EP1333961A1 - Pneumatic vice with hydraulic force amplifier - Google Patents
Pneumatic vice with hydraulic force amplifierInfo
- Publication number
- EP1333961A1 EP1333961A1 EP00973341A EP00973341A EP1333961A1 EP 1333961 A1 EP1333961 A1 EP 1333961A1 EP 00973341 A EP00973341 A EP 00973341A EP 00973341 A EP00973341 A EP 00973341A EP 1333961 A1 EP1333961 A1 EP 1333961A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vise
- piston
- hydraulic
- stud
- pneumatic
- 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
Links
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
Definitions
- the invention relates to a vise operated by compressed air as a transmitter of an input pressure force and hydraulic oil as means for amplifying same, with a respective assembly for amplifying the input pressure force residing within an area of a stationary vise jaw.
- a pneumatic/hydraulic assembly (PHA) as a unit for amplifying an input pressure force provides a pneumatic piston, whose power stroke is directed against the power stroke of a shiftable vise jaw, and a hydraulic piston, whose power stroke is synchronous and coinciding with the power stroke of said shiftable vise jaw.
- said pneumatic section and said hydraulic section of the assembly for amplifying the input force of the vise are united to a single construction.
- a shaft piston is added to said pneumatic piston on the side opposite to the working face thereof, the shaft piston being preferably integral with the pneumatic piston.
- a force generated by compressed air on the pneumatic piston i.e. a piston of a greater working area, is thus exerted by this piston by means of a piston providing a smaller working area.
- a vise stud is added to said hydraulic piston on the side oriented to the shiftable vise jaw, said vise stud being preferably integral with the hydraulic piston.
- the vise stud is a member of the vise for conveying the force of said hydraulic piston to a vise spindle.
- Said hydraulic piston provides an axial central hole on its side oriented to said shaft piston, said axial central hole extending, by an appropriately enlarged diameter, into the area of the vise stud to form a cylindrical hydraulic chamber.
- At least two traverse passages for conveying hydraulic oil are foreseen in the respective wall sections of the vise stud and the hydraulic piston between said cylindrical hydraulic chamber and an outer annular corner created by the vise stud and the hydraulic piston.
- An axial passage is foreseen in the pneumatic piston and shaft piston, said passage being releasably sealed on the pneumatic-piston side, suitably by a screw plug.
- Said shaft piston cooperates with said central axial hole and said hydraulic chamber of the hydraulic piston/vise stud, respectively.
- Said passage of the shaft piston, the hydraulic chamber of the hydraulic piston/vise stud, said traverse passages and a chamber of the PHA created on the working side of the hydraulic piston are filled up with a hydraulic oil, which, in this position, constitutes a constructional member of the vise.
- a pressure spring is inserted between the pneumatic piston and the hydraulic piston, which works as a return spring when compressed air has been released.
- Said vise spindle is mounted onto the vise stud preserving the freedom of rotation.
- An outer end of the vise spindle is constructed (in a known manner) as a drum-shaped knob that creates, on its outer mantle surface and in combination with the vise spindle, an annular shoulder for retaining a supporting pressure spring accommodated in a (known) vise yoke and, on its inner mantle surface, an annular shoulder for taking up the axial pressure force of the vise stud.
- the vise comprises a vise bed 1 with its outer design being substantially a parallelepiped block, basically of a channel section, whose side pieces (stands) support, at one end of said block, a stationary vise jaw 2, said stationary vise jaw 2 being suitably connected with said side pieces of the vise bed 1 to constitute an interconnection thereof.
- the remaining portion of the upper surface of said vise bed side pieces carries a shiftable vise jaw 3 also guided thereby when moving.
- a pneumatic/hydraulic vise assembly (PHA) 4 is inserted into the cavity of the profiled vise bed 1 co-axially with it and fastened to it in a manner disclosed below.
- the PHA 4 consists of a housing 5, whose cross section is suitably, not obligatorily, designed in conformity with the cavity of the vise bed 1 into which it is incorporated.
- the housing 5 is a sleeve-type member having a (profiled) outer mantle surface and a stepped cylindrical inner cavity comprising a chamber 6, suitably of a larger diameter, and a further chamber 7 connected thereto, suitably of a smaller diameter.
- the housing 5 is oriented to provide an orifice of the chamber 6 open in the direction of the nearest end of the profiled vise bed 1.
- the housing 5 provides a bottom member 8 constituting a closing wall of the chamber 7. In the bottom member 8 a passage 9 is foreseen.
- a vise stud 10 is inserted into the passage 9 of the bottom member 8 of the housing 5, constituting a central element of the vise for interconnecting the PHA 4 and the shiftable vise jaw 3.
