RU2569077C1 - Gearing - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: tooth profiles of the gearing are made out of displaced relatively to each other along the circle of similar rims. Rims of one of profiles have cycloidal form of tooth, and rims of the another profile are made in form of segments movably installed on the eccentric shaft, segments have low number of round shape teeth, for example, in form of roller bearings.

EFFECT: large values of gearing ratio in single stage, high efficiency, and high specific power.

2 cl, 19 dwg

Description

The invention relates to the field of engineering, in particular to mechanical gears with cycloidal gearing.

A gear train is known (AS USSR 911069), containing meshed composite gear profiles, each of which is composed of individual crowns displaced in phase relative to each other.

A disadvantage of the known transmission is the limited ability to achieve large gear ratios.

Eccentric-cycloidal engagement is known (Patent RU 2385435), containing composite gear profiles, each of which is composed of individual crowns displaced in phase relative to each other, the crowns of one profile having one tooth in the form of a circle eccentrically offset relative to the center of rotation, and the crowns of the other profile have a cycloidal tooth shape, with each eccentric crown of a single-tooth profile formed by the outer race of the bearing, mounted on an eccentrically offset portion of the common shaft.

A disadvantage of the known transmission is also the limited possibility of increasing the gear ratio with overall transmission constraints, since an increase in the gear ratio with overall transmission constraints is possible only by reducing the diameter of the single-tooth profile bearing, which receives significant radial loads when transmitting torque and is placed on an eccentric shaft, which structurally difficult.

The technical result of the invention is to improve the quality of the gear according to the gear ratio in one step.

The specified technical result is achieved in that the gear train contains the gear teeth of the composite gears with cycloidal and circular tooth shapes, each of which is composed of separate gear crowns displaced in phase relative to each other, while one of the gear profiles is formed by movably mounted on eccentric sections of the common shaft with crowns made in the form of segments with the number of teeth of at least two, and the tooth profile of the segments has a circular shape, which can be formed elami rotation, for example mounted on the bearing axle.

The invention is illustrated by drawings, where:

in FIG. 1 shows a gear transmission of rotational action,

in FIG. 2 is a section AA in FIG. one,

in FIG. 3 - multi-threaded gear with three kinematically interconnected eccentric shafts,

in FIG. 4 is a kinematic diagram of a rotary gear reducer with external gearing,

in FIG. 5 is a kinematic diagram of a gearbox of rotational action of part-turn with external gearing,

in FIG. 6 is a kinematic diagram of a gearbox of rotary action with internal gearing,

in FIG. 7 is a kinematic diagram of a gearbox of rotary action with internal gearing part-turn,

in FIG. 8 is a kinematic diagram of a rotary gear of rotational action of a rotational action with a through hollow shaft,

in FIG. 9 is a kinematic diagram of a rotary reducer with several segments kinematically connected to each other through eccentric shafts,

in FIG. 10 is a kinematic diagram of a differential-type rotary reducer,

in FIG. 11 is a kinematic diagram of a rack and pinion transmission,

in FIG. 12 is a kinematic diagram of an angular transmission,

in FIG. 13, 14 - General view of the gear with external gearing,

in FIG. 15, 16 - General view of the gear with internal gearing,

in FIG. 17, 18 is a General view of the rack and pinion transmission,

in FIG. 19 is a perspective view of a gear based circular gear drive.

The gear train consists of two composite profiles 1 and 2. Profile 1 is composed of separate, gears 3 displaced in phase relative to each other, having a cycloidal shape of the teeth. A profile 2 is composed of segments 5 movably mounted on an eccentric shaft 4 and offset in phase relative to each other, having circular teeth, made, for example, in the form of bearings 6, mounted on axes 7 in the cheeks 8 of segments 5. In FIG. Figures 4-12 show options for kinematic schemes of gearboxes based on the gear in question.

The gear transmission operates as follows. The rotational movement of the eccentric shaft 4 in one revolution is converted to the movement of the profile 1 by one step as a result of the force action of the teeth of the profile 1 on the teeth of the profile 2, while the phase gears 3 displaced in phase and also the phase 5 segments displaced in phase ensure continuity of the force contact of the teeth in engagement . The gear ratio of the gear will correspond to the number of teeth of profile 1.

The gear transmission provides large gear ratios in one stage, characterized by high efficiency and high power density.

Claims (2)

1. A gear transmission containing the pinion of a composite gear with a cycloidal and circular shape of the teeth of the profiles, each of which is composed of separate gears displaced in phase relative to each other, characterized in that one of the gear profiles is formed by movably mounted on eccentric sections of the common shaft crowns made in the form of segments with a number of teeth of at least two. 2. The gear according to claim 1, characterized in that the tooth profile of the segments has a circular shape, which can be formed by bodies of revolution, for example, bearings mounted on the axles.

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