Paint spraying device for gearbox shell

Abstract

The invention relates to the technical field of paint spraying devices, and discloses a gearbox shell paint spraying device which comprises a placing frame, the placing frame comprises a top seat, a base and a vertical seat of a frame-shaped structure, and shielding seats for protecting non-paint-spraying areas of an upper shell and a lower shell are elastically arranged at the two ends of the vertical seat correspondingly. A positioning assembly for fixing the upper shell and the lower shell is further arranged, a control assembly for controlling the electric cylinder to start stretching and stop is arranged on the vertical base, and when the upper shell and the lower shell abut against the shielding base and push the shielding base, the control assembly is driven to act and triggers a first inching switch for controlling the electric cylinder to stretch. A first paint spraying assembly and a second paint spraying assembly for spraying paint on the outer side faces and the inner side faces of the upper shell and the lower shell are arranged on the containing frame. According to the device, preparation work before spraying can be improved, paint spraying work can be conducted on the outer surfaces and the inner walls of the upper shell and the lower shell at the same time, and therefore the use efficiency of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of painting devices, and specifically refers to a painting device for a gearbox housing. Background Art

[0002] A gearbox housing is an external structural component that wraps and supports all transmission components (gears, shafts, bearings, oil seals, etc.) inside the gearbox, forming a closed or semi-closed cavity.

[0003] The gearbox housing usually includes an upper housing and a lower housing used in a set. In order to avoid rusting and oxidation of the upper housing and the lower housing during use, it is necessary to spray water-based paint on the outer surface and inner wall of the upper housing and the lower housing during the production process. When painting the upper housing and the lower housing in existing small and medium-sized factories, due to cost limitations, manual methods are usually used to paint the upper housing and the lower housing sequentially. Since the mating surface of the upper housing and the lower housing and the external position where the bearing seat is installed require relatively high installation accuracy, it is necessary to shield and protect the area before painting to avoid the phenomenon of water-based paint spraying on its surface. This requires workers to use masking tape bonding or butter coating methods to shield and protect before painting (remove the masking tape or butter after painting).

[0004] The above operations use masking tape or butter coating methods to protect non-sprayed areas, which are cumbersome and inefficient, affecting the preparation work before painting. Moreover, the upper housing and the lower housing cannot be painted synchronously during painting, reducing the working efficiency of the device. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a painting device for a gearbox housing.

[0006] To solve the above technical problem, the technical solution provided by the present invention is: a painting device for a gearbox housing, including a placement rack. The placement rack includes a top seat, a bottom seat, and a vertical seat with a frame structure, which together form an I-shaped structure. Elastic shielding seats for shielding non-painted areas of the upper housing and the lower housing are respectively provided at both ends of the vertical seat. A positioning component for fixing the upper housing and the lower housing is also provided. The positioning component includes positioning seats arranged on the top seat and the bottom seat and sliding relatively or in opposite directions at both ends of the upper housing and the lower housing respectively. The sliding adjustment of the positioning seats is carried out by the telescopic movement of an electric cylinder. A control component for controlling the start, elongation, and stop of the electric cylinder is provided on the vertical seat. When the upper housing and the lower housing abut against and push the shielding seats, it drives the control component to act and trigger a first momentary switch for controlling the elongation operation of the electric cylinder. When the positioning of the upper housing and the lower housing by the positioning seats is completed, it drives the control component to act and separate from the first momentary switch, causing the electric cylinder to stop operating. The placing rack is provided with a paint spraying assembly one and a paint spraying assembly two for spraying the outer side surfaces and inner side surfaces of the upper shell and the lower shell.

[0007] As an improvement, the control assembly includes a wedge-shaped seat arranged on the shielding seat. A cavity is formed in the vertical seat corresponding to the wedge-shaped seat, and a partition is arranged in this cavity. A movable rod with a resilient function is inserted through the partition. A mating seat adapted to the wedge-shaped seat is arranged on the bottom surface of the movable rod, and a sliding telescopic cylinder is sleeved on the top surface. A guide rod is fixedly arranged on the top wall of the telescopic cylinder, and a spring is sleeved on this guide rod. A guide hole for the guide rod to extend into is formed in the movable rod. Magnetic blocks that cooperate with each other are respectively arranged on the bottom surface of the guide rod and the bottom wall of the guide hole. And the momentary switch one is fixedly connected to the top wall of the cavity. A connecting rod extending out of the vertical seat is fixedly arranged on the telescopic cylinder. A mating rod for pushing the connecting rod to act is arranged on the positioning seat.

