Axle current dredging structure, motor, electric assembly and vehicle

Abstract

The utility model relates to a shaft current dredging structure, a motor, an electric assembly and a vehicle, the shaft current dredging structure comprises a rotating shaft and a current guide part, one end of the rotating shaft in the axial direction is provided with a current guide end face, and the current guide part is grounded and is in conductive contact with the current guide end face. The shaft current dredging structure provided by the utility model can solve the technical problem that an existing diversion piece in conductive contact with the rotating shaft is seriously abraded.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a shaft current conducting structure, a motor, an electric assembly and a vehicle. Background Art

[0002] Due to the inevitable existence of magnetic circuit asymmetry, PWM (Pulse Width Modulation) frequency conversion technology, and electrostatic charge accumulation in the motor, shaft voltage and shaft current will exist on the rotating shaft inside the motor. The shaft current flows to the bearing and causes electrical corrosion to the bearing, such as forming grooves on the inner and outer rings or balls of the bearing, thereby increasing the vibration and noise of the motor, resulting in a significant shortening of the motor's service life.

[0003] To address the above technical issues, existing solutions involve using a flow guide to electrically contact the shaft, thereby diverting current from the shaft and preventing it from flowing to the bearings. However, existing flow guides experience severe wear when in contact with the shaft, resulting in poor durability and requiring frequent inspection and maintenance. Utility Model Content

[0004] The embodiments of the present application provide a shaft current conducting structure to solve the technical problem of serious wear of the existing flow guide parts in conductive contact with the rotating shaft.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an axial current guiding structure is provided, which includes a rotating shaft and a flow guide member, and one end of the rotating shaft in the axial direction has a flow guide end surface, and the flow guide member is grounded and in conductive contact with the flow guide end surface.

[0006] Optionally, in one embodiment, the flow guide member at least partially extends along the axial direction of the rotating shaft.

[0007] Optionally, in one embodiment, the flow guide is columnar and extends along the axial direction of the rotating shaft.

[0008] Optionally, in one embodiment, the central axis of the rotating shaft passes through the center of the flow-guiding end surface, and the flow-guiding member is in conductive contact with the center of the flow-guiding end surface.

[0009] Optionally, in one embodiment, the guide end surface is perpendicular to the central axis of the rotating shaft.

[0010] Optionally, in one embodiment, the axial current guiding structure further includes an elastic member, the elastic member abuts against the flow guide member, and the elastic member is used to maintain the abutment between the flow guide member and the flow guide end surface.

[0011] Optionally, in one embodiment, the shaft current guide structure further includes a mounting sleeve, a slide groove is provided in the mounting sleeve, the guide member is slidably installed in the slide groove, one end of the elastic member abuts against the bottom of the slide groove, and the other end of the elastic member abuts against the guide member.

[0012] Optionally, in one embodiment, the flow guide is in conductive contact with the mounting sleeve, and the mounting sleeve is grounded.

[0013] Optionally, in one embodiment, the shaft current guiding structure further includes a mounting seat, the mounting sleeve is fixed on the mounting seat, the guide member, the mounting sleeve and the mounting seat are in conductive contact, and the mounting seat is grounded.

[0014] Optionally, in one embodiment, the rotating shaft has a guide end, and the end face of the guide end forms the guide end face; or, a guide groove is recessed on the end face of the guide end, and the bottom of the guide groove forms the guide end face, and one end of the guide member extends into the guide groove and is in conductive contact with the guide end face.

[0015] Optionally, in one embodiment, the shaft current guiding structure further includes a mounting seat, the mounting seat is provided with a dustproof groove, the guide member is at least partially located in the dustproof groove, and the guide end extends into the dustproof groove.

[0016] Optionally, in one embodiment, the axial current diversion structure further includes a dustproof part, which is arranged between the outer wall of the guide end and the inner wall of the dustproof groove to cover the gap between the outer wall of the guide end and the inner wall of the dustproof groove.

[0017] Optionally, in one embodiment, the rotating shaft has a guide end, a guide groove is recessed on the end surface of the guide end, and the bottom of the guide groove forms the guide end surface; one end of the guide member extends into the guide groove and is in conductive contact with the guide end surface, and the guide member is also covered with a mounting sleeve, and the mounting sleeve partially extends into the guide groove.

[0018] Optionally, in one embodiment, the shaft current guiding structure further includes a dustproof part, which is arranged between the outer wall of the mounting sleeve and the inner wall of the guide groove to cover the gap between the outer wall of the mounting sleeve and the inner wall of the guide groove.

