JP2009058035A - Movable caliper type disk brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a function of inhibiting noises generated between a reaction part of a caliper and a back plate of an outer pad during braking. <P>SOLUTION: In a movable caliper disk brake device, the reaction part 14 of the caliper 10 has a plurality of pawls 14a, 14b arranged opposite to the back plate 52a of the outer pad 52, and surface forming elements (plates 16, 17) having flat surfaces 16a, 17a for contacting with a rear surface of the back plate 52a of the outer pad 52 are separately fixed to the respective pawls 14a, 14b. During braking, one of the plates 16, 17 is not pressed by the plurality of pawls 14a, 14b and the respective plates 16, 17 are pressed by the respective pawls 14a, 14b. Accordingly, the respective plates 16, 17 are hardly affected by manufacturing errors of the other pawls 14b, 14a and exert the expected function of inhibiting noise generation during braking. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a disc brake device, and in particular, a cylinder portion that supports a piston that can be pushed toward an inner pad toward a disc rotor and an outer pad that can move in the axial direction of the rotor and an outer pad can be pushed toward the disc rotor. A caliper having a reaction part is supported by a mounting mechanism so as to be movable in the rotor axial direction, and the inner pad and the outer pad are supported by the mounting so as to be movable in the rotor axial direction. The mounting force is received by the mounting when the inner pad and the outer pad are pushed and pressed in the axial direction of the rotor toward the disk rotor. The present invention relates to a movable caliper type disc brake device.

This type of disc brake device is disclosed, for example, in Patent Document 1 below. In this movable caliper type disc brake device, a plate (shim plate) is provided between the reaction portion of the caliper and the back plate of the outer pad. It is arranged to suppress the generation of abnormal noise during braking by the same plate.
JP 2004-316899 A

  In the movable caliper type disc brake device described in Patent Document 1 described above, the plate that is interposed between the reaction part of the caliper and the back plate of the outer pad and is fixed to the reaction part is a single component. It consists of For this reason, when the reaction part has a plurality of claw parts arranged to face the back plate of the outer pad, the plate is caused during braking due to a manufacturing error of each of the claw parts. There is a possibility that the deformed state comes into contact with the back surface of the back plate of the outer pad, and there is a risk that the function of suppressing abnormal noise generation during braking by the plate will be reduced. The above-described deformation of the plate is a deformation at a plane portion corresponding to each claw portion of the plate, and this deformation is caused by a plate having a single part having a plurality of claws due to a manufacturing error of each claw portion. By being pressed by the portion, deformation occurs in the intermediate portion of the plate (portion not pressed by the claw portion), and the flat portion corresponding to each claw portion of the plate is deformed by deformation of the intermediate portion.

  The present invention has been made to solve the above-described problem, and in the movable caliper type disc brake device configured as described above, the reaction portion is disposed to face the back plate of the outer pad. Each of the claw portions is characterized in that a surface forming body having a flat surface contacting the back surface of the outer pad is separately fixed to each of the claw portions.

  In the movable caliper type disc brake device according to the present invention, the surface forming bodies are separately fixed to the plurality of claw portions of the reaction portion. For this reason, at the time of braking, one surface forming body is not pressed by a plurality of claw portions, and each surface forming body is pressed by each claw portion. Therefore, each surface forming body is hardly affected by the manufacturing errors of the other claw portions, and exhibits the desired noise generation suppressing function during braking.

  In carrying out the present invention, each claw portion is formed with an engaging portion that engages with a locking portion provided on each surface forming body, and the locking portion of each surface forming body is the each claw. It is also possible that the respective surface forming bodies are detachably fixed to the respective claw portions by being elastically engaged with the engaging portions of the portions. In this case, it is possible to improve the detachability of each surface forming body to each claw portion, and it is possible to improve the assembling workability or replacement workability of each surface forming body to each claw portion. It is.

