Stator assembly and motor

Abstract

The stator assembly comprises a stator iron core and is provided with a wedge-shaped liquid channel, the wedge-shaped liquid channel is provided with a first end and a second end, the first end penetrates through the end face of the stator iron core to form an opening, and the size of the wedge-shaped liquid channel is gradually increased in the direction from the first end to the second end; the oil injection seat comprises a seat body, a lock sleeve and a lock finger, the lock sleeve and the lock finger are both connected with the seat body and inserted into the wedge-shaped liquid channel, the seat body is provided with a liquid injection flow channel, the lock sleeve is provided with an oil inlet hole, and the oil inlet hole is communicated with the liquid injection flow channel and the wedge-shaped liquid channel; the lock pin comprises a wedge-shaped structure, the wedge-shaped structure is inserted between the lock sleeve and the lock finger, the size of the wedge-shaped structure is gradually increased in the direction from the first end to the second end, the wedge-shaped structure drives the lock finger to be opened in the preset direction, and the maximum size of the portion, inserted into the wedge-shaped liquid channel, of the oil injection base in the preset direction is larger than the opening size of the first end. According to the invention, the lock pin and the wedge-shaped liquid channel are utilized, so that the sealing performance is optimized while the oil injection seat and the stator iron core are fixed.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator assembly and a motor. Background Art

[0002] With the continuous development of new energy vehicles and the increasing market demand for their driving capabilities, the motors in these vehicles must continuously increase their speed, torque density, and power density while gradually reducing their size. The higher the speed, torque density, and power density of a motor, the more heat it generates. Therefore, a heat dissipation and cooling structure is essential for reliable, stable, and efficient operation of the motor.

[0003] In related art, motor stator assemblies typically utilize oil cooling for heat dissipation. The stator core of the stator assembly is provided with cooling channels through which oil flows to dissipate heat from the stator core. Oil rings are provided at the ends of the stator core, which spray oil toward the ends of the stator core to dissipate heat from the ends of the stator core and the stator windings. However, the oil ring and stator core are typically connected by fasteners that penetrate the oil ring, or the oil ring is clipped onto the outer circumference of the stator core. The connection between the oil ring and the stator core is directly exposed to the outside of the stator assembly, which can affect the sealing effect, lead to oil leakage, and thus affect the heat dissipation efficiency. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a stator assembly to solve the problem in the prior art that the connection between the stator core and the oil ring is exposed on the outside of the stator assembly, resulting in poor sealing effect, oil leakage and poor heat dissipation efficiency; the second purpose is to provide a motor.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A stator assembly, comprising: a stator core, provided with a wedge-shaped liquid channel extending along the axial direction of the stator core, the wedge-shaped liquid channel having a first end and a second end arranged opposite to each other, the first end penetrating through one end surface of the stator core to form an opening, and the size of the wedge-shaped liquid channel gradually increasing in a preset direction from the first end to the second end, the preset direction being perpendicular to the axial direction of the stator core; an oil injection seat, comprising a seat body, a locking sleeve and a locking finger, the locking sleeve and the locking finger being connected to the seat body and inserted into the wedge-shaped liquid channel, the locking sleeve and the locking finger being arranged along the preset direction, and the locking finger being arranged along the preset direction. The preset direction is deformable, the seat body is provided with a liquid spray channel, the locking sleeve is provided with an oil inlet hole, the oil inlet hole is connected with the wedge-shaped liquid channel and the liquid spray channel; the locking pin includes a wedge-shaped structure, the wedge-shaped structure is inserted between the locking sleeve and the locking finger, and the size of the wedge structure in the preset direction gradually increases along the direction from the first end to the second end, the locking pin abuts against the end wall of the second end, and the wedge structure drives the locking finger to open along the preset direction, so that in the preset direction, the maximum size of the part of the oil spray seat inserted into the wedge-shaped liquid channel is larger than the opening size of the first end.

[0007] According to the above technical means, the wedge structure is first inserted between the lock sleeve and the lock finger, and then the lock pin, lock sleeve and lock finger are inserted into the wedge-shaped liquid channel together. Finally, the lock pin abuts the end wall of the second end, and the injection seat is continuously pressed. The depth of the wedge structure inserted into the lock sleeve and the lock finger gradually increases. Since the size of the wedge structure in the preset direction gradually increases from the first end to the second end, as the depth of the wedge structure inserted into the lock sleeve and the lock finger increases, the lock finger is pushed by the wedge structure in the direction away from the lock finger and continuously deformed, causing the maximum size of the portion of the injection seat inserted into the wedge-shaped liquid channel to continue to increase, until the maximum size of the portion of the injection seat inserted into the wedge-shaped liquid channel is greater than the size of the first end. At this time, the injection seat cannot be pulled out of the wedge-shaped liquid channel, thereby achieving fixation between the injection seat, the lock pin and the stator core. It can be seen from this that in the present invention, the connection structure between the injection seat and the stator core is inserted into the stator core, and the connection between the injection seat and the stator core will not be exposed to the outside of the stator assembly, which can effectively reduce the probability of coolant leakage and improve heat dissipation efficiency.

[0008] Furthermore, the side wall of the oil inlet hole is provided with an auxiliary mounting port and a positioning port, and the auxiliary mounting port is closer to the bottom wall of the wedge-shaped liquid channel than the positioning port; the locking pin also includes a positioning column and a positioning block, the positioning column is connected to the wedge-shaped structure and is at least partially inserted into the oil inlet hole, and the positioning block is provided at the part of the positioning column inserted into the oil inlet hole, and along the direction from the first end to the second end, the size of the positioning block along the preset direction gradually increases, and the positioning block is first clamped in the auxiliary mounting port and finally clamped in the positioning port.

