A turn-over test bench integrated with multi-platform cab and a control method thereof

Abstract

The application discloses a kind of integrated multi-platform cab's turnover test bench and control method, belong to test bench field, turnover test bench includes test bench welded base, environmental perception sensor, test monitoring sensor, drive equipment, control electric box and remote control equipment, test bench welded base is hingedly arranged with cab, and test bench welded base is fixed with multiple cab installation positions;Environmental perception sensor is fixed on the test bench welded base at the front end position of cab;Test monitoring sensor is fixed on the wheel arch side of cab, for monitoring cab attitude deviation test;Drive equipment is installed on test bench welded base and connected with cab;Control electric box is electrically connected environmental perception sensor, test monitoring sensor and drive equipment;Remote control equipment is signal connected control electric box;When using, test bench is more comprehensive for turnover test condition judgment through "sensor signal+electrical switch signal" double check mechanism.

Description

Technical Field

[0001] This application relates to the field of test bench technology, specifically to a rollover test bench with an integrated multi-platform cab and a control method. Background Technology

[0002] Existing cab rollover test benches suffer from several drawbacks, including high levels of manual intervention in test operations, simple and fixed rollover control logic, and numerous safety vulnerabilities. They often employ a single electronic start-stop control system, lacking multiple protection mechanisms such as environmental safety monitoring, vehicle status linkage verification, and bench self-checking. During rollover operations, safety accidents are easily caused by issues such as personnel accidentally entering the site, obstructions from obstacles, abnormal vehicle gear shifts, and improper opening or closing of doors / front grilles. Meanwhile, existing test benches are mostly customized for a single vehicle model, resulting in low versatility and poor adjustability, making them unsuitable for rollover testing of multiple cab models. To meet the production needs of multiple vehicle models, companies need to purchase multiple sets of dedicated rollover test benches, which leads to high equipment investment costs, large space requirements, and cumbersome tooling switching, thus affecting testing efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a rollover test bench and control method that integrates multiple platform cabs, so as to solve the above-mentioned defects caused by the prior art.

[0004] To achieve the above objectives, this application employs the following technical solution: Firstly, this application discloses a rollover test bench integrating a multi-platform cab, which includes... A bench welding base, on which a cab is hinged, is provided; and the bench welding base is provided with mounting positions for different suspension mechanisms that are compatible with various cab series. An environmental perception sensor is fixed on a welded base on a frame at the front of the cab. The test monitoring sensor is fixed on the side of the wheel arch of the cab and is used to monitor the cab attitude deviation test; A drive unit, which is mounted on the welded base of the bench and connected to the cab, is used to rotate the cab toward the installation direction of the environmental perception sensor; The control box is electrically connected to the environmental sensing sensor, the test monitoring sensor, and the drive equipment. The remote control device is connected to the control box via a signal. The control box is configured to control the start and stop of the drive equipment based on feedback data from environmental perception sensors and test monitoring sensors. The remote control device is configured to remotely control the operation of the control box.

[0005] In a further embodiment of this application, the drive device includes a lifting pump, a lifting cylinder, a reversing valve controller, and a control shaft; The lifting cylinder is hinged to the welded base of the platform and the cab at both ends. The lifting pump oil circuit is connected to the lifting cylinder. The reversing valve controller is fixedly installed and rotatably connected to the reversing handle of the lifting pump through a control shaft.

[0006] The control box is used to input positive and negative voltages to the reversing valve controller, which drives the control shaft to rotate in both directions to achieve upshifting and downshifting.

[0007] In a further embodiment, the lifting pump is equipped with a pressure sensor for detecting pressure changes during the cab's tilting / lowering process, and the platform welding base is connected to the cab by a steel wire rope.

[0008] In a further embodiment of this application, the driver's cab is centrally mounted on the welded base of the platform.

[0009] Secondly, this application discloses a control method for a rollover test bench based on the above-mentioned integrated multi-platform cab, which includes, according to the cab test mode, the remote control device or control box controls the drive device to complete the corresponding test operation steps based on feedback from environmental perception sensors and test monitoring sensors. The cab test modes include: The first mode is used for environmental safety perception and early warning of the flipped test bench; The second mode is used for self-inspection of the flipped test bench fixture; The third mode is for remote control of the flipping test bench; The fourth mode is used for monitoring process data and automatic judgment of the flip test bench.

