CN108644259B

CN108644259B - Electric automobile brake hub sleeve and manufacturing method thereof

Info

Publication number: CN108644259B
Application number: CN201810374815.4A
Authority: CN
Inventors: 谷远东; 洪登栾
Original assignee: Jiangsu Zhongli Gear Co ltd
Current assignee: Jiangsu Zhongli Gear Co ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2023-05-16
Anticipated expiration: 2038-04-24
Also published as: CN108644259A

Abstract

An electric automobile brake hub sleeve and a manufacturing method thereof relate to a brake hub and a manufacturing method thereof. The hub sleeve body comprises an outer cylinder and an inner cylinder which are coaxially sleeved at intervals, one end of the inner side wall of the outer cylinder is fixedly connected with one end of the outer side wall of the inner cylinder through a plurality of connecting parts, the outer cylinder, the inner cylinder and the plurality of connecting parts are integrally manufactured, the appearance of the reinforcing member is cylindrical, a plurality of grooves are formed in the inner side wall of the reinforcing member at equal intervals, at least one first heat extraction pinhole is correspondingly penetrated through the outer side wall of the reinforcing member and each groove, the reinforcing member is fixedly inserted in the interval area of the outer cylinder and the inner cylinder, openings which are matched with the plurality of connecting parts one by one are formed in one at one ends of the corresponding parts of the reinforcing member and the plurality of connecting parts, and second heat extraction pinholes are penetrated through the corresponding positions of the wall of the outer cylinder and each first heat extraction pinhole. The hub sleeve body structure is skillfully optimized, and the reinforcing member is additionally arranged, so that the hub sleeve body can be effectively limited from being deformed by heat, and the heat dissipation performance is improved.

Description

Electric automobile brake hub sleeve and manufacturing method thereof

Technical Field

The invention relates to a brake hub and a manufacturing method thereof, in particular to an electric automobile brake hub sleeve and a manufacturing method thereof.

Background

The hub sleeve is an important component of an automobile brake, and when the automobile brakes, the piston applies pressure to the two brake shoes, so that the two brake shoes are abutted against the inner wall of the hub sleeve, and friction is generated to brake the automobile.

The main problem of the hub sleeve at present is that the diameter of the hub sleeve is increased after friction is generated and heated, so that the stroke of pressing a brake pedal is increased, and a situation that a braking reaction is not as expected easily occurs. The two most important points for solving the problem are how to limit the deformation (diameter increase) of the hub sleeve after being heated and how to improve the heat dissipation performance of the hub sleeve.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides an electric automobile brake hub sleeve and a manufacturing method thereof.

The invention adopts the following technical scheme: the utility model provides an electric automobile brake hub sleeve, includes hub sleeve body, electric automobile brake hub sleeve still include the stiffening member, hub sleeve body include outer drum and inner cylinder that coaxial spacer sleeve was established, outer drum inside wall one end with inner cylinder outside wall one end pass through a plurality of connecting portion rigid couplings, a plurality of connecting portion equidistant setting, outer drum, inner cylinder and a plurality of connecting portion make as an organic wholely, the stiffening member appearance be with outer drum and inner cylinder interval region assorted cylindric, stiffening member inside wall intermediate position along its circumferencial direction equidistant be equipped with a plurality of recesses, stiffening member outside wall and every the recess correspond to link up there is at least one heat extraction pinhole one, the stiffening member cartridge is fixed in outer drum and inner cylinder in the interval region, the stiffening member corresponds one end with a plurality of connecting portion and is equipped with the opening that matches one by one, and a plurality of opening and a plurality of recess setting, outer drum wall and every heat extraction pinhole one correspond the position and link up two heat extraction pinholes.

The invention discloses a manufacturing method of an electric automobile brake hub sleeve, which comprises the following steps:

step one: prefabricating a first die corresponding to the hub sleeve body, pouring liquid metal melted by HT250 gray cast iron into a cavity of the first die, cooling and forming, and removing the first die, and integrally forming an outer cylinder, an inner cylinder and a plurality of connecting parts;

step two: the surface of the hub sleeve body is processed and grinded, so that the smooth surface is ensured to be free from burr and scratch and the outline is clear;

step three: the inner side wall of the inner cylinder of the hub sleeve body is compounded and fixed with a wear-resistant layer by extrusion casting, and the wear-resistant layer is made of ceramic reinforced materials;

step four: prefabricating a second die corresponding to the reinforcing member, pouring liquid metal after melting 440C stainless steel into a cavity of the second die, cooling and forming, and removing the second die;

step five: the surface of the reinforcing member and the inner side of the groove wall and the opening are processed and grinded, so that the smooth and clean surface without burr and scratch and the clear outline are ensured;

step six: the reinforcing member is welded and fixed with the hub sleeve body, so that the plurality of groove openings are sealed well by the outer side wall of the inner cylinder;

