CN115897353A - A concrete milling machine - Google Patents

Abstract

The invention discloses a concrete milling machine, which comprises a shell, wherein a wire groove is formed in the left side of the shell, a groove is formed in the top of the shell, which is close to the right side, a cover plate is movably connected to the inner cavity of the groove, a placing plate is arranged in the inner cavity of the shell, and a first groove is formed in the top of the placing plate, which is close to the left side.

Description

A concrete milling machine

technical field

The invention relates to the technical field of milling machines, in particular to a concrete milling machine.

Background technique

Concrete milling machine is one of the main types of asphalt pavement maintenance construction machinery. It is mainly used for the excavation and renovation of asphalt concrete surfaces such as highways, urban roads, airports, and freight yards. It can also be used to remove road congestion, oil waves, Defects such as texture and ruts can also be used to excavate pits and grooves on the road surface, as well as roughening of the cement road surface and milling of the surface layer.

The comparative document "CN109137697B" discloses a small concrete milling machine for construction machinery, which has the advantages of energy saving and environmental protection, and solves the problem that the double-row milling machine directly pushes the entire installation frame to move up and down through the electric push rod, and the load of the electric push rod The amount is very large, and it takes a lot of power to lift the mounting frame, resulting in waste of energy, and there is no dust removal device, which causes the dust generated when the double-row milling machine mills the road surface to fly everywhere, pollute the environment, and endanger the health of workers Problem, although the invention solves the load problem of the electric push rod through components such as the first swing arm and the second swing arm, the lifting height of the milling rotor of the milling machine is still controlled by the electric push rod, and the invention also contains The control method of the descending height of the electric push rod is not mentioned, so when the staff uses it, it may be impossible to judge the cutting height of the milling rotor. At the same time, as the height of the milling rotor continues to decrease, the pressure on the milling rotor also increases In the continuous rise, when the milling rotor is performing deep milling, there may be a knife breakage. If the knife breakage occurs, the high-speed rotation of the milling rotor will cause the blade to splash and cause damage to the surrounding staff.

Contents of the invention

In order to achieve the above object, the present invention provides the following technical solutions: a concrete milling machine, including a casing, a wire slot is opened on the left side of the casing, a slot is opened on the top of the casing near the right side, and the inner side of the slot is The cavity is movably connected with a cover plate, the inner cavity of the housing has a placement plate, the top of the placement plate is provided with a first groove near the left side, and the top of the placement plate is provided with a second groove near the right side. Two vertical bars are fixedly connected to the top of the placement plate near the left side, and the two vertical bars are arranged symmetrically front and back, and the top ends of the two vertical bars are fixedly connected to the top of the inner cavity of the housing, and the bottom of the placement plate Near the front and rear sides are fixedly connected with two left and right symmetrical fixed plates, there are two milling rotors at the bottom of the placement plate, and the two milling rotors are left and right symmetrical settings, and the inner cavities of the two milling rotors are both The first rotating shaft runs through and is fixedly connected with it. The outer sides of the two first rotating shafts are fixedly sleeved with sheaves close to the front and rear ends, and the outer sides of every two adjacent said sheaves are jointly sleeved with belts. , the outer sides of the two first rotating shafts are sleeved with transmission plates near the front and rear ends, and several of the transmission plates are hinged with adjacent fixed plates near the top, and every two adjacent transmission plates correspond to A linkage plate is jointly hinged on one side of the two linkage plates, and a horizontal plate is fixedly connected between the two linkage plates.

