JP7619927B2 - Vehicle disc brakes - Google Patents

Description

The present invention relates to a vehicle disc brake, and more specifically to a vehicle disc brake in which a caliper body is attached to a knuckle via a caliper bracket.

Conventionally, a vehicle disc brake includes a knuckle that supports the axle, a disc rotor that is attached to the knuckle and rotates together with the wheel, a pair of friction pads that apply braking by sandwiching the sides of the disc rotor, a caliper body that has 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.

The caliper bracket supports the disk rotation in and disk rotation out of the caliper body when the vehicle is moving forward, and includes a disk rotation in and disk rotation out caliper support arm that receives the braking torque generated during braking, and connects the disk rotation in and disk rotation out caliper support arms on the inside and outside of the vehicle body, respectively (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).

Patent No. 2780178 Patent No. 4375969

The caliper support arms on the disc rotation inlet side and the caliper support arms on the disc rotation outlet side 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 adequately receive braking torque.

The present invention aims to provide a vehicle disc brake that supports the disc rotation inlet caliper support arm and the disc rotation outlet 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 inlet caliper support arm and the disc rotation outlet caliper support arm.

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 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 caliper bracket , and the caliper bracket comprises a disc rotation-in side caliper support arm for supporting a disc rotation-in side of the caliper body when the vehicle is moving forward, and a disc rotation-out side caliper support arm for supporting a disc rotation-out side of the caliper body when the vehicle is moving forward. The disc rotation side caliper support arm and the disc rotation 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 side connecting portion that connects the disc rotation side caliper support arm and the knuckle, the disc rotation side connecting portion having 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 side connecting portion having a knuckle side connecting portion that is provided on the disc rotation side relative to the caliper bracket side connecting portion, and the connecting body includes an intermediate connecting portion that connects the knuckle and the caliper bracket between the disc rotation side connecting portion and the disc rotation side connecting portion .

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 disc rotation side caliper support arm which supports the disc rotation side when braking, and the disc rotation side caliper support arm and the disc rotation side caliper support arm are each provided with a torque receiving portion which abuts against the friction pad during braking to receive braking torque, the connecting body comprises a disc rotation side connecting portion which connects the disc rotation side caliper support arm and the knuckle, and a disc rotation side connecting portion which connects the disc rotation side caliper support arm and the knuckle, the disc rotation side connecting portion being provided with the knuckle side connecting portion being located on the disc rotation side relative to the caliper bracket side connecting portion, and the disc rotation side connecting portion being provided with the knuckle side connecting portion being located on the disc rotation side relative to the caliper bracket side connecting portion. Furthermore, it is preferable that the connecting body has an intermediate connecting portion between the disk rotation entrance side connecting portion and the disk rotation exit side connecting portion, which connects the knuckle and the caliper bracket , and that the intermediate connecting portion connects the disk rotation entrance side connecting portion and the disk rotation exit side connecting portion .

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

The knuckle may be 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 entry side connecting portion may be connected to either the damper connecting portion or the lower arm connecting portion, and the disc rotation exit side connecting portion may be connected to the other of the damper connecting portion or the lower arm connecting portion.

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.

According to the vehicle disc brake of the present invention, the disc rotation side caliper support arm and the disc rotation side 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 side caliper support arm and the disc rotation side caliper support arm, and allows the disc rotation side caliper support arm and the disc rotation side caliper support arm to receive braking torque well. Furthermore, the braking torque applied to the disc rotation side caliper support arm and the disc rotation side caliper support arm can be transmitted to the connecting body or the knuckle and released. In addition, the disc rotation entry side connection part of the connecting body is provided so that the knuckle side connection part is located closer to the disc rotation entry side than the caliper bracket side connection part, and the knuckle side connection part is located closer to the disc rotation exit side than the caliper bracket side connection part, 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 part and the disc rotation exit side connection part.

Furthermore, the disc rotation side connecting part and the disc rotation side connecting part ensure the strength and rigidity of the disc rotation side caliper support arm and the disc rotation side caliper support arm to adequately receive braking torque. This makes it 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 installed 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.

The connecting body also has an intermediate connecting section between the disc rotation entry side connecting section and the disc rotation exit side connecting section that connects the knuckle and the caliper bracket, thereby improving the connection strength between the knuckle and the caliper bracket.

Furthermore, the intermediate connecting portion is provided with a first intermediate connecting member that connects the intermediate position of the knuckle to the caliper support arm on the disc rotation side, and a second intermediate connecting member that connects the intermediate position of the knuckle to the caliper support arm on the disc rotation side. This allows the intermediate connecting portion to provide good support for the disc rotation side connecting portion and the disc rotation side connecting portion, improving the connection strength between the knuckle and the caliper bracket.

