A single-beam anti-swing lifting device for a crane

Abstract

The utility model relates to the technical field of hoisting trolley, and disclose a single beam hoisting trolley is with anti -sway sling device, including the trolley beam, the outside of trolley beam is provided with the main beam, the outside of main beam is provided with the moving frame, the inside mounting of moving frame has the electric hoist, the outside of electric hoist is provided with the steel wire rope, the utility model discloses through the change connection angle of second rotating lever and first rotating lever, rotates and expands and restricts the lateral displacement of connecting plate, forms mechanical limit, avoids the swing amplitude to be too big, and simultaneously a plurality of damper absorbs swing energy, accelerates swing attenuation, effectively promotes the stability in the process of hook movement, compared with the hard limit can realize the dispersion of the shaking stress, makes the sling in the process of retraction can flow smoothly, has reduced the risk of sling damage.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to an anti-sway lifting device for a single-beam crane. Background Technology

[0002] A single-girder overhead crane is a type of mechanical equipment driven by an electric motor, using a single girder as the main load-bearing component for lifting and transportation. It is also known as a single-girder gantry crane or single-girder trolley. When the electric hoist is lifting or braking, the load will experience horizontal acceleration due to inertia, causing the hook to deviate from the vertical direction. The swaying hoist may collide with surrounding personnel or equipment, especially in confined spaces (such as workshops and warehouses), easily leading to accidents such as crushing and collisions.

[0003] In the use of existing anti-sway lifting devices for single-girder cranes, single-girder cranes usually use hard limiters (such as guide rods) to prevent the lifting device from swaying during use. However, the hard limiters will bear a lot of stress during the anti-swaying process, which will cause the lifting device to be subject to additional resistance during the raising and lowering process, making it unable to operate smoothly, and may lead to wear, deformation or even damage to the lifting device. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-sway lifting device for a single-beam crane to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-sway lifting device for a single-beam crane, comprising a crane beam, a main beam disposed on the outer side of the crane beam, a movable frame disposed on the outer side of the main beam, an electric hoist installed on the inner side of the movable frame, a wire rope disposed on the outer side of the electric hoist, a fixed plate fixedly connected to the outer side of the movable frame, a connecting plate disposed below the fixed plate, and a hook fixedly connected to the bottom of the connecting plate, further comprising:

[0006] A limiting mechanism for reducing the swing stress of the hook is set between the fixed plate and the connecting plate. The limiting mechanism includes a damper and a connecting seat. The damper is fixed to the top of the connecting plate and there are two sets. The top of the two sets of dampers is fixedly connected to the connecting seat.

[0007] A balancing mechanism for improving hook stability is located at the bottom of the connecting plate.

[0008] Preferably, the limiting mechanism further includes a guide component and a scissor component, wherein the guide component is disposed on the inner side of the connecting seat and the scissor component is disposed on the outer side of the guide component.

[0009] Preferably, the guide assembly includes a guide groove formed in the inner wall of the connecting seat, and a sliding shaft is slidably connected to the inner wall of the guide groove.

[0010] Preferably, the scissor lift assembly includes a first rotating rod that rotates at one end of a sliding shaft, a second rotating rod that is rotatably connected to the top of the connecting seat, and a connecting shaft that is rotatably connected to the inner walls of the first and second rotating rods.

[0011] Preferably, one end of the wire rope is fixedly connected to the top of the connecting plate, and the outer side of the wire rope is slidably connected to the inner wall of the fixed plate.

[0012] Preferably, the balancing mechanism further includes a connecting component and a fixing component. The connecting component is disposed at the bottom of the connecting plate, and the fixing component is disposed on the outside of the counterweight and there are two sets of them.

[0013] Preferably, the connecting component includes a limiting groove formed at the bottom of the connecting plate, a connecting block is slidably connected to the inner side of the limiting groove, and the bottom of the connecting block is fixedly connected to the outer side of the counterweight block.

[0014] Preferably, the fixing component includes a mounting base fixed to the outside of the counterweight, and the bottom of the connecting plate is provided with a plurality of threaded holes spaced apart. The inner wall of the mounting base is connected to the inner wall of the threaded holes by bolts.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention changes the connection angle between the second rotating rod and the first rotating rod, rotates and expands, and restricts the lateral displacement of the connecting plate to form a mechanical limit, avoiding excessive swing amplitude. At the same time, multiple sets of dampers absorb the swing energy and accelerate the swing decay, effectively improving the stability of the hook during movement. Compared with hard limit, it can disperse the swaying stress, allowing the lifting device to operate smoothly during the lifting and lowering process, and reducing the risk of lifting device damage. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of an anti-sway lifting device for a single-beam crane provided by this utility model;

[0018] Figure 2 A schematic diagram of the side structure of the crane beam provided by this utility model;

[0019] Figure 3 A schematic diagram of the bottom structure of the main beam provided by this utility model;

[0020] Figure 4 This is a schematic diagram of the scissor lift assembly provided by this utility model;

[0021] Figure 5 A schematic diagram of the connection component structure provided by this utility model.