Preferably, there is a round tube near the left side of the inner cavity of the housing, openings are opened on the left and right sides of the round tube near the bottom end, and two hinge plates are fixedly connected near the bottom end on the left side of the round tube, And the two hinged plates are arranged symmetrically front and back, and two connecting pieces are fixedly connected to the right side of the round tube near the bottom end, and the two connecting pieces are arranged symmetrically front and back, between the two hinged plates A flipping block is jointly hinged, and a swinging rod is fixedly connected to the left side of the flipping block, and the left end of the swinging rod runs through the wire groove. The top part is fixedly connected with a reed, and the bottom of the reed is attached to the block. The top end of the round tube penetrates the shell and is fixedly connected with it. The inner cavity of the round tube has a telescopic rod, and the bottom end of the telescopic rod A number of umbrella-shaped circular plates are fixedly connected, and several of the umbrella-shaped circular plates are arranged linearly from top to bottom, and an arc-shaped block is hinged on the right side of the turning block, and the arc-shaped block and the clamping block are connected to the adjacent The umbrella-shaped circular plate is attached, and the bottom of the umbrella-shaped circular plate at the bottom is fixedly connected with a column. The lifting rod is fixedly connected with a handle at the top of the telescopic rod.

Preferably, the inner cavity of the second groove is fixedly connected with a T-shaped plate, and the T-shaped plate is provided with several rectangular slots, and several rectangular slots are arranged linearly from top to bottom, and several rectangular slots The inner cavity of the groove is slidably connected with a reciprocating block, the right side of the reciprocating block is fixedly connected with a trigger rod, the outer side of the trigger rod is sleeved with a circular plate, the front and rear sides of the circular plate are fixedly connected with welding plates, two The left side of the welding plate is fixedly connected to the T-shaped plate, and springs are sleeved on the outside of several trigger rods, the left end of the spring is fixedly connected with the reciprocating block, and the right end of the spring is fixedly connected with the circular plate.

Preferably, there are two travel switches on the right side of the T-shaped plate, and a C-shaped block is fixedly connected to the right sides of the two travel switches, and a connecting rod is fixedly connected to the right side of the C-shaped block, and the connection The right end of the rod is fixedly connected to the inner wall of the housing.

Preferably, a dust collection box is fixedly connected to the top of the inner cavity of the housing close to the right side, and the top of the dust collection box is provided with a discharge port, and the discharge port and the slot are arranged through each other, and the dust collection box A vacuum cleaner is installed in the inner cavity of the dust collection box, the front and rear sides of the dust collection box are plugged with suction pipes, the top of the placement plate is close to the front and rear sides, and there are suction ports, and the top of the placement plate is close to the front and rear sides. Both are fixedly connected with a dust collection frame, and the dust collection frame is located at the top of the suction port, the bottom ends of the two suction pipes are plugged into the adjacent dust collection frame, and the travel switch at the top is electrically connected to the top. A first cable is connected, and the top end of the first cable passes through the dust box and is electrically connected with the vacuum cleaner.

Preferably, a double-axis motor is installed near the right side of the bottom of the housing, transmission rods are installed on both sides of the front and rear of the double-axis motor, and mounting plates are sleeved on the outside of the two transmission rods, and the two The bottom of the mounting plate is fixedly connected to the bottom of the inner cavity of the casing, and the corresponding ends on the outside of the two transmission rods are fixedly sleeved with gears, and the bottom of the casing is provided with strip openings near the front and rear sides. There is an arc-shaped plate near the right side of the inner cavity of the shaped mouth, and several tooth blocks are fixedly connected to the right side of the arc-shaped plate, and several of the tooth blocks are arranged in an arc-shaped array, and the gear and the arc-shaped plate pass through several teeth The left side of the arc-shaped plate is fixedly connected with a crank, and the side of the crank away from the milling rotor is hinged with an adjustment plate, and the rear side of the adjustment plate is hinged with a slider near the left side. There are two limiting plates fixedly connected to the side, and the two limiting plates are arranged symmetrically front and rear, a limiting groove is opened on the limiting plate, and the slider is slidably connected with the inner cavity of the limiting groove. The right side of the adjustment plate and the left side of the crank are hinged with a translation block, the inner cavity of the strip mouth has a protective plate, and a chute is opened on the protective plate, and the two translation blocks slide with the inner cavity of the chute connect.

