Conductive structure, motor and vehicle

Abstract

The utility model discloses a conductive structure, a motor and a vehicle, the conductive structure comprises a conductive main body and a conductive brush, an oil passing path is formed in the conductive main body, the conductive main body comprises an installation part and an insertion part, the projection of the insertion part on a reference surface is located in the projection of the installation part on the reference surface, and the reference surface is perpendicular to the axial direction of the insertion part. An oil receiving groove is formed in the end face, deviating from the insertion portion, of the installation portion, an oil passing channel which is through in the axial direction and communicated with the oil receiving groove is formed in the insertion portion, the oil receiving groove and the oil passing channel jointly form an oil passing path, and the conductive brush is arranged on the conductive body and arranged on the peripheral face of the insertion portion. According to the electric conduction structure, the oil passing oil way is arranged on the electric conduction structure, the electric conduction structure has the oil passing function on the basis of the electric conduction function, the oil passing function and the electric conduction function are integrated on the electric conduction structure, the number of parts can be well reduced, and therefore the installation space and cost can be saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is related to a conductive structure, motor and vehicle. BACKGROUND

[0002] The high pressure oil cooling electric drive will face the motor rotor cooling lubrication problem and bearing electric corrosion problem. In order to solve the above technical problem, currently, the cooling lubricating oil circuit is arranged in the motor to realize the cooling of motor rotor and bearing lubrication, and the carbon brush is used to form the loop between the motor shaft and the shell to release the current at the motor bearing. But the way to solve the above two technical problems in the related art is usually two different structures, that is, the conductive structure and the oil passing structure need to be set simultaneously, resulting in more installation space and high cost. Therefore, it needs to be improved. SUMMARY

[0003] The utility model discloses a conductive structure in the first aspect, the conductive structure has the advantages such as small installation space and low cost.

[0004] According to the conductive structure of the utility model first aspect embodiment, including: conductive main part, the oil passing oil circuit is formed in the conductive main part;Conductive brush, the conductive brush is located on the conductive main part.

[0005] According to the conductive structure of the utility model first aspect embodiment, through setting the oil passing oil circuit on the conductive structure, the conductive structure has the oil passing function on the basis of the conductive function, by integrating the oil passing function and the conductive function on the conductive structure, the number of parts can be reduced, so that the installation space and the cost can be saved.

[0006] According to some embodiments of the utility model, the conductive main part includes a mounting portion and an insertion portion, a projection of the insertion portion on a reference surface is located within a projection of the mounting portion on the reference surface, the reference surface is perpendicular to an axial direction of the insertion portion, and the conductive brush is arranged on an outer circumferential surface of the insertion portion.

[0007] According to some embodiments of the utility model, an end surface of the mounting portion, which faces away from the insertion portion, forms an oil receiving groove, the insertion portion forms an oil passing channel that penetrates in the axial direction and communicates with the oil receiving groove, and the oil receiving groove and the oil passing channel jointly constitute the oil passing oil circuit.

[0008] According to some embodiments of the utility model, the conductive brush is arranged in a plurality of intervals along a circumferential direction and / or an axial direction of the insertion portion.

[0009] According to some embodiments of the utility model, the conductive brush is in a cylindrical bundle shape, and / or in a radial direction of the insertion portion, a length range in which the conductive brush protrudes from the outer circumferential surface of the insertion portion is 1-4 mm.

[0010] The utility model discloses a second aspect proposes a kind of motor.

[0011] According to the motor of the second aspect embodiment of the utility model, including: shell, form oil inlet oil circuit;Motor shaft, pass in the shell and with the shell between being equipped with motor bearing, the motor shaft is hollow structure with conveying oil circuit being formed in inside, the outer peripheral surface of the motor shaft is formed with the oil hole that conveys oil circuit intercommunication;Above-mentioned conductive structure, the conductive main part is connected with the shell and is spaced apart with the motor shaft, the conductive brush is interfered with the motor shaft and contacts, the oil circuit conveys the oil inlet oil circuit and the conveying oil circuit.

