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This component is a Tapered Support Mount or Cone Bearing Seat, likely designed for use in a heavy-duty mechanical system such as a transmission, gearbox, or final drive. The name "锥支座" (Cone Support) suggests it has a tapered function, possibly to seat a tapered roller bearing or a similar conical component. The part features a robust, cast base with a flat mounting surface (flange) and two downward-extending arms or forks. Crucially, it has an upward-protruding metal shaft with external straight-cut splines/teeth, indicating it engages with another gear or locking mechanism and serves as an anchor or pivot point while transferring rotational motion.