EP0763400A1 - Dispositif de serrage - Google Patents

Dispositif de serrage Download PDF

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Publication number
EP0763400A1
EP0763400A1 EP96113295A EP96113295A EP0763400A1 EP 0763400 A1 EP0763400 A1 EP 0763400A1 EP 96113295 A EP96113295 A EP 96113295A EP 96113295 A EP96113295 A EP 96113295A EP 0763400 A1 EP0763400 A1 EP 0763400A1
Authority
EP
European Patent Office
Prior art keywords
clamping
lever
piston
tensioning
pressure
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
EP96113295A
Other languages
German (de)
English (en)
Other versions
EP0763400B1 (fr
Inventor
Rudolf Kohlert
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
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
Publication of EP0763400A1 publication Critical patent/EP0763400A1/fr
Application granted granted Critical
Publication of EP0763400B1 publication Critical patent/EP0763400B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction

Definitions

  • the invention relates to a clamping element for clamping workpieces, tools or molds on machine tables, devices or pallets by means of a clamping lever which is moved over the workpiece and then pressed approximately perpendicularly onto the workpiece.
  • Tensioning levers which are part of a device, are generally used for tensioning. Such devices should be kept as small as possible and take up little space on pallets and the like. Nor should they interfere with the workflow.
  • the pneumatic pressure now causes the piston to continue to move against the spring force and to slide further over the tensioning arm with its slanted inner cylinder.
  • the tension arm is connected to the spring guide part via a cardan shaft. Through the oblique bore in the piston, the pressure arm in the area of its cardan shaft is pressed upwards and rotated around the center of the ball when pressure is still present. The clamping head of the clamping arm is pressed onto the workpiece by this movement.
  • Such a clamping device requires a relatively long piston stroke. This requires a long construction.
  • the spring in between reduces the force generated by the air, which means a small clamping force on the lever.
  • the advantage of the invention is due to the omission of the spring in the short design and in that all parts are direct work together.
  • the force acting on the clamping piston is thus transmitted directly to the clamping lever and its clamping head and thus to the workpiece.
  • a hydraulic fluid serves as the pressure medium.
  • a wedge generating a clamping force can be rotated in any direction by an anti-rotation device between the piston and the clamping lever.
  • a tensioning lever 2 and the tensioning piston 3 driving it are mounted in a housing 1 with a cylindrical bore.
  • the clamping lever 2 is guided in a ball bushing 4.
  • This ball bushing 4 is mounted in the form of a shell within the housing 1 and can rotate about the center point within the shell.
  • the clamping lever 2 has at its front end a pressure piece 7, which is placed on the workpiece 19 to be clamped. This pressure piece 7 is screwed to the tensioning lever 2 and can therefore be easily replaced.
  • the tensioning lever 2 is provided with a shoulder 8 which is larger than the inside diameter of the ball bushing 4 and which is arranged in the interior of the tensioning piston 3 behind the ball bushing 4.
  • the ball bushing 4 is provided in its part facing the tensioning piston 3 with an end face 9 which is adapted to the paragraph 8 accordingly.
  • the clamping lever 2 is in the area behind paragraph 8 provided with a constriction 11 and with a slope 26. In the area of the constriction 11, a spherical cap 12 is let into the tensioning lever 2, which receives a pressure bolt 13. This pressure bolt 13 has a flat 14.
  • the tensioning piston 3 comprises the tensioning lever 2 in its rear area, for this purpose it forms a one-sided interior in the form of a blind bore.
  • a wedge 5 is fixedly arranged in its lower region.
  • This wedge 5 has a slope 21 which rises steadily to the inner clamping piston pressure surface.
  • the tensioning lever 2 is adapted in the rear region of this bevel 21 in such a way that the pressure pin 13 with the flat 14 lies exactly on this bevel 21 and slides.
  • a wedge pin 6 is firmly connected to the tensioning piston 3.
