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EP0460457B1 - Etau de machines - Google Patents

Etau de machines Download PDF

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Publication number
EP0460457B1
EP0460457B1 EP91108333A EP91108333A EP0460457B1 EP 0460457 B1 EP0460457 B1 EP 0460457B1 EP 91108333 A EP91108333 A EP 91108333A EP 91108333 A EP91108333 A EP 91108333A EP 0460457 B1 EP0460457 B1 EP 0460457B1
Authority
EP
European Patent Office
Prior art keywords
screw spindle
spindle
clamping jaw
machine vise
abutment
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.)
Expired - Lifetime
Application number
EP91108333A
Other languages
German (de)
English (en)
Other versions
EP0460457A3 (en
EP0460457A2 (fr
EP0460457B2 (fr
Inventor
Franz Arnold
Konrad Kreuzer
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
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Priority claimed from DE19904018194 external-priority patent/DE4018194C1/de
Application filed by Individual filed Critical Individual
Publication of EP0460457A2 publication Critical patent/EP0460457A2/fr
Publication of EP0460457A3 publication Critical patent/EP0460457A3/de
Publication of EP0460457B1 publication Critical patent/EP0460457B1/fr
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Publication of EP0460457B2 publication Critical patent/EP0460457B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/18—Arrangements for positively actuating jaws motor driven, e.g. with fluid drive, with or without provision for manual actuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/106—Arrangements for positively actuating jaws using screws with mechanical or hydraulic power amplifiers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B1/00—Vices
    • B25B1/24—Details, e.g. jaws of special shape, slideways
    • B25B1/2405—Construction of the jaws
    • B25B1/2473—Construction of the jaws with pull-down action on the workpiece