[0008] As an improvement, the paint spraying assembly one includes rotating shafts respectively arranged at the four corners of the top seat and the bottom seat. Synchronous wheels are respectively arranged on the four rotating shafts in the same horizontal plane. A synchronous belt is wound around the four synchronous wheels together. Pulleys are respectively arranged on the four rotating shafts in another horizontal plane. A guide rope is wound around the four pulleys together; Mounting seats are jointly arranged on the outer side surfaces of the synchronous belt and the guide rope. A spraying pipe one communicated with an external paint source is arranged on the inner side surface of the mounting seat, and a plurality of spraying heads one are evenly arranged on this spraying pipe one. One of the rotating shafts is driven by a motor.

[0009] As an improvement, the paint spraying assembly two includes a movable seat that is slidably arranged on the vertical seat and has a square structure with a loop. An installation groove with a loop structure is formed on the outer wall of the movable seat, and a spraying pipe two is arranged in this installation groove. A plurality of spraying heads two are equidistantly arranged along the circumferential direction of the spraying pipe two. A through pipe two connected to a transmission pipe of an external paint source is arranged at the central position of the bottom surface of the spraying pipe two.

[0010] As an improvement, connecting seats are arranged on the inner walls at both ends of the movable seat. An adjusting screw rod that is in threaded cooperation with the connecting seat is rotatably arranged on the vertical seat.

[0011] As an improvement, groove bodies are formed at the upper and lower ends of the vertical seat. Slide rods that slide on the groove bodies are staggeredly arranged on the shielding seats at both ends. Limit plates are arranged on the slide rods. Compression springs are sleeved on the slide rods between the limit plates and the inner walls of the groove bodies.

[0012] As an improvement, the contraction control of the electric cylinder is carried out by stepping on a foot pedal. Hinge seats are respectively arranged at both ends of the base. A swing arm with a rebound function is hinged on the hinge seat, and a foot pedal is connected to the swing arm. A swing seat is arranged at the end of the swing arm far from the foot pedal. A movable rod sliding with the base is hinged on the swing seat. A connection groove is formed in the base corresponding to the movable rod, and a point switch two for cooperating with the movable rod and controlling the contraction of the electric cylinder is arranged on the top wall of the connection groove.

[0013] The beneficial effects of the present invention compared with the prior art are as follows: 1. Under the action of the elastically arranged shielding seat, the upper shell and the lower shell can be positioned while effectively shielding and protecting their non-spraying areas, thus improving the preparation work before spraying of the device. 2. Under the action of the sliding of the shielding seat, the electric cylinder can be driven to perform an elongation operation, and then the positioning seats at both ends can be driven to perform relative sliding to fix the upper shell and the lower shell, thus improving the operation convenience when positioning the upper shell and the lower shell. 3. Under the action of the mounting seat and the spraying pipe one sliding along the circumferential direction of the upper shell and the lower shell, the outer surfaces of the positioned upper shell and lower shell can be synchronously painted, thus improving the painting efficiency of the device. 4. Under the action of the sliding movable seat and the spraying pipe two, the inner walls of the positioned upper shell and lower shell can be synchronously painted, thus improving the painting comprehensiveness of the device. Description of the Drawings

[0014] Figure 1 is the structural schematic diagram of the present invention Figure 1 ; Figure 2 is the structural schematic diagram of the present invention Figure 2 ; Figure 3 is the split structure diagram of the upper shell and the lower shell of the present invention; Figure 4 is the internal structure diagram of the control component of the present invention; Figure 5 is the present invention Figure 4 the enlarged view of part A in; Figure 6 is the structural schematic diagram of the painting component one and the painting component two of the present invention; Figure 7 is the structural schematic diagram of controlling the telescopic of the electric cylinder of the present invention; Figure 8 is the structural schematic diagram of the shielding seat of the present invention.

