Motor body and pump body integrated electronic steering pump for new energy vehicle

Abstract

The invention belongs to the field of parts for new energy vehicles, and particularly relates to a motor body and pump body integrated electronic steering pump for a new energy vehicle. A pump body shell is arranged on the lower middle portion in the integrated electronic steering pump shell, the cylinder of the pump body shell and the lower end face of the pump body shell are connected into a whole in a sealed mode, an oil injection port is formed in the lower portion of the integrated electronic steering pump shell, a motor shell is integrally connected to the upper portion of the pump body shell, and an oil channel is communicated with a third cavity. An oil pump front cover is arranged at the uppermost end of the embedded pump, an oil pump rear cover is arranged at the lowermost end of the embedded pump, the two ends of the arched pressing spring piece are clamped into the corresponding clamping grooves, the motor body and the pump body are designed into a whole, and oil enters from an oil injection opening of the integrated electronic steering pump shell. The oil passes through the cavity I, the cavity II, the oil duct, the cavity III, the cavity IV, the cavity V, the cavity VI and the cavity VII, so that the use efficiency is improved; the space between the oil pump assembly and the oil pump shell is filled with high-pressure oil, and noise generated by the new energy vehicle is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of new energy vehicle parts, and particularly relates to a new energy vehicle motor body and pump body integrated electronic steering pump. BACKGROUND

[0002] New energy vehicles are now widely used by people, and new energy vehicles need to output large torque at low speed and steering, and the working of the steering pump will produce certain noise, which will cause noise pollution to the environment and also affect the driving experience. SUMMARY

[0003] The present application aims to overcome the above technical deficiencies, and provides a new energy vehicle motor body and pump body integrated electronic steering pump with simple structure and reduced noise.

[0004] The application solves the technical problems by adopting the technical scheme that the new energy vehicle motor body and pump body integrated electronic steering pump comprises an integrated electronic steering pump shell, an oil pump front cover, an oil pump rear cover, a motor cover and a motor shell, characterized in that a pump body shell is arranged in the middle and lower part of the integrated electronic steering pump shell, the lower part of the pump body shell is a hollow cylinder, the cylindrical surface of the lower part of the pump body shell is not in contact with the inner wall of the integrated electronic steering pump shell corresponding to the outer side of the cylindrical surface, a cavity two is formed between the cylindrical surface of the lower part of the pump body shell and the inner wall of the integrated electronic steering pump shell corresponding to the outer side of the cylindrical surface, a pump body shell lower end surface is arranged at the lowermost end of the pump body shell, the pump body shell lower end surface is not in contact with the inner wall of the integrated electronic steering pump shell corresponding to the lower side of the pump body shell lower end surface, a cavity one is formed between the pump body shell lower end surface and the inner wall of the integrated electronic steering pump shell corresponding to the lower side of the pump body shell lower end surface, the cylindrical surface of the pump body shell and the pump body shell lower end surface are sealingly connected to form an integral whole, an oil inlet is arranged below the integrated electronic steering pump shell, the oil inlet is in communication with the cavity one, the upper part of the pump body shell is connected to the middle part of the integrated electronic steering pump shell to form an integral whole, a plurality of radial oil channels are arranged in the middle part of the integrated electronic steering pump shell, the lower side of the oil channels is in communication with the cavity two, the motor shell is integrally connected to the upper part of the pump body shell, the outer wall of the upper cylindrical part of the motor shell and the inner wall of the middle and upper part of the integrated electronic steering pump shell corresponding to the outer side of the outer wall form a cavity three, the oil channels are in communication with the cavity three, which is a low-pressure oil area in the motor, the uppermost end of the motor shell is provided with the motor cover, the motor cover is horizontal and circular and is used for packaging the motor, a controller is arranged in the integrated electronic steering pump shell above the motor cover, the controller is connected to electric signals and data signals and controls the operation of the motor, a cavity four is arranged in the motor body below the motor cover, the cavity four is in communication with the cavity three, a stator assembly is arranged in the motor shell below the cavity four, a rotor assembly is arranged in the stator assembly, the rotor assembly rotates in the stator assembly, the rotor assembly comprises, from outside to inside, a rotor permanent magnet, a rotor iron core and a rotor shaft, the uppermost end of the rotor shaft of the rotor assembly is connected to a shaft head magnet, the shaft head magnet is connected to the motor cover, the upper and lower sides of the rotor shaft are both provided with rolling bearings through interference fitting, the upper rolling bearing is fixed to the upper motor shell, the lower rolling bearing is fixed to the lower motor shell, a cavity five is formed between the stator assembly and the rotor assembly of the motor, the cavity five is in communication with the cavity four, the lowermost end of the rotor shaft is connected to the uppermost end of a driving gear shaft of an embedded pump through a cross slider, the rotor shaft of the motor rotates to drive the driving gear shaft of the embedded pump to rotate, the uppermost end of the embedded pump is provided with the oil pump front cover, the lowermost end of the embedded pump is provided with the oil pump rear cover, the oil pump front cover and the oil pump rear cover are sealingly connected to the cylindrical wall of the embedded pump through sealing rings, two symmetrical positioning pins pass through the oil pump rear cover, the cylindrical wall of the embedded pump and the oil pump front cover from bottom to top, and are fixed and locked in the positioning pin holes corresponding to the lowermost part of the motor shell.Two symmetrical positioning pins are locked in the positioning pin holes of the motor shell, so as to position and lock the inner-embedded pump and the motor shell together, prevent the driving gear shaft in the inner-embedded pump and the rotor shaft in the motor from rotating and loosening the inner-embedded pump, the driving gear shaft penetrates out of the oil pump front cover inside the inner-embedded pump and is connected with the rotor shaft of the motor through a cross slider, the driving gear shaft penetrates into a bearing for rotation, the bearing is fixed on a bearing frame, the bearing frame is fixedly connected to the inner wall of the oil pump, so as to ensure that the driving gear shaft can rotate fixedly, the driving gear shaft is provided with a driving gear, the driving gear is engaged with a driven gear, the driven gear is fixedly connected with a driven gear shaft, the output end of the driven gear shaft is connected with a load for output, the oil pump suction port is arranged on the oil pump front cover of the inner-embedded pump, the oil pump suction port is communicated with the cavity five in the motor, the oil pump outlet is arranged on the oil pump rear cover of the inner-embedded pump, oil enters from the oil pump suction port, enters the oil pump, and then flows out from the oil pump outlet, flows into the cavity six, the outer cylindrical surface of the inner-embedded pump does not contact the inner wall of the pump body shell corresponding thereto and forms the cavity seven, the two sides of the outer end surface of the oil pump rear cover of the inner-embedded pump are symmetrically provided with a clamping groove, the two ends of the arched compression spring plate are clamped into the corresponding clamping grooves, the middle arch head area of the compression spring plate is elastically pressed against the inner wall of the lower end surface of the pump body shell, the outer wall of the oil pump rear cover and the inner wall of the lower end surface of the pump body shell form the cavity six, the oil pump outlet is communicated with the cavity six, the cavity six is communicated with the cavity seven, the cavity seven is communicated with the oil outlet of the integrated electronic steering pump shell, the electronic steering pump outlet is arranged on the integrated electronic steering pump shell, and the oil return port is also arranged on the integrated electronic steering pump shell.

