Truck front wheel lateral slip detection device

Abstract

The present invention relates to a device for detecting the lateral side slip of the front wheel of a truck. The device comprises a support frame and a controller. There are two crossbeams in the support frame. There are release platforms and side slip platforms between the two crossbeams and the adjacent short frames. There is a connecting rod mechanism between the two crossbeams. The connecting rod mechanism is hinged by a middle connecting rod and two outer connecting rods. The non-hinged ends of the outer connecting rods are connected to the corresponding side slip platforms. A crossbeam has a through hole, and a first touch rod is arranged in the through hole. One end of the first touch rod is connected to the adjacent side slip platform, and the other end has a first sensor. The device is characterized in that: there is a middle slip platform between the two crossbeams. A second sensor is arranged on one side of the first sensor, and a second touch rod is arranged between the second sensor and the crossbeam. One end of the second touch rod is connected to the adjacent crossbeam, and the other end is abutted against the second sensor. The first and second sensors are both connected to the controller. The present invention is suitable for detecting the side slip of the front wheels of trucks with single front axles and double front axles, and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to a truck front wheel side slip deviation detection device. Specifically, it is a device used to detect the lateral side slip of the wheels at both ends of the front axle of the truck. It is especially suitable for detecting the lateral side slip of the front wheels of large-tonnage trucks. Background Art

[0002] It is well known in the truck manufacturing industry that before a truck leaves the factory, the lateral slip deviation of the wheels at both ends of the truck's front axle is adjusted to the minimum by adjusting the tie rod to avoid unilateral wear of the front wheels and increased fuel consumption during driving. However, since the tie rod that controls the direction and the wheel hubs at both ends of the truck's front axle are matched with ball heads and bearings, the gap between the ball heads and bearings will increase as the ball heads and bearings wear over time. Once the gap between the ball heads and bearings increases, the lateral slip of the front wheels that play a steering role will increase, resulting in unilateral wear of the front wheels of the truck and increased fuel consumption. To this end, it is necessary to regularly test the lateral slip of the wheels at both ends of the truck's front axle, and adjust the gap between the ball heads and bearings based on the test results to eliminate unilateral wear and increased fuel consumption of the front wheels of the truck.

[0003] At present, the devices used to measure the lateral side slip of the wheels at both ends of the front axle of a truck are all traditional measuring devices. This traditional measuring device contains a support frame and a controller. The support frame is rectangular and has two crossbeams inside. There are release platforms and side slip platforms that can slide left and right between the two crossbeams and the short frames of the adjacent support frames. The two side slip platforms are rectangular plates of the same size and corresponding to each other on the left and right, and the two release platforms are rectangular plates of the same size and corresponding to each other on the left and right. The sum of the width of the release platform and the same-direction width of the side slip platform is equal to the spacing between the two long frames of the support frame. There is a gap between the release platform and the side slip platform and the adjacent crossbeams and the short frames of the support frame. A bottom plate is provided between the two crossbeams, and a connecting rod mechanism is provided on the bottom plate. The connecting rod mechanism is formed by hingedly connecting a middle connecting rod and two outer connecting rods perpendicular to the middle connecting rod. The longitudinal middle of the middle connecting rod is hinged to the center of the bottom plate by means of a pin. The non-hinged ends of the outer connecting rods are connected to the corresponding side slip platforms after passing through the adjacent crossbeams. A through hole is processed on one of the crossbeams, and a first contact rod that is movably matched with it is provided in the through hole. The first touch rod is parallel to the longitudinal direction of the support frame, one end of which is connected to the adjacent side slide, and the other end of which is provided with a first sensor, which abuts against the adjacent end of the first touch rod. A first photoelectric switch and a second photoelectric switch are provided outside one end of the support frame, the adjacent sides of the release platform and the side slide correspond to the first photoelectric switch, and the side of the side slide away from the release platform corresponds to the second photoelectric switch. The first sensor, the first photoelectric switch and the second photoelectric switch are all connected to the controller by wires.

[0004] During the test, the wheels at both ends of the front axle of the truck are first driven to two release platforms at the same time, and the two release platforms release the control torque acting on the two front wheels. Then, the two front wheels are driven to two side sliding platforms. When the front wheels enter the side sliding platform, the side sliding deviation of the two front wheels will drive the two side sliding platforms to move inward or outward at the same time. The movement amount is received by the first sensor and converted into an electrical signal and sent to the controller. After being calculated by the computer in the controller, it is finally displayed on the display in the controller.

