FR2718201A1 - Double nut for ball or roller drive screws - Google Patents

Double nut for ball or roller drive screws Download PDF

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Publication number
FR2718201A1
FR2718201A1 FR9403965A FR9403965A FR2718201A1 FR 2718201 A1 FR2718201 A1 FR 2718201A1 FR 9403965 A FR9403965 A FR 9403965A FR 9403965 A FR9403965 A FR 9403965A FR 2718201 A1 FR2718201 A1 FR 2718201A1
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France
Prior art keywords
nuts
balls
ball
nut
roller drive
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Granted
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FR9403965A
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French (fr)
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FR2718201B1 (en
Inventor
Laparra Andre
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Individual
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Individual
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Priority to FR9403965A priority Critical patent/FR2718201B1/en
Publication of FR2718201A1 publication Critical patent/FR2718201A1/en
Application granted granted Critical
Publication of FR2718201B1 publication Critical patent/FR2718201B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2209—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with arrangements for taking up backlash

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The unit consists of a threaded rod (1) with balls or rollers, containing two nuts (2,3) which are loaded by the intermediary of joining pieces (4) which butt against balls (5) lodged in a washer (6) which is solid with an external housing (7) by fixing pegs (8). In the interposing of roller stops (10) between the nuts (2,3) and the housing (7), a small rotation of the nuts is permitted which caused the balls (5) to wedge up in the conical recesses in the faces of the joining pieces which takes up any play when a torque is applied to one of the nuts.

Description

La présente invention a pour objet, un assemblage nouveau de deux écrous, destiné à équiper normalement la vis à billes ou à rouleaux correspondante. The subject of the present invention is a new assembly of two nuts, intended to normally equip the corresponding ball or roller screw.

Le groupement de deux écrous, est un procédé connu, qui permet en éliminant les jeux, d'obtenir une rigidité prédéterminée de l'ensemble vis écrou. The grouping of two nuts, is a known process, which makes it possible, by eliminating the play, to obtain a predetermined rigidity of the screw nut assembly.

Ce nouvel assemblage, n'élimine plus les jeux, mais permet pour les deux sens de l'effort, d'additionner la capacité de charge dynamique de chacun des écrous, en traction ou en compression simple. This new assembly, no longer eliminates play, but allows for both directions of effort, to add the dynamic load capacity of each of the nuts, in tension or in simple compression.

Le prix de ces nouveaux ensembles, composés d'éléments réduits, standard, courants, devient considérablement diminué. The price of these new sets, made up of reduced, standard and standard components, has dropped considerably.

Description : voir Planche 1/1. Echelle 1. Description: see Plate 1/1. Scale 1.

L'ensemble comprend, une vis à billes (1), diamètre 40 mm, qui peut transmettre 2 X 50 KN, par exemple, pour les deux sens de l'effort 6 suivant les conventions pour 10 tours de la vis (1).  The set includes, a ball screw (1), diameter 40 mm, which can transmit 2 X 50 KN, for example, for both directions of force 6 according to the conventions for 10 turns of the screw (1).

Elle est équipée de deux écrous standard (2) et (3), vissés dans deux embouts identiques (4). Ces embouts comportent des usinages coniques, servant d'appui à des billes (5) logées dans les trous d'une rondelle (6) solidaire d'un carter (7) par des goupilles (8). It is fitted with two standard nuts (2) and (3), screwed into two identical end pieces (4). These tips include conical machining, serving to support balls (5) housed in the holes of a washer (6) secured to a housing (7) by pins (8).

Le carter (7) est fermé par deux écrous identiques (9). Deux butées à aiguilles (10), transmettent la charge totale C des embouts (4) au carter fixe (7). The casing (7) is closed by two identical nuts (9). Two needle stops (10) transmit the total load C from the end pieces (4) to the fixed casing (7).

La distance entre les écrous (9) est prévue, pour tolérer un jeu intérieur, au moins égal à celui de la vis (1), dans ses écrous (2) et (3). The distance between the nuts (9) is provided, to tolerate an internal clearance, at least equal to that of the screw (1), in its nuts (2) and (3).

La forme des pièces (4) à (9) n'est comprise qu'à titre d'exemple.The shape of the parts (4) to (9) is only understood by way of example.

Fonctionnement
Une charge C, appliquée en traction ou compression sur le carter (7), prend d'abord appui sur l'un des deux roulements de butée (10), puis sur l'un des deux embouts (4), solidaire de l'écrou (2) ou (3), suivant le sens de la charge C.Operation
A load C, applied in traction or compression on the casing (7), first takes support on one of the two thrust bearings (10), then on one of the two end pieces (4), integral with the nut (2) or (3), depending on the direction of the load C.

Exemple : Planche 1/1, l'écrou (2) premier concerné, prend appui sur le filet oblique de la vis (1), ce qui engendre une rotation dudit écrou et de son embout suivant R.Example: Plate 1/1, the nut (2) first concerned, is supported on the oblique thread of the screw (1), which generates a rotation of said nut and its end piece according to R.

