Sandblasting device and sandblasting method for gearbox processing

Abstract

The present invention relates to the technical field of gearbox processing equipment, and specifically discloses a sandblasting device and a sandblasting method for gearbox processing, comprising a main structure, a sandblasting structure, a fixing structure and a limiting structure; the sandblasting structure is connected to the main structure, and the sandblasting structure is located on the right side of the main structure, the fixing structure is fixedly arranged in the main structure, and the limiting structure is fixedly arranged on the rear side wall of the sandblasting box in the main structure; the present invention can perform comprehensive sandblasting on the gearbox, and achieve comprehensive sandblasting on the gearbox through the swingable sandblasting effect and the rotating gearbox to adjust the wall surface, thereby ensuring that all surfaces of the gearbox can be uniformly sandblasted, improving the effect of removing burrs, reducing processing time and labor costs through automation and comprehensive sandblasting, thereby improving overall production efficiency, and the equipment can adapt to gearboxes of different sizes and shapes, and has high flexibility and adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of gear box processing equipment, and in particular to a sandblasting device and a sandblasting method for gear box processing. Background Art

[0002] Gearboxes have a wide range of applications, such as in wind turbines. Gearboxes are an important mechanical component that is widely used in wind turbines. Their main function is to transmit the power generated by the wind wheel under the action of wind to the generator and make it obtain a corresponding rotation speed. Gearboxes are produced by casting, but the cast gearboxes will have burrs, which need to be removed by sandblasting. However, the existing equipment has a single sandblasting function, and the gearbox needs to be manually turned to replace the wall and inner wall. After multiple times, the burrs can be completely removed. Therefore, a sandblasting device and a sandblasting method for gearbox processing are designed. Summary of the invention

[0003] The object of the present invention is to provide a sandblasting device and a sandblasting method for gearbox processing to solve the problems raised in the above background technology.

[0004] In order to solve the above-mentioned problem, the present invention provides the following technical solutions: a sandblasting device for gearbox processing, comprising a main structure, a sandblasting structure, a fixing structure and a limiting structure; the sandblasting structure is connected to the main structure, and the sandblasting structure is located on the right side of the main structure, the fixing structure is fixedly arranged in the main structure, and the limiting structure is fixedly arranged on the center line of the rear side wall of the sandblasting box in the main structure.

[0005] Preferably, the main structure includes a sandblasting box, a first supporting plate, a pair of second supporting plates, a collecting box, a first motor and a turntable; a delivery port is provided in the middle of the top end of the front side wall of the sandblasting box, and a collecting port is provided in the middle of the bottom end of the front side wall of the sandblasting box, a telescopic port is provided on the center line of the rear side wall of the sandblasting box, and the telescopic port is located above the turntable, a door body is provided on the front side of the sandblasting box, the front and rear ends of the first supporting plate are respectively fixedly arranged on the front and rear side walls of the sandblasting box and are located below the delivery port, one end of a pair of second supporting plates are respectively fixedly arranged on the center lines of the left and right side walls of the sandblasting box, and the second supporting plate is located above the first supporting plate, the collecting box can be detachably inserted into the collecting port, and the front side wall of the collecting box is symmetrically provided with handles, the first motor is fixedly arranged on the middle of the upper wall of the first supporting plate, the turntable is fixedly arranged on the driving end of the first motor, and the turntable is located above the second supporting plate.

[0006] Preferably, the sandblasting structure includes a sandblasting machine body, a rotating shaft frame, a second motor, a third motor, a swing frame and a nozzle; the sandblasting machine body is arranged on the right side of the sandblasting box, and the two ends of the rotating shaft frame are movably inserted in the left and right side walls of the sandblasting box and close to the top end, the middle part of the rotating shaft frame is a rectangular frame structure, the second motor is fixedly arranged on the right side wall of the sandblasting box and the second motor driving end is connected to the right end of the rotating shaft frame, the third motor is fixedly arranged in the middle of the rotating shaft frame, and the third motor driving end movably passes through the middle of the rotating shaft frame, one end of the swing frame movably passes through the middle of the rotating shaft frame, and one end of the swing frame is fixedly mounted on the second motor driving end, the nozzle is detachably inserted in the other end of the swing frame and the nozzle is vertically downward, and the nozzle is connected to the sandblasting machine body through a pipe, and the pipe passes through the upper wall of the sandblasting box.

