Bulk cargo grab bucket lifting opening and closing mechanism for quayside container crane

Abstract

The utility model relates to a bulk cargo grab bucket lifting opening and closing mechanism for a quayside container crane, which belongs to the field of quayside container cranes and comprises a lifting appliance upper frame, a bulk cargo grab bucket lifting opening and closing structure, a steel wire rope chain and a four-rope bulk cargo grab bucket. The bulk cargo grab bucket lifting opening and closing mechanism is connected to the lower portion of the lifting tool upper frame, and the steel wire rope lock chain is connected between the bulk cargo grab bucket lifting opening and closing mechanism and the four-rope bulk cargo grab bucket. The bulk cargo grab bucket lifting opening and closing structure comprises a main body steel structure fixedly connected to the bottom of the lifting tool upper frame, a motor fixedly connected to the top of the main body steel structure and a coupler fixedly connected to an output shaft of the motor. According to the bulk cargo grab bucket lifting opening and closing mechanism for the quayside container crane, only one connector needs to be made for butt joint in a program, the technical improvement cost is greatly reduced, and a user only needs to purchase the bulk cargo grab bucket lifting opening and closing mechanism, so that function upgrading of multi-species operation can be achieved.

Description

Technical Field

[0001] The utility model relates to a bulk cargo grab bucket lifting and closing mechanism for a shore container crane, belonging to the field of shore container cranes. Background Art

[0002] In existing port operations, quayside container cranes primarily handle container loading and unloading. However, with the diversification of port operations, a single container-handling function is no longer sufficient to meet the diverse operational needs of terminals. While traditional multi-purpose cranes can handle a wide range of cargoes, including bulk cargo, containers, and general cargo, these devices typically require built-in functional mechanisms from the outset. For existing single-purpose cranes, upgrading their functionality often results in high technical costs and equipment obsolescence.

[0003] Currently, solutions to this problem, both domestically and internationally, mostly focus on purchasing new, multifunctional equipment or overhauling existing equipment. However, these solutions not only increase user investment costs but can also lead to waste and idleness of existing equipment. Therefore, a technical solution is urgently needed that preserves the functionality of existing equipment while enabling multi-species operations. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a bulk cargo grab bucket lifting and closing mechanism for a shore container crane, which has the advantages of reducing technical transformation costs, etc.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose of reducing technical transformation costs, the present invention provides the following technical solution: a bulk cargo grab lifting and closing mechanism for a shore container crane, comprising a spreader frame, a bulk cargo grab lifting and closing structure, a wire rope chain, and a four-cable bulk cargo grab, wherein the spreader frame is connected to the lifting drum of the crane, the bulk cargo grab lifting and closing mechanism is connected below the spreader frame, and the wire rope chain is connected between the bulk cargo grab lifting and closing structure and the four-cable bulk cargo grab;

[0008] The bulk grab bucket lifting and opening and closing structure includes a main steel structure fixedly connected to the bottom of the spreader upper frame, a motor fixedly connected to the top of the main steel structure, a coupling fixedly connected to the output shaft of the motor, a reducer fixedly connected to the other end of the coupling, and a wire rope reel fixedly connected to the power output end of the reducer;

[0009] The main steel structure is provided with a redirecting pulley and a lug plate.

[0010] Furthermore, the four corners of the main steel structure are fixedly connected with columns, each column has a locking pin hole above it, and the four corners of the bottom of the sling upper frame are respectively provided with locking pins that are compatible with the locking pin holes.

[0011] Furthermore, the wire rope chain is divided into a wire rope end and a chain end, and one end of the wire rope end is fixedly connected to the wire rope reel, and the other end of the wire rope end is wound through the redirecting pulley and the pulley group in the four-rope bulk cargo grab, and one end of the chain end is fixedly connected to the ear plate, and the other end of the chain end is fixedly connected to the lifting joint of the four-rope bulk cargo grab.

[0012] Furthermore, the motor is a variable frequency motor, and the motor is fixedly connected to the top of the main steel structure by high-strength bolts.

[0013] Furthermore, an encoder is installed at the tail of the motor, and a wear-resistant layer is provided on the rim surface of the redirecting pulley.

[0014] Furthermore, the reducer has forward and reverse rotation functions to realize the retraction and extension of the wire rope chain.