  In carrying out the present invention, the surface forming body may be formed in an asymmetric shape (a shape having a different plane size) on the leading side and the trailing side. In this case, the leading side surface forming body optimizes the abnormal sound generation suppressing function on the leading side, and the trailing side surface forming body optimizes the abnormal sound generation suppressing function on the trailing side. Can be achieved.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 schematically show a first embodiment in which the present invention is applied to a movable caliper type disc brake device for a vehicle. In the disc brake device A of the first embodiment, both calipers 10 are provided. The arm portions 11 and 12 are supported by the two caliper support portions 41 and 42 of the mounting 40 via a pair of pin slide mechanisms 20 and 30 so as to be slidable in the rotor axial direction.

  As shown in FIG. 3, the caliper 10 includes a cylinder portion 13 that supports a piston 71 that can move the inner pad 51 toward the disk rotor 60 movably in the rotor axial direction, and an outer pad 52 that supports the disk rotor 60. And a reaction portion 14 that can be pushed toward the top, and a bridge portion 15 that connects them to each other, and has a shape straddling a part of the disk rotor 60. A piston seal 72 and a dust boot 73 are provided between the cylinder portion 13 of the caliper 10 and the piston 71.

  The piston seal 72 is assembled to the cylinder inner hole 13a of the cylinder portion 13 and is engaged with the outer periphery of the piston 71 at the inner peripheral portion, and the piston 71 constitutes a piston retraction mechanism. The piston retraction mechanism has a function of returning the piston 71 by a predetermined amount toward the inner side with respect to the cylinder portion 13 when the brake is released by the elastic return action of the inner peripheral portion of the piston seal 72. The dust boot 73 is assembled to the outer periphery of the piston 71 at the inner peripheral end portion, and is assembled to the opening side mounting portion 13b of the cylinder inner hole 13a of the cylinder portion 13 at the outer peripheral end portion. The moving parts are protected.

  As shown in FIG. 2, one of the pin slide mechanisms 20 is a slide guide pin that extends in the rotor axis direction and is movably fitted in a guide hole 41a provided in the caliper support portion 41 of the mounting 40 in the rotor axis direction. 21, a pin bolt 22 that is inserted through a mounting hole 11 a provided in the arm portion 11 of the caliper 10 and integrally connects the slide guide pin 21 to the arm portion 11 of the caliper 10, and protrudes from the guide hole 41 a of the slide guide pin 21. It includes a pin boot 23 that is mounted on the outer periphery of the portion to protect the sliding portion of the slide guide pin 21, and a bush 24 that is assembled to the outer periphery of the distal end portion of the slide guide pin 21.

  As shown in FIG. 2, the other pin slide mechanism 30 is a slide guide pin that extends in the rotor axial direction and is movably fitted in a guide hole 42a provided in the caliper support portion 42 of the mounting 40 in the rotor axial direction. 31, a pin bolt 32 that is inserted into the mounting hole 12 a provided in the arm portion 12 of the caliper 10 and integrally connects the slide guide pin 31 to the arm portion 12 of the caliper 10, and protrudes from the guide hole 42 a of the slide guide pin 31. It includes a pin boot 33 that is attached to the outer periphery of the part to protect the sliding portion of the slide guide pin 31 and a bush 34 that is assembled to the outer periphery of the distal end portion of the slide guide pin 31.

  The mounting 40 includes the caliper support portions 41 and 42 described above, a pad support portion 43 and an attachment portion 44 on the inner side of the disc rotor 60, and a pad support portion 45 on the outer side of the disc rotor 60. Thus, the disk rotor 60 is formed so as to straddle a part. In addition, bolt insertion holes 44a and 44b (see FIG. 1) are formed in the mounting portion 44, and the mounting 40 is assembled to a part of the vehicle body by bolts (not shown) inserted therethrough. ing.

  In the disc brake device A, the inner pad 51 is assembled to the inner side pad support portion 43 of the mounting 40 via a pair of pad clips 81 and 82, and the pair is attached to the outer side pad support portion 45 of the mounting 40. The outer pads 52 are assembled through the pad clips 91 and 92.

