US 6,604,437 B1Granted

Intermittent transmission apparatus

AssigneeKubota Corporation

InventorsHiromitsu Yamada, Ryosuke Nogami

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Abstract

An intermittent transmission apparatus according to this invention, broadly, includes a driving element and a driven element. The driving element comprises a first cam having a first cam surface, a second cam having a second cam surface, and an intermediate member displaced between the first and second cams. The driven element comprises a driven element main body having recesses for contacting a plurality of rollers arranged on the intermediate member, bearings erected on the driven element main body to be pushed by the first cam surface, and bearings erected under the driven element main body to be pushed by the second cam surface. During non-drive period of the driven element, the bearings contact a circular arc surface of the second cam, and further the recesses contact the plurality of rollers, to restrict rotation of the driven element.

Claims20

Dependent claims

In an intermittent transmission apparatus wherein continuous torque drive applied to driving element rotatable about a first axis is transmitted to a driven element rotatable about a second axis only during a drive period, and said torque drive is not transmitted to the driven element during a non-drive period, said driving element comprises:

a first cam having a first cam surface;
a second cam displaced from the first cam in a direction along said first axis, and having a second cam surface and a circular arc surface;
and
an intermediate member displaced from said first cam and said second cam in the direction along said first axis and having a rotation restricting means;
and
said driven element comprises:
first engaged members contactable by said first cam surface to receive said torque drive from said driving element during at least part of said drive period;
second engaged members contactable by said second cam surface to receive said torque drive from said driving element during at least part of said drive period, and contactable by said circular arc surface of said second cam to restrict rotation of said driven element during at least part of said non-drive period;
and
a main body of the driven element disposed in a position corresponding to said intermediate member of said driving element in a direction along said second axis, and having recesses on a peripheral surface of said main body, each of said recesses being provided with a contact surface for contacting said rotation restricting means of the intermediate element to restrict rotation of said driven element during at least part of said non-drive period.

7 more elements

Dependencies are inferred from the claim text.