Transmission apparatus

• US 7,297,084 B2
• Filed: 02/25/2003
• Issued: 11/20/2007
• Est. Priority Date: 02/25/2002
• Status: Expired due to Fees

• Current Assignee: Ebara Corporation
• Original Assignee: Ebara Corporation
• Inventors: Miwa, Toshio, Sugiyama, Kazuhiko, Kimura, Katsumi, Usami, Ken, Takashima, Michio
• Primary Examiner(s): Le; David D.
• Application Number:
  US10/505,010
• Publication Number:
  US 20050164818A1
• Time in Patent Office: 1,729 Days
• Field of Search: 475/47, 475/48, 475/50, 475/52, 475/53, 475/59
• US Class Current: 475/59
• CPC Class Codes: F16D 33/14 consisting of shiftable or adjustable scoops
• CPC Class Codes: F16H 2037/0866 Power split variators with distributing differentials, with the output of the CVT connected or connectable to the output shaft
• CPC Class Codes: F16H 2037/088 Power split variators with summing differentials, with the input of the CVT connected or connectable to the input shaft
• CPC Class Codes: F16H 3/72 with a secondary drive, e.g. regulating motor, in order to vary speed continuously
• CPC Class Codes: F16H 47/085 with at least two mechanical connections between the hydraulic device and the mechanical transmissions

Abstract

The present invention relates to a transmission apparatus (15) including at least one of a dividing unit (6) and a differential planetary gear unit (30), and a joint unit (20). A rotational power, which has been input to the transmission apparatus (15), is transmitted to the joint unit (20) via the dividing unit (6) or the differential planetary gear unit (30). A rotational power to be input to the joint unit (20) is smaller than the rotational power which has been input to the transmission apparatus (15), and the joint unit comprises a fluid coupling.

Claims

1. A transmission apparatus comprising:

a dividing unit;

a differential planetary gear unit; and

a fluid coupling;

wherein a rotational power which has been input to said transmission apparatus is transmitted to said dividing unit via a single input shaft and is output to two rotating shafts;

wherein one of said two rotating shafts is coupled to one of two input shafts of said differential planetary gear unit;

wherein the other of said two rotating shafts is coupled to the other of said two input shafts of said differential planetary gear unit via said fluid coupling;

wherein one of two rotational powers that have been output to said two rotating shafts is transmitted via said fluid coupling, and is smaller than the other of the two rotational powers;

wherein the rotational power transmitted via said fluid coupling is smaller than the rotational power which has been input to said transmission apparatus; and

wherein said fluid coupling has a scoop tube disposed either at a power input side or at a power output side of said fluid coupling.

2. A transmission apparatus according to claim 1, wherein a gear unit having a speed-increasing gear and a speed-decreasing gear is provided on at least one of the two input shafts and an output shaft of said differential planetary gear unit.

3. A transmission apparatus according to claim 1, wherein said fluid coupling is directly coupled to said dividing unit and said differential planetary gear unit.