Electrically conductive and oil-conducting structure and electric drive mechanism

Abstract

The embodiment of the utility model provides a kind of electrically conductive oil guide structure and electric drive mechanism, it is related to motor electric drive technical field.The utility model provides electrically conductive oil guide structure including disc part and pipe section, disc part includes first surface and second surface, pipe section is connected perpendicularly in first surface, pipe section extends to rotor shaft inside, first surface and bearing resistance hold;First oil channel is opened in pipe section and penetrates disc part;Conductive part is arranged in the inner wall of first oil channel;Second oil channel is opened in pipe section and is communicated with first oil channel;Oil inlet distribution cavity is opened in second surface;Oil inlet oil channel is opened in the edge of the disc part and is communicated with oil inlet distribution cavity, to guide lubricating oil into oil inlet distribution cavity.The utility model provides electric drive mechanism including shell, motor rotor, bearing and above-mentioned electrically conductive oil guide structure.The utility model can improve the problem that current motor structure structure is miscellaneous, and the degree of integration is low.

Description

Technical Field

[0001] This utility model relates to the field of electric motor and electric drive technology, and more specifically, to a conductive oil-conducting structure and an electric drive mechanism. Background Technology

[0002] With the continuous development of new energy vehicles, the integration and efficiency requirements of electric drive systems are becoming increasingly stringent, resulting in increasingly stringent space requirements for the electric drive system in the vehicle. At the same time, the high speed and high voltage development of electric drives have brought more attention to the issues of lubrication and cooling, as well as bearing electro-corrosion.

[0003] The inventors discovered that existing electric drives often have various structural components such as oil collection trays, oil guide rings, conductive rings, or conductive brushes. The placement of these structural components takes up a lot of space, resulting in the current electric drive mechanism having problems such as redundant structure and low integration. Utility Model Content

[0004] The purpose of this invention is to provide a conductive oil-conducting structure and an electric drive mechanism, which can improve the problems of current motor structures being complex and having a low degree of integration.

[0005] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a conductive oil-conducting structure, comprising: The disc portion includes a first surface and a tube portion. The disc portion includes a first surface and a second surface facing each other. The tube portion is perpendicularly connected to the first surface and is used to extend into the motor rotor shaft. The first surface is used to abut against the motor bearing. The first oil passage is opened inside the circular tube and passes through the circular disk. A conductive part is located at the end of the circular tube portion away from the circular disk portion, and the conductive part is disposed on the inner wall of the first oil passage; The second oil passage is opened in the circular tube and communicates with the first oil passage; An oil inlet passage is provided on the disc portion and communicates with the first oil passage to supply oil to the first oil passage.

[0006] In an optional embodiment, the oil inlet path includes an oil inlet distribution cavity and an oil inlet passage. The oil inlet distribution cavity is opened on the second surface and communicates with the first oil passage. The oil inlet passage is opened on the edge of the disc portion and communicates with the oil inlet distribution cavity to guide lubricating oil into the oil inlet distribution cavity.

[0007] In an optional embodiment, the oil inlet circuit further includes a bearing oil reservoir and a connecting oil passage. The bearing oil reservoir is located on the first surface, and the connecting oil passage is located on the disc portion and is used to connect the bearing oil reservoir and the oil inlet distribution chamber.

[0008] In an optional embodiment, the conductive part includes a conductive brush; or, the conductive part includes a conductive ring.

[0009] Secondly, this utility model provides an electric drive mechanism, including a housing and a motor rotor, a bearing, and a conductive oil guiding structure as described in any of the foregoing embodiments disposed within the housing. The motor rotor has a first end and a second end opposite to each other, and a rotor shaft passes through the first end and the second end. The first end is connected to the bearing through the rotor shaft, and the second end is driven by a gear through the rotor shaft and the bearing. The conductive oil guiding structure is disposed at the first end, and / or the conductive oil guiding structure is disposed at the second end.

[0010] In an optional embodiment, the conductive oil guiding structure includes a first conductive oil guiding structure, which is disposed at the first end, and the second oil passage is opened in the circular tube in the radial direction of the circular tube to deliver lubricating oil to the oil passage cavity of the motor rotor.

