Manipulator for electrophoretic coating of magnesium alloy hub

Abstract

The invention discloses a manipulator for electrophoretic coating of a magnesium alloy hub, and belongs to the technical field of manipulators. In order to solve the problems of complex process and high equipment manufacturing cost in the conventional product, the invention provides the following technical scheme: the hub electrophoretic coating device comprises a motor mounting frame, and a butt clamp driving mechanism for fixing a hub and driving the hub to rotate and a coating positioning mechanism for electrophoretic coating of the hub are mounted on the motor mounting frame; the butt-clamping driving mechanism is composed of a butt-clamping assembly, an included angle adjusting assembly and a hub driving assembly, and the included angle adjusting assembly is located at the corner of the butt-clamping assembly and used for adjusting the fixed included angle of the butt-clamping assembly in advance. By arranging the butt clamp driving mechanism and the coating positioning mechanism, the manipulator capable of specially performing electrophoretic coating on the magnesium alloy hub is realized, comprehensive spraying can be completed only by one set of equipment, the process complexity is reduced, the efficiency of electrophoretic coating is improved, and the manufacturing cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of manipulators, in particular to a manipulator for electrophoretic coating of a magnesium alloy wheel hub. Background Art

[0002] Nowadays, magnesium alloy die-castings are increasingly used, among which magnesium alloy wheels are gradually replacing steel wheels, especially in the field of mid-to-high-end passenger cars, where alloy wheels have obvious competitive advantages in the market. Magnesium alloy wheels have the characteristics of absorbing vibration and rebound force. After being processed by CNC machine tools, they have high dimensional accuracy, small runout and good balance, making the car ride smooth and comfortable. The heat dissipation coefficient of magnesium alloy wheels is two to three times that of ordinary wheels. In addition, the structural characteristics of magnesium alloy wheels can easily conduct the heat generated by the braking system to the air. Even if the brakes are continuously applied during long-term driving, the braking system can maintain a low temperature to ensure driving safety.

[0003] During the manufacturing process of magnesium alloy wheels, a layer of paint needs to be sprayed on the surface to improve the overall performance. The conventional method is to use a dedicated multi-axis industrial robot with a manipulator with an electrophoretic coating nozzle to complete the spraying process of the corresponding magnesium alloy wheel.

[0004] However, in this process, since a hub frame is set in the center of the magnesium alloy wheel hub, and the nozzle on the robot can only spray in the same direction but not in the opposite direction, in order to avoid dead corners, each wheel hub needs to use two or more robots to be completely sprayed. Therefore, there are problems such as complex process and high equipment cost. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a robot for electrophoretic coating of magnesium alloy wheels. By arranging a clamping drive mechanism and a coating positioning mechanism, a robot capable of specifically performing electrophoretic coating on magnesium alloy wheels is realized. Only one set of equipment is needed to complete the comprehensive spraying, which reduces the process complexity, improves the efficiency of electrophoretic coating, and has a low cost, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A manipulator for electrophoretic coating of a magnesium alloy wheel hub, comprising a motor mounting frame, on which a clamping drive mechanism for fixing the wheel hub and driving the wheel hub to rotate and a coating positioning mechanism for electrophoretic coating of the wheel hub are mounted;

[0008] The clamping drive mechanism is composed of a clamping assembly, an angle adjustment assembly and a wheel hub drive assembly, wherein the angle adjustment assembly is located at the corner of the clamping assembly and is used to pre-adjust the fixed angle of the clamping assembly, and the wheel hub drive assembly is located on one side of the motor mounting frame and is used to drive the wheel hub to rotate, wherein the angle adjustment assembly includes two, which are symmetrically distributed on the left and right sides;

[0009] The painting positioning mechanism is composed of a gear drive assembly, a painting assembly and a feeding assembly, wherein the gear drive assembly is located on the other side of the motor mounting frame and is used to control the painting angle of the painting assembly, the painting assembly is located on one side of the gear drive assembly and is used to paint the wheel hub, and the feeding assembly is located on one side of the painting assembly and is used to provide the paint required for painting the wheel hub.

[0010] As a further solution of the present invention, the clamping assembly is composed of a servo motor, a screw, a slider, a column head, a buckle, a long clamping plate, an auxiliary clamping plate and a side positioning rotating wheel, wherein the servo motor is fixedly connected to an outer wall of one side of the motor mounting frame by screws, the screw is fixedly connected to an output shaft of the servo motor by a coupling, the slider is screwed to the outer wall of the screw, the column head is welded to the outer walls of the top and bottom of the slider, the buckle is slidably connected to the outer wall of the column head, the long clamping plate is welded to the outer wall of the end of the buckle, the auxiliary clamping plate is rotatably connected to the outer wall of one end of the long clamping plate by an axle pin, and the side positioning rotating wheel includes two groups, which are rotatably connected to the inner walls of the long clamping plate and the auxiliary clamping plate respectively;

[0011] The end of the screw rod away from the servo motor is rotatably connected to the inner wall of the motor installation frame. The column head includes two, which are slidably connected to the upper and lower grooves of the inner wall of the motor installation frame respectively. The ends of the two long splints close to the ring buckle are rotatably connected to the inner walls on both sides of the motor installation frame through axle pins.

[0012] As a further solution of the present invention, the angle adjustment assembly includes an internal threaded sleeve fixedly connected to one end of the long splint away from the buckle, the connecting seat is hinged on the outer wall of one side of the auxiliary splint, the screw is screwed on the inner wall of the internal threaded sleeve, and the outer wall of one end of the screw is fixedly connected to the outer wall of one side of the connecting seat.

