Air-blowing cleaning mechanism

Abstract

The utility model relates to the technical field of cleaning, in particular to an air-blowing cleaning mechanism, which is characterized in that an air-blowing box body is connected with a box cover through a box cover lifting device, and the box cover is opened and closed through the box cover lifting device; a transverse moving air-blowing device is mounted at one end of an inner cavity of the air-blowing box body, and a fixed air-blowing device is mounted at the other end of the inner cavity of the air-blowing box body; a material receiving device is arranged in the air blowing box body in a penetrating manner, the material receiving device is positioned above the transverse moving air blowing device and the fixed air blowing device, the angle of the air blowing device is adjustable through a multi-point nozzle and a universal nozzle joint, multi-point strong linear airflow is jetted, and a ball valve is adopted at an inlet, so that the airflow quantity can be adjusted, and the effect of the jetted airflow is ensured; air blowing cleaning is carried out on various workpieces before machining, after machining or during two-sequence butt joint, preparation is made for next-sequence production, and the multiple purposes of cleaning, dust removal, cooling, drying, air drying and the like are met; and the distance of the material receiving component is adjustable, workpieces of various sizes can be compatible, manual adjustment is not needed, and the practical efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning, in particular to an air blowing cleaning mechanism. Background Art

[0002] During the processing of the workpiece, there will be debris or cutting fluid on the surface of the workpiece, and the staff needs to clean it to remove the moisture, oil and debris attached to the surface to avoid affecting subsequent work. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problems existing in the prior art in the above-mentioned background technology, an air blowing cleaning mechanism is provided for performing air blowing cleaning on various workpieces before processing, after processing or when two sequences are connected, so as to prepare for the next sequence of production.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an air blowing cleaning mechanism, including an air blowing box body, a box cover is hingedly connected to one side of the air blowing box body, the air blowing box body and the box cover are connected by a box cover lifting device, and the box cover is opened and closed by the box cover lifting device; a transversely movable air blowing device is installed at one end of the inner cavity of the air blowing box body, and a fixed air blowing device is installed at the other end of the inner cavity of the air blowing box body; a material receiving device for mounting workpieces is penetrated through the air blowing box body, and the material receiving device is located above the transversely movable air blowing device and the fixed air blowing device.

[0005] Furthermore, the transversely movable air blowing device includes a driving part and an air blowing part, wherein the driving part is located outside the air blowing box body, and the air blowing part is located in the inner cavity of the air blowing box body;

[0006] The air blowing part includes a guide shaft installed on the air blowing box body, and linear bearings are installed on the shaft bodies of the two guide shafts. An air blowing assembly base is set between the two linear bearings, and air blowing seats are installed at both ends of the air blowing assembly base. The upper ends of the two air blowing seats are connected by an air blowing connecting plate.

[0007] Nozzles are installed on the two air blowing seats and the air blowing connecting plate, and the air outlets of the nozzles are all set towards the workpiece;

[0008] A floating block is installed on the bottom surface of the bottom plate of the air blowing component.

[0009] Furthermore, a slide groove is provided on the surface of the bottom plate of the blowing component, and air blowing seats are installed at both ends of the slide groove. The two air blowing seats are connected by a left-right rotating connecting rod, and a handle is installed at one end of the left-right rotating connecting rod.

[0010] Furthermore, a first long hole that is connected to the slide groove is opened on one side of both ends of the bottom plate of the air blowing component; an open groove is opened on both ends of the air blowing connecting plate, and a second long hole that is connected to the open groove is opened on one side of both ends of the air blowing connecting plate; a third long hole is opened on the upper part of the air blowing seat in the vertical direction.

[0011] Furthermore, the driving part includes a rodless cylinder and a driving transmission plate, and the rodless cylinder is installed on the outer box wall of the air blowing box through a mounting plate; a cylinder driving plate is installed on the slide of the rodless cylinder, and the cross-sectional shape of the cylinder driving plate is "L"-shaped, and a slot is provided at the edge of the bottom surface of the horizontal plate of the cylinder driving plate, and the horizontal plate of the cylinder driving plate extends into the inner cavity of the air blowing box; one end of the driving transmission plate is inserted into the slot and locked by a bolt, and an opening is provided at the other end of the driving transmission plate, and the floating block in the driving part is inserted into the opening.

