A lifting device for a fork lift truck

Abstract

The utility model discloses a hoist device for forklift lifting belongs to forklift hoist field, this hoist device includes base, the end face of base is equipped with adjusting structure, and the rotatory installation of adjusting structure has the hanger arm, through setting up the lifting structure, the function of up and down movement is realized to the rope hook or the movable pulley hook, and the rope hook or movable pulley hook can quickly fall to the article and manually hook the article, and the article is lifted and carries, avoids the hook of the existing auxiliary hoist device for forklift and is installed on the cross arm lug, causes the hook to be unable to move up and down, and the hook cannot quickly fall and hook the article when carrying the article, and the existing hoist device submergence depth is not enough to the problem of the article in the place where the fall is relatively high, thereby convenient for the carrying operation of article, and through the setting of hydraulic capstan, hoist device realizes the 0-8m of partition wall and lifts the goods, makes the hoist travel of forklift crane greatly improves.

Description

Technical Field

[0001] This utility model relates to the field of forklift lifting technology, specifically a lifting device for forklift lifting. Background Technology

[0002] To facilitate the handling and loading / unloading of heavy items, many factories are equipped with small forklifts. However, due to the limitation of forklift boom length, they are generally used for loading and unloading items with relatively regular shapes. For larger but lighter items with irregular shapes, forklifts need to be equipped with lifting devices to handle and load / unload irregular items. Additionally, when forklifts are inconvenient for loading and unloading goods from high-sided trucks, or when forklifts lack sufficient diving depth for complex working conditions such as foundation pits, forklift cranes can be used for lifting and lowering goods for loading and unloading.

[0003] Chinese utility model patent CN204823973U discloses an auxiliary lifting device for forklifts. The device includes a base plate with two insertable forklift sleeves on its base. A main column is mounted on top of the base plate, with a crossarm at its upper end. The end of the crossarm has a hook for lifting items. An auxiliary column is also mounted on top of the base plate, with its upper end supported on the crossarm. Several diagonal braces are also mounted on top of the base plate, with their upper ends supported on the main column. Lifting lugs are located at the ends of the crossarms, and the hooks for lifting items are mounted on these lugs. This invention integrates the forklift and auxiliary lifting device into a single unit by inserting the forklift arm into a sleeve on the bottom of the base plate. The hook in the auxiliary lifting device facilitates the handling and loading / unloading of large but lightweight and irregularly shaped items, making it highly practical. Therefore, this invention features a simple structure and reasonable design. However, the existing auxiliary lifting device for forklifts has its hook mounted on the boom lug, which prevents the hook from moving up and down. This results in the hook not being able to quickly descend and hook the items during handling, and the existing lifting device does not have sufficient depth to descend when the items are at a significant height, thus causing inconvenience in handling the items.

[0004] Therefore, this utility model provides a lifting device for forklift lifting to solve the above problems. Utility Model Content

[0005] This utility model provides a lifting device for forklift lifting, aiming to solve the problems mentioned in the background art, such as the hook of the existing auxiliary lifting device for forklifts being installed on the horizontal boom lug, which makes the hook unable to move up and down, the hook not being able to quickly drop down and hook the item when moving items, and the existing lifting device not having enough diving depth when the item is in a place with a large drop, thus causing inconvenience to the handling of items.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lifting device for forklift lifting, comprising a base, an adjustment structure mounted on the end face of the base, a boom rotatably mounted on the adjustment structure, and a lifting structure mounted on the boom;

[0007] The lifting structure includes a hydraulic winch and a U-shaped frame mounted on the boom. A second steel wire rope is wound around the hydraulic winch. A fixed pulley is installed inside the U-shaped frame, and a fixed hanging ring is located on the lower side of the U-shaped frame. A rope hook connected to the fixed hanging ring is provided at the end of the second steel wire rope away from the hydraulic winch. A movable pulley hook is rolled on the outer wall of the fixed hanging ring. By setting up the lifting structure, the hydraulic winch, the second steel wire rope, the fixed pulley, the rope hook, and the movable pulley hook are used in combination. The rope hook or the movable pulley hook can achieve the function of vertical movement. The rope hook or the movable pulley hook can quickly fall to the object and manually hook the object for lifting and transporting. This avoids the problems of existing auxiliary lifting devices for forklifts, where the hook is installed on the horizontal boom lug, which prevents the hook from moving vertically. It also avoids the problem of the hook not quickly falling to hook the object during transport, and the problem of insufficient diving depth of existing lifting devices when the object has a large drop. Therefore, it provides convenience for the handling of objects.

