Hoisting gear

IPC classes for russian patent Hoisting gear (RU 2513887):

B66C23/00 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes (base-supporting structures with legs B66C0005000000; adaptations of girders or of track-supporting structures B66C0006000000)

Another patents in same IPC classes:

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Invention relates to chassis connection system for hoisting cranes. Hoisting crane comprises chassis with two side frames and two end crossbars. Note here that every frame is connected with every end crossbar with the help of chassis connector which can be detached so that said side frames and end crossbars can be separately conveyed between working sites and reassembled at new working site. Two side frames are interchangeable in chassis assembly as well as two end crossbars. Every said side frame and crossbar has rolling path sections and rim section attached thereto in transfer and assembly.

Method of tower crane rotary part control / 2499762

In control over tower crane top rotary part turn when crane operates at wind speed higher than preset threshold, motor 16 develops maximum torque as long as these conditions persist. Device to control tower crane top rotary part turn comprises turn electric drive 12 including motor 16, reduction gear 17, frequency variator 19, computer 21 with inputs 22, 23, 24 to define wind speed, crane boom length and moment of load suspended from boom and output 25 connected with frequency variator 19.

Method of lifting cargo by mobile crane / 2494955

Invention relates to lift-and-carry equipment and is intended for increasing crane capacity. Mobile crane comprises bearing frame with rotary jib lifter and towing coupler with towed trailer coupled therewith in working conditions. Sais trailer is coupled with running frame by fixation mechanism furnished with the drive and link between connected components. Then, bracing jacks, outriggers, are set to working position to lift the crane along with trailer. Running frame and towed carriage propulsive wheels with counterweight are lifted above the track to make crane and trailer weight counteract the weight moment. Mutual position between running frame arranged in transfer is maintained invariable in working position.

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Invention relates to handling equipment and may be used for transfer of cargoes in vertical and horizontal planes. Proposed hoist comprises converter, flexible element, drum and suspended pulley. Converter is mounted on the bed and composed of cargo flexible element wound on rotary drum in one direction and suspended pulley for hinging carried cargo. Flexible element is secured to the drum by both end. Aforesaid pulley is arranged at flexible element with vertical radial clearance between aid drum and flexible element in, at least, one of coils. Flexible element inner surface makes helical surface. Said drum and cargo flexible element secured thereto make running screw of screw hoist. Said screw interacts with cargo suspension to translate the cargo along drum rotational axis.

Self-propelled lift crane and method of its operation / 2464221

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Invention relates to handling equipment to be used in placing machines in storage. Automatic coupling is used to mount the device on hydraulically driven tractor mounts. Said device is made up of tube with extending element driven by hydraulic cylinder. Lifting hydraulic cylinder is fitted on extending element end to be adjusted relative to vertical. Cylinder rod is furnished with replaceable thrust.

Multifunctional mechanism / 2458000

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Method, device and computer program for control over hydraulic boom operation / 2448895

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Method of crane operation control / 2440924

Invention relates to machine building and may be used for control over dynamic characteristics brought about in turn of crane boom with cargo. Proposed method consists in processing signals of transducers that control position of crane moving equipment and its load and cutting of mechanisms drives in correspondence with motion limitations and overload conditions. Displacement speed selection signals and conditions are generated depending upon crane load. Tolerable overturn moment is calculated for every crane radius to be entered in onboard microprocessor memory. Cable tension is measured to define current overturn moment to be compared with tolerance for given crane radius. Said data is displayed on video panel. Operator may vary recommended parameters. When current overturn moment approximates to maximum tolerable magnitude, control system automatically changes speed to allow operator to change motion parameters. In case tolerable overturn moment is exceeded, motion is stopped. Further operation is to be performed only in recommended conditions.

Device for telescoping truck crane 4-section boom / 2434803

Invention relates to machine building and may be used in designing and operating automotive cranes. Proposed device comprises operator's joystick connected with hydraulic control valve, 4-section telescopic boom with pickup secured on the end of first section, and a mark made on second section at preset location other than section start. Second, third and fourth sections are mounted to travel along their axes driven by hydraulic cylinders communicated via hydraulic cline with hydraulic control valve. Proposed device is equipped with control system connected, on one side, with pickup, and, on the other side, with hydraulic control valve, and independent control element connected with control system.

/ 2246436

/ 2252909

/ 2264347

/ 2297969

/ 2297970

/ 2299173

/ 2304079

/ 2305064

/ 2306254

/ 2307783

FIELD: transport.