[0012] According to the motor of the second aspect embodiment of the utility model, conductive structure has oil-passing function on the basis of conductive function, by integrating oil-passing function and conductive function on conductive structure, the number of parts of motor can be preferably reduced to save installation space, beneficial to reduce the production cost of motor while reducing the size of motor.

[0013] According to some embodiments of the utility model, the axial end surface of the motor shaft close to the oil inlet oil circuit forms the oil inlet that conveys oil circuit intercommunication, part of the conductive main part is inserted into the conveying oil circuit through the oil inlet, the inner peripheral surface of the motor shaft is formed with anti-backflow structure, in the axial direction of the motor shaft, the anti-backflow structure is located at the downstream side of the conductive brush, and the anti-backflow structure is used to block the lubricating oil in the conveying oil circuit from flowing towards the conductive brush.

[0014] According to some embodiments of the utility model, the conveying oil circuit includes first conveying section and second conveying section that are interconnected along the axial direction of the motor shaft, the second conveying section is located on the side of the first conveying section away from the oil inlet, the conductive structure is located on the side of the second conveying section adjacent to the oil inlet, the inner diameter of the first conveying section is smaller than the inner diameter of the second conveying section, and the connection position of the first conveying section and the second conveying section constitutes the anti-backflow structure.

[0015] According to some embodiments of the utility model, the second conveying section is formed with internal spline, the internal spline is located at the downstream side of the first conveying section and is spaced apart from the anti-backflow structure along the axial direction of the motor shaft, and the height of the internal spline protruding from the inner peripheral surface of the second conveying section is less than the inner diameter difference between the first conveying section and the second conveying section.

[0016] According to some embodiments of the utility model, the oil hole is provided with a plurality of oil holes arranged along the axial direction and the circumferential direction of the motor shaft;And / or, the oil hole and the rotor of the motor are oppositely arranged along the radial direction of the motor shaft.

[0017] According to some embodiments of the present application, the conductive body is in interference fit connection with the shell, and the conductive body and the shell are made of the same material.

[0018] The present application provides a vehicle.

[0019] The vehicle according to the third aspect of the present application comprises the motor.

[0020] The vehicle according to the third aspect of the present application has the oil passing function on the basis of the conductive function, and the oil passing function and the conductive function are integrated on the conductive structure, so that the number of parts of the motor can be reduced to save the installation space, and the production cost of the motor can be reduced and the size of the motor can be reduced.

[0021] The additional aspects and advantages of the present application will be partially given in the following description, partially will be obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a partial sectional view of the motor according to the embodiment of the present application;

[0023] Figure 2 is a sectional view of the motor shaft and the motor bearing of the motor according to the embodiment of the present application;

[0024] Figure 3 is a schematic view of the conductive structure of the motor according to the embodiment of the present application;

[0025] Figure 4 is a top view of the conductive structure of the motor according to the embodiment of the present application;

[0026] Figure 5 is a sectional view of the conductive structure of the motor according to the embodiment of the present application.

[0027] REFERENCE NUMERALS:

[0028] 100, motor;

[0029] 1, shell; 11, oil inlet oil way;

[0030] 2, motor shaft; 21, oil conveying way; 211, first conveying section, 212, second conveying section; 22, oil inlet hole; 23, oil inlet; 24, anti-backflow structure; 25, inner spline;

[0031] 3, motor bearing;

[0032] 4. Conductive structure; 41. Conductive body; 411. Oil passage; 4111. Oil receiving groove; 4112. Oil channel; 412. Mounting part; 413. Insertion part; 42. Conductive brush;

[0033] 5. Rotor. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0035] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0036] The conductive structure 4 according to a first aspect embodiment of the present invention is described below with reference to the accompanying drawings.

