An asphalt pavement milling device for a regenerative patching vehicle

Abstract

This invention discloses an asphalt pavement milling device for a recycling integrated repair vehicle, comprising a fixed frame, a U-shaped sliding frame connected to the fixed frame via a lifting mechanism, a movable platform slidably mounted inside the U-shaped sliding frame and driven horizontally by a sliding frame cylinder; an L-shaped vertical lifting frame fixedly mounted on the movable platform, with a mounting frame slidably mounted on its vertical surface via a vertical lifting rail and driven to lift by a vertical lifting cylinder; a horizontally swinging milling machine hinged to the bottom of the mounting frame, with a swing cylinder and a pin cylinder on the mounting frame; and a negative pressure suction pipeline on the vertical lifting frame, including a three-way valve, a main pipeline, and branch pipelines. The outlet of the three-way valve is connected to an external suction device via the main pipeline, and the two inlets are respectively connected to the milling machine cavity and the suction trolley via branch pipelines. This invention can flexibly switch the milling direction, realize three-stage linkage cutting, and integrate negative pressure suction and handheld trolley fixed-point cleaning functions, effectively improving the efficiency and quality of pothole milling operations.

Description

Technical Field

[0001] This invention relates to the field of road maintenance equipment technology, specifically to an asphalt pavement milling device for a recycling integrated repair vehicle, mainly used for milling and cleaning potholes in asphalt pavements. Background Technology

[0002] Over long-term use, asphalt pavements are prone to potholes, cracks, and other pavement defects due to repeated vehicle loads and erosion from the natural environment. For pothole defects, the conventional repair process requires milling and cleaning the damaged pavement to remove the damaged asphalt mixture, followed by filling and compacting with new material.

[0003] Currently, milling devices used in road repair operations are typically mounted directly on the front or bottom of repair vehicles. While existing milling devices can perform basic milling functions, they still have the following shortcomings:

[0004] First, existing milling devices have a single milling direction, mostly only capable of longitudinal milling along the vehicle's direction of travel or only capable of transverse milling, making it difficult to flexibly switch milling directions according to the actual shape and size of the pothole. For irregularly shaped potholes, milling operations in a single direction often require repeated cuts, resulting in low work efficiency and easily causing uneven pothole boundaries, affecting the quality of subsequent repairs.

[0005] Second, existing milling equipment lacks precision in controlling milling depth. Most equipment relies solely on a single lowering of the lifting mechanism to determine the milling depth, lacking the ability to continuously and stably adjust the milling depth during operation, making it difficult to meet the repair needs of pits and grooves of different depths.

[0006] Third, after milling, a large amount of waste asphalt mixture and dust will remain in the pit. Most existing devices do not have negative pressure suction function, requiring additional dust collection equipment or manual cleaning, which is cumbersome and easily causes dust pollution at the construction site. Even if some devices are equipped with suction function, their suction pipes can only be connected to the milling machine, and cannot thoroughly clean the corners and details of the pit. Summary of the Invention

[0007] (a) Technical issues

[0008] The purpose of this invention is to provide an asphalt pavement milling device for a recycling integrated repair vehicle, which aims to solve the technical problems of existing milling devices, such as single milling direction, insufficient control of milling depth, and lack of integrated negative pressure suction cleaning function.

