SU1142682A1 - Device for converting rotary motion to reciprocating motion with control of travel value - Google Patents

Abstract

A DEVICE FOR THE TRANSFORMATION OF THE ROTATIONAL MOVEMENT INTO A RETURN AND TRANSFER DURING REGULATION OF THE VALUE OF THE STROKE, containing a screw. on the left .and on the right thread, directing nostji: i .iA schuyu, installed parallel to the screw, the slide with the cracker, moved. along the guides, and stops, interacting with the slider, so that, in order to expand the operational capabilities, it is equipped with springs, interacting with the slider, and a torsion spring, which is cracked and the ends of the thread interacting with the walls. the grooves, the latter is made wedge-shaped in cross section, and the cracker, in the form of a cone adjacent to the walls of the groove.

Description

The invention relates to mechanical engineering and is intended to convert rotational motion into reciprocating with the regulation of the stroke. A device for converting rotary motion into reciprocating with adjustment of the stroke size is known, which contains a screw with left and right threads, a guide mounted parallel to the screw, a slide with a breadboard moving along a guide, and stops,. interacting with the slider, the cracker is made in the form of a sector, and the thread has a trapezoidal shape fll.

The disadvantage of this device is low operational capability, due to its operation only when using a screw with a low angle of elevation, thread as; If you install a screw with a large angle of lift, then when moving the cracker from the right-hand thread to the left, the spring will be strongly bent and its ends will be at an acute angle. This can lead to seizure of the device.

The purpose of the invention is to increase operational capabilities.

This goal is achieved by the fact that a device for converting a rotational motion into a reciprocating motion with regulation of the stroke size, comprising a screw with left and right threads, a guide installed parallel to the screw, a slide with a breadboard moving along the guide, and stops interacting with the slide , is equipped with springs interacting with the slide, and a torsion spring covering the cracker and the ends of the thread groove interacting with the walls, the latter is made wedge-shaped in cross section, and dry ar - in the form of a cone adjacent to the groove walls.

FIG. 1 shows a device for converting rotary motion into reciprocating with adjustment of the stroke, the general view in FIG. 2 shows a section A-A in FIG. 1 in FIG. 3 shows a section BB in FIG. 2

The device contains a screw 1 with right and left threads, a guide made of parallel rods 2, a slider 3 with a rinse 4 mounted on it, stops 5, springs 6, and

also a torsion spring 7 abutting- with its rounded ends 8 against the walls of the threaded groove.

The spring 7 is planted on the cracker 4, which is large in the form of a cone, adjacent to the walls of the threaded groove, made wedge-shaped in cross section. The slider-3 is mounted for movement along the rods 2 parallel to the axis of the screw 1. The springs 6 are located between the stops 5 and the slider 3 and interact with the latter when the slider approaches the stops 5, which are fixed on the rods 2.

The device works as follows.

When the screw 1 rotates, the slider 3 moves along the guide rods 2 along the screw 1 due to the movement of the cracker 4 along the thread groove 4 and the ends 8 of the spring ,,. If rusk 4 moves, for example, along the right rezbeen of screw 1, it can go to the left only at the intersection of threads, when the tip of the cone rusk 4 is at the intersection point of the thinner grooves (Fig. 3). But without forced intervention, the cracker 4 will not pass from the right thread to the left, since the ends 8 of the spring 7 continue to abut against the walls of the right threaded groove (Fig. 3) and the cracker

4 will be moved smoothly along the right of thread.

When the slider 3 approaches one of the stops 5, it begins to compress the springs 6. At the moment when the tip of the cone rusks 4 is At the intersection of the peaks of the wedge-shaped threaded grooves (Fig. 3), the springs & naa1a: input cracker 4 in the left-hand thread. The rusk 4 picked up by the left thread of the screw 1 causes the slide 3 to reverse movement along the guide rods 2. In this case the ends 8 of the spring 7 are bent and jump out at the intersection of the thread grooves from the right thread to the left, the spring 7 itself turns around the crackers 4 and follows ends 8 for rusk 4 on the left thread.

To change the stroke of the reciprocating movement, the stops

5 is immobilized and fixed to rods 2. 3 The proposed device provides for reciprocating movement in screw mechanisms with a larger angle of lift, which expands its operational capabilities.

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Claims (1)

DEVICE FOR TRANSFORMING ROTARY MOTION TO RETURN-AND-SUMMARY WITH REGULATION OF THE SIZE OF THE STROKE, containing a screw with left and right threads, a guide, mounted parallel to the screw, a slider with a cracker, movable. along the guide, and stops interacting with the slider, which is connected with the fact that, in order to expand operational capabilities, it is equipped with springs interacting with the slider and a torsion spring covering the cracker and the ends of the threaded groove interacting with the walls , the latter is made wedge-shaped in cross section, and cracker, in the form of a cone adjacent to the walls of the groove.