A vehicle body bottom detection device
By designing a vehicle body under-body inspection device and adopting a gantry structure and automated lifting technology, the problems of inconvenient passage and safety hazards in inspecting the underside of automobile bodies have been solved, achieving an efficient and safe inspection process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GAC HONDA AUTOMOBILE CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing technology, the inspection of weld points at the bottom of the car body has problems such as inconvenient personnel access, insufficient operating space, and difficulty in emergency evacuation. In particular, when inspecting under the narrow conveyor rails, the difficulty of maintenance and safety hazards are increased.
Design a vehicle body underside inspection device that adopts a gantry structure. By combining a lifting device and a rangefinder, the vehicle body is automatically lifted to facilitate inspection by staff. A sliding rail and a positioning detection device are set up to realize the automated lifting and positioning of the vehicle body, ensuring safe and efficient inspection.
It enables automated inspection of the underside of the car body, improves the utilization of operating space, reduces the risk of evacuation in emergency situations, and lowers the difficulty and time cost of maintenance.
Smart Images
Figure CN224500424U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle body inspection technology, and more specifically, to a vehicle body bottom inspection device. Background Technology
[0002] After the automotive body-in-white is manufactured, the weld points on the bottom of the body-in-white need to be manually inspected to rule out issues such as incomplete or missing welds in the chassis, thus preventing substandard quality or even safety hazards in the vehicles leaving the factory. Current technology typically involves constructing a cage-like structure below the conveyor rails, allowing workers to visually inspect the bottom of the automotive body-in-white located on the conveyor rails. However, this approach has several problems: First, it hinders personnel movement, as workers need to descend below the conveyor rails for inspection, and the space below the rails is cramped, making movement difficult. Second, the cage-like structure occupies space below the conveyor rails; if equipment at the bottom of the conveyor line (such as transmission components or cables) needs maintenance, insufficient operating space increases the difficulty and time cost of repairs. Third, it does not consider rapid evacuation routes or methods in emergency situations, such as fires or severe equipment malfunctions, requiring workers to climb out from under the conveyor rails, failing to meet the need for rapid escape. Utility Model Content
[0003] To address the aforementioned issues, this invention provides a vehicle body undercarriage inspection device that can be installed on the vehicle body conveyor track and automatically lifts the vehicle body, allowing workers to directly access the undercarriage for inspection.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a vehicle body bottom detection device, including columns, crossbeams, and a lifting device. At least two columns are provided, with the tops of the two columns respectively connected to both ends of the crossbeam to form a gantry structure. The lifting device is installed below the crossbeam and is equipped with a positioning detection device. A slide rail is provided vertically on the column, and the slide rail is slidably connected to the lifting device. An upper limit switch and a lower limit switch are provided on the slide rail. A first driving component for driving the lifting device is provided on the column or the crossbeam. A distance measuring instrument for detecting the vehicle body is also provided on the ground below the crossbeam. The positioning detection device, the upper limit switch, the lower limit switch, the distance measuring instrument, and the first driving component are all electrically connected to an external controller.