[0005] Although the above-mentioned measuring device can detect the sideslip of the two wheels at both ends of a single front axle, since it is mainly composed of two release platforms, two sideslip platforms and a connecting rod mechanism, it cannot detect the sideslip of the four front wheels that perform steering functions at both ends of a double front axle, which limits its scope of application. Summary of the invention

[0006] The problem to be solved by the present invention is to provide a truck front wheel lateral sideslip detection device. The detection device can detect the sideslip of two wheels at both ends of a single front axle, and can also detect the sideslip of four front wheels at both ends of a double front axle, and the application scope is not limited.

[0007] The above-mentioned problem to be solved by the present invention is achieved by the following technical solutions:

[0008] The lateral sideslip detection device of the front wheel of a truck of the present invention comprises a support frame and a controller. The support frame is rectangular and has two crossbeams therein. There are release platforms and side-slip platforms that can slide left and right between the two crossbeams and the short frames of the adjacent support frames. The two side-slip platforms are rectangular plates of the same size and corresponding left and right, and the two release platforms are rectangular plates of the same size and corresponding left and right. The sum of the width of the release platform and the same-direction width of the side-slip platform is equal to the spacing between the two long frames of the support frame. There are gaps between the release platform and the side-slip platform and the adjacent crossbeams and the short frames of the support frame.

[0009] There is a connecting rod mechanism between the two cross beams. The connecting rod mechanism is formed by hingedly connecting a middle connecting rod and two outer connecting rods perpendicular thereto. The non-hinged ends of the outer connecting rods pass through the adjacent cross beams and are respectively connected to the corresponding side sliding platforms.

[0010] One of the crossbeams has a through hole, in which a first touch rod is movably matched. The first touch rod is parallel to the longitudinal direction of the support frame, one end of which is connected to the adjacent side slide, and the other end of which has a first sensor, which abuts against the adjacent end of the first touch rod.

[0011] A release platform and the adjacent side sliding platform have first photoelectric switches at both ends, and the side sliding platform away from the release platform has second photoelectric switches. The first sensor, the first photoelectric switch and the second photoelectric switch are all connected to the controller via wires.

[0012] Its characteristics are: there is a middle slide between the two beams. The middle slide is rectangular, its long side is parallel to the long side of the support frame, its length is less than the distance between the two beams, and there is a middle pin in the center. The two ends of the middle pin extend out of the upper and lower surfaces of the middle slide respectively. The middle of the middle connecting rod is hinged to the upper end of the middle pin.

[0013] There are two guide rods under the middle slide table. The guide rods are parallel to each other and to the middle slide table in the longitudinal direction. Both ends of the guide rods are connected to corresponding cross beams respectively. The middle slide table and the guide rods are in sliding cooperation in the longitudinal direction.

[0014] The first sensor is fixed on the middle slide. A second sensor is provided on one side of the first sensor and the two are parallel to each other, and a second touch rod is provided between the second sensor and the cross beam. One end of the second touch rod is connected to the adjacent cross beam, and the other end is against the second sensor. The second sensor is connected to the controller by means of a wire.

[0015] A further improvement of the present invention is that a bottom plate is provided between the cross beam and the short side frames at both ends of the adjacent support frame, and a first roller mechanism and a first limit mechanism are provided at both ends of the bottom plate corresponding to the release platform. The first roller mechanism is composed of a first wheel seat and a first load-bearing roller horizontally mounted on the first wheel seat. The first limit mechanism contains a second wheel seat, and the second wheel seat has two mutually parallel vertical axes, and both vertical axes have rotatable first guide rollers, and a first gap is provided between the first guide rollers on the two vertical axes. The first guide strips are connected to the bottom of both ends of the release platform corresponding to the first gap, and the first guide strips are located in the first gap and are movably matched with the first guide rollers.