[0008] Preferably, the adjustment structure includes a fixed frame installed on the end face of the base and a hand-cranked winch set on the upper side of the fixed frame. A first steel wire rope is wound on the hand-cranked winch. A hook is provided at the end of the first steel wire rope away from the fixed frame. Positioning holes are symmetrically opened on the front and rear sides of the fixed frame. Positioning bolts are installed on the fixed frame through the positioning holes. Nuts are installed on the positioning bolts through threads.

[0009] Preferably, the base has symmetrically installed insertion holes and first threaded holes on its front and rear sides, and the base is fitted with fixing bolts through the first threaded holes.

[0010] Preferably, the inner cavity of the fixed frame is equipped with a fixed shaft, the boom includes a support arm that is rotatably mounted on the fixed shaft at one end via a bearing, a telescopic arm is slidably mounted in the inner cavity of the support arm, the support arm is equipped with a screw through a second threaded hole, and a handle is provided at the end of the screw away from the support arm.

[0011] Preferably, the bottom of the hydraulic winch is connected to the side wall of the support arm, the U-shaped frame is connected to the end of the telescopic arm away from the support arm, a limit ring is installed on the side wall of the support arm, and the second wire rope passes through the limit ring and is connected to the fixed pulley in a rolling connection.

[0012] Preferably, the hydraulic winch is equipped with two sets of hydraulic oil pipes, and the other end of the hydraulic oil pipes is provided with a quick-connect coupling.

[0013] Preferably, the side wall of the support arm is equipped with a connecting ring, the hook is connected to the connecting ring, and multiple sets of positioning holes are provided and evenly distributed on the fixing frame.

[0014] Beneficial effects: By setting up a lifting structure and using a hydraulic winch, a second wire rope, a fixed pulley, a rope hook, and a movable pulley hook in combination, the rope hook or movable pulley hook can move up and down. The rope hook or movable pulley hook can quickly descend to the item and be manually hooked for lifting and transporting. This avoids the problems of existing forklift auxiliary lifting devices where the hook is installed on the boom lug, preventing the hook from moving up and down, hindering the hook from quickly descending to hook the item during transport, and insufficient diving depth of existing lifting devices when the item has a significant drop. This provides convenience for the handling of items. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a lifting device used for forklift lifting;

[0016] Figure 2 This is a partial cross-sectional schematic diagram of a lifting device for forklift lifting;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of a lifting boom for a forklift lifting device;

[0018] Figure 4 This is a cross-sectional view of the base and adjustment structure of a lifting device for forklifts.

[0019] In the diagram: 1. Base; 11. Insertion hole; 12. First threaded hole; 2. Adjustment structure; 21. Fixing frame; 211. Positioning hole; 212. Fixing shaft; 22. Hand-cranked winch; 23. First wire rope; 24. Hook; 25. Positioning bolt; 26. Nut; 3. Boom; 31. Support arm; 311. Second threaded hole; 312. Connecting ring; 313. Limiting ring; 32. Telescopic arm; 33. Screw; 34. Handle; 4. Lifting structure; 41. Hydraulic winch; 411. Hydraulic oil pipe; 412. Quick connector; 42. U-shaped frame; 43. Second wire rope; 44. Fixed pulley; 45. Rope hook; 46. Fixed hanging ring; 47. Moving pulley hook; 5. Fixing bolt. Detailed Implementation

[0020] 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.

[0021] Example 1

[0022] This embodiment provides a lifting device for forklift lifting, such as... Figure 1-4 As shown, the hoisting device includes a base 1, an adjustment structure 2 is installed on the end face of the base 1, a boom 3 is rotatably installed on the adjustment structure 2, and a lifting structure 4 is installed on the boom 3.

[0023] The lifting structure 4 includes a hydraulic winch 41 and a U-shaped frame 42 mounted on the boom 3. A second steel wire rope 43 is wound on the hydraulic winch 41. A fixed pulley 44 is installed in the inner cavity of the U-shaped frame 42, and a fixed hanging ring 46 is set on the lower side of the U-shaped frame 42. A rope hook 45 connected to the fixed hanging ring 46 is provided at the end of the second steel wire rope 43 away from the hydraulic winch 41. A movable pulley hook 47 is rolled on the outer wall of the fixed hanging ring 46.

