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US-12624735-B2 - Caliper brake

US12624735B2US 12624735 B2US12624735 B2US 12624735B2US-12624735-B2

Abstract

A caliper brake includes a carrier in which a pair of pad plates are installed to move forward to and backward from a disc, a caliper housing slidably installed on the carrier and provided with a cylinder, a piston installed in the cylinder and provided to move forward to and backward from the pad plate by brake hydraulic pressure, and a friction reducing part provided between an inner circumferential surface of the caliper housing and an outer circumferential surface of the piston, wherein the friction reducing part includes a ball interposed between the inner circumferential surface of the housing and the outer circumferential surface of the piston and a cage configured to accommodate the ball.

Inventors

  • Sudhir Kumar

Assignees

  • HL MANDO CORPORATION

Dates

Publication Date
20260512
Application Date
20230613
Priority Date
20220613

Claims (14)

  1. 1 . A caliper brake comprising: a caliper housing slidably installed on a carrier, in which a pair of pad plates are installed, and provided with a cylinder; a piston configured to move forward to and backward from the pad plate on the cylinder; and a friction reducing part provided between an inner circumferential surface of the caliper housing and an outer circumferential surface of the piston, wherein the friction reducing part includes: a ball interposed between the inner circumferential surface of the caliper housing and the outer circumferential surface of the piston; and a cage configured to support the ball.
  2. 2 . The caliper brake of claim 1 , further comprising a support member provided between the cylinder and the piston and configured to support the friction reducing part.
  3. 3 . The caliper brake of claim 2 , wherein a front end portion of the cage faces the support member and a rear end portion thereof faces an inner rear surface of the cylinder.
  4. 4 . The caliper brake of claim 2 , wherein the piston includes a stepped portion protruding from the outer circumferential surface thereof in a radial direction and provided to be in contact with the support member.
  5. 5 . The caliper brake of claim 4 , wherein a front surface of the support member faces the stepped portion and a rear surface thereof faces one side end of the cage.
  6. 6 . The caliper brake of claim 2 , wherein the support member is provided in a ring shape, an outer circumferential surface thereof is bound to the cylinder, and an inner circumferential surface thereof is in close contact with the outer circumferential surface of the piston.
  7. 7 . The caliper brake of claim 2 , wherein the support member is provided as an elastic body which is elastically deformed by a displacement of the piston.
  8. 8 . The caliper brake of claim 2 , wherein the caliper housing includes an accommodation groove formed to be recessed in the inner circumferential surface of the cylinder in a radial direction and into which at least a part of the support member is inserted.
  9. 9 . The caliper brake of claim 1 , wherein the cage includes an opening formed to pass therethrough in a radial direction and configured to rotatably support the ball.
  10. 10 . The caliper brake of claim 9 , wherein the ball and the opening are provided as a plurality of balls and a plurality of openings, respectively.
  11. 11 . The caliper brake of claim 10 , wherein the plurality of balls and the plurality of openings are arranged in a circumferential direction of the cage, and a plurality of rows are arranged in an axial direction of the cage.
  12. 12 . The caliper brake of claim 11 , wherein the balls and the openings arranged in any one row are arranged in the same phase with respect to balls and openings arranged in adjacent rows.
  13. 13 . The caliper brake of claim 11 , wherein the balls and the openings in the plurality of rows are arranged in a different phase with respect to the balls and the openings arranged in adjacent rows.
  14. 14 . The caliper brake of claim 11 , wherein the plurality of rows of balls and openings include a first row arranged in a first phase and a second row arranged in a second phase which is different from the first phase, wherein the first row and the second row are alternately arranged in the axial direction of the cage.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the benefit of Korean Patent Application No. 2022-0071745, filed on Jun. 13, 2022 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. BACKGROUND 1. Field Embodiments of the present disclosure relate to a caliper brake device of a vehicle, and more particularly, to a caliper brake device of a vehicle in which the durability of components arranged in the caliper brake is increased. 2. Description of the Related Art In general, a vehicle necessarily includes a braking system for braking and various types of braking systems are proposed for the safety of passengers and cargo. Specifically, a caliper brake among braking systems is a braking system in which brake pads come into contact with and press both sides of a brake disc, which rotates with wheels, to obtain a braking force by friction between the brake disc and the brake pads. Since such a caliper brake performs braking by friction, the wear of components located in the caliper brake inevitably occurs. The wear of components increases the maintenance costs of a vehicle because the components have to be replaced periodically, and also poses a risk to the safety of passengers and cargo. Specifically, in the conventional caliper brake system, a method of fastening a piston to a caliper housing is a fastening method in which a piston is forcibly press-fitted into a cylinder in a caliper housing through a hydraulic pressure generation device. This fastening method causes direct friction between the caliper housing and the piston upon braking and also causes overall friction between the cylinder and the piston in the caliper housing. Accordingly, a problem was generated in that lifetime of components in the caliper brake is greatly shortened and the speed of a piston is reduced. Therefore, in a caliper brake, a technology for minimizing the friction between a caliper brake and a piston upon braking is required. RELATED ART Patent Document Korean Laid-open Patent No. 10-2021-0128691 (Published on Oct. 27, 2021) SUMMARY Therefore, it is an aspect of the present disclosure to provide a caliper braking device in which the overall friction between a caliper housing and a piston is prevented during braking of a caliper brake of a vehicle. It is another aspect of the present disclosure to provide an elastic restoring force which assists a piston to move backward during braking of a caliper brake of a vehicle. It is still another aspect of the present disclosure to provide a caliper brake device which increases the speed of a piston during braking of a caliper brake of a vehicle. Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure. In accordance with one aspect of the present disclosure, a caliper brake device includes a carrier in which a pair of pad plates are installed to move forward to and backward from a disc; a caliper housing slidably installed on the carrier in which a pair of pad plates are installed and provided with a cylinder; a piston configured to move forward to and backward from the pad plate on the cylinder; and a friction reducing part provided between an inner circumferential surface of the caliper housing and an outer circumferential surface of the piston, wherein the friction reducing part includes a ball interposed between the inner circumferential surface of the caliper housing and the outer circumferential surface of the piston and a cage configured to support the ball. The caliper brake may further include a support member provided between the inner circumferential surface of the caliper housing and the outer circumferential surface of the piston to prevent the friction reducing part from separating from the inside of the caliper housing. The piston may further include a stepped portion provided to face the support member so that the piston comes into contact with the support member and then is spaced apart from the support member. The cage may include an opening formed to pass therethrough in a radial direction to accommodate the ball. The support member may be formed as an elastic body to provide a restoring force to the piston. The caliper housing may be provided with an accommodation groove formed to be recessed in the inner circumferential surface thereof in the radial direction and coupled to at least a part of the support member. The support member may be formed in a ring shape along the inner circumferential surface of the caliper housing. The opening may be provided as a plurality of openings to accommodate a plurality of balls. The plurality of balls and the plurality of openings may be arranged in a circumference direction of the cage, and a plurality of rows may be arranged in an axial direction of the cage. The balls and the openings arranged in any one row may be arranged in