Walking type asphalt concrete pavement milling and napping machine

Abstract

The utility model relates to the field of pavement milling machines, and discloses a walking asphalt concrete pavement milling napping machine which comprises a frame, a moving mechanism, a steering mechanism, a lifting mechanism, a power mechanism, a spraying mechanism and a milling machine tool, a handrail is arranged at the top of the frame; the moving mechanism comprises wheels, and the wheels are rotatably arranged at the bottom of the frame; the input end of the steering mechanism penetrates through the top of the frame, the output end of the steering mechanism is connected with at least one wheel, and the steering mechanism is used for controlling the advancing direction of the wheel; the milling machine tool is mounted at the bottom of the frame; the lifting mechanism is mounted between the frame and the moving mechanism and is used for controlling the distance between the frame and the moving mechanism; the power mechanism is used for providing power for the milling machine tool; the spraying mechanism comprises a spray head which is used for spraying water to the milling machine tool and the road surface. By using the steering mechanism, the problem that the conventional milling equipment must be forcibly pushed to steer and is limited in use in a narrow space is solved.

Description

Technical Field

[0001] The utility model relates to the field of road milling machines, in particular to a hand-held asphalt concrete road milling and roughening machine. Background Art

[0002] Pavement milling machines are widely used in asphalt pavement maintenance and renovation projects, particularly in large-scale locations such as highways, urban roads, and airports. These machines mill old pavement material to provide a smooth base for the laying of new material, effectively extending the service life of the pavement and facilitating the reuse of old pavement materials.

[0003] Conventional large milling machines are limited in operation in narrow areas such as municipal roads and residential areas, and are also expensive. There is an increasing demand for small, flexible equipment in small or local maintenance operations.

[0004] Although existing small milling machines have improved in flexibility, they still have the problem of insufficient maneuverability. Therefore, there is a need for a more maneuverable, lower-cost device that can adapt to complex construction environments. Utility Model Content

[0005] In view of the above-mentioned defects, the purpose of the present invention is to provide a hand-held asphalt concrete pavement milling and roughening machine, which is easy to turn and suitable for operations in confined spaces.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A hand-held asphalt concrete pavement milling and roughening machine comprises a frame, a moving mechanism, a steering mechanism, a lifting mechanism, a power mechanism, a spraying mechanism and a milling tool;

[0008] A handrail is provided on the top of the frame;

[0009] The moving mechanism includes wheels, which are rotatably arranged at the bottom of the frame;

[0010] The input end of the steering mechanism is provided on the top of the frame, and the output end of the steering mechanism is connected to at least one of the wheels, and the steering mechanism is used to control the direction of travel of the wheel;

[0011] The milling machine is installed at the bottom of the frame;

[0012] The lifting mechanism is installed between the frame and the moving mechanism, and is used to control the distance between the frame and the moving mechanism;

[0013] The power mechanism is used to provide power for the milling machine;

[0014] The spraying mechanism includes a spray head, which is used to spray water toward the milling machine and the road surface.

[0015] Specifically, the power mechanism is also used to provide power to the moving mechanism, and the moving mechanism is used to drive the movement of the frame;

[0016] The moving mechanism includes a front wheel structure, a rear wheel structure and a drive shaft;

[0017] The front wheel structure includes a front wheel and a front wheel axle, wherein the front wheel axle is inserted into a through hole on the front side of the bottom of the frame, and the front wheel is rotatably mounted on the front wheel axle;

[0018] The rear wheel structure has two sets, and the two sets of rear wheel structures are symmetrically arranged at both ends of the drive shaft. The rear wheel structure includes a rear wheel rocker arm, a rear wheel universal shaft and a rear wheel. The rear wheel includes a rear tire and a rear wheel hub. The rear tire is mounted on the rear wheel hub. The rear wheel hub is connected to one end of the rear wheel universal shaft, and the other end of the rear wheel universal shaft is connected to one end of the drive shaft. One end of the rear wheel rocker arm is provided with a rear wheel rocker arm sleeve, and the end of the rear wheel universal shaft connected to the rear wheel hub is rotatably fixed in the rear wheel rocker arm sleeve, and the other end of the rear wheel rocker arm is horizontally rotatably fixed to the lifting mechanism;

[0019] The drive shaft is connected to the power mechanism, and the drive shaft is rotatably fixed in the drive shaft sleeve of the lifting mechanism;

[0020] The steering mechanism includes an operating steering wheel, a connecting rod and a steering shaft. The connecting rod is rotatably inserted into a through hole of the vehicle frame. The center of the operating steering wheel is fixed to one end of the connecting rod. The other end of the connecting rod is transmission-connected to the steering shaft. Both sides of the steering shaft are connected to the rear wheel rocker arms.