[0009] According to the above technical means, when the wedge-shaped liquid channel is not inserted, the auxiliary installation port and the positioning block are used to cooperate to realize the positioning of the fuel injection seat and the pin shaft. After the wedge-shaped liquid channel is inserted, the positioning port and the positioning block are used to ensure that they are plugged in place and fix the position of the fuel injection seat and the pin shaft.

[0010] Furthermore, the positioning column includes: a base, connected to the wedge-shaped structure, an oil groove is provided on the side of the base facing the second end, the oil groove is communicated with the wedge-shaped liquid channel, the base is provided with an oil hole, and the oil hole is communicated with the oil groove; a column body, provided on the side of the base facing the oil injection seat and inserted into the oil inlet hole, the positioning block is provided on the column body, and the column body is provided with an oil passage, and the oil passage is communicated with the oil hole and the oil inlet hole.

[0011] According to the above technical means, the communication between the cooling liquid channel, the wedge-shaped liquid channel and the oil inlet hole is ensured, thereby ensuring the oil injection efficiency of the oil injection seat and the cooling efficiency of the end face of the stator core.

[0012] Furthermore, the column body includes: a first column and a second column, the first column and the second column are both connected to the base and are arranged on opposite sides of the oil hole, the oil passage is located between the first column and the second column, and the positioning block is arranged on the first column and / or the second column; a connector, connected between the first column and the second column, and spaced apart from the base.

[0013] According to the above technical means, the structure of the column body is simple and stable, which is conducive to increasing the oil flow rate of the oil passage.

[0014] Furthermore, the locking finger is provided with a first inclined surface on the side facing the locking sleeve, and the wedge-shaped structure is provided with a second inclined surface, the first inclined surface and the second inclined surface can be slidably fitted together, and the first inclined surface and the second inclined surface are both arranged at an axial inclination relative to the stator core; and / or, the end of the locking finger connected to the seat body is provided with a thinning groove, and the thinning groove is provided on at least one of the two opposite sides of the locking finger in the preset direction; and / or, the wedge-shaped structure presses the locking finger against the side wall of the wedge-shaped liquid channel; and / or, the locking finger is provided with a locking groove on the side facing away from the locking sleeve, and the side wall of the wedge-shaped liquid channel is provided with a step, and the step is clamped in the locking groove.

[0015] The above-described technical approach facilitates the insertion of the locking finger and locking sleeve into the wedge-shaped fluid channel and subsequently secures the relative position between the fuel injector and the stator core. The thinning groove reduces the risk of deformation of the locking finger. The locking finger presses against the sidewall of the wedge-shaped fluid channel, enhancing sealing effectiveness and positional stability. The combination of the step and locking groove improves the relative positional reliability between the stator core and the fuel injector.

[0016] Furthermore, the oil spray seat also includes an oil inlet structure, which is arranged on the side of the seat body facing away from the stator core, and the oil inlet structure is provided with an oil inlet, and the spray flow channel is connected to the oil inlet; wherein, the oil inlet is arranged at an end of the oil inlet structure away from the seat body, or in the radial direction of the stator core, the oil inlet is arranged on the outer side surface of the oil inlet structure, and the outer side surface of the oil inlet structure and the outer side surface of the oil spray seat are located on the same curved surface.

[0017] According to the above technical means, coolant can be added to the wedge-shaped liquid channel through the oil inlet structure.

[0018] Furthermore, the oil injection seat further comprises: a sealing ring, which is provided on a side of the seat body facing the stator core and surrounds the locking sleeve and the locking finger, and the sealing ring abuts against an end face of the stator core.

[0019] According to the above technical means, the top end of the sealing ring is easily deformed to seal the end face of the oil injection seat and the stator core, thereby increasing the sealing effect between the oil injection seat and the stator core.

[0020] Furthermore, there are multiple oil spray seats, which are arranged along the axial direction of the stator core. The ends of the seat bodies are provided with protrusions or grooves, and the ends of two adjacent seat bodies are plug-fitted through the protrusions and the grooves.

[0021] According to the above technical means, each fuel injection seat is small in size, easy to produce, process and install, and can save costs.

[0022] Furthermore, the wedge-shaped liquid channels are all arranged between the inner circumference and the outer circumference of the stator core; and / or, the stator core includes a plurality of end laminations, which are stacked along the axial direction of the stator core, each of the end laminations is provided with an end oil hole, and the plurality of end oil holes are connected to form the wedge-shaped liquid channels, and the plurality of end oil holes are aligned at the center of the circumference of the stator core, and the sizes of the end oil holes of the plurality of end laminations in the circumference of the stator core gradually increase from the first end to the second end.

[0023] According to the above technical means, it is possible to avoid providing a liquid channel on the outer peripheral surface of the stator core, and the wedge-shaped liquid channel is easy to process.

[0024] A motor comprises the above-mentioned stator assembly.

[0025] Beneficial effects of the present invention:

[0026] (1) According to the above technical means, the wedge structure is first inserted between the lock sleeve and the lock finger, and then the lock pin, lock sleeve and lock finger are inserted into the wedge-shaped liquid channel together. Finally, the lock pin abuts against the end wall of the second end, and the injection seat is continuously pressed. The depth of the wedge structure inserted into the lock sleeve and the lock finger gradually increases. Since the size of the wedge structure in the preset direction gradually increases from the first end to the second end, as the depth of the wedge structure inserted into the lock sleeve and the lock finger increases, the lock finger is pushed by the wedge structure to continuously deform in the direction away from the lock finger, resulting in the maximum size of the portion of the injection seat inserted into the wedge-shaped liquid channel continuously increasing, until the maximum size of the portion of the injection seat inserted into the wedge-shaped liquid channel is larger than the size of the first end. At this time, the injection seat cannot be pulled out of the wedge-shaped liquid channel, and the fixation between the injection seat, the lock pin and the stator core is achieved. It can be seen from this that in the present invention, the connection structure between the oil spray seat and the stator core is inserted into the stator core, and the connection between the oil spray seat and the stator core will not be exposed to the outside of the stator assembly, which can effectively reduce the probability of coolant leakage and improve heat dissipation efficiency.

