FR2583122A3 - Set of connecting rods for small single-cylinder machines with reciprocating movement, especially for refrigerator compressors - Google Patents

Set of connecting rods for small single-cylinder machines with reciprocating movement, especially for refrigerator compressors Download PDF

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Publication number
FR2583122A3
FR2583122A3 FR8607968A FR8607968A FR2583122A3 FR 2583122 A3 FR2583122 A3 FR 2583122A3 FR 8607968 A FR8607968 A FR 8607968A FR 8607968 A FR8607968 A FR 8607968A FR 2583122 A3 FR2583122 A3 FR 2583122A3
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FR
France
Prior art keywords
connecting rod
sleeve
fork
assembly according
rod assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8607968A
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French (fr)
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FR2583122B3 (en
Inventor
Vittorio Bianchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2583122A3 publication Critical patent/FR2583122A3/en
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Publication of FR2583122B3 publication Critical patent/FR2583122B3/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/02—Sliding-contact bearings
    • F16C23/04—Sliding-contact bearings self-adjusting
    • F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
    • F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/01—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with one single cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04—Connecting-rod bearings; Attachments thereof

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

Set of connecting rods for small single-cylinder machines with reciprocating movement, especially for household refrigerator compressors, equipped with a sleeve mounted on a crank pin and retained by a forked end of a connecting rod. The set of connecting rods is characterised in that the inner face 18 of the fork 16 belongs at least partially to a spherical surface and in that the outer face 14 of the sleeve 13 is at least partially conjugate with the said face.

Description

Ensemble de bielle pour de petites machines monocylindriques à mouvement de va-et-vient notamment pour des compresseurs de réfrigérateurs."
L'invention concerne un ensemble de bielle pour de petites machines monocylindriques à mouvement de va-et-vient, notamment pour des compresseurs de réfrigérateurs ménagers.Connecting rod assembly for small single-cylinder machines with reciprocating motion, in particular for compressor compressors. "
The invention relates to a connecting rod assembly for small single-cylinder machines with reciprocating motion, in particular for compressors of household refrigerators.

Dans des compresseurs de réfrigérateurs, un moteur électrique commande une manivelle dont le maneton est disposé dans la tête d'une bielle. Le pied de bielle peut pivoter autour d'un axe réuni au piston qui peut être déplacé dans un cylindre. Le maneton est vertical et est situé en haut, c'est-àdire au-dessus du moteur, tandis que le piston est horizontal. In refrigerator compressors, an electric motor drives a crank, the crank pin of which is placed in the head of a connecting rod. The big end can pivot around an axis joined to the piston which can be moved in a cylinder. The crankpin is vertical and is located at the top, i.e. above the engine, while the piston is horizontal.

Dans des compresseurs de ce genre, il faut respecter des tolérances de fabrication rigoureuses relatives au positionnement du maneton par rapport à l'axe du piston (ou plutôt du cylindre dans lequel il est placé). Ces exigences relatives à la précision affectent le coût de fabrication. Pour réduire ces exigences et le coût ainsi provoqué, on a déjà proposé (voir le brevet américain NO 4.407.168) de monter le maneton dans un manchon muni de deux tiges faisant saillie diamétralement et logées dans des sièges prévus aux extrémités des branches de l'extrémité fourchue de la bielle. Un ressort à boudin profilé maintient le manchon dans la bielle.De cette façon, on obtient une liaison entre le maneton et la bielle qui ne permet guwun seul degré de liberté, crest-à-dire de petits mouvements angulaires autour de l'axe diamétral des tiges. Bien que ce procédé connu constitue une amélioration par rapport à des procédés antérieurs, il n'est pas entièrement satisfaisant du fait que, d'une part, il est relativement compliqué et que, d'autre part, un seul degré de liberté ne permet pas une compensation adéquate des imprécisions de fabrication. In compressors of this type, strict manufacturing tolerances must be observed relating to the positioning of the crankpin relative to the axis of the piston (or rather of the cylinder in which it is placed). These accuracy requirements affect the cost of manufacturing. To reduce these requirements and the cost thus caused, it has already been proposed (see US Patent No. 4,407,168) to mount the crankpin in a sleeve provided with two rods projecting diametrically and housed in seats provided at the ends of the branches of the forked end of the connecting rod. A profiled coil spring holds the sleeve in the connecting rod. In this way, a connection is obtained between the crank pin and the connecting rod which does not allow a single degree of freedom, ie small angular movements around the diametric axis. stems. Although this known method constitutes an improvement over previous methods, it is not entirely satisfactory because, on the one hand, it is relatively complicated and, on the other hand, a single degree of freedom does not allow not adequate compensation for manufacturing inaccuracies.

