Cycloid reduction mechanism, steer-by-wire feel simulator, steer-by-wire system and vehicle

Abstract

The utility model discloses a kind of cycloidal reduction mechanism, line control steering hand feeling simulator, line control steering system and vehicle, cycloidal reduction mechanism includes cycloidal gear and pin wheel, the outer peripheral wall of cycloidal gear has protruding part;Pin wheel movably sets in the outer periphery of cycloidal gear, the inner peripheral wall of pin wheel has guide portion, guide portion is used to guide the movement direction of protruding part, so that protruding part drives cycloidal gear to rotate, wherein, the rotation force direction of the input end of cycloidal gear is first direction, the rotation direction of cycloidal gear is second direction, the steering of first direction and second direction is opposite.According to the cycloidal reduction mechanism of the utility model, guide portion is formed on the inner peripheral wall of pin wheel, so that the radial dimension of pin wheel is more compact, occupies smaller space, reduces the processing cost of pin wheel, and then reduces the cost of cycloidal reduction mechanism, while also facilitate the arrangement of cycloidal reduction mechanism.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a cycloidal deceleration mechanism, a steer-by-wire feel simulator, a steer-by-wire system, and a vehicle. Background Technology

[0002] In related technologies, the deceleration structure in the steer-by-wire feel simulation mechanism uses a cycloidal deceleration mechanism for deceleration. The cycloidal deceleration mechanism includes a pin gear and a cycloidal wheel. The deceleration of the cycloidal deceleration structure is achieved by generating relative motion between the pin teeth of the pin gear and the tooth profile of the cycloidal wheel. The pin gear of the cycloidal deceleration mechanism has a large structure and complex assembly, occupies a large radial space, which is not conducive to the layout of the cycloidal deceleration mechanism, and also leads to a high processing cost of the cycloidal deceleration mechanism. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a cycloidal deceleration mechanism in which the guide part is disposed on the inner peripheral wall of the needle wheel, making the radial dimension of the needle wheel more compact, occupying less space, reducing the processing cost of the needle wheel, thereby reducing the cost of the cycloidal deceleration mechanism, and also facilitating the arrangement of the cycloidal deceleration mechanism.

[0004] This utility model also proposes a steer-by-wire simulator with the above-mentioned cycloidal deceleration mechanism.

[0005] This utility model also proposes a steer-by-wire system with the above-mentioned steer-by-wire feel simulator.

[0006] This utility model also proposes a vehicle having the above-mentioned steer-by-wire system.

[0007] According to a first aspect of the present invention, a cycloidal deceleration mechanism includes: a cycloidal wheel having a first axis and a protrusion on its outer peripheral wall; and a needle wheel movably sleeved on the outer peripheral side of the cycloidal wheel, the needle wheel having a second axis, the first axis and the second axis being radially spaced apart, and a guide portion integrally formed on the inner peripheral wall of the needle wheel, the guide portion being used to guide the movement direction of the protrusion, so that the protrusion drives the cycloidal wheel to rotate, wherein the rotational force direction of the input end of the cycloidal wheel is a first direction, the rotation direction of the cycloidal wheel is a second direction, and the first direction and the second direction are opposite in direction.

[0008] According to the cycloidal deceleration mechanism of this utility model embodiment, the guide part is disposed on the inner peripheral wall of the needle wheel, which improves the structure of the needle wheel, makes the radial dimension of the needle wheel more compact, occupies less space, reduces the processing cost of the needle wheel, and thus reduces the cost of the cycloidal deceleration mechanism.

[0009] According to some embodiments of the present invention, the cycloidal wheel has a first axis, the needle wheel has a second axis, and the first axis and the second axis are spaced apart.

[0010] According to some embodiments of the present invention, the guide portion is integrally formed on the inner peripheral wall of the needle wheel.

[0011] According to some embodiments of the present invention, the guide portion includes a first protrusion disposed on the inner peripheral wall of the needle wheel. The first protrusion includes a plurality of protrusions, which are evenly arranged along the inner peripheral wall of the needle wheel in the circumferential direction.

[0012] According to some embodiments of the present invention, the side of the first protrusion facing the cycloidal wheel has a circular arc transition, and the two adjacent first protrusions have a circular arc transition.

[0013] According to some embodiments of the present invention, in the axial direction of the needle wheel, the thickness of the first protrusion is less than or equal to the thickness of the needle wheel.

[0014] According to some embodiments of the present invention, the protrusion includes a second protrusion disposed on the outer peripheral wall of the cycloidal wheel. The second protrusion includes a plurality of protrusions, which are evenly arranged on the outer peripheral wall of the cycloidal wheel in the circumferential direction.

[0015] According to some embodiments of the present invention, the side of the second protrusion facing the needle wheel has a rounded transition, and there is a rounded transition between two adjacent second protrusions.

[0016] According to some embodiments of the present invention, the thickness of the second protrusion is less than or equal to the thickness of the cycloidal wheel along its axial direction.

[0017] According to some embodiments of the present invention, the guide portion includes a first protrusion disposed on the inner peripheral wall of the needle wheel, and the protrusion includes a second protrusion disposed on the outer peripheral wall of the cycloidal wheel. The number of the first protrusion is M, and the number of the second protrusion is N, satisfying that M > N.

[0018] According to some embodiments of this utility model, MN = 1.

