CN109137696B - A small concrete milling machine for construction machinery - Google Patents

Abstract

The invention relates to the technical field of construction machinery and equipment, and discloses a small concrete milling machine for construction machinery. The inner wall of the dust box and the dust box is fixedly installed with a partition, the front of the partition is movably sleeved with a rotating rod, the outer fixed sleeve of the rotating rod is connected with a transmission roller, and the outer fixed sleeve of the rotating rod is connected with the first drum on the front of the transmission roller. fan. The small concrete milling machine for construction machinery enables the movable rod to move left and right through the cooperation of the positioning plate, the electric push rod and the connecting block. Through the cooperation of the fixed column and the linkage plate, the movable rod can carry the first swing arm and The first swing arm swings left and right, thereby controlling the milling depth of the milling roller to the ground, reducing the load of the electric push rod, reducing the energy consumption, and improving the practicability of the small concrete milling machine for construction machinery.

Description

A small concrete milling machine for construction machinery

technical field

The invention relates to the technical field of construction machinery and equipment, in particular to a small concrete milling machine for construction machinery.

Background technique

Concrete milling machine is a construction equipment for asphalt concrete pavement maintenance. It is mainly used for the excavation and renovation of asphalt concrete surfaces such as highways, urban roads, airports, freight yards, etc. It can also be used to excavate pavement pits and grooves, as well as the roughening of cement pavement and the milling of surface staggered platforms.

However, the existing milling machine is usually a single-axis structure. When milling the road surface, the reaction force is large, the milling efficiency is low, the blade wears out quickly, it is inconvenient to adjust the milling depth, and the steering adjustment is difficult, resulting in labor intensity for workers. high.

In view of the above-mentioned problems, the existing publication number CN205529824U discloses a double-row milling machine. The mounting frame is pushed up and down by an electric push rod, which facilitates workers to adjust the depth of the milling machine on the road surface. Moving up and down on the wheel is convenient for workers to move the double-row milling machine. However, the double-row milling machine directly pushes the entire mounting frame to move up and down through the electric push rod. The electric push rod has a large load and needs to consume a lot of electric energy. Lifting up the mounting frame causes energy waste, and there is no dust removal device, which causes the dust generated by the double-row milling machine to fly everywhere when milling the road surface, polluting the environment and endangering the health of workers. Therefore, it is urgent to design an energy-saving device. And environmentally friendly small concrete milling machines for construction machinery.

SUMMARY OF THE INVENTION

The invention provides 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 whole mounting frame to move up and down through the electric push rod, and the load of the electric push rod is large. , it takes a lot of electric energy to lift the mounting frame, which causes energy waste, and there is no dust removal device, which causes the dust generated when the double-row milling machine is milling the road to fly everywhere, pollute the environment, and endanger the health of workers.

