RU171112U1 - PLANETARY TRANSMISSION - Google Patents

Abstract

The utility model relates to mechanical engineering, in particular to mechanical gears, and can be used in all sectors of the economy. The planetary gear contains a carrier-eccentric shaft with two eccentrics rotated 180 ° relative to each other, two satellites mounted with thrust bearings on the carrier-eccentric shaft, a parallel crank mechanism, which is a single rotary assembly together with the satellites, containing two flanges connected between each other, fingers passing through through holes on the satellites. The flanges of the rotary assembly are mounted on the wheel in the thrust bearings. The bearings of the carrier-eccentric shaft are located in the bores of the flanges. The flanges of the rotary assembly are mounted on the output movable wheel in the bearings. The outer contour of each satellite is made with n half-cylindrical recesses with the possibility of engagement with n + 1 half-cylindrical protrusions-teeth on the inner contour of the output movable wheel. The radius of the half-cylindrical recesses and protrusions-teeth is the same and equal to the eccentricity value e / 2. Effect: simplified design. 4 ill.

Description

The utility model relates to mechanical engineering, in particular to mechanical gears, and can be used in all sectors of the economy.

Known planetary gear transmission [JP 5032975 B2, IPC F16H 1/32 (2006.01), publ. 26. 09.2012], which contains a stationary sun wheel with handles mounted in semi-cylindrical recesses; carrier-eccentric shaft with two eccentrics rotated 180 ° relative to each other; two satellites mounted with thrust bearings on a carrier-eccentric shaft; a mechanism of parallel cranks, representing a single rotary assembly together with satellites, containing two flanges interconnected by jumpers and fingers passing through through holes on the satellites. The flanges of the rotary assembly are mounted on the sun wheel in the thrust bearings, and the thrust bearings of the carrier-eccentric shaft in the flange bores.

In this device, the rotational motion of the carrier-eccentric shaft is converted into translational and rotational motion of the satellites. Then the rotational movements of the satellites are transmitted through the fingers to the flanges of the rotary device, which serve as a single output link.

Known planetary gear transmission [RU 2502904 C2, IPC F16H 1/32 (2006.01), publ. 12.27.2013], selected as a prototype, comprising a fixed sun wheel, a carrier-eccentric shaft with two eccentrics rotated 180 ° relative to each other, two satellites mounted with thrust bearings on the carrier-eccentric shaft, a parallel crank mechanism, which is a single rotary assembly together with satellites, containing two flanges, interconnected with jumpers and fingers passing through through holes on the satellites. The flanges of the rotary assembly are mounted on the sun wheel in the thrust bearings. The thrust bearings of the carrier-eccentric shaft are located in flange bores. The profiles of the teeth of the satellites on both sides are arcs of circles with radii R ₁ 'R ₂ , the centers of which in the general case do not coincide. The internal boundaries of the active sections of the tooth profiles are removed from the satellite axis at a distance, respectively:

;

;

in which

k = R _e1 N / eZ;

k = R _e2 N / eZ;

where R _e1 and R _e2 are the distances from the axis of the satellite to the centers of the arcs of profile circles;

N is the difference between the numbers of teeth of the sun wheel and satellite;

e - the magnitude of the eccentricity of the carrier-eccentric shaft;

Z is the number of teeth of the satellite,

and the conjugate tooth profiles of the fixed sun wheel are sections of equidistant elongated hypocycloids.

The conjugate tooth profiles of the sun wheel are the equidistant of elongated hypocycloid.

A disadvantage of the known constructions is the presence of a non-technological part — a wheel with a pin set in grooves or a non-technological tooth profile.

The technical problem, the solution of which is provided by the proposed utility model, is to create a planetary gear of a simplified design.

The proposed planetary gear, as in the prototype, contains a carrier-eccentric shaft with two eccentrics rotated 180 ° relative to each other, two satellites mounted with thrust bearings on the carrier-eccentric shaft, a parallel crank mechanism, which is a single rotary assembly together with satellites, comprising two flanges connected to each other, fingers passing through through holes on the satellites, flanges of the rotary assembly are mounted on a wheel in thrust bearings, thrust bearings in Dilo-eccentric shaft positioned in the bores of the flanges.

According to a utility model, the flanges of a rotary assembly are mounted on an output movable wheel in pillow blocks. The outer contour of each satellite is made with n half-cylindrical recesses with the possibility of engagement with n + 1 half-cylindrical protrusions-teeth on the inner contour of the output movable wheel, and the radius of the half-cylindrical recesses and tooth protrusions is the same, and is equal to the eccentricity e / 2.

The proposed planetary gear compared with the prototype has a simpler profile of semi-cylindrical protrusions, teeth and recesses.

In FIG. 1 shows a longitudinal section of a planetary gear.

In FIG. 2 is a cross-sectional view of a planetary gear.

In FIG. 3 is a photograph of an output movable wheel.

In FIG. 4 shows the tooth profiles in engagement.

The planetary gear (Fig. 1, 2) contains an input carrier-eccentric shaft 1 with two eccentrics rotated 180 ° relative to each other, two satellites 2 mounted with thrust bearings 3 on the carrier-eccentric shaft 1.

The parallel crank mechanism, which is a single rotary assembly together with the satellites 2, contains two flanges 4. Through the through holes on the satellites 2 and on the flanges 4 are mounted the fingers 5. The flanges 4 of the rotary assembly are mounted on the output movable wheel 6 in the thrust bearings 7. Support bearings 8 drove-eccentric shaft 1 is placed in the bores of the flanges 4.

The eccentricity of the input eccentric shaft 1 is equal to the center distance e of the movable wheel 6 and the satellites 2.

The external circuit of each satellite 2 is made with n half-cylindrical recesses with the possibility of engagement with n + 1 half-cylindrical protrusions-teeth on the inner circuit (Fig. 3) of the output movable wheel 6.

The radius R of the half-cylindrical recesses (Fig. 4) and the protrusions of the teeth is the same, and is equal to the eccentricity value e / 2.

The planetary gear operates as follows.

The rotation of the input eccentric shaft 1 drives the satellites 2. The satellites 2 run on the fingers 5, acquiring two movements: translational and rotational. Transmitting this complex movement, the semi-cylindrical protrusions of the satellites 2 are engaged with the semi-cylindrical recesses of the output movable wheel 6. The output movable wheel 6 is rolled around in the thrust bearings 7.

Claims (1)

A planetary gear containing a carrier-eccentric shaft with two eccentrics rotated 180 ° relative to each other, two satellites mounted with thrust bearings on the carrier-eccentric shaft, a parallel crank mechanism, which is a single rotary assembly together with satellites, containing two flanges, interconnected, the fingers passing through the through holes on the satellites, the flanges of the rotary assembly are mounted on the wheel in the thrust bearings, the thrust bearings of the carrier-eccentric shaft are in the flange bores, characterized in that the flanges of the rotary assembly are mounted on the output movable wheel in the thrust bearings, the outer contour of each satellite is made with n half-cylindrical recesses with the possibility of engagement with n + 1 half-cylindrical protrusions-teeth on the inner contour of the output movable wheel, and the radius half-cylindrical grooves and protrusions-teeth are the same and equal to the eccentricity value of the carrier-eccentric shaft e / 2.

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