Abstract

[Problem] To provide a load sensing transmission which is small, effects velocity switching in a smooth manner, and can perform RPM switching safely without requiring a neutral state, and to provide a winch comprising the load sensing transmission. [Solution] When the rotation of a sun gear (14) is transmitted by way of a pinion shaft (6) and planetary gears (17, 18) are thereby rotated, if the rotation of an internally toothed ring gear (19) positioned around the planetary gears (17, 18) is restricted, rotation that has been decreased by the rotation and revolution of the planetary gears (17, 18) is output from a planetary carrier (16). If the planetary gears (17, 18) rotate and revolve without the rotation of the internally toothed ring gear (19) being restricted, rotation that is not decreased is output from the planetary carrier (16). The rotation of the internally toothed ring gear (19) is restricted and freed by a meshing pawl (35) by means of a load sensing mechanism (22). Rotation of the planetary carrier (16) is output by way of a plate (23) comprising a slider, load springs (24, 25), and a plate (30) comprising a cam.

IPC Classes  ?

• B66D 3/16 - Chain or like hand-operated tackles with or without power-transmission gearing between operating member and lifting rope, chain, or cable operated by an endless chain passing over a pulley or a sprocket
• B66D 3/22 - Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing with variable-speed gearing between driving motor and drum or barrel