CN214570203U - Balanced height limiting device suitable for crane - Google Patents

Abstract

The utility model discloses a high stop device of balanced type suitable for hoist belongs to hoisting machinery's technical field. The device comprises two lifting frame ropes hinged on a lifting arm head hanging piece, a tetragonal body collision frame which is hung below a lifting arm head fixed pulley block and always kept in a horizontal state through the lifting frame ropes, and a limit switch which is arranged on the lifting arm head hanging piece and connected with the upper end of the lifting frame rope; the square body hits the frame and is the hollow quadrangular prism structure that the inner chamber leads to the chamber from top to bottom, all is provided with two rings that are used for fixed hanging the frame rope on the wall around the square body hits the frame, hits the right side wall of frame at the square body and has seted up wire rope entry logical groove, hits the right side wall surface mounting who frames at the square body and have sealed the board. Utilize the utility model discloses can the limit of injecing the lifting hook accurately reliably lift by crane the height, can effectively avoid with wire rope's collision and friction, the wearing and tearing of the wire rope that have significantly reduced, accurate, sensitive, safe, economy, be suitable for, the commonality is strong, easy to assemble.

Description

Balanced height limiting device suitable for crane

Technical Field

The utility model belongs to the technical field of hoisting machinery, more specifically say and relate to a high stop device of balanced type suitable for hoist.

Background

In various cranes, the hoisting mechanism, the steel wire rope and the lifting hook are required to be subjected to height limitation, and the height limitation directly influences the hoisting state, parking in place and safety of a heavy object, and is particularly important for the height limitation of the lifting hook. And the height limit needs a certain height limit device.

The first traditional lifting hook height limiting device is a screw type limiting switch fixed at the end part of a lifting drum shaft, the screw type limiting switch rotates along with the drum, when the lifting hook reaches a determined height, the end part of a screw touches the limiting switch, a lifting mechanism is powered off, and the purpose of limiting lifting of the lifting hook is achieved. However, because the amplitude of the crane boom and the heavy object is constantly changed, the power-off position of the limit switch is not fixed, so that the action of the height limit device is inaccurate, namely the stop position of the lifting hook is not at the optimal position, and the lifting hook is suddenly high or low, even the roof-fall danger is generated.

The second conventional hook height limiter is a tilting suspension weight hook height limiter (see fig. 7, 8 and 9 for details), and since this height limiter is installed on the head of the boom, no matter what amplitude the boom is, when the hook 8 rises to a specified height, the limit switch 3 is triggered, the lifting mechanism is powered off, and the hook 8 stops rising. However, such a tilting suspension weight 1 'is too small and, due to the tilting suspension by means of the single-sided suspension rope 2', wear is severe for the moving wire rope.

Disclosure of Invention

The purpose of the utility model is to provide a high stop device of balanced type suitable for hoist just to the weak point that exists among the above-mentioned prior art. The utility model can accurately and reliably limit the lifting height of the lifting hook, avoid the roof fall danger, ensure the lifting safety, and has the advantages of accuracy, sensitivity and safety; the utility model replaces the traditional inclined hanging heavy hammer with the balance type square collision frame which always keeps horizontal state, can effectively avoid collision and friction with the steel wire rope, greatly reduces the abrasion of the steel wire rope, prolongs the service life of the steel wire rope, and has the advantages of economy and applicability; furthermore, the utility model discloses still have application scope wide, the commonality is strong, easy to assemble, the advantage of being convenient for make.

