Power plants – Pressure fluid source and motor
Patent
1986-05-22
1988-05-24
Look, Edward K.
Power plants
Pressure fluid source and motor
60454, 417360, F16D 3100
Patent
active
047457430
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to assemblies for supplying a source of pressurised hydraulic fluid to operate a wide range of functions on an agricultural or industrial tractor or similar vehicle.
Conventionally such supply assemblies comprise a number of components, including a pump and a fluid filter, which are separately supported on the vehicle and are connected to each other by hydraulic piping.
Such arrangements suffer from a number of disadvantages such as being costly in terms of installation time, being particularly vulnerable to leakage and failure due to the use of long lengths of piping, and being difficult to service since any components of the assembly which are housed internally within the vehicle are not readily accessible. This latter difficulty often, in the case of tractors, necessitating actual disassembly of the tractor chassis to give access to the internally housed components.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide an improved form of hydraulic fluid supply assembly which mitigates at least some of the above described difficulties.
Thus according to the present invention there is provided a hydraulic fluid supply assembly for an agricultural or industrial tractor or similar vehicle, the assembly comprising: acts as a reservoir for hydraulic fluid, and the pump feed means,
Conveniently, when the invention is applied to an agricultural or industrial tractor, the hydraulic fluid supply assembly closes an aperture in a transmission casing or back axle casing of the tractor and the pump takes its supply of fluid from the fluid within the transmission or back axle.
In a preferred arrangement the mounting plate carries one or more hydraulic valves or other hydraulic consumers which are to receive fluid flow from the pump, the valves or other consumers may have supply passages formed integrally in the mounting plate.
The mounting plate may carry more than one pump, the pumps using the same pump feed means and filter means and supplying different consumers.
The mounting plate preferably also carries a gear wheel or other pump drive means which engages with the vehicle drive train to provide drive to the pump or pumps when the mounting plate is secured in position over the casing aperture.
The mounting plate may include a hydraulic connection for the return of fluid from one or more consumers to the pump or pumps without passage through the pump feed means and filter means.
The mounting plate may include one or more hydraulic test points which communicate with internal passages within the plate so that the hydraulic pressure at various locations in hydraulic circuits associated with the assembly can be checked.
Preferably the filter means comprises a filter which is mounted on a filter head formed integrally in the mounting plate.
The invention also provides a hydraulic filter installation for an agricultural or industrial tractor in which the filter is directly attached to a filter head formed integrally in a transmission or back axle casing of the tractor which casing acts as a reservoir for hydraulic fluid .
DESCRIPTION OF THE DRAWINGS
One embodiment of the present invention as applied to an agricultural tractor fluid supply system will now be described, by way of example only, with reference to the accompanying drawings in which:
FIG. 1 is a diagrammatic representation of a fluid supply system embodying the present invention mounted on a tractor back axle casing;
FIG. 2 is a diagram of the hydraulic system of the tractor shown in FIG. 1 of which the supply system of the present invention forms part;
FIG. 3 is an end view of the supply system of FIG. 1 on a larger scale;
FIG. 4 is a view in the direction of arrow A of FIG. 3;
FIG. 5 is a view in the direction of arrow B of FIG. 3;
FIG. 6 is a view in the direction of arrow B showing a trailer braking valve option;
FIG. 7 is section on line C--C of FIG. 4;
FIG. 8 is a section on line F--F of FIG. 5;
FIG. 9 is a section on line H--H of FIG. 5;
FIG. 10 is a section on line G--G of FIG. 5
REFERENCES:
patent: 2799139 (1957-07-01), Becker
patent: 4043127 (1977-08-01), Kubik
patent: 4255091 (1981-03-01), Dike, Jr.
patent: 4290446 (1981-09-01), Seiler
patent: 4348864 (1982-09-01), Ichimura et al.
Look Edward K.
Massey-Ferguson Services N.V
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