Polyurethane polishing disc with variable polishing surface

Abstract

The utility model relates to the field of pneumatic tools and accessories, in particular to a polyurethane polishing disc with a variable polishing surface, which comprises a base, a connecting piece is arranged at the center of the back of the base, a first polyurethane layer is arranged on the front of the base, and a first magic tape layer is arranged on one side, far away from the base, of the first polyurethane layer; the outer ring seat is detachably connected with the base, a second polyurethane layer is arranged on the front face of the outer ring seat, a second hook-and-loop fastener layer is arranged on the side, away from the outer ring seat, of the second polyurethane layer, the first polyurethane layer is flush with the second polyurethane layer, and the first hook-and-loop fastener layer is flush with the second hook-and-loop fastener layer; the polishing device has the advantages that the outer ring seat detachably connected is arranged on the periphery of the base, so that the size of a polishing surface can be changed, large-area polishing can be performed when the outer ring seat is not detached, the polishing area is reduced after the outer ring seat is detached, and secondary polishing and grinding can be performed on a thin part of a workpiece and an area which is difficult to touch by a large-area polishing disc; and in the aspects of preparation and management of accessories, compared with an existing scheme, the management difficulty can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic tools and accessories, and in particular to a polyurethane polishing disc with a variable polishing surface. Background Technology

[0002] A pneumatic polishing machine is a tool that uses compressed air as a power source and is widely used for polishing and grinding the surfaces of various materials such as metal, wood, and plastic. A polyurethane polishing disc, also known as a pneumatic suction cup, is a component installed on the rotating end of the pneumatic polishing machine.

[0003] like Figure 1 and Figure 2 As shown, the existing polyurethane polishing pad includes a base, a polyurethane layer, a hook and loop fastener layer, and a polishing or grinding layer. The back of the base has a connector for fixing to the rotating end of a pneumatic polishing machine. The front of the base forms the polyurethane layer through an injection molding and foaming process. A hook and loop fastener layer is adhered to the surface of the polyurethane layer to secure the polishing or grinding layer (such as sandpaper, polishing cloth, etc.). Additionally, the polyurethane polishing pad has multiple through holes for venting, optimizing airflow, and improving heat dissipation. This polyurethane polishing pad has the following drawbacks:

[0004] 1. When polishing some workpieces, it is necessary to equip them with a variety of polishing pads of different sizes. First, a large-area polishing pad is used to quickly polish and grind the entire workpiece. Then, a small-area polishing pad is used to polish and grind the details of the workpiece and areas that are difficult to reach by the large-area polishing pad. Since the size of the polyurethane polishing pads is fixed, users need to purchase a variety of different models of polyurethane polishing pads when ordering, which increases the cost and the difficulty of warehouse management.

[0005] 2. Although multiple through holes are set, they are independent of each other. When polishing or grinding workpieces with complex shapes or uneven surfaces, the local exhaust pressure is high and a lot of heat needs to be dissipated. At this time, the polyurethane polishing pad may not dissipate heat in time, causing the polyurethane to soften and deform due to heat, reducing the adhesion between the polishing or grinding layer and the workpiece surface, and affecting the polishing or grinding effect.

[0006] 3. The base is a disc-shaped structure made of thin plastic. It has no internal reinforcement structure and the inner wall surface is smooth. It has low rigidity and is easy to deform. In addition, the bonding force between the base and the polyurethane layer needs to be improved.

[0007] 4. Different brands of pneumatic polishing machines may have different connection structures between their rotating ends and polyurethane polishing discs. Currently, the connectors on the polyurethane polishing disc base are anchored to the base and cannot be replaced. Some repair shops may have pneumatic polishing machines of multiple brands, and shop owners will also need to purchase multiple models of polyurethane polishing discs, which will cause inconvenience for later use and management.

[0008] Therefore, this case is brought. Utility Model Content

[0009] The purpose of this invention is to provide a polyurethane polishing disc with a variable polishing surface to solve the above-mentioned defects.

