A crack repairing device for highway construction

Abstract

The application discloses a crack repairing device for highway construction and belongs to the technical field of road construction, which comprises a truss module and a rolling module, the truss module is movably assembled on a construction vehicle and has a lifting state and a falling back state, the rolling module is further rotatably assembled on the truss module, the rolling module is arranged in linkage with the truss module, and a filling assembly for spraying filling material is arranged in the rolling module; when the truss module is in the lifting state, the filling assembly in the rolling module is in a closed state; and when the truss module is in the falling back state, the filling assembly in the rolling module is in a conducting state. The truss module capable of lifting and falling back is arranged in the device, and the rolling module capable of rolling along the ground is assembled on the truss module, so that the spraying position and the spraying amount of the filling material can be automatically adjusted according to the distribution position and the depth of the ground cracks in the continuous motion process, and the waste of the filling material is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction, and in particular relates to a crack repairing device for highway construction. Background Art

[0002] The highway crack repair device is a device that integrates automation technology and engineering practicality to meet the needs of highway crack repair and can significantly improve construction efficiency and quality.

[0003] Chinese patent publication number CN111663418A discloses a crack repair device for highway construction, including a mounting plate and a roller, which are symmetrically rotatably mounted on the mounting plate, a handrail symmetrically mounted on the mounting plate, a storage assembly and an extrusion assembly mounted on the mounting plate, and an adjustment assembly mounted on the storage assembly. The extrusion assembly is used to squeeze out the sealing agent in the storage assembly to repair highway cracks, and the adjustment assembly is used to control the outflow area of ​​the sealing agent to repair different cracks. The degree of opening of the adjustment assembly is controlled by rotating the clamping ring on the handrail. When the clamping ring is rotated, the adjustment assembly will be driven down.

[0004] During actual operation, the above-mentioned repair device cannot accurately extrude filling materials according to the distribution of cracks. At the same time, the amount of filling materials can only be adjusted according to the construction personnel's estimate. Not only is it easy to cause waste of filling materials, but if excessive filling is used, it will also cause the road surface to be uneven, affecting the driving of passing vehicles. Summary of the Invention

[0005] In view of the deficiencies in the prior art, an embodiment of the present invention aims to provide a crack repairing device for highway construction to solve the problems in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A crack repair device for highway construction includes a truss module and a rolling module. The truss module is movably assembled on a construction vehicle and has a raised state and a lowered state in the vertical direction. The truss module is also rotatably assembled with a rolling module. The rolling module is arranged in a linkage with the truss module. The rolling module is provided with a roller assembly and a filling assembly for spraying filling material. When the truss module is in the raised state, the roller assembly in the rolling module is in a blocked state. When the truss module is in the lowered state, the roller assembly in the rolling module is in a conducting state.

[0008] The truss module includes a vehicle frame assembly and an axle frame assembly. The axle frame assembly includes an axle frame that is slidably mounted on the vehicle frame assembly. A counterweight box is also movably provided on the axle frame. The counterweight box automatically adjusts its sliding direction according to the state of the truss module.

[0009] The roller assembly comprises a rectangular roller and a spray cavity. The rectangular roller is rotatably assembled on a shaft frame, and a plurality of independent spray cavities are arranged on the outer surface of the rectangular roller.

[0010] As a further solution of the present invention, the frame assembly includes a main frame, guide columns, a top plate and a roller wheel. Several guide columns are fixedly mounted on the main frame, the top plate is fixedly mounted on the top of the guide columns, and the roller wheel is rotatably mounted on the bottom of the main frame and rolls in contact with the ground.

[0011] As a further solution of the present invention, the axle frame assembly also includes a front axle frame, a sliding rod and a rear axle frame. The front axle frame is slidably inserted at one end of the axle frame, and the sliding rod is rotatably installed on the front axle frame. The rear end of the sliding rod is rotatably assembled with the rear axle frame, and the rear axle frame is fixedly assembled on the top plate. The counterweight box is slidably assembled on the sliding rod.

[0012] As a further solution of the present invention, the axle frame assembly also includes a traction arm, an axle pin head, an air chamber and a piston rod. One end of the traction arm is rotatably connected to the counterweight box, and the other end of the traction arm is fixedly connected to the axle pin head. The air chamber is fixedly set on the top plate, one end of the piston rod is inserted into the air chamber, and the other end of the piston rod is fixedly connected to the axle pin head.

