Coating hanger for coating production line

Abstract

The utility model discloses a coating hanger for a coating production line, which is suitable for hanging a workpiece with a central hole and comprises a hanger body, a support rod and a protective sleeve, the hanger body extends along the vertical direction, the support rod is inclined to the hanger body and extends upwards, one end of the support rod is fixed on the hanger body, and the other end of the support rod is fixed on the protective sleeve. The other end of the supporting rod forms a free end, an anti-skid part extending in the length direction of the supporting rod is arranged on the outer surface of the protective sleeve, and the protective sleeve comprises a first pipe section rotationally arranged on the supporting rod in a sleeving mode and close to the hanger body and a second pipe section fixedly arranged on the supporting rod in a sleeving mode and adjacent to the first pipe section. The sheath tube is configured to be adapted to pass through a central bore of a workpiece and to support the workpiece by the first tube section. The problem that the position of the workpiece on the coating hanging tool axially deviates due to the fact that the protective sleeve axially slides along the supporting rod due to long-time local fixed-point stress or thermal expansion deformation can be solved, and the problem that the protective sleeve is locally abraded due to circumferential rotation of the workpiece is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of surface treatment, and particularly relates to a painting fixture for a painting production line. Background Art

[0002] The fixtures on the painting production line, also known as painting fixtures or painting jigs, are designed to support, fix and convey workpieces during the painting process. These painting fixtures are usually used in conjunction with the conveying chain device on the painting production line. Through the conveying chain device, the workpieces are sequentially and orderly conveyed to various process equipment on the painting production line for corresponding surface treatment processes. Common surface treatment processes include pretreatment cleaning, surface powder spraying or painting, baking and curing, etc. Since different workpieces require different surface treatment processes, the workpiece can be transferred from the painting fixture with the workpiece mounted to a different conveying chain device by a robot. Traditional painting fixtures usually include a center-hole support fixture and a bottom support fixture. The center-hole support fixture is suitable for mounting workpieces with center holes, such as automobile wheels, flanges, gears, bearings, flywheels, etc. The center-hole support fixture usually uses a smooth support rod with a rubber sleeve wrapped around the outer wall to pass through the center hole of the workpiece, so as to support the workpiece on the painting fixture. However, when the painting fixture mounts the workpiece, there are many factors that can easily cause the position of the workpiece on the painting fixture to change. On the one hand, after the painting fixture with the workpiece mounted passes through the baking and curing equipment for baking treatment, the rubber sleeve on the support rod is prone to expansion and deformation, resulting in an increase in the gap between the rubber sleeve and the support rod, and the rubber sleeve is prone to axial slip on the support rod. On the other hand, due to the unstable center of gravity of the workpiece, it is easy to drive the rubber sleeve to axially slip along the support rod. On the other hand, due to the long-term fixed force on the rubber sleeve on the support rod, local damage to the rubber sleeve is caused, and the workpiece is prone to axially slip towards the damaged part of the rubber sleeve. And due to local damage to the rubber sleeve, the part of the support rod exposed at the damaged part of the rubber sleeve is easy to knock and damage the primer of the workpiece, and it will also cause defective products. When the workpiece is transferred by the robot, since the position of the workpiece on the painting fixture has changed, it affects the normal grasping of the workpiece by the robot, resulting in frequent robot failures, and there is a risk of the workpiece being grasped unevenly or even falling off the robot.

[0003] Therefore, there is an urgent need for a painting fixture that can provide good support for workpieces with center holes and limit the slip of the workpieces. Summary of the Utility Model

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a painting fixture for a painting production line that can provide good support for workpieces with center holes and limit the slip of the workpieces.

[0005] To this end, the utility model provides a painting fixture for a painting production line, which is suitable for mounting workpieces with center holes. The painting fixture includes:

[0006] A fixture body that extends in the vertical direction;

[0007] A support rod that extends obliquely upward with respect to the fixture body. One end of the support rod is fixed to the fixture body, and the other end of the support rod forms a free end;

[0008] A protective sleeve. An anti-slip portion extending along the length direction of the support rod is provided on the outer surface of the protective sleeve. The protective sleeve includes a first pipe section that is rotatably sleeved on the support rod and is close to the fixture body, and a second pipe section that is fixedly sleeved on the support rod and is adjacent to the first pipe section. The protective sleeve is configured to be adapted to pass through the central hole of the workpiece and support the workpiece by the first pipe section.