[0010] To achieve the above objectives, the technical solution of this utility model is as follows:

[0011] A polyurethane polishing disc with a variable polishing surface includes a base, a connector at the center of the back side of the base, a polyurethane layer 1 on the front side of the base, and a Velcro layer 1 on the side of the polyurethane layer 1 away from the base; it also includes an outer ring seat detachably connected to the base, a polyurethane layer 2 on the front side of the outer ring seat, and a Velcro layer 2 on the side of the polyurethane layer 2 away from the outer ring seat, wherein the polyurethane layer 1 and the polyurethane layer 2 are flush, and the Velcro layer 1 and the Velcro layer 2 are flush.

[0012] Furthermore, the outer circumference of the base is provided with external threads, the inner circumference of the outer ring seat is provided with internal threads, and the base and the outer ring seat are connected by threads.

[0013] Furthermore, a limiting ring extends outward from the back of the base, and corresponding screw holes are opened on the back of the limiting ring and the outer ring seat. The base and the outer ring seat are also fixed by screws.

[0014] Furthermore, the base, polyurethane layer 1, and Velcro layer 1 are provided with through holes 1. There are multiple through holes 1, which are arranged in a ring around the connector. A communication channel 1 is provided between two adjacent through holes 1.

[0015] Furthermore, the outer ring seat, the second polyurethane layer, and the second Velcro layer are provided with through holes two. There are multiple through holes two, which are arranged in a ring around the connector. A communication channel two is provided between two adjacent through holes two.

[0016] Furthermore, the front side of the base and / or the front side of the outer ring seat are provided with reinforcing ribs.

[0017] Furthermore, the reinforcing ribs on the base and / or the reinforcing ribs on the outer ring seat are provided with barbs or protrusions.

[0018] Furthermore, the connector is detachably fixed to the back of the base.

[0019] Furthermore, the connector includes, from bottom to top, an external thread seat, a disc with a diameter larger than that of the external thread seat, and a connecting shaft. The back center of the base has an internal thread hole that can be connected to the external thread seat. The upper and lower sides of the disc are integrally formed with the external thread seat and the connecting shaft, respectively. The disc and the base have corresponding screw holes on their backs. The disc and the base are fixed together by screws.

[0020] Furthermore, the connecting shaft is an externally threaded column or a cylindrical or polygonal column with an internally threaded hole.

[0021] The advantages of this utility model are:

[0022] 1. By setting a detachable outer ring seat on the outer periphery of the base, the size of the polishing surface can be varied. When the outer ring seat is not removed, large-area polishing can be performed. When the outer ring seat is removed, the polishing area is reduced, and secondary polishing and grinding can be performed on the details of the workpiece and areas that are difficult to reach by the large-area polishing pad. In terms of the preparation and management of accessories, the management difficulty can be greatly reduced compared with the existing solution.

[0023] 2. Relative to Figure 1 The independent through holes arranged in the middle are provided in this application. The connection channel connecting two adjacent through holes is provided so that the heat that cannot be discharged in time by the through holes in a local area can be discharged to other through holes through the connection channel, which further improves the heat dissipation effect.

[0024] 3. Add reinforcing ribs to the existing base structure to improve the base's resistance to deformation. At the same time, add barbs or protrusions to the reinforcing ribs and base to improve the bonding strength between the base and the polyurethane foam layer.

[0025] 4. The base and connectors are detachably connected. In addition, the product is packaged with accessories of various types of connecting shafts, which allows users to change them according to their needs. Although this slightly increases the selling price (the cost of a set of connecting shafts is about 0.3 yuan, and 3 sets are included with the product), the user experience is greatly improved. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a polyurethane polishing disc in the background art;

[0027] Figure 2 for Figure 1 An explosion diagram;

[0028] Figure 3 This is a schematic diagram of the structure of the polyurethane polishing disc in Example 1;

[0029] Figure 4 for Figure 3 An explosion diagram;

[0030] Figure 5 This is a cross-sectional view of the base and outer ring after they are connected in Example 1. The polyurethane layer and the Velcro layer are not shown in the figure.

[0031] Figure 6 This is a schematic diagram showing the arrangement of the first through hole, the second through hole, the first connecting channel, and the second connecting channel on the back of the base and the outer ring seat in Example 1.

[0032] Figure 7 This is a schematic diagram of the assembly of the connecting piece with the internally threaded hole and the base in Example 2;

[0033] Figure 8 This is a schematic diagram of the assembly of the connector with polygonal columns and the base in Example 3.

