOLS 1 Pad 2 Pressure plate 3, 3a, 3b, 3c, 3d, 3e, 3f Inner shim board 4, 4a, 4b, 4c, 4d, 4e, 4f Outer shim board 5, 5a Combination shim board 6 Lining 7 Inner body part 8a , 8b, 8c Inner locking piece 9 Through hole 10 Locking recess 11 Stepped portion 12 Outer body portion 13a, 13b, 13c Outer locking piece 14, 14a Disc brake pad assembly 15a, 15b Circumferential elastic piece 16 Circumferential direction Substrate part 17 Circumferentially curved part 18 Circumferential elastic pressing plate part 19a, 19b Radial elastic piece 20 Radial substrate part 21 Radial curved part 22 Radial elastic pressing plate part 23a, 23b Circumferential through hole 24a, 24b Receiving plate portion 25a, 25b Radial through hole 26a, 26b Radial receiving plate portion 27 Radial elastic structure 28 Radial receiving plate portion 29a, 29b Sex piece 30 piston 31 caliper 32 support 33 inclined elastic piece 34 inclined receiving plate portion 35, 35a, 35b, 35c support portion 36 inclined elastic pressing plate portion 37, 37a second inclined elastic piece 38, 38a second inclined receiving plate portion 39 Radial elastic piece 40 Radial direction receiving plate portion 41 Radial direction elastic pressing plate portion 42 Second inclined elastic pressing plate portion

Claims (13)

The lining is attached and fixed to the front surface of the pressure plate, and the displacement in the circumferential direction and radial direction is limited on the pad arranged on the portion facing the axial side surface of the rotor and the back surface of the pressure plate that constitutes this pad. A disc brake pad assembly comprising an inner shim plate having a flat inner body portion and an outer shim plate having a flat outer body portion superimposed on the inner shim plate. In a solid,
At least one of the inner and outer shim plates is made of a metal plate having elasticity,
A pair of inner bent raising structures provided in a bent state with respect to the thickness direction of the inner main body part at two positions separated in the circumferential direction among the inner main body parts of the inner shim plate;
Of the outer body portion of the outer shim plate, a state where the outer body portion is bent and raised in the same direction as both inner bent raised structure portions with respect to the thickness direction of the outer main body portion in the portion aligned with the inner bent raised structure portions. Provided with a pair of outer bend-raising structures,
In the state where the inner body part is overlaid on the back surface of the pressure plate and the outer body part is overlaid on the outer surface side of the inner body part, both the inner bent structure part and the both outer bent structure parts are provided. , At least in a state of generating a pressing force in the circumferential direction,
The outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate on the basis of elastic deformation of at least one of the inner bent raised structure portion and the outer bent raised structure portion. Disc brake pad assembly characterized by A pair of circumferential elastic pieces, a circumferential through hole, and a circumferential receiving plate part,
Each of the circumferential elastic pieces, each corresponding to the inner bent and raised structure portion, is located on the opposite side of the pressure plate from two positions separated from each other in the circumferential direction in the inner body portion of the inner shim plate. A circumferential substrate portion continuous with the inner body portion of the inner shim plate, and the circumferential substrate, wherein each intermediate portion is folded back into a U-shape in a different direction with respect to the circumferential direction. A circumferentially curved portion that is continuous from the leading edge of the circumferential portion, and a circumferential elastic pressing plate portion that is continuous from the leading edge of the circumferentially curved portion and has the distal edge as a free end that is not continuous with any part. And
The circumferential through holes are formed in portions of the outer body portion of the outer shim plate that are aligned with the circumferential elastic pieces, and each has a size that allows the circumferential elastic pieces to be inserted therethrough. Is,
Each of the circumferential receiving plate portions corresponding to the both outward bending raised structure portions of the both circumferential direction through holes from the opposite ends of the circumferential direction to the opposite side of the pressure plate. Is bent in a state of protruding toward
In the state where the inner main body portion is overlaid on the back surface of the pressure plate and the outer main body portion is overlaid on the outer surface side of the inner main body portion, the bilateral elastic pieces are elastically applied to the bilateral receiving plate portions. By making it abut,
2. The disc brake pad assembly according to claim 1, wherein the outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate based on elastic deformation of the two circumferential elastic pieces.   Of the circumferential elastic pieces, the width in the radial direction of at least the circumferential substrate portion located inside the circumferential through hole is at least larger than the width in the same direction of the circumferential curved portion. 3. The disc brake pad assembly of claim 2, wherein the disc brake pad assembly is large.   The circumferential elastic pressing plate portion constituting the circumferential elastic pieces is inclined in a direction in which an angle formed with the inner main body portion of the inner shim plate is an acute angle, and the both circumferential receiving plate portions are The inner shim plate and the outer shim are inclined based on the engagement between the circumferential elastic pressing plate portion and the circumferential receiving plate portion, with the angle formed by the outer body portion of the outer shim plate being an acute angle. The pad assembly for a disc brake according to any one of claims 2 to 3, wherein separation from the plate is prevented. A pair of radial elastic pieces, a radial through hole, and a radial receiving plate part,
