EP2176036B1 - Handwerkzeugmaschine mit federeinheit - Google Patents

Handwerkzeugmaschine mit federeinheit Download PDF

Info

Publication number
EP2176036B1
EP2176036B1 EP08760367.6A EP08760367A EP2176036B1 EP 2176036 B1 EP2176036 B1 EP 2176036B1 EP 08760367 A EP08760367 A EP 08760367A EP 2176036 B1 EP2176036 B1 EP 2176036B1
Authority
EP
European Patent Office
Prior art keywords
unit
drive
spring unit
eccentric
power tool
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.)
Not-in-force
Application number
EP08760367.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2176036A1 (de
Inventor
Joachim Hecht
Gerd Schlesak
Klaus Kuespert
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 EP2176036A1 publication Critical patent/EP2176036A1/de
Application granted granted Critical
Publication of EP2176036B1 publication Critical patent/EP2176036B1/de
Not-in-force 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
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • 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
    • 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
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • 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
    • B25D17/24—Damping the reaction force
    • 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
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons
    • 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
    • B25D2250/085—Elastic behaviour of tool components
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other
    • 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
    • B25D2250/371—Use of springs

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • the hand tool has a drive unit arranged in a housing, with which a tool holder can be driven in a hammering manner. A part of the housing is designed as an actuating handle.
  • the hand tool machine has a second handle, which is designed in particular for guiding or holding oscillating devices, in that the handle has a vibration damping device.
  • the handle on a handle element, in which the damping device is integrated.
  • the invention is based on a hand-held power tool, in particular a drill and / or chisel hammer, with a drive unit and a percussion unit, which has a gear unit and a piston that can be driven bidirectionally displaceably by the drive unit, and with at least one first gear unit in the direction of action the drive unit between the drive unit and the piston provided spring unit.
  • the transmission unit is an eccentric drive with a two-part eccentric disk, the eccentric disk having a drive disk and an output disk coupled to the drive disk via the at least one first spring unit.
  • the vibration damping is particularly space-saving and cost-effectively integrated into the eccentric disc.
  • the eccentric disc is carried out particularly stable by the two-part design and the integration of the spring units.
  • spring units are provided which have either one effective direction or two effective directions. The fact that the at least one first spring unit can be integrated into an existing construction, this has no effect on the overall length of the power tool or on the gear unit of the power tool.
  • the vibration damping takes place here advantageously without the expenditure of additional energy.
  • the vibration damping system according to the invention responds directly to the compression pressure, so that the system is independent of the mode and the load on the transmission of the power tool.
  • the drive unit acts on the piston via the gear unit with a drive force and is preferably designed as an electric motor.
  • the term "spring unit” should be understood as meaning, in particular, mechanical, hydraulic and / or pneumatic springs as well as gas cushions as well as all spring devices which appear appropriate to a person skilled in the art.
  • the term "effective direction of the drive unit” should be understood to mean, in particular, the direction of the force flow of the drive force on the piston.
  • beater units two movable parts designed as pistons and beaters, which are accommodated axially behind one another in a separate guide tube fixed relative to the moving parts and are guided axially, bidirectionally displaceably, are to be understood here as “beater units”, the beater in a known manner can be activated via the piston, which can be moved by the drive, via an air cushion.
  • a “gear unit” is to be understood in particular as meaning a unit for transmitting the driving force of the drive unit and / or for converting the driving force present as rotational or rotational movement into a linear or lifting movement. It can be used all, the expert appear appropriate gear arrangements.
  • the gear unit is formed by the following elements, namely the part of the motor shaft from an upper edge of the Electric motor and the transmission of the driving force from the electric motor to the piston of the percussion unit drivingly coupled, further transmission means, such as a connecting rod.
  • a gear means as in the present exemplary embodiments, is formed by a motor shaft, which is expressly also to be regarded as part of the gear unit, in particular the drive unit can be made particularly space-saving.
  • a center of gravity of the drive unit can advantageously be adjusted in its position to marginal conditions.
  • a "motor shaft” should be understood to mean, in particular, a shaft which can be driven directly by means of a turbine unit and / or by means of an electromagnetic unit of the drive unit.
