EP1849561A2 - Hand tool device with adjustable handles - Google Patents

Hand tool device with adjustable handles Download PDF

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Publication number
EP1849561A2
EP1849561A2 EP07106500A EP07106500A EP1849561A2 EP 1849561 A2 EP1849561 A2 EP 1849561A2 EP 07106500 A EP07106500 A EP 07106500A EP 07106500 A EP07106500 A EP 07106500A EP 1849561 A2 EP1849561 A2 EP 1849561A2
Authority
EP
European Patent Office
Prior art keywords
handles
hand tool
characterized
tool according
outer housing
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
EP07106500A
Other languages
German (de)
French (fr)
Other versions
EP1849561B1 (en
EP1849561A3 (en
Inventor
Stefan Schmid
Stefan Hammerstingl
Elisabeth Lind
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.)
Hilti AG
Original Assignee
Hilti AG
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
Priority to DE200610000207 priority Critical patent/DE102006000207A1/en
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP1849561A2 publication Critical patent/EP1849561A2/en
Publication of EP1849561A3 publication Critical patent/EP1849561A3/en
Application granted granted Critical
Publication of EP1849561B1 publication Critical patent/EP1849561B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D17/00Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04Handles; Handle mountings
    • B25D17/043Handles resiliently mounted relative to the hammer housing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION 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
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02Construction of casings, bodies or handles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/005Adjustable tool components; Adjustable parameters

Abstract

A hand tool (2), in particular in the form of a drill or chisel, has a drive arrangement (10) for striking a tool holder (20) along a working direction (R), an outer housing (8), in which the drive arrangement (10) at least partially received and two handles (30) which are provided on opposite sides (26, 28) of the outer housing (8) and which are adjustable for adjusting a handle height (H) relative to the tool holder (20) in different positions. It is envisaged that the handles (30) relative to the tool holder (20) are mounted displaceably between a plurality of positions and can be fixed in this position.

