CN220553680U - Brush, motor, power assembly and vehicle - Google Patents

Abstract

The application provides a brush, motor, power assembly and vehicle, the brush includes brush mounting, brush hair fixing base and elastic component, and the brush mounting is including acceping the recess, and acceping the recess and be used for holding brush hair fixing base and elastic component, and the brush hair includes along the relative one end and the other end of arranging of first direction, and the brush hair fixing base is used for fixing the one end of brush hair, and the other end of brush hair is located acceping the recess outward, acceping the recess and including acceping the tank bottom. The other end of the brush hair, the brush hair fixing seat, the elastic piece and the containing groove bottom are sequentially arranged along the first direction, and the elastic piece is used for pushing the brush hair fixing seat to move away from the containing groove bottom along the first direction. One of the brush holder and bristles is for contact with the motor shaft and the other of the brush holder and bristles is for contact with the motor end cap. Under the action of the elastic piece, the electric brush can be reliably contacted with the motor shaft and the motor end cover, so that the electric brush can normally release the shaft current of the motor shaft.

Description

Brush, motor, power assembly and vehicle

Technical Field

The application relates to the technical field of motors, in particular to an electric brush, a motor, a power assembly and a vehicle.

Background

During operation of the motor, the motor shaft accumulates charge that creates a shaft current on the motor shaft. Shaft current flows through the motor shaft to a motor bearing for supporting the motor shaft. The motor bearing is easy to be damaged by the shaft current, so that the motor bearing is electrically corroded, the motor bearing is invalid, and the safe and reliable operation of the motor is seriously endangered. Meanwhile, damage to the motor bearing in the running process of the motor can be aggravated after the motor bearing is electrically corroded, so that noise is generated in the motor bearing.

Disclosure of Invention

The application provides an electric brush, a motor, a power assembly and a vehicle.

In a first aspect, the present application provides a brush, the brush includes brush holder, brush hair fixing base and elastic component, the brush holder includes the accommodating groove, the accommodating groove is used for holding the brush hair fixing base with the elastic component, the brush hair includes along the relative one end and the other end of arranging of first direction, the brush hair fixing base is used for fixing the one end of brush hair, the other end of brush hair is located outside the accommodating groove, the accommodating groove includes the accommodating groove bottom. The other ends of the bristles, the bristle fixing seats, the elastic pieces and the containing groove bottoms are sequentially arranged along the first direction, and the elastic pieces are used for pushing the bristle fixing seats to move away from the containing groove bottoms along the first direction.

In this embodiment of the application, the brush is used for connecting motor shaft and motor end cover, thereby epaxial axle current of motor can be through the brush conduction to motor end cover release axle current to prevent that motor bearing from being corroded by the electricity, improved motor bearing's life. In addition, the electric brush comprises an elastic piece, and as the two ends of the electric brush along the first direction are respectively used for contacting the motor shaft and the motor end cover, the elastic force of the elastic piece along the first direction enables the two ends of the electric brush along the first direction to contact the motor shaft and the motor end cover with pressure equalizing force, so that the contact reliability of the electric brush and the motor shaft and the motor end cover is improved. And when the brush hair is worn, under the action of the pretightening force release of the elastic piece, the brush hair fixing seat drives the brush hair to deviate from the bottom of the accommodating groove to move, so that the reliable contact between the brush and the motor shaft and between the brush hair and the motor end cover is ensured, the shaft current of the motor shaft can be normally released by the brush hair, the service life of the motor bearing is prolonged, and the safe and reliable operation of the motor is ensured.

In one embodiment, the brush further comprises a bristle guide plate, the bristle guide plate and the brush holder are arranged along the first direction and are fixed to each other, the bristle guide plate, the bristle holder and the elastic member are arranged along the first direction in sequence, the bristle guide plate comprises a through hole, the through hole penetrates through the bristle guide plate along the first direction, and the through hole is used for accommodating part of the bristles.

In this embodiment of the application, through setting up the acceptation notch that the brush hair deflector is used for sealing acceptation recess, parts such as brush hair fixing base, elastic component limit are located the brush and accept the intracavity for the position of each part is comparatively regular in the brush, and the brush of being convenient for normally, stable work. And the bristle fixing seat moves between the containing groove bottom and the bristle guide plate along the first direction, so that the movement length of the bristle fixing seat is limited, the elastic piece is ensured to have enough elasticity to ensure that the electric brush is reliably contacted with the motor shaft and the motor end cover, the service life of the motor bearing is prolonged, and the safe and reliable operation of the motor is ensured. In addition, whether the electric brush works normally or not can be judged through the relative position relation between the bristle fixing seat and the bristle guide plate, so that the contact reliability of the electric brush, a motor shaft and a motor end cover is improved. Illustratively, the distance between the bristle holder and the bristle guide plate is reduced until the bristle holder engages the bristle guide plate, after which the bristle holder cannot continue to move closer to the bristle guide plate, at which time the brushes can be replaced to ensure the reliability of the contact of the brushes with the motor shaft and motor end cap.

In one embodiment, along the first direction, a projection of the through hole is located within a projection of the bristle holder. Along the first direction, the projection of the bristle guide plate covers the accommodating groove.

In this embodiment of the application, because the area of through-hole is less than the area of brush hair fixing base makes the brush hair fixing base can be located between acceping tank bottom and the brush hair deflector along first direction limit for the position of each part in the brush is comparatively regular, and the brush of being convenient for normally, stable work, thereby guarantees the better release of the axle current of motor shaft, has improved motor bearing's life, has guaranteed the safe and reliable operation of motor. And the projection of through-hole along the first direction is located the bristle fixing base for the brush hair can be fixed in the bristle fixing base along first direction and follow the through-hole and stretch out to the accommodating groove outside along first direction, has reduced the buckling of brush hair, improves the life of brush hair. In addition, the area of the bristle guide plate is larger, so that the accommodating notch of the accommodating groove can be better closed, and the bristle fixing seat and the elastic piece can be better limited in the accommodating groove.

In one embodiment, the bristle guide plate comprises a plurality of said through holes, the brush comprises a plurality of bundles of said bristles, each bundle of said bristles comprising at least one of said bristles, at least one of said plurality of through holes being adapted to receive at least one bundle of said bristles.

In an embodiment of the present application, the brush includes a plurality of bristles, and the other end of each bristle of the plurality of bristles is configured to contact the motor shaft or the motor end cap. When part of the bristles are broken, the rest of the bristles can work normally as brushes, so that the contact reliability of the bristles and a motor shaft or a motor end cover is improved, the better release of the shaft current of the motor shaft is ensured, the service life of a motor bearing is prolonged, and the safe and reliable operation of the motor is ensured. And when each bundle of bristles comprises a plurality of bristles, compared with one bristle, the strength of one bundle of bristles is higher, and the bristles are not easy to break, so that the normal and stable operation of the electric brush is ensured. In addition, the through holes are used for accommodating at least one bundle of bristles, and can play roles in guiding the movement of the bristles and supporting the bristles.

In one embodiment, the brush further comprises a first guide structure and a second guide structure, the first guide structure and the second guide structure being relatively slidable in the first direction. The first guide structure is fixed on the side wall of the accommodating groove, the second guide structure is fixed on the periphery of the bristle fixing seat, one of the first guide structure and the second guide structure is a groove, and the other of the first guide structure and the second guide structure is a bump; or one of the first guide structure and the second guide structure is a sliding rail, and the other of the first guide structure and the second guide structure is a pulley.