Definitions

  • the invention relates to a machine vice according to the preamble of claim 1.
  • the drive device has a non-rotatably connected threaded sleeve to the screw spindle, a drive spindle acting on the primary element of the booster and a torque coupling provided between this and the threaded sleeve.
  • the booster is designed as a mechanical booster, the secondary member of the booster always moving in the same direction as the primary member when the primary member is actuated.
  • the housing which surrounds the power amplifier, is rotatably mounted in an abutment plate connected to one end of the base body, but is axially immovable.
  • the entire drive device protrudes outward beyond the abutment plate, as a result of which the overall length of the machine vice is large in relation to its maximum span.
  • the screw spindle presses under high pressure on the spindle nut under the influence of the power amplifier, as a result of which a correspondingly large, outwardly directed reaction force is exerted on the abutment plate.
  • the clamping force exerted on the workpiece by the movable clamping jaw also generates an outward reaction force in the movable clamping jaw and in the fixed clamping jaw.
  • reaction forces in the movable clamping jaw and the abutment are directed opposite to the reaction forces in the fixed clamping jaw, these reaction forces can cause the base body to deflect such that the base body bulges upwards in the middle. This in turn has the consequence that the previously parallel clamping surfaces of the clamping jaws are no longer exactly parallel to one another, but diverge upwards. As a result, the clamping surfaces only rest with their lower areas on the workpiece and this is no longer securely clamped.
  • the invention is therefore based on the object of designing a machine vice of the type mentioned in such a way that the base body is subjected to as little bending stress as possible when clamping, and that the machine vice simultaneously has a favorable ratio between overall length and maximum span.
  • the solution to the problem is particularly suitable for mechanical power amplifiers in which the secondary member moves in the same direction as the primary member when the primary member is actuated.
  • the power amplifier is arranged on the side of the abutment facing away from the screw spindle. The pressure force exerted by the push rod on the primary member during tensioning consequently shifts the primary member outward, as a result of which the secondary member is also pressed outward. This outward-directed high-pressure force is, however, transmitted to the screw spindle by means of the train connection guided past the outside of the power amplifier and through the abutment.
  • DE-GM 87 17 051 describes a machine vice with a threaded spindle, the abutment of which is arranged in the region below the fixed vice jaw and whose spindle nut transmits the clamping force as tensile force to a slide carrying the movable jaw when clamping. This is intended to establish a direct frictional connection of the jaws via the screw spindle, as a result of which the vice body itself remains largely relieved of the clamping forces.
  • this machine vice has no power amplifier and therefore also no drive device which actuates the power amplifier and the screw spindle together.
  • the workpiece remains practically unchanged during the clamping process.
  • the vice is easy to use and offers a wide range of uses.
  • the overall length which is the sum of the fixed jaw, the clamping area and the movable clamping jaw, is only equal to the length of the base body, so that there are no protruding parts. All spindle parts are integrated in the base body. When using a tension spindle, there is no bending of the base body due to the clamping force. Despite a very short spindle nut, tilting of the movable jaw is avoided.
  • the slide can be moved with the crank over the entire clamping path, which can be reduced to zero, and the use of standard jaws of other types of clamps and of top jaws for extending the clamping range is easily possible. There is free space below the clamping range for the necessary run-out of drilling or tapping tools.
  • the base body 1 which is essentially U-shaped in cross section, has a fixed clamping jaw 2 at one end, which preferably consists of one piece with the base body.
  • a movable clamping jaw 3 is displaceable in direction B in the base body 1 perpendicular to the fixed clamping jaw 2.
  • the movable clamping jaw 3 has a downward-facing shoulder 4 which engages in the base body 1 and in which the spindle nut 5 is incorporated.
  • a screw spindle 7 is arranged in the continuous recess 6 of the base body 1 and engages in the spindle nut 5.
  • a mechanical power amplifier 8 of a known type (cf. DE-U-78 30 221) is arranged in the base body 1.
