Scroll type compressor comprising an Oldham ring having a reinforced pawls and a mirror plate having a concave recess for a movable scroll

• US 8,303,280 B2
• Filed: 02/19/2010
• Issued: 11/06/2012
• Est. Priority Date: 02/20/2009
• Status: Expired due to Fees

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Kiyokawa, Yasunori, Koike, Yoshiaki, Sugimoto, Kazuyoshi
• Primary Examiner(s): Trieu, Theresa
• Application Number:
  US12/709,089
• Publication Number:
  US 20100215536A1
• Time in Patent Office: 991 Days
• Field of Search: 418 551- 556, 418/57, 464102-104
• US Class Current: 418/55.3
• CPC Class Codes: F01C 17/066 with an intermediate piece sliding along perpendicular axes, e.g. Oldham coupling
• CPC Class Codes: F04C 18/0253 Details concerning the base
• CPC Class Codes: F04C 23/008 Hermetic pumps

Abstract

In a scroll type compressor including a fixed scroll having a mirror plate and a lap provided to the mirror plate, a movable scroll having a mirror plate and a lap provided to the mirror plate and engaged with the fixed scroll, and an Oldham'"'"'s ring disposed on the back side of the movable scroll for constraining rotation of the movable scroll on the axis thereof, the Oldham'"'"'s ring has a pair of fixing locking pawls extending from the back side of the movable scroll and fitted to the fixed scroll, each of the fixing locking pawls is provided with a reinforcing portion at the base portion thereof, and the mirror plate of the movable scroll is cut out in a concave shape at the edge portion thereof in conformity with a movement range of the reinforcing portion to form a concaved escape portion at the edge portion of the mirror plate.

Claims

1. A scroll type compressor comprising:

a fixed scroll;

a movable scroll having a mirror plate and a lap that is provided to the mirror plate and engaged with the fixed scroll; and

an Oldham'"'"'s ring that is disposed on a back side of the movable scroll and constrains rotation of the movable scroll on an axis thereof, wherein;

the Oldham'"'"'s ring has a pair of fixing locking pawls extending toward the fixed scroll and configured to fix the movable scroll from a back side of the movable scroll by being fitted to the fixed scroll, and a pair of projecting portions for constraining the rotation of the movable scroll,

each of the fixing locking pawls is provided with a reinforcing portion at a base portion thereof,

the mirror plate of the movable scroll is cut out in a concave shape at an edge portion thereof in conformity with a movement range of the reinforcing portion to form a air of concaved escape portions at the edge portion of the mirror plate,

the mirror plate is provided with a pair of guide grooves to which the pair of projecting portions are respectively fitted, and

the pair of concaved escape portions and the pair of guide grooves are provided so that three points displaced in phase by 120°

are all disposed on the edge portion of the mirror plate except for the pair of concaved escape portions and the pair of guide grooves.

2. The scroll type compressor according to claim 1, wherein both side surfaces of each of the pair of concaved escape portions are shaped so as to be fitted to the reinforcing portion.

3. The scroll type compressor according to claim 1, wherein the reinforcing portion is larger in width than the fixing locking pawl in a predetermined direction.

4. The scroll type compressor according to claim 1, wherein:

the pair of concave escape portions are displaced in phase by 180° and

the pair of projecting portions are displaced in phase by 180°

, and

the pair of concave escape portions and the pair of projecting portions are displaced in phase by 90°

.

5. A scroll type compressor comprising:

a fixed scroll;

a movable scroll including a mirror plate; and

an Oldham'"'"'s ring for constraining rotation of the movable scroll on an axis thereof and for fixing the movable scroll to the fixed scroll, wherein;

the Oldham'"'"'s ring has a pair of fixing locking pawls extending toward the fixed scroll and configured to fix the movable scroll from a back side of the movable scroll by being fitted to the fixed scroll, and a pair of projecting portions for constraining the rotation of the movable scroll,

the mirror plate of the movable scroll is cut out in a concave shape at an edge portion thereof in conformity with a movement range of the pair of fixing locking pawls to form a pair of concaved escape portions at the edge portion of the mirror plate,

the mirror plate is provided with a pair of guide grooves to which the pair of projecting portions are respectively fitted, and

the pair of concaved escape portions and the pair of guide grooves are provided so that three points displaced in phase by 120°

are all disposed on the edge portion of the mirror plate except for the pair of concaved escape portions and the pair of guide grooves.