Vehicle disc brakes

Abstract

To support a disk turn-in side caliper support arm and a disk turn-out side caliper support arm by a connection body provided between a caliper bracket and a knuckle and to secure strength and rigidity of those caliper support arms.SOLUTION: A caliper bracket 7 comprises a disk turn-in side caliper support arm 7a and a disk turn-out side caliper support arm 7b comprising a torque reception part. A steering knuckle 2 is provided with a connection body 8 in one body, and the connection body 8 comprises a disk turn-in side connection part 8a connecting the disk turn-in side caliper support arm 7a and a lower arm connection part 2c, and a disk turn-out side connection part 8b connecting the disk turn-out side caliper support arm 7b and a damper connection part 2b. The disk turn-out side connection part 8b is provided with a knuckle-side connection part B1 more on a caliper bracket-side disk turn-in side than a caliper bracket-side connection part B2, and the disk turn-out side connection part 8b is provided with a knuckle-side connection part B3 more on a disk turn-out side than a caliper bracket-side connection part B4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a disc brake for a vehicle, and more particularly to a disc brake for a vehicle in which a caliper body is attached to a knuckle via a caliper bracket. [Background technology]

[0002] Conventionally, a vehicle disc brake includes a knuckle that supports the axle, a disc rotor that is attached to the knuckle and rotates integrally with the wheel, a pair of friction pads that clamp the sides of the disc rotor to apply braking force, a caliper body having a piston that presses the friction pads against the sides of the disc rotor, and a caliper bracket that is interposed between the caliper body and the knuckle.

[0003] The caliper bracket supports the disk rotation in side and disk rotation out side of the caliper body when the vehicle moves forward, and connects the disk rotation in side caliper support arm and the disk rotation out side caliper support arm that receive the braking torque generated during braking, and connects the disk rotation in side caliper support arm and the disk rotation out side caliper support arm to each other on the inside and outside of the vehicle body (see, for example, Patent Document 1). There was also a caliper bracket formed integrally with the main body of the knuckle that supports the axle (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 2780178 [Patent Document 2] Patent No. 4375969 Summary of the Invention [Problem to be solved by the invention]

[0005] The disc rotation-in side caliper support arm and the disc rotation-out side caliper support arm of the caliper bracket of the vehicle disc brake described in the above-mentioned Patent Documents 1 and 2 are required to have appropriate strength and rigidity so that they can effectively receive the braking torque.

[0006] Therefore, the present invention aims to provide a vehicle disc brake that supports a disc rotation side caliper support arm and a disc rotation side caliper support arm with a connecting body installed between the caliper bracket and the knuckle, thereby ensuring the strength and rigidity of the disc rotation side caliper support arm and the disc rotation side caliper support arm. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a vehicle disc brake comprising: a knuckle for supporting an axle of a wheel; a disc rotor attached to the knuckle so as to be rotatable integrally with the wheel; a pair of friction pads disposed opposite each side of the disc rotor; a caliper body having a piston for pressing the friction pads against the disc rotor; and a caliper bracket interposed between the caliper body and the knuckle, wherein the caliper bracket and the knuckle are: Integral with the caliper bracketThe caliper bracket is connected via a connecting body formed on the caliper bracket, and the caliper bracket includes a disc rotation side caliper support arm that supports the disc rotation side of the caliper body when the vehicle moves forward, and a disc rotation exit side caliper support arm that supports the disc rotation exit side of the caliper body when the vehicle moves forward. The disc rotation side caliper support arm and the disc rotation exit side caliper support arm are each provided with a torque receiving portion that abuts against the friction pad during braking to receive braking torque. The connecting body includes a disc rotation side connecting portion that connects the disc rotation side caliper support arm and the knuckle, and a disc rotation exit side connecting portion that connects the disc rotation exit side caliper support arm and the knuckle. The disc rotation side connecting portion has a knuckle side connecting portion that is provided on the disc rotation side relative to the caliper bracket side connecting portion, and the disc rotation exit side connecting portion has a knuckle side connecting portion that is provided on the disc rotation exit side relative to the caliper bracket side connecting portion. The connecting body includes an intermediate connecting portion between the disk rotation inlet side connecting portion and the disk rotation outlet side connecting portion, the intermediate connecting portion connecting the knuckle and the caliper bracket. It is characterized by the following.