Les usinages coniques de cet embout (4), en butée contre les billes (5), limitent la rotation, après compensation du jeu de l'écrou (3), par une course verticale des billes (5) de l'embout (4) et de son écrou (3).  The conical machining of this end piece (4), in abutment against the balls (5), limit the rotation, after compensation for the play of the nut (3), by a vertical stroke of the balls (5) of the end piece (4 ) and its nut (3).

Le jeu supprimé, l'ensemble est statiquement stable. En utilisation dynamique, sous l'effet de C et d'un couple exercé sur la vis (1), l'écrou (2) et son embout (4), agit directement sur le roulement (10). The game removed, the whole is statically stable. In dynamic use, under the effect of C and a torque exerted on the screw (1), the nut (2) and its end piece (4) acts directly on the bearing (10).

Cette action n' est possible, qu'en prenant appui sur le carter (7), par l'intermédiaire des billes (5), de la rondelle (6) et des goupilles (8) d'une part. D'autre part, sur l'embout (4) de l'écrou (3) qui par réaction peut transmettre une partie du couple exercé sur la vis (1). This action is only possible by resting on the casing (7), by means of the balls (5), the washer (6) and the pins (8) on the one hand. On the other hand, on the end piece (4) of the nut (3) which by reaction can transmit part of the torque exerted on the screw (1).

Ce couple peut être égal à celui du à l'écrou (2). This torque can be equal to that of the nut (2).

Intérêt industriel et commercial
Prix de revient réduit ou celui par exemple d'une vis diamètre 40 mm plus deux écrous contre celui d'une vis 80 mm et plus, équipée d'un seul écrou.Industrial and commercial interest
Reduced cost price or that of, for example, a 40 mm diameter screw plus two nuts versus that of an 80 mm and more screw, fitted with a single nut.

Avec éventuellement des possibilités de réduction de volume du nouvel écrou.  Possibly with possibilities to reduce the volume of the new nut.

Claims (3)

REVENDICATIONS 1) Dispositif qui permet de doubler la capacité de charge dynamique d'une vis à billes ou à rouleaux, caractérisé par l'utilisation simultanée de deux écrous (2) et (3), dont les couples s'additionnent par l'intermédiaire des embouts (4) en butée contre les billes (5) logées dans une rondelle (6), solidaire du carter extérieur (7) par des goupilles (8). 1) Device which makes it possible to double the dynamic load capacity of a ball or roller screw, characterized by the simultaneous use of two nuts (2) and (3), the torques of which add up via the end caps (4) in abutment against the balls (5) housed in a washer (6), secured to the outer casing (7) by pins (8). 2) Dispositif selon la revendication 1, caractérisé par l'interposition de roulements de butée (10) entre les écrous (2) et (3) et le carter (7), qui permettent par de légères rotations de ces écrous, de compenser les jeux et les successives variations de pas. 2) Device according to claim 1, characterized by the interposition of thrust bearings (10) between the nuts (2) and (3) and the housing (7), which allow by slight rotations of these nuts, to compensate for the games and successive step variations. 3) Dispositif selon la revendication (1), caractérisé par les usinages coniques des embouts (4) dont l'obliquité des parois sert de butée aux billes (5).  3) Device according to claim (1), characterized by the conical machining of the tips (4) whose obliquity of the walls serves as a stop for the balls (5).
FR9403965A 1994-04-05 1994-04-05 Double nut for ball or roller screws. Expired - Fee Related FR2718201B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9403965A FR2718201B1 (en) 1994-04-05 1994-04-05 Double nut for ball or roller screws.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9403965A FR2718201B1 (en) 1994-04-05 1994-04-05 Double nut for ball or roller screws.

Publications (2)

Publication Number Publication Date
FR2718201A1 true FR2718201A1 (en) 1995-10-06
FR2718201B1 FR2718201B1 (en) 1996-04-26

Family

ID=9461736

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9403965A Expired - Fee Related FR2718201B1 (en) 1994-04-05 1994-04-05 Double nut for ball or roller screws.

Country Status (1)

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FR (1) FR2718201B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191021192A (en) * 1910-09-12 1911-06-08 August Schroeder Improvements in Nut Locking Devices.
DE8806205U1 (en) * 1987-08-19 1988-06-30 Fertigungstechnik Walter Hafner, 8751 Kleinwallstadt Positive-locking force-limiting clutch
FR2638791A1 (en) * 1988-11-10 1990-05-11 Aerospatiale LOCK FOR EQUIPMENT SUPPORT
EP0379834A1 (en) * 1989-01-25 1990-08-01 Kinematica Ag Coupling device, especially for dispersion apparatuses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191021192A (en) * 1910-09-12 1911-06-08 August Schroeder Improvements in Nut Locking Devices.
DE8806205U1 (en) * 1987-08-19 1988-06-30 Fertigungstechnik Walter Hafner, 8751 Kleinwallstadt Positive-locking force-limiting clutch
FR2638791A1 (en) * 1988-11-10 1990-05-11 Aerospatiale LOCK FOR EQUIPMENT SUPPORT
EP0379834A1 (en) * 1989-01-25 1990-08-01 Kinematica Ag Coupling device, especially for dispersion apparatuses

Also Published As

Publication number Publication date
FR2718201B1 (en) 1996-04-26

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