Conductive structure, shaft end assembly, motor and vehicle

Abstract

The utility model provides a conductive structure, a shaft end assembly, a motor and a vehicle, the conductive structure is used for being assembled between a motor shaft and a motor shell, and the conductive structure comprises a conductive bearing and a conductive assembly; an inner ring of the conductive bearing is in interference fit with the motor shaft, and an outer ring of the conductive bearing is in clearance fit with the inner wall of the motor shell; the conductive assembly is assembled on the inner wall of the motor shell in the radial direction of the motor shaft and abuts against the conductive bearing. According to the utility model, a gap exists between the conductive bearing and the mounting hole of the motor shell, and the conductive bearing is not in direct contact with the motor shell, so that the risk that the conductive bearing is pressed and damaged is avoided, and meanwhile, the requirement on the hole position precision of the mounting hole of the motor shell is not high. The conductive assembly is arranged in the gap between the conductive bearing and the motor shell, so that voltage on the motor shaft is conducted to the motor shell through the conductive bearing and the conductive assembly in sequence, and the situation that electricity generated when the motor shaft works is conducted to the supporting bearing to cause electrocorrosion failure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive structures, in particular to a conductive structure, a shaft end assembly, a motor and a vehicle. Background Art

[0002] The existing conductive structure includes a conductive bearing, a conductive column, an elastic conductive member and a grounding bracket. The conductive column is press-fitted with the inner ring of the conductive bearing with an interference fit, the outer ring of the conductive bearing is in interference fit with the motor housing, the conductive column is connected to the motor housing through the elastic conductive member, and at the same time, the conductive column is fixed on the motor housing through the grounding bracket. Such a conductive structure has more components and higher costs. There is a risk of damaging the conductive bearing during the press-fitting process; the centering of the conductive column and the assembly process of the grounding bracket and the motor housing are both relatively complex during the assembly process, reducing the assembly efficiency. Summary of the Utility Model

[0003] The utility model provides a conductive structure, a shaft end assembly, a motor and a vehicle to solve the problem of poor assembly efficiency of the existing conductive structure.

[0004] A conductive structure for assembling between a motor shaft and a motor housing, comprising a conductive bearing and a conductive assembly;

[0005] The inner ring of the conductive bearing is in interference fit with the motor shaft, and the outer ring of the conductive bearing is in clearance fit with the inner wall of the motor housing;

[0006] The conductive assembly is assembled on the inner wall of the motor housing along the radial direction of the motor shaft and abuts against the conductive bearing.

[0007] Preferably, an installation groove is provided on the inner wall of the motor housing and arranged along the radial direction of the motor shaft;

[0008] The first end of the conductive assembly is assembled in the installation groove, and the second end of the conductive assembly protrudes from the installation groove and abuts against the conductive bearing.

[0009] Preferably, the conductive assembly includes an elastic member and a conductive member;

[0010] The elastic member is assembled in the installation groove, the first end of the elastic member is connected to the inner wall of the installation groove, the second end of the elastic member is connected to the conductive member, and the conductive member protrudes from the installation groove and abuts against the conductive bearing;

[0011] The elastic member is a conductive elastic member, and the conductive member is connected to the inner wall of the motor housing or the conductive member is not connected to the inner wall of the motor housing;

[0012] Alternatively, the elastic member is a non-conductive elastic member, and the conductive member is connected to the inner wall of the motor housing.

[0013] Preferably, the surface of the conductive member in contact with the conductive bearing is an arc surface.

[0014] Preferably, the conductive member is a spherical conductive member.

[0015] An end - shaft assembly includes the conductive structure as described above, and further includes a motor shaft and a motor housing;

[0016] The motor shaft is installed in the installation hole of the motor housing;

[0017] The inner ring of the conductive bearing is in interference fit with the motor shaft, and the outer ring of the conductive bearing is in clearance fit with the inner wall of the motor housing;

[0018] The conductive assembly is assembled on the inner wall of the motor housing along the radial direction of the motor shaft and abuts against the conductive bearing.

