EP2001639A2 - Kraftschrauber - Google Patents
KraftschrauberInfo
- Publication number
- EP2001639A2 EP2001639A2 EP07727134A EP07727134A EP2001639A2 EP 2001639 A2 EP2001639 A2 EP 2001639A2 EP 07727134 A EP07727134 A EP 07727134A EP 07727134 A EP07727134 A EP 07727134A EP 2001639 A2 EP2001639 A2 EP 2001639A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- friction
- output shaft
- power
- brake
- housing
- 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
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000004575 stone Substances 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
- 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
Definitions
- the invention relates to a power wrench with a hydraulic cylinder containing a driving part and a driven part, wherein the driven part has a rotatably mounted in a housing output shaft which is rotated by a ratchet lever at intervals.
- the invention has for its object to provide a power wrench that allows a uniform tightening screws without security risk.
- the power wrench according to the invention is characterized by the claim 1. It contains a continuously acting friction brake, which generates a frictional force between the drive shaft and the housing. This frictional force is generated permanently and during the power stroke it is overcome by the hydraulic drive.
- the friction brake causes a uniform tightening of the screw. It allows an installer to simultaneously monitor multiple bolting operations performed with power screwdrivers.
- the power wrench is reliably positioned and held in any working position regardless of the phase of the respective stroke. There is no incremental locking.
- the restraint system is constantly active. Switching the hydraulic system on and off is not required. There are no additional bending moments on the screw, as is the case with systems with pawl. One Jamming of the screwing tool after the last stroke does not take place. Therefore, time-consuming solution procedures are eliminated.
- the safe removal of the device is guaranteed. Due to the elimination of a latching and disengagement, the device is secured in any working position.
- the friction brake may comprise at least one friction shoe, which is arranged substantially radially to the output shaft and presses against a circumferential friction surface.
- the friction surface is preferably arranged on the output shaft or on a component connected thereto. But it is also possible to provide the friction shoe on the output shaft and to let it act on a friction surface of the housing.
- each friction shoe is pressed by an adjustable clamping device against the drive shaft. In this way an adjustment or adjustment of the friction brake is possible.
- the tensioning device preferably has a clamping wedge.
- the friction brake has a flange of the drive shaft which presses against a housing-fixed friction part. By acting on the flange friction force the output shaft is braked.
- a spring is provided which presses the output shaft in the direction of the friction part.
- the friction member may be rotatably connected to a coupling ring which presses axially against the spring via a thrust bearing.
- a frictionally held rotatable scale ring is arranged concentrically to the drive shaft having a central window through which a mark of the output shaft is visible.
- Such a scale ring can be used to the rotation angle of To indicate output shaft.
- the scale ring is first adjusted by manually turning to the respective position of the marker to memorize the initial position. During the screwing operation, the marking moves relative to the scale ring, wherein the respective screw angle can be easily read.
- Fig. 1 is a side view of a first embodiment of the
- Fig. 5 is an end view of the power wrench from the direction of the arrow V of
- FIG. 10 is an enlarged view of the detail X of FIG. 9 and
- FIG. 11 shows a section through the tensioning device of the friction brake along the line XI-XI of FIG. 8.
- the Kraftsch rauber of the embodiment of Figures 1-3 has a housing 10 which is formed substantially L-shaped and in one leg a drive member 11 and in the other leg includes a driven member 12.
- the drive member includes a hydraulic piston-cylinder unit (not shown) with a reciprocating piston rod.
- the piston rod drives a ratchet lever.
- the output part 12 includes an output shaft 14 mounted in the housing, which is a hollow shaft (FIG. 3), which contains a hexagon socket profile 15.
- the ratchet lever 16 Between two side walls 10A, 10B of the housing 10 is the ratchet lever 16, which is coupled via a toothing 17 with an outer toothing of the output shaft 14.
- the ratchet lever 16 takes in a working stroke, the output shaft 14 in the one direction with, while it slides back empty in the return stroke. In this way, the output shaft 14 is rotated at intervals.
- the friction brake 20 has a friction shoe 21, which is arranged radially to the output shaft 14 and presses against a friction surface 22 on the circumference of the output shaft.
- a tensioning device 23 has a clamping wedge 24, which is provided with a threaded bore, in which a clamping screw 25, which is held in the housing wall 1OB, is screwed. By tightening the clamping screw 25, the clamping wedge 24 is pulled outwards (according to FIG. 3 to the right), as a result of which it presses against a rear wedge surface of the friction shoe 21 and drives it in the direction of the friction surface 22.
- Friction brake 20 exerts a constant braking force on the output shaft upon rotation of the output shaft, so that it is prevented from turning back.
- the housing 10 also includes a drive member 11 and an output member 12.
