JP6503843B2 - Retainer and disc brake device - Google Patents

Description

  The present invention relates to a retainer and a disk brake device.

  BACKGROUND ART In the prior art, for example, a retainer is known which is used for a disc brake device or the like and for retaining the shaft member from an object.

Patent No. 3409130 gazette

  With this kind of retaining tool, for example, it is significant if a new configuration that is easy to install can be obtained. Then, one of the subjects of the present invention is to obtain a disc brake device provided with a retaining device of a novel configuration that is easy to install and the retaining device.

In the retaining member according to the present invention, for example, a shaft member provided with a recess on the side surface is disposed through the object, and the recess is located on one side of the object in the axial direction of the shaft member. A retaining member for restricting the movement of the shaft member to the other side in the axial direction, the base portion and the base portion protruding along the axial direction from the base portion, around the axial center of the shaft member A plurality of first projecting pieces spaced apart from one another, and projecting from the base portion, are spaced apart from one another around the axial center, and alternately alternate around the first projecting piece and the axial center And a plurality of second projecting pieces positioned, wherein the first projecting piece and the second projecting piece project from the base portion to the other side in the axial direction, and the first projecting piece It enters the recess before Symbol second projecting piece, before the said object Facing one side of the portion of the axial direction. In this configuration, for example, the first projecting piece is easily extended by the fact that the first projecting piece protrudes along the axial direction of the shaft member. That is, it is easy to make the first projecting piece easy to bend. Therefore, since it is easy to put in the 1st projection piece in a crevice, it is easy to mount a retainer on a shaft member. In addition, for example, the first projecting piece and the second projecting piece may be supported in the axial direction of the shaft member to restrict movement of the shaft member to the other side in the axial direction of the shaft member.

  Further, in the retaining member, for example, the shaft member includes a main body portion, a hook portion provided on one side in the axial direction of the main body portion at a distance from the main body portion, the main body portion and the main body portion And the intervening portion interposed between the hooking portion and the hooking portion, wherein the recess is provided between the main body portion and the hooking portion, and the plurality of first projecting pieces are attached to the shaft by the retaining member. When the member is moved from one side in the axial direction toward the other side in the axial direction, a distance between inner portions of the plurality of first projecting pieces in the radial direction of the shaft member in the hook portion. Spreads and the spacing between the inner portions is reduced in the recess. Therefore, for example, the plurality of first projecting pieces can be inserted into the recess by moving the stopper to the other side in the axial direction of the shaft member. Therefore, the stopper can be attached to the shaft member relatively easily.

  Further, in the retaining member, for example, the first projecting piece and the second projecting piece extend from a portion outside the base portion in the radial direction of the shaft member. Therefore, for example, the base portion can be easily made smaller.

  Further, in the retaining member, for example, the base portion is provided with an opening portion into which a support portion provided at an end portion on one side in the axial direction of the shaft member is inserted. Thus, for example, the base portion is supported in the axial radial direction by the support portion by abutting on the support portion in the radial direction of the shaft member. Thereby, the radial movement of the shaft member of the stopper can be restricted.

  Moreover, in the retaining member, for example, the base portion has a convex portion. Thus, for example, the rigidity of the base portion is enhanced by the convex portion.

  Further, in the retaining member, for example, the three first projecting pieces are positioned at substantially equal intervals around the axial center. Therefore, for example, since it is easy to make the axial center of a shaft member and the central position of three 1st projection pieces match, it is easy to control that variation in load which acts on three 1st projection pieces arises.

  Moreover, the disc brake device of this invention is provided with the said retainer, for example. Therefore, for example, the operation and effects described for the retainer can be achieved.

FIG. 1 is a front view of the disk brake device of the first embodiment. FIG. 2 is a plan view of the disk brake device of the first embodiment. FIG. 3 is a side view of the disk brake device of the first embodiment. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. FIG. 5 is a cross-sectional view taken along the line VV of FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a perspective view of a part of the disk brake device of the first embodiment. FIG. 8 is a view showing a part of a cross section taken along line VIII-VIII of FIG. FIG. 9 is an enlarged view of a portion IX of FIG. FIG. 10 is an enlarged view of a portion X in FIG. FIG. 11 is a perspective view of the retaining member of the first embodiment. FIG. 12 is a front view of the retaining member of the first embodiment. FIG. 13 is a side view of the retaining member of the first embodiment. FIG. 14 is a plan view of the retaining member of the first embodiment. FIG. 15 is a perspective view showing another mounting posture of the retaining member of the first embodiment. FIG. 16 is a perspective view of a portion including the retaining member in the disk brake device of the second embodiment. FIG. 17 is a cross-sectional view of a part including the retaining member in the disk brake device of the second embodiment. FIG. 18 is a front view of a portion including the retaining member in the disc brake device of the second embodiment. FIG. 19 is an enlarged view of a portion XIX in FIG. FIG. 20 is a perspective view of the retaining member of the second embodiment.

  In the following, exemplary embodiments of the present invention are disclosed. The configurations of the embodiments shown below, and the operations and results (effects) provided by the configurations are examples. The present invention can also be realized with configurations other than the configurations disclosed in the following embodiments. Further, according to the present invention, it is possible to obtain at least one of various effects (including derivative effects) obtained by the configuration.

  In addition, a plurality of embodiments disclosed below include similar components. Below, while a common code | symbol is provided to the same component, the overlapping description is abbreviate | omitted. Also, in the following, the X direction, the Y direction, and the Z direction are defined for the sake of convenience. The X, Y, and Z directions are orthogonal to one another.