[0009] (II) Technical Content

[0010] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: an asphalt pavement milling device for a recycling integrated repair vehicle, comprising a repair vehicle body, the milling device being installed at the front end of the repair vehicle body, including a fixed frame fixedly connected to the repair vehicle body, the fixed frame being connected to a horizontally arranged U-shaped sliding frame via a lifting mechanism, a moving platform being slidably disposed inside the U-shaped sliding frame, and a sliding frame cylinder for driving the moving platform to slide horizontally being disposed inside the U-shaped sliding frame; a vertical lifting frame is fixedly disposed on the moving platform, the vertical lifting frame having an L-shaped structure, having a horizontal plane and a vertical plane, a mounting frame being slidably disposed on the vertical plane via a vertical lifting slide rail, and a mounting frame being fixedly disposed on the vertical plane. A vertical lifting cylinder is provided for driving the mounting frame to rise and fall; a milling machine that swings horizontally along the hinge point is hinged to the bottom of the mounting frame; a swing cylinder for driving the milling machine to swing horizontally to adjust the milling machine's transverse or longitudinal milling is hinged to the mounting frame; a pin cylinder for fixing the transverse or longitudinal position of the milling machine is fixed to the upper end of the mounting frame; a negative pressure suction pipeline is fixed to the vertical lifting frame; the negative pressure suction pipeline includes a three-way valve, a main pipeline and branch pipelines, and a suction trolley; the outlet of the three-way valve is connected to an external suction device through the main pipeline; the two inlets of the three-way valve are respectively connected to the milling machine's inner cavity and the suction trolley through branch pipelines.

[0011] Furthermore, the lifting mechanism includes a parallel link assembly hinged between the fixed frame and the U-shaped sliding frame, and a lifting cylinder hinged between the fixed frame and the U-shaped sliding frame for driving the U-shaped sliding frame to lift.

[0012] Furthermore, one end of the swing cylinder is hinged to the side of the mounting frame, and the other end of the swing cylinder is hinged to the upper part of the milling machine housing. The extension and retraction direction of the swing cylinder is set horizontally. When the swing cylinder extends and retracts, the milling machine swings horizontally around the axis of the hinge shaft.

[0013] Furthermore, the mounting bracket is provided with a pin seat at its upper end, and the milling machine is provided with a positioning hole at its upper end that corresponds to the pin seat. The pin cylinder is fixedly mounted on the pin seat, and when the piston rod of the pin cylinder extends, it is inserted into the positioning hole to lock the horizontal swing position of the milling machine.

[0014] Furthermore, the upper end of the milling machine is provided with at least two positioning holes, which are arranged at intervals along the horizontal swing direction of the milling machine, respectively corresponding to the transverse milling orientation locking and the longitudinal milling orientation locking of the milling machine.

[0015] Furthermore, the three-way valve is a manual three-way directional valve, and the three-way valve is equipped with a handle. By moving the handle, the outlet of the three-way valve can be selectively connected to one of the two inlets.

[0016] Furthermore, the suction trolley includes a trolley body, a suction nozzle, and a connecting pipe. The suction nozzle is located at the bottom of the trolley body, and one end of the connecting pipe is connected to the suction nozzle and the other end is detachably connected to a branch pipe.

[0017] Furthermore, it also includes a controller, which is electrically or hydraulically connected to the sliding frame cylinder, the vertical lifting cylinder, the swing cylinder, and the pin cylinder, respectively, for controlling the action sequence and stroke of each cylinder.

[0018] (III) Technical Effects

[0019] The advantages of this invention compared to the prior art are:

[0020] 1. This invention utilizes a swing cylinder to drive the milling machine to swing horizontally along the hinge point, and a locking pin cylinder for azimuth locking, enabling the milling machine to quickly switch between transverse and longitudinal milling modes. In transverse milling, the sliding frame cylinder propels the milling machine laterally, suitable for milling the width of the pit; in longitudinal milling, the repair cart body slowly propels the milling machine, suitable for milling the length of the pit. The two modes can be flexibly combined according to the actual shape of the pit, improving the adaptability and efficiency of milling operations.

[0021] 2. This invention employs a three-stage linkage design consisting of a lifting mechanism, a vertical lifting cylinder, and a sliding frame cylinder. The lifting mechanism lowers the milling machine from its transport position to a tool-setting position close to the ground; the vertical lifting cylinder slowly and continuously presses down on the milling machine during milling operations, enabling fine-tuning control of the milling depth; and the sliding frame cylinder provides stable travel power during transverse milling. The three-stage mechanism has a clear division of labor and works in an orderly manner, improving the milling quality.

