Sand-dust-proof cab of excavator

Abstract

The invention relates to the technical field of cabs, and discloses an excavator sand and dust prevention cab which comprises a driving mechanism, a sealing mechanism is movably connected to the side face of the driving mechanism, a filtering mechanism is installed on the upper surface of the driving mechanism, and a dust guiding mechanism is installed at the bottom of an inner cavity of the driving mechanism. A dust suction mechanism is installed in the center of an inner cavity of the dust guide mechanism, and a rotating mechanism is installed on the side face of the inner wall of the dust guide mechanism. Sand dust is adsorbed to a partition plate from the surface of a dust guide groove through an electrostatic adsorption plate, the sand dust is blown to the position above a dust collection round hole through wind power of a fan, meanwhile, a dust collection draught fan on the periphery of a mounting ring drives surrounding air to flow to blow the sand dust to a gravity sensing plate, and after a certain gravity is sensed, the dust is sucked to the dust collection round hole. A servo motor drives a motor shaft to rotate, a first gear on the motor shaft rotates to drive a second gear of a rotating column to rotate, so that the rotating column is driven to rotate, the rotating column drives a collecting plate to rotate and open, and sand and dust are discharged from a dust guide mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of cabs, and more particularly to a sand and dust proof cab for an excavator. Background Art

[0002] When ordinary excavators work in a dusty environment, dust can easily enter the cab, and inhaling dust will seriously damage the health of the driver. The excavator's dust-proof cab is a type of cab that is specially designed for excavators operating in dusty environments. It is usually improved on the basis of an ordinary excavator cab, and a series of dust-proof devices and structures are added to effectively prevent dust from entering. The dust-proof structure usually has sealing strips, filters and adsorbents, etc. When facing dust, the design of these mechanisms is crucial to the anti-dust capability.

[0003] The existing cab cannot effectively prevent sand and dust. The structural design of the sealing strip is relatively simple. Sand and dust can easily enter the cab through the gaps next to the sealing strip. The driver's health will be seriously damaged by inhaling sand and dust. In addition, there is a lack of dust-guiding device in the cab. When sand and dust enter the cab, it cannot be adsorbed and discharged in time. It accumulates in the cab for a long time. When there is a slight wind, it is easy to fly in the air and be inhaled into the driver's body, posing a great hidden danger to the driver's health. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a sand and dust proof cab for an excavator to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an excavator anti-sand and dust cab, comprising a driving mechanism, a sealing mechanism movably connected to the side of the driving mechanism, a filtering mechanism installed on the upper surface of the driving mechanism, a dust guide mechanism installed at the bottom of the inner cavity of the driving mechanism, a dust suction mechanism installed in the center of the inner cavity of the dust guide mechanism, and a rotating mechanism installed on the inner wall side of the dust guide mechanism.

[0006] The driving mechanism includes a driving shell, a hinge is installed on the side of the driving shell, a door is movably connected to the side of the hinge, a rear window is opened on the side of the driving shell, and a window glass is set on the rear window, a fuel tank is fixedly installed on the side of the driving shell, a pedal is movably connected to the bottom of the inner cavity of the driving shell, a steering rod is movably connected to the bottom of the inner cavity of the driving shell, a seat is fixedly installed on the bottom of the inner cavity of the driving shell, and the seat is located at the center of the rear side of the bottom of the inner cavity of the driving shell.

[0007] The dust-guiding mechanism includes a dust-guiding shell fixedly mounted on the lower surface of the inner cavity of the driving mechanism, a dust-guiding groove is provided on the upper surface of the dust-guiding shell, a dust-guiding column is fixedly connected to the lower surface of the dust-guiding shell, and the dust-guiding columns are equidistantly distributed on the lower surface of the dust-guiding shell, a partition is fixedly mounted on the inner wall side of the dust-guiding shell, an electrostatic adsorption plate is fixedly mounted on the upper surface of the partition, a fan is fixedly mounted on the side of the dust-guiding shell, and the fans are all on the same horizontal line and are located above the partition, the lower part of the inner cavity of the dust-guiding shell is movably connected to a collecting plate, and a gravity sensing plate is fixedly mounted on the upper surface of the collecting plate.