L'invention vise à fournir un ensemble de bielle économique permettant de compenser de façon adéquate des imprécisions de fabrication ou, en d'autres termes, d'utiliser des tolérances de fabrication moins étroites. The invention aims to provide an economical connecting rod assembly making it possible to adequately compensate for manufacturing inaccuracies or, in other words, to use narrower manufacturing tolerances.

Ce but et d'autres buts apparaissant dans la description détaillée ci-après sont atteints par un ensemble de bielle caractérisé essentielleaent en ce qu'au ovins à l'une de ses extrémités, la bielle se termine en fourchette, la face intérieure de ladite fourchette appartenant au soins partieflement à une surface sphérique, fourchette avec laquelle coopère un manchon ayant son contour au moins partiellement conjugué avec celui de la face intérieure de la fourchette, alors qu'il est prévu des moyens pour retenir ledit manchon dans la bielle. This object and other objects appearing in the detailed description below are achieved by a rod assembly characterized essentially in that in sheep at one of its ends, the rod ends in a fork, the inner face of said fork belonging to partflement care with a spherical surface, fork with which a sleeve cooperates having its outline at least partially conjugated with that of the inner face of the fork, while means are provided for retaining said sleeve in the connecting rod.

Avantageusement, lesdits moyens sont constitués par un ressort plat qui entoure partiellement le manchon et dont les extrémités sont engagées dans des sièges prévus dans la bielle. Advantageously, said means consist of a flat spring which partially surrounds the sleeve and the ends of which are engaged in seats provided in the connecting rod.

La description suivante, en regard du dessin annexé, le tout donné à titre d'exemple, permettra de mieux comprendre convent l'invention est réalisée. The following description, with reference to the appended drawing, all given by way of example, will allow a better understanding of the invention is achieved.

La figure i est une coupe verticale d'un compresseur à mouvement de va-et-vient pour des circuits de réfrigération. Figure i is a vertical section of a reciprocating compressor for refrigeration circuits.

La figure 2 est une vue éclatée en perspective du mécanisme à manivelle du compresseur de la figure 1,
La figure 3 est une vue en plan d'une partie du mécanisme à manivelle de la figure 2.FIG. 2 is an exploded perspective view of the crank mechanism of the compressor of FIG. 1,
FIG. 3 is a plan view of part of the crank mechanism of FIG. 2.

La figure 4 illustre schématiquement une autre tête de bielle. Figure 4 schematically illustrates another connecting rod head.

En référence aux figures, le compresseur 1 est de type étanche monocylindrique à mouvement de va-et-vient et est utilisé dans des réfrigérateurs ménagers. il comporte une enveloppe étanche 2, un moteur électrique 3 muni d'un stator 4, d'un rotor 5 et d'un arbre 6, et une carcasse 7 munie d'un manchon a pour l'arbre 6 et d'un cylindre 9 dans lequel peut coulisser le piston 10. With reference to the figures, the compressor 1 is of the sealed single-cylinder type with reciprocating movement and is used in household refrigerators. it comprises a sealed casing 2, an electric motor 3 provided with a stator 4, a rotor 5 and a shaft 6, and a carcass 7 provided with a sleeve a for the shaft 6 and a cylinder 9 in which the piston 10 can slide.

