Crack repairing device for highway construction

Abstract

The invention discloses a crack repairing device for highway construction, and relates to the technical field of highway construction, the crack repairing device comprises an infusion pump and a hose, and further comprises a holding pipe, a fixing cylinder, a liquid outlet pipe, a trowelling frame, a liquid outlet amount adjusting mechanism and a blowing mechanism, and the liquid outlet amount adjusting mechanism comprises a fixed cone ring, a movable cone block and a power assembly; the blowing mechanism comprises a rotating ring, a blowing cylinder, an air blower and a reciprocating rotating assembly. Airflow is blown out of a blowing cylinder to blow dust in a crack, a trowelling frame moves along the crack, an infusion pump pumps out asphalt liquid, the crack is repaired, the trowelling frame trowels the asphalt liquid, when the area of the crack is changed, a sliding cylinder moves, and under the action of air pressure, a gap between a movable cone block and a fixed cone ring is changed, so that the crack can be trowelled, and the crack can be repaired. When the asphalt liquid flows out, the outflow amount of the asphalt liquid is changed, meanwhile, the position of the rotating rod is synchronously changed, the rotating range of the purging cylinder is changed, and the outflow amount and the purging range of the asphalt liquid can be adjusted according to the area of the crack.

Description

Technical Field

[0001] The present invention relates to the technical field of highway construction, and specifically to a crack repair device for highway construction. Background Art

[0002] Highways mainly consist of a subgrade layer, a concrete layer, and an asphalt layer. Due to the action of traffic loads and the change of environmental temperature, cracks will gradually appear in the asphalt layer over time. Currently, the common method for repairing pavement cracks is to pour hot asphalt along the cracks. After sealing the cracks, it can prevent water from entering the road surface along the cracks. The hot asphalt for caulking is loaded in a corresponding pouring vehicle, and the pouring vehicle is pushed to move along the cracks, thereby realizing the pouring of hot asphalt along the cracks.

[0003] In the prior art, the area and orientation of cracks are uncertain, and the outflow volume of asphalt liquid cannot be controlled according to the area of the cracks, which is likely to cause waste or insufficiency of asphalt liquid. Therefore, there is an urgent need for a crack repair device for highway construction to solve the above problems. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a crack repair device for highway construction to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A crack repair device for highway construction includes a liquid extraction pump. The input end of the liquid extraction pump is internally connected to the inside of a liquid storage tank, and the output end of the liquid extraction pump is internally connected to one end of a hose. It further includes: A holding tube, one end of which is internally connected to the other end of the hose; A fixed cylinder, rotatably connected to the other end of the holding tube and internally connected thereto; An outlet pipe, internally connected to the inside of the fixed cylinder; A smoothing frame, connected to the outlet pipe, and the bottom of the smoothing frame is flush with the bottom of the outlet pipe; An outflow volume adjustment mechanism for controlling and adjusting the outflow volume of asphalt liquid according to the crack area. The outflow volume adjustment mechanism includes: a fixed conical ring, located inside the outlet pipe and connected thereto, the bottom of the fixed conical ring being a bevel structure; a moving conical block, located inside the outlet pipe, the top of the moving conical block being a bevel structure; a power assembly, one end connected to the moving conical block and the other end connected to the smoothing frame, for driving the moving conical block to move longitudinally according to the crack area; A purging mechanism, one end connected to the power assembly and the other end connected to the smoothing frame, for purging dust in the cracks.

[0006] As a further solution of the present invention: The power assembly includes: An arc-shaped frame, located inside the smoothing frame and connected thereto; The sliding cylinder is slidably connected to the arc-shaped frame. The sliding cylinder penetrates through the bottom of the leveling frame and is slidably connected thereto. A plurality of groups of the sliding cylinders are provided; The ball is rotatably connected to the bottom of the sliding cylinder; The first elastic member is sleeved on the sliding cylinder, with its bottom end connected to the bottom of the sliding cylinder and its top end connected to the arc-shaped frame; The communication component is connected to the arc-shaped frame at one end and to the moving conical block at the other end for driving the movement of the moving conical block.

