JP2013036558A - Pad assembly for disk brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a structure which can sufficiently reduce squeal and uneven wear at braking because behavior of a pad 1 at braking becomes smoother and at the same time is easy to stabilize its attitude by forming a state that can displace an outside shim plate 4a with respect to an inside shim plate 3a in the circumferential direction and radial direction at all times in non-braking states.SOLUTION: A pad assembly includes a pair of inside bending formed plate parts 19, 19 on an edge part of both ends in the circumferential direction of the inside shim plate 3a. Furthermore, a pair of outside bending formed plate parts 21, 21 folded back are provided in U-shaped manner on an edge part of both ends in the circumferential direction of the outside shim plate 4a. It is configured to bring elastic press parts 24, 24 of both of the outside bending formed plate parts 21, 21 into elastically close contact with both of the inside bending formed plate parts 19, 19 in assembled state and to situate the outside shim plate 4a in a neutral state with respect to the inside shim plate 3a in non-braking states.

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. If the postures of both pads become unstable during braking, the behavior of both pads will not be smooth, and both pads will vibrate and generate noise called squeal, and the degree of uneven wear of the lining is remarkably high. Easy to be.

  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. 23 to 25 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. , 11 are formed. 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, and 8c while being engaged with both stepped portions 11 and 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 stepped portions 11 and 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, 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. The above-described problem occurs not only when the outer shim plate 4 is displaced with respect to the pressure plate 2 after assembly, but also when the outer shim plate 4 is not assembled at the neutral position during assembly. Also, 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.

Each of the disc brake pad assemblies of the present invention includes a pad, an inner shim plate, and an outer shim plate, as in the conventional disc brake pad assembly described above.
In particular, each of the disc brake pad assemblies of the present invention includes a pair of an inner bent plate portion and an outer bent plate portion.
Both of these inner bent plate portions are provided in a state where they are bent and raised to the opposite side of the pressure plate from both circumferential edges of the inner main body portion of the inner shim plate.
The both outer bent plates are bent and raised from opposite circumferential edges of the outer body portion of the outer shim plate, for example, made of an elastic metal plate, to the opposite side of the pressure plate.

Further, in the case of the disc brake pad assembly according to the first aspect, the outer bent plate portions are folded back in a U-shape at the intermediate portions. Then, a base portion in which the respective base end edge portions are connected to the circumferential end edge of the outer body portion, a bending portion in which the base end edge is connected to the tip end edge of the base portion, and a tip end edge of the bending portion. And an elastic pressing part having a continuous base end edge.
The circumferential direction of the elastic pressing portions of the outer bent plate portions with the inner body portion overlapped with the back surface of the pressure plate and the outer body portion overlapped with the outer surface of the inner body portion. The outer side surface and the inner side surface in the circumferential direction of the inner bent plate portions are elastically contacted.
Then, the outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate, and in a state where no external force acts on both the shim plates, the positional relationship between the two shim plates in the circumferential direction is Based on the elasticity of the bent-up plate part, it is combined in a state of returning to the neutral position.

When the invention described in claim 1 as described above is carried out, for example, as in the invention described in claim 2, the radial direction bent from the both radial ends of the shim plates to the pressure plate side. The plate portion is engaged with both the inner and outer peripheral edge portions of the pressure plate. Then, the shim plates are positioned relative to the pressure plate in the radial direction.
Alternatively, as in the invention described in claim 3, by forming a through hole at the center in the width direction of the portion including at least the curved portion at the intermediate portion of the both outer bent raising plate portions, The force required for elastically deforming the elastic pressing portion of the raising plate portion is reduced.
Alternatively, as in the invention described in claim 4, by bending the both inner bending raising plate portions with respect to the inner main body portion over 90 degrees, the inner main body portion and the both inner bending raising plate portions. The angle between and is an acute angle. Moreover, the part which contact | abuts the circumferential direction inner side surface of these both inner side bending raising board part among the elastic press parts of the said both outer side bending raising board part is protruded in the circumferential direction outer side rather than the front-end edge of the said bending part. Then, the shim plates are prevented from being separated from each other based on the engagement between the elastic pressing portions of the outer bent plate portions and the inner side surfaces of the inner bent plate portions.

On the other hand, in the case of the invention described in claim 5, each of the inner bent plate portions is formed by folding an intermediate portion into a U shape. An inner base portion in which each base end edge portion is connected to the circumferential end edge of the inner main body portion, an inner curved portion in which the base end edge is continued to the distal end edge of the inner base portion, and the inner curved portion. An inner elastic pressing portion having a base end edge continuous with the distal end edge of the head.
The outer bent plate portions are also formed by folding the middle portion into a U shape. An outer base portion in which each base end edge portion is connected to the circumferential end edge of the outer body portion, an outer curved portion in which the base end edge is continued to the distal end edge of the outer base portion, and the outer curved portion. And an outer elastic pressing portion having a base end edge continuous with the distal end edge.
In addition, 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 inner side surface in the direction and the outer circumferential surface of the inner elastic pressing portions are elastically contacted.
And, in a state where the outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate and no external force acts on both the shim plates, the positional relationship between the two shim plates in the circumferential direction is the inner side, Based on the elasticity of the outer bent plates, combine them in a state where they return to the neutral position.

