Complete machine testing device for heavy vehicle
By designing a complete testing device for heavy vehicles, and combining vertical and lateral loading testing components, the problem of the inability to fully simulate complex load distribution in existing technologies has been solved. This enables a comprehensive evaluation of chassis performance and accuracy of test results, while ensuring the safety and stability of the testing process.
Patent Information
- Application Number
- CN202423303668.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing heavy vehicle testing equipment only applies load from the top center of the frame, which cannot fully simulate the complex load distribution of the frame in actual use, resulting in incomplete and inaccurate test results.
A complete machine testing device was designed, including a ramp, a frame, a first test component, and a second test component. The first test component evaluates the vertical load-bearing capacity of the frame, the second test component evaluates the lateral performance of the frame, and the guide rail, support frame, limit frame, stop bar, and hydraulic cylinder ensure the stability of the frame during the test.
It enables comprehensive testing of the chassis under vertical and lateral loads, ensuring the accuracy and comprehensiveness of test results. At the same time, it absorbs impact energy through buffer plates and springs to prevent slippage, thereby improving the safety and stability of the test.
Smart Images
Figure CN223664284U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to vehicle engineering and testing technical field, especially relate to a whole machine testing arrangement for heavy vehicle. BACKGROUND
[0002] Heavy vehicle refers to large motor vehicle designed for transporting heavy loads or performing special tasks. They usually have larger body size, higher carrying capacity and powerful power system, suitable for long-distance transportation, construction, mining, fire rescue and other fields. The frame is the basic structure of heavy vehicle, which not only is the skeleton of the whole vehicle, but also bears the key components such as engine, transmission system, suspension system and braking system. After the production is completed, the frame must be strictly tested and verified. The main purpose of the test is to simulate the maximum load that the vehicle may encounter in actual use, to evaluate the carrying capacity and deformation resistance of the frame.
[0003] Ordinary testing device usually only loads from a fixed point of the frame, such as from the middle area of the top end of the frame, although this method can evaluate the vertical carrying capacity of the frame, but its single direction loading method ignores the stress condition of the side of the frame, and cannot simulate the complex load distribution that the frame may encounter in actual use, resulting in that the test result is not comprehensive and accurate.
[0004] Therefore, it is particularly needed to provide a whole machine testing arrangement for heavy vehicle to solve the above problems. CONTENT OF THE UTILITY MODEL
[0005] In order to overcome the shortcomings of ordinary testing device that only loads from the middle of the top end of the frame, although it can evaluate the vertical carrying capacity, but it ignores the stress of the side, cannot fully simulate the actual complex load distribution, resulting in that the test result is not comprehensive and accurate, the utility model provides a whole machine testing arrangement for heavy vehicle.
[0006] The utility model realizes through the following technical ways: a whole machine testing arrangement for heavy vehicle, including slope, frame, first test component, second test component and control cabinet, the frame is the basic frame of the whole device, two slopes are distributed in front and back, and are fixed to the lower part of the frame, the slope is inclined from the outer end downward to the inner end upward, forming a slope of low outside and high inside, and the highest part of the slope is flush with the parking surface of the frame, the first test component is arranged on the frame, the second test component is arranged on the first test component, and the control cabinet is installed on the right side of the lower part of the frame.
[0007] As preferred, the first testing assembly comprises a driving motor, a pinion, a gear wheel, a gear shaft, a first bevel gear, a second bevel gear, a third bevel gear, a synchronous shaft, a lead screw, a sliding block, a servo motor, a mounting plate, a pressing plate and a first pressure sensor, the driving motor is electrically connected with the control panel, is mounted at the right lower part of the frame, and has an output shaft connected with the frame at left; the pinion is fixed to the output shaft of the driving motor; the gear shaft is rotatably connected to the right lower part of the frame; the gear wheel is fixed to the right end of the gear shaft and is located behind the pinion and engaged with the pinion; the first bevel gear is fixed to the left end of the gear shaft; the two lead screws are distributed left and right, are rotatably connected to the inside of the frame, and each second bevel gear is fixed to the bottom end of each lead screw; the synchronous shaft is rotatably connected to the middle of the inside of the frame; the two third bevel gears are distributed left and right, are fixed to the end of the synchronous shaft, and are engaged with the adjacent third bevel gear; the engagement angle between the second bevel gear and the adjacent third bevel gear is 90 degrees; the two sliding blocks are distributed left and right, are slidably connected to the inside of the frame, and are threadedly connected with the corresponding lead screw; each servo motor is electrically connected with the control panel, is mounted on each sliding block, and has an output shaft facing inward; the mounting plate is fixed between the output shafts of the two servo motors; the pressing plate of a four-axis structure is mounted on the mounting plate; and the plurality of first pressure sensors are distributed in three rows and five columns, are fixed to the bottom end of the pressing plate, and are electrically connected with the control panel.
