Powder cleaning device and equipment for coating production line

Abstract

The invention discloses a powder cleaning device and equipment for a coating production line, the device comprises a rack, a rotating mechanism, an air blowing pipe and at least one brush, the rotating mechanism comprises a rotating seat arranged on the rack, a rotating shaft rotatably arranged on the rotating seat around an axis, and a driving assembly arranged on the rack; the air blowing pipe is arranged on the rotating shaft and extends in the vertical direction, a first air blowing part is arranged on the air blowing pipe, and at least one brush comprises a brush body arranged on the rotating shaft and located on the peripheral side of the air blowing pipe, bristles arranged on the brush body and a second air blowing part arranged on the brush body; the first air blowing part and the second air blowing part are suitable for being communicated with external air source airflow. The air blowing pipe can extend into the center hole of the workpiece and blow the center hole of the workpiece through the first air blowing part, meanwhile, bristles on the brush can clean the mounting surface of the workpiece, the bristles on the brush are cleaned through the second air blowing part, the cleaning efficiency is high, and the powder cleaning effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of powder coating, and particularly to a powder cleaning device and equipment for cleaning residual powder on the surface of a workpiece after powder coating on a coating production line. Background Art

[0002] On a coating production line, after a workpiece is sprayed with powder by a powder spraying device, a powder coating is sprayed on the surface of the workpiece. Before the workpiece with the powder coating is transferred to a baking and curing device for curing, it is often necessary to clean the residual powder coating on the surface of the workpiece so that the powder coating on the surface of the workpiece can be evenly attached to the surface of the workpiece after heating and curing, forming a paint layer that plays an anti-corrosion and protective role for the workpiece. However, after powder spraying a workpiece such as an automotive wheel hub with a central hole and a mounting surface located outside the central hole, the residual powder coating is likely to be hidden in the central hole of the workpiece and attached to the mounting surface of the workpiece, making it difficult to clean. Especially for automotive wheel hubs, after powder spraying operations, powder coatings are likely to remain in the central hole and on the mounting surface of the automotive wheel hub, and it is necessary to carefully clean the central hole and the mounting surface of the automotive wheel hub to avoid powder coating accumulation and residue on the sprayed automotive wheel hub, which affects the curing effect. Therefore, there is an urgent need for a powder cleaning device and equipment suitable for cleaning the central hole and mounting surface of a workpiece. Summary of the Invention

[0003] In order to solve the above technical problems, an object of the present invention is to provide a powder cleaning device for a coating production line and suitable for cleaning the central hole and mounting surface of a workpiece, and a powder cleaning equipment having the device.

[0004] To this end, on the one hand, the present invention provides a powder cleaning device for a coating production line, suitable for cleaning the central hole and the mounting surface located outside the central hole of a workpiece. The powder cleaning device includes: A frame; A rotating mechanism, including a rotating seat provided on the frame, a rotating shaft rotatably provided on the rotating seat around an axis, and a driving component provided on the frame and configured to drive the rotating shaft to perform a circular motion around the axis; A blowing pipe, provided on the rotating shaft and extending in the vertical direction. A first blowing portion for purging the central hole of the workpiece is provided on the blowing pipe, and the first blowing portion is configured to be in air flow communication with an external air source; At least one brush, including a brush body provided on the rotating shaft and located on the outer peripheral side of the blowing pipe, bristles provided on the brush body and configured to clean the mounting surface of the workpiece, and a second blowing portion provided on the brush body and configured to purge the bristles. The second blowing portion is configured to be in air flow communication with an external air source.

[0005] According to an embodiment of the present invention, the purifying device further includes a gas supply mechanism, and the gas supply mechanism includes a gas supply source, a first gas path, a second gas path, and a rotary joint rotatably connected to the rotary shaft. The gas supply source, the rotary joint, and the first blowing part are sequentially connected in gas flow through the first gas path, and the gas supply source, the rotary joint, and the second blowing part are sequentially connected in gas flow through the second gas path.

[0006] According to an embodiment of the present invention, the rotary shaft includes a double-layer tube formed by sleeving an inner tube and an outer tube, a support seat installed at one end of the double-layer tube, and a pipe joint installed at the other end of the double-layer tube and connected to the rotary joint.

