A milling machine for highway pavement maintenance projects

Abstract

The present invention discloses a milling machine for highway pavement maintenance projects, including a frame. A driving wheel and a handle are provided at the rear side of the frame. A control area is installed on the handle. A motor is installed on the upper side of the middle part of the frame. A rotor is rotatably connected inside the frame. A plurality of cutter heads are provided on the outer side of the rotor. A crushing assembly is provided in front of the rotor, and a cleaning assembly is provided at the rear side of the rotor. Through the setting of the crushing assembly in the present invention, the pavement to be treated is preliminarily crushed and acts synchronously with the cutter heads to improve the crushing effect. Through the setting of the cleaning assembly in the present invention, the crushed raw materials are moved to one side, facilitating later cleaning. Through the retractable design of the cutter heads in the present invention, while extruding and crushing, they can automatically rotate, using the shearing force to assist in crushing the pavement. And through the setting of the elastic seat and the connecting pipe, the height of the cutter heads can be automatically adjusted, adapting to the situations of too long or too short cutter heads and maintaining a good crushing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of milling machines, and more particularly to a milling machine for highway pavement maintenance projects. Background Art

[0002] During the process of highway pavement maintenance, machines such as cold milling machines are usually used to break up or remove the surface from the paved area. Cold milling machines, also known as road crushers, usually include a milling system. The milling system includes a milling drum with multiple teeth. The milling system obtains power from the engine through a suitable interface to rotate the milling drum in the cutting chamber (milling chamber) so as to perform a milling operation on the surface of the paved area. The surface of the paved area is broken due to the rotation of the milling drum against the surface (and its teeth digging into and tearing the surface).

[0003] The Chinese patent discloses a cantilever wheel frame for a road milling machine (authorized announcement number CN201128873U). This patented technology can be directly installed on the hub of the cantilever shaft from the open side, and its installation and disassembly process is very convenient. However, it can only replace the wheels, and it is not applicable to the more easily worn cutter heads and tool holders of the milling machine. Moreover, after local wear of the existing cutter heads, it will cause uneven milling, and the depth of some areas is inconsistent. When performing deep milling on the road surface, it is easy to lift the entire road surface, increasing the milling difficulty and reducing the milling effect. Therefore, the present invention provides a milling machine for highway pavement maintenance projects to solve the problems raised in the above background art. Summary of the Invention

[0004] The purpose of the present invention is to provide a milling machine for highway pavement maintenance projects to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A milling machine for highway pavement maintenance projects includes a frame. A drive wheel and a handle are provided at the rear side of the frame. A control area is installed on the handle. The connecting rod of the drive wheel is V-shaped and is fixed to the lower side of the handle at the front end to support the frame. An inclined rod is fixed between the frame and the handle to improve the connection strength. A motor is installed on the upper side of the middle part of the frame. A rotor is rotatably connected inside the frame. A number of cutter heads are provided outside the rotor. A crushing component is provided in front of the rotor, and a cleaning component is provided behind the rotor. The motor is connected to a vertical rotating shaft through a belt component. The lower end of the vertical rotating shaft is connected to a transmission box through bevel gears. A middle gear is rotatably connected inside the transmission box. The lower sides of the bevel gears are respectively engaged with the bevel gear of the middle gear and the bevel gear of the drive shaft. The drive shaft is fixedly connected to the rotor. The middle gear is connected to the crushing component and the cleaning component through two belts respectively;

