Grounding brush conducting ring for new energy vehicle driving motor to automatically release along with shaft

Abstract

The invention relates to an annular structure grounding system module capable of automatically releasing electric brushes during installation, which comprises a conducting ring and electric brush self-releasing mechanisms, and is characterized in that the center of the conducting ring is provided with an opening for a main shaft to penetrate through, and the annular end surface of the conducting ring is uniformly provided with a plurality of electric brush self-releasing mechanisms along the circumferential direction; each electric brush self-release mechanism comprises an electric brush, a brush holder, an elastic piece and a mounting seat, sliding grooves are formed in the two sides of the brush holder, and clamping grooves are formed in the top and one side of the brush holder; an electric brush is arranged in the brush holder, and the head part and the tail part of the electric brush are respectively limited and supported through torsion springs; before the grounding ring and the main shaft are installed, the electric brush is limited in the brush holder by two ends of the torsion spring and cannot move freely. During installation, the main shaft of the motor passes through the central hole of the grounding ring and pushes the tail end of the extension end of the torsion spring to move along a specific direction, the limit of the contact end of the electric brush is relieved, and the electric brush is released along the fixed direction of the inner cavity of the brush holder and freely pops up. The annular grounding module can be installed in a limited space, the axial force for pushing the torsion spring when the main shaft is installed is converted into the radial release force of the electric brush, the release of the electric brush can be realized when the main shaft of the motor is installed, and the redundant electric brush release step is omitted.

Description

Technical Field

[0001] The invention relates to an automatic release mechanism of a conductive ring with a brush, and in particular to a grounding brush conductive ring which is installed in a driving motor of a new energy vehicle and is in sliding contact with a main shaft to lead out shaft current. Background Art

[0002] As the electrical architecture of new energy vehicles is upgraded to 800V or even higher voltage, it means that the shaft current of the drive motor will cause more damage to the motor bearings. First, the motor controller of the new energy vehicle converts DC into high-frequency alternating current to drive the motor to run. The capacitive induction voltage caused by the current conversion is coupled to the motor shaft, and then the bearing is discharged at high frequency, burning the bearing. In addition, the high-frequency magnetic flux generated by the common-mode current of the motor controller will also cause high-frequency loop current in the drive motor, which will also damage the bearing. Therefore, a set of conductive modules is needed to export harmful shaft currents to protect the bearings from electrical corrosion. Usually, the brush grounding system is the grounding solution with the lowest impedance, the best shaft current export effect, and the longest life. At the same time, considering the ease of installation, it is a more economical and efficient solution to make a ring-shaped grounding module and install it close to the bearing.

[0003] The existing annular grounding scheme generally adopts an annular conductive fiber module, which consists of a piece of annular metal with multiple bundles of conductive fibers sandwiched in the middle. The potential disadvantages of this annular conductive fiber module are: 1. Short life: As the motor runs for a long time, the fiber wears out, and the conductive fiber gradually shortens, and cannot stably contact the motor shaft, thus failing to protect the motor bearings during the entire life cycle of the motor. 2. High impedance: The contact resistance between the conductive fiber and the shaft is 1Ω, while the contact resistance between the brush and the shaft is 0.01Ω. The contact resistance of the conductive fiber is two orders of magnitude higher than that of the carbon brush, and the efficiency of the shaft current is not high. 3. Additional processes and higher costs: The usual way to reduce the contact resistance between the conductive fiber and the shaft is to apply silver glue to the corresponding contact position of the shaft, and in the oil-cooled motor filled with oil, an additional isolation module is required to isolate the oil to reduce the impedance. These increase the cost, but the effect of reducing the impedance is not obvious or sustainable.

[0004] The disadvantage of other known annular conductive modules is that they are difficult to install or require extra installation steps. The condition for good contact between the carbon brush and the spindle is that the contact force needs to be continuously applied to the carbon brush. Under current conditions, the carbon brush is usually pushed by a spring to contact the spindle. Before the conductive ring is installed on the spindle, the carbon brush will protrude a long distance from the inside of the conductive ring under the action of the spring force. Directly assembling the carbon brush conductive ring with the spindle will cause interference and lead to assembly abnormality. Therefore, a mechanism is needed to fix the carbon brush in the conductive ring before installation and release the carbon brush after the spindle is installed. The existing release requires additional auxiliary installation tools or parts and additional installation steps outside the spindle installation process to realize the release of the carbon brush, and it is impossible to achieve a direct one-time release of the carbon brush after the spindle is installed. Summary of the invention