[0005] The beneficial effects of this invention are as follows: The integrated electronic power steering pump for new energy vehicles combines the motor and pump body in a single design and manufacturing process, saving on the original complex processing steps, reducing assembly steps, and minimizing the use of sealing rings. The motor and pump body are designed as a single unit. Oil enters through the oil inlet of the integrated electronic power steering pump housing, passes through chambers one, two, oil passages, three, four, five, six, and seven, and then flows out through the oil outlet of the integrated electronic power steering pump housing. Within the integrated electronic power steering pump housing, the oil flows smoothly through the controller, motor body, and embedded oil pump, circulating smoothly in the oil passages and cavities between them. This fills the motor with oil, changing the cooling system from air-cooled to oil-cooled, increasing the cooling effect of the controller and motor, enhancing heat dissipation capacity, and simultaneously increasing the motor's operating efficiency. The embedded oil pump uses... In the boltless fixing scheme, an elastic compression spring is installed on the rear cover of the oil pump, pressing against the inner wall of the lower end face of the oil pump housing. A cavity seven is formed between the cylindrical wall of the embedded oil pump and the outer oil pump housing, and a cavity six is ​​formed between the rear cover of the oil pump and the lower end face of the oil pump housing. Both cavities seven and six are filled with high-pressure oil pumped from the oil pump outlet. According to Pascal's principle, the high-pressure oil in cavity six provides a clamping force to the compression spring, making the compression spring provide a better fastening effect on the embedded pump. The high-pressure oil areas in cavities seven and six provide better enclosure for the embedded oil pump. After the oil pump is running, the high-pressure oil fills the space between the oil pump assembly and the oil pump housing. Through the physical isolation of the oil, the noise generated by the oil pump is reduced by about 10%, thereby reducing the noise generated by new energy vehicles at low speeds and when turning. Attached Figure Description

[0006] The following description, in conjunction with the accompanying drawings, illustrates specific embodiments.

[0007] Figure 1 This is a cross-sectional schematic diagram of the internal cavity and oil circulation structure of an integrated electric power steering pump for new energy vehicles.

[0008] Figure 2 This is a cross-sectional schematic diagram of the oil circulation inside the embedded oil pump.

[0009] Figure 3 This is a diagram showing the oil pressure distribution area inside the integrated electric power steering pump for new energy vehicles.

[0010] Figure 4 This is a front view of the external structure of an integrated electric steering pump for new energy vehicles, combining the motor and pump bodies.

