CN213333131U

CN213333131U - Road warning sign is used in highway construction

Info

Publication number: CN213333131U
Application number: CN202020523906.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: Jilin Communications Industry Development Co ltd
Current assignee: Jilin Communications Industry Development Co ltd
Priority date: 2020-04-11
Filing date: 2020-04-11
Publication date: 2021-06-01
Anticipated expiration: 2030-04-11

Abstract

The utility model discloses a road warning sign is used in highway construction, include: the trailer comprises a trailer body, a control box, a storage battery, a fixed seat, a rotating shaft, a telescopic mechanism, a rotating mechanism, an LED display screen and a storage box; the control device is arranged at the right front of the trailer main body; the storage battery is arranged on the front side of the bottom end of the trailer main body along the left-right direction; the two fixing seats are respectively arranged at the left end and the right end of the rear side of the top end of the trailer main body; the rotating shaft is rotatably connected to the inner sides of the left and right fixed seats along the left and right directions through bearings; the telescopic mechanism is arranged at the center of the outer wall of the rotating shaft along the vertical direction; the rotating mechanism is arranged at the top end of the telescopic mechanism; the LED display screen is arranged at the top end of the rotating mechanism; the storage box is installed at the top front side of the trailer main body. This road warning sign is used in highway construction can be convenient for the protection is accomodate when highway construction warning sign removes to can adjust highway construction warning sign height and angle.

Description

Road warning sign is used in highway construction

Technical Field

The utility model relates to a highway construction technical field specifically is a road warning sign is used in highway construction.

Background

The highway is a modern term, is a public road capable of driving automobiles, a road capable of driving public vehicles, and can be used for driving automobiles, single vehicles, rickshaws, horses and other vehicles and pedestrians, different highway restrictions are different, and the civil road is also called a road, such as the usage in road angel, and is not limited to be special for the road;

in the prior art, the highway construction warning sign is mostly fixed structure comparatively simple, and the warning sign of being inconvenient for removes to can't adjust the height and the angle of warning sign, lead to the warning sign suitability relatively poor, we propose a road warning sign for highway construction to above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a road warning sign is used in highway construction to at least, the highway construction warning sign of solving prior art is mostly fixed structure comparatively simple, and the warning sign of being not convenient for removes, and can't adjust the height and the angle of warning sign, leads to the relatively poor problem of warning sign suitability.

In order to achieve the above object, the utility model provides a following technical scheme: a road warning sign for highway construction, comprising:

a trailer body;

a control box installed at a right front of the trailer body;

the storage battery is arranged on the front side of the bottom end of the trailer main body in the left-right direction and is electrically connected with the control box;

the number of the fixed seats is two, and the two fixed seats are respectively arranged at the left end and the right end of the rear side of the top end of the trailer main body;

the rotating shaft is rotatably connected to the inner sides of the left fixing seat and the right fixing seat along the left-right direction through bearings, an inner ring of each bearing is in interference fit with the outer wall of the rotating shaft, and an outer ring of each bearing is fixedly connected with the inner wall of each fixing seat;

the telescopic mechanism is arranged at the center of the outer wall of the rotating shaft along the vertical direction;

the rotating mechanism is arranged at the top end of the telescopic mechanism;

the LED display screen is arranged at the top end of the rotating mechanism and is electrically connected with the control box;

and a storage box mounted on the front side of the top end of the trailer body.

Preferably, the telescopic mechanism includes: the device comprises a supporting seat, a guide rail, a shell, a hand wheel, a first bevel gear, a mounting seat, a hydraulic cylinder and a connecting seat; the number of the supporting seats is two, and the two supporting seats are in interference fit with the left side and the right side of the middle part of the outer wall of the rotating shaft along the vertical direction; the guide rail is arranged at the top ends of the left and right supporting seats along the up-down direction; the shell is arranged at the center of the bottom end of the guide rail along the front-back direction; the hand wheel is rotatably connected to the center of the front side of the inner cavity of the shell through a bearing in the front-back direction, and the front side of the hand wheel extends out of the outer wall of the shell; the first conical gear screw is connected to the rear side of the hand wheel; the mounting seat is mounted on the rear side of the inner cavity of the trailer main body along the front-rear direction; one end of the hydraulic cylinder is rotatably connected to the inner side of the mounting seat through a pin shaft, and the hydraulic cylinder is electrically connected with the control box; the connecting seat is arranged at the center of the rear side of the guide rail, and the inner side of the connecting seat is rotatably connected with the other end of the hydraulic cylinder through a pin shaft.