[0010] A further aspect of this application, wherein the first mode includes: The environmental perception sensor monitors the area in front of the cab in real time, and generates an abnormal detection signal if an obstacle is detected within a preset range. The control box receives the abnormal detection signal from the environmental perception sensor, controls the flip condition circuit in the control box to disconnect, and triggers an audible and visual alarm until the obstacle is moved out.

[0011] A further aspect of this application, the second mode includes: Environmental perception sensors monitor the displacement of the welded base of the test bench during the cab's rollback and fall, and perform corresponding operations accordingly. If the displacement is less than the set threshold, the control box will issue an audible and visual alarm and display the abnormal fault point on the electrical control interface. If the displacement is not less than the set threshold, the control box controls the drive equipment to stop and drives the cab to fall back.

[0012] A further aspect of this application, the third mode includes: If the test environment becomes abnormal; The operator uses the remote control device to issue a stop command to the control box to stop the test until the maintenance is completed. Then, the operator uses the remote control device to issue a start command to the control box to start the test.

[0013] A further embodiment of this application, the fourth mode, includes: The test monitoring sensor monitors the cab attitude data in real time and performs corresponding operation processing. If the deviation of the cab posture data from the set parameters is less than the set threshold, the control box will trigger an alarm and display the abnormal fault point on the electronic control interface. If the deviation of the cab posture data from the set parameters is greater than the set threshold, the control box controls the drive equipment to depressurize and stop.

[0014] A further proposed solution involves the test monitoring sensor monitoring the cab attitude data in real time and performing corresponding operational processing, including: Once the cab tilting and lowering cycle is complete, obtain the cab locking signal; If the locking signal does not meet the preset standard, an audible and visual alarm will be triggered; otherwise, a normal signal will be issued.

[0015] The beneficial effects of this application are as follows: This application incorporates sensors and a control box. During use, the test bench employs a dual verification mechanism of "sensor signals + electrical switch signals" to provide a more comprehensive assessment of the flip test conditions. The flip test bench integrates dual monitoring functions of "data acquisition + risk alerts," improving overall test efficiency while enhancing the efficiency of risk assessment during the test process. Simultaneously, the welded base of the test bench is equipped with multiple cab mounting positions, allowing for the installation of different cab mounts, reducing test consumables, improving the utilization rate of the test site, and facilitating centralized monitoring and maintenance of the test equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the flipping test bench in the embodiments of this application; Figure 2 This is an enlarged view of the installation location of the environmental sensing sensor in an embodiment of this application; Figure 3 This is an enlarged view of the installation location of the test monitoring sensor in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the driving device in the embodiments of this application; Figure 5This is a schematic diagram of the cab tilting to its maximum angle and the steel wire rope safety protection structure in an embodiment of this application; Figure 6 This is an enlarged view of the connection between the wire rope and the welded base of the platform in an embodiment of this application; Figure 7 This is an enlarged view of the connection between the wire rope and the driver's cab in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of the flip test bench matched with the "front fixed and rear floating" suspension in the embodiment of this application.

[0017] in: 1. Control box; 2. Environmental sensing sensor; 3. Reversing valve controller; 4. Lifting pump; 5. Test monitoring sensor; 6. Bolt; 7. Cab; 8. Wire rope; 9. Welded base of the test bench; 10. Locking bracket; 11. Control shaft; 12. Motor; 13. Reversing handle; 14. Lifting ring bracket; 15. Pressure sensor; 18. Mounting position; 19. Single row rear overhang; 20. Extended row rear overhang. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. Example 1

[0019] like Figure 1 and Figure 2 and Figure 8 As shown, this application discloses a rollover test bench integrating a multi-platform cab 7, which includes a bench welding base 9, an environmental perception sensor 2, a test monitoring sensor 5, a drive device, a control box 1, and a remote control device. The cab 7 is hinged to the bench welding base 9, and different suspension mechanism mounting positions 18 for various types of cabs 7 are provided on the bench welding base 9. The environmental perception sensor 2 is fixed on the bench welding base 9 at the front end of the cab 7. The test monitoring sensor 5 is fixed on the wheel arch side of the cab 7 for monitoring the attitude deviation test of the cab 7. The drive device is installed on the bench welding base 9 and connected to the cab 7 for rolling the cab 7 toward the installation direction of the environmental perception sensor 2. The control box 1 is electrically connected to the environmental perception sensor 2, the test monitoring sensor 5, and the drive device. The remote control device is signal-connected to the control box 1. When the cab 7 is installed on the bench welding base 9, the cab 7 is installed in the center of the bench welding base 9.

