JP6629266B2 - Brake caliper - Google Patents

Description

  The present invention relates to a brake caliper, and more particularly to an electric brake caliper.

  For example, in a disk brake device used for a vehicle such as an automobile, as a conventional brake caliper for stopping a disk-shaped brake rotor that rotates with wheels, for example, the one described in Patent Literature 1 shown in FIG. No. FIG. 1 is an exploded view showing the structure of the conventional brake caliper.

  As shown, the brake caliper 9 includes a first brake pad 921 and a second brake pad 922, a housing 91, and an operation mechanism 93.

  The housing 91 has a first frame portion 911 and a second frame portion 912 which are connected to each other and surround the in-frame space 90. The first braking pad 921 and the second braking pad 922 are slidably disposed on the first frame portion 911 side and the second frame portion 912 side in the in-frame space 90, respectively.

  The operating mechanism 93 is attached to two rod-shaped interlocking members 94 and the two rod-shaped interlocking members 94, and has a first brake pad 921 and a second brake pad 922, respectively. A first operating member 95 and a second operating member 96, two compression coil springs 97 respectively attached to the two rod-shaped interlocking members 94, a motor 99, and a first driving member which is rotationally driven by the motor 99. And a screw shaft 98 for operating the operating member 95 of the above.

  Each interlocking member 94 extends from the holding end 941 on the second frame 912 side of the housing 91 to the connection end 942 on the first frame 911 side, and The formed second through-hole 914 and the first through-hole 913 formed in the first frame portion 911 are inserted, and are slidably held in the housing 91 along the extending direction.

  On the other hand, the first operating member 95 is attached to each interlocking member 94 such that the attached first brake pad 921 is interposed between the corresponding brake rotor (not shown) and the first frame portion 911. It is slidably mounted along. The second operating member 96 is attached so that the attached second brake pad 922 is interposed between the corresponding brake rotor and the second frame portion 912, and is movable together with each interlocking member 94. I have. Each of the compression coil springs 97 is attached to each of the interlocking members 95 and urges the first and second operating members 95 and 96 to be separated from each other.

  Further, the first operating member 95 extends into the shaft hole 915 of the first frame portion 911 and is connected to the screw shaft 98, and the driven sleeve 952 operated by the screw shaft 98 and each of the interlocking members 94 Are interposed by the respective interlocking members 94 so as to be relatively movable with respect to, and extend so as to be slidably held by the respective first through holes 913 formed in the first frame portion 911. And two sleeve pipes 953.

  The screw shaft 98 extends along a predetermined axis L0 parallel to the extending direction of each interlocking member 94, and is held in a shaft hole 915 of the first frame portion 911. Further, the screw shaft 98 has a screw end 981 screwed with the driven sleeve 952 of the first operating member 31 in the space 90 within the frame of the housing 91, and a mounting end 982 opposite to the screw end 981. And

  The motor 99 is fixed to the connection end 942 of the interlocking member 94 and connected to the mounting end 982 of the screw shaft 98 to drive the screw shaft 98 to rotate about the axis L0. The first operating member 95 can be moved along the axis L0 by the threaded relationship between the first operating member 95 and the driven sleeve 952.

  According to this structure, the conventional brake caliper 9 is arranged such that the first brake pad 921 and the second brake pad 922 face the board surfaces on both sides of the board-shaped brake rotor that rotates together with the wheels of the vehicle. When installed, it can operate to stop the brake rotor.

  Specifically, an input operation is performed on the motor 99 so as to rotate the screw shaft 98 to move the first operating member 95 to the board surface on one side of the brake rotor, thereby performing the first operation. The first brake pad 921 on the member 95 is brought into contact with the board on one side. Then, by further driving the screw shaft 98 to press the first operating member 95 against the brake rotor, the motor 99 is separated from the board surface on the one side of the brake rotor and fixed to the motor 99. Moving together with the interlocking member 94 and the second operating member 96 to bring the second brake pad 922 of the second operating member 96 into contact with the board surface on the other side of the brake rotor to perform the first braking. The friction of the brake rotor with the contact of the pad 921 causes the brake rotor to stop, so that the wheels can be braked.