In this embodiment of the application, through first guide structure and second guide structure matched with, realize the lateral wall sliding connection of brush hair fixing base and accommodating groove. The bristle holder is movable along a predetermined path. When the bristle fixing seat moves relative to the side wall of the accommodating groove, the friction force between the bristle fixing seat and the side wall of the accommodating groove is reduced. The elastic piece pushes the bristle fixing seat to move more smoothly, and reliable contact between the electric brush and the motor shaft and between the electric brush and the motor end cover are guaranteed.

In one embodiment, the brush further comprises a positioning column, the positioning column is fixed on the bristle fixing base, and the bristle fixing base, the positioning column and the containing groove bottom are sequentially arranged along the first direction. The elastic piece comprises a spring, the spring is sleeved on the positioning column, and two ends of the spring along the first direction are respectively contacted with the bristle fixing seat and the containing groove bottom.

In this application embodiment, the reference column can play the positioning action to the spring for the position of spring is fixed relatively, and the spring of being convenient for promotes brush hair fixing base and brush hair motion along first direction. The reliability of the contact between the electric brush and the motor shaft and the motor end cover is improved. On the other hand, the locating column protrudes from the bristle fixing seat towards the containing groove bottom along the first direction, and the locating column can prevent the bristle fixing seat and the containing groove bottom from being excessively close to each other, so that the spring is excessively compressed to be damaged. The reference column can play the effect of protection spring in this application embodiment.

In a second aspect, the present application provides a motor comprising a motor end cap, a motor shaft and brushes as described above, the motor shaft and the motor end cap being aligned in a first direction, the first direction being parallel to the motor shaft axis, one of the brush holder and the bristles being in contact with the motor shaft, the other of the brush holder and the bristles being in contact with the motor end cap. The shaft current on the motor shaft can be conducted to the motor end cover through the electric brush so as to release the shaft current, so that the motor bearing is prevented from being corroded electrically, the service life of the motor bearing is prolonged, and the safe and reliable operation of the motor is ensured. And noise generated by damage of the motor bearing is reduced, and riding comfort of the electric vehicle is improved.

In one embodiment, the motor shaft includes a motor shaft cavity extending through the motor shaft in the first direction toward an end face of the motor end cap, the motor shaft cavity for receiving the brush fixture, the brush fixture in contact with an inner wall of the motor shaft cavity. The motor end cover, the other ends of the bristles and the containing groove bottoms are sequentially arranged along the first direction, and the other ends of the bristles are in contact with the motor end cover.

In an embodiment of the present application, the motor shaft includes a motor shaft cavity for receiving at least a portion of the brush. The brush fixing piece of the brush is contacted with the inner wall of the motor shaft cavity, the other end of the brush hair is contacted with the motor end cover, and the space in the motor shaft cavity of the motor shaft is fully utilized. In this application embodiment, through installing the brush in the motor shaft intracavity of motor shaft, the brush need not additionally occupy the space of motor shaft along first direction or the space reduction along first direction of the motor shaft that the brush occupy, has reduced the size of motor along first direction, is favorable to the miniaturization of power assembly volume. The power assembly is compact and integrated, so that the power assembly is convenient to arrange and install in the whole vehicle, the power assembly can save the space occupied by the electric vehicle, and other functional components can be conveniently arranged and installed in the electric vehicle, so that the overall performance of the electric vehicle is improved.

In a third aspect, the present application provides a powertrain, the powertrain comprising a reducer and a motor as described above, the motor shaft being fixedly connected to a reducer input shaft of the reducer, the motor end cap, the brush and the reducer input shaft being arranged in sequence along the first direction.

In a fourth aspect, the present application provides an electric vehicle comprising a vehicle body, wheels and an electric machine as described above or a powertrain as described above for driving the wheels, the vehicle body being for securing the electric machine or the powertrain.

Drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

FIG. 1 is a schematic illustration of an electric vehicle according to an embodiment of the present disclosure;

FIG. 2 is a schematic illustration of a powertrain according to an embodiment of the present disclosure;

FIG. 3 is a perspective view of a powertrain provided in an embodiment of the present application;

FIG. 4 is a perspective view of a powertrain provided in an embodiment of the present application;

FIG. 5 is a cross-sectional view of a powertrain according to one embodiment of the present disclosure;

FIG. 6 is a perspective view of a brush provided in an embodiment of the present application;

FIG. 7 is an exploded view of a brush provided in an embodiment of the present application;

FIG. 8 is a cross-sectional view of a brush according to one embodiment of the present disclosure;

FIG. 9 is a cross-sectional view of a brush according to one embodiment of the present application;

FIG. 10 is a cross-sectional view of a brush holder and bristle holder according to one embodiment of the present application;

FIG. 11 is a cross-sectional view of a brush according to an embodiment of the present application;

FIG. 12 is an exploded view of an axial cover plate, axial seal, motor end cap and bearing retainer provided in an embodiment of the present application;

FIG. 13 is a perspective view of a motor according to an embodiment of the present application;

fig. 14 is a cross-sectional view of a motor provided in an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.

The terms "first," "second," and the like herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

Furthermore, herein, the terms "upper," "lower," and the like, are defined with respect to the orientation in which the structure is schematically disposed in the drawings, and it should be understood that these directional terms are relative concepts, which are used for descriptive and clarity with respect thereto and which may be varied accordingly with respect to the orientation in which the structure is disposed.

For convenience of understanding, the following description will explain and describe english abbreviations and related technical terms related to the embodiments of the present application.

Parallel: the parallelism defined in the embodiments of the present application is not limited to absolute parallelism, and the definition of parallelism is understood to be substantially parallel, allowing for non-absolute parallelism due to factors such as assembly tolerances, design tolerances, structural flatness, etc.

And (3) vertical: the vertical defined in the embodiments of the present application is not limited to an absolute vertical intersection (the included angle is 90 degrees), and may be understood as a vertical relationship when a small angle range of error, for example, an assembly error range ranging from 80 degrees to 100 degrees, is allowed in a relation other than an absolute vertical intersection due to factors such as assembly tolerance, design tolerance, and structural flatness.

The motor 10 is capable of converting electrical energy into mechanical energy to power industrial drives, automation equipment, fans, pumps, compressors, machine tools, robots, vehicles, and the like. The vehicles may include on-road vehicles, air vehicles, water vehicles, industrial equipment, agricultural equipment, entertainment equipment, or the like. Illustratively, the watercraft may be a hovercraft, a motorboat, a fishing boat, a cruise boat, a sailboat, a yacht, or the like. The air vehicle may be an aircraft, the on-road vehicle may be a fuel vehicle, an electric vehicle 1, or the like. The motor 10 provided by the application can be applied to various fields of aviation, national defense, industrial and agricultural production, daily life and the like.

Referring to fig. 1, fig. 1 is a schematic diagram of an electric vehicle 1 according to an embodiment of the present application. The electric vehicle 1 includes a vehicle body 11 and a powertrain 2. The powertrain 2 includes an electric motor 10 (refer to fig. 2). The powertrain 2 is fixed to the vehicle body 11, and the powertrain 2 is capable of driving the wheels 12 to rotate to power the electric vehicle 1.

The electric vehicle 1 includes two-wheeled, three-wheeled or four-wheeled vehicles. The electric vehicle 1 may be one of a pure electric vehicle (Pure Electric Vehicle/Battery Electric Vehicle, PEV/BEV), a hybrid vehicle (Hybrid Electric Vehicle, HEV), an extended range electric vehicle (Range Extended Electric Vehicle, REEV), a Plug-in hybrid vehicle (Plug-in Hybrid Electric Vehicle, PHEV), a new energy vehicle (New Energy Vehicle). In one embodiment, the electric vehicle 1 is a vehicle. The electric vehicle 1 is illustratively one of a commercial vehicle, a passenger vehicle, a motorcycle, an aerocar, and a train. In one embodiment, the electric vehicle 1 is an industrial vehicle or an engineering vehicle. The electric vehicle 1 is illustratively one of a forklift, a trailer, a tractor, an excavator, a bulldozer, and a crane. In one embodiment, the vehicle may be an electric vehicle or a fuel-powered vehicle. In an embodiment, the electric vehicle 1 may also be an agricultural device (e.g., a mower, a harvester, etc.), an amusement device, a toy vehicle, etc.

