Ascending limiting counter weight of bridge crane

Abstract

The utility model discloses a bridge crane ascending limit heavy punch which comprises two shackles, the two shackles are symmetrically arranged, the shackles are respectively clamped and wound on a hoisting main steel wire rope on two sides of a hoisting mechanism balance wheel, each shackle comprises a transverse pin and a U-shaped bent ring, the U-shaped bent ring is horizontally arranged, and the transverse pin is connected with the U-shaped bent ring. Pin holes allowing the transverse pin to penetrate through are formed in the open ends of the outer sides of the two U-shaped bent rings respectively, the inner sides of the U-shaped bent rings are in threaded connection with the transverse pin, the U-shaped bent rings are fixed through the connecting transverse plate, a semicircular lifting lug is arranged at the center balance position of the top of the connecting transverse plate, and the opening direction of the semicircular lifting lug is perpendicular to the plane of the connecting transverse plate. By means of the double-shackle symmetrical structure design, the problem that a traditional limiting heavy hammer rotates and winds due to single-point hoop fixing is fundamentally solved, the two U-shaped bent rings and the interceptable connecting transverse plate are rigidly welded to form a balance system, and the heavy hammer is kept in a zero-rotation state when a lifting steel wire rope rotates.

Description

Technical Field

[0001] This utility model relates to the field of bridge crane technology, specifically to a lifting limit weight for a bridge crane. Background Technology

[0002] The Chinese patent published in Announcement No. CN218174445U is a crane hoisting limit counterweight device capable of stable and safe operation. The hoisting wire rope collar is U-shaped, and sleeves are fitted on the two side rods and cross rods of the U-shape. The inner wall of the sleeves is in rolling fit with the rods of the side rods and cross rods. There are two connecting holes on the side wall of the counterweight, and the lower parts of the two side rods are inserted into the connecting holes on the side wall of the counterweight and tightened by bolts. The counterweight wire rope is inclined to the side of the hoisting wire rope, with a 30° inclination between the counterweight wire rope and the hoisting wire rope, so that the counterweight wire rope is away from the hoisting wire rope, and the sleeve on the counterweight can be tightly attached to the hoisting wire rope.

[0003] However, the patent uses a rolling sleeve to prevent sticking, but in actual operation, oil stains can easily enter the sleeve gap, which will increase the rolling resistance and cause the counterweight to still rotate and get tangled with the wire rope.

[0004] Chinese patent CN112010188B discloses a limiting hammer and a crane. The limiting hammer includes a hammer body and a blocking component. The hammer body has a channel and an opening communicating with one side of the channel. A rope can enter or exit the channel through the opening while maintaining its extension direction in the same direction as the opening. When the rope enters the channel, it simultaneously passes through both ends of the channel. The blocking component is movably disposed on the hammer body and has a first state that prevents the rope from entering or exiting the channel through the opening and a second state that allows the rope to enter or exit the channel through the opening. This limiting hammer allows for easy rope placement and removal simply by gently pressing the blocking component to the second state.

[0005] Although the patent simplifies the handling of the rope, it relies on a single-channel locking structure. If the blocking component fails due to vibration or wear, the counterweight will immediately detach from the wire rope, resulting in the complete loss of the limiting function. Utility Model Content

[0006] The purpose of this utility model is to provide a lifting limit hammer for a bridge crane. The double-point rigid locking structure can completely eliminate rotational entanglement, forming a double insurance mechanism to solve the risk of single-point failure, thus solving the problems in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A lifting limit counterweight for a bridge crane includes two shackles arranged symmetrically. The shackles are respectively wound around the main lifting wire ropes on both sides of the balance wheel of the lifting mechanism. Each shackle includes a horizontal pin and a U-shaped bend. The U-shaped bend is horizontally arranged. The outer open end of each U-shaped bend has a pin hole for the horizontal pin to pass through. The inner side is threaded to the horizontal pin. The U-shaped bends are fixed together by a connecting horizontal plate. A semi-circular lifting lug is provided at the center balance position of the top of the connecting horizontal plate. The opening direction of the semi-circular lifting lug is perpendicular to the plane of the connecting horizontal plate.

[0009] Preferably, the connecting horizontal plate is welded and fixed to the U-shaped bend, and the welding point between the connecting horizontal plate and the U-shaped bend is located on the back of the closed end of the bend.

