EP0135654B1 - 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
EP0135654B1
EP0135654B1 EP84103852A EP84103852A EP0135654B1 EP 0135654 B1 EP0135654 B1 EP 0135654B1 EP 84103852 A EP84103852 A EP 84103852A EP 84103852 A EP84103852 A EP 84103852A EP 0135654 B1 EP0135654 B1 EP 0135654B1
Authority
EP
European Patent Office
Prior art keywords
piston
guide
air cushion
plate
percussion drill
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.)
Expired
Application number
EP84103852A
Other languages
German (de)
English (en)
Other versions
EP0135654A1 (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

  • Anti-rotation device of the air-cushion hammer mechanism piston of a hand-held hammer drill wherein the piston pneumatically sets an axially freely movable impact body in a to-and-fro movement, which delivers its energy in the form of axial impacts to a tool guided in the hammer drill, and the piston being driven by one Electric motor is set into a swinging movement via a wobble body, which has a radially extending plunger which is provided with a spherically rounded head part which is mounted in the piston of the air cushion percussion mechanism
  • 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 (air cushion hammer piston) is moved back and forth via a wobble body and the wobble body has a radially extending plunger, which has a spherically rounded, in the rear part of the drive piston mounted head part to secure the drive piston against rotation with a minimum of effort.
  • This object is achieved in that the radially extending plunger of the wobble body is guided in a plate having a slot-shaped opening, arranged in a guide projection of the air cushion hammer piston.
  • a bearing sleeve made of a suitable material in the guide shoulder of the air cushion hammer piston for example made of light metal, hereinafter referred to as the drive piston, and the plate between the upper end face of the bearing sleeve and a projection in the guide shoulder to arrange.
  • the plate provided with the slot-shaped opening or with a slot can also be attached in the lower region of the guide projection of the drive piston and can also form an integral unit with the guide sleeve, which is firmly attached in the guide projection.
  • the hollow piston 1, which sets the axially freely movable impact body 2 in a back and forth movement via an air cushion, contains at its rear end a guide projection 3, in which a bearing sleeve 4 (ring) is inserted.
  • a bearing sleeve 4 ring
  • 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, which is inclined accordingly extending 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 the ring 4 and a projection 16 of the guide projection 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 the shape of the plate 15 with the slot-like opening 14 illustrates.
  • 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.

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

Claims (4)

  1. Dispositif de guidage de piston d'une perforatrice à coussin d'air manuelle, où le piston (1) active pneumatiquement, dans un mouvement axial de va et vient, un percuteur (2) libre qui transmet l'énergie ainsi acquise sous forme de percussions axiales à un outil monté sur une perceuse à percussion, et où le piston (1), entraîné par un moteur électrique, est soumis par un culbuteur à un mouvement oscillant retransmis à un coulisseau (6) radialement disposé et qui fait état d'une tête sphérique (5) prenant elle-même appui dans le piston (1) du percuteur à coussin d'air,
    caractérisé par le fait
    que le coulisseau radial (6, 13) du culbuteur est conduit par un plateau (15) accusant une découpure longitudinale (14) et disposé sur une saillie de guidage (3) du piston (1) du percuteur à coussin d'air.
  2. 2° Dispositif de guidage selon la revendication 1°),
    caractérisé par le fait
    que le coulisseau (6) du culbuteur est muni d'un tenon (13) dépassant la tête sphérique (5) et qui vient prendre place dans le plateau (15).
  3. 3°). Dispositif de guidage selon les revendications 1°) et 2°),
    caractérisé par le fait
    que le plateau (15) est disposé entre les fronts supérieurs d'une douille de palier (4), présente sur la saillie de guidage (3) de l'élément d'entraînement, et d'un épaulement (16) de cette même saillie de guidage,
  4. 4°). Dispositif de guidage selon les revendications 1°) et 2°
    caractérisé par le fait
    que le plateau (15) accusant une une découpure longitudinale (14) fait partie de la douille de palier (4) disposée sur la saillie de guidage (3) de l'élément d'entraînement.
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 EP0135654A1 (fr) 1985-04-03
EP0135654B1 true 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)

Families Citing this family (3)

* 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
DE502007003926D1 (de) * 2007-01-25 2010-07-08 Metabowerke Gmbh Schlagwerk für einen Bohr- oder Meißelhammer; Bohr- oder Meißelhammer

Family Cites Families (3)

* 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
DE2738057A1 (de) * 1977-06-29 1979-02-15 Bosch Gmbh Robert Handwerkzeugmaschine
DE3039669A1 (de) * 1980-10-21 1982-05-27 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Also Published As

Publication number Publication date
DE3464468D1 (en) 1987-08-06
DE3335305C1 (de) 1984-08-16
EP0135654A1 (fr) 1985-04-03

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