Gear-type automotive electric power steering

Abstract

The present application discloses a gear-type automotive electric power steering device, which belongs to the technical field of automotive steering devices. It includes an outer shell, a device shell is arranged on the top of the outer shell; a power-assisting shaft is slidably arranged in the outer shell; an oil box is detachably arranged at the bottom of the outer shell, and a filter plate for filtering lubricating oil is arranged on the inner side of the oil box; a circulation mechanism is arranged on one side of the outer shell, and the circulation mechanism is used to suck out the filtered lubricating oil in the oil box and inject it into the inner part of the device shell; a driving motor is arranged on the top of the oil box, and the driving motor can drive the power-assisting shaft to move in the outer shell, and the circulation mechanism is driven by the driving motor. The technical solution of the present application adopts an oil box to filter the lubricating oil, and the lubricating oil is sucked and pressed into the lubricating oil through the circulation mechanism, so that the lubricating oil can achieve the effect of circulation, thereby achieving the technical effect of cleaning the impurities inside the commutator to reduce the impact on the protective performance of the lubricating oil.

Description

Technical Field

[0001] The present application relates to the technical field of automobile steering gears, and more specifically, to a gear-type automobile electric power steering gear. Background Art

[0002] The working principle of the gear-type automotive electric power steering is based on the basic structure of the gear rack steering, that is, a pair of intermeshing pinions and racks. When the steering wheel is turned, the pinion in the steering gear rotates, driving the rack in the steering gear to move in the direction of the steering wheel. This movement is transmitted to the steering knuckle arm through the end of the steering gear rack and the end of the steering tie rod, so that the wheel rotates and the steering function of the vehicle is realized; the electric power steering system EPS provides electric assistance for this steering gear, and provides auxiliary torque through the motor. Compared with the traditional hydraulic power steering system, EPS has many advantages, such as high energy efficiency, fast response speed, fewer system components, and easy maintenance. EPS is mainly composed of torque sensor, vehicle speed sensor, motor, reduction mechanism and electronic control unit ECU, which can provide appropriate power according to the driving conditions of the vehicle, thereby reducing the steering burden of the driver.

[0003] In the related art, in order to facilitate the arrangement and installation of the automobile electric power steering device in the automobile chassis space, for example, the patent with the prior art publication number CN218489736U provides a single-gear electric power steering device, which is arranged above the rack shaft through the drive motor. The shell adopts an integral design to reduce the error caused by assembly, reduce the cost and assembly cycle, and make the spatial envelope of the steering gear more compact, which is convenient for arrangement in the automobile chassis space. The sensor unit and the worm gear reduction mechanism are isolated by a plastic partition to avoid mutual influence between the two.

[0004] Although the above-mentioned prior art solution can achieve the effect of convenient arrangement and installation of the steering gear on the automobile chassis through the integral design of the shell, the steering gear will wear out during long-term use, resulting in a gradual increase of impurities inside the shell, causing deposits in the lubricating oil inside the shell, thereby affecting the protective effect of the lubricating oil on the steering gear.

[0005] In view of this, we propose a gear-type automotive electric power steering device. Summary of the invention

[0006] The purpose of this application is to provide a gear-type automotive electric power steering device, which solves the technical problem that the commutator will affect the lubricating oil protection performance due to wear, and achieves the technical effect of cleaning the impurities inside the commutator to reduce the impact on the lubricating oil protection performance.

[0007] The present application provides a gear-type automotive electric power steering device, comprising:

[0008] A housing, wherein a device shell is disposed on the top of the housing;

[0009] A booster shaft, slidably disposed in the housing;

[0010] An oil box is detachably arranged at the bottom of the shell, and a filter plate for filtering lubricating oil is arranged inside the oil box;

[0011] A circulation mechanism is arranged on one side of the housing, and is used to suck out the filtered lubricating oil in the oil box and inject it into the interior of the device housing;

[0012] A driving motor is arranged on the top of the oil box. The driving motor can drive the power-assisting shaft to move in the housing, and the circulation mechanism is driven by the driving motor.