[0022] 3. This invention features a negative pressure suction pipeline fixedly installed on a vertical lifting frame. A three-way valve connects the milling machine's inner cavity and the handheld suction trolley to the suction equipment inside the repair vehicle's compartment. During milling operations, the three-way valve connects to the milling machine pipeline, allowing waste materials and dust generated during milling to be sucked into the recycling bin in real time. After the pit is milled, the three-way valve is switched to the suction trolley pipeline, allowing workers to use the handheld suction trolley to clean the pit's corners, bottom, and other details, ensuring no residual waste remains and providing a clean working surface for subsequent filling operations. This achieves efficient recycling of waste asphalt mixture. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the milling device of the present invention mounted on the repair vehicle body. Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of the milling device of the present invention mounted on the repair vehicle body. Figure 2.

[0025] Figure 3 This is a schematic diagram of the overall structure of the milling device of the present invention.

[0026] Figure 4 This is a schematic diagram of the main structure of the milling device of the present invention.

[0027] Figure 5 This is a rear view schematic diagram of the milling device of the present invention.

[0028] Figure 6 This is a top view of the milling device of the present invention.

[0029] Figure 7 This is a left-side view of the milling device of the present invention mounted on the repair vehicle body.

[0030] The components include: 1. Repair vehicle body; 2. Fixed frame; 3. U-shaped sliding frame; 4. Moving platform; 5. Sliding frame cylinder; 6. Vertical lifting frame; 7. Vertical lifting slide rail; 8. Mounting frame; 9. Vertical lifting cylinder; 10. Milling machine; 11. Swing cylinder; 12. Pin cylinder; 13. Three-way valve; 14. Main pipeline; 15. Branch pipeline; 16. Suction trolley; 17. Parallel connecting rod assembly; 18. Lifting cylinder. Detailed Implementation

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] Combined with appendix Figure 1 To be continued Figure 7This invention provides an asphalt pavement milling device for a recycling integrated repair vehicle, including a repair vehicle body 1. The milling device is installed at the front end of the repair vehicle body 1. The device mainly consists of a fixed frame 2, a lifting mechanism, a U-shaped sliding frame 3, a moving platform 4, a sliding frame cylinder 5, a vertical lifting frame 6, a vertical lifting slide rail 7, a mounting frame 8, a vertical lifting cylinder 9, a milling machine 10, a swing cylinder 11, a pin cylinder 12, a negative pressure suction pipe, and a suction trolley 16.

[0035] The fixed frame 2 is fixedly connected to the repair vehicle body 1, serving as the mounting base for the entire milling device. The fixed frame 2 is connected to a horizontally arranged U-shaped sliding frame 3 via a lifting mechanism. The lifting mechanism includes a parallel linkage assembly 17 hinged between the fixed frame 2 and the U-shaped sliding frame 3, and a lifting cylinder 18 hinged between the fixed frame 2 and the U-shaped sliding frame 3 for driving the U-shaped sliding frame 3 to lift. The parallel linkage assembly 17 consists of multiple sets of parallel linkages, one end of which is hinged to the fixed frame 2, and the other end is hinged to the U-shaped sliding frame 3, ensuring that the U-shaped sliding frame 3 remains stable during lifting. Maintaining a horizontal posture, one end of the lifting cylinder 18 is hinged to the fixed frame 2, and the other end is hinged to the U-shaped sliding frame 3. When the lifting cylinder 18 extends or retracts, it drives the U-shaped sliding frame 3 and its components to be lifted or lowered as a whole, realizing the switching between the transport state and the working state of the milling machine 10. In the transport state, the lifting cylinder lifts the U-shaped sliding frame 3 and the milling machine 10 to a certain distance off the ground to avoid interference with the ground during travel. In the working state, the lifting cylinder 18 lowers the U-shaped sliding frame 3 and the milling machine 10 to a tool-setting position close to the ground to prepare for milling operations.

