U.S. patent application number 13/067715 was filed with the patent office on 2012-08-02 for grinding mechanism.
This patent application is currently assigned to Green Energy Technology Inc.. Invention is credited to Po-Chung Chen, Toshiharu Nakata, Ming-Chin Wang.
Application Number | 20120196518 13/067715 |
Document ID | / |
Family ID | 44900737 |
Filed Date | 2012-08-02 |
United States Patent
Application |
20120196518 |
Kind Code |
A1 |
Chen; Po-Chung ; et
al. |
August 2, 2012 |
Grinding mechanism
Abstract
A grinding mechanism includes a rotating body, a first grinding
wheel, a second grinding wheel, a first fastening means, a second
fastening means, and a spacer assembly, a first fastening means
passing through the first body portion and fastening into the
rotating body, a second grinding wheel including a second body
portion and a second grinding portion. The first and the second
grinding portions have different diameter from each other, and are
spaced from each other axially, and have different grinding
precisions. The spacer assembly is interposed between the first
grinding wheel and the second grinding wheel. The second fastening
means passes through the second body portion and the spacer
assembly, and threadedly fastens into the first body portion, so as
to press and secure the second body portion and the spacer assembly
against and on the first body portion.
Inventors: |
Chen; Po-Chung; (Guanyin
Township, TW) ; Nakata; Toshiharu; (Guanyin Township,
TW) ; Wang; Ming-Chin; (Guanyin Township,
TW) |
Assignee: |
Green Energy Technology
Inc.
Taipei
TW
|
Family ID: |
44900737 |
Appl. No.: |
13/067715 |
Filed: |
June 22, 2011 |
Current U.S.
Class: |
451/463 |
Current CPC
Class: |
B24B 29/005 20130101;
B24B 41/04 20130101; B24B 45/00 20130101; B24D 13/10 20130101; B24D
7/14 20130101 |
Class at
Publication: |
451/463 |
International
Class: |
B24D 5/00 20060101
B24D005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 28, 2011 |
TW |
100202084 |
Claims
1. A grinding mechanism, comprising: a rotating body; a first
grinding wheel, including a first body portion and a first grinding
portion; at least one first fastening means, passing through the
first body portion and threadedly fastening into the rotating body
so as to press and secure the first body portion against and on the
rotating body; a second grinding wheel, including a second body
portion and a second grinding portion, wherein the first and the
second grinding portions have different diameters from each other,
and are spaced from each other axially, and have different grinding
precisions; a spacer assembly, being interposed between the first
grinding wheel and the second grinding wheel; and at least one
second fastening means, passing through the second body portion and
the spacer assembly and threadedly fastening into the first body
portion so as to press and secure the second body portion and the
spacer assembly against and on the first body portion of the first
grinding wheel.
2. The grinding mechanism as claimed in claim 1, wherein the first
grinding wheel relates to a sand wheel.
3. The grinding mechanism as claimed in claim 2, wherein the second
grinding wheel relates to a brush wheel.
4. The grinding mechanism as claimed in claim 1, wherein the second
grinding wheel relates to a brush wheel.
5. The grinding mechanism as claimed in claim 1, wherein the spacer
assembly consists of at least one elastic sheet.
6. The grinding mechanism as claimed in claim 5, wherein the at
least one elastic sheet is a rubber elastic sheet.
7. The grinding mechanism as claimed in claim 1, wherein the at
least one first fastening means relates to a bolt.
8. The grinding mechanism as claimed in claim 1, wherein the at
least one second fastening means relates to a bolt.
9. The grinding mechanism as claimed in claim 1, wherein the
rotating body is internally provided with a slurry channel for
flowing of grinding slurry.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a grinding mechanism, and
more particularly, to a grinding mechanism having a function of
adjusting the position of grinding wheels.
[0003] 2. Description of Related Art
[0004] Currently grinding facilities have been widely adopted,
particularly use of grinding wheels (for example sand wheels or
brush wheels) can be seen in manufacturing factories such that
surfaces of ground workpieces are polished and smooth. Accordingly,
grinding wheels are widely welcomed by public consumers.
[0005] For conventional sand wheels, abrasive grains in a sand
wheel are approximately of the same grade. Therefore, in case
people intend to proceed with a mirror grinding on workpieces, they
need to perform, in sequence, a rough grinding process and then a
fine grinding process so as to obtain ground workpieces as desired.
In other words, respective working processes with sand wheels of
abrasive grains of various grades, or with a brush wheel for a fine
grinding process, are necessary. A conventional design resides in
mounting dual sand wheels of different specifications on two
driving devices in a grinding machine, for example, the
conventional grinding machine, as shown in FIG. 1, has two sand
wheels 1,2 driven, respectively, by different motors 3,4.
[0006] However, it is rather cumbersome for those who undertake the
above-mentioned working processes. Even if a rough-grinding wheel
and a fine-grinding wheel (or a brush wheel) use the same driving
device, steps of attaching and detaching the grinding wheels/brush
wheel are indispensable. In these occasions, people have to take
into account of the problems such as dynamic balance,
concentricity, roundness, and so forth, when attaching and
detaching the grinding wheels. Taking care of these problems is of
very much time consuming.
SUMMARY OF THE INVENTION
[0007] An object of the present invention is to provide a grinding
mechanism, so that on the one hand, working steps can be decreased,
and on the other, the position of grinding wheels can be adjusted
easily.
[0008] To achieve the above-mentioned purpose, the grinding
mechanism, according to the present invention, comprises a rotating
body, a first grinding wheel, a second grinding wheel, at least one
first fastening means, at least one second fastening means, and a
spacer assembly, wherein the spacer assembly is interposed between
the first grinding wheel and the second grinding wheel.