First Embodiment
The present embodiment is an example in which the disk brake device of the present invention is applied to a piston facing (fixed) disk brake device for a vehicle. As shown in FIGS. 1 to 7, the disc brake device 1 according to the present embodiment is assembled to an axle hub (a rotating body, not shown) and rotates integrally with a wheel (not shown). 4), a caliper 20 disposed so as to straddle a part of the outer peripheral portion of the disc rotor 10, six pistons 31 to 36 assembled to the caliper 20, an inner side brake pad 40, and an outer And a side brake pad 50. The disk brake device 1 further includes an inner support shaft 61 and an outer support shaft 71 provided on the caliper 20, and biasing members 81 and 82. Hereinafter, the axial direction of the disk rotor 10 is also referred to as a rotor axial direction, the radial direction of the disk rotor 10 as a rotor radial direction, and the circumferential direction of the disk rotor 10 as a rotor circumferential direction.

  The disk rotor 10 shown in FIG. 4 rotates with respect to the caliper 20. The disk rotor 10 has an annular braked surface (not shown) which can be held by the lining 42 of the inner brake pad 40 and the lining 52 of the outer brake pad 50. Further, the disc rotor 10 is braked against rotation by being held between the lining 42 of the inner side brake pad 40 and the lining 52 of the outer side brake pad 50 at the time of braking. During forward rotation of the wheel, the disk rotor 10 rotates clockwise (forward rotation) in FIG. 4 integrally with the wheel, and the left side of FIG. 4 becomes the turning-in side (leading side), and the right side of FIG. The side is the turning side (trailing side). In the following, one side in the rotor circumferential direction is referred to as one side in the rotor circumferential direction, and one side in the rotor circumferential direction is referred to as the other side in the rotor circumferential direction.

  As shown in FIGS. 1 to 6, the caliper 20 includes an inner housing portion 21 and an outer housing portion 22 spaced apart from each other in the axial direction of the rotor, and four connecting portions 23 connecting these. , 24, 25, 26 are provided. The caliper 20 straddles the outer periphery of a portion of the disk rotor 10 with the portion of the disk rotor 10 positioned between the inner housing portion 21 and the outer housing portion 22. The inner housing part 21 and the outer housing part 22 are an example of a pair of opposing parts.

  The inner housing portion 21 is disposed on the inner side of the disc rotor 10 and has three cylinders. The three cylinders are arranged at predetermined intervals in the rotor circumferential direction. Each cylinder is formed to extend in the axial direction of the rotor.

  Further, the inner housing portion 21 has supporting portions 21c and 21d. The support portion 21 c supports the inner support shaft 61, and the support portion 21 d supports the outer support shaft 71.

  Further, the inner housing portion 21 has a pair of attachment portions 21e and 21f extending inward in the rotor diameter at the rotor diameter inward end. The inner housing portion 21 is configured to be attached to the vehicle body side (support) using bolts (not shown) at the attachment portions 21e and 21f.

  As shown in FIG. 5, the outer housing portion 22 is disposed on the outer side of the disc rotor 10, and has three cylinders, as the inner housing portion 21 does. Further, the outer housing portion 22 has supporting portions 22c and 22d in the same manner as the supporting portions 21c and 21d of the inner housing portion 21. The support portion 22 c supports the inner support shaft 61, and the support portion 22 d supports the outer support shaft 71.

  Each of the pistons 31 to 36 shown in FIG. 7 is, as is well known, assembled to each cylinder so as to be fluid tight and slidable in the axial direction of the rotor, and is disposed opposite to each other with the disc rotor 10 interposed therebetween. Further, each piston 31 to 36 is pushed by the hydraulic oil supplied from the brake master cylinder (not shown) to the oil chamber formed between each piston and the cylinder when the disc rotor 10 is braked, and the inner side brake The pad 40 and the outer brake pad 50 can be pressed toward the disk rotor 10 in the axial direction of the rotor. The oil chambers are in communication with each other through oil passages 20 a provided in the caliper 20. The pistons 31 to 36 and the cylinder constitute a pressing portion 37 provided on the caliper 20 and pressing the inner brake pad 40 and the outer brake pad 50 toward the disc rotor 10.

  The inner side brake pad 40 and the outer side brake pad 50 shown in FIGS. 4, 5 and 7 are positioned with the disc rotor 10 in the axial direction of the rotor. The inner side brake pad 40 and the outer side brake pad 50 are examples of a pair of brake pads.

  The inner brake pad 40 has a back plate 41 and a lining 42 fixed to the back plate 41, as shown in FIGS. The inner brake pad 40 is disposed on the inner housing 21 side of the caliper 20 and is assembled to the inner support shaft 61 and the outer support shaft 71 by the back plate 41. A predetermined amount (slight amount) can be rotated about the axial center, that is, it can be pivotably mounted.

  The back plate 41 is formed in a flat plate shape as shown in FIG. The back plate 41 has an inner portion 41A which extends inward in the rotor radial direction from the lining 42 and in which a V-shaped inner peripheral torque receiving surface 41a is formed. Further, the back plate 41 has an outer portion 41 B which extends outward in the rotor radial direction from the lining 42 and on which a V-shaped outer peripheral torque receiving surface 41 b is formed. The inner peripheral side torque receiving surface 41 a is provided on the inner side in the rotor radial direction of the back plate 41 and at the central portion in the circumferential direction of the rotor. The inner torque receiving surface 41 a engages with the inner support shaft 61. The outer circumferential torque receiving surface 41 b is provided on the outer side in the rotor radial direction of the back plate 41 and in the central portion in the circumferential direction of the rotor. The outer circumferential torque receiving surface 41 b engages with the outer support shaft 71. The inner peripheral side torque receiving surface 41a is an example of the inner side support portion provided on the inner side of the inner side brake pad 40 in the rotor radial direction, and the outer peripheral side torque receiving surface 41b is the inner side in the rotor radial direction. 5 is an example of an outer support provided on an outer portion of the brake pad 40. FIG.

  Further, as shown in FIG. 7, a lining 42 is attached to the surface of the back plate 41 on the side of the disk rotor 10, and the surface of the back plate 41 opposite to the disk rotor 10, ie, pistons 31, 32 and 33. An inner shim ISa and an outer shim ISb are attached to the side surface.

