Machining device and machining method for integrally cast axle housing

Abstract

The invention relates to the technical field of axle housing machining, and particularly discloses a machining device and method for an integrally cast axle housing, the machining device comprises a machining bin and an axle housing body, and further comprises a stirring bin arranged at the bottom of the machining bin and used for stirring coating; the spraying mechanisms are arranged in the machining bin, located on the two sides of the machining bin and used for spraying the axle housing body; through the arrangement of the rotating mechanism, the spraying box can be driven to move up and down, uniform spraying of the axle housing body is achieved, the spraying box is driven to move left and right in a reciprocating mode through a planetary gear while moving up and down, all faces of the axle housing body are sprayed during reciprocating movement, the situation that spraying is not uniform again is avoided, and the spraying efficiency is improved. And a stirring shaft in the stirring bin is further driven by the driving motor to rotate, the coating is stirred through stirring rods on the stirring shaft, and the situation that the coating precipitates, and the spraying effect is affected is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of axle housing processing, in particular to a processing device and a processing method for an integrally cast axle housing. Background Art

[0002] The axle housing is an important component of the automobile drive axle. It is the assembly base for installing the main reducer, differential, half-axles and wheels. Its main function is to support and protect the main reducer, differential and half-axles. During processing, its surface needs to be sprayed to achieve the effect of rust prevention, corrosion prevention and extend the service life of the axle housing.

[0003] Announcement No. CN219647836U discloses a drive shaft housing spraying device, comprising a housing, door panels are movably mounted on the left and right sides of the front of the housing, spray pipes are fixedly sleeved on the left and right sides of the top of the housing, and a fixed box located between the two spray pipes is fixedly sleeved on the top of the housing. The utility model is provided with a connecting plate, a tooth pressure plate, a rotating gear and a flexible spring. When the brake motor is running, the rotating gear will be rotated through the first rotating shaft. Through the cooperation between the tooth pressure plate and the rotating gear, the tooth pressure plate can be moved upward so that the connecting plate does not block the bridge housing, and when the rotating gear rotates to the gap of the teeth, the meshing effect between the tooth pressure plate and the rotating gear can be released. At this time, the flexible spring in the compressed state can push the movable housing so that the connecting plate blocks the bridge housing, thereby preventing the spray pipe from spraying into the inside of the bridge housing.

[0004] In the prior art, the above-mentioned device realizes the spraying of the bridge housing through a spray pipe, but the spray pipe is fixed in the device by a fixed structure, and the spray pipe cannot be moved during actual use, resulting in the spray pipe being able to spray only one part of the bridge housing during the spraying process. Even if a diffusion device is installed at the end of the spray pipe, the bridge housing cannot be fully covered, resulting in uneven paint on the surface of the bridge housing. Summary of the Invention

[0005] The purpose of the present invention is to provide a processing device and a processing method for an integrally cast axle housing to solve the following technical problems: (1) How to spray the bridge shell evenly.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A processing device and method for an integrally cast axle housing, comprising a processing chamber and an axle housing body, and further comprising: The mixing chamber is located at the bottom of the processing chamber and is used for mixing the coating; The spraying mechanism is arranged in the processing chamber and located on both sides of the processing chamber, and is used for spraying the axle housing body; The rotating mechanism is arranged above the mixing chamber and is used to drive the spraying mechanism to rotate; The clamping mechanism is arranged above the mixing chamber and located in the middle of the processing chamber, and is used for clamping and fixing the bridge housing body.

[0007] Furthermore, the rotating mechanism includes a driving gear; the driving gear is rotatably arranged above the stirring chamber; an outer gear ring is fixedly arranged in the external processing chamber of the driving gear; a planetary gear is meshed and connected between the outer gear ring and the driving gear; two groups of planetary gears are provided; a lifting screw is fixedly connected to the planetary gear; the spraying mechanism includes a spray box; the spray box is threadedly connected to the lifting screw.

