Shaft current conducting brush device and motor

Abstract

The utility model discloses a shaft current conductive brush device and a motor. According to the utility model, the shaft current conductive brush device comprises a ring body, at least one end face of the ring body is provided with a plurality of mounting grooves arranged along the circumferential direction, and each mounting groove is provided with a first opening located on the end face of at least one side of the ring body, and a plurality of electrostatic charge clearing assemblies, the electrostatic charge removing assemblies are installed in the installation grooves along the first openings, the conductive fibers of the electrostatic charge removing assemblies extend in the radial direction towards the area formed by surrounding of the ring body, and at least part of the conductive fibers extend into the area formed by surrounding of the ring body. Compared with the prior art, the production efficiency is high, and the manufacturing process is simple.

Description

Technical Field

[0001] The utility model relates to the field of bearing protection rings, in particular to a shaft current conductive brush device and a motor. Background Art

[0002] During the operation of the motor, the shaft current will cause electrical corrosion in the motor bearings, seriously affecting the service life of the bearings. Therefore, relevant measures need to be taken to eliminate or reduce the shaft current to avoid electrical corrosion in the bearings.

[0003] In the prior art, the conductive fibers of the axial current conductive brush device are fixed by laminating metal rings. The production process is complicated and cumbersome, making it difficult to realize automated production, and it is not conducive to controlling the uniformity and density of the distribution of the conductive fibers on the circumference. Limited by the lamination method of fixing the conductive fibers, the single-layer fixed conductive fibers are relatively thin, and a thicker conductive brush is obtained by splicing multiple layers, so as to adapt to high-power motors, resulting in a larger axial size of the product. The production process of each brush needs to be customized according to the diameter of the shaft, including: customization of the metal diameter used to fix the brush, customization of a specific diameter cutting knife for cutting the brush after winding, etc. The manufacturing process is complex and the manufacturing cycle is long. Utility Model Content

[0004] The utility model aims to provide an axial current conductive brush device and a motor, which have high production efficiency and simple manufacturing process.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides an axial current conductive brush device, comprising:

[0006] A ring body, wherein at least one end surface of the ring body is provided with a plurality of mounting grooves arranged along the circumferential direction, and the mounting groove has a first opening located on the end surface of at least one side of the ring body, and

[0007] A plurality of static charge removal components are each installed in the installation groove along the first opening, and the conductive fibers of the static charge removal components radially extend toward the area surrounded by the ring body, and the conductive fibers at least partially extend into the area surrounded by the ring body.

[0008] Compared with the prior art, the embodiment of the utility model is that since the static charge removal component is installed in the installation groove along the first opening, the first opening is located at the end face of the ring body and will not be limited by the interference of the ring surface inside the ring body, so that the static charge removal component is easy to install in the installation groove, and the installation is convenient, and it is easy to realize automatic installation. In addition, a plurality of circumferentially arranged installation grooves are provided, so that each installation groove is installed with a static charge removal component, that is, each installation groove is inserted with conductive fibers, which ensures that more dense conductive fibers can be distributed on the circumference compared with the prior art, and solves the problem that the prior art is limited by the laminated conductive fibers being too thin, or the ring body being too thick due to multi-layer splicing. Therefore, the axial size of the axial current conductive brush device in the present application will not be too large, and can meet the application conditions with large axial current and axial space restrictions.

[0009] In one embodiment, the mounting groove further has an outlet located on the inner annular surface of the ring body, and the first opening extends to the inner annular surface of the ring body and communicates with the outlet.

[0010] In one embodiment, the mounting groove includes: a first groove and a second groove, the first groove and the second groove are arranged at intervals and opened on the ring body, and the first opening of the first groove and the first opening of the second groove are respectively located on different end surfaces of the ring body.

[0011] In one embodiment, there are a plurality of first grooves, which are evenly distributed along the circumferential direction; and / or

[0012] There are a plurality of second grooves, which are evenly distributed along the circumferential direction.

[0013] In one embodiment, the static charge removal assembly further includes a metal fixing member for clamping the conductive fiber.