SUBSTANCE: invention relates to load-lifting equipment and can be used for handling of heavy cargoes, mainly, for lifting the latter to minor height with locking at lifted position. Hosting gear comprises block and tackles, rope and drive. Drive force is applied to rope length at angle other than 0°, to lengthwise axis of said rope length.

EFFECT: simplified design, decreased overall dimensions.

5 cl, 6 dwg

The invention relates to hoisting equipment and can be used to move large loads, mainly on small value with subsequent fixation in the raised position. For example, the invention can be used to lock in the operating mode of the transport provisions of the trailer wheel balances with chassis platform with a powerful motor and railway cranes to achieve a significant increase in capacity with a significantly reduced rear clearance of these products. In General, the proposed solution allows 10 or more times to increase the capacity of the devices that are implemented on the basis of polyspastny mechanism.

Known force multiple sheave pulleys. In it the cargo is attached to a movable holder, and traction is applied to the branches of a rope running from the last of the successively around the rope blocks. The tension of the rope is determined by dividing the weight by the ratio of the polyspast, which is determined by the number of moving blocks (Large Soviet encyclopedia, M., 1975, the variable geometry mechanism, str).

The disadvantage of this design is the complexity, cost, increasing the dimensions of the product, reducing the overall efficiency

Well-known single sheave pulleys, which is a special case of the multiple to the second contains the stationary unit, it has a wheel with a groove, a rope, and which is additionally equipped with a drive for raising phone

This design, this lifting device has a maximum simplicity and minimum dimensions. But it has no gains in strength, which is a significant drawback. The force of the actuator leads to a rise equal to the force of gravity. Take this solution as a prototype.

The aim of the invention is to eliminate this drawback and to create an additional gain in strength when using lifting devices containing a sheave pulleys and blocks, rope and drive.

This is achieved by the action of the drive power applied to the section of the rope at an angle not equal to 0° to the longitudinal axis of the same section of rope,

that end of the rope around a fixed block fixed to the fixed bearing, and the action of the drive power applied to the section of rope that is located between the fixed block and the anchor point of the end of the rope on the pole and directed at an angle not equal to 0°, to the longitudinal axis of the same section of rope;

when one stationary unit and the fixing end of the rope around the block, on the fixed bearing, the force of the actuator is directed at an angle of 90° to the tangent line connecting the point of fastening of the end of the rope on the pole and circle trench, nebody the aqueous block, and attached to the section of rope that is located between the anchor point of the end of the rope on the fixed bearing and the fixed unit;

when two stationary blocks and secure the end of the rope around these blocks, on the fixed bearing, the force of the actuator is directed at an angle of 90° to the tangent to the line connecting the circumference of the gutters fixed blocks, and applied to the section of rope that is located between the units;

when two stationary blocks the action of force of the actuator is directed at an angle of 90° to the tangent to the line connecting the circumference of the chute blocks, and applied to the section of the rope located between the blocks, and both ends of the rope is fixed on a raised load.

In the General case, the force of the actuator can be directed at an angle not equal to 0°, to the longitudinal axis of the section of the rope at any point in the flexible working body located between nearest to raise the load stationary unit and the anchor point of the end of the rope on the fixed bearing or load.

The invention allows to obtain significant gains in strength, not only for lifting devices containing single sheave pulleys, but also an additional benefit to using multiple tackles of any complexity.

Let us assume that the free end of the rope belongs to the branch, which gibernatsija unit and not attached to the cargo. The other end of the rope, which we will refer to cargo intended to provide a connection to the raised body.

In figure 1, figure 2 depicts one of the options proposed lifting device containing one fixed block position 1, the flexible body in the form of a rope 2, one end of which is secured to raise the load 3. The function of the drive performs, for example, a hydraulic cylinder pos.4 having a retractable rod 5. POS. 5 has at the end of the roller with the groove, that is the block, which moves the rope. Flexible working body pos.2 cargo end is connected with the raised body, and opposite him the freedom enshrined in the fixed bearing 6.

Figure 3, Figure 4 shows another variant of a structural embodiment of the lifting device with two fixed blocks POS.1 and fastening the free end of the rope on the fixed bearing 6.

In the General case, the force of the actuator can be directed at an angle not equal to 0°, to the longitudinal axis of the rope at any point between nearest to raise the load stationary unit and the anchor point of the end of the rope on the pole.

Figure 5 shows a variant with two fixed blocks 1 and around them the rope 2, the ends of which are connected to two raised to pH 3 and fixed on them.

