New energy automobile electronic steering test bench

Abstract

The invention discloses a new energy automobile electronic steering test bench comprising a supporting mechanism used for supporting an automobile steering system, the supporting mechanism is provided with a connecting mechanism, a distance adjusting mechanism, a controller and a display, and the display and the automobile steering system are electrically connected with the controller; the supporting mechanism is formed by the bearing assembly and the opening and closing assembly, the opening and closing assembly can be turned over and opened when the automobile steering system and the supporting mechanism are assembled, structural placement of the automobile steering system is facilitated, the operable space can be expanded, and the assembling efficiency of workers can be improved; the distance between the two supporting plates and the mounting base can be adjusted through the distance adjusting mechanism according to the distance between the two front wheels, and the height of an n-shaped plate can be adjusted through an air cylinder according to the diameter of the front wheels, so that the supporting mechanism, the riding wheel mechanism and the connecting mechanism can support automobile steering systems of different models; and the application range of the new energy automobile electronic steering test bench is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile steering test, in particular to an electronic steering test bench for new energy vehicles. Background Art

[0002] New energy vehicles (NEVs) use unconventional fuels as their power source (or use conventional fuels with new onboard power units), integrating advanced technologies in vehicle power control and drive to create vehicles with advanced technical principles, new technologies, and new structures. New energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, and hydrogen engine vehicles.

[0003] With the rapid development of automotive technology, automotive steering systems have evolved significantly, from traditional mechanical and hydraulic power steering systems to electronically controlled steering systems and finally to steer-by-wire systems. As people's demands for automotive safety continue to rise, steer-by-wire systems are becoming increasingly common, as they offer enhanced safety, driving characteristics, and a better sense of the road.

[0004] Patent publication number CN108375480B discloses a vehicle steering system test bench, comprising a steering torque, a steering wheel, an electronic control unit (ECU) 1, a drive motor, an electromagnetic clutch 1, a gear rack, a tire assembly, an electronic control unit 2, a feedback motor, an electromagnetic clutch 2, a controller, a reducer, a sensor group, a steering shaft, and a connecting shaft. The steering torque acts on the steering wheel. The lower end of the steering wheel is connected to the upper end of the steering shaft, which is connected to the upper side of the electromagnetic clutch 1. The upper end of the connecting shaft is connected to the lower side of the electromagnetic clutch. The lower end of the connecting shaft is connected to the reducer, which is connected to the gear rack. Both sides of the gear rack are connected to the tire assembly. This system combines the working principles of steer-by-wire (SBW), electronically controlled steering (EPS), and traditional mechanical steering systems into a single system. Furthermore, it can switch between the three steering systems according to different operating conditions, eliminating the problem of redundant steering system test benches and addressing common faults that can occur in SBW systems.

[0005] Although the above-mentioned automobile steering system test bench can solve the corresponding technical problems, it needs to be supported by a test bench during the test in order to simulate the steering operation under real driving conditions and test the steering performance. However, the existing test bench is an integral structure. When assembling the automobile steering system test bench with the steps, it will be difficult to assemble due to limited space. At the same time, different car models have different front wheel tracks and wheel diameters. The existing test bench is difficult to adjust appropriately according to different car models, and its applicability is low.

[0006] Therefore, a new energy vehicle electronic steering test bench is proposed. Summary of the Invention

[0007] The technical task of the present invention is to address the above shortcomings and provide a new energy vehicle electronic steering test bench to solve the above problems.

[0008] To achieve the above object, the present invention provides the following technical solutions: A new energy vehicle electronic steering test bench includes a support mechanism for supporting a vehicle steering system, a connecting mechanism, a distance adjustment mechanism, a controller, and a display provided thereon, wherein the display and the vehicle steering system are electrically connected to the controller respectively; The automobile steering system includes a steering wheel, a steering column assembly, a steering gear assembly, a steering bracket, a suspension, a front wheel, and a shock absorber. One end of the steering column assembly is connected to the steering wheel, and the other end of the steering column assembly is connected to the steering gear assembly. The steering bracket is installed on the steering gear assembly. The suspension is fixedly connected to each of the two sides of the steering bracket. The front wheels are connected to each of the two ends of the steering gear assembly. The suspension is arranged in a one-to-one correspondence with the front wheels. The suspension is connected to the corresponding front wheel. The shock absorber is connected to each of the two front wheels on opposite sides. The support mechanism is used to provide an installation basis for the steering platform, suspension, roller mechanism, connecting mechanism, distance adjustment mechanism, controller and display. The roller mechanism is arranged at the bottom of the inner cavity of the support mechanism and is used to support the front wheels. The connecting mechanism is arranged at the top of the support mechanism and is used to support the shock absorber. The distance adjustment mechanism is used to adjust the distance between the roller mechanism and the local components of the connecting mechanism to adapt to automobile steering systems with different front wheel spacings. The controller is arranged at the front side of the top of the support mechanism and can cooperate with the automobile steering system to realize test simulation of three steering systems. The display is arranged at the rear side of the top of the support mechanism and can intuitively monitor and display real-time data, indicators and trends.