  The lining 42 is formed in a substantially fan shape so as to extend in the circumferential direction of the rotor. In the lining 42, the pistons 31, 32 and 33 press the back plate 41 via the inner shim ISa and the outer shim ISb, thereby slidably pressing the disc rotor 10 against the surface to be braked and braking the disc rotor 10. It is possible. At the time of forward rotation braking of the disk rotor 10 (during braking of the disk rotor at the time of forward movement of the vehicle), the lining 42 pressed slidably against the surface to be braked of the disk rotor 10 Frictional force acts on the outlet side.

  The outer brake pad 50 has a back plate 51 and a lining 52 fixed to the back plate 51, as shown in FIGS. The outer brake pad 50 is disposed on the outer housing portion 22 side of the caliper 20 and is assembled to the inner support shaft 61 and the outer support shaft 71 by the back plate 51. A predetermined amount (slight amount) can be rotated around the center, that is, it is mounted so as to be swingable.

  The back plate 51 is formed in a flat plate shape, as shown in FIGS. The back plate 51 has an inner portion 51A which extends inward in the rotor radial direction from the lining 52 and in which a V-shaped inner peripheral torque receiving surface 51a is formed. Further, the back plate 51 has an outer portion 51B which extends outward in the rotor radial direction from the lining 52 and on which a V-shaped outer peripheral torque receiving surface 51b is formed. The inner torque receiving surface 51 a is provided on the inner side in the rotor radial direction of the back plate 51 and in the central portion in the circumferential direction of the rotor. The inner torque receiving surface 51 a engages with the inner support shaft 61. The outer circumferential torque receiving surface 51 b is provided on the outer side in the rotor radial direction of the back plate 51 and in the central portion in the circumferential direction of the rotor. The outer circumferential torque receiving surface 51 b engages with the outer support shaft 71. The inner peripheral side torque receiving surface 51a is an example of the inner side support portion provided on the inner side of the outer side brake pad 50 in the rotor radial direction, and the outer peripheral side torque receiving surface 51b is the outer side in the rotor radial direction 5 is an example of an outer support provided on an outer portion of the brake pad 50. FIG.

  Further, as shown in FIG. 7, a lining 52 is attached to the surface of the back plate 51 on the side of the disk rotor 10, and the surface of the back plate 51 opposite to the disk rotor 10, ie, pistons 34, 35, 36 An inner shim OSa and an outer shim OSb are attached to the side surface.

  The lining 52 is formed in a substantially fan shape so as to extend in the circumferential direction of the rotor. In the lining 52, the pistons 34, 35, 36 press the back plate 51 via the inner shim OSa and the outer shim OSb, thereby slidably pressing the disc rotor 10 against the braking surface of the disc rotor 10 to brake the disc rotor 10. It is possible. At the time of forward rotation braking of the disk rotor 10 (during braking of the disk rotor at the time of forward movement of the vehicle), the lining 52, which is slidably pressed against the surface to be braked of the disk rotor 10 Frictional force acts on the outlet side.

  As shown in FIGS. 1 and 3 to 7, the inner support shaft 61 extends in the axial direction of the rotor and is screwed to each of the support portions 21 c and 22 c of the caliper 20. The inner support shaft 61 is supported by the caliper 20 and supports the inner peripheral torque receiving surfaces 41 a and 51 a of the inner brake pad 40 and the outer brake pad 50.

  As shown in FIGS. 1 to 7, the outer support shaft 71 extends in the axial direction of the rotor and is inserted into each of the support portions 21 d and 22 d of the caliper 20. The outer support shaft 71 is prevented from coming off the caliper 20 by a flange 71a (FIG. 2) provided on the outer support shaft 71 and a retainer 91 (FIG. 2). The outer support shaft 71 is supported by the caliper 20, and enables the inner brake pad 40 and the outer brake pad 50 to swing around the inner support shaft 61, so that each of the inner brake pad 40 and the outer brake pad 50 can The outer peripheral side torque receiving surfaces 41 b and 51 b are supported. The outer support shaft 71 is an example of a shaft member.

  The outer support shaft 71 and the stopper 91 will be described in detail. Hereinafter, the axial direction of the outer support shaft 71 is referred to as a support shaft direction, the radial direction of the outer support shaft 71 is referred to as a support shaft radial direction, and the circumferential direction of the outer support shaft 71 is referred to as a support shaft circumferential direction. As shown in FIGS. 8 and 10, the outer support shaft 71 includes a main body portion 71b, a hooking portion 71c, an intervening portion 71d, and a support portion 71e. The main body 71b is inserted into an opening 21d1 provided in the support 21d and an opening 22d1 provided in the support 22d. The hooking portion 71c is provided on one side (left side in FIG. 8) of the support shaft direction of the main body portion 71b, and is spaced apart from the main body portion 71b. The diameter of the hooking portion 71c is, for example, smaller than the diameter of the main portion 71b. The hooking portion 71c has an annular support surface 71f and an annular guide surface 71g. The support surface 71f extends in the support shaft radial direction and faces the main body 71b. The guide surface 71g is a cylindrical surface extending from the outer peripheral edge of the support surface 71f to one side in the spindle direction. At least a portion of the guide surface 71g decreases in diameter from the other side (right side in FIG. 8) to the one side (left side in the drawing) in the spindle direction. The intervening portion 71 d is interposed between the main body portion 71 b and the hooking portion 71 c. The diameter of the interposing portion 71 d is smaller than the diameter of the main body portion 71 b and the diameter of the hooking portion 71 c. With such a configuration, a recess 71 h is provided between the main body 71 b and the hooking portion 71 c. The support surface 71 f forms a part of the recess 71 h. The recess 71 h is annularly provided on the side surface 71 i of the outer support shaft 71. The support portion 71e protrudes from one end surface of the hook portion 71c in the support shaft direction to one side in the support shaft direction. In other words, the support portion 71e is provided at one end 71j of the outer support shaft 71 in the support shaft direction. The support part 71e is formed in a cylindrical shape as an example. The diameter of the support portion 71e is smaller than the diameter of the hook portion 71c. The outer support shaft 71 having the above configuration is disposed through the support portions 21d and 22d, and the recess 71h is positioned on one side in the support shaft direction of the support portion 22d. The support 22 d is an example of an object. The support 22d may also be referred to as a wall.

