Low-deformation high-strength brake caliper piston

Abstract

The utility model relates to the technical field of brake caliper pistons, in particular to a low-deformation high-strength brake caliper piston which comprises a piston body, a heat absorption cavity is formed in the piston body, silicone oil is filled in the heat absorption cavity, and a corrugated supporting ring is fixedly installed on the inner side wall of the piston body. Fin supporting columns are fixedly installed in the piston body, a top cover is installed at the top end of the piston body in a threaded mode, a titanium alloy heat insulation sleeve is fixedly installed on the outer side wall of the piston body, the axial pressure bearing capacity of the piston body is improved through a corrugated supporting ring and the fin supporting columns, and meanwhile the contact area with silicone oil is increased; the silicone oil can prevent the temperature of the piston body from changing too fast in a short time, the effects of low deformation and high strength of the piston body are achieved, the safety of a brake system can be greatly improved, the annular groove formed in the top cover can make the pressure applied by hydraulic oil more uniform, and the effect of improving the stability of the hydraulic system is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake caliper pistons, in particular to a low-deformation and high-strength brake caliper piston. Background Art

[0002] The brake caliper piston is one of the key components in the automobile braking system. It is usually a cylindrical component installed in the cylinder of the brake caliper. Its main function is to move outward under the pressure transmitted by the brake fluid during the braking process, pushing the brake pads to contact the brake disc, generating friction, and thus achieving vehicle braking.

[0003] Existing Chinese patent: A front brake caliper piston for an automobile, patent number: CN206571868U, includes a piston body, a piston cavity, and a U-shaped annular groove. The annular groove is adjacent to one end of the piston cavity. The piston body forms a contact surface at the other end of the piston cavity. The contact surface is concave and has three frustums disposed on the contact surface. The three frustums form an isosceles triangle, the midpoint of the isosceles triangle coincides with the center of the contact surface, and the height of the frustum is greater than the height of the edge of the contact surface. The purpose of this utility model is to solve the problem of air being difficult to remove from the contact space between the piston and the brake caliper during braking, resulting in the air in the contact space between the piston and the brake caliper being squeezed during braking, resulting in poor braking effect.

[0004] However, during the implementation of the above technical solution, it was found that there were at least the following technical problems: when the above-mentioned caliper piston is in use, the heat generated by the friction between the caliper and the brake disc will be transferred to the piston, and the volume of the piston will expand and contract due to thermal expansion and contraction when the piston temperature changes. In addition, the above-mentioned caliper piston has a hollow structure with low strength. When the pressure applied by the hydraulic oil is too large, coupled with a rapid increase in temperature, it is more likely to cause the piston to deform, resulting in damage to the brake system. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the deficiencies in the prior art, the utility model provides a low-deformation, high-strength brake caliper piston to solve the technical problem that the heat generated by the friction between the caliper and the brake disc during use will be transferred to the piston, and the volume of the piston will expand and contract due to thermal expansion and contraction when the piston temperature changes. In addition, the above-mentioned caliper piston has a hollow structure with low strength. When the pressure applied by the hydraulic oil is too large and the temperature rises rapidly, the piston is more likely to deform, causing damage to the brake system.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A low-deformation, high-strength brake caliper piston comprises a piston body, a heat absorption chamber is provided inside the piston body, the interior of the heat absorption chamber is filled with silicone oil, a corrugated support ring is fixedly installed on the inner side wall of the piston body, a fin support column is fixedly installed on the inner side of the piston body, a top cover is threadedly installed on the top end of the piston body, a titanium alloy heat insulation sleeve is fixedly installed on the outer side wall of the piston body, a first sealing gasket is fixedly installed on the top end of the piston body, a second sealing gasket is fixedly installed on the bottom end of the top cover, and an annular groove is provided on the top end of the top cover.

[0010] Preferably, the piston body and the top cover are fixed by bolts.