[0011] Figure 5 This is a schematic diagram of a high-pressure oil-assisted clamping embedded pump.

[0012] Figure 6 This is a schematic diagram of an embedded pump with an outlet.

[0013] Figure 7 is the structure section view of the motor body stator assembly.

[0014] Figure 8 is the structure section view of the motor body rotor assembly.

[0015] Figure 9 is the internal mechanism section view of the in-line pump assembly.

[0016] Figure 10 is the mechanism view of the oil pump front cover and the oil pump rear cover of the in-line pump.

[0017] Figure 11 is the internal structure section view of the new energy vehicle motor body and pump body integrated electronic steering pump.

[0018] Figure 12 is the structure view of the compression spring sheet.

[0019] Figure 13 is the section enlarged view of the cross slide block type connection between the in-line pump driving gear shaft and the motor body rotor shaft.

[0020] Figure 14 is the bottom view of Figure 13 .

[0021] Figure 15 is the top view of Figure 13 .

[0022] In the figure, 1-cavity one; 2-cavity two; 3-cavity three; 4-cavity four; 5-cavity five; 6-cavity six; 7-cavity seven; 8-oil passage; 9-integrated electronic steering pump shell; 10-motor shell; 11-pump body shell; 12-pump body shell lower end face; 13-controller; 14-motor cover; 15-in-line pump; 16-oil pump front cover; 16-1-oil pump oil suction port; 16-2-oil pump oil suction port end face; 17-oil pump rear cover; 17-1-oil pump oil outlet; 17-2-oil pump oil outlet end face; 17-3-clamping groove; 18-low pressure oil area inside the integrated electronic steering pump shell and outside the pump body shell; 19-motor internal low pressure oil area; 20-high pressure oil area between the in-line pump assembly and the pump body shell; 21-oil filling port; 22-oil outlet; 23-oil return port; 24-compression spring sheet; 25-high pressure oil liquid oil outlet; 26-rotor permanent magnet; 27-rotor core; 28-rotor shaft; 29-rolling bearing; 3-driving gear shaft; 31-driving gear; 32-driven gear; 33-driven gear shaft; 34-sealing ring; 35-cross slide block; 36-stator core; 37-insulated terminal; 38-enamelled wire; 39-wiring bridge assembly; 40-shaft head magnet; 41-positioning pin. DETAILED DESCRIPTION

