EP2618966B1 - Handwerkzeugmaschine, insbesondere schlagbohrmaschine - Google Patents

Handwerkzeugmaschine, insbesondere schlagbohrmaschine Download PDF

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Publication number
EP2618966B1
EP2618966B1 EP11754399.1A EP11754399A EP2618966B1 EP 2618966 B1 EP2618966 B1 EP 2618966B1 EP 11754399 A EP11754399 A EP 11754399A EP 2618966 B1 EP2618966 B1 EP 2618966B1
Authority
EP
European Patent Office
Prior art keywords
power tool
housing
portable power
heat dissipating
receiving part
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.)
Active
Application number
EP11754399.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2618966A1 (de
Inventor
Jens Blum
Heiko Roehm
Tobias Herr
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 EP2618966A1 publication Critical patent/EP2618966A1/de
Application granted granted Critical
Publication of EP2618966B1 publication Critical patent/EP2618966B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism
    • B25D11/102—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool
    • B25D11/106—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool cam member and cam follower having the same shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/20—Devices for cleaning or cooling tool or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0057—Details related to cleaning or cooling the tool or workpiece
    • B25D2217/0061—Details related to cleaning or cooling the tool or workpiece related to cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/121—Housing details

Definitions

  • the invention relates to a hand tool, such as a percussion drill according to the preamble of claim 1.
  • the detent mechanism comprises a housing-side detent mechanism receiving part, the front side has a circumferential, sinusoidal wave profile, which cooperates to generate the impact function with a rotating detent disk which is fixedly connected to the drive spindle of the power tool.
  • the drive spindle carries a tool holder and is driven by the motor shaft of the electric drive motor.
  • a percussion drill which is equipped with a detent mechanism for generating a beating function.
  • the detent mechanism comprises a detent work receiving part, which is arranged fixed to the housing, and a detent disk, which is connected to a shaft of the power tool.
  • the detent receiving part is received in a support member made of light metal and inserted into a plastic housing part.
  • the carrier part has an end-side section over which Heat is radiated to the environment.
  • the support member is formed as a cylindrical body, in which the detent mechanism receiving part is inserted.
  • the carrier part has a step on which the detent-work receiving part is axially supported.
  • the invention is based on the object with simple design measures, a hand tool that is provided with a detent work to form reliable.
  • the hand tool of the invention which is preferably a percussion drill, has a drive motor, in particular an electric drive motor, via which a tool holder is driven, in which a tool can be used.
  • the hand tool machine is equipped with a detent mechanism, which comprises a housing-side detent work receiving part and a detent disk, which is connected to a drive spindle or the tool holder, wherein the tool holder is seated on the drive spindle.
  • the drive spindle is driven by the motor shaft of the drive motor, wherein usually a transmission for movement transmission is arranged between the motor shaft and the drive spindle, for example a planetary gear.
  • the detent housing receiving part fixed in the direction of rotation is in contact with a heat dissipation part which is arranged in the housing or in a transmission housing is.
  • the heat dissipation member is formed as an independent component, which is arranged fixed to the housing, but is not part of the housing.
  • the heat dissipation member can be optimized for its heat dissipating function.
  • the heat dissipation part is formed in particular over a large area and consists of a material with high thermal conductivity.
  • heat is first transferred to the heat dissipation part by heat conduction, in which heat propagates according to the same principle.
  • the delivery of heat from the heat dissipation part to the environment is predominantly by heat radiation or by convection.
  • the heat dissipation member axially supports the detent receiving member in the housing, the heat dissipation member simultaneously exerting an axial force on the detent action receiving member.
  • the detent receiving part is axially fixed in the housing by being acted upon by the heat dissipation member.
  • the heat dissipation member advantageously extends to the tool holder, in particular up to a gap between the end face of the housing and the tool holder, so that in a rotating drill chuck the air flow generated in this case contributes to the cooling of the heat dissipation member.
  • the tool receiving part is fastened via fastening elements, for example screws in the housing of the power tool.
  • the fasteners can at the same time position fix different parts of the housing or other components of the power tool to each other.
  • the heat dissipation member forms an axial stop for a Kupplungseinstellring the hand tool.
  • the heat dissipation part furthermore forms a sealing gap with the respectively adjacent component on the inner diameter and / or on the outer diameter.
  • the detent work receiving part is adjacent to the end of the housing facing the tool holder, wherein spindle bearings, which serve to support the drive spindle, are axially positioned on the side facing away from the detent work receiving part in the housing.
