Height limiting device for bridge in workshop
By installing a sliding support rod and a motor-driven rope on the height restriction frame, the applicability of the height restriction device under different bridge widths is solved, and flexible adjustment of width and height is achieved, improving the adaptability and safety of the height restriction device for workshop bridges.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-29
- Publication Date
- 2026-04-10
AI Technical Summary
Existing workshop height restriction devices cannot effectively adjust their width to match the width of bridges of different widths, resulting in limited applicability.
By applying tension to both sides of the height restriction frame, the first and second support rods slide in the slide bar. Combined with motor-driven rope and bolt adjustment, the width and height of the height restriction frame can be flexibly adjusted to meet the height restriction requirements of bridges with different spans. The safety and convenience are improved by using reflective markings, buffer structures and moving devices.
It enables the height restriction frame to flexibly adapt to different bridge widths and vehicle heights, reduces applicability issues caused by changes in bridge width and vehicle vibration, and improves the multi-scenario adaptability and safety of the height restriction device.
Smart Images
Figure CN121827253A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bridge construction technology, and in particular to a height restriction device for bridges inside a workshop. Background Technology
[0002] Height restriction devices are facilities used to limit the height of objects passing through a specific area. They are usually composed of structures such as columns and beams, and can prevent excessively tall objects from entering. They are widely used in roads, factories, workshops and other scenarios to ensure the safety of facilities, vehicles and personnel in the area.
[0003] The height restriction device for bridges inside the workshop is a height restriction facility designed for bridge passages connecting different areas within the workshop. The height is set according to the actual height of forklifts, trucks, stacking equipment, etc. passing under the bridge passage, ensuring the dual safety of internal logistics and personnel passage.
[0004] Most existing workshop height restriction devices can only restrict vertical height. When transferring these devices to bridges of different widths, the width of the device itself cannot match the width of the bridge, resulting in limited applicability. Summary of the Invention
[0005] Therefore, the technical problem to be solved by the present invention is to overcome the fact that most existing workshop height restriction devices can only restrict the vertical height. When facing bridges of different widths, the width of the height restriction device itself cannot reach the same distance as the width of the bridge, resulting in low applicability.
[0006] To solve the above-mentioned technical problems, the present invention provides a height restriction device for a bridge inside a workshop, including a height restriction frame, a pair of reference lines fixedly connected to the side wall of the height restriction frame; a pair of first support plates fixedly connected to the side wall of the height restriction frame; the first support plates are located at the top of the height restriction frame; a bolt is threadedly connected to the middle of the first support plate; a pair of first support rods fixedly connected to the side wall of the height restriction frame; the first support plates are threadedly connected to the side wall of the first support rods; a first sliding rod is slidably connected to the middle of the first support rods; a pair of second support rods are slidably connected to the middle of the height restriction frame; a second sliding rod is slidably connected to the middle of the second support rods; a pair of motors are fixedly connected to the bottom end of the first support rods; the... A rope is fixed to the bottom of the motor; the bottom of the rope is connected to a second sliding rod; by applying tension to both sides of the height restriction frame, the first support rod and the second support rod slide in the middle of the first and second sliding rods respectively, which can flexibly adjust the overall width of the height restriction frame to meet the height restriction requirements of workshop bridges with different spans, reduce the inapplicability of the overall height restriction frame due to changes in bridge width, and further increase the overall bridge adaptability of the height restriction frame. The bolts cooperate with the first support rod to reduce the sliding of the first support rod in the first sliding rod, and reduce the deviation of the height restriction frame width caused by vehicle vibration. The motor drives the second sliding rod to move and limit the height, which can be adjusted according to the height requirements of different vehicles.
