SU1490353A1 - Worm drive - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in worm gears. The purpose of the invention is to improve the transmission accuracy by providing a sample of the gap in the worm gearing. To obtain a positive worm gear, there is a device for simultaneous reversal of eccentric sleeves 5 and 6, one of which contains a worm with supports, and the other is mounted concentrically. When adjusting the gap in the worm gear, a straight-line movement of the worm 2 takes place with supports while simultaneously rotating the eccentric bushings 5 and 6 without changing the angular displacement of the symmetry axes of the worm gear 2 of the worm gear 3. By means of an angular displacement sensor, an automatic change of the positions of the engine housing 11 and the angular displacement sensor housing is provided. 1 hp f-ly, 5 ill.

Description

The invention relates to mechanical engineering and can be used in worm gears and other gears to control the relative position of the axes of the elements during their assembly, repair and operation.

The purpose of the invention is to improve the transmission accuracy by providing a sample of the gap in the worm gearing.

Fig. I is a worm gear with a device for adjusting the clearance, view; FIG. 2 is a section A-A on, 1; FIG. 3 shows a section B-B on (} ig, 1; FIG. 4 shows a section B-B on 4ig, 2; FIG. 5 - a computational-graphical diagram of the axis of the screw.

The transmission includes a housing 1, mounted on it with supports a worm to 2 with a shaft, an internal worm gear 3 interacting with it with an output shaft 4, a device for adjusting the gap, made in the form of two eccentric bushings 5 and 6, installed with the possibility of rigid fixation relative to the housing 1, for example, with terminal clips 7, 8 and a bolt 9, the first eccentric sleeve 5 covers the worm to 2 with supports, and the second 6 is installed eccentrically. The transmission also contains an additional output shaft 10, mounted coaxially with the screw shaft 2 and rigidly connected with it, the motor 11, the casing of which is rigidly connected to the first eccentric bushing 5, and the motor shaft is kinematically connected to the screw shaft 2, the sensor 12 angular displacements, the movable element of which is associated with a flywheel 13 mounted on an additional output shaft 10, and the sensor housing 12 is rigidly connected by means of a bracket 14 to a first eccentric bushing 5, a device for simultaneously turning the eccentric bushings 5 and 6, rigidly connected by means of a bracket 15 to the housing 1 of the worm gear (see FIG, 1, 2, 3, 4), the device is made in the form of a screw 16 with left and right thread sections, crackers 17 and 18 with fingers 19 and 20 installed on the rolling pins 21, 22 and on the corresponding sections of the screw 16 intended to interact with the corresponding eccentric sleeves 5 and 6,

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Worm gear with a device for adjusting the clearance works as follows

In order to adjust the gap in the worm gearing during the operation of the transmission, they unclench the terminal clutches} 1 7 and 8, rotating the screw 16 simultaneously move

Q rusk 18 with finger 20 and rusk 17 with finger 19 in opposite directions, which leads to simultaneous reciprocal rotation of eccentric bushings 5 and 6 in opposite directions with different angular speed depending on the distance a and b from the axis O 2 to the axes of the fingers 19 and 20 (cm, 3), thereby moving the axis of symmetry of the worm 2 relative to the axis of symmetry of the worm gear 3 and adjusting the clearance of the worm gear, the linearity of movement of the worm 2 in the plane of rotation of the worm gear 3 the outcome of the law (with + e). cos (f, cm, fig. 5, where. h, is the displacement of the biscuit 18 down; h 2 — the displacement of the biscuit 17 upwards; al is the angle of rotation of the eccentric bushing 6 from the influence of the biscuit 17 through the finger 19; jp is the angle of rotation eccentric sleeve 5 from the impact of cracker 18 through the finger 20; e, - eccentricity of the pc1 position of the screw 2 relative to the eccentric sleeve 5; e - eccentricity of the location of the screw 2 relative to the eccentric sleeve 6 in the initial position of the mechanism; - eccentricity of the sleeve 6; a - distance from the axis of the eccentric bushing 6 to the direction of movement of the cracker 18; DRA from the axis of the eccentric bushing 6 to the direction of movement

5 crackers 17; 00 is the distance from the axis of the eccentric bushing 6 to the direction of movement of the worm 2 along the X coordinate,

After obtaining the allowable clearance in the worm gearing, the terminal clamp 7 is clamped at the top, and the terminal clamp 8 - at the bottom to maintain the mutual geometrical arrangement of the worm 2 and the worm gear 3. This adjustment automatically changes the position of the engine 11, whose body is rigidly connected eccentric bushing 5, Use in this design

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the flywheel 13 allows you to manually determine the additional angular play of the gear, turning it into the cut side of the display with a fixed output shaft f,

Claims (2)

Invention Formula 1, a worm gear, comprising a casing mounted on a screw cage with a shaft, a worm wheel interacting with it with an output shaft, and a device for adjusting the gap, made in the form of two eccentric bushings that are rigidly fixed relative to the casing, moreover, the first of them covers the worm with supports, and the second is installed eccentrically, characterized in that, in order to improve the accuracy of transmission, it is equipped with an engine, the casing of which is rigidly connected to the first eccentric bushing, and the shaft vigatel ka, an additional output shaft mounted coaxially with the screw shaft and rigidly connected with it, an angular displacement sensor, the movable element of which is connected with the additional output shaft, and the housing is rigidly connected with the first eccentric bushing, and a device for simultaneous rotation of the eccentric bushings, made in the form of a screw that is rigidly connected to the casing with left and right thread sections and two crackers with fingers mounted on the respective screw sections and designed to interact with the corresponding eccentric bushings, 2. Transfer by p. about tl and h so that it is equipped with a flywheel mounted on an additional output shaft between the worm shaft and the moving element of the sensor of angular movements and interactions kinematically connected with the shaft of the worm - 25 that is associated with them, A a FIG. 2 20 19 .8 FIG.