CN214380436U

CN214380436U - EPB motor

Info

Publication number: CN214380436U
Application number: CN202120529428.0U
Authority: CN
Inventors: 罗运良; 尹祖军
Original assignee: TAISHAN JIANGKOU ELECTRIC APPLIANCE MANUFACTORY Ltd
Current assignee: TAISHAN JIANGKOU ELECTRIC APPLIANCE MANUFACTORY Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-10-08
Anticipated expiration: 2031-03-12

Abstract

The utility model discloses an EPB motor, which comprises a shell, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are arranged at the port of the shell; the carbon brush assembly comprises a carbon brush plate, a carbon brush box and a carbon brush, wherein a carbon brush frame is arranged on the carbon brush plate, an installation sliding groove is formed in the carbon brush frame, the installation sliding groove is formed in the radial direction of the rotor, the carbon brush box is matched and inserted in the installation sliding groove, and the end portion of the carbon brush is in sliding butt joint with the commutator. The utility model discloses a EPB motor, carbon brush box are pegged graft the installation by the side of motor for the installation of carbon brush box does not receive the restriction in motor axial space, and during the installation carbon brush box, direct can be along electric motor rotor's radial installation carbon brush box, greatly made things convenient for the installation of carbon brush box.

Description

EPB motor

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to EPB motor.

Background

EPB is an abbreviation of electric Park Brake, and the electronic parking Brake system can provide better help for a driver, and an electronic hand Brake button replacing a traditional pull rod hand Brake is safer than the traditional pull rod hand Brake, and the Brake effect cannot be changed due to the strength of a driver.

The EPB motor is an important component forming an electronic parking brake system and comprises a stator, a rotor, a commutator, a carbon brush assembly and the like. The carbon brushes in the EPB motor are used in a phase converter or a slip ring as a sliding contact for leading out and leading in current. The carbon brush is generally installed in the radial direction of the rotor, and during operation, the carbon brush needs to be installed in the carbon brush box, and then the carbon brush box is installed on the carbon brush plate. The carbon brush box is a component for mounting the carbon brush, and the carbon brush plate is used for applying pressure to the carbon brush which is in sliding contact with the surface of the commutator or the collecting ring through a spring so as to stably conduct current between the fixed body and the rotating body. Both the carbon brush box and the carbon brush plate are very important components for EPB motors.

In the existing EPB motor, the carbon brush box is provided with pins, and the carbon brush plate is provided with sockets for the pins to be inserted in a matching manner, wherein the pins and the sockets are arranged in parallel to the axial direction of the rotor, i.e., perpendicular to the installation direction of the carbon brush. Because the grafting direction of carbon brush box is on a parallel with the axial of motor rotor, the installation of carbon brush box receives the restriction of motor axial space, brings inconvenience for the installation of carbon brush box.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an EPB motor to effectively solve prior art's weak point.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an EPB motor comprises a shell, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are covered on a port of the shell, a stator, a rotor and a commutator sleeved at one end, close to the lower end cover, of the rotor are arranged in the shell, and a carbon brush assembly in sliding butt joint with the commutator is arranged on the lower end cover; the carbon brush assembly comprises a carbon brush plate, a carbon brush box and a carbon brush arranged in the carbon brush box, the carbon brush plate is arranged on the lower end cover, at least one carbon brush frame is arranged on the carbon brush plate, an installation sliding groove is formed in the carbon brush frame, the installation sliding groove is formed in the radial direction of the rotor, the carbon brush box is matched and inserted in the installation sliding groove, and the end portion of the carbon brush is in sliding butt joint with the commutator.