[0022] In the diagram: 1. Crane beam; 2. Main beam; 3. Moving frame; 4. Electric hoist; 5. Wire rope; 6. Fixing plate; 7. Connecting plate; 8. Hook; 9. Limiting mechanism; 91. Damper; 92. Connecting seat; 93. Guide assembly; 931. Guide groove; 932. Sliding shaft; 94. Scissor lift assembly; 941. First rotating rod; 942. Second rotating rod; 943. Connecting shaft; 10. Balancing mechanism; 101. Connecting assembly; 1011. Limiting groove; 1012. Connecting block; 102. Counterweight block; 103. Fixing assembly; 1031. Mounting seat; 1032. Threaded hole. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5 As shown, an anti-sway lifting device for a single-girder crane includes a crane beam 1, which is the core support structure of the entire crane, typically a horizontally arranged I-beam or box girder, used to bear the entire weight of the lifting device and load. A main beam 2 is provided on the outer side of the crane beam 1, connected to the crane beam 1 via a drive system, used to drive the lifting device to move along the outer side of the crane beam 1. This is prior art and will not be described in detail here. A movable frame 3 is provided on the outer side of the main beam 2. The movable frame 3 is a movable component installed on the main beam 2, used to support the electric hoist 4 and achieve horizontal positioning. The adjustment of the hoisting position is a common existing technology and will not be elaborated on here; an electric hoist 4 is installed on the inner side of the mobile frame 3. The electric hoist 4 is the core lifting mechanism of the lifting device, used to achieve vertical lifting and lowering of the load; a wire rope 5 is installed on the outer side of the electric hoist 4. The wire rope 5 is a flexible transmission component connecting the electric hoist 4 and the lifting device (such as the hook 8), used to transmit lifting force; a fixed plate 6 is fixedly connected to the outer side of the mobile frame 3, a connecting plate 7 is installed below the fixed plate 6, and a hook 8 is fixedly connected to the bottom of the connecting plate 7 for hoisting items; it also includes:

[0025] A limiting mechanism 9 for reducing the swaying stress of the hook 8 is disposed between the fixed plate 6 and the connecting plate 7. The limiting mechanism 9 includes a damper 91 and a connecting seat 92. When the hook 8 sways due to inertia or external force, the connecting plate 7 will undergo a slight lateral (horizontal) or longitudinal (vertical) displacement relative to the fixed plate 6. The piston rod of the damper 91 will shift accordingly, generating a damping force through the flow of internal oil or other media, converting the swaying energy into heat energy for dissipation, thereby suppressing the swaying of the hook 8. The damper 91 is fixed to the top of the connecting plate 7 and two sets are provided. The top of each set of dampers 91 is fixedly connected to the connecting seat 92. The limiting mechanism 9 also includes The guide assembly 93 and the scissor lift assembly 94 are provided. The guide assembly 93 is located inside the connecting seat 92, and the scissor lift assembly 94 is located outside the guide assembly 93. The guide assembly 93 includes a guide groove 931 formed in the inner wall of the connecting seat 92. A sliding shaft 932 is slidably connected to the inner wall of the guide groove 931. The guide groove 931 restricts the movement direction of the sliding shaft 932, keeping the sliding shaft 932 moving in parallel. The scissor lift assembly 94 includes a first rotating rod 941 that rotates at one end of the sliding shaft 932. A second rotating rod 942 is rotatably connected to the top of the connecting seat 92. A connecting shaft 943 is rotatably connected to the inner walls of the first rotating rod 941 and the second rotating rod 942. The first rotating rod 941 and the second rotating rod 942 are connected by the connecting shaft 943 to improve their stability during movement. The telescopic movement of the scissor lift assembly 94 absorbs some kinetic energy, reducing the swing amplitude of the hook 8. One end of the wire rope 5 is fixedly connected to the top of the connecting plate 7, and the outer side of the wire rope 5 is slidably connected to the inner wall of the fixed plate 6.

[0026] A balancing mechanism 10 for improving the stability of the hook 8 is disposed at the bottom of the connecting plate 7. The balancing mechanism 10 also includes a connecting component 101 and a fixing component 103. The connecting component 101 is disposed at the bottom of the connecting plate 7, and the fixing component 103 is disposed on the outside of the counterweight 102, and there are two sets of them. The connecting component 101 includes a limiting groove 1011 opened at the bottom of the connecting plate 7. A connecting block 1012 is slidably connected to the inner side of the limiting groove 1011. The bottom of the connecting block 1012 is fixedly connected to the outer side of the counterweight 102. The counterweight 102 can adjust its position by sliding the connecting block 1012 in the limiting groove 1011. The limiting groove 1011 will affect the connecting block 101. The movement path of 2 is restricted, and the counterweight 102 is ensured to move parallel along a predetermined trajectory. The fixing component 103 includes a mounting base 1031 fixed to the outside of the counterweight 102. The bottom of the connecting plate 7 is provided with a plurality of threaded holes 1032 spaced apart. The inner wall of the mounting base 1031 and the inner wall of the threaded holes 1032 are connected by bolts. The inner walls of the mounting base 1031 and the threaded holes 1032 are both threadedly connected to the bolts. By screwing in the bolts, the position of the counterweight 102 can be fixed. Through the multiple threaded holes 1032 arranged in parallel, the position of the counterweight 102 at the bottom of the connecting plate 7 can be flexibly adjusted, and the number of counterweights 102 can be increased or decreased according to the usage.

