Steering gear of a vehicle and vehicle

Abstract

The application provides a vehicle steering gear and a vehicle, and the vehicle steering gear comprises an identification and transmission module, a deceleration reversing module and a power-assisted and deceleration module; the identification and transmission module has the functions of identifying angle / torque information, converting the information into an electric signal and adjusting the steering force; the deceleration reversing module adopts a worm gear transmission, can decelerate and increase torque, and changes the direction of torque output; the power-assisted and deceleration module can receive a steering electric signal, control a motor to provide power assistance, and the worm gear transmission can decelerate and increase torque; the modules are mechanically connected through splines. The application changes the traditional circulating ball transmission structure of the steering gear of a commercial vehicle into a worm gear transmission structure, can improve the bearing capacity of the mechanical structure, replaces the traditional hydraulic power assistance with pure electric power assistance, and increases the identification and transmission module in the steering gear to adjust the number of turns of the steering wheel and the steering force. The steering gear has the advantages of pure electric power assistance, simple structure, high fuel economy, light steering, support for intelligent driving and the like, and enables the driver to have a better driving experience.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a vehicle steering system and a vehicle having the steering system. Background Technology

[0002] In related technologies, most existing commercial vehicle steering gear deceleration and reversing modules adopt a recirculating ball structure, and their power assist mode is mainly hydraulic power assist. However, hydraulic power assist has many shortcomings, such as complex structure, heavy or floating feel, low fuel economy, abnormal noise and oil leakage. Pure electric power assist can perfectly solve these problems, but the traditional recirculating ball internal structure has low load-bearing capacity and short life. Summary of the Invention

[0003] In view of this, the present invention aims to propose a pure electric power steering system that can be used in medium and heavy vehicles and can output high torque. This steering system has the advantages of simple structure, high fuel economy, light and adjustable feel, and support for intelligent driving, which can give the driver a better driving experience.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A vehicle steering system includes: an identification and transmission module adapted to be connected to the vehicle's steering wheel for identifying steering information of the steering wheel and converting the steering information into an electrical signal output; a deceleration and reversing module, which is a worm gear drive used for reversing and reducing torque of the steering system, the deceleration and reversing module including: a worm and a rocker arm shaft assembly, the outer circumferential surface of the worm having a first meshing tooth, the rocker arm shaft assembly having a second meshing tooth meshing with the first meshing tooth, the rocker arm shaft assembly being adapted to output torque to drive the vehicle to steer; and a power assist and deceleration module, which includes a motor, a controller, and a deceleration mechanism, the power assist and deceleration module being connected to the worm gear drive of the deceleration and reversing module and communicatively connected to the identification and transmission module, the power assist and deceleration module receiving the electrical signal and controlling the motor to provide power assist to drive the worm gear to rotate.

[0005] In some examples of the present invention, the identification and transmission module includes: a sensor, a torsion bar, an input shaft and an input bevel gear shaft, an input bevel gear ring, an intermediate bevel gear, an output shaft, and a first housing; the sensor is placed on the relatively rotatable input shaft and the input bevel gear shaft and is communicatively connected to the controller of the power assist and deceleration module, for detecting the angular difference between the input shaft and the input bevel gear shaft and generating the electrical signal according to the angular difference, and the sensor is adapted to transmit the electrical signal to the power assist and deceleration module.

[0006] In some examples of the present invention, the input bevel gear shaft is coaxially arranged with the output shaft, the intermediate bevel gear is angled to the input bevel gear shaft and the output shaft, and is rotatably mounted on the first housing; the input bevel gear ring is sleeved on the outside of the input bevel gear shaft, the input bevel gear ring and the intermediate bevel gear rotate around their respective central axes, the intermediate bevel gear and the output shaft rotate around their respective central axes, the input shaft driven by the driver is adapted to drive the torsion bar to rotate and the input bevel gear shaft to rotate, and the output shaft can be connected to the deceleration and reversing module or the power assist and deceleration module.

