Safety transport device for airport pavement construction to restrain emergency stop inertia

Abstract

The application discloses an airport pavement construction safety transportation device for restraining emergency stop inertia, and relates to the technical field of transportation vehicles, which comprises a base, a carriage, a driving mechanism, a brake mechanism, a storage battery, a controller, an emergency stop inertia control mechanism and a sensor assembly. The lower end of the base is provided with the driving mechanism. The driving mechanism is provided with the brake mechanism and the emergency stop inertia control mechanism. The upper end of the base is provided with the carriage. The front end of the base is provided with the sensor assembly. The controller and the storage battery are fixedly connected with the base respectively. The controller is electrically connected with the driving mechanism, the brake mechanism, the emergency stop inertia control mechanism, the sensor assembly and the storage battery through wires respectively. The rear end of the base is provided with a driven guide wheel. The upper end of the driven guide wheel is connected with a handle through a rotating shaft. The application can effectively reduce the falling risk caused by emergency stop inertia.

Description

Technical Field

[0001] This invention relates to the field of transport vehicle technology, and more specifically to a safe transport device for airport pavement construction that counteracts the inertia of sudden stops. Background Technology

[0002] Airport pavement construction often involves transporting various prefabricated components and building materials, typically using electric handcarts. Electric handcarts are convenient to operate, saving time and effort, and providing great convenience for small-scale material handling. However, while convenient, they also pose significant safety hazards, with frequent accidents caused by electric handcarts failing to stop in time at air-to-air locations.

[0003] The main reasons for the above accidents are as follows:

[0004] 1. The operator has blind spots and cannot slow down in time when approaching an open area;

[0005] 2. Despite an emergency stop upon discovering the approaching airspace, the vehicle still crashed due to its inertia.

[0006] Based on the above two points, improving the intelligence level of electric handcarts and timely identification of their location in the air is one of the necessary means to avoid falling accidents. In addition, when the vehicle stops suddenly, how to overcome inertia and enable the handcart to stop with the shortest displacement is a key means in the event of a crisis. Summary of the Invention

[0007] This invention provides a safe transportation device for airport pavement construction that counteracts the inertia of sudden stops, with the aim of solving the problems described in 1 and 2 of the prior art.

[0008] To solve the above problems, the technical solution of the present invention is as follows:

[0009] A safe transport device for airport pavement construction that counteracts the inertia of sudden stops includes a base, a carriage, a drive mechanism, a braking mechanism, a battery, a controller, an emergency stop inertia control mechanism, and a sensor assembly. The drive mechanism is located at the lower end of the base, and the drive mechanism is equipped with the braking mechanism and the emergency stop inertia control mechanism. The carriage is located at the upper end of the base, and the sensor assembly is located at the front end of the base. The controller and the battery are fixedly connected to the base. The controller is electrically connected to the drive mechanism, the braking mechanism, the emergency stop inertia control mechanism, the sensor assembly, and the battery through wires. A driven guide wheel is located at the rear end of the base, and a handle is connected to the upper end of the driven guide wheel through a rotating shaft.

[0010] Preferably, the drive mechanism includes a drive motor, a drive pulley, a driven pulley, a transmission belt, a first mounting plate, a second mounting plate, a main shaft, and a fixed wheel. First mounting plates are fixedly mounted on the left and right ends of the lower surface of the base, and a main shaft is rotatably connected between the two first mounting plates. A fixed wheel is fixedly connected to the main shaft at the inner ends of the two first mounting plates. A driven pulley is fixedly mounted in the middle of the main shaft. Two second mounting plates are arranged opposite each other on the lower surface of the base, and a drive pulley is rotatably connected between the two second mounting plates. A drive motor is fixedly mounted on the outer side of one of the second mounting plates. The output shaft of the drive motor rotatably passes through the second mounting plate and is fixedly connected to the axle of the drive pulley. The drive pulley and the driven pulley are connected by a transmission belt. The braking mechanism is a power-off electromagnetic brake connected to the main shaft. The power-off electromagnetic brake is electrically connected to a switch. The switch and the drive motor are electrically connected to a controller via wires.