  • An abutment part 8a is supported on an abutment 9 which engages between the power amplifier 8 and an end 7a of the screw spindle adjacent to the fixed clamping jaw 2.
  • the abutment 9, as shown in FIG. 5, could also be provided directly in the vice body 1.
  • the abutment 9 is preferably provided on an abutment bush 10 which is inserted into a corresponding cylindrical through-bore 11 in the base body 1.
  • the abutment bushing At its end facing away from the screw spindle 7, the abutment bushing has a flange 12 with which it is supported on an annular shoulder 13 of the base body, which adjoins the through bore 11.
  • the abutment sleeve 10 extends with its end 10a facing the screw spindle 7 at least up to the end 2a of the fixed clamping jaw 2 facing the screw spindle.
  • the abutment sleeve 10 is closed at its end facing away from the screw spindle 7 by a pot-like cover 14. This cover 14 and the abutment sleeve 10 are held in the through hole 11 by a spring ring 15.
  • the power amplifier 8 has a wedge-shaped primary member 16 and a disk-shaped secondary member 17. If the primary member 16 is moved in the direction C to the left by the push rod 18 arranged in the hollow spindle 7, then the rollers 19 are pressed into a space which narrows radially outward. As a result, the secondary member 17 is also moved to the left with a corresponding power transmission, but by a smaller amount than the primary member 16. In order to always keep the parts 16, 17 and 19 of the booster 8 in mutual contact and also to return them to their starting position, there is a compression spring 20 is provided, which is preferably arranged between the cover 14 and the secondary member 17.
  • a pulling sleeve 21 is provided concentrically to this in the abutment bushing 10 and can be axially displaced in the abutment bushing 10 and surrounds the power amplifier 8.
  • the tension sleeve is closed at one end by a screw cap 22, on the inside of which the secondary member 17 is supported.
  • the tension sleeve 21 has three axially directed tension webs 23 which are arranged at equal angular distances from one another and which are arranged at the same circumferential angular distances from one another. These tension webs 23 each extend through corresponding axial recesses 24 in the abutment bushing 10 to the end 7a of the screw spindle adjacent to the fixed clamping jaw 2.
  • the tension webs 23 are provided at their ends with radially inwardly directed claws 23a which engage behind a flange 25 provided at the end 7a of the screw spindle 7.
  • a seal 26 seals the interior of the abutment bush 10 from the screw spindle end 7a.
  • a common drive device 27 is also provided, with which both the screw spindle 7 and the power amplifier 8 can be driven one after the other in time.
  • the drive device 27 is arranged in the end 1a of the base body 1 opposite the fixed jaw 2 in such a way that it lies entirely or at least essentially within the base body 1 and the movable jaw 3, as shown in FIG. 1, is full open position above the drive device 27.
  • the drive device 27 is enclosed by a cylindrical housing 28, the end of which faces the screw spindle 7 is connected to the screw spindle in a rotationally fixed but axially displaceable manner via a positive connection.
  • the positive connection can consist, for example, in that the housing 28 has at its one end 28a an opening 28c with a hexagonal cross section, which includes the correspondingly hexagonal end 7b of the screw spindle 7.
  • the other end 28b of the housing is rotatably and axially immovably mounted in a holding plate 29 connected to the base body 1.
  • the drive device 27 further comprises a threaded sleeve 30 which is fixedly connected to the housing 28. In the threaded sleeve 30 engages a drive spindle 31, the outer end of which is provided with a hexagon socket 31 a.
  • a hand crank, not shown, can be inserted into the hexagon socket 31 a.
  • a torque clutch which, in the exemplary embodiment shown, consists of a clutch disc 33 which is non-rotatably connected to the drive spindle 31 but can be displaced thereon against the force of the spring 32 and which engages with a cam 34 in a corresponding recess in the threaded sleeve 30.
  • the drive spindle 31 and the threaded sleeve 30 are connected to one another in a rotationally fixed manner until a predetermined torque is reached via the torque coupling 32-34.
  • the drive spindle 31 can then be rotated by means of a hand crank (not shown) and takes the threaded sleeve 30 and the cylindrical housing 28 connected to it in a rotationally fixed manner via the torque coupling 32-34.
  • the screw spindle 7 is driven via the positive connection 7b / 28c. This moves the movable clamping jaw 3 to the left in the direction of the workpiece W by means of the spindle nut 5 until the movable clamping jaw 3 lies against the workpiece W. If the clamping pressure increases, the torque clutch 32-34 disengages and the screw spindle 7 is no longer driven.