[0013] As an optional solution of the technical solution of this application document, a tooth plate is provided on the outer side of the power-assist shaft, and a tooth column is meshed on one side of the tooth plate; wherein the tooth plate is obliquely provided on the outer side of the power-assist shaft;

[0014] A worm wheel is arranged on the top of the tooth column, a worm is arranged on one side of the worm wheel, and one end of the worm is transmission-arranged on the output shaft of the driving motor;

[0015] The bottom of the tooth column is provided with a stirring rod, and the stirring rod is arranged on the top of the filter plate.

[0016] As an optional solution of the technical solution of this application document, it also includes:

[0017] A bearing ring is arranged in the device housing, one end of the bearing ring is connected to the gear column; a plurality of oil leakage ports are provided on the inner side of the device housing and located outside the bearing ring, and the oil leakage ports are connected to the oil box;

[0018] A transparent tube is connected to the bottom end of the device shell and extends out of the device shell.

[0019] As an optional solution of the technical solution of this application document, the filter plate is obliquely arranged in the oil box to separate a clean oil tank from the oil box;

[0020] A connecting pipe A is provided on the outer side of the oil box, the connecting pipe A is communicated with the clean oil tank, and the connecting pipe A is connected to the circulation mechanism through a connecting piece A.

[0021] As an optional solution of the technical solution of this application document, the circulation mechanism includes:

[0022] A tube body is arranged on one side of the device shell, and a one-way oil outlet valve and a one-way oil inlet valve are arranged on the outer side of the tube body; wherein the one-way oil outlet valve is connected to an oil outlet pipe, and the oil outlet pipe is connected to the shell; the one-way oil inlet valve is connected to an oil inlet pipe, and the oil inlet pipe is connected to the oil box through a connector C;

[0023] The driving mechanism is arranged in the tube body, and the driving mechanism comprises a piston, and the piston can be driven to move in the tube body.

[0024] As an optional solution of the technical solution of this application document, the driving mechanism also includes:

[0025] A reciprocating screw rod is arranged at the output end of the driving motor through a one-way bearing A;

[0026] A threaded moving block, wherein the thread is arranged on the outside of the reciprocating screw rod, and when the reciprocating screw rod rotates, the threaded moving block can move on the outside of the reciprocating screw rod; the threaded moving block is connected to one side of the piston.

[0027] As an optional solution of the technical solution of this application document, the driving mechanism also includes:

[0028] A gear box is arranged at one end of the reciprocating screw rod away from the driving motor.

[0029] Gear B is arranged at one end of the worm through a one-way bearing B. One side of the gear B is meshed with gear A, and the gear A is connected to the input shaft of the gear box.

[0030] As an optional solution of the technical solution of this application document, it also includes a heat dissipation box, which is used to dissipate heat from the circulating lubricating oil;

[0031] Wherein, the oil outlet pipe is connected to the heat dissipation box, and the other end of the heat dissipation box is connected to the device shell through a connecting pipe.

[0032] As an optional solution of the technical solution of this application document, a semiconductor refrigeration sheet is arranged in the heat dissipation box; the hot end of the semiconductor refrigeration sheet is arranged on a side away from the heat dissipation box, and the cold end of the semiconductor refrigeration sheet is arranged on a side close to the heat dissipation box;

[0033] A heat dissipation fin is arranged on the outer side of the semiconductor refrigeration plate, and a cleaning brush is arranged on one end of the reciprocating screw rod close to the heat dissipation fin, and the cleaning brush abuts against the outer side of the heat dissipation fin.

[0034] As an optional solution of the technical solution of the present application document, a torque sensor is arranged on the outer side of the reciprocating screw, and the driving motor responds to the torque sensor.

[0035] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0036] (1) The present application uses an oil box to filter the lubricating oil, and absorbs and presses the lubricating oil through a circulation mechanism to achieve the effect of circulating the lubricating oil, thereby solving the problem that the commutator will be affected by the lubricating oil protection performance due to wear, and further achieves the technical effect of cleaning the impurities inside the commutator to reduce the impact on the lubricating oil protection performance.

[0037] (2) The present application sets a power-assisting shaft inside the shell, and the power-assisting shaft can achieve the basic steering effect of the device under the drive of the driving motor, thereby ensuring the basic use function of the device and the use effect of the device.

[0038] (3) By providing connector A and connector B on the oil box, the present application can facilitate disassembly of the oil box, making it convenient for workers to clean or replace the oil box, thereby improving the comfort level during the use of the equipment and improving the use effect of the equipment.

