Lifting type coating machine

Abstract

The utility model discloses a lifting type coating machine. The lifting type coating machine comprises a coating cabinet body, a material containing barrel, a workpiece barrel, a coating spin-drying mechanism, a rotary limiting mechanism and a barrel body lifting mechanism, according to the lifting type coating machine, the rotation coaxiality between the workpiece barrel and the coating spin-drying mechanism is guaranteed through the rotation limiting mechanism, vibration of the coating cabinet body caused by center-of-gravity shift of the workpiece barrel in the high-speed rotation process is reduced, the coating spin-drying mechanism can drive the workpiece barrel to rotate rapidly, the barrel body lifting mechanism drives the material containing barrel to move up and down, and therefore the workpiece barrel can rotate rapidly. A workpiece barrel on the coating and spin-drying mechanism enters and exits from the material containing barrel, a workpiece in the workpiece barrel is immersed in the coating, a barrel body moves downwards slightly after a period of time, the bottom of the workpiece barrel is higher than the liquid level of the coating in the material containing barrel, and the coating and spin-drying mechanism rapidly rotates for a period of time, so that redundant coating on the workpiece is thrown back into the material containing barrel, and waste of the coating is reduced; and meanwhile, when the device is applied to a coating production line, the cleanliness of the coating production line can be improved.

Description

Technical Field

[0001] This utility model relates to a coating machine, and more particularly to a lifting coating machine. Background Technology

[0002] Automated coating production lines are widely used in industries such as electronics, automobiles, and furniture, primarily for coating product surfaces. In these lines, a centrifugal spin-drying device is crucial for rapidly drying coated products, improving both production efficiency and quality. However, in existing coating machines, the workpiece basket is typically mounted on the centrifugal spin-drying equipment. Since the workpiece basket can move, the spin-drying equipment's rotation speed cannot be too high; otherwise, uneven distribution of the workpieces within the basket will affect the concentricity of the basket and the spin-drying equipment. Therefore, a lifting-type coating machine is proposed. Utility Model Content

[0003] Purpose of the utility model: To provide a lifting coating machine that can drive the workpiece barrel to rotate at high speed, and ensure the concentricity of the rotation of the workpiece barrel and the coating and drying mechanism, and the workpiece barrel is detachable.

[0004] Technical solution: The lifting coating machine provided by this utility model includes a coating cabinet, a material container, a workpiece container, a coating and drying mechanism, a rotation limiting mechanism, and a container lifting mechanism; a top mounting plate is horizontally fixed inside the coating cabinet; the coating and drying mechanism and the rotation limiting mechanism are both mounted on the top mounting plate, the coating and drying mechanism is used to drive the workpiece container to rotate, and the rotation limiting mechanism is used to ensure the rotational coaxiality between the workpiece container and the coating and drying mechanism; the container lifting mechanism is installed inside the coating cabinet and is used to lift the material container so that the workpiece container enters the material container.

[0005] Furthermore, it also includes a stirring mechanism; the stirring mechanism includes a stirring drive motor and a stirring shaft; the stirring shaft is rotary sealed and installed through the bottom of the holding tank; the stirring drive motor drives the stirring shaft to rotate through a stirring belt transmission pair; a horizontal stirring rod is fixed on the stirring shaft close to the lower inner wall of the holding tank; a stirring baffle is installed on the horizontal stirring rod; a liquid outlet is provided on the lower side of the holding tank; a manual valve is connected in series to the liquid outlet.

[0006] Furthermore, multiple bottom wheels are installed on the bottom surface of the material container; a push-pull handle is provided on the material container.

[0007] Furthermore, the barrel lifting mechanism includes a lifting frame and a lifting drive unit; the lifting frame is horizontal and vertically slidably installed inside the coating cabinet; multiple lifting reinforcing rods are connected and fixed inside the lifting frame; the bottom of the material barrel is supported on the lifting frame and each lifting reinforcing rod; barrel limiting blocks are provided on the lifting frame and each lifting reinforcing rod, and each barrel limiting block is close to the vertical side of the material barrel; the lifting drive unit is installed inside the coating cabinet and is used to drive the lifting frame to rise and fall.