[0019] According to some embodiments of this utility model, one of the cycloidal wheel and the pin wheel is a metal part, and the other is a non-metal part.

[0020] According to some embodiments of the present invention, the cycloidal deceleration mechanism further includes an eccentric shaft, the eccentric shaft includes a first transmission shaft, the cycloidal wheel is connected to the first transmission shaft, the first transmission shaft has a first rotation axis, the cycloidal wheel has a second rotation axis, and the first rotation axis and the second rotation axis are spaced apart.

[0021] According to some embodiments of the present invention, the eccentric shaft further includes a second transmission shaft, which is connected to one axial end of the first transmission shaft. The second transmission shaft has a third rotation axis, which is collinear with the second rotation axis. The cycloidal wheel is mounted on the second transmission shaft.

[0022] According to some embodiments of the present invention, the cycloidal deceleration mechanism further includes: a turntable wheel, the turntable wheel being disposed on one axial side of the cycloidal wheel, the turntable wheel having a pin shaft facing the pin wheel, the cycloidal wheel having a pin hole matching the pin shaft, and the turntable wheel also having an output shaft on the side opposite to the pin shaft, the output shaft being coaxially arranged with the first transmission shaft.

[0023] According to some embodiments of the present invention, the eccentric shaft further includes a third transmission shaft, which is connected to the side of the second transmission shaft opposite to the first transmission shaft. The third transmission shaft is coaxially arranged with the first transmission shaft, and the turntable wheel is mounted on the third transmission shaft.

[0024] According to some embodiments of the present invention, a first bearing is sleeved on the outer periphery of the second drive shaft, and the cycloidal wheel has a first stepped surface facing the first drive shaft, with the first bearing abutting against the first stepped surface; a second bearing is sleeved on the outer periphery of the third drive shaft, and the turntable wheel has a second stepped surface facing the third drive shaft, with the second bearing abutting against the second stepped surface.

[0025] According to some embodiments of the present invention, the cycloidal deceleration mechanism further includes: a cycloidal housing, the cycloidal housing having a first opening and a second opening arranged opposite to each other along the axial direction of the eccentric shaft, the cycloidal wheel, the pin wheel and the turntable wheel being installed into the cycloidal housing through the first opening, and the output shaft passing through the second opening.

[0026] According to some embodiments of the present invention, the outer peripheral wall of the needle wheel has a limiting block disposed toward the cycloidal housing, and the cycloidal housing has a limiting groove for accommodating the limiting block.

[0027] According to some embodiments of the present invention, the cycloidal housing has a third step surface, a fourth step surface, and a fifth step surface on the side facing the first opening. The third step surface, the fourth step surface, and the fifth step surface are spaced apart along the axial direction of the eccentric shaft. The needle wheel abuts against the third step surface, the turntable wheel abuts against the fourth step surface, and a third bearing is sleeved on the outer periphery of the output shaft. The third bearing abuts against the fifth step surface.

[0028] The steer-by-wire simulator according to a second aspect of the present invention includes: a cycloidal deceleration mechanism according to the first aspect of the present invention.

[0029] According to the steer-by-wire simulator of this utility model, by setting the above-mentioned cycloidal reduction mechanism, the torque of the steer-by-wire simulator is increased and the rotational speed of the steer-by-wire simulator is reduced. The cycloidal reduction mechanism has the advantages of large and stable transmission, smaller size, high efficiency and long service life.

[0030] According to some embodiments of the present invention, the steer-by-wire feel simulator further includes: a simulated motor; a column output shaft, wherein the cycloidal reduction mechanism is driven between the simulated motor and the column output shaft.

[0031] According to some embodiments of the present invention, the steer-by-wire simulator further includes a coupling, the coupling comprising a first shaft segment and a second shaft segment, the simulated motor having a motor shaft, and the first shaft segment and the second shaft segment being connected to each other between the motor shaft and the first transmission shaft of the cycloidal reduction mechanism.

[0032] According to some embodiments of this utility model, the output shaft of the tube column is arranged coaxially with the motor shaft.

[0033] The steer-by-wire system according to a third aspect of the present invention includes: a steer-by-wire feel simulator according to the second aspect of the present invention described above.

[0034] According to the steer-by-wire system of the present invention, by setting the above-mentioned steer-by-wire feel simulator, the steer-by-wire system can be made to have a smaller layout space and lighter weight.

[0035] A vehicle according to a fourth aspect of the present invention includes: a steer-by-wire system according to the third aspect of the present invention described above.

[0036] The vehicle according to the present invention, by setting the above-mentioned steer-by-wire system, can simulate the road feel when the vehicle is driving.

[0037] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is a schematic diagram of a steer-by-wire feel simulator according to some embodiments of the present invention;

[0040] Figure 2 yes Figure 1 A partial schematic diagram of the center-drive steering feel simulator;

[0041] Figure 3 yes Figure 2 Side view of the center-drive steering feel simulator;

[0042] Figure 4 yes Figure 3 A sectional view;

[0043] Figure 5 This is a schematic diagram of a cycloidal deceleration mechanism according to some embodiments of the present invention;

[0044] Figure 6 yes Figure 5 Exploded view of the cycloidal reduction mechanism;

[0045] Figure 7 yes Figure 5 A cross-sectional view of the cycloidal reduction mechanism in conjunction with the output shaft of the tubular column;

[0046] Figure 8 yes Figure 5 Diagram of the deceleration principle of the cycloidal deceleration mechanism.

