New energy vehicle motor body and pump body integrated electronic steering pump

Abstract

The 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. A pump body shell is arranged in the middle and lower part of the integrated electronic steering pump shell, and the cylindrical body of the pump body shell is sealingly connected with the lower end surface of the pump body shell to form an integral whole. An oil inlet is arranged below the integrated electronic steering pump shell, and a motor shell is integrally connected above the pump body shell. An oil passage and cavities are in three-phase communication. The uppermost end of the embedded pump is provided with an oil pump front cover, the lowermost end of the embedded pump is provided with an oil pump rear cover, the two ends of the arcuate compression spring plate are clamped into corresponding clamping grooves, the motor body and the pump body are designed as an integral whole, oil enters the integrated electronic steering pump shell through the oil inlet, and then passes through cavities one, two, an oil passage, cavities three, four, five, six and seven to increase use efficiency, and high-pressure oil is filled between the oil pump assembly and the oil pump shell to reduce the noise generated by the new energy vehicle.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle components, and specifically relates to an integrated electronic steering pump for new energy vehicles that combines a motor body and a pump body. Background Technology

[0002] New energy vehicles are now widely used. New energy vehicles need to output large torque at low speeds and when turning. The operation of the steering pump will generate some noise, which will cause noise pollution to the environment and affect the driving experience. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide an integrated electronic steering pump for new energy vehicles that combines the motor body and pump body in a simple structure and reduces noise.