The knuckle is a steering knuckle equipped with a damper connecting portion that protrudes from one side of the main body portion that supports the wheel and a lower arm connecting portion that protrudes from the other side. The disc rotation side connecting portion is connected to either the damper connecting portion or the lower arm connecting portion, and the disc rotation side connecting portion is connected to either the damper connecting portion or the lower arm connecting portion. This allows the disc rotation side caliper support arm and the disc rotation side caliper support arm, which are subjected to braking torque during braking, to be supported by the disc rotation side connecting portion and the disc rotation side connecting portion, ensuring the strength and rigidity of the disc rotation side caliper support arm and the disc rotation side caliper support arm, and allowing them to receive braking torque well. Furthermore, the braking torque applied to the disc rotation side caliper support arm and the disc rotation side caliper support arm can be transmitted to the disc rotation side connecting portion, the damper connecting portion, the disc rotation side connecting portion, and the lower arm connecting portion, and released.

The knuckle is a rear knuckle that has an upper arm connecting part that protrudes from one side of the main body that supports the wheel and a lower arm connecting part that protrudes from the other side. The disc rotation side connecting part is connected to either the upper arm connecting part or the lower arm connecting part, and the disc rotation side connecting part is connected to either the upper arm connecting part or the lower arm connecting part. This allows the disc rotation side caliper support arm and the disc rotation side caliper support arm, which are subjected to braking torque during braking, to be supported by the disc rotation side connecting part and the disc rotation side connecting part, ensuring the strength and rigidity of the disc rotation side caliper support arm and the disc rotation side caliper support arm, and allowing them to receive braking torque well. Furthermore, the braking torque applied to the disc rotation side caliper support arm and the disc rotation side caliper support arm can be transmitted to the disc rotation side connecting part, the upper arm connecting part, the disc rotation side connecting part, and the lower arm connecting part, and released.

1 is a front view of a vehicle disc brake showing a first embodiment of the present invention; This is a cross-sectional view of FIG. FIG. 4 is a front view of a vehicle disc brake showing a second embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 11 is a front view of a vehicle disc brake showing a third embodiment of the present invention. FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5 . FIG. 11 is a front view of a vehicle disc brake showing a fourth embodiment of the present invention. FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG.

Figures 1 to 8 show examples of various forms of the vehicle disc brake of the present invention, where 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 refer to the direction when the vehicle moves forward. Furthermore, the symbol FR in the figures indicates the front of the vehicle body, and the symbol UP indicates the upper side of the vehicle body.

Figures 1 and 2 show a right front wheel vehicle disc brake 1, which shows a first embodiment of this embodiment, and includes a steering knuckle 2 that supports the axle of the front wheel, a disc rotor 3 that is attached to the steering knuckle 2 via a hub unit (not shown) so as to be rotatable together with the front wheel, a pair of friction pads 4, 4 that are arranged facing each other on both sides of the disc rotor 3, a caliper body 6 that has a piston 5 that presses the friction pad 4 against the side of the disc rotor, and a caliper bracket 7 that is 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 that is provided on the rear side of the steering knuckle 2, and the caliper body 6 is arranged on the rear side of the disc rotor 3 via the connector 8 and the caliper bracket 7.

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 that connects 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 houses the piston 5, which is cylindrical with a bottom, and the piston 5 moves in the cylinder hole 6d in the disk axial direction by the hydraulic pressure supplied to the hydraulic pressure chamber 6f defined at the bottom of the cylinder hole. In addition, slide pin mounting arms 6g, 6g are protruding from the disk rotation side and disk rotation side of the action part 6a, and a slide pin 6h is attached to the tip of each slide pin mounting arm 6g.

The caliper bracket 7 is provided with a disk-in caliper support arm 7a and a disk-out caliper support arm 7b that support the disk-in and disk-out sides of the caliper body 6, and a tie bar 7c that connects the vehicle body outer side of the disk-in caliper support arm 7a and the vehicle body outer side of the disk-out caliper support arm 7b. The disk-in caliper support arm 7a and the disk-out caliper support arm 7b are arranged on either side of the disk rotation direction of the caliper body 6, and are formed into a saddle shape that straddles the outer circumference of the disk rotor 3. The disk-in caliper support arm 7a and the disk-out caliper support arm 7b each have a pin insertion hole through which the slide pin 6h can be 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 on the disk rotation-in side caliper support arm 7a and the disk rotation-out side caliper support arm 7b, and the disk rotation-out side 7e of the pad guide groove 7d on the disk rotation-out side and the disk rotation-in side 7f of the pad guide groove 7d on the disk rotation-in side serve as torque receiving parts that receive the braking torque from the friction pad 4 during braking.

The friction pad 4 comprises a back plate 4a and a lining 4b that is 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 that they can move in the disk axial direction.

The steering knuckle 2 comprises a cylindrical main body 2a that rotatably supports the axle of the front wheel, a damper connection part 2b that protrudes from the main body 2a toward the upper part of the vehicle body, a lower arm connection part 2c that protrudes from the main body 2a toward the lower part of the vehicle body, and a steering rod connection part 2d that protrudes from the main body 2a toward the front part of the vehicle body. In addition, the approximately disk-shaped disc rotor 3 is fixed to the main body 2a via a hub unit so that it can rotate integrally with the front wheel.