[0019] Preferably, the end - shaft assembly further includes a support bearing and a protective cover;

[0020] The support bearing is assembled on the motor shaft and is in interference fit with the motor housing;

[0021] The protective cover is fixed to one end of the motor housing away from the support bearing.

[0022] Preferably, the motor housing includes a first annular portion, a second annular portion, and a third annular portion arranged in sequence along the axial direction of the motor shaft;

[0023] The inner diameter of the second annular portion is smaller than the inner diameters of the first annular portion and the third annular portion;

[0024] The support bearing is in interference fit with the first annular portion, and there is a gap between the conductive bearing and the inner wall of the second annular portion;

[0025] The conductive assembly is assembled on the inner wall of the second annular portion along the radial direction of the motor shaft;

[0026] The protective cover is fixed to the third annular portion.

[0027] A motor includes the end - shaft assembly as described above.

[0028] A vehicle includes the motor as described above.

[0029] The conductive structure provided by the embodiment of the present utility model includes a conductive bearing and a conductive component. The inner ring of the conductive bearing is in interference fit with the motor shaft, and the outer ring of the conductive bearing is in clearance fit with the inner wall of the motor housing. Specifically, the outer ring of the conductive bearing is in clearance fit with the hole wall of the mounting hole of the motor housing. Such an assembly has low requirements for the centering of the conductive bearing, the assembly process is simple, and no additional centering tooling is required. Compared with the existing assembly method of the conductive bearing, there is a gap between the conductive bearing and the mounting hole of the motor housing in this example, and it does not directly contact the motor housing, so there is no risk of the conductive bearing being damaged by pressing. At the same time, the requirement for the hole position accuracy of the mounting hole of the motor housing is not high. The conductive component is assembled on the inner wall of the motor housing along the radial direction of the motor shaft and abuts against the conductive bearing. Specifically, the conductive component is arranged in the gap between the conductive bearing and the motor housing, so as to realize that the voltage on the motor shaft is conducted to the motor housing through the conductive bearing and the conductive component in sequence, avoiding the electric corrosion failure caused by the electricity generated when the motor shaft works being conducted to the support bearing. Compared with the existing conductive structure, the conductive structure in this example requires fewer components, has a lower cost, higher assembly efficiency, and high conductive reliability. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a cross-sectional view of the shaft end assembly in an embodiment of the present utility model;

[0032] Figure 2 is Figure 1 an enlarged view of a part of

[0033] Wherein, 1, motor shaft; 2, motor housing; 21, first annular part; 22, second annular part; 23, third annular part; 24, second groove; 25, third groove; 3, conductive bearing; 4, conductive component; 41, elastic part; 42, conductive part; 5, mounting groove; 6, support bearing; 7, protective cover; 8, first groove; 9, motor rotor. Detailed Embodiments

[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0035] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] An embodiment of the present utility model provides a conductive structure. Referring to Figure 1 and Figure 2 , this conductive structure is used to be assembled between the motor shaft 1 and the motor housing 2, and includes a conductive bearing 3 and a conductive component 4; the inner ring of the conductive bearing 3 is in interference fit with the motor shaft 1, and the outer ring of the conductive bearing 3 is in clearance fit with the inner wall of the motor housing 2; the conductive component 4 is assembled on the inner wall of the motor housing 2 along the radial direction of the motor shaft 1 and abuts against the conductive bearing 3.