[0007] Preferably, the firmware structure includes a pair of firmware units with the same structure, and the pair of firmware units are symmetrically arranged on the second supporting plate; the firmware units include an electric slide rail, a bracket, a pair of connecting rods, a chassis, a fourth motor, a hydraulic cylinder and a clamp; the electric slide rail is fixedly arranged on one of the second supporting plates, one end of the bracket is fixedly arranged on the electric slide rail and the bracket can move left and right, one end of a pair of connecting rods is respectively connected to the other end of the bracket in parallel, the chassis is movably connected to the other ends of the two connecting rods, and the chassis is horizontally located above the turntable, the fourth motor is fixedly arranged in the chassis, and the fourth motor driving end movably passes through the chassis, one end of the hydraulic cylinder is movably connected to one end of the bracket, and the other end of the hydraulic cylinder is tilted upward and movably connected to the middle lower wall of one of the connecting rods, and the clamp is fixedly arranged on the driving end of the fourth motor and the clamp is located above the turntable.

[0008] Preferably, the limiting structure includes a baffle, a locking rod, a gear rod, a spring, a limiting arm, a fastening bolt, an electric push rod and a docking rod; the baffle is fixedly arranged on the rear side wall of the sandblasting box and is located above the telescopic opening, and telescopic grooves are symmetrically arranged on both ends of the left and right ends of the baffle, one end of the locking rod is movably arranged on the upper wall of the baffle and close to the middle of the left end, one end of the gear rod is movably inserted into the telescopic groove of the baffle, and the other end of the gear rod is located at the front side of the telescopic opening, the other end of the gear rod is a trapezoidal structure, the gear rod is provided with a locking opening near the top side wall, the locking opening is engaged with the locking rod, and one end of the spring is fixedly arranged on The middle part of the gear rod, and the spring is attached to the lower wall of the baffle, the gear rod moves up and down on the baffle and compresses the spring, the limit arm is movably inserted in the telescopic opening, and ratchets are equidistantly arranged on the upper wall of one end of the limit arm, the ratchet of the limit arm is clamped with the other end of the gear rod, and a slot is arranged on the upper wall of the other end of the limit arm, the fastening bolt is movably screwed to the other end of the limit arm and connected with the slot, one end of the electric push rod is fixedly arranged on the rear wall of the sandblasting box and is located on the left side of the telescopic opening, one end of the docking rod is movably sleeved on the telescopic end of the electric push rod, and the other end of the docking rod is flipped and clamped in the slot of the limit arm.

[0009] Preferably, the connecting rod flips to drive the chassis to move horizontally up and down.

[0010] Preferably, the clamping plate is lifted and lowered to maintain a vertical state.

[0011] Preferably, the rotating shaft frame and the swing frame drive the spray head to swing forward and backward and left and right respectively.

[0012] A sandblasting method for gearbox machining comprises the following steps:

[0013] Step 1: According to the length or width of the processed gear box, adjust the length of the telescopic opening of the limit arm in the limit structure through the rear side wall of the sandblasting box, so that the limit arm is located above the middle of the turntable, and adjust the shielding distance according to the telescopic length, so as to limit the gear box and ensure that the firmware structure can clamp the middle of the gear box side wall;

[0014] Step 2: Place the cast gearbox on the turntable with the opening facing upward and the shaft holes at the front and back;

[0015] Step 3: Control the firmware structure to clamp the gear box too high, and then control the sandblasting structure to sandblast the gear box to remove burrs, and at the same time control the nozzle to swing left and right or front and back to perform comprehensive impact to remove burrs;

[0016] Step 4: The gear box is driven to rotate by controlling the third motor in the chassis, so as to remove burrs from the front and rear walls and the lower wall of the gear box and perform sandblasting on the inner wall of the gear box;

[0017] Step 5: Then lower the gearbox onto the turntable. After controlling the turntable to rotate 90 degrees, the side wall of the gearbox is clamped and lifted again through the firmware structure. The wall surface processed in step 3 can be replaced and sandblasted again to achieve full sandblasting of the gearbox.

