Self-energizing brake caliper

1. A self-energizing brake caliper comprising:

a caliper bracket fixed to a vehicle frame and comprising a rotation axis extending in the height direction of the vehicle;

a first caliper arm rotatably connected to the rotation axis;

a second caliper arm rotatably connected to the rotation axis and crossing the first caliper arm;

an inboard brake pad; and

an outboard brake pad;

wherein the first caliper arm is slidably connected at a first end of the inboard brake pad in the inboard side of the brake disc and the outer end of the first caliper arm is connected to a second end of the outboard brake pad;

wherein the second caliper arm is connected to the second end of the inboard brake pad in the inboard side of the brake disc and the outer end of the second caliper arm is slidably connected to the first end of the outboard brake pad; and

wherein the driving force of an actuator is transferred to the inner ends of the first caliper arm and the second caliper arm.

2. The self-energizing brake caliper according to claim 1 , wherein the first caliper arm is provided in the upper side of the second caliper arm.

3. The self-energizing brake caliper according to claim 1 , further comprising a first guide member and a second guide member,

wherein the first caliper arm comprises a first mounting hole; the second caliper arm comprises a second mounting hole; the first end of the inboard brake pad comprises a first slot; and the first end of the outboard brake pad comprises a second slot;

wherein the first guide member passes through the first mounting hole and the first slot; the second guide member passes through the second mounting hole and the second slot; and

wherein the first guide member and the second guide member slide along the first slot and the second slot, respectively.

4. The self-energizing brake caliper according to claim 2 , further comprising a first guide member and a second guide member,

wherein the first caliper arm comprises a first mounting hole; the second caliper arm comprises a second mounting hole; the first end of the inboard brake pad comprises a first slot; and the first end of the outboard brake pad comprises a second slot;

wherein the first guide member passes through the first mounting hole and the first slot; the second guide member passes through the second mounting hole and the second slot; and

wherein the first guide member and the second guide member slide along the first slot and the second slot, respectively.

5. The self-energizing brake caliper according to claim 3 , wherein the first slot is provided at both of the upper side and the lower side of the inboard brake pad; and the second slot is provided at both of the upper side and the lower side of the outboard brake pad.

6. The self-energizing brake caliper according to claim 4 , wherein the first slot is provided at both of the upper side and the lower side of the inboard brake pad; and the second slot is provided at both of the upper side and the lower side of the outboard brake pad.

7. The self-energizing brake caliper according to claim 1 , wherein the inner end of the first caliper arm and the inner end of the second caliper arm move away from each other by the driving force in braking operation.

8. The self-energizing brake caliper according to claim 2 , wherein the inner end of the first caliper arm and the inner end of the second caliper arm move away from each other by the driving force in braking operation.

9. The self-energizing brake caliper according to claim 1 , wherein the caliper bracket comprises a mounting surface and a through-hole formed closely to the mounting surface; the first caliper arm is connected to the caliper bracket in the upper side of the mounting surface; and the second caliper arm passes through the through-hole in the lower side of the mounting surface to be connected to the caliper bracket.

10. The self-energizing brake caliper according to claim 2 , wherein the caliper bracket comprises a mounting surface and a through-hole formed closely to the mounting surface; the first caliper arm is connected to the caliper bracket in the upper side of the mounting surface; and the second caliper arm passes through the through-hole in the lower side of the mounting surface to be connected to the caliper bracket.

11. The self-energizing brake caliper according to claim 1 , wherein a first distance between the rotation axis and the point where the driving force acts is longer than a second distance between the rotation axis and the outer end of the first caliper arm; the first distance is the distance along the rotation axis of the brake disc; and the second distance is the distance along the longitudinal direction of the brake pads.

12. The self-energizing brake caliper according to claim 2 , wherein a first distance between the rotation axis and the point where the driving force acts is longer than a second distance between the rotation axis and the outer end of the first caliper arm; the first distance is the distance along the rotation axis of the brake disc; and the second distance is the distance along the longitudinal direction of the brake pads.