Metal working – Means to assemble or disassemble – With randomly actuated stopping or disabling means
Reexamination Certificate
2001-08-20
2003-09-16
Rosenbaum, I Cuda (Department: 3726)
Metal working
Means to assemble or disassemble
With randomly actuated stopping or disabling means
C029S705000, C029S720000, C029S888022, C029S464000
Reexamination Certificate
active
06618931
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an apparatus for aligning a scroll compressor, and more detailedly a technique configured to be capable of aligning a fixed-scroll and an orbiting-scroll in a short time and with a high precision.
BACKGROUND ART
Japanese Patent Laid-Open No. 62-203901 (prior art 1) discloses a method for aligning a scroll compressor by bringing a fixed-scroll and an orbiting-scroll into mesh with each other for temporal positioning, performing an orbital motion of the orbiting-scroll relative to the fixed-scroll at a temporal position by orbiting-scroll orbiting means, slightly moving the fixed-scroll in X and Y directions by a fixed-scroll movable means, detecting positions on + and − sides at which a scrolled wrap side surface of the orbiting-scroll is in contact with a scrolled-wrap side surface of the fixed-scroll in X and Y directions respectively by orbiting-scroll displacement detecting means, inputting detection date into calculation control means, calculating an intermediate value of contact positions data on each of the + and − sides and positioning the fixed-scroll by correcting positions of the fixed-scroll in the X and Y directions respectively on the basis of a calculation result.
Furthermore, Japanese Patent No. 2811715 (prior art 2) proposes a method for aligning a scroll compressor by bringing a fixed-scroll and an orbiting-scroll into mesh with each other, revolving the orbiting-scroll consecutively at 0°, 90°, 180° and 270° with a bearing of the orbiting-scroll fixed in a condition where an assembling contact surfaces of the fixed-scroll and the orbiting-scroll are in contact with each other, moving the fixed-scroll toward a revolving center until the fixed-scroll comes into contact with the orbiting-scroll at each revolving position of the orbiting-scroll, determining X and Y ordinates when the fixed-scroll comes into contact with the orbiting-scroll, determining a center of an ordinate from X and Y ordinates detected at each revolving position, and adopting the center as a center to position the fixed-scroll and the orbiting-scroll.
However, the above described prior art 1 is configured to align the scroll compressor in the condition where the fixed-scroll is a little raised from the orbiting-scroll, whereby the prior art 1 may allow an error to be involved when the fixed-scroll is lowered and assembled with the orbiting-scroll after alignment.
Furthermore, the prior art 1 requires a time for the alignment since the prior art 1 is configured to perform fine adjustment after the fixed-scroll is slightly moved in the directions of the X axis and the Y axis for the temporal positioning. Furthermore, the prior art 1 may distribute ununiform gaps on left and right sides of wraps since this art does not consider the positioning of the fixed-scroll and the orbiting-scroll relative to each other in a revolving direction.
The above described prior art 2 also requires a time for alignment since the prior art 2 measures coordinate axes with the fixed-scroll and the orbiting-scroll stopped at orbital angle intervals of 90°. Furthermore, the prior art 2 may distribute ununiform gaps on left and right sides of wraps since the prior art 2 does not consider the positioning of the fixed-scroll and the orbiting-scroll relative to each other in a revolving direction like the prior art 1.
SUMMARY OF THE INVENTION
According to the present invention, it is possible to align a scroll compressing section in a short time and with a high precision including positioning of a fixed-scroll and an orbiting-scroll relative to each other in a revolving direction. Accordingly, the present invention have several characteristics which are described below.
First of all, a first invention provides an apparatus for aligning a scroll compressor comprising a fixed-scroll and an orbiting-scroll which are composed of erect spiral scroll-wraps formed on base plates respectively and internally form a compressing chamber by bringing the scroll-wraps into mesh with each other, and a main frame having a driving shaft for the orbiting-scroll: the orbiting-scroll being accommodated in the main frame so as to be capable of performing an orbital motion by way of an oldham coupling, characterized in that apparatus comprises X-Y optionally movable means which is restricted to rotate in a &thgr; direction around a Z axis and supports the fixed-scroll so as to be optionally movable in directions of an X axis and a Y axis, fixed-scroll movable means for moving the fixed-scroll at least in the directions of the X axis and the Y axis by way of the X-Y optionally movable means, orbiting-scroll revolution compensation means which is restricted to rotate the directions of the X axis and the Y axis, and supports the orbiting-scroll in the &thgr; direction around the Z axis by way of the main frame, orbiting-scroll driving means which is coupled with the driving shaft and drives the orbiting-scroll, fixed-scroll displacement detecting means for detecting moving displacements of the fixed-scroll in the directions of the X axis and the Y axis caused due to an orbital motion of the orbiting-scroll and control means which performs predetermined calculations on the basis of a detection signal from the fixed-scroll displacement detecting means, and controls the orbiting-scroll revolution compensation means and the fixed-scroll movable means, and that the above described control means controls orbiting-scroll revolution compensation means so as to minimize a moving displacement of the fixed-scroll with a detection signal obtained from the displacement detecting means when the orbiting-scroll is revolved in the &thgr; direction by the orbiting-scroll revolution compensation means in a condition where the orbiting-scroll is subjected to a continuous orbital motion by the orbiting-scroll driving means, moves the fixed-scroll in the directions of the X axis and the Y axis respectively by the fixed-scroll movable means by way of the X-Y optionally movable means, and determines an intermediate value of a wrap clearance with a detection signal obtainable from the displacement detecting means when the fixed-scroll is pushed back by the orbiting-scroll, thereby compensating a position of the fixed-scroll.
The apparatus according to the present invention is capable of managing both alignment in directions of the X axis and the Y axis (an XY compensation) and alignment of the orbiting-scroll and the fixed-scroll relative to each other in a revolving direction (a revolution compensation) at the same time and with a high precision.
When the apparatus according to the present invention further comprises fixed-scroll raising-lowering means for moving the fixed-scroll in the direction of the Z axis, the apparatus is capable of compensating a load of the fixed-scroll on the orbiting-scroll at an assembling time of a scroll compressor in addition to the XY compensation and revolution compensation.
In a preferable aspect of the present invention, the X-Y optionally movable means comprises a first support plate disposed on a side of the fixed-scroll movable means, a second support plate for supporting the fixed-scroll and an intermediate plate disposed between the first and second support plates, the first support plate is coupled with the intermediate plate using a pair of first leaf springs which are elastically deformable only in either direction of the X axis or the Y axis and arranged in parallel with each other, and the second support plate is coupled with the intermediate plate using a pair of second leaf springs which are elastically deformable only in other direction of the X axis or the Y axis and arranged in parallel with each other.
The apparatus having this configuration is capable of optionally moving the fixed-scroll in the directions' of the X axis and the Y axis while restricting the fixed-scroll to revolve in the &thgr; direction, and pushing back the fixed-scroll to an initial condition even when the fixed-scroll is moved.
In another aspect of the present invention,
Araki Makoto
Shimura Kenji
Takeda Shuji
Cuda Rosenbaum I
Fujitsu General Limited
Kanesaka & Takeuchi
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