Driving module and off-road vehicle

Abstract

The invention discloses a driving module and an off-road vehicle. The driving module comprises a driving axle assembly, a wheel-side driving shaft assembly, a wheel-side speed reducer assembly, an upper cross arm assembly and a lower cross arm assembly. The driving axle assembly adopts a disconnected double-stage speed reduction structure, and can effectively reduce the speed and increase the torque of a high-speed input from a transfer case through internal gears of the driving axle. The wheel-side driving shaft assembly is provided with a ball cage type universal joint structure, and can reduce the diameter of an intermediate shaft of the driving shaft. The wheel-side speed reducer assembly adopts an external gear wheel-side speed reduction structure, and can effectively increase the ground clearance under the bridge and the jumping stroke of the suspension. The upper cross arm assembly and the lower cross arm assembly constitute a double cross arm independent suspension, and ensure that the vehicle has good passability. By adopting the disconnected driving axle assembly, the ball cage type wheel-side driving shaft assembly, the external gear wheel-side speed reducer assembly and the double cross arm independent suspension technical solution, the vehicle can simultaneously meet the requirements of high maneuverability and high passability.

Description

Technical Field

[0001] The present invention relates to the technical field of off-road vehicles, and in particular to a driving module and an off-road vehicle. Background Art

[0002] The important technical features of high-mobility off-road vehicles are high maneuverability and high passability. Important indicators of high maneuverability include the driving torque of the wheel-end drive and the average off-road speed, while important indicators of high passability include ground clearance under the bridge, vehicle width, turning radius, etc.

[0003] In the actual vehicle development process, it is found that the above-mentioned important indicators are often contradictory, and the indicators have to be lowered when designing the drive module. For example, in order to obtain a larger driving torque, the transmission speed ratio from the engine to the wheel end needs to be increased. If the speed ratio increases, the diameter of the bridge needs to be increased, which in turn leads to a decrease in the ground clearance under the bridge; if the layout position of the bridge is moved up in an attempt to increase the ground clearance, it will lead to an increase in the layout angle of the wheel side drive shaft, which will limit the design of the working angle range of the drive shaft, thereby affecting the travel of the suspension and the wheel angle limit; if the wheel side reducer occupies a large lateral dimension in the overall layout of the vehicle, it will lead to an increase in the wheelbase, thereby reducing the vehicle's passability.

[0004] Therefore, how to resolve the contradiction between high maneuverability and high passability, and how to meet the high maneuverability of off-road vehicles while also meeting the passability of off-road vehicles is an issue that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, and to provide a driving module and an off-road vehicle, so as to solve the technical problem in the prior art that off-road vehicles are difficult to simultaneously meet the requirements of high maneuverability and high passability.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a driving module, comprising: The drive axle assembly is provided with a disconnecting double-stage reduction structure; The wheel side drive shaft assembly is provided with a ball cage type universal joint structure and is connected to the drive axle assembly through the ball cage type universal joint structure; The wheel side reducer assembly is used to connect the wheels, is provided with an external gear wheel side reduction structure, and is connected to the wheel side drive shaft assembly through the external gear wheel side reduction structure; An upper cross arm assembly, one end of which is connected to the vehicle frame, and the other end of which is connected to the upper end of the wheel-side reducer assembly; The lower cross arm assembly has one end connected to the vehicle frame and the other end connected to the lower end of the wheel-side reducer assembly.

[0007] In some embodiments, the travel drive module also includes a shock-absorbing spring and a spring guide unit, the upper end of the spring guide unit is connected to the frame, the lower end of the shock-absorbing spring is connected to the lower cross arm assembly, the shock-absorbing spring is sleeved on the spring guide unit, the upper end of the shock-absorbing spring is connected to the frame, and the lower end of the shock-absorbing spring is connected to the spring guide unit.

[0008] In some embodiments, the spring guide unit includes a guide column, a support module and a top connection module, the support module is fixed to the lower end of the guide column and rotatably connected to the lower cross arm assembly, and the top connection module is used to connect to the frame.