[0037] like Figures 1 to 5 As shown, the conductive structure 4 according to the first aspect embodiment of the present invention includes: a conductive body 41 and a conductive brush 42. An oil passage 411 is formed within the conductive body 41, and the conductive brush 42 is disposed on the conductive body 41. Both the conductive body 41 and the conductive brush 42 are conductive components. Through the contact between the conductive body 41 and the housing 1 of the motor 100, and the contact between the conductive brush 42 and the motor shaft 2 of the motor 100, a connected conductive circuit is formed between the motor shaft 2, the conductive structure 4, and the housing 1. It is understood that a motor bearing 3 is disposed between the motor shaft 2 and the housing 1. When there is shaft voltage on both sides of the motor bearing 3, the shaft current at the motor bearing 3 can be released through the conductive circuit formed by the motor shaft 2, the conductive structure 4, and the housing 1, thereby preventing electro-corrosion at the motor bearing 3.

[0038] Secondly, since the oil passing oil passage 411 is arranged in the conductive body 41, in the lubricating oil passage of the motor 100, the oil inlet oil passage 11 is formed on the shell 1, and the oil conveying oil passage 21 is formed in the motor shaft 2, therefore, after the conductive structure 4 is installed on the shell 1, the oil inlet oil passage 11 and the oil conveying oil passage 21 can be communicated through the oil passing oil passage 411. That is, the oil inlet oil passage 11 on the shell 1 is communicated with the oil conveying oil passage 21 in the motor shaft 2 through the oil passing oil passage 411, so that a communicated flow path can be formed between the oil inlet oil passage 11, the oil passing oil passage 411 and the oil conveying oil passage 21, wherein the oil inlet oil passage 11 is communicated with the lubricating oil supply device, therefore, the lubricating oil can be conveyed into the oil conveying oil passage 21 by the supply device through the oil inlet oil passage 11 and the oil passing oil passage 411 in sequence, that is, by arranging the oil passing oil passage 411 on the conductive structure 4, the lubricating oil in the oil inlet oil passage 11 can be introduced into the oil conveying oil passage 21, that is, the conductive structure 4 has the oil passing function on the basis of the conductive function. Therefore, by integrating the oil passing function and the conductive function on the conductive structure 4, the number of parts can be reduced, so that the installation space and the cost can be saved.

[0039] According to the conductive structure 4 of the first aspect of the utility model, by arranging the oil passing oil passage 411 on the conductive structure 4, the conductive structure 4 has the oil passing function on the basis of the conductive function, by integrating the oil passing function and the conductive function on the conductive structure 4, the number of parts can be reduced, so that the installation space and the cost can be saved.

[0040] According to some embodiments of the utility model, the conductive structure 4 comprises: a conductive body 41 and a conductive brush 42 arranged on the conductive body 41, the conductive body 41 is connected with the shell 1 and is arranged spaced apart from the motor shaft 2, part of the conductive body 41 extends into the oil conveying oil passage 21, the oil passing oil passage 411 is formed in the conductive body 41, the outlet of the oil passing oil passage 411 is located on the part of the conductive body 41 extending into the oil conveying oil passage 21, and the conductive brush 42 is in interference contact with the motor shaft 2.

[0041] The conductive body 41 and the conductive brush 42 can be metal pieces, alloy material pieces, composite material pieces or the like, as long as the conductive body 41 and the conductive brush 42 can conduct electricity, which is not limited here.

[0042] According to some embodiments of the utility model, the conductive main body 41 includes an installation part 412 and an insertion part 413, the projection of the insertion part 413 on the reference surface is located within the projection of the installation part 412 on the reference surface, the reference surface is perpendicular to the axial direction of the insertion part 413, and the conductive brush 42 is arranged on the outer peripheral surface of the insertion part 413. Among them, the insertion part 413 can be inserted into the motor shaft 2, and the size of the insertion part 413 in the extension direction of the reference surface is smaller than the size of the installation part 412 in the extension direction of the reference surface, which can reduce the difficulty of inserting the insertion part 413 into the motor shaft 2, and at the same time, the insertion part 413 can avoid contacting the motor shaft 2, and the conductive brush 42 is arranged on the outer peripheral surface of the insertion part 413, so that the conductive brush 42 can be in interference contact with the inner peripheral surface of the motor shaft 2 to form an electrical connection.

