WO2019131676A1

WO2019131676A1 - Floating-caliper-type disc brake device

Info

Publication number: WO2019131676A1
Application number: PCT/JP2018/047652
Authority: WO
Inventors: 吉川　和宏
Original assignee: 曙ブレーキ工業株式会社
Priority date: 2017-12-28
Filing date: 2018-12-25
Publication date: 2019-07-04
Also published as: JP2019120288A; JP6949707B2; TW201930744A

Abstract

A floating-caliper-type disc brake device (100) that comprises: first brake shoes (11) and second brake shoes (13) that are respectively held by brake shoe holding parts (39, 41) of a first caliper arm (19) and a second caliper arm that are formed to straddle a wheel at a caliper body (17) that is slidably supported by a support body (15); pressing mechanisms (23) that drive the first brake shoes (11) toward the wheel; and electrically driven interval adjustment mechanisms (25) that are provided to brake shoe holding parts (39) for adjusting the interval between the first brake shoe (11) and second brake shoe (13) and a disc rotor (36) to a prescribed set value during brake release.

Description

Floating caliper type disc brake device

The present invention relates to a floating caliper type disk brake device.

As a floating caliper type disk brake device for railways, a disk brake device is known in which an adjuster mechanism (a gap adjusting mechanism) is integrally incorporated in a wheel support portion (control wheel holder holding portion) of a caliper arm (patent document 1).
This adjuster mechanism keeps the stroke of the piston (pressing member of the pressing mechanism) which is built in the brake supporting member supporting portion and hydraulically driven when the linings of the first brake shoe and the second brake shoe wear out. , And automatically adjust the gap between the control rotor and the disk rotor.

Japanese Patent Application Laid-Open No. 11-230209

In a hydraulically driven railway disc brake device, a residual pressure is generated in the piston cylinder even at the time of brake release, and a piston pressing force is generated. The term "at the time of brake release" as used herein means releasing the generated hydraulic pressure. Therefore, it is necessary for the above-mentioned adjuster mechanism to overcome the piston pressing force due to the residual pressure in the piston cylinder, and to maintain a predetermined gap between the control wheel and the disk rotor at the time of brake release. Therefore, the adjuster mechanism using the friction spring and the rod as the main components requires a large friction force in its configuration, and has a complicated structure. And since this friction force works on the reducing side with respect to the braking force at the time of gap adjustment, in order for the disc brake device to always generate stable braking force, it is necessary to accurately adjust the friction force. there were.
Further, at the time of pad replacement, it is necessary to return the adjuster mechanism to the initial position one by one, and maintenance is not good.

The present invention has been made in view of the above circumstances, and an object thereof is to maintain a predetermined gap between a controller and a disk rotor by a gap adjusting mechanism having a simple structure and to improve maintainability. It is an object of the present invention to provide a floating caliper type disc brake device that can

The above object of the present invention is achieved by the following constitution.
(1) a support,
A caliper body slidably supported on the support via a slide pin;
A first caliper arm and a second caliper arm formed across the wheels on the caliper body;
A first control wheel and a second control wheel held by the control wheel holding portions of the first caliper arm and the second caliper arm, respectively;
A pressing mechanism provided in the brake control member holding portion of the first caliper arm for driving the first brake member toward the wheel;
A gap adjusting mechanism provided in the brake disc holder holding portion and electrically driven to adjust the gap between the first brake disc and the second brake disc and the disc rotor to a predetermined set value at the time of brake release;
Floating caliper type disc brake device with.

According to the floating caliper type disk brake device of the above configuration (1), the gap adjusting mechanism provided in the brake control member holding portion of the first caliper arm is electrically driven by the electric motor. Therefore, by controlling the rotation of the electric motor, the clearances between the first and second control rotors and the disc rotor can be adjusted to predetermined set values, and the clearance adjustment mechanism can be made into a simple structure. it can. In addition, the rotation of the electric motor can be controlled for each gap adjustment mechanism, and the gaps can be returned to the initial position for all calipers collectively or for each optional caliper.

(2) The floating caliper type disk brake device according to (1) above,
It further comprises a holding member configured to slidably hold the first control wheel in the wheel rotational axis direction and disposed at an end of the control wheel holding portion of the first caliper arm,
The clearance adjustment mechanism drives the holding member.

According to the floating caliper type disk brake device of the configuration of the above (2), the first control wheel and the second control wheel, which are formed long along the arc of the wheel circumferential direction, are used on both sides of the wheel during braking. Long longitudinal ends are slidably supported by holding members perpendicular to the side of the wheel so as to approach and depart parallel to the side. That is, the first control wheel is held slidably in the wheel rotational axis direction by the holding member as the anchor pin. Therefore, the gap adjusting mechanism is configured to drive the holding member, so that the gap between the first control wheel and the disk rotor can be adjusted in the wheel rotational axis direction.

(3) The floating caliper type disk brake device according to (2) above,
The holding member is slidably supported in the wheel rotation axis direction with respect to an anchor block fixed to an end portion of the brake pad retaining portion of the first caliper arm.

According to the floating caliper type disk brake device of the above configuration (3), the holding member is supported as the anchor pin so as to be slidable in the wheel rotational axis direction with respect to the anchor block. The anchor block is fixed to the end of the brake control holder of the first caliper arm. The anchor pins are usually preassembled into anchor blocks. Therefore, the pre-assembly of the clearance adjustment mechanism is also possible. Therefore, in this disk brake device, the gap adjusting mechanism is integrated into the anchor block assembly, and the mounting is made the same size as the current product, so that it is possible to select the gap adjusting mechanism as required.

(4) The floating caliper type disk brake device according to any one of (1) to (3) above,
The pressing mechanism is hydraulically driven.

According to the floating caliper type disk brake device of the above configuration (4), the pressing mechanism for driving the first control wheel toward the wheel at the time of braking is hydraulically driven by the hydraulic system device, and the first brake is released at the time of brake release. A gap adjusting mechanism for adjusting the gap between the control wheel and the disk rotor is electrically driven by the electrical system device. As a result, the risk that the pressing mechanism and the gap adjusting mechanism simultaneously malfunction can be reduced, and the reliability of the disk brake device can be improved.

(5) In the floating caliper type disk brake device according to (4), the gap adjusting mechanism drives a pressing member of the pressing mechanism that is hydraulically driven.