In an embodiment, the electric vehicle 1 may include one or more subassemblies 2.

Referring to fig. 2, fig. 2 is a schematic diagram of a powertrain 2 according to an embodiment of the present disclosure. The present application provides a powertrain 2, the powertrain 2 comprising a reduction gear 21 and a motor 10. The decelerator 21 includes a decelerator input shaft 22. The motor 10 includes a motor shaft 200. The motor shaft 200 is fixedly connected with the decelerator input shaft 22, and the motor shaft 200 is used to transmit power to the decelerator input shaft 22. Wherein the axial direction of the reducer input shaft 22 is parallel to the axial direction of the motor shaft 200. The speed reducer 21 is capable of changing the transmission ratio between the motor 10 and the wheels 12. The speed reducer 21 may include a single speed reduction gear assembly, a two or more speed reduction gear assembly. Rotation of motor shaft 200 may rotate reducer input shaft 22 such that power output by motor 10 is transmitted to reducer input shaft 22.

In one embodiment, powertrain 2 further includes a wheel drive half shaft 23 and a differential 24 (shown in FIG. 2). The wheel drive axle shafts 23 are fixedly coupled to the wheels 12. The speed reducer 21 receives power transmitted from the motor shaft 200 through the speed reducer input shaft 22 and transmits the power to the wheel drive half shafts 23 through the differential 24 to drive the wheels 12 to rotate. Wherein the differential 24 enables the left and right (or front and rear) wheels to rotate at different rotational speeds.

In one embodiment, motor shaft 200 may be the same shaft as reducer input shaft 22.

In one embodiment, powertrain 2 may include one motor 10, and as an example, powertrain 2 may be a three-in-one single motor assembly (as shown in FIG. 3). In one embodiment, powertrain 2 may include a plurality of motors 10, and as an example, powertrain 2 may be a distributed dual motor assembly (as shown in FIG. 4).

In one embodiment, the motor 10 includes a motor shaft 200, a motor rotor 510, and a motor stator 520 (as shown in fig. 5), wherein the motor rotor 510 is sleeved and fixed on the outer surface of the motor shaft 200. The motor stator 520 is sleeved on the motor rotor 510 and is arranged at intervals with the outer surface of the motor rotor 510. The motor stator 520 includes stator windings 521, and a rotating magnetic field generated upon energizing the stator windings 521 interacts with permanent magnets on the motor rotor 510. The electromagnetic field causes the motor rotor 510 to rotate, thereby rotating the motor shaft 200.

In one embodiment, the electric vehicle 1 further includes a battery pack 3 (shown in fig. 1), and the powertrain 2 further includes a motor controller 4 (shown in fig. 3). The motor controller 4 is connected to the battery pack 3 and the stator winding 521 of the motor 10, and the motor controller 4 is configured to receive the direct current output by the battery pack 3, convert the direct current output by the battery pack 3 into an alternating current, and transmit the alternating current to the stator winding 521 to drive the motor shaft 200 of the motor 10 to rotate.

During operation of the motor, shaft current is formed on motor shaft 200. Shaft current flows through the motor shaft 200 to the motor bearing 400 for supporting the motor shaft 200, and the shaft current may damage the motor bearing 400, causing the motor bearing 400 to be electrically corroded, causing the motor bearing 400 to fail, seriously jeopardizing the safe and reliable operation of the motor 10. Meanwhile, after the motor bearing 400 is electrically corroded, damage to the motor bearing 400 in the running process of the motor 10 is aggravated, so that noise is generated by the motor bearing 400, and riding comfort of the whole vehicle is affected. The motor 10 provided by the application comprises the electric brush 100, the electric brush 100 is electrically connected with the motor shaft 200 and the motor end cover 300, and shaft current formed on the motor shaft 200 can be conducted to the motor end cover 300 through the electric brush 100 so as to release the shaft current, so that the motor bearing 400 for supporting the motor shaft 200 is prevented from being corroded electrically, and the service life of the motor bearing 400 is prolonged.

The motor 10 of the present application is described in detail below.

Referring to fig. 5, 6, 7 and 8, fig. 5 is a cross-sectional view of a powertrain 2 according to an embodiment of the present disclosure. Fig. 6 is a perspective view of a brush 100 according to an embodiment of the present application. Fig. 7 is an exploded view of a brush 100 according to an embodiment of the present application. Fig. 8 is a cross-sectional view of a brush 100 according to an embodiment of the present application.

The present application provides a motor 10, the motor 10 includes a motor end cover 300, a motor shaft 200, and a brush 100, the motor shaft 200 and the motor end cover 300 are arranged along a first direction X (as shown in fig. 5), and the first direction X is parallel to an axial direction of the motor shaft 200. The brush 100 includes a brush holder 110, bristles 120, a bristle holder 130, and an elastic member 140 (shown in fig. 6, 7, and 8). The brush holder 110 includes a receiving recess 111 for receiving the bristle holder 130 and the elastic member 140, and the bristles 120 include one end 121 and the other end 122 arranged opposite to each other in the first direction X. The bristle holder 130 is used to hold one end 121 of the bristles 120, and the other end 122 of the bristles 120 is located outside the receiving recess 111. The receiving recess 111 includes a receiving recess bottom 112. The other end 122 of the bristle 120, the bristle holder 130, the elastic member 140, and the accommodating groove bottom 112 are sequentially arranged along the first direction X, and the elastic member 140 is used for pushing the bristle holder 130 to move away from the accommodating groove bottom 112 along the first direction X. One of the brush holder 110 and the brush 120 contacts the motor shaft 200, and the other of the brush holder 110 and the brush 120 contacts the motor end cap 300.

Wherein the motor shaft 200 is rotatably coupled to the motor end cap 300 via a motor bearing 400 (shown in fig. 5). The motor bearing 400 serves to support the motor shaft 200, guide the rotation of the motor shaft 200, and the motor bearing 400 can serve to bear a load transmitted from the motor shaft 200 to the motor cover 300. The motor bearing 400 may reduce friction between the motor end cap 300 and the motor shaft 200, and make the rotation of the motor shaft 200 smoother, thereby reducing power consumption.

The brush 100 connects the motor shaft 200 and the motor end cap 300 (as shown in fig. 5), and shaft current on the motor shaft 200 can be conducted to the motor end cap 300 through the brush 100 to release the shaft current, so that the motor bearing 400 is prevented from being electrically corroded, and the service life of the motor bearing 400 is improved.

In the brush 100, the brush holder 110 further includes a receiving slot, which is disposed opposite to the receiving slot bottom 112 along the first direction X. The bristle holder 130 and the elastic member 140 may be mounted in the receiving groove 111 from the receiving notch.

The bristles 120 extend in a first direction X. One end 121 of the bristle 120 is positioned within the receiving recess 111 (as shown in fig. 8), and the other end 122 of the bristle 120 extends from the receiving slot to the outside of the receiving recess 111. One end 121 of the bristle 120 is fixed to the bristle holder 130, and the bristle holder 130 can drive the bristle 120 to move when moving in the first direction X.

