Polyurethane polishing disk for pneumatic polishing machine

Abstract

The utility model relates to the field of pneumatic tools and accessories, in particular to a polyurethane polishing disk for a pneumatic polishing machine, which comprises a base, a connecting piece is arranged at the center of the back of the base, a polyurethane layer is arranged on the front of the base, a magic tape layer is arranged on one side of the polyurethane layer far away from the base, and first through holes are arranged on the base, the polyurethane layer and the magic tape layer. A plurality of first through holes are arranged and are annularly arranged by taking the connecting piece as the center; a first contact channel is arranged between every two adjacent first through holes. Compared with the first through holes arranged in a single ring, the heat dissipation device has the advantages that the first connecting channels are arranged between every two adjacent first through holes, the through holes are connected in series through the connecting channels, heat, which cannot be discharged in time, of the through holes in a local area can be discharged to other through holes through the connecting channels, and the heat dissipation effect is further improved.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic tools and accessories, and in particular to a polyurethane polishing disc for a pneumatic polishing machine. 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. 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.

[0005] 2. 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 it and the polyurethane layer needs to be improved.

[0006] 3. Different brands of pneumatic polishing machines may have different connection structures between their rotating ends and polyurethane polishing discs. Currently, the connectors on the base are anchored to the base as a single unit and cannot be replaced. Some repair shops may have pneumatic polishing machines of multiple brands. When stocking up, shop owners will also need to purchase multiple models of polyurethane polishing discs, which will cause inconvenience for later use and management.

[0007] Therefore, this case is brought. Utility Model Content

[0008] The purpose of this invention is to provide a polyurethane polishing disc for a pneumatic polishing machine to solve the above-mentioned defects.

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

[0010] A polyurethane polishing disc for a pneumatic polishing machine includes 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. The base, the polyurethane layer, and the Velcro layer are provided with a through hole, and there are multiple through holes arranged in a ring around the connector. A communication channel is provided between two adjacent through holes.

[0011] Furthermore, the base, polyurethane layer, and Velcro layer are provided with through holes two. There are multiple through holes two, which are arranged in a ring around the connector. The through holes two are located outside the through holes one.

[0012] Furthermore, a second connecting channel is provided between the second through hole and the first through hole or the first connecting channel.

[0013] Furthermore, the front side of the base is provided with reinforcing ribs.

[0014] Furthermore, the reinforcing ribs are provided with barbs or protrusions on their sides or the front of the base.

[0015] Furthermore, the connector is detachably fixed to the back of the base.

[0016] 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.

[0017] Furthermore, the connecting shaft is an externally threaded column or a cylindrical or polygonal column with an internally threaded hole.

[0018] The advantages of this utility model are:

[0019] 1. Relative to Figure 1 The application provides through holes 1 and 2 arranged in inner and outer rings, which improves the heat dissipation capacity of each area on the polyurethane polishing pad. At the same time, a connecting channel 1 is set between two adjacent through holes 1, and a connecting channel 2 is set between through hole 2 and through hole 1 or connecting channel 1. The connecting channels connect all the through holes together, so that the heat that cannot be discharged in time in a local area through the through holes can be discharged to other through holes through the connecting channels, further improving the heat dissipation effect.

[0020] 2. 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.

[0021] 3. The base and connectors are detachably connected, and the product comes with various types of connecting shafts in the factory packaging, allowing users to change them according to their needs. Although this slightly increases the selling price (the cost of one 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

[0022] Figure 1 This is a schematic diagram of the structure of a polyurethane polishing disc in the background art;

[0023] Figure 2 for Figure 1 An explosion diagram;

[0024] Figure 3 This is a schematic diagram of the structure of the polyurethane polishing disc in Example 1;

[0025] Figure 4 for Figure 3 An explosion diagram;

[0026] Figure 5 This is a schematic diagram showing the arrangement of through hole one, through hole two, communication channel one, and communication channel two on the back of the base in Example 1;

[0027] Figure 6 This is a schematic diagram showing the arrangement of the reinforcing ribs on the front of the base in Example 1;

[0028] Figure 7 This is an exploded view of the connector with external threaded column and the base in Example 2;

[0029] Figure 8 This is a schematic diagram of the assembly of the connecting piece with the internally threaded hole and the base in Example 3;

[0030] Figure 9 This is a schematic diagram of the assembly of the connector with polygonal columns and the base in Example 4.

[0031] Label Explanation

[0032] 1. Base; 101. Through hole one; 102. Through hole two; 103. Connecting channel one; 104. Connecting channel two; 105. Internal threaded hole; 2. Polyurethane layer; 3. Velcro layer; 4. Connector; 401. External threaded seat; 402. Disc; 403. Screw; 404. External threaded post; 405. Internal threaded cylinder; 406. Polygonal post; 5. Reinforcing rib; 501. Barb or protrusion. Detailed Implementation

[0033] 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.