Preferably, the telescopic mechanism further comprises: the second bevel gear, the screw rod and the screw rod nut plate; the second bevel gear is rotatably connected to the rear side of the bottom end of the inner cavity of the shell through a rotating shaft and is meshed with the first bevel gear; the screw rod is connected to the top end of the second bevel gear along the vertical direction through a screw, and the top end of the screw rod penetrates through the outer wall of the shell and extends into the inner cavity of the guide rail; the guide rail is characterized in that the screw rod nut plate is inserted into the inner cavity of the guide rail in the vertical direction, the top end of the screw rod nut plate extends out of the upper surface of the guide rail, and the bottom end of the inner cavity of the screw rod nut plate is in threaded connection with the top end of the outer wall of the screw rod.

Preferably, the telescopic mechanism further comprises: the bolt, the brake plate and the limiting spring; the bolt is screwed at the corresponding position of the front side of the top end of the shell and the hand wheel along the up-down direction, and the bottom end of the bolt extends into the inner cavity of the shell; the brake plate is rotatably connected to the bottom end of the bolt through a bearing in the front-back direction, an inner ring of the bearing is in interference fit with the outer wall of the bolt, an outer ring of the bearing is fixedly connected with the inner wall of the brake plate, and the inner wall of the brake plate is attached to the outer wall of the hand wheel; the number of the limiting springs is two, the two limiting springs are respectively arranged on the front side and the rear side of the top end of the brake plate along the up-down direction, and the top ends of the limiting springs are fixedly connected with the inner wall of the shell.

Preferably, the rotating mechanism includes: the rotating mechanism comprises a rotating mechanism shell, a rotating seat, a worm wheel, a stepping motor and a worm; the rotating mechanism shell is arranged at the top end of the LED display screen; the rotating seat is rotatably connected to the right center position of the bottom end of the inner cavity of the rotating mechanism shell through a bearing in the vertical direction, an inner ring of the bearing is in interference fit with the outer wall of the rotating seat, an outer ring of the bearing is fixedly connected with the inner wall of the rotating mechanism shell, and the top end of the rotating seat extends out of the upper surface of the rotating mechanism shell and is fixedly connected with the bottom end of the LED display screen; the worm gear is connected below the outer wall of the rotating seat in a key manner; the stepping motor is arranged at the left end of the front side of the rotating mechanism shell along the front-back direction, the output end of the rotating seat extends into the inner cavity of the rotating mechanism shell, and the stepping motor is electrically connected with the control box; the worm is connected to the output end of the stepping motor along the front and back direction screws, and the worm is meshed with the worm wheel.

Compared with the prior art, the beneficial effects of the utility model are that: the road warning board for highway construction drives the brake plate to move upwards to be separated from the contact with the outer wall of the hand wheel by screwing the bolt upwards, so that the fixation of the hand wheel is released, the hand wheel is rotated to drive the first conical gear to rotate anticlockwise or clockwise, the second conical gear drives the screw rod to rotate clockwise or anticlockwise under the action of the rotating force of the first conical gear, the screw rod nut plate drives the rotating mechanism to drive the LED display screen to move upwards or downwards to a specified height under the action of the rotating force of the screw rod, the worm is driven to rotate by the stepping motor, the worm wheel drives the rotating seat to drive the LED display screen to rotate clockwise to a specified angle under the action of the rotating force of the worm, the hydraulic cylinder is lengthened and shortened by itself, and the hydraulic cylinder is driven to rotate forwards or backwards by taking the rotating connection part with the pin shaft of the mounting seat as a vertex in, and pulling telescopic machanism under the cooperation of connecting seat and using pivot and fixing base bearing to rotate the junction and incline the rotation to the front side or the backward side for the summit, and then accomplish the LED display screen and support and accomodate to accomodate the protection when can be convenient for highway construction warning sign removes, and can adjust highway construction warning sign height and angle.

Drawings

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

FIG. 2 is an exploded view of the telescoping mechanism of FIG. 1;

fig. 3 is an exploded view of the rotating mechanism of fig. 1.