  • the outside of the booster 8 and passing through the abutment 9 train connection between the secondary part 17 and the end 7a of the screw 7 can also be equipped in other ways.
  • the drive end of this embodiment is designed exactly as shown in Figs. 1 and 3 of the previous embodiment. Parts of the same function are designated by the same reference numerals, so that the above description applies accordingly.
  • the train connection has at least two axially directed tension bolts 35, which extend through axially directed bores 36 of the abutment 9 or base body 1.
  • the tension bolts 35 are connected on the one hand to a washer 17a carrying the secondary member 17 and on the other hand to a ring 37 surrounding the end 7a of the screw spindle. This ring engages behind the flange 25 provided at the end 7a of the screw spindle 7.
  • a hydraulic power amplifier 38 is used in each case.
  • parts of the same function are designated with the same reference numerals as in the previous exemplary embodiments, and the above description applies analogously.
  • the hydraulic power amplifier 38 is also arranged below the fixed clamping jaw 2 in the base body 1.
  • the abutment 9 is provided in an abutment bushing 10 which is inserted into a through bore 11 of the base body 1.
  • the secondary piston 39 of the booster 38 is slidably mounted.
  • the free end of the push rod preferably forms the primary piston 40, or it acts on the primary piston.
  • a hollow connecting part 41 which concentrically surrounds the primary piston 40 and via which the secondary piston 39 is connected in a tensile manner to the end 7a.
  • the interior 41 a of the connecting part 41 filled with hydraulic fluid is connected via transverse bores 42 to the cylinder space 43 of the secondary piston 39 surrounding it.
  • a common drive device can be used to drive the screw spindle 7 and the pressure rod acting on the primary piston 40 speaking of the common drive device 27, may be provided in the embodiment shown in FIGS. 1 to 3.
  • FIGS. 7 to 13 preferably use a machine vice with the two-part movable clamping jaw 103 in a development of the invention.
  • FIGS. 7 and 8 relate to an exemplary embodiment with a hydraulic power amplifier 38 according to FIG. 6 and a drive device 27 according to FIG. 3.
  • the same reference numerals are used for the same parts and reference is made to the above explanations with regard to the description.
  • FIGS. 7, 8 and 9 show a movable clamping jaw 103 with a configuration according to the invention.
  • the movable clamping jaw 103 has a lower part 104, which has a spindle nut 105 with a relatively short length, and an insert part 112 attached to the spindle nut 105, which is received with play in a recess 110 in an upper part 106 of the movable clamping jaw 103.
  • the lower part 104 represents a slide which is moved in the axial direction and takes the upper part 106 with it. It should be noted that the carriage 104 is considerably longer than the spindle nut 105 with a dome-shaped configuration which on the one hand enables retraction via the drive device 27 but on the other hand offers guidance over the entire length.
  • the insert part 112 has play in the radial, but in particular in the axial direction. However, the latter play is non-positively limited, for example by a plate spring assembly 136 or another spring arrangement which is / are inserted in a recess 134 which is incorporated on the end face of the insert part 112 opposite the surface 116.
  • a set screw 132 presses against the plate spring assembly 136, which is guided through a threaded bore 130 which runs in the upper part 106 in the direction of the longitudinal axis of the screw spindle 7 from the outer end face. 12 and 13, recesses 140 are indicated in the upper part 106, in which additional jaws can be inserted in a known manner.
  • FIG. 13 shows the simplest embodiment, in which the two milled surfaces 114, 116 come into contact with one another in the clamped state.
  • one surface could be flat and the other surface curved, for example cylindrical. This results in a line contact between the flat surface and the curved surface. This would reduce the friction between the surfaces.
  • a recess 150 is incorporated in the surface 114 of the insert part 112, into which an insert body 152, preferably made of hardened steel, is inserted, projecting slightly beyond the surface 114.
  • the opposite surface 116 is only milled.
  • the recess 150 and thus the insert body located therein can have the shape of a strip 152 with a semicircular cross section (FIG. 11) or the shape of a hemisphere 152a with a corresponding recess 150a (FIG. 10) .
