Limiting protection device for transportation

Abstract

The invention belongs to the technical field of automobile safety, and discloses a transportation limiting protection device which comprises a protection base, one side of the protection base is fixedly connected with a U-shaped mounting plate, and one side of the interior of the protection base is fixedly connected with two first driving motors. A first driving motor is started to drive a first rotating shaft to rotate, the first rotating shaft rotates to drive a worm to rotate, the worm rotates to drive a worm gear to rotate, the worm gear rotates to drive a second rotating shaft to rotate, and the second rotating shaft rotates to drive a position adjusting plate to rotate, so that the truck is adjusted, and the truck can rotate by a certain angle; therefore, low efficiency caused by the fact that a truck cannot reach a specified battery replacement position due to insufficient experience of a driver can be avoided, the battery replacement speed is increased, the battery replacement efficiency is improved, and meanwhile, the situation that the use performance and the service life of the battery are affected due to the fact that a clamping hook for hooking the battery collides with the battery is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile safety, and in particular relates to a position limiting protection device for transportation. Background Art

[0002] With the global emphasis on environmental protection and carbon emissions, electric trucks have gradually become the new favorite in the freight industry. However, problems such as long charging time and limited driving range have restricted the development of electric trucks. The battery replacement model for electric trucks refers to the centralized storage, centralized charging, and unified distribution of a large number of batteries through centralized charging stations, and the battery replacement service for electric trucks in the battery distribution station, or the integration of battery charging, logistics deployment, and battery replacement services. This battery replacement model can save car owners a large amount of money to buy batteries, and can solve the problem of long charging time, but the battery is very heavy and must be used mechanically.

[0003] First of all, in the existing truck battery swapping process, a guide rod is usually set at one end of the battery swapping station to guide the truck being swapped so that the truck can drive to the appropriate position for battery swapping. However, in this process, the guidance by the guide rod places too high demands on the driver. If a driver with insufficient driving experience enters the battery swapping station for battery swapping, it is easy for the truck to fail to reach the designated battery swapping position and needs to exit and re-enter the battery swapping station. This will lead to low efficiency during the battery swapping process and affect the battery swapping speed during the peak period of battery swapping, causing unnecessary trouble. At the same time, the battery swapping station hooks the battery of the truck by dropping a hook during battery swapping. If the truck does not reach the designated position during battery swapping, the hook will collide with the battery casing when falling, which may damage the battery casing and affect the battery performance and service life. Secondly, after the battery is replaced inside the battery swapping station, the new battery needs to be put back into the corresponding position of the truck. Due to the weight of the battery, if a certain deviation occurs during the lifting process due to external forces, it may cause unclear contactor recognition, resulting in battery swap failure. Summary of the invention The object of the present invention is to provide a position limiting protection device for transportation to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a position limiting protection device for transportation, comprising a protection base, a U-shaped mounting plate fixedly connected to one side of the protection base, two first drive motors fixedly connected to one side of the interior of the protection base, two first rotating shafts fixedly connected to the output ends of the two first driving motors, two worms fixedly sleeved on the outer sides of the middle parts of the two first rotating shafts, worm wheels threadedly connected to the opposite sides of the two worms, a second rotating shaft fixedly connected to the middle part of the worm wheels, the second rotating shaft is rotatably connected to the protection base, a support plate fixedly connected to the top of the second rotating shaft, two guide plates fixedly connected to the two sides of the support plate, an adjustment plate fixedly connected to the top of the support plate, slide grooves corresponding to the adjustment plates are provided on both sides of the protection base, a buffer assembly is provided on one side of the interior of the protection base, and a distance indicating assembly is provided inside the U-shaped mounting plate.

[0005] Preferably, the buffer assembly includes a second drive motor, the second drive motor is fixedly connected to one side of the protective base, the output end of the second drive motor is fixedly connected to a third rotating shaft, the outer side of the third rotating shaft is fixedly connected to a first pulley, a second pulley is provided on one side of an interior of the protective base, the second pulley is arranged corresponding to the first pulley, a first belt is provided on the outer side of the first pulley and the second pulley, the first pulley and the second pulley are connected through the first belt, a fourth rotating shaft is fixedly connected to the interior of the first pulley, and the fourth rotating shaft is rotatably connected to the protective base.

[0006] Preferably, the buffer assembly further comprises two positioning plates, the two positioning plates are threadedly connected to the outer side of the fourth rotating shaft, a mounting groove is opened on one side inside the positioning plate, a spring is fixedly connected inside the mounting groove, and a top plate is fixedly connected to the top of the spring.

