Automobile steering and driving simulation loading device

Abstract

The utility model discloses an automobile steering and driving simulation loading device, which belongs to the technical field of whole automobile simulation test and comprises a steering loading system, a vertical lifting loading system and a power loading system. The steering loading system transmits loading torque to a tested vehicle through a steering loading motor. The vertical lifting loading system is used for controlling the steering loading system and the power loading system to integrally move up and down; and the power loading system is adaptively connected with the test equipment, loads the simulated road surface load during driving to the tested vehicle, and tests the power performance of the whole vehicle at the same time. According to the utility model, the problem that the existing vehicle-level power test bench can only perform testing under the condition that the vehicle does not turn is effectively solved, and all-directional real driving scene simulation of turning, jolting and power load is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of complete vehicle simulation testing, in particular to a vehicle steering and driving simulation loading device. Background Art

[0002] The steering system of a car is an important device of the car, which has a significant impact on the driving safety, handling stability and operating comfort of the vehicle. In the process of automobile research and development, the loading test of the steering device of the car is one of the important components of the whole vehicle in-loop test. By simulating the steering situation under real road conditions, the performance of the steering system under different loads and resistances is evaluated, so as to ensure that the vehicle has good maneuverability and safety during driving.

[0003] In vehicle testing, the vehicle steering system needs to be loaded at the same time as power loading to ensure the authenticity and accuracy of the test. There are two ways to load the steering system while the vehicle power test bench is powered: coil spring simulation loading and dynamometer trolley loading. The coil spring loading device simulates the steering resistance when the car is turning and the return force of the ground to the steering wheel when the vehicle is moving; but the elastic coefficient of the spring in this scheme is a constant, and the change law of the loading resistance cannot be controlled artificially, so it is impossible to accurately simulate the road torque loading of the car under different working conditions; the dynamometer trolley loading method is to add a steering wheel to the dynamometer base, and the dynamometer is powered. When the wheel turns, the dynamometer will turn with it. This scheme cannot simulate the loading of the steering wheel by the road when turning. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides a vehicle steering and driving simulation loading device, which is intended to solve the problem that the existing vehicle test bench cannot simulate the steering resistance of the vehicle steering wheel during the dynamic simulation test and the vibration simulation test. To achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A vehicle steering and driving simulation loading device comprises a steering loading system, a vertical lifting loading system and a power loading system; the steering loading system is used to apply a load to the vehicle steering wheel; the vertical lifting loading system is used to apply a vertical load to the wheel to make the wheel move up and down; the power loading system is used to provide a load to the driving wheel.

[0006] Furthermore, the steering loading system includes: a steering loading motor, an upper support, a slewing bearing gear, a steering torque transmission seat, a steering torque transmission rod, a ball-type universal wheel, a connecting seat, a support frame and an upper end fixing device; the steering loading motor is fixed to the upper support by fasteners, and the pinion of the motor output shaft cooperates with the slewing bearing gear to transmit the loading torque of the motor to the slewing support gear; the inner side of the slewing support gear is welded to the outer ring of the equal-section bearing, and the inner ring of the equal-section bearing is welded to the upper support, so that the slewing support gear has a rotational freedom relative to the upper support, and the torque angle sensor inside the slewing support gear can accurately measure the rotation angle of the slewing support gear; the steering torque transmission seat is connected to the slewing support gear by fasteners, and has the same rotational freedom as the slewing support gear, The torque of the gear is transmitted to the steering torque transmission seat; there is a rod end joint bearing at the upper end of the steering torque transmission seat, and the steering torque transmission rod passes through the rod end joint bearing to transmit the torque of the steering torque transmission seat to the steering torque transmission rod; the connecting seat is connected to the steering torque transmission rod by a fastener, so that the connecting seat and the support frame can rotate together with the steering torque transmission rod; the upper end of the ball-type universal wheel is connected and fixed to the support frame through the connecting seat, and six universal ball bearings are installed at the lower end, which have rotational freedom and are placed above the upper half of the support to support the support frame; when the steering wheel rotates, the rotational motion will be transmitted to the ball-type universal wheel through the connecting seat, and the ball-type universal wheel rotates together; the upper end of the support frame is connected to the shock absorber rod of the vehicle under test through the upper end fixing device, so that the torque of the support frame is transmitted to the steering wheel of the vehicle under test.