[0007] In some examples of the present invention, there is at least one intermediate bevel gear and it is arranged between the input bevel gear ring and the output shaft.

[0008] In some examples of the present invention, the first housing includes: a housing body and a middle bevel gear base, the middle bevel gear base being mounted on the housing body, and the middle bevel gear being mounted on the middle bevel gear base.

[0009] In some examples of the present invention, the deceleration and reversing module includes a deceleration and reversing housing, which is divided into an upper deceleration and reversing housing and a lower deceleration and reversing housing, and the lower deceleration and reversing housing has a limiting structure.

[0010] In some examples of the present invention, there is at least one worm gear, and the worm gear is arranged on the circumferential side of the deceleration and reversing housing.

[0011] In some examples of the present invention, the worm gear drive of the deceleration and reversing module is a toroidal worm gear drive.

[0012] In some examples of the present invention, the rocker arm shaft assembly of the deceleration and reversing module is a split structure. The rocker arm shaft assembly includes a rocker arm shaft, a worm gear, and a clearance adjustment assembly. The second meshing tooth is disposed on the worm gear. The worm gear is connected to the rocker arm shaft of the deceleration and reversing module. The outer peripheral sidewall of the rocker arm shaft is provided with a mounting groove recessed towards the rocker arm shaft. The end of the worm gear away from the worm is provided with a connecting part. The connecting part is installed in the mounting groove and connected to the rocker arm shaft.

[0013] In some examples of the present invention, the bottom of the mounting groove of the rocker arm shaft has a first clearance groove and a second clearance groove.

[0014] In some examples of the present invention, the gap adjustment assembly includes a spring and an elastically deformable elastic pad; the elastic pad is placed in the first clearance groove, and the spring is placed in the second clearance groove; the thickness of the elastic pad after compression is greater than the depth of the first clearance groove.

[0015] In some examples of the present invention, the connecting portion of the worm gear has a wear-resistant coating.

[0016] In some examples of the present invention, there is at least one power assist and deceleration module, which is communicatively connected to the identification and transmission module, and the power assist and deceleration module is drive-connected to the deceleration and reversing module.

[0017] Compared with existing technologies, the vehicle steering system of the present invention has the following advantages: The vehicle steering system according to the present invention, by using a reduction and reversing module with a worm gear and rocker arm shaft assembly, enables the steering system to have the steering capability of a pure electric power-assisted medium and heavy truck, and has advantages such as simple structure, high fuel economy, light and adjustable feel, and support for intelligent driving. This can provide the driver with a better driving experience.

[0018] Another object of the present invention is to provide a vehicle.

[0019] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A vehicle comprising the steering system of the aforementioned vehicle.