  • the piston is offset from a starting position in a reciprocating, axial stroke movement in the guide tube, wherein an air cushion is alternately compressed and relaxed in a compression chamber.
  • the racket is accelerated by the compression pressure and gives its energy in the form of a punching power to a tool.
  • the eccentric drive has an eccentric pin, a connecting rod and a piston pin, wherein a further spring unit between the eccentric pin and the connecting rod or between the connecting rod and the piston pin or in the connecting rod or between the piston pin and the piston is provided.
  • the at least one first spring unit is a mechanical, hydraulic and / or pneumatic spring and / or a gas cushion.
  • the free choice of different types of springs allows for accurate tuning of the damping system.
  • about the nature of the at least one spring unit both spring force and travel are selectable or adjustable.
  • the at least one first spring unit is a compression spring, as a result of which the gear unit or the damping system can be produced in a structurally simple and particularly cost-effective manner.
  • the at least one first spring unit is an element made of an elastic material. This is a special cost-effective solution possible, since a simple production of the spring element is feasible.
  • the figures show schematic diagrams of part of a trained as an electric hammer hand tool.
  • the electric hammer has a arranged in a housing 48, in Fig. 1 visible drive unit 10 and a percussion unit 12.
  • the drive unit 10 is preferably designed as an electric motor.
  • the drive unit 10 acts via a gear unit 14a on the hammer mechanism unit 12, wherein the gear unit 14a is designed as an eccentric drive.
  • the percussion unit 12 comprises two formed as a piston 18 and racket 20 movable parts, which are received in a separate, fixed relative to the moving parts guide 16 axially one behind the other and axially, bidirectionally slidably guided.
  • the guide 16 is preferably formed as a tube.
  • the drive unit 10 drives the piston 18, which is displaceably arranged in the guide tube 16, via the gear unit 14a.
  • An axis of the guide tube 16 is aligned with the axis of a tool holder, not shown, in which a tool is receivable.
  • a transmitted from the engine 10 to the gear unit 14a rotational movement is converted into a linear lifting movement of a connecting rod 26a-26g and transmitted via the piston 18 to the racket 20.
  • the piston 18 via the drive unit 10 from an example in Fig. 1 shown starting position in a reciprocating, axial stroke movement in the guide tube 16, wherein the air cushion in the compression chamber 50 is alternately compressed and relaxed.
  • the racket 20 is accelerated by the compression pressure and gives its energy to the tool.
  • the gear unit 14a is designed as an eccentric drive and comprises a motor shaft 52, an eccentric disc 30a, 30b with an eccentric pin 24 and a connecting rod 26a-26g with a piston pin 28.
  • the eccentric disc 30a, 30b is driven by the motor 10 via the gear unit 14a.
  • the eccentric disc 30a, 30b is mounted via an eccentric shaft 54 in the housing 48 of the power tool.
  • the eccentric disc 30a, 30b is connected via the eccentric pin 24 with the connecting rod 26a-26g.
  • the connecting rod 26a-26g is connected by the piston pin 28 with the piston 18 of the percussion unit 12, which is operatively connected to the racket 20 and acts on the racket 20.
  • Fig. 6 shows the hand tool according to the invention with a designed as an eccentric 14a gear unit having a two-part eccentric disc 30a, namely a drive pulley 32a, 32b and a drive pulley 32a, 32b coupled to the output pulley 34, the drive pulley 32a, 32b via the first spring unit 22b, 22c is coupled to the driven pulley 34.
  • the motor shaft 52 drives the drive pulley 32a, 32b, which drives the driven pulley 34 via the spring units 22b, 22c.
  • Fig. 7 shows the eccentric disc 30a Fig. 6 in a first variant.
  • Fig. 8 shows the eccentric disc 30a Fig. 6 in a second variant.
  • two spring units 22c are again provided between the drive pulley 32b and the driven pulley 34, which, however, can effect a force reduction in two directions of action or directions of rotation 36, 38.
  • the further spring unit 22a may be provided between the connecting rod 26b and the piston pin 28.
  • a further embodiment according to Fig. 4 is the other spring unit 22a provided on or in the connecting rod 26c by the connecting rod 26c made in two parts and the spring unit 22a is provided between the two parts. As a result, the two parts of the connecting rod 26c can be moved against each other.
  • the further spring unit 22a according to FIG Fig. 5 be arranged between the piston pin 28 and the piston 18, in such a way that the piston pin 28 is slidably mounted in the piston 18.
  • the at least one first spring unit 22b, 22c and in the other spring unit 22a, 22d, 22f may be at least one mechanical, hydraulic and / or pneumatic spring and / or a gas cushion.
  • the spring unit 22a-22e is designed as a compression spring.
  • it may according to Fig. 9 but also an element 22d of a resilient material or according to Fig. 10 to act an element 22e with two opposing spring elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Transmission Devices (AREA)
  • Drilling And Boring (AREA)
EP08760367.6A 2007-07-30 2008-06-02 Handwerkzeugmaschine mit federeinheit Not-in-force EP2176036B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007035699A DE102007035699A1 (de) 2007-07-30 2007-07-30 Handwerkzeugmaschine
PCT/EP2008/056781 WO2009015924A1 (de) 2007-07-30 2008-06-02 Handwerkzeugmaschine mit federeinheit