[0005] In view of the above problems, the present invention discloses a grounding brush conductive ring of a new energy vehicle drive motor that is self-released with the shaft, which solves the problem in the prior art that the brush release of the brush conductive ring requires additional auxiliary installation tools or parts and requires additional installation procedures, and also solves the problem that the contact impedance of the annular conductive fiber module is relatively large and the service life is relatively low. A conductive ring with an annular structure is used in conjunction with the directional opening of the brush and the brush holder, and the tip of the torsion spring is turned to convert the axial force of the push spring during the installation of the main shaft into the radial release force of the brush, thereby achieving the fixation and release of the brush. In the limited annular space, not only the brush holder installation and support structure of the brush are set, but also the self-release mechanism of the brush is designed, which realizes the quick and easy installation of the conductive ring and the self-release of the brush, improves work efficiency and reduces costs.

[0006] The specific technical solutions are as follows:

[0007] A grounding brush conductive ring with shaft self-release of a new energy vehicle drive motor is arranged in the electric drive and coaxially arranged with the main shaft or the gear box main shaft; the grounding brush conductive ring includes a conductive ring and a brush self-release mechanism, the center of the conductive ring is provided with an opening for the main shaft to pass through, at least one set of brush self-release mechanisms is evenly arranged on the annular end surface of the conductive ring along the circumferential direction, each brush self-release mechanism includes a brush, a brush holder, an elastic member, and a mounting seat, the brush holder is fixed to the end surface of the conductive ring by a fastener, the front and rear ends of the brush holder are open, and slide grooves are provided on both sides of the brush holder, one end of the slide grooves extends to the rear end opening of the brush holder, and a clamping groove is provided on the top and one side of the brush holder; the brush is arranged in the brush holder, and the head and tail of the brush are respectively inserted into the brush holder through the elastic member The spring element is provided at one side of the brush holder through a mounting seat, and a supporting end and a limiting end are provided at both ends of the spring element, wherein the supporting end of the spring element passes through a slot on one side of the brush holder and presses forward to support the tail of the brush, and the limiting end of the spring element passes through a card slot at the top of the brush holder and presses and limits the head of the brush, so that the brush is kept in the brush holder, and one end of the limiting end of the elastic element is bent and extends forward to the central opening of the conductive ring, so that when the main shaft passes through the central opening of the conductive ring, the limiting end of the elastic element is pushed out of the card slot at the same time, so that the limiting end of the elastic element no longer limits the head of the brush, and at the same time, the tail of the brush is released and freely popped out along the fixed direction of the inner cavity of the brush holder under the support of the supporting end of the elastic element, thereby pressing its head against the main shaft.

[0008] Furthermore, the conductive ring is also provided with a protective sleeve that cooperates with the conductive ring. The protective sleeve is in an annular structure and is adapted to the size and shape of the conductive ring. A plurality of inner baffles for abutting against the end face of the conductive ring are vertically provided on the inner side of the protective sleeve. A plurality of positioning blocks are extended outwardly from the outer side of the protective sleeve. An outer baffle is vertically provided on the outer side of the conductive ring. A positioning groove for accommodating the positioning block is provided on the top of the outer baffle to realize the insertion and positioning of the protective sleeve and the conductive ring.

[0009] Furthermore, the outer baffle surface of the conductive ring is arranged in an arc shape, and the outer baffle is located between two adjacent brush self-release mechanisms, and the outer arc surface and bottom surface of the conductive ring are in contact with the housing of the electric drive.

[0010] Furthermore, the brush holder is integrally stamped and has a "J"-shaped structure, so that the brush holder includes a shell portion and a flat plate portion horizontally arranged on both sides of the shell portion, the flat plate portion is fixed to the end face of the conductive ring by fasteners, the slide groove and the card groove are respectively arranged on both sides and the top of the shell portion, and the brush is arranged on the inner side of the shell portion.

[0011] Furthermore, a recess is provided on the end surface of the conductive ring at each brush self-release mechanism, and the recess and projection are fitted on both sides of the flat plate portions on both sides of the brush holder, and a boss is provided on the surface of the recess at the inner side of the shell portion, and the boss cooperates with the inner side of the shell portion to form a square area and limit and guide the brush.

