U.S. patent application number 12/068855 was filed with the patent office on 2010-12-23 for grinding disc structure.
Invention is credited to Chuan-ching Cheng, Yung-yung Sun.
Application Number | 20100323594 12/068855 |
Document ID | / |
Family ID | 43354745 |
Filed Date | 2010-12-23 |
United States Patent
Application |
20100323594 |
Kind Code |
A1 |
Sun; Yung-yung ; et
al. |
December 23, 2010 |
Grinding disc structure
Abstract
An improved grinding disc structure includes a support disc
having first through holes and second through holes; a main disc
body, with a distal surface connected onto the support disc, and
having dust exhaust holes, a longitudinal guiding portion at the
center, and a longitudinal guiding portion with outwardly extended
transverse guiding portions and each dust exhaust hole
corresponding to each first through hole, and each transverse
guiding portion corresponding to each second through hole, and each
transverse guiding portion being not interconnected with each dust
exhaust hole; a grinding layer, disposed on another distal surface
of the main disc body, and having through holes corresponding to
each dust exhaust hole and the longitudinal guiding portion, such
that each dust exhaust hole and the longitudinal guiding portion
achieve the dust collection effect for the external portion and
center of the grinding disc.
Inventors: |
Sun; Yung-yung; (Dali City,
TW) ; Cheng; Chuan-ching; (Taichung City,
TW) |
Correspondence
Address: |
Wang Law Firm, Inc.
4989 Peachtree Parkway,, Suite 200
Norcross
GA
30092
US
|
Family ID: |
43354745 |
Appl. No.: |
12/068855 |
Filed: |
February 12, 2008 |
Current U.S.
Class: |
451/360 |
Current CPC
Class: |
B24B 55/102 20130101;
B24D 9/08 20130101 |
Class at
Publication: |
451/360 |
International
Class: |
B24B 41/00 20060101
B24B041/00 |
Claims
1. An improved grinding disc structure, comprising: a support disc,
coupled with a grinding machine having a vacuum hood, and said
support disc having a plurality of first through holes and a
plurality of second through holes thereon; a main disc body, with a
distal surface coupled onto said support disc, and said distal
surface of said main disc body having a plurality of dust exhaust
holes, and said each dust exhaust hole being interconnected with
said each corresponding first through hole on the support disc, and
the center position of said main disc body having a longitudinal
guiding portion, and said longitudinal guiding portion having a
plurality of transverse guiding portions extended towards an
external rim of said main disc body, and said each transverse
guiding portion being interconnected with said each corresponding
second through hole on said support disc, and a blocking portion
being disposed between said each transverse guiding portion and
said each dust exhaust hole, such that said each transverse guiding
portion is not interconnected with said each dust exhaust hole; and
a grinding layer, coupled to another distal surface of said main
disc body, and having a plurality of through holes disposed on said
grinding layer and interconnected with said each dust exhaust hole
corresponding to said longitudinal guiding portion.
2. The improved grinding disc structure of claim 1, wherein said
support disc includes a connecting element protruded from the
center of said support disc, and said support disc is coupled to
said grinding machine by said connecting element.
3. The improved grinding disc structure of claim 1, wherein said
each dust exhaust hole includes a passage externally interconnected
with the periphery of said main disc body.
4. The improved grinding disc structure of claim 1, wherein said
each transverse guiding portion is interconnected with said each
corresponding second through hole on said support disc by an
external distal end of said transverse guiding portion.
5. The improved grinding disc structure of claim 1, wherein said
grinding layer is comprised of an adhesive plate and a grinding
sand paper.
6. An improved grinding disc structure, comprising: a support disc,
coupled with a grinding machine having a vacuum hood, and said
support disc having a plurality of through holes thereon; a main
disc body, with a distal surface coupled onto said support disc,
and the center position of said main disc body having a
longitudinal guiding portion, and said longitudinal guiding portion
having a plurality of transverse guiding portions extended in a
direction towards an external rim of said main disc body, and said
each transverse guiding portion being interconnected with said each
corresponding second through hole on said support disc; and a
grinding layer, coupled to another distal surface of said main disc
body, and having a through hole disposed on said grinding layer and
interconnected with said the longitudinal guiding portion.
7. The improved grinding disc structure of claim 6, wherein said
support disc includes a connecting element protruded from the
center of said support disc, and said support disc is coupled to
said grinding machine by said connecting element.
8. The improved grinding disc structure of claim 6, wherein said
main disc body further comprises a plurality of dust exhaust holes
disposed on a distal surface of said main disc body, and said
support disc further comprises a through hole interconnected with
said each corresponding dust exhaust hole.
