SU1409804A1 - Planetary precessional gear - Google Patents

Abstract

The purpose of the invention - increasing of the kinematic precision, increasing of rigidity and durability at the expense of the fact that each roll (6) of the central wheel (5) made barrel-shaped with the barrel-shapeness accelerated radius at the transition from the face having a smaller diameter to the face with a higher diameter. between the central wheel (5) body and the conic rolls (6) faces are installed an elastic element (10) for exclusion of the wheel eccentricity influence on the summary kinematic error of the transmission. At the rotation of the driving shaft (4) the precession wheel (2) interact with the rolls (6) of the central wheel. Owing to the difference of the wheels teeth and rolls (2) and (5) the driven shaft (9) receives rotation with a settled reduction.

Description

The invention relates to mechanical transmissions and (it is necessary to use EtaHo in various fields of mechanical engineering, including robotics, instrumentation in the following drives of automated systems.

The purpose of the invention is to increase the kinematic accuracy, increase reliability and durability due to that-} x) that each roller is spring-loaded along its axis and is barrel-shaped with an increasing barrel radius of 1 when moving from the end with 1 | 1 smaller diameter to the end of andme

; Figure I shows planetary recession (transmission, longitudinal) section | FIG. 2 is a tapered roller;

and the central 5 wheels the driven shaft 9 receives rotation with a reduction

where Z, and

1 Zs Z2

Z 5 Z g

the number of teeth and rollers, respectively, precessive and central wheels 2 and 5.

The installation of the elastic element 10 between the case of the central wheel 5 and the ends of the tapered rollers 6 allows, if necessary, some play of the rollers in the axial direction, which leads to the exclusion of the wheel eccentricity on the total kinematic transmission error.

Precession wheel 2 with teeth,

25

thirty

35

The figure is a tooth of the precessional cola-20 made in the form of conical rifca in the form of conic rollers.

The planetary precession gear comprises a body 1, a precession cum-wheel 2 mounted on the crescent 3, rigidly connected with a drive shaft 4, a movable central wheel 5 with teeth, conical rollers 6, a gear coupling containing a gear crown 7, rigidly sprung zanan with a precessional wheel 25 and a gear rim 8, rigidly connected with the driven shaft 9. Elastic element 10 is mounted between the casing of the central wheel 5 and the end face 1 of the rollers

The precessional wheel 2 (FIG. 3) can also be made with teeth in the form of tapered rollers I1 and installed between two central wheels, rigidly connected to housing 1 and made with the same number of teeth

Rollers 6 or 11 are made barrel-shaped with an increasing barrel radius at the transition from the end with a smaller diameter to the end with a larger diameter.

Planetary precession transfer works as follows.

The rotation from the drive shaft 4 is transmitted to the precession wheel 2, the tooth of the precession wheel 2 interacts with the rollers 6 of the central wheel 5 (), thanks to the difference of the teeth and the rollers of the precession 2

40

45

50

I1, performs precessional movement. In this case, the rollers 1I engage with two teeth on the central wheels rigidly connected to the housing.

H) the cushioning of the rollers 6 of the central wheel 5 barrel-shaped reduces the influence of the wheel skew on the total NK) kinematic transmission error. In addition, this technical solution leads to a reduction in the requirements for the assembly of gears,

Claims (1)

Invention Formula A planetary precession gear, comprising a housing, leading with a crank and driven shafts, a movable centering wheel mounted by means of bearings on the drive shaft for interacting with the precession gear with them, the tooth of one of the wheels is made in the form of conical rollers, the vertex of which is turned to the transmission axis , and a gear coupling connecting the precession wheel with the drive shaft, in order that, in order to increase kinematic accuracy, increase reliability and durability, each roller is spring loaded b its axis and is made barrel-shaped with an increasing barrel radius when going from the end with a smaller diameter to the end with a larger diameter e five 0 five 0 made in the form of conical ro 0 five 0 I1, performs precessional movement. In this case, the rollers 1I engage with two central teeth; wheels rigidly connected to housing 1. H) the cushioning of the rollers 6 of the central wheel 5 barrel-shaped reduces the influence of the wheel skew on the total K) the kinematic error of the transmission. In addition, this technical solution leads to lower requirements for the assembly of the transmission, Invention Formula A planetary precession gear, comprising a housing, driven with a crank and driven shafts, a movable centering wheel mounted by bearings on the drive shaft for interacting with the last precession gear, the tooth of one of the wheels is made in the form of conical rollers, the vertex of which is turned to the transmission axis, and a gear coupling connecting the precession wheel with the drive shaft, characterized in that, with a view. increase kinematic accuracy, increase reliability and durability, each roller is spring-loaded along its axis and made barrel-shaped with an increasing barrel radius when going from the end with a smaller diameter to the end with a larger diameter e (pas. 2 fie.Z