Folding lifting and handling clamp

Abstract

This utility model relates to the field of lifting and handling technology, and in particular to a folding lifting and handling clamp, including a main mounting frame and a lower base. The main mounting frame has pulleys at each of its four corners on its upper surface, a connecting frame on its upper surface, and an electric hoist on its bottom surface. A mounting groove is formed on the upper surface of the main mounting frame below the electric hoist, and an upper base is placed within the mounting groove. A through groove is formed on the upper surface of the upper base. The folding lifting and handling clamp of this utility model forms a unique "double synchronous gear mechanism" by setting mutually meshing gear one and gear two at the upper and lower ends respectively. This design forcibly ensures that the two sets of parallel four-bar linkages connecting the main mounting frame and the lower base maintain absolutely synchronous and symmetrical movement at all times. This fundamentally eliminates tilting, jamming, or shaking caused by asynchrony during lifting, ensuring extreme smoothness during the lifting process.

Description

Technical Field

[0001] This utility model relates to the field of lifting and handling technology, and in particular to a folding lifting and handling clamp. Background Technology

[0002] In industrial production, logistics warehousing, and large equipment assembly, vertical lifting and horizontal handling of materials are extremely common operations. Currently, common lifting and handling equipment on the market mainly includes hydraulic lifting platforms, screw jacks, and simple lifting devices based on wire ropes or chains.

[0003] Most existing lifting devices, driven by wire ropes or hydraulic cylinders, lack effective forced synchronization mechanisms. When faced with asymmetrical loads or slight wear, asynchronous lifting on both sides is prone to occur, leading to platform tilting and jamming. This not only affects handling accuracy but also poses a safety risk of goods slipping or even tipping over. Furthermore, traditional rigid lifting mechanisms, in order to achieve a large stroke, still have a relatively large overall height when retracted, or require significant lateral space during operation. This limits their application in locations with limited height or compact space (such as low-ceiling workshops or dense shelving). Therefore, we propose a folding lifting and handling fixture. Utility Model Content

[0004] The main purpose of this utility model is to provide a folding lifting and handling clamp, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A folding lifting and handling fixture includes a main mounting frame and a lower base. The main mounting frame has pulleys at all four corners of its upper surface and a connecting frame on its upper surface. An electric hoist is mounted on the bottom surface of the connecting frame. An installation groove is formed on the upper surface of the main mounting frame below the electric hoist, and an upper base is positioned within the installation groove. A through groove is formed on the upper surface of the upper base, and upright plates are symmetrically arranged on both sides of the through groove on the bottom surface of the upper base. A rotating rod is symmetrically rotatably connected between the two sets of upright plates. Gears are provided at both ends of the rotating rod's circumference. Two connecting rods are provided on the sides of the two sets of rotating rods. A connecting rod is hinged to the free end of the connecting rod, and a rotating rod is inserted through the free end of the connecting rod. Gears are provided on both ends of the rotating rod's circumference, and the free end of the connecting rod is located within the lower base.

[0006] Preferably, a connector is provided at the center of the lower base, a connecting rod is provided on the bottom surface of the lower base, and a clamping assembly is provided at the bottom end of the connecting rod.

[0007] By adopting the above technical solution, the electric hoist is integrated into the main mounting frame as the power source, resulting in a compact structure, powerful performance, and precise control. The mounting slot is provided to allow space for the electric hoist's chain and ensure precise alignment with the lifting mechanism below.

[0008] Preferably, the bottom surface of the main mounting frame is symmetrically provided with support rods, the bottom end of the support rod is provided with a positioning block, and the bottom surface of the positioning block is provided with a positioning groove.

[0009] Preferably, the gears at one end of the two sets of connecting rods mesh with each other, and the shape and size of the through groove are adapted to the hinge of the electric hoist. The hinge of the electric hoist passes through the through groove and extends into the lower base.

