Vehicle posture early warning device of multi-axle rotary drum test bed

Abstract

A vehicle attitude warning device for a multi-axis rotary drum test bench relates to the field of motor vehicle testing equipment technology. The test bench includes a frame and a vehicle clearance plate on its upper side. Several mounting openings are provided on the vehicle clearance plate, and rotary drum bodies are installed within these openings. The vehicle attitude warning device includes a detection module located at both ends of the axial direction corresponding to each rotary drum body, capable of detecting the tire position of the vehicle; a processing module, an alarm module, and a display electrically connected to the detection module; the detection module includes a distance sensor and a protective mechanism driven by the sensor vertically through the vehicle clearance plate. The protective mechanism is located on the side of the distance sensor closest to the rotary drum body and is configured to move the distance sensor to the underside of the vehicle clearance plate. This device enables contactless tire warning, allows the driver inside the vehicle to adjust the vehicle attitude via the display, and protects the distance sensor through the protective mechanism, thus improving the accuracy, efficiency, and safety of the test.

Description

Technical Field

[0001] This invention relates to the field of motor vehicle testing equipment technology, specifically to a vehicle attitude warning device for a multi-axis rotary drum test bench. Background Technology

[0002] The automotive chassis dynamometer is an indoor bench test equipment that uses rollers to simulate road surfaces to test the performance of vehicles, including power, emissions under various operating conditions, and fuel efficiency. During the test, in order to improve the test accuracy, the test personnel need to ensure that the vehicle is aligned with the chassis dynamometer to accurately simulate road resistance.

[0003] There are currently two main methods for centering the vehicle. The first method relies on at least two testers working together. One tester drives the vehicle while the other observes it from the outside. Centering is achieved through their cooperation, but this method has low accuracy and efficiency. The second method uses hardware at both ends of the roller to limit the tire's deviation on the roller. For example, the guide roller in the automotive chassis dynamometer and its measurement control method (application number CN200910108305.3) positions the tire on the roller to prevent it from shifting or sliding off the roller axially when the roller rotates at high speeds. However, since the guide roller needs to contact the tire for positioning, it affects the test results. On the one hand, the tire may be damaged. On the other hand, for heavy vehicles, the driver cannot notice the contact between the guide roller and the tire in time, especially when the roller is first started, as the tire will bounce significantly. At this time, the guide roller may have been damaged by the heavy vehicle and lost its limiting function, and continuing the test would pose a significant safety hazard. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle attitude warning device for a multi-axis rotary drum test bench. It achieves non-contact warning of the vehicle tires by setting a distance sensor, and alarms when the tire deviation distance exceeds a preset value. At the same time, the deviation data can be displayed on a display screen, and the driver inside the vehicle can adjust the vehicle attitude according to the display content to maintain the vehicle's alignment on the drum. In addition, a protective mechanism is provided to protect the distance sensor when the tire gets close to it, thereby improving the test accuracy, test efficiency and safety.

[0005] The technical solution of the present invention is as follows:

[0006] A vehicle attitude warning device for a multi-axis rotary drum test bench, wherein the test bench includes a frame and a vehicle passage plate on its upper side, and a number of mounting holes are provided on the vehicle passage plate. A rotary drum body is installed in the mounting holes. During the test, each tire of the vehicle is located on the rotary drum body at the corresponding position. The road surface is simulated by the rotary drum body, thereby testing the vehicle performance.

[0007] The vehicle attitude warning device includes a detection module that is set at both ends of the axial direction of each drum body and is capable of detecting the tire position of the vehicle, as well as a processing module, an alarm module and a display that are electrically connected to the detection module.

[0008] The detection module includes a distance sensor and a protective mechanism that is connected to it and can drive it vertically through the vehicle body. The protective mechanism is located on the side of the distance sensor closer to the drum body.

