EP0432884A2 - Kraftangetriebener Schraubenschlüssel - Google Patents

Kraftangetriebener Schraubenschlüssel Download PDF

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Publication number
EP0432884A2
EP0432884A2 EP90311709A EP90311709A EP0432884A2 EP 0432884 A2 EP0432884 A2 EP 0432884A2 EP 90311709 A EP90311709 A EP 90311709A EP 90311709 A EP90311709 A EP 90311709A EP 0432884 A2 EP0432884 A2 EP 0432884A2
Authority
EP
European Patent Office
Prior art keywords
drive shaft
plane
housing
power wrench
ratchet mechanism
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.)
Withdrawn
Application number
EP90311709A
Other languages
English (en)
French (fr)
Other versions
EP0432884A3 (en
Inventor
John K. Junkers
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 EP0432884A2 publication Critical patent/EP0432884A2/de
Publication of EP0432884A3 publication Critical patent/EP0432884A3/en
Withdrawn legal-status Critical Current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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0078—Reaction arms

Definitions

  • the present invention relates to a power wrench for tightening or loosening threaded connectors.
  • the invention relates to such power wrenches which operate in conjunction with sockets attached to their drive shaft to tighten or loosen a threaded connector which is spaced from the plane of the tool.
  • the tool is located up and above the threaded connector (a nut, a bolt head, etc.) to be turned, and a reaction arm of the tool reaches down to a neighbouring object.
  • the threaded connector a nut, a bolt head, etc.
  • My U.S. Patent 4,706,527 proposed a solution to this problem.
  • a spline sleeve extends around the axis of a square drive shaft, and the drive shaft is rotated in it.
  • the splined sleeve is a part of the side plate of the housing, and a reaction member can be attached to it so that the bending and torsional forces would be eliminated.
  • the tool disclosed in this reference however has certain limitations. It cannot be efficiently adjusted for tightening or loosening threaded connectors which are located at considerably differing distances from the plane of the tool. When the tool uses a non-reversible ratchet mechanism, it is not possible to use the same tool both for tightening and loosening the threaded connectors.
  • a power wrench for tightening and loosening threaded connectors comprising a housing, a ratchet mechanism turnable about an axis; a power drive arranged in said housing and connected with said ratchet mechanism via a drive element so as to turn the ratchet mechanism about said axis, said drive element extending in a predetermined plane; a drive shaft drivably connected to the ratchet mechanism and arranged to hold means at a distal end of the drive shaft for turning threaded connectors, said drive shaft extending transversely to said plane substantially along said axis at one side of said plane, which is characterised in that said drive shaft is removably connected with said ratchet mechanism so that said drive shaft can be easily removed from the housing and replaced by a drive shaft of different length to reach threaded connectors located farther from or closer to said plane; a reaction member connected to the housing and extending trans
  • the drive shaft is releasably connected with the ratchet mechanism and can be replaced by a drive shaft of a different length to reach differently spaced threaded connectors, or placed at an opposite side of the tool plane to reverse the operation from tightening to loosening and vice versa in the event of the use of non-reversible ratchet mechanism.
  • a guiding sleeve surrounds the drive shaft which is also removable and replaceable by a sleeve of a different length or mountable at the opposite side of the tool plane to be adapted to the respectively sized or mounted drive shaft.
  • the aforesaid guiding sleeve can be a part of an element which on the other hand serves for guiding the drive shaft and on the other hand serves as a reaction member for reacting against a neighbouring object during tightening or loosening threaded connectors.
  • Figure 1 is a partially sectioned side view showing an actuating assembly of a power wrench in accordance with the present invention
  • Figure 2 is a partially disassembled end view of the actuating assembly of Figure 1 connected with a drive of a power wrench, and
  • Figure 3 is a partially sectioned view showing another embodiment of the actuating assembly in accordance with the present invention.
  • a power wrench for tightening or loosening threaded connectors includes a housing 10 with two housing portions 10' and 10''.
  • the power wrench further has a drive element which is identified with reference numeral 1 and is formed as a drive plate.
  • the drive plate 1 has an upper portion 2 which engages in a cup-shaped projection 3 mounted on an end of a piston rod 4 of a power drive 5.
  • the power drive 5 can be formed as a cylinder-piston unit arranged in the housing portion 10' and having the piston connected to the piston rod 4. During a reciprocating movement of the cylinder-piston unit, the drive plate 1 is turned in opposite directions respectively.
  • the actuating assembly of the invention further includes a ratchet mechanism with a toothed pawl 6 mounted on the drive plate 1 and a ratchet wheel 7 engaged by the pawl.
  • a ratchet mechanism with a toothed pawl 6 mounted on the drive plate 1 and a ratchet wheel 7 engaged by the pawl.
  • the pawl is turned in the same direction, and due to the engagement of the teeth of the pawl and the ratchet wheel, turns the ratchet wheel in the same direction.
  • the teeth of the pawl just slide over the teeth of the ratchet wheel without turning the latter.
  • Such a ratchet mechanism constitutes a non-reversible drive mechanism.
  • the actuating assembly in accordance with the present invention can also use a reversible ratchet mechanism which performs working strokes in both directions such reversible mechanisms being well known in the art.
