Motor structure, electric drive system and electric vehicle

Abstract

The utility model discloses a motor structure, an electric drive system and an electric vehicle, which belong to the technical field of electric equipment, and comprise a casing, an armature assembly in the casing, a rear end cover at the end part of the casing, a wiring space arranged on the rear end cover, a first mounting port and a second mounting port arranged on the wiring space, and a wiring seat arranged at the first mounting port, a plug connector is installed in the wire holder and comprises a connecting end and an extending end, the connecting end is connected with a UVW phase line, the extending end is provided with a threaded hole for connecting a screw rod of a bolt, an external power cable extends into the wiring space through the second installation opening, a power cable terminal is fixed to the end of the external power cable, and a terminal connecting piece with a bolt hole is arranged on the power cable terminal. The nut of the bolt crimps the terminal connecting piece on the extending end. The plug connector and the power cable terminal are in bolt connection, so that electric connection between the UVW phase line and the external power cable is facilitated, circulation of the motor structure between assembly procedures is facilitated, connection is more reliable, and contact is tighter.

Description

Technical Field

[0001] The utility model relates to the technical field of electric equipment, in particular to a motor structure, an electric drive system and an electric vehicle. Background Art

[0002] In traditional AC motors, the UVW phase lines of the armature assembly and the external power cables are connected by crimping them in advance and then assembled on the motor casing. They are then led out to the outside of the motor through the holes in the rear end cover of the motor. Since the armature assembly has a long lead wire (with an external power cable), the flow between assembly processes is extremely inconvenient, the processing and preparation process is relatively cumbersome, and it is not convenient for the tooling design of the assembly production line.

[0003] To this end, the patent number is "201920794225.7", and the patent name is "Motor structure and electric vehicle". A plug-in method is disclosed to connect the UVW phase line with the external power cable. Specifically, a terminal block, a first connector and a second connector are additionally designed. The terminal block is installed on the rear end cover and is used to be sleeved on the first connector and the UVW phase line. One end of the first connector is used for crimping with the UVW phase line, and the other end is provided with a female connector. One end of the second connector is used for fixed connection with the external power cable, and the other end is provided with a male connector. In this way, by first connecting the first connector to the UVW phase line, and then installing the armature assembly with the casing and the rear end cover, and connecting the second connector to the external power cable at the same time, the subsequent insertion of the male connector into the female connector completes the plug-in connection of the UVW phase line and the external power cable. In this way, it is convenient for the motor structure to flow between assembly processes, and it can also help to improve the tooling design of the motor structure assembly production line.

[0004] However, in the above patent, there are many problems with the plug-in method of the male and female connectors: First, because the current conduction on the connector terminal is achieved by matching the dimensions of the male and female ends, and there must be tolerances in the dimensions of the male and female ends, there is a risk of reliability of the connection; Second, even if there is no tolerance, this male and female plug-in method itself has the risk of separation, especially in the application scenarios of high-voltage and high-frequency motors, the above reliability risks will increase. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned technical problems and to provide a motor structure, an electric drive system and an electric vehicle. The connector on the UVW phase line and the power cable terminal on the external power cable are connected by bolts, which not only facilitates the electrical connection between the UVW phase line and the external power cable, but also facilitates the flow of the motor structure between assembly processes. Moreover, compared with plug-in, it is more reliable and can ensure close contact between the terminal connector and the connector without the risk of disconnection.

[0006] To achieve the above-mentioned purpose, the utility model provides the following solution: the utility model discloses a motor structure, including a casing, an armature assembly arranged in the casing, and a rear end cover arranged at the end of the casing, the rear end cover is provided with a wiring space, the wiring space is provided with a first mounting port connected to the casing and a second mounting port for an external power cable to extend into, a wiring seat is installed at the first mounting port, a plug-in connector is installed in the wiring seat, the plug-in connector includes a connecting end connected to the UVW phase lines of the armature assembly and an extended end extending out of the wiring seat, the extended end is provided with a threaded hole for threaded connection of a screw rod of a bolt, the end of the external power cable extending into the wiring space is fixedly connected with the power cable terminal, the power cable terminal is provided with a terminal connector, the terminal connector is provided with a bolt hole for the screw rod of the bolt to pass through, and the nut of the bolt crimps the terminal connector onto the extended end.

