Device for control of vehicle transmission

FIELD: transport mechanical engineering.

SUBSTANCE: device comprises electric means for measuring working volume of pumps and hydraulic motors and pickup (60) for measuring the speed of rotation of the shaft of the pump station. The electric circuits are provided with threshold control members (67) and (80) interconnected between pickup (6) and the electric means. Between threshold control members (67) and (80) and electric means for changing working volume of pumps (67) and (80) and hydraulic motors (13), (14), (17), and (18) of the drive of end wheels are variable resistors (77), (78), (86), and (87) that are controlled by pickups (89) and (89) of pressure difference in hydraulic circuits of the drive of the intermediate wheels and the drive of each pair of end wheels.

EFFECT: enhanced reliability and prolonged service life.

3 cl, 4 dwg

 

The technical solution relates to the field of engineering. It concerns the control of pumps and motors hydrostatic transmissions for wheeled machines.

From patent documents are known various devices control hydrostatic transmissions wheeled vehicles (security documents issued by the United States No. 4672811, NCI 60/449, No. 5184466, 5561979, NCI 60/448, EPO No. 1079153, France No. 2803889, IPC F 16 H 61/46, Japan No. 2861466, 2874339, IPC F 16 H 61/40). In particular, in patent No. 736708, IPC F 16 H 61/46 issued by the EPO, presents the device controlling displacement of the pump containing the electronic control unit, the input of which is connected to the electric circuit of the signal from the displacement sensor pedal controlling the supply of fuel to the engine from the speed sensor of the motor shaft and the sensor move the piston rod of the hydraulic cylinder changes the effective volume of the pump, and with the outputs of the electronic unit is connected to the electromagnets to move the valve element of the valve. These security documents relate to hydrostatic transmissions-wheeled vehicles with only one pump. However, in hydrostatic transmissions multiwheel vehicles engaged all-wheel drive, it is advisable to use a greater number of pumps, generators motors several hydraulic circuits, which enables the vehicle to continue in case the e faults of the units of one of the hydraulic circuits. Such hydrostatic transmission shown, for example, in patent No. 468956, IPC F 16 H 61/46, issued in Sweden.

As the closest analogue is accepted, the control unit hydrostatic transmission wheel machines, presented in the application No. 2741130, IPC F 16 H 61/42, on the grant of a patent in France for device control hydrostatic transmission four-wheel tractor with fixed motors driving the front wheels. This hydrostatic transmission includes two pump with adjustable discharge pressure of the working fluid displacement of that form with the motors separate hydraulic circuits. However, this control pressure in hydraulic circuits are essentially different, so that the service life of the units turns out differently.

Task - create a simple and reliable device control hydrostatic transmission wheeled machine with three pairs of wheels, with the drive controlled motors, pairs included in a separate hydraulic circuits supplied with working fluid separate adjustable pumps, providing the same service life of the transmission units.

The solution to this problem provided that the control device hydrostatic transmission wheel vehicle with six wheels driven by the regulated hydromotor is, associated hose forming circulating hydraulic circuits, with a pumping station consisting of three controlled pumps with motor-driven machine that contains an electric tool change displacement pumps and motors, the speed sensor shaft pumping stations, electrical circuit between the sensor and electrical means changes the effective volume of the pumps and motors, which are the threshold of regulatory elements, on / off valves for messages hose hydraulic circuits of the drive at the wheels with a hose in the hydraulic circuit of the drive medium wheels, while the threshold between regulatory elements and electrical means changes the effective volume of the pumps and motors hydraulic circuits drive extreme wheels are variable resistors controlled by sensors pressure difference in the hydraulic circuits of the medium drive wheels and drive each outer pairs of wheels.

In this control device, hydrostatic transmission, characterized by the specified set of features, provided the same load on the hydraulic power transmission through the clear and consistent regulation of their business volume and equalize the pressure in hydraulic circuits with sensors difference is aulani in hydraulic circuits of the medium drive wheels and drive each outer pairs of wheels.

To improve the runnability of the machine at weak coupling of wheels with the ground device control hydrostatic transmission equipped with a switch to connect through diodes electrical means changes the effective volume of the hydraulic motors of the drive wheels along the side of the machine from the electrical power source, and electrical means changes the effective volume of the hydraulic motors drive the outer pairs of wheels connected to a variable resistor controlled by the differential pressure sensor in the hydraulic circuits of the medium drive wheels and drive outer pairs of wheels, and electric means changes the effective volume of the hydraulic motors drive the pair of middle wheels connected to the constant resistor in parallel through additional diodes.

For convenience control hydrostatic transmission on / off valves, telling the hydraulic circuits of the drive at the wheels with a hydraulic circuit of the drive medium wheels equipped with electric controls included relay connected to the output of the threshold regulatory element located in the electric circuit between the sensor shaft speed of the pump station and electrical means changes the effective volume of the hydraulic motors.