[0012] Furthermore, the fixed air blowing device includes an air blowing support plate, on which a bracket and several nozzle mounting plates are installed. The bracket is arranged close to the support shaft in the material receiving device, and a cylindrical nozzle arranged toward the workpiece is installed on the bracket; the nozzle mounting plates are arranged in parallel along the transverse direction of the air blowing support plate, and each nozzle mounting plate is installed with a universal nozzle joint, and an air blowing nozzle is installed on the universal nozzle joint. Ball valves are installed at the inlets of the two air blowing nozzles, and the ball valves are connected to the quick-plug connector.

[0013] Furthermore, the material receiving device includes a symmetrically arranged adjustment group, which is installed on the two symmetrical outer walls of the air blowing box through an adjusting cylinder mounting plate; the adjustment groups are connected by a number of support shafts, which form a mounting area after installation, and the workpiece is clamped on the mounting area; each adjustment group includes an adjusting cylinder, which is installed on the outer wall of the air blowing box through an adjusting cylinder mounting plate, and a cylinder top plate is installed on the protruding end of the adjusting cylinder, and an adjustment plate is installed on the cylinder top plate, and a number of adjustment holes are opened on the plate surface of the adjusting plate, and support shafts are inserted into the adjusting holes, and the vertical cross-sectional shape of the adjusting hole is an "eight" shape.

[0014] Furthermore, a chip collecting device is installed at the lower end of the air blowing box. The chip collecting device is divided into an upper and lower split type, namely an upper split and a lower split. The upper split is an iron chip filter box, and the lower split is an oil collecting box.

[0015] Furthermore, a beam sensor is installed on the inner wall of the air blowing box to detect whether there is a workpiece, and a proximity switch and a hydraulic buffer are installed on the opening side of the air blowing box to detect the opening and closing of the box cover.

[0016] Furthermore, the box cover lifting device includes a cylinder, a box cover connecting plate and a rotating shaft seat. The vertical cross-section of the box cover connecting plate is "L"-shaped, and a sliding groove is provided on the long plate surface of the box cover connecting plate; the protruding end of the cylinder is connected to the short plate of the box cover connecting plate through a floating joint, the rotating shaft seat is installed on the outer wall of the air blowing box body, the cylinder body is installed with a cylinder support, and the rotating shaft seat is installed with a rotating shaft passing through the sliding groove and connected to the cylinder support; the box cover connecting plate and the box cover are connected by a rotating shaft.

[0017] The beneficial effects of the utility model are as follows: the angle of the air blowing device can be adjusted through the multi-point nozzle and the universal nozzle joint, and the air flow can be sprayed in multiple points at the same time. The ball valve is used at the inlet to adjust the air flow rate to ensure the effect of the spray air flow;

[0018] Air blowing is used to clean various workpieces before and after processing or when two processes are connected to prepare for the next production process, meeting multiple purposes such as cleaning, dust removal, cooling, drying, and air drying;

[0019] At the same time, the distance between the connecting parts is adjustable, which is compatible with workpieces of various sizes. There is no need for manual adjustment, which is more practical and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 This utility model Figure 1 A schematic diagram of the structure in another direction;

[0023] Figure 3 It is a three-dimensional diagram of the utility model;

[0024] Figure 4 This is a schematic structural diagram of the utility model's transversely movable air blowing device;

[0025] Figure 5 This utility model Figure 4 A schematic diagram of the structure in another direction;

[0026] Figure 6 This is a schematic structural diagram of the fixed air blowing device of the utility model;

[0027] Figure 7 It is a structural diagram of the material receiving device of the utility model;

[0028] Figure 8 This is a structural diagram of the box cover lifting device of the utility model;

[0029] Figure 9 This utility model Figure 8 A schematic diagram of the structure in another direction;

[0030] Figure 10 It is a structural schematic diagram of the chip receiving device of the utility model;

[0031] In the figure: 100. Air blowing box; 200. Box cover lifting device; 300. Horizontal moving air blowing device; 400. Fixed air blowing device; 500. Material receiving device; 600. Chip receiving device;

[0032] 1. Rodless cylinder; 2. Adjustment plate; 3. Support shaft; 4. Adjustment cylinder;

