Cement stabilized macadam milling device

Abstract

This utility model relates to the technical field of cement-stabilized crushed stone leveling, and particularly to a cement-stabilized crushed stone milling device; it can achieve full contact between the cutting tool and the crushed stone aggregate, improve the uniformity of friction at all parts of the cutting tool, and effectively improve the service life of the cutting tool; it includes a walking device, a mounting housing hinged to the walking device, an adjuster that provides power for the rotation of the mounting housing, a milling drum rotatably mounted on the bottom of the mounting housing, and a cutting tool mechanism mounted on the milling drum. The walking device is equipped with a first drive that provides power for the rotation of the milling drum. The cutting tool mechanism includes a fixed shaft fixedly mounted on the mounting housing and extending into the milling drum, and multiple cutting tool assemblies evenly distributed along the axial direction of the fixed shaft. The cutting tool assembly includes a fixed gear plate fixedly mounted on the fixed shaft, multiple gears, and multiple spiral drills rotatably mounted on the outer wall of the milling drum. The multiple gears are respectively fixedly mounted on one end of the multiple spiral drills that extend into the milling drum.

Description

Technical Field

[0001] This utility model relates to the technical field of cement-stabilized crushed stone leveling, and in particular to a cement-stabilized crushed stone milling device. Background Technology

[0002] Cold recycled cement-stabilized crushed stone base course technology is an environmentally friendly construction process based on the recycling of old pavement materials. It involves milling and crushing the old pavement structural layer, adding cement, water, and necessary new aggregates, and then mixing, spreading, and compacting to form a new base course structure. This technology has advantages such as high resource utilization, short construction period, low cost, and significant environmental benefits. During construction, the surface of the old cement-stabilized crushed stone pavement needs to be milled to prepare for the laying of the new pavement.

[0003] Chinese utility model patent CN214882822U discloses a milling rotor, a milling working device, and a milling machine. The milling rotor includes: a milling drum; and at least one set of tool assemblies disposed on the outer surface of the milling drum and detachably connected to it. Each tool assembly includes multiple milling cutters for performing milling and cutting operations. The tool assemblies can be replaced individually according to different road construction requirements, allowing for the replacement of milling cutters of different specifications without disassembling the milling drum.

[0004] However, when the inventors implemented this device, they found the following defects: the cutter on the milling drum was fixed, and during the milling operation, only one side of the cutter was in contact with the cement-stabilized crushed stone pavement. The crushed stone aggregate contained in the cement-stabilized crushed stone pavement caused severe wear on one side of the cutter, resulting in a short service life for the cutter. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a cement-stabilized crushed stone milling device that enables full contact between the cutting tool and the crushed stone aggregate, improves the uniformity of friction across the cutting tool, and effectively extends the tool's service life.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a cement-stabilized crushed stone milling device, comprising a traveling device, a mounting housing hinged to the traveling device, an adjuster providing power for the rotation of the mounting housing, a milling drum rotatably mounted at the bottom of the mounting housing, and a tool mechanism mounted on the milling drum. The traveling device is equipped with a first drive unit providing power for the rotation of the milling drum. The tool mechanism includes a fixed shaft fixedly mounted on the mounting housing and extending into the milling drum, and multiple tool assemblies evenly distributed along the axial direction of the fixed shaft. Each tool assembly includes a fixed gear disc fixedly mounted on the fixed shaft and multiple gears. A wheel and multiple spiral drill bits are rotatably mounted on the outer wall of the milling drum. The spiral drill bits are evenly distributed around the circumference of the milling drum. Multiple gears are fixedly mounted on one end of each spiral drill bit that extends into the milling drum, and all gears mesh with a fixed gear disc. Furthermore, the traveling mechanism can be a hydraulic trolley, electric trolley, or handcart. The first drive is preferably a hydraulic motor, but it can also be an electric motor or other equivalent component that can drive the milling drum to rotate. The first drive is connected to the milling drum via a hollow coupling or chain. The milling drum is rotatably mounted on a fixed shaft. The fixed gear disc is preferably a bevel gear disc, and the gears are preferably bevel gears.