The bristle holder 130 intersects the first direction X. In the first direction X, the bristle holder 130 is movable relative to the wall of the receiving recess 111 to vary the length of the brush 100 in the first direction X. The length of the brush 100 in the first direction X is also the distance between the other end 122 of the bristle 120 and the receiving groove bottom 112. In one embodiment, the bristle holder 130 is perpendicular to the first direction X such that the bristle holder 130 has a larger area for holding more bristles 120. In one embodiment, the outer circumferential surface of the bristle holder 130 contacts the groove wall of the receiving groove 111 such that the bristle holder 130 is relatively fixed in a direction perpendicular to the first direction X.

In one embodiment, one end 121 of the bristle 120 is fixed to an end surface of the bristle holder 130 facing away from the receiving groove bottom 112 in the first direction X. In an embodiment, the bristle holder 130 includes a through hole, the through hole penetrates the bristle holder 130 along the first direction X, and the bristles 120 are disposed in the through hole and fixed in a wall of the through hole (as shown in fig. 8).

In one embodiment, the brush 100 includes a plurality of bristles 120 (as shown in FIG. 8), each of the plurality of bristles 120 being secured to a bristle holder 130. When the elastic member 140 pushes the bristle fixing base 130, the plurality of bristles 120 can be pushed to move together, so that the convenience of pushing the plurality of bristles 120 to move is improved, and the reliability of connecting the motor shaft 200 and the motor end cover 300 with the electric brush 100 is ensured.

The elastic member 140 has elasticity, and the elastic member 140 is located between the bristle holder 130 and the accommodating groove bottom 112. When the brush 100 is operated, the elastic member 140 is compressed by the bristle holder 130 and the receiving groove bottom 112, and the elastic member 140 is in a pre-tensioned state. The elastic member 140 can generate an elastic force along the first direction X to push the bristle holder 130 to move away from the accommodating groove bottom 112, so that the bristle holder 130 drives the bristles 120 to move away from the accommodating groove bottom 112.

In an embodiment, two ends of the elastic member 140 along the first direction X are fixed to the bristle fixing base 130 and the accommodating groove bottom 112, respectively, and the positions of the elastic member 140 are relatively fixed, so that the bristle fixing base 130 can be better pushed to move. In one embodiment, one end of the elastic member 140 is fixed to the bristle holder 130 along the first direction X, and the other end of the elastic member 140 abuts against the accommodating groove bottom 112. In one embodiment, one end of the elastic member 140 is fixed to the accommodating groove bottom 112 along the first direction X, and the other end of the elastic member 140 abuts against the bristle fixing base 130. In an embodiment, two ends of the elastic member 140 along the first direction X respectively abut against the bristle fixing base 130 and the accommodating groove bottom 112.

In one embodiment, the brush holder 110 is in contact with the motor shaft 200 and the other end 122 of the brush hair 120 is in contact with the motor end cap 300. The brush holder 110 is interference fit with the motor shaft 200, and the bristles 120 are in pressure contact with the motor end cap 300. The other ends 122 of the bristles 120 are elastically coupled to the motor cover 300. When the other end 122 of the bristle 120 wears, the bristle holder 130 drives the other end 122 of the bristle 120 to approach the motor end cover 300 under the action of the elastic member 140, so as to ensure reliable contact between the bristle 120 and the motor end cover 300. In this embodiment, the brush fixing member 110 and the other end 122 of the brush 120 are respectively in contact with the motor shaft 200 and the motor end cover 300, and since the weight of the end of the brush 100 away from the motor end cover 300 is greater than that of the end of the brush 100 close to the motor end cover 300, when the motor end cover 300 is detached, the position of the brush 100 is relatively fixed, as in the embodiment shown in fig. 5, the brush 100 can be well contained in the motor shaft 200. When the motor 10 is assembled, the electric brush 100 is placed in the motor shaft 200, so that the position of the electric brush 100 is relatively fixed, and the convenience of the motor 10 in the assembly and disassembly process is improved.

In one embodiment, the brush holder 110 is in contact with the motor end cap 300 and the other end 122 of the brush hair 120 is in contact with the motor shaft 200. The other end 122 of the bristle 120 is elastically coupled to the motor shaft 200. When the other end 122 of the bristle 120 is worn, the bristle holder 130 drives the other end 122 of the bristle 120 to approach the motor shaft 200 under the action of the elastic member 140, so as to ensure reliable contact between the bristle 120 and the motor shaft 200. Generally, the hardness of the bristles 120 is less than that of the bristle holder 130, and in the present embodiment, the bristles 120 are used to contact the motor shaft 200, so that wear of the motor shaft 200 can be reduced.

In the motor 10 provided in this embodiment of the present application, on the one hand, the motor 10 includes the brush 100, the brush 100 is electrically connected with the motor shaft 200 and the motor end cover 300 (as shown in fig. 5), and the brush 100 can be used for releasing the shaft current of the motor shaft 200, so as to prevent the motor bearing 400 from being corroded electrically, improve the service life of the motor bearing 400, and ensure the safe and reliable operation of the motor 10. And also reduces noise generated due to damage to the motor bearing 400, improving riding comfort of the electric vehicle 1.

On the other hand, the brush 100 includes the elastic member 140, since both ends of the brush 100 in the first direction X are respectively used to contact the motor shaft 200 and the motor end cover 300 (as shown in fig. 5 and 8), by the arrangement of the elastic member 140, the elastic force of the elastic member 140 in the first direction X makes both ends of the brush 100 in the first direction X in pressure-equalizing contact with the motor shaft 200 and the motor end cover 300, and the reliability of the contact of the brush 100 with the motor shaft 200 and the motor end cover 300 is improved. And when the brush hair 120 is worn, under the action of the pretightening force release of the elastic piece 140, the brush hair fixing seat 130 drives the brush hair 120 to move away from the containing groove bottom 112, so that reliable contact between the electric brush 100 and the motor shaft 200 and reliable contact between the electric brush 100 and the motor end cover 300 are ensured, the shaft current of the motor shaft 200 can be normally released by the electric brush 100, the service life of the motor bearing 400 is prolonged, and safe and reliable operation of the motor 10 is ensured.

In one embodiment, the brush 100 is detachably connected to both the motor shaft 200 and the motor end cap 300, facilitating replacement of the brush 100.

In one embodiment, the brush fixture 110 is fixedly coupled to one of the motor shaft 200 and the motor end cap 300, and the other end 122 of the brush hair 120 is in contact with the other of the motor shaft 200 and the motor end cap 300. Illustratively, the brush holder 110 is fixedly coupled to the motor shaft 200, and the other end 122 of the brush hair 120 is in contact with the motor end cap 300. In the embodiment of the application, the brush fixing member 110 is relatively fixed with the motor shaft 200 or the motor end cover 300, so that the position of the brush 100 is relatively fixed, and the contact reliability of the brush 100 with the motor shaft 200 and the motor end cover 300 is improved.

In one embodiment, the bristles 120 have a stiffness less than the stiffness of the brush holder 110 and less than the stiffness of the motor end cap 300 and motor shaft 200. In operation, the brush 100 is worn by the bristles 120 to reduce wear of the motor end cap 300 or motor shaft 200 in contact with the bristles 120. And the worn bristles 120 can be reliably connected with the motor end cover 300 or the motor shaft 200 by the elastic member 140. In this embodiment of the present application, not only the motor end cover 300 and the motor shaft 200 can be protected, but also the reliable contact between the brush 100 and the motor shaft 200 and the motor end cover 300 can be ensured, the service life of the motor bearing 400 is prolonged, and the safe and reliable operation of the motor 10 is ensured.

