CN210529559U

CN210529559U - Lifting height limiting frame

Info

Publication number: CN210529559U
Application number: CN201921189537.1U
Authority: CN
Inventors: 曾屹凡; 朱元吉
Original assignee: Hefei Dongfang Transportation Planning And Design Institute Co Ltd
Current assignee: Hefei Dongfang Transportation Planning And Design Institute Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-05-15
Anticipated expiration: 2029-07-25

Abstract

The utility model relates to a lifting height limiting frame, which comprises a portal frame, a height limiting rod connected with the portal frame in a sliding way and a lifting component used for driving the height limiting rod to lift, wherein the portal frame comprises a first upright post, a second upright post and a cross rod; the lifting assembly comprises a first steel wire rope, a second steel wire rope, a first pulley, a second pulley, a third pulley, a fourth pulley and a winding reel, wherein the first steel wire rope, the second steel wire rope, the first pulley, the second pulley and the third pulley are arranged on the first upright post and are rotatably connected with the first upright post; the first steel wire rope winds the first pulley and the second pulley, and the second steel wire rope winds the fourth pulley and the third pulley; one ends, far away from the height limiting rod, of the first steel wire rope and the second steel wire rope are fixed with the winding reel. The utility model discloses can adjust the height of limit for height frame according to overhead road traffic situation, have the effect of adjusting efficient, easy operation.

Description

Lifting height limiting frame

Technical Field

The utility model belongs to the technical field of traffic facilities's technique and specifically relates to a lifting limit for height frame is related to.

Background

With the rapid advance of urban scale expansion, urban traffic travel distance and travel structure are changed greatly, and an elevated road system serving as one of rapid travel carriers is already in a primary scale, so that necessary traffic guidance and appropriate control measures are required to be taken for improving the overhead bridge traffic efficiency and ensuring bridge safety and traffic safety. The method has the advantages that reasonable guidance and management are carried out on vehicles driving into the viaduct, on one hand, the situation that the viaduct is blocked due to the fact that the vehicles are driven into the viaduct disorderly due to traffic accidents or other reasons on the bridge is avoided, on the other hand, the situation that the vehicles are driven into the viaduct due to overload and over-limit vehicles is avoided, fatal damage or other potential safety hazards to the bridge body are avoided, and the traffic management level of the viaduct is greatly improved due to the arrangement of the height-limit vehicles.

Chinese patent No. CN207091966U discloses an adjustable width and height limiting device for highway bridges, which comprises two upright posts and a cross beam disposed at the top ends of the upright posts, wherein the bottom ends of the upright posts are provided with a base, the upright posts comprise fixed upright posts fixedly connected to the base and adjustable upright posts sleeved on the fixed upright posts, and the middle part of the cross beam is provided with a telescopic rod; the upper end of the fixed vertical rod is provided with a manual jack structure, and the upper end of the jack structure props against the internal structure of the adjustable vertical rod. The adjustable width and height limiting device for the highway bridge can be used for adjusting width and height limitation according to emergency or different road sections, can play a certain limiting role, and also can play a role in adjusting different width and height limitations.

The above prior art solutions have the following drawbacks: thereby the pole setting of both sides all is through the pole setting of manual regulation hand lever drive jack structure with adjustable pole setting upwards or move down, the adjustable pole setting of both sides needs two operating personnel to operate to remove, and the pole setting can adjust unanimously with adjustable hardly guaranteeing, leads to the balanced time of crossbeam longer, troublesome poeration, inefficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an over-and-under type limit for height frame can adjust the height of limit for height frame according to overhead road traffic situation, has the effect of adjusting efficient, easy operation.