[0016] A further improvement of the present invention is that a second limiting mechanism is provided in the longitudinal middle of the bottom plate corresponding to the side sliding platform; the second limiting mechanism corresponds to the longitudinal center of the side sliding platform, and a second load-bearing roller mechanism is provided on both lateral sides thereof. The second limiting mechanism contains a third wheel seat, and the third wheel seat has two mutually parallel vertical axes, and both vertical axes have rotatable second guide rollers, and a second gap is provided between the second guide rollers on the two vertical axes. Second guide strips are connected to the bottom of both longitudinal sides of the side sliding platform corresponding to the second gap, and the second guide strips are located in the second gap and are movably matched with the second guide rollers. The second load-bearing roller mechanism consists of a fourth wheel seat and a second load-bearing roller horizontally mounted on the fourth wheel seat.

[0017] A further improvement of the present invention is that a rod hole is provided on the cross beam corresponding to the inner end of the release platform, and a spring rod is fixed in the rod hole. Both ends of the spring rod extend outside the two sides of the cross beam. The inner end of the spring rod abuts against the release platform. An inner spring is provided on the section of the spring rod between the release platform and the adjacent cross beam, a nut is provided on the outer end of the spring rod, and an outer spring is provided on the section of the spring rod between the nut and the cross beam.

[0018] A further improved solution of the present invention is that the adjacent side surface of the cross beam is provided with a connecting block, and both ends of the guide rod are respectively connected to the corresponding connecting blocks.

[0019] A further improvement of the present invention is that a first reset rod is provided between the middle slide and the guide rod. Both ends of the first reset rod extend beyond the two longitudinal sides of the middle slide, the middle is hinged to the lower end of the middle pin, and both ends are connected to the corresponding cross beam through the first spring and the second spring respectively.

[0020] A further improvement of the present invention is that a second reset rod is provided between the middle slide and the middle connecting rod. The center line of the second reset rod coincides with that of the first reset rod, and a support rod is connected to the long side of the middle slide away from the first spring. The support rod is parallel to the first reset rod, and a third spring is provided between the outer end of the support rod and the outer end of the second reset rod.

[0021] A further improvement of the present invention is that a second limiting rod is provided between the first spring and the second spring and the corresponding long sides of the middle slide, one end of the second limiting rod is connected to the adjacent cross beam, and the other end thereof is connected to the corresponding sides of the two ends of the first reset rod.

[0022] A further improvement of the present invention is that a toe return rod is provided between the second reset rod and a side slide. The toe return rod has an adjustable length, one end of which abuts against one side of the inner end of the second reset rod, and the other end passes through the crossbeam and is connected to the side slide.

[0023] A further improvement of the present invention is that both the first sensor and the second sensor are displacement sensors.

[0024] It can be seen from the above scheme that there is a middle slide between the two beams. The middle slide is rectangular, its long side is parallel to the long side of the support frame, its length is less than the distance between the two beams, and there is a middle pin in the center. The two ends of the middle pin extend out of the upper and lower surfaces of the middle slide respectively. The middle of the middle connecting rod is hinged at the upper end of the middle pin. There are two guide rods under the middle slide. The longitudinal distance between the two guide rods and between the guide rod and the middle slide are parallel, and the two ends of the guide rod are connected to the corresponding beams respectively, and the middle slide is placed on the two guide rods in a sliding state. The first sensor is fixed on the middle slide. There is a second sensor on one side of the first sensor and the two are parallel, and there is a second touch rod between the second sensor and the beam. One end of the second touch rod is connected to the adjacent beam, and the other end is against the second sensor. The second sensor is connected to the controller by means of a wire.

[0025] When measuring a single front axle truck, first drive the wheels at both ends of the front axle of the truck to two release platforms at the same time, and the two release platforms release the control torque acting on the two front wheels. Then, drive the two front wheels to two side sliding platforms. When the front wheels enter the side sliding platform, the side sliding deviation of the two front wheels will drive the two side sliding platforms to move inward or outward at the same time. The movement amount is received by the first sensor and converted into an electrical signal and sent to the controller. After being calculated by the computer in the controller, it is finally displayed on the display in the controller.

