SU1353714A1 - Load-engaging device - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hoisting and transport machinery. The aim of the invention is to simplify the design. A load gripping device comprising a carrier frame 1 with hinged arms on it with gripping levers 4 and 5. The mechanism for controlling the gripping levers 4 and 5 includes a crankshaft mounted on frame 1 with two diametrically opposed knees on which connecting rods are hinged to the upper arms gripping levers 4 and 5. A mechanism for fixing the position of the levers, which includes attached to the ends of the crankshaft in the plane, is kinematically connected with the gripping levers mechanism. intensity perpendicular to the plane of the knees of the shaft, two forks with rods 15 attached to their ends, placed in the same plane, and counterweights 16, mounted on the rods 15 with the possibility of longitudinal movement. Counterbalances can be made adjustable according to the torque they generate. 4 il. about sl 21 so sl

Description

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BACKGROUND OF THE INVENTION The invention relates to load gripping devices designed primarily for unit loads.

The aim of the invention is to simplify the design of the device.

Fig, 1 shows the proposed device, a general view; in fig. 2 is a section A-A in FIG. 1; in fig. 3 - the scheme of operation of the device, the levers are reduced; Fig, 4 - the same, levers divorced.

The load gripping device contains a carrier frame 1, on which axle two shoulders 4 and 5 are pivotally mounted on axles 2 and 3. The control mechanism of the latter is a crankshaft 6 mounted in the subshapes 7 mounted on frame 1, on diametrically placed knees 8 and 9 of the crankshaft 6 are installed with connecting rods 10 and 11, each of which is pivotally connected to the shoulder of the corresponding beam 4 or. The gear wheel 12 and the torque transmission mechanism 13 in one direction are also mounted on the crankshaft 6. A device for fixing the position of the levers 4 and 5 includes fastened at the ends of the crankshaft 6 in a plane, perpendicular to the plane of the knees 8, and 9 of this shaft, two forks 14 with rods 15 attached to their ends located in the same plane and counterweights 16 mounted on the rods 15 with the possibility of longitudinal movement along the latter. The counterweight 16 can be made adjustable in terms of the torque generated by it (type-setting, hollow, filled with fluid medium, with a variable arm).

The load gripping device includes springs 17 ti 18, springs, mounted on a supporting frame 1 and connected to a support bar 19. A rack 20, which cooperates with a gear wheel 12, is fixed on one of these joints.

Guides 21 are mounted on the carrier frame 1, and rollers 22 are mounted on the chains 18 for engagement with the guides 21. Top 23 and 4 lower stops are also mounted on frame 1.

The device works as follows.

0

five

0

five

7

0

five

 the starting position of the gripping levers 4 and 5 are divorced (Fig. 4). The device is installed above the product. The support bar 19 is at the top of the product, the counterweight 16 is in the lower position. Crankshaft 6 is fixed.

In the working position the device is lowered onto the product. In this way, the support bar 19 abuts against the outer surface of the product. Directing to cue 21 move together with frame 1 relative to tg 18 and rollers 22, compressing the spring 17 to the upper stops 23, the gear wheel 12 mounted on the crankshaft 6, rolling on the rail 20 connected to the pull 18, turns the crankshaft through the torque transmission mechanism 13 in one direction by 180, the Elbows 8 and 9 of the crankshaft 6 are rotated 180 °, thus occupying the leftmost and respectively rightmost position. As a result, the connecting rods 10 and 11, which turn the gripping levers 4 and 5 relative to the axes 2 and 3, close the levers.

The forks 14 fastened at the ends of the crankshaft 6 with the rods 15 also rotate 180, while the counterweight 16, moving along the rod 15, occupies the lower position. This question can be implemented if the condition written in approximate form is fulfilled without taking into account the friction forces (Fig. 4)

40

Q-a /

Q 1 + 2Q b.

five

0

five

where Q is the weight of the device;

O is the weight of the counterweight;

 weight of levers;

a is the radius of the gear;

1-- shoulder barbell;

b - distance from the center of the body

to their axis of rotation. The crankshaft is fixed. When the device is raised, the gear wheel 12, rolling on the rail 20 and interacting with the mechanism 13, does not transmit the torque to the crankshaft 6, i.e., it rotates relative to it. The springs 17 move the support bar 19 and the gi 18 to the lower stops 24 and occupy the initial position (Fig. 3).

313537

Further, the operation of the device occurs in reverse order.

Claims (1)

Invention Formula A load gripping device containing a carrier frame with hinged pins attached to it and a mechanism for controlling and fixing the latter, including a crankshaft with two diametrically arranged knees fixed on the frame. 14 on which rods are mounted that are hingedly connected with gripping levers, characterized in that, in order to simplify the construction, each end of the crankshaft in a plane parallel to the plane of rotation of the gripping levers is complete with a fork, to the ends of which a bar is attached with the possibility of longitudinal movement of the counterweight. rig „/ i / /; // aJ Editor O. Yurkovetska Order 5661 / 20Type 791gg  1irage / 1Subscribe YNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5    .- .- “-.“ „ Production and printing company, Uzhgorod, st. Project, 4 Fy Compiled by O. Fotinich Tehred And, Veres Proofreader V. Booth ha