[0043] Specifically, the installation part 412 is arranged on one side of the motor shaft 2 in the axial direction and connected with the housing 1, the insertion part 413 is arranged on one side of the installation part 412 facing the motor shaft 2 and passes through the oil conveying path 21, the conductive brush 42 is arranged on the outer peripheral surface of the insertion part 413 and in contact with the inner peripheral surface of the motor shaft 2, and the outlet of the oil passing path 411 is located at one end of the insertion part 413 away from the installation part 412. That is, the conductive brush 42 is located in the oil conveying path 21, so that the conductive brush 42 can make full use of the space in the oil conveying path 21 for installation, which is beneficial to improve the compactness of the internal structure of the motor 100. In addition, the outlet of the oil passing path 411 is located on one side of the conductive brush 42 away from the insertion part 413 in the axial direction of the motor shaft 2, which can avoid the lubricating oil in the oil passing path 411 flowing through the conductive brush 42 when flowing into the oil conveying path 21, thereby reducing the amount of lubricating oil contacted by the conductive brush 42 to ensure the conductivity of the conductive brush 42.

[0044] According to some embodiments of the utility model, the end surface of the installation part 412 away from the insertion part 413 forms an oil receiving groove 4111, the insertion part 413 forms an oil passing channel 4112 penetrating along the axial direction of the motor shaft 2 and communicating with the oil receiving groove 4111, and the oil receiving groove 4111 and the oil passing channel 4112 jointly constitute the oil passing path 411. That is, the oil receiving groove 4111 is used for receiving the lubricating oil flowing out through the outlet of the oil inlet path 11, and the lubricating oil in the oil receiving groove 4111 flows through the oil passing channel 4112 towards the direction away from the oil receiving groove 4111 and flows into the oil conveying path 21 at one end of the insertion part 413 away from the installation part 412, thereby guiding the lubricating oil in the oil inlet path 11 into the oil conveying path 21.

[0045] In one specific example, the outer periphery contour of the mounting portion 412 and the insertion portion 413 are both formed as a circle, the oil receiving groove 4111 is opposite the outlet of the oil inlet passage 11 in the axial direction of the motor shaft 2, the diameter of the insertion portion 413 is smaller than the inner diameter of the oil inlet 23, the insertion portion 413 is inserted into the oil conveying passage 21, the outlet end of the oil passing channel 4112 is located at the side end face of the insertion portion 413 away from the mounting portion 412, the diameter of the mounting portion 412 is greater than the inner diameter of the oil inlet 23, the outer periphery surface of the insertion portion 413 is formed with a plug-in groove, the fixed end of the conductive brush 42 is inserted into the plug-in groove and fixed by a curing agent, the length of the conductive brush 42 protruding out of the outer periphery surface of the insertion portion 413 is greater than the distance between the outer periphery surface of the insertion portion 413 and the inner periphery surface of the motor shaft 2, and the free end of the conductive brush 42 is a soft brush head to be in interference fit with the motor shaft 2.

[0046] According to some embodiments of the present application, the conductive brush 42 is provided with a plurality of intervals arranged along the circumferential direction and / or the axial direction of the insertion portion 413. Among them, the conductive brush 42 can be provided with a plurality of intervals arranged along the circumferential direction of the motor shaft 2 on the outer periphery surface of the insertion portion 413, so as to better increase the number of conductive brushes 42 to increase the conductive contact position between the conductive structure 4 and the motor shaft 2, thereby improving the conductive efficiency of the conductive structure 4. In addition, it can better reduce the requirement for installation position accuracy of the conductive structure 4. For example, when the central axis of the conductive structure 4 is parallel and spaced apart from the central axis of the motor shaft 2, i.e., different shafts, through the plurality of conductive brushes 42 arranged along the circumferential direction, at least one of the conductive brushes 42 can be guaranteed to contact the motor shaft 2. Of course, the conductive brush 42 can also be provided with a plurality of intervals arranged along the axial direction of the motor shaft 2, and the conductive brush 42 can also be provided with a plurality of intervals arranged along the circumferential direction and the axial direction of the motor shaft 2. Here, it is not necessary to be described one by one.