[0033] 5. Air blow seat; 6. Air blow assembly base plate; 7. Second elongated hole; 8. Cylinder top plate; 9. Nozzle; 10. Air blow connecting plate; 11. Guide shaft; 12. Adjustment cylinder mounting plate; 13. Floating block; 14. Drive transmission plate; 15. Third elongated hole; 16. Slot; 17. First elongated hole; 18. Adjustment hole; 23. Cylinder drive plate; 25. Linear bearing;

[0034] 30. Air blowing support plate; 31. Cylindrical nozzle; 33. Handle; 35. Air blowing nozzle; 36. Universal nozzle joint; 37. Nozzle mounting block; 38. Ball valve; 39. Quick connector; 41. Bracket;

[0035] 50. Upper body; 51. Lower body; 53. Hydraulic buffer; 55. Organic glass; 56. Box cover; 65. Pressure plate; 67. Proximity switch;

[0036] 85. Box cover connecting plate; 86. Rotating shaft seat; 88. Cylinder; 89. Left and right rotating connecting rod; 94. Cylinder support; 98. Floating joint; 99. Sliding groove; 105. Through-beam sensor. DETAILED DESCRIPTION

[0037] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0038] like Figures 1 to 10 The air blowing cleaning mechanism shown includes an air blowing box 100, a box cover 56 hingedly connected to one side of the air blowing box 100, the box cover 56 being made of bent sheet metal with organic glass 55 attached thereto, and a pressure plate 65 fixing the organic glass 55. The air blowing box 100 and the box cover 56 are connected by a box cover lifting device 200, and the box cover 56 is opened and closed by the box cover lifting device 200;

[0039] A transversely movable air blowing device 300 is installed at one end of the inner cavity of the air blowing box 100, and a fixed air blowing device 400 is installed at the other end of the inner cavity of the air blowing box 100;

[0040] A material receiving device 500 for mounting workpieces is provided in the air blowing box 100 . The material receiving device 500 is located above the transversely movable air blowing device 300 and the fixed air blowing device 400 .

[0041] The air blowing box 100 is mainly made of sheet metal bending, which is firmly welded, light in weight, high in strength and easy to install.

[0042] like Figures 4-5 As shown, the transversely moving air blowing device 300 includes a driving part and an air blowing part, wherein the driving part is located outside the air blowing box 100 and the air blowing part is located in the inner cavity of the air blowing box 100;

[0043] The air blowing part includes a guide shaft 11 installed on the air blowing box 100, which provides support and guidance for the transversely movable air blowing device 300. Linear bearings 25 are installed on the shafts of the two guide shafts 11, so that the transversely movable air blowing assembly 300 moves laterally along the guide shafts 11. An air blowing assembly base plate 6 is mounted between the two linear bearings 25. Air blowing seats 5 are installed at both ends of the air blowing assembly base plate 6. The upper ends of the two air blowing seats 5 are connected by an air blowing connecting plate 10.

[0044] The power source of the horizontally movable air blowing device 300 is provided by the rodless cylinder 1. The two air blowing seats 5 and the air blowing connecting plate 10 are both equipped with nozzles 9 through nozzle joints. The nozzle joints are universal and adjustable in direction. The air outlets of the nozzles 9 are all set toward the workpiece.

[0045] A floating block 13 is installed on the bottom surface of the air blowing assembly bottom plate 6 to transmit power.

[0046] In addition, a slide groove is provided on the surface of the bottom plate 6 of the air blowing component, and air blowing seats 5 are installed at both ends of the slide groove, and the two air blowing seats 5 are connected by a left-right rotating connecting rod 89. A handle 33 is installed at one end of the left-right rotating connecting rod 89. When in use, the handle 33 is turned, and the left-right rotating connecting rod 89 is rotated, driving the air blowing seats 5 at both ends to move along the reference groove of the bottom plate 6 of the air blowing component, thereby realizing the adjustment of the distance between the two groups of air blowing seats to meet the needs of air blowing cleaning of workpieces of different specifications.

[0047] In addition, a first long hole 17 is provided on each side of both ends of the bottom plate 6 of the air blowing assembly, which is connected to the slide groove;

[0048] Both ends of the air-blowing connecting plate 10 are provided with an open slot, and both ends of the air-blowing connecting plate 10 are provided with a second long hole 7 that passes through the open slot.

