Gear reducer and lifting device

Abstract

The invention provides a gear speed reducer and a hoisting device. The gear speed reducer comprises a box, an input shaft system, a third shaft system, a fourth shaft system and an output shaft system; the input shaft system comprises a second-level driving gear shaft; the third shaft system comprises a second-level driven gear and a third-level driving gear shaft; the second-level driving gear shaft is engaged with the second-level driven gear which is fixedly connected with the third-level driving gear shaft; the fourth shaft system comprises a third-level driven gear and a fourth-level driving gear shaft; the third-level driving gear shaft of the third shaft system is engaged with the third-level driven gear which is fixedly connected with the fourth-level driving gear shaft; the output shaft system comprises a fourth-level driven gear and an output gear shaft which is a hollow gear shaft; and the third-level driving gear shaft of the third shaft system is sleeved with the output gear shaft which is coaxial with the third-level driving gear shaft; and the fourth-level driving gear shaft of the fourth shaft system is engaged with the fourth-level driven gear which is fixedly connected with the output gear shaft.

Description

technical field [0001] The invention relates to mechanical technology, in particular to a gear reducer and a lifting device. Background technique [0002] The reducer is a common mechanical transmission device in the field of mechanical technology, and its applications involve various industries such as metallurgy, nonferrous metals, coal, building materials, ships, water conservancy, electric power, construction machinery and petrochemicals. Taking the blowout preventer lifting device of the oil drilling rig as an example, the air control chain hoist is usually used to realize the lifting operation of the blowout preventer, and the air motor drives the chain hoist to drive the blowout preventer to move up and down after being decelerated by the lifting reducer. [0003] Currently commonly used reducers include planetary gear reducers and gear reducers; however, planetary gear reducers have complex structures, high manufacturing costs, and are not easy to maintain; although ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a gear reducer and a lifting device to solve the problems of complex structure, bulky size and high manufacturing cost of the reducer in the prior art. Through the sleeve of the hollow gear shaft and the solid gear shaft and the feedback transmission structure, the A gear reducer with a large transmission ratio, small size, simple structure, and low cost and a hoisting device using the gear reducer

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