Steering transmission device, steering device, steering system and vehicle

Abstract

The invention discloses a steering transmission device, a steering device, a steering system and a vehicle. The steering transmission device comprises a driving part, a steering assembly and a cycloidal-pin wheel speed reducing mechanism, the cycloidal-pin wheel speed reducing mechanism is in transmission connection between the driving part and the steering assembly, and the cycloidal-pin wheel speed reducing mechanism comprises a first cycloidal wheel and a second cycloidal wheel which are in transmission connection; the steering transmission device has a large transmission ratio, so that the steering transmission device can have large output torque, and the output power of the driving part can be reduced easily.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and more specifically, to a steering transmission device, a steering device, a steering system and a vehicle. Background Art

[0002] In the related art, the existing electric power steering generally adopts a combination structure of a planetary gear reduction mechanism and a cylindrical gear reduction mechanism to reduce the power output of the power motor and increase the torque. However, the structure of the planetary gear electric power steering is complex, the manufacturing and processing cost is high, and the output torque is small. It generally needs to be driven by a high-power motor, which consumes a lot of energy.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0004] An object of the present invention is to provide a new technical solution for a steering transmission.

[0005] According to a first aspect of the present invention, a steering transmission device is provided. The steering transmission device comprises:

[0006] Driving parts;

[0007] Steering components;

[0008] A cycloid pinwheel reduction mechanism, wherein the cycloid pinwheel reduction mechanism is transmission-connected between the driving member and the steering assembly;

[0009] The cycloid pinwheel reduction mechanism comprises a first cycloid wheel and a second cycloid wheel which are transmission-connected.

[0010] Optionally, the first cycloid wheel is connected to the rotating shaft of the driving member via a first bearing, and the first bearing is arranged offset from the end face center of the first cycloid wheel.

[0011] Optionally, the steering assembly includes a worm wheel and a worm that are meshed and connected, and the worm wheel is sleeved on the output shaft of the cycloid pinwheel reduction mechanism.

[0012] Optionally, the steering assembly further comprises a first housing, the worm wheel and the worm are adapted to be disposed in the first housing, and the output shaft 17 of the cycloid pinwheel reduction mechanism is rotatably connected to the first housing via a second bearing.

[0013] Optionally, the cycloid pinwheel reduction mechanism further includes a transmission shaft, and the transmission shaft is transmission-connected between the first cycloid wheel and the second cycloid wheel.

[0014] Optionally, the cycloid pinwheel reduction mechanism further includes a third bearing, the third bearing is sleeved on the rotating shaft, and the transmission shaft is sleeved on the outer ring of the third bearing.

[0015] Optionally, the output shaft of the cycloid pinwheel reduction mechanism is suitable for being connected to the wheel drivingly to drive the wheel to turn.

[0016] According to a second aspect of the present application, a steering device is provided, which comprises a steering wheel and the steering transmission device of the above embodiment, wherein the steering wheel is in transmission connection with the steering assembly.

[0017] According to a third aspect of the present application, a steering system is provided, which includes the steering device of the above embodiment.

[0018] According to a fourth aspect of the present application, a vehicle is provided, which includes the steering system of the above embodiment.

[0019] A technical effect of the present application is that the driving member is connected to the steering assembly through a cycloidal pinwheel reduction mechanism to achieve auxiliary steering. The cycloidal pinwheel reduction mechanism includes a first cycloidal wheel and a second cycloidal wheel that are transmission-connected, thereby enabling the steering transmission device to have a larger transmission ratio, so that a driving member with smaller power can also output a larger torque. In addition, the steering transmission device of the present application has a simple structure, a simple processing technology, and a low processing and manufacturing cost.

[0020] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 It is a schematic diagram of the structural decomposition of a steering transmission device of an embodiment of the present application.

[0023] Figure 2 It is a cross-sectional view of a steering transmission device according to an embodiment of the present application.

[0024] Figure 3 It is a cross-sectional view of a steering transmission device according to another embodiment of the present application.

