CN217750990U - Extension buffer disc of torque sand dish tray - Google Patents

Abstract

The embodiment of the specification discloses an expansion buffer disc of a torque sand disc tray. The expansion buffer disk comprises a connecting piece; wherein, the middle part is used for connecting the connecting piece and the pasting piece; the connecting piece is used for connecting the torque sand disc tray; the connecting piece comprises a fixing part and a connecting part, and the fixing part is positioned in the middle piece; one part of the connecting part is positioned in the middle part, and the other part of the connecting part extends out of the middle part; the sticking piece is used for sticking sand paper; the adhesive element comprises a first adhesive element connected to the bottom side of the intermediate element and/or a second adhesive element connected to the side of the intermediate element. The extension buffer disc in this description embodiment can be connected with switching sand dish tray, increases the application scope of torque sand dish tray, can satisfy rough machining and thin processing demand simultaneously, has avoided the trouble that the switching in-process tray of rough machining and thin processing was changed, and labour saving and time saving has improved the efficiency that the work piece was polished.

Description

Extension buffer disc of torque sand dish tray

Priority declaration

The application claims priority of Chinese application No. 202110881789.6 filed on 8/2/2021.

Technical Field

This specification relates to the mechanical field of polishing, in particular to extension buffer disc of torque sand dish tray.

Background

A sander (or polisher) generally includes two processes of rough machining and fine machining in a process of sanding a workpiece. The rough machining and the fine machining can be performed by a torque sanding disc and a back-pile sanding paper, respectively. In the rough machining process, the grinding machine mainly performs rough grinding on a workpiece through a torque sand disc, and the torque sand disc is connected with the grinding machine through a torque sand disc tray; in the fine machining process, the sander mainly performs fine grinding (e.g., polishing) on a workpiece through the back fine hair abrasive paper, the torque abrasive disc tray cannot be directly connected with the back fine hair abrasive paper, and the back fine hair abrasive paper needs to be connected with the sander through other trays. Specifically, after rough machining is completed, in order to replace the torque disc with a back fluff abrasive paper for fine machining of a workpiece, the torque disc tray on the sander needs to be replaced with another tray (for example, a 3M 14736U tray manufactured by 3M company, which is provided with a surface fastener capable of being mounted on a 3M7403 pneumatic sander/polisher) to attach the abrasive paper. Because the loading and unloading of the tray on the polisher are troublesome, the process of replacing the tray is time-consuming and labor-consuming, and the polishing efficiency of the workpiece is affected. Therefore, hope to provide a solution, can increase the application scope of torque sand dish tray for torque sand dish tray not only can connect torque sand dish also can connect back of the body fine hair abrasive paper, with satisfy rough machining and fine processing demand simultaneously, let the problem that the in-process needs to be changed the tray on the machine of polishing at the work piece simultaneously can be solved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an extension buffer disc of torque sand dish tray. This extension buffer tray includes: the middle piece, the connecting piece and the pasting piece; wherein, the middle part is used for connecting the connecting piece and the pasting piece; the connecting piece is used for connecting the torque sand disc tray; the connecting piece comprises a fixing part and a connecting part, and the fixing part is positioned in the middle piece; one part of the connecting part is positioned in the middle part, and the other part of the connecting part extends out of the middle part; the sticking piece is used for sticking sand paper; the adhesive member comprises a first adhesive member attached to the bottom surface of the intermediate member and/or a second adhesive member attached to the side surface of the intermediate member.

In some embodiments, the intermediate member connects the connecting member and the adhesive member together by injection molding.

In some embodiments, the material of the intermediate piece is polyurethane.

In some embodiments, the connecting portion of the connector and the fixing portion of the connector are integrally formed.

In some embodiments, the connecting portion of the connector is a threaded button; the fixing portion of the connecting member is disc-shaped.

In some embodiments, the fixing portion is provided with at least one protrusion portion in a circumferential direction.

In some embodiments, at least one recess is provided on at least one surface of the fixation portion.

In some embodiments, the adhesive member is a hook and loop fastener.

