EP1068050A1 - Kniehebel-spannvorrichtung - Google Patents
Kniehebel-spannvorrichtungInfo
- Publication number
- EP1068050A1 EP1068050A1 EP99958119A EP99958119A EP1068050A1 EP 1068050 A1 EP1068050 A1 EP 1068050A1 EP 99958119 A EP99958119 A EP 99958119A EP 99958119 A EP99958119 A EP 99958119A EP 1068050 A1 EP1068050 A1 EP 1068050A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- stop surface
- pivot
- bearing head
- clamping device
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008921 facial expression Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B25B5/12—Arrangements for positively actuating jaws using toggle links
- B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive
Definitions
- the invention relates to a toggle lever clamping device, with a bearing head arranged on the end face of an actuating device, on which a swivel unit containing a clamping arm is pivotably mounted about a pivot axis between a release position and a clamping position, with an actuating rod of the actuating device which plunges into the bearing head, and also with a on the one hand via a first bearing point on the actuating rod and on the other hand, at a distance from the pivot axis, via a second bearing point on the pivot unit articulated intermediate member and with a stop surface provided on the bearing head and serving to specify the clamping position of the clamping arm.
- a toggle lever tensioning device of this type can be found in EP 575 888 B1. It has a toggle lever arrangement formed by the swivel unit and the intermediate member, which is activated by the actuating rod of the actuating device mounted on the intermediate member.
- an retracting actuating rod causes it to pivot back into the release position.
- a stationary or adjustable end position stop is provided, which has a stop surface provided on the bearing head, on which the actuating rod impacts at the end when the clamping position is reached. This impact causes a high load on the actuating rod and the piston of the actuating device that is regularly connected to it.
- the object of the invention is to provide a toggle lever clamping device of the type mentioned, in which the wear-promoting loads are reduced.
- the stop surface lies in the swivel path of the swivel unit and cooperates with the swivel unit to specify the clamping position.
- the clamping position is defined by the interaction between a bearing surface on the bearing head side and the swivel unit containing the clamping arm itself. This results in a reduction in the shocks occurring during operation when the clamping position is reached, and accordingly the load on the actuating device and its components. Due to the regular lever ratio, the impact speed is greatly reduced compared to the prior art.
- the swivel unit expediently has a swivel lever which is non-rotatably connected to the tension arm and on which the second bearing point is located and which cooperates with the stop surface on the bearing head side.
- This pivot lever can be a separate component with respect to the clamping arm, which is non-rotatably seated on a bearing pin rotatably mounted on the bearing head and thereby defining the pivot axis, to which in turn the clamping arm is attached in a rotationally fixed manner.
- Such an arrangement favors the accommodation of the pivot lever in the interior of the bearing head and in the immediate vicinity of the actuating rod.
- the tension arm itself can be located outside the bearing head, so that the bearing head can be made with compact dimensions.
- the stop surface is preferably provided on the inside of a wall of the bearing head that extends parallel to the pivot axis of the pivot unit and radially upstream of the pivot axis.
- said wall expediently runs in front of the Swing lever with a right angle to the swivel plane.
- the swivel unit comes to rest on the stop surface shortly before the dead center of the toggle lever arrangement is reached.
- the dead center is defined in that the angle enclosed by the longitudinal axis of the actuating rod and the imaginary connecting line connecting the two bearing points forms a right angle.
- the initially obtuse included angle is gradually reduced until the dead center is reached, the actuating rod then expediently still moving slightly until the included angle is somewhat 15 less than 90.
- This end position of the actuating rod can be predetermined, for example, by a piston of the actuating device connected to the actuating rod coming to rest on a cover of the actuating device. Since the moving facial expressions have already been
- the articulation in the area of at least one of the two bearing points is expediently designed such that there is a slight relative possibility of movement between the articulated components in the radial direction with respect to the articulation axes. This can be done by appropriate design of the bearings and / or
- Fig. 1 shows a preferred design of the invention
- Toggle lever tensioning device with the tensioning arm in the tensioning position and partially in longitudinal section according to section line I-I from FIG. 2, FIG. 2, the toggle lever tensioning device in an axial plan view of the bearing head with a viewing direction according to the arrow
- the exemplary toggle lever tensioning device 1 contains an actuating device 2, which is formed by a fluid-operated working cylinder and in particular by a pneumatic cylinder. It has an elongated housing 3 with a tube-like middle part 4 and end caps 5, 6 fixed at the end of this.
