Complex curved surface part sand blasting machine

Abstract

The utility model relates to a sand blasting machine for parts with complex curved surfaces, which belongs to the technical field of sand blasting machines and comprises a sand blasting box, a mounting port is arranged on the right side of the sand blasting box, a glass plate is fixed on the inner side of the mounting port, a cleaning mechanism convenient for cleaning the glass plate is arranged on the sand blasting box, and a filter plate is fixed on the inner side of the sand blasting box. A sand blasting mechanism facilitating sand blasting work is arranged on the sand blasting box. According to the sand blasting machine for the complex curved surface parts, through cooperation of a driving motor, a rotating rod can be driven to rotate, so that a rotating plate is driven to rotate, through rotation of the rotating plate, a connecting plate can be driven to rotate and move, so that a transmission gear circularly rotates and moves on a first rack, and through cooperation of the transmission gear, a second rack can be driven to circularly move; and therefore, the brushing plate and the bristles are driven to move circularly, the glass plate is cleaned continuously, and sand grains are prevented from adhering to the glass plate to block sight in the sand blasting process.

Description

Technical Field

[0001] The utility model relates to the technical field of sandblasting machines, in particular to a sandblasting machine for parts with complex curved surfaces. Background Art

[0002] Sandblasting machine belongs to the category of air conveying machinery. It uses compressed air in a pipeline to transport powdered particles (diameter 1~4mm) from one place to another. In the process of converting kinetic energy into potential energy, the high-speed moving sand particles scour the surface of the object, thereby improving the surface quality of the object.

[0003] For example, a sandblasting machine for small complex curved surface parts is disclosed in the Chinese utility model patent publication number (CN211867514U), which includes a sandblasting chamber, which is a box-shaped structure, a sand box is provided on the top of the sandblasting chamber, a driving device is provided on the top of the sand box, a sand feeding pipe is connected to the side of the sand box located outside the sandblasting chamber, a flexible sandblasting pipe is connected to the bottom of the sand box, a glass observation window and a hand hole are provided on the front of the sandblasting chamber, a mesh plate is provided at the bottom of the sandblasting chamber, and a sand collecting box is provided under the mesh plate. This utility solves the problem that small complex curved surface parts have uneven surface sandblasting or no surface sandblasting due to their small size and complex surface, which brings difficulties to the subsequent coating process, resulting in rework and reducing work efficiency. However, due to the fine sand particles flying in the box during the sandblasting process and easily adhering to the glass plate used for observation, the staff cannot see the sandblasting situation on the surface of the parts clearly, and the sand particles that block the line of sight cannot be cleaned in this patent, which reduces the efficiency of sandblasting and affects practicality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sandblasting machine for parts with complex curved surfaces, which has the advantages of being able to clean the sand attached to the glass plate at any time, etc., and solves the problem that fine sand will fly in the box during the sandblasting process and easily adhere to the glass plate used for observation, resulting in the staff not being able to see the sandblasting conditions on the surface of the parts clearly, while the patent cannot clean the sand that blocks the line of sight, which reduces the efficiency of the sandblasting and affects the practicality.

[0005] To achieve the above object, the utility model provides the following technical solutions: a sandblasting machine for parts with complex curved surfaces, comprising a sandblasting box, a mounting opening is opened on the right side of the sandblasting box, a glass plate is fixed inside the mounting opening, a cleaning mechanism for cleaning the glass plate is arranged on the sandblasting box, a filter plate is fixed inside the sandblasting box, and a sandblasting mechanism for convenient sandblasting is arranged on the sandblasting box;

[0006] The cleaning mechanism includes a mounting plate, a driving member, a transmission member, and a cleaning member. The mounting plate is fixed to the right inner wall of the sandblasting box. The driving member is arranged on the sandblasting box to drive the transmission member. The transmission member is arranged on the mounting plate to drive the cleaning member to work. The cleaning member is arranged on the mounting plate to continuously clean the glass plate.

[0007] The beneficial effect of adopting the above further solution is that the sand particles flying and adhering to the glass plate during the sandblasting process can be cleaned off, ensuring that the workers have a clear field of vision during the sandblasting.

