Self-rotating wiping tool

Abstract

The utility model discloses a self-rotating wiping tool which is applied to an automatic repairing station for automobile paint surface defects, is connected to the tail end of a robot and can move along with the robot according to the motion trail of the robot. Comprising a power element, a wiping tool and a rotating assembly. The wiping tool is connected to the power element through the rotating assembly; the rotating assembly comprises a connecting plate, a bearing seat, a bearing and a threaded rod; one side of the connecting plate is fixedly connected with the output end of the power element, and the other side is fixedly connected with the bearing seat; the bearing is arranged in a bearing cavity of the bearing seat and is in interference fit with the bearing seat; one end of the threaded rod is fixedly connected with the inner ring of the bearing, and the other end is screwed with the wiping tool. According to the self-rotating wiping tool, the problems that a passive wiping tool cannot rotate and is poor in wiping effect are solved; and the problems that the active wiping tool end is too heavy, and force control and robot loads are increased are solved, and the advantages of being simple in structure, good in wiping effect, low in cost and the like are achieved.

Description

Technical Field

[0001] The utility model relates to the field of automobile manufacturing automation, in particular to a self-rotating wiping tool. Background Art

[0002] In the painting process of automobile manufacturing, the white body of the car needs to be painted on the surface. After the painting is completed, the body paint defect detection and repair process will be carried out. The process is: first, the defects on the paint surface are ground off by wet sandpaper, and then the polishing paste is sprayed on the polishing area and the polishing pad is used to repair the polishing area so that the paint of the defective point after grinding is consistent with the paint around the defective point. After each grinding and polishing, the dust after grinding or polishing needs to be wiped clean with a wiping tool to ensure that the subsequent processes can proceed smoothly.

[0003] Currently, there are two types of automatic wiping tools after grinding and polishing:

[0004] 1. Passive automatic wiping tool. After the wiping cloth is set, the automatic wiping tool is directly connected to the force output end of the robot. When wiping, the robot track is used to achieve automatic wiping. In this method, since the wiping tool and the robot force output end are rigidly connected and cannot rotate, dust is easily accumulated on one side of the wiping cloth during wiping. The wiping cloth cannot absorb the dust after grinding or polishing, resulting in poor wiping effect and even affecting the normal progress of subsequent processes.

[0005] 2. Active wiping tools: by installing pneumatic tools or motors between the automatic wiping tool and the force output end of the robot, the automatic wiping tool can realize self-rotation under the drive of pneumatic or motor. Although this wiping method can wipe relatively cleanly, the active wiping tool needs to use a motor or pneumatic tool, which will cause the wiping tool end to be heavy and require external air pipes, cables, etc., increasing the load on the force control device and the robot. At the same time, the use of active wiping tools is expensive, and it is also necessary to increase the components of the control part, so the cost performance is low. Summary of the invention

[0006] In order to solve the above technical problems, the utility model provides a self-rotating wiping tool, which can realize the self-rotation of the wiping tool without an external motor or pneumatic tool, thereby achieving a better wiping effect.

[0007] To this end, the technical solution is as follows:

[0008] A self-rotating wiping tool, used in an automatic repair station for automobile paint defects, connected to the end of a robot, and capable of moving along with the robot along its motion trajectory; comprising a power element, a wiping tool and a rotating assembly; the wiping tool is connected to the power element via the rotating assembly;

[0009] The rotating assembly includes a connecting plate, a bearing seat, a bearing and a threaded rod; one side of the connecting plate is fixedly connected to the output end of the power element, and the other side is fixedly connected to the bearing seat; the bearing is arranged in the bearing cavity of the bearing seat and has an interference fit with the bearing seat; one end of the threaded rod is fixedly connected to the inner ring of the bearing, and the other end is threadedly connected to the wiping tool.

[0010] Furthermore, in order to reduce the influence of the torsional moment on the life of the power element during use, the power element is a double guide rod cylinder or a slide cylinder.