[0008] Furthermore, the lifting drive unit includes a lifting drive motor and a lifting synchronous shaft; the lifting synchronous shaft is rotatably and horizontally mounted on the top mounting plate; the lifting drive motor drives the lifting synchronous shaft to rotate through a lifting worm gear transmission pair; lifting upper sprockets are installed on both ends of the lifting synchronous shaft, and two lifting lower sprockets are rotatably installed on the inner bottom surface of the coating cabinet; lifting drive chains are connected to the corresponding lifting upper and lower sprockets; two lifting fixing seats are installed on the lifting frame and respectively fixed to the two lifting drive chains.

[0009] Furthermore, the coating spin-drying mechanism includes a spin-drying drive motor, a spin-drying drive tube, a spin-drying cover, and two parallel plates; the spin-drying drive tube is rotatably mounted through the top mounting plate, and its lower end is fixed to the spin-drying cover; the spin-drying drive motor drives the spin-drying drive tube to rotate through a spin-drying chain transmission pair; the two parallel plates are mounted parallel to each other on the lower side of the spin-drying cover; a barrel opening positioning ring for snapping onto the two parallel plates is fixed at the upper barrel opening of the workpiece barrel.

[0010] Furthermore, the rotary limiting mechanism includes a limiting drive motor, a limiting drive tube, a limiting lifting tube, a limiting actuator, a limiting cover, and multiple reset units; the limiting drive tube is vertically fixed to the top mounting plate; the limiting lifting tube is vertically slidably sleeved on the limiting drive tube; a limiting drive screw for driving the vertical movement of the limiting lifting tube is rotatably mounted on the limiting drive tube; the limiting drive motor drives the limiting drive screw to rotate through a limiting chain transmission pair; a limiting drive plate is fixed on the limiting lifting tube; and a limiting actuator is fixed at the upper end of the limiting actuator. It has an upper limiting plate, and a limiting actuator rod slides vertically through the limiting drive plate and the spin-drying drive tube; the lower end of the limiting actuator rod is fixed to the upper side of the limiting cover; a limiting groove is coaxially provided on the lower side of the spin-drying cover, and the limiting cover moves vertically within the limiting groove, and the limiting actuator rod, the spin-drying drive tube, the limiting groove, and the limiting cover are coaxial; at each of the four equal division points of the circumferential edge of the lower side of the limiting cover, there are coaxial limiting blocks that simultaneously approach the inner circumferential edge of the positioning ring at the bucket opening; the reset unit is used to drive the limiting cover to move down and reset.

[0011] Furthermore, the reset unit includes a reset rod and a reset spring; the lower end of the reset rod is fixed to the upper side of the limiting cover, and the upper end passes through the spin-drying cover; the reset spring is installed on the reset rod and is used to drive the reset rod to move downward.

[0012] Compared with the prior art, the advantages of this utility model are as follows: The rotational limiting mechanism ensures the coaxiality of the workpiece bucket and the coating and drying mechanism, reducing the vibration of the workpiece bucket caused by the shift in the center of gravity during high-speed rotation. This allows the coating and drying mechanism to drive the workpiece bucket to rotate rapidly. The bucket lifting mechanism moves the material container up and down, allowing the workpiece bucket on the coating and drying mechanism to enter and exit the material container. The workpiece in the workpiece bucket is immersed in the coating. After a period of time, the bucket moves down slightly, making the bottom of the workpiece bucket higher than the surface of the coating in the material container. The coating and drying mechanism then rotates rapidly for a period of time, causing excess coating on the workpiece to be thrown back into the material container, reducing coating waste. Furthermore, when applied to a coating production line, it can improve the cleanliness of the coating production line. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the material container of this utility model;

[0015] Figure 3 This is a top view of the lifting frame of this utility model;

[0016] Figure 4 This is a cross-sectional view of the coating and spin-drying mechanism and the rotation limiting mechanism of this utility model;

[0017] Figure 5 This is a bottom view of the spin dryer cap of this utility model;