[0009] During use, when the tire position changes, the value detected by the distance sensor changes accordingly. The driver in the vehicle can adjust the vehicle's position by using the data displayed on the monitor to maintain the vehicle's alignment on the drum body, thereby improving test accuracy and increasing test efficiency compared to using two testers working together. Furthermore, the alarm module can be set to sound an alarm when the distance sensor detects that the tire deviation exceeds a preset distance value, thus achieving non-contact warning of the vehicle's tires and improving test safety.

[0010] For example, when any distance sensor detects that the distance between the tire sidewall and the inner side of the drum body is less than 10mm, the drive alarm module will issue an audible and visual alarm.

[0011] The protective mechanism is used to protect the distance sensor from being damaged by the tire;

[0012] Furthermore, the protective mechanism includes an upward-facing fixed base and a first sliding member with its inner side vertically slidable and its opening downward. The outer wall of the first sliding member is vertically slidably engaged with the inner wall of the fixed base. A hollow support platform is vertically provided in the middle of the fixed base. A sliding rod is vertically slidably and elastically connected to the inner side of the first sliding member within the support platform. The sliding rod and the first sliding member move in opposite directions. The lower end of the sliding rod passes through the fixed base and is connected to a distance sensor via a linkage assembly. The linkage assembly is configured to drive the distance sensor to move in the opposite direction when the sliding rod moves vertically.

[0013] In use, since the protective mechanism is located on the side of the distance sensor close to the drum body, when the vehicle's tire deviates from the drum body and approaches the distance sensor, the tire will first contact the first sliding member of the protective mechanism. At this time, the first sliding member moves downward under the tire pressure, the sliding rod moves upward, and then the linkage assembly will drive the distance sensor to move downward. The distance sensor is designed to be able to move completely downward to the underside of the overpass when the tire presses down on the first sliding member, thereby preventing the tire from damaging the distance sensor when it moves close to the distance sensor.

[0014] Understandably, this vehicle attitude warning device also includes a detection switch electrically connected to the processing module. When the processing module receives a signal from the detection switch that the first sliding member has moved downward, it drives the alarm module to sound an alarm. The test personnel can quickly control the vehicle and the drum body to stop or perform other actions based on the alarm to avoid other safety problems from occurring.

[0015] Furthermore, a first sliding groove is provided laterally on the support platform, and an inclined second sliding groove is provided in the middle of the sliding rod. A second sliding member is slidably provided in the first sliding groove, passing through the second sliding groove of the sliding rod. The two sides of the second sliding member slide in cooperation with the inner side of the first sliding member, and are configured to slide laterally along the first sliding groove under the push of the first sliding member, thereby driving the sliding rod to move in the opposite direction of the movement direction of the first sliding member.

[0016] The aforementioned second sliding member, together with the sliding rod and the first sliding member, forms an inclined plane transmission structure, and the two inclined plane transmission structures are inclined in opposite directions.

[0017] Specifically, the second sliding member includes a first push block that is inclined and second push blocks at both ends. The first push block slides in cooperation with the second slide groove and its length is greater than the length of the second slide groove. The upper and lower sides of the two second push blocks have planes that slide in cooperation with the first slide groove. The side opposite to each other also has an inclined surface that forms an inclined surface with the lower inner side of the first sliding member, and the inclined surface is opposite to the inclination direction of the first push block.

[0018] To facilitate the installation of the second sliding member, the first push block includes two detachably connected inclined blocks, and the two second push blocks are respectively located at different ends of the two inclined blocks, and the push block and the corresponding inclined block are integrally manufactured.

[0019] Furthermore, the two inclined blocks are designed to be connected and fixed in the second slide groove by screws after being inserted into the second slide groove. The sides that fit together are designed to interlock. The four surfaces formed after the two inclined blocks are connected together are four planes that slide in cooperation with the second slide groove. The fixed base, the first sliding member and the sliding rod are also provided with interconnected mounting holes. The mounting holes are designed to allow tools to be inserted from the outside to turn the screws and disassemble the two inclined blocks.

