Steering simulation device for bench test

Abstract

The invention relates to the technical field of vehicle testing, in particular to a steering simulation device for a bench test, which comprises a base, a mounting seat, a wheel simulation mechanism, a steering mechanism and an adjusting unit, the mounting seat is mounted on the base; the two wheel simulation mechanisms are symmetrically arranged, and each wheel simulation mechanism comprises a simulation motor and an adjusting rod; the two simulation motors are synchronously close to each other or far away from each other; the adjusting rod is hinged with the simulation motor; the steering mechanism comprises a steering transverse rod, the steering transverse rod comprises a transmission rod and two hinge rods hinged to the two ends of the transmission rod in a spherical mode respectively, the adjusting unit can limit or allow free rotation of the hinge rods and the transmission rod, the position, perpendicular to the horizontal direction of the transmission rod, of the mounting base is adjustable, and the length of the adjusting rod is adjustable. The two adjusting rods are arranged to adjust the positions of the two simulation motors, so that the distance between the two simulation motors, the two adjusting rods and the steering cross rod form quadrilateral structures of different shapes, the steering parameters of the vehicle under different steering structures can be simulated, and the simulation result is more comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle testing, and in particular to a steering simulation device for bench testing. Background Art

[0002] The car steering system can change the direction of the car according to the driver's wishes. It can also allow the driver to use this mechanism to deflect the steering wheel in the opposite direction when the car's steering wheel is automatically deflected by the road interference and changes the driving direction, so as to restore the car to its original driving direction. Undoubtedly, the car steering system is crucial to the driving safety of the car.

[0003] In order to determine whether a car's steering system is qualified, the prior art often uses a car steering bench test method to simulate it. However, due to the single steering structure of the bench, the simulated data is single and the result is not comprehensive enough. Summary of the invention

[0004] The invention provides a steering simulation device for bench test, so as to solve the problem that the single steering structure of the existing bench test affects the simulation result.

[0005] A steering simulation device for bench testing of the present invention adopts the following technical solution:

[0006] A steering simulation device for bench test, comprising a base, a mounting seat, a wheel simulation mechanism, a steering mechanism and an adjustment unit; the mounting seat is mounted on the base; there are two wheel simulation mechanisms, which are symmetrically arranged in the horizontal direction, including a simulation motor and an adjustment rod; the two simulation motors are both slidably mounted on the mounting seat, and are synchronously close to or away from each other; the adjustment rod is hinged with the simulation motor around a vertical axis, and can rotate under the drive of the simulation motor, and rotate relative to the simulation motor when the simulation motor is powered off; the length of the adjustment rod is adjustable; the steering mechanism comprises a steering wheel, a steering system and a steering crossbar, and the steering crossbar is horizontal Installed on the base, the steering crossbar includes a transmission rod and two articulated rods respectively articulated with balls at both ends of the transmission rod. The transmission rod is parallel to the distribution direction of the two simulation motors and is restricted by the base to only move along its axial direction. The other end of each articulated rod is respectively articulated with an adjustment rod around a vertical axis. The steering wheel is transmitted to the transmission rod through the steering system; the mounting seat is adjustable in the horizontal direction perpendicular to the transmission rod; the adjustment unit has a debugging state and a simulation state. In the debugging state, the articulated rod is coaxial with the transmission rod and the free rotation of the articulated rod and the transmission rod is restricted; in the simulation state, the articulated rod is allowed to rotate relative to the transmission rod.

[0007] Optionally, there are two adjustment units, corresponding to two articulated rods respectively, and each adjustment unit includes a positioning sleeve and a reset block; two reset grooves corresponding to the adjustment units are provided on the base, and the reset grooves include a wide groove and a narrow groove distributed in sequence along the axial direction of the transmission rod, the width of the wide groove in a direction perpendicular to the axial direction of the transmission rod is greater than the width of the narrow groove in a direction perpendicular to the axial direction of the transmission rod, and the wide groove and the narrow groove are connected through two inclined transitions; the positioning sleeve is slidably installed on the articulated rod along the axial direction of the articulated rod, and the reset block is vertically arranged and fixedly connected to the positioning sleeve; when the adjustment unit is in a debugging state, the reset block cooperates with the narrow groove, and the articulated rod is kept coaxial with the transmission rod through the positioning sleeve, and the free rotation of the articulated rod and the transmission rod is restricted; when the adjustment unit is in a simulation state, the reset block cooperates with the wide groove, allowing the articulated rod to rotate relative to the transmission rod.