The above technical purpose of the present invention can be achieved by the following technical solutions: a lifting type height limiting frame comprises a portal frame, a height limiting rod connected with the portal frame in a sliding mode and a lifting assembly used for driving the height limiting rod to lift, wherein the portal frame comprises a first upright column, a second upright column and a cross rod, the first upright column and the second upright column are vertically arranged, and the cross rod is perpendicular to the first upright column and the second upright column; the lifting assembly comprises a first steel wire rope fixed at one end of the height limiting rod close to the first upright post, a second steel wire rope fixed at one end of the height limiting rod close to the second upright post, a first pulley, a second pulley, a third pulley, a fourth pulley and a winding reel, wherein the first pulley, the second pulley and the third pulley are arranged on the first upright post and are rotatably connected with the first upright post, the fourth pulley is arranged on the second upright post and is rotatably connected with the second upright post, and the winding reel is used for winding the first steel wire rope and the second steel wire rope and is driven to rotate by the driving assembly; the first pulley and the second pulley are at the same height, the first steel wire rope is wound around the first pulley and the second pulley, the third pulley is arranged above the first pulley, and the second steel wire rope is wound around the fourth pulley and the third pulley; and one ends of the first steel wire rope and the second steel wire rope, which are far away from the height limiting rod, are fixed with the winding reel.

By adopting the technical scheme, when the height of the height-limiting rod needs to be adjusted, the driving assembly drives the winding reel to rotate, the winding reel rotates to realize the winding and unwinding of the first steel wire rope and the second steel wire rope, the first steel wire rope and the second steel wire rope are tightened when the height-limiting rod ascends, and the first steel wire rope and the second steel wire rope are loosened when the height-limiting rod is put on the shelf. The arranged first pulley and the second pulley play roles in turning and guiding the first steel wire rope, so that the first steel wire rope is prevented from being wound; the third pulley and the fourth pulley play the roles of turning and guiding the second steel wire rope, and the second steel wire rope is prevented from being wound.

The utility model discloses further set up to: the driving assembly comprises a control box fixed at the bottom end of the first upright post, a motor fixed in the control box and a speed reducer connected with the motor, the motor is connected with the speed reducer through an elastic coupling, one end of the elastic coupling is fixed with an output shaft of the motor, and the other end of the elastic coupling is fixed with the speed reducer; one end of the winding reel is rotatably connected with the side wall of the control box, and the other end of the winding reel is connected with the speed reducer in a key mode.

Through adopting above-mentioned technical scheme, starter motor through the reduction gear, reduces the spool pivoted frequency to reduce the speed that limit for height pole goes up and down, make the more steady going on of limit for height pole lift.

The utility model discloses further set up to: a first C-shaped steel is fixed on the side wall of the first upright column, a second C-shaped steel is fixed on the side wall of the second upright column, and the first C-shaped steel and the second C-shaped steel are arranged oppositely; and two ends of the height limiting rod are respectively and rotatably connected with a first roller in rolling fit with the first C-shaped steel and a second roller in rolling fit with the second C-shaped steel.

Through adopting above-mentioned technical scheme, set up first gyro wheel and first C shaped steel roll cooperation, second gyro wheel and second C shaped steel roll cooperation have the guide effect to the lift of limit for height pole, avoid external environment factor to lead to limit for height pole to remove the in-process and rock, and roll complex mode frictional force is little.

The utility model discloses further set up to: first limiting blocks are fixed at the upper end and the lower end of the first C-shaped steel, and second limiting blocks are fixed at the upper end and the lower end of the second C-shaped steel.

Through adopting above-mentioned technical scheme, set up first stopper and can avoid the limit for height pole to break away from first C shaped steel at the lift in-process, set up the second stopper and can avoid the limit for height pole to break away from second C shaped steel at the lift in-process.

The utility model discloses further set up to: the lower end of the height limiting rod is connected with a collision sensor control rod through a support rod, an alarm is fixed at the upper end of the height limiting rod, and the alarm is electrically connected with the collision sensor control rod.

By adopting the technical scheme, when a vehicle exceeding the limit height passes through, the vehicle can touch the control rod of the collision sensor to trigger the alarm to give an alarm, so that a driver is reminded of taking corresponding safety measures in time or reminding a traffic police at a road junction to maintain the traffic order to deal with the traffic police.