[0020] The control box 1 is configured to control the start and stop of the drive equipment based on the feedback data from the environmental perception sensor 2 and the test monitoring sensor 5; the remote control device is configured to remotely control the operation of the control box 1.

[0021] This test bench is equipped with multiple sensors. The control box 1 receives signals from the sensors and selects the operating mode based on the signals. During the test, environmental perception signals are added to the cab 7 tilting condition circuit to automatically monitor the surrounding environment and stability parameters of the tilting bench before and during the test, and automatically control the start and stop of the test according to the on / off state of the condition circuit. This effectively improves the safety and controllability of the test. The test bench can be matched with various different platforms and different lengths and suspension types of the same platform cab 7, effectively improving the versatility of the test equipment and the utilization rate of the site.

[0022] As attached Figure 3 , Figure 4 As shown, the drive device in this embodiment includes a lifting pump 4, a lifting cylinder, a reversing valve controller 3, and a control shaft 11. The lifting cylinder is connected at both ends to a hinged platform welded to a base 9 and a cab 7. The lifting pump 4 is connected to the lifting cylinder via an oil circuit. The reversing valve controller 3 is fixedly installed and rotatably connected to the reversing handle 13 of the lifting pump 4 via the control shaft 11. The control box 1 is used to input positive and negative voltages to the reversing valve controller 3. The reversing valve controller 3 drives the control shaft 11 to rotate forward and backward, realizing gear shifting.

[0023] The control equipment for the tilting test bench does not require manual operation of the lifting pump 4 to switch between lifting and lowering the cab 7. When the conditional circuit in the control box 1 is connected, the motor 12 in the reversing valve controller 3 drives the control shaft 11 to rotate clockwise, rotating the reversing handle 13 to the lifting position. When the cab 7 tilts to its maximum angle, the control box 1 transmits reverse voltage to the motor 12 of the reversing valve controller 3 to reverse its operation, driving the reversing handle 13 of the lifting pump 4 to rotate counterclockwise to the lowering position, and the cab 7 falls back, completing one automatic test bench tilting test.

[0024] As attached Figures 5 to 7 As shown, in this embodiment, a pressure sensor 15 is installed on the lifting pump 4 to detect pressure changes during the tilting / falling process of the cab 7. To prevent the pressure sensor 15 from failing to detect significant pressure changes and causing the lifting cylinder piston to fail and fall forward after tilting past the center of gravity, this tilting platform is equipped with a set of mechanical protection measures: one end of a steel wire rope 8 is fixed to the lifting ring bracket 14 of the platform welded base 9, and the other end is fixed to the locking bracket 10 on the cab 7. When the cab 7 tilts past the center of gravity, it can be pulled back to prevent it from tilting forward and falling to the ground, causing property damage or even personal injury. To improve the stability of the tilting platform, two through holes are opened at each of the four corners of the bottom of the four platform welded bases 9, and expansion bolts 6 are used to fix them to the test chamber floor.

[0025] As attached Figure 8 As shown, the cab 7 mounting position 18 on the base of the tilting stand is compatible with the installation and tilting test requirements of three different cab 7 suspensions for three different platforms; and it can also meet the installation requirements of different specifications of cab 7 (single row rear overhang 19, extended row rear overhang 20) on the same platform. This effectively improves assembly and testing efficiency and saves testing materials and floor space.