[0007] According to an embodiment of the present invention, the internal cavity of the inner tube constitutes a part of the first gas path, and the sandwich cavity formed between the inner tube and the outer tube constitutes a part of the second gas path.

[0008] According to an embodiment of the present invention, the blow pipe is installed on the support seat and is connected to the inner tube, and the brush body is installed on the support seat and the second blowing part is in gas flow communication with the sandwich cavity.

[0009] According to an embodiment of the present invention, the outer tube is rotatably arranged on the rotary seat through a bearing, and the driving assembly includes a driving motor installed on the frame, a driving wheel installed on the output shaft of the driving motor, a driven wheel installed on the outer tube, and a transmission belt drivingly connected between the driving wheel and the driven wheel.

[0010] According to an embodiment of the present invention, the purifying device includes a plurality of brushes, and the plurality of brushes are arranged at intervals around the outer peripheral side of the rotary shaft; the rotary joint includes one of a pneumatic rotary joint, an air slip ring, an air-electric slip ring, a gas medium rotary joint, a multi-channel rotary joint, and a high-pressure rotary joint.

[0011] According to an embodiment of the present invention, the first blowing part includes blow holes or blowing nozzles opened on the pipe wall of the blow pipe, and an air flow passage communicating with the blow holes or blowing nozzles in gas flow is constructed inside the pipe wall of the blow pipe, and the air flow passage extends downward obliquely to the center line of the blow pipe; Alternatively, the first blowing part includes a blowing nozzle connected to the pipe orifice of the blow pipe, and the blowing nozzle extends toward one side inclined to the center line of the blow pipe.

[0012] According to an embodiment of the present invention, the included angle between the extending direction of the air flow passage and the center line of the blow pipe is 70° to 90°; the diameter of the air flow passage is 1.4 mm to 2 mm.

[0013] On the other hand, the present invention also provides a powder cleaning device for a painting production line, including: A dust removal device, including an inner shield disposed on the frame and covering the outside of the rotating mechanism, an outer shield disposed on the frame and covering the outside of the inner shield, a dust collection space formed by the common enclosure of the inner shield and the outer shield, an exhaust duct disposed on the frame and in air flow communication with the dust collection space, and a negative pressure source in air flow communication with the exhaust duct and configured to generate a negative pressure air flow from the dust collection space into the exhaust duct; A clamping device, including at least one clamping mechanism disposed above the frame and configured to clamp a workpiece and feed it into the dust collection space; and At least one powder cleaning device according to any one of the foregoing technical solutions.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The powder cleaning device is provided with a blowing pipe and a brush on the rotating shaft. The blowing pipe can extend into the central hole of the workpiece and purge the central hole of the workpiece through the first blowing part. At the same time, the bristles on the brush can clean the mounting surface of the workpiece, and the second blowing part is used to clean the bristles of the brush, so that the bristles are kept clean to avoid contaminating the surface of the workpiece. The powder cleaning device can simultaneously clean the central hole and the mounting surface of workpieces such as automobile wheels, with high cleaning efficiency and good powder cleaning effect.

[0015] The powder cleaning device clamps the workpiece through at least one clamping mechanism of the clamping device and feeds it into the dust collection space of the dust removal device. At least one powder cleaning device simultaneously performs powder cleaning operations on the central hole and the mounting surface of the workpiece. The dust removal device timely extracts the dust after cleaning, avoiding secondary pollution of the workpiece surface by the dust after cleaning and causing unnecessary safety hazards. The powder cleaning operation is safer and cleaner. Description of the Drawings

[0016] Figure 1 is a front perspective view of a powder cleaning device according to an embodiment of the present invention; Figure 2 is Figure 1 the air supply schematic diagram of the powder cleaning device shown in Figure 3 is Figure 1 the partial enlarged view of the A position shown in Figure 4 is Figure 1 the partial enlarged view of the B position shown in Figure 5 is Figure 1 the front perspective view of the rotating mechanism of the powder cleaning device shown in Figure 6 isFigure 3 Front perspective view of the air blowing pipe shown in Figure 7 is Figure 3 Front perspective view of the brush shown in Figure 8 is Figure 7 Side perspective view of the brush shown in Figure 9 is Figure 7 Top perspective view of the brush shown in Figure 10 is a cleaning powder device according to an embodiment of the present invention equipped with multiple Figure 1 Front perspective view of the cleaning powder device shown in Figure 11 is Figure 10 Side perspective view of the cleaning powder device shown in Figure 12 is Figure 10 Top perspective view of the cleaning powder device shown in Figure 13 is Figure 10 Front perspective view of the clamping device of the cleaning powder device shown in Figure 14 is Figure 13 Side perspective view of the clamping device shown in Figure 15 is Figure 10 Front perspective view of the dust removal device of the cleaning powder device shown in Detailed implementation manners