[0034] Label Explanation

[0035] 1. Base; 101. Limiting ring; 102. Screw between base and outer ring seat; 103. Through hole one; 104. Connecting channel one; 2. Connector; 201. External thread seat; 202. Disc; 203. External thread post; 204. Cylinder with internal thread hole; 205. Polygonal post; 206. Screw between connector and base; 3. Polyurethane layer one; 4. Velcro layer one; 5. Outer ring seat; 501. Through hole two; 502. Connecting channel two; 6. Polyurethane layer two; 7. Velcro layer two; 8. Reinforcing rib; 801. Barb or protrusion. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] Example 1

[0038] This embodiment proposes a polyurethane polishing disc with a variable polishing surface, such as... Figures 3 to 6 As shown, the device includes a detachably connected base 1 and an outer ring seat 5. The base 1 has an external thread on its outer circumference, and the outer ring seat 5 has an internal thread on its inner circumference. The base 1 and the outer ring seat 5 are connected by threads. Furthermore, to improve the connection strength between the base 1 and the outer ring seat 5, a limiting ring 101 extends outward from the back of the base 1. The limiting ring 101 and the outer ring seat 5 have corresponding screw holes on their backs, and the base 1 and the outer ring seat 5 are also fixed together by screws 102.

[0039] When installing the outer ring seat 5, the outer ring seat 5 is screwed in from the front side to the back side of the base 1 through the thread until the outer ring seat 5 abuts against the limiting ring 101. At this time, the screw holes on the back of the limiting ring 101 and the outer ring seat 5 are aligned. Then, screws 102 are screwed in for further fixation to prevent relative rotation between the limiting ring 101 and the outer ring seat 5.

[0040] A connector 2 is located at the center of the back of the base 1. A polyurethane layer 3 is provided on the front of the base 1, and a hook and loop layer 4 is provided on the side of the polyurethane layer 3 away from the base 1. A polyurethane layer 6 is provided on the front of the outer ring seat 5, and a hook and loop layer 7 is provided on the side of the polyurethane layer 6 away from the outer ring seat 5. The polyurethane layer 3 and the polyurethane layer 6 are flush, and the hook and loop layers 4 and 7 are flush. By providing a detachable outer ring seat 5 on the outer periphery of the base 1, the size of the polishing surface can be varied. When the outer ring seat 5 is not removed, large-area polishing can be performed. When the outer ring seat 5 is removed, the polishing area is reduced, allowing for secondary polishing and grinding of workpiece details and areas that are difficult to reach by the large-area polishing pad.

[0041] The base 1, polyurethane layer 3, and hook and loop fastener layer 4 are provided with through holes 103. Multiple through holes 103 are arranged in a ring around the connector 2, and a connecting channel 104 is provided between adjacent through holes 103. The outer ring base 5, polyurethane layer 6, and hook and loop fastener layer 7 are provided with through holes 501. Multiple through holes 501 are arranged in a ring around the connector 2, and a connecting channel 502 is provided between adjacent through holes 501. Through holes 103 are connected in series using connecting channels 104; and through holes 501 are connected in series using connecting channels 502. This allows heat that cannot be dissipated in a localized area through the through holes to be discharged to other through holes through the connecting channels, significantly improving heat dissipation.

[0042] refer to Figure 4 The front of the base 1 and the front of the outer ring seat 5 are provided with reinforcing ribs 8. The reinforcing ribs 8 are used to improve the rigidity of the base 1 and the outer ring seat 5 and reduce deformation. At the same time, the side of the reinforcing rib 8 inside the base 1 is provided with protrusions 801 (of course, protrusions can also be provided on the front of the base 1, the front of the outer ring seat 5, and the side of the reinforcing rib 8 inside the outer ring seat 5). After the polyurethane foam is injected, the connection surface between the polyurethane and the base 1, the outer ring seat 5, and the reinforcing rib 8 can be increased, thereby improving the bonding strength.

[0043] In this embodiment, the connector 2 is detachably and fixedly connected to the back of the base 1. For example... Figure 5 and Figure 6As shown, the connector 2 includes, from bottom to top, an external thread seat 201, a disc 202 with a diameter larger than that of the external thread seat 201, and a connecting shaft. The base 1 has an internal thread hole at the center of its back side that can be connected to the external thread seat 201. The upper and lower sides of the disc 202 are integrally formed with the external thread seat 201 and the connecting shaft, respectively. The disc 202 and the base 1 have corresponding screw holes on their back sides. The disc 202 and the base 1 are fixed together by screws 206.