[0009] According to an embodiment of the present invention, the anti-slip portion includes threads provided on the outer surface of the protective sleeve and extending from the first pipe section to the second pipe section.

[0010] According to an embodiment of the present invention, the second pipe section is fixed to the free end.

[0011] According to an embodiment of the present invention, a fixing member is connected between the second pipe section and the free end. An installation hole extending toward the inside of the support rod is provided on the end surface of the free end. The second pipe section includes a closed end surface, and a through hole is provided on the closed end surface. The fixing member passes through the through hole and is fixedly connected to the installation hole.

[0012] According to an embodiment of the present invention, the length of the first pipe section is greater than the length of the second pipe section.

[0013] According to an embodiment of the present invention, a hanging portion is provided at the upper end of the fixture body.

[0014] According to an embodiment of the present invention, a support base is provided at the lower end of the fixture body.

[0015] According to an embodiment of the present invention, a reinforcing member is connected between the fixture body and the support rod. One end of the first pipe section abuts against the reinforcing member, and the other end of the first pipe section abuts against the second pipe section.

[0016] According to an embodiment of the present invention, the included angle between the support rod and the fixture body is 70° to 88°.

[0017] According to an embodiment of the present invention, the included angle between the reinforcing member and the fixture body is 37° to 40°.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] By providing an anti-slip portion extending along the length direction of the support rod on the outer surface of the protective sleeve, the sliding of the workpiece along the axial direction of the support rod on the painting hanger can be restricted. By designing the protective sleeve to be rotatably sleeved on the support rod and having a first pipe section close to the hanger body and a second pipe section fixedly sleeved on the support rod and adjacent to the first pipe section, when the painting hanger mounts the workpiece, the protective sleeve passes through the central hole of the workpiece and the first pipe section supports the workpiece. When the workpiece has a slight rotational offset on the painting hanger, the first pipe section can rotate together with the workpiece, avoiding relative friction between the part of the protective sleeve bearing the workpiece and the workpiece, which may cause local wear of the protective sleeve. Moreover, when the protective sleeve is deformed due to long-term local fixed-point stress or thermal expansion, it can restrict the axial offset of the first pipe section along the support rod, and can also extend the service life of the painting hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural view of a painting hanger with a workpiece mounted according to an embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a partial enlarged view of the area A shown in

[0022] Figure 3 is Figure 1 a side view schematic of the painting hanger with a workpiece mounted shown in

[0023] Figure 4 is Figure 1 a schematic structural view of the painting hanger shown in with the protective sleeve removed;

[0024] Figure 5 is Figure 4 a side view schematic of the painting hanger shown in with the protective sleeve removed;

[0025] Figure 6 is Figure 1 a schematic structural view of the protective sleeve of the painting hanger shown in ;

[0026] Figure 7 is Figure 1 a schematic structural view of the painting hanger with a workpiece mounted shown in being conveyed by a conveying chain device;

[0027] Figure 8 is Figure 7 a side view schematic of the painting hanger with a workpiece mounted shown in being conveyed by a conveying chain device.

[0028] 300, workpiece; 301, central hole;

[0029] 200. Conveyor chain device; 21. Chain track; 22. Conveyor chain; 23. Movable wheel; 24. Hook;

[0030] 100. Painting fixture;

[0031] 11. Fixture body; 111. Hanging part;

[0032] 12. Support rod; 121. Free end; 1211. Mounting hole;

[0033] 13. Protective sleeve; 131. Anti-slip part; 132. First pipe section; 133. Second pipe section; 1331. Closed end face; 1332. Perforation; 134. Fixing part;

