Friction pad assembly for disc brake

Abstract

The present invention provides a friction pad assembly for a disc brake, which can realize a rotation-stopping structure of the lining assembly or a structure for swingably supporting the lining assembly with fewer parts and at a low cost. The friction pad assembly (100) for a disc brake is swingably supported by a guide plate (13) for receiving a braking torque. The lining assembly (15) has a friction member (29) pressed against a disc rotor and a back plate portion (17) fixed to the back of the friction member, and the back plate portion is provided with a plate fitting portion (31) swingably fitted into a guide hole portion (27) of the guide plate. The plate fitting portion is fitted into the guide hole portion, and the braking torque when the friction member is pressed against the disc rotor is transmitted from the plate fitting portion to the guide plate. A cut-out piece (37) for limiting the rotation of the lining assembly is integrally formed on a torque receiving plate (11) fixed to the guide plate.

Description

Technical Field

[0001] The present invention relates to a friction pad assembly for a disc brake. Background Art

[0002] For example, a disc brake device for a railway vehicle comprises: a disc rotor fixed to an axle; a disc brake friction pad assembly, in which a lining assembly is mounted on the disc rotor side surface of a torque receiving plate arranged opposite to the disc rotor; and a brake caliper fixed to a vehicle body frame and having a built-in actuator for driving the torque receiving plate forward and backward toward the disc rotor. The disc brake device generates a braking force by sliding friction when the lining assembly is pressed against the disc rotor when the torque receiving plate is advanced to the disc rotor side.

[0003] Furthermore, in the above-mentioned disc brake device, when the lining assembly rotates accidentally due to contact with the disc rotor, a transmission loss of the braking torque or a brake noise is generated, and therefore a rotation preventing mechanism (rotation stopping structure) for limiting the rotation of the lining assembly is required. For example, the friction pad assembly for a disc brake disclosed in Patent Document 1 fixes a rotation limiting plate between the inner surface of a guide plate that swingably supports the lining assembly and the inner surface of a back plate (torque receiving plate), and the rotation limiting plate is engaged with the anti-detachment flange of the back plate, thereby constituting a rotation preventing mechanism for limiting the rotation of the lining assembly.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2014-211196 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, when the rotation restricting plate is fixed between the inner surface of the guide plate and the inner surface of the torque receiving plate as in the rotation prevention mechanism disclosed in Patent Document 1, the number of parts and the weight increase, and the manufacturing cost also increases.

[0009] Furthermore, in order to swingably support the lining assembly, when a contact curved surface portion that contacts the rear plate is formed to protrude from the back plate portion or the mounting plate, cutting is required, which increases processing costs, or the number of parts increases, which increases manufacturing costs.

[0010] The present invention has been made in view of the above situation, and an object of the present invention is to provide a friction pad assembly for a disc brake, which can realize a rotation-stopping structure of the lining assembly or a structure for swingably supporting the lining assembly at a low cost with a small number of parts.

[0011] Solutions for solving problems

[0012] The above-mentioned object of the present invention is achieved by the following configuration.

[0013] The lining assembly is characterized in that the lining assembly comprises: a friction member that is pressed against the disc rotor during braking; and a back plate portion that is fixedly connected to the back side of the friction member, and the lining assembly is provided on the back plate portion with: a plate fitting portion that is freely fitted in a guide hole portion provided in the guide plate, the plate fitting portion is fitted in the guide hole portion, and the braking torque applied when the friction member is pressed against the disc rotor is transmitted from the plate fitting portion to the guide plate, and a rotation-stopping portion that limits the rotation of the lining assembly is integrally formed on a torque receiving plate that is fixedly connected to the guide plate.

[0014] According to the friction pad assembly for a disc brake of the configuration of (1), a rotation-stopping portion for limiting the rotation of the lining assembly is integrally formed on the torque receiving plate. The rotation-stopping portion integrally formed on the torque receiving plate engages with the lining assembly to limit the rotation of the lining assembly. The rotation-stopping portion is directly disposed between the lining assembly and the torque receiving plate, thereby making the rotation-stopping structure of the lining assembly a simple structure with a small number of parts.

[0015] (2) The friction pad assembly for a disc brake according to the above (1), wherein a protrusion that swingably supports the lining assembly is provided on the torque receiving plate.

[0016] According to the friction pad assembly for a disc brake of the configuration (2) above, the convex portion arranged on the torque receiving plate abuts against the back plate portion of the lining assembly in order to support the lining assembly in a swingable manner, so that the lining assembly can be swung freely. In addition, according to this configuration example, even if there are a plurality of lining assemblies, the convex portions can be stamped out in batches on the torque receiving plate at positions corresponding to the respective lining assemblies. Thus, a structure for supporting the lining assembly in a swingable manner can be manufactured inexpensively with a simple structure.

[0017] (3) The friction pad assembly for a disc brake according to the above (1), wherein a convex portion for swingably supporting the lining assembly is arranged on the back plate portion.

[0018] According to the friction pad assembly for a disc brake having the configuration of (3) above, the convex portion arranged on the back plate portion in order to swingably support the lining assembly abuts against the torque receiving plate, and the lining assembly can be swingably supported.

[0019] (4) The friction pad assembly for a disc brake according to (2) or (3), characterized in that a damping layer is provided between the back plate portion and the torque receiving plate.

[0020] According to the friction pad assembly for a disc brake having the structure of (4), the vibration propagating between the lining assembly and the torque receiving plate is attenuated by the attenuation layer. The attenuation layer helps to reduce the noise generated by the contact between the torque receiving plate and the back plate portion. As a result, the vibration generated during a braking process is attenuated, and the squealing noise (so-called brake noise) is suppressed.