The purpose of the utility model can be realized by the following technical measures:

the utility model discloses a balanced type height limiting device suitable for hoist includes two hanging frame ropes (be convenient for keep the square body to hit the horizontal state of frame) that the middle part articulates on jib loading boom head pendant, the square body that hangs below jib loading boom head fixed pulley group through the hanging frame rope and keep the horizontal state all the time hits the frame, install on jib loading boom head pendant, and with the limit switch that hangs the middle part of jib loading boom rope flexible coupling (link to each other through flexible rope between the middle part of hanging frame rope and the limit switch and control the power-on and power-off of limit switch, when the lifting hook rises to the regulation height along with wire rope, jack up the square body and hit the frame, flexible rope no longer kick-backs by the pulling force that the square body hit the frame, the limit switch cuts off the power, then send signal makes hoisting mechanism cut off the power supply, the lifting hook stops the action, thereby reach the purpose of height limiting; the square body hits the frame and is the hollow quadrangular structure (the wire rope of being convenient for runs through from top to bottom) that the inner chamber leads to the chamber from top to bottom, all be provided with two rings (the end that is used for fixed hanging the frame rope) that are used for fixed hanging the frame rope on the wall around the square body hits the frame, hit the wire rope entry logical groove that the top-down link up (be convenient for wire rope transversely get into the square body fast and hit the inner chamber of frame) at the right side wall that the frame was hit to the square body and set up through the bolt combination mode at the right side wall surface that the frame was hit to the square body and seal the board (prevent that wire rope from leading to the groove slippage from the wire rope entry).

The utility model discloses two in the length of hanging the frame rope is the same.

The utility model discloses in two hang the frame rope and distribute in the both sides of single percentage hoist jib loading boom head fixed pulley.

The utility model discloses in two hang the frame rope and distribute in same one side of multiple ratio hoist jib loading boom head running block.

The principle of the utility model is as follows:

the limit hoisting height of the lifting hook can be sensitively, accurately and reliably limited by using the lifting hook, the roof-fall danger is avoided, and the hoisting safety is ensured; and the utility model discloses hit the frame with the balanced type tetragonal body that remains the horizontality throughout and replaced traditional tilting to hang the weight, can effectively avoid with wire rope's collision and friction, the wire rope's that has significantly reduced wearing and tearing improve wire rope's life, have the advantage that economy is suitable for. More specifically, the crane boom head hanging piece is hinged and connected with two hanging frame ropes, the middle parts of the hanging frame ropes are flexibly connected with the limit switch through flexible ropes, two ends of the two hanging frame ropes are respectively connected with two hanging rings on the front wall and the rear wall of the tetragonal body collision frame, the middle parts of the two hanging frame ropes are hinged on the crane boom head hanging piece, and the tetragonal body collision frame can be hung below a crane boom head fixed pulley block in a always horizontal state. Like this when one section steel wire rope of very end transversely gets into the tetragonal body from wire rope entry logical groove and hits the frame inner chamber and run through the tetragonal body and hit the direction of height of frame, wire rope does not hit the frame with the tetragonal body and takes place collision and friction, has significantly reduced wire rope's wearing and tearing, improves wire rope's life, has economic advantage suitable. And when the lifting hook ascends to the specified height along with the steel wire rope, the square body is jacked to hit the frame, the flexible rope is not rebounded by the pulling force of the square body hitting the frame any more, the limit switch is powered off, then a signal is sent out to enable the lifting mechanism to be powered off, and the lifting hook stops acting, so that the purpose of height limitation is achieved. Because the utility model discloses do not receive pitching or the restriction of trolley position of crane boom, compare with the first spiral stop device of installation on the jack-up reel of tradition, have accurate, sensitive, safe advantage. Furthermore, the utility model is suitable for a hoist of various multiplying powers has application scope extensively, the strong advantage of commonality. The utility model discloses it leads to the groove to have seted up the wire rope entry at the right side wall that the square body hit the frame, and the wire rope of being convenient for transversely gets into the inner chamber that the square body hit the frame fast, has avoided the tradition to hit the piece and need wire rope vertically to penetrate from the beginning trouble, has easy to assemble's advantage.

The utility model has the advantages of as follows:

the utility model can accurately and reliably limit the lifting height of the lifting hook, avoid the roof fall danger, ensure the lifting safety, and has the advantages of accuracy, sensitivity and safety; the utility model replaces the traditional inclined hanging heavy hammer with the balance type square collision frame which always keeps horizontal state, can effectively avoid collision and friction with the steel wire rope, greatly reduces the abrasion of the steel wire rope, prolongs the service life of the steel wire rope, and has the advantages of economy and applicability; furthermore, the utility model discloses still have application scope wide, the commonality is strong, easy to assemble, the advantage of being convenient for make.