[0019] Optionally, in one embodiment, the dustproof member is any one of a conductive brush, a conductive non-woven fabric, and an oil seal, and the dustproof member is at least partially in contact with the rotating shaft.

[0020] According to a second aspect of the present application, a motor is provided, comprising the shaft current conducting structure described in any one of the above embodiments.

[0021] Optionally, in one embodiment, a cavity is provided in the rotating shaft, and an oil plug is provided in the cavity, the oil plug separates the cavity into an independent first chamber and a second chamber, the guide end surface is formed on the side of the oil plug close to the first chamber, and at least part of the structure of the guide member is located in the first chamber.

[0022] Optionally, in one embodiment, the motor includes a casing, the rotating shaft is mounted on the casing via a bearing, the shaft current guiding structure is mounted in the casing, and the impedance of the guide member is smaller than the impedance of the bearing.

[0023] Optionally, in one embodiment, the motor includes a rotary transformer, the rotary transformer is mounted on the rotating shaft, and the flow guide is detachably mounted on a housing of the rotary transformer.

[0024] According to a third aspect of the present application, an electric assembly is provided, which includes a reducer and a motor, the motor includes a rotating shaft and a flow guide, the rotating shaft includes an output end and a non-output end, the output end of the rotating shaft is connected to the reducer, and one end of the non-output end of the rotating shaft in the axial direction has a flow guide end surface, and the flow guide is grounded and in conductive contact with the flow guide end surface.

[0025] According to a fourth aspect of the present application, a vehicle is provided, comprising the above-mentioned motor.

[0026] In the shaft current diversion structure of the embodiment of the present application, a diversion end face is provided on the rotating shaft, and the diversion member is in conductive contact with the diversion end face, so that the current on the rotating shaft can be diverted away. It can be understood that because the linear velocity at any position on the diversion end face is less than or equal to the linear velocity on the outer peripheral surface of the rotating shaft, and even the linear velocity at the center position of the diversion end face is close to zero, that is, the diversion member contacts the position on the rotating shaft where the linear velocity is smaller, the wear degree of the diversion member can be reduced and the durability of the diversion member can be improved.

[0027] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0029] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0030] Figure 1 This is a structural cross-sectional view of an embodiment of the shaft current guiding structure of the present application;

[0031] Figure 2 yes Figure 1 A partial structural cross-sectional view of the shaft current conducting structure;

[0032] Figure 3 This is a partial structural cross-sectional view of another embodiment of the shaft current guiding structure of the present application;

[0033] Figure 4 This is a partial structural cross-sectional view of another embodiment of the shaft current conducting structure of the present application;

[0034] Figure 5 This is a structural diagram of an embodiment of the flow guide member, the mounting sleeve and the mounting seat in the shaft current guide structure of the present application;

[0035] Figure 6 It is a structural schematic diagram of an embodiment of the shaft current diversion structure of the present application when the guide member, the mounting sleeve and the mounting seat are installed on the mounting cover.

[0036] Description of reference numerals:

[0037] 100. Shaft current diversion structure; 10. Rotating shaft; 11. Diversion end face; 12. Diversion end; 121. Diversion groove; 13. Cavity; 131. First chamber; 132. Second chamber; 14. Oil plug; 20. Bearing; 30. Diversion member; 40. Elastic member; 50. Mounting sleeve; 51. Slide groove; 60. Mounting seat; 61. Dustproof groove; 70. Dustproof member; 80. Mounting cover. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0039] First, due to the inevitable existence of magnetic circuit asymmetry, PWM (Pulse Width Modulation) frequency conversion technology, and electrostatic charge accumulation in the motor, shaft voltage and shaft current will exist on the rotating shaft inside the motor. The shaft current flows to the bearing and causes electrical corrosion to the bearing, such as forming grooves on the inner and outer rings or balls of the bearing, thereby increasing the vibration and noise of the motor, resulting in a significant shortening of the motor's service life.

[0040] To prevent bearing corrosion, the existing solution is to use a low-impedance flow guide to electrically contact the shaft, thereby diverting current away from the shaft and preventing it from flowing into the bearings. However, existing flow guides experience severe wear when in contact with the shaft, resulting in poor durability and requiring frequent inspection and maintenance.

[0041] To solve the above technical problems, Figures 1 to 4 As shown in any of the accompanying drawings, according to the first aspect of the present application, an axial current guiding structure 100 is provided, which includes a rotating shaft 10 and a flow guide 30. The rotating shaft 10 is provided with a bearing 20 on the outer sleeve, and the rotating shaft 10 has a flow guide end surface 11 in the axial direction. The flow guide 30 is grounded and in conductive contact with the flow guide end surface 11, and the impedance of the flow guide 30 is less than the impedance of the bearing 20.