When carrying out the invention described in claim 5 as described above, for example, as in the invention described in claim 6, the width of the portion including at least the inner curved portion at the intermediate portion of the inner bent plate portion. A through hole is formed at the center in the direction. Then, the force required for elastically deforming the inner elastic pressing portions of the inner bent plate portions is reduced.
Alternatively, as in the invention described in claim 7, the outer diameter is extended from the both ends in the radial direction of the outer curved portions of the both outer bent raising plate portions in the radial direction and the tip portion is bent toward the pressure plate to The side and inner diameter side elastic pressing plate portions are used. Then, by causing the distal end portions of these elastic pressing plate portions to elastically abut against both end edges in the radial direction of the inner elastic pressing portion, the positional relationship between the shim plates in the radial direction is determined so that each outer diameter side Based on the elasticity of each elastic pressing plate portion on the inner diameter side, they are combined in a state of returning to the neutral position.

Furthermore, in the case of the invention described in claim 8, the inner bent plate portions are bent and raised from the portions near the both ends in the circumferential direction of the inner main body portion of the inner shim plate to the opposite side to the pressure plate.
The both outer bent plate portions are bent and raised from both circumferential edges of the outer main body portion of the outer shim plate to the opposite side of the pressure plate. The outer bent plate portions are formed by bending the base portion of the extending portion extending from both circumferential edges of the outer main body portion toward the side opposite to the pressure plate, and the portions near the leading ends thereof. Each of the tip edges is a circumferential elastic pressing plate portion that is a free end that is not continuous with any portion.
In addition, the inner side shim plate is overlapped with the inner body portion 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 inner side bending raising plate portions are elastically pressed in a direction approaching each other by a circumferential elastic pressing plate portion constituting the portion.
Then, the outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate, and the positional relationship between the two shim plates with respect to the circumferential direction is such that the outer shim plate is not subjected to external force. Based on the elasticity of the directional elastic pressing plate portion, they are combined in a state of returning to the neutral position.

When the invention described in claim 8 as described above is carried out, for example, as in the invention described in claim 9, the inner shim plate is spaced apart in the circumferential direction of the radially inward portion of the inner body portion. A pair of inner diameter side inner bent and raised plate portions are provided at the positions in a state where the inner plate is bent and raised from both positions to the opposite side of the pressure plate.
Also, a pair of inner peripheral side outer bends, each bent in a radial direction from two circumferentially spaced positions on the inner peripheral edge of the outer body portion of the outer shim plate, are separated from each other in the radial direction. 2 sets of radial direction elastic press units comprised by the raising plate part are provided. Each of the pair of inner peripheral edge side outward bending raising plate portions constituting these both radial elastic pressing units has a base portion of an extending portion extending from a circumferentially spaced portion of the inner peripheral edge of the outer body portion. It is formed based on bending toward the opposite side of the pressure plate. Also, each of the distal end portions is a radial elastic pressing plate portion that is a free end whose respective leading edge is not continuous with any portion, and a pair of radial elastic pressing plates constituting the same radial elastic pressing unit. The tip portions of the portions are overlapped in the radial direction.
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 bilateral elastic pressing is performed. The pair of radially elastic pressing plate portions constituting the unit elastically press the inner peripheral edge side inner bending raising plate portions from both radial directions.
The positional relationship between the two shim plates in the radial direction is such that the outer shim plate can be displaced in the radial direction with respect to the inner shim plate and no external force acts on both the shim plates. Based on the elasticity of the radial elastic pressing plate portion constituting the directional elastic pressing unit, they are combined in a state of returning to the neutral position.

  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, due to the elastic deformation of the pair of outer bent plates (in addition, in the case of the invention described in claim 5, by the elastic deformation of the pair of outer bent plates and inner bent plates), The outer shim plate moves (returns) to the neutral position with respect to the inner shim plate.

  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 outer bending plate portion ( In the case of the invention described in claim 5, the outer bent plate portion and the inner bent plate portion are elastically deformed (one of the elastic pressing portions of each bent raised plate portion on the rear side in the displacement direction). 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.

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. The orthographic view seen from the back side of a pad in the state after combining. The figure seen from the right side of FIG. The same view from above. The c section enlarged view of FIG. The orthographic projection figure which looked at the pad from the back side which shows another shape of a pressure plate. The d section enlarged view (A) and e section enlarged view (B) of FIG. The figure similar to FIG. 1 which shows the 2nd example of embodiment of this invention. The f section enlarged view of FIG. Similarly g section enlarged view. The perspective view which took out the inner side shim board and was seen from the same direction as FIG. The orthographic view seen from the back side of a pad in the state after combining. The figure seen from the right side of FIG. The same view from above. The figure similar to FIG. 1 which shows the 3rd example of embodiment of this invention. Similarly, the same figure as FIG. The orthographic view seen from the back side of a pad in the state after combining. The h section enlarged view of FIG. Similarly i section enlarged view. 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. The orthographic view seen from the back side of the pad in the same combination state.