[0013] As a further solution of the present invention, the hub drive assembly is composed of a servo motor 2, a driving pulley and a pulley group, wherein the servo motor 2 is fixedly connected to an outer wall on one side of the motor mounting frame by screws, the driving pulley is rotatably connected to the bottom inner wall of the motor mounting frame, and the pulley group is installed at the bottom between the servo motor 2 and the driving pulley, wherein the two pulleys of the pulley group are respectively fixedly connected to the output shaft of the servo motor 2 and the rotating shaft of the driving pulley, and are obliquely distributed.

[0014] As a further solution of the present invention, a directional drying mechanism is arranged inside the side positioning wheel, and the directional drying mechanism is composed of a hot air diversion component and a directional control component, wherein the hot air diversion components include four components, which are evenly distributed inside the side positioning wheel;

[0015] The hot air diversion assembly includes a fixed pipe fixedly connected to the inner wall of the bottom of the side positioning wheel, a hot air pipe rotatably connected to the outer wall of the bottom of the fixed pipe through a sealed bearing, and a diversion pipe fixedly connected to the outer wall of one end of the fixed pipe and distributed at equal distances;

[0016] The directional control component is composed of a hot air cylinder, an air nozzle, a fixed plate, a spring 1, a movable plate, a plug, a movable column, a spring 2 and a ball head, wherein the hot air cylinder is fixedly connected to the outer wall of one end of the shunt pipe, the air nozzle is welded to the outer wall of one side of the hot air cylinder, and the air nozzle includes multiple air nozzles, which are longitudinally distributed on the outer wall of the hot air cylinder, the fixed plate is welded to the inner wall of the hot air cylinder, the spring 1 is fixedly connected between the fixed plate and the movable plate, the plugs distributed at equal distances are all fixedly connected to the outer wall of one side of the movable plate, the movable column is welded to the top of the outer wall of one side of the movable plate, the spring 2 is embedded in the outer wall of one end of the movable column, the ball head is fixedly connected to the outer wall of one end of the spring 2, and the ball head is slidably connected to the inner wall of one end of the movable column.

[0017] As a further solution of the present invention, the gear drive assembly is composed of a servo motor three, a driving gear, a docking gear, a lower adjusting gear and an upper adjusting gear, wherein the driving gear is fixedly connected to the output shaft of the servo motor three, the docking gear is located at the bottom of the driving gear, the lower adjusting gear is located at the bottom of the docking gear, and the upper adjusting gear is located at the top of the driving gear, wherein the upper adjusting gear, the driving gear, the docking gear and the lower adjusting gear are meshed with each other in sequence from top to bottom.

[0018] As a further scheme of the present invention, the coating assembly is composed of an upper curved nozzle, nozzle one, a lower straight nozzle and nozzle two, wherein a sealing surface at one end of the upper curved nozzle is fixedly connected to the axis column of the upper adjusting gear, nozzle one is fixedly installed on the curved outer wall of the upper curved nozzle, a sealing surface at one end of the lower straight nozzle is fixedly connected to the axis column of the lower adjusting gear, nozzle two is fixedly installed on the top of the outer wall of one end of the lower straight nozzle, and nozzle two is linearly distributed on the outer wall of the lower straight nozzle.

[0019] As a further solution of the present invention, the feed assembly includes a rotary joint, a feed branch pipe, a feed main pipe and a solenoid valve. The rotary joints include two, which are rotatably connected to the air outlet holes at one end of the upper curved nozzle and the lower straight nozzle respectively. The feed branch pipe is fixedly connected to the inner wall of the interface of the rotary joint, and the end of the feed branch pipe away from the gear drive assembly is fixedly connected to the outer wall of one end of the feed main pipe through a three-way pipe, and the solenoid valve is fixedly installed on the outer wall of the feed main pipe.

[0020] As a further scheme of the present invention, the motor mounting frame includes a frame body, a mounting seat and a gear rack, wherein servo motor 1 and servo motor 2 are respectively fixedly connected to the outer wall of the frame body by screws, and the mounting seat is welded to the outer wall of one end of the frame body, which is used to fix the manipulator to the output end of the industrial robot, and servo motor 1 is arranged inside the mounting seat, the gear rack is welded to the outer wall of one side of the frame body close to the gear drive assembly, and servo motor 3 is fixedly connected to the outer wall of one side of the gear rack by screws, wherein the upper adjustment gear, drive gear, docking gear and lower adjustment gear are all rotatably connected to the inner wall of the gear rack through an axial column.

[0021] As a further solution of the present invention, a curved outer guard plate is welded to one end of the frame close to the driving wheel, and the curved outer guard plate is arranged outside the driving wheel, wherein an anti-slip ring is bonded to the outer wall of the driving wheel, and the curved outer guard plate is attached to the outer wall of the anti-slip ring.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. By setting up a clamping drive mechanism and a coating positioning mechanism, a robot capable of electrophoretic coating of magnesium alloy wheel hubs is realized. By utilizing the cooperation between the clamping assembly and the wheel hub driving assembly, the wheel hub can be first positioned between two sets of long clamps and auxiliary clamps by positioning the side positioning wheel, and then the servo motor 2 drives the driving wheel to rotate to realize the self-rotation of the wheel hub. Under the condition of the self-rotation of the wheel hub, not only the number of nozzles 1 and 2 is reduced, but also a favorable basis is provided for the comprehensive spraying of the wheel hub.

[0024] 2. In the coating positioning mechanism, the gear drive assembly, the coating assembly and the feed assembly cooperate to gradually reduce the angle between the upper curved nozzle and the lower straight nozzle, and allow nozzles 1 and 2 to be distributed on the top, inside and bottom of the wheel hub. With the rotation of the wheel hub, only one set of equipment is needed to complete the comprehensive spraying, which reduces the process complexity, improves the efficiency of electrophoretic coating, and has low cost.