[0018] The present invention provides a sandblasting device and a sandblasting method for gearbox processing, which have the following beneficial effects:

[0019] 1. Ability to fully sandblast the gearbox: Through the swingable sandblasting effect and rotating the gearbox to adjust the wall surface, the gearbox can be fully sandblasted, ensuring that all surfaces of the gearbox can be evenly sandblasted and improving the burr removal effect.

[0020] 2. Automatic replacement of clamping wall: Since the two clamping walls cannot be sandblasted together, the equipment can replace the clamping wall by itself. This automatic function reduces manual intervention, improves production efficiency, and reduces the labor intensity of operators.

[0021] 3. Improve production efficiency: Through automation and comprehensive sandblasting, processing time and labor costs are reduced, thereby improving overall production efficiency.

[0022] 4. Reduce manual intervention: Automated replacement of clamping walls and comprehensive sandblasting reduce the need for manual operation, reduce the risk of human error, and improve the consistency and stability of operation.

[0023] 5. Flexibility and adaptability: The equipment can adapt to gearboxes of different sizes and shapes, has high flexibility and adaptability, and is suitable for a variety of production needs.

[0024] In summary, compared with existing equipment, the present invention has higher production efficiency, better product quality, less operator intervention, and higher flexibility and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the assembly structure of the present invention.

[0027] Figure 3 The schematic diagram shows the main structure of the present invention.

[0028] Figure 4 The schematic diagram of the sandblasting structure of the present invention is shown.

[0029] Figure 5 It is a schematic diagram showing an enlarged structure of the firmware structure of the present invention.

[0030] Figure 6 For the present invention Figure 4 A partial enlarged view of point A in the figure.

[0031] Figure 7 For the present invention Figure 1 A partial enlarged view of point B in FIG.

[0032] Figure 8 For the present invention Figure 1 A partial enlarged view of point C in the figure.

[0033] Fig. 9 The figure is a schematic diagram showing the structure of the limit structure of the present invention.

[0034] Fig.10 It is a schematic diagram of the assembly structure of the limiting structure of the present invention.

[0035] Fig.11 For the present invention Fig. 9 A partial enlarged view of point D in the figure.

[0036] Fig.12For the present invention Fig. 9 A partial enlarged view of point E in the figure.

[0037] Fig.13 For the present invention Fig. 9 A partial enlarged view of point F in FIG.

[0038] In the figure: 1. main structure; 11. sandblasting box; 12. first bearing plate; 13. second bearing plate; 14. collecting box; 15. first motor; 16. turntable; 17. door body; 2. sandblasting structure; 21. sandblasting machine body; 22. rotating shaft frame; 23. second motor; 24. third motor; 25. swing frame; 26. nozzle; 3. firmware structure; 31. electric slide rail; 32. bracket; 33. connecting rod; 34. chassis; 35. fourth motor; 36. hydraulic cylinder; 37. clamp; 4. limiting structure; 41. baffle; 42. locking rod; 43. gear rod; 44. spring; 45. limiting arm; 46. fastening bolt; 47. electric push rod; 48. docking rod; 5. telescopic opening; 6. locking opening. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 13 The present invention provides a technical solution: a sandblasting device for gearbox processing, comprising a main structure 1, a sandblasting structure 2, a fixing structure 3 and a limiting structure 4; the sandblasting structure 2 is connected to the main structure 1, and the sandblasting structure 2 is located on the right side of the main structure 1, and the fixing structure 3 is fixedly arranged in the main structure 1; the gearbox is carried and rotated by the main structure 1 and the sand shot is assisted to be recovered, the sandblasting structure 2 is used to sandblast and remove burrs, the box body is clamped, fixed, lifted and flipped to replace the sandblasting wall surface by the fixing structure 3, and the limiting structure 4 is fixedly arranged on the center line of the rear side wall of the sandblasting box 11 in the main structure 1.

