| 摘要 |
The present invention relates to a pumping device (1) in connection with saw chain lubrication, especially in connection with a hand-held device, e.g. a chain saw, said pumping device (1) including a pumping house (7), a piston (9) that is received in the pumping house (7) and means (3, 10, 11, 12) to bring the piston (9) to rotate and simultaneously perform a reciprocating motion in its longitudinal direction, said means including on one hand a worm pinion (3) having means (25) for driving cooperation with a prime mover (15, 19) and on the other hand a gear pinion (10) mounted on the piston (9). The invention further relates to a worm pinion, preferably included in a device for saw chain lubrication. The invention is characterized in that said worm gear (3) on one hand includes a spirally shaped element (28), prefabricated as a separate detail, and intended to cooperate with the gear pinion (10), and on the other hand a sleeve shaped element (18) that supports said spirally shaped element (28). |
