Three-phase terminal block, drive assembly and vehicle

Abstract

The present invention provides a three-phase terminal block, a drive assembly and a vehicle, including a terminal block body and three single-phase terminal posts. The terminal block body extends in a cylindrical shape, and the three single-phase terminal posts are arranged along the axial direction of the terminal block body. The three single-phase terminal posts are provided on the outer periphery of the terminal block body, and a first terminal and a second terminal are respectively arranged at both axial ends of the single-phase terminal post on the terminal block body. Since the stator has a three-phase winding, the three single-phase terminal posts are arranged on the outer periphery of the terminal block body, and then the three single-phase terminal posts can be correspondingly connected to the terminal ends of the stator, thereby optimizing the wiring layout, and the space between the three single-phase terminal posts can be used to place spaces such as bearings, thereby improving the compactness of the structural layout.

Description

Technical Field

[0001] The present invention relates to the field of new energy, and particularly to a three-phase terminal block, a drive assembly, and a vehicle. Background Art

[0002] New energy vehicles have many characteristics such as environmental protection and low pollution because they do not burn gasoline or diesel to generate power. With the popularization and application of new energy power generation such as water energy, wind energy, solar energy, and nuclear energy, many new energy vehicles are gradually being popularized and applied, such as new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail transit vehicles, new energy electric flying vehicles, new energy electric shipping vehicles, etc.

[0003] New energy vehicles are generally equipped with a battery, a motor control device, a motor, and a power generation device. The power tubes in the motor control device receive the direct current output by the battery and invert and convert the direct current into alternating current for output to the motor. Then, the motor outputs a rotational driving force to drive the power generation device such as wheels and propellers, and then drives the vehicle to move forward.

[0004] With the integration of the drive assembly, that is, the motor and the motor control device, in vehicles, the occupied space of the components can be further optimized and reduced, so as to free up more space for use in the passenger space, battery space, etc. When integrating the motor and the motor controller, it is necessary to consider the connection structure between the motor and the motor controller and the related layout optimization, and it is necessary to consider the cooling of both the motor and the motor controller, as well as the optimized layout of the related electrical connection structure. Moreover, the assembly convenience of the components also needs to be considered to achieve the efficient integration of the drive assembly. Summary of the Invention

[0005] The first object of the present invention is to provide a three-phase terminal block that optimizes the wiring layout by using circumferentially distributed terminal posts.

[0006] The second object of the present invention is to provide a drive assembly equipped with the above three-phase terminal block.

[0007] The third object of the present invention is to provide a vehicle equipped with the above drive assembly.

[0008] To achieve the first object of the present invention, the present invention provides a three-phase terminal block, which includes a terminal block body and three single-phase terminal posts. The terminal block body extends in a cylindrical shape, and the three single-phase terminal posts are arranged along the axial direction of the terminal block body. The three single-phase terminal posts are provided on the outer periphery of the terminal block body, and the first terminal and the second terminal are respectively provided at both axial ends of the terminal block body for the single-phase terminal posts.

[0009] As can be seen from the above solution, since the stator has three-phase windings, three single-phase terminals are arranged on the outer periphery of the terminal block body. Subsequently, the three single-phase terminals can be correspondingly connected to the wiring ends of the stator, thereby optimizing the wiring layout. Moreover, the space between the three single-phase terminals can be used to place components such as bearings, thus improving the compactness of the structural layout.

[0010] A further solution is that a wiring groove is provided inside the terminal block body; in the axial projection of the terminal block body, the first wiring end is located on the outer periphery of the wiring groove, and the second wiring end is located inside the wiring groove.

[0011] As can be seen from the above, by having the first wiring end and the second wiring end located on the outer and inner sides of the wiring groove respectively, the first wiring end is arranged in a dispersed layout circumferentially to avoid the bearing, while the second wiring end is arranged in a compact layout circumferentially to centralize the connection to the motor control device, improving the utilization rate of the circuit layout of the motor controller.

[0012] A further solution is that the terminal block body includes a middle ring part, an outer connection part, and an inner connection part. The middle ring part is arranged in a ring shape and encloses the wiring groove. The inner connection part extends from the middle ring part into the wiring groove, and the outer connection part extends from the middle ring part outside the wiring groove; the single-phase terminal passes through the middle ring part, the first wiring end is located at the outer connection part, and the second wiring end is located at the inner connection part.

[0013] A further solution is that both the outer connection part and the first wiring end are located on the axial outer side of the middle ring part.

[0014] A further solution is that the three single-phase terminals are connected to the middle ring part, the outer connection part, and the inner connection part through a two-shot injection molding process.

[0015] As can be seen from the above, by using the settings of the middle ring part, the outer connection part, and the inner connection part and the production of two-shot injection molding, the middle ring part, the outer connection part, and the inner connection part are wrapped outside the single-phase terminal, thereby improving the protection between the two wiring ends. Also, the middle ring part can be used to install and position other components. Moreover, the outer connection part and the first wiring end extend outwards on the axial outer side and radial outer side of the middle ring part, so space can be provided for the bearing or resolver, thus improving the space utilization rate.

[0016] A further solution is that a retaining wall is provided on the outer periphery of the first wiring end of the outer connection part.

[0017] As can be seen from the above, the retaining wall can provide a certain positioning and limiting for the wiring, and also play the role of insulating the wiring end of the stator, improving the connection stability.

[0018] A further solution is that an installation part is also provided inside the wiring groove, and the installation part is located on one side of the second wiring end.

[0019] As can be seen from the above, the three-phase terminal block can be installed and fixed in the drive assembly through the installation part, and the arrangement of the installation part on one side of the second terminal is convenient for the installation and disassembly operations.

[0020] A further solution is that a magnetic ring is further provided on the outer periphery of the terminal block body.

[0021] As can be seen from the above, since devices such as a resolver can be installed on the terminal block body, a magnetic ring is provided on the outer periphery of the terminal block body to reduce electromagnetic interference.

[0022] To achieve the second object of the present invention, the present invention provides a drive assembly, and the drive assembly includes the three-phase terminal block of the above solution.

[0023] To achieve the third object of the present invention, the present invention provides a vehicle, and the vehicle includes the drive assembly of the above solution. Description of the Drawings

[0024] Figure 1 is a structural diagram of an embodiment of the drive assembly of the present invention.

[0025] Figure 2 is a structural diagram of the drive assembly embodiment of the present invention from another perspective.

[0026] Figure 3 is an exploded view of the drive assembly embodiment of the present invention.

[0027] Figure 4 is a structural diagram of the housing of the drive assembly embodiment on the side of the motor installation cavity.

[0028] Figure 5 is a structural diagram of the housing of the drive assembly embodiment on the side of the control installation cavity.

[0029] Figure 6 is a structural diagram of the three-phase terminal block of the drive assembly embodiment of the present invention.

[0030] Figure 7 is a structural diagram of the three-phase terminal block of the drive assembly embodiment of the present invention from another perspective.

[0031] Figure 8 is an exploded view of the three-phase terminal block of the drive assembly embodiment of the present invention.

[0032] Figure 9 is a structural diagram of the outer peripheral wall of the housing of the drive assembly embodiment of the present invention.

[0033] Figure 10 is a radial cross-sectional view of the drive assembly embodiment of the present invention at the partition wall.

[0034] Figure 11It is an axial cross-sectional view at the three-phase terminal block in the drive assembly embodiment of the present invention.

[0035] Figure 12 It is a structural diagram of the three-phase terminal block and the motor control device in the drive assembly embodiment of the present invention.

