A lifting device for an electric double-girder crane

Abstract

This utility model discloses a lifting device for an electric double-girder crane, including a support frame, a ground fixing mechanism, an extension fixing mechanism, and an external tensioning mechanism. The ground fixing mechanism includes a ground plate and a mounting plate. The extension fixing mechanism includes an extension rod. The external tensioning mechanism includes an external support rod and a tension rod. The ground fixing mechanism provides a solid foundation support through the ground plate and mounting plate, increasing the contact area with the ground and preventing the device from sinking. The ground rod penetrates deep into the ground to form an effective anchoring effect. The extension fixing mechanism uses a clever combination of the extension rod, a thrust spring, and a locking block to achieve quick connection and separation. The external tensioning mechanism significantly increases the support area and stability of the device through the coordinated work of the external support rod and the tension rod. When the extension rod penetrates into the hollowed-out ground rod, it pushes the external support rod to expand outward, thereby causing the tension rod to open and form a larger support structure.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and more specifically, to a lifting device for an electric double-girder crane. Background Technology

[0002] In existing electric double-girder crane technology, although the lifting device design enables the lifting and lowering of heavy objects, the fixed position after the crane is moved or relocated still presents certain inconveniences. This problem, in some special situations or operating environments, may adversely affect the safety, stability, and efficiency of the equipment, thereby impacting the performance of the entire operating system.

[0003] Electric double girder cranes are typically used in situations requiring the movement of heavy objects over large areas. When relocating or moving the crane, especially in complex or confined working environments, ensuring the crane's accurate positioning and stability is crucial. However, many current electric double girder cranes rely on manual locking, mechanical fixing, or traditional hydraulic support systems for their lifting mechanisms. These methods often require excessive manual intervention, making operation cumbersome and time-consuming.

[0004] During crane movement, precise positioning after relocation is crucial, and the fixing process often relies on manual labor or traditional mechanical devices for adjustment. Even slight shifts in crane position can prevent timely adjustment or precise locking of the fixing devices, potentially leading to equipment instability and even safety hazards. In high-load, high-precision environments such as ports, heavy industrial manufacturing, or large-scale warehousing and logistics, accurate positioning after relocation is fundamental to ensuring operational safety and efficiency. Utility Model Content

[0005] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a lifting device for an electric double girder crane to solve the technical problems mentioned in the background art, such as the inconvenience of fixing the position of the crane after relocation or movement.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A lifting device for an electric double-girder crane, comprising a support frame, a foot fixing mechanism, an extension fixing mechanism, and an external tensioning mechanism. The foot fixing mechanism includes a foot plate and a mounting plate. The foot plate is installed at the bottom end of the support frame, and the mounting plate is fixedly installed on the foot plate. A fixing ring is installed at the top end of the mounting plate, and a ground anchor is installed at the bottom end of the mounting plate. A mating block is installed on the inner wall of the fixing ring. The extension fixing mechanism includes an extension rod, one end of which can extend into the fixing ring. A thrust spring is installed at the outer end of the extension rod, and a locking block is installed at one end of the thrust spring. One end of the locking block pushes against the inner wall of the fixing ring, so that the locking block and the mating block are relatively fixed. An unlocking ring is slidably installed on the inner wall of the fixing ring, and a screw push ring is slidably installed on the outer wall of the fixing ring. The screw push ring and the unlocking ring are linked. An outer rotating frame is rotatably installed on the outer wall of the fixing ring, and the outer rotating frame is threadedly connected to the screw push ring. The unlocking ring can push the locking block back into the extension rod.

[0007] The present invention is further configured such that the external tensioning mechanism includes an external support rod and a tension rod, the interior of the ground anchor rod is hollowed out, multiple sets of tension rods are rotatably installed on the side wall of the ground anchor rod, a tensioning spring is provided between one end of the tension rod and the outer wall of the ground anchor rod, multiple sets of external support rods are slidably installed on the side wall of the ground anchor rod, one end of the extension rod extends into the ground anchor rod, so that the external support rods are outwardly supported, and one end of the external support rod pushes the tension rod to open.

[0008] The present invention is further configured such that a double beam frame is installed at the top end of the support frame, and an electric hoist is rolled on the double beam frame. The double beam frame is installed at the top of the support frame to provide a running track for the electric hoist, thereby increasing the load-bearing capacity and stability of the device and realizing the core function of the crane.