[0021] (5) The friction pad assembly for a disc brake according to any one of (1) to (4) above, wherein the rotation restriction portion is a cut-and-raised piece formed on the torque receiving plate so as to engage with a locking recess formed on the back plate portion.

[0022] According to the friction pad assembly for a disc brake constructed as described above (5), by forming a cut-out piece on the torque receiving plate, the rotation limiting portion can be simply formed integrally on the torque receiving plate through a series of stamping operations such as punching and bending, without using other components.

[0023] (6) The friction pad assembly for a disc brake according to (5) above is characterized in that a member covering at least an opening formed in the torque receiving plate by the cut and raised pieces is provided between the torque receiving plate and the back plate portion.

[0024] According to the friction pad assembly for a disc brake of the configuration (6), the opening after the cut and raised piece is cut is covered by a member provided between the torque receiving plate and the back plate portion. The member can prevent foreign matter from entering between the torque receiving plate and the back plate portion through the opening from the outside.

[0025] (7) The friction pad assembly for a disc brake according to any one of (1) to (3) above, wherein the rotation restriction portion is an opening formed in the torque receiving plate so as to engage with a protrusion formed on the back plate portion.

[0026] According to the friction pad assembly for a disc brake of the configuration (7), the protrusion is formed on the back plate portion, and the opening engaged with the protrusion is formed on the torque receiving plate. That is, as in the case where the cut-and-raised piece is provided on the torque receiving plate, the lining assembly can be stopped by a simple structure using only the back plate portion and the torque receiving plate without using other components. In addition, according to this configuration example, since the processing of the torque receiving plate is only the punching operation for forming the opening, the processing of the torque receiving plate becomes easier than in the case where the cut-and-raised piece is formed.

[0027] (8) A friction pad assembly for a disc brake, in which at least one lining assembly is swingably supported on a guide plate that receives a braking torque, and the lining assembly is pressed against a disc rotor, characterized in that the lining assembly comprises: a friction member that is pressed against the disc rotor during braking; and a back plate portion that is fixedly connected to the back side of the friction member, and the lining assembly is provided on the back plate portion with: a plate fitting portion that is swingably fitted into a guide hole portion provided in the guide plate, the plate fitting portion being inserted and attached to the guide hole portion to transmit the braking torque applied when the friction member is pressed against the disc rotor from the plate fitting portion to the guide plate, and a convex portion that swingably supports the lining assembly is arranged on a torque receiving plate that is fixedly connected to the guide plate.

[0028] According to the friction pad assembly for a disc brake of the configuration (8) above, the convex portion arranged on the torque receiving plate abuts against the back plate portion of the lining assembly in order to support the lining assembly in a swingable manner, so that the lining assembly can be swung freely. In addition, according to this configuration example, even if there are a plurality of lining assemblies, the convex portions can be stamped out in batches on the torque receiving plate at positions corresponding to the respective lining assemblies. Thus, a structure for supporting the lining assembly in a swingable manner can be manufactured inexpensively with a simple structure.

[0029] (9) A friction pad assembly for a disc brake according to any one of (5) to (7) above, characterized in that the opening formed in the torque receiving plate is covered by the brake pad assembly portion when the plate is attached to the brake pad assembly portion of a caliper on which the friction pad assembly for a disc brake is assembled.

[0030] According to the friction pad assembly for a disc brake of the configuration of (9), the torque receiving plate is attached to the caliper in such a manner that the back side (the side opposite to the side facing the back plate portion) is covered by the brake pad mounting portion. Therefore, for example, the opening formed after the cut-out piece is formed in the torque receiving plate, and the opening formed in such a manner as to engage with the protrusion formed on the back plate portion is covered by the brake pad mounting portion. As a result, foreign matter can be prevented from entering between the back plate portion and the torque receiving plate through the opening from the outside.

[0031] (10) The friction pad assembly for a disc brake according to (9) above is characterized in that the opening periphery of the opening formed in the torque receiving plate is in close contact with the brake pad mounting portion of the caliper to which the friction pad assembly for a disc brake is mounted.

[0032] According to the friction pad assembly for a disc brake of the configuration (10) above, the torque receiving plate is attached to the caliper in such a manner that the opening periphery of the opening on the back side (the side opposite to the side facing the back plate portion) is in close contact with the brake pad mounting portion. Therefore, for example, the opening formed by forming a cut-out piece on the torque receiving plate and the opening formed by engaging with the protrusion formed on the back plate portion are blocked by the brake pad mounting portion. As a result, foreign matter can be reliably prevented from entering between the back plate portion and the torque receiving plate through the opening from the outside.

[0033] Effects of the Invention

[0034] According to the friction pad assembly for a disc brake of the present invention, a rotation-stopping structure of the lining assembly or a structure for swingably supporting the lining assembly can be realized at a low cost with a small number of parts.

[0035] The present invention has been briefly described above, but the details of the present invention can be further clarified by reading the specific embodiments (hereinafter referred to as "embodiments") described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view of the friction pad assembly for disc brakes according to the first embodiment of the present invention.

[0037] Figure 2 (a) Yes Figure 1 Right side view, Figure 2 (b) Yes Figure 1 The rear view of Figure 2 (c) is the BB cross-section of (b).

[0038] Figure 3 yes Figure 1 AA cross-section diagram.

[0039] Figure 4 yes Figure 1 An exploded perspective view of a friction pad assembly for a disc brake is shown.

[0040] Figure 5 It is installed on the brake pad assembly part of the caliper. Figure 1 A cross-sectional view of a friction pad assembly for a disc brake is shown.

