Automobile chassis steering and braking HIL hardware-in-the-loop test bench

Abstract

The invention relates to the technical field of automobile testing, and discloses an automobile chassis steering and braking HIL hardware-in-the-loop test board which comprises an operation part used for installing a steering system and a braking part used for installing a braking system, the operation part is electrically connected with the braking part, and the operation part comprises a rack. A support used for mounting a steering wheel assembly is fixed to the top end of the rack, a sliding seat is slidably connected to the bottom end of the rack, steering resistance parts are symmetrically arranged on the two sides of the sliding seat, and a mounting part used for mounting a steering assembly is formed between the steering resistance parts. The brake part is used for installing a real vehicle brake pedal assembly, brake calipers, a wheel speed gear ring and a real vehicle posture module and carrying out detection and brake simulation on the real vehicle brake pedal assembly, the brake calipers, the wheel speed gear ring and the real vehicle posture module, and the steering resistance part is used for adjusting the rotation angle according to road conditions in a simulation map and carrying out an endurance test on steering of an automobile steering device; the brake part can be combined with the pedal assembly to detect the brake system of the vehicle body, and the effects of comprehensive detection and detection efficiency improvement are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive testing, and particularly to an automotive chassis steering and braking HIL hardware-in-the-loop test bench. Background Art

[0002] The automotive chassis system is an important part of modern automobiles, and its performance directly affects the safety, handling, and comfort of the vehicle. As the core parts of the chassis system, the steering system and the braking system are responsible for vehicle direction control and speed regulation respectively. The steering system usually includes components such as a steering wheel assembly, a steering column, a steering gear, and a steering knuckle arm, while the braking system consists of a pedal assembly, a vacuum booster or an electric booster, a master brake cylinder, a brake fluid pipeline, a brake caliper, brake pads, and a brake disc. The braking system also consists of a brake pedal assembly, a brake caliper, a wheel speed gear ring, and a real vehicle attitude module. The brake pedal is the main interface for the driver to control the vehicle braking. By stepping on the brake pedal, the driver can transmit a signal to the braking system to initiate the braking process; the brake caliper is a key actuating component in the braking system, and its main function is to clamp the brake disc to generate frictional force to decelerate or stop the vehicle; the wheel speed gear ring is an important part of the automotive ABS system and is used to monitor the rotational speed of the wheel; the real vehicle attitude module is mainly used to monitor the dynamic state of the vehicle, including information such as vehicle speed, acceleration, and steering angle.

[0003] With the development of intelligent driving technology, the test requirements for the steering system and the braking system have become increasingly complex. Traditional chassis HIL hardware-in-the-loop test equipment can usually only perform tests for a single function, such as only supporting steering HIL tests or braking HIL tests, and cannot conduct comprehensive joint tests on the steering and braking systems simultaneously. This single-function test method limits the comprehensiveness and efficiency of the test and cannot meet the requirements for verifying the comprehensive performance of the chassis system of modern automobiles. The following improvements are proposed for the above problems. Summary of the Invention

[0004] The present invention aims to provide an automotive chassis steering and braking HIL hardware-in-the-loop test bench to solve the problem of the single function of traditional HIL hardware-in-the-loop tests.

[0005] To achieve the above object, the present invention adopts the following technical solution: An automotive chassis steering and braking HIL hardware-in-the-loop test bench, which includes an operation part for installing a steering system and a braking part for installing a braking system. The operation part is electrically connected to the braking part. The operation part includes a frame. At the top of the frame, there is a bracket for installing a steering wheel assembly, and at the bottom, there is a sliding seat connected in a sliding manner. On both sides of the sliding seat, there are symmetrically arranged steering resistance parts. Between the steering resistance parts, there is an installation part for installing a steering assembly. At the bottom of the frame, there is also a pedal assembly. The braking part is used for installing a real vehicle brake pedal assembly, a brake caliper, a wheel speed gear ring, and a real vehicle attitude module and detecting and simulating braking on them.

[0006] The beneficial effect of this solution is as follows: The steering assembly is installed on the installation part and connected to the steering resistance part. The steering resistance part adjusts the rotation angle according to the road conditions in the simulation map, so as to give a corresponding force to the steering assembly according to different situations. At the same time, a steering wheel assembly is set on the frame, and the operator controls the rotation of the vehicle's steering gear through the steering wheel assembly, which can conduct the steering durability test of the vehicle's steering gear. There is also a pedal assembly set on the frame, and the braking part can combine with the pedal assembly to detect the braking system of the vehicle body. Compared with the prior art, it is no longer a single test, but a combined test of multiple performances, which is more energy-saving and saves the detection procedure, and can comprehensively detect and improve the detection efficiency.

