EP2379281A1 - Machine-outil portative - Google Patents

Machine-outil portative

Info

Publication number
EP2379281A1
EP2379281A1 EP09737405A EP09737405A EP2379281A1 EP 2379281 A1 EP2379281 A1 EP 2379281A1 EP 09737405 A EP09737405 A EP 09737405A EP 09737405 A EP09737405 A EP 09737405A EP 2379281 A1 EP2379281 A1 EP 2379281A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
toothed sleeve
tool according
bearing
switching element
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
EP09737405A
Other languages
German (de)
English (en)
Other versions
EP2379281B1 (fr
Inventor
Kurt Sieber
Otto Baumann
Elisabeth Michl
Hardy Schmid
Holger Ruebsaamen
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 EP2379281A1 publication Critical patent/EP2379281A1/fr
Application granted granted Critical
Publication of EP2379281B1 publication Critical patent/EP2379281B1/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
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • 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
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/006—Parallel drill and motor spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • the invention relates to a hand tool, in particular a hammer drill, with a work spindle, a hand tool housing and an intermediate shaft arranged parallel to the work spindle, which is axially displaceably mounted to a mode change, and with a toothed sleeve, which is intended to a torque on the To transmit intermediate shaft.
  • toothed sleeve is fixed in the axial direction by means of the handheld power tool housing.
  • a "work spindle” should in particular also be understood to mean a hammer tube in which an element which is intended to generate pulses is guided
  • the work spindle is rotatable and can be axially fixed and / or at least partially axially movable and / or multi-piece be executed.
  • a "change of operating mode” is to be understood as meaning, in particular, switching over between two operating modes, in particular between a percussion drilling operation, a drilling operation and / or a chisel operation. In a chisel operation introduces
  • main working direction is to be understood in particular as meaning a direction in which the handheld power tool is normally moved during a working operation, for example directly during a drilling operation.
  • Provided is to be understood to mean in particular specially equipped and / or designed.
  • a “toothed sleeve” should in particular be understood to mean an element which at least partially surrounds a cavity and / or at least one toothed element, which preferably consists of teeth and tooth spaces and is designed as a spur gear, has to transmit a torque Transmit torque "should be understood in particular a transmission of power by means of a rotary motion.
  • By "fixed in the axial direction * ' is meant to be immovable, in particular along an axis.
  • the toothed sleeve remains immobile in a mode change in the axial direction with respect to a hand tool housing and / or with respect to a motor shaft.
  • a "hand tool machine” is to be understood as meaning, in addition to a rotary hammer, in particular also a percussion drilling machine and / or another hand tool machine that appears appropriate to a person skilled in the art.
  • the power tool on a motor shaft, which is arranged parallel to the work spindle.
  • the toothed sleeve is fixed relative to the motor shaft in the axial direction.
  • the term "arranged in parallel” is understood in particular to mean that rotational axes of the work spindle, the motor shaft and the intermediate shaft are aligned parallel to each other.
  • the power tool may have a motor shaft which is arranged perpendicular to the work spindle. By arranged parallel to the work spindle motor shaft advantageous low height can be achieved.
  • a switching element which is axially displaceable for at least one operating mode change relative to the toothed sleeve, whereby advantageously at least two modes, such as a drilling operation and a percussion drilling, a reliable and rotationally fixed connection between see the intermediate shaft and the switching element is possible ,
  • the hand tool on a coupling element which rotatably connects at least the switching element and the tooth sleeve together.
  • a “coupling element” is to be understood in particular to mean a device which non-rotatably connects two elements, independent of an axial displacement of the elements towards one another or away from one another By the coupling element, the switching element and the toothed sleeve with a rotationally fixed connection in all positions of the switching element and the
  • the toothed sleeve at least partially surrounds the switching element.
  • at least partially enclose is to be understood in particular that the switching element is at least partially disposed in the cavity which encloses the toothed sleeve, whereby a required space can be advantageously reduced.
  • a spring element which is intended to displace at least the switching element at least during a mode change, whereby a simple construction is possible.
  • the spring element shifts the switching element in a change from the drilling operation in the Schlagbohr memori.
