EP2199028A2 - Outil manuel électrique, en particulier marteau perforateur et/ou burineur - Google Patents

Outil manuel électrique, en particulier marteau perforateur et/ou burineur Download PDF

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Publication number
EP2199028A2
EP2199028A2 EP09173522A EP09173522A EP2199028A2 EP 2199028 A2 EP2199028 A2 EP 2199028A2 EP 09173522 A EP09173522 A EP 09173522A EP 09173522 A EP09173522 A EP 09173522A EP 2199028 A2 EP2199028 A2 EP 2199028A2
Authority
EP
European Patent Office
Prior art keywords
housing
bearing element
hand tool
electric hand
hammer tube
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
EP09173522A
Other languages
German (de)
English (en)
Other versions
EP2199028B1 (fr
EP2199028A3 (fr
Inventor
Kurt Sieber
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 EP2199028A2 publication Critical patent/EP2199028A2/fr
Publication of EP2199028A3 publication Critical patent/EP2199028A3/fr
Application granted granted Critical
Publication of EP2199028B1 publication Critical patent/EP2199028B1/fr
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
    • 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
    • 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
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0019—Guide-sleeves
    • 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
    • B25D2250/065—Details regarding assembling of the tool
    • 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
    • B25D2250/331—Use of bearings
    • B25D2250/335—Supports therefor

