SU1703902A1 - Planetary precision transmission with taking up clearance - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in drives for industrial robots. The aim of the invention is to increase reliability and reduce axial envelope. The planetary precession gear includes a housing 1 with input 4 and output 2 shafts mounted on bearings, a two-crown satellite 7 mounted on hub 8 and engaging with a bevel wheel 11. Cam disc 12 coupled with counter cams made at the end of a stationary gear wheel 11, Under the action of an elastic element installed in the recess of the housing and in the slot of the disk 12, the cam disk 12 rotates when the cams of the disk 12 interact with the cams of the stationary conical wheel 11 is displaced axially towards the conical wheel, selecting backlash in gearing. 3 il.

Description

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The invention relates to mechanical engineering and can be used as a reducer for drives for industrial robots.

The aim of the invention is to increase reliability and reduce axial envelope.

FIG. 1 depicts the proposed planetary precession transmission; in fig. 2 shows section A-A in FIG. one; in fig. 3 - scan the contact surface of the cam disc and a stationary gear.

The planetary precession gear comprises a housing 1. in which an output shaft 2 is mounted on a radial-stop bearing 3, an input shaft 4 on a radial-stop bearing 5 mounted in the housing 1, and on a bearing b mounted in the output shaft 2. The input shaft 4 is mounted in supports 5 and b with the possibility

small axial displacement to compensate for gaps in gears. Dvuhventsovy satellite 7 is installed on the carrier. made in the form of a crank sleeve 8. placed on a bearing support 9. A bevel wheel 10 is connected to an output shaft 2. A bevel wheel 11 is fixedly mounted in case 1. The cam coupling has a cam disc 12 placed between the stationary bevel wheel 11 and the housing 1 and Zannaya with the last elastic element 13, located in the recess of the housing 1 and in the slot of the disk 12. The elastic element 13 rotates the cam disk 12 relative to the housing 1. The cam jaws of the cam clutch are made on the face facing the disk 12 The new side of the fixed bevel wheel 11. To avoid jamming of the gear, the cam lift angle is larger

self-locking angle and is 12 ... 20 ° (Fig. 3).

To prevent rotation and to provide SPECIAL compliance (small movement in the axial direction), the housing 1 and the bevel wheel 11 are connected by a diaphragm 14.

Planetary precession transfer works as follows.

An input shaft 4 with a crank sleeve 8 drives a twin-tail satellite 7, which, during its movement, rolls around the bevel wheel 10 of the output shaft 2 and the fixed bevel wheel 11. If there are gaps in the gear under the action of an elastic element 13 that is in a compressed state The cam disk 12 rotates. When the cams of the disk 12 interact with the cams of the stationary bevel wheel 11, the latter is displaced axially in the direction of the bevel wheel. Aperture 14

provides the conical wheel 11 in the axial direction and at the same time fixes it from turning relative to the body 1. 5 FORMULA AND SECURITY

Planetary precession transmission with a clearance gap, comprising a housing, an input and output shafts accommodated therein,

0 dye of a bevel wheel, one of which is motionless, a carrier connected to the input shaft, a satellite mounted on it for interaction with bevel wheels, a cam clutch and an elastic element, which is designed to increase reliability and axial clearance, the transmission is equipped with a diaphragm connecting the stationary bevel wheel to the housing, the cam clutch is placed

0 between the latter and is connected to the housing by an elastic element / and the second bevel wheel is connected to the output shaft.

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FIG. 2

Claims (1)

5 FORMULA AND PORTRAIT A planetary precession gear with a clearance selection, comprising a housing, input and output shafts located in it, two conical wheels, one of which is stationary, a carrier connected to the input shaft, a satellite mounted on it for interaction with conical wheels, a cam clutch and an elastic element, characterized in that, in order to increase reliability and reduce the axial dimension, the transmission is equipped with a diaphragm connecting the fixed bevel wheel to the housing, a cam clutch is located between the last ^ and connected to the housing elastic element? and the second conical wheel is connected with the output shaft. Fig.Z