Hydromechanical transmission

 

(57) Abstract:

Transmission is intended for transmission vehicles. The transmission includes driving and driven shafts, hydrostatic transmission, comprising two hydraulic machines, of which at least one is made adjustable, mechanical transmission, comprising matching the transmission and differentials, made in the form of planetary mechanisms, forming with hydrostatic transmission closed contours, while in the kinematic chain from the drive shaft to the epicycle gear of one of the differentials set operativety hydrodynamic transformer. Effect: increased reliability. 1 Il.

The invention relates to a multi-range hydromechanical transmission and can be used in transport machine-building as the Central transmission transmissions tracked transport and traction machine, two tracked vehicles, tracked chassis of woodworking machines, caterpillar industrial and agricultural tractors, transmissions wheeled tractors heavy-duty trucks, earth-moving machines, graders, loaders etc.

From the patent literature known is s constant mesh, and two planetary mechanism with friction controls located coaxially to each other, the torque Converter and the mechanism of reversal (see Author's certificate 903226 from 23.05.80).

Also known operativety torque Converter, comprising a housing mounted therein with the formation of the closed cavity of the pump and turbine wheels and a reactor with a fixed bearing (see Author's certificate 1455100 from 01.10.88).

The closest technical solution, taken as a prototype, is a hydromechanical transmission that contains the driving and driven shafts, hydrostatic transmission, comprising two hydraulic machines, of which at least one is made adjustable, mechanical transmission including a differential, made in the form of planetary mechanisms, forming a hydrostatic transmission closed circuit, and a switching device made in the form of three planetary mechanism (see Patent 209672 from 12.07.93).

However, such programs have narrow ranges of changing the gear ratio of the transmission, narrow intervals stepless speed machines and complex structure.

The objective of the invention is to extend the functionality of the hydromechanical transmission from the drive shaft to the epicycle gear of one of the differentials set operativety hydrodynamic transformer.

The technical result is expressed:

- to reduce the number of ranges and the hydro-mechanical transmission to two;

get a wide intervals stepless speed machines and specific thrust forces;

- use qualities of the torque Converter: the automaticity, estupendos, the reduction of dynamic loads, ensure the stable operation of the engine;

- to simplify the design by eliminating the coupling of one of the ranges, clutch and locking clutch of the torque Converter;

- to improve the reliability of the transmission and the reduction of its cost.

This object is achieved due to the fact that hydro-mechanical transmission that contains the driving and driven shafts, hydrostatic transmission, comprising two hydraulic machines, of which at least one is made adjustable, mechanical transmission, comprising matching the transmission and differentials, made in the form of planetary mechanisms, forming with hydrostatic transmission closed contours, in the kinematic chain from the drive shaft to the epicycle gear of one of the differentials set operativety hydrodynamic transformer.

What is new is that, differentials installed operativety hydrodynamic transformer.

Installation of the hydro-mechanical transmission operatyvumo hydrodynamic transformer allows to reduce the number range hydromechanical transmission to two; get wide ranges stepless speed machines and specific thrust forces; to use a quality torque Converter: the automaticity, estupendos, the reduction of dynamic loads, ensure the stable operation of the engine; to simplify the design by eliminating the coupling of one of the ranges, clutch and locking clutch of the torque Converter; to improve the reliability of transmission and to reduce its cost.

The drawing shows a kinematic diagram of a hydromechanical transmission.

Hydromechanical transmission contains a leading 1 and slave 2 shafts, the input gear 3, operativety hydrodynamic transformer 4, hydrostatic transmission 5, a differential gear 6 of the first range and the additional transmission, differential 7 second range, matching the transmission 8 of the first range; approving the transfer of the 9 second range; the actuator volume of the pump 10, the drive motor 11 of the first range and the additional transmission; drive 12 second range; operated ecstasy a cylindrical gear, consisting of gears 15 and 16, and connects the drive shaft 1, the torque Converter 4.

Operativety hydrodynamic transformer 4 comprises a pump wheel 17, the turbine wheel 18, the wheels of the reactor 19.

Hydrostatic transmission 5 includes two hydraulic machines: volumetric pump 20 and the hydraulic motor 21. The pump 20 is adjustable and is connected with the drive shaft 1 through the pump 10.