[0007] In one embodiment of the present invention, a first fixed seat is fixedly connected to the top of the first slide rod; a screw is rotatably connected to the top of the first fixed seat; a slider is threadedly connected to the middle of the screw; the slider is slidably connected to the top of the first fixed seat; a reflective mark is fixedly connected to the side wall of the first fixed seat; a scraper is fixedly connected to the side wall of the slider; the reflective mark can provide a warning when a vehicle approaches, which can reduce the collision of the vehicle with the second support rod due to obstructed vision; the rotation of the screw drives the scraper to slide, scraping away contaminants on the surface of the reflective mark, which can ensure that the reflective mark remains clearly visible during long-term use.
[0008] In one embodiment of the present invention, multiple sets of damping spring telescopic rods are fixedly connected to the side wall of the second slide rod; a buffer plate is fixedly connected to the middle of the damping spring telescopic rod; a rubber pad is fixedly connected to the top of the buffer plate; the rubber pad contacts the initial buffer to reduce direct impact, and then the buffer plate drives the multiple sets of damping spring telescopic rods to retract for secondary buffering, which can further disperse the impact force, reduce the damage to the height restriction frame and the vehicle caused by excessive impact force, and increase its safety.
[0009] In one embodiment of the present invention, a first support base is fixedly connected to the top of the height restriction frame; a suspension rope is fixedly connected to the bottom of the first support base; a bell is fixedly connected to the bottom of the suspension rope; by setting the bell in front of the second support rod, the collision of height restriction vehicles with unclear heights with the second support rod can be further reduced, allowing the vehicle to stop in advance and change the route.
[0010] In one embodiment of the present invention, the bottom end of the height restriction frame is fixedly connected to multiple sets of second fixed seats; the top end of the second fixed seats is fixedly connected to an electric push rod; the electric push rod passes through the second fixed seat; the bottom end of the electric push rod is fixedly connected to a wheel; by the cooperation of the electric push rod and the wheel, the entire height restriction frame can be moved within the workshop, which can increase the convenience of moving the entire height restriction frame when the workshop production layout needs to be adjusted and the height restriction position needs to be temporarily changed.
[0011] In one embodiment of the present invention, a weighing box is slidably connected to the bottom of the height restriction frame; a handle is fixed to the top of the weighing box; by placing weight-adding blocks inside the weighing box, the overall weight of the height restriction frame can be increased, reducing damage to the workshop floor.
[0012] In one embodiment of the present invention, a plurality of third fixing seats are fixedly connected to the side wall of the first sliding rod; the third fixing seats are arranged in an array on the side wall of the first sliding rod; a spotlight is fixedly connected to the top of the third fixing seat; the light emitted by the spotlight illuminates the second sliding rod, allowing personnel at a distance to clearly see the overall height restriction range of the height restriction frame, reducing the risk of not being able to observe the height restriction position due to dim lighting.
[0013] In one embodiment of the present invention, a second support base is fixedly connected to the bottom end of the motor; the second support base is correspondingly arranged with the motor; a blocking ring is fixedly connected to the side wall of the second support base; the rope passes through the middle of the blocking ring; the blocking ring cleans contaminants during rope operation, ensuring that the rope surface remains clean and reducing the amount of contaminants attached to the rope being wound into the motor, which would cause the rope winding and releasing to be unsmooth.
[0014] In one embodiment of the present invention, a pair of cleaning blocks are fixedly connected to the top of the second support rod; the cleaning blocks are slidably connected to the side wall of the height restriction frame; when the cleaning blocks move synchronously with the second support rod, the pollutants attached to the middle of the height restriction frame and the second support rod can be cleaned, reducing the jamming of the sliding part of the second support rod caused by the accumulation of pollutants.
[0015] In one embodiment of the present invention, a pair of protective pads are fixed to the bottom end of the height restriction frame; the protective pads are disposed on the inner side wall of the height restriction frame; through the buffering effect of the protective pads, the direct frictional contact between the side of the vehicle and the side of the height restriction frame can be reduced, so as to prevent damage to the side of the vehicle and the side of the height restriction frame, resulting in paint peeling or dents.
