A semi-trailer active safety control reminder device

Abstract

The present invention relates to the field of active safety technologies for semi-trailers, and particularly to an active safety control and reminder device for a semi-trailer, including an alarm in the vehicle floor and the vehicle head. The upper surface of the vehicle floor is fixedly connected with two touch-sensitive switches, and the distance between the two touch-sensitive switches is L. One side of the vehicle floor close to the vehicle head is slidably connected with a sliding plate, and the top of the sliding plate is rotatably connected with a first roller and a second roller. After the cylindrical article rolls between the first roller and the second roller, it can be lifted by the first roller and the second roller. With the above settings, the present invention can effectively prevent the cylindrical article from moving towards the vehicle head direction, providing relatively safe protection and reminder for the semi-trailer. When the semi-trailer loaded with heavy cylindrical articles brakes, when the cylindrical article breaks through its original fixing components under the action of inertia and passes through the touch-sensitive switch, the present invention can continuously consume the potential energy of the forward movement of the cylindrical article through its own rotation.

Description

Technical Field

[0001] The present invention relates to the technical field of active safety for semi-trailers, and specifically to an active safety control and reminder device for semi-trailers. Background Technique

[0002] When a semi-trailer transports cylindrical items, such as steel coils, as Figure 1 shown, because it is necessary to consider the hoisting during loading and unloading and the wear characteristics of the items, sometimes the rolling surface of the cylindrical item must be used as the supporting surface;

[0003] In the above situation, in order to prevent the cylindrical item from moving during transportation, the cylindrical item is often fixed on the vehicle floor. However, when the semi-trailer brakes suddenly and the cylindrical item is heavy, some single steel coils can weigh up to 8 tons. Under the action of inertia, the existing fixing components of the cylindrical item are difficult to bear the inertial force, and the cylindrical item will move forward, even squeezing the cab, causing injuries to the cab personnel. Therefore, an active safety control and reminder device for semi-trailers is proposed for the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an active safety control and reminder device for semi-trailers to solve the problem of "when the semi-trailer brakes suddenly and the cylindrical item is heavy, under the action of inertia, the existing fixing components of the cylindrical item are difficult to bear the inertial force, and the cylindrical item will move forward, even squeezing the cab, causing injuries to the cab personnel" proposed in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An active safety control and reminder device for semi-trailers, including an alarm in the vehicle floor and the cab. Two touch-sensitive switches are fixedly connected to the upper surface of the vehicle floor, and the distance between the two touch-sensitive switches is L. One side of the vehicle floor close to the cab is slidably connected with a sliding plate. The top of the sliding plate is rotatably connected with a first roller and a second roller. After the cylindrical item rolls between the first roller and the second roller, it can be suspended by the first roller and the second roller;

[0006] One side of the sliding plate is fixedly connected with a second motor. The end of the main shaft of the second motor is fixedly connected with the first roller. The first roller can be driven by the second motor. A rubber ring is sleeved on the outer side of the first roller. One side of the vehicle floor close to the cab is fixedly connected with a damping rod. The movable end of the damping rod is a top rod, and the top rod is fixedly connected with the sliding plate.

[0007] Under the above settings, the present invention can effectively prevent the movement of the cylindrical item towards the cab when the semi-trailer loaded with heavy cylindrical items brakes, providing relatively safe protection and reminder for the semi-trailer;

[0008] When a semi-trailer loaded with heavy cylindrical objects brakes, when the cylindrical objects break through its original fixing components under the action of inertia and pass through the touch-sensitive switch, the present invention can continuously consume the potential energy of the cylindrical objects through its own rotation, thereby playing a role of safety protection. When the cylindrical objects break through its original fixing components under the action of inertia and pass through the touch-sensitive switch, the alarm in the front cockpit will sound an alarm to play a role of reminder.

