Automatic coating and drying device for outer ring positioning surface coating of fixed end joint

Abstract

According to the technical scheme, the automatic coating and drying device comprises an automatic coating system and a drying system, the automatic coating system comprises a support, a working table plate, a disc body and a positioner, the positioner is connected with the disc body in a sliding mode, and a laser sensor is fixedly installed on the positioner; a gear motor and a lifting cylinder are arranged below the working table plate, the gear motor is fixedly connected with the disc body, and a telescopic end of the lifting cylinder is fixedly connected with the positioner; the working table plate is further fixedly provided with a thrust air cylinder, the thrust air cylinder is fixedly connected with the arc-shaped push plate, the working table plate is further fixedly provided with a vertical plate, a limiting stopper A, a limiting stopper B, a friction box and a rotating air cylinder, a brush is fixedly arranged on a rotating shaft, the drying system comprises a furnace body, an electric control cabinet and a gravity sliding way, and the gravity sliding way is fixedly connected with a disc body. And a movable mesh belt is arranged between the heating box at the upper part of the furnace body and the furnace body. According to the device, the outer ring positioning surface can be coated with the friction coating on line, and the coating is uniform and efficient to dry.

Description

Technical Field

[0001] The utility model relates to coating and heating equipment, in particular to an automatic coating and drying device for the positioning surface of an outer ring of a fixed end section of a transmission shaft. Background Art

[0002] The constant velocity universal joint drive shaft in a car consists of a fixed end joint, an intermediate shaft, and a movable end joint. The movable end joint is connected to the engine, while the fixed end joint is directly connected to the car's wheel hub. Engine power is transmitted through the movable end joint, intermediate shaft, and fixed end joint to the wheels, driving them. The fixed end joint is connected to the wheel hub via splines and internal threads on the shank of the outer ring. This creates significant friction between the outer ring's locating surface and the wheel hub end face during vehicle starting and braking, resulting in loud noises and customer dissatisfaction.

[0003] To eliminate the abnormal noise, the method of applying Molykote to the outer ring positioning surface before assembly is adopted. The outer ring positioning surface must be evenly coated with Molykote and must be dry. To ensure the uniformity of Molykote, a manual method is adopted: first apply one coat, wait two hours for it to dry, then apply a second coat, and wait another two hours for it to dry before assembly. If only one coat is applied, the coating will be uneven, and secondly, the Molykote coating is relatively thick and not completely dry inside. As a result, the Molykote will not function properly after assembly, and the abnormal noise will still not be eliminated. It may even occur when the vehicle rolls off the production line at the main engine factory, which risks the main engine factory shutting down the production line or even recalling the vehicle. The drive shaft with unqualified coating needs to be dismantled and returned to the factory for re-coating, which wastes manpower, material resources and costs.

[0004] Molykote was previously applied manually, with a secondary application and drying process. This was labor-intensive and resource-intensive, with waiting times of up to four hours. Furthermore, the drying process required significant material floor space, disrupted logistics, and resulted in bumps and collisions. This led to long turnaround times, a high volume of work-in-progress, and potentially high quality risks, impacting delivery cycles and resulting in significant unit losses. Therefore, a Molykote coating machine was urgently needed at the assembly site that could both ensure quality and improve efficiency. Summary of the Invention

[0005] The purpose of the utility model is to provide an automatic coating and drying device for the outer ring positioning surface of a fixed end section, which can apply Molykote coating to the outer ring positioning surface online at the assembly site, not only ensuring uniform coating but also efficient drying.