[0009] The present invention is further configured such that a driving ring is installed at the top end of the outer rotating frame, and a double-layer clamping ring is fixedly installed on the outer wall of the fixed ring. The driving ring is limited to rotating within the double-layer clamping ring. The driving ring is installed at the top of the outer rotating frame to increase the operating area. The limited rotation within the double-layer clamping ring improves the operating accuracy. In conjunction with the bidirectional spring rod, it achieves graded positioning.

[0010] The present invention is further configured such that a positioning hole is provided on the double-layer clamping ring, and a bidirectional spring rod is installed on the driving ring, and the bidirectional spring rod extends into the positioning hole step by step, so that the outer rotating frame rotates stably.

[0011] The present invention is further configured such that a directional groove is provided on the fixed ring, and the screw pusher and the unlocking ring are configured to slide and guide in conjunction with the directional groove. The directional groove is provided on the fixed ring and cooperates with the screw pusher and the unlocking ring to provide sliding guidance, ensure the accuracy of the movement direction, and enhance the reliability of the linkage mechanism.

[0012] The present invention is further configured such that a retraction groove is provided on the outer wall of the ground anchor rod, and the tension spring can pull the tension rod back into the retraction groove. The retraction groove is provided on the outer wall of the ground anchor rod to provide a space for the retracted tension rod, protect the tension rod, avoid damage, make the structure more compact, and facilitate movement.

[0013] The present invention is further configured such that a pressing plate is installed at one end of the extension rod, thereby increasing the operating area and facilitating the pushing of the extension rod.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention provides a lifting device for an electric double-girder crane, which has the following beneficial effects: This utility model is equipped with a foot fixing mechanism, which provides a solid foundation support through the foot plate and mounting plate, increases the contact area with the ground, prevents the device from sinking, and the ground anchoring rod penetrates deep into the ground to form an effective anchoring effect. The design of the fixing ring and the mating block provides a precise docking interface for the extension into the fixing mechanism, which greatly improves the stability and safety of the entire crane, ensures that it will not overturn when carrying heavy objects, and provides reliable protection for high-altitude operations.

[0015] This utility model features an insertion and fixing mechanism that cleverly combines an insertion rod, a push spring, and a locking block to achieve rapid connection and separation. The insertion rod can be easily inserted into the fixing ring, and the locking block, under the action of the push spring, forms a firm lock with the mating block. The linkage unlocking system, consisting of the unlocking ring, the screw push ring, and the outer rotating frame, converts the rotation operation into thrust, causing the locking block to retract into the insertion rod, achieving rapid unlocking. This simplifies the installation and disassembly process, improves work efficiency, and ensures the reliability and safety of the connection.

[0016] This invention features an external tensioning mechanism. Through the coordinated operation of the external support rod and the tension rod, the external tensioning mechanism significantly increases the support area and stability of the device. When the extension rod penetrates deep into the hollowed-out ground support rod, it pushes the external support rod to expand outward, thereby causing the tension rod to open and form a larger support structure. The design of the tension spring and the retraction groove ensures that the tension rod can be easily retracted, facilitating the storage and movement of the device. This greatly improves the crane's anti-tipping ability and safety, making it particularly suitable for use in different terrain conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model; Figure 2 This is a schematic diagram of the foundation fixing mechanism in this utility model; Figure 3 This is a schematic diagram of the structure of the insertion fixing mechanism and the external expansion mechanism in this utility model; Figure 4 This is a schematic diagram of the structure inside the fixing mechanism and the external tensioning mechanism of this utility model; Figure 5 This is a schematic diagram of the internal structure of the external tensioning mechanism in this utility model.