[0008] Beneficial effects of the present invention: 1. The present invention absorbs dust from the dust guide holes on the surface of the dust guide groove to the partition plate through the electrostatic adsorption plate, and uses the wind force of the fan to blow the dust to the top of the dust suction circular hole. At the same time, a dust suction fan installed around the circle drives the surrounding air to flow and blows the dust to the gravity sensing plate. When the gravity sensing plate senses a certain gravity, the servo motor drives the motor shaft to rotate, and the rotation of the first gear on the motor shaft drives the second gear on the rotating column to rotate, thereby driving the rotating column to rotate. The rotating column is connected to the collecting plate through the connecting block. The rotating column drives the collecting plate to rotate, so that the collecting plate opens and the sand and dust are discharged from the dust guide mechanism, which is beneficial to the prevention of sand and dust in the cab.

[0009] 2. The present invention is provided with a stepped sealing mechanism, in which the area of ​​the first sealing strip is larger than that of the second sealing strip, and the area of ​​the second sealing strip is larger than that of the third sealing strip, so that the sealing mechanism presents a stepped shape, and the first supporting block connecting the first sealing strip and the second sealing strip is a hollow structure, and the second supporting block connecting the second sealing strip and the third sealing strip is a hollow structure, which is conducive to the sealing mechanism being able to better fit the door gap when closing the door, thereby improving the anti-dust ability of the cab. At the same time, a memory alloy wire is provided in the hollow interior of the first supporting block connecting the first sealing strip and the second sealing strip. The deformation ability of the memory alloy wire is conducive to the sealing mechanism being able to deform back to its original shape when the car door is opened, thereby improving the service life of the sealing mechanism.

[0010] 3. The present invention uses the filter in the filter tank. When the car door is closed, the filter filters sand, dust and tiny particles in the air, providing clean air for the driver in the cab, which is beneficial to protecting the driver's health. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the sealing mechanism of the present invention; Figure 4Schematic diagram of the cross-sectional structure of the sealing mechanism of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the dust guide mechanism of the present invention; Figure 6 Schematic diagram of a first top view and cross-section of the dust guide mechanism of the present invention; Figure 7 It is a schematic side sectional structural diagram of the dust guide mechanism of the present invention; Figure 8 is a second top cross-sectional structural schematic diagram of the dust guide mechanism of the present invention; Figure 9 It is a schematic cross-sectional structural diagram of the transmission mechanism of the present invention.

[0012] The accompanying drawings are marked as follows: 1. driving mechanism; 11. driving housing; 12. door; 121. first window; 122. second window; 123. handle; 13. hinge; 14. rear window; 15. fuel tank; 151. fuel inlet; 16. pedal; 17. steering column; 18. seat; 2. sealing mechanism; 21. first sealing strip; 22. second sealing strip; 23. third sealing strip; 24. second support block; 25. first support block; 26. memory alloy wire; 3. filtering mechanism; 31. filter tank; 32. Filter; 4. Dust guide mechanism; 41. Dust guide shell; 42. Dust guide groove; 421. Dust guide hole; 43. Fan; 44. Partition; 45. Electrostatic adsorption plate; 46. Dust guide column; 47. Collection plate; 48. Gravity sensor plate; 5. Dust suction mechanism; 51. Connecting plate; 52. Dust suction hole; 53. Mounting ring; 54. Mounting block; 55. Dust suction fan; 6. Rotating mechanism; 61. Rotating column; 611. Second gear; 612. Connecting block; 62. Servo motor; 63. Motor shaft; 631. First gear. DETAILED DESCRIPTION

[0013] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described below, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0014] See also Figure 1 、 Figure 6 and Figure 7A dust-proof cab for an excavator includes a driving mechanism 1, a sealing mechanism 2 movably connected to the side of the driving mechanism 1, a filtering mechanism 3 installed on the upper surface of the driving mechanism 1, a dust guide mechanism 4 installed at the bottom of the inner cavity of the driving mechanism 1, a dust suction mechanism 5 installed in the center of the inner cavity of the dust guide mechanism 4, and a rotating mechanism 6 installed on the inner wall side of the dust guide mechanism 4.