According to the floating caliper type disk brake device of the above configuration (5), the gap adjusting mechanism for adjusting the gap between the first control wheel and the disk rotor at the time of brake release drives the first control wheel when pressing. Drive the pressing member of the pressing mechanism provided to Specifically, the pressing member is a piston provided in a pressing mechanism hydraulically driven as a service brake. Therefore, the gap adjusting mechanism can apply a stable adjusting force by directly driving the piston of the pressing mechanism that presses the first control wheel.

(6) The floating caliper type disk brake device according to (3) above,
The gap adjusting mechanism includes a cylindrical bottomed cylindrical holding member, a nut rotatably accommodated in the holding member in a relatively non-rotatable manner in the axial direction, and a screw whose front end side is screwed to the nut; It has a spring member which biases the holding member in a direction away from the wheel with respect to the nut, and an electric motor which rotationally drives the screw.

According to the floating caliper type disk brake device of the above configuration (6), when the electric motor is driven to rotate, the screw is rotated. The screw rotates with respect to the nut accommodated non-rotatably relative to the holding member (anchor pin). The nut held in a non-rotatable manner relative to the holding member slides in the wheel rotation axis direction (the direction along the wheel rotation axis) by the rotation of the screw engaged therewith. By the sliding of the nut in the wheel rotational axis direction, the holding member drives the first brake element along the wheel rotational axis direction, and the gap between the first brake element and the second brake element and the disc rotor is adjusted.
That is, the gap adjusting mechanism is configured of a screw rotationally driven by the electric motor, a nut accommodated in the holding member, and a spring member urging the holding member with respect to the nut in a direction away from the wheel. Therefore, the gap adjusting mechanism can perform the gap adjustment only by controlling the rotation of the electric motor, and a large friction force is not necessary at the time of the gap adjustment, so the disc brake device can always generate a stable braking force. .
Further, the spring member biases the holding member against the nut in a direction away from the wheel, so that the remaining pressure acting in the piston cylinder of the hydraulically driven pressing mechanism is directed to the outer surface of the opposing disc rotor. Can resist the pressing member (piston) of the pressing mechanism to be moved. Therefore, by setting the spring constant of the spring member appropriately, it is possible to easily maintain a predetermined gap between the control wheel and the disk rotor.

(7) The floating caliper type disk brake device according to (5) above,
The gap adjusting mechanism includes a cylindrical bottomed cylindrical pressing member, a nut rotatably accommodated in the pressing member in a relatively non-rotatable manner in the axial direction, and a screw having a tip end screwed on the nut; It has a spring member which biases the pressing member in a direction away from the wheel with respect to the nut, and an electric motor which rotationally drives the screw.

According to the floating caliper type disk brake device of the above configuration (7), when the electric motor is rotationally driven, the screw is rotated. The screw rotates with respect to the nut housed non-rotatably relative to the pressing member (piston). The nut held in a relatively non-rotatable manner by the pressing member slides in the wheel rotational axis direction by the rotation of the screw engaged therewith. By the sliding of the nut in the wheel rotational axis direction, the pressing member drives the first brake element along the wheel rotational axis direction to adjust the gap between the first brake element and the second brake element and the disc rotor.
That is, the gap adjusting mechanism is configured of a screw rotationally driven by the electric motor, a nut accommodated in the pressing member, and a spring member biasing the pressing member in a direction away from the wheel with respect to the nut. Therefore, the gap adjusting mechanism can perform the gap adjustment only by controlling the rotation of the electric motor, and a large friction force is not necessary at the time of the gap adjustment, so the disc brake device can always generate a stable braking force. .
Further, the spring member biases the pressing member (piston) in the direction away from the wheel with respect to the nut, whereby the outside of the disc rotor opposed by the residual pressure acting in the piston cylinder of the hydraulically driven pressing mechanism. It is possible to resist the pressing member that is moving toward the side surface. Therefore, by setting the spring constant of the spring member appropriately, it is possible to easily maintain a predetermined gap between the control wheel and the disk rotor.

(8) The floating caliper type disk brake device according to (6) above,
The screw is disposed so as to be rotatable relative to the anchor block and immovable in the wheel rotation axis direction.

According to the floating caliper type disk brake device of the above configuration (8), when the screw is rotationally driven by the electric motor, the holding member (anchor pin) is driven back and forth in the wheel rotational axis direction with respect to the anchor block. The first wheel can be moved relative to the outer surface of the disk rotor.

(9) The floating caliper type disk brake device according to (7) above,
The screw is disposed so as to be relatively rotatable with respect to the wheel holding portion and immovable in the wheel rotational axis direction.

According to the floating caliper type disk brake device of the above configuration (9), when the screw is rotationally driven by the electric motor, the pressing member (piston) is driven to move back and forth in the wheel rotational axis direction with respect to the control wheel holder. The first wheel can be moved relative to the outer surface of the disk rotor.

According to the floating caliper type disk brake device according to the present invention, it is possible to maintain a predetermined gap between the control rotor and the disk rotor by the gap adjusting mechanism having a simple structure, and to improve maintainability. it can.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the modes for carrying out the invention described below (hereinafter referred to as "embodiments") with reference to the attached drawings. .

FIG. 1 is a perspective view of a disc brake device according to a first embodiment of the present invention. FIG. 2 is a side view of the disc brake device shown in FIG. 1 as viewed from the support side. FIG. 3 is a side view in which a portion of the disc brake device shown in FIG. 1 is viewed from the side of the first brake shoe and the second brake shoe. FIG. 4 is an enlarged view of an essential part of FIG. 5 is an exploded perspective view of the second pressing mechanism shown in FIG. 4. FIG. 5 (a) is an exploded perspective view seen from the anchor block side, and FIG. 5 (b) is a disassembled view seen from the motor unit side It is a perspective view. FIG. 6 is an exploded perspective view of the anchor block shown in FIG. FIG. 7 is an exploded perspective view of the anchor block shown in FIG. FIG. 8 is a perspective view of a disk brake device according to a second embodiment of the present invention as viewed from the first caliper arm side. FIG. 9 is an exploded perspective view of the disk brake device shown in FIG. 8 as viewed from the second caliper arm side. FIG. 10 is an exploded perspective view of the conventional anchor block shown in FIG. FIG. 11 is an enlarged sectional view of an essential part of a disk brake device according to a third embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
First Embodiment
First, a first embodiment of the present invention will be described.
1 is a perspective view of a disc brake device 100 according to a first embodiment of the present invention, FIG. 2 is a side view of the disc brake device 100 shown in FIG. 1 viewed from the support 27 side, and FIG. FIG. 4 is an enlarged view of an essential part of FIG. 3, in which a portion of the disc brake device 100 as viewed from the side of the first brake element 11 and the second brake element 13 is cut away.
A floating caliper type disk brake device 100 according to a first embodiment of the present invention will be described by way of example for use in a railway vehicle disk brake. In addition to this, the disc brake device 100 can be suitably used, for example, as a brake device of various industrial drive devices that generate a braking force to a rotating member such as an elevator.