[0018] In the diagram: 101. Coating cabinet; 102. Top mounting plate; 103. Lifting drive motor; 104. Lifting synchronous shaft; 105. Lifting upper sprocket; 106. Lifting drive chain; 107. Lifting lower sprocket; 108. Lifting frame; 109. Lifting reinforcing rod; 110. Lifting guide seat; 111. Lifting pulley; 112. Tank limiting block; 113. Lifting fixing seat; 114. Material container; 115. Push-pull handle; 116. Manual valve; 117. Bottom traveling wheel; 118. Agitator drive motor; 119. Agitator shaft; 120. Horizontal agitator rod; 121. Agitator turbulence. 122. Plate; 123. Vertical stirring rod; 124. Lifting guide column; 125. Lifting convex strip; 126. Limit drive motor; 127. Limit drive tube; 128. Limit drive screw; 129. Limit elongated hole; 130. Limit lifting tube; 131. Limit drive plate; 132. Limit execution rod; 133. Upper limit plate; 134. Spin-drying drive tube; 135. Spin-drying drive motor; 136. Spin-drying cover; 138. Limit circular groove; 139. Limit cover; 140. Lower limit plate; 141. Reset rod; 142. Reset tension spring; 143. Coaxial limit block; 144. Parallel plate;

[0019] 6. Workpiece barrel; 601. Barrel opening positioning ring. Detailed Implementation

[0020] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited to the described embodiments.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] In the description of this utility model, it should be understood that the terms "left", "right", "front", "back", "up", "down", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example 1:

[0024] like Figure 1-5As shown, the lifting coating machine provided by this utility model includes: a coating cabinet 101, a material container 114, a workpiece container 6, a coating spin-drying mechanism, a rotation limiting mechanism, and a container lifting mechanism; a maintenance window is provided on one vertical side of the coating cabinet 101; a cabinet door for covering the maintenance window is hinged to the coating cabinet 101; a top mounting plate 102 is horizontally fixed on the upper side inside the coating cabinet 101; the coating spin-drying mechanism and the rotation limiting mechanism are both installed on the top mounting plate 102, the coating spin-drying mechanism is used to drive the workpiece container 6 to rotate, and the rotation limiting mechanism is used to ensure the rotational coaxiality between the workpiece container 6 and the coating spin-drying mechanism; the container lifting mechanism is installed inside the coating cabinet 101 and is used to lift the material container 114 so that the workpiece container 6 enters the material container 114; the material container 114 is used to fill the coating; several liquid outlet holes are provided on the vertical side wall and bottom of the workpiece container 6.

[0025] A rotary limiting mechanism ensures the coaxiality of rotation between the workpiece bucket 6 and the coating spin-drying mechanism, reducing the vibration of the workpiece bucket 6 caused by the shift in the center of gravity during high-speed rotation. This allows the coating spin-drying mechanism to drive the workpiece bucket 6 to rotate rapidly. The bucket lifting mechanism moves the material container 114 up and down, allowing the workpiece bucket 6 on the coating spin-drying mechanism to enter and exit the material container 114. The workpiece in the workpiece bucket 6 is immersed in the coating. After a period of time, the bucket moves down slightly, so that the bottom of the workpiece bucket 6 is higher than the surface of the coating in the material container 114. The coating spin-drying mechanism then rotates rapidly for a period of time, causing excess coating on the workpiece to be thrown back into the material container 114, reducing coating waste. At the same time, when applied to a coating production line, it can improve the cleanliness of the coating production line.

[0026] Furthermore, it also includes a stirring mechanism; the stirring mechanism includes a stirring drive motor 118 and a stirring shaft 119; the stirring shaft 119 is rotary sealed and installed through the center of the bottom of the holding tank 114; the stirring drive motor 118 drives the stirring shaft 119 to rotate through a stirring belt drive pair; a horizontal stirring rod 120 is fixed on the extended end of the stirring shaft 119, close to the lower inner wall of the holding tank 114; vertical stirring rods 122 are vertically fixed on both ends of the horizontal stirring rod 120, close to the vertical inner wall of the tank 114; stirring baffles 121 are installed on the horizontal stirring rod 120 and the two vertical stirring rods 122; a liquid outlet is provided on the lower side of the holding tank 114; a manual valve 116 is connected in series to the liquid outlet.

[0027] The stirring shaft 119 is rotated by the stirring drive motor 118, which causes the horizontal stirring rod 120, the vertical stirring rod 122 and the stirring baffle 121 to stir the coating in the container 114, preventing sedimentation at the bottom from affecting the coating effect.

[0028] Furthermore, multiple bottom casters 117 are installed on the bottom surface of the material container 114; multiple push-pull handles 115 are provided on the upper side of the material container 114. The bottom casters 117 and push-pull handles 115 make the material container 114 easy to move, facilitating the addition or replacement of paint.

