Novel caliper piston
By designing a spiral structure lubrication groove and ball bearings to work synergistically, stable lubrication performance is ensured, solving the lubrication problem of traditional caliper pistons, ensuring stable lubrication performance, stable sealing performance, and reducing maintenance costs.
Patent Information
- Application Number
- CN202520606770.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Traditional caliper pistons rely on externally applied grease for lubrication, which can easily be squeezed out of the friction surface, leading to lubrication failure. Furthermore, dust and moisture can penetrate through the gap between the piston and cylinder, contaminating the lubrication interface and exacerbating wear.
A novel caliper piston has been designed with a spiral lubrication groove and lubrication hole inside, which works in conjunction with ball bearings. The ball bearings are guided by the lubrication groove and extension structure to ensure that the lubricating grease evenly covers the friction surface, and leakage is prevented by a sealing component, including the design of a sealing cap, retaining ring and elastic cover.
It achieves uniform coverage of lubricating grease, reduces mechanical wear, extends service life, lowers maintenance costs, improves sealing performance, prevents grease leakage and contamination, ensures stable lubrication performance, improves sealing performance, ensures stable lubrication performance, improves sealing performance, ensures stable lubrication performance, ensures stable sealing performance, avoids leakage risk, and lowers maintenance costs.
Smart Images
Figure CN223708372U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of calliper, and relates to a calliper piston, in particular to a novel calliper piston. BACKGROUND
[0002] At present, the brake of automobile is basically controlled by hydraulic pressure, and the brake is realized by driving the brake pad on the brake calliper to tightly hold the brake disc. The brake calliper is one of the core components of the brake system, and the brake calliper comprises a calliper piston and a brake pad. Under the action of hydraulic pressure, the piston drives the brake pad to approach the brake disc.
[0003] The lubrication of the conventional calliper piston depends on external greasing, and the lubricating grease is easily squeezed out of the friction surface when the piston reciprocates, resulting in lubrication failure. The dust and water enter through the gap between the piston and the cylinder body, pollute the lubricating interface and aggravate the abrasion. SUMMARY
[0004] The utility model discloses a novel calliper piston to solve the above-mentioned problems in the prior art.
[0005] The utility model discloses a novel calliper piston, which comprises a piston main body and a calliper with a brake chamber.
[0006] The piston main body is movably installed in the brake chamber and can reciprocate.
[0007] The piston main body is movably installed in the brake chamber and can reciprocate.
[0008] The novel calliper piston further comprises a sealing assembly for sealing, which comprises a sealing cover matched with the brake chamber, a retaining ring on the end of the piston rod and an elastic cover that can elastically stretch and contract.
[0009] In the novel calliper piston, the ball is connected to the inside of the lubricating hole through the floating of the lubricating grease.
[0010] In the new caliper piston, the elastic cover is embedded below the blocking ring and is fixed on the sealing cover by the end part through the plurality of pressing parts.
[0011] In the new caliper piston, the blocking ring and the end part of the piston rod are integrally formed.
[0012] Compared with the prior art, the new caliper piston has the following advantages:
[0013] 1. The synergistic effect of the spiral lubricating groove and the ball ensures uniform coverage of the friction surface by the oil, reduces mechanical wear, prolongs the service life, and the design of the oil cavity and the lubricating hole facilitates the injection and replenishment of lubricating oil, thereby reducing the maintenance cost.
[0014] 2. The elastic cover and the pressing part are designed to adapt to the reciprocating motion of the piston rod, the sealing performance is stable, the risk of leakage is avoided, the design of the oil cavity and the lubricating hole facilitates the injection and replenishment of lubricating oil, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a schematic view of the assembled three-dimensional structure of the new caliper piston.
[0016] Figure 2 is a schematic view of the assembled three-dimensional structure of the new caliper piston.
[0017] Figure 3 is a schematic view of the three-dimensional structure of the new caliper piston.
[0018] Figure 4 is a schematic view of the three-dimensional structure of the piston rod of the new caliper piston.
[0019] Figure 5 is a schematic view of the partial cross-sectional structure of the new caliper piston.
[0020] Figure 6 is a schematic view of the assembled three-dimensional structure of the new caliper piston.
[0021] In the figure, 1 is the piston body, 2 is the caliper, 3 is the piston cavity, 4 is the piston rod, 5 is the oil cavity, 6 is the lubricating groove, 7 is the lubricating hole, 8 is the ball, 9 is the circular arc groove, 10 is the sealing cover, 11 is the blocking ring, 12 is the elastic cover, and 13 is the pressing part. DETAILED DESCRIPTION
[0022] The following is a specific embodiment of the present application and further describes the technical solution of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.