The disk brake device 100 according to the first embodiment includes the support 15, the caliper body 17, the first caliper arm 19 and the second caliper arm 21, the first control wheel 11 and the second control wheel 13, and the pressure. The mechanism 23 and the clearance adjustment mechanism 25 are included as main components.

The support 15 is supported by a support 27 coupled to a bogie frame (not shown). The support 15 has an upper cylindrical support 29 and a lower cylindrical support 31. The upper cylindrical support portion 29 and the lower cylindrical support portion 31 each include a slide pin 33.

The caliper body 17 is slidably supported by the support 15 via the slide pin 33 along the longitudinal direction (left and right direction in FIG. 2) of the slide pin 33. Furthermore, the caliper body 17 has a first caliper arm 19 and a second caliper arm 21.

The first caliper arm 19 and the second caliper arm 21 are formed on the caliper body 17 as parallel bifurcated arms so as to straddle the wheel 35. Each base 37 of the first caliper arm 19 and the second caliper arm 21 is supported on one end side and the other end side of the upper and lower slide pins 33. The first caliper arm 19 and the second caliper arm 21 serve as the control wheel holder 39 and the control wheel holder 41, respectively, on the opposite side of the base 37.

The first control wheel 11 and the second control wheel 13 are held by the control wheel holding portion 39 and the control wheel holding portion 41 of the first caliper arm 19 and the second caliper arm 21 via the control wheel guide 48 and the dovetail groove. . The first control wheel 11 and the second control wheel 13 are so-called brake pads, and the control wheel holding portion 39 and the control wheel holding portion 41 are opposed to the outer side surface of the disk rotor 36 attached to both side surfaces of the wheel 35. Attached to each. In the first embodiment, a structure in which the lining surface of these brake pads presses the disc rotor 36 to perform a braking operation will be described as an example. Of course, the disc brake device 100 may be configured to pinch the both sides of the wheel 35 directly for braking.

The pressing mechanism 23 and the gap adjusting mechanism 25 according to the first embodiment independently drive the first control wheel 11 toward the wheel 35 respectively. The pressing mechanism 23 and the gap adjusting mechanism 25 are provided in the wheel control unit 39 of the first caliper arm 19.
The pressing mechanism 23 hydraulically drives the first control wheel 11 toward the outer surface of the disk rotor 36. The piston 45, which is a pressing member of the pressing mechanism 23, has its tip end in contact with the brake pad guide 48, receives hydraulic pressure supply through the hydraulic pressure inlet 24 provided in the first caliper arm 19, and is directed to the disc rotor 36 side. By projecting, the first control wheel 11 is pressed against the outer surface of the disk rotor 36. The caliper body 17 is slidably supported by the support 15 along the longitudinal direction (left and right direction in FIG. 2) of the slide pin 33. The first control wheel 11 and the second control wheel 13 held by the control wheel holder holding portion 39 and the control wheel holding portion 41 of the first caliper arm 19 and the second caliper arm 21 via the control wheel guide 48 and the dovetail groove, Disc rotors 36 mounted on both sides of the wheel 35 are pinched from both sides. At this time, the wheel 35 is braked by the frictional force generated with the disk rotor 36.

The first brake element 11 and the second brake element 13 are composed of a lining 12 in contact with the disc rotor 36 and a back plate 14 fixed to the back of the lining 12. The back plates 14 are configured to be fitted into the dovetail grooves formed in the control wheel guide 48 from above and below.
Furthermore, the back plate 14 of the first control wheel 11 is sandwiched between the holding members 47 as a pair of upper and lower anchor pins, and the falling off from the dovetail groove is prevented. The back plate 14 of the second control wheel 13 whose clearance adjustment mechanism 25 is not configured is sandwiched between a pair of upper and lower anchor blocks 51 (see FIG. 9), and is inserted from the dovetail groove provided in the control wheel holder 41. Fallout is prevented.

The gap adjusting mechanism 25 according to the first embodiment is attached to each of the upper end and the lower end of the control child holding portion 39. The gap adjusting mechanism 25 electrically drives a holding member 47 disposed at an end of the brake support holder 39 of the first caliper arm 19 to hold the first brake shoe 11 slidably in the wheel rotational axis direction. That is, since the holding member 47 of the gap adjusting mechanism 25 in the first embodiment holds the first brake element 11 slidably in the wheel rotational axis direction, the upper and lower ends of the brake disc holding portion 39 in the first caliper arm 19 It is an anchor pin arranged in the section.

As shown in FIGS. 3 and 4, the holding member 47 is slidable along the wheel rotation axis direction with respect to anchor blocks 49 fixed to the upper and lower end portions of the brake pad holder 39 of the first caliper arm 19. Supported by A normal anchor block 51 which does not constitute the clearance adjustment mechanism 25 is provided at the upper and lower end portions of the wheel support holding portion 41 of the second caliper arm 21.

The clearance adjustment mechanism 25 according to the first embodiment adjusts the clearance between the first control wheel 11 and the second control wheel 13 and the disk rotor 36 to a predetermined set value (for example, 6 mm on both sides) at the time of brake release. The clearance adjustment mechanism is provided in the control rod holder 39 of the first caliper arm 19. The clearance adjusting mechanism 25 includes a bottomed cylindrical holding member 47, a nut 53 relatively non-rotatably and axially slidably housed in the holding member, and a screw 55 whose front end side is screwed with the nut 53. A spring member 88 biasing the holding member 47 in a direction away from the wheel 35 with respect to the nut 53, and an electric motor 57 driving the screw 55 as main components. The clearance adjusting mechanism 25 operates so as to keep the moving amount of the piston 45 in the pressing mechanism 23 constant when the linings of the first wheel 11 and the second wheel 13 wear.