This solution allows you to lift weights the same as the assy, and varying in size. When the action of the pushing force of the hydraulic cylinder pos.4 in the middle section of the rope located between the fixed blocks, lifting force developed by each branch of flexible working body, located respectively on the left and right sides relative to the roller shaft 5 of the drive pos.4, will be the same. When shifting from the middle of the tension of the branches of the rope will vary by known mathematical laws and will differ from each other. By regulating the position 5 relative to the block position 1 it is possible to achieve simultaneous lifting not only identical, but differ from each other in mass.

Figure 6 shows a variant of the construction procedure of lifting device with two fixed blocks POS.1 and fixing both ends of the rope on the same cargo. Upon actuation of the actuator and the extension 5 is changing the position of the rope located between the blocks, with a straight to a curve in the form of an obtuse angle, which is located with its top side pos.4. As you move the rod down is lifting up. This option would be appropriate for bodies having a large size. This solution is optimal for a small lift to lock in the raised position heavy loads having a large size, and can be applied on strong the road and rail cranes, feature trailer wheel counterbalance the weight of 30-100 so

The proposed lifting device as follows.

When the supply pressure in the piston cylinder chamber for the nomination of his rod 5 and lifting. This mode is shown in figure 2 and Figure 4. The plot of the rope located between the permanently installed units 1 or between the block and the fixed support 6, is bent, deflected downward from the original position and its track from a straight line is converted to a curve. The angle part of the rope located between the block and the roller shaft 5, we denote by α.

Changing the position of the flexible working body, shifting it down with a drive leads to the lift. This is because the length of the rope located between the block and the roller shaft drive, changed, increased, since any curve more straight line connecting its ends.

The value of the effort of the cylinder, resulting in bending of the rope shall be determined in accordance with the parallelogram of forces. That is, the force F is the resultant of the efforts in the areas of-war between points B-C and C-D. In mathematical form for this symmetrical arrangement of the drive between the blocks (or between the block and the support) can be represented by the formula: F=2P×sinα Approximated for small α, the gain in strength is equal to the private from the fact the Oia length between points B and C to the deviation of the rope roller rod cylinder N. At small angles of deflection of the rope (the X value of the force F can significantly ten times or more to be less than the weight of lifted load. That is, the new solution allows you to implement a structurally simple and compact lifting device and to obtain a significant gain in power with minimal effort lifting, developing Executive body of the drive.

The application of the present invention can effectively be used to create a lifting mechanism for special purposes. Its distinguishing feature is receiving significant additional gains in strength when lifting using multiple or single sheave pulleys. This simplifies the design and significantly reduced the size of the device. Optimal use of the proposed lifting mechanism at relatively small values of the stroke of the actuator. For example, when lifting a massive wheel trailer balances needed to create powerful mobile cranes. Them (trailers) application allows 50% to 70% to increase the capacity of the product and that is very important to operate, especially for Railways to provide a minimum rear clearance. In this case, to create additional restraint moment just need nemnogolyudny contrast, to tear off his wheels on railway tracks or roads and fix this situation. Then the weight of the trailer counterweight will be added to the mass mounted on the outriggers of the crane and will significantly increase the stability of the entire product.

1. Lifting device containing a sheave pulleys and blocks, rope and actuator, characterized in that the drive power applied to the section of the rope at an angle not equal to 0°, to the longitudinal axis of the same section of rope.

2. Lifting device according to claim 1, characterized in that the end of the rope around a fixed block fixed to the fixed bearing, and the action of the drive power applied to the section of rope that is located between the fixed block and the anchor point of the end of the rope on the pole and directed at an angle not equal to 0°, to the longitudinal axis of the same section of rope.

3. Lifting device according to claim 1, characterized in that the stationary unit and the fixing end of the rope around the block, on the fixed bearing, the force of the actuator is directed at an angle of 90° to the tangent line connecting the point of fastening of the end of the rope on the pole and circle trench stationary block, and attached to the section of rope that is located between the anchor point of the end of the rope on the fixed bearing and the fixed block.

4. Lifting device is about to claim 1, characterized in that when two stationary blocks and secure the end of the rope around these blocks, on the fixed bearing, the force of the actuator is directed at an angle of 90° to the tangent to the line connecting the circumference of the gutters fixed blocks, and applied to the section of the rope located between the blocks.

5. Lifting device according to claim 1, characterized in that when two stationary blocks the action of force of the actuator is directed at an angle of 90° to the tangent to the line connecting the circumference of the chute blocks, and applied to the section of the rope located between the blocks, and both ends of the rope is fixed on a raised load.