  The retainer 91 prevents the outer support shaft 71 from being removed by restricting the movement of the outer support shaft 71 to the other side (right side in FIG. 8) of the support shaft direction. The retainer 91 has a base portion 91a, a plurality of first projecting pieces 91b, and a plurality of second projecting pieces 91c, as shown in FIGS. The base portion 91 a is formed in an annular shape around the axial center Ax (FIG. 8) of the outer support shaft 71. The base portion 91a has a flat annular portion 91d and a convex portion 91e connected to the inner peripheral portion of the annular portion 91d. The convex portion 91 e is formed in a conical shape that decreases in diameter toward one side in the spindle direction. In addition, an opening 91 f is provided at the center of the protrusion 91 e. The opening 91 f is a through hole which penetrates the protrusion 91 e in the support shaft direction. The support part 71e is put in the opening part 91f.

  The plurality of first projecting pieces 91 b protrude from the base portion 91 a along the support shaft direction to the other side in the support shaft direction, and are spaced apart from each other around the axial center Ax of the outer support shaft 71. In the present embodiment, as an example, the three first projecting pieces 91 b are positioned at substantially equal intervals around the axial center Ax of the outer support shaft 71. The first projecting piece 91 b extends from the outer portion of the base portion 91 a in the support shaft radial direction. The first projecting piece 91 b has an extending portion 91 g and a curved portion 91 h. The extension portion 91g protrudes from the base portion 91a to the other side in the support axis direction along the support axis direction. The extending portion 91g goes outward in the support shaft radial direction as it goes to the other side in the support shaft direction. The bent portion 91h is folded back to one side in the support shaft direction from the other end of the extension portion 91g in the support shaft direction while facing inward in the support shaft radial direction. The curved portion 91 h is in the recess 71 h (FIG. 10). The distal end surface (distal end) of the bending portion 91h, that is, the distal end surface 91i of the first projecting piece 91b faces the support surface 71f of the outer support shaft 71 (FIG. 10). The diameter of the circle passing through the tips of the plurality of first projecting pieces 91b is smaller than the diameter of the support surface 71f. The first projecting piece 91 b is elastically deformable.

  Further, the plurality of second projecting pieces 91c project from the base portion 91a along the support shaft direction to the other side in the support shaft direction, and are spaced apart from each other around the axial center Ax of the outer support shaft 71. . In the present embodiment, as an example, three second projecting pieces 91 c are positioned at substantially equal intervals around the axial center Ax of the outer support shaft 71. The plurality of second projecting pieces 91 c are alternately positioned around the axial center Ax of the first projecting piece 91 b and the outer support shaft 71. The first projecting piece 91 b and the second projecting piece 91 c are positioned at substantially equal intervals around the axis Ax. In the present embodiment, the length of the second projecting piece 91c is longer than the length of the first projecting piece 91b. The second projecting piece 91c has an extending portion 91j and a curved portion 91k. The extension portion 91 j protrudes from the base portion 91 a along the support shaft direction to the other side in the support shaft direction. The extending portion 91 j goes outward in the support shaft radial direction as it goes to the other side in the support shaft direction. The bent portion 91k is bent inward in the support shaft radial direction from the other end of the extension portion 91j in the support shaft direction. The curved portion 91k faces the surface 22d2 on one side in the spindle direction of the support portion 22d (FIG. 10). The diameter of the circle passing through the tips of the plurality of second projecting pieces 91c is larger than the diameter of the opening 22d1 of the support 22d. The second projecting piece 91c is elastically deformable.

  The retaining tool 91 having the above configuration is attached to the outer support shaft 71 by being moved from one side in the support shaft direction of the outer support shaft 71 toward the other side in the support shaft direction (FIG. 10). At this time, the plurality of first projecting pieces 91b abut on one end of the guide surface 71g of the hook portion 71c in the spindle direction, and then slide on the guide surface 71g, for example. The first projection piece 91b elastically deforms (flexes) so that the distance between the end surfaces 91i, which are the inner portions in the support shaft radial direction, increases. When passing through the guide surface 71g, the plurality of first projecting pieces 91b enter the recess 71h to elastically deform (restore) the space between the tip surfaces 91i in the recess 71h. Thus, the tip end surface 91i of the first protruding piece 91b faces the support surface 71f of the outer support shaft 71. At this time, the plurality of first projecting pieces 91b slide on the guide surface 71g of the hooking portion 71c, whereby the radial alignment of the retaining member 91 with respect to the outer support shaft 71 is performed. Further, at this time, the second protruding piece 91c is moved in a state of being separated from the hooking portion 71c, as an example. Then, the curved portion 91k faces the surface 22d2 on one side in the spindle direction of the support portion 22d. Further, at this time, the support portion 71e enters the opening 91f. Thus, in the retaining member 91 mounted on the outer support shaft 71, when the force to the other side in the support shaft direction acts on the outer support shaft 71, the tip end surface 91i of the first projecting piece 91b is supported on the outer support The support surface 71f of the shaft 71 is caught (abuts), the curved portion 91k of the second projecting piece 91c is caught (abuts) on the surface 22d2 of the supporting portion 22d, and the first projecting piece 91b and the second projecting piece 91c Stretches in the direction of the support shaft. Thus, the movement of the outer support shaft 71 to the other side in the support shaft direction is limited. Further, the stopper 91 is supported by the support portion 71e in the support shaft radial direction by contacting the support portion 71e in the support shaft radial direction, and the movement in the support shaft radial direction is restricted. In the retainer 91 mounted in this manner, the three first projecting pieces 91b are positioned at substantially equal intervals around the axial center Ax of the outer support shaft 71, so the first projecting pieces 91b are recessed. Hard to get out of 71h. That is, the stopper 91 does not easily come off the outer support shaft 71.