Taiwan Patent No. I468600

  However, in the conventional brake caliper 9, the extension direction of the screw shaft 98 and the time when the screw shaft 98 operates the first operating member 95 due to an error in manufacturing a member or abrasion generated each time the member is operated. The direction of the stress applied to the screw shaft 98 itself as a reaction force may not coincide. In such a state, the screw shaft 98 is pressed against the inner peripheral surface of the shaft hole 915 in the first frame portion 911 due to the stress, that is, extra stress is applied to the screw shaft 98 and the screw shaft 98 is applied. 98 may fail to withstand the stress and break.

  In view of the above problems, an object of the present invention is to provide a brake caliper that can extend the life of a member, particularly the life of a screw shaft that is driven to rotate by a motor and operates a brake pad.

  In order to achieve the above object, a brake caliper of the present invention rotates around a first axis and stops the rotation of a disk-shaped brake rotor having a first disk surface on one surface substantially perpendicular to the first axis. It is a brake caliper to be made. The brake caliper includes a first brake pad, a housing, and an operation mechanism. The first brake pad is configured to stop rotation of the board-shaped brake rotor by contacting the first board surface. The housing has a first frame portion disposed on the first board side of the brake rotor and adjacent to the first brake pad. The operating mechanism is arranged so as to be movable substantially parallel to the first axis, and a first operating member to which the first brake pad is connected, and a first operating member substantially parallel to the first axis. The first operating member extends along the second axis and one end is connected to the first operating member inside the housing, and the second operating axis of the first operating member is rotated by rotation about the second axis. A shaft held by the housing so as to be able to drive the movement along the axis, and the shaft can be rotationally driven to control the movement of the first operating member along the second axis. And driving means. The first operating member further includes a stress reducing unit configured to be swingable about a predetermined axis point on the second axis with respect to the first frame portion, whereby the shaft is provided. When the first operating member is driven to rotate and presses the first operating member against the first board surface of the brake rotor, the stress applied to the shaft is swung with respect to the first frame portion by the first operating member. Can be reduced.

  According to the above configuration, in the brake caliper of the present invention, the first operating member can swing about a predetermined axis point on the second axis with respect to the first frame portion of the housing. When the shaft is driven to rotate and the first operating member is pressed against the first board surface of the brake rotor to operate, the shaft is driven by the shaft. Since the applied stress is reduced by the swing of the first operating member with respect to the first frame portion, the stress caused by the stress generated between members such as the housing, the first operating member, and the shaft is reduced. Wear and damage can be effectively suppressed and their life can be extended.

It is an exploded perspective view showing the structure of the conventional brake caliper. FIG. 2 is a perspective view showing a state where the first embodiment of the brake caliper of the present invention is installed on a brake rotor. FIG. 1 is an exploded perspective view showing a structure of a brake caliper according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a non-operating state of the first embodiment of the brake caliper of the present invention. FIG. 2 is a cross-sectional view of a principal part of another viewpoint showing the first embodiment of the brake caliper of the present invention. FIG. 2 is a cross-sectional view showing an operation state of the first embodiment of the brake caliper of the present invention. FIG. 4 is a sectional view illustrating a second embodiment of the brake caliper of the present invention.

  Hereinafter, a first embodiment illustrating a brake caliper of the present invention will be described in detail with reference to FIGS. FIG. 2 is a perspective view showing a state where the first embodiment of the brake caliper of the present invention is installed on a brake rotor. FIG. 3 is an exploded perspective view showing a structure according to the first embodiment of the present invention. FIG. 4 is a sectional view showing a non-operating state of the first embodiment of the present invention. FIG. 5 is a cross-sectional view of a main part of another viewpoint showing the first embodiment of the present invention. FIG. 6 is a sectional view showing an operation state of the first embodiment of the present invention.

  As shown in FIG. 2, a brake caliper 100 according to the first embodiment of the present invention is for stopping rotation of a disk-shaped brake rotor 200 that rotates together with wheels in a vehicle disk brake device. The brake rotor 200 rotates about a first axis L1, rotates about a first axis L1, has a first board surface 210 that is substantially perpendicular to the first axis L1 on one surface, and A second board surface 220 is provided on the opposite side of the first board surface 210.

  As shown in FIG. 3, the brake caliper 100 according to the present embodiment includes a first brake pad 22 and a second brake pad 24, a housing 10, an operation mechanism 50, and a stress reducing unit 60.

  The first brake pad 22 and the second brake pad 24 are configured to stop the rotation of the board-shaped brake rotor 200 by being in contact with and sandwiching the first board face 210 and the second board face 220. (See FIG. 6).