[0025] Reference numerals:

[0026] 1. Driving member; 2. First bearing; 3. Third bearing; 4. First needle pin; 5. First end cover; 6. Second cycloidal wheel; 7. Needle gear sleeve; 8. Second needle pin; 9. First housing; 10. Second bearing; 11. Worm gear; 111. Vent; 12. First locking nut; 13. First circlip; 14. Ninth bearing; 15. First oil seal; 16. Dust seal; 17. Output shaft; 18. Fourth bearing; 19. Tenth bearing; 20. First pin; 21. Pin sleeve; 22, transmission shaft; 23, second cylindrical pin; 24, fifth bearing; 25, worm; 26, second oil seal; 27, second elastic retaining ring; 28, second locking nut; 29, third locking nut; 30, sixth bearing; 31, seventh bearing; 32, angle sensor; 33, eighth bearing; 34, second end cover; 35, third oil seal; 36, input mechanism; 37, cylindrical pin; 38, torsion bar; 39, first cycloidal wheel; 40, second housing; 41, limiter. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] According to one embodiment of the present application, a steering transmission device is provided. Figures 1 to 3 As shown, the steering transmission device includes a driving member 1, a cycloidal pinwheel reduction mechanism and a steering assembly. The cycloidal pinwheel reduction mechanism is transmission-connected between the driving member 1 and the steering assembly, and the cycloidal pinwheel reduction mechanism includes a first cycloidal wheel 39 and a second cycloidal wheel 6 which are transmission-connected.

[0033] In this example, the driving member 1 is connected to the steering assembly through a cycloidal pinwheel reduction mechanism to achieve auxiliary steering. The cycloidal pinwheel reduction mechanism includes a first cycloidal wheel 39 and a second cycloidal wheel 6 that are transmission-connected, so that the steering transmission device can have a larger transmission ratio, so that the driving member 1 with smaller power can also output a larger torque. In addition, the steering transmission device of the present application has a simple structure, a simple processing technology, and a low processing and manufacturing cost.

[0034] like Figures 1 to 3 As shown, in this example, the driving member 1 can be a motor, and the motor is connected to the input end of the cycloid pinwheel reduction mechanism. That is, the rotating shaft of the motor is connected to the input end of the cycloid pinwheel reduction mechanism. The output shaft 17 of the cycloid pinwheel reduction mechanism is connected to the steering assembly, and the steering assembly is connected to the steering wheel. When the driver turns the steering wheel, the steering wheel drives the input mechanism 36 to rotate through the steering column and the intermediate shaft, and the angle sensor 32 generates a signal and sends it to the motor, so that the motor starts working, and the motor drives the wheel to turn through the cycloid pinwheel reduction mechanism. At the same time, the cycloid pinwheel reduction mechanism can also drive the worm wheel 11 to rotate, and the worm wheel 11 drives the worm 25 to rotate with the input mechanism 36, so that the driver can turn the steering wheel more effortlessly.

[0035] In this example, the cycloidal pinwheel reduction mechanism has a first cycloidal wheel 39 and a second cycloidal wheel 6 which are transmission-connected. By setting two cycloidal wheels, the two-stage transmission of the cycloidal pinwheel reduction mechanism is realized, so as to increase the transmission ratio of the cycloidal pinwheel reduction mechanism, so as to generate a larger output torque through a smaller input torque. The cycloidal pinwheel reduction structure has a large transmission ratio, so that a motor with a smaller torque can be used to meet the output torque of about 10,000 Nm of heavy vehicles, which solves the difficulties and high costs of developing large torque motors. In addition, the provision of two cycloidal wheels can meet a larger output torque, and can also avoid excessive transmission levels that lead to large energy losses, so as to ensure transmission efficiency. In addition, compared with the gear-type reduction structure, the cycloidal pinwheel reduction mechanism of the present application is more stable during high-speed transmission and is not prone to abnormal noise.

[0036] Of course, the driving member 1 may also be other types of rotation driving mechanisms, and those skilled in the art may determine according to actual conditions, and no specific limitation is made here.

[0037] like Figure 1 and Figure 2 As shown, in this example, two cycloid wheels are provided, and the two cycloid wheels are connected by a tenth bearing 19. The tenth bearing 19 is arranged offset from the end face center of the second cycloid wheel 6. That is, the tenth bearing 19 is an eccentric bearing relative to the second cycloid wheel 6.

[0038] In an example, the first cycloid wheel 39 is connected to the rotating shaft of the driving member 1 through a first bearing 2 , and the first bearing 2 is arranged offset from the end surface center of the first cycloid wheel 39 .

