Electronic water pump and vehicle with same

Abstract

The utility model relates to the technical field of water pumps, and discloses an electronic water pump and a vehicle with the electronic water pump, the electronic water pump comprises a pump body, a rotating shaft, a motor assembly and an impeller assembly; the rotor part and the impeller assembly are arranged on the rotating shaft in a sleeving mode, the rotating shaft rotates to drive the rotor part and the impeller assembly to rotate, and therefore negative pressure is formed in the first cavity and the second cavity to suck cooling water in the water tank, and the cooling water enters the second cavity from the water inlet and enters the first cavity from the water circulation inlet under conveying of the impeller assembly. And the cooled water flow flows through the water circulation outlet, flows back to the second cavity and then flows out from the water outlet. According to the electronic water pump, heat generated in the working process of the motor assembly is taken away through flowing of cooling water, so that the heat dissipation efficiency is improved, the reliability and safety of equipment are improved, and the fault risk caused by overheating of the equipment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to an electronic water pump and a vehicle equipped with the electronic water pump. Background Art

[0002] Mine explosion-proof trackless rubber-tyred vehicles operating in complex environments such as mines have strict requirements for the use of electronic water pumps. Traditional electronic water pumps usually are not allowed to be used in mining areas due to potential safety hazards such as electrical sparks.

[0003] Although existing explosion-proof electronic water pumps can meet the safety requirements of mines, the heat dissipation capacity of their internal water circulation systems is limited and difficult to reach the performance standards of traditional water pumps. This problem of insufficient heat dissipation directly affects the normal operation of the vehicle, especially under high-load operating conditions in mines. In the harsh working environment of mines, traditional electronic water pumps are difficult to meet the heat dissipation requirements of explosion-proof trackless rubber-tyred vehicles under high-load conditions, affecting the reliability and safety of the equipment. Summary of the Utility Model

[0004] In view of this, the utility model provides an electronic water pump and a vehicle equipped with the electronic water pump to solve the problem that the poor heat dissipation performance of the electronic water pump in the prior art affects the reliability and safety of the equipment.

[0005] In a first aspect, the utility model provides an electronic water pump, comprising: a pump body, a rotating shaft, a motor assembly and an impeller assembly. An inlet connected to a water tank is provided at the bottom of the pump body. The pump body is successively provided with a first cavity and a second cavity communicating with each other from top to bottom. An outlet is provided on the side wall of the pump body, and the outlet communicates with the second cavity. The rotating shaft is arranged in the pump body and passes through the first cavity and the second cavity. The motor assembly is arranged in the first cavity and includes a stator member fixed on the pump body and a rotor member sleeved on the rotating shaft, and there is a first gap between the stator member and the rotor member. The impeller assembly is arranged in the second cavity and the impeller assembly is sleeved on the rotating shaft. A water circulation inlet and a water circulation outlet are provided between the first cavity and the second cavity. The rotation of the rotating shaft drives the rotation of the rotor member and the impeller assembly to suck the cooling water in the water tank. The cooling water enters from the inlet, and under the pushing action of the impeller assembly and the rotor assembly, successively flows through the first cavity, the water circulation inlet, the first gap and the water circulation outlet, and then returns to the first cavity and flows out from the outlet.

[0006] It has the following advantages:

[0007] The rotor part and the impeller assembly are sleeved on the rotating shaft. The rotating shaft rotates to drive the rotor part and the impeller assembly to rotate, thereby creating a negative pressure in the first cavity and the second cavity to suck the cooling water in the water tank. The cooling water enters the second cavity from the water inlet, and under the conveyance of the impeller assembly, enters the first cavity from the water circulation inlet to cool the rotor. The cooled water flows through the water circulation outlet, returns to the second cavity, and then flows out from the water outlet. This electronic water pump takes away the heat generated by the motor assembly during operation through the flow of the cooling water, thereby improving the heat dissipation efficiency, enhancing the reliability and safety of the equipment, and avoiding the risk of failure caused by overheating of the equipment.

[0008] According to the first aspect embodiment of the present invention, the pump body is further provided with a third cavity, the third cavity is located above the second cavity and is isolated from the second cavity, and a control assembly is provided in the third cavity.

[0009] According to the first aspect embodiment of the present invention, a cable connector is provided at the top of the third cavity. The control assembly includes a PCB main board both provided in the third cavity and an isolated terminal located above the PCB main board. An external cable is threaded through the cable connector, and power is provided to the PCB main board through the isolated terminal.