[0006] The technical solution of the utility model is: an automatic coating and drying device for the positioning surface coating of the outer ring of the fixed end section, including an automatic coating system and a drying system, the automatic coating system including a bracket, a work table fixedly mounted on the bracket, a rotating connecting disc body mounted on the work table, a positioner provided on the upper end of the disc body, the positioner is slidably connected to the disc body, and a laser sensor is fixedly mounted on the positioner; a clearance hole is provided at the center of the work table, a reduction motor is mounted under the work table, the reduction motor housing is fixedly connected to the bracket, and the rotating end of the reduction motor is fixedly connected to the disc body through the clearance hole on the work table; a lifting cylinder is provided in the rotating end of the reduction motor, the fixed end of the lifting cylinder is fixedly connected to the rotating end of the reduction motor, and the telescopic end of the lifting cylinder is fixedly connected to the positioner; a thrust cylinder is also fixedly mounted on the work table, and the telescopic end of the thrust cylinder is fixedly connected to the arc-shaped push plate, The workbench is also fixedly equipped with a vertical plate, a limiter A, a limiter B, and a Molykote box. The vertical plate is fixedly equipped with a rotating cylinder. The rotating end of the rotating cylinder is fixedly equipped with a rotating shaft. The rotating shaft is fixedly equipped with a brush rod. The brush rod is fixedly equipped with a brush. The rotating end of the rotating cylinder is also fixedly equipped with a stopper A and a stopper B. The drying system includes a furnace body and an electric control cabinet. The inlet side of the furnace body is fixedly connected to the disc body through a gravity slide. A heating box is provided on the upper part of the furnace body. A movable mesh belt is provided between the heating box and the furnace body. A thermocouple sensor is provided on the heating box. A touch screen and an sound and light alarm are provided on the top surface of the electric control cabinet. A start button and an emergency stop button are provided on the touch screen.

[0007] The electric control cabinet is equipped with a controller, and the reduction motor, rotary cylinder, lifting cylinder, thrust cylinder, thermocouple sensor, laser sensor, touch screen, and sound and light alarm are electrically connected to the controller through signal lines.

[0008] The principle of the utility model is that during the automatic rotation of the outer ring of the fixed end section, a brush is used to automatically apply paint to the positioning surface of the outer ring to maintain the application quality; after application, a heating box with temperature control and mesh belt speed control is used for rapid drying.

[0009] The advantages of the present invention are that it can efficiently and automatically apply Molykote to the positioning surface of the outer ring of the fixed end section of the transmission shaft and automatically and quickly heat and dry it. In the past, the outer ring positioning surface was manually applied with Molykote twice, and the process of waiting for drying twice resulted in quality problems such as uneven application, incomplete drying, long waiting time, large workshop area occupation, chaotic logistics, and turnover collisions. There was also the risk of unqualified products being assembled and shipped to the main engine factory. The present invention provides a machine that is urgently needed at the assembly site and can efficiently and effectively apply Molykote to the positioning surface of the outer ring and dry it. Manual application and natural drying twice takes 4 hours, while the automatic application and rapid heating and drying cycle adopted by the present invention is 5 minutes, which is 48 times more efficient. At the same time, the application is uniform, quality is guaranteed, labor is liberated, site occupation is reduced, chaotic logistics and collisions are avoided, rework is avoided, customer satisfaction is increased, and the core competitiveness of the enterprise is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the automatic coating and drying device for the positioning surface of the outer ring of the fixed end section of the utility model.

[0011] Figure 2 yes Figure 1 Top view of .

[0012] Figure 3 It is a schematic diagram of the outer ring of the fixed end section.

[0013] Figure 4 yes Figure 3 AA cross-section diagram.

[0014] Figure 5 yes Figure 1 Enlarged view of part I in the middle.

[0015] In the figure: 1 mesh belt outlet, 2 electric control cabinet, 3 start button, 4 emergency stop button, 5 touch screen, 6 sound and light alarm, 7 heating box, 8 thermocouple sensor, 9 mesh belt inlet, 10 gravity slide, 11 disc, 12 positioner, 13 laser sensor, 14 outer ring, 15 arc push plate, 16 limiter B, 17 vertical plate, 18 rotating shaft, 19 rotating cylinder, 20 stopper A, 21 limiter A, 22 brush rod, 23 brush, 24 Molykote liquid level, 25 Molykote box, 26 workbench, 27 bracket, 28 stopper B, 29 lifting cylinder, 30 reduction motor, 31 furnace body, 32 mesh belt, 33 outer ring positioning surface, 34 thrust cylinder, 35 brush smearing position, 36 large end surface, 37 inner cylindrical surface. DETAILED DESCRIPTION