[0008] Optionally, a transmission unit is provided between the two adjustment units, and the transmission unit enables the reset blocks of the two adjustment units to synchronously engage with or disengage from the corresponding narrow slots.

[0009] Optionally, the positioning sleeve and the reset block are connected by a connecting rod perpendicular to the hinged rod; the transmission unit includes a first gear, two sliding blocks and two first racks, the two first racks are parallel to the transmission rod and are slidably installed on the base along their own axial directions; each sliding block is hinged to a first rack around a vertical axis, and is slidably installed on the connecting rod along a horizontal direction perpendicular to the hinged rod; the first gear is rotatably installed on the base, and is located between the two first racks, and is meshed with both first racks.

[0010] Optionally, a torsion spring is provided between the first rack and the sliding block, and the torsion spring forces the connecting rod where the sliding block is located to be perpendicular to the first rack.

[0011] Optionally, the adjusting rod includes an outer tube, an inner tube and a second gear, the outer tube and the inner tube are both square tubes and are sleeved, and the outer tube is hinged to the simulation motor around a vertical axis; two second racks are arranged in the inner tube, which are opposite to each other and parallel to the sleeved direction of the outer tube and the inner tube, and the two second racks partially overlap in the vertical direction; the second gear is rotatably installed on the outer tube around the vertical axis, and can move up and down relative to the outer tube, and when the second gear is engaged with one of the second racks, the rotation of the second gear drives the inner tube to move relative to the outer tube, so that the adjusting rod is extended or shortened; when the second gear is engaged with the two second racks at the same time, the movement of the inner tube relative to the outer tube is restricted, thereby locking the length of the adjusting rod.

[0012] Optionally, a second elastic member is provided between the second gear and the outer tube, and the second elastic member causes the second gear to engage with the two second racks at the same time; a wedge block sliding in the horizontal direction is provided on the outer tube, and when the wedge block moves, it can push the second gear to move in the vertical direction.

[0013] Optionally, a track perpendicular to the transmission rod is provided on the base, and the mounting seat is slidably mounted on the track.

[0014] Optionally, a rotating motor and a double-headed screw are provided on the mounting seat. The double-headed screw is parallel to the transmission rod and is rotatably mounted on the mounting seat. The double-headed screw consists of two coaxial screw sections with opposite rotation directions. Each screw section is sleeved with a support seat, which is slidably mounted on the mounting seat along the axial direction of the double-headed screw and cooperates with the screw spirally. Each simulation motor is mounted on a support seat; the rotating motor is used to drive the double-headed screw to rotate.

[0015] Optionally, a sleeve is disposed outside the transmission rod, the sleeve is coaxial with the transmission rod and fixed to the base, the transmission rod can move axially relative to the sleeve and is restricted by the sleeve from moving or rotating in other directions; the steering system is connected to the transmission rod through the sleeve for transmission.

[0016] The beneficial effects of the present invention are as follows: the steering simulation device for bench testing of the present invention adjusts the state between the articulated rod and the transmission rod by setting an adjustment unit, and makes the position of the mounting seat perpendicular to the horizontal direction of the transmission rod adjustable, and the length of the adjustment rod is adjustable, so as to facilitate the adjustment of the positions of the two simulation motors, so that the spacing between the two simulation motors, the two adjustment rods and the steering crossbar form quadrilateral structures of different shapes, thereby enabling the simulation device to simulate the steering parameters of vehicles under different steering structures, and the simulation results are more comprehensive, with high flexibility and a wide range of applications.

[0017] Furthermore, by providing a reset groove, the two adjustment units can quickly switch between different states, making it easier for the simulation device to switch to other steering structures for simulation testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a steering simulation device for bench testing of the present invention;

[0020] Figure 2 It is a top view of the overall structure of an embodiment of a steering simulation device for bench testing of the present invention;

[0021] Figure 3 A schematic diagram of an adjusting unit of an embodiment of a steering simulation device for bench testing of the present invention in a simulation state;

[0022] Figure 4 It is a partial structural schematic diagram of an embodiment of a steering simulation device for bench testing of the present invention;