[0041] Figure 6 yes Figure 1 1 is a rear view of a modified example of the friction pad assembly for a disc brake shown.

[0042] Figure 7 yes Figure 6 A cross-sectional view of a modified example shown.

[0043] Figure 8 yes Figure 6 An exploded perspective view of a modified example shown.

[0044] Fig. 9 It is a cross-sectional view of a friction pad assembly for a disc brake according to a second embodiment of the present invention.

[0045] Fig.10 yes Fig. 9 An exploded perspective view of a friction pad assembly for a disc brake is shown.

[0046] Fig.11 It is a cross-sectional view of a friction pad assembly for a disc brake according to a third embodiment of the present invention.

[0047] Fig.12 It is a cross-sectional view of a friction pad assembly for a disc brake according to a fourth embodiment of the present invention.

[0048] Fig.13 yes Fig.12 sectional view of a modified example of the friction pad assembly for a disc brake shown in FIG.

[0049] Fig.14 It is a cross-sectional view of a friction pad assembly for a disc brake according to a fifth embodiment of the present invention. DETAILED DESCRIPTION

[0050] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0051] The friction pad assembly for a disc brake of this embodiment (hereinafter, simply referred to as "friction pad assembly") is used in a disc brake device for a railway vehicle, and is arranged to face a disc rotor on an axle, and is driven forward and backward toward the disc rotor by an actuator built into a brake caliper fixed to a vehicle body frame. Of course, the friction pad assembly for a disc brake of the present invention is not limited to a disc brake device for a railway vehicle.

[0052] First embodiment

[0053] Figure 1 is a front view of a friction pad assembly 100 according to a first embodiment of the present invention. Figure 2 (a) Yes Figure 1 Right side view, Figure 2 (b) Yes Figure 1 The rear view of Figure 2 (c) Yes Figure 2 (b) BB cross-section diagram, Figure 3 yes Figure 1 AA section diagram, Figure 4 yes Figure 1 An exploded perspective view of the friction pad assembly 100 is shown.

[0054] The friction pad assembly 100 of the first embodiment comprises: a torque receiving plate 11, which is driven forward and backward toward the disc rotor by a driver not shown in the figure; a guide plate 13, which is connected and fixed to the disc rotor side of the torque receiving plate 11; and at least one (five in the present embodiment) lining assembly 15, which is swingably engaged and supported on the guide plate 13.

[0055] The torque receiving plate 11 is mounted on the guide plate 13 to which the lining assembly 15 is inserted. The torque receiving plate 11 is fixed to the guide plate 13 by rivets 19 with a gap S1 between the torque receiving plate 11 and the back plate portion 17 of the lining assembly 15. The torque receiving plate 11 is formed into a thin disk shape covering the back side of the back plate portion 17 in order to have a gap S1 between the torque receiving plate 11 and the back plate portion 17.

[0056] like Figure 2 as well as Figure 3 As shown, an anchor plate 21 is fixed to the back side 11a of the torque receiving plate 11 by rivets 23. The anchor plate 21 is connected to a pressing seat 25 of a caliper, and the pressing seat 25 of the caliper is connected to an actuator (not shown). Thus, the friction pad assembly 100 can be driven forward and backward toward the disc rotor.

[0057] like Figure 1 As shown, the guide plate 13 is formed with a plurality of (five holes) guide holes 27 at predetermined intervals, and each guide hole 27 is for attaching the lining assembly 15. The guide plate 13 is formed of a flat plate material having a predetermined plate thickness that can withstand the braking torque acting on the lining assembly 15 attached to each guide hole 27 during braking.

[0058] The lining assembly 15 is swingably supported by the guide plate 13 that receives the braking torque and is pressed against the disc rotor. The lining assembly 15 is composed of a friction member 29 formed in a substantially circular plate shape and a back plate portion 17 fixed to the back of the friction member 29. The back plate portion 17 is integrally formed with: a plate fitting portion 31, the outer peripheral surface of which is swingably fitted in a circular guide hole portion 27 formed through the guide plate 13; and a fall-off prevention flange portion 33, the outer diameter of which is larger than the guide hole portion 27.

[0059] The outer diameter of the friction member 29 is set smaller than the inner diameter of the guide hole 27 so that the friction member 29 can be inserted through the guide hole 27. The friction member 29 is pressed against the disc rotor during braking. The plate fitting portion 31 is fitted into the guide hole 27, and the lining assembly 15 transmits the braking torque applied when the friction member 29 is pressed against the disc rotor from the plate fitting portion 31 to the guide plate 13.

[0060] The plate fitting portion 31 is formed into a convex curved surface on the guide hole 27 side so that the lining assembly 15 can smoothly swing due to sliding contact with the guide hole 27. Thus, the plate fitting portion 31 is swingably fitted in the guide hole 27 provided in the guide plate 13.

[0061] An annular spring member 35 is embedded in the plate fitting portion 31. The spring member 35 is formed of an annular leaf spring. The outer diameter of the spring member 35 is set larger than the guide hole portion 27. Each lining assembly 15 is inserted and attached to the guide hole portion 27 from the back side of the guide plate 13. Therefore, the spring member 35 embedded in the plate fitting portion 31 is sandwiched between the guide plate 13 and the anti-detachment flange portion 33.

[0062] The friction pad assembly 100 is a form in which a plurality of lining assemblies 15 are arranged in a plane. In the friction pad assembly 100, the spring member 35 sandwiched between the anti-detachment flange portion 33 of the lining assembly 15 and the guide plate 13 is elastically deformed to absorb the dimensional tolerance in the thickness direction of the lining assembly 15. Therefore, in the friction pad assembly 100, the contact properties of each lining assembly 15 with respect to the disc rotor are prevented from being uneven. Therefore, each lining assembly 15 can maintain stable braking characteristics without being affected by the dimensional tolerance in the thickness direction.