Drawings

The present application will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not intended to be limiting, and in these embodiments like numerals are used to indicate like structures, wherein:

FIG. 1 is a schematic illustration of a torque sand disc configuration according to some embodiments herein;

FIG. 2 is a schematic illustration of a torque sand tray configuration according to some embodiments herein;

FIG. 3 is a schematic diagram of a structure of a tray for sandpaper with back sandpaper according to some embodiments of the present disclosure;

FIG. 4 is a schematic diagram of an extended buffer tray, according to some embodiments herein;

FIG. 5 is a cross-sectional view of an extended buffer tray shown in accordance with some embodiments of the present description;

FIG. 6 is a schematic structural view of a connector according to some embodiments of the present description;

FIG. 7 is a schematic illustration of a connector according to some embodiments of the present disclosure;

fig. 8 is a cross-sectional view of a connector according to some embodiments of the present disclosure.

Reference numerals: 100 is a torque sand disc; 101 is cloth-based sand paper; 102 is a screw button; 200 is a torque sand tray; 201 is a threaded hole; 202 is a mounting shaft; 300 is a back fluff sand paper tray; 400 is an extended buffer tray; 410 is middleware; 420 is a connecting piece; 421 is a fixed part; 422 is a connecting part; 423 is a convex part; 424 is a recess; 430 is an adhesive member; 431 is a first pasting piece; and 432 is a second adhesive member.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

In the grinding of a workpiece using a grinding machine, rough machining and fine machining may be generally included. Wherein, the rough machining (for example, surface grinding of metal, wood and the like, metal derusting, crater removal and the like) adopts abrasive paper obtained by coating abrasive with larger granularity (for example, the granularity is between 24 meshes and 320 meshes) on a substrate and a grinding machine to grind the surface of a workpiece, and the abrasive with larger granularity can quickly grind the rough surface of the workpiece into a smoother surface, so that the grinding efficiency is improved; and fine processing (e.g., metal polishing, paint removal, deburring, etc.) employs a sand paper obtained by coating an abrasive having a small particle size (e.g., having a particle size of 320-800 mesh or more than 800 mesh) on a substrate and then connecting the sand paper to a grinding machine to further grind the relatively smooth surface obtained after the rough processing, thereby improving the smoothness or grinding accuracy of the surface of the workpiece.

Further, since the rough surface is rough and the abrasive has a large particle size, the rough surface may be sanded with cloth-based sandpaper (i.e., sandpaper in which an abrasive having a large particle size is coated on a cloth base). The cloth-based abrasive paper has good strength, and is difficult to wear or break due to rough surface or large abrasive granularity of a workpiece. Wherein, the granularity of the cloth-based sand paper is between 24 meshes and 320 meshes. And because the abrasive material granularity that the fine processing adopted is less, and the precision requirement to polishing is higher, the fine processing can use paper base abrasive paper (the abrasive material that the less abrasive material of granularity scribbles the abrasive paper that forms that attaches on the paper base) to polish to the work piece surface, and the paper base has better flexibility, adhesion and roughness for guaranteeing the cloth base, can guarantee that the less abrasive material of granularity adheres on the paper base better and the mill flour that forms (the one side that the work piece was polished to abrasive paper) also is comparatively level and smooth to improve the precision of polishing. Wherein, in order to satisfy different fine processing requirements, the granularity of the paper base abrasive paper that chooses also can be different. For example, when the surface of the workpiece is subjected to paint removal and polishing, paper-based sand paper with the granularity of 320-800 meshes can be selected. For another example, when the surface of the workpiece needs to be finely polished, paper-based sandpaper with a particle size of more than 800 meshes can be selected.

According to the method, the types of the abrasive paper adopted by rough machining and fine machining in the workpiece grinding process are different, wherein the rough machining adopts cloth-based abrasive paper, and the fine machining adopts paper-based abrasive paper (or called back fluff abrasive paper). In the actual operation process, because the types of the abrasive paper used for rough machining and fine machining are different, after the rough machining is completed, the cloth-based abrasive paper on the grinding machine is generally required to be replaced by paper-based abrasive paper for fine machining.

Further, it is necessary to perform rough machining on the workpiece using cloth-based sandpaper. Specifically, roughing may use the torque sanding disc 100 shown in fig. 1 to sand a workpiece. As shown in fig. 1, torque sander 100 may include a cloth-based sandpaper 101 and a threaded button 102.

During the roughing, the torque disc 100 can be connected to a sander by means of a torque disc tray 200 as shown in fig. 2. Specifically, as shown in fig. 2, a threaded hole 201 is formed in the torque sand tray 200, the threaded hole 201 can be in threaded connection with the threaded button 102 on the torque sand tray 100, so as to connect the torque sand tray 100 to the torque sand tray 200, and the torque sand tray 200 is provided with an installation shaft 202, when the torque sand tray 200 is installed on the sander through the installation shaft 202, the installation shaft 202 can be used for transmitting the torque generated by the sander, so that the torque sand tray 200 rotates, and the torque sand tray 100 polishes the workpiece.