[0009] In some embodiments, the support module includes a support seat, a joint bearing, a dust ring and a pin shaft. The support seat is fixed to the lower end of the guide column and is used to support the shock-absorbing spring. A connecting head limit head is provided at the end of the support seat, and the connecting head limit head is connected to the lower cross arm assembly. The joint bearing is installed on the inner side of the connecting head limit head. The dust ring is installed on the connecting head limit head and is located on both sides of the joint bearing. The pin shaft connects the dust ring, the joint bearing and the lower cross arm assembly.

[0010] In some embodiments, the top connection module includes an elastic component and a locking piece. A connecting head is provided at the upper end of the guide column. The connecting head is used to connect to the frame. The elastic component is sleeved on the connecting head and connected to the frame. The locking piece is threadedly connected to the connecting head to lock the connecting head.

[0011] In some embodiments, the elastic component includes a pad base plate, a rubber pad, a centering washer, a rubber pad and a flat washer arranged in sequence from bottom to top, and the pad base plate, the rubber pad, the centering washer, the rubber pad and the flat washer are all sleeved on the connecting head.

[0012] In some embodiments, the upper cross arm assembly includes an upper cross arm ball pin, an upper cross arm body, an upper cross arm bushing and a positioning adjustment assembly, the cross arm ball pin is installed at one end of the upper cross arm body and connected to the wheel-side reducer assembly, the upper cross arm bushing is installed at the other end of the upper cross arm body for connecting to the frame, and the positioning adjustment assembly is connected to the cross arm bushing and the frame for adjusting the wheel inclination angle.

[0013] In some embodiments, the positioning and adjustment assembly includes a square hole eccentric gasket, an adjustment bolt, a round hole eccentric gasket and a locking nut. The round hole eccentric gasket and the square hole eccentric gasket are respectively arranged on both sides of the upper cross arm bushing. The adjustment bolt passes through the square hole eccentric gasket, the upper cross arm bushing and the round hole eccentric gasket. The locking nut is threadedly connected to the adjustment bolt to lock the adjustment bolt.

[0014] In some embodiments, the lower cross arm assembly includes a lower cross arm ball pin, a lower cross arm body and a lower cross arm bushing. The lower cross arm ball pin is installed at one end of the lower cross arm body and connected to the wheel-side reducer assembly. The lower cross arm bushing is used to connect to the frame via bolts.

[0015] In a second aspect, the present invention further provides an off-road vehicle, characterized in that it comprises the aforementioned driving module.

[0016] Compared with the prior art, the driving drive module provided by the present invention realizes the output of power to the wheels by setting a drive axle assembly, a wheel-side drive shaft assembly, a wheel-side reducer assembly, an upper cross arm assembly and a lower cross arm assembly. The drive axle assembly, the wheel-side drive shaft assembly and the wheel-side reducer assembly realize the output of power to the wheels. The drive axle assembly adopts a disconnected two-stage reduction structure, which can effectively reduce the speed and increase the torque of the high-speed input from the transfer case through the internal gears of the drive axle; the wheel-side drive shaft assembly is provided with a ball cage universal joint structure, and is connected to the drive axle assembly through the ball cage universal joint structure. The ball cage universal joint can realize conventional swinging and can also integrate the axial sliding function, thereby reducing the intermediate shaft of the drive shaft. diameter, the wheel-side reducer assembly adopts an external gear wheel-side reducer structure, which makes the input shaft and the output shaft non-concentric, and can reduce the layout angle of the wheel-side drive shaft assembly, thereby effectively increasing the ground clearance under the bridge and increasing the suspension's bounce stroke; the upper cross arm assembly and the lower cross arm assembly constitute a double wishbone independent suspension to ensure that the vehicle has good passability. By adopting a disconnected drive axle assembly, a ball cage wheel-side drive shaft assembly, an external gear wheel-side reducer assembly and a double wishbone independent suspension technical solution, a large reduction ratio can be obtained and a large driving torque can be ensured while increasing the ground clearance under the bridge, thereby enabling the vehicle to meet both high maneuverability and high passability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of a travel drive module provided by an embodiment of the present invention; Figure 2 is another structural schematic diagram of the travel drive module provided by an embodiment of the present invention; Figure 3 is an exploded view of an upper cross arm assembly of a travel drive module provided by an embodiment of the present invention; Figure 4 is a structural schematic diagram of a lower cross arm assembly of a travel drive module provided by an embodiment of the present invention; Figure 5 It is an exploded view of a spring guide module of a driving module provided in an embodiment of the present invention.