[0034] 14. Reinforcing part. Detailed implementation mode

[0035] It is easy to understand that according to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various structural forms and implementation methods that can be mutually replaced. Therefore, the following detailed implementation modes and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0036] In a painting production line, when the workpiece 300 is subjected to surface process treatments such as pre-treatment cleaning, powder spraying, baking and curing, etc., the painting fixture 100 is used to mount the workpiece 300 and the painting fixture 100 is conveyed by the conveyor chain device 200 on the painting production line. Since the process treatment equipment such as pre-treatment cleaning, powder spraying and baking and curing is located in different working areas on the painting production line, at least two conveyor chain devices 200 are connected between different working areas. Between the two conveyor chain devices 200, a robot is used to clamp and transfer the workpiece 300 mounted on the painting fixture 100 of one conveyor chain device 200 to the painting fixture 100 of an adjacent another conveyor chain device 200, and the painting fixture 100 mounted with the workpiece 300 is conveyed by the another conveyor chain device 200 and continues to drive the workpiece 300 to move forward to the next surface process treatment equipment for corresponding surface process treatment. An embodiment of the present utility model takes the mounting of an automobile wheel hub as an example to specifically illustrate the structural composition and principle of the painting fixture 100. It should be noted that the workpiece 300 is not limited to an automobile wheel hub, and can also be other types of workpieces 300 with a central hole 301, such as a flange plate, a gear, a bearing, a flywheel, etc., and specific limitations are not made.

[0037] According to Figure 1 and Figure 3As shown in the figure, an embodiment of the present utility model provides a painting hanger 100 for a painting production line. The painting hanger 100 is suitable for hanging a workpiece 300 with a central hole 301. The painting hanger 100 includes a hanger body 11, a support rod 12, and a protective sleeve 13. The hanger body 11 is a rod-shaped structure extending in the up and down direction. The support rod 12 extends obliquely upward with respect to the hanger body 11. One end of the support rod 12 is fixed to the hanger body 11, and the other end of the support rod 12 forms a free end 121. The protective sleeve 13 is sleeved on the outer peripheral wall of the support rod 12. When the automobile wheel hub is hung on the painting hanger 100, the support rod 12 passes through the central hole 301 of the automobile wheel hub, and the automobile wheel hub is supported on the protective sleeve 13. In other embodiments, the hanger body 11 may also be a plate-shaped structure or a mesh structure, and there is no specific limitation.

[0038] According to Figure 2 and Figure 6 As shown in the figure, in order to limit the axial sliding of the automobile wheel hub along the support rod 12, thereby restricting the position offset of the automobile wheel hub on the painting hanger 100 and facilitating the subsequent robot to accurately grasp the automobile wheel hub when transferring the automobile wheel hub from the painting hanger 100, an anti-slip portion 131 extending along the length direction of the support rod 12 is provided on the outer surface of the protective sleeve 13. In this embodiment, the anti-slip portion 131 includes a thread provided on the outer surface of the protective sleeve 13 and extending from the first pipe section 132 to the second pipe section 133. And the thread on the outer surface of the protective sleeve 13 can be chamfered to limit the axial sliding of the automobile wheel hub on the protective sleeve 13. In other embodiments, the anti-slip portion 131 may also be a protrusion, a groove, a granular surface, or a rough texture surface provided on the outer surface of the protective sleeve 13, and there is no specific limitation.

[0039] By providing the anti-slip portion 131 extending along the length direction of the support rod 12 on the outer surface of the protective sleeve 13, the axial sliding of the automobile wheel hub on the smooth protective sleeve 13 can be restricted, thereby improving the position offset of the automobile wheel hub on the painting hanger 100.

[0040] Since the painting hanger 100 with the automobile wheel hub mounted thereon is prone to jolts and vibrations when being conveyed by the conveying chain device 200, which may cause slight rotational offset of the automobile wheel hub on the protective sleeve 13. In order to prevent relative friction between the part of the protective sleeve 13 bearing the automobile wheel hub and the automobile wheel hub, resulting in local wear of the protective sleeve 13, in this embodiment, the protective sleeve 13 includes a first pipe section 132 rotatably sleeved on the support rod 12 and close to the hanger body 11, and a second pipe section 133 fixedly sleeved on the support rod 12 and adjacent to the first pipe section 132. The protective sleeve 13 is configured to be suitable for passing through the central hole 301 of the workpiece 300 and supporting the workpiece 300 by the first pipe section 132.