Threshold regulatory element located in the electrical circuit is between the sensor shaft speed of the pump station and electrical means changes the effective volume of the hydraulic motors, connected to the electrical controls on-off valve has an adjustable threshold of the beginning of the transmission signal that is modified by the pedal fuel supply to the engine, with the electric circuit of the control displacement pumps between the sensor shaft speed of the pump station and the threshold regulating element are variable resistor and a switch operated by the pedal, and a resistor in parallel with said switch.

The figure 1 shows the kinematic diagram of the hydrostatic transmissions six-wheel machine.

The figure 2 shows the diagram of the hydrostatic transmissions of the machine with the image of a hydraulic connection between the hydraulic circuits.

The figure 3 shows the hydraulic circuit of the actuator of the pair of wheels of the vehicle together with used hydraulic equipment.

The figure 4 shows the control device for a hydrostatic transmission of the machine.

Shown in figures 1, 2 hydrostatic transmission wheel vehicle with six wheels 1-6, located in pairs evenly along the machine contains a pumping station consisting of three adjustable reversible reversible axial piston pumps 7-9 driven othes 10 internal combustion engines. The shafts of the pumps 7 to 9 have a kinematic linkage gears section of the internal gear with the drive shaft 11 of the pumping station, which is connected with the shaft of the engine 10 controlled friction clutch 12.

With pumps 7-9 pairs are hydraulically connected adjustable reversible axial piston motors 13-18 drive wheels of the vehicle. With the pump 7 trunk hose 19, 20 forming the circulation of the hydraulic circuit associated with the hydraulic motors 13, 14 drive steering the front wheels 1, 2 of the machine. With pump 8 trunk hose 21, 22 forming the other of the circulating hydraulic circuit, are hydraulically connected to the hydraulic motors 15, 16 drive unmanaged secondary wheels 3, 4 of the machine. With the pump 9 trunk hose 23, 24 forming the next circulation of the hydraulic circuit associated with the hydraulic motors 17, 18 of the drive steering of the rear wheels 5, 6 of the machine.

When the front during machine hydroline 19, 21, 23 are pressure, i.e. hose high pressure, and the hydroline 20, 22, 24 are reflexive, i.e. hose low pressure.

Each hydraulic circuit, for example hydraulic circuit of the actuator of the middle wheels of the vehicle (figure 3)contains the feed pump 25 driven from the drive shaft 11 of the pumping station. The cavity of the suction pump 25 suction hydroline 26 through the filter 27 cleaning fluid communicated with the tank 28. With the cavity of the injection charging pump communicated to discharge hydroline 29. Injection hydroline 29 is hydraulically connected with trunk hose through the check valves 30, 31 to maintain a positive pressure in the hydraulic circuit. Parallel reverse the valves 30, 31 are emergency safety valves 32, 33 to bypass the working fluid in the event of excessive pressure from the main hydroline in hydroline 29. Injection hydroline 29 is connected to one of the inputs of four three-position changeover valve 34 controlled by the pressure in the main hose that connected two of its other input. The valve outlet 34 through the retaining valve 35 is connected with the drain hydroline 36, which is connected via the heat exchanger 37 to the tank 28.

The mechanism changes the effective volume of each pump 7-9 contains the hydraulic cylinder 38 double-acting and with four spring-loaded zero-installer three-position reversing valve 39. The valve 39 has a control from two electromagnets, means forming an electrical change displacement pumps. The pump 7 is an electrical means 40 and 41 changes its displacement pump 8 has an electric tool 42,43 change the working volume, the pump 9 is an electrical means 44, 45 changes the working volume (figure 4). Entrance getorcreate the 39 supply hydroline 46 through the orifice 47 is connected to the discharge hydroline 29. Two outputs of the directional control valve 39 is connected with the working cavity of the hydraulic cylinder 38 located on opposite sides of its piston, and a third of its output is communicated with the drain. To limit the maximum pressure generated by the pump during starting of the machine, when the flow rate of working fluid through the hydraulic motors is very small, each hydraulic circuit provided with a shut-off valve 48, which connects with the drain supply hydroline 46, lowering it working fluid pressure. Control input shut-off valve 48 is connected to the trunk hose through the valve OR 49.

The mechanism changes the effective volume of each hydraulic motor includes a cylinder 50 with a piston 51, a spring-loaded toward the piston cavity. Rod cylinder chamber 50 is communicated with the main hydroline, which is the pressure when the forward progress of the machine. With the rod 52 of the cylinder 50 has an elastic connection of the locking element of the three-way two-position valve 53. The inlet valve 53 is connected to the trunk hydroline, which is the pressure when the forward progress of the machine, and the outputs are connected with the piston cylinder chamber 50 and drain. Each valve 53 has a control electromagnet forming electrical means to change the effective volume of the motor. The motors 15, 16 are electrically connected to the means 54, 55 changing their displacement motors 19, 20 and an electrical means 56, 57 changes the working volume of the hydraulic motors 23, 24 are electrically tools 58, 59 change the working volume.

