Adjustable hydromechanical transmission for vehicle

 

The invention relates to transport machinery and can be used as a continuously variable transmission of a vehicle. Adjustable hydro-mechanical transmission includes an input 1 and output shafts 9 for connection with the engine 11 and the propulsion vehicle 10 connected between a hydraulic pump 2 and the hydraulic motor 7, and the differential mechanism. On the shaft 1 set rotor reversible adjustable hydraulic pump 2. On the rotor unregulated reversible motor 7, located on the intermediate shaft 3, is rigidly fixed crown wheel 6 of the differential mechanism. Gear ratio between the sun wheel 4 of the differential mechanism and the rotor of the hydraulic pump 2 is equal to unity. Technical result - providing a wide range of speeds of rotation of the output shaft, including a change of the direction of rotation. 1 C.p. f-crystals, 2 Il.

The invention relates to transport machinery and can be used as a transmission vehicle.

Known hydromechanical transmission includes two hydraulic machines, hydraulically interconnected, one of which, for example, PE is connected with the drive shaft, the output link rigidly connected with the driven shaft and kinematically with one of the hydraulic machines, intermediate differential mechanism kinematically associated with the second hydraulic machines, two-position switching device, kinematically linking the first hydraulic machines with the intermediate link, and the second output link in one of the positions and the first hydraulic machines with an output link, and the second hydraulic machines - with an intermediate second position.with. No. 1435874, F 16 N 47/04, publ. BI No. 41 of 07.11.1988,) - [1].

The disadvantage of this design is the presence of a bistable switching device, resulting in power loss at the switching moment.

Known adjustable hydraulic transmission for a vehicle transmission, selected for comparative analysis with the proposed technical solution (and.with. No. 1585595, F 16 N 61/40, 60 To 17/10, publ. BI No. 41 of 07.11.1988,) - [2]. Adjustable hydraulic transmission includes input and output shafts connected respectively to the engine and the propulsion of the vehicle. It includes a primary hydraulic machines, which is the defining element of the speed of the intermediate link connecting the input and output shafts of the differential mechanism, additional hydroma eusto consists of a casing with inlet connected to the discharge line of the main hydraulic machines, and the outlet connected with the tank, a cylindrical sleeve with ends installed in the sleeve shaft connected with the handle, and spring.

The desired sub-range speed control of the vehicle is set by the distributor, when this happens, or the corresponding connecting the discharge line of the main hydraulic machines to additional hydraulic machines, or disconnecting. The speed control in the selected sub-range is regulating device by handle rotation and deformation of the spring, increasing or decreasing the flow of fluid from line to tank. With the change in the flow rate of the line in the tank changes the speed of rotation of the main hydraulic machines and associated intermediate differential mechanism, i.e. the speed of the vehicle. In case of change of the load on the propulsion of the vehicle in a corresponding change in pressure occurs in the injection line of the main hydraulic machines. This leads to a partial deformation of the spring, with a corresponding change in the flow rate that compensates for the change in the value of leakage from change the tailor's tools.

The invention solves the problem of creating a variable hydromechanical transmission with a wide range of speeds of rotation of the output link, including changing the direction of rotation, for use as a continuously variable transmission of a vehicle.

This object is achieved in that variable hydromechanical transmission for a vehicle containing an input shaft for connection with the engine and an output shaft for connection with the propulsion of the vehicle, hydraulic machines, hydraulically interconnected, the differential mechanism input shaft planted rotor reversible adjustable hydraulic pump, and the rotor unregulated reversing of the motor coaxially located on the intermediate shaft, rigidly fixed crown wheel differential mechanism, the gear ratio between the sun wheel of which the rotor is reversible adjustable hydraulic pump is equal to the unit, and the gear ratio of the differential mechanism is equal to the ratio of the first transmission of the vehicle, providing a range of gear ratios hydromechanical transmission from the rear of the vehicle before it prestamo, to the suction branch which is permanently connected to the compensator leakage through the check valve and the spool, kinematically connected with the regulator reversible adjustable hydraulic pump.

