阅读说明：本技术 转向时转向桥与后桥可平行的被拖挂车基本原理机构 (Towed vehicle basic principle mechanism with parallel steering axle and rear axle during steering ) 是由 郑庆华 于 2019-02-10 设计创作，主要内容包括：转向时转向桥与后桥可平行的被拖挂车基本原理机构,属于一种新一代的被拖挂车基本原理机构,它包括双滑轮型断电开关的不用差速器的两侧车轮驱动方法,它们解决了被拖挂车转向时其转向桥与后桥不可相互平行这个技术难题,也解决传统不用差速器的两侧车轮驱动方法的车辆性能的稳定性和耐用性这个技术难题,解决这些难题可提高被拖挂车行驶的安全性和稳定性也可增加被拖挂车的节数,提高效率节约运输成本等,其技术方案设置万向轴总成的前后车连接机构、V型竖轴连接体的转向桥总成,使用双滑轮型断电开关的驱动方法等。(The towed vehicle basic principle mechanism comprises a double-pulley type power-off switch two-side wheel driving method without a differential, solves the technical problem that the steering axle and the rear axle of the towed vehicle cannot be parallel to each other when the towed vehicle is steered, also solves the technical problem of the stability and the durability of the vehicle performance of the traditional two-side wheel driving method without the differential, can improve the driving safety and the stability of the towed vehicle, can increase the section number of the towed vehicle, improves the efficiency, saves the transportation cost and the like, and adopts the technical scheme that a front and rear vehicle connecting mechanism of a universal shaft assembly, a steering axle assembly of a V-shaped vertical shaft connecting body, a driving method using the double-pulley type power-off switch and the like are arranged.)