Preferably, the corresponding sides of the two cranks are hinged with fixing pieces, the bottoms of the two fixing pieces are fixedly connected to the bottom of the inner cavity of the casing, and the bottom of the travel switch at the bottom is electrically connected with a second A cable, the bottom end of the second cable is electrically connected to the biaxial motor, and a roller is installed at the bottom of the housing near the right side.

Compared with prior art, the beneficial effect of the present invention is:

1. The present invention cooperates with components such as circular tubes, hinged plates, connectors, handles, telescopic rods, umbrella-shaped circular plates, reeds, clamping blocks, flipping blocks, swinging rods, columns, lifting rods, and horizontal plates. , it can be realized that when the staff lifts the swing rod, the umbrella-shaped circular plate can drive the column to move downward. When the column moves downward, it can drive the two milling rotors to move downward, thereby controlling the cutting amount of the milling rotor and avoiding The situation where the staff cannot judge the cutting amount occurs;

2. The present invention can realize biaxial When the motor is started, the adjacent gears can be driven to rotate through the two transmission rods. The gears can drive the arc plate to swing by meshing with the tooth block. When milling, protection can be formed on the front and rear sides of the milling rotor to prevent the blade from breaking and splashing and causing injury to the staff.

Description of drawings

Fig. 1 is a front view of the structure of the present invention;

Fig. 2 is a rear view of the structure of the present invention;

Fig. 3 is a front view of the internal structure of the component shell of the present invention;

Fig. 4 is a top view of the internal structure of the component shell of the present invention;

Fig. 5 is a schematic diagram of the internal structure of the present invention;

Fig. 6 is an exploded view of the circular tube structure of the components of the present invention;

Fig. 7 is a structural schematic diagram of the component protection plate of the present invention;

Fig. 8 is a structural schematic diagram of the trigger lever of the component of the present invention.

Symbols in the figure: 1. Shell; 2. Cover plate; 3. Handle; 4. Telescopic rod; 5. Swing rod; 6. Dust collection box; 7. First cable; 8. Round pipe; , second cable; 11, dust collection frame; 12, vertical rod; 13, placement plate; 14, milling rotor; 15, limit plate; 16, slider; 17, adjustment plate; 18, transmission plate; 19, protection Plate; 20, linkage plate; 21, belt; 22, crank; 23, arc plate; 24, gear; 25, biaxial motor; 26, roller; 27, T-shaped plate; 28, horizontal plate; 29, fixed plate ; 30, mounting plate; 31, C-shaped block; 32, suction pipe; 33, connecting rod; 34, translation block; 39, reed; 40, block; 41, arc block; 42, column; 43, lifting rod; 44, transmission rod; 45, reciprocating block; 46, welding plate; 47, spring; 48, circular plate; 49 , trigger lever; 50, travel switch.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-4, the present invention provides a technical solution: a concrete milling machine, including a casing 1, a wire slot is opened on the left side of the casing 1, and a slot is opened on the top of the casing 1 near the right side, and the slotted inner The cavity is movably connected with a cover plate 2, and the inner cavity of the housing 1 has a placement plate 13. The top of the placement plate 13 is provided with a first groove near the left side, and the top of the placement plate 13 is provided with a second groove near the right side. The placement plate 13 The top is fixedly connected with two vertical rods 12 near the left side, and the two vertical rods 12 are arranged symmetrically front and rear, and the tops of the two vertical rods 12 are all fixedly connected to the top of the inner cavity of the housing 1, and the bottom of the placement plate 13 is close to the front and rear sides. Both sides are fixedly connected with two left and right symmetrical fixed plates 29, there are two milling rotors 14 at the bottom of the placement plate 13, and the two milling rotors 14 are left and right symmetrical settings, and the inner cavities of the two milling rotors 14 are provided with a second One rotating shaft, and fixedly connected with it, the outer sides of the two first rotating shafts near the front and rear ends are fixedly sleeved with sheaves, and the outer sides of every two adjacent sheaves are jointly sleeved with a belt 21, and the outer sides of the two first rotating shafts Drive plates 18 are sleeved near the front and rear ends, several drive plates 18 are hinged with adjacent fixed plates 29 near the top, and the corresponding sides of every two adjacent drive plates 18 are jointly hinged with a linkage plate 20. A horizontal plate 28 is fixedly connected between the two linkage plates 20. There is a round tube 8 near the left side of the inner cavity of the shell 1. There are openings on the left and right sides of the round tube 8 near the bottom. The left side of the round tube 8 is Two hinged plates 9 are fixedly connected near the bottom, and the two hinged plates 9 are arranged symmetrically front and back, and two connecting pieces 37 are fixedly connected to the right side of the round tube 8 near the bottom, and the two connecting pieces 37 are front and rear. Symmetrically arranged, an overturn block 36 is jointly hinged between the two hinge plates 9, a swing rod 5 is fixedly connected to the left side of the overturn block 36, the left end of the swing rod 5 runs through the wire groove, and a clamping block 40 is jointly hinged between the two connecting parts 37 A reed 39 is fixedly connected between the two connectors 37 near the top, and the bottom of the reed 39 is attached to the block 40. The top of the round tube 8 runs through the shell 1 and is fixedly connected to it. The inner cavity of the round tube 8 has Telescopic rod 4, and the bottom end of telescopic rod 4 is fixedly connected with some umbrella-shaped circular plates 38, and several umbrella-shaped circular plates 38 are linearly arranged successively from top to bottom, and the right side of flipping block 36 is hinged with arc-shaped block 41, arc-shaped Both the block 41 and the clamping block 40 are attached to the adjacent umbrella-shaped circular plate 38, and the bottom of the umbrella-shaped circular plate 38 at the bottom is fixedly connected with a column 42, and the bottom end of the column 42 runs through the placement plate 13 and is fixedly connected to the horizontal plate 28 At the center of the top, a lifting rod 43 is fixedly sleeved on the outside of the column 42, and a handle 3 is fixedly connected to the top of the telescopic rod 4.