[0014] In one embodiment, the conductive fiber passes through the metal fixing piece, and the static charge removal component is formed by the metal fixing piece clamping the conductive fiber and bending and folding together, and the bending area of ​​the static charge removal component is an arc surface;

[0015] The radial outer side surface of the installation groove is the groove bottom, and is an arc surface; the metal fixing piece abuts against the groove bottom of the installation groove.

[0016] In one embodiment, a boss is provided on the groove wall of the mounting groove;

[0017] The radial inner side of the metal fixing piece abuts against the boss.

[0018] In one embodiment, the metal fixing piece is a circumferentially closed structure or a circumferentially opened structure.

[0019] In one embodiment, the shaft current conductive brush device further comprises: a cover body, wherein the cover body covers the first opening on at least one side of the end surface.

[0020] In one embodiment, the mounting groove passes through the ring body along the axial direction of the ring body; the mounting groove has two first openings, which are respectively located on different end faces of the ring body; the static charge removal component passes through the mounting groove, and the two ends of the conductive fiber respectively extend from the two first openings of the mounting groove and extend radially by bending.

[0021] In one embodiment, the static charge removal component further includes a metal fixing member for clamping the conductive fiber; the metal fixing member is inserted into the mounting groove.

[0022] In one embodiment, the conductive fiber has a middle section located in the installation groove, a pair of bent sections connected to the middle section, and a pair of extension sections respectively extended from the pair of bent sections; the extension sections extend out of the boundary of the end surface and are located in the area surrounded by the ring body;

[0023] The shaft current conductive brush device further comprises: a cover body, which covers the first openings on the two end surfaces and presses the bent section.

[0024] In one embodiment, the static charge removal component is interference fit with the mounting groove.

[0025] The embodiment of the utility model further provides a motor, comprising:

[0026] Motor body;

[0027] And the shaft current conductive brush device as described in any one of the above items, wherein the shaft current conductive brush device is fixedly sleeved on the shaft of the motor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0029] Figure 1 It is a structural schematic diagram of an axial current conductive brush device according to a first embodiment of the utility model;

[0030] Figure 2 It is a partial enlarged view of the axial current conductive brush device according to the first embodiment of the utility model;

[0031] Figure 3 It is a structural schematic diagram of the cover body covering one end surface of the ring body according to the first embodiment of the utility model;

[0032] Figure 4It is a schematic diagram of the structure of the ring body according to the first embodiment of the utility model;

[0033] Figure 5 It is a schematic diagram of the structure of the static charge removal component in the first embodiment of the utility model;

[0034] Figure 6 is a cross-sectional view of a straight conductive fiber placed in a straight metal fixture according to the first embodiment of the utility model;

[0035] Figure 7 It is a cross-sectional view of the metal fixing piece when it contracts and clamps the conductive fiber according to the first embodiment of the utility model;

[0036] Figure 8 It is a schematic structural diagram of the metal fixing piece when it contracts and clamps the conductive fiber according to the first embodiment of the utility model;

[0037] Fig. 9 is a cross-sectional view of a static charge removal assembly according to a first embodiment of the utility model;

[0038] Fig.10 It is a structural schematic diagram of an axial current conductive brush device according to a second embodiment of the utility model;

[0039] Fig.11 It is a structural schematic diagram of a ring body according to the second embodiment of the utility model;

[0040] Fig.12 It is a schematic structural diagram of a static charge removal component according to a second embodiment of the utility model;

[0041] Description of the drawings: 100, axial current conductive brush device; 1, ring body; 11, inner ring surface; 12, outer ring surface; 13, end surface; 2, static charge removal component; 21, conductive fiber; 22, metal fixing piece; 3, mounting groove; 31, outlet; 32, first opening; 33, groove bottom; 34, boss; 301, first groove; 302, second groove; 4, cover body; 5, middle piece; 200, axial current conductive brush device; 6, ring body; 61, inner ring surface; 63, end surface; 7, static charge removal component; 71, conductive fiber; 711, bending section; 712, middle section; 713, extension section; 72, metal fixing piece; 8, mounting groove; 82, first opening; 9, cover body; DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, each embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in each embodiment of the utility model, many technical details are proposed in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented.