Compared with the prior art, the utility model discloses a EPB motor, carbon brush subassembly on it is provided with the carbon brush frame including the carbon brush board on the carbon brush board, be provided with the installation spout that supplies the carbon brush box to match the installation on the carbon brush frame, and should install the spout along the radial setting of rotor, carbon brush box and the carbon brush on it radially pegs graft in the installation spout along the rotor. The carbon brush box is installed by the side grafting of motor for the installation of carbon brush box is not received the restriction in motor axial space, and during the installation carbon brush box, direct can be along electric motor rotor's radial installation carbon brush box, has greatly made things convenient for the installation of carbon brush box. Different from the mounting means of carbon brush box in current EPB motor, the utility model discloses an EPB motor adopts the mode of radial installation of rotor along the carbon brush box, and the design is exquisite, simple structure, and simple to operate has stronger practicality.

Further, the outer diameter of the upper end cover is not smaller than that of the shell, and the upper end cover covers the port of the shell in a welding mode; at least one positioning block radially extends from the edge of the upper end cover.

A positioning block is arranged to facilitate the EPB motor of the utility model to be inserted on the external bracket; and the external diameter that sets up the upper end cover is not less than the external diameter of casing to it is fixed through the welded mode, during the installation, only need with the laminating of upper end cover at the tip of casing, again between the tip of upper end cover and the casing weld can, for the mode that needs open out the notch at the tip of casing among the prior art, in order to supply the upper end cover joint, the utility model provides a set up reducible grooved process, and then reduce cost.

Furthermore, the positioning blocks are arranged at equal intervals along the circumferential direction of the upper end cover, and the sizes of the projection sections of the positioning blocks on the end face of the upper end cover are different.

Set up the projected cross sectional dimension size nonconformity of locating piece on the upper end cover terminal surface, can ensure the utility model discloses the installation position of EPB motor prevents that installation angle position from makeing mistakes.

Furthermore, the upper end cover, the lower end cover and the shell are all made of metal materials.

Set up upper end cover, lower extreme cover and casing into the metal material, can shield unnecessary electromagnetic interference, guarantee the utility model discloses the stability of EPB motor operation.

Furthermore, the carbon brush box comprises a carbon brush cover for installing the carbon brush and a pressing plate, the cross section of the carbon brush cover is in an inverted U shape, the lower edge of the inverted U shape of the carbon brush cover extends outwards from the left side and the right side respectively, a positioning hole is formed in the flanging edge, and a positioning column matched with the positioning hole in an inserted mode is arranged on the pressing plate; the left side and the right side of the carbon brush box are respectively provided with at least one latch, and a clamping groove is formed in the mounting chute corresponding to the latch.

The carbon brush cover is provided with a flanging, the pressing plate is attached to the lower portion of the flanging and is fixedly connected in a mode of inserting the positioning columns and the positioning holes, and the carbon brush cover and the pressing plate are convenient to assemble. Simultaneously, the left and right sides of carbon brush box is provided with the latch along the left and right sides of carbon brush installation direction promptly, and it is provided with the draw-in groove to correspond the latch in the installation spout, and when the carbon brush box was pegged graft in the installation spout, the latch on the carbon brush box and the draw-in groove in the installation spout match, and then fix the installation of carbon brush box in the installation spout.

Further, the latch is provided on an outer end surface of the burring.

The clamping teeth are arranged on the turned edges, and the turned edges are thin, so that the difficulty in installing the carbon brush box can be reduced, and the carbon brush box can be conveniently installed.

Further, the latch comprises a lead-in surface and a buckling surface, and the buckling surface faces away from the rotor;

and a notch is arranged at the connecting position of the buckling surface and the flanging.

Set up leading-in face and buckle face in order to realize the buckle effect of latch, set up the breach at buckle face and turn-ups hookup location, the elasticity of multiplicable latch to conveniently install the brush-box.

Further, the pressure plate is gradually narrowed from the rear end to the front end thereof.

The pressing plate is arranged to be gradually narrowed from the rear end to the front end, namely, the pressing plate is gradually narrowed along the installation direction of the carbon brush, so that the carbon brush box is convenient to install, the head of the pressing plate is narrow, the carbon brush box is convenient to install, and the carbon brush box is not easy to slide on two sides of the installation direction of the carbon brush after being installed.

