Quick-drying dip-coating device for automobile motor production

Abstract

The invention discloses a quick-drying dip-coating device for automobile motor production, and relates to the technical field of automobile motor production. The dip-coating device comprises a dip-coating box, and a dip-coating mechanism is arranged in the dip-coating box. The bottom plate and the motor fixed in the bottom plate are installed in the direction adjusting roller through the inserting rod and the clamping block, the first servo motor is started, the first servo motor drives the rotating rod and the direction adjusting roller to rotate, the motor in the direction adjusting roller is made to rotate to the fixing plate, air in the bottom plate is pumped out through the air suction opening, the vacuum pump and the exhaust pipe, and the direction adjusting roller is driven to rotate. Through the arrangement of the component, the problem that paint liquid is mixed with air to generate bubbles during dip-coating of the motor is effectively avoided, the effect of vacuum dip-coating of the motor can be achieved, meanwhile, the paint surface is more uniform, the adhesive force of the paint surface is improved, and the paint liquid can permeate into gaps of complex parts such as a motor winding and a coil conveniently; and the insulativity and the corrosion resistance of the automobile motor are also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile motor production, and in particular to a dipping device capable of rapid drying for automobile motor production. Background Art

[0002] The automotive starter motor, also known as the motor, converts battery electrical energy into mechanical energy, driving the engine flywheel to start the engine. Automotive motor dip coating is a common motor protection technology widely used in the manufacturing of electric motors and transmission systems in the automotive industry. Its main purpose is to improve the durability and performance of the motor in various operating environments by applying a protective coating on the surface of the motor components. With the acceleration of the electrification of automobiles, the protection requirements for electric vehicle motors are becoming increasingly stringent, especially in terms of waterproofing, dustproofing, and corrosion resistance. Dip coating technology can effectively solve these problems. The process typically uses materials such as polyurethane, epoxy resin, or acrylic. These coatings have excellent electrical insulation, high temperature resistance, and chemical corrosion resistance, and can provide the necessary protective layer during motor operation. In addition, the dip coating process can reduce friction between internal motor components, improve mechanical efficiency, and extend the life of the motor. Dip coating not only improves the overall performance of the motor, but also improves the reliability of the motor in harsh environments and ensures its long-term stable operation. With the development of technology, the dip coating process has gradually developed towards automation and precision, further improving the consistency of the coating and the level of quality control.

[0003] In a Chinese patent (publication number: CN209772607U), a fast-drying dipping device for automobile motor production is disclosed. From preheating to drying, the device does not need to remove the automobile motor and place it in other equipment, saving a lot of time and processes. The paint control process can be completed without adding special equipment. The painting process is omitted and replaced by a quick process. The automobile motor is placed in the hanging basket under the pulley device. It is first quickly preheated by the heating fan and then immersed in the paint dipping tank. The hanging basket is then lifted to allow the automobile motor to be painted. The excess paint will drip into the paint dipping tank for continued use, saving energy and environmental protection. It is then sent to the drying room. The temperature-controlled heating pipe in the drying room can meet the needs of drying the automobile motor at low temperature first and then at high temperature. Due to the temperature control There are air outlets at the back of the heating tube, and the heat generated is quickly blown to the car motor. At the same time, the wind can accelerate evaporation, making the drying process faster. There is a paint dripping tray at the bottom of the drying chamber. If there is excess paint on the car motor that is not cleaned up, the paint will drip into the tray. Since the heating tube is parallel to the hanging basket, the paint will not drip onto the heating tube, enhancing safety. During the actual dipping process of the motor, the paint liquid comes into contact with the air during dipping, which will cause bubbles to form, resulting in uneven coating and poor adhesion. At the same time, the paint liquid is difficult to penetrate into the gaps in complex parts such as motor windings and coils, thereby reducing the insulation and corrosion resistance of the motor. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide a dipping device for automobile motor production that can be dried quickly.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A fast-drying dipping device for automobile motor production includes a dipping tank, a dipping mechanism disposed therein, the dipping mechanism including a steering roller, a servo motor, a rotating rod, an air intake, a fixed plate, a vacuum pump, and an exhaust pipe. The servo motor is fixedly connected to the dipping tank, the output shaft of the servo motor is fixedly connected to the rotating rod, the rotating rod is rotatably connected to the dipping tank, the rotating rod is fixedly connected to the steering roller, the steering roller is in contact with the inner wall of the dipping tank, the fixed plate is fixedly connected to the dipping tank, the fixed plate is fixedly connected to the air intake, the vacuum pump is fixedly connected to the fixed plate, and the exhaust pipe is fixedly connected to the vacuum pump. The interior of the steering roller is fitted with a bottom plate, and the upper surface of the bottom plate is provided with a fixing mechanism, which includes a receiving plate, a frame, a knob, a clamping claw, a slider and a bidirectional threaded rod.