[0021] Specifically, the lifting mechanism includes a first lifting knob, a first lifting screw and a first lifting motor. The first lifting knob is arranged near the top of the frame, the first lifting screw is installed on the frame, and the first lifting motor is used to drive the rotation of the first lifting screw. The rotation of the first lifting screw is used to change the distance between the frame and the moving mechanism.

[0022] Specifically, the lifting mechanism also includes a second lifting button, a second lifting screw, a second lifting motor, a third lifting button, a third lifting screw and a third lifting motor. The second lifting screw and the third lifting screw are installed on the frame. The second lifting motor is used to drive the rotation of the second lifting screw, and the third lifting motor is used to drive the rotation of the third lifting screw. The rotation of the second lifting screw and the rotation of the second lifting screw are respectively used to change the height of the two ends of the milling machine.

[0023] Specifically, the power mechanism includes a diesel engine, a fuel tank and a generator. The fuel tank is fixed near the top of the frame. The fuel tank is provided with a fuel tank port, a fuel tank cover and an observation window. The bottom of the fuel tank is connected to the input port of the diesel engine through a pipeline. The diesel engine and the generator are transmission-connected, and the generator is electrically connected to the milling machine or the lifting mechanism.

[0024] Specifically, the spray mechanism includes a nozzle, a water tank, a water pipe, a valve and a filter. The water tank is fixed near the top of the frame. A water tank port is provided on the water tank. One end of the water pipe is connected to the bottom of the water tank, and the other end of the water pipe is connected to the nozzle. The water pipe is provided with a valve at a position close to the water tank, and a filter is provided at the bottom of the water tank.

[0025] Specifically, it also includes a start switch and an emergency brake switch, and the start switch and the emergency brake switch are electrically connected to the diesel engine.

[0026] Specifically, a milling tool protection box is provided at the bottom of the frame, and the milling tool protection box includes a horizontally extending protective surface and a flange bent downward along the outer periphery of the protective surface, and the milling tool is installed below the milling tool protection box; the power mechanism part is provided above the milling tool protection box, and a power mechanism protection cover is provided on the outer periphery of the power mechanism above the milling tool protection box.

[0027] Specifically, the milling machine includes a milling motor and a milling cutter head. The milling motor is electrically connected to the power mechanism. The milling cutter head is a cylindrical cutter head composed of 120 milling teeth. The milling teeth are made of hard alloy and have a length of 100 mm.

[0028] The technical solution provided by the utility model may have the following beneficial effects:

[0029] By using the steering mechanism, the steering is flexible during milling operations, making the hand-held asphalt concrete pavement milling and roughening machine more suitable for use in municipal roads and community roads where the operation of small milling machines is restricted, solving the problem that conventional milling equipment must be forced to turn and is limited in use in small spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional view of a hand-held asphalt concrete pavement milling and roughening machine in an embodiment of the utility model.

[0031] Figure 2 This is a front view of a hand-held asphalt concrete pavement milling and roughening machine in an embodiment of the present utility model.

[0032] Figure 3It is a left view of the hand-held asphalt concrete pavement milling and roughening machine in the embodiment of the utility model.

[0033] Figure 4 It is a rear view of the hand-held asphalt concrete pavement milling and roughening machine in the embodiment of the present utility model.

[0034] Among them: frame 1, moving mechanism 2, front wheel structure 21, rear wheel structure 22, rear wheel rocker arm 221, rear wheel universal joint 222, rear wheel rocker arm sleeve 223, steering mechanism 3, operating steering wheel 31, connecting rod 32, steering shaft 33, lifting mechanism 4, first lifting knob 41, driving mechanism 5, diesel engine 51, fuel tank 52, fuel tank port 521, generator 53, spray mechanism 6, spray head 61, water tank 62, water tank port 621, water pipe 63, valve 64, milling machine 7, start switch 81, emergency brake switch 82, milling machine protection box 91, driving mechanism protection cover 92. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish between the described features, without distinction of order or importance.