  The housing 10 is disposed on the first board surface 210 side of the brake rotor 200 and adjacent to the first brake pad 22 and the first frame portion 11 is disposed on the second board surface 220 side of the brake rotor 200. A second frame portion 12 adjacent to the second brake pad 24. Further, as shown in FIG. 2, the first frame portion 11 and the second frame portion 12 are connected to each other, and a space in the frame for movably housing the first brake pad 22 and the second brake pad 24. 13 is defined.

  Further, the first frame portion 11 has a shaft hole 112 (FIG. 3) inserted by a shaft 44 (described later) extending along a second axis L2 (described later), and is substantially parallel to the second axis L2. And two first through-holes 113 which are respectively inserted by two interlocking members 33 (described later) extending to hold the respective interlocking members 33 slidably substantially parallel to the second axis L2. ing. On the other hand, a holding end portion 331 (described later) of each interlocking member 33 into which each first through hole 113 is inserted is slidably held in the second frame portion 12 in parallel with the second axis L2. Two second through holes 123 are opened.

  The operating mechanism 50 according to the present embodiment includes two interlocking members 33, a first operating member 31 and a second operating member 32, two elastic members 34, a shaft 44, a sleeve bearing 43, and a holding seat 41. , A retaining ring 45, a plurality of nuts 46, and a driving means 42.

  As shown in FIG. 4, each interlocking member 33 is connected from a holding end 331 on the second board surface 220 side of the brake rotor 200 to a connection on the first board surface 210 side substantially parallel to the first axis L1. It is a rod-shaped body that extends to the end 332 and is slidably mounted substantially parallel to the first axis L1 on the housing 10. The holding end 331 of each interlocking member 33 is formed to have a large diameter so as to protrude in the radial direction of the rod-shaped body, and the connection end 332 is formed with a thread on its outer peripheral surface.

  The first operating member 31 is attached to the connection end 332 side so as to be inserted into the interlocking member 33, is slidably held along the interlocking member 33 in the housing 10, and performs a first braking operation. The pad 22 is connected. Further, the first actuating member 31 is connected to the first brake pad 22 and is slidably inserted substantially parallel to the second axis L2 into each of the interlocking members 33. It has a driven sleeve 312 extending from the block 311 and two sleeve pipes 314 (FIG. 3).

  The driven sleeve 312 extends from the operation block 311 into the shaft hole 112 of the first frame portion 11, and can be moved along the second axis L2 together with the operation block 311 by rotation of the shaft 44 (described later). It is screwed to one end of the shaft 44.

  Each of the sleeve pipes 314 is inserted by each of the interlocking members 33 so as to be relatively movable along a second axis L2 (described later) with respect to each of the interlocking members 33, and is connected to the second axis L2. Each of the first through holes 113 formed in the first frame portion 11 is slidably held substantially parallel to each other, and is held.

  On the other hand, the second operating member 32 is inserted into each interlocking member 33 and attached to the holding end 331 side of the interlocking member 33 so as to be able to move together with each interlocking member 33, and the second brake pad 24 is It is connected. The second frame 32 is inserted into the second operating member 32 by the interlocking members 33, extends to the holding end portions 331, and can be moved together with the interlocking members 33. A guide sleeve 322 is formed to be held in each of the second through holes 123 formed in the second through hole 12.

  As each elastic member 34 in the present embodiment, a compression coil spring is used. Each elastic member 34 is attached to each interlocking member 33 and intervenes between the first operating member 31 and the second operating member 32, and separates the first operating member 31 and the second operating member 32. Continue to give the urging force. Therefore, the second operating member 32 is positioned at the holding end 331 of each interlocking member 33 and can move together with each interlocking member 33.

  Note that the number of the interlocking members 33, the number of the first through holes 113 and the second through holes 123 in the housing 10, the number of the sleeve pipes 314 in the first operating member 31, and the second operating The number of the guide sleeves 322 and the number of the elastic members 34 in the member 32 are not limited to the present embodiment, and may be further increased to improve the stability of the drive mechanism 50.

  As shown in FIG. 3, the shaft 44 extends along a second axis L2 substantially parallel to the first axis L1, and a screw portion 443 formed on one end side is provided inside the housing 10. The first operating member 31 is moved along the second axis L2 by rotation about the second axis L2, which is screwed to the driven sleeve 312 of the first operating member 31 in the space 13 within the frame. Is held in the shaft hole 112 of the housing 10 so that the can be driven. Further, the shaft 44 further includes a mounting portion 442 on the other end side opposite to the one end, and a ring portion 441 projecting in the outer peripheral direction of the second axis L2 between the screw portion 443 and the mounting portion 442. Have.