[0026] When measuring a double front axle truck, first drive the wheels at both ends of the first front axle of the truck to two release platforms at the same time, and the two release platforms release the control torque acting on the two front wheels. At this time, the wheels at both ends of the second front axle are still on the ground, and the truck's direction control mechanism can only control the wheels at both ends of the second front axle. After that, the truck is driven forward and the wheels at both ends of the first front axle are driven to the two side slide platforms at the same time. If there is a side slip deviation on the wheels at both ends of the first front axle, the middle slide platform and the two side slide platforms will slide to the left or right at the same time. After that, the truck continues to move forward, and the wheels at both ends of the first front axle are driven to the ground, and the wheels at both ends of the second front axle are driven to the release platform, and the truck's control mechanism can only control the wheels at both ends of the first front axle. At this time, the wheels at both ends of the first front axle and the ground will drive the middle slide platform and the side slide platform to move left or right together through the tires. At this point, the synchronous side slip deviation of the wheels at both ends of the first front axle and the wheels at both ends of the second front axle will be received by the second sensor and converted into an electrical signal and sent to the controller. After being calculated by the computer in the controller, it will finally be displayed on the display in the controller. Based on the test results, the maintenance personnel will determine whether the front wheel control mechanism of the tested truck needs to be repaired.

[0027] It can be seen that the present invention can detect the sideslip of two wheels at both ends of a single front axle, and can also detect the sideslip of four wheels at both ends of a double front axle, and the scope of application is not limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a device for detecting the lateral sideslip of a front wheel of a truck according to the present invention;

[0029] Figure 2 yes Figure 1 A magnified view of point I;

[0030] Figure 3 yes Figure 1 A magnified view of point II;

[0031] Figure 4 yes Figure 2 AA section view;

[0032] Figure 5It is a diagram of the truck front wheel lateral sideslip detection device of the present invention without a sideslip platform and a release platform on the same side;

[0033] Figure 6 yes Figure 5 BB cross-sectional view;

[0034] Figure 7 yes Figure 5 CC cross-sectional view. DETAILED DESCRIPTION

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the truck front wheel lateral side slip detection device of the present invention comprises a support frame 4 and a controller. The support frame 4 is a rectangular frame, and two cross beams 7 are arranged inside it. The longitudinal centers of the two cross beams 7 are parallel, and their two ends are respectively welded to the inner sides of the two long frames of the support frame 4, and there is a spacing between the two cross beams 7 and between the two cross beams 7 and the short frames of the adjacent support frames 4.

[0036] A release platform 6 and a side sliding platform 5 that can slide left and right are arranged in the interval between the two cross beams 7 and the short frames of the adjacent support frames 4. The two side sliding platforms 5 are both rectangular plates of the same size and corresponding left and right. The two release platforms 6 are both rectangular plates of the same size and corresponding left and right. The sum of the width of the release platform 6 and the same-direction width of the side sliding platform 5 is equal to the interval between the two long frames of the support frame 4, and there is a sliding fit between one long side of the release platform 6 and the long side of the adjacent support frame 4 and between the side sliding platform 5 and the other long side of the adjacent support frame 4. There are gaps between the release platform 6 and the side sliding platform 5 and the adjacent cross beams 7 and the short frames of the support frame 4, so that the release platform 6 and the side sliding platform 5 can slide left and right between the adjacent cross beams 7 and the short frames of the support frame 4.

[0037] A connecting rod mechanism is arranged between the two cross beams 7. The connecting rod mechanism is hinged by a middle connecting rod 16 and two outer connecting rods 8 perpendicular thereto in an approximately Z-shaped shape. The non-hinged ends of the two outer connecting rods 8 pass through the adjacent cross beams 7 and are respectively connected to the corresponding side slides 5.

[0038] A through hole is formed on one of the cross beams 7, and a first touch rod 15 is installed in the through hole to be movably matched therewith. The first touch rod 15 is parallel to the longitudinal direction of the support frame 4, one end of which is connected to the adjacent side slide 5, and the other end of which is provided with a first sensor 12, and the first sensor 12 abuts against the adjacent end of the first touch rod 15.

[0039] A mounting plate 42 is disposed outside one end of the support frame 4. The mounting plate 42 is in the shape of a long strip, and its length is equal to the width of the support frame 4. The first photoelectric switch 1 and the second photoelectric switch 2 are disposed on the mounting plate 42 and the adjacent crossbeam 7. The two first photoelectric switches 1 correspond to the adjacent sides of the release platform 6 and the side slide platform 5, and the two second photoelectric switches 2 correspond to the side of the side slide platform 5 away from the release platform 6. The first sensor 12, the first photoelectric switch 1 and the second photoelectric switch 2 are all connected to the controller by wires.