[0007] Preferably, the distance indicating assembly includes a third pulley, the third pulley is fixedly connected to the outside of the third rotating shaft, the third pulley is fixedly connected to the first pulley, the U-shaped mounting plate is internally rotatably connected to a fourth pulley, the outside of the fourth pulley is provided with a second belt, the third pulley and the fourth pulley are connected via the second belt, the fourth pulley is internally rotatably connected to a fifth rotating shaft, and the fifth rotating shaft is rotatably connected to the U-shaped mounting plate.

[0008] Preferably, the distance indicating assembly also includes a gear, which is movably sleeved on the outer side of the middle part of the fifth rotating shaft, a rack is threadedly connected to one side of the gear, a distance indicating screen is fixedly connected to one side of the rack, a first mounting plate is fixedly connected to the middle part of the bottom of the distance indicating screen, and a ranging camera is fixedly connected to one side of the first mounting plate.

[0009] Preferably, the bottom of the adjustment plate fits with the top of the protection base, through slots are provided on both sides of the protection base, the height of the through slots is higher than the height of the adjustment plate, and the length of the through slots is longer than the length of the adjustment plate.

[0010] Preferably, the worm is arranged in the middle of the worm wheel, the second rotating shaft passes through the support plate and is fixedly connected to the adjustment plate, the support plate does not rotate after moving, and the support plate is smoothly connected inside the protective base.

[0011] Preferably, the shape of the slide groove is the same as that of the guide plate, the slide groove and the guide plate are completely fitted together, and the length of the slide groove is longer than that of the guide plate.

[0012] Preferably, the positioning plates have the same diameter, and the top plate corresponds to the position of the truck battery.

[0013] Preferably, a protective groove is provided inside the U-shaped mounting plate corresponding to the distance display screen and the distance measuring camera, and the protective groove is provided in the middle of the bottom end of the U-shaped mounting plate.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention starts the first drive motor to drive the first rotating shaft to rotate, the rotation of the first rotating shaft drives the worm to rotate, the rotation of the worm drives the worm wheel to rotate, the rotation of the worm wheel drives the second rotating shaft to rotate, the rotation of the second rotating shaft drives the adjustment plate to rotate, so as to adjust the truck so that the truck can be rotated to a certain angle, thereby preventing the driver from being unable to reach the designated battery replacement position due to lack of experience, resulting in too low efficiency, improving the battery replacement speed and efficiency, and at the same time preventing the hook for hooking the battery from colliding with the battery to cause damage to the battery, affecting the battery's performance and service life.

[0015] 2. The present invention can push the worm wheel forward when the two worms rotate in the same direction. The worm wheel moves forward and drives the second rotating shaft forward. The second rotating shaft moves forward and drives the support plate forward. The support plate moves forward and drives the adjustment plate forward, thereby adjusting the linear position of the truck. This prevents the truck driver from failing to reach the specified position when entering the battery swap station to swap batteries, and needs to restart the truck for adjustment. This allows the truck to reach the battery swap position more effectively, thereby improving the battery swap efficiency.

[0016] 3. The present invention drives the third pulley to rotate through the rotation of the second drive motor, and the rotation of the third pulley drives the distance display screen to move up and down, and the up and down movement of the distance display screen drives the first mounting plate to move up and down, and the up and down movement of the first mounting plate drives the distance measurement camera to move up and down, thereby measuring the distance of the truck and displaying it on the distance display screen to warn the driver, so that the driver can better judge the driving distance, thereby improving the driver's sense of distance and avoiding the driver from driving too far, further improving the battery replacement efficiency, and at the same time, after the driver is about to drive out, the second drive motor can be rotated in the reverse direction, and the reversal of the second drive motor will drive the distance display screen to move in the reverse direction and shrink into the U-shaped mounting plate, thereby protecting the distance display screen, improving the protection effect of the distance display screen, and avoiding unnecessary economic losses; 4. The present invention starts the second drive motor to drive the third shaft to rotate, the rotation of the third shaft drives the first pulley to rotate, the rotation of the first pulley drives the second pulley to rotate, the rotation of the second pulley drives the fourth shaft to rotate, the rotation of the fourth shaft drives the positioning plate to move, the movement of the positioning plate drives the spring and the top plate to move, after the spring and the top plate move, they correspond to the battery to be replaced, the positioning plate limits the battery to be replaced, thereby ensuring the installation position of the battery, so that the battery can be offset without being affected by external factors, causing damage to the contactor, and causing battery replacement failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of a U-shaped mounting plate of the present invention; Figure 3 is a cross-sectional view of the protective base of the present invention; Figure 4 It is a structural schematic diagram of the worm of the present invention; Figure 5 is a schematic structural diagram of the second rotating shaft of the present invention; Figure 6 This is a schematic diagram of the structure of the buffer assembly of the present invention; Figure 7 For the present invention Figure 2 A magnified view of the structure at center; Figure 8 It is a schematic diagram of the structure of the distance indicating component of the present invention.