After the workpiece is roughly processed, the workpiece needs to be finely processed by using paper-based abrasive paper. Because the granularity of the abrasive material adopted by the fine processing is finer, the paper-based abrasive paper is adopted for the fine processing to polish the workpiece. Since paper-based abrasive paper has better flexibility and is easily damaged than cloth-based abrasive paper, the paper-based abrasive paper cannot be directly attached to the torque disc tray 200 as with the torque disc 100, but needs to be attached to another tray (e.g., a sandpaper tray 300 of fig. 3), and the attachment of the abrasive paper to the sander is achieved by mounting the tray to the sander. Thus, after the workpiece has been rough machined, the torque disc tray on the sander needs to be removed and another tray (e.g., the sandpaper-backed tray 300) is attached to the sander for fine machining of the workpiece, wherein the paper-based sandpaper can be adhered to the tray before or after the tray is attached to the sander.

It follows that trays mounted on sanding machines are generally limited in their applicability to be used in conjunction with sandpaper of a larger grit range to meet more sanding demands, for example, to meet both rough and fine machining demands. This causes trouble in mounting and dismounting the torque disc tray or other trays (e.g., the sandpaper tray 300) to and from the sander (particularly, a pneumatic sander), and the process of replacing the tray is time-consuming and labor-consuming when the rough machining is completed and the fine machining is performed, thereby reducing the efficiency of the overall polishing process of the sander on the workpiece. To this end, if the application field of the torque disc tray 200 can be increased, the torque disc tray 200 can be connected to not only torque discs within the range of 24-240 mesh granularity, but also back fine sand paper with granularity larger than 240 mesh (e.g., 240-10000 mesh), so that the torque disc tray 200 can form a polishing set combination with multiple granularity with the sand paper (including the torque disc and the back fine sand paper) within a larger granularity range (e.g., 24-10000 mesh), and when the torque disc tray 200 is installed on a polisher, the requirements of rough machining and fine machining can be met at the same time, and the tray can be prevented from being replaced in the switching process of rough machining and fine machining.

Therefore, an object of the present specification is to solve the problem of how to improve the applicable field of the torque sand tray 200, so that the torque sand tray 200 can be combined with sand paper in a larger grain size range to form a multi-grain size grinding set, so that when the torque sand tray 200 is installed on a grinding machine, the requirements of rough machining and fine machining can be met at the same time, and the tray replacement during the switching process of rough machining and fine machining is avoided.

In order to solve the technical problem, an embodiment of the present specification provides an extension buffer disc of a torque sand tray, where the extension buffer disc may include an intermediate part, a connecting part, and an adhesive part, where the intermediate part is used to connect the connecting part and the adhesive part, the connecting part may be connected to the torque sand tray, and the adhesive part may be connected to sand paper. After work piece rough machining accomplished, need carry out the thin processing, only need dismantle the torque sand tray from torque sand tray and get off, install the extension buffer disk on torque sand tray again, be connected abrasive paper (for example, back of the body fine hair abrasive paper) and extension buffer disk again, alright carry out the thin processing to the work piece. Can increase the application scope of torque abrasive disc tray like this, make torque abrasive disc tray can form the suit combination of polishing of many granularity sizes with the abrasive paper in the great granularity scope to when making polisher installation torque abrasive disc tray, can satisfy rough machining and fine processing demand simultaneously. In the whole in-process of polishing of work piece, torque sand dish tray can be installed all the time on the polisher, need not to change for other trays, be connected to torque sand dish tray through the extension buffering dish with this description embodiment on, just can connect the great back of the body fine hair abrasive paper of granularity, in order to realize carrying out the fine processing to the work piece, and because torque sand dish and extension buffering dish all adopt threaded connection's mode and torque sand dish tray to be connected, make the process of changing the torque sand dish on the torque sand dish tray into the extension buffering dish in this description embodiment comparatively simple, time saving and labor saving. In some embodiments, the sandpaper may also be attached to the extension buffer tray after the extension buffer tray is attached to the torque disc tray.