[0004] The technical solution adopted by this invention to solve the technical problem is as follows: An integrated electronic power steering pump for new energy vehicles comprises an integrated electronic power steering pump housing, a front cover for the oil pump, a rear cover for the oil pump, a motor cover, and a motor housing. Its characteristic is that a pump housing is provided in the lower middle part of the integrated electronic power steering pump housing. The lower part of the pump housing is a hollow cylinder. The cylindrical surface of the lower part of the pump housing does not contact the inner wall of the corresponding integrated electronic power steering pump housing on its outer side. A cavity is formed between the cylindrical surface of the lower part of the pump housing and the inner wall of the corresponding integrated electronic power steering pump housing on its outer side. The lowest end of the pump housing has a lower end face, which does not contact the inner wall of the corresponding integrated electronic power steering pump housing below it. A cavity 1 is formed between the lower end face of the pump body housing and the inner wall of the integrated electronic power steering pump housing below it. The cylindrical shape of the pump body housing and the lower end face of the pump body housing are sealed together as a whole. An oil inlet is provided at the bottom of the integrated electronic power steering pump housing, and the oil inlet is connected to cavity 1. The upper part of the pump body housing and the middle part of the integrated electronic power steering pump housing are connected together as a whole. Multiple radial oil passages are arranged in the middle part of the integrated electronic power steering pump housing, and the lower part of the oil passages is connected to cavity 2. A motor housing is integrally connected to the upper part of the pump body housing. A cavity 3 is formed between the upper cylindrical outer wall of the motor housing and the corresponding upper inner wall of the integrated electronic power steering pump housing. The oil passages are connected to cavity 3. This is the low-pressure oil area inside the motor. The motor housing has a horizontal, circular cover at its top, used to enclose the motor. Above the cover, within the integrated electronic steering pump housing, is a controller that connects to electrical and data signals to control the motor's operation. Below the cover, within the motor housing, is cavity four, which is connected to cavity three. Below cavity four, within the motor housing, is the stator assembly, and within the stator assembly is the rotor assembly, which rotates within the stator assembly. The rotor assembly consists of, from the outside in, a rotor permanent magnet, a rotor core, and a rotor shaft. A shaft head magnet is connected to the top of the rotor shaft, and this magnet is attached to the motor cover. Rolling bearings are interference-fitted onto the upper and lower sides of the rotor shaft, with the upper rolling bearing fixed to the upper... On the motor housing, the lower rolling bearing is fixed to the lower motor housing. A cavity five is formed between the stator assembly and the rotor assembly of the motor, and cavity five is connected to cavity four. The lowest end of the rotor shaft is connected to the highest end of the drive gear shaft of the embedded pump via a cross-slider. Rotation of the motor's rotor shaft simultaneously drives the drive gear shaft of the embedded pump to rotate. The uppermost end of the embedded pump has a front cover, and the lowest end has a rear cover. The front and rear covers are sealed to the cylindrical wall of the embedded pump via sealing rings. Two symmetrically arranged locating pins pass through the rear cover, the cylindrical wall of the embedded pump, and the front cover from bottom to top, exiting from the oil suction port end face of the front cover and being fixedly locked in the corresponding locating pin holes at the lowest part of the motor housing.Two symmetrically arranged locating pins are locked in the locating pin holes of the motor housing, locking the embedded pump to the motor housing to prevent the embedded pump from loosening due to rotation of the drive gear shaft inside the embedded pump and the rotor shaft inside the motor. The drive gear shaft passes upward through the front cover of the oil pump inside the embedded pump and is connected to the rotor shaft of the motor via a cross slider. The drive gear shaft rotates inside a bearing, which is fixed on a bearing bracket. The bearing bracket is fixedly connected to the inner wall of the oil pump, ensuring that the drive gear shaft can rotate in a fixed manner. The drive gear shaft has a drive gear, which meshes with a driven gear. The driven gear is fixedly connected to the driven gear shaft. The output end of the driven gear shaft is connected to the load for output. The oil pump suction port is located on the front cover of the embedded pump, and the oil pump suction port connects to the fifth cavity inside the motor. The cover has an oil pump outlet. Oil enters from the oil pump suction port, flows into the oil pump, and then flows out from the oil pump outlet into cavity six. The outer cylindrical surface of the embedded oil pump does not contact the inner wall of its corresponding pump housing, forming cavity seven. Symmetrically, each side of the outer end face of the embedded pump's rear cover has a slot. The two ends of an arched compression spring are fitted into the corresponding slots. The middle arched area of ​​the compression spring elastically presses against the inner wall of the lower end face of the pump housing. Cavity six is ​​formed between the outer wall of the oil pump's rear cover and the inner wall of the lower end face of the pump housing. The oil pump outlet is connected to cavity six, and cavity six is ​​connected to cavity seven. Cavity seven connects to the oil outlet of the integrated electronic power steering pump housing. The electronic power steering pump outlet is located on the integrated electronic power steering pump housing, which also has a return port.

[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 the embedded pump oil port.

[0013] Figure 7 This is a cross-sectional view of the stator assembly of the motor body.

[0014] Figure 8 This is a cross-sectional view of the motor body rotor assembly structure.

[0015] Figure 9 This is a cross-sectional view of the internal structure of the embedded pump assembly.

[0016] Figure 10 This is a structural view of the front and rear covers of the embedded pump.

[0017] Figure 11 This is a cross-sectional view of the internal structure of an electronic power steering pump that integrates the motor and pump body for new energy vehicles.

[0018] Figure 12 This is a structural view of the compression spring sheet.

[0019] Figure 13 This is an enlarged cross-sectional view of the connection between the embedded pump drive gear shaft and the motor rotor shaft via a cross-slider type.

[0020] Figure 14 yes Figure 13 A bottom view.

[0021] Figure 15 yes Figure 13 Top view.