[0007] As a further aspect of the present invention: The communication component includes: The arc-shaped pipe is internally communicated with the arc-shaped frame at one end; The folding pipe is internally communicated with the arc-shaped pipe; The sliding plug rod has its top end connected to the bottom of the moving conical block and is slidably connected to the folding pipe; The piston block is located inside the folding pipe and is slidably and snap-connected thereto; The second elastic member is connected to the piston block at one end and to the folding pipe at the other end.

[0008] As a further aspect of the present invention: The purging mechanism includes: The rotating ring is rotatably connected to the leveling frame; The purging cylinder is connected to the rotating ring and is internally communicated with the leveling frame. The purging cylinder is located on one side close to the arc-shaped frame, and a plurality of groups of purging holes are provided at the bottom of the purging cylinder; The hair dryer is connected to the leveling frame and is internally communicated therewith; The reciprocating rotation component is connected to the rotating ring at one end and to the piston block at the other end for driving the reciprocating rotation of the rotating ring.

[0009] As a further aspect of the present invention: The reciprocating rotation component includes: The first tooth arc is connected to the inner wall of the rotating ring; The gear is meshed with the first tooth arc and is rotatably connected to the leveling frame; The second tooth arc is meshed with the gear and is rotatably connected to the leveling frame; The strip frame is connected to the second tooth arc at one end; The telescopic member is rotatably connected to the strip frame at one end and to the leveling frame at the other end; The sliding block is located inside the strip frame and is slidably connected thereto; The rotating rod is rotatably connected to the sliding block and its bottom end is slidably connected to the leveling frame; The position adjustment component is connected to the piston block at one end and to the top end of the rotating rod at the other end for adjusting the position of the rotating rod.

[0010] As a further aspect of the present invention: The position adjustment component includes: The third elastic member, one end of which is connected to the strip frame and the other end is connected to the sliding block; The folding rod penetrates through the folding pipe and is slidably connected thereto, and one end of the folding rod is connected to the piston block; The bevel plate is connected to the top end of the rotating rod, and one side of the bevel plate is a bevel structure; The connecting frame is connected to the other end of the folding rod at the top, and the height of the connecting frame is higher than the height of the bevel plate; The roller is rotatably connected to the bottom end of the connecting frame and abuts against the bevel side of the bevel plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, the air flow blows out from the purging cylinder to purge the dust in the crack. The smoothing frame moves along the crack. The liquid pumping pump pumps out the asphalt liquid in the liquid storage tank. The asphalt liquid flows out from the liquid outlet pipe to repair the crack. The smoothing frame levels the asphalt liquid. When the area of the crack changes, the sliding cylinder moves. Under the action of air pressure, the gap between the moving conical block and the fixed conical ring changes, and the outflow of the asphalt liquid changes. At the same time, the position of the rotating rod changes synchronously, and the rotation range of the purging cylinder changes. The outflow of the asphalt liquid and the purging range can be adjusted according to the size of the crack area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of a crack repair device for highway construction in an embodiment of the present invention.

[0013] Figure 2 It is a structural sectional view of a crack repair device for highway construction in an embodiment of the present invention.

[0014] Figure 3 is Figure 2 The enlarged structural view at A in

[0015] Figure 4 It is a partial structural split view of a crack repair device for highway construction in an embodiment of the present invention.

[0016] Figure 5 It is a sectional view of the smoothing frame in an embodiment of the present invention.

[0017] Figure 6 It is a structural sectional view of the liquid outflow amount adjusting mechanism and the purging mechanism in an embodiment of the present invention.

[0018] Figure 7 It is a partial structural sectional view of the reciprocating rotation assembly in an embodiment of the present invention.