[0042] Specifically, in this embodiment, the rotating shaft 10 is the output shaft of the motor. The motor generally also includes components such as a housing, a stator, a rotor core, and a bearing seat. The housing is used to install and protect other components on the motor. The stator and the bearing seat are respectively fixed in the housing, and the bearing 20 is installed on the bearing seat. The bearing 20 generally includes an inner ring, an outer ring, and a ball. The outer ring is fixed to the bearing seat, and the ball is located between the inner ring and the outer ring so that the inner ring can rotate relative to the outer ring. The rotating shaft 10 is fixed in the inner ring, and the rotor core is fixed to the outer circumference of the rotating shaft 10 and is arranged corresponding to the stator so that the rotating shaft 10 can rotate under the action of electromagnetic force. More structures of the motor can be referred to the relevant existing technology, and will not be introduced in more detail here.

[0043] Among them, the length, outer diameter, internal structure, etc. of the rotating shaft 10 can be flexibly set according to actual conditions. The key is that in this embodiment, reference can be made to Figure 2 or Figure 3 A guide end surface 11 is provided at one axial end of the rotating shaft 10. The central axis of the rotating shaft 10 passes through the guide end surface 11. The guide end surface 11 can be perpendicular to the central axis of the rotating shaft 10, that is, the central axis of the rotating shaft 10 is a perpendicular line to the guide end surface 11. Of course, the guide end surface 11 can also be non-perpendicular to the central axis of the rotating shaft 10. For example, the guide end surface 11 is an inclined surface, and the perpendicular line of the guide end surface 11 intersects the central axis of the rotating shaft 10. The size and shape of the guide end surface 11 are not limited. For example, the shape of the guide end surface 11 can be circular, elliptical, polygonal, or other irregular shapes.

[0044] In addition, for the formation of the guide end surface 11, please refer to Figure 3 , one end of the shaft 10 may be provided with a protruding column, the protruding column is coaxially arranged with the shaft 10, and the end surface of the protruding column forms the guide end surface 11. Please refer to Figure 2 Alternatively, one end of the shaft 10 may be provided with a recessed groove (e.g. Figure 2The guide groove 121 in the embodiment is coaxially arranged with the rotating shaft 10, and the bottom of the groove forms the guide end surface 11. Alternatively, as Figure 2 As shown, a cavity 13 is provided inside the rotating shaft 10, and an oil plug 14 is provided in the cavity 13. The oil plug 14 divides the cavity 13 into an independent first chamber 131 and a second chamber 132. The oil plug 14 is formed with the guide end surface 11 on the side close to the first chamber 131. At least part of the structure of the guide member 30 is located in the first chamber 131. The second chamber 132 is used to accommodate cooling oil to facilitate cooling of the rotating shaft 10.

[0045] In short, the formation of the flow-guiding end surface 11 can be flexibly set according to actual conditions, as long as the flow-guiding member 30 can guide away the current on the rotating shaft 10 after contacting the flow-guiding end surface 11 .

[0046] In this embodiment, the guide member 30 is made of a conductive material, and the impedance of the guide member 30 is smaller than the impedance of the bearing 20. Specifically, the bearing 20 is generally made of steel, so the guide member 30 can be a carbon rod, a superconducting material rod, or a metal member with lower impedance (such as gold, silver, copper, etc.).

[0047] During assembly, the guide member 30 is grounded and in conductive contact with the guide end face 11. The guide member 30 can be directly grounded through conductors such as wires and conductive metal sheets, or can be in conductive contact with grounded components. For example, in one embodiment, the motor includes a rear end cover, which is grounded and opposite to the guide end face 11. At this time, the guide member 30 can be installed on the rear end cover, and the guide member 30 is in conductive contact with the rear end cover and the guide end face 11 respectively. In this way, the guide member 30 can be grounded and in conductive contact with the guide end face 11 at the same time.

[0048] In summary, it can be understood that because the linear velocity at any position on the guide end surface 11 is less than or equal to the linear velocity on the outer peripheral surface of the rotating shaft 10, and even the linear velocity at the center position of the guide end surface 11 is close to zero, that is, the guide member 30 contacts the position on the rotating shaft 10 where the linear velocity is smaller, the wear degree of the guide member 30 can be reduced and the durability of the guide member 30 can be improved.