- the interior of the housing 3 is axially divided into two working spaces by a piston 7 arranged axially displaceably therein, which alternate with a via internal fluid channels 8 fluidic pressure medium can be acted upon or relieved or vented to cause an axial linear movement of the piston 7.
- actuating rod 12 Attached to the piston 7 is a piston rod, hereinafter referred to as the actuating rod 12, which passes through the front end cover 5 under sealing. Its outer end section 13 located outside the housing 3 plunges into the interior 14 of a bearing head 15 attached to the front end face of the housing 3. The immersion depth depends on the current axial position of the actuating rod 12, which can be predetermined by the aforementioned fluid loading of the piston 7.
- a pivot unit is pivotably mounted on the bearing head 15.
- the pivot axis designated by reference number 17 lies laterally next to the axial movement path of the actuation rod 12 and extends at right angles to its longitudinal axis 18.
- An essential component of the swivel unit 16 is a clamping arm 22. It projects away from the bearing head 15 and can be used, for example, to clamp one or more workpieces in manufacturing and assembly technology.
- the pivotability of the pivot unit 16 makes it possible to pivot the clamping arm 22 according to the double arrow 23 between the clamping position shown in FIG. 1 and a release position (not shown in more detail) relative to the bearing head 15.
- the center of the swivel movement is the swivel axis 17.
- the swivel movement is caused by the
- Actuating device 2 and in particular through its actuating rod 12, which is in drive connection in the interior 14 of the bearing head 15 with the swivel unit 16.
- the outer end section 13 of the actuating rod 12 is articulated on the swivel unit 16 via a one-part or multi-part intermediate member 24.
- the intermediate member 24 is rotatably supported on the actuating rod 12 via a first bearing point 25.
- the assigned first axis of rotation is provided with reference numeral 26 in the drawing.
- the link-like intermediate member 24, for example is rotatably articulated via a second bearing point 27 on the swivel unit 16, the associated second axis of rotation being marked by reference number 28.
- the two axes of rotation 26, 28 run parallel to the swivel axis 17, the second axis of rotation 28 provided on the swivel unit 16 running at a distance from the swivel axis 17.
- the section of the swivel unit 16 which extends between the second axis of rotation 28 and the swivel axis 17 thus represents a first lever 32 which, with the intermediate member 24 representing a second lever 33, defines a toggle lever arrangement 34.
- the first lever 32 could be an integral part of the swivel unit 16. In favor of a compact structure and simple assembly, in the exemplary embodiment it is, however, a separate pivoting lever with respect to the tensioning arm 22, but nevertheless non-rotatably connected to the tensioning arm 22
- the bearing head 15 can have two plate-like side walls 38 which are at least partially spaced apart from one another and in particular run parallel to one another, between which the interior 14 is located and through which the bearing pin 36 passes with the interposition of a rotary bearing (not shown).
- the clamping arm 22 can be designed fork-like at its end facing the bearing head 15 and partially overlap the bearing head 15 with the arms fixed to the bearing pin 36.
- the swivel lever 35 is seated in a rotationally fixed manner on the central section of the bearing pin 36 which passes through the interior 14. Starting from this bearing pin 36, it projects to the front of the bearing head 15 opposite the actuating device 2, where the second bearing point 27 is located on the the intermediate member 24 is articulated, in particular also via a hinge pin connection.
- the first bearing point 25 is expediently also realized using a second bearing pin 42.
- This passes through a bearing eye 43 provided at the front end of the actuating rod 12 and at the same time the associated end section of the intermediate member 24, which in the exemplary embodiment has two, in particular rigidly connected, 10 tab elements 44, which flank both the bearing eye 43 and the pivot lever 35 on opposite sides.
- the second bearing pin 42 is axially extended beyond the intermediate link 24 on both sides and carries on its end sections in particular rotatably mounted and preferably roller-shaped guide elements 45. These each run in a guide groove 46 which runs on the inner surface of the adjacent side wall 38 of the bearing head 15 2 are provided.
- the guide grooves 46 extend parallel to the longitudinal axis 18 and thus in the direction of movement of the actuating rod 12.
- the actuating device 2 is actuated in such a way that the actuating rod 12 assumes a position that is as far as possible retracted into the housing 3.
- the piston 7 is as close as possible to the rear end cover 6.