[0041] As a further solution of the present invention, the main structure 1 includes a sandblasting box 11, a first bearing plate 12, a pair of second bearing plates 13, a collecting box 14, a first motor 15 and a turntable 16; a delivery port is provided in the middle of the top of the front side wall of the sandblasting box 11, and a collecting port is provided in the middle of the bottom of the front side wall of the sandblasting box 11, a telescopic port is provided on the rear side wall of the sandblasting box 11 near the center line, and the telescopic port is located above the turntable 16, a door body 17 is provided on the front side of the sandblasting box 11, and the front and rear ends of the first bearing plate 12 are respectively fixedly arranged on the front and rear side walls of the sandblasting box 11 and are located below the delivery port, and a pair of second bearing plates 14 are provided on the front and rear side walls of the sandblasting box 11 and are located below the delivery port. One end of the carrier plate 13 is fixedly arranged on the center line of the left and right side walls in the sandblasting box 11, and the second carrier plate 13 is located above the first carrier plate 12. The collecting box 14 is detachably inserted in the collecting port, and the front wall of the collecting box 14 is symmetrically provided with handles. The first motor 15 is fixedly arranged in the middle of the upper wall of the first carrier plate 12, and the turntable 16 is fixedly arranged on the driving end of the first motor 15, and the turntable 16 is located above the second carrier plate 13; the turntable 16 is driven by the first motor 15 on the first carrier plate 12 to rotate and adjust the wall clamped by the gear box during processing, and the sand pills are recovered through the collecting box 14.

[0042] As a further solution of the present invention, the sandblasting structure 2 includes a sandblasting machine body 21, a rotating shaft frame 22, a second motor 23, a third motor 24, a swing frame 25 and a nozzle 26; the sandblasting machine body 21 is arranged on the right side of the sandblasting box 11, and the two ends of the rotating shaft frame 22 are respectively movably inserted in the left and right side walls of the sandblasting box 11 and close to the top part, the middle part of the rotating shaft frame 22 is a rectangular frame structure, the second motor 23 is fixedly arranged on the right side wall of the sandblasting box 11 and the driving end of the second motor 23 is connected to the right end of the rotating shaft frame 22, the third motor 24 is fixedly arranged in the middle of the rotating shaft frame 22, and the driving end of the third motor 24 is movably inserted in the middle of the rotating shaft frame 22. It passes through the middle part of the rotating shaft frame 22, one end of the swing frame 25 movably passes through the middle part of the rotating shaft frame 22, and one end of the swing frame 25 is fixedly mounted on the driving end of the second motor 23, the nozzle 26 is detachably inserted into the other end of the swing frame 25 and the nozzle 26 is vertically downward, the nozzle 26 is connected to the sandblasting machine body 21 through a pipeline, and the pipeline passes through the upper wall of the sandblasting box 11, and the sandblasting machine body 21 carries the sand and provides power to spray the sand and the sand is passed to the nozzle 26, and the sand is sprayed through the nozzle 26, and the rotating shaft frame 22 is controlled by the second motor 23 to drive the nozzle 26 to swing back and forth, and the third motor 24 drives the nozzle 26 to swing left and right.

