DEVICE FOR NAILING AND FASTENING Russian patent published in 2008 - IPC B25C1/06 B25C5/15 

FIELD: building.

SUBSTANCE: device for nailing and fastening relates to the sphere of hand tools and contains a frame 1 including a handle 2, with an impulse DC power supplier 3 installed there in and connected with a switcher 4. The central part of the frame 1 incorporates a hollow guiding bucker 5 furnished with a mortise 6 for guiding ledges 7 of a pan push bar 8. Front 9 and rare 10 flanges made of nonferromagnetic material are installed on ends of the guiding bucker 5; a linear motor 11 incorporating a starter 12 and an anchor 13 is arranged between them. The starter 12 contains a cylindrical iron circuit 14; along its axle on frame 15, no less than two starter windings 17 of equal length are set and connected with the impulse DC power supplier 3 according to the scheme of opposite connection. The anchor 13 is capable of sliding along the guiding bucket 5 and contains the front 18 and rare poles 19 set on a plug 20 made of magnetic soft material, which connects them. The anchor poles 18 and 19 can be made of magnetic soft material. Anchor winding is installed between them and connected with the impulse DC power supplier 3, either through brush contacts or by means of a wire. Alternatively the anchor can be made with poles of magnetic hard material (not demonstrated on fig. 1) with magnetic polarisation in radial direction, opposite for each of the poles. The anchor 13 includes additional pole made of magnetic soft material, which is located equidistant from the magnetic poles on the connective plug 20. Cylindrical surfaces of magnetic poles are furnished with radial dissections 31. On external cylindrical surfaces of the magnetic poles, short-circuited spark coils are set separately. Driving spring 25 is installed on the guiding bucket 5, with one of its ends being fixed on a thrust 26, arranged in the rare end of the guiding bucket 5, and the other end being connected with the pan push bar 8. If a driving spring is made in the form of an extension spring 25, its position provides the utmost rare position of the anchor 13. A driving spring made in the form of a compression spring 29 in its utmost front position allows for overlapping by the pan push 8 bar of the guiding channel 23 of the mechanism for nails or cramps feeding 24. In that case, the impulse DC power supplier 3 additionally contains an inverter connected to the anchor winding 21, if anchor poles 18 and 19 are made of magnetic soft material, and to the starter winding 17, if the other two magnetic poles (not demonstrated on fig. 1) are made of magnetic hard material with magnetic polarisation in radial direction, opposite for every pole. To reject the heat from the starter winding 17, the cylindrical iron circuit 14 has a complex face surface, a starter case 15 has a perforation 16, and sliding compressions are arranged on the but ends of the magnetic poles.

EFFECT: improved tool power, smaller dimensions and weight, minimum consumption of energy.

13 cl, 15 dwg