[0010] According to the first aspect embodiment of the present invention, a cable fixing assembly is provided above the cable connector. The cable fixing assembly includes a fixing sleeve provided inside the cable connector and a compression nut located above the fixing sleeve. A gasket is provided between the fixing sleeve and the compression nut.

[0011] According to the first aspect embodiment of the present invention, the pump body is of a split type. The pump body includes a first housing, a second housing, a third housing, and a fourth housing sequentially arranged from top to bottom. The first housing and the second housing are hermetically connected to enclose and form the third cavity. The second housing and the third housing are hermetically connected to enclose and form the first cavity. The third housing and the fourth housing are hermetically connected to enclose and form the second cavity;

[0012] The water outlet is provided on the side wall of the fourth housing and is communicated with the second cavity. The water inlet is provided at the bottom of the fourth housing to communicate the second cavity and the water tank.

[0013] According to the first aspect embodiment of the present invention, the electronic water pump further includes a water isolation component. The water isolation component is provided in the second cavity and is located in the first gap to be suitable for isolating the stator part and the rotor part.

[0014] According to an embodiment of the first aspect of the present utility model, the water isolation assembly includes a water isolation sleeve, a first sealing structure, and a second sealing structure. The water isolation sleeve is disposed in the first gap. The first end of the water isolation sleeve abuts against the second housing, and the second end of the water isolation sleeve abuts against the third housing. The first sealing structure is located between the second housing and the first end of the water isolation sleeve, and the second sealing structure is located between the third housing and the second end of the water isolation sleeve.

[0015] According to an embodiment of the first aspect of the present utility model, a water circulation inlet and a water circulation outlet are provided at the bottom of the third housing. The impeller assembly includes an impeller member. The impeller member is sleeved on the rotating shaft and rotates with the rotating shaft. The impeller member is provided with a flow-through cavity. Cooling water enters through the water inlet, flows through the flow-through cavity, enters the second cavity, enters the first cavity through the water circulation inlet, flows out through the water circulation outlet, and returns to the second cavity to flow out through the water outlet.

[0016] According to an embodiment of the first aspect of the present utility model, the electronic water pump further includes a rotating shaft connecting member. The rotating shaft connecting member is disposed in the first cavity and is respectively connected to both ends of the rotating shaft. The rotating shaft connecting member is a graphite bearing.

[0017] In a second aspect, the present utility model further provides a vehicle having an electronic water pump, including a vehicle frame and the electronic water pump. The electronic water pump is fixedly disposed on the vehicle frame.

[0018] It has the following advantages: The electronic water pump takes away the heat of the motor assembly through the flow of cooling water, improves the heat dissipation capacity, thereby improving the reliability and safety of the equipment, effectively extending the service life of the vehicle in harsh environments, and reducing the risk of failures caused by overheating of the equipment. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a cross-sectional view of an electronic water pump according to some embodiments of the present utility model.

[0021] Description of the Reference Numerals:

[0022] 1. Pump body; 11. First housing; 12. Second housing; 13. Third housing; 14. Fourth housing; 111. Cable connector; 121. Third cavity; 131. First cavity; 132. First gap; 133. Water circulation inlet; 134. Water circulation outlet; 141. Water inlet; 142. Water outlet; 143. Second cavity; 2. Motor assembly; 21. Stator part; 22. Rotor part; 3. Impeller assembly; 31. Impeller part; 311. Flow-through cavity; 4. Rotating shaft; 5. Control assembly; 51. PCB main board; 52. Isolated terminal; 6. Cable fixing assembly; 61. Compression nut; 62. Gasket; 63. Fixed sleeve; 7. Water isolation assembly; 71. Water isolation sleeve; 72. First sealing structure; 73. Second sealing structure. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] In addition, the technical features involved in the different implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] Refer toFigure 1 As shown in the figure, the first aspect of the present utility model provides an electronic water pump, which includes: a pump body 1, a rotating shaft 4, a motor assembly 2, and an impeller assembly 3. The bottom of the pump body 1 is provided with a water inlet 141 connected to a water tank. The pump body 1 is successively provided with a first cavity 131 and a second cavity 143 that communicate with each other from top to bottom. A water outlet 142 is provided on the side wall of the pump body 1, and the water outlet 142 communicates with the second cavity 143. The rotating shaft 4 is arranged in the pump body 1 and passes through the first cavity 131 and the second cavity 143. The motor assembly 2 is arranged in the first cavity 131 and includes a stator member 21 fixed to the pump body 1 and a rotor member 22 sleeved on the rotating shaft 4. There is a first gap 132 between the stator member 21 and the rotor member 22. The impeller assembly 3 is arranged in the second cavity 143, and the impeller assembly 3 is sleeved on the rotating shaft 4. A water circulation inlet 133 and a water circulation outlet 134 are provided between the first cavity 131 and the second cavity 143. The rotation of the rotating shaft 4 drives the rotation of the rotor member 22 and the impeller assembly 3 to suck the cooling water in the water tank. The cooling water enters from the water inlet 141, and under the pushing action of the impeller assembly 3 and the rotor assembly, it successively flows through the first cavity 131, the water circulation inlet 133, the first gap 132, and the water circulation outlet 134, and then returns to the first cavity 131 and flows out from the water outlet 142.

