U.S. patent application number 10/313631 was filed with the patent office on 2004-06-10 for table saw having a rotation structure.
Invention is credited to Chin-Chin, Chang.
Application Number | 20040107815 10/313631 |
Document ID | / |
Family ID | 32392934 |
Filed Date | 2004-06-10 |
United States Patent
Application |
20040107815 |
Kind Code |
A1 |
Chin-Chin, Chang |
June 10, 2004 |
TABLE SAW HAVING A ROTATION STRUCTURE
Abstract
A table saw having a rotation structure includes a work table, a
suspension rod, a swing seat, a rotation seat, a push lever, two
torsion springs, and a threaded rod. When the threaded rod is
rotated, the push lever is displaced horizontally to push the
rotation seat to rotate, so that the circular blade is moved
upward, thereby adjusting the cutting height of the circular blade.
Thus, the push lever is urged by the elastic force of the two
torsion springs, so that the push lever is closely and rigidly
combined with the threaded rod, thereby eliminating the clearance
between the push lever and the threaded rod, so that the cutting
height of the circular blade is adjusted exactly and precisely,
thereby enhancing the cutting efficiency of the table saw.
Inventors: |
Chin-Chin, Chang; (Taichung
Hsien, TW) |
Correspondence
Address: |
Connolly Bove Lodge & Hutz LLP
P.O. Box 2207
Wilmington
DE
19899-2207
US
|
Family ID: |
32392934 |
Appl. No.: |
10/313631 |
Filed: |
December 6, 2002 |
Current U.S.
Class: |
83/477.1 ;
83/477.2; 83/582; 83/665; 83/698.51 |
Current CPC
Class: |
Y10T 83/7793 20150401;
Y10T 83/8776 20150401; Y10T 83/7872 20150401; Y10T 83/7726
20150401; Y10T 83/773 20150401; Y10T 83/9469 20150401; B23D 45/067
20130101; Y10T 83/9377 20150401 |
Class at
Publication: |
083/477.1 ;
083/477.2; 083/582; 083/665; 083/698.51 |
International
Class: |
B26D 001/14; B27B
005/00 |
Claims
What is claimed is:
1. A table saw having a rotation structure, comprising: a work
table; a suspension rod secured on a bottom of the work table; a
swing seat pivotally mounted on the suspension rod; a rotation seat
rotatably mounted on the swing seat and having two side plates; a
push lever secured on the rotation seat and having two ends each
protruded outward from a respective one of the two side plates of
the rotation seat; two torsion springs each mounted on a respective
one of the two side plates of the rotation seat and each having a
first end secured on the respective side plate of the rotation seat
and a second end secured on a respective one of the two ends of the
push lever; and a threaded rod rotatably mounted on the swing seat,
and screwed into the push lever.
2. The table saw having a rotation structure in accordance with
claim 1, wherein each of the two side plates of the rotation seat
is provided with a support rack for mounting the respective torsion
spring.
3. The table saw having a rotation structure in accordance with
claim 1, wherein each of the two side plates of the rotation seat
is provided with a catch block rested on the first end of the
respective torsion spring.
4. The table saw having a rotation structure in accordance with
claim 1, wherein each of the two ends of the push lever is formed
with a circular head which is formed with an annular retaining
groove for retaining the second end of the respective torsion
spring.
5. The table saw having a rotation structure in accordance with
claim 1, wherein each of the two side plates of the rotation seat
is formed with an insertion slot, and each of the two ends of the
push lever is formed with a circular head inserted into the
insertion slot of a respective one of the two side plates of the
rotation seat.
6. The table saw having a rotation structure in accordance with
claim 1, wherein the swing seat is substantially inverted
U-shaped.
7. The table saw having a rotation structure in accordance with
claim 1, wherein the rotation seat is substantially U-shaped.
8. The table saw having a rotation structure in accordance with
claim 1, wherein the rotation seat is rotatably mounted on the
swing seat by a pivot shaft.
9. The table saw having a rotation structure in accordance with
claim 1, further comprising a motor seat secured on the rotation
seat to rotate therewith.
