PLANETARY GEAR TRAIN WITH IMPROVED BEARING STRUCTURE AND MANUFACTURE METHOD OF THE SAME

• US 20120051915A1
• Filed: 02/10/2011
• Published: 03/01/2012
• Est. Priority Date: 08/31/2010
• Status: Abandoned Application

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: NISHIDA, Hideaki, suzuki, Kazutaka, TAKAYANAGI, Kazufumi, YOSHIDA, Takafumi, UESATO, Motohisa, KUSAKA, Masahiro
• Application Number:
  US13/024,734
• Publication Number:
  US 20120051915A1
• Time in Patent Office: Days
• US Class Current: 416/170.R
• CPC Class Codes: F03D 15/00 Transmission of mechanical power
• CPC Class Codes: F03D 15/10 using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members
• CPC Class Codes: F03D 80/70 Bearing or lubricating arrangements
• CPC Class Codes: F05B 2230/232 by welding
• CPC Class Codes: F05B 2260/40311 of the epicyclic, planetary or differential type
• CPC Class Codes: F16C 17/022 with a pair of essentially semicircular bearing sleeves
• CPC Class Codes: F16C 17/04 for axial load only
• CPC Class Codes: F16C 2226/36 by welding
• CPC Class Codes: F16C 2360/31 Wind motors in general F03D
• CPC Class Codes: F16C 2361/61 Toothed gear systems, e.g. support of pinion shafts in general F16H57/02
• CPC Class Codes: F16C 33/08 Attachment of brasses, bushes or linings to the bearing housing
• CPC Class Codes: F16H 37/041 for conveying rotary motion with constant gear ratio
• CPC Class Codes: F16H 57/082 Planet carriers
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49464 Assembling of gear into force transmitting device

Abstract

A planetary gear train is provided with a planetary gear and a planetary pin inserted into the planetary gear. The planetary gear includes: a gear member having teeth on the outer face and a through hole; an intermediate housing inserted into the through hole and having an insert hole into which the planetary pin is inserted; and a plurality of sliding bearing members jointed onto the insert hole of the intermediate housing. The plurality of sliding bearing members form a sliding bearing which sustains the planetary pin and the planetary gear to be rotatable with each other.

Claims

1. A planetary gear train, comprising:

a planetary gear; and

a planetary pin inserted into said planetary gear,

wherein said planetary gear includes;

a gear member having teeth formed on an outer face thereof and provided with a through hole;

an intermediate housing inserted into said through hole and provided with an insert hole into which said planetary pin is inserted; and

a plurality of sliding bearing members jointed onto said insert hole of said intermediate housing, and

wherein said plurality of sliding bearing members form a sliding bearing which sustains said planetary pin and said planetary gear to be rotatable with each other.

2. The planetary gear train according to claim 1, wherein said intermediate housing and said sliding bearing member are jointed so as not to be detachable, and

wherein said planetary gear and said intermediate housing are jointed so as to be detachable.

3. The planetary gear train according to claim 2, wherein said intermediate housing and said sliding bearing member are welded, and

wherein said planetary gear and said intermediate housing are jointed with shrink fitting.

4. The planetary gear train according to claim 1, further comprising a carrier connected to said planetary pin,

wherein said intermediate housing includes at least one thrust pad serving as a thrust bearing provided on a surface opposed to said carrier.

5. The planetary gear train according to claim 4, wherein the number of said at least one thrust pad is two or more, and

wherein said thrust pads are circumferentially arranged to be separated from each other.

6. A bearing structure, comprising:

an intermediate housing to be inserted into a through hole provided through a gear member having teeth formed on an outer surface thereof and having an insert hole into which a pin is inserted; and

a plurality of sliding bearing members jointed onto said insert hole of said intermediate housing,

wherein said plurality of sliding bearing members form a sliding bearing.

7. The bearing structure according to claim 6, wherein said intermediate housing and said sliding bearing member are jointed so as not to be detachable, and

wherein said planetary gear and said intermediate housing are jointed so as to be detachable.

8. The bearing structure according to claim 6, wherein said plurality of sliding bearing members include:

a surface layer made of resin material; and

a back metal backing up said surface layer.

9. The bearing structure according to claim 6, wherein said intermediate housing includes at least one thrust pad serving as a thrust bearing.

10. A wind turbine generator, comprising:

a wind turbine rotor including a rotor head and a wind turbine blade coupled to said rotor head;

a gear box including an input shaft jointed to said rotor head; and

a generator jointed to an output shaft of said gear box,

wherein said gear box includes a planetary gear train,

wherein said planetary gear train includes a planetary gear; and

a planetary pin inserted into said planetary gear,

wherein said planetary gear includes;

a gear member having teeth formed on an outer surface thereof and provided with a through hole;

an intermediate housing inserted into said through hole and provided with an insert hole into which said planetary pin is inserted; and

a plurality of sliding bearing members jointed onto said insert hole of said intermediate housing and arranged in a circumferential direction of said planetary pin, and

wherein said plurality of sliding bearing members form a sliding bearing which sustains said planetary pin and said planetary gear to be rotatable with each other.

11. A manufacture method of a planetary gear having a structure in which a planetary pin is inserted through an insert hole of a planetary gear train, said method comprising steps of:

providing an intermediate housing through which said insert hole is provided;

jointing a plurality of sliding bearing members onto said insert hole of said intermediate housing, said sliding bearing members forming a sliding bearing; and

fitting said intermediate housing into a through hole of a gear member having teeth on an outer face thereof.

12. The manufacture method according to claim 11,

wherein said intermediate housing and said sliding bearing member are jointed so as not to be detachable, and

wherein said planetary gear and said intermediate housing are jointed so as to be detachable.

13. The manufacture method according to claim 12, wherein said intermediate housing and said sliding bearing member are welded, and

wherein said planetary gear and said intermediate housing are jointed with shrink fitting.