[0013] As a further solution of the present invention, the roller assembly also includes a hollow shaft, an outer sleeve, a first guide tube, a second guide tube, a pneumatic telescopic warehouse and a pump flow shell. The hollow shaft is rotatably assembled on the shaft frame and fixedly connected to the rectangular roller. The outer sleeve is rotatably sleeved on the middle part of the hollow shaft. The first guide tube and the second guide tube are respectively fixedly assembled on the two ends of the shaft frame, and the first guide tube and the second guide tube pass through the hollow shaft and are connected to the outer sleeve. The end of the first guide tube is connected to the feed box, and the end of the second guide tube is connected to the air warehouse. Several pneumatic telescopic warehouses are circumferentially arranged on the outer sleeve and are connected to the inner cavity of the outer sleeve. One end of the pump flow shell is connected to the pneumatic telescopic warehouse, and the other end of the pump flow shell is slidably inserted on the inner wall of the rectangular roller.

[0014] As a further solution of the present invention, the rectangular roller surface is provided with a first surface and a second surface relative to each other, a plurality of the injection chamber arrays are arranged on the first surface, the second surfaces are arranged at intervals between the first surfaces, and a plurality of tooth nails are also provided on the second surface.

[0015] As a further solution of the present invention, the filling assembly includes a bottom sleeve, a top sleeve, an inner sleeve, a guide needle, an internal wall groove and an external wall groove. The bottom sleeve is fixedly arranged on the inner wall side of the first surface, the top sleeve is fixedly arranged at one end of the pump flow casing and is connected to the pump flow casing, the inner diameter end of the top sleeve is also provided with an inner sleeve, the guide needle is slidably inserted in the bottom sleeve and the inner sleeve, and a number of internal wall grooves are also provided on the guide needle, and the inner diameter end of the inner sleeve is also provided with an external wall groove.

[0016] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0017] The present invention provides a truss module that can be raised and lowered in the device, and the truss module is equipped with a rolling module that can roll along the ground. During continuous movement, the injection position and injection amount of the filling material can be automatically adjusted according to the distribution position and depth of the ground cracks, thereby avoiding waste of filling material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a crack repair device for highway construction provided in one embodiment of the present invention.

[0019] Figure 2 This is a schematic side structural diagram of a crack repair device for highway construction provided in one embodiment of the present invention.

[0020] Figure 3 for Figure 2 The middle figure is an enlarged schematic diagram of the mark A.

[0021] Figure 4 This is a schematic diagram of the rear side structure of a crack repair device for highway construction provided in one embodiment of the present invention.

[0022] Figure 5 for Figure 4 The middle figure shows an enlarged schematic diagram of the marker B.

[0023] Figure 6 This is a schematic structural diagram of a filling assembly in a crack repair device for highway construction provided in one embodiment of the present invention.

[0024] Figure 7 for Figure 6 The middle figure shows an enlarged schematic diagram of the area marked C.

[0025] Figure 8 Schematic diagram of the internal structure of the outer sleeve

[0026] Figure 1: Frame assembly, 101: Main frame, 102: Guide column, 103: Top plate, 104: Roller wheel, 2: Axle frame assembly, 201: Axle frame, 202: Front axle frame, 203: Slide rod, 204: Rear axle frame, 205: Counterweight box, 206: Traction arm, 207: Axle pin head, 208: Air chamber, 209: Piston rod, 3: Roller assembly, 301: Hollow axle rod, 302: Outer sleeve, 303: First guide pipe, 304: First Two guide pipes, 305-pneumatic telescopic chamber, 306-pump flow shell, 307-rectangular roller, 308-injection chamber, 309-tooth nail, 310-connecting pipe, 311-rotating valve core, 312-bottom port, 313-valve core ring, 314-piston cylinder, 315-pull ring, 4-filling assembly, 401-bottom sliding sleeve, 402-top sliding sleeve, 403-inner sliding sleeve, 404-guide needle, 405-internal wall groove, 406-external wall groove, 5-feeding box. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figures 1-8, a crack repair device for highway construction in an embodiment of the present invention has a relative first direction x, a second direction y and a third direction z, and the crack repair device for highway construction includes a truss module and a rolling module, the truss module is movably assembled on the construction vehicle and has a lifting state and a falling state in the vertical direction, and the truss module is also rotatably assembled with a rolling module, and the rolling module is arranged in linkage with the truss module, and the rolling module is provided with a roller assembly 3 and a filling assembly 4 for spraying filling material, when the truss module is in the lifting state, the roller assembly 3 in the rolling module is in a blocking state, and when the truss module is in the falling state, the roller assembly 3 in the rolling module is in a conducting state, and the roller assembly 3 is in contact with the ground at one end and can output filling material into the cracks in the ground; the truss module includes The frame assembly 1 and the axle frame assembly 2, the axle frame assembly 2 includes an axle frame 201, the axle frame 201 is slidably assembled on the frame assembly 1 along the third direction z, and a counterweight box 205 is also movably provided on the axle frame 201, and the counterweight box 205 automatically adjusts its sliding direction according to the state of the truss module; the roller assembly 3 includes a rectangular roller 307 and an injection chamber 308, the rectangular roller 307 is rotatably assembled on the axle frame 201, and a plurality of independent injection chambers 308 are provided on the outer surface of the rectangular roller 307; the frame assembly 1 includes a main frame 101, a guide column 102, a top plate 103 and a roller 104, a plurality of guide columns 102 are fixedly assembled on the main frame 101, the top plate 103 is fixedly assembled on the top of the guide column 102, and the roller 104 is rotatably assembled on the bottom of the main frame 101 and is in rolling contact with the ground.

