DE2521331A1 - TRANSMISSION FOR FULL-CHAIN VEHICLES - Google Patents

Description

The invention relates to a transmission for full-track vehicles, consisting from a hydrodynamic-mechanical reversing gear, one Flow brake, a controllable hydrodynamic or hydrostatic cooling fan drive and a continuously controllable superimposed steering gear, whereby the hydrodynamic torque converter is coaxial with the engine crankshaft and the reversing gearbox with flow brake is transverse to the drive shaft, are arranged coaxially or axially parallel to the two output shafts with the associated steering totaling differentials and the zero shaft.

Infinitely controllable superimposed steering gears are available in different designs, especially as hydrostatic or hydrostatic-hydro-

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dynamic or hydrostatic-mechanical drive systems known (DT-AS 1 480 725), so that with regard to the function and mode of action of the individual Components can be referred to this prior art. In the known transmissions, however, there are considerable difficulties due to the complicated Arrangement of the individual gear elements and an elaborate Construction, especially of the gears, shafts and bearings.

The invention is therefore based on the object by means of a new arrangement of the essential transmission elements to a considerable simplification of the transmission with the resulting imputed and structural advantages reach. In particular, the invention seeks to provide a spatial arrangement of the main transmission assemblies in a common one-piece transmission housing for a gearbox with two gearbox output shafts lying transversely to the drive shaft and a hydrodynamic torque converter directly coupled to the engine realize that allows the main transmission assemblies to be designed as functional, pre-testable and interchangeable units, The expenditure on gears and shafts necessary for the drive connection of the individual structural units is as low as possible and the exchange of the individual structural units on the overall transmission as directly as possible and without prior Other assemblies can be dismantled.

The essence of the invention is based on the transmission mentioned at the beginning in that the superposition steering gear horizontally left and / or right in addition to the torque converter with axes parallel to the reversing gearbox

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and the fan drive are arranged perpendicular thereto, with the drive the steering gear and the cooling fan serving gears in a common, with the primary part of the torque converter rotatably connected gear, z. Bevel gear, engage.

From previously known transmissions of the type mentioned above, the

not

or only to a limited extent. Multi-part housings are often used; also, the individual gear assemblies are largely not designed as functional units in themselves and only accessible after major dismantling. By the arrangement according to the invention the main assemblies of the superimposed steering drive horizontally left and / or to the right of the torque converter with axes parallel to the manual transmission and the fan drive group that is perpendicular to it, these assemblies can be designed as functional, pre-testable and interchangeable structural units and laterally or from above in the common main transmission housing can be installed or removed from the housing without the other assemblies, z. B. Torque converter, reversing gearbox, flow brake / must be dismantled.

In the same way, the arrangement of the transmission assemblies according to the invention allows the assembly and disassembly or replacement of the torque converter assemblies, Shift reversing gear and fluid brake as well as the control groups without Dismantling of the steering and fan drive assemblies.

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There is also only one drive connection between the individual drive groups Minimum effort required in that the gears used to drive the steering gear and the cooling fan according to the invention are in one common with the primary converter side non-rotatably connected gear, z. B. bevel gear engage. In connection with the assembly arrangement according to the invention, it is advantageous to form a hydrostatic and a hydrodynamic or mechanical or a combined interchangeable slide-in unit that is functional in itself.

In the design of the hydrostatic assembly, it turns out to be It is advisable to use a new type of construction in such a way that the oil pump and oil motor are arranged above or next to one another in a common housing and the oil-carrying connection catiles between pump and motor and the necessary feed, flushing and pressure relief valves in or on a common one

frontal plate, which is arranged opposite the inlet and outlet shaft, are summarized. Compared to known designs, a hydrostatic unit of this new type requires a minimum of installation space and adds fits in ideally with the building system described above.

The well-known hydrodynamic or mechanical drive system of the Steering gear (see FIG. DAS 1 480 725) is according to the invention also in one Arranged own housing and designed as an exchangeable slide-in unit.

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In special cases it can be advantageous to use the hydrostatic and hydrodynamic or combine mechanical drive part into a common combined slide-in unit.

Depending on the required steering performance, you can then left and / or right next to the torque converter a hydrostatic and a hydrodynamic or mechanical or a combined slide-in unit can be arranged, its drive with the converter primary side and its output with the zero shaft, advantageously are non-rotatably connected via plug connections.

The design of the cooling fan drive with a vertically arranged drive shaft advantageously takes place in such a way that the hydrodynamic or hydrostatic control element (ζ. B. hydrodynamic control clutch or hydrostatic) designed as a unit, can be inserted from above, is arranged within the main gear housing and the transfer case, if for example several fan wheels are to be operated, should be placed on top of the main housing. This type of execution allows a good Adaptability of the drive to the requirements of the cooling system (e.g. changed position of the fan wheels) without changes to the main gearbox required are.

The proposed gear arrangement using functional per se Interchangeable assembly units ensure maximum accessibility with a minimum of required installation space and drive wheels

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for maintenance, replacement and servicing of the individual assemblies. Except The use of such units offers these advantages the possibility of using the same units for similar transmissions in other performance classes or to use it elsewhere.