[0015] As shown in the figure: 1. Placing rack; 111. Top seat; 112. Base; 113. Vertical seat; 114. Groove body; 115. Support leg; 211. Shielding seat; 212. Slide bar; 213. Limiting plate; 214. Compression spring; 3. Positioning component; 311. Positioning seat; 312. Electric cylinder; 313. Hinge seat; 314. Swing arm; 315. Swing seat; 316. Movable rod; 317. Connecting groove; 318. Push-button switch II; 319. Foot pedal; 4. Control component; 411. Push-button switch I; 412. Wedge-shaped seat; 413. Cavity; 414. Partition board; 415. Moving rod; 416. Fitting seat; 417. Telescopic cylinder; 418. Guide rod; 419. Guide hole; 420. Spring; 421. Connecting rod; 422. Fitting rod; 5. Paint spraying component I; 511. Rotating shaft; 512. Synchronous pulley; 513. Synchronous belt; 514. Mounting seat; 515. Paint spraying pipe I; 516. Paint spraying head I; 517. Rotating joint body; 518. Through pipe I; 519. Motor; 520. Pulley; 521. Guide rope; 6. Paint spraying component II; 611. Moving seat; 612. Paint spraying pipe II; 613. Paint spraying head II; 614. Through pipe II; 615. Connecting seat; 616. Adjusting lead screw; 7. Upper shell; 8. Lower shell. Detailed implementation manner

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] Combined with the attached Figure 1 、attached Figure 3 、attached Figure 4 、attached Figure 5 、attached Figure 6 and attached Figure 8As shown in the figure, a painting device for a gearbox housing includes a placement rack 1. The placement rack 1 includes a top seat 111, a bottom seat 112, and a vertical seat 113 with a frame structure, which together form an I-shaped structure. Support legs 115 are provided on the top seat 111. At both ends of the vertical seat 113, shielding seats 211 for protecting the non-painted areas of the upper housing 7 and the lower housing 8 are elastically provided. The mating surface between the shielding seat 211 and the upper housing 7 or the lower housing 8 is adapted to the shape of the bearing seat mounting hole, and the contact surface between the shielding seat 211 and the non-painted area of the upper housing 7 or the lower housing 8 is made of rubber. The elastic connection of the shielding seat 211 can increase the tightness of the contact with the surface of the upper housing 7 or the lower housing 8. A positioning component 3 for fixing the upper housing 7 and the lower housing 8 is also provided. The positioning component 3 includes inverted L-shaped positioning seats 311 that are respectively located at both ends of the upper housing 7 and the lower housing 8 and slide relatively or away from each other on the top seat 111 and the bottom seat 112. The sliding adjustment of the positioning seat 311 is carried out by the telescopic movement of the electric cylinder 312. In order to prevent water-based paint from spraying onto the telescopic end of the electric cylinder 312 during painting, an elastic rubber sleeve is sleeved outside the telescopic end of the electric cylinder 312. In order to ensure the synchronous operation of the electric cylinders 312 at the upper and lower ends on the same side, the telescopic control of the electric cylinders 312 at the upper and lower ends on the same side is set in series; A control component 4 for controlling the start, elongation, and stop of the electric cylinder 312 is provided on the vertical seat 113. When the upper housing 7 and the lower housing 8 abut against and push the shielding seat 211, it drives the control component 4 to act and triggers the momentary contact switch one 411 for controlling the elongation operation of the electric cylinder 312. The momentary contact switch one 411 is a product of the prior art, with a model of 22b-11 momentary contact switch. When the positioning of the upper housing 7 and the lower housing 8 by the positioning seat 311 is completed, it drives the control component 4 to act and separate from the momentary contact switch one 411, and the electric cylinder 312 stops operating; A painting component one 5 and a painting component two 6 for painting the outer side and the inner side of the upper housing 7 and the lower housing 8 are provided on the placement rack 1.