1. A basic principle mechanism of a towed vehicle with a steering axle and a rear axle which can be parallel during steering comprises a towed vehicle body frame, channel irons on two sides, a universal shaft assembly, a front pull rod assembly, a rear pull rod assembly, a spring steel plate assembly, a first steering axle assembly, a second steering axle assembly, a rear axle assembly, an upper locking shaft, a lower locking shaft, a wheel driving method, a double-pulley type power-off switch assembly and the like, wherein the towed vehicle body frame is used for erecting the towed vehicle body, the universal shaft assembly comprises a frame, a center outer sleeve half shaft connector, a left outer sleeve half shaft connector, a right outer sleeve half shaft connector, an upper torsion shaft frame, a lower torsion shaft frame, a central shaft and the like, the frame is fixedly formed by a front two-phase parallel vertical bar, an upper two-cross vertical bar, a rear vertical bar, a lower two-parallel vertical bar, a front upper transverse bar, a lower transverse bar, a rear transverse bar and the like, a shaft hole is respectively arranged in the middle of the lower two-parallel vertical bars, the central shaft penetrates through and, the front two-phase parallel vertical bar and the rear vertical bar are parallel, the front two-phase parallel vertical bar and the rear vertical bar are respectively crossed with 90 degrees with the front upper transverse bar, the two-side channel irons are respectively fixed at the front end of the towed vehicle body frame, the two-phase parallel vertical bar and the rear horizontal bar are respectively crossed with 90 degrees with the horizontal line, the upper ends of the two-phase parallel vertical bar and the rear vertical bar are respectively provided with a hole for locking two end hole sites corresponding to the upper locking shaft by screws, the two ends of the lower locking shaft are sleeved and fixed in the channel irons so as to be parallel to the upper locking shaft and be crossed with 90 degrees with the two-side channel irons, the double-pulley type power-off switch assembly comprises a support bottom, an insulating sheet, a right-wheel conductive sliding sheet, a left-wheel conductive sliding sheet, an insulating bottom sheet and a double-pulley assembly, the right-wheel conductive sliding sheet, the left-wheel conductive sliding sheet and the insulating sheet are all in a circular ring shape, and the, The pulley support comprises a spring A, a spring B, a lock rod A, a lock rod B, a screw A, a screw B, a screw C, a screw D and the like, the pulley support is fixedly formed by a support rod A, a support rod B and a shaft sleeve, the shaft sleeve is locked on an upper torsion shaft frame and locked by the screw C and the screw D, the tail end of the support rod A is provided with a hole site, the rear end of the lock rod A is also provided with a hole site, the two ends of the spring A are respectively locked on the two hole sites, the tail end of the support rod B is provided with a hole site, the rear end of the lock rod B is also provided with a hole site, the two ends of the spring B are respectively locked on the two hole sites, the pulley A is locked on the lock rod A, the screw A passes through the hole site at the rear end of the lock rod A to be locked on the hole site at the rear end of the support rod A, the screw B passes through the rear end of the lock rod B to be locked on the rear end, the insulating film is positioned above the support bottom and below the left wheel conductive sliding sheet and the right wheel conductive sliding sheet, so that the left wheel conductive sliding sheet and the right wheel conductive sliding sheet cannot leak electricity and form an independent circuit respectively, because the screw A penetrates through the rear end hole position of the lock rod A and the screw B also penetrates through the rear end hole position of the lock rod B, the lock rod A and the lock rod B can swing up and down respectively, and because of the action of the spring A and the spring B, the pulley A and the pulley B can cling to the left wheel conductive sliding sheet and the right wheel conductive sliding sheet respectively to slide, when severe conditions are met, the power can be kept to be conducted to the maximum extent, a bearing position is respectively arranged above and below the central point of the lower lock shaft for locking the lower torsion shaft frame, the lower torsion shaft frame comprises a lower torsion shaft, a support rod, a torsion rod A, a lower double-hole shaft, a double-hole flat sheet and the like, and the lower torsion shaft is locked on the bearing position of the central point, the upper torsion shaft frame mainly comprises an upper torsion shaft and an upper diplopore shaft, the upper torsion shaft, the upper diplopore shaft and an upper locking shaft are 90 degrees crossed, the left outer sleeve half shaft connector and the right outer sleeve half shaft connector are respectively positioned at the central point of the bearing outer sleeve and are positioned on the same straight line, the left outer sleeve half shaft connector and the right outer sleeve half shaft connector are respectively locked on the upper diplopore shaft and the lower diplopore shaft by the upper half shaft and the lower half shaft in an upright manner, the central outer sleeve half shaft connector comprises the left half shaft, the right half shaft and a central shaft outer sleeve, the left half shaft and the right half shaft are positioned at the central point of the central shaft outer sleeve, the frame is convenient to disassemble and assemble because the bearing position of the upper locking shaft is parallel to the bearing position of the lower locking shaft and is positioned on the same straight line, and the bearing position of the upper locking shaft and the bearing position of the central shaft outer sleeve bearing position and the bearing position of the bearing outer sleeve bearing position are also positioned on the same straight line and are crossed by 90 degrees, the torsion bar A can freely swing back and forth in the wheel jump of the trailer or the jump of the front vehicle, the spring steel plate assembly can be selected from the traditional forms, the spring steel plate assembly can be respectively locked at two sides of the vehicle body frame and is in a longitudinal shape, the spring steel plate assembly can be respectively locked by steel plates and is in a parallel shape, the first steering axle assembly, the second steering axle assembly and the rear axle assembly, the first steering axle assembly comprises a transverse pull rod A, V type vertical shaft connecting body A, a left steering wheel assembly, a right steering wheel assembly, a front axle housing, a double-hole plain film A and the like, the second steering axle assembly comprises a transverse pull rod B, V type vertical shaft connecting body B, a left steering wheel assembly, a right steering wheel assembly, a front axle housing, a double-hole plain film A and the like, the transverse pull rod A and the transverse pull rod B are in the same shape, the left wheel assembly or the right wheel assembly is respectively formed by an extension rod, The wheel comprises a transverse rod, a reinforcing shaft, a steering shaft, a double-hole flat sheet A, two vertical outer pipes, two vertical inner pipes, wheels and the like, wherein the reinforcing shaft and the steering shaft are parallel to each other and are vertically arranged to be vertical to a horizontal plane, the reinforcing shaft and the steering shaft are crossed with the transverse rod at an angle of 90 degrees, the two vertical outer pipes are parallel to each other, are parallel to the reinforcing shaft and the steering shaft and are fixed to be a whole with an extension rod and the transverse rod, the two vertical inner pipes are respectively inserted into the two vertical outer pipes and are locked by two upper and lower screws through hole sites arranged on the two vertical inner pipes and the two vertical outer pipes, the wheels can be selected from single wheels or double wheels, and can be selected from electric wheels or non-electric wheels, the non-electric wheels are traditional wheels, the electric wheels can be selected from hub motors, when the double wheels are selected, the double wheels share the same wheel shaft, the two ends of the wheel shaft are locked on the hole sites arranged at, the front axle shell is formed by fixedly connecting a bottom tube, two vertical shafts, two transverse tubes, two vertical bearing outer sleeves and the like together, wherein the bottom tube is parallel to the horizontal plane and is crossed with the two vertical shafts at 90 degrees, an upper bearing position and a lower bearing position are arranged at the center point of the bottom tube and are used for locking a V-shaped vertical shaft connector, the two vertical bearing outer sleeves are parallel to each other and are positioned at the same height, two bearing positions are respectively arranged at the upper part and the lower part and are used for sleeving and locking the steering shaft, a transverse pull rod (A or B) is linear, an upper bearing position and a lower bearing position are respectively arranged at the two ends of the transverse pull rod, the transverse pull rod (A or B) is locked and arranged on a hole position at the tail end of an extension rod by screws respectively to enable the transverse pull rod (A or B) to be parallel to the horizontal plane, the V-shaped vertical shaft connector A is formed by fixing a transverse rod, a longitudinal rod, a vertical, the cross bar and the longitudinal bar are crossed at 90 degrees and are crossed at 90 degrees with the vertical shaft, the vertical shaft is locked on a central bearing position of a bottom tube, the tail end of the cross bar is provided with a torsion bar B for locking a front pull rod assembly and a rear pull rod assembly, the tail end of the longitudinal bar is provided with an upper bearing position and a lower bearing position which are locked on a central hole of a transverse pull rod A by screws, a V-shaped vertical shaft connector B is fixedly formed by the cross bar, the longitudinal bar and the vertical shaft, the cross bar and the longitudinal bar are crossed at 90 degrees and are both crossed at 90 degrees with the vertical shaft, the vertical shaft is locked on the central bearing position of the bottom tube, the tail end of the cross bar is provided with a torsion bar C for locking the rear pull rod assembly, the tail end of the longitudinal bar is provided with an upper bearing position and a lower bearing position which are locked on the central hole of the transverse pull rod B by screws, the torsion bar B is arranged at the tail end of the cross bar of the V-shaped vertical shaft connector A for locking a six-bearing mechanism assembly in the front pull rod assembly and the rear pull rod assembly, and the six-bearing mechanism The front pull rod assembly comprises a front six-bearing mechanism assembly, a rear six-bearing mechanism assembly, a drag link and the like, the front six-bearing mechanism assembly and the rear six-bearing mechanism assembly are identical in shape and comprise an upper bearing outer sleeve rod, a lower bearing outer sleeve rod and a half shaft X bearing outer sleeve connecting body, the lower bearing outer sleeve rod comprises a front bearing outer sleeve and a rear bearing outer sleeve, the front bearing outer sleeve is provided with a front bearing position and a rear bearing position for locking the drag link, two screws are arranged above the front bearing outer sleeve for locking two hole positions arranged at the front end of the upper bearing outer sleeve rod, the rear bearing outer sleeve is provided with a bearing position, the half shaft X bearing outer sleeve connecting body is fixedly formed by an upper half shaft X, a lower half shaft X and an X shaft center bearing outer sleeve, two bearing positions are arranged at two ends of the X center bearing outer sleeve for locking the front pull rod assembly or the rear pull rod assembly, the upper half shaft X and the lower half shaft X are positioned in the same straight line and positioned at the center, because the two ends of the X center bearing outer sleeve are respectively provided with a bearing outer sleeve, the whole six-bearing mechanism is obviously formed into six bearings, because the X center bearing outer sleeve, the single vertical bearing outer sleeve and the single rear bearing outer sleeve are respectively crossed at 90 degrees, the front bearing outer sleeve, the single vertical bearing outer sleeve and the single rear bearing outer sleeve are respectively crossed at 90 degrees, the V-shaped vertical shaft connecting body (A or B) can freely rotate leftwards and rightwards no matter the wheel jumps or the universal shaft assembly rotates, so that the transverse pull rod (A or B) is driven to rotate, the left steering wheel assembly and the right steering wheel assembly are driven, so that the wheel is driven to steer leftwards and rightwards, because the steering axle (1 or 2) and the rear axle assembly are locked and fixed at the two sides of the towed vehicle body frame by the spring steel plate assemblies, the steering axle (1 or 2) and the rear axle assembly are in a positive transverse shape, and obviously parallel to each other, so when the wheel in the steering axle assembly (1 or 2) turns, the steering axle (1 or 2) can jump up and down under the action of the steel plate assembly, but does not steer left and right, because the spring steel plate assembly is fixed on the body frame of the towed vehicle, the invention can be called as a basic principle mechanism of the towed vehicle with the steering axle and the rear axle capable of being parallel during steering, because the steering axle and the rear axle can not be parallel to each other during steering of the traditional towed vehicle with the steering axle and the rear axle, the invention can generate potential safety hazard during heavy load or high-speed driving or large-amplitude turning or sharp turning, because the invention has relatively greater safety and great significance, because the steering axle assembly (1 or 2) and the rear axle assembly can be parallel, the towed vehicle can realize towing more than two sections, because each wheel of the invention can be set as an electric wheel, when a multi-section vehicle is towed, the universal shaft assembly mechanism of each section can realize smaller load, the invention is of great significance because the rear axle assembly is also arranged on the basic form of the steering axle assembly (1 or 2) but is not provided with a steering shaft and a transverse pull rod but is provided with a vertical inner tube and a vertical outer tube, and can also be arranged in the form of an electric wheel.