[0011] Preferably, the emergency stop inertia control mechanism includes a counterweight beam, a chain rake release device, a shock absorber, a control box, and driven wheels. The main shaft extends outwards through the first mounting plate and is rotatably connected to driven wheels at both ends. A control box is fixedly connected to the base side of the driven wheels. A guide box is fixedly connected to the lower front side of the control box. The chain rake release device includes a winding roller rotatably connected to the rear end of the control box. The roller shaft of the winding roller is connected to the inner wall of the control box via a torsion spring. A chain rake is wound on the winding roller, and the end of the chain rake runs along a pre-set path on the side wall of the control box and the side wall of the guide box. The guide rail mechanism outputs outwards. The control box, located on the inner wall of the upper opening of the guide box, has a drive shaft running left-right. The drive shaft is rotatably connected to the side wall of the control box. A rotary motor is mounted on the outer wall of the control box, and the output shaft of the rotary motor passes through the side wall of the control box and is fixedly connected to the end of the drive shaft. The chain rake includes two parallel chains and several parallel steel plates. Each outer link of the chain is fixedly mounted with an attachment plate structure via a pin. The attachment plate structure is fixedly connected to the steel plates. Two sprockets are fixedly connected to the outer wall of the drive shaft. The sprockets and the chain drive... The guide box is open at the bottom, and after the chain rake is output, it is opposite to the driven wheel and pressed against the ground by the driven wheel. The torsion spring has the following elasticity: under the standard load of the carriage, when the torsion spring contracts to a set amplitude, it can drive the roller to rotate in the opposite direction and pull the chain rake back. During the retraction of the chain rake, it pulls the driven wheel to reverse and moves the handcart backward a certain distance. The configuration of the rotating motor is such that it can output the chain rake downward to a set length by rotating the sprocket. The set length refers to the length at which the chain rake can be pressed and fixed by the bottom end of the driven wheel and the driven wheel pressed against the ground. The contact surface is covered. When the driven wheel presses the chain rake, the rotating motor is de-energized and the lock on the output shaft is released. The chain rake generates a downward pulling force on the handcart body, causing the handcart body to trip and preventing it from continuing to move forward due to inertia. A shock absorber is fixedly connected to the base at the front end of the guide box. A counterweight beam is configured at the rear of the base. The shock absorber is configured to buffer the head of the handcart body when the tripping action occurs. The weight of the counterweight beam is sufficient to promote the handcart body to restore balance when the tripping action occurs. During this process, the chain rake retracts and the handcart body moves backward.

[0012] Preferably, the chain is a rigid chain in which only the chain body curls backward.

[0013] Preferably, the front end of the base is fixedly connected to a horizontally arranged U-shaped seat, and the two free ends of the U-shaped seat are respectively fixedly connected to the front end of the base. The shock absorber includes a mounting base fixedly disposed at the bottom of the two free ends of the U-shaped seat. A sleeve is fixedly connected to the bottom end of the mounting base along the longitudinal direction. A support rod is slidably connected inside the sleeve. The bottom end of the support rod extends out of the sleeve and is fixedly connected to a pressure foot. A compression spring is connected between the top end of the support rod and the top end inside the sleeve. The height of the bottom end of the pressure foot is higher than the height of the bottom end of the driven wheel. The driven wheel and the fixed wheel have the same shape and size. The counterweight beam is fixedly connected to the rear part of the lower surface of the base in the left-right direction.

[0014] Preferably, the sensor assembly includes laser rangefinders located on the upper and lower sides of the left and right ends of the front of the U-shaped base. The laser rangefinders are electrically connected to the controller via wires. The controller is also electrically connected to an alarm, which is fixedly connected to the handle.

[0015] Preferably, the sensor assembly further includes infrared sensors disposed at the front end and side of the U-shaped base, and the infrared sensors are electrically connected to the controller via wires.

[0016] Preferably, the sensor assembly further includes a vision sensor located at the front of the vehicle body, the vision sensor being electrically connected to the controller via a wire.

[0017] Preferably, the driven guide wheel is connected to a rotating shaft at its upper end, the rotating shaft passes through the rear end of the base and is rotatably connected to the base, the top end of the rotating shaft is connected to a handle, the upper end of the handle is fixedly connected to a control panel, and the control panel is electrically connected to the controller via a wire.