In the figure: 1. trailer main part, 2, control box, 3, battery, 4, fixing base, 5, pivot, 6, telescopic machanism, 61, supporting seat, 62, guide rail, 63, casing, 64, hand wheel, 65, first conical gear, 66, second conical gear, 67, lead screw, 68, lead screw nut board, 69, bolt, 610, braking board, 611, spacing spring, 7, slewing mechanism, 71, slewing mechanism shell, 72, swivel mount, 73, worm wheel, 74, worm, 75, step motor, 8, LED display screen, 9, mount pad, 10, pneumatic cylinder, 11, connecting seat, 12, containing box.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a road warning sign for highway construction, comprising: the trailer comprises a trailer body 1, a control box 2, a storage battery 3, a fixed seat 4, a rotating shaft 5, a telescopic mechanism 6, a rotating mechanism 7, an LED display screen 8 and an accommodating box 12, wherein the trailer body 1 can be connected with an external tractor so as to facilitate the movement of the device; the control box 2 is installed at the right front part of the trailer body 1, and the specific use model of the control box 2 is directly purchased from the market and installed and used according to the actual use requirement; the storage battery 3 is arranged on the front side of the bottom end of the trailer main body 1 in the left-right direction, the storage battery 3 is electrically connected with the control box 2, the storage battery 3 is directly purchased, installed and used from the market according to actual use requirements, and the storage battery 3 can be connected with an external power supply to charge for supplying power to electric devices in the device; the number of the fixed seats 4 is two, and the two fixed seats 4 are respectively arranged at the left end and the right end of the rear side of the top end of the trailer main body 1; the rotating shaft 5 is rotatably connected to the inner sides of the left and right fixed seats 4 through bearings in the left and right directions, the inner ring of each bearing is in interference fit with the outer wall of the rotating shaft 5, and the outer ring of each bearing is fixedly connected with the inner wall of each fixed seat 4; the telescopic mechanism 6 is arranged at the center of the outer wall of the rotating shaft 5 along the vertical direction; the rotating mechanism 7 is arranged at the top end of the telescopic mechanism 6; the LED display screen 8 is installed at the top end of the rotating mechanism 7, the LED display screen 8 is electrically connected with the control box 2, the specific usage model of the LED display screen 8 is directly purchased, installed and used from the market according to the actual usage requirement, the control box 2 controls the display screen in the LED display screen 8 to display the designated warning slogan and patterns, and the top end of the LED display screen 8 is provided with a rainproof cover plate; storage box 12 is installed at the top front side of trailer main part 1, and storage box 12 is waterproof material and inside leakproofness is good to play the guard action to LED display screen 8.

Preferably, the telescopic mechanism 6 further comprises: the device comprises a supporting seat 61, a guide rail 62, a shell 63, a hand wheel 64, a first bevel gear 65, a mounting seat 9, a hydraulic cylinder 10 and a connecting seat 11; the number of the supporting seats 61 is two, the two supporting seats 61 are in interference fit with the left side and the right side of the middle part of the outer wall of the rotating shaft 5 along the vertical direction, and the rotating connection position of the supporting seats 61, the rotating shaft 5 and the bearing of the fixed seat 4 can be in top point inclined rotation towards the front side; the guide rail 62 is arranged at the top ends of the left and right support seats 61 along the up-down direction, and the guide rail 62 can limit the screw nut plate 68; the housing 63 is disposed at the bottom center position of the guide rail 62 in the front-rear direction; the hand wheel 64 is rotatably connected to the center of the front side of the inner cavity of the shell 63 through a bearing in the front-back direction, the front side of the hand wheel 64 extends out of the outer wall of the shell 63, and a rotating wheel is arranged on the front side of the hand wheel 64 so as to be convenient for a worker to hold and rotate; the first bevel gear 65 is connected to the rear side of the hand wheel 64 through a screw, and the hand wheel 64 can drive the first bevel gear 65 to rotate anticlockwise or clockwise; the mounting seat 9 is mounted on the rear side of the inner cavity of the trailer body 1 along the front-rear direction; one end of a hydraulic cylinder 10 is rotatably connected to the inner side of the mounting base 9 through a pin shaft, the hydraulic cylinder 10 is electrically connected with the control box 2, the hydraulic cylinder 10 is directly purchased from the market and installed and used according to actual use requirements, and the hydraulic cylinder 10 is controlled by the control box 2 to be extensible and contractible; the connecting base 11 is installed at the rear center position of the guide rail 62, the inner side of the connecting base 11 is rotatably connected with the other end of the hydraulic cylinder 10 through a pin shaft, the hydraulic cylinder 10 can be inclined and rotated towards the front side by taking the rotating connection position of the pin shaft with the installation base 9 as a vertex in the self-shortening process, and the guide rail 62 is pulled to move towards the front side or the rear side under the matching of the connecting base 11.