[0022] In the diagram, 1-Cavity 1; 2-Cavity 2; 3-Cavity 3; 4-Cavity 4; 5-Cavity 5; 6-Cavity 6; 7-Cavity 7; 8-Oil passage; 9-Integrated electronic power steering pump housing; 10-Motor housing; 11-Pump housing; 12-Lower end face of pump housing; 13-Controller; 14-Motor cover; 15-Embedded pump; 16-Front cover of oil pump; 16-1-Oil pump suction port; 16-2-End face of oil pump suction port; 17-Rear cover of oil pump; 17-1-Oil pump outlet; 17-2-End face of oil pump outlet; 17-3-Slot; 18-Inner and outer surfaces of the integrated electronic power steering pump housing and pump housing. 19-Low-pressure oil zone inside the motor; 20-High-pressure oil zone between the embedded pump assembly and the pump housing; 21-Oil inlet; 22-Oil outlet; 23-Oil return port; 24-Pressure spring plate; 25-High-pressure oil outlet; 26-Rotor permanent magnet; 27-Rotor core; 28-Rotor shaft; 29-Rolling bearing; 31-Drive gear shaft; 32-Driven gear; 33-Driven gear shaft; 34-Sealing ring; 35-Cross slider; 36-Stator core; 37-Insulating terminal; 38-Enameled wire; 39-Connecting bridge assembly; 40-Shaft magnet; 41-Positioning pin. Detailed Implementation