[0039] like Figure 1 and Figure 2 As shown, the first cycloidal wheel 39 and the driving member 1 are connected by transmission through the first bearing 2. For example, the first cycloidal wheel 39 is connected to the rotating shaft of the motor through the first bearing 2. The first bearing 2 is sleeved on the rotating shaft, and the first cycloidal wheel 39 is sleeved on the first bearing 2. The first bearing 2 is arranged to deviate from the end face center of the first cycloidal wheel 39, so that the first bearing 2 is an eccentric bearing relative to the first cycloidal wheel 39.

[0040] In an example, Figure 1 and Figure 3 As shown, the steering assembly includes a worm wheel 11 and a worm 25 that are meshed and connected, and the worm wheel 11 is sleeved on the output shaft 17 of the cycloid pinwheel reduction mechanism.

[0041] like Figure 3 As shown, in this example, the driving member 1 is connected to the worm gear 11 of the transmission mechanism through the cycloid pinwheel reduction mechanism, that is, the worm gear 11 is sleeved on the output shaft 17 of the cycloid pinwheel reduction mechanism. The worm gear 11 is meshedly connected to the worm 25, and the worm 25 is connected to the input mechanism 36, which can realize auxiliary steering. The steering transmission device of the present application has a simple structure, a simple processing technology, and a low processing and manufacturing cost.

[0042] In one example, the steering assembly further includes a first housing 9 , the worm wheel 11 and the worm 25 are adapted to be disposed in the first housing 9 , and the output shaft 17 of the cycloid pinwheel reduction mechanism is rotatably connected to the first housing 9 via a second bearing 10 .

[0043] like Figure 1 and Figure 2 As shown, the output shaft 17 is passed through the first housing 9, and a second bearing 10 is provided between the output shaft 17 and the inner wall of the first housing 9 to reduce the friction of the output shaft 17 and make the output shaft 17 rotate more stably. The second bearing 10 is sleeved on the outer side of the output shaft 17, and the outer ring of the second bearing 10 can be fixed to the inner wall of the first housing 9.

[0044] like Figures 1 to 3 As shown, in this example, the worm wheel 11 is connected to the output shaft 17. The worm wheel 11 is accommodated in the first housing 9, and the worm 25 is disposed through the side wall of the first housing 9 and can be meshed and connected with the worm wheel 11.

[0045] like Figure 2As shown, the worm wheel 11 is fixedly sleeved on the output shaft 17, and the output shaft 17 is provided with a boss, and one end of the worm wheel 11 along the axial direction abuts against the boss to be limited by the boss. The output shaft 17 is provided with a first locking nut 12 at the end of the worm wheel 11 away from the boss to lock and limit the worm wheel 11. Alternatively, the worm wheel 11 and the output shaft 17 can also be connected by welding, riveting or bonding. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0046] like Figure 1 and Figure 2 As shown, the first housing 9 is provided with a second open end at the end away from the first end cover 5, and the output shaft 17 can be inserted into the second open end and connected to the wheel transmission, so as to drive the wheel to turn. A first elastic circlip 13 is provided at the second open end, and the first elastic circlip 13 is located on the side of the first locking nut 12 away from the worm gear 11. The first elastic circlip 13 is sleeved on the output shaft 17, and a groove is provided on the inner wall of the first housing 9 along the circumference of the first elastic circlip 13, and the first elastic circlip 13 can be at least partially embedded in the groove to limit the first elastic circlip 13. By providing the first elastic circlip 13, a shock absorbing effect can be achieved on the output shaft 17.

[0047] like Figure 2 As shown, a ninth bearing 14 is also provided at the second open end of the first housing 9. The ninth bearing 14 is sleeved on the outer side of the output shaft 17, and the outer ring of the ninth bearing 14 can be fixed to the inner wall of the first housing 9 to reduce the friction of the output shaft 17 and make the output shaft 17 rotate more stably. The ninth bearing 14 can be a roller bearing or a roller bearing, and those skilled in the art can determine it according to the actual situation, and no specific limitation is made here.

[0048] like Figure 2 As shown, in this example, the ninth bearing 14 is located on the side of the first circlip 13 away from the first locking nut 12. The side of the ninth bearing 14 away from the first circlip 13 is also provided with a first oil seal 15 and a dust seal 16 in sequence to seal the second open end of the first housing 9.

[0049] In one example, the cycloid pinwheel reduction mechanism further includes a transmission shaft 22 , and the transmission shaft 22 is transmission-connected between the first cycloid wheel 39 and the second cycloid wheel 6 .