[First example of embodiment]
FIGS. 1-8 has shown the 1st example of embodiment of this invention corresponding to Claims 1-4. 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 formed by attaching and fixing a lining 6 to the front surface of the pressure plate 2a. And the outer diameter side center latching recessed part 15 in the circumferential direction center part of the outer diameter side peripheral part of this pressure plate 2a, a pair of latching convex parts 16 and 16 in the circumferential direction both sides, An inner diameter side central locking recess 17 is formed in the central portion in the circumferential direction, and a pair of stepped portions 11 and 11 are also formed in portions near both ends in the circumferential direction. In addition, the inner shim plate 3a and the outer shim plate 4a may be separately mounted on the pressure plate 2a, or may be overlapped in advance to form a combination shim plate 5a. Even if the shim plates 3a and 4a are assembled to the pressure plate 2a in the front-rear direction, or the combination shim plate 5a is combined in advance, the completed structure of the disc brake pad assembly 14 is completed. 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 made of a corrosion-resistant metal plate such as a stainless steel plate, and is attached to the back surface of the pressure plate 2a in a state where displacement in the circumferential direction and the radial direction is limited. It has a flat inner body portion 7a, a plurality of inner locking pieces 18a, 18b, 18c, a plurality of through holes 9, 9, and a pair of inner bent plate parts 19, 19. These inner bent plates 19, 19 are strongly bent 90 degrees from both circumferential edges of the inner body portion 7a to the side opposite to the pressure plate 2a. Accordingly, the angle formed between the inner bent plates 19 and 19 and the inner body portion 7a is an acute angle, and the inner bent plates 19 and 19 are directed toward the respective leading edges (the pressure plate 2a). The more they move away from each other, the more they are inclined toward each other.

  The inner shim plate 3a as described above is directly assembled to the back surface of the pressure plate 2a. For this purpose, a pair of inner locking pieces 18a, 18b provided on the outer diameter side of the inner locking pieces 18a, 18b, 18c are positioned on both sides in the circumferential direction of the both locking projections 16, 16. At the same time, the inner locking piece 18 c on the inner diameter side is engaged with the inner locking recess 17 on the inner diameter side. In this state, of these inner locking pieces 18a, 18b, 18c, the distal end portions of the inner locking pieces 18a, 18b on the outer peripheral edge side are on the outer peripheral edge of the pressure plate 2a, and also on the inner peripheral edge side. The pieces 18c elastically contact the inner peripheral edge of the pressure plate 2a. Accordingly, the inner shim plate 3a is assembled to the back side of the pressure plate 2a in a state where displacement in the circumferential direction and the radial direction is limited.

  The outer shim plate 4a is made of a metal plate having corrosion resistance and elasticity, such as a stainless spring steel plate, and is slightly displaced in the circumferential direction on the back side of the pressure plate 2a via the inner shim plate 3a. It is possible and assembled in a state in which the radial displacement is limited. For this purpose, the outer shim plate 4a includes a flat outer body portion 12a, a plurality of outer locking pieces 20a, 20b, and 20c, and a pair of outer bent plates 21 and 21. These outer bent plate portions 21, 21 are each formed by folding an intermediate portion into a U shape, and include a base portion 22, a curved portion 23, and an elastic pressing portion 24. Of these, the base portion 22 is bent at a substantially right angle from the circumferential edge of the outer body portion 12a to the side opposite to the pressure plate 2a, and is continuous with the outer body portion 12a. ing. The curved portion 23 is folded back slightly 180 degrees outward in the circumferential direction from the distal end edge of the base portion 22 (in the direction in which the outer bent plate portions 21 and 21 are separated from each other). Further, the elastic pressing portion 24 has a base edge continuous to a distal end edge of the bending portion 23, and excluding a distal end bending portion formed at the distal end portion, from the distal end edge portion of the bending portion 23, The curved portion 23 extends in the tangential direction. Accordingly, the distance between the elastic pressing portions 24, 24 of the outer bent plate portions 21, 21 is toward the tip side (approaching the pressure plate 2a) except for the tip bending portion formed at each tip portion. Inclined in directions away from each other. Further, a through-hole is formed in the central portion in the width direction of the outer bent plate portions 21 and 21 from the front half portion of the base portion 22 to the base half portion of the elastic pressing portion 24 through the curved portion 23. 25 is formed so that the elastic pressing portion 24 is easily elastically displaced.

  The outer shim plate 4a as described above is assembled to the back side of the pressure plate 2a via the inner shim plate 3a. For this purpose, among the outer locking pieces 20a, 20b, 20c, the outer locking piece 20a on the outer peripheral edge side is engaged with the outer peripheral side central locking recess 15 of the pressure plate 2a, and the inner peripheral edge side is engaged. The outer locking pieces 20b, 20c are locked to the inner peripheral edge of the pressure plate 2a at a portion between the step portions 11, 11. Based on the engagement between the outer locking pieces 20a, 20b, and 20c and the peripheral edge of the pressure plate 2a, the outer shim plate 4a is opposed to the pressure plate 2a with respect to the outer locking pieces 20a, 20b, and 20c. The elastic deformation is supported so as to be slightly displaceable in the radial direction. At the same time, the outer bent plate portions 21, 21 are sandwiched between the inner bent plate portions 19, 19. At this time, the elastic pressing portions 24 and 24 are pushed between the inner bending and raising plate portions 19 and 19 while elastically deforming the outer bending and raising plate portions 21 and 21.