[0023] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0024] Figure 6 It is a structural schematic diagram of an adjusting rod in an embodiment of a steering simulation device for bench testing of the present invention;

[0025] Figure 7 It is a structural schematic diagram of a steering crossbar and a steering system in an embodiment of a steering simulation device for bench testing of the present invention;

[0026] Figure 8 It is a partial structural schematic diagram of an adjusting unit and a transmission unit in an embodiment of a steering simulation device for bench testing of the present invention;

[0027] In the figure: 100, base; 110, reset groove; 120, track; 200, mounting seat; 210, rotating motor; 220, double-headed screw; 230, supporting seat; 300, wheel simulation mechanism; 310, simulation motor; 320, adjusting rod; 321, outer tube; 322, inner tube; 323, second gear; 324, second rack; 325, elastic member; 326, wedge; 400, steering mechanism; 410, steering wheel; 420, steering system; 430, steering crossbar; 431, transmission rod; 432, articulated rod; 433, sleeve; 500, adjusting unit; 510, positioning sleeve; 520, reset block; 530, connecting rod; 600, transmission unit; 610, first gear; 620, sliding block; 630, first rack. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] An embodiment of a steering simulation device for bench testing (hereinafter referred to as a simulation device) of the present invention is as follows: Figures 1 to 8 As shown, it includes a base 100 , a mounting seat 200 , a wheel simulation mechanism 300 , a steering mechanism 400 and an adjustment unit 500 .

[0030] The mounting seat 200 is mounted on the base 100 .

[0031] There are two wheel simulation mechanisms 300, which are symmetrically arranged in the horizontal direction, and include simulation motors 310 and adjustment rods 320; the two simulation motors 310 are slidably mounted on the mounting seat 200, and are synchronously moved closer to or away from each other. The adjustment rod 320 is hinged with the simulation motor 310 around a vertical axis, and can rotate under the drive of the simulation motor 310, and rotate relative to the simulation motor 310 when the simulation motor 310 is powered off; the length of the adjustment rod 320 is adjustable.

[0032] The steering mechanism 400 includes a steering wheel 410, a steering system 420 and a steering crossbar 430. The steering crossbar 430 is horizontally mounted on the base 100. The steering crossbar 430 includes a transmission rod 431 and two articulated rods 432 respectively articulated with balls at both ends of the transmission rod 431. The transmission rod 431 is parallel to the distribution direction of the two simulation motors 310 and is restricted by the base 100 to move only along its axial direction. The other end of each articulated rod 432 is respectively articulated with an adjustment rod 320 around a vertical axis. The steering wheel 410 is driven by the steering system 420 and the transmission rod 431.

[0033] The mounting seat 200 is positionally adjustable in a horizontal direction perpendicular to the transmission rod 431 .

[0034] The adjustment unit 500 has a debugging state and a simulation state. In the debugging state, the adjustment unit 500 makes the hinge rod 432 coaxial with the transmission rod 431 and restricts the free rotation of the hinge rod 432 and the transmission rod 431; in the simulation state, the hinge rod 432 is allowed to rotate relative to the transmission rod 431.

[0035] The steering system 420 is a prior art, and its main function is to transmit the rotation of the steering wheel 410 to make the steering crossbar 430 move along the axial direction of the transmission rod 431, or to transmit the axial movement of the transmission rod 431 to make the steering wheel 410 rotate.