[0063] Furthermore, a rotation restriction portion for restricting the rotation of the lining assembly 15 is integrally formed on the torque receiving plate 11 fixed to the guide plate 13 .

[0064] In the first embodiment, the rotation-stopping portion is formed by a cut-and-raised piece 37. The cut-and-raised piece 37 is formed on the torque receiving plate 11 so as to engage with the locking recess 39 formed on the back plate portion 17. The cut-and-raised piece 37 is formed by punching the torque receiving plate 11 with a U-shaped punch or the like to form a U-shaped slit, as shown in FIG. Figure 4 As shown, the base end of the plate piece surrounded by the U-shaped slit is bent (cut and raised) toward the back plate portion 17 so as to be perpendicular to the torque receiving plate 11 .

[0065] The cut and raised pieces 37 engage with the locking recesses 39 formed in the back plate 17 to restrict the rotation of the lining assembly 15. In the first embodiment, the locking recesses 39 are holes penetrating the back plate 17. It should be noted that the locking recesses 39 are not limited to holes.

[0066] For example, the locking recess 39 may be a recess cut out by a straight line (chord) connecting two points in the circumferential direction of the circular back plate 17. The recess is the locking recess 39 that is recessed radially inward from the outer circumference of the back plate 17. The cut and raised piece 37 can also restrict the rotation of the lining assembly 15 by abutting against the locking recess 39 formed by the recess.

[0067] In the friction pad assembly 100 of the first embodiment, a convex portion 41 is formed on the torque receiving plate 11, which protrudes toward the back plate portion 17. The convex portion 41 can be formed by, for example, stamping. The convex portion 41 supports the lining assembly 15 so that it can swing. The lining assembly 15, in which the center portion of the circular back plate portion 17 is supported by the convex portion 41, is supported so that it can swing freely (pivot freely) around the convex portion 41.

[0068] Figure 5 The brake pad mounting portion 43 is mounted on the pressing seat 25 of the caliper. Figure 1 A cross-sectional view of the friction pad assembly 100 is shown.

[0069] like Figure 5 As shown, the friction pad assembly 100 is mounted on the pressing seat 25 of the caliper. An anchor plate 21 is fixed to the back surface 11a of the torque receiving plate 11 of the friction pad assembly 100 by a rivet 23. The friction pad assembly 100 is assembled in the following manner: the anchor plate 21 is inserted from the groove end into the dovetail groove-shaped fixing groove 45 formed in the brake pad mounting portion 43 (disk rotor side mounting surface of the pressing seat 25) of the caliper.

[0070] The back side 11a of the torque receiving plate 11 of the friction pad assembly 100 is in close contact with the brake pad assembly portion 43 of the pressing seat 25 of the caliper. A plurality of openings 47 are formed on the back side 11a of the torque receiving plate 11. The openings 47 are square openings formed by cutting and raising the cut-and-raised piece 37 at the U-shaped slit punched out to form the cut-and-raised piece 37. It should be noted that the openings 47 have various opening shapes depending on the shape of the cut-and-raised piece 37. In the torque receiving plate 11, the opening peripheries of the openings 47 on the back side 11a are in close contact with the brake pad assembly portion 43, whereby these openings 47 are blocked by the brake pad assembly portion 43. Thus, foreign matter is reliably prevented from entering between the guide plate 13 and the back side of the torque receiving plate 11 through the openings 47.

[0071] Next, the assembly procedure of the friction pad assembly 100 according to the first embodiment will be described.

[0072] When assembling the friction pad assembly 100, first, the friction material 29 is directed toward the front side of the guide plate 13 ( Figure 3 The lining assembly 15 is inserted into the guide hole portion 27 of the guide plate 13 attached to the back side and arranged upward in a manner that the lining assembly 15 protrudes from the left side of the guide plate 13. At this time, the spring member 35 is previously embedded in the plate embedding portion 31 of each lining assembly 15. By inserting the lining assembly 15 into the guide hole portion 27, the spring member 35 is sandwiched between the guide plate 13 and the anti-detachment flange portion 33. The lining assembly 15 inserted and attached to the guide hole portion 27 is in a state where the anti-detachment flange portion 33 abuts against the peripheral edge portion of the guide hole portion 27 via the spring member 35.

[0073] With all the lining assemblies 15 attached to the guide hole portions 27, the torque receiving plate 11 is placed on the guide plate 13. At this time, the anchor plate 21 is previously fixed to the torque receiving plate 11 by the rivets 23. When the torque receiving plate 11 and the guide plate 13 are aligned, the convex portion 41 protruding from the torque receiving plate 11 abuts against the back plate portion 17 of the lining assembly 15. At the same time, the cut-and-raised piece 37 of the torque receiving plate 11 engages with the locking recess 39 of the back plate portion 17. Finally, the outer peripheral portions of the guide plate 13 and the torque receiving plate 11 are clamped and fixed by the rivets 19 that penetrate each other, and the assembly of the friction pad assembly for the disc brake is completed. After the guide plate 13 and the torque receiving plate 11 are fixed by the rivets 19, the friction pad assembly 100 is in a state where the spring member 35 is deformed by a predetermined preload and is clamped between the guide plate 13 and the anti-detachment flange portion 33.

[0074] Next, the operation of the above-mentioned configuration will be described.

