Anti-falling mechanism for a balanced crane

Abstract

The utility model discloses a kind of anti-falling mechanisms for balance crane in the technical field of balance crane, including support plate, the vertical fixed mounting of support plate upper is provided with stand, the top of stand is installed with balance crane boom main body, the end of balance crane boom main body is fixedly installed with connecting block, connecting block's both sides are rotatably installed with connecting rod, the bottom end inboard of connecting rod is rotatably installed with fixed plate, the inboard of fixed plate is provided with installation groove, the inboard below of installation groove is equipped with hook, the rotation connection between hook and installation groove is carried out through fixed shaft, when hoisting and carrying material, when balance crane boom main body drives hook to rise upward, the gravity of material itself can make connecting rod, fixed plate and hook between between vertical state, so that the end of hook is clamped in the inside of slot, realize the inboard of hook is closed state, to prevent the phenomenon of rope and hook between sliding.

Description

Technical Field

[0001] This utility model belongs to the field of balance crane technology, specifically relating to an anti-fall mechanism for balance cranes. Background Technology

[0002] A balancer is an industrial lifting device that uses the principle of force balance to move materials in three-dimensional space. It mainly includes three categories: mechanical, pneumatic, and hydraulic. This equipment uses a screw lifting mechanism and the principle of parallelogram scaling to achieve precise positioning. It is equipped with safety devices such as overload protection and air-locking mechanisms, and its operating force is typically controlled within 3 kg. As of 2025, the product models cover two major series: PDJ high-profile and PDJ-A low-profile, with a lifting capacity range of 0.05-0.5 tons. They are widely used in industrial scenarios such as machine tool loading and unloading, assembly line transfers, and warehousing logistics.

[0003] Existing balance cranes typically tie goods to ropes before hoisting them, then attach the ropes to the hook. However, there is no way to limit the ropes once they are attached to the hook, causing them to slip during movement and resulting in the goods falling off. This reduces the practicality of the balance crane and makes it inconvenient for users. Therefore, we propose an anti-fall mechanism for balance cranes. Utility Model Content

[0004] The purpose of this invention is to provide an anti-fall mechanism for a balance crane to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fall prevention mechanism for a balance hoist, comprising a support plate, a column vertically fixedly installed above the support plate, a balance hoist body installed at the top of the column, a connecting block fixedly installed at the end of the balance hoist body, connecting rods rotatably installed on both sides of the connecting block, a fixing plate rotatably installed on the inner side of the bottom end of the connecting rod, an installation groove provided on the inner side of the fixing plate, a hook provided below the inner side of the installation groove, the hook and the installation groove being rotatably connected by a fixing shaft, a fixing rod fixedly installed on the outer side of the hook, a first connecting shaft fixedly installed on one side of the inner side of the installation groove, a second connecting shaft fixedly installed between the fixing rods, and the first connecting shaft and the second connecting shaft being connected by a spring.

[0006] Preferably, the fixing plate has symmetrical through-grooves on one side surface.

[0007] Preferably, a built-in handle is provided through one side of the surface of the fixing plate.

[0008] Preferably, a base is rotatably mounted on the bottom of the support plate, and movable wheels are symmetrically mounted on both sides of the base.

[0009] Preferably, the outer side of the support plate is connected to multiple sets of support arms in a ring, and a lead screw is threaded through the end of each support arm, and a base is rotatably mounted at the bottom end of the lead screw.

[0010] Preferably, a throttle is fixedly installed at the top end of the lead screw.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] When hoisting materials, as the balance boom lifts the hook upwards, the weight of the material itself will cause the connecting rod, fixing plate, and hook to be in a vertical position, so that the end of the hook is locked inside the slot, achieving a closed state on the inside of the hook, thereby preventing the rope from slipping off the hook. Attached Figure Description

[0013] Figure 1 This is a front structural diagram of the present invention;

[0014] Figure 2 This is a side view of the present invention.

[0015] Figure 3 This is a schematic diagram of the fixing plate structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the mounting slot of this utility model.