[0019] Figure 8 is Figure 7 The enlarged structural view at B in

[0020] In the figure: 1. Liquid extraction pump; 2. Hose; 3. Holding tube; 4. Fixed cylinder; 5. Liquid outlet pipe; 6. Smoothing frame; 7. Liquid output adjustment mechanism; 71. Fixed conical ring; 72. Moving conical block; 73. Power assembly; 731. Arc frame; 732. Sliding cylinder; 733. Ball; 734. First elastic member; 735. Connecting assembly; 7351. Arc tube; 7352. Folding tube; 7353. Sliding plug rod; 7354. Piston block; 7355. Second elastic member; 8. Purge mechanism; 81. Rotating ring; 82. Purge cylinder; 83. Hair dryer; 84. Reciprocating rotation assembly; 841. First tooth arc; 842. Gear; 843. Second tooth arc; 844. Strip frame; 845. Telescopic member; 846. Sliding block; 847. Rotating rod; 848. Position adjustment assembly; 8481. Third elastic member; 8482. Folding rod; 8483. Connecting frame; 8484. Roller; 8485. Hypotenuse plate. Detailed implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the embodiments of the present invention, please refer to Figures 1 to 8 a crack repair device for highway construction, including a liquid extraction pump 1, the input end of the liquid extraction pump 1 is internally connected to the inside of a liquid storage tank, the output end of the liquid extraction pump 1 is internally connected to one end of a hose 2, and further includes: A holding tube 3, one end of which is internally connected to the other end of the hose 2; A fixed cylinder 4, which is rotatably connected to the other end of the holding tube 3 and is internally connected to it; A liquid outlet pipe 5, which is internally connected to the inside of the fixed cylinder 4; A smoothing frame 6, which is connected to the liquid outlet pipe 5, and the bottom of the smoothing frame 6 is flush with the bottom of the liquid outlet pipe 5; A liquid output adjustment mechanism 7, which is used to control and adjust the liquid output of the asphalt liquid according to the crack area. The liquid output adjustment mechanism 7 includes: a fixed conical ring 71, which is located inside the liquid outlet pipe 5 and is connected to it, and the bottom of the fixed conical ring 71 is a bevel structure; a moving conical block 72, which is located inside the liquid outlet pipe 5, and the top of the moving conical block 72 is a bevel structure; a power assembly 73, one end of which is connected to the moving conical block 72 and the other end is connected to the smoothing frame 6, and is used to drive the moving conical block 72 to move longitudinally according to the crack area; A purge mechanism 8, one end of which is connected to the power assembly 73 and the other end is connected to the smoothing frame 6, and is used to adjust the purge range according to the size of the crack area and purge the dust in the crack.

[0023] The liquid storage tank (not shown in the figure) stores asphalt liquid. When the leveling frame 6 is far from the ground, the gap between the moving cone block 72 and the fixed cone ring 71 is the largest, and the purging mechanism 8 has the largest purging range. When repairing a crack, the operator holds the holding pipe 3 and makes the leveling frame 6 abut against the ground. The power assembly 73 drives the moving cone block 72 to move upward. At this time, the gap between the moving cone block 72 and the fixed cone ring 71 is the smallest, and the liquid extraction pump 1 pumps out the asphalt inside the liquid storage tank. The outflow of the asphalt liquid is less, and the purging range of the purging mechanism 8 is the smallest. The leveling frame 6 moves forward along the crack. When the area of the crack increases, the power assembly 73 drives the moving cone block 72 to move downward, so that the gap between the moving cone block 72 and the fixed cone ring 71 increases, the outflow of the asphalt liquid increases, the crack is repaired, the leveling frame 6 levels the asphalt liquid, and the purging range of the purging mechanism 8 increases, so that cracks of different areas can be purged.

[0024] In this embodiment, an anti-slip soft pad for the operator to hold is provided on the holding pipe 3.

[0025] As an embodiment of the present invention, please refer to Figures 2 to 4 , Figures 6 to 8 , the power assembly 73 includes: An arc frame 731, which is located inside the leveling frame 6 and is connected thereto; A sliding cylinder 732, which is slidably connected to the arc frame 731. The sliding cylinder 732 penetrates through the bottom of the leveling frame 6 and is slidably connected thereto. A plurality of groups of the sliding cylinders 732 are provided; A ball 733, which is rotatably connected to the bottom of the sliding cylinder 732; A first elastic member 734, which is sleeved on the sliding cylinder 732, and the bottom end thereof is connected to the bottom of the sliding cylinder 732, and the top end thereof is connected to the arc frame 731; A communication assembly 735, one end of which is connected to the arc frame 731 and the other end of which is connected to the moving cone block 72 for driving the moving cone block 72 to move.