[0039] (4) The present application sets a heat dissipation mechanism on the top of the circulation mechanism, which can dissipate the heat of the lubricating oil pressed into the circulation mechanism, making it easier to use the lubricating oil, thereby improving the practicability of the equipment and the use effect of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the overall structure of a gear-type automotive electric power steering device disclosed in a preferred embodiment of the present application;

[0041] Figure 2 This is a schematic structural diagram of a housing in a gear-type automotive electric power steering device disclosed in a preferred embodiment of the present application;

[0042] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0043] Figure 4 This is a schematic structural diagram of an assistant shaft in a gear-type automotive electric power steering device disclosed in a preferred embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the structure of the oil box in the gear-type automotive electric power steering device disclosed in a preferred embodiment of the present application;

[0045] Figure 6 This is a structural schematic diagram of a circulation mechanism in a gear-type automotive electric power steering device disclosed in a preferred embodiment of the present application;

[0046] Figure 7This is a schematic diagram of the structure of the driving structure in a gear-type automotive electric power steering device disclosed in a preferred embodiment of the present application;

[0047] Figure 8 The schematic diagram is a structural diagram of a heat dissipation structure in a gear-type automotive electric power steering device disclosed in a preferred embodiment of the present application.

[0048] Explanation of the reference numerals in the figure: 1, housing; 11, device housing; 111, bearing ring; 112, oil leakage port; 113, transparent tube; 12, connecting housing; 13, oil overflow pipe;

[0049] 2. booster shaft; 21. tooth plate; 22. tooth column; 221. stirring rod; 23. worm wheel; 24. worm;

[0050] 3. Oil box; 31. Filter plate; 32. Connecting pipe A; 321. Connecting piece A; 33. Observation window; 34. Connecting piece B;

[0051] 4. Circulation mechanism; 41. Pipe body; 411. One-way oil outlet valve; 4111. Oil outlet pipe; 412. One-way oil inlet valve; 4121. Oil inlet pipe; 4122. Connector C; 42. Driving structure; 421. Piston; 4211. Threaded moving block; 422. Reciprocating screw rod; 4221. Torque sensor; 423. Pulley; 4231. One-way bearing A; 424. Belt; 425. Gear box; 426. Gear A; 427. Gear B; 4271. One-way bearing B;

[0052] 5. Driving motor; 51. Controller;

[0053] 6. Heat dissipation mechanism; 61. Heat dissipation box; 611. Connecting pipe B; 62. Semiconductor cooling sheet; 63. Heat dissipation fins; 64. Cleaning brush. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] Reference below Figure 1-Figure 8 The gear-type automotive electric power steering device and its working principle recorded in the embodiments of the present application are described.

[0056] Reference Figure 1 , Figure 2 and Figure 5The embodiment of the present application discloses a gear-type automotive electric power steering device, including a shell 1, a device shell 11 is arranged on the top of the shell 1, a power-assist shaft 2 is slidably arranged on the inner side of the shell 1, an oil box 3 is detachably arranged on the bottom of the shell 1, a filter plate 31 is obliquely arranged on the inner side of the oil box 3 for filtering lubricating oil, a circulation mechanism 4 is fixedly arranged on the outer side of the shell 1, and is used to suck out the lubricating oil inside the oil box 3 and re-inject it into the inside of the device shell 11, and a driving motor 5 is arranged on the top of the oil box 3 for driving the power-assist shaft 2 to realize the steering function and for driving the circulation mechanism 4 to operate.

[0057] The basic steering function of the equipment can be achieved by driving the power-assist shaft 2 through the driving motor 5, and while driving the power-assist shaft 2, the driving circulation mechanism 4 sucks out the lubricating oil inside the oil box 3 and presses it back into the device shell 11. The lubricating oil lubricates the device inside the equipment and finally falls back into the oil box 3. It is filtered through the filter plate 31 in the oil box 3 and waits for the next absorption by the circulation mechanism 4. The equipment can filter the lubricating oil and realize the circulation flow of the lubricating oil. The technical problem that the commutator will affect the lubricating oil protection performance due to wear is solved, and the technical effect that the impurities inside the commutator can be cleaned to reduce the impact on the lubricating oil protection performance is achieved.

