An automobile electric power steering device

Abstract

The present invention discloses an electric power steering device for an automobile, which relates to the technical field of automobile mechanical parts and includes a power steering mechanism, a synchronous pumping and exhausting mechanism fixedly provided on the rear side of the power steering mechanism, a sealing and cleaning mechanism fixedly provided on the left end of the synchronous pumping and exhausting mechanism, and a filtering mechanism provided on the top and inside of the sealing and cleaning mechanism. The present invention can significantly improve the circulation efficiency of lubricating oil, thereby increasing the purification frequency of lubricating oil, achieving simultaneous filtration of lubricating oil and discharge of impurities, avoiding the accumulation of impurities that affects the passing efficiency of lubricating oil, and at the same time reducing the difficulty of cleaning the annular filter. In addition, during the impurity discharge process, impurities can be actively cleaned in the horizontal and vertical directions, and the cleaned impurities are separated from the circulating lubricating oil. When the impurities are subsequently discharged, a large amount of lubricating oil will not be lost, thereby avoiding the pollution and waste problems caused by the working environment.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile mechanical parts, in particular to an automobile electric power steering device. Background Art

[0002] The electric power steering is a device used in the automobile steering system. It is part of the automobile steering system and is used to assist the driver in controlling the steering of the vehicle. Its working principle is to provide power assistance through an electric motor to help the driver turn the steering wheel. When the driver turns the steering wheel, the electric power steering will detect information such as the steering angle and vehicle speed, and calculate the required power assistance based on this information. The electric motor will then provide corresponding power assistance to make steering easier.

[0003] After searching, the invention patent with authorization announcement number CN119099713B discloses a gear-type automobile electric power steering device, including a shell, a device shell is provided on the top of the shell; a power shaft is slidably arranged in the shell; an oil box is detachably arranged at the bottom of the shell, and a filter plate for filtering lubricating oil is provided on the inside of the oil box; a circulation mechanism is arranged on one side of the shell, and the circulation mechanism is used to suck the filtered lubricating oil out of the oil box and inject it into the interior of the device shell; a drive motor is arranged on the top of the oil box, the drive motor can drive the power shaft to move in the shell, and the circulation mechanism is driven by the drive motor.

[0004] The technical solution of this application uses an oil box to filter the lubricating oil, and absorbs and presses the lubricating oil through a circulation mechanism to circulate the lubricating oil, thereby achieving the technical effect of cleaning impurities inside the commutator to reduce the impact on the protective performance of the lubricating oil.

[0005] However, during the circulation of the lubricating oil, impurities in the lubricating oil will continue to accumulate on the surface of the filter plate. As the accumulation of impurities continues to increase, accompanied by the suction effect, the impurities will gradually block the filter holes on the filter plate, affecting the passage efficiency of the lubricating oil while increasing the difficulty of subsequent cleaning of the filter plate. In addition, when cleaning the impurities inside the oil box, the oil box needs to be disassembled. However, after the oil box is disassembled, the lubricating oil inside the connecting shell will fall under the action of gravity, and due to structural limitations, it cannot be received, which can easily cause pollution to the working environment and lead to waste of lubricating oil.

[0006] Therefore, it is necessary to invent a kind of automobile electric power steering device to solve the above problems. Summary of the Invention