[0005] In this technical solution, two columns are respectively set on both sides of the car conveyor guide rail, and a crossbeam is fixed to the top of the two columns to form a gantry structure. A lifting device is installed below the crossbeam to lift the car body. A first drive component is installed on the crossbeam or column to drive the lifting device to move vertically. After the lifting device lifts the car body off the ground to a certain height, workers can directly walk under the car body to visually inspect the bottom to confirm the presence of defects. Both columns are equipped with slide rails that slide with the lifting device. The slide rails restrict the movement direction of the lifting device to prevent swaying during the lifting process. A distance measuring instrument is installed on the ground below the crossbeam. When the car body is not transported to the bottom detection device, the distance measuring instrument cannot measure any data. Once the car body is transported to the bottom detection device, the distance measuring instrument can obtain the distance between the car body and the ground, thus confirming that the car body has reached the preset position. Furthermore, since different car bodies have different chassis heights, the different height data measured by the distance measuring instrument can also be used to identify different types of car bodies. After the rangefinder measures the relevant data, it transmits it to an external controller, which is a computer. The computer can automatically control the first drive component to move the lifting device. Workers can also monitor the working status and control the first drive component's movement via the computer. Upper and lower limit switches are installed on the slide rail to detect the lifting device's position and prevent it from moving too high or too low. Both upper and lower limit switches are connected to the external control component. The lifting device is also equipped with a positioning detection device to detect whether the vehicle body is properly placed on the vehicle and whether the lifting device has detached from the vehicle body. The lifting device has space for the vehicle body to move in. In the initial state, the lifting device is lowered, and the vehicle body is located on the conveyor rail. When the conveyor rail transports the vehicle body above the rangefinder, the rangefinder measures the distance between the vehicle body and the ground and sends it to the external controller. The external controller determines that the vehicle body is a preset model and sends a command to the first drive component. The first drive component drives the lifting device upwards. When the lifting device's detection device sends a signal to the external controller, it indicates that the vehicle body has been completely lifted by the lifting device, and the external controller continues to control the first drive component to lift the lifting device. Once the spreader has triggered the upper limit switch located on the slide rail, the upper limit switch sends a signal to the external controller. The external controller then controls the first drive component to stop the spreader from moving upwards. At this point, the operator can directly enter under the vehicle body to visually inspect its bottom. After the inspection is completed, the operator leaves the area under the vehicle body, and then the external controller controls the first drive component to lower the spreader. Once the vehicle body is placed back on the conveyor rail, the positioning detection device on the spreader no longer sends a signal to the external controller. Upon receiving the signal, the external controller can then relay it to the operator or directly to the conveyor rail. The conveyor rail then outputs the inspected vehicle body from the bottom inspection device.When the spreader triggers the lower limit switch, the lower limit switch sends a signal to the external controller. The external controller then controls the first drive unit to stop lowering the spreader and waits for the conveyor rail to input the next vehicle body for inspection.
[0006] Preferably, the positioning detection device includes a support plate, a proximity switch is provided on the lifting device, the proximity switch is located below the support plate, the support plate is mounted on the lifting device by a spring, and the proximity switch is electrically connected to the external controller.
[0007] Preferably, the support plate has a square frame structure, and the lifting device is also provided with pads, which are aligned with the inside of the frame of the support plate.
[0008] Preferably, the lifting device includes a top frame, vertical rods, and horizontal rods. The top frame is connected to the driving component. At least four vertical rods are provided, and the four vertical rods are respectively fixed at the four corners of the top frame. An accommodating space is formed between the top frame and each vertical rod. One end of the horizontal rod is fixed to the bottom end of the vertical rod, and the other end of the horizontal rod extends into the accommodating space. The positioning detection device is fixed to the end of the horizontal rod that extends into the accommodating space.
[0009] Preferably, a support rod is provided between two adjacent vertical rods in the front-to-back direction, and the two ends of the support rod are respectively connected to the vertical rods.
[0010] Preferably, a pressure rod is rotatably mounted on the support rod, and a second driving member is also provided on the support rod for driving the pressure rod to rotate toward the accommodating space. The second driving member is electrically connected to the external controller.
[0011] Preferably, the crossbeam is provided with an installation platform, the first driving component is a winch, the winch includes a rotary motor, a rotating shaft and a drum, the output end of the rotary motor is connected to the rotating shaft, the rotating shaft is rotatably mounted on the installation platform, the drum is mounted on the rotating shaft, a lifting rope is wound on the drum, and the lifting rope passes through the installation platform and is connected to the lifting device.
[0012] Preferably, the rotating shaft is further provided with a turntable, and the outer circumferential surface of the turntable is provided with a plurality of protrusions along the circumferential direction. An interlocking space is formed between two adjacent protrusions. The mounting platform is further provided with a telescopic component, the telescopic end of which can extend into the interlocking space. The telescopic component is electrically connected to the external controller.
[0013] Preferably, the rotary motor is further provided with an electromagnetic brake and a load sensor, and the load sensor is connected to the external controller.
[0014] Preferably, a fall protection device is also provided, which includes a fall protection rack and a fall protection clip. The fall protection rack is vertically fixed to the column, and the fall protection clip is installed on the lifting device. The fall protection clip can move in the direction of the fall protection rack and engage with the fall protection rack. The lifting device is also provided with a third driving member for driving the fall protection clip to rotate. The third driving member is electrically connected to the external controller. The fall protection clip is also provided with a second spring for pushing the fall protection clip into the fall protection rack.