Description

  • The invention relates to an example, as a stand-up tool, that is primarily for a vertically downwardly directed operation in upright standing of the operator trained beating hand tool, especially in the form of an electro-pneumatic drill chisel hammer. This has for loading a tool holder with impact energy along a working direction to a drive assembly having a drive, in particular in the form of an electric motor, optionally a gear and a motion converter in the form of a percussion mechanism. Here, the drive assembly is at least partially housed in an outer housing. Furthermore, two handles are provided on opposite sides of the outer housing, which are for adjusting a handle height, relative to the tool holder in different positions can be fixed, the handle height is defined by the parallel to the working direction distance of the handles to a tip of a held in the tool holder tool.
  • Such adjustable handles allow an adaptation of the hand tool or its handle height to the respective body size of a serving person, to the respective local conditions or to different applications.
  • From the EP 0 837 757 B1 is known a striking machine having a hammer mechanism in a machine housing, wherein the machine housing is partially surrounded by a protective housing. In this case, a holding rod is provided, which is held on the machine housing via two flanges, which protrude through the protective housing, and vibration damping means. On opposite sides of the support rod also two handles are provided. In order to adapt the height, which occupy the handles in operation, to different sizes of the operator, several mounting holes are provided on both sides of the linkage, where the handles can be screwed either optionally.
  • The known percussion machine in this way allows operators with different body size each a comfortable hold during operation.
  • A disadvantage of the known impact machine, however, that the adjustment of the two handles, the respective screw with the support rod first dissolved and must be restored in the new position. It is also necessary that the appropriate tool is available to the operator. In addition, there is a risk that the two handles accidentally have a different handle height.
  • Further, by the resiliently held on the machine housing and the protective housing projecting through the support rods there is a risk that the operator pinched between the support rod and the corresponding openings of the protective housing or that penetrates through these openings dirt and affects the operation of the impact machine.
  • The present invention has for its object to avoid the disadvantages mentioned in a hand tool and to make a comfortable person, situation or aplikationsbedingte change the handle height of the handles.
  • According to the invention, the object is achieved in that the handles are mounted displaceably relative to the tool holder between a plurality of positions and can be locked in a selected position. The displaceable mounting of the handles allows a more comfortable adjustment of the handle height. In addition, the handles can thereby be held captive on the power tool.
  • Advantageously, a guide for the displaceable handles is provided on the drive assembly in this case. In this case, for example, a housing of the drive assembly or an intermediate carrier, which is held fixed or vibration-reducing to the drive assembly, serve as a direct or indirect guidance of the handles. By this arrangement, the guide on the drive assembly, a good power flow between the drive assembly and the handles is ensured during operation, which allows a good penetration of the operator on the hand tool.
  • Preferably, the guide is formed by a vibration-reducing on the drive assembly held intermediate carrier. The vibration-reducing suspension can be formed for example by spring elements. This makes it possible, in addition to the Adjustability of the handle height to ensure a low-vibration operation of the power tool.
  • Preferably, the two handles on a fixed connection, whereby they are adjusted and fixed together. In this way, it is ensured that both handles at any time have a matching handle height. In addition, the means for determining this can be reduced.
  • In a particularly preferred embodiment, the fixed connection is formed by a permanent connection of both handles with the outer housing. For example, the handles can be formed integrally with the outer housing at least in partial areas of its outer side. As a result, the outer housing can be formed almost completely closed, whereby a defective penetration of dirt and dust in the power tool can be prevented.
  • Advantageously, locking means between the fixed connection of the handles and the drive assembly are provided for locking the handles in a selected position. The arrangement of the locking means on the fixed connection thereby causes both handles are determined by the same locking means, whereby the manufacturing cost of these can be reduced.
  • Preferably, the locking means on a plurality of drive-side locking receptacles, into which a handle-side locking body in an active position for producing a positive connection at least partially protrudes. In this way, a particularly stable fixing of the handles relative to the drive arrangement can be achieved.
  • Advantageously, the locking body is formed by an eccentric element which is adjustable by means of a handle between the active position and a passive position in which the form-fitting is canceled. As a result, the lock can be solved quickly and without tools to restore them in a new position of the handles just as quickly and without tools can.
  • The invention will be explained in more detail below with reference to an embodiment. Show it:
  • FIG.
    a partially sectioned view of an inventive hand tool.
  • The single FIGURE shows a hand tool 2 in the form of an electro-pneumatically operated chisel hammer. The hand tool 2 is designed as a stand-up tool, wherein it is supported in operation via a tool 4 in the vertical direction on a substrate 6 to be processed and is usually held by a non-illustrated operator is substantially vertically aligned.
  • The hand tool 2 has an outer housing 8, in which a generally designated 10 drive assembly is partially housed. This has an electrically operated motor 12, a gear 14 and a striking mechanism 16. This impact mechanism 16 acts on a tool holder 20, which is held on a guide tube 18 and in which the tool 4 is held, in the direction of a working direction R.
  • An intermediate carrier 22 is held on the drive arrangement 10 via a vibration-reducing device 24, which is shown schematically as a spring. This intermediate carrier 22 acts as a guide relative to the outer housing 8, which is held parallel to the working direction R of the power tool 2 displaceable on the intermediate carrier 22. Alternatively, the outer housing 8 may also be guided directly through a housing portion of the drive assembly 10.
  • On a first side 26 and on a side facing away from this second side 28 of the outer housing 8 in each case a handle 30 protrudes. Both handles 30 in this case have a surface 32 which is produced in one piece with the outer housing 8, for example in a common die-casting process. In this way, both handles 30 are fixedly connected to one another via the outer housing 8 and mounted on the intermediate carrier 22 so as to be displaceable together.
  • Furthermore, a total of 34 designated locking means are provided on the first side 26 of the outer housing 8 between this and the intermediate carrier 22, by means of which the outer housing 8 on the intermediate carrier 22 and thus also with respect to the drive assembly 10 can be fixed. Because of the fixed connection of the two handles 30 with the outer housing 8, it is sufficient to provide locking means 34 only in one area, as here on the first side 26, since these two handles 30 are fixed at the same time.
  • By means of the locking means 34, the distance between the handles 30 and the tool holder 20 and thus an effective operating H handle height can be adjusted, resulting from the parallel to the direction R working distance of the handles 30 to a tip 36 of the tool 4.
  • The locking means 34 have on the intermediate carrier 22 a plurality of in the working direction R successively arranged locking receptacles 38. On the outer housing 8, an eccentric member 40 is rotatably mounted, on which an eccentric cam is formed, which acts as a locking body 42. For this purpose, the eccentric member 40 via a handle 44 between an illustrated active position in which the locking body 42 projects into one of the locking receptacles 38, and a dash-dotted illustrated passive position in which the eccentric member 40 is not engaged with any of the locking receptacles 38, adjustable.
  • In the figure, the handles 30 are fixed by means of the locking means 34 in a position in which the handle height H has a minimum value. If you want to adapt the device, for example, to a body size of the operator, to specific local conditions or a particular type of application that requires a greater handle height H, the eccentric 40 is moved by operation of the handle 44 in the passive position. Subsequently, the outer housing 8 can be moved to a new position relative to the intermediate carrier 22, which corresponds to a desired new handle height Hn, as illustrated by arrow S and two-dotted dashed line.
  • In this new position with handle height Hn, the eccentric element 40 is then pivoted by means of the handle 44 back into the active position in which the locking means 34 again produce a parallel to the working direction R positive connection between the outer housing 8 and the intermediate carrier 22 to the new relative Position of the handles 30 against the drive assembly 10 and the tool holder 20 to secure.