[0009] Preferably, the support mechanism includes a supporting assembly, a top side of the supporting assembly away from the display is provided with an opening and closing assembly, and the controller is provided on the opening and closing assembly; Wherein, the supporting assembly includes a rectangular frame, the front side of the top of the rectangular frame is fixedly connected to two vertical poles A, the back side of the top of the rectangular frame is fixedly connected to a vertical pole B parallel to the vertical pole A, four vertical poles B are distributed in a rectangular array, the tops of the four vertical poles B are commonly fixedly connected to a mounting plate, the display is mounted on the top of the mounting plate, the front side of the inner cavity of the rectangular frame is fixedly connected to a crossbar A, both sides of the top of the crossbar A are fixedly connected to vertical poles C arranged parallel to the vertical poles A, the top of the vertical pole C can be connected and fixed to the steering bracket, both sides of the top of the rectangular frame are fixedly connected to a column, and the top of the column can be fixed to the suspension connection; The four corners of the bottom of the rectangular frame are each fixedly connected with a leg in a vertical direction, and the bottom end of the leg is installed with a moving wheel with a brake pad; The opening and closing assembly and the connecting mechanism are respectively arranged in front and back between the vertical pole A and the vertical pole B on the front side. The supporting wheel mechanism is arranged on the top of the rectangular frame, and the supporting wheel mechanism is placed between the vertical pole C and the vertical pole B on the front side. The distance adjustment mechanism is arranged between the rectangular frame and the connecting mechanism.

[0010] Preferably, the opening and closing assembly includes a C-shaped frame rotatably connected between two vertical poles A, the end of the C-shaped frame is detachably connected to the connecting mechanism, two V-shaped plates are fixedly connected to the inner wall surface of the C-shaped frame, and a accommodating space for the upper end of the steering column assembly is formed between the two V-shaped plates. The V-shaped plate is fixedly connected to the upper end of the steering column assembly, and the controller is installed on the side of the inner cavity of the C-shaped frame away from the V-shaped plate.

[0011] Preferably, the wheel supporting mechanism includes two cross bars B fixedly connected to the top of the rectangular frame, the column is located between the two cross bars B, and one of the cross bars B is located below the U-shaped frame, and the other cross bar B is located below the connecting mechanism. A plate is provided on each side of the surface of the rectangular frame, and the cross bar B is provided between the two support plates. A U-shaped plate is movably provided on the surface of the support plate, and the top of the U-shaped plate can contact the bottom of the front wheel.

[0012] Preferably, a cylinder is installed on the top of the support plate, the output end of the cylinder is fixedly connected to the top of the inner cavity of the U-shaped plate, and the inner wall surface of the U-shaped plate is slidably connected to the surface of the support plate.

[0013] Preferably, the connecting mechanism includes two cross bars C, one end of the cross bar C is fixedly connected to the adjacent vertical bar B, the top of the cross bar C close to the end of the U-shaped frame is fixedly connected to the vertical bar D, the top of the vertical bar D is provided with a cross bar D arranged parallel to the cross bar B, the bottom end of the cross bar D is fixedly connected to a mounting seat, and the mounting seat is fixedly connected to the top of the shock absorber.

[0014] Preferably, the bottom of the cross bar C is fixedly connected to a limiting rod, and the limiting rod extends to the front side of the cross bar C at one end close to the C-shaped frame. The front end of the limiting rod is detachably connected to the end of the C-shaped frame by a bolt.

[0015] Preferably, sliding rods are provided at both ends of the cross bar B, one end of the sliding rod is fixedly connected to the adjacent support plate, and a sliding sleeve is provided on the surface of the cross bar D, and the sliding sleeve is fixedly connected to the top of the vertical rod D.

[0016] Preferably, the pitch adjusting mechanism includes a dual-axis motor located below the rectangular frame, wherein the two output shafts of the dual-axis motor are fixedly connected to a rotating rod arranged parallel to the cross bar D, and the end of the rotating rod away from the dual-axis motor is rotatably connected to a support block A, the top of the support block A is fixedly connected to the bottom of the rectangular frame, the bottom of the rectangular frame is fixedly connected to two symmetrical support blocks B, a bidirectional screw A is rotatably connected between the two support blocks B, both sides of the surface of the bidirectional screw A are threadedly sleeved with a movable plate, the movable plate and the support plate are arranged in a one-to-one correspondence, the top of the movable plate is fixedly connected to the bottom of the corresponding support plate, the two vertical rods D are rotatably connected by a bidirectional screw B, both sides of the surface of the bidirectional screw B are threadedly sleeved with a movable block, the movable block and the cross bar D are arranged in a one-to-one correspondence, the top of the movable block is fixedly connected to the bottom of the corresponding cross bar D, the rotating rod and the bidirectional screw A, the bidirectional screw A and the bidirectional screw B are respectively connected by pulleys and belt transmission.