- a drive member 11 On the cylindrical drive member 11 is a spline 30, on which a (not shown) support foot can be plugged, which is set against a stationary abutment is to prevent rotation of the housing 10 in the screwing.
- the housing 10 also contains here two parallel housing walls 10a, 10b with holes in which the output shaft 14 is mounted.
- the output shaft 14 is fully formed here and it protrudes on one side out of the housing 10, where on the output shaft is a slip-on square 26, on which a key nut can be attached.
- On a spline 31 of the output shaft 14 is rotatably seated a sleeve 32, which is additionally provided with an external toothing 33. In this external teeth engages the teeth of a Mit freelancesteines 34, which is housed in the interior of the housing 10 and engages with the ratchet lever 16.
- the reciprocating ratchet lever 16 drives on the Mit predominantlystein 34, the sleeve 32 and the output shaft 14, wherein the sleeve and the output shaft are taken only in one direction of rotation.
- a slider 35 In an axial recess of the output shaft 14 slides a slider 35 whose end wall 36 forms a push button.
- a spring 37 pushes the slider 35 to the outside.
- the slide has a circumferential groove 38 which, when the slide is pushed in, partially receives a ball 39, which is movable in an axial bore of the output shaft.
- an intermediate sleeve 40 which is unlocked on a shaft of the output shaft 14, of the output shaft, so that the intermediate sleeve can be removed when the push button 36 is depressed.
- the intermediate bushing 40 connected to the output shaft 14 in a rotationally fixed manner has a radial flange 41 at the outer end.
- the latter presses against a friction surface 42 of an annular friction part 43 connected to the housing 10 from the outside.
- the friction surface 42 can also be formed by a friction lining become.
- the flange 41 thus forms a friction brake 20 with the friction surface 42.
- This also includes a plate spring 49, which presses the intermediate sleeve 40 against the friction surface 42.
- the coupling ring 45 On a thread 44 of the friction member 43 sits a coupling ring 45 which is secured with a locking pin 46.
- the coupling ring 45 engages around a needle bearing 47 which is axially supported on the coupling ring 45 and which presses on the opposite side with a disc 48 against the plate spring 49.
- the coupling ring 45 together with the plate spring 49 is part of a clamping device 23 for adjusting the frictional force of the friction brake 20th
- the scale ring 50 On the coupling ring 45 sits a scale ring 50 which is secured with an O-ring 51 latching.
- the scale ring 50 has an angle scale of 0 ° - 360 °, which is visible in Figure 4.
- the scale ring is rotatable on the housing 10 and arranged concentrically to the output shaft. It has a centric window 53, through which a mark 52 of the output shaft is visible. It can be rotated on the coupling ring rubbing in any angular position, so that it can be adjusted with the position 0 ° to the mark 52 on the push button 36.
- the push button 36 is rotatably connected to the output shaft 14 and thus it indicates the respective rotational position of the screw as a relative position.
- the scale ring 50 is manually zeroed to memorize the initial position.
- the marking 52 moves in accordance with the progress of the screwing, so that the user can read off the respective angle of rotation which has been swept over since the start of the screwing operation or since another point of the screwing operation.
- the scale ring in conjunction with the output shaft belonging to mark 52 has an independent meaning and is not bound to the presence of a friction brake.
- the embodiment of Figures 8 - 11 includes a rotatably mounted between the housing walls 10a and 10b output shaft 14 with an external toothing (not shown), in which a reciprocally movable ratchet lever 16 engages.
- the output shaft 14 contains an internal hexagonal profile 15. In this, one screw head is inserted from one end (according to FIGS. 9 and 10 from the left), while the friction brake 20 and the scale ring 50 are located at the opposite end (right).
- the friction brake 20 has a friction part 60 with a bush, which is rotationally secured to the hollow output shaft 14 is connected.
- An annular friction disk 61 projects radially from the bush and has a circumferential region 62 with two radial friction surfaces 62a and 62b.
- the brake pads 63a, 63b of the friction brake 20 engage.
- the friction lining 63 a is fixed to an inner brake shoe 64 and the friction lining 63 b is fastened to an outer brake shoe 65, the brake shoes lying parallel to one another and clamping the edge 62 of the friction part 60 between them.
- the clamping effect is caused by two clamping screws 66 ( Figure 8), the brake shoes 64 and 64 against each other and can be adjusted to adjust the braking force of the friction brake 20.
- a retaining screw 67 is arranged, which is screwed into the housing wall 10b and the friction brake 20 holds on the housing 10.