[0047] According to some embodiments of the present application, the conductive brush 42 is in the shape of a cylindrical bundle. Thus, the conductive brush 42 in the shape of a cylindrical bundle is convenient to keep the shape, so that the conductive brush 42 can be kept in the state of interference contact with the motor shaft 2, and the contact effect with the motor shaft 2 can be avoided. The conductive brush 42 is deformed to affect the reliability of the conductive brush 42.

[0048] According to some embodiments of the utility model, in the radial direction of the insertion part 413, the length of the conductive brush 42 protruding from the outer circumferential surface of the insertion part 413 is 1-4mm. That is, the distance between the free end of the conductive brush 42 and the outer circumferential surface of the insertion part 413 is controlled within the range of 1mm to 4mm, for example, the distance between the free end of the conductive brush 42 and the outer circumferential surface of the insertion part 413 is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc., which is not specifically limited here. Therefore, it can avoid the risk of interference caused by the too short length of the conductive brush 42 and the too close distance between the insertion part 413 and the inner circumferential surface of the motor shaft 2, which causes the insertion part 413 to contact the motor shaft 2, and at the same time, it can avoid the length of the conductive brush 42 being too long and the shape affecting the interference contact effect with the motor shaft 2, so that the interference contact effect of the conductive brush 42 and the motor shaft 2 can be ensured while avoiding the interference between the insertion part 413 and the motor shaft 2.

[0049] The motor 100 according to the second aspect of the utility model will be described below with reference to the accompanying drawings.

[0050] The motor 100 according to the second aspect of the utility model comprises a housing 1, a motor shaft 2, a motor bearing 3 and a conductive structure 4, the housing 1 is formed with an oil inlet oil way 11, the motor shaft 2 is arranged in the housing 1 and is provided with the motor bearing 3 between the housing 1, the motor shaft 2 is a hollow structure formed with a conveying oil way 21 inside, the outer circumferential surface of the motor shaft 2 is formed with an oil conveying hole 22 communicated with the conveying oil way 21, the conductive main body 41 is connected with the housing 1 and is arranged spaced apart from the motor shaft 2, the conductive brush 42 is in interference contact with the motor shaft 2, and the oil passing oil way 411 is communicated with the oil inlet oil way 11 and the conveying oil way 21. Wherein, the conductive main body 41 does not contact the motor shaft 2, which can avoid the interference of the conductive main body 41 with the rotation of the motor shaft 2 to ensure that the conductive main body 41 can continuously convey lubricating oil into the conveying oil way 21 during the rotation of the motor shaft 2, wherein the relatively soft conductive brush 42 can be in interference contact with the motor shaft 2 by deforming, so that the conductive brush 42 can form a conductive loop between the motor shaft 2 and the conductive main body 41 while reducing the resistance to the rotation of the motor shaft 2.

[0051] In addition, since the oil conveying hole 22 is arranged on the motor shaft 2, the lubricating oil in the conveying oil way 21 can flow to the outer circumferential side of the motor shaft 2 through the oil conveying hole 22 and contact the motor bearing 3 to lubricate the motor bearing 3, thereby preventing the motor bearing 3 from rusting and reducing the wear of the motor bearing 3 to prolong the service life of the motor bearing 3. Moreover, the outer circumferential surface of the motor shaft 2 is connected with the rotor 5, and the lubricating oil flowing to the outer circumferential side of the motor shaft 2 can reduce the heat of the rotor 5 by heat exchange with the rotor 5, so as to ensure that the rotor 5 can be kept within a safe temperature range to improve the stability of the motor 100 operation.

[0052] And the conductive structure 4 has the oil passing function on the basis of the conductive function. Therefore, by integrating the oil passing function and the conductive function on the conductive structure 4, the number of parts of the motor 100 can be reduced to save the installation space, and the production cost of the motor 100 is reduced, and the size of the motor 100 is reduced.