[0049] Optionally, in one embodiment, reference may be made to Figure 2 The guide member 30 at least partially extends along the axial direction of the rotating shaft 10. Specifically, in this embodiment, the guide member 30 may extend entirely along the circumferential direction of the rotating shaft 10, or only partially along the axial direction of the rotating shaft 10. The specific configuration can be flexibly selected based on actual needs.

[0050] For example, optionally, in one embodiment, the guide member 30 is columnar and extends along the axial direction of the rotating shaft 10, that is, the guide member 30 extends entirely along the axial direction of the rotating shaft 10, which makes the structure and installation of the guide member 30 relatively simple.

[0051] Alternatively, in other embodiments, the guide member 30 is bent (for example, L-shaped), a portion of the guide member 30 extends along the axial direction of the rotating shaft 10, and the extension direction of the other portion intersects with the central axis of the rotating shaft 10.

[0052] Optionally, in one embodiment, as Figure 2 or Figure 3 As shown, the central axis of the rotating shaft 10 passes through the center of the flow-guiding end surface 11, and the flow-guiding member 30 is in conductive contact with the center of the flow-guiding end surface 11. Specifically, in this embodiment, the center of the flow-guiding end surface 11 is the position where the central axis of the rotating shaft 10 is located. For example, if the flow-guiding end surface 11 is a circular surface coaxially arranged with the rotating shaft 10, the position where the center of the circle of the flow-guiding end surface 11 is located is the center of the flow-guiding end surface 11.

[0053] The guide member 30 is in conductive contact with the center of the guide end surface 11. For example, the guide member 30 can be cylindrical, and the outer diameter of the guide member 30 is smaller than the outer diameter of the guide end surface 11. During assembly, the guide member 30 is coaxially arranged with the guide end surface 11 and in conductive contact, so that the guide member 30 can be in contact with the center position of the guide end surface 11.

[0054] It can be understood that the closer the position on the rotating shaft 10 is to the center of the guide end surface 11, the smaller the linear velocity is. This can reduce the wear of the guide member 30 to a greater extent, improve the practical durability of the guide member 30, and eliminate the need for frequent inspection or replacement of the guide member 30.

[0055] Optionally, in one embodiment, as Figure 2 or Figure 3 As shown, the flow guide end surface 11 is perpendicular to the central axis of the rotating shaft 10 , which makes it convenient to abut the flow guide member 30 against the flow guide end surface 11 and helps to maintain the abutment between the flow guide member 30 and the flow guide end surface 11 .

[0056] Optionally, in one embodiment, as Figure 2 or Figure 3 As shown, the flow guide 30 is cylindrical and coaxially arranged with the flow guide end surface 11. Specifically, the flow guide 30 can be cylindrical, elliptical, or polygonal, and is coaxially arranged with the flow guide end surface 11 and in conductive contact. This ensures that the flow guide 30 is in conductive contact with the center of the flow guide end surface 11 and that there is sufficient contact area between the flow guide 30 and the flow guide end surface 11, thereby more smoothly conducting the current on the rotating shaft 10.

[0057] Of course, in some other embodiments, the flow guide member 30 may also be arranged to be inclined relative to the axial direction of the rotating shaft 10 , and one end of the flow guide member 30 abuts against the center position of the flow guide end surface 11 .

[0058] Optionally, in one embodiment, as Figure 2 As shown, the shaft current guiding structure 100 further includes an elastic member 40 , which abuts against the flow guide member 30 , and the elastic member 40 is in a compressed state and has an elastic restoring force that pushes the flow guide member 30 toward the flow guide end surface 11 along the axial direction of the rotating shaft 10 .

[0059] Specifically, in this embodiment, the elastic member 40 is a spring, the guide member 30 is columnar, and one end of the guide member 30 is in conductive contact with the guide end surface 11, and the other end squeezes the elastic member 40, so that the elastic member 40 has an elastic restoring force to push the guide member 30 toward the guide surface.

[0060] Of course, in other embodiments, the outer peripheral surface of the middle position of the guide member 30 can be provided with an abutment boss, and the elastic member 40 is partially sleeved outside the guide member 30 and abuts against the abutment boss. The guide member 30 squeezes the elastic member 40 through the abutment boss, so that the elastic member 40 has an elastic restoring force to push the guide member 30 toward the guide end face 11.