[0020] The steering system of the vehicle described above has the same advantages over the prior art, and will not be repeated here. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the steering system according to an embodiment of the present invention; Figure 2 This is an exploded view of the steering gear described in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the steering gear described in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the deceleration and reversing module described in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the deceleration and reversing module described in an embodiment of the present invention from another angle; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 for Figure 5 Enlarged view of point B in the middle; Figure 8 This is a schematic diagram of the second housing as described in an embodiment of the present invention; Figure 9This is a cross-sectional view of a portion of the structure of the deceleration and commutation module described in an embodiment of the present invention; Figure 10 This is a schematic diagram of the worm gear described in an embodiment of the present invention; Figure 11 This is a schematic diagram of the identification and transmission module described in an embodiment of the present invention; Figure 12 This is a cross-sectional view of the identification and transmission module described in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures: Steering gear 100; Identification and transmission module 10; input shaft assembly 101; output shaft 102; torsion bar 103; input shaft 104; input bevel gear shaft 105; input bevel gear ring 106; intermediate bevel gear 107; first housing 108; sensor 109; housing body 110; intermediate bevel gear base 111; end cover 112; anti-wear bearing 113; Reduction and reversing module 20; worm gear 201; worm wheel assembly 202; first meshing tooth 203; second meshing tooth 204; rocker arm shaft 205; worm wheel 206; mounting groove 207; connecting part 208; clearance groove 209; clearance adjustment assembly 210; elastic pad 211; spring 212; second housing 214; anti-wear coating 215; position adjustment assembly 216; limiting structure 217; adjusting bolt 218; adjusting plug 219; follower bearing 220; upper reduction and reversing housing 221; lower reduction and reversing housing 222; first clearance groove 223; second clearance groove 224; front cover 225; rear cover 226; Assist and deceleration module 30; motor 301; deceleration mechanism 302; controller 303. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1-12As shown, according to an embodiment of the present invention, a vehicle steering gear 100 is disposed in the vehicle. The steering gear 100 can be connected to the vehicle's tie rod via a drop arm. The steering gear 100 is used to control the vehicle to drive left or right, thereby adjusting the vehicle's driving direction. The steering gear 100 includes: an identification and transmission module 10, a power assist and deceleration module 30, and a deceleration and reversing module 20. The identification and transmission module 10 is adapted to be connected to the vehicle's steering wheel. The driver can input a first torque, a first rotation angle, and a rotation direction to the identification and transmission module 10 via the steering wheel. The identification and transmission module 10 is used to identify the above steering information and convert the steering information into an electrical signal output. The power assist and deceleration module 30 has a motor 301, a controller 303, and a deceleration mechanism 302. The power assist and deceleration module 30 can receive electrical signals, determine the vehicle's rotation direction and rotation angle, and control the motor 301 to provide the required power assist. The deceleration and reversing module 20 is used to receive the assistance from the power assist and deceleration module 30, decelerate and reverse, and output the torque required to drive the vehicle to steer. It achieves vehicle steering by connecting to the vehicle's rocker arm, tie rod, etc.

[0026] It should be noted that steering information can be one or more of the following: the first torque of the steering wheel, the first rotation angle, and the direction of rotation.

[0027] In some embodiments of the present invention, the identification and transmission module 10 includes an input shaft assembly 101 and an output shaft 102. The input shaft assembly 101 is drive-connected to the output shaft 102 of the identification and transmission module 10, and the input shaft assembly 101 and the output shaft 102 of the identification and transmission module 10 are coaxially arranged. The input shaft assembly 101 can rotate about its central axis, and the output shaft 102 can rotate about its central axis. By making the input shaft assembly 101 and the output shaft 102 coaxial, they can rotate about the same axis. The torque input direction of the identification and transmission module 10 is consistent with the torque output direction, which can improve the stability of the movement of each component in the identification and transmission module 10, and enhance its safety and lifespan.

[0028] In some embodiments of the present invention, such as Figure 3 , Figure 11 , Figure 12As shown, the input shaft assembly 101 includes: a torsion bar 103, an input shaft 104, a sensor 109, and an input bevel gear shaft 105. The torsion bar 103 can be torsionalally deformed. The input shaft 104 is sleeved on the outside of the torsion bar 103. Specifically, the input shaft 104 has an axial through hole, and at least a portion of the structure of the torsion bar 103 can extend into the through hole. One end of the torsion bar 103 is fixedly connected to the input shaft 104, and the other end of the torsion bar 103 is fixedly connected to the input bevel gear shaft 105. The input shaft 104, driven by the driver, is adapted to drive the torsion bar 103 to rotate and the input bevel gear shaft 105 to rotate. The output shaft 102 can be connected to the deceleration reversing module 20 or the power assist and deceleration module 30 for transmission.

[0029] The sensor 109 is mounted on the relatively rotatable input shaft 104 and input bevel gear shaft 105 and is communicatively connected to the controller 303 of the power assist and deceleration module 30. In some embodiments, the torsion bar 103 and the input shaft 104, and the torsion bar 103 and the input bevel gear shaft 105, can be connected by a spline. In other embodiments, the torsion bar 103 and the input shaft 104, and the torsion bar 103 and the input bevel gear shaft 105, can be connected by a fixing pin.