[0040] A middle slide 3 is arranged between the two cross beams 7. The middle slide 3 is rectangular, and its long side is parallel to the long side of the support frame 4, and its length is less than the spacing between the two cross beams 7. An axial hole is processed in the center, and a middle pin 24 is installed in the axial hole. The two ends of the middle pin 24 extend out of the upper and lower surfaces of the middle slide 3 respectively. The middle connecting rod 16 is a long strip, and its longitudinal direction is perpendicular to the longitudinal direction of the cross bar. An axial hole is processed in the middle, and the middle is rotatably hinged to the upper end of the middle pin 24 by means of the axial hole on it. The two outer connecting rods 8 are perpendicular to the middle connecting rod, and one end of them is hinged to the two ends of the middle connecting rod 16 by means of a short pin, and the cross beams 7 corresponding to their other ends are provided with through holes. Short connecting rods 5 are installed in the through holes, and the two are movably matched. One end of the short connecting rod 5 is fixed to the corresponding side of the corresponding side slide 5, and the other end is hinged to the corresponding end of the corresponding outer connecting rod 8 by means of another short pin.

[0041] Two guide rods 22 are arranged under the middle slide 3. The two guide rods 22 and the longitudinal distance between the guide rods 22 and the middle slide 3 are parallel, and the two ends of the guide rods 22 are connected to the corresponding cross beams 7 by screws. Two sliders 30 are installed on the two guide rods 22, and the four sliders 30 are symmetrically connected to the lower surface of the middle slide 3 by screws, so that the middle slide 3 can slide along the longitudinal direction of the two guide rods 22 by means of the four sliders 30.

[0042] The first sensor 12 is fixed on the middle slide 3. A second sensor 11 is arranged on one side of the first sensor 12, and both the first sensor 12 and the second sensor 11 are displacement sensors. The first sensor 12 is parallel to the second sensor 11, and a second feeler rod 14 is arranged between the second sensor 11 and the cross beam 7. One end of the second feeler rod 14 is connected to the adjacent cross beam 7, and the other end is against the second sensor 11. The second sensor 11 is connected to the controller via a wire. For simplicity, the controller is omitted in the drawings.

[0043] like Figure 5 , Figure 6 and Figure 7As shown, a bottom plate 31 is fixed between the cross beam 7 and the short frames at both ends of the adjacent support frame 4. A first roller mechanism and a first limit mechanism are provided at both ends of the bottom plate 31 corresponding to the release platform 6. The first roller mechanism is composed of a first wheel seat 32 and a first load-bearing roller 33 horizontally mounted on the first wheel seat 32. The first limit mechanism includes a second wheel seat 34, on which two mutually parallel vertical shafts are fixed, and rotatable first guide rollers 35 are mounted on both vertical shafts, and a first gap is left between the first guide rollers 35 on the two vertical shafts. A first guide bar 36 is connected to the bottom of both ends of the release platform 6 corresponding to the first gap. The longitudinal direction of the first guide bar 36 is parallel to the longitudinal direction of the release platform 6, one of its long sides is fixed on the lower surface of the release platform 6, and its lower side extends into the first gap and is movably matched with the first guide roller 35.

[0044] A second limiting mechanism is provided in the longitudinal middle of the bottom plate 31 corresponding to the side sliding platform 5. The second limiting mechanism corresponds to the longitudinal center of the side sliding platform 5, and has a second load-bearing roller mechanism on both lateral sides. The second limiting mechanism contains a third wheel seat 37, on which there are two vertical axes parallel to each other, on which there are rotatable second guide rollers 38, and a second gap is left between the second guide rollers 38 on the two vertical axes. A second guide strip 39 is provided below the longitudinal middle of the side sliding platform 5 corresponding to the second gap. The second guide strip 39 is a strip-shaped plate, the upper side of which is fixed on the lower surface of the side sliding platform 5, and the lower side thereof extends into the second gap and is movably matched with the second guide roller 38. The second load-bearing roller mechanism consists of a fourth wheel seat 40 and a second load-bearing roller 41 horizontally mounted on the fourth wheel seat 40.