  The outer shim plate 4a is supported with respect to the pressure plate 2a so that the outer shim plate 4a can be slightly displaced in the circumferential direction based on the elastic deformation of the outer bent plate portions 21, 21 with respect to the pressure plate 2a. For this reason, the circumferential width of the outer diameter side central locking recess 15 is made larger than the circumferential width of the outer locking piece 20a. In addition, the circumferential interval between the two stepped portions 11 and 11 is set larger than the circumferential interval between the circumferential outer edges of the outer locking pieces 20b and 20c. Since the elastic forces of the outer bent plate portions 21 and 21 act in the opposite directions with respect to the circumferential direction, both the shim plates 3a and 4a in the circumferential direction are not applied to the shim plates 3a and 4a. Will return to the neutral state. Accordingly, the outer shim plate 4a is in a non-braking state and can be displaced in any direction with respect to the circumferential direction. Further, as described above, the inner bending raising plate portions 19 and 19 are inclined so as to approach each other toward the respective leading edges, and the distance between the both elastic pressing portions 24 and 24 is directed to the leading end side. They are tilted away from each other. For this reason, the shim plates 3a and 4a are not inadvertently separated from each other based on the engagement between the inner bent plate portions 19 and 19 and the elastic pressing portions 24 and 24. Therefore, the handleability of the combination shim plate 5a formed by combining both the shim plates 3a and 4a can be improved.

  When the disc brake pad assembly 14 assembled to the pad 1 is assembled to the pad 1 and braking is performed by the disc brake, the outer shim plate 4 a is attached to the pad 1. Displaces reliably. That is, the position of the outer shim plate 4a is in a neutral position with respect to the inner shim plate 3a in the non-braking state in the circumferential direction. When braking is performed from this state and the disc brake pad assembly 14 is strongly clamped between the pressing surface (the front end surface of the piston or the inner side surface of the caliper claw) and the side surface of the rotor, the pressing surface and the pad 1 Tends to shift in the circumferential direction. In this state, the outer shim plate 4a pressed by the pressing surface is displaced with respect to the inner shim plate 3a attached to the back side of the pressure plate 2a of the pad 1.

At the time of this displacement, the circumferential dimension of the outer bending raising plate portion 21 on the front side in the displacement direction of the outer shim plate 4a among the both outer bending raising plate portions 21 and 21 is elastically contracted, and the rear outer side is also the same. The circumferential dimension of the bending raising plate portion 21 is elastically expanded. Since the elasticity of the outer bent plates 21 and 21 is kept low by the presence of the through holes 25, the displacement of the outer shim plate 4a with respect to the inner shim plate 3a during braking is smoothly performed. Done. Further, since the positional relationship between the two shim plates 3a and 4a is in a neutral state when not braking, the shim plates 3a, 3a, 4a can be displaced. As a result, it is possible to stabilize the posture of the pad 1 and suppress the occurrence of vibration accompanied by noise, which is called “squeal” during braking.
Also, since the inner and outer bent plates 19 and 21 are provided at both ends of the shim plates 3a and 4a in the circumferential direction, these bent plates 19 and 21 and the support and piston are provided. Furthermore, there is no interference with the caliper. Therefore, each of the bent raising plates 19 and 21 does not adversely affect the operation of the disc brake and the pad replacement work.

  When carrying out the present invention (this example and second to third examples of embodiments described later), it is preferable that each of the outer locking pieces 20a be a part of the inner and outer peripheral edges of the pressure plate 2a. , 20b, and 20c are preferably formed as partially arcuate convex curved surfaces 34a and 34b as shown in FIGS. If the outer locking pieces 20a, 20b, 20c and the inner and outer peripheral edges of the pressure plate 2a are brought into contact with the convex curved surfaces 34a, 34b, the outer shim plate 4a with respect to the pressure plate 2a will be described. The circumferential displacement can be smoothly performed. That is, since the circumferential edge of each outer locking piece 20a, 20b, 20c is reliably separated from the inner and outer peripheral edges of the pressure plate 2a, the peripheral edge and the inner and outer peripheral edges are strong. No more rubbing. Further, a good oil film is provided at the contact portion between the circumferential edge of each outer locking piece 20a, 20b, 20c and both inner and outer peripheral edges of the pressure plate 2a at the center of each convex curved surface 34a, 34b. Can be formed. Accordingly, the circumferential displacement of the outer shim plate 4a with respect to the pressure plate 2a can be performed smoothly.

[Second Example of Embodiment]
FIGS. 11 to 17 show a second example of the embodiment of the invention corresponding to claims 5 to 7. The disc brake pad assembly 14a of this example includes a pad 1, an inner shim plate 3b, and an outer shim plate 4b. As in the case of the conventional structure shown in FIGS. 23 to 25 described above, the locking recess 10 and the pair of step portions 11 are provided on the outer diameter side and the inner diameter side of the pressure plate 2 constituting the pad 1. 11 and 11 respectively. Then, the inner shim plate 3b is arranged on the back side of the pressure plate 2, as in the conventional structure, and a plurality of inner locking pieces 8a, 8b, 8c, the locking recess 10 and both stepped portions 11, 11 It is mounted in a state in which the displacement in the circumferential direction and the radial direction is limited by the engagement. The outer shim plate 4b is supported on the back side of the inner shim plate 3a so as to be able to be slightly displaced in the circumferential direction and the radial direction, and to return to the neutral position without any external force acting. Yes.