[0017] Preferably, the dual-axis motor is electrically connected to the controller, and a reinforcement plate is fixedly connected between the two support blocks A, and the dual-axis motor is installed on top of the reinforcement plate.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are: 1. The present invention comprises a supporting mechanism formed by a supporting assembly and an opening and closing assembly. The opening and closing assembly can be flipped open when the automobile steering system and the supporting mechanism are assembled. This not only facilitates the structural placement of the automobile steering system, but also expands the operable space, thereby helping to improve the assembly efficiency of the workers. 2. The present invention can adjust the distance between the two support plates and the mounting seat according to the distance between the two front wheels through the distance adjustment mechanism, and can adjust the height of the U-shaped plate according to the diameter of the front wheel through the cylinder, so that the support mechanism, the supporting wheel mechanism and the connecting mechanism can support the steering systems of different models of vehicles, thereby expanding the scope of application of the new energy vehicle electronic steering test bench; at the same time, the two support plates and the mounting seat are driven by a dual-axis motor to achieve the effect of energy saving and power saving, and can extend the service life when powered by batteries, which has the value of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the embodiment of the present invention assembled with the automobile steering system. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the embodiment of the present invention assembled with the automobile steering system. Figure 2 ; Figure 3 A schematic structural diagram of an automobile steering system according to an embodiment of the present invention; Figure 4 Schematic diagram of the structure of an embodiment of the present invention; Figure 5 This is a structural schematic diagram of an opening and closing assembly in an embodiment of the present invention in an open state; Figure 6 The structure diagram of the supporting wheel mechanism and the connecting mechanism after adjustment in the embodiment of the present invention is shown as follows: Figure 1 ; Figure 7 The structure diagram of the supporting wheel mechanism and the connecting mechanism after adjustment in the embodiment of the present invention is shown as follows: Figure 2 ; Figure 8 It is a structural schematic diagram of the supporting wheel mechanism and the distance adjustment mechanism according to an embodiment of the present invention.

[0021] In the figure: 1. Automobile steering system; 11. Steering wheel; 12. Steering column assembly; 13. Steering gear assembly; 14. Steering support; 15. Suspension; 16. Front wheel; 17. Shock absorber; 100. Support mechanism; 110. Support assembly; 111. Rectangular frame; 112. Vertical pole A; 113. Vertical pole B; 114. Mounting plate; 115. Crossbar A; 116. Vertical pole C; 117. Column; 118. Leg; 119. Moving wheel; 120. Opening and closing assembly; 121. U-shaped frame; 122. V-shaped plate; 200, supporting roller mechanism; 210, crossbar B; 211, sliding rod; 220, supporting plate; 230, U-shaped plate; 240, cylinder; 300, connecting mechanism; 310, crossbar C; 320, vertical pole D; 321, sliding sleeve; 330, crossbar D; 340, mounting seat; 350, limiting rod; 400, pitch adjustment mechanism; 410, dual-axis motor; 420, rotating rod; 430, support block A; 440, support block B; 450, bidirectional screw A; 460, movable plate; 470, bidirectional screw B; 480, movable block; 500, controller; 600, display; 700. Reinforcement plate. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Example

[0024] like Figures 1-8 As shown, a new energy vehicle electronic steering test bench according to an embodiment of the present invention includes a support mechanism 100 for supporting an automobile steering system 1, on which a connecting mechanism 300, a distance adjustment mechanism 400, a controller 500 and a display 600 are provided. The display 600 and the automobile steering system 1 are electrically connected to the controller 500 respectively; the automobile steering system 1 includes a steering wheel 11, a steering column assembly 12, a steering gear assembly 13, a steering support platform 14, a suspension 15, a front wheel 16 and a shock absorber 17. One end of the steering column assembly 12 is connected to the steering wheel 11, and the other end of the steering column assembly 12 is connected to the steering gear assembly 13. The steering support platform 14 is horizontally mounted on the steering gear assembly 13. A suspension 15 is fixedly connected to each side of the steering support platform 14, and a front wheel 16 is connected to each end of the steering gear assembly 13. The suspension 15 and the front wheel 16 are arranged in a one-to-one correspondence. The suspension 15 is connected to the corresponding front wheel 16. The shock absorber 17 is connected to one on each side opposite to the two front wheels 16; the support mechanism 100 is used to provide an installation basis for the steering platform 14, the suspension 15, the supporting roller mechanism 200, the connecting mechanism 300, the distance adjustment mechanism 400, the controller 500 and the display 600. The supporting roller mechanism 200 is arranged at the bottom of the inner cavity of the support mechanism 100 and is used to support the front wheels 16. The connecting mechanism 300 is arranged at the top of the support mechanism 100 and is used to support the shock absorber 17. The distance adjustment mechanism 400 is used to adjust the distance between the local components of the supporting roller mechanism 200 and the connecting mechanism 300 to adapt to the automobile steering system 1 with different front wheel spacings. The controller 500 is arranged at the front side of the top of the support mechanism 100 and can cooperate with the automobile steering system 1 to realize the test simulation of three steering systems. The display 600 is arranged at the rear side of the top of the support mechanism 100 and can intuitively monitor and display real-time data, indicators and trends to help quickly understand the overall situation of the data.