[0043] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0044] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0045] The following will be combined with the accompanying drawings to describe the various embodiments of the present invention in detail, so as to more clearly understand the purpose, characteristics and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0046] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0047] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0048] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0049] Embodiments of the present invention are described below with reference to the accompanying drawings.

[0050] One embodiment of the utility model discloses an axial current conductive brush device. Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the axial current conductive brush device 100 includes: a ring body 1 and a plurality of static charge removal components 2. A plurality of mounting grooves 3 arranged along the circumferential direction are provided on the end face 13 on the ring body 1, and the mounting groove 3 has an outlet 31 located on the inner ring surface 11 of the ring body 1 and a first opening 32 located on the end face 13 on at least one side of the ring body 1, and the first opening 32 extends to the inner ring surface 11 of the ring body 1. Each static charge removal component 2 is installed in the mounting groove 3 along the first opening 32, and the conductive fiber 21 of the static charge removal component 2 extends to the area surrounded by the ring body 1. It can be understood that one or more static charge removal components 2 can be installed in one mounting groove 3; a plurality of mounting grooves 3 are provided on the ring body 1, and static charge removal components 2 can be installed in some mounting grooves 3 according to actual needs, and not installed in others.

[0051] It is not difficult to find from the above content that, since the static charge removal component 2 is installed in the installation groove 3 along the first opening 32, the first opening 32 is located at the end face 13 of the ring body 1 and will not be limited by the interference of the inner ring surface 11 of the ring body 1, so that the static charge removal component 2 is easy to install in the installation groove 3, and the installation is convenient, and it is easy to realize automatic installation. In addition, a plurality of circumferentially arranged installation grooves 3 are provided, so that each installation groove 3 is installed with a static charge removal component 2, that is, each installation groove 3 is concentrated and inserted with conductive fibers 21, which ensures that more dense conductive fibers 21 can be distributed on the circumference compared with the prior art, and solves the problem that the prior art is limited by the laminated conductive fibers 21 being too thin, or the ring body 1 being too thick due to multi-layer splicing. Therefore, the axial dimension of the axial current conductive brush device 100 in this application will not be too large, and can meet the application conditions with large axial current and axial space limitation.

[0052] Furthermore, if Figure 4 As shown, the installation groove 3 includes: a first groove 301 and a second groove 302, the first groove 301 and the second groove 302 are arranged at intervals on the ring body 1, and the first opening 32 of the first groove 301 and the first opening 32 of the second groove 302 are respectively located on different end surfaces 13 of the ring body 1. Thus, the gap between the single rooms of the static charge removal component 2 on the other side can be compensated, so that the conductive fibers 21 are closely and orderly arranged on the circumference, and the density is improved.

[0053] Furthermore, if Figure 4 As shown, there are a plurality of first grooves 301, which are evenly distributed along the circumference. There are a plurality of second grooves 302, which are evenly distributed along the circumference.

[0054] In other embodiments, only one end surface 13 may have the first opening 32, while the other end surface 13 may not have the first opening 32. Alternatively, the mounting groove 3 directly penetrates the ring body 1 in the axial direction, that is, penetrates the ring body 1 in the width direction of the ring body 1.

[0055] Furthermore, the static charge removal component 2 is interference fit with the mounting groove 3 .

[0056] Furthermore, if Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the static charge removal component 2 further includes a metal fixing member 22 for clamping the conductive fiber 21. The metal fixing member 22 can be copper or aluminum.