[0043] As a further solution of the present invention, the firmware structure 3 includes a pair of firmware units with the same structure, and the pair of firmware units are symmetrically arranged on the second bearing plate 13; the firmware unit includes an electric slide rail 31, a bracket 32, a pair of connecting rods 33, a chassis 34, a fourth motor 35, a hydraulic cylinder 36 and a clamping plate 37; the electric slide rail 31 is fixedly arranged on one of the second bearing plates 13, one end of the bracket 32 ​​is fixedly arranged on the electric slide rail 31 and the bracket 32 ​​can move left and right, one end of a pair of connecting rods 33 is respectively connected to the other end of the bracket 32 ​​in parallel, the chassis 34 is movably connected to the other end of the two connecting rods 33, and the chassis 34 is horizontally located above the turntable 16, the fourth motor 35 is fixedly arranged in the chassis 34, and the fourth motor 35 drives The moving end movably runs through the chassis 34, one end of the hydraulic cylinder 36 is movably connected to the bracket 32 ​​near one end, and the other end of the hydraulic cylinder 36 is movably connected to the lower wall of the middle part of one of the connecting rods 33 in an upward tilt, and the clamping plate 37 is fixedly arranged on the driving end of the fourth motor 35 and the clamping plate 37 is located above the turntable 16; the clamping plate 37 is driven to move left and right by the electric slide 31 to adjust the width or length of the processed gear box, and one of the connecting rods 33 is driven to flip on the bracket 32 ​​by the hydraulic cylinder 36. The two connecting rods 33 are arranged in parallel and are movably connected to the chassis 34, so that the chassis 34 is driven to rise horizontally and move relatively close, and during the lifting process of the gear box, the electric slide 31 is controlled to drive the clamping plate 37 to move relatively away to maintain the clamping distance and lift the gear box.

[0044] As a further solution of the present invention, the limiting structure 4 includes a baffle 41, a locking rod 42, a gear rod 43, a spring 44, a limiting arm 45, a fastening bolt 46, an electric push rod 47 and a docking rod 48; the baffle 41 is fixedly arranged on the rear side wall of the sandblasting box 11 and is located above the telescopic opening 5, and the left and right ends of the baffle 41 are symmetrically provided with telescopic grooves, one end of the locking rod 42 is movably arranged on the upper wall of the baffle 41 and close to the middle of the left end, one end of the gear rod 43 is movably passed through the telescopic groove of the baffle 41, and the other end of the gear rod 43 is located at the front side of the telescopic opening 5, the other end of the gear rod 43 is a trapezoidal structure, and the gear rod 43 is provided with a lock port 6 near the top side wall, and the lock port 6 is engaged with the locking rod 42, and one end of the spring 44 It is fixedly arranged in the middle of the gear rod 43, and the spring 44 is attached to the lower wall of the baffle 41. The gear rod 43 moves up and down on the baffle 41 and compresses the spring 44. The limit arm 45 is movably inserted in the telescopic opening 5, and ratchets are equidistantly arranged on the upper wall of one end of the limit arm 45. The ratchets of the limit arm 45 are clamped with the other end of the gear rod 43, and a groove is arranged on the upper wall of the other end of the limit arm 45. The fastening bolt 46 is movably screwed on the other end of the limit arm 45 and connected with the groove. One end of the electric push rod 47 is fixedly arranged on the rear side wall of the sandblasting box 11 and is located on the left side of the telescopic opening 5. One end of the docking rod 48 is movably sleeved on the telescopic end of the electric push rod 47, and the other end of the docking rod 48 is flipped and clamped in the groove of the limit arm 45.

[0045] As a further solution of the present invention, the connecting rod 33 is flipped to drive the chassis 34 to move horizontally up and down, which is used to design the linkage transmission requirements.

[0046] As a further solution of the present invention, the clamping plate 37 is lifted and moved to maintain a vertical state, which is used for design requirements to achieve horizontal lifting of the gear box workpiece.

[0047] As a further solution of the present invention, the rotating shaft frame 22 and the swing frame 25 drive the spray head 26 to swing forward and backward and left and right respectively, which is used for sandblasting at different positions.