[0015] Compared with the prior art, the advantages of this utility model are: it is equipped with a rangefinder to detect whether the vehicle body is in place and also to detect the vehicle body model; it is equipped with a position detection device, an upper limit switch and a lower limit switch to control the automatic lifting of the vehicle body, without the need for manual operation. Attached Figure Description
[0016] Figure 1 This is a perspective view of the vehicle body bottom detection device of this utility model;
[0017] Figure 2 This is a perspective view of the lifting device in the vehicle body bottom detection device of this utility model;
[0018] Figure 3 This is a perspective view of the positioning detection device in the vehicle body bottom detection device of this utility model.
[0019] In the attached diagram: 1. Column; 2. Horizontal beam; 3. Lifting device; 4. Position detection device; 5. Winch; 6. Anti-fall rack; 7. Rangefinder; 11. Slide rail; 41. Support plate; 42. Proximity switch; 43. Pad block; 31. Top frame; 32. Vertical rod; 33. Horizontal rod; 34. Support rod; 35. Pressure rod. Detailed Implementation
[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:
[0023] Example 1
[0024] like Figure 1As shown, a vehicle body bottom detection device includes a column 1, a crossbeam 2, and a lifting device 3. At least two columns 1 are located at both ends of the crossbeam 2, with the crossbeam 2 connected to the top of the column 1. The lifting device 3 is installed below the crossbeam 2 and has a positioning detection device 4. A slide rail 11 is vertically mounted on the column 1, slidably connected to the lifting device 3. An upper limit switch and a lower limit switch are mounted on the slide rail 11. A drive component for moving the lifting device 3 is mounted on either the column 1 or the crossbeam 2. A rangefinder 7 for detecting the vehicle body is also mounted on the bottom surface below the crossbeam 2. The positioning detection device 4, the upper limit switch, the lower limit switch, the rangefinder 7, and the drive component are all electrically connected to an external controller. The two columns 1 are respectively located on both sides of the vehicle conveyor line guide rail, and the crossbeam 2 is fixed to the top of the two columns 1, together forming a gantry structure. A lifting device 3 is installed below the crossbeam 2 to lift the car body. A first drive component is installed on the crossbeam 2 or the column 1 to drive the lifting device 3 vertically. Once the lifting device 3 has lifted the car body to a certain height, workers can walk directly under the car body to visually inspect its underside and confirm the presence of defects. Each of the two columns 1 is equipped with a slide rail 11 that slides to the lifting device 3. The slide rail 11 restricts the movement direction of the lifting device 3, preventing swaying during the lifting process. A distance measuring instrument 7 is installed on the ground below the crossbeam 2. When the car body is not transported to the under-body inspection device, the distance measuring instrument 7 cannot measure any data. Once the car body is transported to the under-body inspection device, the distance measuring instrument 7 can obtain the distance between the car body and the ground, thus confirming that the car body has reached the preset position. Furthermore, since different car bodies have different chassis heights, the different height data measured by the distance measuring instrument 7 can also be used to identify different types of car bodies. After the rangefinder 7 measures the relevant data, it transmits it to the external controller, which is a computer. The computer can automatically control the first drive component to drive the lifting device 3 to move. Workers can also monitor the working status and control the movement of the first drive component through the computer. The slide rail 11 is equipped with upper and lower limit switches to detect the position of the lifting device 3 and prevent it from moving too high or too low. Both upper and lower limit switches are connected to the external control component. The lifting device 3 is also equipped with a positioning detection device 4 to detect whether the vehicle body is properly placed on the vehicle body and whether the lifting device 3 has detached from the vehicle body. The lifting device 3 has space for the vehicle body to move in. In the initial state, the lifting device 3 is lowered, and the vehicle body is located on the conveyor rail. When the conveyor rail transports the car body to the top of the distance measuring instrument 7, the distance measuring instrument 7 measures the distance between the car body and the ground and sends it to the external controller. After the external controller determines that the car body is the preset model, it sends a command to the first drive component. The first drive component drives the lifting device 3 to move upward. When the lifting device 3 detection device on the lifting device 3 sends a signal to the external controller, it indicates that the car body has been completely lifted by the lifting device 3. The external controller continues to control the first drive component to lift the lifting device 3.Once the lifting device 3 triggers the upper limit switch located on the slide rail 11, the upper limit switch sends a signal to the external controller. The external controller then controls the first drive unit to stop the lifting device 3 from moving upwards. At this point, the operator can directly enter under the vehicle body to visually inspect the bottom of the vehicle. After the inspection is completed, the operator leaves under the vehicle body. Then, the external controller controls the first drive unit to lower the lifting device 3. Once the vehicle body is placed back on the conveyor rail, the positioning detection device 4 on the lifting device 3 no longer sends a signal to the external controller. Upon receiving the signal, the external controller can either relay it to the operator or directly to the conveyor rail. The conveyor rail will then output the inspected vehicle body from the bottom inspection device. When the lifting device 3 triggers the lower limit switch, the lower limit switch sends a signal to the external controller. The external controller then controls the first drive unit to stop lowering the lifting device 3, waiting for the next vehicle body to be input into the conveyor rail for inspection.