[0007] On one side of the frame facing the drive box, there is a maintenance cover. One side of the maintenance cover is connected to the frame by a hinge, and the other side is fixed to the frame by bolts. On the side of the maintenance cover facing the rotor, there is a fixing bracket. The fixing bracket is fixed to the frame by bolts around it. In the middle of the fixing bracket, there is a groove for accommodating the bearing disc. The bearing in the bearing disc is connected to the drive shaft. The cutter head is rotatably connected in the slot hole of the rotor. There is an annular notch at the waist of the cutter head, and the cutter head is rotatably connected to the guide post through an arc-shaped groove. There is a spring in the cutter head. The upper end of the spring is fixedly connected to the guide post, and the lower end of the spring can be clamped on the convex point on the guide post. On the side of the guide post away from the cutter head, there is an elastic seat. The elastic seats are connected by a communication pipe. The lower sides of the elastic seat and the guide post are both clamped in the receiving seat. The receiving seat is slidably connected in the rotor chute, and a U-shaped clamping strip is clamped on the upper side of the receiving seat. The U-shaped clamping strip is clamped in the annular notch at the waist. The ends of the receiving seat and the U-shaped clamping strip are both fixed in the rotor by a cover. The frictional force between the guide post and the cutter head is less than the torsion force of the spring, so that under the action of the spring, the cutter head rotates reversely along the guide post and returns to its original state;

[0008] The striking shaft in the crushing assembly is connected to the intermediate gear by a belt. A number of cams are fixed on the striking shaft. The outer side of the cam is rotatably connected in the through hole of the striking plate. The striking plate is slidably connected up and down in the crushing assembly slot. The striking plate and the rear cutter head reach the lowest point at the same time in the advancing direction of the frame. The cutter head mills upward, and the striking plate strikes downward synchronously, which is convenient for crushing the road surface. The cleaning assembly includes a horizontal spiral blade. There is a receiving box above the spiral blade to guide the raw materials falling from above into the spiral blade. Through the rotation of the spiral blade, the raw materials are concentrated on one side of the frame, which is convenient for later cleaning.

[0009] Preferably, the outer edge of the lower side of the frame is evenly provided with bristles to block gravel.

[0010] Preferably, an anti-slip pad is provided on the side of the maintenance cover facing the fixing bracket. The anti-slip pad is pressed against the bearing disc to help stabilize the bearing disc.

[0011] Preferably, the cutter heads are arranged in a staggered manner in the rotation direction of the rotor, and the cutter heads are arranged side by side in the axial direction of the rotor, so that the cutter heads face the receiving seat.

[0012] Preferably, the elastic seat is a spring airbag, which is composed of an outer spring and an inner airbag and can generate deformation.

[0013] Preferably, a valve is connected to the end of the communication pipe. The valve is located outside the receiving seat and can adjust the elastic force of the elastic seat at the initial stage.

[0014] Preferably, a guide groove is provided at the position of the receiving seat facing the U-shaped clamping strip to prevent the U-shaped clamping strip from deflecting.

[0015] Preferably, a clamping strip is fixed to the lower side of the guide post, and the clamping strip is clamped on the receiving seat to prevent the guide post from rotating, and then drive the cutter head to rotate through the thread.

[0016] Preferably, the lower end of the knocking plate is pointed and is used to break the road surface.

[0017] Preferably, a brush is fixed to the upper side of one end of the receiving box close to the rotor to clean the outside of the rotor and the cutter head.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. Through the setting of the crushing component, the present invention preliminarily crushes the road surface to be processed and acts synchronously with the cutter head to improve the crushing effect.

[0020] 2. Through the setting of the cleaning component, the present invention moves the crushed raw materials to one side, facilitating later cleaning.

[0021] 3. Through the retractable design of the cutter head, the present invention can automatically rotate while squeezing and crushing, use the shearing force to assist in crushing the road surface, and through the setting of the elastic seat and the connecting pipe, the height of the cutter head can be automatically adjusted to adapt to the conditions of too long or too short cutter head and maintain a good crushing effect.

[0022] 4. Through the setting of the maintenance cover, the present invention can facilitate the replacement of the rotor and the cutter head. Description of the Drawings

[0023] Figure 1 It is an isometric structural schematic diagram of a milling machine for highway pavement maintenance projects.

[0024] Figure 2 It is a structural schematic diagram of the rotor in a milling machine for highway pavement maintenance projects.

[0025] Figure 3 It is a structural schematic diagram of the cleaning component in a milling machine for highway pavement maintenance projects.

[0026] Figure 4 It is a sectional structural schematic diagram of the maintenance cover in a milling machine for highway pavement maintenance projects.

[0027] Figure 5 It is a structural schematic diagram of the receiving seat in a milling machine for highway pavement maintenance projects.

