Steering assembly, steering structure, and vehicle

Abstract

The utility model relates to a kind of steering assembly, steering structure and vehicle, the steering assembly includes motor, self-locking mechanism and cycloidal pin wheel planetary reducer, motor is used to output driving force, self-locking mechanism includes first input component and first output component, first input component is drivingly connected with motor, and first input component is connected with motor torque transmission to first output component, first output component can be self-locked relative to first input component when bearing reverse torque, to block reverse torque transmission to first input component;Cycloidal pin wheel planetary reducer, including second input shaft, second output shaft and speed reduction transmission mechanism, second input shaft is coaxially drivingly connected with first output component, speed reduction transmission mechanism is configured to reduce the rotational speed of second input shaft and increase the torque transmission to second output shaft, the steering assembly can improve the self-locking protection function of motor when vehicle is impacted by external, improve the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a steering assembly, a steering structure, and a vehicle. Background Technology

[0002] When a vehicle's wheels are subjected to external impacts, they are prone to veering to one side. In related technologies, the vehicle's steering assembly is generally combined by connecting a motor to a planetary gear reducer. The output shaft of the planetary gear reducer is connected to the steering knuckle of the wheel. When the wheel is subjected to an external impact and its angle deflects, the planetary gear reducer cannot maintain stability after the wheel is subjected to abnormal impact under the high torque of reverse acceleration, and it cannot form a self-locking protection mechanism for the motor, which can easily lead to a reduction in the lifespan of the motor. Utility Model Content

[0003] In view of this, the present invention provides a steering assembly, a steering structure, and a vehicle to improve the self-locking protection function of the motor when the vehicle is subjected to external impacts, and to improve the service life of the motor, so as to at least partially solve the above-mentioned technical problems.

[0004] A first aspect of this utility model provides a steering assembly, comprising: a motor for outputting driving force; a self-locking mechanism including a first input component and a first output component, the first input component being drive-connected to the motor and transmitting the motor torque to the first output component, the first output component being self-locking relative to the first input component when subjected to reverse torque to prevent the reverse torque from being transmitted to the first input component; and a cycloidal pinwheel planetary reducer including a second input shaft, a second output shaft, and a reduction transmission mechanism, the second input shaft being coaxially drive-connected to the first output component, the reduction transmission mechanism being configured to reduce the rotational speed of the second input shaft and transmit the increased torque to the second output shaft.

[0005] Optionally, the motor, the self-locking mechanism, and the cycloidal pinwheel planetary reducer are arranged coaxially along the power flow direction.

[0006] Optionally, the second input shaft is integrally formed with a second shaft portion and a second tooth portion located at its end; the reduction transmission mechanism includes: a first housing, wherein multiple rows of needle rollers are arranged circumferentially on the inner sidewall of the first housing; a crank assembly including at least one input gear meshing with the second tooth portion, and a crankshaft coaxially rotating with the input gear, the crankshaft including a first end and a second end opposite to each other, the crankshaft being provided with a first eccentric wheel and a second eccentric wheel in sequence along the axial direction, the first eccentric wheel and the second eccentric wheel being located between the first end and the second end; a planetary carrier assembly including a first planetary carrier and a planetary carrier connected to each other. The second planetary carrier, wherein the crankshaft is connected to the first planetary carrier and the second planetary carrier, the first planetary carrier is rotatably connected to the first end, the second planetary carrier is rotatably connected to the second end, and the second output shaft is connected to the second planetary carrier; the cycloidal pinwheel assembly includes a first cycloidal pinwheel and a second cycloidal pinwheel, the first cycloidal pinwheel being axially spaced from the second cycloidal pinwheel, the first cycloidal pinwheel being rotatably connected to the first eccentric wheel, and the second cycloidal pinwheel being rotatably connected to the second eccentric wheel, the outer circumferential surfaces of the first cycloidal pinwheel and the second cycloidal pinwheel being in rolling contact with a plurality of the needle rollers.

[0007] Optionally, there are three crankshafts and three input gears. The three crankshafts are arranged at equal intervals along the circumference of the second input shaft, and the three input gears mesh with the second tooth portion along the circumference of the second input shaft.

[0008] Optionally, the inner wall of the first housing is provided with a needle tooth fixing mechanism, which is used to circumferentially and equidistantly embed multiple rows of the roller needles.