[0012] Furthermore, the limiting end of the elastic member is bent in a Z shape, and one end of the flat plate portion of the brush holder close to the elastic member is bent upward to be provided with a limiting clip for limiting the limiting end of the elastic member, so that one end of the limiting end is pressed against the limiting clip, the middle part of the limiting end passes through the slot on the brush holder and limits the brush head, and at the same time the slot limits the middle part of the limiting end in the horizontal direction, and the other end of the limiting end is bent and extends to the central opening of the conductive ring.

[0013] Furthermore, the elastic member is preferably a cylindrical helical torsion spring, and the extended ends at both ends of the torsion spring respectively form the supporting end and the limiting end.

[0014] Furthermore, the mounting seat is a cylindrical rotating body and is used to sleeve the torsion spring, and the mounting seat is arranged on the flat plate portion of the brush holder or on the end surface of the conductive ring.

[0015] Furthermore, the brush includes a brush body and a brush braid, the brush braid passes through the slide groove on the other side of the brush holder and is connected and fixed to the brush holder or the conductive ring. The top and tail of the head of the brush body are respectively provided with grooves for pressing and contacting with the limiting end and the supporting end of the elastic part. The brush body is installed in the square area formed by the bosses of the brush holder and the conductive ring.

[0016] Furthermore, the groove at the head of the brush body is in a stepped groove structure and is located at the top of the head of the brush body, and the groove at the tail of the brush body is in a V-shaped groove structure.

[0017] The beneficial effects of the present invention are embodied in:

[0018] (1) The present invention not only sets up a brush holder installation and support structure in a limited annular space, but also designs a self-release mechanism for the brush, which can directly replace the existing conductive fiber ring without changing the motor structure design, which can greatly reduce the contact impedance, improve the shaft current extraction efficiency, and extend the life of the motor bearing. The self-release brush conductive ring is applied in the wet environment of the high-voltage oil-cooled motor, and the effect of reducing impedance and extending the life of the motor will be more significant.

[0019] (2) The present invention adopts a conductive ring with an annular structure to cooperate with the directional opening of the brush and the brush holder, and utilizes the tip bending of the torsion spring to convert the axial force of the push spring during the main shaft installation into the radial release force of the brush, thereby realizing the automatic release of the brush without the need for additional tooling and parts support, reducing the additional carbon brush release process and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0022] Figure 3 It is a schematic structural diagram of the brush self-releasing mechanism on the conductive ring in the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the brush before being released in the present invention (excluding the protective cover).

[0024] Figure 5 for Figure 4 Enlarged schematic diagram of point B in the middle.

[0025] Figure 6 It is a schematic diagram of the structure of the brush after being released in the present invention (excluding the protective cover).

[0026] Figure 7 for Figure 6 Enlarged schematic diagram at point C in the middle.

[0027] Figure 8 It is a structural schematic diagram of the brush holder in the present invention.

[0028] Fig. 9 It is a schematic diagram of the structure of the brush in the present invention.

[0029] Description of reference numerals: conductive ring (1), outer baffle (12), positioning groove (121), concave platform (13), convex platform (14);

[0030] A brush (2), a brush braid (21), a step groove (22), a V-shaped groove (23), a sliding contact surface (24), and a brush body (25);

[0031] A brush holder (3), a housing portion (301), a flat plate portion (302), a slot (31), a slide groove (32), and a limiter strip (33);

[0032] An elastic member (4), a limiting end (41), and a supporting end (42);

[0033] A mounting seat (5), a protective sleeve (6), an inner baffle (61), a positioning block (62), a rivet (7), and a main shaft (8). DETAILED DESCRIPTION

[0034] In order to make the technical solution of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the present invention and any solution derived from conventional reasoning shall fall within the protection scope of the present invention. The fixed connection and fixed setting mentioned in the present invention are all common connection methods in the mechanical field, including welding, bolt and nut connection, and screw connection.