[0018] Reference numerals in the figures: 10—drive axle assembly 20—wheel side drive shaft assembly 30—wheel side reducer assembly 40—upper cross arm assembly 41—upper cross arm ball pin 42—upper cross arm body 43—upper cross arm bushing 44—positioning adjustment component 50—lower cross arm assembly 51—lower cross arm ball pin 52—lower cross arm body 53—lower cross arm bushing 60—damping spring 70—spring guide unit 71—guide column 72—Support module 73—Top connection module 80—Shock absorber assembly 90—brake assembly 101—steering gear assembly 102—limit block 103 - lateral stabilizer bar 104 - stabilizer bar bushing 105 - stabilizer bar suspension rod 106—limiting clamp 441—square hole eccentric gasket 442—adjusting bolt 443—Eccentric washer with round hole 444—Locking nut 711—Connector 721—Support seat 722—Spherical bearing 723—Dust ring 724—pin 725—circlip 731—elastic component 732-locking piece 7211-limiting head 7311-pad bottom plate 7312—first rubber pad 7313—centering washer 7314—second rubber pad 7315—Flat washer. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem in the prior art that off-road vehicles are difficult to simultaneously meet the requirements of high maneuverability and high passability, an embodiment of the present invention provides a driving module, which can enable the vehicle to simultaneously meet the requirements of high maneuverability and high passability.

[0021] It should be noted that the driving module described in the present invention is used for but not limited to off-road vehicles, etc. For the convenience of explanation, in the present invention, only the driving module applied to an off-road vehicle is used as an example for explanation, and the principles of applying the driving module to other types of devices are essentially the same as those applied to off-road vehicles, which will not be repeated here.

[0022] In order to achieve the above technical objectives, the embodiment of the present invention provides a driving module, such as Figure 1-2As shown, it includes a drive axle assembly 10, a wheel-side drive shaft assembly 20, a wheel-side reducer assembly 30, an upper cross arm assembly 40 and a lower cross arm assembly 50. The drive axle assembly 10 is provided with a disconnected two-stage reduction structure; the wheel-side drive shaft assembly 20 is provided with a ball cage universal joint structure, and is connected to the drive axle assembly 10 through the ball cage universal joint structure; the wheel-side reducer assembly 30 is used to connect the wheel, and is provided with an external gear wheel-side reduction structure, and is connected to the wheel-side drive shaft assembly 20 through the external gear wheel-side reduction structure; one end of the upper cross arm assembly 40 is connected to the frame, and the other end of the upper cross arm assembly 40 is connected to the upper end of the wheel-side reducer assembly 30; one end of the lower cross arm assembly 50 is connected to the frame, and the other end of the lower cross arm assembly 50 is connected to the lower end of the wheel-side reducer assembly 30.

[0023] Specifically, the driving module realizes the output of power to the wheels by setting a driving axle assembly 10, a wheel-side driving shaft assembly 20, a wheel-side reducer assembly 30, an upper cross arm assembly 40 and a lower cross arm assembly 50. The driving axle assembly 10, the wheel-side driving shaft assembly 20 and the wheel-side reducer assembly 30 realize the output of power to the wheels. The driving axle assembly 10 adopts a disconnected two-stage reduction structure, which can effectively reduce the speed and increase the torque of the high-speed input from the transfer case through the internal gears of the driving axle; the wheel-side driving shaft assembly 20 is provided with a ball cage universal joint structure, and through the ball cage universal joint structure, ... The cage-type universal joint structure connects the drive axle assembly 10. The ball cage universal joint can realize conventional swing and integrate the axial sliding function, thereby reducing the diameter of the intermediate shaft of the drive shaft. The wheel-side reducer assembly 30 adopts an external gear wheel-side reduction structure, so that the input shaft and the output shaft are not concentric, which can reduce the layout angle of the wheel-side drive shaft assembly 20, thereby effectively increasing the ground clearance under the bridge and increasing the suspension's jumping stroke; the upper cross arm assembly 40 and the lower cross arm assembly 50 constitute a double wishbone independent suspension to ensure that the vehicle has good passability.