[0011] Furthermore, in order to achieve axial limitation of the bearing and improve the overall stability of the device, the bearing seat is provided with a retaining ring groove in the bearing cavity close to the side of the connecting plate, and a retaining ring for a hole is provided in the retaining ring groove.

[0012] Furthermore, the wiping tool includes a base plate and a sponge; the base plate is circular, one side of which is provided with a threaded hole connected to a threaded rod, and the sponge is detachably connected to the other side of the base plate.

[0013] Furthermore, in order to facilitate cleaning of the wiping end surface of the wiping tool, the wiping tool also includes a wiping cloth; the wiping cloth is sleeved on the outside of the sponge and the substrate to wrap the two; when the wiping cloth is dirty, it can be removed from the sponge and the substrate and replaced with a clean wiping cloth to ensure that the end surface of the wiping tool is clean.

[0014] By setting a rotating assembly between the wiping tool and the power element, when the wiping tool is driven by the robot to contact the car body for wiping work, the friction force generated between the wiping tool and the car body will act on the threaded rod of the bearing assembly through the wiping tool, and then act on the bearing, so that the bearing rotates, thereby realizing the self-rotation of the wiping tool fixedly connected to the threaded rod of the bearing assembly. Therefore, the beneficial effects of the utility model are: ① It solves the problem that the passive wiping tool cannot rotate after grinding and polishing at the automatic repair station of the car paint surface, resulting in poor wiping effect; ② It avoids the problem that the active wiping tool end is too heavy, which increases the force control and robot load; ③ It has the advantages of simple structure, good wiping effect, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a partial cross-sectional structure of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the rotating component. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] A self-rotating wiping tool is used in the automatic repair station of automobile paint defects. It is connected to the end of a robot and can move along with the robot along its motion trajectory; Figure 1 As shown, it includes a power element 1, a wiping tool 2 and a rotating assembly 3; the wiping tool is connected to the power element through the rotating assembly;

[0019] The rotating assembly 3 includes a connecting plate 31, a bearing seat 32, a bearing 33 and a threaded rod 34; one side of the connecting plate 31 is fixedly connected to the output end of the power element 1, and the other side is fixedly connected to the bearing seat 32; the bearing 33 is arranged in the bearing cavity 321 of the bearing seat 32, and has an interference fit with the bearing seat 32; one end of the threaded rod 34 is fixedly connected to the inner ring of the bearing 33, and the other end is threadedly connected to the wiping tool 2.

[0020] like Figure 2 As shown, the bearing seat 32 is provided with a retaining ring groove 322 in the bearing cavity 321 on the side close to the connecting plate 31, and a hole retaining ring 4 is provided in the retaining ring groove; a stepped hole is provided at the end of the bearing cavity 321 away from the connecting plate 31; when the bearing 33 enters the bearing cavity 321 from the opening of the bearing cavity 321 on the side close to the connecting plate, its front end face is just stuck on the step surface of the stepped hole, and then the hole retaining ring 4 is installed in the retaining ring groove 322, the bearing 33 will be axially limited under the action of the hole retaining ring 4 and the step surface of the stepped hole, thereby improving the stability of the device.

[0021] The wiping tool 2 includes a base plate 21 and a sponge 22; the base plate 21 is circular, and one side of the base plate is provided with a threaded hole connected to the threaded rod 34. The sponge 22 is installed on the other side of the base plate 21 by a detachable connection method such as Velcro or a snap. Because it has good water absorption and appropriate hardness, it comes into direct contact with the vehicle body during wiping, and can well absorb dirt such as isopropyl alcohol and polishing liquid on the surface of the vehicle body.