[0035] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] like Figure 1-7 As shown, this embodiment provides a grounding brush conductive ring with shaft self-release of a new energy vehicle drive motor, which is arranged in the electric drive and coaxially arranged with the main shaft or the gear box main shaft, and the bottom surface and outer cylindrical surface of the grounding brush conductive ring are partially or completely in contact with the housing of the electric drive. The grounding brush conductive ring includes a conductive ring 1 and a brush self-release mechanism. The center of the conductive ring 1 is provided with an opening for the main shaft 8 to pass through. Three sets of brush self-release mechanisms are evenly distributed along the circumferential direction on the annular end surface of the conductive ring 1. Each brush self-release mechanism includes a brush 2, a brush holder 3, an elastic member 4, and a mounting seat 5. The brush holder 3 is fixed to the end surface of the conductive ring 1 by a fastener. The front and rear ends of the brush holder 3 are open. Slide grooves 32 are provided on both sides of the brush holder 3. One end of the slide groove 32 extends to the rear end opening of the brush holder 3. A clamping groove 31 is provided on the top and one side of the brush holder 3. A brush 2 is arranged in the brush holder 3, and the head and tail of the brush 2 are respectively limited and supported by the elastic member 4.

[0037] In this embodiment, the elastic member 4 is preferably a cylindrical helical torsion spring. Other methods using springs of similar form and structure to trigger and release the brush 2 are also within the protection scope of this patent. The extended ends at both ends of the torsion spring respectively form a supporting end 42 and a limiting end 41. The torsion spring is arranged on one side of the brush holder 3 through the mounting seat 5. The two ends of the torsion spring are respectively provided with a supporting end 42 and a limiting end 41, wherein the supporting end 42 of the torsion spring passes through the slot 32 on one side of the brush holder 3 and presses forward to support the tail of the brush 2, and the limiting end 41 of the torsion spring passes through the card slot 31 at the top of the brush holder 3 and presses and limits the head of the brush 2, which is used for limiting the brush 2 before self-release, so that the brush is kept in the brush holder 3, and one end of the limiting end 41 of the torsion spring is bent and extends forward to the central opening of the conductive ring 1, so that when the main shaft 8 passes through the central opening of the conductive ring 1, the limiting end 41 of the torsion spring is pushed to disengage from the card slot 31, so that the limiting end 41 of the torsion spring no longer limits the head of the brush 2, and at the same time, the tail of the brush 2 is released and freely popped out along the fixed direction of the inner cavity of the brush holder 3 under the support of the supporting end 42 of the torsion spring, thereby pressing its head against the main shaft 8.

[0038] In this embodiment, the conductive ring 1 is made of metal or metal composite material, and the implementation method is not limited. In this embodiment, it is die-casting. The conductive ring 1 is also provided with a protective sleeve 6 that matches the conductive ring 1. The protective sleeve 6 is annular and matches the size and shape of the conductive ring 1. A number of inner baffles 61 for abutting against the end face of the conductive ring 1 are vertically provided on the inner side of the protective sleeve 6. A number of positioning blocks 62 are extended outward from the outer side of the protective sleeve 6. An outer baffle 12 is vertically provided on the outer side of the conductive ring 1. A positioning groove 121 for accommodating the positioning block 62 is provided on the top of the outer baffle 12 to realize the insertion and positioning of the protective sleeve 6 and the conductive ring 1. The installation and connection method of the protective sleeve 6 and the conductive ring 1 is not limited, and the protective sleeve 6 can be eliminated in some applications.

[0039] In this embodiment, the outer baffle plate 12 on the outer periphery of the conductive ring 1 is arranged in an arc surface, and the outer baffle plate 12 is located between two adjacent brush self-release mechanisms, and the outer arc surface and bottom surface of the conductive ring 1 are partially or completely in contact with the housing of the electric drive.

[0040] like Figure 8 As shown, the brush holder 3 is integrally stamped and formed in a "J"-shaped structure, so that the brush holder 3 includes a housing portion 301 and flat plate portions 302 horizontally arranged on both sides of the housing portion 301. The installation and connection method of the brush holder 3 and the conductive ring 1 is not limited. In this embodiment, the rivets 7 are used to connect the flat plate portions 302 on both sides of the brush holder 3. The rivets 7 cooperate with the riveting interface to fix the flat plate portions 302 on both sides of the brush holder 3. The sliding grooves 32 and the card slots 31 are respectively arranged on both sides and the top of the housing portion 301, and the brush 2 is arranged inside the housing portion 301.

[0041] In this embodiment, a recess 13 is provided on the end surface of the conductive ring 1 at each brush self-release mechanism, and the concave and convex sides are arranged in contact with the flat plate parts 302 on both sides of the brush holder 3, and a boss 14 is provided on the surface of the recess 13 at the inner side of the shell part 301. The boss 14 cooperates with the inner side of the shell part 301 to form a square area and limit and guide the brush 2.