[0023] Example one, refer to the attachedFigure 4 、 7 , 8, 9, 9, 10, 11, 12, 13, 14, 15, the new energy vehicle motor body and pump body integration electronic steering pump, in the lower side of the cylindrical integration electronic steering pump shell 9 on the shell is provided with oil inlet 21, on the other side of the lower shell is provided with oil return port 23, in the middle of the integration electronic steering pump shell 9 on the shell is provided with oil outlet 22, the oil inlet 21 is communicated with the oil tank oil inlet, the height of the oil tank is higher than the integration electronic steering pump shell 9, according to the principle of communication, to ensure that the oil tank oil because of the height difference generated by the oil pressure and flow into the oil inlet 21. The upper part of the integration electronic steering pump shell 9 is provided with motor shell 10, the upper end of the motor shell 10 is provided with motor cover 14, the motor cover 14 is horizontal, circular, the motor cover 14 is used for packaging the motor below, the controller 13 is arranged in the upper part of the motor cover 14 in the integration electronic steering pump shell 9, the controller 13 is connected with electric signal and data signal, controls the operation of the motor, the motor cover 14 is sealed, to ensure that the liquid in the motor below the motor cover 14 does not flow into the controller 13, to ensure the good work of the controller 13. The stator assembly is arranged in the motor below the motor shell 10, the stator assembly is composed of stator core 36, insulation terminal, enameled wire 38 and wiring bridge assembly 39, which will not be described in detail here, the connection, position relationship and function are all conventional, which has been disclosed for a long time, and there is no novelty, which is not the invention point of the application. The rotor assembly is arranged in the stator assembly, the rotor assembly rotates in the stator assembly, the rotor assembly is composed of rotor permanent magnet 26, rotor core 27 and rotor shaft 28 from outside to inside, the uppermost of the rotor shaft 28 of the rotor assembly is connected with shaft head magnet 40, the shaft head magnet 40 is fixedly connected on the motor cover 14, the outer part of the upper and lower sides of the rotor shaft 28 is provided with rolling bearing 29, the upper rolling bearing 29 is fixed on the upper motor shell 14, and the lower rolling bearing 29 is fixed on the lower motor shell 14. The motor shell 14 is integrally processed with the pump body shell 11 below and the integration electronic steering pump shell 9, the lower part of the pump body shell 11 is hollow cylindrical, the lower cylindrical surface of the pump body shell 11 and the corresponding integration electronic steering pump shell 9 on the outer side are not in contact, forming a cavity, the lower end of the pump body shell 11 is sealingly connected with the pump body shell lower end surface 12, the sealing effect is to ensure that the liquid in the pump body shell 11 does not flow into the cavity in the corresponding shell body outside the integration electronic steering pump shell 9, that is, the Figure 1The cavity one 1 and the cavity two 2 are formed in the pump body shell 11. The inner-embedded pump 15 is arranged in the pump body shell 11 and is not in contact with the inner wall of the pump body shell 11 and the lower end surface 12 of the pump body shell, so as to form a cavity. The uppermost end of the inner-embedded pump 15 is provided with an oil pump front cover 16. The oil pump front cover 16 is provided with an oil pump oil suction port 16-1. The upper end of the oil pump front cover 16 is an oil pump oil suction port end surface 16-2. The oil pump oil suction port end surface 16-2 is in sealing connection with the corresponding inner wall of the pump body shell. The lowermost end of the inner-embedded pump 15 is provided with an oil pump rear cover 17. The oil pump rear cover 17 is provided with an oil pump oil outlet 17-1. The lowermost end of the oil pump rear cover 17 is an oil pump rear cover oil outlet end surface 17-2. The oil pump rear cover oil outlet end surface 17-2 faces downward. The two ends of the arched compression spring sheet 24 are sheet-shaped and are clamped into the corresponding clamping grooves 17-3. The middle arch head region of the compression spring sheet 24 is elastically pressed against the inner wall of the lower end surface 12 of the pump body shell. The middle arch head region and the two ends of the compression spring sheet 24 form a triangle. The two ends are clamped into the clamping grooves 17-3. The middle arch head region is elastically pressed against the inner wall of the lower end surface 12 of the pump body shell. Finally, a stable triangular force balance is formed, so that the compression spring sheet 24 forms an effective and stable state, thereby supporting the stable operation of the inner-embedded pump 15 above the compression spring sheet 24. The compression spring sheet 24 can realize elastic deformation, so that the inner-embedded pump 15 effectively vibrates in the cavity six 6 under the pressing action of the compression spring sheet 24. However, the elastic deformation function of the compression spring sheet 24 is within a proper range and is not a violent vibration. When the pressing force of the compression spring sheet 24 and the oil pressure of the high-pressure oil in the cavity six 6 tend to be balanced, the inner-embedded pump 15 is in a relatively static state. At this time, the noise generated by the inner-embedded pump 15 is very small. When the oil flows out of the inner-embedded pump 15, the balance of force is broken, and the inner-embedded pump 15 will vibrate with the corresponding change of the pressure received by the compression spring sheet 24, thereby generating corresponding noise.The lowermost end of the rotor shaft 28 in the motor is connected to the uppermost end of the driving gear 30 of the in-line pump 15 through a cross slider (for details, please refer to the patent application with the patent number "2016103358690" of our company, which is introduced in the corresponding part and belongs to the published content). The rotor shaft 28 of the motor rotates under the control of the controller 13. The two symmetrically arranged positioning pins 41 pass through the oil pump rear cover 17, the cylindrical wall of the in-line pump 15 and the oil pump front cover 16 from bottom to top, and then pass out from the oil pump front cover oil suction end surface 16-2. The two symmetrically arranged positioning pins 41 are fixed and locked in the corresponding positioning pin holes arranged at the lowermost part of the motor housing 10. The two symmetrically arranged positioning pins 41 are locked in the positioning pin holes of the motor housing 10, so as to position and lock the in-line pump 15 and the motor housing 10 together. This prevents the driving gear shaft 30 in the in-line pump 15 and the rotor shaft 28 in the motor from rotating and causing the in-line pump to loosen. This ensures the smooth rotation of the driving gear shaft 30 in the in-line pump 15. The driving gear shaft 30 passes out of the oil pump front cover 16 and is connected to the rotor shaft 28 of the motor through a cross slider. The driving gear shaft 30 is rotatably arranged in the bearing, which is fixed on the bearing bracket. The bearing bracket is fixedly connected to the inner wall of the in-line pump 15, so as to ensure the smooth rotation of the driving gear shaft 30. The driving gear shaft 30 is provided with a driving gear 31, which is in meshing transmission connection with a driven gear 32. The driven gear 32 is fixedly connected to a driven gear shaft 33. The driven gear shaft 33 is rotatably arranged in the corresponding bearing. The output end of the driven gear shaft 33 is connected to the load for output.