[0044] During installation, the connector 2 is screwed onto the base 1 through the engagement of the external threaded seat 201 and the internal threaded hole of the base 1. After tightening, the disc 202 is exactly against the back of the base 1. At this time, the screw hole on the disc 202 is aligned with the screw hole on the base 1. By screwing in the screw, the connector 2 cannot be unscrewed. The pneumatic polisher is fixed to the polyurethane polishing disc through the connecting shaft.

[0045] In this embodiment, the connecting shaft is in the form of an external threaded post 203.

[0046] Example 2

[0047] This embodiment is largely the same as Embodiment 1, except that, as Figure 7 As shown, the connecting shaft in this embodiment is a cylinder 204 with an internal threaded hole.

[0048] Example 3

[0049] This embodiment is largely the same as Embodiment 1, except that, as Figure 8 As shown, the connecting shaft in this embodiment is a polygonal column 205.

[0050] The above embodiments are only used to explain the concept of this utility model, and are not intended to limit the protection of this utility model. Any non-substantial modifications made to this utility model using this concept should fall within the protection scope of this utility model.

Claims

1. A polyurethane polishing disc with a variable polishing surface, comprising a base, a connector at the center of the back side of the base, a polyurethane layer on the front side of the base, and a Velcro layer on the side of the polyurethane layer away from the base; characterized in that: It includes an outer ring seat that is detachably connected to the base. The front side of the outer ring seat is provided with a second polyurethane layer. The side of the second polyurethane layer away from the outer ring seat is provided with a second hook and loop fastener layer. The first polyurethane layer and the second polyurethane layer are flush with each other, as are the first hook and loop fastener layer and the second hook and loop fastener layer.

2. The polyurethane polishing disc with a variable polishing surface as described in claim 1, characterized in that: The base has an external thread on its outer circumference, and the outer ring seat has an internal thread on its inner circumference. The base and the outer ring seat are connected by a thread.

3. The polyurethane polishing disc with a variable polishing surface as described in claim 2, characterized in that: The base extends outward to form a limiting ring. The limiting ring and the outer ring seat have corresponding screw holes on their backs. The base and the outer ring seat are also fixed together by screws.

4. The polyurethane polishing disc with a variable polishing surface as described in claim 1, characterized in that: The base, polyurethane layer 1, and Velcro layer 1 are provided with through holes 1. There are multiple through holes 1, which are arranged in a ring around the connector. A communication channel 1 is provided between two adjacent through holes 1.

5. A polyurethane polishing disc with a variable polishing surface as described in claim 1, characterized in that: The outer ring seat, polyurethane layer two, and Velcro layer two are provided with through holes two. There are multiple through holes two, which are arranged in a ring around the connector. A communication channel two is provided between two adjacent through holes two.

6. The polyurethane polishing disc with a variable polishing surface as described in claim 1, characterized in that: The front side of the base and / or the front side of the outer ring seat are provided with reinforcing ribs.

7. A polyurethane polishing disc with a variable polishing surface as described in claim 6, characterized in that: The reinforcing ribs on the base and / or the reinforcing ribs on the outer ring seat are provided with barbs or protrusions.

8. A polyurethane polishing disc with a variable polishing surface as described in claim 1, characterized in that: The connector is detachably and fixedly connected to the back of the base.

9. A polyurethane polishing disc with a variable polishing surface as described in claim 8, characterized in that: The connector, from bottom to top, includes an external threaded seat, a disc with a diameter larger than that of the external threaded seat, and a connecting shaft. The back center of the base has an internal threaded hole that can be connected to the external threaded seat. The upper and lower sides of the disc are integrally formed with the external threaded seat and the connecting shaft, respectively. The disc and the base have corresponding screw holes on their backs, and the disc and the base are fixed together by screws.

10. A polyurethane polishing disc with a variable polishing surface as described in claim 9, characterized in that: The connecting shaft is a cylindrical or polygonal column with an external thread or an internal thread hole.

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