Referring to fig. 5, in one embodiment, the motor shaft 200 includes a motor shaft cavity 210, the motor shaft cavity 210 extends through the motor shaft 200 in a first direction X toward an end face of the motor end cap 300, the motor shaft cavity 210 is configured to receive the brush fixture 110, and the brush fixture 110 contacts an inner wall of the motor shaft cavity 210. In the first direction X, the motor cover 300, the other ends 122 of the bristles 120, and the receiving groove bottoms 112 are sequentially arranged, and the other ends 122 of the bristles 120 are in contact with the motor cover 300 (see fig. 8).

The motor shaft 200 includes one end face and the other end face disposed opposite to each other along the first direction X, and one end face is an end face of the motor shaft 200 facing the motor end cover 300 along the first direction X. The motor shaft cavity 210 penetrates an end surface along a first direction X. The brush 100 can be mounted into the motor shaft cavity 210 from an end face in a first direction X. The shaft current of the motor shaft 200 is sequentially transmitted to the motor cover 300 through the brush holder 110, the bristle holder 130, and the bristles 120. Or the shaft current of the motor shaft 200 is sequentially transmitted to the motor end cap 300 through the brush holder 110, the elastic member 140, the bristle holder 130, and the bristles 120.

In one embodiment, the depth of the motor shaft cavity 210 is greater than or equal to the length of the brush 100 along the first direction X. The brush 100 may be entirely contained within the motor shaft cavity 210. In one embodiment, the depth of the motor shaft cavity 210 is less than the length of the brush 100. The brush 100 is partially housed in the motor shaft cavity 210. The other end 122 of the bristle 120 is located outside the motor shaft cavity 210. In one embodiment, the length of the brush 100 located within the motor shaft cavity 210 is greater than or equal to half of the total length of the brush 100 along the first direction X.

In the motor 10 provided in the embodiment of the present application, the motor shaft 200 includes a motor shaft cavity 210 for accommodating at least part of the brush 100. The brush holder 110 of the brush 100 contacts the inner wall of the motor shaft cavity 210 (as shown in fig. 5), and the other end 122 of the brush 120 contacts the motor end cap 300, making full use of the space in the motor shaft cavity 210 of the motor shaft 200. Compared to the embodiment in which the brush 100 is located between the motor end cover 300 and an end face of the motor shaft 200, in the embodiment of the present application, by installing the brush 100 in the motor shaft cavity 210 of the motor shaft 200, the brush 100 does not need to occupy the space of the motor shaft 200 along the first direction X or the space of the motor shaft 200 occupied by the brush 100 along the first direction X is reduced, which reduces the size of the motor 10 along the first direction X and is beneficial to the miniaturization of the volume of the power assembly 2. The power assembly 2 is compactly integrated, so that the power assembly 2 is conveniently arranged and installed on the whole vehicle, the power assembly 2 can save space occupied by the electric vehicle 1, and other functional components are conveniently arranged and installed on the electric vehicle 1, so that the overall performance of the electric vehicle 1 is improved.

In one embodiment, the brush holder 110 and the receiving recess 111 are each cylindrical (as shown in fig. 7). The bristle holder 130 and the receiving groove bottom 112 are both circular. Along the first direction X, the projection of the bristle holder 130 overlaps the projection of the receiving slot bottom 112. Wherein the brush holder 110 is cylindrically shaped to facilitate the installation of the brush 100 within the motor shaft cavity 210 of the motor shaft 200. The accommodating groove 111 is cylindrical, and the circumferential sides of the round bristle fixing base 130 can be in contact with the side walls of the accommodating groove 111, so that the bristle fixing base 130 can be fixed in the accommodating groove 111 along the radial direction of the bristle fixing base 130. So that the elastic member 140 can better push the bristle holder 130 to move, ensure reliable contact between the brush 100 and the motor shaft 200 and the motor end cover 300, improve the service life of the motor bearing 400, and ensure safe and reliable operation of the motor 10. In addition, the area of the bristle holder 130 is large, and more bristles 120 can be fixed on the bristle holder 130. The other ends 122 of the plurality of bristles 120 are used to contact the motor shaft 200 or the motor end cap 300, improving the reliability of the contact of the brush 100 with the motor shaft 200 or the motor end cap 300.

Referring to fig. 8, in one embodiment, the brush 100 includes a bristle guide 150, the bristle guide 150 and the brush holder 110 are aligned and fixed in a first direction X, the bristle guide 150, the bristle holder 130 and the elastic member 140 are sequentially aligned in the first direction X, the bristle guide 150 includes a through hole 151 penetrating the bristle guide 150 in the first direction X, and the through hole 151 is for receiving a portion of the bristles 120.

Wherein the bristle guide 150 serves to close the receiving notch of the receiving recess 111. The brush guide 150 and the brush holder 110 define a brush receiving cavity. The brush receiving cavity receives the bristle holder 130, the elastic member 140, and a portion of the bristles 120. One end 121 of the bristle 120 is located within the brush receiving cavity and the other end 122 of the bristle 120 extends from the through hole 151 to the outside of the brush receiving cavity.

In the motor 10 provided in this embodiment of the present application, through setting up the accommodation notch that the brush guide 150 is used for sealing accommodation groove 111, parts such as brush holder 130, elastic component 140 are limited in the brush accommodating cavity for the position of each part in brush 100 is comparatively regular, and the brush 100 of being convenient for normally, stable work. And the bristle holder 130 moves between the accommodating groove bottom 112 and the bristle guide plate 150 along the first direction X, so that the movement length of the bristle holder 130 is limited, and the elastic member 140 is ensured to have enough elasticity to ensure that the brush 100 is reliably contacted with the motor shaft 200 and the motor end cover 300, so that the service life of the motor bearing 400 is prolonged, and the safe and reliable operation of the motor 10 is ensured.

In addition, whether the brush 100 is operating normally can be judged by the relative positional relationship of the bristle holder 130 and the bristle guide plate 150, thereby improving the reliability of the contact of the brush 100 with the motor shaft 200 and the motor end cover 300. Illustratively, the brush 100 is mounted in the motor 10 with the bristle holder 130 spaced from the bristle guide 150 along the first direction X. As the bristles 120 wear, the distance between the bristle holder 130 and the bristle guide 150 decreases until the bristle holder 130 engages the bristle guide 150, at which point the bristle holder 130 cannot continue to move closer to the bristle guide 150. As the bristles 120 continue to wear, the other end 122 of the bristles 120 cannot contact the motor shaft 200 or the motor end cap 300. At this time, the brush 100 may be replaced to secure the reliability of the contact of the brush 100 with the motor shaft 200 and the motor end cap 300.

In one embodiment, the bristle guide 150 is removably attached to the brush holder 110. Illustratively, the bristle guide 150 and the brush holder 110 can be connected by screws, bolts, pins, snaps, or the like. When the brush 100 needs to be replaced, the brush guide plate 150 and the brush fixing member 110 can be detached, and the brush 100 can work normally by replacing the parts in the brush 100, so that the utilization rate of the brush 100 is improved. Illustratively, the brush bristles 120 of the brush 100 can be replaced when the brush bristles 120 are excessively worn, and the elastic member 140 can be replaced when the elastic force of the elastic member 140 is insufficient.

In one embodiment, along the first direction X, the projection of the through hole 151 is located within the projection of the bristle holder 130. The projection of the through hole 151 refers to the projection of a space formed by surrounding the wall of the through hole 151. The area of the through hole 151 is smaller than that of the bristle holder 130. The area of the through hole 151 refers to the area formed by surrounding the wall of the through hole 151. The area of the bristle holder 130 is the area of the plate surface perpendicular to the first direction X in the bristle holder 130.

