JP7675312B2 - Caliper body mounting structure for vehicle disc brake - Google Patents

Description

The present invention relates to a caliper body mounting structure for a vehicle disc brake, and more specifically, to a caliper body mounting structure for a vehicle disc brake that mounts a radial mount type vehicle disc brake to a vehicle body via a bracket.

Conventionally, in a radial mount type caliper body in which bolt insertion holes perpendicular to the disk axis are formed on both sides in the disk circumferential direction in the working part equipped with a piston of the caliper body, and the caliper mounting bolt inserted into the bolt insertion hole is fastened to the vehicle body side, the caliper mounting part is integrally protruding from the wheel suspension device, and the male thread part of the caliper mounting bolt inserted into the bolt insertion hole is fastened to the caliper mounting part (see, for example, Patent Document 1). Also, in an axial mount type caliper body in which bolt insertion holes in the disk axial direction are formed on the disk rotation side and the disk inner peripheral side in the working part equipped with a piston of the caliper body, and the caliper mounting bolt inserted into the bolt insertion hole is fastened to the vehicle body side, the caliper mounting part is integrally protruding from the wheel suspension device, and the male thread part of the caliper mounting bolt inserted into the bolt insertion hole is fastened to the caliper mounting part (see, for example, Patent Document 2).

JP 2001-280376 A Patent No. 4293708

However, while the radial mount type caliper body of the above-mentioned Patent Document 1 has the advantage of high mounting rigidity, it is necessary to ensure a sufficient joining area between the caliper body and the caliper mounting part so that the caliper body does not move even when subjected to the rotational moment generated in the disc rotation direction during braking, which results in a large caliper mounting part. Furthermore, it is not possible to directly mount a radial mount type caliper body to the caliper mounting part of a wheel suspension device.

The present invention aims to provide a caliper body mounting structure for a vehicle disc brake that can be mounted to a wide range of wheel suspension systems while ensuring the mounting rigidity of a radial mount type caliper body.

In order to achieve the above object, the caliper body mounting structure of the vehicle disc brake of the present invention has a caliper body with a piston arranged across the outer periphery of a disc rotor, and bolt insertion holes perpendicular to the disc axis are formed on both sides of the disc circumferential direction, and the caliper body is mounted to a caliper mounting part provided on a wheel suspension using a caliper mounting bolt inserted into the bolt insertion hole. In the caliper body mounting structure of the vehicle disc brake, a caliper bracket is formed with a caliper mounting hole perpendicular to the disc axis to which the caliper body is attached and a vehicle body mounting hole in the disc axial direction that is attached to the caliper mounting part, and a bracket mounting hole in the disc axial direction is formed in the caliper mounting part, and a vehicle body mounting bolt is fastened between the vehicle body mounting hole and the bracket mounting hole, and the caliper mounting bolt is fastened between the bolt insertion hole and the caliper mounting hole, thereby mounting the caliper body to the caliper mounting part via the caliper bracket.

In addition, the caliper bracket is preferably arranged on the vehicle body outer side of the caliper mounting portion, and a plate-shaped fastening member having a female threaded portion that screws into the male threaded portion of the vehicle body mounting bolt is arranged at a position corresponding to the bracket mounting hole on the vehicle body side of the caliper mounting portion, and the caliper bracket is preferably attached to the caliper mounting portion by fastening the male threaded portion of the vehicle body mounting bolt that has been inserted through the vehicle body mounting hole and the bracket mounting hole to the female threaded portion.

Furthermore, it is preferable that a plurality of the bracket mounting holes are formed, and that the fastening member is integrally formed with a female thread portion arranged at positions corresponding to each of the plurality of bracket mounting holes via a connecting portion.

According to the caliper body mounting structure of the vehicle disc brake of the present invention, the caliper mounting portion can be made smaller while ensuring the mounting rigidity of the radial mount type caliper body. Furthermore, it is possible to mount a radial mount type caliper body to the caliper mounting portion of a wheel suspension device to which an axial mount type caliper body is attached, and the radial mount type caliper body can be mounted to a wider range of wheel suspension devices, including the caliper mounting portion of an axial mount type wheel suspension device. Furthermore, by changing the shape of the caliper bracket, it is possible to adjust the mounting position of the caliper body according to changes in the size of the outer diameter of the disc rotor and the dimensions of the wheel suspension device, thereby improving layout flexibility.

Furthermore, the caliper bracket is disposed on the vehicle body outside of the caliper mounting portion, and a plate-shaped fastening member having a female thread that screws into the male thread of the vehicle body mounting bolt is disposed at a position on the vehicle body inside of the caliper mounting portion corresponding to the bracket mounting hole, and the male thread of the vehicle body mounting bolt that is inserted between the vehicle body mounting hole and the bracket mounting hole is fastened to the female thread to attach the caliper bracket to the caliper mounting portion, thereby increasing the mounting rigidity of the caliper bracket without being affected by the clearance between the caliper mounting portion and the disc rotor. Also, because the mounting rigidity of the caliper bracket can be increased, even if the caliper body receives a rotational moment generated in the disc rotation direction during braking, the rotational moment can be reliably received by the caliper body and the caliper bracket, and the movement of the caliper body can be suppressed.

