SU811017A1 - Mechanism for converting reciprocating movement to single-direction rotation - Google Patents

Description

4 and moving in fixed guides 5.

The bearings 2 have a shaft 6 on which the gears 7 and 8 rotate freely, separated by a ring 9, and on which are mounted the pawls 10 which sit on the axles 11 and transmit the rotation to the rotating shaft b. On the shaft 6, the ratchet wheel 12 and the ratchet wheel 13 are rigidly fixed, the tooth of which is oppositely directed to the tooth of the ratchet wheel 12. On the case 1, the stops i4 and the stops 15 are fixed, rocking in the plane of the ends of the gear wheels 7 and 8 by means of springs 1b and screws 17. Dogs 18 are also mounted on gears 7 and 8, which provide a rigid kinematic connection between shaft 6 and gear wheels 7 and 8, which sit on axles 19 and are made in the form of two shoulders.

The dogs 18 and the stops 15 have inclined surfaces, as a result of the interaction of which the dogs 18 compress the springs 16, turn the stops 15 and set under them.

The proposed mechanism is intended for the case when it is required to turn the shaft by 180 ° in one turn of the rails.

The mechanism works as follows. The slats 3 with straps 4 move reciprocally between strictly fixed extreme positions in the fixed guides 5.

When the rails 3 move, the gears 7 and 8 rotate in opposite directions and one of them transfers the rotation to the shaft 6, and the other idle rotates to the shaft.

At the extreme positions of the rails 3, the gear wheels 7 and 8 are arranged differently with respect to the ratchet wheels L2 and 13: the gear wheel 7, which has already completed the transmission of rotation to the shaft 6 during the previous course of the rails 3 and which during the next course rotates idle relative to the shaft b, is in such a position relative to the ratchet wheel 12, that the paws 10 and 18, which are on it, tightly fit with the ratchet wheel 12. The gear wheel 8, which during the next run of the rails 3 will transmit the shaft 6, is rotated by a small angle in the direction,a counter-rotational direction of rotation of the shaft 6 with respect to the position when the pawls 10 and 18 located on it are tightly engaged with the ratchet wheel 13, and the pawl 18 is completely removed from its position as a result of interaction with the stop 14.

Such a mutual arrangement of the dogs and the ratchet wheel is achieved by establishing the necessary extreme positions of the rails and at the beginning of movement provides some idle stroke, and the shaft does not rotate.

When moving the rails 3 down and the following occurs. The dog 10, located on the gear wheel 7, which rotates down on the shaft 6 idle during the movement of the rails 3, goes out of the groove of the ratchet wheel 12 and slips through it (in Figs 1, 3 the mechanism with the extreme upper position of the rails is shown). At the extreme lower position of the rails 3, the pawl 10 dog falls into the groove, but already with some overrun, as the gear wheel 7, on which it is located, rotates relative to the shaft 6 by an angle somewhat greater than 360 °: turning the wheel 7 when the rails 3 are idling

plus shaft 6 by 180 ° in the direction of its rotation, plus turning the wheel 7, idling, pa 180 ° in the opposite direction. This overrun will ensure idling at the beginning of the movement.

up.

The dog 18, located on the gear wheel 7, rotating on the shaft 6 idle, at the beginning of movement interacts with the stop 15, turns on its axis

10 and comes out of the hook with the ratchet wheel 12, which becomes possible due to the presence of idling. Upon further rotation, the pawl 18 jumps out from under the anvil 15 and presses against the ratchet wheel 12 with spring 19, but no longer gets into the groove of the ratchet wheel 12, since the gear wheel 7, on which it is located, has turned relative to the shaft. At the approach of the rails 3 to the bottommost

The dog 18, interacting with the support 14, is retracted from the storage wheel 12 and the PS engages with it, which is necessary for the dog 10 located on the same wheel to cross over from the slope of the ratchet wheel into which the opa falls.

The gear wheel 8, transmitting to the shaft 6 the rotation of the shaft and the movement of the rails 3 downward, rotates idly at the beginning of the movement.

The dog 10, located on it, after the dog 18, located on the gear wheel 7, has come out of the engagement with the ratchet wheel 12, enters the tight trap with the ratchet wheel 13 and transmits the rotation to the extreme lower iologeii of the rails to the shaft 6.

Dog 18, located on the same gear wheel 8, at the beginning of the movement of the rails 3 moves down from the stop 14 and the spring 19

enters into engagement with the ratchet wheel 13. At the end of the movement of the rails 3 down, the dog 18 interacts with an inclined surface with the stop 15, compresses the spring 16, turns the stop 15 and goes under

him.

When the rails 3 move upward, the gears 7 and 8 change the direction of their rotation, and the dogs 10 and 18 located on the gear wheel 8 accomplish

the same process as the dogs 10, 18, located on the gear wheel 7 when the rails 3 move down.

Since the gears 7, 8 transmit the rotation to the shaft 6 alternately, and when the direction of movement of the rails 3 is changed, they also change the direction of their rotation, the direction of rotation of the shaft 6 remains constant.

The use of the invention in an apparatus for applying a pattern to boards using an offset printing method will improve the accuracy and quality of the applied pattern.

Claims (2)

1. The UK patent number 1336750. cl. F2Q, 1971. 2. Artobolevsky I.I. Mechanisms in modern technology, vol. P1. M., "Science, 1973, p. 48 (prototype). A-l 1 9 P 6 FIG. 2 -YU .З