EP2334472A1 - Machine-outil manuelle équipée d un mécanisme commutable - Google Patents

Machine-outil manuelle équipée d un mécanisme commutable

Info

Publication number
EP2334472A1
EP2334472A1 EP09781731A EP09781731A EP2334472A1 EP 2334472 A1 EP2334472 A1 EP 2334472A1 EP 09781731 A EP09781731 A EP 09781731A EP 09781731 A EP09781731 A EP 09781731A EP 2334472 A1 EP2334472 A1 EP 2334472A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
tool according
gear
spring
spring 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.)
Granted
Application number
EP09781731A
Other languages
German (de)
English (en)
Other versions
EP2334472B1 (fr
Inventor
Heiko Roehm
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2334472A1 publication Critical patent/EP2334472A1/fr
Application granted granted Critical
Publication of EP2334472B1 publication Critical patent/EP2334472B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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 hand tool with a switchable mechanism according to the preamble of claim 1.
  • a cordless screwdriver which has an electric drive motor, via a multi-stage planetary gear rotatably mounted in a housing tool holder for receiving a tool is driven by the drive motor.
  • cordless screwdrivers are usually equipped with a switchable planetary gear that between a first gear stage with slow rotational speed and high torque and a second gear with higher
  • Rotation speed and lower torque can be switched. Switching takes place by means of a gear change switch, which can be manually adjusted in the form of a slide on the outside of the housing in the axial direction and thereby shifts a switching ring gear between two switching positions.
  • the switching ring gear acts on a gear of the planetary gear, which is coupled in a first switching position with the housing and in a second switching position with a planet carrier of the planetary gear.
  • spring elements may be provided which apply force to the switching ring gear after the corresponding actuation of the change-over switch in the desired switching position, so that only after stopping the
  • the force of the spring elements must be matched to the force of another spring element with which the gear changeover switch is securely held in its respective switching positions to prevent accidental adjustment of the gear changeover switch.
  • the spring force acting on the gear change switch must not be too high in order to ensure ergonomic actuation of the gear changeover switch.
  • the invention is based on the object, a hand tool with a switchable between at least two operating positions mechanics with simple constructive measures so that under different operating conditions, especially under load, a change between the operating positions with reduced component load is reliable and ergonomic feasible ,
  • the hand tool according to the invention is equipped with a switchable mechanism which has at least two operating positions which are to be inserted via a control element.
  • the operating element is coupled via a coupling element with an adjustable switching element, which acts on at least one mechanical component of the switchable mechanism.
  • the coupling element, which transmits the adjusting movement of the operating element mounted on the mechanism housing switching element is designed as a bistable coupling spring, in the two switching positions of the control element a stable position and in an intermediate position, the coupling spring in the Passage transfer between the switching positions, assumes an unstable position.
  • the coupling spring is a dual function, namely on the one hand, the motion transmission to the switching element and the other the application of force in the respective switching position, so that it can be dispensed with one or more additional spring elements, with which the switching device is subjected to force in the respective switching position. Overall, this component simplification and component reduction is achieved.
  • the coupling spring as a spring ring, which is preferably pivotally mounted about a transverse axis, which extends transversely to the engine longitudinal axis of the power tool.
  • the bistability is preferably achieved by biasing the spring ring or at least supported, whereby the spring ring in the two pivoted positions assumes a stable position, whereas in an intermediate position of the spring ring is unstable.
  • the unstable intermediate layer supports the achievement of the other switching position in which the spring ring resumes its stable position.
  • the bias of the spring ring is an easy to betechnikstelligende measure to keep the spring element stable in the respective switching position. This also provides a high level of security against accidental adjustment of the operating element during operation of the power tool - A -
  • the hand tool machine is equipped with a switchable, multi-stage gear mechanism, which has at least two gear ratios, which are to be inserted via a gear changeover switch as a control element.
  • the gear change switch is coupled via the coupling element with the adjustable switching element, which acts on at least one transmission component of the shiftable transmission.
  • the adjustable switching element is expediently designed as a switching ring gear, which is to be adjusted in the transmission housing axially between a housing-fixed locking position and a gear-side locking position, wherein in the housing side
  • the pivotability of the spring ring is preferably realized in that on the spring ring pivot members are formed, which are supported in corresponding recesses in the housing of the power tool and define a transverse to the longitudinal axis of the power tool pivot axis.
  • These pivoting members are preferably designed as pivoting lugs on the radially inner side of the spring ring, wherein basically also a design on the radial outer side of the spring ring comes into consideration. Furthermore, a reverse embodiment is possible in the
  • Pivoting projections are arranged on the housing and protrude into associated Schwenkaussure on the spring ring, which are arranged either on the radially inner side or on the radial outer side of the spring ring.
  • the contact between the spring ring and the gear change is expediently via an externally projecting driver on Achieved spring ring, preferably axially from the gear change - parallel to the longitudinal axis of the
  • Pivoting movement of the spring ring implemented, which is coupled to the switching element, which is preferably mounted as well as the gear change switch axially in the gear housing and can perform an adjusting movement in the axial direction.
  • the connection between the spring ring and the switching member via fingers on the spring ring, which are preferably formed as one piece with the spring ring as well as the pivot members and the driver.
  • the embodiment as fingers, which extend in particular radially inward on the spring ring, offers the further advantage that a further spring effect is achieved via the fingers, which is effective between the spring ring and the switching element.