  As shown in FIGS. 4 and 5, the biasing member 81 is interposed between the caliper 20 and the outer support shaft 71, and pushes the outer support shaft 71 inward in the radial direction of the rotor so that the outer support shaft 71 is to bound. Specifically, as shown in FIG. 7, the biasing member 81 has a base portion 81 a and a pair of arm portions 81 b and 81 c, and is configured as a plate spring. The base portion 81 a is formed in a curved shape that covers the outer portion of the outer support shaft 71 in the rotor radial direction, and is overlapped with the outer portion of the outer support shaft 71 in the rotor radial direction. The arm portion 81b extends from the base portion 81a toward the circumferential side in the rotor circumferential direction, and is hooked on the limiting portion 25a provided concavely in the inner portion in the rotor radial direction of the connecting portion 25 and supported by the connecting portion 25. ing. Movement of the arm portion 81 b in the rotor radial direction and the rotor axial direction is restricted by the restricting portion 25 a. The arm portion 81 b has a curved portion 81 d at its tip, and the curved portion 81 d is in contact with the limiting portion 25 a. On the other hand, the arm portion 81 c extends from the base portion 81 a to the circumferentially inward side in the rotor circumferential direction, and is hooked on the limiting portion 24 a provided concavely in the rotor radial direction in the connecting portion 24. It is supported. Movement of the arm portion 81c in the rotor radial direction and the rotor axial direction is restricted by the restriction portion 24a. The arm portion 81c has a bending portion 81e at the tip end thereof, and the bending portion 81e is in contact with the limiting portion 24a. The biasing member 81 configured as described above generates a pressing force that pushes the outer support shaft 71 inward in the rotor radial direction. The reaction force at this time acts on the connecting portions 24 and 25. The direction of the pressing force is indicated by an arrow F1 in FIG. 4, and the direction of the reaction force is indicated by an arrow F2 in FIG. The biasing member 81 is an example of a second biasing member.

  The biasing member 82 is positioned on the outer side in the rotor radial direction of the inner side brake pad 40 and the outer side brake pad 50 as shown in FIGS. 4 to 7, and the caliper 20 and the inner side brake pad 40 and the outer side brake pad It is between 50 and 50. The biasing member 82 pushes the inner brake pad 40 and the outer brake pad 50 inward in the rotor radial direction. Specifically, as shown in FIG. 7, the biasing member 82 includes a base portion 82a, a pair of plate spring portions 82b and 82c, and an extending portion 82d. The base portion 82a, the pair of leaf spring portions 82b and 82c, and the extension portion 82d are integrally formed. The pair of leaf spring portions 82 b and 82 c is an example of the pair of spring portions.

  The base portion 82a is attached to the connecting portion 25 of the caliper 20, as shown in FIG. The base 82a has a wall 82e and four (plural) mounting arms 82f. The wall 82 e extends in the axial direction of the rotor, and is overlapped with the inner surface in the rotor radial direction of the connecting portion 25 (FIGS. 4 and 5). The two mounting arms 82f are provided at one end of the wall 82e in the circumferential direction of the rotor and extend outward in the radial direction of the rotor, and the other two mounting arms 82f are at the other end of the wall 82e in the circumferential direction of the rotor It is provided and extends outward in the rotor radial direction. Each mounting arm 82f is configured as a curved plate spring. The base portion 82a is attached to the connecting portion 25 by the four attachment arms 82f sandwiching the connecting portion 25 in the circumferential direction of the rotor by their elastic force.

  The pair of leaf spring portions 82b and 82c are positioned to be spaced apart from each other in the axial direction of the rotor. The pair of flat spring portions 82 b and 82 c extend from the base portion 82 a toward the circumferential side in the circumferential direction of the rotor and to the inner brake pad 40 and the outer brake pad 50. Two mounting arms 82f are positioned between the pair of leaf spring portions 82b and 82c. The flat spring portion 82 b has a curved portion 82 g at its tip end that contacts the back plate 41 of the inner brake pad 40. The curved portion 82g is formed in a convex shape inward in the rotor radial direction. The flat spring portion 82b has a curved portion 82h between the base portion 82a and the contact portion (curved portion 82g) with the inner side brake pad 40. The curved portion 82 h is formed in a convex shape toward the outer side in the rotor radial direction. In addition, the flat spring portion 82c has a curved portion 82i at its tip end that contacts the back plate 51 of the outer brake pad 50. The curved portion 82i is formed in a convex shape inward in the rotor radial direction. The flat spring portion 82c has a curved portion 82j between the base portion 82a and the contact portion (curved portion 82i) with the outer brake pad 50. The curved portion 82 j is formed in a convex shape toward the outer side in the rotor radial direction. In the above configuration, the leaf spring portion 82b pushes the inner brake pad 40 inward in the rotor radial direction, and the leaf spring portion 82c pushes the outer brake pad 50 inward in the rotor radial direction.

  Each flat spring portion 82b, 82c has at least the width of the curved portion 82g, 82i in the rotor axial direction, the thickness of the back plate 41, 51 in the rotor axial direction, and the rotor of the new (not worn) lining 42, 52 It is formed to have a width substantially equal to or greater than the value obtained by adding the axial thickness. Thus, even when the axial positions of the back plates 41 and 51 shift due to wear of the linings 42 and 52, the plate spring portions 82b and 82c are made to abut on the back plates 41 and 51, and the plate spring portions 82b and 82c. Makes it possible to press the back plates 41 and 51.

  The extending portion 82d is located between the pair of leaf spring portions 82b and 82c. The extending portion 82d extends from the base portion 82a toward the circumferential side of the rotor. The tip end 82k of the extension 82d is bent outward in the rotor radial direction. As shown in FIG. 4, the tip end 82 k is hooked on the limiting portion 26 a provided concavely in the inner portion in the rotor radial direction of the connecting portion 26, and is supported from the outside in the rotor radial direction by the limiting portion 26 a There is. The movement of the tip portion 82k in the rotor radial direction and the rotor axial direction is limited by the limiting portion 26a.