[0008] As preferred, the second testing assembly comprises a mounting seat, a speed reducer, a pressing block and a second pressure sensor, two mounting seats are symmetrically distributed and fixed to the top end of the mounting plate, each speed reducer electrically connected with the control panel is mounted on the upper front side of each mounting seat, and has an output shaft facing backward, the pressing block is rotatably connected to the upper part of the mounting seat and is fixedly connected with the output shaft of the speed reducer, and the plurality of second pressure sensors are distributed in a cross shape, are fixed to the top end of the pressing block, and are electrically connected with the control panel.
[0009] As preferred, the second testing assembly comprises a mounting seat, a speed reducer, a pressing block and a second pressure sensor, two mounting seats are symmetrically distributed and fixed to the top end of the mounting plate, each speed reducer electrically connected with the control panel is mounted on the upper front side of each mounting seat, and has an output shaft facing backward, the pressing block is rotatably connected to the upper part of the mounting seat and is fixedly connected with the output shaft of the speed reducer, and the plurality of second pressure sensors are distributed in a cross shape, are fixed to the top end of the pressing block, and are electrically connected with the control panel.
[0010] As preferred, it further comprises buffer plates, springs and guide rods, every three guide rods are linearly distributed at equal intervals, are slidingly connected to every stopper rod, and are provided with circular protrusions at outer ends, the diameter of the circular protrusions is larger than that of the guide rod bodies, every buffer plate is fixedly connected between inner ends of every three guide rods, and has a height consistent with that of the stopper rod, and every spring is sleeved on the outside of every guide rod and is fixedly connected to the stopper rod and the buffer plate at two ends.
[0011] As preferred, it further comprises hand wheels, every hand wheel is rotationally connected to the upper part of every support frame, one end of the hand wheel is located outside the support frame, and the other end extends into the support frame and is fixedly connected to the right end of the corresponding stopper rod.
[0012] As preferred, it further comprises guide plates, four guide plates are symmetrically distributed and are fixedly connected to the rack, every two guide plates longitudinally aligned form a group, and every sliding block slides on every group of guide plates.
[0013] As preferred, it further comprises spacer plates, three spacer plates of different sizes are distributed in an up-down manner, one spacer plate of a large size is fixedly connected between the bottom ends of all the first pressure sensors, and two spacer plates of a small size are fixedly connected between the top ends of every four second pressure sensors.
[0014] As preferred, the outside of the guide rod is provided with a damping ring.
[0015] As preferred, the driving motor, the servo motor and the speed reducer are self-locking motors.
[0016] It can be known from the above description of the structure of the utility model that the starting point, concept and advantages of the design of the utility model are:
[0017] Through the design of the first test assembly, vertical loading test of the frame can be realized, the carrying capacity of the frame in the vertical direction is evaluated, and through the design of the second test assembly, loading test of the side of the frame is realized, the performance of the frame under lateral load is evaluated, compared with ordinary test devices, the whole machine test device can more comprehensively simulate the complex load distribution that the frame may encounter in actual use, and the test result is ensured to be comprehensive and accurate.
[0018] Through the joint action of the guide rail, the support frame, the limiting frame, the stopper rod and the hydraulic cylinder, it is ensured that the frame always remains stable during the test process, the occurrence of the phenomenon of vehicle sliding is prevented, and the use of the hydraulic cylinder enables the support frame to be flexibly moved and adapt to the needs of different vehicle models.
[0019] Through the design of the buffer plate, the spring and the guide rod, the impact energy generated when the frame slides can be effectively absorbed, the frame is prevented from directly impacting the stopper rod, and the safety of the device and the vehicle is protected. DRAWINGS
[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.
[0021] Figure 2 This is a partial sectional view of the frame component of this utility model.