  • a spring element designed as a helical spring it is also possible to use another device that appears meaningful to a person skilled in the art, such as, for example, a rubber element, a hydraulic, magnetic or pneumatic device, used to move the switching element.
  • a spring element which surrounds the toothed sleeve at least partially, whereby very little space is required for a gear assembly.
  • connecting element which rotatably connects the intermediate shaft and the switching element in at least one mode of operation.
  • a “connection element” is to be understood in particular to mean a device which, in at least one mode of operation, has a rotational relative movement of two
  • the connecting element in a drilling operation and in a percussion drilling operation prevents a relative rotational movement of the two elements relative to one another.
  • the connecting element allows a freewheel, that is to say a rotational relative movement, in which the two elements are rotatable relative to one another.
  • the connecting element is opened in a chiseling operation.
  • the connecting element which rotatably connects the intermediate shaft and the switching element in at least one operating mode, is opened in a chiseling operation.
  • "open” is to be understood as meaning, in particular, that the two elements connecting the connecting element are rotationally fixed to one another in a drilling operation and a percussion drilling operation and now have a freewheeling relationship with one another expand the hand tool.
  • a second connecting element which transmits at least one torque from the switching element to a Huber Weger in at least one mode, whereby an advantageous impact movement of the tool can be achieved.
  • the Huberzeuger be realized for example by means of a wobble drive and / or an eccentric drive.
  • the second connecting element is opened in a drilling operation, whereby advantageously an application range of the portable power tool can be expanded.
  • an additional bearing element is proposed, by means of which at least the toothed sleeve is mounted.
  • An "additional Lagerelemenf is to be understood in particular a bearing element that can be produced separately from in an installed state adjacent elements, in particular a housing element and / or the toothed sleeve.
  • the additional bearing element is designed as a stud.
  • the term "supported by the bearing element” is to be understood in particular as meaning that the bearing element dissipates and / or supports linear forces occurring during storage, whereby a bearing permits differently oriented movements, in this case a different axial rotational movement of the toothed sleeve
  • Various bearings which appear appropriate to the person skilled in the art, such as slide bearings, roller bearings, sheet metal cups, needle bearings and / or deep groove ball bearings, can be used, and the toothed sleeve can be structurally easily mounted by means of the additional bearing element.
  • the additional bearing element is at least rotatably connected to a housing element, whereby the hand tool can be easily mounted.
  • an integrally formed with a housing element bearing pin is proposed, by means of which at least the toothed sleeve is mounted.
  • integral is to be understood in particular as meaning that the bearing journal and the housing element are produced from a common blank, whereby components can advantageously be saved.
  • a bearing which supports at least the toothed sleeve in a Huberzeuger.
  • stored in a Huberzeuger should be understood in particular that occurring during storage forces on at least one component of the Huberzeugers, preferably a transmission element of the Huberzeugers, derived and / or supported.
  • the bearing element is to support the toothed sleeve in the elevator, to which the second connecting element transmits a torque. The storage of the toothed sleeve in the Huber Weger can be saved particularly advantageous space.
  • At least one bearing arranged inside the toothed sleeve which axially and / or radially supports the toothed sleeve is proposed.
  • the term "within the toothed sleeve” should be understood in particular to mean that the toothed sleeve at least partially surrounds the bearing.
  • the toothed sleeve has a bearing journal.
  • the bearing journal is rotatably connected to the toothed sleeve.
  • Fig. 1 is a schematic representation of a trained as a hammer drill
  • Fig. 2 is a schematic interior view of the power tool from
  • 3 is a schematic interior view of the hand tool in a second embodiment
  • Fig. 4 is a schematic interior view of the power tool in a third embodiment
  • Fig. 5 is a schematic detail view of a gear arrangement of
  • FIG. 6 is a schematic detail view of the gear arrangement in a fourth embodiment
  • FIG. 9 shows a schematic detail view of the gear arrangement in a seventh exemplary embodiment
  • FIG. 10 shows a schematic detail view of the gear arrangement in an eighth exemplary embodiment.
  • FIG. 1 shows a schematic representation of a first exemplary embodiment of a hand-held power tool 10a designed as a hammer drill with a pistol-shaped handheld power tool housing 86a.