[0018] The present invention provides a safe transportation device for airport pavement construction that overcomes the inertia of sudden stops, which has the following beneficial effects:

[0019] 1. This invention can identify potentially airborne areas in advance using a visual sensor and slow down the vehicle beforehand. When approaching an airborne area, it can identify the area using a first laser rangefinder and a second laser rangefinder, effectively avoiding the risk of the vehicle and personnel falling from the air due to blind spots.

[0020] 2. By setting up an emergency stop inertia control mechanism, this invention can convert the forward lurch caused by inertia into a tripping motion of the vehicle body in place, and quickly restore the balance of the vehicle body through the cooperation of shock absorbers and counterweight beams. The vehicle body moves backward by retracting the chain rake. Therefore, it can solve the problem of the risk of the vehicle body lurching forward and falling due to emergency stop inertia. Attached Figure Description

[0021] Figure 1 A side view of the structure of the present invention (partial cross-section);

[0022] Figure 2 A top view of the structure of the present invention;

[0023] Figure 3 A front view schematic diagram of the sensor assembly and shock absorber of the present invention;

[0024] Figure 4 A schematic diagram of the front view of the present invention after removing the U-shaped base;

[0025] Figure 5 A schematic diagram of the chain rake of the present invention;

[0026] Figure 6 A partial structural diagram of the chain rake moving within the control box of the present invention;

[0027] 1: Base; 2: Carriage; 3: Driven guide wheel; 4: Shaft; 5: Handle; 6: Counterweight beam; 7: U-shaped seat; 8: First laser rangefinder sensor; 9: Second laser rangefinder sensor; 10: Infrared sensor; 11: Vision sensor; 12: Control box; 13: Winding roller; 14: Chain rake; 14-1: Chain; 14-2: Steel plate; 14-3: Auxiliary plate structure; 15: Guide rail mechanism; 16: Sprocket; 17: Torsion spring; 18: Drive pulley; 19: Drive motor; 20: Main shaft; 21: Driven wheel; 22: Mounting seat; 23: Sleeve; 24: Compression spring; 25: Support rod; 26: Presser foot; 27: Control panel; 28: Fixed wheel; 29: Driven pulley; 30: Transmission belt; 31: Guide box. Detailed Implementation

[0028] The following description provides a detailed explanation of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limiting this invention.

[0030] Example 1:

[0031] A safe transportation device for airport pavement construction that counteracts the inertia of sudden stops, such as... Figure 1-6As shown, the system includes a base 1, a carriage 2, a drive mechanism, a braking mechanism, a battery (not shown in the figure), a controller (not shown in the figure), an emergency stop inertial control mechanism, and a sensor assembly. The lower end of the base 1 is equipped with a drive mechanism, which includes a braking mechanism and an emergency stop inertial control mechanism. The upper end of the base 1 is equipped with a carriage 2, and the front end of the base 1 is equipped with a sensor assembly. The controller and the battery are fixedly connected to the base 1. The controller is electrically connected to the drive mechanism, the braking mechanism, the emergency stop inertial control mechanism, the sensor assembly, and the battery through wires. The rear end of the base 1 is equipped with a driven guide wheel 3, and the upper end of the driven guide wheel 3 is connected to a handle 5 through a rotating shaft 4.

[0032] In this embodiment, the function of the emergency stop inertia control mechanism is as follows: Normally, during an emergency stop, the handcart continues to move forward due to inertia. This could lead to a fall if the cart gets too close to an open area. The emergency stop inertia control mechanism changes the forward movement of the cart from a state of inertia to a tripping motion, preventing the cart from moving forward further and causing the front of the cart to bump downwards. At this point, the counterweight beam, chain rake release device, shock absorber, control box, and driven wheels work together to cushion the potential energy of the tripping motion and restore balance. The cart then moves backward a certain distance. This design avoids the risk of the cart sliding and falling due to being too close to an open area.

[0033] In this invention, the locations involved include, for example, elevator shafts, open side walls of buildings under construction, and foundation pits near roads. Because the operator of the electric handcart is located at the rear of the vehicle and has a blind spot, this invention also includes a sensor assembly to prevent the operator from failing to detect the risks associated with these locations due to their blind spot.

