US 5,438,831 A · Axle driving apparatus

Abstract

A pair of axles and a hydrostatic transmission which drives them are housed in a common housing. The hydrostatic transmission comprises a hydraulic pump, with a movable swash plate, which drives a hydraulic motor with pressurized oil. Adjusting the angle and direction of slant of the movable swash plate controls the volume and direction of flow of the pressurized oil. The angle and direction of slant of the movable swash plate are controlled by a rotating member and a shaft housed within the common housing. The rotating member has a contact portion which abuts against an abutting member when transmission is operating in reverse. When the abutting member abuts against the contact portion, a detector operates a switching unit, allowing an alarm to be sounded or the operating device of the vehicle to be disengaged automatically when the vehicle is running in reverse.

Claims29

Dependent claims

An axle driving apparatus comprising:

a housing;
a hydrostatic transmission disposed within said housing, including a variable displacement type hydraulic apparatus, and a movable swash plate having a variable direction of slant, whereby the movement of said movable swash plate controls the discharge direction of oil in said hydrostatic transmission and the volume of flow of oil in said hydrostatic transmission;
an operating mechanism disposed within said housing for controlling the movement of said movable swash plate;
a detection means for detecting when said operating mechanism moves said movable swash plate from a first slanting position to a second slanting position;
and
a switching unit operated by said detection means only when said detection means detects movement of said moveable swash plate to said the second slanting position.

3 more elements

Dependencies are inferred from the claim text.

Axle driving apparatus

Life of this patent

Axle driving apparatus

Life of this patent

Abstract

Claims29