  As shown in FIG. 4, the sleeve bearing 43 is attached to the shaft 44 and holds the shaft 44 in the shaft hole 112 of the first frame 11. The sleeve bearing 43 has an annular bearing portion 432 that rotatably surrounds and holds the mounting portion 442 of the shaft 44 on the outer side opposite to the inner side facing the in-frame space 13 of the first frame portion 11. Extending from the bearing portion 432 into the shaft hole 112 of the first frame portion 11 and moving the ring portion 441 and the screw portion 443 of the shaft 44 and the passive sleeve 312 of the first operating member 31 collectively. And a surrounding cylindrical portion 431.

  The holding seat 41 is attached to the attachment portion 442 of the shaft 44 outside the first frame portion 11, is connected to the bearing portion 432 of the sleeve bearing 43, and is inserted through the connection end portion 332 of each interlocking member 33. ing. The retaining ring 45 is provided on the opposite side of the holding seat 41 from the side to which the sleeve bearing 43 is connected, and rotatably surrounds the mounting portion 442 of the shaft 44 to connect the holding seat 41 and the sleeve bearing 43 to the shaft 44. Position. Then, as shown in FIG. 2, each nut 46 is attached to the connection end 332 of each interlocking member 33, and holds the holding seat 41 from both the first frame 11 side and the driving unit 42 side. To fix to the connection end 332.

  As the driving means 42 in the present embodiment, a mechanism combining an electric motor and a speed reducer is used. As shown in FIG. 4, the driving unit 42 is connected to the motor frame 422 connected to the holding seat 41 fixed to the connection end 332 of each interlocking member 33, and from the motor frame 422 to the second axis L2. A motor shaft 421 that protrudes along and is inserted into the mounting portion 442 of the shaft 44 and that can control the movement of the first operating member 31 along the second axis L2 by driving the shaft 44 to rotate.

  When the driving mechanism 42 performs an input operation to rotate the shaft 44 from the non-operating state shown in FIG. 4, the driving mechanism 50 having the above-described configuration causes the screw portion 433 of the shaft 44 and the first The first actuating member 31 is moved to the first board 210 on the brake rotor 200 (to the left in FIG. 4) by the screwing relationship of the actuating member 31 with the passive sleeve 312, and the first actuating member 31 is moved. Is brought into contact with the first board surface 210. Then, by further driving the shaft 44 to press the first operating member 31 against the brake rotor 200, the driving means 42 separates the ring portion 441 of the shaft 44 from the passive sleeve 312 and holds the bearing sleeve 43 together. By extruding the seat 41, it separates from the first board surface 210 and the housing 10 (to the right in FIG. 4), and each of the interlocking members 33 fixed to the driving means 42 via the holding seat 41 and It moves with the attached second actuating member 32 and causes the second brake pad 24 on the second actuating member 32 to abut against the second board 220 on the brake rotor 200. Then, as shown in FIG. 6, the drive mechanism 50 enters an operation state in which the first brake pad 22 and the second brake pad 24 both stop the rotation of the brake rotor 200 with the brake rotor 200 interposed therebetween.

  When the drive mechanism 42 is operated to rotate the shaft 44 in the reverse direction from the operation state shown in FIG. Moves away from the first board surface 210 of the brake rotor 200 and approaches and contacts the first frame portion 11. Then, the driving means 42 further rotates the shaft 44 in the opposite direction, thereby following the ring portion 441 of the shaft 44 approaching the passive sleeve 312 of the first operating member 31, and then the shaft 44 by the retaining ring 45. It approaches the housing 10 with the holding seat 41 positioned. Then, each interlocking member 33 fixed to the driving means 42 moves to the second frame 12 side, and the second operating member 32 also moves to the second frame 12 side by the urging force of each elastic member 34. Then, the second brake pad 24 is separated from the second board surface 220 on the brake rotor 200. Then, the driving mechanism 50 returns to the operation state shown in FIG. 4 in which the first brake pad 22 and the second brake pad 24 are separated from the brake rotor 200.