[0057] Specifically, Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the conductive fiber 21 passes through the metal fixing member 22, and the static charge removal component 2 is formed by the metal fixing member 22 clamping the conductive fiber 21 and bending and folding together, and the bending area of ​​the static charge removal component 2 is an arc surface. The radial outer side surface of the installation groove 3 is the groove bottom 33, which is an arc surface. The metal fixing member 22 is against the groove bottom 33 of the installation groove 3, so that the metal fixing member 22 clamps the conductive fiber 21 and fixes it in the installation groove 3. When preparing the static charge removal component 2, as shown in FIG. Figure 6 The metal fixing member 22 is not bent into a straight shape, and the conductive fibers 21 are not bent into a straight shape. They are evenly laid horizontally in the hole of the metal fixing member 22 along the length direction of the metal fixing member 22. The conductive fibers 21 extend from both ends of the metal fixing member 22. Preferably, the conductive fibers 21 extending from both ends of the metal fixing member 22 have the same length. Figure 7 and Figure 8 As shown in the figure, the metal fixing piece 22 is compressed and deformed to clamp the conductive fiber 21 to form the middle piece 5, and then folded symmetrically along the center line of the metal fixing piece 22 to form Fig. 9 The structure makes the conductive fibers 21 stacked into two layers. The bending of the metal fixing piece 22 increases the fixing strength of the conductive fibers 21. The conductive fibers 21 folded into a symmetrical form can also effectively prevent the conductive fibers 21 from falling off. The bent portion of the metal fixing piece 22 is an arc surface and also matches the arc bottom of the groove bottom 33, so that the bent metal fixing piece 22 matches the installation groove 3 and has an interference fit with the installation groove 3. In order to ensure the conductive performance between the conductive fibers 21 and between the conductive fibers 21 and the metal fixing piece 22, it is necessary to apply conductive glue to the clamping part of the conductive fibers 21, which not only ensures the conductive performance but also enhances the fixing strength between the conductive fibers 21.

[0058] In addition, the metal fixing member 22 is a circumferentially closed structure or a circumferentially open structure. The metal fixing member 22 is a circumferentially closed structure, that is, a hollow column with two ends open. The metal fixing member 22 is a circumferentially open structure similar to a metal clip.

[0059] Further, Figure 2 and Figure 4 As shown, a boss 34 is provided on the groove wall of the installation groove 3. The radial inner side of the metal fixing member 22 abuts against the boss 34, thereby realizing the radial positioning of the static charge removal component 2.

[0060] in addition, Figure 1 and Figure 3 As shown, the shaft current conductive brush device 100 also includes: a cover body 4, and the cover body 4 covers the first opening 32 on one end face 13. The cover body 4 and the ring body 1 can be realized by interference connection, conductive metal glue bonding, screw connection, riveting, etc. The cover body 4 covers the outer ring surface 12 and extends to cover the first opening 32 on one end face 13, thereby further positioning the static charge removal component 2. The shaft current conductive brush device 100 is installed on the motor body, the first opening 32 on one end face 13 is covered by the cover body 4, and the static charge removal component 2 in the first opening 32 on the other end face 13 is limited by the motor body. It can be understood that in other embodiments, the cover body 4 can cover the first openings 32 on both end faces 13, or be set according to the actual opening of the first opening 32 on the end face 13 of the ring body 1, and the cover body 4 can cover the outer ring surface 12 or not.

[0061] The second embodiment of the present invention relates to a method for installing an axial current conductive brush device 100. The axial current conductive brush device 100 in the first embodiment is installed, and the installation method includes the following steps:

[0062] Step 100, providing Figure 4 Ring 1 and Figure 5 The static charge removal component 2;

[0063] Step 200 , insert each static charge removal component 2 into the installation groove 3 from the first opening 32 , and the end of the conductive fiber 21 extends from the outlet 31 into the area surrounded by the ring body 1 .

[0064] Further, providing the static charge removal component 2 comprises the following steps:

[0065] Step 101, providing a straight metal fixing member 22;

[0066] Step 102: Lay the conductive fiber 21 in the metal fixing member 22 along the length direction of the metal fixing member 22, and the conductive fiber 21 extends from both ends of the metal fixing member 22. Figure 6When the conductive fibers 21 are laid in the metal fixing member 22, they can be laid evenly and the lengths extending from both ends of the metal fixing member 22 are equal. Conductive glue is applied to the part where the conductive fibers 21 are clamped by the metal fixing member 22, which not only ensures the conductive performance but also enhances the fixing strength between the conductive fibers 21.

[0067] Step 103, compress and deform the metal fixing member 22 to clamp the conductive fiber 21 to form the intermediate member 5, such as Figure 7 and Figure 8 shown.

[0068] Step 104, symmetrically bend and fold the middle piece 5 to form the static charge removal component 2. The middle piece 5 is symmetrically folded along the center line of the metal fixing piece 22 to form Fig. 9 The conductive fibers 21 are stacked into two layers, and the metal fixing member 22 is bent to increase the fixing strength of the conductive fibers 21. The conductive fibers 21 are folded into a symmetrical form to effectively prevent the conductive fibers 21 from falling off.