[0025] like Figure 3 As shown, the positioning detection device 4 includes a support plate 41 and a proximity switch 42 mounted on the lifting device 3. The proximity switch 42 is located below the support plate 41. The support plate 41 is mounted on the lifting device 3 by a spring, and the proximity switch 42 is electrically connected to an external controller. The support plate 41 is used to abut against the bottom of the vehicle body. When the lifting device 3 moves upward, it causes the support plate 41 to move upward until it abuts against the bottom of the vehicle body. The vehicle body presses on the support plate 41, and the weight of the vehicle body is borne by the support plate 41. After receiving the weight, the support plate 41 moves downward to compress the spring until it contacts the proximity switch 42, thereby triggering the proximity switch 42. The proximity switch 42 sends a signal to the external controller. After the inspection of the bottom of the vehicle body is completed, the lifting device 3 lowers the vehicle body. Once the vehicle body is placed on the conveyor rail, it will not continue to move downward, while the lifting device 3 continues to be lowered. Finally, the support plate 41 disengages from the bottom of the vehicle body. After disengagement, the support plate 41 rises under the action of the spring and disengages from the proximity switch 42. The proximity switch 42 then stops sending signals to the external controller.
[0026] like Figure 3 As shown, the support plate 41 has a square frame structure, and the hanger 3 is also equipped with a pad 43, which is aligned with the inner frame of the support plate 41. On one hand, the pad 43 restricts the movement direction of the support plate 41. When the support plate 41 moves downwards, the pad 43 inserts into the inner frame structure of the support plate 41, causing the support plate 41 to move along the height direction of the pad 43. On the other hand, the pad 43 bears the weight load of the vehicle body, preventing the support plate 41 from bearing all the weight, which could cause it to move too far and damage the proximity switch 42.
[0027] like Figure 2As shown, the lifting device 3 includes a top frame 31, vertical rods 32, and horizontal rods 33. The top frame 31 is connected to the drive component. At least four vertical rods 32 are provided, and each vertical rod 32 is fixed at one of the four corners of the top frame 31. An accommodating space is formed between the top frame 31 and each vertical rod 32. One end of the horizontal rod 33 is fixed to the bottom end of the vertical rod 32, and the other end of the horizontal rod 33 extends into the accommodating space. The positioning detection device 4 is fixed to the end of the horizontal rod 33 that extends into the accommodating space. The top frame 31 is used to connect with the drive component and provide a support for the installation of other components. The vertical rods 32 are fixed at the four corners of the top frame 31 to connect the top frame 31 and the horizontal rods 33. An accommodating space is formed between the top frame 31 and each vertical rod 32 to accommodate the vehicle body. The length of the vertical rod 32 is greater than the height of the vehicle body. The distance between the horizontal rod 33 and the top frame 31 is the height of the vertical rod 32. This arrangement provides space between the top frame 31 and the horizontal rod 33 for the vehicle body to be moved in. The crossbar 33 extends under the vehicle body. When the vehicle body moves into the space between the top frame 31 and the crossbar 33, the first drive component drives the top frame 31 to move upward. The top frame 31 drives the vertical bar 32 to move the crossbar 33 upward, so that the crossbar 33 abuts against the bottom of the vehicle body, and then drives the vehicle body to move.
[0028] like Figure 2 As shown, a support rod 34 is also provided between two adjacent vertical rods 32 in the front-to-back direction, and the two ends of the support rod 34 are respectively connected to the vertical rods 32. The support rod 34 is used to fix the distance between two adjacent vertical rods 32 in the front-to-back direction and enhance the structural strength.