[0058] Reference Figure 1 and Figure 4 A tooth plate 21 is provided on the outer side of the power-assisting shaft 2, and a tooth column 22 is meshed on the outer side of the tooth plate 21. The tooth plate 21 and the tooth column 22 are both inclined. A worm wheel 23 is fixed on the top of the tooth column 22, and a worm 24 is meshed on the outer side of the worm wheel 23. One end of the worm 24 is fixed to the output end of the drive motor 5.

[0059] The driving motor 5 can drive the worm 24 to rotate, and the worm 24 drives the worm wheel 23 to rotate to perform a deceleration process. The worm wheel 23 drives the gear column 22 to rotate, thereby driving the gear plate 21 to move, so that the power-assist shaft 2 can complete the steering effect, thereby ensuring the basic steering function of the equipment.

[0060] Reference Figure 1 , Figure 2 and Figure 3 A bearing ring 111 is disposed on the inner side of the device shell 11 for connecting the gear column 22 . A plurality of oil leakage ports 112 are provided around the bearing ring 111 on the inner side of the device shell 11 . A transparent tube 113 is disposed on the bottom of the device shell 11 .

[0061] The lubricating oil is used to lubricate the structure inside the device shell 11, and then falls into the oil box 3 through multiple oil leaks 112, wherein a small amount of lubricating oil and impurities may remain in the device shell 11. The staff can roughly judge the amount of oil and impurities in the device shell 11 through the transparent tube 113, so that the staff can clean the lubricating oil in the device shell 11 in time.

[0062] Reference Figure 1 , Figure 4 and Figure 5 The oil box 3 also includes a connecting pipe A32, which is fixedly arranged on the outside of the oil box 3. An observation window 33 is fixedly arranged on the outside of the oil box 3, and a stirring rod 221 is fixedly arranged at the bottom of the gear column 22.

[0063] The filter plate 31 and the oil box 3 are arranged at an angle so that a clean oil groove is separated in the oil box 3. The connecting pipe A32 can suck out the lubricating oil in the clean oil groove under the action of the circulation mechanism 4. The observation window 33 can facilitate the staff to observe the sediment inside the oil box 3. The stirring rod 221 can rotate when the gear column 22 is working, driving the lubricating oil inside the oil box 3 to flow, and preventing impurities in the lubricating oil from blocking the top of the filter plate 31.

[0064] In the above technical solution, the gear column 22 is rotatably disposed in the connecting shell 12 , and the bottom end of the connecting shell 12 is connected to the oil box 3 through an oil overflow pipe 13 .

[0065] In a specific embodiment, a sedimentation chamber is provided on one side of the oil box 3, the filter plate 31 is provided on one side of the sedimentation chamber, and the bottom end of the inclined filter plate 31 is higher than the sedimentation chamber, and the oil overflow pipe 13 is provided toward the sedimentation chamber.

[0066] In the above technical solution, the lubricating oil entering the oil box 3 through the oil overflow pipe 13 is not directly injected onto the top of the filter plate 31, so as to avoid some fine impurities directly passing through the filter plate and participating in the circulation again.

[0067] Reference Figure 1 and Figure 5 The four corners of the top of the oil box 3 are fixed to the bottom of the housing 1 through four connecting pieces B34, and the top of the connecting pipe A32 is fixed to the circulation mechanism 4 through a connecting piece A321.

[0068] The four connectors B34 and the connector A321 can facilitate the disassembly of the oil box 3, making it convenient for workers to clean the oil box 3, thereby improving the use effect of the equipment.

[0069] Reference Figure 1 , Figure 6 and Figure 7 The circulation mechanism 4 includes a tube body 41, and a one-way oil outlet valve 411 and a one-way oil inlet valve 412 are arranged on the outer side of the tube body 41. The one-way oil outlet valve 411 transports the lubricating oil to the next process through the oil outlet pipe 4111, and the one-way oil inlet valve 412 absorbs the lubricating oil through the oil inlet pipe 4121, wherein the oil inlet pipe 4121 is fixedly arranged with the connecting piece C4122 and the connecting piece A321, and a driving structure 42 is arranged on the inner side of the tube body 41, and the driving structure 42 includes a piston 421, which is used to drive the tube body 41 to operate.