[0017] It is easily understandable that according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can propose various replaceable structural ways and implementation manners. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0018] In a painting production line, after the surface of an automotive wheel hub is powder sprayed, before being grabbed and transferred to a baking line for baking and curing by a robot or a manipulator, it is necessary to perform a cleaning powder operation on the center hole 201 and the mounting surface 202 of the automotive wheel hub to avoid powder coating residues in the center hole 201 and on the mounting surface 202 of the automotive wheel hub, which may affect the subsequent curing effect. An embodiment of the present invention takes the cleaning powder of the center hole 201 and the mounting surface 202 of an automotive wheel hub as an example to specifically illustrate the structural composition and principle of the cleaning powder device and equipment. In other embodiments, the workpiece 200 to be cleaned of powder is not limited to an automotive wheel hub, but may also be other workpieces 200 having a center hole 201 and a mounting surface 202, such as gears, pulleys, flanges, etc., without specific limitation.

[0019] According to Figure 1 As shown in the figure, the powder cleaning device includes a frame 11, a rotating mechanism 12, a blowing pipe 13 and a brush 14. The rotating mechanism 12 includes a rotating seat 121 arranged on the frame 11, a rotating shaft 122 rotatably arranged on the rotating seat 121 around an axis line, and a driving assembly 123 arranged on the frame 11 and configured to drive the rotating shaft 122 to make a circular motion around the axis line. The blowing pipe 13 is arranged on the rotating shaft 122 and extends in the up and down direction. A first blowing part 131 for purging the central hole 201 of the workpiece 200 is arranged on the blowing pipe 13. The brush 14 includes a brush body 141 arranged on the rotating shaft 122 and located on the outer peripheral side of the blowing pipe 13, and bristles 142 arranged on the brush body 141 and configured to clean the mounting surface 202 of the workpiece 200.

[0020] When the powder cleaning device 10 is working, the driving assembly 123 is used to drive the rotating shaft 122 to make a circular motion around an axis line. The rotating shaft 122 drives the blowing pipe 13 to rotate. The blowing pipe 13 extends into the central hole 201 of the automobile wheel hub, and the residual and accumulated powder coating in the central hole 201 of the automobile wheel hub is purged and cleaned through the first blowing part 131. When the blowing pipe 13 extends into the central hole 201 of the automobile wheel hub, the brush 14 contacts the mounting surface 202 of the automobile wheel hub through the bristles 142 on the brush body 141. At the same time, the rotating shaft 122 drives the brush 14 located on the outer peripheral side of the blowing pipe 13 to rotate, and the residual and accumulated powder coating on the mounting surface 202 of the automobile wheel hub is scraped and cleaned through the bristles 142. The powder cleaning device can simultaneously clean the powder on the central hole 201 and the mounting surface 202 of the automobile wheel hub, with high cleaning efficiency and good powder cleaning effect.

[0021] Since the blowing pipe 13 extends into the central hole 201 of the automobile wheel hub to purge the residual and accumulated powder coating in the central hole 201 of the automobile wheel hub, the powder cleaning device can be suitable for cleaning automobile wheel hubs of different sizes and pore diameters. In other embodiments, the length of the blowing pipe 13 can be designed to determine the size of the blowing pipe 13 extending into the central hole 201 of the automobile wheel hub. For ultra-thin automobile wheel hubs, a shorter-sized blowing pipe 13 can be replaced, and specific details are not limited.

[0022] In order to improve the powder cleaning efficiency of the powder cleaning device 10 for the mounting surface 202 of the automobile wheel hub, the powder cleaning device 10 includes four brushes 14, and the four brushes 14 are evenly spaced around the outer peripheral side of the rotating shaft 122. In other embodiments, the number of brushes 14 can be set to two, three or more. Two brushes 14 can be symmetrically arranged on opposite sides of the rotating shaft 122, and three or more brushes 14 can be arranged at equal angles on the outer peripheral side of the rotating shaft 122, and specific details are not limited.