In the motor 10 provided by the embodiment of the application, because the area of the through hole 151 is smaller than that of the bristle fixing seat 130, the bristle fixing seat 130 can be limited between the containing groove bottom 112 and the bristle guide plate 150 along the first direction X, so that the positions of all parts in the electric brush 100 are regular, the electric brush 100 can work normally and stably, the shaft current of the motor shaft 200 is ensured to be released better, the service life of the motor bearing 400 is prolonged, and the safe and reliable operation of the motor 10 is ensured. In addition, the projection of the through hole 151 along the first direction X is located on the bristle fixing base 130, so that the bristles 120 can be fixed on the bristle fixing base 130 along the first direction X and extend out of the accommodating groove 111 from the through hole 151 along the first direction X, thereby reducing bending of the bristles 120 and prolonging the service life of the bristles 120.

Referring to fig. 8, in one embodiment, a projection of the bristle guide 150 along the first direction X covers the receiving recess 111. Wherein, the projected area of the bristle guide 150 is greater than or equal to the projected area of the receiving recess 111. The bristle guide plate 150 covers the receiving notch. In this embodiment, the area of the bristle guide plate 150 is larger, so that the accommodating notch of the accommodating groove 111 can be better closed, and the bristle fixing seat 130 and the elastic piece 140 can be better limited in the accommodating groove 111.

Referring to fig. 9, fig. 9 is a cross-sectional view of a brush 100 according to an embodiment of the present disclosure, in which a bristle guide 150 includes a plurality of through holes 151, the brush 100 includes a plurality of bundles of bristles 120, each bundle of bristles 120 includes at least one bristle 120, and at least one of the plurality of through holes 151 is configured to receive at least one bundle of bristles 120. Wherein the plurality of through holes 151 are arranged at intervals. In one embodiment, each through hole 151 receives a bundle of bristles 120.

In the motor 10 provided in the embodiment of the present application, the brush 100 includes a plurality of bristles 120, and the other end 122 of each bristle 120 of the plurality of bristles 120 is configured to contact the motor shaft 200 or the motor end cap 300. When some of the bristles 120 are broken, the rest of the bristles 120 can work normally as the brush 100, so that the reliability of contact between the bristles 120 and the motor shaft 200 or the motor end cover 300 is improved, the better release of the shaft current of the motor shaft 200 is ensured, the service life of the motor bearing 400 is prolonged, and the safe and reliable operation of the motor 10 is ensured. And when each bundle of bristles 120 includes a plurality of bristles 120, the strength of one bundle of bristles 120 is greater and less likely to be broken, compared with one bundle of bristles 120, thereby ensuring the normal and stable operation of the brush 100. In addition, the through holes 151 are used for accommodating at least one bundle of bristles, and the through holes can serve to guide the movement of the bristles 120 and support the bristles 120.

In one embodiment, the diameter of the through hole 151 is greater than or equal to the diameter of each bundle of bristles 120. The larger diameter of the through-hole 151 reduces friction of the movement of the bristles 120 within the through-hole 151, facilitating the movement of the bristle holder 130 and bristles 120 in the first direction X by the resilient member 140.

Referring to fig. 10, fig. 10 is a cross-sectional view of a brush holder 110 and a bristle holder 130 according to an embodiment of the present application. Wherein the cross sections of the brush holder 110 and the bristle holder 130 are perpendicular to the first direction X.

In one embodiment, the brush 100 further includes a first guide structure 161 and a second guide structure 162, the first guide structure 161 and the second guide structure 162 being capable of sliding relative to each other in the first direction X. Wherein, the first guiding structure 161 is fixed on the side wall of the accommodating groove 111, the second guiding structure 162 is fixed on the periphery side of the bristle holder 130, one of the first guiding structure 161 and the second guiding structure 162 is a groove, and the other of the first guiding structure 161 and the second guiding structure 162 is a bump. In one embodiment, one of the first guide structure and the second guide structure is a slide rail and the other of the first guide structure and the second guide structure is a pulley.

Wherein the first guiding structure 161 extends along the first direction X. The first guide structure 161 and the second guide structure 162 are slidably coupled. In this embodiment, the first guiding structure 161 and the second guiding structure 162 are matched to realize sliding connection between the bristle holder 130 and the side wall of the accommodating groove 111. When the bristle holder 130 moves relative to the sidewall of the accommodating recess 111, the friction between the bristle holder 130 and the sidewall of the accommodating recess 111 is reduced. The elastic member 140 pushes the bristle holder 130 to move more smoothly, ensuring reliable contact between the brush 100 and the motor shaft 200 and the motor end cap 300.

Referring to fig. 11, fig. 11 is a cross-sectional view of a brush 100 according to an embodiment of the present disclosure. In one embodiment, the brush 100 further includes a positioning post 170, the positioning post 170 being fixed to the bristle holder 130, and the bristle holder 130, the positioning post 170, and the receiving slot bottom 112 being sequentially arranged along the first direction X. The elastic member 140 includes a spring, the spring is sleeved on the positioning post 170, and two ends of the spring along the first direction X are respectively contacted with the bristle fixing base 130 and the accommodating groove bottom 112.

The positioning post 170 is fixed to an end surface of the bristle holder 130 facing the accommodating groove bottom 112 along the first direction X. Along a first direction X, a projection of the positioning post 170 is located within the bristle holder 130. The spring is sleeved on the outer peripheral surface of the positioning column 170.

In the motor 10 provided in this embodiment of the present application, the positioning post 170 may play a role in positioning the spring, so that the position of the spring is relatively fixed, so that the spring pushes the bristle holder 130 and the bristles 120 to move along the first direction X. The reliability of the brush 100 in contact with the motor shaft 200 and the motor end cap 300 is improved. On the other hand, the positioning post 170 protrudes from the bristle holder 130 toward the accommodating groove bottom 112 along the first direction X, and the positioning post 170 can prevent the bristle holder 130 and the accommodating groove bottom 112 from being excessively close to each other, resulting in excessive compression of the spring and damage. The positioning post 170 in the embodiment of the present application may function as a protection spring.

In one embodiment, the brush 100 further includes a support sleeve 171 (shown in fig. 8). The support sleeve 171 is fixed to the bristle holder 130, and the bristle holder 130, the support sleeve 171, and the receiving groove bottom 112 are sequentially arranged in the first direction X. The bristle holder 130 includes a through hole, the through hole penetrates the bristle holder 130 along the first direction X, and the bristles 120 penetrate the through hole and are fixed in the wall of the through hole. The elastic member 140 is positioned in the support sleeve 171 and is sleeved on the outer circumferential side of the bristle 120. The support sleeve 171 serves to prevent the elastic member 140 from being excessively compressed.

Referring to fig. 5, in an embodiment, a motor bearing 400 is disposed in a motor shaft cavity 210, and the brush 100 and the motor bearing 400 are aligned along a first direction X. Wherein the brush 100 is located on a side of the motor bearing 400 facing away from the motor end cap 300. The outer ring of the motor bearing 400 is adapted to cooperate with the inner wall of the motor shaft cavity 210, i.e., the inner surface of the motor shaft 200, such that the outer ring of the motor bearing 400 can rotate following the motor shaft 200. The inner ring of the motor bearing 400 is adapted to cooperate with the motor end cap 300 such that the inner ring of the motor bearing 400 can support the motor shaft 200.