[0036] Figure 13 It is an exploded view of the three-phase terminal block and the motor control device in the drive assembly embodiment of the present invention.

[0037] Figure 14 It is an exploded view of the power tube device in the drive assembly embodiment of the present invention.

[0038] Figure 15 It is a radial cross-sectional view at the power tube in the drive assembly embodiment of the present invention.

[0039] Figure 16 It is an exploded view of the laminated busbar assembly in the drive assembly embodiment of the present invention.

[0040] Figure 17 It is a structural diagram of the motor control device in the drive assembly embodiment of the present invention after omitting the main circuit board.

[0041] Figure 18 It is a structural diagram of the drive assembly embodiment of the present invention from the rear side view of the shaft after omitting the machine cover.

[0042] Figure 19 It is an exploded view of the motor control device and the outgoing line assembly in the drive assembly embodiment of the present invention.

[0043] Figure 20 It is an axial cross-sectional view of the drive assembly embodiment of the present invention.

[0044] The present invention will be further described below in conjunction with the drawings and embodiments. Specific Embodiments

[0045] Drive assembly embodiment:

[0046] Referring to Figures 1 to 3 , the drive assembly includes a housing 1, a machine cover 18, a shell cover 14, a motor control device 3, a bearing 17, a rotor 16, and a stator 15. Referring to Figure 4 and Figure 5 , and in combination with Figure 11, the housing 1 is arranged in a cylindrical shape. There is a cavity arranged axially inside the housing 1. The inner wall of the housing 1 is provided with a partition wall 11 radially. The partition wall 11 divides the cavity into a motor installation cavity 121 and a control installation cavity 122. The partition wall 11 is provided with a mounting hole 111 in the middle along the axis. The partition wall 11 extends and is provided with a mounting ring wall 112 towards the motor installation cavity 121 on the outer periphery of the mounting hole 111. The mounting ring wall 112 and the partition wall 11 form a mounting step on the inner side. A bearing 17 (the structure is not specifically shown) is arranged on the inner upper part of the mounting ring wall 112. The partition wall 11 is provided with three wiring holes 113 and three wire passing holes 114 in a penetrating manner. The diameter of the wiring hole 113 is larger than that of the wire passing hole 114. The three wiring holes 113 and the three wire passing holes 114 are evenly distributed at intervals along the outer periphery of the bearing 17 in a staggered manner. The mounting ring wall 112 is provided with a first avoidance groove 116 at each wiring hole 113. The first avoidance groove 116 is arranged in an arc-shaped concave manner. The partition wall 11 is provided with three second avoidance grooves 115 on the first end wall facing the motor installation cavity 121. The extending direction of the second avoidance groove 115 is arranged obliquely to the meridian. The extending directions of two adjacent second avoidance grooves 115 are arranged at an acute angle (preferably 60 degrees). The second avoidance groove 115 extends from the wiring hole 113 towards the inner wall of the housing 1 and the stator 15. The width of the second avoidance groove 115 is the same as the diameter of the wiring hole 113. The machine cover 18 covers the outside of the control installation cavity 122 and is fixedly connected to the housing 1.

[0047] At the control installation cavity 122 on the opposite side of the motor installation cavity 121, the partition wall 11 extends and is provided with a positioning ring wall 117 towards the control installation cavity 122 on the outer periphery of the mounting hole 111. The positioning ring wall 117 is located on the second end wall of the partition wall 11 facing the control installation cavity 122. The partition wall 11 is provided with three mounting platforms 118 on the outer side of the positioning ring wall 117. The cross-section of the mounting platform 118 is arranged in a bow shape. The mounting platform 118 is provided with a hollow in the middle. One mounting platform 118 is located between two adjacent wiring holes 113. A fixing hole 119 is arranged on the inner side of the mounting platform 118. The three fixing holes 119 are also evenly distributed along the circumference.

[0048] Refer to Figures 6 to 8 , and in combination with Figure 11, the three-phase terminal block 2 includes a terminal block body 21 and three single-phase terminals 22. The terminal block body 21 can be roughly cylindrically extended. The terminal block body 21 is injection-molded from an insulating material such as plastic. The terminal block body 21 includes a middle ring portion 211, three external connection portions 212, and three internal connection portions 213. The middle ring portion 211 is arranged in a ring shape and encloses a wiring groove 241. An annular convex edge is provided on the outer circumference of the middle ring portion 211. The middle ring portion 211 and the annular convex edge form an annular mounting step 242. The magnetic ring 28 is arranged at the mounting step 242. The internal connection portion 213 extends from the middle ring portion 211 into the wiring groove 241. The three internal connection portions 213 are evenly arranged in the circumferential direction. The external connection portion 212 extends from the middle ring portion 211 outside the wiring groove 241. Moreover, the three external connection portions 212 not only extend axially outward but also extend radially outward. The three external connection portions 212 are evenly arranged in the circumferential direction. One external connection portion 212 and one internal connection portion 213 are arranged along the same radial plane.

[0049] The single-phase terminal 22 extends axially. The single-phase terminal 22 includes a connection portion 221, a first connection end 222, and a second connection end 223. The connection portion 221 is connected between the first connection end 222 and the second connection end 223. The connection portion 221 is bent inward from the first connection end 222 towards the second connection end 223. The first connection end 222 and the second connection end 223 are respectively cylindrically arranged and provided with connection holes. The single-phase terminal 22 passes through the middle ring portion 211. The first connection end 222 is located at the external connection portion 212, and the second connection end 223 is located at the internal connection portion 213. Moreover, the three single-phase terminals 22 are connected to the middle ring portion 211, the external connection portion 212, and the internal connection portion 213 through a secondary injection molding process. Then, the middle ring portion 211, the external connection portion 212, and the internal connection portion 213 surround the single-phase terminal 22 to achieve corresponding insulation. The first connection end 222 and the second connection end 223 are respectively located at the axial two ends of the terminal block body 21. In the axial projection of the terminal block body 21, the three first connection ends 222 and the three first connection ends 222 are located outside the circumference of the wiring groove 241, and the three second connection ends 223 and the three second connection ends 223 are located inside the wiring groove 241. The external connection portion 212 is provided with a stop wall 214 on the outer circumference of the first connection end 222. The stop wall 214 is arranged in an arc-shaped extension.

[0050] A wiring clip 23 is further provided at the first connection end 222. The wiring clip 23 is provided with a connection hole for connecting and cooperating with the first connection end 222, and is also provided with a U-shaped clip portion 232. Three mounting portions 26 are further provided in the wiring groove 241. The three mounting portions 26 are evenly distributed axially. The mounting portion 26 is located on the circumferential side of the second connection end 223.

[0051] Refer to Figure 9 and Figure 10, a liquid cooling channel is provided on the outer wall of the housing 1. The liquid cooling channel includes a motor cooling tank 139 and a control cooling tank 132. The motor cooling tank 139 is located on the outer wall of the motor installation cavity 121, and the control cooling tank 132 is located on the outer wall of the control installation cavity 122. Heat conducting columns are respectively arranged in the motor cooling tank 139 and the control cooling tank 132 to increase the heat conducting area. A plurality of spaced cooling tanks 133 are arranged in the partition wall 11, and the plurality of spaced cooling tanks 133 are distributed circumferentially. The spaced cooling tank 133 is provided with an opening at the outer wall and is kept closed within the partition wall 11. The spaced cooling tank 133 is located between the motor cooling tank 139 and the control cooling tank 132, and the outer ends of the spaced cooling tank 133, the outer ends of the motor cooling tank 139 and the outer ends of the control cooling tank 132 are communicated with each other.