[0024] This embodiment adopts a disconnected drive axle assembly 10, a ball cage wheel side drive shaft assembly 20, an external gear wheel side reducer assembly 30 and a double wishbone independent suspension technical solution, which can obtain a large reduction ratio and ensure a large driving torque while increasing the ground clearance under the bridge, thereby enabling the vehicle to meet both high maneuverability and high passability.

[0025] In this embodiment, the disconnected drive axle assembly 10 adopts a disconnected double-stage reduction structure, which is used to effectively reduce the speed and increase the torque of the high-speed input from the transfer case through the internal gears of the drive axle, and then output it through the flanges on both sides; the shell of the drive axle assembly 10 is cast from aluminum alloy to achieve lightweight assembly. The drive axle assembly 10 has a built-in limited slip differential, which can ensure that the other side does not lose driving force when one side of the wheel is suspended or slipping. The drive axle assembly 10 is connected to the frame through a rubber suspension, which can effectively isolate the working vibration from the internal gears of the drive axle and improve the NVH level of the chassis.

[0026] In this embodiment, the wheel side drive shaft assembly 20 adopts a ball cage universal joint structure, which is used to transmit the output speed and torque of the drive axle assembly 10 to the wheel side reducer assembly 30, thereby driving the wheel. Compared with the cross-axis universal joint, the ball cage universal joint has the advantages of light weight and constant speed transmission. The ball cage universal joint includes an inner ball cage universal joint and an outer ball cage universal joint. The inner ball cage universal joint of the wheel side drive shaft assembly 20 is connected to the drive axle assembly 10 through a flange. In addition to realizing conventional swinging, the inner ball cage universal joint can also integrate the axial sliding function, thereby reducing the diameter of the drive shaft intermediate shaft and facilitating the layout of the intermediate shaft. The inner ball cage universal joint of the wheel side drive shaft assembly 20 is connected to the wheel side reducer assembly 30 through a spline shaft, and the outer ball cage inner ball cage universal joint can only swing.

[0027] In this embodiment, the wheel-side reducer assembly 30 adopts an external gear wheel-side reduction structure, and the input shaft and the output shaft are not concentric. The advantage of this structure is that it can reduce the layout angle of the wheel-side drive shaft assembly 20, thereby effectively ensuring the ground clearance under the bridge and increasing the suspension's bounce stroke.

[0028] In one embodiment, if Figure 3 As shown, the upper cross arm assembly 40 includes an upper cross arm ball pin 41, an upper cross arm body 42, an upper cross arm bushing 43 and a positioning adjustment component 44. The cross arm ball pin is installed at one end of the upper cross arm body 42 and connected to the wheel-side reducer assembly 30. The upper cross arm bushing 43 is installed at the other end of the upper cross arm body 42 for connecting to the vehicle frame. The positioning adjustment component 44 is connected to the cross arm bushing and the vehicle frame for adjusting the wheel inclination. Specifically, the upper cross arm assembly 40 can be connected to the wheel-side reducer assembly 30 through the upper cross arm ball pin 41, providing the necessary freedom of movement during suspension bounce and steering. The upper cross arm bushing 43 can realize the connection between the upper cross arm assembly 40 and the vehicle frame. The positioning adjustment component 44 can be used in conjunction with the elliptical hole of the vehicle frame to adjust the positioning parameters such as the camber angle, kingpin inclination angle, and kingpin caster angle of the wheel.

[0029] In this embodiment, the upper cross arm ball pin 41 adopts a maintenance-free structure, which is installed on the upper cross arm body 42. It is an important motion joint connecting the upper cross arm assembly 40 and the wheel-side reducer assembly 30, providing the necessary freedom of movement during suspension bouncing and steering.

[0030] In this embodiment, the upper cross arm body 42 is forged from a high-strength aluminum alloy material, and mounting interfaces of components such as the upper cross arm ball pin 41 and the upper cross arm bushing 43 are integrated thereon.

[0031] In this embodiment, the upper cross arm bushing 43 adopts a metal frame vulcanized rubber structure, with a total of 2 pieces. The 2 upper cross arm bushings 43 are pressed into the dedicated holes reserved in the upper cross arm body 42 and connected to the frame by bolts, providing the necessary freedom of movement during the suspension bounce process, effectively isolating vibration, and improving NVH performance.