[0028] Specifically, the rotor member 22 and the impeller assembly 3 are sleeved on the rotating shaft 4. The rotation of the rotating shaft 4 drives the rotation of the rotor member 22 and the impeller assembly 3, thereby forming a negative pressure in the first cavity 131 and the second cavity 143 to suck the cooling water in the water tank. The cooling water enters the second cavity 143 from the water inlet 141, and under the transportation of the impeller assembly 3, it enters the first cavity 131 from the water circulation inlet 133 to cool the rotor. The cooled water flows through the water circulation outlet 134, returns to the second cavity 143, and then flows out from the water outlet. This electronic water pump takes away the heat generated by the motor assembly 2 during operation through the flow of cooling water, thereby improving the heat dissipation efficiency, enhancing the reliability and safety of the equipment, and avoiding the risk of failures caused by overheating of the equipment.

[0029] It can be understood that the traditional heat dissipation of the pump body 1 is achieved by adding air-cooled heat sinks and fans to the pump body 1. However, these methods not only increase the volume and weight of the pump body 1, but also have poor heat dissipation effects and cannot meet the harsh usage environment in mines.

[0030] It should be noted that this electronic water pump includes a pump body 1, a rotating shaft 4, a motor assembly 2, and an impeller assembly 3. Refer to Figure 1, a water inlet 141 connected to the water tank is provided at the bottom of the pump body 1, and the cooling water enters the inside of the pump body 1 through the water inlet 141. Inside the pump body 1, a first cavity 131 and a second cavity 143 that are connected to each other are sequentially arranged from top to bottom. The first cavity 131 is mainly used to accommodate the motor assembly 2, and the second cavity 143 is used to accommodate the impeller assembly 3. When the motor assembly 2 and the impeller assembly 3 rotate with the rotating shaft 4, a negative pressure is formed in the first cavity 131 and the second cavity 143, thereby sucking the cooling water into the first cavity 131 and the second cavity 143. A water outlet 142 is provided on the side wall of the pump body 1, and the water outlet 142 is communicated with the second cavity 143 so that the cooling water can flow out from the water outlet 142 after passing through the impeller assembly 3.

[0031] It can be understood that in the early stage of the rotation of the rotating shaft 4, a negative pressure is formed in the first cavity 131 and the second cavity 143, and the cooling water is sucked into the first cavity 131 and the second cavity 143. In this process, a small amount of cooling water flows out from the water outlet 142 until the first cavity 131 and the second cavity 143 are filled. At this time, the first cavity 131 and the second cavity 143 are kept in a state of being filled with the cooling water. Driven by the rotation of the rotor part 22 and the impeller assembly 3, the cooling water realizes a flow cycle, thereby taking away the heat of the rotor and realizing heat dissipation. When the rotating shaft 4 stops rotating, since the water outlet 142 is provided on the bottom side wall, at this time, under the action of gravity, the cooling water flows out from the water outlet 142 and flows back to the water tank through the water inlet 141, preventing the cooling water from remaining in the first cavity 131 and the second cavity 143 and affecting the service life of the electronic water pump.

[0032] In this electronic water pump, the rotating shaft 4 passes through the first cavity 131 and the second cavity 143. The motor assembly 2 is located in the first cavity 131 and includes a stator part 21 fixed to the pump body 1 and a rotor part 22 sleeved on the rotating shaft 4. A first gap 132 is provided between the rotor part 22 and the stator part 21 to ensure that the rotor part 22 can rotate under the action of electromagnetic force. The impeller assembly 3 is located in the second cavity 143 and is sleeved on the rotating shaft 4. When the motor assembly 2 works, the rotating shaft 4 rotates, and then drives the rotor part 22 and the impeller assembly 3 to rotate synchronously, and uses the rotation of the impeller to suck the cooling water in the water tank into the pump body 1. The cooling water enters the pump body 1 through the water inlet 141, flows through the impeller assembly 3, the first cavity 131, the first gap 132 and the water circulation outlet 134 in sequence, and finally flows out from the water outlet 142.

