Combine

Patent metadata

Field	Value
Publication number	US-9845857-B2
Application number	US-201415024157-A
Country	US
Kind code	B2
Filing date	Feb 25, 2014
Priority date	Sep 27, 2013
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

Provided is a combine with a speed-change power transmission apparatus including: a hydraulic static continuously variable transmission unit that receives an input of drive force from an engine, and subjects the drive force to speed change; and a planetary power transmission unit that combines the drive force from the engine and an output from the continuously variable transmission unit and outputs a combined drive force to a travelling apparatus, wherein a power transmission case can be made lighter at low cost. In this combine, a continuously variable transmission case portion of a power transmission case, which houses a continuously variable transmission unit, is formed integrally with a planetary power transmission case portion of the power transmission case, which houses a planetary power transmission unit. A partition that separates a continuously variable transmission compartment of the continuously variable transmission case portion and a planetary power transmission compartment of the planetary power transmission case portion from each other is provided within the power transmission case, the continuously variable transmission compartment housing the continuously variable transmission unit, and the planetary power transmission compartment housing the planetary power transmission unit.

First claim

The invention claimed is:

1. A combine that is provided with a speed-change power transmission apparatus including: a hydraulic static continuously variable transmission unit that has a hydraulic pump and a hydraulic motor, receives an input of drive force from an engine, and subjects the drive force to speed change; a planetary power transmission unit that combines the drive force from the engine and an output from the continuously variable transmission unit and outputs a combined drive force to a travelling apparatus; and a power transmission case that houses the continuously variable transmission unit and the planetary power transmission unit, wherein
a continuously variable transmission case portion of the power transmission case is formed integrally with a planetary power transmission case portion of the power transmission case, the continuously variable transmission case portion housing the continuously variable transmission unit, and the planetary power transmission case portion housing the planetary power transmission unit,
a partition that separates a continuously variable transmission compartment of the continuously variable transmission case portion and a planetary power transmission compartment of the planetary power transmission case portion from each other is provided within the power transmission case, the continuously variable transmission compartment housing the continuously variable transmission unit, and the planetary power transmission compartment housing the planetary power transmission unit, and
a port block with which a drive circuit that connects the hydraulic pump and the hydraulic motor to each other is formed is attached to an end portion of the continuously variable transmission case portion, the end portion being opposite a side to which the planetary power transmission case portion is coupled.

2. The combine according to claim 1 , wherein the planetary power transmission case portion is configured to be dividable into a first divisional planetary power transmission case portion and a second divisional planetary power transmission case portion, the first divisional planetary power transmission case portion being formed integrally with the continuously variable transmission case portion and being provided with the partition, and the second divisional planetary power transmission case portion being located opposite the continuously variable transmission case portion with respect to the first divisional planetary power transmission case portion.

3. The combine according to claim 1 , wherein
the power transmission case is formed such that the continuously variable transmission case portion and the planetary power transmission case portion are arranged along a lateral direction of a travelling machine body,
the combine is provided with a travelling power transmission case that is coupled to a lateral side portion of the planetary power transmission case portion, that receives an input of a combined drive force from the planetary power transmission unit, and that transmits the combined drive force to the travelling apparatus, the lateral side portion being opposite a side to which the continuously variable transmission case portion is coupled,
the travelling power transmission case is disposed such that an upper end thereof is located lower than an upper end of the planetary power transmission case portion, and
the drive force from the engine is input to the planetary power transmission unit and the continuously variable transmission unit from a laterally outer side of the planetary power transmission case portion, the laterally outer side being opposite a side to which the continuously variable transmission case portion is coupled and being above the travelling power transmission case.

4. A combine that is provided with a speed-change power transmission apparatus including: a hydraulic static continuously variable transmission unit that has a hydraulic pump and a hydraulic motor, receives an input of drive force from an engine, and subjects the drive force to speed change; a planetary power transmission unit that combines the drive force from the engine and an output from the continuously variable transmission unit and outputs a combined drive force to a travelling apparatus; and a power transmission case that houses the continuously variable transmission unit and the planetary power transmission unit, wherein
a continuously variable transmission case portion of the power transmission case is formed integrally with a planetary power transmission case portion of the power transmission case, the continuously variable transmission case portion housing the continuously variable transmission unit, and the planetary power transmission case portion housing the planetary power transmission unit,
a partition that separates a continuously variable transmission compartment of the continuously variable transmission case portion and a planetary power transmission compartment of the planetary power transmission case portion from each other is provided within the power transmission case, the continuously variable transmission compartment housing the continuously variable transmission unit, and the planetary power transmission compartment housing the planetary power transmission unit,
the power transmission case is formed such that the continuously variable transmission case portion and the planetary power transmission case portion are arranged along a lateral direction of a travelling machine body, and
when seen from above the travelling machine body, the power transmission case has a shape in which an end of the continuously variable transmission case portion on a rear side of the travelling machine body is located closer to a front of the travelling machine body than an end of the planetary power transmission case portion on the rear side of the travelling machine body is.

5. The combine according to claim 4 , wherein a speed-change control valve mechanism that performs a speed change operation with the hydraulic pump is disposed within a space that is formed by providing the power transmission case with the shape in which, when seen from above the travelling machine body, the end of the continuously variable transmission case portion on the rear side of the travelling machine body is located closer to the front of the travelling machine body than the end of the planetary power transmission case portion on the rear side of the travelling machine body is.

6. The combine according to claim 4 , wherein the engine is located closer to a rear of the travelling machine body than the power transmission case is.

7. The combine according to claim 4 , wherein the drive force from the engine is input to the planetary power transmission unit and the continuously variable transmission unit from a laterally outer side of the planetary power transmission case portion, the laterally outer side being opposite a side to which the continuously variable transmission case portion is coupled.

8. A combine that is provided with a speed-change power transmission apparatus including: a hydraulic static continuously variable transmission unit that has a hydraulic pump and a hydraulic motor, receives an input of drive force from an engine, and subjects the drive force to speed change; a planetary power transmission unit that combines the drive force from the engine and an output from the continuously variable transmission unit and outputs a combined drive force to a travelling apparatus; and a power transmission case that houses the continuously variable transmission unit and the planetary power transmission unit, wherein
a continuously variable transmission case portion of the power transmission case is formed integrally with a planetary power transmission case portion of the power

Assignees

• Kubota Kk

Inventors

• Kato Yuji
• Norita Seiji
• Nishida Satoshi

Classifications

• A01F12/56

  Driving mechanisms for the threshing parts · CPC title

• A01D69/03

  fluid · CPC title

• B60K17/10

  of fluid gearing · CPC title

• A01D41/02

  Self-propelled combines · CPC title

• F16H57/021

  Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings · CPC title