[0008] The vehicle disc brake of the present invention comprises a knuckle for supporting an axle of a wheel, a disc rotor attached to the knuckle so as to be rotatable integrally with the wheel, a pair of friction pads arranged opposite each other on both sides of the disc rotor, a caliper body having a piston for pressing the friction pads against the disc rotor, and a caliper bracket interposed between the caliper body and the knuckle, wherein the caliper bracket and the knuckle are connected via a connecting body formed integrally with the knuckle, and the caliper bracket comprises a disc rotation side caliper support arm for supporting a disc rotation side of the caliper body when the vehicle is moving forward, and a caliper support arm for supporting a disc rotation side of the caliper body when the vehicle is moving forward. and a disk rotation exit caliper support arm that supports the disk rotation exit side when braking, and the disk rotation entry caliper support arm and the disk rotation exit caliper support arm are each provided with a torque receiving portion that abuts against the friction pad during braking to receive braking torque, and the connecting body includes a disk rotation entry side connecting portion that connects the disk rotation entry side caliper support arm and the knuckle, and a disk rotation exit side connecting portion that connects the disk rotation exit side caliper support arm and the knuckle, and the disk rotation entry side connecting portion has a knuckle side connecting portion that is provided on the disk rotation entry side relative to the caliper bracket side connecting portion, and the disk rotation exit side connecting portion has a knuckle side connecting portion that is provided on the disk rotation exit side relative to the caliper bracket side connecting portion. Furthermore, the connecting body includes an intermediate connecting portion that connects the knuckle and the caliper bracket between the disk rotation entry side connecting portion and the disk rotation exit side connecting portion. The intermediate connection portion connects the disk inlet side connection portion and the disk outlet side connection portion. This is preferable.

[0009] Furthermore, it is preferable that the intermediate connecting portion includes a first intermediate connecting member connecting an intermediate position of the knuckle corresponding to an intermediate position between the disc rotation side connecting portion and the disc rotation side connecting portion and the disc rotation side caliper support arm, and a second intermediate connecting member connecting the intermediate position of the knuckle and the disc rotation side caliper support arm.

[0010] In addition, the knuckle is a steering knuckle having a main body portion supporting the axle, a damper connecting portion protruding from one side of the main body portion, and a lower arm connecting portion protruding from the other side of the main body portion, and the disc rotation entrance side connecting portion is connected to either the damper connecting portion or the lower arm connecting portion, and the disc rotation exit side connecting portion is connected to the other of the damper connecting portion or the lower arm connecting portion.

[0011] Furthermore, the knuckle is a rear knuckle having a main body portion supporting the axle, an upper arm connecting portion protruding from one side of the main body portion, and a lower arm connecting portion protruding from the other side of the main body portion, and the disc rotation entry side connecting portion is connected to either the upper arm connecting portion or the lower arm connecting portion, and the disc rotation exit side connecting portion is connected to the other of the upper arm connecting portion or the lower arm connecting portion. Effect of the Invention

[0012] According to the vehicle disc brake of the present invention, the disc rotation-in caliper support arm and the disc rotation-out caliper support arm, which are subjected to braking torque during braking, can be supported by a connecting body that connects the knuckle and the caliper bracket. This ensures the strength and rigidity of the disc rotation-in caliper support arm and the disc rotation-out caliper support arm, and the disc rotation-in caliper support arm and the disc rotation-out caliper support arm can receive the braking torque well. Furthermore, the braking torque applied to the disc rotation-in caliper support arm and the disc rotation-out caliper support arm can be transmitted to the connecting body or the knuckle and released. In addition, the disc rotation entry side connection portion of the connecting body is arranged so that the connection portion on the knuckle side is closer to the disc rotation entry side than the connection portion on the caliper bracket side, and the disc rotation exit side connection portion is arranged so that the connection portion on the knuckle side is closer to the disc rotation exit side than the connection portion on the caliper bracket side, so that the disc rotation entry side caliper support arm and the disc rotation exit side caliper support arm can be effectively supported by the disc rotation entry side connection portion and the disc rotation exit side connection portion.

[0013] Furthermore, since the disc rotation side connecting part and the disc rotation side connecting part ensure the strength and rigidity for the disc rotation side caliper support arm and the disc rotation side caliper support arm to effectively receive braking torque, it is possible to omit or miniaturize the tie bar that connects the inside of the vehicle body of the disc rotation side caliper support arm and the disc rotation side caliper support arm, which was previously provided to ensure the rigidity of the disc rotation side caliper support arm and the disc rotation side caliper support arm, thereby making it possible to reduce the weight of the caliper bracket.

[0014] In addition, the connecting body has an intermediate connecting portion that connects the knuckle and the caliper bracket between the disc rotation entry side connecting portion and the disc rotation exit side connecting portion, thereby improving the connection strength between the knuckle and the caliper bracket.

[0015] Furthermore, the intermediate connecting portion includes a first intermediate connecting member connecting the intermediate position of the knuckle and the disc rotation side caliper support arm, and a second intermediate connecting member connecting the intermediate position of the knuckle and the disc rotation side caliper support arm, thereby enabling the intermediate connecting portion to provide good support for the disc rotation side connecting portion and the disc rotation side connecting portion, thereby improving the connection strength between the knuckle and the caliper bracket.

