FR2755739A1 - Unit for sealing and preventing the unscrewing of piston screwed onto a rod - Google Patents

Unit for sealing and preventing the unscrewing of piston screwed onto a rod Download PDF

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Publication number
FR2755739A1
FR2755739A1 FR9614035A FR9614035A FR2755739A1 FR 2755739 A1 FR2755739 A1 FR 2755739A1 FR 9614035 A FR9614035 A FR 9614035A FR 9614035 A FR9614035 A FR 9614035A FR 2755739 A1 FR2755739 A1 FR 2755739A1
Authority
FR
France
Prior art keywords
rod
piston
screwed onto
preventing
ring
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
FR9614035A
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French (fr)
Other versions
FR2755739B1 (en
Inventor
Andre Chapel
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Individual
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Individual
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 Individual filed Critical Individual
Priority to FR9614035A priority Critical patent/FR2755739B1/en
Publication of FR2755739A1 publication Critical patent/FR2755739A1/en
Application granted granted Critical
Publication of FR2755739B1 publication Critical patent/FR2755739B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/12—Connection to driving members with piston-rods, e.g. rigid connections
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/225—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of a settable material

Abstract

The unit is for sealing and preventing the unscrewing of a piston (1) screwed onto a rod (3) of a hydraulic jack. It consists of a ring (2) threaded onto the end (31) of the rod (3) which is compressed by the piston (1), screwed onto the end (31) of the rod, against the shoulder (33) of the rod (3). This causes a deformation of the ring (2) and its penetration between the shoulders of the thread (32). This has an effect in one part of preventing the passage of the fluid between the chambers (A and B), and in the other part, due to the radial load engendered between the shoulders of the thread (32) and the cut-out (11) of the piston, of strongly preventing the latter of any ill-timed release.

Description

DESCRIPTION
La présente invention concerne un dispositif pour étancher et freiner au desserrage, à l'aide d'une seule pièce, le piston vissé sur la tige d'un vérin hydraulique ou de tout autre assemblage nécessitant les mêmes besoins.DESCRIPTION
The present invention relates to a device for sealing and braking on loosening, using a single piece, the piston screwed onto the rod of a hydraulic cylinder or any other assembly requiring the same needs.

Traditionnellement l'étanchéité entre les deux chambres A et B, est effectuée par un joint torique et le freinage au desserrage par un contre écrou, des coups de pointeau, une vis entre cuir et chair, ou encore par de la colle. Traditionally, the sealing between the two chambers A and B is carried out by an O-ring and the braking on release by a lock nut, needle punch, a screw between leather and flesh, or even by glue.

Ces solutions comprennent plusieurs pièces supplémentaires, un temps d'usinage plus important et souvent une impossibilité de démontage. These solutions include several additional parts, a longer machining time and often an impossibility of disassembly.

Les dessins annexés illustrent l'invention: - La figure 1 représente en coupe les trois pièces, dont il est sujet, avant montage. The accompanying drawings illustrate the invention: - Figure 1 shows in section the three parts, of which it is subject, before assembly.

- La figure 2 situe dans son environnement l'ensemble monté.- Figure 2 situates in its environment the assembled assembly.

- La figure 3 représente la bague avant blocage complet du piston.- Figure 3 shows the ring before complete blocking of the piston.

- La figure 4 représente la bague après blocage complet du piston.- Figure 4 shows the ring after complete blocking of the piston.

Le dispositif selon l'invention permet de remédier aux inconvénients ci-dessus
exposés. n est constitué d'une seule et unique bague (2) tournée ou moulée, d'une
matière aux propriétés mécaniques particulièrement adaptées, telles que sa rémanence
élastique, sa résistance à l'usure et sa ténacité. Elle est enfilée sur l'extrémité (31) de la
tige (3). Le piston (1) est ensuite lui-même vissé sur les filets (32) de l'extrémité (31) de
la tige (3).The device according to the invention overcomes the above drawbacks
exposed. n consists of a single, turned or molded ring (2), a
material with particularly suitable mechanical properties, such as its persistence
elastic, its resistance to wear and its toughness. It is threaded on the end (31) of the
rod (3). The piston (1) is then itself screwed onto the threads (32) of the end (31) of
the rod (3).

Lorsque le piston (1) vient en contact avec la bague (2), il comprime fortement celle-ci contre l'épaulement (33) de la tige (3) et de plus, par déformation, la bague (2) pénètre dans les filets (32) du filetage. Ces compressions axiales et radiales provoquent une charge extrêmement importante:
- premièrement sur l'épaulement (33) de la tige (3) empêchant tout passage du fluide entre les chambres A et B,
- deuxièmement, entre les flancs du filet (32) et l'alésage (11) du piston (1), ayant pour effet d'auto-freiner fortement ce dernier contre un déblocage intempestif
L'assemblage reste toutefois démontable sans détérioration d'aucune pièce.When the piston (1) comes into contact with the ring (2), it strongly compresses the latter against the shoulder (33) of the rod (3) and moreover, by deformation, the ring (2) penetrates into the threads (32) of the thread. These axial and radial compressions cause an extremely heavy load:
firstly on the shoulder (33) of the rod (3) preventing any passage of the fluid between the chambers A and B,
- secondly, between the sides of the thread (32) and the bore (11) of the piston (1), having the effect of strongly self-braking the latter against an untimely release
The assembly remains dismountable, however, without damaging any part.

Le volume de la bague (2) peut être plus ou moins important suivant la grosseur de l'assemblage et la résistance au déblocage désirée. The volume of the ring (2) can be more or less important depending on the size of the assembly and the desired release resistance.

