RU2235671C1 - Tie-rod with locking device - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to load-gripping devices designed for lifting and turning over large-size and heavy-weight loads. Proposed tie-rod consists of body and locking device. Tie-rod body is connected by one end to sling of crossmember, and hole with recess is provided on other end. Hole of body is fitted on ring journal with bead, and when sling with tie-rod is lifted by crane, recess in lower part of body hole comes in contact with seat spherical surface of rigging journal of load, thus forming spherical joint. Locking device includes bracket with safety pin which can be fitted in two positions, namely, lowered down and preventing getting of load rigging journal from hole of tie-rod body and open, lifted up, when tie-rod can be removed or fitted on rigging journal of load. Safety pin in any position is locked by spring-loaded rods of detents installed on bracket secured on tie-rod body. Trajectory of displacement of safety pin from one position to the other is determined by shaped slots found on safety pin.

EFFECT: provision of quick connection and disconnection of tie-rod from load, facilitated visual control of closed position of tie-rod on rigging journal.

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Description

The present invention relates to the field of mechanical engineering, namely to gripping devices for lifting and tilting predominantly large-sized and large masses of cargo, when fast attachment and detachment of the thrust to the load (from the load) is required, increased reliability due to the fixation of the thrust on the lifting axle when visually of a long distance, it is necessary to control the slinging and slinging of the cargo and according to the working conditions it is impossible to carry out assembly and disassembly work with a thrust before and after the main work.

A device is known for the mounting block of the tackle system (certificate of authorship No. 300409, application No. 1260777 / 27-11 of July 29, 1968, class B 66 d 3/04), comprising a cargo earring with a spherical floating bearing mounted on it, mounted on a pin attached to the product. This device has the following disadvantages.

When the load earring deviates from the vertical, a horizontal force arises acting on the spherical bearing, which can displace it from the journal, which will cause an emergency.

Before starting work, it is necessary to mount the spherical bearing on the pin. This leads to an increase in the execution time of the main work and reduces reliability.

There is no mounting of the spherical bearing on the trunnion.

These shortcomings do not allow the use of this device to perform the tasks posed by the invention.

A gripping device for loads with trunnions is known (copyright certificate No. 1100217, application No. 3462170 / 29-11 of 05/05/1982, class B 66 C 1/66), containing a traverse, rods with pockets for trunnions. This device cannot be used for lifting and tilting bulky and large masses of cargo for the following reasons.

Additional and main traction will be very heavy. Large dimensions and large masses of cargo will require increasing the cross sections of the rods according to strength conditions. When lifting and tipping over pockets displaced relative to the axis of symmetry of the traction, a bending moment arises on the traction, and to ensure strength and rigidity, it will be necessary to increase the geometric dimensions of the cross-section of the rods and, therefore, this will lead to an even greater increase in mass.

The pocket does not fix traction and with possible fluctuations and vibrations (for example, when the center of mass of the load is shifted), the reliability of the sling and the safety of work are not ensured. When loosening the slings, spontaneous disconnection of the link from the trunnion is possible.

A device is known for the sling lock (RF patent No. 933603, application No. 2,992,245 / 29-11 of 10/10/1980, class B 66 C 1/12), equipped with a drive mechanism with a drive chain and a coupling, a dowel indicator (rod with a ring, flag), a dowel indicator (retaining plate, sleeve with a L-shaped groove, a hollow load-bearing finger with a flat, groove, shoulder and protrusion).

This device in relation to the claimed is the closest in technical essence and is taken as a prototype.

The disadvantages of the prototype include the complexity of the design and a large number of parts (case with upper and lower grooves and holes, lower brackets, upper bracket, guide bushings, clamping fingers with control mechanisms, load-bearing finger). Moreover, the brackets form a housing with protrusions included in special understatements in the frame, their connection is made by bolts. The device is equipped with balancing counterweights, and the frame is equipped with walls for installing guides and indicators of doweling and slinging. This reduces reliability and durability. The device is not protected from damage when laying on the ground (floor) and in collision with the load. This is especially true for dowel and dowel indicators, which, moreover, can be observed and monitored only by direct contact. The use of control mechanisms for connecting the lock housing to the load and to the lifting device increases the preparation time for work.

The present invention eliminates these disadvantages. The problem is solved in that the thrust with a locking device consists of a housing with a hole for a rigging pin at one end, and a connecting place to the traverse at the other end, an arm with a safety pin that locks the rigging axle inserted into the thrust hole. In this case, the locking device bracket is made with a groove for the safety pin, has fixed axes for guiding the safety pin along the profiled grooves and spring-loaded rods for fixing the safety pin, and the safety pin consists of two longitudinal parts parallel to each other, connected by a rigidly transverse part, the longitudinal axis the symmetry of one of the longitudinal parts of the safety pin coincides with the axis of symmetry of the rod passing through its center and articulating hole, having spherical surface, with the spherical surface of the lifting pin, the other longitudinal part of the safety pin is equipped with profiled grooves that define the position and movement of the safety pin when it interacts with the bracket groove, with fixed axes and manually operated spring-loaded rods, one of which fixes the safety pin in the lowered position closed to the rigging axle, the other, being the axis of rotation of the safety pin, fixes it in the open for the rigging axle by laying together with the first rod.