[0023] Example 1, refer to Appendix Figure 4 , 7 8, 9, 9, 10, 11, 12, 13, 14, 15, The integrated electronic power steering pump for new energy vehicles has an oil inlet 21 on one side of the cylindrical integrated electronic power steering pump housing 9 and an oil return port 23 on the other side of the housing. An oil outlet 22 is provided on the housing in the middle of the integrated electronic power steering pump housing 9. The oil inlet 21 is connected to the oil inlet of the oil tank. The height of the oil tank is higher than that of the integrated electronic power steering pump housing 9. According to the principle of communicating vessels, the oil in the oil tank is guaranteed to flow into the oil inlet 21 due to the oil pressure generated by the height difference. The integrated electronic steering pump housing 9 has a motor housing 10 on its upper part. A motor cover 14, which is horizontal and circular, is located at the top of the motor housing 10. The motor cover 14 encloses the motor below it. A controller 13 is located inside the integrated electronic steering pump housing 9 above the motor cover 14. The controller 13 connects to electrical and data signals to control the motor's operation. The motor cover 14 provides a seal to prevent liquid inside the motor below from flowing into the controller 13, ensuring its proper functioning. A stator assembly is located inside the motor below the motor housing 10. The stator assembly consists of a stator core 36, insulated terminals, enameled wire 38, and a connecting bridge assembly 39. Their connections, positions, and functions are not described in detail here, as they are conventional and long-disclosed known technologies with no novelty and are not the inventive point of this application. A rotor assembly is provided inside the stator assembly. The rotor assembly rotates inside the stator assembly. From the outside to the inside, the rotor assembly consists of a rotor permanent magnet 26, a rotor core 27, and a rotor shaft 28. A shaft head magnet 40 is connected to the top of the rotor shaft 28 of the rotor assembly. The shaft head magnet 40 is fixedly connected to the motor cover 14. Rolling bearings 29 are interference-fitted on the outside of the upper and lower sides of the rotor shaft 28. The upper rolling bearing 29 is fixed to the upper motor housing 10, and the lower rolling bearing 29 is fixed to the lower motor housing 10. The motor housing 10, the pump housing 11 below it, and the integrated electronic steering pump housing 9 are integrally machined. The lower part of the pump housing 11 is a hollow cylinder. The lower cylindrical surface of the pump housing 11 does not contact the corresponding outer side of the integrated electronic steering pump housing 9, forming a cavity. The lowermost end of the pump housing 11 is sealed with a lower end face 12. The sealing function is to ensure that the liquid inside the pump housing 11 does not flow into the cavity inside the corresponding outer side of the integrated electronic steering pump housing 9, which will be described later. Figure 1The pump body is housed in cavities 1 and 2. An embedded pump 15 is installed inside the pump housing 11. The embedded pump 15 does not contact the inner wall of the pump housing 11 or the lower end face 12 of the pump housing, forming a cavity. A front cover 16 is located at the uppermost end of the embedded pump 15, with an oil pump suction port 16-1 on it. The upper end of the front cover 16 is the oil pump suction port end face 16-2, which is sealed to the inner wall of the corresponding pump body. A rear cover 17 is located at the lowermost end of the embedded pump 15, with an oil pump outlet 17-1 on it. The lowermost end face of the rear cover 17 is the oil pump outlet end face 17-2, which faces downwards. A slot 17-3 is symmetrically provided on each side of surface 17-2. The two ends of the arched compression spring plate 24 are plate-shaped and are inserted into the corresponding slot 17-3. The arched area in the middle of the compression spring plate 24 elastically presses against the inner wall of the lower end face 12 of the pump body shell. The arched area in the middle of the compression spring plate 24 and the two ends on both sides form a triangular stability. The two ends on both sides are fixedly inserted into the slot 17-3. The arched area in the middle elastically presses against the inner wall of the lower end face 12 of the pump body shell, and finally forms a stable triangular force balance, so that the compression spring plate 24 forms an effective and stable state, thereby supporting the stable operation of the embedded pump 15 above the compression spring plate 24. The clamping spring plate 24 can achieve elastic deformation, allowing the embedded pump 15 to vibrate effectively within the cavity 6 under the pressure of the clamping spring plate 24. However, this elastic deformation function of the clamping spring plate 24 is within an appropriate range and is not a violent vibration. When the pressure of the clamping spring plate 24 and the pressure of the high-pressure oil in the cavity 6 tend to be balanced, the embedded pump 15 is in a relatively static state. At this time, the noise generated by the embedded pump 15 will be very small. When the oil flows out of the embedded pump 15, this force balance is broken, and the embedded pump 15 will vibrate with the corresponding pressure change of the clamping spring plate 24, thereby generating corresponding noise.The lowest end of the rotor shaft 28 inside the motor is connected to the uppermost end of the drive gear of the embedded pump 15 via a cross slider (please refer to our company's patent application with patent number "2016103358690", which contains the corresponding description, as it is already published content). The rotor shaft 28 of the motor rotates under the control of the controller 13. 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, and emerge from the oil pump front cover suction port end face 16-2. They are fixedly locked in the positioning pin hole at the lowest point of the corresponding motor housing 10. The two symmetrically arranged positioning pins 41 are locked in the positioning pin hole of the motor housing 10, positioning and locking the embedded pump 15 and the motor housing 10 together to prevent the internal pump from being inserted into the motor housing 10. The rotation of the drive gear shaft 30 inside the embedded pump 15 and the rotor shaft 28 inside the motor causes the embedded pump to loosen, ensuring that the drive gear shaft 30 inside the embedded pump 15 rotates smoothly. The drive gear shaft 30 passes upward through the oil pump front cover 16 inside the embedded pump 15 and is connected to the rotor shaft 28 of the motor through a cross slider. The drive gear shaft 30 rotates inside the bearing, and the bearing is fixed on the bearing bracket. The bearing bracket is fixedly connected to the inner wall of the embedded pump 15 to ensure that the drive gear shaft 30 rotates smoothly. The drive gear shaft 30 is provided with a drive gear 31, which meshes with and drives the driven gear 32. The driven gear 32 is fixedly connected to the driven gear shaft 33, which is installed in its corresponding bearing. The output end of the driven gear shaft 33 is connected to the load for output.