[0007] The present invention aims to provide an electric power steering system for an automobile, which can significantly improve the efficiency of lubricating oil circulation, thereby increasing the frequency of lubricating oil purification, achieving simultaneous lubricating oil filtration and impurity removal, avoiding impurity accumulation that affects the lubricating oil's flow rate, and reducing the difficulty of cleaning the annular filter. In addition, during the impurity removal process, impurities can be actively cleaned in the horizontal and vertical directions. The cleaned impurities are separated from the circulating lubricating oil. When the impurities are subsequently discharged, a large amount of lubricating oil will not be lost, thereby avoiding the problems of pollution and waste of the working environment caused by this. This solves the problem proposed in the above-mentioned background art that during the lubricating oil circulation process, impurities in the lubricating oil will continue to accumulate on the surface of the filter plate. As the impurity accumulation continues to increase, accompanied by the suction effect, the impurities will gradually clog the filter holes on the filter plate, affecting the flow rate of the lubricating oil and increasing the difficulty of subsequent cleaning of the filter plate. In addition, when cleaning impurities inside the oil box, the oil box needs to be disassembled. However, after the oil box is disassembled, the lubricating oil inside the connecting shell will fall under the action of gravity. Due to structural limitations, it cannot be received, which easily causes pollution of the working environment and waste of lubricating oil.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: an electric power steering device for an automobile, comprising a power steering mechanism, a synchronous pumping and exhausting mechanism fixedly disposed on the rear side of the power steering mechanism, a sealing and cleaning mechanism fixedly disposed on the left end of the synchronous pumping and exhausting mechanism, and a filtering mechanism disposed on the top and inside of the sealing and cleaning mechanism;

[0009] The filtering mechanism includes a sealed shell fixedly arranged on the top of the mounting shell, a connecting pipe B connected to the mounting shell is fixedly provided on the outside of the sealed shell, a rotating shaft B is rotatably nested inside the sealed shell through a bearing, an impeller is fixedly sleeved on the outside of the rotating shaft B, and the impeller rotates and fits inside the sealed shell, a rotating disk is fixedly provided on the top of the rotating shaft B and fits on the top of the first semicircular protrusion, a plurality of second semicircular protrusions are evenly fixed at the bottom edge of the rotating disk, a rotating cylinder is fixedly provided on the bottom end of the rotating shaft B and is rotatably fitted between the two outer sealing plates, a plurality of impurity containing channels are evenly provided on the surface of the rotating cylinder, and an annular filter is fixedly provided on the inside of the rotating cylinder and is rotatably fitted on the outside of the inner sealing plate.

[0010] Preferably, seals are provided between the rotating drum and the mounting shell, between the rotating drum and the outer sealing plate, between the annular filter and the mounting shell, and between the sealing shell and the inner sealing plate.

[0011] Preferably, the power steering mechanism includes a device shell made of carbon fiber reinforced polymer, a mounting plate is fixedly provided in the middle of the front of the device shell, a steering column is slidingly provided in the horizontal direction inside the device shell, and a rack is fixedly provided in the middle of the front of the steering column.

[0012] Preferably, a rotating shaft A is nested and rotatably provided inside the device shell along the vertical direction through a bearing, a gear meshing with a rack is fixedly sleeved on the middle part of the outer side of the rotating shaft A, a worm wheel is fixedly sleeved on the top of the outer side of the rotating shaft A, a worm connected to the worm wheel transmission is nested and rotatably provided through a bearing along the horizontal direction on the top of the inner cavity of the device shell, a drive motor connected to the worm transmission is fixedly provided on the top left side of the device shell, and a controller is connected to the drive motor.

[0013] Preferably, the synchronous pumping mechanism includes a piston housing fixedly arranged on the right side of the back side of the device housing, and a piston plate is slidably fitted in the middle of the inner cavity of the piston housing, and the piston plate divides the inner cavity of the piston housing into a first pumping chamber and a second pumping chamber.

[0014] Preferably, a confluence pipe is provided through both sides of the bottom of the piston housing, the input end of the confluence pipe is connected to the device housing, and the two output ends of the confluence pipe are respectively connected to the first pumping chamber and the second pumping chamber.

[0015] Preferably, a diverter pipe is provided on both sides of the top of the piston housing, the output end of the diverter pipe is connected to the sealed housing, the two input ends of the merging pipe are respectively connected to the first pumping chamber and the second pumping chamber, and a one-way valve is provided on the two output ends of the merging pipe and the two input ends of the diverter pipe.

[0016] Preferably, a piston rod fixedly connected to a piston plate is slidably provided on the right side of the piston housing, and the right end of the piston rod is fixedly connected to a fixed sleeve plate fixedly sleeved on the outside of the steering column.