[0009] Preferably, the spiral drill bit is provided with a spiral guide groove, and the spiral drill bit is conical; furthermore, the tip of the spiral drill bit faces the side away from the milling drum.

[0010] Preferably, the adjuster includes a bracket hinged to the walker, a roller rotatably mounted on the bracket, and a drive cylinder that provides power for the bracket to swing up and down. One end of the drive cylinder is hinged to the walker, and the other end of the drive cylinder is hinged to the bracket. The bottom of the mounting housing is placed on the roller.

[0011] Preferably, the walking device is equipped with a cart bucket, and a belt conveyor extending upwards from the cart bucket is installed inside the mounting housing. A cleaning roller is rotatably installed at the bottom of the mounting housing. The cleaning roller is provided with a spiral brush that spirally winds towards the feeding end of the belt conveyor. A second driver is installed on the mounting housing to provide power for the rotation of the cleaning roller. Further, the second driver is preferably a hydraulic motor, but it can also be an electric motor or other equivalent components that can drive the cleaning roller to rotate. The second driver is connected to the cleaning roller via a hollow coupling or chain.

[0012] Preferably, two roller brushes are rotatably mounted on the bottom of the walker, and a third drive is mounted on the walker to provide power for the rotation of the roller brushes; a suction hopper is mounted on the bottom of the walker between the two roller brushes, and a suction fan is installed inside the hopper, with the suction end of the suction fan connected to the discharge end of the suction hopper; furthermore, the third drive is preferably a hydraulic motor, but the third drive can also be an electric motor or other equivalent components that can drive the roller brushes to rotate.

[0013] Preferably, a guide plate is installed inside the hopper, located below the discharge end of the belt conveyor. The guide plate is above the suction fan, and one end of the guide plate is inclined downwards towards the rear of the hopper. The discharge end of the suction fan faces the rear of the hopper. Further, the suction fan is located below the guide plate.

[0014] Preferably, the bracket is provided with a sliding groove, and a pin is installed in the sliding groove in a way that allows it to slide up and down. The output end of the drive cylinder is hinged to the pin.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a cement-stabilized crushed stone milling device with the following beneficial effects: the first driver drives the milling drum to rotate, so that each spiral drill bit can mill the cement-stabilized crushed stone pavement. At the same time, each gear moves in a circular motion around the fixed gear plate, thereby driving the spiral drill bit to rotate. During the rotation, the spiral drill bit forms a drilling effect on the cement-stabilized crushed stone pavement, which is conducive to the milling of crushed stone aggregate in the cement-stabilized crushed stone pavement. Throughout the process, all parts of the spiral drill bit can fully contact the crushed stone aggregate, improve the friction uniformity of the spiral drill bit, and effectively improve the service life of the spiral drill bit. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a top view schematic diagram of the structure of this utility model;

[0019] Figure 3 This is the utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0020] Figure 4 This is the utility model Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0021] Figure 5 This is the utility model Figure 1 A magnified schematic diagram of the structure at point C in the middle;

[0022] Figure 6 This is the utility model Figure 2 A magnified schematic diagram of the structure at point D in the middle;

[0023] Figure 7 This is the utility model Figure 3 A magnified schematic diagram of the structure at point E in the middle;

[0024] Figure 8 This is the utility model Figure 3Schematic diagram of the cross-sectional structure at the middle FF section;