[0041] By designing the protective sleeve 13 to be rotatably sleeved on the support rod 12 and including a first pipe section 132 close to the hanger body 11 and a second pipe section 133 fixedly sleeved on the support rod 12 and adjacent to the first pipe section 132, when the painting hanger 100 mounts the automobile wheel hub, the protective sleeve 13 passes through the central hole 301 of the workpiece 300 and the first pipe section 132 supports the workpiece 300. When the automobile wheel hub has a slight rotational offset on the painting hanger 100, the first pipe section 132 can rotate with the automobile wheel hub, avoiding relative friction between the part of the protective sleeve 13 bearing the automobile wheel hub and the workpiece 300 and causing local wear of the protective sleeve 13. On the one hand, it can improve the problem that the protective sleeve 13 generates axial slip relative to the support rod 12 due to long-term fixed-point force or thermal expansion and deformation, thereby restricting the axial slip of the automobile wheel hub on the protective sleeve 13. On the other hand, it can also extend the service life of the painting hanger 100.

[0042] To facilitate fixing the second pipe section 133 on the support rod 12, the second pipe section 133 is fixed to the free end 121. In this embodiment, a fixing member 134 is connected between the second pipe section 133 and the free end 121. An installation hole 1211 extending towards the inside of the support rod 12 is formed on the end face of the free end 121. The second pipe section 133 includes a closed end face 1331, and a through hole 1332 is formed on the closed end face 1331. The fixing member 134 passes through the through hole 1332 and is fixedly connected to the installation hole 1211. Among them, the fixing member 134 can be a countersunk screw, the installation hole 1211 can be a threaded blind hole matching the countersunk screw, and the through hole 1332 can be a countersunk hole. By passing the countersunk screw through the countersunk hole and threadedly mating it in the threaded blind hole, the second pipe section 133 is fixed to the free end 121 of the support rod 12. The head of the countersunk screw can be embedded in the countersunk hole of the second pipe section 133, and the head of the countersunk screw is flush with the closed end face 1331 of the second pipe section 133, making the appearance more concise. Such a fixing structure does not generate a protruding structure in the radial direction of the second pipe section 133, avoiding scratching the inner wall of the central hole 301 of the automobile wheel hub when the robot mounts the automobile wheel hub on the support rod 12 or transfers it from the support rod 12.

[0043] To minimize the wear of the protective sleeve 13 by the automobile wheel hub, the contact area between the movable part of the protective sleeve 13 and the automobile wheel hub can be increased. In this embodiment, the length of the first pipe section 132 is designed to be much greater than the length of the second pipe section 133. A small section of the protective sleeve 13 close to the free end 121 of the support rod 12 can be designed as the second pipe section 133. In other embodiments, the length of the first pipe section 132 can be 5 to 6 times the length of the second pipe section 133, and specific values are not limited.

[0044] To improve the wear resistance and high-temperature resistance of the protective sleeve 13, the protective sleeve 13 can be made of polytetrafluoroethylene material. Polytetrafluoroethylene is commonly known as Teflon and has good wear resistance, high-temperature resistance, and corrosion resistance. In other embodiments, the protective sleeve 13 can also be made of materials such as polyetheretherketone (PEEK), silicone rubber, and fluororubber, without specific limitations.

[0045] According to Figure 4 and Figure 5 As shown, in this embodiment, to facilitate the hanging of multiple vehicle wheels, two support rods 12 are provided on the hanging tool body 11 in the vertical direction. In other embodiments, only one support rod 12 or more support rods 12 can be provided on the hanging tool body 11, and the support rods 12 can be arranged horizontally or transversely along the hanging tool body 11, or vertically or longitudinally along the hanging tool body 11, without specific limitations.

[0046] To further limit the axial position offset of the vehicle wheel along the support rod 12 due to bumps and vibrations during transportation, the angle between the support rod 12 and the hanging tool body 11 is designed to be 88°. Since the support rod 12 extends obliquely upward relative to the hanging tool body 11, it can limit the offset of the vehicle wheel away from the hanging tool body 11 under the action of its own gravity. In other embodiments, by designing the degree of upward inclination of the support rod 12 relative to the hanging tool body 11, the angle between the support rod 12 and the hanging tool body 11 can be selected and designed within the range of 70° to 88°, without specific limitations.