[0061] It is understood that although the wear of the flow guide 30 can be reduced by bringing the flow guide 30 into conductive contact with the flow guide end surface 11 of the rotating shaft 10, the flow guide 30 will inevitably wear out. Once worn, the flow guide 30 may lose contact with the flow guide end surface 11, and thus be unable to guide the current on the rotating shaft 10. Therefore, this embodiment provides an elastic member 40. The elastic member 40 has an elastic restoring force that pushes the flow guide 30 toward the flow guide end surface 11. Therefore, even if the flow guide 30 experiences a certain amount of wear, the elastic force of the elastic member 40 can maintain contact with the flow guide end surface 11, thereby avoiding the situation where the flow guide 30 and the flow guide end surface 11 lose contact due to wear.

[0062] It should be noted that in order to enable the elastic member 40 to remain in a compressed state, the end of the elastic member 40 away from the guide member 30 can abut against the component on which the guide member 30 is installed. For example, when the guide member 30 is directly installed on the rear end cover of the motor, the end of the elastic member 40 away from the guide member 30 can abut against the rear end cover.

[0063] For example, in one embodiment, if Figures 2 to 4As shown in any of the accompanying drawings, the shaft current guide structure 100 also includes a mounting sleeve 50, in which a slide groove 51 is provided. The slide groove 51 extends along the axial direction of the rotating shaft 10, and the guide member 30 is slidably installed in the slide groove 51. One end of the guide member 30 extends out of the slide groove 51 and is in conductive contact with the guide end face 11, and the other end compresses the elastic member 40 in the slide groove 51. One end of the elastic member 40 abuts against the bottom of the slide groove 51, and the other end abuts against the guide member 30.

[0064] It can be understood that in this embodiment, a slide groove 51 is provided in the mounting sleeve 50, and the slide groove 51 extends along the axial direction of the rotating shaft 10. The guide member 30 and the elastic member 40 are both installed in the slide groove 51. In this way, when the guide member 30 is worn, the guide member 30 can be ensured to move along the axial direction of the rotating shaft 10 under the elastic force of the elastic member 40, thereby maintaining contact with the center position of the guide end face 11. The elastic member 40 can also be limited to prevent the elastic member 40 from accidentally bouncing off and disengaging from the abutment with the guide member 30, thereby improving the reliability of the shaft current diversion structure 100.

[0065] It should be noted here that after the guide member 30 is slidably installed in the slide groove 51 of the mounting sleeve 50, in order to ensure that the guide member 30 can be grounded, the guide member 30 can still be directly grounded using conductors such as wires and metal conductive sheets, or it can be grounded through the mounting sleeve 50.

[0066] For example, optionally, in one embodiment, the mounting sleeve 50 is made of a metal material, the flow guide 30 is in conductive contact with the mounting sleeve 50, and the mounting sleeve 50 is grounded. The mounting sleeve 50 can be directly grounded using conductors such as wires and metal conductive sheets, or it can be installed on a grounded casing or end cover, so that the grounding setting of the flow guide 30 can be achieved.

[0067] Or, in another embodiment, Figure 5 As shown, the shaft current guide structure 100 also includes a mounting base 60, which is also made of metal material. The mounting sleeve 50 is fixed on the mounting base 60, and the mounting sleeve 50 is fixed on the mounting base 60 in any way, and can be screwed, clamped, bonded, etc. There is conductive contact between the guide member 30, the mounting sleeve 50 and the mounting base 60, and the mounting base 60 is grounded. Similarly, the mounting base 60 can be directly grounded using conductors such as wires and metal conductive sheets, or it can be installed on a grounded casing or end cover, so that the grounding setting of the guide member 30 can be achieved.

[0068] Optionally, in one embodiment, as Figure 3 As shown, the rotating shaft 10 has a guide end 12, and the end surface of the guide end 12 forms a guide end surface 11. This not only simplifies the structure, but also facilitates conductive contact between the guide member 30 and the guide end surface 11 during assembly.

[0069] Or, in another embodiment, Figure 2 As shown, a guide groove 121 is recessed on the end surface of the guide end 12, and the bottom of the guide groove 121 forms the guide end surface 11. One end of the guide member 30 extends into the guide groove 121 and is in conductive contact with the guide end surface 11. In this way, when the guide member 30 wears and generates dust, the guide groove 121 can catch the fallen dust, preventing the dust from scattering to other locations in the motor and contaminating the oil or causing malfunctions.

[0070] It should be noted here that if Figure 2 As shown, a cavity 13 is provided within the rotating shaft 10 for storing cooling oil, which cools the rotating shaft 10 and improves its performance and lifespan. An oil plug 14 is provided at one end of the cavity 13, near the flow guide end 12. When the oil plug 14 is installed within the rotating shaft 10, the end surface of the oil plug 14 and the inner circumferential wall of the rotating shaft 10 form a flow guide groove 121. The end surface of the oil plug 14 forms the bottom of the flow guide groove 121, i.e., the flow guide end surface 11.

