Scroll compressor

Patent metadata

Field	Value
Publication number	US-12281653-B2
Application number	US-202218691383-A
Country	US
Kind code	B2
Filing date	Jul 29, 2022
Priority date	Sep 13, 2021
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

A scroll compressor includes a plurality of fixing protrusions that are provided spaced apart from each other in a key that constitutes an Oldham ring, and an orbiting scroll, to which the key is coupled, or a ring body of the Oldham ring may be provided with a plurality of fixing grooves which are spaced part from each other and into which the plurality of fixing protrusions are respectively inserted and fixed.

First claim

The invention claimed is:

1. A scroll compressor comprising:
an orbiting scroll, as at least one scroll of a plurality of scrolls engaged with each other, coupled to a rotational shaft to perform an orbiting motion; and
an Oldham ring slidably coupled to the orbiting scroll to induce the orbiting motion of the orbiting scroll,
wherein a key groove is formed in one of the orbiting scroll and the Oldham ring, and a key is disposed on another one to be slidably inserted into the key groove,
wherein the key comprises a plurality of fixing protrusions spaced apart from each other,
wherein the orbiting scroll or the Oldham ring comprises a plurality of fixing grooves which are spaced apart from each other and in which the plurality of fixing protrusions are fixedly inserted, and
wherein the plurality of fixing protrusions are connected into an annular shape and the plurality of fixing grooves are connected into an annular shape.

2. The scroll compressor of claim 1 , wherein the Oldham ring comprises a key groove,
wherein the plurality of fixing grooves are formed in one side surface of the orbiting scroll facing the key groove, and
wherein the plurality of fixing grooves are spaced apart from each other in a circumferential or a radial direction, each of the plurality of fixing grooves being in close contact with at least one of an outer or inner surface of a corresponding one of the plurality of fixing protrusions.

3. The scroll compressor of claim 1 , wherein the plurality of fixing protrusions and the plurality of fixing grooves are disposed as pairs and spaced apart from each other along at least one of a circumferential direction and a radial direction.

4. The scroll compressor of claim 1 , wherein the plurality of fixing protrusions extend in an axial direction from both circumferential side surfaces of the key.

5. The scroll compressor of claim 1 , wherein the key comprises:
circumferential side surfaces disposed at a preset interval on both sides in a circumferential direction; and
radial side surfaces disposed at a preset interval on both sides in a radial direction and connecting both the circumferential surfaces to each other, and
wherein a hollow portion is defined between inner surfaces of both the circumferential side surfaces and inner surfaces of both the radial side surfaces, and one end portion of each of the circumferential side surfaces and one end portion of each of the radial side surfaces form the plurality of fixing protrusions.

6. The scroll compressor of claim 5 , wherein the key further comprises an axial side surface connecting both the circumferential side surfaces and both the radial side surfaces.

7. The scroll compressor of claim 6 , wherein the axial side surface has a through hole formed therethrough to have a cross-sectional area smaller than a cross-sectional area of the hollow portion.

8. The scroll compressor of claim 1 , wherein the key comprises:
circumferential side surfaces disposed at a preset interval on both sides in a circumferential direction; and
a hollow portion defined between both the circumferential side surfaces, and
wherein an oil supply groove is formed in an outer surface of at least one of both the circumferential side surfaces or an oil supply hole is formed to penetrate between the outer surface and an inner surface of the at least one circumferential side surface.

9. The scroll compressor of claim 1 , wherein the key comprises:
circumferential side surfaces disposed at a preset interval on both sides in a circumferential direction; and
a hollow portion defined between both the circumferential side surfaces, and
wherein oil supply grooves are formed in circumferential inner surfaces of the key groove facing the circumferential side surfaces.

10. The scroll compressor of claim 1 , wherein the Oldham ring is made of the same material as the orbiting scroll.

11. A scroll compressor comprising:
an orbiting scroll, as at least one scroll of a plurality of scrolls engaged with each other, coupled to a rotational shaft to perform an orbiting motion; and
an Oldham ring slidably coupled to the orbiting scroll to induce the orbiting motion of the orbiting scroll,
wherein a key groove is formed in the orbiting scroll,
wherein the Oldham ring comprises:
a ring body formed in an annular shape; and
a key extending from the ring body and inserted into the key groove,

wherein a liner is inserted into the key groove,
wherein a liner fixing groove is formed in one circumferential side or each of both circumferential sides of the key groove to be spaced apart from the key groove, such that at least a portion thereof overlaps the key groove in a circumferential direction,
wherein a liner fixing jaw is formed between the key groove and the liner fixing groove,
wherein the liner comprises:
a liner body portion inserted into the key groove such that the key is slidably inserted;
a liner extension portion extending in a circumferential direction from the liner body portion; and
a liner fixing portion extending axially from the liner extension portion and inserted into the liner fixing groove, and

wherein the liner body portion and the liner fixing portion overlap a side surface of the liner fixing jaw in the circumferential direction.

12. The scroll compressor of claim 11 , wherein a liner insertion groove is recessed by a preset depth axially into an axial cross-section of the liner fixing groove, such that the liner extension portion is inserted.

13. The scroll compressor of claim 11 , wherein an oil supply groove is further formed in an inner surface of the liner body portion to extend in a radial direction.

14. The scroll compressor of claim 11 , wherein the ring body and the key are made of the same material, and
wherein the liner is made of a different material from the Oldham ring.

Assignees

• Lg Electronics Inc

Inventors

• Yoo Byungkil
• Choi Jungsun
• Choi Seheon

Classifications

• F04C23/008

  Hermetic pumps · CPC title

• F04C2240/802

  Liners · CPC title

• F04C29/023

  Lubricant distribution through a hollow driving shaft (F04C29/025 takes precedence) · CPC title

• F04C29/0071

  Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title