It should be noted that the sandpaper in the examples of the present specification is generally referred to as paper-based sandpaper (or sandpaper with a pile) without specific description. In some embodiments, the coated abrasive of embodiments of the present disclosure may be other coated abrasives or discs that are not directly attachable to the torque disc tray. In addition, the sander in the embodiments of the present specification may be classified into a pneumatic sander and an electric sander according to the power classification, and may also be classified into a seat sander and a portable sander according to the machine scale classification. In some embodiments, the polishing machine in the embodiments of the present description may be replaced by a grinder, a polishing machine, even a drilling machine, or the like. The expanded buffer tray in the embodiment of the present specification will be described in detail with reference to fig. 4 and 5.

FIG. 4 is a schematic diagram of an extended buffer tray, according to some embodiments of the present description. FIG. 5 is a cross-sectional view of an extended buffer tray shown in accordance with some embodiments of the present description.

As shown in fig. 4 and 5, the extension buffer tray 400 may include an intermediate member 410, a connection member 420, and an adhesive member 430.

In some embodiments, an intermediate member 410 may be used to connect the connecting member 420 and the adhesive member 430, thereby forming the extended buffer tray 400; the connector 420 is used for connecting with the torque sand tray 200; the connecting member 420 includes a fixing portion and a connecting portion, the fixing portion being located in the middle member 410; a part of the connection part is positioned in the middle piece 410, and the rest part of the connection part extends out of the middle piece 410; one side of the adhesive member 430 is used for attaching sandpaper and the other side of the adhesive member 430 is coupled to the intermediate member 410. In some embodiments, the adhesive member 430 may include a first adhesive member 431 attached to a bottom surface of the intermediate member 410 and/or a second adhesive member 432 attached to a side surface of the intermediate member 430.

In some embodiments, the intermediate piece 410 may be a disc-shaped structure, the diameter of which may be designed according to the size of the sandpaper or torque disc tray. For example, the diameter of the intermediate piece 410 may be 50mm or 75mm, etc. In some embodiments, the thickness of the intermediate piece may be 10mm. The above description is only an example and not a limitation, and in other cases, the shape and size of the middle piece 410 may be designed according to actual needs, for example, the shape of the middle piece 410 may also be square, triangle, etc.

In some embodiments, the middle part 410 may be provided with dust suction holes at the periphery. For example, the middle member 410 may be provided with 8 suction holes at the periphery thereof. The generated dust can be absorbed during the fine grinding or polishing of the workpiece by the grinding machine or the polishing machine.

In some embodiments, the connector 420 may be used to connect with a torque disc tray 200. The coupling 420 will be described in detail below with reference to fig. 6-8. Fig. 6 and 7 are schematic structural views of a connector according to some embodiments of the present disclosure. Fig. 8 is a cross-sectional view of a connector according to some embodiments of the present disclosure.

As shown in fig. 6, 7 and 8, the connection member 420 may include a fixing portion 421 and a connection portion 422, wherein portions of the fixing portion 421 and the connection portion 422 may be located in the middle member 410, and another portion of the connection portion 422 may protrude from one side of the middle member 410 for connecting with the torque disc tray.

In some embodiments, to facilitate the connection between the connection member 420 and the torque sand tray 200, the connection portion 422 of the connection member 420 (or the portion of the connection portion 422 located outside the middle member 410) may be designed as a screw button, wherein the screw button may have the same shape and size as the screw button 102 on the torque sand tray 100 that the torque sand tray 200 is adapted to, so as to ensure that the torque sand tray 200 can be connected to both the torque sand tray 100 and the expansion buffer disc 400. And the design of the screw button can make the operator only need through the mode that the screw thread was screwed up and was unscrewed, can change the torque sand dish 100 on the torque sand dish tray 200 for extension buffer disc 400 easily to carry out the microfabrication.

In some embodiments, the fixing portion 421 of the connection member 420 may be a disc-shaped structure. In some embodiments, the fixing portion 421 may be a regular or irregular structure such as a rectangle, a triangle, etc.

In some embodiments, the adhesive member 430 may be used to adhere sandpaper. Wherein sandpaper may be adhered to one side of the adhesive member 430 and the other side of the adhesive member 430 may be attached to the intermediate member 410. In some embodiments, the adhesive member 430 may include a first adhesive member 431 and/or a second adhesive member 432. Wherein one surface of the first sticker 431 is connected to sandpaper, and the other surface is connected to the bottom surface of the middle piece 410; second adhesive element 432 is attached to sandpaper on one side and to the side of intermediate member 410 on the other side. By connecting the first adhesive member 431 to the bottom surface of the middle member 410 to connect sandpaper, the extended buffer disc 400 can meet normal polishing requirements (e.g., surface polishing, etc.), and by connecting the second adhesive member to the side surface of the middle member 410 to connect sandpaper, the extended buffer disc 400 can be side-polished, i.e., by polishing the side surface of the extended buffer disc 400, thereby meeting more specific polishing requirements (e.g., polishing of edges, holes, or grooves, etc.), so that the extended buffer disc 400 can be applied to more polishing scenes.