[0036] The U-shaped sliding frame 3 houses a movable platform 4, and a sliding frame cylinder 5 is installed inside the U-shaped sliding frame 3 to drive the movable platform 4 to slide horizontally. The cylinder body of the sliding frame cylinder 5 is fixed to one inner wall of the U-shaped sliding frame 3, and the piston rod end is connected to the movable platform 4. When the sliding frame cylinder 5 extends or retracts, it pushes the movable platform 4 to slide horizontally back and forth along the guide direction of the U-shaped sliding frame 3, thereby driving the milling machine 10 installed below the movable platform 4 to achieve transverse horizontal feed movement, providing travel power for transverse milling operations.

[0037] A vertical lifting frame 6 is fixedly mounted on the mobile platform 4. The vertical lifting frame 6 has an L-shaped structure with a horizontal plane and a vertical plane. The horizontal plane is fixedly connected to the mobile platform 4. A mounting frame 8 is slidably mounted on the vertical plane via a vertical lifting slide rail 7. Specifically, the vertical lifting slide rail 7 is fixedly mounted on the vertical plane of the vertical lifting frame 6. The mounting frame 8 slides along the vertical lifting slide rail 7 via a slider, allowing the mounting frame 8 to slide up and down in the vertical direction. A vertical lifting cylinder 9 is fixedly mounted on the vertical plane to drive the mounting frame 8 to move up and down. The cylinder body of the vertical lifting cylinder 9 is fixed to the vertical plane of the vertical lifting frame 6, and the piston rod end is connected to the mounting frame 8. When the vertical lifting cylinder 9 extends or retracts, it drives the mounting frame 8 to move up and down along the vertical lifting slide rail 7, thereby driving the milling machine 10 to achieve lifting and lowering motion to adjust the milling depth. During the milling operation, the vertical lifting cylinder 9 slowly and continuously presses down on the milling machine 10 to achieve fine-tuning control of the milling depth and meet the repair needs of pits and grooves of different depths. The milling machine 10 is lowered to a tool-setting position close to the ground by a lifting mechanism, and then the vertical lifting cylinder 9 makes fine-tuning of the depth during operation, realizing two-stage lifting coordination.

[0038] The mounting frame 8 is hinged at the bottom to a milling machine 10 that swings horizontally along the hinge point. Specifically, the upper part of the casing of the milling machine 10 is hinged to the bottom of the mounting frame 8 via a vertically set hinge shaft, allowing the milling machine 10 to swing horizontally around the axis of the hinge shaft. The mounting frame 8 is hinged to a swing cylinder 11 for driving the milling machine 10 to swing horizontally to adjust the milling machine's transverse or longitudinal milling. One end of the swing cylinder 11 is hinged to the side of the mounting frame 8, and the other end of the swing cylinder 11 is hinged to the upper part of the casing of the milling machine 10. The extension and retraction direction of the swing cylinder 11 is set horizontally. When the swing cylinder 11 extends or retracts, the milling machine 10 swings horizontally around the axis of the hinge shaft, thereby realizing the switching of the milling machine 10 between the transverse and longitudinal milling positions.

[0039] In the transverse milling orientation, the milling width direction of the milling machine 10 is consistent with the width direction of the repair cart body 1. At this time, the sliding frame cylinder 5 pushes the moving platform 4, causing the milling machine 10 to move laterally along the U-shaped sliding frame 3. This is suitable for milling the width direction of the pit. In the longitudinal milling orientation, the milling width direction of the milling machine 10 is consistent with the travel direction of the repair cart body 1. At this time, the milling machine 10 is pushed forward by the slow movement of the repair cart body 1. This is suitable for milling the length direction of the pit. The two milling orientations can be flexibly combined according to the actual shape of the pit. For irregular pits, transverse milling can be performed first, followed by longitudinal milling, or they can be performed alternately, reducing the number of repeated cuts and improving the adaptability and efficiency of the milling operation.