The utility model discloses further set up to: rectangular seams are evenly arranged on the side wall of the height limiting rod along the advancing direction of the automobile.

Through adopting above-mentioned technical scheme, limit for height the pole receiving impact force effect down, rectangle seam department can produce deformation, along with the increase of impact force, rectangle seam grow, until limit for height the pole fracture, so set up and can avoid the portal frame to warp or topple.

The utility model discloses further set up to: the cross rod comprises a first connecting rod which is vertical to the first upright column and is in sliding connection with the first upright column, a second connecting rod which is vertical to the second upright column and is in sliding connection with the second upright column, and a main rod which is connected with the first connecting rod and the second connecting rod, wherein two ends of the main rod are respectively connected with the first connecting rod and the second connecting rod through flange plates; the first connecting rod and the second connecting rod are fixed through a fixing component.

Through adopting above-mentioned technical scheme, because the width of overhead crossing department road is different, mobile jib length is fixed the back, at the actual installation in-process, will adjust the position of first connecting rod and second connecting rod according to the road surface width, so set up, make this portal frame can be fit for the road surface of multiple width and use to enlarge the application scope of this portal frame.

The utility model discloses further set up to: the fixing assembly comprises a first U-shaped frame and a second U-shaped frame, the inner walls of two sides of the first U-shaped frame are respectively fixed with the side walls of two sides of the first upright post, and the end parts of the side plates of two sides of the first U-shaped frame are fixed with the first connecting rod; the inner walls of two sides of the second U-shaped frame are fixed with the side walls of two sides of the second upright post respectively, and the end parts of the side plates of two sides of the second U-shaped frame are fixed with the second connecting rod.

By adopting the technical scheme, after the first connecting rod is adjusted, the first U-shaped frame is installed, the first connecting rod is prevented from continuously sliding, and after the second connecting rod is adjusted, the second U-shaped frame is installed, and the second connecting rod is prevented from continuously sliding.

The utility model discloses further set up to: a first bottom plate is fixed on the bottom surface of the first upright post, the cross sectional area of the first bottom plate is larger than that of the first upright post, a first reinforcing plate is arranged on the first upright post, and two adjacent edges of the first reinforcing plate are respectively fixed with the side wall of the first upright post and the first bottom plate; the bottom surface of the second upright post is fixedly provided with a second bottom plate, the cross sectional area of the second bottom plate is larger than that of the second upright post, the second upright post is provided with a second reinforcing plate, and two adjacent edges of the second reinforcing plate are respectively fixed with the side wall of the second upright post and the second bottom plate.

By adopting the technical scheme, the contact area between the first bottom plate and the ground is large, and the connection degree between the first upright post and the ground can be improved; the contact area of second bottom plate and ground is big, can improve the joint strength between second stand and the ground. The first reinforcing plate and the second reinforcing plate are arranged, so that the connecting strength between the first stand column and the first bottom plate can be improved, and the second reinforcing plate is arranged so that the connecting strength between the second stand column and the second bottom plate can be improved, so that the overall strength of the portal frame is improved.

The utility model discloses further set up to: the traffic sign board is fixed on the main rod, the limit height pole is fixed with the limit sign board, and the main rod and the limit height pole are fixed with warning reflective membrane.

Through adopting above-mentioned technical scheme, fixed traffic sign board can provide traffic information for the passing vehicle on the mobile jib, and the clear warning of driver is given to the limit for height denoter that sets up on the limit for height pole, avoids the driver through the range estimation height, drives the vehicle through bringing the potential safety hazard. The warning reflective membrane that sets up is shone the back by the car light at night, and light reflection improves the distance that the driver discovers the place ahead object to give the more abundant time of driver, take corresponding safety measure.