- a piston 11 is inserted into the chamber 7. With respect to the bottom member 8 of the housing 5 of the PHA 4, the piston 11 determines a hydraulic working chamber 7a.
- the vise stud 10 and the piston 11 are suitably, not obligatorily, united to one element.
- the piston 11 provides a central axial hole 12, which is enlarged, on the side of the vise stud 10, to form a chamber 13 extending into the area of the vise stud 10 and annexed to the hole 12.
- two or more substantially radial passages 14 are foreseen for interconnecting the chamber 13 and the mantle surface of the vise stud 10/piston 11 tandem member, suitably at the location of their meeting line i.e. in the annular corner. Thereby a communication between the chambers 7a, 13 is provided.
- a shaft piston 15 is inserted into the hole 12 of the piston 11. Due to circumstances explained below, the shaft piston 15 is hollow so that it is basically a tube. Into the chamber 6 a disc-shaped piston 16 is inserted, which is centrally holed as well. Suitably, not obligatorily, the shaft piston 15 and the discshaped piston 16 are united to an element as shown and provide a common central passage 17. An orifice of the passage 17 residing on the outer side of the piston 16 is sealed - in the given embodiment - by a screwed plug 18.
- the chamber 6 is sealed by a cover 20.
- the piston 16 defines a pneumatic working chamber 6a.
- the PHA 4 is fastened to the vise bed 1 by means of the cover 20, which is, to this end, suitably fastened to the front of profiled bed 1 with the contours of said bed and said cover corresponding to each other.
- the cover 20 provides a central threaded hole 21.
- a ventilating hole 6b for the chamber 6 is foreseen near the meeting point of the chambers 6, 7.
- a vise yoke 22 is incorporated between the side pieces (stands) of the bed profile.
- the yoke 22 provides a central axial hole 23 extending over a minor axial portion of the yoke and a central axial bearing 24 extending over a major axial portion of the yoke.
- the axial dimension of the vise stud 10 is sufficient for it to extend through the yoke 22. A significant clearance exists between the outer mantle surface of the vise stud 10 and the hole 23 of the yoke 22.
- a tubular vise spindle 25 is put on the vise stud 10, the wall thickness of said spindle being adapted to the size of the above-mentioned significant clearance.
- the vise spindle 25 provides an outer thread co-operating with an internal thread of a carrier 26 of the shiftable vise jaw 3.
- the vise spindle 25 is flangedly widened to have the diameter of the bearing 24 so that between said flanged widening of the spindle 25 and the bottom member of the bearing 24 there exists an annular axial space occupied by an expanding i.e. pressure spring 27 being inserted therein. Between the spring 27 (being an element stationary with respect to rotation) and the flanged widening of the spindle 25 (rotary element) a thrust bearing is suitably inserted.
- the vise stud 10 terminates by a cylindrical prolongation member for the accommodation of a ring-type spacer 28 and by a threaded prolongation member to mount a screw nut 29.
- the outer diameter of the spacer 28 exceeds the diameter of the vise stud 10 so that the latter and the spacer 28 together create a chamber for accommodating a thrust bearing separating the vise stud 10 (stationary with respect to rotation) from the (rotary) spindle 25.
- the spindle 25 terminates by a drum-shaped knob 30.
- a charge of hydraulic oil not specifically shown in the drawing constitutes a constituent member of the proposed vise.
- the chamber 7a, the passages 14, the chamber 13 and the chamber 17 are filled up with hydraulic oil.
- a compressed air supply provided with a two-position ON/OFF controller (not shown) known per se.
- the carrier 26 of the shiftable vise jaw 3 is shifted along the spindle 25 either in one or in another direction with respect to the stationary vise jaw 2, thus adjusting the vise clearance A for applying a workpiece.
- a working stroke B of the shiftable vise jaw 3. For spanning the workpiece in the vise there is foreseen a working stroke B of the shiftable vise jaw 3.
- the extension (A - B) is the spanning extension of the workpiece.
- the vise stud 10 Since the vise stud 10 is connected to the piston 11, it moves together with it. At the same time, by means of the respective thrust bearing, the spacer 28 pushes the spindle 25 in front of itself, the spindle 25 towing the carrier 26 suspended onto it and thereby the shiftable vise jaw 3 annexed to it. The movement of thespindle 25 is accompanied by the compressing of the pressure spring 27 within the yoke 22.
- the input force of the vise is the force of compressed air acting on the piston 16.
- the force of the piston 16 equals the force of the piston 15 compressing hydraulic oil in the chamber 13.
- oil pressure is also set up in the chamber 7a where oil acts onto the piston 11.