Figure 1 shows the thrust with a locking device - General view; figure 2 - view A; figure 3 is a variant of the connecting location to the traverse; figure 4 - callout B - latches with spring-loaded rods; figure 5 - callout In - screw locking axis; 6 and 7 - various positions of the safety check.

A rod with a locking device consists of a housing 1 with a hole 2 for dressing on the lifting pin 3 and a hole 4 with a spherical bearing surface 5 for the lifting pin 3. The lifting pin 3 is connected to the load 6. On the housing 1 there are connecting places 7 or 8 for the beam or other lifting device. The locking device includes a bracket 9 and a safety pin 10, consisting of two longitudinal parts 11 and 12 connected by the transverse part 13, and two latches 14 and 15 fixed to the bracket 9. The rod contacts the rigging pin 3 on a spherical surface with center 16. The center of the spherical surface 16 coincides with the axis of symmetry 17 of the part of the safety pin 11, lowered to the closed position 18, and the longitudinal axis of symmetry of the entire thrust. The bracket 9, mounted on the rod with bolts 19 and screw 20, has a groove in which the safety pin 10 can move. Two cases 21 and 22 of the clamps 14 and 15 are fixed on the walls of the bracket. The rod 23 of the clamp 14 has a bevel at the end for automatic retreat when lifting safety check, which also has a bevel at the point of contact with the rod 23. The rod 23 can only move in the housing translationally, without rotation, and it is not fixed in the retracted state. It can also be diverted manually by compressing the spring 24. The rod 25 of the retainer 15 is cylindrical (without a bevel), it prevents the lifting of the safety pin. It can only be retracted manually (by compressing the spring 26) and locked in the retracted position by turning the lock knob. This makes it possible to raise the safety pin up to position 27, while two axes 28, pressed into the walls of the bracket 9, will guide the safety pin along the profiled grooves 29 until the latch 14 operates. This position will correspond to the axes 28 entering the output channels 30, and the safety the check can be rotated in the arrow 31 around the rod 23 of the latch 14 180 ° up to position 32 and lowered to position 33 until it stops in the rod 25 of the latch 15.

To put the rod on the lifting pin, the safety pin 9 must be lifted and locked in position 33. The rod with a large hole 2 is put on the pin and lifted (by a crane with a slider of the yoke) up to contact with the supporting surface 5 of the lifting pin. The safety pin is lifted from position 33 to position 32, turned down to position 27 with the retainer allotted, lowered down to position 18 and locked with the rod 25 of the retainer 15.

The raised position 33 of the safety pin is observed from a great distance, and even the crane operator, observing this, may not start working until the safety pin is lowered to position 18. At the same time, a gap remains between the spigot 3 sphere and the lower end of the safety pin, the spherical hinge is not clamped and during the oscillation and buildup of the load there will be no breakage and damage to the traction and trunnion. If the buildup (draft slope) increases, then the draft will rotate around the center 16 of the spherical surface and can rest against the stops 34 and 35 on the pin.

There must be at least two rods for lifting the load (part of the load) and for tipping. The number of pins must match the number of rods.

In the inoperative position and when storing the rod with the locking device as a part of the traverse or separately from it, the safety pin must be lowered to position 18 and secured by the rod 25. This eliminates breakage during accidental contact with the load and when laying on the floor or in containers. A rod with a locking device reliably fixes the lifting pin in the hole of the rod housing and eliminates its disconnection when the traverse cable is loosened.

Claims (1)

A rod with a locking device, consisting of a housing with a hole for a rigging pin at one end and a connecting place to the traverse at the other end, an arm with a safety pin locking the lifting axle inserted into the rod hole, characterized in that the bracket of the locking device is made with a groove for the safety the check has fixed axes for guiding the safety check along the profiled grooves and spring-loaded rods for fixing the safety check, and the safety check consists of two of longitudinal parts parallel to each other, connected by a rigidly transverse part, the longitudinal axis of symmetry of one of the longitudinal parts of the safety pin coincides with the axis of symmetry of the rod passing through its center and articulating with a hole having a spherical surface, with the spherical surface of the rigging journal, and the other longitudinal part of the safety the check is equipped with profiled grooves that determine the position and movement of the safety check when it interacts with the groove of the bracket, with fixed and spring-loaded manually operated rods, one of which fixes the safety pin in the lowered position closed for the rigging axle, the other, being the axis of rotation of the safety pin, fixes it in the open position for the rigging axle together with the first rod.

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