Protective cover of automatic polishing device for automobile paint surface

Abstract

The utility model discloses a protective cover of an automatic polishing device for an automobile paint surface. The protective cover comprises a fixing assembly and a brush assembly. The fixing assembly is of a hollow structure and comprises a round pipe and a horn mouth which are connected into a whole, and the round pipe can be connected to a polishing head of the automatic polishing device for the automobile paint surface; the brush assembly comprises a base part and a brush formed to one end of the base part; the base part is of a soft body structure and can surround the circular tube in the circumferential direction, and the brush can be unfolded in the expansion direction of the horn mouth; the brush has a preset thickness, so that after the brush assembly is unfolded along the side surface of the horn mouth, the tail end of the brush cannot generate a brush gap due to enlargement of the unfolded circumference; the length of the brush is larger than the quotient of the distance from the horn mouth starting position to the bottom face of the automobile paint face automatic polishing device and the cosine of the included angle between the side face of the horn mouth and the axis of the horn mouth. According to the scheme, the brush can be in inclined contact with the working face, so that the protection cover is matched with the working face more friendly, and the shielding rate of splash is higher; meanwhile, disassembly and assembly are convenient, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the field of automatic grinding and polishing in automobile manufacturing, in particular to a protective cover of an automatic polishing device for automobile paint surfaces. Background Art

[0002] In the painting process of automobile manufacturing, the painted body in white will enter the paint inspection station to detect and repair the paint defects of the body. With the continuous advancement of industrial automation, the repair of paint defects of the body is now completed by robots, which repair paint defects by automatically grinding and polishing the defect points.

[0003] During the automatic polishing process of the robot, since the polishing pad needs to rotate at a high speed (4500rpm-6000rpm), polishing dust and polishing liquid will inevitably splash to other parts of the car body with the rotation of the polishing pad, especially when polishing defect points near the edge lines of the car body, even the entire car body surface (including the normal non-polishing area of ​​the car body paint) will be covered with polishing dust and polishing liquid / paste, so that the polishing dust and polishing liquid / paste on the car body need to be wiped clean manually with a rag, which greatly increases the workload of workers and improves the work intensity of workers.

[0004] At present, most automobile production lines use the following two methods to prevent dust splashing during automatic polishing:

[0005] 1. Use a vacuum cleaner to solve the problem of polishing dust and polishing liquid splashing, but the polishing dust and polishing liquid thrown out are mostly in a wet state and have a strong adhesion ability. They adhere to the surface of the car body. Even with a powerful vacuum cleaner, the polishing liquid and polishing dust cannot be cleaned up, and only a small amount of smaller dry dust can be sucked away;

[0006] 2. A metal cover is installed at the working end of the polishing tool to block polishing dust and prevent splashing. Although this method can prevent splashing, the overall weight of the cover is heavy. When it is installed at the working end of the polishing tool, it will increase the weight of the working end of the polishing tool, causing the force output by the force control device at the working end of the polishing tool to be affected and unable to accurately control the polishing force, resulting in polishing defects; at the same time, the metal cover also has the risk of damaging the paint surface of the car body. In the event of debugging failure or operating error, the metal cover will contact the paint surface of the car body, which is easy to cause damage to the paint surface of the car body.

[0007] In order to solve the above problems, the patent document with patent authorization announcement number CN113640317B discloses that a grinding and polishing spray chamber is set on the periphery of the grinding and polishing tool, and circumferentially distributed soft brushes are provided on the lower edge of the grinding and polishing spray chamber to achieve splash shielding; however, this method often causes problems such as misalignment and deformation of the soft brush during actual use because the soft brush is directly perpendicular to the working surface; in addition, the soft brush in this solution is short in length and does not cooperate well with the working surface. Summary of the invention

[0008] In order to solve the above technical problems, the utility model provides a protective cover for an automatic automobile paint polishing device, which can be highly adapted to the working surface, effectively shield the splash of polishing dust, avoid large-area dirt, and is easy to disassemble and assemble and easy to use.

