Self-regulating infinitely variable speed transmission

FIELD: mechanical engineering; production of drive units for engineering tools and motor vehicles.

SUBSTANCE: the invention is pertaining to the field of mechanical engineering and may be used in production of drive units for engineering tools and motor vehicles. The self-regulating infinitely variable speed transmission contains: an input shaft 9 and an output shaft 6, a centrifugal type nonadjustable hydraulic pump 3, a gear differential unit 2 with two output shafts 5, 6 and a nonadjustable hydraulic motor 4. The hydraulic pump 3 is connected to the gear differential unit output shaft 5. The nonadjustable hydraulic motor 4 is connected to the gear differential unit output shaft 6, which is an output shaft of the gear differential unit output shaft. Self-regulation of a torque of the output shaft is depending on a load by changing the number of revolutions per a minute of the centrifugal pump using the differential gear of the he self-regulating infinitely variable speed transmission. The technical result is an increased affordability due to reduction of a quantity of gears and lack of the throttling losses of a liquid and to the complete self-regulation.

EFFECT: the invention ensures an increased affordability due to reduction of a quantity of gears and lack of the throttling losses of a liquid and to the complete self-regulation.

1 dwg

 

The invention relates to the field of vehicles, in particular to the structure of the continuously variable transmission of the transmission, and can be used in machine building in mechanisms where it is necessary to change the torque.

Known transmission of a vehicle, containing a removable reducer was installed, including three differential mechanism and the hydraulic pump constant volume kinematically associated with one of the parts of the differential mechanism and hydraulically adjustable choke. By changing the flow area of the throttle governed by the speed of rotation of the hydraulic pump and the gear box [1].

The lack of throttle control are large power loss in the inductor which limits the transmitted load and limits the control range of gear ratio.

Closest to the invention is a hydro-mechanical transmission with two unregulated hydraulic machines, three differential mechanism, the first and second links which are related to the input and output shafts, an adjustable throttle valve, the first hydraulic machines connected with the input shaft, a second hydraulic machines - with the third element of the differential mechanism. Transmission has the throttle, when the second hydraulic machines connected to inductor mode double-flow lane is giving power through hydraulic and differential mechanism, and the full flow mode power transmission through hydraulic and differential mechanism [2].

The presence of three modes increases the range of transmitted loads and speeds, but most of the time this transmission works with throttling, which limits the transmitted load and reduces efficiency.

The technical challenge is to increase efficiency by reducing the number of mechanisms and the absence of losses on the throttling of the fluid and full of self-regulation.

The technical problem is solved due to the fact that self-regulating continuously variable transmission containing gear differential with two output shafts. One of these shafts is connected to the pump of the centrifugal type, the other shaft is connected with the motor and transmission of the vehicle. The pump and the hydraulic motor is connected between a discharge and return line for the passage of fluid.

Properties of the differential mechanism to the output shaft rotates at different speeds depending on the load on them, and the use of the pump of the centrifugal type, where the force on its rotation depends on the amount of the pumped liquid, allows to achieve the technical result.

Self continuously variable transmission includes (see drawing) of the casing 1, the input of the CSOs shaft 9 and the output 6, mechanism gear of the differential gear 2,pump centrifugal type 3, motor 4, the output shafts of the differential mechanism 5-6, pipelines 7 and 8.

Job offer continuously variable transmission consider the example of using it in the car. The power plant via a shaft 9 rotates the differential 2. The shaft 6 is connected to the drive wheels of the vehicle, respectively, when the load of the output shaft 6 connected to the motor 4 begins to rotate the shaft 5 and the pump 3 (differential), as at the beginning of the rotation pressure of the working fluid at the outlet of the pump is insufficient to create a torque on the shaft of the motor 4 and the shaft 6, the pump is not pumping fluid and works as a flywheel, spending a small amount of power. The speed of the shaft 5 and the pump 3 will increase as long as the fluid pressure at the outlet of the pump will not be sufficient to create a torque on the shaft of the motor and the output shaft 6. Then there is the increased speed of the motor 4 and the output shaft 6 (acceleration), and on the shaft 5 and the pump 3 reduce turnover, increase fluid pump and the load on its rotation. When you increase the load (vehicle climb) on the output shaft 6 decreases its speed, decreases the fluid flow in the hydraulic motor, thus reduces the tsya the amount of fluid pumped by the pump and drop it, and the shaft 5 effort on their rotation. There is an increase in speed as long as the pressure at the outlet of the pump 3 will not be sufficient to rotate the hydraulic motor 4, respectively, and the output shaft 6, without changing the speed of the power plant. Pump and a hydraulic motor interconnected discharge 8 and return line 7 for the passage of fluid.

The present invention has a single hydraulic motor and pump, which reduces the number of rotating mechanisms, a smaller amount of fluid involved in the work and the transfer does not require any regulation at work.

All this increases the efficiency and operating characteristics of the proposed transfer.

Sources of information

1. Xenetic I.P. "MTZ-100 and MT-102", Agropromizdat, 1986 s.204, RES.

2. Workman V.M. Features the work and prospects of application of tri-band hydrocodoneonlinele. "Tractors and agricultural machinery, No. 3, 1987, p.15.

Self continuously variable transmission having input and output shafts containing a hydraulic pump, a differential gear mechanism with two output shafts and a hydraulic motor, characterized in that are used unregulated pump, centrifugal type, is connected to one of the output shafts of the differential mechanism, and unregulated hydraulic motor connected with another vyjednavacim differential mechanism, which is the output shaft of self-regulating continuously variable transmission, in which the regulation of the torque of the output shaft depending on the load by changing the number of revolutions per minute centrifugal pump through a differential mechanism of a continuously variable transmission.



 

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