[0075] In the friction pad assembly 100 of the first embodiment, the cut-and-raised piece 37 as the anti-rotation restricting portion for restricting the rotation of the lining assembly 15 is formed integrally with the torque receiving plate 11. The cut-and-raised piece 37 formed integrally with the torque receiving plate 11 engages with the locking recess 39 of the lining assembly 15 to restrict the rotation of the lining assembly 15. In this way, the cut-and-raised piece 37 as the anti-rotation restricting portion is directly arranged between the lining assembly 15 and the torque receiving plate 11, thereby making the anti-rotation structure of the lining assembly 15 a simple structure with a small number of parts.

[0076] Furthermore, in the friction pad assembly 100 of the first embodiment, the convex portion 41 disposed on the torque receiving plate 11 contacts the back plate portion 17 of the lining assembly 15 in order to swingably support the lining assembly 15, thereby enabling the lining assembly 15 to swing freely.

[0077] In this embodiment, even if there are a plurality of lining assemblies 15, the convex portions 41 can be stamped out in batches on the torque receiving plate 11 at positions corresponding to the lining assemblies 15. Thus, a structure for swingably supporting the lining assemblies 15 can be manufactured inexpensively with a simple structure.

[0078] Furthermore, in the friction pad assembly 100 of the first embodiment, after the torque receiving plate 11 is punched out by a punch and a U-shaped slit is formed, the plate piece surrounded by the U-shaped slit is bent at the base end connected to the torque receiving plate 11, thereby forming the cut-and-raised piece 37. Thus, the rotation-stopping portion can be formed integrally with the torque receiving plate 11 simply by a series of punching and bending operations without using other components.

[0079] Furthermore, in the friction pad assembly 100 of the first embodiment, the torque receiving plate 11 is attached to the pressing seat 25 of the caliper in such a manner that the back surface (the surface opposite to the surface facing the back plate portion 17) 11a thereof is in close contact with the brake pad mounting portion 43. Therefore, the opening 47, which is the opening after the cut-and-raised piece 37 is formed in the torque receiving plate 11, is blocked by the brake pad mounting portion 43. Thus, foreign matter can be prevented from entering between the torque receiving plate 11 and the back plate portion 17 through the opening 47 from the outside.

[0080] Figure 6 yes Figure 1 FIG. 1 is a rear view of a friction pad assembly 100A which is a modified example of the friction pad assembly 100 shown in FIG. Figure 7 yes Figure 6 A cross-sectional view of a modified example shown in FIG. Figure 8 yes Figure 6 An exploded perspective view of a modified example shown.

[0081] like Figure 8 As shown, in the friction pad assembly 100A of this modification, a sealing plug 61 as a member covering at least the opening 47 is fitted into the opening 47 as an opening formed in the torque receiving plate 11 by the cut and raised piece 37 .

[0082] The sealing plug 61 is formed of, for example, a synthetic resin material or metal. A flange portion 63 is formed on the outer periphery of the sealing plug 61. The sealing plug 61 is formed from the inner side ( Figure 8 The sealing plug 61 is inserted into the opening 47, whereby the flange portion 63 becomes a stopper and is fitted into the opening 47. The sealing plug 61 may also include a locking claw (not shown) that is locked to the opening edge of the opening 47.

[0083] According to the friction pad assembly 100A, the sealing plug 61 can prevent foreign matter from entering between the torque receiving plate 11 and the back plate portion 17 through the opening 47 from the outside.

[0084] Second embodiment

[0085] Fig. 9 is a cross-sectional view of a friction pad assembly 200 according to a second embodiment of the present invention. Fig.10 yes Fig. 9 FIG. 2 is an exploded perspective view of the friction pad assembly 200 shown in FIG. Figure 1 to Figure 5 The same components as shown are given the same reference numerals and repeated descriptions are omitted.

[0086] The friction pad assembly 200 of the second embodiment is provided with a convex portion 50 for swingably supporting the lining assembly 15 on the back plate portion 49. Fig.10As shown, the torque receiving plate 51 of the friction pad assembly 200 is not formed with Figure 4 The convex portion 41 is shown provided on the torque receiving plate 11 .

[0087] In addition, the friction pad assembly 200 of the second embodiment is provided with a damping layer 53 between the back plate portion 49 and the torque receiving plate 51. The damping layer 53 is formed with a uniform thickness. Fig.10 As shown, the attenuation layer 53 is formed along the peripheral wall on the inner surface of the torque receiving plate 51, thereby having a shape substantially similar to the torque receiving plate 51. A plurality of avoidance holes 55 for avoiding interference with the cut and raised pieces 37 are provided through the attenuation layer 53. Thus, the surface of the attenuation layer 53 is formed into the same flat surface as the inner surface of the torque receiving plate 51. The attenuation layer 53 is attached to the inner surface of the torque receiving plate 51, for example, by an adhesive layer (not shown).

[0088] For example, a laminated gasket in which a metal support plate and an elastic material are bonded and laminated can be used as the damping layer 53. The damping layer 53 is formed into a laminated structure having an appropriate elastic modulus in the in-plane direction and the plane perpendicular direction. The laminated structure can be, for example, a structure in which rubber as an elastic material, a stainless steel plate as a metal support plate, an adhesive material as an elastic material, a cold-rolled steel plate as a metal support plate, and rubber as an elastic material are laminated in sequence. Of course, the damping layer 53 is not limited to the laminated structure of the present embodiment, and various laminated structures or single-layer structures can be used as long as the noise can be reduced by attenuating the vibration propagating between the lining assembly 15 and the torque receiving plate 51.