[0034] Example 2:

[0035] Based on Example 1, this example discloses: Figure 1-5As shown, the drive mechanism includes a drive motor 19, a driving pulley 18, a driven pulley 29, a transmission belt 30, a first mounting plate (not marked in the figure), a second mounting plate (not marked in the figure), a main shaft 20, and fixed wheels 28. The left and right ends of the lower surface of the base 1 are respectively fixed with first mounting plates. A main shaft 20 is rotatably connected between the two first mounting plates. Fixed wheels 28 are fixedly connected to the inner ends of the two first mounting plates on the main shaft 20. A driven pulley 29 is fixedly installed in the middle of the main shaft. Two second mounting plates are arranged opposite each other on the left and right sides of the lower surface of the base 1. A drive pulley 18 is rotatably connected to the main shaft 20. A drive motor 19 is fixedly mounted on the outer side of one of the second mounting plates. The output shaft of the drive motor 19 rotatably passes through the second mounting plate and is fixedly connected to the axle of the drive pulley 18. The drive pulley 18 and the driven pulley 29 are connected by a transmission belt 30. The braking mechanism is a power-off electromagnetic brake (a common technology, not shown in the figure) connected to the main shaft 20. The power-off electromagnetic brake is electrically connected to a switch (a common technology, not shown in the figure). The switch and the drive motor are electrically connected to the controller through wires.

[0036] In this embodiment, the drive motor is preferably a stepper motor, which drives the main shaft to rotate while simultaneously rotating the fixed wheel, thereby moving the vehicle body. During the rotation of the fixed wheel, the driven wheel also rotates.

[0037] Example 3:

[0038] Based on Example 2, such as Figure 1-6As shown, the emergency stop inertia control mechanism includes a counterweight beam 6, a chain rake release device, a shock absorber, a control box 12, and a driven wheel 21. The main shaft 20 extends outwards through the first mounting plate and is rotatably connected to the driven wheel 21 at both ends. The control box 12 is fixedly connected to the side of the base 1 above the driven wheel 21. A guide box 31 is fixedly connected to the lower front end of the control box 12. The chain rake release device includes a winding roller 13 rotatably connected to the rear end of the control box 12. The roller shaft of the winding roller 13 is connected to the inner wall of the control box 12 via a torsion spring 17. A chain rake 14 is wound on the winding roller 13, and the end of the chain rake 14 is pre-set along the side wall of the control box and the guide. The guide rail mechanism 15 on the side wall of the box outputs outward; the control box 12 is provided with a drive shaft on the inner wall of the upper opening of the guide box 31 in the left-right direction. The drive shaft is rotatably connected to the side wall of the control box. A rotary motor (not shown in the figure) is provided on the outer wall of the control box 12. The output shaft of the rotary motor passes through the side wall of the control box 12 and is fixedly connected to the end of the drive shaft. The chain rake 14 includes two parallel chains 14-1 and several parallel steel plates 14-2. The outer single section of the chain 14-1 is fixedly mounted with an attachment plate structure 14-3 by a pin. The attachment plate structure 14-3 is fixedly connected to the steel plate 14-2. The outer wall of the drive shaft is fixedly connected to... The system is equipped with two sprockets 16, which are connected to the chain 14-1. The lower end of the guide box 31 is open. After the chain rake 14 is output, it is opposite to the driven wheel 21 and is pressed against the ground by the driven wheel 21. The torsion spring 17 has the following elasticity: under the standard load of the carriage, when the torsion spring 17 contracts to a set amplitude, it can drive the roller to rotate in the opposite direction and pull the chain rake back. During the retraction of the chain rake, it pulls the driven wheel 21 to reverse and moves the handcart backward a certain distance. The configuration of the rotating motor is such that it can output the chain rake 14 downward by rotating the sprockets to a set length. The set length refers to the length that the chain rake 14 can be driven by the driven wheel 21. 1. The bottom end is compacted and fixed, and the contact surface between the driven wheel 21 and the ground is covered. When the driven wheel 21 presses the chain rake 14, the motor is de-energized and the lock on the output shaft is released. The chain rake 14 generates a downward pulling force on the handcart body, causing the handcart body to trip and avoid continuing to move forward due to inertia. A shock absorber is fixedly connected to the base 1 at the front end of the guide box 31. A counterweight beam 6 is configured at the rear of the base 1. The shock absorber is configured to buffer the head of the handcart body when the tripping action occurs. The weight of the counterweight beam 6 is sufficient to promote the handcart body to restore balance when the tripping action occurs. During this process, the chain rake 14 retracts and the handcart body moves backward.