[0017] Preferably, the sealing and cleaning mechanism includes a mounting shell fixedly arranged on the left side of the piston housing, a sealing door movably connected to the outside of the opening of the mounting shell, a connecting pipe A connected to the device shell is fixedly provided on the rear side of the bottom of the mounting shell, outer sealing plates are fixedly provided on both sides of the inside of the mounting shell, and an inner sealing plate fixedly provided on the bottom of the inner cavity of the mounting shell is provided between the two outer sealing plates.

[0018] Preferably, a guide rod is fixedly provided on the front side of the top of the mounting shell, and a return spring and an L-shaped sliding plate are sequentially sleeved on the outer side of the guide rod from bottom to top, and the L-shaped sliding plate is slidably nested in the middle of the front side of the mounting shell along the vertical direction, and a first semicircular protrusion is fixedly provided on the top of the L-shaped sliding plate and a cleaning brush is fixedly provided on the back side of the L-shaped sliding plate.

[0019] Technical effects and advantages of the present invention:

[0020] The present invention is provided with a synchronous pumping and exhaust mechanism and a filtering mechanism, so that the synchronous suction and output of lubricating oil can be achieved during the left and right movement of the piston plate, which significantly improves the circulation efficiency of the lubricating oil and further increases the purification frequency of the lubricating oil. The movement of the lubricating oil is subsequently used to provide power, thereby achieving synchronous lubricating oil filtration and impurity discharge, avoiding the accumulation of impurities that affect the passing efficiency of the lubricating oil, and at the same time reducing the difficulty of cleaning the annular filter. In addition, during the impurity discharge process, the impurities can be actively cleaned in the horizontal and vertical directions, and the cleaned impurities are separated from the circulating lubricating oil. When the impurities are subsequently discharged, a large amount of lubricating oil will not be lost, thereby avoiding the pollution and waste problems of the working environment caused thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall front-view three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall rear-view stereoscopic structure of the present invention;

[0023] Figure 3 It is a schematic cross-sectional view of the power steering mechanism of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the synchronous pumping and exhausting mechanism of the present invention;

[0025] Figure 5 It is a schematic cross-sectional view of the sealing cleaning mechanism and the filtering mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the expanded structure of the sealing cleaning mechanism and the filtering mechanism of the present invention after cross-section.

[0027] In the figure: 1. Steering power mechanism; 11. Device housing; 12. Mounting plate; 13. Steering column; 14. Rack; 15. Rotating axis A; 16. Gear; 17. Worm gear; 18. Worm; 19. Drive motor; 2. Synchronous pumping and exhaust mechanism; 21. Piston housing; 22. Piston plate; 23. Converging pipe; 24. Diverter pipe; 25. Piston rod; 26. Fixed sleeve; 3. Sealing and cleaning mechanism; 31. Mounting housing; 32. Connecting pipe A; 33. Outer sealing plate; 34. Inner sealing plate; 35. Guide rod; 36. Return spring; 37. L-shaped sliding plate; 38. First semicircular protrusion; 39. Cleaning brush; 4. Filter mechanism; 41. Sealing housing; 42. Connecting pipe B; 43. Rotating axis B; 44. Impeller; 45. Rotating disk; 46. Rotating cylinder; 47. Annular filter. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The present invention provides Figures 1-6 The electric power steering device for an automobile shown in the figure includes a steering assist mechanism 1, a synchronous extraction and exhaust mechanism 2 is fixedly arranged on the rear side of the steering assist mechanism 1, a sealing and cleaning mechanism 3 is fixedly arranged on the left end of the synchronous extraction and exhaust mechanism 2, and a filtering mechanism 4 is commonly arranged on the top and inside of the sealing and cleaning mechanism 3.

[0030] like Figure 3 As shown, the power steering mechanism 1 includes a device housing 11 made of carbon fiber reinforced polymer, a mounting plate 12 is fixedly provided at the middle of the front of the device housing 11, a steering column 13 is slidingly provided in the horizontal direction inside the device housing 11, a rack 14 is fixedly provided at the middle of the front of the steering column 13, a rotating shaft A15 is nested and rotatably provided in the vertical direction through a bearing inside the device housing 11, a gear 16 meshing with the rack 14 is fixedly sleeved at the middle of the outer side of the rotating shaft A15, a worm gear 17 is fixedly sleeved at the top of the outer side of the rotating shaft A15, a worm 18 connected to the worm gear 17 is nested and rotatably provided in the horizontal direction at the top of the inner cavity of the device housing 11 through a bearing, a drive motor 19 connected to the worm gear 18 is fixedly provided at the top of the left side of the device housing 11, and a controller is connected to the drive motor 19.