[0050] In this example, the cycloidal pinwheel reduction mechanism also includes a transmission shaft 22, which is suitable for transmission connection between the first cycloidal wheel 39 and the second cycloidal wheel 6. The transmission shaft 22 is sleeved with the tenth bearing 19, and the second cycloidal wheel 6 is sleeved on the tenth bearing 19. The second pin 23 is sequentially axially penetrated through the first cycloidal wheel 39 and connected to the transmission shaft 22, so that the first cycloidal wheel 39 can drive the transmission shaft 22 to rotate, thereby driving the second cycloidal wheel 6 to rotate through the tenth bearing 19, and the second cycloidal wheel 6 is transmission-connected to the output shaft 17, which can form a two-stage transmission. Among them, the output shaft 17 can be transmission-connected with the steering assembly and the wheel.

[0051] In an example, Figure 2 As shown, the cycloid pinwheel reduction mechanism further includes a third bearing 3 , the third bearing 3 is sleeved on the rotating shaft, and the transmission shaft 22 is sleeved on the outer ring of the third bearing 3 .

[0052] like Figure 2 As shown, in this example, a third bearing 3 is also sleeved on the rotating shaft of the driving member 1, and the transmission shaft 22 is sleeved on the outer ring of the third bearing 3 to improve the smoothness of the rotation of the transmission shaft 22, reduce energy loss, and avoid abnormal noise.

[0053] In one example, the output shaft 17 of the cycloid pinwheel reduction mechanism is suitable for being connected to the wheel in driving mode to drive the wheel to turn. The output shaft 17 can drive the wheel to rotate to achieve auxiliary steering.

[0054] In this example, when the steering transmission device is used in a vehicle, it is used to assist steering. The input mechanism 36 is connected to the steering wheel in a transmission manner, and the rotation of the steering wheel can drive the input mechanism 36 to rotate. The worm 25 is connected to the input mechanism 36, and the worm 25 can rotate with the input mechanism 36, so that the driver can turn the steering wheel more effortlessly. At the same time, the output shaft 17 of the steering transmission device can also drive the wheels to rotate for steering. The steering transmission device of the present application has a compact structure and a small size, which is convenient for the layout of the entire vehicle. In addition, most of the cycloid pinwheel reduction mechanism are shaft parts, and the required processing equipment and processing technology are simple, and the manufacturing cost is low. The transmission structure is simple and efficient, the transmission efficiency can reach a maximum of 0.95, and the energy consumption is low.

[0055] In one example, the steering assembly is adapted to be drivingly coupled to a steering wheel.

[0056] The steering assembly includes an input mechanism 36, which is connected to the steering wheel by transmission, that is, the input mechanism 36 is connected to the steering wheel by transmission. When the driver turns the steering wheel, the steering wheel drives the input mechanism 36 to rotate through the steering column and the intermediate shaft, and the angle sensor 32 generates a signal and sends it to the motor, so that the motor starts to work, and the motor drives the wheel to turn through the cycloidal pinwheel reduction mechanism. At the same time, the cycloidal pinwheel reduction mechanism can also drive the worm wheel 11 to rotate, and the worm wheel 11 drives the worm 25 to rotate with the input mechanism 36, so that the driver can turn the steering wheel more effortlessly.

[0057] like Figure 1 and Figure 2 As shown, in this example, the second cycloid wheel 6 and the output shaft 17 are connected by a first pin 20. The first pin 20 is axially penetrated in the second cycloid wheel 6 and fixedly connected to the output shaft 17. A pin sleeve 21 is sleeved on the outer side of the first pin 20 in the second cycloid wheel 6. The outer side of the transmission shaft 22 is also sleeved with a fourth bearing 18, and the fourth bearing 18 is located on one side of the first offset bearing in the axial direction. The output shaft 17 is sleeved on the outer side of the fourth bearing 18 to reduce the friction of the output shaft 17 and rotate more stably.

[0058] In an example, Figure 1 and Figure 2 As shown, the cycloid pinwheel reduction mechanism includes a first end cover 5 , and the first end cover 5 is provided with a plurality of first needle pins 4 along the circumferential direction. The plurality of first needle pins 4 are suitable for meshing with the first cycloid wheel 39 .