  Each of the pad clips 81 and 82 is formed by press-molding a thin spring material, and is assembled to the inner side pad support portion 43 of the mounting 40. The inner pad 51 is supported in a state in which movement in the rotor radial direction and rotor circumferential direction is restricted and movement in the rotor axial direction is allowed. Each of the pad clips 91 and 92 is formed by press-molding a thin spring material and is assembled to the outer side pad support part 45 of the mounting 40. The outer pad 52 is supported in a state in which movement in the rotor radial direction and rotor circumferential direction is restricted and movement in the rotor axial direction is permitted.

  The inner pad 51 is constituted by the back plate 51a and a lining 51b fixed to the back plate 51a, and a pair of convex portions formed on the back plate 51a are used to mount the mounting 40 via the pad clips 81 and 82. The inner side pad support 43 is assembled in the recess. The outer pad 52 is configured by the back plate 52a and a lining 52b fixed to the back plate 52a, and a pair of convex portions formed on the back plate 52a is used to mount the mounting 40 via the pad clips 91 and 92. The outer side pad support part 45 is assembled in the recess.

  By the way, in this disc brake device A, the reaction part 14 of the caliper 10 has two claw parts 14a and 14b arranged facing the back plate 52a of the outer pad 52, and each of these claw parts. Plates 16 and 17 as surface forming bodies are separately fixed to 14a and 14b, respectively. The plate 16 is the leading side when the forward rotation direction of the disk rotor 60 is the direction indicated by the arrow in FIG. 1, and the plate 17 is the forward rotation direction of the disk rotor 60 indicated by the arrow in FIG. In the direction, it is on the trailing side, and the plate 16 and the plate 17 are formed in an asymmetric shape (a shape having a different plane size).

  The plate 16 is made of a stainless steel plate and is fixed to the claw portion 14a so as to be detachable in the rotor axial direction. As shown in FIGS. 1, 3, and 4, the back plate 52a of the outer pad 52 is provided. As shown in FIGS. 1, 3 and 5, a pair of hooks 16b formed at the rotor circumferential end portion of the flat surface 16a, as shown in FIG. 1, FIG. 4, and FIG. As shown in FIG. 4, there are four locking claws 16 d formed at the center of the flat surface 16 a.

  The pair of hooks 16b are formed by being bent at approximately 90 degrees with respect to the flat surface 16a, sandwiching the claw portion 14a in the rotor circumferential direction, and moving in the rotor circumferential direction with respect to the claw portion 14a of the plate 16 Is regulated. Each latching claw 16d is formed by being bent at approximately 90 degrees with respect to the flat surface 16a and curving in a wave shape, and is elastically and detachably engaged with an engagement hole 14a1 formed in the claw portion 14a. ing. The engagement hole 14a1 of the claw portion 14a is formed in the rotor axial direction and is formed so as to penetrate the claw portion 14a.

  On the other hand, the plate 17 is made of a stainless steel plate, similarly to the plate 16 described above, and is fixed to the claw portion 14b so as to be detachable in the rotor axial direction, and comes into contact with the back surface of the back plate 52a of the outer pad 52. In addition to having a flat surface 17a, it has a pair of hooks 17b formed at the rotor circumferential end of the flat surface 17a and four locking claws 17d formed at the center of the flat surface 17a. The plane 17 a is formed in a shape smaller than the plane 16 a of the plate 16.

  The pair of hooks 17b is formed by being bent at approximately 90 degrees with respect to the flat surface 17a. The hooks 17b sandwich the claw portions 14b in the rotor circumferential direction, and move in the rotor circumferential direction with respect to the claw portions 14b of the plate 17. Is regulated. Each latching claw 17d is formed by being bent at approximately 90 degrees with respect to the flat surface 17a and curving in a wave shape, and is elastically and detachably engaged with an engagement hole 14b1 formed in the claw portion 14b. ing. The engaging hole 14b1 of the claw portion 14b is formed in the rotor axial direction and is formed so as to penetrate the claw portion 14b.

  In the disc brake device A of the first embodiment configured as described above, at the time of braking, the inner pad 51 is pushed and pressed toward the disc rotor 60 by the piston 71, and the outer pad 52 is the reaction portion 14 of the caliper 10. Thus, the inner pad 51 and the outer pad 52 are slidably brought into contact with the disk rotor 60 to be braked. The braking force generated at this time is received by the inner side pad support 43 of the mounting 40 from the back plate 51a of the inner pad 51 via the pad clip 81 or 82, and from the back plate 52a of the outer pad 52 to the pad. It is received by the outer pad support portion 45 of the mounting 40 via the clip 91 or 92.