[0024] In use, the two sets of forks of the driving forklift are inserted into the two sets of insertion holes 11 respectively. Then, the driving fixing bolt 5 is rotated and moved down on the first threaded hole 12, so that the lower end of the fixing bolt 5 abuts against the end face of the fork, thus fixing the lifting device on the forklift forks. The two sets of quick-connect couplings 412 are quickly connected to the hydraulic oil tank of the forklift, providing hydraulic oil to the hydraulic winch 41 and connecting the hydraulic winch 41 to the distributor of the forklift. Then, the distributor of the forklift drives the hydraulic winch 41 to release the second wire rope 43. The second wire rope 43 moves on the fixed pulley 44. There are two situations. In the first situation, without the moving pulley hook 47 installed, the rope hook 45 is not connected to the fixed hanging ring 46. When the second wire rope 43 moves downward, it will bring the rope hook 45 down with it. The rope hook 45 moves down to the object and is hooked manually. Then, the distributor of the forklift drives the hydraulic winch 41 to reel in the second wire rope 43. In the first scenario, the wire rope 43 drives the rope hook 45 to move upwards to lift and transport items, achieving rapid lifting of items with a single rope. In the second scenario, the rope hook 45 hooks onto the fixed hanging ring 46. The rope hook 45 has a non-disengagement function. The movable pulley hook 47 rolls on the wall of the second wire rope 43. When the hydraulic winch 41 releases the second wire rope 43, the movable pulley hook 47 moves downwards to the item and hooks it. Then, the movable pulley hook 47 retracts the second wire rope 43. The movable pulley hook 47 lifts and transports the item while the second wire rope 43 is being retracted, achieving double-rope lifting of heavy objects. This increases the lifting capacity of the lifting device and avoids the problems of existing auxiliary lifting devices for forklifts, where the hook is installed on the horizontal boom lug, preventing the hook from moving up and down, and preventing the hook from quickly descending to hook the item during transport. It also avoids the problem of insufficient diving depth of existing lifting devices when the item has a significant drop. This provides convenience for the handling of items.

[0025] In this embodiment, the base 1 is symmetrically equipped with insertion holes 11 and first threaded holes 12 on its front and rear sides. The base 1 is equipped with fixing bolts 5 through the first threaded holes 12. The inner cavity of the fixing frame 21 is equipped with a fixing shaft 212. The boom 3 includes a support arm 31 with one end rotatably mounted on the fixing shaft 212 via a bearing. The inner cavity of the support arm 31 is slidably equipped with a telescopic arm 32. The support arm 31 is equipped with screws 33 through the second threaded holes 311. The end of the screw 33 away from the support arm 31 is provided with a handle 34.

[0026] The boom 3 is designed to extend and retract within the support arm 31, thereby adjusting the length of the boom 3. The handle 34 drives the screw 33 to hold the boom 32 in place, thus fixing the support arm 31 after adjustment. The length adjustment of the boom 3 increases the lifting height of the items.

[0027] In this embodiment, the bottom of the hydraulic winch 41 is connected to the side wall of the support arm 31, the U-shaped frame 42 is connected to the end of the telescopic arm 32 away from the support arm 31, the side wall of the support arm 31 is equipped with a limit ring 313, and the second wire rope 43 passes through the limit ring 313 and is rotatably connected to the fixed pulley 44; two sets of hydraulic oil pipes 411 are installed on the hydraulic winch 41, and the other end of the hydraulic oil pipes 411 is provided with a quick connector 412;

[0028] The limiting ring 313 serves to guide the second wire rope 43 and limit its position, ensuring its stable installation.

[0029] Example 2

[0030] Unlike embodiment 1, the adjustment structure 2 includes a fixed frame 21 installed on the end face of the base 1 and a hand-cranked winch 22 set on the upper side of the fixed frame 21. A first steel wire rope 23 is wound on the hand-cranked winch 22. A hook 24 is provided at the end of the first steel wire rope 23 away from the fixed frame 21. Positioning holes 211 are symmetrically opened on the front and rear sides of the fixed frame 21. Positioning bolts 25 are installed on the fixed frame 21 through the positioning holes 211. Nuts 26 are installed on the positioning bolts 25 through threads.