[0007] Furthermore, the vertical lifting and loading system includes: a lower half support, a vertical lifting loader and a vertical guide rail; the lower end of the vertical guide rail is fixed to the lower half support, and the upper end passes through the four through holes of the upper half support to provide guidance for the up and down movement of the upper half support, thereby ensuring that the upper half support moves in the vertical direction; the vertical lifting loader is installed on the lower half support, and when receiving the vertical movement information of the steering wheel from the outside, the hydraulic cylinder pressure of the vertical lifting loader changes, thereby pushing the upper base to move up and down.

[0008] Furthermore, the power loading system includes: a power loading flange, a universal joint half shaft and a brake disc connecting flange; one end of the power loading flange is connected to the test equipment through a fastener, and the other end is connected to the universal joint half shaft, so that the load of the test equipment can be transferred to the universal joint half shaft; the universal joint half shaft is a ball cage type universal joint, and the other end is connected to the brake disc of the test vehicle through the brake disc connecting flange.

[0009] On the basis of the above technical solution, compared with the prior art, the advantages of the utility model are: it realizes the full range of real driving scene simulation of steering + bump + power load, reduces the dependence on actual roads and equipment, and more conveniently evaluates the performance of vehicles under different road conditions, saving costs and time. In the field of vehicle testing, vehicles of any driving form and steering form can be tested, two or four driving wheels can be loaded at the same time, and the test of steering conditions is more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the automobile steering and driving simulation loading device of the utility model;

[0011] Figure 2 It is a cross-sectional schematic diagram of the automobile steering and driving simulation loading device of the utility model;

[0012] Figure 3 This is a schematic diagram of the assembly of the second embodiment of the vehicle steering and driving simulation loading device of the utility model;

[0013] The numbers in the figure are: 1. Vertical lifting loader; 2. Lower half support; 3. Vertical guide rail; 4. Upper half support; 5. Slewing bearing gear; 6. Steering torque transmission rod; 7. Steering loading motor; 8. Steering torque transmission seat; 9. Ball-type universal wheel; 10. Support frame; 11. Universal transmission half shaft; 12. Power loading flange; 13. Upper end fixing device; 14. Brake disc connecting flange; 15. Brake disc of the vehicle under test; 16. Connecting seat. DETAILED DESCRIPTION

[0014] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0015] Embodiment 1:

[0016] See attached Figure 1 , Attachment Figure 2A vehicle steering and driving simulation loading device comprises a steering loading system, a vertical lifting loading system and a power loading system; the steering loading system is used to apply a steering load to the entire device and transmit it to the steering system of the vehicle under test; the vertical lifting loading system is used to control the up and down movement of the steering loading system and the power loading system; the power loading system provides driving loading for the vehicle under test. It can be seen from the above structure that one end of the universal transmission half shaft 11 in the power loading system is connected to the dynamometer through the power loading flange 12, and the other end is connected to the brake disc of the vehicle under test through the brake disc connecting flange 14 to provide the driving wheel load; when the steering loading motor 7 in the steering loading system provides loading, the slewing support gear 5 rotates, driving the steering torque transmission seat 8 to rotate, and further driving the steering torque transmission rod 6 to rotate, and the steering torque transmission rod 6 transmits the torque to the connecting seat 16 and further to the support frame 10, and the support frame 10 transmits the torque to the lower end of the shock absorber rod of the vehicle under test through the upper end fixing device 13, thereby simulating the road surface loading received by the vehicle under test when turning; the rotation angle of the slewing support gear 5 can also be read through the torque angle sensor inside the slewing support gear 5. During the driving process of the vehicle, due to the unevenness of the road surface, the wheels will produce vertical movement. The vertical lifting loading system includes a vertical lifting loader 1, a lower half support 2 and a vertical guide rail 3; the vertical lifting loading system provides a vertical lifting loading simulation for the vehicle under test during driving, and the lower half support 2 is fixed on the experimental platform to provide stable support for the entire torque loading system; the upper half support 4 has four through holes, and the lower end of the vertical guide rail 3 is fixed to the lower half support 2 by fasteners, and the upper end passes through the through holes of the upper half support, so that the upper half support 4 can move up and down along the vertical guide rail 3; the vertical lifting loader 1 provides power for the vertical lifting loading system; when the vertical lifting loader 1 is working, the pressure of the hydraulic cylinder changes, pushing the upper half support 4 up and down, and further driving the steering loading system and the power loading system to move up and down. A linear displacement sensor can be installed on the vertical guide rail to read the distance of the device moving up and down and detect the accuracy of the up and down movement simulation.