[0029] like Figure 2 As shown, a pressure rod 35 is rotatably mounted on the support rod 34. The support rod 34 also has a second driving component for driving the pressure rod 35 to rotate into the accommodating space. The second driving component is electrically connected to an external controller. The vehicle body is located in the accommodating space. The vehicle body typically has door frames. The pressure rod 35 can rotatably extend into the door frame and press against the vehicle chassis, clamping the vehicle body together with the crossbar 33 located at the bottom of the vehicle body to ensure its stability. The pressure rod 35 is driven by the second driving component. When the proximity switch 42 sends a signal to the external controller, the external controller controls the second driving component to drive the pressure rod 35 to rotate in the direction of the vehicle body, causing the pressure rod 35 to press against the vehicle chassis. When the vehicle body separates from the positioning detection device 4, the proximity switch 42 stops sending signals to the external controller, and the external controller controls the second driving component to rotate in the opposite direction, causing the pressure rod 35 to rotate out of the vehicle body.
[0030] Example 2
[0031] This embodiment is similar to Embodiment 1 above, except that, as Figure 1As shown, a mounting platform is provided on the crossbeam 2, and the driving component is a winch 5. The winch 5 includes a rotary motor, a rotating shaft, and a drum. The output end of the rotary motor is connected to the rotating shaft, which is rotatably mounted on the mounting platform. The drum is mounted on the rotating shaft, and a lifting rope is wound around the drum. The lifting rope passes through the mounting platform and is connected to the lifting device. An external controller can control the rotary motor to rotate in different directions, thereby causing the lifting rope on the drum to wind back onto the drum or be released from the drum, thus raising or lowering the lifting device 3.
[0032] A turntable is also installed on the rotating shaft. Multiple protrusions are arranged circumferentially on the outer surface of the turntable, forming a locking space between adjacent protrusions. A telescopic component is also installed on the mounting platform. The telescopic end of the component can extend into the locking space, and it is electrically connected to an external controller. When the lifting device 3 moves upward, triggering the upper limit switch, the upper limit switch sends a signal to the external controller. Upon receiving the signal, the external controller controls the telescopic component to insert into the locking space, thus providing protection. If the rotating motor malfunctions and suddenly stops working, the lifting device 3 will fall under gravity, simultaneously rotating the rotating shaft and turntable. The protrusions on the outer surface of the turntable will abut against the telescopic component in the locking space, locking the turntable and preventing it from rotating. This prevents the rotating shaft from rotating, thus preventing the lifting rope from being lowered from the drum, avoiding further injury to personnel or damage to equipment from the falling lifting device 3. After the inspection is completed, the operator can operate the external controller, which controls the telescopic component to retract and lock the turntable.
[0033] The rotary motor is also equipped with an electromagnetic brake and a load sensor, which is connected to an external controller. The electromagnetic brake can quickly brake in the event of power failure to prevent the spreader 3 from sliding down. The load sensor measures the load on the rotary motor and sends the data to the external controller. The external controller can calculate the weight of the vehicle body on the spreader 3 based on the load data and determine whether it is overloaded. If it is not overloaded, it continues to operate normally; if it is overloaded, the external controller controls the rotary motor to stop working. The standard for determining whether it is overloaded can be input into the external controller by the operator according to the specifications of the rotary motor.
[0034] Example 3
[0035] This embodiment is similar to Embodiment 6 above, except that, as Figure 1As shown, a fall protection device is also provided, which includes a fall protection rack 6 and a fall protection clamp. The fall protection rack 6 is vertically fixed to the column 1, and the fall protection clamp is installed on the lifting device 3. The fall protection clamp can move in the direction of the fall protection rack 6 and engage with the fall protection rack 6. The lifting device 3 is also provided with a third driving component for driving the fall protection clamp to rotate. The third driving component is electrically connected to an external controller. The fall protection clamp is also provided with a second spring to push the fall protection clamp into the fall protection rack 6. Under normal conditions, the anti-fall clip engages with the anti-fall rack 6 under the action of the second spring. When the drive unit drives the lifting device 3 to move vertically, the third drive unit drives the anti-fall clip to rotate and move it out of the anti-fall rack 6 after each movement of one tooth pitch of the anti-fall rack 6. This allows the lifting device 3 to move vertically. Then the third drive unit stops working, and the anti-fall clip re-engages with the anti-fall rack 6 under the action of the second spring. This achieves step-by-step movement of the lifting device 3 during its movement, preventing the lifting device 3 from falling directly and injuring workers or equipment due to rope breakage.