[0027] (2) According to the above technical means, when the wedge-shaped liquid channel is not inserted, the auxiliary installation port and the positioning block are used to cooperate to achieve the positioning of the injection seat and the pin shaft. After the wedge-shaped liquid channel is inserted, the positioning port and the positioning block are used to cooperate to ensure that they are plugged in place and fix the positions of the injection seat and the pin shaft.

[0028] (3) According to the above technical means, the connectivity among the cooling liquid channel, the wedge-shaped liquid channel and the oil inlet hole is ensured, thereby ensuring the oil injection efficiency of the oil injection seat, thereby ensuring the cooling efficiency of the end face of the stator core.

[0029] (4) According to the above technical means, the structure of the column body is simple and stable, which is conducive to increasing the oil flow rate of the oil passage.

[0030] (5) According to the above technical means, it is convenient to insert the locking finger and the locking sleeve into the wedge-shaped liquid channel, and it is also convenient to fix the relative position between the injection seat and the stator core. The setting of the thinning groove can reduce the difficulty of deformation of the locking finger. The locking finger is pressed against the side wall of the wedge-shaped liquid channel, which can improve the sealing effect and position stability. The combination of the step and the locking groove can improve the relative position reliability between the stator core and the injection seat.

[0031] (6) According to the above technical means, coolant can be added to the wedge-shaped liquid channel through the oil inlet structure.

[0032] (7) According to the above technical means, the top end of the sealing ring is easily deformed to seal the end face of the oil injection seat and the stator core, which can increase the sealing effect between the oil injection seat and the stator core.

[0033] (8) According to the above technical means, each fuel injection seat is small in size, easy to produce, process and install, and can save costs.

[0034] (9) According to the above technical means, it is possible to avoid setting up a liquid channel on the outer peripheral surface of the stator core, and the wedge-shaped liquid channel is easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 It is a structural schematic diagram of a stator assembly in which the outer peripheral surface of the stator core is not provided with mounting ears in the present invention.

[0037] Figure 2 It is a structural schematic diagram of a stator assembly in which mounting ears are provided on the outer peripheral surface of the stator core in the present invention.

[0038] Figure 3 It is an exploded view of a stator assembly in which no mounting ears are provided on the outer peripheral surface of the stator core in the present invention.

[0039] Figure 4 It is a structural schematic diagram of a stator core without mounting ears in the present invention.

[0040] Figure 5 yes Figure 4 Partial cross-sectional view along line AA.

[0041] Figure 6 This is one of the structural diagrams of the fuel injection seat of the present invention.

[0042] Figure 7 This is the second structural diagram of the oil injection seat of the present invention.

[0043] Figure 8 yes Figure 7 A partial enlarged view of area A in the middle.

[0044] Figure 9 This is one of the structural diagrams of the lock pin of the present invention.

[0045] Figure 10 This is the second structural diagram of the lock pin of the present invention.

[0046] Figure 11 It is a schematic diagram of the cooperation between the lock pin, the oil injection seat and the stator core when the positioning block of the present invention cooperates with the first positioning hole.

[0047] Figure 12 It is a schematic diagram of the cooperation between the lock pin, the oil injection seat and the stator core when the positioning block of the present invention cooperates with the second positioning hole.

[0048] Figure 13 It is a structural schematic diagram of an oil injection seat provided with an oil inlet structure according to an embodiment of the present invention.

[0049] Figure 14 It is a structural schematic diagram of another embodiment of the present invention in which an oil injection seat is provided with an oil inlet structure.

[0050] Description of reference numerals:

[0051] 1. Stator assembly; 100. Stator core; 101. Stator cooling channel; 102. Wedge-shaped channel; 1021. First end; 1022. Second end; 1023. Step; 110. Middle lamination; 111. Middle oil hole; 120. End lamination; 121. End oil hole; 130. Mounting lug; 140. Notch; 200. Oil spray seat; 210. Seat body; 211. Oil spray port; 220. Lock sleeve; 221. Oil inlet hole; 222. Auxiliary mounting port; 223. Positioning port; 230. Lock finger; 231. First inclined surface; 23 2. Thinning groove; 233. Locking groove; 240. Sealing ring; 250. Protrusion; 260. Groove; 270. Oil inlet structure; 271. Oil inlet; 300. Locking pin; 310. Wedge-shaped structure; 311. Second inclined surface; 320. Positioning column; 321. Base; 3211. Oil groove; 3212. Oil hole; 322. Column body; 3221. First column; 3222. Second column; 3223. Connector; 323. Oil passage; 330. Positioning block; 400. Stator winding; 500. Insulation paper; 600. Busbar. DETAILED DESCRIPTION

[0052] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0053] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0054] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0055] In an embodiment of the present invention, a stator assembly 1 is proposed. The stator assembly 1 may be a part of a motor, such as Figure 3 、 Figure 5-Figure 14 As shown, the stator assembly 1 includes a stator core 100 , an oil injection seat 200 and a locking pin 300 .

[0056] The stator core 100 is provided with a stator cooling liquid channel 101 and a wedge-shaped liquid channel 102. Both the stator cooling liquid channel 101 and the wedge-shaped liquid channel 102 extend along the axial direction of the stator core 100 and are arranged along the axial direction of the stator core 100. The wedge-shaped liquid channel 102 has a first end 1021 and a second end 1022 that are oppositely disposed. The first end 1021 passes through one end surface of the stator core 100 to form an opening. The second end 1022 of the wedge-shaped liquid channel 102 is connected to the stator cooling liquid channel 101. From the first end 1021 to the second end 1022, the size of the wedge-shaped liquid channel 102 gradually increases in a predetermined direction (the direction indicated by arrow X). The predetermined direction is perpendicular to the axial direction of the stator core 100. Specifically, the predetermined direction can be the radial direction of the stator core 100 or the circumferential direction of the stator core 100.