[0028] Figure 6 It is a sectional structural schematic diagram of the crushing component in a milling machine for highway pavement maintenance projects.

[0029] In the figure: 1, frame; 2, drive wheel; 3, motor; 4, maintenance cover; 5, rotor; 6, cutter head; 7, crushing assembly; 8, cleaning assembly; 9, control area; 10, transmission box;

[0030] 11, intermediate gear; 12, drive shaft; 13, fixing bracket; 14, bearing disc; 15, guide post; 16, elastic seat; 17, connecting pipe; 18, receiving seat; 19, U-shaped clamping strip; 20, cover;

[0031] 21, knocking plate; 22, striking shaft; 23, receiving box. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 6 , in the embodiment of the present invention, a milling machine for highway pavement maintenance projects includes a frame 1. A drive wheel 2 and a handle are provided at the rear side of the frame 1. A control area 9 is installed on the handle. A motor 3 is installed on the upper side of the middle part of the frame 1. A rotor 5 is rotatably connected inside the frame 1. A plurality of cutter heads 6 are provided on the outer side of the rotor 5. A crushing assembly 7 is provided in front of the rotor 5. A cleaning assembly 8 is provided at the rear side of the rotor 5. Brush hairs are evenly provided on the outer edge of the lower side of the frame 1 to block gravel. The connecting rod of the drive wheel 2 is V-shaped and the front end is fixed to the lower side of the handle to support the frame 1. An inclined rod is fixed between the frame 1 and the handle to improve the connection strength. The motor 3 is connected to a vertical rotating shaft through a belt assembly. The lower end of the vertical rotating shaft is connected to a transmission box 10 through bevel gears. An intermediate gear 11 is rotatably connected inside the transmission box 10. Bevel gears on the lower side of the bevel gears respectively mesh with the bevel gear of the intermediate gear 11 and the bevel gear of the drive shaft 12. The drive shaft 12 is fixedly connected to the rotor 5. The intermediate gear 11 is connected to the crushing assembly 7 and the cleaning assembly 8 through two belts respectively;

[0034] On one side of the frame 1 facing the transmission box 10, there is a maintenance cover 4. One side of the maintenance cover 4 is connected to the frame 1 by a hinge, and the other side is fixed to the frame 1 by bolts. On the side of the maintenance cover 4 facing the rotor 5, there is a fixing frame 13. The fixing frame 13 is fixed to the frame 1 by bolts around it. In the middle of the fixing frame 13, there is a groove for accommodating the bearing disc 14. The bearing in the bearing disc 14 is connected to the drive shaft 12. On the side of the maintenance cover 4 facing the fixing frame 13, there is an anti-slip pad, which is pressed against the bearing disc 14 to help stabilize the bearing disc 14. The cutter head 6 is rotatably connected in the slot hole of the rotor 5. There is an annular notch at the waist of the cutter head 6, and the cutter head 6 is rotatably connected to the guide post 15 through an arc-shaped slot. There is a spring in the cutter head 6. The upper end of the spring is fixedly connected to the guide post 15, and the lower end of the spring can be clamped on the bump on the guide post 15. On the side of the guide post 15 away from the cutter head 6, there is an elastic seat 16. The elastic seats 16 are connected by a connecting pipe 17. The lower sides of the elastic seat 16 and the guide post 15 are both clamped in the receiving seat 18. The receiving seat 18 is slidably connected in the chute of the rotor 5, and a U-shaped clamping strip 19 is clamped on the upper side of the receiving seat 18. The U-shaped clamping strip 19 is clamped on the annular notch at the waist. The ends of the receiving seat 18 and the U-shaped clamping strip 19 are both fixed in the rotor 5 by a cover 20;