The control unit hydrostatic transmission includes a sensor 60 rotational speed of the driving shaft 11 of the pumping station that generates an electrical signal proportional to the frequency of rotation of the shaft 11. In series with the sensor 60 in the electric circuit between him and electrical means 40-45 change displacement pumps 7-9 are variable resistor 61 and the switch 62 operated by a foot pedal 63 controlling the supply of fuel to the engine 10. In parallel with the switch 62 is a resistor 64. In series with the switch 62 and the resistor 64 is a block 65 of the regulation of pumps and hydraulic motors, one input of which is connected with electrical circuit 66. In this electric circuit is threshold braking element 67, such as a triode, the bias signal from the sensor 60 in the area of higher rotation speed of the pump station exceeding the rotational speed of the shaft of the engine idling. In series with the threshold regulating element 67 is the selector 68 is manually operated intended for changing the direction of movement of the machine by changing the feed direction of working is th fluid under pressure pumps 7-9, providing signal or the electrical circuit 69 to the power means 40, 42, 44 changes the effective volume of the pump 7-9 for the implementation of the forward stroke of the machine or the electrical circuit 70 other electrical means 41, 43, 45 change displacement pumps for the implementation of the reversing machine. In the electric circuit 69 is the switch 71 is manually operated to connect in one of its positions, electrical means 40, 42, 44 changes the effective volume of the pump 7-9 with the selector 68 through the electrical circuit 72 and fixed resistors 73, 74, 75, and to connect to another position with the selector 68 electrical means 42 changes the effective volume of the pump 8 through the resistor 74, and electrical means 40 and 44 changes the effective volume of the pumps 7 and 9, the hydraulic circuit of the drive at the wheels through an electric circuit 76 and variable resistors 77 and 78.

In the electric circuit 79, which connects with the sensor 60 electrical means changes the effective volume of the hydraulic motors is threshold braking element 80, such as a triode having a high threshold of entry into the work, shifting the signal from the sensor 60 in the region of the greater frequency of rotation of the shaft of the pumping station to reduce the working volume of the hydraulic motors started after the end of increasing displacement pumps. PR is than the threshold regulatory element 80 adjustable threshold start signal from the sensor 60, variable pedal 63. To regulate this threshold in an electrical circuit between the electrical power source and the control grid of the triode are variable resistor 81, for example a potentiometer, having a drive pedal shaft 63, and the switch 82, lockable pedal 63 at the end of its stroke simultaneously with the opening operation of the switch 62. In parallel with the switch 82 includes fixed resistor 83. With the release threshold of the regulatory element 80 electrical circuit 84 are connected to electrical means changes the working volume of the hydraulic motors. And electrical means 56, 57 changes the working volume of the hydraulic motors 19 and 20 medium drive wheels 3, 4 is connected to the threshold regulatory element 80 through a constant resistor 85, and electrical means 54, 55 and 58, 59 changes the effective volume of the hydraulic motors of the drive at the wheels 1, 2 and 5, 6 is connected to the threshold regulatory element 80 through resistors 86 and 87. Movable elements are resistors 77 and 86 are driven from the sensor 88 to the differential pressure in the main hose 19 and 21. The sensor 88 is made in the form of a hydraulic motor, a double-acting diaphragm type conducting actuator movable elements of resistors 77 and 86 stems from the membrane, located in the double chamber cell, one cavity which communicates with hydroline 19 hydraulic circuit being who and a pair of front wheels 1, 2, and the other cavity communicated with hydroline 21 in the hydraulic circuit of the actuator of the pair of middle wheels 3, 4. The movable elements of variable resistors 78, 87 are driven sensor 89 differential pressure in the main hose 21 and 23. The sensor 89 is a hydraulic motor diaphragm type with double chamber chamber separated by a membrane, the cavity on one side of which is communicated with hydroline 23 in the hydraulic circuit of the actuator of the pair of rear wheels 5, 6 and the cavity on the other side of the diaphragm communicates with hydroline 21 in the hydraulic circuit of the actuator of the pair of middle wheels 3, 4.

Hydrostatic transmission the machine contains a two-position valves 90, 91 to pressure the message at the front during machine hose hydraulic circuits of the drive at the wheels with pressure hydroline hydraulic circuit of the actuator of the middle wheel and on / off valves 92, 93 for communication between a return at the front during machine hose mentioned hydraulic circuits. With hydroline 21 in the hydraulic circuit of the drive medium wheels 3, 4 are connected by valves 90 and 91 of the hydroline, respectively, 19 and 23 of the hydraulic circuit of the drive front and rear wheels. And with hydroline 22 in the hydraulic circuit of the drive medium wheels 3, 4 valves 92 and 93 are connected to the hydroline 20 and 24 of the hydraulic circuit of the drive extreme to the EU 1, 2 and 5, 6. On / off valves 90, 91 are fitted with electric means 94 of the control electromagnets or solenoids), and on / off valves 92, 93 is supplied with the same electric means 95 management. For automatic on-off valve 90-93 after the regulation of the motors they are connected to an electric circuit 96 to the relay 97 which is connected to the output of the threshold regulatory element 80 located in the electric circuit between the sensor 60 of the shaft speed of the pump station and electrical means 54-59 changes the effective volume of the hydraulic motors. Relay 97 can be performed solenoid comprising a winding connected to the output of the threshold regulatory element 80, and a contact located in the electric circuit 96 between the electrical means 94, 95 of the control valve 90-93 and a source of electric current.