[0007] Further, the steering resistance part includes a swing arm rotatably arranged on the sliding seat, a pull rod installed on the sliding seat, a connecting rod is arranged between the pull rod and the swing arm, a force sensor is connected between the pull rod and the connecting rod, and the sliding seat is equipped with a first driving part for driving the swing arm to rotate.

[0008] The beneficial effect of this solution is as follows: By setting the force sensor, when the steering resistance part acts on the steering gear, the force sensor can detect the magnitude of the force between the two, so as to facilitate recording and detecting the steering durability of the steering gear.

[0009] Further, a display screen and a steering driving mechanism are movably installed at the top of the bracket. The steering driving mechanism includes a base installed on the bracket, a loading arm hinged to the base, and a steering mechanism hinged to the loading arm. The bottom end of the steering mechanism is used to connect to the steering gear.

[0010] The beneficial effect of this solution is as follows: By setting the steering driving mechanism, in the prior art, the operator controls the rotation of the steering gear through the steering wheel assembly. However, during the long-term detection process, the operator is prone to fatigue, while the steering driving mechanism can drive the rotation of the steering gear according to the actual situation in the virtual map, which can achieve the effect of saving manpower.

[0011] Further, the steering mechanism includes a driving box. At the top of the driving box, there is a second driving part. At the bottom of the driving box, there is an input shaft. The second driving part is used to drive the input shaft to rotate, and the input shaft is used to connect to the steering gear.

[0012] Further, a slider and a driving block are provided at the bottom end of the sliding seat, a chute for the slider to be embedded is opened at the bottom end of the frame, a lead screw is rotatably arranged on the frame, and the lead screw is in threaded connection with the driving block.

[0013] The beneficial effect of this solution is that the lead screw is rotatably connected to the bottom end of the frame. Rotating the lead screw can drive the driving block to horizontally slide the sliding seat in the chute in the direction of the lead screw, so that the sliding seat can be adjusted according to the driving space inside the vehicle to be inspected, and the real scene inside the vehicle body can be restored more realistically.

[0014] Further, the installation part includes an adjusting plate arranged on the sliding seat and a number of toolings detachably connected to the adjusting plate, and the number of toolings are used to connect the steering assembly.

[0015] The beneficial effect of this solution is that for different vehicle bodies to be inspected, the sizes of the steering assemblies adopted are different, and the toolings can be disassembled and installed on the adjusting plate by bolts according to the actual required sizes, so as to install the steering assembly, and the purpose of selective installation can be achieved.

[0016] Further, the operation part further includes a seat cabin.

[0017] Further, the braking part includes a braking box, in which an electric linear cylinder, a brake caliper simulation mechanism and a wheel speed simulation mechanism are installed. The electric linear cylinder is electrically connected to the pedal assembly for receiving braking signals. The electric linear cylinder is used to drive the brake caliper simulation mechanism to simulate braking, and the wheel speed simulation mechanism is used to install the wheel speed gear ring.

[0018] The beneficial effect of this solution is that the braking part is electrically connected to the pedal assembly through the electric linear cylinder, and drives the telescopic rod to expand and contract according to the force on the pedal assembly, promoting the movement of the brake caliper simulation mechanism, so as to control the wheel speed simulation mechanism to detect the vehicle speed and brake it, and the effect of detecting the vehicle braking system can be achieved.

[0019] Further, both the first driving member and the second driving member are set as motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the structure in the direction of the sliding frame behind the operation part of an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the structure in the direction of the bracket in front of the operation part of an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the overall structure of the steering drive mechanism of an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the overall structure of the seat cabin according to an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the internal structure of the brake box according to an embodiment of the present invention. Specific embodiments

[0026] The following is a more detailed description through specific embodiments:

[0027] The reference numerals in the accompanying drawings of the specification include: operation part 1, frame 11, pedal assembly 111, chute 112, first lead screw 113, bracket 12, first guide rail 121, display screen 1211, second guide rail 122, steering wheel assembly 1221, sliding seat 2, swing arm 21, pull rod 22, connecting rod 23, force sensor 24, first driving part 25, driving block 26, adjusting plate 27, tooling 271, steering drive mechanism 3, base 31, pin shaft 311, lead screw mechanism 312, lead screw seat 3121, second lead screw 3122, articulated rod 313, loading arm 32, nut seat 321, worm and worm gear box 322, turning handle 3221, steering mechanism 33, drive box 331, second driving part 332, input shaft 333, braking part 4, brake box 41, electric linear cylinder 42, brake caliper simulation mechanism 43, wheel speed simulation mechanism 44, automotive brake pedal assembly 45, three-axis freedom platform 46, seat cabin 5, driver's console 51, adjusting seat 511, guardrail 512, support rod 513, seat body 52, steering gear 6.