[0039] In this embodiment, the structure of the chain rake is existing technology. Any aspects not described are addressed using existing solutions. Alternatively, other chain rakes capable of achieving the relevant functions can be used to replace the chain rake in this embodiment. The chain rake serves two purposes: firstly, it increases friction. When the driven wheel presses the chain rake firmly against the ground, the increased friction helps the vehicle stop. Secondly, the chain rake is directly connected to the vehicle body, causing a tripping motion similar to a person stepping on their own foot. This tripping motion replaces the forward momentum. The shock absorber and counterweight beam absorb the energy of the tripping motion and allow the vehicle to quickly regain balance. Thirdly, the chain rake retracts under the action of the torsion spring, causing the vehicle to move slightly backward, further reducing the risk of falling. Preferably, the width of the steel plate between the two chains is greater than the width of the driven wheel to prevent the driven wheel from crushing the chains.

[0040] Example 4:

[0041] Based on the above embodiments, this embodiment discloses, as follows: Figure 1-6 As shown, the chain 14-1 is a rigid chain in which only the chain body bends backward. Rigid chains are a prior art technique. In this embodiment, the rigid chain only bends towards the driven wheel, thereby ensuring that the driven wheel can crush the chain rake during movement.

[0042] Example 5:

[0043] Based on the above embodiments, this embodiment discloses:

[0044] like Figure 1-6 As shown, a horizontally arranged U-shaped seat 7 is fixedly connected to the front end of the base 1. The two free ends of the U-shaped seat 7 are respectively fixedly connected to the front end of the base 1. The shock absorber includes a mounting base 22 fixedly installed at the bottom of the two free ends of the U-shaped seat 7. A sleeve 23 is fixedly connected to the bottom end of the mounting base 22 along the longitudinal direction. A support rod 25 is slidably connected inside the sleeve 23. The bottom end of the support rod 25 extends out of the sleeve 23 and is fixedly connected to a pressure foot 26. A compression spring 24 is connected between the top end of the support rod 25 and the top end inside the sleeve 23. The height of the bottom end of the pressure foot 26 is higher than the height of the bottom end of the driven wheel. The driven wheel 21 and the fixed wheel 28 have the same shape and size. The counterweight beam 6 is fixedly connected to the rear part of the lower surface of the base 1 in the left-right direction.

[0045] In this embodiment, the purpose of setting the U-shaped seat 7 is to enable the laser rangefinder to detect whether there is airspace at a certain distance from the front of the vehicle body, and it can also be used to install other sensor components. The shock absorber can provide vibration reduction and energy dissipation when the front of the vehicle body bumps downwards, while the counterweight beam promotes the vehicle body to restore balance and acts as a counterweight to prevent the vehicle from tipping over and falling due to excessive bumping.

[0046] Example 6:

[0047] Based on the above embodiments, this embodiment discloses:

[0048] like Figure 1-5 As shown, the sensor assembly includes laser rangefinders (including a first laser rangefinder 8 located on the upper side and a second laser rangefinder 9 located on the lower side) located on the upper left and right sides of the front of the U-shaped base 7. The laser rangefinders are electrically connected to the controller via wires. The controller is also electrically connected to an alarm (not shown in the figure), and the alarm is fixedly connected to the handle.

[0049] In this embodiment, if the first laser ranging sensor detects a sudden increase in the distance to an obstacle above, it means that the vehicle may have entered an unsealed balcony or other area that may be close to open space. After the alarm is triggered, the staff can adjust the vehicle speed and observe the environment ahead. When the second laser ranging sensor suddenly detects a significant increase in the distance to an obstacle below, it means that there is an open space ahead. If the vehicle is near an elevator shaft, the controller will activate the braking mechanism for an emergency stop and simultaneously activate the emergency stop inertial control mechanism to prevent the vehicle from crashing out of the building.