Les dimensions du filetage (32) et de l'épaulement (33) peuvent également varier suivant la résistance à l'arrachement du piston (1) et du centrage de celui-ci sur l'épaulement (33).  The dimensions of the thread (32) and of the shoulder (33) can also vary according to the resistance to tearing of the piston (1) and of the centering of the latter on the shoulder (33).

Claims (2)

REVENDICATIONS 1. Dispositif pour étancher et freiner au desserrage le piston (1) vissé sur la tige (3) d'un vérin hydraulique caractérisé en ce qu'il comporte une bague (2) enfilée sur l'extrémité (31) de la tige (3) et comprimée par le piston (1), vissé sur l'extrémité (31) de la tige (3), contre l'épaulement (33) de la tige (3) entraînant la déformation de la dite bague (2) et sa pénétration entre les flancs du filet (32) du filetage, ceci ayant pour effet, d'une part, d'empêcher tout passage de fluide entre les chambres (A et B) et d'autre part, grâce aux charges radiales provoquées entre les flancs du filet (32) et l'alésage (11) du piston (l) de freiner fortement ce dernier contre tout déblocage intempestif. 1. Device for sealing and braking on loosening the piston (1) screwed onto the rod (3) of a hydraulic cylinder characterized in that it comprises a ring (2) threaded on the end (31) of the rod ( 3) and compressed by the piston (1), screwed onto the end (31) of the rod (3), against the shoulder (33) of the rod (3) causing the deformation of said ring (2) and its penetration between the sides of the thread (32) of the thread, this having the effect, on the one hand, of preventing any passage of fluid between the chambers (A and B) and on the other hand, thanks to the radial loads caused between the sides of the net (32) and the bore (11) of the piston (l) strongly brake the latter against any untimely release. 2. Dispositif selon la revendication 1 caractérisé en ce que la bague (2) est constituée d'une matière aux propriétés mécaniques particulièrement adaptées pour permettre l'étanchéité et sa pénétration dans les filets, telles que sa rémanence élastique, sa résistance à l'usure et sa ténacité.  2. Device according to claim 1 characterized in that the ring (2) consists of a material with mechanical properties particularly suitable for allowing sealing and its penetration into the threads, such as its elastic persistence, its resistance to wear and tenacity.
FR9614035A 1996-11-12 1996-11-12 DEVICE FOR SEALING THE TWO CHAMBERS OF A CYLINDER, SEPARATED BY A PISTON, WHILE PREVENTING IT FROM UNLOCKING Expired - Fee Related FR2755739B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9614035A FR2755739B1 (en) 1996-11-12 1996-11-12 DEVICE FOR SEALING THE TWO CHAMBERS OF A CYLINDER, SEPARATED BY A PISTON, WHILE PREVENTING IT FROM UNLOCKING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9614035A FR2755739B1 (en) 1996-11-12 1996-11-12 DEVICE FOR SEALING THE TWO CHAMBERS OF A CYLINDER, SEPARATED BY A PISTON, WHILE PREVENTING IT FROM UNLOCKING

Publications (2)

Publication Number Publication Date
FR2755739A1 true FR2755739A1 (en) 1998-05-15
FR2755739B1 FR2755739B1 (en) 1998-12-18

Family

ID=9497722

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9614035A Expired - Fee Related FR2755739B1 (en) 1996-11-12 1996-11-12 DEVICE FOR SEALING THE TWO CHAMBERS OF A CYLINDER, SEPARATED BY A PISTON, WHILE PREVENTING IT FROM UNLOCKING

Country Status (1)

Country Link
FR (1) FR2755739B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312810A1 (en) * 2001-11-16 2003-05-21 Hyco Pacoma GmbH Piston/cylinder unit with anti-rotation between piston and rod
DE102013223221B3 (en) * 2013-11-14 2015-03-05 Zf Friedrichshafen Ag Attaching a piston to a piston rod
DE202020005143U1 (en) 2020-12-11 2022-03-15 Bümach Engineering lnternational B.V. Piston unit of a working cylinder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072434A (en) * 1975-12-03 1978-02-07 Homuth Kenneth C Hydraulic cylinder with concentrically maintained piston and rod
FR2420677A1 (en) * 1978-03-21 1979-10-19 Clark Equipment Co Linear action fluid motor - has piston screwed onto rod with threads formed to compensate for manufacture tolerance
US4815360A (en) * 1986-07-02 1989-03-28 Albert Winterle Rod-piston connection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072434A (en) * 1975-12-03 1978-02-07 Homuth Kenneth C Hydraulic cylinder with concentrically maintained piston and rod
FR2420677A1 (en) * 1978-03-21 1979-10-19 Clark Equipment Co Linear action fluid motor - has piston screwed onto rod with threads formed to compensate for manufacture tolerance
US4815360A (en) * 1986-07-02 1989-03-28 Albert Winterle Rod-piston connection

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312810A1 (en) * 2001-11-16 2003-05-21 Hyco Pacoma GmbH Piston/cylinder unit with anti-rotation between piston and rod
US6837144B2 (en) 2001-11-16 2005-01-04 Hyco Pacoma Gmbh Piston and cylinder unit including a housing, a piston and a piston rod
DE102013223221B3 (en) * 2013-11-14 2015-03-05 Zf Friedrichshafen Ag Attaching a piston to a piston rod
WO2015071039A3 (en) * 2013-11-14 2015-07-09 Zf Friedrichshafen Ag Securing of a piston to a piston rod
DE202020005143U1 (en) 2020-12-11 2022-03-15 Bümach Engineering lnternational B.V. Piston unit of a working cylinder
WO2022122063A1 (en) * 2020-12-11 2022-06-16 Bümach Eingineering International B.V. Piston unit of a working cylinder

Also Published As

Publication number Publication date
FR2755739B1 (en) 1998-12-18

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