[0009] Optionally, the steering assembly further includes an encoder mechanism for detecting the rotation angle and / or rotational speed of the second output shaft; the steering assembly also includes a control device electrically connected to the encoder mechanism.

[0010] Optionally, the encoder mechanism includes: a stator assembly; a rotor assembly connected to the second output shaft and capable of rotating relative to the stator assembly following the second output shaft; a first detection structure is provided between the rotor assembly and the stator assembly for detecting the rotational speed of the rotor assembly.

[0011] Optionally, the encoder mechanism further includes a second housing connected to the housing of the cycloidal pinwheel planetary reducer, wherein the stator assembly and / or the rotor assembly are disposed within the second housing.

[0012] Optionally, the self-locking mechanism further includes a third housing, the third housing having a receiving cavity, the first input component and the first output component both being disposed within the receiving cavity, the receiving cavity having an annular sidewall; the first input component includes a first transmission disk and a first input shaft, the first input shaft being connected to the motor; the first output component includes a second transmission disk and a first output shaft, the first output shaft being connected to the second input shaft, and the second transmission disk being connected to the first transmission disk.

[0013] Optionally, the first input component further includes a shift fork connected to the first transmission disk; the outer edge of the second transmission disk forms an engagement groove, the bottom wall of the engagement groove includes two wedge surfaces spaced apart circumferentially, and a connecting surface connected between the two wedge surfaces; the first input component further includes two rollers, the rollers are located between the wedge surfaces and the annular sidewall, and the rollers are preloaded in the radial direction by an elastic reset member; the shift fork is inserted between the two rollers and is located between the connecting surface and the annular sidewall.

[0014] A second aspect of this utility model provides a steering structure, including a wheel, a suspension body, a steering knuckle, and a steering assembly as described in any of the above optional solutions, wherein the wheel is connected to the steering knuckle, and the steering knuckle is connected to both the suspension body and the steering assembly.

[0015] A third aspect of this utility model provides a vehicle including the steering structure described in the above-mentioned optional solution.

[0016] The steering assembly provided by this invention, through the aforementioned technical solution, connects to the vehicle's steering knuckle via a second output shaft. The steering knuckle is then connected to the wheel. When outputting power, the driving force is transmitted sequentially through the first input component and the first output component of the self-locking mechanism, and then to the second input shaft of the cycloidal pinwheel planetary reducer. After the speed of the driving force is reduced and the torque is increased by the reduction transmission mechanism, it is transmitted to the second output shaft. The second output shaft ultimately transmits the steering power to the vehicle's steering knuckle, which in turn transmits it to the wheel to achieve steering. Furthermore, the cycloidal pinwheel planetary reducer can transmit the second output power through the reduction transmission mechanism. The input shaft speed is reduced and the torque is increased, which is eventually transmitted to the second output shaft to achieve high torque output and improve transmission efficiency. In addition, when the wheel is subjected to external impact and deflects at an angle, the reduction transmission mechanism of the cycloidal pinwheel planetary reducer can also withstand a large impact. Moreover, after the first output component of the self-locking mechanism withstands the reverse torque, it self-locks relative to the first input component, thereby blocking the transmission of reverse torque to the first input component, so as to protect the motor and improve the service life of the motor. Furthermore, the application of the cycloidal pinwheel planetary reducer in this steering assembly can also reduce the overall noise of the steering assembly during operation. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the steering assembly provided in an exemplary embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the cycloidal pinwheel planetary reducer provided in an exemplary embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the cycloidal pinwheel planetary reducer provided in an exemplary embodiment of the present invention, excluding the first housing;

[0021] Figure 4 This is a structural schematic diagram of the cycloidal pinwheel planetary reducer provided in an exemplary embodiment of the present utility model, excluding the first housing.

[0022] Figure 5 This is a structural schematic diagram of the cycloidal pinwheel planetary reducer provided in an exemplary embodiment of this utility model from another perspective;

[0023] Figure 6 This is a schematic diagram of the internal structure of the cycloidal pinwheel planetary reducer provided in an exemplary embodiment of this utility model;

[0024] Figure 7 This is a schematic diagram of the first housing and its internal structure provided in an exemplary embodiment of the present utility model;

[0025] Figure 8 This is a schematic diagram of the self-locking mechanism provided in an exemplary embodiment of this utility model;

[0026] Figure 9 This is a structural schematic diagram of the self-locking mechanism provided in an exemplary embodiment of the present utility model from another perspective;

