U.S. patent application number 11/102710 was filed with the patent office on 2006-05-04 for positioning structure and method for assembling compressor.
This patent application is currently assigned to Chyn Tec.International Co., Ltd. Invention is credited to Chih-Chao Hung, Chien-Chih Kao, Guang-Der Tarng.
Application Number | 20060093505 11/102710 |
Document ID | / |
Family ID | 36262154 |
Filed Date | 2006-05-04 |
United States Patent
Application |
20060093505 |
Kind Code |
A1 |
Tarng; Guang-Der ; et
al. |
May 4, 2006 |
Positioning structure and method for assembling compressor
Abstract
A positioning structure and a method are used to assemble a
scroll compressor for outputting high-pressure fluid. The casing,
supporting stage and the upper scroll are arranged and positioned
by using pin engaged with pin hole. The lower scroll is provided on
a baffle face of the supporting stage. A transmission shaft is
pivotally arranged on the supporting stage with one end connected
to a rotation power source. The transmission shaft comprises a
crank at top thereof and is connected to bottom of the lower scroll
such that the axis of the upper scroll is coaxial with the
transmission shaft of the lower scroll. Moreover, the upper scroll
and the lower scroll have relative acentric rotation to generate
high-pressure fluid.
Inventors: |
Tarng; Guang-Der; (Sijhih
City, TW) ; Hung; Chih-Chao; (Sijhih City, TW)
; Kao; Chien-Chih; (Sijhih City, TW) |
Correspondence
Address: |
HDSL
4331 STEVENS BATTLE LANE
FAIRFAX
VA
22033
US
|
Assignee: |
Chyn Tec.International Co.,
Ltd
|
Family ID: |
36262154 |
Appl. No.: |
11/102710 |
Filed: |
April 11, 2005 |
Current U.S.
Class: |
418/55.1 |
Current CPC
Class: |
F04C 2230/603 20130101;
F04C 18/0207 20130101 |
Class at
Publication: |
418/055.1 |
International
Class: |
F04C 2/00 20060101
F04C002/00; F01C 1/02 20060101 F01C001/02; F04C 18/00 20060101
F04C018/00; F01C 1/063 20060101 F01C001/063 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 29, 2004 |
TW |
093132890 |
Claims
1. A positioning structure for a compressor, the compressor
comprising a casing for mounting a supporting stage, an upper
scroll, a lower scroll and a transmission shaft, the transmission
shaft pivotally connected to an axial hole of the supporting stage
and an axial hole on bottom of the casing and having one end
connected to a rotation power source and having another end
connected to a bottom of the lower scroll for driving the upper
scroll and the lower scroll to have relative acentric rotation and
generating high-pressure fluid, the positioning structure being
characterized in that the supporting stage is fixed to a lower
shell of the casing and the supporting stage comprises at least one
pin hole, the upper scroll comprises at least one corresponding pin
hole, a pin is inserted into the pin hole of the supporting stage
and the pin hole of the upper scroll to limit a relative position
between the upper scroll and the supporting stage.
2. The positioning structure for a compressor as in claim 1,
wherein the pin is inserted into the pin hole of the supporting
stage and the pin hole of the upper scroll to limit a radial degree
of freedom for the upper scroll.
3. The positioning structure for a compressor as in claim 1,
wherein at least part of the casing and the supporting stage is
made by casting such that portion of the casing and the supporting
stage is made by casting.
4. The positioning structure for a compressor as in claim 1,
wherein the casing and the supporting stage are integrally
formed.
5. The positioning structure for a compressor as in claim 1,
wherein the pin comprises a rod-shaped body, a flange at top side
thereof, and a thread at bottom side thereof, the thread passing
through the pin hole of the supporting stage and the pin hole of
the upper scroll such that the pin is retained to the pin hole of
the supporting stage.
6. The positioning structure for a compressor as in claim 5,
wherein the pin passes through the upper scroll and the supporting
stage and selectively fixed to the casing and the supporting
stage.