To sum up, the utility model discloses a beneficial technological effect does:

1. when the height limiting rod ascends, the first steel wire rope and the second steel wire rope are tightened, when the height limiting rod is put on the shelf, the first steel wire rope and the second steel wire rope are loosened, and the arranged first pulley and the second pulley play roles in turning and guiding the first steel wire rope, so that the first steel wire rope is prevented from being wound; the third pulley and the fourth pulley play roles in turning and guiding the second steel wire rope, so that the second steel wire rope is prevented from being wound;

2. the first roller is arranged to be in rolling fit with the first C-shaped steel, the second roller is arranged to be in rolling fit with the second C-shaped steel, the guide effect on the lifting of the height limiting rod is achieved, the height limiting rod is prevented from shaking in the moving process due to external environmental factors, and the friction force of the rolling fit mode is small;

3. offer the rectangle seam on the lateral wall of limit for height pole, limit for height pole is receiving the impact force effect down, and rectangle seam department can produce deformation, and along with the increase of impact force, the grow is sewed up to limit for height pole fracture, so set up and can avoid the portal frame to warp or topple.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of the explosion structure of the present invention;

fig. 3 is a schematic structural diagram of the driving assembly of the present invention.

Reference numerals: 1. a gantry; 11. a first upright post; 111. a first base plate; 112. a first reinforcing plate; 12. a second upright post; 121. a second base plate; 122. a second reinforcing plate; 13. a cross bar; 131. a first link; 132. a second link; 133. a main rod; 134. a flange plate; 135. a sign board; 14. a fixing assembly; 141. a first U-shaped frame; 142. a second U-shaped frame; 15. a first C-section steel; 151. a first stopper; 16. a second C-shaped steel; 161. a second limiting block; 2. a height limiting rod; 21. a first roller; 22. a second roller; 23. a strut; 24. a crash sensor lever; 25. an alarm; 26. a rectangular slit; 27. a limiting sign board; 3. a lifting assembly; 31. a first wire rope; 32. a second wire rope; 33. a first pulley; 34. a second pulley; 35. a third pulley; 36. a fourth pulley; 37. a spool; 371. a retainer ring; 4. a drive assembly; 41. a control box; 42. a motor; 43. a speed reducer; 44. an elastic coupling; 5. warning reflective film.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-2, for the utility model discloses a lifting height-limiting frame, including portal frame 1, with portal frame 1 sliding connection's height-limiting rod 2 and be used for driving the lifting unit 3 that height-limiting rod 2 goes up and down.

As shown in fig. 1, the gantry 1 includes a first upright 11, a second upright 12 and a cross bar 13, the first upright 11, the second upright 12 and the cross bar 13 are made of square steel, the first upright 11 and the second upright 12 are vertically arranged, and the cross bar 13 is horizontally arranged. The cross bar 13 includes a first connecting rod 131, a second connecting rod 132 and a main rod 133, the first connecting rod 131 passes through the side wall of the upper end of the first upright 11 and is slidably connected to the first upright 11, the second connecting rod 132 passes through the side wall of the upper end of the second upright 12 and is slidably connected to the second upright 12, and two ends of the main rod 133 are respectively fixedly connected to the first connecting rod 131 and the second connecting rod 132 through flanges 134. The first connecting rod 131 and the second connecting rod 132 are fixed with the first upright post 11 and the second upright post 12 through the fixing component 14, the fixing component 14 comprises a first U-shaped frame 141 and a second U-shaped frame 142, the inner walls of the side plates on two sides of the first U-shaped frame 141 are fixed with the side wall of the first upright post 11, the end parts of the side plates on two sides are fixed with the first connecting rod 131, the inner walls of the side plates on two sides of the second U-shaped frame 142 are fixed with the side wall of the second upright post 12, and the end parts of the side plates on two sides are fixed with the second connecting rod 132. Because the width of the road at the elevated intersection is different, the length of the main rod 133 is fixed, and then the positions of the first connecting rod 131 and the second connecting rod 132 are adjusted according to the width of the road surface in the actual installation process, so that the portal frame 1 can be suitable for the road surfaces with various widths, and the application range of the portal frame 1 is expanded.