[0008] Furthermore, a stirring shaft is rotatably connected in the stirring chamber; a stirring rod is fixedly connected to the side wall of the stirring shaft; multiple groups of stirring rods are provided; a partition is fixedly connected to the side wall of the processing chamber at the top of the stirring chamber; a driving shaft is rotatably connected to the partition; the end of the driving shaft away from the partition is fixedly connected to the driving gear; the input end of the driving shaft is fixedly connected to the output end of the stirring shaft; a driving motor is fixedly connected to the bottom of the processing chamber; the driving shaft is driven by the driving motor; a slide groove is provided on the partition; the lifting screw passes through the planetary gear and is slidably connected in the slide groove.

[0009] Furthermore, a connecting hose is fixedly connected to the side wall of the spray box; and one end of the connecting hose away from the spray box is fixedly connected to the partition.

[0010] Furthermore, the clamping mechanism includes a clamping base; a connecting shaft is fixedly connected to the bottom of the clamping base; the end of the connecting shaft away from the clamping base is rotatably connected to the driving gear; a clamping groove is provided in the clamping base; a clamping screw is rotatably connected in the clamping groove; a moving block is threadedly connected to the clamping screw; two groups of moving blocks are provided; the top of the moving block is fixedly connected to the base plate; the side wall of the base plate is fixedly connected to a telescopic spring; the end of the telescopic spring away from the base plate is fixedly connected to a splint; the bridge housing body is clamped and fixed by the splint.

[0011] Furthermore, a feed pipe is fixedly connected to the side wall of the processing chamber; a valve is fixedly connected to the feed pipe; and a discharge pipe is fixedly connected to the bottom of the processing chamber.

[0012] Furthermore, the side wall of the clamping base is fixedly connected to a clamping motor; the clamping screw is driven by the clamping motor; the bottom of the processing chamber is fixedly connected to a support leg; the support legs are provided in multiple groups; the bottom of the support leg is fixedly connected to an anti-slip pad; and the top of the processing chamber is hinged with a chamber door.

[0013] A method for processing an integrally cast axle housing comprises the following steps: S1, first, the axle housing body is placed in the processing chamber, clamped and fixed by the clamping base in the processing chamber, and then the spraying work begins; S2, after the axle housing body is clamped and fixed, the stirring shaft is started to rotate. During the rotation, the stirring shaft drives the driving gear to rotate through the driving shaft, and then the planetary gear and the lifting screw drive the spray box to work and spray the axle housing body; S3, after spraying is completed, pour out the remaining paint in the mixing chamber through the discharge pipe, and then remove the bridge housing body.

[0014] Beneficial effects of the present invention: (1) The present invention can drive the spray box to move up and down by setting a rotating mechanism, so as to achieve uniform spraying of the bridge housing body. At the same time as the up and down movement, the spray box is also driven to move back and forth left and right by the planetary gear. During the reciprocating movement, each surface of the bridge housing body is sprayed to avoid the occurrence of uneven spraying. The driving motor also drives the stirring shaft in the stirring chamber to rotate, and the stirring rod on the stirring shaft is used to stir the paint to avoid the paint from settling and affecting the spraying effect.

[0015] (2) The arrangement of the clamping base of the present invention can achieve the clamping and fixing of the bridge housing body, and the arrangement of the telescopic spring can further fix the bridge housing body, and the rebound of the telescopic spring can protect the bridge housing body, avoiding damage to the appearance of the bridge housing body during hard clamping. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 It is a schematic diagram of the overall structure of the processing chamber in the present invention; Figure 2 It is a schematic diagram of the overall structure of the feed pipe in the present invention; Figure 3 It is a cross-sectional view of the overall structure of the processing chamber in the present invention; Figure 4 It is a schematic diagram of the overall structure of the rotating mechanism and the spraying mechanism in the present invention; Figure 5 It is a schematic diagram of the overall structure of the clamping base in the present invention; Figure 6 This is a cross-sectional view of the overall structure of the clamping base in the present invention; Figure 7 It is a schematic diagram of the overall structure of the partition in the present invention.