10. The table saw having a rotation structure in accordance with
claim 9, further comprising a circular blade rotatably mounted on
the motor seat.
11. The table saw having a rotation structure in accordance with
claim 1, wherein the threaded rod has a distal end extended through
a front panel of the work table.
12. The table saw having a rotation structure in accordance with
claim 1, wherein the threaded rod has a distal end provided with a
hand wheel.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a table saw having a
rotation structure, and more particularly to a table saw having a
rotation structure, wherein the cutting height of the circular
blade is adjusted exactly and precisely, thereby enhancing the
cutting efficiency of the table saw.
[0003] 2. Description of the Related Art
[0004] A conventional table saw in accordance with the prior art
comprises a threaded rod which is rotated to push and rotate a
rotation seat, so that the circular blade is moved upward by
rotation of the rotation seat, thereby adjusting the cutting height
of the circular blade. However, a clearance is formed between the
rotation seat and the threaded rod during rotation of the threaded
rod, so that the cutting height of the circular blade cannot be
adjusted exactly and precisely, thereby decreasing the cutting
efficiency of the conventional table saw.
SUMMARY OF THE INVENTION
[0005] The present invention has arisen to mitigate and/or obviate
the disadvantage of the conventional table saw.
[0006] The primary objective of the present invention is to provide
a table saw having a rotation structure, wherein the push lever is
urged by the elastic force of the two torsion springs, so that the
push lever is closely and rigidly combined with the threaded rod,
thereby eliminating the clearance between the push lever and the
threaded rod during rotation of the threaded rod, so that the
cutting height of the circular blade is adjusted exactly and
precisely, thereby enhancing the cutting efficiency of the table
saw.
[0007] Another objective of the present invention is to provide a
table saw having a rotation structure, wherein the threaded rod is
rotated by the hand wheel, so that the push lever screwed on the
threaded rod is displaced horizontally, so as to push the rotation
seat to rotate relative to the swing seat, so that the circular
blade is moved upward by rotation of the rotation seat to protrude
outward from the cutting slot of the work table, thereby adjusting
the cutting height of the circular blade.
[0008] In accordance with the present invention, there is provided
a table saw having a rotation structure, comprising:
[0009] a work table;
[0010] a suspension rod secured on a bottom of the work table;
[0011] a swing seat pivotally mounted on the suspension rod;
[0012] a rotation seat rotatably mounted on the swing seat and
having two side plates;
[0013] a push lever secured on the rotation seat and having two
ends each protruded outward from a respective one of the two side
plates of the rotation seat;
[0014] two torsion springs each mounted on a respective one of the
two side plates of the rotation seat and each having a first end
secured on the respective side plate of the rotation seat and a
second end secured on a respective one of the two ends of the push
lever; and
[0015] a threaded rod rotatably mounted on the swing seat, and
screwed into the push lever.
[0016] Further benefits and advantages of the present invention
will become apparent after a careful reading of the detailed
description with appropriate reference to the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 is a perspective assembly view of a table saw having
a rotation structure in accordance with a preferred embodiment of
the present invention;
[0018] FIG. 2 is a side plan cross-sectional view of the table saw
having a rotation structure as shown in FIG. 1;
[0019] FIG. 3 is a top plan cross-sectional view of the table saw
having a rotation structure as shown in FIG. 1;
[0020] FIG. 4 is a schematic operational view of the table saw
having a rotation structure as shown in FIG. 2 in use; and
[0021] FIG. 5 is a schematic operational view of the table saw
having a rotation structure as shown in FIG. 3 in use.
DETAILED DESCRIPTION OF THE INVENTION
[0022] Referring to the drawings and initially to FIGS. 1-3, a
table saw in accordance with a preferred embodiment of the present
invention comprises a work table 10 formed with a cutting slot 100
for passage of a circular blade 31 that is used to cut the
workpiece (not shown). A suspension rod 11 is secured on the bottom
of the work table 10. A substantially inverted U-shaped swing seat
15 is pivotally mounted on the suspension rod 11. A substantially
U-shaped rotation seat 16 is rotatably mounted on the swing seat 15
by a pivot shaft 13. A push lever 25 is secured on a first side of
the rotation seat 16.