[0018] In the diagram: 1. Support frame; 2. Base plate; 3. Mounting plate; 4. Fixing ring; 5. Mating block; 6. Insertion rod; 7. Thrust spring; 8. Locking block; 9. Unlocking ring; 10. Screw push ring; 11. External rotating frame; 12. External support rod; 13. Tension rod; 14. Double beam frame; 15. Electric hoist; 16. Drive ring; 17. Double-layer clamping ring; 18. Positioning hole; 19. Two-way spring rod; 20. Orientation groove; 21. Retraction groove; 22. Pressing plate; 101. Ground anchor rod; 201. Tightening spring. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0022] Please see Figures 1-5A lifting device for an electric double-girder crane includes a support frame 1, a foot fixing mechanism, an extension fixing mechanism, and an external tensioning mechanism. The foot fixing mechanism includes a foot plate 2 and a mounting plate 3. The foot plate 2 is installed at the bottom end of the support frame 1, and the mounting plate 3 is fixedly installed on the foot plate 2. A fixing ring 4 is installed at the top end of the mounting plate 3, and a ground anchoring rod 101 is installed at the bottom end of the mounting plate 3. A mating block 5 is installed on the inner wall of the fixing ring 4. The extension fixing mechanism includes an extension rod 6, one end of which can extend into the fixing ring 4. A push spring 7 is installed on the outer end of the insertion rod 6. A locking block 8 is installed on one end of the push spring 7. One end of the locking block 8 pushes against the inner wall of the fixed ring 4, so that the locking block 8 is relatively fixed with the mating block 5. An unlocking ring 9 is slidably installed on the inner wall of the fixed ring 4. A screw push ring 10 is slidably installed on the outer wall of the fixed ring 4. The screw push ring 10 and the unlocking ring 9 are linked. An outer rotating frame 11 is rotatably installed on the outer wall of the fixed ring 4, and the outer rotating frame 11 is threadedly connected to the screw push ring 10. The unlocking ring 9 can push the locking block 8 to retract into the insertion rod 6.

[0023] In this embodiment, the anchor fixing mechanism serves as the basic support system for the entire device. The anchor plate 2 is installed at the bottom of the support frame 1, providing initial support area. The mounting plate 3 is fixed to the anchor plate 2, increasing structural stability. The fixing ring 4 is installed on the top of the mounting plate 3, providing a docking interface for the extension rod 6. The ground anchoring rod 101 is installed at the bottom of the mounting plate 3, penetrating deep into the ground to provide anchoring. The mating block 5 on the inner wall of the fixing ring 4 cooperates with the locking block 8 on the extension rod 6 to form a firm connection. The extension fixing mechanism realizes the device's... For quick connection and separation, one end of the extension rod 6 extends into the fixed ring 4 and forms a connection with the fixed ring 4. The push spring 7 at the outer end of the extension rod 6 pushes the locking block 8, causing one end of the locking block 8 to push against the inner wall of the fixed ring 4. The locking block 8 and the mating block 5 are relatively fixed to achieve a firm lock. When unlocking is required, the outer rotating frame 11 is rotated, which drives the screw push ring 10 to move through the threaded connection. The screw push ring 10 is linked with the unlocking ring 9, which pushes the locking block 8 back into the extension rod 6. The locking block 8 disengages from the mating block 5, and the extension rod 6 can be pulled out from the fixed ring 4.

[0024] The external tensioning mechanism includes an external support rod 12 and a tension rod 13. The interior of the ground anchor rod 101 is hollowed out. Multiple sets of tension rods 13 are rotatably mounted on the side wall of the ground anchor rod 101. A tensioning spring 201 is connected between one end of the tension rod 13 and the outer wall of the ground anchor rod 101. Multiple sets of external support rods 12 are slidably mounted on the side wall of the ground anchor rod 101. One end of the extension rod 6 extends into the ground anchor rod 101, causing the external support rods 12 to extend outward. One end of the external support rod 12 pushes the tension rod 13 to open.

[0025] In this embodiment, the external tensioning mechanism provides extended stability for ground support. The ground anchor 101 has a hollow design inside, allowing the insertion rod 6 to penetrate deep into it. Multiple sets of tension rods 13 are rotatably mounted on the side wall of the ground anchor 101 and connected to the outer wall of the ground anchor 101. Multiple sets of external support rods 12 are slidably mounted on the side wall of the ground anchor 101. When the insertion rod 6 penetrates deep into the ground anchor 101, it pushes the external support rods 12 to expand outward. One end of the external support rod 12 pushes the tension rod 13 to open, increasing the ground support area. When tightening, the tension spring 201 pulls the tension rod 13 back into the retraction groove 21 on the outer wall of the ground anchor 101.