Will the utility model discloses the wide application is obvious in effect on the hoist, and the concrete embodiment is as follows:

1. simple structure, spacing accurate: according to the set height, the lifting hook stroke error is not more than 60mm when the power is off, the spiral limit switch arranged on the winding drum is different along with the amplitude of the crane boom, and the lifting hook stroke error is 300-600 mm when the power is off.

2. The adaptability is strong: the crane with the multiplying power is suitable for cranes with various multiplying powers, particularly for cranes with multiplying powers of 1 or repeatedly converting multiplying powers of 1 and N, the friction between a moving steel wire rope and a heavy hammer is thoroughly avoided, and the service life of the steel wire rope is prolonged by more than 2 times.

3. The installation is convenient: one side of the square collision frame is provided with an opening and a sealing device, so that the trouble that a steel wire rope needs to be penetrated from the head in the traditional collision block is avoided.

4. The crane is safe and reliable, simple and convenient to manufacture, high in efficiency, significant in significance in popularization and application of the crane, and remarkable in social benefit and economic benefit.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is a schematic view of the installation state of the single-rate crane of the present invention.

Fig. 5 is a view from direction a of fig. 4.

Fig. 6 is a schematic view of the installation state of the present invention on the multi-power crane.

FIG. 7 is a schematic view of a height limiting device for a conventional inclined suspension weight hook.

FIG. 8 is a schematic view of the installation state of a conventional inclined suspension weight hook height limiting device on a single-rate crane.

FIG. 9 is a schematic view of the installation state of the height limiting device of the conventional inclined suspension weight hook on the multi-rate crane.

Part numbers in the drawings: 1. the steel wire rope sealing device comprises a square collision frame, 1-1 parts of a lifting ring, 1-2 parts of a steel wire rope inlet through groove, 1-3 parts of a sealing plate; 2. the crane comprises a crane frame rope, 3, a limit switch, 4, a crane boom head hanging part, 5, a single-time-rate crane boom head fixed pulley, 6 multiple-time-rate crane boom head fixed pulley block, 7, a steel wire rope, 8, a lifting hook, 9 and a flexible rope; 1 'inclined hanging heavy hammer and 2' single side hanging rope.

Detailed Description

The present invention will be further described with reference to the accompanying drawings:

as shown in fig. 1-6, the balanced height limiting device for a crane of the present invention comprises two lifting frame ropes 2 hinged to a lifting arm head hanger 4 at the middle part (for maintaining the horizontal state of the square body hitting frame 1), a square body hitting frame 1 suspended below a lifting arm head fixed pulley block through the lifting frame ropes 2 and always kept in the horizontal state, a limiting switch 3 installed on the lifting arm head hanger 4 and flexibly connected to the middle part of the lifting frame rope 2 (the middle part of the lifting frame rope 2 is connected to the limiting switch 3 through a flexible rope 9 to control the power on/off of the limiting switch 3, when the lifting hook 8 rises to a specified height along with a steel wire rope 7, the square body hitting frame 1 is jacked, the flexible rope 9 is not rebounded by the pulling force of the square body hitting frame 1, the limiting switch 3 is powered off, then a signal is sent to power off the lifting mechanism, the lifting hook 8 stops operating, thereby achieving the purpose of height limiting); the square collision frame 1 is of a hollow quadrangular structure with an inner cavity which is a through cavity from top to bottom (so that a steel wire rope 7 can penetrate through the square collision frame up and down), two hanging rings 1-1 (used for fixing the end of the hanging frame rope 2) for fixing the hanging frame rope are arranged on the front wall and the rear wall of the square collision frame 1, a steel wire rope inlet through groove 1-2 which is through from top to bottom is formed in the right side wall of the square collision frame 1 (so that the steel wire rope 7 can quickly and transversely enter the inner cavity of the square collision frame 1), and a sealing plate 1-3 is arranged on the outer surface of the right side wall of the square collision frame 1 in a bolt combination mode (so that the steel wire rope 7 can not slip from the steel wire rope inlet through groove 1-2).