[0029] Furthermore, the barrel lifting mechanism includes a lifting frame 108 and a lifting drive unit; the lifting frame 108 is horizontally arranged, and multiple lifting reinforcing rods 109 are connected and fixed inside the lifting frame 108; the bottom of the material container 114 is supported on the lifting frame 108 and each lifting reinforcing rod 109; multiple barrel limiting blocks 112 are provided on the upper side of the lifting frame 108 and each lifting reinforcing rod 109, and each barrel limiting block 112 is close to the vertical side of the material container 114; lifting guide columns 124 are provided on two opposite vertical inner walls of the coating cabinet 101; Lifting guide columns 124 are provided with lifting protrusions 125 on two opposite vertical side walls; lifting guide seats 110 are fixed on two opposite edges of the lifting frame 108; two lifting pulleys 111 are rotatably mounted on the lifting guide seats 110; the lifting pulleys 111 on the two lifting guide seats 110 are respectively driven and engaged on the lifting protrusions 125 on the two lifting guide columns 124, and the lifting pulleys 111 on the same lifting guide seat 110 clamp the corresponding lifting guide column 124; the lifting drive unit is installed in the coating cabinet 101 and is used to drive the lifting frame 108 to rise and fall.

[0030] The barrel limiting block 112 is used to position the material container 114; the lifting guide column 124, the lifting protrusion 125 and the lifting pulley 111 are used to achieve the vertical sliding installation of the lifting frame 108 with less friction, while ensuring the levelness of the lifting frame 108.

[0031] Furthermore, the lifting drive unit includes a lifting drive motor 103 and a lifting synchronous shaft 104; the lifting synchronous shaft 104 is rotatably and horizontally mounted on the top mounting plate 102; the lifting drive motor 103 drives the lifting synchronous shaft 104 to rotate through a lifting worm gear transmission pair; lifting upper sprockets 105 are installed on both ends of the lifting synchronous shaft 104; two lifting lower sprockets 107, corresponding to the positions of the two lifting upper sprockets 105, are rotatably mounted on the inner bottom surface of the coating cabinet 101; lifting drive chains 106 are connected to the corresponding lifting upper sprockets 105 and lifting lower sprockets 107; lifting fixing seats 113, respectively fixed to the lifting drive chains 106, are installed on the two edges of the lifting frame 108 where the lifting guide seat 110 is installed.

[0032] The lifting drive motor 103 drives the lifting synchronous shaft 104 to rotate, causing the two lifting upper sprockets 105 to drive the two lifting drive chains 106 to operate synchronously, so that the two lifting fixed seats 113 drive the two sides of the lifting frame 108 to lift and lower synchronously, thereby realizing the lifting and lowering adjustment of the material container 114.

[0033] Furthermore, the coating spin-drying mechanism includes a spin-drying drive motor 135, a spin-drying drive tube 134, a spin-drying cover 136, and two parallel plates 144. The spin-drying drive tube 134 is vertically and rotatably mounted on the top mounting plate 102, and its lower end is fixed at the center of the upper side of the spin-drying cover 136. The spin-drying drive motor 135 drives the spin-drying drive tube 134 to rotate through a spin-drying chain transmission pair. The two parallel plates 144 are mounted parallel to each other on the lower side of the spin-drying cover 136, and the lower edges of the two parallel plates 144 are bent horizontally relative to each other to form drive eaves. A barrel opening positioning ring 601 is coaxially fixed at the upper barrel opening of the workpiece barrel 6. Parallel edges are provided on both sides of the outer circumferential edge of the barrel opening positioning ring 601. The two parallel edges of the barrel opening positioning ring 601 are respectively snapped and supported on the two drive eaves.

[0034] The spin-drying drive motor 135 drives the spin-drying drive tube 134 to rotate, which causes the spin-drying cover 136 and the two parallel plates 144 to drive the workpiece barrel 6 to rotate synchronously, thereby realizing the spin-drying of the workpiece; the cooperation between the drive eaves and the parallel edges enables the spin-drying cover 136 to drive the workpiece barrel 6 to rotate synchronously.

