Piston structure of front brake caliper

Abstract

The utility model belongs to the technical field of caliper pistons, and particularly relates to a piston structure of a front brake caliper, which comprises a piston main body, a heat dissipation piece and a heat insulation sheet, the piston main body comprises a closed end and an open end along the axial direction, the open end forms a cavity, the heat dissipation piece is arranged at the open end, and the heat insulation sheet is arranged between the heat dissipation piece and the inner wall of the cavity. Heat conduction from the heat dissipation piece to the piston main body is reduced; the piston is arranged to be the piston body, the heat insulation sheet is arranged between the piston body and the piston body, heat is effectively prevented from being conducted to the piston body, the heat is prevented from being conducted to hydraulic oil, the service life and the braking effect are not affected, and safety is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of caliper pistons, in particular to a piston structure of a front brake caliper. Background Art

[0002] With the rapid development of the automobile industry, the safety performance of automobiles has become the focus of increasing attention of consumers. As an important part of the automobile braking system, the design and performance of the brake caliper and its piston directly affect the braking effect and safety.

[0003] Brake calipers mainly slow down and stop vehicles by clamping brake discs. They are usually composed of two caliper housings, pistons, and brake pads, and are divided into front brake calipers and rear brake calipers. As the name implies, front brake calipers are used for braking the front wheels of the vehicle, and rear brake calipers are used for braking the rear wheels of the vehicle. Because the front wheels are subjected to greater forces during braking, the front brake caliper pistons often require higher strength and wear resistance, and more heat is generated during braking. This part of the heat needs to be dissipated in time, and it is necessary to prevent the heat from being transferred to the piston and hydraulic oil to prevent the hydraulic oil from decreasing in viscosity and lubrication performance due to the increase in temperature, causing the hydraulic oil to deteriorate, affecting its service life and braking effect;

[0004] For example, Chinese patent application No. (CN202223015322.2) discloses a brake caliper piston structure, including a piston body, one end of the piston body is open to form a brake pad connecting end, the brake pad connecting end is provided with a plurality of concave surfaces spaced in a circular distribution, the side wall of the piston body near the brake pad connecting end is provided with an air flow channel, and a circulating flow channel is formed between the air flow channel and the concave surface to promote convection between the air in the piston body and the air outside the piston body. The application increases the heat dissipation effect by opening the air flow channel, but although it increases the heat dissipation effect, it does not block the heat from being conducted to the hydraulic oil, and the hydraulic oil will continue to flow with the generation and elimination of braking, it is easy to bring this part of the heat into the hydraulic pipeline, it is still easy to affect the service life of the hydraulic oil, and then affect the braking effect, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a piston structure of a front brake caliper in view of the above-mentioned technical problems, so as to achieve the effect of blocking the heat from being conducted to the hydraulic oil.

[0006] In view of this, the utility model provides a piston structure of a front brake caliper, comprising:

[0007] The piston body includes a closed end and an open end along the axial direction, and the open end forms a cavity;

[0008] a heat sink mounted on the open end;

[0009] The heat insulating sheet is installed between the heat sink and the inner wall of the cavity and is used to reduce the heat conduction from the heat sink to the piston body.

[0010] In the above technical solution, further:

[0011] An embedding groove is provided on the inner wall of the cavity, and the heat insulation sheet is installed in the embedding groove;

[0012] The embedding groove extends axially to the end surface of the piston body close to the opening, and the heat insulation sheet includes an extension portion extending to the end surface of the piston body close to the opening.

[0013] In the above technical solution, further, the heat sink includes:

[0014] The cylinder is installed in the cavity, and the heat insulation sheet is located between the surface of the cylinder and the inner wall of the cavity;

[0015] Wherein, a connecting structure is arranged between the cylinder and the piston body.

[0016] In the above technical solution, further:

[0017] A slot is provided on the inner wall of the cavity, and the connection structure includes a strip-shaped protrusion connected to the surface of the cylinder;

[0018] The strip-shaped protrusion passes through the heat insulation sheet and is fixedly connected to the slot.