[0006] Furthermore, the frame is fixedly connected to the base plate, the bidirectional threaded rod is rotatably connected to the frame, the bidirectional threaded rod is threadedly connected to the slider, the knob is fixedly connected to the bidirectional threaded rod, the receiving plate is fixedly connected to the slider, the receiving plate is fitted with the inner wall of the frame, and the clamp is fixedly connected to the receiving plate.

[0007] Furthermore, two groups of fixed blocks are fixedly connected to the lower surface of the base plate, and the interiors of the two groups of fixed blocks are clamped with clamping blocks, and the inner sides of the clamping blocks are fixedly connected with plug rods, and the plug rods are slidably plugged into the fixed blocks, and the lower ends of the plug rods are rotatably connected to the receiving block 2, and the lower surface of the receiving block 2 is fixedly installed with the servo motor 2, and the output shaft of the servo motor 2 is fixedly connected to the plug rod.

[0008] Furthermore, the lower surface of the receiving block 2 is fixedly connected to multiple groups of connecting rods, the lower ends of the multiple groups of connecting rods are fixedly connected to the receiving block 1, and an electric telescopic rod is fixedly installed inside the dipping box, and the output end of the electric telescopic rod is fixedly connected to the receiving block 1.

[0009] Furthermore, two groups of sliding rods are fixedly connected to the interior of the frame, and a second slider is slidably inserted on the surface of the two groups of sliding rods. The second slider is fixedly connected to the receiving plate, and the second slider fits against the inner wall of the frame.

[0010] Furthermore, a sealing plate is attached to the surface of the steering roller, the sealing plate is fixedly connected to the dipping box, a partition is attached to the surface of the steering roller, the partition is fixedly connected to the dipping box, and the sealing plate is fixedly connected to the partition.

[0011] Furthermore, a scraper is attached to the surface of the steering roller, a drainage groove is opened inside the scraper, a connecting plate is fixedly connected to one side of the scraper, the connecting plate is attached to the sealing plate, two groups of bolts are inserted into the inside of the connecting plate, and both groups of bolts are threadedly connected to the sealing plate.

[0012] Furthermore, an air outlet is fixedly installed inside the dipping box, and a heating pipe is fixedly installed inside the dipping box.

[0013] Furthermore, a box door is fixedly installed on the surface of the dipping box, an observation window is fixedly installed inside the box door, and a handle is fixedly installed on the surface of the box door.

[0014] Furthermore, a controller is fixedly mounted on the surface of the dipping box, a display screen is fixedly mounted on the surface of the controller, buttons are fixedly mounted on the surface of the controller, and four groups of bases are fixedly mounted on the lower surface of the dipping box, and the four groups of bases are all located on the same horizontal plane.