[0059] like Figure 1 and Figure 2 As shown, in this example, the cycloidal pinwheel reduction mechanism includes a first end cover 5 and a first housing 9. The first end cover 5 is connected to the first housing 9 and is suitable for sealing the first housing 9. The second cycloidal wheel 6 and other components are arranged in the first housing 9. The first end cover 5 is provided with a plurality of first needle pins 4 along the circumferential direction, and the plurality of first needle pins 4 can be meshed with the first cycloidal wheel 39 to achieve the purpose of deceleration and torque transmission. The first needle pins 4 are arranged on the first end cover 5, and the first cycloidal wheel 39 is embedded in the first end cover 5, so that the structure of the cycloidal pinwheel reduction mechanism is more compact, which is conducive to the miniaturization design of the cycloidal pinwheel reduction mechanism.

[0060] In this example, the first end cover 5 can be connected to the first open end of the first shell 9 by fasteners such as screws or bolts. Alternatively, the first end cover 5 and the first shell 9 can also be connected by other means such as welding, which can be determined by those skilled in the art according to actual conditions and is not specifically limited here.

[0061] like Figure 1 and Figure 2As shown, a plurality of second needle pins 8 are also arranged in the circumferential direction in the first housing 9, and the plurality of second needle pins 8 are suitable for meshing with the second cycloidal wheel 6 to achieve the purpose of deceleration and torque transmission. A needle tooth sleeve 7 is also sleeved on the outer side of the second needle pin 8, which can reduce the friction of the second cycloidal wheel 6, extend the service life of the equipment, and improve the transmission efficiency.

[0062] Among them, the deceleration principle of the cycloid pinwheel deceleration mechanism belongs to the conventional technology in this field and will not be described here.

[0063] In an example, Figure 1 and Figure 3 As shown, the steering assembly further includes a limiter 41, which can limit the rotation angle of the worm wheel 11. The limiter 41 limits the rotation angle of the worm wheel 11 to limit the rotation angle of the output shaft 17, thereby limiting the rotation angle of the output shaft 17.

[0064] like Figure 3 As shown, in this example, the worm wheel 11 is provided with a tooth portion and a relief portion 111 along the circumferential direction, the tooth portion is suitable for meshing with the worm 25, and the end of the relief portion 111 along the circumferential direction can abut against the limiter 41 to limit the rotation of the worm wheel 11.

[0065] The worm wheel 11 is provided with teeth and a relief portion 111 along the circumferential direction, wherein the teeth are continuous meshing teeth, and the teeth mesh with the worm 25, and can drive the worm 25 to rotate. The relief portion 111 is a groove provided on the surface of the worm wheel 11 along the circumferential direction, and the limiter 41 can extend into the groove. After the worm wheel 11 rotates to the maximum angle, the limiter 41 can abut against one end of the groove along the circumferential direction, thereby limiting the worm wheel 11 from continuing to rotate.

[0066] like Figure 3 As shown, in this example, the limiting member 41 is connected to the inner wall of the first shell 9 , and the limiting member 41 corresponds to the venting portion 111 .

[0067] The limiting member 41 may be a limiting rod or a limiting shaft. The limiting rod is fixedly connected to the first housing 9, for example, by screwing or welding. One end of the limiting rod is passed through the inner wall of the first housing 9 and can correspond to the venting portion 111. For example, the limiting rod can extend into the groove forming the venting portion 111. After the worm wheel 11 rotates to the maximum angle, the limiting member 41 can abut against one end of the groove along the circumferential direction, thereby limiting the worm wheel 11 from continuing to rotate.

[0068] In this example, the rotation angle of the output shaft 17 can also be limited by the stopper 41, thereby limiting the rotation angle of the worm wheel 11. That is, a groove can be provided on the output shaft 17 along the circumferential direction, and the stopper 41 corresponds to the groove.

[0069] like Figure 3 As shown, in this example, a fifth bearing 24 is further disposed in the first housing 9 , and the inner ring of the fifth bearing 24 is sleeved on the worm 25 , so that the worm 25 can rotate smoothly and stably.

[0070] In an example, Figure 1 and Figure 3 As shown, the steering assembly further includes an angle sensor 32 , and the angle sensor 32 is connected to the worm 25 and the input mechanism 36 respectively.