[0035] The cutter heads 6 are arranged in a staggered manner in the rotation direction of the rotor 5 and are arranged side by side in the axial direction of the rotor 5, so that the cutter heads 6 face the receiving seat 18. The elastic seat 16 is a spring airbag, which is composed of an outer spring and an inner airbag and can generate deformation. The end of the connecting pipe 17 is connected with a valve. The valve is located outside the receiving seat 18 and can adjust the elastic force of the elastic seat 16 at the initial stage. A guide groove is provided at the position of the receiving seat 18 facing the U-shaped clamping strip 19 to prevent the U-shaped clamping strip 19 from deflecting. A clamping strip is fixed to the lower side of the guide post 15, and the clamping strip is clamped on the receiving seat 18 to prevent the guide post 15 from rotating, and then drive the cutter head 6 to rotate through the thread. The frictional force between the guide post 15 and the cutter head 6 is less than the torsion force of the spring, so that under the action of the spring, the cutter head 6 rotates in the reverse direction along the guide post 15 and returns to its original state;

[0036] The striking shaft 22 inside the crushing assembly 7 is connected to the intermediate gear 11 by a belt. A number of cams are fixed on the striking shaft 22. The outer sides of the cams are rotatably connected in the through holes of the striking plate 21. The striking plate 21 is slidably connected up and down in the groove of the crushing assembly 7. The lower end of the striking plate 21 is pointed and is used to break the road surface. The striking plate 21 and the cutter head 6 at the rear reach the lowest point simultaneously in the advancing direction of the frame 1. The cutter head 6 mills upward, and the striking plate 21 strikes downward synchronously, facilitating the breaking of the road surface. The cleaning assembly 8 includes a horizontal spiral blade. A receiving box 23 is arranged above the spiral blade to guide the raw materials falling from above into the spiral blade. Through the rotation of the spiral blade, the raw materials are concentrated on one side of the frame 1, facilitating later cleaning. A brush is fixed on the upper side of one end of the receiving box 23 close to the rotor 5 to clean the outer sides of the rotor 5 and the cutter head 6.

[0037] The working principle of the present invention is as follows: When in use, the motor 3 is externally powered, and this device is controlled by the control keys in the control area 9. The motor 3 rotates, drives the bevel gear to rotate through the belt and the vertical rotating shaft, and then drives the meshing intermediate gear 11 and the drive shaft 12 to rotate. The drive shaft 12 drives the rotor 5 to rotate, and the cutter head 6 mills. The intermediate gear 11 drives the spiral blade and the striking shaft 22 to rotate respectively through two belts, for cleaning and crushing respectively.

[0038] During the milling process of the cutter head 6, the road surface is extruded. While breaking the road surface, the cutter head 6 is forced to press the spring, the guide post 15 and the elastic seat 16. The guide post 15 can only slide up and down due to the restriction of the clamping strip. Due to the restriction of the arc groove of the guide post 15, the cutter head 6 rotates. Both ends of the spring are clamped, causing local deformation. After the external force is removed, under the action of the spring, the cutter head 6 rotates in the reverse direction and returns to its original position.

[0039] When the airbag is squeezed, the internal air pressures of each part are kept consistent through the connecting pipe 17. If the milling depth of a local cutter head 6 is insufficient due to wear, that is, the force received is insufficient, the extrusion stroke of the elastic seat 16 is small. Then the gas nearby is introduced into this elastic seat 16, forcing the stroke of this elastic seat 16 to be smaller than that of other elastic seats 16, making the retraction distance of this cutter head 6 smaller than that of other cutter heads 6, and finally making the heights of the cutter heads 6 consistent, which has the function of automatically adjusting the height of the cutter head 6. On the contrary, when the cutter head 6 is too long, the adaptive adjustment is still effective.