[0023] When using the brush 14 to clean the powder on the mounting surface 202 of the automotive wheel hub, after a long time, the surface of the bristles 142 of the brush 14 is likely to be contaminated with powder coating, resulting in the accumulation of dust on the bristles 142 of the brush 14. When the brush 14 is used to clean the mounting surface 202 of the automotive wheel hub, the brush 14 contaminated with powder coating will instead cause secondary pollution to the mounting surface 202 of the automotive wheel hub. Moreover, when the powder cleaning device 10 performs powder cleaning operations on workpieces 200 of different batches, since the colors of the powder coatings sprayed on the surfaces of workpieces 200 of different batches are not the same. For example, the powder coating sprayed on the surface of the previous batch of workpieces 200 is white powder coating, while the powder coating sprayed on the surface of this batch of workpieces 200 is red powder coating. The brush 14 contaminated with white powder coating is likely to brush the white powder coating onto the surface of the workpiece 200 sprayed with red powder coating, causing more serious secondary pollution to the mounting surface 202 of the workpiece 200 and resulting in defects of defective products. To solve this problem, the brush 14 further includes a second air blowing portion 143 provided on the brush body 141 and configured to blow the bristles 142. After the brush 14 finishes the powder cleaning operation on the mounting surface 202 of the automotive wheel hub, the second air blowing portion 143 provided on the brush body 141 is used to blow the bristles 142 of the brush 14 contaminated with powder coating, cleaning the bristles 142 of the brush 14 to avoid contaminating the surface of the workpiece 200 during the next powder cleaning operation.

[0024] According to Figure 2 As shown, in order to facilitate the supply of compressed air to the first air blowing portion 131 of the air blowing pipe 13 and the second air blowing portion 143 of the brush 14, the powder cleaning device 10 further includes a gas supply mechanism 15. The gas supply mechanism 15 includes a gas supply source 151, a first gas path 152, a second gas path 153, and a rotary joint 154 rotatably connected to the rotary shaft 122. The gas supply source 151, the rotary joint 154, and the first air blowing portion 131 are sequentially connected in air flow through the first gas path 152, and the gas supply source 151, the rotary joint 154, and the second air blowing portion 143 are sequentially connected in air flow through the second gas path 153. In other embodiments, an external gas source, such as a compressed gas tank, may also be installed on the rotary shaft 122 to supply the required gases to the first air blowing portion 131 of the air blowing pipe 13 and the second air blowing portion 143 of the brush 14 respectively. And the gas is not limited to compressed air, and may also be an inert gas such as nitrogen, which is not specifically limited.

[0025] According to Figure 3As shown in the figure, in order to simplify the design of the first gas path 152 and the second gas path 153, the rotating shaft 122 includes a double-layer pipe formed by sleeving an inner pipe 1221 and an outer pipe 1222, a support seat 1223 installed at one end of the double-layer pipe, and a pipe joint 1224 installed at the other end of the double-layer pipe and connected to the rotary joint 154. The internal cavity of the inner pipe 1221 constitutes a part of the first gas path 152, and the sandwich cavity 1225 formed between the inner pipe 1221 and the outer pipe 1222 constitutes a part of the second gas path 153. The blowing pipe 13 is installed on the support seat 1223 and is connected to the inner pipe 1221, and the brush body 141 is installed on the support seat 1223 and the second blowing part 143 is in air flow communication with the sandwich cavity 1225.

[0026] Since the brush 14 is fixedly installed on the rotating shaft 122 through the support seat 1223, the stability of the brush 14 can be improved. When the rotating shaft 122 rotates, the brush 14 does not generate elastic fluctuations, and the powder cleaning effect of the brush 14 on the hub mounting surface 202 can be improved.

[0027] Since most of the gas pipelines connecting the first blowing part 131 and the second blowing part 143 are hidden inside the rotating shaft 122, there are no redundant gas pipelines on the outer surface of the rotating shaft 122, which makes the powder cleaning device 10 more concise in structure. In other embodiments, it is not limited to designing the rotating shaft 122 as a double-layer pipe structure, and gas pipelines can also be arranged on the outer surface of the rotating shaft 122, and no specific limitation is made.

