초록 ▼

A setting tool for driving in fastening elements includes a drive piston (13) displaceable in a piston guide (11) between its initial (32) and setting positions, and device for returning the drive piston (13) in its initial position upon completion of a setting process and having an electromotive dr

A setting tool for driving in fastening elements includes a drive piston (13) displaceable in a piston guide (11) between its initial (32) and setting positions, and device for returning the drive piston (13) in its initial position upon completion of a setting process and having an electromotive drive (30) and a transmission (20) for transmitting a motive actuating torque to the drive piston (13).

대표청구항 ▼

1. A setting tool for driving fastening elements comprising a piston guide (11); a drive piston (13) displaceable in the piston guide (11) between an initial position thereof (32) and a setting position thereof in which the drive piston drives in a fastening element; and means for returning the driv

1. A setting tool for driving fastening elements comprising a piston guide (11); a drive piston (13) displaceable in the piston guide (11) between an initial position thereof (32) and a setting position thereof in which the drive piston drives in a fastening element; and means for returning the drive piston (13) in the initial position thereof upon completion of a setting process, the drive piston returning means having an electromotive drive (30) and transmission means (20) for transmitting a motive actuating torque to the drive piston (13).2. A setting tool according to claim 1, wherein the electromotive drive (30) is formed as a d.c. motor.3. A setting tool according to claim 1, wherein the transmission means (20) comprises a least one friction wheel (21, 22) engaging a drive shaft (14).4. A setting tool according to claim 3, wherein the transmission means (20) comprises a gear unit (26) having a drive side thereof connected with the electromotive drive (30), and a driven side thereof connected with the at least one friction wheel (21, 22).5. A setting tool according to claim 4, further comprising a free-running gear (27) arranged between the gear unit (26) and the at least one friction wheel (21).6. A setting tool according to claim 3, wherein the at least one friction wheel (21, 22) is elastically biased in a direction toward the drive piston shaft (14).7. A setting tool according to claim 6, comprising elastic support means for biasing the at least one friction wheel in a direction toward the drive piston shaft (14).8. A setting tool according to claim 6, wherein the at least one friction wheel (21, 22) is provided with acting in a setting direction (40), support means having a counter lock (25) for the drive piston (13).9. A setting tool according to claim 1, further comprising switch means (31) provided in the piston guide (11) for detecting presence of the drive piston (13) in the initial position (32) thereof.10. A setting tool according to claim 9, wherein the switch means (31) is formed as a magnetoresistive sensor.11. A setting tool according to claim 1, comprising adjustment means (34) having a plurality of driving power positions; and a control unit (33) for controlling the electromotive drive (30) and operatively connected with the adjustment means (34) for actuating the electromotive drive means (30) in accordance with a driving power position selected by a setting tool operator to provide for displacement of the drive piston (13) in a setting direction (40) by an amount that provides for driving the drive piston (13) with a predetermined, by the tool operator, driving power.