[0057] The oil injection seat 200 includes a seat body 210, a locking sleeve 220 and a locking finger 230. The locking sleeve 220 and the locking finger 230 are both connected to the seat body 210, and the locking sleeve 220 and the locking finger 230 are both inserted into the wedge-shaped liquid channel 102. The locking sleeve 220 and the locking finger 230 are arranged along a preset direction, and the locking finger 230 can be deformed along the preset direction. The seat body 210 is provided with a liquid spray flow channel, and the liquid spray flow channel forms an oil injection port 211 on the seat body 210. The oil injection port 211 can be located on a side of the seat body 210 facing away from the stator core 100, or the oil injection port 211 is located on the side of the seat body 210. The locking sleeve 220 is provided with an oil inlet hole 221, and the oil inlet hole 221 is connected to the liquid spray flow channel and the wedge-shaped liquid channel 102.

[0058] The locking pin 300 includes a wedge-shaped structure 310, which is inserted between the locking sleeve 220 and the locking finger 230. Along the direction from the first end 1021 to the second end 1022, the size of the wedge-shaped structure 310 in the preset direction gradually increases. The locking pin 300 abuts against the bottom wall of the wedge-shaped liquid channel 102, that is, the locking pin 300 abuts against the end wall of the second end 1022. The wedge-shaped structure 310 drives the locking finger 230 to open in the preset direction, that is, the wedge-shaped structure 310 presses the locking finger 230 against the side wall of the wedge-shaped liquid channel 102, so that in the preset direction, the maximum size of the part of the injection seat 200 inserted into the wedge-shaped liquid channel 102 is larger than the opening size of the first end 1021.

[0059] For example, the oil injection seat 200 and the locking pin 300 can be made of oil-resistant plastic material. Figure 1-Figure 3 As shown, the stator core 100 is further provided with a slot 140 for installing insulating paper 500 and the stator winding 400. The stator winding 400 is formed by winding and connecting oxygen-free copper wire with insulating paint according to a certain span. The insulating paper 500 is installed between the side wall of the slot 140 of the stator core 100 and the straight section of the stator winding 400. It is used to insulate the stator winding 400 from the stator core 100 and to connect the stator winding 400 to the motor controller through a bus 600. The bus 600 can be a star-point copper bus or a three-phase copper bus, so that the current flows in the stator winding 400 in the direction required by the design to achieve the correct operation of the motor. In the radial direction of the stator core 100, the oil spray seat 200 is located outside the slot 140, and the angle of the oil spray port 211 is adapted to the stator winding 400 to achieve the best spray cooling effect on the stator winding 400.

[0060] In the present invention, the stator cooling liquid channel 101 of the stator core 100 can be filled with coolant. The coolant can be water, oil, or other liquid that can be used for cooling and dissipating heat. When the motor is running, the coolant flows in the stator cooling liquid channel 101 to dissipate heat for the stator core 100, and the coolant will flow into the oil spray seat 200 through the wedge-shaped liquid channel 102, the oil inlet hole 221 and the wedge-shaped liquid channel 102, and then be sprayed out from the oil spray port 211 to dissipate heat for the end face of the stator core 100 and the stator winding 400 installed on the stator core 100.

[0061] In the present invention, the wedge structure 310 is first inserted between the lock sleeve 220 and the lock finger 230, and then the lock pin 300, the lock sleeve 220 and the lock finger 230 are inserted into the wedge-shaped liquid channel 102. Finally, the lock pin 300 abuts against the bottom wall of the wedge-shaped liquid channel 102, and the fuel injection seat 200 is continuously pressed. The depth of the wedge structure 310 inserted into the lock sleeve 220 and the lock finger 230 gradually increases. Since the size of the wedge structure 310 in the preset direction gradually increases from the first end 1021 to the second end 1022, as the wedge structure 310 is inserted into the lock sleeve 220 and the lock finger 230, the wedge structure 310 is inserted into the lock sleeve 220 and the lock finger 230. As the depth of the structure 310 inserted into the locking sleeve 220 and the locking finger 230 increases, the locking finger 230 is pushed by the wedge-shaped structure 310 to deform in the direction away from the locking finger 230, causing the maximum size of the portion of the fuel injection seat 200 inserted into the wedge-shaped liquid channel 102 to continue to increase until the maximum size of the portion of the fuel injection seat 200 inserted into the wedge-shaped liquid channel 102 is larger than the opening size of the first end 1021. At this time, the fuel injection seat 200 cannot be pulled out of the wedge-shaped liquid channel 102, thereby achieving fixation between the fuel injection seat 200, the locking pin 300 and the stator core 100.

[0062] It can be seen from this that in the present invention, the connection structure between the oil spray seat 200 and the stator core 100 is inserted into the stator core 100, and the connection between the oil spray seat 200 and the stator core 100 will not be exposed to the outside of the stator assembly 1, which can effectively reduce the probability of coolant leakage and improve heat dissipation efficiency.

[0063] Specifically, the fuel injection seat 200 can be provided with two locking fingers 230 and a locking sleeve 220, and the two locking fingers 230 are located on opposite sides of the locking sleeve 220. The locking pin 300 includes two wedge-shaped structures 310, one wedge-shaped structure 310 is inserted between one locking finger 230 and the locking sleeve 220, and the other wedge-shaped structure 310 is inserted between the other locking finger 230 and the locking sleeve 220. In this way, the maximum size of the part of the fuel injection seat 200 inserted into the wedge-shaped liquid channel 102 is larger, which is conducive to fixing the relative position between the fuel injection seat 200 and the stator core 100.

[0064] Furthermore, the fuel injection seat 200 can include multiple locking sleeves 220, which are spaced apart along the extension direction of the fuel injection seat 200. Locking fingers 230 are provided on opposite sides of each locking sleeve 220. There are multiple locking pins 300, which are arranged in a one-to-one correspondence with the multiple locking sleeves 220. Each locking pin 300 includes two wedge-shaped structures 310, and the two wedge-shaped structures 310 of each locking pin 300 are inserted between the corresponding locking sleeve 220 and the two locking fingers 230. The stator core 100 is provided with multiple wedge-shaped fluid channels 102, and each locking sleeve 220 has a corresponding wedge-shaped fluid channel 102.

[0065] In this way, the oil injection seat 200 and the stator core 100 are connected at multiple points, which can improve the reliability of the relative position between the oil injection seat 200 and the stator core 100 and effectively limit the relative position between the oil injection seat 200 and the stator core 100.

[0066] like Figure 1-Figure 3 、 Figure 5 As shown, in some embodiments, a wedge-shaped liquid channel 102 is provided at each end of the stator core 100, and an oil spray seat 200 is provided at each end of the stator core 100. The oil spray seat 200 is inserted into the corresponding wedge-shaped liquid channel 102 to achieve cooling of the opposite ends of the stator core 100.

[0067] like Figures 8-12 As shown, in some embodiments, the sidewall of the oil inlet hole 221 is provided with an auxiliary installation opening 222 and a positioning opening 223. The auxiliary installation opening 222 is closer to the bottom wall of the wedge-shaped liquid channel 102 than the positioning opening 223. The locking pin 300 further includes a positioning post 320 and a positioning block 330. The positioning post 320 is connected to the wedge-shaped structure 310 and is at least partially inserted into the oil inlet hole 221. The positioning block 330 is provided at the portion of the positioning post 320 inserted into the oil inlet hole 221. The size of the positioning block 330 gradually increases in a predetermined direction from the first end 1021 to the second end 1022. The positioning block 330 first engages with the auxiliary installation opening 222 and ultimately engages with the positioning opening 223.

[0068] Specifically, during the assembly of the stator core 100, the positioning column 320 is first inserted into the oil inlet hole 221, and the positioning block 330 cooperates with the auxiliary installation port 222 to prevent the oil injection seat 200 and the locking pin 300 from separating. At this time, the wedge-shaped structure 310 is inserted between the locking sleeve 220 and the locking finger 230. The insertion depth of the wedge structure 310 is small, and the deformation amplitude of the locking finger 230 in the preset direction is small; then, the locking sleeve 220, the locking finger 230 and the locking pin 300 are inserted into the wedge-shaped liquid channel 102 until the locking pin 300 stops at the bottom wall of the wedge-shaped liquid channel 102; finally, continue to press the oil injection seat 200, the locking sleeve 220 and the locking finger The size of the finger 230 inserted into the wedge-shaped liquid channel 102 increases, and the positioning block 330 separates from the auxiliary installation port 222 until the positioning block 330 cooperates with the positioning port 223. At this time, the fuel injection seat 200 is installed in place, and the depth of the wedge-shaped structure 310 inserted between the locking sleeve 220 and the locking finger 230 increases. The deformation amplitude of the locking finger 230 in the preset direction increases, and the maximum size of the part of the fuel injection seat 200 inserted into the wedge-shaped liquid channel 102 is greater than the size of the first end 1021. The fuel injection seat 200 and the locking pin 300 are difficult to separate from the wedge-shaped liquid channel 102, thereby fixing the relative positions of the fuel injection seat 200, the locking pin 300 and the stator core 100.

[0069] In some embodiments, as Figure 9 and Figure 10 As shown, the positioning column 320 includes a base 321 and a column body 322. The base 321 is connected to the wedge-shaped structure 310. The side of the base 321 facing the bottom wall of the wedge-shaped fluid channel 102 is provided with an oil groove 3211, which is connected to the wedge-shaped fluid channel 102. The base 321 is provided with an oil hole 3212, which is connected to the oil groove 3211. The column body 322 is provided on the side of the base 321 facing the oil injection seat 200 and is inserted into the oil inlet hole 221. The positioning block 330 is provided on the outer circumference of the column body 322. The column body 322 is provided with an oil passage 323, which is connected to the oil hole 3212 and the oil inlet hole 221.

[0070] Since at least a portion of the positioning post 320 is inserted into the oil inlet hole 221, the positioning post 320 will occupy the space of the oil inlet hole 221. Therefore, in order to avoid blockage between the oil inlet hole 221 and the wedge-shaped liquid channel 102, an oil hole 3212 and an oil groove 3211 are provided on the base 321. The coolant in the wedge-shaped liquid channel 102 can flow into the oil hole 3212 through the oil groove 3211, and then flow into the oil inlet hole 221 through the oil passage 323, and finally be sprayed out from the oil nozzle 211 through the spray channel, thereby cooling the end face of the stator core 100.

[0071] Furthermore, if Figure 10 As shown, the column body 322 includes a connector 3223, a first column 3221, and a second column 3222. The first column 3221 and the second column 3222 are both connected to the base 321, and the first column 3221 and the second column 3222 are arranged on opposite sides of the oil hole 3212. The oil passage 323 is located between the first column 3221 and the second column 3222. The positioning block 330 is provided on the first column 3221 and / or the second column 3222. The connector 3223 is connected between the first column 3221 and the second column 3222, and the connector 3223 is spaced apart from the base 321.

[0072] Specifically, a positioning block 330 is provided on the side of the first column 3221 facing away from the second column 3222, or a positioning block 330 is provided on the side of the second column 3222 facing away from the first column 3221, or a positioning block 330 is provided on the side of the first column 3221 facing away from the second column 3222, and a positioning block 330 is provided on the side of the second column 3222 facing away from the first column 3221.

[0073] Thus, the structure of the column body 322 is simpler, and the oil flow area of the oil flow channel 323 can be increased, thereby increasing the amount of oil flow per unit time and ensuring the cooling effect on the stator end face. When the column body 322 is inserted into the oil inlet hole 221, the inner wall of the oil inlet hole 221 also restricts the flow of coolant in the oil flow channel 323, further preventing coolant leakage.

[0074] By setting the connector 3223, the relative position between the first column 3221 and the second column 3222 can be fixed, the structural strength of the column body 322 is increased, and the probability of damage to the column body 322 is reduced. In addition, the connector 3223 is spaced apart from the base 321, which can increase the oil flow area of the oil channel 323, thereby increasing the oil flow rate per unit time and ensuring the cooling effect on the stator end face.

[0075] In some embodiments, as Figures 8-10 As shown, the locking finger 230 is provided with a first inclined surface 231 on the side facing the locking sleeve 220, and the wedge-shaped structure 310 is provided with a second inclined surface 311 on the side facing away from the locking sleeve 220. The first inclined surface 231 and the second inclined surface 311 can be slidably fitted together, and the first inclined surface 231 and the second inclined surface 311 are both inclined relative to the axial direction of the stator core 100.

[0076] That is, the end of the locking finger 230 closer to the wedge-shaped structure 310 is thinner, and the end of the locking finger 230 farther from the wedge-shaped structure 310 is thicker. The end of the wedge-shaped structure 310 closer to the locking finger 230 is thinner, and the end of the wedge-shaped structure 310 farther from the locking finger 230 is thicker.

[0077] Thus, when the wedge-shaped structure 310 is initially inserted between the locking finger 230 and the locking sleeve 220, the wedge-shaped structure 310 cooperates with the thinner portion of the locking finger 230 to prevent excessive deformation of the locking finger 230, thereby facilitating the insertion of the locking finger 230 and the locking sleeve 220 into the wedge-shaped fluid passage 102. After the locking finger 230 and the locking sleeve 220 are inserted into the wedge-shaped fluid passage 102, the wedge-shaped structure 310 cooperates with the thicker portion of the locking finger 230 to effectively increase the deformation amplitude of the locking finger 230, thereby achieving fixation between the fuel injection seat 200 and the stator core 100.

[0078] In some embodiments, as Figure 8 As shown, a thinning groove 232 is provided at one end of the locking finger 230 connected to the base 210. In a predetermined direction, the thinning groove 232 is located on at least one side of the locking finger 230, that is, the thinning groove 232 is located on the side of the locking finger 230 facing the locking sleeve 220, or the thinning groove 232 is located on the side of the locking finger 230 facing away from the locking sleeve 220, or the thinning groove 232 is located on two opposite sides of the locking finger 230.

[0079] In this way, the structural strength of the end where the locking finger 230 is connected to the base body 210 can be reduced, which is conducive to the elastic deformation of the end where the locking finger 230 is connected to the base body 210. On the one hand, it is convenient for the locking finger 230 to approach or move away from the locking sleeve 220, that is, it is convenient for the wedge-shaped structure 310 to be inserted between the locking finger 230 and the locking sleeve 220. On the other hand, it can prevent the locking finger 230 from being easily deformed and broken, thereby extending the service life of the locking finger 230.

[0080] In some embodiments, as Figure 12 As shown, the wedge-shaped structure 310 presses the locking finger 230 against the side wall of the wedge-shaped liquid channel 102. On the one hand, it can reduce the gap between the locking finger 230 and the side wall of the wedge-shaped liquid channel 102, improving the sealing effect. On the other hand, it can reduce the probability of shaking of the fuel injection seat 200, improve the fixing effect between the fuel injection seat 200 and the stator core 100, and improve the positioning reliability.

[0081] In some embodiments, as Figure 8 As shown, a locking groove 233 is provided on the side of the locking finger 230 facing away from the locking sleeve 220, and a step 1023 is provided on the side wall of the wedge-shaped liquid channel 102. The step 1023 is engaged with the locking groove 233. In this way, the relative position between the fuel injection seat 200 and the stator core 100 can be more effectively fixed, preventing the fuel injection seat 200 from being pulled out of the wedge-shaped liquid channel 102.

[0082] In some embodiments, Figure 7 and Figure 8 As shown, the fuel injection seat 200 also includes a sealing ring 240, which is arranged on the side of the seat body 210 facing the stator core 100, and the sealing ring 240 surrounds the locking sleeve 220 and the locking finger 230. The sealing ring 240 abuts against the end face of the stator core 100, and the thickness of the sealing ring 240 gradually decreases from its bottom to its top.

[0083] Specifically, the sealing ring 240 and the seat body 210 are an integral structure, and the sealing ring 240 is also made of oil-resistant plastic material. The thickness of the sealing ring 240 is gradually reduced from its bottom to its top, that is, the thickness of the top of the sealing ring 240 is thinner, which is convenient for elastic deformation. After the injection seat 200 and the stator core 100 are connected, the sealing ring 240 abuts against the end face of the stator core 100, and the sealing ring 240 is elastically deformed under pressure to achieve sealing between the sealing ring 240 and the end face of the stator core 100, which can prevent the coolant from leaking from between the injection seat 200 and the end face of the stator core 100.

[0084] In some embodiments, Figure 1-Figure 3 As shown, there are multiple oil injection seats 200, which are arranged along the circumference of the stator core 100. The ends of the seat body 210 are provided with a protrusion 250 or a groove 260. The ends of two adjacent seat bodies 210 are plugged into each other through the protrusion 250 and the groove 260. The groove 260 penetrates the seat body 210 along the axial direction of the stator core 100.

[0085] For example, each seat body 210 has a protrusion 250 at one end and a groove 260 at the other end, or one of two adjacent seat bodies 210 has protrusions 250 at both ends and the other seat body 210 has grooves 260 at both ends.

[0086] By means of the protrusion 250 and the groove 260 on the seat body 210, two adjacent fuel injection seats 200 can be connected and positioned, with high positioning accuracy and convenient matching.

[0087] Specifically, multiple oil injection seats 200 are connected end to end in sequence to form a ring, which not only can cool various areas of the end surface of the stator core 100, but also ensure the cooling uniformity and efficiency. In addition, compared with the oil injection ring in the prior art, each oil injection seat 200 is smaller in size, which reduces costs and facilitates assembly.

[0088] like Figure 13 and Figure 14 As shown, the oil spray seat 200 further includes an oil inlet structure 270, which is disposed on the side of the seat body 210 facing away from the stator core 100. The oil inlet structure 270 is provided with an oil inlet port 271, and the spray flow channel is connected to the oil inlet port 271. In this way, coolant can be poured into the stator cooling liquid channel 101 and the wedge-shaped liquid channel 102 through the oil inlet structure 270. The coolant flows from the oil inlet port 271 into the stator cooling liquid channel 101 and the wedge-shaped liquid channel 102, thereby cooling the stator core 100.

[0089] In some embodiments, as Figure 14 As shown, the oil inlet 271 is provided at one end of the oil inlet structure 270 away from the seat body 210. At this time, the oil inlet structure 270 can be a cylinder, and the axial direction of the oil inlet structure 270 is the same as the axial direction of the stator core 100. The coolant can flow into the oil inlet structure 270 through the end face of the motor housing. At this time, the motor housing and the stator assembly 1 can be installed by bolts or interference press-fit.

[0090] In other embodiments, Figure 13 As shown, in the radial direction of the stator core 100, the oil inlet 271 is arranged on the outer side surface of the oil inlet structure 270, and the outer side surface of the oil inlet structure 270 and the outer side surface of the base body 210 can be located on the same plane. At this time, the oil inlet structure 270 is a roughly arc-shaped structure, and the coolant can flow into the oil inlet structure 270 through the end face of the motor housing. At this time, the motor housing and the stator assembly 1 can be interference pressed.

[0091] According to the cooling flow requirement of the stator assembly 1 , an oil inlet 271 may be provided on one or more oil injection seats 200 .

[0092] In some embodiments, as Figure 4As shown, the stator cooling liquid channel 101 and the wedge-shaped liquid channel 102 are both provided between the inner and outer circumferences of the stator core 100. This avoids directly slotting the outer circumference of the stator core 100. On the one hand, mounting ears 130 can be provided on the outer circumference of the stator core 100, and the stator core 100 can be fixed to the mounting ears 130 and the motor housing by bolts. That is, the motor can be fixed to the stator assembly 1 and the motor housing by threaded mounting. On the other hand, in a motor in which the stator assembly 1 and the motor housing are interference-fitted, the contact area between the stator assembly 1 and the housing is large, ensuring the reliability of the relative position between the stator assembly 1 and the housing.

[0093] In some embodiments, as Figure 5 、 Figure 11 and Figure 12 As shown, the stator core 100 includes a plurality of intermediate laminations 110, which are stacked along the axial direction of the stator core 100. Each intermediate lamination 110 is provided with a plurality of intermediate oil holes 111. The plurality of intermediate oil holes 111 are spaced apart along the circumference of the stator core 100. Along the circumference of the stator core 100, the intermediate oil holes 111 of the intermediate laminations 110 are staggered and connected with the intermediate oil holes 111 of adjacent intermediate laminations 110. Each intermediate oil hole 111 of the intermediate laminations 110 can be connected with two intermediate oil holes 111 of adjacent intermediate laminations 110. The intermediate oil holes 111 of the plurality of intermediate laminations 110 are connected to form a stator cooling liquid channel 101.

[0094] In this way, the coolant in the stator cooling liquid channel 101 can not only flow along the axial direction of the stator core 100, but also flow along the circumferential direction of the stator core 100, so that the cooling uniformity of each area of the stator core 100 is higher and the cooling effect of the stator core 100 is better.

[0095] In some embodiments, as Figure 5 、 Figure 11 and Figure 12 As shown, the stator core 100 includes a plurality of end laminations 120, which are stacked in the axial direction of the stator core 100. Each end lamination 120 is provided with an end oil hole 121. The plurality of end oil holes 121 are connected to form a wedge-shaped liquid channel 102. The plurality of end oil holes 121 are aligned at the center of the circumference of the stator core 100. The size of the end oil holes 121 of the plurality of end laminations 120 in the circumferential direction of the stator core 100 gradually increases from the first end 1021 to the second end 1022.

[0096] For example, multiple end laminations 120 may be provided at both axial ends of the middle lamination 110 , and the multiple end laminations 120 at each end of the middle lamination 110 may form a wedge-shaped liquid channel 102 so that each end of the stator cooling liquid channel 101 is connected to the wedge-shaped liquid channel 102 .

[0097] In this way, the wedge-shaped liquid channel 102 is simple in construction, easy to implement, and can improve production efficiency.

[0098] The present invention also provides a motor, which includes the stator assembly 1 described above.

[0099] The motor according to the embodiment of the present invention utilizes the stator assembly 1 to improve the sealing effect of the coolant and thus improve the heat dissipation efficiency.

[0100] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

[0101] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A stator assembly, characterized in that: include: A stator core (100) is provided with a wedge-shaped liquid channel (102) extending along the axial direction of the stator core (100), the wedge-shaped liquid channel (102) being provided with a first end (1021) and a second end (1022) arranged opposite to each other, the first end (1021) penetrating through an end surface of one side of the stator core (100) to form an opening, and along a direction from the first end (1021) to the second end (1022), the size of the wedge-shaped liquid channel (102) in a preset direction gradually increases, and the preset direction is arranged perpendicular to the axial direction of the stator core (100); The oil spray seat (200) comprises a seat body (210), a locking sleeve (220) and a locking finger (230), wherein the locking sleeve (220) and the locking finger (230) are both connected to the seat body (210) and inserted into the wedge-shaped liquid channel (102), the locking sleeve (220) and the locking finger (230) are arranged along the preset direction, and the locking finger (230) is deformable along the preset direction, the seat body (210) is provided with a liquid spray channel, the locking sleeve (220) is provided with an oil inlet hole (221), and the oil inlet hole (221) is communicated with the wedge-shaped liquid channel (102) and the liquid spray channel; The locking pin (300) comprises a wedge-shaped structure (310), wherein the wedge-shaped structure (310) is inserted between the locking sleeve (220) and the locking finger (230), and the size of the wedge-shaped structure (310) in the preset direction gradually increases along the direction from the first end (1021) to the second end (1022). The locking pin (300) abuts against the end wall of the second end (1022), and the wedge-shaped structure (310) drives the locking finger (230) to open in the preset direction, so that in the preset direction, the maximum size of the portion of the fuel injection seat (200) inserted into the wedge-shaped liquid channel (102) is larger than the opening size of the first end (1021).