When in use, when the worker needs to adjust the cutting amount of the two milling rotors 14, he can lift the swing lever 5, and when the swing lever 5 is subjected to an external force, it can drive the turning block 36 to turn over, and the turning block 36 passes through the umbrella The umbrella-shaped circular plate 38 fits together, which can drive the umbrella-shaped circular plate 38 to move downward. The position of the umbrella-shaped circular plate 38 can be limited by the clamping block 40, and the clamping block 40 can always be kept in line with the umbrella-shaped circular plate by the reed 39. Plate 38 is fit state, and when umbrella-shaped circular plate 38 moves downward, can drive column 42 to move downward, and column 42 can drive horizontal plate 28 to move downward, and horizontal plate 28 can drive linkage plate 20 to move downward, when When the linkage plate 20 moves downward, it can drive several transmission plates 18 to move downward, and several transmission plates 18 can drive the two milling rotors 14 to move downward, so as to realize the purpose of controlling the cutting amount of the milling rotor 14. When the position of 14 is restored, the staff can lift the swing rod 5 again, so that the arc block 41 and the umbrella-shaped circular plate 38 are in a disengaged state. At the same time, the handle 3 drives the telescopic rod 4 to move upwards, thereby realizing the position of the milling rotor 14 Recovery, when the column 42 moves downward, it can also drive the lifting rod 43 to move synchronously, and the lifting rod 43 can contact the adjacent reciprocating block 45 .

