EP0066640B1 - Mechanismus zum schnellen Vorwärtsbewegen und Zurückziehen für eine Spannvorrichtung - Google Patents

Mechanismus zum schnellen Vorwärtsbewegen und Zurückziehen für eine Spannvorrichtung Download PDF

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Publication number
EP0066640B1
EP0066640B1 EP81104412A EP81104412A EP0066640B1 EP 0066640 B1 EP0066640 B1 EP 0066640B1 EP 81104412 A EP81104412 A EP 81104412A EP 81104412 A EP81104412 A EP 81104412A EP 0066640 B1 EP0066640 B1 EP 0066640B1
Authority
EP
European Patent Office
Prior art keywords
nut
spindle
threads
springs
halves
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
Application number
EP81104412A
Other languages
English (en)
French (fr)
Other versions
EP0066640A1 (de
Inventor
Anny Hu
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
Priority to AT81104412T priority Critical patent/ATE16084T1/de
Priority to DE8181104412T priority patent/DE3172658D1/de
Priority to EP81104412A priority patent/EP0066640B1/de
Publication of EP0066640A1 publication Critical patent/EP0066640A1/de
Application granted granted Critical
Publication of EP0066640B1 publication Critical patent/EP0066640B1/de
Expired 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
    • B25B1/00—Vices
    • B25B1/06—Arrangements for positively actuating jaws
    • B25B1/10—Arrangements for positively actuating jaws using screws
    • B25B1/12—Arrangements for positively actuating jaws using screws with provision for disengagement
    • B25B1/125—Arrangements for positively actuating jaws using screws with provision for disengagement with one screw perpendicular to the jaw faces
    • 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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/023—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same using screws

Definitions

  • the present invention relates to a rapid operating mechanism for advancing or retracting the screw spindle of clamping means, for example clamps, vises, and such-like.
  • clamping devices fall into two categories: manual type, and hydraulic type.
  • manual type the application of the former is much limited due to the structure thereof, and adapted only to special C-clamps.
  • such device entails a preparatory step to set the screw in operating position and is therefore inconvenient. For this reason, it is not preferably accepted by the public. While the cost of production of the latter is also high, it is not adapted to ordinary use.
  • the layout of such device is inconveniently bulky, thus limiting its application to some specialized works.
  • a yet known means to obtain the rapid advance or retraction of clamping means to fasten or release the workpiece is accomplished by an eccentric nut provided with thread means on half of its internal surface, which nut, normally does not in engagement with the screw spindle, yet when turned inside a hollow cylindrical body in the frame, will produce a radial displacement such that its half-threads engage with the screw spindle penetrating through it. Rapidly as it can fasten or release the workpiece, such device suffers several disadvantages as follows:
  • the invention concerns a rapid advancing or retracting mechanism for a clamping device, comprising a screw spindle, a nut provided with female threads which can mesh with the male threads of said screw spindle, support means for said nut and spring means, said support means and spring means cooperating with each other so that when said nut is not in mesh with said spindle, at least part of said nut is resiliently urged against the spindle, insomuch that the screw spindle is allowed to make frictional axial movement in said nut, and the nut can frictionally co-rotate with said spindle, and a radial displacement of said nut with respect to the axis of said spindle is produced when the nut co-rotates with said spindle, so that the threads of said nut and the threads of said spindle engage when said spindle is turned in a first direction of rotation that produces axial advancing of the spindle, or disengage when said spindle is turned in a second direction of rotation that produces axial retracting
  • the load is equally distributed to the two nut halves as well as the periphery of the screw spindle, thus largely reducing the wear thereof.
  • the said two springs are interconnected in an end-to-end manner to define a loop wrapping around said nut halves and each of said two springs is provided with elongate slots extending along the length of the spring along the path that said pins make relative to the springs when each spring is turned in said hollow body, including an open slot and a close slot, separated by a stop piece which is so positioned that when the threads of said nut halves are completely in mesh with said screw spindle, the springs are stopped by said pins with their stop piece lying in the pins' path of relative motion.
  • each spring is formed integrally by a piece of highly tough, resilient metal.
  • Figure 4 is an embodiment of this invention.
  • this invention comprises a hollow cylindrical body 1 for receiving a pair of split nuts 3, 3', resiliently retained in place by a pair of springs 4, 4'.
  • the inner wall cylindrical body 1 is provided with two opposite pins 11 which form an integral part of cylindrical body 1.
  • the broken lines with reference numerals 31 and 31' designate the female thread of the split nuts 3, 3'.
  • the arrow X in Figures 1A and 1 B indicates the direction of the advance of the screw spindle 2.
  • Each of the tails 42, 42' of springs 4, 4' is structured to engage with the heads 43', 43 of another spring.
  • Figure 2 there is shown a plane view of one of the aforementioned springs, which is formed integrally by a highly tough, flexible and machine- able steel plate with two slots including a closed slot 44 and an open slot (not numeralled) extending along the length of the spring to allow a pin to pass through.
  • a stop piece 41 divides the slot into two. Both sides of ends of the heads 43, 43' are flanged, to define an inserter 431 to insert into groove 33 and to abut the tail 42 of another spring, whereas only one side of the end of the tail 42 is flanged.
  • a tapering 34, 34' of the thickness of the nut wall at the two margins is found to give better results.
  • Figure 4 is an embodiment of this invention. In operation, one only needs to push the screw spindle 2 forward to touch the workpiece, and then fasten it with a few turns in the first direction. Likewise, while dismounting the workpiece, one only needs to make a turn in reverse direction, then pull the screw spindle 2 back.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Claims (3)