The connector 8 is formed integrally with the steering knuckle 2 and includes a disk rotation side connector 8a that connects the disk rotation 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 side connector 8b that connects the disk rotation side caliper support arm 7b of the caliper bracket 7 to the damper connector 2b of the steering knuckle 2. The disk rotation side connector 8a protrudes toward the rear of the vehicle body from the lower arm connector 2c and is attached to the disk rotation side caliper support arm 7a by a connector bolt 9a, and the 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 side caliper support arm 7a. Furthermore, the disc rotation side connection part 8b protrudes from the damper connection part 2b toward the rear of the vehicle body and is attached to the disc rotation side caliper support arm 7b by a connection 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 connection bolt 9b).

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

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, and the reaction claws 6e, 6e cause the friction pad 4 on the action side to slide against the other side of the disc rotor 3, performing the braking action.

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. This applies a braking torque 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, allowing it to escape.

On the other hand, when the driver applies the brakes while the vehicle is moving backwards, 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. This applies a braking torque 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, allowing it to escape.

Furthermore, in this embodiment, the disc rotation entry side connecting portion 8a has a connecting portion B1 (connecting portion on the knuckle side) with the lower arm connecting portion 2c that is located closer to the disc rotation entry side than the connecting portion B2 (connecting portion on the caliper bracket side) with the disc rotation entry side caliper support arm 7a, and the disc rotation exit side connecting portion 8b has a connecting portion B3 (connecting portion on the knuckle side) with the damper connecting portion 2b that is located closer to the disc rotation exit side than the connecting portion B4 (connecting portion on the caliper bracket side) 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 connecting portion 8a and the disc rotation exit side connecting portion 8b.

The connector 8 is provided with a first intermediate connector 8c between the disk rotation entry connector 8a and the disk rotation exit connector 8b, which connects the disk rotation entry caliper support arm 7a to an intermediate position 2e of the main body 2a corresponding to the intermediate position between the disk rotation entry connector 8a and the disk rotation exit connector 8b, and a second intermediate connector 8d which connects the intermediate position 2e to the disk rotation exit caliper support arm 7b. The disk rotation entry connector 8a, the disk rotation exit connector 8b, the first intermediate connector 8c, and the second intermediate connector 8d are formed in an M-shape when viewed from the front, which improves the connection strength between the steering knuckle 2 and the caliper bracket 7.

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

Figures 3 and 4 show a vehicle disc brake 11 according to a second embodiment of the present invention. Components similar to those in the first embodiment are given the same reference numerals, and detailed descriptions thereof will be omitted.

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 includes a disk-incoming connecting portion 12a that connects the disk-incoming caliper support arm 7a to the lower arm connecting portion 2c of the steering knuckle 2, a disk-outgoing connecting portion 12b that connects the disk-outgoing caliper support arm 7b to the damper connecting portion 2b of the steering knuckle 2, a first intermediate connecting member 12c that connects the intermediate position 2e at the rear of the vehicle body of the main body portion 2a to the disk-incoming caliper support arm 7a, and a second intermediate connecting member 12d that connects the intermediate position 2e to the disk-outgoing caliper support arm 7b.

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 the 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 the 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 the connecting portion C3 (position of the connecting bolt 9d) with the damper connecting portion 2b is provided on the disk rotation-out side from the 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.

In the first and second embodiments, the connector 8 or connector 12 is provided on the rear side of the steering knuckle 2, but the present invention is not limited to this. It can also be applied to a configuration in which the connector 8 or connector 12 is provided on the front side of the steering knuckle 2, and the caliper body 6 is disposed on the front side of the disc rotor 3 via the connector 8 or connector 12 and the caliper bracket 7.

Figures 5 and 6 show a vehicle disc brake 21 according to a third embodiment of the present invention. Components similar to those in the first embodiment are given the same reference numerals, and detailed descriptions thereof will be omitted.

The vehicle disc brake 21 in this embodiment is a disc brake for the left rear wheel, and includes a rear knuckle 22 that supports the rear wheel axle, a disc rotor 3 that is attached to the rear knuckle 22 via a hub unit so that it can rotate together 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 that has 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.

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

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

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

By forming the embodiment as described above, even if it is a rear wheel disc brake, as with a front wheel disc brake, the disc rotation entry side caliper support arm 7a and the disc rotation exit side caliper support arm 7b, which are subjected to braking torque during braking, are supported by the disc rotation exit side connecting part 23a and the disc rotation entry side connecting part 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 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 well received by the braking torque. 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 part 23a, the upper arm connecting part 22b, the disc rotation entry side connecting part 23b, and the lower arm connecting part 22c, and released.

Figures 7 and 8 show a vehicle disc brake 31 according to a fourth embodiment of the present invention. Components similar to those in the first and third embodiments are given the same reference numerals, and detailed descriptions are omitted.

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

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 the 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 the 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 the 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 the 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.

The present invention is not limited to the above-mentioned embodiments, and the caliper body and friction pad structures are optional, as are the steering knuckle and rear knuckle structures. Furthermore, the connecting body does not necessarily have to include the first intermediate connecting member and the second intermediate connecting member. Furthermore, the present invention can also be applied to a disk brake for a parking brake.

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

Claims (5)

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. 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;
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: 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. 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. 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.

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