7. A positioning structure for a compressor, the compressor
comprising a casing for mounting a supporting stage, an upper
scroll, a lower scroll and a transmission shaft, the transmission
shaft pivotally connected to an axial hole of the supporting stage
and an axial hole on bottom of the casing and having one end
connected to a rotation power source and having another end
connected to a bottom of the lower scroll for driving the upper
scroll and the lower scroll to have relative acentric rotation and
generating high-pressure fluid, the positioning structure being
characterized in that the casing comprises a lower shell on bottom
thereof and the lower shell comprises an axial hole, the supporting
stage is fixed to the lower shell of the casing; the supporting
stage comprises at least one pin hole, the lower shell comprises at
least one corresponding pin hole, a pin is inserted into the pin
hole of the supporting stage and the pin hole of the lower shell to
limit a relative position between the axial hole of the supporting
stage, which is pivotally connected to the transmission axis, and
the axial hole of the lower scroll, whereby an axis of the
transmission axis can be positioned.
8. The positioning structure for a compressor as in claim 7,
wherein the pin is inserted into the pin hole of the supporting
stage and the pin hole of the casing to limit a radial degree of
freedom for the supporting stage.
9. The positioning structure for a compressor as in claim 7,
wherein at least part of the casing and the supporting stage is
made by casting such that portion of the casing and the supporting
stage is made by casting.
10. The positioning structure for a compressor as in claim 7,
wherein the casing and the supporting stage are integrally
formed.
11. The positioning structure for a compressor as in claim 7,
wherein the pin comprises a rod-shaped body, a flange at top side
thereof, and a thread at bottom side thereof, the thread passing
through the pin hole of the supporting stage and the pin hole of
the lower scroll such that the pin is retained to the pin hole of
the lower scroll.
12. The positioning structure for a compressor as in claim 11,
wherein the pin passes through the casing, and the supporting stage
and selectively fixed to the casing and the supporting stage.
13. A method for assembling a compressor, the compressor comprising
a casing, a supporting stage in the casing, an upper scroll and a
lower scroll being fixed to the supporting stage to achieve
generation of high-pressure fluid, the method comprising the steps
of: fixing the supporting stage to a predetermined position in the
casing of the compressor and the supporting stage providing a
position reference for successive assembling; inserting one end of
a transmission shaft of the lower scroll to an axial hole of a
lower shell, another end of the transmission shaft passing an axial
hole in the supporting stage such that both ends of the
transmission shaft are retained by the two axial holes; and
inserting at least one pin into corresponding pin hole such that
the upper scroll and the transmission shaft are coaxially
positioned.
14. The method for assembling a compressor as in claim 13, wherein
the step of inserting at least one pin into corresponding pin hole
comprising: aligning a pin hole of the upper scroll to a pin of the
supporting stage, inserting the pin into the pin hole of the upper
scroll to position the upper scroll and the supporting stage.
15. The method for assembling a compressor as in claim 13, wherein
the step of inserting at least one pin into corresponding pin hole
comprising: aligning a pin hole of the casing to a pin of the
supporting stage, inserting the pin into the pin hole of the upper
scroll to position the upper scroll and the supporting stage.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a positioning structure and
a method for assembling compressor, and more particularly to a
positioning structure for achieving the coaxial arrangement of
compressor components and a method for assembling compressor.
[0002] The positioning device and method for assembling a prior art
scroll compressor demand to assemble the elements of the scroll
compressor in coaxial manner. However, in this kind of scroll
compressor, the axis of the upper scroll and the transmission axis
of the lower scroll should be coaxial. Therefore, the inner
diameter of compressor casing, the outer diameters of the upper
scroll and the lower scroll should be matched within certain
tolerance for coaxial positioning. However, this requires precise
size match for those elements. The work area is large and the cost
is increased.
SUMMARY OF THE INVENTION
[0003] The present invention provides a positioning structure for
achieving the coaxial arrangement of compressor components and a
method for assembling the compressor.