[0052] The plurality of spaced cooling tanks 133 respectively extend towards the bearing 17. Due to the need to avoid the first wiring terminal 222 and the fixing hole 114, the depths of different spaced cooling tanks 133 are different. The circumferential length of the outer end of the spaced cooling tank 133 is greater than the circumferential length of the inner end of the spaced cooling tank 133. The outer ends of the spaced cooling tank 133 and the outer ends of the liquid cooling channel are both arranged in an open manner. The housing cover 14 covers the outer wall of the housing 1, and the housing cover 14 is located outside the spaced cooling tank 133 and the liquid cooling channel, thereby realizing the communication between the outer ends of the spaced cooling tank 133, the outer ends of the motor cooling tank 139 and the outer ends of the control cooling tank 132. The outer ends of the spaced cooling tank 132 are provided with mounting grooves 1321 on both sides.

[0053] A flow guiding baffle 134 is arranged in the spaced cooling tank 133. The flow guiding baffle 134 extends inwards from the outside in a straight sheet shape, and a flow guiding groove 1343 is arranged at the outer end of the flow guiding baffle 134. The flow guiding groove 1343 is close to the outer end of the spaced cooling tank 133. The flow guiding baffle 134 is provided with clamping protrusions 1341 on both sides of the flow guiding groove 1343. The clamping part is located at the clamping protrusion 1341, and the clamping part of the clamping protrusion 1341 is located in the mounting groove to realize the limiting fit. The inner end 1344 of the flow guiding baffle 134 and the inner end of the spaced cooling tank 133 reserve a certain flow space. A through hole 1342 is arranged in the middle of the flow guiding baffle. The through hole 1342 is used for the circulation of the coolant. When the coolant flows through the outer end of the spaced cooling tank 133, it can be formed into a flow direction by the comprehensive action of the flow guiding baffle 134, the through hole 1342 and the flow guiding groove 1343, so as to flow into the inner end of the spaced cooling tank 133, thereby improving the heat dissipation efficiency.

[0054] On the outer wall of the housing 1, there is a flow channel opening 135 near the control installation cavity 122. An interface module 137 is connected outside the flow channel opening 135. The interface module 137 is used to connect to the liquid cooling circulation system. On the outer wall of the housing 1, there is an interface 136 located on one side of the motor installation cavity 121. Both the interface 136 and the flow channel opening 135 are connected to the liquid cooling flow channel.

[0055] Referring to Figure 11 , and in combination with Figure 20 , the drive assembly further includes a chamber cover 25 and a resolver 27. The resolver 27 is arranged in the mounting hole 111, on the side of the bearing 17 close to the control installation cavity 122. The rotating shaft of the rotor 16 is connected to the resolver 27, and the resolver 27 is electrically connected to the motor control device 3. The chamber cover 25 covers the mounting hole 111 and is connected to the partition wall 11. The middle part of the chamber cover 25 has a baffle, which is designed to be detachable. The chamber cover 25 covers the resolver 27 on the side of the control installation cavity 122. The chamber cover 25 is provided with an interface groove, and a signal connection terminal 252 is arranged in the interface groove. The connection interface of the resolver 27 is connected to the signal connection terminal 252. And on the corresponding position of the main circuit board 43, there is a signal wiring seat 435. The signal connection terminal 252 is located between the single-phase connection end and the positive and negative connection ends, which facilitates the connection with the signal wiring seat 435.

[0056] After the three-phase wiring seat 2 is installed on the partition wall 11, the three first wiring terminals 222 respectively pass through the wiring holes 113. The middle ring part 221 of the three-phase wiring seat 2 is sleeved outside the positioning ring wall 117, and is sleeved outside the chamber cover 25, and is sleeved outside the resolver 27, that is, the resolver 27 is located in the wiring groove 241, and the magnetic ring 28 is located outside the resolver 27.

[0057] Then the three-phase wiring seat 2 is installed at the side of the mounting hole 111 close to the control installation cavity 122, and is connected to the fixing hole 119 through the screw passing through the mounting part 26 and the positioning hole 251 of the chamber cover 25. Then the three first wiring terminals 222 are relatively dispersedly distributed on the outer circumference of the bearing 17, and the three second wiring terminals 223 are relatively concentratedly distributed. The three single-phase wiring posts 22 are connected between the motor control device 3 and the stator 15. And in the axial projection of the bearing 17, the three single-phase wiring posts 22, the three wiring holes 113 and the three wire passing holes 114 are all located between the bearing 17 and the stator 15.

[0058] The stator 15 has a winding, and the winding has leads and terminals. The terminals of the stator are located at the second avoidance groove 115 and are connected to the first connection part 222. Potting glue 19 is filled between the mounting ring wall 112, the partition wall and the inner wall of the housing, so that the potting glue 19 covers the three first connection parts 222, the three connection holes, the three fixing holes, the terminals of the stator and the end of the winding close to the partition wall. Thus, in addition to improving the protection and waterproof performance, it can also achieve a certain amount of waste heat conduction and the fixing of components.

[0059] Referring to Figures 12 to 13 , the three-phase connection base 2 is arranged in the middle of the motor control device 3. The motor control device 3 includes a circuit board assembly, a plurality of capacitors 45, a plurality of power transistors 34, a pressing member 32, a positioning frame 33 and a mounting housing 31. The circuit board assembly can adopt conventional laminated copper circuits, etc. In this embodiment, the circuit board assembly adopts a laminated busbar assembly 4. The laminated busbar assembly 4 includes a main circuit board 43, a positive connection plate 41, a negative connection plate 42 and a three-phase connection plate assembly 44. The main circuit board 43 is provided with copper-clad lines, circuit components and pads, and the copper-clad lines, circuit components and pads constitute a control circuit.

[0060] Referring to Figure 14 and Figure 15 , and in combination with Figure 5 , the motor control device 3 is arranged in the motor installation cavity 122. The inner wall of the control installation cavity 122 is provided with a plurality of heat-conducting planes 125. The heat-conducting planes 125 are arranged as flat surfaces. The plurality of heat-conducting planes 125 are connected in sequence along the circumferential direction. An avoidance groove 126 is arranged between two adjacent heat-conducting planes 125. The housing 1 is provided with a ring wall 124 on the inner side of the inner wall of the control installation cavity 122. A power installation groove 123 is formed between the ring wall 124 and the inner wall of the control installation cavity 122, and the power installation groove 123 extends in a ring shape.

[0061] The positioning frame 33 includes an annular substrate 331 and a plurality of spacer bars 333. The annular substrate 331 is arranged in a plane and extends along the ring shape. The annular substrate 331 is uniformly provided with bumps 332 along the circumferential direction on the inner side. The plurality of spacer bars 333 all extend along the axial direction and are arranged on the annular substrate 331. The plurality of spacer bars 333 are distributed along the circumferential direction. The annular substrate 331 is adjacent to the partition wall 11. The spacer bars 333 are located on the side opposite to the partition wall 11. The cross-section of the spacer bars 333 along the radial direction is arranged in a T shape. The positions of the spacer bars 333 and the positions of the bumps 332 are located on the same radial plane.

