SU1414747A1 - Load-handling arrangement - Google Patents

Abstract

This invention relates to a lifting machinery industry, in particular to devices equipped with a catching mechanism. The purpose of the invention is to increase reliability by reducing the stopping distance of the device in an emergency. The device comprises a load-carrying element 1, on which an inclined support 2 is mounted, in the slots of which a roller is mounted. The element 1 is also mounted in bearings 7 and 8 of a screw bearing consisting of a nut 5 and a screw 6. A stop 11 of a nut enters a guide groove preventing the rotation of the nut 5, another stop is connected to a roller cooperating with an inclined stop 2 , moreover, the tangent of the angle of the stop 2 is equal to the ratio of the stroke of the screw 6 to the diameter of the pitch circle of the sprocket. When the chain 10 is broken, the sprocket stops, the roller stops moving along the stop 2, and consequently, of the element 1. 5 Il.

Description

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FIELD OF THE INVENTION The invention relates to a lifting and transport machinery industry, in particular to devices equipped with a catching mechanism.

The purpose of the invention is to increase reliability by reducing the stopping distance of the device in an emergency. : FIG. 1 shows the proposed device, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. one; in fig. 4 shows a section BB in FIG. 3; in fig. 5 — node II in FIG. four.

The device contains a load-carrying element fvieHT 1 associated with the drive of its displacement. On the load-carrying element 1 mouth

nuts 5. The tangent of the angle of inclination a of the stop 2 must be equal to the ratio of the stroke of the screw 6 to the diameter of the dividing circle of the sprocket 9.

If this condition is not fulfilled, the lifting mechanism is jammed due to the fact that the movement of the nut 5 advances the movement of the stop 2 or the lagging of the nut 5 from the movement of the inclined support 2 occurs.

When the chain 10 is broken, located, for example, between section 14 and element 1, the sprocket 9 stops. Therefore, movement of the rolling roller 4 with the bearing pin 3 stops.

Uvlen inclined stop 2, in the slots of which .g. nuts 5 horizontally. The stop is replaced by the finger 3 with the rolling role-2 of the element 1 rests on the rolling

4 and screw pair, consisting of guy-AI 5 and screw 6, bearing supports 7 and 8 for screw 6, on the axis of roller 4, set the roller 4, movement of element 1 stops. In the event of an open circuit 10 between sections 13 and 14, the chain 10 is dropped from the sprocket 9 due to the fact that

A drive chain 10 connected to the t-20 increases the tension of the internal chain 10: a winch cable. Stop 11 nuts 5 (between section 14 and element 1) ele on sprocket 9 with a cropped tooth, a depth of 25

: enters guide groove 12, which prevents the nut from rotating, providing longitudinal movement along the axis: Screw 6. The device contains a stationary section 13 and a movable guide section 14. On section 13 there is a winch 15 with cable drum, which is connected to the chain 10.

The device works as follows. Rotating the handle of the winch 15 o in the direction of lifting, the rope connected to the chain 10 drives the sprocket 9 of the trapping mechanism in rotation and pushes it towards-; governing section 14, which, in turn, ejects the load-carrying element 1, since the rope is packaged on the fixed section 13. Lowering the elevator takes place in the reverse order.

Getting rotational movement through the sprocket 9, the screw 6 moves the nut 5 (when lifting to the right, when lowering the lift - to the left). The nut 5 is connected with a roller 40, which rolls in when raising and lowering an inclined support 2, which is in constant contact with roller 4

Step 1 stops.

Claims (1)

Invention Formula A lifting-transporting device containing a load-carrying element, kinematically connected to the drive, and a catching mechanism, characterized in that, in order to increase reliability by reducing the braking distance in an emergency situation, it is equipped with an inclined stop and a roller mounted in its grooves, while the kinematic the link is a chain transmission, and the catching mechanism includes a screw pair mounted on the load-carrying element, and on the nut of the screw pair there are protrusions, one of which is another longitudinal groove is made in the longitudinal groove made on the load-carrying element, and another protrusion is connected to the roller, the tangent of the angle of inclination being equal to the ratio of the stroke of the screw to the pitch diameter of the sprocket of the chain transmission. nuts 5. The tangent of the angle of inclination a of the stop 2 must be equal to the ratio of the stroke of the screw 6 to the diameter of the dividing circle of the sprocket 9. If this condition is not fulfilled, the lifting mechanism is jammed due to the fact that the movement of the nut 5 advances the movement of the stop 2 or the lagging of the nut 5 from the movement of the inclined support 2 occurs. When the chain 10 is broken, located, for example, between section 14 and element 1, the sprocket 9 stops. Therefore, movement of the rolling roller 4 with the bearing pin 3 stops. g. nuts 5 horizontally. The stop 2 of the element 1 rests on the running Step 1 stops. five about g 0 Invention Formula A lifting-transporting device containing a load-carrying element, kinematically connected to the drive, and a catching mechanism, characterized in that, in order to increase reliability by reducing the braking distance in an emergency situation, it is equipped with an inclined stop and a roller mounted in its grooves, while the kinematic the link is a chain transmission, and the catching mechanism includes a screw pair mounted on the load-carrying element, and on the nut of the screw pair there are protrusions, one of which is another longitudinal groove is made in the longitudinal groove made on the load-carrying element, and another protrusion is connected to the roller, the tangent of the angle of inclination being equal to the ratio of the stroke of the screw to the pitch diameter of the chain sprocket. 15 15 ag one / I - / I fas. 2 Feed FIG. five