2. A towed vehicle-based mechanism according to claim 1, wherein said steered axle is substantially parallel to said rear axle, and wherein: further explaining the driving method of the wheels at two sides, the invention includes a driving method of the wheels at two sides without a differential mechanism of a double-pulley type power-off switch assembly, which can reduce the weight and energy consumption because of not using the differential mechanism, the bracket bottom is fixed above the central position of an upper lock shaft, a left wheel conductive sliding sheet, an insulating sheet and a right wheel conductive sliding sheet are arranged above the bracket bottom, a pulley A is tightly attached to a right wheel conductive sliding sheet, a pulley B is tightly attached to a left wheel conductive sliding sheet, a power supply inlet line A is locked on the pulley A, a power supply outlet line A is locked on the right wheel conductive sliding sheet, a power supply inlet line B is locked on the pulley B, a power supply outlet line B is locked on the left wheel conductive sliding sheet, because of the effects of the insulating sheet and the insulating sheet, and because the pulley bracket is an insulator, the pulley A and the pulley B are electric conductors, the power supply outlet line A is led to the right wheel, the power output line B is communicated with the left wheel, so that the power output line B and the power output line A are respectively independent lines, when the towed vehicle runs, when the universal shaft assembly is in a positive direction, the pulley A and the pulley B are in an electrified state, when the towed vehicle turns to the left, the pulley B slides to the insulating plate area due to the rotation of the universal shaft assembly, at the moment, the power output line A communicated with the right wheel is in an electrified state, the power output line B communicated with the left wheel is obviously in a power-off state, when the towed vehicle turns to the right, the pulley A slides to the insulating area due to the rotation of the universal shaft assembly, at the moment, the power output line B communicated with the left wheel is in an electrified state, the power output line A communicated with the right wheel is obviously in a power-off state, and the lubricating oil of the pulley A and the pulley B can be selected from lubricating oil containing graphite powder, the graphite powder has both electric conductivity and lubricity, so that the durability and electric conductivity of the pulley A and the pulley B can be improved, and in order to prevent rain and dust and improve safety, the periphery of the double-pulley type power-off switch assembly can be provided with an outer shell cover made of insulating materials for locking, so that the method for driving the wheels on two sides can be obviously applied to all vehicles with electric wheels on two sides, and the stability and durability of the vehicle performance are greatly improved.

Technical Field

The invention belongs to a basic principle mechanism of a towed vehicle of a new generation.

Background

Are developed and improved on the basis of the conventional technology.

Disclosure of Invention

The invention aims to provide a basic principle mechanism of a towed vehicle, which is relatively simple and can be suitable for the vertical jumping and the left and right steering of two vehicles connected in front and at the back of a motor vehicle, and the steering axle of the towed vehicle can be parallel to the rear axle of the towed vehicle when the vehicle turns, and the connecting mechanisms of the front and the rear vehicles are tightly locked and connected by a universal shaft assembly.