[0018] Description of the drawings: 1. Processing chamber; 11. Mixing chamber; 111. Feed pipe; 112. Valve; 113. Discharge pipe; 12. Drive motor; 13. Mixing shaft; 14. Mixing rod; 15. Partition; 151. Slide; 2. Rotating mechanism; 21. Drive shaft; 22. Drive gear; 23. Outer gear ring; 24. Planetary gear; 25. Lifting screw; 3. Spraying mechanism; 31. Spray box; 32. Connecting hose; 4. Clamping mechanism; 41. Clamping base; 411. Connecting shaft; 42. Clamping groove; 43. Clamping screw; 44. Moving block; 45. Bottom plate; 46. Telescopic spring; 47. Clamping plate; 48. Clamping motor; 5. Bridge housing body; 6. Support leg; 61. Anti-slip pad; 7. Warehouse door. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 7 As shown, the present application provides a processing device and a processing method for an integrally cast axle housing, comprising a processing chamber 1 and an axle housing body 5, and further comprising: A stirring chamber 11 is provided at the bottom of the processing chamber 1 and is used for stirring the coating; The spraying mechanism 3 is provided in the processing chamber 1 and is located on both sides of the processing chamber 1 for spraying the axle housing body 5; The rotating mechanism 2 is arranged above the stirring chamber 11 and is used to drive the spraying mechanism 3 to rotate; The clamping mechanism 4 is provided above the mixing chamber 11 and located in the middle of the processing chamber 1, and is used for clamping and fixing the axle housing body 5; During operation, in the prior art, the above-mentioned device realizes the spraying of the bridge housing through a spray pipe, but the spray pipe is fixed in the device with a fixed structure, and the spray pipe cannot be moved during actual use, resulting in the spray pipe being able to only spray one part of the bridge housing during the spraying process. Even if a diffusion device is installed at the end of the spray pipe, the bridge housing cannot be fully covered, resulting in uneven paint on the surface of the bridge housing. In order to prevent such incidents from happening, the bridge housing body 5 is first placed in the processing chamber 1, and the bridge housing body 5 is fixed by the clamping mechanism 4. Then, the rotating mechanism 2 above the stirring chamber 11 is driven to rotate. When rotating, the rotating mechanism 2 will drive the spray mechanism 3 to rotate on both sides of the bridge housing body 5. The bridge housing body 5 is sprayed by rotating, which can fully cover the bridge housing body 5 and avoid uneven spraying of the bridge housing body 5 during the spraying process.

[0021] like Figure 3 and Figure 4 As shown, the rotating mechanism 2 includes a driving gear 22; the driving gear 22 is rotatably arranged above the mixing chamber 11; an outer gear ring 23 is fixedly arranged outside the driving gear 22 in the processing chamber 1; a planetary gear 24 is meshed and connected between the outer gear ring 23 and the driving gear 22; the planetary gears 24 are provided in two groups; a lifting screw 25 is fixedly connected to the planetary gear 24; the spraying mechanism 3 includes a spray box 31; the spray box 31 is threadedly connected to the lifting screw 25; During operation, the spray box 31 in the spray mechanism 3 is threadedly connected to the lifting screw 25. When spraying, the driving gear 22 in the rotating mechanism 2 is first driven to rotate. When rotating, the planetary gear 24 engaged with the outer ring gear 23 is driven to rotate through the teeth on the driving gear 22. When the planetary gear 24 rotates, it will move in the gap between the driving gear 22 and the outer ring gear 23, and at the same time drive the lifting screw 25 to rotate. When the lifting screw 25 rotates, it will drive the spray box 31 to move up and down. While moving up and down, the planetary gear 24 drives the spray box 31 to move on both sides of the bridge housing body 5, thereby realizing all-round spraying of the bridge housing body 5.

[0022] like Figure 3-Figure 7 As shown, a stirring shaft 13 is rotatably connected in the stirring chamber 11; a stirring rod 14 is fixedly connected to the side wall of the stirring shaft 13; a plurality of stirring rods 14 are provided; a partition 15 is fixedly connected to the side wall of the processing chamber 1 at the top of the stirring chamber 11; a driving shaft 21 is rotatably connected to the partition 15; the end of the driving shaft 21 away from the partition 15 is fixedly connected to the driving gear 22; the input end of the driving shaft 21 is fixedly connected to the output end of the stirring shaft 13; a driving motor 12 is fixedly connected to the bottom of the processing chamber 1; the driving shaft 21 is driven by the driving motor 12; a slide groove 151 is opened on the partition 15; the lifting screw 25 passes through the planetary gear 24 and is slidably connected in the slide groove 151; During operation, the drive motor 12 is set to be reciprocating drive, and the driving motor 12 drives the stirring shaft 13 to rotate. When rotating, the stirring shaft 13 drives the stirring rod 14 to rotate, which can stir the paint in the stirring chamber 11 to prevent the paint from settling. When the stirring shaft 13 rotates, it drives the drive shaft 21 to rotate, thereby driving the drive gear 22 and the spray box 31 to work, and the drive motor 12 is reciprocating drive, that is, half-rotation, driving the two sets of spray boxes 31 to rotate half a circle is a full circle, thereby covering the bridge housing body 5, and when rotating, the bottom of the lifting screw 25 slides in the slide groove 151 to prevent the lifting screw 25 from shaking during rotation, causing the planetary gear 24 to get stuck.