  • the hand tool 10a has a main handle 46a angled with respect to a main working direction 44a, which is made integral with the hand tool housing 86a.
  • a front region 48a of the hand tool 10a there are an auxiliary handle 50a, a tool chuck 52a, a tool 54a designed as an SDS-plus drill bit, and a control element 56a.
  • the operating element 56a By means of the operating element 56a, a non-illustrated operator can make a change of operating mode.
  • FIG. 2 shows, in an interior view, a gear arrangement 57a of the handheld power tool 10a in a schematic representation, which is intended to change the operating mode of the handheld power tool 10a.
  • the hand-held power tool 10a has a motor shaft 14a, which is not shown in greater detail. motor is driven, and a work spindle 12a on. An axis of rotation 58a of the motor shaft 14a extends parallel to the main operating direction 44a and parallel to a rotation axis 60a of the work spindle 12a.
  • an impulse generating device In the working spindle 12a and in the main working direction 44a in front of and behind the work spindle 12a is an impulse generating device with a hoist generator only partially shown
  • the handheld power tool 10a has an intermediate shaft 16a arranged parallel to the work spindle 12a.
  • the intermediate shaft 16a is axially displaceably mounted for a mode change by means of the operating element 56a and has an external toothing 62a which transmits a torque in at least one operating mode to the work spindle 12a designed as a hammer tube.
  • the hand tool 10a has a toothed sleeve 18a, which transmits a torque from the motor shaft 14a to a switching element 22a during operation.
  • the toothed sleeve 18a is fixed in an axial direction 20a by means of the portable power tool housing 86a with respect to the motor shaft 14a.
  • the hand tool 10a, the switching element 22a which is axially displaceable for a mode change over the toothed sleeve 18a.
  • a transmission of the torque from the toothed sleeve 18a to the switching element 22a takes place by means of a coupling element 24a designed as a splined shaft profile, which connects the switching element 22a and the toothed sleeve 18a in a rotationally fixed manner to one another.
  • the hand tool 10a has the hoist generator 32a, with a transmission element 64a and with an eccentric 66a, and a spring element 26a.
  • the motor shaft 14a faces at a main working direction 44a
  • the toothed sleeve 18a is formed as a hollow shaft, which has three outer radii decreasing along the main working directions 44a and two inner radii decreasing in a radial direction along the main working directions 44a. In the region of the largest outer radius, which is formed by a pressed-on the toothed sleeve 18 a ring, the toothing 70 a is arranged. A transition 72a between the middle and the small outer radius to a support serves in the axial direction as a support surface for the spring element 26a.
  • a transition 74a between the large and the small inner radius serves as a bearing surface for a bearing 76a.
  • the bearing 76a supports the Tooth sleeve 18a in a housing member 36a, which is indirectly connected via the bearing member 34a with the power tool housing 86a.
  • the toothed sleeve 18a encloses the switching element 22a in a region 78a lying in the main working direction 44a, which extends in a tubular manner parallel to the main working direction 44a.
  • the spring element 26a shifts the switching element 22a in the mode change between drilling operation and Schlagbohr réelle and is designed as a helical spring.
  • the spring element 26a is supported on the toothed sleeve 18a and the switching element 22a and presses the two elements 18a, 22a in an axial
  • the spring element 26a presses the switching element 22a during the chisel operation and the Schlagbohr suitss against the transmission element 64a of the Huber Wegers 32a, thus enabling a rotationally fixed connection between the switching element 22a and the transmission element 64a.
  • the spring element 26a partially encloses the toothed sleeve 18a and the switching element 22a in a region extending in a tubular manner parallel to the main working direction 44a.
  • the hand tool 10a has a first connecting element 28a, which rotatably connects the intermediate shaft 16a and the switching element 22a in a drilling operation and a percussion drilling operation.
  • the first connection element 28a is designed as a spline. In a chisel operation, the intermediate shaft 16a is displaced axially by means of the operating element 56a in the main working direction 44a. Thereby, the first connecting member 28a opens by moving the intermediate shaft 16a away from the switching member 22a, and it becomes no
  • the hand tool 10a has a second connecting element 30a, which the switching element 22a and the transmission element 64a of the Huber Wegers
  • the second connection member 30 a is formed as a spline toothing, which is arranged on the switching element 22 a in the main working direction 44 a at an outer radius.
  • the intermediate shaft 16a is displaced axially by means of the operating element 56a counter to the main working direction 44a.