[0009] To this end, the technical solution of the utility model is as follows:

[0010] A protective cover of an automatic car paint polishing device, comprising a fixing assembly and a brush assembly; the fixing assembly is a hollow structure, comprising a circular tube and a bell mouth connected as one body, and the circular tube can be connected to a polishing head of the automatic car paint polishing device;

[0011] The brush assembly includes a base and a brush formed at one end of the base; the base is a soft structure, which can be formed along the circumference of the circular tube, and the brush can be unfolded along the expansion direction of the bell mouth; the brush has a preset thickness, which can ensure that after the brush assembly is unfolded along the side of the bell mouth, the tail end of the brush will not have a brush gap due to the increase in the unfolding circumference;

[0012] The length of the brush should meet the following conditions:

[0013] l=(d / cosα)+t;

[0014] Wherein: l is the length of the brush; d is the distance from the connection between the bell mouth and the round tube to the end of the polishing head of the automatic polishing device for automobile paint; α is the angle between the side wall of the bell mouth and the axis, t=1-10 cm.

[0015] Furthermore, in order to facilitate installation, the fixing assembly includes a first part and a second part that are symmetrical along its axis; the first part and the second part are fixedly connected by a nut after being matched.

[0016] Furthermore, in order to reduce the overall weight of the protective cover, the fixing component is a plastic fixing component, a resin fixing component, or a nylon fixing component.

[0017] Furthermore, in order to prevent the fixing component from being deformed by the environment, a plurality of reinforcing ribs are provided inside the fixing component along the circumference of the fixing component; and to facilitate installation, the inner diameter of the arc formed by the reinforcing ribs is 0.3mm to 0.8mm smaller than the outer diameter of the outer shell of the automatic polishing device for automobile paint.

[0018] Furthermore, in order to realize the rapid installation and positioning of the brush assembly on the fixing assembly, a limiting block is processed on the outer side surface of the circular tube of the fixing assembly.

[0019] Furthermore, the angle α should satisfy 5°<α<70°.

[0020] Furthermore, in order to ensure that the brush has a certain hardness so as to ensure that the protective cover can effectively shield the splashing objects, the brush is a pig bristle brush with a wire diameter of 0.1mm to 0.2mm.

[0021] Furthermore, in order to facilitate the cleaning and replacement of the brush assembly, a fastening tie or Velcro is provided at the base of the brush assembly, and the brush assembly can be separately disassembled and assembled from the fixed assembly.

[0022] Beneficial effects of the utility model:

[0023] 1. By wrapping the brush around the outside of the bell mouth of the fixed component, the brush can be in inclined contact with the working surface, effectively avoiding deformation and dislocation problems caused by vertical contact; at the same time, the design of the long brush also makes the protective cover more friendly to the working surface, and the shielding rate of splashing objects is higher;

[0024] 2. The protective cover is composed of a fixed component and a brush component. When the brush is dirty, the brush component can be disassembled and replaced separately, which is convenient for on-site use;

[0025] 3. The use of brushes instead of metal to form a protective cover effectively avoids the risk of damage to the paint surface of the car body by the metal cover; at the same time, the weight of the brush assembly is also lighter, which greatly reduces the weight of the protective cover, thereby reducing the impact of the addition of the protective cover on the force control device of the polishing tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the mechanism of the protective cover of the utility model;

[0027] Figure 2 is a longitudinal cross-sectional schematic diagram of a fixing member;

[0028] Figure 3 It is a schematic diagram of the unfolded state of the brush unit;

[0029] Figure 4 This is a schematic diagram of the installation of the protective cover in the automatic polishing device. DETAILED DESCRIPTION

[0030] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] A protective cover for an automatic polishing device for automobile paint, such as Figure 1 As shown, it includes a fixing component 1 and a brush component 2; the fixing component 1 is a hollow structure, such as Figure 2 As shown, it includes a circular tube 11 and a bell mouth 12 connected as one body; Figure 4 As shown, the round tube 11 can be connected to the polishing head of the automatic polishing device for automobile paint surface;

