Piston assembly structure for drive-by-wire calipers
Through the lead screw piston assembly structure, the rotational movement of the motor is converted into the linear movement of the piston, solving the complexity and cost of the traditional brake system, and achieving efficient braking and accuracy improvement of the line-controlled calipers.
Patent Information
- Application Number
- CN202322480751.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-13
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-09-13
AI Technical Summary
Traditional braking systems require support from multiple components, such as brake fluid and pipelines, resulting in complex structures, high cost and long response time, making it difficult to meet the simplified needs of line-controlled calipers.
The screw piston assembly structure is adopted, including ball screw, gear and limiting components. Through the rolling connection between the ball screw and the nut and gear transmission, the rotating motion of the motor is converted into linear motion of the piston to realize braking force pushing.
The integrated design of wire-controlled calipers is realized, which simplifies processing and assembly, reduces costs, and improves braking efficiency and accuracy.
Smart Images
Figure CN222163338U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a brake piston structure for an electronic caliper, in particular to a piston assembly structure for a wire-controlled caliper. Background Art
[0002] In traditional braking systems, piston movement requires brake fluid as a pressure transmission medium and brake lines as a brake fluid carrier. The piston assembly structure used for wire-controlled calipers does not require brake fluid and brake lines, has a simple structure and a short response time. Utility Model Content
[0003] In view of the existing traditional braking system, providing braking force requires the support of many components, such as brake fluid, pipelines, etc. The utility model proposes a piston assembly structure for a wire-controlled caliper, which is used to realize the wire-controlled caliper, reduce the number of vehicle chassis components, and reduce costs; this structure has high assembly efficiency and improved performance.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0005] The screw piston assembly is installed in the cylinder hole of the caliper body, and the screw piston assembly is connected to one end of the motor. The screw piston assembly adopts a ball screw pair, and the screw piston assembly is in contact with one side of the friction plate.
[0006] The screw-piston assembly comprises a piston, a ball screw and a gear; the piston is installed in the cylinder hole of the caliper body, one end of the ball screw extends into the piston hole of the piston, a nut is mounted on the outside of the ball screw in rolling connection with balls and threaded grooves, the nut is installed in the piston hole of the piston and is limited to only rotate; the ball screw serves as a rotating part of the screw-piston assembly, the other end of the ball screw extends out of the piston hole of the piston and is mounted with a gear in a coaxial and synchronously rotating manner.
[0007] The screw piston assembly also includes a limiting component, which includes a corrugated washer and a retaining ring. The piston hole of the piston is provided with a retaining ring groove on the inner circumference away from the cylinder hole of the caliper body, and the corrugated washer and the retaining ring are installed in the retaining ring groove.
[0008] The gear is installed on the ball screw assembly and connected to the external gear set for receiving the transmission force.
[0009] The external driving force drives the ball screw of the screw-piston assembly, and the screw-piston assembly converts the rotation of the ball screw into the linear motion of the piston, pushing the piston.
[0010] The beneficial effects of the utility model are:
[0011] The utility model realizes the integration of the wire-controlled brake piston, has the advantages of simple processing, convenient assembly and reduced cost, and the piston assembly has high structural precision, thereby improving the braking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structural assembly of the utility model.
[0013] In the figure: a screw-piston assembly (1), a nut (1.1), a screw (1.2), a piston (2), a gear (3), and a limit member (4). DETAILED DESCRIPTION
[0014] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0015] like Figure 1 As shown, the specific implementation includes a caliper body, a motor 1 and a screw piston assembly 1; the screw piston assembly 1 is installed in the cylinder hole of the caliper body, and the rotating part of the screw piston assembly 1 can be synchronously connected with one end of the motor 1 through a reduction mechanism, the screw piston assembly 1 adopts a ball screw pair, and the screw piston assembly 1 is contact-connected with one side of a friction plate; the friction plate is used for friction connection to the brake disc of a disc brake.
[0016] The screw piston assembly 1 adopts a ball screw pair, including a piston 2, a ball screw 1.2 and a gear 3; the piston 2 is installed in the cylinder hole of the caliper body, one end of the ball screw 1.2 extends into the piston hole of the piston 2, and a nut 1.1 is mounted on the outside of the ball screw 1.2 in a rolling connection through balls and thread grooves. The nut 1.1 and the ball screw 1.2 are connected by rolling threads. The nut 1.1 is installed in the piston hole of the piston 2 and is limited to only rotate but not move axially; the ball screw 1.2 serves as a rotating part of the screw piston assembly 1, and the other end of the ball screw 1.2 extends out of the piston hole of the piston 2 and is fixedly mounted with a gear 3 in a coaxial and synchronously rotating manner.
[0017] The screw-piston assembly 1 also includes a limiting component 4, which includes a corrugated washer and a retaining ring. The piston hole of the piston 2 is provided with a retaining ring groove with an annular groove on the inner circumference away from the cylinder hole of the caliper body. The corrugated washer and the retaining ring are installed in the retaining ring groove. The corrugated washer is axially limited by the retaining ring and installed in the retaining ring groove, thereby limiting the nut of the ball screw 1.2 from axial movement in the piston hole of the piston 2.
[0018] Under the action of the limiting component 4, the nut 1.1 fits with the piston 2.
[0019] Gear 3 is mounted on ball screw assembly 1 and connected to an external gear set for receiving transmission force. After gear 3 receives the transmission force from the external gear set, screw 1.2 rotates, causing nut 1.1 to move axially, converting the rotation into linear motion and pushing piston 2.
[0020] The specific implementation process of this utility model:
[0021] The rotation of the external motor drives the ball screw 1.2 of the screw-piston assembly 1 to rotate through the reduction mechanism. The nut of the ball screw assembly converts the rotation into axial motion, pushing the piston in the screw-piston assembly, so that the rotational motion of the ball screw 1.2 inside the screw-piston assembly 1 is converted into axial motion of the piston, and the friction plate is pushed out by the piston to achieve braking.
[0022] The above specific implementation modes are used to explain the present invention rather than to limit the present invention. Any modification and change made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.
Claims
1. A piston assembly structure for a wire-controlled caliper, Features: The screw piston assembly (1) is installed in the cylinder hole of the caliper body, and the screw piston assembly (1) is connected to one end of the motor. The screw piston assembly (1) adopts a ball screw pair, and the screw piston assembly (1) is in contact with one side of the friction plate. The screw piston assembly (1) comprises a piston (2), a ball screw (1.2) and a gear (3); the piston (2) is installed in the cylinder hole of the caliper body, one end of the ball screw (1.2) extends into the piston hole of the piston (2), a nut (1.1) is mounted on the outside of the ball screw (1.2) in a rolling connection via balls and thread grooves, the nut (1.1) is installed in the piston hole of the piston (2) and is limited to only rotate; the ball screw (1.2) serves as a rotating part of the screw piston assembly (1), the other end of the ball screw (1.2) extends out of the piston hole of the piston (2) and is coaxially and synchronously rotated with the gear (3); The screw-piston assembly (1) further comprises a limiting component (4), the limiting component (4) comprising a corrugated washer and a retaining ring, the piston hole of the piston (2) is provided with a retaining ring groove on the inner circumference away from the cylinder hole of the caliper body, the corrugated washer and the retaining ring are installed in the retaining ring groove, the corrugated washer is axially limited by the retaining ring and installed in the retaining ring groove, thereby limiting the nut of the ball screw (1.2) to be axially immovable in the piston hole of the piston (2); The gear (3) is mounted on the ball screw assembly and connected to an external gear set for receiving transmission force.