Further, the height of the mounting chute in the central axis direction of the carbon brush plate is equal to the sum of the thickness of the pressing plate and the height of the positioning column;

the top of installation spout along carbon brush board center pin direction is provided with the opening, the width of opening is not less than the width of carbon brush cover.

The height of the installation sliding groove in the direction of the central shaft of the carbon brush plate is equal to the sum of the thickness of the pressing plate and the height of the positioning column, so that the carbon brush box cannot shake after being installed, and the installation tightness is guaranteed;

the opening is formed in the top of the installation sliding groove, and the carbon brush cover extends out of the opening, so that the height of the carbon brush cover can be adjusted according to actual requirements, and carbon brushes with different specifications and sizes can be installed. By increasing the cross-sectional area of the carbon brush, the electrical density can be reduced to suit the needs of practical situations.

Furthermore, a plurality of reinforcing ribs are arranged on the outer side wall of the mounting chute.

Set up the strengthening rib to guarantee the structural strength of installation spout, prevent that the installation spout from warping or breaking.

In order that the present invention may be more clearly understood, specific embodiments of the present invention will be described below with reference to the accompanying drawings.

Drawings

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

FIG. 2 is a top view of the structure of the present invention;

FIG. 3 is an exploded view of the structure of the present invention;

FIG. 4 is a schematic structural view of a carbon brush box according to the present invention;

FIG. 5 is an exploded view of the carbon brush box structure of the present invention;

fig. 6 is a top view of the middle press plate of the present invention;

FIG. 7 is a schematic structural view of a carbon brush plate according to the present invention;

FIG. 8 is a schematic sectional view of the structure of the middle carbon brush plate of the present invention;

fig. 9 is an installation schematic diagram of the carbon brush box and the carbon brush in the present invention.

Wherein the reference numerals are:

10. an upper end cover; 11. positioning blocks; 20. a housing; 30. a lower end cover; 40. a stator; 50. a rotor; 60. a commutator; 71. a carbon brush plate; 72. a carbon brush box; 73. a carbon brush; 711. a carbon brush holder; 712. installing a chute; 713. a card slot; 714. reinforcing ribs; 715. an opening; 721. a carbon brush cover; 722. pressing a plate; 723. flanging; 724. positioning holes; 725. a positioning column; 726. an expansion slot; 80. clamping teeth; 81. a lead-in surface; 82. a buckle surface; 83. and (4) a notch.

Detailed Description

As shown in fig. 1 to 9, an EPB motor includes a housing 20, and an upper end cap 10 and a lower end cap 30 disposed at an end port of the housing 20, wherein a stator 40, a rotor 50, and a commutator 60 sleeved on one end of the rotor 50 close to the lower end cap 30 are disposed in the housing 20, and a carbon brush assembly slidably abutted to the commutator 60 is disposed on the lower end cap 30; the carbon brush assembly comprises a carbon brush plate 71, a carbon brush box 72 and a carbon brush 73 arranged in the carbon brush box 72, wherein the carbon brush plate 71 is fixedly arranged on the lower end cover 30, at least one carbon brush frame 711 is arranged on the carbon brush plate 71, an installation sliding groove 712 is arranged on each corresponding carbon brush frame 711, the installation sliding grooves 712 are arranged along the radial direction of the rotor 50, the carbon brush box 72 is inserted into the installation sliding grooves 712 in a matched mode, and the end portion of the carbon brush 73 is in sliding abutting joint with the commutator 60, as shown in fig. 3.

Specifically, the upper end cover 10 and the housing 20 are coaxially disposed, an outer diameter of the upper end cover 10 is not smaller than an outer diameter of the housing 20, and the upper end cover 10 covers a port of the housing 20 by welding. After the upper end cover 10 is covered on the port of the housing 20, the end surface of the upper end cover 10 and the outer side wall of the housing 20 are welded and fixed, and thus the upper end cover 10 and the housing 20 can be mounted.

For convenience, the EPB motor of the present invention is inserted into an external bracket (not shown), and the edge of the upper end cap 10 is extended radially with at least one positioning block 11.

