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High-efficiency dust collecting device with two gateways

High-efficiency dust collecting device with two gateways description/claims

1. Field of the invention

This invention relates to a sand grinder, particularly to one installed with a high-efficiency dust-collecting device with two gateways, able to effectively collect dust or wood flour generated while grinding a wood workpiece.

2. Description of the Prior Art

Commonly, as shown in FIGS. 1 and 2, a conventional dust collector 20 is installed between an exit 12 set above a cover 11 of a sand grinder 10 and one side of a roller 13. The dust collector 20 is provided with a blocking plate 21, two side plates 22, a dust blocker 23 and a flexible extender 24. The side plates 22 formed triangular are fixed at two sides of the blocking plate 21, respectively provided with an arc-like edge 221 formed in its one side for fixing with the dust blocker 23, so that a sucking mouth 25 is formed between the dust blocker 23 and the blocking plate 21 to suck powder dust or wood flour made by the roller 13 through the exit 12 to a collector. But, because the exit 12 is located at the intermediate portion of the blocking plate 21, the powder dust or the wood flour is apt to accumulate at the side plates 22 and in the interface and the gap between the blocking plate 21 and the dust blocker 23, unable to effectively collect dust. Suppose a better sucking is to be achieved, a larger power collector is the only solution, relatively increasing cost. Moreover, the assembly of the dust collector 20 is complicated and each roller 13 needs a set of the dust collector 2 0, causing an inconvenience for assembly or operation.

The objective of this invention is to offer a high-efficiency dust-collecting device with two gateways for a sand grinder.

The main characteristics of the invention are a first gateway set and a second gateway set, which are both formed integrally with a metallic panel. The dust-collecting device is connected with exits of a cover of the sand grinder and above two sanding belt rollers. Each of the gateway sets is provided with an arc-like panel, a blocking plate, and two dust-guiding plates. A gateway is formed between the arc-like panel and the blocking plate so as to suck in the dust or the wood flour generated while grinding a workpiece. The dust or the wood flour is then sucked further to pass through the exits to the collecting device, favored by the dust-guiding plates. The collecting position of the dust collecting device is raised high enough so that the device can effectively collect the dust via help of the dust-guiding plates shaped oblique, keeping the sanding belt rollers free from dust, advancing the processed precision of the workpiece, prolonging the service life of the sanding belt rollers and needing only a relatively small power motor for a reduction of cost. Moreover, the dust-collecting device is formed integrally by a metallic panel, it is easy to be installed under the cover, providing a simple assembly and a low cost.

This invention is better understood by referring to the accompanying drawings, wherein:

FIG. 1 is a perspective view of a conventional dust collector;

FIG. 2 is a side view of the conventional dust collector, showing it being assembled in the sand grinder;

FIG. 3 is a perspective view of a sand grinder installed with a high-efficiency dust collecting device in the present invention;

FIG. 4 is a perspective view of a preferred embodiment of a high-efficiency dust-collecting device with two gateways in the present invention;

FIG. 5 is a side view of the preferred embodiment of a high-efficiency dust-collecting device with two gateways in the present invention, showing it being assembled in the sand grinder;

FIG. 6 is a general illustration of the preferred embodiment of a high-efficiency dust collecting device with two gateways in the present invention, showing a distribution of suction trail; and

FIG. 7 is a partial detailed illustration of the preferred embodiment of a high-efficiency dust collecting device with two gateways in the present invention, showing how a suction current flows.

• Provisional Patent
• Utility Patent

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