High limiting device of double-beam crane

Abstract

The utility model discloses a high limiting device of a double-beam crane, which comprises a double-beam frame, an electric hoist for hoisting an object is arranged on the double-beam frame, and a heavy hammer balancing weight for preventing a lifting hook from being overwound is sleeved on a steel wire wound on the electric hoist. According to the utility model, the upper end and the lower end of the counter weight block are fixed by the vertical plates, and the limiting rod is of a U-shaped structure, so that a certain swinging inertia can be generated in the moving process of an article when the electric hoist is used for winding and unwinding a steel wire rope and hoisting the article by a lifting hook to suspend and move; the steel wire rope swings in the cavity between the semicircular check block and the heavy hammer balancing weight, the limiting rods with the U-shaped structures at the upper end and the lower end of the heavy hammer balancing weight can be used for limiting swinging of the steel wire rope, and therefore the steel wire rope in the cavity between the semicircular check block and the heavy hammer balancing weight can be kept in a vertical state. Therefore, the phenomenon of collision and abrasion between the counter weight and the counter weight block is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and in particular relates to a high limiting device for a double-beam crane. Background Art

[0002] Bridge cranes are widely used in indoor and outdoor warehouses, factories, docks, open-air storage yards and other places to lift materials without being hindered by ground equipment. In order to ensure the safe operation of the overhead crane, a weight limit device is usually installed. When the hook is lifted to the limit position, the power supply can be automatically cut off to prevent problems such as the hook rushing through the winch, the hook wire rope being disconnected, and the sling falling. The existing weight counterweight is a solid rectangular structure, and the hook wire rope is close to the outer surface of the weight counterweight, with a large contact area. Because the surface of the hook wire rope is coated with butter, the hook wire rope is easy to stick to the outer surface of the weight counterweight during the rising or falling process, which can cause damage to the limit switch.

[0003] To this end, a crane weight limit device with announcement number "CN213326313U" includes a limit switch, a weight counterweight and a weight wire rope, the limit switch and the weight counterweight are connected through the weight wire rope; the weight counterweight includes a body, the body is formed by bending a cylinder to form a structure with an opening; one end of the body is provided with a first connection part, and the other end is provided with a second connection part; the first connection part and the second connection part arranged at intervals are connected through a locking member; the body and the locking member form a limit space. The limit space formed by the body of the weight counterweight and the screw limits the hook wire rope, reduces the contact area between the hook wire rope and the weight counterweight, and increases the mass of the weight counterweight, so as to avoid the weight counterweight and the hook wire rope from sticking and entanglement.

[0004] However, for the above-mentioned overhead crane weight limiting device, although the limiting space surrounded by the body of the weight counterweight and the screw limits the hook wire rope and reduces the contact area between the hook wire rope and the weight counterweight, the following obvious defects still exist during use: when the steel wire is used to lift and move objects using the hook, the objects suspended in the air will produce a large swing, and there is no component to limit the swing of the steel wire rope in the weight counterweight, so that the steel wire rope and the weight counterweight will still collide, causing the weight counterweight to wear. Utility Model Content

[0005] The purpose of the utility model is to provide a high limit device for a double-beam crane to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high limit device of a double-beam crane, comprising a double-beam frame, an electric hoist for lifting objects is provided on the double-beam frame, a heavy hammer counterweight block for preventing the hook from overwinding is sleeved on the steel wire wound by the electric hoist, one side of the heavy hammer counterweight block is connected to a heavy hammer limit switch installed on one side of the bottom of the double-beam frame and used for lifting and limiting the lifting of the lifting steel wire, one side of the heavy hammer counterweight block is provided with a semicircular stopper for clamping the lifting steel wire in the heavy hammer counterweight block, the upper and lower ends of the heavy hammer counterweight block are provided with limit rods with a U-shaped structure for limiting the swing of the lifting steel wire, and the corresponding surfaces of the semicircular stopper and the heavy hammer counterweight block are provided with cleaning brushes for cleaning impurities on the surface of the inverted steel wire.

[0007] Preferably, a circular arc-shaped suspension rod is installed on the limit rotating rod of the weight limit switch, and a hammer body is provided at one end of the suspension rod, so that the weight limit switch can play the role of limiting the lifting of the hook and controlling the start and stop of the electric hoist.