  In the biasing member 82 configured as described above, the leaf spring portion 82b is on the turnout side of the back plate 41 so that the turn-in side portion of the inner brake pad 40 is on the outer side in the rotor radial direction compared to the turnout side portion. A pressing force (elastic force) is generated which pushes (biases) the outer periphery of the portion inward in the radial direction of the rotor. On the other hand, the plate spring portion 82c is such that the outer periphery of the turnout side portion of the back plate 51 is on the inner side in the rotor radial direction so that the turn-in side portion of the outer brake pad 50 is on the outer side in the rotor radial direction The pressure (elastic force) is generated. The reaction force at this time acts on the connecting portion 25. The direction of the pressing force is indicated by an arrow F3 in FIG. 4, and the direction of the reaction force is indicated by an arrow F4 in FIG.

  In the above configuration, the back plate 41 of the inner brake pad 40 is at two positions from 1 o'clock to 2 o'clock and 10 o'clock to 11 o'clock with respect to the inner support shaft 61 in FIG. 4 of the inner circumferential side torque receiving surface 41a. The inner support shaft 61 is engaged with no gap, and the outer support shaft 71 has a gap at one position from 7 o'clock to 8 o'clock with respect to the outer support shaft 71 in FIG. Engaged at zero.

  On the other hand, the back plate 51 of the outer brake pad 50 is located at two positions from 1 o'clock to 2 o'clock and 10 o'clock to 11 o'clock with respect to the inner support shaft 61 in FIG. While engaging with the inner support shaft 61 with no clearance, engaging with the outer support shaft 71 with no clearance at one position from the 4 o'clock to the 5 o'clock position with respect to the outer support shaft 71 in FIG. It is correct.

  In the disk brake device 1 having the above configuration, when the hydraulic fluid is supplied from the brake master cylinder (not shown) to the respective oil chambers in accordance with the depression of the brake pedal (not shown), each of the pistons 31 to 36 It is pushed toward the disc rotor 10 to press the inner brake pad 40 and the outer brake pad 50 toward the disc rotor 10. As a result, the linings 42 and 52 of the inner side brake pad 40 and the outer side brake pad 50 slidably contact the surface to be braked of the disc rotor 10 to brake the disc rotor 10. When the depression of the brake pedal (not shown) is released and the hydraulic fluid is discharged from each oil chamber to the brake master cylinder (not shown), the braking of the disk rotor 10 described above is released.

  In the disk brake device 1 configured as described above, when the disk rotor 10 is braked (positive rotation braking), the V-shaped inner peripheral torque receiving surfaces 41a and 51a of the inner brake pad 40 and the outer brake pad 50 are internally supported. A total of two engaging portions with the shaft 61, and V-shaped outer circumferential torque receiving surfaces 41b and 51b of the inner brake pad 40 and the outer brake pad 50 and one engaging portion of the outer support shaft 71 The torque at the time of braking can be received in three places. Therefore, the behavior of the inner side brake pad 40 and the outer side brake pad 50 is stabilized as compared with the case where torque during braking is received on an unstable plane. For this reason, it is possible to suppress the occurrence of the brake noise accompanying the unstable behavior at the time of braking. Further, the area (machining area) of the portion receiving the torque at the time of braking can be reduced as compared with the case where the torque at the time of braking is received by the unstable plane, and the processing cost can be reduced.

  Further, in the present embodiment, each back plate 41, 51 is biased by the biasing member 82 so that the outer periphery of the rotation side portion is directed inward in the rotor radial direction, and the inner brake pad 40 and the outer brake pad 50 The inlet side portion of the rotor is set to be outer than the rotor side in the radial direction of the rotor. Therefore, the three points which receive the torque at the time of braking are engaged (abutment) in advance before braking by the biasing force of the biasing member 82. For this reason, when the disc rotor 10 is not braking, it is possible to suppress rattling between the inner support shaft 61 and the outer support shaft 71 assembled to the caliper 20 and the respective brake pads 40 and 50.

  As described above, in the present embodiment, the first projecting piece 91 b of the retaining member 91 protrudes in the support shaft direction in the present embodiment. This makes it easy to increase the length of the first projecting piece 91b. That is, the first projecting piece 91b can be easily bent. Accordingly, since the first projecting piece 91b can be easily inserted into the recess 71h, the retaining member 91 can be easily attached to the outer support shaft 71.

  Further, in the present embodiment, when the retaining member 91 is moved from one side in the support shaft direction of the outer support shaft 71 toward the other side in the support shaft direction, the plurality of first projecting pieces 91 b The distance between the end surfaces 91i, which are the inner portions in the spindle radial direction of the first projecting piece 91b, increases, and the distance between the end surfaces 91i decreases in the recess 71h. Therefore, the plurality of first projecting pieces 91b can be inserted into the recess 71h by moving the retaining member 91 to the other side in the support shaft direction. Therefore, the retainer 91 can be attached to the outer support shaft 71 relatively easily.

  Further, in the present embodiment, the first projecting piece 91b and the second projecting piece 91c project from the base portion 91a to the other side in the support shaft direction, and the second projecting piece 91c of the base portion 91a and the second projecting piece 91c. The two projecting pieces 91c face the surface 22d2 of the support 22d. Therefore, movement of the outer support shaft 71 to the other side in the support shaft direction can be restricted by the first protruding piece 91 b and the second protruding piece 91 c being stretched in the support shaft direction.

  Further, in the present embodiment, the first projecting piece 91 b and the second projecting piece 91 c extend from the outside portion of the base portion 91 a in the support shaft radial direction. Therefore, the base portion 91a can be easily made smaller.

  Further, in the present embodiment, the base 91a is provided with the opening 91f, and the opening 91f is inserted with the support 71e provided at the end 71j on one side of the support shaft direction of the outer support shaft 71. Be done. Thus, the base portion 91a can be supported by the support portion 71e. The base portion 91a is supported by the support portion 71e in the support shaft diameter direction by abutting on the support portion 71e in the support shaft diameter direction. Thereby, the movement of the retaining member 91 in the support shaft radial direction can be limited.