[0062] The circumferentially arranged holding members 32 include a circular base 321 and a plurality of holding portions 322. The circular base 321 is arranged in a sheet shape, extends axially and circumferentially in a ring shape. The holding portions 322 are arranged in a sheet shape, and the plurality of holding portions 322 are arranged on the circular base 321 in a circumferential distribution. The holding portion 322 includes a fixing portion, an abutting portion and a free portion. The fixing portion is connected to the circular base 321. The abutting portion extends outward from the fixing portion toward the outer side of the circular base 321. The free portion is located at the outer end of the abutting portion. The abutting portion is located between the fixing portion and the free portion. The abutting portion is arranged in an arc shape, protrudes toward the outer side of the circular base 321, and also protrudes radially toward the inner wall of the housing 1. Then both the fixing portion and the free portion are located on the inner side of the abutting portion. A first groove 323 is provided between two adjacent holding portions 322. The first groove 323 extends axially. Two adjacent holding portions 322 form a device holding group, and one device holding group is used to hold one power transistor 34. A second groove 324 is provided between two adjacent device holding groups. The second groove 324 extends axially, and the axial length of the second groove 324 is greater than the axial length of the first groove 323.

[0063] The positioning frame 33, the plurality of power transistors 34 and the holding members 32 are all arranged in the power installation groove 123. The circular base plate 331 of the positioning frame 33 is located at the bottom of the power installation groove 123. The plurality of power transistors 34 are arranged circumferentially along the control installation cavity 122. The package of the power transistor 34 is connected to the heat conduction plane 125, and a heat conduction sheet 35 is provided between the package of the power transistor 34 and the heat conduction plane 125. The heat conduction sheet 35 can be made of silicone or ceramic. A spacer 333 is located between two adjacent power transistors 34, that is, the power transistor 34 can be limited by the spacers 333 on both sides. The holding portion 322 is located on the side close to the ring wall 124. The holding portion 322 abuts between the ring wall 124 and the power transistor 34 and applies an outward elastic force to the power transistor 34, and the second groove 324 is in limiting cooperation with the bump 332. The main circuit board 43 is arranged in a circular shape. The pins of the power transistor 34 pass through the outer circumference of the main circuit board 43 and are welded.

[0064] Refer to Figure 16 and Figure 17, the installation housing 31 is arranged in a bottomed cylindrical shape. The installation housing 31 is provided with an inner ring wall 312 in the middle. The inner ring wall 312 encloses a third avoidance hole 3121. The installation housing 31 is provided with an outer ring wall 311 on the outer periphery of the inner ring wall 312. And an annular bottom 313 is provided between the outer ring wall 311 and the inner ring wall 312. An installation accommodation cavity is formed among the outer ring wall 311, the inner ring wall 312 and the bottom 313. The installation housing 31 is provided with a positioning post assembly along the axial direction on the bottom. The positioning post assembly includes a plurality of first positioning posts 314 and a plurality of second positioning posts 315. The plurality of first positioning posts 314 are distributed circumferentially. The plurality of second positioning posts 315 are distributed circumferentially. The plurality of second positioning posts 315 are all located outside the plurality of first positioning posts 314. The diameter of the first positioning post 314 is smaller than that of the second positioning post 315. The plurality of first positioning posts 314 and the plurality of second positioning posts 315 respectively pass through the positive electrode connection plate 41, the negative electrode connection plate 42 and the three-phase connection plate assembly 44.

[0065] A capacitance positioning cavity is formed between two adjacent first positioning posts 314 and two adjacent second positioning posts 315 adjacent to them. The radial connection line between a first positioning post 314 and the adjacent first second positioning post 315 passes through the axis of the installation housing 31. The plurality of first positioning posts 314 and the plurality of second positioning posts 315 are arranged in a radial pattern. A capacitor 45 is located in a capacitance positioning cavity, that is, between two first positioning posts 314 and two second positioning posts 315.

[0066] The installation housing 31 is provided with three connection fixing platforms 317 at the top of the inner ring wall 312 and located within the third avoidance hole 3121. The three connection fixing platforms 317 are evenly arranged circumferentially. And a receiving step 316 is provided outside each connection fixing platform 317. It is used to receive the positive electrode connection plate 41 and cooperate with the receiving platform 418. The connection fixing platform 317 is provided with a positive electrode connection position 319 and a negative electrode connection position 318. Connection nuts are respectively provided at the positive electrode connection position 319 and the negative electrode connection position 318. The two connection nuts are arranged side by side. A fixing hole 3171 is provided on one side of the connection fixing platform 317 where the positive electrode connection position 319 or the negative electrode connection position 318 is located.

[0067] The installation housing 31 is provided with an outwardly protruding outer convex edge 3111 at the top of the outer ring wall 311. The outer convex edge 3111 extends in a ring shape. A bearing step 3112 is provided between the convex edge 3111 and the outer ring wall 311. The bearing step 3112 is used to receive the positive electrode connection plate 41. And a plurality of convex points 3113 are provided along the circumferential direction on the bearing step 3112.

[0068] The positive electrode connection plate 41 is arranged in the shape of a bottomed cylinder, and the whole of the positive electrode connection plate 41 is made of metal. The positive electrode connection plate 41 is provided with a first avoidance hole 410 in the middle. The positive electrode connection plate 41 is provided with an inner ring wall 413 on the outer periphery of the first avoidance hole 410. The positive electrode connection plate 41 is provided with an outer ring wall 412 on the outer periphery of the inner ring wall 413. The positive electrode connection plate 41 is provided with a bottom ring wall 414 between the inner ring wall 413 and the outer ring wall 412. The bottom ring wall 414 is connected between the inner ring wall 413 and the outer ring wall 412. An annular device accommodation cavity is formed among the bottom ring wall 414, the outer ring wall 412 and the inner ring wall 413. The device accommodation cavity is used for placing a plurality of capacitors 45, so that the plurality of capacitors 45 are distributed circumferentially, and the positive electrode connection plate 41 is arranged in a ring-shaped pot shape. The positive electrode connection plate 41 is provided with a convex edge 4121 extending radially at the outer end of the outer ring wall 412. The convex edge 4121 extends circumferentially. A plurality of positive electrode pins 411 are arranged circumferentially on the convex edge 4121. The positive electrode pins 411 extend axially, and the outer ring wall 412 is provided with a limiting groove 4122 between two adjacent positive electrode pins 411. The plurality of limiting grooves 4122 are evenly distributed circumferentially. The bottom ring wall 414 is provided with a plurality of first electrical contacts 415. The plurality of first electrical contacts 415 are distributed circumferentially. The first electrical contacts are formed by grooving the bottom ring wall 414. The first electrical contacts 415 are connected to the positive electrodes of the capacitors 45. The bottom ring wall 414 is also provided with a plurality of first positioning holes 416 and second positioning holes 417 penetrating therethrough. The plurality of first positioning holes 416 are evenly distributed circumferentially. The plurality of second positioning holes 417 are evenly distributed circumferentially. The plurality of first positioning holes 416 are located inside the first electrical contacts 415. The plurality of second positioning holes 417 are located outside the first electrical contacts 415. The first positioning post 314 passes through the first positioning holes 416, and the second positioning post 315 passes through the second positioning holes 417.

[0069] The inner ring wall 413 is provided with a receiving platform 418 at the end close to the negative electrode connection plate 42. The receiving platform 418 is used for receiving the negative electrode connection plate 42. The positive electrode connection plate 41 is provided with a positive electrode connection end 419 at the inner edge of the receiving platform 418. The positive electrode connection end 419 is arranged in the form of a flap. The positive electrode connection end 419 extends axially and then radially. The positive electrode connection end 419 is provided with a connection hole in the first avoidance hole 410.