[0016] The technical solution of the present invention has the following advantages compared with the prior art:
[0017] The present invention discloses a height restriction device for bridges inside a workshop. By applying tension to both sides of the height restriction frame, the first support rod and the second support rod slide in the middle of the first slide rod and the second slide rod, respectively. This allows for flexible adjustment of the overall width of the height restriction frame to meet the height restriction requirements of workshop bridges with different spans. It reduces the inapplicability of the height restriction frame due to changes in bridge width and further increases the overall bridge adaptability of the height restriction frame. The bolts cooperate with the first support rod to reduce the sliding of the first support rod within the first slide rod, reducing deviations in the width of the height restriction frame caused by vibrations from vehicle traffic. The motor drives the second slide rod to move and limit the height, which can be adjusted according to the height requirements of different vehicles.
[0018] The present invention discloses a height restriction device for an internal bridge in a workshop. The reflective markings provide a warning when vehicles approach, which can reduce the risk of vehicles colliding with the second support rod due to obstructed vision. The rotation of the screw drives the scraper to slide and remove contaminants from the surface of the reflective markings, ensuring that the reflective markings remain clearly visible during long-term use. Attached Figure Description
[0019] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0020] Figure 1 This is a perspective view of the present invention;
[0021] Figure 2 This is a schematic diagram of the buffer plate in this invention;
[0022] Figure 3 This is a schematic diagram of the blocking ring in this invention;
[0023] Figure 4 This is a schematic diagram of the weighing box in this invention;
[0024] Figure 5 This is a schematic diagram of the protective pad structure in this invention.
[0025] Instruction manual diagram markings: 1. Height limit frame; 11. Reference line; 12. First support plate; 13. Bolt; 14. First support rod; 15. First sliding rod; 16. Second support rod; 17. Second sliding rod; 18. Motor; 19. Rope; 2. First fixed seat; 21. Screw; 22. Slider; 23. Reflective mark; 24. Scraper; 3. Damping spring telescopic rod; 31. Buffer plate; 32. Rubber pad; 4. First support seat; 41. Suspension rope; 42. Bell; 5. Second fixed seat; 51. Electric actuator; 52. Rotary wheel; 6. Weighing box; 61. Handle; 7. Third fixed seat; 71. Spotlight; 8. Second support seat; 81. Blocking ring; 9. Cleaning block; 10. Protective pad. Detailed Implementation
[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.
[0027] Reference Figures 1 to 5 As shown, a height restriction device for an internal bridge in a workshop according to the present invention includes a height restriction frame 1, a pair of reference lines 11 fixedly connected to the side wall of the height restriction frame 1; a pair of first support plates 12 fixedly connected to the side wall of the height restriction frame 1; the first support plates 12 are disposed at the top of the height restriction frame 1; a bolt 13 is threadedly connected to the middle of the first support plates 12; a pair of first support rods 14 fixedly connected to the side wall of the height restriction frame 1; the first support plates 12 are threadedly connected to the side wall of the first support rods 14; a first sliding rod 15 is slidably connected to the middle of the first support rods 14; a pair of second support rods 16 are slidably connected to the middle of the height restriction frame 1; the second support rods 16 are... The first support rod 14 is slidably connected to a second sliding rod 17; a pair of motors 18 are fixedly connected to the bottom end of the first support rod 14; a rope 19 is fixedly connected to the bottom end of the motor 18; the bottom end of the rope 19 is connected to the second sliding rod 17; during operation, the height restriction frame 1 is moved as a whole to the position where the height restriction is required, then the overall width of the bridge is measured, and then tension is applied to both sides of the height restriction frame 1. The pair of first support rods 14 and second support rods 16 will slide from the middle of the first sliding rod 15 and the second sliding rod 17 due to the tension applied to both sides of the height restriction frame 1. At this time, the height restriction frame 1 can adjust its overall width by adjusting the second sliding rod 17 and the first sliding rod 15, and adjust the entire height restriction frame 1 to the specified width. Then, rotate bolt 13 to move it to the middle of the first support plate 12 until it is screwed into the side wall of the first support rod 14, fixing