CN109667859B

CN109667859B - Heat dissipation brake piston

Info

Publication number: CN109667859B
Application number: CN201910003919.9A
Authority: CN
Inventors: 詹爱平; 梁爱云
Original assignee: Anhui Keyuan Machinery Co ltd
Current assignee: Anhui Keyuan Machinery Co ltd
Priority date: 2019-01-03
Filing date: 2019-01-03
Publication date: 2020-06-26
Anticipated expiration: 2039-01-03
Also published as: CN109667859A

Abstract

The invention aims to provide a heat-dissipation brake piston which comprises a piston column and a nose part located at the front end of the piston column and used for being connected with a brake block, wherein the nose part comprises a connecting section fixedly connected with the piston column, an installation section connected with the brake block and a heat dissipation section located between the connecting section and the installation section, the heat dissipation section comprises a plurality of heat dissipation columns, two ends of each heat dissipation column are respectively connected with the connecting section and the installation section, and a fluid passage is formed in a space between the heat dissipation columns. The heat dissipation brake piston can effectively dissipate heat generated by the brake block outwards at the piston, and reduces the conduction of the heat into the actuator body, thereby improving the effective working stability of the brake of the vehicle under long-time working conditions and reducing the failure condition of thermal failure.

Description

Heat dissipation brake piston

Technical Field

The invention relates to the field of automobile brake system parts, in particular to a heat dissipation brake piston.

Background

In a brake caliper of a vehicle, a piston thereon is ejected by applying hydraulic pressure to achieve frictional braking with a wheel hub of the vehicle. During braking, especially in the frequent braking occasions such as long downhill and the like, the brake block connected with the front end of the brake piston can conduct heat generated by friction to the interior of the brake. On one hand, the heat raises the temperature of the mechanical structure of the brake, and the caused heat can reduce the gaps among parts and easily cause the interference problem; on the other hand, gas in the hydraulic oil is heated and separated out, and bubbles in the hydraulic oil can cause the problems of unsmooth ejection action, failure and the like of the piston. Eventually leading to reduced or even failure of the braking capability of the vehicle.

Disclosure of Invention

The invention aims to provide a heat dissipation brake piston, which can effectively dissipate heat generated by a brake block outwards at the piston and reduce the conduction of the heat into an actuator body, thereby improving the effective working stability of a vehicle brake under a long-time working condition and reducing the thermal failure condition.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

the utility model provides a heat dissipation brake piston, includes the piston post and is located the piston post front end is used for connecting the nasal part of brake pad, the nasal part include with the linkage segment of piston post rigid coupling, the installation section of being connected with the brake pad and being located heat dissipation section between linkage segment and the installation section, heat dissipation section includes that a plurality of both ends are connected respectively the heat dissipation post of linkage segment and installation section, the interval space between the heat dissipation post forms the fluid route.

Preferably, the heat dissipation column includes a cylindrical core and a housing located outside the core, and two ends of the housing are respectively and fixedly connected to the connecting section and the mounting section.

In the present invention, the core preferably has a heat dissipating portion extending outward at one end of the housing connected to the mounting segment, and the heat dissipating portion is attached to a surface of the mounting segment.

Preferably, the housing has a cylindrical shape with an opening extending in an axial direction on a side surface.

Preferably, the core side surface has a heat dissipation fin extending outward from the opening.

Preferably, the heat dissipation fin includes a plurality of first fins extending in the same direction as the core axis and second fins perpendicular to the first fins.

Preferably, the first fin extends outwardly from the side of the core a distance less than the distance the second fin extends outwardly from the side of the core.

Preferably, the housing is made of steel.

Preferably, the core is made of copper.

Preferably, the core has a coaxial reinforcing column therein, and the reinforcing column penetrates through the core and has both ends connected to the mounting section and the connecting section.

The invention has the beneficial effects that:

1. the heat dissipation effect is good, the heat generated by the brake block can be effectively taken away at the brake piston through the airflow flowing through the brake, and the efficient heat dissipation is realized;

2. structural strength is high, has good structural stability under the circumstances of guaranteeing effective heat dissipation.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic view of the structure of the heat-dissipating stud according to the present invention;

the items in the figure are respectively: 1 connecting segment, 2 mounting segment, 3 heat dissipation segment, 31 heat dissipation column, 311 core, 312 shell, 313 heat dissipation portion, 314 opening, 315 heat dissipation fin, 3151 first fin, 3152 second fin, 32 fluid passage, 33 reinforcing column.

