SU895896A1 - Single rope grab bucket - Google Patents

Description

(54) SINGLE-GRIP GRAPE

one

The invention relates to lifting equipment, in particular to single-line grabs.

A single-cable grab is known, which contains a movable and stationary crosshead, jaws connected to a movable crosshead by means of a cable attached to a movable crossbar for hooking the lifting mechanism and fixing the jaws in the closed position 1.

The disadvantages of the well-known grapple are the complexity of the design and the need for careful balancing during pick-up.

. The purpose of the invention is to simplify the design and increase reliability.

The goal is achieved by the fact that the grapple is equipped with a bracket rigidly attached to a fixed crossbar, to which a movable crossbar is attached pivotally at its one end, while the rods are made flexible and attached to the other end of the movable crossbar.

FIG. 1 shows a grab, general view; in fig. 2 - the sequence of the detachable lock.

The single-cable grab contains jaws 1 and 2 suspended on hinges 3 and cargo bar 4. A feed traverse 5 is installed along the jaw connector, one end through an axis 6 pivotally connected to a bracket 7 fixed on the cargo bar 4, and the other end through a beam 8 flexible rods 9 - with jaws 1 and 2. In the middle part of the yoke 5, it is provided with an eye 10 for attaching a grapple to a hook of a crane. On the falling traverse 5 and the cargo bar 4 are installed respectively movable 11 and fixed 12 parts of the interlocking lock 13. The mobile part And the detachable lock consists of a rotary cam 14 and coaxially mounted with it

15 of the orienting disk 15, with four fingers fixedly fixed thereto 16. Located on the cargo bar, the fixed part 12 of the detachable lock consists of the grip 17 and the pawl 18. For synchronizing the rotation of the jaws, they are connected to each other by a bar 19.

The grapple is hung on the hook of the lifting means by the eyelet 1. When the feed condition is open

the yoke 5 and the cargo bar 4 the yoke 5 is in the upper position, the jaws 1 and 2 are open, which is provided by the weight of the cargo bar 4. The weight of the cargo bar is selected from the following ratio K-B-Q G -a,

where K is a coefficient depending on the ratio of the arms of the traverse 5, one of which is the distance from axis 6 to eyelet 10, the other from axis 6 to rocker arm 8;

GI is the mass of the cargo bar;

GJ is the reduced mass of the jaws;

b is the closest distance from hinge 3 to ti g 9;

a is the distance from the hinge 3 to the center of the body of the corresponding jaw.

The mechanism for opening and closing the grab works as follows.

In the open position, the grapple is lowered onto the material to be captured. After

the stop of the opened jaws 1 and 2 into the material of the crane hook, continuing downward movement, lowers the falling yoke 5, at the end of the stroke of which one of the fingers 16 will abut the folding dog 18. As a result, the cam 14, which is already inside the gripper 17, rotates 90 ° and takes a position close to the horizontal, i.e. is closed inside the grip 17. The falling traverse, being in the lower position, is rigidly connected to the cargo bar 4.

When lifting the grapple beyond the eyebol, the jaws 10 close under their own weight by engaging the bulk material.

When the grab is locked against the material and the subsequent course of the falling cross beam 5, the cam 14 is rotated by 90 ° inside the gripper 17. The cam 14 is in a position close to vertical, and does not prevent the lifting cross bar from raising to the beam 4 during the subsequent lifting crane hooks. Cargo bar 4 after tensioning flexible t g 9 under the action of its own weight, will open the jaws.

The simplicity of the grab design significantly reduces the cost of its manufacture. The proposed grab is reliable in operation and durable in operation and does not require special care.

Claims (1)

1. Tauber B. A. Grab mechanisms. M., 1967, p. 28, Fig. ten. SP 3 at. (Rig.y.