A semi-trailer vehicle axle load intelligent monitoring device

Abstract

The present invention relates to the technical field of axle load monitoring of semi-trailers, and in particular to an intelligent axle load monitoring device for a semi-trailer vehicle, wherein a first pulley is fixed at the bottom end of a vehicle plate, the first pulley is arranged just above a vehicle axle, the monitoring box is laterally fixed at the middle position of two vehicle axles at the bottom end of the vehicle plate, pistons are slidably connected to the inner sides of both left and right ends of the monitoring box, a second spring is arranged on the outer side of a connecting rod, the two ends of the second spring are respectively fixedly connected to the inner sides of the ends of the monitoring box and one end of the piston, a connecting rod is fixedly connected to the side of the piston away from the center of the monitoring box, the distance between the vehicle axle and the vehicle plate will change when the vehicle is unloaded and loaded, when unloaded, the vertical distance between the vehicle axle and the vehicle plate increases, when loaded, the distance between the vehicle axle and the vehicle plate decreases, the distance between the axle and the vehicle plate can be recorded as L1 and L2 respectively, and the axle load distribution of the vehicle can be analyzed by analyzing the size between L1 and L2.

Description

Technical Field

[0001] The invention relates to the technical field of semitrailer axle load monitoring, and in particular to an intelligent axle load monitoring device for a semitrailer vehicle. Background Art

[0002] The axle load of a vehicle, also known as axle weight, refers to the vehicle load borne by each axle. The driving, braking, steering and other control processes of autonomous vehicles all require the participation of axle load data, and the more accurate the axle load data, the better the control effect.

[0003] Currently, the vehicle load in a stationary state can be obtained by weighing the vehicle on a scale, and then the vehicle axle load can be calculated and used as the basis for controlling the vehicle. Since the vehicle axle load under different load conditions may vary greatly, the vehicle axle load determined in the above manner has poor accuracy and is difficult to be used as the basis for vehicle control.

[0004] like Figure 1 As shown, the vehicle plate 1 is connected to the vehicle axle 8 by a shock absorbing mechanism. If a steel plate is used for shock absorption, the distance between the axle 8 and the vehicle plate will change when the vehicle is unloaded and loaded. When unloaded, the distance between the axle 8 and the vehicle plate increases, and when loaded, the distance between the axle 8 and the vehicle plate decreases. For a double-axle semi-trailer, the distance between the axle and the vehicle plate can be recorded as L1 and L2 respectively. By analyzing the size between L1 and L2, the axle load distribution of the vehicle can be analyzed.

[0005] Therefore, in order to solve the above problems, an intelligent monitoring device for axle load of a semitrailer is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent monitoring device for the axle load of a semi-trailer vehicle to solve the problem raised in the above background technology that "the axle load detected by the scale in the empty state in the prior art is quite different from the axle load of the vehicle in the actual loaded state, the accuracy is poor, and it is difficult to use it as a basis for controlling the vehicle."

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intelligent monitoring device for axle load of a semitrailer vehicle, comprising a monitoring box and a first pulley, the first pulley is fixed at the bottom end of the vehicle plate, the first pulley is arranged just above the vehicle axle, the monitoring box is transversely fixed at the middle position of the two vehicle axles at the bottom end of the vehicle plate, pistons are slidably connected to the inner sides of the left and right ends of the monitoring box, a second spring is arranged on the outer side of the connecting rod, the two ends of the second spring are respectively fixedly connected to the inner side of the end of the monitoring box and one end of the piston, the side of the piston away from the center of the monitoring box is fixedly connected to the connecting rod, the other end of the connecting rod is fixedly connected to the first pulley, and the first pull rope is fixedly connected to the top end of the vehicle axle by passing through the first pulley;

[0008] In the no-load state, the piston has space to move leftward and rightward, and the first pull rope is in a stretched state;

[0009] An integral axle load detection mechanism is arranged at the central bottom end of the monitoring box, and an axle load distribution detection mechanism is arranged on the inner side of the monitoring box.

