SU83872A1 - Hrapova variable transmission - Google Patents

Description

In the well-known ratchet gears intended for use in mechanisms requiring intermittent movement of the driven shaft, the gear ratio is varied by means of slug-curved control mechanisms.

The described gear, in order to simplify the design and allow the gear ratio between the driving and driven shafts to change throughout the entire range from 0 to 1, consists of a ratchet rigidly mounted on the driven shaft and a pawl mounted on the driving shaft and controlled the end of a stationary drum rearranged along the axis.

The change in gear ratio is carried out by the return-and-forward movement of the hollow drum along its axis, as a result of which the central angle at which the dog is engaged with the ratchet wheel is changed.

Such a transmission has a simpler design and provides a gear ratio from 0 to 1.

FIG. I schematically shows the transmission in section along the axis; in fig. 2 c 3 the same, respectively, from the end and in the plan.

The drive shaft 1 is connected with the driven shaft 2 through the cover 5, the axis 4, the dog 5 sitting on it, and the ratchet wheel 6 rigidly mounted on the driven shaft. The housing 7 attached to the flap ensures that the pawl with the axle is in a normal working position. A hollow drum 8 with an end made along a helical line, moving along the axis of the shaft, changes the value of the central angle at which the dog is engaged with the ratchet wheel, which results in a change in the gear ratio in the range from 0 to I.

Subject invention

Ratchet variable transmission, characterized in that, in order to change the gear ratio between the driving and driving shaft from O to 1, a hollow drum is used with an end made along a helix, moving along the transmission axis, the central angle changes where the dog is engaged with the ratchet koleome.

Fig