The differential 6 is made in the form of a planetary mechanism, consisting of the epicycle gear 22, drove 23 24 satellites and the sun gear 25. Epicycle gear 22 through matching the transmission 8, consisting of gears 26 and 27 are connected with the turbine wheel 18 of the torque Converter 4. The sun gear 25 through the drive of the motor 11, consisting of a number of cylindrical gears with gears 28, 29 and 30, connected with the motor 21. Carrier 23 is connected with the driven shaft 2.

Differential 7 is designed as a planetary mechanism, consisting of the epicycle gear 31, the carrier 32 with satellites 33 and the sun gear 34. Carrier 32 through matching the transmission 9, consisting of gears 35 and 36, and the clutch 14 is connected with the turbine wheel 18 of the torque Converter 4. The sun gear 34 through the drive motor 12, consisting connected with the driven shaft 2.

The pump 10 consists of gears 40 and 41. Gear 40 is connected with the drive shaft 1 and the gear 41 with the pump 20.

Controls: brake 13 additional transmission and clutch 14 second range.

Hydromechanical transmission has two ranges and additional transfer:

the first double-flow range with torque Converter and hydrostatic transmission, when a branch occurs the flow of power and torque Converter filled; range is used when moving the machine from place and acceleration;

- second double-flow volume hydromechanical range, when in the mechanisms of circulation or branching the flow of power and torque Converter drained; the range is the basic movement of the machine;

additional transmission - full flow volume hydromechanical range - when all the power is transmitted through a volumetric hydraulic drive.

The first double-flow range is formed by filled the torque Converter 4, the clutch 14 and the brake 13 is turned off.

Power is transmitted in the mode of branching in two streams: from the drive shaft 1 through the input gear 3, the torque Converter 4, matching the transmission 8 to the epicycle 11 sixth to the sun gear 25, and from the carrier 23 to the follower shaft 2. Parameter regulation of the pump varies in the range 0...-1, and the gear ratio of the torque Converter varies in the range 0...1.

The second double-flow volume hydromechanical range is formed by the inclusion of the coupling 14, the brake 13 is turned off, the torque Converter 4 is drained.

Power is transmitted in two modes: in the circulation and in the mode of branching.

The power circulation mode is transmitted in the closed loop transmission from the drive shaft 1 through the input gear 3, the clutch 14, the matching transmission 9 to the cage) 32 differential 7, in which power is divided into two streams: from the epicycle gear 31 to the follower shaft 2 and in the opposite direction from the sun gear 34 through the drive motor 12, hydrostatic transmission 5, the pump drive 10 drive shaft 1. Parameter regulation of the pump varies in the range -1...0.

The power branching is transmitted in two streams: from the drive shaft 1 through the input gear 3, the clutch 14, the matching transmission 9 to the cage 32 differential 7; from the driving shaft 1 through the pump 10, hydrostatic transmission 5, the drive motor of the second band 12 to the sun gear 34 different is the regulation of the pump varies in the range 0...+1.

Additional transmission - full flow volume hydromechanical range is formed by turning on the brake 13. The clutch 14 is turned off, the torque Converter 4 is drained. Power is transmitted from the driving shaft 1 through the pump 10, the main pump 20, the hydraulic motor 21, the drive motor 11 to the sun gear 25 and stopped epicycle gear 22 through the carrier 23 to the follower shaft 2. Parameter regulation of the pump varies in the range 0...+1 or 0...-1, while the movement of the machine is provided as the front and back.

Hydromechanical transmission that contains the driving and driven shafts, hydrostatic transmission, comprising two hydraulic machines, of which at least one is made adjustable, mechanical transmission, comprising matching the transmission and differentials, made in the form of planetary mechanisms, forming with hydrostatic transmission closed contours, characterized in that the kinematic chain from the drive shaft to the epicycle gear of one of the differentials set operativety hydrodynamic transformer.

 

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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.

1 dwg

FIELD: mechanical engineering.

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EFFECT: reduced mass and sizes and enhanced efficiency.

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FIELD: transport engineering.

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EFFECT: enlarged range of change of gear ratio, improved dynamic characteristics of vehicle, its reliability and multipurposeness.

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EFFECT: enlarged operating capabilities, increased efficiency of transmission.

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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.

1 dwg

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