[0030] The sensor 109 has the function of detecting angle difference. When the input shaft 105 and the input bevel gear shaft 105 have an angle difference, the sensor 109 can identify this angle difference, calculate the torque and determine the direction based on this angle difference, and convert this angle, torque and direction information into an electrical signal and output it to the controller 303 of the power assist and deceleration module 30.

[0031] In some embodiments of the present invention, such as Figure 3 , Figure 12 As shown, the identification and transmission module 10 also includes an input bevel gear ring 106 and an intermediate bevel gear 107. The input bevel gear ring 106 can be sleeved on the outside of the input bevel gear shaft 105. The input bevel gear ring 106 has a third meshing tooth. When it is difficult to machine the third meshing tooth on the surface of the input bevel gear shaft 105, the machining difficulty of the identification and transmission module 10 can be reduced by machining the third meshing tooth on the input bevel gear ring 106 and sleeved on the outside of the input bevel gear shaft 105. The output shaft 102 is provided with a fourth meshing tooth, and the intermediate bevel gear 107 is provided with a fifth meshing tooth. The input bevel gear ring 106 and the intermediate bevel gear 107 rotate around their respective central axes, and the intermediate bevel gear 107 and the output shaft 102 rotate around their respective central axes.

[0032] The output shaft 102 and the input bevel gear shaft 105 are coaxially arranged, meaning the input and output of the bevel gear transmission are coaxial. The fifth meshing tooth of the intermediate bevel gear 107 meshes with the fourth and third meshing teeth, thereby indirectly connecting the output shaft 102 and the input bevel gear shaft 105 through the intermediate bevel gear 107. Thus, the torque and rotation angle input from the input shaft assembly 101 to the identification and transmission module 10 can be sequentially output to the outside of the identification and transmission module 10 via the intermediate bevel gear 107 and the output shaft 102.

[0033] In some embodiments of the present invention, the intermediate bevel gear 107 is angled to the input bevel gear ring 106 and the output shaft 102, such that the total transmission ratio between the input bevel gear ring 106 and the output shaft 102 is less than 1. That is, when the steering wheel inputs a first angle to the recognition and transmission module 10, the output shaft 102 of the recognition and transmission module 10 outputs a second angle, which is greater than the first angle. Thus, by adjusting the total transmission ratio, the number of steering wheel rotations input can be adjusted, allowing the driver to have a suitable number of steering wheel rotations. In some embodiments of the present invention, such as Figure 12 As shown, the identification and transmission module 10 may further include: a first housing 108, an intermediate bevel gear 107, an output shaft 102, and an input bevel gear ring 106 rotatably mounted on the first housing 108.

[0034] Furthermore, the first housing 108 may include a housing body 110, a middle bevel gear base 111, and an end cap 112. The middle bevel gear base 111 is mounted on the housing body 110, and the middle bevel gear 107 is mounted on the middle bevel gear base 111, which facilitates manufacturing and assembly.

[0035] In some embodiments of the present invention, the first housing 108 is provided with an anti-wear bearing 113, and the intermediate bevel gear 107, the output shaft 102, and the input bevel gear ring 106 are mounted on the anti-wear bearing 113, so that the transmission is smoother and the service life of the steering gear 100 can be extended.

[0036] Furthermore, the identification and transmission module 10 may be provided with one or more intermediate bevel gears 107. The intermediate bevel gears 107 are all connected between the output shaft 102 and the input bevel gear ring 106. The intermediate bevel gears 107 may be arranged sequentially at intervals along the circumferential direction of the identification and transmission module 10. This can further improve the stability of the movement of each component in the identification and transmission module 10, thereby extending the service life of the identification and transmission module 10.