[0069] Since the second embodiment corresponds to the present embodiment, the present embodiment can be implemented in conjunction with the second embodiment. The relevant technical details mentioned in the second embodiment are still valid in the present embodiment, and the technical effects that can be achieved in the second embodiment can also be achieved in the present embodiment. In order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in the present embodiment can also be applied in the second embodiment.

[0070] The third embodiment of the present utility model relates to an axial current conductive brush device 200. Fig.10 , Fig.11 and Fig.12 As shown, the shaft current conductive brush device 200 includes: a ring body 6 and a plurality of static charge removal components 7. A plurality of mounting grooves 8 arranged along the circumferential direction are provided on the end surface 63 of the ring body 6, and the mounting grooves 8 penetrate the ring body 6. The mounting groove 8 has two first openings 82, which are respectively located on the two end surfaces 63. The static charge removal component 7 penetrates the mounting groove 8, and the conductive fibers 71 extend from the two first openings 82 and radially bend to extend toward the direction of the area formed by the ring body 6, and the conductive fibers 71 partially extend into the area formed by the ring body 6.

[0071] During installation, the ring body 6 and the static charge removal components 7 are first provided. Then, each static charge removal component 7 is inserted into the installation groove 8 from the first opening 82, and the conductive fibers 71 are radially extended toward the area surrounded by the ring body 6.

[0072] like Fig.10 , Fig.11 and Fig.12As shown, since the static charge removal component 7 is installed in the installation groove 8 along the first opening 82, the first opening 82 is located at the end face 63 of the ring body 6 and will not be limited by the interference of the inner ring surface 71 of the ring body 6, so that the static charge removal component 7 is easy to install in the installation groove 8, and the installation is convenient, and it is easy to realize automatic installation. In addition, a plurality of circumferentially arranged installation grooves 8 are provided, so that each installation groove 8 is installed with a static charge removal component 7, that is, each installation groove 8 is inserted with conductive fibers 71 in a concentrated manner, which ensures that more dense conductive fibers 71 can be distributed on the circumference compared with the prior art, and solves the problem that the prior art is limited by the laminated conductive fibers 71 being too thin, or the ring body 6 being too thick due to multi-layer splicing. Therefore, the axial dimension of the axial current conductive brush device 200 in the present application will not be too large, and can meet the application conditions with large axial current and axial space restrictions.

[0073] Furthermore, the static charge removal component 7 is interference fit with the mounting groove 8 .

[0074] In addition, if Fig.10 , Fig.11 and Fig.12 As shown, the static charge removal component 7 also includes a metal fixing 72 for clamping the conductive fiber 71. The metal fixing 72 is inserted into the mounting groove 8. During installation, the conductive fiber 71 is first installed in the metal fixing 72, and the structure of the metal fixing 72 may be the same as or similar to that in the first embodiment. In this embodiment, the structure of the static charge removal component 7 before being installed in the ring body 6 is different from that in the first embodiment. In this embodiment, the metal fixing 72 does not bend after fixing the conductive fiber 71, and passes through the mounting groove 8 in a straight state. The two ends of the conductive fiber 71 are located outside the mounting groove 8, and the metal fixing 72 is located inside the mounting groove 8. After the static charge removal component 7 passes through the mounting groove 8, the conductive fiber 71 exposed outside the mounting groove 8 is bent.

[0075] Specifically, Fig.10 and Fig.12 As shown, the conductive fiber 71 has a middle section 712 located in the installation groove 8, a pair of bent sections 711 connected to the middle section 712, and a pair of extension sections 713 respectively extended from the pair of bent sections 711. The extension section 713 extends out of the boundary of the end surface 63 and is located in the area surrounded by the ring body 6. The extension section 713 is partially located in the area surrounded by the ring body 6, that is, the extension section 713 is partially within the height formed by the inner ring surface 71, and partially outside the inner ring surface 71. The area surrounded by the ring body 6 may not be limited to the area directly facing the inner ring surface 71.