[0011] In an optional embodiment, the electric drive mechanism includes two motor rotors and two first conductive oil guiding structures. The first ends of the two motor rotors are close to each other and connected through the housing. The two first conductive oil guiding structures are respectively disposed at the first ends of the two motor rotors.

[0012] In an optional embodiment, the conductive oil guiding structure further includes a second conductive oil guiding structure, which is disposed at the second end. A connecting portion is provided between the circular tube portion and the circular disk portion. The first oil passage passes through the connecting portion, and the second oil passage is radially opened through the connecting portion to deliver lubricating oil to the inner cavity of the gear shaft.

[0013] In an optional embodiment, the electric drive mechanism includes two motor rotors and two second conductive oil guiding structures. The second ends of the two motor rotors are close to each other and connected through the housing. The two conductive oil guiding structures are respectively disposed at the second ends of the two motor rotors.

[0014] The electric drive mechanism includes a first conductive oil guiding structure and a second conductive oil guiding structure. The first conductive oil guiding structure is disposed at the first end, and the second oil passage is opened in the circular tube section along the radial direction of the circular tube section. The second conductive oil guiding structure is disposed at the second end. A connecting part is provided between the circular tube section and the disc section. The first oil passage passes through the connecting part, and the second oil passage is opened in the connecting part along the radial direction.

[0015] The beneficial effects of the conductive oil-guiding structure and electric drive mechanism provided in this embodiment of the invention include: Lubricating oil enters the oil distribution chamber through the oil inlet passage. A portion of the lubricating oil enters the circular tube section through the first oil passage and enters the motor rotor shaft through the conductive part to cool and lubricate the motor rotor. A portion of the lubricating oil flows out through the second oil passage and lubricates the gear shaft cavity or the motor rotor oil passage partition cavity. By integrating the conventional oil guiding structure and the conductive structure, both conductive and oil guiding functions can be achieved simultaneously. Furthermore, the conductive part is located inside the circular tube section, and the shaft current is conducted to the outer casing through the conductive oil guiding structure. This reduces the electro-corrosion of the bearings and avoids conflict or interference with other components, facilitating a highly integrated and compact layout of the electric drive mechanism. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the first conductive oil-conducting structure provided in this embodiment from a first-view perspective; Figure 2 This is a cross-sectional view of the first conductive oil-conducting structure provided in this embodiment; Figure 3 This is a schematic diagram of the second conductive oil-conducting structure provided in this embodiment from a first-view perspective; Figure 4 This is a cross-sectional view of the second conductive oil-conducting structure provided in this embodiment; Figure 5 A schematic diagram of a single-motor electric drive mechanism provided for some optional embodiments; Figure 6 A schematic diagram of the dual-motor electric drive mechanism provided for some optional embodiments; Figure 7 A schematic diagram of the dual-motor electric drive mechanism provided for some alternative embodiments.

[0018] Icons: 100 - Conductive oil guiding structure; 110 - First conductive oil guiding structure; 120 - Second conductive oil guiding structure; 130 - Disc section; 131 - First surface; 132 - Second surface; 133 - Oil inlet distribution cavity; 134 - Oil inlet passage; 135 - Bearing oil storage cavity; 136 - Connecting oil passage; 140 - Circular tube section; 141 - First oil passage; 142 - Second oil passage; 150 - Conductive part; 160 - Connecting part; 200 - Housing; 210 - Motor rotor; 211 - First end; 212 - Second end; 213 - Rotor shaft; 220 - Bearing; 230 - Gear. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] The following detailed description, through embodiments and in conjunction with the accompanying drawings, details the overall structure, working principle, and technical effects of the conductive oil-guiding structure and electric drive mechanism provided by this utility model.

[0026] Please refer to Figures 1-4 This utility model provides a conductive and oil-conducting structure for use in electric motor drive systems. It can simultaneously achieve conductive and oil-conducting functions, with high integration, thereby simplifying the structure of electric motor drive systems and improving their integration.