  • FIGS. 10 and 11 the recess 150 and thus the insert body located therein can have the shape of a strip 152 with a semicircular cross section (FIG. 11) or the shape of a hemisphere 152a with a corresponding recess 150a (FIG. 10) .
  • FIG. 11 the tensioned state, there is again a flat contact of the surface 114 on the flat surface of the insert body 152 or 152a.
  • a third alternative would be to design the insert body as a solid ball in the recess 150a in FIG. 10, but an extremely high surface pressure would result in the tensioned state due to the only punctiform contact.
  • the movable insert body compensates for lateral angular errors in the guide, upper and lower part.
  • the movable clamping jaw 103 is guided on a surface 160 which extends horizontally along the upper side of the base body 101 and on which a lower horizontal surface 162 of the upper part 106 rests (cf. 9).
  • Additional horizontal guides are arranged between webs 165 with an approximately rectangular shape that project laterally on the underside of the lower part 104 and complementary guide grooves 167 in the base body 101, which are guided horizontally above and below, on lower surfaces 172, 174 and upper surfaces 164, 166.
  • the slide 104 of the lower part moves against the workpiece via the thread of the screw spindle 7. Carried over the inclined surfaces 114/116 between the slide 104 and the upper part 106, the upper part 106 moves on the guide surfaces 160 against the workpiece.
  • the resilient elements namely the plate spring assembly 136, result in a pretensioning force which presses the upper part 106 flat against the guideways 160 even before tensioning. This largely eliminates the play between the upper part and the guideway.
  • the carriage 104 runs with an upper and lower guide 164/166 and 172/174 in the interior of the base body 101. Since the accuracy of the guide is determined by the ground surfaces of the guide track 160 and the underside 162 of the upper part 106, the guides 164 / 166 or 172/174 should not be ground inside the body 101.
  • the perpendicularity of the arrangement is determined by the fact that the vertical end edges of the guideways 168, 170 of the slide 104 or of the base body 101 are ground.
  • the coupling 32, 33, 34 (FIG. 3) of the screw spindle 7 disengages, and the power amplifier is actuated via the axial rod 18.
  • the power amplifier is supported against the head part of the base body 101 and pulls the screw spindle 7 forward.
  • the support prevents the head part from deforming.
  • the base body 101 is largely relieved of the clamping forces.
  • the movable clamping jaw 103 is pulled into the clamping position via the thread of the tension spindle 7.
  • the oblique contact surfaces 114/116 result in a horizontal force component, which clamps the workpiece, and a vertical component.
  • the angle of the surfaces 114/116 to the longitudinal axis of the screw spindle 7 is chosen so that the vertical component is so large that the upper part 106 is pressed down over its entire length.
  • the top part 106 is tensioned against the guideways 160 by the plate spring assembly 136, there is only a tensioning movement forwards, but no upward or downward movement, i. H. there is no canting of the upper part 106, which could move the workpiece.
  • the plate spring assembly 136 does the opposite.
  • the slide 104 is tilted slightly until the lower outer edge is supported against the lower guide 172 in the base body 101 and the upper inner edge against the upper surface of the guide 164.
  • the angle of the inclined surfaces 114/116 is selected at 45 ° , which leads to high friction losses.
  • the special guide for the slide 104 it is possible due to the special guide for the slide 104 to remain in the order of 65 to 70 with respect to the longitudinal axis of the screw spindle 7 and to reduce the friction considerably.
  • the design according to the invention of the movable clamping jaw 103 and its arrangement in the machine vice can also be used with advantage in the most varied of embodiments, which are not restricted to the embodiments according to FIGS. 1 to 6.
  • use in an arrangement with a pressure spindle is possible in an analogous manner.
  • the screw spindle 7 according to FIGS. 7 and 8 is provided with a covering 180 in the region between the clamping jaws to protect the screw spindle 7 against contamination hen.
  • the envelope 180 is flexible in length. It could be designed as a bellows. Shown is a sheath 180 which can be telescopically pushed together, since it is composed either in the form of a spiral leaf spring or from cylindrical, tubular parts.
  • the casing 180 is held, for example, at one end via a socket 182 on the end face of the spindle nut 105 and, at the other end, is drawn onto a tubular connection piece 184 of the power amplifier 38.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Claims (15)

