FR2545888A1 - VERIN, IN PARTICULAR MICROVERIN COMPRISING A DEVICE FOR SUPPORTING ADDITIONAL EXTERNAL ELEMENTS - Google Patents

Abstract

1. Ram, particularly micro-ram, comprising a substantially cylindrical, hollow body (4) in which is movably mounted a piston (5) dividing the internal space of the said body (4) into two chambers of variable volume (6, 7) each of them being provided with a port (8) for fluid supply or fluid exhaust of the chamber (6 or 7), and a support device (2) of supplementary elements (3, 42), if necessary indicating a parameter of the ram functioning, such as bars (17) fixed on the external surface of the body (4), characterized in that the fixing means (20, 20') of the support device (2) are mounted in the feeding ports (8) and are formed by members likely to be introduced each one, notably screwed, in a feeding port (8), each member (20, 20') passed by a channel allowing the inlet of the forced fluid to the interior of the ram.

Description

The present invention relates to a jack, in particular a micro-jack,

  comprising a substantially hollow cylindrical body in which is mounted movable a piston dividing the internal space of said body into two chambers of variable volume, each of which is provided with an orifice for supplying pressurized fluid to this chamber or for its implementation to the exhaust, and an additional device support device is, if appropriate, an indicator of a cylinder operating parameter, such as

  bars, fixed on the outer surface of the body.

  In the case of known cylinders of this type, the bars are fixed on the jack by screws in angularly offset zones, for example 900, feed or exhaust ports to leave

free access to these openings.

  This arrangement of the bars is disadvantageous because it results in a cylinder having a large footprint. The present invention aims to overcome this disadvantage and to propose a cylinder of the type stated more

high, a small footprint.

  To achieve this purpose, the jack according to the invention is characterized in that the fastening means of the support device are mounted in the orifices.

Power.

  According to an advantageous characteristic of the invention

  the fixing means are formed by members that can each be screwed into a feed orifice, each member being traversed by a channel allowing the passage of the fluid under pressure to

the inside of the cylinder.

  According to another advantageous characteristic of the invention, for a jack whose support device is formed by at least one bar extending along the jack, this bar is of tubular shape and has an axial channel communicating at one end, at through a passage made in the fixing means with a supply port, while the other end serves as a supply fluid inlet, the supply connections of the cylinder can be located at the same end of the cylinder. According to yet another advantageous characteristic of the invention, the jack according to the invention comprises at least one control stitching device produced in the form of a flange supported by the support device, advantageously in the form of a bar and having an aligned passage channel. with a hole passing through the cylinder body. The invention will be better understood and other purposes, features, details and advantages thereof

  will become clearer during the description

  explanatory text which follows, with reference to the accompanying drawings given by way of example only, illustrating several embodiments of the invention and in which: FIG. 1 is a perspective view of a jack according to the present invention equipped with a device support; Figure 2 is a sectional view perpendicular to the axis of the cylinder, along the line II-II of Figure 1, on a larger scale; Figure 3 is an axial sectional view of the cylinder according to Figure 1; FIG. 4 is a view in axial section of a screw

  snap-on fastening system, for fixing the-

  support device according to the present invention;

  FIG. 5 is a perspective view of a device

  carrier bracket comprising hollow bars, according to the present invention; Figure 6 is a top view of a jack equipped with a support device according to Figure 5 shown in a sectional view along the line VI-VI; Figure 7 is a sectional view along the line VII-VII of Figure 6, reduced scale; FIG. 8 is a perspective view of a jack equipped with control stitching devices, according to the present invention, and FIG. 9 is an axial sectional view of the jack.

according to Figure 8.

  FIGS. 1 to 3 show a micro-jack 1 according to the present invention, which is equipped with a support device 2 adapted, in the example shown, to carry a magnetic sensor 3 The jack comprises a substantially cylindrical hollow body 4 in which is movably mounted in a movement back and forth a piston 5 which divides the inside of the cylinder into two chambers 6 and 7 of variable volume The reference lldesigne the piston rod The cylinder is of the double-acting type Each chamber can be fed with a fluid under pressure or exhausted through a feed port 8 In the example shown, the body 4 comprises a tube 9 closed at each end by a sealing flange 10 The feed orifices 8 are practiced in these flanges and

  extend perpendicular to the axis thereof.

  The piston 5 carries an annular permanent magnet 12 situated between two sealing rings 13. The magnetic sensor 3 is formed in the example represented by a relay of the Reed type, provided with a contact set 14 located inside Such relays are well known in the art and allow to signal,

  in known manner in soijles passages of the piston 5 of the cylinder.

  In the example shown; the support device 2 comprises two support bars 17 and two support bars 18 each associated with a closure flange 10 of the jack The bars are advantageously formed by cylindrical rods, but can be of any other form

  They are attached to the supports 18 by -

  fitting their end into appropriate holes

  practiced in the parts forming support-bar 18.

  Here we obtain a very stable support device for the magnetic sensors 3 or for any other accessory or additional device desired, intended if necessary to provide information relating to certain parameters of the operation of the-cylinder These devices will be

  advantageously supported by the rods 17.

  According to the present invention, the support device 2 is assembled to the jack 1 by fixing each stop support piece 18 to a closing clamp 10 of the jack, by means of a fastening screw 20 which is screwed directly into the jack. the supply port 8 of

  this flange, provided for this purpose with a threaded portion 21.

