Friction-wheel planetary gear with bevel gears
First Claim
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1. A friction-wheel epicyclic gear, comprising a power takeoff shaft;
- a friction wheel;
bevel wheels which roll on said friction wheel;
a gear wheel by which said bevel wheels drive said power takeoff shaft, said bevel wheels and said friction wheels being arranged so that a contact pressure between said bevel wheel and said friction wheel is variable;
means for detecting a slip between said bevel wheels and said friction wheel, and said contact pressure being variable as a function of the slip;
an additional bevel wheel with an additional pinion provided on said additional bevel wheel and meshing with an additional gear wheel; and
a device detecting and comparing rotary speeds of said gear wheel and said additional gear wheel, said contact pressure being variable as a function of a difference in the rotary speeds.
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Abstract
A friction-wheel epicyclic gear (10, 10a) is proposed. The friction-wheel epicyclic gear (10, 10a) has bevel wheels (12, 42), which roll on a friction wheel (14) and drive a gear output shaft (26). The contact pressure between the bevel wheels (12, 42) and the friction wheel (14) is variable. A detection of the slip between the bevel wheels (12, 42) and the friction wheel (14) is provided, and the contact pressure is variable as a function of the slip. In this way, the friction-wheel epicyclic gear (10, 10a) can always be operated at the slip limit, so that the wear is only slight and the efficiency is high.
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Citations
7 Claims
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1. A friction-wheel epicyclic gear, comprising a power takeoff shaft;
- a friction wheel;
bevel wheels which roll on said friction wheel;
a gear wheel by which said bevel wheels drive said power takeoff shaft, said bevel wheels and said friction wheels being arranged so that a contact pressure between said bevel wheel and said friction wheel is variable;
means for detecting a slip between said bevel wheels and said friction wheel, and said contact pressure being variable as a function of the slip;
an additional bevel wheel with an additional pinion provided on said additional bevel wheel and meshing with an additional gear wheel; and
a device detecting and comparing rotary speeds of said gear wheel and said additional gear wheel, said contact pressure being variable as a function of a difference in the rotary speeds. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a friction wheel;
Specification