[0016] The knuckle is a steering knuckle having a damper connecting portion protruding from one side of the main body portion supporting the wheel and a lower arm connecting portion protruding from the other side, and the disc rotation entry side connecting portion is connected to either the damper connecting portion or the lower arm connecting portion, and the disc rotation exit side connecting portion is connected to either the damper connecting portion or the lower arm connecting portion, so that the disc rotation entry side caliper support arm and the disc rotation exit side caliper support arm, to which braking torque is applied during braking, are supported by the disc rotation entry side connecting portion and the disc rotation exit side connecting portion, and the strength and rigidity of the disc rotation entry side caliper support arm and the disc rotation exit side caliper support arm can be ensured, and the braking torque can be well received. Furthermore, the braking torque applied to the disc rotation entry side caliper support arm and the disc rotation exit side caliper support arm can be transmitted to the disc rotation entry side connecting portion, the damper connecting portion, the disc rotation exit side connecting portion, and the lower arm connecting portion, and released.

[0017] The knuckle is a rear knuckle having an upper arm connecting portion protruding from one side of the main body portion supporting the wheel and a lower arm connecting portion protruding from the other side, and the disc rotation-in side connecting portion is connected to either the upper arm connecting portion or the lower arm connecting portion, and the disc rotation-out side connecting portion is connected to either the upper arm connecting portion or the lower arm connecting portion, so that the disc rotation-in side caliper support arm and the disc rotation-out side caliper support arm, to which braking torque is applied during braking, are supported by the disc rotation-in side connecting portion and the disc rotation-out side connecting portion, and the strength and rigidity of the disc rotation-in side caliper support arm and the disc rotation-out side caliper support arm can be ensured, and the braking torque can be well received. Furthermore, the braking torque applied to the disc rotation-in side caliper support arm and the disc rotation-out side caliper support arm can be transmitted to the disc rotation-in side connecting portion, the upper arm connecting portion, the disc rotation-out side connecting portion, and the lower arm connecting portion, and released. [Brief description of the drawings]

[0018] [Figure 1] 1 is a front view of a vehicle disc brake showing a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Diagram 3] FIG. 4 is a front view of a vehicle disc brake showing a second embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. [Diagram 5] FIG. 11 is a front view of a vehicle disc brake showing a third embodiment of the present invention. [Figure 6] 6 is a cross-sectional view taken along line VI-VI of FIG. 5. [Figure 7] FIG. 11 is a front view of a vehicle disc brake showing a fourth embodiment of the present invention. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] 1 to 8 are diagrams showing various embodiments of the vehicle disc brake of the present invention, in which the arrow A indicates the rotation direction of the disc rotor that rotates together with the wheel when the vehicle moves forward, and the disc rotation out side and disc rotation in side described below are those when the vehicle moves forward. Furthermore, the symbol FR in the diagrams indicates the front of the vehicle body, and the symbol UP indicates the upper side of the vehicle body.

[0020] 1 and 2 show a vehicle disc brake 1 for a right front wheel, showing a first embodiment of this embodiment, which includes a steering knuckle 2 supporting the axle of the front wheel, a disc rotor 3 attached to the steering knuckle 2 via a hub unit (not shown) so as to be rotatable integrally with the front wheel, a pair of friction pads 4, 4 arranged opposite each other on both sides of the disc rotor 3, a caliper body 6 having a piston 5 for pressing the friction pad 4 against the side of the disc rotor, and a caliper bracket 7 interposed between the caliper body 6 and the steering knuckle 2. The caliper bracket 7 is connected to the steering knuckle 2 via a connector 8 provided on the vehicle body rear side of the steering knuckle 2, and the caliper body 6 is arranged on the vehicle body rear side of the disc rotor 3 via the connector 8 and the caliper bracket 7.

[0021] The caliper body 6 is composed of an action part 6a and a reaction part 6b arranged on both sides of the disk rotor 3, and a bridge part 6c connecting them across the outer edge of the disk rotor 3. The action part 6a has a cylinder hole 6d that opens to the disk rotor 3 side, and the reaction part 6b has reaction claws 6e, 6e. The cylinder hole 6d accommodates the piston 5, which has a bottom and is cylindrical, and the piston 5 moves in the cylinder hole 6d in the disk axial direction by the hydraulic pressure supplied to a hydraulic pressure chamber 6f defined at the bottom of the cylinder hole. Slide pin attachment arms 6g, 6g are protruding from the disk rotation-in side and the disk rotation-out side of the action part 6a, and a slide pin 6h is attached to the tip of each slide pin attachment arm 6g.

