Plow ratchet jack.
Lifting the plow to the transport position and lowering it to the working position It is performed mechanically by means of an automatic ratchet lift. A field wheel is used to drive this lift. The end of the crank axle of this wheel is a sleeve, in which a short shaft with a crank is mounted. The field wheel of the plow is mounted on one end of this roller. The ratchet wheel rotates together with the hub of this wheel, integrally formed with this hub. In the immediate vicinity of the ratchet wheel, there is a ratchet connected to a disc with two alternate notches. The disc is wedged in the shaft and can only turn, when the pawl engages with the rotating ratchet wheel. The crank then rotates as well, which forms one whole with the roller. While rotating, the crank acts on the rod lifting the plow frame. If the crank makes a half turn up, the plow frame is raised to the transport position, and if the plow under its own weight falls to the established one (with a manual spindle) working depth, the crank will make a downward half turn. To lock the plow in the desired position (transport or working) a roll is used, which is located at the end of the two-arm locking lever and is spring loaded against the periphery of the rotating lifting disc. At the time, when the blade has made a half turn, the roller will roll into the blade notch and disengage the pawl from the ratchet wheel.
The plow frame will then be locked in one of two possible positions: in transport or working position.