EP1260322B1 - Kraftgetriebener Winkelschrauber - Google Patents

Kraftgetriebener Winkelschrauber Download PDF

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Publication number
EP1260322B1
EP1260322B1 EP20020010518 EP02010518A EP1260322B1 EP 1260322 B1 EP1260322 B1 EP 1260322B1 EP 20020010518 EP20020010518 EP 20020010518 EP 02010518 A EP02010518 A EP 02010518A EP 1260322 B1 EP1260322 B1 EP 1260322B1
Authority
EP
European Patent Office
Prior art keywords
housing
offset
gear
drive
ring
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 - Lifetime
Application number
EP20020010518
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1260322A1 (de
Inventor
Holger Listl
Klaus Schmitz
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.)
C&E Fein GmbH and Co
Original Assignee
C&E Fein GmbH and Co
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 C&E Fein GmbH and Co filed Critical C&E Fein GmbH and Co
Publication of EP1260322A1 publication Critical patent/EP1260322A1/de
Application granted granted Critical
Publication of EP1260322B1 publication Critical patent/EP1260322B1/de
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
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose

Definitions

  • the invention relates to a power driven angle wrench with a housing comprising a main housing part in which a drive is received, with a coupled therewith reduction gear and one of them via a torque limiting clutch, which has a first and a second with the torque limiting clutch engaged therewith clutch part, driven spindle and an angle head having a spindle driven and angled tool spindle for driving a tool and an angle head housing angularly adjustably connected to the main body via an adjustment means, the speed reducer having a reaction torque relative to the spindle receiving reaction portion , which is rotatably connected at least during an adjustment of the adjusting device with the angle head housing and coupled via the adjusting device with the drive.
  • Such an angle wrench is from the DE-A-3919648 known.
  • the well-known angle wrench has a two-stage planetary gear, wherein the first planetary gear is driven by the engine and is coupled to the second planetary gear via a disengageable torque limiting clutch.
  • a disadvantage here is the fact that the two planetary gear stages are arranged spatially separated from each other at the two opposite ends of a housing part and are coupled together via the torque limiting coupling arranged therebetween. This leads to increased a relatively complicated assembly.
  • the invention has the object to improve an angle wrench according to the type mentioned in such a way that the structure and assembly are simplified.
  • the reduction gear can be designed as a structural unit to which the torque limiting clutch is coupled via the reaction part. This simplifies assembly and assembly and shortens the tolerance chain.
  • the torque acting on the adjusting device is smaller by the reduction factor of the reduction gear than that which acts between the reduction gear and the angle head. This makes it much easier and less massive to perform the adjustment than the known adjusting devices that produce an adjustable connection between the reaction part of the reduction gear and the angle head housing.
  • the two coupling parts there is no rotational movement of the two coupling parts when the torque limiting clutch is closed.
  • no appreciable centrifugal forces which lead to increased wear act on the coupling parts and, if appropriate, rolling elements arranged therebetween.
  • either the first or the second coupling part can be arranged axially displaceable in the housing. In order to allow a mutual rotatability of the two coupling parts, one of these parts must also be rotatably arranged in the housing.
  • the first coupling part is arranged displaceably in the axial direction in the housing and the reaction part with respect to the housing freely rotatable.
  • a switch for switching off the angle wrench is provided which can be actuated by the first coupling part.
  • reaction part is a ring gear of a planetary gear mechanism receiving a plurality of planetary gears.
  • planetary gearboxes Due to their distribution of forces, planetary gearboxes are particularly reliable and long-lasting, making them particularly suitable for power-driven angle screwdrivers in the commercial sector.
  • FIG. 1 an inventive, designed as a so-called rod angle screwdriver angle screwdriver is shown in a side view and designated 10 in total.
  • the angle wrench 10 has a housing 11 with a main housing part 12, on which a handle portion 16 is formed. From there, a main switch 18 is conveniently operated by an operator.
  • a angle head housing 19 of an angle head 20 is rotatably mounted, from which a tool holder 22 protrudes at right angles to a longitudinal axis of the angle wrench 10.
  • a rotary ring 28 is arranged rotatable relative to the main housing part 12. Slots 30 inserted therein, of which only the one facing the observer can be seen in FIG. 1, a tool can be introduced into the angle wrench 10, with which the release torque of the angle wrench 10 can be adjusted in a manner to be explained in more detail.
  • Fig. 2 shows a part of the angle wrench 10 shown in Fig. 1 with partially removed housing parts. The recognizable through the housing opening parts of the angle wrench 10 are indicated only schematically.
  • the angle wrench 10 has an example designed as an electric motor drive 32 which rotatably attached to a fixed relative to the main housing part 12 support sleeve 34 is.
  • the drive 32 drives via an intermediate shaft 36 to a reduction gear in the form of a planetary gear 38, which on the output side, a spindle 40 is rotated.
  • the spindle 40 drives a tool spindle 44 via a bevel gear arrangement 46 arranged in the angle head 20, which tool holder carries the tool holder 22 at its free end.
  • a torque limiting clutch 50 is shown schematically in Fig. 2, which couples a reaction torque with respect to the spindle 40 receiving reaction part of the planetary gear 38 with a control sleeve 52.
  • the adjusting sleeve 52 is integrally formed with an angle head housing 19 or rotatably connected via one or more intermediate parts with this.