[0016] The fixed end is an important component of the constant velocity universal joint drive shaft of a car. The automatic coating and drying device for the positioning surface coating of the outer ring of the fixed end joint of the utility model includes an automatic coating system and a drying system. The automatic coating system includes a bracket 27, a work table 26 is fixedly mounted on the bracket, a rotating connecting disc body 11 is mounted on the work table, a positioner 12 is provided on the upper end of the disc body, the positioner is slidably connected to the disc body 11, and a laser sensor 13 is fixedly mounted on the positioner; a clearance hole is provided in the center of the work table 26, a reduction motor 30 is mounted under the work table 26, the reduction motor housing is fixedly connected to the bracket 27, and the rotating end of the reduction motor is fixedly connected to the disc body 11 through the clearance hole on the work table; a lifting cylinder 29 is provided in the rotating end of the reduction motor 30, the fixed end of the lifting cylinder is fixedly connected to the rotating end of the reduction motor 30, and the telescopic end of the lifting cylinder is fixedly connected to the positioner 12; a thrust cylinder 34 is also fixedly mounted on the work table 26, and the telescopic end of the thrust cylinder is fixedly connected to the arc-shaped push plate 15, The workbench 26 is also fixed with a vertical plate 17, a limiter A21, a limiter B16, and a Molykote box 25. The vertical plate is fixed with a rotating cylinder 19. The rotating end of the rotating cylinder 19 is fixed with a rotating shaft 18, the rotating shaft is fixed with a brush rod 22, the brush rod is fixed with a brush 23, and the rotating end of the rotating cylinder is also fixed with a stopper A20 and a stopper B28; the drying system includes a furnace body 31 and an electric control cabinet 2, the inlet side of the furnace body is fixedly connected to the disc body 11 through a gravity slide 10, a heating box 7 is provided on the upper part of the furnace body, a movable mesh belt 32 is provided between the heating box and the furnace body, and a thermocouple sensor 8 is provided on the heating box; a touch screen 5 and an audible and visual alarm 6 are provided on the top surface of the electric control cabinet, and a start button 3 and an emergency stop button 4 are provided on the touch screen.

[0017] The electric control cabinet is equipped with a controller, and the reduction motor 30, rotating cylinder 19, lifting cylinder 29, thrust cylinder 34, thermocouple sensor 8, laser sensor 13, touch screen 5, and sound and light alarm 6 are electrically connected to the controller through signal lines.