  For this reason, in the case of this example, a pair of inner bent plates 19a, 19a provided at both circumferential edges of the inner body portion 7b of the inner shim plate 3b, and an outer body portion of the outer shim plate 4b. A pair of outer bent plates 21a, 21a provided at both circumferential edges of 12b are elastically engaged in the circumferential direction and the radial direction. Among these, the inner bent plate portions 19a and 19a are each formed by folding an intermediate portion into a U shape, and include an inner base portion 26, an inner curved portion 27, and an inner elastic pressing portion 28. Of these, the inner base portion 26 is a base end edge portion which is continuous with the circumferential end edge of the inner body portion 7b. The inner base portion 26b is opposite to the pressure plate 2 from both circumferential end edges of the inner body portion 7b. It is bent almost 90 degrees. Further, the inner curved portion 27 is formed by connecting the base end edge to the distal end edge of the inner base portion 26 and is folded back approximately 180 degrees toward the pressure plate 2 side. Further, the inner elastic pressing portion 28 has a base edge continuous with a distal end edge of the inner curved portion 27 and is formed wider than the inner curved portion 27. In addition, a through hole 25a is formed in the central portion in the width direction of the portion extending from the inner base portion 26 to the inner curved portion 27, so that the elasticity of the inner elastic pressing portion 28 in the circumferential direction is appropriately lowered.

  On the other hand, each of the outer bent plate portions 21a and 21a is formed by folding the intermediate portion into a U-shape, and includes an outer base portion 29, an outer curved portion 30, an outer elastic pressing portion 31, and an outer diameter. A side elastic pressing portion 32 and an inner diameter side elastic pressing portion 33 are provided. Of these, the outer base 29 has a base edge continuous with the circumferential edge of the outer body portion 12b, and is opposite to the pressure plate 2 from both circumferential edges of the outer body portion 12b. It is bent almost 90 degrees. The outer curved portion 30 has a base edge continuous with a distal end edge of the outer base 29 and is folded back approximately 180 degrees toward the pressure plate 2 side. The outer elastic pressing portion 31 has a base edge continuous with a distal end edge of the outer curved portion 30 and is formed to have substantially the same width as the outer curved portion 30. With respect to the outer bent plate portions 21a and 21a, the width of the outer elastic pressing portion 31 is kept small, and the elasticity of the outer elastic pressing portion 31 in the circumferential direction is appropriately lowered. Further, the elastic pressing portions 32 and 33 on the outer diameter side and the inner diameter side respectively extend from both outer diameter side and inner diameter side edges of the outer curved portion 30 to both sides in the radial direction. Each of the outer diameter side and inner diameter side elastic pressing portions 32 and 33 is substantially L-shaped and protrudes in the radial direction and then bends toward the pressure plate 2. Further, both the outer diameter side and inner diameter side elastic pressing portions 32 and 33 provided on the same outer bent and raised plate portion 21a are opposed to each other in the radial direction, and have elasticity in a direction in which the respective front end portions are brought close to each other. .

  The outer shim plate 4b as described above is assembled to the back side of the pressure plate 2 via the inner shim plate 3b to form the disc brake pad assembly 14a. The structure for attaching and supporting the inner shim plate 3b to the pressure plate 2 is the same as the conventional structure shown in FIGS. In particular, in the case of this example, unlike the case of this conventional structure and the first example of the above-described embodiment, the outer shim plate 4b is bent and raised on the back side of the inner shim plate 3b. The plate portions 19a and 19a are supported on the basis of the engagement between the outer side bent and raised plate portions 21a and 21a. A structure for directly locking the outer shim plate 4b to the pressure plate 2 is not provided. However, although illustration is omitted, outer locking pieces bent toward the pressure plate 2 are provided on both inner and outer peripheral edges of the outer shim plate 4b, and the tip ends of these outer locking pieces are attached to the pressure plate 2. It can also be elastically brought into contact with the inner and outer peripheral edges.

  In the case of the illustrated example, without providing the outer locking piece as described above, the both inner bent plates 19a, 19a and the both outer bent plates 21a, 21a are engaged, The outer shim plate 4b is assembled to the inner shim plate 3b so as to allow a slight relative displacement in the circumferential direction and the radial direction, and to return to the neutral position when no external force is applied. That is, the outer elastic pressing portions 31 of the outer bent plates 21a and 21a are formed on the outer circumferential surfaces (side surfaces opposite to each other) of the inner elastic pressing portions 28 and 28 of the inner bent plates 19a and 19a. , 31 are brought into elastic contact with the inner side surfaces in the circumferential direction (side surfaces facing each other). Thus, the outer shim plate 4b is supported relative to the inner shim plate 3b so as to be capable of relative displacement in the circumferential direction. At the same time, the outer diameter side elastic pressing portions 32, 32 are disposed at the outer diameter side edges of the inner elastic pressing portions 28, 28, and the inner diameter side elastic pressing portions 33, 33 are disposed at the inner diameter side end portions. The parts are brought into elastic contact with each other. Thus, the outer shim plate 4b is supported with respect to the inner shim plate 3b so as to be capable of relative displacement in the radial direction. In the case of this example, when both the shim plates 4b and 3b are relatively displaced in the circumferential direction, both the inner and outer elastic pressing portions 28 and 31 are elastically deformed. And the force required for relative displacement can be reduced.