[0045] like Figure 1 , Figure 3 and Figure 5 As shown, rod holes are processed on the cross beams 7 corresponding to the inner ends of the release platform 6, and a spring rod 26 is fixed in the rod hole. Both ends of the spring rod 26 extend outside the two sides of the cross beam 7. The inner end of the spring rod 26 abuts against the release platform 6. An inner spring 27 is sleeved on the section of the spring rod 26 between the release platform 6 and the adjacent cross beam 7, and a nut 29 is installed on the outer end of the spring rod 26. An outer spring 28 is arranged on the section of the spring rod 26 between the nut 29 and the cross beam 7. By screwing the nut 29, the inner spring 27 and the outer spring 28 are adjusted so that the release platform 6 is in the middle position between the short frame of the corresponding support frame 4 and the adjacent cross beam 7 in the non-working state.

[0046] like Figure 4 As shown, in order to facilitate the connection between the two ends of the guide rod 22 and the two cross beams 7, connecting blocks 23 are fixed on the adjacent sides of the cross beams 7, and the two ends of the guide rod 22 are respectively connected to the corresponding connecting blocks 23 by means of screws.

[0047] like Figure 1 , Figure 2 ,and Figure 5 As shown, a first reset rod 9 is arranged between the middle slide 3 and the guide rod 22. Both ends of the first reset rod 9 extend outside the two longitudinal sides of the middle slide 3, and the middle is hinged at the lower end of the middle pin 24, and both ends are connected to the corresponding cross beam 7 through the first spring 20 and the second spring 10 respectively. The reset of the middle slide 3 after the test can be achieved through the first reset rod 9 and the first spring 20 and the second spring 10. Among them, a second limit rod 13 is arranged between the first spring 20 and the second spring 10 and the corresponding long sides of the middle slide 3, and one end of the second limit rod 13 is connected to the adjacent cross beam 7, and the other end thereof abuts against the corresponding sides of the two ends of the first reset rod 9.

[0048] There is a second reset rod 19 between the middle slide 3 and the middle connecting rod 16. The center line of the second reset rod 19 coincides with that of the first reset rod 9, and a support rod 17 is connected to the long side of the middle slide 3 away from the first spring 20. The support rod 17 is parallel to the first reset rod 9, and a third spring 18 is connected between the outer end of the support rod 17 and the outer end of the second reset rod 19. The second reset rod 19 and the third spring 18 can realize the reset of the two side slides 5 after testing.

[0049] In order to facilitate the positioning of the two side slides 5, a toe return rod 21 is provided between the second return rod 19 and one side slide 5. The toe return rod 21 has an adjustable length, one end of which abuts against one side of the inner end of the second return rod 19, and the other end passes through the cross beam 7 and is connected to the side slide 5.

Claims

1. A detection device for the lateral side slip of a front wheel of a truck, comprising a support frame and a controller; the support frame is rectangular and has two crossbeams therein; a release platform and a side slip platform that can slide left and right are provided between the two crossbeams and the short frames of the adjacent support frames; the two side slip platforms are rectangular plates of the same size and corresponding to each other left and right, and the two release platforms are rectangular plates of the same size and corresponding to each other left and right, and the sum of the width of the release platform and the same-direction width of the side slip platform is equal to the spacing between the two long frames of the support frame; there are gaps between the release platform and the side slip platform and the adjacent crossbeams and the short frames of the support frame; There is a connecting rod mechanism between the two crossbeams; the connecting rod mechanism is formed by hingedly connecting a middle connecting rod and two outer connecting rods perpendicular thereto; the non-hinged ends of the outer connecting rods are connected to the corresponding side sliding platforms after passing through the adjacent crossbeams; One of the crossbeams has a through hole, in which a first touch rod is movably engaged; the first touch rod is parallel to the longitudinal direction of the support frame, one end of the first touch rod is connected to the adjacent side slide table, and the other end of the first touch rod has a first sensor, and the first sensor abuts against the adjacent end of the first touch rod; A first photoelectric switch is provided at both ends of the adjacent sides of a release platform and an adjacent side sliding platform, and a second photoelectric switch is provided at one side of the side sliding platform away from the release platform; the first sensor, the first photoelectric switch and the second photoelectric switch are all connected to the controller by means of wires; Features: There is a middle slide between the two beams; the middle slide is rectangular, its long side is parallel to the long side of the support frame, its length is less than the distance between the two beams, and there is a middle pin at its center; the two ends of the middle pin extend out of the upper and lower surfaces of the middle slide respectively; the middle of the middle connecting rod is hinged to the upper end of the middle pin; There are two guide rods under the middle slide; the guide rods are parallel to each other and to the middle slide in the longitudinal direction, the two ends of the guide rods are respectively connected to the corresponding cross beams, and the middle slide and the guide rods are in sliding cooperation in the longitudinal direction; The first sensor is fixed on the middle slide; a second sensor is arranged on one side of the first sensor and the two are parallel to each other, and a second touch rod is arranged between the second sensor and the cross beam; one end of the second touch rod is connected to the adjacent cross beam, and the other end is against the second sensor; the second sensor is connected to the controller by means of a wire.