- the ratio of the working areas of the pistons 11, 15 and of the strokes of the pistons 15, 11 is a multiplier of the input vise force.
- the extent of the spanning force depends on the maximum allowable elastic strain of the workpiece.
- the extent of the working stroke of the vise jaw 3 i.e. the dimension of B is adapted thereto.
- a state providing a total compression of one of the springs 19, 27 is prevented by a pre-defined space between the inner base area of the spindle 25 and the opposed base area of the bottom member 8 of the housing 5 of the PHA 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Jigs For Machine Tools (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Fluid-Pressure Circuits (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/SI2000/000024 WO2002038340A1 (en) | 2000-11-09 | 2000-11-09 | Pneumatic vise with hydraulic force amplifier |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1333961A1 true EP1333961A1 (en) | 2003-08-13 |
EP1333961B1 EP1333961B1 (en) | 2006-06-14 |
Family
ID=20430905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00973341A Expired - Lifetime EP1333961B1 (en) | 2000-11-09 | 2000-11-09 | Pneumatic vice with hydraulic force amplifier |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1333961B1 (en) |
AT (1) | ATE329731T1 (en) |
AU (1) | AU2001211861A1 (en) |
DE (1) | DE60028836T2 (en) |
DK (1) | DK1333961T3 (en) |
ES (1) | ES2265995T3 (en) |
HK (1) | HK1059597A1 (en) |
PT (1) | PT1333961E (en) |
WO (1) | WO2002038340A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2581170B1 (en) * | 2011-10-13 | 2020-04-29 | PHD, Inc. | Gripper with force-multiplying mechanism |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1618995A1 (en) * | 2004-07-24 | 2006-01-25 | ALBERT SCHREM WERKZEUGFABRIK GmbH | Hydraulic pressure cartridge |
ES2336169B8 (en) * | 2007-07-25 | 2011-07-28 | Fresmak, S.A. | CLAMP FOR MACHINING CENTER. |
TWI511844B (en) * | 2012-05-09 | 2015-12-11 | Ruey Teng Chen | Quick clamping mechanism |
TW201702006A (en) * | 2015-07-03 | 2017-01-16 | Homge Machinery Industrial Co Ltd | Improved structure of air pressure angle-fixed vise has a better waterproof function without deformation since both ends of the guide screw are supported with a very strong supporting force |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB972119A (en) * | 1962-10-02 | 1964-10-07 | Edouard Martin Torossian | Mechanical hydraulic vice with double control |
FR1359934A (en) * | 1963-03-27 | 1964-04-30 | Hydropneumatic autotransformer intended in particular for tightening tools | |
CH412745A (en) * | 1965-01-08 | 1966-04-30 | Torossian Edouard | Hydropneumatic control device for bench vise |
FR2348787A1 (en) * | 1976-04-23 | 1977-11-18 | Letestu Claude | Vice for machine tool - has hydraulic cylinder and vice actuated by pneumatic piston and tightened by second pneumatic cylinder |
-
2000
- 2000-11-09 EP EP00973341A patent/EP1333961B1/en not_active Expired - Lifetime
- 2000-11-09 DK DK00973341T patent/DK1333961T3/en active
- 2000-11-09 DE DE60028836T patent/DE60028836T2/en not_active Expired - Lifetime
- 2000-11-09 AT AT00973341T patent/ATE329731T1/en active
- 2000-11-09 ES ES00973341T patent/ES2265995T3/en not_active Expired - Lifetime
- 2000-11-09 WO PCT/SI2000/000024 patent/WO2002038340A1/en active IP Right Grant
- 2000-11-09 PT PT00973341T patent/PT1333961E/en unknown
- 2000-11-09 AU AU2001211861A patent/AU2001211861A1/en not_active Abandoned
-
2004
- 2004-02-13 HK HK04101052A patent/HK1059597A1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0238340A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2581170B1 (en) * | 2011-10-13 | 2020-04-29 | PHD, Inc. | Gripper with force-multiplying mechanism |
Also Published As
Publication number | Publication date |
---|---|
DE60028836T2 (en) | 2007-01-18 |
ATE329731T1 (en) | 2006-07-15 |
PT1333961E (en) | 2006-10-31 |
ES2265995T3 (en) | 2007-03-01 |
HK1059597A1 (en) | 2004-07-09 |
WO2002038340A1 (en) | 2002-05-16 |
DE60028836D1 (en) | 2006-07-27 |
DK1333961T3 (en) | 2006-10-09 |
EP1333961B1 (en) | 2006-06-14 |
AU2001211861A1 (en) | 2002-05-21 |
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