[0026] The conditional circuit of the rollover test bench includes both sensor signals and electrical signals: it includes the signal from the external environmental sensing sensor 2 connected to the control box 1, as well as the neutral switch, front hood switch, and door switch electrically connected to the control box 1. The rollover condition of the cab 7 must simultaneously meet six conditions: no personnel or obstacles within 2 meters in front of the cab 7, good bench stability, the vehicle in neutral, the front hood open, the doors closed, and all parameters during the test remaining within the normal range. Example 2

[0027] This embodiment discloses a control method for a rollover test bench integrating a multi-platform cab 7, which includes controlling the drive equipment to complete the corresponding test operation steps based on feedback from the environmental perception sensor 2 and the test monitoring sensor 5 according to the test mode of the cab 7.

[0028] In specific use, Environmental safety perception and early warning function for flip test bench.

[0029] First, the infrared environmental sensing sensor 2, fixed to the front of the welding base 9 on the test bench, can detect obstacles within 2 meters in front of the cab 7. Warnings can be divided into two scenarios: before the test and during the test. 1. Assuming that the operator does not notice any person / obstacle within 2 meters in front of the cab 7 before starting the test and operates the button on the control box 1 to start the test, the signal transmitted from the environmental perception sensor 2 to the control box 1 will disconnect the rollover condition circuit and trigger an alarm. After the obstacle in front of the cab 7 is cleared, the control box 1 can be operated again to start the test.

[0030] 2. Assuming that during the test, if a person accidentally enters the restricted area 2 meters in front of the driver's cab 7, the infrared environmental perception sensor 2 will also identify it and send back a signal to disconnect the rollover condition circuit, automatically stopping the rollover test. The test can only be automatically resumed after the person in front has been safely evacuated, which improves the accuracy and efficiency of danger signal identification before and during the rollover test.

[0031] The test bench fixture has a self-inspection function.

[0032] The infrared environmental sensing sensor 2, fixed to the welding base 9 of the test bench, also has a test bench stability detection function, detecting and analyzing the minute displacement of the welding base 9 of the test bench during each flip and fall process. When the deviation value (displacement) reaches a certain amount but is less than the set threshold, the control box 1 will trigger an alarm to remind the test personnel to perform maintenance and inspection, and display the abnormal fault point on the electrical control interface. When the deviation value deviates from the set parameter greater than the set threshold, the control box 1 will immediately control the lifting pump 4 to depressurize and stop, and the cab 7 will automatically control the fall to avoid greater safety hazards.

[0033] Remote control function for flipping test bench.

[0034] This flip-top control device features remote control functionality: test personnel can either start the test on-site by pressing button 1 on the flip control box, or remotely view the on-site situation transmitted back by the laboratory monitoring equipment via mobile phone, and remotely control the start and stop of the test. If on-site personnel or the automatic control equipment on the flip-top fail to perceive any test risk, remote personnel can also directly stop the test, effectively improving test safety.

[0035] Monitoring process data and automatic judgment function of the flip test bench.

[0036] The test monitoring sensor 5 installed on the wheel arch side of the cab 7 integrates angle testing, time and cab 7 attitude deviation testing functions, and monitors the duration of each roll / fall cycle, maximum roll angle and the difference in displacement coordinates between the driver and passenger sides of the cab 7 in real time. An alarm will be triggered when any of the above data values ​​deviates from the corresponding set parameter by less than the set threshold, reminding the test personnel to perform maintenance and inspection, and displaying the abnormal fault point on the electronic control interface. When any of the above data values ​​deviates from the set parameters by more than the set threshold, the control box 1 will immediately control the lifting pump 4 to depressurize and stop, and the cab 7 will automatically control its descent to avoid greater safety hazards. It should be noted that the above thresholds, the cab 7's tilting limit angle, and other data were determined based on actual test results. In addition, once the cab tilting and lowering cycle is complete, a cab locking signal is received. The locking signal is analyzed. If the locking signal does not meet the preset standard, an audible and visual alarm is triggered; otherwise, a normal signal is issued. For example, in electromagnetic locking, when the electromagnetic lock is energized, it generates an electrical signal. The locking signal is the signal indicating whether the control box 1 receives the signal indicating that the electromagnetic lock is energized. If it does, the control box lights up a green light; otherwise, the control box 1 issues an audible and visual alarm. In actual manufacturing, the audible and visual alarm is installed in the driver's cab.