[0024] Example two, refer to the attached Figure 1 、 2, 3, 4, 5, 6, 10, 12, the lower part of the integrated electronic steering pump shell 9 is integrally connected with the pump body shell 11, the lower part of the pump body shell 11 is a hollow cylinder, the cylindrical surface of the lower part of the pump body shell 11 is not in contact with the inner wall of the upper part of the integrated electronic steering pump shell 9 corresponding to the outer side, a cavity two 2 is formed between the cylindrical surface of the lower part of the pump body shell 11 and the inner wall of the upper part of the integrated electronic steering pump shell 9 corresponding to the outer side, the lower end of the pump body shell 11 is provided with a pump body shell lower end surface 12, the pump body shell lower end surface 12 is not in contact with the inner wall of the lower part of the integrated electronic steering pump shell 9 corresponding to the lower end surface, a cavity one 1 is formed between the pump body shell lower end surface 12 and the inner wall of the lower part of the integrated electronic steering pump shell 9 corresponding to the lower end surface, the cylindrical shape of the pump body shell 11 is sealingly connected with the pump body shell lower end surface 12 to form an integral whole, an oil inlet 21 is arranged below the integrated electronic steering pump shell 9, the oil inlet 21 is in communication with the cavity one 1, the cavity one 1 and the cavity two 2 are low-pressure oil areas in the integrated electronic steering pump shell and outside the pump body shell, the upper part of the pump body shell 11 is integrally connected with the middle part of the integrated electronic steering pump shell 9, four radial oil channels 8 are arranged in the middle part of the integrated electronic steering pump shell 9, the lower part of the oil channel 8 is in communication with the cavity two 2, the upper part of the pump body shell 11 is integrally connected with the motor shell 10, the oil channel 8 is outside the motor shell 10, a cavity three 3 is formed between the upper part of the motor shell 10 and the inner wall of the upper part of the integrated electronic steering pump shell 9 corresponding to the outer side of the upper part of the motor shell 10, the oil channel 8 is in communication with the cavity three 3, the uppermost end of the motor shell is provided with a motor cover 14, the motor cover is horizontal and circular, and is used for packaging the motor, a controller 13 is arranged above the motor cover 14 in the integrated electronic steering pump shell 9, the controller 13 is connected with electric signals and data signals, and controls the operation of the motor, a cavity four 4 is arranged in the motor body below the motor cover 14, the cavity four 4 is in communication with the cavity three 3, the area of the cavity four 4 and the cavity three 3 is a low-pressure oil area in the motor, a stator assembly is arranged in the motor shell 10 below the cavity four 4, a rotor assembly is arranged in the stator assembly, the rotor assembly rotates in the stator assembly, the rotor assembly comprises a rotor permanent magnet 26, a rotor iron core 27 and a rotor shaft 28 from outside to inside, the uppermost end of the rotor shaft 28 of the rotor assembly is connected with a shaft head magnet 40, the shaft head magnet 40 is connected with the motor cover 14, the upper and lower sides of the rotor shaft 28 are both provided with rolling bearings in an interference fit, the upper rolling bearing is fixed on the upper motor shell, the lower rolling bearing is fixed on the lower motor shell, a cavity five 5 is formed between the stator assembly and the rotor assembly of the motor, the cavity five 5 is in communication with the cavity four 4, the lowermost end of the rotor shaft 28 is connected with the uppermost end of a driving gear shaft 30 of an inlaid pump 15 through a cross slider, the rotor shaft 28 of the motor rotates to drive the driving gear shaft 30 of the inlaid pump to rotate, the uppermost end of the inlaid pump 15 is provided with an oil pump front cover 16,The lowermost end of the inlaid pump 15 is provided with an oil pump rear cover 17, and the oil pump front cover 16 and the oil pump rear cover 17 are respectively sealed and connected with the cylindrical wall of the oil pump through a sealing ring 34. The driving gear shaft 30 penetrates the oil pump front cover 16 upward in the inlaid pump 15 and is connected with the rotor shaft 28 of the motor through a cross slider. The driving gear shaft 30 penetrates and rotates in a bearing, and the bearing is fixed on a bearing frame which is fixedly connected with the inner wall of the oil pump, so as to ensure that the driving gear shaft can rotate fixedly. The driving gear shaft is provided with a driving gear 31 which is engaged with a driven gear 32. The driven gear 32 is fixedly connected with a driven gear shaft 33, and the output end of the driven gear shaft 33 is connected with a load for output. The oil pump front cover 16 of the inlaid pump 15 is provided with an oil pump oil suction port 16-1 which communicates with the cavity five 5 in the motor. The oil pump rear cover 17 of the inlaid pump 15 is provided with an oil pump oil outlet 17-1. The outer cylindrical surface of the inlaid pump 15 does not contact the inner wall of the pump body shell 11 corresponding thereto and forms a cavity seven 7. The outer end surface of the oil pump rear cover 17 of the inlaid pump is symmetrically provided with a clamping groove 17-3 on both sides. The two ends of the arched compression spring sheet 24 are clamped into the corresponding clamping grooves 17-3. The middle arch head area of the compression spring sheet 24 is elastically pressed against the inner wall of the lower end surface 12 of the pump body shell. The outer wall of the oil pump rear cover 17 and the inner wall of the lower end surface 12 of the pump body shell form a cavity six 6. The oil pump oil outlet 17-1 communicates with the cavity six 6. The cavity six 6 communicates with the cavity seven 7. The cavity six 6 and the cavity seven 7 form a high-pressure oil area 20 between the inlaid pump assembly and the pump body shell as a whole. The cavity seven 7 communicates with the high-pressure oil outlet 25 above the inlaid pump 15. The high-pressure oil outlet 25 communicates with the oil outlet 22 of the integrated electronic steering pump shell 9. The electronic steering pump oil outlet 22 is arranged at the middle position of the integrated electronic steering pump shell 9. The integrated electronic steering pump shell 9 is further provided with an oil return port 23 below.