[0037] In some embodiments of the present invention, such as Figure 1 , Figure 3 As shown, the output shaft 102 of the identification and transmission module 10 is connected to the deceleration and assist module 30 by splines and bolts.

[0038] In some embodiments of the present invention, the assist and deceleration module 30 includes a deceleration mechanism 302 with a worm gear, a motor 301, and a controller 303. The controller 303 can receive the electrical signal and control the motor 301 to provide assistance, while the deceleration mechanism 302 can reduce speed and increase torque output.

[0039] In some embodiments of the present invention, such as Figure 1 , Figure 3 As shown, the power assist and deceleration module 30 is connected to the worm gear 201 of the deceleration and reversing module 20 by splines and bolts.

[0040] Furthermore, there is at least one power assist and deceleration module 30. For example, when there is only one power assist and deceleration module 30, it can be placed between the identification and transmission module 10 and the deceleration and reversing module 20, or it can be placed on the other side of the deceleration and reversing module 20. Figure 2 In the embodiment shown, there can be two power steering and deceleration modules 30. One power steering and deceleration module 30 is connected between the identification and transmission module 10 and the deceleration and reversing module 20, and the other is located on the other side of the deceleration and reversing module 20. The two can work together to reduce the output torque of the steering gear 100. There can also be more than two power steering and deceleration modules 30, which will be described later.

[0041] In some embodiments of the present invention, the deceleration and reversing module 20 includes a worm gear 201 and a rocker arm shaft assembly 202. The outer peripheral surface of the worm gear 201 has a first meshing tooth 203, and the rocker arm shaft assembly 202 has a second meshing tooth 204 that meshes with the first meshing tooth 203. The rocker arm shaft assembly 202 is adapted to output torque to drive the vehicle to steer. The rocker arm shaft assembly 202 and the worm gear 201 can be configured as a worm gear transmission mechanism.

[0042] Furthermore, the worm gear transmission mechanism can be an enveloping toroidal worm gear transmission. It should be noted that the enveloping toroidal worm gear transmission has a greater load-bearing capacity than the ordinary worm gear transmission, enabling the steering gear 100 to output greater torque.

[0043] In some embodiments of the present invention, such as Figures 3-5 , Figure 10As shown, the rocker arm shaft assembly 202 includes a rocker arm shaft 205, a worm gear 206, and a clearance adjustment assembly 210. A second meshing tooth 204 is disposed on the worm gear 206, meaning the worm 201 can mesh with the worm gear 206. The second meshing tooth 204 is located on the circumferential outer wall of the worm gear 206. The outer circumferential sidewall of the rocker arm shaft 205 has a recessed mounting groove 207. The worm gear 206 has a protruding connecting portion 208 on the side opposite to the second meshing tooth. The connecting portion 208 can be wedge-connected with the mounting groove 207. The clearance adjustment assembly 210 is placed between the two. Specifically, the bottom of the mounting groove 207 has a clearance groove 209, which includes a first clearance groove 223 and a second clearance groove 224. The first clearance groove 223 and the second clearance groove 224 are arranged along the radial direction of the rocker arm shaft 205. Figure 6 As shown, the gap adjustment assembly 210 includes an elastic pad 211 and a spring 212. The elastic pad 211 is placed in the first clearance groove 223, and the spring 212 is placed in the second clearance groove 224. The elastic pad 211 protrudes from the first clearance groove 223 and abuts against the convex surface of the connecting part 208 to prevent the rocker arm shaft 205 from directly contacting the worm gear 206 and generating noise. Furthermore, the elastic pad 211 is elastically deformable, and the thickness of the compressed elastic pad 211 is greater than the depth of the first clearance groove 223.

[0044] Furthermore, the rocker arm shaft 205 and the worm gear 206 can be integrated. This increases the connection strength between the rocker arm shaft 205 and the worm gear 206, effectively improving the operational reliability of the steering gear 100.