[0053] According to the motor 100 of the second aspect of the utility model, the conductive structure 4 has the oil passing function on the basis of the conductive function, by integrating the oil passing function and the conductive function on the conductive structure 4, the number of parts of the motor 100 can be reduced to save the installation space, and the production cost of the motor 100 is reduced, and the size of the motor 100 is reduced.

[0054] In some embodiments, the outlet of the oil passing oil path 411 is located on the part of the conductive main body 41 extending into the conveying oil path 21. That is, the position of the oil passing oil path 411 conveying the lubricating oil to the conveying oil path 21 is located in the conveying oil path 21, so that the stability of the conductive main body 41 conveying the lubricating oil into the motor shaft 2 can be improved, and the part of the conductive main body 41 extending into the conveying oil path 21 can share part of the space with the motor shaft 2, in other words, the conductive main body 41 can use part of the space of the conveying oil path 21 for installation, so that the installation space occupied by the conductive structure 4 and the motor shaft 2 can be saved, and the overall structure of the motor 100 is more compact.

[0055] According to some embodiments of the utility model, the motor shaft 2 forms an oil inlet 23 communicating with the conveying oil path 21 at the axial end face close to the oil inlet oil path 11, part of the conductive main body 41 is inserted into the conveying oil path 21 through the oil inlet 23, and the inner circumferential surface of the motor shaft 2 is formed with an anti-backflow structure 24, which is located on the downstream side of the conductive brush 42 in the axial direction of the motor shaft 2, and the anti-backflow structure 24 is used to block the lubricating oil in the conveying oil path 21 from flowing towards the conductive brush 42.

[0056] Wherein, the downstream side here is relative to the flow direction of the lubricating oil in the conveying oil path 21. Therefore, by the anti-backflow structure 24, the lubricating oil in the conveying oil path 21 can be prevented from flowing towards the conductive brush 42, and the amount of lubricating oil contacted by the conductive brush 42 can be reduced, so as to ensure the conductive performance of the conductive brush 42.

[0057] According to some embodiments of the utility model, at least one of the inner circumferential surface of the motor shaft 2 and the conductive main body 41 is provided with an anti-backflow structure 24, which is located on the downstream side of the conductive brush 42 in the axial direction of the motor shaft 2, and the anti-backflow structure 24 is used to block the lubricating oil in the conveying oil path 21 from flowing towards the conductive brush 42.

[0058] According to some embodiments of the present application, the oil delivery path 21 comprises a first delivery section 211 and a second delivery section 212 which are connected in the axial direction of the motor shaft 2, the second delivery section 212 is located on the side of the first delivery section 211 away from the oil inlet 23, the conductive structure 4 is located on the side of the second delivery section 212 adjacent to the oil inlet 23, the inner diameter of the first delivery section 211 is smaller than that of the second delivery section 212, and the connection position of the first delivery section 211 and the second delivery section 212 forms an anti-backflow structure 24. That is, the distance between the inner circumferential surface of the first delivery section 211 and the central axis of the motor shaft 2 is smaller than the distance between the inner circumferential surface of the second delivery section 212 and the central axis of the motor shaft 2, so that a drop can be formed at the connection position of the first delivery section 211 and the second delivery section 212, such as a stepped structure or a ramp-shaped anti-backflow structure 24. In this way, the forming difficulty of the anti-backflow structure 24 can be reduced, for example, in the machining process of the oil delivery path 21, a smaller drill bit is used to drill the first delivery section 211, and a larger drill bit is used to drill the second delivery section 212.

[0059] In some embodiments, the outlet of the through-oil oil path 411 is located in the second delivery section 212, and the conductive brush 42 is located in the first delivery section 211, that is, the outlet of the through-oil oil path 411 is located on the part of the conductive body 41 extending into the second delivery section 212. Therefore, the through-oil oil path 411 can directly deliver lubricating oil into the second delivery section 212, and the anti-backflow structure 24 can better block the lubricating oil in the second delivery section 212 from flowing towards the first delivery section 211, thereby reducing the amount of lubricating oil contacted by the conductive brush 42.