[0018] With the above structure, the staff first hold the upper housing 7 or the lower housing 8 with both hands and install it on the vertical seat 113. When installing, place the end of the mating surface of the upper housing 7 or the lower housing 8 at the position coinciding with the shielding seat 211 and perform a butting and pushing operation on the shielding seat 211. While pushing the shielding seat 211, drive the control component 4 to act and trigger the first push-button switch 411, then drive the electric cylinder 312 to extend, and at the same time drive the positioning seats 311 at both ends to perform a relative sliding operation to clamp and position the upper and lower ends of the upper housing 7 or the lower housing 8. When the positioning seats 311 complete the positioning of the upper housing 7 or the lower housing 8 and reach the positioning completed state, it will drive the control component 4 to act again to separate from the first push-button switch 411 and control the electric cylinder 312 to stop acting, which can increase the convenience of controlling the action of the electric cylinder 312. Finally, spray the outer and inner sides of the upper housing 7 and the lower housing 8 through the first spraying component 5 and the second spraying component 6, improving the spraying efficiency of the device.

[0019] Combined with the attached Figure 2 , attached Figure 4 , attached Figure 5 and attached Figure 7 As shown, the control component 4 includes a wedge-shaped seat 412 provided on the shielding seat 211. A cavity 413 is opened on the vertical seat 113 corresponding to the wedge-shaped seat 412, and a partition 414 is provided in the cavity 113. A movable rod 415 with a resilient function is inserted through the partition 414. A mating seat 416 adapted to the wedge-shaped seat 412 is provided on the bottom surface of the movable rod 415, and a sliding telescopic cylinder 417 is sleeved on the top surface. A guide rod 418 is fixedly provided on the top wall of the telescopic cylinder 417, and a spring 420 is sleeved on the guide rod 418. The elastic force of the spring 420 is greater than the thrust when pushing the first push-button switch 411. A guide hole 419 for the guide rod 418 to extend into is opened on the movable rod 415. Magnetic blocks that cooperate with each other are respectively provided on the bottom surface of the guide rod 418 and the bottom wall of the guide hole 419. When the two magnetic blocks approach, they attract each other, and the first push-button switch 411 is fixedly connected to the top wall of the cavity 413. A connecting rod 421 that extends out of the vertical seat 113 is fixedly provided on the telescopic cylinder 417. An avoidance groove for the connecting rod 421 to slide up and down is opened on the vertical seat 113. A mating rod 422 with an inverted L-shaped structure for pushing the connecting rod 421 to act is provided on the positioning seat 311; The contraction control of the electric cylinder 312 is carried out by stepping on the foot pedal 319. Hinge seats 313 are respectively arranged at both ends of the base 112 corresponding to the upper housing 7 and the lower housing 8. A swing arm 314 with a rebound function is hinged on the hinge seat 313, and the foot pedal 319 is connected to this swing arm 314. The middle part of the swing arm 314 is hinged on the hinge seat 313 through a half shaft, and a torsion spring is wound around the half shaft. Under the action of the torsion spring, the swing arm 314 has the function of rebounding. A swing seat 315 is arranged at the end of the swing arm 314 far from the foot pedal 319. A movable rod 316 sliding with the base 112 is hinged on the swing seat 315. A connection groove 317 is formed in the base 112 corresponding to the movable rod 316, and a momentary switch two 318 cooperating with the movable rod 316 and controlling the contraction of the electric cylinder 312 is arranged on the top wall of the connection groove 317. The momentary switch two 318 is a prior art product, and the model is 22b-11 momentary switch.

