EP0135654A1 - Guidage du piston d'une perforatrice à coussin d'air - Google Patents

Guidage du piston d'une perforatrice à coussin d'air Download PDF

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Publication number
EP0135654A1
EP0135654A1 EP84103852A EP84103852A EP0135654A1 EP 0135654 A1 EP0135654 A1 EP 0135654A1 EP 84103852 A EP84103852 A EP 84103852A EP 84103852 A EP84103852 A EP 84103852A EP 0135654 A1 EP0135654 A1 EP 0135654A1
Authority
EP
European Patent Office
Prior art keywords
piston
guide
drive member
air cushion
plate
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
EP84103852A
Other languages
German (de)
English (en)
Other versions
EP0135654B1 (fr
Inventor
Wilhelm Dipl.-Ing. Geis
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.)
Techtronic Industries GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0135654A1 publication Critical patent/EP0135654A1/fr
Application granted granted Critical
Publication of EP0135654B1 publication Critical patent/EP0135654B1/fr
Expired legal-status Critical Current

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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

Definitions

  • the invention relates to a hand-held hammer drill with an impact mechanism, which contains a piston-like drive member guided in a cylindrical guide tube, which pneumatically moves an axially freely movable impactor in a back and forth movement, which transfers its energy in the form of axial impacts to a the hammer drilling machine delivers tool, and wherein the drive member is set in oscillating motion by an electric motor via a wobble body which has a radially extending plunger which has a spherically rounded head part which is mounted in the rear part of the piston-like drive member.
  • the guide cylinder is provided on its inner wall with a spline profile, and on the outside the drive piston has a spline profile which interacts with the spline profile. This spline prevents the drive piston from rotating.
  • a rotation lock of the drive piston which is realized in this way is complex.
  • the invention has for its object in an electropneumatic hammer drill in which the drive piston is reciprocated via a wobble body and the wobble body has a radially extending plunger which has a spherically rounded bearing mounted in the rear part of the working piston Head part has to secure the drive piston against twisting with a minimum of effort.
  • the radially extending plunger is provided with a spigot extending beyond the spherically rounded head part, which is guided in a plate having an elongated opening, arranged in a guide projection of the drive member.
  • a bearing sleeve made of a suitable material in the guide projection of the drive member which is made of light metal, for example, and to arrange the plate between the upper end face of the bearing sleeve and a projection in the guide projection.
  • the plate provided with the elongated opening or with a slot can also form an integral unit with the guide sleeve, which is firmly attached in the guide attachment.
  • the drive member 1 which is designed as a hollow piston and which sets the axially freely movable impact body 2 back and forth via an air cushion, contains at its rear end a guide projection 3, in which a bearing sleeve 4 (ring) is inserted.
  • the bearing sleeve 4 the spherically rounded head 5 of a plunger 6 is guided, which, extending radially, is attached to the outer ring 7 of a ball bearing 8, which is inclined at an angle to the axis 9 of the countershaft 10, one with a correspondingly oblique one Seat 11 for the ball bearing 8 provided shaft piece 12 carries and drives.
  • the plunger 6 has a pin 13 protruding beyond the rounded head part 5, which is guided in an elongated opening 14 in a plate 15.
  • the plate 15 is here between the upper end face 4 'of the sleeve or ring 4 and a projection 16 of the guide projection 3 and fixed. This measure ensures that the tangential movement of the plunger 6 or its pin 13 is restricted so that a rotational movement of the hollow piston 1 is prevented.
  • the countershaft 10 is driven in a known manner via a gearwheel which engages with the pinion of the armature shaft of the electric motor.
  • FIG. 2 The immediate, lateral limitation of the pin 13 of the plunger 6 through the opening or slot 14 in the plate 15 and the anchoring of the plate 15 between the projection 16 of the guide projection 3 including the arrangement of the bearing sleeve 4 in the guide projection can be seen in FIG. 2, while Fig. 3 illustrates the shape of the plate 15 with the slot-like opening 14.
  • the anti-rotation of the drive piston according to the invention requires only very little effort and has the particular advantage that the length of the opening 14 can be dimensioned relatively small because the drive piston 1 moves with it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP84103852A 1983-09-29 1984-04-06 Guidage du piston d'une perforatrice à coussin d'air Expired EP0135654B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3335305 1983-09-29
DE3335305A DE3335305C1 (de) 1983-09-29 1983-09-29 Handgefuehrte Hammerbohrmaschine

Publications (2)

Publication Number Publication Date
EP0135654A1 true EP0135654A1 (fr) 1985-04-03
EP0135654B1 EP0135654B1 (fr) 1987-07-01

Family

ID=6210414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103852A Expired EP0135654B1 (fr) 1983-09-29 1984-04-06 Guidage du piston d'une perforatrice à coussin d'air

Country Status (2)

Country Link
EP (1) EP0135654B1 (fr)
DE (2) DE3335305C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1949992A1 (fr) * 2007-01-25 2008-07-30 Metabowerke GmbH Marteau perforateur électrique ou perceuse électrique à percussion

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3438208A1 (de) * 1984-10-18 1986-04-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Handgefuehrte hammerbohrmaschine mit gegen verdrehen gesichertem antriebsglied
DE3523100A1 (de) * 1985-06-28 1987-01-08 Metabowerke Kg Bohrhammermaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738057A1 (de) * 1977-06-29 1979-02-15 Bosch Gmbh Robert Handwerkzeugmaschine
EP0050192A1 (fr) * 1980-10-21 1982-04-28 Robert Bosch Gmbh Perceuse à percussion

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650336A (en) * 1970-05-05 1972-03-21 Rockwell Mfg Co Power driven device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738057A1 (de) * 1977-06-29 1979-02-15 Bosch Gmbh Robert Handwerkzeugmaschine
EP0050192A1 (fr) * 1980-10-21 1982-04-28 Robert Bosch Gmbh Perceuse à percussion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1949992A1 (fr) * 2007-01-25 2008-07-30 Metabowerke GmbH Marteau perforateur électrique ou perceuse électrique à percussion

Also Published As

Publication number Publication date
EP0135654B1 (fr) 1987-07-01
DE3335305C1 (de) 1984-08-16
DE3464468D1 (en) 1987-08-06

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