[0010] By adopting the above technical solution, two sets of connecting rods mesh with each other through gears at their ends. This means that when one rotating rod rotates, the other will rotate in a completely opposite but synchronous manner. This ensures that the movement of the connecting rods on both sides is completely consistent during the lifting process, avoiding tilting, jamming, or uneven force on the lifting base, and ensuring the smoothness and safety of the lifting process.

[0011] Preferably, the second connecting rod is fixedly connected to the second rotating rod, the gears at the bottom ends of the two sets of the second connecting rods mesh with each other, and the two ends of the second rotating rod rotate in cooperation with the inner wall of the lower base.

[0012] By adopting the above technical solution, synchronization is achieved not only at the top gear one but also at the bottom gear two through meshing. This "double insurance" design maximizes the rigidity and stability of the entire parallelogram structure during lifting. Even under uneven lateral forces, the two sets of synchronizing gears work together to maintain the horizontality and posture of the lower base, greatly enhancing the equipment's resistance to eccentric loads and extending its service life.

[0013] Preferably, the hinge and connector of the electric hoist are fixedly connected, and the shape and size of the positioning groove are adapted to the crossbars on both sides of the clamp assembly.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model constructs a unique "double synchronous gear mechanism" by setting two meshing gears at the upper and lower ends respectively. This design ensures that the two sets of parallel four-bar linkages connecting the main mounting frame and the lower base maintain absolutely synchronized and symmetrical movement at all times. This fundamentally eliminates tilting, jamming, or swaying caused by asynchrony during lifting, ensuring extreme smoothness during the lifting process. Simultaneously, the parallel four-bar structure itself has excellent force distribution characteristics, which, combined with this synchronization mechanism, gives the equipment excellent resistance to off-center loads, enabling it to withstand greater loads and have a longer service life.

[0015] 2. This utility model adopts a design combining an electric hoist with a foldable parallel four-bar linkage mechanism. In the retracted state, connecting rod one and connecting rod two can be folded to a near-horizontal position, minimizing the overall height of the equipment and facilitating storage or passage in low-ceilinged spaces. In the working state, the extension of the connecting rods enables a vertical lifting stroke far exceeding the length of the connecting rods themselves. This "small storage, large stroke" feature greatly improves the space adaptability and utilization rate of the equipment, solving the problem of large space occupation by traditional rigid lifting mechanisms.

[0016] 3. The support rod and positioning block with positioning groove at the bottom of the main mounting frame cooperate with the crossbar of the clamp assembly to form a reliable storage and positioning mechanism. When the clamp is raised to its highest point, the crossbar engages in the positioning groove, effectively preventing the clamp from swinging arbitrarily when the equipment is moving or stationary, avoiding the risk of collision with surrounding equipment or personnel, and significantly improving operational safety. Simultaneously, the pulleys on the top of the main mounting frame allow the entire device to move easily along the track, achieving efficient and flexible material handling in three-dimensional space. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the folding lifting and handling clamp of this utility model; Figure 2 This is a schematic diagram of the clamping assembly of the folding lifting and transporting clamp of this utility model; Figure 3 This is a left view of the folding lifting and handling clamp of this utility model; Figure 4 This is a top view of the folding lifting and handling clamp of this utility model.

