RU2535370C1 - Double cycloidal gear reducer - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: double cycloidal gear reducer comprises an input (2) and an output (1) stages made as planetary pin gears. The studs (16) of parallel crank mechanism protruding beyond the output stage serve as the pins for the input stage.

EFFECT: device provides for wide range of reduction ratios and is of simple design.

3 cl, 5 dwg

Description

The invention relates to mechanical engineering, in particular to drive technology.

Known two-stage planetary gear reducer (US Pat. US 5322485), containing kinematically connected input stage, made in the form of an involute gear transmission, and the output stage, made in the form of a planetary gear chain.

The disadvantage of the known design of the gearbox is the limited gear ratio in general, due to the fact that the involute gear transmission does not provide large gear ratios.

Known two-stage planetary-pinion gear (Pat. EP 0305535), containing kinematically connected input and output stages, made in the form of planetary-pinion gears containing mechanisms of parallel cranks, and the gears of the input stage are placed in a separate housing.

A disadvantage of the known gearbox is the complexity of the design, due to the need for the input stage of a separate housing with hand rods.

The technical result of the invention is the simplification of the design of the gearbox.

The specified technical result is achieved by the fact that the two-stage planetary-pinion gearbox contains kinematically connected input and output stages, made in the form of planetary-pinion gears, and the output stage contains a parallel crank mechanism, while the fingers of the mechanism outside the output stage play the role of pinch gears parallel cranks, in addition, the role of the gears of the inlet stage can be performed by bearings mounted on the fingers of the mechanical Isma of parallel cranks, as well as the output link of the input stage, can be made based on bearings based on the fingers of the mechanism of parallel cranks extending beyond the limits of the output stage.

The invention is illustrated by drawings where:

figure 1 shows the kinematic diagram of the gearbox, in which the role of the gears of the input stage is performed by the fingers of the mechanism of parallel cranks of the output stage;

figure 2 is a kinematic diagram of an embodiment of the gearbox, in which the role of the gears of the input stage is performed by bearings mounted on the fingers of the mechanism of parallel cranks of the output stage;

figure 3 is a kinematic diagram of an embodiment of the gearbox, in which the input stage flanges combined into a single rotary assembly are made based on bearings based on the fingers of the parallel output stage crank mechanism;

figure 4 is a kinematic diagram of an embodiment of the gearbox in figure 3;

figure 5 is a kinematic diagram of a variant of the gearbox, in which the output link of the gearbox is the housing of the output planetary gear transmission.

The two-stage planetary-pinion gearbox contains two - the output stage 1 and the input stage 2, made in the form of planetary-pinion gears. The output stage 1 contains a housing 3 with thrust bearings 4, in which flanges 5 and 6 are installed, connected by jumpers 7 through a window mounted oppositely with the possibility of rotation on the input eccentric shaft 8 of the satellites 9 and 10, interacting with their epicycloidal teeth 11 and 12 with spindles 13 located in the housing 3 and cylindrical surfaces of their holes 14 and 15 with radially spaced fingers 16 of the parallel crank mechanism connected to the flanges 5 and 6. The input stage 2 contains flanges 17 and 18, connected by a jumper 19, passing through the windows mounted opposite with the possibility of rotation on the input eccentric shaft 20 of the satellites 21 and 22, interacting with their epicycloidal teeth 23 and 24 with the role of the gears of the input stage 2 extending beyond the flange by 6 fingers 16 of the mechanism of parallel cranks of the output stage 1 and the cylindrical surfaces of their holes 25 and 26 with the connected flanges 17 and 18 of radially spaced fingers 27 Khanism of parallel cranks. In this case, the role of the pinwheels of the input stage 2 can be performed by bearings 28 mounted on the fingers 16 of the mechanism of parallel cranks of the output stage 1. The flanges 17 and 18 of the input stage 2 combined into a single output rotary assembly can be made bearing bearings 29 and 30, based on the fingers 16 extending beyond the flange 6 of the mechanism of parallel cranks of the output stage 1. The input shaft 31 of the two-stage gearbox is combined with the input eccentric shaft 20 of the input stage 2, and the output the shaft 32 is combined with the flanges 5 and 6 of the output stage 1 combined into a single rotary assembly. The output shaft 32 of the two-stage planetary gear reducer can be combined with the housing 3 of the output stage 1, while the flanges 5 and 6 of the output stage 1 combined into a single assembly must be motionless, which is ensured by their connection with the common housing 33 of the gearbox.

A two-stage planetary gear reducer operates as follows. The rotation of the input shaft 31, combined with the input eccentric shaft 20 of the input stage 2, is converted into plane-parallel motion of the satellites 21 and 22, which, rolling around the fingers 16 playing the role of the spindles, communicate through the fingers 27 of the parallel crank mechanism a rotational movement to the output link - flanges 17 and 18 combined into a single rotary assembly, which in turn communicates rotational motion to the input eccentric shaft 8 of the output stage 1, which is converted into plane-parallel motion of the satellites 9 and 10, cat rye, obkatyvayas on bobbin 13, through the fingers 16 have reported parallel crank mechanism the rotational movement of the output link - the flanges 5 and 6, combined into a single unit with a rotary output shaft 32 two-step planetary gear rack drive.

The two-stage planetary gear reducer, providing a wide range of gear ratios, has a simple design. In addition, the presence of the first stage provides unloading of the output stage of the gearbox.

Claims (3)

1. A two-stage planetary-pinion gearbox containing kinematically connected input and output stages, made in the form of planetary-pinion gears, and the output stage contains a parallel crank mechanism, characterized in that the fingers of the parallel crank mechanism extend beyond the output stage . 2. The two-stage planetary-pinion gearbox according to claim 1, characterized in that the role of the pinwheels of the input stage is performed by bearings mounted on the fingers of the parallel crank mechanism extending beyond the limits of the output stage. 3. The two-stage planetary gear reduction gearbox according to claim 1, characterized in that the output stage of the input stage is based on bearings based on the fingers of the parallel crank mechanism extending beyond the limits of the output stage.

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