[0015] The beneficial effects of the present invention are as follows: 1. When the present invention dip-coats the automobile motor, the bottom plate and the motor fixed therein are installed inside the steering roller by means of an insert rod and a clamping block, the servo motor 1 is started, and the servo motor 1 drives the rotating rod and the steering roller to rotate, so that the motor inside the steering roller rotates to the fixed plate, and the air inside the bottom plate is evacuated through the air suction port, vacuum pump and exhaust pipe, so that the bottom plate is in a vacuum state, and the servo motor 1 is used again to rotate the bottom plate so that the bottom plate faces downward, and the electric telescopic rod drives the bottom plate and the motor to move vertically downward, so that the motor and The motor is dipped in the paint liquid and the paint liquid contacts the motor. After dipping, the bottom plate is rotated back to its original position and the motor is dried through the air outlet and the heating tube. After drying, this operation is repeated to make the motor dipped in more fully. The setting of this component effectively avoids the problem of bubbles generated by the mixture of paint liquid and air when dipping the motor, and can achieve the effect of vacuum dipping of the motor. At the same time, the paint surface is made more uniform, the adhesion of the paint surface is improved, and it is convenient for the paint liquid to penetrate into the gaps of complex parts such as motor windings and coils, thereby improving the insulation and corrosion resistance of the automobile motor.

[0016] 2. When fixing the motor, the present invention places multiple motors on the upper surface of the bottom plate, twists the knob, and drives the bidirectional threaded rod to rotate through the knob, so that the two sets of sliders threadedly connected on the surface of the bidirectional threaded rod drive the receiving plate and the clamping claw to move horizontally in opposite directions, so that the opposite clamping claws gradually fit the surface of the motor, thereby fixing the motor to be dipped. After the motor is fixed, the bottom plate is placed inside the steering roller so that the frame fits the inner wall of the steering roller, and the electric telescopic rod is started, which drives the receiving block, the connecting rod, and the receiving claw to move horizontally in opposite directions. Block 2, the plug rod and the card block move vertically upward, so that the card block and the plug rod are inserted into the interior of the fixed block, and the servo motor 2 drives the plug rod and the card block to rotate, so that the card block is engaged with the inner wall of the fixed block, thereby fixing the bottom plate to the output end of the electric telescopic rod. The setting of this component effectively avoids the problem of the motor tipping over when the automobile motor is dip-coated, and can achieve the effect of limiting the motor. At the same time, it improves the stability of the device during dip-coating, and can also facilitate the collection of the motor after the dip-coating is completed, thereby improving the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This invention Figure 1 Looking up at the internal structure diagram; Figure 3 This invention Figure 2 A top view of the overall structure diagram; Figure 4 This invention Figure 3 Look at the schematic diagram of some structures; Figure 5 This invention Figure 3 Left view of the local structure diagram; Figure 6 This invention Figure 5 Schematic diagram of the right view part structure; Figure 7 This invention Figure 6 A schematic diagram of the local structure from above; Figure 8 This invention Figure 7 Looking up at the internal structure diagram.

[0018] Figure numerals: 1, dipping box; 11, controller; 12, display screen; 13, button; 14, box door; 15, observation window; 16, handle; 17, base; 2, dipping mechanism; 21, air outlet; 22, heating tube; 23, partition; 24, sealing plate; 25, steering roller; 26, servo motor 1; 27, rotating rod; 28, air inlet; 29, fixing plate; 210, vacuum pump; 211, exhaust pipe; 3, scraper ; 31. Drain trough; 32. Connecting plate; 33. Bolt; 4. Fixing mechanism; 41. Bottom plate; 42. Adapter plate; 43. Frame; 44. Fixing block; 45. Knob; 46. Clamp; 47. Slider 1; 48. Bidirectional threaded rod; 49. Sliding rod; 410. Slider 2; 5. Electric telescopic rod; 51. Adapter block 1; 52. Connecting rod; 53. Insert rod; 54. Block; 55. Servo motor 2; 56. Adapter block 2. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] Example 1, as Figures 1-8 As shown, a fast-drying dipping device for automobile motor production includes a dipping tank 1. A dipping mechanism 2 is provided inside the dipping tank 1. The dipping mechanism 2 includes a steering roller 25, a servo motor 26, a rotating rod 27, an air intake 28, a fixed plate 29, a vacuum pump 210, and an exhaust pipe 211. The servo motor 26 is fixedly connected to the dipping tank 1. The output shaft of the servo motor 26 is fixedly connected to the rotating rod 27. The rotating rod 27 is rotatably connected to the dipping tank 1. The rotating rod 27 is fixedly connected to the steering roller 25. The steering roller 25 is in contact with the inner wall of the dipping tank 1. The fixed plate 29 is fixedly connected to the dipping tank 1. The fixed plate 29 is fixedly connected to the air intake 28. The vacuum pump 210 is fixedly connected to the fixed plate 29. The exhaust pipe 211 is fixedly connected to the vacuum pump 210. A bottom plate 41 is attached to the interior of the steering roller 25 , and a fixing mechanism 4 is provided on the upper surface of the bottom plate 41 . The fixing mechanism 4 includes a receiving plate 42 , a frame 43 , a knob 45 , a clamping claw 46 , a slider 47 and a bidirectional threaded rod 48 .