  Incidentally, the drive mechanism 50 uses a drive method based on a structure in which a screw is rotated by an electric motor, but is not limited to this embodiment. Instead, the shaft 44 and the first operating member 31 are integrated, and an electromagnetic valve or a cylinder is used. It is also possible to change the structure to control the first brake pad 22 by reciprocating the shaft 44 along the second axis L2 by operating such as the driving means 42.

  As shown in FIGS. 4 and 5, the stress reducing unit 60 in the present embodiment includes a first self-aligning bearing 61 provided in a shaft hole 112 in the first frame portion 11 of the housing 10, A second self-aligning bearing 62 is provided in each first through hole 113 in the first frame portion 11 corresponding to each sleeve pipe 314 of the one operating member 31.

  A spherical bearing is used as the first self-aligning bearing 61, and has a first inner ring portion 612 and a first outer ring portion 611 that holds the first inner ring portion 612.

  The first self-aligning bearing 612 of the first self-aligning bearing 61 is movably movable relative to the driven sleeve 312 of the first operating member 31 screwed with the shaft 44. The outer surface is formed as a convex spherical surface centered on a predetermined axis point C on the second axis L2 while being externally inserted into the driven sleeve 312. On the other hand, the first outer ring portion 611 is formed into a concave spherical surface which is fitted into the shaft hole 112 and whose inner surface is in spherical contact with the outer surface of the convex spherical surface of the first inner ring portion 612. For this reason, the passive sleeve 312 of the first operating member 31 and the shaft 44 connected to the passive sleeve 312 have a predetermined axial point C with respect to the first frame 11 by the interposition of the first self-aligning bearing 61. Can swing to the center.

  As shown in FIG. 5, a spherical bearing is also used as each of the second self-aligning bearings 62, and each of the second self-aligning bearings 62 has a second inner ring portion 622 and a second inner ring portion 622 that holds the second inner ring portion 622. And an outer ring portion 621.

  The second inner ring portion 622 of each second self-aligning bearing 62 is externally inserted into the corresponding sleeve pipe 314 so as to be relatively movable with respect to the corresponding sleeve pipe 314, and the outer surface is formed as a convex spherical surface. ing. On the other hand, the second outer ring portion 621 of each of the second self-aligning bearings 62 is fitted into the first through hole 113 into which the corresponding sleeve pipe 314 is inserted, and the inner surface of the second outer ring portion 621 has the corresponding second inner ring. The portion 622 is formed as a concave spherical surface corresponding to the outer surface of the convex spherical surface. For this reason, the first operating member 31 can swing the passive sleeve 312 in the shaft hole 112 of the first frame portion 11 by the interposition of the first self-aligning bearing 61, and further, each second self-aligning Each sleeve pipe 314 can swing in each first through hole 113 by the interposition of the core bearing 62. Needless to say, the number of the second self-aligning bearings 62 can be appropriately changed with the addition of the first through holes 113 and the interlocking members 33 in the housing 10.

  The first and second self-aligning bearings 61 and 62 are not limited to the spherical bearing according to the present embodiment, but may include a self-aligning roller bearing or a self-aligning ball in which a rolling element intervenes. Since it is possible to appropriately change the bearing to a bearing or the like, the stress reducing means 60 causes the first operating member 31 to swing about the predetermined axis point C on the second axis L2 with respect to the first frame portion 11. What is necessary is just to be comprised.

  According to the structure of the stress reducing means 60 described above, the brake caliper 100 in the present embodiment is configured such that the shaft 44 is rotationally driven by the driving means 42 and the first operating member 31 is moved to the first board surface 210 on the brake rotor 200. When pressing the shaft 44 or operating it away from the first board surface 210, the stress applied to the shaft 44 in the shaft hole 112 of the first frame 11 is applied to the shaft hole 112 of the first frame 11 and the first hole. By using the first self-aligning bearing 61 interposed between the passive sleeve 312 of the operating member 31 and the first self-aligning bearing 61, the position can be correspondingly reduced by finely adjusting the position of the shaft 44 in the shaft hole 112. Further, on each of the first through holes 113, the sleeve pipes 314 are formed by using the second self-aligning bearings 62 interposed between the oscillating sleeve pipes 314 and the first through holes 113. Fine adjustment of the position in the first through hole 113 reduces the stress applied to the sleeve pipe 314 and smoothes the interlocking relationship between the first operating member 31 and members such as the housing 10 and the shaft 44. Can be.