[0025] 3. Relying on the mutual cooperation of the internal threaded sleeve, the connecting seat and the screw in the angle adjustment assembly, the angle between the long clamping plate and the auxiliary clamping plate can be adjusted by rotating the screw, which has a good compensation effect, so that the side positioning wheel can always fit on the side wall of the hub, thereby improving the fault tolerance of the manipulator when clamping the hub.

[0026] 4. By setting up a directional drying mechanism, the hot air blower can transport hot air to the hot air diversion component, and then divert it out through the directional control component, thereby realizing directional drying of the side wall of the hub, thereby quickly drying the paint on the side of the hub, reducing the impact of the paint sticking to the side positioning wheel, ensuring the comprehensiveness of the hub electrophoretic coating, and saving the use of paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a manipulator for electrophoretic coating of magnesium alloy wheels Figure 1 ;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of a manipulator for electrophoretic coating of magnesium alloy wheels Figure 2 ;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of a manipulator for electrophoretic coating of magnesium alloy wheels;

[0030] Figure 4 A schematic diagram of the clamping drive mechanism structure of a manipulator for electrophoretic coating of magnesium alloy wheels Figure 1 ;

[0031] Figure 5 A schematic diagram of the clamping drive mechanism structure of a manipulator for electrophoretic coating of magnesium alloy wheels Figure 2 ;

[0032] Figure 6 It is a schematic diagram of the structure of a clamping assembly of a manipulator for electrophoretic coating of a magnesium alloy wheel hub;

[0033] Figure 7 It is a schematic diagram of the structure of an angle adjustment component of a manipulator for electrophoretic coating of magnesium alloy wheels;

[0034] Figure 8 It is a cross-sectional view of a directional drying mechanism of a manipulator for electrophoretic coating of magnesium alloy wheels;

[0035] Fig. 9 A cross-sectional view of a directional control assembly of a manipulator for electrophoretic coating of magnesium alloy wheels;

[0036] Fig.10 A schematic diagram of the coating positioning mechanism structure of a manipulator for electrophoretic coating of magnesium alloy wheels Figure 1 ;

[0037] Fig.11 A schematic diagram of the coating positioning mechanism structure of a manipulator for electrophoretic coating of magnesium alloy wheels Figure 2 .

[0038] In the figure: 1. Motor mounting frame; 2. Clamping drive mechanism; 21. Clamping assembly; 211. Servo motor 1; 212. Screw; 213. Slider; 214. Column head; 215. Buckle; 216. Long clamp; 217. Auxiliary clamp; 218. Side positioning wheel; 22. Angle adjustment assembly; 221. Internal thread sleeve; 222. Connecting seat; 223. Screw; 23. Hub driving assembly; 231. Servo motor 2; 232. Driving wheel; 233. Pulley set; 3. Painting positioning mechanism; 31. Gear driving assembly; 311. Servo motor 3; 312. Driving gear; 313. Docking gear; 314. Lower adjustment gear; 315. Upper adjustment Gear; 32. Coating assembly; 321. Upper curved nozzle; 322. Nozzle 1; 323. Lower straight nozzle; 324. Nozzle 2; 33. Feed assembly; 331. Rotary joint; 332. Feed branch pipe; 333. Feed main pipe; 334. Solenoid valve; 4. Directional drying mechanism; 41. Hot air diversion assembly; 411. Fixed pipe; 412. Hot air pipe; 413. Diversion pipe; 42. Directional control assembly; 421. Hot air cylinder; 422. Air nozzle; 423. Fixed plate; 424. Spring 1; 425. Moving plate; 426. Plug; 427. Moving column; 428. Spring 2; 429. Ball head; 5. Mounting seat; 6. Curved outer guard plate; 7. Gear rack. DETAILED DESCRIPTION

[0039] See also Figure 1-4 In an embodiment of the present invention, a manipulator for electrophoretic coating of a magnesium alloy wheel hub includes a motor mounting frame 1, on which a clamping drive mechanism 2 for fixing the wheel hub and driving the wheel hub to rotate and a coating positioning mechanism 3 for electrophoretic coating of the wheel hub are installed. The motor mounting frame 1 includes a frame body, a mounting seat 5 and a gear rack 7. The frame body is used as the basic component of the manipulator, and the corresponding structures in the clamping drive mechanism 2 and the coating positioning mechanism 3 are all deployed on the basis of the frame body. A plurality of positioning holes are provided at the end of the mounting seat 5, and bolts can be passed through the positioning holes to fix the mounting seat 5 to the output end of the multi-axis industrial robot, so that the manipulator and the multi-axis industrial robot form a whole, and then the multi-axis industrial robot is used to control the movement of the manipulator. The gear rack 7 provides a fixing point for the servo motor 3 311 on the one hand, and is used to assemble the gear set on the other hand.