[0018] The working process of the present invention is as follows: press the start button 3, the heating rod in the heating box 7 starts to heat rapidly, and the mesh belt 32 starts to move at the set speed. The outer ring is placed on the positioner 12, the positioner is located inside the inner cylindrical surface 37, and the large end surface 36 contacts the disc body 11. When the laser sensor 13 detects the outer ring 14 (workpiece), the reduction motor 30 drives the disc body, the positioner 12 and the outer ring to rotate at the set speed; synchronously, the rotating cylinder 19 drives the rotating shaft 18, the brush rod 22 and the brush 23 dipped in molybdenum from the starting position (block A20 contacts the limiter A21), and rotates counterclockwise at the set speed until the block B28 contacts the limiter B16. At this time, the front half of the brush just contacts the outer ring positioning surface 33 and forms a certain angle, and the outer ring positioning surface is coated with molybdenum. When the coating reaches the set time, the rotating cylinder 19 drives the rotating shaft 18 The brush rod 22 and brush 23 rotate clockwise, leaving the outer ring positioning surface 33 until the block A20 contacts the limiter A21, at which point part of the brush is immersed in the molybdenum liquid again. Simultaneously, the reduction motor 30 stops rotating and reverses to its initial position. The telescopic end of the lifting cylinder 29 drives the positioner 12 back into the disc body 11. The telescopic end of the thrust cylinder 34 drives the arc-shaped push plate 15 to push the outer ring onto the gravity slide 10. The telescopic end of the thrust cylinder 34 drives the arc-shaped push plate 15 back to its original position. The telescopic end of the lifting cylinder 29 drives the positioner 12 to rise, and the outer ring enters the mesh belt inlet 9 along the gravity slide. As the mesh belt 32 moves, the outer ring is brought into the heating box 7 for heating and drying. The outer ring to be coated with molybdenum is placed on the positioner 12, and the outer ring positioning surface 33 is coated and dried according to the same steps as above. The temperature in the heating chamber 7 is set to the desired temperature based on feedback from the thermocouple sensor 8 (the start button 3 can be pressed a few minutes in advance to preheat the heating chamber to the desired temperature). The temperature in the heating chamber must not exceed the tempering temperature of the outer ring 14 to prevent degradation of the surface hardness of the quenched surface. In actual use, the speed of the mesh belt 32 is determined based on the drying conditions of the molykote. The depth of the brush 22's entry into the molykote liquid level 24 and its angle of inclination relative to the outer ring's positioning surface 33 are adjusted by adjusting the heights of stoppers A21 and B16. After drying, the outer ring 14 can be cooled by a fan to facilitate subsequent assembly.

Claims

1. Automatic coating and drying device for the positioning surface of the outer ring of the fixed end section, characterized by: The invention comprises an automatic coating system and a drying system, wherein the automatic coating system comprises a bracket (27), a workbench (26) is fixedly mounted on the bracket, a rotating connecting disc body (11) is mounted on the workbench, a positioner (12) is provided on the upper end of the disc body, the positioner is slidably connected to the disc body (11), and a laser sensor (13) is fixedly mounted on the positioner; a clearance hole is provided at the center of the workbench (26), a reduction motor (30) is mounted below the workbench (26), the reduction motor housing is fixedly connected to the bracket (27), and the rotating end of the reduction motor is fixedly connected to the disc body (11) through the clearance hole on the workbench; a lifting cylinder (29) is provided in the rotating end of the reduction motor (30), the fixed end of the lifting cylinder is fixedly connected to the rotating end of the reduction motor (30), and the telescopic end of the lifting cylinder is fixedly connected to the positioner (12); a thrust cylinder (34) is also fixedly mounted on the workbench (26), and the telescopic end of the thrust cylinder is fixedly connected to the arc-shaped push plate (15). The workbench (26) is also fixedly provided with a vertical plate (17), a stopper A (21), a stopper B (16), and a Molykote box (25). A rotary cylinder (19) is fixedly provided on the vertical plate. A rotating shaft (18) is fixedly provided on the rotating end of the rotary cylinder (19). A brush rod (22) is fixedly provided on the rotating shaft. A brush (23) is fixedly provided on the brush rod. A stopper A (20) and a stopper B (28) are also fixedly provided on the rotating end of the rotary cylinder. The drying system comprises a furnace body (31) and an electric control cabinet (2). The inlet side of the furnace body is fixedly connected to the disc body (11) through a gravity slide (10). A heating box (7) is provided on the upper part of the furnace body. A movable mesh belt (32) is provided between the heating box and the furnace body. A thermocouple sensor (8) is provided on the heating box. A touch screen (5) and an audible and visual alarm (6) are provided on the top surface of the electric control cabinet. A start button (3) and an emergency stop button (4) are provided on the touch screen.

2. The automatic coating and drying device for the positioning surface of the outer ring of the fixed end section according to claim 1 is characterized in that: The electric control cabinet is equipped with a controller, and the reduction motor (30), the rotary cylinder (19), the lifting cylinder (29), the thrust cylinder (34), the thermocouple sensor (8), the laser sensor (13), the touch screen (5), and the sound and light alarm (6) are electrically connected to the controller through signal lines.

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