[0025] Referring to the drawings Figure 1 , 3Sections 4 and 6 describe the oil circulation process within the integrated electronic power steering pump (EMP) housing 9 for new energy vehicles. First, an oil inlet 21 is located at the bottom of the integrated EEP pump housing 9. Due to the principle of communicating vessels, the height of the oil tank is higher than that of the integrated EEP pump housing 9. The oil tank's outlet connects to the oil inlet 21 at the bottom of the integrated EEP pump housing 9. Due to the height difference, a pressure difference is created in the oil. At this time, the oil output from the oil tank is at a relatively high pressure relative to the oil entering through the oil inlet 21 at the bottom of the integrated EEP pump housing 9. The oil flows into the lower part of the integrated EEP pump housing 9, into the low-pressure oil zone 18 between the integrated EEP pump housing and the pump body outer shell. This is the low-pressure zone for the oil. The oil then continues to flow into the integrated EEP pump housing... When the oil is injected into the motor housing 9, due to the principle of communicating vessels, as the oil increases, it overflows upwards into the four radial oil channels 8 opened in the middle of the integrated electronic steering pump housing 9 outside the motor housing 10. As the oil continues to increase, due to the pressure difference caused by the height difference, the oil continues to flow upwards into the low-pressure oil area 19 inside the motor. This area is also a low-pressure oil area. Then, due to gravity, it flows downwards into the motor body, filling the motor body. Since the motor cover 14 is sealed, the oil will not enter the controller 13 above the motor cover 14, ensuring the normal operation of the controller 13. At this time, the oil flows below the controller 13, which plays a role in liquid cooling of the controller 13. Appropriate cooling of the controller can maintain the stability of the controller's operation and extend its service life. The cavity 5 inside the motor body is connected to the oil pump suction port 16-1 on the oil pump front cover 16 above the embedded pump 15. Oil is drawn into the embedded pump 15 through the oil pump suction port 16-1. Due to the operation of the embedded pump 15, the embedded pump 15 pressurizes the oil and it flows out from the oil pump outlet 17-1 on the oil pump rear cover 17. At this time, the oil, pressurized by the operation of the embedded pump 15, enters the high-pressure oil zone 20 between the embedded pump assembly and the pump body housing. The oil at this time is the high-pressure oil formed after the embedded pump operates and pressurizes. This high-pressure oil then passes through the space between the embedded pump assembly and the pump body housing. After passing through the high-pressure oil zone 20, the fluid enters its connected high-pressure oil outlet 25. The high-pressure oil outlet 25 connects to the oil outlet 22 in the middle of the integrated electronic power steering pump housing 9, and then returns to the oil tank. Although the height of the oil tank is higher than the height of the integrated electronic power steering pump housing 9, the fluid flowing out of the outlet 22 is high-pressure, while the oil in the tank is relatively low-pressure. Therefore, the high-pressure fluid flowing out of the outlet 22 can rise into the relatively low-pressure oil tank due to the hydraulic pressure difference. In the oil tank, the high-pressure and low-pressure fluids mix, reforming into low-pressure fluid, thus completing the circulation. (See attached diagram) Figure 1The circulation flow direction of the oil liquid is shown as follows: oil tank → oil inlet port 21 → cavity one 1 → cavity two 2 → oil passage 8 → cavity three 3 → cavity four 4 → cavity five 5 → oil pump oil suction port 16-1 → embedded pump 15 → oil pump oil outlet port 17-1 → cavity six 6 → cavity seven 7 → high-pressure oil liquid outlet port 25 → oil outlet port 22 → oil tank. The oil liquid completes circulation in the entire integrated electronic steering pump, and the oil liquid flows through the controller 13, which plays a role of oil cooling for the controller 13 and increases the use efficiency of the controller 13. The oil liquid flows through the cavities three 3, four 4 and five 5 in the motor, plays a role of oil cooling for the motor, increases the cooling performance of the motor, enhances the heat dissipation capacity of the motor, and increases the use efficiency and service life of the motor. After the oil liquid flows through the embedded pump 15, the oil liquid becomes high-pressure oil liquid through the work and pump pressure of the embedded pump 15 and flows out from the oil pump oil outlet port 17-1 into the cavities six 6 and seven 7. The embedded pump 15 is in the high-pressure oil area in the closed pump body shell 11 and is completely wrapped by the high-pressure oil liquid. The noise generated by the work of the embedded pump 15 can be reduced by the physical isolation of the oil liquid. Through comparison of the parameters of the produced products, the noise can be reduced by 6 dB under the same working condition, the noise is reduced by about 10%, the new energy vehicle in the low-speed and steering state can effectively reduce the noise, and the driving experience of the driver is improved. The rotor shaft 28 of the motor is connected to the driving gear shaft 30 through the cross slider connection mode above the embedded pump 15. The two positioning pins are fitted through the oil pump rear cover 17, the embedded pump 15 barrel wall and the oil pump front cover 16, and then locked in the corresponding positioning pin holes at the lower end of the motor shell 10, effectively preventing the rotation of the embedded pump. The rotor shaft 28 drives the driving gear shaft 30 to rotate. The arch-shaped compression spring plate 24 at the lower end of the embedded pump 15 is clamped in the clamping groove 17-3 on the oil pump oil outlet end surface 17-2. The arch head of the arch-shaped compression spring plate 24 is pressed against the inner wall of the lower end surface 12 of the pump body shell. The entire embedded pump 15 adopts a bolt-free fixing mode, and the specific structure is shown in the attached drawings. Figure 5 Because the high-pressure oil outlet port is on the oil pump rear cover 17, according to Pascal's law "the pressure increase of a point in an incompressible static fluid caused by external force is transmitted to all points in the static fluid at the same time", the oil in the cavity six 6 will also generate a compression force on the compression spring plate 24 due to the continuous flow of high-pressure oil out of the oil pump oil outlet port 17-1, so that the compression spring plate 24 generates a better stable effect on the embedded pump 15.