[0036] In the initial state, the symmetry center of the two simulation motors 310 and the center of the transmission rod 431 are located on the same straight line perpendicular to the transmission rod 431, and the positions of the two simulation motors 310 represent the positions of the two front wheels. When the wheel simulation mechanism 300 adjusts the distance between the two simulation motors 310, the adjustment unit 500 is in the adjustment state, and the articulated rod 432 is coaxial with the transmission rod 431 and is restricted from relative rotation. In the process of the two simulation motors 310 moving away from or approaching each other, the length of the adjustment rod 320 changes accordingly. When the distance between the two simulation motors 310 is greater than the length of the steering crossbar 430, the spacing between the two simulation motors 310, the two adjustment rods 320 and the steering crossbar 430 form an anti-Ackerman steering trapezoid. When the distance between the two simulation motors 310 is equal to the length of the steering crossbar 430, the spacing between the two simulation motors 310, the two adjustment rods 320 and the steering crossbar 430 form a rectangle. When the distance between the two simulation motors 310 is less than the length of the steering crossbar 430, the spacing between the two simulation motors 310, the two adjustment rods 320 and the steering crossbar 430 form an Ackerman steering trapezoid. Before the actual simulation, the spacing between the two simulation motors 310 can be adjusted as needed so as to obtain the working conditions of the wheels in different states through simulation. After determining the positions of the two simulation motors 310, the lengths of the two adjustment rods 320 are locked, and the adjustment unit 500 is switched to the simulation state. At this time, the steering wheel 410 can be rotated so that the steering wheel 410 drives the steering transmission rod 431 to move axially through the steering system 420, and the transmission rod 431 drives the two adjustment rods 320 to rotate through the articulated rod 432. The rotation angles of the two wheels are derived according to the angles of rotation of the two adjustment rods 320, and then the rotation data of the wheels when the steering wheel 410 rotates are obtained. Or start the two simulation motors 310 to rotate the same or different angles, the two simulation motors 310 drive the transmission rod 431 to move through the adjustment rod 320 and the hinge rod 432 respectively, and then the transmission rod 431 drives the steering wheel 410 to rotate through the steering system 420, and then obtains the rotation data of the steering wheel 410 when the wheel rotates.

[0037] By setting the adjustment unit 500 to adjust the state between the articulated rod 432 and the transmission rod 431, the positions of the two simulation motors 310 can be adjusted, so that the distance between the two simulation motors 310, the two adjustment rods 320 and the steering crossbar 430 form quadrilateral structures of different shapes, thereby enabling the simulation device to simulate the steering parameters of vehicles under different steering structures, with high flexibility and a wide range of applications.

[0038] In this embodiment, there are two adjustment units 500, corresponding to the two hinged rods 432 respectively, and each adjustment unit 500 includes a positioning sleeve 510 and a reset block 520; two reset grooves 110 corresponding to the adjustment units 500 are opened on the base 100, and the two reset grooves 110 are symmetrically arranged about the center of the transmission rod 431. Each reset groove 110 includes a wide groove and a narrow groove distributed in sequence along the axial direction of the transmission rod 431, the width of the wide groove in the direction perpendicular to the axial direction of the transmission rod 431 is greater than the width of the narrow groove in the direction perpendicular to the axial direction of the transmission rod 431, and the wide groove is connected to the narrow groove through two inclined transitions; the positioning sleeve 510 is slidably installed on the hinge rod 432 along the axial direction of the hinge rod 432, and the reset block 520 is vertically arranged and fixedly connected to the positioning sleeve 510; when the adjustment unit 500 is in the debugging state, the reset block 520 cooperates with the narrow groove, and the hinge rod 432 is kept coaxial with the transmission rod 431 through the positioning sleeve 510, and the rotation of the hinge rod 432 and the transmission rod 431 is limited; when the adjustment unit 500 is in the simulation state, the reset block 520 cooperates with the wide groove, allowing the hinge rod 432 to rotate relative to the transmission rod 431. Among them, the narrow groove is a rectangular groove parallel to the transmission rod 431, and the reset block 520 is a rectangular block adapted to the rectangular groove. When the reset block 520 cooperates with the narrow groove, it contacts the narrow groove surface, so that the reset block 520 drives the hinge rod 432 to rotate to a state parallel to the transmission rod 431; and by setting the spacing between the narrow groove and the transmission rod 431 in a direction perpendicular to the axial direction of the transmission rod 431, when the reset block 520 cooperates with the narrow groove, the positioning sleeve 510 makes the hinge rod 432 and the transmission rod 431 just coaxial.

[0039] By providing the reset groove 110 , the two adjustment units 500 can quickly switch between different states, making it easier for the simulation device to switch to other steering structures for simulation testing.

[0040] In this embodiment, a transmission unit 600 is disposed between the two adjustment units 500 , and the transmission unit 600 enables the reset blocks 520 of the two adjustment units 500 to be synchronously engaged with or disengaged from the corresponding narrow slots.