Definitions

  • the invention relates to an electric hand tool, in particular drilling and / or percussion hammer, with a housing and with a hammer tube, which is rotatably mounted in the housing by means of at least one bearing element.
  • the invention further relates to a method for introducing such a hammer tube in the housing of such a power hand tool.
  • Electric hand tools of the generic type are known in particular as drills and impact hammers. They have as a driven member on a hammer tube, are introduced in the pulse generating construction elements with effect on a tool holder, and wherein the hammer tube of the rotational drive of the tool holder is used and is driven for this purpose via a transmission of the electric motor.
  • Such hammer tubes are therefore rotatably mounted in a housing of the electric hand tool.
  • the radial bearing takes place here regularly via plain bearings, such a plain bearing is pressed for example in an intermediate flange, which surrounds the hammer tube at least partially and serves to accommodate the hammer tube in the bearing in the housing, and by means of a needle bearing, which is arranged in the housing.
  • the axial bearing via stops in the housing of the electric hand tool, for example in the gear housing and in the intermediate flange.
  • This storage which is customary in the prior art, is associated with a high level of component expenditure, with a tolerance chain that tends to vibrate being present due to the multiplicity of components, in particular due to axial play.
  • the assembly is complicated, since in the motor housing and / or gear housing of the intermediate flange is introduced, in the direction of the engine then working the hammer tube inserted and joined with the bearings.
  • the object of the invention is to provide a cost-effective, space-saving and low-backlash storage of the hammer tube for generic electric hand tools and to allow a simplified installation.
  • an electric hand tool in particular a drilling and / or percussion hammer, with a housing and with a hammer tube, which is rotatably mounted in the housing by means of at least one bearing element.
  • the bearing element is held fixed by means of a rotation caused by positive engagement of the housing.
  • the fixation of the bearing element is therefore not as usual in the prior art, but by means of a positive connection, which is effected by rotation.
  • the bearing element is thus introduced into the housing in such a manner that it is loose or removable before the positive engagement occurring by rotation of the bearing element, but its installation position is fixed by means of the positive locking. It is therefore not screwed and not injected / molded, but held on the form-fitting.
  • the positive connection is formed by a bayonet closure.
  • Bayonet closures as such are known, they have shape-responsive positive locking elements, which are brought by rotation of the components to be joined together in engagement and positive engagement.
  • bayonet locks are used when the components to be connected are also to be released by a user, especially in daily use of a corresponding device or device, such as lenses of a single-lens reflex camera, so whenever a rapid release and application on the one hand and a secure fixation on the other hand is required.
  • the bearing element is a bearing ring, which is penetrated by the hammer tube.
  • the bearing element is in this case annular, namely as a bearing ring.
  • the bearing ring is from the hammer tube penetrated so that the bearing ring rests on the hammer tube or an outer circumferential surface of the hammer tube.
  • the bearing element is a sliding bearing element.
  • Plain bearings are inexpensive and durable in production and construction.
  • the bearing element preferably has on its outer side at least one fixing means for fixing to the housing.
  • the fixing means serves to secure the positive connection caused by rotation and thus the fixation in the mounting position intended for the bearing element.
  • the fixing agent is intended to prevent undesired loosening of the positive locking caused by rotation, for example due to vibrations during operation of the electric hand tool.
  • fixation all known in the art fixation into consideration, especially glands, for example, those which act radially on the bearing element, in particular in the field of positive engagement.
  • the fixing means is designed as a protruding fixing lug.
  • the fixing means is formed projecting over the outer contour of the bearing element, in particular in the form of a fixing lug.
  • a fixing lug can engage in recesses formed on the housing in the region of the bearing element or be fixed, for example, by means of a further element, for example a screw connection.
  • the fixing means is formed integrally with the bearing element, that is not attached to this, but formed from the same material.
  • a cost-effective and rapid production in one go such as in a punching / forming process, allows.
  • Another embodiment provides an anti-rotation between bearing element and housing. By preventing rotation, a relative rotation between the bearing element and the housing, thus an undesirable release of the positive connection, prevented. This ensures that the bearing element remains fixed in the housing in the intended manner. As a rotation, for example, a screw, a positive connection or any other connection comes into question, which reliably prevents twisting.
  • the housing has a transmission housing and / or an intermediate housing, wherein the bearing element is located in the transmission housing and / or in the intermediate housing.
  • the housing is subdivided with regard to the spatial allocation of different housing areas in a transmission housing, in which a transmission of the electric hand tool, for example, at least parts of a striking mechanism are arranged, an intermediate housing in which the connection to the tool holder is arranged and a motor housing in which essentially the motor of the electric hand tool is arranged, can be distinguished.
  • a transmission housing in which a transmission of the electric hand tool, for example, at least parts of a striking mechanism are arranged
  • an intermediate housing in which the connection to the tool holder is arranged
  • a motor housing in which essentially the motor of the electric hand tool is arranged
  • the housing may also consist of only one part or of two parts and, for example, not only have a transverse, but also a longitudinal division. It is essential that the bearing element is arranged in the region of the housing, in which at least substantially the transmission is located and / or in the region which serves as an intermediate housing of the connection of the transmission region to the tool holder.
  • the gear housing which is designed to be very resilient and stable due to its design as a gear housing.
  • the gear housing is only a partial housing or, in particularly preferred embodiments, a skeleton structure, wherein the sub-housing or this skeleton structure are designed so that the force introduction and force absorption takes place in a particularly effective manner and in such a way that the structure as such absorbs the forces.
  • the housing of the electric hand tool Particularly easy and inexpensive form by the gear housing or the skeleton structure in mechanically very stable, for example, made of a metal alloy structure and the housing outer contour is represented by a low-priced and lightweight plastic cover, for example as housing half-shells or partial shells.
  • a gearbox housing training with a separate, lightweight housing cover is possible.