As described above, when the outer shim plate 4b is supported by the inner shim plate 3b, the outer shim plates 3b and 4b are not subjected to external force, and the shim plates 3b and 4b in the circumferential direction and the radial direction are not affected. The positional relationship returns to the neutral state. Accordingly, the outer shim plate 4b among these is in a non-braking state and can be displaced in any direction with respect to the circumferential direction and the radial direction. When the disc brake pad assembly 14a formed by assembling the outer shim plate 4b and the inner shim plate 3b to the pad 1 is assembled to the disc brake and braking is performed by the disc brake, the above-described embodiment is performed. As in the first example of the embodiment, the outer shim plate 4 b is displaced reliably and smoothly with respect to the pad 1. In particular, in the case of this example, the displacement of the outer shim plate 4b can be smoothly performed not only in the circumferential direction but also in the radial direction. As a result, it is possible to stabilize the posture of the pad 1 and suppress the occurrence of vibration accompanied by noise, which is called “squeal” during braking.
The structure of the present example is an outer locking instead of making the shape and combination state of the inner bent plate portions 19a, 19a and the outer bent plate portions 21a, 21a different from the first example of the embodiment described above. The piece is omitted, and as a result, the smoothness of the displacement in the radial direction of the outer shim plate 4b is improved. Since the configuration and operation of the other parts are basically the same as those in the first example of the above-described embodiment, a duplicate description is omitted.

[Third example of embodiment]
18 to 22 show a third example of the embodiment of the invention corresponding to claims 8 and 9. In the case of this example, the inner bent plate portions 19b, 19b are bent from the inner main body portion 7c to the opposite side to the pressure plate 2a at the circumferential end portions of the inner main body portion 7c of the inner shim plate 3c. Forming. The inner bent plate portions 19b, 19b are formed in a substantially U shape by folding back their intermediate portions, and are parallel to each other.

  Further, both end portions in the circumferential direction of the outer body portion 12c of the outer shim plate 4c are respectively provided at both end portions in the circumferential direction of the outer shim plate 4c, which are made of a metal plate having corrosion resistance and elasticity, such as a spring made of stainless steel. Are provided with outer bent plate portions 21b and 21b bent to the opposite side to the pressure plate 2a. The outer bent plate portions 21b and 21b are formed by bending the base portion of the L-shaped extending portion extending from both circumferential edges of the outer body portion 12c toward the side opposite to the pressure plate 2a. . Such both outer side bending raising plate portions 21b and 21b extend radially inward from the base end portion present at the radially outer end portion, and the tip edges of the portions closer to the tip end are either It is set as the circumferential direction elastic press board part 35 which is a free end which does not continue with this part. Further, of the circumferential end edges of the outer body portion 12c, the radial position is the radially inner portion of the base end portions of the outer bent plate portions 21b and 21b, and the radial position is the circumferential elastic pressing plate portion 35. Cutout portions 36 and 36 are formed in the portions that are aligned with each other.

  These notches 36, 36 are formed in portions that are aligned with the inner bent plates 19b, 19b, and the inner body portion 7c of the inner shim plate 3c is superimposed on the back surface of the pressure plate 2a. Further, in a state where the outer main body portion 12c of the outer shim plate 4c is superimposed on the outer surface side of the inner main body portion 7c, the inner bent plate portions 19b, 19b are present in the inner portions of the notch portions 36, 36. To do. Further, the circumferential elastic pressing plates 35, 35 constituting the both outer bent plates 21b, 21b are in contact with the outer circumferential surfaces (surfaces opposite to each other) of the both inner bent plates 19b, 19b. Touch. As a result, both the circumferential elastic pressing plates 35, 35 elastically press the inner bending plate portions 19b, 19b in a direction approaching each other. The outer shim plate 4c is displaceable in the circumferential direction with respect to the inner shim plate 3c, and both the shim plates 4c, 3c in the circumferential direction are not applied to the shim plates 4c, 3c. Are combined in a state of returning to the neutral position based on the elasticity of the circumferential elastic pressing plates 35, 35.

  Further, in the case of this example, even if the positional relationship of the shim plates 4c and 3c in the radial direction is established, the shim plates 4c and 3c are returned to the neutral position without any external force. For this reason, in the case of this example, a pair of inner shim plates 3c near the inner diameter of the inner main body portion 7c are separated from each other at two positions separated in the circumferential direction (both ends in the circumferential direction of the inner circumferential edge). Inner peripheral edge side inner bending raising plate portions 37, 37 are provided in a state where the inner circumferential edge side bending raising plate portions 37, 37 are bent and raised from both positions to the side opposite to the pressure plate 2a. The inner rim side inner bending raising plate portions 37, 37 are formed in a substantially U shape by folding back their intermediate portions.