The present invention provides the following technical solutions: a small concrete milling machine for construction machinery, comprising a vehicle body, a support column is fixedly installed on the bottom surface of the inner cavity of the vehicle body, and a dust removal box is fixedly installed at the top of the support column, and the dust removal box is fixedly installed on the bottom surface of the vehicle body cavity. The inner wall of the box is fixedly installed with a partition, the front of the partition is movably sleeved with a rotating rod, the outside of the rotating rod is fixedly sleeved with a transmission roller, and the outside of the rotating rod is fixedly sleeved with a front of the transmission roller. For the first blowing fan, the front of the partition plate is movably sleeved with a rotating shaft located below the rotating rod, the outside of the rotating shaft is fixedly sleeved with a driven roller, and the outside of the rotating shaft is fixedly sleeved with a driven roller. The second blowing fan on the front side of the roller, the drive roller is connected to the driven roller through a drive belt, and a support plate is fixedly installed between the right side of the dust box and the right side of the inner cavity of the vehicle. The support plate A spacer block is fixedly installed on the top surface of the support plate, a drive motor is fixedly installed on the top surface of the spacer block, the output shaft of the drive motor is fixedly sleeved with a motor roller, and the bottom surface of the support plate is fixedly installed with a fixed plate, the The number of the fixed plates is two, the front of one of the fixed plates is movably sleeved with a first transmission shaft, the back of the first transmission shaft penetrates the fixed plate and extends to the outside of the fixed plate, and the first transmission shaft The external movable sleeve is connected with a first swing arm, the number of the first swing arms is two, and the two first swing arms are respectively located on the front and back sides of the fixed plate, and the external fixed sleeve of the first transmission shaft is connected There is a driving roller located on the front of one first swing arm, an active roller located on the back of the other first swing arm is fixedly sleeved on the outside of the first transmission shaft, and a movable sleeve is connected between the two first swing arms. a transmission rod, the two ends of the transmission rod respectively penetrate the two first swing arms and extend to the outside of the first swing arm, the outer part of the transmission rod is fixedly sleeved with a transfer roller located on the front of one of the first swing arms, The outer fixed sleeve of the transmission rod is connected with a passive roller located on the back of the other first swing arm. a transmission shaft, the back of the second transmission shaft penetrates through the fixed plate and extends to the outside of the fixed plate; the outer part of the second transmission shaft is movably sleeved with second swing arms located on both sides of the fixed plate; A rotating rod is movably sleeved between the second swing arms. The front of the rotating rod penetrates a second swing arm and is fixedly sleeved with a linkage roller. The outside of the rotating rod is movably sleeved with the second swing arm. The linkage roller is connected to the transfer roller through a linkage belt, the outside of the transmission rod and the outside of the rotating rod are fixedly sleeved with a milling roller, and the fronts of the first swing arm and the second swing arm are fixedly installed with fixed The two fixed columns are movably connected by a linkage plate, a positioning plate located on the right side of the pad is fixedly installed on the top surface of the support plate, and an electric push rod is fixedly installed on the right side of the positioning plate. A connecting block is fixedly installed on the right end of the electric push rod, and a movable rod is movably sleeved inside the connecting block, and the bottom end of the movable rod penetrates the support plate and is fixedly connected with the top surface of the linkage plate.

Preferably, the front of the partition is provided with a ventilation hole located above the rotating rod, the back of the partition is fixedly installed with a dust filter mesh that matches the ventilation hole, and the back of the partition is fixedly installed with a filter located below the dust filter. guide plate.

Preferably, a hydraulic cylinder is fixedly installed on the bottom surface of the dust removal box, a universal wheel is fixedly installed at the bottom end of the hydraulic cylinder, and a fixing groove adapted to the universal wheel is formed on the bottom surface of the vehicle body.

Preferably, an operating rod is fixedly installed on the top of the left side of the vehicle body, and a rubber sleeve is fixedly sleeved on the outside of the operating rod.

Preferably, the motor roller is connected to the transmission roller through a blowing belt, and the right side of the dust box is provided with a movable groove adapted to the blowing belt.

Preferably, the motor roller is connected to the drive roller through a drive belt, and the top surface of the support plate is provided with a fixing hole adapted to the drive belt.

Preferably, the number of the milling rollers is two, one of the milling rollers is located between the two first swing arms, and one of the milling rollers is located between the two second swing arms.

Preferably, the bottom surface of the vehicle body is provided with lifting holes that are compatible with both milling rollers, the top end of the movable rod is fixedly installed with a limit block, and the top surface of the support plate is provided with a corresponding movable rod. Fitted rectangular slot.

Preferably, a dust suction pipe is fixedly connected to the right side of the dust box, the other end of the dust pipe penetrates through the support plate and extends to the outside of the support plate, and the bottom surface of the inner cavity of the dust box is movably installed with a suction pipe located in the partition The dust collecting box on the back of the board, the bottom surface of the dust collecting box is fixedly installed with a roller, and the bottom surface of the inner cavity of the dust collecting box is fixedly installed with a concave track matched with the roller.

The present invention has the following beneficial effects:

1. The small concrete milling machine for construction machinery, through the cooperation of the positioning plate, the electric push rod and the connecting block, enables the movable rod to move left and right, and through the cooperation of the fixed column and the linkage plate, the movable rod can carry the first pendulum The arm and the first swing arm swing left and right, thereby controlling the milling depth of the milling roller to the ground, reducing the load of the electric push rod, reducing the energy consumption, and improving the practicality of the small concrete milling machine for construction machinery. sex.