the pair of first support rods 14 so that the first support rods 14 do not slide with the first sliding rod 15. This allows the overall width of the height restriction frame 1 to be adjusted according to the width of the bridge. After the height restriction frame 1 is adjusted, a pair of motors 18 can be started to drive the rope 19 to wind up, allowing the second support rod 16 to slide up and down in the middle of the height restriction frame 1. When motor 18 releases the rope 19, the second support rod 16 will descend against the side wall of the height restriction frame 1 due to gravity, thereby adjusting the overall height restriction of the height restriction frame 1. By applying pressure to both sides of the height restriction frame 1... The tension causes the first support rod 14 and the second support rod 16 to slide in the middle of the first slide rod 15 and the second slide rod 17 respectively, which can flexibly adjust the overall width of the height restriction frame 1 to meet the height restriction requirements of workshop bridges with different spans, reduce the inapplicability of the overall height restriction frame 1 due to changes in bridge width, and further increase the overall bridge adaptability of the height restriction frame 1. The bolt 13 cooperates with the first support rod 14 to reduce the sliding of the first support rod 14 in the first slide rod 15, and reduce the deviation of the width of the height restriction frame 1 caused by vehicle vibration. The motor 18 drives the second slide rod 17 to move and limit the height, which can be adjusted according to the height requirements of different vehicles.
[0028] Reference Figures 1 to 2As shown, a first fixed seat 2 is fixedly connected to the top of the first sliding rod 15; a screw 21 is rotatably connected to the top of the first fixed seat 2; a slider 22 is threadedly connected to the middle of the screw 21; the slider 22 is slidably connected to the top of the first fixed seat 2; a reflective mark 23 is fixedly connected to the side wall of the first fixed seat 2; a scraper 24 is fixedly connected to the side wall of the slider 22; during operation, the reflective mark 23 on the side of the first fixed seat 2 can provide a warning when the vehicle is driving. When the reflective mark 23 has been used for a long time, contaminants will adhere to the surface of the reflective mark 23. At this time, the screw 21 can be rotated, and the slider 22 will slide on the top of the first fixed seat 2 due to the rotation of the screw 21. The scraper 24 can scrape off the contaminants on the surface of the reflective mark 23; the reflective mark 23 can provide a warning when the vehicle is approaching, which can reduce the collision of the vehicle with the second support rod 16 due to obstructed vision. The rotation of the screw 21 drives the scraper 24 to slide, scraping off the contaminants on the surface of the reflective mark 23, which can ensure that the reflective mark 23 remains clearly visible during long-term use.
[0029] Reference Figures 1 to 2 As shown, multiple sets of damping spring telescopic rods 3 are fixedly connected to the side wall of the second slide rod 17; a buffer plate 31 is fixedly connected to the middle of the damping spring telescopic rod 3; a rubber pad 32 is fixedly connected to the top of the buffer plate 31; during operation, when the vehicle height exceeds the specified limit height of the second slide rod 17 and impacts, it can first impact the surface of the rubber pad 32 for initial buffering. Subsequently, the buffer plate 31 will cause the multiple sets of damping spring telescopic rods 3 to contract due to the impact force, further buffering the impact force. The initial buffering through the contact of the rubber pad 32 reduces direct collision. Subsequently, the buffer plate 31 causes the multiple sets of damping spring telescopic rods 3 to contract for secondary buffering, which can further disperse the impact force, reduce the damage to the height restriction frame 1 and the vehicle caused by excessive impact force, and increase its safety.
[0030] Reference Figures 1 to 2 As shown, a first support base 4 is fixedly connected to the top of the height restriction frame 1; a suspension rope 41 is fixedly connected to the bottom of the first support base 4; and a bell 42 is fixedly connected to the bottom of the suspension rope 41. During operation, when a vehicle is unsure whether its height exceeds the limit, it can slowly move to the bottom of the first support base 4. When the vehicle touches the bell 42 during the movement, the bell 42 will ring, indicating that the vehicle's height exceeds the standard. By placing the bell 42 in front of the second support rod 16, the risk of height restriction vehicles colliding with the second support rod 16 due to uncertainty about their own height can be further reduced, allowing the vehicle to stop in advance and change the route.