The inner cavity of the second groove is fixedly connected with a T-shaped plate 27, and a plurality of rectangular grooves are provided on the T-shaped plate 27, and the plurality of rectangular grooves are arranged linearly from top to bottom, and the inner cavities of the plurality of rectangular grooves are slidingly connected with reciprocating block 45, the right side of the reciprocating block 45 is fixedly connected with a trigger lever 49, and the outer side of the trigger lever 49 is sleeved with a circular plate 48; On the T-shaped plate 27, springs 47 are sleeved on the outside of several trigger levers 49, the left end of the spring 47 is fixedly connected with the reciprocating block 45, the right end of the spring 47 is fixedly connected with the circular plate 48, and there are two travel switches on the right side of the T-shaped plate 27 50, and the right side of the two travel switches 50 is fixedly connected with a C-shaped block 31, and the right side of the C-shaped block 31 is fixedly connected with a connecting rod 33, and the right end of the connecting rod 33 is fixedly connected on the inner wall of the housing 1.

When in use, when the elevating rod 43 is in contact with the reciprocating block 45, it can drive the reciprocating block 45 at the top to move to the right, and the reciprocating block 45 at the top can drive the adjacent trigger lever 49 to move to the right, and the trigger lever 49 can activate the travel switch 50 at the top. When the worker needs to increase the cutting amount of the milling rotor 14, the lifting rod 43 will continue to move downward, thereby driving the reciprocating block 45 at the bottom to move to the right. The reciprocating block 45 can drive the adjacent trigger lever 49 to move to the right, and activate the travel switch 50 located at the bottom, and the position reset of the reciprocating block 45 can be realized by the spring 47 .

A dust collection box 6 is fixedly connected to the top of the inner cavity of the shell 1 near the right side. The top of the dust collection box 6 is provided with a discharge port. The discharge port and the slot are arranged to communicate with each other. The front and rear sides of the dust collection box 6 are all plugged with suction pipes 32, the top of the placement plate 13 is provided with suction ports near the front and rear sides, and the top of the placement plate 13 is fixedly connected with dust collection frames 11 near the front and rear sides. And the dust collection frame 11 is located at the top of the suction port, the bottom ends of the two suction pipes 32 are plugged into the adjacent dust collection frame 11, and the top of the travel switch 50 at the top is electrically connected with the first cable 7. The top end of a cable 7 runs through the dust box 6 and is electrically connected with the vacuum cleaner.

When in use, when the travel switch 50 at the top is activated, it means that the cutting amount of the milling rotor 14 is slightly reduced. Vacuum cleaner, through two suction pipes 32, the dust produced by the milling rotor 14 during milling can be absorbed by the vacuum cleaner and stored in the inner cavity of the dust collection box 6. to clean up.

A biaxial motor 25 is installed near the right side of the bottom of the housing 1, and transmission rods 44 are installed on the front and rear sides of the biaxial motor 25, and the outsides of the two transmission rods 44 are sleeved with mounting plates 30, and the bottoms of the two mounting plates 30 are It is fixedly connected to the bottom of the inner cavity of the shell 1, and the corresponding ends of the two transmission rods 44 outside are fixedly sleeved with gears 24, and the bottom of the shell 1 is provided with strip-shaped openings near the front and rear sides, and the inner cavity of the strip-shaped mouth is close to There is an arc-shaped plate 23 on the right side, and several tooth blocks are fixedly connected to the right side of the arc-shaped plate 23, and some tooth blocks are arranged in an arc-shaped array. The gear 24 and the arc-shaped plate 23 are meshed by several tooth blocks. The side is fixedly connected with a crank 22, the side of the crank 22 away from the milling rotor 14 is hinged with an adjustment plate 17, the rear side of the adjustment plate 17 is hinged with a slider 16 near the left side, and the left side of the inner cavity of the housing 1 is fixedly connected with two limiters plate 15, and the two limit plates 15 are arranged symmetrically front and back, limit plate 15 is provided with a limit groove, the slider 16 is slidingly connected with the inner cavity of the limit groove, and the right side of the adjustment plate 17 and the left side of the crank 22 are all hinged Translation block 34 is arranged, and the inner cavity of bar-shaped mouth has protective plate 19, and is provided with chute on the protective plate 19, and two translation blocks 34 are all slidably connected with the inner cavity of chute, and the corresponding side of two cranks 22 is A fixing part 35 is hinged, and the bottoms of the two fixing parts 35 are fixedly connected to the bottom of the inner cavity of the housing 1, and the bottom of the travel switch 50 at the bottom is electrically connected to the second cable 10, and the bottom end of the second cable 10 is connected to the double-axis motor 25 For electrical connection, a roller 26 is installed at the bottom of the housing 1 near the right side.