[0071] like Figure 1 and Figure 3 As shown, the input mechanism 36 includes an input shaft, a part of the angle sensor 32 is connected to the input shaft, and the other part is connected to the worm 25. The input shaft is connected to the steering wheel, and the steering wheel rotates, thereby driving the input shaft to rotate. The angle sensor 32 can generate an angle and torque signal of the input shaft relative to the worm 25, and send the signal to the drive member 1. When the drive member 1 is working, the drive member 1 drives the worm wheel 11 to rotate through the cycloid pinwheel reduction mechanism, and the worm wheel 11 drives the worm 25 to rotate, so that the worm 25 rotates along the rotation direction of the input shaft, so that the driver can save more effort when turning the steering wheel. At the same time, the output shaft 17 can drive the wheel to rotate to achieve auxiliary steering. Among them, the angle sensor 32 can be a torque angle sensing structure.

[0072] like Figure 3 As shown, in this example, the worm 25 is provided with a mounting groove along the axial direction, and one end of the input shaft is embedded in the mounting groove. A seventh bearing 31 is also provided between the input shaft and the inner wall of the mounting groove. The seventh bearing 31 is sleeved on the input shaft. Among them, the seventh bearing 31 can be a sliding bearing. A torsion bar 38 is also provided in the input shaft, and the torsion bar 38 and the input shaft are coaxially arranged. The cylindrical pin 37 can be radially penetrated through the input shaft and the torsion bar 38, so that the torsion bar 38 and the input shaft are fixed by the cylindrical pin 37. One end of the torsion bar 38 can be penetrated through the input shaft and connected to the mounting groove of the worm 25. The input shaft is deformed by the torsion bar 38 to produce relative rotation with the worm 25, so that the angle sensor 32 generates a signal and sends it to the driving member 1.

[0073] like Figure 3 As shown, in this example, the first housing 9 is further provided with a third opening end. The worm 25 is inserted through the third opening end and meshedly connected to the worm wheel 11. The second opening end is also provided with a second elastic retaining ring 27 and a second oil seal 26 in sequence from the outside to the inside, and the second elastic retaining ring 27 and the second oil seal 26 are respectively sleeved on the worm 25. The second elastic retaining ring 27 can have a shock absorbing effect on the worm 25. The second oil seal 26 can seal the third opening end.

[0074] like Figure 3As shown, in this example, the steering assembly further includes a second housing 40. The second housing 40 can be connected to the first housing 9 by fasteners such as screws. The angle sensor 32 is disposed in the second housing 40. The worm 25 is partially accommodated in the second housing 40. The second housing 40 has a fourth open end corresponding to the third open end, so that the worm 25 can extend from the fourth open end and then extend into the first housing 9 from the third open end.

[0075] like Figure 3 As shown, a sixth bearing 30 is disposed in the second housing 40, and the inner ring of the sixth bearing 30 is sleeved on the worm 25, so that the worm 25 can rotate more smoothly and stably. A boss is disposed in the second housing 40, and one end of the sixth bearing 30 along the axial direction abuts against the boss, and the worm 25 is provided with a second locking nut 28 at the other end of the sixth bearing 30 to lock and limit the sixth bearing 30.

[0076] In this example, if Figure 3 As shown, a third locking nut 29 is also threadedly connected to the inner wall of the fourth open end of the second housing 40 , which can lock and limit the worm 25 and the sixth bearing 30 as a whole.

[0077] like Figure 1 and Figure 3 As shown, in this example, the steering assembly further includes a second end cover 34. A fifth opening end is provided on the side of the second housing 40 away from the fourth opening end, which is suitable for placing components such as the angle sensor 32 into the second housing 40. The second end cover 34 is connected to the fifth opening end, and is suitable for encapsulating the fifth opening end of the second housing 40. The second end cover 34 can be connected to the second housing 40 by fasteners such as studs or screws, or the second end cover 34 can also be connected by riveting or welding, etc., which can be determined by those skilled in the art according to actual conditions and is not specifically limited here.

[0078] The input shaft is passed through the second end cover 34. An eighth bearing 33 is arranged inside the second end cover 34, and the inner ring of the eighth bearing 33 is sleeved on the outer side of the input shaft to make the input shaft rotate more smoothly and stably. A third oil seal 35 is also arranged on one side of the eighth bearing 33, which is suitable for sealing the second end cover 34.

[0079] According to another embodiment of the present application, a steering device is provided, which includes a steering wheel and the steering transmission device of the above embodiment, wherein the steering wheel is suitable for transmission connection with the steering assembly.