[0032] like Figure 3 As shown, the brush assembly 2 includes a base 21 and a brush 22 formed at one end of the base 21; the base 21 is a soft structure, which can be formed around the circular tube 11 in the circumferential direction, and the brush 22 can be unfolded along the expansion direction of the bell mouth 12; the brush 22 has a preset thickness, which can ensure that after the brush assembly 2 is unfolded along the side of the bell mouth, the tail end of the brush will not have a brush gap due to the increase in the unfolding circumference;

[0033] The length of the brush 22 should meet the following conditions:

[0034] l=(d / cosα)+t;

[0035] Wherein: l is the length of the brush 22; d is the distance from the connection between the bell mouth and the round tube to the end of the polishing head of the automatic polishing device for automobile paint surface; α is the angle between the side wall of the bell mouth and the axis, t=1-10 cm.

[0036] Specifically, because the brush 22 needs to be unfolded on the outer side of the bell mouth 12, as the diameter of the bell mouth gradually increases from top to bottom, the degree to which the brush 22 is unfolded outward also gradually increases. In order to enable the brush 22 to form a cover shell, in addition to requiring the brush 22 to be tightly formed on one side of the base 21, the brush 22 is also required to have a certain thickness to ensure that after the brush 22 is unfolded through the bell mouth at the required length, its tail end still has a tightly arranged cover shape, which can effectively block the splashing objects; therefore, the thickness of the brush 22 needs to be determined based on a comprehensive evaluation of the brush length and the α angle. In the specific implementation process, when the required brush length is 100mm and the α angle is 40°, it is more appropriate to set the brush thickness to 5mm.

[0037] Furthermore, in order to facilitate the installation of the protective cover and the automatic paint polishing device for the automobile, the fixing assembly 1 includes a first part 13 and a second part 14 symmetrical along its axis; the first part 13 and the second part 14 are fixedly connected by nuts after being matched.

[0038] Furthermore, in order to reduce the overall weight of the protective cover, the fixing component is a plastic fixing component or a resin fixing component or a nylon fixing component; and in order to prevent the fixing component from being deformed by the environment, a plurality of reinforcing ribs 15 can be provided inside the fixing component 1 along the circumference of the fixing component, and in order to facilitate installation, the inner diameter of the arc formed by the reinforcing ribs is smaller than the outer diameter of the shell of the automatic paint polishing device for the automobile by 0.3mm to 0.8mm; in the specific implementation process, if the inner diameter of the arc of the reinforcing ribs is close to the outer diameter of the shell of the automatic paint polishing device for the automobile, the fastening strength generated by the fixing component on the outer side of the shell of the automatic paint polishing device for the automobile during installation is relatively small; otherwise, it is difficult to be mounted on the outer side of the shell of the automatic paint polishing device for the automobile. Therefore, in order to achieve both the fastening installation of the fixing component and ensure that the fixing component maintains a certain fastening strength on the outer side of the shell of the automatic paint polishing device for the automobile, the inner diameter of the arc formed by the reinforcing ribs is smaller than the outer diameter of the shell of the automatic paint polishing device for the automobile by 0.5mm.

[0039] Furthermore, a limit block 3 is provided on the outer side of the circular tube of the fixed component, which can realize rapid positioning when the brush is replaced and prevent the brush from being displaced during use and affecting the output of the force of the control device.

[0040] Furthermore, in order to realize the ability to tilt and spread the brush to reduce the contact force between the brush and the paint surface of the vehicle body, combined with the tool selection of the automatic polishing device for automobile paint, the angle α should satisfy 5°<α<70°.

[0041] Furthermore, in order to ensure that the brush has good resilience, to ensure that the protective cover can effectively shield the splashing objects and to ensure the service life of the brush, the brush is a boar bristle brush with a wire diameter of 0.1mm to 0.2mm.

[0042] Furthermore, in order to facilitate the separate disassembly of the brush assembly, the base 21 of the brush assembly is provided with a fastening tie or Velcro 4, and the brush assembly 2 can be separately disassembled and assembled from the fixing assembly 1.

