Motor vehicles – Steering by driving – Auxiliary steering motor
Patent
1981-03-12
1983-07-19
Pekar, John A.
Motor vehicles
Steering by driving
Auxiliary steering motor
B62D 1118
Patent
active
043939520
DESCRIPTION:
BRIEF SUMMARY
In the state of the art there are described a large number of steering gear arrangements for track-laying vehicles.
Purely mechanical solutions, by means of which the different track-laying velocities are effected, such as by means of frictional contacting members, brakes and/or couplings, are already known. Also adjustable drives, in the form of chain drives, frictional drives or cone belt drives, are known. These known drives are frequently accompanied with a poor weight-horsepower ratio, which limits the available constructional volume for the transferred power.
More modern solutions prefer recent hydrostatic drives. These have, with small constructional sizes, frequently relatively poor efficiency and when a large power is to be transmitted there occur thermal as well as constructional problems. In a known drive of this type a zero shaft acts on a planetary drive arranged in front of the chain wheels, whereby the zero shaft can be driven by the drive motor either purely mehanically but also in a known manner by means of a hydrostatic drive, whereby a control member drivingly connects, in dependency with the size of the selected turning circle diameter, the mechanical or hydrostatic drive with the zero shaft. The construction of this steering drive arrangement is complex, without furnishing any additional advantages over the other superposed connecting drive arrangements.
The invention resolves this task, by expanding the application range of such steering drives and by providing additional advantages, as for example improving the adjustability of the travel velocity. The invention indicates a solution in which the possibilities of modern technology are advantageously combined, whereby by branching the drive power a good total effect and efficiency is obtained and the velocity range of the track laying vehicle can be very large.
The invention therefore resides in a gear arrangement for track-laying vehicles, consisting of an internal combustion motor with torque converter and drive shaft, universal-joint shaft as well as a steering gear, consisting of two planetary drives, whereby each branch of the drive is connected to the internal combustion motor by means of the drive shafts as well as each branch of the planetary drive represents a secondary drive, onto which a third remaining branch of the steering drive provides the steering by means of a hydrostatic drive which is driven by the motor and is thereby characterized, that for each track-laying side there is provided a hydrostatic drive which is driven by the internal combustion engine and is directly connected with the third branch of the gear drive. It is however known, to equip each track-drive transmission with a hydrostatic drive; however, these tracks are not driven by the motor but represent a branch in the drive connection between the planetary drive (gear) and the track. With this there is only, however, employed a single track, the function of which can be accomplished by other known steering drives, to wit a rotation of the vehicle on one track about its vertical axis to steer it.
It has been found surprising, that by means of the inventor's driving of the hydrostatic gear drive arrangement directly by means of the motor and its direct connection to the third branch of the planetary gear drive the following advantages are achieved:
With an adjusted switching stage of the transportation drive (drive gear) there is achieved an additional increase or reduction of the travel velocity;
turning in place, that is on one track,
reduction of the wear of the hydrostatic drive when straight starting by means of zero demand,
arresting (non-operation) of the mechanical drive of the planetary gear and travelling and steering only by means of the hydrostatic drive (gear).
The sole FIGURE of the drawing is a largely schematic representation of the instant invention.
An internal combustion engine 1 serves as the power source. To its rear there is connected an automatic transmission, consisting of a torque converter 2 and a gear transmission 3 which is secu
REFERENCES:
patent: 1984830 (1934-12-01), Higley
patent: 2336911 (1943-12-01), Zimmermann
patent: 2336912 (1943-12-01), Zimmermann
patent: 2730182 (1956-01-01), Sloane
patent: 2874591 (1959-02-01), Thoma
patent: 3081647 (1963-03-01), Blenke
patent: 3199376 (1965-08-01), De Lalio
patent: 3373636 (1968-03-01), Livezey et al.
patent: 3383953 (1968-05-01), Christenson
Bombardier-Rotax Gesellschaft mbH.
Pekar John A.
LandOfFree
Steering gear for a track-laying vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Steering gear for a track-laying vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steering gear for a track-laying vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-747566