The invention discloses a flexible gear, a
harmonic reducer and an
industrial robot, and relates to the field of
harmonic reducers. The flexible gear comprises a
barrel and a
flange, the
barrel comprises a
barrel part and a partition part, the barrel part is provided with a first inner hole and an outer
tooth part, the partition part is connected to the end, away from the outer
tooth part, of the barrel, and the partition part surrounds the barrel part and is connected with the barrel part. A connecting part is arranged at the end, away from the cylinder part, of the partition part and connected with the
flange. The
flange and the cylinder body of the flexible gear are manufactured separately, so that the cylinder body can be quickly formed by adopting processes such as
spinning and
stamping when being manufactured, the
processing steps of the cylinder body can be simplified, and the
processing time can be shortened. When the flange is manufactured, the
modes of
casting,
forging,
powder metallurgy,
machining and the like can be adopted. And in the assembling stage, the cylinder body is fixedly connected with the flange through the connecting part, so that a flexible gear finished product is assembled. Compared with a flexible gear integrally machined and formed in the prior art, the flexible gear is small in
machining difficulty, low in manufacturing cost and high in production efficiency.