[0089] The damping layer 53 is provided between the torque receiving plate 51 and the back plate portion 49 in the friction pad assembly 200 , thereby serving as a member that covers at least the opening 47 that is an opening formed in the torque receiving plate 51 by the cut and raised pieces 37 .

[0090] According to the friction pad assembly 200 of the second embodiment, the convex portion 50 disposed on the back plate portion 49 is supported by the torque receiving plate 51 via the damping layer 53 in order to swingably support the lining assembly 15 , so that the lining assembly 15 can swingably be supported.

[0091] Furthermore, in the friction pad assembly 200 of the second embodiment, the vibration propagating between the lining assembly 15 and the torque receiving plate 51 is attenuated by the attenuation layer 53. The attenuation layer 53 helps reduce the noise generated by the contact between the torque receiving plate 51 and the back plate portion 49. Thus, the vibration generated during the primary braking process is attenuated, and the squealing noise (so-called brake noise) is suppressed.

[0092] Furthermore, in the friction pad assembly 200 of the second embodiment, the opening 47, which is the opening after the cut and raised piece 37 is cut and raised, is provided between the torque receiving plate 51 and the back plate portion 49 and is covered by the damping layer 53, which is a member covering the opening 47. The damping layer 53 can suppress foreign matter from entering between the torque receiving plate 51 and the back plate portion 49 through the opening 47 from the outside.

[0093] Third embodiment

[0094] Fig.11 FIG. 2 is a cross-sectional view of a friction pad assembly 300 according to a third embodiment of the present invention. Figures 1 to 10 The same components as shown are given the same reference numerals and repeated descriptions are omitted.

[0095] The friction pad assembly 300 of the third embodiment has at least one lining assembly 15 swingably supported on a guide plate 13 that receives a braking torque, and the lining assembly 15 is pressed against a disc rotor. The lining assembly 15 includes a friction member 29 that is pressed against the disc rotor during braking, and a back plate portion 17 that is fixed to the back of the friction member 29. The back plate portion 17 includes a plate fitting portion 31 that is swingably fitted into a guide hole portion 27 provided in the guide plate 13. The plate fitting portion 31 is inserted and attached to the guide hole portion 27, and the braking torque applied when the friction member 29 is pressed against the disc rotor is transmitted from the plate fitting portion 31 to the guide plate 13. A convex portion 41 swingably supporting the lining assembly 15 is arranged on a torque receiving plate 57 that is fixed to the guide plate 13.

[0096] The friction pad assembly 300 of the third embodiment is different from the above-mentioned friction pad assemblies 100 and 200 in that the anti-rotation restriction portion is not an essential component of the torque receiving plate 57. In addition, the friction pad assembly 300 is also different from the friction pad assembly 200 in that the damping layer 53 is attached to the back plate portion 17. It should be noted that the friction pad assembly 300 may also include the anti-rotation restriction portion. The other structures are substantially the same as those of the friction pad assembly 100.

[0097] Therefore, in the friction pad assembly 300 of the third embodiment, the convex portion 41 disposed on the torque receiving plate 57 supports the back plate portion 17 of the lining assembly 15 via the damping layer 53 in order to swingably support the lining assembly 15, so that the lining assembly 15 can swing freely. The convex portion 41 is stamped out in batches at positions corresponding to the lining assemblies 15 of the torque receiving plate 57, so that the structure for swingably supporting the lining assembly 15 can be manufactured inexpensively with a simple structure.

[0098] Furthermore, the vibration propagating between the lining assembly 15 and the torque receiving plate 57 is attenuated by the attenuation layer 53. The attenuation layer 53 helps reduce the noise generated by the contact between the torque receiving plate 57 and the back plate portion 17. Thus, the vibration generated during a braking process is attenuated, and the squealing noise (so-called brake noise) is suppressed.

[0099] Fourth embodiment

[0100] Fig.12 FIG. 4 is a cross-sectional view of a friction pad assembly 400 according to a fourth embodiment of the present invention. Figure 1 to Figure 3 The same components as shown are given the same reference numerals and repeated descriptions are omitted.

[0101] The rotation-stopping portion of the friction pad assembly 400 of the fourth embodiment is formed by a locking hole 71 formed in the torque receiving plate 69. The locking hole 71 is an opening that engages with a protrusion 65 formed in the back plate portion 67. The protrusion 65 is formed in the back plate portion 67 of the lining assembly 15 so as to protrude toward the torque receiving plate 69. The protrusion 65 may be formed integrally with the back plate portion 67, or a separate member may be fixed to the back plate portion 67.

[0102] Furthermore, in the friction pad assembly 400 of the fourth embodiment, the convex portion 41 is provided to protrude from the torque receiving plate 69 .

[0103] The friction pad assembly 400 of the fourth embodiment makes the protrusion 65 of the lining assembly 15 engage with the locking hole 71 of the torque receiving plate 69, thereby limiting the rotation of the lining assembly 15. Therefore, it is not necessary to provide the above-mentioned cut and raised piece 37 on the torque receiving plate 69. In addition, the back plate portion 67 may also omit the illustrated locking recess 39 for the cut and raised piece 37 to engage.

[0104] According to the friction pad assembly 400 of the fourth embodiment, the protrusion 65 is formed on the back plate portion 67, and the locking hole 71 engaged with the protrusion 65 is formed on the torque receiving plate 69. That is, similar to the case where the cut-and-raised piece 37 is provided on the torque receiving plate 11, the lining assembly 15 can be stopped by a simple structure using only the back plate portion 67 and the torque receiving plate 69 without using other components. In addition, in the fourth embodiment, since the processing of the torque receiving plate 69 is only the punching operation for forming the locking hole 71 and the bulging forming for bulging the convex portion 41, the processing of the torque receiving plate 69 becomes easier than the case where the cut-and-raised piece 37 is formed.

