| 摘要 |
A double acting ratchet mechanism is arranged as a ratchet wheel installed on a shaft with inner teeth with possibility of circular periodical rotation, its teeth are in periodic interaction with a ratchet installed on the pin with possibility of swinging motion, at above it is in interaction with a compression spring. The mechanism is arranged as an eccentric shaft with eccentricity installed on two bearings fixed in two covers at two sides and mounted to cylindrical body in which inside radial slots are provided at two sides in sequential order, there with possibility of axial periodical displacement ratchets are installed, those in the body are in interaction with one ends with the openings of the pins with possibility of swinging motion, at the middle the ratchets are in interaction with the pushers, those at the other end with cylindrical surfaces are in interaction with eccentric surface of the eccentric shaft with the larger surfaces, and with the inner ends of the free ends the ratchets interact with the conical compression springs, and the mechanism itself is installed to the cup that is fixed to the body, and to the right end of the eccentric shaft that is out of the boundaries of the cup a handle for switch of the position of the mechanism is fixed, this has two radially opposite positions only. To the cup a hub is placed coaxially, to that by means of pins two ratchet wheels are installed. The first ratchet wheel provides rotation of the shaft to one side, and the other ratchet wheel – to the opposite side. |