[0015] Furthermore, a weight sensor is provided at the connection between the ear plate and the chain end of the wire rope chain.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the utility model provides a bulk cargo grab bucket lifting and closing mechanism for a shore container crane, which has the following beneficial effects:

[0018] The bulk cargo grab bucket lifting and closing mechanism for the shore container crane only requires an interface docking in the program, which greatly reduces the cost of technical transformation. Users only need to purchase the bulk cargo grab bucket lifting and closing mechanism of the present invention to achieve functional upgrades for multi-species operations. The bulk cargo grab bucket lifting and closing mechanism of the utility model can be seamlessly connected to the sling rack of the original equipment without any modification to the original equipment, thereby retaining the operating function of the original equipment, which means that while upgrading the multi-species operating function, the container loading and unloading function of the original equipment can still be fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the main view of the utility model;

[0020] Figure 2 This is a top view of the utility model;

[0021] Figure 3 It is a side view of the upper frame of the sling and the main steel structure of the structure of the utility model;

[0022] Figure 4The utility model discloses a side view of the bulk cargo grab lifting opening and closing structure.

[0023] In the drawing: 1, lifting appliance upper frame; 2, steel wire rope chain; 3, four-cable bulk cargo grab; 4, main body steel structure; 5, motor; 6, coupling; 7, speed reducer; 8, steel wire rope reel; 9, redirecting pulley; 10, lug plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative work belong to the range protected by the utility model.

[0025] Please refer to Figures 1 to 4 The utility model provides technical scheme: shore container crane uses bulk cargo grab lifting opening and closing mechanism, including lifting appliance upper frame 1, bulk cargo grab lifting opening and closing structure, steel wire rope chain 2 and four cable bulk cargo grab 3, lifting appliance upper frame 1 is connected in the lifting drum of crane, bulk cargo grab lifting opening and closing mechanism is connected in lifting appliance upper frame 1 below, steel wire rope chain 2 is connected between bulk cargo grab lifting opening and closing structure and four cable bulk cargo grab 3.

[0026] As Figure 1 Shown, bulk cargo grab lifting opening and closing structure includes the main body steel structure 4 of fixed connection in the bottom of lifting appliance upper frame 1, the motor 5 of fixed connection in the top of main body steel structure 4, the coupling 6 of fixed connection in the output shaft of motor 5, the speed reducer 7 of fixed connection in another end of coupling 6 and the steel wire rope reel 8 of fixed connection in the power output end of speed reducer 7.

[0027] Main body steel structure 4 is provided with redirecting pulley 9 and lug plate 10, and redirecting pulley 9 is used to change the running direction of steel wire rope, to avoid the deviation of steel wire rope to appear pulling force.

[0028] It should be noted that the main body steel structure 4 is made of high-strength steel, which has good carrying capacity and anti-deformation ability, ensuring the stability and safety of the mechanism during operation, and the main body steel structure 4 is fixedly connected with a stand at each corner, and each stand has a lock pin hole above it, and the four corners of the bottom of the lifting appliance upper frame 1 are provided with lock pins matched with the lock pin holes.

[0029] The steel wire rope chain 2 is divided into a steel wire rope end and a chain end, one end of the steel wire rope end is fixedly connected to the steel wire rope reel 8, the other end of the steel wire rope end is wound through the redirecting pulley 9 and the pulley set in the four-cable bulk cargo grab 3, one end of the chain end is fixedly connected to the lug plate 10, and the other end of the chain end is fixedly connected to the lifting connector of the four-cable bulk cargo grab 3.

[0030] The motor 5 is a variable frequency motor, and the motor 5 is fixedly connected to the top of the main steel structure 4 by high-strength bolts.

[0031] An encoder is installed at the tail of the motor 5 to accurately control the number of rotations of the wire rope reel 8, thereby controlling the retraction and release length of the wire rope and realizing automatic opening and closing of the grab bucket. The rim surface of the redirecting pulley 9 is provided with a wear-resistant layer.

[0032] The speed reducer 7 has forward and reverse rotation functions to realize the retraction and extension of the wire rope chain 2.

[0033] A weight sensor is provided at the connection between the ear plate 10 and the chain end of the wire rope chain 2, which is used to monitor the tension on the chain in real time, so as to judge whether the wire rope reel 8 is over-reeling or releasing the rope too long, ensuring the safety and stability of the grab bucket throughout the process.

[0034] The working principle of the above embodiment is:

[0035] First, the spreader frame 1 is an accessory on the original shore container crane. The spreader is wound into the pulley through the wire rope drum at its upper end to achieve the lifting and lowering of the spreader. The bulk grab lifting and closing structure is connected to the spreader frame 1;

[0036] When the four-cable bulk cargo grab 3 needs to be operated, the motor 5 is started and the power is transmitted to the reducer 7 through the coupling 6. The reducer 7 then reduces the power and transmits it to the wire rope reel 8, causing the wire rope reel 8 to rotate forward and reverse. The wire rope end of the wire rope chain 2 is wound around the wire rope reel 8. As the wire rope reel 8 rotates forward and reverse, the wire rope end will be retracted and released accordingly.