[0010] Preferably, the semi-circular annular lug is welded and fixed to the connecting horizontal plate.

[0011] Preferably, the horizontal pin is threaded into the pin hole, and the horizontal pin and the U-shaped bend form a closed-loop structure.

[0012] Preferably, the inner width of the U-shaped bend is greater than the diameter of the main lifting wire rope, but less than twice the diameter of the wire rope.

[0013] Preferably, the end of the cross pin is provided with an anti-loosening nut.

[0014] Preferably, a wear-resistant bushing is provided on the inner wall of the U-shaped bend, and the wear-resistant bushing is made of nylon or polyurethane.

[0015] Preferably, a counterweight is welded to the bottom of the connecting cross plate, and the counterweight is made of cast iron.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention, through its double-shackle symmetrical structure design, fundamentally solves the rotational entanglement problem caused by single-point clamp fixation in traditional limiting hammers. Two U-shaped bends are rigidly welded to the cuttable connecting cross plate to form a balance system, ensuring the hammer maintains zero rotation when the lifting wire rope rotates. This eliminates rotational torque from a mechanical perspective, significantly improving the reliability of the limiting device and completely eliminating the risk of adhesion between the suspension wire rope and the main wire rope. Disassembly only requires unscrewing the cross bolt with a wrench to release the wire rope constraint, without disassembling the hammer body or tightening the bolts. This greatly reduces operational intensity and danger in high-altitude operations, providing substantial convenience. Attached Figure Description

[0018] Figure 1 This is an isometric drawing of the structure of this utility model;

[0019] Figure 2 This is a bottom view of the structure of this utility model;

[0020] Figure 3 This is a top view of the structure of this utility model.

[0021] In the diagram: 1. Horizontal pin; 2. U-shaped bend; 3. Connecting horizontal plate; 4. Semi-circular ring lifting lug; 5. Pin hole; 6. Wear-resistant bushing; 7. Counterweight. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To address the problem of wire rope entanglement in existing technologies, the following technical solution is provided. Please refer to [link / reference]. Figure 1-3 ;

[0024] A lifting limit counterweight for a bridge crane includes two shackles arranged symmetrically. The shackles are respectively hooked onto the main lifting wire ropes on both sides of the balance wheel of the lifting mechanism. The two shackles form a double insurance mechanism. When one shackle fails, the other shackle can still maintain control over the lifting limit height.

[0025] Each shackle includes a horizontal pin 1 and a U-shaped bend 2. The U-shaped bend 2 is horizontally positioned. Each of the outer open ends of the two U-shaped bends 2 has a pin hole 5 for the horizontal pin 1 to pass through. The inner side is threaded to the horizontal pin 1 for screwing in and locking the horizontal pin 1. The U-shaped bends 2 are fixed together by welding with a connecting horizontal plate 3. The welding point between the connecting horizontal plate 3 and the U-shaped bend 2 is located on the back of the closed end of the U-shaped bend 2, forming a rigid connection structure. The double U-shaped bends 2 can effectively limit the rotation of the weight and avoid the problem of the suspended weight and the hoisting mechanism wire rope rotating and getting tangled and sticking to the hoisting mechanism wire rope.

[0026] A semi-circular ring-shaped lifting lug 4 is provided at the center balance position at the top of the connecting horizontal plate 3. The opening direction of the semi-circular ring-shaped lifting lug 4 is perpendicular to the plane of the connecting horizontal plate 3. It is used to thread and fix the galvanized thin steel wire rope for suspending the weight. The semi-circular ring-shaped lifting lug 4 is welded and fixed to the connecting horizontal plate 3. The inner diameter of the semi-circular ring-shaped lifting lug 4 is 10-15mm.

[0027] The connecting cross plate 3 is made of counterweight steel plate with selectable width. Its length can be adjusted by cutting to fit the main lifting wire rope with different spacing. The length can be cut and adjusted in the range of 200-350mm.

[0028] The inner width of the U-shaped bend 2 is greater than the diameter of the main lifting wire rope, but less than twice the diameter of the wire rope, which prevents it from coming off and avoids excessive gaps that could cause swaying.