1. Etau pour machine comprenant un bâti (1 ; 101) qui porte une mâchoire fixe (2) à l'une de ses extrémités et sur lequel est montée une mâchoire mobile (3 ; 103), une broche filetée (7) qui vient en prise avec un écrou de broche (5 ; 105) relié à la mâchoire mobile (3 ; 103), un amplificateur de force (8 ; 38) qui agit sur la broche filetée (7) et qui s'appuie sur le bâti, et un dispositif d'entraînement commun (27) qui est destiné à la broche filetée (7) et à l'amplificateur de force (8 ; 38), ce dernier étant disposé dans le bâti (1 ; 101), au-dessous de la mâchoire fixe (2), caractérisé par le fait que :
- la broche filetée (7) est réalisée sous la forme d'une broche creuse dans laquelle peut coulisser une tige de poussée (18 ; 50) sur l'une des extrémités de laquelle agit le dispositif d'entraînement (27) et dont l'autre extrémité agit sur l'amplificateur de force (8 ; 38),
l'amplificateur de force (8 ; 38) est relié par l'intermédiaire d'une liaison en traction (21, 23 ; 35) à l'extrémité de la broche filetée (7) qui en est voisine, et :
- le dispositif d'entraînement commun (27) est disposé pour l'essentiel à l'intérieur du bâti (1 ; 101), et il se trouve au-dessous de la mâchoire mobile (3 ; 103) lorsque celle-ci est dans sa position où elle est complètement ouverte.
2. Etau pour machine selon la revendication 1, caractérisé par le fait que l'amplificateur de force (8) est mécanique et qu'il comporte un organe primaire (16) et un organe secondaire (17) qui se déplace dans la même direction et qui s'appuie sur une contre-butée (9, 10), celle-ci étant fixe par rapport au bâti (1), par le fait que le dispositif d'entraînement commun (27) comprend un manchon fileté (30) qui est relié à la broche filetée (7) d'une manière solidaire en rotation, une broche d'entraînement (31) qui agit sur l'organe primaire de l'amplificateur de force (8) et un accouplement de transmission des couples (32, 33, 34) qui est prévu entre cette broche et le manchon fileté (30), par le fait que la broche d'entraînement (31) agit sur la tige de poussée (18) dont l'autre extrémité appuie sur l'organe primaire (16) de l'amplificateur de force (8), et par le fait que l'organe secondaire (17) est relié d'une manière rigide à la traction dans le sens axial, mais mobile en rotation, à l'extrémité (7a) de la broche filetée (7) qui est voisine de la mâchoire fixe (2), et ce, par l'intermédiaire de la liaison en traction (21, 23 ; 35) qui passe devant lui extérieurement et à travers la contre-butée (9, 10).
3. Etau pour machine selon la revendication 1, caractérisé par le fait que l'amplificateur de force (38) est hydraulique, et qu'il comporte un piston primaire (40), ainsi qu'un piston secondaire (39) qui se déplace dans la même direction, par le fait que l'amplificateur de force (38) s'appuie sur une contre-butée (9, 10) qui est fixe par rapport au bâti (1), par le fait que le dispositif d'entraînement (27) agit sur l'une des extrémités de la tige de poussée (18, 50), tandis l'autre extrémité de cette dernière agit sur le piston primaire (40) de l'amplificateur de force (38) ou constitue le piston primaire (40), par le fait que le piston secondaire (39) est relié, d'une manière rigide à la traction dans le sens axial, à l'extrémité (7a) de la broche filetée (7) qui est voisine de la mâchoire fixe (2), et ce, par l'intermédiaire d'une pièce de liaison creuse (41) qui entoure le piston primaire (40) d'une manière coaxiale et qui passe à travers la contre-butée (9, 10), et par le fait que le volume intérieur (41a) de la pièce de liaison (41) qui est rempli de fluide hydraulique est en communication, par l'intermédiaire d'au moins un perçage transversal (42), avec le volume du cylindre (43) du piston secondaire (39) qui l'entoure.
4. Etau pour machine selon la revendication 2 ou 3, caractérisé par le fait que la contre-butée (9) comporte une douille de contre-butée (10) qui est insérée dans un perçage traversant cylindrique correspondant (11) ménagé dans le bâti (1) et qui présente, à son extrémité opposée à la broche filetée (7), une bride (12) par laquelle elle s'appuie sur un épaulement annulaire (13) raccordé au perçage traversant (11), cependant que la douille de contre-butée (10) s'étend de préférence, par son extrémité (10a) qui est tournée vers la broche filetée (7), au moins jusqu'à l'extrémité (2a) de la mâchoire fixe (2) qui est tournée vers la broche filetée (7), et cependant que, de préférence, la douille de contre-butée (10) est fermée par un couvercle (14) en forme de pot à son extrémité opposée à la broche filetée (7), un ressort de compression (20) étant disposé entre le couvercle (14) et l'organe secondaire (17) ou le piston secondaire (39), respectivement.
5. Etau pour machine selon l'une des revendications précédentes, caractérisé par le fait que la liaison en traction comporte un manchon de traction (21) qui est disposé d'une manière coaxiale à l'intérieur de la douille de contre-butée (10) en pouvant coulisser axialement, qui entoure l'amplificateur de force (8), sur l'une des extrémités duquel l'organe secondaire (17) de l'amplificateur de force s'appuie et dont l'autre extrémité comporte au moins deux pattes de traction (23), celles-ci étant dirigées axialement, s'étendant à travers des évidements axiaux (24) ménagés dans la douille de contre-butée (10) et venant en prise par l'arrière avec une bride (25) prévue à l'extrémité (7a) de la broche filetée (7), et ce, au moyen de griffes (23a) qui sont prévues à leur extrémité et qui sont dirigées vers l'intérieur dans le sens radial, cependant que, de préférence, le manchon de traction (21) est fermé par un couvercle à vis (22) à son extrémité opposée à la broche filetée (7) et que l'organe secondaire (17) s'appuie sur le côté intérieur de ce couvercle à vis (22).