[0038] As an example, during assembly, there are mounting holes in the motor housing 2. The motor shaft 1 is installed in the mounting holes of the motor housing 2 through a support bearing 6. When the motor shaft 1 operates, it generates voltage. If not discharged in time, it will cause the support bearing 6 to fail due to electrocorrosion. The conductive structure includes a conductive bearing 3 and a conductive component 4. The inner ring of the conductive bearing 3 is in interference fit with the motor shaft 1, and the outer ring of the conductive bearing 3 is in clearance fit with the inner wall of the motor housing 2. Specifically, the outer ring of the conductive bearing 3 is in clearance fit with the wall of the mounting hole of the motor housing 2. Such an assembly has low requirements for the centering of the conductive bearing 3, the assembly process is simple, and no additional centering tooling is required. Compared with the existing assembly method of the conductive bearing 3, there is a gap between the conductive bearing 3 and the mounting hole of the motor housing 2 in this example, and it does not directly contact the motor housing 2, so there is no risk of the conductive bearing 3 being damaged by pressing. At the same time, the requirement for the hole position accuracy of the mounting hole of the motor housing 2 is not high. The conductive component 4 is assembled on the inner wall of the motor housing 2 along the radial direction of the motor shaft 1 and abuts against the conductive bearing 3. Specifically, the conductive component 4 is arranged in the gap between the conductive bearing 3 and the motor housing 2, so as to conduct the voltage on the motor shaft 1 to the motor housing 2 through the conductive bearing 3 and the conductive component 4 in sequence, avoiding the electrocorrosion failure of the support bearing 6 caused by the electricity generated when the motor shaft 1 operates. Compared with the existing conductive structure, the conductive structure in this example requires fewer components, has lower costs, higher assembly efficiency, and high conductive reliability.

[0039] In one embodiment, referring to Figure 1 and Figure 2 , the inner wall of the motor housing 2 is provided with a mounting groove 5 arranged along the radial direction of the motor shaft 1. The first end of the conductive component 4 is assembled in the mounting groove 5, and the second end of the conductive component 4 protrudes from the mounting groove 5 and abuts against the conductive bearing 3.

[0040] As an example, the inner wall of the motor housing 2 is provided with a mounting groove 5 arranged along the radial direction of the motor shaft 1. During installation, the first end of the conductive component 4 is assembled in the mounting groove 5, and the second end of the conductive component 4 protrudes from the mounting groove 5 and abuts against the conductive bearing 3. In this way, the conductive component 4 can contact the conductive bearing 3 along the radial direction, facilitating the conduction of the voltage on the motor shaft 1 to the motor housing 2 through the conductive bearing 3 and the conductive component 4 in sequence, avoiding the electrocorrosion failure of the support bearing 6 caused by the electricity generated when the motor shaft 1 operates; it can also limit the axial position of the conductive component 4 to prevent it from shifting and affecting the conductive effect.

[0041] In one embodiment, referring to Figure 1, the conductive component 4 includes an elastic member 41 and a conductive member 42; the elastic member 41 is assembled in the installation groove 5, the first end of the elastic member 41 is in contact with the inner wall of the installation groove 5, and the second end of the elastic member 41 is in contact with the conductive member 42; the conductive member 42 protrudes from the installation groove 5 and abuts against the conductive bearing 3; the elastic member 41 is a conductive elastic member, and the conductive member 42 is in contact with the inner wall of the motor housing 2 or the conductive member 42 is not in contact with the inner wall of the motor housing 2; or, the elastic member 41 is a non-conductive elastic member, and the conductive member 42 is in contact with the inner wall of the motor housing 2.

[0042] As an example, the structure of the conductive component 4 is introduced, specifically including an elastic member 41 and a conductive member 42; the elastic member 41 is assembled in the installation groove 5, the first end of the elastic member 41 is in contact with the inner wall of the installation groove 5, and the second end of the elastic member 41 is in contact with the conductive member 42; the conductive member 42 protrudes from the installation groove 5 and abuts against the conductive bearing 3; with such a setting, by using the elasticity of the elastic member 41, the conductive member 42 can always be in contact with the conductive bearing 3 and can move in the installation groove 5 along the radial direction of the motor shaft 1, avoiding excessive pressing force being applied to the conductive bearing 3 and causing damage to the conductive bearing 3; in addition, the elastic member 41 also has a certain pre-tightening force, and the pre-tightening force of the elastic member 41 can be used to pre-tighten and fix the conductive bearing 3, providing convenience for the installation of the conductive bearing 3. By using the conductivity of the conductive member 42, it is convenient to conduct the voltage on the motor shaft 1 to the motor housing 2 through the conductive bearing 3 and the conductive member 42 in sequence.