[0026] When the leveling frame 6 abuts against the ground, the ball 733 and the sliding cylinder 732 are both retracted into the leveling frame 6, and the top of the sliding cylinder 732 extends into the arc frame 731. At this time, the gap between the moving cone block 72 and the fixed cone ring 71 reaches the minimum, and the outflow of the asphalt liquid is less. The leveling frame 6 moves forward along the crack. When the area of the crack increases, part of the sliding cylinder 732 and the ball 733 move downward under the reaction force of the first elastic member 734 and are inserted into the crack, so that the space inside the arc frame 731 increases. Under the linkage of the communication assembly 735, the moving cone block 72 moves downward, and the gap between the moving cone block 72 and the fixed cone ring 71 increases, and the outflow of the asphalt liquid increases. The first elastic member 734 can be a spring, a spring sheet, etc.

[0027] As an embodiment of the present invention, please refer to Figures 2 to 4 , Figures 6 to 8 , the communication assembly 735 includes: The arc tube 7351 is internally connected to the inside of the arc frame 731 at one end; The bent tube 7352 is internally connected to the arc tube 7351; The sliding plug rod 7353 has its top end connected to the bottom of the moving cone block 72 and is slidably connected to the bent tube 7352; The piston block 7354 is located inside the bent tube 7352 and is slidably clamped thereto; The second elastic member 7355 has one end connected to the piston block 7354 and the other end connected to the bent tube 7352.

[0028] When the crack area increases, part of the sliding cylinder 732 and the ball 733 move downward under the reaction force of the first elastic member 734 and insert into the crack, increasing the space inside the arc frame 731. Under the reaction force of the second elastic member 7355, the piston block 7354 moves upward. Driven by the air pressure, the sliding plug rod 7353 moves downward, driving the moving cone block 72 to move downward, increasing the gap between the moving cone block 72 and the fixed cone ring 71, and increasing the outflow rate of the asphalt liquid. The second elastic member 7355 can be a spring, a spring sheet, etc.

[0029] As an embodiment of the present invention, please refer to Figures 1 to 8 , the purging mechanism 8 includes: The rotating ring 81 is rotatably connected to the leveling frame 6; The purging cylinder 82 is connected to the rotating ring 81 and is internally connected to the leveling frame 6. The purging cylinder 82 is located on the side close to the arc frame 731, and a plurality of groups of purging holes are provided at the bottom of the purging cylinder 82; The hair dryer 83 is connected to the leveling frame 6 and is internally connected thereto; The reciprocating rotation assembly 84 has one end connected to the rotating ring 81 and the other end connected to the piston block 7354, and is used to drive the rotating ring 81 to reciprocate.

[0030] The reciprocating rotation assembly 84 drives the rotating ring 81 to reciprocate, and can adjust the rotation range of the rotating ring 81 according to the size of the crack area. The rotating ring 81 drives the purging cylinder 82 to reciprocate. The hair dryer 83 blows out air flow, so that the air flow blows out through the purging holes on the purging cylinder 82 to purge the dust in the crack.

[0031] As an embodiment of the present invention, please refer to Figures 1 to 4 , Figures 6 to 8 , the reciprocating rotation assembly 84 includes: The first tooth arc 841 is connected to the inner wall of the rotating ring 81; The gear 842 meshes with the first tooth arc 841 and is rotatably connected to the leveling frame 6; The second tooth arc 843 meshes with the gear 842 and is rotatably connected to the leveling frame 6; The strip frame 844 is connected to the second tooth arc 843 at one end; The telescopic member 845 is rotatably connected to the strip frame 844 at one end and rotatably connected to the smoothing frame 6 at the other end; The sliding block 846 is located inside the strip frame 844 and is slidably connected thereto; The rotating rod 847 is rotatably connected to the sliding block 846, and the bottom end thereof is slidably connected to the smoothing frame 6; The position adjusting assembly 848 is connected to the piston block 7354 at one end and connected to the top end of the rotating rod 847 at the other end for adjusting the position of the rotating rod 847.

[0032] The telescopic member 845 drives the strip frame 844 to rotate reciprocally around the rotating rod 847. The strip frame 844 drives the second tooth arc 843 to rotate. The second tooth arc 843 drives the gear 842 to rotate reciprocally. The gear 842 drives the first tooth arc 841 to rotate reciprocally. The first tooth arc 841 drives the rotating ring 81 to rotate reciprocally. And the position adjusting assembly 848 can adjust the position of the rotating rod 847 according to the size of the crack area, so that the rotation fulcrum of the strip frame 844 changes, thereby adjusting the rotation range of the rotating ring 81 according to the size of the crack area. The telescopic member 845 can be an electric telescopic rod, a cylinder, etc.