[0037] In the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] The following describes embodiments of the present utility model in conjunction with the accompanying drawings.

[0040] A hand-held asphalt concrete pavement milling and roughening machine, comprising a frame 1, a moving mechanism 2, a steering mechanism 3, a lifting mechanism 4, a power mechanism 5, a spraying mechanism 6 and a milling tool 7;

[0041] A handrail 11 is provided on the top of the frame 1;

[0042] The moving mechanism 2 includes wheels, which are rotatably arranged at the bottom of the frame 1;

[0043] The input end of the steering mechanism 3 is provided on the top of the frame 1, and the output end of the steering mechanism 3 is connected to at least one of the wheels. The steering mechanism 3 is used to control the direction of travel of the wheel.

[0044] The milling machine 7 is installed at the bottom of the frame 1;

[0045] The lifting mechanism 4 is installed between the frame 1 and the moving mechanism 2, and the lifting mechanism 4 is used to control the distance between the frame 1 and the moving mechanism 2;

[0046] The power mechanism 5 is used to provide power to the milling tool 7;

[0047] The spray mechanism 6 includes a spray head 61 , and the spray head 61 is used to spray water toward the milling machine 7 and the road surface.

[0048] By using the steering mechanism 3, the steering is flexible during milling operations, making the hand-held asphalt concrete pavement milling and roughening machine more suitable for use in municipal roads and community roads where the operation of small milling machines is restricted, thereby solving the problem that conventional milling equipment must be forced to turn and is limited in use in small spaces.

[0049] like Figure 4In one embodiment, the moving mechanism 2 includes two rear wheels and one front wheel. The front wheel is arranged in front of the bottom of the frame 1. The front wheel can only rotate in the forward and backward directions. The steering mechanism 3 is connected to the two rear wheels and can control the horizontal rotation of the rear wheels to achieve convenient steering. The mobile work can be achieved by holding the handrail 11 and pushing it. The working height of the milling tool 7 is adjusted by the lifting mechanism 4. The power mechanism 5 provides power to drive the milling tool 7 to rotate. The rotation of the milling tool 7 mills the road surface. At the same time, the spraying mechanism 6 adds water, and the water is sprayed through the nozzle 61 to cool the milling tool 7 to reduce the wear of the cutter head and reduce the dust caused by the milling work.

[0050] Specifically, the power mechanism 5 is also used to provide power to the moving mechanism 2, and the moving mechanism 2 is used to drive the movement of the frame 1;

[0051] The mobile mechanism 2 includes a front wheel structure 21, a rear wheel structure 22 and a drive shaft 23;

[0052] The front wheel structure 21 includes a front wheel and a front wheel axle. The front wheel axle is inserted into a through hole on the front side of the bottom of the frame 1. The front wheel is rotatably mounted on the front wheel axle.

[0053] The rear wheel structure 22 has two sets, and the two sets of rear wheel structures 22 are symmetrically arranged at both ends of the drive shaft 23. The rear wheel structure 22 includes a rear wheel rocker arm 221, a rear wheel universal shaft 222 and a rear wheel. The rear wheel includes a rear tire and a rear wheel hub. The rear tire is mounted on the rear wheel hub. The rear wheel hub is connected to one end of the rear wheel universal shaft 222, and the other end of the rear wheel universal shaft 222 is connected to one end of the drive shaft 23. One end of the rear wheel rocker arm 221 is provided with a rear wheel rocker arm sleeve 223, and the end of the rear wheel universal shaft 222 connected to the rear wheel hub is rotatably fixed in the rear wheel rocker arm sleeve 223. The other end of the rear wheel rocker arm 221 is horizontally rotatably fixed to the bottom of the lifting mechanism 4;

[0054] The drive shaft 23 is connected to the power mechanism 5, and the drive shaft 23 is rotatably fixed in the drive shaft sleeve at the bottom of the lifting mechanism 4;

[0055] The steering mechanism 3 includes an operating steering wheel 31, a connecting rod 32 and a steering shaft 33. The connecting rod 32 is rotatably inserted into the through hole of the frame 1. The center of the operating steering wheel 31 is fixed to one end of the connecting rod 32. The other end of the connecting rod 32 is transmission-connected to the steering shaft 33. Both sides of the steering shaft 33 are connected to the rear wheel rocker arm 221.