[0004] Accordingly, the positioning structure of the present
invention includes a casing, a supporting stage in the casing, an
upper scroll and a lower scroll being fixed to the supporting stage
to achieve generation of high-pressure fluid. A pin is extended
from the supporting stage and a through pin hole is defined in the
upper scroll and corresponding to the pin. The pin hole is engaged
with the pin to assemble the upper scroll to the supporting stage.
An axial hole is defined in the supporting stage and a transmission
shaft on bottom of the lower scroll passes through the axial hole
of he supporting stage and the axial hole of the lower shell for
connecting to a motor. The motor drives the lower scroll to rotate
while the axis of the upper scroll is coaxial with the transmission
shaft of the lower scroll.
BRIEF DESCRIPTION OF DRAWING
[0005] The features of the invention believed to be novel are set
forth with particularity in the appended claims. The invention
itself however may be best understood by reference to the following
detailed description of the invention, which describes certain
exemplary embodiments of the invention, taken in conjunction with
the accompanying drawings in which:
[0006] FIG. 1 shows a sectional view of the positioning structure
of a compressor according to a preferred embodiment of the present
invention.
[0007] FIG. 2 shows a sectional view of the positioning structure
of compressor according to another preferred embodiment of the
present invention.
[0008] FIG. 3 is a sectional view showing the pin used in the
positioning structure of compressor according to the present
invention.
[0009] FIG. 4 shows a flowchart of the assembling method for the
compressor according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0010] FIG. 1 shows a sectional view of the positioning structure
of a compressor according to a preferred embodiment of the present
invention. The scroll compressor 10 comprises a casing 11 with a
supporting stage 13 therein, an upper scroll 15, a lower scroll 17
and a transmission axis 19. The lower scroll 17 is placed on the
supporting stage 13 and the transmission axis 19 is pivotally
connected to the supporting stage 13 with one end connected to a
rotation means. A crank 191 is formed on top of the transmission
axis 19 and pivotally connected to a sleeve on bottom of the lower
scroll 17. The crank 191 drives the lower scroll 17 to have
acentric rotation with the upper scroll 15, thus producing
high-pressure liquid.
[0011] The supporting stage 13 comprises an axial hole 131 and the
casing 11 comprises a lower shell 111 with an axial hole 192. The
supporting stage 13 is retained on the lower shell 111. The
transmission axis 19 is pivotally connected to the axial hole 131
of the supporting stage 13 and the axial hole 192 of the lower
shell 111 to determine a rotation axis thereof. One end of the
transmission axis 19 is connected to a motor 193. The transmission
axis 19 is driven by the motor 193 to rotate the lower scroll 17.
The supporting stage 13 comprises a first pin hole 132 and the
lower shell 111 comprises a second pin hole 112. A pin 20 passes
through the first pin hole 132 and the second pin hole 112 to limit
a related position between the axial hole 13 of the supporting
stage 13 and the motor 193 on one end of the transmission axis 19,
thus positioning the axis of the transmission axis 19.
[0012] The supporting stage 13 comprises at least two first pin
holes 132 and the lower shell 111 comprises corresponding second
pin holes 112. The pins 20 pass through the first pin holes 132 and
the second pin holes 112 to limit three degree of freedom for the
supporting stage 13 and the lower shell 111 on a plane, thus
achieving better precision.
[0013] In above-mentioned assembling structure for the supporting
stage 13 and the lower shell 111, only the first pin holes 132 of
the supporting stage 13 and the second pin holes 112 of the lower
shell and the pins 20 need machining and positioning with high
precision. The supporting stage 13 and the lower shell 111 can be
precisely assembled.
[0014] The upper scroll 15 is assembled in the casing 11 to form a
liquid compression mechanism with the lower scroll 17. The upper
scroll 15 comprises a third pin hole 153 used with a fourth pin
hole 133 of the supporting stage 13. A pin 21 passes through the
third pin hole 153 and the fourth pin hole 133 to limit a coaxial
structure composed of the upper scroll 15 and the supporting stage
13 pivotally connected to the transmission axis 19.