[0043] When installing the protective cover, first fix the round tube 11 of the fixed component 1 on the polishing head of the automatic polishing device for automobile paint; then wrap the base 21 of the brush component 2 around the lower limit block 3 on the outside of the round tube 11, and use cable ties, Velcro, hooks or screws on the base to quickly install the brush component on the fixed component by tightening it, so that the installed brush forms a trumpet-shaped protective cover on the periphery of the polishing head, and the tail end of the brush is lower than the working end face of the polishing head, ensuring that when the polishing head contacts the working surface, the protective cover formed by the brush can form a closed protection for the polishing head with the cooperation of the working surface, thereby effectively shielding the polishing splashes; when the protective cover needs to be replaced after working for a certain period of time, the brush component to be replaced can be removed by manually releasing the tightening method of the base of the brush component, and the new brush component can be fixed to the fixed component by the same tightening method, so as to realize the quick replacement of the brush component. Since the protective cover is designed as a split type, the brush assembly can be removed separately for replacement, which is convenient for on-site use. At the same time, the guide design of the bell-shaped mouth on the fixed assembly realizes the inclined contact between the brush and the working surface, effectively avoiding the deformation and dislocation problems caused by vertical contact. The design of the long brush also makes the cooperation between the protective cover and the working surface more friendly, and the shielding rate of splashing objects is higher.

[0044] 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 protective cover for an automatic polishing device for automobile paint, characterized in that: The invention comprises a fixing component (1) and a brush component (2); the fixing component (1) is a hollow structure, comprising a circular tube (11) and a bell mouth (12) connected as one body, and the circular tube (11) can be connected to the polishing head of an automatic polishing device for automobile paint surfaces; The brush assembly (2) comprises a base (21) and a brush (22) formed at one end of the base (21); the base (21) is a soft structure and can be formed around the circumference of the circular tube (11), and the brush (22) can be unfolded along the expansion direction of the bell mouth (12); the brush (22) has a preset thickness, which can ensure that after the brush assembly (2) is unfolded along the side of the bell mouth, the tail end of the brush will not have a brush gap due to the increase in the unfolded circumference; The length of the brush (22) should meet the following conditions: l = (d / cosα) + t; Wherein: l is the length of the brush (22); d is the distance from the connection between the bell mouth and the round tube to the end of the polishing head of the automatic polishing device for automobile paint surface; α is the angle between the side wall of the bell mouth and the axis, and t=1-10 cm.

2. A protective cover for an automatic automobile paint polishing device as claimed in claim 1, characterized in that: The fixing assembly comprises a first part (13) and a second part (14) which are symmetrical along the axis thereof; the first part (13) and the second part (14) are fixedly connected by a nut after being matched.

3. A protective cover for an automatic automobile paint polishing device as claimed in claim 1, characterized in that: The fixing component is a plastic fixing component, a resin fixing component or a nylon fixing component.

4. A protective cover for an automatic automobile paint polishing device as claimed in claim 3, characterized in that: A plurality of reinforcing ribs (15) are arranged inside the fixing component (1) along the circumference of the fixing component, and the inner diameter of the circular arc formed by the reinforcing ribs is 0.3 mm to 0.8 mm smaller than the outer diameter of the housing of the automatic automobile paint polishing device.

5. A protective cover for an automatic automobile paint polishing device as claimed in claim 1, characterized in that: The outer side surface of the circular tube of the fixing component is processed with a limiting block (3).

6. A protective cover for an automatic automobile paint polishing device as claimed in claim 1, characterized in that: The angle α should satisfy 5°<α<70°.

7. A protective cover for an automatic automobile paint polishing device as claimed in claim 1, characterized in that: The brush is a pig bristle brush with a wire diameter of 0.1mm to 0.2mm.

8. A protective cover for an automatic automobile paint polishing device as claimed in claim 1, characterized in that: The base (21) of the brush assembly is provided with a fastening tie or Velcro (4), and the brush assembly (2) can be independently disassembled and assembled from the fixing assembly (1).

Images