[0056] like Figure 1 、 Figure 2 and Figure 3In one embodiment, the connecting rod 32 is a crankshaft structure. One section of the connecting rod 32 is a vertically disposed long straight side, which can rotate about the central axis of the long straight side. The bottom of the connecting rod 32 is a bent crankshaft section. The connection between the connecting rod 32 and the steering shaft 33 is spaced apart from the central axis of the long straight side of the connecting rod 32. The center of the steering wheel 31 is fixed to the top of the long straight side of the connecting rod 32, and the steering shaft 33 is arranged parallel to the rear wheel axle. When the steering wheel 31 is turned, the steering wheel 31 drives the connecting rod 32 to rotate, causing the bottom end of the connecting rod 32 to rotate horizontally and drive the steering shaft 33 to move. The steering shaft 33 drives the rear wheel rocker arm 221 to rotate horizontally about the end fixed to the bottom of the vehicle frame 1. The rear wheel rocker arm 221 drives one end of the rear wheel universal joint 222 and the rear wheel connected to the rear wheel universal joint 222 to rotate horizontally, thereby achieving convenient steering of the rear wheels.

[0057] Specifically, the lifting mechanism 4 includes a first lifting knob 41, a first lifting screw and a first lifting motor. The first lifting knob 41 is arranged near the top of the frame 1, the first lifting screw is installed on the frame 1, and the first lifting motor is used to drive the rotation of the first lifting screw, and the rotation of the first lifting screw is used to change the distance between the frame 1 and the moving mechanism 2.

[0058] In one embodiment, the milling tool 7 is fixed to the bottom of the frame 1 by screws, and the first lifting button is used to control the first lifting screw to adjust the height between the frame 1 and the wheel, which can change the height of the frame from the ground. At the same time, the milling tool 7 fixed to the bottom of the frame 1 rises and falls with the frame 1, changing the height between the milling tool 7 and the road surface to adapt to different working height requirements.

[0059] Specifically, the lifting mechanism 4 also includes a second lifting button, a second lifting screw, a second lifting motor, a third lifting button, a third lifting screw and a third lifting motor. The second lifting screw and the third lifting screw are installed on the frame 1. The second lifting motor is used to drive the rotation of the second lifting screw, and the third lifting motor is used to drive the rotation of the third lifting screw. The rotation of the second lifting screw and the rotation of the second lifting screw are respectively used to change the height of the two ends of the milling machine 7.

[0060] In a preferred embodiment, the milling tool 7 is secured to the vehicle frame 1 via a second lifting screw and a third lifting screw. The height of each end of the milling tool 7 can be adjusted using a second lifting button (controlled by the second lifting screw) and a third lifting button (controlled by the third lifting screw), respectively. This allows for precise fine-tuning of the milling tool 7 for milling joints or other inclined sections of the road surface. In a specific embodiment, by adjusting the height of each end of the milling tool 7, one end of the milling tool 7 can mill a 2.5 cm thickness, while the other end can be roughened.

[0061] Specifically, the power mechanism 5 includes a diesel engine 51, a fuel tank 52 and a generator 53. The fuel tank 52 is fixed near the top of the frame 1. The fuel tank 52 is provided with a fuel tank port 521, a fuel tank cover and an observation window. The bottom of the fuel tank 52 is connected to the input port of the diesel engine 51 through a pipeline. The diesel engine 51 and the generator 53 are transmission-connected, and the generator 53 is electrically connected to the milling machine 7 or the lifting mechanism 4.

[0062] In one embodiment, No. 0 diesel is used as fuel, and the power mechanism 5 adopts a diesel engine 51 to drive the generator 53 through the universal crankshaft to generate electricity to supply power to the lifting mechanism 4 and the power mechanism 5. Before use, check whether the fuel tank cap is closed and check through the observation window whether the oil level meets the working requirements.