[0010] As a preferred intelligent monitoring device for axle load of a semi-trailer vehicle, the overall axle load detection mechanism includes a connecting shell connected to the central bottom end of the monitoring box, a slider is slidably connected to the inner side of the connecting shell, a through hole is opened at the bottom end of the connecting shell, a position sensor is embedded on the inner wall of the connecting shell, the slider is slidably connected to the surface of the position sensor, the position of the slider is obtained through the position sensor, a first spring is arranged in the connecting shell, and both ends of the first spring are fixedly connected to the bottom end of the slider and the inner side of the bottom end of the connecting shell.

[0011] As a preferred intelligent monitoring device for axle load of a semi-trailer vehicle, the vertical distance from the left first pulley to the left axle is L1, and the vertical distance from the right first pulley to the left axle is L2.

[0012] Under the above settings, because the vehicle plate and the vehicle axle are connected through a shock-absorbing mechanism, such as using a steel plate for shock absorption, the shock-absorbing mechanism includes a fixed plate fixed to the bottom end of the vehicle plate, a shock-absorbing steel plate fixedly connected between the fixed plates, a connecting plate fixedly connected to the bottom end of the shock-absorbing steel plate, and an axle installed in the axle, and the axle is fixedly installed in the connecting plate. When the vehicle is unloaded and loaded, the distance between the axle and the vehicle plate will change. When unloaded, the vertical distance between the axle and the vehicle plate increases, and when loaded, the distance between the axle and the vehicle plate decreases. For a double-axle semi-trailer, the distance between the axle and the vehicle plate can be recorded as L1 and L2 respectively. By analyzing the size between L1 and L2, the axle load distribution of the vehicle can be analyzed.

[0013] The present invention can monitor the overall axle load of the vehicle plate through an overall axle load detection mechanism. When the vehicle is loaded, the shock-absorbing steel plate is compressed, and the distance between L1 and L2 is reduced accordingly. Under the action of the first spring, the piston pulls the first pull rope to move toward the center of the monitoring box. At this time, the volume of the cavity between the two pistons decreases, and the pressure in the cavity increases. The pressure in the connecting shell connected to the cavity also increases. In this case, the slider overcomes the elastic force of the first spring and moves downward. The position of the slider is obtained by the position sensor. The higher the position of the slider is, the greater the overall axle load of the surface vehicle is, thereby realizing the function of monitoring the overall axle load of the vehicle.

[0014] Preferably, the intelligent monitoring device for axle load of a semi-trailer vehicle comprises: the axle load distribution detection component comprises a telescopic cylinder and a third pulley which are rotatably connected via a rotating shaft in the middle position of a monitoring box, the third pulley is fixed on the inner side of the bottom end of the monitoring box, the rotation center of the telescopic cylinder is at the center position of the telescopic cylinder, the two ends of the telescopic cylinder are respectively facing two pistons, the piston is connected to one end of the telescopic cylinder on this side via an elastic component, when L2 is different from L1, the two pistons move asynchronously, the pulling forces of the elastic components on both sides are different, and the telescopic cylinder is tilted to show the axle load distribution of the vehicle.

[0015] Preferably, as a semi-trailer vehicle axle load intelligent monitoring device, both ends of the telescopic cylinder are slidably connected with a sliding rod for distance compensation, a fourth spring is arranged on the outside of the sliding rod, and both ends of the fourth spring are respectively fixedly connected to the inner side of one end of the telescopic cylinder and the inner side of one end of the sliding rod, and the fourth spring in the telescopic cylinder is used to reset the sliding rod.

[0016] As a preferred intelligent monitoring device for axle load of a semi-trailer vehicle, a tilt sensor is fixedly connected to the center position of the top end of the telescopic cylinder, and the inclination of the telescopic cylinder is obtained through the tilt sensor.

[0017] As a preferred intelligent monitoring device for axle load of a semi-trailer vehicle, the elastic component is an elastic rope, which is wound around the third pulley, and its two ends are respectively fixedly connected to one end of the piston and one end of the side sliding rod.