[0047] Figure label:

[0048] 100. Drive-by-wire steering feel simulator;

[0049] 11. Simulated motor; 111. Motor shaft; 12. Column output shaft; 13. First shaft section; 14. Second shaft section; 15. First housing; 16. Second housing;

[0050] 20. Cycloidal speed reduction mechanism;

[0051] 21. Eccentric shaft; 211. First drive shaft; 212. Second drive shaft; 213. Third drive shaft;

[0052] 22. Cycloidal wheel; 221. Second protrusion; 222. Pin hole; 223. Protrusion;

[0053] 23. Pinwheel; 231. First protrusion; 232. Limiting block; 233. Guide section;

[0054] 24. Turntable wheel; 241. Pin; 242. Output shaft;

[0055] 251. First bearing; 252. Second bearing; 253. Third bearing; 254. Shim;

[0056] 26. Cycloidal housing; 261. First opening; 262. Limiting groove; 263. Protrusion. Detailed Implementation

[0057] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0058] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] The following is for reference. Figures 1-8 The cycloidal deceleration mechanism 20 according to an embodiment of the present utility model is described.

[0061] According to a first aspect embodiment of the present invention, the cycloidal deceleration mechanism 20 includes a cycloidal wheel 22 and a pin wheel 23. The cycloidal wheel 22 has a first axis, and the pin wheel 23 is movably sleeved on the outer periphery of the cycloidal wheel 22. The pin wheel 23 has a second axis, and the first axis and the second axis are spaced apart. The inner peripheral wall of the pin wheel 23 has a guide portion 233, which guides the movement direction of the protrusion 223. When the cycloidal wheel 22 rotates, it oscillates while rotating, causing the protrusion 223 to drive the cycloidal wheel 22 to rotate. The direction of the rotational force at the input end of the cycloidal wheel 22 is the first direction (see attached figure). Figure 5 The direction of rotation of the cycloidal wheel 22 is the second direction (refer to the appendix). Figure 5 The direction pointed to by the arrow representing the arc (Y in the diagram) is opposite to that of the first and second directions.

[0062] When the cycloidal wheel 22 rotates, it can rotate and oscillate. The protrusion 223 of the cycloidal wheel 22 will contact the guide part 233 of the pin wheel 23. The guide part 233 will block the protrusion 223 from rotating with the cycloidal wheel 22 in the direction of the input end. The guide part 233 will drive the cycloidal wheel 22 to rotate in the opposite direction of the rotational force of the input end of the cycloidal wheel 22, so that the rotation of the cycloidal wheel 22 is transmitted to the output shaft 242, thereby realizing the deceleration transmission from input to output.

[0063] The guide portion 233 is formed on the inner peripheral wall of the needle wheel 23, which improves the structure of the needle wheel 23, reduces multiple parts such as needle tooth pins and needle tooth sleeves, and makes the radial dimension of the needle wheel 23 more compact and occupies less space, thereby reducing the processing cost of the needle wheel 23 and thus reducing the cost of the cycloidal deceleration mechanism 20.

[0064] In a specific example, refer to Figure 8The cycloidal deceleration mechanism 20 includes an eccentric shaft 21, a cycloidal wheel 22 mounted on the eccentric shaft 21, and a protrusion 223 including a plurality of second protrusions 221. The guide section 233 includes multiple first protrusions 231. When the eccentric shaft 21 rotates, it can drive the cycloidal wheel 22 to rotate and oscillate. When the cycloidal wheel 22 oscillates, a second protrusion 221 of the cycloidal wheel 22 will contact the first protrusion 231 of the needle wheel 23. The first protrusion 231 will block the second protrusion 221 of the cycloidal wheel 22 from rotating in the same direction as the eccentric shaft 21, so that the cycloidal wheel 22 rotates in the opposite direction to the direction of movement of the eccentric shaft 21. Each second protrusion 221 of the cycloidal wheel 22 contacts all the first protrusions 231 of the needle tooth in sequence, thereby causing the cycloidal wheel 22 to rotate slowly relative to the needle wheel 23 to reduce the rotational speed of the cycloidal wheel 22. The cycloidal wheel 22 is also connected to the output shaft 242. When the slow rotation of the cycloidal wheel 22 caused by the eccentric movement is transmitted to the output shaft 242, the conversion from high-speed input to low-speed output is realized.

[0065] According to the cycloidal deceleration mechanism 20 of this utility model embodiment, the guide portion 233 is integrally formed on the inner peripheral wall of the needle wheel 23, which makes the radial dimension of the needle wheel 23 more compact, occupies less space, reduces the processing cost of the needle wheel 23, thereby reducing the cost of the cycloidal deceleration mechanism 20, and also facilitates the arrangement of the cycloidal deceleration mechanism 20.

[0066] According to some embodiments of this utility model, refer to Figures 5-6 The guide part 233 is integrally formed on the inner peripheral wall of the needle wheel 23, which improves the structure of the needle wheel 23, reduces multiple parts such as needle tooth pins and needle tooth sleeves, and makes the radial dimension of the needle wheel 23 more compact and occupies less space, thereby reducing the processing cost of the needle wheel 23, which in turn reduces the cost of the cycloidal deceleration mechanism 20, and also facilitates the arrangement of the cycloidal deceleration mechanism 20.

