SU712577A1 - Pulsed cam-type speed-varying gear - Google Patents

Description

and the profiles of idle sections are based on the ratio

- P8: hd d

The variator works as follows.

The rotation of the drive shaft 2 through the cams 4 is converted into a swing of the pushers 6, which by means of the free-wheeling mechanisms 5 are transmitted to the driven shaft 3 in the form of rotation pulses. The law of variation of the speed of the driven shaft 3 is determined by the profile of the cams 4.

Moving the control mechanism 8 in the guides 9 of the housing 1 changes the swing amplitude of the point O of the pushers 6, which leads to a change in the number of revolutions of the driven shaft 3 of the variator.

Invention Formula

Cam pulse variator containing the drive and driven shafts, cams mounted on the drive shaft, free-wheeling mechanisms arranged on the driven shaft, associated tappets interacting with cams, and a control mechanism acting on the tappets, characterized in that

in order to ensure a given uniformity of rotation of the driven shaft throughout the entire speed range, the control mechanism is made with guides in which the pushers are mounted with the possibility of longitudinal movement; The profiles of the cam sections are selected from the ratio dU I {+ b 43 l

- y, ()

and the profiles of the idle sections of the cams are chosen from the ratio

dU

 LzShaa -5,

di

where A, B, and are constant coefficients;

a and f / are the angular displacements of the drive and drive shafts of the variator, respectively;

b - coefficient of unevenness of the output shaft;

Ic - the average gear ratio of the variator.

Information sources,

taken into account during exertize

1. Maltsev V.F. Impulsive variators. M., Maschgiz, 1963, p. 12, FIG. 7 (prototye).

-. - 4 .H .-- 5

Claims (1)

Claim A cam pulse variator comprising drive and driven shafts, cams mounted on a drive shaft, freewheel mechanisms, associated pushers interacting with cams, and a control mechanism acting on the pushers, characterized in that, in order to ensure a predetermined uniformity rotation of the driven shaft over the entire speed range, the control mechanism is made with guides in which 5 pushers are installed with the possibility of longitudinal movement; the profiles of the working sections of the cams are selected from the relation ₀ da i _c V 3 g ² J and the profiles of the empty sections of the cams are selected from the relation = A sin at. - IN, - da where A, B, a are constant coefficients; a and U are the angular displacements of the drive and driven shafts of the variator, respectively; About b - the coefficient of unevenness of the driven shaft; i _c - the average gear ratio of the variator.