6. Etau pour machine selon l'une des revendications 1 à 4, caractérisé par le fait que la liaison en traction comporte au moins deux goujons de traction (35) qui sont dirigés axialement et qui s'étendent à travers des perçages (36) dirigés axialement de la contre-butée (9) ou du bâti (1), respectivement, et par le fait que les goujons de traction (35) sont reliés chacun à un disque (17a) qui porte l'organe secondaire (17) et à une couronne (37) qui entoure l'extrémité (7a) de la broche filetée (7) et qui vient en prise par l'arrière avec une bride (25) prévue à l'extrémité (7a) de la broche filetée (7).
7. Etau pour machine selon l'une des revendications précédentes, caractérisé par le fait que le dispositif d'entraînement commun (27) comporte un boîtier cylindrique (28) qui entoure la broche d'entraînement (31), l'accouplement de transmission des couples (32 à 34) et le manchon fileté (30) dont l'une des extrémités (28a), tournée vers la broche filetée (7), est reliée à la broche filetée (7) d'une manière solidaire en rotation, mais en pouvant coulisser dans le sens axial, et ce, par l'intermédiaire d'une liaison par conjugaison des formes (7b, 28c), et dont l'autre extrémité (28b) est montée, d'une manière tournante et sans pouvoir coulisser dans le sens axial, dans une plaque de retenue (29) qui est reliée au bâti (1).
8. Etau pour machine selon l'une des revendications précédentes, caractérisé par le fait que l'écrou (105) de la broche est monté sur la mâchoire mobile (103) qui est guidée sur le bâti (101), au-dessous de l'extrémité de celle-ci qui est tournée vers l'intérieur de l'étau pour machine, qu'il est nettement plus court que la mâchoire mobile (103), que la mâchoire mobile (103) est divisée en une partie inférieure (104) en forme de chariot, laquelle comporte l'écrou (105) de la broche et une partie à insérer (112), et une partie supérieure (106) présentant un évidement (110) qui est destiné à recevoir la partie à insérer (112) et qui est complémentaire de celle-ci, qu'une surface oblique (114) est formée dans l'évidement (110) sur le côté qui est tourné vers l'intérieur de l'étau en formant avec l'axe longitudinal de la broche filetée (7) un angle compris entre 55 ° et 800, et de préférence entre 60 ° et 70°, une surface (116) de la partie à insérer (112) complémentaire de celle-ci lui faisant face, et que la partie inférieure (104) en forme de chariot est guidée par-dessus et par-dessous dans le bâti (101), pour l'essentiel sur toute sa longueur, en vue d'un déplacement dans la direction de l'axe longitudinal de la broche filetée (7).
9. Etau pour machine selon la revendication 8, caractérisé par le fait que la surface complémentaire (116) de la partie à insérer (112) est formée sur un corps à insérer (152 ; 152a) qui est placé dans un renfoncement (150 ; 150a) de cette partie en faisant légèrement saillie au-delà de la surface complémentaire (116), le corps à insérer (152) et le renfoncement (150) présentant la forme d'une baguette à section transversale en demi-cercle ou étant conformés en demisphère.
10. Etau pour machine selon la revendication 8 ou 9, caractérisé par des moyens élastiques (136) qui poussent la partie à insérer (112) dans la direction de la surface oblique (114), cependant que, de préférence, les moyens élastiques sont constitués par un empilement de rondelles élastiques (136), celui-ci étant inséré dans le côté frontal de la partie à insérer (112) qui est opposé à la surface complémentaire (116) et s'appuyant sur un élément (132) qui fait saillie au-delà de la surface opposée de l'évidement (110).
11. Etau pour machine selon l'une des revendications 8 à 10, caractérisé par le fait que la partie inférieure (104) en forme de chariot est pourvue de barres (165) qui font saillie latéralement, dont la section transversale est principalement rectangulaire et qui sont guidées dans des rainures de guidage (167), celles-ci étant ménagées dans le bâti (101) en étant complémentaires de ces barres.
12. Etau pour machine selon l'une des revendications 8 à 11, caractérisé par le fait que la partie inférieure (104) en forme de chariot présente des surfaces longitudinales verticales (168), celles-ci glissant sur des surfaces (170) du bâti (101) qui en sont complémentaires dans le sens longitudinal en vue du guidage latéral.
13. Etau pour machine selon l'une des revendications précédentes, caractérisé par le fait que la broche filetée (7) est entourée par un dispositif de protection (180) dont la longueur est variable et qui est réalisé de préférence à la manière d'un soufflet, sous une forme télescopique ou sous la forme d'une lame de ressort hélicoïdale.
14. Etau pour machine selon l'une des revendications 8 à 13, caractérisé par le fait que la broche filetée (7) est réalisée sous la forme d'une broche de traction.
15. Etau pour machine selon l'une des revendications 8 à 13, caractérisé par le fait que la broche filetée (7) est réalisée sous la forme d'une broche de compression.
EP91108333A 1990-06-07 1991-05-23 Etau de machines Expired - Lifetime EP0460457B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4018194 1990-06-07
DE19904018194 DE4018194C1 (en) 1990-06-07 1990-06-07 Vice with fixed and moving jaw - has spindle for movement of intensifier which thrusts against vice base part
DE4112418A DE4112418A1 (de) 1990-06-07 1991-04-16 Maschinenschraubstock
DE4112418 1991-04-16

