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Axle driving apparatus

a driving apparatus and axle technology, applied in the direction of fluid couplings, positive displacement liquid engines, couplings, etc., can solve the problem that the sliding resistance cannot be diminished, and achieve the effect of reducing the sliding resistance, reducing the necessary operating force, and reducing processing costs

Inactive Publication Date: 2001-02-13
KANZAKI KOKYUKOKI MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

In accordance with the invention, an axle driving apparatus houses in a common housing a hydrostatic transmission and axles driven by the hydrostatic transmission. One of the pair of displacement type hydraulic systems comprising the hydrostatic transmission is of variable-capacitive type having a movable swash plate, which is operable, for example, manually operable to move the swash plate to slanted positions. A primary object of the invention is to provide legs for supporting the movable swash plate inside the housing, so that the movable swash plate is suspended in the housing. Thus, the sliding resistance is reduced when the movable swash plate is slantingly moved. Accordingly, the necessary operating force is reduced and the movable swash plate can easily return to the neutral position. Another object of the invention is to reduce processing costs and simplify construction of the movable swash plate in the housing.

Problems solved by technology

Especially problematic is the case where the movable swash plate is spring biased to automatically return to a neutral position when an operation is stopped.
Further, the sliding resistance cannot be diminished merely by polishing the rear surface of movable swash plate, which contacts the thrust metal.

Method used

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Embodiment Construction

FIGS. 1, 2, 3, 4 and 5 illustrate an axle driving apparatus. A housing of the axle driving apparatus is constructed by joining first and second halves, for example, an upper half 1 of the housing and a lower half 2 of the housing at joining surfaces, for example, horizontal joining surfaces to form a joint, respectively. An oil sump is formed in the housing. Positioned in the joint of upper half 1 and lower half 2 are axles including an output shaft 4 and a counter shaft 26, and bearings for receiving the output shaft 4 and the counter shaft 26. A pair of axles 7 are rotatably supported inside upper half 1 of the housing and apart from, for example, above the joint of upper half 1 and lower half 2 of the housing. The pair of axles 7 are differently connected by a differential gear 23 in the housing and extend outwardly from the housing.

A projection, for example, an upward projection is formed at a portion of the upper half 1 of the housing in which differential gear 23 is disposed. ...

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PUM

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Abstract

An axle driving apparatus has in a housing a hydrostatic transmission with a variable displacement type hydraulic system having a slantingly movable swash plate. In one embodiment, the movable swash plate is manually slantingly operable. A leg member integrally extends from an inner wall of the housing, a lid for closing an opening of the housing, or a center section. The leg member has a support portion for supporting a shaft provided on an axis of rotation of the movable swash plate. Accordingly, the movable swash plate is suspended in the housing for slanting or pivoting movement.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to an axle driving apparatus for driving a vehicle, and more particularly, the invention relates to a pair of displacement hydraulic systems where at least one of the systems is of a variable capacity type having a movable swash plate.2. Description of Related ArtU.S. Pat. Nos. 4,914,907, 4,903,545, 5,156,576 and 5,201,692 disclose a type of axle driving apparatus, which houses in a common housing a hydrostatic transmission including a pair of displacement type hydraulic systems fluidly connected with each other and axles driven by the hydrostatic transmission. At least one of the displacement type hydraulic systems is of a variable displacement type having a movable swash plate in contact with heads of pistons fitted into a cylinder block. The pistons reciprocate and the movable swash plate slants with respect to the rotary axis of the cylinder block.This type of movable swash plate is convex at a rea...

Claims

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Application Information

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IPC IPC(8): B60K17/10F04B1/12F04B1/32F04B1/20
CPCB60K17/105F04B1/324
Inventor ISHII, NORIHIRONAGAI, TOSHIOHARADA, HIDEMIOKADA, HIDEAKI
Owner KANZAKI KOKYUKOKI MFG