[0015] The upper scroll 15 might comprise at least two third pin
hole 153 and the supporting stage 13 also comprises corresponding
fourth pin holes 133.
[0016] Similarly the upper scroll 15 might comprise at least two
third pin hole 153 and the supporting stage 13 also comprise
corresponding fourth pin holes 133. The corresponding pins 21 pass
through the third pin hole 153 and the fourth pin holes 133 to
limit three degree of freedom for the supporting stage 13 and the
upper scroll 15 on a plane, thus achieving better precision.
[0017] The upper scroll 15 is assembled to the supporting stage 13
by passing the pins 21 through the third pin hole 153 and the
fourth pin holes 133, thus assembling the upper scroll 15 to the
casing 11. The pins 21 only limit the degree of freedom for the
upper scroll 15 on a plane and do not limit the degree of freedom
along a vertical direction.
[0018] In the above-mentioned casing 11 or supporting stage 13, at
least portion thereof is made by casting such that portion of the
casing 11 and the supporting stage 13 is made by casting. Moreover
the casing 11 and the supporting stage 13 can also be integrally
formed by casting.
[0019] FIG. 2 shows a sectional view of the positioning structure
of compressor according to another preferred embodiment of the
present invention.
[0020] With reference to FIG. 2, the positioning structure of
compressor according to the present invention comprises a plurality
of first pin holes 132 on the supporting stage 13, a plurality of
second pin holes 112 on the lower shell 111 and a plurality of
third pin holes 153 on the upper scroll 15. Those pin holes are
corresponding to each other to form a plurality of through holes. A
plurality of pins 22 passes through corresponding through holes
such that the supporting stage 13 and the upper scroll 15 can be
simultaneously assembled with the casing 11 and the upper scroll 15
is coaxial with the transmission axis 19.
[0021] FIG. 3 is a sectional view showing the pin used in the
positioning structure of compressor according to the present
invention.
[0022] With reference to FIG. 3, the pins include pin 20, pin 21
and pin 22. Taking the pin 21 as an example, the pin 21 comprises a
rod-shaped body, flange 21a at top side thereof, and a thread 21b
at bottom side thereof. The supporting stage 13 comprises a thread
hole 134 for engaging the thread 21b such that the pin 21 is
engaged with the thread hole 134 of the fourth pin holes 133, after
passing the third pin holes 153 of the upper scroll 15. Moreover,
the flange 21a provides upper limit for the position of the upper
scroll 15.
[0023] FIG. 4 shows a flowchart of the assembling method for the
compressor according to the present invention. This method is
applied to a scroll compressor 10 and uses assembling structure for
retaining the supporting stage 13 to the upper scroll 15 and the
lower scroll 17 and for assembling the scroll compressor 10. The
method comprises a step 100 for fixing the supporting stage 13 to a
predetermined position of the casing 11 of the scroll compressor
10, which provides a reference for successive steps. In the step
200, the transmission axis 19 of the lower scroll 17 is inserted
into the axial hole 131 of the supporting stage 13 and the axial
hole 192 of the lower shell 111 and connected to a motor 193 for
providing power. Therefore, the transmission axis 19 can be
positioned by the axial hole 131 and the axial hole 192. In the
step 300, corresponding pin 21 is inserted into the third pin holes
153 of the upper scroll 15 and the fourth pin holes 133 of the
supporting stage 13 for clamping. Therefore, the upper scroll 15
and the transmission axis 19 can be clamped by above steps.
[0024] Moreover, the supporting stage 13 can be integrally formed
with the casing 1 to enhance the positioning precision of the
supporting stage 13 and prevent calibration problem after
assembling.
[0025] Although the present invention has been described with
reference to the preferred embodiment thereof, it will be
understood that the invention is not limited to the details
thereof. Various substitutions and modifications have suggested in
the foregoing description, and other will occur to those of
ordinary skill in the art. Therefore, all such substitutions and
modifications are intended to be embraced within the scope of the
invention as defined in the appended claims.
* * * * *