[0020] Furthermore, the upper end of the sliding rod is provided with a boss that abuts against the upper side of the support platform, and the boss has an inverted "T" shape. Its upper end is elastically connected to the first sliding member by a spring, so as to facilitate the compression and reset of the spring between the boss and the first sliding member.

[0021] In one preferred embodiment, the upper outer circumferential surface of the first sliding member has a tapered structure that is narrower at the top and wider at the bottom. This allows the tire to be guided into contact with the first sliding member by the inclined surface of the tapered surface when the tire deflects from different angles. Furthermore, the top outer surface of the first sliding member is set as a flat surface to provide a uniform force-bearing surface, ensuring a balanced pressure distribution when the tire is fully pressed against the first sliding member. This prevents localized stress concentration that could cause the first sliding member to tilt or jam. Additionally, a connecting post is provided on the top inner surface of the first sliding member corresponding to the boss to facilitate the installation of the spring.

[0022] In one preferred embodiment, the linkage assembly includes a support rod located below the distance sensor and slidably connected to the frame vertically, and a swing arm hinged between the support rod and the sliding rod.

[0023] The middle part of the swing arm is provided with a second fixed rod that is fixedly connected to the frame. The end of the swing arm that is hinged to the sliding rod is also provided with a fourth sliding groove in the transverse direction, and a hinge member that is hinged to the sliding rod is slidably provided in the fourth sliding groove.

[0024] The support rod has a third sliding groove vertically opened on it, and the frame also has a first fixed rod that passes through the third sliding groove and slides in cooperation with the third sliding groove.

[0025] The lower end of the support rod and the sliding rod is provided with a U-shaped groove with the opening facing downward. The swing arm is hinged to the support rod and the sliding rod in the U-shaped groove. The U-shaped groove can prevent the swing arm from swinging along the axial direction of the first fixed rod, thereby improving stability.

[0026] The test bench's drum body includes a single drum body or a double drum body. As one implementation of the vehicle attitude warning device, the distance sensor is set to be located on the same plane as the first sliding member, with the distance sensor protruding above the first sliding member and horizontally pointing towards the tire on the single or double drum body. This is to protect the distance sensor during vehicle testing when the drum body rotates at a high speed and the tire deviates a large distance at a relatively fast speed, especially when the drum body is just started and the tire has a large bounce and slips off the drum body, and the distance sensor cannot respond quickly, so that the driver cannot obtain the tire's deviation distance in time. Preferably, the distance sensor is set horizontally towards the lowest point of the tire on the single or double drum body.

[0027] The drum body of this test bench includes a single drum body or a double drum body. In another implementation of this vehicle attitude warning device, the distance sensor is located on the side away from the vehicle's direction of entry relative to the protective mechanism, and is tilted towards the middle of the tire on the single or double drum body. This arrangement can not only protect the distance sensor during the test, but also when the vehicle enters the drum body of the test bench. Preferably, the protective mechanism is located on the same plane as the tire on the single or double drum body, and the angle between the protective mechanism and the tilting direction of the distance sensor is 25°-40°.

[0028] The beneficial effects of this invention compared to the prior art are as follows:

[0029] 1. By using distance sensors located at both ends of the drum body along the axis, the tire offset distance can be detected when the vehicle deviates, and the offset data can be displayed on the screen. This allows the driver inside the vehicle to adjust the vehicle's attitude to maintain the vehicle's alignment on the drum body, thereby improving the test accuracy and increasing the test efficiency compared to using two testers working together.

[0030] 2. An alarm module electrically connected to the distance sensor will issue an alarm when the distance sensor detects that the tire deviation exceeds a preset distance value, thereby achieving non-contact warning of the vehicle's tires and improving the safety of the test;

[0031] 3. By setting a protective mechanism on the side of the distance sensor close to the drum body, when the tire approaches the distance sensor, the protective mechanism will move the distance sensor down to the underside of the vehicle plate, thereby protecting the distance sensor. Attached Figure Description

[0032] In the attached diagram:

[0033] Figure 1 This is a schematic diagram of the installation position of a vehicle attitude warning device for a multi-axis rotary drum test bench in Embodiment 1 of the present invention;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure of the overpass and the protective mechanism cut from point AA (the distance sensor and the upper part of the first sliding member extend out of the upper side of the overpass).

