Drive for rotary compressor

• US 4,684,330 A
• Filed: 08/24/1981
• Issued: 08/04/1987
• Est. Priority Date: 08/28/1980
• Status: Expired due to Fees

• Current Assignee: STAL Refrigeration AB
• Original Assignee: STAL Refrigeration AB
• Inventors: Andersson, Lars, Lundberg, Anders, Ericson, Kjell, Glanvall, Rune
• Primary Examiner(s): Croyle, Carlton R.
• Assistant Examiner(s): Olds, T.
• Application Number:
  US06/295,581
• Time in Patent Office: 2,171 Days
• Field of Search: 418/201, 418/104, 417/360, 74/412, 74/413
• US Class Current: 417/360
• CPC Class Codes: F04C 18/16 with helical teeth, e.g. chevron-shaped, screw type for non-parallel axes of movement F04C18/48
• CPC Class Codes: F04C 29/005 Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
• CPC Class Codes: F16H 1/06 with parallel axes
• CPC Class Codes: Y10T 74/19647 Parallel axes or shafts

Abstract

A compressor of the rotary type is driven by a motor via a gear wheel arranged on the shaft of the compressor and cooperating with a gear wheel arranged on the shaft of the motor, the gear wheels and the shafts being enclosed in a gear housing. The motor is fastened to a detachable wall part of the gear housing, and the motor shaft is journalled solely in the bearings of the motor and protrudes into the gear housing through an opening in the wall part. The opening is provided with sealing means which prevent a medium from forcing its way out of the gear housing. The gear wheels are accessible for dismantling and assembly when the wall part together with the motor is detached from the rest of the gear housing.

Claims

1. In a rotary compressor, the combination of a compressor rotor having a shaft, a rotor housing enclosing said rotor, a motor having a drive shaft, means journalling said drive shaft only in the motor, a gear housing to which the rotor housing is fixedly connected, said rotor shaft and said drive shaft of the motor protruding into the gear housing, gear wheels fixedly connected to the respective shafts in the gear housing and through which said shafts engage each other, the gear housing having a wall part to which said motor is attached, means releasably connecting said wall part to the rest of the gear housing, whereby said wall part and motor are detachable as a unit from said rest of the gear housing, said wall part having an opening through which said drive shaft of the motor extends with a clearance space, sealing means for preventing a medium from forcing its way out of the gear housing through said clearance space, said gear wheels being accessible for dismantling and assembly when said wall part and motor are detached from said restof the gear housing, an intermediate sleeve mounted on said drive shaft and slidable off one end thereof, said sleeve being dimensioned for insertion through said opening in said wall part, one of said gear wheels being mounted on the sleeve and slidable off one end thereof, means releasbly securing said one gear wheel against sliding off the sleeve, and means releasably securing the sleeve against sliding off said drive shaft.

2. The combination of claim 1, in which said sealing means are at least partly mounted on said sleeve.