[0018] In the figure: 1. protective base; 2. first drive motor; 3. first rotating shaft; 4. worm; 5. worm wheel; 6. second rotating shaft; 7. support plate; 8. guide plate; 9. adjustment plate; 10. slide groove; 11. second drive motor; 12. third rotating shaft; 13. first pulley; 131. second pulley; 14. first belt; 15. fourth rotating shaft; 16. positioning plate; 17. spring; 18. top plate; 19. third pulley; 191. fourth pulley; 20. second belt; 21. fifth rotating shaft; 22. gear; 23. rack; 24. distance display screen; 25. first mounting plate; 26. ranging camera; 27. U-shaped mounting plate. DETAILED DESCRIPTION

[0019] The following will be combined with 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.

[0020] 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.

[0021] like Figures 1 to 8As shown, an embodiment of the present invention provides a position limiting protection device for transportation, including a protection base 1, a U-shaped mounting plate 27 is fixedly connected to one side of the protection base 1, two first drive motors 2 are fixedly connected to one side of the inside of the protection base 1, the output ends of the two first drive motors 2 are fixedly connected to two first rotating shafts 3, two worms 4 are fixedly sleeved on the outer sides of the middle parts of the two first rotating shafts 3, worm wheels 5 are threadedly connected to the opposite sides of the two worms 4, a second rotating shaft 6 is fixedly connected to the middle part of the worm wheel 5, the second rotating shaft 6 is rotatably connected to the protection base 1, a support plate 7 is fixedly connected to the top of the second rotating shaft 6, two guide plates 8 are fixedly connected to the two sides of the support plate 7, an adjustment plate 9 is fixedly connected to the top of the support plate 7, and the two sides of the protection base 1 correspond to the adjustment plates 8. The positioning plate 9 is provided with a slide groove 10, a buffer assembly is provided on one side of the interior of the protective base 1, and a distance indicating assembly is provided inside the U-shaped mounting plate 27. The first driving motor 2 is started to drive the first rotating shaft 3 to rotate, and the rotation of the first rotating shaft 3 drives the worm 4 to rotate, and the rotation of the worm 4 drives the worm wheel 5 to rotate. The rotation of the worm wheel 5 will drive the second rotating shaft 6 to rotate the rod, and the rotation of the second rotating shaft 6 drives the positioning plate 9 to rotate, so as to adjust the truck so that the truck can be rotated to a certain angle, thereby preventing the driver from being unable to reach the designated battery replacement position due to lack of experience, resulting in too low efficiency, improving the battery replacement speed and efficiency, and at the same time avoiding the collision between the hook for hooking the battery and the battery to cause damage to the battery, affecting the battery's performance and service life.

[0022] Wherein, the buffer assembly includes a second drive motor 11, the second drive motor 11 is fixedly connected to one side of the protective base 1, the output end of the second drive motor 11 is fixedly connected to the third rotating shaft 12, the outer side of the third rotating shaft 12 is fixedly connected to the first pulley 13, a second pulley 131 is arranged on one side of the inner part of the protective base 1, the second pulley 131 is arranged corresponding to the first pulley 13, the outer side of the first pulley 13 and the second pulley 131 is sleeved with a first belt 14, the first pulley 13 and the second pulley 131 are connected through the first belt 14, the inner part of the first pulley 13 is fixedly connected to the fourth rotating shaft 15, the fourth rotating shaft 15 is rotatably connected to the protective base 1, and the buffer assembly also includes two positioning plates 16, the two positioning plates 16 are threadedly connected to the outer side of the fourth rotating shaft 15, the positioning plates 16 An installation groove is opened on one side of the interior, and a spring 17 is fixedly connected inside the installation groove. A top plate 18 is fixedly connected to the top of the spring 17. The third rotating shaft 12 is driven to rotate by starting the second driving motor 11. The rotation of the third rotating shaft 12 drives the first pulley 13 to rotate. The rotation of the first pulley 13 drives the second pulley 131 to rotate. The rotation of the second pulley 131 drives the fourth rotating shaft 15 to rotate. The rotation of the fourth rotating shaft 15 drives the positioning plate 16 to move. The movement of the positioning plate 16 drives the spring 17 and the top plate 18 to move. After the spring 17 and the top plate 18 move, they correspond to the battery to be replaced. The positioning plate 16 limits the battery to be replaced, thereby ensuring the installation position of the battery, so that the battery can be offset without being affected by external forces, causing contactor damage and battery replacement failure.