[0015] See also Figure 1 and Figure 2 The driving mechanism 1 includes a driving shell 11, a hinge 13 is installed on the side of the driving shell 11, and a door 12 is movably connected to the side of the hinge 13. A rear window 14 is opened on the side of the driving shell 11, and a window glass is set on the rear window 14. A fuel tank 15 is fixedly installed on the side of the driving shell 11, a pedal 16 is movably connected to the bottom of the inner cavity of the driving shell 11, and a steering rod 17 is movably connected to the bottom of the inner cavity of the driving shell 11. A seat 18 is fixedly installed on the bottom of the inner cavity of the driving shell 11, and the seat 18 is located at the center of the rear side of the bottom of the inner cavity of the driving shell 11.

[0016] By pulling the handle 123 on the side of the driving shell 11, the door 12 is opened by rotating the hinge 13, and the driver enters the cab. A seat 18 is provided inside the driving shell 11, and the driver sits on the seat 18. After closing the door 12, the driver operates the pedals 16 and the driving lever 17 to control the movement of the excavator.

[0017] See also Figure 5 、 Figure 6 and Figure 7 The dust-guiding mechanism 4 includes a dust-guiding shell 41 fixedly mounted on the lower surface of the inner cavity of the driving mechanism 1, a dust-guiding groove 42 is provided on the upper surface of the dust-guiding shell 41, and a dust-guiding column 46 is fixedly connected to the lower surface of the dust-guiding shell 41. The dust-guiding columns 46 are equidistantly distributed on the lower surface of the dust-guiding shell 41, and a partition 44 is fixedly mounted on the inner wall side of the dust-guiding shell 41. An electrostatic adsorption plate 45 is fixedly mounted on the upper surface of the partition 44. A fan 43 is fixedly mounted on the side of the dust-guiding shell 41. The fans 43 are all on the same horizontal line and are located above the partition 44. The lower part of the inner cavity of the dust-guiding shell 41 is movably connected to a collecting plate 47, and a gravity sensing plate 48 is fixedly mounted on the upper surface of the collecting plate 47.

[0018] The electrostatic adsorption plate 45 adsorbs the dust and sand, and adsorbs the dust and sand from the dust guide hole 421 on the surface of the dust guide groove 42 to the partition 44. The wind force of the fan 43 is used to blow the dust and sand to the top of the dust suction hole 52. At the same time, the dust suction fan 55 installed around the circle 53 drives the surrounding air flow to blow the dust and sand and dust to the gravity sensing plate 48. When the gravity sensing plate 48 senses a certain gravity, the rotating mechanism 6 starts to move.

[0019] See also Figure 3 and Figure 4The sealing mechanism 2 includes a first sealing strip 21 fixedly connected to the side of the vehicle door 12, and a first supporting block 25 is fixedly connected to the upper surface of the first sealing strip 21. The interior of the first supporting block 25 is a hollow structure. The upper surface of the first supporting block 25 is fixedly connected to the second sealing strip 22, and the upper surface of the second sealing strip 22 is fixedly connected to the second supporting block 24. The interior of the second supporting block 24 is a hollow structure, and the upper surface of the second supporting block 24 is fixedly connected to the third sealing strip 23.

[0020] The area of ​​the first sealing strip 21 of the sealing mechanism 2 is larger than that of the second sealing strip 22, and the area of ​​the second sealing strip 22 is larger than that of the third sealing strip 23, so that the sealing mechanism 2 presents a stepped shape, and the first supporting block 25 connecting the first sealing strip 21 and the second sealing strip 22 is a hollow structure, and the second supporting block 24 connecting the second sealing strip 22 and the third sealing strip 23 is a hollow structure. The first supporting block 25 and the second supporting block 24 can be deformed, and when squeezed against the frame of the vehicle door 12, the sealing mechanism 2 can better fit the door gap.