[0041] In this embodiment, the positioning sleeve 510 and the reset block 520 are connected by a connecting rod 530 perpendicular to the hinge rod 432; the transmission unit 600 includes a first gear 610, two sliding blocks 620 and two first racks 630, the two first racks 630 are parallel to the transmission rod 431 and are slidably installed on the base 100 along their own axial direction; each sliding block 620 is hinged with a first rack 630 around a vertical axis, and is slidably installed on the connecting rod 530 along a horizontal direction perpendicular to the hinge rod 432; the first gear 610 is rotatably installed on the base 100, and is located between the two first racks 630 and meshes with the two first racks 630. By rotating the first gear 610, the two first racks 630 move in opposite directions, and then the two first racks 630 drive the two reset blocks 520 to synchronously engage or disengage with the corresponding narrow grooves through the sliding blocks 620 and the connecting rod 530. Or one of the first racks 630 is moved, so that the other first rack 630 is synchronously moved in the opposite direction under the transmission of the first gear 610, thereby making the two reset blocks 520 synchronously engage with or disengage from the corresponding narrow grooves.

[0042] In some other embodiments, the first gear 610 of the transmission unit 600 can be replaced by a retractable intermediate rod, and the two first racks 630 can be replaced by a synchronization rod. The two synchronization rods are hinged to the intermediate rod around a vertical axis, and the intermediate rod is rotatably installed on the base 100 around the vertical axis. The two synchronization rods are parallel to the transmission rod 431 and are restricted by the base 100 to only move along their axial direction; by rotating the intermediate rod, the two synchronization rods can be synchronously moved closer to or away from each other, and then the synchronization rod drives the reset blocks 520 of the two adjustment units 500 to synchronously engage or disengage with the corresponding narrow grooves through the sliding block 620 and the connecting rod 530.

[0043] In some other embodiments, a torsion spring is provided between the first rack 630 and the sliding block 620, and the torsion spring forces the connecting rod 530 where the sliding block 620 is located to be perpendicular to the first rack 630, thereby causing the positioning sleeve 510 connected to the connecting rod 530 to rotate the hinge rod 432 to be coaxial with the transmission rod 431, and when the hinge rod 432 is not subjected to an external force, there is a tendency to restore the coaxiality with the transmission rod 431. Among them, the torsion of the torsion spring is small, and the influence on the simulation process is small.

[0044] In this embodiment, the adjusting rod 320 includes an outer tube 321, an inner tube 322 and a second gear 323. The outer tube 321 and the inner tube 322 are both square tubes and are sleeved. The outer tube 321 and the simulation motor 310 are hinged around the vertical axis. The inner tube 322 is provided with two second racks 324 that are relatively arranged and parallel to the sleeved direction of the outer tube 321 and the inner tube 322. The two second racks 324 partially overlap in the vertical direction. The second gear 323 is rotatably installed on the outer tube 321 around a vertical axis and can move up and down relative to the outer tube 321. When the second gear 323 is engaged with one of the second racks 324, the second gear 323 rotates to drive the inner tube 322 to move relative to the outer tube 321, so that the adjustment rod 320 is extended or shortened, or the inner tube 322 moves relative to the outer tube 321, so that the second gear 323 rotates accordingly; when the second gear 323 is engaged with two second racks 324 at the same time, the inner tube 322 is restricted from moving relative to the outer tube 321, thereby locking the length of the adjustment rod 320.

[0045] In this embodiment, an elastic member 325 is provided between the second gear 323 and the outer tube 321, and the elastic member 325 prompts the second gear 323 to engage with the two second racks 324 at the same time; a wedge block 326 sliding in the horizontal direction is provided on the outer tube 321, and when the wedge block 326 moves, it can push the second gear 323 to move in the vertical direction, thereby switching the meshing state of the second gear 323 and the two second racks 324.

[0046] In this embodiment, a track 120 perpendicular to the transmission rod 431 is provided on the base 100, and the mounting seat 200 is slidably installed on the track 120, which is used to adjust the distance between the two simulation motors 310 and the transmission rod 431 in a direction perpendicular to the transmission rod 431, and when the mounting seat 200 moves, the second gear 323 of the adjustment rod 320 engages with one of the second racks 324, and the length of the adjustment rod 320 increases with the movement of the mounting seat 200.

[0047] In this embodiment, a rotating motor 210 and a double-headed screw 220 are provided on the mounting base 200. The double-headed screw 220 is parallel to the transmission rod 431 and is rotatably mounted on the mounting base 200. The double-headed screw 220 is composed of two coaxial screws with opposite rotation directions. A support base 230 is sleeved on each screw. The support base 230 is slidably mounted on the mounting base 200 along the axial direction of the double-headed screw 220 and cooperates with the screw spirally. Each simulation motor 310 is installed on a support base 230; the rotating motor 210 is used to drive the double-headed screw 220 to rotate, and then drive the two simulation motors 310 to approach or move away from each other through the two support bases 230.