  • the Intermediate shaft 16a thereby also displaces the switching element 22a counter to the main working direction 44a against a spring pressure of the spring element 26a.
  • the second connection element 30a opens. No torque is transmitted to the transmission element 64a and thus to the elevator 32a.
  • FIGS. 3, 4 and 6 to 10 show further exemplary embodiments of the invention.
  • the letter a in the reference numerals of the embodiment in Figures 1, 2 and 5 is replaced by the letters b to h in the reference numerals of the embodiments in Figures 3, 4 and 6 to 10.
  • the following descriptions are essentially limited to the differences between the exemplary embodiments, reference being made to the description of the other exemplary embodiments, in particular FIGS. 1, 2 and 5, with regard to components, features and functions remaining the same.
  • FIG. 3 shows a handheld power tool 10b, in which, in contrast to the first exemplary embodiment in FIG. 2, a spring element 26b and a toothed sleeve 18b are arranged partially within a switching element 22b.
  • the switching element 22b partially encloses the toothed sleeve 18b.
  • the spring element 26b is disposed within the toothed sleeve 18b and the switching element 22b.
  • bearing surfaces for the spring element 26b serve within the toothed sleeve 18b and within the switching element 22b arranged webs 80b.
  • FIG. 4 shows a handheld power tool 10c, in which, in contrast to the first exemplary embodiment in FIG. 2, a first connecting element
  • the first connection element 82c is designed as a splined shaft profile and is arranged within the toothed sleeve 18c.
  • a switching element 22c is arranged coaxially with the intermediate shaft 16c.
  • the switching element 22c partially encloses the toothed sleeve 18c in a region extending in a tubular manner parallel to the main working direction 44a.
  • the intermediate shaft 16c engages in the spline profile of the toothed sleeve 18c.
  • the intermediate shaft 16c is displaced and moves in a spline-free region 84c of the toothed sleeve 18c. In this case, no torque is transmitted from the toothed sleeve 18c to the intermediate shaft 16c.
  • FIG. 5 shows a detailed representation of the mounting of the toothed sleeve 18a of the first exemplary embodiment from FIG. 2.
  • the gear arrangement 57a has the additional bearing element 34a, which is designed as a stud.
  • the bearing element 34a is pressed into the housing element 36a formed as an intermediate flange and connected above it to the handheld power tool housing 86a. Axially, the bearing element 34a is secured by means of a snap ring 88a.
  • the gear arrangement 57a has, for a radial mounting of the toothed sleeve 18a, a needle bearing 90a which is arranged coaxially with the toothed sleeve 18a between the bearing element 34a and the toothed sleeve 18a.
  • the toothed sleeve 18a is mounted by means of a disk 92a inserted in the toothed sleeve 18a.
  • the needle bearing 90a and the disc 92a may be made in one piece.
  • FIG. 6 shows an alternative mounting of a toothed sleeve 18d.
  • a bearing pin 38d instead of a stud bolt according to Figure 5 is provided.
  • the bearing pin 38d is designed in one piece with a housing element 36d made of light metal and thus connected to a handheld power tool housing 86d.
  • An axial and radial bearing takes place by means of a one-piece sheet metal pot 94d, which extends axially along the bearing pin 38d and radially along the housing member 36d.
  • a bearing element 34e configured as a stud is pressed into a toothed sleeve 18e.
  • a gear arrangement 57e has a needle bearing 9Oe, which is arranged between the bearing element 34e and a housing element designed as an intermediate flange
  • FIG. 8 shows an exemplary embodiment in which a bearing journal 96f is integrally formed on a toothed sleeve 18f.
  • the bearing pin 96f and the toothed se 18f made in one piece.
  • Axial and radial mounting takes place by means of a sheet metal pot 94f which extends axially along the journal 96f and radially along the housing member 36f which is connected to a portable power tool housing 86f.
  • FIG. 9 shows a further exemplary embodiment.
  • a toothed sleeve 18g on a side opposite to the main working direction 44g, has a radially extending extension 98g, which includes an angled portion 100g in the main working direction 44g.
  • the angled portion 100g has a toothing 68g, which is toothed with a motor shaft 14g.
  • the toothed sleeve 18g is mounted in a transmission element 64g of a Huber Wegers 32g, which is designed as a swash bearing, by means of a designed as a sliding bearing 40g.
  • the toothed sleeve 18g is mounted by means of a disc 92g against a housing element 36g and thus against a portable power tool housing 86g.
  • FIG. 10 shows a toothed sleeve arranged within a toothed sleeve 18h
  • 18h pressed-in bearing 42h which is designed as a deep groove ball bearing.
  • the bearing 42h is axially fixed with a retaining ring 102h on an additional bearing element 34h designed as a heel screw and thus mounted against a housing element 36h and a handheld power tool housing 86h.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