[0018] Under the above settings, the present invention can also monitor the axle load distribution of the two axles in the vehicle by the axle load distribution detection component. When the axle load distribution of the two axles of the vehicle is consistent, L2 is the same as L1, the two pistons move synchronously, the elastic components on both sides pull the same, and the telescopic cylinder will maintain a horizontal state;

[0019] When the axle load distribution of the two axles of the vehicle is inconsistent, that is, the load distribution of the vehicle is uneven or a single axle passes through a bumpy road, L2 and L1 will be different, resulting in asynchronous movement of the two pistons, resulting in different pulling forces of the elastic components on both sides, and the telescopic cylinder will tilt to show the axle load distribution of the vehicle. This monitoring method of the vehicle axle load distribution can monitor the uniformity of the axle load distribution on both sides of the vehicle in real time while the vehicle is driving, avoiding safety problems caused by large uneven axle load distribution on both sides;

[0020] Because the span of the vehicle plate is large, when the axle loads on both sides are unevenly distributed, the inclination of the vehicle plate is relatively small. Compared with directly observing the vehicle plate, it is difficult to detect the small inclination. The axle load distribution detection component of the present invention can display the inclination of the vehicle plate through the telescopic cylinder and the third pulley and use a shorter telescopic cylinder to increase the inclination of the telescopic cylinder. The third pulley is used to change the pulling direction of the telescopic cylinder, thereby increasing the sensitivity of monitoring;

[0021] The tilt sensor is used to obtain the tilt of the telescopic cylinder. The greater the tilt of the telescopic cylinder, the more uneven the axle load distribution is.

[0022] When the elastic component is an elastic rope, the movement of the pistons on both sides will pull the telescopic cylinder through the elastic rope, and the asynchronous movement of the pistons will cause the elastic rope to be different, so that the telescopic cylinder will tilt. The telescopic cylinder is slidably connected with a sliding rod for distance compensation, which is used to increase the pulling range of the elastic rope and the angle span of the telescopic cylinder;

[0023] Preferably, as an intelligent monitoring device for axle load of a semi-trailer vehicle, the elastic component includes a limit rod and a fourth pulley, the limit rod is fixed up and down on the inner side of the monitoring box, the fourth pulley is also fixed on the inner side of the bottom end of the monitoring box, flush with the third pulley, the third pulley and the fourth pulley are respectively distributed on both sides of the limit rod, the outer side of the limit rod is slidably connected to a lifting block, one end of the lifting block is fixedly connected to the second pulley, the outer side of the limit rod is provided with a third spring, and the two ends of the third spring are respectively fixedly connected to the bottom end of the monitoring box and the bottom end of the lifting block.

[0024] Preferably, as an intelligent monitoring device for axle load of a semi-trailer vehicle, one end of the piston is fixedly connected to a second pull rope, and the second pull rope is fixedly connected to one end of the side sliding rod after passing through the fourth pulley, the second pulley and the third pulley in sequence.

[0025] Under the above setting, when the elastic component is a limit rod and a fourth pulley, etc., the movement of the pistons on both sides will pull the telescopic cylinder through the second pull rope, and the movable second pulley and the third spring give the second pull rope the ability to elastically expand and contract. The asynchronous movement of the pistons on both sides will cause the third spring to be compressed to different degrees, thereby causing different pulling forces at one end of the second pull rope close to the telescopic cylinder. A sliding rod for distance compensation is slidably connected to the telescopic cylinder, which is used to increase the pulling range of the second pull rope and the angle span of the telescopic cylinder.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. A semi-trailer vehicle axle load intelligent monitoring device, because the vehicle plate and the vehicle axle are connected through a shock-absorbing mechanism, such as using a steel plate for shock absorption, the shock-absorbing mechanism includes a fixed plate fixed at the bottom end of the vehicle plate, a shock-absorbing steel plate fixedly connected between the fixed plates, a connecting plate fixedly connected to the bottom end of the shock-absorbing steel plate, an axle installed in the axle, and the axle fixedly installed in the connecting plate. When the vehicle is unloaded and loaded, the distance between the axle and the vehicle plate will change. When unloaded, the vertical distance between the axle and the vehicle plate increases. When loaded, the distance between the axle and the vehicle plate decreases. For a double-axle semi-trailer, the distance between the axle and the vehicle plate can be recorded as L1 and L2 respectively. By analyzing the size between L1 and L2, the axle load distribution of the vehicle can be analyzed.