[0070] The negative electrode connecting plate 42 is provided as a circular metal plate. A plurality of negative electrode pins 421 are arranged circumferentially on the outer edge of the negative electrode connecting plate 42. The negative electrode pins 421 extend axially. A plurality of first pin avoidance grooves 422 are provided on the outer edge of the negative electrode connecting plate 42. The plurality of first pin avoidance grooves 422 are uniformly arranged axially, and there is a positive electrode avoidance groove 422 between adjacent two negative electrode pins 421, thus achieving staggered distribution. The negative electrode connecting plate 42 is provided with a plurality of second electrical contacts 425. The plurality of second electrical contacts 425 are distributed circumferentially. The second electrical contacts 425 are formed by grooving the negative electrode connecting plate 42. The second electrical contacts 425 are connected to the negative electrode of the capacitor 45. The negative electrode connecting plate 42 is also provided with a plurality of first positioning holes 424 and second positioning holes 423 penetrating therethrough. The plurality of first positioning holes 424 are uniformly distributed circumferentially. The plurality of second positioning holes 423 are uniformly distributed circumferentially. The plurality of first positioning holes 424 are located inside the second electrical contacts 425. The plurality of second positioning holes 423 are located outside the second electrical contacts 425. The first positioning post 314 passes through the first positioning holes 424, and the second positioning post 315 passes through the second positioning holes 423. The negative electrode connecting plate 42 is provided with a second avoidance hole 426 in the middle. The first avoidance hole 410 is communicated with the second avoidance hole 426. The negative electrode connecting plate 42 is provided with a negative electrode connection end 427 at the inner edge of the second avoidance hole 426. The negative electrode connection end 427 is arranged as a flap. The negative electrode connection end 427 extends axially and then extends radially. The negative electrode connection end 427 is provided with a connection hole in the second avoidance hole 426.

[0071] The three-phase connecting plate assembly 44 includes three single-phase connecting plates 441. The three single-phase connecting plates 441 are provided as arcuate metal plates, and of course, they can also be arranged in a fan shape. A plurality of single-phase pins 442 are arranged circumferentially on the outer edge of the single-phase connecting plate 441. The single-phase pins 442 extend axially. The single-phase connecting plate 441 is also provided with a positive electrode avoidance groove 443 and a negative electrode avoidance groove 444 on the outer edge. Two single-phase pins 442, a positive electrode avoidance groove 443, and a negative electrode avoidance groove 444 are arranged in sequence circumferentially. The single-phase connecting plate 441 is provided with a single-phase connection end 445 at the inner edge. The single-phase connection end 445 is provided with a connection hole. The single-phase connecting plate 441 is provided with two avoidance grooves 447 and three positioning holes 446. The two avoidance grooves 447 are located at the inner edge of the single-phase connecting plate 441. The three positioning holes 446 are distributed circumferentially outside the avoidance grooves 447. The three single-phase connecting plates 441 are arranged in a coplanar and tiled manner, thus forming a quasi-circular contour at the outer edge and a wiring space inside.

[0072] When assembling the laminated busbar assembly 4, multiple capacitors 45 and the mounting housing 31, the positive connection plate 41 is installed into the mounting housing 31, then multiple capacitors 45 are installed onto the positive connection plate 41. Subsequently, the negative connection plate 42 is arranged on the positive connection plate 41, and the device accommodation cavity and the capacitors 45 are covered. At the same time, the negative connection plate 42 is supported by the bearing step 3112, and the bump 3113 is in limit fit with the limit groove 4122, and the capacitors 45 are connected between the positive connection plate 41 and the negative connection plate 42. Then, three single-phase connection plates 441 are arranged on the negative connection plate 42. Subsequently, the first positioning post 314 sequentially passes through the first positioning hole 416, the first positioning hole 424 and the avoidance groove 447, and the second positioning post 315 sequentially passes through the second positioning hole 417, the second positioning hole 423 and the positioning hole 446, referring to Figure 18 and Figure 19 . Finally, the main circuit board 43 is installed on the three single-phase connection plates 441. The main circuit board 43 is provided with connection holes at the corresponding positions of the first positioning post 314 and the second positioning post 315. Then, the laminated connection is completed through screws, that is, the main circuit board 43, the three-phase connection plate assembly 44, the negative connection plate 42, the capacitors 45 and the positive connection plate 41 are sequentially laminated and connected. And three insulating layers 45 are arranged between the three-phase connection plate assembly 44 and the negative connection plate 42. The shapes of the three insulating layers 45 are equipped with the single-phase connection plates. Insulating layers can also be arranged between the negative connection plate 42 and the positive connection plate 41, and between the main circuit board 43 and the three-phase connection plate assembly 44. And the positive pin 411 passes through the first pin avoidance groove 422 and the positive avoidance groove 443 and is connected to the pad of the main circuit board 43. The negative pin 421 passes through the negative avoidance groove 444 and is connected to the pad of the main circuit board 43. The single-phase pin 442 passes through and is connected to the pad of the main circuit board 43. Multiple positive pins 411, multiple negative pins 421 and multiple single-phase pins 442 are arranged along the same circumferential direction. Of course, the positive avoidance groove 443 and the negative avoidance groove 444 can also be arranged as an integrally connected pin avoidance groove. Subsequently, the positive pin passes through the first pin avoidance groove and the second pin avoidance groove, and the negative pin passes through the second pin avoidance groove. Of course, the laminated distribution positions of the three-phase connection plate assembly, the negative connection plate and the positive connection plate can be adjusted. For example, the connection plate arranged in a pot shape can also be the negative connection plate, and the positive connection plate is above the pot-shaped negative connection plate, that is, the polarities of the positive connection plate 41 and the negative connection plate 42 in the above solution are swapped.

[0073] Furthermore, the first avoidance hole 410, the second avoidance hole 426, and the third avoidance hole 3121 are arranged in an overlapping and communicating manner. The connection fixing platform 317, the three positive connection ends 419, the three negative connection ends 427, and the three single-phase connection ends 445 are all located in the axial projection of the second avoidance hole 426 or the third avoidance hole 3121. The positive connection end 419 is located on the positive connection position 319 and can be connected by screws. The negative connection end 427 is located on the negative connection position 318 and can be connected by screws. The positive connection end 419, the negative connection end 427, and the single-phase connection end 445 are sequentially distributed along the circumferential direction. The bent positive connection end 419 also has a limiting fit with the inner edge of the second avoidance hole 426 and the connection fixing platform 317. The bent negative connection position 318 has a limiting fit with the connection fixing platform 317. The fixing hole 3171 located on one side of the negative connection position 318 is fixedly connected to the main circuit board. The motor control device further includes three Hall elements 46. One Hall element 46 is arranged at one single-phase connection end 445, and the pins of the Hall element 46 are also electrically connected to the main circuit board.

[0074] Referring to Figure 18 and Figure 19 , and in combination with Figure 17 and Figure 20 , after the motor control device 3 in the above state is installed in the control installation cavity 122, the third avoidance hole 3121 is sleeved outside the middle ring portion 211 and the magnetic ring 28. And the position of the second wiring terminal 223 is opposite to the position of the single-phase connection end 445, and then they can be connected by screws, and the second wiring terminal 223 passes through the Hall element 46. The installation housing 31 is installed in the annular wall 124 and has a limiting fit with it. A temperature sensor and other monitoring sensors can be arranged in the motor installation cavity, and the wiring of the sensor passes through the wire passing hole 114 and then can be electrically connected to the motor control device. The power tube 34 is located on the outer periphery of the main circuit board 43 and on the outer periphery of the installation housing 31. In addition, the control cooling groove 132 is located on the outer periphery of the power tube 34 and can conduct heat quickly.