[0023] Among them, the distance indicating component includes a third pulley 19, the third pulley 19 is fixedly connected to the outside of the third rotating shaft 12, the third pulley 19 is fixedly connected to the first pulley 13, the U-shaped mounting plate 27 is internally rotatably connected with a fourth pulley 191, the outside of the fourth pulley 191 is sleeved with a second belt 20, the third pulley 19 and the fourth pulley 191 are connected through the second belt 20, the fourth pulley 191 is internally rotatably connected with a fifth rotating shaft 21, the fifth rotating shaft 21 is rotatably connected to the U-shaped mounting plate 27, the distance indicating component also includes a gear 22, the gear 22 is movably sleeved on the outside of the middle of the fifth rotating shaft 21, a rack 23 is threadedly connected to one side of the gear 22, a distance indicating screen 24 is fixedly connected to one side of the rack 23, a first mounting plate 25 is fixedly connected to the middle of the bottom of the distance indicating screen 24, a distance measuring camera 26 is fixedly connected to one side of the first mounting plate 25, and a second driving The rotation of the motor 11 will drive the third pulley 19 to rotate, and the rotation of the third pulley 19 will drive the distance indicating screen 24 to move up and down. The up and down movement of the distance indicating screen 24 will drive the first mounting plate 25 to move up and down. The up and down movement of the first mounting plate 25 will drive the distance measuring camera 26 to move up and down, thereby measuring the distance of the truck and displaying it on the distance indicating screen 24 to warn the driver so that the driver can better judge the driving distance, thereby improving the driver's sense of distance and avoiding the driver from driving too far, further improving the battery replacement efficiency. At the same time, after the driver is about to drive out, the second drive motor 11 can be rotated in the opposite direction. The reversal of the second drive motor 11 will drive the distance indicating screen 24 to move in the opposite direction and shrink into the U-shaped mounting plate 27, thereby protecting the distance indicating screen 24, improving the protection effect of the distance indicating screen 24, and avoiding unnecessary economic losses.

[0024] Among them, the bottom of the adjustment plate 9 is in contact with the top of the protective base 1, and through grooves are arranged on both sides of the protective base. The height of the through grooves is higher than the height of the adjustment plate 9, and the length of the through grooves is longer than the length of the adjustment plate 9. The worm 4 is arranged in the middle of the worm wheel 5, and the second rotating shaft 6 passes through the support plate 7 and is fixedly connected to the adjustment plate 9. The support plate 7 does not rotate after moving, and the support plate 7 is smoothly connected inside the protective base 1. The bottom of the adjustment plate 9 is in contact with the top of the protective base 1, so that the truck can be supported by the protective base 1 when it travels to the surface of the adjustment plate 9. The second rotating shaft 6 passes through the support plate 7 and is fixedly connected to the adjustment plate 9, so that the adjustment plate 9 can be driven by the worm 4 to move linearly and rotate, so as to better align the truck with the battery replacement position and improve the battery replacement effect.

[0025] Among them, the shape of the slide groove 10 is the same as that of the guide plate 8, the slide groove 10 is completely fitted with the guide plate 8, the length of the slide groove 10 is longer than the length of the guide plate 8, the positioning plate 16 has the same diameter, the top plate 18 corresponds to the position of the truck battery, and a protective groove is provided inside the U-shaped mounting plate 27 corresponding to the distance-indicating screen 24 and the distance-measuring camera 26. The protective groove is provided in the middle of the bottom end of the U-shaped mounting plate 27. The length of the slide groove 10 is longer than the length of the guide plate 8, so that the truck has adjustment space after driving to the surface of the positioning plate 9 so that it can adjust the distance. The protective groove protects the distance-indicating screen 24 when it is not working, thereby reducing the risk of damage and avoiding unnecessary economic losses.

