RU1786316C - Planetary herringbone gear - Google Patents

Abstract

Usage: in mechanical engineering. SUMMARY OF THE INVENTION: A planetary gear gear includes two central wheels and a blocking clutch. Annular collars are made on the facing end surfaces of the central wheels. The outer teeth of the central wheels and the inner teeth of the clutch are made straight. A bayonet ring connects both central wheels and is connected to the blocking clutch by a direct coupling. 1 s.p. f-ly. 2 ill.

Description

The invention relates to mechanical engineering, in particular to planetary chevron gears, and can be used in various branches of mechanical engineering.

A known planetary chevron gear train, the internal chevron gear of which contains. two helical epicycles and a blocking coupling; connecting the outer helical rims of these epicycles with the oblique internal teeth. In this case, the midpoints of the helical outer rims of the epicycles are shifted from the centers of gravity of the cross sections of the epicycles, so that when working on a forward stroke, the torques from the radial forces in the gears are directed in the direction opposite to the torques from the axial forces, which accordingly reduces the twisting of the epicycle and uneven load distribution across the width of the inner rim.

The closest technical solution to the invention is a planetary

a chevron gear train comprising two central wheels, each of which has internal chevron teeth and external teeth and a blocking clutch with external and internal teeth for engaging the latter with the outer teeth of the central wheels 2}.

In such a transmission, the forces arising in the internal engagement of the epicycles with the satellites are balanced by axial forces in the engagement of the epicycles with the blocking clutch. As a result, pairs of forces (torsional moments) arise at the site of engagement, causing the epicycle to rotate from its plane (torsion), which leads to misalignment of the engagement and causes uneven distribution of the load across the width of the crowns (tooth length). As a result, the load on one edge of the epicycle becomes significantly larger, and on the other, substantially less than its average value. This leads to a decrease in VI

00 about

with smiling

load capacity of planetary gear, reducing its reliability.

The aim of the invention is to increase the reliability of planetary chevron gears by balancing the loads along the width of the rims of the epicycles on the forward and reverse strokes.

This goal is achieved in that in a planetary chevron gear train containing two central wheels, each of which has internal chevron teeth and external teeth and a blocking clutch with external and internal teeth for the latter to interact with the outer teeth of the central wheels, circumferentially facing each other to each other the end surfaces of the central wheels adjacent to the diameter of the cavities of the teeth of the inner crowns are made of circular collars for interaction with each other, and the outer tooth of the Central wheels and the inner tooth of the blocking clutch is straight.

In addition, the gear is equipped with a bayonet ring having an outer rim on the outer ring, the blocking clutch has an additional rim with internal teeth for engaging with the latter, and the annular collars are radial to surround them with a bayonet ring. ; ; V ;;.:, G.CH; . ....:. ; V. ; -

In FIG. 1 shows a planetary chevron gear train; FIG. 2 is a section AA in FIG. 1.

The planetary chevron transmission contains two central wheels 1, for which annular collars 3 and 4 are made in contact with each other on the inner end planes in diameter adjacent to the internal oblique teeth m 2 in a circle, the outer tooth 5 of the central wheels is straight, on the collars 3 and 4 there are radial protrusions 6 and grooves 7 for assembly, with a bayonet ring 8, where there are also radial protrusions 9 and grooves 10. Assembled: the radial protrusions on the bayonet ring are aligned with the radial protrusions on the collars of the central wheels. Blocking clutch 11 With inner straight teeth 5 and 12, both central wheels 1 and bayonet ring 8. are connected. The blocking clutch 11 is further connected to the housing or output shaft 13.

When working directly, the axial components of the normal forces on the internal oblique tooth x of the two wheels 1 are directed inward (towards each other) and

are perceived by the annular collars 3 and 4. Since the annular collars 3 and 4 of the wheels 1 are located directly at the internal oblique teeth, the torsional moments acting on the rim of each wheel 1 are minimal.

When working on the flyback, the axial components of normal forces on the internal oblique tooth x 2 wheels 1 are directed outward (opposite each other) and are perceived by the bayonet ring 8 through radial protrusions 6 and 9 on the annular collars of 3 and 4 wheels 1. At the same time, the torsional moments acting on the rim of the wheels 1 is slightly larger than on the move.

The rotation of the bayonet ring 8 relative to the wheels 1 during transmission is not possible, since it is connected to

blocking sleeve 11 outer straight teeth 12; -::;

If, under operating conditions, the gear does not operate in reverse, a bayonet ring in a planetary chevron gear is not required. /. The claims of the invention:

Claims (2)

1. A planetary chevron gear train containing two central wheels, each of which has internal chevron teeth and an external tooth and a blotting sleeve with external and internal teeth for interaction of the latter with the external teeth of the central wheels, r with the aim of increasing the reliability, around the circumference of the end surfaces of the central wheels facing each other, adjacent to the diameter of the tooth cavities of the inner crowns, annular collars are made for interaction with each other, and the outer tooth the central wheels and internal the tooth of the locking clutch is made straight.; . .; .- ;. ... . 2. The transmission according to claim 1, wherein it is equipped with a bayonet ring having a crown on the outer surface, the blocking clutch has an additional crown with internal teeth for engaging with the latter, and the ring collars are radial for reaching them with a bayonet ring. FigG Fig z