In use, when the travel switch 50 at the bottom is activated, it means that the cutting amount of the milling rotor 14 is a deep drop, and at this time the travel switch 50 at the bottom starts the biaxial motor 25 through the second cable 10, and the biaxial The motor 25 can start the two gears 24 through the transmission rod 44. When the gear 24 rotates, it can drive the arc plate 23 to swing by meshing with some tooth blocks. The arc plate 23 can drive the crank 22 to swing, and the crank 22 can drive the swing. The adjustment plate 17 swings, and the movable track of the adjustment plate 17 and the crank 22 can be limited by the slider 16. When the adjustment plate 17 and the crank 22 swing, the adjacent translation block 34 can drive the protective plate 19 downward. move, thereby realizing the purpose of protecting the front and rear sides of the milling rotor 14, avoiding the blade breakage and splashing when the milling rotor 14 is milling, and protecting the staff.

Working principle: When the staff needs to adjust the cutting amount of the two milling rotors 14, they can lift the swing lever 5, and when the swing lever 5 is subjected to external force, it can drive the turning block 36 to turn over, and the turning block 36 passes through the umbrella-shaped The circular plate 38 fits together, which can drive the umbrella-shaped circular plate 38 to move downward. The position of the umbrella-shaped circular plate 38 can be limited by the clamping block 40, and the clamping block 40 can always be kept in contact with the umbrella-shaped circular plate by the reed 39. 38 is in a fit state. When the umbrella-shaped circular plate 38 moves downward, it can drive the column 42 to move downward. The column 42 can drive the horizontal plate 28 to move downward. The horizontal plate 28 can drive the linkage plate 20 to move downward. When the linkage When the plate 20 moves downward, it can drive several transmission plates 18 to move downward, and several transmission plates 18 can drive two milling rotors 14 to move downward, thereby realizing the purpose of controlling the cutting amount of the milling rotor 14. When it is necessary to move the milling rotor 14 When the position is restored, the staff can lift the swing rod 5 again, so that the arc block 41 and the umbrella-shaped circular plate 38 are separated, and at the same time, the handle 3 drives the telescopic rod 4 to move upward, thereby realizing the position restoration of the milling rotor 14 When the column 42 moves downward, it can also drive the lifting rod 43 to move synchronously. The lifting rod 43 can be in contact with the adjacent reciprocating block 45. When the lifting rod 43 is in contact with the reciprocating block 45, it can drive the reciprocating block 45 at the top. The right side moves, and the reciprocating block 45 at the top can drive the adjacent trigger lever 49 to move to the right, and the trigger lever 49 can activate the travel switch 50 at the top. When the staff needs to increase the cutting amount of the milling rotor 14, Then the lifting rod 43 will continue to move downward, thereby driving the reciprocating block 45 at the bottom to move to the right, and the reciprocating block 45 at the bottom can drive the adjacent trigger lever 49 to move to the right, and activate the travel switch at the bottom 50, the position of the reciprocating block 45 can be reset by the spring 47. When the travel switch 50 at the top is activated, it means that the cutting amount of the milling rotor 14 is slightly reduced. At this time, the travel switch 50 at the top passes through the first cable 7. The vacuum cleaner in the inner chamber of the dust collection box 6 can be started. The dust collector can absorb the dust generated during the milling of the milling rotor 14 through two suction pipes 32, and store it in the inner cavity of the dust collection box 6. The staff can open the cover The plate 2 cleans the inner cavity of the dust collection box 6. When the limit switch 50 at the bottom is activated, it means that the cutting amount of the milling rotor 14 is a deep drop. At this time, the limit switch 50 at the bottom passes through the second cable 10 Start the biaxial motor 25, the biaxial motor 25 can start two gears 24 through the transmission rod 44, and when the gear 24 rotates, it can drive the arc plate 23 to swing by meshing with a number of tooth blocks, and the arc plate 23 can drive the crank 22 Swing, the crank 22 can drive the adjustment plate 17 to swing when the crank 22 swings, the movement track of the adjustment plate 17 and the crank 22 can be limited by the slider 16, when the adjustment plate 17 and the crank 22 swing, through the adjacent translation The block 34 can drive the protective plate 19 to move downwards, thereby realizing the purpose of protecting the front and rear sides of the milling rotor 14, preventing the blade from breaking and splashing when the milling rotor 14 is milling, and protecting the staff.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. A concrete milling machine, includes shell (1), its characterized in that: the wire casing is arranged on the left side of the shell (1), a groove is formed in the position, close to the right side, of the top of the shell (1), the inner cavity of the groove is movably connected with the cover plate (2), the inner cavity of the shell (1) is provided with a placing plate (13), a first groove is formed in the position, close to the left side, of the top of the placing plate (13), a second groove is formed in the position, close to the right side, of the top of the placing plate (13), two vertical rods (12) are fixedly connected to the position, close to the left side, of the top of the placing plate (13), the two vertical rods (12) are symmetrically arranged in the front-back direction, the top ends of the two vertical rods (12) are fixedly connected to the top of the inner cavity of the shell (1), two fixing plates (29) symmetrically arranged in the left-right direction are fixedly connected to the positions, close to the front side and the back side, of the bottom of the placing plate (13), two milling rotors (14) are arranged at the bottom of the placing plate (13) in a bilateral symmetry mode, first rotating shafts are arranged in the inner cavities of the two milling rotors (14) in a penetrating mode and fixedly connected with the first rotating shafts, grooved wheels are fixedly sleeved at the positions, close to the front end and the rear end, of the outer sides of the two first rotating shafts, belts (21) are sleeved on the outer sides of every two adjacent grooved wheels, transmission plates (18) are sleeved at the positions, close to the front end and the rear end, of the outer sides of the two first rotating shafts, the transmission plates (18) are hinged with adjacent fixing plates (29), one side, corresponding to each two adjacent transmission plates (18), is hinged with a linkage plate (20) together, a transverse plate (28) is fixedly connected between the two linkage plates (20).