[0045] Furthermore, such as Figure 3 , Figure 4 As shown, there can be multiple clearance adjustment components 210. The first clearance groove 223 and the second clearance groove 224 can be provided in multiple sets in the circumferential direction of the rocker arm shaft 205. Multiple clearance adjustment components 210 can jointly adjust the meshing clearance between the rocker arm shaft assembly 202 and the worm gear 201, thereby making the movement between the rocker arm shaft assembly 202 and the worm gear 201 more stable.

[0046] In some embodiments of the present invention, the rocker arm shaft 205 has a connecting hole, and the connecting portion 208 of the worm gear 206 has an oblong hole. Fasteners can sequentially pass through the connecting hole of the rocker arm shaft 205, the oblong hole of the connecting portion 208, and the connecting hole of the rocker arm shaft 205 to axially fix the connecting portion 208 within the mounting groove 207. In some specific embodiments, the fastener can be a connecting pin; in other specific embodiments, the fastener can be a bolt, rivet, etc. Axial fixing prevents the connecting portion 208 from dislodging from the mounting groove 207, and the oblong hole allows the connecting portion 208 to move radially. Simultaneously, when the second meshing tooth 204 wears after prolonged use, maintenance personnel can replace the worm gear 206 to update the second meshing tooth 204. The separate design of the worm gear 206 and the rocker arm shaft 205 allows for worm gear clearance adjustment, reducing the maintenance cost of the worm gear assembly 202 and thus increasing the added value of the steering gear 100.

[0047] Furthermore, such as Figure 5 , Figure 7 As shown, the rocker arm shaft 205 is provided with an anti-wear coating 215. The anti-wear coating 215 can reduce the friction between the rocker arm shaft 205 and the worm gear 206, thereby reducing the friction noise generated between the rocker arm shaft 205 and the worm gear 206 and improving the product quality of the steering gear 100.

[0048] In some embodiments of the present invention, the deceleration and reversing module 20 further includes: an upper deceleration and reversing housing 221, a lower deceleration and reversing housing 222, a front cover 225, and a rear cover 226.

[0049] According to some specific embodiments of the present invention, the rocker arm shaft 205 has a countersunk hole on its rear side. The first cavity defined by the upper deceleration reversing housing 221, the front cover 225, and the rear cover 226 are all provided with bearings. The worm gear 201 is rotatably placed in the upper deceleration housing. The rocker arm shaft assembly 202 is rotatably placed between the front cover 225 and the rear cover 226. The countersunk end of the rocker arm shaft 205 is placed at the rear cover 226. The front cover 225 and the rear cover 226 are placed between the upper deceleration reversing housing 221 and the lower deceleration reversing housing 222. The opposite side of the countersunk end of the rocker arm shaft 205 protrudes from the front cover 225 as the output end of the steering gear.

[0050] The deceleration and reversing module 20 also includes a position adjustment component 216, located between the rocker arm shaft assembly 202 and the rear cover 226, within the countersunk hole of the rocker arm shaft 205. The position adjustment component 216 includes an adjusting bolt 218, an adjusting plug 219, and two follower bearings 220. Both follower bearings 220 are sleeved on the outside of the adjusting bolt 218. Along the axial direction of the rocker arm shaft 205, at least a portion of the adjusting bolt 218, the adjusting plug 219, and the follower bearings 220 can extend from the end of the rocker arm shaft 205 into the rocker arm shaft 205. The two bearings 220 can be spaced apart along the axial direction of the rocker arm shaft 205. The two follower bearings 220 are adapted to abut against the rocker arm shaft 205 and the adjusting screw 219 to allow the rocker arm shaft 205 to rotate relative to the adjusting bolt 218. Another part of the adjusting bolt 218 passes through the rear cover 226. The assembler can adjust the protrusion length of the adjusting bolt 218 relative to the rear cover 226 by adjusting the portion of the adjusting bolt 218 located on the rear cover 226, driving the rocker arm shaft assembly to move along the axial direction of the rocker arm shaft 205, thereby making the position of the rocker arm shaft 205 more suitable. The adjusting screw 219 can press the follower bearings 220 against the rocker arm shaft 205, thereby preventing the follower bearings 220 and the adjusting bolt 218 from coming out of the rocker arm shaft 205.