[0023] like Figure 3As shown, a connecting hose 32 is fixedly connected to the side wall of the spray box 31; one end of the connecting hose 32 away from the spray box 31 is fixedly connected to the partition 15; During operation, the connecting hose 32 is a telescopic hose. When the spray box 31 rotates, the connecting hose 32 can be pulled, and half-rotation can prevent the connecting hose 32 from being entangled, and the paint can reach the spray box 31 through the connecting hose 32.

[0024] like Figure 6 As shown, the clamping mechanism 4 includes a clamping base 41; a connecting shaft 411 is fixedly connected to the bottom of the clamping base 41; the end of the connecting shaft 411 away from the clamping base 41 is rotatably connected to the driving gear 22; a clamping groove 42 is formed in the clamping base 41; a clamping screw 43 is rotatably connected in the clamping groove 42; a moving block 44 is threadedly connected to the clamping screw 43; two groups of moving blocks 44 are provided; a bottom plate 45 is fixedly connected to the top of the moving block 44; a telescopic spring 46 is fixedly connected to the side wall of the bottom plate 45; a clamping plate 47 is fixedly connected to the end of the telescopic spring 46 away from the bottom plate 45; the bridge housing body 5 is clamped and fixed by the clamping plate 47; During operation, before the spraying work begins, the bridge housing body 5 needs to be fixed. When fixing, the bridge housing body 5 is erected in the processing chamber 1, and one end of the bridge housing body 5 is placed on the clamping base 41. Then, the clamping screw 43 in the clamping base 41 is driven to rotate. During rotation, the clamping screw 43 drives the two sets of moving blocks 44 to move toward the bridge housing body 5. While moving, the splint 47 is fitted with the bridge housing body 5. After fitting, the splint 47 is continuously driven to move. When moving again, the telescopic spring 46 will be squeezed, and the bridge housing body 5 will be further clamped by the rebound of the telescopic spring 46. After clamping, the spraying work starts.

[0025] like Figure 2 As shown, a feed pipe 111 is fixedly connected to the side wall of the processing chamber 1; a valve 112 is fixedly connected to the feed pipe 111; and a discharge pipe 113 is fixedly connected to the bottom of the processing chamber 1; During operation, the paint enters the mixing chamber 11 through the feed pipe 111, and the valve 112 can control the opening and closing of the feed pipe 111. When the mixing chamber 11 needs to be cleaned after spraying, the remaining paint can be discharged through the discharge pipe 113 to avoid long-term deposition and deterioration of the paint.

[0026] like Figure 5 As shown, the side wall of the clamping base 41 is fixedly connected to the clamping motor 48; the clamping screw 43 is driven by the clamping motor 48; the bottom of the processing chamber 1 is fixedly connected to the support leg 6; the support leg 6 is provided with multiple groups; the bottom of the support leg 6 is fixedly connected to the anti-slip pad 61; the top of the processing chamber 1 is hinged with a chamber door 7 During operation, the clamping motor 48 can drive the clamping screw 43 to rotate, and then the bridge housing body 5 can be clamped and fixed by the clamping plate 47. The support leg 6 can alleviate the shaking of the processing chamber 1 during processing. The anti-slip pad 61 can prevent the support leg 6 from slipping, and the chamber door 7 can be closed after the spraying work starts to prevent the paint from flying out of the processing chamber 1.

