This application claims the benefit of Taiwan Patent Application No. 104218889, filed Nov. 25, 2015, which is hereby incorporated by reference in its entirety.

BACKGROUND OF THE INVENTION

The present invention relates to a connecting member for an abrasive member and, more particularly, to a connecting member for connection with an abrasive member to provide convenient use.

There are various abrasive members for grinding surfaces of different materials. For example, sanding wheels, sandpaper wheels, non-woven abrasive wheels, rubber abrasive wheels, brush wheels with metal filaments, and disc sanders can be used for grinding, decontamination, derusting, and polishing. FIG. 3 shows a conventional sandpaper wheel to be coupled to a shaft 2â€² of a polishing tool or a grinding tool. The abrasive member 1â€² includes an axial hole 11â€² through which the shaft 2â€² of the polishing tool or the grinding tool extends. Then, a threaded block 3â€² having an inner thread is threadedly engaged with a threaded portion 2â€² of the shaft 2â€², thereby fixing the abrasive member 1â€² to the shaft 2â€², as shown in FIG. 4. Thus, the abrasive member 2â€² can rotate together with the shaft 2â€² to polish a workpiece.

However, the abrasive member 1â€² having an axial hole 11â€² cannot couple with an electric or pneumatic grinding tool having a three jaw chuck but no shafts. Thus, a connecting member for securely coupling with an abrasive member 1â€² having an axial hole 11â€² for the purpose of coupling with an electric or pneumatic grinding tool having a three jaw chuck will be a useful invention.

BRIEF SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a connecting member for an abrasive member that can securely connected to an abrasive member having an axial hole, thereby coupling with an electric or pneumatic grinding tool having a three jaw chuck. The present invention can effectively solve the disadvantages of the conventional abrasive members and is every ideal.

To achieve the above objective, a connecting member for an abrasive member according to the present invention includes a body and a fixing member. The body includes a connecting portion, a cylindrical portion connected to an end of the connecting portion and having a compartment, and an opening intercommunicated with the compartment. The compartment includes an inner periphery having an inner threaded portion. The fixing member includes a stopper portion and an outer threaded portion integrally connected to the stopper portion and threadedly engaged with the inner threaded portion.

The outer threaded portion of the fixing member extends through an axial hole of an abrasive member. Then, the outer threaded portion of the fixing member is threadedly engaged with the inner threaded portion of the body, such that a bottom face of the cylindrical portion of the body and the top face of the stopper portion of the fixing member together clamp an upper face and a lower face of the abrasive member, thereby securely fixing the abrasive member and the body together, which is convenient in use and very ideal.

The present invention will become clearer in light of the following detailed description of illustrative embodiments of this invention described in connection with the drawings.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded, perspective view of a connecting member for an abrasive member of an embodiment according to the present invention.

FIG. 2 is a cross sectional view of the connecting member of FIG. 1.

FIG. 3 is a cross sectional view of a conventional sandpaper wheel.

FIG. 4 is a cross sectional view illustrating use of the sandpaper wheel of FIG. 3.

DETAILED DESCRIPTION OF THE INVENTION

With reference to FIGS. 1 and 2, a connecting member for an abrasive member according to the present invention includes a body 1 and a fixing member 2. The body 1 includes a connecting portion 11, a cylindrical portion 13 connected to an end of the connecting portion 11, and an opening 14. The connecting portion 11 has polygonal cross sections, such as hexagonal cross sections. The cylindrical portion 13 has a compartment 12. The compartment 12 includes an inner periphery having an inner threaded portion 121. The opening 14 intercommunicates with the compartment 12.

Preferably, connecting portion 11 includes an outer periphery having an annular groove 111 in an appropriate location for coupling with a chuck.

The fixing member 2 includes a stopper portion 21 and an outer threaded portion 22 integrally connected to the stopper portion 21 and threadedly engaged with the inner threaded portion 121.

With reference to FIG. 2, in use, the outer threaded portion 22 of the fixing member 2 extends through an axial hole 31 of an abrasive member 3. Then, the outer threaded portion 22 of the fixing member 2 is threadedly engaged with the inner threaded portion 121 of the body 1, such that a bottom face 131 of the cylindrical portion 13 of the body 1 and the top face 211 of the stopper portion 21 of the fixing member 2 together clamp an upper face 32 and a lower face 33 of the abrasive member 3, thereby securely fixing the abrasive member 3 and the body 1 together.

Since the abrasive member 1 and the body 1 are securely fixed as a single member and since the body 1 includes a connecting portion 11 having polygonal cross sections, the present invention can be coupled with an electric or pneumatic grinding tool having a three jaw chuck but no shafts. This effectively solves the disadvantages of conventional abrasive members and is ideal. The structure is hitherto unknown and novel and provides an effect that cannot be achieved by conventional abrasive members. The present invention is inventive and has a simple structure with industrial applicability.

Although specific embodiments have been illustrated and described, numerous modifications and variations are still possible without departing from the scope of the invention. The scope of the invention is limited by the accompanying claims.