[0050] Example 7:

[0051] Based on the above embodiments, such as Figure 1-4 As shown, the sensor assembly also includes infrared sensors 10 located at the front and sides of the U-shaped base. The infrared sensors 10 are electrically connected to the controller via wires. The function of the infrared sensors is obstacle avoidance.

[0052] The sensor assembly also includes a vision sensor 11 located at the front end of the carriage 2, which is electrically connected to the controller via wires. The function of the vision sensor is to detect visual images of potentially open areas and to slow down the vehicle in advance via the controller or manual adjustment.

[0053] Example 8:

[0054] Based on the above embodiments, this embodiment discloses, as follows: Figure 1-3 As shown, the driven guide wheel 3 is connected to a rotating shaft 4 at its upper end. The rotating shaft 4 passes through the rear end of the base 1 and is rotatably connected to the base 1. A handle 5 is connected to the top end of the rotating shaft 4. A control panel 27 is fixedly connected to the upper end of the handle 5. The control panel 27 is electrically connected to the controller through a wire.

[0055] Through the above settings, this invention can achieve automated driving or driving in a combination of manual and automated control. In the latter, when the second laser ranging sensor detects an airborne position, the emergency stop inertial control mechanism is activated (after emergency braking, the vehicle moves forward due to inertia. At this time, the chain rake is released, the driven wheel presses against the chain rake, the torsion spring drives the driven wheel to reverse, and at the same time the vehicle body trips. The shock absorber and counterweight beam work together to dissipate energy and promote the balance of the vehicle body). This solves the problem that even with an emergency stop, the vehicle body may still fall due to inertia.

Claims

1. A safe transport device for airport pavement construction that counteracts the inertia of sudden stops, characterized in that: Includes base, carriage, drive mechanism, braking mechanism, battery, controller, emergency stop inertial control mechanism, and sensor components; The lower end of the base is provided with a drive mechanism, which is equipped with a braking mechanism and an emergency stop inertia control mechanism. The upper end of the base is provided with a carriage, and the front end of the base is provided with a sensor assembly. The controller and battery are fixedly connected to the base. The controller is electrically connected to the drive mechanism, braking mechanism, emergency stop inertial control mechanism, sensor assembly and battery through wires. The rear end of the base is provided with a driven guide wheel, and the upper end of the driven guide wheel is connected to a handle through a rotating shaft. The drive mechanism includes a drive motor, a driving pulley, a driven pulley, a transmission belt, a first mounting plate, a second mounting plate, a main shaft, and a fixed wheel; The base has a first mounting plate fixedly installed on the left and right ends of its lower surface, and a main shaft is rotatably connected between the two first mounting plates. A fixed wheel is fixedly connected to the main shaft where the inner ends of the two first mounting plates are located, and a driven pulley is fixedly installed in the middle of the main shaft. The base has two second mounting plates facing each other on its lower surface. A drive pulley is rotatably connected between the two second mounting plates. A drive motor is fixedly mounted on the outer side of one of the second mounting plates. The output shaft of the drive motor rotatably passes through the second mounting plate and is fixedly connected to the axle of the drive pulley. The driving pulley and the driven pulley are connected by a transmission belt. The braking mechanism is a power-off electromagnetic brake connected to the main shaft. The power-off electromagnetic brake is electrically connected to a switch. The switch and the drive motor are electrically connected to the controller through wires. The emergency stop inertial control mechanism includes a counterweight beam, a chain rake release device, a shock absorber, a control box, and driven wheels. The two ends of the main shaft extend outward through the first mounting plate and are rotatably connected to driven wheels. The control box is fixedly connected to the corresponding base side above the driven wheels. A guide box is fixedly connected to the lower front side of the control box. The chain rake release device includes a winding roller rotatably connected to the rear end of the control box. The roller shaft of the winding roller is connected to the inner wall of the control box through a torsion spring. A chain rake is wound on the winding roller. The end of the chain rake extends outward along the guide rail mechanism preset on the side wall of the control box and the side wall of the guide box. The inner wall of the control box located at the upper opening of the guide box is provided with a drive shaft in the left and right direction. The drive shaft is rotatably connected to the side wall of the control box. A rotating motor is provided on the outer wall of the control box. The output shaft of the rotating motor passes through the side wall of the control box and is fixedly connected to the end of the drive shaft. The chain rake includes two parallel chains and several parallel steel plates. The outer single link of the chain is fixedly mounted with an attachment plate structure by a pin. The attachment plate structure is fixedly connected to the steel plate. Two sprockets are fixedly connected to the outer wall of the drive shaft. The sprockets are connected to the chain drive. The lower end of the guide box is open. After the chain rake is output, it is opposite to the driven wheel and is pressed against the ground under the pressure of the driven wheel. The spring force of the torsion spring satisfies the following condition: under the standard load of the carriage, when the torsion spring contracts to the set amplitude, it can drive the roller to rotate in the opposite direction and pull the chain rake back through the spring force. During the retraction of the chain rake, it pulls the driven wheel to reverse and causes the handcart to move backward a certain distance. The configuration of the rotary motor satisfies the following requirements: it can output a set length of chain rake downwards by rotating the sprocket. The set length refers to the length at which the chain rake can be pressed and fixed by the bottom end of the driven wheel and the contact surface between the driven wheel and the ground can be fully covered. When the driven wheel presses the chain rake tightly, the rotary motor is de-energized and the lock on the output shaft is released. The chain rake generates a downward pulling force on the handcart body, causing the handcart body to trip and avoid continuing to move forward due to inertia. A shock absorber is fixedly connected to the base at the front end of the guide box, and a counterweight beam is configured at the rear of the base. The shock absorber is configured to cushion the head of the handcart when a tripping action occurs. The weight of the counterweight beam is sufficient to promote the handcart to regain balance when a tripping action occurs. During this process, the chain rake retracts and the handcart moves backward.