[0035] Figure 3 for Figure 1 A schematic diagram of the structure of the overpass and the protective mechanism cut from point AA (the distance sensor and the upper part of the first sliding member extend into the lower side of the overpass).

[0036] Figure 4 for Figure 2 An enlarged structural diagram of the central protective mechanism;

[0037] Figure 5 This is a schematic diagram of the second sliding member;

[0038] Figure 6 This is a schematic diagram of the installation position of a vehicle attitude warning device for a multi-axis rotary drum test bench in Embodiment 2 of the present invention;

[0039] The components represented by the various reference numerals in the diagram are:

[0040] 1. Vehicle platform; 2. Drum body; 21. Single drum body; 22. Double drum body; 3. Detection module; 31. Distance sensor; 32. Fixing base; 321. Annular cylinder; 322. Support platform; 3221. First slide groove; 33. First sliding member; 34. Spring; 35. Sliding rod; 351. Second slide groove; 352. Boss; 36. Second sliding member; 361. First push block; 3611. Inclined block; 362. Second push block; 3621. Inclined surface; 363. Screw; 371. Support rod; 3711. Third slide groove; 372. First fixing rod; 373. Swing rod; 3731. Fourth slide groove; 374. Second fixing rod; 4. Tire. Detailed Implementation

[0041] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0042] Example

[0043] Combination Figure 1 This embodiment provides a vehicle attitude warning device for a multi-axis rotary drum test bench. The test bench includes a frame and a vehicle passage plate 1 on its upper side. The vehicle passage plate 1 has several mounting holes, and a rotary drum body 2 is installed in the mounting holes. During the test, each tire 4 of the vehicle is located on the rotary drum body 2 at the corresponding position. The rotary drum body 2 simulates the road surface, thereby testing the vehicle performance.

[0044] The vehicle attitude warning device includes a detection module 3, which is provided at both ends of the axial direction of each drum body 2 and is capable of detecting the position of the vehicle's tires 4, as well as a processing module, an alarm module, and a display that are electrically connected to the detection module 3.

[0045] The detection module 3 includes a distance sensor 31 and a protective mechanism that is connected to it and can drive it to pass vertically through the vehicle plate 1. The protective mechanism is located on the side of the distance sensor 31 close to the drum body 2. The distance sensor 31 is a non-contact distance sensor 31.

[0046] When in use, when the position of tire 4 changes, the value detected by distance sensor 31 changes accordingly. The driver in the vehicle can adjust the position of the vehicle by using the data displayed on the monitor to keep the vehicle aligned on the drum body 2, thereby improving the test accuracy and increasing the test efficiency compared to using two testers working together. Furthermore, the alarm module can be set to sound an alarm when the distance sensor 31 detects that the tire 4 has deviated from the preset distance value, thereby achieving non-contact warning of the tire 4 of the vehicle and improving the safety of the test.

[0047] For example, in this embodiment, the alarm method is set such that when the distance sensor 31 detects that the distance between the side of the tire 4 and the inner side of the drum body 2 is less than 10mm, the alarm module is driven to issue an audible and visual alarm.

[0048] The protective mechanism in this embodiment is used to protect the distance sensor 31 and prevent the tire 4 from crushing the distance sensor 31.