[0048] Working principle:

[0049] First, according to the length or width of the box for processing gears, the length of the telescopic opening 5 through which the limiting arm 45 in the limiting structure 4 passes through the rear side wall of the sandblasting box is adjusted; the limiting arm 45 can be manually pushed into the sandblasting box, and since the upper wall of the limiting arm 45 is provided with ratchets and is clamped with the corresponding gear rod 43, the limiting arm 45 can only move in one direction through the sandblasting box and cannot be forced to move out of the sandblasting box; that is, the gear rod 43 is pressed against the baffle 41 by the spring 44 and exerts force downward to drive the gear rod 43 to descend and always maintain the clamping state; then, after the limiting arm 45 enters the sandblasting box, it is located above the middle of the turntable to block the rear side, and the left and right sides of the gear box can be blocked by the clamping plates in the firmware structure, so that the gear box is positioned when it is placed to prevent the offset from causing collision during the rotation after fixation;

[0050] The spring 44 can also be compressed by pulling up the gear rod 43, so that the lock of the gear rod 43 rises and passes through the baffle 41, and then the lock rod 42 is turned to insert the other end into the lock for locking. At this time, the gear rod 43 rises and disengages from the limit arm 45 and is limited at a high position; then the docking rod 48 is turned over to insert it into the slot of the limit arm 45 and tighten the fastening bolt 46 to fix it. At this time, the limit arm 45 is driven by the electric push rod 47 to move electrically, and the limit arm 45 is controlled to extend into the sandblasting box or move out for adjustment;

[0051] The gear box is placed on the turntable 16 in the sandblasting box 11 in the main structure 1. Since most gear boxes are modular, they have an open box body without an upper wall for placing gears or bearings and shaft rods for installation. Therefore, the open wall faces upward and is opposite to the nozzle 26 in the sandblasting structure 2.

[0052] Then, after the door body 17 is closed, the electric slide rail 31 on the second bearing plate 13 is controlled to drive the clamping plate 37 in the fixing structure 3 to move relatively and fit the left and right side walls of the gear box, and then the hydraulic cylinder 36 is driven to extend. As the hydraulic cylinder 36 extends, the connecting rod 33 is driven to always flip in parallel on the bracket 32, and as it flips upward, the clamping plate 37 is driven to move relatively close to clamp the gear box; as the hydraulic cylinder 36 is controlled to extend, the electric slide rail 31 is synchronously controlled to drive the bracket 32 ​​to move left and right to adjust the spacing, so that the gear box is clamped while the spacing change of the relative flipping of the support rod is matched, so that the gear box is clamped and lifted by force;

[0053] Then the sandblasting machine body 21 can be driven to perform downward sandblasting through the nozzle 26; during the sandblasting process, the opening of the gear box is facing upward, so the sandblasting is performed on the edge of the upper wall and the inner wall of the gear box, and it is necessary to control the second motor 23 to drive the rotating shaft frame 22 to rotate back and forth to drive the nozzle 26 to swing forward and backward, and control the third motor 24 to drive the swing frame 25 to swing left and right to drive the nozzle 26 to swing left and right, so as to adjust the sandblasting direction;

[0054] After the inner wall of the gear box is sandblasted, the fourth motor 35 in the control box 34 drives the clamping plate 37 to rotate 90 degrees each time, so that the sandblasting of the front and rear walls and the lower wall of the gear box can be adjusted, and then at this time, only the clamped left and right side walls of the processed gear box are not sandblasted;