2. The small concrete milling machine for construction machinery, through the cooperation of the driving motor, the motor roller, the blowing belt, the driving roller and the rotating rod, enables the first blowing fan to rotate quickly, and the first blowing fan can rotate quickly through the driving roller, the driven roller and the driving belt. With the cooperation of the second blower fan, the second blowing fan can rotate quickly, thereby speeding up the flow speed of the air inside the dust box. Inside, the problem of dust flying everywhere and polluting the environment is avoided, and the practicability of the small concrete milling machine for construction machinery is improved.

3. The small concrete milling machine for construction machinery passes through the dust filter, so that the dust entering the dust box will not fly out of the ventilation holes with the fast-flowing air, and pass through the guide plate, so that the filtered dust can accurately fall into the dust box. The inside of the dust collecting box enables workers to centrally process the dust inside the dust collecting box, which increases the environmental protection of the small concrete milling machine for construction machinery and improves the practicability of the small concrete milling machine for construction machinery.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the rear view internal structure schematic diagram of Fig. 1;

Fig. 3 is the front view of Fig. 1;

Fig. 4 is the left internal structure schematic diagram of Fig. 1;

FIG. 5 is a left side view of FIG. 1 .

In the figure: 1. Vehicle body; 2. Support column; 3. Dust box; 4. Partition; 5. Ventilation hole; 6. Rotating rod; 7. Transmission roller; 8. First blowing fan; 10. Driven roller; 11. Second blower fan; 12. Transmission belt; 13. Hydraulic cylinder; 14. Universal wheel; 15. Operating lever; 16. Rubber sleeve; 17. Support plate; , drive motor; 20, motor roller; 21, blast belt; 22, fixed plate; 23, first drive shaft; 24, first swing arm; 25, drive roller; 26, drive belt; 27, drive roller; 28 , transmission rod; 29, transfer roller; 30, passive roller; 31, driven belt; 32, second transmission shaft; 33, second swing arm; 34, rotating rod; 35, linkage roller; 36, linkage belt; 37, milling roller; 38, fixed column; 39, linkage plate; 40, positioning plate; 41, electric push rod; 42, limit block; 43, connecting block; 44, movable rod; 45, suction pipe; 46 , dust box.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, but not all of 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.

