(57) Abstract:The invention relates to mechanical engineering and can be used in transmission vehicles. The variator includes mechanical and hydraulic control. The mechanical part consists of coaxially arranged input and output shafts is rigidly secured to them the master and the slave wheel, carrier and multi-gear, and is a leading sprocket with fewer teeth. Hydraulic control formed the conclusion of a pair of conjugate gears in ermetico chamber filled with liquid. Zones of low and high pressure is connected a by-pass channel with the installed managed choke. 3 Il. The invention applies to many fields of engineering and, in particular, can be used in transmission vehicles.Known friction multidisc changers made by the same kinematic patterns that gear and planetary gear. In such progressive change of the gear ratio by changing the calculation of the radius of the rolling disk.However, the disadvantage of this type of variable-speed drives is limited to a load of spasti to the claimed solution is hydromechanical transmission, containing planetary gear, gear pump and hydraulic motor, hydraulically connected through a distribution device that changes the number of working zones of the motor, the working gear of the pump is made in the form satelite and a sun gear connected to the drive shaft, and the working gear of the motor is connected with the driven shaft .The disadvantage of the hydromechanical transmission is the inability stepless change on the output shaft power and torque during constant power, due to the possible application of kinematic schemes.The task of the invention is to provide a stepless regulation on the output shaft power and torque when power is constant.This task is achieved by the fact that the variator includes a housing, input and output shafts, a leading and a follower wheel, and drove liquid.The distinctive signs of significant, i.e., each of them necessary and together sufficient for solving the problem.The variator fitted with a sealed chamber and block the gear mounted on a drive rod and being in engagement with the wheels, leading and follower gear fixed on the input and output is the Amer, zones of low and high pressure chambers are connected by a by-pass channel with the installed managed throttle, and drive wheel is less than that of the slave, the number of teeth.In Fig. 1 shows a variator, a longitudinal section; Fig. 2 - the same, lateral view; Fig. 3 - section a-a in Fig. 2.The variator includes a housing 1, which coaxially installed input 2 and output 3 shafts is rigidly fixed on them leading 4 and led 5 wheels being in engagement with the block-gear 6, which is installed in the driver 7. Carrier includes a fluid-filled chamber, covering a pair of conjugate gears, as well as the bypass channel 8 has mounted on a controllable throttle 9.The variator works as follows.Torque from the input shaft 2 through a driving wheel 4 is transmitted to the block-gear 6, simultaneously with the rotation of the transfer fluid in Mizuno space of the drive wheel 4 and are with her in the meshed gears.When fully open the throttle 9 fluid circulates freely through the bypass channel 8 without creating resistance to rotation of the block-gear 6, which allows it to our teams on the stationary is otulana the flow of fluid, which provides resistance to rotation of the block-gear 6, the resulting torque on the driven wheel 5 and the output shaft 3.With the throttle fully closed 9 circulation of fluid is stopped and the block-gear 6 is locked relative to the carrier 7, resulting in the input 2 to the output shaft 3 and the planet carrier 7 are rotated as one unit.Control transmitted by the variator power enclosed in the interval from the full opening of the throttle degree of opening of the throttle, at which the angular velocity was taken to be zero, with further decrease the degree of opening of the throttle allows you to adjust on the output shaft only torque. The variable-speed drive, comprising a housing, input and output shafts, a leading and a follower wheel, and drove liquid, characterized in that it is fitted with a sealed chamber and block the gear mounted on a drive rod and being in engagement with the wheels, leading and follower gear fixed on the input and output shafts, the liquid fills the sealed chamber, a pair of conjugate gears enclosed in a sealed chamber, zones of low and high pressure chambers are connected by a by-pass channel with the installed managed throttle, and
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
FIELD: machine building.
SUBSTANCE: hydro-automatic output control gear incorporates input shaft 1 and output shafts 3, 4 coupled with propulsion unit and inter-jointed by differential 2, its output elements being coupled with pumps 10, 11 be planetary drive of hydraulic control system. Pumps 10, 11 communicate, via control valve 17, with common fluid flow rate control valve driven by both aforesaid output elements. Aforesaid control valve 17 is articulated to steering drive worm 18.
EFFECT: improved vehicle propulsion performances, better steering, longer life of propulsion unit due to automatic shut-off of fluid flow rate control valve.