[0021] See also Figure 1 The filtering mechanism 3 includes a filter tank 31 opened on the upper surface of the driving shell 11, and a filter plate 32 is installed on the upper surface of the filter tank 31. The filter plate 32 is rectangular in shape, and fine holes are equidistantly opened on the surface of the filter plate 32.

[0022] The filter 32 in the filter slot 31 filters sand, dust and tiny particles in the air. When the vehicle door 12 is closed, air enters the cab through the filter 32 , and the sand, dust and tiny particles in the air are adsorbed by the filter 32 .

[0023] See also Figure 6 and Figure 7 The dust collection mechanism 5 includes a connecting piece 51 fixedly connected to the center of the upper surface of the partition 44, a dust collection circular hole 52 is opened in the center of the connecting piece 51, a mounting ring 53 surrounding the dust collection circular hole 52 is fixedly connected to the side of the connecting piece 51, and a mounting block 54 is fixedly installed on the side of the mounting ring 53. The mounting blocks 54 are equidistantly distributed on the side of the mounting ring 53, and a dust collection fan 55 is fixedly installed on the side of the mounting block 54.

[0024] The mounting block 54 is provided with an arc-shaped groove and a mounting hole on the side of the mounting block 54 through the mounting ring 53, so that the dust suction fan 55 is stably fixed on the mounting block 54. The dust suction fan 55 surrounding the mounting ring 53 drives the air flow around the dust suction hole 52, and the air flow drives the sand and dust to move downward and fall onto the gravity sensing plate 48 below.

[0025] See also Figure 7 、 Figure 8 and Figure 9The rotating mechanism 6 includes a servo motor 62 fixedly mounted below the inner wall side of the dust guide shell 41. A motor shaft 63 is movably connected to the center of the upper surface of the servo motor 62. The motor shaft 63 is transmission-connected to the rotating column 61 through gear engagement. The rotating column 61 is movably connected to the lower side of the inner wall of the dust guide shell 41. The rotating column 61 is rotatably connected to the dust guide shell 41 through a bearing.

[0026] Through the rotation connection of the bearing, the rotating column 61 can rotate freely relative to the dust guide shell 41, ensuring the smooth rotation process. The rotating column 61 drives the collecting plate 47 to rotate, so that the collecting plate 47 forms a ninety-degree angle relative to the dust guide shell 41, so that the dust is discharged downward along the collecting plate 47.

[0027] See also Figure 8 and Figure 9 The side of the motor shaft 63 is fixedly connected to the first gear 631, and the side of the rotating column 61 is fixedly connected to the second gear 611. The teeth of the second gear 611 are engaged with the teeth of the first gear 631. The rotating column 61 is connected to the motor shaft 63 through the engagement of the teeth of the second gear 611 and the first gear 631. The side of the rotating column 61 is fixedly connected to the connecting block 612, and the connecting block 612 is fixedly connected to the collecting plate 47 by screws.

[0028] The motor shaft 63 is driven to rotate by the servo motor 62, and the first gear 631 on the motor shaft 63 rotates to drive the second gear 611 on the rotating column 61 to rotate, thereby driving the rotating column 61 to rotate. The rotating column 61 is connected to the collecting plate 47 through the connecting block 612. The rotating column 61 drives the collecting plate 47 to rotate, so that the collecting plate 47 opens and discharges the sand and dust from the dust guiding mechanism 4.

[0029] See also Figure 1 A first window 121 is provided on the side of the car door 12, and a tempered glass is fixedly installed on the side of the first window 121. A second window 122 is provided on the side of the car door 12, and the second window 122 is located directly below the first window 121. A tempered glass is fixedly installed on the side of the second window 122. A handle 123 is fixedly installed on the side of the car door 12, and the handle 123 is located between the first window 121 and the second window 122. A keyhole is provided on the surface of the handle 123.