[0043] In this example, when the elastic member 41 is a conductive elastic member, both the elastic member 41 and the conductive member 42 can achieve the conductive function, and two schemes can be designed to conduct the voltage on the motor shaft 1 to the motor housing 2 through the conductive bearing 3. The first scheme is that the conductive member 42 is in contact with the inner wall of the motor housing 2. The conductive member 42 can not only conduct the voltage to the motor housing 2 through the elastic member 41, but also conduct electricity directly through itself; the second scheme is that the conductive member 42 is not in contact with the inner wall of the motor housing 2, and the conductive member 42 conducts the voltage to the motor housing 2 through the elastic member 41. When the elastic member 41 is a non-conductive elastic member, the conductive member 42 is in contact with the inner wall of the motor housing 2 and conducts the voltage to the motor housing 2 through itself. In addition, the elastic member 41 and the conductive member 42 can be of an integral structure, which can reduce costs and is also conducive to control.

[0044] In an embodiment, referring to Figure 2 , the surface of the conductive member 42 in contact with the conductive bearing 3 is an arc surface.

[0045] As an example, the surface of the conductive member 42 in contact with the conductive bearing 3 is an arc surface. In this way, the connection between the conductive member 42 and the conductive bearing 3 is a point connection, and the use of point connection can improve the conductive safety. At the same time, by contacting the conductive bearing 3 through the arc surface, the wear on the outer ring of the conductive bearing 3 can also be reduced to extend the service life of the conductive bearing 3.

[0046] In one embodiment, referring to Figure 2 , the conductive member 42 is a spherical conductive member.

[0047] As an example, the conductive member 42 is a spherical conductive member, and the spherical conductive member includes but is not limited to a steel ball.

[0048] The embodiment of the present utility model provides a shaft end assembly, referring to Figure 1 and Figure 2 , including a conductive structure, and further including a motor shaft 1 and a motor housing 2; the motor shaft 1 is installed in the installation hole of the motor housing 2; the inner ring of the conductive bearing 3 is in interference fit with the motor shaft 1, and the outer ring of the conductive bearing 3 is in clearance fit with the inner wall of the motor housing 2; the conductive assembly 4 is assembled on the inner wall of the motor housing 2 along the radial direction of the motor shaft 1 and abuts against the conductive bearing 3.

[0049] As an example, the shaft end assembly includes a conductive structure, a motor shaft 1 and a motor housing 2. During assembly, an installation hole is provided in the motor housing 2, and the motor shaft 1 is installed in the installation hole of the motor housing 2 through a support bearing 6. A motor rotor 9 is assembled on the motor shaft 1. When the motor shaft 1 works, voltage will be generated. If it is not discharged in time, it will cause the support bearing 6 to fail due to electrocorrosion. The conductive structure includes a conductive bearing 3 and a conductive assembly 4. The inner ring of the conductive bearing 3 is in interference fit with the motor shaft 1, and the outer ring of the conductive bearing 3 is in clearance fit with the inner wall of the motor housing 2. Specifically, the outer ring of the conductive bearing 3 is in clearance fit with the hole wall of the installation hole of the motor housing 2. Such assembly has low requirements for the centering of the conductive bearing 3, the assembly process is simple, and no additional centering tooling is required. Compared with the existing assembly method of the conductive bearing 3, there is a gap between the conductive bearing 3 and the installation hole of the motor housing 2 in this example, and it does not directly contact the motor housing 2, so there is no risk of the conductive bearing 3 being damaged by pressure. At the same time, the requirement for the hole position accuracy of the installation hole of the motor housing 2 is not high. The conductive assembly 4 is assembled on the inner wall of the motor housing 2 along the radial direction of the motor shaft 1 and abuts against the conductive bearing 3. Specifically, the conductive assembly 4 is arranged in the gap between the conductive bearing 3 and the motor housing 2, so as to realize that the voltage on the motor shaft 1 is conducted to the motor housing 2 through the conductive bearing 3 and the conductive assembly 4 in sequence, avoiding the electric conduction generated when the motor shaft 1 works from reaching the support bearing 6 and causing electrocorrosion failure. Compared with the existing conductive structure, the conductive structure in this example requires fewer components, has lower cost, higher assembly efficiency, and high conductive reliability.