  • the hammer tube superimposed in only one bearing element, unlike in the prior art, in which it is stored in at least two bearing elements.
  • the hammer tube can be shortened in this embodiment and the bearing element can also be formed extended so that there is a greater overlap of bearing element and hammer tube, as viewed on the relative length of the hammer tube.
  • the hammer tube can be very easily introduced in this way with the only one bearing element in the housing, in particular in the transmission housing.
  • a particularly simplified structure of the electric hand tool can be achieved, with the formation of substantially two blocks, one of which comprises the engine and the motor housing, the other the transmission in the transmission housing with the bearing element and the hammer tube.
  • the structure of the electric hand tool, in particular the assembly is thereby greatly simplified.
  • the outer diameter of the bearing element is greater than each outer diameter of such parts associated with and / or disposed on the hammer tube, and which are arranged between the bearing element and a tool holder to be assigned or assigned hammer tube end face. This ensures that the assembly, namely an insertion in the axial direction, as described above, can be done easily and easily. At the same time a clear axial positioning of the hammer tube is achieved in the housing, as a further displacement in the axial direction in the direction of a tool holder (which is not yet arranged on the hammer tube, but there will be arranged) can be done.
  • a method for introducing a hammer tube in the housing of an electric hand tool, in particular a drill and / or percussion hammer, preferably as described above, wherein the housing has a motor region and the electric hand tool is provided with a tool holder. It is provided that the hammer tube is inserted starting from the engine area in the direction of the tool holder in the housing and then fixed by turning. Unlike the prior art, therefore, the hammer tube is not mounted in the direction of the engine or a motor assembly, but in the opposite direction in the direction of the tool holder.
  • the hammer tube is actually inserted starting from the motor area, such that the motor is already mounted and inserted in the housing, but it can housing parts, in particular motor housing and gear housing, be present separately. It is essential that the hammer tube is inserted from the area provided for connection to the motor and inserted in the direction of the tool holder. In such an inserted position, the bearing element for the hammer tube is determined by rotation, resulting in the positive connection described above, in particular using the bayonet closure described above.
  • FIG. 1 shows a hammer tube 1 with applied on its outer circumferential surface 2 bearing element 3, wherein the bearing element 3 is formed as a bearing ring 4, which is penetrated by the hammer tube 1.
  • the hammer tube 1 is inserted for its inclusion and shipment in an installed state in the axial direction 5 in a transmission housing 6, wherein the transmission housing 6 has a bearing element receptacle 7 for receiving the bearing element 3.
  • the hammer tube 1 passes through the bearing element receptacle 7 in the direction of an axial direction 5 to the bearing element receiving 7 machine neck 8, to which, viewed in the axial direction 5, a tool holder 9 connects.
  • the tool holder 9 is coupled to the hammer tube 1 and thus operatively connected in terms of rotational movement and pulse / impact action (for transmission to an insert tool, not shown).
  • the gear housing 6 is preferably made of a solid material 10, for example, a solid aluminum alloy 11. It has, formed from the material 10, the bearing element receiving 7, the radial and axial forces, as they are applied by the bearing element 3 on the bearing element receptacle 7, receives and dissipates in the transmission housing 6.
  • the gear housing 6 may have the lower side, removable housing cover 12 shown here, which in the embodiment shown here, a gearbox switch 13 for a not-shown gearbox, which is incorporated in the gear housing 6 of the electric hand tool, not shown.
  • the hammer tube 1 After introduction of the hammer tube 1 (namely insertion in the axial direction 5 until it engages in the bearing element receptacle 7), the hammer tube 1 supports exclusively via the bearing element 3 and the associated bearing element receptacle 7 in the gearbox housing 6.
  • the radial support of the hammer tube 1 takes place here via the bearing element 3, which is designed as a sliding bearing 14.
  • FIG. 2 shows the hammer tube 1 immediately before reaching its installation position in the gear housing 6, wherein the tool holder 9 associated coupling piece 17 passes through the machine neck 8, and wherein the hammer tube 1 rotatably axially concentric to a rotational axis 18 of the tool holder 9 in the gear housing 6 rotatably supports.
  • the introduction of the hammer tube 1 in the bearing element receiving 7 takes place in the axial direction 5, wherein upon engagement of the bearing element 3 for locking the bayonet lock 15, a rotation 19 takes place in the circumferential direction; a rotation 19 in the opposite direction causes a loosening of the bayonet closure 15, whereby the hammer tube 1 can be easily removed again from the gear housing 6, for example, in the case of service.
  • the transmission and the impact mechanism is introduced and joined and then the unit shown of the gear housing 6 with the motor housing (not shown) and the motor introduced there to drive connected.
  • FIG. 3 shows the bearing element 3, which is designed as a self-lubricating sliding bearing 14. It consists of a suitable material for such self-lubricating bearing applications, for example, sintered bronze 20.
  • the bearing element 3 On its outer peripheral side 21, the bearing element 3 for forming the bayonet lock 15 locking webs 22 which in shape-responsive geometries of in FIGS. 1 and 2 shown bearing element receptacle 7 (see there) intervene. Due to the elongated in the circumferential direction execution of the locking webs 22 can be a relatively large-scale axial fixation of the bearing element 3 in the bearing element holder 7, not shown here cause.
  • the locking webs 22 are in this case as fixing means 23 for fixing the bearing element 3 in the in FIGS.
  • the bearing element 3 has a rotation 25, which consists in the embodiment shown in an interaction of recesses 26 in a face 27 and the outer peripheral side 21 of the bearing element 3 with engagement means, not shown.
  • the engagement means engage, in the installed state of the bearing element 3 in the bearing element receptacle 7 shown in the preceding figures, into the recesses 26 and thereby prevent a relative rotation of the bearing element 3 to the bearing element receptacle 7 shown in the preceding figures, ie an opening of the bayonet 15
  • the engagement means may in this case be formed by a screw connection, a detent or other suitable means which reliably (and in particular self-acting) engage in the recesses 26.
  • the engagement means is preferably formed by a web arranged on the housing cover 12, in particular a plastic web, which stops, for example, during the production process of the housing cover 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP09173522.5A 2008-12-19 2009-10-20 Outil manuel électrique, en particulier marteau perforateur et/ou burineur Not-in-force EP2199028B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008054978A DE102008054978A1 (de) 2008-12-19 2008-12-19 Elektrohandwerkzeug, insbesondere Bohr- und/oder Schlaghammer