  • the entire angle head 20, i. the angle head housing 19 with bearings 55 and 56 accommodated therein for the spindles 40 and 44 and the adjusting sleeve 52, relative to the support sleeve 34 fixed to the housing are rotated along an adjusting device 58 designed here as a screw connection.
  • the torque limiting clutch 50 is closed, the reaction part of the planetary gear 38 is fixed against rotation relative to the angle head 20 and coupled to the drive 32 via the adjusting device 58.
  • the spindle 40 is blocked by a tightly tightened screw, so that the torque generated by the drive 32 must be completely absorbed by the housing parts of the angle wrench 10.
  • On the intermediate shaft 36 between the drive 32 and the planetary gear 38 then acts the torque generated by the drive 32.
  • a corresponding counter-torque of the same magnitude is received by the housing parts, namely the carrier sleeve 34 and the adjusting sleeve 52, when the torque limiting clutch 50 is assumed to be closed.
  • This torque is smaller by the reduction factor of the planetary gear 38 than the torque acting between the planetary gear 38 and the angle head housing 19.
  • the adjustment device 58 can therefore be designed as a simple screw connection, which may have an additional locking mechanism. For reasons of torque transmission, however, such a locking mechanism is not required. If, nevertheless, such a known locking mechanism is desired, it may also be very simple and easy to construct, since it only needs to absorb small torques.
  • FIG. 3 shows in an axial section details of parts shown only schematically in FIG. 2 in the interior of the angle wrench 10.
  • an intermediate shaft 62 is pushed against rotation, which is integrally formed with a first sun gear 64 of the two-stage planetary gear 38.
  • the first sun gear 64 meshes with three first planetary gears 66 of a first planetary gear stage, of which only two can be seen in FIG.
  • the first planetary gears 66 are rotatably mounted on a first planet carrier 68 and mesh simultaneously with a ring gear 70 which extends over the entire axial length of the planetary gear 38.
  • the first planet carrier 68 is integrally formed with a second sun gear 72 or rotatably connected, which meshes with second planetary gears 74.
  • the second planet gears 74 are in turn rotatably mounted on a second planet carrier 76 and also mesh with the ring gear 70.
  • the ring gear 70 which assumes a reaction torque relative to the intermediate shaft 62 and the spindle 40 and thus represents the reaction part of the planetary gear 38, is rotatable via a bearing 88 in the carrier sleeve 34 bolted to the drive 32 and the adjusting sleeve 52 connected thereto via the adjusting device 58 added.
  • the ring gear 70 is fixed to the adjusting sleeve 52 (or a part rotatably connected thereto) via the torque limiting clutch 50.
  • This comprises a rotatably screwed into the ring gear 70 cam ring 90, which projects beyond the ring gear 70 shoulder 92 is also supported on the bearing 88 on the adjusting sleeve 52, and a switching ring 96 which is clamped by a compression spring 94 against the cam ring 90.
  • the switching ring 96 is axially, ie in the longitudinal direction 95 of the spindle 40, displaceable, however rotatably received in an associated with the adjusting sleeve 52 intermediate sleeve 98.
  • the rotationally fixed, but axially displaceable arrangement of the switching ring 96 is achieved by means of first and second longitudinal grooves 100 and 101, which are arranged on a circumferential surface of the switching ring 96 and the inside of the intermediate sleeve 98 and cooperate with guide balls 102.
  • first and second longitudinal grooves 100 and 101 guide balls 102
  • the switching ring 96 and the intermediate sleeve 98 can be moved to each other in the axial direction, wherein a snap ring inserted into the intermediate sleeve 98 105 prevents falling out of the guide balls 102.
  • rollers 104 are rotatably mounted on axles 106 circumferentially.
  • the rollers 104 can roll on a cam track 108, which is formed on a switching ring 96 facing the end face of the cam ring 90.
  • the compression spring 94 is supported on a clamping plate 110, which is accommodated in the intermediate sleeve 98 so as to be displaceable in the axial direction.
  • a clamping plate 110 On the clamping disk 110 four circumferentially uniformly distributed clamping bolts 112 act, which are guided in holes 114 which are mounted in a shoulder of the intermediate sleeve 98, and supported on a collar 116.
  • the adjusting ring 116 can be displaced by turning on a threaded portion 118 applied externally to the intermediate sleeve 98 in the longitudinal direction 95.
  • a longitudinal displacement of the adjusting ring 116 on the threaded portion 118 of the intermediate sleeve 98 is about the clamping bolt 112 and the clamping disc 110 transmitted to the compression spring 94, so that in this way the bias between the switching ring 96 and the cam ring 90 can be changed.
  • a tool for example a screwdriver
  • the adjusting ring 116 can be rotated together with the rotary ring 28 until the desired tension of the compression spring 94 and thus the triggering torque of the torque limiting clutch 50 is reached.
  • the rollers 104 are formed on the cam track 108 cams such that the force exerted on the ring gear 70 reaction torque on the cam, the rollers 104 and the switching ring 96 on the intermediate sleeve 98 and thereby on the rotatably associated adjusting sleeve 52 is transmitted, so that the ring gear 70 rests during the screwing of a screw.
  • the torque acting on the cam ring 90 increases until, finally, the cam ring 90 begins to rotate, lifting the rollers 104 and thus the switching ring 96 counter to the force of the compression spring 94 with its cams.
  • this runs with its cams under the rollers 104, so that the rollers 104 with the switching ring 96 finally lower again under the pressure of the compression spring 94.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP20020010518 2001-05-14 2002-05-10 Kraftgetriebener Winkelschrauber Expired - Lifetime EP1260322B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001124571 DE10124571A1 (de) 2001-05-14 2001-05-14 Kraftgetriebener Winkelschrauber
DE10124571 2001-05-14

