RU1786319C - Planetary gearbox - Google Patents

Abstract

Usage: mechanical engineering. SUMMARY OF THE INVENTION: a planetary gearbox comprises a housing, input and output shafts, a planetary gear with twin-pinion satellites, two controlled brakes, a controlled clutch, a brake and clutch control distributor, and main auxiliary switching devices. The latter is rigidly connected to the main one and is intended for selective communication with a carrier with a central wheel with external teeth of the planetary mechanism. 1 ill.

Description

The invention relates to mechanical engineering, in particular to planetary, gearboxes used, for example, in transmissions of vehicles.

A known planetary gearbox, a gearbox comprising input and output shafts, a planetary gear with two ring gears, a carrier and a sun gear, and three friction devices.

The disadvantage of this gearbox is the reduced number of gears provided with an increased number of planetary gear units and friction elements, which narrows its technological capabilities and complicates the design.

Also known is a planetary gearbox comprising input and output shafts, a planetary gear with two central wheels with internal teeth; central-wheel with external teeth, carrier with twin-crown satellites, two controlled brakes connecting central wheels with internal

teeth and a housing controlled by a clutch installed between the carrier and one of the central wheels, a brake control distributor and a clutch and a switching device for selectively coupling the output shaft to the carrier and one of the central wheels kinematically connected to the control distributor.

However, this gearbox has a reduced number of gears shifted on the go and a more complex design,.

An object of the invention is to provide an optimum transmission range while simplifying and improving box reliability.

The goal is achieved in that an additional switching device for selectively communicating with the carrier and the central wheel with external teeth is fixedly connected to the input shaft of the planetary gearbox.

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The invention is illustrated by the diagram shown in the drawing.

The planetary gearbox contains input 1 and output 2 shafts, a planetary gear 3 with two central colors 4, 5 with internal teeth, carrier 6, and a central wheel with external teeth 7, two controlled brakes 8, 9, installed between the central wheels 4,5 and the housing 10, a controlled coupling 19 mounted between the carrier 6 and the central wheel 4, the switching devices main 12 and additional 13 in the form of two connected couplings, the main 12 of which are mounted on the input shaft 1 for its selective communication with the central wheel 7 or carrier 5, and an additional 13 of which is mounted on the output shaft 2 for its selective connection with the carrier 6 or the central wheel 7 and the distributor 14 for controlling the brakes 8, 9 and the clutch 10, the Last and the switching device 12 and 13 are connected through one the lever 15, which can be moved in the limiting link 16 with two longitudinal 17, 18 and connecting their transverse 19 components, while the longitudinal components 17, 18 are formed to switch the position of the distributor 14 through the frame 20, and the transverse 19 - to move the switching devices 12 and 13 through the frame 21 and the transmission mechanism 22,

The planetary gearbox provides five gears, i.e. five different speeds of rotation of the output shaft 2 at a constant speed of the input shaft 1;

The first gear is provided in the position of the control lever 15 shown in the diagram. In this case, the input shaft 1 is connected via the clutch 12 to the central wheel 7, the output shaft 2 is connected via the clutch 13 to the carrier 6, and the central wheel brake 5 is applied via the distributor 14. To increase the speed of the output shaft 2, the control lever 15 moves along the component 17 forward, which, by means of the initial brake 8 being activated by the distributor 14, provides the second gear by the central wheel 4, and then by engaging the clutch

10 and planetary gear lock 3 provides third gear,

When the third gear is engaged and the planetary gear is locked, all gearbox elements receive the same rotation speed, i.e. are synchronized. At this moment, without changing the speed of the output shaft 2 by moving the lever 15 in component 19, the controlled clutch 11 is connected, connecting the input shaft 1 by means of a switching device and with a carrier 6, and the output shaft 2 by means of a switching device 13 with a central wheel 7.. . ..

And to further increase the speed of the output shaft 2, the control lever 15 moves forward along the component 18. And, by distributing the brake 8 of the central wheel 4 by means of the distributor 14, it provides the fourth gear, then by activating the brake 9 of the central wheel 5 it provides the fifth gear.

In order to reduce the speed of the output shaft 2, the above is reversed.

Claims (1)

The claims A planetary gearbox comprising a housing, input and output shafts, a planetary gear including two central wheels with internal teeth, a central wheel with external teeth, and a carrier with twin-crown gears, two controlled brakes connecting the central wheels to the internal. teeth, and a housing controlled by a clutch installed between the carrier and one of the central wheels, a brake and clutch control distributor, and a switching device for selectively coupling the output shaft to the carrier and one of the central wheels kinematically connected to the control distributor characterized in that, in order to obtain the optimal gear range while simplifying and improving the reliability of the box, an additional rigidly connected to the main switching device is installed on the input shaft e switching device for selectively communicating with a carrier and a central wheel with external teeth.