[0040] Servo motor 1 211 and servo motor 2 231 are respectively fixedly connected to the outer wall of the frame by screws. The setting of the frame can provide corresponding fixing points for servo motor 1 211 and servo motor 2 231. The mounting seat 5 is welded to the outer wall at one end of the frame, and is used to fix the manipulator to the output end of the industrial robot, and the servo motor 1 211 is arranged inside the mounting seat 5. The mounting seat 5 extends to one end close to the servo motor 1 211, and is used to dock the manipulator and the multi-axis industrial robot. The gear rack 7 is welded to the outer wall of one side of the frame close to the gear drive assembly 31, and the servo motor 3 311 is fixedly connected to the outer wall of one side of the gear rack 7 by screws, wherein the upper adjustment gear 315, the driving gear 312, the docking gear 313 and the lower adjustment gear 314 are all rotatably connected to the inner wall of the gear rack 7 through the shaft column. On the one hand, the gear rack 7 is used to fix the servo motor 311, and on the other hand, the upper adjusting gear 315, the driving gear 312, the docking gear 313 and the lower adjusting gear 314 are hidden inside the gear rack 7 to provide protection and ensure that the upper adjusting gear 315, the driving gear 312, the docking gear 313 and the lower adjusting gear 314 can all rotate smoothly.

[0041] See also Figure 4 and Fig.10 In an embodiment of the present invention, the clamping drive mechanism 2 is composed of a clamping assembly 21, an angle adjustment assembly 22 and a hub drive assembly 23, wherein the angle adjustment assembly 22 is located at the corner of the clamping assembly 21, and is used to pre-adjust the fixed angle of the clamping assembly 21. The angle adjustment assembly 22 can change the angle between the long clamping plate 216 and the auxiliary clamping plate 217, so as to ensure that the side positioning wheel 218 can fit the side of the hub. The hub drive assembly 23 is located on one side of the motor mounting frame 1, and is used to drive the hub to rotate. The hub rotates by the rotation of the driving wheel 232 of the hub drive assembly 23. Among them, the angle adjustment assembly 22 includes two, which are symmetrically distributed on the left and right. The angle adjustment assembly 22 is divided into a group of two, which are located on both sides of the periphery of the hub, respectively, and can maintain a stable structure and improve the stability of the hub in the clamped state.

[0042] The coating positioning mechanism 3 is composed of a gear drive assembly 31, a coating assembly 32 and a feed assembly 33, wherein the gear drive assembly 31 is located on the other side of the motor mounting frame 1, and is used to control the coating angle of the coating assembly 32. The gear drive assembly 31 can change the angle between the upper curved nozzle 321 and the lower straight nozzle 323 in the coating assembly 32, so that it can be switched at will from the unfolded to the gathered state. The coating assembly 32 is located on one side of the gear drive assembly 31, and is used to coat the wheel hub. The range of the coating sprayed by the nozzle 1 322 and the nozzle 2 324 on the coating assembly 32 is the height of the wheel hub plus the inner and outer radii, and the subsequent rotation of the wheel hub is required to achieve full coating. The feed assembly 33 is located on one side of the coating assembly 32, and is used to provide the coating required for coating the wheel hub. The feed assembly 33 can be matched with a feed pump, and the feed pump can transport the proportioned coating to the inside of the feed assembly 33 through the feed main pipe 333.

[0043] See also Figure 6 In the embodiment of the present invention, the clamping assembly 21 is composed of a servo motor 211, a screw rod 212, a slider 213, a column head 214, a buckle 215, a long clamp plate 216, an auxiliary clamp plate 217 and a side positioning wheel 218, wherein the servo motor 211 is fixedly connected to the outer wall of one side of the motor mounting frame 1 by screws. The screw rod 212 is fixedly connected to the output shaft of the servo motor 211 through a coupling. The screw rod 212 and the servo motor 211 are connected as a whole by a coupling, and the rotation of the output shaft of the servo motor 211 can drive the screw rod 212 to rotate. The slider 213 is screwed to the outer wall of the screw rod 212. Due to the screw connection between the slider 213 and the screw rod 212, the screw rod 212 can control the horizontal movement of the slider 213 during rotation. The column head 214 is welded to the outer wall of the top and bottom of the slider 213. Two column heads 214 are installed at the top and bottom of the slider 213, and grooves are opened on the top and bottom inner walls of the frame. The ends of the column heads 214 away from the slider 213 are just set on the inner walls of the grooves. Therefore, during the translation of the slider 213, the column heads 214 can not only slide along the inner walls of the grooves, but also play a limiting role to prevent the slider 213 from shaking.

[0044] The ring buckle 215 is slidably connected to the outer wall of the column head 214. The ring buckle 215 is divided into two groups, and each group is distributed up and down. The two upper ring buckles 215 are sleeved on the upper column head 214, and the two lower ring buckles 215 are sleeved on the lower column head 214, so that the column head 214 will drive the ring buckle 215 to swing and adjust the tilt angle during the movement. The long clamp 216 is welded to the outer wall of the end of the ring buckle 215. The end of each group of ring buckles 215 is connected to the long clamp 216, and the long clamp 216 will also swing during the swing of the ring buckle 215. The auxiliary clamp 217 is rotatably connected to the outer wall of one end of the long clamp 216 through an axle pin. The auxiliary clamp 217 can be independent of one end of the long clamp 216, and the auxiliary clamp 217 can change the tilt angle at will without the limitation of the external structure. The side positioning wheels 218 include two groups, which are rotatably connected to the inner walls of the long clamping plate 216 and the auxiliary clamping plate 217. When the long clamping plate 216 and the auxiliary clamping plate 217 are close to the wheel hub, the side positioning wheels 218 will fit the side of the wheel hub, which can prevent the wheel hub from falling off and ensure the stability of the wheel hub when rotating.

[0045] See also Figure 6 In the embodiment of the present invention, one end of the screw rod 212 away from the servo motor 211 is rotatably connected to the inner wall of the motor mounting frame 1. It is used to improve the stability of the screw rod 212 during rotation. The column head 214 includes two, which are respectively slidably connected to the upper and lower grooves on the inner wall of the motor mounting frame 1. It is used to improve the stability of the slider 213 during the translation process. The ends of the two long splints 216 close to the buckle 215 are rotatably connected to the inner walls on both sides of the motor mounting frame 1 through axle pins. The center of the axle pin serves as the axis of the long splint 216. During the swinging process of the long splint 216, the long splint 216 rotates around the axis as the center.