[0007] Preferably, a plug-in hole for the connector is provided in the wiring seat, the plug-in hole comprises a small diameter section and a large diameter section arranged in sequence, the small diameter section is close to the UVW phase line, the large diameter section is close to the wiring space, the cross-sections of the small diameter section and the large diameter section are both special-shaped sections, the connecting end of the connector matches the small diameter section, and the protruding end of the connector matches the large diameter section.

[0008] Preferably, a crimping hole for crimping with the UVW phase line is provided in the connecting end of the plug connector, and the diameter of the threaded hole is smaller than that of the crimping hole.

[0009] Preferably, a positioning groove coaxially arranged with the first mounting port is provided on the wiring space, the inscribed circle diameter of the positioning groove is larger than the aperture of the first mounting port, the wiring seat includes a plug-in end for inserting into the first mounting port and a positioning end for plugging into the positioning groove, the outer diameter of the positioning end matches the diameter of the positioning groove, and a third mounting port connected to the outside is provided on the wiring space, the third mounting port is equipped with a high-voltage cover plate capable of pressing the positioning end, and the positioning end is provided with an insertion port for the terminal connector to extend into.

[0010] Preferably, the high-voltage cover plate is fixed to the rear end cover by a first fixing member, and a sealing gasket is provided between the high-voltage cover plate and the third mounting opening.

[0011] Preferably, it also includes a rotating shaft located inside the casing, one end of the rotating shaft extends out of the casing and is provided with a skeleton oil seal, the other end of the rotating shaft extends out of the rear end cover, the rear end cover is provided with a low-pressure cover plate that covers the rotating shaft, the low-pressure cover plate is connected to the rear end cover through a second fixing member, and a sealing ring is provided between the low-pressure cover plate and the rear end cover.

[0012] Preferably, the second installation port and the external power cable are sealed by a waterproof joint.

[0013] Preferably, the rear end cover is detachably connected to the housing via a third fixing member, and a mounting gap between the rear end cover and the housing is filled with sealant.

[0014] Also disclosed is an electric drive system, comprising the above-mentioned motor structure.

[0015] Also disclosed is an electric vehicle, comprising the above motor structure.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] In this motor structure, a connector with a threaded hole is connected to the UVW phase line, a power cable terminal is connected to the external power cable connection, a terminal connector with a bolt hole is provided on the power cable terminal, and then the screw of the bolt is passed through the bolt hole and screwed into the threaded hole, so that the nut of the bolt presses the terminal connector on the connector, and the connection between the connector and the terminal connector can be completed, which is convenient for the electrical connection of the UVW phase line and the external power cable, and is beneficial to the flow of the motor structure between assembly processes. At the same time, the bolt connection method is more reliable than plug-in, which can ensure close contact between the terminal connector and the connector without the risk of disconnection. It is suitable for use scenarios in various voltage and frequency ranges, and has low requirements for the dimensional tolerances of various materials, which can reduce the risks caused by problems in the supply chain such as incoming material inspection and unqualified dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a cross-sectional view of the motor structure;

[0020] Figure 2 for Figure 1 A partial enlarged view:

[0021] Figure 3 for Figure 2 A partial enlarged view of

[0022] Figure 4 This is a side view of the motor structure (without high-voltage cover).