[0030] See also Figure 3The first sealing strip 21 is rectangular in shape, the second sealing strip 22 is rectangular in shape, and the third sealing strip 23 is rectangular in shape. The rectangular area of ​​the first sealing strip 21 is larger than that of the second sealing strip 22, and the rectangular area of ​​the second sealing strip 22 is larger than that of the third sealing strip 23. The first sealing strip 21 is stepped relative to the second sealing strip 22, and the second sealing strip 22 is stepped relative to the third sealing strip 23. The first sealing strip 21 is buffered and connected to the second sealing strip 22 through the hollow of the first support block 25, and the second sealing strip 22 is buffered and connected to the third sealing strip 23 through the hollow of the second support block 24.

[0031] The first sealing strip 21 is buffer-connected to the second sealing strip 22 through the hollow of the first support block 25, and the second sealing strip 22 is buffer-connected to the third sealing strip 23 through the hollow of the second support block 24, so that the sealing mechanism 2 is deformed and can be tightly attached to the door frame when the vehicle door 12 is closed, and the gap between the sealing mechanism 2 and the vehicle door 12 is very small, thereby ensuring the sealing performance of the sealing mechanism 2.

[0032] See also Figure 4 The inner wall of the first support block 25 is fixedly connected with a memory alloy wire 26, which is spiral-shaped. One end of the memory alloy wire 26 is connected to the upper surface of the inner wall of the first support block 25, and the other end of the memory alloy wire 26 is connected to the lower surface of the inner wall of the first support block 25.

[0033] A memory alloy wire 26 is provided in the hollow interior of the first support block 25 connecting the first sealing strip 21 and the second sealing strip 22. Due to the deformation ability of the memory alloy wire 26, the sealing mechanism 2 can be deformed back to its original shape when the vehicle door 12 is opened, thereby ensuring the service life of the sealing mechanism 2.

[0034] See also Figure 5 and Figure 7 The upper surface of the dust guide groove 42 is provided with dust guide holes 421, and the dust guide holes 421 are evenly distributed on the upper surface of the dust guide groove 42. The side of the dust guide hole 421 is fixedly connected with a dust guide column 46, and the interior of the dust guide column 46 is a hollow hexagonal structure.

[0035] The interior of the dust guide column 46 is a hollow hexagonal structure. When dust is adsorbed from the dust guide column 46 to the partition 44, the dust guide column 46 has a certain length to prevent the dust from escaping from the dust guide column 46 when blown by the fan 43, thereby preventing the dust from running back into the cab.

[0036] See also Figures 1-9When in use, step one is to pull the handle 123 on the side of the driving shell 11, the door 12 is opened by rotating the hinge 13, and the driver enters the cab. A seat 18 is provided inside the driving shell 11, and the driver sits on the seat 18 and closes the door 12. The driver operates the pedals 16 and the steering rod 17 to control the movement of the excavator.

[0037] Step 2. When the vehicle door 12 is closed, the area of ​​the first sealing strip 21 of the sealing mechanism 2 is larger than that of the second sealing strip 22, and the area of ​​the second sealing strip 22 is larger than that of the third sealing strip 23, so that the sealing mechanism 2 presents a stepped shape, and the first supporting block 25 connecting the first sealing strip 21 and the second sealing strip 22 is a hollow structure, and the second supporting block 24 connecting the second sealing strip 22 and the third sealing strip 23 is a hollow structure. The first supporting block 25 and the second supporting block 24 can be deformed, and when squeezed to the frame of the vehicle door 12, the sealing mechanism 2 can better fit the door gap.

[0038] Step 3: A memory alloy wire 26 is provided in the hollow interior of the first support block 25 connecting the first sealing strip 21 and the second sealing strip 22. Due to the deformation ability of the memory alloy wire 26, the sealing mechanism 2 can be deformed back to its original shape when the vehicle door 12 is opened, thereby extending the service life of the sealing mechanism 2.