[0009] When the cylindrical object breaks through its original fixing assembly under the action of inertia and passes through the touch-sensitive switch, because the distance between the two touch-sensitive switches in the present invention is L, when the cylindrical object passes through the two touch-sensitive switches successively, we can obtain the time T required for the cylindrical object to pass through the two touch-sensitive switches, that is, we can obtain the linear velocity V1=L / T of the outer surface of the cylindrical object when it rolls forward;

[0010] After obtaining the linear velocity V1 of the outer surface of the tubular article when it rolls forward, the second motor is controlled to rotate, and the rotation of the second motor drives the first roller to rotate, and the tubular article is controlled to rotate between the first roller and the second roller, and the linear velocity V2 of the outer surface of the first roller is controlled by the second motor, and V2 is always slightly smaller than V1. This setting prevents the tubular article from rolling forward over the first roller due to a relatively large linear velocity, and on the other hand, the inertia force of the tubular article is continuously consumed under the action of the second motor, thereby effectively preventing the consequences of the tubular article rolling forward;

[0011] As a preferred active safety control reminder device for a semi-trailer of the present invention, a slide groove is provided on the side of the slide plate away from the front of the vehicle, a support plate is slidably connected to the inner side of the slide groove, the top of the support plate is rotatably connected to the second roller through a rotating shaft, a spring is fixedly connected between the bottom end of the support plate and the inner side of the bottom end of the slide groove, and after the slide plate drops to the bottommost end, the second roller can be flush with the first roller.

[0012] Under the above setting, the second roller provided in the present invention is in a protruding state in the initial state. When the cylindrical object rolls forward, the elastic force of the spring is overcome to make the second roller move downward, and finally the second roller can be flush with the first roller to support the cylindrical object. The provided spring plays the first buffering and deceleration role.

[0013] As a preferred active safety control reminder device for a semi-trailer of the present invention, a transmission box is fixedly connected to one or both sides of the slide plate, a worm gear is rotatably connected to the inner side of the transmission box, a baffle is fixedly connected to the outer side of the rotating shaft of the worm gear, and the baffle can be tilted upward to block the cylindrical objects.

[0014] Preferably, as a semi-trailer active safety control reminder device of the present invention, a third roller is rotatably connected to the top end of the baffle through a rotating shaft, and the first roller, the second roller and the third roller can realize three-point limit of the cylindrical article.

[0015] Preferably, as a semi-trailer active safety control reminder device of the present invention, a first motor is fixedly connected to one side of the transmission box, a worm is fixedly connected to the end of the main shaft of the first motor, and the worm is meshed with a worm gear. By rotating the first motor, the baffle can be rotated upward or downward. After the baffle rotates downward to the limit, it can be placed flat on the upper side of the vehicle floor.

[0016] Under the above settings, in order to further block the cylindrical article, the present invention also provides a baffle. The baffle can be tilted upward to block the cylindrical article. When the cylindrical article passes through the first touch-sensitive switch, the first motor drives the worm to rotate. The rotation of the worm will drive the worm gear to rotate, and the rotation of the worm gear can realize the upward or downward rotation of the baffle. After the baffle rotates upward, the third roller rotatably connected to the top end of the baffle through a rotating shaft, the first roller and the second roller can realize three-point limit of the cylindrical article. After the baffle rotates downward to the limit, it can be placed flat on the upper side of the vehicle floor, which is convenient for the semi-trailer to pull other types of goods;

[0017] Preferably, as a semi-trailer active safety control reminder device of the present invention, a piston is slidably connected to the inner side of the damping rod. The outer side of the piston is slidably connected to the inner side of the damping rod. The left end of the piston is fixedly connected to the right end of the ejector rod, and the outer side of the ejector rod is slidably connected to the inner side of the damping rod.

[0018] Preferably, as a semi-trailer active safety control reminder device of the present invention, the piston divides the inner side of the damping rod into left and right sides. Both the left and right sides of the damping rod are filled with hydraulic oil. A circular plate is slidably connected to the inner side of the right end of the damping rod. An air cavity for realizing space compensation and reset is formed between the right end of the circular plate and the inner side of the right end of the damping rod, and the air cavity has an initial pressure.

[0019] Preferably, as a semi-trailer active safety control reminder device of the present invention, a through hole is formed in the inner side of the piston. When the ejector rod moves to the right, the hydraulic oil on the right side of the piston can enter the left side of the piston through the through hole.