[0063] In other embodiments, as a simple replacement, the transmission connection between the diesel engine 51 and the generator 53 can be achieved by similar means such as belts, gears, and chains.

[0064] Specifically, the spray mechanism 6 includes a nozzle 61, a water tank 62, a water pipe 63, a valve 64 and a filter. The water tank 62 is fixed near the top of the frame 1. A water tank port 621 is provided on the water tank 62. One end of the water pipe 63 is connected to the bottom of the water tank 62, and the other end of the water pipe 63 is connected to the nozzle 61. The water pipe 63 is provided with a valve 64 at a position close to the water tank 62, and a filter is provided at the bottom of the water tank 62.

[0065] In one embodiment, water is used as the spraying solution, the valve 64 is opened, and the flow rate is adjusted by the valve 64. The water in the water tank 62 at the top of the frame 1 passes through the filter under the action of gravity, and flows into the nozzle 61 through the water pipe 63. The nozzle 61 arranged above the milling tool 7 sprays the water onto the milling tool 7 and the road surface.

[0066] Specifically, it further includes a start switch 81 and an emergency brake switch 82 , and the start switch 81 and the emergency brake switch 82 are electrically connected to the diesel engine 51 .

[0067] In one embodiment, the power mechanism 5 uses a diesel engine 51 and a generator 53. The diesel engine 51 is started by starting the switch 81, and the diesel engine 51 drives the generator 53 to drive the milling and roughening machine to operate. The diesel engine 51 is turned off by the emergency brake switch 82 to stop.

[0068] Specifically, a milling tool protection box 91 is provided at the bottom of the frame 1, and the milling tool protection box 91 includes a horizontally extending protective surface and a flange bent downward along the outer periphery of the protective surface. The milling tool 7 is installed below the milling tool protection box 91; the power mechanism 5 is partially provided above the milling tool protection box 91, and a power mechanism protection cover 92 is provided on the outer periphery of the power mechanism 5 above the milling tool protection box 91.

[0069] like Figure 3 In one embodiment, a milling tool protection box 91 and a power mechanism protection cover 92 are provided to protect components rotating at high speeds during operation, prevent debris from entering and causing damage to the equipment, and improve safety in use.

[0070] Specifically, the milling machine 7 includes a milling motor and a milling cutter head. The milling motor is electrically connected to the power mechanism 5. The milling cutter head is a cylindrical cutter head composed of 120 milling teeth. The milling teeth are made of hard alloy and have a length of 100 mm.

[0071] With this structure, the cylindrical milling cutter head is driven to rotate by the milling motor, and the 100mm hard alloy milling teeth are suitable for use on small equipment and operations in confined spaces.

[0072] Other structures and operations according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0073] Throughout this specification, references to terms such as "embodiment" and "example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hand-held asphalt concrete pavement milling and roughening machine, characterized by: It includes a vehicle frame, a moving mechanism, a steering mechanism, a lifting mechanism, a power mechanism, a spraying mechanism and milling equipment; A handrail is provided on the top of the frame; The moving mechanism includes wheels, which are rotatably arranged at the bottom of the frame; The input end of the steering mechanism is provided on the top of the frame, and the output end of the steering mechanism is connected to at least one of the wheels, and the steering mechanism is used to control the direction of travel of the wheel; The milling machine is installed at the bottom of the frame; The lifting mechanism is installed between the frame and the moving mechanism, and the lifting mechanism is used to control the distance between the frame and the moving mechanism; The power mechanism is used to provide power for the milling machine; The spraying mechanism includes a spray head, which is used to spray water toward the milling machine and the road surface.

