CN115037085A

CN115037085A - Motor brush assembly

Info

Publication number: CN115037085A
Application number: CN202210663843.4A
Authority: CN
Inventors: 赵占伟; 赵占远
Original assignee: Xuzhou Hengju Electromechanical Technology Co ltd
Current assignee: Xuzhou Hengju Electromechanical Technology Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-09-09

Abstract

The invention relates to the technical field of conductive components, and discloses a motor brush component which comprises a pair of mounting frames 1, wherein the fixing structure of a brush in the mounting frames 1 is the same as that in the prior art, so that the details are not repeated herein, in addition, a pair of rod bodies 2 are also arranged between the mounting frames 1, two ends of each rod body 2 are respectively and fixedly connected with the two mounting frames 1, and the middle parts of the rod bodies 2 adopt horizontal straight rods, and the two rod bodies 2 are controlled to synchronously move up and down, so that the brushes on the mounting frames 1 are driven to synchronously move up and down, the uniform stress of a commutator and a rotor rotating shaft 3 is further ensured, and the bearing abrasion for supporting the rotor rotating shaft 3 is reduced.

Description

Motor brush assembly

Technical Field

The invention relates to the technical field of conductive components, in particular to a motor brush component.

Background

The brush motor in the existing electric vehicle needs to replace the inner carbon brush after being used for about one year, the driving mileage of the motor vehicle charged once after the inner carbon brush is replaced is less than two thirds of that of a new vehicle when the new vehicle is bought, and the power is obviously insufficient when the motor vehicle climbs a slope, and the controller can be burnt out. .

The prior publication No. CN111555525B discloses a motor brush assembly, which comprises a base ring disc, brush mechanisms, a U-shaped swing rod, a swing pin, a cam, a worm wheel and a worm, wherein the base ring disc is arranged in a rear end cover of a motor, and the base ring disc is symmetrically provided with two brush mechanisms matched with a commutator; the cam is driven to rotate through the transmission of the worm gear, the two U-shaped oscillating bars are driven to swing around the oscillating pin by the rotation of the cam, the two swinging U-shaped oscillating bars drive the two carbon brushes in the two electric brush mechanisms at the two ends to slide in the axial direction of the motor rotor relative to the commutator in the opposite or reverse direction, so that the abrasion of the part on the commutator, which is in contact with the carbon brushes, tends to be more smooth and uniform, and the phenomenon of poor contact between the commutator and the carbon brushes caused by the formation of an annular groove on the single part on the commutator, which is in contact with the carbon brushes, under long-term friction is avoided.

The above prior art solutions have the following drawbacks:

in the motor operation process, because original manufacturing and assembly error, fixed rotor bearing bears certain radial pressure at the rotor rotation in-process, and the carbon brush forms certain extrusion force between the commutator all the time among the prior art, so make the radial thrust that forms the pivot of rotor, take place the dislocation at commutator axis of rotation direction as two carbon brushes, cause the extrusion force of aggravating the rotor pivot to one side of bearing, cause the bearing wearing and tearing aggravation, lead to final motor life to descend.

Disclosure of Invention

In view of the defects in the prior art, one of the objectives of the present invention is to provide a motor brush assembly, in which a brush body moves up and down synchronously, so as to avoid unbalanced stress on a rotor shaft, reduce wear of a bearing supporting the rotor shaft, and prolong the service life of a motor.

The above object of the present invention is achieved by the following technical solutions:

an electric motor brush assembly comprising

A frame body: the electric brush fixing device comprises a pair of mounting frames for mounting electric brushes and a pair of rod bodies connected between the mounting frames, wherein the rod bodies are perpendicular to the axis of a rotor rotating shaft;

a guide assembly: the guide rod is parallel to the axis of the rotor rotating shaft, and the rod body penetrates through the guide rod in a sliding manner;

a power device: the device comprises a supporting spring sleeved on a guide rod, wherein a driving assembly used for pushing the rod body to compress the supporting spring is arranged on one side, away from the supporting spring, of the rod body.