[0033] In this embodiment, the extension length of the telescopic member 845 is fixed.

[0034] As an embodiment of the present invention, please refer to Figures 2 to 4 、 Figures 6 to 8 The position adjusting assembly 848 includes: The third elastic member 8481 is connected to the strip frame 844 at one end and connected to the sliding block 846 at the other end; The folding rod 8482 passes through the folding tube 7352 and is slidably connected thereto. One end of the folding rod 8482 is connected to the piston block 7354; The bevel plate 8485 is connected to the top end of the rotating rod 847. One side of the bevel plate 8485 is a bevel structure; The connecting frame 8483 is connected to the other end of the folding rod 8482 at the top end. The height of the connecting frame 8483 is higher than the height of the bevel plate 8485; The roller 8484 is rotatably connected to the bottom end of the connecting frame 8483 and abuts against the bevel side of the bevel plate 8485.

[0035] The piston block 7354 moves longitudinally within the folding pipe 7352 according to the size of the crack area, driving the folding rod 8482 to move longitudinally. The folding rod 8482 drives the connecting frame 8483 and the roller 8484 to move longitudinally. In cooperation with the third elastic member 8481, the hypotenuse plate 8485 moves transversely, driving the rotating rod 847 to move transversely. Thus, the rotation point of the strip frame 844 is adjusted according to the size of the crack area. When the movement length of the telescopic member 845 remains unchanged, the rotation angle of the strip frame 844 is adjusted by changing the position of the rotating rod 847, thereby adjusting the rotation angle of the rotating ring 81. The third elastic member 8481 can be a spring, a spring sheet, etc.

[0036] The working principle of the present invention is as follows: There is asphalt liquid stored in a liquid storage tank (not shown in the figure). When the leveling frame 6 is far from the ground, the gap between the moving cone block 72 and the fixed cone ring 71 is the largest. When repairing a crack, the worker holds the holding pipe 3 and makes the leveling frame 6 abut against the ground. The ball 733 and the sliding cylinder 732 both retract into the leveling frame 6, and the top of the sliding cylinder 732 extends into the arc frame 731. At this time, the gap between the moving cone block 72 and the fixed cone ring 71 reaches the minimum, and the outflow of the asphalt liquid is less. The leveling frame 6 moves forward along the crack. When the crack area increases, part of the sliding cylinder 732 and the ball 733 move downward under the reaction force of the first elastic member 734 and insert into the crack, increasing the space inside the arc frame 731. Under the reaction force of the second elastic member 7355, the piston block 7354 moves upward. Driven by air pressure, the sliding plug rod 7353 moves downward, driving the moving cone block 72 to move downward, increasing the gap between the moving cone block 72 and the fixed cone ring 71, and increasing the outflow of the asphalt liquid. The hair dryer 83 blows out air flow, so that the air flow blows out through the blowing holes on the blowing cylinder 82 to blow the dust in the crack. The telescopic member 845 drives the strip frame 844 to reciprocally rotate around the rotating rod 847. The strip frame 844 drives the second tooth arc 843 to rotate. The second tooth arc 843 drives the gear 842 to reciprocally rotate. The gear 842 drives the first tooth arc 841 to reciprocally rotate. The first tooth arc 841 drives the rotating ring 81 to reciprocally rotate. The piston block 7354 moves longitudinally within the folding pipe 7352 according to the size of the crack area, driving the folding rod 8482 to move longitudinally. The folding rod 8482 drives the connecting frame 8483 and the roller 8484 to move longitudinally. In cooperation with the third elastic member 8481, the hypotenuse plate 8485 moves transversely, driving the rotating rod 847 to move transversely. Thus, the rotation point of the strip frame 844 is adjusted according to the size of the crack area. When the movement length of the telescopic member 845 remains unchanged, the rotation angle of the strip frame 844 is adjusted by changing the position of the rotating rod 847, thereby adjusting the rotation angle of the rotating ring 81.