[0027] Figure 10 This is a schematic diagram of the internal structure of the self-locking mechanism provided in an exemplary embodiment of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Electric motor;

[0030] 2. Self-locking mechanism; 210. First input assembly; 211. First transmission disc; 212. First input shaft; 213. Shift fork; 214. Roller; 215. Elastic reset element; 220. First output assembly; 221. Second transmission disc; 222. First output shaft; 223. Engaging groove; 2231. Wedge surface; 2232. Connecting surface; 230. Third housing; 231. Receiving cavity; 2311. Annular sidewall;

[0031] 3. Cycloidal pinwheel planetary reducer; 310. Second input shaft; 311. Second shaft portion; 312. Second gear portion; 320. Second output shaft; 330. Reduction transmission mechanism; 331. First housing; 3311. Needle roller; 3312. Needle tooth fixing mechanism; 332. Crank assembly; 3321. Input gear; 3322. Crankshaft; 33221. First eccentric wheel; 33222. Second eccentric wheel; 333. Planetary carrier assembly; 3331. First planetary carrier; 3332. Second planetary carrier; 334. Cycloidal pinwheel assembly; 3341. First cycloidal pinwheel; 3342. Second cycloidal pinwheel;

[0032] 4. Encoder mechanism; 410. Second housing; 420. Stator assembly; 430. Rotor assembly;

[0033] 5. Control device; Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] When a vehicle's wheels are subjected to external impacts, they are prone to veering to one side. In related technologies, the vehicle's steering assembly is generally combined by connecting a motor to a planetary gear reducer. The output shaft of the planetary gear reducer is connected to the steering knuckle of the wheel. When the wheel is subjected to an external impact and its angle deflects, the planetary gear reducer cannot maintain stability after the wheel is subjected to abnormal impact under the high torque of reverse acceleration, and it cannot form a self-locking protection mechanism for the motor, which can easily lead to a reduction in the lifespan of the motor.

[0036] Based on the above technical issues, and referring to Figures 1 to 10 As shown, in a first aspect, this utility model provides a steering assembly including a motor 1, a self-locking mechanism, and a cycloidal pinwheel planetary reducer 3. The motor 1 outputs driving force. The self-locking mechanism 2 includes a first input component 210 and a first output component 220. The first input component 210 is connected to the motor 1 and transmits the torque of the motor 1 to the first output component 220. When subjected to reverse torque, the first output component 220 can self-lock relative to the first input component 210 to prevent the reverse torque from being transmitted to the first input component 210. The cycloidal pinwheel planetary reducer 3 includes a second input shaft 310, a second output shaft 320, and a reduction transmission mechanism 330. The second input shaft 310 is coaxially connected to the first output component 220. The reduction transmission mechanism 330 is configured to reduce the rotational speed of the second input shaft 310 and transmit the increased torque to the second output shaft 320.

[0037] Through the above technical solution, namely the steering assembly provided by this utility model, the steering knuckle of the vehicle can be connected to the second output shaft 320, and the steering knuckle is then connected to the wheel. When outputting power, the driving force can be output through the motor 1. The driving force is sequentially transmitted through the first input component 210 and the first output component 220 of the self-locking mechanism 2, and then transmitted to the second input shaft 310 of the cycloidal pinwheel planetary reducer 3. After the speed of the driving force is reduced and the torque is increased by the reduction transmission mechanism 330, it is transmitted to the second output shaft 320. The second output shaft 320 finally transmits the steering power to the steering knuckle of the vehicle, and finally to the wheel to achieve steering. Furthermore, the cycloidal pinwheel planetary reducer 3 can transmit the first input component 210 and the first output component 220 of the self-locking mechanism 2, and then to the second input shaft 310 of the cycloidal pinwheel planetary reducer 3. The rotational speed of the second input shaft 310 is reduced and the torque is increased, which is finally transmitted to the second output shaft 320 to achieve high torque output and improve transmission efficiency. In addition, when the wheel is subjected to external impact and deflects at an angle, the reduction transmission mechanism 330 of the cycloidal pinwheel planetary reducer 3 can also withstand a large impact. Moreover, after the first output component 220 of the self-locking mechanism 2 withstands the reverse torque, it self-locks relative to the first input component 210, thereby blocking the transmission of reverse torque to the first input component 210, so as to protect the motor 1 and improve the service life of the motor 1. In addition, the application of the cycloidal pinwheel planetary reducer 3 in this steering assembly can also reduce the overall noise of the steering assembly during operation.