In some embodiments, to facilitate the adhesion of sandpaper to adhesive 430, adhesive 430 (e.g., first adhesive 431 and/or second adhesive 432) may be a hook and loop fastener that adhesively mates with sandpaper. For example, when the sandpaper is a back-pile sandpaper, the adhesive member 430 may be a back-pile hook and loop fastener. In some embodiments, the first adhesive member 431 and the second adhesive member 432 can be separate adhesive members. In some embodiments, the first adhesive member 431 and the second adhesive member 432 can be integrally formed (e.g., integrally formed) to facilitate manufacturing and expansion of the buffer tray 400, while improving the stability of the connection between the first adhesive member 431 and the second adhesive member 432 with the intermediate member 410.

In some embodiments, when the coated abrasive is a self-adhesive coated abrasive, one side of the self-adhesive coated abrasive is provided with a double-sided adhesive tape, which can be directly adhered to one side of the adhesive member 430 or the intermediate member 410.

When the sander polishes a workpiece, the high-speed rotation of the extension buffer tray 400 may cause problems in that the connection part 422 of the connection member 420 is separated from the fixing part 421, the connection member 420 is separated from the intermediate member 410, and the intermediate member 410 is separated from the attachment member 430. Therefore, another object of the present specification is how to improve the structural strength of the entire extension buffer tray 400.

In some embodiments, the intermediate member 410 couples the attachment member 420 and the adhesive member 430 together by injection molding. By way of example only, the adhesive member 430 may be first placed on the bottom of a mold used to mold the intermediate member 410, wherein the first adhesive member 431 is positioned on the bottom of the mold, the second adhesive member 432 is placed on the first adhesive member 431, and the outer surface of the second adhesive member 432 is attached to the inner wall of the mold, and the connecting member 420 is suspended in the mold while maintaining a portion of the connecting member 420 in the mold and another portion outside the mold. During the injection molding of the intermediate member 410, an injection molding material is injected into the mold, cured and molded on the first adhesive member 431 and in the second adhesive member 432, and covers a portion of the connecting member 420 in the mold. When the injection molding is completed, the mold releasing operation is performed, and the extended buffer tray 400 can be obtained. By injection molding of the intermediate member 410, a portion of the connection member 420 is embedded in the intermediate member 410, and the adhesive member 430 (the first adhesive member 431 and/or the second adhesive member 432) is securely adhered to the intermediate member 410, so that the respective members are not easily separated from each other, thereby improving the overall structural strength of the extension buffer tray 400.

In some embodiments, to further improve the structural strength of the extension buffer tray 400, the middle part 410 is made of Polyurethane (PU), i.e., the middle part 410 may be a polyurethane elastomer. The middle member 410 made of polyurethane improves the overall structural strength of the extension buffer tray 400, so that it can endure high-speed rotation and more complicated working environment, and extends the lifespan of the extension buffer tray 400. In addition, the middle part 410 made of polyurethane has better elasticity, when the polishing surface of the workpiece is non-planar (for example, cambered surface), the middle part 410 can be elastically deformed by applying extrusion force to the middle part 410 in the polishing process, so that the shapes of the adhesive part 430 and the abrasive paper on the adhesive part 430 are changed accordingly, the polishing surface of the abrasive paper can be completely attached to the polishing surface (for example, cambered surface) of the workpiece, and the polishing surface of the workpiece can be fully polished. And when extension buffering dish 400 or polisher produce bad vibration at the in-process of polishing, also need not to set up the foam-rubber cushion and absorb bad vibration on extension buffering dish 400 like back of the body fine hair abrasive paper tray, only by the good elasticity that middleware 410 made by polyurethane had, also can absorb the bad vibration that the in-process of polishing produced betterly for polish can not receive the influence of bad vibration, more steady, improved the precision of polishing.

