Power driven tool having a reciprocating shaft arrangement and m

Details Power driven tool having a reciprocating shaft arrangement and m Power driven tool having a reciprocating shaft arrangement and m

1977-10-19

1980-06-10

Davis, Albert W.

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

403272, F16H 2118

Patent

active

042066573

ABSTRACT:
The invention is directed to a power driven tool for reciprocating a cutting element such as a saw-blade or the like and includes a motor housing and a drive motor mounted in the motor housing. A gear case is connected to the motor housing and the shaft arrangement is mounted in the gear case. The shaft arrangement includes a shaft slideably mounted in the gear case for reciprocating movement. The shaft is adapted to receive the cutting element thereon. A U-shaped channel yoke is mounted to the drive shaft in such a manner that the walls of the drive shaft laterally support the U-shaped channel yoke at the base of the yoke. An eccentric drive connects the U-shaped channel yoke with the drive motor for reciprocating the shaft arrangement.
A method of assembling the shaft arrangement includes the step of cutting two slots in the base of the channel yoke to define three bridges one adjacent the other bridging the gap between the leg walls of the yoke. The channel yoke is then inserted into the notch-like cut-out of the shaft so as to cause the channel yoke to engage the annular wall of the shaft in the slots at the bottom region of the cut-out. In this way, the center bridge of the channel is disposed between the inner walls of the shaft. The channel yoke is then brazed to the shaft at the interface between the channel yoke and the shaft.

REFERENCES:
patent: 3055097 (1962-09-01), Douglas
patent: 3204470 (1965-09-01), Brucker
patent: 3751792 (1973-08-01), Frakes
patent: 3945120 (1976-03-01), Ritz

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