La présente invention concerne une machine-outil portative, en particulier un marteau perforateur, comportant une broche principale (12a-h), un boîtier (86a-h) et un arbre intermédiaire (16a-h) agencé parallèlement à la broche principale (12a-h) et logé de manière à pouvoir se déplacer dans le sens axial pour changer le mode de fonctionnement, et comportant une douille dentée (18a-h) qui est prévue pour transmettre un couple de rotation à l'arbre intermédiaire (16a-h). L'invention propose de fixer la douille dentée (18a-h) dans le sens axial (20a-h) au moyen du boîtier (86a-h).
EP09737405.2A 2008-12-16 2009-10-16 Machine-outil portative Active EP2379281B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008054692A DE102008054692A1 (de) 2008-12-16 2008-12-16 Handwerkzeugmaschine
PCT/EP2009/063524 WO2010072433A1 (fr) 2008-12-16 2009-10-16 Machine-outil portative

Publications (2)

Publication Number Publication Date
EP2379281A1 true EP2379281A1 (fr) 2011-10-26
EP2379281B1 EP2379281B1 (fr) 2019-09-25

Family

ID=41432763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09737405.2A Active EP2379281B1 (fr) 2008-12-16 2009-10-16 Machine-outil portative

Country Status (5)

Country Link
US (1) US9010456B2 (fr)
EP (1) EP2379281B1 (fr)
CN (1) CN102256751B (fr)
DE (1) DE102008054692A1 (fr)
WO (1) WO2010072433A1 (fr)

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DE102012209446A1 (de) * 2012-06-05 2013-12-05 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102012209925A1 (de) 2012-06-13 2013-12-19 Hilti Aktiengesellschaft Handwerkzeugmaschine
US9108312B2 (en) 2012-09-11 2015-08-18 Milwaukee Electric Tool Corporation Multi-stage transmission for a power tool
CN102837295B (zh) * 2012-10-02 2014-11-12 浙江奔宇工具有限公司 电锤传动机构
CN204686830U (zh) 2012-10-19 2015-10-07 米沃奇电动工具公司 锤钻
JP5783997B2 (ja) 2012-12-28 2015-09-24 三菱電機株式会社 電力用半導体装置
EP2821183B1 (fr) 2013-07-05 2017-06-21 Black & Decker Inc. Marteau perforateur
US11318596B2 (en) 2019-10-21 2022-05-03 Makita Corporation Power tool having hammer mechanism
JP2022119301A (ja) * 2021-02-04 2022-08-17 株式会社マキタ 打撃工具
CN221338415U (zh) * 2021-04-07 2024-07-16 米沃奇电动工具公司 冲击动力工具

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DE2242944B2 (de) * 1972-08-31 1981-04-23 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3311265A1 (de) * 1983-03-28 1984-10-11 Hilti Ag, Schaan Elektropneumatischer bohr- und meisselhammer
JPH0653327B2 (ja) * 1988-04-25 1994-07-20 松下電工株式会社 ハンマードリル
JP2632183B2 (ja) 1988-04-27 1997-07-23 株式会社山田重機 携帯式連続衝撃作業機
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DE4216808A1 (de) * 1992-05-21 1993-11-25 Hilti Ag Bohr- und Meisselgerät
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GB0008465D0 (en) * 2000-04-07 2000-05-24 Black & Decker Inc Rotary hammer mode change mechanism
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Also Published As

Publication number Publication date
DE102008054692A1 (de) 2010-06-17
EP2379281B1 (fr) 2019-09-25
WO2010072433A1 (fr) 2010-07-01
US9010456B2 (en) 2015-04-21
CN102256751A (zh) 2011-11-23
CN102256751B (zh) 2016-02-24
US20110247848A1 (en) 2011-10-13

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