[0071] Optionally, in one embodiment, as Figure 2 or Figure 3 As shown, the shaft current guiding structure 100 further includes a mounting base 60, which is provided with a dustproof groove 61. The guide member 30 is at least partially located within the dustproof groove 61. Specifically, the guide member 30 is slidably mounted within the slide groove 51 of the mounting sleeve 50, which is then fixed within the dustproof groove 61. Crucially, in this embodiment, the guide end 12 also extends into the dustproof groove 61. Thus, even if dust flows out of the guide groove 121, it can be caught by the dustproof groove 61, thereby preventing the dust from being scattered to other locations within the motor.

[0072] Optionally, in one embodiment, as Figure 2 or Figure 3 As shown, the shaft current guiding structure 100 further includes a dustproof member 70, which is disposed between the outer wall of the guide end 12 and the inner wall of the dustproof groove 61 to cover the gap between the outer wall of the guide end 12 and the inner wall of the dustproof groove 61. Specifically, the dustproof member 70 can be a brush, non-woven fabric, oil seal, etc., thereby preventing dust from flowing out of the dustproof groove 61 and thereby preventing dust from being scattered to other locations within the motor.

[0073] Alternatively, in other embodiments, as Figure 4 As shown, the rotating shaft 10 has a guide end 12, with a guide groove 121 recessed on the end surface of the guide end 12. The bottom of the guide groove 121 forms the guide end surface 11. One end of the guide member 30 extends into the guide groove 121 and is in conductive contact with the guide end surface 11. The guide member 30 is also covered with a mounting sleeve 50, which partially extends into the guide groove 121.

[0074] Specifically, in this embodiment, the flow guide 30 is slidably mounted within the slide groove 51 of the mounting sleeve 50. One end of the flow guide 30 extends out of the slide groove 51, while the other end presses the elastic member 40 within the slide groove 51. During assembly, the mounting sleeve 50 and the flow guide 30 both partially extend into the flow guide groove 121, with the flow guide 30 in conductive contact with the flow guide end surface 11. The outer diameter of the mounting sleeve 50 can be slightly smaller than the inner diameter of the flow guide groove 121.

[0075] It is understood that by providing the guide groove 121, when the guide member 30 wears and generates dust, the guide groove 121 can catch the falling dust and prevent the dust from being scattered to other locations within the motor. Because the mounting sleeve 50 also partially extends into the guide groove 121, it can further close the notch of the guide groove 121, making it difficult for dust to flow out of the guide groove 121, thereby achieving a better dust prevention effect.

[0076] Optionally, in one embodiment, as Figure 4 As shown, the shaft current guiding structure 100 further includes a dustproof member 70, which is disposed between the outer wall of the mounting sleeve 50 and the inner wall of the guide groove 121 to cover the gap between the outer wall of the mounting sleeve 50 and the inner wall of the guide groove 121. Specifically, the dustproof member 70 may be a brush, non-woven fabric, oil seal, etc., thereby further preventing dust from flowing out of the guide groove 121 and thereby preventing dust from being scattered to other locations within the motor.

[0077] Optionally, in one embodiment, the dustproof member 70 is any one of a conductive brush, a conductive non-woven fabric, and an oil seal, and the dustproof member 70 is at least partially in contact with the rotating shaft 10. The dustproof member 70 can be a conductive brush or a conductive non-woven fabric, which can be fixed to the outside of the mounting sleeve 50 and at least partially in conductive contact with the rotating shaft 10. This can prevent dust from scattering to other locations within the motor and can also divert the current on the rotating shaft 10, resulting in a better diversion effect.

[0078] Of course, the dustproof part 70 can also be an oil seal, which is fixed to the outer periphery of the mounting sleeve 50 and abuts against the inner wall of the guide groove 121. This can further improve the dustproof effect and better prevent dust from scattering to other locations in the motor.

[0079] According to the second aspect of the present application, a motor (not shown) is provided, which includes the shaft current guiding structure 100 of any one of the above embodiments. Therefore, the motor has all the beneficial effects of the above-mentioned shaft current guiding structure 100, which will not be repeated in this disclosure.