[0025] The following are labels in the attached diagram: 1. Walking device; 2. Mounting housing; 3. Milling drum; 4. First driver; 5. Fixed shaft; 6. Fixed gear disc; 7. Gear; 8. Spiral drill bit; 9. Spiral guide groove; 10. Bracket; 11. Idler roller; 12. Drive cylinder; 13. Cargo bucket; 14. Belt conveyor; 15. Cleaning roller; 16. Spiral brush; 17. Second driver; 18. Roller brush; 19. Third driver; 20. Suction hopper; 21. Suction fan; 22. Guide plate; 23. Slide chute; 24. Pin. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Please see Figure 1-4 as well as Figure 6-7 This utility model discloses a cement-stabilized crushed stone milling device, comprising a traveling unit 1, a mounting housing 2 hinged to the traveling unit 1, an adjuster providing power for the rotation of the mounting housing 2, a milling drum 3 rotatably mounted inside the bottom of the mounting housing 2, and a tool mechanism mounted on the milling drum 3. The traveling unit 1 is equipped with a first drive 4 providing power for the rotation of the milling drum 3. The tool mechanism includes a fixed shaft 5 fixedly mounted on the mounting housing 2 and extending into the milling drum 3, and multiple tool assemblies evenly distributed along the axial direction of the fixed shaft 5. Each tool assembly includes a fixed gear disc 6 fixedly mounted on the fixed shaft 5, multiple gears 7, and multiple tools rotatably mounted on the milling drum 3. The milling drum 3 has multiple spiral drill bits 8 evenly distributed around its circumference. Multiple gears 7 are fixedly installed at the ends of the spiral drill bits 8 that extend into the milling drum 3, and all gears 7 mesh with the fixed gear plate 6. Furthermore, the traveling device 1 can be a hydraulic trolley, electric trolley, or manual trolley. The first drive 4 is preferably a hydraulic motor, but it can also be an electric motor or other equivalent component that can drive the milling drum 3 to rotate. The first drive 4 is connected to the milling drum 3 via a hollow coupling or chain. The milling drum 3 is rotatably mounted on the fixed shaft 5. The fixed gear plate 6 is preferably a bevel gear plate, and the gears 7 are preferably bevel gears.

[0029] For details, please refer to Figure 6The spiral drill bit 8 is provided with a spiral guide groove 9 and is cone-shaped; furthermore, the tip of the spiral drill bit 8 faces away from the milling drum 3.

[0030] For details, please refer to Figure 1 and Figure 3 The adjuster includes a bracket 10 hinged to the walker 1, a roller 11 rotatably mounted on the bracket 10, and a drive cylinder 12 that provides power for the bracket 10 to swing up and down. One end of the drive cylinder 12 is hinged to the walker 1, and the other end of the drive cylinder 12 is hinged to the bracket 10. The bottom of the mounting housing 2 is placed on the roller 11.

[0031] For details, please refer to Figure 5 The bracket 10 is provided with a sliding groove 23, and a pin 24 is installed in the sliding groove 23, which slides up and down. The output end of the drive cylinder 12 is hinged to the pin 24; the pin 24 is locked to the bracket 10. This arrangement allows for the adjustment of the angle of the belt conveyor 14.

[0032] The cement-stabilized crushed stone milling device provided in this embodiment has a conical spiral drill bit 8. Under the action of the spiral guide groove 9, the spiral drill bit 8 can be gradually spirally fed into the cement-stabilized crushed stone pavement, further improving the milling effect and efficiency of the crushed stone aggregate. By activating the drive cylinder 12, the output end of the drive cylinder 12 extends or shortens, and the bracket 10 moves down or up synchronously, thereby adaptively adjusting the distance between the bottom of the mounting housing 2 and the cement-stabilized crushed stone pavement, so as to adaptively adjust the milling depth of the spiral drill bit 8 on the milling drum 3. By adjusting the installation position of the pin 24 in the slide groove 23, the extreme installation position of the bracket 10 can be adaptively adjusted, thereby adjusting the extreme low position of the milling drum 3, thus meeting the needs of multi-condition use; and the whole The mounting housing 2 is hinged to the walking device 1. During the rotation of the milling drum 3, the mounting housing 2 swings up and down around the hinge point. During the swinging process of the mounting housing 2, the gravity of the mounting housing 2 and the gravity of the milling drum 3 are applied to the cement-stabilized crushed stone pavement through the spiral drill bit 8, forming a chiseling effect on the cement-stabilized crushed stone pavement, which is conducive to the smooth excavation of cement-stabilized crushed stone aggregate. It should be noted that if the cement-stabilized crushed stone pavement is too hard, a push plate (not shown in the figure) can be installed at the bracket 10. The push plate is located above the mounting housing 2. By starting the drive cylinder 12, a downward pushing force is formed on the mounting housing 2, so that the spiral drill bit 18 applies the gravity of the mounting housing 2, the gravity of the milling drum 3 and the pressure of the drive cylinder 12 to the hard cement-stabilized crushed stone pavement.