[0034] Example 1

[0035] This embodiment proposes a polyurethane polishing disc for a pneumatic polishing machine, such as... Figure 3 and Figure 4 As shown, the device includes a base 1, a connector 4 at the center of the back side of the base 1, a polyurethane layer 2 on the front side of the base 1, and a hook-and-loop layer 3 on the side of the polyurethane layer 2 away from the base 1. Multiple through holes 101 are provided on the base 1, polyurethane layer 2, and hook-and-loop layer 3, arranged in a ring around the connector 4. As an improvement, this embodiment provides multiple through holes 102 on the base 1, polyurethane layer 2, and hook-and-loop layer 3, arranged in a ring around the connector 4, with the second through hole 102 located outside the first through hole 101. Compared to... Figure 1 and Figure 2 In contrast to existing products, this application incorporates multiple through holes (102) to improve heat dissipation in various areas of the polyurethane polishing disc. Furthermore, as... Figure 5 As shown, a connecting channel 103 is provided between two adjacent through holes 101, and a connecting channel 104 is provided between through hole 102 and through hole 101 or connecting channel 103. The connecting channels 103 and 104 connect each through hole 101 and 102 in series, 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 connecting channels, which greatly improves the heat dissipation effect.

[0036] refer to Figure 6 Four reinforcing ribs 5 are provided on the front of the disc-shaped base 1. The reinforcing ribs 5 are used to improve the rigidity of the base 1 and reduce deformation. At the same time, the reinforcing ribs 5 are provided with protrusions 501 on the side (or they can be provided on the front of the base). After polyurethane foam is injected, the connection surface between the polyurethane and the base 1 (reinforcing ribs 5) can be increased, thereby improving the bonding strength.

[0037] Example 2

[0038] like Figure 3As shown in Embodiment 1, the connector 4 and the center of the back of the base 1 are non-removable fixed structures (fixed by rivets or formed as one piece with the connector 4 during injection molding). In order to facilitate the replacement of the connector 4, in this embodiment, the connector 4 and the back of the base 1 are detachably fixedly connected.

[0039] Detachable fixed connection structure such as Figure 7 As shown. The connector 4, from bottom to top, includes an external thread seat 401, a disc 402 with a diameter larger than the external thread seat 401, and a connecting shaft. The base 1 has an internal thread hole 105 at the center of its back side that can be connected to the external thread seat 401. The upper and lower sides of the disc 402 are integrally formed with the external thread seat 401 and the connecting shaft, respectively. The disc 402 and the base 1 have corresponding screw holes on their back sides. The disc 402 and the base 1 are connected and fixed by screws 403.

[0040] During installation, the connector 4 is screwed onto the base 1 through the engagement of the external threaded seat 401 and the internal threaded hole 105 of the base 1. After tightening, the disc 402 is exactly against the back of the base 1. At this time, the screw hole on the disc 402 is aligned with the screw hole on the base 1. By screwing in the screw 403, the connector 4 cannot be unscrewed. The pneumatic polisher is fixed to the polyurethane polishing disc through the connecting shaft.

[0041] In this embodiment, the connecting shaft adopts the form of an external threaded post 404.

[0042] Example 3

[0043] This embodiment is largely the same as Embodiment 2, except that, as Figure 8 As shown, the connecting shaft in this embodiment is a cylinder 405 with an internal threaded hole.

[0044] Example 4

[0045] This embodiment is largely the same as Embodiment 2, except that, as Figure 9 As shown, the connecting shaft in this embodiment adopts a polygonal column 406.

[0046] 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 for a pneumatic polisher, comprising a base, a connecting piece arranged at the center of the back of the base, a polyurethane layer arranged on the front of the base, a magic tape layer arranged on the side of the polyurethane layer away from the base, and through holes one arranged on the base, the polyurethane layer and the magic tape layer, wherein the through holes one are arranged in a ring shape with the connecting piece as the center and there are multiple through holes one. characterized in that A communication passage one is arranged between two adjacent through holes one.

2. A polyurethane polishing disc for use in an air powered polisher as defined in claim 1, wherein, Through holes two are arranged on the base, the polyurethane layer and the magic tape layer, wherein the through holes two are arranged in a ring shape with the connecting piece as the center and there are multiple through holes two, and the through holes two are arranged outside the through holes one.

3. A polyurethane polishing disc for use in an air powered polisher as defined in claim 2, wherein, A communication passage two is arranged between the through holes two and the through holes one or the communication passage one.

4. A polyurethane polishing disc for use in an air powered polisher as defined in claim 1, wherein, A reinforcing rib is arranged on the front of the base.

5. A polyurethane polishing disc for use in an air powered polisher as defined in claim 4, wherein, A reverse hook or a protrusion is arranged on the side of the reinforcing rib or the front of the base.

6. A polyurethane polishing disc for use in an air powered polisher as defined in claim 1, wherein, The connecting piece is detachably connected with the back of the base.

7. A polyurethane polishing disc for use in an air powered polisher as defined in claim 6, wherein, The connecting piece comprises, from bottom to top, an outer threaded seat, a circular cake with a larger diameter than the outer threaded seat, and a connecting shaft, an inner threaded hole is arranged at the center of the back of the base and can be connected with the outer threaded seat, the upper and lower sides of the circular cake are integrally formed with the outer threaded seat and the connecting shaft respectively, the circular cake and the back of the base are provided with corresponding screw holes, and the circular cake and the base are fixed by screw connection.

8. A polyurethane polishing disc for use in an air powered polisher as defined in claim 7, wherein, The connecting shaft is an outer threaded column, an inner threaded hole column or a polygonal column.

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