Inner chamber testing fixture for gear chamber of flywheel housing of engine

The invention provides an inner chamber testing fixture for a gear chamber of a flywheel housing of an engine. The inner chamber testing fixture includes a frame-shaped body, wherein the frame-shaped body is corresponding to the outer contour of a gear chamber of a flywheel housing of an engine; a positioning pin 1 and a positioning pin 2 are arranged at the lower position on two sides of the frame-shaped body; the positioning pin 1 and the positioning pin 2 are corresponding to positioning mounting holes of the flywheel housing of an engine; the frame-shaped body is corresponding to the motion trail of a gear 1, the motion trail of a gear 2, the motion trail of a gear 3 and the motion trail of a gear 4 and are provided with a detection plate 1, a detection plate 2, a detection plate 3 and a detection plate 4 downwards; and a rotation handle 1, a rotation handle 2, a rotation handle 3 and a rotation handle 4 are arranged on the frame-shaped body and are corresponding to the detection plate 1, the detection plate 2, the detection plate 3 and the detection plate 4 so that the detection plate 1, the detection plate 2, the detection plate 3 and the detection plate 4 can move along the motion trails of the gear 1, the gear 2, the gear 3 and the gear 4. The inner chamber testing fixture for a gear chamber of a flywheel housing of an engine can detect the inner chamber interference problem of a gear chamber of a flywheel housing of an engine through the simulation effect of the motion trails.