[0046] See also Figure 6-7 In the embodiment of the present invention, the angle adjustment component 22 includes an internal thread sleeve 221 fixedly connected to one end of the long clamping plate 216 away from the buckle 215. When the screw rod 223 rotates, it is used to cooperate with the screw rod 223 to adjust the position of the screw rod 223. The connecting seat 222 is hinged on the outer wall of one side of the auxiliary clamping plate 217. The connecting seat 222 and the auxiliary clamping plate 217 are rotated and matched, and the connecting seat 222 can swing along the outer wall of the auxiliary clamping plate 217. The screw rod 223 is screwed on the inner wall of the internal thread sleeve 221, and the outer wall of one end of the screw rod 223 is fixedly connected to the outer wall of one side of the connecting seat 222. When the screw rod 223 rotates along the internal thread inside the internal thread sleeve 221, the screw rod 223 can drive the connecting seat 222 to move, thereby controlling the swing of the auxiliary clamping plate 217, and then changing the angle between the long clamping plate 216 and the auxiliary clamping plate 217.

[0047] See also Figure 5In the embodiment of the present invention, the hub drive assembly 23 is composed of a servo motor 231, a driving wheel 232 and a pulley set 233, wherein the servo motor 231 is fixedly connected to the outer wall of one side of the motor mounting frame 1 by screws. The driving wheel 232 is rotatably connected to the bottom inner wall of the motor mounting frame 1. The surface of the driving wheel 232 is provided with an anti-slip ring, and the wheel hub can be driven to rotate together by rotating the driving wheel 232. The pulley set 233 is installed at the bottom between the servo motor 231 and the driving wheel 232, wherein the two pulleys of the pulley set 233 are respectively fixedly connected to the output shaft of the servo motor 231 and the rotating shaft of the driving wheel 232, and are obliquely distributed. Under the action of the pulley set 233, the servo motor 231 can drive the driving wheel 232 to rotate together.

[0048] See also Figure 8 and Fig. 9 In the embodiment of the present invention, a directional drying mechanism 4 is disposed inside the side positioning wheel 218, and the directional drying mechanism 4 is composed of a hot air diversion component 41 and a directional control component 42, wherein the hot air diversion component 41 includes four components, which are evenly distributed inside the side positioning wheel 218. The directional drying mechanism 4 can be used in conjunction with a hot air blower, which delivers hot air to the hot air diversion component 41, and then diverts it through the directional control component 42 to dry the side wall of the hub in a directional manner.

[0049] The hot air diversion assembly 41 includes a fixed pipe 411 fixedly connected to the inner wall of the bottom of the side positioning wheel 218, a hot air pipe 412 rotatably connected to the outer wall of the bottom of the fixed pipe 411 through a sealed bearing, and diversion pipes 413 fixedly connected to the outer wall of one end of the fixed pipe 411 and distributed at equal distances. The hot air blower first delivers the hot air to the hot air pipe 412, and then delivers it to the fixed pipe 411. Since the hot air pipe 412 and the fixed pipe 411 are connected by a sealed bearing, the fixed pipe 411 will not affect the gas delivery during the rotation process. Finally, the hot air will be diverted to the hot air cylinder 421 through multiple diversion pipes 413.

[0050] The directional control assembly 42 is composed of a hot air cylinder 421, an air nozzle 422, a fixed plate 423, a spring 1 424, a movable plate 425, a plug 426, a movable column 427, a spring 2 428 and a ball head 429, wherein the hot air cylinder 421 is fixedly connected to the outer wall of one end of the shunt pipe 413. The shunt pipe 413 is used to direct a portion of the hot air into the hot air cylinder 421. The air nozzle 422 is welded to the outer wall of one side of the hot air cylinder 421, and the air nozzle 422 includes a plurality of air nozzles, which are longitudinally distributed on the outer wall of the hot air cylinder 421. A plurality of air nozzles 422 are distributed on the hot air cylinder 421 for exhausting hot air. The fixed plate 423 is welded to the inner wall of the hot air cylinder 421, and the spring 1 424 is fixedly connected between the fixed plate 423 and the movable plate 425. By utilizing the elasticity of spring 1 424 , the movable plate 425 can compress spring 1 424 when being squeezed, and vice versa, the spring 1 424 expands to control the movable plate 425 to return to its original position.

[0051] The plugs 426 distributed at equal distances are all fixedly connected to the outer wall of one side of the moving plate 425, and the moving column 427 is welded to the top of the outer wall of one side of the moving plate 425. When the moving column 427 moves back and forth, the plugs 426 will switch back and forth between the inside and outside of the air nozzle 422, thereby achieving directional blowing of hot air. The second spring 428 is embedded and connected to the outer wall of one end of the moving column 427, and the ball head 429 is fixedly connected to the outer wall of one end of the spring 428, and the ball head 429 is slidably connected to the inner wall of one end of the moving column 427. During the rotation of the wheel hub, the side positioning wheel 218 can be driven to rotate, so that each set of ball heads 429 can contact the wheel hub in turn. During the contact between the ball heads 429 and the wheel hub, the ball heads 429 will first be pressed into the movable column 427, and then the movable column 427 will shrink into the hot air cylinder 421, and finally the plug 426 will be controlled to move away from the air nozzle 422 to achieve directional blowing of hot air. Only the air nozzle 422 on the side in contact with the wheel hub can exhaust air, and the air nozzles 422 in other directions are sealed.