[0032] In one embodiment, if Figure 3 As shown, the positioning adjustment assembly 44 includes a square hole eccentric gasket 441, an adjustment bolt 442, a round hole eccentric gasket 443 and a locking nut 444. The round hole eccentric gasket 443 and the square hole eccentric gasket 441 are respectively arranged on both sides of the upper cross arm bushing 43. The adjustment bolt 442 passes through the square hole eccentric gasket 441, the upper cross arm bushing 43 and the round hole eccentric gasket 443. The locking nut 444 is threadedly connected to the adjustment bolt 442 to lock the adjustment bolt 442. Specifically, the square hole eccentric gasket 441, the adjustment bolt 442 and the round hole eccentric gasket 443 can ensure that the positioning adjustment assembly 44 cooperates with the elliptical hole of the frame, so as to facilitate the adjustment of positioning parameters such as the camber angle, the kingpin inclination angle and the kingpin caster angle of the wheel.

[0033] In one embodiment, if Figure 4 As shown, the lower cross arm assembly 50 includes a lower cross arm ball pin 51, a lower cross arm body 52 and a lower cross arm bushing 53. The lower cross arm ball pin 51 is installed at one end of the lower cross arm body 52 and connected to the wheel side reducer assembly 30. The lower cross arm bushing 53 is used to connect the vehicle frame through bolts. Specifically, the lower cross arm assembly 50 can be connected to the wheel side reducer assembly 30 through the lower cross arm ball pin 51, providing the necessary freedom of movement during suspension bounce and steering. The lower cross arm bushing 53 can realize the connection between the upper cross arm assembly 40 and the vehicle frame.

[0034] In this embodiment, the lower cross arm body 52 is cast from high-strength isothermally quenched ductile iron material, and the installation interfaces of components such as the shock absorber assembly 80, the stabilizer bar hanger 105, the spring guide mechanism, the lower cross arm ball pin 51, and the lower cross arm bushing 53 are integrated thereon.

[0035] In this embodiment, the lower cross arm ball pin 51 adopts a maintenance-free structure, which is installed on the lower cross arm body 52. ​​It is an important motion joint connecting the lower cross arm and the wheel-side reducer, providing the necessary freedom of movement during suspension bouncing and steering.

[0036] In this embodiment, the lower cross arm bushing 53 adopts a metal frame vulcanized rubber structure, with a total of 2 pieces. The 2 lower cross arm bushings 53 are pressed into the dedicated holes reserved in the lower cross arm body 52 and connected to the frame by bolts, providing the necessary freedom of movement during the suspension bounce process, and effectively isolating vibrations to improve NHV performance.

[0037] In one embodiment, if Figure 1-2As shown in FIG. 5 , the driving module further includes a damping spring 60 and a spring guide unit 70. The upper end of the spring guide unit 70 is connected to the vehicle frame, and the lower end of the damping spring 60 is connected to the lower cross arm assembly 50. The damping spring 60 is sleeved on the spring guide unit 70. The upper end of the damping spring 60 is connected to the vehicle frame, and the lower end of the damping spring 60 is connected to the spring guide unit 70. Specifically, the damping spring 60 is an elastic element of the driving module, which plays a role in alleviating the impact of the road surface. The spring guide unit 70 can provide guidance for the deformation of the spring, play a role in lateral support of the spring, and prevent the spring from becoming unstable. Even if the driving module adopts a damping spring 60 with a large aspect ratio, it will not cause the damping spring 60 to become unstable, thereby making the vehicle chassis adapt to the spring with a large aspect ratio for vibration reduction, reducing the layout space of the damping spring 60, increasing the limit wheel turning angle, reducing the wheelbase, and greatly reducing the turning radius and vehicle width.

[0038] In this embodiment, the damping spring 60 is a hot-rolled spring with a large aspect ratio, which effectively reduces the space requirement for radial arrangement of the damping spring 60 and reduces the wheelbase, turning radius and vehicle width.