[0080] In this example, the steering assembly is connected to the steering wheel. When the driver turns the steering wheel, the steering wheel drives the input mechanism 36 to rotate through the steering column and the intermediate shaft, and the angle sensor 32 generates a signal and sends it to the motor, so that the motor starts to work, and the motor drives the wheel to turn through the cycloidal pinwheel reduction mechanism. At the same time, the cycloidal pinwheel reduction mechanism can also drive the worm wheel 11 to rotate, and the worm wheel 11 drives the worm 25 to rotate along with the input mechanism 36, so that the driver can turn the steering wheel more easily.

[0081] Of course, the steering device of the present application also includes at least all the beneficial effects of the above-mentioned embodiments, which will not be elaborated here.

[0082] According to another embodiment of the present application, a steering system is provided, which includes the steering device of the above embodiment.

[0083] In this example, the steering system of the present application includes the steering device of the above embodiment, which can drive the wheel to rotate in order to achieve steering. The driving member 1 drives the wheel to turn through the cycloid pinwheel reduction mechanism, and at the same time, the cycloid pinwheel reduction mechanism can also drive the worm wheel 11 to rotate, and the worm wheel 11 drives the worm 25 to rotate along with the input mechanism 36, so that the driver can turn the steering wheel more effortlessly.

[0084] According to another embodiment of the present application, a vehicle is provided. The vehicle includes the steering system of the above embodiment. The steering system includes a steering device. The steering device also includes a steering transmission device, and the steering transmission device includes a driving member 1, a cycloidal pinwheel reduction mechanism and a steering assembly. The cycloidal pinwheel reduction mechanism is transmission-connected between the driving member 1 and the steering assembly, and the cycloidal pinwheel reduction mechanism includes a first cycloidal wheel 39 and a second cycloidal wheel 6 that are transmission-connected.

[0085] In this example, the driving member 1 is connected to the steering assembly through a cycloidal pinwheel reduction mechanism to achieve auxiliary steering. The cycloidal pinwheel reduction mechanism includes a first cycloidal wheel 39 and a second cycloidal wheel 6 that are transmission-connected, so that the steering transmission device can have a larger transmission ratio, so that the driving member 1 with smaller power can also output a larger torque. In addition, the steering transmission device of the present application has a simple structure, a simple processing technology, and a low processing and manufacturing cost.

[0086] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0087] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A steering transmission device, characterized in that: include: Driving parts; Steering components; A cycloid pinwheel reduction mechanism, wherein the cycloid pinwheel reduction mechanism is transmission-connected between the driving member and the steering assembly; The cycloid pinwheel reduction mechanism comprises a first cycloid wheel and a second cycloid wheel which are transmission-connected.

2. The steering transmission device according to claim 1, characterized in that: The first cycloid wheel is connected to the rotating shaft of the driving member through a first bearing, and the first bearing is arranged offset from the end face center of the first cycloid wheel.

3. The steering transmission device according to claim 1, characterized in that: The steering assembly comprises a worm wheel and a worm which are meshed and connected, and the worm wheel is sleeved on the output shaft of the cycloid pinwheel reduction mechanism.

4. The steering transmission device according to claim 3, characterized in that: The steering assembly further comprises a first housing, the worm wheel and the worm are adapted to be arranged in the first housing, and the output shaft 17 of the cycloid pinwheel reduction mechanism is rotatably connected to the first housing via a second bearing.

5. The steering transmission device according to claim 2, characterized in that: The cycloid pinwheel reduction mechanism also includes a transmission shaft, and the transmission shaft is transmission-connected between the first cycloid wheel and the second cycloid wheel.

6. The steering transmission device according to claim 5, characterized in that: The cycloid pinwheel reduction mechanism further includes a third bearing, wherein the third bearing is sleeved on the rotating shaft, and the transmission shaft is sleeved on the outer ring of the third bearing.

7. The steering transmission device according to claim 1, characterized in that: The output shaft of the cycloid pinwheel reduction mechanism is suitable for transmission connection with the wheel to drive the wheel to turn.

8. A steering device, characterized in that: It comprises a steering wheel and a steering transmission device according to any one of claims 1 to 7, wherein the steering wheel is transmission-connected to the steering assembly.

9. A steering system, characterized in that: Comprising a steering device as claimed in claim 8.

10. A vehicle, characterized in that: Comprising a steering system as claimed in claim 9.

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