  By the way, in this disc brake device A, the plates 16 and 17 are separately fixed to the two claw portions 14a and 14b of the reaction portion 14 of the caliper 10, respectively. Therefore, at the time of braking, one plate (16, 17) is not pressed by the plurality of claw portions (14a, 14b), and each plate 16, 17 is pressed by each claw portion 14a, 14b. It becomes. Accordingly, the plates 16 and 17 are hardly affected by the manufacturing errors of the other claw portions 14b and 14a, and exhibit a desired noise generation suppression function during braking.

  Further, in this disc brake device A, engagement holes 14a1, 14b1 are formed in the respective claw portions 14a, 14b, and locking claws 16d provided on the respective plates 16, 17 in these engagement holes 14a1, 14b1. , 17d are elastically engaged, so that the plates 16, 17 are fixed to the claw portions 14a, 14b in a detachable manner. Therefore, the detachability of the plates 16 and 17 to the claw portions 14a and 14b can be improved, and the workability of assembling or replacing the plates 16 and 17 to the claw portions 14a and 14b can be improved. It is possible to improve.

  In the disc brake device A, the plates 16 and 17 are formed in an asymmetric shape (a shape having a different plane size) on the leading side and the trailing side. For this reason, the leading side plate 16 optimizes the abnormal sound generation suppression function on the leading side, and the trailing side plate 17 optimizes the abnormal noise generation suppression function on the trailing side. Is possible.

  In the first embodiment described above, the pin slide mechanisms 20 and 30 are employed as the slide mechanism for supporting the caliper 10 on the mounting 40 so as to be movable in the rotor axial direction. However, this slide mechanism is limited to the above embodiment. However, the present invention can be implemented with appropriate modifications. In the first embodiment described above, a pair of hooks 16b and 17b are provided on the plates 16 and 17, but the engagement holes 14a1 and 14b1 are formed in a square shape so that the plates 16 and 17 can be prevented from rotating. Thus, the hooks 16b and 17b can be eliminated.

  Further, in the first embodiment described above, two pairs of four locking claws 16d and 17d (locking portions) provided on the plates 16 and 17 on the claw portions 14a and 14b of the reaction portion 14 in the caliper 10 are provided. Engagement holes 14a1 and 14b1 (engagement portions) are formed, and the locking claws 16d and 17d of the plates 16 and 17 are elastically repelled in the engagement holes 14a1 and 14b1 of the claw portions 14a and 14b. The plates 16 and 17 are detachably fixed to the claw portions 14a and 14b by engaging with each other. However, the configuration is carried out as in the second embodiment shown in FIGS. Is also possible.

  In the second embodiment shown in FIGS. 6 and 7, a pair of locking hooks 116 d and 117 d (locking portions) provided on the plates 116 and 117 on the claws 114 a and 114 b of the reaction portion 114 of the caliper 110. Engaging recesses 114a1, 114b1 (engaging portions) are formed, and the locking hooks 116d, 117d of the plates 116, 117 are elastically engaged with the engaging recesses 114a1, 114b1 of the claw portions 114a, 114b. By repellingly engaging, the plates 116 and 117 are detachably fixed to the claw portions 114a and 114b. Each of the plates 116 and 117 has flat surfaces 116a and 117a that are in contact with the back surface of the back plate 52a of the outer pad 52, as in the first embodiment.

  In each of the above-described embodiments, the present invention is applied to the movable caliper type disc brake device in which the two claw portions 14a, 14b, 114a, 114b are formed on the reaction portions 14, 114 in the calipers 10, 110. The present invention can be similarly applied to a movable caliper type disc brake device in which three or more claw portions are formed in the reaction portion of the caliper.