[0039] In one embodiment, if Figure 5 As shown, the spring guide unit 70 includes a guide column 71, a support module 72 and a top connection module 73. The support module 72 is fixed to the lower end of the guide column 71 and is rotatably connected to the lower cross arm assembly 50. The top connection module 73 is used to connect the vehicle frame. Specifically, the guide column 71 can provide guidance for the deformation of the damping spring 60, thereby preventing the damping spring 60 from becoming unstable. The support module 72 can provide support for the damping spring 60, and can transmit the elastic force of the damping spring 60 to the lower cross arm assembly 50. The support module 72 is rotatably connected to the lower cross arm assembly 50, so that the guide column 71 can form a certain degree of yaw freedom, thereby ensuring the damping performance of the damping spring 60 on uneven roads. The top connection module 73 can realize the connection between the spring guide unit 70 and the vehicle frame.

[0040] In this embodiment, the guide column 71 is a maintenance-free structure, which can withstand radial lateral forces. According to performance requirements, a damping valve can be built in to provide a certain damping force as an auxiliary shock absorber.

[0041] In one embodiment, if Figure 5As shown, the support module 72 includes a support seat 721, a joint bearing 722, a dust ring 723 and a pin 724. The support seat 721 is fixed to the lower end of the guide column 71 and is used to support the damping spring 60. A limit head 7211 is provided at the end of the support seat 721. The limit head 7211 is connected to the lower cross arm assembly 50. The joint bearing 722 is installed on the inner side of the limit head 7211. The dust ring 723 is installed on the limit head 7211 and is located on both sides of the joint bearing 722. The pin 724 connects the dust ring 723, the joint bearing 722 and the lower cross arm assembly 50. Specifically, the support seat 721 can provide support for the damping spring 60, and the joint bearing 722, the dust ring 723 and the pin 724 can absorb a larger assembly size deviation and provide a larger motion angle.

[0042] In this embodiment, Figure 5 As shown, the support module 72 further includes a retaining spring 725 , which is mounted on the limiting head 7211 and located on both sides of the spherical bearing 722 to clamp the spherical bearing 722 .

[0043] In one embodiment, if Figure 5 As shown, the top connection module 73 includes an elastic component 731 and a locking member 732. The upper end of the guide column 71 is provided with a connector 711, the connector 711 is used to connect to the frame, the elastic component 731 is sleeved on the connector 711 and connected to the frame, and the locking member 732 is threadedly connected to the connector 711 to lock the connector 711. Specifically, the elastic component 731 can realize the elastic connection between the guide column 71 and the frame, thereby isolating vibration.

[0044] In one embodiment, if Figure 5 As shown, the elastic component 731 includes a pad bottom plate 7311, a first rubber pad 7312, a centering washer 7313, a second rubber pad 7314, and a flat washer 7315, which are arranged in sequence from bottom to top. The pad bottom plate 7311, the first rubber pad 7312, the centering washer 7313, the second rubber pad 7314, and the flat washer 7315 are all sleeved on the connector 711. Specifically, the elastic component 731 can realize the flexible connection between the guide column 71 and the frame through the superposition of the pad bottom plate 7311, the rubber pad 7312, the centering washer 7313, the rubber pad 7312, and the flat washer 7315, so that the guide column 71 can be isolated from vibration and provide a certain degree of freedom of yaw movement, thereby improving the vehicle's passability.

[0045] In this embodiment, the locking member 732 is a nut.

[0046] In one embodiment, if Figure 1As shown, the driving module also includes a shock absorber assembly 80. The upper end of the shock absorber assembly 80 is connected to the frame through a bracket, and the lower end is connected to the lower cross arm assembly 50. The lower cross arm assembly 50 swings up and down driven by the bouncing of the wheel, thereby causing the shock absorber assembly 80 to be compressed and stretched, and the shock absorber assembly 80 generates a compression or stretching damping force. The shock absorber assembly 80 and the shock absorbing spring 60 are respectively located on both sides of the wheel side reducer, so that the shock absorber assembly 80 and the shock absorbing spring 60 are respectively placed in the left and right turning triangle areas, and the corner space is used evenly to obtain a larger wheel limit turning angle.

[0047] In this embodiment, the shock absorber assembly 80 is a double-tube double-acting hydraulic shock absorber.

[0048] In one embodiment, if Figure 1-2 As shown, the driving module also includes a brake assembly 90, which is a hydraulic double-piston floating caliper brake installed on the wheel-side reducer assembly 30. When braking is required, the internal friction plate holds the brake disc tightly under the action of high-pressure brake fluid, thereby achieving the purpose of deceleration. The brake disc is cast from heat-fatigue-resistant alloy gray cast iron and has a ventilated disc structure. The brake disc is fixed to the hub flange of the wheel-side reducer assembly 30 and shares bolts with the wheel installation.