[0008] Furthermore, the driving component includes a driving motor, a rotating rod, and a rotating plate. The driving motor is fixed to the right side of the sandblasting box, one end of the rotating rod is fixed to the output shaft of the driving motor, the other end of the rotating rod is rotatably connected to the left inner wall of the mounting plate through a bearing, and the rotating plate is fixed to the outer side of the rotating rod.

[0009] The beneficial effect of adopting the above further solution is that the transmission member can perform transmission work.

[0010] Furthermore, the transmission component includes a connecting plate, a transmission gear, and a first rack. The connecting plate is hinged to the left side of the rotating plate through a hinge shaft, the transmission gear is rotatably connected to the right side of the connecting plate through a bearing, the first rack is fixed to the inner bottom wall of the mounting plate, and the transmission gear is meshed with the first rack.

[0011] The beneficial effect of adopting the above further solution is that the cleaning member can be driven to perform reciprocating operation so that the glass plate is continuously cleaned.

[0012] Furthermore, the cleaning member includes a limiting rod, a second rack, a connecting block, a brush plate, and bristles. The two ends of the limiting rod are respectively fixed to the front and rear inner walls of the mounting plate. The second rack is slidably connected to the outer side of the limiting rod, and the second rack is meshed with the transmission gear. One side of the connecting block is fixed to the left side of the second rack, and the other side of the connecting block passes through and extends to the left side of the mounting plate and is fixed to the brush plate. The bristles are fixed to the right side of the brush plate.

[0013] The beneficial effects of adopting the above further solution are: it is used to continuously clean the glass plate, maintain the clarity of the glass plate, and improve the efficiency of sandblasting by the staff.

[0014] Furthermore, the sandblasting mechanism includes an operating member, a sandblasting member, and a storage member. The operating member is arranged on the sandblasting box, the sandblasting member is arranged on the sandblasting box, and the storage member is arranged on the sandblasting box.

[0015] The beneficial effect of adopting the above further solution is that the sandblasting gun can be properly placed after the sandblasting work is completed, thereby preventing the sandblasting gun from being damaged due to random placement.

[0016] Furthermore, the operating part includes a protective sleeve and a protective glove. A connecting hole is opened on the right side of the sandblasting box. One end of the protective sleeve is fixed to the right inner wall of the sandblasting box, and the other end of the protective sleeve is connected to the protective glove.

[0017] The beneficial effect of adopting the above further solution is to prevent the limbs from being damaged by sand particles when sandblasting the parts.

[0018] Furthermore, the sandblasting parts include a vacuum compressor, a connecting pipe, a sandblasting machine body, a feed pipe, a discharge pipe, and a spray gun. The vacuum compressor is fixed to the left side of the sandblasting box, one end of the connecting pipe is connected to the output end of the vacuum compressor, the other end of the connecting pipe is connected to the sandblasting machine body, one end of the feed pipe is connected to the feed end of the sandblasting machine body, one end of the discharge pipe is connected to the discharge end of the sandblasting machine body, and the other end of the discharge pipe passes through and extends to the interior of the sandblasting box and is connected to the spray gun.

[0019] The beneficial effect of adopting the above further solution is that the staff can adjust the sandblasting position at will to deal with complex curved surface parts.

[0020] Furthermore, the storage component includes a connecting box, a winding roller, two torsion springs, and a connecting rope. The connecting box is fixed to the left inner wall of the sandblasting box, and the two ends of the winding roller are rotatably connected to the front and rear inner walls of the connecting box through bearings. The two torsion springs are respectively fixed between the front and rear sides of the winding roller and the front and rear inner walls of the connecting box. The connecting rope is wound around the outside of the winding roller, and one end is fixed to the winding roller, and the other end passes through and extends to the right side of the connecting box and is fixed to the spray gun.

[0021] The beneficial effect of adopting the above further solution is that the sandblasting gun can be stored away after the sandblasting work is completed.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] 1. The sandblasting machine for parts with complex curved surfaces can drive the rotating rod to rotate through the cooperation of the driving motor, thereby driving the rotating plate to rotate. Through the rotation of the rotating plate, the connecting plate can be driven to rotate and move, so that the transmission gear can cyclically rotate and move on the first rack. Through the cooperation of the transmission gear, the second rack can be driven to cyclically move, thereby driving the brush plate and bristles to cyclically move, and continuously cleaning the glass plate to avoid sand particles adhering to the glass plate and blocking the line of sight during the sandblasting process.