  In addition, two sets of radial elastic pressing units 38, 38 are provided at two positions spaced in the circumferential direction of the inner peripheral edge of the outer body portion 12c of the outer shim plate 4c. These two radial elastic pressing units 38, 38 are constituted by a pair of inner peripheral edge side outward bending raising plate portions 39a, 39b, which are separated from each other in the radial direction, for each of these two radial elastic pressing units 38, 38. Yes. Further, each of these inner peripheral side outer bending raising plate portions 39a, 39b is extended radially inward from a position separated in the circumferential direction in the inner peripheral edge of the outer main body portion 12c, each of which is L-shaped. The extending portion is configured by bending up the side opposite to the pressure plate 2a. Each of the inner peripheral edge side outward bending raising plate portions 39a and 39b is formed with radial elastic pressing plate portions 40a and 40b, which are free ends in which the respective distal end edges are not continuous with any portion. The distal ends of the pair of radial elastic pressing plates 40a, 40b constituting the same radial elastic pressing unit 38, 38 are overlapped in the radial direction and impart elastic force in the direction in which they approach each other without external force acting. Has been.

In the structure of this example, the inner body portion 7c of the inner shim plate 3c is overlaid on the back surface of the pressure plate 2a, and the outer body portion 12c of the outer shim plate 4c is overlaid on the outer surface side of the inner body portion 7c. In this state, as described above, both the inner bent plates 19b, 19b are engaged with the circumferential elastic pressing plates 35, 35. At the same time, a pair of radial elastic pressing plates 40a, 40b constituting the both radial elastic pressing units 38, 38 elastically cause the inner peripheral edge side inner bending raising plate portions 37, 37 to elastically move from both radial sides. Press. In this state, the outer shim plate 4c is displaceable in the radial direction with respect to the inner shim plate 3c, and both shim plates 4c in the radial direction are not applied to the shim plates 4c and 3c. 3c is combined in a state of returning to the neutral position based on the elasticity of each radial elastic pressing plate portion 40a, 40b constituting the both radial elastic pressing units 38, 38.
Since the configuration and operation of the other parts are basically the same as those in the first example of the above-described embodiment, a duplicate description is omitted.

  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.

DESCRIPTION OF SYMBOLS 1 Pad 2, 2a Pressure plate 3, 3a, 3b, 3c Inner shim board 4, 4a, 4b, 4c Outer shim board 5, 5a Combination shim board 6 Lining 7, 7a, 7b, 7c Inner body part 8a, 8b, 8c Inner locking piece 9 Through hole 10 Locking recess 11 Stepped portion 12, 12a, 12b, 12c Outer body portion 13a, 13b, 13c Outer locking piece 14, 14a Disc brake pad assembly 15 Outer diameter side central locking recess 16 Locking convex part 17 Inner diameter side central locking concave part 18a, 18b, 18c Inner locking piece 19, 19a, 19b Inner bending raising plate part 20a, 20b, 20c Outer locking piece 21, 21a, 21b Outer bending raising plate part 22 Base 23 Curved portion 24 Elastic pressing portion 25, 25a Through hole 26 Inner base 27 Inner curved portion 28 Inner elastic pressed portion 29 Outer base 30 Outer curved portion 3 Outer elastic pressing portion 32 Outer diameter side elastic pressing portion 33 Inner diameter side elastic pressing portions 34a and 34b Convex curved surface 35 Circumferential elastic pressing plate portion 36 Notch portion 37 Inner diameter side inner bending raising plate portion 38 Radial elastic pressing units 39a and 39b Inner peripheral edge side outer bent plate part 40a, 40b Radial direction elastic pressing plate part

Claims (9)