[0050] In one embodiment, referring to Figure 1 , the shaft end assembly further includes a support bearing 6 and a protective cover 7; the support bearing 6 is assembled on the motor shaft 1 and is in interference fit with the motor housing 2; the protective cover 7 is fixed on one end of the motor housing 2 away from the support bearing 6.

[0051] As an example, it is introduced that the shaft end assembly further includes a support bearing 6 and a protective cover 7; the support bearing 6 is assembled on the motor shaft 1 and is in interference fit with the motor housing 2, facilitating the installation of the motor shaft 1 in the motor housing 2 and ensuring the smooth operation of the motor shaft 1. The protective cover 7 is fixed on the motor housing 2 and is used to limit and protect the conductive structure to avoid damage to the conductive structure; on the side of the protective cover 7 facing the motor housing 2, there is a first groove 8, which can achieve the function of weight reduction and material saving during the processing and manufacturing of the protective cover 7. Among them, the diameter of the first groove 8 is larger than the diameter of the mounting hole of the motor housing 2, and a receiving space is formed between the first groove 8 and the motor housing 2, where a buffer layer can be filled in the receiving space to provide buffer protection for the conductive structure; or a seal can be filled in the receiving space to strengthen the sealing performance of the connection between the protective cover 7 and the motor housing 2.

[0052] In one embodiment, referring to Figure 1 and Figure 2 , the motor housing 2 includes a first annular portion 21, a second annular portion 22, and a third annular portion 23 that are sequentially arranged along the axial direction of the motor shaft 1; the inner diameter of the second annular portion 22 is smaller than the inner diameters of the first annular portion 21 and the third annular portion 23; the support bearing 6 is in interference fit with the first annular portion 21, and there is a gap between the conductive bearing 3 and the inner wall of the second annular portion 22; the conductive component 4 is assembled on the inner wall of the second annular portion 22 along the radial direction of the motor shaft 1; the protective cover 7 is fixed on the third annular portion 23.

[0053] As an example, the motor housing 2 includes a first annular portion 21, a second annular portion 22, and a third annular portion 23 that are sequentially arranged along the axial direction of the motor shaft 1. The inner diameter of the second annular portion 22 is smaller than the inner diameters of the first annular portion 21 and the third annular portion 23. The third annular portion 23 cooperates with the second annular portion 22 to form an operation space, facilitating the user to install the conductive bearing 3 in the second annular portion 22; the first annular portion 21 cooperates with the second annular portion 22 to form a mounting position for installing the support bearing 6. The support bearing 6 is in interference fit with the first annular portion 21, ensuring the reliable and stable installation of the support bearing 6; there is a gap between the conductive bearing 3 and the inner wall of the second annular portion 22, and the requirement for centering during the assembly process is not high. The assembly process is simple, which is beneficial to the assembly and does not require an additional centering tooling. Compared with the existing assembly method of the conductive bearing 3, in this example, there is a gap between the conductive bearing 3 and the mounting hole of the second annular portion 22, and it does not directly contact the second annular portion 22, so there is no risk of the conductive bearing 3 being damaged by pressure during the assembly process; the conductive component 4 is assembled on the inner wall of the second annular portion 22 along the radial direction of the motor shaft 1. Specifically, there is a mounting groove 5 arranged along the radial direction on the inner wall of the second annular portion 22, and the conductive component 4 is installed in the mounting groove 5 of the second annular portion 22; the protective cover 7 is fixed on the third annular portion 23 and is used to limit and protect the conductive structure to avoid damage to the conductive structure.