Claims (8)

  1. Hand tool (2), in particular in the form of a drill or chisel hammer,
    with a drive arrangement (10) for striking a tool receptacle (20) along a working direction (R),
    an outer housing (8) in which the drive arrangement (10) is at least partially accommodated,
    and two handles (30) which are provided on opposite sides (26, 28) of the outer housing (8) and which are adjustable for adjusting a handle height (H) relative to the tool holder (20) in different positions,
    characterized in that the handles (30) relative to the tool holder (20) are displaceably mounted between a plurality of positions and can be fixed in these positions.
  2. Hand tool according to Claim 1, characterized in that a guide for the displaceable handles (30) is provided on the drive arrangement (10).
  3. Hand tool according to claim 2, characterized in that the guide by a on the drive assembly (10) vibration-reducing held intermediate carrier (22) is formed.
  4. Hand tool according to one of claims 1 to 3, characterized in that the two handles (30) have a fixed connection.
  5. Hand tool according to claim 4, characterized in that the fixed connection by a permanent connection of both handles (30) with the outer housing (8) is formed.
  6. Hand tool according to claim 4 or 5, characterized in that between the fixed connection of the handles (30) and the drive assembly (10) locking means (34) are provided.
  7. Hand tool according to claim 6, characterized in that the locking means (34) has a plurality of drive-side locking receptacles (38) into which a handle-side locking body (42) in an active position for producing a positive connection at least partially protrudes.
  8. Hand tool according to claim 7, characterized in that the locking body (42) by an eccentric element (40) is formed, which is adjustable by means of a handle (44) between the active position and a passive position in which the positive connection is canceled.
EP07106500A 2006-04-28 2007-04-19 Hand tool device with adjustable handles Active EP1849561B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200610000207 DE102006000207A1 (en) 2006-04-28 2006-04-28 Hand tool with adjustable handles

Publications (3)

Publication Number Publication Date
EP1849561A2 true EP1849561A2 (en) 2007-10-31
EP1849561A3 EP1849561A3 (en) 2010-07-28
EP1849561B1 EP1849561B1 (en) 2011-12-21

Family

ID=38234307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07106500A Active EP1849561B1 (en) 2006-04-28 2007-04-19 Hand tool device with adjustable handles

Country Status (3)

Country Link
US (1) US20080099219A1 (en)
EP (1) EP1849561B1 (en)
DE (1) DE102006000207A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE529839C2 (en) * 2005-05-26 2007-12-04 Atlas Copco Constr Tools Ab Breaker tool with anti-vibration handle assembly
DE102008050323A1 (en) * 2008-10-04 2010-04-08 Protool Gmbh Hand machine tool with a handle arrangement
MX2014015770A (en) * 2012-07-31 2015-08-10 Boada Germans Sa Portable mixer with height-adjustable handle.
GB201518088D0 (en) * 2015-10-13 2015-11-25 Black & Decker Inc Pavement Breaker