[0017] Embodiment 2:

[0018] See attached Figure 3 The intelligent driving vehicle 19 under test is a four-wheel drive vehicle with a four-wheel steering function. The front and rear wheels are connected to a dynamometer 18 with a torque sensor through a car steering and driving simulation loading device 17; the intelligent driving vehicle 19 under test autonomously controls the wheel speed and steering angle according to the virtual road environment; the car steering and driving simulation loading device 17 simulates the ground reaction force when the vehicle bumps and turns, and the return torque when returning to straight driving after turning; at the same time, in this process, the torque angle sensor can effectively detect the performance of the vehicle under test and the reliability of the intelligent driving system.

[0019] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A vehicle steering and driving simulation loading device, characterized in that: The invention comprises a steering loading system, a vertical lifting loading system and a power loading system; the steering loading system transmits the loading torque to the vehicle under test through a steering loading motor (7); the vertical lifting loading system is used to control the steering loading system and the power loading system to move up and down as a whole; the power loading system is adaptively connected to the test equipment to load the simulated road load during driving onto the vehicle under test; the steering loading system comprises a steering loading motor (7), an upper half support (4), a slewing bearing gear (5), a steering torque transmission seat (8), a steering torque transmission rod (6), a ball-type universal wheel (9), a connecting seat (16), a support frame (10) and an upper end fixing device (13); the vertical lifting loading system comprises a vertical lifting loader (1), a lower half support (2) and a vertical guide rail (3); and the power loading system comprises a power loading flange (12), a universal transmission half shaft (11) and a brake disc connecting flange (14).

2. The vehicle steering and driving simulation loading device according to claim 1, characterized in that: The steering loading motor (7) is fixed to the upper half support (4) by means of fasteners; the pinion of the output shaft of the steering loading motor (7) is meshed with the slewing bearing gear (5); the steering torque transmission seat (8) is fixed to the slewing bearing gear (5) by means of fasteners; one end of the steering torque transmission rod (6) passes through the rod end joint bearing on the steering torque transmission seat (8), and the other end is connected to the connecting seat (16) by means of fasteners; a ball-type universal wheel (9) is provided at the lower end of the connecting seat (16); the upper end of the ball-type universal wheel (9) is connected and fixed to the support frame (10) by means of the connecting seat (16), and six universal ball bearings are installed at the lower end, which have rotational freedom and are placed above the upper half support (4) to support the support frame (10); the support frame (10) is connected to the shock absorber rod of the vehicle to be tested by means of an upper end fixing device (13).

3. The vehicle steering and driving simulation loading device according to claim 2 is characterized in that: The slewing bearing gear (5) contains a torque angle sensor and a uniform cross-section bearing, and the uniform cross-section bearing is fixed on the upper half support (4).

4. The vehicle steering and driving simulation loading device according to claim 1, characterized in that: The vertical lifting loader (1) is fixed on the lower half support (2), and pushes the upper half base to move up and down through the change of the pressure of the hydraulic cylinder; the lower end of the vertical guide rail (3) is fixed to the lower half support (2) by a fastener, and the upper end passes through the through hole of the upper half support (4), so that the upper half support (4) can move up and down along the vertical guide rail (3).

5. The vehicle steering and driving simulation loading device according to claim 1, characterized in that: One end of the universal transmission half shaft (11) is connected to a power loading flange (12), and the other end is connected to a brake disc connecting flange (14); the brake disc connecting flange (14) is fixed to the brake disc of the vehicle under test by means of a fastener.

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