More specifically, at least two positioning blocks 11 are arranged at equal intervals along the circumferential direction of the upper end cover 10, and the sizes of the cross sections of the positioning blocks 11 projected on the end face of the upper end cover 10 are different.

In a preferred embodiment, six positioning blocks 11 are arranged at equal intervals along the circumferential direction of the upper end cover 10; the six positioning blocks 11 have the same width along the radial direction of the upper end cover 10, and one of the positioning blocks 11 has a larger length along the circumferential direction of the upper end cover 10, as shown in fig. 2. The utility model discloses a when EPB motor cartridge was on the outside support, with the great that locating piece 11 of length insert the position that corresponds, alright ensure that the installation position is accurate, prevent that installation angle position from makeing mistakes.

More specifically, the utility model discloses the shell of EPB motor is the metal material, specifically, upper end cover 10 the lower extreme cover 30 with casing 20 is the metal material to shield unnecessary electromagnetic interference, guarantee the stability of motor operation.

More specifically, as shown in fig. 4 and 5, the carbon brush box 72 includes a carbon brush cover 721 for mounting the carbon brush 73 and a pressing plate 722, a cross section of the carbon brush cover 721 is an inverted "U" shape, flanges 723 respectively extend outwards from left and right sides of the lower edge of the inverted "U" shape of the carbon brush cover 721, as shown in fig. 5, the flanges 723 are disposed outside an open end of the inverted "U" shape of the carbon brush cover 721, and the flanges 723 and the carbon brush cover 721 are integrally formed.

The flanging 723 is provided with positioning holes 724, the pressure plate 722 is provided with positioning posts 725 inserted and matched with the positioning holes 724, as shown in fig. 4 and 5, the pressure plate 722 is attached to and arranged below the two flanging 723, wherein the two positioning posts 725 are arranged on the left and the right, and the two positioning holes 724 are arranged on the left and the right correspondingly.

The left side and the right side of the carbon brush box 72 are respectively provided with at least one latch 80, and a clamping groove 713 is arranged in the mounting sliding groove 712 corresponding to the latch 80. In the preferred embodiment, the latch 80 is disposed on an outer end surface of the flange 723. The latch 80 is disposed corresponding to each flange 723, as shown in fig. 5, and the latch 80 and the corresponding flange 723 are integrally formed.

Specifically, the locking groove 713 penetrates through an outer side wall of the mounting sliding groove 712, as shown in fig. 7 and 8, the locking groove 713 penetrates through an outer side wall of the mounting sliding groove 712, so as to facilitate injection molding of the mounting sliding groove 712 and the locking groove 713.

More specifically, as shown in fig. 5, the latch 80 includes a lead-in surface 81 and a latching surface 82, the latching surface 82 faces the rear end of the carbon brush cover 721, i.e., faces away from the mounting direction of the carbon brush 73, and a plane on which the latching surface 82 is located is perpendicular to the mounting direction of the carbon brush 73.

In order to increase the elasticity of the latch 80 and facilitate the quick installation of the carbon brush box 72, a gap 83 is provided at the connecting position of the latch surface 82 and the flange 723, as shown in fig. 5.

More specifically, the carbon brush cover 721 is provided with expanding grooves 726 for increasing tension thereof, and the expanding grooves 726 are provided on both left and right sides of the carbon brush cover 721 and extend from the rear end to the front end of the carbon brush cover 721.

The carbon brush cover 721 and the pressing plate 722 are both in a left-right symmetrical structure. The middle longitudinal surface of the carbon brush cover 721 in the front-back direction is coplanar with the middle longitudinal surface of the pressure plate 722 in the front-back direction, and the distance between the outer end surfaces of the two flanges 723 is not greater than the width of the pressure plate 722, that is, the outer end surfaces of the two flanges 723 are located between the left end surface and the right end surface of the pressure plate 722.

