EP3281749A1 - Poignee de machine-outil de burinage - Google Patents

Poignee de machine-outil de burinage Download PDF

Info

Publication number
EP3281749A1
EP3281749A1 EP16183519.4A EP16183519A EP3281749A1 EP 3281749 A1 EP3281749 A1 EP 3281749A1 EP 16183519 A EP16183519 A EP 16183519A EP 3281749 A1 EP3281749 A1 EP 3281749A1
Authority
EP
European Patent Office
Prior art keywords
auxiliary handle
base body
chisel
end ring
handle according
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.)
Withdrawn
Application number
EP16183519.4A
Other languages
German (de)
English (en)
Inventor
Jerome Jaromin
Olaf Koch
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
Application filed by Hilti AG filed Critical Hilti AG
Priority to EP16183519.4A priority Critical patent/EP3281749A1/fr
Priority to PCT/EP2017/069319 priority patent/WO2018029026A1/fr
Publication of EP3281749A1 publication Critical patent/EP3281749A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B25D17/04—Handles; Handle mountings
    • B25D17/046—Sleeve-like handles surrounding the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • 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
    • B25D2250/345—Use of o-rings
    • 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
    • B25D2250/365—Use of seals

Definitions

  • the present invention relates to an auxiliary handle for a chiseling machine tool.
  • the auxiliary handle according to the invention for a chiseling hand tool has a sleeve-shaped base body, a gripping surface for gripping with one hand, and at least one annular or hollow cylindrical sealing element on an inner surface of the base body.
  • the main body encloses with its inner surface a continuous receiving space for performing a chisel.
  • the gripping surface for grasping around with one hand surrounds the base body and is arranged coaxially with the base body.
  • the auxiliary handle can be placed directly on the chisel. The inner surfaces abut the chisel, the sealing element clamps the auxiliary handle sufficiently firmly.
  • the sealing element is preferably formed from an elastomer.
  • the inner surface may be coated with an elastomer which forms the sealing element.
  • at least half of the inner surface is coated with the elastomer.
  • the receiving space has a shaft of a commercial chisel complementary hollow profile.
  • the receiving space is, for example, cylindrical with an inner diameter of 18 mm.
  • the gripping surface has a diameter of 45 mm to 65 mm.
  • the grip surface may have a length of 80 mm to 120 mm.
  • the dimensions of the gripping surface are preferably ergonomically adapted to a hand.
  • the gripping surface is cylindrical, for example, or continuously convexly curved along the longitudinal axis.
  • One embodiment provides an axially offset to the main body arranged end ring and a bellows, which connects the end ring with the body. The conclusion can reduce the dust entry into the power tool.
  • An embodiment provides that an inner diameter of the end ring is larger than the hollow profile of the receiving space.
  • a hand tool machine has a tool holder for holding a chisel, a striking mechanism for applying impacts to the chisel held in the tool holder, and the auxiliary handle.
  • the auxiliary handle may have an axially offset to the main body arranged end ring and a bellows, which connects the end ring with the body. The end ring is connected to the tool holder.
  • the auxiliary handle is arranged in the direction of impact after the tool holder.
  • Fig. 1 schematically shows a chisel hammer 1 as an example of a chiseling hand tool .
  • the chisel hammer 1 has a tool holder 2, in which a shaft 3 of a tool, for example one of the chisel 4, can be used.
  • a primary drive of the chisel hammer 1 is a motor 5, which drives a striking mechanism 6 .
  • a battery pack or a power line 7 supplies the motor 5 with power.
  • a user can lead the chisel hammer 1 by means of a handle 8 and take the chisel hammer 1 into operation by means of a system switch 9 .
  • Rotary hammer can be provided with an additional rotary drive which rotatably drives the tool holder 2 about the working axis 11 .
  • the percussion 6 is a pneumatic percussion 6.
  • An exciter piston 12 and a racket 13 are guided in a guide tube 14 in the striking mechanism 6 along the working axis 11 movable.
  • the excitation piston 12 is coupled via an eccentric 15 to the motor 5 and forced to a periodic, linear movement.
  • a connecting rod connects the eccentric 15 with the excitation piston 12.
  • An air spring formed by a pneumatic chamber 16 between the exciter piston 12 and the racket 13 couples a movement of the racket 13 to the movement of the exciter piston 12 .
  • the racket 13 can open directly to a rear end of the bit 4 or transferred indirectly through a substantially stationary anvil 17 a portion of its momentum to the bit. 4
  • the striking mechanism 6 and preferably the further drive components are arranged within a machine housing 18 .
  • Fig. 2 shows an auxiliary handle 19 for the chisel hammer 1.
  • the auxiliary handle 19 is pushed onto the bit 4 and carried by the bit. 4
  • the auxiliary handle 19 clamps on the chisel 4 and moves accordingly with the chisel 4 during chiselling.
  • the auxiliary handle 19 has a sleeve-shaped base body 20.
  • the base body 20 imparts the auxiliary handle 19 its mechanical stability.
  • the main body 20 may be formed of a hard plastic, which are also used for the machine housing 18 or a main body of the handle 8 .
  • An inner surface 21 of the main body 20 surrounds a continuous receiving space 22.
  • the receiving space 22 is open at both longitudinal ends 23 of the auxiliary handle 19 .
  • the receiving space 22 substantially corresponds to the shape of a shaft of commercial chisel 4 for hand tool machines. With regard to the shank sizes, a standard has developed, which makes it possible to use the chisel 4 with chisel hammers 1 from different manufacturers.
  • a typical shaft 3 is cylindrical with a diameter of 10 mm or 18 mm, or hexagonal-prismatic with an average diameter of 19 mm, 22 mm, 28 mm.
  • the hollow profile 24 of the receiving space 22 corresponds to the radial dimensions of one of the standardized shaft sizes.
  • Hollow section 24 denotes the cross section of the largest cylindrical or prismatic body, which can be pushed through the receiving space 22 .
  • the receiving space 22 may have over its entire length 25 a constant, the hollow profile 24 corresponding hollow cross-section, for example, circular or hexagonal cross-section.
  • the receiving space 22 sections have a relation to the hollow section 24 extended cross-section. Sections in which the cross section of the hollow profile 24 are preferably distributed over at least half of the receiving space 22 , so that the base body 20 experiences a sufficiently stable support on the chisel 4 .
  • the receiving space 22 is provided with a sealing element 26 .
  • the sealing element 26 may be formed, for example, as a coating of the inner surface 21 with an elastomer.
  • the sealing element 26 reduces the hollow profile 24 slightly to clamp the bit 4 .
  • the base body 20 has a gripping surface 27.
  • the gripping surface 27 is coaxial with the receiving space 22 and thus the chisel 4.
  • the gripping surface 27 is, for example, cylindrical.
  • the gripping surface 27 may have a surface which is structured from an ergonomic point of view, for example, it may be undulating along the longitudinal axis.
  • the gripping surface 27 has a sufficient length for a hand in the range between 8 cm and 12 cm.
  • the length of the gripping surface 27 largely corresponds to the length 25 of the base body 20.
  • a diameter of the gripping surface 27 is in the range of 45 mm to 65 mm.
  • the gripping surface 27 may be rubberized.
  • the auxiliary handle 19 may have a closing ring 28 for attachment to the tool holder 2 .
  • the end ring 28 does not abut the chisel 4 , an inner diameter 29 is correspondingly larger than the hollow profile 24 of the main body 20.
  • the end ring 28 is attached to a longitudinal end of the main body 20 by means of a bellows 30 .
  • the end ring 28 is for example elastically expandable and can be pushed over the tool holder 2 .
  • the bellows 30 seals the space between the auxiliary handle 19 and the tool holder 2 and at the same time allows relative movement of the auxiliary handle 19 relative to the tool holder 2.
  • Fig. 4 shows an auxiliary handle 31 with an analogous structure to the auxiliary handle 19 in Fig. 2 ,
  • a continuous sealing element 26 has two sealing rings are arranged on the inner surface 21 of the 32nd
  • the sealing rings 32 are preferably spaced over more than half the length 25 of the receiving space 22 .
  • the number of sealing rings 32 is exemplary, and one or more sealing rings 32 may be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP16183519.4A 2016-08-10 2016-08-10 Poignee de machine-outil de burinage Withdrawn EP3281749A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16183519.4A EP3281749A1 (fr) 2016-08-10 2016-08-10 Poignee de machine-outil de burinage
PCT/EP2017/069319 WO2018029026A1 (fr) 2016-08-10 2017-07-31 Poignée auxiliaire pour machine-outil de burinage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16183519.4A EP3281749A1 (fr) 2016-08-10 2016-08-10 Poignee de machine-outil de burinage