[0021] The main purpose of automobile motor dip coating is to improve the durability and performance of the motor in various working environments by applying a protective coating on the surface of the motor components. Polyurethane, epoxy resin or acrylic resin is usually used as the protective layer of the motor during dip coating. When the automobile motor is dip coated, first, the bottom plate 41 and the motor fixed inside it are installed into the interior of the steering roller 25 through the insertion rod 53 and the block 54, and the servo motor 26 is started. The servo motor 26 drives the rotating rod 27 and the steering roller 25 to rotate, so that the motor inside the steering roller 25 rotates. When the bottom plate 41 reaches the fixed plate 29, the air inside the bottom plate 41 is evacuated through the air inlet 28, the vacuum pump 210 and the exhaust pipe 211, so that the bottom plate 41 is in a vacuum state. The bottom plate 41 is rotated to the bottom by the servo motor 26 again, so that the bottom plate 41 faces downward, and the bottom plate 41 and the motor are driven by the electric telescopic rod 5 to move vertically downward, so that the motor contacts the paint liquid, thereby dipping the motor. After dipping, the bottom plate 41 is rotated back to its original position, and the motor is dried through the air outlet 21 and the heating tube 22. After drying, this operation is repeated to make the motor dipped more fully.

[0022] Example 2, as Figure 7 、 Figure 8 As shown, on the basis of the above embodiment, it also includes: the frame 43 is fixedly connected to the base plate 41, the two-way threaded rod 48 is rotatably connected to the frame 43, the two-way threaded rod 48 is threadedly connected to the slider 47, the knob 45 is fixedly connected to the two-way threaded rod 48, the receiving plate 42 is fixedly connected to the slider 47, the receiving plate 42 is fitted with the inner wall of the frame 43, and the clamp 46 is fixedly connected to the receiving plate 42. When fixing the motor, multiple groups of motors are placed on the upper surface of the base plate 41, and the knob 45 is twisted to drive the two-way threaded rod 48 to rotate through the knob 45, so that the two groups of sliders 47 threadedly connected to the surface of the two-way threaded rod 48 drive the receiving plate 42 and the clamp 46 to move horizontally in opposite directions, so that the opposite clamps 46 gradually fit into the surface of the motor, thereby fixing the motor to be dipped.

[0023] Example 3, as Figure 7 、 Figure 8As shown, on the basis of the above embodiment, it also includes that the lower surface of the bottom plate 41 is fixedly connected with two groups of fixed blocks 44, the interior of the two groups of fixed blocks 44 is clamped with a clamping block 54, the inner side of the clamping block 54 is fixedly connected with a plug rod 53, the plug rod 53 is slidably plugged with the fixed block 44, the lower end of the plug rod 53 is rotatably connected with a receiving block 2 56, the lower surface of the receiving block 2 56 is fixedly installed with a servo motor 2 55, the output shaft of the servo motor 2 55 is fixedly connected to the plug rod 53, the lower surface of the receiving block 2 56 is fixedly connected with multiple groups of connecting rods 52, the lower ends of the multiple groups of connecting rods 52 are fixedly connected with the receiving block 1 51, and the interior of the dipping box 1 is fixedly installed with an electric telescopic Rod 5, the output end of the electric telescopic rod 5 is fixedly connected to the receiving block 1 51. When fixing the bottom plate 41, the bottom plate 41 is placed inside the steering roller 25 so that the frame 43 fits the inner wall of the steering roller 25. The electric telescopic rod 5 is started, and the receiving block 1 51, the connecting rod 52, the receiving block 2 56, the insertion rod 53 and the card block 54 are driven by the electric telescopic rod 5 to move vertically upward, so that the card block 54 and the insertion rod 53 are inserted into the interior of the fixed block 44. The insertion rod 53 and the card block 54 are driven to rotate by the servo motor 2 55, so that the card block 54 is engaged with the inner wall of the fixed block 44, thereby fixing the bottom plate 41 to the output end of the electric telescopic rod 5.