[0037] The chain end of the wire rope chain 2 is connected to the four-rope bulk cargo grab 3 through the redirecting pulley 9. Therefore, when the wire rope chain 2 is retracted or extended, it will drive the four-rope bulk cargo grab 3 to open and close. At the same time, in order to ensure the synchronous lifting and lowering of the four-rope bulk cargo grab 3 and the bulk cargo grab lifting and closing structure, the four-rope bulk cargo grab 3 is also connected to the ear plate 10 of the bulk cargo grab lifting and closing structure through the chain end of the wire rope chain 2.

[0038] In addition, the utility model also installs an encoder at the tail of the motor 5 to control the two state points of the wire rope chain 2 in the length direction, namely the fully open and fully closed states of the four-rope bulk cargo grab 3. The encoder transmits the signals of these two extreme states to the control system, thereby realizing the automatic opening and automatic closing control actions of the four-rope bulk cargo grab 3, and a weight sensor is provided at the connection between the ear plate 10 and the chain end of the wire rope chain 2 to monitor the tension of the chain in real time, so as to determine whether the wire rope reel 8 is over-retracted or over-released, and ensure that the grab always maintains the state required by the control program during the entire process.

[0039] The electrical components are electrically connected to the main controller and the power supply. The main controller can be a computer or other known device that is controlled. The electrical connections are known in the art and will not be described in detail.

[0040] It should be noted that the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0041] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A bulk cargo grab bucket lifting and closing mechanism for a shore container crane, comprising a sling frame (1), a bulk cargo grab bucket lifting and closing structure, a wire rope chain (2), and a four-cable bulk cargo grab bucket (3), characterized in that: The sling upper frame (1) is connected to the lifting drum of the crane, the bulk cargo grab lifting and closing mechanism is connected below the sling upper frame (1), and the wire rope chain (2) is connected between the bulk cargo grab lifting and closing structure and the four-cable bulk cargo grab (3); The bulk grab bucket lifting and opening and closing structure comprises a main steel structure (4) fixedly connected to the bottom of the sling upper frame (1), a motor (5) fixedly connected to the top of the main steel structure (4), a coupling (6) fixedly connected to the output shaft of the motor (5), a reducer (7) fixedly connected to the other end of the coupling (6), and a wire rope reel (8) fixedly connected to the power output end of the reducer (7); The main steel structure (4) is provided with a redirecting pulley (9) and a lug plate (10).

2. The bulk cargo grab bucket lifting and closing mechanism for a shore container crane according to claim 1, characterized in that: The four corners of the main steel structure (4) are respectively fixedly connected with columns, and there is a locking pin hole above each column. The four corners of the bottom of the sling upper frame (1) are respectively provided with locking pins adapted to the locking pin holes.

3. The bulk cargo grab bucket lifting and closing mechanism for a shore container crane according to claim 1, characterized in that: The wire rope chain (2) is divided into a wire rope end and a chain end, and one end of the wire rope end is fixedly connected to the wire rope reel (8), and the other end of the wire rope end is wound through a redirecting pulley (9) and a pulley group in a four-rope bulk cargo grab (3), and one end of the chain end is fixedly connected to an ear plate (10), and the other end of the chain end is fixedly connected to a lifting joint of the four-rope bulk cargo grab (3).

4. The bulk cargo grab bucket lifting and closing mechanism for a shore container crane according to claim 1, characterized in that: The motor (5) is a variable frequency motor, and the motor (5) is fixedly connected to the top of the main steel structure (4) via high-strength bolts.

5. The bulk cargo grab bucket lifting and closing mechanism for a shore container crane according to claim 1, characterized in that: An encoder is installed at the tail of the motor (5), and a wear-resistant layer is provided on the rim surface of the redirecting pulley (9).

6. The bulk cargo grab bucket lifting and closing mechanism for a shore container crane according to claim 1, characterized in that: The speed reducer (7) has forward and reverse rotation functions to realize the retraction and extension of the wire rope chain (2).

7. The bulk cargo grab bucket lifting and closing mechanism for a shore container crane according to claim 1, characterized in that: A weight sensor is provided at the connection between the ear plate (10) and the chain end of the wire rope chain (2).

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