Arrangement for tightening screw connections

Details Arrangement for tightening screw connections Arrangement for tightening screw connections

1994-07-20

1997-04-08

Smith, Scott A.

Tool driving or impacting

Automatic control of power operated means

Drive means responsive to torque or speed condition

173222, B25B 2100

Patent

active

056179243

ABSTRACT:
An arrangement for tightening screw connections comprises a screw spindle turnable by a screw tool, at least two-stage rotary drive for the screw spindle, the drive providing a coarse driving for pre-tightening of a screw connection and a fine driving for obtaining the desired screwing condition, a measuring value pick up for obtaining measuring values which correspond to a value of an available screwing condition, a control device for providing switching signals for the rotary drive in dependence on the measuring values determined by the measuring value pick up, the screw spindle being subdivided into at least three spindle parts, including a first spindle part connected with the drive motor for providing the coarse driving, a second spindle part, and a third spindle part, and an auxiliary drive providing the fine driving and having a drive element which together with the auxiliary drive form an independently operating structural unit which forms the second spindle part and is integrated between the first spindle part connected with the drive motor and the third spindle part carrying the mounting device, the auxiliary drive having a shaft provided with couplings for fixed connection with the first spindle part and the third spindle part, the auxiliary part further having a torque incresing transmission arranged so that the shaft is driven by the drive element through the transmission.

REFERENCES:
patent: 3596718 (1971-08-01), Fish et al.
patent: 3724558 (1973-04-01), Rundell et al.
patent: 3897834 (1975-08-01), Swopsher et al.
patent: 4008773 (1977-02-01), Wallace et al.
patent: 4161221 (1979-07-01), Carlin et al.
patent: 4403663 (1983-09-01), Janssen
patent: 4609089 (1986-09-01), Kobayashi et al.
patent: 5005654 (1991-04-01), Moriki et al.

Affiliated with

Also associated with

Rating

Arrangement for tightening screw connections does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arrangement for tightening screw connections, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for tightening screw connections will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2393271