[0038] It should be noted that the cycloidal pinwheel planetary reducer 3 mentioned in the above specific embodiments, with its design of multiple cycloidal pinwheels and multiple crank shafts, will be described in detail below.

[0039] In some implementations, reference Figure 1 As shown, the motor 1, the self-locking mechanism 2, and the cycloidal pinwheel planetary reducer 3 are arranged coaxially along the power flow direction.

[0040] In this way, the coaxially arranged motor 1, self-locking mechanism 2 and cycloidal pinwheel planetary reducer 3 can minimize the torque transmission path during power transmission, thereby improving the power transmission efficiency of the steering assembly.

[0041] In some implementations, reference Figures 2 to 7 As shown, the second input shaft 310 is integrally formed with a second shaft portion 311 and a second tooth portion 312 located at its end; the speed reduction transmission mechanism 330 includes a first housing 331, a crank assembly 332, a planetary carrier assembly 333, and a cycloidal pinwheel assembly 334.

[0042] Among them, reference Figure 7As shown, multiple rows of needle rollers 3311 are arranged circumferentially on the inner wall of the first housing 331, and a needle tooth fixing mechanism 3312 is provided on the inner wall of the first housing 331. The needle tooth fixing mechanism 3312 is used to circumferentially and equidistantly embed the multiple rows of needle rollers 3311.

[0043] The crank assembly 332 includes at least one input gear 3321 meshing with the second tooth portion 312, and a crankshaft 3322 coaxially rotating with the input gear 3321. The crankshaft 3322 includes a first end and a second end opposite to each other. The crankshaft 3322 is provided with a first eccentric wheel 33221 and a second eccentric wheel 33222 in sequence along the axial direction. The first eccentric wheel 33221 and the second eccentric wheel 33222 are located between the first end and the second end, and the phase difference between the first eccentric wheel 33221 and the second eccentric wheel 33222 is 180°.

[0044] The planetary carrier assembly 333 includes a first planetary carrier 3331 and a second planetary carrier 3332 that are connected to each other. The crankshaft 3322 is connected to the first planetary carrier 3331 and the second planetary carrier 3332 via roller bearings. The first planetary carrier 3331 is rotatably connected to the first end, and the second planetary carrier 3332 is rotatably connected to the second end. The second output shaft 320 is connected to the second planetary carrier 3332.

[0045] Cycloidal pinwheel assembly 334 includes a first cycloidal pinwheel 3341 and a second cycloidal pinwheel 3342. The first cycloidal pinwheel 3341 is axially spaced from the second cycloidal pinwheel 3342. The first cycloidal pinwheel 3341 is rotatably connected to a first eccentric wheel 33221 via roller bearings, and the second cycloidal pinwheel 3342 is also rotatably connected to a second eccentric wheel 33222 via roller bearings. The outer surfaces of the first cycloidal pinwheel 3341 and the second cycloidal pinwheel 3342 are parallel to each other. Multiple rollers 3311 roll in close contact, and the first cycloidal pinwheel 3341 and the second cycloidal pinwheel 3342 are also arranged with a 180° phase offset in the circumferential direction, which is similar to the 180° phase difference between the first eccentric wheel 33221 and the second eccentric wheel 33222. Through this arrangement, the inertial forces between the first cycloidal pinwheel 3341 and the second cycloidal pinwheel 3342 can be self-balanced during their simultaneous revolution and rotation.