[0031] In use, the working drive hand-cranked winch 22 rotates forward or reverse, and the hand-cranked winch 22 retracts or releases the first wire rope 23. When the first wire rope 23 is retracted, it pulls the hook 24 upward, and the hook 24 pulls the connecting ring 312 upward. The connecting ring 312 pulls the support arm 31 to raise its height. Alternatively, the first wire rope 23 is released, and it pulls the hook 24 downward. The hook 24 drives the support arm 31 to fall. Then, the positioning bolt 25 is inserted into the corresponding positioning hole 211 on the lower side of the support arm 31, and the nut 26 is tightened on the positioning bolt 25 to lock the position of the support arm 31. This realizes the angle adjustment function of the boom 3, thereby improving the lifting height and diving depth of the forklift lifting device. This allows the forklift lifting device to be applied to multiple fields such as construction, logistics loading and unloading, and deep well pump lifting. It overcomes the disadvantage of cranes not being able to move goods over long distances, and combines the functions of forklifts and cranes, making the use of the forklift lifting device more effective.

[0032] In this embodiment, a connecting ring 312 is installed on the side wall of the support arm 31, the hook 24 is connected to the connecting ring 312, and multiple sets of positioning holes 211 are provided and evenly distributed on the fixing frame 21.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lifting device for forklift lifting, comprising a base (1), characterized in that: An adjustment structure (2) is installed on the end face of the base (1), a boom (3) is rotatably installed on the adjustment structure (2), and a lifting structure (4) is installed on the boom (3). The lifting structure (4) includes a hydraulic winch (41) and a U-shaped frame (42) mounted on the boom (3). A second steel wire rope (43) is wound on the hydraulic winch (41). A fixed pulley (44) and a fixed hanging ring (46) are installed in the inner cavity of the U-shaped frame (42). A rope hook (45) connected to the fixed hanging ring (46) is provided at one end of the second steel wire rope (43) away from the hydraulic winch (41). A movable pulley hook (47) is rolled on the outer wall of the fixed hanging ring (46).

2. The lifting device for forklift lifting according to claim 1, characterized in that: The adjustment structure (2) includes a fixed frame (21) installed on the end face of the base (1) and a hand-cranked winch (22) set on the upper side of the fixed frame (21). A first steel wire rope (23) is wound on the hand-cranked winch (22). A hook (24) is provided at the end of the first steel wire rope (23) away from the fixed frame (21). Positioning holes (211) are symmetrically opened on the front and rear sides of the fixed frame (21). Positioning bolts (25) are installed on the fixed frame (21) through the positioning holes (211). Nuts (26) are installed on the positioning bolts (25) through threads.

3. The lifting device for forklift lifting according to claim 1, characterized in that: The base (1) has symmetrically installed insertion holes (11) and first threaded holes (12) on its front and rear sides, and the base (1) is fitted with fixing bolts (5) through the first threaded holes (12).

4. The lifting device for forklift lifting according to claim 2, characterized in that: The inner cavity of the fixed frame (21) is equipped with a fixed shaft (212). The boom (3) includes a support arm (31) that is rotatably mounted on the fixed shaft (212) at one end via a bearing. A telescopic arm (32) is slidably mounted in the inner cavity of the support arm (31). A screw (33) is installed on the support arm (31) through a second threaded hole (311). A handle (34) is provided at the end of the screw (33) away from the support arm (31).

5. The lifting device for forklift lifting according to claim 4, characterized in that: The bottom of the hydraulic winch (41) is connected to the side wall of the support arm (31), the U-shaped frame (42) is connected to the end of the telescopic arm (32) away from the support arm (31), the side wall of the support arm (31) is equipped with a limit ring (313), and the second wire rope (43) passes through the limit ring (313) and is connected to the fixed pulley (44) in a rolling connection.

6. The lifting device for forklift lifting according to claim 1, characterized in that: The hydraulic winch (41) is equipped with two sets of hydraulic oil pipes (411), and the other end of the hydraulic oil pipes (411) is provided with a quick-connect fitting (412).

7. The lifting device for forklift lifting according to claim 4, characterized in that: The side wall of the support arm (31) is equipped with a connecting ring (312), the hook (24) is connected to the connecting ring (312), and the positioning hole (211) is provided in multiple sets and is evenly distributed on the fixing frame (21).

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