[0022] The caliper bracket 7 includes a disk rotation-in side caliper support arm 7a and a disk rotation-out side caliper support arm 7b that support the disk rotation-in side and disk rotation-out side of the caliper body 6, and a tie bar 7c that connects the vehicle body outer side of the disk rotation-in side caliper support arm 7a and the vehicle body outer side of the disk rotation-out side caliper support arm 7b. The disk rotation-in side caliper support arm 7a and the disk rotation-out side caliper support arm 7b are arranged on either side of both sides of the caliper body 6 in the disk rotation direction, and are formed into a saddle shape that straddles the outer periphery of the disk rotor 3. The disk rotation-in side caliper support arm 7a and the disk rotation-out side caliper support arm 7b each have a pin insertion hole through which the slide pin 6h is slidably inserted, and the caliper body 6 is attached to the caliper bracket 7 so as to be movable in the disk axial direction via the slide pin 6h inserted into the pin insertion hole (not shown). Furthermore, a U-shaped pad guide groove 7d is formed in each of the disc rotation side caliper support arm 7a and the disc rotation side caliper support arm 7b, and the disc rotation side surface 7e of the pad guide groove 7d on the disc rotation side and the disc rotation side surface 7f of the pad guide groove 7d on the disc rotation side serve as torque receiving portions that receive braking torque from the friction pad 4 during braking.

[0023] The friction pad 4 comprises a back plate 4a and a lining 4b attached to the disk rotor side of the back plate 4a. Ears 4c, 4c are protruding from both sides of the back plate 4a, and the ears 4c, 4c are supported in the pad guide grooves 7d on the disk rotation inlet side and the disk rotation outlet side, respectively, so as to be movable in the disk axial direction.

[0024] The steering knuckle 2 includes a cylindrical main body 2a that rotatably supports the axle of the front wheel, a damper connecting portion 2b that protrudes from the main body 2a toward the upper side of the vehicle body, a lower arm connecting portion 2c that protrudes from the main body 2a toward the lower side of the vehicle body, and a steering rod connecting portion 2d that protrudes from the main body 2a toward the front side of the vehicle body. The substantially disk-shaped disc rotor 3 is fixed to the main body 2a via a hub unit so as to be rotatable integrally with the front wheel.

[0025] The connector 8 is formed integrally with the steering knuckle 2, and includes a disk rotation-in side connector 8a that connects the disk rotation-in side caliper support arm 7a of the caliper bracket 7 to the lower arm connector 2c of the steering knuckle 2, and a disk rotation-out side connector 8b that connects the disk rotation-out side caliper support arm 7b of the caliper bracket 7 to the damper connector 2b of the steering knuckle 2. The disk rotation-in side connector 8a protrudes from the lower arm connector 2c toward the rear of the vehicle body and is attached to the disk rotation-in side caliper support arm 7a by a connector bolt 9a, and a connector B1 with the lower arm connector 2c is provided on the disk rotation side of the connector B2 (position of the connector bolt 9a) with the disk rotation-in side caliper support arm 7a. Furthermore, the disc rotation side connection part 8b protrudes toward the rear of the vehicle body from the damper connection part 2b and is attached to the disc rotation side caliper support arm 7b by a connecting bolt 9b, and the connection part B3 with the damper connection part 2b is located on the disc rotation side of the connection part B4 with the disc rotation side caliper support arm 7b (the position of the connecting bolt 9b).

[0026] Furthermore, between the disc rotation entrance side connecting portion 8a and the disc rotation exit side connecting portion 8b, there are provided an intermediate position 2e on the rear side of the vehicle body of the main body portion 2a corresponding to the intermediate position between the disc rotation entrance side connecting portion 8a and the disc rotation exit side connecting portion 8b, a first intermediate connecting member 8c which connects the intermediate position 2e to the disc rotation entrance side caliper support arm 7a, and a second intermediate connecting member 8d which connects the intermediate position 2e to the disc rotation exit side caliper support arm 7b, and the connecting body 8 is formed in an M shape when viewed from the front by the disc rotation entrance side connecting portion 8a, the disc rotation exit side connecting portion 8b, the first intermediate connecting member 8c, and the second intermediate connecting member 8d.

[0027] In the above-mentioned vehicle disc brake 1, when the driver applies the brakes while the vehicle is moving forward, hydraulic fluid pressurized by a separate hydraulic master cylinder (not shown) is supplied to the hydraulic chamber 6f of the caliper body 6. The hydraulic fluid supplied to the hydraulic chamber 6f pushes the piston 5 toward the disc rotor 3, causing the friction pad 4 on the action side to slide against one side of the disc rotor 3, and then the caliper body 6 moves toward the action side, causing the reaction claws 6e, 6e to slide the friction pad 4 on the reaction side to slide against the other side of the disc rotor 3, thereby performing braking action.