Preferably, the telescopic mechanism 6 further comprises: a second bevel gear 66, a lead screw 67, and a lead screw nut plate 68; the second bevel gear 66 is rotatably connected to the rear side of the bottom end of the inner cavity of the housing 63 through a rotating shaft, the second bevel gear 66 is meshed with the first bevel gear 65, and the second bevel gear 66 can rotate clockwise or anticlockwise under the rotating force of the first bevel gear 65; a screw rod 67 is screwed to the top end of the second bevel gear 66 along the vertical direction, and the top end of the screw rod 67 penetrates through the outer wall of the housing 63 and extends into the inner cavity of the guide rail 62; the screw nut plate 68 is inserted into the inner cavity of the guide rail 62 in the up-down direction, the top end of the screw nut plate 68 extends out of the upper surface of the guide rail 62, the bottom end of the inner cavity of the screw nut plate 68 is screwed with the top end of the outer wall of the screw rod 67, and the screw nut plate 68 can move up or down along the inner cavity of the guide rail 62 under the rotating force of the screw rod 67.

Preferably, the telescopic mechanism 6 further comprises: a bolt 69, a brake plate 610 and a limit spring 611; the bolt 69 is screwed at the front side of the top end of the shell 63 and at the corresponding position of the hand wheel 64 along the up-down direction, and the bottom end of the bolt 69 extends into the inner cavity of the shell 63; the brake plate 610 is rotatably connected to the bottom end of the bolt 69 through a bearing in the front-back direction, the inner ring of the bearing is in interference fit with the outer wall of the bolt 69, the outer ring of the bearing is fixedly connected with the inner wall of the brake plate 610, the inner wall of the brake plate 610 is attached to the outer wall of the hand wheel 64, and the brake plate 610 realizes brake fixing of the hand wheel 64 through friction force between the inner wall of the brake plate 610 and the outer wall of the hand wheel 64; the number of the limiting springs 611 is two, the two limiting springs 611 are respectively arranged on the front side and the rear side of the top end of the brake plate 610 in the up-down direction, the top ends of the limiting springs 611 are fixedly connected with the inner wall of the shell 63, the limiting springs 611 are compression springs, the elastic coefficient is 16N/CM, the limiting springs 611 generate elastic deformation after being stretched or extruded, the initial state is recovered after external force is removed, and the limiting springs 611 can prevent the brake plate 610 from rotating along with the bolts 69.

Preferably, the rotating mechanism 7 further includes: a rotating mechanism casing 71, a rotating base 72, a worm wheel 73, a stepping motor 75 and a worm 74; the rotating mechanism shell 71 is arranged at the top end of the LED display screen 8; the rotating seat 72 is rotatably connected to the right center position of the bottom end of the inner cavity of the rotating mechanism shell 71 through a bearing in the vertical direction, an inner ring of the bearing is in interference fit with the outer wall of the rotating seat 72, an outer ring of the bearing is fixedly connected with the inner wall of the rotating mechanism shell 71, and the top end of the rotating seat 72 extends out of the upper surface of the rotating mechanism shell 71 and is fixedly connected with the bottom end of the LED display screen 8; the worm wheel 73 is connected below the outer wall of the rotating seat 72 in a key mode, the worm wheel 73 can drive the rotating seat 72 to rotate clockwise under the rotating force of the worm 74, and the rotating seat 72 drives the LED display screen 8 to rotate clockwise to a specified angle; the stepping motor 75 is arranged at the left end of the front side of the rotating mechanism shell 71 along the front-back direction, the output end of the rotating seat 72 extends into the inner cavity of the rotating mechanism shell 71, the stepping motor 75 is electrically connected with the control box 2, the specific usage model of the stepping motor 75 is directly purchased, installed and used from the market according to the actual usage requirement, and the stepping motor 75 is controlled by the control box 2 to drive the worm 74 to rotate clockwise; the worm 74 is screwed to the output end of the stepping motor 75 in the forward and backward directions, and the worm 74 meshes with the worm wheel 73.