[0027] Please refer to Figures 1-4 The present invention provides a conductive oil-conducting structure 100 comprising a disc portion 130, a circular tube portion 140, and a conductive portion 150. The disc portion 130 has a first surface 131 and a second surface 132 facing each other. The circular tube portion 140 is connected to the disc portion 130, and the circular tube portion 140 is perpendicular to the first surface 131 of the disc portion 130, and the axis of the circular tube portion 140 coincides with the axis of the disc portion 130. A first oil passage 141 is formed inside the circular tube portion 140, making the circular tube portion 140 a circular tube structure, and the first oil passage 141 also penetrates the disc portion 130. The conductive portion 150 is disposed at the end of the circular tube portion 140 away from the disc portion 130, and the conductive portion 150 is disposed on the inner wall of the first oil passage 141. Furthermore, a second oil passage 142 communicating with the first oil passage 141 is formed on the circular tube portion 140. An oil inlet passage is provided on the disc portion 130, which is connected to the first oil passage 141 and is used to supply oil to the first oil passage 141. The first oil passage 141 includes an oil inlet distribution cavity 133 and an oil inlet passage 134. An oil inlet distribution cavity 133 connected to the first oil passage 141 is formed on the second surface 132, and an oil inlet passage 134 connected to the oil inlet distribution cavity 133 is formed on the edge of the disc portion 130. The oil inlet passage 134 is used to guide lubricating oil into the oil inlet distribution cavity 133, and then guide the lubricating oil into the electric drive mechanism for lubrication through the first oil passage 141 and the second oil passage 142.

[0028] Lubricating oil enters the oil distribution chamber 133 through the oil inlet passage 134. A portion of the lubricating oil enters the circular tube section 140 through the first oil passage 141, and then enters the motor rotor 210 shaft through the conductive part 150 to cool and lubricate the motor rotor 210. A portion of the lubricating oil flows out through the second oil passage 142 and lubricates the inner cavity of the gear 230 shaft or the oil passage partition of the motor rotor 210. The conductive and oil-guiding structure 100 provided by this utility model integrates conventional oil-guiding and conductive structures in an orderly manner, achieving both conductive and oil-guiding functions simultaneously. Furthermore, the conductive part 150 is located inside the circular tube section 140, allowing shaft current to be conducted to the outer casing 200 through the conductive and oil-guiding structure 100. This reduces the electro-corrosion of the bearing 220 without interfering with other components, facilitating a highly integrated and compact layout of the electric drive mechanism.

[0029] Please refer to Figures 1-4 In some optional embodiments, the oil inlet circuit further includes a bearing oil reservoir 135 and a connecting oil passage 136. The bearing oil reservoir 135 is formed on the first surface 131, and the connecting oil passage 136 for connecting the bearing oil reservoir 135 and the oil inlet distribution cavity 133 is formed on the disc portion 130. The first surface 131 of the disc portion 130 abuts against the bearing 220. During operation, part of the lubricating oil in the oil inlet distribution cavity 133 enters the bearing oil reservoir 135 through the connecting oil passage 136, and then the lubricating oil enters the bearing 220 to lubricate the bearing 220 rollers and bearing 220 raceway.

[0030] Please refer to Figures 1-4 In some alternative embodiments, multiple oil inlet channels 134 are provided on the disc portion 130. The oil inlet channels 134 serve as inlets and outlets for lubricating oil, used to guide lubricating oil into the oil distribution chamber 133. The provision of multiple oil inlet channels 134 reduces the overall weight of the conductive oil guiding structure 100 while ensuring the structural strength of the disc portion 130.

[0031] Please refer to Figures 1-4 The conductive part 150 is disposed on the inner wall of the first oil passage 141, and a through hole for discharging lubricating oil is formed on the circular tube portion 140 at the conductive part 150. In some alternative embodiments, the conductive part 150 includes a conductive brush; in other alternative embodiments, the conductive part 150 includes a conductive ring.

[0032] On the other hand, please refer to Figures 5-7 The present invention also provides an electric drive mechanism, including the above-mentioned conductive oil guiding structure 100. The electric drive mechanism provided by the present invention, by adopting the above-mentioned conductive oil guiding structure 100, satisfies the function of conductive oil guiding while having a simple and compact structure, high integration, and is easy to manufacture.