[0020] The working principle of the control assembly 4 is as follows. In the initial state, the telescopic cylinder 417 is fully extended on the moving rod 415. When installing the upper housing 7 or the lower housing 8, the upper housing 7 or the lower housing 8 is clamped on the shielding seat 211 and this shielding seat 211 is pushed to act. The inward sliding of the shielding seat 211 drives the wedge-shaped seat 412 and the mating seat 416 to cooperate, which will drive the moving rod 415 and the telescopic cylinder 417 to slide upward, so that the top of the telescopic cylinder 417 pushes the momentary switch one 411 to act, and then controls the electric cylinder 312 to start the elongation operation. Then it drives the positioning seat 311 to slide downward, and at the same time drives the mating rod 422 to slide downward. When the positioning seat 311 positions the upper housing 7 or the lower housing 8 and reaches the positioning completed state, the mating rod 422 will push the connecting rod 421 to slide downward, and then drive the telescopic cylinder 417 to slide downward on the moving rod 415 and fix the two through the cooperation of two magnetic blocks, so that the telescopic cylinder 417 is separated from the momentary switch one 411. At this time, the electric cylinder 312 will stop operating, and the positioning of the upper housing 7 or the lower housing 8 is completed; When disassembling the upper housing 7 or the lower housing 8 after the painting is completed, the staff holds the upper housing 7 or the lower housing 8 with both hands, and then steps on the foot pedal 319 downward with the foot to drive the swing seat 315 to swing. At this time, the movable rod 316 will slide upward on the base 112. The upward sliding of the movable rod 316 triggers the momentary switch two 318. At this time, the electric cylinder 312 will contract, driving the positioning seat 311 to slide upward. At the same time, the cooperating rod 422 will move upward accordingly, releasing the abutting force on the connecting rod 421. Due to the action of the two magnets, the telescopic cylinder 417 is in a contracted state on the moving rod 415. At this time, the telescopic cylinder 417 and the momentary switch one 411 will always be separated. After the upper housing 7 or the lower housing 8 is removed from the vertical seat 113, the abutting force on the shielding seat 211 is released, and the shielding seat 211 will slide back to its original position and separate the wedge-shaped seat 412 and the cooperating seat 416. At this time, the moving rod 415 will move downward. During the movement, the telescopic cylinder 417 will be blocked by the partition plate 414, causing the telescopic cylinder 417 to separate from the moving rod 415 and reset to its initial extended state for convenient use next time.

[0021] Combined with the attached Figure 2 and the attached Figure 6 As shown, in order to ensure the synchronous painting operation on the outer sides of the upper housing 7 and the lower housing 8, the painting assembly one 5 includes rotating shafts 511 respectively located at the four corners of the upper housing 7 and the lower housing 8 and rotatably arranged on the top seat 111 and the base 112. Synchronous pulleys 512 are respectively provided on the four rotating shafts 511 on the same horizontal plane. A synchronous belt 513 adapted to them is commonly wound around the four synchronous pulleys 512. Pulleys 520 are respectively provided on the four rotating shafts 511 on another horizontal plane. A guide rope 521 is commonly wound around the four pulleys 520; Mounting seats 514 are commonly provided on the outer sides of the synchronous belt 513 and the guide rope 521. A spraying pipe one 515 is provided on the inner side of the mounting seat 514, and a plurality of spraying heads one 516 are equidistantly provided in the axial direction of the spraying pipe one 515. A rotating joint body 517 connected to the transfer pipe of the external paint source is provided at the center position of the bottom surface of the base 112. A through pipe one 518 connected to the spraying pipe one 515 is provided on the rotating joint body 517. Any one of the rotating shafts 511 is connected to the output shaft of the motor 519.

[0022] The working principle of the first paint spraying assembly 5: Start the external paint spraying pump to convey the water-based paint into the transfer pipe, and then through the rotating joint body 517, it is conveyed to the first through pipe 518 and the first spraying pipe 515, and then sprayed out from the first spraying head 516 to spray the outer sides of the upper shell 7 and the lower shell 8. At the same time, start the motor 519 to drive the rotating shaft 511 and the synchronous pulley 512 to rotate, and then drive the synchronous belt 513 to slide along the circumferential direction of the upper shell 7 and the lower shell 8, and at the same time drive the first spraying pipe 515 to slide along the circumferential direction of the upper shell 7 and the lower shell 8, so as to perform synchronous paint spraying on the outer sides of the upper shell 7 and the lower shell 8.

[0023] Combined with the attached Figure 6 As shown in the figure, the second paint spraying assembly 6 includes a moving seat 611 slidably arranged on the vertical seat 113 and having a square structure. An installation groove with a square structure is formed on the outer wall of the moving seat 611, and a second spraying pipe 612 is arranged in this installation groove. A plurality of second spraying heads 613 are equidistantly arranged along the circumferential direction of the second spraying pipe 612. A second through pipe 614 connected to the transfer pipe of the external paint source is arranged at the center of the bottom surface of the second spraying pipe 612; Connecting seats 615 are arranged on the inner walls at both ends of the moving seat 611. An adjusting screw rod 616 threadedly matched with the connecting seats 615 is rotatably arranged on the vertical seat 113. In order to avoid the phenomenon of spraying on the adjusting screw rod 616 during the paint spraying process, rubber sleeves with telescopic functions sleeving the adjusting screw rod 616 are respectively arranged at both ends between the vertical seat 113 and the connecting seats 615. A turntable is arranged outside the adjusting screw rod 616, and a plurality of air holes communicating with the outside are also formed on the vertical seat 113.