[0040] The mounting bracket 8 is fixedly equipped with a pin cylinder 12 for fixing the milling machine 10 in the lateral or longitudinal direction. Specifically, the mounting bracket 8 has a pin seat at its upper end, and the milling machine 10 has a positioning hole at its upper end that corresponds to the pin seat. The pin cylinder 12 is fixedly mounted on the pin seat. When the milling machine 10 swings to the lateral or longitudinal milling position, the piston rod of the pin cylinder 12 extends and inserts into the corresponding positioning hole to lock the horizontal swing position of the milling machine 10 and prevent the milling machine 10 from deflecting due to the cutting reaction force during the milling operation. Furthermore, the upper end of the milling machine 10 has at least two positioning holes, which are located along the milling machine 10. The horizontal swing direction is arranged at intervals, corresponding to the transverse milling orientation lock and the longitudinal milling orientation lock of the milling machine, respectively. When it is necessary to switch the milling direction, first control the pin cylinder 12 to retract, so that the piston rod is pulled out from the current positioning hole and the lock is released; then control the swing cylinder 11 to extend and retract, driving the milling machine 10 to swing horizontally to another orientation; finally control the pin cylinder 12 to extend, so that the piston rod is inserted into the corresponding other positioning hole, completing the orientation switch and lock. The above switching process is simple to operate and reliable in positioning, enabling the milling machine 10 to quickly switch between two milling modes.

[0041] The vertical lifting frame 6 is fixedly equipped with a negative pressure suction pipeline, which includes a three-way valve 13, a main pipeline 14, and branch pipelines 15, as well as a suction trolley 16. The outlet of the three-way valve 13 is connected to an external suction device through the main pipeline 14. The external suction device is located in the compartment of the repair vehicle body 1, such as a negative pressure suction fan or a vacuum pump. The two inlets of the three-way valve 13 are respectively connected to the inner cavity of the milling machine 10 and the suction trolley 16 through the branch pipelines 15. The three-way valve 13 is a manual three-way reversing valve. The three-way valve 13 is equipped with a handle. By moving the handle, the outlet of the three-way valve 13 can be selectively connected to one of the two inlets.

[0042] When milling is performed, the handle of the three-way valve 13 is turned to connect the discharge port to the branch pipe 15 that connects to the inner cavity of the milling machine 10. The waste asphalt mixture and dust generated during milling are drawn into the recycling chamber of the external suction equipment under negative pressure through the inner cavity of the milling machine 10, the branch pipe 15, the three-way valve 13, and the main pipe 14. This achieves real-time material suction during the milling process, preventing waste materials and dust from scattering and polluting the construction environment. When the milling operation is completed and the corners and details of the pit need to be cleaned, the handle of the three-way valve 13 is turned to connect the discharge port to the branch pipe 15 that connects to the suction trolley 16. Workers can use the suction trolley 16 to clean the corners, bottom, and other details of the pit. The remaining waste material enters the recycling chamber through the suction trolley 16, the branch pipe 15, the three-way valve 13, and the main pipe 14, ensuring that there is no residual waste material in the pit and providing a clean working surface for subsequent filling operations. This achieves efficient recycling of waste asphalt mixture.

[0043] The suction trolley 16 includes a trolley body, a suction nozzle, and a connecting pipe. The suction nozzle is located at the bottom of the trolley body. One end of the connecting pipe is connected to the suction nozzle, and the other end is detachably connected to a branch pipe 15. In use, the worker holds the handle of the suction trolley 16, aligns the suction nozzle with the area to be cleaned, and sucks in residual waste material under negative pressure. When not in use, the connecting pipe can be disconnected from the branch pipe 15, and the suction trolley 16 can be stored on the repair trolley body 1. The detachable connection can use a quick-connect coupling for easy frequent disassembly and assembly.