[0075] The main circuit board 43 is provided with a connection position 431, a control circuit position 432, a first welding position 433 and a second welding position 434. The control circuit position 432, the first welding position 433 and the second welding position 434 are arranged in a circular layout. The connection position 431 is located in the middle of the main circuit board 43. The control circuit position 432 is located on the outer periphery of the connection position 431. The first welding position 433 is located on the outer periphery of the control circuit position 432. The second welding position 434 is located on the outer periphery of the first welding position 433. The second welding position 434 is located on the outermost periphery of the main circuit board 43. The positive connection end 419, the negative connection end 427 and the single-phase connection end 445 are all located in the axial projection of the connection position 431. The main circuit board 43 is provided with avoidance holes at positions corresponding to the positive connection end 419, the negative connection end 427 and the single-phase connection end 445, so that the positive connection end 419, the negative connection end 427 and the single-phase connection end 445 can pass through the corresponding avoidance holes, and the single-phase connection end 445 needs to be electrically connected to the main circuit board 43. A plurality of positive pins 411, a plurality of negative pins 421 and a plurality of single-phase pins 442 are electrically connected to the main circuit board 43 at the first welding position 433. A plurality of power tubes 34 are arranged on the outer periphery of the main circuit board 43 and are electrically connected to the main circuit board 43 at the second welding position 434. The plurality of power tubes 34 are evenly distributed along the same circumferential direction of the main circuit board 43. The plurality of power tubes 34 are arranged along the circumferential direction and are all located radially outside the three-phase connection board assembly 44, the negative connection board 42 and the positive connection board 41.

[0076] A plurality of positive pins 411, a plurality of negative pins 421 and a plurality of single-phase pins 442 are arranged along the same circumferential direction of the main circuit board 43, and two adjacent single-phase pins 442 form a single-phase bridge arm pin group. A single-phase bridge arm pin group, a positive pin 411 and a negative pin 421 are sequentially arranged in a circumferential cycle. A control circuit is provided at the control circuit position 432. The circuit is formed by copper plating at the control circuit, and the corresponding inverter circuit and required circuit components are welded in cooperation. The capacitor 45 is located in the axial projection of the control circuit position 432.

[0077] Refer to Figure 9, a wiring hole 138 is provided through the circumferential wall of the housing 1 at the control installation cavity 122 in the radial direction. The drive assembly further includes a wiring component 5, and the wiring component 5 includes a wiring sleeve 53, a positive wiring board 52, and a negative wiring board 51. The positive wiring board 52 and the negative wiring board 51 are arranged in a sheet shape. The inner wiring end of the positive wiring board 52 includes a positive inner connection base 523 and three positive wiring portions 524. The three positive wiring portions 524 are connected to the outer circumference of the positive inner connection base 523. The three positive wiring portions 524 are evenly distributed along the circumferential direction on the outer circumference of the positive inner connection base 523, and connection holes are provided on the positive wiring portions 524. The inner wiring end of the negative wiring board 51 includes a negative inner connection base 513 and three negative wiring portions 514. The three negative wiring portions 514 are connected to the outer circumference of the negative inner connection base 513. The three negative wiring portions 514 are evenly distributed along the circumferential direction on the outer circumference of the negative inner connection base 513, and connection holes are provided on the negative wiring portions 514. The positive wiring board 52 and the negative wiring board 51 respectively have outer wiring ends on the outer circumferential wall of the housing 1. A straight plate portion 521 is provided between the outer wiring end 522 of the positive wiring board 52 and the positive wiring portion 524. A straight plate portion 511 is provided between the outer wiring end 512 of the negative wiring board 51 and the negative wiring portion 514. The straight plate portion 511 and the straight plate portion 522 pass through the wiring hole 138 side by side.

[0078] In addition, the positive inner connection base 523 and the negative inner connection base 513 are arranged overlapping each other along the axial direction of the housing 1 on the main circuit board 43. The negative inner connection base 513 is located between the positive inner connection base 523 and the motor control device. A first avoidance recess 525 is formed between the positive inner connection base 523 and the positive wiring portion 524. The negative inner connection base 513 is located in the first avoidance recess 525. The three positive connection ends 419 and the three negative connection ends 427 are all located in the same radial plane. Then, it is convenient to connect one positive wiring portion 524 with one positive connection end 419 and one negative wiring portion 514 with one negative connection end 427. In order to improve the protection performance, the wiring sleeve 53 is covered outside the positive wiring board 52 and the negative wiring board 51 by secondary injection molding. Except for the outer wiring ends, the negative wiring portions, and the positive wiring portions, they are all wrapped. And the wiring sleeve 53 is located in the control installation cavity 122, and the wiring sleeve 53 is in interference fit with the wiring hole 138.

[0079] Of course, it can also be set as follows. The positive inner connection base 523 is located between the negative inner connection base 513 and the motor control device. A second avoidance recess is formed between the negative inner connection base 513 and the negative wiring portion 514. The positive inner connection base 523 is located in the second avoidance recess, and it can also achieve the purpose of the present invention.

[0080] The wiring assembly 5 further includes a junction box 55. The junction box 55 is connected to the outer peripheral wall of the housing 1 at the control installation cavity 122. The interior of the junction box 55 communicates with the control installation cavity 122 through a wiring hole 138. The external wiring ends of the positive wiring board 52 and the negative wiring board 51 extend into the interior of the junction box 55. The drive assembly has an installation orientation. For example, Figure 18 When installed on a vehicle in a grounded state, the housing 1 has a housing top and a housing bottom in the vertical direction of the installation orientation. In the vertical direction of the installation orientation, the wiring hole 138 is located between the housing top and the housing bottom. Consequently, the junction box 55 is also located between the housing top and the housing bottom and is located on the lateral side portion. This can effectively reduce the occupied space in the vertical direction. Preferably, the straight plate portion 511 and the straight plate portion 522 extend at an acute angle or a right angle of 45 degrees with respect to the vertical direction.

[0081] Compared with the motors in the prior art, since the rear end of the shaft of existing motors generally has a fixed structure or a heat dissipation structure, which generally presents in the form of multiple cylindrical structures, the space at the rear end of the shaft in this case is utilized. Devices such as the motor control device, capacitors, and power tubes are arranged in the control installation cavity at the rear end of the shaft, and a stacked busbar circuit arrangement, a wiring base, and a ring-shaped power tube are used for layout to optimize the connection structure at the rear end of the shaft. This not only reduces the overall occupied space of the circuit devices but also effectively utilizes the space at the rear end of the shaft, such that the axial dimension of the drive assembly in this case is the same as that of the existing motor assembly. By using the optimized wire outlet method, the radial dimension in the vertical direction is also the same, realizing the highly integrated drive assembly of the present invention.

[0082] Vehicle embodiments:

[0083] The vehicle includes a drive assembly as described in the above solution. The drive assembly can be integrated with a transmission or not. The vehicle can be a new energy electric car, a new energy electric bus, a new energy electric truck, a new energy electric cleaning vehicle, a new energy electric rail transit vehicle, a new energy electric flying vehicle, a new energy electric shipping vehicle, etc.

