Automatic transmission unit for an electric vehicle

A unit comprising:

• an input element;
• an output element;
• and
• a gear device including a first rotational part, a second rotational part, a third rotational part, and a fourth rotational part arranged in this order on an alignment chart, wherein
• the input element is connectable to the first rotational part and connectable to the second rotational part,
• the output element is connected to the third rotational part,
• the fourth rotational part is switchable between a rotating state and a non-rotating state,
• the gear device includes
• a first planetary gear mechanism including a first rotational element, a second rotational element, and a third rotational element, the second rotational element being disposed between the first rotational element and the third rotational element on the alignment chart, and
• a second planetary gear mechanism including a fourth rotational element, a fifth rotational element, and a sixth rotational element, the fifth rotational element being disposed between the fourth rotational element and the sixth rotational element on the alignment chart,
• the first rotational part is implemented by the first rotational element,
• the second rotational part is implemented by coupling the second rotational element and the sixth rotational element to rotate integrally,
• the third rotational part is implemented by the fifth rotational element, and
• the fourth rotational part is implemented by coupling the third rotational element and the fourth rotational element to rotate integrally.