[0049] In one embodiment, if Figure 1-2 As shown, the driving module also includes a steering gear assembly 101, which adopts a gear rack steering gear. The steering gear assembly 101 body is connected to the vehicle frame, and the ball pins of the tie rods at both ends are respectively connected to the left and right wheel-side reducer assemblies 30. The steering gear assembly 101 converts the rotation input of the steering wheel into the left and right linear motion output of the rack, and the rack drives the tie rods at both ends to move left and right, thereby driving the wheel-side reducer assembly 30 to rotate around the main pin axis 724, thereby achieving the purpose of steering.

[0050] In one embodiment, if Figure 2 As shown, the travel drive module also includes a limit block 102, which is installed on the frame and located above the lower cross arm assembly 50. The limit block 102 is an upward jump travel limit mechanism of the travel drive module, and the main body is made of rubber material, and a metal skeleton is vulcanized inside. When the wheel jumps upward, the lower cross arm assembly 50 swings upward accordingly. When the lower cross arm assembly 50 swings to a certain angle, it contacts and compresses the limit block 102 until the lower cross arm assembly 50 cannot continue to swing upward, thereby limiting the limit travel.

[0051] In one embodiment, if Figure 1As shown, the driving module also includes a lateral stabilizer bar 103. The middle section of the lateral stabilizer bar 103 is connected to the frame through a stabilizer bar bushing 104, and both ends are respectively connected to the left and right lower cross arm assemblies 50 through stabilizer bar hangers 105. The stabilizer bar hanger 105 adopts a double ball pin structure, one end of the ball pin is connected to the lateral stabilizer bar 103, and the other end of the ball pin is connected to the lower cross arm assembly 50, which transmits the force generated by the torsion of the lateral stabilizer bar 103. The lateral stabilizer bar 103 is made of high-strength spring steel hot-formed, which can effectively increase the suspension roll stiffness and increase steering driving safety.

[0052] In this embodiment, the stabilizer bar bushing 104 is a fixing mechanism of the lateral stabilizer bar 103. A lateral stabilizer bar 103 has two stabilizer bar bushings 104, which are disposed on the left and right sides of the lateral stabilizer bar 103. The lateral stabilizer bar 103 bushing is composed of a rubber bushing and a bushing fixing clamping plate. The rubber bushing can be assembled or pre-vulcanized with the lateral stabilizer bar 103.

[0053] In this embodiment, Figure 1 As shown, the lateral stabilizer bar 103 is equipped with a limit clamp 106, which is installed on the inner side or outer side of the installation position of the stabilizer bar bushing 104 to prevent the lateral stabilizer bar 103 from moving left and right when subjected to axial force.

[0054] The embodiment of the present invention further provides an off-road vehicle, comprising the driving module. Specifically, by providing the driving module, the off-road vehicle can obtain a large reduction ratio, ensure a large driving torque, and increase the ground clearance under the bridge, thereby enabling the vehicle to simultaneously meet high maneuverability and high passability.

[0055] In order to better understand the present invention, the following Figures 1 to 5 The technical scheme of the present invention is described in detail: the embodiment of the present invention realizes a large speed ratio two-stage reduction by adopting a disconnected drive axle assembly 10 and a wheel-side reducer assembly 30, which can reduce the height of the drive axle assembly 10 while increasing the driving torque, improve the ground clearance under the bridge, and ensure the vehicle's passability; the external gear wheel-side reducer assembly 30 is adopted, which can reduce the arrangement angle of the wheel-side drive shaft assembly 20 and improve reliability; the double wishbone independent suspension structure is adopted, and the left and right suspension movements have little mutual influence on uneven roads. In addition, the independent suspension has a smaller unsprung mass, thereby improving the chassis smoothness and handling stability; the shock absorber assembly 80 and the shock absorbing spring 60 are arranged in parallel and separately, and are placed in the left and right steering triangle areas, so as to evenly utilize the corner space and obtain a larger wheel limit angle; the shock absorbing spring 60 with a large aspect ratio is adopted to reduce the radial diameter of the spring, obtain a larger wheel limit angle, and reduce the turning radius; the spring guide unit 70 is adopted and arranged on the inner diameter of the spring to prevent the spring from being instable due to the large aspect ratio; the hydraulic disc brake is adopted to obtain better braking performance.