[0084] As can be seen from the above, by utilizing the space at the rear end of the motor shaft, the spacing arrangement of the partition wall and the layout of the bearings, the rotor is rotatably arranged in the motor mounting cavity, while the motor control device is arranged in the control mounting cavity. By arranging three single-phase terminals to pass through the partition wall, they are connected between the motor control device and the stator, and all three single-phase terminals are located between the axial projections of the bearings and the stator. Not only is there an operating space between the bearings and the stator when connecting the wiring terminals of the stator and the single-phase terminals, that is, when the rotor is not installed, facilitating the connection between the wiring terminals of the stator and the single-phase terminals, but also the motor control device is arranged at the rear end of the motor shaft, effectively reducing the occupied space, improving the space utilization rate, and achieving a high degree of integration of the drive assembly. By stably installing the bearings through the mounting ring wall, the operating stability of the motor is improved. At the same time, all three single-phase terminals are located on the outer periphery of the mounting ring wall, which also facilitates the installation and positioning of the wiring terminals of the stator. The first avoidance groove can provide positioning for the wiring terminals of the stator and optimize the layout space, thereby improving the convenience and reliability of wiring. The fixing holes are used to connect and fix the motor control device. Since both the wiring holes and the fixing holes are located between the bearings and the stator, disassembly and assembly operations can be conveniently carried out. The second avoidance groove can be used to place the wires and wiring terminals of the stator, thus optimizing the layout space.

[0085] In addition, since the stator has three-phase windings, by arranging three single-phase terminals on the outer periphery of the wiring seat body, the three single-phase terminals can correspondingly connect to the wiring terminals of the stator, thereby optimizing the wiring layout. Moreover, the space between the three single-phase terminals can be used to place components such as bearings, thus improving the compactness of the structural layout. By having the first wiring terminal and the second wiring terminal located on the outer and inner sides of the wiring groove respectively, the first wiring terminal is arranged in a dispersed pattern circumferentially to avoid the bearings, while the second wiring terminal is arranged in a compact pattern circumferentially to centralize the connection to the motor control device, improving the circuit layout utilization rate of the motor controller. By utilizing the settings of the middle ring part, the external connection part, and the internal connection part and the production by secondary injection molding, the middle ring part, the external connection part, and the internal connection part wrap around the single-phase terminals, thereby improving the protection between the two wiring terminals. The middle ring part can be used to realize the installation and positioning of other components, and the external connection part and the first wiring terminal extend outwardly on the axial outer side and the radial outer side of the middle ring part, so as to provide space for avoiding the bearings or the resolver, thus improving the space utilization rate. The retaining wall can provide certain positioning and limiting for the wiring, improving the connection stability and also playing a role in insulating the wiring terminals of the stator. The three-phase wiring seat can be installed and fixed in the drive assembly through the installation part, and by arranging the installation part on one side of the second wiring terminal, the disassembly and assembly operations are convenient. Since the wiring seat body can install components such as resolvers, a magnetic ring is arranged on the outer periphery of the wiring seat body to reduce electromagnetic interference.

[0086] In addition, potting adhesive is filled on the end face of the partition wall facing the motor installation cavity, and then the potting adhesive covers the outside of the first wiring part, where the first wiring part is used to connect to the wiring terminal of the stator, so as to realize the potting and sealing of the first wiring part and the wiring terminal of the stator, effectively improving the protection performance and efficiently conducting waste heat to the partition wall. By stably installing the bearing through the mounting ring wall, the running stability of the motor is improved. At the same time, the three single-phase terminal posts are all located on the outer periphery of the mounting ring wall, which is convenient for the mounting and positioning of the wiring terminal of the stator, and also enables the potting adhesive to be accurately filled between the mounting ring wall, the partition wall and the inner wall of the housing, so that the waste heat generated by the bearing can also be conducted through the potting adhesive. The fixing holes are used to connect and fix the motor control device, and the wiring holes are used for the single-phase terminal posts to pass through, so as to improve the isolation degree between the motor installation cavity and the control installation cavity and avoid mutual interference. The second avoidance groove can be used to place the wires and wiring terminals of the stator, so as to optimize the layout space and use the potting adhesive to position the wiring terminals, wires and ends of the windings of the stator.

[0087] Furthermore, the resolver is connected to the rotor and can monitor the rotation state of the rotor. Since the resolver is located on the side close to the control installation cavity, it can be conveniently wired to connect to the motor control device. The chamber cover can isolate the two cavities and facilitate wiring by using the interface groove, thus improving the running stability.

[0088] In addition, the liquid cooling channel of the housing is connected to the interval cooling groove of the partition wall, so the waste heat of the bearing and some other components can be quickly transferred from the partition wall to the housing, thereby improving the heat conduction efficiency and improving the operating performance of the drive assembly. Since the partition wall needs to provide support for the bearing and other components, the partition wall needs a certain structural cavity, so the interval cooling groove is distributed circumferentially in a separate manner to improve the heat conduction efficiency of the partition wall without affecting the strength. The setting of the guide baffle is used to guide the coolant located on the outside from the outer end to the inner end, and the installation and positioning are conveniently performed through the installation groove, and the flow direction of the coolant is adjusted by the guide groove at the outer end and the through hole in the middle, so that the heat exchange is more sufficient and the heat conduction performance is improved. The outer end of the interval cooling groove is open to a larger extent and the inner end is smaller, so the size of the flow channel is expanded while ensuring the structural strength of the inner end of the partition wall, thereby improving the heat dissipation performance. The relative sealing of the interval cooling groove and the liquid cooling channel is achieved by covering the shell cover, and then the groove body and the channel are conveniently processed, thereby improving the processing efficiency and the heat dissipation efficiency of the channel. The motor cooling slot mainly dissipates the waste heat generated by the motor, while the control cooling slot mainly dissipates the waste heat generated by the motor control device, and the interval cooling slot is connected between the motor cooling slot and the control cooling slot. Therefore, the liquid cooling solution using an integrated heat dissipation channel improves the heat dissipation efficiency and the performance of the drive assembly. Since the partition wall needs to provide support for the bearings and other components, the partition wall requires a certain structural cavity. Therefore, the interval cooling slot is distributed circumferentially in a separated manner to improve the thermal conductivity of the partition wall without affecting the strength. The diversion baffle is set to divert the coolant located on the outside from the outer end to the inner end, so that the heat exchange is more sufficient and the thermal conductivity is improved.

[0089] In addition, multiple power tubes are arranged circumferentially and connected to the inner wall of the system installation cavity, and cooperate with the interconnected motor cooling groove and control cooling groove, so that the waste heat of the circumferentially distributed power tubes can be efficiently conducted to the control cooling groove and the motor cooling groove, and then the integrated liquid cooling heat dissipation is realized, and the heat dissipation efficiency is improved. At the same time, the inner wall is used as a heat conductor to effectively optimize the device layout of the motor controller, so that the motor controller does not need to increase the setting of the heat conduction structure, which is convenient for the design of highly integrated devices. Since the power tube is turned on in time during actual operation, the dispersed arrangement can conduct heat in time at different positions, thereby further improving the heat conduction efficiency. Through the close proximity of the heat conduction plane and the package of the power tube, the heat conduction area can be increased to increase the heat conduction efficiency, and the avoidance groove is not only convenient for the processing of the heat conduction plane, but also can form a certain avoidance space between the power tubes. The heat conducting sheet can be made of heat conducting silica gel or heat conducting ceramic plate, and the heat conducting sheet is used to increase the heat conduction efficiency between the package of the power tube and the heat conducting plane. The power installation groove can achieve certain positioning and limiting of the power tube. By setting a positioning frame in the power installation slot and using the positioning frame to limit the power tube, especially since the drive assembly needs to overcome a harsh vibration operating environment, the installation stability of the power tube is effectively improved, thereby improving the performance stability of the drive assembly.