To forcibly reduce the working volume of the hydraulic motors of the drive wheels along the side of the machine, in the case of weak coupling with the ground, the control unit hydrostatic transmission equipped with a switch 98 with manual transmission for connection with a source of electric current through the diodes 99 electric tools 54, 56, 58 changes the effective volume of the hydraulic motors 13, 15, 17, the drive wheels 1, 3, 5, along the starboard side is down, and switch 100 also with manual transmission for connection with a source of electric current through the diodes 101 electrical means 55, 57, 59 changes the effective volume of the hydraulic motors 14, 16, 18, the drive wheels 2, 4, 6, along the left side. For localization of elektrosignal that is dispatched when the contact switch 98 or switch 100 to the mentioned electric means for reducing the effective volume of the hydraulic motors of the drive wheels along the rail cars, electric tools, change working volume of the hydraulic motors drive each outer pairs of wheels connected to a variable resistor controlled by the differential pressure sensor in the hydraulic circuits of the medium drive wheels and drive outer pairs of wheels in parallel with each other through the additional diode 102. Electrical means changes the effective volume of the hydraulic motors 15, 16 drive a pair of secondary wheels 3, 4 are connected to a constant resistor 85 is also in parallel with each other through the additional diode 102.

Pumps 7-9 at low rotational speed of the engine drive shaft 11 pumping stations have zero displacement and therefore do not create pressure in the hydraulic circuits. The working volume of the hydraulic motors before starting the machine maximum. For the movement of the machine by pressing the pedal 63 fuel supply to increase the rotational speed VA is a of the engine 10, and accordingly the driving shaft 11 of the pumping station. The sensor 60 frequency of rotation of the shaft 11 delivers an electrical signal through a variable resistor 61 and a switch 62 for the electric circuit 66 to the threshold regulatory element 67. When the value of the incoming signal is greater than the set threshold, the signal from the threshold of the regulatory element 67 through the selector 68 to electric circuits 69 and 76 through the switch 71 and resistors 77, 74, 78 is supplied to the power means 40, 42, 44 changes the effective volume of the pump. The greater the frequency of rotation of the shaft 11, the greater the magnitude of the signal (voltage)generated by the sensor 60, and hence the greater the magnitude of the signal from the threshold of the regulatory element 67 to the power means 40, 42, 44, providing an increase in work volume pumps. When you start the machine until the rotational speed of the wheels is small and, hence, the flow rate of the working fluid through the hydraulic motors is small, the pressure created by the pumps 7 to 9 in the pressure hose 19, 21, 23, becomes very large. Then the shutoff valve 48, communicating with the drain hydroline 46, the supply through the control valve 39 of the cylinders 38, lowers the pressure therein and thereby limits the increase in the effective volume of the pump and, hence, the number given to them by the fluid. Moreover, the size of the working volume of the pump depends on the size of the displacement of the pedal 63, and the changing resistance of the resistor 61 and, hence, the magnitude of the signal supplied to the power means 40, 42, 44 changes the effective volume of the pump, to ensure operation of the engine at partial and full load economy mode.

When the rotational speed of the motor shaft as the acceleration of the machine reaches a value at which the pumps have a maximum working volume of the signal coming from the sensor 60 becomes sufficient to overcome the threshold set threshold regulating element 80, and then the signal of the electric circuit 79 via resistors 85-87 passes to electric tools 54-59 changes the effective volume of the hydraulic motors. Under the action of electric means of the valves 53, including the work of the direct working fluid under pressure in the piston space of the cylinder 50, causing the working volume of the hydraulic motors by increasing the rotation speed of the engine and thus increasing the speed of the machine decreases.

To ensure dynamic overclocking machine pedal 63 presses the movable element of the switch 62, breaking his contact, and then due to the passage of an electrical signal through the resistor 64, the magnitude of the signal from the sensor 60, with increasing rotation speed of the engine increases to a lesser extent. As a result, in this case, the working volume of the pump d is steget maximum value when the rotational speed of the motor shaft, when the engine has more power, the pressure created by the pumps in the pressure hose, it turns out more. In addition, in this case due to circuit pedal 63 contact of switch 82 is increased stepwise voltage on the grid of triode forming a threshold control element 80, which decrease the effective volume of the hydraulic motors and, hence, the decrease of the transmitted them to the wheels of the vehicle turning (torque) starts at a higher rotational speed of the motor shaft. Therefore, when the break pedal 63 of the switch 62 and the circuit breaker 82 acceleration is more intense.