2. The hand-held asphalt concrete pavement milling and roughening machine according to claim 1, characterized in that: The power mechanism is also used to provide power to the moving mechanism, and the moving mechanism is used to drive the movement of the frame; The moving mechanism includes a front wheel structure, a rear wheel structure and a drive shaft; The front wheel structure includes a front wheel and a front wheel axle, wherein the front wheel axle is inserted into a through hole on the front side of the bottom of the frame, and the front wheel is rotatably mounted on the front wheel axle; The rear wheel structure has two sets, and the two sets of rear wheel structures are symmetrically arranged at both ends of the drive shaft. The rear wheel structure includes a rear wheel rocker arm, a rear wheel universal shaft and a rear wheel. The rear wheel includes a rear tire and a rear wheel hub. The rear tire is mounted on the rear wheel hub. The rear wheel hub is connected to one end of the rear wheel universal shaft, and the other end of the rear wheel universal shaft is connected to one end of the drive shaft. One end of the rear wheel rocker arm is provided with a rear wheel rocker arm sleeve, and the end of the rear wheel universal shaft connected to the rear wheel hub is rotatably fixed in the rear wheel rocker arm sleeve, and the other end of the rear wheel rocker arm is horizontally rotatably fixed to the lifting mechanism; The drive shaft is connected to the power mechanism, and the drive shaft is rotatably fixed in the drive shaft sleeve at the bottom of the lifting mechanism; The steering mechanism includes an operating steering wheel, a connecting rod and a steering shaft. The connecting rod is rotatably inserted into a through hole of the vehicle frame. The center of the operating steering wheel is fixed to one end of the connecting rod. The other end of the connecting rod is transmission-connected to the steering shaft. Both sides of the steering shaft are connected to the rear wheel rocker arms.

3. The hand-held asphalt concrete pavement milling and roughening machine according to claim 1, characterized in that: The lifting mechanism includes a first lifting knob, a first lifting screw and a first lifting motor. The first lifting knob is arranged near the top of the frame. The first lifting screw is installed on the frame. The first lifting motor is used to drive the rotation of the first lifting screw. The rotation of the first lifting screw is used to change the distance between the frame and the moving mechanism.

4. The hand-held asphalt concrete pavement milling and roughening machine according to claim 1, characterized in that: The lifting mechanism also includes a second lifting button, a second lifting screw, a second lifting motor, a third lifting button, a third lifting screw and a third lifting motor. The second lifting screw and the third lifting screw are installed on the frame. The second lifting motor is used to drive the rotation of the second lifting screw. The third lifting motor is used to drive the rotation of the third lifting screw. The rotation of the second lifting screw and the rotation of the second lifting screw are respectively used to change the height of the two ends of the milling machine.

5. The hand-held asphalt concrete pavement milling and roughening machine according to claim 1, characterized in that: The power mechanism includes a diesel engine, a fuel tank and a generator. The fuel tank is fixed near the top of the frame. The fuel tank is provided with a fuel tank port, a fuel tank cover and an observation window. The bottom of the fuel tank is connected to the input port of the diesel engine through a pipeline. The diesel engine and the generator are transmission-connected, and the generator is electrically connected to the milling machine or the lifting mechanism.

6. The hand-held asphalt concrete pavement milling and roughening machine according to claim 1, characterized in that: The spray mechanism includes a nozzle, a water tank, a water pipe, a valve and a filter. The water tank is fixed near the top of the frame. A water tank port is provided on the water tank. One end of the water pipe is connected to the bottom of the water tank, and the other end of the water pipe is connected to the nozzle. The water pipe is provided with a valve at a position close to the water tank, and a filter is provided at the bottom of the water tank.

7. The hand-held asphalt concrete pavement milling and roughening machine according to claim 5, characterized in that: It also includes a start switch and an emergency brake switch, and the start switch and the emergency brake switch are electrically connected to the diesel engine.

8. The hand-held asphalt concrete pavement milling and roughening machine according to claim 1, characterized in that: A milling tool protection box is provided at the bottom of the frame, and the milling tool protection box includes a horizontally extending protection surface and a flange bent downward along the outer periphery of the protection surface. The milling tool is installed below the milling tool protection box; the power mechanism is partially provided above the milling tool protection box, and a power mechanism protection cover is provided on the outer periphery of the power mechanism above the milling tool protection box.

9. The hand-held asphalt concrete pavement milling and roughening machine according to claim 1, characterized in that: The milling machine includes a milling motor and a milling cutter head. The milling motor is electrically connected to the power mechanism. The milling cutter head is a cylindrical cutter head composed of 120 milling teeth. The milling teeth are made of hard alloy and have a length of 100 mm.

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