[0025] It should be noted that the specific working principle between the above-mentioned automobile steering system 1 and the controller 500 is consistent with an automobile steering system test bench disclosed in the existing announcement number CN108375480B. It combines the working principle knowledge of the wire-controlled steering system SBW, the electronic control steering system EPS, and the traditional mechanical steering system, and integrates the three into one steering system. At the same time, it can realize the conversion between the three steering systems according to different working conditions, which solves the problem of repeated purchase of steering system test benches and solves the faults that are prone to occur in the actual operation of the wire-controlled system. It is an existing technology, so it will not be described in detail in this technical solution. Example

[0026] like Figures 1-8 As shown, the electronic steering test bench for new energy vehicles provided in this embodiment is different from that in embodiment 1 in that: The support mechanism 100 includes a supporting assembly 110. An opening and closing assembly 120 is provided on the side of the top of the supporting assembly 110 away from the display 600. The controller 500 is provided on the opening and closing assembly 120. The supporting assembly 110 includes a rectangular frame 111. The front side of the top of the rectangular frame 111 is fixedly connected to two vertical poles A112. The back side of the top of the rectangular frame 111 is fixedly connected to a vertical pole B113 which is parallel to the vertical pole A112. There are four vertical poles B113 distributed in a rectangular array. The tops of the four vertical poles B113 are fixed together. A mounting plate 114 is connected to the top of the mounting plate 114. The display 600 is mounted on the top of the mounting plate 114. The front side of the inner cavity of the rectangular frame 111 is fixedly connected to a horizontal crossbar A115. Both sides of the top of the crossbar A115 are fixedly connected to vertical poles C116 that are parallel to the vertical poles A112. The top of the vertical pole C116 can be connected and fixed to the steering support 14. Both sides of the top of the rectangular frame 111 are fixedly connected to a column 117. The top of the column 117 can be connected and fixed to the suspension 15. Through the supporting assembly 11 0 can support the steering support 14 and the suspension 15, so that the automobile steering system 1 can be stably placed in the support mechanism 100 for subsequent steering test operations; the four corners of the bottom of the rectangular frame 111 are fixedly connected to a leg 118 in a vertical direction, and the bottom end of the leg 118 is installed with a moving wheel 119 with a brake pad. The leg 118 can support and lift the supporting assembly 110, and can provide installation space for some structures on the supporting assembly 110 to prevent some structures on the supporting assembly 110 from contacting the ground. The phenomenon of affecting the use of the surface occurs. The flexibility of the support mechanism 100 can be improved by moving the wheel 119, which makes it convenient to move the support mechanism 100 to the desired position, thereby improving the convenience of use; the opening and closing component 120 and the connecting mechanism 300 are respectively arranged in front and back between the vertical pole A112 and the front vertical pole B113, the supporting wheel mechanism 200 is arranged on the top of the rectangular frame 111, and the supporting wheel mechanism 200 is placed between the vertical pole C116 and the front vertical pole B113, and the distance adjustment mechanism 400 is arranged between the rectangular frame 111 and the connecting mechanism 300.

[0027] The opening and closing assembly 120 includes a C-shaped frame 121 rotatably connected between two vertical poles A112 via a rotating shaft. The end of the C-shaped frame 121 is detachably connected to the connecting mechanism 300. Two V-shaped plates 122 are fixedly connected to the inner wall surface of the C-shaped frame 121. A accommodating space for the upper end of the steering column assembly 12 is formed between the two V-shaped plates 122. The V-shaped plate 122 is fixedly connected to the upper end of the steering column assembly 12. The controller 500 is installed on the side of the inner cavity of the C-shaped frame 121 away from the V-shaped plate 122. When the automobile steering system 1 needs to be installed in the support mechanism 100, the C-shaped frame 121 can be unlocked and flipped open, thereby increasing the operating space for the staff and avoiding the phenomenon of difficulty in assembling the automobile steering system 1 and the support mechanism 100 due to space limitations.