In order to solve the technical problem, the technical scheme of the invention is as follows: a basic principle mechanism of a towed vehicle with a steering axle and a rear axle which can be parallel during steering comprises a towed vehicle body frame, channel irons on two sides, a universal shaft assembly, a front pull rod assembly, a rear pull rod assembly, a spring steel plate assembly, a first steering axle assembly, a second steering axle assembly, a rear axle assembly, an upper locking shaft, a lower locking shaft, a wheel driving method, a double-pulley type power-off switch assembly and the like, wherein the towed vehicle body frame is used for erecting the towed vehicle body, the universal shaft assembly comprises a frame, a center outer sleeve half shaft connector, a left outer sleeve half shaft connector, a right outer sleeve half shaft connector, an upper torsion shaft frame, a lower torsion shaft frame, a central shaft and the like, the frame is fixedly formed by a front two-phase parallel vertical bar, an upper two-cross vertical bar, a rear vertical bar, a lower two-parallel vertical bar, a front upper transverse bar, a lower transverse bar, a rear transverse bar and the like, a shaft hole is respectively arranged in the middle of the lower two-parallel vertical bars, the central shaft penetrates through and, the front two-phase parallel vertical bar and the rear vertical bar are parallel, the front two-phase parallel vertical bar and the rear vertical bar are respectively crossed with 90 degrees with the front upper transverse bar, the two-side channel irons are respectively fixed at the front end of the towed vehicle body frame, the two-phase parallel vertical bar and the rear horizontal bar are respectively crossed with 90 degrees with the horizontal line, the upper ends of the two-phase parallel vertical bar and the rear vertical bar are respectively provided with a hole for locking two end hole sites corresponding to the upper locking shaft by screws, the two ends of the lower locking shaft are sleeved and fixed in the channel irons so as to be parallel to the upper locking shaft and be crossed with 90 degrees with the two-side channel irons, the double-pulley type power-off switch assembly comprises a support bottom, an insulating sheet, a right-wheel conductive sliding sheet, a left-wheel conductive sliding sheet, an insulating bottom sheet and a double-pulley assembly, the right-wheel conductive sliding sheet, the left-wheel conductive sliding sheet and the insulating sheet are all in a circular ring shape, and the, The pulley support comprises a spring A, a spring B, a lock rod A, a lock rod B, a screw A, a screw B, a screw C, a screw D and the like, the pulley support is fixedly formed by a support rod A, a support rod B and a shaft sleeve, the shaft sleeve is locked on an upper torsion shaft frame and locked by the screw C and the screw D, the tail end of the support rod A is provided with a hole site, the rear end of the lock rod A is also provided with a hole site, the two ends of the spring A are respectively locked on the two hole sites, the tail end of the support rod B is provided with a hole site, the rear end of the lock rod B is also provided with a hole site, the two ends of the spring B are respectively locked on the two hole sites, the pulley A is locked on the lock rod A, the screw A passes through the hole site at the rear end of the lock rod A to be locked on the hole site at the rear end of the support rod A, the screw B passes through the rear end of the lock rod B to be locked on the rear end, the insulating film is positioned above the support bottom and below the left wheel conductive sliding sheet and the right wheel conductive sliding sheet, so that the left wheel conductive sliding sheet and the right wheel conductive sliding sheet cannot leak electricity and form an independent circuit respectively, because the screw A penetrates through the rear end hole position of the lock rod A and the screw B also penetrates through the rear end hole position of the lock rod B, the lock rod A and the lock rod B can swing up and down respectively, and because of the action of the spring A and the spring B, the pulley A and the pulley B can cling to the left wheel conductive sliding sheet and the right wheel conductive sliding sheet respectively to slide, when severe conditions are met, the power can be kept to be conducted to the maximum extent, a bearing position is respectively arranged above and below the central point of the lower lock shaft for locking the lower torsion shaft frame, the lower torsion shaft frame comprises a lower torsion shaft, a support rod, a torsion rod A, a lower double-hole shaft, a double-hole flat sheet and the like, and the lower torsion shaft is locked on the bearing position of the central point, the upper torsion shaft frame mainly comprises an upper torsion shaft and an upper diplopore shaft, the upper torsion shaft, the upper diplopore shaft and an upper locking shaft are 90 degrees crossed, the left outer sleeve half shaft connector and the right outer sleeve half shaft connector are respectively positioned at the central point of the bearing outer sleeve and are positioned on the same straight line, the left outer sleeve half shaft connector and the right outer sleeve half shaft connector are respectively locked on the upper diplopore shaft and the lower diplopore shaft by the upper half shaft and the lower half shaft in an upright manner, the central outer sleeve half shaft connector comprises the left half shaft, the right half shaft and a central shaft outer sleeve, the left half shaft and the right half shaft are positioned at the central point of the central shaft outer sleeve, the frame is convenient to disassemble and assemble because the bearing position of the upper locking shaft is parallel to the bearing position of the lower locking shaft and is positioned on the same straight line, and the bearing position of the upper locking shaft and the bearing position of the central shaft outer sleeve bearing position and the bearing position of the bearing outer sleeve bearing position are also positioned on the same straight line and are crossed by 90 degrees, the torsion bar A can freely swing back and forth in the wheel jump of the trailer or the jump of the front vehicle, the spring steel plate assembly can be selected from the traditional forms, the spring steel plate assembly can be respectively locked at two sides of the vehicle body frame and is in a longitudinal shape, the spring steel plate assembly can be respectively locked by steel plates and is in a parallel shape, the first steering axle assembly, the second steering axle assembly and the rear axle assembly, the first steering axle assembly comprises a transverse pull rod A, V type vertical shaft connecting body A, a left steering wheel assembly, a right steering wheel assembly, a front axle housing, a double-hole plain film A and the like, the second steering axle assembly comprises a transverse pull rod B, V type vertical shaft connecting body B, a left steering wheel assembly, a right steering wheel assembly, a front axle housing, a double-hole plain film A and the like, the transverse pull rod A and the transverse pull rod B are in the same shape, the left wheel assembly or the right wheel assembly is respectively formed by an extension rod, The wheel comprises a transverse rod, a reinforcing shaft, a steering shaft, a double-hole flat sheet A, two vertical outer pipes, two vertical inner pipes, wheels and the like, wherein the reinforcing shaft and the steering shaft are parallel to each other and are vertically arranged to be vertical to a horizontal plane, the reinforcing shaft and the steering shaft are crossed with the transverse rod at an angle of 90 degrees, the two vertical outer pipes are parallel to each other, are parallel to the reinforcing shaft and the steering shaft and are fixed to be a whole with an extension rod and the transverse rod, the two vertical inner pipes are respectively inserted into the two vertical outer pipes and are locked by two upper and lower screws through hole sites arranged on the two vertical inner pipes and the two vertical outer pipes, the wheels can be selected from single wheels or double wheels, and can be selected from electric wheels or non-electric wheels, the non-electric wheels are traditional wheels, the electric wheels can be selected from hub motors, when the double wheels are selected, the double wheels share the same wheel shaft, the two ends of the wheel shaft are locked on the hole sites arranged at, the front axle shell is formed by fixedly connecting a bottom tube, two vertical shafts, two transverse tubes, two vertical bearing outer sleeves and the like together, wherein the bottom tube is parallel to the horizontal plane and is crossed with the two vertical shafts at 90 degrees, an upper bearing position and a lower bearing position are arranged at the center point of the bottom tube and are used for locking a V-shaped vertical shaft connector, the two vertical bearing outer sleeves are parallel to each other and are positioned at the same height, two bearing positions are respectively arranged at the upper part and the lower part and are used for sleeving and locking the steering shaft, a transverse pull rod (A or B) is linear, an upper bearing position and a lower bearing position are respectively arranged at the two ends of the transverse pull rod, the transverse pull rod (A or B) is locked and arranged on a hole position at the tail end of an extension rod by screws respectively to enable the transverse pull rod (A or B) to be parallel to the horizontal plane, the V-shaped vertical shaft connector A is formed by fixing a transverse rod, a longitudinal rod, a vertical, the cross bar and the longitudinal bar are crossed at 90 degrees and are crossed at 90 degrees with the vertical shaft, the vertical shaft is locked on a central bearing position of a bottom tube, the tail end of the cross bar is provided with a torsion bar B for locking a front pull rod assembly and a rear pull rod assembly, the tail end of the longitudinal bar is provided with an upper bearing position and a lower bearing position which are locked on a central hole of a transverse pull rod A by screws, a V-shaped vertical shaft connector B is fixedly formed by the cross bar, the longitudinal bar and the vertical shaft, the cross bar and the longitudinal bar are crossed at 90 degrees and are both crossed at 90 degrees with the vertical shaft, the vertical shaft is locked on the central bearing position of the bottom tube, the tail end of the cross bar is provided with a torsion bar C for locking the rear pull rod assembly, the tail end of the longitudinal bar is provided with an upper bearing position and a lower bearing position which are locked on the central hole of the transverse pull rod B by screws, the torsion bar B is arranged at the tail end of the cross bar of the V-shaped vertical shaft connector A for locking a six-bearing mechanism assembly in the front pull rod assembly and the rear pull rod assembly, and the six-bearing mechanism The front pull rod assembly comprises a front six-bearing mechanism assembly, a rear six-bearing mechanism assembly, a drag link and the like, the front six-bearing mechanism assembly and the rear six-bearing mechanism assembly are identical in shape and comprise an upper bearing outer sleeve rod, a lower bearing outer sleeve rod and a half shaft X bearing outer sleeve connecting body, the lower bearing outer sleeve rod comprises a front bearing outer sleeve and a rear bearing outer sleeve, the front bearing outer sleeve is provided with a front bearing position and a rear bearing position for locking the drag link, two screws are arranged above the front bearing outer sleeve for locking two hole positions arranged at the front end of the upper bearing outer sleeve rod, the rear bearing outer sleeve is provided with a bearing position, the half shaft X bearing outer sleeve connecting body is fixedly formed by an upper half shaft X, a lower half shaft X and an X shaft center bearing outer sleeve, two bearing positions are arranged at two ends of the X center bearing outer sleeve for locking the front pull rod assembly or the rear pull rod assembly, the upper half shaft X and the lower half shaft X are positioned in the same straight line and positioned at the center, because the two ends of the X center bearing outer sleeve are respectively provided with a bearing outer sleeve, the whole six-bearing mechanism is obviously formed into six bearings, because the X center bearing outer sleeve, the single vertical bearing outer sleeve and the single rear bearing outer sleeve are respectively crossed at 90 degrees, the front bearing outer sleeve, the single vertical bearing outer sleeve and the single rear bearing outer sleeve are respectively crossed at 90 degrees, the V-shaped vertical shaft connecting body (A or B) can freely rotate leftwards and rightwards no matter the wheel jumps or the universal shaft assembly rotates, so that the transverse pull rod (A or B) is driven to rotate, the left steering wheel assembly and the right steering wheel assembly are driven, so that the wheel is driven to steer leftwards and rightwards, because the steering axle (1 or 2) and the rear axle assembly are locked and fixed at the two sides of the towed vehicle body frame by the spring steel plate assemblies, the steering axle (1 or 2) and the rear axle assembly are in a positive transverse shape, and obviously parallel to each other, so when the wheel in the steering axle assembly (1 or 2) turns, the steering axle (1 or 2) can jump up and down under the action of the steel plate assembly, but does not steer left and right, because the spring steel plate assembly is fixed on the body frame of the towed vehicle, the invention can be called as a basic principle mechanism of the towed vehicle with the steering axle and the rear axle capable of being parallel during steering, because the steering axle and the rear axle can not be parallel to each other during steering of the traditional towed vehicle with the steering axle and the rear axle, the invention can generate potential safety hazard during heavy load or high-speed driving or large-amplitude turning or sharp turning, because the invention has relatively greater safety and great significance, because the steering axle assembly (1 or 2) and the rear axle assembly can be parallel, the towed vehicle can realize towing more than two sections, because each wheel of the invention can be set as an electric wheel, when a multi-section vehicle is towed, the universal shaft assembly mechanism of each section can realize smaller load, the invention is of great significance because the rear axle assembly is also arranged on the basic form of the steering axle assembly (1 or 2) but is not provided with a steering shaft and a transverse pull rod but is provided with a vertical inner tube and a vertical outer tube, and can also be arranged in the form of an electric wheel.