[0044] The present invention also includes a controller, which is electrically or hydraulically connected to the sliding frame cylinder 5, the vertical lifting cylinder 9, the swing cylinder 11, and the pin cylinder 12, respectively, for controlling the action sequence and stroke of each cylinder. The controller can be a PLC programmable logic controller or a microcontroller, etc., and automatically controls the action of each cylinder through a preset control program. The controller can implement the following control logic:

[0045] During the milling direction switching process, the controller controls the operation of each hydraulic cylinder in the following sequence: First, it controls the retraction of the pin cylinder 12 to release the orientation lock of the milling machine 10; then, it controls the extension and retraction of the swing cylinder 11 to drive the milling machine 10 to swing horizontally to the target orientation; finally, it controls the extension of the pin cylinder 12 to insert into the corresponding positioning hole to complete the locking. The above sequence control ensures that the orientation switching process is safe and reliable and avoids interference between the hydraulic cylinders.

[0046] During the milling operation, the controller first controls the lifting cylinder 18 to lower the U-shaped sliding frame 3 to the tool setting position, and then controls the vertical lifting cylinder 9 to slowly press down the milling machine 10 to the set milling depth. At the same time, according to the milling orientation, the controller controls the sliding frame cylinder 5 to push the milling machine 10 to move laterally (during transverse milling) or controls the repair vehicle body 1 to move slowly forward (during longitudinal milling), so as to realize continuous milling operation. The controller can control the stroke and action time of each cylinder according to the preset milling depth parameters and travel speed parameters.

[0047] It should be noted that the milling machine 10 is a commercially available conventional road milling machine, which has a milling rotor and a drive motor inside. The machine casing forms an inner cavity, and the milling rotor is located in the inner cavity. The drive motor drives the milling rotor to rotate to mill the road surface. Since it is existing technology, it will not be described in detail in this embodiment.

[0048] The working process of this invention is as follows:

[0049] Step 1: The repair vehicle 1 drives to the pothole in the asphalt pavement to be repaired, aligns the milling device with the pothole, and the controller controls the lifting cylinder 18 to work, driving the U-shaped sliding frame 3 and its components to lower down, so that the milling machine 10 is close to the ground and the tool setting is completed.

[0050] Step 2: Determine the milling direction based on the shape and size of the pit. If it is necessary to switch the milling direction, the controller controls the pin cylinder 12 to retract and unlock, and then controls the swing cylinder 11 to drive the milling machine 10 to swing horizontally to the transverse milling position or the longitudinal milling position, and then controls the pin cylinder 12 to extend to the locked position.

[0051] Step 3: The controller controls the vertical lifting cylinder 9 to press the milling machine 10 down to the set milling depth, and simultaneously controls the sliding frame cylinder 5 to push the moving platform 4 to drive the milling machine 10 laterally (during lateral milling), or controls the repair cart body 1 to slowly advance to drive the milling machine 10 longitudinally (during longitudinal milling). During milling, the three-way valve 13 switches to the milling machine pipeline to suck up the waste material and dust generated during milling into the recovery chamber in real time. For irregular pits, after lateral milling is completed, the controller can switch to longitudinal milling for supplementary milling, or alternate between the two methods.

[0052] Step four: After milling is completed, switch the three-way valve 13 to the suction trolley 16 pipeline. The worker holds the suction trolley 16 to clean the corners, bottom and other details of the pit to ensure that there is no residual waste in the pit.

[0053] Step 5: After cleaning is completed, the controller controls the vertical lifting cylinder 9 to retract the milling machine 10, and controls the lifting cylinder 18 to lift the U-shaped sliding frame 3 to the transport position, thus completing the operation.