[0049] The upper portion of the air blowing seat 5 is provided with a third elongated hole 15 in the vertical direction.

[0050] The driving part includes a rodless cylinder 1 and a driving transmission plate 14. The rodless cylinder 1 is mounted on the outer wall of the air blowing box 100 through a mounting plate.

[0051] A cylinder drive plate 23 is mounted on the slide of the rodless cylinder 1. The cross-section of the cylinder drive plate 23 is L-shaped. A slot 16 is provided at the bottom edge of the horizontal plate of the cylinder drive plate 23, and the horizontal plate of the cylinder drive plate 23 extends into the inner cavity of the air blowing box 100.

[0052] One end of the driving transmission plate 14 is inserted into the slot 16 and is locked by a bolt. The other end of the driving transmission plate 14 is provided with an opening, and the floating block 13 in the driving part is inserted into the opening.

[0053] like Figure 6 As shown, the fixed air blowing device 400 includes an air blowing support plate 30, and threaded holes are provided at both ends of the air blowing support plate 30. The fixed air blowing device is installed inside the air blowing box 100 through the threaded holes. A bracket 41 and a plurality of nozzle mounting plates 37 are installed on the air blowing support plate 30. The bracket 41 is arranged near the support shaft 3 in the material receiving device 500. A cylindrical nozzle 31 is installed on the bracket 41 and is arranged toward the workpiece, which can clean the channels and small gaps on the workpiece.

[0054] The nozzle mounting plates 37 are arranged in parallel along the transverse direction of the air blowing support plate 30. A universal nozzle joint 36 is installed on each nozzle mounting plate 37. An air blowing nozzle 35 is installed on the universal nozzle joint 36. The air blowing nozzle 35 is a multi-point nozzle, which makes the air blowing device angle adjustable and sprays multiple points of strong linear airflow at the same time. Ball valves 38 are installed at the inlet of the two air blowing nozzles 35 to adjust the air flow rate to ensure the effect of the spray airflow. The ball valve 38 is connected to the quick plug connector 39.

[0055] like Figures 7-8 As shown, the material receiving device 500 includes a symmetrically arranged adjustment group, which is installed on two symmetrical outer side walls of the air blowing box 100 through an adjustment cylinder mounting plate 12;

[0056] The adjustment groups are connected by a plurality of support shafts 3. After the plurality of support shafts 3 are installed, a mounting area is formed, and the workpiece is clamped on the mounting area.

[0057] Each adjustment group includes an adjusting cylinder 4, which is installed on the outer wall of the air blowing box 100 through an adjusting cylinder mounting plate 12. The protruding end of the adjusting cylinder 4 is installed with a cylinder top plate 8, and an adjusting plate 2 is installed on the cylinder top plate 8. A plurality of oblique adjustment holes 18 are opened on the plate surface of the adjusting plate 2, and a support shaft 3 is inserted into the adjusting hole 18. The vertical cross-section of the adjusting hole 18 is in the shape of an "eight". By moving the piston of the adjusting cylinder 4 up and down, the support shaft 3 is driven to move along the long hole on the adjusting plate 2, so that the adjustment of the spacing of the material receiving device 500 can be automatically adjusted according to the system setting to avoid tipping during the placement of the workpiece.

[0058] like Figure 10 As shown, a chip collecting device 600 is installed at the lower end of the air blowing box 100. The chip collecting device 600 is divided into an upper and lower split type, namely an upper split 50 and a lower split 51. The upper split is an iron chip filter box, and the main component is a molybdenum wire mesh installed at the bottom, which is used to separate iron chips; the lower split 51 is an oil collecting box, which is used to collect liquid attached to the workpiece.

[0059] like Figure 1 As shown, a beam sensor 105 is installed on the inner wall of the air blowing box 100 to detect whether there is a workpiece, and a proximity switch 67 and a hydraulic buffer 53 are installed on the opening side of the air blowing box 100 to detect the opening and closing of the box cover 56.

[0060] like Figures 8-9 As shown, the box cover lifting device 200 includes a cylinder 88, a box cover connecting plate 85 and a rotating shaft seat 86. The vertical cross-section of the box cover connecting plate 85 is "L"-shaped, and a sliding groove 99 is opened on the long plate surface of the box cover connecting plate 85;

[0061] The extended end of the cylinder 88 is connected to the short plate of the box cover connecting plate 85 through the floating joint 98.