[0028] At this time, each friction pad 4 is dragged by the disc rotor 3, and one end surface of the back plate 4a abuts against the disc rotation side surface 7e (torque receiving portion) of the pad guide groove 7d on the disc rotation side. As a result, a braking torque is applied to the disc rotation side caliper support arm 7b, but since the disc rotation side caliper support arm 7b is supported by the disc rotation side connecting portion 8b and has sufficient strength and rigidity, the braking torque can be well received by the disc rotation side caliper support arm 7b. In addition, the braking torque can be transmitted from the disc rotation side caliper support arm 7b to the disc rotation side connecting portion 8b, and from the disc rotation side connecting portion 8b to the damper connecting portion 2b, and released.

[0029] On the other hand, when the driver applies the brakes while the vehicle is moving backward, each friction pad 4 is dragged by the disc rotor 3, and the other end surface of the back plate 4a comes into contact with the disc rotation side surface 7f (torque receiving portion) of the pad guide groove 7d on the disc rotation side. As a result, a braking torque is applied to the disc rotation side caliper support arm 7a, but since the disc rotation side caliper support arm 7a is supported by the disc rotation side connecting portion 8a and has sufficient strength and rigidity, the disc rotation side caliper support arm 7a can receive the braking torque well. In addition, the braking torque can be transmitted from the disc rotation side caliper support arm 7a to the disc rotation side connecting portion 8a, and from the disc rotation side connecting portion 8a to the lower arm connecting portion 2c, and released.

[0030] Furthermore, in this embodiment, the disc rotation side connection portion 8a has a connection portion B1 (knuckle side connection portion) with the lower arm connection portion 2c which is located on the disc rotation side relative to the connection portion B2 (caliper bracket side connection portion) with the disc rotation side caliper support arm 7a, and the disc rotation exit side connection portion 8b has a connection portion B3 (knuckle side connection portion) with the damper connection portion 2b which is located on the disc exit side relative to the connection portion B4 (caliper bracket side connection portion) with the disc rotation exit side caliper support arm 7b, so that the disc rotation entry side caliper support arm 7a and the disc rotation exit side caliper support arm 7b can be effectively supported by the disc rotation entry side connection portion 8a and the disc rotation exit side connection portion 8b.

[0031] In addition, between the disc rotation entrance side connecting portion 8a and the disc rotation exit side connecting portion 8b, the connecting body 8 is provided with a first intermediate connecting member 8c that connects an intermediate position 2e of the main body portion 2a corresponding to the intermediate position between the disc rotation entrance side connecting portion 8a and the disc rotation exit side connecting portion 8b and the disc rotation entrance side caliper support arm 7a, and a second intermediate connecting member 8d that connects the intermediate position 2e and the disc rotation exit side caliper support arm 7b.Since the disc rotation entrance side connecting portion 8a, the disc rotation exit side connecting portion 8b, the first intermediate connecting member 8c, and the second intermediate connecting member 8d are formed in an M-shape when viewed from the front, the connection strength between the steering knuckle 2 and the caliper bracket 7 can be improved.

[0032] Furthermore, since the connecting body 8 ensures the rigidity of the disc rotation side caliper support arm 7a and the disc rotation side caliper support arm 7b, it is possible to omit the tie bar that connects the inside of the vehicle body of the disc rotation side caliper support arm and the disc rotation side caliper support arm, which was previously provided to ensure the rigidity of the disc rotation side caliper support arm and the disc rotation side caliper support arm, and the caliper bracket 7 can be made lighter.

[0033] 3 and 4 show a vehicle disc brake 11 according to a second embodiment of the present invention, in which the same components as those in the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0034] The connecting body 12 in this embodiment is formed integrally with the caliper bracket 7 and is formed in an M-shape when viewed from the front, and is provided with a disk rotation side connecting portion 12a that connects the disk rotation side caliper support arm 7a and the lower arm connecting portion 2c of the steering knuckle 2, a disk rotation side connecting portion 12b that connects the disk rotation side caliper support arm 7b and the damper connecting portion 2b of the steering knuckle 2, a first intermediate connecting member 12c that connects an intermediate position 2e at the rear of the vehicle body of the main body portion 2a to the disk rotation side caliper support arm 7a, and a second intermediate connecting member 12d that connects the intermediate position 2e and the disk rotation side caliper support arm 7b.

[0035] The disk rotation-in side connecting portion 12a protrudes toward the front of the vehicle body from the disk rotation-in side caliper support arm 7a and is attached to the lower arm connecting portion 2c by a connecting bolt 9c, and a connecting portion C1 (position of the connecting bolt 9c) with the lower arm connecting portion 2c is provided on the disk rotation-in side from a connecting portion C2 between the disk rotation-in side caliper support arm 7a and the disk rotation-in side connecting portion 12a. Furthermore, the disk rotation-out side connecting portion 12b protrudes toward the front of the vehicle body from the disk rotation-out side caliper support arm 7b and is attached to the damper connecting portion 2b by a connecting bolt 9d, and a connecting portion C3 (position of the connecting bolt 9d) with the damper connecting portion 2b is provided on the disk rotation-out side from a connecting portion C4 between the disk rotation-out side caliper support arm 7b and the disk rotation-out side connecting portion 12b. Furthermore, the first intermediate connecting member 12c and the second intermediate connecting member 12d are connected to the intermediate position 2e by a connecting bolt 10a.