[0042] In this embodiment, the limit end 41 of the torsion spring is bent in a Z shape, and one end of the flat plate portion 302 of the brush holder 3 close to the torsion spring is bent upward to provide a limit clip 33 for limiting the limit end 41 of the torsion spring, so that one end of the limit end 41 is pressed against the limit clip 33, and the middle part of the limit end 41 passes through the slot 31 on the brush holder 3 and limits the head of the brush 2. At the same time, the slot 31 limits the middle part of the limit end 41 in the horizontal direction, and the other end of the limit end 41 is bent and extends to the central opening of the conductive ring 1.

[0043] In this embodiment, the mounting seat 5 is a cylindrical rotating body and is used to mount a torsion spring. The mounting seat 5 is arranged on the flat plate portion 302 of the brush holder 3 or on the end surface of the conductive ring 1. In this embodiment, the mounting seat 5 is longitudinally penetrated in a circular hole on the flat plate portion 302 on one side.

[0044] like Fig. 9 As shown, the brush 2 includes a brush body 25 and a brush braid 21. The brush braid 21 passes through the slot 32 on the other side of the brush holder 3 and is connected and fixed to the brush holder 3 or the conductive ring 1. In this embodiment, the brush braid 21 is connected to the flat plate 302 of the brush holder 3. In some applications, the brush braid 21 can be omitted to reduce costs. The top and tail of the head of the brush body 25 are respectively provided with grooves for pressing and contacting with the limit end 41 and the support end 42 of the torsion spring. The head end face of the brush body 25 is a sliding contact surface 24 for contacting the main shaft 8. In this embodiment, the groove of the head of the brush body 25 is a stepped groove structure and is located at the top of the head of the brush body 25. The groove of the tail of the brush body 25 is a V-shaped groove 23 structure. The brush body 25 is installed in the square area formed by the boss 14 of the brush holder 3 and the conductive ring 1; the brush holder 3 is fixed to the conductive ring 1 to confine the brush 2 in the square area.

[0045] like Figure 1-2 As shown, the main shaft 8 is inserted into the center hole of the conductive ring 1 and pushed along the axial direction. When it touches the bent part of the limit end 41 of the torsion spring, the limit end 41 of the torsion spring is pushed upward. The limit end 41 will retract toward the outer periphery of the conductive ring 1 under the action of the spring force, completing the triggering action of the torsion spring.

[0046] like Figure 6-7 As shown, after the torsion spring is axially pushed and retracted, the support end 42 of the torsion spring simultaneously pushes the brush 2 to move toward the center of the conductive ring 1, thereby completing the self-release of the brush 2.

[0047] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A grounding brush conductive ring of a new energy vehicle drive motor that is self-released with the shaft, which is arranged in the electric drive and coaxially with the main shaft or the gear box main shaft; characterized in that: The grounding brush conductive ring comprises a conductive ring (1) and a brush self-releasing mechanism. The conductive ring (1) is provided with an opening at its center for the main shaft (8) to pass through. At least one set of brush self-releasing mechanisms is evenly arranged on the annular end surface of the conductive ring (1) along the circumferential direction. Each brush self-releasing mechanism comprises a brush (2), a brush holder (3), an elastic member (4), and a mounting seat (5). The brush holder (3) is fixed to the end surface of the conductive ring (1) by means of fasteners. Slide grooves (32) are provided on both sides of the brush holder (3). One end of the slide grooves (32) extends to the rear end opening of the brush holder. A clamping groove (31) is provided on the top and one side of the brush holder (3). The brush (2) is arranged in the brush holder (3). The head and tail of the brush (2) are respectively limited and supported by the elastic member (4). The elastic member (4) is arranged on one side of the brush holder (3) by means of the mounting seat (5). Supporting members (31) are provided at both ends of the elastic member. The brush (2) is provided with an end (42) and a limiting end (41), wherein the supporting end (42) of the elastic member passes through the opening of the slide groove (32) on one side of the brush holder and presses forward to support the tail of the brush (2), and the limiting end (41) of the elastic member passes through the card slot (31) at the top of the brush holder and presses and limits the head of the brush (2), so that the brush (2) is kept in the brush holder (3), and one end of the limiting end (41) of the elastic member is bent and extends forward to the central opening of the conductive ring (1), so that when the main shaft (8) passes through the central opening of the conductive ring (1), the limiting end (41) of the elastic member (4) is pushed to disengage from the card slot (31), so that the limiting end (41) of the elastic member no longer limits the head of the brush (2), and at the same time, the tail of the brush (2) is released and freely popped out along the fixed direction of the inner cavity of the brush holder (3) under the support of the supporting end (42) of the elastic member (4), so that its head is pressed against the main shaft (8).

2. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released with the shaft as claimed in claim 1, characterized in that: The conductive ring (1) is also provided with a protective sleeve (6) matched with the conductive ring. The protective sleeve (6) is annular in structure and matches the size and shape of the conductive ring (1). A plurality of inner baffles (61) for abutting against the end surface of the conductive ring (1) are vertically provided on the inner side of the protective sleeve (6). A plurality of positioning blocks (62) are extended outwardly from the outer side of the protective sleeve (6). An outer baffle (12) is vertically provided on the outer side of the conductive ring (1). A positioning groove (121) for accommodating the positioning block (62) is provided on the top of the outer baffle (12) to achieve insertion and positioning of the protective sleeve (6) and the conductive ring (1).

3. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released with the shaft as claimed in claim 2, characterized in that: The outer baffle (12) on the outer periphery of the conductive ring (1) is provided with an arc surface, and the outer baffle (12) is located between two adjacent brush self-releasing mechanisms. The outer arc surface and the bottom surface of the conductive ring (1) are in contact with the housing of the electric drive.

4. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released with the shaft as claimed in claim 1, characterized in that: The brush holder (3) is integrally stamped and has a "J"-shaped structure, such that the brush holder (3) comprises a shell portion (301) and flat plate portions (302) horizontally arranged on both sides of the shell portion (301); the flat plate portion (302) is fixed to the end surface of the conductive ring (1) by means of fasteners; the sliding grooves (32) and the clamping grooves (31) are respectively arranged on both sides and the top of the shell portion (301); and the brush (2) is arranged on the inner side of the shell portion (301).

5. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released with the shaft as claimed in claim 4, characterized in that: A concave platform (13) is provided on the end surface of the conductive ring (1) at each brush self-release mechanism, and the two sides of the concave and convex are arranged in contact with the flat plate parts (302) on both sides of the brush holder (3), and a convex platform (14) is provided on the surface of the concave platform (13) at the inner side of the shell part (301), and the convex platform (14) cooperates with the inner side of the shell part (301) to form a square area and limit and guide the brush (2).

6. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released along with the shaft as claimed in claim 4, characterized in that: The limiting end (41) of the elastic member is bent in a Z shape, and one end of the flat plate portion (302) on the brush holder (3) close to the elastic member (4) is bent upward to be provided with a limiting clamping strip (33) for abutting and limiting the limiting end (41) of the elastic member, so that one end of the limiting end (41) is pressed against the limiting clamping strip (33), the middle part of the limiting end (41) passes through the clamping slot (31) on the brush holder (3) and limits the head of the brush (2), and the other end of the limiting end (41) is bent and extends to the central opening of the conductive ring (1).

7. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released with the shaft as claimed in claim 6, characterized in that: The elastic member (4) is preferably a cylindrical helical torsion spring, and the extended ends at both ends of the cylindrical helical torsion spring respectively form the supporting end (42) and the limiting end (41).

8. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released along with the shaft as claimed in claim 7, characterized in that: The mounting seat (5) is a cylindrical rotating body and is used to sleeve a cylindrical helical torsion spring. The mounting seat (5) is arranged on the flat plate portion (302) of the brush holder (3) or on the end surface of the conductive ring (1).

9. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released along with the shaft as claimed in claim 5, characterized in that: The brush (2) comprises a brush body (25) and a brush braid (21); the brush braid (21) passes through the opening of a slide groove (32) on the other side of the brush holder (3) and is connected and fixed to the brush holder (3) or the conductive ring (1); the top and tail of the head of the brush body (25) are respectively provided with grooves for pressing and contacting with the limiting end (41) and the supporting end (42) of the elastic member; the brush body (25) is installed in a square area formed by the boss (14) of the brush holder (3) and the conductive ring (1).

10. The grounding brush conductive ring of the new energy vehicle driving motor that is self-released along with the shaft as claimed in claim 9, characterized in that: The groove at the head of the brush body (25) is in a stepped groove structure and is located at the top of the head of the brush body (25), and the groove at the tail of the brush body (25) is in a V-shaped groove (23) structure.

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