[0020] Preferably, as a semi-trailer active safety control reminder device of the present invention, a fixed block is fixedly connected to the inner side of the right end of the damping rod, and a tapered rod is fixedly connected to the left end of the fixed block. The tapered rod passes through the through hole.

[0021] Preferably, for a semi-trailer active safety control and reminder device of the present invention, the cross-sectional diameter on the left side of the tapered rod is smaller than that on the right side. During the process of the piston moving to the right, due to the change in the cross-sectional diameter of the tapered rod, the flow aperture of the through hole gradually becomes smaller, thereby achieving a rapid increase in the damping of the damping rod.

[0022] Under the above settings, the present invention also has a third layer of insurance to maximize the avoidance of the risk brought by the forward rolling of cylindrical objects. The present invention is provided with a damping rod, which can further play a role in decelerating and buffering the cylindrical object. And as the deceleration stroke increases, the damping rod can provide a greater damping force. On the one hand, within the first half of the stroke of the damping rod, the inertial force can be effectively released. On the other hand, within the second half of the stroke of the damping rod, it mainly plays a role in blocking, and increasing the damping force plays a role in blocking. When the cylindrical object drives the sliding plate to move to the right, the ejector rod in the damping rod moves to the right, and the hydraulic oil on the right side of the piston can enter the left side of the piston through the through hole. And because the cross-sectional diameter on the left side of the tapered rod is smaller than that on the right side, during the process of the piston moving to the right, due to the change in the cross-sectional diameter of the tapered rod, the flow aperture of the through hole gradually becomes smaller, thereby achieving a rapid increase in the damping of the damping rod, and thus achieving more effective buffering and force dissipation.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. For the semi-trailer active safety control and reminder device, the present invention can effectively prevent the movement of cylindrical objects in the direction of the vehicle head when the semi-trailer loaded with heavy cylindrical objects brakes, providing relatively safe protection and reminder for the semi-trailer. When the semi-trailer loaded with heavy cylindrical objects brakes, when the cylindrical object breaks through its original fixing components under the action of inertia and passes through the touch-sensitive switch, the present invention can continuously consume the potential energy of the forward movement of the cylindrical object through its own rotation, thereby playing a role in safety protection. When the cylindrical object breaks through its original fixing components under the action of inertia and passes through the touch-sensitive switch, the alarm in the vehicle head cockpit will give an alarm to play a reminder role.

[0025] 2. For this semi-trailer active safety control reminder device, when a cylindrical object breaks through its original fixing components under the action of inertia and passes through the touch-sensitive switch, since the distance between the two touch-sensitive switches in the present invention is L, when the cylindrical object passes through the two touch-sensitive switches successively, we can obtain the time T required for the cylindrical object to pass through the two touch-sensitive switches, that is, we can obtain the linear velocity V1 of the outer surface of the cylindrical object when it rolls forward, V1 = L / T. After obtaining the linear velocity V1 of the outer surface of the cylindrical object when it rolls forward, control the second motor to rotate. The rotation of the second motor drives the first roller to rotate, and control the cylindrical object to rotate between the first roller and the second roller. By the linear velocity V2 of the outer surface of the first roller of the second motor, control V2 to be always slightly less than V1. This setting can, on the one hand, prevent the cylindrical object from rolling forward over the first roller due to a relatively large linear velocity, and on the other hand, continuously consume the inertial force of the cylindrical object under the action of the second motor, so as to effectively prevent the consequences brought by the forward rolling of the cylindrical object.

[0026] 3. For this semi-trailer active safety control reminder device, the second roller set in the present invention is in a protruding state in the initial state. When the cylindrical object rolls forward, it will overcome the elastic force of the spring and make the second roller move downward, and finally make the second roller flush with the first roller to support the cylindrical object. The set spring plays a role of the first buffer deceleration.

[0027] 4. For this semi-trailer active safety control reminder device, in order to ensure further blocking of the cylindrical object, the present invention also sets a baffle. The baffle can tilt upward to block the cylindrical object. After the cylindrical object passes through the first touch-sensitive switch, the first motor drives the worm to rotate. The rotation of the worm will drive the worm wheel to rotate. The rotation of the worm wheel can realize the upward or downward rotation of the baffle. After the baffle rotates upward, the third roller rotatably connected to the top of the baffle through a rotating shaft, and the first roller and the second roller can realize three-point limit of the cylindrical object. After the baffle rotates downward to the limit, it can be placed flat.