  • This spring action can be used for a gear selection, especially in the event that a gear shift is performed during operation of the hand tool, the switching element or a transmission component, which is related to the switching element, not transferred due to speed differences in the desired engagement position can be.
  • the desired gear ratio can be preselected via the adjustment of the gear change switch, wherein due to the spring action of the finger on the spring ring, the switching element is adjusted without component damage in the direction of the desired switching position, which is achieved only after a stop of the drive motor or the restarting.
  • the fingers on the spring ring thus another spring effect is achieved without the need for another component is required.
  • the spring ring may be formed as a semicircle or as a full circle.
  • the pivot members are conveniently between the fingers, which make the connection to the switching member, and the driver, which is actuated by the gear change switch.
  • the fingers are preferably located on the free end faces of the semicircular spring ring and project radially inwards.
  • the pivot members diametrically opposite to the driver, wherein the fingers are arranged offset by 90 ° to the pivot members or the driver.
  • the axis of rotation is adjacent to the inside of the spring ring in the form of a tangent. Due to the bias of the fully circular spring ring takes in its two switching positions each an approximately conical shape.
  • the coupling spring is expediently designed as a metal part, in particular as a sheet metal part.
  • Fig. 1 shows a hand tool, which is designed as a cordless screwdriver or cordless drill and the transmission between a first and a second gear is adjustable, wherein an external gear change switch is provided for switching between the gear ratios, via a coupling spring with a Switching element is connected to actuate the transmission,
  • the hand tool 1 shown in Fig. 1 is designed as a cordless screwdriver or cordless drill and has a motor housing 2, which also forms the handle housing and on the underside of a battery pack 3 for powering the electric drive motor 4 is arranged interchangeable.
  • the drive motor 4 drives a arranged in a gear housing 5 planetary gear 6, which is coupled to a spindle, which is a carrier of a tool holder 7 for receiving a tool.
  • a switch 8 is provided in the motor housing, which is to be operated by the operator via a switch pawl or a switch lever 9.
  • the direction of rotation of the drive motor is set via a reversing switch 10.
  • the planetary gear 6 is executed at least one stage, but preferably two or more stages.
  • two different gear ratios can be adjusted via a switching device, wherein in a first gear, a lower speed with higher torque and in a second gear, a higher speed with less torque is transmitted from the drive motor to the spindle for receiving the tool.
  • the switching device for shifting between the gear stages comprises a gear change switch 11 designed as a shift slide on the outside of the transmission housing 5, a coupling spring 12 and a shift member 13 located within the transmission housing 5, via which a transmission part is to be adjusted between different shift positions.
  • the gear change switch 11 can be adjusted by the operator in the axial direction of the drive motor axially between the two switching positions.
  • the adjusting movement of the changeover switch 11 is transmitted via the pivotally mounted in the transmission housing 5 coupling spring 12, which is preferably designed as a spring ring, on the inside of the transmission housing axially adjustably mounted switching member 13 whose adjusting movement acts on the transmission part.
  • the relevant transmission part is designed in particular as Geretehohlrad, between a housing-fixed locking position and a rotationally fixed with a Planet carrier of the planetary gear coupled locking position is to adjust.
  • the switching member 13 and the Geretehohlrad can be designed as a common component.
  • the coupling spring 12 is formed as a semi-circular spring ring and is made of metal, in particular sheet metal.
  • a radially outwardly directed, angular driver 14 which is acted upon in the installed position of the gear change switch 11.
  • Adjacent to the free end faces of the spring ring radially inwardly pointing finger 16 are formed, which actuate the switching member 13 (Fig. 1) in the installed position.
  • nose-shaped pivot members 15 are formed on the spring ring, via which the spring element is pivotally mounted in the gear housing of the power tool.
  • the two nose-shaped pivot members 15 on the radially inner side engage in associated recesses in the housing and define a
  • Pivot axis 17 about which the coupling spring 12 is to pivot.
  • the pivot axis 17 extends transversely to the longitudinal axis or motor axis, around which also the spindle and the tool holder rotate.
  • the driver 14, the pivot members 15 and the fingers 16 are each formed integrally with the coupling spring 12.
  • the fingers 16 protrude radially further inwardly than the pivot members 15, whereby the fingers 16 can develop an elastic effect in the axial direction of the hand tool, so that the fingers 16 have the function of a spring element in the axial direction, with which the switching member 13 (FIG. resiliently acted upon.
  • the fingers 16 are angularly offset with respect to the radially outwardly facing driver 15 by 90 °, the pivot members 15 on the inside of the spring ring are located approximately in the middle between driver 14 and fingers sixteenth
  • the coupling spring 12 In the installed position, the coupling spring 12 is biased, such that the coupling spring assumes a stable, non-planar position in each of the two switch positions. In the transition between the two switching positions, each representing end positions, the coupling spring 12 passes through an unstable position. After the unstable position is exceeded, the coupling spring jumps into the opposite end position or switching position, which is thus under spring tension.
  • Fig. 3 is another embodiment of a
  • the coupling spring 12 is designed as a solid ring, wherein the radially outwardly projecting driver 14, the nose-shaped pivot members 15 which protrude radially inwardly, is arranged diametrically opposite one another.
  • the two fingers 16 also protrude radially inwards, they are arranged offset in angle to both the driver 14 and the two pivot members 15 by 90 °.
  • the two pivot members 15 which define the pivot axis 17 are directly adjacent to each other at a broken point of the spring ring.
  • the pivot axis 17 extends approximately tangentially to the inside of the spring ring. In the installed position, the coupling spring 12 is biased by the pivot members 15 are brought into coverage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Retarders (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Structure Of Transmissions (AREA)