[0026] Working principle: The truck travels to the top of the adjustment plate 9 through the protective base 1. At this time, different tilt angles will be formed due to different driving skills of the driving drivers, making it impossible for the truck to reach the designated battery replacement position. At this time, the first drive motor 2 starts to drive the first shaft 3 to rotate, and the rotation of the first shaft 3 drives the worm 4 to rotate, and the rotation of the worm 4 drives the worm wheel 5 to rotate. The rotation of the worm wheel 5 will drive the second shaft 6 to rotate, and the rotation of the second shaft 6 drives the adjustment plate 9 to rotate, thereby adjusting the truck so that the truck can be rotated to a certain angle, thereby avoiding the driver's lack of experience, which leads to the truck being unable to reach the designated battery replacement position, resulting in low efficiency, and improving the battery replacement speed and efficiency. At the same time, it can avoid the hook for hooking the battery from colliding with the battery, causing damage to the battery, affecting the performance and service life of the battery, and because the worm wheel 5 and the two worms 4 are meshed respectively, when the two worms 4 rotate in the same direction, they can push the worm wheel 5 to move forward, and the worm wheel 5 moves forward to drive the second shaft 6 to move forward, and the second shaft 6 moves forward to drive the support plate 7 to move forward, and the support plate 7 moves forward to drive the adjustment plate 9 to move forward, so as to adjust the linear position of the truck, so as to avoid the truck driver from not reaching the specified position when entering the battery swap station to swap batteries, and needing to restart the truck for adjustment, so that the truck can reach the battery swap position more effectively, thereby improving the battery swap efficiency; At the same time, when the truck enters, the second drive motor 11 is started, and the rotation of the second drive motor 11 drives the third pulley 19 to rotate, and the rotation of the third pulley 19 drives the fifth rotating shaft 21 to rotate, and the rotation of the fifth rotating shaft 21 drives the gear 22 to rotate, and the rotation of the gear 22 drives the rack 23 to move up and down, and the rack 23 moves up and down to drive the distance display screen 24 to move up and down, and the distance display screen 24 moves up and down to drive the first mounting plate 25 to move up and down, and the first mounting plate 25 moves up and down to drive the distance measurement camera 26 to move up and down, so as to measure the distance of the truck, and display it on the distance display screen 24, and warn the driver, so that the driver can better judge the driving distance, thereby improving the driver's sense of distance and avoiding the driver from driving too far, and further improving the battery replacement efficiency. At the same time, after the driver is about to drive out, the second drive motor 11 can be rotated in the opposite direction, and the reversal of the second drive motor 11 will drive the distance display screen 24 to move in the opposite direction and shrink into the U-shaped mounting plate 27, so as to protect the distance display screen 24, improve the protection effect of the distance display screen 24, and avoid unnecessary economic losses; At the same time, the start of the second drive motor 11 will also drive the third shaft 12 to rotate, the rotation of the third shaft 12 will drive the first pulley 13 to rotate, the rotation of the first pulley 13 will drive the second pulley 131 to rotate, the rotation of the second pulley 131 will drive the fourth shaft 15 to rotate, the rotation of the fourth shaft 15 will drive the positioning plate 16 to move, the movement of the positioning plate 16 will drive the spring 17 and the top plate 18 to move, the spring 17 and the top plate 18 will move to correspond to the battery to be replaced, the positioning plate 16 limits the battery to be replaced, so as to ensure the battery installation position is guaranteed, so that the battery can be protected from External force factors cause deviation, resulting in damage to the contactor and causing battery replacement failure. At the same time, since the buffer assembly and the distance-indicating assembly are both driven by the second drive motor 11, when the second drive motor 11 rotates forward, it will drive the distance-indicating assembly to move downward to measure the distance of the truck. At this time, the positioning plate 16 will move to both sides to avoid contact with the truck. After the truck reaches the specified position through adjustment, the second drive motor 11 reverses, aligns the buffer assembly with the battery, and folds up the distance-indicating assembly to protect it. At this point, the work is completed, the truck completes the battery replacement, and can leave.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A position limiting protection device for transportation, comprising a protection base (1), one side of the protection base (1) being fixedly connected to a U-shaped mounting plate (27), characterized in that: Two first drive motors (2) are fixedly connected to one side of the interior of the protection base (1), and the output ends of the two first drive motors (2) are fixedly connected to two first rotating shafts (3). Two worms (4) are fixedly sleeved on the outer sides of the middle parts of the two first rotating shafts (3). A worm wheel (5) is threadedly connected to the opposite sides of the two worms (4). A second rotating shaft (6) is fixedly connected to the middle part of the worm wheel (5). The second rotating shaft (6) is rotatably connected to the protection base (1). A support plate (7) is fixedly connected to the top of the second rotating shaft (6). Two guide plates (8) are fixedly connected to the two sides of the support plate (7). An adjustment plate (9) is fixedly connected to the top of the support plate (7). Slide grooves (10) are provided on both sides of the protection base (1) corresponding to the adjustment plates (9). A buffer component is provided on one side of the interior of the protection base (1), and a distance indicator component is provided inside the U-shaped mounting plate (27).