The length of the hanging frame rope (2) is the same.

The utility model discloses in two 2 distribution of hanging the frame rope are in the both sides of single percentage hoist jib loading boom head fixed pulley 5.

The utility model discloses in two 2 distributions of lifting frame rope are in same one side of multiple multiplying power hoist jib loading boom head fixed pulley group 6.

The utility model discloses a concrete in service behavior as follows:

firstly, two ends of a lifting frame rope 2 are connected with two lifting rings 1-1 on the front wall of a tetragonal body collision frame 1; then connecting two ends of another equal-length lifting frame rope 2 with two lifting rings 1-1 on the rear wall of the square collision frame 1; then, the middle parts of the two lifting frame ropes 2 are hinged to a lifting piece 4 at the head part of the lifting arm, namely the two lifting frame ropes 2 are distributed on two sides of a fixed pulley at the head part of the lifting arm in the single-magnification crane in the embodiment I, the two lifting frame ropes 2 are distributed on the same side of the fixed pulley at the head part of the lifting arm in the single-magnification crane in the embodiment II, and the square collision frame 1 is adjusted to be in a horizontal state; then, the middle parts of the two lifting frame ropes 2 are flexibly connected with a limit switch 3 arranged on a lifting piece 4 at the head part of the crane boom through a flexible rope 9; then, transversely enabling a section of the steel wire rope 7 at the tail end to enter the inner cavity of the tetragonal body collision frame from the steel wire rope inlet through groove 1-2 and penetrate through the height direction of the tetragonal body collision frame, so as to ensure that the steel wire rope 7 does not collide and rub with the tetragonal body collision frame; then, the sealing plate 1-3 for preventing the steel wire rope 7 from slipping from the through groove 1-2 at the inlet of the steel wire rope is connected and arranged on the outer surface of the right side wall of the tetragonal body collision frame 1 through a bolt; and finally, starting the power of a hoisting mechanism of the crane to drive the steel wire rope 7, the lifting hook 8 and a hoisting weight to ascend, jacking the tetragonal body to hit the frame 1 when the lifting hook 8 ascends to a specified height along with the steel wire rope 7, enabling the flexible rope 9 not to rebound due to the tensile force of the tetragonal body hitting the frame, powering off the limit switch 3, then sending a signal to enable the hoisting mechanism to be powered off, and stopping the lifting hook 8 to act, thereby achieving the purpose of height limitation.

Claims (4)

1. The utility model provides a high stop device of balanced type suitable for hoist which characterized in that: the device comprises two lifting frame ropes (2) with the middle parts hinged on a lifting arm head hanging part (4), a square collision frame (1) which is hung below a lifting arm head fixed pulley block through the lifting frame ropes (2) and is always kept in a horizontal state, and a limit switch (3) which is arranged on the lifting arm head hanging part (4) and is flexibly connected with the middle part of the lifting frame rope (2); the square collision frame (1) is of a hollow quadrangular structure with an inner cavity communicated with a cavity from top to bottom, two hanging rings (1-1) used for fixing a hanging frame rope are arranged on the front wall and the rear wall of the square collision frame (1), a steel wire rope inlet through groove (1-2) communicated from top to bottom is formed in the right side wall of the square collision frame (1), and a sealing plate (1-3) is installed on the outer surface of the right side wall of the square collision frame (1) in a bolt combination mode.

2. The balanced height limiting device suitable for the crane according to claim 1, wherein: the two hanging frame ropes (2) are the same in length.

3. The balanced height limiting device suitable for the crane according to claim 1, wherein: the two lifting frame ropes (2) are distributed on two sides of a fixed pulley (5) at the head of a lifting arm of the single-rate crane.

4. The balanced height limiting device suitable for the crane according to claim 1, wherein: the two lifting frame ropes (2) are distributed on the same side of a fixed pulley block (6) at the head of a cargo boom of the multi-power crane.

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