[0024] Example 2, see attached document Figure 1 , 23, 4, 5, 6, 10, 12, A pump body shell 11 is integrally connected to the lower middle part of the integrated electronic steering pump housing 9. The lower part of the pump body shell 11 is a hollow cylinder. The lower cylindrical surface of the pump body shell 11 does not contact the inner wall of the integrated electronic steering pump housing 9 on its outer side. A cavity 2 is formed between the lower cylindrical surface of the pump body shell 11 and the inner wall of the integrated electronic steering pump housing 9 on its outer side. The lowermost end of the pump body shell 11 is provided with a lower end face 12. The lower end face 12 of the pump body shell does not contact the inner wall of the integrated electronic steering pump housing 9 below it. A cavity 2 is formed between the lower end face 12 of the pump body shell and the inner wall of the integrated electronic steering pump housing 9 below it. Cavity 1 and the cylindrical shape of the pump housing 11 are sealed together with the lower end face 12 of the pump housing to form a whole. An oil inlet 21 is provided below the integrated electronic power steering pump housing 9, and the oil inlet 21 is connected to cavity 1. Cavity 1 and cavity 2 form the low-pressure oil zone 18 inside and outside the integrated electronic power steering pump housing. The upper part of the pump housing 11 is connected to the middle part of the integrated electronic power steering pump housing 9 as a whole. Four radial oil passages 8 are provided in the middle of the integrated electronic power steering pump housing 9. The lower part of the oil passages 8 communicates with cavity 2. A motor housing 10 is integrally connected to the upper part of the pump housing 11. The oil passages 8 are on the outside of the motor housing 10, and the upper cylindrical outer wall of the motor housing 10 is connected to it. A cavity 3 is formed between the inner walls of the upper part of the integrated electronic power steering pump housing 9 on the outer side. The oil passage 8 is connected to the cavity 3. The uppermost part of the motor housing is provided with a motor cover 14. The motor cover is horizontal and circular and is used to enclose the motor. A controller 13 is provided in the integrated electronic power steering pump housing 9 above the motor cover 14. The controller 13 is connected to electrical signals and data signals to control the operation of the motor. A cavity 4 is provided in the motor body below the motor cover 14. Cavity 4 is connected to cavity 3. The area of ​​cavity 4 and cavity 3 is the low-pressure oil area 19 in the motor. A stator assembly is provided in the motor housing 10 below cavity 4. A rotor assembly is provided in the stator assembly. The rotor assembly rotates in the stator assembly. The rotor assembly is located outside the stator assembly. The rotor assembly consists of a permanent magnet 26, a core 27, and a shaft 28. A head magnet 40 is connected to the top of the rotor shaft 28, which is mounted on the motor cover 14. Rolling bearings are interference-fitted onto the upper and lower sides of the rotor shaft 28. The upper rolling bearing is fixed to the upper motor housing, and the lower rolling bearing is fixed to the lower motor housing. A cavity 5 is formed between the stator assembly and the rotor assembly, and this cavity 5 is connected to a cavity 4. The bottom of the rotor shaft 28 is connected to the top of the drive gear shaft 30 of the embedded pump 15 via a cross-slider. Rotation of the rotor shaft 28 simultaneously drives the drive gear shaft 30 of the embedded pump to rotate. An oil pump front cover 16 is located at the top of the embedded pump 15.The bottom of the embedded pump 15 is provided with a rear cover 17. The front cover 16 and the rear cover 17 are respectively sealed to the cylindrical wall of the pump via sealing rings 34. The drive gear shaft 30 extends upward through the front cover 16 inside the embedded pump 15 and is connected to the rotor shaft 28 of the motor via a cross slider. The drive gear shaft 30 is mounted inside a bearing for rotation. The bearing is fixed on a bearing bracket, which is fixedly connected to the inner wall of the pump to ensure that the drive gear shaft can rotate in a fixed manner. A drive gear 31 is mounted on the drive gear shaft, which meshes with a driven gear 32. The driven gear 32 is fixedly connected to a driven gear shaft 33. The output end of the driven gear shaft 33 is connected to a load for output. An oil pump suction port 16-1 is provided on the front cover 16 of the embedded pump 15, which connects to the cavity 5 inside the motor. An oil pump outlet 17-1 is provided on the rear cover 17 of the embedded pump 15. The outer cylindrical surface of the embedded pump 15 corresponds to the pump... The inner walls of the outer casing 11 do not contact each other and form a cavity 7. The outer end face of the oil pump rear cover 17, which houses the pump, has symmetrical slots 17-3 on both sides. The two ends of the arched compression spring 24 are fitted into the corresponding slots 17-3. The middle arched area of ​​the compression spring 24 elastically presses against the inner wall of the lower end face 12 of the pump casing. A cavity 6 is formed between the outer wall of the oil pump rear cover 17 and the inner wall of the lower end face 12 of the pump casing. The oil pump outlet 17-1 is connected to the cavity... Body 6 is connected to cavity 7, which is also connected to cavity 7. Cavities 6 and 7 together form a high-pressure oil zone 20 between the embedded pump assembly and the pump housing. Cavity 7 connects to the high-pressure oil outlet 25 above the embedded pump 15. The high-pressure oil outlet 25 connects to the oil outlet 22 of the integrated electronic power steering pump housing 9. The electronic power steering pump outlet 22 is located in the middle of the integrated electronic power steering pump housing 9. A return oil port 23 is also provided below the integrated electronic power steering pump housing 9.