[0026] Example three, the processing mode of the motor body and pump body integrated electronic steering pump for new energy vehicles is as follows:

[0027] 1. Stator assembly: the stator is spliced by adopting a 12-slot stator core combination mode, the weld is treated by laser welding, then the stator assembly is turned to ensure the roundness, and the stator assembly is pressed into the motor body by heating and expanding the motor body.

[0028] 2. Rotor assembly: the rotor shaft is interference-fitted with the rotor core and the ball bearings on both sides, and the bearings are fixed by indenting the motor cover;

[0029] 3. Electronic control assembly: after the stator assembly and the rotor assembly are combined, the three-phase position is sealed by applying glue, which ensures that the oil in the oil-cooled motor does not enter the controller end;

[0030] 4. Assembly: the in-line pump assembly is fixed in the integrated pump body by positioning pins, the upper end is installed with a compression spring plate, and the oil pump rear cover is installed, and the compression spring plate provides axial force to the in-line pump to achieve fixation.

Claims

1. A new energy vehicle motor and pump integrated electronic steering pump, comprising an integrated electronic steering pump shell (9) and a motor shell (10), characterized in that, In the integrated electronic steering pump shell (9), the motor shell (10) and the pump body shell (11) are integrally connected. The motor shell (10) is located in the middle upper part of the integrated electronic steering pump shell (9), and the pump body shell (11) is located in the middle lower part of the integrated electronic steering pump shell (9). A motor inner low pressure oil area (19) is formed in the outer wall of the middle upper part of the motor shell (10) and the corresponding integrated electronic steering pump shell (9). A cavity five (5) is formed in the motor shell (10). A plurality of oil channels (8) are provided on the integrated electronic steering pump shell (9) outside the motor shell (10). An integrated electronic steering pump shell inner and pump body shell outer low pressure oil area (18) is formed between the pump body shell (11) and the corresponding lower part of the integrated electronic steering pump shell (9). An embedded pump (15) is located in the pump body shell (11). An embedded pump assembly and pump body shell high pressure oil area (20) is formed between the embedded pump (15) and the pump body shell (11). An oil inlet (21) is provided below the integrated electronic steering pump shell (9). An oil outlet (22) is provided in the middle of the integrated electronic steering pump shell (9). The oil flows from the oil inlet (21), flows through the integrated electronic steering pump shell inner and pump body shell outer low pressure oil area (18), the oil channel (8), the motor inner low pressure oil area (19), the cavity five (5), the embedded pump (15), and the embedded pump assembly and pump body shell high pressure oil area (20), and then flows out from the oil outlet (22).

2. The new energy vehicle motor and pump integrated electronic steering pump according to claim 1, characterized in that, A motor cover (14) is connected above the motor shell (10). A controller (13) is provided in the integrated electronic steering pump shell (9) above the motor cover (14). The controller (13) controls the rotation of the motor.

3. The new energy vehicle motor and pump integrated electronic steering pump according to claim 1, characterized in that, A stator assembly is provided in the motor shell (10). A rotor assembly is provided in the stator assembly. The rotor assembly rotates in the stator assembly. The lowermost end of the rotor shaft (28) of the rotor assembly is connected to the uppermost end of the driving gear shaft (30) of the embedded pump (15) through a cross slider (35). The rotation of the rotor shaft (28) of the motor drives the rotation of the driving gear shaft (30) of the embedded pump (15).