[0037] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A rollover test bench integrating a multi-platform driver's cab, characterized in that, include A bench welding base, on which a cab is hinged, is provided; and the bench welding base is provided with mounting positions for different suspension mechanisms that are compatible with various cab series. An environmental perception sensor is fixed on a welded base on a frame at the front of the cab. The test monitoring sensor is fixed on the side of the wheel arch of the cab and is used to monitor the cab attitude deviation test; A drive unit, which is mounted on the welded base of the bench and connected to the cab, is used to rotate the cab toward the installation direction of the environmental perception sensor; The control box is electrically connected to the environmental sensing sensor, the test monitoring sensor, and the drive equipment. The remote control device is connected to the control box via a signal. The control box is configured to control the start and stop of the drive equipment based on feedback data from environmental perception sensors and test monitoring sensors. The remote control device is configured to remotely control the operation of the control box.

2. The tilting test bench with an integrated multi-platform cab according to claim 1, characterized in that, The drive equipment includes a lifting pump, a lifting cylinder, a reversing valve controller, and a control shaft; The lifting cylinder is hinged to the welded base of the frame and the cab at both ends. The lifting pump oil circuit is connected to the lifting cylinder. The reversing valve controller is fixedly installed and rotatably connected to the reversing handle of the lifting pump through the control shaft. The control box is used to input positive and negative voltages to the reversing valve controller, which drives the control shaft to rotate in both directions to achieve upshifting and downshifting.

3. The tilting test rig with an integrated multi-platform cab according to claim 2, characterized in that, The lifting pump is equipped with a pressure sensor for detecting pressure changes during the cab's tilting / lowering process, and the platform welding base is connected to the cab by a steel wire rope.

4. The tilting test rig with integrated multi-platform cab according to claim 1, characterized in that, The driver's cab is centrally mounted on the welded base of the platform.

5. A control method for a rollover test bench with an integrated multi-platform cab according to any one of claims 1 to 4, characterized in that, According to the cab test mode, the remote control device or control box controls the drive equipment to complete the corresponding test operation steps based on feedback from environmental perception sensors and test monitoring sensors. The cab test modes include: The first mode is used for environmental safety perception and early warning of the flipped test bench; The second mode is used for self-inspection of the flipped test bench fixture; The third mode is for remote control of the flipping test bench; The fourth mode is used for monitoring process data and automatic judgment of the flip test bench.

6. The control method according to claim 5, characterized in that, The first mode includes: The environmental perception sensor monitors the area in front of the cab in real time, and generates an abnormal detection signal if an obstacle is detected within a preset range. The control box receives the abnormal detection signal from the environmental perception sensor, controls the flip condition circuit in the control box to disconnect, and triggers an audible and visual alarm until the obstacle is moved out.

7. The control method according to claim 5, characterized in that, The second mode includes: Environmental perception sensors monitor the displacement of the welded base of the test bench during the cab's rollback and fall, and perform corresponding operations accordingly. If the displacement is less than the set threshold, the control box will issue an audible and visual alarm and display the abnormal fault point on the electrical control interface. If the displacement is not less than the set threshold, the control box controls the drive equipment to stop and drives the cab to fall back.

8. The control method according to claim 5, characterized in that, The third mode includes: If the test environment becomes abnormal; The operator uses the remote control device to issue a stop command to the control box to stop the test until the maintenance is completed. Then, the operator uses the remote control device to issue a start command to the control box to start the test.

9. The control method according to claim 5, characterized in that, The fourth mode includes: The test monitoring sensor monitors the cab attitude data in real time and performs corresponding operation processing. If the deviation of the cab posture data from the set parameters is less than the set threshold, the control box will trigger an alarm and display the abnormal fault point on the electronic control interface. If the deviation of the cab posture data from the set parameters is greater than the set threshold, the control box controls the drive equipment to depressurize and stop.

10. The control method according to claim 9, characterized in that, The test monitoring sensor monitors the cab attitude data in real time and performs corresponding operational processing, including: Once the cab tilting and lowering cycle is complete, obtain the cab locking signal; If the locking signal does not meet the preset standard, an audible and visual alarm is triggered; otherwise, a normal signal is issued.

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