  For this reason, the brake caliper 100 in the present embodiment causes the extension direction of the shaft 44 and the reaction force when the shaft 44 operates the first operating member 31 as a reaction force due to an error in manufacturing, abrasion in operation, and the like. Since the directions of the stress applied to the shaft 44 themselves do not coincide with each other, the members such as the first frame portion 11 and the first operating member 31 and the shaft 44 are worn and damaged during operation. It is possible to effectively suppress a situation in which the entirety of the brake caliper 100 becomes inoperable due to the rupture of 44, thereby extending the life of the member.

  By the way, the brake caliper of the present invention is applied as a slope start assist device in combination with, for example, an electric control device (ECU) for a vehicle, and the vehicle is moved from the slope due to insufficient acceleration of the vehicle on a slope or an erroneous operation by a driver. Since it can be automatically prevented from sliding down or going backwards, it can function more safely and conveniently.

  Next, a second embodiment illustrating a brake caliper of the present invention will be described with reference to FIG. FIG. 7 is a sectional view showing a second embodiment of the brake caliper of the present invention.

  The brake caliper 100a according to the second embodiment is structurally different from the brake caliper 100a according to the first embodiment in that the first frame 11a of the housing 10a, the driving mechanism 50a, and the stress reducing means 60a are structurally different. And two further self-lubricating bearings 70. Note that components common to the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment, the shaft hole 112a of the first frame portion 11a inserted by the shaft 44 is opened so as to have a hexagonal cross section. On the other hand, the operating mechanism 50a has an interlocking sleeve 47 instead of the passive sleeve 312 not being formed on the first operating member 31a. The interlocking sleeve 47 is slidable along the second axis L2, has a hexagonal cross section corresponding to the hexagonal cross section of the shaft hole 112a, and cannot rotate about the second axis L2. The shaft is fitted in the shaft hole 112a, and is slid along the second axis L2 in response to the rotation of the shaft 44 so as to push and move the operation block 311a of the first operation member 31a. It is screwed into a screw portion 443 at one end of 44.

  The present invention is not limited to this embodiment. The shaft hole 112a of the first frame portion 11a is formed to have a non-circular cross section other than a hexagon, and the interlocking sleeve 47 corresponds to the cross section of the shaft hole 112a. It is also possible to appropriately change the shape so as to have a non-circular cross-section.

  The stress reducing means 60a in the present embodiment is not the first self-aligning bearing 61 and the second self-aligning bearing 62, but swingably connects the operating block 311a of the first operating member 31a and the interlocking sleeve 47. The structure of the ball joint 63 is used. The ball joint 63 protrudes from the operation block 311a of the first operation member 31a and has a ball portion 631 having a convex spherical surface centered on a predetermined axis point C ', and a ball portion 63 formed on the interlocking sleeve 47. A socket 632 having a concave spherical surface corresponding to the spherical surface corresponding to the convex spherical surface of the portion 631 and receiving the ball portion 631; The structure of the ball joint 63 is not limited to the present embodiment, and is appropriately changed so that the ball portion 631 is formed on the interlocking sleeve 47 and the socket portion 632 is formed on the operation block 311a of the first operation member 31a. Is also possible.

  Each of the self-lubricating bearings 70 is attached to each of the first through holes 113 of the housing 10a, and slidably holds each of the sleeve pipes 314 of the first operating member 31. According to this structure, the stress applied to the shaft 44 during operation is controlled by the ball joint 63 of the first operating member 31 so that the first frame 11a of the first operating member 31 and the interlock between the first frame portion 11a and the shaft hole 112a are interlocked. Fine adjustment of the position with respect to the sleeve 47 and the shaft 44 can be correspondingly reduced. On the other hand, the respective self-lubricating bearings 70 interposed between the respective sleeve pipes 314 in the respective first through holes 113 in the first frame portion 11a are used to perform the second self-centering in the first embodiment. The same effect as that of the bearing 62 is exerted, the stress applied to the sleeve pipe 314 is reduced, and the interlocking relationship between the first operating member 31 and the members such as the housing 10 and the shaft 44 is made smooth, so that the life of the member is made effective. Can be extended.