[0022] Figure 3 This is a three-dimensional structural diagram of the slider, servo motor, and mounting plate of this utility model.
[0023] Figure 4 This is a three-dimensional structural diagram of the support frame, limiting frame, and stop bar components of this utility model.
[0024] Figure 5 This is a three-dimensional structural diagram of the components of this utility model, such as the stop lever, handwheel, and hydraulic cylinder.
[0025] Figure 6 This is a three-dimensional structural diagram of the buffer plate, spring, and guide rod of this utility model.
[0026] Explanation of reference numerals in the attached drawings: 1. Inclined beam; 2. Frame; 3. Drive motor; 4. Pinion; 5. Gear; 6. Gear shaft; 7. First bevel gear; 71. Second bevel gear; 72. Third bevel gear; 8. Synchronous shaft; 9. Lead screw; 10. Slider; 101. Servo motor; 11. Guide plate; 12. Mounting plate; 13. Pressure plate; 131. First pressure sensor; 14. Pad; 15. Mounting base; 16. Gear motor; 17. Pressure block; 171. Second pressure sensor; 18. Guide rail; 19. Support frame; 191. Limiting frame; 20. Stop bar; 201. Handwheel; 21. Hydraulic cylinder; 22. Buffer plate; 23. Spring; 24. Guide rod; 25. Control console. Detailed Implementation
[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0028] Example: A whole-machine testing device for heavy vehicles, such as... Figures 1-5 As shown, the device includes ramp 1, frame 2, first test component, second test component, and control console 25. Frame 2 serves as the basic framework of the entire device. Two ramps 1 are distributed front and rear and connected to the lower part of frame 2 by welding. The ramp surface slopes downward from the outer end to upward from the inner end, forming a slope that is lower on the outside and higher on the inside. The highest point of ramp 1 is flush with the parking surface of frame 2, ensuring that the vehicle frame smoothly transitions from ramp 1 to the parking surface of frame 2. Both the ramp surface of ramp 1 and the parking surface of frame 2 have anti-slip grooves, which can increase the friction between the wheels of the vehicle frame and the ramp surface and parking surface, preventing the vehicle from slipping or rolling. The first test component is set on frame 2, and the second test component is set on the first test component. Control console 25 is connected to the lower right side of frame 2 by bolts and is responsible for managing and coordinating the entire testing process.
[0029] As Figures 1-3 shown, the first test assembly comprises a drive motor 3, a pinion 4, a gear wheel 5, a gear shaft 6, a first bevel gear 7, a second bevel gear 71, a third bevel gear 72, a synchronous shaft 8, a lead screw 9, a sliding block 10, a servo motor 101, a guide plate 11, a mounting plate 12, a pressing plate 13 and a first pressure sensor 131, the drive motor 3 electrically connected with the control panel 25 is connected to the lower right side of the rack 2 by bolts, the output shaft thereof is connected to rotate with the rack 2 to the left to improve the stability when the output shaft rotates, the pinion 4 is connected to the output shaft of the drive motor 3 by key connection, the gear shaft 6 is rotatably connected to the lower right side of the rack 2, the gear wheel 5 is connected to the right end of the gear shaft 6 by key connection and is located behind the pinion 4 to engage with the pinion 4, and the thickness of the gear wheel 5 is equal to that of the pinion 4, so that uniform load distribution can be achieved, the risk of wear and damage is reduced, vibration caused by unbalanced load is reduced, and operation stability is improved, the first bevel gear 7 is connected to the left end of the gear shaft 6 by key connection, two lead screws 9 are distributed left and right and are rotatably connected to the inside of the rack 2, each second bevel gear 71 is connected to the bottom end of each lead screw 9 by key connection, the synchronous shaft 8 is rotatably connected to the middle position of the lower part inside the rack 2, two third bevel gears 72 are distributed left and right and are connected to the end portions of the synchronous shaft 8 by key connection and engage with the adjacent third bevel gears 72, and the engagement angle between the second bevel gear 71 and the adjacent third bevel gear 72 is 90 degrees, so that power can be transmitted from the vertical shaft to the horizontal shaft to change the rotation direction, two sliding blocks 10 are distributed left and right and are slidably connected to the inside of the rack 2 and are threadedly connected with the corresponding lead screws 9, when the drive motor 3 operates, the engagement relationship between the pinion 4, the gear wheel 5, the first bevel gear 7, the second bevel gear 71 and the third bevel gear 72 ensures efficient transmission of power and changes the rotation direction, so that the two lead screws 9 can rotate synchronously to drive the movement of the sliding blocks 10 and the mounting plate 12, four guide plates 11 are symmetrically distributed and are connected to the rack 2 by welding, every two guide plates 11 aligned longitudinally form a group, each sliding block 10 slides on each group of guide plates 11, each servo motor 101 electrically connected with the control panel 25 is connected to each sliding block 10 by bolts, the output shaft thereof faces inward, the mounting plate 12 is connected between the output shafts of the two servo motors 101 by key connection, the servo motor 101 can accurately adjust the angle of the mounting plate 12, the pressing plate 13 of the four-axis structure is connected to the mounting plate 12 by bolts, fifteen first pressure sensors 131 are distributed in three rows and five columns with intervals, are connected to the bottom end of the pressing plate 13 by adhesion and are electrically connected with the control panel 25, when the pressing plate 13 contacts the vehicle frame, the first pressure sensor 131 can measure the deformation of the vehicle frame.