5 is an exploded perspective view of the gap adjusting mechanism 25 shown in FIG. 4. FIG. 5 (a) is an exploded perspective view seen from the anchor block 49 side, and FIG. 5 (b) is seen from the motor unit 59 side. It is a disassembled perspective view.
The gap adjusting mechanism 25 according to the first embodiment includes a motor unit 59 and an anchor block 49. The rotation of the drive shaft 58 of the electric motor 57 is decelerated by the reduction gear 61 and the motor unit 59 is output from the output shaft 63. The motor unit 59 is integrally fixed to the anchor block 49 by the fixing screw 65. The motor unit 59 is fixed to the anchor block 49 so as to be non-rotatably coupled to the screw 55 whose output shaft 63 is accommodated in the anchor block 49. That is, the motor unit 59 inputs the driving force of the electric motor 57 to the screw 55 in the anchor block 49 via the output shaft 63.

6 is an exploded perspective view of the anchor block 49 shown in (a) of FIG. 5, and FIG. 7 is an exploded perspective view of the anchor block 49 shown in (b) of FIG.
As shown in FIGS. 6 and 7, the anchor block 49 has a block body 67. In the block main body 67, bolt holes 71 for inserting a pair of bolts 69 for fixing to the brake pad holder 39 are bored. Further, the block main body 67 has a cylindrical portion 73 coaxially accommodating the holding member 47, the nut 53, the screw 55 and the like described above.

The anchor block 49 is provided in the cylindrical portion 73 from the side of the control rod holding portion 39, the holding member 47, the retaining ring 77, the heat shield plate 75, the boot 79, the washer 81, the retaining ring 83, the bush 85, the nut 53, the spring member A spring receiver 84, a snap ring 86, a screw 55, a thrust bearing 87, an O-ring 89, a bush 91, and a snap ring 93 are coaxially accommodated. The members such as the holding member 47, the nut 53, and the screw 55 are assembled as shown in FIG.

The holding member 47 as an anchor pin is a member that receives a braking torque. The holding member 47 is accommodated in the cylindrical portion 73 of the anchor block 49 fixed to the upper and lower end portions of the control rod holding portion 39 of the first caliper arm 19. The holding member 47 is slidably supported along the wheel rotation axis direction via the bush 85. The gap between the holding member 47 and the cylindrical portion 73 is closed by the boot 79.

The tip end portion 47 a of the holding member 47 protruding from the cylindrical portion 73 of the anchor block 49 abuts on the back surface of the lining 12. Further, the neck portion 47 b recessed on the outer periphery on the tip end side of the holding member 47 is fitted to the fitting holes 48 a and 48 b formed in the brake control device 48 and fixed to the brake control device 48. The tip portion 47a protruding from the

fitting holes

48a and 48b is configured to sandwich the back plate 14 from above and below.

In the nut 53 accommodated in the bottomed cylindrical holding member 47, a plurality of engaging projections 53a formed on a flange portion protruding from the tip of the outer peripheral portion engage with the spline grooves 47c in the holding member 47. Thus, relative rotation to the holding member 47 is not possible, and the holding member 47 is axially slidable. Further, the male screw 55 a of the screw 55 is screwed into the female screw 53 b of the nut 53.
The holding member 47 is biased away from the wheel 35 with respect to the nut 53 by a spring member 88 and a spring receiver 84. The spring member 88 and the spring receiver 84 are interposed between the base of the engagement projection 53 a of the nut 53 and the snap ring 86 locked in the holding member 47.

The screw 55 housed in the anchor block 49 has a thrust bearing 87 interposed between the flange 55 b and the bottom wall of the cylindrical portion 73. Further, a bush 91 is interposed between the base of the screw 55 penetrating the bottom wall of the cylindrical portion 73 and the bottom wall of the cylindrical portion 73. Further, the base of the screw 55 penetrating the bottom wall of the cylindrical portion 73 is prevented by the retaining ring 93. Therefore, the screw 55 is arranged so as to be rotatable relative to the anchor block 49 and immovable in the wheel rotational axis direction. Then, the base of the screw 55 that penetrates the bottom wall of the cylindrical portion 73 is serrated with the output shaft 63 of the motor unit 59, and is relatively non-rotatably connected.

That is, in the clearance adjustment mechanism 25, when the screw 55 is rotationally driven by the electric motor 57, the holding member 47 which is an anchor pin is driven to advance and retract in the wheel rotational axis direction with respect to the anchor block 49. The first control wheel 11 can be moved relative to the outer surface of the disk rotor 36 via the same.

Next, the operation of the above configuration will be described.
In the floating caliper type disk brake device 100 according to the first embodiment, the pressing mechanism 23 is hydraulically driven at the time of braking. When the pressing mechanism 23 is driven, first, the first brake element 11 presses the outer surface of the disk rotor 36 of the opposing wheel 35 from the direction along the wheel rotation axis. The first control wheel 11 which has pressed the disk rotor 36 of the wheel 35 receives a reaction force from the disk rotor 36. The reaction force causes the caliper body 17 to move in the direction along the slide pin 33 via the brake control member holding portion 39 and the first caliper arm 19. When the caliper body 17 moves, the second brake 13 held by the brake holder 41 of the second caliper arm 21 presses the outer surface of the disc rotor 36 of the opposing wheel 35. As a result, the wheel 35 is braked by being pinched by the first restrictor 11 and the second restrictor 13 from both sides in the wheel rotational axis direction. The holding member 47 of the gap adjusting mechanism 25 connected to the brake disc guide 48 is a spring member 88 when the first brake disc 11 moves in the direction to press the outer surface of the disc rotor 36 by the pressing mechanism 23. It moves toward the wheel 35 together with the first control wheel 11 against the biasing force.

On the other hand, at the time of brake release, the gap adjusting mechanism 25 is appropriately electrically driven in the disk brake device 100 according to the first embodiment. When driven, the gap adjustment mechanism 25 provided in the brake pad holder 39 of the first caliper arm 19 rotates the electric motor 57 to rotate the screw 55. When the screw 55 rotates, the nut 53 moves along the axial direction of the screw 55 and moves the holding member 47 in the protruding direction.