2. The concrete milling machine of claim 1, wherein: the inner cavity of the shell (1) is close to the left side and is provided with a round pipe (8), the left side and the right side of the round pipe (8) are close to the bottom and are provided with openings, the left side of the round pipe (8) is close to the bottom and is provided with two hinged plates (9), the hinged plates (9) are symmetrically arranged front and back, the right side of the round pipe (8) is close to the bottom and is provided with two connecting pieces (37), the connecting pieces (37) are symmetrically arranged front and back, two hinged with a turning block (36) between the hinged plates (9), the left side of the turning block (36) is fixedly connected with a swinging rod (5), the left end of the swinging rod (5) penetrates through a wire casing, two connecting pieces (37) are hinged with a fixture block (40) between the connecting pieces (37), two connecting pieces (37) are fixedly connected with a reed (39) at the top and are jointed with the fixture block (40), the top end of the round pipe (8) penetrates through the shell (1) and is fixedly connected with the fixture block (40), the inner cavity of the round pipe (8) is provided with a telescopic rod (4), the bottom of the telescopic rod (4) is fixedly connected with a plurality of umbrella-shaped circular plate (38), the umbrella-shaped blocks (38) and is hinged with the arc-shaped block (41) at the right side and is arranged on the arc-shaped block (41), be located the bottom umbrella-type plectane (38) bottom fixedly connected with stand (42), stand (42) bottom is run through and is placed board (13) to fixed connection is in diaphragm (28) top center department, the fixed lifting rod (43) that has cup jointed in the stand (42) outside, telescopic link (4) top fixedly connected with handle (3).