- the first bearing 25 is near the
- the clamping arm 22 has reached its clamping position when the swivel unit 16 comes to rest against a stop surface 48 which is in its swivel path and is provided on the bearing head 15. It is expediently the pivot lever 35 which cooperates with the stop surface 48 on the part of the pivot unit 16.
- the abutment surface 48 is expediently on the inside of a further side wall 52 of the extending between the two side walls 38
- Bearing head 15 is provided, which is radially in front of the pivot axis 17 and extends next to the pivot lever 35. It expediently represents a further limiting element of the bearing head 15 for its interior 14. It is expediently located on the side of the bearing head 15 facing the tensioning arm 22. It can be part of the other two side walls 38.
- the longitudinal axis 18 of the actuating rod 12 When approaching the clamping position, the longitudinal axis 18 of the actuating rod 12 includes a first angle 54 with the imaginary connecting line 53 running between the two bearing points 25, 27 on the side facing the pivoting lever 35, which is an obtuse angle.
- the first angle 54 decreases increasingly until the pivot lever 35 comes to rest against the stop surface 48 and can no longer be pivoted further. This state expediently arises even before the dead center of the toggle lever arrangement 32, 33 has been reached, in the exemplary embodiment thus before the first angle 54 forms a right angle.
- the arrangement is expediently such that the contact between the Swivel unit 16 or its swivel lever 35 and the stop surface 48 take place about 3-5 before reaching the dead center, it has proven to be advantageous if the swivel angle of the intermediate member 24 to be covered until the dead center is about 4.
- the articulated connection defined by the first bearing point 25 is designed such that a radial relative Movement is possible between the intermediate member 24 and the actuating rod 12.
- This is realized, for example, by the fact that the second bearing pin 42 carrying the guide elements 45 is mounted radially without play in the intermediate member 24, but has a certain possibility of movement in the bearing eye 43 transversely to the direction of movement of the actuating rod 12. This can be achieved, for example, by means of an appropriately designed ball bearing.
- the guide tracks defined in the exemplary embodiment of guide grooves 46 for the guide elements 45 are provided with a lateral bulge 56 in the area of the dead center, so that overall the dead center can be overcome without risking jamming of the intermediate member 24 between the two bearing points 25, 27 .
- the clamping position not only the clamping position, but also the release position of the clamping arm 22 is defined by a stop surface provided on the bearing head 15, which is referred to below as the second stop surface 57. It is located on the side of the base 58 of the bearing head 15 facing away from the actuating device 2, which is attached to the actuating device 2. It is expediently located directly next to the actuating rod 12 passing through the bottom 58, which can be concentrically surrounded by the second stop surface 57.
- a counter-stop surface 62 provided on the outer end section 13 of the actuating rod 12, which is expediently provided on a radial projection of the actuating rod 12, which can be formed by a stop element 63 screwed onto the actuating rod 12. Its position on the actuating rod 12 is expediently chosen so that the counter abutment surface 62 comes to bear against the second abutment surface 57 before the piston 7 hits the rear end cover 6.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Jigs For Machine Tools (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29901363U | 1999-01-27 | ||
| DE29901363U DE29901363U1 (de) | 1999-01-27 | 1999-01-27 | Kniehebel-Spannvorrichtung |
| PCT/EP1999/009082 WO2000044531A1 (de) | 1999-01-27 | 1999-11-24 | Kniehebel-spannvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1068050A1 true EP1068050A1 (de) | 2001-01-17 |