[0052] See also Fig.11In the embodiment of the present invention, the gear drive assembly 31 is composed of a servo motor 311, a driving gear 312, a docking gear 313, a lower adjustment gear 314 and an upper adjustment gear 315, wherein the driving gear 312 is fixedly connected to the output shaft of the servo motor 311. The docking gear 313 is located at the bottom of the driving gear 312. The lower adjustment gear 314 is located at the bottom of the docking gear 313. The upper adjustment gear 315 is located at the top of the driving gear 312, wherein the upper adjustment gear 315, the driving gear 312, the docking gear 313 and the lower adjustment gear 314 are meshed with each other in order from top to bottom. The entire gear set is composed of an upper adjusting gear 315, a driving gear 312, a docking gear 313 and a lower adjusting gear 314. When the servo motor three 311 drives the driving gear 312 to rotate, the upper adjusting gear 315, the docking gear 313 and the lower adjusting gear 314 will also rotate together and are in a state of overall linkage. Since the upper curved nozzle 321 and the lower straight nozzle 323 are respectively fixed on the upper adjusting gear 315 and the lower adjusting gear 314, when the servo motor three 311 rotates, the upper curved nozzle 321 and the lower straight nozzle 323 will also swing accordingly.

[0053] See also Fig.11 In the embodiment of the present invention, the coating assembly 32 is composed of an upper curved nozzle 321, a nozzle 1 322, a lower straight nozzle 323 and a nozzle 2 324, wherein a sealing surface at one end of the upper curved nozzle 321 is fixedly connected to the axis column of the upper adjusting gear 315. The upper adjusting gear 315 is used to adjust the inclination angle of the upper curved nozzle 321. The nozzle 1 322 is fixedly mounted on the curved outer wall of the upper curved nozzle 321. The nozzle 1 322 is distributed on the inner side of the upper curved nozzle 321, and is mainly responsible for spraying paint on the bottom inner wall, inner side wall, top outer wall and outer side wall of the wheel hub. The sealing surface at one end of the lower straight nozzle 323 is fixedly connected to the axis column of the lower adjusting gear 314. The lower adjusting gear 314 is used to adjust the inclination angle of the lower straight nozzle 323. The second nozzle 324 is fixedly mounted on the top of the outer wall of one end of the lower straight spray pipe 323, and the second nozzle 324 is linearly distributed on the outer wall of the lower straight spray pipe 323. The second nozzle 324 is mainly responsible for spraying paint to the bottom outer wall of the wheel hub.

[0054] See also Fig.11In the embodiment of the present invention, the feed assembly 33 includes a rotary joint 331, a feed branch pipe 332, a feed main pipe 333 and a solenoid valve 334. The rotary joint 331 includes two, which are respectively rotatably connected to the air outlet holes at one end of the upper curved nozzle 321 and the lower straight nozzle 323. The rotary joint 331 is used as a docking component, mainly for docking between the upper curved nozzle 321 and the lower straight nozzle 323 and the feed branch pipe 332. The feed branch pipe 332 is fixedly connected to the inner wall of the interface of the rotary joint 331, and the end of the feed branch pipe 332 away from the gear drive assembly 31 is fixedly connected to the outer wall of one end of the feed main pipe 333 through a three-way pipe. The feed main pipe 333 can be used in conjunction with a feed pump, which can transport the paint to the feed main pipe 333, and then divert it to the two feed branches 332 by the three-way pipe. The solenoid valve 334 is fixedly installed on the outer wall of the feed main pipe 333. When the solenoid valve 334 is opened, the normal conveyance of the paint can be guaranteed, and the solenoid valve 334 plays a role in controlling the conveyance of the paint.

[0055] See also Figure 4 In the embodiment of the present invention, a curved outer guard plate 6 is welded to one end of the frame body close to the driving wheel 232, and the curved outer guard plate 6 is arranged outside the driving wheel 232, wherein an anti-skid ring is bonded to the outer wall of the driving wheel 232, and the curved outer guard plate 6 is attached to the outer wall of the anti-skid ring. The curved outer guard plate 6 is located outside the driving wheel 232, which can protect the driving wheel 232 on the one hand, and can scrape off the paint adhered to the surface of the anti-skid ring on the other hand.

[0056] The working principle of the present invention is as follows: the mounting seat 5 in the device can utilize its distributed mounting holes and be fixed to the output end of the corresponding multi-axis industrial robot by bolts. At this time, the manipulator is in an overall unfolded state. During actual operation, the manipulator can be transferred to one side of the magnesium alloy wheel hub by the multi-axis industrial robot, so that the wheel hub is located between the two sets of long clamps 216 and the auxiliary clamps 217. At the same time, the upper curved nozzle 321 and the lower straight nozzle 323 are respectively located above and below the wheel hub.

[0057] First, by rotating the screw 223 to make it rotate along the internal thread inside the internal thread sleeve 221, the connecting seat 222 is driven to move, and then the auxiliary clamping plate 217 is controlled to swing, thereby changing the angle between the long clamping plate 216 and the auxiliary clamping plate 217 in turn, so that the subsequent side positioning wheel 218 can fit the side wall of the hub.

[0058] Then, the servo motor 211 drives the screw rod 212 to rotate and control the slider 213 to make horizontal movement inside the motor mounting frame 1, thereby driving the long clamping plate 216 at the end of the ring buckle 215 to swing together. When the long clamping plate 216 and the auxiliary clamping plate 217 are close to the wheel hub, the side positioning wheel 218 will fit against the side of the wheel hub, which can prevent the wheel hub from falling off on the one hand and ensure the stability of the wheel hub during rotation on the other hand.