When the holding member 47 protrudes, first, as in the case of the pressing mechanism 23, the first brake element 11 presses the outer surface of the disc rotor 36 of the opposing wheel 35 in the wheel rotational axis direction. The first control wheel 11 which has pressed the disk rotor 36 of the wheel 35 receives a reaction force from the disk rotor 36. The reaction force causes the caliper body 17 to move in the direction along the slide pin 33 via the brake control member holding portion 39 and the first caliper arm 19. When the caliper body 17 moves, the second brake 13 held by the brake holder 41 of the second caliper arm 21 abuts on the outer surface of the disk rotor 36 of the opposing wheel 35. As a result, the first control wheel 11 and the second control wheel 13 have no gap with respect to the wheel 35.

When the first brake element 11 and the second brake element 13 abut against the outer surface of the disc rotor 36 of the facing wheel 35, the drive of the electric motor 57 is stopped. The female screw 53b of the nut 53 and the male screw 55a of the screw 55 are screwed with each other by a nonreversible screw, and therefore, when a pressing force is applied to the nut 53 from the first control wheel 11, the screw 55 is not rotated. .

In this state, when the electric motor 57 is reversely rotated by a predetermined amount, the first brake element 11 driven backward can open a predetermined gap between the opposing wheel 35 and the outer surface of the disk rotor 36. Therefore, the gap adjustment mechanism 25 can perform the gap adjustment only by controlling the rotation of the electric motor 57. The timing for operating the clearance adjustment mechanism 25 may be any time as long as the brake is released, and may be each time the brake is released immediately after the disc brake device 100 has been actuated, or may be released after a predetermined time has elapsed.

When the gap adjusting mechanism 25 is returned to the initial position at the time of pad replacement, the electric motor 57 is reversely rotated to drive the holding member 47 backward with the nut 53. Then, the gap between the first wheel 11 and the second wheel 13 and the outer surface of the disk rotor 36 of the opposite wheel 35 is expanded, and the first wheel 11 and the second wheel 13 are returned to the initial position.

In the disk brake device 100 according to the first embodiment, the gap adjusting mechanism 25 provided in the brake pad retaining portion 39 of the first caliper arm 19 is electrically driven by the electric motor 57. Therefore, only by controlling the rotation of the electric motor 57, it is possible to adjust the gap between the first brake disc 11 and the second brake disc 13 and the disc rotor 36 to a predetermined set value, and the gap adjusting mechanism 25 is simple. It can be structured. In addition, the rotation of the electric motor 57 can be controlled for each gap adjustment mechanism 25, and all the calipers can be returned to the initial position collectively or collectively for any caliper.

Further, in the disk brake device 100 of the first embodiment, the first brake element 11 and the second brake element 13 formed in a long shape along the arc of the wheel circumferential direction are side surfaces of both sides of the wheel 35 at the time of braking. The long longitudinal direction both ends (upper and lower ends) are slidably supported by holding members 47 perpendicular to the side surface of the wheel 35 so as to approach and separate in parallel to the above. That is, the first control wheel 11 is slidably held in the wheel rotational axis direction by the holding member 47 as an anchor pin. Therefore, the gap adjusting mechanism 25 is configured to drive the holding member 47, so that the gap between the first control wheel 11 and the disk rotor 36 can be adjusted in the wheel rotational axis direction.

Further, in the disk brake device 100 of the first embodiment, the holding member 47 is supported as an anchor pin so as to be slidable in the wheel rotational axis direction with respect to the anchor block 49. The anchor blocks 49 are fixed to the upper and lower ends of the control rod holder 39 of the first caliper arm 19. An anchor pin 97 for slidably holding the first control wheel 11 in the wheel rotational axis direction is usually preassembled into an anchor block 95 (see FIGS. 9 and 10). Therefore, pre-assembly of the gap adjusting mechanism 25 is also possible. Therefore, in the disc brake device 100, the gap adjusting mechanism 25 is integrated into the anchor block assembly, and the mounting is made the same size as the current product, so that the gap adjusting mechanism 25 can be selected as needed.

Further, in the disk brake device 100 of the first embodiment, the pressing mechanism 23 for driving the first brake element 11 toward the wheel 35 at the time of braking is hydraulically driven by the hydraulic system device, and the first brake is released when the brake is released. A gap adjusting mechanism 25 for adjusting the gap between the rotor 11 and the disk rotor 36 is electrically driven by the electrical system device. Thereby, the pressing mechanism 23 and the gap adjusting mechanism 25 can reduce the risk of malfunction at the same time, and improve the reliability of the disc brake device 100.

Further, in the disk brake device 100 of the first embodiment, when the electric motor 57 is rotationally driven, the screw 55 is rotated. The screw 55 rotates with respect to the nut 53 accommodated so as not to be rotatable relative to the holding member 47 (anchor pin). The nut 53 held so as not to be relatively rotatable by the holding member 47 slides in the wheel rotational axis direction by the rotation of the screw 55 engaged with it. By the sliding of the nut 53 in the wheel rotational axis direction, the holding member 47 drives the first brake element 11 along the wheel rotational axis direction, and the first brake element 11 and the second brake element 13 and the disc rotor 36 Adjust the gap.

That is, the gap adjusting mechanism 25 is a screw 55 rotationally driven by the electric motor 57, a nut 53 accommodated in the holding member 47, and a spring urging the holding member 47 away from the wheel 35 with respect to the nut 53. And a member 88. Therefore, the gap adjusting mechanism 25 can perform the gap adjustment only by controlling the rotation of the electric motor 57, and since the large friction force is not necessary at the time of the gap adjustment, the disc brake device 100 always generates a stable braking force. be able to.

In addition, the spring member 88 biases the holding member 47 against the nut 53 in a direction away from the wheel 35, so that the disc opposed by the residual pressure acting in the piston cylinder 40 of the hydraulically driven pressing mechanism 23 It is possible to resist the piston 45 of the pressing mechanism 23 which is going to move towards the outer surface of the rotor 36. Therefore, by setting the spring constant of the spring member 88 appropriately, it is possible to easily maintain the predetermined gap between the first control wheel 11 and the second control wheel 13 and the disk rotor 36.

