Electric pump

Abstract

An electric pump includes a pump housing, an isolating sleeve, a rotor assembly and a driving assembly, wherein the driving assembly includes a connector, a connecting terminal, a stator assembly and a circuit board, wherein the connector includes a main body, a first slot and a connecting terminal mounting portion; the first slot is a notch formed from the outer periphery of the main body, the stator assembly includes a winding, wherein the first part of the winding is located on the upper side of the main body, the second part of the winding is located on the lower side of the main body, and the connecting portion between the first part and the second part is located in the first slot; the connecting terminal is plugged into the connecting terminal mounting portion, the second part includes a winding end, a part of the winding end is clamped between the first end of the connecting terminal and the connecting terminal mounting portion, the winding end can be electrically connected to the connecting terminal between the first end of the connecting terminal and the connecting terminal mounting portion, and the second end of the connecting terminal is electrically connected to the circuit board. In this way, the assembly of the electric pump is more convenient, and the setting of the connecting terminal can be more flexible.

Description

[Technical field]

[0001] The invention relates to an electric pump which can be applied to a heat pump circulation system or a lubrication system. [Background technology]

[0002] In recent decades, electric pumps have gradually replaced traditional mechanical pumps and have been widely used in vehicle cooling and heating circulation systems, meeting market requirements well.

[0003] The electric pump includes a stator assembly and a circuit board. The connection method between the stator assembly and the circuit board affects the assembly process of the electric pump. Therefore, how to design the connection method between the stator assembly and the circuit board to facilitate the assembly of the electric pump is a technical issue that needs to be considered during the design process. [Summary of the invention]

[0004] The object of the present invention is to provide an electric pump, which involves improving the connection method between a stator assembly and a circuit board, so as to facilitate the assembly of the electric pump.

[0005] The present invention adopts the following technical scheme: an electric pump, comprising a pump housing, an isolating sleeve, a rotor assembly and a driving assembly, wherein the pump housing can form a pump inner cavity, wherein the pump inner cavity comprises a first cavity and a second cavity, wherein the first cavity and the second cavity are not connected, the first cavity is located on the inner side of the isolating sleeve, the second cavity is located on the outer side of the isolating sleeve, at least part of the rotor assembly is located in the first cavity, and at least part of the driving assembly is located in the second cavity; the driving assembly comprises a connector, a connecting terminal, a stator assembly and a circuit board, wherein the connector and the connecting terminal connect the circuit board and the stator assembly as a whole, the connector comprises a main body, a first groove and a connecting terminal mounting portion; the first groove is self-contained The stator assembly includes a winding, a first part of the winding is located on the upper side of the main body, a second part of the winding is located on the lower side of the main body, and a connecting part between the first part and the second part is located in the first groove; the connecting terminal mounting part protrudes from the main body, the connecting terminal is plugged into the connecting terminal mounting part, the second part includes a winding end part, a part of the winding end part is clamped between the first end part of the connecting terminal and the connecting terminal mounting part, the winding end part can be electrically connected to the connecting terminal between the first end part of the connecting terminal and the connecting terminal mounting part, and the second end of the connecting terminal is electrically connected to the circuit board.

[0006] The electric pump includes a driving assembly, which includes a connector, a connecting terminal, a stator assembly and a circuit board. The connector and the connecting terminal connect the circuit board and the stator assembly as a whole. The connector includes a main body, a first groove and a connecting terminal mounting portion. The first part of the winding of the stator assembly is located on the upper side of the main body, the second part of the winding is located on the lower side of the main body, the connecting portion of the winding is located in the first groove, and the end of the winding can be electrically connected to the connecting terminal between the connecting terminal and the terminal mounting portion, and the connecting terminal is electrically connected to the circuit board. In this way, the circuit board and the stator assembly are connected as a whole through the connector and the connecting terminal, the assembly of the electric pump is more convenient, and the setting of the connecting terminal can be more flexible.