As shown in fig. 1, a first bottom plate 111 is fixed to a bottom surface of the first upright 11, a cross-sectional area of the first bottom plate 111 is larger than a cross-sectional area of the first upright 11, a first reinforcing plate 112 is disposed on the first upright 11, and two adjacent edges of the first reinforcing plate 112 are respectively fixed to a side wall of the first upright 11 and the first bottom plate 111. A second bottom plate 121 is fixed on the bottom surface of the second upright 12, the cross-sectional area of the second bottom plate 121 is larger than that of the second upright 12, a second reinforcing plate 122 is arranged on the second upright 12, and two adjacent edges of the second reinforcing plate 122 are respectively fixed with the side wall of the second upright 12 and the second bottom plate 121. The connection strength between the first upright post 11 and the second upright post 12 and the ground is increased, so that the overall strength of the portal frame 1 is improved.

As shown in fig. 2, a first C-section steel 15 and a second C-section steel 16 are fixed to the side surfaces of the first pillar 11 and the second pillar 12 facing the driving direction of the automobile, respectively, and the first C-section steel 15 and the second C-section steel 16 are disposed opposite to each other. Height-limiting rod 2 is aluminium square pole, and the both ends of height-limiting rod 2 rotate respectively to be connected with first C shaped steel 15 roll complex first gyro wheel 21, with second C shaped steel 16 roll connection's second gyro wheel 22, and first gyro wheel 21 and second gyro wheel 22 are the rubber wheel, and both ends are fixed with first stopper 151 respectively about first C shaped steel 15, and second C shaped steel 16 both ends are fixed with second stopper 161 respectively. Set up first gyro wheel 21 and the cooperation of rolling of first C shaped steel 15, second gyro wheel 22 and the cooperation of rolling of second C shaped steel 16 have the guide effect to the lift of limit for height pole 2, avoid external environment factor to lead to limit for height pole 2 to remove the in-process and rock, and roll complex mode frictional force is little.

As shown in fig. 2-3, the lifting assembly 3 includes a first cable 31, a second cable 32, a first pulley 33, a second pulley 34, a third pulley 35, a fourth pulley 36, and a winding reel 37, the first cable 31 is fixed to an end of the height-limiting rod 2 near the first column 11, and the second cable 32 is fixed to an end of the height-limiting rod 2 near the second column 12. The first pulley 33 and the second pulley 34 are located above the first C-shaped steel 15 and are rotatably connected with the first upright post 11, the first pulley 33 and the second pulley 34 are at the same height, and the first steel wire rope 31 sequentially passes around the first pulley 33 and the second pulley 34. Third pulley 35 is above first pulley 33 and is connected with first stand 11 rotation, and fourth pulley 36 and third pulley 35 are at same height and fourth pulley 36 and second stand 12 rotation are connected, and second wire rope 32 is in proper order around fourth pulley 36 and third pulley 35. The middle of the winding reel 37 is fixedly sleeved with a retaining ring 371 for dividing the winding reel 37 into two winding areas, and one ends of the first steel wire rope 31 and the fourth steel wire rope far away from the height limiting rod 2 are respectively fixed with the winding reels 37 on two sides of the retaining ring 371.

As shown in fig. 3, the winding reel 37 is driven to rotate by the driving assembly 4, the driving assembly 4 includes a control box 41, a motor 42, a speed reducer 43 and an elastic coupling 44, the control box 41 is a rectangular parallelepiped box with a hollow interior, and the control box 41 is fixed at the lower end of the first upright 11. The motor 42 is fixed in the control box 41, the output shaft of the motor 42 is horizontally arranged, one end of the elastic coupling 44 is fixedly connected with the motor 42, the other end of the elastic coupling is fixedly connected with the speed reducer 43, one end of the winding reel 37 is rotatably connected with the side wall of the control box 41, and the other end of the winding reel is connected with the speed reducer 43. The motor 42 is started, and the rotating frequency of the winding reel 37 is reduced through the speed reducer 43, so that the lifting speed of the height limiting rod 2 is reduced, and the lifting of the height limiting rod 2 is more stably carried out.

