CN214742926U - Wear-resisting type braking pincers piston that radiating effect is good - Google Patents

Abstract

The utility model discloses a piston, aiming at providing a wear-resistant brake caliper piston with good heat dissipation effect, the key point of the technical proposal is the wear-resistant brake caliper piston with good heat dissipation effect, which comprises a piston body and an inner cavity, one end of the piston body is a closed end, the other end is an open end, the surface of the closed end is provided with a bulge, the bulge is provided with a circular groove, the inner wall of the inner cavity is provided with an exhaust hole, the outer side of the exhaust hole is provided with an exhaust groove, the inner cavity comprises a flat part, a narrow part and a wide part, the flat part is provided with a wear-resistant structure, the narrow part is provided with a heat dissipation groove, the diameter of the inner wall of the wide part is sequentially increased from inside to outside, the surface of the piston body is provided with a sealing groove, the wear-resistant structure comprises a first ring groove and a second ring groove, the inner wall between the first ring groove and the second ring groove is a reducing part, the ring groove is provided with a limiting groove on the inner wall of the inner cavity, the inner cavity is internally provided with a buffer structure, be equipped with thermal-insulated chamber in the piston body to it has thermal insulation material to fill, the utility model is suitable for a piston technical field.

Description

Wear-resisting type braking pincers piston that radiating effect is good

Technical Field

The utility model belongs to the technical field of the piston, refer in particular to a wear-resisting type braking pincers piston that the radiating effect is good.

Background

The existing hydraulic brake caliper generally comprises a caliper body, a brake pad and a piston, wherein the piston pushes the brake pad to abut against a brake disc to realize braking. For better braking effect, the brake pads are respectively pushed by two symmetrically arranged pistons in the brake caliper on the vehicle, the pistons and the brake caliper slide, the surfaces of the pistons are easy to wear after long-time use, a large amount of heat is generated in the motion of the pistons, and the structural performance is also influenced if the pistons cannot be timely discharged.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art existence, the utility model aims to provide a wear-resisting type braking pincers piston that heat-resisting effectual.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a wear-resisting type braking pincers piston that radiating effect is good, includes piston body and inner chamber, piston body one end is the blind end, and the other end is the open end, the fixed surface that the piston body is located the blind end is equipped with the bellying, the bellying upper surface is equipped with circular recess, one side that the inner chamber is close to the blind end radially is equipped with a plurality of exhaust holes, one side that the axle center was kept away from in the exhaust hole is equipped with the air discharge duct, the inner chamber from interior to exterior includes flat portion, narrow portion and wide portion, be equipped with wear-resisting structure on the flat portion, equidistant circumference distributes on the inner wall of narrow portion is equipped with a plurality of radiating grooves, the diameter from interior to exterior of wide portion inner wall increases in proper order, one side that the piston body is close to the air discharge duct is equipped with the seal groove.

The utility model discloses further set up to: wear-resisting structure includes first ring channel and second ring channel, the inner wall between first ring channel and the second ring channel is reducing portion, the diameter of reducing portion is greater than the diameter at other positions of flat portion inner wall, all be fixed in first ring channel and the second ring channel and be equipped with wear-resisting lubricant film.

The utility model discloses further set up to: and a plurality of annular grooves are distributed on the inner wall of the inner cavity and positioned on the reducing part at equal intervals.

The utility model discloses further set up to: the inner wall of inner chamber is gone up the circumference and is distributed and be equipped with a plurality of spacing grooves, the inner chamber is close to the fixed buffer structure that is equipped with in closed slot one side, buffer structure includes elastic ring and a plurality of elastic block, and is a plurality of elastic block one end is close to the inner wall fixed connection of closed slot one side with the inner chamber, the other end and elastic ring fixed connection.

The utility model discloses further set up to: a heat insulation cavity is arranged in the piston body, and heat insulation materials are filled in the heat insulation cavity.

The utility model has the advantages that:

1. the convex part is arranged at the closed end of the piston, and the circular groove is arranged on the convex part, so that a gap can be reserved between the closed end and the brake caliper when the closed end is abutted against the brake caliper, and the situation that the closed end is attracted with the brake caliper to cause the failure of a brake system and cause potential safety hazards is avoided;

2. the wear-resistant structure is arranged on the flat part, so that the wear resistance of the inner wall of the inner cavity is improved, the plurality of radiating grooves are arranged on the inner wall of the narrow part, the gas flow in the inner cavity can be improved, the pore diameter of the inner wall of the wide part is changed, the gas circulation in the inner cavity can be facilitated, and the heat in the inner cavity can be dissipated;