[0023] Description of the drawings: 1. Casing; 2. Armature assembly; 3. UVW phase line; 4. Rear end cover; 5. Terminal block; 6. Connector; 7. External power cable; 8. Power cable terminal; 9. Terminal connector; 10. High-voltage cover plate; 11. Low-voltage cover plate; 12. Rotating shaft; 13. Skeleton oil seal; 14. Waterproof joint; 15. Sealing gasket; 16. Sealing ring; 17. First fixing member; 18. Second fixing member; 19. Third fixing member; 20. Sealant; 21. Bearing; 22. Bolt; 23. Wiring space; 24. First mounting port; 25. Second mounting port; 26. Third mounting port; 27. Threaded hole; 28. Bolt hole; 29. ​​Plug-in hole; 30. Crimping hole; 31. Positioning groove; 32. Extension port. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] This embodiment provides a motor structure, such as Figures 1 to 4As shown, it includes a housing 1, an armature assembly 2, a rear end cover 4, a terminal block 5 and a connector 6. The armature assembly 2 is arranged inside the housing 1, and the rear end cover 4 is arranged at the end of the housing 1. The rear end cover 4 is provided with a wiring space 23. The wiring space 23 is provided with a first mounting port 24 and a second mounting port 25. The first mounting port 24 is connected to the inside of the housing 1. The second mounting port 25 is connected to the outside, and the external power cable 7 can extend into the wiring space 23 through the second mounting port 25. The terminal block 5 is installed at the first mounting port 24, and the connector 6 is installed in the terminal block 5. The connector 6 includes a connecting end and a protruding end. The connecting end is connected to the UVW phase line 3 of the armature assembly 2, and the protruding end extends out of the terminal block 5 and extends into the wiring space 23. The protruding end of the connector 6 is provided with a threaded hole 27 for the screw thread connection of the bolt 22. The end of the external power cable 7 extending into the wiring space 23 is fixedly connected with a power cable terminal 8, and a terminal connector 9 is provided on the power cable terminal 8, and a bolt hole 28 is provided on the terminal connector 9. After the screw rod of the bolt 22 passes through the bolt hole 28 and is screwed into the threaded hole 27, the nut of the bolt 22 can press the terminal connector 9 on the protruding end of the plug connector 6 to achieve the electrical connection between the UVW phase line 3 and the external power cable 7. The fixing method of the plug connector 6 and the terminal connector 9 by bolts 22 in the motor structure facilitates the connection between the UVW phase line 3 and the external power cable 7, and is conducive to the circulation and transportation of the intermediate components of the motor structure and the armature assembly 2 during the assembly process. In addition, the terminal connector 9 and the plug connector 6 have close contact and high reliability, which is suitable for use scenarios in various voltage and frequency ranges, and has low requirements for the dimensional tolerances of various materials, which can reduce the risks caused by problems in the supply chain such as incoming material inspection and unqualified dimensions.

[0027] Note: The flow and transportation between assembly processes refers to the process of assembling the motor structure. Since the armature assembly 2 is a product of the previous process, it may be processed in other factories. The assembly of the armature assembly 2 is not only to embed the UVW phase line 3, but also requires some processes that have environmental protection requirements. These processes need to be completed in multiple locations and factories, and finally have to be transported back to the assembly line of the motor structure. There are multiple flows during this period, involving factory circulation, logistics, packaging and other links. The traditional method is to connect the UVW phase line 3 and the external power cable 7 together, so that the lead wire of the armature assembly 2 is very long, and the subsequent circulation and other scenes are very inconvenient.

[0028] In this embodiment, Figures 1 to 4As shown, there is a plug-in hole 29 in the wiring seat 5, and the plug-in hole 29 is used for plugging in the plug-in component 6. The plug-in hole 29 includes a small diameter section and a large diameter section arranged in sequence, the small diameter section is close to the UVW phase line 3, and the large diameter section is close to the wiring space 23. The cross-sections of the small diameter section and the large diameter section are both special-shaped sections. The connecting end of the plug-in component 6 matches the small diameter section, including matching in size and shape, and the connecting end of the plug-in component 6 is used to insert the small diameter section of the plug-in hole 29. The protruding end of the plug-in component 6 matches the large diameter section, including matching in size and shape, and the protruding end of the plug-in component 6 is used to insert the large diameter section of the plug-in hole 29. The plug hole 29 is divided into a small diameter section and a large diameter section. In this way, the small diameter section can resist the protruding end of the plug connector 6 and bear the axial force caused by the threaded hole 27 of the plug connector 6 being screwed into the bolt 22. The cross sections of the small diameter section and the large diameter section are special-shaped sections, which can position the plug connector 6 and avoid relative rotation between the plug connector 6 and the plug hole 29 when the bolt 22 is screwed in, so as to facilitate the installation of the bolt 22. The special-shaped cross section can be a polygonal shape, such as a triangle, a quadrilateral, a pentagon, etc., or any other shape with straight edges, such as a semicircle, a quadrilateral with arc edges on both sides, a gear shape, etc.

[0029] Further, in this embodiment, if Figures 1 to 4 As shown, the terminal block 5 can be made of insulating pressure-resistant plastic to play an insulating and isolating role.

[0030] In this embodiment, Figures 1 to 4 As shown, a crimping hole 30 is provided in the connection end of the plug connector 6, and the crimping hole 30 is for the UVW phase line 3 to extend into and be crimped with the connection end. The crimping is fixed by a cold pressing process, and has strong connection reliability. The diameter of the threaded hole 27 is smaller than the crimping hole 30, which can prevent the UVW phase line 3 from extending into the threaded hole 27.