[0028] Embodiment

[0029] The embodiment is basically as shown in the attached Figure 1-6 As shown, a hardware-in-the-loop test bench for automotive chassis steering and braking HIL, as Figures 1-3 shown, includes an operation part 1. The operation part 1 includes a frame 11. A bracket 12 is provided at the top of the frame 11. A mounting seat is fixed to the bottom end of the bracket 12 by bolts. The frame 11 and the mounting seat are fixedly connected by bolts, so as to fixedly install the bracket 12 on the frame 11. The bracket 12 is sequentially provided with a first guide rail 121 and a second guide rail 122 from top to bottom. A display screen 1211 is installed on the first guide rail 121, and a steering drive mechanism 3 is installed on the second guide rail 122. Guide blocks are fixedly installed on both the display screen 1211 and the steering drive mechanism 3. The guide blocks are respectively slidably connected to the first guide rail 121 and the second guide rail 122. The guide block located on the second guide rail 122 is used to install the steering wheel assembly 1221 of the vehicle under test. By providing the ground guide rail and the second guide rail 122, sliding adjustment can be made according to the left and right steering wheels of the vehicle; a pedal assembly 111 is installed at the bottom end of the frame 11 below the bracket 12, and a sliding seat 2 is slidably connected to the rear end of the frame 11 at the bottom end of the bracket 12.

[0030] A chute 112 is provided at the bottom end of the frame 11. The chute 112 is T-shaped. The frame 11 is also rotatably installed with a first lead screw 113. A lead screw seat 3121 for rotatably connecting the first lead screw 113 is fixed on the frame 11. A rotating handle is fixedly arranged at the end of the first lead screw 113. A T-shaped slider is fixed at the bottom end of the sliding seat 2. The T-shaped slider is embedded in the T-shaped groove. A driving block 26 for threadedly connecting with the first lead screw 113 is also fixed at the bottom end of the sliding seat 2. Rotating the first lead screw 113 can drive the sliding seat 2 to slide on the frame 11 through the driving block 26.

[0031] As Figures 2-3 shown, swing arms 21 are symmetrically and rotatably connected to both ends of the sliding seat 2. First driving members 25 are symmetrically installed at both ends of the sliding seat 2. The first driving members 25 are configured as motors. The output ends of the first driving members 25 are connected to the swing arms 21. The first driving members 25 are used to drive the swing arms 21 to rotate. An adjusting plate 27 is installed at the middle of the two swing arms 21 on the sliding frame. A pull rod 22 is installed on the adjusting plate 27. A connecting rod 23 is hinged between the pull rod 22 and the swing arm 21. A force sensor 24 is arranged between the connecting rod 23 and the pull rod 22. A number of toolings 271 are detachably installed on the adjusting plate 27. A number of installation holes for installing the toolings 271 are provided on the adjusting plate 27. The toolings 271 and the installation holes are fixedly connected by bolts. By providing the detachably connected toolings 271, the toolings 271 are used to install the steering assembly of the vehicle to be inspected, and the pull rod 22 is used to connect with the steering knuckle arm of the vehicle steering assembly; when detecting vehicles of different models, the position of the tooling 271 is replaced according to the width of the model to achieve the best restored environment for the experiencer. Before the test, the map required for the detection is stored in the system. During the detection process, the first driving members 25 on both sides of the sliding seat 2 rotate according to the road conditions in the map, so as to simulate the forces received by the wheels of the vehicle body in the corresponding map road conditions. The rotation of the first driving members 25 causes the swing arms 21 to apply a squeezing force or a pulling force to the pull rod 22 through the connecting rod 23.