Please refer to Figures 1-5, a small concrete milling machine for construction machinery, including a car body 1, the front of the car body 1 is provided with an air outlet that is adapted to the dust box 3, and the left side of the car body 1 passes through The hinge is movably installed with an operation door matching the dust collecting box 46 , the bottom surface of the vehicle body 1 is provided with a lifting hole that is adapted to the two milling rollers 37 , and the top surface of the support plate 17 is provided with a movable rod 44 . The matching rectangular slot uses the lifting hole to make the milling roller 37 move up and down stably, and the rectangular slot enables the movable rod 44 to move stably left and right, which improves the practicality of the small concrete milling machine for construction machinery. The top of the left side of the vehicle body 1 is fixedly installed with an operating rod 15, and the outer part of the operating rod 15 is fixedly sleeved with a rubber cover 16. The cooperation of the operating rod 15 and the rubber cover 16 provides a handle for the worker, which is convenient for workers. The worker moves the small concrete milling machine for construction machinery, which improves the practicability of the small concrete milling machine for construction machinery. The bottom surface of the inner cavity of the vehicle body 1 is fixedly installed with a support column 2, and the top of the support column 2 is fixedly installed with a dust removal device. Box 3, the bottom surface of the dust box 3 is fixedly installed with a hydraulic cylinder 13, the bottom end of the hydraulic cylinder 13 is fixedly installed with a universal wheel 14, and the bottom surface of the vehicle body 1 is provided with a fixed groove adapted to the universal wheel 14. The cooperation of the cylinder 13 and the universal wheel 14 enables the worker to quickly turn around when moving the small concrete milling machine for construction machinery, which reduces the workload of the worker and improves the practicability of the small concrete milling machine for construction machinery. A partition 4 is fixedly installed on the inner wall of the dust box 3. The front of the partition 4 is provided with a ventilation hole 5 located above the rotating rod 6. The back of 4 is fixedly installed with a guide plate located under the dust filter, using the ventilation holes 5, so that the air inside the dust box 3 can flow quickly under the cooperation of the first blower fan 8 and the second blower fan 11, and the dust filter is used. The flying dust will not fly out from the ventilation hole 5, which improves the practicability of the small concrete milling machine for construction machinery. The transmission roller 7, the external fixed sleeve of the rotating rod 6 is connected with the first blowing fan 8 located in the front of the transmission roller 7, the front of the partition plate 4 is movably sleeved with the rotating shaft 9 located under the rotating rod 6, and the external of the rotating shaft 9 is fixed The driven roller 10 is sleeved, and the outside of the rotating shaft 9 is fixedly sleeved with a second blowing fan 11 located on the front of the driven roller 10. The transmission roller 7 is connected to the driven roller 10 through the transmission belt 12. The right side of the dust box 3 A support plate 17 is fixedly installed between the side surface and the right side of the inner cavity of the vehicle body 1 , a spacer block 18 is fixedly installed on the top surface of the support plate 17 , a drive motor 19 is fixedly installed on the top surface of the spacer block 18 , and the drive motor 19 The model is Y112M-2, the output shaft of the drive motor 19 is fixedly sleeved with the motor roller 20, the motor roller 20 is connected to the drive roller 25 through the drive belt 26, and the top surface of the support plate 17 is provided with the drive belt 26. The fixing hole of the motor roller 20 and the driving belt 26 are used , The cooperation of the driving roller 25 and the fixing hole enables the driving motor 19 to rotate with the first transmission shaft 23, thereby making the milling roller 37 rotate and milling the road surface, improving the performance of the small concrete milling machine for construction machinery. Practicality, the motor roller 20 is connected to the transmission roller 7 through the blast belt 21, and the right side of the dust box 3 is provided with a movable groove that is adapted to the blast belt 21. The motor roller 20, the blast belt 21 and the drive The cooperation of the rollers 7 enables the driving motor 19 to rotate rapidly with the first blowing fan 8, which speeds up the flow speed of the air inside the dust box 3, increases the dust removal effect of the small concrete milling machine for construction machinery, and improves the construction efficiency. The practicability of a small mechanical concrete milling machine, the bottom surface of the support plate 17 is fixedly installed with a fixed plate 22, the number of the fixed plate 22 is two, the front of one fixed plate 22 is movably sleeved with the first transmission shaft 23, the first The back of the transmission shaft 23 penetrates through the fixed plate 22 and extends to the outside of the fixed plate 22. The first swing arm 24 is movably sleeved on the outside of the first transmission shaft 23. The number of the first swing arms 24 is two, and the two first swing arms 24 The swing arms 24 are respectively located on the front and back sides of the fixed plate 22, the external fixed sleeve of the first transmission shaft 23 is connected with a driving roller 25 located on the front of one first swing arm 24, and the external fixed sleeve of the first transmission shaft 23 is connected with a drive roller 25 located on the other side. A driving roller 27 on the back of the first swing arm 24, a transmission rod 28 is movably sleeved between the two first swing arms 24, and the two ends of the transmission rod 28 respectively penetrate the two first swing arms 24 and extend to the first swing arm 24. Outside the arm 24, the outside of the transmission rod 28 is movably sleeved with the two first swing arms 24, and the outside of the transmission rod 28 is fixedly sleeved with a transfer roller 29 located on the front of one first swing arm 24. A passive roller 30 located on the back of the other first swing arm 24 is fixedly sleeved on the outside. The passive roller 30 is connected to the driving roller 27 through a driven belt 31 in a driving manner. The front of the other fixed plate 22 is movably sleeved with a second transmission shaft 32 , the back of the second transmission shaft 32 penetrates through the fixing plate 22 and extends to the outside of the fixing plate 22, the outer part of the second transmission shaft 32 is movably sleeved with the fixing plate 22, and the outer part of the second transmission shaft 32 is movably sleeved on the fixing plate 22 22 The second swing arm 33 on both sides of the front and back, a rotating rod 34 is movably sleeved between the two second swing arms 33, the front of the rotating rod 34 penetrates a second swing arm 33 and is fixedly sleeved with a linkage roller 35, which rotates The outside of the rod 34 is movably sleeved with the second swing arm 33, the linkage roller 35 is connected with the transfer roller 29 through the linkage belt 36, and the outside of the transmission rod 28 and the outside of the rotating rod 34 are fixedly sleeved with a milling roller 37, The number of the milling rollers 37 is two, one milling roller 37 is located between the two first swing arms 24 , and one milling roller 37 is located between the two second swing arms 33 , using the two milling rollers 37 , The speed of milling the road surface by the small concrete milling machine for construction machinery is increased, and the practicability of the small concrete milling machine for construction machinery is improved. The front surfaces of the first swing arm 24 and the second swing arm 33 are fixedly installed There is a fixed column 38, The two fixed columns 38 are movably connected by the linkage plate 39. The top surface of the support plate 17 is fixedly installed with a positioning plate 40 located on the right side of the cushion block 18. The right side of the positioning plate 40 is fixedly installed with an electric push rod 41. The electric push rod The right end of 41 is fixedly installed with a connecting block 43, the inner part of the connecting block 43 is movably sleeved with a movable rod 44, the top of the movable rod 44 is fixedly installed with a limit block 42, and the bottom end of the movable rod 44 penetrates the support plate 17 and is connected with the linkage plate 39. The top surface of the dust removal box 3 is fixedly connected, the right side of the dust removal box 3 is fixedly connected with a dust suction pipe 45, the other end of the dust suction pipe 45 penetrates the support plate 17 and extends to the outside of the support plate 17, and the bottom surface of the inner cavity of the dust removal box 3 is movably installed There is a dust collecting box 46 located on the back of the partition 4, the bottom surface of the dust collecting box 46 is fixedly installed with a roller, and the bottom surface of the inner cavity of the dust collecting box 3 is fixedly installed with a concave track that matches the roller. The friction between the dust collecting box 46 and the bottom surface of the inner cavity of the dust collecting box 3 is reduced, it is convenient for workers to pull out the dust collecting box 46 and clean the dust inside the dust collecting box 46, and the small concrete milling machine for construction machinery is improved. practicability.