Brief Description of the Drawings

[0007] Figure 1 is a cross-sectional structural schematic diagram of a first embodiment of the electric pump provided by the present invention;

[0008] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle drive component from one perspective;

[0009] Figure 3 yes Figure 1 A structural schematic diagram of the stator assembly and the connecting piece from one perspective;

[0010] Figure 4 yes Figure 1 A structural schematic diagram showing another perspective of the combination of the stator assembly and the connector;

[0011] Figure 5 yes Figure 1 A structural schematic diagram of the stator assembly and the connector from another perspective;

[0012] Figure 6 yes Figure 1 A structural schematic diagram of a stator assembly from one perspective;

[0013] Figure 7 yes Figure 1 A structural schematic diagram of a connecting member from one perspective;

[0014] Figure 8 yes Figure 1 A structural diagram of the connecting member from another perspective;

[0015] Fig. 9 yes Figure 1 A structural schematic diagram of a connecting terminal from one perspective;

[0016] Fig.10 yes Figure 1 A structural schematic diagram of another perspective of the connecting terminal;

[0017] Fig.11yes Figure 1 A structural schematic diagram of a second embodiment of the middle drive assembly from one perspective;

[0018] Fig.12 yes Figure 1 A schematic structural diagram of a second embodiment of the combination of a stator assembly and a connecting piece from one perspective. [Specific implementation method]

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] See also Figure 1 , Figure 2 The electric pump 100 is applied to a liquid circulation system. The electric pump can drive the liquid in the circulation system to flow. The liquid in the circulation system can be lubricating oil in a lubrication system or coolant in a coolant system. The following is an introduction using an electric pump applied to a coolant circulation system as an example. The electric pump 100 includes a pump housing, an isolation sleeve 20, a pump shaft 40, a rotor assembly 50, a heat dissipation assembly 60, and a drive assembly 70. The pump housing includes a first housing 10 and a second housing 30. The first housing 10 and the second housing 30 are relatively fixed. The pump housing can form a pump cavity, which includes a first cavity 81 and a second cavity 82. The isolation sleeve 20 relatively isolates the first cavity 81 and the second cavity 82. The first cavity 81 and the second cavity 82 are not connected. The first cavity 81 is located on the inner side of the isolation sleeve 20, and the second cavity 82 is located on the outer side of the isolation sleeve 20. When the electric pump 100 is working, the working medium can flow through the first cavity 81, and no working medium flows through the second cavity 82; at least part of the pump shaft 40 and the rotor assembly 50 are arranged in the first cavity 81, and at least part of the drive assembly 70 is located in the second cavity 82; specifically, part of the isolation sleeve 20 extends into the second housing 30, and another part of the isolation sleeve 20 is located between the first housing 10 and the second housing 30. The connecting part between the first housing 10 and the isolation sleeve 20 and the connecting part between the isolation sleeve 20 and the second housing 30 are provided with an annular sealing ring 90. The annular sealing ring 90 can prevent the working medium from seeping out at the connection, and at the same time prevent the external medium from infiltrating into the pump cavity. The driving assembly 70 includes a connector 1, a stator assembly 2, a circuit board 3 and a connecting terminal 4. The connector 1 and the connecting terminal 4 connect the circuit board 3 and the stator assembly 2 as a whole. The stator assembly 2 extends into the second shell 30 and is relatively fixed to the second shell 30. The connector 1 can be relatively fixed to the stator assembly 2, and the connector 1 can also be relatively fixed to the second shell 30. The heat dissipation assembly 60 is fixedly connected to the second shell 30 for transferring and dissipating the heat of the circuit board 3, thereby facilitating improving the life of the circuit board 3.

[0021] In one technical solution of the present invention, see Figure 2-Figure 10The connector 1 includes a body portion 11, a connection terminal mounting portion 12 and a first groove 16. The first groove 16 and the connection terminal mounting portion 12 are formed on the body portion 11. The body portion 11 includes an upper surface 111 and a lower surface 112. The upper surface 111 and the lower surface 112 are arranged opposite to each other. The side facing the stator assembly 2 is defined as the upper surface 111, and the side facing the circuit board 3 is defined as the lower surface 112. The upper surface 111 side of the body portion 11 is defined as the upper side of the body portion 11, and the side of the lower surface 112 of the body portion 11 is defined as the lower side of the body portion 11; the first groove 16 is formed from the body portion 11 The stator assembly 2 includes a winding 23, the winding 23 includes a winding 231, the winding includes a first portion (not shown in the figure) and a second portion 232, the first portion of the winding 231 is located on the upper side of the main body 11, the second portion 232 of the winding 231 is located on the lower side of the main body 11, and the connecting portion (not shown in the figure) between the first portion and the second portion 232 is located in the first slot 16; the connecting terminal mounting portion 12 protrudes from the main body 11, specifically, the connecting terminal mounting portion 12 is from the main body 11 The lower surface 112 protrudes toward the circuit board, the connecting terminal 4 includes a main portion 44, a first end portion 45 and a second end portion 46, the connecting terminal 4 is plugged into the connecting terminal mounting portion 12, the second portion 232 includes a winding end portion 233, a portion of the winding end portion 233 is clamped between the first end portion 45 of the connecting terminal 4 and the connecting terminal mounting portion 12, the winding end portion 233 can be electrically connected to the connecting terminal 4 between the first end portion 45 of the connecting terminal 4 and the connecting terminal mounting portion 12, the second end portion 46 of the connecting terminal 4 is electrically connected to the circuit board 3, specifically, in this embodiment, the connecting terminal 4 The first end 45 and the winding 231 can be connected electrically by clamping, and the second end 46 of the connecting terminal 4 can be connected electrically by crimping or clamping; in other embodiments, the first end 45 of the connecting terminal 4 and the winding 231 can be clamped and then welded and electrically connected, and the second end 46 of the connecting terminal 4 can be crimped or clamped with the circuit board 3 and then welded and electrically connected; in another embodiment, the first end 45 of the connecting terminal 4 and the winding 231 can be directly welded and electrically connected, and the second end 46 of the connecting terminal 4 can also be directly welded and electrically connected with the circuit board 3. In this way, the circuit board 3 and the stator assembly 2 are connected as a whole through the connecting member 1 and the connecting terminal 4, the assembly of the electric pump is more convenient, and the setting of the connecting terminal 4 can be more flexible. The solution of this embodiment can reduce the welding steps of the winding 231 and the connecting terminal 4, facilitate assembly, and facilitate disassembly; reduce the welding steps of the connecting terminal 4 and the circuit board 3, facilitate disassembly, and reduce the impurities introduced during welding, which is conducive to maintaining the cleanliness of the circuit board 3.In other embodiments, the first end 45 of the connection terminal 4 and the winding 231 can be clamped and then welded, and the second end 46 of the connection terminal 4 can be crimped or clamped with the circuit board 3 and then welded and fixed, which is conducive to further improving the strength of the connection and making the setting of the connection terminal more flexible. In another example, the first end 45 of the connection terminal 4 and the winding 231 can be directly electrically connected by welding, and the second end 46 of the connection terminal 4 and the circuit board 3 can be directly electrically connected by welding, which can also make the setting of the connection terminal more flexible.

[0022] In one technical solution of the present invention, see Figure 2-Figure 10The connecting terminal mounting portion 12 includes a mounting cavity 124, and the first end portion 45 of the connecting terminal 4 includes a first branch portion 451 and a second branch portion 452. The distance between the first branch portion 451 and the second branch portion 452 is smaller than the wire diameter of the winding 231. The connecting terminal mounting portion 12 is formed with a mounting groove 125, and the mounting groove 125 passes through the connecting terminal mounting portion 12 and is perpendicular to the extension direction of the mounting cavity 124. Part of the winding end portion 233 is located in the mounting groove 125, and the first end portion 45 of the connecting terminal 4 is inserted into the mounting cavity 124. The winding end portion 233 is located between the first branch portion 451 and the second branch portion 452 and is tightly matched with the first branch portion 451 and the second branch portion 452. The winding end portion 233 is electrically connected to the first branch portion 451 and the second branch 452 in the mounting groove 125. Specifically, the connection terminal mounting portion 12 includes at least one sub-connection terminal mounting portion. In this embodiment, the connection terminal mounting portion 12 of the connector 1 includes a first connection terminal mounting portion 121, a second connection terminal mounting portion 122 and a third connection terminal mounting portion 123. The first connection terminal mounting portion 121 and the second connection terminal mounting portion 122 are connected by injection molding, and the second connection terminal mounting portion 122 and the third connection terminal mounting portion 123 are connected by injection molding. In this way, the first connection terminal mounting portion 121, the second connection terminal mounting portion 122 and the third connection terminal mounting portion 123 can be arranged in a stacked manner, making the structure relatively compact. Of course, in other embodiments, the first connection terminal mounting portion 121, the second connection terminal mounting portion 122 and the third connection terminal mounting portion 123 can also be arranged in other ways. Taking the first connection terminal mounting portion 121 as an example, the first connection terminal mounting portion 121 includes a mounting cavity 124 and a mounting groove 125. The mounting groove 125 penetrates the first connection terminal mounting portion 121 and is arranged perpendicular to the extension direction of the mounting cavity 124. Part of the winding end 233 is located in the mounting groove 125. The connection terminal 4 includes at least one sub-connection terminal. In this embodiment, the connection terminal 4 includes a first connection terminal 41, a second connection terminal 42 and a third connection terminal 43. The first connection terminal 41 is arranged corresponding to the first connection terminal mounting portion 121, the second connection terminal 42 is arranged corresponding to the second connection terminal mounting portion 122, and the third connection terminal 43 is arranged corresponding to the third connection terminal mounting portion 123. Taking the first connecting terminal 41 as an example, the first connecting terminal 41 includes a main part 44, a first end part 45 and a second end part 46. The main part 44 is located between the first end part 45 and the second end part 46. The first end part 45 includes a first branch part 451 and a second branch part 452. The first branch part 451 and the second branch part 452 extend from the main part 44 to the back of the main part 44. The distance between the first branch part 451 and the second branch part 452 is less than the wire diameter of the winding 231.Taking the first connecting terminal mounting portion 121 and the corresponding first connecting terminal 41 as an example, part of the winding end 233 is located in the mounting groove 125, and the first end 45 of the first connecting terminal 41 is inserted into the mounting cavity 124. The winding end 233 is located between the first branch 451 and the second branch 452 and is tightly matched with the first branch 451 and the second branch 452. The first branch 451 and the second branch 452 can contact the metal part of the winding end 233, so that the winding end 233 is electrically connected to the first branch 451 and the second branch 452 in the mounting groove 125, thereby realizing the electrical connection between the first connecting terminal 41 and the winding 231, which can save the welding step and facilitate installation. The second end 46 of the connecting terminal 4 has a pinhole, and the second end 46 has a certain amount of expansion and contraction. The circuit board 3 has a connecting hole 31 that matches the second end 46. The number of the connecting holes 31 is set corresponding to the number of the connecting terminals 4. The second end 46 and the connecting hole 31 of the circuit board 3 can be fixedly connected by press-fitting, thereby realizing the electrical connection between the connecting terminal 4 and the circuit board 3, which can save the welding step, facilitate disassembly and assembly, facilitate the installation of the circuit board 3, and improve the assembly efficiency. At the same time, it can reduce the impurities introduced during welding, which is conducive to maintaining the cleanliness of the circuit board 3. Of course, in other embodiments, the second end 46 of the connecting terminal 4 is electrically connected to the circuit board 3 by snapping and welding, or the second end 46 of the connecting terminal 4 is not provided with a pinhole, and the connecting terminal 4 is directly electrically connected to the circuit board 3 by welding.

[0023] See also Figure 3 , Figure 5 , Figure 7The connector 1 further includes a limiting portion, which protrudes from the body 11. The limiting portion and the connecting terminal mounting portion 12 have the same protruding direction. After the second portion 232 of the winding 231 is limited by the limiting portion, the winding end portion 233 extends along the extending direction of the mounting groove 125. Specifically, the limiting portion includes a first limiting portion 65, which is located between the end of the first groove 16 and the connecting terminal mounting portion 12. The second portion 232 of the winding 231 is limited to the outer peripheral surface of the first limiting portion 65. The upper end surface of the first limiting portion 65 can also prevent the connecting terminal 4 from being over-pressed when the circuit board 3 is press-fitted. In this embodiment, the limiting portion also includes a second limiting portion 63, and the second limiting portion 63 includes a first portion 631 and a second portion 632. The first portion 631 and the second portion 632 are both columnar bodies formed on the connecting member 1. The first portion 631 and the second portion 632 are spaced apart by a preset distance, and the second portion 232 of the winding 231 is located between the first portion 631 and the second portion 632. In this embodiment, the first portion 631 is slightly larger than the second portion 632, and the first portion 631 is relatively closer to the connecting portion than the second portion 632, which can facilitate winding during assembly. The second limiting portion 63 can guide the routing of the winding 231, and at the same time, the winding end portion 233 can pass through the connecting terminal mounting portion 12 relatively vertically, which is convenient for assembly. The number of second limiting portions 63 can be set as needed. In this embodiment, the number of second limiting portions 63 is 2. The connector 1 further includes a guide portion 62, which is located between the first groove 16 and the limiting portion. The second portion 232 of the winding 231 is guided by the outer periphery of the guide portion 62 and then wound around the limiting portion. In this embodiment, the guide portion 62 includes a columnar portion 621 and an anti-slip portion 622 located at the upper end of the columnar portion. The guide portion 62 can make the layout of the winding 231 reasonable, and the anti-slip portion 622 can prevent the winding 231 from falling off. The number of guide portions 62 can be set as needed. The limiting portion and the guide portion 62 are provided, so that the arrangement of the winding 231 can be reasonable, and it is convenient to guide the winding 231 to the connection terminal mounting portion 12. Through the coordination of the winding 231, the limiting portion, the guide portion 62, the connection terminal mounting portion 12 and the connection terminal 4, the position of the connection terminal mounting portion 12 on the connector 1 has a large degree of freedom in design, and the connection terminal 4 can be arranged more flexibly, and it can be convenient to coordinate with the layout of components of the circuit board 3, thereby optimizing the performance of the electric pump.

[0024] See also Figure 4The connector 1 further includes a first clamping portion 13, which is located on a side of the connection terminal mounting portion 12 away from the limiting portion, and the extension portion 234 at the end of the winding 231 is located on the first clamping portion 13. The connector 1 is formed with an opening portion 14, which is farther away from the connection terminal mounting portion 12 than the first clamping portion 13, and the opening portion 14 passes through the upper and lower surfaces of the main body 11 of the connector 1. Specifically, the first connection terminal mounting portion 121 has a corresponding first clamping portion 13 and an opening portion 14, the second connection terminal mounting portion 122 has a corresponding first clamping portion 13 and an opening portion 14, and the third connection terminal mounting portion 123 has a corresponding first clamping portion 13 and an opening portion 14. The connector 1 further includes a second clamping portion 15, which is located between the first clamping portion 13 and the opening portion 14 corresponding to the third connection terminal mounting portion 123, and the first clamping portion 13 and the second clamping portion 15 are connected by a recessed portion 17. The first clamping portion 13 and the second clamping portion 15 can fix the winding 231, and the opening portion 14 can facilitate the wire cutting tool to cut the winding. The opening portion 14, the recessed portion 17 and the second clamping portion 15 corresponding to the third connection terminal mounting portion 123 can prevent the stator assembly 2 from interfering when cutting the wire.

[0025] See also Figure 4 , Figure 6 The stator assembly 2 further includes a stator core 21 and an insulating portion 22. The insulating portion 22 is fixed to the stator core 21 by injection molding. The stator core 21 provides support for the winding 23. The insulating portion 22 can provide support for the winding 231 led out of the winding 23. The insulating portion 22 includes at least one clamping portion 24. In this embodiment, the number of the clamping portions 24 is 2. The clamping portion 24 is protruding from the insulating portion 22 to the direction where the connector 1 is located. The clamping portion 24 and the insulating portion 22 are integrally injection molded. Of course, in other embodiments, the clamping portion 24 is formed separately and fixed to the insulating portion 22 by welding. The clamping portion 24 includes a supporting portion 241 and a hook portion 242. The hook portion 242 is formed at the top of the supporting portion 241. The connector 1 is provided with a structure that cooperates with the clamping portion 24. The clamping portion 24 can be clamped with the connector 1 to limit the connector 1. This can facilitate the connection between the stator assembly 2 and the connector 1 and facilitate disassembly. Of course, in other embodiments, the insulating portion 22 of the stator assembly 2 may not be provided with the snap-fit ​​portion 24, but may be provided with a columnar structure, which is fixed to the connector 1 by hot riveting, which can improve the stability of the structure, or the snap-fit ​​portion and the columnar structure may be provided at the same time, which can improve the stability of the structure.

[0026] See also Figure 3 , Figure 4 , Figure 7The main body 11 of the connector 1 further includes a side portion 113, which is disposed around the periphery of the main body 11. The side portion 113 is disposed protrudingly from the main body 11 in the direction where the stator assembly 2 is located. The side portion 113 can abut against the inner circumference of the second housing 30 of the pump housing to provide support for the drive assembly 70. The side portion 113 includes a plurality of extension portions 114, which are used to abut against the stator assembly 2 for position limiting. The extension portions 114 extend from the side portion 113 to the side where the stator assembly 2 is located. The extension portions 114 are disposed at intervals along the side portion 113, which can save materials. Of course, in other embodiments, directly extending the side portion 113 can also play the same role as the extension portion 114. The stator core 21 of the stator assembly 2 is provided with a plurality of protrusions 25 on its periphery. The protrusions 25 are provided to protrude from the stator core 21 toward the periphery. The ends of the protrusions 25 can abut and cooperate with the ends of the extension portions 114 , thereby achieving abutment and limiting of the stator assembly 2 and the connector 1 . The connector 1 also includes a snap-fitting portion 115, which is formed on the main body 11. The snap-fitting portion 115 cooperates with the snap-fitting portion 24 of the stator assembly 2 to achieve snap-fit ​​limiting between the stator assembly 2 and the connector 1. The snap-fitting portion 115 can be a structure recessed from the outer periphery of the main body 11 to the center of the main body 11 or a through hole that passes through the main body 11. The supporting portion 241 of the snap-fitting portion 24 of the stator assembly 2 has a certain elasticity. The supporting portion 241 of the snap-fitting portion 24 passes through the snap-fitting portion 115 and abuts against the lower surface 111 of the main body 11 through the hook portion 242 to fix the connector 1. This can facilitate the connection between the stator assembly 2 and the connector 1 and facilitate disassembly and assembly.

[0027] See also Figure 8 The connector 1 further includes a reinforcing rib 116, which is protruded from the main body 11 toward the direction of the stator assembly. The reinforcing rib 116 includes a circumferential reinforcing rib 117 and a radial reinforcing rib 118. The circumferential reinforcing rib includes at least one layer of roughly annular protrusions, which may be circular, square or other shapes. The radial reinforcing diameter is roughly distributed along the radial direction of the main body. The circumferential reinforcing rib and the radial reinforcing rib are connected by injection molding. The provision of the reinforcing rib 116 can improve the stability of the connector structure.

[0028] See also Figure 2 , Figure 7, the connector 1 also includes a plurality of limit bodies 7, and the limit bodies 7 are protruding from the main body toward the direction where the circuit board is located. In the present embodiment, the limit bodies 7 include a first limit body 71, a second limit body 72, and a third limit body 73. The limit bodies 7 have a limit column 74 and a reinforcing portion 75. The reinforcing portion 75 is arranged on the periphery of the limit column 74 to improve the strength of the limit column 74. Taking the first limit body as an example, in the present embodiment, the first limit body 71 has three reinforcing portions 75, and the second limit body 72 and the third limit body 73 have two reinforcing portions respectively. Of course, in other embodiments, the number of reinforcing portions of the limit bodies is not limited to two or three. The upper end of the reinforcing portion 75 has an abutting surface portion 76, and the height of the abutting surface portion 76 is lower than the upper end surface of the limit column 74. The abutting surface portion 76 can abut and cooperate with the circuit board 3 to provide support for one end surface of the circuit board 3. See. Figure 2 , Figure 7 The circuit board 3 has a mounting hole 32 corresponding to the limiting column 74. After the limiting column passes through the corresponding mounting hole 32 on the circuit board 3, one side of the circuit board 3 abuts against the abutting surface 76 of the limiting portion 7, and the other side is fixed by hot-melt riveting the limiting column 74, thereby realizing the relative limiting of the circuit board 3 and the connector 1. In other embodiments, the number of limiting portions 7 may not be limited to three.