2. The truck front wheel lateral slip detection device according to claim 1, characterized in that: There is a bottom plate between the crossbeam and the short side frames at both ends of the adjacent support frame, and there are first roller mechanisms and first limiting mechanisms at both ends of the bottom plate corresponding to the release platform; the first roller mechanism is composed of a first wheel seat and a first load-bearing roller horizontally installed on the first wheel seat; the first limiting mechanism contains a second wheel seat, and the second wheel seat has two vertical axes parallel to each other, and there are rotatable first guide rollers on the two vertical axes, and there is a first gap between the first guide rollers on the two vertical axes; first guide strips are connected to the bottom of both ends of the release platform corresponding to the first gap, and the first guide strips are located in the first gap and are movably matched with the first guide rollers.

3. The truck front wheel lateral slip detection device according to claim 2, characterized in that: There is a second limiting mechanism in the longitudinal middle of the bottom plate corresponding to the side sliding table; the second limiting mechanism corresponds to the longitudinal center of the side sliding table, and there are second load-bearing roller mechanisms on both lateral sides thereof; the second limiting mechanism contains a third wheel seat, and the third wheel seat has two mutually parallel vertical axes, and there are rotatable second guide rollers on the two vertical axes, and there is a second gap between the second guide rollers on the two vertical axes; second guide strips are connected to the bottom of the two longitudinal sides of the side sliding table corresponding to the second gap, and the second guide strips are located in the second gap and are movably matched with the second guide rollers; the second load-bearing roller mechanism consists of a fourth wheel seat and a second load-bearing roller horizontally installed on the fourth wheel seat.

4. The truck front wheel lateral slip detection device according to claim 2, characterized in that: There is a rod hole on the crossbeam corresponding to the inner end of the release platform, and a spring rod is fixed in the rod hole; both ends of the spring rod extend outside the two sides of the crossbeam; the inner end of the spring rod abuts against the release platform; there is an inner spring on the section of the spring rod between the release platform and the adjacent crossbeam, a nut is provided at the outer end of the spring rod, and there is an outer spring on the section of the spring rod between the nut and the crossbeam.

5. The truck front wheel lateral slip detection device according to claim 1, characterized in that: The adjacent side surface of the cross beam is provided with a connecting block, and the two ends of the guide rod are respectively connected to the corresponding connecting blocks.

6. The truck front wheel lateral slip detection device according to claim 1, characterized in that: A first reset rod is arranged between the middle slide and the guide rod; both ends of the first reset rod extend beyond the two longitudinal sides of the middle slide, the middle is hinged at the lower end of the middle pin shaft, and both ends are connected to the corresponding cross beam through the first spring and the second spring respectively.

7. The truck front wheel lateral slip detection device according to claim 6, characterized in that: There is a second reset rod between the middle slide and the middle connecting rod; the center line of the second reset rod coincides with that of the first reset rod, and a support rod is connected to the long side of the middle slide away from the first spring; the support rod is parallel to the first reset rod, and a third spring is arranged between the outer end of the support rod and the outer end of the second reset rod.

8. The truck front wheel lateral slip detection device according to claim 6, characterized in that: A second limiting rod is disposed between the first spring, the second spring and the corresponding long sides of the middle slide, one end of the second limiting rod is connected to the adjacent cross beam, and the other end thereof abuts against the corresponding sides of the two ends of the first reset rod.

9. The truck front wheel lateral slip detection device according to claim 7, characterized in that: A toe return rod is arranged between the second reset rod and a side sliding platform; the toe return rod is adjustable in length, one end of the toe return rod abuts against one side of the inner end of the second reset rod, and the other end passes through the cross beam and is connected to the side sliding platform on that side.

10. The truck front wheel lateral slip detection device according to claim 1, characterized in that: The first sensor and the second sensor are both displacement sensors.

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