Further explaining the driving method of the wheels at two sides, the invention includes a driving method of the wheels at two sides without a differential mechanism of a double-pulley type power-off switch assembly, which can reduce the weight and energy consumption because of not using the differential mechanism, the bracket bottom is fixed above the central position of an upper lock shaft, a left wheel conductive sliding sheet, an insulating sheet and a right wheel conductive sliding sheet are arranged above the bracket bottom, a pulley A is tightly attached to a right wheel conductive sliding sheet, a pulley B is tightly attached to a left wheel conductive sliding sheet, a power supply inlet line A is locked on the pulley A, a power supply outlet line A is locked on the right wheel conductive sliding sheet, a power supply inlet line B is locked on the pulley B, a power supply outlet line B is locked on the left wheel conductive sliding sheet, because of the effects of the insulating sheet and the insulating sheet, and because the pulley bracket is an insulator, the pulley A and the pulley B are electric conductors, the power supply outlet line A is led to the right wheel, the power output line B is communicated with the left wheel, so that the power output line B and the power output line A are respectively independent lines, when the towed vehicle runs, when the universal shaft assembly is in a positive direction, the pulley A and the pulley B are in an electrified state, when the towed vehicle turns to the left, the pulley B slides to the insulating plate area due to the rotation of the universal shaft assembly, at the moment, the power output line A communicated with the right wheel is in an electrified state, the power output line B communicated with the left wheel is obviously in a power-off state, when the towed vehicle turns to the right, the pulley A slides to the insulating area due to the rotation of the universal shaft assembly, at the moment, the power output line B communicated with the left wheel is in an electrified state, the power output line A communicated with the right wheel is obviously in a power-off state, and the lubricating oil of the pulley A and the pulley B can be selected from lubricating oil containing graphite powder, the graphite powder has both electric conductivity and lubricity, so that the durability and electric conductivity of the pulley A and the pulley B can be improved, and in order to prevent rain and dust and improve safety, the periphery of the double-pulley type power-off switch assembly can be provided with an outer shell cover made of insulating materials for locking, so that the method for driving the wheels on two sides can be obviously applied to all vehicles with electric wheels on two sides, and the stability and durability of the vehicle performance are greatly improved.

Drawings

Fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, fig. 13, fig. 14, fig. 15, fig. 16, fig. 17, fig. 18, fig. 19, fig. 20, fig. 21, fig. 22, fig. 23, fig. 24, fig. 25, fig. 26, fig. 27 are schematic structural diagrams of the actual structure of the basic principle mechanism of the towed vehicle in which the steering axle and the rear axle can be parallel when steering.