[0028] The wheel supporting mechanism 200 includes two cross bars B210 fixedly connected to the top of the rectangular frame 111 and arranged in a front-to-back manner. The column 117 is located between the two cross bars B210, and one of the cross bars B210 is located below the U-shaped frame 121, and the other cross bar B210 is located below the connecting mechanism 300. A support plate 220 is provided on both sides of the surface of the rectangular frame 111. The cross bar B210 is provided between the two support plates 220. A U-shaped plate 230 is movably provided on the surface of the support plate 220. The top of the U-shaped plate 230 can contact the bottom of the front wheel 16. The wheel supporting mechanism 200 can provide a support base for the front wheel 16 and can bear the steering system of the vehicle. 1, thereby preventing all the weight from being accumulated on the upright pole C116 and the upright column 117, and helping to improve the supporting firmness of the supporting assembly 110; a cylinder 240 is installed on the top of the support plate 220, and the output end of the cylinder 240 is fixedly connected to the top of the inner cavity of the U-shaped plate 230. By starting the cylinder 240, the output end of the cylinder 240 can drive the U-shaped plate 230 to move up and down, thereby being able to support front wheels 16 with different wheel diameters. The inner wall surface of the U-shaped plate 230 is slidably connected to the surface of the support plate 220, which can limit the U-shaped plate 230, so that the U-shaped plate 230 can move up and down stably, avoiding shaking or even displacement.

[0029] The connecting mechanism 300 includes two horizontally arranged cross bars C310, one end of the cross bar C310 is fixedly connected to the adjacent vertical bar B113, and the top end of the cross bar C310 close to the U-shaped frame 121 is fixedly connected to the vertical bar D320 in a vertical direction. The top of the vertical bar D320 is provided with a cross bar D330 arranged parallel to the cross bar B210, and the bottom end of the cross bar D330 is fixedly connected to the mounting seat 340, and the mounting seat 340 is fixedly connected to the top of the shock absorber 17. The connecting mechanism 300 can provide an installation foundation for the shock absorber 17, so that a shock absorption system can be formed between the shock absorber 17 and the connecting mechanism 300; the bottom of the cross bar C310 is fixedly connected to the limit rod 350, and the limit rod 350 extends to the front side of the cross bar C310 at one end close to the U-shaped frame 121, and the front end of the limit rod 350 is detachably connected to the end of the U-shaped frame 121 by a bolt. The limit rod 350 can limit the end of the U-shaped frame 121 to prevent the U-shaped frame 121 from rotating excessively and directly rotating into the inner cavity of the supporting assembly 110; both ends of the cross bar B210 are slidably penetrated by sliding rods 211, and one end of the sliding rod 211 is fixedly connected to the adjacent support plate 220 to realize the movable connection between the support plate 220 and the cross bar B210, and the support plate 220 can adjust its horizontal position along the length direction of the cross bar B210, and the surface sliding sleeve of the cross bar D330 is provided with a sliding sleeve 321, and the sliding sleeve 321 is fixedly connected to the top end of the vertical rod D320 to realize the movable connection between the cross bar D330 and the vertical rod D320, and the mounting seat 340 can adjust its horizontal position along the length direction of the cross bar D330, and the cross bar D330 and the cross bar B210 are arranged parallel to each other, so that the horizontal position movement direction of the support plate 220 and the mounting seat 340 are consistent.

[0030] The distance adjustment mechanism 400 includes a dual-axis motor 410 located below the rectangular frame 111. The two output shafts of the dual-axis motor 410 are fixedly connected to a rotating rod 420 arranged parallel to the crossbar D330. The end of the rotating rod 420 away from the dual-axis motor 410 is rotatably connected to a support block A430 through a bearing. The top of the support block A430 is fixedly connected to the bottom of the rectangular frame 111. The bottom of the rectangular frame 111 is fixedly connected to two symmetrical support blocks B440. The two support blocks B440 are rotatably connected through a bearing. A bidirectional screw A450 is connected to the rotating rod 420 in parallel with each other, and a movable plate 460 is threadedly sleeved on both sides of the surface of the bidirectional screw A450. The movable plate 460 is arranged in a one-to-one correspondence with the support plate 220. The top of the movable plate 460 is fixedly connected to the bottom of the corresponding support plate 220. A bidirectional screw B470 is rotatably connected to the bidirectional screw A450 in parallel with each other through a bearing between the two vertical rods D320. A movable block 480 is threadedly sleeved on both sides of the surface of the bidirectional screw B470. The movable block 480 is arranged in a one-to-one correspondence with the cross bar D330. The top of the movable block 480 is fixedly connected to the bottom of the corresponding cross bar D330. The rotating rod 420 and the bidirectional screw A450, and the bidirectional screw A450 and the bidirectional screw B470 are connected through pulleys and belt transmissions respectively. By starting the dual-axis motor 410, the output shaft of the dual-axis motor 410 can eventually drive the two support plates 220 and the two mounting seats 340 to move toward or away from each other, thereby being able to adjust the two support plates 220 according to the distance between the two front wheels 16. 20 and the distance between the two mounting seats 340 to improve the applicability of the supporting wheel mechanism 200 and the connecting mechanism 300; the dual-axis motor 410 is electrically connected to the controller 500, and a reinforcement plate 700 is fixedly connected between the two support blocks A430. The dual-axis motor 410 is installed on the top of the reinforcement plate 700. The working state or parameters of the dual-axis motor 410 can be adjusted by the controller 500. The reinforcement plate 700 can provide a support base for the dual-axis motor 410 to improve the stability of the dual-axis motor 410 during operation.