[0019] In the above technical solution, further:

[0020] One end of the cylinder located in the cavity is formed with a first annular protrusion on one side of the axis.

[0021] In the above technical solution, further:

[0022] A second annular protrusion is formed on one end of the cylinder located outside the cavity and away from the axis.

[0023] Wherein, an annular groove is formed between the second annular protrusion and the piston body along the axial direction.

[0024] In the above technical solution, further:

[0025] The second annular protrusion is in a stepped shape and includes a primary step and a secondary step;

[0026] Wherein, the first step abuts against the extended portion of the heat insulation sheet.

[0027] In the above technical solution, further:

[0028] One end of the cylinder body located at the second annular protrusion is provided with a plurality of arc-shaped concave surfaces distributed at equal intervals around the circumference;

[0029] The cylinder is located at one end of the second annular protrusion and is provided with a circular hole between two adjacent arc-shaped concave surfaces.

[0030] The beneficial effects of the utility model are:

[0031] 1. By configuring the piston to be a piston body and a heat sink, and providing a heat shield between the two, the heat can be effectively blocked from being transferred to the piston body, thereby preventing the heat from being transferred to the hydraulic oil, affecting its service life and braking effect, and ensuring safety.

[0032] 2. By embedding the heat insulation sheet and forming an extension portion, the installation stability of the heat insulation sheet is effectively improved and the structural strength is ensured.

[0033] 3. The piston body and the heat sink cylinder are fixedly connected by using strip-shaped protrusions and slots, which ensures the connection strength on the one hand and the setting area of ​​the heat insulation sheet and the heat insulation effect on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the utility model;

[0035] Figure 2 It is a side view of the utility model;

[0036] Figure 3 This utility model Figure 2 Sectional view at AA in the middle;

[0037] Figure 4 It is an exploded view of the utility model;

[0038] The markings in the figure are as follows: 1. piston body; 2. closed end; 3. open end; 4. cavity; 5. heat sink; 50. cylinder; 51. strip protrusion; 52. first annular protrusion; 53. second annular protrusion; 530. primary step; 531. secondary step; 54. annular groove; 55. arc-shaped concave surface; 56. circular hole; 6. thermal insulation plate; 60. extension; 7. embedding groove; 8. slot. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0040] Embodiment 1:

[0041] This embodiment provides a piston structure of a front brake caliper, including:

[0042] The piston body 1 includes a closed end 2 and an open end 3 along the axial direction, and the open end 3 forms a cavity 4;

[0043] A heat sink 5 mounted on the open end 3;

[0044] The heat insulation sheet 6 is installed between the heat sink 5 and the inner wall of the cavity 4 and is used to reduce the heat transfer from the heat sink 5 to the piston body 1;

[0045] Among them, the heat insulation sheet 6 can be made of ceramic material, and its specific molding process is an existing mature technology, which will not be repeated here. The piston body 1 and the heat sink 5 can be made of the material of the traditional brake caliper piston, which is not limited in this application and is an existing mature technology, so it will not be repeated here.

[0046] It can be seen from this embodiment that by configuring the piston to consist of a piston body 1 and a heat sink 5 and arranging a heat insulating sheet 6 therebetween, heat conduction to the piston body 1 is effectively blocked, thereby preventing heat from being conducted to the hydraulic oil, affecting its service life and braking effect, and ensuring safety.

[0047] Embodiment 2:

[0048] This embodiment provides a piston structure of a front brake caliper, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0049] An embedding groove 7 is provided on the inner wall of the cavity 4, and a heat insulating sheet 6 is installed in the embedding groove 7;

[0050] The embedding groove 7 extends axially to the end surface of the piston body 1 close to the opening, and the heat insulation sheet 6 includes an extension portion 60 extending to the end surface of the piston body 1 close to the opening;

[0051] Meanwhile, the depth dimension of the embedding groove 7 and the thickness dimension of the heat insulation sheet 6 can be 2-3 mm.