[0056] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A driving module, characterized in that: include: The drive axle assembly is provided with a disconnecting double-stage reduction structure; The wheel side drive shaft assembly is provided with a ball cage type universal joint structure and is connected to the drive axle assembly through the ball cage type universal joint structure; The wheel side reducer assembly is used to connect the wheels, is provided with an external gear wheel side reduction structure, and is connected to the wheel side drive shaft assembly through the external gear wheel side reduction structure; An upper cross arm assembly, one end of which is connected to the vehicle frame, and the other end of which is connected to the upper end of the wheel-side reducer assembly; The lower cross arm assembly has one end connected to the vehicle frame and the other end connected to the lower end of the wheel-side reducer assembly.

2. The driving module according to claim 1, characterized in that: The travel drive module also includes a damping spring and a spring guide unit, the upper end of the spring guide unit is connected to the frame, the lower end of the damping spring is connected to the lower cross arm assembly, the damping spring is sleeved on the spring guide unit, the upper end of the damping spring is connected to the frame, and the lower end of the damping spring is connected to the spring guide unit.

3. The driving module according to claim 2, characterized in that: The spring guide unit comprises a guide column, a support module and a top connection module. The support module is fixed to the lower end of the guide column and is rotatably connected to the lower cross arm assembly. The top connection module is used to connect to the vehicle frame.

4. The driving module according to claim 3, characterized in that: The support module includes a support seat, a joint bearing, a dust ring and a pin shaft. The support seat is fixed to the lower end of the guide column and is used to support the damping spring. A connecting head limit head is provided at the end of the support seat, and the connecting head limit head is connected to the lower cross arm assembly. The joint bearing is installed on the inner side of the connecting head limit head. The dust ring is installed on the connecting head limit head and is located on both sides of the joint bearing. The pin shaft connects the dust ring, the joint bearing and the lower cross arm assembly.

5. The driving module according to claim 3, characterized in that: The top connection module includes an elastic component and a locking piece. A connecting head is provided at the upper end of the guide column. The connecting head is used to connect to the frame. The elastic component is sleeved on the connecting head and connected to the frame. The locking piece is threadedly connected to the connecting head to lock the connecting head.

6. The driving module according to claim 5, characterized in that: The elastic component includes a pad base plate, a rubber pad, a centering washer, a rubber pad and a flat washer which are arranged in sequence from bottom to top. The pad base plate, the rubber pad, the centering washer, the rubber pad and the flat washer are all sleeved on the connector.

7. The driving module according to any one of claims 1 to 6, characterized in that: The upper cross arm assembly includes an upper cross arm ball pin, an upper cross arm body, an upper cross arm bushing and a positioning adjustment component. The cross arm ball pin is installed at one end of the upper cross arm body and connected to the wheel-side reducer assembly. The upper cross arm bushing is installed at the other end of the upper cross arm body for connecting to the frame. The positioning adjustment component is connected to the cross arm bushing and the frame for adjusting the wheel inclination.

8. The driving module according to claim 7, characterized in that: The positioning and adjustment assembly includes a square hole eccentric gasket, an adjustment bolt, a round hole eccentric gasket and a locking nut. The round hole eccentric gasket and the square hole eccentric gasket are respectively arranged on both sides of the upper cross arm bushing. The adjustment bolt passes through the square hole eccentric gasket, the upper cross arm bushing and the round hole eccentric gasket. The locking nut is threadedly connected to the adjustment bolt to lock the adjustment bolt.

9. The driving module according to any one of claims 1 to 6, characterized in that: The lower cross arm assembly includes a lower cross arm ball pin, a lower cross arm body and a lower cross arm bushing. The lower cross arm ball pin is installed at one end of the lower cross arm body and connected to the wheel-side reducer assembly. The lower cross arm bushing is used to connect the frame through bolts.

10. An off-road vehicle, characterized in that: It comprises a driving module as described in any one of claims 1 to 9.

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