[0025] See attached document 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 1As shown, the oil circulation direction is as follows: oil tank → oil inlet 21 → cavity 1 → cavity 2 → oil passage 8 → cavity 3 → cavity 4 → cavity 5 → oil pump suction port 16-1 → embedded pump 15 → oil pump outlet 17-1 → cavity 6 → cavity 7 → high-pressure oil outlet 25 → outlet 22 → oil tank. The oil completes a complete circulation within the integrated electronic steering pump. As mentioned above, the oil flows below the controller 13, providing oil cooling and increasing its efficiency. The oil flows through cavities 3, 4, and 5 within the motor, further cooling the motor and enhancing its heat dissipation capacity, thus increasing its efficiency and lifespan. After the oil flows through the embedded pump 15, the oil becomes high-pressure oil through the operation and pump pressure of the embedded pump 15 and flows out from the oil pump outlet 17-1, entering the cavity 6 and cavity 7. The embedded pump 15 is located in the high-pressure oil zone inside the sealed pump body shell 11 and is completely surrounded by high-pressure oil. The noise generated by the operation of the embedded pump 15 can be reduced by the physical isolation of the oil. According to the parameter comparison of the produced products, the noise can be reduced by 6dB under the same working conditions, which is about 10% of the noise. This can effectively reduce the noise of new energy vehicles at low speeds and when turning, and also improve the driver's driving experience. The embedded pump 15 connects the motor rotor shaft 28 and the drive gear shaft 30 via a cross-slider connection at the top. Two locating pins pass through the pump rear cover 17, the embedded pump 15 cylinder wall, and the pump front cover 16, and are then locked in the corresponding locating pin holes at the lower end of the motor housing 10, effectively preventing the embedded pump from rotating. The rotor shaft 28 drives the drive gear shaft 30 to rotate. The embedded pump 15 is secured at the bottom by an arched clamping spring 24 in a groove 17-3 on the pump outlet end face 17-2. The arched head of the clamping spring 24 presses against the inner wall of the lower end face 12 of the pump body. The entire embedded pump 15 is boltless, as shown in the attached diagram. Figure 5 Because the high-pressure oil outlet is on the oil pump back cover 17, according to Pascal's law "when an incompressible static fluid is subjected to an external force that causes a pressure increase, this pressure increase is transmitted to all points of the static fluid in an instant", since the oil pump outlet 17-1 continuously flows out high-pressure oil, the oil in the cavity 6 will also exert a clamping force on the clamping spring plate 24, which makes the clamping spring plate 24 have a better stabilizing effect on the embedded pump 15.