  Further, in the present embodiment, the base portion 91a has a convex portion 91e. Thus, the rigidity of the base portion 91a is enhanced by the convex portion 91e.

  Further, in the present embodiment, the three first projecting pieces 91 b are positioned at substantially equal intervals around the axial center Ax of the outer support shaft 71. Therefore, the axial center Ax of the outer support shaft 71 and the center position of the three first projecting pieces 91 b can be easily matched, and therefore, it is easy to suppress the occurrence of variations in the load acting on the three first projecting pieces 91 b. .

  The stopper 91 is rotatable around the axis Ax of the outer support shaft 71. Therefore, as shown in FIG. 9, the retainer 91 is not only in a posture in which a certain first projecting piece 91b is positioned on the outside in the support shaft radial direction, for example, as shown in FIG. The second projecting piece 91c can be in a posture or the like positioned on the outer side in the support shaft radial direction.

Second Embodiment
In the present embodiment, as shown in FIGS. 16-20, the outer support shaft 71 and the stopper 91 are mainly different from the first embodiment.

  As shown in FIGS. 16 to 19, the outer support shaft 71 has a main body 71 b, a hook 71 c, and an intervening portion 71 d, but does not have a support 71 e. Further, as shown in FIG. 19, the support surface 71 f forming a part of the recess 71 h is an inclined surface which is directed outward in the support shaft radial direction as it goes to one side in the support shaft direction (left side in FIG. 19). . Moreover, the support part 71k is provided in the surface of the one side of the spindle direction of the main-body part 71b. The support portion 71k is formed in an annular shape. The diameter of the support portion 71k is smaller than the diameter of the main portion 71b.

  Further, as shown in FIGS. 19 and 20, the base portion 91a of the stopper 91 is constituted by an annular portion 91d, and the convex portion 91e is not provided. The diameter of the base portion 91a (annular portion 91d) is larger than the diameter of the opening 22d1. The base portion 91a faces the surface 22d2 of the support portion 22d.

  In addition, the first projecting piece 91b has the extending portion 91g but does not have the curved portion 91h. The first projecting piece 91b (the extending portion 91g) protrudes from the base portion 91a to one side in the spindle direction. The first protruding piece 91 b protrudes from the inner portion in the support shaft radial direction of the base portion 91 a. The end surface 91i of the first projecting piece 91b faces the support surface 71f of the outer support shaft 71 and is along the support surface 71f (FIG. 19). That is, the tip end surface 91i is inclined with respect to the axial center Ax of the outer support shaft 71 similarly to the support surface 71f. The first projecting piece 91b is provided with a curved portion 91m between the base 91a and a tip surface 91i in contact with the outer support shaft 71 of the first projecting piece 91b. The curved portion 91m is formed to be convex toward the outside in the support shaft radial direction.

  The second projecting piece 91c has the extending portion 91j but does not have the curved portion 91k. The second projecting piece 91c (the extending portion 91j) protrudes from the inner portion in the support shaft radial direction of the base portion 91a to the inside in the support shaft radial direction, and faces the support portion 71k of the outer support shaft 71 in the radial direction. The diameter of the circle passing through the tip of the second projecting piece 91c may be smaller than the minimum diameter of the guide surface 71g, or may be approximately the same diameter as the maximum diameter of the guide surface 71g.

  Further, in the present embodiment, five first projecting pieces 91 b and five second projecting pieces 91 c are provided, and are positioned at substantially equal intervals around the axis Ax. The first projecting piece 91 b and the second projecting piece 91 c may be three as in the first embodiment.

  The retaining tool 91 having the above configuration is mounted on the outer support shaft 71 by being moved from one side in the support shaft direction of the outer support shaft 71 toward the other side in the support shaft direction. At this time, the second projecting piece 91c is moved to a position facing the support portion 71k of the outer support shaft 71 in the support shaft radial direction via the guide surface 71g and the recess 71h. At this time, the case where the diameter of a circle passing through the tip of the second protruding piece 91c is smaller than the minimum diameter of the guide surface 71g will be described. In this case, the plurality of second projecting pieces 91c, by way of example, abut on one end of the guide surface 71g of the hook portion 71c in the support shaft direction and then slide the guide surface 71g, The second projection piece 91c elastically deforms (flexes) so that the distance between tip surfaces (tip portions) which are inner portions in the spindle radial direction increases. Then, when passing through the guide surface 71g, the plurality of second projecting pieces 91c enter the recess 71h to elastically deform (restore) so that the distance between the tip surfaces is reduced in the recess 71h. In this case, the plurality of second projecting pieces 91c slide on the guide surface 71g of the hooking portion 71c, whereby alignment in the support shaft direction of the retaining member 91 with respect to the outer support shaft 71 is performed. On the other hand, when the diameter of the circle passing through the tip of the second protruding piece 91c is equal to or larger than the maximum diameter of the guide surface 71g, the second protruding piece 91c is elastically deformed during the movement. It is possible to move without doing it. In this case, it is also possible to guide the second projecting piece 91c by the guide surface 71g of the hooking portion 71c.

  In the above movement, the plurality of first projecting pieces 91b slide on the guide surface 71g after coming into contact with one end of the guide surface 71g of the hook portion 71c in the support shaft direction, as an example. Thus, the space between the end surfaces 91i, which are the inner portions in the spindle radial direction of the plurality of first projecting pieces 91b, is elastically deformed (bent). When passing through the guide surface 71g, the plurality of first projecting pieces 91b enter the recess 71h to elastically deform (restore) the space between the tip surfaces 91i in the recess 71h. Thus, the tip end surface 91i of the first protruding piece 91b faces the support surface 71f of the outer support shaft 71. At this time, the plurality of first projecting pieces 91b slide along the guide surface 71g of the hooking portion 71c, whereby alignment in the support shaft direction of the retaining member 91 with respect to the outer support shaft 71 is performed.