[0028] 2. The intelligent monitoring device for axle load of a semi-trailer vehicle can monitor the overall axle load of the vehicle plate through an overall axle load detection mechanism. When the vehicle is loaded, the shock-absorbing steel plate is compressed, and the distance between L1 and L2 is reduced accordingly. Under the action of the first spring, the piston pulls the first pull rope to move toward the center of the monitoring box. At this time, the volume of the cavity between the two pistons decreases, and the pressure in the cavity increases. The pressure in the connecting shell connected to the cavity also increases. In this case, the slider overcomes the elastic force of the first spring and moves downward. The position of the slider is obtained by the position sensor. The higher the position of the slider is, the greater the overall axle load of the surface vehicle is, thereby realizing the function of monitoring the overall axle load of the vehicle.

[0029] 3. When the axle load distribution of the two axles of the semi-trailer vehicle is inconsistent, that is, the load distribution of the vehicle is uneven or a single axle passes through a bumpy road, L2 and L1 will be different, resulting in asynchronous movement of the two pistons, resulting in different pulling forces of the elastic components on both sides, and the telescopic cylinder will tilt to show the vehicle axle load distribution. This vehicle axle load distribution monitoring method can monitor the uniformity of the axle load distribution on both sides of the vehicle in real time while the vehicle is driving, avoiding safety problems caused by large uneven axle load distribution on both sides.

[0030] 4. The intelligent monitoring device for axle load of a semi-trailer vehicle has a large span of the vehicle plate. When the axle loads on both sides are unevenly distributed, the inclination of the vehicle plate is relatively small. Compared with directly observing the vehicle plate, it is difficult to detect the slight inclination. The axle load distribution detection component of the present invention can display the inclination of the vehicle plate through the telescopic cylinder and the third pulley with a shorter telescopic cylinder, thereby increasing the inclination of the telescopic cylinder. The third pulley is used to change the pulling direction of the telescopic cylinder, thereby increasing the sensitivity of monitoring. The inclination sensor is used to obtain the inclination of the telescopic cylinder. When the inclination of the telescopic cylinder is larger, the more uneven the axle load distribution is.

[0031] 5. In this intelligent monitoring device for axle load of a semi-trailer vehicle, when the elastic component is an elastic rope, the movement of the pistons on both sides will pull the telescopic cylinder through the elastic rope, and the asynchronous movement of the pistons will cause the difference in the elastic rope, thereby causing the telescopic cylinder to tilt. A sliding rod for distance compensation is slidably connected to the telescopic cylinder to increase the pulling range of the elastic rope and the angle span of the telescopic cylinder.

[0032] 6. In this intelligent monitoring device for axle load of a semi-trailer vehicle, when the elastic component is a limit rod and a fourth pulley, the movement of the pistons on both sides will pull the telescopic cylinder through the second pull rope, and the movable second pulley and the third spring give the second pull rope the ability to elastically expand and contract. The asynchronous movement of the pistons on both sides will cause the third spring to be compressed to different degrees, thereby causing different pulling forces at one end of the second pull rope close to the telescopic cylinder. A sliding rod for distance compensation is slidably connected to the telescopic cylinder to increase the pulling range of the second pull rope and the angle span of the telescopic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall cross-sectional installation structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the appearance structure of the monitoring box of the present invention;