Publications (4)

Publication Number Publication Date
EP0460457A2 EP0460457A2 (fr) 1991-12-11
EP0460457A3 EP0460457A3 (en) 1992-04-01
EP0460457B1 true EP0460457B1 (fr) 1995-03-15
EP0460457B2 EP0460457B2 (fr) 2000-03-01

Family

ID=25893917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108333A Expired - Lifetime EP0460457B2 (fr) 1990-06-07 1991-05-23 Etau de machines

Country Status (5)

Country Link
US (1) US5251887A (fr)
EP (1) EP0460457B2 (fr)
JP (1) JP3286791B2 (fr)
DE (2) DE4112418A1 (fr)
ES (1) ES2073065T5 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP2978942A1 (fr) * 2013-03-28 2016-02-03 ABB Turbo Systems AG Chariot à poutre en porte-à-faux pour le montage et le démontage d'un bloc de rotor

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US5662316A (en) * 1993-07-22 1997-09-02 Automation Enhancements Un Limited Pallet couple and decouple clamping apparatus and method for pallet coupling and decoupling
HRP980211B1 (en) * 1998-04-17 2002-08-31 Jurković Rudolf Universal vice comprising a selfadjustable slider
KR100406462B1 (ko) * 2002-01-15 2003-11-21 주식회사 삼천리기계 바이스용 증력장치
SE525190C2 (sv) * 2003-04-15 2004-12-21 Sandvik Ab Gasfjäder med dragstång i två stycken
SE526258C2 (sv) * 2003-04-15 2005-08-09 Sandvik Intellectual Property Kraftförstärkare för maskinspindel med samverkande kilar
EP1688219B1 (fr) * 2005-06-15 2006-11-15 HB-Feinmechanik GmbH & Co.KG Dispositif de serrage avec élément de couverture pour l'évidement contenant sa broche
EP1797996A1 (fr) * 2005-12-19 2007-06-20 ALLMATIC-Jakob Spannsysteme GmbH Etau avec amplificateur de force
US9227303B1 (en) 2006-09-01 2016-01-05 Chick Workholding Solutions, Inc. Workholding apparatus
US8336867B1 (en) 2006-09-01 2012-12-25 Chick Workholding Solutions, Inc. Workholding apparatus having a detachable jaw plate
US8454004B1 (en) 2006-09-01 2013-06-04 Chick Workholding Solutions, Inc. Workholding apparatus having a movable jaw member
US8109494B1 (en) * 2006-09-01 2012-02-07 Chick Workholding Solutions, Inc. Workholding apparatus having a movable jaw member
US8573578B1 (en) 2006-09-01 2013-11-05 Chick Workholding Solutions, Inc. Workholding apparatus
US8690138B2 (en) * 2010-12-29 2014-04-08 Tseh-Pei LIN Coaxial concentric double-jaw vice
CN102789436B (zh) * 2011-05-18 2014-12-31 国基电子（上海）有限公司 单线双向通信的主从芯片及其方法
US9352451B1 (en) 2013-05-02 2016-05-31 Chick Workholding Solutions, Inc. Workholding apparatus
AT517201A1 (de) * 2015-05-05 2016-11-15 Johann Schachinger Keilspannschraubstock
TWI579108B (zh) * 2016-04-21 2017-04-21 Improvement of Pressure Regulating Structure of
AT523492B1 (de) 2020-01-31 2022-04-15 Cutpack Com Gmbh Spannvorrichtung zum Einspannen eines Werkstücks

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2978942A1 (fr) * 2013-03-28 2016-02-03 ABB Turbo Systems AG Chariot à poutre en porte-à-faux pour le montage et le démontage d'un bloc de rotor
EP2978942B1 (fr) * 2013-03-28 2025-02-19 Accelleron Switzerland Ltd. Chariot de support cantilever pour montage et démontage d'un bloc rotor

Also Published As

Publication number Publication date
DE59104937D1 (de) 1995-04-20
DE4112418A1 (de) 1992-10-22
JPH06344268A (ja) 1994-12-20
JP3286791B2 (ja) 2002-05-27
EP0460457A3 (en) 1992-04-01
ES2073065T5 (es) 2000-07-16
US5251887A (en) 1993-10-12
ES2073065T3 (es) 1995-08-01
EP0460457A2 (fr) 1991-12-11
EP0460457B2 (fr) 2000-03-01

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