As described above, according to the disk brake device 100 of the first embodiment, the predetermined gap between the first brake disc 11 and the second brake disc 13 and the disc rotor 36 is obtained by the gap adjusting mechanism 25 having a simple structure. While being maintainable, maintainability can be improved.

Furthermore, in the disk brake device 100 according to the first embodiment, the pair of clearance adjustment mechanisms 25 is provided at the upper end and the lower end of the control rod holder 39, so the first control wheel 11 is against the side surface of the wheel 35. It can be approached and separated with high parallelism.

Second Embodiment
Next, a second embodiment of the present invention will be described.
8 is a perspective view of the disc brake device 200 according to the second embodiment of the present invention as viewed from the first caliper arm 19 side, and FIG. 9 is a view of the disc brake device 200 shown in FIG. 8 as viewed from the second caliper arm 21 side. It is a disassembled perspective view. In the second embodiment, the same components as those of the first embodiment are designated by the same reference numerals and their description will not be repeated.

In the disk brake device 200 according to the second embodiment, as shown in FIGS. 8 and 9, one gap adjusting mechanism 25 is attached only to the upper end of the control / roller holding portion 39. That is, in the disc brake device 200, the clearance adjustment mechanism 25 is not attached to the lower end of the control rod holder 39. In the disc brake device 200, an anchor block 95 provided with an anchor pin 97 is attached to the lower end of the control wheel holder 39. The other configuration is the same as that of the disk brake device 100 of the first embodiment.

FIG. 10 is an exploded perspective view of the anchor block 95 of the conventional configuration shown in FIG.
The anchor block 95 restricts the movement of the wheel holding portion 39 in the wheel rotational direction, which occurs during braking. The anchor block 95 has a block body 99. In the block main body 99, bolt holes 71 for inserting a pair of bolts 69 for fixing to the brake disc holder holding portion 39 are bored. Further, the block main body 99 has a cylindrical portion 101 coaxially accommodating the anchor pin 97 and the like.

The anchor block 95 is, as shown in FIG. 10, in the cylindrical portion 101, from the side of the control rod holding portion, the anchor pin 97, the O ring 103, the retaining ring 105, the heat shield plate 107, the boot 109, the washer 111, the retaining ring A bush 115, a retaining ring 117, an O-ring 119, a closing plate 121, and a cap 123 are coaxially accommodated.

According to the disc brake device 200 according to the second embodiment, since only one gap adjusting mechanism 25 is provided, the disc brake device 200 can be manufactured with a simple structure, light weight, and low cost.

Third Embodiment
Next, a third embodiment of the present invention will be described.
FIG. 11 is an enlarged sectional view of an essential part of a disc brake device 300 according to a third embodiment of the present invention. In the third embodiment, the same components as those of the first embodiment are designated by the same reference numerals and their description will not be repeated.
In the disk brake device 300 according to the third embodiment, as shown in FIG. 11, the gap adjusting mechanism 125 electrically drives a piston 129 which is a pressing member of the pressing mechanism 127 hydraulically driven at the time of braking.

The clearance adjusting mechanism 125 has a piston 129 which is a bottomed cylindrical pressing member, a nut 53 rotatably accommodated in the piston 129 in a relatively non-rotatable manner in the axial direction, and a nut 53 screwed at the tip end. A screw 55, a spring member 88 urging the piston 129 in a direction away from the wheel 35 with respect to the nut 53, and an electric motor 57 rotating the screw 55 are provided as main components.

In the disc brake device 300 according to the third embodiment, the gap adjusting mechanism 125 for adjusting the gap between the first brake element 11 and the disc rotor 36 at the time of brake release hydraulically drives the first brake element 11 at the time of braking. The piston 129 of the pressing mechanism 127 provided for the purpose of driving is electrically driven.
In the gap adjusting mechanism 125, the motor unit 59 is attached to the rear (rightward in FIG. 11) of the pressing mechanism 127 provided in the brake pad holder 39. The motor unit 59 of the third embodiment is integrally fixed to the brake control member holding portion 39. The motor unit 59 is fixed to the control wheel holder 39, so that the output shaft 63 is non-rotatably connected to the screw 55 in which the output cylinder 63 is accommodated in the piston cylinder 140 of the control wheel holder 39. That is, the motor unit 59 inputs the driving force of the electric motor 57 to the screw 55 in the piston cylinder 140 via the output shaft 63.

A piston 129 as a pressing member is a piston of the pressing mechanism 127 hydraulically driven at the time of braking, is accommodated in the piston cylinder 140 of the control child holder 39, and is slidably supported along the wheel rotation axis direction There is. A packing 130 seals the inner circumferential surface of the piston cylinder 140 and the outer circumferential surface of the piston 129.

The tip end of the piston 129 projecting from the piston cylinder 140 of the brake control member holding portion 39 is in contact with the brake control device guide 48 and receives the supply of the hydraulic pressure through the hydraulic pressure inlet 24 arranged in the first caliper arm 19 By projecting toward the rotor 36, the first control wheel 11 is pressed against the outer surface of the disk rotor 36.

The nut 53 accommodated in the bottomed cylindrical piston 129 is engaged with the spline groove in the piston 129 by engaging a plurality of engagement protrusions 53 a formed on a flange portion protruding from the tip of the outer peripheral portion. The piston 129 is non-rotatable relative to the piston 129 and axially slidable.
The piston 129 is biased by a spring member 88 and a spring receiver 84 in a direction away from the wheel 35 with respect to the nut 53. The spring member 88 and the spring receiver 84 are interposed between the base of the engagement projection 53 a of the nut 53 and the snap ring 86 locked in the piston 129.

The thrust bearing 87 is interposed between the flange 55 b and the bottom wall of the piston cylinder 140. Further, a bush 91 is interposed between the base of the screw 55 penetrating the bottom wall of the piston cylinder 140 and the bottom wall of the piston cylinder 140. Further, the base of the screw 55 which penetrates the bottom wall of the piston cylinder 140 is prevented by the retaining ring 93. Therefore, the screw 55 is disposed so as to be relatively rotatable with respect to the control rod holder 39 and immovable in the wheel rotational axis direction. Then, the base of the screw 55 which has penetrated the bottom wall of the piston cylinder 140 is serrated with the output shaft 63 of the motor unit 59 so as to be non-rotatably coupled.