[0046] The above scheme details the reduction transmission mechanism 330 of the cycloidal pinwheel planetary reducer 3. When power is transmitted through this cycloidal pinwheel planetary reducer 3, the second input shaft 310 first receives power from the first output component 220 and begins to rotate. The second shaft 311 and the second gear 312 rotate synchronously. When the second gear 312 rotates, it drives at least one input gear 3321 meshing with it to rotate synchronously. The rotation of the input gear 3321 drives the crankshaft 3322 to revolve and rotate. The first eccentric wheel 33221 and the second eccentric wheel 33222 rotate eccentrically around their own rotation centers. The first eccentric wheel 33221 is rotatably connected to the first cycloidal pinwheel 3341 via roller bearings, and the second eccentric wheel 33222 is also rotatably connected to the second cycloidal pinwheel 3342 via roller bearings. Furthermore, the outer circumferences of the first cycloidal pinwheel 3341 and the second cycloidal pinwheel 3342 are respectively connected to multiple needle rollers 331. 1. Rolling contact: When the first eccentric wheel 33221 and the second eccentric wheel 33222 make eccentric movements, they will also drive the first cycloidal pinwheel 3341 and the second cycloidal pinwheel 3342 to rotate and revolve around their own rotation center at the same time. At this time, the first cycloidal pinwheel 3341 and the second cycloidal pinwheel 3342 can achieve deceleration. Multiple pin holes can be arranged at intervals on the circumference of the second cycloidal pinwheel 3342. The flange of the second planetary carrier 3332 can be provided with short columns that can be inserted into multiple pin holes and rotate synchronously with the rotation of the second cycloidal pinwheel 3342. The second planetary carrier 3332 is fixedly connected to the second output shaft 320 to realize the power transmission between the second cycloidal pinwheel 3342 and the second output shaft 320. The rotation of the second cycloidal pinwheel 3342 will drive the second output shaft 320 to rotate. The rotation speed of the second cycloidal pinwheel 3342 is the output speed of the second output shaft 320. In this way, the deceleration and torque increase operation is realized.

[0047] It should be noted that the number of crankshaft 3322 and input gear 3321 mentioned in the above specific embodiments can be any suitable number. That is, if there is sufficient space inside the cycloidal pinwheel planetary reducer 3, the crankshaft 3322 and input gear 3321 can be arranged in three, four, five or other suitable numbers, as long as the number of crankshaft 3322 and input gear 3321 corresponds one-to-one.

[0048] In some specific implementation methods, refer to Figures 2 to 6 As shown, there are three crankshafts 3322 and three input gears 3321. The three crankshafts 3322 are arranged at equal intervals along the circumference of the second input shaft 310, and the three input gears 3321 mesh with the second tooth portion 312 along the circumference of the second input shaft 310.

[0049] By distributing the power transmitted by the second input shaft 310 around the circumference of the second input shaft 310 through the three crankshafts 3322 and the three input gears 3321 as described above, the power transmitted by the second input shaft 310 can be distributed more stably, and the power can be transmitted more stably through the three input gears 3321 during the transmission process.

[0050] In some implementations, reference Figure 1 As shown, the steering assembly also includes an encoder mechanism 4, which can be used to detect the rotation angle and / or speed of the second output shaft 320; the steering assembly also includes a control device 5, which is electrically connected to the encoder mechanism 4.

[0051] Through the above technical solution, the encoder mechanism 4 can detect the rotation angle and / or speed of the second output shaft 320 and transmit the detected rotation angle and / or speed to the control device 5 in the form of an electrical signal. The control device 5 also receives the rotation angle and / or speed of the motor 1. Since the rotation angle and / or speed of the second output shaft 320 and the motor 1 are usually in a standard ratio, the control device 5 can summarize and analyze the rotation angle and / or speed of the motor 1 and the second output shaft 320. In the power transmission path, there will inevitably be rotational backlash, which will cause a loss of power transmission. This may easily lead to the rotation angle or speed of the second output shaft 320 not conforming to the preset value. The control device 5 can transmit the rotation angle or speed of the second output shaft 320. When the rotation angle or speed of the second output shaft 320 does not conform to the preset value, the control device 5 can send a signal to make the motor 1 slightly increase its own rotation angle or speed to compensate for the lost rotation angle or speed.

[0052] In some implementations, reference Figure 5 As shown, the encoder mechanism 4 includes a stator assembly 420 and a rotor assembly 430. The rotor assembly 430 is connected to the second output shaft 320 and can rotate relative to the stator assembly 420 following the second output shaft 320. A first detection structure is provided between the rotor assembly 430 and the stator assembly 420 to detect the rotational speed of the rotor assembly 430.

[0053] With the above scheme, when the second output shaft 320 rotates, it can drive the rotor assembly 430 to rotate synchronously. At this time, the angular velocity of the second output shaft 320 and the rotor assembly 430 is the same. The real-time rotational speed of the rotor assembly 430 can be detected by the first detection structure between the rotor assembly 430 and the stator assembly 420, and the real-time rotational speed of the second output shaft 320 can be directly obtained.