1. Mechanismus zum schnellen Vorschieben und Zurückziehen für eine Spannvorrichtung, mit einer Schraubenspindel (2), mit einer Mutter (3, 3'), versehen mit Innengewindegängen (31, 31'), die in die Außengewindegänge (21) der Schraubenspindel (2) eingreifen können, mit Haltemitteln (1) für die Mutter (3,3') und Federmittel (4, 4'), wobei die Haltemittel (1) und Federmittel (4, 4') so zusammenwirken, daß wenn die Mutter (3, 3') nicht mit der Spindel (2) in Eingriff steht, wenigstens ein Teil der Mutter (3, 3') federnd gegen die Spindel gedrückt wird, so daß die Schraubenspindel in der Mutter mit Reibung eine axiale Bewegung machen kann und sich die Mutter durch Reibung mit der genannten Spindel drehen kann und eine Radialverschiebung der Mutter gegenüber der Achse der Spindel erzeugt wird, wenn sich die Mutter mit der Spindel dreht, so daß die Gewindegänge der Mutter und die Gewindegänge der Spindel ineinandergreifen wenn die Spindel in einer ersten Drehrichtung gedreht wird, die den axialen Vorschub der Spindel hervorruft, bzw. außer Eingriff kommen, wenn die Spindel in einer zweiten Drehrichtung gedreht wird, die den axialen Rückzug der Spindel hervorruft, dadurch gekennzeichnet, daß die Mutter ein Paar Mutternhälften (3,3') umfaßt, die eine ganze Mutter mit einer zylindrischen Außenfläche bilden, sobald sie voll in die Schraubenspindel (2) eingreifen, daß die Haltemittel einen Hohlkörper (1) bilden, der das genannte Mutternhälftenpaar (3, 3') aufnimmt und mit zwei einander gegenüberliegenden Stiften (11) versehen ist, die von seiner Innenwand aus symmetrisch zur Mittelachse nach innen vorstehen, daß die genannten Federmittel zwei Federn umfassen, von denen jede mit einem Ende an ein Ende einer der Mutternhälften (3, 3') befestigt ist, so daß die Mutternhälften (3, 3') federnd gegen die Spindel gedrückt werden, und daß Anschlagmittel (41, 41') vorgesehen sind, die verhindern, daß sich die Mutternhälften (3, 3') und die Federn (4,4') weiter mit der Spindel in der ersten Drehrichtung drehen sobald die Mutternhälften voll mit den Gewindegängen (21) der Spindel (2) in Eingriff sind.
2. Mechanismus gemäß Anspruch 1, in dem die beiden Federn (4, 4') jeweils mit ihren Enden miteinander verbunden sind und so eine Schleife bilden, die die Mutternhälften (3,3') umgreift, und in dem jede der zwei Federn (4, 4') entlang der Länge der Federn (4, 4') mit Schlitzlöchern versehen sind, die sich entlang dem Weg, den die genannten Stifte (11) relativ zu den Federn (4, 4') zurücklegen wenn jede der Federn im Hohlkörper (1) gedreht wird, erstrecken, wobei die Schlitzlöcher jeweils aus einem offenen Schlitz und einem geschlossenen Schlitz (44) bestehen, die durch ein die Anschlagsmittel bildendes Anschlagsteil getrennt werden, das so liegt, daß die Federn (4, 4') von den genannten Stiften (11) gestoppt werden sobald die Gewindegänge (31, 31') der Mutternhälften (3, 3') voll im Eingriff mit der Schraubenspindel (2) sind, weil das Anschlagteil (41) in dem Weg der Relativbewegung der Stifte liegt.
3. Mechanismus gemäß Anspruch 2, in dem jede Feder (4, 4') einstückig aus hochzähem, elastischem Material gebildet wird.
EP81104412A 1981-06-09 1981-06-09 Mechanismus zum schnellen Vorwärtsbewegen und Zurückziehen für eine Spannvorrichtung Expired EP0066640B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT81104412T ATE16084T1 (de) 1981-06-09 1981-06-09 Mechanismus zum schnellen vorwaertsbewegen und zurueckziehen fuer eine spannvorrichtung.
DE8181104412T DE3172658D1 (en) 1981-06-09 1981-06-09 Rapid advancing and retracting mechanism for clamping device
EP81104412A EP0066640B1 (de) 1981-06-09 1981-06-09 Mechanismus zum schnellen Vorwärtsbewegen und Zurückziehen für eine Spannvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81104412A EP0066640B1 (de) 1981-06-09 1981-06-09 Mechanismus zum schnellen Vorwärtsbewegen und Zurückziehen für eine Spannvorrichtung