[0039] Step 4: The electrostatic adsorption plate 45 adsorbs the sand and dust, and adsorbs the sand and dust from the dust guide hole 421 on the surface of the dust guide groove 42 to the partition 44. The wind force of the fan 43 is used to blow the sand and dust to the top of the dust suction hole 52. At the same time, the dust suction fan 55 installed around the circle 53 drives the surrounding air flow to blow the sand and dust to the gravity sensing plate 48. When the gravity sensing plate 48 senses a certain gravity, the servo motor 62 starts to move.

[0040] Step 5. The servo motor 62 drives the motor shaft 63 to rotate. The first gear 631 on the motor shaft 63 rotates to drive the second gear 611 on the rotating column 61 to rotate, thereby driving the rotating column 61 to rotate. The rotating column 61 is connected to the collecting plate 47 through the connecting block 612. The rotating column 61 drives the collecting plate 47 to rotate, so that the collecting plate 47 opens and discharges the sand and dust from the dust guiding mechanism 4.

[0041] Step 6: The filter 32 in the filter tank 31 filters sand, dust and small particles in the air. When the vehicle door 12 is closed, air enters the cab through the filter 32 , and the sand, dust and small particles in the air are adsorbed by the filter 32 .

[0042] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dust-proof cab for an excavator, comprising a driving mechanism (1), characterized in that: The side of the driving mechanism (1) is movably connected to a sealing mechanism (2), the upper surface of the driving mechanism (1) is installed with a filtering mechanism (3), the bottom of the inner cavity of the driving mechanism (1) is installed with a dust guide mechanism (4), the center of the inner cavity of the dust guide mechanism (4) is installed with a dust suction mechanism (5), and the inner wall side of the dust guide mechanism (4) is installed with a rotating mechanism (6); The driving mechanism (1) includes a driving shell (11), a hinge (13) is installed on the side of the driving shell (11), a door (12) is movably connected to the side of the hinge (13), a rear window (14) is opened on the side of the driving shell (11), and a window glass is provided on the rear window (14), a fuel tank (15) is fixedly installed on the side of the driving shell (11), a pedal (16) is movably connected to the bottom of the inner cavity of the driving shell (11), a steering rod (17) is movably connected to the bottom of the inner cavity of the driving shell (11), and a seat (18) is fixedly installed on the bottom of the inner cavity of the driving shell (11), and the seat (18) is located at the center of the rear side of the bottom of the inner cavity of the driving shell (11); The dust guide mechanism (4) includes a dust guide shell (41) fixedly mounted on the lower surface of the inner cavity of the driving mechanism (1), a dust guide groove (42) is provided on the upper surface of the dust guide shell (41), a dust guide column (46) is fixedly connected to the lower surface of the dust guide shell (41), and the dust guide columns (46) are equidistantly distributed on the lower surface of the dust guide shell (41), a partition (44) is fixedly mounted on the inner wall side of the dust guide shell (41), an electrostatic adsorption plate (45) is fixedly mounted on the upper surface of the partition (44), a fan (43) is fixedly mounted on the side of the dust guide shell (41), and the fans (43) are all on the same horizontal line and located above the partition (44), and the lower part of the inner cavity of the dust guide shell (41) is movably connected to a collecting plate (47), and a gravity sensing plate (48) is fixedly mounted on the upper surface of the collecting plate (47).

2. The anti-sand and dust cab for an excavator according to claim 1, characterized in that: The sealing mechanism (2) includes a first sealing strip (21) fixedly connected to the side of the vehicle door (12), a first support block (25) fixedly connected to the upper surface of the first sealing strip (21), the interior of the first support block (25) being a hollow structure, a second sealing strip (22) fixedly connected to the upper surface of the first support block (25), a second support block (24) fixedly connected to the upper surface of the second sealing strip (22), the interior of the second support block (24) being a hollow structure, and a third sealing strip (23) fixedly connected to the upper surface of the second support block (24).