[0054] It should be noted that the first detection structure mentioned in the above embodiment can be a chip and sensor structure located between the rotor assembly 430 and the stator assembly 420. In order to ensure the stability of the sensor and chip arrangement, the sensor and chip can be arranged on the stator assembly 420, and an electromagnet capable of sensing the signals of the sensor and chip is provided on the rotor assembly 430. When the rotor assembly 430 rotates, the rotation amount of the electromagnet will be transmitted to the sensor and chip of the stator assembly 420, and then the signal will be transmitted to the control device 5 through the chip.

[0055] In some implementations, combined Figure 1 and Figure 5 As shown, the encoder mechanism 4 also includes a second housing 410, which is connected to the housing of the cycloidal pinwheel planetary reducer 3. The stator assembly 420 and / or the rotor assembly 430 are disposed within the second housing 410.

[0056] Through the above solution, the second housing 410 can provide a receiving space for the stator assembly 420 and / or the rotor assembly 430, and can protect the stator assembly 420 and / or the rotor assembly 430, thereby reducing or preventing external dirt from seeping into the stator assembly 420 or the rotor assembly 430 and affecting the rotation detection result of the second output shaft 320. The second housing 410 can also protect the stator assembly 420 and / or the rotor assembly 430 to prevent external impacts.

[0057] In some implementations, reference Figure 1 , Figure 8 , Figure 9 and Figure 10 As shown, the self-locking mechanism 2 also includes a third housing 230, which has a receiving cavity 231. The first input component 210 and the first output component 220 are both located in the receiving cavity 231, which has an annular sidewall 2311. The first input component 210 includes a first transmission disk 211 and a first input shaft 212, which is connected to the motor 1. The first output component 220 includes a second transmission disk 221 and a first output shaft 222, which is connected to the second input shaft 310, and the second transmission disk 221 is connected to the first transmission disk 211.

[0058] With the above scheme, the first input shaft 212 can be connected to the output end of the motor 1, the first transmission disk 211 is connected to the second transmission disk 221, and the power can be transmitted to the cycloidal pinwheel planetary reducer 3 through the first output shaft 222 to realize power transmission.

[0059] Furthermore, in order to achieve reverse self-locking between the first input component 210 and the first output component 220, reference can be made to... Figure 10As shown, the first input component 210 further includes a shift fork 213 connected to the first transmission disk 211; the outer edge of the second transmission disk 221 forms an engagement groove 223, the bottom wall of the engagement groove 223 includes two wedge surfaces 2231 spaced apart in the circumferential direction, and a connecting surface 2232 connecting the two wedge surfaces 2231; the first input component 210 further includes two rollers 214, the rollers 214 are located between the wedge surfaces 2231 and the annular sidewall 2311, and the rollers 214 are provided with preload in the radial direction by the elastic reset member 215; the shift fork 213 can be inserted between the two rollers 214 and is located between the connecting surface 2232 and the annular sidewall 2311.

[0060] The above scheme enables the reverse self-locking function of the first input component 210 and the first output component 220, which can also be understood as the basic operating mode of a bidirectional overrunning clutch, i.e. Figure 10 As shown, when the first transmission disc 211 and the second transmission disc 221 are relatively stationary, the two elastic reset members 215 on both sides of the shift fork 213 will respectively push the two rollers 214 on both sides of the shift fork 213 (to... Figure 10 (Taking the two rollers 214 and two elastic reset members 215 in the upper left of the middle view as an example) so that the sidewalls of the rollers 214 can respectively fit between the wedge surface 2231 and the annular sidewall 2311, and the rollers 214 remain stationary. For example, when the first transmission disc 211 drives the shift fork 213 to rotate clockwise, the shift fork 213 will first fit against the right roller 214, and with the rotation of the first transmission disc 211, push the roller 214 to compress the right elastic reset member 215. At this time, the right roller 214 is no longer held by the wedge surface 2231 and the annular sidewall 2311. After the elastic reset member 215 is compressed, it will drive the second transmission disc 221 to rotate clockwise. At the same time, when the left elastic reset member 215 rotates clockwise with the second transmission disc 221, under the condition of relative motion, the left roller 214 will also compress the left elastic reset member 215. This causes the left roller 214 to tend to rotate counterclockwise relative to the first transmission disc 211. At this time, the left roller 214 is no longer held by the wedge surface 2231 and the annular sidewall 2311. The first transmission disc 211 can rotate clockwise, which in turn can drive the second transmission disc 221 to rotate clockwise as well. When the second transmission disc 221 tends to rotate counterclockwise, the elastic reset member 215 on the left side of the shift fork 213 will elastically reset, which will drive the left roller 214 to approach the shift fork 213. At this time, the left roller 214 will be held by the wedge surface 2231 and the annular sidewall 2311 respectively as it approaches the shift fork 213. That is, the roller 214 limits the rotation of the second transmission disc 221 by adhering to the annular sidewall 2311 and the wedge surface 2231 respectively. At this time, the second transmission disc 221 is locked and cannot rotate.

