SU796576A1 - Intermittent movement mechanism - Google Patents

Description

one

The invention relates to mechanical engineering, namely to mechanical devices of periodic rotation, when the law of motion of the slave link is not significant.

Known ratchet push-button mechanism that contains a turning device, the slave link of which is made in the form of a ratchet wheel with a square link fixed on it, which rotates around a fixed axis under the action of a spring-loaded dog connected to a reciprocating button, and the square link is fixed by means of two plate-shaped springs 1.

However, this mechanism has limited functionality. The closest to the proposed one is the intermittent motion mechanism, which contains a lead link, made in the form of a rack, performing reciprocating motion, a follower link, made in the form of a head mounted on the lead link, with the possibility of relative rotation of the head with stops, in particular, a ratchet wheel with studs placed on it, which interact during reciprocating movement with a fixed spring-loaded stop, the cat ing is simultaneously fixing node 2.

The disadvantages of this intermittent motion mechanism are the limitations of its functionality due to the lack of independence of direction.

rotation of the driven link-head with stops (ratchet wheel with studs) when changing the direction of movement of the drive reciprocating movement, since the rotation

the slave link is performed only when moving in one direction, for example, from left to right, and the complexity of the design of the mechanism. The purpose of the invention is expansion.

the functionality of the mechanism by ensuring the independence of the rotation of the slave link at a given angle in one direction from the direction and length of the movement of the drive

reciprocating and simplifying the design of the mechanism.

The goal is achieved by the fact that the intermittent motion mechanism contains a leading link, made in the form of a rack performing a reciprocating motion, and a driven link in the form of mounted on the leading link with the possibility of relative rotation of the head with stops that interact when the driving link moves with a fixed stop , is provided with an additional fixed stop, and the stops of the head are placed symmetrically relative to the plane of its rotation and alternately interact with one of the fixed stops.

FIG. Figure 1 shows the proposed intermittent motion mechanism, a general view; in fig. 2 - the position of the described mechanism before the interaction of the slave link with the emphasis when moving to the right in FIG. 3 is a top view of FIG. 2

The intermittent motion mechanism contains a leading link, made in the form of a stand 1, a driven link, made in the form of a head 2 on the link link with stops 3 and 4 which are located in two parallel planes of the head 2 symmetrically with its plane of rotation, two fixed stops 5 and 6 and a horizontal fixed guide 7 of a reciprocating drive. The fixing unit is made in the form of a ball spring retainer 8, interacting with the grooves 9 of the head 2

The leading link-rack 1 reciprocates, the driven link-head 2 with stops 3 and 4 is installed on the leading link with the possibility of relative rotation at a given angle, and stops 3 and 4 of head 2 alternately interact with the corresponding fixed stops 5 or b when moving the driving member along a fixed guide 7.

The intermittent motion mechanism works as follows.

During the movement of the rack 1 with the head and the stops 3 and 4, for example, from left to right, along the horizontal fixed guide 7 from the reciprocating drive, the stop 3 of the same plane of the head 2, passed without interaction the fixed stop 5, approaches the second fixed stop Beating the result of the interaction of the stop 3 with the fixed stop b, upon further movement of the rack 1, the head 2 is rotated counterclockwise by the angle of displacement of the stops 3 and 4 of the two planes of the head 2 - the angle oL. During the reverse movement of the rack 1, for example, from right to left, as a result of the interaction of the stop 4 of another plane of the head 2 with the fixed stop 5, the head 2 will be rotated by another angle oL in the same direction, i.e. counter-clockwise

arrows. The total angle of rotation of the mechanism depends on the number of longitudinal moves of the rack 1 in the area between the fixed stops 5 and b.

The angle of rotation of the mechanism is determined by the constructive implementation of the driven link, in particular, the angle of displacement between the stops located in two parallel planes of the head.

In turn, the angle of displacement of the head stops is determined by the frequency of rotation, the number of stops on one plane of the head, placed on a part of the circle equal to the frequency of rotation, and the parity condition 5 (multiplicity of two) on the number of stops placed in two planes of the head, which follows from the presence of two fixed stops, interacting with the stops of the head. 0 For the proposed intermittent motion mechanism, the slave unit of which is made with pairs symmetrically located relative to the center of rotation of the head stops, the frequency of the mechanism rotation is 180.

To ensure a periodic rotation from the interaction of the stops of the head with the fixed stops to the constructive implementation of the fixed stops, they are required to be placed in the corresponding

planes for placing the stops of the head, and also symmetrically with respect to the plane of rotation of the head.

Claims (2)

1.Artobolevsky I.I. Mechanisms in modern technology, t. M., Q Science, 1973, p. 331, FIG. 413 2. Jones F.L. and Horton H.L. Mechanisms of automatic action, M., Mashgiz, 1961, p. 251-252, FIG. 188 (prototype). 7X //// XX X //,