In the figure: towed vehicle body frame 1, front pull rod assembly 2, rear pull rod assembly 3, spring steel plate assembly 4, first steering axle assembly 5, second steering axle assembly 6, rear axle assembly 7, upper lock shaft 8, lower lock shaft 9, double-pulley type power-off switch assembly 10, universal shaft assembly 11, frame 101, center outer sleeve half shaft connector 102, left outer sleeve half shaft connector 103, right outer sleeve half shaft connector 104, upper torsion shaft bracket 105, lower torsion shaft bracket 106, center shaft 107, front two-phase parallel vertical bars 201, upper two-cross vertical bars 202, rear vertical bars 203, lower two-phase parallel vertical bars 204, front upper and lower horizontal bars 205, rear horizontal bars 206, two-side channel irons 207, support bottom 301, insulating sheet 302, right-side wheel conductive sliding sheet 303, left-side wheel conductive sliding sheet 304, insulating bottom sheet 305, double-pulley assembly 306, pulley support 307, pulley A308, pulley B309, spring A310, spring B311, a latch A312, a latch B313, a screw A314, a screw B315, a screw C316, a screw D317, an A strut 401, a B strut 402, a shaft outer cover 403, a lower torsion shaft 501, a support rod 502, a torsion A503, a double-hole plain film 504, a lower double pipe shaft 505, an upper half shaft 506, a lower half shaft 507, a bearing outer cover 508, an upper torsion shaft 509, an upper double-hole shaft 510, a torsion rod B511, a torsion rod C512, a transverse tie rod A601, a V-shaped vertical shaft connector A602, a left wheel assembly 603, a right wheel assembly 604, a front axle housing 605, a double-hole plain film A606, a transverse tie rod B607, a V-shaped vertical shaft connector B608, an extension rod 609, a transverse rod 610, a reinforcement shaft 611, a steering shaft 612, two upright outer tubes 613, two upright inner tubes 614, a wheel 615, a cross bar 616, a longitudinal rod 617, a vertical shaft 618, a bottom tube 701, two upright bearings 703, the device comprises a drag link 801, an upper bearing outer sleeve rod 802, a lower bearing outer sleeve rod 803, a half shaft X bearing outer sleeve connecting body 804, a front bearing outer sleeve 805, a rear bearing outer sleeve 806, two screws 807, a six-bearing mechanism assembly 808, two screws 809, an upper half shaft X901, a lower half shaft X902, an X center bearing outer sleeve 903, a single vertical bearing outer sleeve 904, a power supply inlet line A905, a power supply outlet line A906, a power supply input line B907 and a power supply outlet line B908.

The specific implementation mode is as follows:

in order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

The basic principle mechanism of the towed vehicle in which a steering axle and a rear axle can be parallel when steering, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, fig. 13, fig. 14, fig. 15, fig. 16, fig. 17, fig. 18, fig. 19, fig. 20, fig. 21, fig. 22, fig. 23, fig. 24, fig. 25, fig. 26, and fig. 27, comprises a towed vehicle body frame 1, two-side channel irons 207, a universal shaft assembly 11, a front pull rod assembly 2, a rear pull rod assembly 3, a spring steel plate assembly 4, a first steering axle assembly 5, a second steering axle assembly 6, a rear axle assembly 7, an upper locking shaft 8, a lower locking shaft 9, a wheel driving method, a double-pulley type power-off switch assembly 10, and the like, wherein the towed vehicle body frame 1 is used for mounting a towed vehicle, and the universal shaft assembly 11 comprises a vehicle body 101, a center jacket connector 102, a left half axle connector, The right outer half shaft connecting body 104, the upper torsion shaft bracket 105, the lower torsion shaft bracket 106, the central shaft 107 and the like are sleeved outside the right outer half shaft connecting body 101, the frame 101 is fixedly formed by a front two-phase parallel vertical bar 201, an upper two-cross vertical bar 202, a rear vertical bar 203, a lower two-phase parallel vertical bar 204, a front upper transverse bar 205, a rear transverse bar 206 and the like, a shaft hole is respectively arranged in the middle of the lower two-phase parallel vertical bar 204, the central shaft 107 passes through and is locked on the two holes, the front two-phase parallel vertical bar 201 and the rear vertical bar 203 are parallel, the two-phase parallel vertical bar and the front upper transverse bar 205 and the rear transverse bar 206 are respectively crossed at 90 degrees, the two-side channel irons 207 are respectively fixed at the front end of the towed vehicle body frame 1, the two-phase parallel vertical bars are vertically arranged in parallel and are crossed at 90 degrees with the horizontal line, a hole is respectively arranged at the upper ends of the two-hole positions, the two ends are respectively locked at two ends corresponding to the upper lock shaft 8 by screws, the double-pulley type power-off switch assembly 10 comprises a support base 301, an insulating sheet 302, a right-side wheel conductive sliding sheet 303, a left-side wheel conductive sliding sheet 304, an insulating base sheet 305 and a double-pulley assembly 306, wherein the right-side wheel conductive sliding sheet 303, the left-side wheel conductive sliding sheet 304 and the insulating sheet 305 are all circular rings and are positioned on the same circular ring, the double-pulley assembly 306 is composed of a pulley support 307, a pulley A308, a pulley B309, a spring A310, a spring B311, a lock rod A312, a lock rod B313, a screw A314, a screw B315, a screw C316, a screw D317 and the like, the pulley support is formed by fixing an A support rod 401, a B support rod 402 and a shaft outer sleeve, the shaft outer sleeve 403 is locked on an upper torsion shaft support 105 and locked by a screw C316 and a screw D317, the tail end of the A support rod 401 is provided with a hole 403, the rear end of the lock rod A312 is also provided with a hole, two ends of the spring A, the tail end of the B support rod 402 is provided with a hole site, the rear end of the lock rod B313 is also provided with a hole site, two ends of the spring B311 are respectively locked on the two hole sites, the pulley A308 is locked on the lock rod A312, the screw A314 passes through the hole site at the rear end of the lock rod A312 and is locked on the hole site at the rear end of the A support rod 401, the screw B315 passes through the hole site at the rear end of the lock rod B313 and is locked on the rear end of the B support rod 402, the support bottom 301 is fixed at the upper end of the upper lock shaft 8, the insulating bottom sheet 305 is positioned above the support bottom 301 and below the left side wheel conductive sliding sheet 304 and the right side wheel conductive sliding sheet 303, so that the left side wheel conductive sliding sheet 304 and the right side conductive sliding sheet 303 cannot leak electricity and respectively form an independent circuit, because the screw A314 passes through the hole site at the rear end of the lock rod A312 and the B315 also passes through the hole site at the rear end of the lock rod B313, because of the action of the spring A310 and the spring B311, the pulley A308 and the pulley B309 can respectively cling to the left wheel conductive sliding piece 304 and the right wheel conductive sliding piece to slide 303, and can keep the electrification to the maximum extent when in severe conditions, the upper part and the lower part of the central point of the lower lock shaft 9 are respectively provided with a bearing position for locking the lower torsion shaft frame 106, the lower torsion shaft frame 106 comprises a lower torsion shaft 501, a support rod 502, a torsion rod A503, a lower double-hole shaft 505, a double-hole flat piece 504 and the like, the lower torsion shaft 501 is locked on the bearing position of the central point of the lower lock shaft 9 and is crossed with the support rod 502, the torsion rod A503 and the lower double-hole shaft 505 at 90 degrees, the double-hole flat piece 504 is locked on the support rod 502 and the torsion rod A503, the left outer half-shaft connecting body 103 and the right outer half-shaft connecting body 104 are consistent in shape and are parallel to each other, and are respectively composed of an upper half shaft 506, a lower half shaft, the upper half shaft 506 and the lower half shaft 507 are positioned at the central point of the bearing outer sleeve 508 and have the same length and are positioned on the same straight line, the upper torsion shaft bracket 105 mainly comprises an upper torsion shaft 509 and an upper double-hole shaft 510, the upper torsion shaft 509, the upper double-hole shaft 510 and the upper locking shaft 8 are crossed at 90 degrees, the left outer sleeve half shaft connecting body 103 and the right outer sleeve half shaft connecting body 104 are locked on the upper double-hole shaft 510 and the lower double-hole shaft 505 respectively by the upper half shaft 506 and the lower half shaft 507 in an upright manner, the central outer sleeve half shaft connecting body 102 comprises a left half shaft, a right half shaft and a central shaft sleeve, the left half shaft and the right half shaft are positioned at the central point of the central shaft sleeve and belong to the same straight line and are crossed at 90 degrees with the central shaft sleeve, two sides of the central shaft sleeve are respectively provided with a bearing position, the central shaft 107 passes through the two bearing positions and passes through the bearing positions in the bearing sleeves of the left outer sleeve, the left half shaft and the right half shaft in the central shaft outer sleeve half shaft connecting body 102 are locked on hole positions in the lower two parallel shafts 204 in the frame, the frame 101 can be locked on a front vehicle body frame and can also be fixed on the front vehicle body frame, because the upper locking shaft 8 is locked on the towed vehicle body frame 1 and the upper torsion shaft 501 is locked on the upper locking shaft 8, the frame 101 is convenient to assemble and disassemble, because the bearing position of the upper locking shaft 8 and the bearing position of the lower locking shaft 9 are parallel and on the same straight line, the upper locking shaft and the lower locking shaft are crossed with the bearing position of a central shaft outer sleeve and the bearing position of a bearing outer sleeve 508 which are also on the same straight line at 90 degrees, the torsion bar A503 can freely swing back and forth in the jumping of a towed vehicle wheel 615 or the jumping of the front vehicle, the spring steel plate assembly 4 can be selected in the traditional form, the left half shaft and the right half shaft are respectively locked on two sides of the vehicle body frame 1 and are both in the longitudinal shape, the steering axle assembly comprises a first steering axle assembly 5, a second steering axle assembly 6 and a rear axle assembly 7 which are respectively buckled and locked by steel plates and can be parallel, the first steering axle assembly 5 comprises a transverse pull rod A601, a V-shaped vertical shaft connecting body A602, a left steering wheel assembly 603, a right steering wheel assembly 604, a front axle housing 605, a double-hole plain film A606 and the like, the second steering axle assembly 6 comprises a transverse pull rod B601, a V-shaped vertical shaft connecting body B608, a left steering wheel assembly 603, a right steering wheel assembly 604, a front axle housing 605, a double-hole plain film A606 and the like, the transverse pull rod A602 and the transverse pull rod B607 are consistent in shape, the left wheel assembly 603 or the right wheel assembly 604 respectively comprise an extension rod 609, a transverse rods 610, a reinforcing shafts 611, a steering shafts 612, a double-hole plain film A606, two upright tubes 613, two upright inner tubes 614 and wheels 611 and the like, the reinforcing shafts 612 and the steering shafts are parallel, vertical to each other and horizontal planes, the two upright outer tubes 613 are parallel to each other, parallel to the reinforcing shaft 611 and the steering shaft 612 and fixed to the extension bar 609 and the lateral bar 610 as a whole, the two upright inner tubes 614 are inserted into the two upright outer tubes 613 respectively and locked by two up-and-down screws through holes formed in the two upright inner tubes 614 and the two upright outer tubes 613, the wheels 615 can be selected from single wheels or double wheels, or selected from electric wheels or non-electric wheels, the non-electric wheels are conventional wheels, the description is that the electric wheels can be selected from hub motors, when double wheels are selected, the double wheels share the same wheel shaft, the two ends of the wheel shaft are locked on the holes formed at the lower ends of the two corresponding upright inner tubes 614, the wheels 615 are upright and vertical to the horizontal plane, the double-hole flat sheet A606 is sleeved in the reinforcing shaft 611 and the steering shaft 612 and locked by nuts respectively, the front axle housing 605 is formed by fixedly connecting a bottom tube 701, two vertical shafts 702, two transverse tubes 703 and two vertical bearing outer sleeves 704, the bottom tube 701 is parallel to the horizontal plane and crosses the two vertical shafts 702 at 90 degrees, the center point of the bottom tube 701 is provided with an upper bearing position and a lower bearing position for locking the V-shaped vertical shaft connector 602, the two vertical bearing outer sleeves 704 are parallel to each other and at the same height and are respectively provided with two bearing positions for sleeving and locking the steering shaft 612, the transverse pull rod (A or B) is linear, the two ends of the transverse pull rod are respectively provided with an upper bearing position and a lower bearing position and are respectively locked on a hole position arranged at the tail end of the extension rod 609 by screws, so that the transverse pull rod (A or B) is parallel to the horizontal plane, the V-shaped vertical shaft connector A602 is formed by fixing a transverse rod 616, a vertical rod 617, a vertical shaft 618 and the like, the transverse rod 616 and the vertical rod 617 are crossed at 90 degrees, and the vertical shaft, the vertical shaft 618 is locked on the central bearing position of the bottom tube 701, the end of the cross bar 616 is provided with a torsion bar B511 for locking the front pull rod assembly 2 and the rear pull rod assembly 3, the end of the longitudinal bar 617 is provided with an upper bearing position and a lower bearing position which are locked on the central hole of the transverse pull rod A601 by screws, the V-shaped vertical shaft connector B602 is fixedly composed of the cross bar 616, the longitudinal bar 617 and the vertical shaft 618, the cross bar 616 and the longitudinal bar 617 are crossed at 90 degrees and are crossed at 90 degrees with the vertical shaft 618, the vertical shaft 618 is locked on the central bearing position of the bottom tube 701, the end of the cross bar 616 is provided with a torsion bar C for locking the rear pull rod assembly, the end of the longitudinal bar is provided with an upper bearing position and a lower bearing position which are locked on the central hole of the transverse pull rod B by screws, the end of the torsion bar A511 is provided with a torsion bar B for locking the six-shaft bearing mechanism assembly 808 in the front pull rod assembly and the rear pull rod assembly, the end of the torsion bar B is provided with a C512 for locking the six-shaft bearing, the front pull rod assembly 2 is composed of a front six-bearing mechanism assembly 808, a rear six-bearing mechanism assembly 808, a drag link 801 and the like, the front six-bearing mechanism assembly 808 and the rear six-bearing mechanism assembly 808 are identical in shape and comprise an upper bearing outer sleeve rod 802, a lower bearing outer sleeve rod 803 and a half shaft X bearing outer sleeve connecting body 804, the lower bearing outer sleeve rod 803 comprises a front bearing outer sleeve 805 and a rear bearing outer sleeve 806, the front bearing outer sleeve 805 is provided with a front bearing position and a rear bearing position for locking the drag link 801, two screws 809 are arranged above the front bearing outer sleeve 805 for locking two hole positions arranged at the front end of the upper bearing outer sleeve rod 802, the rear bearing outer sleeve 806 is provided with a bearing position, the half shaft X bearing outer sleeve connecting body 804 is fixedly composed of an upper half shaft X901, a lower half shaft X902 and an X shaft center bearing outer sleeve 903, two bearing positions are arranged at two ends of the X center bearing outer sleeve 903 for locking the front pull rod assembly, the upper half shaft X901 and the lower half shaft X902 are in the same straight line and are positioned at the central point of an X-center bearing outer sleeve 903, because two ends of the X-center bearing outer sleeve 903 are respectively provided with a bearing outer sleeve, the whole six-bearing mechanism assembly 808 is obviously seen to be six bearings, because the X-center bearing outer sleeve 903 is crossed with a single vertical bearing outer sleeve 904 and a single rear bearing outer sleeve 806 at 90 degrees, and the front bearing outer sleeve 805 is crossed with the single vertical bearing outer sleeve 904 and the single rear bearing outer sleeve 806 at 90 degrees, no matter the wheel 615 jumps or the universal shaft assembly 11 rotates, the V-shaped vertical shaft connector (A or B) 602 can freely rotate left and right, so as to drive the transverse pull rod (A or B) to rotate, thereby driving the left steering wheel assembly 603 and the right steering wheel assembly 604, thereby driving the wheels to steer left and right, and because the steering axle (1 or 2) and the rear axle assembly 7 are locked and fixed at two sides of the towed vehicle body frame 1 by the spring steel plate assembly 4, the steering axle assembly (1 or 2) can jump up and down under the action of the steel plate assembly when wheels in the steering axle assembly (1 or 2) are steered, but the steering axle (1 or 2) can not steer left and right obviously, because the spring steel plate assembly 4 is fixed on the towed vehicle body frame 1, the invention can be called as a towed vehicle basic principle mechanism with the steering axle and the rear axle capable of being parallel during steering, because the steering axle and the rear axle of the traditional towed vehicle with the steering axle and the rear axle can not be parallel to each other during steering, the potential safety hazard can be caused during heavy load or high-speed driving or large-amplitude turning or sharp turning, because the invention has relatively large safety, because the steering axle assembly (1 or 2) and the rear axle assembly 7 can be parallel, the towed vehicle can be towed by more than two sections, because each wheel of the invention can be set as an electric wheel, when a plurality of sections of vehicles are towed, the cardan shaft assembly mechanism of each section can realize smaller load, so that towing with more sections can be realized, and the greater transportation efficiency can be improved in daily life, thereby saving the transportation cost, therefore, the invention has important significance, and the rear axle assembly 7 is also set in the form of an electric wheel without a steering shaft and a transverse pull rod but with a vertical inner pipe and a vertical outer pipe on the basis of the steering axle assembly (1 or 2).