[0027] Working principle: When lifting items, the electric hoist 4 is started first. The drum rotates, releasing the wire rope 5. The connecting plate 7 and hook 8 move under their own weight. As the height of the connecting plate 7 changes, one end of the first rotating rod 941 slides along the guide groove 931 via the sliding shaft 932. At this time, the second rotating rod 942 changes its connection angle with the first rotating rod 941, rotating and unfolding to limit the lateral displacement of the connecting plate 7, forming a mechanical limit to prevent excessive swing amplitude. Simultaneously, multiple dampers 91 absorb the swing energy, accelerating the attenuation of the swing. This effectively improves the stability of the hook 8 during movement. At the same time, when lifting different items, the position and number of counterweights 102 can be adjusted according to the load weight. Specifically, when adjusting the position of the counterweights 102, the counterweights 102 can be pushed to make the connecting block 1012 slide along the inner side of the limiting groove 1011. Then, by screwing the bolts into the inner wall of the mounting base 1031 and the threaded hole 1032, the counterweights 102 can be fixed. By changing the distribution position of the counterweights 102 at the bottom of the connecting plate 7, the eccentric torque of the load can be offset, and the swaying tendency of the hook 8 can be reduced.

[0028] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single-beam crane anti-sway lifting device, comprising a crane beam (1), a main beam (2) provided on the outer side of the crane beam (1), a movable frame (3) provided on the outer side of the main beam (2), an electric hoist (4) installed on the inner side of the movable frame (3), a wire rope (5) provided on the outer side of the electric hoist (4), a fixed plate (6) fixedly connected to the outer side of the movable frame (3), a connecting plate (7) provided below the fixed plate (6), and a hook (8) fixedly connected to the bottom of the connecting plate (7), characterized in that, Also includes: A limiting mechanism (9) for reducing the swing stress of the hook (8) is provided between the fixed plate (6) and the connecting plate (7). The limiting mechanism (9) includes a damper (91) and a connecting seat (92). The damper (91) is fixed on the top of the connecting plate (7) and there are two sets. The top of the two sets of dampers (91) is fixedly connected to the connecting seat (92). A balancing mechanism (10) for improving the stability of the hook (8) is provided at the bottom of the connecting plate (7).

2. The anti-sway lifting device for a single-girder crane according to claim 1, characterized in that: The limiting mechanism (9) further includes a guide component (93) and a scissor assembly (94). The guide component (93) is disposed inside the connecting seat (92), and the scissor assembly (94) is disposed outside the guide component (93).

3. The anti-sway lifting device for a single-girder crane according to claim 2, characterized in that: The guide assembly (93) includes a guide groove (931) formed in the inner wall of the connecting seat (92), and a sliding shaft (932) is slidably connected to the inner wall of the guide groove (931).

4. The anti-sway lifting device for a single-girder crane according to claim 2, characterized in that: The scissor lift assembly (94) includes a first rotating rod (941) that rotates at one end of a sliding shaft (932), a second rotating rod (942) that is rotatably connected to the top of the connecting seat (92), and a connecting shaft (943) that is rotatably connected to the inner walls of the first rotating rod (941) and the second rotating rod (942).

5. The anti-sway lifting device for a single-girder crane according to claim 1, characterized in that: One end of the wire rope (5) is fixedly connected to the top of the connecting plate (7), and the outer side of the wire rope (5) is slidably connected to the inner wall of the fixing plate (6).

6. The anti-sway lifting device for a single-girder crane according to claim 1, characterized in that: The balancing mechanism (10) further includes a connecting component (101) and a fixing component (103). The connecting component (101) is located at the bottom of the connecting plate (7), and the fixing component (103) is located on the outside of the counterweight (102) and there are two sets of them.

7. The anti-sway lifting device for a single-girder crane according to claim 6, characterized in that: The connecting component (101) includes a limiting groove (1011) opened at the bottom of the connecting plate (7), and a connecting block (1012) is slidably connected to the inner side of the limiting groove (1011). The bottom of the connecting block (1012) is fixedly connected to the outer side of the counterweight block (102).

8. The anti-sway lifting device for a single-girder crane according to claim 6, characterized in that: The fixing component (103) includes a mounting base (1031) fixed to the outside of the counterweight (102), and the bottom of the connecting plate (7) is provided with a plurality of threaded holes (1032) spaced apart. The inner wall of the mounting base (1031) is connected to the inner wall of the threaded holes (1032) by bolts.

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