Using sensors 88, 89 during the movement of the machine in forward motion is the comparison of the pressure in the pressure hose 19, 23 hydraulic circuits of the drive at the wheels 1, 2 and 5, 6 with the pressure in the pressure hydroline 21 in the hydraulic circuit of the drive medium wheels 3, 4. If the pressure in them for some reason is different, then under the action of the resulting differential pressure sensors 88, 89 changing the resistance of variable resistors 77, 78 and 86, 87, changing the value of the signal strength of an electric current)supplied to the electric means of changing the effective volume of the pumps or motors. Thus, if the pressure in the pressure hydroline 19 hydraulic circuit drive the front wheels 1, 2 is less than the pressure in the pressure hydroline 21 in the hydraulic circuit of the drive medium wheels 3, 4, the sensor 88 moves the movable elements of variable resistors 77 and 86, reducing their resistance. Decreasing the resistance of resistors 77, 86 the value of the signal (electrical current)supplied to the power means 40 changes the effective volume of the pump 7 and the electrical means 54, 55 changes the effective volume of the hydraulic motors 13, 14 increases. Is either increase the working volume of the pump 7, or reducing the working volume of the hydraulic motors 13, 14. As a result, the pressure in the pressure hydroline 19 becomes larger and its alignment with the pressure in the pressure hydroline 21. If the pressure in the pressure hydroline 19 becomes greater than the pressure in the hydroline 21, the sensor 88 moves the movable elements are resistors 77 and 86 in the opposite direction, increasing their resistance. Then the magnitude of the signal to an electrical means of changing the effective volume of the pump 7 and the hydraulic motors 13, 14 is reduced. Is either decreasing the effective volume of the pump 7, or increase the working volume of the hydraulic motors 13, 14 and until the pressure in the hydroline 19 will not fall to a value equal to the value of the pressure in the hydroline 21. Similarly, using the sensor 89 and having him drive variable R is sisterof 78 and 87 is an equalization of pressure in the pressure hydroline 23 in the hydraulic circuit of the actuator of the rear wheels 5, 6 with the pressure in the hydroline 21. With a maximum working volume of the hydraulic motors when the signal from the threshold of the regulatory element 80 to the electrical means of changing their working volume is still not received, the adjustment of the pressure in the pressure hose 19, 21, 23 by changing the effective volume of the pump 7, 9 by changing the sensors 88, 89 resistance of variable resistors 77 and 78. When working volume pumps 7-9 with increasing shaft speed of the engine reaches the maximum value, the adjustment of the pressure in the pressure hose 19, 23 to the pressure in the hydroline 21 by varying the effective volume of the hydraulic motors 13, 14 and 17, 18 by changing the same sensors 88, 89 resistance of variable resistors 86, 87, changing the magnitude of the signal supplied to the power means 54, 55 and 58, 59 change the working volume of the above motors.

When the signal from the threshold of the regulatory element 80 by electrical means 54-59 changes the effective volume of the hydraulic motors 13-18, when increasing the rotation speed of the engine reaches a value at which the working volume of the hydraulic motors is minimal and, hence, completes the process control units, switches the relay 97 and the signal transfer from it to an electrical means 94, 95 control dip clap the AMI 90-93. Upon receipt of the signal on / off valves 90, 91 reported pressure hydroline 19, 23 hydraulic circuit drive steering front and rear wheels with pressure hydroline 21 in the hydraulic circuit of the drive medium wheels, and a two-position valves 92, 93 and connect the return hydroline 20, 22, 24. After communication between the above-mentioned hose working fluid passes freely from the hydraulic circuit of the drive medium wheels in the hydraulic circuits of the drive at the wheel back and forth when driving on a winding road with sharp turns, when the average and extreme wheels roll along paths of different length. Due to the free flowing of the working fluid pressure in all three hydraulic circuits, it turns out the same.

When the deceleration of the car because of the increased resistance to its movement and, accordingly, reduction of the frequency of rotation of the motor shaft when the signal from the threshold of the regulatory element 80 by electrical means 54-59 change displacement hydraulic motors, becomes less than the value set relay 97, the signal to on-off valves 90-93 stops and they divide the hydraulic circuits, and electrical means 54-59, receiving the signal of low magnitude, begin actions to increase working is the volume of the hydraulic motors to increase the turning torque at the wheels of the vehicle. While increasing the working volume of the hydraulic motors sensors 88, 89 produce correction signals to electrical means 54, 55 and 58, 59 changes the effective volume of the hydraulic motors 13, 14 and 17, 18 of the drive at the wheels, to ensure equality of pressures in all hydraulic circuits. And after working volume of the hydraulic motors as its increase becomes maximum, is reducing the working volume of the pump and increase created their pressure.

When moving the machine in an inclined position across the hillside or otherwise her roll when the traction wheels of the uplifted side turns out small, insufficient to transfer these wheels delivered to him turning points, and if you get wheels in a rut where waterlogged soil can be forced to reduce the working volume of the hydraulic motors of the drive wheels along this side, and thereby reduce supplied to them turning point to avoid slippage. So, when you roll the machine to the left of the switch 98 connected to a source of electric current means 54, 56, 58 changes the effective volume of the hydraulic motors 13, 15, 17, reducing to the minimum the size of their working volume. After overcoming this section of the route switch 98 unlock and then regulation of the mentioned motors is committed as it was to decree what about the above. With a significant roll the machine to the right is another switch 100 connected to a source of electrical current, electrical means 55, 57, 59 changes the effective volume of the hydraulic motors 14, 16, 18, reducing their working volume to the minimum value and thereby reducing the likelihood of slippage of the wheels 2, 4, 6.