[0067] According to some embodiments of this utility model, refer to Figures 5-6 The guide portion 233 includes a first protrusion 231, which is disposed on the inner peripheral wall of the needle wheel 23. The structure of the first protrusion 231 simplifies the processing of the guide portion 233 and reduces costs. Designing the needle wheel 23 housing in related technologies as the first protrusion 231 on the needle wheel 23, which encloses the protrusion 223 of the cycloidal wheel 22, reduces the number of components such as needle pins and sleeves, thus lowering processing costs.

[0068] According to some embodiments of this utility model, refer to Figures 5-6 Multiple first protrusions 231 are provided, and the multiple first protrusions 231 are arranged along the inner peripheral wall of the needle wheel 23, and the multiple first protrusions 231 are evenly arranged on the inner peripheral wall of the needle wheel 23.

[0069] When the bias axis rotates, the cycloidal wheel 22 will also swing while rotating. When the cycloidal wheel 22 swings, the protrusion 223 of the cycloidal wheel 22 will contact multiple first protrusions 231 in sequence to reduce the rotational speed of the cycloidal wheel 22.

[0070] According to some embodiments of this utility model, refer to Figures 5-6 The side of the first protrusion 231 facing the cycloidal wheel 22 has a rounded transition, which can improve the guiding effect of the first protrusion 231 and reduce stress concentration on the first protrusion 231. The rounded transition between two adjacent first protrusions 231 can avoid stress concentration between two adjacent first protrusions 231.

[0071] According to some embodiments of this utility model, refer to Figures 5-6 The first protrusion 231 protrudes toward the cycloidal wheel 22, and both ends of the first protrusion 231 on the second axis extend toward the axial direction of the needle wheel 23, which can better determine the relative position between the cycloidal wheel 22 and the needle wheel 23 and reduce the performance degradation caused by assembly errors.

[0072] According to some embodiments of this utility model, refer to Figures 5-6 In the axial direction of the needle wheel 23, the thickness of the first protrusion 231 is less than or equal to the thickness of the needle wheel 23. The first protrusion 231 extends to the axial side wall of the needle wheel 23 at at least one end in the axial direction. This can increase the connection strength and overall rigidity of the first protrusion 231 on the inner peripheral wall of the needle wheel 23 and reduce the possibility of deformation under high load conditions.

[0073] According to some embodiments of this utility model, refer to Figures 5-6 The protrusion 223 includes a second protrusion 221, which is disposed on the outer peripheral wall of the cycloidal wheel 22. The structure of the second protrusion 221 makes the processing of the guide part 233 simple and low-cost.

[0074] According to some embodiments of this utility model, refer to Figures 5-6 Multiple second protrusions 221 are provided along the outer peripheral wall of the cycloidal wheel 22, and the multiple second protrusions 221 are evenly arranged on the outer peripheral wall of the cycloidal wheel 22.

[0075] When the bias axis rotates, the cycloidal wheel 22 will also swing while rotating. When the cycloidal wheel 22 swings, the multiple second protrusions 221 of the cycloidal wheel 22 will contact the guide part 233 in sequence to reduce the rotational speed of the cycloidal wheel 22.

[0076] According to some embodiments of this utility model, refer to Figures 5-6The side of the second protrusion 221 facing the pin wheel 23 has a rounded transition. When the second protrusion 221 contacts the guide portion 233, it can better cooperate with the guide portion 233 and reduce stress concentration on the second protrusion 221. The rounded transition between two adjacent second protrusions 221 can avoid stress concentration between two adjacent second protrusions 221.

[0077] According to some embodiments of this utility model, refer to Figures 5-6 The second protrusion 221 protrudes toward the needle wheel 23, and both ends of the second protrusion 221 on the first axis extend toward the axial direction of the cycloidal wheel 22, which can better determine the relative position between the cycloidal wheel 22 and the needle wheel 23 and reduce the performance degradation caused by assembly errors.

[0078] According to some embodiments of this utility model, refer to Figures 5-6 In the axial direction of the cycloidal wheel 22, the thickness of the second protrusion 221 is less than or equal to the thickness of the cycloidal wheel 22. At least one end of the second protrusion 221 in the axial direction of the cycloidal wheel 22 extends to the axial side wall of the cycloidal wheel 22, which can increase the connection strength and overall rigidity of the second protrusion 221 on the outer peripheral wall of the cycloidal wheel 22 and reduce the possibility of deformation under high load conditions.

[0079] According to some embodiments of this utility model, refer to Figures 5-6 The guide portion 233 includes a plurality of first protrusions 231 disposed on the inner peripheral wall of the needle wheel 23, and the protrusion 223 includes a plurality of second protrusions 221 disposed on the outer peripheral wall of the cycloidal wheel 22. The number of first protrusions 231 is M, and the number of second protrusions 221 is N, satisfying that M > N.

[0080] The meshing between the cycloidal wheel 22 and the pin wheel 23 is rolling. Compared with the involute gear in related technologies, the cycloidal wheel 22 has smooth operation, low noise, low heat generation, high efficiency, long service life, high power transmission, and large transmission ratio. Compared with the involute gear with the same power transmission, the volume is reduced by more than 50%, so the structure is more compact, small in size and light in weight.

[0081] The number of the first protrusion 231 and the number of the second protrusion 221 determine the reduction ratio of the cycloidal reduction mechanism 20. The formula for the reduction ratio is:

[0082]

[0083] Where i is the reduction ratio, the reduction ratio of the cycloidal reduction mechanism 20 in this application can be calculated by the above formula, and the reduction ratio of the cycloidal reduction mechanism 20 can be adjusted by adjusting the number of the first protrusion 231 and the second protrusion 221.

[0084] For example, the number of first protrusions 231, M, is 9; the number of second protrusions 221, N, is 7; and the reduction ratio of the cycloidal reduction mechanism 20 is 3.5.

[0085] According to some embodiments of this utility model, refer to Figures 5-6 The number of first protrusions 231 is M, and the number of second protrusions 221 is N, satisfying: MN = 1. By determining the number of first protrusions 231 of one of the pin wheels 23 or the number of second protrusions 221 of the cycloidal wheel 22, the number of first protrusions 231 of the other pin wheel 23 or the number of second protrusions 221 of the cycloidal wheel 22 can be determined.

[0086] For example, the number M of the first protrusion 231 is 9, the number N of the second protrusion 221 is 8, and the reduction ratio of the cycloidal reduction mechanism 20 is 8.

[0087] According to some embodiments of this utility model, refer to Figures 5-6 One of the cycloidal wheel 22 and the pinwheel 23 is a metal part, and the other is a non-metal part. Alternatively, the cycloidal wheel 22 can be metal and the pinwheel 23 can be non-metallic; or the pinwheel 23 can be metal and the cycloidal wheel 22 can be non-metallic. The metal part can be made of metal materials such as steel, aluminum, or copper; the non-metallic part can be made of non-metallic materials such as plastic polymers, rubber, or ceramics.

[0088] While ensuring that the protrusions 223 and guides 233 of the cycloidal wheel 22 and the pinwheel 23 meet the strength requirements, one of the cycloidal wheel 22 and the pinwheel 23 is made of a non-metallic material, which can better reduce contact noise and also reduce manufacturing costs. Furthermore, non-metallic parts have advantages such as light weight, low cost, low noise, and low vibration, thus ensuring that one of the cycloidal wheel 22 and the pinwheel 23 made of non-metallic material also possesses these advantages. According to some embodiments of this utility model, refer to... Figures 5-7 The cycloidal reduction mechanism 20 includes an eccentric shaft 21, which comprises a first transmission shaft 211 and a second transmission shaft 212. The first transmission shaft 211 and the second transmission shaft 212 are connected axially along the eccentric shaft 21. The first transmission shaft 211 has a second axis, and the second transmission shaft 212 has a first axis. The first axis and the second axis are radially spaced apart from each other along the eccentric shaft 21. The rotation center line of the eccentric shaft 21 is the second axis, while the center line of the second transmission shaft 212 is the first axis. The first axis and the second axis do not coincide, meaning that the rotation center line of the eccentric shaft 21 and the center line of the second transmission shaft 212 do not coincide, allowing for periodic displacement changes when the eccentric shaft 21 rotates.

[0089] The cycloidal wheel 22 is mounted on the second drive shaft 212. When the eccentric shaft 21 rotates along the first axis, the second drive shaft 212 of the eccentric shaft 21 can generate periodic displacement changes during rotation, thereby driving the cycloidal wheel 22 to generate periodic displacement changes. The eccentric shaft 21 can drive the cycloidal wheel 22 to oscillate while rotating. When the eccentric shaft 21 rotates, it can drive the cycloidal wheel 22 to rotate and oscillate. When the cycloidal wheel 22 oscillates, the protrusion 223 of the cycloidal wheel 22 will contact the guide portion 233 of the pin wheel 23. The guide portion 233 will prevent the protrusion 223 from rotating in the same direction as the eccentric shaft 21, and the guide portion 233 will drive the cycloidal wheel 22 to rotate in the opposite direction of the eccentric shaft 21. The cycloidal wheel 22 is connected to the output shaft 242 to transmit the rotation of the cycloidal wheel 22 to the output shaft 242, thereby realizing the speed reduction transmission from input to output.

[0090] According to some embodiments of this utility model, refer to Figures 5-7 The cycloidal reduction mechanism 20 further includes a turntable wheel 24, located on the side of the pin wheel 23 away from the eccentric shaft 21. The turntable wheel 24 has a pin 241 facing the pin wheel 23, and the cycloidal wheel 22 has a pin hole 222 through which the pin 241 passes, with the diameter of the pin hole 222 being larger than the diameter of the pin 241. When the cycloidal wheel 22 oscillates, the position of the pin hole 222 changes, which can drive the pin 241 to rotate, thereby driving the turntable wheel 24 to rotate. The side of the turntable wheel 24 away from the pin 241 also has an output shaft 242, which is coaxially arranged with the first transmission shaft 211. The rotational speed of the turntable wheel 24 can be output through the output shaft 242.

[0091] According to some embodiments of this utility model, refer to Figures 5-7 The eccentric shaft 21 also includes a third drive shaft 213, which is connected to the side of the second drive shaft 212 opposite to the first drive shaft 211. The turntable wheel 24 is mounted on the third drive shaft 213. When the turntable wheel 24 rotates, it can rotate around the third drive shaft 213. The third drive shaft 213 is coaxial with the first drive shaft 211, and the rotation center line of the turntable wheel 24 is collinear with the rotation center line of the first drive shaft 211. The output shaft 242 is also coaxial with the third drive shaft 213.