Abstract

L'invention concerne une machine-outil manuelle équipée d'un mécanisme commutable entre au moins deux positions de service qui sont mises en fonction au moyen d'un élément de commande réglable (11), l'élément de commande étant accouplé par un élément d'accouplement à un organe de commutation réglable (13). L'élément d'accouplement est réalisé sous la forme d'un ressort d'accouplement bistable (12).
EP09781731.6A 2008-09-12 2009-08-12 Machine-outil manuelle équipée d un mécanisme commutable Active EP2334472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008042033A DE102008042033A1 (de) 2008-09-12 2008-09-12 Handwerkzeugmaschine mit einer schaltbaren Mechanik
PCT/EP2009/060414 WO2010028924A1 (fr) 2008-09-12 2009-08-12 Machine-outil manuelle équipée d’un mécanisme commutable

Publications (2)

Publication Number Publication Date
EP2334472A1 true EP2334472A1 (fr) 2011-06-22
EP2334472B1 EP2334472B1 (fr) 2018-10-10

Family

ID=41170974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09781731.6A Active EP2334472B1 (fr) 2008-09-12 2009-08-12 Machine-outil manuelle équipée d un mécanisme commutable

Country Status (6)

Country Link
US (2) US9089954B2 (fr)
EP (1) EP2334472B1 (fr)
CN (1) CN102149518B (fr)
DE (1) DE102008042033A1 (fr)
RU (1) RU2527498C2 (fr)
WO (1) WO2010028924A1 (fr)

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DE102006059078A1 (de) * 2006-12-14 2008-06-19 Robert Bosch Gmbh Elektrogerät mit aufgerastetem drehbarem Bedienungselement
DE102008042033A1 (de) * 2008-09-12 2010-03-18 Robert Bosch Gmbh Handwerkzeugmaschine mit einer schaltbaren Mechanik
DE102009005248A1 (de) † 2009-01-13 2010-07-15 C. & E. Fein Gmbh Elektrowerkzeug mit schaltbarem Getriebe
GB2474113B (en) * 2009-10-02 2012-01-11 Bosch Gmbh Robert Operating control in a power handtool
DE102010030307B4 (de) 2009-10-02 2022-09-29 Robert Bosch Gmbh Handwerkzeugmaschine mit einer schaltbaren Mechanik
US9108312B2 (en) 2012-09-11 2015-08-18 Milwaukee Electric Tool Corporation Multi-stage transmission for a power tool
US9908228B2 (en) 2012-10-19 2018-03-06 Milwaukee Electric Tool Corporation Hammer drill
DE102014210343A1 (de) * 2013-06-03 2014-12-04 Robert Bosch Gmbh Handwerkzeugmaschine mit einem schaltbaren Getriebe
US10418879B2 (en) * 2015-06-05 2019-09-17 Ingersoll-Rand Company Power tool user interfaces
WO2016196918A1 (fr) 2015-06-05 2016-12-08 Ingersoll-Rand Company Interfaces utilisateur d'outil électrique
US11260517B2 (en) 2015-06-05 2022-03-01 Ingersoll-Rand Industrial U.S., Inc. Power tool housings
WO2016196984A1 (fr) 2015-06-05 2016-12-08 Ingersoll-Rand Company Machines portatives à moteur à modes de fonctionnement sélectionnables par l'utilisateur
WO2016196979A1 (fr) 2015-06-05 2016-12-08 Ingersoll-Rand Company Outils de percussion avec fonctionnalités d'alignement de couronne dentée

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Also Published As

Publication number Publication date
RU2011113842A (ru) 2012-10-20
EP2334472B1 (fr) 2018-10-10
DE102008042033A1 (de) 2010-03-18
US20110259620A1 (en) 2011-10-27
US20150283692A1 (en) 2015-10-08
US9089954B2 (en) 2015-07-28
CN102149518A (zh) 2011-08-10
US10005176B2 (en) 2018-06-26
WO2010028924A1 (fr) 2010-03-18
RU2527498C2 (ru) 2014-09-10
CN102149518B (zh) 2015-09-09

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