[0040] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A milling machine for highway pavement maintenance projects, including a frame (1). A driving wheel (2) and a handle are provided at the rear side of the frame (1). A control area (9) is installed on the handle. The connecting rod of the driving wheel (2) is V-shaped and is fixed to the lower side of the handle at the front end. An inclined rod is fixed between the frame (1) and the handle. A motor (3) is installed on the upper side of the middle part of the frame (1). A rotor (5) is rotatably connected inside the frame (1). A number of cutter heads (6) are provided on the outer side of the rotor (5). It is characterized in that a crushing assembly (7) is provided in front of the rotor (5), and a cleaning assembly (8) is provided behind the rotor (5). The motor (3) is connected to a vertical rotating shaft through a belt assembly. The lower end of the vertical rotating shaft is connected to a transmission box (10) through bevel gears. An intermediate gear (11) is rotatably connected inside the transmission box (10). Bevel gears on the lower side of the bevel gears respectively mesh with the bevel gear of the intermediate gear (11) and the bevel gear of the drive shaft (12). The drive shaft (12) is fixedly connected to the rotor (5). The intermediate gear (11) is connected to the crushing assembly (7) and the cleaning assembly (8) respectively through two belts; a maintenance cover (4) is provided on one side of the frame (1) facing the transmission box (10). One side of the maintenance cover (4) is connected to the frame (1) through a hinge, and the other side is fixed to the frame (1) through bolts. A fixing frame (13) is provided on the side of the maintenance cover (4) facing the rotor (5). The fixing frame (13) is fixed to the frame (1) through bolts around it. A groove for accommodating a bearing disc (14) is provided in the middle of the fixing frame (13). The bearing inside the bearing disc (14) is connected to the drive shaft (12). The cutter head (6) is rotatably connected in the slot hole of the rotor (5). A ring-shaped notch is provided at the waist of the cutter head (6), and the cutter head (6) is rotatably connected to a guide post (15) through an arc-shaped groove. A spring is provided inside the cutter head (6). The upper end of the spring is fixedly connected to the guide post (15), and the lower end of the spring can be clamped on the convex point on the guide post (15). An elastic seat (16) is fixed to the side of the guide post (15) away from the cutter head (6). The elastic seats (16) are communicated through a connecting pipe (17). The lower sides of the elastic seats (16) and the guide posts (15) are both clamped inside a receiving seat (18). The receiving seat (18) is slidably connected in the chute of the rotor (5), and a U-shaped clamping strip (19) is clamped on the upper side of the receiving seat (18). The U-shaped clamping strip (19) is clamped on the ring-shaped notch at the waist. The ends of the receiving seat (18) and the U-shaped clamping strip (19) are both fixed inside the rotor (5) through a cover (20). The frictional force between the guide post (15) and the cutter head (6) is less than the torsion of the spring. The elastic seat (16) is a spring airbag, which is composed of an outer spring and an inner airbag; The striking shaft (22) inside the crushing assembly (7) is connected to the intermediate gear (11) by a belt. A number of cams are fixed on the striking shaft (22). The outer sides of the cams are rotatably connected inside the through holes of the striking plate (21). The striking plate (21) is slidably connected up and down in the slot of the crushing assembly (7). The cleaning assembly (8) includes a horizontal spiral blade, and a receiving box (23) is arranged above the spiral blade.

2. The milling machine for highway pavement maintenance project according to claim 1, characterized in that brush hairs are evenly arranged along the outer edge of the lower side of the frame (1).

3. The milling machine for highway pavement maintenance project according to claim 1, characterized in that an anti-slip pad is arranged on one side of the maintenance cover (4) facing the fixed frame (13), and the anti-slip pad is pressed against the bearing disc (14).

4. The milling machine for highway pavement maintenance project according to claim 1, characterized in that the cutter heads (6) are arranged staggeredly in the rotation direction of the rotor (5), and the cutter heads (6) are arranged side by side in the axial direction of the rotor (5).

5. The milling machine for highway pavement maintenance project according to claim 1, characterized in that a valve is connected to the end of the communicating pipe (17), and the valve is located outside the receiving seat (18).

6. The milling machine for highway pavement maintenance project according to claim 1, characterized in that a guide groove is arranged at the position of the receiving seat (18) facing the U-shaped clamping strip (19).

7. The milling machine for highway pavement maintenance project according to claim 1, characterized in that a clamping strip is fixed to the lower side of the guide post (15), and the clamping strip is clamped on the receiving seat (18).

8. The milling machine for highway pavement maintenance project according to claim 1, characterized in that the lower end of the striking plate (21) is pointed.

9. The milling machine for highway pavement maintenance project according to claim 1, characterized in that a brush is fixed to the upper side of one end of the receiving box (23) close to the rotor (5).

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