Detailed Description

The invention is described in detail below with reference to the attached drawing figures:

the heat dissipation brake piston shown in fig. 1 and 2 comprises a piston column formed by cold extrusion and a nose part located at the front end of the piston column and used for being connected with a brake block, wherein the nose part comprises a disc-shaped connecting section 1 fixedly connected with the piston column, a disc-shaped mounting section 2 connected with the brake block and a heat dissipation section 3 located between the connecting section 1 and the mounting section 2, the heat dissipation section 3 comprises a plurality of heat dissipation columns 31 which are in circumferential distribution and are beneficial to supporting a stress structure, two ends of each heat dissipation column 31 are respectively connected with the connecting section 1 and the mounting section 2, and fluid passages 32 are formed in space spaces among the plurality of heat dissipation columns 31. When the brake is in operation, the brake block is in contact with the wheel to generate heat, the heat is transferred from the mounting section 2 to the rear heat dissipation section 3, and air flowing from front to rear can flow through the surface of each heat dissipation column 31 through the fluid passage 32 to take away the heat on the surface.

In this embodiment, the heat dissipating stud 31 includes a cylindrical core 311 and a casing 312 located outside the core 311, and the cylindrical two ends of the casing 312 are respectively fixed to the connecting section 1 and the mounting section 2 by welding.

In this embodiment, the core 311 has a plurality of outward-extending heat dissipation portions 313 in a shape of a thin plate extending outward in a diffusion shape at one end of the casing 312 connected to the mounting section 2, and the heat dissipation portions 313 are attached to the surface of the mounting section 2 by welding to increase the contact area with the mounting section 2, so that heat can be more quickly transferred from the mounting section 2 to the heat dissipation column 31.

In this embodiment, the housing 312 has a cylindrical shape with an opening 314 extending in the axial direction on a side surface. The core 311 has heat dissipation fins 315 welded to the sides thereof, extending outward from the opening 314.

In this embodiment, the heat dissipating fin 315 includes a plurality of first fins 3151 extending in the same direction as the axis of the core 311 and second fins 3152 perpendicular to the first fins 3151 and is formed in a mesh shape so as to increase a heat dissipating area and facilitate an air flow in all directions to conveniently remove heat. The distance that the first fin 3151 extends outwards from the side surface of the core 311 is less than the distance that the second fin 3152 extends outwards from the side surface of the core 311, that is, the height of the second fin 3152 is higher than that of the first fin 3151, that is, the flowing direction of the air flow sent in the direction of the vehicle body is the same as that of the higher second fin 3152, so that the heat exchange efficiency is higher.

In this embodiment, the housing 312 is made of steel, so that the housing has good supporting strength and processability.

In this embodiment, the core 311 is made of copper, so that the auxiliary housing 312 can support the core, and has good heat conduction and heat dissipation effects.

In this embodiment, the core 311 has a coaxial steel reinforcing column 33 therein, and the reinforcing column 33 penetrates through the core 311 and has both ends connected to the mounting segment 2 and the connecting segment 1, thereby further improving the strength of the heat dissipating column 31 supporting the connection segment 1 and the mounting segment 2 at both ends.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention fall into the protection scope of the present invention, and the technical contents of the present invention which are claimed are all described in the claims.

Claims

1. The heat dissipation brake piston comprises a piston column and a nose portion located at the front end of the piston column and used for being connected with a brake block, and is characterized in that the nose portion comprises a connecting section (1) fixedly connected with the piston column, an installation section (2) connected with the brake block and a heat dissipation section (3) located between the connecting section (1) and the installation section (2), the heat dissipation section (3) comprises a plurality of heat dissipation columns (31) with two ends respectively connected with the connecting section (1) and the installation section (2), a fluid passage (32) is formed in a space between the heat dissipation columns (31), each heat dissipation column (31) comprises a cylindrical core body (311) and a shell body (312) located on the outer side of the core body (311), each shell body (312) is in a cylindrical shape with an axially extending opening (314) in the side face, and two ends of each shell body (312) are respectively fixedly connected with the connecting section (1) and the installation section (2), the core (311) is provided with a heat dissipation part (313) extending outwards at one end of the shell (312) connected with the mounting section (2), the heat dissipation part (313) is attached to the surface of the mounting section (2), the side surface of the core (311) is provided with a heat dissipation fin (315) extending outwards from the opening (314), the heat dissipation fin (315) comprises a plurality of first fins (3151) extending in the same direction with the axis of the core (311) and second fins (3152) perpendicular to the first fins (3151), and the distance of the first fins (3151) extending outwards from the side surface of the core (311) is smaller than the distance of the second fins (3152) extending outwards from the side surface of the core (311).

2. A heat-dissipating brake piston according to claim 1, characterized in that the housing (312) is a steel housing (312).

3. A heat-dissipating brake piston according to claim 1, characterized in that the core (311) is a copper core (311).

4. A radiator brake piston according to claim 1, characterised in that the core (311) has a coaxial reinforcing post (33) therein, the reinforcing post (33) extending through the core (311) and connecting the mounting section (2) and the connecting section (1) at both ends.