[0092] According to some embodiments of this utility model, refer to Figures 5-7 The outer periphery of the second drive shaft 212 is fitted with a first bearing 251. When the second drive shaft 212 rotates, the first bearing 251 can reduce the friction between the second drive shaft 212 and the cycloidal wheel 22 when they rotate relative to each other, and also allow the second drive shaft 212 and the cycloidal wheel 22 to rotate relative to each other.

[0093] The cycloidal wheel 22 has a first stepped surface facing the first drive shaft 211. The axial sidewall of the first bearing 251 abuts against the first stepped surface. The first stepped surface is used to limit the installation position of the first bearing 251 and prevent the first bearing 251 from detaching from the cycloidal wheel 22.

[0094] A second bearing 252 is sleeved on the outer periphery of the third drive shaft 213. When the third drive shaft 213 rotates, the second bearing 252 can reduce the friction between the third drive shaft 213 and the turntable wheel 24 when they rotate relative to each other, and also allow the third drive shaft 213 and the turntable wheel 24 to rotate relative to each other.

[0095] The turntable 24 has a second stepped surface facing the third drive shaft 213. The second bearing 252 abuts against the second stepped surface. The second stepped surface is used to limit the installation position of the second bearing 252 and prevent the second bearing 252 from detaching from the turntable 24.

[0096] According to some embodiments of this utility model, refer to Figures 5-7 The cycloidal reduction mechanism 20 further includes a cycloidal housing 26, which has a first opening 261 and a second opening arranged axially opposite to each other along the eccentric shaft 21. The cycloidal wheel 22, the pin wheel 23, and the turntable wheel 24 are installed into the cycloidal housing 26 through the first opening 261, facilitating their installation. An output shaft 242 passes through the second opening to output the rotational speed of the turntable wheel 24.

[0097] In a specific example, the outer peripheral wall of the needle wheel 23 has a limiting block 232, which is positioned towards the cycloidal housing 26. The inner peripheral wall of the cycloidal housing 26 has a limiting groove 262, which is used to accommodate the limiting block 232 and can be used to limit the position of the needle wheel 23, thereby fixing the position of the needle wheel 23 and preventing it from rotating. Multiple limiting blocks 232 and limiting grooves 262 are provided, in equal numbers and corresponding one-to-one, to better restrict the position of the needle wheel 23.

[0098] For example, the cycloidal housing 26 also has an annular groove, which is located adjacent to the second opening. A gasket 254 is provided in the annular groove, which surrounds the output shaft 242 of the turntable wheel 24 to seal the gap between the cycloidal housing 26 and the output shaft 242.

[0099] According to some embodiments of this utility model, refer to Figures 5-6The cycloidal housing 26 has a third step surface, a fourth step surface, and a fifth step surface on the side facing the first opening 261. The third step surface, the fourth step surface, and the fifth step surface are spaced apart along the axial direction of the eccentric shaft 21. The needle wheel 23 abuts against the third step surface, which is used to limit the installation position of the needle wheel 23. The turntable wheel 24 abuts against the fourth step surface, which is used to limit the installation position of the turntable wheel 24. A third bearing 253 is sleeved on the outer periphery of the output shaft 242. When the output shaft 242 rotates, the setting of the third bearing 253 can reduce the frictional force when the output shaft 242 rotates relative to the cycloidal housing 26, and also allow the output shaft 242 to rotate relative to the cycloidal housing 26. The third bearing 253 abuts against the fifth step surface, which is used to limit the installation position of the third bearing 253.

[0100] According to the second aspect embodiment of the present utility model, a steer-by-wire feel simulator 100 is provided, referring to... Figures 1-4 The steer-by-wire simulator 100 includes a cycloidal deceleration mechanism 20 according to the first aspect embodiment of the present invention.

[0101] According to the embodiment of the present utility model, the steer-by-wire feel simulator 100, by setting the above-mentioned cycloidal reduction mechanism 20, is used to increase the torque of the steer-by-wire feel simulator 100 and reduce the rotational speed of the steer-by-wire feel simulator 100. The cycloidal reduction mechanism 20 has the advantages of large and stable transmission, smaller size, high efficiency and long service life.

[0102] According to the second aspect embodiment of the present utility model, a steer-by-wire feel simulator 100 is provided, referring to... Figures 1-4 The steer-by-wire simulator 100 includes: a simulated motor 11 and a column output shaft 12. A cycloidal reduction mechanism 20 is connected between the simulated motor 11 and the column output shaft 12. The cycloidal reduction mechanism 20 is used to reduce the input speed of the simulated motor 11 and transmit it to the column output shaft 12 to increase the output torque. The cycloidal reduction mechanism 20 has a large and stable transmission ratio, smaller size, and more flexible arrangement.

[0103] Under different usage requirements, the transmission ratio can be changed by altering the number of the second protrusion 221 and the first protrusion 231 of the cycloidal wheel 22 and the pin wheel 23.

[0104] The intermediate mechanical connection between the steering column and the steering mechanism of the steer-by-wire system enables the vehicle to be steered entirely by electrical signals, thus eliminating the various limitations of traditional vehicle steering systems. The steer-by-wire feel simulator 100 controls the torque of the analog motor 11 through a single controller and amplifies the torque of the analog motor 11 through the cycloidal reduction mechanism 20, thereby simulating the road feel when driving a traditional vehicle.

