| 摘要 |
<p>1537352 Rotary driving tools such as wrenches EDORMA 3 Feb 1976 [16 June 1975] 04192/76 Heading B3N In an apparatus for rotatably driving articles such as nuts, bolts and pipes or in particular, the end supporting collar (41, Fig. 1, not shown) of a counterbalancing torsion spring (38) in a door lifting mechanism in order to pre-tension the spring, a casing 47, Fig. 5, rotatably supports a drive member 74 which has a slot for accommodating the article to be driven and, as shown, is in the form of a spur gear. The drive member is rotated by a power transmission, gearing 84, which may be connected to an internal motor, electric motor 68 or by an external motor, power tool (143, Fig. 7, not shown) and is drivingly connectible to the article to be rotated by means which, when the article is the spring end supporting collar in Fig. 1 (not shown) having radial bores, comprises a disc 53, Fig. 2, bolted to member 74 and carrying adjustably mounted pins 56, 57, 58 for engaging the radial bores. The pins may, be spring-loaded. The apparatus in Fig. 7, not shown, has a different gearing arrangement and in a further arrangement an "hourglass" worm driven directly by the motor may itself directly drive the member 74.</p> |