[0028] 5. For this semi-trailer active safety control reminder device, the present invention also has a third layer of insurance to maximize the avoidance of risks brought by the forward rolling of cylindrical objects. The present invention is provided with a damping rod, which can further play a role in decelerating and buffering the cylindrical objects. And as the deceleration stroke increases, the damping rod can provide a greater damping force. On the one hand, within the first half of the stroke of the damping rod, the inertial force can be effectively released. On the other hand, within the second half of the stroke of the damping rod, it mainly plays a role in blocking, increasing the damping force to play a blocking role. When the cylindrical object drives the sliding plate to move to the right, the ejector rod in the damping rod moves to the right, and the hydraulic oil on the right side of the piston can enter the left side of the piston through the through hole. And because the cross-sectional diameter on the left side of the tapered rod is smaller than that on the right side, during the process of the piston moving to the right, due to the change in the cross-sectional diameter of the tapered rod, the flow diameter of the through hole gradually becomes smaller, thereby realizing the rapid increase of the damping of the damping rod and achieving more effective buffer force release. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall sectional structure of the present invention;

[0030] Figure 2 For the present invention Figure 1 schematic diagram of the structure at position A;

[0031] Figure 3 is a schematic diagram of the external structure at the sliding plate of the present invention;

[0032] Figure 4 is a schematic diagram of the sectional installation structure inside the sliding plate of the present invention;

[0033] Figure 5 is a schematic diagram of the structure when the cylindrical object enters between the first roller and the second roller of the present invention;

[0034] Figure 6 is a schematic diagram of the installation structure inside the transmission box of the present invention;

[0035] Figure 7 is a schematic diagram of the external structure inside the damping rod of the present invention;

[0036] Figure 8 is a schematic diagram of the external structure at the first roller of the present invention;

[0037] Figure 9 is a schematic diagram of the external structure at the tapered rod of the present invention;

[0038] Figure 10 For the present invention Figure 7 schematic diagram of the installation structure at position B.

[0039] In the figure: 1. vehicle board; 2. cylindrical article; 3. first roller; 31. rubber ring; 4. baffle; 5. third roller; 6. damping rod; 7. sliding plate; 8. touch-sensitive switch; 9. first motor; 10. second roller; 11. transmission case; 12. spring; 13. worm; 14. worm gear; 15. fixing block; 16. tapered rod; 17. circular plate; 18. air chamber; 19. ejector rod; 20. through hole; 21. piston; 22. second motor; 23. transmission case. Specific implementation mode

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Example 1, please refer to Figures 1 - 5 and Figure 8 , the present invention provides a technical solution: a semi-trailer active safety control reminder device, including a vehicle board 1 and an alarm in the vehicle head. Two touch-sensitive switches 8 are fixedly connected to the upper surface of the vehicle board 1. The distance between the two touch-sensitive switches 8 is L. A sliding plate 7 is slidably connected to one side of the vehicle board 1 close to the vehicle head. The top end of the sliding plate 7 is rotatably connected to a first roller 3 and a second roller 10. After the cylindrical article 2 rolls between the first roller 3 and the second roller 10, it can be lifted by the first roller 3 and the second roller 10;

[0042] One side of the sliding plate 7 is fixedly connected to a second motor 22. The end of the main shaft of the second motor 22 is fixedly connected to the first roller 3. The first roller 3 can be driven by the second motor 22. A rubber ring 31 is sleeved outside the first roller 3. One side of the vehicle board 1 close to the vehicle head is fixedly connected to a damping rod 6. The movable end of the damping rod 6 is an ejector rod 19. The ejector rod 19 is fixedly connected to the sliding plate 7.