[0011] Preferably, a sealing ring is installed on the outer side wall of the piston body.

[0012] (3) Beneficial effects

[0013] 1. The axial bearing capacity of the piston body is increased by the corrugated support ring and the fin support column, and the contact area with the silicone oil is increased at the same time, so that the silicone oil can prevent the temperature of the piston body from changing too quickly in a short period of time, achieving the effect of low deformation and high strength of the piston body, which can greatly improve the safety of the brake system.

[0014] Second, the top cover and the piston body are strengthened and fixed by multiple bolts, which can increase the stability of the top cover connection. The annular groove opened on the top cover can make the pressure applied by the hydraulic oil more uniform, thereby achieving the effect of improving the stability of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the top cover of the utility model;

[0017] Figure 2 It is a cross-sectional structural diagram of the utility model;

[0018] Figure 3 For this utility model Figure 2 A magnified structural diagram;

[0019] Figure 4 This is the exploded structure diagram of the utility model;

[0020] Figure 5 This is a structural diagram of the piston body of the present utility model.

[0021] Legend: 1. Piston body; 2. Heat absorption chamber; 3. Silicone oil; 4. Corrugated support ring; 5. Fin support column; 6. Top cover; 7. Titanium alloy insulation sleeve; 8. First sealing gasket; 9. Second sealing gasket; 11. Annular groove; 12. Bolt; 13. Sealing ring. DETAILED DESCRIPTION

[0022] The embodiment of the present application effectively solves the technical problem of the above-mentioned caliper piston by providing a low-deformation and high-strength brake caliper piston. When in use, the heat generated by the friction between the caliper and the brake disc will be transferred to the piston. When the piston temperature changes, the volume will change due to thermal expansion and contraction. In addition, the above-mentioned caliper piston has a hollow structure with low strength. When the pressure applied by the hydraulic oil is too large, and the temperature rises rapidly, it is more likely to cause the piston to deform, causing damage to the brake system. The axial bearing capacity of the piston body is increased by using a corrugated support ring and a fin support column, and the contact area with the silicone oil is increased at the same time, so that the silicone oil can prevent the temperature of the piston body from changing too quickly in a short period of time, thereby achieving the effect of low deformation and high strength of the piston body, which can greatly improve the safety of the brake system. The top cover and the piston body are strengthened and fixed by multiple bolts, which can increase the stability of the top cover connection. The annular groove on the top cover can make the pressure applied by the hydraulic oil more uniform, thereby achieving the effect of improving the stability of the hydraulic system.

[0023] Example

[0024] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that the heat generated by the friction between the caliper and the brake disc during use will be transferred to the piston, and the volume of the piston will expand and contract due to thermal changes when the piston temperature changes. In addition, the hollow structure of the caliper piston has low strength. When the pressure applied by the hydraulic oil is too high and the temperature rises rapidly, the piston is more likely to deform, causing damage to the brake system. The overall concept is as follows:

[0025] In response to the problems existing in the prior art, the utility model provides a low-deformation and high-strength brake caliper piston, including a piston body 1, a heat absorption chamber 2 is opened inside the piston body 1, the interior of the heat absorption chamber 2 is filled with silicone oil 3, and a corrugated support ring 4 is fixedly installed on the inner wall of the piston body 1.

[0026] A fin support column 5 is fixedly installed inside the piston body 1, a top cover 6 is threadedly installed on the top of the piston body 1, a titanium alloy insulation sleeve 7 is fixedly installed on the outer wall of the piston body 1, and a first sealing gasket 8 is fixedly installed on the top of the piston body 1.

[0027] A second sealing gasket 9 is fixedly installed on the bottom end of the top cover 6. An annular groove 11 is opened on the top end of the top cover 6. The piston body 1 and the top cover 6 are fixed by bolts 12. A sealing ring 13 is installed on the outer wall of the piston body 1.