[0054] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An asphalt pavement milling device for a recycling integrated repair vehicle, comprising a repair vehicle body (1), wherein the milling device is installed at the front end of the repair vehicle body (1), characterized in that: Includes a fixed frame (2) fixedly connected to the repair vehicle body (1), the fixed frame (2) is connected to a horizontally arranged U-shaped sliding frame (3) via a lifting mechanism, a moving platform (4) is slidably provided inside the U-shaped sliding frame (3), and a sliding frame cylinder (5) is provided inside the U-shaped sliding frame (3) for driving the moving platform (4) to slide horizontally. The mobile platform (4) is fixedly provided with a vertical lifting frame (6). The vertical lifting frame (6) is an L-shaped structure with a horizontal plane and a vertical plane. The vertical plane is provided with a mounting frame (8) slidably via a vertical lifting slide rail (7). The vertical plane is fixedly provided with a vertical lifting cylinder (9) for driving the mounting frame (8) to lift. The mounting frame (8) is hinged at the bottom to a milling machine (10) that swings horizontally along the hinge point. The mounting frame (8) is hinged to a swing cylinder (11) for driving the milling machine (10) to swing horizontally to adjust the milling machine's transverse or longitudinal milling. The upper end of the mounting frame (8) is fixed to a pin cylinder (12) for fixing the transverse or longitudinal position of the milling machine (10). The vertical lifting frame (6) is fixedly equipped with a negative pressure suction pipeline. The negative pressure suction pipeline includes a three-way valve (13), a main pipeline (14) and a branch pipeline (15), and also includes a suction trolley (16). The outlet of the three-way valve (13) is connected to an external suction device through the main pipeline (14), and the two inlets of the three-way valve (13) are connected to the milling machine cavity and the suction trolley (16) through the branch pipeline (15) respectively.

2. The asphalt pavement milling device for a recycling integrated repair vehicle according to claim 1, characterized in that, The lifting mechanism includes a parallel link assembly (17) hinged between the fixed frame (2) and the U-shaped sliding frame (3), and a lifting cylinder (18) hinged between the fixed frame (2) and the U-shaped sliding frame (3) for driving the U-shaped sliding frame (3) to lift.

3. The asphalt pavement milling device for a recycling integrated repair vehicle according to claim 1, characterized in that, One end of the swing cylinder (11) is hinged to the side of the mounting frame (8), and the other end of the swing cylinder (11) is hinged to the upper part of the milling machine (10) housing. The extension and retraction direction of the swing cylinder (11) is set horizontally. When the swing cylinder (11) extends and retracts, the milling machine (10) swings horizontally around the axis of the hinge shaft.

4. The asphalt pavement milling device for a recycling integrated repair vehicle according to claim 1, characterized in that, The mounting bracket (8) is provided with a pin seat at the upper end, and the milling machine is provided with a positioning hole corresponding to the pin seat at the upper end. The pin cylinder (12) is fixedly mounted on the pin seat. When the piston rod of the pin cylinder (12) extends out, it is inserted into the positioning hole to lock the horizontal swing position of the milling machine (10).

5. The asphalt pavement milling device for a recycling integrated repair vehicle according to claim 4, characterized in that, The milling machine (10) is provided with at least two positioning holes at its upper end. The two positioning holes are arranged at intervals along the horizontal swing direction of the milling machine (10) and correspond to the horizontal milling orientation lock and the longitudinal milling orientation lock of the milling machine, respectively.

6. The asphalt pavement milling device for a recycling integrated repair vehicle according to claim 1, characterized in that, The three-way valve (13) is a manual three-way reversing valve. The three-way valve is equipped with a handle. By moving the handle, the outlet of the three-way valve can be selectively connected to one of the two inlets.

7. The asphalt pavement milling device for a recycling integrated repair vehicle according to claim 1, characterized in that, The suction trolley (16) includes a trolley body, a suction nozzle and a connecting pipe. The suction nozzle is located at the bottom of the trolley body. One end of the connecting pipe is connected to the suction nozzle and the other end is detachably connected to the branch pipe (15).

8. The asphalt pavement milling device for a recycling integrated repair vehicle according to any one of claims 1 to 7, characterized in that, It also includes a controller, which is electrically or hydraulically connected to the sliding frame cylinder (5), the vertical lifting cylinder (9), the swing cylinder (11) and the pin cylinder (12) respectively, and is used to control the action sequence and stroke of each cylinder.

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