Furthermore, by forming multiple bracket mounting holes and forming the fastening member with female threaded portions that are positioned at positions corresponding to the multiple bracket mounting holes, respectively, via a connecting portion, the caliper bracket can be easily assembled and the caliper bracket can be accurately assembled to the caliper mounting portion.

1 is a front view of a main portion showing an example of a caliper body mounting structure of the present invention; FIG. 4 is a plan view of a main portion showing an example of a caliper body mounting structure. FIG. 4 is a rear view of a main portion showing an example of the caliper body mounting structure. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1 is a front view showing an example of a caliper body mounting structure of the present invention;

1 to 5 are diagrams showing an example of a caliper body mounting structure for a vehicle disc brake according to the present invention. Arrow A indicates the direction of rotation of the disc rotor that rotates together with the wheel when the vehicle moves forward, and the disc rotation outward and inward sides described below refer to the direction when the vehicle moves forward.

The vehicle disc brake 1 in this embodiment has a radial mount type caliper body 2 attached via a caliper bracket 4 to a pair of caliper mounting portions 3a, 3a provided on the lower end side of the front fork 3 (wheel suspension device).

The caliper body 2 comprises a pair of action parts 2a, 2a arranged opposite to each other on both sides of the disc rotor 5, which is supported on the lower end of the front fork 3 and rotates together with the wheel, and a bridge part 2b that connects them across the outer circumference of the disc rotor 5. The action parts 2a, 2a each have a cylinder hole 2c, 2c that accommodates a piston 7, 7 that presses the friction pad 6 against the disc rotor 5. The caliper body 2 has mounting boss parts 2d, 2d formed on the action part 2a on the vehicle body mounting side arranged on one side of the disc rotor 5, and is attached to the caliper bracket 4 using caliper mounting bolts 8, 8 that pass through bolt insertion holes 2e, 2e formed in the mounting boss parts 2d, 2d.

The mounting boss portions 2d, 2d are formed on the disk rotation inward and outward sides of the action portion 2a by padding in a direction perpendicular to the disk axis, i.e., parallel to an imaginary line L1 perpendicular to the disk axis connecting the center of rotation of the disk rotor 5 and the center of pad pressure on the caliper body 2, and the bolt insertion holes 2e, 2e, which are slightly larger in diameter than the caliper mounting bolts 8, 8, are formed through the mounting boss portions 2d, 2d in a direction parallel to the imaginary line L1 perpendicular to the disk axis.

The caliper mounting parts 3a, 3a formed on the front fork 3 are protruded on the radially outer side of the disc on the rear side of the vehicle body of the front fork 3 and on the radially inner side of the disc, and the caliper bracket 4 is attached via a plate-shaped fastening member 10 using a vehicle body mounting bolt 9. The caliper mounting parts 3a, 3a have bracket mounting holes 3b, 3b that are slightly larger in diameter than the vehicle body mounting bolts 9, 9, formed through them in the disk axial direction.

The caliper bracket 4 includes a vehicle body mounting arm 4a attached to the caliper mounting portion 3a, 3a, and a caliper body mounting arm 4b extending from the radially inner end of the vehicle body mounting arm 4a in a direction substantially perpendicular to the imaginary line L1 perpendicular to the disk axis. The caliper body mounting arm 4b includes boss portions 4d, 4d that are coaxial with the bolt insertion holes 2e, 2e and have female threaded holes 4c, 4c (caliper mounting holes) therein that screw into the male threaded portions 8a, 8a of the caliper mounting bolts 8, 8. The vehicle body mounting arm 4a also includes vehicle body mounting holes 4e, 4e that are coaxial with the bracket mounting holes 3b, 3b and have a diameter slightly larger than that of the vehicle body mounting bolts 9, 9.

The fastening member 10 is formed in the shape of a plate integrally comprising female threaded portions 10a, 10a arranged at positions corresponding to the bracket mounting holes 3b, 3b, and a connecting portion 10b connecting the female threaded portions 10a, 10a, and the female threaded portions 10a, 10a are formed to screw into the male threaded portions 9a, 9a of the vehicle body mounting bolts 9, 9.

To attach the caliper body 2, first, the vehicle body mounting arm 4a of the caliper bracket 4 is placed on the vehicle body outer side of the caliper mounting parts 3a, 3a of the front fork 3, and the female threaded portions 10a, 10a of the fastening member 10 are placed at positions corresponding to the bracket mounting holes 3b, 3b on the vehicle body inner side of the caliper mounting parts 3a, 3a. The male threaded portions 9a, 9a of the vehicle body mounting bolts 9, 9 inserted through the vehicle body mounting holes 4e, 4e and the bracket mounting holes 3b, 3b are fastened to the female threaded portions 10a, 10a of the fastening member 10, thereby attaching the caliper bracket 4 to the caliper mounting parts 3a, 3a.

