Drum motor

• US 3,892,144 A
• Filed: 05/01/1973
• Issued: 07/01/1975
• Est. Priority Date: 05/04/1972
• Status: Expired due to Term

• Current Assignee: John Kirk Kirkegaard
• Original Assignee: John Kirk Kirkegaard
• Inventors: Kirkegaard, John Kirk
• Primary Examiner(s): Wyche, Benjamin W.
• Assistant Examiner(s): McKenzie, Jr., Frank H.
• Application Number:
  US05/356,181
• Time in Patent Office: 791 Days
• Field of Search: 74/801,804,805,391,75R 259/81,84,3,177R
• US Class Current: 475/149
• CPC Class Codes: B65G 23/08 with self-contained driving mechanisms, e.g. motors and associated gearing
• CPC Class Codes: Y10T 74/19545 Central driving shaft in axle

Abstract

A drum motor, preferably for driving a conveyor belt or similar transportation means, and provided between the motor armature and the rotating drum with a gear transmission system comprising two sets of planet gears at one end of the drum, which is supported by means of journals extending through the end covers of the drum and adapted to be mounted in an outer frame, the journal at the end of the drum opposite to the planet gear end being secured to a stator end cover and the planel wheels of the other planet gear set being in engagement with an internal toothing in the rotating drum, characterized in that the stator is connected to the annular wheel of the first planet gear set, and that the planet gear retaining member of the second planet gear set, which is rigidly connected to the journal at the planet gear end of the drum secured to said annular wheel.

Claims

1. A drum motor comprising a rotatable outer drum rotatably mounted on fixed axial journals at either end thereof, a fixed internal motor stator secured to said journals, a rotatable motor armatUre rotatably mounted on said journals, a first sun wheel secured to said armature, a first set of rotatable planet wheels meshing with said first sun wheel and with a fixed annular gear member secured to said stator, a carrier for said planet wheels rotatably mounted in a fixed member secured to said stator and having a second sun wheel secured thereto, a second set of planet wheels rotatably mounted on said fixed member and meshing with said second sun wheel and with an internal toothing on said drum.

2. A drum motor as recited in claim 1, and further comprising end covers on said outer drum through which said journals extend.

3. A drum motor as recited in claim 2, wherein the interior of said drum is filled with an oil.

4. A drum motor as recited in claim 1, wherein one of said journals is provided with an axially extending passage through which electricity supply leads for said motor may pass.