Infinitely variable reduction gear

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.

1 dwg

 

The invention relates to mechanical engineering and can be used to create a continuously variable transmission vehicles.

Known reversible stepless gearbox, containing the input and output differentials connected to the control unit gear ratio made in the form of two hydraulic gear pumps, the outputs of which are connected with an adjustable throttle (RF patent No. 2188351, BI, 2002).

A disadvantage of the known device is its complexity due to the presence of a large number of mechanisms and their connections in a single system.

Closest to the claimed object on the constructive characteristics and the results achieved is controlled actuator sucker rod pump containing an input shaft connected to a drive motor, an output shaft connected to the rotating body a controlled drive, placed in a container, an input shaft connected to the crank and through him with the pistons, the cylinders of which have input and output valves, and the output valve is connected with an adjustable choke (a utility model Certificate No. 308771, B. I. No. 19, 2003).

The disadvantage of this device, taken as a prototype, is its complexity due to the presence of a large number of paired merbaby parts, which generally reduces the reliability of the device.

The problem to which the invention is directed, is to simplify the construction and improve the reliability.

To solve the problem in the gearbox with the stepless change gear ratio, containing an input shaft connected to a drive motor, an output shaft connected to the rotating body, placed in a container, the output shaft is made of a longitudinal hole, United by a coupling with adjustable choke, in the rotating case posted by a hydraulic brake device, unlike the prototype of the hydraulic brake device is designed as a worm nasmotrevshayasya gear, worm wheel which is connected with the input shaft with the worm wheel meshed two worm shaft, diametrically remote from each other, located on both sides of the worm wheel, the axis of each the worm shaft is connected with a gear pump, the inlet of which is connected with the cavity of the tank, and the output from the longitudinal bore in the output shaft.

The drawing shows a diagram of the inventive device.

Input shaft 1 is connected with the worm wheel 2. The worm shaft 3, is placed in a rotating body 4, are in engagement with the wheel 2. Housing 4 is connected to the output shaft 5, provided with a longitudinal what tertium. The axis of the worm shaft 3 is connected with a gear pump 6. The inlet of the pump 6 extend into the cavity of the tank 7 filled with engine oil. The outlet of the pump 6 through the pipes 8 are connected with the longitudinal bore of the output shaft 5, through which the clutch 9 is connected with an adjustable choke 10.

The device operates as follows. In the initial moment of time adjustable choke 10 is fully open. The rotation of the input shaft 1 through a worm wheel 2 is transmitted to the worm shaft 3 of the gear pump 6. Pumps 6 when you open the throttle 10 is pumped working fluid without resistance. If the closed throttle 10, the resistance of the output fluid from the pump 6 increases, which leads to an increase of the braking torque on the worm shaft 3. When this starts to rotate the housing 4 and connected with it the output shaft 5. Increasing the flow resistance of the working fluid from the pump 6 through the throttle 10, increases the speed of rotation of the output shaft 5. Upon full closing of the throttle 10, the resistance of the output fluid from the pump 6 becomes maximum, the pump 6 and the worm shaft 3 is stopped, the rotation speed of the output shaft 5 becomes equal to the angular speed of rotation of the input shaft 1. Thus, by throttling the working fluid leaving the pump, you can smoothly change the gear ratio from 0 to 1. The inventive device can be made in the form of a tank with an oil bath, in which submerged all the mechanisms, and the oil is used for lubrication of moving parts, and as a working fluid for the pumps. Adjustable choke, made in the form of a three-way valve, can be controlled both manually and by using a servomechanism, remotely. Possible software control.

In comparison with the known structures of the gears of the proposed technical solution has the following advantages:

- simple design, due to the presence of a small number of parts;

- increased reliability associated with the simplicity of the kinematic chain;

- the use of hydraulic pumps as braking devices can improve the life of the gearbox and to reduce wear, which increases the performance of the gearbox.

Made in the inventive design effect does not follow clearly from the prior art, since, as a rule, simplifying the design inevitably led to a reduction in the functionality of the device. In this case, the simplification of the structure resulted in improved resource indicators while maintaining functionality.

Gear stepless change gear ratio relationship is, containing an input shaft connected to a drive motor, an output shaft, which is made a longitudinal hole, United by a coupling with an adjustable throttle connected with the rotating body, in which is placed a hydraulic brake device, placed in a container, characterized in that the hydraulic brake device is designed as a worm nasmotrevshayasya gear, worm wheel which is connected with the input shaft with the worm wheel functionally connected the two worm shaft, diametrically remote from each other, located on both sides of the worm wheel, the axis of each worm shaft associated with the gear pump, the inlet of which is connected with the cavity tank, and the output from the longitudinal bore in the output shaft.



 

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FIELD: transport engineering.

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1 dwg

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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.

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1 dwg

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.

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FIELD: mechanical engineering.

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FIELD: mechanical engineering and machine-tool building.

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FIELD: mechanical engineering.

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EFFECT: expanded functional capabilities.

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FIELD: mechanical engineering.

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EFFECT: enhanced efficiency.

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