When working, firstly turn on the driving motor 19, then the driving motor 19 rotates with the first transmission shaft 23 through the motor roller 20, the driving belt 26 and the driving roller 25, and then the first transmission shaft 23 passes through the driving roller 27, the driven belt 31, The passive roller 30 and the transmission rod 28 rotate with one milling roller 37, and then the transmission rod 28 rotates rapidly with another milling roller 37 through the transfer roller 29, the linkage belt 36, the linkage roller 35 and the rotating rod 34, and then drives The motor 19 rotates rapidly with the rotating rod 6 through the motor roller 20, the blowing belt 21 and the driving roller 7, and then the rotating rod 6 rotates rapidly with the first blowing fan 8, and then the driving roller 7 passes through the driving belt 12 and the driven roller 10. And the rotating shaft 9 rotates rapidly with the second blowing fan 11, and then the air under the support plate 17 quickly flows into the interior of the dust box 3 through the dust suction pipe 45, and then the electric push rod 41 is turned on, and then the electric push rod 41 passes through the connecting block 43. The movable rod 44 slowly moves to the left, and then the movable rod 44 swings to the left with the first swing arm 24 and the second swing arm 33 through the cooperation of the fixed column 38 and the linkage plate 39, and then the milling roller 37 mills the surface of the road surface. The depth reaches the specified requirement, and then pushes the small concrete milling machine for construction machinery to move to the right through the cooperation of the operating rod 15 and the rubber sleeve 16 and mills the road surface. The dust can enter the interior of the dust box 3 along with the fast-flowing air below the support plate 17 and be concentrated in the interior of the dust box 46 .

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

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

Claims (4)