3. the limiting groove is favorable for limiting the piston body, the piston body is prevented from rotating in the braking process, the braking effect is improved, the limiting groove also has a certain positioning effect and is convenient to mount and dismount, and meanwhile, the buffer structure is favorable for absorbing vibration generated in the braking process, the abrasion of the piston is avoided, and the service life is effectively prolonged;

4. through set up thermal-insulated chamber in the piston body to it has thermal-insulated material to fill in the thermal-insulated intracavity, can prevent effectively that outside heat from transmitting in the inner chamber, prevent to influence its structural performance.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a bottom view of the present invention;

fig. 3 is a schematic structural diagram of the buffering structure of the present invention;

in the drawings: 1. a piston body; 10. a closed end; 11. an open end; 2. an inner cavity; 20. a flat portion; 21. a narrow portion; 22. a wide portion; 3. a boss portion; 4. a circular groove; 5. an exhaust hole; 6. an exhaust groove; 7. a wear resistant structure; 70. a first annular groove; 71. a second annular groove; 72. a diameter reducing portion; 73. a wear-resistant lubricating layer; 8. a heat sink; 9. a sealing groove; 12. an annular groove; 13. a limiting groove; 14. a buffer structure; 140. an elastic ring; 141. an elastic block; 15. a thermally insulating cavity; 16. an insulating material.

Detailed Description

The invention is further described in the following with reference to fig. 1 to 3 in a specific embodiment:

a wear-resistant brake caliper piston with good heat dissipation effect comprises a piston body 1 and an inner cavity 2, wherein one end of the piston body 1 is a closed end 10, the other end of the piston body is an open end 11, a protruding part 3 is fixedly arranged on the surface of the piston body 1, which is positioned at the closed end 10, a circular groove 4 is arranged on the upper surface of the protruding part 3, a plurality of exhaust holes 5 are radially arranged on one side, which is close to the closed end 10, of the inner cavity 2, an exhaust groove 6 is arranged on one side, which is far away from an axis, of each exhaust hole 5, the inner cavity 2 comprises a flat part 20, a narrow part 21 and a wide part 22 from inside to outside, a wear-resistant structure 7 is arranged on the flat part 20, a plurality of heat dissipation grooves 8 are circumferentially distributed on the inner wall of the narrow part 21 at equal intervals, the diameter of the inner wall of the wide part 22 is sequentially increased from inside to outside, a sealing groove 9 is arranged on one side, which is close to the exhaust groove 6, and the protruding part 3 and the piston body 1 are preferably integrally formed, the number of the heat dissipation grooves 8 is preferably three.

According to the structure, the protruding part 3 is arranged at the closed end 10 of the piston, and the circular groove 4 is arranged on the protruding part 3, so that a gap can be reserved between the closed end 10 and the brake caliper when the closed end 10 is abutted against the brake caliper, and the situation that the closed end 10 is attracted to the brake caliper to cause failure of a brake system and potential safety hazards is avoided; the flat part 20 is provided with the wear-resistant structure 7 to improve the wear resistance of the inner wall of the inner cavity 2, the inner wall of the narrow part 21 is provided with the plurality of radiating grooves 8 to improve the gas flow in the inner cavity 2, the inner wall aperture of the wide part 22 is changed to facilitate the gas circulation in the inner cavity 2 and the heat dissipation in the inner cavity 2; meanwhile, the plurality of exhaust holes 5 are formed in the inner cavity 2, so that gas in the inner cavity 2 can be exhausted in time, and the exhaust space is enlarged due to the design of the exhaust groove 6, so that the exhaust can be accelerated.

As an alternative embodiment, the wear-resistant structure 7 includes a first annular groove 70 and a second annular groove 71, the inner wall between the first annular groove 70 and the second annular groove 71 is a reduced diameter portion 72, the diameter of the reduced diameter portion 72 is larger than the diameter of the other portions of the inner wall of the flat portion 20, wear-resistant lubricating layers 73 are fixedly disposed in the first annular groove 70 and the second annular groove 71, the wear-resistant lubricating layers 73 are bonded and connected in a limited manner, and are preferably made of polytetrafluoroethylene.

It can be seen from the above structure that, by making the diameter of the reduced diameter portion 72 larger than the diameters of other portions of the inner wall of the flat portion 20, on one hand, the contact area of the inner wall surface of the inner cavity 2 is reduced, thereby reducing frictional resistance and improving wear-resisting and lubricating effects, and on the other hand, the lubricating oil on the inner wall of the reduced diameter portion 72 can be prevented from leaking outwards, so that the lubricating oil grease forms an oil film on the inner wall of the reduced diameter portion 72, the lubricating effect is improved while the sealing effect is also improved, and the smoothness of braking is ensured; and adopt polytetrafluoroethylene material's wear-resisting lubricant coating 73, can further improve the lubricity and the wearability of the inner wall surface of inner chamber 2, effective increase of service life.