[0051] According to some specific embodiments of the present invention, a limiting structure 217 is provided in the lower deceleration reversing housing 222 of the deceleration reversing module 20. The limiting structure 217 can be a limiting protrusion. In other embodiments, the limiting structure 217 can also be a limiting block. By making the moving rocker arm shaft assembly 202 contact with the limiting structure 217, the rotation angle of the rocker arm shaft assembly 202 can be limited, thereby avoiding excessive rotation of the rocker arm shaft assembly 202 and improving the safety of the steering gear 100.

[0052] Thus, the driver inputs the steering direction, steering angle, and steering torque into the identification and transmission module 10. The identification and transmission module 10 identifies and converts these into electrical signals and outputs them to the power assist and deceleration module 30. The power assist and deceleration module 30 receives the electrical signals and, after being judged by the controller 303, controls the motor 301 to output the assist torque, which is then transmitted to the worm gear 201 of the deceleration and reversing module 20. The rocker arm shaft 205 of the worm gear reduction structure of the deceleration and reversing module 20 outputs torque, driving the vehicle to steer.

[0053] Furthermore, when there are two or more power assist and deceleration modules 30, they can be stacked in one position, or a worm gear 201 can be set in the lower deceleration and reversing housing 222 of the deceleration and reversing module 20, so as to achieve the effect of setting two or more power assist and deceleration modules 30 in the steering gear 100.