[0031] By setting up the above structure, the worm 18 can be driven to rotate by the driving motor 19. When the worm 18 rotates, the rotating shaft A15 is driven to rotate through the worm wheel 17. The rotating shaft A15 then drives the gear 16 to rotate. When the gear 16 rotates, it drives the steering column 13 to move left or right through the rack 14 meshing with it, so that the steering column 13 completes the steering power.

[0032] like Figure 4 As shown, the synchronous pumping mechanism 2 includes a piston housing 21 fixedly arranged on the right side of the back side of the device housing 11, and a piston plate 22 is slidably fitted on the middle part of the inner cavity of the piston housing 21. The piston plate 22 divides the inner cavity of the piston housing 21 into a first pumping chamber and a second pumping chamber. A confluence pipe 23 is commonly provided on both sides of the bottom of the piston housing 21. The input end of the confluence pipe 23 is connected to the device housing 11, and the two output ends of the confluence pipe 23 are respectively communicated with the first pumping chamber and the second pumping chamber. A diversion pipe 24 is commonly provided on both sides of the top of the piston housing 21, and the output end of the diversion pipe 24 is connected to the sealing housing 41. The two input ends of the confluence pipe 23 are respectively communicated with the first pumping chamber and the second pumping chamber. A one-way piston rod 25 fixedly connected to the piston plate 22 is slidably provided on the right side of the piston housing 21, and the right end of the piston rod 25 is fixedly connected to a fixed sleeve 26 fixedly sleeved on the outside of the steering column 13.

[0033] By setting the above structure, during the left or right movement of the steering column 13, the piston rod 25 is driven to move left or right synchronously by the fixed sleeve 26 fixedly sleeved on its outside, and the piston rod 25 drives the piston plate 22 to move left or right synchronously inside the piston housing 21. During the left movement of the piston plate 22, due to the restriction of the one-way valves on the merging pipe 23 and the diverter pipe 24, the lubricating oil in the first pumping chamber is discharged through the diverter pipe 24, and the lubricating oil at the bottom of the inner cavity of the device housing 11 is sucked into the second pumping chamber through the merging pipe 23. Similarly, during the right movement of the piston plate 22, the lubricating oil in the second pumping chamber is discharged through the diverter pipe 24, and the lubricating oil at the bottom of the inner cavity of the device housing 11 is sucked into the first pumping chamber through the merging pipe 23. Compared with the existing suction structure, the lubricating oil is discharged while being sucked in, which significantly improves the lubricating oil circulation efficiency and thus increases the lubricating oil purification frequency.

[0034] like Figure 6As shown, the sealing and cleaning mechanism 3 includes a mounting shell 31 fixedly arranged on the left side of the piston housing 21, a sealing door (not shown) is movably connected to the outside of the opening of the mounting shell 31, a connecting pipe A32 connected to the device housing 11 is fixedly provided on the rear side of the bottom of the mounting shell 31, outer sealing plates 33 are fixedly provided on both sides of the inside of the mounting shell 31, an inner sealing plate 34 fixedly provided on the bottom of the inner cavity of the mounting shell 31 is provided between the two outer sealing plates 33, a guide rod 35 is fixedly provided on the front side of the top of the mounting shell 31, and a reset spring 36 and an L-shaped sliding plate 37 are sequentially sleeved on the outside of the guide rod 35 from bottom to top, the L-shaped sliding plate 37 is slidably nested in the middle of the front of the mounting shell 31 along the vertical direction, a first semicircular protrusion 38 is fixedly provided on the top of the L-shaped sliding plate 37 and a cleaning brush 39 is fixedly provided on the back of the L-shaped sliding plate 37.