[0060] Specifically, the conveying oil path 21 penetrates the motor shaft 2 along the axial direction of the motor shaft 2, and the inner spline 25 is formed in the second conveying section 212 and is located at the downstream side of the first conveying section 211 and is spaced apart from the anti-backflow structure 24 along the axial direction of the motor shaft 2, wherein the inner spline 25 in the second conveying section 212 is used to cooperate with the outer spline on the input shaft of the reduction gearbox to transmit torque between the motor 100 and the reduction gearbox, and the height of the inner spline 25 protruding from the inner circumferential surface of the second conveying section 212 is less than the difference in the inner diameter between the first conveying section 211 and the second conveying section 212, so that when the liquid level of the lubricating oil in the conveying oil path 21 is higher than the height of the inner spline 25, the lubricating oil can flow over the inner spline 25 and be discharged in a direction away from the first conveying section 211, and the backflow of the lubricating oil in the conveying oil path 21 to the conductive brush 42 caused by the liquid level of the lubricating oil being higher than the inner circumferential surface of the first conveying section 211 can be avoided, thereby reducing the amount of lubricating oil contacted by the conductive brush 42 to ensure the conductivity of the conductive brush 42. Therefore, the anti-backflow effect can be achieved by adjusting the size and height of the inner spline 25, without the need for additional structural features, and the structure and process are simple. In addition, the lubricating oil discharged from the motor shaft 2 returns to the oil inlet path 11 in the housing 1, thereby forming a circulating loop of lubricating oil between the motor shaft 2 and the housing 1.

[0061] According to some embodiments of the present application, the oil supply hole 22 is arranged in multiple along the axial and circumferential directions of the motor shaft 2. That is, the lubricating oil in the conveying oil path 21 can flow to the outer circumferential side of the motor shaft 2 through the multiple oil supply holes 22 arranged along the axial and circumferential directions of the motor shaft 2. Thus, by increasing the number of oil supply holes 22, the amount of lubricating oil flowing to the outer circumferential side of the motor shaft 2 can be better increased, and the coverage area of the oil supply hole 22 can be better increased to improve the uniformity of the lubricating oil coverage, thereby improving the cooling effect of the lubricating oil on the rotor 5 and the lubricating effect of the lubricating oil on the motor bearing 3.

[0062] In one specific example, the spacing between any two of the multiple oil supply holes 22 arranged along the circumferential direction of the motor shaft 2 is the same, that is, the multiple oil supply holes 22 can be uniformly spaced along the circumferential direction of the motor shaft 2 on the motor shaft 2 to improve the uniformity of the distribution and oil supply of the oil supply holes 22.

[0063] According to some embodiments of the present application, the oil supply hole 22 is arranged opposite the rotor 5 of the motor 100 along the radial direction of the motor shaft 2. That is, the lubricating oil in the conveying oil path 21 flows to the outer circumferential side of the motor shaft 2 through the oil supply hole 22 and is located at the rotor 5, thereby ensuring that the lubricating oil flowing out through the oil supply hole 22 can first contact the rotor 5, which is beneficial to improving the cooling efficiency of the lubricating oil on the rotor 5.

[0064] According to some embodiments of the present application, the conductive body 41 is connected with the shell 1 in interference fit, and the conductive body 41 and the shell 1 are made of the same material. Thus, the conductive body 41 can be installed in the designated installation position in the shell 1 without using additional connecting members, so that the connection structure of the conductive body 41 and the shell 1 can be simplified and the connection cost can be reduced. In addition, the conductive body 41 and the shell 1 are made of the same material, so that the conductive body 41 and the shell 1 have the same expansion coefficient. Therefore, when the temperature rises or falls, the deformation amount of the conductive body 41 and the shell 1 is the same, so that the interference fit connection relationship between the conductive body 41 and the shell 1 can be well maintained. In one specific example, the shell 1 and the conductive body 41 are both aluminum members, which is beneficial to improve the lightweight level of the motor 100.

[0065] A vehicle according to the third aspect of the present application will be described below with reference to the accompanying drawings.