[0026] Please see Figures 1-5 As a supplementary embodiment of the lifting device of an electric double-girder crane with a ground fixing mechanism, an extension fixing mechanism and an external tensioning mechanism: A double-girder frame 14 is installed at the top end of the support frame 1, and an electric hoist 15 is rolled on the double-girder frame 14. A drive ring 16 is installed at the top end of the outer rotating frame 11. A double-layer clamping ring 17 is fixedly installed on the outer wall of the fixed ring 4. The drive ring 16 is limited to rotate within the double-layer clamping ring 17. A positioning hole 18 is opened on the double-layer clamping ring 17. A bidirectional spring rod 19 is installed on the drive ring 16, and the bidirectional spring rod 19 extends into the positioning hole 18 step by step to make the outer rotating frame 11 rotate stably. A directional groove 20 is opened on the fixed ring 4, and the screw pusher and the unlocking ring 9 are linked and slidably guided with the directional groove 20. A retraction groove 21 is opened on the outer wall of the ground anchor rod 101. The tension spring 201 can pull the tension rod 13 back into the retraction groove 21. A pressing plate 22 is installed at one end of the extension rod 6.

[0027] More specifically, the base plate 2 and mounting plate 3 at the bottom of the support frame 1 form a basic support. The ground anchor 101 extends into the ground to provide initial fixation. One end of the extension rod 6 is inserted into the fixing ring 4. The push spring 7 pushes the locking block 8 to connect and fix with the mating block 5, achieving a firm connection. The extension rod 6 extends into the ground anchor 101, pushing the outer support rod 12 to expand outward. The outer support rod 12 further pushes the tension rod 13 to open, forming a larger support area and enhancing overall stability. The double beam frame 14 at the top of the support frame 1 supports the electric hoist 15 to achieve the lifting function. The overall structure ensures stable operation through the triple mechanism of ground anchor fixing, extension fixing, and outer tension support. Rotating the outer rotating frame 11 drives the screw push ring 10 to move through the threaded connection. The screw push ring 10, in conjunction with the unlocking ring 9, pushes the locking block 8 to retract. The tightening spring 201 pulls the tension rod 13 to retract, facilitating the disassembly and movement of the entire device.

[0028] In summary, when the overall equipment is in use or operation: when the foot fixing mechanism is required, the foot fixing mechanism serves as the basic support system of the entire device. The foot plate 2 is installed at the bottom of the support frame 1 to provide initial support area. The mounting plate 3 is fixed on the foot plate 2 to increase structural stability. The fixing ring 4 is installed on the top of the mounting plate 3 to provide a docking interface for the extension rod 6. The ground anchoring rod 101 is installed at the bottom of the mounting plate 3 to provide anchoring effect by penetrating deep into the ground. The mating block 5 on the inner wall of the fixing ring 4 cooperates with the locking block 8 on the extension rod 6 to form a firm connection.

[0029] When the insertion mechanism is needed, it enables quick connection and separation of the device. One end of the insertion rod 6 extends into the fixed ring 4 and forms a connection with the fixed ring 4. The push spring 7 at the outer end of the insertion rod 6 pushes the locking block 8, causing one end of the locking block 8 to push against the inner wall of the fixed ring 4. The locking block 8 and the mating block 5 are relatively fixed to achieve a firm lock. When unlocking is required, the outer rotating frame 11 is rotated, which drives the screw push ring 10 to move through the threaded connection. The screw push ring 10 is linked with the unlocking ring 9, which pushes the locking block 8 back into the insertion rod 6. The locking block 8 disengages from the mating block 5, and the insertion rod 6 can be pulled out from the fixed ring 4.

[0030] When the external tensioning mechanism is required to operate, it provides extended stability for ground support. The ground anchor 101 has a hollow design inside, allowing the insertion rod 6 to penetrate deep into it. Multiple sets of tension rods 13 are rotatably mounted on the side wall of the ground anchor 101 and connected to the outer wall of the ground anchor 101. Multiple sets of external support rods 12 are slidably mounted on the side wall of the ground anchor 101. When the insertion rod 6 penetrates deep into the ground anchor 101, it pushes the external support rods 12 to expand outward. One end of the external support rod 12 pushes the tension rod 13 to open, increasing the ground support area. When tightening, the tension spring 201 pulls the tension rod 13 back into the retraction groove 21 on the outer wall of the ground anchor 101.