That is, in the clearance adjustment mechanism 125, the piston 55 of the pressing mechanism 127, which is a pressing member, is driven to advance / retract in the wheel rotational axis direction with respect to the control rod holder 39 by the screw 55 being rotationally driven by the electric motor 57. The first control wheel 11 can be moved relative to the outer surface of the disk rotor 36 via the control wheel guide 48.

Next, the operation of the above configuration will be described.
In the floating caliper type disk brake device 300 according to the third embodiment, at the time of braking, the pressing mechanism 127 is hydraulically driven. When the pressing mechanism 127 is driven, the piston 129 moves in the direction approaching the wheel 35 against the biasing force of the spring member 88. Therefore, first, the first brake element 11 presses the outer surface of the disc rotor 36 of the facing wheel 35 from the direction along the wheel rotation axis. The first control wheel 11 which has pressed the disk rotor 36 of the wheel 35 receives a reaction force from the disk rotor 36. The reaction force causes the caliper body 17 to move in the direction along the slide pin 33 via the brake control member holding portion 39 and the first caliper arm 19. When the caliper body 17 moves, the second brake 13 held by the brake holder 41 of the second caliper arm 21 presses the outer surface of the disc rotor 36 of the opposing wheel 35. As a result, the wheel 35 is braked by being pinched by the first restrictor 11 and the second restrictor 13 from both sides in the wheel rotational axis direction.

On the other hand, at the time of brake release, the gap adjusting mechanism 125 is appropriately electrically driven in the disk brake device 300 according to the third embodiment. When driven, the gap adjustment mechanism 125 provided in the brake pad holder 39 of the first caliper arm 19 rotates the electric motor 57 to rotate the screw 55. When the screw 55 rotates, the nut 53 moves along the axial direction of the screw 55 and moves the piston 129 in the projecting direction.

When the piston 129 projects, first, as in the case of the pressing mechanism 127, the first brake element 11 presses the outer surface of the disc rotor 36 of the opposing wheel 35 in the wheel rotational axis direction. The first control wheel 11 which has pressed the disk rotor 36 of the wheel 35 receives a reaction force from the disk rotor 36. The reaction force causes the caliper body 17 to move in the direction along the slide pin 33 via the brake control member holding portion 39 and the first caliper arm 19. When the caliper body 17 moves, the second brake 13 held by the brake holder 41 of the second caliper arm 21 abuts on the outer surface of the disk rotor 36 of the opposing wheel 35. As a result, the first control wheel 11 and the second control wheel 13 have no gap with respect to the wheel 35.

When the electric motor 57 is reversely rotated by a predetermined amount from this state, the tip of the piston 129 driven backward with the nut 53 opens a predetermined gap between the opposite wheel 35 and the outer surface of the disk rotor 36 it can. Therefore, the gap adjusting mechanism 125 can perform the gap adjustment only by controlling the rotation of the electric motor 57.

Further, when the gap adjustment mechanism 125 is returned to the initial position at the time of pad replacement, the electric motor 57 is reversely rotated to drive the piston 129 backward with the nut 53. Then, the gap between the first wheel 11 and the second wheel 13 and the outer surface of the disk rotor 36 of the opposite wheel 35 is expanded, and the first wheel 11 and the second wheel 13 are returned to the initial position.

In the disc brake device 300 according to the third embodiment, the gap adjusting mechanism 125 for adjusting the gap between the first brake disc 11 and the second brake disc 13 and the disc rotor 36 at the time of brake release is the first brake disc at the time of braking. 11 drives a piston 129 of a pressing mechanism 127 provided for pressing and driving 11. Therefore, the gap adjusting mechanism 125 can apply a stable adjusting force by directly driving the piston 129 of the pressing mechanism 127 that presses the first brake element 11.

In the disc brake device 300 of the third embodiment, when the electric motor 57 is rotationally driven, the screw 55 is rotated. The screw 55 rotates with respect to the nut 53 housed non-rotatably with respect to the piston 129. The nut 53 held so as not to be relatively rotatable to the piston 129 slides in the wheel rotational axis direction by the rotation of the screw 55 engaged with it. The piston 129 drives the first brake element 11 along the wheel rotational axis direction by the sliding of the nut 53 in the wheel rotational axis direction, and the gap between the first brake element 11 and the second brake element 13 and the disc rotor 36 Adjust the

That is, the gap adjusting mechanism 125 includes a screw 55 rotationally driven by the electric motor 57 and a nut 53 accommodated in the piston 129, and a spring member 88 urging the piston 129 away from the wheel 35 with respect to the nut 53. It consists of Therefore, the clearance adjustment mechanism 125 can perform clearance adjustment only by controlling the rotation of the electric motor 57, and a large friction force is not necessary at the time of clearance adjustment, so the disc brake device 300 always generates a stable braking force. be able to.

In addition, the spring member 88 biases the piston 129 against the nut 53 in the direction away from the wheel 35, whereby the disc rotor opposed by the residual pressure acting in the piston cylinder 140 of the hydraulically driven pressing mechanism 127. The piston 129 can be resisted to move towards the outer surface of 36. Therefore, by setting the spring constant of the spring member 88 appropriately, it is possible to easily maintain the predetermined gap between the first control wheel 11 and the second control wheel 13 and the disk rotor 36.

That is, the clearance adjusting mechanism 125 is a pressing member by the electric motor 57 rotationally driving the screw 55 disposed so as to be relatively rotatable with respect to the control rod holder 39 and immovable in the wheel rotational axis direction. The piston 129 is driven to move forward and backward in the wheel rotational axis direction with respect to the brake control member holding portion 39, and the first brake control member 11 can be moved with respect to the outer surface of the one disk rotor 36.

As described above, according to the disk brake device 300 of the third embodiment, the predetermined gap between the first brake disc 11 and the second brake disc 13 and the disc rotor 36 is obtained by the gap adjusting mechanism 125 having a simple structure. While being maintainable, maintainability can be improved.