Referring to fig. 5, in an embodiment, the motor 10 further includes a rotary transformer 600 sleeved on the outer peripheral surface of the motor shaft 200. In the radial direction of motor shaft 200, the projection of resolver 600 at least partially overlaps the projection of motor bearing 400. Wherein the motor shaft 200 is radially perpendicular to the first direction X. Resolver 600 is used to monitor the rotational speed of motor shaft 200 in order to control the rotational speed of motor shaft 200, thereby improving the safety performance of electric vehicle 1. Resolver 600 and motor bearing 400 are radially aligned along motor shaft 200. In this embodiment, since the motor bearing 400 and the resolver 600 are respectively mounted on the inner surface and the outer surface of the motor shaft 200, the resolver 600 and the motor bearing 400 occupy a smaller axial dimension of the motor shaft 200, which reduces the axial dimension of the motor 10 along the motor shaft 200 and is beneficial to the miniaturization of the volume of the power assembly 2. The power assembly 2 is compactly integrated, so that the power assembly 2 is conveniently arranged and installed on the whole vehicle, the power assembly 2 can save space occupied by the electric vehicle 1, and other functional components are conveniently arranged and installed on the electric vehicle 1, so that the overall performance of the electric vehicle 1 is improved.

Referring to fig. 5, in one embodiment, the motor 10 further includes a bearing fixing portion 330, the bearing fixing portion 330 is used to fix the inner ring of the motor bearing 400, and the bearing fixing portion 330 is fixed to the motor end cover 300.

Referring to fig. 12, fig. 12 is an exploded view of an axial cover plate 302, an axial blocking member 332, a motor end cap 300, and a bearing fixing portion 330 according to an embodiment of the present application. In one embodiment, the motor 10 further includes an axial cover plate 302 and an axial seal 332, the motor end cap 300 includes an end cap through hole 301, the bearing fixture 330 includes a bearing through hole 331, the end cap through hole 301 is configured to receive the axial cover plate 302, the bearing through hole 331 is configured to receive the axial seal 332, and the brush 100 is electrically connected to the motor end cap 300 through the axial seal 332 and the axial cover plate 302. The brush 100 can be replaced by removing the axial cover plate 302 and the axial blocking member 332, thereby improving the convenience of maintenance or replacement of the brush 100.

In one embodiment, the motor bearing 400 may also be located outside the motor shaft cavity 210 (as shown in FIG. 14). The inner ring of the motor bearing 400 is fitted with the outer surface of the motor shaft 200, and the outer ring of the motor bearing 400 is fitted with the motor end cover 300. In the radial direction of motor shaft 200, the projection of brush 100 at least partially overlaps the projection of motor bearing 400. The motor 10 is reduced in size in the axial direction, i.e., the first direction X.

Referring to fig. 13 and 14, fig. 13 is a perspective view of a motor 10 according to an embodiment of the present disclosure; fig. 14 is a cross-sectional view of a motor 10 provided in an embodiment of the present application. In an embodiment, the motor 10 may not be integrated in the power assembly 2, the motor 10 may be a single motor, and the motor 10 is applied to various fields of aviation, national defense, industrial and agricultural production, daily life and the like in a single motor mode. The motor 10 includes a motor housing 310 and a cover plate 320 (shown in fig. 14). The motor end cover 300, the motor housing 310 and the cover plate 320 are sequentially connected along the axial direction of the motor shaft 200 and enclose a formed motor cavity. The brush 100 and at least a portion of the motor shaft 200 are housed within the motor cavity. The cover plate 320 includes a cover plate through hole penetrating the cover plate 320 along the axial direction of the motor shaft 200. Along the axial direction of the motor shaft 200, one end of the motor shaft 200 is located in the motor cavity and is rotatably connected to the motor end cap 300 through a motor bearing 400. The other end of the motor shaft 200 extends from the cover plate through hole to the outside of the motor cavity. Shaft current on motor shaft 200 can be conducted through brush 100 to motor end cap 300, motor housing 310, and cover plate 320.

In one embodiment, the motor 10 is integrated into the powertrain 2, and the motor end cap 300, the brush 100, and the input shaft 22 of the reduction gear are sequentially arranged along the axial direction of the motor shaft 200. In one embodiment, the distance between the brush 100 and the motor end cap 300 is less than the distance between the brush 100 and the input shaft 22 of the reduction gear along the axial direction of the motor shaft 200, i.e., along the first direction X.

In one embodiment, the powertrain 2 further includes a reducer housing 25 and a mounting hole (as shown in fig. 5), the reducer housing 25 for housing the reducer 21. The mounting hole penetrates the reducer housing 25 toward the end face of the motor 10 in the axial direction of the motor shaft 200. One end of the motor shaft 200, which is axially away from the motor end cover 300 along the motor shaft 200, extends into the reducer housing 25 through the mounting hole and is fixedly connected with the reducer input shaft 22.

In one embodiment, the powertrain 2 further includes a motor housing 310 and a housing through hole (as shown in fig. 5). The motor end cover 300, the motor housing 310 and the decelerator housing 25 are connected in the axial direction of the motor shaft 200. The brush 100 and at least part of the motor shaft 200 are accommodated in a motor housing 310, and a housing through hole penetrates through the motor housing 310 to axially face away from the end face of the motor end cover 300 along the motor shaft 200. Along the axial direction of the motor shaft 200, one end of the motor shaft 200 is located in the motor housing 310 and is rotatably connected to the motor end cap 300 through the motor bearing 400. The other end of the motor shaft 200 extends from the housing through hole to the outside of the motor housing 310, and extends into the decelerator housing 25 through the mounting hole and is fixedly connected with the decelerator input shaft 22.

Referring to fig. 6, 7 and 8, the present application provides a brush 100, the brush 100 includes a brush holder 110, bristles 120, a bristle holder 130 and an elastic member 140. The brush holder 110 includes a receiving recess 111 for receiving the bristle holder 130 and the elastic member 140, and the bristles 120 include one end 121 and the other end 122 arranged opposite to each other in the first direction X. The bristle holder 130 is used to hold one end 121 of the bristles 120, and the other end 122 of the bristles 120 is located outside the receiving recess 111. The receiving recess 111 includes a receiving recess bottom 112. The other end 122, the one end 121, the bristle holder 130, the elastic member 140 and the accommodating groove bottom 112 of the bristle 120 are sequentially arranged along the first direction X, and the elastic member 140 is used for pushing the bristle holder 130 to move away from the accommodating groove bottom 112 along the first direction X.

The brush 100 provided in the embodiment of the present application, the brush 100 is used to connect the motor shaft 200 and the motor end cap 300 to release the shaft current of the motor shaft 200. In the brush 100, for example, the brush holder 110 is used to contact the motor shaft 200 and the brush 120 is used to contact the motor end cover 300, and the brush holder 110 and the brush 120 are respectively in pressure-equalizing contact with the motor shaft 200 and the motor end cover 300 through the elastic member 140. And when the bristles 120 are worn, under the action of the elastic piece 140, the bristle fixing seat 130 drives the bristles 120 to move away from the accommodating groove bottom 112, so that the bristles 120 are ensured to be reliably contacted with the motor end cover 300. So that the brush 100 can normally release the shaft current of the motor shaft 200, the service life of the motor bearing 400 is prolonged, and the safe and reliable operation of the motor 10 is ensured.

Referring to fig. 8, in one embodiment, the brush 100 includes a bristle guide 150, the bristle guide 150 and the brush holder 110 are aligned and fixed in a first direction X, the bristle guide 150, the bristle holder 130 and the elastic member 140 are sequentially aligned in the first direction X, the bristle guide 150 includes a through hole 151 penetrating the bristle guide 150 in the first direction X, and the through hole 151 is for receiving a portion of the bristles 120. By arranging the bristle guide plate 150 for closing the accommodating notch of the accommodating groove 111, the bristle fixing seat 130, the elastic piece 140 and other parts are limited in the brush accommodating cavity, so that the positions of all parts in the brush 100 are relatively regular, and the brush 100 can work normally and stably. And the bristle guide plate 150 limits the movement length of the bristle holder 130, so that the elastic member 140 is ensured to have enough elasticity to reliably contact the brush 100 with the motor shaft 200 and the motor end cover 300, and the brush 100 can work normally and stably.