[0061] Furthermore, by using the above-mentioned scheme, namely the combination of the cycloidal pinwheel planetary reducer 3 and the self-locking mechanism 2, the layout space of the steering assembly can be saved to the maximum extent. When the steering assembly is applied to a vehicle, the overall layout space of the vehicle can be further optimized.

[0062] It should be noted that the above method is only an example of the situation where the first transmission disc 211 drives the shift fork 213 to rotate clockwise and the second transmission disc 221 has a tendency to rotate counterclockwise and is locked. Those skilled in the art can also clearly understand the opposite method through the above solution, that is, the situation where the first transmission disc 211 drives the shift fork 213 to rotate counterclockwise and the second transmission disc 221 has a tendency to rotate clockwise and is locked. This utility model will not elaborate further on this.

[0063] A second aspect of this utility model provides a steering structure, including a wheel, a suspension body, a steering knuckle, and the components mentioned in the above-described specific embodiments. Figures 1 to 10 The example steering assembly possesses all the beneficial effects described in the above-described embodiments. The wheel can be connected to the steering knuckle, which in turn can be connected to the suspension body and the steering assembly. Specifically, the steering knuckle can be connected to the second output shaft 320 of the steering assembly to transmit the driving force output from the motor 1 to the steering knuckle, ultimately driving the wheel to steer. Furthermore, when the wheel is subjected to external impact, the cycloidal pinwheel planetary reducer 3 and the self-locking mechanism 2 can maintain stability after abnormal impact, thus forming a better self-locking protection mechanism for the motor 1 and improving its service life. In addition, this steering structure can also achieve the noise reduction function described in the above embodiments through the cycloidal pinwheel planetary reducer 3 in the steering assembly. Moreover, the cooperation between the cycloidal pinwheel planetary reducer 3 and the self-locking mechanism 2 can also optimize the overall vehicle layout space as described in the above embodiments and improve transmission efficiency. Since the above-described beneficial effects have been detailed in the various embodiments described above, this utility model will not elaborate further here.

[0064] A third aspect of this invention provides a vehicle that includes the steering structure mentioned in the above embodiments, and the vehicle also has all the beneficial effects described in the above specific embodiments.

[0065] The aforementioned vehicles can be pure electric vehicles, plug-in hybrid vehicles, range-extended vehicles, or fuel vehicles among new energy vehicles; this utility model does not specifically limit them in this regard.

[0066] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of protection claimed by the present invention.

Claims

1. A steering assembly, characterized in that, include: Motor (1), used to output driving force; The self-locking mechanism (2) includes a first input component (210) and a first output component (220). The first input component (210) is connected to the motor (1) and transmits the torque of the motor (1) to the first output component (220). When the first output component (220) is subjected to reverse torque, it can self-lock relative to the first input component (210) to block the transmission of reverse torque to the first input component (210). The cycloidal pinwheel planetary reducer (3) includes a second input shaft (310), a second output shaft (320), and a reduction transmission mechanism (330). The second input shaft (310) is coaxially connected to the first output assembly (220). The reduction transmission mechanism (330) is configured to reduce the rotational speed of the second input shaft (310) and transmit the increased torque to the second output shaft (320).

2. The steering assembly according to claim 1, characterized in that, The motor (1), the self-locking mechanism (2), and the cycloidal pinwheel planetary reducer (3) are arranged coaxially along the power flow direction.