[0032] As Figures 3-4As shown, the steering drive mechanism 3 includes a base 31. The base 31 is fixedly connected to the guide block slidably connected to the second guide rail 122 by bolts. A pin shaft 311 is fixedly installed on the base 31. The base 31 is rotatably connected to a loading arm 32 through the pin shaft 311. A bushing is connected between the loading arm 32 and the pin shaft 311, and the bushing provides a rotational transition for the loading arm 32 and the pin shaft 311. The base 31 is also provided with a lead screw mechanism 312. The loading arm 32 is hinged to the base 31 through the lead screw mechanism 312. The lead screw mechanism 312 includes a lead screw base 3121. A hinge rod 313 is connected between the lead screw base 3121 and the pin shaft 311 of the base 31. Both ends of the hinge rod 313 are rotatably connected to the lead screw base 3121 and the pin shaft 311 respectively. A second lead screw 3122 is rotatably connected to the lead screw base 3121. A handle is fixedly connected to the top end of the second lead screw 3122. A nut seat 321 for connecting the second lead screw 3122 is fixedly provided on the loading arm 32. The second lead screw 3122 is threadedly connected to the nut seat 321. By rotating the second lead screw 3122 with the handle, relative movement is generated between the second lead screw 3122 and the nut seat 321 when the second lead screw 3122 rotates, so as to drive the loading arm 32 to rotate on the base 31. A rotating shaft is provided at the end of the loading arm 32 away from the base 31, and a worm and worm gear box is fixedly installed.

[0033] A rotating handle 3221 for driving its rotation is provided at the top of the worm and worm gear box. The worm in the worm and worm gear box is coaxially arranged with the rotating shaft. The rotating handle 3221 is used to drive the worm to rotate. The rotation of the worm drives the worm shaft and the rotating shaft to rotate. The rotating shaft extends outwards and a drive box 331 is fixedly installed. An input shaft 333 is rotatably connected in the drive box 331. A second driving member 332 is fixedly installed at the top of the drive box 331. The second driving member 332 is set as a motor. The output end of the second driving member 332 is connected to a speed reducer. The output end of the speed reducer is connected to the input shaft 333. The bottom end of the input shaft 333 protrudes from the drive box 331 and is provided with an input end tooling 271 for connecting to the vehicle steering gear 6.

[0034] As Figure 1 、 Figure 4As shown in the figure, the seat cabin 5 includes a console 51 disposed at one side of the bottom end of the frame 11 near the pedal assembly 111, and a seat body 52 slidably mounted on the top end of the console 51. An adjustable footrest is installed at the bottom end of the console 51. The adjustable footrest includes a support base fixedly mounted on the side of the console 51 by bolts. A support rod 513 is slidably connected to the support base. The support rod 513 is connected with an adjusting nut at the bottom end of the support base. The adjusting nut is used to carry the support base. By rotating the adjusting nut, the height position of the adjusting nut on the support rod 513 can be changed, so as to change the height of the support base on the support rod 513, thereby realizing the height adjustment of the console 51. In the actual application process, the height adjustment is carried out according to the height of the actual vehicle. Sliding grooves are provided on both sides of the top end of the console 51. The console 51 is horizontally slidably connected with an adjusting seat 511 through the sliding grooves. The adjusting seat 511 includes a cross beam and supports fixedly connected to both sides of the bottom end of the cross beam. A positioning plate is fixedly welded to the bottom end of the support. A sliding block is fixedly provided at the bottom end of the positioning plate. The sliding block is embedded in the sliding groove. Positioning holes are provided on the positioning plate for fixing it on the console 51. When sliding, the adjusting seat 511 is pushed to horizontally slide on the top end of the console 51 through the sliding groove. After adjusting according to the internal space of the actual vehicle, bolts are used to pass through the positioning holes to fix the positioning plate on the console 51.

[0035] The adjusting seat 511 includes two groups of cross beams and supports. The front and rear two groups of cross beams and supports jointly form the adjusting seat 511. Installation parts for installing the seat body 52 are fixedly installed on the top ends of the two cross beams of the adjusting seat 511. The installation parts can quickly replace the seat body 52 of the actual vehicle. Moreover, the distance between the front and rear two groups of cross beams and supports of the adjusting seat 511 can be adjusted to facilitate adapting to seats of different widths. A guardrail 512 is fixedly installed on the outer side of one end of the console 51 away from the operation part 1. The guardrail 512 is fixedly welded with a guard seat plate for fixedly connecting with the console 51. A plurality of connection holes are provided on the guard seat plate. Bolts can be used to pass through the connection holes to install it on the console 51. In the actual application process, different sizes of seat bodies 52 and different driving spaces make the distance between the seat body 52 and the operation part 1, and the distance between one end of the seat body 52 away from the operation part 1 and the rear end of the console 51 change. Therefore, the position of the guardrail 512 on the console 51 can be adjusted according to the actual situation, so that the distance between the guardrail 512 and the seat body 52 meets the standard, which is convenient for the driving test personnel to hold when getting on and off the seat body 52.