step seven: and grinding and drilling the positions of the outer side wall of the outer cylinder corresponding to each groove of the reinforcing member to enable the outer cylinder to form a second heat extraction pinhole, enabling the reinforcing member to form a first heat extraction pinhole, and cleaning the interior of the first heat extraction pinhole and the interior of the second heat extraction pinhole.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the hub sleeve body structure is skillfully optimized, a spacing area is reserved between the outer cylinder and the inner cylinder and then is connected and fixed by a plurality of connecting parts, the reinforcing member is matched and fixed in the spacing area, the hub sleeve body is effectively limited to be deformed by heat, meanwhile, the reinforcing member is provided with a plurality of grooves, the outer side wall of the inner cylinder can seal the notches of the grooves, each groove is communicated with the outside only through the first heat extraction pinhole and the second heat extraction pinhole corresponding to the outer cylinder, the heated and pressurized inside the groove is discharged from the first heat extraction pinhole and the second heat extraction pinhole corresponding to the heat extraction pinhole, the heat dissipation performance is improved, the inner side wall of the inner cylinder is provided with a wear-resisting layer to increase friction, the service life is prolonged, and the structure is simple and effective, and popularization is facilitated.

Drawings

FIG. 1 is an isometric view of the overall construction of an electric vehicle brake hub sleeve of the present invention;

FIG. 2 is an isometric view of a disassembled structure of the present invention;

fig. 3 is an enlarged view of a portion a of fig. 2;

fig. 4 is an enlarged view of a portion B of fig. 2;

fig. 5 is an isometric view of the hub sleeve body of the present invention.

Detailed Description

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are all within the protection scope of the present invention.

The first embodiment is as follows: as shown in fig. 1-5, the invention discloses an electric automobile brake hub sleeve, which comprises a hub sleeve body 1, the electric automobile brake hub sleeve further comprises a reinforcing member 2, the hub sleeve body 1 comprises an outer cylinder 1-1 and an inner cylinder 1-2 which are coaxially sleeved at intervals, one end of the inner side wall of the outer cylinder 1-1 is fixedly connected with one end of the outer side wall of the inner cylinder 1-2 through a plurality of connecting parts 1-3, the plurality of connecting parts 1-3 are arranged at equal intervals, the outer cylinder 1-1, the inner cylinder 1-2 and the plurality of connecting parts 1-3 are integrally manufactured, the reinforcing member 2 is in a cylinder shape matched with the interval area of the outer cylinder 1-1 and the inner cylinder 1-2, a plurality of grooves 2-2 are formed in the middle position of the inner side wall of the reinforcing member 2 at equal intervals along the circumferential direction of the reinforcing member, at least one pinhole is penetrated through each groove 2-3 corresponding to the outer side wall of the reinforcing member 2-2, the reinforcing member 2 is fixedly inserted into the outer cylinder 1-1 and the heat exhausting part corresponding to the grooves 1-2, the heat exhausting part is connected with the plurality of pinholes 1-2-1-2 through the plurality of grooves 1-2-1, and the heat exhausting part is arranged at the positions corresponding to the plurality of pinholes 1-2-1-2, and the heat exhausting part is connected with the plurality of grooves 1-2-1-2 through the heat exhausting part and the corresponding part is arranged at the positions corresponding to the heat exhausting part 1-2 through the heat exhausting part.

The second embodiment is as follows: as shown in fig. 1 and 2, this embodiment is further described in the first embodiment, and the inner side wall of the inner cylinder 1-2 is compositely fixed with the wear-resistant layer 3.

And a third specific embodiment: as shown in fig. 5, this embodiment is further described with respect to the first embodiment or the second embodiment, and the number of the plurality of connection portions 1-3 is 3 to 8.

The specific embodiment IV is as follows: as shown in fig. 2 and 4, this embodiment is further described in the third embodiment, and the number of the plurality of grooves 2-2 is 6 to 12.

Fifth embodiment: as shown in fig. 2, 3 and 4, this embodiment is further described in the fourth embodiment, where the diameters of the first heat extraction pinhole 2-3 and the second heat extraction pinhole 1-4 are 1-3 mm.

Specific embodiment six: as shown in fig. 2, this embodiment is further described with respect to the first embodiment, the hub sleeve body 1 is made of HT250 gray cast iron, and the reinforcing member 2 is made of 440C stainless steel.

Seventh embodiment: as shown in fig. 1 to 5, the present embodiment discloses a method for manufacturing a brake hub sleeve of an electric automobile according to any one of the first to sixth embodiments, the method comprising the following steps:

step one: prefabricating a first die corresponding to the hub sleeve body 1, pouring liquid metal melted by HT250 gray cast iron into a cavity of the first die, cooling and forming, and removing the first die, and integrally forming an outer cylinder 1-1, an inner cylinder 1-2 and a plurality of connecting parts 1-3;

step two: the surface of the hub sleeve body 1 is processed and grinded, so that the smooth surface without burr and scratch and the clear outline are ensured;

step three: the wear-resistant layer 3 is fixed on the inner side wall of the inner cylinder 1-2 of the hub sleeve body 1 in a compound way through extrusion casting, and the wear-resistant layer 3 is made of ceramic reinforced materials;

step four: prefabricating a second die corresponding to the reinforcing member 2, pouring liquid metal after melting 440C stainless steel into a cavity of the second die, cooling and forming, and removing the second die;

