SU679749A1 - Rotation mechanism - Google Patents

Description

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The invention relates to mechanical engineering and can be used in rotation mechanisms, for example, as a rotation mechanism of a heliostat platform of a solar optical system of a furnace.

A known mechanism for rotating a crane comprises a gear mounted on a foundation (frame, carriage) and a gear coupled to it mounted in a tl rotatable gear relative to a gear. When the foundation is deformed in the mechanism of rotation of the crane, a change occurs in the relative position of the gear and gear, and their engagement is disturbed, leading to increased wear of the teeth, and, consequently, to premature failure of the mechanism.

Closest to the invention in technical terms, the effect achieved is a rotation mechanism comprising a drive, a gear with an axial bore, a gear interacting with it, connected to the drive.

a turntable, a foundation and a device for compensating for the relative displacement of the gear and gear 121.

A drive shaft or gear is included in the kinematic chain of the drive. With a flexible link, for example, a belt.

The known rotation mechanism cannot be used in high-precision devices (heliostats, telescopes, etc.), since neither the propeller shaft, nor the transmission with a flexible link included in the kinematic chain of the drive connected to the gear wheel, following the position of the gear wheel, cannot meet the requirements for the kinematic precision of the devices mentioned (the propeller shaft does not provide a stable gear ratio, and the flexible link does not provide sufficient rigidity and does not exclude a slip).

The aim of the invention is to increase the kinematic accuracy of the mechanism.

This goal is achieved by the fact that a radial slot is made in the gear wheel, and the device for compensating for the relative displacement of the gear wheel and gear is made in the form of a fixed axis and gear wheel lock installed on the base and gear suspension assembly to the platform in the form of a hollow cylinder with a flange passage through the axial bore of the gear and rigidly mounted on the platform, the fixed axis is positioned inside the hollow cylinder, connected to the latter by means of a spherical bearing, installed with the possibility of axial displacements of the platform relative to a fixed axis; My perpendicular to the axis of rotation of the wheel, and the gear wheel is rigidly connected to the drive shaft.

FIG. 1 shows a platform rotation mechanism, a general view; in fig. 2 - section A-A of FIG. one; in fig. 3 - view B of FIG. one; in fig. 4 "- section BB, 3; in fig. 5 shows a section of GGD FIG. four.

The rotation mechanism includes a gear wheel 1 with an axial bore, a gear 2 interacting with it, an actuator 3 connected to the gear wheel, a turntable 4, a foundation 5 and a device for compensating for the relative displacement of the gear wheel and gear made in the form of a gear suspension assembly to the turntable , stationary relative to the gear mounted on the foundation 5, and the latch holding the gear 1 from turning around the fixed axis 6. The suspension assembly consists of a hollow cylinder, which is fitted with an upper end on the platform 4, and a flange 8 attached to the lower end of the cylinder 7 and a gear fixing against the axial displacement, which is planted on the cylinder 7 by means of a slip bearing 9. The fixed axis 6 enters the inside of the hollow cylinder 7 and is connected to it by means of a spherical bearing 10 mounted with the possibility of axial displacement of the platform 4- relative to the fixed axis 6.

The retainer is installed in the radial slot 11, made in the gear wheel 1. The retainer includes a spherical element 12, which is freely seated on a finger 13 attached to the foundation 5. The spherical element 12 is contacted with a gear wheel 1 by means of crackers 14 with spherical response surfaces. The crackers are movably mounted in guides 15 made on the walls on both sides of the radial slot 11, due to which the spherical element 12 is fixed relative to the gear wheel 1 so that its center and the center of the spherical bearing 10 always lie on the same straight line perpendicular to the geometric axis rotation gears. One of the walls of the slot 11 is made movable. The movable wall 16 serves to sample the gaps in the wheel-to-clamp connection. Screws 17 are installed to move the wall 16 onto the wheel 1 on one side of the radial slot 11.

Drive 3 is installed on platform 4 and forms a rigid kinematic chain with gear 2 with a stable gear ratio. The bearing ring 18 is attached to the lower part of the platform, placed on the hydrostatic supports 19c flat- with “||

The rotation mechanism works as follows.

Through the channels in the liners 20, oil is supplied under pressure to their flat and spherical surfaces. In this case, between the liners 20 of the hydrostatic supports 19 and the carrier ring 18 of the platform 4, an oil onto the film is formed. When the drive 3 is turned on, the gear 2 rolls around the fixed gear 1, and the platform 4 turns. An uneven basement settlement causes the platform to tilt 4, without disturbing the bearing ring 18 on the hydrostatic supports 19, since the flat spherical liners 20 ensure its self-installation. In this case, the gearing of the gear 2 with the gear wheel 1 I is preserved, so that their mutual position is not disturbed, due to the fact that the same thing happens with the inclination of the platform. the inclination of the hollow cylinder attached to it 7.

Claims (2)

The smooth tilting of the cylinder 7 and its movement relative to the fixed axis 6 is ensured by the spherical bearing 10 and its free landing on the axis. Clamp Design Ensures that the toothed wheel 1 is locked against rotation about axis 6, not preventing it from tilting when the foundation is sinking, as the spherical element 12 can slide along the finger 13 and move with the breadcrumbs 14 in the guides 15, leaving always straight, the spherical element 12 and the spherical bearing 10 passing through the centers and perpendicular to the geometric axis of rotation of the gear wheel 1, which is necessary for the case when the tilt of the wheel 1 occurs with rotation around its center diameter passing through the center of the spherical bearing 1O and lying in the same vertical plane with the center of the spherical element 12. Increasing the kinematic accuracy of the rotation mechanism provides increased pickup accuracy of the device for which the turntable is designed. When using the rotation mechanism in solar stove heliostats, the increased accuracy of the pickup provides an increase in temperature in the region of the focal spot of the solar energy concentrator. Claims. A rotation mechanism comprising a drive, a gear with an axial bore, a gear, an associated gear connected with the drive, a turntable, a foundation and a device for compensating for the relative mixing of the gear and gear, characterized in that, in order to improve kinematic accuracy, in the gear wheel is made radial slot, and mouth-. The gear to compensate for the relative displacement of the gear and gear made in the form of a fixed axis and gear retainer mounted: on the foundation, and gear to the platform in the form of a hollow cylinder with a flange passing through the axial hole of the gear fixed on the platform , the fixed axis is located inside the hollow cylinder, connected to the latter by means of a spherical bearing, fitted with the possibility of axial displacement of the platform relative to the fixed axis The retainer is made in the form of a finger fixed on the foundation with a spherical element freely mounted on it, located in the radial slot of the gear wheel and fixed relative to it so that the centers of the gear wheel of the spherical bearing lie on the same straight line the axis of rotation of the wheel, and the gear wheel is rigidly connected to the drive shaft. Sources of information taken into account in the examination 1. I. I. Kogan. Construction tower cranes, M., Mashinostroenie, 1971, fig. 86, p. 116-117. 2. US patent number 3176533, cl. 74-421,1965. Type B " /" /five Fig.