4. The new energy vehicle motor and pump integrated electronic steering pump according to claim 3, characterized in that, An oil pump front cover (16) is provided at the uppermost end of the embedded pump (15). An oil pump rear cover (17) is provided at the lowermost end of the embedded pump (15). The oil pump front cover (16) and the oil pump rear cover (17) are respectively sealed and connected to the cylindrical wall of the embedded pump (15) through sealing rings. Two symmetrically arranged positioning pins (41) pass through the oil pump rear cover (17), the cylindrical wall of the embedded pump (15) and the oil pump front cover (16) from bottom to top. The positioning pin (41) passes out of the oil pump suction port end surface (16-2) of the oil pump front cover and is fixed and locked in the positioning pin hole arranged at the lowermost part of the corresponding motor shell (10). A driving gear (31) is arranged on the driving gear shaft (30). The driving gear (31) is engaged with a driven gear (32). The driven gear (32) is fixedly connected to a driven gear shaft (33).

5. The new energy vehicle motor and pump integrated electronic steering pump according to claim 4, characterized in that, The oil pump suction port (16-1) is arranged on the oil pump front cover (16) of the embedded pump (15), and the oil pump suction port (16-1) is communicated with the cavity five (5) in the motor, the oil pump outlet (17-1) is arranged on the oil pump rear cover (17) of the embedded pump (15), and the two sides of the outer end surface of the oil pump rear cover (17) of the embedded pump (15) are symmetrically provided with a clamping groove (17-3), the two end heads of the arched compression spring sheet (24) are clamped into the corresponding clamping grooves (17-3), and the middle arch head area of the compression spring sheet (24) is elastically pressed on the inner wall of the lower end surface (12) of the pump body shell.

6. The new energy vehicle motor and pump integrated electronic steering pump according to claim 1, characterized in that, The uppermost of the rotor shaft (28) of the rotor assembly in the motor shell (10) is connected with the shaft head magnet (40), and the shaft head magnet (40) is connected with the motor cover (14).

7. The new energy vehicle motor and pump integrated electronic steering pump according to claim 5, characterized in that, The lower middle part of the integrated electronic steering pump shell (9) is provided with a pump body shell (11), the lower part of the pump body shell (11) is a hollow cylinder, the cylindrical surface of the lower part of the pump body shell (11) is not in contact with the inner wall of the integrated electronic steering pump shell (9) corresponding to the outer side, a cavity two (2) is formed between the cylindrical surface of the lower part of the pump body shell (11) and the inner wall of the integrated electronic steering pump shell (9) corresponding to the outer side, the lowermost end of the pump body shell (11) is provided with a pump body shell lower end face (12), the pump body shell lower end face (12) is not in contact with the inner wall of the integrated electronic steering pump shell (9) below corresponding to the outer side, a cavity one (1) is formed between the pump body shell lower end face (12) and the inner wall of the integrated electronic steering pump shell (9) below corresponding to the outer side, the cylindrical surface of the pump body shell (11) and the pump body shell lower end face (12) are sealingly connected as a whole, an oil inlet (21) is arranged below the integrated electronic steering pump shell (9), the oil inlet (21) is communicated with the cavity one (1), the upper part of the pump body shell (11) is connected with the middle part of the integrated electronic steering pump shell (9) as a whole, four radial oil channels (8) are arranged in the middle part of the integrated electronic steering pump shell (9), the lower part of the oil channel (8) is communicated with the cavity two (2), a motor shell (10) is integrally connected to the upper part of the pump body shell (11), a cavity three (3) is formed between the cylindrical outer wall of the upper part of the motor shell (10) and the inner wall of the upper middle part of the integrated electronic steering pump shell (9) corresponding to the outer side, the oil channel (8) is communicated with the cavity three (3), a cavity four (4) is arranged in the motor body below the motor cover (14), the cavity four (4) is communicated with the cavity three (3), a cavity five (5) is formed between the stator assembly and the rotor assembly of the motor, the cavity five (5) is communicated with the cavity four (4), an oil pump oil inlet (16-1) is arranged on the oil pump front cover (16) of the embedded pump (15), the oil pump oil inlet (16-1) is communicated with the cavity five (5) in the motor, an oil pump oil outlet (17-1) is arranged on the oil pump rear cover (17) of the embedded pump (15), a cavity six (6) is formed between the outer wall of the oil pump rear cover (17) and the inner wall of the pump body shell lower end face (12), the oil pump oil outlet (17-1) is communicated with the cavity six (6), the oil enters from the oil pump oil inlet (16-1), enters the embedded pump (15), and then flows out from the oil pump oil outlet (17-1), flows into the cavity six (6), the outer cylindrical surface of the embedded oil pump is not in contact with the inner wall of the pump body shell (11) corresponding to the outer side, and a cavity seven (7) is formed therebetween, the cavity six (6) is communicated with the cavity seven (7), and the cavity seven (7) is communicated with the oil outlet (22) on the integrated electronic steering pump shell (9).

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