- the friction brake 20 is formed in the third embodiment in the manner of a caliper brake, wherein the two brake shoes 64, 65 form a brake caliper, which engages with the friction linings 63a, 63b astride the edge of the friction disc 61.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12195434.1A EP2567787B1 (de) | 2006-03-21 | 2007-03-20 | Kraftschrauber |
PL07727134T PL2001639T3 (pl) | 2006-03-21 | 2007-03-20 | Wkrętarka silnikowa |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202006004380U DE202006004380U1 (de) | 2006-03-21 | 2006-03-21 | Kraftschrauber |
PCT/EP2007/052657 WO2007107575A2 (de) | 2006-03-21 | 2007-03-20 | Kraftschrauber |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12195434.1A Division EP2567787B1 (de) | 2006-03-21 | 2007-03-20 | Kraftschrauber |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2001639A2 true EP2001639A2 (de) | 2008-12-17 |
EP2001639B1 EP2001639B1 (de) | 2012-12-05 |
Family
ID=38229085
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12195434.1A Active EP2567787B1 (de) | 2006-03-21 | 2007-03-20 | Kraftschrauber |
EP07727134A Active EP2001639B1 (de) | 2006-03-21 | 2007-03-20 | Kraftschrauber |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12195434.1A Active EP2567787B1 (de) | 2006-03-21 | 2007-03-20 | Kraftschrauber |
Country Status (6)
Country | Link |
---|---|
US (1) | US8024996B2 (de) |
EP (2) | EP2567787B1 (de) |
JP (1) | JP2009530124A (de) |
DE (1) | DE202006004380U1 (de) |
PL (1) | PL2001639T3 (de) |
WO (1) | WO2007107575A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD1042067S1 (en) * | 2023-02-28 | 2024-09-17 | Primesource Consulting Llc | Limited clearance tool |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2890612A (en) * | 1956-06-15 | 1959-06-16 | Francis J Kelly | Hydraulic ratchet wrench |
DE1944797U (de) * | 1966-04-26 | 1966-08-18 | Gardner Denver Co | Vorrichtung zum anziehen von gewindeteilen. |
US3604292A (en) * | 1968-02-08 | 1971-09-14 | Riken Seiki Kk | Bolt and nut fastening device |
DE6602839U (de) * | 1968-05-02 | 1969-06-26 | Premag Gmbh | Drehschrauber |
FR2362704A1 (fr) * | 1976-08-23 | 1978-03-24 | Harmat Nominees Pty Ltd | Cle dynamometrique |
US4201099B1 (en) * | 1978-08-14 | 1993-12-07 | K. Junkers John | Hydraulic wrench |
US4970919A (en) * | 1987-11-05 | 1990-11-20 | Raymond Engineering Inc. | Torquing apparatus |
US5398574A (en) * | 1992-12-23 | 1995-03-21 | Unex Corporation | Fluid operating tool |
WO1998010260A1 (en) * | 1996-09-05 | 1998-03-12 | Crane Electronics Ltd. | Variable torque rate simulated test joint |
US20050011313A1 (en) * | 2001-06-20 | 2005-01-20 | Norwolf Tool Works | Compact hydraulic torque wrench reaction arm |
DE20111326U1 (de) * | 2001-07-07 | 2001-09-27 | Wagner, Paul-Heinz, 53804 Much | Hydraulischer Kraftschrauber |
DE10236585A1 (de) * | 2002-08-08 | 2004-02-19 | Paul-Heinz Wagner | Hydraulikschrauber |
US7069819B2 (en) * | 2003-10-28 | 2006-07-04 | Albertson Robert V | Air motor socket wrench with quick socket release and muffler |
-
2006
- 2006-03-21 DE DE202006004380U patent/DE202006004380U1/de not_active Expired - Lifetime
-
2007
- 2007-03-20 PL PL07727134T patent/PL2001639T3/pl unknown
- 2007-03-20 WO PCT/EP2007/052657 patent/WO2007107575A2/de active Application Filing
- 2007-03-20 EP EP12195434.1A patent/EP2567787B1/de active Active
- 2007-03-20 EP EP07727134A patent/EP2001639B1/de active Active
- 2007-03-20 JP JP2009500858A patent/JP2009530124A/ja active Pending
- 2007-03-20 US US12/225,433 patent/US8024996B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007107575A2 * |
Also Published As
Publication number | Publication date |
---|---|
US8024996B2 (en) | 2011-09-27 |
WO2007107575A2 (de) | 2007-09-27 |
WO2007107575A3 (de) | 2007-12-21 |
JP2009530124A (ja) | 2009-08-27 |
EP2567787A3 (de) | 2013-03-20 |
EP2567787A2 (de) | 2013-03-13 |
EP2567787B1 (de) | 2015-12-09 |
US20090107298A1 (en) | 2009-04-30 |
PL2001639T3 (pl) | 2013-05-31 |
DE202006004380U1 (de) | 2007-07-26 |
EP2001639B1 (de) | 2012-12-05 |
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