3. The steering assembly according to claim 1, characterized in that, The second input shaft (310) is integrally formed with a second shaft portion (311) and a second tooth portion (312) located at its end; The speed reduction transmission mechanism (330) includes: The first housing (331) has multiple rows of needle rollers (3311) arranged circumferentially on the inner sidewall of the first housing (331); The crank assembly (332) includes at least one input gear (3321) meshing with the second tooth (312), and a crankshaft (3322) coaxially rotating with the input gear (3321). The crankshaft (3322) includes a first end and a second end opposite to each other. The crankshaft (3322) is provided with a first eccentric wheel (33221) and a second eccentric wheel (33222) in sequence along the axial direction. The first eccentric wheel (33221) and the second eccentric wheel (33222) are located between the first end and the second end. The planetary carrier assembly (333) includes a first planetary carrier (3331) and a second planetary carrier (3332) connected to each other. The crankshaft (3322) is connected to the first planetary carrier (3331) and the second planetary carrier (3332) via bearings. The first planetary carrier (3331) is rotatably connected to the first end, and the second planetary carrier (3332) is rotatably connected to the second end. The second output shaft (320) is connected to the second planetary carrier (3332). The cycloidal pinwheel assembly (334) includes a first cycloidal pinwheel (3341) and a second cycloidal pinwheel (3342). The first cycloidal pinwheel (3341) is axially spaced from the second cycloidal pinwheel (3342). The first cycloidal pinwheel (3341) is rotatably connected to the first eccentric wheel (33221), and the second cycloidal pinwheel (3342) is rotatably connected to the second eccentric wheel (33222). The outer circular surfaces of the first cycloidal pinwheel (3341) and the second cycloidal pinwheel (3342) roll and fit against a plurality of the rollers (3311).

4. The steering assembly according to claim 3, characterized in that, The number of crankshafts (3322) and input gears (3321) are both three. The three crankshafts (3322) are arranged at equal intervals along the circumference of the second input shaft (310), and the three input gears (3321) mesh with the second tooth portion (312) along the circumference of the second input shaft (310).

5. The steering assembly according to claim 3, characterized in that, The inner wall of the first housing (331) is provided with a needle tooth fixing mechanism (3312), which is used to embed multiple rows of the roller needles (3311) circumferentially at equal intervals.

6. The steering assembly according to any one of claims 2 to 4, characterized in that, The steering assembly also includes an encoder mechanism (4) for detecting the rotation angle and / or rotational speed of the second output shaft (320); The steering assembly also includes a control device (5) which is electrically connected to the encoder mechanism (4).

7. The steering assembly according to claim 6, characterized in that, The encoder mechanism (4) includes: Stator assembly (420); A rotor assembly (430) is connected to the second output shaft (320) and is able to rotate relative to the stator assembly (420) along with the second output shaft (320); a first detection structure is provided between the rotor assembly (430) and the stator assembly (420) to detect the rotational speed of the rotor assembly (430).

8. The steering assembly according to claim 7, characterized in that, The encoder mechanism (4) further includes a second housing (410), which is connected to the outer shell of the cycloidal pinwheel planetary reducer (3), and the stator assembly (420) and / or the rotor assembly (430) are disposed within the second housing (410).

9. The steering assembly according to claim 1, characterized in that, The self-locking mechanism (2) further includes a third housing (230), which has a receiving cavity (231) inside. The first input component (210) and the first output component (220) are both located in the receiving cavity (231), and the receiving cavity (231) has an annular sidewall (2311). The first input component (210) includes a first transmission disk (211) and a first input shaft (212), the first input shaft (212) being connected to the motor (1); The first output component (220) includes a second transmission disk (221) and a first output shaft (222), the first output shaft (222) being connected to the second input shaft (310), and the second transmission disk (221) being connected to the first transmission disk (211).

10. The steering assembly according to claim 9, characterized in that, The first input component (210) also includes a shift fork (213) connected to the first transmission disk (211); The outer edge of the second transmission disk (221) is formed with a meshing groove (223). The bottom wall of the meshing groove (223) includes two wedge surfaces (2231) spaced apart in the circumferential direction, and a connecting surface (2232) connecting the two wedge surfaces (2231). The first input component (210) further includes two rollers (214) located between the wedge surface (2231) and the annular sidewall (2311), and the rollers (214) are provided with preload in the radial direction by an elastic reset member (215); The fork (213) is inserted between the two rollers (214) and is located between the connecting surface (2232) and the annular sidewall (2311).

11. A steering structure, characterized in that, The system includes a wheel, a suspension body, a steering knuckle, and a steering assembly as described in any one of claims 1-10, wherein the wheel is connected to the steering knuckle, and the steering knuckle is connected to both the suspension body and the steering assembly.

12. A vehicle, characterized in that, Includes the steering structure as described in claim 11.

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