[0028] In this embodiment, the rotary joint 154 is a conveying connector that can transmit gas medium during rotation. The rotary joint 154 can be selected as a pneumatic rotary joint. In other embodiments, the rotary joint 154 can also be one of an air slip ring, an air-electric slip ring, a gas medium rotary joint, a multi-channel rotary joint, and a high-pressure rotary joint, and no specific limitation is made.

[0029] According to Figure 4 and Figure 5As shown, the outer tube 1222 is rotatably arranged on the rotating base 121 through a bearing 1226. The driving assembly 123 includes a driving motor 1231 installed on the frame 11, a driving wheel 1232 installed on the output shaft of the driving motor 1231, a driven wheel 1233 installed on the outer tube 1222, and a transmission belt 1234 drivingly connected between the driving wheel 1232 and the driven wheel 1233. When the driving motor 1231 operates, it drives the driving wheel 1232 to rotate, and then transmits the rotational power to the driven wheel 1233 through the transmission belt 1234, thereby driving the rotating shaft 122 to perform a circular motion around an axis. In other embodiments, it is not limited to using the structure of the driving motor 1231 and belt drive to drive the rotating shaft 122 to perform a circular motion around an axis. In other embodiments, the driving motor 1231 and the rotating shaft 122 can also be directly connected by a coupling, or a rotating power component such as a rotating motor or a rotating cylinder can be used as the driving assembly 123, and the specific details are not limited.

[0030] According to Figure 6 As shown, the first air blowing portion 131 of the air blowing pipe 13 includes air blowing holes opened on the pipe wall of the air blowing pipe 13. An air flow channel 132 communicating with the air flow of the air blowing holes is constructed inside the pipe wall of the air blowing pipe 13, and the air flow channel 132 extends obliquely downward along the center line of the air blowing pipe 13. In this embodiment, the included angle θ between the extending direction of the air flow channel 132 and the center line of the air blowing pipe 13 is 70°, and the diameter D of the air flow channel 132 is 1.4 mm. This design of the obliquely downward air blowing holes can increase the cleaning range of the center hole 201 of the automotive wheel hub in the height direction, and the cleaning effect is better. In other embodiments, the included angle between the extending direction of the air flow channel 132 and the center line of the air blowing pipe 13 can also be selected and designed within the range of 70° to 90°, and the diameter of the air flow channel 132 can also be selected and designed within the range of 1.4 mm to 2 mm, and the specific details are not limited. In addition, the first air blowing portion 131 is not limited to opening air blowing holes on the pipe wall of the air blowing pipe 13. In other embodiments, the first air blowing portion 131 can also be an air blowing nozzle installed on the pipe wall of the air blowing pipe 13, or an air blowing nozzle installed at the pipe orifice of the air blowing pipe 13. By setting the orientation of the air blowing nozzle to extend obliquely downward on one side of the center line of the air blowing pipe 13, the function of the first air blowing portion 131 to blow obliquely downward can also be realized, and the specific details are not limited.

[0031] According to Figures 7 to 9As shown, the brush 14 includes a brush body 141, bristles 142 provided on the brush body 141, and a second air blowing portion 143 provided on the brush body 141 and blowing air toward the bristles 142. Among them, an air flow channel is configured inside the brush body 141, and the second air blowing portion 143 includes a plurality of air blowing holes opened on the surface of the brush body 141 and communicated with the air flow channel. When looking down from top to bottom, multiple clusters of bristles 142 are provided on the brush body 141. Each cluster of bristles 142 is designed in a hexagonal shape, and the edges of multiple clusters of bristles 142 are adjacent to each other. Adjacent two clusters of bristles 142 are arranged in a staggered manner. The air blowing holes are arranged in a row along the length direction of the brush body 141 and face the bristles 142. Since the air blowing holes are independent of the bristles 142, when the bristles 142 of the brush 14 contact the mounting surface 202 of the vehicle wheel for cleaning operations, the residual powder coating swept from the mounting surface 202 of the vehicle wheel is not likely to block the air blowing holes. In other embodiments, the air blowing holes can also be arranged in the vegetation area of the bristles 142, that is, the air blowing holes are hidden in the bristles 142, and specific arrangements are not limited.