[0035] Figure 3 This is a schematic diagram of the internal structure of the monitoring box when the vehicle is unloaded and the axle load is evenly distributed according to the first embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the internal structure of the monitoring box when the vehicle is loaded and the axle load is evenly distributed according to the first embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the internal structure of the monitoring box when the vehicle is loaded and the axle load is unevenly distributed according to the first embodiment of the present invention;

[0038] Figure 6 For the present invention Figure 4 A schematic diagram of the structure at A;

[0039] Figure 7 For the present invention Figure 4 Schematic diagram of the structure at B;

[0040] Figure 8 This is a schematic diagram of the appearance structure of the limiting rod of the first embodiment of the present invention;

[0041] Fig. 9 It is a schematic diagram of the internal cross-sectional structure of the slide rod of the present invention;

[0042] Fig.10 This is another schematic diagram of the installation structure of the monitoring box according to the second embodiment of the present invention.

[0043] In the figure: 1. vehicle plate; 2. fixing plate; 3. shock-absorbing steel plate; 4. first pulley; 5. first pull rope; 6. monitoring box; 7. connecting plate; 8. vehicle axle; 9. vehicle axle; 10. connecting rod; 11. connecting shell; 12. cavity; 13. telescopic cylinder; 14. limiting rod; 15. second pull rope; 16. position sensor; 17. through hole; 18. first spring; 19. second spring; 20. sliding block; 21. lifting block; 22. second pulley; 23. third spring; 24. third pulley; 25. fourth pulley; 26. tilt sensor; 27. sliding rod; 28. fourth spring; 29. ​​elastic rope; 30. piston. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example 1, please refer to Figure 1-9 The present invention provides a technical solution: an intelligent monitoring device for axle load of a semitrailer vehicle, comprising a monitoring box 6 and a first pulley 4, wherein the first pulley 4 is fixed at the bottom end of a vehicle plate 1, and the first pulley 4 is arranged just above a vehicle axle 8, and the monitoring box 6 is transversely fixed at the middle position of two vehicle axles 8 at the bottom end of the vehicle plate 1, and pistons 30 are slidably connected to the inner sides of both left and right ends of the monitoring box 6, and a second spring 19 is arranged on the outer side of a connecting rod 10, and the two ends of the second spring 19 are respectively fixedly connected to the inner side of the end of the monitoring box 6 and one end of the piston 30, and the side of the piston 30 away from the center of the monitoring box 6 is fixedly connected to the connecting rod 10, and the other end of the connecting rod 10 is fixedly connected to the first pull rope 5, and the first pull rope 5 passes around the first pulley 4 and is fixedly connected to the top end of the vehicle axle 8;

[0046] In the no-load state, the piston 30 has space to move leftward and rightward, and the first pull rope 5 is in a stretched state;

[0047] An integral axle load detection mechanism is disposed at the central bottom end of the monitoring box 6 , and an axle load distribution detection mechanism is disposed inside the monitoring box 6 .

[0048] Specifically, the overall axle load detection mechanism includes a connecting shell 11 connected to the central bottom end of the monitoring box 6, a slider 20 is slidably connected to the inner side of the connecting shell 11, a through hole 17 is opened at the bottom end of the connecting shell 11, a position sensor 16 is embedded on the inner wall of the connecting shell 11, the slider 20 is slidably connected to the surface of the position sensor 16, and the position of the slider 20 is obtained through the position sensor 16. A first spring 18 is arranged in the connecting shell 11, and both ends of the first spring 18 are fixedly connected to the bottom end of the slider 20 and the inner side of the bottom end of the connecting shell 11.

[0049] Specifically, the vertical distance from the left first pulley 4 to the left axle 8 is L1, and the vertical distance from the right first pulley 4 to the left axle 8 is L2.

[0050] Under the above setting, because the vehicle plate 1 is connected to the vehicle axle 8 through a shock-absorbing mechanism, such as using a steel plate for shock absorption, the shock-absorbing mechanism includes a fixed plate 2 fixed to the bottom end of the vehicle plate 1, a shock-absorbing steel plate 3 fixedly connected between the fixed plates 2, a connecting plate 7 fixedly connected to the bottom end of the shock-absorbing steel plate 3, an axle 9 installed in the axle 8, and the axle 8 fixedly installed in the connecting plate 7. When the vehicle is unloaded and loaded, the distance between the axle 8 and the vehicle plate 1 will change. When unloaded, the vertical distance between the axle 8 and the vehicle plate 1 increases, and when loaded, the distance between the axle 8 and the vehicle plate 1 decreases. For a double-axle semi-trailer, the distance between the axle and the vehicle plate 1 can be recorded as L1 and L2 respectively. By analyzing the size between L1 and L2, the axle load distribution of the vehicle can be analyzed.

[0051] The present invention can monitor the overall axle load of the vehicle plate 1 through an overall axle load detection mechanism. When the vehicle is loaded, the shock-absorbing steel plate 3 is compressed, and the distance between L1 and L2 is reduced accordingly. Under the action of the first spring 18, the piston 30 pulls the first pull rope 5 to move toward the center direction of the monitoring box 6. At this time, the volume of the cavity 12 between the two pistons 30 decreases, and the pressure in the cavity 12 increases. The pressure in the connecting shell 11 connected to the cavity 12 also increases. In this case, the slider 20 overcomes the elastic force of the first spring 18 and moves downward. The position of the slider 20 is obtained by the position sensor 16. The higher the position of the slider 20 is, the greater the overall axle load of the surface vehicle is, thereby realizing the function of monitoring the overall axle load of the vehicle.

[0052] Specifically, the axle load distribution detection component includes a telescopic cylinder 13 and a third pulley 24 which are rotatably connected via a rotating shaft in the middle position of the monitoring box 6. The third pulley 24 is fixed on the inner side of the bottom end of the monitoring box 6. The rotation center of the telescopic cylinder 13 is at the center position of the telescopic cylinder 13. The two ends of the telescopic cylinder 13 face two pistons 30 respectively. The piston 30 is connected to one end of the telescopic cylinder 13 on this side through an elastic component. When L2 is different from L1, the two pistons 30 move asynchronously, the pulling force of the elastic components on both sides is different, and the telescopic cylinder 13 is tilted to show the axle load distribution of the vehicle.

[0053] Specifically, both ends of the telescopic cylinder 13 are slidably connected with a slide rod 27 for distance compensation, and a fourth spring 28 is arranged on the outer side of the slide rod 27. Both ends of the fourth spring 28 are respectively fixedly connected to the inner side of one end of the telescopic cylinder 13 and the inner side of one end of the slide rod 27. The fourth spring 28 in the telescopic cylinder 13 is used to reset the slide rod 27.

[0054] Specifically, a tilt sensor 26 is fixedly connected to the center position of the top end of the telescopic cylinder 13 , and the tilt sensor 26 is used to obtain the inclination of the telescopic cylinder 13 .

[0055] Specifically, the elastic component is an elastic rope 29, which is wound around the third pulley 24, and its two ends are fixedly connected to one end of the piston 30 and one end of the side sliding rod 27 respectively.

[0056] Under the above settings, the present invention can also monitor the axle load distribution of the two axles in the vehicle by the axle load distribution detection component. When the axle load distribution of the two axles of the vehicle is consistent, L2 is the same as L1, the two pistons 30 move synchronously, the elastic components on both sides pull the same, and the telescopic cylinder 13 will maintain a horizontal state;

[0057] When the axle load distribution of the two axles of the vehicle is inconsistent, that is, the load distribution of the vehicle is uneven or a single axle 8 passes through a bumpy road, L2 and L1 will be different, resulting in asynchronous movement of the two pistons 30, resulting in different pulling forces of the elastic components on both sides, and the telescopic cylinder 13 is tilted to show the axle load distribution of the vehicle. This monitoring method of the axle load distribution of the vehicle can monitor the uniformity of the axle load distribution on both sides of the vehicle in real time during the vehicle driving, avoiding safety problems caused by large uneven axle load distribution on both sides;