[0018] In the diagram: 1. Main mounting frame; 101. Connecting frame; 10. Pulley; 102. Electric hoist; 103. Mounting slot; 11. Support rod; 110. Positioning block; 111. Positioning slot; 2. Upper base; 20. Through slot; 21. Vertical plate; 210. Rotating rod one; 211. Gear one; 212. Connecting rod one; 22. Connecting rod two; 221. Rotating rod two; 220. Gear two; 23. Lower base; 230. Connecting piece; 3. Clamp assembly. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1-4 This utility model provides a technical solution: The folding lifting and handling fixture includes a main mounting frame 1 and a lower base 23. The main mounting frame 1 has pulleys 10 at each of its four corners on its upper surface. A connecting frame 101 is mounted on the upper surface of the main mounting frame 1, and an electric hoist 102 is mounted on the bottom surface of the connecting frame 101. A mounting groove 103 is formed on the upper surface of the main mounting frame 1 below the electric hoist 102, and an upper base 2 is installed within the mounting groove 103. A through groove 20 is formed on the upper surface of the upper base 2, and upright plates 21 are symmetrically arranged on both sides of the through groove 20 on the bottom surface of the upper base 2. A rotating mechanism is symmetrically and rotatably connected between the two sets of upright plates 21. The first rod 210 has gears 211 at both ends of its circumference. The two sets of rotating rods 210 have two sets of connecting rods 212 at their circumference. The free end of the connecting rod 212 is hinged to the second connecting rod 22. The free end of the second connecting rod 22 has a rotating rod 221 inserted through it. The two ends of the rotating rod 221 have gears 220 at their circumference. The free end of the second connecting rod 22 is located inside the lower base 23. The center of the lower base 23 has a connector 230. The bottom surface of the lower base 23 has a connecting rod. The bottom end of the connecting rod has a clamp assembly 3.

[0023] In this embodiment, support rods 11 are symmetrically arranged on the bottom surface of the main mounting frame 1. A positioning block 110 is provided at the bottom end of the support rod 11. A positioning groove 111 is opened on the bottom surface of the positioning block 110. The gears 211 at one end of the two sets of connecting rods 212 mesh with each other. The shape and size of the through groove 20 are adapted to the hinge of the electric hoist 102. The hinge of the electric hoist 102 passes through the through groove 20 and extends into the lower base 23. The connecting rod 22 is fixedly connected to the rotating rod 221. The gears 220 at the bottom end of the two sets of connecting rods 22 mesh with each other. The two ends of the rotating rod 221 rotate with the inner wall of the lower base 23. The hinge of the electric hoist 102 is fixedly connected to the connecting piece 230. The shape and size of the positioning groove 111 are adapted to the crossbars on both sides of the clamp assembly 3.

[0024] Through the above scheme: the operator controls the electric hoist 102 to work, the chain of the electric hoist 102 is released or retracted, the chain passes downward through the through groove 20 on the upper base 2, and its end is fixedly connected to the connecting piece 230 at the center of the lower base 23. When the chain of the electric hoist 102 is released, the lower base 23 and the clamp assembly 3 tend to descend under the action of gravity. At this time, the loosening of the chain allows the lower base 23 connected to the connecting piece 230 to move downward. When the chain of the electric hoist 102 is retracted, the chain pulls the connecting piece 230 upward, thereby giving the lower base 23 an upward pulling force. The entire lifting mechanism consists of the upper base 2, the lower base 23 and the connecting piece 230. The two sets of symmetrical connecting rods 212 and 22 form a foldable parallel four-bar linkage. Under the upward pulling force of the chain, the lower base 23 is pulled upward, forcing the hinge points of the two sets of connecting rods 212 and 22 to fold inward. The entire linkage mechanism folds up like scissors, causing the lower base 23 to rise. Conversely, when the chain is released, the lower base 23 moves downward under the action of gravity, pushing the hinge points of connecting rods 212 and 22 to expand outward. The entire linkage mechanism unfolds, causing the lower base 23 to descend. This folding / unfolding design of the connecting rods allows for a larger vertical lifting stroke with a shorter connecting rod length, making the structure highly efficient.