  • the detent receiving part can be arranged near the front side, accordingly, the heat dissipation part is adjacent to the front side, which favors the heat dissipation to the environment.
  • the heat dissipation part is pot-shaped.
  • a central recess is introduced, which surrounds the detent receiving part.
  • the delimiting wall of the recess in the pot bottom expediently acts on the detent work receiving part, in particular retaining flanges, which are formed on the detent work receiving part.
  • the cup-shaped design has the further advantage that over the pot wall or the pot bottom, a spring action for the axial fixation of the detent work receiving part is achieved. About the cylindrical Topfwandung takes place, the heat dissipation in the direction of the end face of the housing, up to which the upper pot edge of the pot wall extends.
  • the heat dissipation part consists of a material with good thermal conductivity, in particular of metal.
  • the portable power tool 1 shown in the figures is designed as a cordless impact drill and has a housing 2 in a schematically illustrated electric drive motor 3, which drives a drive spindle 5 via a arranged in a gear housing 4a gear 4, which is preferably designed as a planetary gear, the carrier of a chuck 6 with a tool holder 7 is.
  • the drive spindle 5 is rotatably supported in the housing via two spindle bearings 8 and 9.
  • the first spindle bearing 8, which to the front 2a has the greater axial distance, is fixed to the housing, the second spindle bearing 9 is designed as a floating bearing and slidably held in the axial direction.
  • the second spindle bearing 9 closer to the end face 2a is supported axially by a spring element 10 on the first spindle bearing 8.
  • the hand tool 1 is provided with a detent mechanism 11 which comprises a detent work receiving part 12 and a detent disk 13.
  • the detent mechanism receiving part 12 is fixedly connected to the transmission housing.
  • the drive spindle 5 is mounted displaceably in the axial direction relative to the transmission housing 4a.
  • the annular locking disc 13 is fixedly connected to the drive spindle 5, it is located within the gear housing 4a and can rotate in the gear housing 4a.
  • the detent mechanism receiving part 12 has a circumferentially circumferential, sinusoidal or sawtooth-like wave profile 14, which comes with an axial approach between the detent mechanism receiving part 12 and locking plate 13 in contact with a locking cam on the locking disc 13 so that the rotating detent disc 13th scans the contour of the wave profile 14 on the detent work receiving part 12 and thereby an axial relative movement is formed, which corresponds to the wave profile.
  • the contact between the Rastentechnikabilityteil 12 and the locking disc 13 takes place when the tool is pressed in the tool holder 7 against a workpiece to be machined, whereby the approach between the components 12 and 13 of the locking mechanism 11 takes place against the force of the spring element 10.
  • a cup-shaped heat dissipation member 15 is integrated, which is fixed to the housing and is in contact with the detent receiving part 12.
  • frictional heat which results from the relative rotational movement between the detent disk 13 and the detent work receiving part 12, is discharged to the outside.
  • the heat dissipation part 15 has a pot bottom 16, in which a recess is introduced, which surrounds the detent work receiving part 12.
  • the central recess in the bottom of the pot 16 limiting wall abuts against the lateral surface of the detent work receiving part 12.
  • the recess of the limiting part of the wall in the bottom of the pot supports the detent work receiving part 12 by the wall on a retaining flange or at several, on the circumference distributed retaining flanges 19 is applied, which are integrally formed with the detent work receiving part 12.
  • the heat dissipation member 15 exerts an axial force on the detent mechanism receiving part 12 and fixes it in this way in the housing.
  • the retaining flanges 19 engage over the second spindle bearing 9 in the axial direction, the annular body of the detent mechanism receiving part 12 carrying the retaining flanges 19 being located between the second spindle bearing 9 and the end face 2a.
  • the pot wall 10 of the heat dissipation part 15 extends in the axial direction to the front face 2 a, which faces the drill chuck 6, but lies at an axial distance from the chuck 6.
  • a radially outwardly umkragender edge 18 on the pot wall 17 is located in the immediate vicinity of the end face 2a.
  • the heat dissipation part 15 is held in the housing 2 via fastening elements designed as screws 20.
  • the screws 20 are guided parallel to the central recess through the pot bottom 16 and anchor the heat dissipation member 15 at portions of the transmission housing.
  • the screws 20 can in this case also connect different parts of the transmission or the transmission housing with each other.
  • the pot-shaped heat dissipation member 15 is made of a metal or other material with high sauceleitschreibkteit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP11754399.1A 2010-09-20 2011-09-07 Handwerkzeugmaschine, insbesondere schlagbohrmaschine Active EP2618966B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010041045A DE102010041045A1 (de) 2010-09-20 2010-09-20 Handwerkzeugmaschine, insbesondere Schlagbohrmaschine
PCT/EP2011/065455 WO2012038254A1 (de) 2010-09-20 2011-09-07 Handwerkzeugmaschine, insbesondere schlagbohrmaschine

