Reciprocating stroke drive mechanism for jigsaws

Details Reciprocating stroke drive mechanism for jigsaws Reciprocating stroke drive mechanism for jigsaws

1995-12-14

1997-07-08

Payer, Hwei-Siu

Cutlery

Cutting tools

Saw

74 50, B27B 1102

Patent

active

056448465

ABSTRACT:
In order to improve a reciprocating stroke drive mechanism for sabre saws, with a slide (5), with a saw blade (2) which is fastened in a detachable manner to the slide (5), with a slide carrier (7) which forms a slide guide and which is supported in a rotatable manner, a connecting link (9) which is driven in an eccentric manner by a shaft (11) of a motor for the creating of the up and down movement of the slide (5), and with a reciprocating stroke arrangement in such a way that operation of the reciprocating stroke drive mechanism that is as reliable as possible is attained with as few moving parts as possible, it is suggested that the reciprocating stroke drive mechanism include the following: A balancing mass (13) which can be moved up and down vertically with the slide (5) and a pivoting fork (19) which is mounted in a rotatable manner underneath the balancing mass (13) and the first lever arm (18) of which lies against the saw blade (2), and on the second lever arm (20) of which there is configured a sliding surface (17) which is inclined to the horizontal and along which the balancing mass (13) slides for the creating of a horizontal reciprocating stroke movement of the saw blade (2) while exerting a downward-directed vertical pressure.

REFERENCES:
patent: 2781800 (1957-02-01), Papworth
patent: 4238884 (1980-12-01), Walton, II
patent: 4262421 (1981-04-01), Bergler et al.
patent: 4512078 (1985-04-01), Pfanzer
patent: 4628605 (1986-12-01), Clowers
European Search Report (for EPO 94 11 9920) dated May 18, 1995.

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