9. The improved grinding disc structure of claim 8, wherein said
each dust exhaust hole includes a passage externally interconnected
with the periphery of said main disc body.
10. The improved grinding disc structure of claim 8, further
comprising a blocking portion disposed between said each dust
exhaust hole and said each transverse guiding portion, such that
said each transverse guiding portion is not interconnected with
said each dust exhaust hole.
11. The improved grinding disc structure of claim 6, wherein said
each transverse guiding portion is interconnected with said each
corresponding through hole on said support disc by an external
distal end of said transverse guiding portion.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a grinding machine, and
more particularly to an improved grinding disc structure.
[0003] 2. Description of the Related Art
[0004] When a grinding machine is used for grinding objects,
debrises are usually produced after the objects are ground, and the
debrises not only affects the health of workers, but also makes the
working environment dirty and untidy. Therefore, it is an important
subject for grinding machine manufacturers to find a way of
collecting the debrises while grinding objects. In FIG. 4, an
improved grinding disc structure comprises a vacuum hood 1, a base
2, a main disc body 3 and a grinding layer 4 stacked sequentially
with each other, wherein the base 2 is connected with a main shaft
6 of a grinding machine 5, such that the grinding disc is driven by
the main shaft 6 of the grinding machine 5 to rotate to perform the
grinding action, and the main disc body 3 includes a penetrating
dust exhaust hole 7 with an external passage 8 externally
interconnected with a distal end of the main disc body 3, such that
when the structure is used for grinding, the debrises produced
around the grinding disc will be vacuumed from the external passage
8 and the dust exhaust hole 7 into the vacuum hood 1 to achieve the
dust collection effect. However, the debrises produced at the
center of the grinding disc cannot be removed effectively, and thus
the debrises are accumulated at the center of the grinding disc and
the grinding work is frequently affected. Obviously, such grinding
disc structure capable of collecting debrises at the external
portion of the grinding disc only requires further
improvements.
[0005] In FIG. 5, an improved design for removing debrises from the
center of the grinding disc is provided, wherein the center of the
grinding disc has a middle hole 9 with an internal passage 10
interconnected with the external passage 8, so that the debrises at
the center of the grinding disc can be vacuumed into the vacuum
hood 1 through the internal passage 10 and the dust exhaust hole 7.
However, the sucking force of the grinding disc of the sort mainly
comes from the dust exhaust hole 7, and thus the debrises at the
center of the grinding disc must be vacuumed from the dust exhaust
hole 7 through the internal passage 10. Since the distance of the
internal passage 10 is relatively long, therefore the debrises at
the center cannot be vacuumed completely, and the dust exhaust hole
7 must be able to remove the debris from the center and the
external portion of the grinding disc, and the sucking force will
be seriously divided and weaken.
[0006] Referring to FIG. 6 for the design of another grinding disc
structure, the main disc body 3 similarly has a middle hole 9, and
the base 2 has a plurality of through holes 11 penetrating through
the main disc body 3 and interconnected with the middle hole 11, so
that the debrises at the center of the grinding disc can be
vacuumed into the vacuum hood 1 through the through holes 11, but
such through holes designed directly on the base 2 has the
following major drawback. Since the base 2 is provided for
connecting the main shaft 6 of the grinding machine 5 to drive the
grinding disc to rotate, a high strength is required. If holes are
punched directly on the base 2, the structural strength of the base
2 will be reduced greatly, and the overall safety of the grinding
machine will be affected adversely. To take the structural strength
into consideration, the through holes 11 generally come with a
small design and an appropriate quantity. As a result, the through
holes 11 will be clogged by debrises easily, and the effect of
removing the debrises at the center of the grinding disc will no
longer exist.
SUMMARY OF THE INVENTION
[0007] Therefore, it is a primary objective of the present
invention to provide an improved grinding disc structure for
achieving the dust collection effect for both the external portion
and the center of the grinding disc.
[0008] To achieve the foregoing objective, the present invention
provides an improved grinding disc structure, comprising: a support
disc, coupled with a grinding machine having a vacuum hood, and the
support disc having a plurality of first through holes and a
plurality of second through holes thereon; a main disc body, with a
distal surface coupled onto the support disc, and the distal
surface of the main disc body having a plurality of dust exhaust
holes, and each dust exhaust hole being interconnected with each
corresponding first through hole on the support disc, and the
center position of the main disc body having a longitudinal guiding
portion, and the longitudinal guiding portion having a plurality of
transverse guiding portions extended towards an external rim of the
main disc body, and each transverse guiding portion being
interconnected with each corresponding second through hole on the
support disc, and a blocking portion being disposed between each
transverse guiding portion and each dust exhaust hole, such that
each transverse guiding portion is not interconnected with each
dust exhaust hole; and a grinding layer, coupled to another distal
surface of the main disc body, and having a plurality of through
holes disposed on the grinding layer and interconnected with each
dust exhaust hole corresponding to the longitudinal guiding
portion.