  To ensure the supply of pressurized fluid to the jack, each screw 20 has an axial feed channel 22 which passes through it entirely. The head part of the screw is shaped to allow the connection to a tube or feed pipe (not shown) For this purpose, the head has in Figure 2 a central threaded recess 23 having a diameter greater than that of the channel 22 In the embodiment of a fastening screw, shown in Figure 4, the connection of the screw Hollow to a feed tube 25 is obtained by the insertion of an instantaneous connector 26 known per se The reference numerals 27 to 32 respectively designate an O-ring, a fan washer, a metal washer, an element of

  thrust 30 and a retaining ring 31.

  FIGS. 5 to 7 show another embodiment of the support device 2 and a jack 1 according to the present invention. In this case, the support bars are tubular, which makes it possible to use at least one of these bars. In this way it is possible to provide the two connections to the feed device, at one end of the jack. In this case, the support pieces of the jack bar and the fixing screws are shaped somewhat differently In FIGS. 5 and 6,

  these elements are designated by references 18 'and 20'.

  As shown in FIG. 6, the support-bar 18 'on the right has the two supply ports indicated by 32, 33 These orifices or recesses shaped for connection to the supply system extend parallel to the axis of the jack The orifice 32 communicates directly with the fixing hole 35 of the support 18 'intended to receive the fixing screw 20'. The orifice 33 communicates with the hole 35 for receiving the fixing screw of the other support. bar 18 ', through the corresponding tubular strip 17' and ducts 37, 38 respectively formed in the connection support 18 'and the support bar-left, that is to say without holes or Figure 7 shows the fastening screws 20 'assorted tubular bars The screws 18' comprise at the level of the duct 38 a transverse channel 39 which communicates via an axial channel 40

with the internal space of the cylinder.

  FIGS. 8 and 9 show an embodiment of a jack according to the present invention in which the support device, or more precisely the bars, are used to support one or more control stitching flanges. In the example represented, two flanges

  stitching 42 are interposed between the two support-

  Each flange comprises a channel 43 which passes through it. The upper part of the channel is widened to form a threaded recess allowing the connection to an external device. These recesses could be made so as to allow an instantaneous connection of the type represented in FIG. lower part of the channel passing through the flange communicates with the inside of the jack

  through a hole 45 through the tube 8 of the cylinder body.

  These control stitching devices can be used for any useful purpose In the case shown, the two flanges are arranged so as to enable the signaling of the end positions of the piston. For this purpose, each flange will be associated with a logic device, for example

  two inputs connected respectively to the feed orifice

  corresponding cation and flange.

  It should be noted in the context of the present invention, that the bars can be used as support member of an additional device and / or to serve as a tube incorporated in the pressurized fluid supply system, the cylinder as is 5 to 7 Moreover, the fastening screws can perform, in addition to their actual fastening function, additional functions such as, for example, those of the speed adjustment means. It is therefore necessary to ensure, as is known, that in itself, that the cross section of

  passage of the fluid under pressure is variable.

  The cylinders according to the invention which have been described and shown can be modified in various ways without departing from the scope of the invention. Thus the cylinders can be of the single-acting type.

  control can be adjustable.

  Jack, in particular a micro-jack, comprising a substantially hollow cylindrical body in which is mounted movable a piston dividing the internal space of said body into two chambers of variable volume, each of which is provided with an orifice for supplying fluid or for the exhaust of the chamber, and a device for supporting additional elements, if necessary indicating an operating parameter of the cylinder, such as

  strips attached to the outer surface of the body,

  in that the fastening means (20, 20 ') of the support device (2) are mounted in the supply ports (8). 2 cylinder according to claim 1, characterized in that the fastening means (20, 20 ') are formed by members each screwable in a supply port (8), each member (20,20') being traversed by a channel allowing the passage of fluid under pressure

inside the cylinder (1).

  Jack according to Claim 2, characterized in that the fastening member (20, 20 ') is formed by a screw that can be screwed into a threaded portion (21).

of the supply port (8).

  Jack according to claim 3, characterized in that the fastening screw (20) is provided with an axial channel (22) which passes entirely through it, the portion of the channel located in the head of the screw being shaped so as to form a

connecting means.

  Cylinder according to claim 4, characterized in that the connecting means is formed by a coupling

instantaneous (26).

  Jack according to one of claims 1 or 2,

  equipped with a support device comprising bars extending parallel to the axis of the cylinders, characterized in that at least one bar (17) is tubular and has an axial channel communicating through a conduit (38) formed in the support-bar (18 ') corresponding and the fixing means (20') with the supply port (8) of one of the chambers (6, 7) of the jack, to allow the feeding and setting exhausting these chambers (6,7) from a single end of the cylinder. 7 cylinder according to claim 6, characterized in that the fastening means advantageously formed by a screw has a transverse channel in alignment with the aforementioned conduit (38) and communicating via a channel

  axial (20) with the supply port (8).

  8 cylinder according to one of the preceding claims,

  characterized in that the fixing means (20, 20 ') advantageously formed by screws, are made in a

  to allow adjustment of the speed of the piston (5).

  Jack according to one of the preceding claims,

  characterized in that it comprises at least one control quilting device (42) in the form of a flange supported by the support device (2) and having a passage channel (43) aligned with at least one hole ( 45)

  through the cylinder body, the flange could be adjustable.

  Cylinder according to one of the preceding claims,

  characterized in that the support device (2) is adapted to support a cooperating magnetic sensor (3)

  with a permanent magnet (12) associated with the piston (5).