[0009] According to the present invention, the first grinding wheel
includes a first body portion and a first grinding portion; while
the second grinding wheel includes a second body portion and a
second grinding portion. The first and the second grinding portions
have different diameters from each other, and are spaced from each
other axially, and have different grinding precisions.
[0010] The at least one first fastening means passes through the
first body portion and threadedly fastens into the rotating body so
as to press and secure the first body portion against and on the
rotating body. The at least one second fastening means passes
through the second body portion and the spacer assembly, and
threadedly fastens into the first body portion, so as to press and
secure the second body portion and the spacer assembly against and
on the first body portion of the first grinding wheel.
[0011] Through the above-mentioned structure, not only energy and
facility cost can be saved by only using one single driving device
to drive the two grinding wheels, but also a rough grinding and a
fine grinding can be accomplished within a grinding process.
Besides, adjustment on the spacing between the two grinding wheels
is very easy.
[0012] The first grinding wheel may relate to a sand wheel, while
the second grinding wheel to a brush wheel. In particular, such
assembly can be employed in an occasion where a high grinding
precision is required, for instance wafer grinding. Both the at
least one first and second fastening means may relate to bolts.
[0013] Further, according to the present invention, the spacer
assembly may consist of at least one elastic sheet, for instance
rubber elastic sheet so as to facilitate a fine adjustment on the
spacing between the two grinding wheels, and to absorb the stress
incurred by the fastening means.
[0014] Still further, according to the present invention, the
rotating body may internally be provided with a slurry channel for
flowing of grinding slurry.
[0015] Other objects, advantages, and novel features of the present
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is a perspective view illustrating a conventional
grinding machine with dual grinding wheels;
[0017] FIG. 2 is a cross-sectional view illustrating a grinding
mechanism according to the present invention; and
[0018] FIG. 3 is an exploded view illustrating the grinding
mechanism according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0019] Referring to FIGS. 2 and 3, cross-sectional and exploded
views illustrating a grinding mechanism according to the present
invention, the grinding mechanism comprises a rotating body 10, a
first grinding wheel 13, a second grinding wheel 14, a spacer
assembly 15, a plurality of first fastening means 31, and a
plurality of second fastening means 32. According to the present
invention, the rotating body 10 consists of a motor spindle 11 and
a flange 12, wherein the flange 12 is threadedly engaged on an end
of the motor spindle 11 by bolts 30 such that the flange 12 and the
motor spindle 11 are coaxially arranged so as to rotate
synchronously. The rotating body 10 is internally provided with a
slurry channel 121 for flowing of grinding slurry.
[0020] According to the present invention, the first grinding wheel
13, relating to a cup-like sand wheel, includes a first body
portion 131 and a first grinding portion 132 having abrasive grains
where the first body portion 131 and the first grinding portion 132
are fixed together. The second grinding wheel 14, relating to a
cup-like brush wheel, includes a second body portion 141 and a
second grinding portion 142 having bristles where the second body
portion 141 and the second grinding portion 142 are fixed
together.
[0021] The first body portion 131 of the first grinding wheel 13 is
threadedly fastened to an end surface of the flange 12 by the first
fastening means 31 for instance bolts. The spacer assembly 15
consists of a plurality of spacers 151 made of the same or
different materials. In the present invention, the spacer 151
relates to at least one resilient sheet, particularly rubber
elastic sheet.
[0022] The second fastening means 32, for instance bolts, pass
through both the second body portion 141 of the second grinding
wheel 14 and the spacer assembly 15, and threadedly fasten into the
first body portion 131 of the first grinding wheel 13 such that the
second grinding wheel 14 and the spacer assembly 15 can be securely
attached to the first grinding wheel 13.
[0023] According to the present invention, the first grinding wheel
13, which is a sand wheel, is employed for a rough grinding on
workpieces; while the second grinding wheel 14, which is a brush
wheel, is employed for a fine grinding on workpieces. In other
words, the second grinding wheel 14 has a higher grinding
precision. Further, since the first grinding wheel 13 has a
diameter greater than that of the second grinding wheel 14, the
first grinding portion 132 is farther away from an axis X of the
rotating body 10 than the second grinding portion 142. The second
grinding portion 142 extends, in an axial direction, further
downward than the first grinding portion 132, and that a spacing h
between them is determined in accordance with requirement in
application. The spacing h refers to a distance between outmost end
surfaces (free end surfaces) of the first grinding portion 132 and
of the second grinding portion 142.
[0024] Through the above-mentioned structure, when the grinding
mechanism performs a workpiece grinding, the outside-located first
grinding portion 132 will be first employed to perform a rough
grinding on a workpiece, then the second grinding portion 142
having bristles will follow for a fine grinding. Therefore, in a
single grinding stroke, both steps of rough grinding and fine
grinding can be accomplished. This will significantly save time and
efforts, and besides, a more precise grinding outcome can be
obtained.
[0025] When the grinding portions 132,142 are worn out and
replacements are required, where the spacing h between the two
grinding portions 132,142 needs to be readjusted or reset, the
second fastening means 32 need to be removed first, and then the
thickness of the spacer assembly 15 is altered by increasing or
decreasing the number of the spacers 151. Accordingly, thickness of
the spacers 151 determines as to how extent the spacing h is
adjusted. That is to say, the thinner the spacers 151 are, the
wider ranges of the adjustment are.
[0026] In particular, the resilient sheets (spacers 151) adopted in
the present embodiment have some merits, namely, their elastic
character not only facilitates a fine adjustment for the spacing h,
but also absorbs the stress incurred by the fastening means
31,32.
[0027] Although the present invention has been explained in
relation to its preferred embodiments, it is to be understood that
many other possible modifications and variations can be made
without departing from the scope of the invention as hereinafter
claimed.
* * * * *