[0070] The piston 421 drives the tube body 41 to operate, so that the tube body 41 can absorb the lubricating oil in the connecting pipe A32 through the oil inlet pipe 4121 and the one-way oil inlet valve 412, and then, driven by the tube body 41, press the lubricating oil into the outer casing 1 through the one-way oil outlet valve 411 and the oil outlet pipe 4111, thereby completing the circulation effect of the equipment.

[0071] Reference Figure 1 , Figure 6 and Figure 7 The driving structure 42 also includes a threaded moving block 4211, the bottom of the threaded moving block 4211 is fixed to the piston 421, the inner thread of the threaded moving block 4211 is provided with a reciprocating screw 422, and a group of pulleys 423 are provided at one end of the reciprocating screw 422, the inner side of one pulley 423 is fixed to the outer side of the reciprocating screw 422, the inner side of the other pulley 423 is fixed to a driving shaft of the driving motor 5 through a one-way bearing A4231, the inner ring of the one-way bearing A4231 is fixed to the driving shaft of the driving motor 5, the outer ring of the one-way bearing A4231 is fixed to the inner side of the pulley 423, and the outer sides of the two pulleys 423 are meshed with a belt 424.

[0072] While the driving motor 5 drives the power-assisting shaft 2 in the forward direction, the one-way bearing A4231 drives the pulley 423 and the belt 424 to operate, thereby driving the reciprocating screw 422 to rotate, and the reciprocating screw 422 drives the threaded moving block 4211 to move, thereby driving the piston 421 to move, so that the tube body 41 completes the action of absorbing or squeezing out the lubricating oil.

[0073] Reference Figure 6 and Figure 7 The driving structure 42 also includes a gear box 425, a driving shaft of the gear box 425 is fixed to the other end of the reciprocating screw 422, an input shaft of the gear box 425 is fixedly provided with a gear A426, an outer side of the gear A426 is meshed with a gear B427, an inner side of the gear B427 is fixed to one end of the worm 24 through a one-way bearing B4271, wherein the inner ring of the one-way bearing B4271 is fixed to the outer side of the worm 24, and the outer ring of the one-way bearing B4271 is fixed to the inner side of the gear B427.

[0074] While the driving motor 5 drives the power-assisting shaft 2 in reverse, under the one-way effect of the one-way bearing B4271, the worm 24 drives the gear B427 to rotate in reverse, thereby driving the gear A426 to rotate forward, and through the transmission of the gear box 425, the reciprocating screw 422 still rotates forward, and the reciprocating screw 422 drives the threaded moving block 4211 to move, thereby driving the piston 421 to move, so that the tube body 41 completes the action of absorbing or squeezing out the lubricating oil.

[0075] That is, in the above technical solution, no matter in which direction the driving motor 5 rotates to drive the power-assisting shaft 2 to work, the rotation direction of the reciprocating screw 422 remains unchanged, so that the piston 421 in the tube body 41 can effectively absorb or press out the lubricating oil, thereby ensuring the effectiveness of the circulation of the lubricating oil between the device shell 11 and the oil box 3.

[0076] In a better solution, a pressure valve is provided in the oil overflow pipe 13. When the piston 421 moves under the rotation of the reciprocating screw 422, the lubricating oil in the oil box 3 enters the pipe body 41 through the connecting pipe A32, so that the pressure in the oil box 3 decreases, and the pressure valve opens to allow part of the lubricating oil to enter the oil box. This technical solution allows part of the lubricating oil to be stored in the connecting shell 12 in the working state, so that the tooth plate 21 and the tooth column 22 in the connecting shell 12 can be fully lubricated.

[0077] The pressure valve in the above scheme can be a commonly used spring-loaded valve or a duckbill valve. The pressure valve can only be opened when the circulation mechanism 4 is running, and the lubricating oil enters the oil box 3. Based on the above records, the oil overflow pipe 13 is arranged toward the sedimentation chamber. Therefore, when the pressure valve is opened, even if the lubricating oil enters the oil box 3 at a faster flow rate, no impurities will directly pass through the filter plate 31 under the impact of the lubricating oil, so that the filter plate 31 can better filter the lubricating oil in the oil box 3.