[0052] It can be seen from this embodiment that the heat insulation sheet 6 is embedded in the design and the extension portion 60 is formed, so that the installation stability of the heat insulation sheet 6 is effectively improved and the structural strength is ensured.

[0053] Embodiment 3:

[0054] This embodiment provides a piston structure of a front brake caliper, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the heat sink 5 includes:

[0055] The cylinder 50 is installed in the cavity 4, and the heat insulation sheet 6 is located between the surface of the cylinder 50 and the inner wall of the cavity 4;

[0056] Wherein, a connection structure is provided between the cylinder 50 and the piston body 1 .

[0057] It can be seen from this embodiment that by arranging the heat insulation sheet 6 between the surface of the cylinder 50 and the inner wall of the cavity 4, the heat insulation area and efficiency are ensured, and the installation stability of the heat insulation sheet 6 can be further improved.

[0058] Embodiment 4:

[0059] This embodiment provides a piston structure of a front brake caliper, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0060] A slot 8 is provided on the inner wall of the cavity 4, and the connection structure includes a strip-shaped protrusion 51 connected to the surface of the cylinder 50;

[0061] The strip-shaped protrusion 51 penetrates the heat-insulating sheet 6 and is fixedly connected to the slot 8;

[0062] At the same time, there can be four slots 8, and they are opened at equal intervals along the inner wall circumference of the cavity 4, and then there are four thermal insulation sheets 6, and they are located between two adjacent slots 8. At the same time, an integrated structure can be adopted between the strip-shaped protrusion 51 and the cylinder 50, and an interference fit can be adopted between the strip-shaped protrusion 51 and the slot 8.

[0063] It can be seen from this embodiment that the piston body 1 and the heat sink 5 cylinder 50 are fixedly connected by using the strip protrusion 51 and the slot 8, which ensures the connection strength on the one hand and the setting area of ​​the heat insulation sheet 6 on the other hand to ensure the heat insulation effect;

[0064] By using a plurality of strip-shaped protrusions 51 and slots 8, the connection strength between the piston body 1 and the cylinder body 50 can be improved, thereby ensuring the overall structural strength of the piston.

[0065] Embodiment 5:

[0066] This embodiment provides a piston structure of a front brake caliper, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0067] A first annular protrusion 52 is formed on one end of the cylinder 50 located in the cavity 4 toward the axis.

[0068] The first annular protrusion 52 and the cylinder body 50 may be in an integrated structure.

[0069] It can be seen from this embodiment that the provision of the first annular protrusion 52 effectively improves the structural strength of the cylinder 50 at one end in the cavity 4 , thereby ensuring the connection strength between the cylinder 50 and the piston body 1 on the one hand and ensuring the installation stability of the thermal insulation sheet 6 on the other.

[0070] Embodiment 6:

[0071] This embodiment provides a piston structure of a front brake caliper, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0072] A second annular protrusion 53 is formed on one end of the cylinder 50 located outside the cavity 4 and away from the axis.

[0073] The second annular protrusion 53 forms an annular groove 54 with the piston body 1 along the axial direction;

[0074] At the same time, the second annular protrusion 53 and the cylinder body 50 may be in an integrated structure.

[0075] It can be seen from this embodiment that by setting the second annular protrusion 53, the cylinder 50 and the piston body 1 form an annular groove 54, which facilitates the installation of the piston sealing ring. There is no need to open an additional annular groove on the surface of the piston body 1 to ensure the structural strength of the piston body 1.

[0076] Embodiment 7:

[0077] This embodiment provides a piston structure of a front brake caliper, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0078] The second annular protrusion 53 is in a stepped shape and includes a primary step 530 and a secondary step 531;

[0079] The first step 530 abuts against the extension portion 60 of the heat insulation sheet 6;

[0080] At the same time, the diameter dimension at the primary step 530 is greater than the diameter dimension at the extension portion 60 of the heat insulation sheet 6 .