Next, the outer peripheral disc side surface of the boss portion 4d, 4d of the caliper body mounting arm 4b of the caliper bracket 4 is butted against the inner peripheral disc side surface of the mounting boss portion 2d, 2d of the caliper body 2, the caliper mounting bolts 8, 8 are inserted into the bolt insertion holes 2e, 2e, and the male threaded portions 8a, 8a are fastened to the female threaded holes 4c, 4c, thereby attaching the caliper body 2 to the caliper bracket 4.

The caliper body mounting structure of this embodiment is configured as described above, so that the caliper mounting parts 3a, 3a can be made smaller than before while ensuring the mounting rigidity of the radial mount type caliper body 2. Furthermore, it is possible to mount the radial mount type caliper body 2 to the caliper mounting part of the wheel suspension device to which the axial mount type caliper body 2 is attached, and the radial mount type caliper body can be mounted to a wider range of wheel suspension devices, including the caliper mounting part of the axial mount type wheel suspension device. Furthermore, by changing the shape of the caliper bracket 4, the mounting position of the caliper body 2 can be adjusted according to the size of the outer diameter of the disc rotor 5 and the changes in the dimensions of the wheel suspension device, improving the layout.

Furthermore, the caliper bracket 4 is disposed on the vehicle body outer side of the caliper mounting parts 3a, 3a, and the fastening member 10 is disposed on the vehicle body inner side of the caliper mounting parts 3a, 3a, and the male threaded parts 8a, 8a of the vehicle body mounting bolts 9, 9 inserted through the vehicle body mounting holes 4e, 4e and the bracket mounting holes 3b, 3b are fastened to the fastening member 10 to mount the caliper bracket 4 to the caliper mounting parts 3a, 3a, thereby increasing the mounting rigidity of the caliper bracket 4 without being affected by the clearance between the caliper mounting parts 3a, 3a and the disc rotor 5. In addition, since the mounting rigidity of the caliper bracket can be increased, even if the caliper body 2 receives a rotational moment generated in the disc rotation direction during braking, the rotational moment can be reliably received by the caliper body and the caliper bracket, and the movement of the caliper body 2 can be suppressed.

Furthermore, the fastening member 10 is integrally formed with two female threaded portions 10a, 10a that are respectively positioned at positions corresponding to the bracket mounting holes 3b, 3b, and a connecting portion 10b that connects these female threaded portions 10a, 10a, which makes it easy to assemble the caliper bracket 4 and allows the caliper bracket 4 to be assembled to the caliper mounting portions 3a, 3a with high precision.

The present invention is not limited to the above-mentioned embodiment, and the number of cylinder holes formed in the caliper body can be any number. In addition, the shapes of the vehicle body mounting arm and the caliper body mounting arm of the caliper bracket can be formed into any shape according to the size and shape of the caliper body. Furthermore, the fastening member does not have to connect the female threaded portion with a connecting portion.

1...vehicle disc brake, 2...caliper body, 2a...action portion, 2b...bridge portion, 2c...cylinder hole, 2d...mounting boss portion, 2e...bolt insertion hole, 3...front fork, 3a...caliper mounting portion, 3b...bracket mounting hole, 4...caliper bracket, 4a...vehicle body mounting arm, 4b...caliper body mounting arm, 4c...female thread hole, 4d...boss portion, 4e...vehicle body mounting hole, 5...disc rotor, 6...friction pad, 7...piston, 8...caliper mounting bolt, 8a...male thread portion, 9...vehicle body mounting bolt, 9a...male thread portion, 10...fastening member, 10a...female thread portion, 10b...connecting portion

Claims (1)

a caliper body mounting structure for a vehicle disc brake, in which a caliper body is mounted to a caliper mounting section provided on a wheel suspension by using a caliper mounting bolt inserted into the bolt insertion hole, the caliper body mounting structure comprising: a vehicle body mounting arm having a vehicle body mounting hole in the disc axial direction mounted to the caliper mounting section; and a caliper mounting arm extending from an end of the vehicle body mounting arm on an inner side in the disc radial direction and having a caliper mounting hole in a direction perpendicular to the disc axis to which the caliper body is attached; a bracket mounting hole in the disc axial direction is formed in the caliper mounting section; a vehicle body mounting bolt is fastened between the vehicle body mounting hole and the bracket mounting hole; and the caliper body is mounted to the caliper mounting section via the caliper bracket by fastening the caliper mounting bolt between the bolt insertion hole and the caliper mounting hole;
the vehicle body mounting arm of the caliper bracket is disposed on the vehicle body outer side of the caliper mounting portion, and a plate-shaped fastening member having an internal thread portion which screws into the external thread portion of the vehicle body mounting bolt is disposed at a position corresponding to the bracket mounting hole on the vehicle body inner side of the caliper mounting portion, and the caliper bracket is attached to the caliper mounting portion by fastening the external thread portion of the vehicle body mounting bolt which has been inserted through the vehicle body mounting hole and the bracket mounting hole to the internal thread portion;
A plurality of bracket mounting holes are formed, and the fastening member has female threads that are arranged at positions corresponding to the plurality of bracket mounting holes and are integrally formed with the fastening member via a connecting portion.
1. A vehicle disc brake caliper body mounting structure comprising:

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