[0032] According to Figures 10 to 12 As shown, in order to improve the powder cleaning operation efficiency and simultaneously perform powder cleaning operations on multiple workpieces 200 to be powder cleaned, such as performing powder cleaning operations on workpieces 200 of the same batch at the same time, or performing powder cleaning operations on workpieces 200 of different batches at the same time, in another embodiment of the present invention, a powder cleaning device 100 is further provided. The powder cleaning device 100 includes three powder cleaning devices 10, and the three powder cleaning devices 10 are arranged at intervals along the length direction of the powder cleaning device 100. In other embodiments, two or more powder cleaning devices 10 can also be provided, and multiple powder cleaning devices 10 can also be arranged at intervals along the width direction of the powder cleaning device 100, and specific arrangements are not limited.

[0033] According to Figure 13 and Figure 14As shown, in order to facilitate the fixation of the workpiece 200 to be subjected to the deflouring operation, the deflouring device 100 further includes a clamping device 20 mounted on a robot (not shown in the figure). The clamping device 20 includes three clamping mechanisms 22 disposed above the frame 11 and configured to clamp the workpiece 200. The robot drives the clamping mechanism 22 and feeds the workpiece 200 into the working area of the deflouring device. The clamping mechanism 22 includes a clamping frame 21, a fixed clamping jaw 222, a movable clamping jaw 223, and a clamping cylinder 221. The fixed clamping jaw 222 is fixedly mounted on the clamping frame 21, the movable clamping jaw 223 is slidably mounted on the clamping frame 21 through a slide rail 224 and a slider 225, and the clamping cylinder 221 is mounted on the clamping frame 21 and is drivingly connected to the movable clamping jaw 222. Driven by the clamping cylinder 221, the movable clamping jaw 222 can move toward or away from the fixed clamping jaw 223, thereby clamping or releasing the workpiece 200. In order not to damage the outer contour surface of the automotive wheel hub, both the fixed clamping jaw 222 and the movable clamping jaw 223 are designed to include clamping columns coated with soft rubber. The outer contour surface of the automotive wheel hub is clamped by a pair of clamping columns to clamp and fix the automotive wheel hub. The clamping device 20 can clamp three automotive wheel hubs at a time. In other embodiments, the clamping device 20 can also be mounted on a manipulator. The clamping device 20 can be designed to include one or two clamping mechanisms 22, or can also include more clamping mechanisms 22, which is not specifically limited.

[0034] According to Figure 15 As shown, when the deflouring device 10 performs deflouring operations on the central hole 201 and the mounting surface 202 of the workpiece 200, the dust swept away by the deflouring device 10 is likely to fly into the surrounding environment, causing dust emission and dust diffusion. This not only easily causes secondary pollution to the surface of the workpiece 200, but also poses a safety hazard of dust explosion. To solve the above problems, the deflouring device 100 further includes a dust removal device 30. The dust removal device 30 includes an inner protective cover 31 disposed on the frame 11 and covering the outside of the rotating mechanism 12, an outer protective cover 32 disposed on the frame 11 and covering the outside of the inner protective cover 31, a dust collection space 33 jointly enclosed by the inner protective cover 31 and the outer protective cover 32, an exhaust duct 34 disposed on the frame 11 and in air flow communication with the dust collection space 33, and a negative pressure source (not shown in the figure) in air flow communication with the exhaust duct 34 and configured to generate a negative pressure air flow from the dust collection space 33 into the exhaust duct 34. The negative pressure source can be a suction motor, and a dust filtering component, such as a dust bag or a dust box, can be provided in the air extraction path of the exhaust duct 34. The dust filtering component can include a dust bag type filter inside. In other embodiments, the negative pressure source can also be a negative pressure pump or an air compressor, which is not specifically limited.

[0035] When the flour cleaning device 100 is working, the workpiece 200 is clamped by the clamping device 20 and sent into the dust collection space 33 of the dust removal device 30. The flour cleaning device 10 simultaneously performs flour cleaning operations on the central hole 201 and the mounting surface 202 of the workpiece 200. The dust removal device 30 timely extracts the cleaned dust, avoiding secondary pollution to the surface of the workpiece 200 caused by the cleaned dust and causing unnecessary safety hazards, making the flour cleaning operation safer and cleaner.