[0036] In addition, in the first and second embodiments, the connecting body 8 or the connecting body 12 is provided on the rear side of the steering knuckle 2 in the vehicle body, but the present invention is not limited to this, and can also be applied to an arrangement in which the connecting body 8 or the connecting body 12 is provided on the front side of the vehicle body of the steering knuckle 2, and the caliper body 6 is disposed on the front side of the vehicle body of the disc rotor 3 via the connecting body 8 or the connecting body 12 and the caliper bracket 7.

[0037] 5 and 6 show a vehicle disc brake 21 according to a third embodiment of the present invention, in which the same components as those in the first embodiment are given the same reference numerals and detailed description thereof will be omitted.

[0038] The vehicle disc brake 21 in this embodiment is a disc brake for the left rear wheel, and comprises a rear knuckle 22 that supports the axle of the rear wheel, a disc rotor 3 that is attached to the rear knuckle 22 via a hub unit so as to be rotatable integrally with the rear wheel, a pair of friction pads 4, 4 that clamp the sides of the disc rotor 3 to brake the rear wheel, a caliper body 6 having a piston 5 that presses the friction pad 4 against the side of the disc rotor, and a caliper bracket 7 for attaching the caliper body 6 to the rear knuckle 22, and the caliper bracket 7 is connected to the rear knuckle 22 via a connector 23.

[0039] The rear knuckle 22 includes a main body 22a that rotatably supports the axle of the rear wheel, upper arm connectors 22b, 22b, a lower arm connector 22c, trailing arm connectors 22d, 22d, and control arm connectors 22e, 22e. The main body 22a is formed in a substantially rectangular shape with an axle support portion 22f in the center, and the upper arm connectors 22b, 22b protrude upward from the front upper portion of the main body 22a, and the lower arm connector 22c protrudes downward from the rear lower portion of the main body 22a. Furthermore, the trailing arm connectors 22d, 22d protrude forward from the front of the main body 22a, and the control arm connectors 22e, 22e protrude downward from the front lower portion of the main body 22a.

[0040] The connecting body 23 is formed integrally with the rear knuckle 22 and includes a disc rotation exit side connecting portion 23a that connects the disc rotation exit side caliper support arm 7b of the caliper bracket 7 to the upper arm connecting portion 22b on the rear side of the vehicle body of the rear knuckle 22, and a disc rotation entry side connecting portion 23b that connects the disc rotation entry side caliper support arm 7a of the caliper bracket 7 to the lower arm connecting portion 22c of the rear knuckle 22.

[0041] The disc rotation exit side connecting portion 23a protrudes toward the rear of the vehicle body from the upper arm connecting portion 22b on the rear side of the vehicle body and is attached to the disc rotation exit side caliper support arm 7b by a connecting bolt 9e, and a connecting portion D1 with the upper arm connecting portion 22b is provided on the disc rotation exit side of the connecting portion D2 (position of the connecting bolt 9e) with the disc rotation exit side caliper support arm 7b. The disc rotation entry side connecting portion 23b protrudes toward the upper side of the vehicle body from the lower arm connecting portion 22c and is attached to the disc rotation entry side caliper support arm 7a by a connecting bolt 9f, and a connecting portion D3 with the lower arm connecting portion 22c is provided on the disc rotation entry side of the connecting portion D4 (position of the connecting bolt 9f) with the disc rotation entry side caliper support arm 7a. Furthermore, between the disc rotation side connection portion 23a and the disc rotation side connection portion 23b, there is provided a first intermediate connection member 23c which connects an intermediate position 22g on the rear side of the vehicle body of the main body portion 22a corresponding to the intermediate position between the disc rotation side connection portion 23a and the disc rotation side connection portion 23b and the disc rotation side caliper support arm 7b, and a second intermediate connection member 23d which connects the intermediate position 22g and the disc rotation side caliper support arm 7a, and the connection body 23 is formed in an M shape when viewed from the front by the disc rotation side connection portion 23a, the disc rotation side connection portion 23b, the first intermediate connection member 23c and the second intermediate connection member 23d.