[0058] Because the span of the vehicle plate 1 is large, when the axle loads on both sides are unevenly distributed, the inclination of the vehicle plate 1 is relatively small. Compared with directly observing the vehicle plate 1, it is difficult to detect the small inclination. The axle load distribution detection component of the present invention can display the inclination of the vehicle plate 1 through the telescopic cylinder 13 and the third pulley 24 and use a shorter telescopic cylinder 13 to increase the inclination of the telescopic cylinder 13. The third pulley 24 is used to change the pulling direction of the telescopic cylinder 13, thereby increasing the sensitivity of monitoring;

[0059] The tilt sensor 26 is used to obtain the tilt of the telescopic cylinder 13. The greater the tilt of the telescopic cylinder 13, the more uneven the axle load distribution is.

[0060] Specifically, the elastic component includes a limit rod 14 and a fourth pulley 25. The limit rod 14 is fixed on the inner side of the monitoring box 6 up and down. The fourth pulley 25 is also fixed on the inner side of the bottom end of the monitoring box 6 and is flush with the third pulley 24. The third pulley 24 and the fourth pulley 25 are respectively distributed on both sides of the limit rod 14. The outer side of the limit rod 14 is slidably connected with a lifting block 21, and one end of the lifting block 21 is fixedly connected with the second pulley 22. A third spring 23 is arranged on the outer side of the limit rod 14, and the two ends of the third spring 23 are respectively fixedly connected to the bottom end of the monitoring box 6 and the bottom end of the lifting block 21.

[0061] Specifically, one end of the piston 30 is fixedly connected to the second pull rope 15 , and the second pull rope 15 is fixedly connected to one end of the side sliding rod 27 after passing through the fourth pulley 25 , the second pulley 22 and the third pulley 24 in sequence.

[0062] Under the above setting, when the elastic component is a limit rod 14 and a fourth pulley 25, etc., the movement of the pistons 30 on both sides will pull the telescopic cylinder 13 through the second pull rope 15, and the movable second pulley 22 and the third spring 23 give the second pull rope 15 the ability of elastic expansion and contraction. The asynchronous movement of the pistons 30 on both sides will cause the third spring 23 to be compressed to different degrees, thereby causing different pulling forces on the end of the second pull rope 15 close to the telescopic cylinder 13. The telescopic cylinder 13 is slidably connected with a sliding rod 27 for distance compensation, which is used to increase the pulling range of the second pull rope 15 and the angle span of the telescopic cylinder 13.