[0026] Example 3: The processing method for an integrated electric steering pump for new energy vehicles, combining the motor body and pump body, is as follows:

[0027] 1. Stator assembly assembly: The stator is assembled using a 12-slot stator core. The welds are laser welded, and then the stator assembly is machined to ensure its roundness. The stator assembly is pressed into the motor body by heating and expanding it.

[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. Electrical control assembly assembly: After the stator assembly and rotor assembly are assembled, the three-phase positions are sealed with adhesive to ensure that the oil inside the oil-cooled motor does not enter the controller.

[0030] 4. Assembly: The embedded pump assembly is fixed to the integrated pump body by means of positioning pins. A clamping spring is installed at the upper end, and the rear end cover of the oil pump is installed. The clamping spring provides axial force to the embedded pump to achieve fixation.

Claims

1. An integrated electronic power steering pump for new energy vehicles, comprising an integrated electronic power steering pump housing (9) and a motor housing (10), characterized in that, An integrated electronic steering pump housing (9) is integrally connected to a motor housing (10) and a pump housing (11). The motor housing (10) is located in the upper middle part of the integrated electronic steering pump housing (9), and the pump housing (11) is located in the lower middle part of the integrated electronic steering pump housing (9). A low-pressure oil zone (19) is formed in the upper middle part of the motor housing (10) and in the corresponding integrated electronic steering pump housing (9). A cavity five (5) is formed in the motor housing (10). Multiple oil passages (8) are provided on the integrated electronic steering pump housing (9) outside the motor housing (10). An integrated electronic steering pump housing (9) is formed between the pump housing (11) and the corresponding lower integrated electronic steering pump housing (9). The low-pressure oil area (18) is located inside the steering pump housing and outside the pump body housing. The embedded pump (15) is located inside the pump body housing (11). A high-pressure oil area (20) is formed between the embedded pump assembly and the pump body housing (11) between the embedded pump (15) and the pump body housing (11). An oil inlet (21) is provided below the integrated electronic steering pump housing (9). An oil outlet (22) is provided in the middle of the integrated electronic steering pump housing (9). The oil flows in from the oil inlet (21), flows through the low-pressure oil area (18) inside the integrated electronic steering pump housing and outside the pump body housing, the oil passage (8), the low-pressure oil area (19) inside the motor, the cavity five (5), the embedded pump (15), the high-pressure oil area (20) between the embedded pump assembly and the pump body housing, and then flows out from the oil outlet (22).

2. The integrated electronic power steering pump for new energy vehicles, comprising the motor body and pump body as described in claim 1, is characterized in that, A motor cover (14) is connected above the motor housing (10). A controller (13) is installed inside the integrated electronic steering pump housing (9) on the motor cover (14). The controller (13) controls the rotation of the motor.

3. The integrated electronic power steering pump for new energy vehicles, comprising the motor body and pump body as described in claim 1, is characterized in that... The motor housing (10) contains a stator assembly, and the stator assembly contains a rotor assembly. The rotor assembly rotates within the stator assembly. The lower end of the rotor shaft (28) of the rotor assembly is connected to the upper end of the drive gear shaft (30) of the embedded pump (15) via a cross slider (35). The rotation of the rotor shaft (28) of the motor simultaneously drives the drive gear shaft (30) of the embedded pump (15) to rotate.

4. The integrated electronic power steering pump for new energy vehicles, comprising the motor body and pump body as described in claim 3, is characterized in that... The uppermost end of the embedded pump (15) is provided with a front cover (16) and the lowermost end of the embedded pump (15) is provided with a rear cover (17). The front cover (16) and the rear cover (17) are respectively sealed to the cylindrical wall of the embedded pump (15) through sealing rings. Two symmetrically arranged positioning pins (41) pass through the rear cover (17), the cylindrical wall of the embedded pump (15) and the front cover (16) from bottom to top. The positioning pins (41) protrude from the oil pump suction port end face (16-2) of the front cover and are fixedly locked in the positioning pin hole at the bottom of the corresponding motor housing (10). The drive gear shaft (30) is provided with a drive gear (31). The drive gear (31) meshes with the driven gear (32). The driven gear (32) is fixedly connected to the driven gear shaft (33).