step five: the surface of the reinforcing member 2 and the groove wall of the groove 2-2 and the inner side of the notch 2-1 are processed and grinded, so that the smooth surface without burr and scratch and the clear outline are ensured;

step six: the reinforcing member 2 is welded and fixed with the hub sleeve body 1, so that the outer side wall of the inner cylinder 1-2 is ensured to well seal a plurality of grooves 2-2 notches;

step seven: grinding and drilling are carried out on the outer side wall of the outer cylinder 1-1 and the corresponding position of each groove 2-2 of the reinforcing member 2, so that the outer cylinder 1-1 forms a heat extraction pinhole II 1-4, the reinforcing member 2 forms a heat extraction pinhole I2-3, and the heat extraction pinholes I2-3 and the inside of the heat extraction pinholes II 1-4 are cleaned.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides an electric automobile stopper hub sleeve, includes hub sleeve body (1), its characterized in that: the electric automobile brake hub sleeve also comprises a reinforcing member (2), the hub sleeve body (1) comprises an outer cylinder (1-1) and an inner cylinder (1-2) which are coaxially sleeved at intervals, one end of the inner side wall of the outer cylinder (1-1) is fixedly connected with one end of the outer side wall of the inner cylinder (1-2) through a plurality of connecting parts (1-3), the plurality of connecting parts (1-3) are arranged at equal intervals, the outer cylinder (1-1), the inner cylinder (1-2) and the plurality of connecting parts (1-3) are integrally manufactured, the reinforcing member (2) is cylindrical and matched with the interval areas of the outer cylinder (1-1) and the inner cylinder (1-2), a plurality of grooves (2-2) are formed in the middle position of the inner side wall of the reinforcing member (2) at equal intervals along the circumferential direction, at least one heat exhausting hole (2-3) is correspondingly communicated with each groove (2-2), the reinforcing member (2) is fixedly arranged in the outer cylinder (1-1) and the inner cylinder (1-2) in a mode of being inserted and fixed in the corresponding mode, the plurality of pinholes are formed in the corresponding mode, one end of the reinforcing member (1-2) and the reinforcing member (1-2) are in the corresponding mode of the plurality of connecting parts (1-2) are provided with the corresponding openings (1-2), the openings (2-1) and the grooves (2-2) are arranged in a staggered mode, and the corresponding positions of the cylinder wall of the outer cylinder (1-1) and each heat extraction pinhole (2-3) are communicated with a heat extraction pinhole (1-4);

the manufacturing method of the electric automobile brake hub sleeve comprises the following steps:

step one: prefabricating a first die corresponding to the hub sleeve body (1), pouring liquid metal melted by HT250 gray cast iron into a cavity of the first die, cooling and forming, removing the first die, and integrally forming an outer cylinder (1-1), an inner cylinder (1-2) and a plurality of connecting parts (1-3);

step two: the surface of the hub sleeve body (1) is processed and grinded, so that the smooth surface without burr and scratch and the clear outline are ensured;

step three: the wear-resistant layer (3) is fixed on the inner side wall of the inner cylinder (1-2) of the hub sleeve body (1) in a compound way through extrusion casting, and the wear-resistant layer (3) is made of ceramic reinforced materials;

step four: prefabricating a second die corresponding to the reinforcing member (2), pouring liquid metal after melting 440C stainless steel into a cavity of the second die, cooling and forming, and removing the second die;

step five: the surface of the reinforcing member (2) and the inner side of the groove wall of the groove (2-2) and the notch (2-1) are processed and grinded, so that the smooth surface without burr and scratch and the clear outline are ensured;

step six: welding and fixing the reinforcing member (2) and the hub sleeve body (1), and ensuring that the outer side wall of the inner cylinder (1-2) well seals the notches of the plurality of grooves (2-2);

step seven: and grinding and drilling the outer side wall of the outer cylinder (1-1) and the corresponding position of each groove (2-2) of the reinforcing member (2), so that the outer cylinder (1-1) forms a second heat extraction pinhole (1-4), the reinforcing member (2) forms a first heat extraction pinhole (2-3), and the interior of the first heat extraction pinhole (2-3) and the interior of the second heat extraction pinhole (1-4) are cleaned.

2. An electric vehicle brake hub sleeve according to claim 1, wherein: the inner side wall of the inner cylinder (1-2) is compositely fixed with a wear-resistant layer (3).

3. An electric vehicle brake hub sleeve according to claim 1 or 2, characterized in that: the number of the plurality of connecting parts (1-3) is 3-8.

4. An electric vehicle brake hub sleeve according to claim 3, wherein: the number of the grooves (2-2) is 6-12.

5. An electric vehicle brake hub sleeve according to claim 4, wherein: the diameters of the first heat extraction pinhole (2-3) and the second heat extraction pinhole (1-4) are 1-3 mm.

6. An electric vehicle brake hub sleeve according to claim 1, wherein: the hub sleeve body (1) is made of HT250 gray cast iron, and the reinforcing member (2) is made of 440C stainless steel.