[0033] In the first aspect embodiment of the present invention, the pump body 1 is further provided with a third cavity 121. The third cavity 121 is located above the second cavity 143 and is arranged in isolation from the second cavity 143. A control assembly 5 is provided in the third cavity 121.

[0034] In the first aspect embodiment of the present utility model, a cable connector 111 is provided at the top of the third cavity 121. The control assembly 5 includes a PCB main board 51 and an insulated terminal block 52 both disposed in the third cavity 121. The external cable passes through the cable connector 111, and power is supplied to the PCB main board 51 through the insulated terminal block 52.

[0035] Specifically, a third cavity 121 is further provided in the pump body 1. The third cavity 121 is located above the second cavity 143. The control assembly 5 is disposed in the third cavity 121. The third cavity 121 is isolated from the second cavity 143 to prevent water vapor from affecting the normal operation of the control assembly 5. To ensure the stability of the control system, a cable connector 111 is provided at the top of the third cavity 121, and an external power cord is connected through this interface. The control assembly 5 includes a PCB main board 51 and an insulated terminal block 52. Power is transmitted to the PCB main board 51 through the insulated terminal block 52 to supply power to the PCB main board 51 and realize the electrical control of the water pump.

[0036] In the first aspect embodiment of the present utility model, a cable fixing assembly 6 is provided above the cable connector 111. The cable fixing assembly 6 includes a fixing sleeve 63 disposed inside the cable connector 111 and a compression nut 61 located above the fixing sleeve 63. A gasket 62 is provided between the fixing sleeve 63 and the compression nut 61.

[0037] A cable fixing assembly 6 is also provided above the cable connector 111. The assembly includes a fixing sleeve 63 and a compression nut 61. The fixing sleeve 63 is disposed inside the cable connector 111, and the compression nut 61 is sealed with the fixing sleeve 63 through a gasket 62, further preventing water vapor from entering the third cavity 121 and enhancing the stability and safety of the electrical connection.

[0038] It can be understood that the fixing sleeve 63 is made of rubber or silicone material, and the inner diameter of the fixing sleeve 63 is smaller than the outer diameter of the cable, thereby ensuring the fixation of the cable and improving the sealing performance of the third cavity 121.

[0039] In the first aspect embodiment of the present utility model, the pump body 1 is of a split type. The pump body 1 includes a first housing 11, a second housing 12, a third housing 13, and a fourth housing 14 arranged in sequence from top to bottom. The first housing 11 and the second housing 12 are hermetically connected to enclose the third cavity 121. The second housing 12 and the third housing 13 are hermetically connected to enclose the first cavity 131. The third housing 13 and the fourth housing 14 are hermetically connected to enclose the second cavity 143;

[0040] The water outlet 142 is provided on the side wall of the fourth housing 14 and communicates with the second cavity 143. The water inlet 141 is provided at the bottom of the fourth housing 14 to communicate the second cavity 143 with the water tank.

[0041] Specifically, the split - type structural design facilitates the disassembly and installation of the pump body 1 for easy maintenance. The first housing 11, the second housing 12, the third housing 13, and the fourth housing 14 are respectively connected by fasteners to ensure the connection firmness, and the adjacent two housings are hermetically connected to ensure the independence of the cavity.

[0042] It can be understood that the pump body 1 is a multi - layer material structure, with an anti - corrosion coating on the outer layer, a pressure - resistant material in the middle layer, and a sealing material in the inner layer, which can effectively improve the protection performance.

[0043] In the first - aspect embodiment of the present utility model, the electronic water pump further includes a water - isolating component 7. The water - isolating component 7 is disposed in the second cavity 143 and is located in the first gap 132 to be adapted to isolate the stator member 21 and the rotor member 22.

[0044] Specifically, the electronic water pump adopts the electromagnetic drive principle. By applying a voltage to the stator member 21, the rotor member 22 is driven to rotate. Therefore, the stator member 21 needs to be in a dry working environment, and the water - isolating component 7 is arranged in the first gap 132 to isolate the stator member 21 and the rotor member 22.

