Patent Application
20240359292
This application claims priority to Taiwanese Utility Model Patent Application No. 112203959, filed on Apr. 26, 2023, the entire disclosure of which is incorporated by reference herein.
The disclosure relates to a belt sander, and more particularly to a belt sander and a shield thereof.
Referring to
It is noted that, in order to meet different needs, the sanding belt 13 comes in different thicknesses. The sanding belt 13 may be a thinner one such as a sanding belt having abrasive grains, or a thicker one such as a non-woven sanding belt. Thus, the lateral opening 122 of the conventional belt sander 1 is generally designed to be relatively large so as to fit the different thicknesses of the sanding belt 13. However, according to the international standard published by the International Electrotechnical Commission (IEC), a width of a gap that is in a space which spatially communicates with the lateral opening 122 and that is between the sanding belt 13 and the mounting frame 12 must be smaller than 7 millimeters. Since a width of the lateral opening 122 is not adjustable, when a relatively thin sanding belt is adopted as the sanding belt 13, with the lateral opening 122 that is designed to be relatively large, the conventional belt sander 1 may not be in compliance with the international standard.
Therefore, an object of the disclosure is to provide a shield that can alleviate the drawback of the prior art.
According to the disclosure, the shield is adapted to be mounted to a belt sander. The belt sander includes a machine body, a housing that is rotatably connected to the machine body, and a sanding belt that is mounted to the housing and that is drivable to rotate around a first axis. The shield includes a main plate unit and an extension plate unit. The main plate unit is adapted for cooperating with the housing to define a protection space that is adapted for accommodating a portion of the sanding belt. The extension plate unit extends from the main plate unit toward the sanding belt. The extension plate unit is adapted for cooperating with the housing to define an opening that is in spatial communication with the protection space, and that is adapted for another portion of the sanding belt to extend therethrough. The extension plate unit is spaced apart from the sanding belt in a first extending direction of the first axis, and is adapted for cooperating with the sanding belt to define a first gap therebetween in the first extending direction. The extension plate unit is spaced apart from the sanding belt in a second extending direction of a second axis substantially orthogonal to the first axis, and is adapted for cooperating with the sanding belt to define two second gaps therebetween in the second extending direction.
Another object of the disclosure is to provide a belt sander that can alleviate the drawback of the prior art.
According to the disclosure, the belt sander includes the shield as mentioned above, a machine body, a housing, and a sanding belt. The machine body includes a rotating shaft that is drivable by electric power to rotate about a first axis. The housing is rotatably connected to the machine body. The sanding belt is mounted to the housing, and is drivable by the rotating shaft to rotate around the first axis. The shield is removably connected to the housing.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment(s) with reference to the accompanying drawings. It is noted that various features may not be drawn to scale.
It should be noted herein that for clarity of description, spatially relative terms such as “top,” “bottom,” “upper,” “lower,” “on,” “above,” “over,” “downwardly,” “upwardly” and the like may be used throughout the disclosure while making reference to the features as illustrated in the drawings. The features may be oriented differently (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein may be interpreted accordingly.
Referring to
The machine body 2 includes an outer housing 21, and a motor 22 that is disposed in the outer housing 21. The motor 22 includes a rotating shaft 221 that extends through the outer housing 21, and that is drivable by electric power to rotate about a first axis (X).
The housing 3 is rotatably connected to the machine body 2.
The sanding belt 4 is mounted to the housing 3, and is drivable by the rotating shaft 221 to rotate around the first axis (X). In this embodiment, the sanding belt 4 has two revolve sections 41 that are spaced apart from each other along a second axis (Z). Each of the revolve sections 41 is elongated along a third axis (Y). The third axis (Y), the second axis (Z), and the first axis (X) are substantially orthogonal to each other, and respectively extend in a third extending direction (Y1), a second extending direction (Z1), and a first extending direction (X1).
Referring further to
The main plate unit 51 is removably connected to the housing 3, and cooperates with the housing 3 to define a protection space 50 that accommodates the rotating shaft 221 and a portion of the sanding belt 4.