[0023] AsFigure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown in the figure, the new caliper 2 piston comprises a piston body 1 and a caliper 2 with a brake cavity, the piston body 1 is movably installed in the brake cavity and can reciprocate, the piston body 1 is provided with a piston cavity 3, a piston rod 4 is located inside the piston cavity 3, the piston rod 4 is movably connected to the inside of the piston cavity 3 through a bearing, an oil cavity 5 for injecting lubricating oil into the inside of the piston body 1 is formed in the side wall of the piston body 1, a lubricating groove 6 is formed on the outside of the piston body 1, an extension part for guiding and cooperating with the lubricating groove 6 and used for guiding is arranged radially outward in the brake cavity of the caliper 2, wherein the lubricating groove 6 and the extension part are both arranged in a spiral structure and cooperatively guide each other, a lubricating hole 7 for lubrication is formed in the lubricating groove 6, the lubricating hole 7 has a movable ball 8 inside, the lubricating hole 7 is in communication with the oil cavity 5, and the inside wall of the oil cavity 5 has a circular arc groove 9 for floating limiting of the ball 8, the new caliper 2 piston further comprises a sealing assembly for sealing, the sealing assembly comprises a sealing cover 10 cooperatively matched with the brake cavity, a stop ring 11 located on the end of the piston rod 4, and an elastic cover 12 which can elastically stretch and contract, a plurality of pressing parts 13 are further arranged on the sealing cover 10 for pressing and fixing the elastic cover 12.
[0024] The ball 8 is connected to the inside of the lubricating hole 7 through the floating of the lubricating oil, wherein the ball 8 cooperates with the extension part structure through the lubricating groove 6 to extrude the inside of the oil cavity 5, so that the lubricating oil seeps out through the pores between the ball 8 and the lubricating hole 7.
[0025] The elastic cover 12 is embeddedly installed below the stop ring 11, the end thereof is pressed and fixed on the sealing cover 10 through the plurality of pressing parts 13, the elastic cover 12 can be driven by the piston rod 4 to elastically stretch and contract, the stop ring 11 is integrally formed with the end of the piston rod 4, the spiral lubricating groove 6 cooperates with the ball 8 to ensure that the lubricating oil uniformly covers the friction surface, reduces mechanical wear, and prolongs the service life, the design of the oil cavity 5 and the lubricating hole 7 facilitates the injection and replenishment of the lubricating oil, and reduces the maintenance cost.
[0026] The piston rod 4 reciprocates along the piston cavity 3 under the support of the bearing to drive the caliper 2 to complete the braking action, the spiral structure of the spiral lubricating groove 6 cooperates with the extension part to guide the movement direction of the piston, and uniformly distributes the lubricating oil through the rotating extrusion effect. The ball 8 floats in the lubricating hole 7 and is affected by the movement pressure of the piston to extrude the oil in the oil cavity 5, so that the oil seeps out through the pores to form a continuous lubricating film to reduce friction. The elastic cover 12 stretches and contracts with the piston rod 4 to form a dynamic seal with the sealing cover 10 and the stop ring 11 to prevent oil leakage and external contaminants from entering.
[0027] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.
[0028] Although the terms are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any additional limitation is contrary to the spirit of the present application.
Claims
1. A new type of caliper piston comprising a piston body (1) and a caliper (2) with a brake chamber, the piston body (1) being movably mounted in the brake chamber and being movable to and fro, characterized in that The piston body (1) is provided with a piston cavity (3) inside, and a piston rod (4) is arranged inside the piston cavity (3) and movably connected to the piston cavity (3) through a bearing; An oil cavity (5) for injecting lubricating oil into the piston body (1) is arranged in the side wall of the piston body (1), and a lubricating groove (6) is arranged on the outside of the piston body (1); an extension part for guiding and matched with the lubricating groove (6) is arranged radially outward in the brake cavity of the caliper (2); The lubricating groove (6) and the extension part are both arranged in a spiral structure and matched with each other, and a lubricating hole (7) for lubrication is arranged in the lubricating groove (6); the lubricating hole (7) is movably provided with a ball (8) inside, the lubricating hole (7) is communicated with the oil cavity (5), and the inner side wall of the oil cavity (5) is provided with a circular arc groove (9) for floating limiting of the ball (8); The novel caliper piston further comprises a sealing assembly for sealing, which comprises a sealing cover (10) matched with the brake cavity, a retaining ring (11) arranged on the end of the piston rod (4), and an elastic cover (12) which can be elastically stretched and contracted; the sealing cover (10) is further provided with a plurality of pressing parts (13) for pressing and fixing the elastic cover (12).
2. A new type of caliper piston according to claim 1, characterized in that, The ball (8) is movably connected to the inside of the lubricating hole (7) through the lubricating oil, wherein the ball (8) is matched with the extension part structure through the lubricating groove (6) to extrude the inside of the oil cavity (5), so that the lubricating oil seeps out through the pores between the ball (8) and the lubricating hole (7).
3. A new type of caliper piston according to claim 1, characterized in that, The elastic cover (12) is embeddedly installed below the retaining ring (11), and the end thereof is pressed and fixed on the sealing cover (10) through the plurality of pressing parts (13); the elastic cover (12) can be elastically stretched and contracted by the piston rod (4).
4. A new type of caliper piston according to claim 1, characterized in that, The retaining ring (11) and the end of the piston rod (4) are arranged in an integral molding structure.