When moving the machine over a ditch or trench switch 71 electric tools 40, 42, 44 changes the effective volume of the pump 7-9 through fixed resistors 73, 74, 75 connected directly with the selector 68 to prevent decrease of the pivotal moments in the extreme wheels hanging over the ditch middle of the wheels.

For car reversing selector 68 serves electrical signal from the threshold of the regulatory element 67 on the electric circuit 70 to the electrical means 41, 43, 45 changes the effective volume of the pump 7-9 and then these reversible pumps serves the working fluid to the hydraulic motors under pressure hose 20, 22, 24, which in this case are the pressure and the hydroline 19, 21, 23 become returnable.

Thus, using a threshold of regulatory elements 67 and 80, with different thresholds start signal from the sensor 60, the rotational speed of the drive shaft of the pumping station is clear, consistent regulation of pumps and motors, as a result excluded the imposition of the POG is Ernesta in the management of these units and thus provided a clear change in their business volumes. Moreover, due to the fact that at the threshold of regulatory element 67 is forced adjustable pedal 63 is first gradually and then abruptly slope, and threshold braking element 80 in the circuit 84 transmission of an electrical signal to the electrical means 54-59 changes the effective volume of the hydraulic motors has a variable pedal 63, the threshold of the beginning of the transmission of the signal when the pedal 63 first, gradually changing it, and then increasing by leap upon actuation of the switch 82, is provided in the work of the engine depending on the driving conditions of the machine or mainly on economy mode, or when a large capacity. At the same time on all modes have equal load on the hydraulic power transmission due to the presence of the offsets of the signals transmitted by electrical means changes the effective volume of the pump and hydraulic motors drive each outer pairs of wheels, made in the form of variable resistors controlled by sensors pressure difference in the hydraulic circuits of the medium drive wheels and drive each outer pairs of wheels, and the availability of on-off valves, automatically connecting all the hydraulic circuits after completion of the regulation of displacements of the pumps and motors.

1. The control unit hydrostatic transmission wheel machines, keyselect of wheels driven by a regulated hydraulic motors, associated hose forming circulating hydraulic circuits, with a pumping station consisting of three adjustable pump driven from the engine of the machine that contains an electric tool change displacement pumps and motors, the speed sensor shaft pumping stations, electrical circuit between the sensor and electrical means changes the effective volume of the pumps and motors, which are the threshold of regulatory elements, on / off valves for messages hose hydraulic circuits of the drive at the wheels with a hose in the hydraulic circuit of the drive medium wheels, while the threshold between regulatory elements and electrical means changes the effective volume of the pumps and motors hydraulic circuits drive extreme wheels are variable resistors controlled by sensors pressure difference in the hydraulic circuits of the medium drive wheels and drive each outer pairs of wheels.

2. The control unit hydrostatic transmission according to claim 1, characterized in that it is equipped with a switch to connect through diodes electrical means changes the effective volume of the hydraulic motors of the drive wheels along the side of the machine from the electrical power source, and electrical means changes the effective volume of the hydraulic motors drive the outer pairs of wheels connected to a variable resistor, controlled by the differential pressure sensor in the hydraulic circuits of the medium drive wheels and drive outer pairs of wheels, and electric means changes the effective volume of the hydraulic motors drive the pair of middle wheels connected to the constant resistor in parallel through additional diodes.

3. The control unit hydrostatic transmission according to claim 2, characterized in that the on / off valves, telling the hydraulic circuits of the drive at the wheels with a hydraulic circuit of the drive medium wheels equipped with electric controls included relay connected to the output of the threshold regulatory element located in the electric circuit between the sensor shaft speed of the pump station and electrical means changes the effective volume of the hydraulic motors.

4. The control unit hydrostatic transmission according to claim 3, characterized in that the threshold regulatory element located in the electric circuit between the sensor shaft speed of the pump station and electrical means changes the effective volume of the hydraulic motors connected to electrical controls on-off valve has an adjustable threshold of the beginning of the transmission signal that is modified by the pedal fuel supply to the engine, with the electric circuit changes to a work about the EMA pumps between the sensor shaft speed of the pump station and the threshold regulating element are variable resistor and a switch, driven pedal, and a resistor in parallel with said switch.



 

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FIELD: transport engineering; hydrostatic transmissions.

