IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0898391
(2001-07-03)
|
우선권정보 |
DE-0032949 (2000-07-06) |
발명자
/ 주소 |
- Rahmsdorf, Horst
- Hofbrucker, Thomas
- Looser, Markus
- Bader, Thomas
|
출원인 / 주소 |
|
대리인 / 주소 |
Sidley Austin Brown & Wood, LLP
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
5 |
초록
▼
A screw driving tool including a housing (1), a hollow spindle (3) rotatably supported in the housing (1) with a possibility of a limited axial displacement relative thereto, a screw-in spindle 5 at least partially extending in the hollow cylinder (3), connected thereto for joint rotation therewith,
A screw driving tool including a housing (1), a hollow spindle (3) rotatably supported in the housing (1) with a possibility of a limited axial displacement relative thereto, a screw-in spindle 5 at least partially extending in the hollow cylinder (3), connected thereto for joint rotation therewith, and supported for a limited axial displacement relative thereto, an impact mass (15) for displacing the screw-in-spindle (5) in a screw-in direction, a drive motor (2) for rotating the screw-in spindle (5), and a clutch (6) located between the hollow spindle (3) and the drive motor output shaft (19) for transmitting rotational movement to the hollow spindle (3).
대표청구항
▼
1. A screw driving tool for screwing a screw into a constructional component, comprising a housing (1); a hollow spindle (3) rotatably supported in the housing (1) having limited axial displacement relative thereto; a screw-in spindle (5) at least partially extending in the hollow spindle (3), conne
1. A screw driving tool for screwing a screw into a constructional component, comprising a housing (1); a hollow spindle (3) rotatably supported in the housing (1) having limited axial displacement relative thereto; a screw-in spindle (5) at least partially extending in the hollow spindle (3), connected thereto for joint rotation therewith and supported for a limited axial displacement relative thereto; an impact mass (15) cooperating with a surface of the screw-in spindle (5) for displacing the screw-in spindle (5) in a direction in which the screw is screwed into the constructional component; a drive motor (2) for rotating the screw-in spindle (5) and having an output shaft (19); and a clutch (6) located between the hollow spindle (3) and the drive motor output shaft (19) for transmitting rotational movement to the hollow spindle (3) and thereby to the screw-in spindle (5). 2. A screw driving tool according to claim 1, further comprising at least one ball-shaped locking member (13) for connecting the screw-in spindle (5) to the hollow spindle (3) for joint rotation therewith, the hollow spindle (3) having a radial bore (14) in which the ball-shaped locking member (13) is received, and the screw-in spindle (5) having an elongate groove (12) into which the ball-shaped locking member (13) projects. 3. A screw driving tool according to claim 1, wherein the clutch (6) includes at least one spring (9, 10), the hollow spindle (3) being displaceable in a direction opposite the screw-in direction against the biasing force of the at least one spring (9, 10) into an operational position thereof in which the hollow spindle (3) is operationally connected with the output shaft (19) of the drive motor (2), whereby the rotational movement of the output shaft (19) is transmitted to the hollow spindle (3) and thereby to the screw-in spindle(s). 4. A screw driving tool according to claim 1, wherein the hollow spindle (5) extends through the clutch (6). 5. A screw driving tool according to claim 1, further comprising a gear unit (24) for transmitting rotation of the output shaft (19) of the drive motor (2) to the hollow spindle (3) and including a tooth gear (11), the hollow spindle (3) extending through the tooth gear (11). 6. A screw driving tool according to claim 5 wherein the clutch (6) has a first member (7) fixedly connected with the hollow spindle (3), a second, freely rotatable member (8) axially displaceable relative to the hollow spindle (3), and first and second springs (9, 10) for biasing, respectively, the first and second clutch members (7, 8) in the screw-in direction, the first clutch member (7) being fixedly connected with the hollow spindle (3) and displaceable therewith against a biasing force of the first spring (9) toward the second clutch member (8), and the second clutch member (8) being displaceable against a biasing force of the second spring (10) into engagement with the tooth gear (11). 7. A screw driving tool according to claim 1, further comprising an electromagnet (17) for displacing the impact mass (15) in the screw-in direction. 8. A screw driving tool according to claim 7, further comprising electronic means for controlling displacement of the impact mass (15) and connected with one of a to-be-screwed-in screw (22) and the screw-in spindle (5) and with a constructional component into which the screw is to be screwed in, the electronic means generating, in response to the screw contacting the constructional component, a control signal for actuating the electromagnet (17), whereby the displacement of the impact mass (15) in the screw-in direction takes place.
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