[0029] See also Figure 4 , Figure 6 The stator assembly 2 also includes a fixing portion 125 and a fixing member 126, which are used to electrically connect the partial winding 231 led out of the winding 23, so as to electrically connect the windings 23. In this embodiment, the fixing portion 125 is formed on the insulating portion 22 of the stator assembly 2, and is protruded from the insulating portion 22 to the direction where the connector 1 is located. The fixing portion 125 is similar in structure to a portion of the connecting terminal mounting portion 12, and the fixing member 126 is the same as or similar to the connecting terminal 4, which can reduce development costs. The fixing portion 125 is also provided with a clamping portion and a guiding portion to facilitate winding and routing. Of course, in other embodiments, the fixing member 126 can also be in other forms. For example, the fixing member 126 can be a structure in which the second end 46 of the connecting terminal 4 is omitted, which can also reduce costs.

[0030] See also Figure 8 The driving component 70 is also provided with a grounding plate 8, and the connecting member 1 is provided with a structure for fixing the grounding plate 8. The stator core 21 of the stator component 2 can be electrically connected to the ground terminal of the circuit board 3 through the grounding plate 8, which is beneficial to optimizing the EMC performance of the electric pump.

[0031] See also Fig.10 , Fig.11In the second embodiment of the driving assembly 70, the connector 1a further includes a limiting body 11a and a buckle portion 12a. The limiting body 11a is similar to the limiting body structure of the first embodiment. The buckle portion 12a includes a clamping portion 13a and a bracket 14a. The height of the bracket 14a is less than the height of the clamping portion 13a. The clamping portion 13a includes a supporting portion 15a and a hook portion 16a. The hook portion 16a can limit one end face of the circuit board. The bracket 14a abuts against the lower end face of the circuit board to limit the other end face of the circuit board. The buckle portion 12a can further fix the circuit board to improve the structural stability. Relative to the first embodiment, a clamping portion 17a is provided to guide the winding. The clamping portion 17a has a semicircular groove that can fix the wire. This structure is relatively simple and can reduce the amount of processing. Relative to the first embodiment, the opening portion 14 is not provided, which can also make the structure relatively simple and reduce the amount of processing.

[0032] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An electric pump, comprising a pump housing, an isolation sleeve, a rotor assembly and a drive assembly, wherein the pump housing can form a pump inner cavity, the pump inner cavity comprises a first cavity and a second cavity, the first cavity and the second cavity are not connected, a working medium can flow through the first cavity, and no working medium flows through the second cavity, the first cavity is located on the inner side of the isolation sleeve, the second cavity is located on the outer side of the isolation sleeve, at least part of the rotor assembly is located in the first cavity, and at least part of the drive assembly is located in the second cavity; Features: The drive assembly includes a connector, a connecting terminal, a stator assembly and a circuit board, the connector and the connecting terminal connect the circuit board and the stator assembly as a whole, the connector includes a main body, a first groove and a connecting terminal mounting portion; the first groove includes a plurality of first grooves, the first groove is a notch formed from the outer periphery of the main body, the stator assembly includes a winding, the first part of the winding is located on the upper side of the main body, the second part of the winding is located on the lower side of the main body, and the connecting part between the first part and the second part is located in the first groove; the connecting terminal mounting portion protrudes from the main body, the connecting terminal is plugged into the connecting terminal mounting portion, the second part includes a winding end portion, part of the winding end portion is clamped between the first end portion of the connecting terminal and the connecting terminal mounting portion, the winding end portion can be electrically connected to the connecting terminal between the first end portion of the connecting terminal and the connecting terminal mounting portion, and the second end of the connecting terminal is electrically connected to the circuit board.

2. The electric pump according to claim 1, Features: The connecting terminal mounting portion includes a mounting cavity, the first end portion of the connecting terminal includes a first branch and a second branch, the distance between the first branch and the second branch is smaller than the wire diameter of the winding, the connecting terminal mounting portion is formed with a mounting groove, the mounting groove passes through the connecting terminal mounting portion and is perpendicular to the extension direction of the mounting cavity, part of the winding end portion is located in the mounting groove, the first end portion of the connecting terminal is inserted into the mounting cavity, the winding end portion is located between the first branch and the second branch and is tightly matched with the first branch and the second branch, and the winding end portion is electrically connected to the first branch and the second branch in the mounting groove; the second end portion of the connecting terminal is connected to the circuit board by snapping.

3. The electric pump according to claim 2, Features: The connector also includes a limiting portion, which protrudes from the main body and has the same protruding direction as the connection terminal mounting portion. After the second portion is limited by the limiting portion, the winding end extends along the extension direction of the mounting groove.