[0047] To improve the support strength of the support rod 12, in this embodiment, a reinforcing member 14 is connected between the hanging tool body 11 and the support rod 12. One end of the first pipe section 132 abuts against the reinforcing member 14, and the other end of the first pipe section 132 abuts against the second pipe section 133. The angle between the reinforcing member 14 and the hanging tool body 11 is 37°. In other embodiments, the above angle can be adjusted by designing the connection position of the reinforcing member 14 and the support rod 12. While enhancing the support strength of the support rod 12, it can also make the area of the protective sleeve 13 that can cover the support rod 12 larger. The angle between the reinforcing member 14 and the hanging tool body 11 can be selected and designed within the range of 37° to 40°, without specific limitations.

[0048] According to Figure 7 and Figure 8As shown, the painting fixture 100 with the workpiece 300 mounted thereon can be conveyed by the conveying chain device 200. In this embodiment, the conveying chain device 200 can adopt a suspended conveying chain. The conveying chain device 200 includes a chain track 21, a conveying chain 22 laid on the chain track 21 and capable of moving along the chain track 21, and a hook 24 provided on the conveying chain 22 and used for hanging the painting fixture 100. The chain track 21 can be installed on the rack in the workshop. Movable wheels 23 are rotatably provided on the conveying chain 22, and the movable wheels 23 are in rolling contact with the chain track 21.

[0049] A hanging part 111 matching with the hook 24 is provided at the upper end of the fixture body 11. One painting fixture 100 can be hung at intervals on the conveying chain 22, and one, two or more automotive wheels can be hung on each painting fixture 100.

[0050] In other embodiments, it is not limited to using a suspended conveying chain to convey the painting fixture 100, and a ground chain can also be used. For example, a support base is provided at the lower end of the fixture body 11, and the fixture body 11 is installed on the conveying platform of the ground chain or the conveying chain 22, and the specific installation method is not limited.

[0051] The technical scope of the present utility model is not limited to the content in the above specification. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. A coating hanger for a coating production line, suitable for mounting a workpiece with a center hole, characterized in that: The coating rack comprises: A hanger body, the hanger body extending in the up-down direction; A support rod, the support rod extending upwardly from the hanger body, one end of the support rod being fixed to the hanger body, and the other end of the support rod constituting a free end; A sheath tube, wherein an anti-slip portion extending along the length direction of the support rod is arranged on the outer surface of the sheath tube, the sheath tube comprises a first tube section rotatably mounted on the support rod and close to the hanger body, and a second tube section fixedly mounted on the support rod and adjacent to the first tube section, the sheath tube being constructed to be suitable for passing through the center hole of a workpiece and for supporting the workpiece by the first tube section.

2. The painting rack according to claim 1, characterized in that: The anti-slip portion includes a thread disposed on the outer surface of the sheath tube and extending from the first tube segment to the second tube segment.

3. The painting rack according to claim 1, characterized in that: The second pipe section is fixed to the free end.

4. The painting rack according to claim 3, characterized in that: A fixing piece is connected between the second pipe section and the free end. A mounting hole extending toward the interior of the support rod is provided on the end surface of the free end. The second pipe section includes a closed end surface with a through hole provided on the closed end surface. The fixing piece passes through the through hole and is fixedly connected to the mounting hole.

5. The painting rack according to claim 1, characterized in that: The length of the first pipe section is greater than the length of the second pipe section.

6. The painting rack according to claim 1, characterized in that: The upper end of the hanger body is provided with a hanging part.

7. The painting rack according to claim 1, characterized in that: A supporting base is arranged at the lower end of the hanger body.

8. The painting rack according to claim 1, characterized in that: A reinforcement piece is connected between the hanger body and the support rod, one end of the first pipe section is in contact with the reinforcement piece, and the other end of the first pipe section is in contact with the second pipe section.

9. The painting rack according to claim 8, characterized in that: The included angle between the support rod and the hanger body is 70° to 88°.

10. The painting rack according to claim 9, characterized in that: The angle between the reinforcement and the hanger body is 37° to 40°.

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