[0042] In this embodiment, as described above, the disc brake for the rear wheels is supported by the disc rotation exit side connecting portion 23a and the disc rotation entry side connecting portion 23b, so that the strength and rigidity of the disc rotation entry side caliper support arm 7a and the disc rotation exit side caliper support arm 7b, which are subjected to the braking torque during braking, can be ensured, and the disc rotation entry side caliper support arm 7a and the disc rotation exit side caliper support arm 7b can be favorably received by the disc rotation entry side caliper support arm 7a and the disc rotation exit side caliper support arm 7b. Furthermore, the braking torque applied to the disc rotation entry side caliper support arm 7a and the disc rotation exit side caliper support arm 7b can be transmitted to the disc rotation exit side connecting portion 23a, the upper arm connecting portion 22b, the disc rotation entry side connecting portion 23b, and the lower arm connecting portion 22c, and released.

[0043] 7 and 8 show a vehicle disc brake 31 according to a fourth embodiment of the present invention, in which the same components as those in the first and third embodiments are given the same reference numerals and detailed descriptions thereof are omitted.

[0044] The connecting body 32 of the present invention is formed integrally with the caliper bracket 7, and is provided with a disk rotation side connecting portion 32b that connects the disk rotation side caliper support arm 7a and the lower arm connecting portion 22c of the rear knuckle 22, a disk rotation exit side connecting portion 32a that connects the disk rotation exit side caliper support arm 7b and the upper arm connecting portion 22b on the rear side of the vehicle body of the rear knuckle 22, a first intermediate connecting member 32c that connects an intermediate position 22g on the rear side of the vehicle body of the main body portion 22a to the disk rotation exit side caliper support arm 7b, and a second intermediate connecting member 32d that connects the intermediate position 22g to the disk rotation entry side caliper support arm 7a, and the connecting body 32 is formed in an M shape when viewed from the front by the disk rotation exit side connecting portion 32a, the disk rotation entry side connecting portion 32b, the first intermediate connecting member 32c, and the second intermediate connecting member 32d.

[0045] The disk rotation exit side connecting portion 32a protrudes from the disk rotation exit side caliper support arm 7b toward the front of the vehicle body and is attached to the upper arm connecting portion 22b at the rear of the vehicle body by a connecting bolt 9g, and a connecting portion E1 (position of the connecting bolt 9g) with the upper arm connecting portion 22b is provided on the disk rotation exit side from a connecting portion E2 with the disk rotation exit side caliper support arm 7b. The disk rotation entry side connecting portion 32b protrudes from the disk rotation entry side caliper support arm 7a toward the bottom of the vehicle body and is attached to the lower arm connecting portion 22c by a connecting bolt 9h, and a connecting portion E3 (position of the connecting bolt 9h) with the lower arm connecting portion 22c is provided on the disk rotation entry side from a connecting portion E4 with the disk rotation entry side caliper support arm 7a. The first intermediate connecting member 32c and the second intermediate connecting member 32d are connected to the intermediate position 22g by a connecting bolt 10b.

[0046] The present invention is not limited to the above-mentioned embodiments, and the caliper body and friction pad structures may be any structure, and the steering knuckle and rear knuckle may be any structure. Furthermore, the connecting body may not include the first intermediate connecting member and the second intermediate connecting member. Furthermore, the present invention may be applied to a disk brake for a parking brake. [Explanation of symbols]

[0047] 1...vehicle disc brake, 2...steering knuckle, 2a...main body, 2b...damper connection portion, 2c...lower arm connection portion, 2d...steering rod connection portion, 2e...intermediate position, 3...disc rotor, 4...friction pad, 4a...back plate, 4b...lining, 4c...ear, 5...piston, 6...caliper body, 6a...action portion, 6b...reaction portion, 6c...bridge portion, 6d...cylinder hole, 6e...reaction claw, 6 f...hydraulic pressure chamber, 6g...slide pin mounting arm, 6h...slide pin, 7...caliper bracket, 7a...disc rotation-in side caliper support arm, 7b...disc rotation-out side caliper support arm, 7c...tie bar, 7d...pad guide groove, 7e...disc rotation-out side, 7f...disc rotation-in side, 8...connecting body, 8a...disc rotation-in side connecting portion, 8b...disc rotation-out side connecting portion, 8c...first intermediate connecting member, 8d...second intermediate connecting member , 9a to 9h... connecting bolts, 10a, 10b... connecting bolts, 11... vehicle disc brake, 12... connecting body, 12a... disc rotation inlet side connecting portion, 12b... disc rotation outlet side connecting portion, 12c... first intermediate connecting portion, 12d... second intermediate connecting portion, 21... vehicle disc brake, 22... rear knuckle, 22a... main body portion, 22b... upper arm connecting portion, 22c... lower arm connecting portion, 22d... trailing arm Connecting portion, 22e...control arm connecting portion, 22f...axle support portion, 22g...intermediate position, 23...connecting body, 23a...disc rotation exit side connecting portion, 23b...disc rotation entry side connecting portion, 23c...first intermediate connecting portion, 23d...second intermediate connecting portion, 31...vehicle disc brake, 32...connecting body, 32a...disc rotation exit side connecting portion, 32b...disc rotation entry side connecting portion, 32c...first intermediate connecting member, 32d...second intermediate connecting member