[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A vehicle body underside detection device, characterized in that, The device includes a column (1), a crossbeam (2), and a lifting device (3). There are at least two columns (1), and the tops of the two columns (1) are connected to the two ends of the crossbeam (2). The lifting device (3) is installed below the crossbeam (2). The lifting device (3) is equipped with a positioning detection device (4). A slide rail is provided on the column (1) in the vertical direction. The slide rail is slidably connected to the lifting device (3). An upper limit switch and a lower limit switch are provided on the slide rail. A first driving component is provided on the column (1) or the crossbeam (2) to drive the lifting device (3). A rangefinder (7) for detecting the vehicle body is also provided on the ground below the crossbeam (2). The positioning detection device (4), the upper limit switch, the lower limit switch, the rangefinder (7), and the first driving component are all electrically connected to an external controller.
2. The vehicle body underside detection device according to claim 1, characterized in that, The positioning detection device (4) includes a support plate (41), and a proximity switch (42) is provided on the lifting device (3). The proximity switch (42) is located below the support plate (41). The support plate (41) is installed on the lifting device (3) by a spring. The proximity switch is electrically connected to the external controller.
3. The vehicle body underside detection device according to claim 2, characterized in that, The support plate (41) has a square frame structure, and the lifting device (3) is also provided with a pad (43), which is aligned with the inside of the frame of the support plate (41).
4. The vehicle body underside detection device according to claim 1, characterized in that, The lifting device (3) includes a top frame (31), vertical rods (32) and horizontal rods (33). The top frame (31) is connected to the driving component. There are at least four vertical rods (32), which are fixed at the four corners of the top frame (31). An accommodating space is formed between the top frame (31) and each vertical rod (32). One end of the horizontal rod (33) is fixed to the bottom end of the vertical rod (32), and the other end of the horizontal rod (33) extends into the accommodating space. The positioning detection device (4) is fixed to the end of the horizontal rod (33) that extends into the accommodating space.
5. The vehicle body underside detection device according to claim 4, characterized in that, A support rod (34) is provided between two adjacent vertical rods (32) in the front-back direction, and the two ends of the support rod (34) are respectively connected to the vertical rod (32).
6. The vehicle body underside detection device according to claim 5, characterized in that, A pressure rod (35) is rotatably mounted on the support rod (34), and a second driving member is also provided on the support rod (34) for driving the pressure rod (35) to rotate toward the accommodating space. The second driving member is electrically connected to the external controller.
7. The vehicle body bottom detection device according to claim 1, characterized in that, The crossbeam (2) is provided with an installation platform. The driving component is a winch (5). The winch (5) includes a rotary motor, a rotating shaft and a drum. The output end of the rotary motor is connected to the rotating shaft. The rotating shaft is rotatably installed on the installation platform. The drum is installed on the rotating shaft (52). A lifting rope is wound on the drum. The lifting rope passes through the installation platform and is connected to the lifting device (3).
8. The vehicle body bottom detection device according to claim 7, characterized in that, The rotating shaft is also provided with a turntable, and the outer circumferential surface of the turntable is provided with a plurality of protrusions along the circumferential direction. A locking space is formed between two adjacent protrusions. The mounting platform is also provided with a telescopic component, the telescopic end of which can extend into the locking space. The telescopic component is electrically connected to the external controller.
9. A vehicle body underside detection device according to claim 7, characterized in that, The rotary motor is also equipped with an electromagnetic brake and a load sensor, and the load sensor is connected to the external controller.
10. A vehicle body underside detection device according to claim 1, characterized in that, A fall protection device is also provided, which includes a fall protection rack (6) and a fall protection clip. The fall protection rack (6) is fixed to the column (1) in a vertical direction. The fall protection clip is installed on the lifting device (3). The fall protection clip can move in the direction of the fall protection rack (6) and be inserted into the fall protection rack (6). The lifting device (3) is also provided with a third driving member for driving the fall protection clip to rotate. The third driving member is electrically connected to the external controller. The fall protection clip is also provided with a second spring for pushing the fall protection clip into the fall protection rack (6).