[0030] As Figure 1 and Figure 3As shown, the second test assembly comprises a mounting seat 15, a reduction motor 16, a pressing block 17 and a second pressure sensor 171. Two mounting seats 15 are symmetrically distributed and connected to the top end of the mounting plate 12 by welding. Each reduction motor 16 electrically connected to the control cabinet 25 is connected to the upper front side of each mounting seat 15 by bolts, with the output shaft facing backward. The pressing block 17 is rotatably connected to the upper part of the mounting seat 15 and fixedly connected to the output shaft of the reduction motor 16. Four second pressure sensors 171 are cross-shapedly distributed and connected to the top end of the pressing block 17 by adhesion, and electrically connected to the control cabinet 25. When the pressing block 17 contacts the vehicle frame, the second pressure sensor 171 can measure the deformation of the vehicle frame.
[0031] As shown in Figure 1 and Figures 4-6 It also comprises a guide rail 18, a support frame 19, a limiting frame 191, a stop rod 20, a hand wheel 201 and a hydraulic cylinder 21. Four guide rails 18 are symmetrically distributed on the four corners of the lower part of the rack 2 by welding. Two support frames 19 are distributed in front of and behind the two guide rails 18 on the right side and are slidably connected to the two guide rails 18. Two limiting frames 191 are distributed in front of and behind the two guide rails 18 on the left side and are slidably connected to the two guide rails 18, ensuring the movement accuracy, stability and carrying capacity of the support frame 19 and the limiting frame 191. The end of each guide rail 18 not connected to the rack 2 is provided with a square protrusion, and the vertical cross-sectional area of the square protrusion is larger than that of the main body of the guide rail 18, preventing the support frame 19 and the limiting frame 191 from being separated from the corresponding guide rail 18. Two hydraulic cylinders 21 electrically connected to the control cabinet 25 are distributed in front of and behind the lower left part of the rack 2 and are connected to the lower left part of the rack 2 by bolts. The extension rod of the front hydraulic cylinder 21 faces forward and is fixedly connected to the front limiting frame 191. The extension rod of the rear hydraulic cylinder 21 faces backward and is fixedly connected to the rear limiting frame 191. Each stop rod 20 is rotatably connected to the upper part of each support frame 19, with its left end clamped to the corresponding limiting frame 191. The right end of the stop rod 20 is roughened or made of a material with high friction coefficient to increase the frictional resistance between the stop rod 20 and the support frame 19, ensuring stable connection between the two and preventing accidental rotation of the stop rod 20. Each hand wheel 201 is rotatably connected to the upper part of each support frame 19, with one end located outside the support frame 19 and the other end extending into the support frame 19 and fixedly connected to the right end of the corresponding stop rod 20, facilitating rotation of the stop rod 20 by holding the hand wheel 201.