4. The electric pump according to claim 3, Features: The limiting portion includes a first limiting portion, the first limiting portion is located between the end of the first groove and the connection terminal mounting portion, and the second portion of the winding is limited to the outer peripheral surface of the first limiting portion.

5. The electric pump according to claim 4, Features: The limiting portion also includes a second limiting portion, which includes a first portion and a second portion, wherein the first portion and the second portion are both columnar bodies formed on the connecting member, the first portion and the second portion are spaced apart by a preset distance, and a portion of the second portion is located between the first portion and the second portion.

6. The electric pump according to any one of claims 3 to 5, Features: The connecting member further comprises a guide portion, wherein the guide portion is located between the first groove and the limiting portion, and a portion of the second portion is guided by the outer circumference of the guide portion and then surrounds the limiting portion.

7. The electric pump according to claim 6, Features: The connector also includes a first clamping portion, which is located on a side of the connecting terminal mounting portion away from the limiting portion, and the extension portion of the winding end is located on the first clamping portion. The connector is formed with an opening portion, which is farther away from the connecting terminal mounting portion than the first clamping portion, and the opening portion passes through the upper and lower surfaces of the connector.

8. The electric pump according to claim 7, Features: The connecting member further includes a second clamping portion, the second clamping portion is located between the first clamping portion and the opening portion, and the first clamping portion and the second clamping portion are connected via a recessed portion.

9. The electric pump according to any one of claims 1 to 5, Features: The stator assembly also includes a stator core and an insulating part, the insulating part is injection-molded and fixed to the stator core, the insulating part has a clamping part, the clamping part includes a supporting part and a hook part, the hook part is located at the top of the supporting part, the connecting piece also includes a clamping part, the clamping part is recessed from the outer periphery of the main body part to the center of the main body part or is a through hole penetrating the main body part, the supporting part passes through the clamping part and cooperates with the main body part through the hook part to connect the stator assembly and the connecting piece.

10. The electric pump according to claim 6, Features: The stator assembly also includes a stator core and an insulating part, the insulating part is injection-molded and fixed to the stator core, the insulating part has a clamping part, the clamping part includes a supporting part and a hook part, the hook part is located at the top of the supporting part, the connecting piece also includes a clamping part, the clamping part is recessed from the outer periphery of the main body part to the center of the main body part or is a through hole penetrating the main body part, the supporting part passes through the clamping part and cooperates with the main body part through the hook part to connect the stator assembly and the connecting piece.

11. The electric pump according to claim 7, Features: The stator assembly also includes a stator core and an insulating part, the insulating part is injection-molded and fixed to the stator core, the insulating part has a clamping part, the clamping part includes a supporting part and a hook part, the hook part is located at the top of the supporting part, the connecting piece also includes a clamping part, the clamping part is recessed from the outer periphery of the main body part to the center of the main body part or is a through hole penetrating the main body part, the supporting part passes through the clamping part and cooperates with the main body part through the hook part to connect the stator assembly and the connecting piece.

12. The electric pump according to claim 9, Features: The connecting member also includes a limiting column and a reinforcing portion, wherein the reinforcing portion is arranged on the outer periphery of the limiting column, the upper end of the reinforcing portion has an abutting portion, the circuit board has a mounting hole, the limiting column passes through the mounting hole, the circuit board is supported on the abutting portion and the limiting column and the circuit board are riveted together by hot-melt riveting the upper end of the limiting column.

13. The electric pump according to claim 10, Features: The connecting member also includes a limiting column and a reinforcing portion, wherein the reinforcing portion is arranged on the outer periphery of the limiting column, the upper end of the reinforcing portion has an abutting portion, the circuit board has a mounting hole, the limiting column passes through the mounting hole, the circuit board is supported on the abutting portion and the limiting column and the circuit board are riveted together by hot-melt riveting the upper end of the limiting column.

14. The electric pump according to claim 11, Features: The connecting member also includes a limiting column and a reinforcing portion, wherein the reinforcing portion is arranged on the outer periphery of the limiting column, the upper end of the reinforcing portion has an abutting portion, the circuit board has a mounting hole, the limiting column passes through the mounting hole, the circuit board is supported on the abutting portion and the limiting column and the circuit board are riveted together by hot-melt riveting the upper end of the limiting column.

Images