EP0048482B1 - Perceuse rotative à percussion - Google Patents
Perceuse rotative à percussion Download PDFInfo
- Publication number
- EP0048482B1 EP0048482B1 EP81107493A EP81107493A EP0048482B1 EP 0048482 B1 EP0048482 B1 EP 0048482B1 EP 81107493 A EP81107493 A EP 81107493A EP 81107493 A EP81107493 A EP 81107493A EP 0048482 B1 EP0048482 B1 EP 0048482B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- beat piece
- mode change
- bit
- percussive
- recess
- 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
Links
Images
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
- B25D16/006—Mode changers; Mechanisms connected thereto
Definitions
- This invention relates to rotary percussive drills and has particular reference to hand-held rotary percussive drills fitted with a control enabling the user to decouple the percussive drive when required to enable the drill to be used in a rotary mode.
- hammer blows are imparted to a drill bit or other tool via a beat piece and it has been proposed to provide a user- operated control which acts to hold the beat piece clear of the percussive drive when it is desired to use the percussive drill in the rotary mode.
- the control when actuated by the user urges locking elements into an annular groove in the beat piece so holding the latter in a position in which it is clear of the percussive drill.
- the above mentioned DE-A 1-28 06 61 1 discloses to use as a holder for the locking elements the bit holder, and the mode change member may be rotated in order to provide a radially extending chamber in the vicinity of the opening within the drive tube, so that the locking member may be received within the chamber, thereby permitting the drill to be operated in the hammer mode.
- the present invention is different from this prior art construction in that the holder can be moved axially. This permits the locking element held by the holding member to positively move the beat piece into a position in which the drill operates in the non-hammer mode.
- the construction according to the present invention is very simple and allows to change the operation mode of the drill irrespective of whether the drill is operative or not
- the above mentioned prior art construction needs a special arrangement for preventing the percussive drive from impacting on the beat piece. Therefore, the prior art construction is rather complicated.
- a mode change into non-hammer mode with the prior art construction can only be achieved if the beat piece is in a position in which the annular groove of the beat piece is aligned with the locking element. Therefore, if the beat piece is in a position other than the above mentioned position, a mode change is not possible.
- the rotary percussive drill has a bit holder in the form of a tubular sleeve 1 one end of which has teeth 2 which engage a bevel gear 3 through which rotation about its longitudinal axis is imparted to the sleeve 1.
- the bevel gear is driven by an electric motor 4 which also provides a percussive drive through the medium of a pneumatically-actuated ram 5 reciprocable in a hollow piston 6.
- pneumatically-actuated rams to provide percussive action is well known and will not be described further.
- the beat piece Movable along the bore of the sleeve 1 is a beat piece 7.
- the beat piece is located between the ram 5 and a bit (not shown) but which is held in the sleeve 1 by releasable locking balls 8 and rotatable by the sleeve 1 via driving elements one of which is indicated at 9.
- the beat piece 7 has two diametrically opposed axial recesses 10 located between the nose 11 of the beat piece and an end portion 11 a of reduced diameter as compared with the remainder of the beat piece and is located in a smaller diameter bore 12 of the beat piece.
- the recesses 10 accommodate locking elements in the form of balls 13 that locate permanently in the recesses 10 and engage the surface of an annular holder 14 through axial slots 19 in the bit holder sleeve 1, the holder 14 maintained in contact with the cam face 15 of a mode change control member 16 of generally tubular form by a helical spring 17.
- the beat piece 7 is, in use, cyclically impacted by the nose 18 of the ram 5 as the latter is reciprocated in the hollow piston 6 and those impacts are transferred by the beat piece 7 to the bit.
- the sleeve is rotated about its longitudinal axis by the drive transmitted to gear 3 and this rotation is transferred to the bit by the driving elements 9.
- the axial length of the recess 10 is sufficient to permit the required reciprocatory movement of the beat piece.
- the mode change control member 16 is rotated so moving the balls 13 to the left as seen in the drawing and along the slots 19 and the recess 10.
- the balls 13 contact the left-hand (as seen in the drawing) end of the recess 10 and continued rotation of the member 16 moves the beat piece 7 to the left (as seen in the drawing) by an amount sufficient to provide clearance between the end 11 a and the nose 18 of the ram 5 when the latter is at the end of its impacting stroke.
- the beat piece 7 is not impacted by the nose of the piston and the bit is subject only to rotary movement.
- the member 16 is rotated in the reverse direction so allowing _the balls 13 to return, under the action of spring 17, to the position shown in the drawing and, when the user presses the bit against a workpiece, allowing the beat piece 7, to resume its active position in which it is impacted cyclically by the nose 18 of the piston 5.
- the cam face 15 of the control member 16 may be so contoured that a 90° or 180° rotation of the member 16 is needed to complete the required axial movement of the balls 13 along the slots 19.
- the contour of the cam face 15 may, alternatively, be such that further rotation of the member 16 in the same direction allows the balls 13 to be returned to their original positions.
- control member 16 may be adapted to be moved axially and not rotated to effect the change between the hammer and non-hammer modes.