Referring to fig. 8, in one embodiment, along the first direction X, the projection of the through hole 151 is located in the projection of the bristle holder 130. In the brush 100 provided in this embodiment of the present application, since the area of the through hole 151 is smaller than the area of the bristle fixing seat 130, the bristle fixing seat 130 can be limited between the accommodating groove bottom 112 and the bristle guiding plate 150 along the first direction X, so that the positions of the components in the brush 100 are relatively regular, and the brush 100 can work normally and stably. In addition, the bristles 120 may be fixed to the bristle holder 130 along the first direction X and extend out of the receiving recess 111 from the through hole 151 along the first direction X, thereby reducing bending of the bristles 120 and improving the service life of the bristles 120.

Referring to fig. 8, in one embodiment, a projection of the bristle guide 150 along the first direction X covers the receiving recess 111. The bristle guide plate 150 has a larger area, so that the accommodating notch of the accommodating groove 111 can be better closed, and the bristle fixing base 130 and the elastic member 140 can be better limited in the accommodating groove 111.

Referring to fig. 9, in one embodiment, the bristle guide plate 150 includes a plurality of through holes 151, the brush 100 includes a plurality of bristles 120, each of the plurality of bristles 120 includes at least one bristle 120, and at least one of the plurality of through holes 151 is configured to receive at least one of the plurality of bristles 120. The brush 100 provided in the embodiment of the present application, the brush 100 includes a plurality of bristles 120, and the other end 122 of each bristle 120 in the plurality of bristles 120 is used to contact the motor shaft 200 or the motor end cap 300. When some of the bristles 120 are broken, the remaining bristles 120 may function as the brush 100, improving the reliability of contact of the bristles 120 with the motor shaft 200 or the motor end cap 300. And when each bundle of bristles 120 includes a plurality of bristles 120, the strength of one bundle of bristles 120 is greater and less likely to be broken, compared with one bundle of bristles 120, thereby ensuring the normal and stable operation of the brush 100. In addition, the through holes 151 are used for accommodating at least one bundle of bristles, and the through holes can serve to guide the movement of the bristles 120 and support the bristles 120.

Referring to fig. 10, in one embodiment, the brush 100 further includes a first guiding structure 161 and a second guiding structure 162, and the first guiding structure 161 and the second guiding structure 162 can slide relatively along the first direction X. Wherein, the first guiding structure 161 is fixed on the side wall of the accommodating groove 111, the second guiding structure 162 is fixed on the periphery side of the bristle holder 130, one of the first guiding structure 161 and the second guiding structure 162 is a groove, and the other of the first guiding structure 161 and the second guiding structure 162 is a bump. In one embodiment, one of the first guide structure and the second guide structure is a slide rail and the other of the first guide structure and the second guide structure is a pulley. In this embodiment, the first guiding structure 161 and the second guiding structure 162 are matched to realize sliding connection between the bristle holder 130 and the side wall of the accommodating groove 111. So that the elastic member 140 pushes the bristle holder 130 to move more smoothly.

Referring to fig. 11, in one embodiment, the brush 100 further includes a positioning post 170, the positioning post 170 is fixed to the bristle holder 130, and the bristle holder 130, the positioning post 170 and the receiving slot 112 are sequentially arranged along the first direction X. The elastic member 140 includes a spring, the spring is sleeved on the positioning post 170, and two ends of the spring along the first direction X are respectively contacted with the bristle fixing base 130 and the accommodating groove bottom 112. In the brush 100 provided in the embodiment of the present application, the positioning post 170 may play a role in positioning the spring, so that the spring pushes the bristle holder 130 and the bristles 120 to move along the first direction X. On the other hand, the positioning posts 170 are provided to prevent the springs from being damaged by excessive compression.

The brushes, the motor, the power assembly and the vehicle provided by the embodiments of the present application are described in detail, and specific examples are applied to the description of the principles and embodiments of the present application, and the description of the embodiments is only used for helping to understand the method and the core idea of the present application; meanwhile, as those skilled in the art will vary in specific embodiments and application ranges according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims (10)

1. The utility model provides a brush, its characterized in that, the brush includes brush mounting, brush hair fixing base and elastic component, the brush mounting includes the accepting groove, the accepting groove is used for holding the brush hair fixing base with the elastic component, the brush hair includes along the relative one end and the other end of arranging of first direction, the brush hair fixing base is used for fixing the one end of brush hair, the other end of brush hair is located the accepting groove is outside, the accepting groove includes accepts the tank bottom, wherein:

along the first direction, the other end of the bristle, the bristle fixing seat, the elastic piece and the containing groove bottom are sequentially arranged, and the elastic piece is used for pushing the bristle fixing seat to move away from the containing groove bottom along the first direction.

2. The brush of claim 1, further comprising a bristle guide, wherein the bristle guide and the brush holder are aligned and secured in the first direction, wherein the bristle guide, the bristle holder, and the elastic member are aligned in the first direction, wherein the bristle guide includes a through hole extending through the bristle guide in the first direction, and wherein the through hole is configured to receive a portion of the bristles.

3. The brush of claim 2, wherein, in the first direction, a projection of the through hole is located within a projection of the bristle holder; along the first direction, the projection of the bristle guide plate covers the accommodating groove.

4. A brush according to claim 2 or 3, wherein the bristle guide comprises a plurality of said through holes, the brush comprising a plurality of said bristles, each said bristle bundle comprising at least one said bristle, at least one of said plurality of through holes being adapted to receive at least one said bristle bundle.

5. The brush of claim 1, further comprising a first guide structure and a second guide structure, the first guide structure and the second guide structure being relatively slidable along the first direction, wherein:

The first guide structure is fixed on the side wall of the accommodating groove, the second guide structure is fixed on the periphery of the bristle fixing seat, one of the first guide structure and the second guide structure is a groove, and the other of the first guide structure and the second guide structure is a bump; or one of the first guide structure and the second guide structure is a sliding rail, and the other of the first guide structure and the second guide structure is a pulley.

6. The brush of claim 1, further comprising a positioning post, the positioning post being fixed to the bristle holder, the positioning post, and the receiving slot bottom being arranged in sequence along the first direction;

the elastic piece comprises a spring, the spring is sleeved on the positioning column, and two ends of the spring along the first direction are respectively contacted with the bristle fixing seat and the containing groove bottom.

7. An electric motor comprising a motor end cap, a motor shaft, and a brush as claimed in any one of claims 1-6, the motor shaft and the motor end cap being aligned in the first direction, the first direction being parallel to the motor shaft axis, one of the brush holder and the brush bristles being in contact with the motor shaft, the other of the brush holder and the brush bristles being in contact with the motor end cap.

8. The motor of claim 7, wherein the motor shaft includes a motor shaft cavity extending through the motor shaft in the first direction toward an end face of the motor end cap, the motor shaft cavity for receiving the brush mount, the brush mount in contact with an inner wall of the motor shaft cavity, wherein:

along the first direction, the motor end cover, the other end of the brush hair and the containing groove bottom are sequentially arranged, and the other end of the brush hair is in contact with the motor end cover.

9. A power assembly, characterized in that the power assembly comprises a speed reducer and the motor according to claim 7 or 8, the motor shaft is fixedly connected with a speed reducer input shaft of the speed reducer, and the motor end cover, the electric brush and the speed reducer input shaft are sequentially arranged along the first direction.

10. An electric vehicle comprising a vehicle body, wheels and an electric machine as claimed in any one of claims 7-8 or a powertrain as claimed in claim 9 for driving the wheels, the vehicle body being adapted to secure the electric machine or the powertrain.