[0105] A cycloidal reduction mechanism 20 is used as the reduction mechanism of the steer-by-wire feel simulator 100 to increase the torque of the steer-by-wire feel simulator 100 and reduce the rotational speed of the steer-by-wire feel simulator 100, so that the steer-by-wire feel simulator 100 has the characteristics of large and stable transmission, smaller size, low noise, low heat generation, high efficiency and long service life.

[0106] In a specific example, a first housing 15 and a second housing 16 are also provided on the outer side of the cycloidal reduction mechanism 20. The first housing 15 and the second housing 16 are connected to form a receiving space. The cycloidal reduction mechanism 20 is located in the receiving space, and the analog motor 11 is connected to the first housing 15. The tube column output shaft 12 passes through the second housing 16. The outer peripheral wall of the cycloidal housing 26 also has protrusions 263 protruding towards the first housing 15. The first housing 15 has grooves for accommodating the protrusions 263, and there are multiple protrusions 263 and grooves, which correspond one-to-one, for fixing the position of the cycloidal reduction mechanism 20 within the wire-controlled steering feel simulator 100.

[0107] According to some embodiments of this utility model, refer to Figures 2-4 The steer-by-wire simulator 100 also includes a coupling, which includes a first shaft segment 13 and a second shaft segment 14. The simulated motor 11 has a motor shaft 111. The first shaft segment 13 and the second shaft segment 14 are connected to each other between the motor shaft 111 and the first transmission shaft 211 of the cycloidal reduction mechanism 20. The first shaft segment 13 and the second shaft segment 14 can connect to different types of motor shafts 111 and the first transmission shaft 211, which can increase the compatibility between the simulated motor 11 and the cycloidal reduction mechanism 20.

[0108] According to some embodiments of this utility model, refer to Figures 3-4 The column output shaft 12 is coaxially arranged with the motor shaft 111, which saves the radial arrangement space of the column output shaft 12 in the whole vehicle. It will not occupy too much space in the vehicle body, nor will it interfere with the surrounding parts. It can be easily installed on the vehicle and is easy to disassemble, making it suitable for a variety of different models.

[0109] The steer-by-wire system according to a third aspect of the present invention includes: a steer-by-wire feel simulator 100 according to the second aspect of the present invention described above.

[0110] According to the steer-by-wire system of this utility model embodiment, by setting the above-mentioned steer-by-wire feel simulator 100, the steer-by-wire system can be made to have a smaller layout space and lighter weight.

[0111] A vehicle according to a fourth aspect of the present invention includes: a steer-by-wire system according to the third aspect of the present invention described above.

[0112] The vehicle according to the present invention, by setting the above-mentioned steer-by-wire system, can simulate the road feel when the vehicle is driving.

[0113] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0114] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cycloidal deceleration mechanism (20), characterized in that, include: Cycloidal wheel (22), the outer peripheral wall of which has a protrusion (223); A needle wheel (23) is movably sleeved on the outer periphery of the cycloidal wheel (22). The inner peripheral wall of the needle wheel (23) has a guide portion (233). The guide portion (233) is used to guide the movement direction of the protrusion (223), so that the protrusion (223) drives the cycloidal wheel (22) to rotate. The direction of rotation of the input end of the cycloidal wheel (22) is a first direction, and the rotation direction of the cycloidal wheel (22) is a second direction. The first direction and the second direction are opposite in direction.

2. The cycloidal deceleration mechanism (20) according to claim 1, characterized in that, The cycloidal wheel (22) has a first axis, and the needle wheel (23) has a second axis, with the first axis and the second axis spaced apart.

3. The cycloidal deceleration mechanism (20) according to claim 1, characterized in that, The guide portion (233) is integrally formed on the inner peripheral wall of the pin wheel (23).

4. The cycloidal deceleration mechanism (20) according to claim 1, characterized in that, The guide portion (233) includes a first protrusion (231) disposed on the inner peripheral wall of the needle wheel (23). There are multiple first protrusions (231). In the circumferential direction of the needle wheel (23), multiple first protrusions (231) are arranged at intervals along the inner peripheral wall of the needle wheel (23).

5. The cycloidal deceleration mechanism (20) according to claim 4, characterized in that, The side of the first protrusion (231) facing the cycloidal wheel (22) has a rounded transition, and there is a rounded transition between two adjacent first protrusions (231).

6. The cycloidal deceleration mechanism (20) according to claim 4, characterized in that, In the axial direction of the needle wheel (23), the thickness of the first protrusion (231) is less than or equal to the thickness of the needle wheel (23).

7. The cycloidal deceleration mechanism (20) according to claim 1, characterized in that, The protrusion (223) includes a second protrusion (221) disposed on the outer peripheral wall of the cycloidal wheel (22). The second protrusion (221) includes a plurality of protrusions, which are evenly arranged on the outer peripheral wall of the cycloidal wheel (22) in the circumferential direction of the cycloidal wheel (22).

8. The cycloidal deceleration mechanism (20) according to claim 7, characterized in that, The side of the second protrusion (221) facing the needle wheel (23) has a rounded transition, and there is a rounded transition between two adjacent second protrusions (221).

9. The cycloidal deceleration mechanism (20) according to claim 7, characterized in that, In the axial direction of the cycloidal wheel (22), the thickness of the second protrusion (221) is less than or equal to the thickness of the cycloidal wheel (22).