Through adopting above-mentioned technical scheme, still be provided with a pair of body of rod between the installing frame, the both ends of the body of rod respectively with two installing frame fixed connection, and the middle part of the body of rod adopts horizontal straight-bar, reciprocate in step through controlling two bodies of rod, thereby it reciprocates in step to drive the brush on the installing frame, and then guaranteed that commutator and rotor shaft atress are even, reduce the bearing wearing and tearing that support the rotor pivot, wherein the downside cover that just is located the body of rod on the guide bar is equipped with supporting spring, supporting spring has the trend that promotes the body of rod rebound, the upside at the body of rod still is provided with power device simultaneously, power device has the trend that promotes the body of rod and move down, realize reciprocating of the body of rod through supporting spring and power device's cooperation.

The invention in a preferred example may be further configured to: the active component comprises a cam coaxially arranged on a rotor rotating shaft and power rods symmetrically arranged on two sides of the cam, wherein the power rods are perpendicular to the guide rod and the rotor rotating shaft axis and are two, the power rods are respectively connected with one of the connecting rods, one end of each power rod is in sliding butt joint with the cam, and the power rods are arranged in a sliding mode along the length directions of the power rods.

By adopting the technical scheme, the cam is in an oval shape, one end of the power rod is in sliding butt joint with the cam, the connecting rods are hinged between the two sides of the power rod in the width direction and the rod body, and the upper end of the guide rod is rotatably provided with the guide wheel; when the motor is started, the rotor rotating shaft drives the cam to synchronously rotate, the power rod slides in the horizontal direction due to the rotation of the cam, and the rod body moves in the vertical direction due to the matching of the synchronous connecting rod and the supporting spring, so that the synchronous up-and-down movement of the electric brushes is controlled when the motor is started.

The present invention in a preferred example may be further configured to: the symmetrical both sides that the supporting spring one end was kept away from to the guide bar are rotated and are provided with the leading wheel, the axis of rotation perpendicular to guide bar and rotor pivot axis of leading wheel, set up the guide way on the power rod, the guide bar tip stretches into in the guide way, just the leading wheel rolls the butt with the guide way inner wall.

Through adopting above-mentioned technical scheme, set up the guide way of inlaying the leading wheel at the power pole downside, the upper and lower both sides of leading wheel all can with the inner wall roll butt of guide way, further inject the moving direction of power pole, guaranteed the purpose that the power pole stably drives the body of rod and reciprocate, and then realize that the stability of the brush body reciprocates.

The present invention in a preferred example may be further configured to: the end part of the power rod is rotatably provided with a roller, and the roller is in rolling butt joint with the cam.

Through adopting above-mentioned technical scheme, rotate at the one end of power lever towards the cam and install the gyro wheel, roll the butt between gyro wheel and the cam to the effectual friction resistance that has reduced cam drive power lever and remove and realize producing, and then reduce the loss of motor energy.

The present invention in a preferred example may be further configured to: the outer side of the roller is coaxially provided with an annular groove, and the cam rolls and abuts against the bottom of the annular groove.

Through adopting above-mentioned technical scheme, the ring channel has been seted up to the outside is coaxial in the gyro wheel, is provided with a plurality of balls around the gyro wheel axis interval on the upside inner wall of ring channel, and in the cam part embedding ring channel, the ball rolls the upside in the cam, thereby the moving direction of power rod is injectd in the progress, make the power rod can be stable remove along the horizontal direction, and the ball has effectually reduced the friction pack between gyro wheel and the cam, reduce motor energy loss.

The present invention in a preferred example may be further configured to: the outer side of the cam is coaxially provided with an annular groove, and the roller rolls and abuts against the bottom of the annular groove.

Through adopting above-mentioned technical scheme, the ring channel has been seted up to the outside is coaxial at the cam, is provided with a plurality of balls around the cam axis interval on the downside inner wall of ring channel, and in the gyro wheel part embedding ring channel, the ball rolls and supports in the downside of gyro wheel to the moving direction of power rod is injectd in the progress, makes the power rod can be stable move along the horizontal direction, and ball 81 has effectually reduced the friction pack between gyro wheel and the cam, reduces motor energy loss.

The present invention in a preferred example may be further configured to: and a linear bearing is arranged between the rod body and the guide rod.

Through adopting above-mentioned technical scheme, all be provided with vertical guide bar in the middle part position of two body of rods, the guide bar keeps fixed the setting, and the guide bar runs through the body of rod simultaneously, installs linear bearing between the body of rod and guide bar to make the body of rod can be stable and smooth move along vertical direction, and then drive the removal of brush body in vertical direction.