To obtain the gear ratio between the sun wheel of the differential mechanism and the rotor reversible adjustable hydraulic pump, equal to one on the input and intermediate shafts rigidly mounted gears, gear ratio which is equal to one.

The invention is illustrated in Fig.1, 2, which presents options for implementing a variable hydromechanical transmission for the vehicle.

Here: 1 - input shaft; 2 - reverse adjustable hydraulic pump; 3 - intermediate shaft; 4 - the sun-wheel differential mechanism; 5 - pinion differential mechanism; 6 - crown wheel differential mechanism; 7 - reversible unregulated hydraulic motor; 8 - drove differential mechanism; 9 - output shaft; 10 - propulsion of the vehicle; 11 - engine; 12 - valve; 13 - tank; 14 - compensator leakage; 15 - return valve; 16, 17 - gears.

On the input shaft 1 variable hydromechanical transmission fixed rotor reversible adjustable g is fixed sun wheel 4 of the differential mechanism, including satellites 5, drove 8 and the crown wheel 6, is rigidly fixed to the rotor unregulated reversible motor 7, coaxially located on the intermediate shaft 3. Suction and delivery pump through the valve 12 is connected to the set 13. Suction and delivery line can be combined in a closed hydraulic system, to the suction branch which is permanently connected to the compensator leakage 14 through the check valve 15 and the valve 12, kinematically connected with the regulator reversible adjustable hydraulic pump 2 (not shown). Input shaft 1 is a shaft for connection with the engine 11 of the vehicle, and the output shaft 9 is connected with a differential gear with the propeller 10 of the vehicle. Gears 16 and 17 have a ratio equal to one, and the gear ratio of the differential mechanism is equal to the ratio of the first transmission of the vehicle.

Hydromechanical transmission works as follows.

Neutral (zero) position regulator reversible adjustable hydraulic pump 2 corresponds to a stationary position of the rotor reversible unregulated motor 7, the crown wheel 6 the door is that one way leads to an increase in the supply of the hydraulic pump 2 and the rotation of the rotor of the motor 7, crown wheel 6 in the same direction as the intermediate shaft 3 with a sun wheel 4. This, in turn, leads to an increase in the speed of rotation of the output shaft 9.

When the deviation of the control hydraulic pump 2 in the other direction relative to the zero position using kinematically associated with the regulator valve 12 are swapped suction and delivery line and, as a consequence, changes the direction of rotation of the rotor of the motor 7 and the crown wheel 6 of the differential mechanism. When the flow of the hydraulic pump 2 reaches the value, providing the ratio of angular speeds of the sun gear 4 and the crown-wheel 6, is equal to the inverse ratio of the numbers of teeth of these wheels, this will correspond to a stationary condition of the vehicle - “neytralke. Further, the deviation of the regulator and increase the feed rate of the hydraulic pump 2 in the same direction will go to the back of the vehicle.

Accordingly, the adjustable hydromechanical transmission for a vehicle is realizable as a continuously variable transmission provides a wide range of speeds of rotation of the output shaft, including a change of direction of rotation, when the s in different areas of technology.

Claims

1. Adjustable hydromechanical transmission for a vehicle, containing the input and output shafts for connection with the engine and the propulsion of the vehicle, respectively, hydraulic machines, hydraulically interconnected, and the differential mechanism, characterized in that the input shaft fixed to the rotor reversible adjustable hydraulic pump, intermediate shaft fixed sun wheel of the differential mechanism, the rotor unregulated reversing of the motor coaxially located on the intermediate shaft, rigidly fixed crown wheel differential mechanism, and the gear ratio between the sun wheel of the differential mechanism and the rotor reversible adjustable hydraulic pump is equal to one.

2. Adjustable hydromechanical transmission for vehicles under item 1, characterized in that the suction and delivery line form a closed hydraulic system, to the suction branch which is permanently connected to the compensator leakage through the check valve and the spool, kinematically connected with the regulator reversible adjustable hydraulic pump.

 

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