Gear reducer comprising a worm and a worm gear assembly provided with a torque limiter

摘要

A gear reducer comprising a worm and a worm gear assembly, in turn comprising a worm gear, which is connected/disconnected to/from a drive shaft by means of a torque limiter mounted on this latter. The gear reducer is characterized in that the drive shaft and the torque limiter are comprised in a cartridge which can be extracted/inserted from/in a cavity obtained in the worm gear assembly according to an axial direction and in accordance with two opposite senses, without the need to disassemble the worm.

主权项

1. A gear reducer comprising:
a worm; and a worm gear assembly, the worm gear assembly comprising a worm gear, which is connected/disconnected to/from a drive shaft by means of a torque limiter mounted on this latter; wherein said drive shaft and said torque limiter are comprised in a cartridge which can be extracted/inserted from/in a cavity obtained in said worm gear assembly according to an axial direction and in accordance with two opposite senses, without the need to disassemble said worm; wherein between said worm gear and said drive shaft there is interposed a worm gear-carrier hub, on which said worm gear is fitted, said worm gear-carrier hub being separate from said drive shaft and being supported by respective support means, which are independent of said drive shaft; and wherein the worm gear-carrier hub is provided with a plurality of radial holes, suited to allow the passage of a lubricating oil from an area occupied by the worm to an area in which the torque limiter is housed.