[0037] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0038] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A crack repair device for highway construction, including a liquid extraction pump, the input end of the liquid extraction pump is internally connected to the inside of a liquid storage tank, and the output end of the liquid extraction pump is internally connected to one end of a hose. It is characterized in that, It further includes: A holding tube, with one end internally connected to the other end of the hose; A fixing cylinder, rotatably connected to the other end of the holding tube and internally connected to it; A liquid outlet tube, internally connected to the fixing cylinder; A smoothing frame, connected to the liquid outlet tube, and the bottom of the smoothing frame is flush with the bottom of the liquid outlet tube; A liquid output amount adjusting mechanism for controlling and adjusting the liquid output amount of the asphalt liquid according to the crack area. The liquid output amount adjusting mechanism includes: a fixed conical ring, located inside the liquid outlet tube and connected to it, and the bottom of the fixed conical ring is a bevel structure; A moving conical block, located inside the liquid outlet tube, and the top of the moving conical block is a bevel structure; a power assembly, with one end connected to the moving conical block and the other end connected to the smoothing frame, for driving the moving conical block to move longitudinally according to the crack area; A purging mechanism, with one end connected to the power assembly and the other end connected to the smoothing frame, for purging the dust in the crack.

2. The crack repair device for highway construction according to claim 1, wherein, The power assembly includes: An arc frame, located inside the smoothing frame and connected to it; A sliding cylinder, slidably connected to the arc frame, the sliding cylinder penetrates through the bottom of the smoothing frame and is slidably connected to it, and several groups of sliding cylinders are provided; A ball, rotatably connected to the bottom of the sliding cylinder; A first elastic member, sleeved on the sliding cylinder, with the bottom end connected to the bottom of the sliding cylinder and the top end connected to the arc frame; A communication assembly, with one end connected to the arc frame and the other end connected to the moving conical block, for driving the moving conical block to move.

3. The crack repair device for highway construction according to claim 2, characterized in that, The communication assembly includes: An arc tube, with one end internally connected to the arc frame; A folding tube, internally connected to the arc tube; A sliding plug rod, with the top end connected to the bottom of the moving conical block and slidably connected to the folding tube; A piston block, located inside the folding tube and slidably clamped to it; A second elastic member, with one end connected to the piston block and the other end connected to the folding tube.

4. A crack repair device for highway construction according to claim 3, characterized in that, The purging mechanism includes: A rotating ring, rotatably connected to the smoothing frame; A purging cylinder, connected to the rotating ring and internally connected to the smoothing frame, the purging cylinder is located on the side close to the arc frame, and several groups of purging holes are opened at the bottom of the purging cylinder; A hair dryer, connected to the smoothing frame and internally connected to it; A reciprocating rotation assembly, with one end connected to the rotating ring and the other end connected to the piston block, for driving the rotating ring to rotate reciprocally.

5. A crack repair device for highway construction according to claim 4, characterized in that, The reciprocating rotation assembly includes: A first tooth arc, connected to the inner wall of the rotating ring; A gear, meshing with the first tooth arc and rotatably connected to the smoothing frame; A second tooth arc, meshing with the gear and rotatably connected to the smoothing frame; A strip frame, with one end connected to the second tooth arc; A telescopic member, with one end rotatably connected to the strip frame and the other end rotatably connected to the smoothing frame; A sliding block, located inside the strip frame and slidably connected to it; A rotating rod, rotatably connected to the sliding block and the bottom end slidably connected to the smoothing frame; A position adjusting assembly, with one end connected to the piston block and the other end connected to the top end of the rotating rod, for adjusting the position of the rotating rod.

6. The crack repair device for highway construction according to claim 5, characterized in that, The position adjusting assembly includes: A third elastic member, with one end connected to the strip frame and the other end connected to the sliding block; A folding rod, penetrating through the folding tube and slidably connected to it, with one end of the folding rod connected to the piston block; An inclined plate, connected to the top end of the rotating rod, and one side of the inclined plate is a bevel structure; A connecting frame, with the top end connected to the other end of the folding rod, and the height of the connecting frame is higher than the height of the inclined plate; A roller, rotatably connected to the bottom end of the connecting frame and abutted against the beveled side of the inclined plate.

7. A crack repair device for highway construction according to claim 1, characterized in that, The holding tube is provided with an anti-slip soft pad for the staff to hold.

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