[0008] Preferably, the left side surface of the weight counterweight block is provided with a strip-shaped weight strip, and the surface of the weight strip is provided with a strip-shaped weight slide groove, which can enable the weight strip to maintain vertical stability and prevent longitudinal swinging.

[0009] Preferably, the other end of the suspension rod is penetrated by a limit sliding pin, and the limit sliding pin is slidably set in a weight sliding groove in the weight strip, so that the weight counterweight block moves up for adjustment when contact friction occurs with the wire rope.

[0010] Preferably, one end of the limit rod is fixed to the vertical plate by a screw, and one end of the vertical plate is fixed to the upper and lower surfaces of the weight counterweight block, which is used to limit the swing of the wire rope in the weight counterweight block to avoid collision and friction inside it.

[0011] Preferably, a lifting hook for lifting objects is provided on the steel wire rope in the electric hoist, and load-bearing steel beam brackets are provided on the bottom sides of both ends of the double-beam frame at the bottom end of the electric hoist to improve the stability of the double-beam crane during operation.

[0012] Preferably, a semicircular groove is provided on one side of the weight counterweight corresponding to the semicircular stopper, and the cleaning brush is evenly arranged on the inner side of the semicircular groove and the semicircular stopper for cleaning surface impurities of the wire rope, and is used for surface cleaning of the wire rope passing through the weight counterweight during winding.

[0013] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the high limit device of the double-beam crane is fixed with vertical plates at the upper and lower ends of the weight counterweight and is a limit rod with a U-shaped structure, so that when the electric hoist retracts and releases the wire rope and uses the hook to lift objects in the air for movement, a certain swinging inertia will be generated during the movement of the objects, allowing the wire rope to swing in the cavity between the semicircular stopper and the weight counterweight, and the limit rod with a U-shaped structure at the upper and lower ends of the weight counterweight can be used to limit the swing of the wire rope, so that the wire rope in the cavity between the semicircular stopper and the weight counterweight can be kept in a vertical state, so that there will be no collision and wear between the weight counterweight and the semicircular stopper and the weight counterweight, and the semicircular stopper and the weight counterweight can be effectively protected against collision and friction, thereby improving the service life of the semicircular stopper and the weight counterweight.

[0014] The cleaning brushes arranged in the semicircular block and the internal cavity of the heavy hammer counterweight can clean the wire rope that passes through the cavity for retraction and extension, thereby achieving the effect of cleaning impurities on the surface of the wire rope, thereby reducing the phenomenon of impurities and wire rope wear between the wire rope wound by the electric hoist. The limiting sliding pin at one end of the suspension rod is used to limit the sliding of the heavy hammer in the heavy hammer strip, so that the heavy hammer counterweight can be limited longitudinally during the longitudinal swing of the steel wire, and the longitudinal swing contact wear between the heavy hammer counterweight and the wire rope can be effectively avoided with the support of the limiting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the exploded structure of the weight counterweight and weight limit switch of the utility model;

[0017] Figure 3 It is a schematic diagram of the top view of the structure of the heavy hammer counterweight and the semicircular stopper of the utility model.