[0043] Under the above settings, the present invention can effectively prevent the movement of the cylindrical article 2 in the direction of the vehicle head when the semi-trailer loaded with heavy cylindrical articles 2 brakes, providing relatively safe protection and reminder for the semi-trailer;

[0044] When the semi-trailer loaded with heavy cylindrical articles 2 brakes, when the cylindrical article 2 breaks through its original fixing components under the action of inertia and passes through the touch-sensitive switch 8, the present invention can continuously consume the potential energy of the forward movement of the cylindrical article 2 through its own rotation, thereby playing a role in safety protection. At the same time, when the cylindrical article 2 breaks through its original fixing components under the action of inertia and passes through the touch-sensitive switch 8, the alarm in the vehicle head cockpit will give an alarm to play a reminder role;

[0045] When the cylindrical article 2 breaks through its original fixing component under the action of inertia and passes through the touch-sensitive switch 8, since the distance between the two touch-sensitive switches 8 in the present invention is L, when the cylindrical article 2 passes through the two touch-sensitive switches 8 successively, we can obtain the time T required for the cylindrical article 2 to pass through the two touch-sensitive switches 8, that is, we can obtain the linear velocity V1 of the outer surface of the cylindrical article 2 when it rolls forward, V1 = L / T;

[0046] After obtaining the linear velocity V1 of the outer surface of the cylindrical article 2 when it rolls forward, control the second motor 22 to rotate. The rotation of the second motor 22 drives the first roller 3 to rotate, and control the cylindrical article 2 to rotate between the first roller 3 and the second roller 10. By the linear velocity V2 of the outer surface of the first roller 3 of the second motor 22, control V2 to be always slightly less than V1. This setting can prevent the cylindrical article 2 from rolling forward relative to the larger linear velocity and crossing the first roller 3 on the one hand, and on the other hand, the inertial force of the cylindrical article 2 is continuously consumed under the action of the second motor 22, so as to effectively prevent the consequences brought by the forward rolling of the cylindrical article 2;

[0047] Specifically, a chute is provided on the side of the skateboard 7 away from the vehicle head. A support plate 11 is slidably connected to the inner side of the chute. The top end of the support plate 11 is rotatably connected to the second roller 10 through a rotating shaft. A spring 12 is fixedly connected between the bottom end of the support plate 11 and the inner side of the bottom end of the chute. After the skateboard 7 descends to the lowest end, the second roller 10 can be flush with the first roller 3.

[0048] Under the above settings, the second roller 10 provided in the present invention is in a protruding state in the initial state. When the cylindrical article 2 rolls forward, it will overcome the elastic force of the spring 12 and cause the second roller 10 to move downward, and finally the second roller 10 can be flush with the first roller 3 to support the cylindrical article 2. The provided spring 12 plays a role of the first buffer deceleration.

[0049] Example 2, please refer to Figures 1 - 6 and Figure 8 , this embodiment is a further improvement of Embodiment 1. The same parts will not be described in detail. The difference is that a transmission box 23 is fixedly connected to one side or both sides of the skateboard 7. A worm gear 14 is rotatably connected to the inside of the transmission box 23. A baffle 4 is fixedly connected to the outer side of the rotating shaft of the worm gear 14. The baffle 4 can tilt upward to block the cylindrical article 2.

[0050] Specifically, the top end of the baffle 4 is rotatably connected to a third roller 5 through a rotating shaft. The first roller 3, the second roller 10 and the third roller 5 can realize three-point limit of the cylindrical article 2.

[0051] Specifically, a first motor 9 is fixedly connected to one side of the transmission case 23. The end of the main shaft of the first motor 9 is fixedly connected to a worm 13. The worm 13 meshes with a worm wheel 14. By rotating the first motor 9, the baffle 4 can be rotated upward or downward. After the baffle 4 rotates downward to the limit, it can be placed flat on the upper side of the vehicle floor 1.