Further describing the driving method of the two-side wheels 615, the present invention includes a driving method of the two-pulley type power-off switch assembly 10 without a differential, which can reduce the weight and energy consumption because of the absence of a differential, wherein the base 301 is fixed above the center of the upper lock shaft 8, the base 301 is provided with a left-side wheel conductive sliding piece 304, an insulating piece 302, and a right-side wheel conductive sliding piece 303, a pulley a308 is tightly attached to the right-side wheel conductive sliding piece 303, a pulley B309 is tightly attached to the left-side wheel conductive sliding piece 304, a power input line a905 is locked on the pulley a308, a power output line a906 is locked on the right-side wheel conductive sliding piece 303, a power input line B907 is locked on the pulley B309, a power output line B908 is locked on the left-side wheel conductive sliding piece 304, because of the insulating piece 305 and the insulating piece 302, and because of the pulley bracket 307 is an insulator, the pulleys a308 and B309 are conductors, the power output line A905 is connected to the right wheel, the power output line B908 is connected to the left wheel, therefore, the power output line B908 and the power output line A906 are respectively arranged into independent lines, when the towed vehicle runs, when the universal shaft assembly 11 is in a positive direction, the pulley A308 and the pulley B309 are in an electrified state, when the towed vehicle turns to the left direction, due to the rotation of the universal shaft assembly 11, the pulley B309 slides to the insulating plate 302 area, the power output line A906 connected to the right wheel is in an electrified state, the power output line B908 connected to the left wheel is obviously in a power-off state, when the towed vehicle turns to the right direction, due to the rotation of the universal shaft assembly 11, the pulley A308 slides to the insulating plate 302 area, the power output line B908 connected to the left wheel is in an electrified state, the power output line A906 connected to the right wheel is obviously in a power-off state, the lubricating oil of the pulley A308 and the pulley B309 can be selected from lubricating oil containing graphite powder, the graphite powder has both electrical conductivity and lubricity, so that the durability and the electrical conductivity of the pulley A308 and the pulley B309 can be improved, and in order to prevent rain and dust and improve the safety, the periphery of the double-pulley type power-off switch assembly 10 can be provided with an outer casing cover made of insulating materials to lock, so that the method for driving the wheels at two sides can be obviously applied to all vehicles with electric wheels at two sides, and the stability and the durability of the vehicle performance are greatly improved.