[0031] Reference Figures 4 to 5As shown, the bottom of the height restriction frame 1 is fixedly connected to multiple sets of second fixed seats 5; the top of the second fixed seats 5 is fixedly connected to an electric push rod 51; the electric push rod 51 is installed through the second fixed seats 5; the bottom of the electric push rod 51 is fixedly connected to a rotating wheel 52; during operation, when the height restriction frame 1 is moved to the limit position, the movable electric push rod 51 drives the multiple sets of rotating wheels 52 below the electric push rod 51 to contact the ground, and then a thrust is applied to the entire height restriction frame 1, which can drive the multiple sets of rotating wheels 52 to rotate, so that the entire height restriction frame 1 moves; through the cooperation of the electric push rod 51 and the rotating wheel 52, the entire height restriction frame 1 can be moved within the workshop, which can increase the convenience of moving the entire height restriction frame 1 when the workshop production layout needs to be adjusted and the height restriction position needs to be temporarily changed.
[0032] Reference Figure 1 and Figure 4 As shown, a weighing box 6 is slidably connected to the bottom of the height restriction frame 1; a handle 61 is fixed to the top of the weighing box 6; during operation, after the height restriction frame 1 is installed as a whole, the weighing box 6 can be pulled out from the bottom of the height restriction frame 1, and then a weight-adding block can be placed inside the weighing box 6 to apply gravity to the entire height restriction frame 1; by placing a weight-adding block inside the weighing box 6, the overall weight of the height restriction frame 1 can be increased, reducing damage to the workshop floor.
[0033] Reference Figures 1 to 2 As shown, multiple sets of third fixing seats 7 are fixedly connected to the side wall of the first sliding rod 15; the third fixing seats 7 are arranged in an array on the side wall of the first sliding rod 15; a spotlight 71 is fixedly connected to the top of the third fixing seat 7; during operation, when the light is relatively dim, multiple sets of spotlights 71 can be activated, and the light emitted by the spotlights 71 can illuminate the second sliding rod 17; by illuminating the second sliding rod 17 with the light emitted by the spotlights 71, people at a distance can clearly see the overall height restriction range of the height restriction frame 1, reducing the possibility of not being able to observe the height restriction position due to dim light.
[0034] Reference Figure 3 As shown, a second support base 8 is fixedly connected to the bottom end of the motor 18; the second support base 8 is correspondingly arranged with the motor 18; a blocking ring 81 is fixedly connected to the side wall of the second support base 8; the rope 19 passes through the middle of the blocking ring 81; during operation, the rope 19 runs for a long time, and a lot of contaminants will adhere to its surface. When the motor 18 drives the rope 19 to wind and release, the blocking ring 81 can clean the contaminants adhering to the middle of the rope 19; by cleaning the contaminants by the blocking ring 81 when the rope 19 is running, it is ensured that the surface of the rope 19 remains clean, reducing the contaminants attached to the rope 19 from being wound into the motor 18, which would cause the winding and releasing of the rope 19 to be unsmooth.
[0035] Reference Figure 2As shown, a pair of cleaning blocks 9 are fixedly connected to the top of the second support rod 16; the cleaning blocks 9 are slidably connected to the side wall of the height restriction frame 1; during operation, when the second support rod 16 slides in the middle of the height restriction frame 1, the cleaning blocks 9 can move together with the second support rod 16, and then the cleaning blocks 9 can contact the height restriction frame 1 to clean the contaminants at the sliding part where the height restriction frame 1 and the second support rod 16 are connected; when the cleaning blocks 9 move synchronously with the second support rod 16, the contaminants attached to the middle part of the height restriction frame 1 and the second support rod 16 can be cleaned, reducing the jamming of the sliding part of the second support rod 16 caused by the accumulation of contaminants.
