RU2479008C1 - Rotation limiter for symmetric complete revolution of rotating platform - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: at the rotation limiter for symmetric complete revolution of a rotating platform containing a fixed base and a rotating platform relative to it, which are coaxial to each other, on opposite end faces of which the limit stops interacting with each other at end rotation points are located, there introduced is an additional axis installed radially on one of the mechanism parts (for example on the base), and its limit stop is freely installed on that axis and spring-loaded with a compression spring in a radially opposite end from the working projection.

EFFECT: creation of a rotation limiter for rotation of a working element and back with mitigation of impact load on supports, which is minimum as to an axial dimension and provides the location of limit stops on a large radius.

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Description

FIELD OF THE INVENTION

The present invention relates to the field of engineering and can be used in mechanical control systems and automatic regulation.

State of the art

A known rotation limiter (see USSR AS No. 1238048, G05G 5/00), comprising a stationary cylindrical body with a longitudinal groove on the inner diameter, in which a roller with a helical groove in which the ball and stops are located is located this ball is half its diameter located in the longitudinal groove of the housing.

This mechanism has the ability to limit the angle of rotation in a very wide angular range. Its disadvantages are structural and technological difficulties in devices of large diameters with a hollow central shaft, i.e. in cases where the stops restricting the rotation need to be placed on large radii of rotation, as well as shock loads arising at the end points of the rotation when touching the hard stops.

The closest analogue (prototype) of the proposed rotation limiter for a symmetric full revolution of the turntable is the rotation limiter in a wide range of rotation angles (see the book "Mechanisms. Reference manual", S. N. Kozhevnikov et al., Fourth edition, "Engineering", 1976, Moscow, p. 581, Fig. 9.98), containing a fixed base coaxial with each other and a platform rotatable relative to it, on the opposite ends of which are fixed stops interacting with similar stops located on oih ends, at least one additional disk mounted between the base platform and coaxially to them.

This rotation limiter, despite the possibility of rotation of the platform by a full revolution, i.e. 360 °, and return to the starting position, structurally complex and has a large dimension in the axial direction due to the use of at least one intermediate disk with double-sided stops. In addition, in this mechanism, shock loads occur at the end points of rotation upon contact of the hard stops.

Disclosure of invention

The problem solved by the invention is the creation of a rotation limiter for rotation of the working body through an angle of 360 ° and vice versa with the softening of the shock load on the stops, the minimum axial dimension and the location of the stops on a large radius.

The problem is solved due to the fact that at the rotation limiter for a symmetric full revolution of the turntable, containing a fixed base coaxial to each other and a turntable relative to it, on the opposite ends of which there are stops that interact with each other at the end points of rotation, an additional axis is introduced, mounted radially on one of the parts of the mechanism (for example, on the base), and its emphasis is freely mounted on this axis and spring loaded in the radially opposite from the working protrusion to Once compression spring.

Brief Description of the Drawings

The invention is illustrated by the following examples.

Figure 1 shows the appearance of the proposed device in a perspective view; figure 2 is a section along aa in figure 1 in one of the extreme positions of the turntable; figure 3 is a section along aa in figure 1 after the rotation of the turntable 360 °.

The proposed rotation limiter for a symmetric full revolution of the turntable contains a fixed base 1 and a rotary platform 2 coaxially mounted on it with the possibility of rotation relative to it, a movable stop 3 at the end of the base and a fixed stop 4 on the rotary platform, while the stop 3 is freely mounted on the axis 5 in a collection cup 6 mounted on the housing, and this axis is located in the radial direction to the center of the base, and the radially opposite end from the working protrusion of this stop is spring-loaded 7 th compression.

The implementation of the invention

The proposed rotation limiter for a symmetric full revolution of the turntable works as follows.

When the rotary platform 2 is rotated from the extreme position (see FIG. 2) counterclockwise, the stop 4 pushes the movable stop 3 of the base 1 and rotates it on the axis 5 to the position shown in FIG. 3, thereby making a full revolution of 360 ° . With the opposite rotation of the platform 2, a similar process occurs: the position of the mechanism is shown in Fig.3.

Since in order to swing the stop 3 from one of its extreme positions to another and vice versa, it is necessary to overcome the smoothly increasing resistance of the compression spring 7 installed in the glass 6, shock loads decrease when the stops 3 and 4 come into contact with each other. The spring 7 provides a constant pressing of the stop 3 in each of its extreme positions, which eliminates its spontaneous movements and vibrations when exposed to external loads (eg, vibration, etc.) on the whole mechanism. From the attached illustrations, it is obvious that the proposed rotation limiter has a minimum axial dimension (the base and the rotary platform are located with a minimum axial clearance relative to each other), and the proposed technical solution is realizable for arranging the stops on a large radius, i.e. it is suitable for use in large products when rotating one part relative to another 360 ° in one and the opposite direction from one starting point.

Thus, on the basis of the above data, we can conclude that as a result of introducing an additional axis mounted radially on one of its parts into the known device, installing a rotary stop spring-loaded on this axis, spring-loaded at the end radially opposite from the working protrusion, a compression spring is obtained rotation for a symmetric full rotation of the turntable 360 ° in one and the opposite directions, having smaller axial dimensions, providing mitigation of impact high loads on the stops due to the location of the stops on a large radius.

Claims (1)

A rotation limiter for a symmetric full revolution of the turntable, comprising a fixed base coaxial with each other and a turntable relative to it, on the opposite ends of which there are stops interacting with each other at the end points of rotation, characterized in that it is equipped with an additional axis mounted radially on one of the parts of the mechanism, and its emphasis is freely mounted on this axis and spring-loaded in the end radially opposite from the working protrusion by a compression spring.

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