Publications (2)

Publication Number Publication Date
EP2176036A1 EP2176036A1 (de) 2010-04-21
EP2176036B1 true EP2176036B1 (de) 2015-10-14

Family

ID=39721969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08760367.6A Not-in-force EP2176036B1 (de) 2007-07-30 2008-06-02 Handwerkzeugmaschine mit federeinheit

Country Status (5)

Country Link
EP (1) EP2176036B1 (zh)
CN (1) CN101772401B (zh)
DE (1) DE102007035699A1 (zh)
RU (1) RU2482957C2 (zh)
WO (1) WO2009015924A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012206445A1 (de) * 2012-04-19 2013-10-24 Hilti Aktiengesellschaft Werkzeugmaschine
DE102013221108A1 (de) * 2013-10-17 2015-05-07 Robert Bosch Gmbh Werkzeugmaschinenvorrichtung
JP6278830B2 (ja) * 2014-05-16 2018-02-14 株式会社マキタ 打撃工具
JP6441588B2 (ja) * 2014-05-16 2018-12-19 株式会社マキタ 打撃工具
DE102017209829A1 (de) * 2017-06-12 2018-12-13 Robert Bosch Gmbh Handwerkzeugmaschine
ES2784380T3 (es) * 2017-08-24 2020-09-24 Scheppach Fabrikation Holzbearbeitungsmaschinen Gmbh Martillo eléctrico
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
WO2019147919A1 (en) 2018-01-26 2019-08-01 Milwaukee Electric Tool Corporation Percussion tool
GB201812437D0 (en) 2018-07-31 2018-09-12 Black & Decker Inc Hammer drill

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR446414A (fr) * 1912-06-01 1912-12-05 Albert Charles James Guenee Mécanisme portatif servant au martelage
FR622930A (fr) * 1925-10-17 1927-06-09 Marteau mécanique à transmission élastique
DE852530C (de) * 1951-01-12 1952-10-16 Siemens Ag Kurbelfederhammer
US2872914A (en) * 1957-01-22 1959-02-10 Fahrni Walter Percussion machine
DE2260365A1 (de) * 1972-12-09 1974-06-12 Bosch Gmbh Robert Luftpolsterschlagwerk
DE3304916A1 (de) * 1983-02-12 1984-08-16 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
NL8304043A (nl) * 1983-11-24 1985-06-17 Skil Nederland Nv Inrichting voor het aandrijven van een boor- en/of slaggereedschap.
JPH01175183U (zh) * 1988-05-31 1989-12-13
NL8801466A (nl) * 1988-06-07 1990-01-02 Emerson Electric Co Inrichting voor het aandrijven van een boor- en/of slaggereedschap.
DE4121279A1 (de) * 1991-06-27 1993-01-07 Bosch Gmbh Robert Bohr- und/oder schlaghammer
DE10066115B4 (de) 2000-12-20 2008-04-03 Robert Bosch Gmbh Betätigungshandgriff
JP2003245871A (ja) * 2002-02-22 2003-09-02 Hitachi Koki Co Ltd 打撃工具
DE10348514B3 (de) * 2003-10-18 2005-02-17 Hilti Ag Handwerkzeugmaschine mit einem Schlagwerk mit zweiteiligem Pleuel
GB2422569A (en) * 2005-01-26 2006-08-02 Black & Decker Inc Rotary hammer
GB2423045A (en) * 2005-02-10 2006-08-16 Black & Decker Inc Hammer with adjustable amplitude of oscillation

Also Published As

Publication number Publication date
WO2009015924A1 (de) 2009-02-05
EP2176036A1 (de) 2010-04-21
DE102007035699A1 (de) 2009-02-05
CN101772401A (zh) 2010-07-07
RU2010107375A (ru) 2011-09-10
RU2482957C2 (ru) 2013-05-27
CN101772401B (zh) 2012-05-30

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