[0036] The technical scope of the present invention is not limited to the content in the above specification. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A powder cleaning device for a coating production line, suitable for cleaning the center hole of a workpiece and the mounting surface outside the center hole, characterized in that: The powder cleaning device comprises: frame; The rotating mechanism comprises a rotating seat arranged on the frame, a rotating shaft rotatably arranged on the rotating seat around an axis, and a driving assembly arranged on the frame and configured to drive the rotating shaft to perform circular motion around the axis; An air blowing pipe is arranged on the rotating shaft and extends in the up-down direction, the air blowing pipe is provided with a first air blowing portion for blowing the central hole of the workpiece, and the first air blowing portion is configured to be suitable for communicating with an external air source; At least one brush includes a brush body arranged on the rotating shaft and located on the outer peripheral side of the blowing tube, bristles arranged on the brush body and configured to clean the mounting surface of the workpiece, and a second blowing part arranged on the brush body and configured to blow the bristles, wherein the second blowing part is configured to be connected to an external air source.

2. The powder cleaning device according to claim 1, characterized in that: The powder cleaning device also includes an air supply mechanism, which includes an air supply source, a first air path, a second air path, and a rotating joint rotatably connected to the rotating shaft, the air supply source, the rotating joint and the first blowing part are connected in sequence by air flow through the first air path, and the air supply source, the rotating joint and the second blowing part are connected in sequence by air flow through the second air path.

3. The powder cleaning device according to claim 2, characterized in that: The rotating shaft comprises a double-layer tube formed by sleeves of an inner tube and an outer tube, a support seat installed on one end of the double-layer tube, and a pipe joint installed on the other end of the double-layer tube and connected to the rotating joint.

4. The powder cleaning device according to claim 3 is characterized in that: The inner cavity of the inner tube constitutes a part of the first gas path, and the interlayer cavity formed between the inner tube and the outer tube constitutes a part of the second gas path.

5. The powder cleaning device according to claim 4, characterized in that: The air blowing pipe is installed on the support seat and is connected with the inner tube. The brush body is installed on the support seat and the second air blowing part is connected with the interlayer cavity airflow.

6. The powder cleaning device according to claim 3, characterized in that: The outer tube is rotatably arranged on the rotating seat through a bearing, and the driving assembly includes a driving motor installed on the frame, a driving wheel installed on the output shaft of the driving motor, a driven wheel installed on the outer tube, and a transmission belt connected between the driving wheel and the driven wheel.

7. The powder cleaning device according to claim 2, characterized in that: The powder cleaning device includes a plurality of brushes, which are arranged at intervals around the outer circumference of the rotating shaft; the rotary joint includes one of a pneumatic rotary joint, an air slip ring, an air-electric slip ring, a gas medium rotary joint, a multi-channel rotary joint, and a high-pressure rotary joint.

8. The powder cleaning device according to claim 1, characterized in that: The first blowing part includes a blowing hole or a blowing nozzle opened on the tube wall of the blowing tube, and the tube wall of the blowing tube is internally configured with an air flow channel connected to the blowing hole or the blowing nozzle, and the air flow channel extends downwardly at an angle to the center line of the blowing tube; Alternatively, the first air blowing portion comprises an air blowing nozzle connected to the pipe opening of the air blowing pipe, and the air blowing nozzle extends toward a side inclined to the center line of the air blowing pipe.

9. The powder cleaning device according to claim 7, characterized in that: The angle between the extension direction of the air flow channel and the center line of the air blowing pipe is 70° to 90°; the diameter of the air flow channel is 1.4 mm to 2 mm.

10. A powder cleaning device for a coating production line, characterized in that: include: The dust removal device comprises an inner shield disposed on the frame and covering the outer side of the rotating mechanism, an outer shield disposed on the frame and covering the outer side of the inner shield, a dust collecting space enclosed by the inner shield and the outer shield, an exhaust pipe disposed on the frame and connected to the dust collecting space by airflow, and a negative pressure source connected to the exhaust pipe by airflow and configured to generate a negative pressure airflow from the dust collecting space into the exhaust pipe; A clamping device, comprising at least one clamping mechanism disposed above the frame and configured to clamp the workpiece and deliver it into the dust collecting space; as well as At least one powder cleaning device according to any one of claims 1 to 9.

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