[0035] Furthermore, the rotary limiting mechanism includes a limiting drive motor 126, a limiting drive tube 127, a limiting drive screw 128, a limiting lifting tube 130, a limiting actuator 132, a limiting cover 139, and multiple reset units; the limiting drive tube 127 is vertically fixed on the top mounting plate 102; the limiting lifting tube 130 is vertically slidably sleeved on the limiting drive tube 127; a limiting drive block is provided on the limiting drive tube 127, through which a limiting elongated hole 129 passes, and the limiting drive block is fixed on the inner wall of the limiting lifting tube 130; the limiting drive screw 128 is rotatably and vertically installed inside the limiting drive tube 127, and threadedly passes through the limiting drive block; the limiting drive motor 126 drives the limiting drive screw 128 to rotate through a limiting chain transmission pair; the limiting lifting tube 130... A limit drive plate 131 is fixed on 130; an upper limit plate 133 is fixed on the upper end of the limit actuator 132, the limit actuator 132 slides vertically through the limit drive plate 131 and the spin-drying drive tube 134, and the limit actuator 132 and the spin-drying drive tube 134 are coaxial; the lower end of the limit actuator 132 is fixed at the center of the upper side of the limit cover 139; a limit groove 138 is coaxially provided on the lower side of the spin-drying cover 136, and the limit cover 139 moves vertically within the limit groove 138; coaxial limit blocks 143 are fixed at the four equal division points of the circumferential edge of the lower side of the limit cover 139, and when the limit cover 139 moves down, the four coaxial limit blocks 143 are close to the inner circumferential edge of the barrel opening positioning ring 601; the reset unit is used to drive the limit cover 139 to move down and reset.

[0036] The limit drive motor 126 drives the limit drive screw 128 to rotate, and the limit drive block drives the limit lifting tube 130 to rise and fall. When the limit lifting tube 130 moves upward, the limit drive plate 131 drives the limit execution rod 132 and the limit cover 139 to move upward into the limit circular groove 138 through the upper limit plate 133. The coaxial limit block 143 disengages from the workpiece barrel 6. When the limit lifting tube 130 moves downward, the reset unit drives the limit cover 139 to move downward and reset, so that the upper limit plate 133 is always pressed on the limit drive plate 131, so that the four coaxial limit blocks 143 can limit the workpiece barrel 6.

[0037] Furthermore, the reset unit includes a reset rod 141 and a reset spring 142; the lower end of the reset rod 141 is fixed to the upper side of the limiting cover 139, and the upper end passes through the spin-dry cover 136; a lower limiting plate 140 is fixed to the upper through end of the spin-dry cover 136; the reset spring 142 is sleeved on the reset rod 141 and elastically connected between the upper side of the spin-dry cover 136 and the lower limiting plate 140. By utilizing the elastic connection of the reset spring 142 between the upper side of the spin-dry cover 136 and the lower limiting plate 140, the reset rod 141 is driven to move the limiting cover 139 downwards to reset.

[0038] In the lifting coating machine provided by this utility model, the lifting drive motor 103, the stirring drive motor 118, the limit drive motor 126, and the spin-drying drive motor 135 all adopt existing stepper motors.

[0039] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A lifting coating machine, characterized in that: The system includes a coating cabinet (101), a material container (114), a workpiece container (6), a coating and drying mechanism, a rotation limiting mechanism, and a container lifting mechanism. A top mounting plate (102) is horizontally fixed inside the coating cabinet (101). The coating and drying mechanism and the rotation limiting mechanism are both mounted on the top mounting plate (102). The coating and drying mechanism is used to drive the workpiece container (6) to rotate, and the rotation limiting mechanism is used to ensure the rotational coaxiality between the workpiece container (6) and the coating and drying mechanism. The container lifting mechanism is installed inside the coating cabinet (101) and is used to lift the material container (114) so ​​that the workpiece container (6) enters the material container (114).

2. The lifting coating machine according to claim 1, characterized in that: It also includes a stirring mechanism; the stirring mechanism includes a stirring drive motor (118) and a stirring shaft (119); the stirring shaft (119) is rotary sealed and installed through the bottom of the holding tank (114); the stirring drive motor (118) drives the stirring shaft (119) to rotate through the stirring belt drive pair; a horizontal stirring rod (120) is fixed on the stirring shaft (119) close to the lower inner wall of the holding tank (114); a stirring baffle (121) is installed on the horizontal stirring rod (120); a liquid outlet is provided on the lower side of the holding tank (114); a manual valve (116) is connected in series on the liquid outlet.