In some embodiments, the connection portion 422 and the fixing portion 421 of the connection member 420 are integrally formed. For example, the connection member 420 may be manufactured by injection molding or the like. In some embodiments, the connector 420 is made of a metallic or non-metallic material. For example, the connection member 420 may be made of nylon, aluminum alloy, or the like. The connection part 422 of the connection member 420 is integrally formed with the fixing part 421, so that the connection part 422 is not easily separated from the fixing part 421, thereby improving the overall structural strength of the extension buffer tray 400.

As shown in fig. 6 and 7, in some embodiments, a protrusion 423 is disposed on the circumferential direction of the fixing portion 421, and the protrusion 423 may limit a relative rotation between the connection member 420 and the middle member 410, so as to effectively prevent the connection member 420 from being separated from the middle member 410 during the high-speed rotation of the extension buffer tray 400, thereby improving the overall structural strength of the extension buffer tray 400. In some embodiments, the projections 423 may be regularly or irregularly shaped, such as rectangular, triangular, etc. In some embodiments, the number of the convex portions 423 may be set between 4 and 20. By setting the number of the convex parts 423 between 4 and 20, the situation that the connecting part 420 and the middle part 410 rotate relatively to each other to separate in the high-speed rotation process of the expansion buffer disc 400 can be avoided, and the situation that the connecting part 420 and even the whole expansion buffer disc 400 are reduced in structural strength and damaged in service life due to the fact that the size of the convex parts 423 is designed to be smaller when the number of the convex parts 423 is too large (for example, exceeds 20), and the strength of the convex parts 423 with smaller size is not enough to adapt to the high-speed rotation of the expansion buffer disc 400 due to the size setting of the fixing part 421, plastic deformation occurs, and even fracture occurs. In some embodiments, a plurality of bellying 423 are evenly distributed in the circumference of fixed part 421, and the interval between two adjacent bellying 423 is the same promptly, can guarantee like this that fixed part 421 and connecting piece 410 have better structural strength to improve the holistic structural strength of extension buffer disk 400, also can guarantee extension buffer disk 400 when rotating, and fixed part 421 atress is balanced, guarantees that extension buffer disk 400 rotates steadily, promotes the quality of polishing.

As shown in fig. 7, in some embodiments, at least one surface of the fixing portion 421 of the connection member 420 is provided to the recess 424. For example, the recess 424 may be provided on the upper surface and/or the lower surface of the fixing portion 421. When the middle member 410 is injection molded, the injection molding material may enter the recess 424 to be cured, so that the contact area between the middle member 410 and the fixing portion 421 is increased, thereby improving the overall structural strength of the extended buffer tray 400.

In some embodiments, the recess 424 may have a regular or irregular shape, such as a rectangle, an oval, a circle, etc., when viewed from the bottom of the connector 420. In some embodiments, the recesses 424 may have any suitable size, shape, and distribution over the surface of the fixation portion 421. In some embodiments, the aperture of the recess 424 may be between 0.01mm and 10mm. When the caliber of the recess 424 is too small (e.g., less than 0.01 mm) or too large (greater than 10 mm), the increase in the contact area of the intermediate member 410 and the fixing portion 421 is not significant, and the structural strength of the entire extended cushion pan 400 cannot be effectively improved. The aperture of the recess 424 may refer to the maximum size of the opening of the recess 424. In some embodiments, the depth of the recess 424 may be between 0.01mm and 10mm. By setting the depth of the recess 424 to be between 0.01mm and 10mm, a large contact area between the interior of the recess 424 and the intermediate member can be ensured, and the structural strength of the entire extension buffer tray 400 is not affected because the interior space of the recess 424 cannot be completely filled with the injection molding material when the intermediate member 410 is injection molded because the depth of the recess 424 is too deep (e.g., exceeds 10 mm). Wherein, the depth of the recess 424 may be the largest dimension of the recess 424 in the thickness direction of the fixing portion 421. In some embodiments, the number of the concave portions 424 on one surface of the fixing portion 421 may be set according to one or more of the size of the fixing portion 421 (e.g., the area of the fixing portion 421), the size of the concave portions 424 (e.g., the concave portions 424), the arrangement and distribution manner of the concave portions 424 on the fixing portion 421, and the distribution density of the concave portions 424. In some embodiments, the number of recesses 424 may be between 40 and 90. Thus, it is ensured that the contact area between the intermediate member 410 and the fixing portion 421 can be sufficiently increased to improve the connection strength between the intermediate member 410 and the connection member 420, and further improve the overall structural strength of the extended buffer disk 400, and it is also possible to prevent the reduction of the structural strength of the fixing portion 421 caused by the excessive number (for example, more than 90) of the recessed portions 424 on the fixing portion 421, and thus the reduction of the overall structural strength of the extended buffer disk 400. In some embodiments, the plurality of recesses 424 may be uniformly distributed in a matrix or uniformly distributed in a ring shape on the fixing portion 421. Preferably, a plurality of depressed parts 424 can be annular evenly distributed at fixed part 421, can guarantee like this that the mass distribution of fixed part 421 is even, prevent to take place the vibration because of the mass distribution of fixed part 421 is inhomogeneous and when rotatory, this vibration not only can lead to extension buffering dish 400 to rotate unstably, also can influence the precision of polishing of work piece, can produce the noise moreover to can cause harmful effects to the mill, make its main shaft life-span reduce, even cause mechanical accident etc..