[0025] It should be noted that when the operator controls the electric hoist 102, the chain of the electric hoist 102 is released or retracted. The chain passes downward through the through slot 20 on the upper base 2, and its end is fixedly connected to the connecting piece 230 at the center of the lower base 23. When the chain of the electric hoist 102 is released, the lower base 23 and the clamp assembly 3 tend to descend under the action of gravity. At this time, the loosening of the chain allows the lower base 23 connected to the connecting piece 230 to move downward. When the chain of the electric hoist 102 is retracted, the chain pulls the connecting piece 230 upward, thereby giving the lower base 23 an upward pulling force. The entire lifting mechanism consists of the upper base 2, the lower base 23, and two sets of symmetrical connecting rods 1 212 and 22 connected between them, forming a foldable parallel four-bar structure. Under the upward pulling force of the chain, the lower base 23 is pulled upward, forcing the two sets of connecting rods 1 212 and 22 to move downward. When the hinge point of link 22 retracts inward, the entire linkage mechanism folds like scissors, causing the lower base 23 to rise. Conversely, when the chain loosens, the lower base 23 descends under gravity, pushing the hinge point of link 1 212 and link 2 22 outward, unfolding the entire linkage mechanism and causing the lower base 23 to descend. This folding / unfolding design of the linkage allows for a large vertical lifting stroke with a shorter link length, making the structure highly efficient. At the ends of the two rotating rods 1 210, meshing gears 1 211 are installed. This means that when one link 1 212 begins to rotate, it will force the other link 1 212 to rotate at the same speed but in the opposite direction through this pair of meshing gears 1 211. This ensures that the starting movements on both sides of the lifting mechanism are completely synchronized. Similarly, at the bottom, gears 220 on the two rotating rods 2 221 are also meshed. This constitutes a second layer of synchronization protection. Even with slight off-center loading or wear, this pair of gears can force the lower base 23 to maintain a horizontal posture.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A folding lifting and handling fixture, comprising a main mounting frame (1) and a lower base (23), characterized in that: The main mounting frame (1) has pulleys (10) at each of the four corners of its upper surface. A connecting frame (101) is provided on the upper surface of the main mounting frame (1). An electric hoist (102) is provided on the bottom surface of the connecting frame (101). A mounting groove (103) is provided on the upper surface of the main mounting frame (1) below the electric hoist (102). An upper base (2) is provided in the mounting groove (103). A through groove (20) is provided on the upper surface of the upper base (2). Vertical plates (21) are symmetrically arranged on both sides of the through groove (20) on the bottom surface of the upper base (2). Two sets of... The upright plates (21) are symmetrically rotatably connected by a rotating rod (210). Both ends of the rotating rod (210) are provided with gears (211). The two sets of rotating rods (210) are provided with two sets of connecting rods (212). The free end of the connecting rod (212) is hinged to a connecting rod (22). The free end of the connecting rod (22) is inserted with a rotating rod (221). Both ends of the rotating rod (221) are provided with gears (220). The free end of the connecting rod (22) is located inside the lower base (23).

2. The folding lifting and handling clamp according to claim 1, characterized in that: A connector (230) is provided at the center of the lower base (23), a connecting rod is provided on the bottom surface of the lower base (23), and a clamp assembly (3) is provided at the bottom end of the connecting rod.

3. The folding lifting and handling clamp according to claim 1, characterized in that: The main mounting bracket (1) has symmetrical support rods (11) on its bottom surface. The support rods (11) have a positioning block (110) at their bottom ends. The positioning block (110) has a positioning groove (111) on its bottom surface.

4. The folding lifting and handling clamp according to claim 1, characterized in that: The gears (211) at one end of the two sets of connecting rods (212) mesh with each other, and the shape and size of the through groove (20) are adapted to the hinge of the electric hoist (102). The hinge of the electric hoist (102) passes through the through groove (20) and extends into the lower base (23).

5. The folding lifting and transporting clamp according to claim 2, characterized in that: The second connecting rod (22) is fixedly connected to the second rotating rod (221), and the gears (220) at the bottom of the two sets of the second connecting rods (22) mesh with each other. The two ends of the second rotating rod (221) rotate in cooperation with the inner wall of the lower base (23).

6. The folding lifting and handling clamp according to claim 3, characterized in that: The hinge of the electric hoist (102) is fixedly connected to the connector (230), and the shape and size of the positioning groove (111) are adapted to the crossbars on both sides of the clamp assembly (3).

Images