More specifically, the pressing plate 722 is gradually narrowed from the rear end to the front end, that is, along the installation direction of the carbon brush 73, the pressing plate 722 is gradually narrowed along the installation direction of the carbon brush 73, so that the head of the pressing plate 722 is narrow, which is convenient for the wedging installation of the carbon brush box 72, and meanwhile, the pressing plate 722 with a certain inclination angle can prevent the carbon brush box 72 from sliding in the left-right direction after being installed.

In the preferred embodiment, an angle formed by the side end surface of the pressing plate 722 and the middle longitudinal surface of the pressing plate 722 in the front-rear direction is 0.7 °, that is, an angle at which the pressing plate 722 narrows is 1.4 °, as shown in fig. 6.

In the preferred embodiment, two carbon brush holders 711 are provided corresponding to the radial direction of the carbon brush plate 71, as shown in fig. 7.

The height of the mounting chute 712 in the direction of the central axis of the carbon brush plate 71 is equal to the sum of the thickness of the pressing plate 722 and the height of the positioning post 725, so that the carbon brush box 72 does not shake in the vertical direction after being mounted, and the mounting tightness is ensured.

An opening 715 is provided at a top of the mounting chute 712 in a direction of a central axis of the carbon brush plate 71, and a width of the opening 715 is not smaller than a width of the carbon brush cover 721. An opening 715 is formed in the top of the installation chute 712, and the carbon brush cover 721 extends out of the opening 715, so that in the actual production and manufacture, the height of the carbon brush cover 721 can be adjusted according to the requirement of the working condition, so as to install carbon brushes 73 with different specifications and sizes. The height of the carbon brush cover 721 is increased to increase the sectional area of the carbon brush 73, thereby reducing the electric density to meet the actual demand.

More specifically, since the pressing plate 722 is gradually narrowed along the installation direction of the carbon brush 73, correspondingly, the installation sliding groove 712 is also gradually narrowed along the installation direction of the carbon brush 73, and in order to ensure the tightness of the wedge installation, in the present embodiment, the angle of narrowing of the installation sliding groove 712 is set to 1.6 °, as shown in fig. 8. The narrowing angle of the mounting chute 712 is slightly larger than the narrowing angle of the pressing plate 722, so that when the carbon brush box 72 is wedged and mounted in the mounting chute 712, a certain elastic force is provided between the end side wall of the pressing plate 722 and the inner side wall of the mounting chute 712, so as to ensure that the wedging between the two is tighter.

The entrance of the installation chute 712 is larger, and the interior gradually becomes smaller, so that the insertion of the pressing plate 722 can be facilitated, and the displacement of the pressing plate 722 in the left-right direction in the installation chute 712 can be reduced.

More specifically, in order to increase and ensure the structural strength of the mounting chute 712 and prevent the mounting chute 712 from being deformed or broken, a plurality of reinforcing ribs 714 are provided on the outer side wall of the mounting chute 712, and at least three reinforcing ribs 714 are provided along the insertion direction of the carbon brush box 72.

When the carbon brush box 72 is assembled, the carbon brush cover 721 is inserted into the pressing plate 722, so that the positioning posts 725 are inserted into the positioning holes 724, and then the carbon brush 73 to be installed is inserted into the carbon brush cover 721. After the carbon brush box 72 is assembled, the assembled carbon brush box 72 is inserted into the mounting sliding groove 712, so that the latch 80 on the carbon brush box 72 is fastened in the fastening groove 713 of the mounting sliding groove 712, the carbon brush box 72 can be mounted and fixed, and the end of the carbon brush 73 is in sliding contact with the surface of the commutator 60.