[0029] In actual application of this embodiment, when the crack repair device is used to repair a highway, the truss module in the device is elastically slidably assembled on the frame assembly 1 along the third direction z. Since the rectangular roller 307 is a rectangular structure, when the rectangular roller 307 rotates in contact with the ground, the rotation axis of the rectangular roller 307 reciprocates and rises and falls in the third direction z, so that the truss module has a lifting state and a falling state in the third direction z. When the rolling module rolls on the ground, the truss module cyclically switches between the lifting state and the falling state. When the truss module switches from the falling state to the lifting state, the movably assembled counterweight box 205 slides toward the side away from the truss module and moves the center of gravity to the side of the roller wheel 104 at the bottom of the vehicle, so that the roller wheel 104 rolls under pressure to contact the repair part of the ground end, so that the filling material evenly covers the cracks and keeps the road surface straight. When the truss module switches from the lifting state to the falling state In the state, the counterweight box 205 slides toward the side close to the truss module to move the center of gravity to the side of the truss module and act on the rolling module. At this time, the rolling module is pressed against the ground so that the several injection chambers 308 are independently fitted with the ground. At this time, the filling material is pumped out into the several injection chambers 308 at the ground end through the feed box 5. The several injection chambers 308 are independently fitted on the ground side and cover the cracks in the ground. The injection chambers 308 that are not covered at the cracks remain in a blocked state, while the injection chambers 308 that cover the cracks are switched to a conductive state and output filling material into the cracks. Therefore, the filling material can be independently controlled to be injected into the corresponding injection chamber 308 according to the distribution position of the cracks in the ground. Not only can the injection area of ​​the filling material be adjusted according to the position of the cracks, but also the waste of material can be reduced. Compared with the error caused by manual filling, the uneven ground caused by excessive filling material can be reduced, without affecting the normal driving of passing vehicles.

[0030] See also Figure 2 and Figure 5 In a preferred embodiment of the present invention, the axle frame assembly 2 also includes a front axle frame 202, a slide rod 203 and a rear axle frame 204. The front axle frame 202 is slidably inserted into one end of the axle frame 201, and the slide rod 203 is rotatably installed on the front axle frame 202. The rear end of the slide rod 203 is rotatably assembled with the rear axle frame 204. The rear axle frame 204 is fixedly assembled on the top plate 103, and the counterweight box 205 is slidably assembled on the slide rod 203.

[0031] When this embodiment is actually applied, the front axle frame 202 is elastically slidably inserted on the axle frame 201, and one side of the front axle frame 202 is rotatably connected to the sliding rod 203, and the rear axle frame 204 rotatably connected at the end of the sliding rod 203 is fixedly assembled on one side of the top plate 103, so that when the truss module is in the raised state, the height of the front axle frame 202 in the third direction z is greater than the height of the rear axle frame 204 in the third direction z, so that the counterweight box 205 moves toward the side away from the truss module when sliding along the sliding rod 203, thereby moving the center of gravity of the device to one end of the rolling wheel 104. When the truss module is in the lowered state, the height of the front axle frame 202 in the third direction z is less than the height of the rear axle frame 204 in the third direction z, so that the counterweight box 205 moves toward the side close to the truss module when sliding along the sliding rod 203, thereby moving the center of gravity of the device to one end of the rolling module.