Publications (2)

Publication Number Publication Date
EP0066640A1 EP0066640A1 (de) 1982-12-15
EP0066640B1 true EP0066640B1 (de) 1985-10-16

Family

ID=8187760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104412A Expired EP0066640B1 (de) 1981-06-09 1981-06-09 Mechanismus zum schnellen Vorwärtsbewegen und Zurückziehen für eine Spannvorrichtung

Country Status (3)

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EP (1) EP0066640B1 (de)
AT (1) ATE16084T1 (de)
DE (1) DE3172658D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9313633D0 (en) * 1993-07-01 1993-08-18 Black & Decker Inc A clamp nut
DE19844508B4 (de) * 1998-02-19 2005-02-24 Krumm Kg Abzieher
DE29821143U1 (de) * 1998-11-26 1999-02-25 Kleinbongartz & Kaiser, 42853 Remscheid Abzieher mit schnellverstellbarer Druckspindel
CN114346562A (zh) * 2021-12-17 2022-04-15 江西洪都航空工业集团有限责任公司 一种夹持工具

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE705306C (de) * 1938-11-25 1941-04-23 Auto Union A G Vorrichtung zum Ausdruecken von Kolbenbolzen
US3669440A (en) * 1970-06-18 1972-06-13 Wilton Corp Quick engaging and disengaging nut mechanism

Also Published As

Publication number Publication date
EP0066640A1 (de) 1982-12-15
ATE16084T1 (de) 1985-11-15
DE3172658D1 (en) 1985-11-21

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