All the electrical components in the present application can be connected with an external adaptive power supply through a wire, and an adaptive external controller should be selected to connect according to specific actual use conditions to meet the control requirements of all the electrical components, and the specific connection mode and the control sequence thereof should be referred to in the following working principle that the electrical components are electrically connected in sequence, the detailed connection means thereof is a known technology in the art and is not described, and the following main description of the working principle and the process specifically works as follows.

When the trailer is used, a worker pulls the trailer body 1 to a specified position by using a tractor, controls the control box 2 to start the LED display screen 8, enables the display screen inside the LED display screen 8 to display specified warning signs and patterns, when the height of the LED display screen 8 needs to be adjusted, the worker upwards screws out the bolt 69, enables the bolt 69 to drive the brake plate 610 to upwards move and extrude the limiting spring 611, enables the inner wall of the brake plate 610 to be separated from the outer wall of the hand wheel 64, further releases the fixation of the hand wheel 64, enables the hand wheel 64 to rotate the hand wheel 64 to drive the first bevel gear 65 to rotate anticlockwise or clockwise, enables the second bevel gear 66 to rotate clockwise or anticlockwise under the rotating force of the first bevel gear 65 due to the fact that the second bevel gear 66 is meshed with the first bevel gear 65, and enables the second bevel gear 66 to drive the screw rod 67 to rotate clockwise or anticlockwise in the inner cavity of the guide rail 62, because the screw nut plate 68 and the screw rod 67 are screwed, the screw nut plate 68 is driven to move upwards or downwards along the inner cavity of the guide rail 62 under the limiting action of the guide rail 62 and the rotating force of the screw rod 67, and the screw nut plate 68 drives the LED display screen 8 to move upwards or downwards under the cooperation of the rotating mechanism 7 and the worm 74, so as to change the position height of the LED display screen 8, when the direction angle of the LED display screen 8 needs to be changed, a worker controls the control box 2 to start the stepping motor 75, the stepping motor 75 drives the worm 74 to rotate clockwise, because the worm wheel 73 is meshed with the worm 74, the worm wheel 73 drives the rotating seat 72 to rotate clockwise under the rotating force of the worm 74, the rotating seat 72 drives the LED display screen 8 to rotate clockwise to a specified angle, when the LED display screen 8 is stored, the worker controls the control box 2 to drive the hydraulic cylinder 10 to shorten, because the upper and lower both ends of pneumatic cylinder 10 are connected with mount pad 9 and telescopic machanism 6 through the round pin axle rotation respectively, make pneumatic cylinder 10 self shorten the in-process with the mount pad 9 round pin axle rotation junction as the summit, self inclines to the front side and rotates, and under the cooperation of connecting seat 11 pull telescopic machanism 6 and use pivot 5 and fixing base 4 bearing rotation junction to incline to rotate to the inner chamber of containing box 12 to accomplish and accomodate as the summit to accomodate the protection when can be convenient for highway construction warning sign removal, and can adjust highway construction warning sign height and angle.

Highway construction warning sign is mostly comparatively simple of fixed structure, and the warning sign of being inconvenient for removes to can't adjust the height and the angle of warning sign, lead to the warning sign suitability relatively poor

In the description of the present invention, it is to be understood that the terms "top end", "bottom end", "one end", "front side", "rear side", "other end", "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated; also, unless expressly stated or limited otherwise, the terms "mounted," "screwed," "plugged," "interference fit," "disposed," and the like are to be construed broadly, e.g., as a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a road warning sign is used in highway construction which characterized in that includes:

a trailer body (1);

a control box (2) mounted on the right front of the trailer body (1);

the storage battery (3) is installed on the front side of the bottom end of the trailer main body (1) in the left-right direction, and the storage battery (3) is electrically connected with the control box (2);

the number of the fixing seats (4) is two, and the two fixing seats (4) are respectively arranged at the left end and the right end of the rear side of the top end of the trailer main body (1);

the rotating shaft (5) is rotatably connected to the inner sides of the left fixing seat (4) and the right fixing seat (4) through bearings in the left-right direction, an inner ring of each bearing is in interference fit with the outer wall of the rotating shaft (5), and an outer ring of each bearing is fixedly connected with the inner wall of each fixing seat (4);

the telescopic mechanism (6) is arranged at the center of the outer wall of the rotating shaft (5) along the vertical direction;

the rotating mechanism (7) is installed at the top end of the telescopic mechanism (6);

the LED display screen (8) is installed at the top end of the rotating mechanism (7), and the LED display screen (8) is electrically connected with the control box (2);

and a storage box (12) attached to the front side of the top end of the trailer body (1).