[0032] Furthermore, the shaft frame assembly 2 also includes a traction arm 206, an axle pin head 207, an air chamber 208 and a piston rod 209. One end of the traction arm 206 is rotatably connected to the counterweight box 205, and the other end of the traction arm 206 is fixedly connected to the axle pin head 207. The air chamber 208 is fixedly set on the top plate 103, one end of the piston rod 209 is inserted into the air chamber 208, and the other end of the piston rod 209 is fixedly connected to the axle pin head 207. When the counterweight box 205 follows the truss module to slide back and forth on the sliding rod 203, the traction arm 206 synchronously pulls the axle pin head 207 to reciprocate. Since the end of the axle pin head 207 is fixedly connected to the piston rod 209, the counterweight box 205 can synchronously drive the piston rod 209 to reciprocate during the movement, thereby making the inner cavity of the air chamber 208 cyclically switch between positive pressure and negative pressure states.

[0033] See also Figure 3 、 Figure 4 and Figure 8In a preferred embodiment of the present embodiment, the roller assembly 3 further includes a hollow shaft 301, an outer sleeve 302, a first flow guide tube 303, a second flow guide tube 304, a pneumatic telescopic chamber 305 and a pump flow casing 306. The hollow shaft 301 is rotatably assembled on the shaft frame 201 and fixedly connected to the rectangular roller 307. The outer sleeve 302 is rotatably sleeved on the middle part of the hollow shaft 301. The first flow guide tube 303 and the second flow guide tube 304 are respectively fixedly assembled at both ends of the shaft frame 201, and The first flow guide tube 303 and the second flow guide tube 304 pass through the hollow shaft 301 and are connected to the outer sleeve 302. The end of the first flow guide tube 303 is connected to the feed box 5, and the end of the second flow guide tube 304 is connected to the air chamber 208. Several pneumatic telescopic chambers 305 are circumferentially arranged on the outer sleeve 302 and are connected to the inner cavity of the outer sleeve 302. One end of the pump flow housing 306 is connected to the pneumatic telescopic chamber 305, and the other end of the pump flow housing 306 is slidably inserted on the inner wall of the rectangular roller 307.

[0034] In actual application of this embodiment, the hollow shaft 301 is fixedly rotatably assembled on the shaft frame 201, and the outer sleeve 302 is rotatably sleeved between the two groups of hollow shafts 301, and the first guide tube 303 and the second guide tube 304 at both ends of the outer sleeve 302 respectively pass through the through holes at the ends of the two groups of hollow shafts 301 and are fixedly arranged on one side of the shaft frame 201. The first guide tube 303 is used to continuously inject the filling material in the feed box 5 into the outer sleeve 302. A plurality of connecting tubes 310 are provided at the outer diameter end of the outer sleeve 302. The connecting tube 310 is slidably inserted in the pneumatic telescopic bin 305. The second guide tube 304 is fixedly arranged on the hollow shaft 301 and the outer sleeve 302, a rotary valve core 311 is fixedly provided at one end of the second guide tube 304, a bottom port 312 is provided at the bottom side of the rotary valve core 311, a valve core ring 313 is provided on the outer rotating sleeve of the rotary valve core 311, and a plurality of piston cylinders 314 are fixedly assembled on the outer wall side of the outer sleeve 302, a plurality of air holes are provided on the valve core ring 313, and the inner cavities of the plurality of piston cylinders 314 are connected with the plurality of air holes. When the piston cylinder 314 rotates to the side of the bottom port 312, the piston cylinder 314 on this side is connected with the bottom port 312, so that the second guide tube 304 can drive the piston inside the piston cylinder 314 to move by pumping gas, and the piston A pulling ring 315 is fixedly mounted on the piston inside the cylinder 314, and the pulling ring 315 is fixedly connected to the pneumatic telescopic chamber 305, thereby driving the pneumatic telescopic chamber 305 and the pump flow shell 306 to move. One end of the second guide tube 304 is connected to the inner cavity of the air chamber 208, and the movable inner cavity on one side of the pneumatic telescopic chamber 305 is connected to the pump flow shell 306. When the pump flow shell 306 and the pneumatic telescopic chamber 305 rotate to the side of the ground end, the second guide tube 304 and the pneumatic telescopic chamber 305 on this side are in a conducting state, thereby controlling the expansion and contraction of the pneumatic telescopic chamber 305 on this side, and at this time the outer sleeve 302 is connected to the pneumatic telescopic chamber 305 close to the ground end. So that the filling material passes through the outer sleeve 302 and the connecting pipe 310 and enters the inner cavity of the pump flow casing 306. When the truss module is in the falling state, the counterweight box 205 moves toward the side close to the truss module, so that the traction arm 206 pulls the piston rod 209 to move, and then the inner cavity of the air tank 208 is switched to a negative pressure state, so that when the second guide tube 304 is in the negative pressure state, the pump flow casing 306 is pulled to move through the piston cylinder 314, and the pump flow casing 306 moves toward the inner wall side away from the rectangular roller 307. Conversely, when the truss module switches to the lifting state, the pump flow casing 306 moves toward the inner wall side close to the rectangular roller 307.