[0049] Combination Figure 4 The protective mechanism includes an upward-facing fixed base 32 and a downward-facing first sliding member 33 with its inner side vertically slidable. The outer wall of the first sliding member 33 is vertically slidably engaged with the inner wall of the fixed base 32. The fixed base 32 includes a support plate connected to the frame, an annular cylinder 321 vertically mounted on the support plate, and a hollow support platform 322. The support platform 322 is located in the middle of the annular cylinder 321. A sliding rod 35, which is vertically elastically connected to the inner side of the first sliding member 33, is also vertically slidably mounted inside the support platform 322. The sliding rod 35 and the first sliding member 33 move in opposite directions.

[0050] Specifically, the support platform 322 is also provided with a first sliding groove 3221 in the horizontal direction, and the middle part of the sliding rod 35 is provided with an inclined second sliding groove 351. A second sliding member 36 is provided in the first sliding groove 3221 in the horizontal direction, passing through the second sliding groove 351 of the sliding rod 35. The two sides of the second sliding member 36 are slidably engaged with the inner side of the first sliding member 33, and are configured to slide laterally along the first sliding groove 3221 under the push of the first sliding member 33, thereby driving the sliding rod 35 to move in the opposite direction of the movement of the first sliding member 33.

[0051] Combination Figure 2 and Figure 3 The lower end of the sliding rod 35 passes through the fixed base 32 and is connected to the distance sensor 31 via a linkage assembly. The linkage assembly is configured to drive the distance sensor 31 to move in the opposite direction when the sliding rod 35 moves vertically.

[0052] In use, since the protective mechanism is located on the side of the distance sensor 31 close to the drum body 2, when the vehicle's tire 4 deviates from the drum body 2 and approaches the distance sensor 31, the tire 4 will first contact the first sliding member 33 of the protective mechanism. At this time, the first sliding member 33 moves down under the pressure of the tire 4, and then the sliding rod 35 moves up through the cooperation of the second sliding groove 351 and the second sliding member 36. Finally, the distance sensor 31 is driven down through the linkage assembly, so that when the first sliding member 33 moves down under the pressure of the tire 4, the distance sensor 31 also moves down. The distance sensor 31 is set to be able to move completely down to the underside of the vehicle plate 1 when the tire 4 presses down on the first sliding member 33, thereby preventing the tire 4 from sliding off the drum body 2 and damaging the distance sensor 31.

[0053] It is understandable that this vehicle attitude warning device also includes a detection switch electrically connected to the processing module. When the processing module receives a signal from the detection switch that the first sliding member 33 has moved down, it drives the alarm module to sound an alarm. The test personnel can quickly control the vehicle and the drum body 2 to stop or perform other processing based on the alarm to avoid other safety problems from occurring.

[0054] The detection switch is a photoelectric switch or a proximity switch. In this embodiment, the detection switch is preferably a photoelectric switch provided on the annular cylinder 321, and a detection hole is opened on the outer ring of the middle part of the first sliding member 33 corresponding to the photoelectric switch.

[0055] Combination Figure 2 and Figure 3 The linkage assembly includes a support rod 371 located below the distance sensor 31 and slidably connected to the frame vertically, and a swing rod 373 hinged between the support rod 371 and the sliding rod 35; the middle part of the swing rod 373 is rotatably provided with a second fixed rod 374 fixedly connected to the frame, and the end of the swing rod 373 that is hinged to the sliding rod 35 is also provided with a fourth sliding groove 3731 in the transverse direction, and a hinge member that is hinged to the sliding rod 35 is slidably provided in the fourth sliding groove 3731.

[0056] The support rod 371 has a third sliding groove 3711 vertically opened on it, and the frame is also fixedly connected to a first fixed rod 372 that passes through the third sliding groove 3711 and slides with the third sliding groove 3711.

[0057] The lower end of the support rod 371 and the sliding rod 35 is provided with a U-shaped groove with the opening facing downward. The swing rod 373 is hinged to the support rod 371 and the sliding rod 35 in the U-shaped groove. The U-shaped groove can prevent the swing rod 373 from swinging along the axial direction of the first fixed rod 372, thereby improving stability.