2. The road warning sign for road construction according to claim 1, characterized in that: the telescoping mechanism (6) comprises:

the number of the supporting seats (61) is two, and the two supporting seats (61) are in interference fit with the left side and the right side of the middle part of the outer wall of the rotating shaft (5) along the vertical direction;

the guide rails (62) are arranged at the top ends of the left and right supporting seats (61) along the vertical direction;

a housing (63) disposed at a bottom center position of the guide rail (62) in the front-rear direction;

the hand wheel (64) is rotatably connected to the center of the front side of the inner cavity of the shell (63) through a bearing in the front-back direction, and the front side of the hand wheel (64) extends out of the outer wall of the shell (63);

a first bevel gear (65) screwed to the rear side of the hand wheel (64);

the mounting seat (9) is mounted on the rear side of the inner cavity of the trailer main body (1) along the front-rear direction;

one end of the hydraulic cylinder (10) is rotatably connected to the inner side of the mounting seat (9) through a pin shaft, and the hydraulic cylinder (10) is electrically connected with the control box (2);

the connecting seat (11) is installed at the center of the rear side of the guide rail (62), and the inner side of the connecting seat (11) is rotatably connected with the other end of the hydraulic cylinder (10) through a pin shaft.

3. The road warning sign for road construction according to claim 2, wherein: the telescopic mechanism (6) further comprises:

the second bevel gear (66) is rotatably connected to the rear side of the bottom end of the inner cavity of the shell (63) through a rotating shaft, and the second bevel gear (66) is meshed with the first bevel gear (65);

the screw rod screw (67) is connected to the top end of the second bevel gear (66) in a vertical direction in a screw mode, and the top end of the screw rod screw (67) penetrates through the outer wall of the shell (63) and extends into the inner cavity of the guide rail (62);

the screw rod nut plate (68) is inserted into the inner cavity of the guide rail (62) in the vertical direction, the top end of the screw rod nut plate (68) extends out of the upper surface of the guide rail (62), and the bottom end of the inner cavity of the screw rod nut plate (68) is in threaded connection with the top end of the outer wall of the screw rod (67).

4. The road warning sign for road construction according to claim 2, wherein: the telescopic mechanism (6) further comprises:

the bolt (69) is screwed at the position, corresponding to the hand wheel (64), of the front side of the top end of the shell (63) along the vertical direction, and the bottom end of the bolt (69) extends into the inner cavity of the shell (63);

the brake plate (610) is rotatably connected to the bottom end of the bolt (69) through a bearing in the front-back direction, an inner ring of the bearing is in interference fit with the outer wall of the bolt (69), an outer ring of the bearing is fixedly connected with the inner wall of the brake plate (610), and the inner wall of the brake plate (610) is attached to the outer wall of the hand wheel (64);

the number of the limiting springs (611) is two, the two limiting springs (611) are respectively arranged on the front side and the rear side of the top end of the brake plate (610) in the up-down direction, and the top ends of the limiting springs (611) are fixedly connected with the inner wall of the shell (63).

5. The road warning sign for road construction according to claim 1, characterized in that: the rotating mechanism (7) includes:

the rotating mechanism shell (71) is arranged at the top end of the LED display screen (8);

the rotating seat (72) is rotatably connected to the right center position of the bottom end of the inner cavity of the rotating mechanism shell (71) through a bearing in the vertical direction, an inner ring of the bearing is in interference fit with the outer wall of the rotating seat (72), an outer ring of the bearing is fixedly connected with the inner wall of the rotating mechanism shell (71), and the top end of the rotating seat (72) extends out of the upper surface of the rotating mechanism shell (71) and is fixedly connected with the bottom end of the LED display screen (8);

a worm gear (73) which is keyed below the outer wall of the rotating seat (72);

the stepping motor (75) is arranged at the left end of the front side of the rotating mechanism shell (71) along the front-back direction, the output end of the rotating seat (72) extends into the inner cavity of the rotating mechanism shell (71), and the stepping motor (75) is electrically connected with the control box (2);

and the worm (74) is in screw connection with the output end of the stepping motor (75) along the front and back directions, and the worm (74) is meshed with the worm wheel (73).