[0035] By setting the above structure, the rotating disk 45 drives the multiple second semicircular protrusions at its bottom to rotate with the rotating axis B43 as the axis. The multiple second semicircular protrusions successively contact the first semicircular protrusion 38 on the top of the L-shaped sliding plate 37 and then separate, so that the L-shaped sliding plate 37 drives the cleaning brush 39 to descend along the guide rod 35, and then moves up and reset under the push of the reset spring 36. At this time, the cleaning brush 39, driven by the L-shaped sliding plate 37, performs a vertical cleaning operation on the impurities in the impurity holding channel. By performing the cleaning operation in the horizontal direction and the cleaning operation in the vertical direction simultaneously, the cleaning effect can be significantly improved to avoid impurity residue.

[0036] like Figure 6 As shown, the filtering mechanism 4 includes a sealing shell 41 fixedly arranged on the top of the mounting shell 31, a connecting pipe B42 connected to the mounting shell 31 is fixedly provided on the outside of the sealing shell 41, a rotating shaft B43 is provided inside the sealing shell 41 through a bearing, an impeller 44 is fixedly provided on the outside of the rotating shaft B43, and the impeller 44 rotates and fits inside the sealing shell 41. A rotating disk 45 is fixed on the top of the rotating shaft B43 and fits on the top of the first semicircular protrusion 38. The bottom edge of the rotating disk 45 is evenly spaced. A plurality of second semicircular protrusions are fixedly provided, and a rotating cylinder 46 that rotates and fits between the two outer sealing plates 33 is fixedly provided at the bottom end of the rotating shaft B43. A plurality of impurity containing channels are evenly opened on the surface of the rotating cylinder 46. An annular filter screen 47 that rotates and fits on the outer side of the inner sealing plate 34 is fixedly provided on the inner side of the rotating cylinder 46. Seals are provided between the rotating cylinder 46 and the mounting shell 31, between the rotating cylinder 46 and the outer sealing plate 33, between the annular filter screen 47 and the mounting shell 31, and between the sealing shell 41 and the inner sealing plate 34.

[0037] By setting the above-mentioned sealing cleaning mechanism 3 and filtering mechanism 4, when the lubricating oil moves from the inside of the sealing shell 41 to the inside of the connecting pipe B42, the impeller 44 drives the rotating shaft B43 to rotate continuously under the drive of the lubricating oil. When the rotating shaft B43 rotates, it drives the rotating cylinder 46 to rotate between the outer sealing plate 33 and the inner sealing plate 34. The rotation process of the rotating cylinder 46 drives the annular filter 47 to rotate synchronously, thereby continuously switching the filtering position. As the rotating cylinder 46 continues to rotate, the impurity holding channel on the rotating cylinder 46 contacts the cleaning brush 39, and the cleaning brush 39 performs a horizontal cleaning operation on the impurities in the impurity holding channel. In addition, when the rotating shaft B43 rotates, it drives the rotating disk 45 to rotate synchronously. When the rotating disk 45 rotates, it drives multiple second semicircular protrusions at its bottom to rotate with the rotating shaft B43 as the axis.

[0038] In summary, in actual use of the present invention, the worm 18 is driven to rotate by the driving motor 19. When the worm 18 rotates, the worm gear 17 drives the rotating shaft A15 to rotate. The rotating shaft A15 then drives the gear 16 to rotate. When the gear 16 rotates, the rack 14 meshing with the gear 16 drives the steering column 13 to move left or right, so that the steering column 13 completes the steering power.

[0039] During the left or right movement of the steering column 13, the piston rod 25 is driven to move left or right synchronously by the fixed sleeve 26 fixedly sleeved on its outer side, and the piston rod 25 drives the piston plate 22 to move left or right synchronously inside the piston housing 21. During the left movement of the piston plate 22, due to the restriction of the one-way valves on the merging pipe 23 and the diverter pipe 24, the lubricating oil in the first pumping chamber is discharged through the diverter pipe 24, and the lubricating oil at the bottom of the inner cavity of the device housing 11 is sucked into the second pumping chamber through the merging pipe 23. Similarly, during the right movement of the piston plate 22, the lubricating oil in the second pumping chamber is discharged through the diverter pipe 24, and the lubricating oil at the bottom of the inner cavity of the device housing 11 is sucked into the first pumping chamber through the merging pipe 23. Compared with the existing suction structure, the lubricating oil is discharged while being sucked in, which significantly improves the lubricating oil circulation efficiency and thus increases the lubricating oil purification frequency.