A l'autre extrémité de l'arbre, il est prévu un maneton conventionnel 11, excentrique par rapport à l'axe de l'arbre 6, et une nasse d'équilibrage 12. At the other end of the shaft, a conventional pin 11 is provided, eccentric with respect to the axis of the shaft 6, and a balancing basket 12.

Sur le maneton 11, est monté un manchon 13 dont la face extersevre 14 apydrtient à une surface sphérique, à l'exception de la partie annulaire intermédiaire 15 qui, au contraire, appartient à une surface cylindrique. Le manchon 13 est disposé entre les branches d'une fourchette 16 prévue à l'une des extrémités de la bielle 17. La face intérieure 18 de la fourchette 16 appartient à une surface sphérique conjuguée avec celle du manchon 13. Les branches de la fourchette 16 (voir figure 3) font un angle légèrement supérieur à 1800.Dans ses deux parties terminales, dans lesquelles l'ouverture d'angle a est supérieure à 1800, la face intérieure 18 de la fourchette 16 appartient à une surface cylindrique de diamètre égal au diamètre de la surface sphérique, du manchon 13'pour permettre d'introduire le manchon 13 dans la fourchette 16. On the crank pin 11, a sleeve 13 is mounted, the outer face 14 of which hydrates at a spherical surface, with the exception of the intermediate annular part 15 which, on the contrary, belongs to a cylindrical surface. The sleeve 13 is disposed between the arms of a fork 16 provided at one end of the connecting rod 17. The inner face 18 of the fork 16 belongs to a spherical surface combined with that of the sleeve 13. The arms of the fork 16 (see Figure 3) make an angle slightly greater than 1800. In its two end parts, in which the angle opening a is greater than 1800, the inner face 18 of the fork 16 belongs to a cylindrical surface of equal diameter to the diameter of the spherical surface, of the sleeve 13 ′ to allow the sleeve 13 to be introduced into the fork 16.

Le manchon 13 est retenu dans la bielle 17 par un ressort plat 19 de forme sensiblement fourchue, ses extrémités 20, de hauteur plus faible, étant pliées vers l'intérieur. Ce ressort comporte notamment une partie intermédiaire 21 qui s'adapte à la surface cylindrique 15 du manchon 13 en faisant un certain angle avec celle-ci et qui a sensiblement la même hauteur que cette surface cylindrique. La partie 21 est successivement suivie d'un gradin 22 et d'une branche divergente 23 dont la hauteur diminue à proximité des extrémités 20 pliées vers l'intérieur. Ces extrémités pénètrent dans des évidements 24 pratiqués dans les branches de la fourchette 16 de façon à maintenir le manchon 13 engagé dans la bielle 17. The sleeve 13 is retained in the connecting rod 17 by a flat spring 19 of substantially forked shape, its ends 20, of smaller height, being bent inwards. This spring includes in particular an intermediate part 21 which adapts to the cylindrical surface 15 of the sleeve 13 at an angle with it and which has substantially the same height as this cylindrical surface. The part 21 is successively followed by a step 22 and a divergent branch 23 whose height decreases near the ends 20 folded inwards. These ends penetrate into recesses 24 made in the branches of the fork 16 so as to keep the sleeve 13 engaged in the connecting rod 17.

L'autre extrémité de la bielle 17 forme le pied de bielle 30 qui peut être constitué par un oeil (tel que représenté) ou une fourchette analogue à la fourchette 16 et présentant donc deux évidements 24 et une face intérieure sphérique 18. Un axe 31 réunit la bielle 17 au piston 10. Si le pied de bielle a la forme d'un oeil 30, cet axe est introduit dans l'oeil lui-même, tandis que dans le cas où il a la forme d'une fourchette analogue à la fourchette 16, l'axe 31 est introduit dans un manchon analogue au manchon 13 et retenu dans la fourchette par un ressort analogue au ressort 19. The other end of the connecting rod 17 forms the connecting rod foot 30 which may be constituted by an eye (as shown) or a fork similar to the fork 16 and therefore having two recesses 24 and a spherical inner face 18. An axis 31 joins the connecting rod 17 to the piston 10. If the connecting rod has the shape of an eye 30, this axis is introduced into the eye itself, while in the case where it has the shape of a fork analogous to the fork 16, the pin 31 is introduced into a sleeve similar to the sleeve 13 and retained in the fork by a spring similar to the spring 19.