2. The stator assembly according to claim 1, characterized in that: The side wall of the oil inlet hole (221) is provided with an auxiliary installation opening (222) and a positioning opening (223), and the auxiliary installation opening (222) is closer to the bottom wall of the wedge-shaped liquid channel (102) than the positioning opening (223); The locking pin (300) further comprises a positioning column (320) and a positioning block (330), wherein the positioning column (320) is connected to the wedge-shaped structure (310) and is at least partially inserted into the oil inlet hole (221), and the positioning block (330) is arranged at the portion of the positioning column (320) inserted into the oil inlet hole (221), and along the direction from the first end (1021) to the second end (1022), the size of the positioning block (330) gradually increases along the preset direction, and the positioning block (330) is first engaged with the auxiliary installation port (222) and finally engaged with the positioning port (223).

3. The stator assembly according to claim 2, characterized in that: The positioning column (320) includes: A base (321) is connected to the wedge-shaped structure (310); an oil groove (3211) is provided on a side of the base (321) facing the second end (1022); the oil groove (3211) is communicated with the wedge-shaped liquid channel (102); and an oil hole (3212) is provided on the base (321); the oil hole (3212) is communicated with the oil groove (3211); The column body (322) is arranged on the side of the base (321) facing the oil injection seat (200) and is inserted into the oil inlet hole (221). The positioning block (330) is arranged on the column body (322). The column body (322) is provided with an oil passage (323). The oil passage (323) is communicated with the oil passage hole (3212) and the oil inlet hole (221).

4. The stator assembly according to claim 3, characterized in that: The column body (322) includes: A first column (3221) and a second column (3222), wherein the first column (3221) and the second column (3222) are both connected to the base (321) and are arranged on opposite sides of the oil hole (3212); the oil passage (323) is located between the first column (3221) and the second column (3222); and the positioning block (330) is arranged on the first column (3221) and / or the second column (3222); The connecting body (3223) is connected between the first column (3221) and the second column (3222), and is spaced apart from the base (321).

5. The stator assembly according to claim 1, wherein: The locking finger (230) is provided with a first inclined surface (231) on a side facing the locking sleeve (220), and the wedge-shaped structure (310) is provided with a second inclined surface (311), the first inclined surface (231) and the second inclined surface (311) are slidably fitted together, and the first inclined surface (231) and the second inclined surface (311) are both arranged to be inclined relative to the axial direction of the stator core (100); And / or, one end of the locking finger (230) connected to the base (210) is provided with a thinning groove (232), and the thinning groove (232) is provided on at least one of the two opposite sides of the locking finger (230) in the preset direction; and / or, the wedge-shaped structure (310) presses the locking finger (230) against the side wall of the wedge-shaped liquid channel (102); And / or, a locking groove (233) is provided on the side of the locking finger (230) facing away from the locking sleeve (220), and a step (1023) is provided on the side wall of the wedge-shaped liquid channel (102), and the step (1023) is engaged in the locking groove (233).

6. The stator assembly according to claim 1, characterized in that: The oil injection seat (200) further comprises an oil inlet structure (270), the oil inlet structure (270) being arranged on a side of the seat body (210) facing away from the stator core (100), the oil inlet structure (270) being provided with an oil inlet (271), and the liquid injection flow channel being in communication with the oil inlet (271); The oil inlet (271) is provided at one end of the oil inlet structure (270) away from the seat body (210), or in the radial direction of the stator core (100), and the oil inlet (271) is provided on the outer side surface of the oil inlet structure (270), and the outer side surface of the oil inlet structure (270) and the outer side surface of the oil injection seat (200) are located on the same curved surface.

7. The stator assembly according to any one of claims 1 to 6, characterized in that: The oil injection seat (200) further includes: A sealing ring (240) is provided on a side of the base (210) facing the stator core (100) and surrounds the locking sleeve (220) and the locking finger (230). The sealing ring (240) abuts against an end surface of the stator core (100).

8. The stator assembly according to any one of claims 1 to 6, characterized in that: There are a plurality of the oil injection seats (200), and the plurality of the oil injection seats (200) are arranged along the circumference of the stator core (100). The end of the seat body (210) is provided with a protrusion (250) or a groove (260), and the ends of two adjacent seat bodies (210) are plugged into and matched with each other through the protrusion (250) and the groove (260).

9. The stator assembly according to any one of claims 1 to 6, characterized in that: The wedge-shaped liquid channels (102) are all provided between the inner circumference and the outer circumference of the stator core (100); And / or, the stator core (100) includes a plurality of end laminations (120), the plurality of end laminations (120) are stacked along the axial direction of the stator core (100), each of the end laminations (120) is provided with an end oil hole (121), the plurality of end oil holes (121) are connected to form the wedge-shaped liquid channel (102), the plurality of end oil holes (121) are aligned at the center in the circumferential direction of the stator core (100), and the sizes of the end oil holes (121) of the plurality of end laminations (120) in the circumferential direction of the stator core (100) gradually increase along the direction from the first end (1021) to the second end (1022).

10. A motor, characterized in that: The invention comprises a stator assembly (1) according to any one of claims 1 to 9.

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