[0024] 2. The sandblasting machine for complex curved parts can allow the staff to extend their arms into the sandblasting box through the cooperation of protective sleeves and protective gloves, so as to perform detailed sandblasting work on complex curved parts and prevent the arms from being hurt by sand particles. Through the cooperation of the torsion spring, after using the spray gun, release the spray gun, and the torsion spring will rebound the winding roller to the initial position, so that the connecting rope can be rolled up, so that the spray gun can be stored in the designated position to avoid the spray gun being placed randomly and affecting subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the cleaning mechanism of the utility model;

[0027] Figure 3 It is a partial side view of the cleaning mechanism of the utility model;

[0028] Figure 4 This is a schematic diagram of the sandblasting mechanism of the utility model;

[0029] Figure 5 It is a top view of the storage piece of the utility model.

[0030] In the figure: 1, sandblasting box; 2, mounting port; 3, glass plate; 4, cleaning mechanism; 41, mounting plate; 42, driving member; 421, driving motor; 422, rotating rod; 423, rotating plate; 43, transmission member; 431, connecting plate; 432, transmission gear; 433, first rack; 44, cleaning member; 441, limiting rod; 442, second rack; 443, connecting block; 444, brush plate; 445, bristles ; 5. Filter plate; 6. Sandblasting mechanism; 61. Operating part; 611. Protective sleeve; 612. Protective gloves; 613. Connecting hole; 62. Sandblasting part; 621. Vacuum compressor; 622. Connecting pipe; 623. Sandblasting machine body; 624. Feed pipe; 625. Discharge pipe; 626. Spray gun; 63. Storage part; 631. Connection box; 632. Winding roller; 633. Torsion spring; 634. Connecting rope. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1, a sandblasting machine for parts with complex curved surfaces in this embodiment includes a sandblasting box 1, the back of the sandblasting box 1 is hinged with a box door through a hinge shaft, so that the sandblasting box 1 can be opened to put in or take out parts, and an installation port 2 is opened on the right side of the sandblasting box 1, and a glass plate 3 is fixed on the inner side of the installation port 2, which is convenient for observing the internal situation of the sandblasting box 1 during the sandblasting process, and a cleaning mechanism 4 is provided on the sandblasting box 1 to clean the glass plate 3, so that the sand particles flying and adhering to the glass plate 3 during the sandblasting process can be cleaned up, ensuring that the staff has a clear field of vision during sandblasting, and a filter plate 5 is fixed on the inner side of the sandblasting box 1, and the cleaned sand particles can be filtered out and recycled, and the upper surface can be used to prevent tools such as parts, and the bottom end of the sandblasting box 1 is connected with a sand discharge pipe, and a sandblasting mechanism 6 is provided on the sandblasting box 1 to facilitate sandblasting work, so that the sandblasting gun can be properly placed after the sandblasting work is completed, and the sandblasting gun can be prevented from being damaged by random placement.

[0033] See also Figure 2-3 In order to clean up the sand particles flying and adhering to the glass plate 3 during the sandblasting process and ensure that the staff has a clear field of vision during sandblasting, the cleaning mechanism 4 in this embodiment includes a mounting plate 41, a driving member 42, a transmission member 43, and a cleaning member 44. The mounting plate 41 is fixed to the right inner wall of the sandblasting box 1. The driving member 42 is arranged on the sandblasting box 1, and is used to drive the transmission member 43 so that the transmission member 43 can perform transmission work. The transmission member 43 is arranged on the mounting plate 41, and is used to drive the cleaning member 44 to work, so as to drive the cleaning member 44 to reciprocate and continuously clean the glass plate 3. The cleaning member 44 is arranged on the mounting plate 41, and is used to continuously clean the glass plate 3, maintain the clarity of the glass plate 3, and improve the efficiency of sandblasting by the staff.