[0035] In this embodiment, the filling material in the first guide tube 303 passes through the side shell of the outer sleeve 302 and fills the annular cavity between the inner wall of the outer sleeve 302 and the outer wall of the valve core ring 313, so that the filling material is pumped along the connecting tube 310 into the pneumatic telescopic chamber 305.

[0036] See also Figure 2 In a preferred embodiment of the present invention, the surface of the rectangular roller 307 is provided with a first surface a1 and a second surface a2 relative to each other, a plurality of the injection chambers 308 are arrayed on the first surface a1, the second surfaces a2 are arranged at intervals between the first surfaces a1, and a plurality of tooth nails 309 are also provided on the second surface a2.

[0037] In actual application of this embodiment, a plurality of independent injection chambers 308 are arranged in an array on the first surface a1, and a plurality of tooth pins 309 are arranged in a linear array on the second surface a2. The tooth pins 309 abut against the ground end so that when the construction vehicle pushes the rectangular roller 307 to move along the first direction x, the tooth pins 309 abut against the ground end due to friction and remain stationary. As a result, during the process of the rectangular roller 307 rotating around the axis, the axis of the rectangular roller 307 moves along the third direction z, thereby driving the shaft frame 201 as a whole to slide along the guide column 102, thereby changing the state of the truss module.

[0038] See also Figure 7 In a preferred embodiment of the present invention, the filling component 4 includes a bottom sleeve 401, a top sleeve 402, an inner sleeve 403, a guide needle 404, a built-in wall groove 405 and an external wall groove 406. The bottom sleeve 401 is fixedly arranged on the inner wall side of the first surface a1, the top sleeve 402 is fixedly arranged at one end of the pump flow housing 306 and is communicated with the pump flow housing 306, the inner diameter end of the top sleeve 402 is further provided with an inner sleeve 403, the guide needle 404 is slidably inserted in the bottom sleeve 401 and the inner sleeve 403, and a plurality of built-in wall grooves 405 are further provided on the guide needle 404, and the inner diameter end of the inner sleeve 403 is further provided with an external wall groove 406.

[0039] In actual application of this embodiment, the bottom sleeve 401 is fixedly arranged on the inner wall side of the rectangular roller 307, and the guide needle 404 is elastically slidably inserted between the bottom sleeve 401 and the inner sleeve 403, and several of the guide needles 404 are slidably inserted on one side of the injection chamber 308. When the first surface a1 is rotated and pressed to the ground end, the counterweight box 205 presses the rectangular roller 307 as a whole on the ground, so that independent cavities are formed between the several injection chambers 308 and the ground, and the guide needles 404 elastically inserted in the injection chamber 308 abut against the ground end. When the injection chamber 308 is located on the crack, the guide needle 404 forms a relative sliding between it and the bottom sleeve 401 according to the depth of the crack after being inserted into the crack, and the sliding distance is always less than the height of the inner cavity of the injection chamber 308. At this time, the pump flow shell 306 is pulled toward the ground end away from the ground by the pneumatic telescopic chamber 305. 405 , so that the pump housing 306 and the guide needle 404 are connected. At this time, the filling material in the pump housing 306 is sprayed into the side injection cavity 308 through the guide needle 404 and seeps into the crack under the action of pressure. At the same time, the size of the communication port can be affected according to the depth of the crack, thereby adjusting the injection amount of the filling material per unit time. When the injection cavity 308 is not at the crack position, the sliding distance of the side guide needle 404 in the process of contacting the ground is equal to the height of the inner cavity of the injection cavity 308. When the pump housing 306 pulls the top sleeve 402 to move along the third direction z, the internal wall groove 405 and the external wall groove 406 are always kept in a blocking state, thereby blocking the filling material from flowing into the side injection cavity 308, thereby eliminating unnecessary filling process.