[0023] A motor seat 30 is secured on a second side of the rotation
seat 16 to rotate therewith. The circular blade 31 is rotatably
mounted on the motor seat 30, and is extended through the cutting
slot 100 of the work table 10. A threaded rod 20 is rotatably
mounted on the swing seat 15, and has a first end screwed into the
push lever 25 and a second end extended through a front panel 21 of
the work table 10 and provided with a hand wheel 22 which is used
to rotate the threaded rod 20.
[0024] In operation, referring to FIGS. 2-5 with reference to FIG.
1, the threaded rod 20 is rotated by the hand wheel 22, so that the
push lever 25 screwed on the threaded rod 20 is displaced
horizontally as shown in FIGS. 3 and 5, so as to push the rotation
seat 16 to rotate about the pivot shaft 13 relative to the swing
seat 15 as shown in FIGS. 2 and 4, so that the motor seat 30 and
the circular blade 31 are moved upward by rotation of the rotation
seat 16, and the circular blade 31 is further protruded outward
from the cutting slot 100 of the work table 10, thereby adjusting
the cutting height of the circular blade 31.
[0025] The rotation seat 16 has two side plates 19 each formed with
an insertion slot 190. The push lever 25 has two ends each formed
with a circular head 26 inserted into the insertion slot 190 of a
respective one of the two side plates 19 of the rotation seat
16.
[0026] The table saw in accordance with the present invention
further comprises two torsion springs 18 each mounted on a
respective one of the two side plates 19 of the rotation seat 16,
and each having a first end secured on the respective side plate 19
of the rotation seat 16 and a second end secured on the circular
head 26 of a respective one of the two ends of the push lever 25.
Each of the two side plates 19 of the rotation seat 16 is provided
with a support rack 17 for mounting the respective torsion spring
18. Each of the two side plates 19 of the rotation seat 16 is
provided with a catch block 192 rested on the first end of the
respective torsion spring 18. The circular head 26 of each of the
two ends of the push lever 25 is formed with an annular retaining
groove 260 for retaining the second end of the respective torsion
spring 18.
[0027] In such a manner, each of the two torsion springs 18 is
mounted on a respective one of the two side plates 19 of the
rotation seat 16, with its first end urged on the catch block 192
of the respective side plate 19 of the rotation seat 16 and with
its second end retained in and urged on the retaining groove 260 of
the respective circular head 26 of the push lever 25.
[0028] Thus, the push lever 25 is urged by the elastic force of the
two torsion springs 18, so that the push lever 25 is closely and
rigidly combined with the threaded rod 20, thereby eliminating the
clearance between the push lever 25 and the threaded rod 20 during
rotation of the threaded rod 20, so that the cutting height of the
circular blade 31 is adjusted exactly and precisely, thereby
enhancing the cutting efficiency of the table saw.
[0029] Accordingly, in the table saw in accordance with the present
invention, the threaded rod 20 is rotated by the hand wheel 22, so
that the push lever 25 screwed on the threaded rod 20 is displaced
horizontally, so as to push the rotation seat 16 to rotate relative
to the swing seat 15, so that the circular blade 31 is moved upward
by rotation of the rotation seat 16 to protrude outward from the
cutting slot 100 of the work table 10, thereby adjusting the
cutting height of the circular blade 31. In addition, the push
lever 25 is urged by the elastic force of the two torsion springs
18, so that the push lever 25 is closely and rigidly combined with
the threaded rod 20, thereby eliminating the clearance between the
push lever 25 and the threaded rod 20 during rotation of the
threaded rod 20, so that the cutting height of the circular blade
31 is adjusted exactly and precisely, thereby enhancing the cutting
efficiency of the table saw.
[0030] Although the invention has been explained in relation to its
preferred embodiment(s) as mentioned above, it is to be understood
that many other possible modifications and variations can be made
without departing from the scope of the present invention. It is,
therefore, contemplated that the appended claim or claims will
cover such modifications and variations that fall within the true
scope of the invention.
* * * * *