Dans le mode de réalisation de la figure 4, il est à nouveau prévu un manchon 13 monté sur un maneton 111 et ayant la même forme que le manchon 13. Le manchon est retenu dans la fourchette 16' de la bielle 17' au moyen d'un segment d'anneau 40 (dont la face intérieure appartient à une surface sphérique) et d'une paire de ressorts fourchus 41 dont les extrémités pliées sont disposées dans des sièges 42 prévus dans le segment 40 aussi bien que dans la fourchette 16'.  In the embodiment of Figure 4, there is again provided a sleeve 13 mounted on a pin 111 and having the same shape as the sleeve 13. The sleeve is retained in the fork 16 'of the rod 17' by means of 'a ring segment 40 (the inner face of which belongs to a spherical surface) and of a pair of forked springs 41 whose folded ends are arranged in seats 42 provided in segment 40 as well as in fork 16' .

Claims (7)

REVENDICATIONS:CLAIMS: 1. Ensemble de bielle pour de petites machines monocylindriques à mouvement de va-et-vient, notamment pour des compresseurs de réfrigérateurs ménagers, muni dtun fanchon monté sur un maneton et retenu par une extrémité fourchue d'une bielle, caractérisé en ce que la face intérieure (18) de la fourchette (16) appartient au moins partiellement à une surface sphérique et en ce que la face extérieure (14) du manchon (13) est au moins partiellement conjuguée avec ladite face.1. Connecting rod assembly for small single-cylinder machines with reciprocating movement, in particular for compressors of household refrigerators, provided with a plug mounted on a crank pin and retained by a forked end of a connecting rod, characterized in that the inner face (18) of the fork (16) belongs at least partially to a spherical surface and in that the outer face (14) of the sleeve (13) is at least partially conjugated with said face. 2. Ensemble de bielle selon la revendication 1, caractérisé en ce que, pour retenir le manchon 113) dans la fourchette (17), il est prévu un ressort plat profilé 118} qui entoure partiellement le manchon (13) et dont les extrémités (20) sont accrochées à la bielle (17).2. Connecting rod assembly according to claim 1, characterized in that, to retain the sleeve 113) in the fork (17), there is provided a profiled flat spring 118} which partially surrounds the sleeve (13) and the ends of which ( 20) are attached to the connecting rod (17). 3. Ensemble de bielle selon la revendication 1, caractérisé en ce que le ressort plat (19) a sensiblement une forme fourchue et en ce que ses extrémités (20) ont une section transversale plus faible que le reste du ressort.3. Connecting rod assembly according to claim 1, characterized in that the flat spring (19) has substantially a forked shape and in that its ends (20) have a smaller cross section than the rest of the spring. 4. Ensemble de bielle selon la revendication 1, caractérisé en ce que la face extérieure du manchon (13) présente une surface cylindrique (15) s'étendant au niveau de la moitié de sa hauteur.4. Connecting rod assembly according to claim 1, characterized in that the outer face of the sleeve (13) has a cylindrical surface (15) extending at the level of half its height. 5. Ensemble de bielle selon la revendication 2, caractérisé en ce que les extrémités (20) du ressort plat (19) sont accrochées à des évidements (24) pratiqués dans la bielle (17). 5. Connecting rod assembly according to claim 2, characterized in that the ends (20) of the flat spring (19) are hooked to recesses (24) formed in the connecting rod (17). 6. Ensemble de bielle selon la revendication 1, caractérisé en ce que, pour retenir le manchon dans la bielle, il est prévu un segment d'anneau (40) qui s'adapte partiellement au contour du manchon (13'), et deux moyens élastiques (41) servant à accrocher ledit segment (40) à la bielle (17(). 6. Connecting rod assembly according to claim 1, characterized in that, to retain the sleeve in the connecting rod, there is provided a ring segment (40) which partially adapts to the contour of the sleeve (13 '), and two elastic means (41) serving to hook said segment (40) to the connecting rod (17 (). 7. Ensemble de bielle selon l'une quelconque des revendications précédentes, caractérisé en ce que la bielle se termine en fourchette à ses deux extrémités et en ce qu'un manchon est placé dans chacune de ces extrémités. 7. Connecting rod assembly according to any one of the preceding claims, characterized in that the connecting rod ends in a fork at its two ends and in that a sleeve is placed in each of these ends.
FR8607968A 1985-06-07 1986-06-03 CONNECTING ROD ASSEMBLY FOR SMALL SINGLE-CYLINDRICAL MACHINES WITH BACK-AND-MOTION MOTION, ESPECIALLY FOR REFRIGERATOR COMPRESSORS Expired FR2583122B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2211785U IT8522117V0 (en) 1985-06-07 1985-06-07 BEAUTY FOR SMALL SINGLE CYLINDER ALTERNATIVE MACHINES, ESPECIALLY FOR COMPRESSORS FOR REFRIGERATORS.