[0040] The above-mentioned embodiment of the present invention provides a crack repair device for highway construction. By arranging a truss module that can be raised and lowered in the device, and assembling a rolling module that can roll along the ground on the truss module, the device can automatically adjust the injection position and injection amount of the filling material according to the distribution position and depth of the ground cracks during continuous movement, thereby avoiding waste of filling material.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A crack repair device for highway construction, characterized in that: The crack repair device for highway construction comprises: A truss module and a rolling module, wherein the truss module is movably assembled on the construction vehicle and has a lifting state and a falling state in the vertical direction. The truss module is also rotatably assembled with a rolling module, which is arranged in linkage with the truss module. The rolling module is provided with a roller assembly and a filling assembly for spraying filling material. When the truss module is in the lifting state, the roller assembly in the rolling module is in a blocking state. When the truss module is in the falling state, the roller assembly in the rolling module is in a conducting state. The truss module includes a vehicle frame assembly and an axle frame assembly. The axle frame assembly includes an axle frame that is slidably mounted on the vehicle frame assembly. A counterweight box is also movably provided on the axle frame. The counterweight box automatically adjusts its sliding direction according to the state of the truss module. The roller assembly includes a rectangular roller and an injection cavity. The rectangular roller is rotatably mounted on a shaft frame, and a plurality of independent injection cavities are provided on the outer surface of the rectangular roller. The filling assembly includes a bottom sliding sleeve, a top sliding sleeve, an inner sliding sleeve, a guide needle, an internal wall groove and an external wall groove. The bottom sliding sleeve is fixedly arranged on the inner wall side of the first surface, the top sliding sleeve is fixedly arranged on one end of the pump flow housing and is connected to the pump flow housing, the inner diameter end of the top sliding sleeve is also provided with an inner sliding sleeve, the guide needle is slidably inserted in the bottom sliding sleeve and the inner sliding sleeve, and the guide needle is also provided with a plurality of internal wall grooves, and the inner diameter end of the inner sliding sleeve is also provided with an external wall groove.

2. A crack repair device for highway construction according to claim 1, characterized in that: The frame assembly includes a main frame, guide columns, a top plate and a roller wheel. The main frame is fixedly equipped with a plurality of guide columns, the top plate is fixedly equipped on the top of the guide columns, and the roller wheel is rotatably equipped on the bottom of the main frame and rolls in contact with the ground.

3. A crack repair device for highway construction according to claim 1, characterized in that: The axle frame assembly also includes a front axle frame, a sliding rod and a rear axle frame. The front axle frame is slidably inserted at one end of the axle frame, and the sliding rod is rotatably installed on the front axle frame. The rear axle frame is rotatably installed at the end of the sliding rod. The rear axle frame is fixedly installed on the top plate, and the counterweight box is slidably installed on the sliding rod.

4. A crack repair device for highway construction according to claim 1, characterized in that: The axle frame assembly also includes a traction arm, an axle pin head, an air chamber and a piston rod. One end of the traction arm is rotatably connected to the counterweight box, and the other end of the traction arm is fixedly connected to the axle pin head. The air chamber is fixedly set on the top plate, one end of the piston rod is inserted into the air chamber, and the other end of the piston rod is fixedly connected to the axle pin head.

5. A crack repairing device for highway construction according to claim 1, characterized in that: The roller assembly also includes a hollow shaft, an outer sleeve, a first guide tube, a second guide tube, a pneumatic telescopic warehouse and a pump flow shell. The hollow shaft is rotatably assembled on the shaft frame and fixedly connected to the rectangular roller. The outer sleeve is rotatably sleeved on the middle part of the hollow shaft. The first guide tube and the second guide tube are respectively fixedly assembled on the two ends of the shaft frame, and the first guide tube and the second guide tube pass through the hollow shaft and are connected to the outer sleeve. The end of the first guide tube is connected to the feed box, and the end of the second guide tube is connected to the air warehouse. Several pneumatic telescopic warehouses are circumferentially arranged on the outer sleeve and are connected to the inner cavity of the outer sleeve. One end of the pump flow shell is connected to the pneumatic telescopic warehouse, and the other end of the pump flow shell is slidably inserted on the inner wall of the rectangular roller.

6. A crack repair device for highway construction according to claim 1, characterized in that: The rectangular roller surface is provided with a first surface and a second surface opposite to each other, a plurality of the injection cavity arrays are arranged on the first surface, the second surfaces are arranged at intervals between the first surfaces, and a plurality of tooth nails are also provided on the second surface.

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