3. The anti-sand and dust cab for an excavator according to claim 1, characterized in that: The filtering mechanism (3) comprises a filtering tank (31) provided on the upper surface of the driving housing (11), a filtering plate (32) being installed on the upper surface of the filtering tank (31), the filtering plate (32) being rectangular in shape, and having equidistant pores provided on the surface of the filtering plate (32).

4. The dust-proof cab for an excavator according to claim 1, characterized in that: The dust collection mechanism (5) comprises a connecting piece (51) fixedly connected to the center of the upper surface of the partition (44); a dust collection circular hole (52) is opened in the center of the connecting piece (51); a mounting ring (53) surrounding the dust collection circular hole (52) is fixedly connected to the side of the connecting piece (51); a mounting block (54) is fixedly mounted on the side of the mounting ring (53); the mounting blocks (54) are equidistantly distributed on the side of the mounting ring (53); and a dust collection fan (55) is fixedly mounted on the side of the mounting block (54).

5. The sand and dust proof cab for an excavator according to claim 1, characterized in that: The rotating mechanism (6) includes a servo motor (62) fixedly mounted below the inner wall side of the dust guide housing (41); a motor shaft (63) is movably connected to the center of the upper surface of the servo motor (62); the motor shaft (63) is transmission-connected to the rotating column (61) through gear engagement; the rotating column (61) is movably connected below the inner wall side of the dust guide housing (41); and the rotating column (61) is rotationally connected to the dust guide housing (41) through a bearing.

6. The sand and dust proof cab for an excavator according to claim 5, characterized in that: A first gear (631) is fixedly connected to the side of the motor shaft (63), a second gear (611) is fixedly connected to the side of the rotating column (61), the gear teeth of the second gear (611) and the gear teeth of the first gear (631) are meshed with each other, and the rotating column (61) is transmission-connected to the motor shaft (63) through the meshing of the gear teeth of the second gear (611) and the first gear (631), and a connecting block (612) is fixedly connected to the side of the rotating column (61), and the connecting block (612) is fixedly connected to the collecting plate (47) via screws.

7. The dust-proof cab for an excavator according to claim 1, characterized in that: A first window (121) is provided on the side of the vehicle door (12), and a tempered glass is fixedly installed on the side of the first window (121). A second window (122) is provided on the side of the vehicle door (12), and the second window (122) is located directly below the first window (121). A tempered glass is fixedly installed on the side of the second window (122). A handle (123) is fixedly installed on the side of the vehicle door (12), and the handle (123) is located between the first window (121) and the second window (122). A keyhole is provided on the surface of the handle (123).

8. The sand and dust proof cab for an excavator according to claim 1, characterized in that: The first sealing strip (21) is rectangular in shape, the second sealing strip (22) is rectangular in shape, and the third sealing strip (23) is rectangular in shape. The rectangular area of ​​the first sealing strip (21) is larger than that of the second sealing strip (22), and the rectangular area of ​​the second sealing strip (22) is larger than that of the third sealing strip (23). The first sealing strip (21) presents a stepped shape relative to the second sealing strip (22), and the second sealing strip (22) presents a stepped shape relative to the third sealing strip (23). The first sealing strip (21) is buffer-connected to the second sealing strip (22) through the hollow of the first supporting block (25), and the second sealing strip (22) is buffer-connected to the third sealing strip (23) through the hollow of the second supporting block (24).

9. The sand and dust proof cab for an excavator according to claim 8, characterized in that: A memory alloy wire (26) is fixedly connected to the inner wall of the first support block (25), and the memory alloy wire (26) is spiral-shaped. One end of the memory alloy wire (26) is connected to the upper surface of the inner wall of the first support block (25), and the other end of the memory alloy wire (26) is connected to the lower surface of the inner wall of the first support block (25).

10. The sand and dust proof cab for an excavator according to claim 1, characterized in that: The upper surface of the dust guide groove (42) is provided with dust guide holes (421), the dust guide holes (421) are evenly spaced on the upper surface of the dust guide groove (42), and the side surfaces of the dust guide holes (421) are fixedly connected with dust guide columns (46), the interior of the dust guide columns (46) being a hollow hexagonal structure.

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