The beneficial effects that may be brought by the embodiments of the present description include, but are not limited to: (1) The extension buffer disc in the embodiment of the specification can be connected to the torque sand disc tray, so that the application field of the torque sand disc tray is increased, the torque sand disc tray can be combined with sand paper in a larger granularity range to form a grinding set with multiple granularity sizes, the requirements of rough machining and fine machining can be met simultaneously when the torque sand disc tray is installed on a grinding machine, the trouble caused by replacing the tray in the switching process of rough machining and fine machining is avoided, time and labor are saved, and the grinding efficiency of workpieces is improved; (2) Through the cooperation that the surface that sets up bellying and fixed part in the week of middleware injection moulding, connecting piece integrated into one piece, fixed part set up the depressed part, improved the structural strength of extension buffer disk on the whole, prolonged the life of extension buffer disk under high-speed rotation. (3) The middleware in the embodiment of the specification is made of polyurethane, so that the expansion buffer disc can be ensured to adapt to a non-planar polishing surface of a workpiece, the abrasive paper can be completely attached to the polishing surface of the workpiece, the workpiece can be fully polished, the middleware has good elasticity and can absorb bad vibration generated in the polishing process, a sponge pad does not need to be additionally arranged when the expansion buffer disc is connected with back fluff abrasive paper, and the polishing can be stably carried out; (4) Paste the piece in order to paste abrasive paper through connecting the second in the middleware side for the side is polished to the extension buffering dish, makes the extension buffering dish can be suitable for more scenes of polishing.

It is to be noted that different embodiments may produce different advantages, and in different embodiments, the advantages that may be produced may be any one or combination of the above, or any other advantages that may be obtained.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be considered merely illustrative and not restrictive of the broad application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, the present application uses specific words to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, certain features, structures, or characteristics may be combined as suitable in one or more embodiments of the application.

Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present application. Other variations are also possible within the scope of the present application. Thus, by way of example, and not limitation, alternative configurations of the embodiments of the present application can be viewed as being consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to only those explicitly described and illustrated herein.

Claims (8)

1. An extension buffer disk of a torque disc tray, the extension buffer disk comprising: the middle piece, the connecting piece and the pasting piece;

the middle piece is used for connecting the connecting piece and the pasting piece;

the connecting piece is used for being connected with the torque sand disc tray; the connecting piece comprises a fixing part and a connecting part, and the fixing part is positioned in the intermediate piece; a part of the connecting part is positioned in the middle piece, and the rest part of the connecting part extends out of the middle piece;

the sticking piece is used for sticking sand paper; the adhesive member comprises a first adhesive member connected to the bottom surface of the intermediate member and/or a second adhesive member connected to the side surface of the intermediate member.

2. The extension bumper tray of claim 1, wherein the intermediate member connects the connecting member and the adhesive member together by injection molding.

3. The extended cushion pan of claim 2, wherein the material of the intermediate member is polyurethane.

4. The extended cushion pan of claim 1, wherein the connecting portion of the connector and the fixing portion of the connector are integrally formed.

5. The extended cushion pan of claim 1, wherein the connection portion of the connector is a threaded button; the fixing portion of the connecting member is disc-shaped.

6. The extended cushion pan of claim 5, wherein the fixing portion is provided with a projection in a circumferential direction.

7. The extension bumper tray of claim 5 or 6, wherein the fixing portion is provided with a depression on at least one surface thereof.

8. The extension bumper tray of claim 1 or 2, wherein the adhesive member is a hook and loop fastener.

Images