[0033] Example 2

[0034] The cement-stabilized crushed stone milling device provided in Example 1 has been further optimized. For details, please refer to [link / reference]. Figure 3 and Figure 8The walking device 1 is equipped with a cart 13, and a belt conveyor 14 extending upwards from the cart 13 is installed inside the mounting housing 2. A cleaning roller 15 is rotatably installed at the bottom inside the mounting housing 2. The cleaning roller 15 is provided with a spiral brush 16 that spirally winds towards the feeding end of the belt conveyor 14. A second drive 17 that provides power for the rotation of the cleaning roller 15 is installed on the mounting housing 2. Further, the second drive 17 is preferably a hydraulic motor. The second drive 17 can also be an electric motor or other equivalent components that can drive the cleaning roller 15 to rotate. The second drive 17 is connected to the cleaning roller 15 through a hollow coupling or chain.

[0035] For details, please refer to Figure 2-3 Two roller brushes 18 are rotatably mounted on the bottom of the walking device 1, and a third drive 19 is mounted on the walking device 1 to provide power for the rotation of the roller brushes 18; a suction hopper 20 is mounted on the bottom of the walking device 1 between the two roller brushes 18, and a suction fan 21 is installed in the hopper 13, with the suction end of the suction fan 21 connected to the discharge end of the suction hopper 20; furthermore, the third drive 19 is preferably a hydraulic motor, but the third drive 19 can also be an electric motor or other equivalent components that can drive the roller brushes 18 to rotate.

[0036] For details, please refer to Figure 3 Inside the hopper 13, there is a guide plate 22 located below the discharge end of the belt conveyor 14. The guide plate 22 is located above the suction fan 21. One end of the guide plate 22 is inclined downward towards the rear of the hopper 13. The discharge end of the suction fan 21 faces the rear of the hopper 13. Furthermore, the suction fan 21 is located below the guide plate 22.

[0037] The cement-stabilized crushed stone milling device provided in this embodiment uses a second driver 17 to drive the cleaning roller 15 to rotate. The spiral brush 16 on the cleaning roller 15 sweeps the milled cement-stabilized crushed stone aggregate towards the feeding end of the belt conveyor 14. After entering the belt conveyor 14, the cement-stabilized crushed stone aggregate is transported into the hopper 13. Meanwhile, a third driver 19 drives the roller brush 18 to rotate. Both roller brushes 18 rotate towards the middle of the walker 1, causing some scattered cement fragments to gather towards the bottom center of the walker 1. The suction fan 21 sucks this part of the scattered cement-stabilized crushed stone into the hopper 13, realizing automatic cleaning and collection of cement-stabilized crushed stone aggregate and improving the convenience of cement-stabilized crushed stone aggregate collection. The guide plate 22 can... The cement-aggregate conveyed by the belt conveyor 14 is guided to the rear of the truck bed 13 to prevent it from falling onto the suction fan 21. The cement-aggregate suctioned by the suction fan 21 is also conveyed to the rear of the truck bed 13. When unloading, the rear door of the truck bed 13 can be opened directly, and the cement-aggregate can be moved out of the truck bed 13 to improve the convenience of unloading the cement-aggregate. In another embodiment, the truck bed 13 can also be divided into an upper cavity and a lower cavity from top to bottom. The upper cavity is used to receive the cement-aggregate conveyed by the belt conveyor 14, and the lower cavity is used to store the cement-aggregate suctioned by the suction fan 13 to prevent the material discharged from the belt conveyor 14 from blocking the discharge end of the suction fan 21.

