SU1499009A1 - Planetary gear box - Google Patents

Abstract

The invention relates to a transport engineering, in particular to a tractor construction industry, and makes it possible to increase the reliability of a planetary gearbox, in which gear-friction discs play the role of ring gears. The working fluid, falling into the cavity between the end of the piston 16 and the bottom of the annular groove of the sleeve 17, causes them to move to the left while moving the satellite 6. When the satellite reaches the leftmost position, the liquid from the cavity between the end of the piston and the bottom of the annular groove of the sleeve disappears through the holes bushings 17, which are made in the outer and inner cylindrical surfaces, as well as through a groove, made in the satellite axis. Under the action of the spring 15, the satellite, the piston and the sleeve return to their original right position. The cycle is continuously repeated. 1 il.

Description

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The invention relates to a transport engineering and can be used in transmissions of automobiles and tractors.

The purpose of the invention is to increase the reliability and durability of the gearbox by leveling wear conditions along the entire length of the teeth of the satellites.

The drawing shows the planetary gearbox row.

The planetary gearbox contains a housing 1, a central wheel with external teeth 2, a carrier 3 with a hollow axis 4, the internal cavity of which serves to supply pressurized oil to the bearing 5 of the satellite 6 through radial holes 7 and 8, made in the body of axis 4 Axis 4 has a groove 9 connected to the internal cavity of the gearbox, as well as a radial bore 10 with a sleeve 11, having a calibrated bore. The central wheel is made in the form of leading toothed-friction disks 12 connected to the driven disks 13 by means of a hydraulic piston 14. The satellite 6 is oyert from one side to the end of the spring 15, and from the other to the end of the pimple 16 installed in the annular groove of the sleeve 17 between the bottom of the annular groove and the end of the piston 16 is a cavity in which a spring 18 is installed. A piston 17 installed in the cavity of the carrier 3 in which there are windows 19 and 20 interconnected in such a way that the right end of window 19 coincides with the end of the cavity the carrier, has a locking ring 21 and holes 22-24, the right edge of the hole 22 coinciding with the left end of the piston 16, and the distances from the axis of the hole 24 to the groove 9 of axis 4 drove 3 and from the axis of the hole 22 to the locking ring 21 equal to half the required satellite travel 6.

Transmission works as follows.

The working fluid used to lubricate the bearings 5 of the satellite 6 enters the inside axis 4 of the satellite 6 through the opening 7. Through the opening of the sleeve 11, the working liquid entering the carrier cavity and through the opening 23 into the cavity between the piston 16 and the bottom of the annular groove of the sleeve 17, acts at the ends of the pistons 16 and 17, which under the action of the spring 15 is in the extreme right position. Due to the effect of the spring 18, as well as the equality of the surfaces of the free face surfaces of the pistons 16 and 17, under the action of the pressure of the working fluid, the first begins to move iiopnjeHb 16, which mixes the satellite 6 to the left, compressing the spring 15, and, besides, with its non-circular surface, the hole 22. 16 moves up to the stop in retaining ring 21, after which it starts moving

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The piston 17. In this way, the window 18 is closed. Since the pressure in the cavity between the piston 16 and the bottom of the annular groove of the sleeve 17 does not decrease, the piston 16 remains firmly in the retaining ring 21, i.e. there is a joint movement of the pistons 16, 17 and the satellite 6 to the left. When the piston 17 reaches the leftmost position, the hole 24 is aligned with the groove 9 of the axis 4 of the carrier 3, as a result of which the pressure in the cavity between the piston 16 and the bottom of the annular groove of the sleeve 17 drops.

The action of the spring 15 begins to move the piston 16 to the right until it stops against the wall of the piston 17, which is still in the leftmost position. This opens the hole 22, aligned with the window 20, as a result of which pressure drops in the carrier cavity in front of the piston end 17 and begins joint movement under the action of the spring 15 of the satellite 6 and the porous 16 and 17 to the right to the extreme right position at which the window 19 overlaps.

To quickly relieve pressure in the cavity between the piston 16 and the bottom of the annular groove of the sleeve 17 in the cavity of the carrier, the holes 22 and 23 have a larger diameter than the hole of the sleeve 11.

During the return of the pistons 16 and 17, as well as the satellite 6 to the extreme right (initial) position, the cycle is repeated.

Thus, the satellite 6 is in continuous reciprocating motion along the axis 4 of the carrier 3, which contributes to the uniform wear of the teeth of the satellite 6 along the entire length. The grooves on the teeth of the x satellites are not produced; there are no difficulties in switching on the friction clutch. Thus, the reliability of the transmission increases.

Claims (1)

Invention Formula A planetary gearbox, containing a housing, at least one planetary row, including a central wheel with external teeth, drove satellites placed on it on the axles and central wheels with internal teeth, made in the form of gear-friction disks for interaction with body or satellites, characterized in that, in order to increase the reliability of the gearbox by leveling the wear of the teeth of the satellites along their entire length, the satellites are spring-loaded to the carrier in the axial direction, in the latter they are connected waiting for a window and the cavity, the gearbox is provided with two cavities placed in porp1n E, one of which is designed as a sleeve with an annular groove at one end and the other that serves therein and spring biased to the bottom of the annular groove in ose1499009 56 BOM direction and the other end of the opert annular groove and the end of the second vonon are the end of the satellite, in each axis there is a piston radial holes for connecting the strip of the carrier cavity to the oil system of the box These drove with the oil system of the gearbox with a drain in the sleeve are made with an opening to drain the oil from the cavity between the holes.