Pin dismounting device for pin coupling

The utility model belongs to the technical field of mechanical equipment maintenance, and particularly relates to a pin dismounting device for a pin coupling. Comprising a main working frame and an auxiliary working frame, a first bolt hole is formed in the main working frame, a bolt sleeve is in threaded connection with the interior of the first bolt hole, a second bolt hole is formed in the bolt sleeve, an adjusting bolt is in threaded connection with the interior of the second bolt hole, a main rack is fixedly connected to the upper end of the main working frame, a plurality of main comb teeth are arranged on the main rack, and a third bolt hole is formed in the top end of each main comb tooth. An arched through hole is formed in the auxiliary working frame, an auxiliary rack is fixedly connected to the top end of the auxiliary working frame, a plurality of auxiliary comb teeth are arranged on the auxiliary rack, and through 4 # bolt holes are formed in the auxiliary rack among the auxiliary comb teeth. Th