[0048] In this embodiment, a sleeve 433 is provided on the outer sleeve of the transmission rod 431, the sleeve 433 is coaxial with the transmission rod 431 and fixed to the base 100, the transmission rod 431 can move axially relative to the sleeve 433 and is restricted by the sleeve 433 from moving or rotating in other directions; the steering system 420 passes through the sleeve 433 and is connected to the transmission rod 431 for transmission.

[0049] Before using the steering simulation device for bench test of the present invention, the reset blocks 520 of the two adjustment units 500 are first moved to match with the corresponding narrow grooves, that is, the two adjustment units 500 are both in the debugging state, the two hinged rods 432 are coaxial with the transmission rod 431 and are restricted from rotating; and the second gear 323 of the adjustment rod 320 is pushed by the moving wedge block 326 to move to mesh with one of the second racks 324, and the adjustment rod 320 is in a state of adjustable length. After adjusting the position of the mounting seat 200 on the track 120, the mounting seat 200 is fixed to the base 100 by bolts or other structures; then the rotating motor 210 is started to drive the double-headed screw 220 to rotate, and the position of the two simulation motors 310 is adjusted to the required distance between the front wheels, so as to determine the distance between the two simulation motors 310, the quadrilateral shape formed by the two adjustment rods 320 and the steering crossbar 430.

[0050] After the adjustment is completed, the wedge block 326 is removed, so that the second gear 323 of the adjustment rod 320 moves to mesh with the two second racks 324 under the action of the elastic member 325, limiting the relative sliding of the outer tube 321 and the inner tube 322 of the adjustment rod 320, thereby locking the length of the adjustment rod 320. By rotating the first gear 610 or moving one of the first racks 630, the reset blocks 520 of the two adjustment units 500 are disengaged from the corresponding narrow grooves, that is, the two adjustment units 500 are switched to the simulation state, and the two articulated rods 432 can rotate relative to the transmission rod 431.

[0051] In actual simulation, the steering wheel 410 can be rotated so that the steering wheel 410 drives the steering transmission rod 431 to move axially through the steering system 420, and the transmission rod 431 drives the two adjustment rods 320 to rotate through the hinge rod 432. The rotation angles of the two wheels are derived according to the rotation angles of the two adjustment rods 320, and then the rotation data of the wheels when the steering wheel 410 rotates are obtained. Alternatively, the two simulation motors 310 are started to rotate at the same or different angles, and the two simulation motors 310 drive the transmission rod 431 to move through the adjustment rod 320 and the hinge rod 432 respectively, and then the transmission rod 431 drives the steering wheel 410 to rotate through the steering system 420, and then the rotation data of the steering wheel 410 when the wheels rotate are obtained.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steering simulation device for bench testing, characterized in that: It includes a base, a mounting seat, a wheel simulation mechanism, a steering mechanism and an adjustment unit; The mounting base is mounted on the base; There are two wheel simulation mechanisms, which are symmetrically arranged in the horizontal direction, and include simulation motors and adjustment rods; the two simulation motors are slidably mounted on the mounting seat and synchronously move closer to or farther from each other; the adjustment rod is hinged with the simulation motor around a vertical axis and can rotate under the drive of the simulation motor and rotate relative to the simulation motor when the simulation motor is powered off; the length of the adjustment rod is adjustable; The steering mechanism includes a steering wheel, a steering system and a steering crossbar. The steering crossbar is horizontally mounted on the base. The steering crossbar includes a transmission rod and two articulated rods respectively articulated with balls at both ends of the transmission rod. The transmission rod is parallel to the distribution direction of the two simulated motors and is restricted by the base to move only along its axial direction. The other end of each articulated rod is respectively articulated with an adjustment rod around a vertical axis. The steering wheel is driven by the steering system and the transmission rod. The mounting seat is adjustable in the horizontal direction perpendicular to the transmission rod; The regulating unit has a debugging state and a simulation state. In the debugging state, the articulated rod is made coaxial with the transmission rod and the free rotation of the articulated rod and the transmission rod is restricted; in the simulation state, the articulated rod is allowed to rotate relative to the transmission rod.