Publications (1)

Publication Number Publication Date
EP3281749A1 true EP3281749A1 (fr) 2018-02-14

Family

ID=56683772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16183519.4A Withdrawn EP3281749A1 (fr) 2016-08-10 2016-08-10 Poignee de machine-outil de burinage

Country Status (2)

Country Link
EP (1) EP3281749A1 (fr)
WO (1) WO2018029026A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1362657A (en) * 1919-10-04 1920-12-21 Whyte William Sidney Tool-holder
DE1250380B (fr) * 1956-08-10 1967-09-14
US3916478A (en) * 1974-05-15 1975-11-04 Caterpillar Tractor Co Vibration isolating grip for pneumatic hand tools
US4044625A (en) * 1976-07-01 1977-08-30 Chicago Pneumatic Tool Company Vibration isolating hand grip for shank of a percussive chisel
DE9307623U1 (de) * 1993-05-19 1993-09-30 Koenig J Gmbh & Co Werkzeugfab Schrifthammer sowie Schutzhülse für diesen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1362657A (en) * 1919-10-04 1920-12-21 Whyte William Sidney Tool-holder
DE1250380B (fr) * 1956-08-10 1967-09-14
US3916478A (en) * 1974-05-15 1975-11-04 Caterpillar Tractor Co Vibration isolating grip for pneumatic hand tools
US4044625A (en) * 1976-07-01 1977-08-30 Chicago Pneumatic Tool Company Vibration isolating hand grip for shank of a percussive chisel
DE9307623U1 (de) * 1993-05-19 1993-09-30 Koenig J Gmbh & Co Werkzeugfab Schrifthammer sowie Schutzhülse für diesen

Also Published As

Publication number Publication date
WO2018029026A1 (fr) 2018-02-15

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