  According to the above embodiment, the brake caliper of the present invention is configured such that the first operating member 31 is located at the predetermined axis point C / C ′ on the second axis L2 with respect to the first frame portion 11 of the housing 10. Is provided with a first self-aligning bearing 61 and a stress reducing means 60 such as a ball joint 63, which can be finely adjusted by swinging around the shaft 44, so that the shaft 44 is rotationally driven by the driving means 42. When the first operating member 31 is pressed against the first board 210 on the brake rotor 200 or is operated to move away from the first board 210, the stress applied to the shaft 44 is reduced by the axial hole 112 of the shaft 44. The position of the first operating member 31 or the position of the first operating member 31 with respect to the first frame 11 is correspondingly reduced by fine adjustment, so that wear and damage of each member can be effectively suppressed and the life of the member can be extended. Can, in particular extending the life of the screw shaft 44 for actuating the first actuating member 31 and the first brake pad 22 is rotated by a driving means 42.

  Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and can be variously modified without departing from the gist thereof.

  According to the above configuration, the brake caliper of the present invention can effectively prolong the life of the member, and thus can increase the durability of the product.

100, 100a Brake caliper 10, 10a Housing 11, 11a First frame portion 112, 112a Shaft hole 113 First through hole 12 Second frame portion 123 Second through hole 13 Frame space 200 Brake rotor 210 First Board surface 220 second board surface 22 first brake pad 24 second brake pad 31, 31a first operating member 311, 311a operating block 312 driven sleeve 314 sleeve pipe 32 second operating member 322 guide sleeve 33 interlocking member 331 Holding end 332 Connecting end 34 Elastic member 41 Holding seat 42 Driving means 421 Motor shaft 422 Motor frame 43 Sleeve bearing 431 Cylindrical part 432 Bearing part 44 Shaft 441 Ring part 442 Mounting part 443 Screw part 45 Stop ring 46 Nut
47 Interlocking sleeve 50, 50a Operating mechanism 60, 60a Stress reducing means
61 First Self-Aligning Bearing 611 First Outer Ring 612 First Inner Ring 62 Second Self-Aligning Bearing 621 Second Outer Ring 622 Second Inner Ring 63 Ball Joint 631 Ball 632 Socket 70 Self-lubricating bearings C, C 'Predetermined axis points L1 First axis L2 Second axis

Claims (7)