[0027] See also Figure 1-Figure 7 As shown, the present application provides a method for processing an integrally cast bridge housing, comprising the following steps: S1, first, the axle housing body 5 is placed in the processing chamber 1, clamped and fixed by the clamping base 41 in the processing chamber 1, and then the spraying work is started; S2, after the axle housing body 5 is clamped and fixed, the stirring shaft 13 is started to rotate. During the rotation, the stirring shaft 13 drives the driving gear 22 to rotate through the driving shaft 21, and then the planetary gear 24 and the lifting screw 25 drive the spray box 31 to work, spraying the axle housing body 5; S3, after spraying is completed, the remaining paint in the mixing chamber 11 is poured out through the discharge pipe 113, and then the axle housing body 5 is removed; During operation, first, the bridge housing body 5 is placed in the processing chamber 1, and clamped and fixed by the clamping base 41 in the processing chamber 1, and then the spraying work is started. After the bridge housing body 5 is clamped and fixed, the stirring shaft 13 is started to rotate. During rotation, the stirring shaft 13 drives the driving gear 22 to rotate through the driving shaft 21, and then the planetary gear 24 and the lifting screw 25 are used to drive the spray box 31 to work, and the bridge housing body 5 is sprayed. After the spraying is completed, the remaining paint in the stirring chamber 11 is poured out through the discharge pipe 113, and then the bridge housing body 5 is removed.

[0028] Working principle of the present invention: In the prior art, the above-mentioned device realizes the spraying of the bridge housing through a spray pipe, but the spray pipe is fixed in the device with a fixed structure. The spray pipe cannot be moved during actual use, resulting in the spray pipe being able to only spray one part of the bridge housing during the spraying process. Even if a diffusion device is installed at the end of the spray pipe, the bridge housing cannot be fully covered, resulting in uneven paint on the surface of the bridge housing. In order to prevent such incidents from happening, the bridge housing body 5 is first placed in the processing chamber 1, and the bridge housing body 5 is fixed by the clamping mechanism 4. Then, the rotating mechanism 2 above the stirring chamber 11 is driven to rotate. During rotation, the rotating mechanism 2 will drive the spray mechanism 3 to rotate on both sides of the bridge housing body 5. The bridge housing body 5 is sprayed by rotation, which can fully cover the bridge housing body 5 and avoid uneven spraying of the bridge housing body 5 during the spraying process.

[0029] Among them, the spray box 31 in the spraying mechanism 3 is threadedly connected to the lifting screw 25. When the spraying work is performed, the driving gear 22 in the rotating mechanism 2 is first driven to rotate. When rotating, the teeth on the driving gear 22 and the outer gear ring 23 drive the planetary gear 24 engaged with each other to rotate. When the planetary gear 24 rotates, it will move in the gap between the driving gear 22 and the outer gear ring 23, and at the same time drive the lifting screw 25 to rotate. When the lifting screw 25 rotates, it will drive the spray box 31 to move up and down. At the same time, the planetary gear 24 drives the spray box 31 to move on both sides of the bridge housing body 5, realizing the bridge housing body 5 is sprayed in all directions. Before the spraying work begins, the bridge housing body 5 needs to be fixed. When fixing, the bridge housing body 5 is erected in the processing chamber 1, and one end of the bridge housing body 5 is placed on the clamping base 41. Then, the clamping screw 43 in the clamping base 41 is driven to rotate. During rotation, the clamping screw 43 drives the two sets of moving blocks 44 to move toward the bridge housing body 5. While moving, the splint 47 is fitted with the bridge housing body 5. After fitting, the splint 47 is continuously driven to move. When moving again, the telescopic spring 46 will be squeezed, and the bridge housing body 5 will be further clamped by the rebound of the telescopic spring 46. After clamping, the spraying work begins.

[0030] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A processing device for integrally casting a bridge housing, comprising a processing chamber (1) and a bridge housing body (5), characterized in that: Also includes: A stirring chamber (11) is provided at the bottom of the processing chamber (1) and is used for stirring the coating; A spraying mechanism (3) is arranged in the processing chamber (1), located on both sides of the processing chamber (1), and is used for spraying the bridge housing body (5); A rotating mechanism (2) is provided above the stirring chamber (11) and is used to drive the spraying mechanism (3) to rotate; The clamping mechanism (4) is arranged above the stirring chamber (11) and located in the middle of the processing chamber (1), and is used for clamping and fixing the bridge housing body (5).