[0032] As shown in Figure 6As shown, it also includes buffer plate 22, spring 23 and guide rod 24, every three guide rods 24 are linearly distributed at equal intervals and are slidingly connected to each block 20, the outer end of each guide rod 24 is provided with a circular protrusion, the diameter of the circular protrusion is larger than the diameter of the main body of the guide rod 24, so that the guide rod 24 is limited on the block 20, preventing the guide rod 24 from being separated from the block 20, and the outer end of the guide rod 24 is provided with a damping ring, so that the guide rod 24 can effectively absorb and disperse impact energy during movement, reducing vibration and noise, each buffer plate 22 is connected between the inner ends of every three guide rods 24 by welding, the height of the buffer plate 22 is consistent with the height of the block 20, which can provide stable support and absorb impact energy, and each spring 23 is sleeved on the outer end of each guide rod 24, and the two ends of the spring 23 are fixedly connected with the block 20 and the buffer plate 22 respectively.
[0033] As shown in Figures 1-3 As shown, it also includes buffer plate 22, spring 23 and guide rod 24, every three guide rods 24 are linearly distributed at equal intervals and are slidingly connected to each block 20, the outer end of each guide rod 24 is provided with a circular protrusion, the diameter of the circular protrusion is larger than the diameter of the main body of the guide rod 24, so that the guide rod 24 is limited on the block 20, preventing the guide rod 24 from being separated from the block 20, and the outer end of the guide rod 24 is provided with a damping ring, so that the guide rod 24 can effectively absorb and disperse impact energy during movement, reducing vibration and noise, each buffer plate 22 is connected between the inner ends of every three guide rods 24 by welding, the height of the buffer plate 22 is consistent with the height of the block 20, which can provide stable support and absorb impact energy, and each spring 23 is sleeved on the outer end of each guide rod 24, and the two ends of the spring 23 are fixedly connected with the block 20 and the buffer plate 22 respectively.
[0034] As shown in Figures 1-3 As shown, the driving motor 3, the servo motor 101 and the reduction motor 16 are all self-locking motors with self-locking function, which can automatically lock the output shaft through mechanical structure or electromagnetic principle when stopping running, preventing the output shaft from rotating freely under external force, not only improving the safety of the system, but also ensuring the stability of the test process.
[0035] When the vehicle frame needs to be opened from the front slope 1 or the rear slope 1 to the parking surface of the rack 2, first, the operator holds the corresponding hand wheel 201 with his hand, rotates the stop lever 20 clockwise to 90 degrees or 180 degrees, so that the left end of the stop lever 20 is out of the limiting frame 191, and then the vehicle frame is opened from the front slope 1 or the rear slope 1 to the parking surface of the rack 2, and then the stop lever 20 is rotated counterclockwise to 90 degrees or 180 degrees, so that the left end of the stop lever 20 is re-inserted into the limiting frame 191, and then the hydraulic cylinder 21 is started through the control console 25 to control the retraction of the telescopic rod, and the limiting frame 191 is moved inward, and the stop lever 20 is moved inward with the limiting frame 191, until the stop lever 20 contacts the vehicle frame and limits the vehicle frame on the parking surface of the rack 2, and then the hydraulic cylinder 21 is closed, and then the drive motor 3 is started, and the output shaft drives the pinion 4 to rotate clockwise, and the pinion 4 is engaged with the gear 5, and the gear 5 drives the gear shaft 6 to rotate counterclockwise, and the gear shaft 6 drives the first bevel gear 7 to rotate counterclockwise, and the first bevel gear 7 is engaged with the right second bevel gear 71, and the right second bevel gear 71 drives the right lead screw 9 to rotate clockwise, and the right second bevel gear 71 is engaged with the right third bevel gear 72, and the right third bevel gear 72 drives the left third bevel gear 72 to rotate counterclockwise through the synchronous shaft 8, and the left third bevel gear 72 is engaged with the left second bevel gear 71, and the left second bevel gear 71 drives the left lead screw 9 to rotate clockwise, so that the left and right lead screws 9 rotate clockwise synchronously, and the two sliders 10 drive the mounting plate 12 to descend, and the pressing plate 13 gradually approaches and presses the vehicle frame to apply a vertical load to the vehicle frame for the first test. During the test, the first pressure sensor 131 is stressed and measures the deformation of the vehicle frame, and transmits the data to the control console 25 for the operator to check. After the first test is completed, the output shaft of the drive motor 3 is counterclockwise, so that the left and right lead screws 9 rotate counterclockwise synchronously, and the two sliders 10 drive the mounting plate 12 to rise and reset, and the drive motor 3 is temporarily closed. Then the servo motor 101 is started, and the output shaft is controlled to rotate clockwise by 180 degrees, and the mounting plate 12 rotates