As shown in figure 1, the lower end of the height limiting rod 2 is connected with a collision sensor control rod 24 through a support rod 23, the collision sensor control rod 24 is parallel to the height limiting rod 2, an alarm 25 is fixed at the upper end of the height limiting rod 2, and the alarm 25 is electrically connected with the collision sensor control rod 24. When a vehicle with the height exceeding the limit height passes, the vehicle can touch the collision sensor control rod 24 to trigger the alarm 25 to give an alarm, so that a driver is reminded to take corresponding safety measures in time or a traffic police for maintaining the traffic order at the intersection is reminded to take treatment. Combine fig. 2, evenly seted up rectangular seam 26 along car advancing direction on the 2 lateral walls of limit for height pole, limit for height pole 2 receiving the impact force effect under, rectangular seam 26 department can produce deformation, along with the increase of impact force, rectangular seam 26 grow, until limit for height pole 2 fracture, portal frame 1 deformation or topple can be avoided in this setting.

As shown in fig. 1, a sign board 135 is fixed on the main rod 133, a position-limiting sign 27 is fixed on the height-limiting rod 2, and a warning reflective film 5 is fixed on the main rod 133 and the height-limiting rod 2. Fixed traffic sign board 135 can provide traffic information for the vehicle of passing on mobile jib 133, and the limit for height signboard that sets up on limit for height pole 2 gives the striking warning of driver, avoids the driver through the range estimation height, drives the vehicle through bringing the potential safety hazard. The warning reflective membrane 5 that sets up is shone the back by the car light at night, and light reflection improves the distance that the driver found the place ahead object to give the more abundant time of driver, take corresponding safety measure.

The implementation principle of the embodiment is as follows: when the height of the height limiting rod 2 needs to be adjusted, the starting motor 42 drives the winding reel 37 to rotate, the winding reel 37 rotates to achieve winding and unwinding of the first steel wire rope 31 and the second steel wire rope 32, and the height limitation is actually the height from the collision sensor control rod 24 to the road surface. When the height limiting rod 2 ascends, the first steel wire rope 31 and the second steel wire rope 32 are tightened, and the first steel wire rope 31 and the second steel wire rope 32 drive the height limiting rod 2 to stably ascend in the length direction of the first C-shaped steel 15 and the second C-shaped steel 16. When the height limiting rod 2 is put on the shelf, the first steel wire rope 31 and the second steel wire rope 32 are loosened, and the first steel wire rope 31 and the second steel wire rope 32 drive the height limiting rod 2 to stably descend.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a lift-type limit for height frame, includes portal frame (1), limit for height pole (2) and be used for driving hoisting component (3) that limit for height pole (2) go up and down with portal frame (1) sliding connection, portal frame (1) includes first stand (11), second stand (12) of two vertical settings and with first stand (11) and the perpendicular horizontal pole (13) that set up of second stand (12), its characterized in that: the lifting assembly (3) comprises a first steel wire rope (31) fixed at one end, close to the first upright post (11), of the height limiting rod (2), a second steel wire rope (32) fixed at one end, close to the second upright post (12), of the height limiting rod (2), a first pulley (33), a second pulley (34) and a third pulley (35) which are arranged on the first upright post (11) and rotatably connected with the first upright post (11), a fourth pulley (36) which is arranged on the second upright post (12) and rotatably connected with the second upright post (12), and a winding reel (37) used for winding the first steel wire rope (31) and the second steel wire rope (32), wherein the winding reel (37) is driven to rotate by the driving assembly (4); the first pulley (33) and the second pulley (34) are at the same height, the first wire rope (31) passes around the first pulley (33) and the second pulley (34), the third pulley (35) is above the first pulley (33), and the second wire rope (32) passes around the fourth pulley (36) and the third pulley (35); one ends, far away from the height limiting rod (2), of the first steel wire rope (31) and the second steel wire rope (32) are fixed with the winding reel (37).