[0040] When the lubricating oil is outputted by the shunt pipe 24, it enters the interior of the sealed housing 41 through the shunt pipe 24, then enters the filter chamber formed by the inner wall of the installation housing 31, the two outer sealing plates 33, and the rotating cylinder 46 through the connecting pipe B42. Under the action of pressure, it passes through the impurity receiving channel on the rotating cylinder 46 and then passes through the annular filter 47. The lubricating oil filtered by the annular filter 47 enters the transfer chamber formed by the inner wall of the annular filter 47 and the inner sealing plate 34. Then, under the action of pressure, it flows back to the top of the inner cavity of the device housing 11 through the connecting pipe A32, while impurities remain in the impurity receiving channel on the rotating cylinder 46.

[0041] As the lubricating oil moves from the inside of the sealed housing 41 to the inside of the connecting pipe B42, the impeller 44, driven by the lubricating oil, drives the rotating shaft B43 to rotate continuously. The rotation of the rotating shaft B43 drives the rotating cylinder 46 to rotate between the outer sealing plate 33 and the inner sealing plate 34. The rotation of the rotating cylinder 46 drives the annular filter 47 to rotate synchronously, thereby continuously switching the filtering position. At the same time, impurities in the impurity receiving channel are also driven by the rotation of the rotating cylinder 46 to move toward the cleaning brush 39.

[0042] As the rotating drum 46 continues to rotate, the impurity receiving channel on the rotating drum 46 contacts the cleaning brush 39. Subsequently, as the rotating drum 46 continues to rotate, the cleaning brush 39 performs a horizontal cleaning operation on the impurities in the impurity receiving channel.

[0043] When the rotating shaft B43 rotates, it drives the rotating disk 45 to rotate synchronously. When the rotating disk 45 rotates, it drives multiple second semicircular protrusions at its bottom to rotate with the rotating shaft B43 as the axis. During this process, multiple second semicircular protrusions successively contact and separate from the first semicircular protrusion 38 on the top of the L-shaped sliding plate 37, so that the L-shaped sliding plate 37 drives the cleaning brush 39 to descend along the guide rod 35, and then moves up and resets under the push of the reset spring 36. At this time, the cleaning brush 39, driven by the L-shaped sliding plate 37, performs a vertical cleaning operation on the impurities in the impurity holding channel.

[0044] It should be noted that the cleaning operation in the horizontal direction is performed simultaneously with the cleaning operation in the vertical direction to improve the cleaning effect.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric power steering system for an automobile, comprising a power steering mechanism, characterized in that: A synchronous pumping and exhausting mechanism is fixedly provided on the rear side of the steering assist mechanism, a sealing and cleaning mechanism is fixedly provided on the left end of the synchronous pumping and exhausting mechanism, and a filtering mechanism is provided on the top and inside of the sealing and cleaning mechanism; The sealing cleaning mechanism includes a mounting shell, a first semicircular protrusion and a cleaning brush provided on the mounting shell; The filtering mechanism includes a sealed shell fixedly arranged on the top of the mounting shell, a connecting pipe B connected to the mounting shell is fixedly provided on the outside of the sealed shell, a rotating shaft B is rotatably nested inside the sealed shell through a bearing, an impeller is fixedly sleeved on the outside of the rotating shaft B, and the impeller rotates and fits inside the sealed shell, a rotating disk is fixedly provided on the top of the rotating shaft B and fits on the top of the first semicircular protrusion, a plurality of second semicircular protrusions are evenly fixed on the bottom edge of the rotating disk, and a rotating shaft B is fixedly provided on the bottom end thereof to rotate and fit between the two outer sealing plates. A rotating drum, wherein a plurality of impurity receiving channels are evenly opened on the surface of the rotating drum, an annular filter screen is fixedly provided on the inner side of the rotating drum and is rotatably fitted to the outer side of the inner sealing plate, and the synchronous pumping and exhausting mechanism is driven by the steering power mechanism to transport the lubricating oil to the impeller in the filtering mechanism, and the lubricating oil drives the impeller to rotate and drives the rotating drum and the annular filter screen to rotate, continuously filtering the lubricating oil and switching the filtering position, and the rotation of the rotating drum drives the second semicircular protrusion to contact the first semicircular protrusion to drive the cleaning brush to move in the vertical direction, thereby cleaning the impurities in the impurity receiving channel in the horizontal and vertical directions.