3. The concrete milling machine of claim 2, wherein: inner chamber fixedly connected with T shaped plate (27) of second recess, a plurality of rectangular channels have been seted up on T shaped plate (27), and a plurality of the rectangular channel is from last to being linear arrangement down in proper order, and is a plurality of the equal sliding connection in inner chamber of rectangular channel has reciprocating block (45), reciprocating block (45) right side fixedly connected with trigger bar (49), plectane (48) have been cup jointed in the trigger bar (49) outside, plectane (48) front and back both sides equal fixedly connected with welded plate (46), two the equal fixed connection in welded plate (46) left side is on T shaped plate (27), and is a plurality of spring (47) have all been cup jointed in the trigger bar (49) outside, spring (47) left end and reciprocating block (45) fixed connection, spring (47) right-hand member and plectane (48) fixed connection.

4. The concrete milling machine of claim 3, wherein: there are two travel switch (50) on T shaped plate (27) right side, and two travel switch (50) right side common fixedly connected with C shape piece (31), just C shape piece (31) right side fixedly connected with connecting rod (33), connecting rod (33) right-hand member fixed connection is on shell (1) inside wall.

5. The concrete milling machine of claim 4, wherein: the dust collector is characterized in that the top of an inner cavity of the shell (1) is close to the right side and fixedly connected with the dust collection box (6), a discharge port is formed in the top of the dust collection box (6), the discharge port and the groove are arranged in a communicated mode, a dust collector is installed in the inner cavity of the dust collection box (6), air suction pipes (32) are inserted into the front side and the rear side of the dust collection box (6), air suction ports are formed in the top of the placing plate (13) close to the front side and the rear side and are arranged on the front side and the rear side, the dust collection frame (11) is located at the top of the air suction ports, the bottom of each air suction pipe (32) is inserted into the adjacent dust collection frame (11), a first cable (7) is electrically connected to the top of a travel switch (50) located at the top, and the dust collection box (6) is connected to the dust collector in an electric mode, and the top of the first cable (7) is connected to the dust collector.

6. The concrete milling machine of claim 5, wherein: the utility model discloses a gear, including shell (1), drive rod (44), mounting panel (30) have all been cup jointed in the drive rod (44) outside, and two the equal fixed connection in mounting panel (30) bottom is located shell (1) inner chamber bottom, two drive rod (44) corresponding one end in the outside is all fixed and has been cup jointed gear (24) around being close to drive rod (44) outside, shell (1) bottom is close to both sides department and has all seted up the bar mouth, the inner chamber of bar mouth is close to right side department and has arc (23), a plurality of tooth pieces of arc (23) right side fixedly connected with, and a plurality of the tooth piece is arc array setting, gear (24) and arc (23) are through a plurality of tooth piece meshing, arc (23) left side fixedly connected with crank (22), crank (22) keep away from one side of milling rotor (14) and articulate regulating plate (17), regulating plate (17) rear side is close to left side department and articulates there is slider (16), shell (1) inner chamber left side fixedly connected with two limiting plates (15), and two limiting plates (15) set up for the symmetry limiting plate (15), limiting plate (16) and limiting groove (34) are articulated limiting plate (17) and limiting groove (16), the inner chamber of bar mouth has guard plate (19), the spout has been seted up on guard plate (19), two translation piece (34) all with the inner chamber sliding connection of spout.

7. The concrete milling machine of claim 6, wherein: two corresponding one side of crank (22) all articulates there is mounting (35), two equal fixed connection in mounting (35) bottom is located shell (1) inner chamber bottom, is located the bottom travel switch (50) bottom electric connection has second cable (10), second cable (10) bottom and double-shaft motor (25) electric connection, shell (1) bottom is close to right side department and installs gyro wheel (26).

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