Each of the pair of radial elastic pieces is bent and raised in a state of projecting toward the opposite side of the pressure plate from two positions separated from each other with respect to the radial direction in the inner main body portion of the inner shim plate. The intermediate portion of the inner shim plate is folded in a U-shape in a direction different from each other in the radial direction, the radial substrate portion continuing to the inner body portion of the inner shim plate, and the radial curvature continuing from the leading edge of the radial substrate portion And a radial elastic pressing plate portion that is continuous from the distal end edge of the radially curved portion, and the distal end edge is a free end that is not continuous with any part,
Each of the radial through holes is formed in a portion of the outer body portion of the outer shim plate that is aligned with the two radial elastic pressing pieces, each having a size that allows the radial elastic pressing pieces to be inserted. Have
The both radial direction receiving plate portions are bent and raised in a state of projecting toward the opposite side of the pressure plate from the opposite edges of the circumferential direction among the circumferential direction through holes,
In the state where the inner main body portion is overlapped with the back surface of the pressure plate and the outer main body portion is overlapped with the outer surface side of the inner main body portion, the both radial elastic pieces are elastically applied to the both radial receiving plate portions. By making it abut,
5. The disc brake according to claim 1, wherein the outer shim plate is displaceable in a radial direction with respect to the inner shim plate based on elastic deformation of the both radial elastic pieces. Pad assembly.   Of the radial elastic pieces, at least a width of a portion of the radial substrate portion located inside the radial through hole in the circumferential direction is at least larger than a width in the same direction of the radial curved portion. 6. The disc brake pad assembly of claim 5, wherein the pad assembly is large.   The radial elastic pressing plate portion constituting the radial elastic piece is inclined in a direction in which an angle formed with the inner main body portion of the inner shim plate is an acute angle, and the radial radial receiving plate portion is The inner shim plate and the outer shim are inclined based on the engagement between the radial elastic pressing plate portion and the radial receiving plate portion, with the angle formed by the outer body portion of the outer shim plate being an acute angle. The disc brake pad assembly according to any one of claims 5 to 6, wherein separation from the plate is prevented. Each of the pair includes a radial elastic structure portion and a radial receiving plate portion, and both of these radial elastic structure portions are each surrounded by a part of the inner peripheral edge portion of the outer body portion of the outer shim plate. A pair of elastic pieces, each of which is bent toward the opposite side of the pressure plate from two positions spaced apart in the direction, each of which is overlapped with each other in the radial direction. The plate portion is a portion of the inner body portion of the inner shim plate that is bent toward the opposite side of the pressure plate from a portion that matches the portion between the tip portions of each elastic piece,
In a state where the inner body portion is overlaid on the back surface of the pressure plate and the outer body portion is overlaid on the outer surface side of the inner body portion, the bi-directional receiving plate portion is placed between the elastic pieces. By pinching elastically,
The disc brake pad assembly according to any one of claims 1 to 4, wherein the outer shim plate is displaceable in a radial direction with respect to the inner shim plate based on elastic deformation of each elastic piece. . A pair of circumferential elastic structure portions and a circumferential receiving plate portion,
Each of the circumferential elastic structural portions each corresponding to the both outward bending raised structural portions is bent from both circumferential edges of the outer body portion of the outer shim plate toward the opposite side of the pressure plate, A pair of elastic pieces each having respective tip portions superimposed on each other in the circumferential direction are provided, and the both circumferential direction receiving plate portions are a part of the inner main body portion of the inner shim plate. It is bent toward the opposite side of the pressure plate from the part that matches the part between the tip parts,
In a state where the inner body portion is overlaid on the back surface of the pressure plate and the outer body portion is overlaid on the outer surface side of the inner body portion, the circumferential receiving plate portion is placed between the elastic pieces. By pinching elastically,