In summary, the invention includes at least one of the following beneficial technical effects:

1. when the motor is started, the rotor rotating shaft drives the cam to synchronously rotate, the power rod slides in the horizontal direction due to the rotation of the cam, and the rod body moves in the vertical direction due to the cooperation of the synchronous connecting rod and the supporting spring, so that the synchronous up-and-down movement of the electric brush is controlled while the motor is started, the unbalanced stress on the rotor rotating shaft is avoided, the abrasion of a bearing supporting the rotor rotating shaft is reduced, and the service life of the motor is prolonged;

2. the power of the power device is from the rotor, so that other power mechanisms do not need to be arranged outside, the motor has smaller volume compared with the motor in the prior art, and the movement of the electric brush is controlled more stably;

3. the roller or the cam is provided with an annular groove, and the roller is partially embedded into the annular groove or the cam is partially embedded into the annular groove, so that the moving direction of the power rod is further limited, and the two brush bodies are ensured to stably reciprocate up and down;

4. the ball that sets up in the inner wall of ring channel has effectually reduced frictional resistance, and then has guaranteed the output of motor kinetic energy, guarantees the normal removal of the brush body simultaneously, reduces motor energy loss.

Drawings

Fig. 1 is a schematic view of an assembly of a brush assembly of an electric machine.

Fig. 2 is a schematic view of a rod moving structure.

Fig. 3 is a schematic diagram for embodying the structure on the guide bar.

FIG. 4 shows an assembly structure of the roller and the cam according to the first embodiment.

Fig. 5 is an assembly structure of the roller and the cam in the second embodiment.

In the figure, 1, a frame is installed; 2. a rod body; 3. a rotor shaft; 4. a guide bar; 41. a guide wheel; 5. a support spring; 6. a power rod; 61. a guide groove; 62. a roller; 63. a connecting rod; 7. a cam; 8. an annular groove; 81. and a ball.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

For the convenience of understanding, the rotor axis of the motor in the drawings in the application is arranged in a vertical direction, and the orientation description of other components is set forth in the drawings relative to the orientation of the rotor.

As shown in fig. 1-4, a motor brush assembly comprises a pair of mounting frames 1, the fixing structure of the brush in the mounting frames 1 is the same as that of the prior art, and therefore the description is omitted, in addition, a pair of rod bodies 2 are further arranged between the mounting frames 1, two ends of each rod body 2 are respectively fixedly connected with the two mounting frames 1, a horizontal straight rod is adopted in the middle of each rod body 2, the two rod bodies 2 are controlled to synchronously move up and down, so that the brushes on the mounting frames 1 are driven to synchronously move up and down, the uniform stress of a commutator and a rotor rotating shaft 3 is ensured, and the bearing abrasion of the rotor rotating shaft 3 is reduced.

All be provided with vertical guide bar 4 in the middle part position of two body of rod 2, guide bar 4 keeps fixed setting, and guide bar 4 runs through the body of rod 2 simultaneously, installs linear bearing between the body of rod 2 and guide bar 4 to make the body of rod 2 can be stable and move along the vertical direction of smooth edge, and then drive the removal of the brush body in vertical direction.

The lower side cover that just is located the body of rod 2 on guide bar 4 is equipped with supporting spring 5, and supporting spring 5 has the trend that promotes body of rod 2 rebound, still is provided with power device at the upside of the body of rod 2 simultaneously, and power device has the trend that promotes body of rod 2 rebound, realizes reciprocating of the body of rod 2 through supporting spring 5 and power device's cooperation.

The power device comprises a cam 7 coaxially arranged on a rotor rotating shaft 3 and a power rod 6 vertical to a rod body 2 and the rotor rotating shaft 3, wherein the cam 7 is in an elliptical shape, one end of the power rod 6 is in sliding butt joint with the cam 7, a connecting rod 63 is hinged between two sides of the power rod 6 in the width direction and the rod body 2, a guide wheel 41 is rotatably arranged at the upper end of the guide rod 4, a guide groove 61 embedded with the guide wheel 41 is formed in the lower side of the power rod 6, and the upper side and the lower side of the guide wheel 41 can be in rolling butt joint with the inner wall of the guide groove 61;

when the motor is started, the rotor rotating shaft 3 drives the cam 7 to synchronously rotate, the power rod 6 slides in the horizontal direction due to the rotation of the cam 7, and the rod body 2 moves in the vertical direction due to the matching of the synchronous connecting rod 63 and the supporting spring 5, so that the synchronous up-and-down movement of the electric brushes is controlled when the motor is started.