[0031] In this embodiment, Figures 1 to 4As shown, a positioning groove 31 is provided on the inner wall of the wiring space 23, and the positioning groove 31 is coaxially arranged with the first installation opening 24. The inscribed circle diameter of the positioning groove 31 is larger than the aperture of the first installation opening 24. The wiring seat 5 includes a plug-in end and a positioning end, the plug-in end is inserted into the first installation opening 24, and the positioning end is plugged into the positioning groove 31. The external shape of the positioning end matches the shape of the positioning groove 31, that is, if the positioning groove 31 is a circular groove, the external shape of the positioning end is cylindrical, and if the positioning groove 31 is a polygon, the external shape of the positioning end is a polygonal column. A third installation opening 26 is provided on the wiring space 23, and the third installation opening 26 is connected to the outside. Through the third installation opening 26, internal operations can be performed in the wiring space 23, such as passing the bolt 22 through the bolt hole 28 and screwing it into the threaded hole 27. A high-voltage cover plate 10 is installed at the third installation opening 26. After the high-voltage cover plate 10 is installed, it can press the positioning end of the wiring seat 5 so that the positioning end is tightly pressed in the positioning groove 31. The positioning end is provided with an insertion opening 32 for the terminal connector 9 to be inserted into the interior of the wiring seat 5 and then crimped with the protruding end of the plug connector 6. The positioning end extends from the positioning groove 31 to the high-voltage cover plate 10, so that the wiring seat 5 is designed to be able to wrap the wiring area in the wiring space 23, which can effectively prevent materials and debris from falling into the motor during wiring and causing rework.

[0032] Further, in this embodiment, if Figures 1 to 4 As shown, the high-voltage cover plate 10 is fixed to the rear end cover 4 by a first fixing member 17, and the first fixing member 17 can be a fastener such as a bolt or a screw. A sealing gasket 15 is provided between the high-voltage cover plate 10 and the third mounting opening 26 to improve the sealing degree and realize dustproof protection of the wiring space 23.

[0033] In this embodiment, Figures 1 to 4 As shown, it also includes a rotating shaft 12, which is located inside the casing 1. One end of the rotating shaft 12 extends out of the casing 1, and a skeleton oil seal 13 is provided between the casing 1. The other end of the rotating shaft 12 extends out of the rear end cover 4, and the rear end cover 4 is provided with a low-pressure cover plate 11 that covers the rotating shaft 12. The low-pressure cover plate 11 is connected to the rear end cover 4 through a second fixing member 18, and the second fixing member 18 can be a fastener such as a bolt or a screw. A sealing ring 16 is provided between the low-pressure cover plate 11 and the rear end cover 4 to improve the sealing degree. Specifically, one end of the rotating shaft 12 is rotatably connected to the casing 1 through a bearing 21, and the other end of the rotating shaft 12 is rotatably connected to the rear end cover 4 through a bearing 21.

[0034] In this embodiment, Figures 1 to 4 As shown, the second installation port 25 and the external power cable 7 are sealed by the waterproof connector 14 to achieve waterproof and dustproof protection of the wiring space 23. The waterproof connector 14 can be freely selected from products that support or do not support shielding types. If it is matched with an external power cable 7 that supports shielding, the electromagnetic shielding requirements of the motor structure can be met.

[0035] In this embodiment, Figures 1 to 4 As shown, the rear cover 4 is detachably connected to the housing 1 through a third fixing member 19, and the third fixing member 19 can be a fastener such as a bolt or a screw. The installation gap between the rear cover 4 and the housing 1 is filled with a sealant 20. The rear cover 4 and the housing 1 are detachably connected to achieve an open assembly, which helps to improve the tooling and process design of the assembly production line.

[0036] Further, in this embodiment, if Figures 1 to 4 As shown, the connector 6 can be designed to be of standard size, and the bolts 22 matched therewith can also be of standard size to reduce costs. The design of the rear end cover 4 reserves sufficient size, and the external power cable 7 and the waterproof connector 14 can be of standard size to reduce costs. The power cable terminal 8 of the external power cable 7 can be of standard size, without customization requirements, to reduce costs. Furthermore, the other end of the external power cable 7 is supported to have a large connector or a bent copper busbar.