Publications (2)

Publication Number Publication Date
FR2583122A3 true FR2583122A3 (en) 1986-12-12
FR2583122B3 FR2583122B3 (en) 1987-07-31

Family

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Application Number Title Priority Date Filing Date
FR8607968A Expired FR2583122B3 (en) 1985-06-07 1986-06-03 CONNECTING ROD ASSEMBLY FOR SMALL SINGLE-CYLINDRICAL MACHINES WITH BACK-AND-MOTION MOTION, ESPECIALLY FOR REFRIGERATOR COMPRESSORS

Country Status (4)

Country Link
DE (1) DE8613993U1 (en)
ES (1) ES294559Y (en)
FR (1) FR2583122B3 (en)
IT (1) IT8522117V0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0787910A1 (en) * 1996-02-02 1997-08-06 EMBRACO EUROPE S.r.l. A connecting rod for small reciprocating maschines such as refrigerator compressors, and reciprocating machines incorporating such connecting rods

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3801802A1 (en) * 1988-01-22 1989-08-03 Danfoss As CONNECTING ROD FOR AN AXIAL PISTON COMPRESSOR
CH684416A5 (en) * 1990-11-29 1994-09-15 Mefina Sa An articulation between two levers.
IT1245062B (en) * 1991-04-12 1994-09-13 Aspera Srl CONNECTING ROD FOR SMALL ALTERNATIVE MACHINES, IN PARTICULAR FOR COMPRESSORS FOR REFRIGERATORS
BR9304034A (en) * 1993-10-19 1995-06-20 Brasil Compressores Sa Two-way connecting rod for hermetic reciprocating compressor
FR2731054B1 (en) * 1995-02-28 1997-04-18 Peugeot CONNECTING ROD PARTICULARLY FOR A HEAT ENGINE AND A MOTOR VEHICLE EQUIPPED WITH SUCH CONNECTING ROD
DE10356397B3 (en) * 2003-12-03 2005-08-11 Danfoss Compressors Gmbh piston compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0787910A1 (en) * 1996-02-02 1997-08-06 EMBRACO EUROPE S.r.l. A connecting rod for small reciprocating maschines such as refrigerator compressors, and reciprocating machines incorporating such connecting rods
US5799565A (en) * 1996-02-02 1998-09-01 Embraco Europe S.R.L. Connecting rod for small reciprocating machines such as refrigerator compressors, and reciprocating machines incorporating such connecting rods

Also Published As

Publication number Publication date
DE8613993U1 (en) 1986-10-02
FR2583122B3 (en) 1987-07-31
ES294559U (en) 1987-03-16
IT8522117V0 (en) 1985-06-07
ES294559Y (en) 1987-11-01

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