clockwise by 180 degrees with the output shaft of the servo motor 101, and the position of the pressing plate 13 and the pressing block 17 is adjusted. Close the servo motor 101, then start the reduction motor 16, control the output shaft to rotate clockwise or counterclockwise to the appropriate angle, adjust the pressing block 17 to the appropriate angle, and align the side of the vehicle frame. Close the reduction motor 16, and then restart the drive motor 3 to control the output shaft to rotate clockwise, so that the left and right lead screws 9 rotate clockwise synchronously, and the two sliders drive the mounting plate 12 to descend again, so that the pressing block 17 approaches and presses the side of the vehicle frame to apply a lateral load to the vehicle frame for the second test. During the test, the second pressure sensor 171 is stressed and measures the deformation of the vehicle frame, and transmits the data to the control console 25 for the operator to check. After the second test is completed, repeat the above steps to make the mounting plate 12 rise and reset, and then start the servo motor 101 again to control the output shaft to rotate counterclockwise by 180 degrees,The mounting plate 12 rotates 180 degrees counterclockwise with the output shaft of the servo motor 101, and the pressing plate 13 and the pressing block 17 are restored to the initial position again, the deceleration motor 16 is started again, the output shaft of the deceleration motor 16 is controlled to rotate counterclockwise or clockwise to the appropriate angle, the pressing block 17 is adjusted to the appropriate angle and restored to the original position, and finally the vehicle frame is opened from the parking surface of the rack 2.
[0036] During the test, once the vehicle frame slides, the two blocking rods 20 immediately block the forward or backward movement of the vehicle frame to prevent it from continuing to move, ensuring the safety and stability of the test process, and at the same time, the buffer plate 22 is extruded outward by the vehicle frame, and the spring 23 is compressed, absorbing impact energy and preventing the vehicle frame from directly impacting the blocking rod 20.
[0037] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.
Claims
1. An overall test device for heavy-duty vehicles, characterized in that, The device comprises a slope (1), a rack (2), a first test assembly, a second test assembly and a control console (25), the rack (2) is the base frame of the whole device, two slopes (1) are distributed in front and back, fixedly connected to the lower part of the rack (2), the slope is inclined from the outer end downward to the inner end upward, forming a slope of low outside and high inside, and the highest part of the slope (1) is flush with the parking surface of the rack (2), the first test assembly is arranged on the rack (2), the second test assembly is arranged on the first test assembly, and the control console (25) is installed on the right side of the lower part of the rack (2).
2. The overall test device for a heavy-duty vehicle according to claim 1, characterized by, The first test assembly comprises a driving motor (3), a pinion (4), a gear wheel (5), a gear shaft (6), a first bevel gear (7), a second bevel gear (71), a third bevel gear (72), a synchronous shaft (8), a lead screw (9), a sliding block (10), a servo motor (101), a mounting plate (12), a pressing plate (13) and a first pressure sensor (131), the driving motor (3) electrically connected with the control console (25) is installed on the right side of the lower part of the rack (2), the output shaft thereof is connected with the rack (2) for rotation, the pinion (4) is fixedly connected to the output shaft of the driving motor (3), the gear shaft (6) is rotatably connected to the right side of the lower part of the rack (2), the gear wheel (5) is fixedly connected to the right end of the gear shaft (6) and is located behind the pinion (4) and engaged with the pinion (4), the first bevel gear (7) is fixedly connected to the left end of the gear shaft (6), two lead screws (9) are distributed left and right and are rotatably connected to the inside of the rack (2), each second bevel gear (71) is fixedly connected to the bottom end of each lead screw (9), the synchronous shaft (8) is rotatably connected to the middle position of the lower part of the inside of the rack (2), two third bevel gears (72) are distributed left and right, fixedly connected to the end portions of the synchronous shaft (8) and engaged with the adjacent third bevel gears (72), and the engagement angle between the second bevel gear (71) and the adjacent third bevel gear (72) is 90 degrees, two sliding blocks (10) are distributed left and right, slidably connected to the inside of the rack (2) and threadedly connected with the corresponding lead screws (9), each servo motor (101) electrically connected with the control console (25) is installed on each sliding block (10), the output shaft thereof faces inward, the mounting plate (12) is fixedly connected between the output shafts of the two servo motors (101), the pressing plate (13) of the four-axis structure is installed on the mounting plate (12), a plurality of first pressure sensors (131) are distributed in three rows and five columns at intervals, fixedly connected to the bottom end of the pressing plate (13) and electrically connected with the control console (25).