[0028] Working principle:

[0029] The first step is that when in use, the heat generated by the friction of the caliper will not only be taken away by the air, but some of the heat will be transferred to the piston body 1. The interior of the piston body 1 is filled with silicone oil 3. The silicone oil 3 has good thermal stability, chemical stability and insulation, relatively high specific heat capacity, and is not easy to volatilize. It can absorb the heat on the piston body 1 and avoid rapid temperature increase. The multiple corrugated support rings 4 on the inner wall of the piston body 1 are stacked on each other, which can disperse the load more evenly and reduce local stress concentration, thereby improving the overall bearing capacity. The wave shape of the corrugated support ring 4 performs better in the face of bending and torsional forces, and can reduce the mass of the piston body 1 while ensuring that the piston body 1 has a high The supporting strength of the fin support column 5 also plays a supporting role when in use. At the same time, the corrugated support ring 4 and the fin support column 5 can also greatly increase the contact area with the silicone oil 3, so that the silicone oil 3 can absorb heat faster. The titanium alloy insulation sleeve 7 on the outer wall of the piston body 1 has poor thermal conductivity, which can reduce the heat transfer of the piston body 1 to the hydraulic cylinder body, avoiding thermal expansion and contraction of the cylinder body. The axial bearing capacity of the piston body 1 is increased by the corrugated support ring 4 and the fin support column 5, and the contact area with the silicone oil 3 is increased at the same time, so that the silicone oil 3 can prevent the temperature of the piston body 1 from changing too quickly in a short time, thereby achieving the effect of low deformation and high strength of the piston body 1, which can greatly improve the safety of the brake system.

[0030] In the second step, when performing maintenance, all the bolts 12 can be unscrewed, and the top cover 6 can be removed by rotating it counterclockwise to replace the silicone oil 3 inside the piston body 1. When the silicone oil 3 is replaced, the top cover 6 is screwed back clockwise, and then all the bolts 12 are screwed back. Multiple bolts 12 can prevent the top cover 6 from falling off due to the vibration generated by the operation of the car. The multiple annular grooves 11 opened on the top cover 6 can increase the contact area with the hydraulic oil, promote the hydraulic oil to be evenly distributed on the contact surface, and make the pressure applied by the hydraulic oil more uniform. The top cover 6 and the piston body 1 are strengthened and fixed by multiple bolts 12, which can increase the stability of the connection of the top cover 6. The annular grooves 11 opened on the top cover 6 can make the pressure applied by the hydraulic oil more uniform, thereby achieving the effect of improving the stability of the hydraulic system.

[0031] Finally, it should be noted that the above embodiments are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A low-deformation, high-strength brake caliper piston, comprising a piston body (1), wherein a heat absorption chamber (2) is provided inside the piston body (1), characterized in that: The interior of the heat absorption chamber (2) is filled with silicone oil (3), the inner wall of the piston body (1) is fixedly mounted with a corrugated support ring (4), the interior of the piston body (1) is fixedly mounted with a fin support column (5), the top end of the piston body (1) is threadedly mounted with a top cover (6), and the outer wall of the piston body (1) is fixedly mounted with a titanium alloy heat insulation sleeve (7).

2. A low-deformation, high-strength brake caliper piston according to claim 1, characterized in that: A first sealing gasket (8) is fixedly mounted on the top end of the piston body (1).

3. The low-deformation, high-strength brake caliper piston according to claim 1, characterized in that: A second sealing gasket (9) is fixedly mounted on the bottom end of the top cover (6).

4. The low-deformation, high-strength brake caliper piston according to claim 1, characterized in that: An annular groove (11) is provided at the top end of the top cover (6).

5. The low-deformation, high-strength brake caliper piston according to claim 1, characterized in that: The piston body (1) and the top cover (6) are fixed via bolts (12).

6. The low-deformation, high-strength brake caliper piston according to claim 1, characterized in that: A sealing ring (13) is installed on the outer side wall of the piston body (1).

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