[0058] As needed, in a preferred embodiment, the distance sensor 31 is further provided with a protective shell, and the protective shell is provided with a detection clearance notch on the side near the drum body 2. The support rod 371 is connected to the lower side of the protective shell, and the distance sensor 31 can be detachably installed inside the protective shell to further protect the distance sensor 31.

[0059] The upper end of the sliding rod 35 is provided with a boss 352 that abuts against the upper side of the support platform 322, and the boss 352 has an inverted "T" shaped structure. Its upper end is elastically connected to the first sliding member 33 by a spring 34, so as to facilitate the compression and reset of the spring 34 between the boss 352 and the first sliding member 33.

[0060] Furthermore, as the first sliding member 33 moves downward, its contact area with the inner wall of the fixed seat 32 gradually increases. During the compression process of the spring 34, it can provide a progressive damping effect, preventing the device from vibrating due to the sudden release of the spring 34 during reset.

[0061] Combination Figure 2 When the tire 4 presses down and the first sliding member 33 moves downward, the upper end of the sliding rod 35 abuts against the upper side of the support platform 322, and the spring 34 is in a compressed state. At the same time, the inclined surfaces 3621 on the two inner sides of the lower part of the first sliding member 33 slide in cooperation with the inclined surfaces 3621 of the second push block 362, and push the second sliding member 36 to slide laterally to the left along the first sliding groove 3221 during the downward movement, thereby driving the sliding rod 35 to move upward along the support platform 322, and then driving the distance sensor 31 to move to the lower side of the vehicle plate 1 through the linkage assembly.

[0062] Combination Figure 3 When the tire 4 leaves the first sliding member 33, the spring 34, which is in a compressed state, is reset under the action of elastic force. The first sliding member 33 and the second sliding member 36 both move upward to the initial position, that is, the first sliding member 33 and the distance sensor 31 extend from the upper side of the vehicle plate 1.

[0063] Combination Figure 2 and Figure 3 The upper outer peripheral surface of the first sliding member 33 has a tapered structure that is narrower at the top and wider at the bottom. When the tire 4 deviates from different angles (such as turning left or right or sliding obliquely), the inclined surface 3621 of the tapered surface guides the tire 4 to contact the first sliding member 33. Specifically, when the tire 4 approaches in a non-perpendicular direction, the inclined sidewall of the tapered surface can convert the lateral force of the tire 4 into a downward force on the first sliding member 33, ensuring that the first sliding member 33 moves down smoothly. Thus, when the tire 4 approaches the distance sensor 31 from different angles, it can drive the distance sensor 31 to move towards the lower side of the vehicle plate 1.

[0064] Combination Figure 2 and Figure 3The top outer surface of the first sliding member 33 is flat to provide a uniform force-bearing surface, ensuring that the pressure distribution is balanced when the tire 4 is fully pressed on the first sliding member 33, and avoiding local stress concentration that could cause the first sliding member 33 to tilt or jam. The top inner surface of the first sliding member 33 is provided with a connecting post corresponding to the boss 352 to facilitate the installation of the spring 34.

[0065] Combination Figure 4 The second sliding member 36, together with the sliding rod 35 and the first sliding member 33, forms an inclined plane 3621 transmission structure, and the two inclined planes 3621 transmission structures are inclined in opposite directions.

[0066] Specifically, the second sliding member 36 includes a first push block 361 inclined and second push blocks 362 at both ends. The first push block 361 slides with the second slide groove 351 and its length is greater than the length of the second slide groove 351. The upper and lower sides of the two second push blocks 362 have planes that slide with the first slide groove 3221. The side opposite to each other also has an inclined surface 3621 that forms an inclined surface 3621 with the lower inner side of the first sliding member 33. The inclined surface 3621 is in the opposite direction to the first push block 361. In this embodiment, preferably, the inclination angle of the first push block 361 relative to the horizontal plane is 30°, and preferably the included angle between the inclined surface 3621 and the first push block 361 is 90°.