[0059] Next, under the action of the pulley group 233, the servo motor 231 can drive the driving wheel 232 to rotate together. Since an anti-slip ring is provided on the surface of the driving wheel 232, the rotation of the driving wheel 232 can drive the hub to rotate together, thereby realizing the self-rotation of the hub.

[0060] Afterwards, the feed main pipe 333 is used in conjunction with a feed pump, and the paint is transported to the feed main pipe 333 by the feed pump, and then diverted by the three-way pipe to the two feed branches 332. When the solenoid valve 334 is opened, the paint is transported to the upper curved nozzle 321 and the lower straight nozzle 323.

[0061] Next, the driving gear 312 is driven to rotate by the servo motor 311, so that the upper adjustment gear 315, the docking gear 313 and the lower adjustment gear 314 rotate together. At this time, the upper adjustment gear 315 is used to adjust the inclination angle of the upper curved nozzle 321, and the lower adjustment gear 314 is used to adjust the inclination angle of the lower straight nozzle 323. After the spraying positions of the upper curved nozzle 321 and the lower straight nozzle 323 are determined, the nozzle 1 322 is mainly responsible for spraying paint on the bottom inner wall, inner side wall, top outer wall and outer side wall of the wheel hub, and the nozzle 2 324 is mainly responsible for spraying paint on the bottom outer wall of the wheel hub. During the process of spraying paint by the two groups of nozzles, the wheel hub is in a rotating state, and only one set of equipment is needed to complete the comprehensive spraying of the wheel hub.

[0062] Finally, the hot air blower is used in conjunction with the hot air pipe 412. The hot air blower first delivers the hot air to the hot air pipe 412 and then to the fixed pipe 411. Since the hot air pipe 412 and the fixed pipe 411 are connected by a sealed bearing, the fixed pipe 411 will not affect the gas delivery during rotation. Finally, the hot air will be diverted to the hot air cylinder 421 through multiple diversion pipes 413. During the rotation of the wheel hub, the side positioning wheel 218 can be driven to rotate, so that each set of ball heads 429 can contact the wheel hub in turn. During the contact between the ball heads 429 and the wheel hub, the ball heads 429 will first be pressed into the inside of the moving column 427, and then the moving column 427 will shrink into the hot air cylinder 421. Finally, the plug 426 is controlled to stay away from the air nozzle 422 to achieve directional blowing of hot air. Only the air nozzle 422 on the side in contact with the wheel hub can exhaust air, and the air nozzles 422 in other directions are sealed to reduce the impact of the side positioning wheel 218 sticking to the paint.

[0063] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A manipulator for electrophoretic coating of magnesium alloy wheels, comprising a motor mounting frame (1), characterized in that: The motor mounting frame (1) is provided with a clamping drive mechanism (2) for fixing the wheel hub and driving the wheel hub to rotate, and a coating positioning mechanism (3) for electrophoretic coating of the wheel hub; The clamping drive mechanism (2) is composed of a clamping assembly (21), an angle adjustment assembly (22) and a wheel hub drive assembly (23), wherein the angle adjustment assembly (22) is located at a corner of the clamping assembly (21) and is used to pre-adjust the fixed angle of the clamping assembly (21); the wheel hub drive assembly (23) is located on one side of the motor mounting frame (1) and is used to drive the wheel hub to rotate; wherein the angle adjustment assembly (22) includes two components, which are symmetrically distributed on the left and right sides; The coating positioning mechanism (3) is composed of a gear drive assembly (31), a coating assembly (32) and a feeding assembly (33), wherein the gear drive assembly (31) is located on the other side of the motor installation frame (1) and is used to control the coating angle of the coating assembly (32); the coating assembly (32) is located on one side of the gear drive assembly (31) and is used to coat the wheel hub; and the feeding assembly (33) is located on one side of the coating assembly (32) and is used to provide the coating required for coating the wheel hub.

2. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: The clamping assembly (21) is composed of a servo motor (211), a screw (212), a slider (213), a column head (214), a buckle (215), a long clamp (216), an auxiliary clamp (217) and a side positioning wheel (218), wherein the servo motor (211) is fixedly connected to an outer wall of one side of the motor installation frame (1) by screws, the screw (212) is fixedly connected to the output shaft of the servo motor (211) by a coupling, and the slider (213) is screwed to the On the outer wall of the screw rod (212), the column head (214) is welded to the outer walls of the top and bottom of the slider (213), the buckle (215) is slidably connected to the outer wall of the column head (214), the long clamping plate (216) is welded to the outer wall of the end of the buckle (215), the auxiliary clamping plate (217) is rotatably connected to the outer wall of one end of the long clamping plate (216) through an axle pin, and the side positioning rotating wheel (218) includes two groups, which are rotatably connected to the inner walls of the long clamping plate (216) and the auxiliary clamping plate (217); The end of the screw rod (212) away from the servo motor (211) is rotatably connected to the inner wall of the motor installation frame (1), and the column head (214) includes two, which are respectively slidably connected to the upper and lower grooves of the inner wall of the motor installation frame (1), and the ends of the two long clamping plates (216) close to the ring buckle (215) are rotatably connected to the inner walls on both sides of the motor installation frame (1) through shaft pins.

3. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: The angle adjustment assembly (22) includes an internal threaded sleeve (221) fixedly connected to one end of the long clamping plate (216) away from the buckle (215), a connecting seat (222) hinged on an outer wall of one side of the auxiliary clamping plate (217), a screw (223) screwed on the inner wall of the internal threaded sleeve (221), and an outer wall of one end of the screw (223) fixedly connected to an outer wall of one side of the connecting seat (222).

4. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: The hub drive assembly (23) is composed of a servo motor 2 (231), a driving wheel (232) and a pulley group (233), wherein the servo motor 2 (231) is fixedly connected to an outer wall of one side of the motor installation frame (1) by screws, the driving wheel (232) is rotatably connected to the bottom inner wall of the motor installation frame (1), and the pulley group (233) is installed at the bottom between the servo motor 2 (231) and the driving wheel (232), wherein two pulleys of the pulley group (233) are respectively fixedly connected to the output shaft of the servo motor 2 (231) and the rotating shaft of the driving wheel (232), and are obliquely distributed.

5. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: A directional drying mechanism (4) is arranged inside the side positioning rotating wheel (218), and the directional drying mechanism (4) is composed of a hot air diversion component (41) and a directional control component (42), wherein the hot air diversion components (41) include four components, which are evenly distributed inside the side positioning rotating wheel (218); The hot air diversion assembly (41) comprises a fixed pipe (411) fixedly connected to the inner wall of the bottom of the side positioning wheel (218), a hot air pipe (412) rotatably connected to the outer wall of the bottom of the fixed pipe (411) via a sealed bearing, and diversion pipes (413) fixedly connected to the outer wall of one end of the fixed pipe (411) and distributed at equal distances; The directional control component (42) is composed of a hot air cylinder (421), an air nozzle (422), a fixed plate (423), a spring 1 (424), a movable plate (425), a plug (426), a movable column (427), a spring 2 (428) and a ball head (429), wherein the hot air cylinder (421) is fixedly connected to the outer wall of one end of the shunt pipe (413), the air nozzle (422) is welded to the outer wall of one side of the hot air cylinder (421), and the air nozzle (422) includes a plurality of air nozzles longitudinally distributed on the outer wall of the hot air cylinder (421), and the fixed plate (423) is welded to the outer wall of the hot air cylinder (421). On the inner wall of the hot air cylinder (421), spring one (424) is fixedly connected between the fixed plate (423) and the movable plate (425), the plugs (426) distributed at equal distances are all fixedly connected to the outer wall of one side of the movable plate (425), the movable column (427) is welded to the top of the outer wall of one side of the movable plate (425), spring two (428) is embedded in the outer wall of one end of the movable column (427), the ball head (429) is fixedly connected to the outer wall of one end of the spring two (428), and the ball head (429) is slidably connected to the inner wall of one end of the movable column (427).

6. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: The gear drive assembly (31) is composed of a servo motor (311), a driving gear (312), a docking gear (313), a lower adjusting gear (314) and an upper adjusting gear (315), wherein the driving gear (312) is fixedly connected to the output shaft of the servo motor (311), the docking gear (313) is located at the bottom of the driving gear (312), the lower adjusting gear (314) is located at the bottom of the docking gear (313), and the upper adjusting gear (315) is located at the top of the driving gear (312), wherein the upper adjusting gear (315), the driving gear (312), the docking gear (313) and the lower adjusting gear (314) are meshed with each other in order from top to bottom.

7. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: The coating assembly (32) is composed of an upper curved nozzle (321), a nozzle one (322), a lower straight nozzle (323) and a nozzle two (324), wherein a sealing surface at one end of the upper curved nozzle (321) is fixedly connected to the axis column of the upper adjustment gear (315), the nozzle one (322) is fixedly installed on the curved outer wall of the upper curved nozzle (321), a sealing surface at one end of the lower straight nozzle (323) is fixedly connected to the axis column of the lower adjustment gear (314), the nozzle two (324) is fixedly installed on the top of the outer wall of one end of the lower straight nozzle (323), and the nozzle two (324) is linearly distributed on the outer wall of the lower straight nozzle (323).

8. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: The feed assembly (33) comprises a rotary joint (331), a feed branch pipe (332), a feed main pipe (333) and a solenoid valve (334). The rotary joint (331) comprises two, which are rotatably connected to the air outlet holes at one end of the upper curved nozzle (321) and the lower straight nozzle (323), respectively. The feed branch pipe (332) is fixedly connected to the inner wall of the interface of the rotary joint (331), and one end of the feed branch pipe (332) away from the gear drive assembly (31) is fixedly connected to the outer wall of one end of the feed main pipe (333) through a three-way pipe. The solenoid valve (334) is fixedly installed on the outer wall of the feed main pipe (333).

9. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 1, characterized in that: The motor mounting frame (1) comprises a frame body, a mounting seat (5) and a gear rack (7), wherein servo motor 1 (211) and servo motor 2 (231) are respectively fixedly connected to the outer wall of the frame body by screws, the mounting seat (5) is welded to the outer wall of one end of the frame body, and is used to fix the manipulator to the output end of the industrial robot, and servo motor 1 (211) is arranged inside the mounting seat (5), the gear rack (7) is welded to the outer wall of one side of the frame body close to the gear drive assembly (31), and servo motor 3 (311) is fixedly connected to the outer wall of one side of the gear rack (7) by screws, wherein the upper adjustment gear (315), the driving gear (312), the docking gear (313) and the lower adjustment gear (314) are all rotatably connected to the inner wall of the gear rack (7) through a shaft column.

10. The manipulator for electrophoretic coating of magnesium alloy wheels according to claim 9, characterized in that: An arc-surface outer guard plate (6) is welded to one end of the frame body close to the driving wheel (232), and the arc-surface outer guard plate (6) is arranged outside the driving wheel (232), wherein an anti-skid ring is bonded to the outer wall of the driving wheel (232), and the arc-surface outer guard plate (6) is attached to the outer wall of the anti-skid ring.

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