Reducer

 

(57) Abstract:

Usage: in mechanical engineering. The inventive gearbox includes a housing, an input shaft, at least two two-stage planetary gear with the common planet carrier. Each satellite of the first stage is associated with each satellite of the second stage torsion shaft. Torsion bars can be made between concurrent transmissions with different torsional rigidity. 1 C. p. F.-ly, 3 ill.

The invention relates to the field of engineering, namely gears for messages rotational motion, and can be used as a reducer for the turbo-drill.

Known reducer for turbo-drill, part of the gear-spindle CS-ST. 00.00,000 SA, consisting of two parallel single-stage planetary gear [1] drive shaft transmits torque to the two manufactured along with the shaft leading gears. Each of the drive wheels are engaged by four satellites, mounted on common to both planetary gear drive rod with double roller bearings. The satellites are in engagement with the Central toothed crowns internal gears, enshrined in the s slope opposite.

This gearbox has the following disadvantages:

it is impossible to evenly distribute the load between satellites in the same planetary series, especially if the number of satellites more than three, as in design there are no floating parts or elastic elements;

torque on the driving shaft is transmitted to the spline coupler, so the friction force arising in the latter prevents the displacement of the drive shaft and make a significant irregularity in the distribution of power between the planetary gears;

it is almost impossible to provide uniform load distribution between the rows of wide rollers dual radial bearings receiving the load acting on the satellite axes.

These deficiencies do not allow this gear to have the required resource and sufficient reliability.

Closest to the proposed to the technical essence is a planetary gear comprising a housing, driving and driven shafts connected with the driven shaft drove, installed coaxially parallel series of satellites that communicate with each of the series of satellites of the Central wheel and balancing mechanisms.

In famous as posted on the driver, filled with fluid and hydraulically interconnected bellows, each of which interacts with one of the satellites [2]

The disadvantage of this gearbox is a complicated structural implementation of egalitarian mechanisms, made in the form of a fluid-filled bellows, which increases its diametrical dimensions, requires additional attention during operation because of the inevitable leakage of fluid, leading ultimately to an uneven distribution of power between parallel planetary gear and the reduction of the life of the gearbox.

The aim of the invention is to increase the transmitted power and torque, the increase in the resource at a given diametral size by distributing power between parallel planetary gear.

The objective is achieved by the fact that the gearbox comprising a housing, a drive shaft, at least two parallel two-stage planetary gear with the common planet carrier and balancing mechanisms, the latter is in the form of torsion bars connecting each satellite of the first stage and each satellite of the second stage installed in the driver coaxially avatarname passes their torsion bars can be made with different torsional rigidity.

In Fig. 1 shows the proposed gear (constructive scheme); Fig. 3 section a-a in Fig. 1.

The gearbox is made of two parallel planetary gear. It consists of the input shaft 1, on which are mounted or made at the same time with him leading gear wheel 2 one planetary gear and the drive sprocket 3 other transmission. Gears 2 and 3 respectively are in engagement with multiple satellites 4 and 5 of the first stages of the planetary gear. Each satellite 4 and 5 of the first stage corresponds to the satellite 6 and 7 of the second stage of reduction, which are coaxially mounted on a common for the two planetary gear drive rod 8 on its own for each satellite bearings 9-12 and 13-16.

The gear has an egalitarian mechanisms, made in the form of torsion bars 17 and 18 low torsional rigidity, having at the ends of the spline connecting the satellites 4 and 5 of the first stage and satellites 6 and 7 of the second stage.

Satellites 6 and 7 of the second stage are in engagement respectively with the Central wheels 19 and 20 internal gear fixed to the body 21 of the gearbox via a splined connection.

For ravnomernykh shafts 17 and 18 may be different. This achieves the compensation twisting of individual sections of the drive shaft 1 and the housing 21, perceiving the reactive torque from each of the planetary gear.

The gearbox works as follows.

The drive wheels 2 and 3 result in rotation of the satellites 4 and 5 of the first speed reduction transmission torque satellites 6 and 7 of the second stage through the torsion bars 17 and 18 of the slotted connections. While running relatively fixed in the housing 21 of the Central wheels 19 and 20 internal gears, satellites 6 and 7 on the one hand, and on the other hand satellites 4 and 5, perceives the district's efforts from the driving wheels 2 and 3 result in the rotation of the carrier 8 with the corresponding changes in speed and torque. Drove 8 transmits rotation to the output shaft of the gearbox.

We offer gearbox allows you to increase the transmitted power and torque, but also to increase the life and reliability without increasing Diametric size.

1. A GEARBOX comprising a housing, input shaft, at least two parallel two-stage planetary gear with the common planet carrier and balancing mechanisms, characterized in that the surge m the ing him a satellite of the second stage, coaxially mounted in a drive rod with bearings.

2. The gearbox under item 1, characterized in that the torsional rigidity of the torsion bars between parallel planetary gear are different.

 

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