[0031] The controller 500 is equipped with a synchronous compensation control module, which is used to dynamically control the operation of the pitch adjustment mechanism. The synchronous compensation control module executes the following control equation:

[0032] in: : Motor torque compensation (N·m); : displacement deviation (mm); : Load torque difference between left and right sides (N·m); : system time constant (s); : Nonlinear correction index (0.8-1.2); , , : dynamic adjustment coefficient; is the displacement bias weight (0.3-0.5); is the torque-displacement coupling integral (0.1-0.2); It is nonlinear differential compensation (0.05-0.1).

[0033] For example, when adjusting the wheelbase: 1. The controller 500 collects the displacement sensor data of the left and right support plates 220 in real time ( ) and motor torque data ( , ); 2. Calculate the current displacement deviation ; 3. Measure the torque difference ; 4. Substitute parameters: , , , , ; 5. Calculated ; 6. Output compensation torque to the dual-axis motor 410 to achieve dynamic balance.

[0034] Technical effect: Compared with traditional PID control, the wheelbase adjustment synchronization error is greatly reduced; it can automatically compensate for the effects of mechanical wear and load mutations; it reduces invalid power consumption through torque difference feedback, and significantly reduces energy consumption; safety protection: when Emergency braking is triggered when the threshold is exceeded.

[0035] This equation has been verified through MATLAB / Simulink simulation and demonstrated excellent performance in step response tests, with overshoot less than 3% and adjustment time less than 1.2s. It is particularly suitable for electromechanical coupling systems such as new energy vehicle steering system test benches that require high-precision synchronous adjustment.

[0036] Working principle: First, the dual-axis motor 410 is started, and the output shaft of the dual-axis motor 410 drives the rotating rod 420 to rotate. The rotating rod 420 drives the bidirectional screw A450 and the bidirectional screw B470 to rotate synchronously through the pulley and the belt. The bidirectional screw A450 drives the two movable plates 460 on its surface to move toward or away from each other, and the bidirectional screw B470 drives the two movable blocks 480 on its surface to move toward or away from each other. The movable plate 460 drives the support plate 220, the U-shaped plate 230 and the cylinder 240 to move synchronously. The support plate 220 The slide bar 211 is driven to slide in the inner cavity of the cross bar B210, and the movable block 480 drives the cross bar D330 and the mounting seat 340 to move synchronously. The cross bar D330 slides in the inner cavity of the sliding sleeve 321, and the distance between the two U-shaped plates 230 and the two mounting seats 340 can be adjusted according to the distance between the two front wheels 16. The cylinder 240 is started, and the output end of the cylinder 240 drives the U-shaped plate 230 to slide on the surface of the support plate 220, so that the distance between the U-shaped plate 230 and the support plate 220 can be adjusted according to the diameter of the front wheel 16. Then, unscrew the bolts between the C-shaped frame 121 and the limiting rod 350 to unlock the C-shaped frame 121, and flip the unlocked C-shaped frame 121 open, so that the C-shaped frame 121 drives the V-shaped plate 122 and the controller 500 to rotate synchronously until the C-shaped frame 121 rotates to the front side of the vertical pole A112. At this time, the connection mechanism 300 and the vertical pole A112 are open, without structural obstruction, thereby facilitating the placement and assembly of the steering support 14 and the suspension 15, completing the steering support 14 and the vertical pole C116, the suspension 15 and After the connection between the columns 117 is fixed, the steering column assembly 12 is connected to the steering gear assembly 13, the front wheel 16 is placed on the U-shaped plate 230 and connected to the suspension 15, and the shock absorber 17 is connected between the front wheel 16 and the mounting seat 340. Alternatively, the assembled automobile steering system 1, excluding the steering wheel 11, can be directly placed inside the support assembly 110 through the gap between the connecting mechanism 300 and the column A112. After that, the steering support 14 is connected to the column C116, the suspension 15 is connected to the column 117, and the shock absorber 17 is connected to the mounting seat 340. Finally, the U-shaped frame 121 is flipped over and closed so that the end of the U-shaped frame 121 contacts the limit rod 350, and the U-shaped frame 121 is connected to the limit rod 350 by bolts to achieve the locking operation of the U-shaped frame 121. At this time, the V-shaped plate 122 can be connected to the steering column assembly 12, and then the steering wheel 11 is installed on the steering column assembly 12. The assembly operation of the automobile steering system 1 and the support mechanism 100 is completed, and then the electronic steering test operation of the automobile steering system 1 can be performed.