[0024] The working principle of the second paint spraying assembly 6: Convey the external water-based paint source into the transfer pipe, and then through the second through pipe 614, it is conveyed into the second spraying pipe 612, and then under the action of a plurality of second spraying heads 613, the inner walls of the upper shell 7 and the lower shell 8 are simultaneously sprayed. During the paint spraying process, rotate the adjusting screw rod 616. Under the action of the thread force, drive the moving seat 611 to slide, and then drive the second spraying pipe 612 to move, so as to perform comprehensive paint spraying on the inner walls of the upper shell 7 and the lower shell 8, improving the paint spraying comprehensiveness of the device.

[0025] Combined with the attached Figure 4 As shown in the figure, in order to enable the shielding seat 211 to have a stable elastic function, groove bodies 114 are formed at the upper and lower ends of the vertical seat 113. The shielding seats 211 at both ends are provided with sliding rods 212 sliding on the groove bodies 114 in a staggered manner. A limiting plate 213 is arranged on the sliding rods 212. A compression spring 214 is sleeved on the sliding rods 212 between the limiting plate 213 and the inner wall of the groove body 114. Under the action of the compression spring 214, the elastic function of the shielding seat 211 is ensured.

[0026] In the specific implementation of the present invention, first, the staff holds the upper housing 7 or the lower housing 8 with both hands and docks the non-sprayed end thereof on the shielding seat 211. Under the action of pushing the shielding seat 211, the control component 4 is triggered to act, driving the electric cylinder 312 to extend, and then driving the positioning seats 311 at both ends to slide relative to each other to position the upper housing 7 or the lower housing 8. After the positioning of the upper housing 7 or the lower housing 8 by the positioning seats 311 is completed, the control component 4 is triggered again to stop the operation of the electric cylinder 312. Then, the outer side and the inner wall of the upper housing 7 and the lower housing 8 are simultaneously sprayed by the first spraying component 5 and the second spraying component 6, thereby improving the spraying efficiency of the device. When it is necessary to disassemble the upper housing 7 and the lower housing 8 after spraying, the staff holds the upper housing 7 or the lower housing 8 with both hands, and then steps on the foot pedal 319 downward with the foot to drive the swing seat 315 to swing. At this time, the movable rod 316 will slide upward on the base 112. The upward sliding of the movable rod 316 triggers the momentary switch two 318. At this time, the electric cylinder 312 will contract, driving the positioning seat 311 to slide upward to release the positioning of the upper housing 7 and the lower housing 8, thereby improving the operation convenience of the device.

[0027] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and without departing from the gist of the present invention, without creatively designing a structural manner and an embodiment similar to the technical solution, they shall fall within the protection scope of the present invention.

Claims

1. A paint spraying device for a gearbox housing, comprising a placement rack (1), the placement rack (1) including a top seat (111), a bottom seat (112) and a vertical seat (113) with a frame structure, and jointly forming an I-shaped structure, characterized in that: At both ends of the vertical seat (113), there are respectively elastically provided with shielding seats (211) for protecting the non-painted areas of the upper shell (7) and the lower shell (8), and a positioning component (3) for fixing the upper shell (7) and the lower shell (8) is also provided. The positioning component (3) includes positioning seats (311) which are respectively located at both ends of the upper shell (7) and the lower shell (8) and slide relatively or away from each other on the top seat (111) and the bottom seat (112). The sliding adjustment of the positioning seat (311) is carried out by the telescopic movement of the electric cylinder (312). On the vertical seat (113), there is a control component (4) for controlling the start, elongation and stop of the electric cylinder (312). When the upper shell (7) and the lower shell (8) abut against and push the shielding seat (211), it drives the control component (4) to act and trigger the first momentary switch (411) for controlling the electric cylinder (312) to elongate. When the positioning of the upper shell (7) and the lower shell (8) by the positioning seat (311) is completed, it then drives the control component (4) to act and separate from the first momentary switch (411) to stop the electric cylinder (312) from acting. On the placement rack (1), there are a first spraying component (5) and a second spraying component (6) for spraying the outer side and the inner side of the upper shell (7) and the lower shell (8).