3. The lifting coating machine according to claim 1, characterized in that: Multiple bottom wheels (117) are installed on the bottom surface of the material container (114); a push-pull handle (115) is provided on the material container (114).

4. The lifting coating machine according to claim 1, characterized in that: The barrel lifting mechanism includes a lifting frame (108) and a lifting drive unit; the lifting frame (108) is horizontal and vertically slidably installed inside the coating cabinet (101); multiple lifting reinforcing rods (109) are connected and fixed inside the lifting frame (108); the bottom of the material container (114) is supported on the lifting frame (108) and each lifting reinforcing rod (109); barrel limiting blocks (112) are provided on the lifting frame (108) and each lifting reinforcing rod (109), and each barrel limiting block (112) is close to the vertical side of the material container (114); the lifting drive unit is installed inside the coating cabinet (101) and is used to drive the lifting frame (108) to rise and fall.

5. The lifting coating machine according to claim 4, characterized in that: The lifting drive unit includes a lifting drive motor (103) and a lifting synchronous shaft (104); the lifting synchronous shaft (104) is rotatably and horizontally mounted on the top mounting plate (102); the lifting drive motor (103) drives the lifting synchronous shaft (104) to rotate through a lifting worm gear transmission pair; lifting upper sprockets (105) are installed on both ends of the lifting synchronous shaft (104), and two lifting lower sprockets (107) are rotatably mounted on the inner bottom surface of the coating cabinet (101); lifting drive chains (106) are connected to the corresponding lifting upper sprockets (105) and lifting lower sprockets (107); two lifting fixing seats (113) are installed on the lifting frame (108) and respectively fixed on the two lifting drive chains (106).

6. The lifting coating machine according to claim 1, characterized in that: The coating spin-drying mechanism includes a spin-drying drive motor (135), a spin-drying drive tube (134), a spin-drying cover (136), and two parallel plates (144). The spin-drying drive tube (134) is rotatably mounted on the top mounting plate (102) and its lower end is fixed on the spin-drying cover (136). The spin-drying drive motor (135) drives the spin-drying drive tube (134) to rotate through the spin-drying chain transmission pair. The two parallel plates (144) are mounted in parallel on the lower side of the spin-drying cover (136). A barrel opening positioning ring (601) for snapping onto the two parallel plates (144) is fixed at the upper barrel opening of the workpiece barrel (6).

7. The lifting coating machine according to claim 6, characterized in that: The rotary limiting mechanism includes a limiting drive motor (126), a limiting drive tube (127), a limiting lifting tube (130), a limiting actuator (132), a limiting cover (139), and multiple reset units; the limiting drive tube (127) is vertically fixed on the top mounting plate (102); the limiting lifting tube (130) is vertically slidably sleeved on the limiting drive tube (127); a limiting drive screw (128) for driving the vertical movement of the limiting lifting tube (130) is rotatably mounted on the limiting drive tube (127); the limiting drive motor (126) drives the limiting drive screw (128) to rotate through a limiting chain transmission pair; a limiting drive plate (131) is fixed on the limiting lifting tube (130); an upper limiting plate is fixed on the upper end of the limiting actuator (132). Position plate (133), limit actuator (132) slides vertically through limit drive plate (131) and spin-dry drive tube (134); the lower end of limit actuator (132) is fixed on the upper side of limit cover (139); a limit groove (138) is coaxially provided on the lower side of spin-dry cover (136), the limit cover (139) moves vertically in the limit groove (138), and the limit actuator (132), spin-dry drive tube (134), limit groove (138) and limit cover (139) are coaxial; a coaxial limit block (143) is fixed at each of the four equal division points of the circumferential edge of the lower side of limit cover (139) for simultaneously approaching the inner circumferential edge of the barrel opening positioning ring (601); the reset unit is used to drive the limit cover (139) to move down and reset.

8. The lifting coating machine according to claim 7, characterized in that: The reset unit includes a reset rod (141) and a reset spring (142); the lower end of the reset rod (141) is fixed on the upper side of the limiting cover (139), and the upper end passes through the spin-drying cover (136); the reset spring (142) is installed on the reset rod (141) and is used to drive the reset rod (141) to move downward.

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