Brake caliper

Abstract

A brake caliper is installed in a vehicle and includes a body with a brake pad unit and a plurality of first pistons. When the user depresses the vehicle's foot brake pedal, brake fluid pushes the first pistons, causing the brake pad unit to clamp onto the vehicle's disc for braking. The body also has a slidably mounted sliding seat with a braking unit connected to a drive unit. When the user activates the vehicle's electronic parking brake, the drive unit drives the braking unit to slide the sliding seat, causing the brake pad unit to clamp onto the disc for braking. Thus, the brake caliper functions as both a foot brake and an electronic parking brake.

Claims

1. A brake caliper, comprising: a body having a first side seat and a second side seat connected to each other, wherein the first side seat and the second side seat form an accommodating space, wherein, The system includes a plurality of piston chambers communicating with the accommodating space, each piston chamber having a first piston, and the second side seat having a piston hole communicating with the accommodating space. Furthermore, the system includes a flow channel communicating with the piston chambers and a plurality of first guide portions; a brake pad unit is disposed in the accommodating space and has a first brake pad disposed near the first side seat and a second brake pad disposed near the second side seat. A sliding seat, which has a plurality of second guide portions corresponding to the first guide portion, the second guide portions being slidably connected to the first guide portion, so that the sliding seat can slide relative to the body. The sliding seat has a sliding portion disposed adjacent to the second side seat, the sliding portion having a sliding hole corresponding to and communicating with the piston hole, and the sliding portion extending further toward the first side seat with an extension portion, the extension portion further extending into a linkage portion, the linkage portion being located between the first side seat and the first brake pad; a transition seat, which is disposed on the sliding portion and has a shaft hole communicating with the sliding hole; A braking unit has a second piston disposed within the piston hole and the sliding hole. The second piston has a first end facing the accommodating space and a second end opposite to the first end. The second end has a guide groove recessed towards the first end. A driven nut is slidably disposed within the guide groove. The driven nut has a threaded hole. The braking unit also has a drive screw rotatably passing through the shaft hole. The drive screw has a screw portion extending into the guide groove and screwed into the threaded hole. A driving unit is disposed on the adapter and connected to the drive screw for driving the drive screw.

2. The brake caliper as described in claim 1, wherein, The bottom of the guide groove is provided with a tapered groove that gradually narrows from the second end toward the first end, and the end of the driven nut is provided with a tapered protrusion corresponding to the tapered groove.

3. The brake caliper as described in claim 1, wherein, The bottom of the guide groove is provided with a clearance groove extending from the second end toward the first end, and the screw part is partially inserted into the clearance groove.

4. The brake caliper as described in claim 1, wherein, The inner wall of the guide groove is provided with at least one first rotation limiting part, and the outer periphery of the driven nut is provided with at least one second rotation limiting part corresponding to the first rotation limiting part. The first rotation limiting part and the second rotation limiting part cooperate with each other to restrict the driven nut from rotating relative to the second piston.

5. The brake caliper as described in claim 4, wherein, The first and second limiting parts are flat surfaces that abut against each other.

6. The brake caliper as described in claim 1, wherein, A first seal is provided between the piston chamber and the first piston.

7. The brake caliper as described in claim 1, wherein, The piston bore has a first opening corresponding to the accommodating space and a second opening corresponding to the sliding hole. A second seal is provided between the first opening and the second piston, and a third seal is provided between the second opening and the second piston.

8. The brake caliper as described in claim 7, wherein, The sliding seat has an annular groove corresponding to the third seal, and the third seal extends with an elastic end that continuously abuts against the annular groove.

9. The brake caliper as described in claim 1, wherein, The drive screw system has a flange portion, and a bearing is provided between the flange portion and the adapter seat.

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