A brake caliper that rotates about a first axis and stops rotation of a disk-shaped brake rotor having a first disk surface that is substantially perpendicular to the first axis on one surface,
The brake caliper includes a first brake pad, a housing, and an operation mechanism,
The first brake pad is configured to stop rotation of the board-shaped brake rotor by abutting on the first board surface,
The housing has a first frame portion disposed on the first board side of the brake rotor and adjacent to the first brake pad,
The actuation mechanism comprises:
A first actuating member arranged to be movable substantially parallel to the first axis and connected to the first brake pad;
The first operating member extends along a second axis substantially parallel to the first axis, and can be driven to move along the second axis by rotation about the second axis. A shaft held by the housing,
Driving means capable of controlling movement of the first operating member along the second axis by rotationally driving the shaft;
Has,
The first operating member further includes a stress reducing unit configured to be swingable about a predetermined axis point on the second axis with respect to the first frame portion,
When the shaft is driven to rotate and presses the first operating member against the first board surface of the brake rotor, stress applied to the shaft is applied to the first frame of the first operating member. Can be reduced by swinging,
A brake caliper characterized by the following. The brake rotor has a second board surface on a side opposite to the first board surface,
The brake caliper further has a second brake pad,
The first brake pad and the second brake pad are configured to stop rotation of the board-shaped brake rotor by being sandwiched between the first board face and the second board face. And
The housing further includes a second frame portion disposed on the second board side of the brake rotor and adjacent to the second brake pad,
The actuation mechanism comprises:
The plate-shaped brake rotor extends from a holding end on the second board side to a connection end on the first board side substantially in parallel with the first axis, and the first axis An interlocking member installed on the housing so as to be slidable substantially in parallel with,
A second actuating member attached to the holding end side of the interlocking member so as to be movable with the interlocking member and connected to the second brake pad;
An elastic member attached to the interlocking member to urge the first operating member and the second operating member to be separated from each other;
The first operating member is attached to the connection end side of the interlocking member, and is slidably held by the interlocking member along the interlocking member,
The driving means is fixed to the connection end of the interlocking member,
The driving means drives the shaft to rotate, moves the first operating member to the first board surface of the brake rotor, and moves the first brake pad of the first operating member to the first position. The drive means is separated from the first board surface of the brake rotor by contacting the first board surface and further rotating the shaft to press the first operating member against the brake rotor side. Moving together with the interlocking member fixed to the driving means and the second operating member attached to the interlocking member, and moving the second brake pad on the second operating member to the brake rotor. Is configured to abut on the second board surface,
The brake caliper according to claim 1, wherein: The interlocking member is a rod extending from the holding end to the connection end,
The operating mechanism has a plurality of the interlocking members,
The first frame portion has an axial hole inserted by the shaft,
The first operating member includes:
An operation block to which the first brake pad is connected and which is inserted into each of the interlocking members so as to be slidable substantially parallel to the second axis;
It extends from the operation block into the shaft hole of the first frame portion, and is screwed to one end of the shaft so that the shaft can rotate along with the operation block along the second axis. A driven sleeve,
Has,
The stress reducing means,
The first operating member screwed to the shaft is externally inserted into the driven sleeve so as to be relatively movable with respect to the driven sleeve, and an outer surface is formed as a convex spherical surface centered on the predetermined axis point. A first inner ring portion;
A first outer ring portion fitted into the shaft hole and having an inner surface formed as a concave spherical surface corresponding to an outer surface of the convex spherical surface of the first inner ring portion. With bearings,
The first actuating member can swing about the predetermined axis point with respect to the first frame portion of the housing by the interposition of the first self-aligning bearing;
The brake caliper according to claim 2, wherein: The first frame portion further includes a plurality of first through holes that are respectively inserted by the interlocking members and hold the interlocking members slidably substantially parallel to the second axis,
The second frame portion includes a plurality of second holding portions that respectively hold the holding end portions of the interlocking members inserted into the respective first through holes so as to be slidable in parallel with the second axis. And the through hole is opened,
The first operating member is interpolated by each of the interlocking members so as to be relatively movable along the second axis with respect to each of the interlocking members, and slides substantially in parallel with the second axis. A plurality of sleeve pipes each movably held in each of the first through holes formed in the first frame portion,
The stress reducing means includes a plurality of second self-aligning bearings respectively corresponding to the respective sleeve pipes,
Each of the second self-aligning bearings is externally inserted into the corresponding sleeve pipe so as to be relatively movable with respect to the corresponding sleeve pipe, and has a second inner ring portion having an outer surface formed as a convex spherical surface;
A second sleeve having a concave spherical surface corresponding to the outer surface of the convex spherical surface of the second inner ring portion, while the corresponding sleeve pipe is fitted into the first through hole inserted therein; And an outer ring portion,
The first operating member can swing by the interposition of the first self-aligning bearing and each of the second self-aligning bearings.
The brake caliper according to claim 3, wherein: The interlocking member is a rod extending from the holding end to the connection end,
The operating mechanism has a plurality of the interlocking members,
The first operating member is connected to the first braking pad, and has an operating block inserted by each of the interlocking members so as to be slidable substantially parallel to the second axis.
The first frame portion is inserted by the shaft, and has an axial hole having a non-circular cross section,
The actuating mechanism is slidable along the second axis and has a non-circular cross-section corresponding to the non-circular cross-section of the shaft hole, and cannot rotate about the second axis. The shaft is fitted into the shaft hole of the first frame portion, and slides along the second axis in accordance with rotation of the shaft so that the operating block can be pushed and moved. And an interlocking sleeve screwed to one end of the
The stress reducing means,
A ball portion protruding from any one of the operation block and the interlocking sleeve, and having a convex spherical surface centered on the predetermined axis point;
A socket portion formed on the operation block and the interlocking sleeve on another person other than the one, having a concave spherical surface corresponding to the convex spherical surface of the ball portion, and receiving the ball portion;
A ball joint having
The brake caliper according to claim 2, wherein: The ball portion of the ball joint is formed on the operation block of the first operation member,
The socket portion of the ball joint is formed on the interlocking sleeve of the operating mechanism.
The brake caliper according to claim 5, wherein: The first frame portion further includes a plurality of first through holes that are respectively inserted by the interlocking members and hold the interlocking members slidably substantially parallel to the second axis,
The first operating member is interpolated by each of the interlocking members so as to be relatively movable along the second axis with respect to each of the interlocking members, and slides substantially in parallel with the second axis. A plurality of sleeve pipes each movably held in each of the first through holes formed in the first frame portion,
2. The device according to claim 1, further comprising a plurality of self-lubricating bearings respectively attached to the first through holes of the housing and slidably holding the sleeve pipes of the operating member. 6. The brake caliper according to 6.