[0052] Under the above settings, in order to further block the cylindrical article 2, the present invention also provides a baffle 4. The baffle 4 can be tilted upward to block the cylindrical article 2. When the cylindrical article 2 passes through the first touch-sensitive switch 8, the first motor 9 drives the worm 13 to rotate. The rotation of the worm 13 drives the worm wheel 14 to rotate. The rotation of the worm wheel 14 can rotate the baffle 4 upward or downward. After the baffle 4 rotates upward, the third roller 5 rotatably connected to the top end of the baffle 4 through a rotating shaft, and the first roller 3 and the second roller 10 can achieve three-point limit of the cylindrical article 2. After the baffle 4 rotates downward to the limit, it can be placed flat on the upper side of the vehicle floor 1, which is convenient for the semi-trailer to pull other types of goods;

[0053] Embodiment 2, please refer to Figures 1 - 10 , this embodiment is a further improvement of Embodiment 2. The same parts will not be described in detail. The differences are as follows: A piston 21 is slidably connected to the inner side of the damping rod 6. The outer side of the piston 21 is slidably connected to the inner side of the damping rod 6. The left end of the piston 21 is fixedly connected to the right end of the ejector rod 19. The outer side of the ejector rod 19 is slidably connected to the inner side of the damping rod 6.

[0054] Specifically, the piston 21 divides the inner side of the damping rod 6 into left and right sides. Hydraulic oil is filled on both the left and right sides of the damping rod 6. A circular plate 17 is slidably connected to the inner side of the right end of the damping rod 6. An air cavity 18 for realizing space compensation and reset is formed between the right end of the circular plate 17 and the inner side of the right end of the damping rod 6. The air cavity 18 has an initial pressure.

[0055] Specifically, a through hole 20 is opened in the inner side of the piston 21. When the ejector rod 19 moves to the right, the hydraulic oil on the right side of the piston 21 can enter the left side of the piston 21 through the through hole 20.

[0056] Specifically, a fixing block 15 is fixedly connected to the inner side of the right end of the damping rod 6. A tapered rod 16 is fixedly connected to the left end of the fixing block 15. The tapered rod 16 passes through the through hole 20.

[0057] Specifically, the cross-sectional diameter of the left side of the tapered rod 16 is smaller than that of the right side. During the process of the piston 21 moving to the right, due to the change in the cross-sectional diameter of the tapered rod 16, the flow diameter of the through hole 20 gradually becomes smaller, thereby realizing a rapid increase in the damping of the damping rod 6.

[0058] Under the above settings, the present invention is further provided with a triple insurance to maximize the avoidance of the risk brought by the forward rolling of the cylindrical article 2. The present invention is provided with a damping rod 6, and the damping rod 6 can further play a role in decelerating and buffering the cylindrical article 2. Moreover, as the deceleration stroke increases, the damping rod 6 can provide a greater damping force. On the one hand, within the front stroke of the damping rod 6, the inertial force can be effectively released. On the other hand, within the latter half of the stroke of the damping rod 6, it mainly acts as a block, and the increased damping force plays a blocking role. When the cylindrical article 2 drives the sliding plate 7 to move to the right, the ejector rod 19 in the damping rod 6 moves to the right, and the hydraulic oil on the right side of the piston 21 can enter the left side of the piston 21 through the through hole 20. And because the cross-sectional diameter of the left side of the tapered rod 16 is smaller than that of the right side, during the process of the piston 21 moving to the right, due to the change in the cross-sectional diameter of the tapered rod 16, the flow diameter of the through hole 20 gradually becomes smaller, thereby realizing a rapid increase in the damping of the damping rod 6 and thus achieving more effective buffering and force relief.

[0059] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An active safety control reminder device for a semi-trailer, comprising a vehicle floor (1) and an alarm in the vehicle head, characterized in that: Two touch switches (8) are fixedly connected to the upper surface of the vehicle board (1). The distance between the two touch switches (8) is L. A sliding board (7) is slidably connected to one side of the vehicle board (1) close to the vehicle head. The top end of the sliding board (7) is rotatably connected to a first roller (3) and a second roller (10). After the cylindrical article (2) rolls between the first roller (3) and the second roller (10), it can be suspended by the first roller (3) and the second roller (10). A second motor (22) is fixedly connected to one side of the sliding board (7). The end of the main shaft of the second motor (22) is fixedly connected to the first roller (3). The first roller (3) can be driven by the second motor (22). A rubber ring (31) is sleeved outside the first roller (3). A damping rod (6) is fixedly connected to one side of the vehicle board (1) close to the vehicle head. The movable end of the damping rod (6) is a push rod (19). The push rod (19) is fixedly connected to the sliding board (7). When the semi-trailer brakes, the cylindrical article (2) breaks through its original fixing components under the action of inertia. After the cylindrical article (2) passes through the touch switches (8) in sequence, the linear velocity of the outer surface of the cylindrical article (2) when it rolls forward is obtained, and the second motor (22) is controlled to rotate. The rotation of the second motor (22) drives the first roller (3) to rotate, and the rotation of the cylindrical article (2) between the first roller (3) and the second roller (10) is controlled, so that the inertia force of the cylindrical article (2) is continuously consumed under the action of the second motor (22), effectively preventing the cylindrical article (2) from continuing to roll forward.