  • This wedge pin 6 has a slope 22.
  • the bevel 22 is adapted to the bevel 10 of the tensioning lever 2 in such a way that the bevels 10 and 22 slide on one another and thereby allow the pivoting movement of the tensioning lever 2.
  • This wedge bolt 6 once fulfills the task of guiding the tensioning lever 2 during its movement within the housing 1, so that the tensioning lever 2 is moved by the tensioning piston 3 during the relaxation movement via the slopes 10 and 22 for the relaxation stroke.
  • it fulfills the task of fixing the tension lever 2 within the interior of the tensioning piston and fixing it against rotation.
  • the wedge pin 6 is guided in the slope 10 so that lateral evasion is not possible.
  • the slope 10 is thus part of a groove.
  • a shoulder piece 15 is fixedly connected to the tensioning piston 3 in the interior of the tensioning piston.
  • This shoulder piece 15 has a counterpart, namely the cams 16, which in turn are fixedly arranged on the tensioning lever 2.
  • This shoulder piece 15 after contacting the cams 16, an adjacent connection between Tension lever 2 and the tensioning piston 3 are produced, by means of which entrainment into the relaxed position is achieved.
  • the tensioning lever 2 In the relaxed state (FIG. 4), the tensioning lever 2 is moved into the housing 1. This is done by building up pressure in the pressure chamber 18, so that a force acts on the tensioning lever 2 in the region of the pressure chamber 18 on its right end face effective in the pressure chamber. By this pressure, the clamping lever 2 is pressed with its shoulder 8 against the end face 9 of the ball bushing 4 and remains in this position until the clamping piston 3 has traveled a certain distance in the direction away from the clamping lever 2. The movement of the tensioning piston 3 is also initiated by the pressure built up in chamber 18, in which it affects the inner pressure surface of the tensioning piston 3. The tensioning lever and tensioning piston initially move away from each other. During this movement phase, the pressure pin 13 slides downward on the wedge 5 with its flattened portion 14.
  • the clamping lever 2 thus executes a rotary movement about the center point M with the ball bushing 4, with which the pressure piece 7 lifts off the workpiece 19. So that when the tensioning lever 2 is loosened, the wedge pin 6 acts on the bevel 10 via its bevel 22 and thus supports the initiation of the rotary movement.
  • the tensioning piston 3 slides away from the tensioning lever 2 until it strikes the cams 16 with its shoulder piece 15. Now the tensioning lever 2 is carried in its raised position by the tensioning piston 3 and moves into the relaxation position. Here, the pressure piece 7 is almost in the housing 1. The workpiece 19 can now be removed.
  • Clamping lever 2 strikes the end face 9 of the ball bushing 4.
  • the clamping lever 2 thus comes to a standstill while the clamping piston 3 continues to move in the direction of the workpiece 19.
  • the pressure pin 13 slides with its flat 14 on the wedge 5 upwards and causes the clamping movement to be initiated on the workpiece 19.
  • the pressure piece 7 is pressed onto the workpiece 19, since the clamping lever 2 now rotates about the center M with the ball bushing 4 to the left below. As soon as the pressure piece 7 is firmly seated on the workpiece 19, the clamping process is complete.
  • the housing 1 is very short, since the interaction of the elements takes place in the smallest space.
  • the sequence of movements for the tensioning lever 2 takes place predominantly inside the tensioning piston 3.
  • This tensioning piston 3 is designed so that its diameter is greater than its length.
  • the pressure piece 7 is used to clamp the workpiece 19.
  • This pressure piece 7 is exchangeable.
  • a screw connection can be used for this serve, with the help of a fastening on the front side of the clamping lever 2 can be made, but it can also be used all other types of fastening.
  • a movable link is also suitable for the pressure piece 7, as shown in FIG. 3.
  • a ball head 23 serves as a pressure piece, which can be freely rotated in a corresponding spherical cap.
  • This ball head 23 is provided with a flat 24.