[0080] Optionally, in one embodiment, as Figure 2As shown, a cavity 13 is provided in the rotating shaft 10, and an oil plug 14 is provided in the cavity. The oil plug 14 divides the cavity 13 into an independent first chamber 131 and a second chamber 132. A flow guide end surface 11 is formed on the side of the oil plug 14 near the first chamber 131. At least part of the flow guide member 30 is located in the first chamber 131. In this way, dust generated by wear of the flow guide member 30 can be retained in the first chamber 131, preventing the dust from being scattered to other locations in the motor.

[0081] Alternatively, in one embodiment, the motor includes a housing, the rotating shaft is mounted on the housing via bearings, the shaft current conducting structure is mounted within the housing, and the impedance of the current conducting member is smaller than the impedance of the bearings. It is understood that because the impedance of the current conducting member 30 is smaller than the impedance of the bearings 20, when shaft current flows on the rotating shaft 10, the current is conducted to ground through the current conducting member 30, preventing the current from flowing into and corroding the bearings 20.

[0082] Optionally, in one embodiment, the motor includes a rotary transformer (not shown), which is mounted on the rotating shaft 10, and the flow guide 30 is detachably mounted on the housing of the rotary transformer. Specifically, in one embodiment, the housing of the rotary transformer includes a rotary transformer cover (i.e., a rotary transformer cover plate), and the flow guide 30 is detachably mounted on the rotary transformer cover. In this way, the flow guide 30 can be removed and assembled together with the rotary transformer cover, facilitating maintenance or replacement of the flow guide 30.

[0083] Optionally, in one embodiment, as Figure 6 As shown, the motor includes a detachably connected casing and a mounting cover 80. The mounting cover 80 can be a rear end cover arranged opposite to the guide end face 11, or a rotating cover arranged opposite to the guide end face 11. The bearing 20 is mounted on the casing through a bearing seat and is sleeved on the outside of the rotating shaft 10. The guide member 30 is mounted on the mounting cover 80, and the mounting cover 80 is grounded.

[0084] Specifically, the guide member 30 can be directly mounted on the mounting cover 80, or can be mounted on the mounting cover 80 via the mounting sleeve 50 and / or the mounting seat 60. For example, Figure 6 In the embodiment, the guide member 30 is slidably installed in the slide groove 51 of the installation sleeve 50, the installation sleeve 50 is fixed on the installation seat 60, and the installation seat 60 is then installed on the installation cover 80.

[0085] In this embodiment, the mounting cover 80 is grounded, so that the guide member 30 can be grounded through the mounting cover 80. Similarly, the mounting cover 80 can be directly grounded using conductors such as wires and metal conductive sheets, or it can be grounded through a conductive connection with a grounded casing.

[0086] In addition, it can be understood that because the guide member 30 is installed on the installation cover 80, the installation cover 80 is detachably connected to the casing, so the guide member 30 can be disassembled and assembled by disassembling the installation cover 80, thereby improving the convenience of disassembly and assembly of the guide member 30.

[0087] According to a third aspect of the present application, an electric assembly (not shown) is provided, which includes a reducer (not shown) and a motor (not shown), the motor including a rotating shaft 10 and a flow guide 30, the rotating shaft 10 including an output end and a non-output end, the output end of the rotating shaft is connected to the reducer, and one end of the non-output end of the rotating shaft in the axial direction has a flow guide end surface 11, and the flow guide 30 is grounded and in conductive contact with the flow guide end surface 11.

[0088] Among them, the specific structure of the reducer and the motor can be designed with reference to relevant existing technologies. The key to the technical concept of this application is that the guide member 30 is set at the non-output end of the rotating shaft 10, the guide member 30 is grounded, and the guide member 30 is in conductive contact with the guide end face 11 located at the non-output end of the rotating shaft 10. In this way, the current on the rotating shaft 10 can be conducted away through the guide member 30, and will not interfere with the transmission between the rotating shaft 10 and the reducer.

[0089] According to the fourth aspect of the present application, a vehicle (not shown) is provided, which includes the above motor, and the motor includes the shaft current conducting structure 100 of any one of the above embodiments. Therefore, the vehicle has all the beneficial effects of the above shaft current conducting structure 100, and the present disclosure will not repeat them here.

[0090] It should be noted that the vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and this disclosure does not make any specific limitations on this.

[0091] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0092] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0093] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0094] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An axial current conducting structure, characterized in that: include: a rotating shaft, wherein one end of the rotating shaft in the axial direction has a flow-guiding end surface; and A flow guide is grounded and in conductive contact with the flow guide end surface.

2. The shaft current guiding structure according to claim 1, characterized in that: The flow guide member at least partially extends along the axial direction of the rotating shaft.