The roller 62 is rotatably mounted at one end of the power rod 6 facing the cam 7, and the roller 62 is in rolling contact with the cam 7, so that the friction resistance generated by driving the power rod 6 to move by the cam 7 is effectively reduced, and the energy loss of the motor is further reduced. And the outer side of the cam 7 is coaxially provided with the annular groove 8, a plurality of balls 81 are arranged on the inner wall of the lower side of the annular groove 8 at intervals around the axis of the cam 7, the roller 62 is partially embedded into the annular groove 8, and the balls 81 are supported on the lower side of the roller 62 in a rolling manner, so that the moving direction of the power rod 6 is further limited, the power rod 6 can stably move along the horizontal direction, the balls 81 effectively reduce friction components between the roller 62 and the cam 7, and the energy loss of a motor is reduced.

The implementation principle of the embodiment is as follows:

when the motor is started, the rotor rotating shaft 3 simultaneously drives the cam 7 to rotate, the roller 62 and the cam 7 are always kept in a butt joint state, so that the power rod 6 is driven to move, the rod body 2 is vertically moved in a matching mode through the connecting rod 63 and the supporting spring 5, and the brush body is synchronously moved up and down.

Example two:

the difference from the first embodiment is that:

referring to fig. 5, an annular groove 8 is coaxially formed in the outer side of the roller 62, a plurality of balls 81 are arranged on the inner wall of the upper side of the annular groove 8 at intervals around the axis of the roller 62, the cam 7 is partially embedded into the annular groove 8, the balls 81 roll and abut against the upper side of the cam 7, so that the moving direction of the power rod 6 is further limited, the power rod 6 can stably move in the horizontal direction, the balls 81 effectively reduce friction components between the roller 62 and the cam 7, and the energy loss of a motor is reduced.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. An electric motor brush subassembly which characterized in that: comprises that

A frame body: the electric brush fixing device comprises a pair of mounting frames (1) for mounting electric brushes and a pair of rod bodies (2) connected between the mounting frames (1), wherein the rod bodies (2) are arranged perpendicular to the axis of a rotor rotating shaft (3);

the guiding component comprises: the device comprises a pair of guide rods (4) parallel to the axis of a rotor rotating shaft, wherein the rod body (2) penetrates through the guide rods (4) in a sliding manner;

a power device: support spring (5) on guide bar (4) are located including the cover, one side that support spring (5) were kept away from in the body of rod (2) is provided with the initiative subassembly that is used for promoting the body of rod (2) compression support spring (5).

2. An electric motor brush assembly as defined in claim 1, wherein: the active component comprises a cam (7) coaxially arranged on a rotor rotating shaft (3) and power rods (6) symmetrically arranged on two sides of the cam (7), the power rods (6) are perpendicular to the guide rods (4) and the rotor rotating shaft (3) in an axial line, the two power rods (6) are respectively connected with one of the power rods (6) through connecting rods (63), one ends of the power rods (6) are abutted to the cam (7) in a sliding mode, and the power rods (6) are arranged in a sliding mode along the length direction of the power rods.

3. An electric motor brush assembly as defined in claim 2, wherein: the symmetrical both sides that supporting spring (5) one end was kept away from in guide bar (4) are rotated and are provided with leading wheel (41), the axis of rotation perpendicular to guide bar (4) and rotor pivot (3) axis of leading wheel (41), set up guide way (61) on power rod (6), guide bar (4) tip stretches into in guide way (61), just leading wheel (41) and guide way (61) inner wall roll butt.

4. An electric motor brush assembly as set forth in claim 2, wherein: the end part of the power rod (6) is rotatably provided with a roller (62), and the roller (62) is in rolling contact with the cam (7).

5. An electric motor brush assembly as set forth in claim 4, wherein: an annular groove (8) is coaxially formed in the outer side of the roller (62), and the cam (7) is in rolling contact with the bottom of the annular groove (8).

6. An electric motor brush assembly as set forth in claim 4, wherein: an annular groove (8) is coaxially formed in the outer side of the cam (7), and the roller (62) is in rolling contact with the bottom of the annular groove (8).

7. An electric motor brush assembly as defined in claim 2, wherein: and a linear bearing is arranged between the rod body (2) and the guide rod (4).