Arrangement and process for mounting a resonant spring in a refrigeration compressor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-017/03
F04B-035/04
B21D-053/06
B21K-021/00
F01B-031/00
출원번호
US-0809121
(2008-12-08)
등록번호
US-8360749
(2013-01-29)
우선권정보
BR-0705541 (2007-12-18)
국제출원번호
PCT/BR2008/000364
(2008-12-08)
§371/§102 date
20100824
(20100824)
국제공개번호
WO2009/076734
(2009-06-25)
발명자
/ 주소
Morrone, Rogerio Ribeiro
출원인 / 주소
Whirlpool S.A.
인용정보
피인용 횟수 :
4인용 특허 :
2
초록▼
The arrangement and the process are applied in a compressor comprising: a cylinder block (2); a movable assembly including a piston (5); and a resonant spring (11) having a first end portion (11a), affixed to the cylinder block (2) by a first fixation assembly (20), and a second end portion (11b) af
The arrangement and the process are applied in a compressor comprising: a cylinder block (2); a movable assembly including a piston (5); and a resonant spring (11) having a first end portion (11a), affixed to the cylinder block (2) by a first fixation assembly (20), and a second end portion (11b) affixed to the movable assembly by a second fixation assembly (30). The first or the second fixation assembly (20, 30) comprises a bearing portion (21, 31) attached around one of the end portions (11a, 11b) of the resonant spring (11) and having a fixation face (21b, 31b), and a bearing receiving portion (22, 32), previously attached to the cylinder block (2) or to the movable assembly and having a junction face (22b, 32b), the fixation and junction faces (21b, 31b, 22b, 32b) being welded together, securing the resonant spring (11) to the movable assembly and to the cylinder block (2), maintaining the movable assembly concentric to the cylinder (2a) and in a predetermined axial positioning.
대표청구항▼
1. An arrangement for mounting a resonant spring in a refrigeration compressor of a type which comprises, in an interior of a shell (1): a cylinder block (2) defining a cylinder (2a); a movable assembly formed by a piston (5) reciprocating in an interior of the cylinder (2a), an actuating means (7),
1. An arrangement for mounting a resonant spring in a refrigeration compressor of a type which comprises, in an interior of a shell (1): a cylinder block (2) defining a cylinder (2a); a movable assembly formed by a piston (5) reciprocating in an interior of the cylinder (2a), an actuating means (7), for driving the piston (5), and a driving rod (9) coupling the piston (5) to the actuating means (7); and a resonant spring (11) having a first end portion (11a) affixed to the cylinder block (2) by a first fixation means (20), and a second end portion (11b) affixed to the movable assembly by a second fixation means (30), wherein at least one of the first and second fixation means (20, 30) comprises a bearing portion (21, 31) which is attached, at a first side (21a, 31a), around one of the end portions (11a, 11b) of the resonant spring (11) and having, at an opposite side, a fixation face (21b, 31b), and a bearing receiving portion (22, 32) which is attached, at one side, to one of the cylinder block and the movable assembly and having, at an opposite side, a junction face (22b, 32b), said fixation and junction faces (21a, 31a, 22b, 32b) of the bearing portion (21, 31) and bearing receiving portion (22, 32) of said fixation means (20, 30) being seated and welded to each other, in order to secure a respective end portion (11a, 11b) of the resonant spring (11) to the one of the movable assembly and the cylinder block (2), maintaining said movable assembly concentric to the cylinder (2a) and in a predetermined axial positioning. 2. The arrangement, as set forth in claim 1, wherein at least one of the parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32) are molded directly onto a respective part of one of the end portions (11a, 11b) of the resonant spring (11), of the cylinder block (2) and of the movable assembly. 3. The arrangement, as set forth in claim 2, wherein each bearing portion (21, 31) and bearing receiving portion (22, 32) is over-injected on a respective part to which it is provided. 4. The arrangement, as set forth in claim 2, wherein each end portion (11a, 11b) of the resonant spring (11) is disposed according to a direction orthogonal to an axis of said resonant spring (11). 5. The arrangement, as set forth in claim 2, wherein each end portion (11a, 11b) of the resonant spring (11) defines a circular section shaft portion tightly housed in the interior of a respective bearing portion (21, 31) of one of the first and second fixation means (20, 30). 6. The arrangement, as set forth in claim 1, wherein the fixation face (21b, 31b) and junction face (22b, 32b) of the bearing portion (21, 31) and bearing receiving portion (22, 32) of said fixation means (20, 30) are fusion welded to each other. 7. The arrangement, as set forth in claim 6, wherein the fixation face (21b, 31b) and junction face (22b, 32b) of the bearing portion (21, 31) and bearing receiving portion (22, 32) of said fixation means (20, 30) are deformed by mutual compression during fusion welding. 