[0033] The electric drive mechanism provided by this utility model includes a housing 200, a motor rotor 210, a bearing 220, and the aforementioned conductive and oil-conducting structure 100. The motor rotor 210 has a first end 211 and a second end 212, with a rotor shaft 213 passing between them. When the electric drive mechanism is energized, the motor rotor 210 drives the rotor shaft 213 to rotate, thereby outputting power. The first end 211 is connected to the bearing 220 via the rotor shaft 213, and the second end 212 is connected to a gear 230 via the rotor shaft 213 and the bearing 220. The conductive and oil-conducting structure 100 is provided between the first end 211 and the housing 200, and / or between the second end 212 and the housing 200.

[0034] Please refer to Figures 1-4In some optional embodiments, the conductive oil guiding structure 100 includes a first conductive oil guiding structure 110, which can be disposed at the first end 211 of the motor rotor 210. A second oil passage 142 is radially opened in the circular tube portion 140. In other optional embodiments, the conductive oil guiding structure 100 includes a second conductive oil guiding structure 120, which can be disposed at the second end 212 of the motor rotor 210. In the second conductive oil guiding structure 120, a connecting portion 160 is provided between the circular tube portion 140 and the disc portion 130. The first oil passage 141 passes through the connecting portion 160, and the second oil passage 142 is radially opened in the connecting portion 160. Due to the provision of the connecting portion 160, the length of the second conductive oil guiding structure 120 is greater than that of the first conductive oil guiding structure 110, so that the second conductive oil guiding structure 120 can extend into the interior of the gear 230 and deliver lubricating oil to the inner cavity of the gear shaft.

[0035] Please refer to Figure 5 In some optional embodiments, the electric drive mechanism is a single-motor electric drive mechanism, which includes a motor rotor 210, a first conductive oil guiding structure 110, and a second conductive oil guiding structure 120. The first conductive oil guiding structure 110 is disposed at a first end 211; the second conductive oil guiding structure 120 is disposed at a second end 212. Specifically, the second conductive oil guiding structure 120 is disposed between the rotor shaft 213 and the gear 230. In the single-motor electric drive mechanism, the first conductive oil guiding structure 110 is disposed at the second end 212. While conducting electricity, the first conductive oil guiding structure 110 is used to spray oil at the end of the motor rotor 210, spraying oil onto the stator end winding and rotor end face for cooling and lubrication of the motor rotor 210. The second conductive oil guiding structure 120 is used for lubrication and cooling at the transmission connection between the rotor shaft 213 and the gear 230 to reduce abnormal wear of the rotor shaft 213, thereby extending the life of the electric drive mechanism.

[0036] Please refer to Figure 6 In some alternative embodiments, the electric drive mechanism is a coaxial dual-motor electric drive mechanism, which includes two motor rotors 210 and two first conductive oil guiding structures 110. The first ends 211 of the two motor rotors 210 are close to each other and connected through the housing 200, thereby combining two single-motor electric drive mechanisms into a dual-motor electric drive mechanism. The two first conductive oil guiding structures 110 are respectively disposed at the first ends 211 of the two motor rotors 210 to cool and lubricate the two motor rotors 210 respectively.

[0037] Please refer to Figure 7In some alternative embodiments, the electric drive mechanism is also a coaxial dual-motor electric drive mechanism, including two motor rotors 210 and two second conductive oil guiding structures 120. In this embodiment, the second ends 212 of the two motor rotors 210 are close to each other and connected through the housing 200, thereby combining the two single-motor electric drive mechanisms into a dual-motor electric drive mechanism. The two second conductive oil guiding structures 120 are respectively disposed at the second ends 212 of the two motor rotors 210 to cool and lubricate the two motor rotors 210 respectively.

[0038] In summary, the implementation principle of the conductive oil guiding structure 100 and electric drive mechanism provided by this utility model is as follows: lubricating oil enters the oil distribution chamber 133 through the oil inlet passage 134, a portion of the lubricating oil enters the circular tube 140 through the first oil passage 141, and enters the motor rotor 210 shaft through the conductive part 150 to cool and lubricate the motor rotor 210. A portion of the lubricating oil flows out through the second oil passage 142 and lubricates the inner cavity of the gear 230 shaft or the oil passage partition of the motor rotor 210. By integrating the conventional oil guiding structure and the conductive structure, the conductive and oil guiding functions can be realized simultaneously. Furthermore, the conductive part 150 is disposed inside the circular tube 140, and the shaft current is conducted to the outer shell 200 through the conductive oil guiding structure 100. This reduces the electro-corrosion of the bearing 220 while avoiding conflict and interference with other components, facilitating a highly integrated and compact layout of the electric drive mechanism.