3. The complete machine testing device for heavy-duty vehicles according to claim 2, characterized in that, The second test assembly comprises a mounting seat (15), a speed reducer (16), a pressing block (17) and a second pressure sensor (171), two mounting seats (15) are symmetrically distributed, fixedly connected to the top end of the mounting plate (12), each speed reducer (16) electrically connected with the control console (25) is installed on the upper front side of each mounting seat (15), the output shaft thereof faces backward, the pressing block (17) is rotatably connected to the upper part of the mounting seat (15) and fixedly connected with the output shaft of the speed reducer (16), a plurality of second pressure sensors (171) are distributed in a cross shape, fixedly connected to the top end of the pressing block (17) and electrically connected with the control console (25).
4. The overall test device for a heavy-duty vehicle according to claim 3, characterized by It further comprises guide rails (18), support frames (19), limiting frames (191), blocking rods (20) and hydraulic cylinders (21), four guide rails (18) are symmetrically arranged front and back, fixedly connected to four corners of the lower part of the frame (2), two support frames (19) are distributed front and back, slidingly connected to the two guide rails (18) on the right side, two limiting frames (191) are distributed front and back, slidingly connected to the two guide rails (18) on the left side, and a square protrusion is arranged at the end of each guide rail (18) not connected to the frame (2), the vertical sectional area of the square protrusion is larger than that of the main body of the guide rail (18), two hydraulic cylinders (21) electrically connected to the console (25) are distributed front and back, mounted on the lower left side of the frame (2), wherein the telescopic rod of the front hydraulic cylinder (21) faces forward and is fixedly connected to the front limiting frame (191), the telescopic rod of the rear hydraulic cylinder (21) faces backward and is fixedly connected to the rear limiting frame (191), and each blocking rod (20) is rotatably connected to the upper part of each support frame (19), and the left end of the blocking rod (20) is clamped with the corresponding limiting frame (191).
5. The complete machine testing device for heavy-duty vehicles according to claim 4, characterized in that, It further comprises buffer plates (22), springs (23) and guide rods (24), every three guide rods (24) are distributed in a straight line at equal intervals, slidingly connected to each blocking rod (20), and a circular protrusion is arranged at the outer end of each guide rod (24), the diameter of the circular protrusion is larger than that of the main body of the guide rod (24), each buffer plate (22) is fixedly connected between the inner ends of every three guide rods (24), and the height of each buffer plate (22) is consistent with that of the blocking rod (20), and each spring (23) is sleeved on the outside of each guide rod (24), and the two ends of the spring (23) are fixedly connected with the blocking rod (20) and the buffer plate (22) respectively.
6. The complete machine testing device for heavy-duty vehicles according to claim 5, characterized in that, It further comprises hand wheels (201), each hand wheel (201) is rotatably connected to the upper part of each support frame (19), one end of the hand wheel (201) is located outside the support frame (19), and the other end extends into the support frame (19) and is fixedly connected with the right end of the corresponding blocking rod (20).
7. The complete machine testing device for heavy-duty vehicles according to claim 6, characterized in that, It further comprises guide plates (11), four guide plates (11) are symmetrically distributed, fixedly connected to the frame (2), every two guide plates (11) vertically aligned form a group, and each sliding block (10) slides on each group of guide plates (11).
8. The complete machine testing device for heavy-duty vehicles according to claim 7, characterized in that, It further comprises spacers (14), three spacers (14) of different sizes are distributed in a vertical manner, wherein one spacer (14) with a large size is fixedly connected between the bottom ends of all the first pressure sensors (131), and two spacers (14) with small sizes are fixedly connected between the top ends of every four second pressure sensors (171).
9. The complete machine testing device for heavy-duty vehicles according to claim 8, characterized in that, A damping ring is arranged outside the guide rod (24).
10. The complete machine testing device for heavy-duty vehicles according to claim 9, characterized in that, The driving motor (3), the servo motor (101) and the speed reducer (16) are all self-locking motors.