[0054] The vehicle according to an embodiment of the present invention includes the steering gear 100 described above. The steering gear 100 is disposed in the vehicle and is used to control the vehicle's rotation to adjust its driving direction. By replacing the traditional recirculating ball transmission structure of the commercial vehicle steering gear with a worm gear transmission structure, the mechanical structure's load-bearing capacity can be improved. Pure electric power steering replaces the traditional hydraulic power steering. Simultaneously, an identification and transmission module 10 is added to the steering gear 100 to adjust the number of steering wheel rotations and hand force. This steering gear 100 has advantages such as pure electric power steering, simple structure, high fuel economy, light steering, and support for intelligent driving, providing the driver with a better driving experience. The use of a reduction and reversing module 20 with a worm gear 201 and a worm wheel assembly 202, and the identification and transmission module 10 in the steering gear 100 gives it advantages such as pure electric power steering, simple structure, high fuel economy, light steering, and support for intelligent driving, providing the driver with a better driving experience.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle steering system, characterized in that, include: The identification and transmission module (10) is adapted to be connected to the steering wheel of the vehicle for identifying the steering information of the steering wheel and converting the steering information into an electrical signal output. A deceleration and reversing module (20) is a worm gear drive used for reversing and decelerating the steering gear (100). The deceleration and reversing module (20) includes a worm (201) and a rocker arm shaft assembly (202). The outer circumferential surface of the worm (201) has a first meshing tooth (203), and the rocker arm shaft assembly (202) has a second meshing tooth (204) that meshes with the first meshing tooth (203). The rocker arm shaft assembly (202) is adapted to output torque to drive the vehicle to steer. The power assist and deceleration module (30) has a motor (301), a controller (303) and a deceleration mechanism (302). The power assist and deceleration module (30) is connected to the worm gear (201) of the deceleration and reversing module (20) and is connected to the identification and transmission module (10). The power assist and deceleration module (30) receives the electrical signal and controls the motor (301) to provide power to drive the worm gear (201) to rotate. The identification and transmission module (10) includes: a sensor (109), a torsion bar (103), an input shaft (104), an input bevel gear shaft (105), an input bevel gear ring (106), an intermediate bevel gear (107), an output shaft (102), and a first housing (108). The sensor (109) is placed on the relatively rotatable input shaft (104) and input bevel gear shaft (105) and is communicatively connected to the controller (303) of the power assist and deceleration module (30). It is used to detect the angle difference between the input shaft (104) and the input bevel gear shaft (105) and generate the electrical signal according to the angle difference. The sensor (109) is adapted to transmit the electrical signal to the power assist and deceleration module (30). The input bevel gear shaft (105) is coaxially arranged with the output shaft (102), and the intermediate bevel gear (107) is angularly arranged with both the input bevel gear shaft (105) and the output shaft (102), and is rotatably mounted on the first housing (108). The input bevel gear ring (106) is sleeved on the outside of the input bevel gear shaft (105). The input bevel gear ring (106) and the intermediate bevel gear (107) rotate around their respective central axes. The intermediate bevel gear (107) and the output shaft (102) rotate around their respective central axes. The input shaft (104) driven by the driver is adapted to drive the torsion bar (103) to rotate and the input bevel gear shaft (105) to rotate. The output shaft (102) can be connected to the deceleration reversing module (20) or the power assist and deceleration module (30). The rocker arm shaft assembly (202) of the deceleration and reversing module (20) is a split structure. The rocker arm shaft assembly (202) includes a rocker arm shaft (205), a worm gear (206), and a clearance adjustment assembly (210). The second meshing tooth (204) is disposed on the worm gear (206). The worm gear (206) is connected to the rocker arm shaft (205) of the deceleration and reversing module (20). The outer peripheral sidewall of the rocker arm shaft (205) is provided with a recessed part facing the rocker arm shaft (205). The mounting groove (207) has a connecting part (208) at one end of the worm gear (206) away from the worm (201). The connecting part (208) is installed in the mounting groove (207) and connected to the rocker arm shaft (205). The bottom of the mounting groove (207) of the rocker arm shaft (205) has a first clearance groove (223) and a second clearance groove (224). The clearance adjustment assembly (210) includes a spring (212) and an elastically deformable elastic pad (211). The elastic pad (211) is placed in the first clearance groove (223), and the spring (212) is placed in the second clearance groove (224). The thickness of the compressed elastic pad (211) is greater than the depth of the first clearance groove (223).

2. The vehicle steering system according to claim 1, characterized in that, The intermediate bevel gear (107) is at least one and is arranged between the input bevel gear ring (106) and the output shaft (102).

3. The vehicle steering system according to claim 1, characterized in that, The first housing (108) includes: a housing body (110) and a middle bevel gear base (111), wherein the middle bevel gear base (111) is mounted on the housing body (110) and the middle bevel gear (107) is mounted on the middle bevel gear base (111).

4. The vehicle steering system according to claim 1, characterized in that, The deceleration and reversing module (20) includes a deceleration and reversing housing, which is divided into an upper deceleration and reversing housing (221) and a lower deceleration and reversing housing (222). The lower deceleration and reversing housing (222) has a limiting structure (217).

5. The vehicle steering system according to claim 4, characterized in that, There is at least one worm gear (201), and the worm gear (201) is arranged on the circumferential side of the deceleration and reversing housing.

6. The vehicle steering system according to claim 1, characterized in that, The worm gear transmission method of the deceleration and reversing module (20) is a toroidal worm gear transmission.

7. The vehicle steering system according to claim 1, characterized in that, The connecting part (208) of the worm gear (206) has a wear-resistant coating (215).

8. The vehicle steering system according to claim 1, characterized in that, There is at least one power assist and deceleration module (30), which is communicatively connected to the identification and transmission module (10), and the power assist and deceleration module (30) is drive-connected to the deceleration and reversing module (20).

9. A vehicle, characterized in that, Including the steering system of the vehicle according to any one of claims 1-8.

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