[0063] Example 2, please refer to Figure 1-2 and Figure 9-10 This embodiment is an optional alternative to embodiment 1, and the same parts are not repeated here. The difference is that when the elastic component is an elastic rope 29, the movement of the pistons 30 on both sides will pull the telescopic cylinder 13 through the elastic rope 29, and the asynchronous movement of the pistons 30 will cause the elastic rope 29 to be different, thereby causing the telescopic cylinder 13 to tilt. The telescopic cylinder 13 is slidably connected with a sliding rod 27 for distance compensation, which is used to increase the pulling range of the elastic rope 29 and the angle span of the telescopic cylinder 13.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent monitoring device for axle load of a semitrailer, comprising a monitoring box (6) and a first pulley (4), characterized in that: The first pulley (4) is fixed to the bottom end of the vehicle plate (1), the first pulley (4) is arranged just above the axle (8), the monitoring box (6) is transversely fixed at the middle position of the two axles (8) at the bottom end of the vehicle plate (1), the inner sides of the left and right ends of the monitoring box (6) are slidably connected with pistons (30), a cavity (12) is formed between the two pistons (30), a second spring (19) is arranged on the outer side of the connecting rod (10), the two ends of the second spring (19) are respectively fixedly connected to the inner side of the end of the monitoring box (6) and one end of the piston (30), the side of the piston (30) away from the center of the monitoring box (6) is fixedly connected to the connecting rod (10), the other end of the connecting rod (10) is fixedly connected to the first pull rope (5), the first pull rope (5) passes around the first pulley (4) and is fixedly connected to the top of the axle (8); In the no-load state, the piston (30) has space to move leftward and rightward, and the first pull rope (5) is in a stretched state; An integral axle load detection mechanism is provided at the central bottom end of the monitoring box (6), and an axle load distribution detection mechanism is provided on the inner side of the monitoring box (6); The overall axle load detection mechanism comprises a connecting shell (11) connected to the central bottom end of the monitoring box (6); a slider (20) is slidably connected to the inner side of the connecting shell (11); a through hole (17) is provided at the bottom end of the connecting shell (11); a position sensor (16) is embedded in the inner wall of the connecting shell (11); the slider (20) is slidably connected to the surface of the position sensor (16); the position of the slider (20) is obtained through the position sensor (16); a first spring (18) is provided in the connecting shell (11); two ends of the first spring (18) are fixedly connected to the bottom end of the slider (20) and the inner side of the bottom end of the connecting shell (11); The vertical distance from the left first pulley (4) to the left vehicle bridge (8) is L1, and the vertical distance from the right first pulley (4) to the left vehicle bridge (8) is L2; The axle load distribution detection component comprises a telescopic cylinder (13) and a third pulley (24) which are rotatably connected to the monitoring box (6) via a rotating shaft in the middle position of the monitoring box (6); the third pulley (24) is fixed to the inner side of the bottom end of the monitoring box (6); the rotation center of the telescopic cylinder (13) is at the center position of the telescopic cylinder (13); the two ends of the telescopic cylinder (13) are respectively facing two pistons (30); the piston (30) is connected to one end of the telescopic cylinder (13) on this side via an elastic component; when L2 is different from L1, the two pistons (30) move asynchronously, the pulling forces of the elastic components on both sides are different, and the telescopic cylinder (13) is tilted to show the axle load distribution of the vehicle.

2. The intelligent monitoring device for axle load of a semitrailer according to claim 1 is characterized in that: Both ends of the telescopic cylinder (13) are slidably connected to a slide rod (27) for performing a distance compensation function, a fourth spring (28) is arranged on the outside of the slide rod (27), and both ends of the fourth spring (28) are respectively fixedly connected to the inner side of one end of the telescopic cylinder (13) and the inner side of one end of the slide rod (27).

3. The intelligent monitoring device for axle load of a semitrailer according to claim 2 is characterized in that: A tilt sensor (26) is fixedly connected to the center position of the top end of the telescopic cylinder (13), and the tilt sensor (26) is used to obtain the tilt of the telescopic cylinder (13).

4. The intelligent monitoring device for axle load of a semitrailer according to claim 3 is characterized in that: The elastic component is an elastic rope (29), which is wound around the third pulley (24) and has two ends fixedly connected to one end of the piston (30) and one end of the side sliding rod (27), respectively.

5. The intelligent monitoring device for axle load of a semitrailer according to claim 4 is characterized in that: The elastic component comprises a limit rod (14) and a fourth pulley (25). The limit rod (14) is fixed on the inner side of the monitoring box (6) up and down. The fourth pulley (25) is also fixed on the inner side of the bottom end of the monitoring box (6) and is flush with the third pulley (24). The third pulley (24) and the fourth pulley (25) are respectively distributed on both sides of the limit rod (14). The outer side of the limit rod (14) is slidably connected to a lifting block (21). One end of the lifting block (21) is fixedly connected to the second pulley (22). The outer side of the limit rod (14) is provided with a third spring (23). The two ends of the third spring (23) are respectively fixedly connected to the bottom end of the monitoring box (6) and the bottom end of the lifting block (21).

6. The intelligent monitoring device for axle load of a semitrailer according to claim 5, characterized in that: One end of the piston (30) is fixedly connected to a second pull rope (15), and the second pull rope (15) is fixedly connected to one end of the side sliding rod (27) after passing through the fourth pulley (25), the second pulley (22) and the third pulley (24) in sequence.

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