Publications (2)

Publication Number Publication Date
EP1260322A1 EP1260322A1 (de) 2002-11-27
EP1260322B1 true EP1260322B1 (de) 2007-11-28

Family

ID=7685484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020010518 Expired - Lifetime EP1260322B1 (de) 2001-05-14 2002-05-10 Kraftgetriebener Winkelschrauber

Country Status (3)

Country Link
EP (1) EP1260322B1 (es)
DE (2) DE10124571A1 (es)
ES (1) ES2296842T3 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016216393A1 (de) 2016-08-31 2018-03-01 Robert Bosch Gmbh Werkzeug mit variablem Handgriff

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
CN101941193A (zh) * 2010-08-13 2011-01-12 宁波汉浦工具有限公司 电动螺丝批
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE354440B (es) * 1971-05-19 1973-03-12 Atlas Copco Ab
JPS52151998A (en) * 1976-06-14 1977-12-16 Olympic Fishing Tackles Co Torque controlling device of motor tool
US4346765A (en) * 1979-02-21 1982-08-31 Cooper Industries, Inc. Speed responsive motor shutoff mechanism for fluid operated tool
DE3919648C2 (de) * 1989-06-16 1998-01-29 Bosch Gmbh Robert Winkelschrauber
DE4123349C1 (de) * 1991-07-15 1993-03-04 Fein C & E Schrauber mit variabler Drehmomenteinstellung
SE503326C2 (sv) * 1994-07-08 1996-05-28 Atlas Copco Tools Ab Vinkelmutterdragare

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016216393A1 (de) 2016-08-31 2018-03-01 Robert Bosch Gmbh Werkzeug mit variablem Handgriff

Also Published As

Publication number Publication date
EP1260322A1 (de) 2002-11-27
DE10124571A1 (de) 2002-11-21
ES2296842T3 (es) 2008-05-01
DE50211272D1 (de) 2008-01-10

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