1. A small concrete milling machine for construction machinery, comprising a vehicle body (1), characterized in that: a support column (2) is fixedly installed on the bottom surface of the inner cavity of the vehicle body (1), and the support column (2) ) is fixedly installed with a dust removal box (3), the inner wall of the dust removal box (3) is fixedly installed with a partition (4), and the front of the partition (4) is movably sleeved with a rotating rod (6), so A transmission roller (7) is fixedly sleeved on the outside of the rotating rod (6), and a first blowing fan (8) located on the front of the transmission roller (7) is fixedly sleeved on the outside of the rotating rod (6). A rotating shaft (9) located below the rotating rod (6) is movably sleeved on the front of the plate (4), and a driven roller (10) is fixedly sleeved on the outside of the rotating shaft (9). The rotating shaft (9) ) is fixedly sleeved with a second blower fan (11) located on the front of the driven roller (10). A support plate (17) is fixedly installed between the right side of the box (3) and the right side of the inner cavity of the vehicle body (1), and a spacer block (18) is fixedly installed on the top surface of the support plate (17). A drive motor (19) is fixedly installed on the top surface of the cushion block (18), the output shaft of the drive motor (19) is fixedly sleeved with a motor roller (20), and the bottom surface of the support plate (17) is fixedly installed There are fixed plates (22), the number of the fixed plates (22) is two, and a first transmission shaft (23) is movably sleeved on the front of the fixed plate (22), and the first transmission shaft (23) ) penetrates through the fixing plate (22) and extends to the outside of the fixing plate (22), and a first swing arm (24) is movably sleeved on the outside of the first transmission shaft (23), and the first swing arm ( 24) The number is two, the two first swing arms (24) are respectively located on the front and back sides of the fixed plate (22), and the external fixed sleeve of the first transmission shaft (23) is connected to a first swing arm (24). The driving roller (25) on the front of the swing arm (24), the outer fixed sleeve of the first transmission shaft (23) is connected with the driving roller (27) on the back of the other first swing arm (24). A transmission rod (28) is movably sleeved between the first swing arms (24), and both ends of the transmission rod (28) respectively penetrate the two first swing arms (24) and extend to the first swing arms (24) The outside of the transmission rod (28) is fixedly sleeved with a transfer roller (29) located on the front of one first swing arm (24), and the outer fixed sleeve of the transmission rod (28) is located in the other. The passive roller (30) on the back of the first swing arm (24), the passive roller (30) is connected to the driving roller (27) through the driven belt (31), and the front side of the other fixed plate (22) is movable A second transmission shaft (32) is sleeved, the back of the second transmission shaft (32) penetrates through the fixing plate (22) and extends to the outside of the fixing plate (22), and the outside of the second transmission shaft (32) The movable sleeve is connected with second swing arms (33) located on the front and back sides of the fixed plate (22). A rotating rod (34) is movably sleeved between the two swing arms (33), the front of the rotating rod (34) penetrates a second swing arm (33) and is fixedly sleeved with a linkage roller (35). The outer part of the rod (34) is movably sleeved with the second swing arm (33), the linkage roller (35) is connected to the transfer roller (29) through the linkage belt (36) in a driving manner, and the outer part of the transmission rod (28) A milling roller (37) is fixedly sleeved on the outside of the rotating rod (34) and the first swing arm (24) and the front surface of the second swing arm (33) is fixedly installed with a fixing column (38). Each of the fixing columns (38) is movably connected by a linkage plate (39), and a positioning plate (40) located on the right side of the cushion block (18) is fixedly installed on the top surface of the support plate (17). The positioning plate ( 40) An electric push rod (41) is fixedly installed on the right side of the electric push rod (41), a connection block (43) is fixedly installed at the right end of the electric push rod (41), and a movable rod is connected to the inner movable sleeve of the connection block (43). (44), the bottom end of the movable rod (44) penetrates through the support plate (17) and is fixedly connected with the top surface of the linkage plate (39). 2. A small concrete milling machine for construction machinery according to claim 1, characterized in that: the front side of the partition plate (4) is provided with a ventilation hole (5) located above the rotating rod (6), so A dust filter mesh adapted to the ventilation holes (5) is fixedly installed on the back of the partition plate (4), and a guide plate located below the dust filter mesh is fixedly installed on the back of the partition plate (4). 3 . The small concrete milling machine for construction machinery according to claim 1 , wherein a hydraulic cylinder ( 13 ) is fixedly installed on the bottom surface of the dust removal box ( 3 ). A universal wheel (14) is fixedly installed at the bottom end, and a fixing groove adapted to the universal wheel (14) is provided on the bottom surface of the vehicle body (1). 4. A small concrete milling machine for construction machinery according to claim 1, characterized in that: an operating rod (15) is fixedly installed on the top of the left side of the vehicle body (1), and the operating rod ( 15) is attached with a rubber sleeve (16).

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