Here, the features of the embodiments of the floating caliper type disk brake device according to the present invention described above will be briefly summarized and listed below.
[1] a support (15),
A caliper body (17) slidably supported on the support (15) via a slide pin (33);
A first caliper arm (19) and a second caliper arm (21) formed on the caliper body (17) across the wheel (35);
A first control wheel (11) and a second control wheel (13) respectively held by the control wheel holding portions (39, 41) of the first caliper arm (19) and the second caliper arm (21);
And a pressing mechanism (23, 127) provided on the brake support portion (39) of the first caliper arm (19) to drive the first brake (11) toward the wheel (35) ,
Electric drive provided on the control wheel holding portion to adjust the gap between the first control wheel (11) and the second control wheel (13) and the disc rotor (36) to a predetermined set value at the time of brake release Clearance adjustment mechanism (25, 125), and
Floating caliper type disc brake device (100, 200, 300).
[2] The floating caliper type disk brake device (100, 200) according to the above [1], which
A holding member (47) disposed at an end of the brake support (39) of the first caliper arm (19) to hold the first brake (11) slidably in the wheel rotational axis direction. And further
The gap adjusting mechanism (25) drives the holding member (47).
[3] A floating caliper type disk brake device (100, 200) according to the above [2], which
The holding member (47) is slidably supported in the wheel rotational axis direction with respect to an anchor block (49) fixed to an end of the brake disc holding portion (39) of the first caliper arm (19) Be done.
[4] The floating caliper type disk brake device (100, 200, 300) according to any one of the above [1] to [3], which
The pressing mechanism (23, 127) is hydraulically driven.
[5] A floating caliper type disk brake device (300) according to the above [4], which
The clearance adjusting mechanism (125) drives a pressing member (piston 129) of the pressing mechanism (127) hydraulically driven.
[6] The floating caliper type disk brake device (100, 200) according to the above [2] or [3], which
The gap adjusting mechanism (25)
The bottomed cylindrical holding member (47);
A nut (53) accommodated in the holding member (47) so as to be relatively non-rotatable and axially slidable;
A screw (55) whose front end side is screwed into the nut (53); and a spring member (88) urging the holding member (47) away from the wheel (35) with respect to the nut (53). When,
And an electric motor (57) for rotationally driving the screw (55).
[7] A floating caliper type disk brake device (300) according to the above [5], which
The clearance adjustment mechanism (125)
The bottomed cylindrical pressing member (piston 129);
A nut (53) accommodated in the pressing member (piston 129) so as to be non-relatively rotatable and axially slidable;
A screw (55) whose tip end is screwed to the nut (53);
A spring member (88) urging the pressing member (piston 129) away from the wheel (35) with respect to the nut (53);
And an electric motor (57) for rotationally driving the screw (55).
[8] The floating caliper type disk brake device (100, 200) according to the above [6], which
The screw (55) is
It is disposed so as to be rotatable relative to the anchor block (49) and immovable in the wheel rotational axis direction.
[9] A floating caliper type disk brake device (300) according to the above [7], which
The screw (55) is
It is arranged so as to be relatively rotatable with respect to the control wheel holder (39) and immovable in the wheel rotational axis direction.

The present invention is not limited to the embodiments described above, and appropriate modifications, improvements, etc. are possible. In addition, the material, shape, size, number, arrangement location, and the like of each component in the embodiment described above are arbitrary and not limited as long as the present invention can be achieved.
The present application is also based on Japanese Patent Application (Japanese Patent Application No. 2017-254159) filed on December 28, 2017, the contents of which are incorporated herein by reference.

According to the floating caliper type disk brake device of the present invention, it is possible to maintain a predetermined gap between the control rotor and the disk rotor by the gap adjusting mechanism having a simple structure, and to improve maintainability. .

11 ... 1st control wheel 13 ... 2nd control wheel 15 ... Support body 17 ... Caliper body 19 ... 1st caliper arm 21 ... 2nd caliper arm 23 ... Pressing mechanism 25 ... Clearance adjusting mechanism 33 ... Slide pin 35 ... Wheel 39 ... Control wheel holding portion 47 ... holding member 49 ... anchor block 53 ... nut 55 ... screw 57 ... electric motor 100 ... disc brake device

Claims

A support,
A caliper body slidably supported on the support via a slide pin;
A first caliper arm and a second caliper arm formed across the wheels on the caliper body;
A first control wheel and a second control wheel held by the control wheel holding portions of the first caliper arm and the second caliper arm, respectively;
A pressing mechanism provided in the brake control member holding portion of the first caliper arm for driving the first brake member toward the wheel;
A gap adjusting mechanism provided in the brake disc holder holding portion for adjusting the gap between the first brake disc and the second brake disc and the disc rotor to a predetermined set value at the time of brake release;
Floating caliper type disc brake device with.
The floating caliper type disk brake device according to claim 1, wherein
It further comprises a holding member configured to slidably hold the first control wheel in the wheel rotational axis direction and disposed at an end of the control wheel holding portion of the first caliper arm,
The clearance adjustment mechanism drives the holding member.
The floating caliper type disk brake device according to claim 2, wherein
The holding member is slidably supported in the wheel rotation axis direction with respect to an anchor block fixed to an end portion of the brake pad retaining portion of the first caliper arm.
A floating caliper type disk brake device according to any one of claims 1 to 3, wherein
The pressing mechanism is hydraulically driven.
The floating caliper type disk brake device according to claim 4, wherein
The clearance adjusting mechanism drives a pressing member of the pressing mechanism that is hydraulically driven.
The floating caliper type disk brake device according to claim 3, wherein
The clearance adjustment mechanism
The bottomed cylindrical holding member;
A nut rotatably accommodated in the holding member so as to be relatively non-rotatable and axially slidable;
A screw whose tip end is screwed to the nut;
A spring member urging the holding member away from the wheel with respect to the nut;
And an electric motor for rotationally driving the screw.
The floating caliper type disk brake device according to claim 5, wherein
The clearance adjustment mechanism
The bottomed cylindrical pressing member;
A nut rotatably accommodated in the pressing member in a relatively non-rotatable manner in the axial direction;
A screw whose tip end is screwed to the nut;
A spring member urging the pressing member away from the wheel with respect to the nut;
And an electric motor for rotationally driving the screw.
The floating caliper type disk brake device according to claim 6, wherein
The screw is
It is arranged to be relatively rotatable with respect to the anchor block and immovable in the wheel rotational axis direction.
The floating caliper type disk brake device according to claim 7, wherein
The screw is
It is arranged so as to be relatively rotatable with respect to the control wheel holder and immovable in the wheel rotational axis direction.