[0055] After controlling the electric slide rail 31 and the hydraulic cylinder 36 to cooperate to lower the gear box and place it on the turntable 16, the first motor 15 on the first supporting plate 12 is controlled to drive the turntable 16 to rotate 90 degrees, so that the clamping wall surface of the clamping plate 37, that is, the clamping wall surface after processing, can be replaced, and the above-mentioned sandblasting process is repeated again, and the last two wall surfaces are sandblasted to realize the processing of the overall outer wall surface and inner wall surface of the gear box; at the same time, in the process of the clamping plate 37 driving the gear box to rotate, the sand pills for sandblasting the inner wall will also be poured out and fall into the collection box 14 below for recycling.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sandblasting device for gearbox processing, characterized in that: It comprises a main structure (1), a sandblasting structure (2), a fixing structure (3) and a limiting structure (4); the sandblasting structure (2) is connected to the main structure (1), and the sandblasting structure (2) is located on the right side of the main structure (1); the fixing structure (3) is fixedly arranged in the main structure (1); and the limiting structure (4) is fixedly arranged on the center line of the rear side wall of the sandblasting box (11) in the main structure (1); The main structure (1) comprises a sandblasting box (11), a first bearing plate (12), a pair of second bearing plates (13), a collecting box (14), a first motor (15) and a turntable (16); The sandblasting box (11) is provided with a delivery port at the middle of the top of the front side wall, and a collection port is provided at the middle of the bottom of the front side wall of the sandblasting box (11). The sandblasting box (11) is provided with a telescopic port on the center line of the rear side wall, and the telescopic port is located above the turntable (16). The sandblasting box (11) is provided with a door body (17) at the front side. The front and rear ends of the first bearing plate (12) are respectively fixedly arranged on the front and rear side walls of the sandblasting box (11) and are located below the delivery port. A pair of the second bearing plates (13) are provided. The ends are respectively fixedly arranged on the center lines of the left and right side walls in the sandblasting box (11), and the second bearing plate (13) is located above the first bearing plate (12), the collecting box (14) can be detachably inserted into the collecting port, and the front side wall of the collecting box (14) is symmetrically provided with handles, the first motor (15) is fixedly arranged in the middle of the upper wall of the first bearing plate (12), the turntable (16) is fixedly arranged on the driving end of the first motor (15), and the turntable (16) is located above the second bearing plate (13); The limiting structure (4) comprises a baffle (41), a locking rod (42), a gear rod (43), a spring (44), a limiting arm (45), a fastening bolt (46), an electric push rod (47) and a docking rod (48); The baffle (41) is fixedly arranged on the rear side wall of the sandblasting box (11) and is located above the telescopic opening (5). Telescopic grooves are symmetrically arranged on both the left and right ends of the baffle (41). One end of the locking rod (42) is movably arranged on the upper wall of the baffle (41) and close to the middle of the left end. One end of the gear rod (43) is movably inserted into the telescopic groove of the baffle (41), and the other end of the gear rod (43) is located in front of the telescopic opening (5). The other end of the gear rod (43) is a trapezoidal structure. A locking opening (6) is arranged on the gear rod (43) near the top side wall. The locking opening (6) is engaged with the locking rod (42). One end of the spring (44) is fixedly arranged in the middle of the gear rod (43), and the spring (44) is attached to the lower wall of the baffle (41). (43) moves up and down on the baffle (41) and compresses the spring (44), the limit arm (45) is movably inserted into the telescopic opening (5), and the upper wall of one end of the limit arm (45) is equidistantly provided with ratchet teeth, the ratchet teeth of the limit arm (45) are clamped with the other end of the gear rod (43), and the upper wall of the other end of the limit arm (45) is provided with a clamping groove, the fastening bolt (46) is movably screwed to the other end of the limit arm (45) and communicated with the clamping groove, one end of the electric push rod (47) is fixedly arranged on the rear side wall of the sandblasting box (11) and is located on the left side of the telescopic opening (5), one end of the docking rod (48) is movably sleeved on the telescopic end of the electric push rod (47), and the other end of the docking rod (48) is flipped and clamped in the clamping groove of the limit arm (45).