[0009] Therefore, each dust exhaust hole and the longitudinal
guiding portion can achieve the dust collection effect for the
interior and the center of the grinding disc respectively.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is an exploded view of the present invention;
[0011] FIG. 2 is a sectional view of the present invention;
[0012] FIG. 3 is a schematic view of using the present
invention;
[0013] FIG. 4 is a schematic view of a prior art grinding disc;
[0014] FIG. 5 is a schematic view of another prior art grinding
disc; and
[0015] FIG. 6 is a schematic view of a further prior art grinding
disc.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0016] The objective, technical measures and performance of the
present invention will become apparent in the detailed description
of the preferred embodiments with reference to the accompanying
drawings as follows:
[0017] Referring to FIGS. 1 to 3, the present invention provides an
improved structure of a grinding disc 12 comprising a support disc
21, a main disc body 31 and a grinding layer 41 stacked
sequentially with each other.
[0018] The support disc 21 is coupled with a grinding machine 51
having a vacuum hood 52, and includes a connecting element 22
protruded from the center of the support disc 21 and connected to a
main shaft 54 of the grinding machine 51 through the connecting
element 22, and six first through holes 24 disposed around the top
of the support disc 21, and the support disc 21 includes three
second through holes 26 around the center of the support disc
21.
[0019] The top of the main disc body 31 is coupled to a distal
surface of the support disc 21, and the distal surface of the main
disc body 31 includes six penetrating dust exhaust holes 32, each
interconnected with each first through hole 24 on the support disc
21, and each dust exhaust hole 32 includes a passage 34
interconnected externally with the periphery of the main disc body
31, and the center of the main disc body 31 has a longitudinal
guiding portion 36 penetrating through the bottom of the main disc
body 31, and the longitudinal guiding portion 36 includes three
transverse guiding portions 38 extended towards the each disc body
31, and the external edge of the transverse guiding portion 38 is
interconnected with each second through hole 26 on the support disc
21, and a blocking portion 39 is disposed between each transverse
guiding portion 38 and each dust exhaust hole 32, such that each
transverse guiding portion 38 is not interconnected with each dust
exhaust hole 32.
[0020] The grinding layer 41 is formed by connecting an adhesive
plate 42 and a grinding sand paper 44, and the grinding layer 41 is
disposed at the bottom of the main disc body 31, and the grinding
layer 41 includes seven through holes 46 corresponding to each dust
exhaust hole 32 and the longitudinal guiding portion 36.
[0021] When the invention is in use as shown in FIG. 3, the support
disc 21, the main disc body 31 and the grinding layer 41 are
stacked sequentially to form the structure of a grinding disc 12,
and a connecting element 22 on the support disc 21 is used for
connecting a main shaft 54 of the grinding machine 51, such that
debrises produced around the external periphery of the grinding
disc 12 during the grinding process are sucked through the passage
34 by the effect of the vacuum hood 52, and then transmitted and
collected into the vacuum hood 52 through the dust exhaust hole 32.
In the meantime, the debrises at the center of the grinding disc 12
are sucked through the longitudinal guiding portion 36 by the
effect of the vacuum hood 52, and then transmitted and collected
into the vacuum hood 52 through the transverse guiding portion
38.
[0022] The present invention uses the blocking portion 39 to
isolate each dust exhaust hole 32 from each transverse guiding
portion 38, so that they are not interconnected, and each dust
exhaust hole 32 and each transverse guiding portion 38 do not
interfere with each other during the dust collection process.
Therefore, each dust exhaust hole 32 and its corresponding passage
34 achieve the effect of collecting debrises at the external
portion of the grinding disc 12, and the longitudinal guiding
portion 36 and each transverse guiding portion 38 achieve the
effect of collecting debrises at the center of the grinding disc
12. Since each transverse guiding portion 38 is very close to the
center of the grinding disc 12, therefore the debrises at the
center of the grinding disc 12 can be sucked successfully into the
vacuum hood 52 to overcome the drawback of having debrises remained
at the center of the grinding disc 12 due to an insufficient
sucking force. Further, the transverse guiding portions 38 come
with a sufficient space for containing the debrises, and thus there
will be no clogging problem caused by the debrises.
* * * * *