2. The processing device for integrally cast axle housing according to claim 1, characterized in that: The rotating mechanism (2) includes a driving gear (22); the driving gear (22) is rotatably arranged above the stirring chamber (11); an outer gear ring (23) is fixedly arranged in the processing chamber (1) outside the driving gear (22); a planetary gear (24) is meshed and connected between the outer gear ring (23) and the driving gear (22); two sets of planetary gears (24) are provided; a lifting screw (25) is fixedly connected to the planetary gear (24); the spraying mechanism (3) includes a spray box (31); the spray box (31) is threadedly connected to the lifting screw (25).

3. The processing device for integrally cast axle housing according to claim 2, characterized in that: A stirring shaft (13) is rotatably connected in the stirring chamber (11); a stirring rod (14) is fixedly connected to the side wall of the stirring shaft (13); a plurality of stirring rods (14) are provided; a partition (15) is fixedly connected to the side wall of the processing chamber (1) at the top of the stirring chamber (11); a driving shaft (21) is rotatably connected to the partition (15); an end of the driving shaft (21) away from the partition (15) is fixedly connected to a driving gear (22); an input end of the driving shaft (21) is fixedly connected to an output end of the stirring shaft (13); a driving motor (12) is fixedly connected to the bottom of the processing chamber (1); the driving shaft (21) is driven by the driving motor (12); a slide groove (151) is provided on the partition (15); the lifting screw (25) passes through the planetary gear (24) and is slidably connected in the slide groove (151).

4. The processing device for integrally cast axle housing according to claim 3, characterized in that: A connecting hose (32) is fixedly connected to the side wall of the spray box (31); one end of the connecting hose (32) away from the spray box (31) is fixedly connected to the partition (15).

5. The processing device for integrally cast axle housing according to claim 4, characterized in that: The clamping mechanism (4) includes a clamping base (41); a connecting shaft (411) is fixedly connected to the bottom of the clamping base (41); an end of the connecting shaft (411) away from the clamping base (41) is rotatably connected to the driving gear (22); a clamping groove (42) is provided in the clamping base (41); a clamping screw (43) is rotatably connected in the clamping groove (42); a moving block (44) is threadedly connected to the clamping screw (43); two groups of moving blocks (44) are provided; a bottom plate (45) is fixedly connected to the top of the moving block (44); a telescopic spring (46) is fixedly connected to the side wall of the bottom plate (45); an end of the telescopic spring (46) away from the bottom plate (45) is fixedly connected to a clamping plate (47); and the bridge housing body (5) is clamped and fixed by the clamping plate (47).

6. The processing device for integrally cast axle housing according to claim 5, characterized in that: A feed pipe (111) is fixedly connected to the side wall of the processing chamber (1); a valve (112) is fixedly connected to the feed pipe (111); and a discharge pipe (113) is fixedly connected to the bottom of the processing chamber (1).

7. The processing device for integrally cast axle housing according to claim 6, characterized in that: The side wall of the clamping base (41) is fixedly connected to a clamping motor (48); the clamping screw (43) is driven by the clamping motor (48); the bottom of the processing chamber (1) is fixedly connected to a supporting leg (6); the supporting leg (6) is provided in multiple groups; the bottom of the supporting leg (6) is fixedly connected to an anti-slip pad (61); and the top of the processing chamber (1) is hinged with a chamber door (7).

8. A method for processing an integrally cast bridge housing, characterized in that: The following steps are involved: S1, first, the bridge housing body (5) is placed in the processing chamber (1), clamped and fixed by the clamping base (41) in the processing chamber (1), and then the spraying work is started; S2, after the bridge housing body (5) is clamped and fixed, the stirring shaft (13) is started to rotate. During the rotation, the stirring shaft (13) drives the driving gear (22) to rotate through the driving shaft (21), and then the planetary gear (24) and the lifting screw (25) drive the spray box (31) to work, and the bridge housing body (5) is sprayed; S3, after spraying is completed, the remaining paint in the mixing chamber (11) is poured out through the discharge pipe (113), and then the bridge housing body (5) is removed.

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