2. A steering simulation device for bench testing according to claim 1, characterized in that: There are two adjustment units, corresponding to two articulated rods respectively, and each adjustment unit includes a positioning sleeve and a reset block; two reset grooves corresponding to the adjustment units are provided on the base, and the reset grooves include a wide groove and a narrow groove distributed in sequence along the axial direction of the transmission rod, the width of the wide groove in a direction perpendicular to the axial direction of the transmission rod is greater than the width of the narrow groove in a direction perpendicular to the axial direction of the transmission rod, and the wide groove and the narrow groove are connected through two inclined transitions; the positioning sleeve is slidably installed on the articulated rod along the axial direction of the articulated rod, and the reset block is vertically arranged and fixedly connected to the positioning sleeve; when the adjustment unit is in the debugging state, the reset block cooperates with the narrow groove, and the articulated rod is kept coaxial with the transmission rod through the positioning sleeve, and the free rotation of the articulated rod and the transmission rod is restricted; when the adjustment unit is in the simulation state, the reset block cooperates with the wide groove, allowing the articulated rod to rotate relative to the transmission rod.

3. A steering simulation device for bench testing according to claim 2, characterized in that: A transmission unit is arranged between the two adjustment units, and the transmission unit enables the reset blocks of the two adjustment units to be synchronously matched with or disengaged from the corresponding narrow grooves.

4. A steering simulation device for bench testing according to claim 3, characterized in that: The positioning sleeve and the reset block are connected by a connecting rod perpendicular to the hinge rod; the transmission unit includes a first gear, two sliding blocks and two first racks, the two first racks are parallel to the transmission rod and are slidably installed on the base along their own axial directions; each sliding block is hinged to a first rack around a vertical axis and is slidably installed on the connecting rod along a horizontal direction perpendicular to the hinge rod; the first gear is rotatably installed on the base, and is located between the two first racks and meshes with both first racks.

5. A steering simulation device for bench testing according to claim 4, characterized in that: A torsion spring is arranged between the first rack and the sliding block, and the torsion spring forces the connecting rod where the sliding block is located to be perpendicular to the first rack.

6. A steering simulation device for bench testing according to claim 1, characterized in that: The adjusting rod comprises an outer tube, an inner tube and a second gear. Both the outer tube and the inner tube are square tubes and are sleeved. The outer tube is hinged with the simulation motor around a vertical axis. Two second racks are arranged opposite to each other and parallel to the sleeved direction of the outer tube and the inner tube. The two second racks partially overlap in the vertical direction. The second gear is rotatably installed on the outer tube around the vertical axis and can move up and down relative to the outer tube. When the second gear is engaged with one of the second racks, the rotation of the second gear drives the inner tube to move relative to the outer tube, so that the adjusting rod is extended or shortened. When the second gear is engaged with the two second racks at the same time, the movement of the inner tube relative to the outer tube is restricted, thereby locking the length of the adjusting rod.

7. A steering simulation device for bench testing according to claim 6, characterized in that: A second elastic member is arranged between the second gear and the outer tube, and the second elastic member causes the second gear to move with the two second racks at the same time; a wedge block sliding in the horizontal direction is arranged on the outer tube, and when the wedge block moves, it can push the second gear to move in the vertical direction.

8. The steering simulation device for bench testing according to claim 1, characterized in that: A track perpendicular to the transmission rod is arranged on the base, and the mounting seat is slidably mounted on the track.

9. A steering simulation device for bench testing according to claim 1, characterized in that: A rotating motor and a double-headed screw are provided on the mounting seat. The double-headed screw is parallel to the transmission rod and is rotatably mounted on the mounting seat. The double-headed screw consists of two coaxial screw sections with opposite rotation directions. A support seat is sleeved on each screw section. The support seat is slidably mounted on the mounting seat along the axial direction of the double-headed screw and cooperates with the screw spirally. Each simulation motor is installed on a support seat; the rotating motor is used to drive the double-headed screw to rotate.

10. The steering simulation device for bench test according to claim 1, characterized in that: A sleeve is disposed outside the transmission rod, which is coaxial with the transmission rod and fixed to the base. The transmission rod can move axially relative to the sleeve and is restricted by the sleeve to move or rotate in other directions; the steering system passes through the sleeve and is connected to the transmission rod for transmission.

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