2. A transportation limit protection device according to claim 1, characterized in that: The buffer assembly comprises a second drive motor (11), the second drive motor (11) is fixedly connected to one side of the protection base (1), the output end of the second drive motor (11) is fixedly connected to a third rotating shaft (12), the outer side of the third rotating shaft (12) is fixedly connected to a first pulley (13), a second pulley (131) is arranged on one side inside the protection base (1), the second pulley (131) is arranged corresponding to the first pulley (13), a first belt (14) is sleeved on the outer side of the first pulley (13) and the second pulley (131), the first pulley (13) and the second pulley (131) are connected via the first belt (14), a fourth rotating shaft (15) is fixedly connected inside the first pulley (13), and the fourth rotating shaft (15) is rotatably connected to the protection base (1).

3. A transportation limit protection device according to claim 2, characterized in that: The buffer assembly further comprises two positioning plates (16), the two positioning plates (16) being threadedly connected to the outside of the fourth rotating shaft (15), a mounting groove being provided on one side of the interior of the positioning plate (16), a spring (17) being fixedly connected inside the mounting groove, a top plate (18) being fixedly connected to the top of the spring (17), and the top plate (18) being slidably disposed in the mounting groove.

4. A transportation limit protection device according to claim 3, characterized in that: The distance indicating assembly comprises a third pulley (19), the third pulley (19) being fixedly connected to the outside of the third rotating shaft (12), the third pulley (19) being fixedly connected to the first pulley (13), a fourth pulley (191) being rotatably connected inside the U-shaped mounting plate (27), a second belt (20) being sleeved on the outside of the fourth pulley (191), the third pulley (19) and the fourth pulley (191) being connected via the second belt (20), a fifth rotating shaft (21) being rotatably connected inside the fourth pulley (191), and the fifth rotating shaft (21) being rotatably connected to the U-shaped mounting plate (27).

5. A transportation limiting protection device according to claim 4, characterized in that: The distance indicating assembly further comprises a gear (22), the gear (22) being movably sleeved on the outer side of the middle portion of the fifth rotating shaft (21), a rack (23) being threadedly connected to one side of the gear (22), a distance indicating screen (24) being fixedly connected to one side of the rack (23), a first mounting plate (25) being fixedly connected to the middle portion of the bottom of the distance indicating screen (24), and a distance measuring camera (26) being fixedly connected to one side of the first mounting plate (25).

6. A transportation limiting protection device according to claim 5, characterized in that: The bottom of the adjustment plate (9) fits with the top of the protection base (1), and through slots are provided on both sides of the protection base (1), the height of the through slots is higher than the height of the adjustment plate (9), and the length of the through slots is longer than the length of the adjustment plate (9).

7. A transportation limiting protection device according to claim 6, characterized in that: The worm (4) is arranged in the middle of the worm wheel (5); the second rotating shaft (6) passes through the support plate (7) and is fixedly connected to the adjustment plate (9); the support plate (7) does not rotate after moving; and the support plate (7) is smoothly connected inside the protective base (1).

8. A transportation limiting protection device according to claim 7, characterized in that: The shape of the slide groove (10) is the same as that of the guide plate (8), the slide groove (10) and the guide plate (8) are completely fitted together, and the length of the slide groove (10) is longer than the length of the guide plate (8).

9. A transportation limiting protection device according to claim 8, characterized in that: The positioning plates (16) have the same diameter, and the top plate (18) corresponds to the position of the truck battery.

10. A transportation position limiting protection device according to claim 9, characterized in that: A protective groove is provided inside the U-shaped mounting plate (27) corresponding to the distance display screen (24) and the distance measurement camera (26), and the protective groove is provided in the middle of the bottom end of the U-shaped mounting plate (27).

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