| EP1068050B1 EP1068050B1 (de) | 2004-08-18 |
Family
ID=8068528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99958119A Expired - Lifetime EP1068050B1 (de) | 1999-01-27 | 1999-11-24 | Kniehebel-spannvorrichtung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6279887B1 (de) |
| EP (1) | EP1068050B1 (de) |
| DE (2) | DE29901363U1 (de) |
| WO (1) | WO2000044531A1 (de) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6199846B1 (en) * | 1998-04-28 | 2001-03-13 | Isi Norgren, Inc. | Electric power operated clamp with spring lock |
| DE29910607U1 (de) * | 1999-06-17 | 1999-08-12 | DE-STA-CO Metallerzeugnisse GmbH, 61449 Steinbach | Spannvorrichtung zum Festspannen von Werkstücken |
| DE10013874B4 (de) * | 2000-03-21 | 2013-04-18 | De-Sta-Co Metallerzeugnisse Gmbh | Kniehebelspannvorrichtung mit Öffnungswinkelbegrenzung |
| US6505824B2 (en) * | 2001-01-16 | 2003-01-14 | Dynamic Plastic Solutions | Clamping frame for plastic sheet thermoforming apparatus |
| US6627833B2 (en) * | 2002-01-30 | 2003-09-30 | United Technologies Corporation | Fixture for securing a workpiece |
| US7114408B2 (en) * | 2003-01-30 | 2006-10-03 | Delaware Capital Formation, Inc. | Drop away leaf pivot unit |
| US7815176B2 (en) | 2003-09-11 | 2010-10-19 | Phd, Inc. | Lock mechanism for pin clamp assembly |
| US7516948B2 (en) | 2004-04-02 | 2009-04-14 | Phd, Inc. | Pin clamp accessories |
| US7182326B2 (en) | 2004-04-02 | 2007-02-27 | Phd, Inc. | Pin clamp |
| DE102004053515B3 (de) * | 2004-10-29 | 2006-03-02 | Festo Ag & Co. | Spannvorrichtung zum Spannen von Werkstücken |
| DE102004053514B4 (de) * | 2004-10-29 | 2010-04-29 | Festo Ag & Co. Kg | Spannvorrichtung zum Spannen von Werkstücken mit Haupt- und Spannantrieb |
| US7448607B2 (en) | 2004-12-15 | 2008-11-11 | Phd, Inc. | Pin clamp assembly |
| DE102006022950A1 (de) * | 2006-05-17 | 2007-11-22 | De-Sta-Co Europe Gmbh | Spannvorrichtung zum Festlegen von Werkstücken |
| US8256069B2 (en) * | 2007-03-15 | 2012-09-04 | Kosmek Ltd. | Link type clamp device |
| EP2164677B1 (de) | 2007-06-19 | 2019-01-16 | PHD, Inc. | Stift- und klammernanordnung |
| EP2303505B1 (de) | 2008-06-18 | 2019-02-27 | PHD, Inc. | Abstreifstiftklemme |
| EP2177320A1 (de) * | 2008-10-15 | 2010-04-21 | UNIVER S.p.A. | Irreversible Kniehebelantriebsvorrichtung |
| CN109531206A (zh) * | 2018-12-28 | 2019-03-29 | 佛山市普拉迪数控科技有限公司 | 一种行李架加工设备 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4637597A (en) * | 1982-09-29 | 1987-01-20 | De-Sta-Co Division/Dover Corporation | Locking power clamp |
| US4905973B1 (en) * | 1989-01-11 | 1994-07-05 | John A Blatt | Power operated clamp with externally mounted adjustable clamp arm |
| US5575462A (en) | 1994-08-17 | 1996-11-19 | Blatt; John A. | Rotary clamp for a linear actuator |
| DE29614630U1 (de) * | 1996-08-23 | 1998-01-02 | Werner Turck GmbH & Co. KG, 58553 Halver | Anordnung zur sensorischen Ermittlung der Bewegungsendstellungen eines Kraftspanners |
| DE59702526D1 (de) * | 1996-12-17 | 2000-11-30 | Sta Co Mettallerzeugnisse Gmbh | Kniehebelspannvorrichtung mit Einrichtung zur Endstellungsanzeige |
| JP4099729B2 (ja) * | 1997-03-05 | 2008-06-11 | Smc株式会社 | シリンダ装置 |
| DE19732600C2 (de) * | 1997-07-29 | 2000-03-30 | Benteler Werke Ag | Bauteilspanner |
| DE29713944U1 (de) | 1997-08-05 | 1997-10-02 | Tünkers Maschinenbau GmbH, 40880 Ratingen | Druckmittelbetätigbare Kniehebelspannvorrichtung |
-
1999
- 1999-01-27 DE DE29901363U patent/DE29901363U1/de not_active Expired - Lifetime
- 1999-11-24 WO PCT/EP1999/009082 patent/WO2000044531A1/de not_active Ceased
- 1999-11-24 US US09/646,469 patent/US6279887B1/en not_active Expired - Fee Related
- 1999-11-24 DE DE59910286T patent/DE59910286D1/de not_active Expired - Lifetime
- 1999-11-24 EP EP99958119A patent/EP1068050B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0044531A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000044531A1 (de) | 2000-08-03 |
| EP1068050B1 (de) | 2004-08-18 |
| DE29901363U1 (de) | 1999-05-06 |
| DE59910286D1 (de) | 2004-09-23 |
| US6279887B1 (en) | 2001-08-28 |
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