  • a supporting element supports the drive plate and is formed by the housing portion 10''. It includes for example two side plates 8a and 8b located at opposite sides of the drive plate. The side plates are connected with one another by pins 9 and are also connected with a housing portion 10' of the tool by pins 11. The side plates each have a central opening for supporting respective parts of the tool, as will be explained hereinbelow.
  • a drive shaft 13 is provided for turning threaded connectors to be tightened or loosened.
  • the drive shaft 13 has a distal end 13a adapted to carry a socket 26 to be fitted on a threaded connector for turning the latter in a respective direction.
  • the ratchet wheel 7 has a central opening 14 through which the proximal end of the drive shaft 13 passes.
  • the ratchet wheel 7 and the drive shaft 13 are connected with one another for joint rotation, for example by the interengaging of cooperating splines or other, preferably polygonal, formations.
  • the drive shaft 13 has an axis A and extends in direction of the axis substantially entirely to one side of a plane B defined by the median plane of the drive plate 1. A small portion at the proximal end projects axially beyond the plane B and is provided with a threaded recess 19.
  • the major portion of the drive shaft 13 which extends to the right of the plane B is supported in a guiding element 15 which in this embodiment is formed as a guiding sleeve.
  • the guiding sleeve 15 extends in a central opening 12b of the side plate 8b and is removably and non-rotatably connected with the latter, for example by splines or other, preferably polygonal, interengaging formations.
  • the opposite small portion of the drive shaft 13, located at the left side of the plane B is guided in holding means which include a holding element 16 and a holding member 17.
  • the holding element 16 is cup-shaped, and its axial wall extends through the central opening 12a in the side plate 8a and is removably but non-rotatably connected with the latter, for example by splines or other, preferably polygonal, interengaging formations.
  • the holding member 17 is also cup-shaped and its axial wall removably bears against the ratchet wheel 7 surrounding the small left portion of the drive shaft 13.
  • the holding member 17 engages the proximal end of the drive shaft 13 (shown sectioned) for example by splines or other, preferably polygonal, formations.
  • the holding member 17 is slidably received in the holding element 16.
  • a screw 18 is screwed through a central opening in the holding element 16 and the holding member 17 into the threaded recess 19 in the proximal end of the drive shaft 13. It is retained in the central opening in the element 16 and member 17 by a spring clip 20. The guiding sleeve 15 in turn is retained by a spring clip 21.
  • a reaction member 22 is provided in the tool.
  • the reaction member is arranged on the guiding sleeve 15 and is connected with the latter by interengaging splines or other, preferably polygonal, formations.
  • the splines on the guiding sleeve 15 are used for connecting the same to the side plate 8b and to the reaction member.
  • the reaction member includes a reaction shaft 22' which extends substantially in the direction of the axis A and transversely to the plane B.
  • the distal end of the reaction shaft 22' is provided with a reaction part 22'' formed so as to reach a neighbouring object capable of absorbing reaction torque during tightening or loosening of a threaded connector.
  • the reaction part 22'' extends perpendicular to the axis A.
  • the drive plate 1 When the power drive 5 is activated and the piston rod 4 moves in one direction, the drive plate 1 is turned in one direction and turns the pawl 6, which in turn turns the ratchet wheel 7.
  • the ratchet wheel 7 then turns the drive shaft 13 about axis A which transmits a turning force to the socket 26 (shown in chain lines) attached to the distal end 13a of the shaft.
  • the socket fixed on a threaded connector such as a nut or a bolt head, then turns the threaded connector in a predetermined direction.
  • the pawl teeth slip over the teeth of the ratchet wheel without turning the latter in the opposite direction.
  • the reaction torque is absorbed via the member 22 to permit the generation of tightening or loosening forces on the connector.
  • the drive shaft 13 and the guiding sleeve 15 can be easily removed by unscrewing the screw 18 and moving the drive shaft 13 and the guiding sleeve 15 to the right in Figure 1 of the drawings, withdrawing the drive shaft from the ratchet wheel 7.
  • a new drive shaft 13 of a greater axial length or a smaller axial length can be connected with the ratchet wheel, and a corresponding guiding sleeve 15 of a greater axial length or a smaller axial length can be connected with the right side plate 8b so that a threaded connector located farther from the plane B or closer to the plane B can be turned.
  • the reaction member 22 is also removable and can be replaced by a reaction member of a greater axial length or a smaller axial length to reach a corresponding neighbouring reaction torque-absorbing object as required.
  • the splines on the holding means 16, 17, on the guiding sleeve 15, and in both the side plates 8a and 8b need to be complementary to permit mounting of the holding means on the one hand and the drive shaft with the guiding sleeve on the other hand at the above specified alternative locations.
  • the reaction member 22 is also removed from its engagement with plate 8b and secured on the left side of the plane B to plate 8a (e.g. by being screwed thereto).
  • Figure 3 shows another embodiment of the present invention.
  • the tool is provided with an element 23.
  • the element 23 has a guiding portion 24 which substantially corresponds to the guiding sleeve 15 of the embodiment of Figure 1. It also has a reaction portion 25 which substantially corresponds to the reaction member 22 of the embodiment of Figure 1.
  • the portions 24 and 25 are of one-piece with one another so that during mounting of the drive shaft 13 on the opposite side (left side) of the plane B, not only the guiding portion 24, but also the reaction portion 25 are mounted on the plate 8a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP19900311709 1989-12-15 1990-10-25 Power wrench Withdrawn EP0432884A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45175089A 1989-12-15 1989-12-15
US451750 1999-11-30