[0066] The vehicle according to the third aspect of the present application comprises: a motor 100.

[0067] The vehicle according to the third aspect of the present application has the oil passing function on the basis of the conductive function, and by integrating the oil passing function and the conductive function on the conductive structure 4, the number of parts of the motor 100 can be reduced to save the installation space, and the production cost of the motor 100 can be reduced while the size of the motor 100 is reduced.

[0068] In the present application, unless otherwise clearly specified and limited, the terms such as "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0070] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An electrically conductive structure, characterized by, The conductive structure comprises: a conductive body, an oil passage being formed in the conductive body, the conductive body comprising a mounting portion and an insertion portion, a projection of the insertion portion on a reference surface being located within a projection of the mounting portion on the reference surface, the reference surface being perpendicular to an axial direction of the insertion portion, an oil receiving groove being formed on an end surface of the mounting portion facing away from the insertion portion, the insertion portion forming an oil passage channel penetrating in the axial direction and communicating with the oil receiving groove, the oil receiving groove and the oil passage channel jointly forming the oil passage; a conductive brush arranged on the conductive body, the conductive brush being arranged on an outer circumferential surface of the insertion portion.

2. The electrically conductive structure of claim 1, wherein, The conductive brush is arranged in a plurality of intervals in the circumferential direction and / or the axial direction of the insertion portion.

3. The electrically conductive structure of claim 1, wherein, The conductive brush is in a cylindrical bundle shape; and / or, in the radial direction of the insertion portion, the length of the conductive brush protruding from the outer circumferential surface of the insertion portion ranges from 1mm to 4mm.

4. An electric machine characterized by The motor comprises: a housing, an oil inlet passage being formed in the housing; a motor shaft, the motor shaft being arranged in the housing and being provided with a motor bearing between the housing, the motor shaft being in a hollow structure with a conveying oil passage formed therein, an oil delivery hole being formed on an outer circumferential surface of the motor shaft and communicating with the conveying oil passage; The conductive structure according to any one of claims 1-3, the conductive body being connected with the housing and being arranged in an interval with the motor shaft, the conductive brush being in interference contact with the motor shaft, the oil passage communicating with the oil inlet passage and the conveying oil passage.

5. The electric machine of claim 4, wherein, An axial end surface of the motor shaft close to the oil inlet passage forms an oil inlet opening communicating with the conveying oil passage, a portion of the conductive body being inserted into the conveying oil passage through the oil inlet opening, an anti-backflow structure being formed on an inner circumferential surface of the motor shaft, the anti-backflow structure being located on a downstream side of the conductive brush in the axial direction of the motor shaft, the anti-backflow structure being used to block the lubricating oil in the conveying oil passage from flowing towards the conductive brush.

6. The electric machine of claim 5, wherein, The conveying oil passage comprises a first conveying section and a second conveying section communicating in the axial direction of the motor shaft, the second conveying section being located on a side of the first conveying section facing away from the oil inlet opening, the conductive structure being located on a side of the second conveying section adjacent to the oil inlet opening, an inner diameter of the first conveying section being smaller than an inner diameter of the second conveying section, a connection position of the first conveying section and the second conveying section constituting the anti-backflow structure.

7. The electric machine of claim 6, wherein, An internal spline is formed in the second conveying section, the internal spline being located on a downstream side of the first conveying section and being arranged in an interval with the anti-backflow structure in the axial direction of the motor shaft, a height of the internal spline protruding from an inner circumferential surface of the second conveying section being smaller than a difference in the inner diameters between the first conveying section and the second conveying section.

8. The electric machine of claim 4, wherein, The oil delivery hole is arranged in a plurality of intervals in the axial direction and the circumferential direction of the motor shaft; and / or, the oil delivery hole and a rotor of the motor are arranged in opposition in the radial direction of the motor shaft.

9. The electric machine of claim 4, wherein, The conductive body is connected with the housing in an interference fit, the conductive body and the housing being made of the same material.

10. A vehicle characterized by comprising: The motor comprises: The motor according to any one of claims 4-9.

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