[0034] In this embodiment, the driving member 42 includes a driving motor 421, a rotating rod 422, and a rotating plate 423. The driving motor 421 is fixed to the right side of the sandblasting box 1, and one end of the rotating rod 422 is fixed to the output shaft of the driving motor 421. The driving motor 421 drives the rotating rod 422 to rotate, and the other end of the rotating rod 422 is rotatably connected to the left inner wall of the mounting plate 41 through a bearing. The rotating plate 423 is fixed to the outer side of the rotating rod 422, and the rotating rod 422 drives the rotating plate 423 to rotate. The transmission member 43 includes a connecting plate 431, a transmission gear 432, and a first rack 433. The connecting plate 431 is hinged to the left side of the rotating plate 423 through a hinge shaft, and the transmission gear 432 is rotatably connected to the right side of the connecting plate 431 through a bearing. The first rack 433 is fixed to the inner bottom wall of the mounting plate 41, and the transmission gear 432 is meshed with the first rack 433. The rotating plate 423 drives the connecting plate 431 to rotate and move, thereby driving the transmission gear 432 reciprocates and moves on the first rack 433. The cleaning member 44 includes a limiting rod 441, a second rack 442, a connecting block 443, a brush plate 444, and bristles 445. The two ends of the limiting rod 441 are respectively fixed to the front and rear inner walls of the mounting plate 41. The second rack 442 is slidably connected to the outer side of the limiting rod 441, and the second rack 442 is meshed with the transmission gear 432. One side of the connecting block 443 is fixed to the left side of the second rack 442. The rotation and movement of the transmission gear 432 drives the second rack 442 to reciprocate, thereby driving the connecting block 443 to move. The other side of the connecting block 443 passes through and extends to the left side of the mounting plate 41 and is fixed to the brush plate 444. The connecting block 443 drives the brush plate 444 to move. The bristles 445 are fixed to the right side of the brush plate 444, and the brush plate 444 drives the bristles 445 to move, thereby cleaning the glass plate 3 to ensure a clear field of view during operation.

[0035] See also Figure 4-5 In order to properly place the sandblasting gun after the sandblasting work is completed and avoid damage caused by the sandblasting gun being placed randomly, the sandblasting mechanism 6 in this embodiment includes an operating member 61, a sandblasting member 62, and a storage member 63. The operating member 61 is arranged on the sandblasting box 1 to prevent the limbs from being injured by sand particles when sandblasting the parts. The sandblasting member 62 is arranged on the sandblasting box 1 so that the staff can arbitrarily adjust the sandblasting position to deal with complex curved surface parts. The storage member 63 is arranged on the sandblasting box 1 so that the sandblasting gun can be stored after the sandblasting work is completed.

[0036] In this embodiment, the operating part 61 includes a protective sleeve 611 and a protective glove 612. A connecting hole 613 is provided on the right side of the sandblasting box 1. One end of the protective sleeve 611 is fixed to the right inner wall of the sandblasting box 1, and the other end of the protective sleeve 611 is connected to the protective glove 612. The hand is inserted from the connecting hole 613 to allow the arm to enter the protective glove 612 and the protective sleeve 611 so as to operate the parts. Each corner of the curved part can be sandblasted evenly. The sandblasting part 62 includes a vacuum compressor 621, a connecting pipe 622, a sandblasting machine body 623, a feeding pipe 624, a discharging pipe 625, and a spray gun 626. The vacuum compressor 621 is fixed to the left side of the sandblasting box 1, one end of the connecting pipe 622 is connected to the output end of the vacuum compressor 621, and the other end of the connecting pipe 622 is connected to the sandblasting machine body 623. The vacuum compressor 621 passes the compressed air into the sandblasting machine body 623 through the connecting pipe 622. One end of the feed pipe 624 is connected to the feed end of the sandblasting machine body 623, and a negative pressure is formed in the sandblasting machine body 623, so that the sand particles are sucked into the feed pipe 624 and passed into the sandblasting machine body 623 from the feed pipe 624. One end of the discharge pipe 625 is connected to the discharge end of the sandblasting machine body 623. The other end passes through and extends to the interior of the sandblasting box 1 and is connected to the spray gun 626. The discharge pipe 625 passes the sand into the spray gun 626, and the spray gun 626 sprays the sand to facilitate the sandblasting operation of the parts. The storage component 63 includes a connecting box 631, a winding roller 632, two torsion springs 633, and a connecting rope 634. The connecting box 631 is fixed to the left inner wall of the sandblasting box 1, and the two ends of the winding roller 632 are respectively rotatably connected to the front and rear inner walls of the connecting box 631 through bearings. The two torsion springs 633 are respectively fixed between the front and rear sides of the winding roller 632 and the front and rear inner walls of the connecting box 631. The connecting rope 634 is wound around the winding roller 632. The outer side of the winding roller 632, and one end is fixed to the winding roller 632, and the other end passes through and extends to the right side of the connecting box 631, and is fixed to the spray gun 626. Pick up the spray gun 626. When the spray gun 626 is moved, the spray gun 626 drives the connecting rope 634 to move, and the movement of the connecting rope 634 drives the winding roller 632 to rotate, so that the connecting rope 634 can be extended to increase the freedom of the spray gun 626. After completing the sandblasting work, release the spray gun 626, and after the torsion spring 633 loses the external force, the winding roller 632 bounces back, so that the connecting rope 634 is wound up, thereby the spray gun 626 is collected to the connecting box 631, and the spray gun 626 is stored.