[0054] Wherein, one end inner wall of the second annular part 22 close to the first annular part 21 is recessed radially outward to form a second groove 24, and the inner diameter of the second groove 24 is smaller than that of the first annular part 21. In this way, a stepped interval is formed between the inner sides of the first annular part 21 and the second annular part 22, which can reduce the contact area between the support bearing 6 and the second annular part 22 and reduce friction. One end inner wall of the first annular part 21 close to the second annular part 22 is recessed radially outward to form a third groove 25 for installing a gasket connected to the support bearing 6. The inner diameter of the third groove 25 is larger than that of the first annular part 21. A gasket is installed in the third groove 25 to provide an interval for the support bearing 6 and reduce the wear of the second annular part 22 on the support bearing 6.

[0055] An embodiment of the present invention provides a motor, including a shaft end assembly.

[0056] As an example, the shaft end assembly includes a conductive structure, a motor shaft 1 and a motor housing 2. During assembly, an installation hole is provided in the motor housing 2, and the motor shaft 1 is installed in the installation hole of the motor housing 2 through a support bearing 6. A motor rotor 9 is assembled on the motor shaft 1. When the motor shaft 1 works, a voltage will be generated. If it is not discharged in time, it will cause the support bearing 6 to fail due to electro-corrosion. The conductive structure includes a conductive bearing 3 and a conductive component 4. The inner ring of the conductive bearing 3 is in interference fit with the motor shaft 1, and the outer ring of the conductive bearing 3 is in clearance fit with the inner wall of the motor housing 2. Specifically, the outer ring of the conductive bearing 3 is in clearance fit with the hole wall of the installation hole of the motor housing 2. In this way, the requirement for the centering of the conductive bearing 3 during assembly is not high, the assembly process is simple, and no additional centering tooling is required. Compared with the existing assembly method of the conductive bearing 3, there is a gap between the conductive bearing 3 and the installation hole of the motor housing 2 in this example, and it does not directly contact the motor housing 2, so there is no risk of the conductive bearing 3 being damaged by pressing. At the same time, the requirement for the hole position accuracy of the installation hole of the motor housing 2 is not high. The conductive component 4 is assembled on the inner wall of the motor housing 2 along the radial direction of the motor shaft 1 and abuts against the conductive bearing 3. Specifically, the conductive component 4 is arranged in the gap between the conductive bearing 3 and the motor housing 2 to realize guiding the voltage on the motor shaft 1 to the motor housing 2 through the conductive bearing 3 and the conductive component 4 in sequence, and avoid the electric conduction generated when the motor shaft 1 works from reaching the support bearing 6 and causing electro-corrosion failure.

[0057] An embodiment of the present invention provides a vehicle, including a motor.