[0037] In this embodiment, Figures 1 to 4 As shown, during the installation process of the motor structure, the UVW phase line 3 is first connected to the connector 6, the casing 1 with the connector 6 and the armature assembly 2 are installed, and then the rear end cover 4 and the casing 1 are installed (there are other processes such as the rotor that are not marked in the actual process), and the installation gap between the rear end cover 4 and the casing 1 is filled with sealant 20, the terminal block 5 is combined with the rear end cover 4, the connector 6 can be matched and fixed with the terminal block 5, and the terminal connector 9 of the power cable terminal 8 of the external power cable 7 is fixed to the connector 6 on the terminal block 5 by bolts 22, a sealing ring 16 is used between the rear end cover 4 and the low voltage cover plate 11, and pressure is applied by the second fixing member 18 to achieve sealing, and a sealing gasket 15 is used between the rear end cover 4 and the high voltage cover plate 10, and pressure is applied by the first fixing member 17 to achieve sealing.

[0038] Example 2

[0039] This embodiment provides an electric drive system, such as Figures 1 to 4 As shown, including the motor structure in Example 1, the rest of the electric drive system can refer to any existing drive system that requires the use of a motor, such as the electric drive system of an electric vehicle or an electric control device in a factory.

[0040] Example 3

[0041] This embodiment provides an electric vehicle, such as Figures 1 to 4 As shown, including the motor structure in Example 1, the rest of the electric vehicle can refer to the existing electric vehicle settings.

[0042] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A motor structure, comprising a housing, an armature assembly arranged in the housing, and a rear end cover arranged at the end of the housing, wherein the rear end cover is provided with a wiring space, the wiring space is provided with a first mounting port connected to the housing and a second mounting port for an external power cable to extend therein, a wiring seat is installed at the first mounting port, a plug-in is installed in the wiring seat, the plug-in includes a connecting end connected to the UVW phase line of the armature assembly and an extending end extending out of the wiring seat, characterized in that: The protruding end is provided with a threaded hole for threaded connection of the screw rod of the bolt, the end of the external power cable extending into the wiring space is fixedly connected with a power cable terminal, the power cable terminal is provided with a terminal connector, the terminal connector is provided with a bolt hole for the screw rod of the bolt to pass through, and the nut of the bolt crimps the terminal connector onto the protruding end.

2. The motor structure according to claim 1, characterized in that: The wiring seat is provided with a plug-in hole for the plug-in connector, and the plug-in hole includes a small diameter section and a large diameter section arranged in sequence, the small diameter section is close to the UVW phase line, and the large diameter section is close to the wiring space, and the cross-sections of the small diameter section and the large diameter section are both special-shaped sections, the connecting end of the plug-in connector matches the small diameter section, and the protruding end of the plug-in connector matches the large diameter section.

3. The motor structure according to claim 2, characterized in that: A crimping hole for crimping with the UVW phase line is provided in the connection end of the plug connector, and the diameter of the threaded hole is smaller than that of the crimping hole.

4. The motor structure according to claim 3, characterized in that: The wiring space is provided with a positioning groove coaxially arranged with the first mounting port, the inscribed circle diameter of the positioning groove is larger than the aperture of the first mounting port, the wiring seat comprises a plug-in end for inserting into the first mounting port and a positioning end for plugging into the positioning groove, the outer diameter of the positioning end matches the diameter of the positioning groove, the wiring space is provided with a third mounting port connected to the outside, the third mounting port is installed with a high-voltage cover plate capable of pressing the positioning end, and the positioning end is provided with an insertion port for the terminal connector to extend into.

5. The motor structure according to claim 4, characterized in that: The high-pressure cover plate is fixed to the rear end cover by a first fixing member, and a sealing gasket is provided between the high-pressure cover plate and the third mounting opening.

6. The motor structure according to claim 4, characterized in that: It also includes a rotating shaft located inside the casing, one end of the rotating shaft extends out of the casing and is provided with a skeleton oil seal, the other end of the rotating shaft extends out of the rear end cover, the rear end cover is provided with a low-pressure cover plate that covers the rotating shaft, the low-pressure cover plate is connected to the rear end cover through a second fixing member, and a sealing ring is provided between the low-pressure cover plate and the rear end cover.

7. The motor structure according to claim 1, characterized in that: The second installation port and the external power cable are sealed by a waterproof joint.

8. The motor structure according to claim 1, characterized in that: The rear end cover is detachably connected to the housing via a third fixing member, and a mounting gap between the rear end cover and the housing is filled with sealant.

9. An electric drive system, characterized in that: The motor structure comprises any one of claims 1 to 8.

10. An electric vehicle, characterized in that: The motor structure comprises any one of claims 1 to 8.

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