Demonstration instrument for cam inversion principle

The utility model discloses a demonstration instrument for the cam inversion principle. A first support base is parallel to a second support base, an installing plate is arranged on the outer side of the first support base, a displacement line drawing board is fixed above the installing plate and provided with LED lamps, a stepping motor is installed on a support and connected with an axle on the outer side of the first support base through a coupler, a first guide plate is installed over the installing plate, a first roller shaft is arranged at one end of a first push rod, a first pointer is fixedly installed at the other end of the first push rod, and a driving gear is connected and meshed with a driven gear; a second guide plate is fixed to a center plate of the driven gear, and the outer circle of a second bearing is attached to the periphery of a right cam. The demonstration instrument can demonstrate the design process of a cam profile curve inversion method and can reflect the movement rule of the push rod. The phenomenon that real cams are rotated forwards, and the push rod is still is compared with the assumed movement state of movement inversion of the push rod and the assumed movement state of cam fixation together, people can clearly understand the cam inversion principle, and the movement trail of the push rod reappears.