[0018] In the figure: 1. Double beam frame; 2. Electric hoist; 3. Counterweight block of heavy hammer; 4. Limit switch of heavy hammer; 5. Semicircular stopper; 6. Limit rod; 7. Cleaning brush; 8. Hanging rod; 9. Hammer body; 10. Heavy hammer strip; 11. Heavy hammer slide; 12. Limit slide pin; 13. Vertical plate; 14. Lifting hook; 15. Load-bearing steel beam bracket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution: a high limit device of a double-beam crane, comprising a double-beam frame 1, wherein the double-beam frame 1 is provided with an electric hoist 2 for hoisting an object, so that the electric hoist 2 retracts and releases the wire rope to lift the lifting hook 14, so that the lifting and moving of the goods to a designated position for placement can be realized, and a heavy hammer counterweight 3 for preventing the hook from overwinding is sleeved on the steel wire wound by the electric hoist 2, and the heavy hammer counterweight 3 is designed to respond to the position or movement state of the steel wire rope in the electric hoist 2 to realize the limit control function, when the controlled steel wire rope and the lifting hook 14 reach a specific position or state, the movement of the heavy hammer counterweight 3 will cause the state of the heavy hammer limit switch 4 to change, thereby controlling or stopping the corresponding movement or operation, and one side of the heavy hammer counterweight 3 is connected to a heavy hammer limit switch 4 installed on one side of the bottom of the double-beam frame 1 and used to lift and limit the lifting steel wire. A position switch 4 is provided. When the hook of the crane reaches a preset height or position, or when the boom reaches the maximum extension or contraction range, the switch will be triggered to prevent further movement, thereby avoiding exceeding the safety limit or the maximum load-bearing capacity of the equipment. A semicircular stopper 5 is provided on one side of the weight counterweight 3 for clamping the lifting wire in the weight counterweight 3. The semicircular stopper 5 is used to limit the wire rope within one side of the weight counterweight 3 to avoid separation. A limiting rod 6 with a U-shaped structure is provided at the upper and lower ends of the weight counterweight 3 to limit the swing of the lifting wire. The limiting rod 6 is used to limit the two ends of the wire rope passing through the weight counterweight 3 to avoid friction damage. The corresponding surfaces of the semicircular stopper 5 and the weight counterweight 3 are provided with a cleaning brush 7 for cleaning impurities on the surface of the inverted wire, which can reduce the greater friction generated by the winding and release of the wire rope.

[0021] The limit rotating rod of the heavy hammer limit switch 4 is installed with a circular arc-shaped suspension rod 8, which can make the suspension rod 8 balance and support the hammer body part 9, and is conducive to limiting the triggering of the heavy hammer limit switch 4. One end of the suspension rod 8 is provided with a hammer body part 9, which can keep the heavy hammer counterweight block 3 vertical on the wire rope and reduce the shaking of the heavy hammer counterweight block 3. The left side of the heavy hammer counterweight block 3 is provided with a strip-shaped heavy hammer strip 10, which can make the heavy hammer counterweight block 3 stably limit the lifting height of the lifting hook part 14. The surface of the heavy hammer strip 10 is provided with a strip-shaped heavy hammer slide 11, which can keep the heavy hammer strip 10 moving vertically up and down, so that the heavy hammer counterweight block 3 can keep vertical and level. The other end of the suspension rod 8 is penetrated with a limit slide pin 12 to prevent the weight plate 10 from falling off from the suspension rod 8 when sliding. The limit slide pin 12 is slidably set in the weight slide groove 11 in the weight plate 10, so that the weight plate 10 can slide vertically up and down, and play the role of limiting the longitudinal swing of the weight counterweight 3. When the weight counterweight 3 is subjected to external forces, the weight plate 10 can transmit these forces to the weight limit switch 4, triggering the action of the switch, thereby realizing the control and restriction of the movement of the crane, and the weight plate 10 can be adjusted according to specific needs to ensure the appropriate position and spacing between the weight counterweight 3 and the weight limit switch 4. By adjusting the length of the weight plate 10, the positional relationship between the weight counterweight 3 and the weight limit switch 4 can be accurately controlled, thereby ensuring the normal operation and safety of the system.

[0022] One end of the limit rod 6 is fixed with a vertical plate 13 by screws, and the vertical plate 13 is symmetrically provided with through-fixing holes, which are used to fix the two ends of the limit rod 6 on the vertical plate 13 by screws. One end of the vertical plate 13 is fixed to the upper and lower surfaces of the heavy hammer counterweight 3, which can effectively avoid the phenomenon of wear of the wire rope and the heavy hammer counterweight 3 during the swinging process. The wire rope in the electric hoist 2 is provided with a lifting hook 14 for lifting objects, and the lifting hook 14 is lifted and lowered by the cooperation of the pulley and the wire rope. , so that the objects can be hoisted by the lifting hook 14, the bottom sides of the two ends of the double beam frame 1 at the bottom of the electric hoist 2 are provided with load-bearing steel beam brackets 15, which strengthen the stability of the hoisting equipment on the load-bearing steel beam bracket 15, and the heavy hammer counterweight block 3 is provided with a semicircular groove on one side corresponding to the semicircular stopper 5, and the cleaning brush 7 is evenly arranged on the inner side of the semicircular groove and the semicircular stopper 5 for cleaning the surface impurities of the wire rope, which is used to clean the impurities on the surface of the wire rope, reduce the friction between the wire ropes, and increase the service life of the wire rope.