[0105] Fig.13 yes Fig.12 2 is a cross-sectional view of a friction pad assembly 400A according to a modified example of the friction pad assembly 400 shown.

[0106] In the friction pad assembly 400A of this modification, the convex portion 70 for swingably supporting the lining assembly 15 is formed on the back plate portion 73. Therefore, the torque receiving plate 75 is formed with only the locking hole 71 for the protrusion 65 to engage, and the convex portion 41 is not formed.

[0107] According to the friction pad assembly 400A, since the processing of the torque receiving plate 75 is only the punching work for forming the locking hole 71 , the processing of the torque receiving plate 75 can be performed more easily than when the cut and raised pieces 37 and the protrusions 41 are formed.

[0108] Fifth embodiment

[0109] Fig.14 FIG. 5 is a cross-sectional view of a friction pad assembly 500 according to a fifth embodiment of the present invention. Figure 1 to Figure 3 The same components as shown are given the same reference numerals and repeated descriptions are omitted.

[0110] like Figure 5 As shown, in the friction pad assembly 500 of the fifth embodiment, an anchor plate 521 is fixed to the back surface 11 a of the torque receiving plate 11 by rivets.

[0111] The friction pad assembly 500 is assembled by inserting the anchor plate 521 from the groove end into the dovetail-shaped fixing groove 545 formed in the brake pad mounting portion 543 (disk rotor side mounting surface of the pressing seat 525 ) of the caliper.

[0112] In the friction pad assembly 500 , the back surface 521a of the anchor plate 521 abuts against the bottom surface 545a of the fixing groove 545 of the pressing seat 525 of the caliper and is pressed toward the disc rotor. At this time, a gap G is formed between the back surface 11a of the torque receiving plate 11 and the brake pad mounting portion 543 .

[0113] Therefore, in the torque receiving plate 11 , the plurality of openings 47 opened in the back surface 11 a are covered by the brake pad mounting portion 543 with a small gap G being present between the back surface 11 a and the brake pad mounting portion 543 .

[0114] Therefore, the friction pad assembly 500 of the fifth embodiment covers the opening 47 with the brake pad mounting portion 543 , thereby preventing foreign matter from entering between the torque receiving plate 11 and the guide plate 13 through the opening 47 from the back side.

[0115] Therefore, according to the friction pad assemblies 100 , 100A, 200 , 400 , 400A, and 500 of the present embodiment, the anti-rotation structure of the lining assembly 15 can be realized at a low cost with a small number of parts.

[0116] Furthermore, according to the friction pad assemblies 100 , 100A, 200 , 400 , and 500 of the present embodiment, a structure for swingably supporting the lining assembly 15 can be realized with a small number of parts at a low cost.

[0117] It should be noted that the friction pad assembly for disc brakes of the present invention is not limited to the above-mentioned embodiment, and can be appropriately deformed, improved, etc. based on the main purpose of the present invention. For example, in the case where a friction pad assembly for disc brakes is composed of a plurality of unit friction pad assemblies, the number of the unit friction pad assemblies to be constructed can also be one or more than three.

[0118] Here, the features of the above-mentioned embodiment of the friction pad assembly for a disc brake of the present invention are briefly summarized and listed as follows.

[0119] [1] A friction pad assembly 100, 100A, 200, 400, 400A, 500 for a disc brake, wherein at least one lining assembly 15 is swingably supported on a guide plate 13 that receives a braking torque, and the lining assembly 15 is pressed against a disc rotor, wherein:

[0120] The lining assembly 15 includes: a friction member 29, which is pressed against the disc rotor during braking; and a back plate portion 17, 67, 73, which is fixed to the back side of the friction member 29, and the lining assembly is provided with a plate fitting portion 31 on the back plate portion 17, 67, 73, which is freely swingably fitted into the guide hole portion 27 provided in the guide plate 13,

[0121] The plate fitting portion 31 is fitted into the guide hole portion 27 , and the braking torque applied when the friction member 29 is pressed against the disc rotor is transmitted from the plate fitting portion 31 to the guide plate 13 .

[0122] A rotation restriction portion (cut and raised piece 37 and locking hole 71 ) for restricting the rotation of the lining assembly 15 is integrally formed on the torque receiving plate 11 , 51 , 69 , 75 fixed to the guide plate 13 .

[0123] [2] The friction pad assembly 100, 100A, 400, 500 for a disc brake according to [1] above, characterized in that:

[0124] The torque receiving plates 11 and 69 are provided with projections 41 that swingably support the lining assembly 15 .

[0125] [3] The friction pad assembly 200, 400A for a disc brake according to [1] above, characterized in that:

[0126] The convex parts 50 and 70 that swingably support the lining assembly 15 are arranged on the back plate parts 49 and 73 .

[0127] [4] The friction pad assembly 200 for a disc brake according to [2] or [3] above, characterized in that:

[0128] A damping layer 53 is provided between the back plate portion 49 and the torque receiving plate 51 .

[0129] [5] The friction pad assembly 100, 100A, 200, 500 for a disc brake according to any one of [1] to [4] above, characterized in that:

[0130] The rotation restriction portion is a cut-and-raised piece 37 formed on the torque receiving plate 11 , 51 so as to engage with a locking recess 39 formed on the back plate portion 17 , 49 .

[0131] [6] The friction pad assembly 100A for a disc brake according to [5] above, characterized in that:

[0132] A member (sealing plug 61 ) is provided between the torque receiving plate 11 and the back plate portion 17 , the member covering at least the opening 47 formed in the torque receiving plate 11 by the cut and raised pieces 37 .

