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,) - .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,) - . 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.
Claims1. 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.
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.
FIELD: mechanical engineering.
SUBSTANCE: infinitely variable reduction gear comprises input shaft connected with the driving electric motor and output shaft provided with a longitudinal opening connected with the controllable throttle through the coupling. The throttle is connected with the rotatable housing which receives the hydraulic braking device mounted inside the vessel. The hydraulic braking device is made of worm gearing whose worm wheel is connected with the output shaft. The worm wheel is coupled with two worm shafts arranged from both sides of the worm wheel. The axle of each worm shafts is connected with the gearing pump whose intake is connected with the space of the vessel and outlet is connected with the opening in the output shaft.
EFFECT: enhanced reliability and simplified structure.
FIELD: mechanical engineering.
SUBSTANCE: positive-displacement hydraulic-mechanical transmission comprises input shaft (1), output shaft (2), two interconnected reversible controlled hydraulic motors (3) and (4), four-link differential (5), and pumping devices (12), (13), (14), and (15). Satellites (7) and (8) of differential (5) are made in pairs and engage each other. Satellite (8) is wide and interposed between the large solar gear (10) and central wheel (11) with the inner engagement. Satellite (7) is narrow and engages small solar gear (9). Two switching devices (14) and (15) connect the shaft of hydraulic motor (4) with input shaft (1) of the transmission and central wheel (11) with the inner engagement. Two switching devices (12) and (13) connect the shaft of hydraulic motor (3) with output shaft (2) of the transmission and small solar gear (9) of the differential.
EFFECT: reduced mass and sizes and enhanced efficiency.
1 dwg, 1 tbl
FIELD: transport engineering.
SUBSTANCE: invention can be used as gearbox in vehicles or as actuator in tank armament stabilizers. Proposed stepless transmission contains power differential 1, comparing differential 30, regulating differential 2, two self-braking mechanisms 3, 4 operating in release mode, two regulators, and mechanism 36 for equalizing speeds of rotation of central gears of regulating differential. Input of power differential 1 is connected with drive and with input of regulating differential 2. Central gears 17, 18 of power differential are rigidly connected with driven members 15, 16 of self-braking mechanisms and are connected with central gears of comparing differential 30 to provide rotation of the latter in opposite directions. Driving members 13, 14 of self-braking mechanisms are connected with central gears of regulating differential by mechanism 36 equalizing speeds of rotation and are rigidly connected with regulators.
EFFECT: enlarged range of change of gear ratio, improved dynamic characteristics of vehicle, its reliability and multipurposeness.
FIELD: mechanical engineering and machine-tool building.
SUBSTANCE: invention can be used in vehicles and machine tools, different machines and mechanisms. Proposed continuously-variable transmission contains drive and output shafts and case accommodating drive and drive and driven constant-mesh gears, differential with coaxial gears mechanically engaging through planet pinions and provided with coaxial axle-shafts, and gear ratio changer including axial-plunger pump with inclined plate with rotary working member, pressure line and suction line connected with reservoir filled with working liquid. Adjustable bypass restrictor is installed in pressure line of pump. Output of restrictor is connected with said reservoir by drain line. Rotary working member of pump is made in form of block of working cylinders accommodating plungers, each being mechanically coupled with inclined plate. Differential is arranged inside working cylinder block of axial-plunger pump with coaxial arrangement of drive and driven gears and said block, and it has at least one pair of planet pinions installed for rotation in cylinder block of axial-plunger pump. Constant-mesh drive gear is connected with drive shaft, and constant-mesh driven gear is connected with drive gear of differential. Invention is aimed at enlarging functional capabilities of transmission owing to provision of limitation of speed of rotation and braking of output shaft, interruption of torque on shaft and control of delivery of pump included into gear ratio changer of transmission and increase of service life and provision of uniform rotation of output shaft and increase of efficiency of transmission.
EFFECT: enlarged operating capabilities, increased efficiency of transmission.
22 cl, 4 dwg
FIELD: mechanical engineering.
SUBSTANCE: infinitely variable transmission comprises power differential (1), synchronizing differential (2), two self-braking mechanisms (3) and (4), and two controllers. The input of power differential (1) is connected with the drive and input of synchronizing differential (2). Central wheels (17) and (18) of the power differential are connected with driven links (15) and (16) of self-braking mechanisms (3) and (4). Driving links (13) and (14) of self-braking mechanisms are connected with central wheels (19) and (20) of the synchronizing differential and controllers. Driven shaft (26) is connected with one of the central wheels of power differential (1).
EFFECT: expanded functional capabilities.
FIELD: mechanical engineering.
SUBSTANCE: variable-speed drive comprises two differential stages connected in series. The differential sage whose shaft is connected with the engine is the input shaft of the variable-speed drive and is made of a differential mechanism. The second differential stage is a hydraulic differential converter provided with two planet rows defined by the kinematical links of multi-gearing hydraulic pump and hydraulic motor provided with different gear ratios . The axles of the satellites of the first and second differential stages are mounted inside the housing . The housing is set in bearings inside the crankcase of the variable-speed drive and represents a carrier for both of the differential stages. The carrier is provided with the free running clutch.
EFFECT: enhanced efficiency.
FIELD: engines and pumps.
SUBSTANCE: invention refers to devices for stepless converters of torque and rotary motion. A gear variator contains two differential mechanisms (1, 2), two reducers (3, 4) with different ratios. One of the shafts of each reducer is connected to a hydro pump (11) equipped with an adjustable valve. Two differential mechanisms and two reducers are arranged so that input shafts of the reducers are at the same time half axes of the first differential mechanism, while output shafts of reducers are half axes of the second differential mechanism. The differential allows distribution of rotation between half axes within range from zero to a speed of a drive shaft on one of the half axes which corresponds to interval from the speed of the drive shaft to zero on the other half axis. A rotation speed of the variator driven shaft can be adjusted by means of adjustable valves through which liquid is pumped by gear oil pumps driven with specified shafts of the mechanism.
EFFECT: variator allows to change value of torque within any given range.
FIELD: engines and pumps.
SUBSTANCE: invention relates to a hydromechanical transmission incorporating a split mechanical and hydrostatic drives and is designed to be used in agricultural tractors. The hydromechanical four-gear infinitely-variable transmission incorporates planetary mechanism (32) including three planetary trains (34, 36, 38), four clutches (C1, C2, C3, C4) and brake (48) to throw in reverse. First hydrostatic assembly (20) is in mesh with planetary mechanism second crown gear (R2). In the First and Fourth gears, second hydrostatic assembly (18) is in mesh with carrier (28) thrown in by first clutch (C1). In the Second and Third gears, second hydrostatic assembly is thrown into mesh with sun gear (S2) of the planetary mechanism second train by second clutch (C2). In the First and Second gears third clutch (C3) meshes carrier (28) with output shaft (46). In the Third and Fourth gears, fourth clutch (C4) meshes sun gear (S2) of the second planetary train with output shaft (46). Third planetary train (38) incorporates brake (48) to throw in reverse. When brake (48) meshes to throw in reverse and both clutches, third and fourth, (C3, C4), are disengaged, third train sun gear (S3) and, hence, transmission output shaft (46) runs reverse.
EFFECT: infinitely-variable transmission with steady efficiency in operating conditions.
27 cl, 6 dwg