2. The electric power steering device for an automobile according to claim 1, characterized in that: Sealing elements are provided between the rotating cylinder and the mounting shell, between the rotating cylinder and the outer sealing plate, between the annular filter screen and the mounting shell, and between the sealing shell and the inner sealing plate.

3. The electric power steering device for an automobile according to claim 2, characterized in that: The steering assist mechanism includes a device shell made of carbon fiber reinforced polymer, a mounting plate is fixedly provided at the middle of the front of the device shell, a steering column is slidingly provided inside the device shell along the horizontal direction, and a rack is fixedly provided at the middle of the front of the steering column.

4. The electric power steering device for an automobile according to claim 3, characterized in that: A rotating shaft A is nested and arranged inside the device shell in a vertical direction through a bearing for rotation, a gear meshing with a rack is fixedly sleeved on the middle part of the outer side of the rotating shaft A, a worm is fixedly sleeved on the top of the outer side of the rotating shaft A, a worm connected to the worm gear is nested and arranged in a horizontal direction through a bearing for rotation at the top of the inner cavity of the device shell, a drive motor connected to the worm gear is fixedly arranged on the top left side of the device shell, and a controller is connected to the drive motor.

5. The electric power steering device for an automobile according to claim 4, characterized in that: The synchronous pumping mechanism includes a piston housing fixedly arranged on the right side of the back of the device housing, and a piston plate is slidably fitted in the middle of the inner cavity of the piston housing, and the piston plate divides the inner cavity of the piston housing into a first pumping chamber and a second pumping chamber.

6. The electric power steering device for an automobile according to claim 5, characterized in that: A confluence pipe is provided through both sides of the bottom of the piston housing. The input end of the confluence pipe is connected to the device housing, and the two output ends of the confluence pipe are communicated with the first pumping chamber and the second pumping chamber respectively.

7. The electric power steering device for an automobile according to claim 6, characterized in that: A diverter pipe is provided on both sides of the top of the piston housing. The output end of the diverter pipe is connected to the sealed housing. The two input ends of the merging pipe are respectively connected to the first pumping chamber and the second pumping chamber. A one-way valve is provided on both output ends of the merging pipe and both input ends of the diverter pipe.

8. The electric power steering device for an automobile according to claim 7, characterized in that: A piston rod fixedly connected to a piston plate is slidably provided on the right side of the piston housing, and a fixed sleeve plate fixedly sleeved and provided on the outer side of the steering column is fixedly connected to the right end of the piston rod.

9. The electric power steering device for an automobile according to claim 8, characterized in that: A sealing door is movably connected to the outside of the opening of the mounting shell, a connecting pipe A connected to the device shell is fixedly provided on the rear side of the bottom of the mounting shell, outer sealing plates are fixedly provided on both sides of the inside of the mounting shell, and an inner sealing plate fixedly provided on the bottom of the inner cavity of the mounting shell is provided between the two outer sealing plates.

10. The electric power steering device for an automobile according to claim 9, characterized in that: A guide rod is fixedly provided on the front side of the top of the mounting shell, and a return spring and an L-shaped sliding plate are sequentially sleeved on the outer side of the guide rod from bottom to top. The L-shaped sliding plate is slidably nested in the middle of the front side of the mounting shell along the vertical direction, the first semicircular protrusion is fixedly provided on the top of the L-shaped sliding plate, and the cleaning brush is fixedly provided on the back side of the L-shaped sliding plate.

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