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115241A1 (en) * 1983-02-03 1984-08-08 MACO-MEUDON Société dite : Percussive tool with swinging handles
US5044568A (en) * 1990-08-20 1991-09-03 Takachiho Kogyo Yuugen Kaisha Hand crusher with rotatably mounted handle
JPH06155331A (en) * 1992-11-30 1994-06-03 Atlas Copco Berema Ab Hammer machine
EP0837757A1 (en) * 1995-07-13 1998-04-29 Atlas Copco Berema Aktiebolag Handle means for percussive hand held machines
US5845719A (en) * 1991-09-17 1998-12-08 Kioritz Corporation Vibrating cutting machine
DE102004016009A1 (en) * 2004-04-01 2005-10-20 Bosch Gmbh Robert Hand tool, in particular drill and / or percussion hammer

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US1039971A (en) * 1911-03-10 1912-10-01 J Geo Leyner Engineering Works Company Down-hole handle-supported rock drill.
US3571874A (en) * 1969-05-28 1971-03-23 Von Arz Ag Descaling device
SE446698B (en) * 1983-09-16 1986-10-06 Atlas Copco Ab "Manage contents machine tool comprising a motor housing and housing two door handles of which at least a one s instellbart disposed"
US4718502A (en) * 1986-05-30 1988-01-12 Garcez Lorenzo T Replacement handle for a jackhammer
US5161293A (en) * 1991-04-15 1992-11-10 Ebbert Engineering, Inc. Adjustable handle for hand tool
SE504957C2 (en) * 1994-02-28 1997-06-02 Berema Atlas Copco Ab Machine skewer with handle provided backing
US6050345A (en) * 1997-02-27 2000-04-18 Keyspan Energy Ergonomic tool with lift assist mechanism
US6499172B1 (en) * 1999-09-15 2002-12-31 Wmh Tool Group, Inc. Power tool adjustable handle assembly
US6439088B1 (en) * 2000-04-25 2002-08-27 The Toro Company Reconfigurable vegetation trimmer and method of use
US6595300B2 (en) * 2001-12-20 2003-07-22 Black & Decker Inc. Side handles on drill/drivers
DE10251557A1 (en) * 2002-11-06 2004-05-19 Robert Bosch Gmbh Hand tool with a pistol-shaped handle
US20040206859A1 (en) * 2003-04-17 2004-10-21 Chong Ian M. Apparatuses, systems, and methods for positioning a powered tool
GB2402098B (en) * 2003-05-21 2007-10-17 Black & Decker Inc Vibration reduction apparatus for power tool and power tool incorporating such apparatus
US7059423B1 (en) * 2004-05-26 2006-06-13 Hoggarth Deverne Jackhammer system
DE102004036420A1 (en) * 2004-07-27 2006-03-23 Hilti Ag Power tools handle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115241A1 (en) * 1983-02-03 1984-08-08 MACO-MEUDON Société dite : Percussive tool with swinging handles
US5044568A (en) * 1990-08-20 1991-09-03 Takachiho Kogyo Yuugen Kaisha Hand crusher with rotatably mounted handle
US5845719A (en) * 1991-09-17 1998-12-08 Kioritz Corporation Vibrating cutting machine
JPH06155331A (en) * 1992-11-30 1994-06-03 Atlas Copco Berema Ab Hammer machine
EP0837757A1 (en) * 1995-07-13 1998-04-29 Atlas Copco Berema Aktiebolag Handle means for percussive hand held machines
DE102004016009A1 (en) * 2004-04-01 2005-10-20 Bosch Gmbh Robert Hand tool, in particular drill and / or percussion hammer

Also Published As

Publication number Publication date
US20080099219A1 (en) 2008-05-01
EP1849561B1 (en) 2011-12-21
DE102006000207A1 (en) 2007-10-31
EP1849561A3 (en) 2010-07-28

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