In this embodiment, the plate units 51 includes a main plate 511, and two side plates 511′ each of which is connected to the main plate 511. A cross section of the main plate unit 51 on an imaginary plane that has a normal vector in the third extending direction (Y1) is substantially U-shaped. The side plates 511′ are spaced apart from each other along the second axis (Z), and respectively face the revolve sections 41 of the sanding belt 4. The main plate 511 is perpendicular to the first axis (X), and faces the housing 3 and the sanding belt 4. The main plate 511 is elongated in the third extending direction (Y1). Each of the side plates 511′ extends in the third extending direction (Y1). A length of the main plate 511 in the third extending direction (Y1) is greater than a length of each of the side plates 511′ in the third extending direction (Y1).
The extension plate unit 52 extends from the main plate unit 51 toward the sanding belt 4. The extension plate unit 52 cooperates with the housing 3 to define an opening 520 that is in spatial communication with the protection space 50. Another portion of the sanding belt 4 extends through the opening 520. Each of the main plate 511 and the side plates 511′ has an opening end 512 that is adjacent to the opening 520, and a contact end 513 that is opposite to the opening end 512 and that is in contact with the housing 3 (see
In this embodiment, the extension plate unit 52 and the main plate unit 51 are integrally formed as one piece. The extension plate unit 52 includes three extension plates 521 that are spaced apart from each other, and that cooperate with the housing 3 to define the opening 520. Each of the extension plates 521 is connected to the opening end 512 of a respective one of the main plate 511 and the side plates 511′. One of the extension plates 521 that is connected to the opening end 512 of the main plate 511 is spaced apart from the sanding belt 4 in the first extending direction (X1) of the first axis (X), and cooperates with the sanding belt 4 to define a first gap (d1) therebetween in the first extending direction (X1). Each of two of the extension plates 521 that are respectively connected to the opening ends 512 of the side plates 511′ is spaced apart from a respective one of the revolve sections 41 of the sanding belt 4 in the second extending direction (Z1) of the second axis (Z), and cooperates with the respective one of the revolve sections 41 to define a second gap (d2) therebetween in the second extending direction (Z1) (i.e., the extension plate unit 52 cooperates with the sanding belt 4 to define two second gaps (d2) therebetween in the second extending direction (Z1)). A width of each of the first gap (d1) and the second gaps (d2) is smaller than 7 millimeters.
Referring to
By virtue of the main plate 511, the side plates 511′, and the extension plates 521, when the sanding belt 4 is driven by the rotating shaft 221 to grind an object (not shown), dust that is generated during operation of the belt sander is prevented from leaving the protection space 50, thereby protecting the user. Moreover, by virtue of the extension plate unit 52 cooperating with the housing 3 to define the opening 520, a size of the opening 520 is limited by the extension plates 521. Since the width of each of the first gap (d1) and the second gaps (d2) is smaller than 7 millimeters, foreign matters are prevented from entering the belt sander through the opening 520. Therefore, the belt sander is in compliance with the international standard published by the International Electrotechnical Commission (hereinafter IEC).
It is noted that, the number of the engaging blocks 42 and the number of the engaging grooves 212 may be any positive integers according to actual requirements, the number of the extension plates 521 of the shield 5 may not be limited to three as shown in
It is noted that, as shown in
Since the operation of the belt sander is widely-understood by those skilled in the art, detailed descriptions thereof are omitted.
In summary, the embodiment of the belt sander offers several benefits as follows. By virtue of the main plate unit 51, dust and debris are prevented from leaving the protection space 50, thereby reducing scattering of the dust and the debris during the operation of the belt sander. Moreover, by virtue of the extension plate unit 52 cooperating with the housing 3 to define the opening 520, the size of the opening 520 is adjustable via the replacement of the shield 5 or the replacement of the extension plate unit 52. Therefore, the belt sander is suitable for sanding belts having different thicknesses while being in compliance with safety regulations.
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiment(s). It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects; such does not mean that every one of these features needs to be practiced with the presence of all the other features. In other words, in any described embodiment, when implementation of one or more features or specific details does not affect implementation of another one or more features or specific details, said one or more features may be singled out and practiced alone without said another one or more features or specific details. It should be further noted that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.
While the disclosure has been described in connection with what is (are) considered the exemplary embodiment(s), it is understood that this disclosure is not limited to the disclosed embodiment(s) but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
| Number | Date | Country | Kind |
|---|---|---|---|
| 112203959 | Apr 2023 | TW | national |