Publications (3)

Publication Number Publication Date
EP2199028A2 true EP2199028A2 (fr) 2010-06-23
EP2199028A3 EP2199028A3 (fr) 2014-01-22
EP2199028B1 EP2199028B1 (fr) 2017-12-13

Family

ID=42020454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09173522.5A Not-in-force EP2199028B1 (fr) 2008-12-19 2009-10-20 Outil manuel électrique, en particulier marteau perforateur et/ou burineur

Country Status (2)

Country Link
EP (1) EP2199028B1 (fr)
DE (1) DE102008054978A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2732924A1 (fr) * 2012-11-19 2014-05-21 Makita Corporation Outil à impact
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
US10926393B2 (en) 2018-01-26 2021-02-23 Milwaukee Electric Tool Corporation Percussion tool

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE557948C (de) * 1930-05-09 1932-08-30 Nordiska Armaturfab Ab Vorrichtung an elektrischen Schlagwerkzeugen
GB626869A (en) * 1946-08-26 1949-07-22 Romeo Agustoni Portable machine tool
GB877794A (en) * 1959-01-14 1961-09-20 Joseph Morris Mechanical hammer
US3119274A (en) * 1961-06-05 1964-01-28 Black & Decker Mfg Co Power-driven tool for drilling or impact-drilling
GB1028531A (en) * 1963-02-22 1966-05-04 Black & Decker Mfg Co Rotary hammer
DE10045618A1 (de) * 2000-09-15 2002-04-04 Bosch Gmbh Robert Werkzeugmaschine mit einem Raum mit Schmiermittel und einer Druckausgleichseinrichtung des Raums
DE10260710A1 (de) * 2002-12-23 2004-07-01 Robert Bosch Gmbh Bohr- oder Schlaghammer
DE10261025A1 (de) * 2002-12-24 2004-07-08 Robert Bosch Gmbh Elektrowerkzeugmaschine mit mehreren, in getrennten Gehäusen untergebrachten Funktionsbaugruppen
DE102006026157A1 (de) * 2006-06-06 2007-12-13 Robert Bosch Gmbh Elektrohandwerkzeugmaschine mit einem Hammerrohr
DE102006060319A1 (de) * 2006-12-20 2008-06-26 Robert Bosch Gmbh Werkzeugmaschine mit einem mit einer Verdrehsicherung versehenden Gleitlager

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2732924A1 (fr) * 2012-11-19 2014-05-21 Makita Corporation Outil à impact
CN103817656A (zh) * 2012-11-19 2014-05-28 株式会社牧田 冲击工具
CN103817656B (zh) * 2012-11-19 2016-04-27 株式会社牧田 冲击工具
US9573262B2 (en) 2012-11-19 2017-02-21 Makita Corporation Impact tool
US11633843B2 (en) 2017-10-20 2023-04-25 Milwaukee Electric Tool Corporation Percussion tool
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
US10926393B2 (en) 2018-01-26 2021-02-23 Milwaukee Electric Tool Corporation Percussion tool
US11059155B2 (en) 2018-01-26 2021-07-13 Milwaukee Electric Tool Corporation Percussion tool
US11141850B2 (en) 2018-01-26 2021-10-12 Milwaukee Electric Tool Corporation Percussion tool
US11203105B2 (en) 2018-01-26 2021-12-21 Milwaukee Electric Tool Corporation Percussion tool
US11759935B2 (en) 2018-01-26 2023-09-19 Milwaukee Electric Tool Corporation Percussion tool
US11865687B2 (en) 2018-01-26 2024-01-09 Milwaukee Electric Tool Corporation Percussion tool
US12472613B2 (en) 2018-01-26 2025-11-18 Milwaukee Electric Tool Corporation Percussion tool

Also Published As

Publication number Publication date
EP2199028B1 (fr) 2017-12-13
EP2199028A3 (fr) 2014-01-22
DE102008054978A1 (de) 2010-06-24

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