[0133] [7] The friction pad assembly 400 or 400A for a disc brake according to any one of [1] to [3] above, characterized in that:

[0134] The rotation stop restricting portion is an opening (locking hole 71 ) formed in the torque receiving plates 69 , 75 so as to engage with the protrusion 65 formed on the back plate portions 67 , 73 .

[0135] [8] A friction pad assembly 300 for a disc brake, wherein at least one lining assembly 15 is swingably supported on a guide plate 13 that receives a braking torque, and the lining assembly 15 is pressed against a disc rotor, characterized in that:

[0136] The lining assembly 15 includes: a friction member 29, which is pressed against the disc rotor during braking; and a back plate portion 17, which is fixed to the back side of the friction member 29, and the lining assembly is provided on the back plate portion 17 with a plate fitting portion 31, which is freely swingably fitted into the guide hole portion 27 provided in the guide plate 13,

[0137] The plate fitting portion 31 is inserted and attached to the guide hole portion 27, and the braking torque applied when the friction member 29 is pressed against the disc rotor is transmitted from the plate fitting portion 31 to the guide plate 13.

[0138] The convex portion 41 that swingably supports the lining assembly 15 is disposed on the torque receiving plate 57 that is fixed to the guide plate 13 .

[0139] [9] The friction pad assembly 500 for a disc brake according to any one of [5] to [7] above, characterized in that:

[0140] The opening ( 47 , locking hole 71 ) formed in the torque receiving plate 11 is covered by the brake pad mounting portion 543 when the plate 11 is attached to the brake pad mounting portion 543 of the caliper to which the friction pad assembly for the disc brake is mounted.

[0141]

[10] The friction pad assembly 100 for a disc brake according to [9] above, characterized in that:

[0142] The opening ( 47 , locking hole 71 ) formed in the torque receiving plate 11 has its opening periphery in close contact with the brake pad mounting portion 43 of the caliper to which the friction pad assembly for the disc brake is mounted.

[0143] Description of reference numerals:

[0144] 11 Torque receiving plate

[0145] 13 Guide plate

[0146] 15 Lining assembly

[0147] 17 Back panel

[0148] 27 Guide hole

[0149] 29 Friction parts

[0150] 31 plate fitting part

[0151] 37 Cutting piece (rotation limiting part)

[0152] 39 Locking recess

[0153] 100 Friction pad assembly (friction pad assembly for disc brake)

Claims

1. A friction pad assembly for a disc brake, wherein at least one lining assembly is swingably supported on a guide plate that receives a braking torque, and the lining assembly is pressed against a disc rotor, characterized in that: The lining assembly comprises: a friction member pressed against the disc rotor during braking; and a back plate portion fixed to the back side of the friction member, and the lining assembly comprises: a plate fitting portion swingably fitted into a guide hole portion provided in the guide plate on the back plate portion, The plate fitting portion is fitted into the guide hole portion, and the braking torque acting when the friction member is pressed against the disc rotor is transmitted from the plate fitting portion to the guide plate. A rotation-stopping portion for limiting the rotation of the lining assembly is integrally formed on the torque receiving plate fixed to the guide plate. The torque receiving plate is provided with a protrusion that swingably supports the lining assembly. The rotation-stopping limiting portion is a cut-and-raised piece formed on the torque receiving plate in a manner that engages with a locking recess formed on the back plate portion, or the rotation-stopping limiting portion is an opening formed on the torque receiving plate in a manner that engages with a protrusion formed on the back plate portion.

2. A friction pad assembly for a disc brake, wherein at least one lining assembly is swingably supported on a guide plate that receives a braking torque, and the lining assembly is pressed against a disc rotor, characterized in that: The lining assembly comprises: a friction member pressed against the disc rotor during braking; and a back plate portion fixed to the back side of the friction member, and the lining assembly comprises: a plate fitting portion swingably fitted into a guide hole portion provided in the guide plate on the back plate portion, The plate fitting portion is fitted into the guide hole portion, and the braking torque acting when the friction member is pressed against the disc rotor is transmitted from the plate fitting portion to the guide plate. A rotation-stopping portion for limiting the rotation of the lining assembly is integrally formed on the torque receiving plate fixed to the guide plate. The back plate portion is provided with a convex portion that swingably supports the lining assembly. The rotation-stopping limiting portion is a cut-and-raised piece formed on the torque receiving plate in a manner that engages with a locking recess formed on the back plate portion, or the rotation-stopping limiting portion is an opening formed on the torque receiving plate in a manner that engages with a protrusion formed on the back plate portion.

3. The friction pad assembly for a disc brake according to claim 1 or 2, characterized in that: A damping layer is provided between the back plate portion and the torque receiving plate.

4. The friction pad assembly for a disc brake according to claim 1 or 2, characterized in that: When the rotation-stopping portion is a cut-and-raised piece formed on the torque receiving plate so as to engage with a locking recess formed on the back plate portion, a member that covers at least an opening formed on the torque receiving plate through the cut-and-raised piece is provided between the torque receiving plate and the back plate portion.

5. The friction pad assembly for a disc brake according to claim 1 or 2, characterized in that: The opening formed in the torque receiving plate is covered by the brake pad mounting portion when the torque receiving plate is attached to the brake pad mounting portion of the caliper to which the friction pad assembly for the disc brake is mounted.

6. The friction pad assembly for a disc brake according to claim 5, characterized in that: The opening periphery of the opening formed in the torque receiving plate is in close contact with the brake pad mounting portion of the caliper to which the friction pad assembly for the disc brake is mounted.

Images