3. The shaft current guiding structure according to claim 2, characterized in that: The flow guide is columnar and extends along the axial direction of the rotating shaft.

4. The shaft current guiding structure according to claim 1, characterized in that: The central axis of the rotating shaft passes through the center of the flow-guiding end surface, and the flow-guiding member is in conductive contact with the center of the flow-guiding end surface.

5. The shaft current guiding structure according to claim 4, characterized in that: The flow-guiding end surface is perpendicular to the central axis of the rotating shaft.

6. The shaft current guiding structure according to claim 1, characterized in that: The axial current guiding structure further includes an elastic member, the elastic member abuts against the flow guide member, and the elastic member is used to maintain the abutment between the flow guide member and the flow guide end surface.

7. The shaft current guiding structure according to claim 6, characterized in that: The shaft current guiding structure also includes a mounting sleeve, a slide groove is provided in the mounting sleeve, the guide member is slidably installed in the slide groove, one end of the elastic member abuts against the bottom of the slide groove, and the other end of the elastic member abuts against the guide member.

8. The shaft current guiding structure according to claim 7, characterized in that: The flow guide is in conductive contact with the installation sleeve, and the installation sleeve is grounded.

9. The shaft current guiding structure according to claim 8, characterized in that: The shaft current guiding structure further includes a mounting seat, the mounting sleeve is fixed on the mounting seat, the flow guide, the mounting sleeve and the mounting seat are in conductive contact, and the mounting seat is grounded.

10. The shaft current guiding structure according to any one of claims 1 to 9, characterized in that: The rotating shaft has a flow-guiding end, and the end surface of the flow-guiding end forms the flow-guiding end surface; Alternatively, a guide groove is concavely provided on the end surface of the guide end, the bottom of the guide groove forms the guide end surface, and one end of the guide member extends into the guide groove and is in conductive contact with the guide end surface.

11. The shaft current guiding structure according to claim 10, characterized in that: The shaft current guiding structure further includes a mounting seat, the mounting seat is provided with a dustproof groove, the flow guide member is at least partially located in the dustproof groove, and the flow guide end extends into the dustproof groove.

12. The shaft current guiding structure according to claim 11, characterized in that: The shaft current guiding structure further includes a dustproof member, which is arranged between the outer wall of the guide end and the inner wall of the dustproof groove to cover the gap between the outer wall of the guide end and the inner wall of the dustproof groove.

13. The shaft current guiding structure according to any one of claims 1 to 9, characterized in that: The rotating shaft has a guide end, and a guide groove is recessed on the end surface of the guide end, and the bottom of the guide groove forms the guide end surface; one end of the guide member extends into the guide groove and is in conductive contact with the guide end surface, and the guide member is also covered with a mounting sleeve, and the mounting sleeve partially extends into the guide groove.

14. The shaft current guiding structure according to claim 13, characterized in that: The shaft current guiding structure further includes a dustproof member, which is arranged between the outer wall of the mounting sleeve and the inner wall of the guide groove to cover the gap between the outer wall of the mounting sleeve and the inner wall of the guide groove.

15. The shaft current guiding structure according to claim 12 or 14, characterized in that: The dust-proof member is any one of a conductive brush, a conductive non-woven fabric, and an oil seal, and the dust-proof member is at least partially in contact with the rotating shaft.

16. A motor, characterized in that: The invention comprises the axial current guiding structure described in any one of claims 1 to 15.

17. The motor according to claim 16, characterized in that A cavity is provided in the rotating shaft, and an oil plug is provided in the cavity. The oil plug separates the cavity into an independent first chamber and a second chamber. The guide end surface is formed on the side of the oil plug close to the first chamber, and at least part of the structure of the guide member is located in the first chamber.

18. The motor according to claim 16, characterized in that The motor includes a housing, the rotating shaft is mounted on the housing via a bearing, the shaft current guiding structure is mounted in the housing, and the impedance of the flow guide is smaller than the impedance of the bearing.

19. The motor according to claim 16, characterized in that The motor includes a rotary transformer, which is mounted on the rotating shaft, and the flow guide is detachably mounted on the housing of the rotary transformer.

20. An electric assembly, characterized in that: It includes a reducer and a motor, the motor includes a rotating shaft and a flow guide, the rotating shaft includes an output end and a non-output end, the output end of the rotating shaft is connected to the reducer, one end of the non-output end of the rotating shaft in the axial direction has a flow guide end surface, and the flow guide is grounded and in conductive contact with the flow guide end surface.

21. A vehicle, characterized in that: Including the electric assembly as described in claim 20.

Images