  • FIG. 5 shows the possibilities of workpiece clamping with the different clamping force directions. These are illustrated by the arrows () in some examples.
  • This is achieved by maintaining a predetermined position for the tensioning lever 2 in the interior of the tensioning piston 3.
  • the wedge 5 and the wedge pin 6 are firmly connected to the tensioning piston 3 and thus fixed in their position.
  • the clamping lever 2 is, as already described, guided with a corresponding groove guide with a slope 10 under the wedge bolts 6 in such a way that it is also fixed in its position with respect to the clamping piston 3.
  • clamping lever 2 and clamping piston 3 carry out all movements around their central axis together.
  • the mounting of the tension lever 2 and tension piston 3 and the ball bushing 4 is, however, free and rotatable within the housing cylinder. This means that all parts within the housing can be rotated together about its central axis.
  • clamping element can be used in all positions, with all-round clamping possible are. This is done by simply turning the clamping head 20 by hand so that the pressure piece 7 can be assigned to any angular position within an imaginary circle.
  • This all-round clamping position has another advantage. If the clamping lever 2 is placed on workpieces whose clamping surface is not completely parallel to the pressure piece 7, the pressure piece 7 automatically adapts to the workpiece. The clamping force ensures that the clamping head is always in the position that is most favorable for the power transmission.
  • the invention provides for the two surfaces 21 and 14 sliding on one another to be provided with grooves and teeth which slide into one another and thus make the friction surface approximately three times as large.
  • Fig. 7 shows the toothed version.
  • longitudinal grooves 27 are introduced in its flattening, in the direction of the sliding movement on bevel 21, thus forming a toothing in the longitudinal direction in the form of toothed ridges 29.
  • longitudinal grooves 28 are also made in the bevel 12. These longitudinal grooves 28 are offset from the longitudinal grooves 27 so that the toothed webs 30 which also form are guided in the longitudinal grooves 27 and the toothed webs 29 in the longitudinal grooves 28 are slidably guided.
  • Wedge 5 and pressure bolt 13 thus slide into one another over their toothed surfaces and carry out a displacement in the longitudinal direction of the movement sequence of the tensioning lever 2.
  • the clamping lever 2 is guided within the housing 1. This guide is supported during the course of movement by the wedge bolt 6, which slides with its bevel 22 on the bevel 10 of the tensioning lever 2. During the relaxation process, this wedge pin 6 also supports the tilting movement of the tensioning lever 2.
  • the surfaces sliding on one another, slope 10 and slope 22, require an exact adjustment. Practice has shown that even better guidance can be achieved if the two surfaces are designed to interlock.
  • the wedge pin 6 is hemispherical in its lower end piece 31.
  • an elongated hole 32 is made in the tensioning lever 2 in the longitudinal direction of the movement sequence. This slot 32 is only inserted into the tensioning lever 2 as far as is necessary to guide this tensioning lever.
  • the bottom of this elongated hole 32 is designed as a non-uniform slideway 33.
  • the shape of this slideway 33 is approximated to a parabola. Their course is determined by the sliding sequence of movements during the tensioning and relaxation of wedge 5 on pressure pin 13.
  • the wedge pin 6 slides with its hemispherical end piece 31 on the slideway 33 within the elongated hole 32.
  • the curve shape of the slideway 33 makes the wedge pin 6 with its hemispherical end piece 31 guided so that the distance between the sliding surfaces 14; 27 and 28 of the pressure pin 13 and the sliding surfaces 21; 28 and 30 of the wedge 5 is constant in each direction of movement. This creates a positive guidance for the tensioning lever 2 during the movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Road Signs Or Road Markings (AREA)
EP96113295A 1995-08-30 1996-08-20 Dispositif de serrage Expired - Lifetime EP0763400B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19531889A DE19531889A1 (de) 1995-08-30 1995-08-30 Spannelement
DE19531889 1995-08-30