[0062] The rotating shaft seat 86 is mounted on the outer wall of the air blowing box body 100, and a cylinder support 94 is mounted on the cylinder body of the air cylinder 88. A rotating shaft passing through the sliding groove 99 and connected to the cylinder support 94 is mounted on the rotating shaft seat 86. The cylinder 88 drives the box cover connecting plate 85 to move, so that the rotating shaft seat 86 moves along the internal groove of the box cover connecting plate 85, thereby driving the box cover 56 to open and close; the cylinder 88 drives the box cover connecting plate 85 to move, so that the rotating shaft seat 86 moves along the internal groove of the box cover connecting plate 85, thereby driving the box cover 56 to open and close;

[0063] Rotating shafts are installed on both sides of the box cover 56. One end of the box cover connecting plate 85 is connected to the box cover 56 through the rotating shaft, and the other end of the box cover connecting plate 85 is connected to the cylinder support 94 through a threaded hole.

[0064] Workflow:

[0065] First, the gripper places the workpiece housing on the support shaft 3 of the receiving device 500, and the width of the clamping area between the two support shafts 3 is adaptively adjusted according to the specifications of the workpiece;

[0066] Then, the through-beam sensor 105 detects the workpiece, the piston rod of the cylinder 88 extends, driving the box cover connecting plate 85 downward, the box cover 56 is closed, and the proximity switch 67 detects that the box cover 56 is closed;

[0067] The rodless cylinder 1 drives the lateral air blowing device 300 to move horizontally to perform air blowing cleaning on the top surface and both sides of the workpiece;

[0068] After completion, the piston rod of the air cylinder 88 retracts, the box cover 56 opens, and the next sequence of claws (other parts, not included in this device) grabs the workpiece to the fixed air blowing device 400 to clean the bottom of the workpiece and the channel with air blowing;

[0069] Finally, after cleaning is completed, the gripper grabs the workpiece and sends it to the next process, and this cycle repeats.

[0070] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An air blowing cleaning mechanism, characterized in that: The invention comprises an air blowing box body (100), a box cover (56) is hingedly connected to one side of the air blowing box body (100), the air blowing box body (100) and the box cover (56) are connected via a box cover lifting device (200), and the box cover (56) is opened and closed via the box cover lifting device (200); A transversely movable air blowing device (300) is installed at one end of the inner cavity of the air blowing box (100), and a fixed air blowing device (400) is installed at the other end of the inner cavity of the air blowing box (100); A material receiving device (500) for mounting workpieces is provided in the air blowing box (100), and the material receiving device (500) is located above the transversely movable air blowing device (300) and the fixed air blowing device (400).

2. An air blowing cleaning mechanism according to claim 1, characterized in that: The transversely moving air blowing device (300) comprises a driving part and an air blowing part, wherein the driving part is located outside the air blowing box (100) and the air blowing part is located in the inner cavity of the air blowing box (100); The air blowing part comprises a guide shaft (11) mounted on an air blowing box (100), linear bearings (25) are mounted on the shafts of the two guide shafts (11), an air blowing assembly base plate (6) is arranged between the two linear bearings (25), air blowing seats (5) are mounted at both ends of the air blowing assembly base plate (6), and the upper ends of the two air blowing seats (5) are connected via an air blowing connecting plate (10); Nozzles (9) are installed on the two air blowing seats (5) and the air blowing connecting plate (10), and the air outlets of the nozzles (9) are arranged toward the workpiece; A floating block (13) is installed on the bottom surface of the air blowing component bottom plate (6).

3. The air blowing cleaning mechanism according to claim 2, characterized in that: A slide groove is provided on the surface of the bottom plate (6) of the air blowing assembly, and air blowing seats (5) are installed at both ends of the slide groove. The two air blowing seats (5) are connected by a left-right rotating connecting rod (89), and a handle (33) is installed at one end of the left-right rotating connecting rod (89).