[0036] Reference Figure 5 As shown, a pair of protective pads 10 are fixed to the bottom of the height restriction frame 1; the protective pads 10 are set on the inner side wall of the height restriction frame 1; during operation, when a vehicle passes through the middle of the height restriction frame 1 and touches the side wall of the height restriction frame 1, the protective pads 10 can provide buffer protection for the side of the vehicle; through the buffering effect of the protective pads 10, the direct friction contact between the side of the vehicle and the side of the height restriction frame 1 can be reduced, which may cause damage to the side of the vehicle and the side of the height restriction frame 1, resulting in paint peeling or dents.
[0037] Working principle: The height restriction frame 1 is moved to the desired height restriction location. The overall width of the bridge is then measured. Tension is applied to both sides of the height restriction frame 1. Due to this tension, the first support rod 14 and the second support rod 16 slide from the middle of the first sliding rod 15 and the second sliding rod 17. At this point, the height restriction frame 1 can adjust its overall width using the second sliding rod 17 and the first sliding rod 15. After adjusting the height restriction frame 1 to the specified width, the bolt 13 is rotated to move it to the middle of the first support plate 12 until it is screwed into the side wall of the first support rod 14, fixing the pair of first support rods 14 so that they do not slide against the first sliding rod 15. This allows the overall width of the height restriction frame 1 to be adjusted according to the width of the bridge. After overall adjustment, a pair of motors 18 can be started to drive the rope 19 to rewind, allowing the second support rod 16 to slide up and down in the middle of the height restriction frame 1. When the motor 18 releases the rope 19, the second support rod 16 will descend on the side wall of the height restriction frame 1 due to gravity, thereby adjusting the overall height of the height restriction frame 1. The reflective markings 23 on the side of the first fixed seat 2 can provide a warning when the vehicle is in motion. When the reflective markings 23 have been used for a long time, contaminants will adhere to the surface of the reflective markings 23. At this time, the screw 21 can be rotated, and the slider 22 will slide on the top of the first fixed seat 2 due to the rotation of the screw 21. The scraper 24 can scrape off the contaminants on the surface of the reflective markings 23. When the vehicle height exceeds the specified limit height of the second sliding rod 17 and impacts, it will first impact the rubber. The surface of the rubber pad 32 provides initial cushioning. Subsequently, the buffer plate 31 will cause multiple sets of damping spring telescopic rods 3 to retract due to the impact force, thus cushioning the impact. When the vehicle is unsure whether its height exceeds the limit, it can be slowly moved to the area below the first support seat 4. When the vehicle touches the bell 42 during movement, the bell 42 will ring, indicating that the vehicle height exceeds the standard. When the height limit frame 1 is moved to the limit position, the movable electric push rod 51 will cause multiple sets of rotating wheels 52 below the electric push rod 51 to contact the ground. Then, a pushing force is applied to the entire height limit frame 1, which can drive the multiple sets of rotating wheels 52 to rotate, causing the entire height limit frame 1 to move. After the entire height limit frame 1 is installed, the weighing box 6 can be pulled out from the bottom of the height limit frame 1. 6. An internal weight-adding block is placed to apply gravity to the entire height restriction frame 1. In dim lighting conditions, multiple sets of spotlights 71 can be activated. The light emitted by the spotlights 71 can illuminate the second sliding rod 17. After long-term operation, the surface of the rope 19 will accumulate a lot of contaminants. When the motor 18 drives the rope 19 to wind and release, the blocking ring 81 can clean the contaminants adhering to the middle of the rope 19. When the second support rod 16 slides in the middle of the height restriction frame 1, the cleaning block 9 can move together with the second support rod 16. Then the cleaning block 9 can contact the height restriction frame 1 to clean the contaminants at the sliding part where the height restriction frame 1 connects to the second support rod 16. When a vehicle passes through the middle of the height restriction frame 1 and touches the side wall of the height restriction frame 1, the protective pad 10 can provide cushioning protection for the side of the vehicle.