[0058] As an example, when the motor is used in a vehicle, it can be used in an integrated or distributed electric drive system to prevent the bearing from suffering from electro-corrosion problems. The shaft end assembly includes a conductive structure, a motor shaft 1, and a motor housing 2. During assembly, an installation hole is provided in the motor housing 2. The motor shaft 1 is installed in the installation hole of the motor housing 2 through a support bearing 6. A motor rotor 9 is assembled on the motor shaft 1. When the motor shaft 1 operates, a voltage will be generated. If it is not discharged in time, it will cause the support bearing 6 to fail due to electro-corrosion. The conductive structure includes a conductive bearing 3 and a conductive component 4. The inner ring of the conductive bearing 3 is in interference fit with the motor shaft 1, and the outer ring of the conductive bearing 3 is in clearance fit with the inner wall of the motor housing 2. Specifically, the outer ring of the conductive bearing 3 is in clearance fit with the hole wall of the installation hole of the motor housing 2. Such an assembly has low requirements for the centering of the conductive bearing 3, the assembly process is simple, and no additional centering tooling is required. Compared with the existing assembly method of the conductive bearing 3, there is a gap between the conductive bearing 3 and the installation hole of the motor housing 2 in this example, and it does not directly contact the motor housing 2, so there is no risk of the conductive bearing 3 being damaged by pressing. At the same time, the requirements for the hole position accuracy of the installation hole of the motor housing 2 are not high. The conductive component 4 is assembled on the inner wall of the motor housing 2 along the radial direction of the motor shaft 1 and abuts against the conductive bearing 3. Specifically, the conductive component 4 is arranged in the gap between the conductive bearing 3 and the motor housing 2, so as to realize guiding the voltage on the motor shaft 1 to the motor housing 2 through the conductive bearing 3 and the conductive component 4 in sequence, and avoid the electro-conduction generated when the motor shaft 1 operates from reaching the support bearing 6 and causing electro-corrosion failure.

[0059] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A conductive structure, characterized in that: Used to be assembled between the motor shaft and the motor housing, including a conductive bearing and a conductive component; The inner ring of the conductive bearing is interference-fitted with the motor shaft, and the outer ring of the conductive bearing is clearance-fitted with the inner wall of the motor housing; The inner wall of the motor housing is provided with a mounting groove arranged along the radial direction of the motor shaft; The conductive component comprises an elastic member and a conductive member; The elastic member is assembled in the mounting groove, the first end of the elastic member is connected to the inner wall of the mounting groove, the second end of the elastic member is connected to the conductive member, and the conductive member protrudes from the mounting groove and abuts against the conductive bearing; The elastic member is a conductive elastic member, the conductive member is in contact with the inner wall of the motor housing or the conductive member is not in contact with the inner wall of the motor housing; Alternatively, the elastic member is a non-conductive elastic member, and the conductive member is connected to the inner wall of the motor housing.

2. The conductive structure according to claim 1, characterized in that: The surface of the conductive member abutting against the conductive bearing is an arc-shaped surface.

3. The conductive structure according to claim 1, characterized in that: The conductive member is a spherical conductive member.

4. A shaft end assembly, characterized in that: The conductive structure comprises any one of claims 1 to 3, and further comprises a motor shaft and a motor housing; The motor shaft is installed in the mounting hole of the motor housing; The inner ring of the conductive bearing is interference-fitted with the motor shaft, and the outer ring of the conductive bearing is clearance-fitted with the inner wall of the motor housing; The conductive component is assembled on the inner wall of the motor housing along the radial direction of the motor shaft and abuts against the conductive bearing.

5. The shaft end assembly according to claim 4, characterized in that: The shaft end assembly also includes a support bearing and a protective cover; The support bearing is assembled on the motor shaft and has an interference fit with the motor housing; The protection cover is fixed on an end of the motor housing away from the support bearing.

6. The shaft end assembly according to claim 5, characterized in that: The motor housing comprises a first annular portion, a second annular portion and a third annular portion which are sequentially arranged along the axial direction of the motor shaft; The inner diameter of the second annular portion is smaller than the inner diameter of the first annular portion and the inner diameter of the third annular portion; The support bearing is interference-fitted with the first annular portion, and there is a gap between the conductive bearing and the inner wall of the second annular portion; The conductive component is assembled on the inner wall of the second annular portion along the radial direction of the motor shaft; The protection cover is fixed on the third annular portion.

7. A motor, characterized in that: The invention comprises the shaft end assembly as described in any one of claims 4 to 6.

8. A vehicle, characterized in that: Comprising the motor as claimed in claim 7.

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