5. The integrated electronic power steering pump for new energy vehicles, comprising the motor body and pump body as described in claim 4, is characterized in that... An oil pump suction port (16-1) is provided on the front cover (16) of the embedded pump (15), and the oil pump suction port (16-1) is connected to the cavity five (5) inside the motor. An oil pump outlet port (17-1) is provided on the rear cover (17) of the embedded pump (15). A slot (17-3) is provided on each side of the outer end face of the rear cover (17) of the embedded pump (15). The two ends of the arched compression spring (24) are inserted into the corresponding slot (17-3). The middle arched area of ​​the compression spring (24) is elastically pressed against the inner wall of the lower end face (12) of the pump body shell.

6. The integrated electronic power steering pump for new energy vehicles, comprising the motor body and pump body as described in claim 1, is characterized in that, A shaft head magnet (40) is connected to the top of the rotor shaft (28) of the rotor assembly inside the motor housing (10), and the shaft head magnet (40) is connected to the motor cover (14).

7. The integrated electronic power steering pump for new energy vehicles, comprising the motor body and pump body as described in claim 5, is characterized in that... A pump housing (11) is provided in the lower middle part of the integrated electronic steering pump housing (9). The lower part of the pump housing (11) is a hollow cylinder. The lower cylindrical surface of the pump housing (11) does not contact the inner wall of the integrated electronic steering pump housing (9) corresponding to its outer side. A cavity 2 is formed between the lower cylindrical surface of the pump housing (11) and the inner wall of the integrated electronic steering pump housing (9) corresponding to its outer side. The pump housing (11) has a lower end face (12) at its lowest end. The lower end face (12) of the pump housing does not contact the inner wall of the integrated electronic steering pump housing (9) below it. A cavity 1 (1) is formed between the inner wall of the integrated electronic steering pump housing (9) below it. The cylindrical shape of the pump housing (11) is sealed and connected to the lower end face (12) of the pump housing as a whole. An oil inlet (21) is provided below the integrated electronic steering pump housing (9), and the oil inlet (21) is connected to the cavity 1 (1). The upper part of the pump housing (11) is connected to the middle part of the integrated electronic steering pump housing (9) as a whole. Four radial oil passages (8) are provided in the middle part of the integrated electronic steering pump housing (9). The lower part of the oil passages (8) is connected to the cavity 2 (2). A motor housing is integrally connected to the upper part of the pump housing (11). (10) A cavity three (3) is formed between the upper cylindrical outer wall of the motor housing (10) and the upper inner wall of the integrated electronic steering pump housing (9) corresponding to its outer side. The oil passage (8) is connected to the cavity three (3). A cavity four (4) is provided in the motor body below the motor cover (14). The cavity four (4) is connected to 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 connected to the cavity four (4). An oil pump suction port (16-1) is provided on the oil pump front cover (16) of the embedded pump (15). The oil pump suction port (16-1) is connected to the cavity five (5) in the motor. The oil pump of the embedded pump (15) is connected to the oil pump suction port (16-1). The pump rear cover (17) is provided with an oil pump outlet (17-1). A cavity six (6) is formed between the outer wall of the oil pump rear cover (17) and the inner wall of the lower end face (12) of the pump body shell. The oil pump outlet (17-1) is connected to the cavity six (6). The oil enters from the oil pump suction port (16-1), enters the embedded pump (15), and then flows out from the oil pump outlet (17-1) and flows into the cavity six (6). The outer cylindrical surface of the embedded pump (15) does not contact the inner wall of its corresponding pump body shell (11) and forms a cavity seven (7). The cavity six (6) is connected to the cavity seven (7). The cavity seven (7) is connected to the oil outlet (22) on the integrated electronic steering pump housing (9).

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