[0024] Example 4, as Figure 7 、 Figure 8 As shown, on the basis of the above embodiment, it also includes that two groups of sliding rods 49 are fixedly connected to the inside of the frame 43, and the surfaces of the two groups of sliding rods 49 are slidably inserted with slider 2 410, slider 2 410 is fixedly connected to the receiving plate 42, and slider 2 410 is fitted with the inner wall of the frame 43. The sliding rod 49 limits the slider 2 410, so that the receiving plate 42 is more stable when it moves horizontally.

[0025] Example 5, as Figure 3 、 Figure 4 As shown, on the basis of the above embodiment, it also includes that the surface of the steering roller 25 is adhered with a sealing plate 24, the sealing plate 24 is fixedly connected to the dipping box 1, the surface of the steering roller 25 is adhered with a partition 23, the partition 23 is fixedly connected to the dipping box 1, and the sealing plate 24 is fixedly connected to the partition 23. The dipping room inside the dipping box 1 is sealed by the partition 23 and the sealing plate 24 to prevent external air from entering the dipping room, thereby avoiding the problem of needing to extract air before dipping the motor each time, reducing the complexity during use and reducing energy consumption.

[0026] Example 6: Figure 5As shown, on the basis of the above embodiment, it also includes that the surface of the steering roller 25 is attached with a scraper 3, the interior of the scraper 3 is provided with a drainage groove 31, and one side of the scraper 3 is fixedly connected to a connecting plate 32, the connecting plate 32 is attached to the sealing plate 24, and two groups of bolts 33 are inserted into the interior of the connecting plate 32, and the two groups of bolts 33 are threadedly connected to the sealing plate 24. When the motor is restored to its original position after the dipping is completed, the scraper 3 is rotated to scrape off the paint liquid attached to its surface, so as to prevent the paint liquid from remaining on the surface of the steering roller 25 and causing the size of the steering roller 25 to change.

[0027] Example 7, as Figure 1 、 Figure 2 As shown, on the basis of the above embodiment, it also includes that the interior of the dipping box 1 is fixedly installed with an air outlet 21, the interior of the dipping box 1 is fixedly installed with a heating tube 22, the surface of the dipping box 1 is fixedly installed with a box door 14, the interior of the box door 14 is fixedly installed with an observation window 15, the surface of the box door 14 is fixedly installed with a handle 16, the surface of the dipping box 1 is fixedly installed with a controller 11, the surface of the controller 11 is fixedly installed with a display screen 12, the surface of the controller 11 is fixedly installed with a button 13, and the lower surface of the dipping box 1 is fixedly installed with four groups of bases 17, and the four groups of bases 17 are all located in the same horizontal plane. The air outlet 21 and the heating tube 22 can dry the motor after dipping, and the observation window 15 can facilitate the staff to observe the motor during drying. At the same time, the speed, drying temperature, etc. of the device can be adjusted by the controller 11.