[0017] In the diagram: 1. Support plate; 2. Column; 3. Balance rod body; 4. Connecting block; 5. Connecting rod; 6. Fixing plate; 7. Mounting groove; 8. Hook; 9. Fixing shaft; 10. First connecting shaft; 11. Spring; 12. Fixing rod; 13. Second connecting shaft; 14. Slot; 15. Base; 16. Caster wheel; 17. Support arm; 18. Lead screw; 19. Thruster; 20. Chassis; 21. Built-in handle. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-4This utility model provides a technical solution: a fall prevention mechanism for a balance hoist, including a support plate 1, a column 2 vertically fixedly installed above the support plate 1, a balance hoist body 3 installed at the top of the column 2, a connecting block 4 fixedly installed at the end of the balance hoist body 3, connecting rods 5 rotatably installed on both sides of the connecting block 4, a fixing plate 6 rotatably installed on the inner side of the bottom end of the connecting rod 5, an installation groove 7 is provided on the inner side of the fixing plate 6, a hook 8 is provided at the lower inner side of the installation groove 7, the hook 8 is rotatably connected to the installation groove 7 through a fixing shaft 9, a fixing rod 12 is fixedly installed on the outer side of the hook 8, a first connecting shaft 10 is fixedly installed on one side of the inner side of the installation groove 7, a second connecting shaft 13 is fixedly installed between the fixing rods 12, and the first connecting shaft 10 and the second connecting shaft 13 are connected by a spring 11.

[0020] Specifically, a slot 14 is symmetrically provided through one side surface of the fixing plate 6.

[0021] Specifically, a built-in handle 21 is provided through one side of the surface of the fixing plate 6.

[0022] Specifically, a base 15 is rotatably mounted on the bottom of the support plate 1, and movable wheels 16 are symmetrically mounted on both sides of the base 15.

[0023] Specifically, the outer side of the support plate 1 is connected to multiple sets of support arms 17 in a ring. The end of the support arm 17 is threaded and rotatably fitted with a lead screw 18, and the bottom end of the lead screw 18 is rotatably fitted with a base plate 20.

[0024] Specifically, a throttle 19 is fixedly installed at the top of the lead screw 18.

[0025] In this embodiment, the spring 11, in its original state, causes the hook 8 and the bottom of the fixing plate 6 to be open. When hoisting materials, the rope is hung on the inside of the hook 8. When the balance rod body 3 drives the connecting rod 5 and the fixing plate 6 to rise, the weight of the material itself will cause the connecting rod 5, the fixing plate 6 and the hook 8 to be in a vertical state, so that the end of the hook 8 is locked in the inside of the slot 14, thereby closing the inside of the hook 8 and preventing the rope from slipping off the hook 8. At this time, the hook 8 simultaneously stretches the spring 11. The base 15 and the moving wheel 16 increase the overall flexibility of the device and make it easy to move as needed. The support arm 17 and the rotating screw 18 can drive the chassis 20 to descend, so as to support and fix the device, thereby improving the stability of the device.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] 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 fall prevention mechanism for a balance crane, comprising a support plate (1), characterized in that: A column (2) is vertically fixed above the support plate (1). A balance rod body (3) is installed at the top of the column (2). A connecting block (4) is fixedly installed at the end of the balance rod body (3). Connecting rods (5) are rotatably installed on both sides of the connecting block (4). A fixing plate (6) is rotatably installed on the inner side of the bottom end of the connecting rod (5). An installation groove (7) is opened on the inner side of the fixing plate (6). A hook (8) is provided on the lower inner side of the installation groove (7). The hook (8) and the installation groove (7) are rotatably connected by a fixing shaft (9). A fixing rod (12) is fixedly installed on the outer side of the hook (8). A first connecting shaft (10) is fixedly installed on one side of the inner side of the installation groove (7). A second connecting shaft (13) is fixedly installed between the fixing rods (12). The first connecting shaft (10) and the second connecting shaft (13) are connected by a spring (11).

2. The anti-fall mechanism for a balance crane according to claim 1, characterized in that: The fixing plate (6) has symmetrical slots (14) through one side surface.

3. The anti-fall mechanism for a balance crane according to claim 1, characterized in that: A built-in handle (21) is provided through one side of the surface of the fixing plate (6).

4. The anti-fall mechanism for a balance crane according to claim 1, characterized in that: A base (15) is rotatably mounted on the bottom of the support plate (1), and movable wheels (16) are symmetrically mounted on both sides of the base (15).

5. The anti-fall mechanism for a balance crane according to claim 1, characterized in that: The outer side of the support plate (1) is connected to a plurality of support arms (17), and a screw rod (18) is threaded through and installed at the end of the support arm (17), and a base plate (20) is rotatably installed at the bottom end of the screw rod (18).

6. The anti-fall mechanism for a balance crane according to claim 5, characterized in that: A throttle (19) is fixedly installed at the top of the lead screw (18).

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