[0023] Specifically, when in use, first install the weight limit switch 4 on one side of the bottom of the double beam frame 1, and use the weight slide groove 11 and the limit slide pin 12 at one end of the suspension rod 8 to fix the weight counterweight 3 on one side of the bottom end of the weight plate 10, then limit the wire rope on one side of the electric hoist 2 to one end of the weight counterweight 3, and lock the semicircular stopper 5 on one side of the weight counterweight 3 by screws to limit the wire rope. When the hook of the crane reaches the preset height or position and reaches the maximum extension and contraction range, the weight limit switch 4 will be triggered to prevent further movement, thereby avoiding the effect of exceeding the safety limit. When the electric hoist 2 uses the lifting hook 14 to lift the object in the air for movement by retracting the wire rope, the object will be A certain swinging inertia is generated to allow the wire rope to swing in the cavity between the semicircular stopper 5 and the heavy hammer counterweight 3. The limit rods 6 with U-shaped structures at the upper and lower ends of the heavy hammer counterweight 3 can be used to limit the swing of the wire rope, so that the wire rope in the cavity between the semicircular stopper 5 and the heavy hammer counterweight 3 can be kept in a vertical state, so that there will be no collision and wear between the heavy hammer counterweight 3, and the heavy hammer counterweight 3 can be effectively protected against collision and friction, thereby improving the service life of the heavy hammer counterweight 3. At the same time, the cleaning brush 7 arranged in the internal cavity of the semicircular stopper 5 and the heavy hammer counterweight 3 can clean the wire rope that passes through the cavity for retraction and release, thereby reducing the generation of impurities between the wire ropes wound by the electric hoist 2 and the wear of the wire ropes.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-beam crane high limit device, comprising a double-beam frame (1), wherein the double-beam frame (1) is provided with an electric hoist (2) for hoisting an object, wherein: A heavy hammer counterweight (3) is sleeved on the steel wire wound by the electric hoist (2) to prevent the hook from overwinding; one side of the heavy hammer counterweight (3) is connected to a heavy hammer limit switch (4) installed on one side of the bottom of the double beam frame (1) and used for lifting and limiting the lifting steel wire; one side of the heavy hammer counterweight (3) is provided with a semicircular stopper (5) for clamping the lifting steel wire in the heavy hammer counterweight (3); upper and lower ends of the heavy hammer counterweight (3) are provided with limit rods (6) of a U-shaped structure for limiting the swing of the lifting steel wire; and the surfaces corresponding to the semicircular stopper (5) and the heavy hammer counterweight (3) are both provided with a cleaning brush (7) for cleaning impurities on the surface of the inverted steel wire.

2. A double beam crane high limit device according to claim 1, characterized in that: A circular arc-shaped suspension rod (8) is installed on the limit rotating rod of the heavy hammer limit switch (4), and a hammer body (9) is provided at one end of the suspension rod (8).

3. A double beam crane high limit device according to claim 2, characterized in that: A strip-shaped weight strip (10) is provided on the left side of the weight counterweight block (3), and a strip-shaped weight slide groove (11) is provided on the surface of the weight strip (10).

4. A double beam crane high limit device according to claim 3, characterized in that: The other end of the suspension rod (8) is inserted into a limit sliding pin (12), and the limit sliding pin (12) is slidably arranged in a weight sliding groove (11) in the weight strip (10).

5. The high limit device of a double-beam crane according to claim 1 is characterized in that: One end of the limit rod (6) is fixed with a vertical plate (13) by means of screws, and one end of the vertical plate (13) is fixed to the upper and lower surfaces of the heavy hammer counterweight (3).

6. A double beam crane high limit device according to claim 1, characterized in that: A lifting hook (14) for lifting objects is provided on the steel wire rope in the electric hoist (2), and load-bearing steel beam brackets (15) are provided on the bottom sides of both ends of the double beam frame (1) at the bottom end of the electric hoist (2).

7. A double beam crane high limit device according to claim 1, characterized in that: A semicircular groove is formed on one side of the weight counterweight (3) corresponding to the semicircular stopper (5), and the cleaning brush (7) is evenly arranged on the inner side of the semicircular groove and the semicircular stopper (5) for cleaning impurities on the surface of the steel wire rope.

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