[0029] The end of the horizontal pin 1 is provided with an anti-loosening nut, which is used to prevent the horizontal pin 1 from loosening and unscrewing after locking.

[0030] The inner wall of the U-shaped bend 2 is provided with a wear-resistant bushing 6, which is made of nylon or polyurethane.

[0031] A counterweight 7 is welded to the bottom of the connecting horizontal plate 3. The counterweight 7 is made of cast iron.

[0032] During assembly, cut the connecting horizontal plate 3 to the required length. The length is determined according to the distance between the steel wire ropes on both sides of the balance wheel. Weld the closed ends of the two U-shaped bends 2 to both ends of the connecting horizontal plate 3. Weld a semi-circular ring lug 4 at the center of the connecting horizontal plate 3 so that its opening direction is perpendicular to the plate surface.

[0033] During installation, after the main hoisting wire rope is inserted into the U-shaped bend 2, the horizontal pin 1 is screwed in from the open side, so that the wire rope is enclosed in the U-shaped bend 2.

[0034] Pass a galvanized thin steel wire rope through the semi-circular lifting lug 4, and suspend the weight at the crane's lifting limit height using two rope clamps; loosen the two horizontal pins 1, insert the main lifting steel wire rope on the left side of the lifting mechanism's balance wheel into the U-shaped groove of the left U-shaped bend 2, and screw it into the left horizontal pin 1 into the pin hole 5 to lock it. Repeat the operation to insert the main lifting steel wire rope on the right side into the right U-shaped bend 2 and lock the horizontal pin 1.

[0035] Working principle: The galvanized thin steel wire rope passes through the lifting lug 4 and is fixed at an appropriate height on the crane. The counterweight keeps the two U-shaped bends 2 horizontal through the connecting horizontal plate 3. The main lifting steel wire rope is embedded in the U-shaped groove of the left and right U-shaped bends 2 respectively. The horizontal pin 1 is tightened to close the opening of the U-shaped bend 2, so that the steel wire rope is constrained in the bend 2. The rigid connection structure of the double bends 2 makes the torque of the steel wire rope on the bends 2 on both sides cancel each other out, effectively preventing entanglement.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A bridge crane up limit weight, comprising a shackle, characterized in that: There are two shackles arranged symmetrically. The shackles are respectively wrapped around the main lifting wire ropes on both sides of the balance wheel of the lifting mechanism. Each shackle includes a horizontal pin (1) and a U-shaped bend (2). The U-shaped bend (2) is arranged horizontally. The outer opening end of each of the two U-shaped bends (2) is provided with a pin hole (5) for the horizontal pin (1) to pass through. The inner side is threadedly connected to the horizontal pin (1). The U-shaped bends (2) are fixed together by a connecting horizontal plate (3). A semi-circular ring lifting lug (4) is provided at the center balance position of the top of the connecting horizontal plate (3). The opening direction of the semi-circular ring lifting lug (4) is perpendicular to the plane of the connecting horizontal plate (3).

2. A bridge crane up limit weight according to claim 1, characterized in that: The connecting horizontal plate (3) is welded and fixed to the U-shaped bend (2), and the welding point between the connecting horizontal plate (3) and the U-shaped bend (2) is located on the back of the closed end of the U-shaped bend (2).

3. A bridge crane up limit weight according to claim 2, characterized in that: The semi-circular annular lug (4) is welded and fixed to the connecting horizontal plate (3).

4. A bridge crane up limit weight according to claim 3, characterized in that: The horizontal pin (1) is threaded into the pin hole (5), and the horizontal pin (1) and the U-shaped bend (2) form a closed loop structure.

5. A bridge crane up limit weight according to claim 4, characterized in that: The inner width of the U-shaped bend (2) is greater than the diameter of the main lifting wire rope and less than twice the diameter of the wire rope.

6. A bridge crane up limit weight on a bridge crane according to claim 5, characterized in that: The end of the horizontal pin (1) is provided with an anti-loosening nut.

7. An upstop weight for a bridge crane according to claim 6, characterized in that: The inner wall of the U-shaped bend (2) is provided with a wear-resistant bushing (6), which is made of nylon or polyurethane.

8. A bridge crane up limit weight according to claim 7, characterized in that: A counterweight (7) is welded to the bottom of the connecting horizontal plate (3), and the counterweight (7) is made of cast iron.

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