[0028] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fast-drying dipping device for automobile motor production, comprising a dipping box (1), characterized in that: A dipping mechanism (2) is provided inside the dipping box (1), and the dipping mechanism (2) includes a steering roller (25), a servo motor (26), a rotating rod (27), an air intake (28), a fixed plate (29), a vacuum pump (210) and an exhaust pipe (211), wherein the servo motor (26) is fixedly connected to the dipping box (1), the output shaft of the servo motor (26) is fixedly connected to the rotating rod (27), the rotating rod (27) is rotatably connected to the dipping box (1), the rotating rod (27) is fixedly connected to the steering roller (25), the steering roller (25) is in contact with the inner wall of the dipping box (1), the fixed plate (29) is fixedly connected to the dipping box (1), the fixed plate (29) is fixedly connected to the air intake (28), the vacuum pump (210) is fixedly connected to the fixed plate (29), and the exhaust pipe (211) is fixedly connected to the vacuum pump (210); The interior of the steering roller (25) is fitted with a bottom plate (41), and the upper surface of the bottom plate (41) is provided with a fixing mechanism (4), wherein the fixing mechanism (4) includes a receiving plate (42), a frame (43), a knob (45), a clamping claw (46), a slider (47), and a bidirectional threaded rod (48).

2. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: The frame (43) is fixedly connected to the base plate (41), the bidirectional threaded rod (48) is rotatably connected to the frame (43), the bidirectional threaded rod (48) is threadedly connected to the slider (47), the knob (45) is fixedly connected to the bidirectional threaded rod (48), the receiving plate (42) is fixedly connected to the slider (47), the receiving plate (42) is in contact with the inner wall of the frame (43), and the clamping claw (46) is fixedly connected to the receiving plate (42).

3. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: Two groups of fixed blocks (44) are fixedly connected to the lower surface of the base plate (41), and the interiors of the two groups of fixed blocks (44) are clamped with clamping blocks (54). The inner sides of the clamping blocks (54) are fixedly connected with an insertion rod (53), and the insertion rod (53) is slidably plugged into the fixed blocks (44). The lower end of the insertion rod (53) is rotatably connected to a receiving block 2 (56), and a servo motor 2 (55) is fixedly installed on the lower surface of the receiving block 2 (56), and the output shaft of the servo motor 2 (55) is fixedly connected to the insertion rod (53).

4. The rapid drying dipping coating device for automobile motor production according to claim 3, characterized in that: The lower surface of the receiving block 2 (56) is fixedly connected to a plurality of connecting rods (52), and the lower ends of the plurality of connecting rods (52) are fixedly connected to the receiving block 1 (51). An electric telescopic rod (5) is fixedly installed inside the dipping box (1), and the output end of the electric telescopic rod (5) is fixedly connected to the receiving block 1 (51).

5. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: Two groups of slide bars (49) are fixedly connected to the interior of the frame (43), and two slide bars (49) are slidably connected to the surfaces of the two groups of slide bars (49). The two slide bars (410) are fixedly connected to the receiving plate (42), and the two slide bars (410) are in contact with the inner wall of the frame (43).

6. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: The surface of the steering roller (25) is bonded with a sealing plate (24), and the sealing plate (24) is fixedly connected to the dipping box (1). The surface of the steering roller (25) is bonded with a partition (23), and the partition (23) is fixedly connected to the dipping box (1). The sealing plate (24) is fixedly connected to the partition (23).

7. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: A scraper (3) is attached to the surface of the steering roller (25), a drainage groove (31) is provided inside the scraper (3), a connecting plate (32) is fixedly connected to one side of the scraper (3), the connecting plate (32) is attached to the sealing plate (24), two groups of bolts (33) are inserted into the interior of the connecting plate (32), and the two groups of bolts (33) are threadedly connected to the sealing plate (24).

8. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: An air outlet (21) is fixedly installed inside the dipping box (1), and a heating pipe (22) is fixedly installed inside the dipping box (1).

9. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: A box door (14) is fixedly mounted on the surface of the dipping box (1), an observation window (15) is fixedly mounted inside the box door (14), and a handle (16) is fixedly mounted on the surface of the box door (14).

10. The rapid drying dipping coating device for automobile motor production according to claim 1, characterized in that: A controller (11) is fixedly mounted on the surface of the dipping box (1), a display screen (12) is fixedly mounted on the surface of the controller (11), and a button (13) is fixedly mounted on the surface of the controller (11). Four groups of bases (17) are fixedly mounted on the lower surface of the dipping box (1), and the four groups of bases (17) are all located on the same horizontal plane.

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