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,
A pair of inner bent and raised plate portions provided in a state bent and raised from both circumferential edges of the inner body portion of the inner shim plate to the opposite side of the pressure plate;
A pair of outer bent and raised plate portions bent and raised from opposite circumferential edges of the outer body portion of the outer shim plate to the opposite side of the pressure plate;
Each of the outer bent plate parts is formed by folding the middle part into a U-shape, a base part in which each base end edge part is continued to the circumferential end edge of the outer body part, and a leading edge of the base part. A curved portion in which the base end edge is made continuous, and an elastic pressing portion in which the base end edge is made continuous with the distal end edge of the curved portion,
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 outer circumferential surface of the elastic pressing portion of the outer bent plate portions And elastically abutting the inner side surfaces of the both inner side bent raised plate parts,
With the outer shim plate being displaceable in the circumferential direction with respect to the inner shim plate and with no external force acting on both the shim plates, the positional relationship between the two shim plates in the circumferential direction is caused by the bending of both outer shims. A disc brake pad assembly characterized by being combined in a state of returning to a neutral position based on the elasticity of the plate portion.   By engaging a radially bent plate portion bent toward both sides of the pressure plate from both radial edges of the shim plates with both inner and outer peripheral edge portions of the pressure plate, the both shim plates with respect to the pressure plate are The disc brake pad assembly according to claim 1, wherein positioning in the radial direction is intended.   In order to elastically deform the elastic pressing portions of the outer bent plate portions by forming a through hole at the center in the width direction of at least the portion including the curved portion at the middle portion of the outer bent plate portions. The disk brake pad assembly according to any one of claims 1 and 2, wherein a required force is reduced.   Bending the both inner bent and raised plate portions with respect to the inner main body portion over 90 degrees makes the angle formed by the inner main body portion and both inner bent and raised plate portions an acute angle and the both outer sides. Of the elastic pressing portions of the bent plate portions, the portions that are in contact with the inner circumferential surfaces of the inner bent plate portions are protruded outward in the circumferential direction from the front edge of the curved portion, and the outer bent portions are raised. Any one of Claims 1-3 which aims at prevention of isolation | separation of the said both shim boards based on the engagement with the elastic direction part of the board part, and the circumferential direction inner surface of the said both inner side bending raising board part. Disc brake pad assembly as described in the above section. 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,
A pair of inner bent and raised plate portions provided in a state bent and raised from both circumferential edges of the inner body portion of the inner shim plate to the opposite side of the pressure plate;
A pair of outer bent and raised plate portions bent and raised from opposite circumferential edges of the outer body portion of the outer shim plate to the opposite side of the pressure plate;
Each of the inner bent plate portions is formed by folding an intermediate portion into a U-shape, and an inner base portion in which each base end edge portion is connected to a circumferential end edge of the inner main body portion, and the inner base portion. An inner curved portion in which the base edge is made continuous with the distal edge, and an inner elastic pressing portion in which the base edge is made continuous with the distal edge of the inner curved portion,
Each of the outer bent plate portions is formed by folding an intermediate portion into a U shape, and an outer base portion in which each base end edge portion is connected to a circumferential end edge of the outer body portion, and the outer base portion. An outer curved portion in which the base edge is made continuous with the distal edge, and an outer elastic pressing portion in which the base edge is made continuous with the distal edge of the outer curved portion,
The inner body portion is overlapped on the back surface of the pressure plate, and the outer body portion is overlapped on the outer surface side of the inner body portion. By elastically abutting the side surface and the circumferential outer surface of both inner elastic pressing portions,
With the outer shim plate being displaceable in the circumferential direction with respect to the inner shim plate and with no external force acting on both the shim plates, the positional relationship between the two shim plates in the circumferential direction is caused by the bending of both outer shims. A disc brake pad assembly characterized by being combined in a state of returning to a neutral position based on the elasticity of the plate portion.   In order to elastically deform the inner elastic pressing portions of the inner bent plate portions by forming a through hole in the middle portion of the width direction of at least the portion including the inner curved portion at the intermediate portion of the inner bent plate portions. 6. The disc brake pad assembly according to claim 5, wherein a force required for the disc brake is reduced.   Extending in the radial direction from both ends in the radial direction of the outer curved portion of the outer bent plate portions and bending the tip portion toward the pressure plate to form an elastic pressing plate portion on the outer diameter side and inner diameter side. By causing the distal end portion of the elastic pressing plate portion to elastically contact the both end edges in the radial direction of the inner elastic pressing portion, the positional relationship between the two shim plates with respect to the radial direction is determined by the outer diameter side and the inner diameter side. The disc brake pad assembly according to any one of claims 5 to 6, which is combined in a state of returning to the neutral position based on the elasticity of the elastic pressing plate portion. 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,
A pair of inner bent and raised plate portions provided in a state bent and raised from the circumferentially opposite ends of the inner shim plate to the opposite side of the pressure plate;
A pair of outer bent and raised plate portions bent and raised from opposite circumferential edges of the outer body portion of the outer shim plate to the opposite side of the pressure plate;
These outer side bent and raised plate parts are formed by bending the base part of the extending part extending from both circumferential edges of the outer body part toward the side opposite to the pressure plate, and the respective parts closer to the tip are respectively The tip edge of the circumferentially elastic pressing plate is a free end that is not continuous with any part,
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, By elastically pressing the inner bent raised plate portions in the direction approaching each other by the circumferential elastic pressing plate portion to be configured,
The outer shim plate is displaceable in the circumferential direction with respect to the inner shim plate, and in the state where no external force acts on both the shim plates, the positional relationship between the two shim plates with respect to the circumferential direction is the elastic property in both circumferential directions. A disc brake pad assembly characterized by being combined in a state of returning to a neutral position based on the elasticity of the pressing plate portion. A pair of inner-side inner bent and raised plate portions provided in a state bent and raised to the opposite side of the pressure plate from two positions spaced in the circumferential direction of the inner-side portion of the inner shim plate;
A pair of inner peripheral side outer bent raised plates that are bent and raised from two circumferentially spaced positions on the inner peripheral edge of the outer shim plate to the opposite side of the pressure plate, each separated radially. Comprising two sets of radial elastic pressing units constituted by a portion,
Each of the pair of inner peripheral edge side outward bending raising plate portions constituting these both radial elastic pressing units has a base portion of an extending portion extending from a circumferentially spaced portion of the inner peripheral edge of the outer body portion. It is formed based on bending toward the opposite side of the pressure plate, and each distal end portion is a radial elastic pressing plate portion that is a free end where each distal end edge is not continuous with any portion, The tip portions of a pair of radial elastic pressing plate portions constituting the same radial elastic pressing unit are superimposed in the radial direction,
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 dual radial elastic pressing unit is By elastically pressing both inner peripheral edge side inner bending raising plate portions from both sides in the radial direction by a pair of radial elastic pressing plate portions constituting
The outer shim plate is displaceable in the radial direction with respect to the inner shim plate, and in the state where no external force acts on both the shim plates, the positional relationship between the two shim plates with respect to the radial direction is the bi-directional elasticity. The disc brake pad assembly according to claim 8, wherein the disc brake pad assembly is combined in a state of returning to the neutral position based on the elasticity of the radial elastic pressing plate portion constituting the pressing unit.

Images