[0067] The two second push blocks 362 also have a vertical limiting plane on the side near the sliding rod 35, and the limiting plane of the two second push blocks 362 is at 90° with the upper and lower horizontal planes of the two second push blocks 362 respectively. When the two second push blocks 362 slide to the point where the limiting plane on the side of the sliding direction abuts against the sliding rod 35, the sliding stops.

[0068] To facilitate the installation of the second sliding member 36, the first push block 361 includes two detachably connected inclined blocks 3611, and the two second push blocks 362 are respectively located at different ends of the two inclined blocks 3611, and the push block and the corresponding inclined block 3611 are integrally manufactured.

[0069] Combination Figure 5 During installation, the two inclined blocks 3611 are inserted from both sides of the second slide groove 351 and are connected and fixed in the second slide groove 351 by screws 363. The side that fits against each other is designed to interlock. The four surfaces formed by the two inclined blocks 3611 after being connected together are four planes that slide and cooperate with the second slide groove 351. The fixing base 32, the first sliding member 33 and the sliding rod 35 are also provided with interconnected mounting holes. The mounting holes are designed to allow tools to be inserted into the second slide groove 351 from the outside to turn the screws 363 to disassemble and install the two inclined blocks 3611.

[0070] Preferably, the screw 363 is a countersunk screw with a conical head and a slotted head. The conical head can be flush with the surface of the wedge block 3611, thereby ensuring the flatness of the surface of the wedge block 3611. The slotted head on the top of the screw 363 facilitates tightening and disassembly using a flathead screwdriver, and the slotted head is easier to align.

[0071] The drum body 2 of this test bench includes a single drum body 21 or a double drum body 22, combined with Figure 1 In some embodiments, the distance sensor 31 is configured to be located on the same plane as the first sliding member 33, and the distance sensor 31 protrudes above the first sliding member 33 and is horizontally positioned towards the tire 4 on the single drum body 21 or the double drum body 22. This is to protect the distance sensor 31 during vehicle testing when the drum body 2 rotates at a high speed and the tire 4 deviates a large distance at a relatively fast speed, especially when the drum body 2 is just started and the tire 4 has a large bounce and slides off the drum body 2, and the distance sensor 31 cannot respond quickly, so that the driver cannot obtain the deviation distance of the tire 4 at this time. Preferably, the distance sensor 31 is horizontally positioned towards the lowest point of the tire 4 on the single drum body 21 or the double drum body 22.

[0072] Combination Figure 6 In other embodiments, the distance sensor 31 is located on the side away from the vehicle's direction of travel relative to the protective mechanism, and is tilted towards the middle of the tire 4 on the single drum body 21 or the double drum body 22. This arrangement can not only protect the distance sensor 31 during the test, but also protect the distance sensor 31 when the vehicle enters the drum body 2 of the test bench. Preferably, the protective mechanism and the tire 4 on the single drum body 21 or the double drum body 22 are located on the same plane, and the angle between the protective mechanism and the tilting direction of the distance sensor 31 is 25°-40°.