SUBSTANCE: proposed hydrostatic transmission contains pumping unit consisting of main and makeup pumps driven by vehicle engine, hydraulic motors connected by main hydraulic lines with pumping unit and forming circulating hydraulic circuit, and electrically driven self-contained pump whose delivery space is connected with hydraulic circuit formed by main hydraulic lines. Hydrostatic transmission is furnished additionally with sealed hydraulic tank with device for charging its air space with compressed air from vehicle pneumatic system and containing shutoff cock, compressed air pressure regulator in sealed hydraulic tank with safety valve and vacuum manual control valve to discharge compressed air from sealed hydraulic tank, two-position manual control valve for alternate hydraulic coupling of suction space of self-contained electrically-driven pump with hydraulic tank and with device for charging the tank with working liquid, check valve arranged in drain hydraulic line at inlet of sealed hydraulic tank, and manually controlled shutoff valve in suction hydraulic line at outlet of sealed hydraulic tank.

EFFECT: improved reliability of hydrostatic transmission of vehicle designed for operation under various road conditions.

5 cl, 1 dwg

FIELD: mechanical engineering; machine building hydraulics.

SUBSTANCE: invention can be used on vehicles and machine-and-tractor units operating under unsteady conditions of movement. Proposed device contains planetary train 1, reactive link 3 connected with drive gear of oil pump 5. Planetary train is connected through carrier shaft with gearbox 9 and is set into operation by engine 11. Two-step adjustable restrictor 12 is installed in pressure main line of pump. Safety valve 14 and control cock 15 are connected to input of adjustable restrictor, being also installed in pressure main line of pump pneumohydraulic accumulator, being end member of pressure main line, is provided with three spaces. It consists of hydraulic cylinder, free piston, piston with rod, piston position regulator, oil line and oil channel. Space between pistons is filled with oil which regulates volume.

EFFECT: reduced influence of vibrations of external traction load onto functioning of machine-and-tractor unit.

2 dwg

FIELD: transport engineering; automobiles with positive displacement hydraulic drive.

SUBSTANCE: proposed transmission includes constant-capacity guided-vane hydraulic pump mechanically connected with vehicle engine communicating through pressure, drain and suction hydraulic lines through hydraulic distributor enclosing pressure and drain hydraulic lines and playing the part of reversor with at least one constant-capacity reversible guide-vane hydraulic motor to transmit torque to one or two driving wheels of automobile. Spaces of suction and drain hydraulic lines communicate with space of hydraulic tank. Suction hydraulic line passes through adjustable hydraulic restrictor whose control lever is mechanically coupled with automobile accelerator pedal.

EFFECT: simplified design of transmission, reduced fuel consumption and weight of transmission and its cost, and increased efficiency of automobile.

18 cl, 5 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to crawler tractors and it can be used in their full-flow hydrostatic transmissions. Said transmission contains dividing reduction unit 2, two parallel final hydrostatic drives with pumps 3, 4 and hydraulic motors 5, 6, track reduction units 17, 18 and two planetary mechanisms. Planetary mechanisms are installed between hydraulic motors 17, 18 and track reduction units 17, 18. Sun gears 9, 10 of planetary mechanisms are connected with each hydraulic motor by two similar gear trains 7, 9. Carriers 11, 12 of each planetary mechanism are connected with epicyclic wheels 14, 13 of other planetary mechanism and with track reduction units 17, 18. invention improves maneuverability of tractor, provides economic recuperation of brake power from trailing side to leading side at turning of tractor, reduced power load on engine at turning, reduced power losses in hydrostatic drives of transmission of tractor with possibility of use of hydrostatic drives of lower installed power.

EFFECT: improved service characteristics of tractor.

1 dwg

FIELD: transport engineering; self-propelled wheeled vehicles.

SUBSTANCE: proposed vehicle contains frame 1 with cab 9, front and rear steerable wheels 4, 6 and middle wheels 5, engine placed behind the cab along vehicle and covered by hood 11. hydrostatic transmission contains pumping station 21 consisting of matching reduction gear driven by engine placed behind the cab, and three pumps connected by pipelines with hydraulic motors providing separate drives of wheels. Hydraulic motors are arranged along frame 1 between sidemembers on solid brackets made in form of boxes with flanges connected with wall of side member between its webs. Invention makes it possible to create ecologically clean and reliable multipurpose all-wheel-drive vehicle of high cross-country capacity with hydrostatic transmission to drive all wheels.

EFFECT: provision of convenient mounting and servicing of transmission units.

5 cl, 7 dwg

The invention relates to the field of engineering, namely volumetric hydraulic transport, road-building, agricultural and other machines

The invention relates to mechanical engineering and can be used in hydraulic systems of tractors, etc

FIELD: transport engineering; self-propelled wheeled vehicles.

SUBSTANCE: proposed vehicle contains frame 1 with cab 9, front and rear steerable wheels 4, 6 and middle wheels 5, engine placed behind the cab along vehicle and covered by hood 11. hydrostatic transmission contains pumping station 21 consisting of matching reduction gear driven by engine placed behind the cab, and three pumps connected by pipelines with hydraulic motors providing separate drives of wheels. Hydraulic motors are arranged along frame 1 between sidemembers on solid brackets made in form of boxes with flanges connected with wall of side member between its webs. Invention makes it possible to create ecologically clean and reliable multipurpose all-wheel-drive vehicle of high cross-country capacity with hydrostatic transmission to drive all wheels.