[0036] As Figure 1 、 Figure 6As shown, it also includes a braking part 4, which includes a brake box 41. An electric linear cylinder 42, a brake caliper simulation mechanism 43 and a wheel speed simulation mechanism 44 are installed in the brake box 41. The electric linear cylinder 42 is electrically connected to the pedal assembly 111. When the driver steps on the pedal assembly 111, the electric linear cylinder 42 can recognize the signal and control the electric linear cylinder 42 to extend a corresponding distance according to the size of the stepping force. A car brake pedal assembly 45 is connected between the electric linear cylinder 42 and the brake caliper simulation mechanism 43. The extension of the electric linear cylinder 42 will push the car brake pedal assembly 45 forward to simulate the action of stepping on the brake on an actual car. At this time, the brake caliper simulation mechanism 43 will tighten the caliper, and the wheel speed on the wheel speed simulation mechanism 44 will follow and decrease. A three-axis degree of freedom platform 46 is also installed in the brake box 41. The three-axis degree of freedom platform 46 is used to simulate the angle deviation when the actual car is driving. Therefore, the car ESC module installed thereon will follow the angle deviation and transmit the signal to the host computer in real time to assist in the generation of the entire brake-in-the-loop.

[0037] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A vehicle chassis steering and braking HIL hardware-in-the-loop test bench, characterized by: It includes an operating part for installing a steering system and a braking part for installing a braking system. The operating part is electrically connected to the braking part. The operating part includes a frame. A bracket for installing a steering wheel assembly is fixed on the top of the frame, and a sliding seat is slidably connected to the bottom of the frame. Steering resistance parts are symmetrically arranged on both sides of the sliding seat. A mounting part for installing a steering assembly is formed between the steering resistance parts. A pedal assembly is also installed at the bottom of the frame. The braking part is used to install a real vehicle brake pedal assembly, a brake caliper, a wheel speed gear ring, and a real vehicle posture module, and to detect and simulate the braking.

2. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to claim 1 is characterized by: The steering resistance unit includes a swing arm rotatably arranged on a sliding seat, a pull rod installed on the sliding seat, a connecting rod is arranged between the pull rod and the swing arm, a force sensor is connected between the pull rod and the connecting rod, and a first driving member for driving the swing arm to rotate is installed on the sliding seat.

3. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to claim 1 is characterized by: A display screen and a steering drive mechanism are movably installed on the top of the bracket. The steering drive mechanism includes a base installed on the bracket, a loading arm hinged to the base and a steering mechanism hinged to the loading arm. The bottom end of the steering mechanism is used to connect with the steering gear.

4. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to claim 3 is characterized by: The steering mechanism comprises a driving box, a second driving member is installed at the top of the driving box, an input shaft is arranged at the bottom of the driving box, the second driving member is used to drive the input shaft to rotate, and the input shaft is used to connect with the steering gear.

5. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to claim 1 is characterized by: The bottom end of the sliding seat is provided with a sliding block and a driving block, the bottom end of the frame is provided with a sliding groove for the sliding block to be embedded, and the frame is rotatably provided with a screw rod, which is threadedly connected with the driving block.

6. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to claim 1 is characterized by: The mounting part comprises an adjusting plate arranged on the sliding seat and a plurality of toolings detachably connected to the adjusting plate, wherein the plurality of toolings are used for connecting the steering assembly.

7. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to claim 6 is characterized by: The operating part also includes a seat cabin.

8. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to claim 1 is characterized by: The braking part includes a brake box, in which an electric linear cylinder, a brake caliper simulation mechanism, and a wheel speed simulation mechanism are installed. The electric linear cylinder is electrically connected to the pedal assembly for receiving a brake signal. The electric linear cylinder is used to drive the brake caliper simulation mechanism to simulate braking, and the wheel speed simulation mechanism is used to install the wheel speed gear ring.

9. The automotive chassis steering and braking HIL hardware-in-the-loop test bench according to any one of claims 2 and 4, characterized in that: The first driving member and the second driving member are both configured as motors.

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