Publications (2)

Publication Number Publication Date
EP2618966A1 EP2618966A1 (de) 2013-07-31
EP2618966B1 true EP2618966B1 (de) 2018-11-14

Family

ID=44583053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11754399.1A Active EP2618966B1 (de) 2010-09-20 2011-09-07 Handwerkzeugmaschine, insbesondere schlagbohrmaschine

Country Status (5)

Country Link
US (1) US9682468B2 (zh)
EP (1) EP2618966B1 (zh)
CN (1) CN103108726B (zh)
DE (1) DE102010041045A1 (zh)
WO (1) WO2012038254A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011017579A1 (de) * 2011-04-27 2012-10-31 Hilti Aktiengesellschaft Werkzeugmaschine und Steuerungsverfahren
US20140338940A1 (en) * 2013-05-14 2014-11-20 Black & Decker Inc. Clutch and hammer assemblies for power tool
JP6855096B1 (ja) * 2020-09-17 2021-04-07 株式会社丸高工業 電動工具

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1315903A (en) 1970-06-16 1973-05-09 Metabowerke Kg Percussive drills
DE2323268C3 (de) * 1973-05-09 1983-01-27 Robert Bosch Gmbh, 7000 Stuttgart Schlagbohrmaschine
DE3239283A1 (de) * 1981-11-13 1983-05-19 Black & Decker, Inc., 19711 Newark, Del. Motorgetriebenes werkzeug, insbesondere elektrowerkzeug mit einem kunststoffgehaeuse
GB2232372A (en) * 1989-05-25 1990-12-12 Black & Decker Inc Improvements in or relating to power tools
GB2275644B (en) * 1993-03-05 1995-12-13 Black & Decker Inc Chuck spindle device and power tools incorporating same
DE502006001594D1 (de) 2006-03-18 2008-10-30 Metabowerke Gmbh Elektrohandwerkzeuggerät
JP5477759B2 (ja) 2008-07-30 2014-04-23 日立工機株式会社 電動工具
DE102008064511B4 (de) 2008-12-22 2011-07-21 Metabowerke GmbH, 72622 Schlagbohrmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US9682468B2 (en) 2017-06-20
WO2012038254A1 (de) 2012-03-29
DE102010041045A1 (de) 2012-03-22
US20130248217A1 (en) 2013-09-26
EP2618966A1 (de) 2013-07-31
CN103108726A (zh) 2013-05-15
CN103108726B (zh) 2016-08-03

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