Details of the invention are shown schematically and by way of example in the drawing. Show it:

Fig. 1: a transmission for full-track vehicles with the converter on both sides arranged steering gears,

Fig. 2: a section along the line A-B through the transmission according to Fig. 1,

Fig. 3: a variant of the transmission according to Fig. 1 and Fig. 4: a hydrostatic transmission unit.

In Figs. 1 and 2, the individual gear elements are shown schematically, namely the one-piece main housing 1 with the mounting openings 2, 3, 4, 5, 6 and 7, the one on the drive side, with the engine crankshaft

connected torque converter 9, which are arranged to the left and right of the torque converter, with axes parallel to the shift-reversing transmission 10

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Assemblies of the steering gear, namely the hydrostatic unit 11 and the hydrodynamic or mechanical steering drive unit 12, both of which with the Zero shaft 13 on the output side via the gears 14, 15 and 16, 17 driven are connected, the vertically arranged release drive 18 with external transfer case 19, the gear wheels 20, 21 and 22 serving to drive the steering gear and fan drive, which are in the common with the Primary part of the torque converter 9 engage gear 23 connected and about Plug connections 24, 25, 26 with the structural units 11, 12 and 18 are drivingly connected. To complete the picture, the flow brake 27, the two steering differentials 28, 29 with the gear wheels 30, 31 belonging to the steering drive, and the connecting shaft 32 of the torque converter are also provided to the reversing gear shown.

Fig. 3 shows schematically and for example another type of application of the According to the invention, namely a hydrostatic unit 11 * arranged on one side of the torque converter 9 'and a hydrodynamic or mechanical drive unit 12 *. These two structural units can, depending on the performance requirements, be arranged to the left and / or right of the torque converter be. In the same way, it is possible to have a combined hydrostatic-hydrodynamic or hydrostatic-mechanical slide-in unit 33, 33 'on the left and / or to be arranged to the right of the torque converter «

In Fig. 4, the inventive construction of the hydrostatic unit 11 (cf.

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Fig. L) shown, namely in a common surrounding housing 40 above or next to each other arranged assemblies variable pump 41 and Oil motor 42, drive shaft 43, output shaft 44 and the end face Plate 45 in which the connecting oil channels 46 and the feed, flushing and pressure relief valves 47, 48 and 49 are accommodated.

Claims;

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Claims (7)

PATENT CLAIMS 1.) Transmission for full-track vehicles, consisting of a hydrodynamic mechanical reversing gear, a flow brake, a controllable hydrodynamic or hydrostatic cooling fan drive and a continuously controllable superimposed steering gear, whereby the hydrodynamic torque converter is coaxial with the engine crankshaft and the reversing gear with flow brake transversely to the drive shaft, coaxial or are arranged axially parallel to the two output shafts with the associated Lenksumraierungsdifferentialen and the zero shaft, thereby characterized that the overlay steering drives (11,12) horizontally to the left and / or right of the torque converter (9) with axes parallel to the reversing gearbox and the Gehläs drive (18) are arranged perpendicular to it, which is used to drive the Lenkgetdebes and the cooling fan serving gears (20, 21, 22) in a common, 609848/0404 rotatably connected to the primary part of the torque converter (9) Gear, ζ. Β. Bevel gear (23), engage. 2.) Transmission according to claim 1, characterized in that that the main assemblies (11, 12) of the steering drive are designed as functional, pre-testable and interchangeable units which can be inserted laterally into the common main housing and are drivingly connected to the neutral shaft (13) on the output side. 3.) Transmission according to claim 1 or 2, characterized in that that the one slide-in unit (ii) is a hydrostatic drive and the the other, second slide-in unit (12) is a hydrodynamic or mechanical drive. 4.) Transmission according to claim 1 or 2, characterized in that a hydrostatic and a hydrodynamic or mechanical Bnschubeinheit (II ¹ , 12 ') are arranged on the left and / or right of the torque converter. 5.) Transmission according to claim 4, characterized in that in each case a hydrostatic and a hydrodynamic or mechanical drive are combined to form a slide-in unit (33, 33 ') and are arranged on the left and / or right of the torque converter. 609848 / 0AOA 6.) Transmission according to claim 3 or 4, characterized in that that oil pump and oil motor of the hydrostatic slide-in unit in one Geroeinsamen housing arranged one above the other or next to one another and the oil ducts as well as feed, spill and pressure relief valves in or on one common end-face plate opposite to the an and Abtdebswelle are combined. 7.) Transmission according to claim 1 or one of the following, characterized in that g e k e η η shows that the drive and control element (18) for the fan drive is designed as a functional, testable and replaceable structural unit that is functional in itself and is inserted vertically from above into the main housing can be pushed in and the distributor drive for the fan wheels can be inserted outside the main housing and the distributor drive for the blower veins is arranged outside the main housing on the top thereof. Dipl.-Ing.H.-D.Ernicke patent attorney • «■ Eraldk * 609848/0404