  Further, in each of the above-described embodiments, the present invention is implemented by assembling the plates 16, 17, 116, 117 only to the claw portions 14a, 14b, 114a, 114b of the reaction portions 14, 114 in the calipers 10, 110. It is also possible to implement the present invention by attaching a plate to the back plate 52 a of the outer pad 52. It is also possible to implement the present invention by attaching plates to the piston 71 and the back plate 51a of the inner pad 51, respectively. Further, in each of the above embodiments, the plates 16, 17, 116, 117 are made of stainless steel plate, but the invention is not limited to this, and the plate 16, 17, 116, 117 is made of stainless steel plate coated with a coating material to further improve slidability. It is also possible to implement as a resin with good sliding properties.

1 is a side view schematically showing a first embodiment of a movable caliper disc brake device according to the present invention. It is a partially broken front view of the disc brake device shown in FIG. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. FIG. 2 is an enlarged view of a single upper plate shown in FIG. 1. It is a side view which shows roughly 2nd Embodiment of the movable caliper type disc brake apparatus by this invention. FIG. 7 is an enlarged view of a single plate shown in FIG. 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Caliper, 11, 12 ... Arm part, 13 ... Cylinder part, 14 ... Reaction part, 14a, 14b ... Claw part, 14a1, 14b1 ... Engagement hole (engagement part), 15 ... Bridge part, 16, 17 ... Plate (surface forming body), 16a, 17a ... plane, 16b, 17b ... hook, 16d, 17d ... locking claw (locking portion), 20, 30 ... pin slide mechanism, 40 ... mounting, 41, 42 ... caliper support Part, 43, 45 ... pad support part, 51 ... inner pad, 51a ... back plate of inner pad, 52 ... outer pad, 52a ... back plate of outer pad, 60 ... disc rotor, 71 ... piston, 110 ... caliper, 111 , 112 ... arm part, 114 ... reaction part, 114a, 114b ... claw part, 114a1, 114b1 ... engagement recess (engagement part), 116, 1 7 ... plate (surface forming body), 116a, 117a ... plane, 116d, 117d ... locking hook (engaging portions), A ... movable caliper type disc brake device

Claims (3)

The cylinder part (13) and the outer pad (52) for supporting the piston (71) that can be pushed toward the disk rotor (60) so that the inner pad (51) can be pushed toward the disk rotor (60) are moved to the disk rotor (60). A caliper (10) having a reaction part (14) that can be pushed toward the support is supported by the mounting (40) via the slide mechanism (20, 30) so as to be movable in the rotor axial direction, and the inner pad ( 51) and the outer pad (52) are respectively supported by the mounting (40) so as to be movable in the rotor axial direction, and the inner pad (51) and the outer pad (52) are supported by the disk rotor (60). The braking force generated by sliding contact with the disk rotor (60) by being pushed / pressed in the rotor axial direction toward the A movable caliper type disc brake device configured to be nest in emissions computing (40),
The reaction part (14, 114) has a plurality of claw parts (14a, 14b, 114a, 114b) arranged facing the back plate (52a) of the outer pad (52). Each claw portion (14a, 14b, 114a, 114b) has a surface forming body (plate 16, 17, 116, 117) are fixed separately from each other, and a movable caliper type disc brake device is characterized.   The movable caliper type disc brake device according to claim 1, wherein each claw portion (14 a, 14 b, 114 a, 114 b) is provided with a latch provided on each surface forming body (plate 16, 17, 116, 117). Engaging portions (14a1, 14b1, 114a1, 114b1) that engage with the portions (16d, 17d, 116d, 117d) are formed, and the surface forming bodies (plates 16, 17, 116, 117) are locked. When the portions (16d, 17d, 116d, 117d) are elastically engaged with the engaging portions (14a1, 14b1, 114a1, 114b1) of the respective claw portions (14a, 14b, 114a, 114b), A surface forming body (plates 16, 17, 116, 117) is detachably fixed to the claw portions (14a, 14b, 114a, 114b). That the movable caliper type disc brake device.   3. The movable caliper type disc brake device according to claim 1, wherein the surface forming body (plates 16, 17, 116, 117) is formed in an asymmetric shape on a leading side and a trailing side. Movable caliper type disc brake device.

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