2. The gearbox housing painting device according to claim 1, characterized in that: The control component (4) includes a wedge-shaped seat (412) provided on the shielding seat (211). A cavity (413) is opened on the vertical seat (113) corresponding to the wedge-shaped seat (412), and a partition plate (414) is provided in this cavity (413). A moving rod (415) with a rebounding function is inserted through the partition plate (414). A mating seat (416) adapted to the wedge-shaped seat (412) is provided on the bottom surface of the moving rod (415), and a sliding telescopic cylinder (417) is sleeved on the top surface. A guide rod (418) is fixed on the top wall of the telescopic cylinder (417), and a spring (420) is sleeved on this guide rod (418). A guide hole (419) for the guide rod (418) to extend into is opened on the moving rod (415). Magnetic blocks that cooperate with each other are respectively provided on the bottom surface of the guide rod (418) and the bottom wall of the guide hole (419). The first momentary switch (411) is fixedly connected to the top wall of the cavity (413). A connecting rod (421) that extends out of the vertical seat (113) is fixed on the telescopic cylinder (417). A mating rod (422) for driving the connecting rod (421) to act is provided on the positioning seat (311).

3. The gearbox housing painting device according to claim 1 or 2, characterized in that: The first spraying component (5) includes rotating shafts (511) respectively arranged at the four corners of the top seat (111) and the bottom seat (112). Synchronous wheels (512) are respectively provided on the four rotating shafts (511) on the same horizontal plane. A synchronous belt (513) is wound around the four synchronous wheels (512) together. Rotating shafts (511) are respectively provided on the four rotating shafts (511) on another horizontal plane. A guide rope (521) is wound around the four rotating shafts (520) together. A mounting seat (514) is provided on the outer sides of the synchronous belt (513) and the guide rope (521). On the inner side of the mounting seat (514), a first spraying pipe (515) communicating with an external paint source is provided, and a plurality of first spraying heads (516) are evenly arranged on the first spraying pipe (515). One of the rotating shafts (511) is driven by a motor (519).

4. The gearbox housing painting device according to claim 1 or 2, characterized in that: The second paint spraying assembly (6) includes a moving seat (611) slidably arranged on the vertical seat (113) and having a rectangular structure. An installation groove with a rectangular structure is formed on the outer wall of the moving seat (611), and a second spraying pipe (612) is arranged in the installation groove. A plurality of second spraying heads (613) are arranged at equal intervals along the circumferential direction of the second spraying pipe (612). A through pipe two (614) connected to a transfer pipe of an external paint source is provided at the center of the bottom surface of the second spraying pipe (612).

5. The paint spraying device for the gearbox housing according to claim 4, characterized in that: Connection seats (615) are provided on the inner walls at both ends of the moving seat (611), and an adjusting screw rod (616) in threaded cooperation with the connection seats (615) is rotatably arranged on the vertical seat (113).

6. The gearbox housing painting device according to claim 1, characterized in that: Groove bodies (114) are formed at the upper and lower ends of the vertical seat (113). Slide rods (212) sliding on the groove bodies (114) are staggeredly arranged on the shielding seats (211) at both ends. Limit plates (213) are arranged on the slide rods (212), and compression springs (214) are sleeved on the slide rods (212) between the limit plates (213) and the inner walls of the groove bodies (114).

7. The paint spraying device for the gearbox housing according to claim 1, wherein: The contraction control of the electric cylinder (312) is carried out by stepping on a foot pedal (319). Hinge seats (313) are respectively arranged at both ends of the base (112). A swing arm (314) with a rebound function is hinged on the hinge seats (313), and the foot pedal (319) is connected to the swing arm (314). A swing seat (315) is arranged at the end of the swing arm (314) away from the foot pedal (319). A movable rod (316) sliding with the base (112) is hinged on the swing seat (315). A connection groove (317) is formed in the base (112) corresponding to the movable rod (316), and a momentary switch two (318) cooperating with the movable rod (316) and controlling the contraction of the electric cylinder (312) is arranged on the top wall of the connection groove (317).

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