SU1221415A1 - Mechanism for converting reciprocating-to-rotary motion - Google Patents

Description

The invention relates to mechanical engineering, in particular to mechanical transmissions of converting one type of movement to another, and can be used as a device for removing waste from the stamping area.

The purpose of the invention is to increase the durability of the mechanism by reducing chain wear.

FIG. 1 shows the proposed mechanism, a general view; in fig. 2 is the same, side view, in FIG. 3 - position of the slider when the carriage moves down; in fig. 4 — node 1 in FIG. 3; in fig. 5 shows the position of the slider when the carriage moves upwards; in FIG. 6 is a section A-A in FIG.

The mechanism for converting a reciprocating movement into a rotational movement includes a housing 1, a driven member in the form of two asterisks 2 and 3 of equal diameter, mounted on the housing 1 ,. and the enclosed chain covering them 4. The leading link of the bottom of the mechanism is made in the form of a carriage 5, in which a slider b is installed, having a length equal to the pitch diameter of sprockets 2 and 3. Co-braces are made in the form of fixed at the ends of the slider 6 wedge teeth 7. One of the sides A of each wedge tooth 7 is perpendicular to the centerline of chain 4, and the other side B is parallel to the identical side B of the other wedge tooth 7. In addition, the carriage 5 is provided with limiters 8 of the chain deviation. wedge teeth 7. To adjust the tension of the chain 4 there is a tension device 9.

The mechanism works as follows.

Using tensioner 9, chain 4 is pretensioned.

In the process of operation of the mechanism, the carriage 5 can occupy strictly defined2214152

extreme positions. The magnitude of the stroke of the carriage 5 depends on the stroke pr | Ivod, which is selected in each case and is determined as follows:

H

t P,

where H is the drive stroke;

t is the chain pitch;

n is an integer. The carriage 5 is said to reciprocate from a drive (not shown).

When moving the carriage 5 down

(Fig. 3) the slider 6, which is in engagement (due to the wedge tooth 7) from one of the branches of the chain 4, moves it. When this roller chain 4

placed in the recess d (fig. 4) on the surface of the wedge tooth 7 and securely held in engagement. The movement of chain 4 is transmitted to sprockets 2 and 3 and causes them to rotate,

Income to the extreme position, the carriage 5 changes the direction of movement. At this time, the chain 4 is stationary and the sprockets 2 and 3 do not rotate.

When the carriage 5 moves upwards (FIG. 5), the wedge tooth 7 of the slider 6 abuts the beveled side B into the roller of the chain 4 and is pushed in the opposite direction, the entrance of the wedge tooth 7 into engagement with the second branch of the chain 4. In this case, the chain 4 does not deflect sideways and reliably pushing the slider 6, it rests against the stops 8. With the further movement of the carriage 5, the wedge tooth 7 of the slider 6 moves the chain 4, fy to the rotation of the sprocket 2 and 3.

Since the wedge teeth 7 interact with the closed circuit 4 alternately, they move it in one direction, as a result of which the driven shaft of the sprocket 2 rotates in one direction.

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f | / ". 2

fig.Z

fpu9. H

(Pus. 5

Claims (1)

MECHANISM FOR CONVERSION OF RETURN-SENDING MOTION TO ROTARY, containing a housing, a driving link in the form of a carriage with dogs attached thereto, a driven link in the form of two stars of equal diameter, mounted on the housing, and covering them with a closed chain interacting with branches with dogs, characterized in that that, in order to increase durability by reducing chain wear, the mechanism is equipped with chain deflectors and a spider installed in the carriage, the length of which is equal to the diameter of the pitch circle of the star k, and the dogs are made in the form of wedge teeth fixed to the ends of the crawler, one of whose sides is perpendicular to the center line of the chain, and the other side is parallel to the identical side of the other tooth. L 221415