EFFECT: provision of convenient mounting and servicing of transmission units.

5 cl, 7 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to crawler tractors and it can be used in their full-flow hydrostatic transmissions. Said transmission contains dividing reduction unit 2, two parallel final hydrostatic drives with pumps 3, 4 and hydraulic motors 5, 6, track reduction units 17, 18 and two planetary mechanisms. Planetary mechanisms are installed between hydraulic motors 17, 18 and track reduction units 17, 18. Sun gears 9, 10 of planetary mechanisms are connected with each hydraulic motor by two similar gear trains 7, 9. Carriers 11, 12 of each planetary mechanism are connected with epicyclic wheels 14, 13 of other planetary mechanism and with track reduction units 17, 18. invention improves maneuverability of tractor, provides economic recuperation of brake power from trailing side to leading side at turning of tractor, reduced power load on engine at turning, reduced power losses in hydrostatic drives of transmission of tractor with possibility of use of hydrostatic drives of lower installed power.

EFFECT: improved service characteristics of tractor.

1 dwg

FIELD: transport engineering; automobiles with positive displacement hydraulic drive.

SUBSTANCE: proposed transmission includes constant-capacity guided-vane hydraulic pump mechanically connected with vehicle engine communicating through pressure, drain and suction hydraulic lines through hydraulic distributor enclosing pressure and drain hydraulic lines and playing the part of reversor with at least one constant-capacity reversible guide-vane hydraulic motor to transmit torque to one or two driving wheels of automobile. Spaces of suction and drain hydraulic lines communicate with space of hydraulic tank. Suction hydraulic line passes through adjustable hydraulic restrictor whose control lever is mechanically coupled with automobile accelerator pedal.

EFFECT: simplified design of transmission, reduced fuel consumption and weight of transmission and its cost, and increased efficiency of automobile.

18 cl, 5 dwg

FIELD: mechanical engineering; machine building hydraulics.

SUBSTANCE: invention can be used on vehicles and machine-and-tractor units operating under unsteady conditions of movement. Proposed device contains planetary train 1, reactive link 3 connected with drive gear of oil pump 5. Planetary train is connected through carrier shaft with gearbox 9 and is set into operation by engine 11. Two-step adjustable restrictor 12 is installed in pressure main line of pump. Safety valve 14 and control cock 15 are connected to input of adjustable restrictor, being also installed in pressure main line of pump pneumohydraulic accumulator, being end member of pressure main line, is provided with three spaces. It consists of hydraulic cylinder, free piston, piston with rod, piston position regulator, oil line and oil channel. Space between pistons is filled with oil which regulates volume.

EFFECT: reduced influence of vibrations of external traction load onto functioning of machine-and-tractor unit.

2 dwg

FIELD: transport engineering; hydrostatic transmissions.

SUBSTANCE: proposed hydrostatic transmission contains pumping unit consisting of main and makeup pumps driven by vehicle engine, hydraulic motors connected by main hydraulic lines with pumping unit and forming circulating hydraulic circuit, and electrically driven self-contained pump whose delivery space is connected with hydraulic circuit formed by main hydraulic lines. Hydrostatic transmission is furnished additionally with sealed hydraulic tank with device for charging its air space with compressed air from vehicle pneumatic system and containing shutoff cock, compressed air pressure regulator in sealed hydraulic tank with safety valve and vacuum manual control valve to discharge compressed air from sealed hydraulic tank, two-position manual control valve for alternate hydraulic coupling of suction space of self-contained electrically-driven pump with hydraulic tank and with device for charging the tank with working liquid, check valve arranged in drain hydraulic line at inlet of sealed hydraulic tank, and manually controlled shutoff valve in suction hydraulic line at outlet of sealed hydraulic tank.

EFFECT: improved reliability of hydrostatic transmission of vehicle designed for operation under various road conditions.

5 cl, 1 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in different vehicles and in devices and mechanisms for clashless engagement of driven shafts. Proposed torque converter contains drive and driven units of converter. Drive unit is made in form of disks 2-5 with slots freely fitted on splined shaft 1. Movable blades are fitted in said slots. Driven unit of converter is made in form of cylindrical housing 7 with driven shaft 16 and rings 11 and 12 fitted on shaft. Disks 2-5 with blades 6 of drive unit of converter are arranged inside rings. Slots in disks 2-5 of drive unit of converter are made through being arranged tangentially. Each of rings 11, 12 in cylindrical housing 7 of converter driven unit is installed for rolling on guide 13, being connected with axle-shaft 14 flush-fitted in cradle of step bearing 15 whose body is in rigid engagement with cylindrical housing 7. With drive unit rotating, summary driven torque is formed from its hydraulic and inertia components. Formulas for calculating the torque are given in description of invention.

EFFECT: improved efficiency of hydraulic - inertia converter, its control system, gearbox of converter and method of torque conversion.

24 cl, 1 tbl, 10 dwg

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