10. The cycloidal deceleration mechanism (20) according to claim 1, characterized in that, The guide portion (233) includes a plurality of first protrusions (231) disposed on the inner peripheral wall of the needle wheel (23), and the protrusion (223) includes a plurality of second protrusions (221) disposed on the outer peripheral wall of the cycloidal wheel (22). The number of the first protrusions (231) is M, and the number of the second protrusions (221) is N, satisfying that M > N.

11. The cycloidal deceleration mechanism (20) according to claim 10, characterized in that, MN = 1.

12. The cycloidal deceleration mechanism (20) according to claim 1, characterized in that, One of the cycloidal wheel (22) and the pinwheel (23) is a metal part, and the other is a non-metal part.

13. The cycloidal deceleration mechanism (20) according to claim 1, characterized in that, The cycloidal deceleration mechanism (20) further includes an eccentric shaft (21), the eccentric shaft (21) has a first transmission shaft (211), the cycloidal wheel (22) is connected to the first transmission shaft (211) for transmission, the first transmission shaft (211) has a first rotation axis, the cycloidal wheel (22) has a second rotation axis, and the first rotation axis and the second rotation axis are spaced apart.

14. The cycloidal deceleration mechanism (20) according to claim 13, characterized in that, The eccentric shaft (21) further includes a second transmission shaft (212), which is connected to one axial end of the first transmission shaft (211). The second transmission shaft (212) has a third rotation axis, which is collinear with the second rotation axis. The cycloidal wheel (22) is mounted on the second transmission shaft (212).

15. The cycloidal deceleration mechanism (20) according to claim 14, characterized in that, The cycloidal deceleration mechanism (20) further includes: a turntable wheel (24), which is disposed on one axial side of the cycloidal wheel (22). The turntable wheel (24) has a pin (241) facing the pin wheel (23). The cycloidal wheel (22) has a pin hole (222) that matches the pin (241). The turntable wheel (24) also has an output shaft (242) on the side away from the pin (241). The output shaft (242) is coaxially arranged with the first transmission shaft (211).

16. The cycloidal deceleration mechanism (20) according to claim 15, characterized in that, The eccentric shaft (21) also includes a third transmission shaft (213), which is connected to the side of the second transmission shaft (212) away from the first transmission shaft (211). The third transmission shaft (213) is coaxially arranged with the first transmission shaft (211), and the turntable wheel (24) is mounted on the third transmission shaft (213).

17. The cycloidal deceleration mechanism (20) according to claim 16, characterized in that, The second drive shaft (212) is fitted with a first bearing (251) on its outer periphery. The cycloidal wheel (22) has a first stepped surface facing the first drive shaft (211), and the first bearing (251) abuts against the first stepped surface. The third drive shaft (213) is fitted with a second bearing (252) on its outer periphery. The turntable wheel (24) has a second stepped surface facing the third drive shaft (213), and the second bearing (252) abuts against the second stepped surface.

18. The cycloidal deceleration mechanism (20) according to claim 15, characterized in that, The cycloidal deceleration mechanism (20) further includes a cycloidal housing (26), which has a first opening (261) and a second opening arranged axially opposite to each other along the eccentric shaft (21). The cycloidal wheel (22), the pin wheel (23) and the turntable wheel (24) are installed into the cycloidal housing (26) through the first opening (261), and the output shaft (242) extends out through the second opening.

19. The cycloidal deceleration mechanism (20) according to claim 18, characterized in that, The outer peripheral wall of the pinwheel (23) has a limiting block (232) disposed toward the cycloidal housing (26), and the cycloidal housing (26) has a limiting groove (262) for accommodating the limiting block (232).

20. The cycloidal deceleration mechanism (20) according to claim 19, characterized in that, The bottom wall of the cycloidal housing (26) is recessed in sequence to form a third step surface, a fourth step surface and a fifth step surface. The third step surface, the fourth step surface and the fifth step surface are spaced apart along the axial direction of the eccentric shaft (21) and are arranged in the direction of the first opening (261). The needle wheel (23) abuts against the third step surface, the turntable wheel (24) abuts against the fourth step surface, and a third bearing (253) is sleeved on the outer periphery of the output shaft (242). The third bearing (253) abuts against the fifth step surface.

21. A steer-by-wire feel simulator (100), characterized in that, include: The cycloidal deceleration mechanism (20) according to any one of claims 1-20.

22. The steer-by-wire feel simulator (100) according to claim 21, characterized in that, Also includes: Simulated motor (11); The cycloidal deceleration mechanism (20) is connected between the analog motor (11) and the cycloidal output shaft (12).

23. The steer-by-wire feel simulator (100) according to claim 22, characterized in that, The steer-by-wire simulator (100) further includes a coupling comprising a first shaft segment (13) and a second shaft segment (14), the simulated motor (11) having a motor shaft (111), the first shaft segment (13) and the second shaft segment (14) being connected to each other between the motor shaft (111) and the first transmission shaft (211) of the cycloidal deceleration mechanism (20).

24. The steer-by-wire feel simulator (100) according to claim 23, characterized in that, The output shaft (12) of the tube column is arranged coaxially with the motor shaft (111).

25. A steer-by-wire system, characterized in that, include: The steer-by-wire feel simulator (100) according to any one of claims 21-24.

26. A vehicle, characterized in that, include: The steer-by-wire system as claimed in claim 25.

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