Double speed reducer unit assembly

Details Double speed reducer unit assembly Double speed reducer unit assembly

1975-01-15

1977-05-31

Scott, Samuel

Machine element or mechanism

Gearing

Directly cooperating gears

F16H 116

Patent

active

040261638

ABSTRACT:
An auxiliary speed reducer unit can be detachably mounted upon a main speed reducer unit to form a compound speed reducer. The main unit includes a housing and a worm shaft rotatably journalled therein with an end portion of the worm shaft extending from the housing. The auxiliary unit has a housing with an opening therein for receiving the end portion of the main unit worm shaft. An input worm shaft is rotatably journalled within the auxiliary housing and has a worm thereon that meshes with a worm gear. Within the worm gear is a central bore of a size to receive and key with the end portion of the main unit worm shaft. Annular grooves on opposite faces of the worm gear receive annular projections having a radial width less than said grooves. The projections extend from opposite sides of the auxiliary unit housing to support the worm gear in a loosely rotatable manner for limited play in the plane of the gear while the gear is in mesh with the input worm. The gear is held in a position with the central bore in approximate alignment with said auxiliary housing opening prior to connection of said worm gear to the main unit worm shaft. Thus, connection of the worm gear and worm shaft can be readily made by insertion under field conditions. After such connection and further mounting of the auxliary unit housing to said main unit housing, the worm gear is carried by the worm shaft of the main unit and both the worm gear and worm shaft are free from engagement with said auxiliary housing.

REFERENCES:
patent: 852762 (1907-05-01), Bohrer
patent: 1890685 (1932-12-01), Johnson

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