DE1734082U - CONTINUOUSLY CONTROLLED DRIVE, IN PARTICULAR FOR AGRICULTURAL MOTOR VEHICLES. - Google Patents

Description

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pump can be kept small according to their dimensions can"

The innovation also provides that the liquid pump of the infinitely variable drive by means of a bin and disengagement clutch that is expediently built into its drive shaft. and can be switched off · This has the advantage that the liquid pump only needs to run in the ferry service * In addition, can this clutch may also be designed as a starting clutch *

Details of the inflation can be seen from the drawing, which reproduces an exemplary embodiment of the subject of the innovation in a schematic representation.

In the exemplary embodiment, the new transmission is in an agricultural one Usable tractor installed, the motor 1 of which drives a shaft 2 directly or indirectly, on which a heat! 3 This pinion meshes with a spur gear 4 which is connected to a differential housing 5 in a rotationally fixed manner. The housing 5 in turn rests loosely on the two shafts 6 and 7 · Its rotary movements are controlled by the bevel gears 8 and 9 as well 10 and 11 are transferred to the shafts 6 and 7, namely the wheel 10 sets the shaft 6 and the wheel 11 the output shaft 7 in rotation, which latter is connected to the final drive 13 of the vehicle via the vehicle differential 12.

On the shaft 6 is a hydraulic fluid pump 14, for example a wheel pump is arranged, which can be short-circuited by a line 15. For this purpose, line 15 is a Switching element 16, for example a two-way cock, to which a pressure line 18 leading to the pressure fluid motor 17 connected. The motor 17, which is infinitely variable, can be arranged directly on the output shaft 7 of the differential gear, or, for example, by means of a reduction gear 19 and 20 are in driving connection with this wave. A return line 21 runs from the motor 17 to the short-circuit line 15 of the pump 14

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The mode of operation of the continuously variable drive is as follows

When the engine 1 is idling, the switching element 16 is set so that that the circuit of the pump 14 is short-circuited. The torque of the engine 1 is transferred to the differential gear via the drive wheel 3 4 to 11 and is distributed between the two barks. 6 and 7 · Through the acting on the vehicle final drive 13 Resistance occurs in the corner 7 and in the wheel 11 a supporting moment on, whereby the shaft 6 drives the liquid pump 14 «The amount of liquid required by pump 14, sv / angular oil, flows in the short-circuit line 15 without work, i.e. « the pump 14 runs idle while the vehicle is still idle stands"

To start up, the switching element 16 is set so that the pressure fluid flows through the line 18 into the fluid motor 6 occurring torque greater · This also changes the torque delivered by the pressure fluid motor 17 via Clqxi drives 19, 20 to the heads 7, so that in cooperation with the torque delivered by the motor 1 to the shaft 7, the vehicle starts off to the same extent As the shaft 6 is stressed or its speed decreases with increasing pump output, the speed of the output shaft 7 increases automatically under the influence of the differential effect of the differential gear 4 to 11, until the total torque in the output shaft when the Hades 10 is braked heavily or at a standstill 7 is directed. Since the speed of the output shaft 7 is dependent on the power output of the motor 17, the driving speed on the motor 17 can be regulated continuously.

To prevent the pump 14 from running even when the vehicle is stationary for a long time with the engine running, like that This is often the case with agriculturally usable motor vehicles, the pump 14 is driven by a drive shaft 6 built-in engagement and disengagement clutch 22 can be switched off · Is formed

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the clutch 22 as a slip clutch, so it is possible through Activate the same to start and stop the vehicle. When using such a coupling 22 could you waive the rest of the short-circuit line of the pump 14, and it would be a closed line 13 between pump 14 and Liquid motor 17 suffice · Bio coupling 22 can be essential be made smaller than the usual motor clutches, since they only transmit part of the lotordorque has · If the vehicle is only to be brought to a standstill with the aid of the pump coupling, a simple claw coupling would be used suffice.

£ ■

The invention is based on the illustrated and described embodiment not restricted, but also encompasses further execution and arrangement possibilities. So kaan as a liquid pump E.g. a piston piston can also be used * It is also possible to use the pump 14 or instead of the liquid motor 17 to regulate both steplessly in a sensible way in order to achieve a braking effect on the shaft, which is implemented in work and on the output shaft 7 is beneficially applied- «Furthermore, lets Instead of the liquid motor 17, another suitable one Aggregate, for example an electrical transmission use the braking power as work on the output shaft. In addition, the size of the pump is determined and the unit 17 which receives the pressure fluid and starts working, according to which speed range of the vehicle is to be regulated continuously, i.e. the lower the driving speeds to be controlled, the lower the power to be transmitted by these units

Protection claims - 5 -

Claims (1)

PA519 «4 * 20.9.56 - 5 claims 1 »Infinitely variable drive, especially for agricultural Motor vehicles »with a differential gear connected between the drive shaft and the output shaft» that through a fluid pump coupled with its rotating shaft and one with its output shaft in active connection stationary liquid motor which can be acted upon by the pump controllable 1st »whereby sur balancing of the work performance the liquid pump on the amount of oil fed into the pump influencing adjusting member, also one the oil supply and -return line connecting short-circuit line with built-in Umsehaltorgan is provided, characterized in that » that as differential gear a differential drive (3 to 10) serves » 2 «Drive according to claim 1» characterized by such Formation of the differential drive »that the torque of the Motor (1) unequal to the two? / Ellen (6 and 7) of the differential drive is distributed »with the output shaft (7) transmitting the greater part · 3. Drive according to claim 1 and 2, characterized in that »that his liquid pump by means of a lin- and disengaging clutch (22) that is expediently built into your drive shaft (€) can be switched on and off »;