4. The air blowing cleaning mechanism according to claim 2, characterized in that: A first long hole (17) that is in communication with the slide groove is provided on one side of each of the two ends of the air blowing component bottom plate (6); Both ends of the air-blowing connecting plate (10) are provided with open slots, and both ends of the air-blowing connecting plate (10) are provided with second elongated holes (7) that pass through the open slots. The upper part of the air blowing seat (5) is provided with a third long hole (15) along the vertical direction.

5. The air blowing cleaning mechanism according to claim 2, characterized in that: The driving part comprises a rodless cylinder (1) and a driving transmission plate (14), wherein the rodless cylinder (1) is mounted on the outer box wall of the air blowing box (100) via a mounting plate; A cylinder drive plate (23) is mounted on the slide of the rodless cylinder (1), the cross section of the cylinder drive plate (23) is L-shaped, a clamping groove (16) is provided at the edge of the bottom surface of the horizontal plate of the cylinder drive plate (23), and the horizontal plate of the cylinder drive plate (23) extends into the inner cavity of the air blowing box (100); One end of the driving transmission plate (14) is clamped into the clamping groove (16) and locked by a bolt. The other end of the driving transmission plate (14) is provided with an opening, and the floating block (13) in the driving part is inserted into the opening.

6. The air blowing cleaning mechanism according to claim 1, characterized in that: The fixed air blowing device (400) includes an air blowing support plate (30), a bracket (41) and a plurality of nozzle mounting plates (37) are mounted on the air blowing support plate (30), the bracket (41) is arranged close to the support shaft (3) in the material receiving device (500), and a cylindrical nozzle (31) is mounted on the bracket (41) and is arranged toward the workpiece; The nozzle mounting plates (37) are arranged in parallel along the transverse direction of the air blowing support plate (30), and each nozzle mounting plate (37) is installed with a universal nozzle joint (36), and the universal nozzle joint (36) is installed with an air blowing nozzle (35). Ball valves (38) are installed at the inlets of the two air blowing nozzles (35), and the ball valves (38) are connected to the quick connector (39).

7. The air blowing cleaning mechanism according to claim 1, characterized in that: The material receiving device (500) comprises a symmetrically arranged adjustment group, which is mounted on two symmetrical outer side walls of the air blowing box (100) via an adjustment cylinder mounting plate (12); The adjustment groups are connected via a plurality of support shafts (3), and after the plurality of support shafts (3) are installed, a mounting area is formed, and the workpiece is clamped on the mounting area; Each adjustment group includes an adjustment cylinder (4), which is mounted on the outer wall of the air blowing box (100) through an adjustment cylinder mounting plate (12). A cylinder top plate (8) is mounted on the protruding end of the adjustment cylinder (4), and an adjustment plate (2) is mounted on the cylinder top plate (8). A plurality of adjustment holes (18) are opened on the plate surface of the adjustment plate (2), and a support shaft (3) is inserted into the adjustment hole (18). The cross-section of the adjustment hole (18) in the vertical direction is in the shape of an "eight" character.

8. The air blowing cleaning mechanism according to claim 1, characterized in that: The lower end of the air blowing box (100) is equipped with a chip receiving device (600), which is divided into an upper and lower split type, namely an upper split (50) and a lower split (51). The upper split is an iron chip filter box, and the lower split (51) is an oil receiving box.

9. The air blowing cleaning mechanism according to claim 1, characterized in that: A beam sensor (105) is installed on the inner wall of the air blowing box (100) to detect the presence of a workpiece, and a proximity switch (67) and a hydraulic buffer (53) are installed on the side of the opening of the air blowing box (100) to detect the opening and closing of the box cover (56).

10. The air blowing cleaning mechanism according to claim 1, characterized in that: The box cover lifting device (200) includes a cylinder (88), a box cover connecting plate (85) and a rotating shaft seat (86); the box cover connecting plate (85) has an "L"-shaped cross section in the vertical direction, and a sliding groove (99) is provided on the long plate surface of the box cover connecting plate (85); The extended end of the cylinder (88) is connected to the short plate of the box cover connecting plate (85) through a floating joint (98). The rotating shaft seat (86) is mounted on the outer wall of the air blowing box (100), the cylinder body of the cylinder (88) is mounted with a cylinder support (94), and the rotating shaft seat (86) is mounted with a rotating shaft passing through the sliding groove (99) and connected to the cylinder support (94); The box cover connecting plate (85) is connected to the box cover (56) via a rotating shaft.

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