[0037] The above specific embodiments will allow those skilled in the art to easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific embodiments. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to implement different technical solutions.

Claims

1. A new energy vehicle electronic steering test bench, characterized in that: include: A support mechanism (100) for supporting an automobile steering system (1), provided with a connecting mechanism (300), a distance adjustment mechanism (400), a controller (500), and a display (600), wherein the display (600) and the automobile steering system (1) are electrically connected to the controller (500), respectively; The automobile steering system (1) comprises a steering wheel (11), a steering column assembly (12), a steering gear assembly (13), a steering support (14), a suspension (15), a front wheel (16), and a shock absorber (17), wherein one end of the steering column assembly (12) is connected to the steering wheel (11), the other end of the steering column assembly (12) is connected to the steering gear assembly (13), the steering support (14) is mounted on the steering gear assembly (13), one suspension (15) is fixedly connected to each of the two sides of the steering support (14), one front wheel (16) is connected to each of the two ends of the steering gear assembly (13), the suspension (15) and the front wheel (16) are arranged in a one-to-one correspondence, the suspension (15) is connected to the corresponding front wheel (16), and one shock absorber (17) is connected to each of the two front wheels (16) on opposite sides.

2. The new energy vehicle electronic steering test bench according to claim 1 is characterized in that: The support mechanism (100) is used to provide an installation base for the steering platform (14), the suspension (15), the supporting wheel mechanism (200), the connecting mechanism (300), the distance adjustment mechanism (400), the controller (500) and the display (600); the supporting wheel mechanism (200) is arranged at the bottom of the inner cavity of the support mechanism (100) and is used to support the front wheel (16); the connecting mechanism (300) is arranged at the top of the support mechanism (100) and is used to support the shock absorber (17); the distance adjustment mechanism (400) is used to adjust the distance between the supporting wheel mechanism (200) and the local components of the connecting mechanism (300) to adapt to automobile steering systems (1) with different front wheel distances; the controller (500) is arranged at the front side of the top of the support mechanism (100); and the display (600) is arranged at the rear side of the top of the support mechanism (100).

3. The new energy vehicle electronic steering test bench according to claim 2 is characterized in that: The support mechanism (100) comprises a supporting assembly (110), an opening and closing assembly (120) is provided on a side of the top of the supporting assembly (110) away from the display (600), and the controller (500) is provided on the opening and closing assembly (120); The supporting assembly (110) comprises a rectangular frame (111), the front side of the top of the rectangular frame (111) is fixedly connected to two vertical poles A (112), the rear side of the top of the rectangular frame (111) is fixedly connected to a vertical pole B (113) which is parallel to the vertical pole A (112), four vertical poles B (113) are distributed in a rectangular array, and the tops of the four vertical poles B (113) are fixedly connected to a mounting plate (114), and the display (600) is mounted on the mounting plate. The top of the plate (114) is fixedly connected to the front side of the inner cavity of the rectangular frame (111) with a crossbar A (115), and both sides of the top of the crossbar A (115) are fixedly connected to vertical poles C (116) arranged in parallel with the vertical pole A (112), and the top of the vertical pole C (116) can be connected and fixed to the steering support (14), and both sides of the top of the rectangular frame (111) are fixedly connected to a column (117), and the top of the column (117) can be connected and fixed to the suspension (15); The four corners of the bottom of the rectangular frame (111) are all fixedly connected to a leg (118) in a vertical direction, and the bottom end of the leg (118) is installed with a moving wheel (119) with a brake pad; The opening and closing assembly (120) and the connecting mechanism (300) are respectively arranged front and back between the vertical pole A (112) and the vertical pole B (113) located at the front side; the supporting wheel mechanism (200) is arranged on the top of the rectangular frame (111), and the supporting wheel mechanism (200) is placed between the vertical pole C (116) and the vertical pole B (113) located at the front side; and the distance adjustment mechanism (400) is arranged between the rectangular frame (111) and the connecting mechanism (300).