[0037] The working principle of the above embodiment is:

[0038] (1) When sandblasting a part with a complex curved surface is required, the part is first placed in the sandblasting box 1, and then the hand is inserted from the connection hole 613, so that the arm enters the protective glove 612 and the protective sleeve 611, so as to operate the part, and each corner of the curved surface part can be sandblasted evenly. Then, the spray gun 626 is picked up, and when the spray gun 626 is moved, the spray gun 626 drives the connecting rope 634 to move, and the movement of the connecting rope 634 drives the winding roller 632 to rotate, so that the connecting rope 634 can be connected to the sandblasting box 1. The rope 634 is extended to increase the freedom of the spray gun 626, and then the vacuum compressor 621 is turned on. The vacuum compressor 621 passes the compressed air into the sandblasting machine body 623 through the connecting pipe 622, so that a negative pressure is formed in the sandblasting machine body 623, so that the sand particles are sucked into the feed pipe 624, and then pass into the sandblasting machine body 623 from the feed pipe 624, and then pass the sand particles into the spray gun 626 through the discharge pipe 625, and the spray gun 626 sprays the sand particles, which is convenient for the sandblasting operation of the parts.

[0039] (2) During the sandblasting process, sand particles fly inside the sandblasting box 1 and are easily adhered to the glass plate 3 used to observe the condition of the parts, which will block the realization of the sandblasting process. The driving motor 421 is turned on, and the driving motor 421 drives the rotating rod 422 to rotate, and the rotating rod 422 drives the rotating plate 423 to rotate, and the rotating plate 423 drives the connecting plate 431 to rotate and move, thereby driving the transmission gear 432 to reciprocate and move on the first rack 433. The rotation and movement of the transmission gear 432 drives the second rack 433 to rotate and move. The strip 442 moves back and forth, thereby driving the connection block 443 to move, the connection block 443 drives the brush plate 444 to move, and the brush plate 444 drives the bristles 445 to move, thereby cleaning the glass plate 3 to ensure a clear field of vision during operation. After the sandblasting work is completed, the spray gun 626 is released, and after the torsion spring 633 loses the external force, the winding roller 632 is rebounded, so that the connecting rope 634 is wound up, thereby collecting the spray gun 626 to the connection box 631, and storing the spray gun 626.

Claims

1. A sandblasting machine for parts with complex curved surfaces, comprising a sandblasting box (1), characterized in that: The sandblasting box (1) is provided with a mounting opening (2) on the right side thereof, a glass plate (3) is fixed inside the mounting opening (2), the sandblasting box (1) is provided with a cleaning mechanism (4) for conveniently cleaning the glass plate (3), a filter plate (5) is fixed inside the sandblasting box (1), and the sandblasting box (1) is provided with a sandblasting mechanism (6) for conveniently performing sandblasting work; The cleaning mechanism (4) comprises a mounting plate (41), a driving member (42), a transmission member (43), and a cleaning member (44); the mounting plate (41) is fixed to the right inner wall of the sandblasting box (1); the driving member (42) is arranged on the sandblasting box (1) and is used to drive the transmission member (43); the transmission member (43) is arranged on the mounting plate (41) and is used to drive the cleaning member (44) to work; the cleaning member (44) is arranged on the mounting plate (41) and is used to continuously clean the glass plate (3).