The disc brake pad assembly according to claim 1 or 8, wherein the outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate based on elastic deformation of each elastic piece. A pair of inclined elastic pieces and an inclined receiving plate part,
The two inclined elastic pieces include a base portion of an extending portion that extends from an end edge of a circumferentially opposite end portion of the main body portion of one of the inner shim plate and the outer shim plate. It is formed based on bending toward the opposite side of the plate, and each tip end portion is inclined with respect to the radial direction and the circumferential direction, and each tip edge is a free end that is not continuous with any portion. It is an inclined elastic pressing plate part,
The two inclined receiving plate portions are bent toward the opposite side of the pressure plate from the edge of the inner shim plate and the outer shim plate on the other side of the body portion of the other shim plate in the circumferential direction. With
The two inclined elastic pieces are configured with the inner body portion of the inner shim plate overlapped with the back surface of the pressure plate and the outer body portion of the outer shim plate overlapped with the outer surface side of the inner body portion. By elastically pressing the both inclined receiving plate portions in a direction inclined with respect to the circumferential direction and the radial direction by the inclined elastic pressing plate portions, the outer shim plate is moved based on the elastic deformation of the both inclined elastic pieces. The disc brake pad assembly according to claim 1, wherein the inner shim plate is displaceable in a circumferential direction and a radial direction.   Relative to at least the circumferential direction of the two shim plates at positions near the both ends in the circumferential direction of the main body portions of the inner and outer shim plates, the radial positions are different from the inclined elastic pieces and the inclined receiving plate portions. 11. The disc brake pad assembly according to claim 10, wherein a pair of support portions for supporting the elastic force of the both inclined elastic pieces while allowing displacement are provided. The both support portions each include a pair of second inclined elastic pieces and a second inclined receiving plate portion,
Of these, the second inclined elastic pieces are formed by extending the base portion of the extending portion extending from the edge of the circumferentially opposite ends of the main body portion of one of the inner shim plate and the outer shim plate. It is formed based on bending toward the opposite side of the pressure plate, and each tip end portion is inclined in a direction different from the both inclined elastic pieces with respect to the radial direction and the circumferential direction, The tip edge is a second inclined elastic pressing plate part that is a free end not continuous with any part,
The second inclined receiving plate portions are bent toward the opposite side of the pressure plate from the end edges of the main body portion of the other shim plate of the inner shim plate and the outer shim plate. It was
In a state where the inner body portion of the inner shim plate is overlapped with the back surface of the pressure plate, and the outer body portion of the outer shim plate is further overlapped with the outer surface side of the inner body portion, the second inclined elastic pieces are The second inclined elastic pressing plate portion constitutes both the second inclined receiving plate portions in a direction inclined with respect to the circumferential direction and the radial direction, wherein the both inclined elastic pieces are different from the pressing direction in the both inclined receiving plate portions. 12. The outer shim plate can be displaced in a circumferential direction and a radial direction with respect to the inner shim plate based on elastic deformation of both the second inclined elastic pieces by being elastically pressed. Disc brake pad assembly. The both support parts each include a pair of radial elastic pieces and a radial receiving plate part,
Of these, the radially elastic piece is a base portion of an extending portion extending from a radial end edge of a circumferentially opposite end portion of the main body portion of one of the inner shim plate and the outer shim plate. Is formed on the opposite side of the pressure plate, and each distal end portion is a radially elastic pressing plate portion that is a free end in which each distal end edge is not continuous with any portion. ,
The radial receiving plate portion is bent toward the opposite side of the pressure plate from an edge of a portion near the both ends in the circumferential direction of the main body portion of the other shim plate of the inner shim plate and the outer shim plate. With
The double-diameter elastic piece is configured with the inner body portion of the inner shim plate overlapped with the back surface of the pressure plate and the outer body portion of the outer shim plate overlapped with the outer surface side of the inner body portion. The outer shim plate is pressed against the inner shim plate based on the elastic deformation of the two radial elastic pieces by elastically pressing the two radial receiving plate portions in the radial direction by the radial elastic pressing plate portion. 12. The disc brake pad assembly according to claim 11, wherein the disc brake pad assembly is displaceable in a radial direction.

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