  As described above, in the retaining member 91 mounted on the outer support shaft 71, when a force to the other side (right side in FIG. 19) of the support shaft direction acts on the outer support shaft 71, the first projecting piece 91b. The front end surface 91i of the support shaft 71 is hooked (contacted) to the support surface 71f of the outer support shaft 71, the base portion 91a is hooked (contacted) to the surface 22d2 of the support portion 22d, and the first projecting piece 91b and the base portion 91a are support shaft Stuck in the direction. Thus, the movement of the outer support shaft 71 to the other side in the support shaft direction is limited. Further, the retainer 91 is supported by the support portion 71k in the support shaft radial direction by contacting the support portion 71k in the support shaft radial direction, and the movement in the support shaft radial direction is restricted. The second projecting piece 91c may be hooked on the surface 22d2 of the support portion 22d.

  As described above, in the present embodiment, the second protruding piece 91 c protrudes inward in the radial direction of the support shaft from the base portion 91 a and faces the outer support shaft 71 in the radial direction of the support shaft. Therefore, the second projecting piece 91 c is supported by the outer support shaft 71 in the support shaft radial direction, so that the movement of the retaining member 91 in the support shaft radial direction can be restricted.

  Further, in the present embodiment, the first protruding piece 91b and the second protruding piece 91c protrude from the inner portion in the support shaft radial direction of the base portion 91a. Therefore, the worker can easily grasp the base portion 91a.

  Further, in the present embodiment, the first projecting piece 91 b extends from the base portion 91 a toward the inside in the support shaft radial direction. In addition, the front end surface 91i of the first projecting piece 91b faces the support surface 71f directed to the outside in the support shaft radial direction as it goes to one side in the support shaft direction, and is along the support surface 71f. Therefore, the first projecting piece 91b is easily made long, and the first projecting piece 91b is not slippery in a state in which the first projecting piece 91b is in contact with the support surface 71f.

  Further, in the present embodiment, the first projecting piece 91b is provided with a curved portion 91m between the end surface 91i which is a portion of the first projecting piece 91b in contact with the outer support shaft 71 and the base portion 91a. It is done. Therefore, it is easy to bend the 1st projection piece 91b. Therefore, the retaining member 91 can be easily attached to the outer support shaft 71.

  As mentioned above, although the embodiment of the present invention was illustrated, the above-mentioned embodiment is an example to the last, and limiting the scope of the invention is not intended. The above embodiment can be implemented in other various forms, and various omissions, replacements, combinations, and changes can be made without departing from the scope of the invention. In addition, the specifications of each configuration, shape, etc. (structure, type, direction, shape, size, length, width, thickness, height, number, placement, position, material, etc.) are appropriately changed. Can be implemented. In addition, the configuration can be partially replaced and implemented among the plurality of embodiments.

  Further, in the above embodiment, the caliper 20 includes the inner housing portion 21 and the outer housing portion 22 and also includes the connecting portions 23 to 26 connecting these, and an example in which these are integrally formed will be described. However, it is not limited to this. For example, the present invention may be carried out by adopting a caliper in which the inner housing portion and the outer housing portion are divided into two in the rotor axial direction and these are connected by a plurality of connection bolts.

  In the above embodiment, three cylinders are respectively formed on the inner housing portion 21 and the outer housing portion 22 of the caliper 20. However, the inner housing portion and the outer housing portion of the caliper are implemented. The number of cylinders formed in and the number of pistons assembled to this may be three or more.

  Reference Signs List 1 disc brake device 22d support portion (target object) 22d1 opening portion 22d2 surface 71 outer support shaft (shaft member) 71b main body portion 71c hook portion 71d intervening portion 71e ... Support part, 71f ... Support surface, 71g ... Guide surface, 71h ... Concave part, 71i ... Side surface, 71j ... End part, 71k ... Support part, 91 ... Retention tool, 91a ... Base part, 91b ... First projection piece 91c: second projecting piece, 91e: convex portion, 91f: opening portion, 91h: curved portion, 91i: tip surface, 91m: curved portion, Ax: axial center.

Claims (7)

To the other side of the axial direction in a state where the shaft member provided with a recess on the side surface is disposed to penetrate the object and the recess is positioned on one side in the axial direction of the shaft member in the object A retaining member for restricting the movement of the shaft member of
And the base
A plurality of first projecting pieces protruding from the base portion along the axial direction and spaced apart from each other around the axial center of the shaft member;
The first projecting piece and a plurality of second projecting pieces alternately disposed around the axial center, and projecting from the base portion and spaced apart from each other about the axial center;
Equipped with
The first projecting piece and the second projecting piece project from the base portion to the other side in the axial direction,
The first projecting piece enters the recess,
Prior Symbol second projecting piece, facing the one side portion of the axial direction of said object, retaining member. The shaft member includes a main body portion, a hook portion provided on one side in the axial direction of the main body portion at a distance from the main body portion, and an intervening portion interposed between the main body portion and the hook portion. Have and
The concave portion is provided between the main body portion and the hook portion;
When the retaining member is moved from the one side in the axial direction of the shaft member toward the other side in the axial direction, the plurality of first projecting pieces may include the plurality of first protrusions at the hooking portion. 2. The retaining member according to claim 1, wherein the distance between the radially inner portions of the shaft member in the protruding piece is increased, and the distance between the inner portions is reduced in the recess. The retaining member according to claim 1 or 2 , wherein the first projecting piece and the second projecting piece extend from an outer portion of the base portion in the radial direction of the shaft member. The removal according to any one of claims 1 to 3, wherein the base portion is provided with an opening portion into which a support portion provided at an end portion on one side in the axial direction of the shaft member is inserted. Stop. The retainer according to any one of claims 1 to 4 , wherein the base portion has a convex portion. The stopper according to any one of claims 1 to 5 , wherein three of the first projecting pieces are positioned at substantially equal intervals around the axis. The disc brake apparatus provided with the securing tool as described in any one of Claims 1-6 .

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