Claims

1. A knuckle that supports the wheel axle; a disk rotor attached to the knuckle so as to be rotatable integrally with the wheel; A pair of friction pads disposed on both sides of the disk rotor so as to face each other; a caliper body having a piston for pressing the friction pad against the disc rotor; a caliper bracket interposed between the caliper body and the knuckle; In a vehicle disc brake comprising: the caliper bracket and the knuckle are connected via a connector formed integrally with the caliper bracket, The caliper bracket includes a disc rotation-in side caliper support arm that supports a disc rotation-in side of the caliper body when the vehicle moves forward, and a disc rotation-out side caliper support arm that supports a disc rotation-out side of the caliper body when the vehicle moves forward, and the disc rotation-in side caliper support arm and the disc rotation-out side caliper support arm are each provided with a torque receiving portion that abuts against the friction pad during braking to receive a braking torque, The connecting body includes a disk rotation-in side connecting portion that connects the disk rotation-in side caliper support arm and the knuckle, and a disk rotation-out side connecting portion that connects the disk rotation-out side caliper support arm and the knuckle, the disk rotation-in side connecting portion has a knuckle-side connecting portion that is closer to the disk rotation-in side than the caliper bracket-side connecting portion, and the disk rotation-out side connecting portion has a knuckle-side connecting portion that is closer to the disk rotation-out side than the caliper bracket-side connecting portion, The connecting body is characterized in that it has an intermediate connecting portion between the disc rotation inlet side connecting portion and the disc rotation outlet side connecting portion, which connects the knuckle and the caliper bracket.

2. A knuckle that supports the wheel axle; a disk rotor attached to the knuckle so as to be rotatable integrally with the wheel; A pair of friction pads disposed on both sides of the disk rotor so as to face each other; a caliper body having a piston for pressing the friction pad against the disc rotor; a caliper bracket interposed between the caliper body and the knuckle; In a vehicle disc brake comprising: the caliper bracket and the knuckle are connected via a connector formed integrally with the knuckle, The caliper bracket includes a disc rotation-in side caliper support arm that supports a disc rotation-in side of the caliper body when the vehicle moves forward, and a disc rotation-out side caliper support arm that supports a disc rotation-out side of the caliper body when the vehicle moves forward, and the disc rotation-in side caliper support arm and the disc rotation-out side caliper support arm are each provided with a torque receiving portion that abuts against the friction pad during braking to receive a braking torque, The connecting body includes a disk rotation-in side connecting portion that connects the disk rotation-in side caliper support arm and the knuckle, and a disk rotation-out side connecting portion that connects the disk rotation-out side caliper support arm and the knuckle, the disk rotation-in side connecting portion has a knuckle-side connecting portion that is closer to the disk rotation-in side than the caliper bracket-side connecting portion, and the disk rotation-out side connecting portion has a knuckle-side connecting portion that is closer to the disk rotation-out side than the caliper bracket-side connecting portion, The connecting body includes an intermediate connecting portion between the disk rotation inlet side connecting portion and the disk rotation outlet side connecting portion, the intermediate connecting portion connecting the knuckle and the caliper bracket, The intermediate connection portion connects the disk inlet side connection portion and the disk outlet side connection portion. A vehicle disc brake comprising:

3. The vehicle disc brake according to claim 1 or 2, characterized in that the intermediate connecting portion includes a first intermediate connecting member connecting an intermediate position of the knuckle corresponding to an intermediate position between the disc rotation side connecting portion and the disc rotation side connecting portion and the disc rotation side caliper support arm, and a second intermediate connecting member connecting the intermediate position of the knuckle and the disc rotation side caliper support arm.

4. 4. A vehicle disc brake as claimed in claim 1, wherein the knuckle is a steering knuckle having a main body portion supporting the axle, a damper connecting portion protruding from one side of the main body portion, and a lower arm connecting portion protruding from the other side of the main body portion, and wherein the disc rotation entry side connecting portion is connected to either the damper connecting portion or the lower arm connecting portion, and the disc rotation exit side connecting portion is connected to the other of the damper connecting portion or the lower arm connecting portion.

5. 4. The vehicle disc brake according to claim 1, wherein the knuckle is a rear knuckle having a main body portion supporting the axle, an upper arm connecting portion protruding from one side of the main body portion, and a lower arm connecting portion protruding from the other side of the main body portion, and wherein the disc rotation entry side connecting portion is connected to one of the upper arm connecting portion and the lower arm connecting portion, and the disc rotation exit side connecting portion is connected to the other of the upper arm connecting portion and the lower arm connecting portion.

Images