[0045] It can be understood that when the motor assembly 2 operates by the electromagnetic principle, it is the rotor member 22 that drives the rotating shaft 4 to rotate, and then drives the impeller assembly 3 to rotate. When the drive motor is rotationally connected and driven by the drive motor, it is the rotation that drives the rotor member 22 and the impeller assembly 3 to rotate.

[0046] In the first - aspect embodiment of the present utility model, the water - isolating component 7 includes a water - isolating sleeve 71, a first sealing structure 72, and a second sealing structure 73. The water - isolating sleeve 71 is disposed in the first gap 132. The first end of the water - isolating sleeve 71 abuts against the second housing 12, and the second end of the water - isolating sleeve 71 abuts against the third housing 13. The first sealing structure 72 is located between the second housing 12 and the first end of the water - isolating sleeve 71, and the second sealing structure 73 is located between the third housing 13 and the second end of the water - isolating sleeve 71.

[0047] Specifically, the water - isolating component 7 is located in the second cavity 143 and is disposed in the first gap 132 to effectively isolate the water vapor between the stator member 21 and the rotor member 22. The water - isolating component 7 includes a water - isolating sleeve 71, a first sealing structure 72, and a second sealing structure 73. The two ends of the water - isolating sleeve 71 respectively abut against the second housing 12 and the third housing 13. The first sealing structure 72 is located between the water - isolating sleeve 71 and the second housing 12, and the second sealing structure 73 is located between the water - isolating sleeve 71 and the third housing 13. This water - isolating design ensures the safety of the electronic components and the long - term operation of the water pump.

[0048] It can be understood that the water isolation sleeve 71 is made of brass, and both the first sealing structure 72 and the second sealing structure 73 are sealing rings made of rubber or silica gel. Brass has excellent heat conduction performance, so that the high temperature generated during the operation of the stator can be transferred to the cooling water, and heat exchange occurs with the cooling water, thereby reducing the stator temperature and extending the service life. The settings of the first sealing structure 72 and the second sealing structure 73 can avoid water leakage problems caused by excessive gaps due to wear during long-term use.

[0049] In the first aspect embodiment of the present invention, a water circulation inlet 133 and a water circulation outlet 134 are provided at the bottom of the third housing 13. The impeller assembly 3 includes an impeller member 31. The impeller member 31 is sleeved on the rotating shaft 4 and rotates with the rotating shaft 4. The impeller member 31 is provided with a flow-through cavity 311. Cooling water enters through the water inlet 141, flows through the flow-through cavity 311, enters the second cavity 143, enters the first cavity 131 through the water circulation inlet 133, flows out through the water circulation outlet 134, and returns to the second cavity 143 to flow out through the water outlet 142.

[0050] Specifically, through the setting of the flow-through cavity 311, the buffering of the cooling water in the second cavity 143 is realized, thereby ensuring the supply of the cooling water.

[0051] In the first aspect embodiment of the present invention, the electronic water pump further includes a rotating shaft 4 connecting member. The rotating shaft 4 connecting member is arranged in the first cavity 131 and is respectively connected to both ends of the rotating shaft 4. The rotating shaft 4 connecting member is a graphite bearing.

[0052] Specifically, both ends of the rotating shaft 4 are connected by the rotating shaft 4 connecting member. The rotating shaft 4 connecting member is located in the first cavity 131. The rotating shaft 4 connecting member is a graphite bearing. Graphite material has good wear resistance and low friction characteristics, ensuring the smooth rotation of the rotating shaft 4, thereby further improving the overall efficiency and service life of the water pump.

[0053] In the second aspect, the present invention also provides a vehicle with an electronic water pump, including a vehicle frame and the electronic water pump. The electronic water pump is fixedly arranged on the vehicle frame.

[0054] It has the following advantages: The electronic water pump takes away the heat of the motor assembly 2 through the flow of the cooling water, improves the heat dissipation capacity, and further improves the reliability and safety of the equipment, effectively extending the service life of the vehicle in harsh environments and reducing the risk of failures caused by equipment overheating.