2. A sandblasting machine for parts with complex curved surfaces according to claim 1, characterized in that: The driving member (42) comprises a driving motor (421), a rotating rod (422), and a rotating plate (423); the driving motor (421) is fixed to the right side of the sandblasting box (1); one end of the rotating rod (422) is fixed to the output shaft of the driving motor (421); the other end of the rotating rod (422) is rotatably connected to the left inner wall of the mounting plate (41) via a bearing; and the rotating plate (423) is fixed to the outer side of the rotating rod (422).

3. A sandblasting machine for parts with complex curved surfaces according to claim 2, characterized in that: The transmission member (43) comprises a connecting plate (431), a transmission gear (432), and a first rack (433); the connecting plate (431) is hinged to the left side of the rotating plate (423) via a hinge shaft; the transmission gear (432) is rotatably connected to the right side of the connecting plate (431) via a bearing; the first rack (433) is fixed to the inner bottom wall of the mounting plate (41); and the transmission gear (432) is meshed with the first rack (433).

4. A sandblasting machine for parts with complex curved surfaces according to claim 3, characterized in that: The cleaning member (44) comprises a limiting rod (441), a second rack (442), a connecting block (443), a brush plate (444), and bristles (445); the two ends of the limiting rod (441) are respectively fixed to the inner walls of the front and rear sides of the mounting plate (41); the second rack (442) is slidably connected to the outer side of the limiting rod (441), and the second rack (442) is meshed with the transmission gear (432); one side of the connecting block (443) is fixed to the left side of the second rack (442); the other side of the connecting block (443) passes through and extends to the left side of the mounting plate (41) and is fixed to the brush plate (444); and the bristles (445) are fixed to the right side of the brush plate (444).

5. The complex curved surface parts sandblasting machine according to claim 1, characterized in that: The sandblasting mechanism (6) comprises an operating component (61), a sandblasting component (62), and a storage component (63); the operating component (61) is arranged on the sandblasting box (1); the sandblasting component (62) is arranged on the sandblasting box (1); and the storage component (63) is arranged on the sandblasting box (1).

6. A sandblasting machine for parts with complex curved surfaces according to claim 5, characterized in that: The operating member (61) comprises a protective sleeve (611) and a protective glove (612); a connecting hole (613) is provided on the right side of the sandblasting box (1); one end of the protective sleeve (611) is fixed to the right inner wall of the sandblasting box (1); and the other end of the protective sleeve (611) is connected to the protective glove (612).

7. A sandblasting machine for parts with complex curved surfaces according to claim 5, characterized in that: The sandblasting part (62) comprises a vacuum compressor (621), a connecting pipe (622), a sandblasting machine body (623), a feeding pipe (624), a discharging pipe (625), and a spray gun (626); the vacuum compressor (621) is fixed to the left side of the sandblasting box (1); one end of the connecting pipe (622) is connected to the output end of the vacuum compressor (621); the other end of the connecting pipe (622) is connected to the sandblasting machine body (623); one end of the feeding pipe (624) is connected to the feeding end of the sandblasting machine body (623); one end of the discharging pipe (625) is connected to the discharging end of the sandblasting machine body (623); the other end of the discharging pipe (625) penetrates and extends to the interior of the sandblasting box (1) and is connected to the spray gun (626).

8. The complex curved surface parts sandblasting machine according to claim 7, characterized in that: The storage member (63) comprises a connection box (631), a winding roller (632), two torsion springs (633), and a connection rope (634); the connection box (631) is fixed to the left inner wall of the sandblasting box (1); the two ends of the winding roller (632) are rotatably connected to the front and rear inner walls of the connection box (631) via bearings; the two torsion springs (633) are respectively fixed between the front and rear inner walls of the winding roller (632) and the front and rear inner walls of the connection box (631); the connection rope (634) is wound around the outside of the winding roller (632), one end of which is fixed to the winding roller (632), and the other end of which passes through and extends to the right side of the connection box (631) and is fixed to the spray gun (626).

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