[0078] In addition, in the above technical scheme, when and only when the driving motor 5 drives the power-assisting shaft 2 to work, the piston 421 in the circulation mechanism 4 moves in the tube body 41 to press the lubricating oil in the oil box 3 into the device shell 11, and then enters the gear plate 21 and the gear column 22 from the oil leakage port 112 to lubricate the working parts; and as the working frequency of the power-assisting shaft 2 increases, the absorption and extrusion frequency of the lubricating oil by the circulation mechanism 4 increases synchronously, ensuring that the power-assisting shaft 2 can be fully lubricated under high-frequency operation, and this process does not require the aid of external metering equipment or feedback equipment, reducing the investment in the control system in the overall device.

[0079] Reference Figure 1 and Figure 8 A heat dissipation mechanism 6 is arranged on the outside of the driving motor 5, and the heat dissipation mechanism 6 includes a heat dissipation box 61. One end of the oil outlet pipe 4111 is fixedly arranged on the outside of the heat dissipation box 61. A semiconductor refrigeration sheet 62 is arranged on the inside of the heat dissipation box 61. The hot end of the semiconductor refrigeration sheet 62 is arranged on the side away from the heat dissipation box 61. The inner end of the semiconductor refrigeration sheet 62 is arranged on the side close to the heat dissipation box 61. Heat dissipation fins 63 are arranged on the outside of the semiconductor refrigeration sheet 62. A cleaning brush 64 is fixedly arranged on one end of the reciprocating screw rod 422 close to the heat dissipation fins 63. A connecting pipe B611 is fixedly arranged on the top of the heat dissipation box 61. One end of the connecting pipe B611 is fixedly arranged on the top of the device shell 11.

[0080] The oil outlet pipe 4111 inputs the lubricating oil into the heat sink box 61. An S-shaped heat sink is provided in the heat sink box 61. The lubricating oil is dissipated by the cooling effect of the semiconductor refrigeration sheet 62. The heat is dissipated from the semiconductor refrigeration sheet 62 by the heat dissipation fins 63. When the reciprocating screw 422 rotates, the surface of the heat dissipation fins 63 can be cleaned by the cleaning brush 64. The connecting pipe B611 transports the lubricating oil to the device shell 11.

[0081] Reference Figure 1 , Figure 6 and Figure 7 A torque sensor 4221 is provided on the outer side of the reciprocating screw 422 for detecting the torque of the reciprocating screw 422 , and a controller 51 is provided at the bottom of the driving motor 5 , which receives the torque signal and controls the operation of the driving motor 5 .

[0082] The torque of the reciprocating screw 422 can be detected by the torque sensor 4221. The filtering effect of the oil box 3 can be judged according to the torque degree of the reciprocating screw 422, and the oil box 3 can be cleaned or replaced. The controller 51 can receive the torque signal of the reciprocating screw 422 and control the operation of the drive motor 5.

[0083] In summary, when the gear-type automobile electric power steering device disclosed in the embodiment of the present application is in use, the driving motor 5 drives the worm 24 to rotate, and the worm 24 drives the worm wheel 23 to rotate to perform a deceleration process, and the worm wheel 23 drives the tooth column 22 to rotate, thereby driving the tooth plate 21 to move, so that the power-assisting shaft 2 completes the steering effect, and when the driving motor 5 drives the power-assisting shaft 2 to work in the forward direction, under the unidirectional effect of the one-way bearing A4231, the driving pulley 423 and the belt 424 run, thereby driving the reciprocating screw 422 to rotate, and the reciprocating screw 422 drives the threaded moving block 4211 to move, thereby driving the piston 421 to move, so that the tube body 41 completes the action of absorbing or pressing out the lubricating oil, and when the driving motor 5 drives the power-assisting shaft 2 to work in the reverse direction, under the unidirectional effect of the one-way bearing B4271, the worm 24 drives the gear B4 27 rotates in the reverse direction, thereby driving the gear A426 to rotate forward, and through the transmission of the gear box 425, the reciprocating screw 422 still rotates forward, and the reciprocating screw 422 drives the threaded moving block 4211 to move, thereby driving the piston 421 to move, so that the tube body 41 completes the action of absorbing or pressing out the lubricating oil, so that the circulation mechanism 4 sucks out the lubricating oil inside the oil box 3 and then presses it into the device shell 11 again. The lubricating oil lubricates the device inside the equipment and finally falls back into the oil box 3. It is filtered by the filter plate 31 in the oil box 3 and waits for the next absorption by the circulation mechanism 4. The equipment can filter the lubricating oil and realize the circulating flow of the lubricating oil. The technical problem that the commutator will affect the lubricating oil protection performance due to wear is solved, and the technical effect that the impurities inside the commutator can be cleaned to reduce the impact on the lubricating oil protection performance is achieved.