[0081] It can be seen from this embodiment that by setting the second annular protrusion 53 to be stepped, on the one hand, the structural strength of the cylinder 50 at the second annular protrusion 53 is improved, and on the other hand, the installation stability of the thermal insulation sheet 6 is improved.

[0082] Embodiment 8:

[0083] This embodiment provides a piston structure of a front brake caliper, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0084] The cylinder 50 is provided with a plurality of arc-shaped concave surfaces 55 which are evenly spaced around the circumference at one end of the second annular protrusion 53;

[0085] The cylinder 50 is located at one end of the second annular protrusion 53 and is provided with a circular hole 56 between two adjacent arc-shaped concave surfaces 55;

[0086] Meanwhile, there are eight arc-shaped concave surfaces 55 and eight circular holes 56 .

[0087] It can be seen from this embodiment that, by providing the arc-shaped concave surface 55 and the circular hole 56, an air flow channel is formed at this location (i.e., at one end close to the brake pad), thereby improving the heat dissipation and cooling effects of the piston body 1;

[0088] By providing the circular hole 56 between the two arc-shaped concave surfaces 55 , the influence of the circular hole 56 on the structural strength of the cylinder 50 can be reduced.

[0089] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A piston structure of a front brake caliper, characterized in that: include: A piston body (1) comprises a closed end (2) and an open end (3) along the axial direction, and the open end (3) forms a cavity (4); A heat sink (5) mounted on the open end (3); The heat insulating sheet (6) is installed between the heat sink (5) and the inner wall of the cavity (4) and is used to reduce the conduction of heat from the heat sink (5) to the piston body (1).

2. The piston structure of the front brake caliper according to claim 1, characterized in that: An embedding groove (7) is provided on the inner wall of the mold cavity (4), and the heat insulation sheet (6) is installed in the embedding groove (7); The embedding groove (7) extends axially to the end surface of the piston body (1) close to the opening, and the heat insulation plate (6) includes an extension portion (60) extending to the end surface of the piston body (1) close to the opening.

3. The piston structure of the front brake caliper according to claim 2, characterized in that: The heat sink (5) comprises: A cylinder (50) is installed in the cavity (4), and a heat insulation sheet (6) is located between the surface of the cylinder (50) and the inner wall of the cavity (4); Wherein, a connection structure is provided between the cylinder (50) and the piston body (1).

4. The piston structure of the front brake caliper according to claim 3, characterized in that: A slot (8) is provided on the inner wall of the cavity (4), and the connection structure includes a strip-shaped protrusion (51) connected to the surface of the cylinder (50); Wherein, the strip-shaped protrusion (51) penetrates the heat insulation sheet (6) and is fixedly connected to the slot (8).

5. The piston structure of the front brake caliper according to claim 3, characterized in that: A first annular protrusion (52) is formed on one end of the cylinder (50) located in the mold cavity (4) and facing the axis.

6. The piston structure of the front brake caliper according to claim 3, characterized in that: A second annular protrusion (53) is formed on one end of the cylinder (50) located outside the mold cavity (4) and away from the axis. Wherein, an annular groove (54) is formed between the second annular protrusion (53) and the piston body (1) along the axial direction.

7. The piston structure of the front brake caliper according to claim 6, characterized in that: The second annular protrusion (53) is in a stepped shape and includes a primary step (530) and a secondary step (531); Wherein, the first step (530) abuts against the extension portion (60) of the thermal insulation sheet (6).

8. The piston structure of the front brake caliper according to claim 6, characterized in that: The cylinder (50) is provided with a plurality of arc-shaped concave surfaces (55) which are distributed at equal intervals around the circumference at one end of the second annular protrusion (53); The cylinder (50) is located at one end of the second annular protrusion (53) and is provided with a circular hole (56) between two adjacent arc-shaped concave surfaces (55).

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