Claims

1. A vehicle attitude warning device for a multi-axis rotary drum test bench, the test bench comprising a frame and a vehicle passage plate (1) on its upper side, the vehicle passage plate (1) having a plurality of mounting openings, and a rotary drum body (2) installed in the mounting openings, characterized in that: The vehicle attitude warning device includes a detection module (3) that is provided at both ends of the axial direction of each of the drum bodies (2) and is capable of detecting the position of the vehicle's tires (4), as well as a processing module, an alarm module and a display that are electrically connected to the detection module (3); The detection module (3) includes a distance sensor (31) and a protective mechanism that is connected to it and can drive it to pass vertically through the vehicle plate (1). The protective mechanism is located on the side of the distance sensor (31) close to the drum body (2). The protective mechanism includes a fixed seat (32) with the opening facing upward and a first sliding member (33) with the opening facing downward and vertically slidable inside. The fixed seat (32) has a hollow support platform (322) vertically arranged in the middle. The support platform (322) has a sliding rod (35) that is vertically elastically connected to the inner side of the first sliding member (33) and the sliding rod (35) and the first sliding member (33) have opposite moving directions. The support platform (322) is provided with a first sliding groove (3221) in the horizontal direction, and the middle part of the sliding rod (35) is provided with an inclined second sliding groove (351). The first sliding groove (3221) is provided with a second sliding member (36) that passes through the sliding rod (35) and the second sliding groove (351) in the horizontal direction. The two sides of the second sliding member (36) are slidably engaged with the inner side of the first sliding member (33), and are configured to be able to slide horizontally along the first sliding groove (3221) under the push of the first sliding member (33), thereby driving the sliding rod (35) to move in the opposite direction of the movement of the first sliding member (33). The lower end of the sliding rod (35) passes through the fixed base (32) and is connected to the distance sensor (31) via a linkage assembly. The linkage assembly is configured to drive the distance sensor (31) to move in the opposite direction when the sliding rod (35) moves vertically. The linkage assembly includes a support rod located below the distance sensor and vertically slidably connected to the frame, and a swing rod hinged between the support rod and the sliding rod. The middle part of the swing rod is rotatably provided with a second fixed rod fixedly connected to the frame. The end of the swing rod that is hinged to the sliding rod is also provided with a fourth sliding groove laterally, and a hinge member that is hinged to the sliding rod is slidably provided in the fourth sliding groove. This vehicle attitude warning device also includes a detection switch electrically connected to the processing module. When the processing module receives a signal from the detection switch that the first sliding member has moved down, it drives the alarm module to sound an alarm.

2. The vehicle attitude warning device for a multi-axis rotary drum test bench as described in claim 1, characterized in that, The second sliding member (36) forms an inclined plane transmission structure with the sliding rod (35) and the first sliding member (33), and the two inclined plane transmission structures are inclined in opposite directions.

3. The vehicle attitude warning device for a multi-axis rotary drum test bench as described in claim 2, characterized in that, The second slider (36) includes a first push block (361) set at an angle and second push blocks (362) at both ends; The first push block (361) slides with the second slide groove (351) and its length is greater than the length of the second slide groove (351). The two second push blocks (362) have planes that slide with the first slide groove (3221) on their upper and lower sides. The side opposite to each other also has an inclined surface (3621) that forms an inclined surface with the lower inner side of the first sliding member (33). The inclined surface (3621) is opposite to the inclination direction of the first push block (361).

4. The vehicle attitude warning device for a multi-axis rotary drum test bench as described in claim 3, characterized in that, The first push block (361) includes two detachably connected inclined blocks (3611), and the two second push blocks (362) are respectively located at different ends of the two inclined blocks (3611).

5. The vehicle attitude warning device for a multi-axis rotary drum test bench as described in claim 3, characterized in that, The upper end of the sliding rod (35) is provided with a boss (352) that abuts against the upper side of the support platform (322). The boss (352) has an inverted "T" shape, and its upper end is elastically connected to the first sliding member (33) by a spring (34).

6. The vehicle attitude warning device for a multi-axis rotary drum test bench as described in claim 1, characterized in that, The upper outer periphery of the first slider (33) has a tapered structure that is narrow at the top and wide at the bottom, and the top outer surface of the first slider (33) is a plane.

7. A vehicle attitude warning device for a multi-axis rotary drum test bench as described in any one of claims 1-6, characterized in that, The distance sensor (31) is located on the same plane as the first slider (33), protrudes above the first slider (33), and is positioned horizontally toward the tire (4) on the drum body (2).

8. A vehicle attitude warning device for a multi-axis rotary drum test bench as described in any one of claims 1-6, characterized in that, The distance sensor (31) is located on the side away from the vehicle's direction of travel relative to the protective mechanism, and is tilted towards the middle of the tire (4) on the drum body (2).

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