[0084] In this application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0087] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. Gear-type automotive electric power steering, characterized in that: include: A housing, wherein a device shell is disposed on the top of the housing; A booster shaft, slidably disposed in the housing; An oil box is detachably arranged at the bottom of the shell, and a filter plate for filtering lubricating oil is arranged inside the oil box; A circulation mechanism is arranged on one side of the housing, and is used to suck out the filtered lubricating oil in the oil box and inject it into the interior of the device housing; A driving motor is arranged on the top of the oil box, the driving motor can drive the power-assist shaft to move in the housing, and the circulation mechanism is driven by the driving motor; wherein a tooth plate is arranged on the outside of the power-assist shaft, one side of the tooth plate is meshed with a tooth column, and the tooth plate is arranged obliquely on the outside of the power-assist shaft; a worm wheel is arranged on the top of the tooth column, a worm is arranged on one side of the worm wheel, and one end of the worm is transmission-arranged at the output shaft of the driving motor; Wherein, the filter plate is obliquely arranged in the oil box to separate a clean oil tank from the oil box; A connecting pipe A is provided on the outside of the oil box, the connecting pipe A is connected to the clean oil tank, and the connecting pipe A is connected to the circulation mechanism through a connecting piece A; Wherein, the circulation mechanism comprises: A tube body is arranged on one side of the device shell, and a one-way oil outlet valve and a one-way oil inlet valve are arranged on the outer side of the tube body; wherein the one-way oil outlet valve is connected to an oil outlet pipe, and the oil outlet pipe is connected to the shell; the one-way oil inlet valve is connected to an oil inlet pipe, and the oil inlet pipe is connected to the oil box through a connector C; A driving mechanism is disposed in the tube body, and the driving mechanism includes a piston, and the piston is driven to move in the tube body; A reciprocating screw rod is arranged at the output end of the driving motor through a one-way bearing A; A threaded moving block, the thread of which is arranged on the outside of the reciprocating screw rod, and the threaded moving block can move on the outside of the reciprocating screw rod when the reciprocating screw rod rotates; the threaded moving block is connected to one side of the piston; A gear box is arranged at one end of the reciprocating screw rod away from the driving motor. Gear B is arranged at one end of the worm through a one-way bearing B. One side of the gear B is meshed with gear A, and the gear A is connected to the input shaft of the gear box.

2. The gear-type automotive electric power steering device according to claim 1, characterized in that: The bottom of the tooth column is provided with a stirring rod, and the stirring rod is arranged on the top of the filter plate.

3. The gear-type automotive electric power steering device according to claim 2, characterized in that: Also includes: A bearing ring is arranged in the device housing, one end of the bearing ring is connected to the gear column; a plurality of oil leakage ports are provided on the inner side of the device housing and located outside the bearing ring, and the oil leakage ports are connected to the oil box; A transparent tube is connected to the bottom end of the device shell and extends out of the device shell.

4. The gear-type automotive electric power steering device according to claim 1, characterized in that: Also included is a heat sink box, which is used to dissipate heat from the circulating lubricating oil; Wherein, the oil outlet pipe is connected to the heat dissipation box, and the other end of the heat dissipation box is connected to the device shell through a connecting pipe.

5. The gear-type automotive electric power steering device according to claim 4, characterized in that: A semiconductor refrigeration sheet is arranged in the heat dissipation box; the hot end of the semiconductor refrigeration sheet is arranged on a side away from the heat dissipation box, and the cold end of the semiconductor refrigeration sheet is arranged on a side close to the heat dissipation box; The outer side of the semiconductor refrigeration plate is provided with a heat dissipation fin, and one end of the reciprocating screw rod close to the heat dissipation fin is provided with a cleaning brush, and the cleaning brush abuts against the outer side of the heat dissipation fin.

6. The gear-type automotive electric power steering device according to claim 1, characterized in that: A torque sensor is arranged on the outer side of the reciprocating screw rod, and the driving motor responds to the torque sensor.

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