8. The arrangement, as set forth in claim 6, wherein parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32) are fusion welded to each other around a fixation element (50) made of a material with a fusion point higher than that of said parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32). 9. The arrangement, as set forth in claim 8, wherein the fixation element (50) is a pin axially housed in recesses (31c, 32c) defined in each one of the fixation face (31b) and junction face (32b) of the parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32). 10. The arrangement, as set forth in claim 9, wherein the fixation element (50) is a metallic pin. 11. The arrangement, as set forth in claim 9, wherein the pin is provided with superficial grooves. 12. The arrangement, as set forth in claim 1, wherein the parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32) are made of a same material. 13. The arrangement, as set forth in claim 12, wherein the parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32) are made of plastic material. 14. The arrangement, as set forth in claim 1, wherein the bearing receiving portion (32) of the second fixation means (30) is molded, in a single piece, around the driving rod (9). 15. A process for mounting a resonant spring in a refrigeration compressor of a type which comprises, in an interior of a shell (1): a cylinder block (2) defining a cylinder (2a); a movable assembly formed by a piston (5) reciprocating in an interior of the cylinder (2a), by an actuating means (7) for driving the piston (5), and by a driving rod (9) coupling the piston (5) to the actuating means (7); and a resonant spring (11) having a first end portion (11a) affixed to the cylinder block (2) by a first fixation means (20), and a second end portion (11b) affixed to the movable assembly by a second fixation means (30), it comprising the steps of: affixing a bearing portion (21, 31) of one of the first and second fixation means (20, 30) around one of the end portions (11a, 11b) of the resonant spring (11), said bearing portion (21, 31) having a fixation side (21a, 31a) and an opposite side with a fixation face (21b, 31b);affixing a first side (21a, 31a) of a corresponding bearing receiving portion (22, 32) to one of the cylinder block (2) and the movable assembly, said bearing receiving portion (22, 32) having a junction face (22b, 32b) opposite to the first side; andmutually seating and welding the fixation and junction faces (21b, 31b, 22b, 32b), so as to affix a respective end portion (11a, 11b) of the resonant spring (11) to the one of the movable assembly and the cylinder block (2), maintaining said movable assembly concentric to the cylinder (2a) and in a predetermined axial positioning. 16. The process, as set forth in claim 15, wherein the bearing portion (21, 31) is molded around an adjacent end portion (11a, 11b) of the resonant spring. 17. The process, as set forth in claim 16, wherein the bearing portion (21, 31) and bearing receiving portion (22, 32) are over-injected on a respective part to which it is provided. 18. The process, as set forth in claim 15, wherein it comprises the additional steps of: heating at least one of the parts of the fixation face (21b, 31b) and the junction face (22b, 32b) of the bearing portion (21, 31) and of one bearing receiving portion (22, 32) to be attached to each other;positioning said parts to each other, so as to obtain a coaxial positioning of the movable assembly in relation to the cylinder (2a);mutually seating said parts;compressing said parts of the fixation face (21b, 31b) and the junction face (22b, 32b), until obtaining a determined surface fusion thereof, corresponding to the predetermined axial positioning. 19. The process, as set forth in claim 18, wherein it comprises the additional steps of: providing a heat source (40) between the bearing portion (21, 31) and respective bearing receiving portion (22, 32), prior to the heating of the respective fixation face (21b, 31b) and junction face (22b, 32b);heating said fixation and junction faces (21b, 31b, 22b, 32b) until obtaining the fusion thereof, before their mutual seating. 20. The process, as set forth in claim 15, wherein it includes the additional steps of: providing a fixation element (50) between parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32);positioning said parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32) to obtain a coaxial positioning of the movable assembly in relation to the cylinder (2a);conducting said parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32) to the mutual seating; andheating said fixation and junction faces (31b, 32b), until obtaining a fusion thereof around the fixation element (50) and to each other, so as to obtain the predetermined axial positioning between said parts. 21. The process, as set forth in claim 20, wherein the fixation element (50) is made of a material having a high thermal conductibility and having a fusion point superior to that of the parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32), said parts of the bearing portion (21, 31) and the bearing receiving portion (22, 32) being welded to each other by heat emanated from said fixation element (50), which is in turn heated by induction.
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