Publications (2)

Publication Number Publication Date
EP0432884A2 true EP0432884A2 (de) 1991-06-19
EP0432884A3 EP0432884A3 (en) 1991-08-21

Family

ID=23793543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900311709 Withdrawn EP0432884A3 (en) 1989-12-15 1990-10-25 Power wrench

Country Status (3)

Country Link
EP (1) EP0432884A3 (de)
JP (1) JPH03196977A (de)
BR (1) BR9006780A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039857A1 (de) * 1996-04-20 1997-10-30 Wagner, Paul-Heinz Hydraulischer kraftschrauber
WO1998012058A1 (en) * 1996-09-17 1998-03-26 Alfonso Apicella A system and tools for screwing and unscrewing threaded elements
GB2434116A (en) * 2006-01-11 2007-07-18 Jetyd Corp Link attachment to torque wrench
CN103753472A (zh) * 2014-01-05 2014-04-30 陈学红 一种扳手头
GB2524825A (en) * 2014-04-04 2015-10-07 Hire Torque Ltd Torque wrench with reaction arm
CZ306589B6 (cs) * 2007-10-29 2017-03-22 John Kurt Junkers Kapalinou ovládaný momentový klíč a způsob utahování nebo povolování upevňovacího prvku

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101890690B (zh) * 2010-06-29 2012-07-04 杨国福 省力扳手套筒及其制作方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201099B1 (en) * 1978-08-14 1993-12-07 K. Junkers John Hydraulic wrench
DE3611368A1 (de) * 1986-04-04 1987-10-08 Applied Power Inc Kraftschrauber
US4825730A (en) * 1987-09-29 1989-05-02 Junkers John K Fluid operated wrench

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039857A1 (de) * 1996-04-20 1997-10-30 Wagner, Paul-Heinz Hydraulischer kraftschrauber
WO1998012058A1 (en) * 1996-09-17 1998-03-26 Alfonso Apicella A system and tools for screwing and unscrewing threaded elements
GB2434116A (en) * 2006-01-11 2007-07-18 Jetyd Corp Link attachment to torque wrench
US7451672B2 (en) 2006-01-11 2008-11-18 Jetyd Corp. Link attachment to torque wrench
CN100462204C (zh) * 2006-01-11 2009-02-18 Jetyd公司 扭矩扳手用连杆装置
GB2434116B (en) * 2006-01-11 2009-08-26 Jetyd Corp Link attachment to torque wrench
CZ306589B6 (cs) * 2007-10-29 2017-03-22 John Kurt Junkers Kapalinou ovládaný momentový klíč a způsob utahování nebo povolování upevňovacího prvku
CN103753472A (zh) * 2014-01-05 2014-04-30 陈学红 一种扳手头
GB2524825A (en) * 2014-04-04 2015-10-07 Hire Torque Ltd Torque wrench with reaction arm

Also Published As

Publication number Publication date
EP0432884A3 (en) 1991-08-21
BR9006780A (pt) 1991-10-01
JPH03196977A (ja) 1991-08-28

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