[0038] In use, the walking device 1 moves to the cement-stabilized crushed stone pavement to be milled. The first driver 4 drives the milling drum 3 to rotate, and each gear 7 rotates around the fixed gear plate 6, thereby driving the spiral drill 8 to rotate. During the rotation, the spiral drill 8 mills the cement-stabilized crushed stone pavement. The second driver 17 drives the sweeping roller 15 to rotate, and the cement crushed stone aggregate is collected by the spiral brush 16. The belt conveyor 14 transports the collected cement crushed stone aggregate into the truck bed 13, realizing the milling of the cement-stabilized crushed stone pavement and the collection of crushed materials.

[0039] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A milling device for cement-stabilized crushed stone, characterized in that, The device includes a walker (1), a mounting housing (2) hinged to the walker (1), an adjuster that provides power for the rotation of the mounting housing (2), a milling drum (3) rotatably mounted on the bottom of the mounting housing (2), and a tool mechanism mounted on the milling drum (3). The walker (1) is equipped with a first driver (4) that provides power for the rotation of the milling drum (3). The tool mechanism includes a fixed shaft (5) fixedly mounted on the mounting housing (2) and extending into the milling drum (3), and multiple tool assemblies evenly distributed along the axial direction of the fixed shaft (5). The tool assembly includes a fixed gear disc (6) fixedly mounted on the fixed shaft (5), multiple gears (7), and multiple spiral drills (8) rotatably mounted on the outer wall of the milling drum (3). The multiple spiral drills (8) are evenly distributed around the milling drum (3). The multiple gears (7) are respectively fixedly mounted on one end of the multiple spiral drills (8) extending into the milling drum (3). The multiple gears (7) mesh with the fixed gear disc (6).

2. The cement-stabilized crushed stone milling device according to claim 1, characterized in that, The spiral drill bit (8) is provided with a spiral guide groove (9), and the spiral drill bit (8) is in the shape of a cone.

3. The cement-stabilized crushed stone milling device according to claim 1, characterized in that, The adjuster includes a bracket (10) hinged to the walker (1), a roller (11) rotatably mounted on the bracket (10), and a drive cylinder (12) that provides power for the bracket (10) to swing up and down. One end of the drive cylinder (12) is hinged to the walker (1), and the other end of the drive cylinder (12) is hinged to the bracket (10). The bottom of the mounting housing (2) is placed on the roller (11).

4. The cement-stabilized crushed stone milling device according to claim 1, characterized in that, The walking device (1) is equipped with a cart (13), and a belt conveyor (14) extending upwards from the cart (13) is installed inside the mounting housing (2). A cleaning roller (15) is rotatably installed at the bottom inside the mounting housing (2). A spiral brush (16) is provided on the cleaning roller (15) and spirally coiled at the feeding end of the belt conveyor (14). A second drive (17) is installed on the mounting housing (2) to provide power for the rotation of the cleaning roller (15).

5. The cement-stabilized crushed stone milling device according to claim 4, characterized in that, Two roller brushes (18) are rotatably mounted on the bottom of the walking device (1), and a third driver (19) is mounted on the walking device (1) to provide power for the rotation of the roller brushes (18); a suction hopper (20) located between the two roller brushes (18) is mounted on the bottom of the walking device (1), and a suction fan (21) is installed in the hopper (13), with the suction end of the suction fan (21) connected to the discharge end of the suction hopper (20).

6. The cement-stabilized crushed stone milling device according to claim 5, characterized in that, The hopper (13) is equipped with a guide plate (22) located below the discharge end of the belt conveyor (14). The guide plate (22) is located above the suction fan (21). One end of the guide plate (22) is inclined downward towards the rear of the hopper (13). The discharge end of the suction fan (21) faces the rear of the hopper (13).

7. The cement-stabilized crushed stone milling device according to claim 3, characterized in that, The bracket (10) is provided with a sliding groove (23), and a pin (24) is installed in the sliding groove (23) and slides up and down. The output end of the drive cylinder (12) is hinged to the pin (24), and the pin (24) is locked to the bracket (10).

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