2. A sandblasting device for gearbox processing according to claim 1, characterized in that: The sandblasting structure (2) comprises a sandblasting machine body (21), a rotating shaft frame (22), a second motor (23), a third motor (24), a swing frame (25), and a spray head (26); The sandblasting machine body (21) is arranged on the right side of the sandblasting box (11), and the two ends of the rotating shaft frame (22) are respectively movably inserted into the left and right side walls of the sandblasting box (11) and close to the top end. The middle part of the rotating shaft frame (22) is a rectangular frame structure. The second motor (23) is fixedly arranged on the right side wall of the sandblasting box (11) and the driving end of the second motor (23) is connected to the right end of the rotating shaft frame (22). The third motor (24) is fixedly arranged in the rotating shaft frame (22). The third motor (24) is movably connected to the middle of the rotating shaft frame (22), and the driving end of the third motor (24) is movably connected to the middle of the rotating shaft frame (22). One end of the swing frame (25) is movably connected to the middle of the rotating shaft frame (22), and one end of the swing frame (25) is fixedly mounted on the driving end of the second motor (23). The nozzle (26) is detachably inserted into the other end of the swing frame (25) and the nozzle (26) is vertically downward. The nozzle (26) is connected to the sandblasting machine body (21) through a pipeline, and the pipeline passes through the upper wall of the sandblasting box (11).

3. A sandblasting device for gearbox processing according to claim 2, characterized in that: The firmware structure (3) comprises a pair of firmware units with the same structure, and the pair of firmware units are symmetrically arranged on the second carrying board (13); The hardware unit comprises an electric slide rail (31), a bracket (32), a pair of connecting rods (33), a chassis (34), a fourth motor (35), a hydraulic cylinder (36) and a clamping plate (37); The electric slide rail (31) is fixedly arranged on one of the second bearing plates (13); one end of the bracket (32) is fixedly arranged on the electric slide rail (31) and the bracket (32) can move left and right; one end of a pair of connecting rods (33) is respectively connected in parallel to the other end of the bracket (32); the chassis (34) is movably connected to the other ends of the two connecting rods (33), and the chassis (34) is horizontally located above the turntable (16); the fourth motor (35) is fixedly arranged in the chassis (34), and the driving end of the fourth motor (35) movably penetrates the chassis (34); one end of the hydraulic cylinder (36) is movably connected to one end of the bracket (32), and the other end of the hydraulic cylinder (36) is movably connected to the middle lower wall of one of the connecting rods (33) in an upward tilted manner; the clamping plate (37) is fixedly arranged on the driving end of the fourth motor (35), and the clamping plate (37) is located above the turntable (16).

4. A sandblasting device for gearbox processing according to claim 3, characterized in that: The connecting rod (33) turns over to drive the chassis (34) to move horizontally up and down.

5. A sandblasting device for gearbox processing according to claim 4, characterized in that: The clamping plate (37) moves up and down to maintain a vertical state.

6. A sandblasting device for gearbox processing according to claim 5, characterized in that: The rotating shaft frame (22) and the swing frame (25) respectively drive the spray head (26) to swing forward and backward and left and right.

7. A sandblasting method for gearbox processing, which is applied to a sandblasting device for gearbox processing as claimed in claim 6, characterized in that: The following steps are involved: Step 1: According to the length or width of the processed gear box, adjust the length of the limit arm (45) in the limit structure (4) penetrating the telescopic opening (5) on the rear side wall of the sandblasting box, so that the limit arm (45) is located above the middle of the turntable, and adjust the shielding distance according to the telescopic length, so as to facilitate the gear box to be limited and ensure that the firmware structure (3) can clamp the middle of the gear box side wall; Step 2: Place the cast gearbox on the turntable (16) with the opening facing upward and the shaft holes at the front and back; Step 3, controlling the firmware structure (3) to clamp and lift the gearbox, and then controlling the sandblasting structure (2) to sandblast the gearbox to remove burrs, while controlling the nozzle (26) to swing left and right or back and forth to perform comprehensive impact to remove burrs; Step 4: driving the gear box to rotate by controlling the third motor (24) in the chassis (34), thereby removing burrs from the front and rear walls and the lower wall of the gear box and performing sandblasting on the inner wall of the gear box; Step 5: The gearbox is then lowered onto the turntable (16). After the turntable (16) is controlled to rotate 90 degrees, the side wall of the gearbox is clamped and lifted again by the firmware structure (3). The wall surface processed in step 3 can be replaced and sandblasted again, thereby achieving full sandblasting of the gearbox.

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