Hybrid working machine

• US 8,205,719 B2
• Filed: 01/12/2010
• Issued: 06/26/2012
• Est. Priority Date: 02/03/2009
• Status: Active Grant

• Current Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: Sora, Toshio
• Primary Examiner(s): Mansen, Michael
• Assistant Examiner(s): TRUONG, MINH D
• Application Number:
  US12/685,976
• Publication Number:
  US 20100193296A1
• Time in Patent Office: 896 Days
• Field of Search: 184/14, 184/6.12, 56/123, 475/160, 310/67.R, 310/113, 310/75.D, 746/06.A
• US Class Current: 184/14
• CPC Class Codes: E02F 9/0866 Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
• CPC Class Codes: E02F 9/20 Drives; Control devices gearings in general F16H; controlling in general G05; electric multi-motor drives H02K, H02P
• CPC Class Codes: F16D 1/101 without axial retaining means rotating with the coupling
• CPC Class Codes: F16D 2001/103 the torque is transmitted via splined connections
• CPC Class Codes: F16D 2300/06 Lubrication details not provided for in group F16D13/74
• CPC Class Codes: F16H 57/04 Features relating to lubrication or cooling or heatingin hydrokinetic gearing F16H41/30; control of lubrication or cooling in hydrostatic gearing F16H61/4165
• CPC Class Codes: H02K 7/003 Couplings; Details of shafts means for mounting rotors on shafts H02K1/28
• CPC Class Codes: H02K 7/1815 structurally associated with reciprocating piston engines general aspects of generating sets, e.g. housing, F02B63/04

Abstract

As lubricating construction for a spline coupling portion for connecting a rotating shaft of a generator-motor and a rotating shaft of a hydraulic pump both actuated by an engine, a lubricating oil chamber communicating with the spline coupling portion is formed within a motor casing of the generator-motor, while in a pump casing of the hydraulic pump there is formed an oil passing hole providing communication between the lubricating oil chamber and an oil chamber in the hydraulic pump on an outer periphery side of the rotating shaft of the hydraulic pump, thereby forming an oil passage for allowing working oil present within the hydraulic pump to circulate through a route including the spline coupling portion.

Claims

1. A hybrid working machine comprising:

a generator-motor adapted to be operated by an engine;

a hydraulic pump having a rotating shaft coupled directly to a rotating shaft of said generator-motor by spline coupling; and

a shaft lubricating device for lubricating a spline coupling portion coupled by said spline coupling,

wherein said shaft lubricating device comprises an oil passage allowing working oil present within said hydraulic pump to circulate through a route including said spline coupling portion, said oil passage being formed within a casing for covering said spline coupling portion, said oil passage comprising;

a lubricating oil chamber formed within a motor casing of said motor-generator, said lubricating oil chamber communicating with said spline coupling portion,

an oil chamber in a pump casing of said hydraulic pump, said oil chamber of said hydraulic pump extending radially outward of the outer periphery of said rotating shaft of said hydraulic pump, and

an oil passing hole formed in the pump casing of said hydraulic pump, the oil passing hole communicating between said lubricating oil chamber formed within the motor casing of said motor-generator and said oil chamber of said hydraulic pump, the oil passing hole extending along a portion radially external of the outer periphery of said rotating shaft of said hydraulic pump.

2. The hybrid working machine according to claim 1, wherein said oil passing hole extends along an axial direction of said rotating shaft.