2. The active safety control reminder device for a semi-trailer according to claim 1, characterized in that: A chute is formed in one side of the sliding board (7) away from the vehicle head. A support board (11) is slidably connected to the inner side of the chute. The top end of the support board (11) is rotatably connected to the second roller (10) through a rotating shaft. A spring (12) is fixedly connected between the bottom end of the support board (11) and the inner side of the bottom end of the chute. After the sliding board (7) descends to the lowest end, the second roller (10) can be flush with the first roller (3).

3. The active safety control reminder device for a semi-trailer according to claim 2, wherein: A transmission box (23) is fixedly connected to one side or both sides of the sliding board (7). A worm gear (14) is rotatably connected to the inner side of the transmission box (23). A baffle (4) is fixedly connected to the outer side of the rotating shaft of the worm gear (14). The baffle (4) can tilt upward to block the cylindrical article (2).

4. The active safety control and reminder device for a semi-trailer according to claim 3, characterized in that: The top end of the baffle (4) is rotatably connected to a third roller (5) through a rotating shaft. The first roller (3), the second roller (10) and the third roller (5) can realize three-point limit on the cylindrical article (2).

5. The active safety control reminder device for a semi-trailer according to claim 4, characterized in that: A first motor (9) is fixedly connected to one side of the transmission box (23). The end of the main shaft of the first motor (9) is fixedly connected to a worm (13). The worm (13) is meshed with the worm gear (14). By rotating the first motor (9), the baffle (4) can be rotated upward or downward. After the baffle (4) rotates downward to the limit, it can be placed flat on the upper side of the vehicle board (1).

6. A semi-trailer active safety control reminder device according to any one of claims 1-5, characterized in that: A piston (21) is slidably connected to the inner side of the damping rod (6). The outer side of the piston (21) is slidably connected to the inner side of the damping rod (6). The left end of the piston (21) is fixedly connected to the right end of the ejector rod (19). The outer side of the ejector rod (19) is slidably connected to the inner side of the damping rod (6).

7. The active safety control reminder device for a semi-trailer according to claim 6, characterized in that: The piston (21) divides the inner side of the damping rod (6) into left and right sides. Hydraulic oil is filled on both the left and right sides of the damping rod (6). A circular plate (17) is slidably connected to the inner side of the right end of the damping rod (6). An air cavity (18) for achieving space compensation and reset is formed between the right end of the circular plate (17) and the inner side of the right end of the damping rod (6). The air cavity (18) has an initial pressure.

8. The active safety control reminder device for a semi-trailer according to claim 7, wherein: A through hole (20) is formed in the inner side of the piston (21). When the ejector rod (19) moves to the right, the hydraulic oil on the right side of the piston (21) can enter the left side of the piston (21) through the through hole (20).

9. The active safety control reminder device for a semi-trailer according to claim 8, characterized in that: A fixed block (15) is fixedly connected to the inner side of the right end of the damping rod (6). A tapered rod (16) is fixedly connected to the left end of the fixed block (15). The tapered rod (16) passes through the through hole (20).

10. The active safety control reminder device for a semi-trailer according to claim 9, characterized in that: The cross-sectional diameter of the left side of the tapered rod (16) is smaller than that of the right side. During the process of the piston (21) moving to the right, due to the change in the cross-sectional diameter of the tapered rod (16), the flow diameter of the through hole (20) gradually becomes smaller, thereby realizing a rapid increase in the damping of the damping rod (6).

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