2. The lifting type height limiting frame according to claim 1, wherein: the driving assembly (4) comprises a control box (41) fixed at the bottom end of the first upright post (11), a motor (42) fixed in the control box (41) and a speed reducer (43) connected with the motor (42), the motor (42) is connected with the speed reducer (43) through an elastic coupling (44), one end of the elastic coupling (44) is fixed with an output shaft of the motor (42), and the other end of the elastic coupling (44) is fixed with the speed reducer (43); one end of the winding reel (37) is rotatably connected with the side wall of the control box (41), and the other end of the winding reel is connected with the speed reducer (43) in a key mode.

3. The lifting type height limiting frame according to claim 1, wherein: a first C-shaped steel (15) is fixed on the side wall of the first upright column (11), a second C-shaped steel (16) is fixed on the side wall of the second upright column (12), and the first C-shaped steel (15) and the second C-shaped steel (16) are arranged oppositely; and two ends of the height limiting rod (2) are respectively and rotatably connected with a first roller (21) in rolling fit with the first C-shaped steel (15) and a second roller (22) in rolling fit with the second C-shaped steel (16).

4. The lifting type height limiting frame according to claim 3, wherein: first stopper (151) all are fixed with at both ends about first C shaped steel (15), both ends all are fixed with second stopper (161) about second C shaped steel (16).

5. The lifting type height limiting frame according to claim 1, wherein: the height limiting rod is characterized in that the lower end of the height limiting rod (2) is connected with a collision sensor control rod (24) through a support rod (23), an alarm (25) is fixed to the upper end of the height limiting rod (2), and the alarm (25) is electrically connected with the collision sensor control rod (24).

6. The lifting type height limiting frame according to claim 1, wherein: rectangular seams (26) are uniformly arranged on the side wall of the height limiting rod (2) along the advancing direction of the automobile.

7. The lifting type height limiting frame according to claim 1, wherein: the cross rod (13) comprises a first connecting rod (131) which is perpendicular to the first upright column (11) and is in sliding connection with the first upright column (11), a second connecting rod (132) which is perpendicular to the second upright column (12) and is in sliding connection with the second upright column (12), and a main rod (133) which is connected with the first connecting rod (131) and the second connecting rod (132), wherein two ends of the main rod (133) are respectively connected with the first connecting rod (131) and the second connecting rod (132) through flanges (134); the first link (131) and the second link (132) are fixed by a fixing assembly (14).

8. The lifting type height limiting frame according to claim 7, wherein: the fixing assembly (14) comprises a first U-shaped frame (141) and a second U-shaped frame (142), the inner walls of two sides of the first U-shaped frame (141) are respectively fixed with the side walls of two sides of the first upright post (11), and the end parts of the side plates of two sides of the first U-shaped frame (141) are fixed with the first connecting rod (131); the inner walls of two sides of the second U-shaped frame (142) are respectively fixed with the side walls of two sides of the second upright post (12), and the end parts of the side plates of two sides of the second U-shaped frame (142) are fixed with the second connecting rod (132).

9. The lifting type height limiting frame according to claim 1, wherein: a first bottom plate (111) is fixed on the bottom surface of the first upright post (11), the cross sectional area of the first bottom plate (111) is larger than that of the first upright post (11), a first reinforcing plate (112) is arranged on the first upright post (11), and two adjacent edges of the first reinforcing plate (112) are respectively fixed with the side wall of the first upright post (11) and the first bottom plate (111); a second bottom plate (121) is fixed on the bottom surface of the second upright column (12), the cross sectional area of the second bottom plate (121) is larger than that of the second upright column (12), a second reinforcing plate (122) is arranged on the second upright column (12), and two adjacent sides of the second reinforcing plate (122) are respectively fixed with the side wall of the second upright column (12) and the second bottom plate (121).

10. The lifting type height limiting frame according to claim 7, wherein: be fixed with denoter (135) on mobile jib (133), be fixed with spacing denoter (27) on limit for height pole (2), mobile jib (133) with be fixed with warning reflective membrane (5) on limit for height pole (2).