[0022] In addition, in order to better absorb dust and dirt on the vehicle body, the wiping tool 2 also includes a wiping cloth 23; the wiping cloth 23 is sleeved on the outside of the sponge 22 and the substrate 21, and an elastic band is provided on its edge. When the elastic band is in a free state, the circumference of the wiping cloth edge is smaller than the circumference of the substrate, and when the elastic band is in a stretched state, the circumference of the wiping cloth edge can be larger than the circumference of the substrate, thereby wrapping the substrate and the sponge; in the specific implementation of this solution, when the wiping tool needs to be replaced after working for a period of time, only the wiping cloth 23 needs to be replaced, and there is no need to disassemble the sponge 22, which is more convenient and efficient to use. In order to cope with the torsional moment generated during wiping and prevent the service life of the power element 1 from being reduced due to the torque generated during wiping, in the specific implementation process, the power element 1 should use a double guide rod cylinder or a slide cylinder with strong torsion resistance.

[0023] When the self-rotating wiping tool performs wiping work, the wiping tool 2 contacts the car body, and the two form relative motion under the drive of the robot, thereby generating friction between the two. The friction will act on the threaded rod 34 of the bearing assembly through the wiping tool 2, and then act on the bearing 33, causing the bearing 33 to rotate in the bearing seat 32, thereby driving the wiping tool 2 fixedly connected to the threaded rod 34 of the bearing assembly to rotate, thereby realizing the self-rotation of the wiping tool 2.

[0024] This embodiment not only solves the problem that the passive wiping tool cannot rotate after grinding and polishing at the automatic repair station of the automobile paint, resulting in poor wiping effect; it also avoids the problem that the active wiping tool end is too heavy, which increases the force control and robot load, and has the advantages of simple structure, good wiping effect and low cost.

[0025] The foregoing description of the specific exemplary embodiments of the utility model is presented for the purpose of illustration and description. The foregoing description is not intended to be exhaustive, nor is it intended to limit the utility model to the precise form disclosed, and it is obvious that many changes and variations are possible based on the above teachings. The exemplary embodiments are selected and described in order to explain the specific principles of the utility model and its practical application, so that other technical personnel in the field can realize and utilize the various exemplary embodiments of the utility model and its different selected forms and modified forms. The scope of the utility model is intended to be defined by the appended claims and their equivalents.

Claims

1. A self-rotating wiping tool, used in the automatic repair station of automobile paint defects, connected to the end of a robot, and capable of moving along the robot's motion trajectory; characterized by: It comprises a power element (1), a wiping tool (2) and a rotating assembly (3); the wiping tool is connected to the power element via the rotating assembly; The rotating assembly (3) comprises a connecting plate (31), a bearing seat (32), a bearing (33) and a threaded rod (34); one side of the connecting plate (31) is fixedly connected to the output end of the power element (1), and the other side is fixedly connected to the bearing seat (32); the bearing (33) is arranged in a bearing cavity (321) of the bearing seat (32) and is interference fit with the bearing seat (32); one end of the threaded rod (34) is fixedly connected to the inner ring of the bearing (33), and the other end is threadedly connected to the wiping tool (2).

2. A self-rotating wiping tool as claimed in claim 1, characterized in that: The power element (1) is a double-guide-rod cylinder or a slide cylinder.

3. A self-rotating wiping tool as claimed in claim 1, characterized in that: The bearing seat (32) is provided with a retaining ring groove (322) in a bearing cavity (321) on a side close to the connecting plate (31), and a hole retaining ring (4) is provided in the retaining ring groove.

4. A self-rotating wiping tool as claimed in claim 1, characterized in that: The wiping tool (2) comprises a base plate (21) and a sponge (22); the base plate (21) is circular, one side of which is provided with a threaded hole connected to a threaded rod (34), and the sponge (22) is detachably connected to the other side of the base plate (21).

5. A self-rotating wiping tool as claimed in claim 4, characterized in that: The wiping tool (2) further comprises a wiping cloth (23); the wiping cloth (23) is sleeved on the outside of the sponge (22) and the base plate (21) to cover the two.

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