[0076] like Fig.10As shown, the shaft current conductive brush device 200 further includes: a cover body 9, which covers the first openings 82 on the two end faces 63 and presses the bent section. This achieves the positioning and fixation of the conductive fiber 71. The cover body 9 can be two, one fixed to each end face 63, or one covered on the ring body 6, bent to the two end faces 63 of the ring body 6 to cover the first opening 82 and press the bent section.

[0077] The third embodiment of the utility model relates to a motor, which comprises: a motor body and the shaft current conductive brush device in the first embodiment or the third embodiment, wherein the shaft current conductive brush device is fixedly sleeved on the shaft of the motor body.

[0078] It is not difficult to find that this embodiment is a system embodiment corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[0079] Preferred embodiments of the present invention have been described in detail above, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0080] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0081] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An axial current conductive brush device, characterized in that: include: A ring body, wherein at least one end surface of the ring body is provided with a plurality of mounting grooves arranged along the circumferential direction, and the mounting groove has a first opening located on the end surface of at least one side of the ring body, and A plurality of static charge removal components are each installed in the installation groove along the first opening, and the conductive fibers of the static charge removal components radially extend toward the area surrounded by the ring body, and the conductive fibers at least partially extend into the area surrounded by the ring body.

2. The shaft current conductive brush device according to claim 1, characterized in that: The mounting groove also has an outlet located on the inner ring surface of the ring body, and the first opening extends to the inner ring surface of the ring body and is connected to the outlet.

3. The shaft current conductive brush device according to claim 2, characterized in that: The installation groove comprises: a first groove and a second groove, the first groove and the second groove are arranged at intervals and opened on the ring body, and a first opening of the first groove and a first opening of the second groove are respectively located on different end surfaces of the ring body.

4. The shaft current conductive brush device according to claim 3, characterized in that: There are a plurality of first grooves, which are evenly distributed along the circumference; and / or There are a plurality of second grooves, which are evenly distributed along the circumferential direction.

5. The shaft current conductive brush device according to claim 2, characterized in that: The static charge removal component also includes a metal fixing member for clamping the conductive fiber.

6. The shaft current conductive brush device according to claim 5, characterized in that: The conductive fiber penetrates the metal fixing piece, and the static charge removal component is formed by the metal fixing piece clamping the conductive fiber and bending and folding together, and the bending area of ​​the static charge removal component is an arc surface; The radial outer side surface of the installation groove is the groove bottom, and is an arc surface; the metal fixing piece abuts against the groove bottom of the installation groove.

7. The shaft current conductive brush device according to claim 5, characterized in that: A boss is provided on the groove wall of the installation groove; The radial inner side of the metal fixing piece abuts against the boss.

8. The shaft current conductive brush device according to claim 5, characterized in that: The metal fixing piece is a circumferentially closed structure or a circumferentially opened structure.

9. The shaft current conductive brush device according to claim 2, characterized in that: The shaft current conductive brush device further comprises: a cover body, wherein the cover body covers a first opening on at least one side of the end surface.

10. The shaft current conductive brush device according to claim 1, characterized in that: The mounting groove penetrates the ring body along the axial direction of the ring body; the mounting groove has two first openings, which are respectively located on different end faces of the ring body; the static charge removal component penetrates the mounting groove, and the two ends of the conductive fiber respectively extend from the two first openings of the mounting groove and extend radially by bending.

11. The shaft current conductive brush device according to claim 10, characterized in that: The static charge removal component also includes a metal fixing piece for clamping the conductive fiber; the metal fixing piece is inserted into the installation groove.

12. The shaft current conductive brush device according to claim 1, characterized in that: The conductive fiber comprises a middle section located in the installation groove, a pair of bending sections connected to the middle section, and a pair of extending sections respectively extending from the pair of bending sections; The extension section extends beyond the boundary of the end surface and is located in the area surrounded by the ring body; The shaft current conductive brush device further comprises: a cover body, which covers the first openings on the two end surfaces and presses the bent section.

13. The shaft current conductive brush device according to claim 1, characterized in that: The static charge removal component is interference-fitted with the mounting groove.

14. A motor, characterized in that: include: Motor body; And the shaft current conductive brush device as described in any one of claims 1 to 13, wherein the shaft current conductive brush device is fixedly sleeved on the shaft of the motor body.

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