4. The new energy vehicle electronic steering test bench according to claim 3 is characterized in that: The opening and closing assembly (120) includes a U-shaped frame (121) rotatably connected between two upright poles A (112), the end of the U-shaped frame (121) is detachably connected to the connecting mechanism (300), two V-shaped plates (122) are fixedly connected to the inner wall surface of the U-shaped frame (121), and a receiving space for the upper end of the steering column assembly (12) is formed between the two V-shaped plates (122), the V-shaped plate (122) is fixedly connected to the upper end of the steering column assembly (12), and the controller (500) is installed on a side of the inner cavity of the U-shaped frame (121) away from the V-shaped plate (122).

5. The new energy vehicle electronic steering test bench according to claim 4 is characterized in that: The wheel support mechanism (200) includes two cross bars B (210) fixedly connected to the top of the rectangular frame (111), the column (117) is located between the two cross bars B (210), and one of the cross bars B (210) is located below the U-shaped frame (121), and the other cross bar B (210) is located below the connecting mechanism (300). A plate (220) is provided on both sides of the surface of the rectangular frame (111). The cross bars B (2 10) is provided between two support plates (220), the surface of the support plate (220) is movably provided with a U-shaped plate (230), the top of the U-shaped plate (230) can contact the bottom of the front wheel (16), the top of the support plate (220) is installed with a cylinder (240), the output end of the cylinder (240) is fixedly connected to the top of the inner cavity of the U-shaped plate (230), and the inner wall surface of the U-shaped plate (230) is slidably connected to the surface of the support plate (220).

6. The new energy vehicle electronic steering test bench according to claim 5 is characterized in that: The connecting mechanism (300) includes two cross bars C (310), one end of the cross bar C (310) is fixedly connected to the adjacent vertical bar B (113), the top end of the cross bar C (310) close to the U-shaped frame (121) is fixedly connected to the vertical bar D (320), the top end of the vertical bar D (320) is provided with a cross bar D (330) arranged parallel to the cross bar B (210), the bottom end of the cross bar D (330) is fixedly connected to a mounting seat (340), and the mounting seat (340) is fixedly connected to the top of the shock absorber (17).

7. The new energy vehicle electronic steering test bench according to claim 6, characterized in that: The bottom of the crossbar C (310) is fixedly connected to a limiting rod (350), and one end of the limiting rod (350) close to the U-shaped frame (121) extends to the front side of the crossbar C (310), and the front end of the limiting rod (350) is detachably connected to the end of the U-shaped frame (121) by a bolt.

8. The new energy vehicle electronic steering test bench according to claim 6, characterized in that: Both ends of the crossbar B (210) are slidably penetrated by sliding rods (211), one end of the sliding rod (211) is fixedly connected to the adjacent support plate (220), and the surface sliding sleeve of the crossbar D (330) is provided with a sliding sleeve (321), and the sliding sleeve (321) is fixedly connected to the top of the vertical rod D (320).

9. The new energy vehicle electronic steering test bench according to claim 6, characterized in that: The pitch adjustment mechanism (400) includes a dual-axis motor (410) located below the rectangular frame (111), and both output shafts of the dual-axis motor (410) are fixedly connected to a rotating rod (420) arranged in parallel with the crossbar D (330). The end of the rotating rod (420) away from the dual-axis motor (410) is rotatably connected to a support block A (430), and the top of the support block A (430) is fixedly connected to the bottom of the rectangular frame (111). The bottom of the rectangular frame (111) is fixedly connected to two symmetrical support blocks B (440), and a bidirectional screw rod A (450) is rotatably connected between the two support blocks B (440). Both sides of the surface of the bidirectional screw rod A (450) are threadedly sleeved with a movable plate (46 0), the movable plate (460) and the support plate (220) are arranged in a one-to-one correspondence, the top of the movable plate (460) is fixedly connected to the bottom of the corresponding support plate (220), and a bidirectional screw rod B (470) is rotatably connected between the two vertical rods D (320) through a bearing, and a movable block (480) is threadedly sleeved on both sides of the surface of the bidirectional screw rod B (470), and the movable block (480) and the cross bar D (330) are arranged in a one-to-one correspondence, and the top of the movable block (480) is fixedly connected to the bottom of the corresponding cross bar D (330), and the rotating rod (420) and the bidirectional screw rod A (450), and the bidirectional screw rod A (450) and the bidirectional screw rod B (470) are respectively connected through pulleys and belt transmission.

10. The new energy vehicle electronic steering test bench according to claim 9, characterized in that: The dual-axis motor (410) is electrically connected to the controller (500), and a reinforcement plate (700) is fixedly connected between the two support blocks A (430), and the dual-axis motor (410) is installed on the top of the reinforcement plate (700).

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