[0039] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A conductive and oil-conducting structure, characterized in that, include: The disc portion includes a first surface and a tube portion. The disc portion includes a first surface and a second surface facing each other. The tube portion is perpendicularly connected to the first surface and is used to extend into the motor rotor shaft. The first surface is used to abut against the motor bearing. The first oil passage is opened inside the circular tube and passes through the circular disk. A conductive part is located at the end of the circular tube portion away from the circular disk portion, and the conductive part is disposed on the inner wall of the first oil passage; The second oil passage is opened in the circular tube and communicates with the first oil passage; An oil inlet passage is provided on the disc portion and communicates with the first oil passage to supply oil to the first oil passage.

2. The conductive oil-conducting structure according to claim 1, characterized in that, The oil inlet path includes an oil inlet distribution chamber and an oil inlet passage. The oil inlet distribution chamber is located on the second surface and is connected to the first oil passage. The oil inlet passage is located on the edge of the disc portion and is connected to the oil inlet distribution chamber to guide lubricating oil into the oil inlet distribution chamber.

3. The conductive oil-conducting structure according to claim 2, characterized in that, The oil inlet circuit also includes a bearing oil storage chamber and a connecting oil passage. The bearing oil storage chamber is located on the first surface, and the connecting oil passage is located on the disc portion and is used to connect the bearing oil storage chamber and the oil inlet distribution chamber.

4. The conductive oil-conducting structure according to claim 1, characterized in that, The conductive part includes a conductive brush; or, the conductive part includes a conductive ring.

5. An electric drive mechanism, characterized in that, The device includes a housing and a motor rotor, a bearing, and a conductive oil guiding structure as described in any one of claims 1-4, wherein the motor rotor has a first end and a second end opposite to each other, a rotor shaft passes through the first end and the second end, the first end is connected to the bearing through the rotor shaft, and the second end is connected to a gear through the rotor shaft and the bearing, the conductive oil guiding structure is disposed at the first end, and / or the conductive oil guiding structure is disposed at the second end.

6. The electric drive mechanism according to claim 5, characterized in that, The conductive oil guiding structure includes a first conductive oil guiding structure, which is disposed at the first end. The second oil passage is opened in the circular tube in the radial direction of the circular tube to deliver lubricating oil to the oil passage cavity of the motor rotor.

7. The electric drive mechanism according to claim 6, characterized in that, The electric drive mechanism includes two motor rotors and two first conductive oil guiding structures. The first ends of the two motor rotors are close to each other and connected through the housing. The two first conductive oil guiding structures are respectively disposed at the first ends of the two motor rotors.

8. The electric drive mechanism according to claim 5, characterized in that, The conductive oil guiding structure further includes a second conductive oil guiding structure, which is disposed at the second end. A connecting part is provided between the circular tube part and the circular disk part. The first oil passage passes through the connecting part, and the second oil passage is radially opened through the connecting part to deliver lubricating oil to the inner cavity of the gear shaft.

9. The electric drive mechanism according to claim 8, characterized in that, The electric drive mechanism includes two motor rotors and two second conductive oil guiding structures. The second ends of the two motor rotors are close to each other and connected through the housing. The two conductive oil guiding structures are respectively disposed at the second ends of the two motor rotors.

10. The electric drive mechanism according to claim 5, characterized in that, The electric drive mechanism includes a first conductive oil guiding structure and a second conductive oil guiding structure. The first conductive oil guiding structure is disposed at the first end, and the second oil passage in the first conductive oil guiding structure is opened in the circular tube portion along the radial direction of the circular tube portion. The second conductive oil guiding structure is disposed at the second end, and a connecting portion is provided between the circular tube portion and the disc portion in the second conductive oil guiding structure. The first oil passage passes through the connecting portion, and the second oil passage is opened in the connecting portion along the radial direction.

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