[0031] The base plate 2 and mounting plate 3 at the bottom of the support frame 1 form the basic support. The ground anchor 101 extends into the ground to provide initial fixation. One end of the extension rod 6 is inserted into the fixing ring 4. The push spring 7 pushes the locking block 8 to connect and fix with the mating block 5, achieving a firm connection. The extension rod 6 extends into the ground anchor 101, pushing the outer support rod 12 to expand outward. The outer support rod 12 further pushes the tension rod 13 to open, forming a larger support area and enhancing overall stability. The double beam frame 14 at the top of the support frame 1 supports the electric hoist 15 to realize the lifting function. The overall structure ensures stable operation through the triple mechanism of ground anchor fixation, extension fixation, and outer tension support. Rotating the outer rotating frame 11 drives the screw push ring 10 to move through the threaded connection. The screw push ring 10, in conjunction with the unlocking ring 9, pushes the locking block 8 to retract. The tightening spring 201 pulls the tension rod 13 to retract, facilitating the disassembly and movement of the entire device.

[0032] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0033] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise explicitly described, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here. In all the solutions mentioned above, those involving motors can be used with a reducer if necessary. The connection structure and working principle between the motor and the reducer are existing, well-known technologies, and will not be elaborated here.

Claims

1. A lifting device for an electric double-girder crane, comprising a support frame (1), a foot fixing mechanism, an extension fixing mechanism, and an external tensioning mechanism, characterized in that: The foot fixing mechanism includes a foot plate (2) and a mounting plate (3). The foot plate (2) is installed at the bottom end of the support frame (1), and the mounting plate (3) is fixedly installed on the foot plate (2). A fixing ring (4) is installed at the top end of the mounting plate (3), and a ground anchor (101) is installed at the bottom end of the mounting plate (3). A mating block (5) is installed on the inner wall of the fixing ring (4). The insertion fixing mechanism includes an insertion rod (6). One end of the insertion rod (6) can extend into the fixing ring (4), and a thrust spring (7) is installed at the outer end of the insertion rod (6). One end is equipped with a locking block (8), and one end of the locking block (8) is pushed against the inner wall of the fixed ring (4) so ​​that the locking block (8) and the mating block (5) are fixed relative to each other. The inner wall of the fixed ring (4) is slidably equipped with an unlocking ring (9), and the outer wall of the fixed ring (4) is slidably equipped with a screw push ring (10). The screw push ring (10) and the unlocking ring (9) are linked together. The outer wall of the fixed ring (4) is equipped with an outer rotating frame (11) for limiting rotation, and the outer rotating frame (11) is threadedly connected to the screw push ring (10). The unlocking ring (9) can push the locking block (8) to retract into the rod (6).

2. The lifting device of an electric double-girder crane according to claim 1, characterized in that: The external tensioning mechanism includes an external support rod (12) and a tension rod (13). The interior of the ground anchor rod (101) is hollowed out. Multiple sets of tension rods (13) are rotatably installed on the side wall of the ground anchor rod (101). A tensioning spring (201) is installed between one end of the tension rod (13) and the outer wall of the ground anchor rod (101). Multiple sets of external support rods (12) are slidably installed on the side wall of the ground anchor rod (101). One end of the extension rod (6) extends into the ground anchor rod (101), causing the external support rods (12) to extend outward. One end of the external support rods (12) pushes the tension rods (13) to open.

3. The lifting device of an electric double-girder crane according to claim 1, characterized in that: The top end of the support frame (1) is equipped with a double beam frame (14), and an electric hoist (15) is rolled on the double beam frame (14).

4. The lifting device of an electric double-girder crane according to claim 1, characterized in that: The top end of the outer rotating frame (11) is equipped with a driving ring (16), and a double-layer clamping ring (17) is fixedly installed on the outer wall of the fixed ring (4). The driving ring (16) is limited to rotating within the double-layer clamping ring (17).

5. The lifting device of an electric double-girder crane according to claim 4, characterized in that: The double-layer clamping ring (17) has a positioning hole (18), and a bidirectional spring rod (19) is installed on the driving ring (16). The bidirectional spring rod (19) extends into the positioning hole (18) step by step, so that the outer rotating frame (11) rotates stably.

6. The lifting device of an electric double-girder crane according to claim 1, characterized in that: The fixed ring (4) is provided with a directional groove (20), and the screw pusher and the unlocking ring (9) are coordinated with the directional groove (20) for sliding guidance.

7. The lifting device of an electric double-girder crane according to claim 2, characterized in that: The outer wall of the ground anchor (101) is provided with a retraction groove (21), and the tension spring (201) can pull the tension rod (13) to retract into the retraction groove (21).

8. The lifting device of an electric double-girder crane according to claim 1, characterized in that: A pressing plate (22) is installed at one end of the extension rod (6).

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