As an alternative embodiment, a plurality of annular grooves 12 are distributed on the inner wall of the inner cavity 2 and on the reduced diameter portion 72 at equal intervals.

By the structure, the annular grooves 12 which are distributed at a plurality of equal intervals can retain lubricating grease in the inner cavity 2, so that a fluid sealing film is formed at the position, the sealing effect is improved, the self-lubricating effect can be achieved, relative displacement is smooth, abrasion of the inner wall of the inner cavity 2 is reduced, and the service life of the piston is prolonged.

As an alternative embodiment, a plurality of limiting grooves 13 are distributed on the inner wall of the inner cavity 2 in a circumferential manner, the buffer structure 14 is fixedly arranged on one side of the inner cavity 2 close to the closed groove, the buffer structure 14 comprises an elastic ring 140 and a plurality of elastic blocks 141, one end of each elastic block 141 is fixedly connected with the inner wall of the inner cavity 2 close to the closed groove, the other end of each elastic block is fixedly connected with the elastic ring 140, the fixed connection preferably adopts bonding connection, the elastic block 141 and the elastic ring 140 are preferably made of rubber, the elastic block 141 may also be made of a spring, and when the buffering structure is compressed to the maximum, one surface of the elastic ring 140 close to the elastic block 141 is flush with the lowest surface of the exhaust hole 5, the partial shielding or full shielding of the exhaust hole 5 after the compression of the elastic ring 140 can be avoided, and the design of the elastic blocks 141 can improve the smoothness of the exhaust.

It can be seen from the above structure that the design of the limiting groove 13 is favorable for avoiding the piston body 1 from rotating in the braking process, so as to improve the braking effect, and in addition, the design of the buffer structure 14 is favorable for absorbing the vibration generated in the braking process, so that the abrasion of the piston body 1 is reduced, and the service life is effectively prolonged.

As an alternative embodiment, a heat insulation cavity 15 is arranged in the piston body 1, and the heat insulation cavity 15 is filled with a heat insulation material 16.

It can be seen from the above structure that the heat insulation cavity 15 is arranged to prevent the heat generated in the braking process from being transferred to the inner cavity 2, thereby preventing the influence or damage to the inner structure of the inner cavity 2, and the heat insulation effect of the piston body 1 can be further improved by filling the heat insulation material 16.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (5)

1. The utility model provides a wear-resisting type braking pincers piston that radiating effect is good, includes piston body (1) and inner chamber (2), piston body (1) one end is blind end (10), and the other end is open end (11), characterized by: the surface mounting that piston body (1) is located blind end (10) is equipped with bellying (3), bellying (3) upper surface is equipped with circular recess (4), one side that inner chamber (2) are close to blind end (10) is along radially being equipped with a plurality of exhaust holes (5), one side that the axle center was kept away from in exhaust hole (5) is equipped with air discharge duct (6), inner chamber (2) from interior to exterior is including flat portion (20), narrow portion (21) and wide portion (22), be equipped with wear-resisting structure (7) on flat portion (20), equidistant circumference distributes on the inner wall of narrow portion (21) and is equipped with a plurality of radiating grooves (8), the diameter from interior to exterior of wide portion (22) inner wall increases in proper order, one side that piston body (1) is close to air discharge duct (6) is equipped with seal groove (9).

2. A wear-resistant brake caliper piston according to claim 1, having a high heat dissipation efficiency, wherein: wear-resisting structure (7) include first ring channel (70) and second ring channel (71), the inner wall between first ring channel (70) and second ring channel (71) is undergauge portion (72), the diameter of undergauge portion (72) is greater than the diameter of other positions of flat portion (20) inner wall, all fixed wear-resisting lubricant film (73) that are equipped with in first ring channel (70) and second ring channel (71).

3. A wear-resistant brake caliper piston according to claim 2, further comprising: a plurality of annular grooves (12) are distributed on the inner wall of the inner cavity (2) and are positioned on the reducing part (72) at equal intervals.

4. A wear-resistant brake caliper piston according to claim 3, further comprising: the inner wall of inner chamber (2) is gone up the circumference and is distributed and be equipped with a plurality of spacing grooves (13), inner chamber (2) are close to closed slot one side and fixedly are equipped with buffer structure (14), buffer structure (14) include elastic ring (140) and a plurality of elastic block (141), and are a plurality of elastic block (141) one end is close to the inner wall fixed connection of blind end (10) one side with inner chamber (2), the other end and elastic ring (140) fixed connection.

5. A wear-resistant brake caliper piston according to claim 4, further comprising: a heat insulation cavity (15) is arranged in the piston body (1), and heat insulation materials (16) are filled in the heat insulation cavity (15).

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