Compared with the prior art, the utility model discloses a EPB motor, carbon brush subassembly on it is provided with the carbon brush frame including the carbon brush board on the carbon brush board, be provided with the installation spout that supplies the carbon brush box to match the installation on the carbon brush frame, and should install the spout along the radial setting of rotor, carbon brush box and the carbon brush on it radially pegs graft in the installation spout along the rotor. The carbon brush box is installed by the side grafting of motor for the installation of carbon brush box is not received the restriction in motor axial space, and during the installation carbon brush box, direct can be along electric motor rotor's radial installation carbon brush box, has greatly made things convenient for the installation of carbon brush box. Different from the mounting means of carbon brush box in current EPB motor, the utility model discloses an EPB motor adopts the mode of radial installation of rotor along the carbon brush box, and the design is exquisite, simple structure, and simple to operate has stronger practicality. And simultaneously, the utility model discloses a EPB motor, the external diameter of its upper end cover is not less than the external diameter of casing to fixed through the welded mode, during the installation, only need with the tip of upper end cover laminating at the casing, again between the tip surface of upper end cover and the casing lateral wall weld can, need open the mode of notch in order to supply the upper end cover joint at the tip of casing among the prior art, the utility model provides a set up reducible grooved process, and then reduce cost.

The above-mentioned embodiments only represent one embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The EPB motor is characterized by comprising a shell (20), an upper end cover (10) and a lower end cover (30) which are arranged at the port of the shell (20), wherein a stator (40), a rotor (50) and a commutator (60) sleeved at one end, close to the lower end cover (30), of the rotor (50) are arranged in the shell (20), and a carbon brush assembly in sliding butt joint with the commutator (60) is arranged on the lower end cover (30); carbon brush subassembly includes carbon brush board (71), carbon brush box (72) and sets up carbon brush (73) in carbon brush box (72), carbon brush board (71) set up on lower end cover (30), be provided with at least one carbon brush frame (711) on carbon brush board (71), be provided with an installation spout (712) on carbon brush frame (711), installation spout (712) are followed the radial setting of rotor (50), carbon brush box (72) matching is inserted and is established in installation spout (712), the tip of carbon brush (73) with commutator (60) slip butt.

2. The EPB motor according to claim 1, wherein an outer diameter of the upper end cap (10) is not smaller than an outer diameter of the housing (20), and the upper end cap (10) is fitted to a port of the housing (20) by welding; at least one positioning block (11) extends along the radial direction of the edge of the upper end cover (10).

3. The EPB motor according to claim 2, wherein the number of the positioning blocks (11) is at least two, and the positioning blocks (11) are arranged at equal intervals along the circumferential direction of the upper end cover (10), and the cross-sectional dimensions of the projections of the positioning blocks (11) on the end face of the upper end cover (10) are different in size.

4. The EPB motor according to claim 1, wherein the upper end cap (10), the lower end cap (30) and the housing (20) are made of metal.

5. The EPB motor according to claim 1, wherein the carbon brush box (72) comprises a carbon brush cover (721) for installing the carbon brush (73) and a pressure plate (722), the cross section of the carbon brush cover (721) is in an inverted U shape, the lower edge of the inverted U shape of the carbon brush cover (721) extends outwards from the left side and the right side respectively to form a flanging (723), the flanging (723) is provided with a positioning hole (724), and the pressure plate (722) is provided with a positioning column (725) which is matched with the positioning hole (724) in an inserting manner; the left side and the right side of the carbon brush box (72) are respectively provided with at least one latch (80), and a clamping groove (713) is arranged in the mounting sliding groove (712) corresponding to the latch (80).

6. The EPB motor according to claim 5, wherein the latch (80) is provided on an outer end face of the burring (723).

7. EPB motor according to claim 6, characterized in that the latch (80) comprises a lead-in face (81) and a snap face (82), the snap face (82) facing away from the rotor (50);

and a gap (83) is arranged at the connecting position of the buckling surface (82) and the flanging (723).

8. The EPB motor of claim 5, wherein the pressure plate (722) tapers from its rear end to its front end.

9. The EPB motor according to claim 5, wherein the height of the mounting chute (712) in the direction of the central axis of the carbon brush plate (71) is equal to the sum of the thickness of the pressing plate (722) and the height of the positioning post (725);

an opening (715) is formed in the top of the mounting chute (712) in the central axis direction of the carbon brush plate (71), and the width of the opening (715) is not less than the width of the carbon brush cover (721).

10. The EPB motor according to any one of claims 1 to 9, wherein a plurality of ribs (714) are provided on the outer side wall of the mounting chute (712).