[0055] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electronic water pump, characterized in that, Comprising: A pump body (1), the bottom of the pump body (1) is provided with a water inlet (141) connected to a water tank, the pump body (1) is successively provided with a first cavity (131) and a second cavity (143) communicating with each other from top to bottom, the side wall of the pump body (1) is provided with a water outlet (142), and the water outlet (142) communicates with the second cavity (143); A rotating shaft (4), arranged in the pump body (1) and passing through the first cavity (131) and the second cavity (143); A motor assembly (2), arranged in the first cavity (131), including a stator member (21) fixed on the pump body (1) and a rotor member (22) sleeved on the rotating shaft (4), and there is a first gap (132) between the stator member (21) and the rotor member (22); An impeller assembly (3), arranged in the second cavity (143), and the impeller assembly (3) is sleeved on the rotating shaft (4); A water circulation inlet (133) and a water circulation outlet (134) are arranged between the first cavity (131) and the second cavity (143), the rotation of the rotating shaft (4) drives the rotation of the rotor member (22) and the impeller assembly (3) to suck the cooling water in the water tank, the cooling water enters from the water inlet (141), and under the pushing action of the impeller assembly (3) and the rotor assembly, successively flows through the first cavity (131), the water circulation inlet (133), the first gap (132) and the water circulation outlet (134), and then returns to the first cavity (131) and flows out from the water outlet (142).

2. The electric water pump according to claim 1, characterized in that, The pump body (1) is further provided with a third cavity (121), the third cavity (121) is located above the second cavity (143) and is isolated from the second cavity (143), and a control assembly (5) is arranged in the third cavity (121).

3. The electric water pump according to claim 2, characterized in that, The top of the third cavity (121) is provided with a cable connector (111), the control assembly (5) includes a PCB main board (51) and an insulated terminal (52) located above the PCB main board (51), both arranged in the third cavity (121), an external cable passes through the cable connector (111), and the insulated terminal (52) provides power for the PCB main board (51).

4. The electric water pump according to claim 3, characterized in that, Above the cable connector (111) is provided with a cable fixing assembly (6), the cable fixing assembly (6) includes a fixing sleeve (63) arranged inside the cable connector (111) and a compression nut (61) located above the fixing sleeve (63), and a gasket (62) is arranged between the fixing sleeve (63) and the compression nut (61).

5. The electric water pump according to claim 2, wherein, The pump body (1) is of a split type. The pump body (1) includes a first housing (11), a second housing (12), a third housing (13), and a fourth housing (14) arranged in sequence from top to bottom. The first housing (11) and the second housing (12) are hermetically connected to enclose and form the third cavity (121). The second housing (12) and the third housing (13) are hermetically connected to enclose and form the first cavity (131). The third housing (13) and the fourth housing (14) are hermetically connected to enclose and form the second cavity (143). The water outlet (142) is arranged on the side wall of the fourth housing (14) and communicates with the second cavity (143). The water inlet (141) is arranged at the bottom of the fourth housing (14) to communicate the second cavity (143) with the water tank.

6. The electric water pump according to claim 5, characterized in that It further includes a water isolation assembly (7). The water isolation assembly (7) is arranged in the second cavity (143) and is located in the first gap (132) to be suitable for isolating the stator member (21) and the rotor member (22).

7. The electric water pump according to claim 6, wherein The water isolation assembly (7) includes a water isolation sleeve (71), a first sealing structure (72), and a second sealing structure (73). The water isolation sleeve (71) is arranged in the first gap (132). The first end of the water isolation sleeve (71) abuts against the second housing (12), and the second end of the water isolation sleeve (71) abuts against the third housing (13). The first sealing structure (72) is located between the second housing (12) and the first end of the water isolation sleeve (71), and the second sealing structure (73) is located between the third housing (13) and the second end of the water isolation sleeve (71).

8. The electric water pump according to claim 7, wherein, The water circulation inlet (133) and the water circulation outlet (134) are arranged at the bottom of the third housing (13). The impeller assembly (3) includes an impeller member (31). The impeller member (31) is sleeved on the rotating shaft (4) and rotates with the rotating shaft (4). The impeller member (31) is provided with a flow-through cavity (311). Cooling water enters through the water inlet (141), flows through the flow-through cavity (311), enters the second cavity (143), enters the first cavity (131) through the water circulation inlet (133), flows out through the water circulation outlet (134), and returns to the second cavity (143) to flow out through the water outlet (142).

9. The electric water pump according to claim 1, characterized in that It further includes a rotating shaft (4) connecting member. The rotating shaft (4) connecting member is arranged in the first cavity (131) and is respectively connected to both ends of the rotating shaft (4). The rotating shaft (4) connecting member is a graphite bearing.

10. A vehicle with an electric water pump, characterized in that, It includes a vehicle frame and the electric water pump according to any one of claims 1 to 9. The electric water pump is fixedly arranged on the vehicle frame.

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