[0090] Furthermore, three single-phase connection plates are arranged in a coplanar and tiled manner to form a quasi-circle. After the laminated arrangement, each circuit board is stacked, and then each pin on the outer edge is respectively connected to the main circuit board, thereby realizing the corresponding circuit connection. Not only is the laminated structure compact, reducing the axial dimension, but also the laminated assembly is simple and efficient, improving the assembly efficiency. The arrangement of pins in the same circumferential direction is beneficial to optimizing the wiring layout and circuit layout of the main circuit board. Through the setting of the avoidance groove, not only can the pins be better arranged in the same circumferential direction, but also the avoidance groove can be used for corresponding limiting. An avoidance hole is arranged in the middle part, and a connection space is formed in the middle through the bow-shaped single-phase connection plate. Then, the positive connection end, the negative connection end, and the three single-phase connection ends are all located in the axial projection of the second avoidance hole, so that the positive connection end, the negative connection end, and the middle parts of the single-phase connection ends are concentrated for convenient connection operation, and the pins are arranged circumferentially on the outer periphery, which can effectively optimize the circuit wiring layout.

[0091] In addition, the positive connection plate is arranged in a cylindrical shape with a bottom, and a plurality of capacitors are arranged therein to achieve effective positioning. Then, with the covering and positioning of the negative connection plate, good support is provided for the stable connection of the capacitors. Moreover, the main circuit board, the negative connection plate, the plurality of capacitors, and the positive connection plate are arranged in a laminated manner in sequence. Not only is the laminated structure compact, reducing the axial dimension, but also the laminated assembly is simple and efficient, improving the assembly efficiency. The first avoidance hole is used for installation positioning and the placement of the wiring terminal. Then, a plurality of capacitors are placed through the annular device accommodating cavity, so that the plurality of capacitors are circumferentially distributed, and good support and positioning are provided for the capacitors. The two ends of the capacitor are electrically connected through the axially arranged electrical contacts, which can provide good electrical connection stability for the capacitor. The negative connection plate is stably arranged on the receiving platform, and by using the fact that the positive connection end and the negative connection end are both located in the second avoidance hole, the wiring terminals are concentratedly arranged, optimizing the layout and improving the connection operation efficiency. The main circuit board, the positive connection plate, the negative connection plate, and even the motor control device are stably supported and fixed through the installation housing and the positioning post assembly. The third avoidance hole of the installation housing can be used for assembly and positioning on other devices, and the connection fixing platform is used to provide stable connection support for the positive connection and the negative connection. The positioning posts can not only provide support and positioning for the main circuit board, the positive connection plate, and the negative connection plate, but also form a space for positioning the capacitors between the four positioning posts, thereby providing stable support for the connection of the capacitors and ensuring the stability of the motor control device. Since the capacitors are circumferentially distributed, the arrangement direction of the capacitors can be fitted and positioned under the radial arrangement of the first positioning post and the second positioning post, further positioning the capacitors and improving their stability.

[0092] Moreover, when pressing a plurality of power tubes arranged in a ring through an annular base portion and circumferentially distributed pressing portions, the pressing member can be loaded into a preset position to press a plurality of power tubes simultaneously, thereby achieving simple assembly and rapid positioning. The pressing member in the form of a sheet member is easier to manufacture and form, and the sheet assembly and installation positioning are also easier. The outwardly extending and arc-shaped abutting portion can provide a stable pressing force to the power tube. Two adjacent pressing portions form a device pressing group for pressing one power tube. The first groove body enables the two pressing portions to maintain the same pressing force, while the second groove body spaces the device pressing groups. This not only gives the device pressing groups a larger offset space, but also, in combination with the setting of the annular base portion, enables the device pressing groups to better press the power tubes.

[0093] Furthermore, by arranging the connection position, control circuit position, first welding position, and second welding position in sequence from the middle to the outside, the control circuit position, first welding position, and second welding position are respectively arranged in a ring shape. Each pin at the outer edge is connected to the main circuit board, thereby achieving the corresponding circuit connection. The connection ends in the middle are concentratedly arranged, and the control circuit position in the middle has a relatively large arrangement space. Using the annular circuit layout can improve the structural cooperation degree between the circuit layout and the drive assembly.

[0094] In addition, the positive electrode wiring board and the negative electrode wiring board lead out wires through the peripheral wall in the radial direction, making full use of the space in the horizontal direction, thereby reducing the space occupied in the vertical direction or the axial direction. The sheet-shaped wiring board is convenient for positioning and installation, and further facilitates the layout of the axial space. The arrangement of three positive electrode connection ends and three negative electrode connection ends is beneficial to the layout of the annular circuit of the motor control device. Therefore, the wiring board is also correspondingly provided with three wiring portions in the circumferential direction. Through the load connection of the inner connection base portion and using triangular positioning for fixation, a stable support and fixation are provided for the wiring board. Using the laminated arrangement can improve the compactness of the structural arrangement. In order to solve the interference problem generated after the laminated arrangement, by setting the avoidance recesses, a reasonable structural arrangement enables the positive electrode wiring board and the negative electrode wiring board to be laminated and arranged without interfering with each other. Through the insulation arrangement of the wiring sleeve, the protection performance of the wiring board is improved, the safety is enhanced, and by setting a junction box on the outer peripheral wall in the radial direction, the positive and negative electrodes of the battery can be conveniently connected without the need to open the motor installation cavity for connection. For the arrangement of the wire outlet directions of the positive electrode wiring board and the negative electrode wiring board, it is based on the installation orientation of the drive assembly. In order to shorten the dimension in the vertical direction and enable the vehicle to have more space in the vertical direction at the drive assembly, the wiring holes are located between the top and the bottom of the housing, and the positive electrode wiring board and the negative electrode wiring board lead out wires obliquely to the vertical direction.

Claims

1. Three-phase connection socket, characterized in that, Comprising: A wiring base body, which extends in a cylindrical shape. Three single-phase wiring terminals, the three single-phase wiring terminals are arranged along the axial direction of the wiring base body, the three single-phase wiring terminals are arranged on the outer periphery of the wiring base body, and a first wiring end and a second wiring end are respectively arranged at both axial ends of the wiring base body for the single-phase wiring terminal. A wiring groove is arranged in the wiring base body. In the axial projection of the wiring base body, the first wiring end is located outside the periphery of the wiring groove, and the second wiring end is located inside the wiring groove. The wiring base body includes a middle ring portion, an outer connection portion and an inner connection portion. The middle ring portion is arranged in a ring shape and encloses the wiring groove. The inner connection portion extends from the middle ring portion into the wiring groove, and the outer connection portion extends from the middle ring portion outside the wiring groove. The single-phase wiring terminal passes through the middle ring portion, the first wiring end is located at the outer connection portion, and the second wiring end is located at the inner connection portion.

2. The three-phase wiring base according to claim 1, wherein: Both the outer connection portion and the first wiring end are located on the axial outer side of the middle ring portion.

3. The three-phase wiring base according to claim 1, wherein: The three single-phase wiring terminals are connected to the middle ring portion, the outer connection portion and the inner connection portion by a two-shot injection molding process.

4. The three-phase wiring base according to claim 1, wherein: A retaining wall is arranged on the outer periphery of the first wiring end of the outer connection portion.

5. The three-phase wiring base according to claim 1, wherein: An installation portion is further arranged in the wiring groove, and the installation portion is located on one side of the second wiring end.

6. The three-phase wiring base according to any one of claims 1 to 5, wherein: A magnetic ring is further arranged on the outer periphery of the wiring base body.

7. Drive assembly, characterized in that, The drive assembly includes the three-phase wiring base according to any one of claims 1 to 6 above.

8. A vehicle, characterized in that, The vehicle includes the drive assembly according to claim 7 above.

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