Publications (2)

Publication Number Publication Date
EP0763400A1 true EP0763400A1 (fr) 1997-03-19
EP0763400B1 EP0763400B1 (fr) 1999-10-13

Family

ID=7770754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113295A Expired - Lifetime EP0763400B1 (fr) 1995-08-30 1996-08-20 Dispositif de serrage

Country Status (4)

Country Link
US (1) US5746420A (fr)
EP (1) EP0763400B1 (fr)
AT (1) ATE185505T1 (fr)
DE (2) DE19531889A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019100296U1 (de) 2019-01-18 2020-04-23 ALTRATEC Automation GmbH Spannvorrichtung, insbesondere zum Spannen von Werkstücken

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0937538B1 (fr) * 1998-02-18 2003-06-18 Delaware Capital Formation, Inc. Dispositif pneumatique de bridage rétractable à profil bas
DE19918770A1 (de) 1999-04-24 2000-10-26 Roemheld A Gmbh & Co Kg Spannvorrichtung zum Spannen von Werkstücken
KR101038001B1 (ko) * 2004-03-08 2011-05-30 아이신에이더블류 가부시키가이샤 클램프 장치
DE102006042656B4 (de) * 2006-09-12 2010-11-18 Hans-Joachim Bauer Spanneinrichtung mit zurückziehbarem Spannarm
DE102010044327A1 (de) 2010-09-03 2012-03-08 De-Sta-Co Europe Gmbh Zentrierspannvorrichtung
FR2989298B1 (fr) * 2012-04-12 2015-03-13 Christophe Boiteux Dispositif a faible encombrement vertical pour le serrage d'une piece sur un outillage
PL3055104T3 (pl) * 2013-10-07 2019-07-31 Christophe Boiteux Urządzenie niewielkich rozmiarów w pionie do mocowania części na narzędziu
CN104227606B (zh) * 2014-09-12 2016-08-24 苏州博众精工科技有限公司 一种弹性压紧机构
CN108801723B (zh) * 2017-05-03 2022-09-13 徕卡显微系统(上海)有限公司 夹紧装置和具有其的切片机
CN113997094A (zh) * 2021-09-30 2022-02-01 无锡戴卡轮毂制造有限公司 一种随型自修正式的液压锁紧装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1478857A1 (de) * 1965-05-15 1970-01-08 Ludwig Dasser Zwei-Weg-Spannvorrichtung,pneumatisch oder handbetaetigt
EP0213400A2 (fr) * 1985-09-06 1987-03-11 Gebrüder Honsberg GmbH Dispositif de serrage pour pièces de travail

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3595112A (en) * 1969-02-24 1971-07-27 Houdaille Industries Inc Machine-tool clamp assembly
US3578306A (en) * 1969-06-05 1971-05-11 Kenneth C Smith Air pressure operated clamp
US3700227A (en) * 1970-12-09 1972-10-24 Applied Power Ind Inc Traversing workholding clamp
SU1004068A1 (ru) * 1981-09-16 1983-03-15 Московское Специальное Конструкторское Бюро Автоматических Линий И Агрегатных Станков Устройство дл закреплени деталей
US4511127A (en) * 1983-04-18 1985-04-16 Jergens, Inc. Hydraulic-mechanical clamping device
US4506871A (en) * 1983-05-10 1985-03-26 Aioi Seiki Kabushiki Kaisha Retracting clamp
DE3802985A1 (de) * 1987-02-11 1988-08-25 Andreas Maier Gmbh & Co Hydraulisches spannelement
JP2787575B2 (ja) * 1988-07-11 1998-08-20 株式会社コスメック 楔倍力型油圧クランプ
JP2932219B2 (ja) * 1991-04-12 1999-08-09 株式会社コスメック クランプロック装置付き流体圧クランプ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1478857A1 (de) * 1965-05-15 1970-01-08 Ludwig Dasser Zwei-Weg-Spannvorrichtung,pneumatisch oder handbetaetigt
EP0213400A2 (fr) * 1985-09-06 1987-03-11 Gebrüder Honsberg GmbH Dispositif de serrage pour pièces de travail

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019100296U1 (de) 2019-01-18 2020-04-23 ALTRATEC Automation GmbH Spannvorrichtung, insbesondere zum Spannen von Werkstücken

Also Published As

Publication number Publication date
ATE185505T1 (de) 1999-10-15
DE19531889A1 (de) 1997-03-06
EP0763400B1 (fr) 1999-10-13
US5746420A (en) 1998-05-05
DE59603339D1 (de) 1999-11-18

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