[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.
Claims
1. A height limiting device for an internal bridge in a workshop, comprising a height limiting frame (1), characterized in that: The height restriction frame (1) has a pair of reference lines (11) fixed to its side wall; the height restriction frame (1) has a pair of first support plates (12) fixed to its side wall; the first support plates (12) are located at the top of the height restriction frame (1); the first support plates (12) are threaded with bolts (13) in the middle; the height restriction frame (1) has a pair of first support rods (14) fixed to its side wall; the first support plates (12) are threaded to the side wall of the first support rods (14); the first support rods (14) are slidably connected to the middle of the first support rods (14) with a first sliding rod (15); the height restriction frame (1) has a pair of second support rods (16) slidably connected to the middle of the height restriction frame (1); the second support rods (16) are slidably connected to the middle of the second support rods (16) with a second sliding rod (17); the bottom of the first support rods (14) has a pair of motors (18) fixed to its bottom; the bottom of the motors (18) has a rope (19) fixed to its bottom; the bottom of the rope (19) is connected to the second sliding rod (17).
2. The height restriction device for an internal bridge in a workshop according to claim 1, characterized in that: The first slide rod (15) is fixedly connected to the top of the first fixed seat (2); the top of the first fixed seat (2) is rotatably connected to the screw (21); the middle of the screw (21) is threadedly connected to the slider (22); the slider (22) is slidably connected to the top of the first fixed seat (2); the side wall of the first fixed seat (2) is fixedly connected to the reflective mark (23); the side wall of the slider (22) is fixedly connected to the scraper (24).
3. The height restriction device for an internal bridge in a workshop according to claim 2, characterized in that: The second slide bar (17) has multiple sets of damping spring telescopic rods (3) fixed to its side wall; a buffer plate (31) is fixed to the middle of the damping spring telescopic rod (3); and a rubber pad (32) is fixed to the top of the buffer plate (31).
4. The height restriction device for an internal bridge in a workshop according to claim 3, characterized in that: The height restriction frame (1) is fixed to the top of a first support base (4); the bottom of the first support base (4) is fixed to a suspension rope (41); the bottom of the suspension rope (41) is fixed to a bell (42).
5. A height-limiting device for an internal bridge in a workshop according to claim 4, characterized in that: The height restriction frame (1) has multiple sets of second fixed seats (5) fixed to its bottom end; an electric push rod (51) is fixed to the top of the second fixed seat (5); the electric push rod (51) passes through the second fixed seat (5); and a rotating wheel (52) is fixed to the bottom end of the electric push rod (51).
6. A height-limiting device for an internal bridge in a workshop according to claim 5, characterized in that: The bottom of the height restriction frame (1) is slidably connected to a weighing box (6); the top of the weighing box (6) is fixedly connected to a handle (61).
7. A height limiting device for an internal bridge in a workshop according to claim 6, characterized in that: The first slide rod (15) has multiple sets of third fixing seats (7) fixedly connected to its side wall; the third fixing seats (7) are arranged in an array on the side wall of the first slide rod (15); a spotlight (71) is fixedly connected to the top of the third fixing seat (7).
8. A height limiting device for an internal bridge in a workshop according to claim 7, characterized in that: The bottom end of the motor (18) is fixedly connected to a second support base (8); the second support base (8) is arranged correspondingly to the motor (18); a blocking ring (81) is fixedly connected to the side wall of the second support base (8); the rope (19) passes through the middle of the blocking ring (81).
9. A height limiting device for an internal bridge in a workshop according to claim 8, characterized in that: A pair of cleaning blocks (9) are fixed to the top of the second support rod (16); the cleaning blocks (9) are slidably connected to the side wall of the height restriction frame (1).
10. A height-limiting device for an internal bridge in a workshop according to claim 9, characterized in that: A pair of protective pads (10) are fixed to the bottom of the height restriction frame (1); the protective pads (10) are set on the inner side wall of the height restriction frame (1).