- the bit is subjected to percussive action of the beat piece only when the bit is pressed by the user into contact with a workpiece. Such pressure resulting in a small inward movement of the bit into the sleeve and of the beat piece towards the ram.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Boring (AREA)
- Drilling Tools (AREA)
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81107493T ATE9881T1 (de) | 1980-09-22 | 1981-09-21 | Drehschlag-bohrwerkzeug. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8030556 | 1980-09-22 | ||
GB8030556 | 1980-09-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0048482A1 EP0048482A1 (fr) | 1982-03-31 |
EP0048482B1 true EP0048482B1 (fr) | 1984-10-17 |
Family
ID=10516212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81107493A Expired EP0048482B1 (fr) | 1980-09-22 | 1981-09-21 | Perceuse rotative à percussion |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0048482B1 (fr) |
AT (1) | ATE9881T1 (fr) |
DE (1) | DE3166719D1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4442906A (en) * | 1980-11-18 | 1984-04-17 | Black & Decker Inc. | Percussive drills |
DE3241528C2 (de) * | 1982-11-10 | 1986-04-10 | Eugen Lutz GmbH u. Co Maschinenfabrik, 7130 Mühlacker | Werkzeugspannfutter für einen Bohrhammer |
DE102004047606A1 (de) * | 2004-09-30 | 2006-04-06 | Hilti Ag | Bohr- und/oder Meisselhammer |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE6906110U (de) * | 1969-02-15 | 1969-06-12 | Metabowerke Kg | Bohrmaschine mit einem schlagbohrmechanismus |
CH591008A5 (fr) * | 1974-05-14 | 1977-08-31 | Licentia Gmbh | |
DE2605998C3 (de) * | 1976-02-14 | 1981-12-24 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Bohrhammer mit in einem Zylinder untergebrachten Antriebs- und Schlagelementen |
DE2806611C2 (de) * | 1978-02-16 | 1983-10-27 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Vorrichtung zum Umschalten eines elektropneumatischen Bohrhammers von Drehbohren auf Schlagbohren |
US4378053A (en) * | 1979-11-30 | 1983-03-29 | Black & Decker Inc. | Tool holder |
-
1981
- 1981-09-21 DE DE8181107493T patent/DE3166719D1/de not_active Expired
- 1981-09-21 EP EP81107493A patent/EP0048482B1/fr not_active Expired
- 1981-09-21 AT AT81107493T patent/ATE9881T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3166719D1 (en) | 1984-11-22 |
EP0048482A1 (fr) | 1982-03-31 |
ATE9881T1 (de) | 1984-11-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4491444A (en) | Tool holder device | |
EP0052507B1 (fr) | Perceuse à percussion | |
US4236588A (en) | Hammer drill with a lockable tool holder | |
US4763733A (en) | Hammer drill with rotational lock | |
US4878679A (en) | Variably operable hand-held device | |
US4349074A (en) | Convertible rotary impact hammer drill | |
US3507337A (en) | Function switching arrangement for electro-pneumatic hammer drills | |
US5025869A (en) | Impact drill | |
US6138772A (en) | Drill with a hammer mechanism | |
US6510903B2 (en) | Combination electrical hand-held tool | |
US3774699A (en) | Hammer drill with slidable rotation gear and lock | |
US5427188A (en) | Power tool | |
US4898250A (en) | Hand-held tool with switching means for variable operation | |
EP1808272B1 (fr) | Outil motorisé à limitation de couple | |
EP1602451B1 (fr) | Mandrin rotatif pour machine-outil électrique et machine-outil électrique incorporant un tel mandrin | |
US5466101A (en) | Device on hand power tools for driving tools | |
US20060024141A1 (en) | Power tool with an intermittent angular torque pulse | |
CA1126128A (fr) | Mecanisme de percussion | |
EP0608083B1 (fr) | Outil entraîné par moteur, en particulier un outil électrique | |
GB2102718A (en) | Improvements in or relating to rotary percussive drills | |
US4830549A (en) | Hand-held device with tool sensing means | |
US4366869A (en) | Hammer drill | |
US3006202A (en) | Rotary and percussive tool | |
US4703941A (en) | Hammer drill chuck assembly | |
US4825961A (en) | Drilling device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19820830 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19841017 Ref country code: LI Effective date: 19841017 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 19841017 Ref country code: CH Effective date: 19841017 Ref country code: AT Effective date: 19841017 |
|
REF | Corresponds to: |
Ref document number: 9881 Country of ref document: AT Date of ref document: 19841115 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3166719 Country of ref document: DE Date of ref document: 19841122 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19900817 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19910921 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
EPTA | Lu: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19950801 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19950811 Year of fee payment: 15 Ref country code: FR Payment date: 19950811 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19950818 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19950824 Year of fee payment: 15 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19960921 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19960930 Ref country code: BE Effective date: 19960930 |
|
BERE | Be: lapsed |
Owner name: BLACK & DECKER INC. Effective date: 19960930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19970401 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19970401 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19970603 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |