TRANSMISSION UNIT AND POWER SYSTEM

To provide a transmission unit which enables a second driving source to be installed efficiently at a first driving source to achieve hybridization, and to provide a power system.SOLUTION: A clutch unit 20 includes: a coupling element 23 which couples an output shaft 13 of an engine to an input shaft 16 of a hydraulic pump which is driven by a driving force of the engine, in a manner that power can be transmitted therebetween; and a motor generator 18 which generates a driving force separately from the engine. The coupling element 23 includes: a driving side coupling part 23a which is coupled to a first coupling part 11a provided at the output shaft 13; and a driven side coupling part 23b which is coupled to a second coupling part 15a which is provided at the input shaft 16 and may be coupled to the first coupling part 11a.SELECTED DRAWING: Figure 8 【課題】第一の駆動源に第二の駆動源を効率よく設置してハイブリッド化することができる伝動ユニットおよび動力システムを提供する。【解決手段】クラッチユニット２０は、エンジンの出力軸１３と、前記エンジンの駆動力により駆動される油圧ポンプの入力軸１６と、を動力伝達可能に連結する連結要素２３と、前記エンジンとは別に駆動力を発生させるモータジェネレータ１８と、を備え、前記連結要素２３は、前記出力軸１３に設けられた第一連結部１１ａに連結される駆動側連結部２３ａと、前記入力軸１６に設けられ、前記第一連結部１１ａと連結可能な第二連結部１５ａに連結される被駆動側連結部２３ｂと、を備えている。【選択図】図８