2. The airport pavement construction safety transport device for overcoming the inertia of sudden stops as described in claim 1, characterized in that: The chain is a rigid chain that only curls backward.

3. The airport pavement construction safety transport device for overcoming the inertia of sudden stops as described in claim 2, characterized in that: The base has a horizontally arranged U-shaped seat fixedly connected to its front end. The two free ends of the U-shaped seat are respectively fixedly connected to the front end of the base. The shock absorber includes a mounting base fixedly disposed at the bottom of the two free ends of the U-shaped seat. A sleeve is fixedly connected to the bottom end of the mounting base along the longitudinal direction. A support rod is slidably connected inside the sleeve. The bottom end of the support rod extends out of the sleeve and is fixedly connected to a pressure foot. A compression spring is connected between the top end of the support rod and the top of the sleeve. The bottom end of the pressure foot is higher than the bottom end of the driven wheel. The driven wheel and the fixed wheel have the same shape and size. The counterweight beam is fixedly connected to the rear part of the lower surface of the base in the left-right direction.

4. The airport pavement construction safety transport device for overcoming the inertia of sudden stops as described in claim 3, characterized in that: The sensor assembly includes laser rangefinders located on the upper and lower sides of the left and right ends of the front of the U-shaped base. The laser rangefinders are electrically connected to the controller via wires. The controller is also electrically connected to an alarm, which is fixedly connected to the handle.

5. A safe transport device for airport pavement construction that counteracts the inertia of sudden stops, as described in claim 4, characterized in that: The sensor assembly also includes infrared sensors located at the front end and sides of the U-shaped base, and the infrared sensors are electrically connected to the controller via wires.

6. The airport pavement construction safety transport device for overcoming the inertia of sudden stops as described in claim 5, characterized in that: The sensor assembly also includes a vision sensor located at the front of the vehicle body, which is electrically connected to the controller via wires.

7. A safe transport device for airport pavement construction that counteracts the inertia of sudden stops, as described in claim 6, characterized in that: The driven guide wheel is connected to a rotating shaft at its upper end. The rotating shaft passes through the rear end of the base and is rotatably connected to the base. A handle is connected to the top end of the rotating shaft. A control panel is fixedly connected to the upper end of the handle. The control panel is electrically connected to the controller via a wire.

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