A crane hook pulley block

Abstract

This utility model relates to the field of crane hook technology, specifically a crane hook pulley assembly, including a fixed shell, a first roller, a load-bearing hook, and a mounting hook. The first roller is rotatably connected to the middle of the fixed shell, the load-bearing hook is rotatably located inside the right side of the fixed shell, and the mounting hook is located inside the left side of the fixed shell. The first roller has a positioning component for positioning and fixing the rope inside. In this crane hook pulley assembly, the positioning component inside the first roller includes two "L"-shaped positioning plates, with the pivot at the bend located on the right side of the first roller away from the center. Multiple second rollers are rotatably connected to the positioning plates. The rope passes between the first and second rollers, forming a shape that is wide at the bottom, narrow in the middle, and wide at the top. By utilizing gravity, the rope is pulled to achieve an automatic positive feedback tightening and positioning function, preventing the rope from slipping out, lowering the center of gravity of the fixed shell, and increasing the stability of the device operation.

Description

Technical Field

[0001] This utility model relates to the field of crane hook technology, specifically a crane hook pulley block. Background Technology

[0002] Crane hook pulley blocks are the core components of crane lifting mechanisms. They are mechanical devices composed of components such as hooks, pulleys, pulley shafts, hook beams, and wire ropes. Through the reasonable configuration of fixed and movable pulleys and the winding of wire ropes, they can lift, lower, and adjust the position of heavy objects, while also saving effort and changing the direction of force.

[0003] In the prior art, such as the crane hook pulley block disclosed in CN218664958U, a device solves the problem that different directions of wire rope traction may cause the wire rope to fall off the pulley, affecting the use of the crane. It prevents the wire rope from axially moving between the two moving pulley blocks and separating from them, thereby preventing the wire rope from tilting when it enters the crane hook pulley block and achieving the purpose of preventing the wire rope from slipping out of the crane hook pulley block.

[0004] This device uses a drive mechanism to move two adjacent rollers to clamp and position the rope. The pressure exerted by the rollers on the rope is directly and positively correlated with the rope tension. As the rope tension increases, a large concentrated stress is generated locally on the rope during the transmission of the vertical clamping force. Excessive local stress can damage the rope, affecting its service life and the safety of the device. The aforementioned device cannot automatically adjust the magnitude and direction of the clamping force according to the actual force conditions, making it difficult to achieve stable constraint on the rope. Under conditions of large fluctuations in rope tension, rope slippage or unstable device operation may occur. Therefore, we propose a crane hook pulley block. Utility Model Content

[0005] One of the technical problems this application aims to solve is that when the adjacent rollers are driven by the drive device to clamp the positioning rope with a force perpendicular to the rope, not only is the force direction singular and the pressure increases with the increase of rope tension, but it also lacks adaptive adjustment capability. At the same time, the low force transmission efficiency easily leads to local stress concentration in the rope.

[0006] To solve the above-mentioned technical problems, this application provides a crane hook pulley block, including a fixed shell, a first roller, a load-bearing hook, and an installation hook. The first roller is rotatably connected to the middle of the fixed shell, the load-bearing hook is rotatably inside the right side of the fixed shell, and the installation hook is disposed inside the left side of the fixed shell. The first roller is provided with a positioning element for positioning and fixing the rope inside.

[0007] Preferably, the positioning component includes two positioning plates rotatably connected to the front and rear sides inside the fixed shell. Multiple rollers are rotatably connected to the middle and edge of the positioning plates. The rotation axis of the positioning plate is located on the right side of the rollers away from the center.

[0008] Preferably, the outer wall of the roller is provided with a plurality of evenly distributed guide grooves, and the upper and lower sides of the interior of the fixed shell are provided with inclined blocks, the edges of the inclined blocks being tangent to the arc of the roller that accommodates the rope.

[0009] Preferably, the interior of the fixed shell is provided with an installation groove, the depth of which is consistent with the height of the non-rope receiving parts on the upper and lower sides of the roller.

[0010] Preferably, the positioning plate is L-shaped, and its rotation axis is located at the bend of the positioning plate.

[0011] Preferably, the distance between the two rollers at the edge and the roller at the bend within the same positioning plate is less than the diameter of the rope.

[0012] Preferably, the inner left side of the fixed shell is rotatably connected to two baffles, the right end of the baffles is provided with a second gear, the middle part of the positioning plate is provided with a first gear, the first gear and the second gear mesh with each other, and the left end of the baffles is rotatably connected to a third roller.

[0013] This utility model has at least the following beneficial effects:

[0014] 1. The positioning component inside roller one includes two "L"-shaped positioning plates. The pivot at the bend is located on the right side of roller one, away from the center. Multiple roller twos are rotatably connected to the positioning plates. The rope passes between roller one and roller two, forming a shape that is wide at the bottom, narrow in the middle, and wide at the top. The rope is pulled by gravity to achieve the automatic positive feedback tightening and positioning function of the rope, preventing the rope from slipping out and lowering the center of gravity of the fixed shell, thereby increasing the stability of the device operation.

[0015] 2. The roller in the middle of the fixed shell can be used with the rope to pull the fixed shell up and down. The guide groove on its outer wall can provide friction and prevent the rope from slipping out. The inclined block inside the fixed shell helps guide the installation of the rope. The installation groove can reduce the height difference between the roller and the fixed shell to prevent the rope from slipping out. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the positioning plate structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the inclined block structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the guide groove structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0021] In the diagram: 1. Fixed shell; 2. Roller 1; 21. Inclined block; 22. Mounting groove; 23. Guide groove; 3. Load-bearing hook; 4. Mounting hook; 5. Positioning component; 51. Positioning plate; 52. Roller 2; 53. Gear 1; 54. Baffle; 55. Gear 2; 56. Roller 3. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to Figure 1-4 This utility model provides a technical solution: a crane hook pulley block, including a fixed shell 1, a roller 2, a load-bearing hook 3 and an installation hook 4. The roller 2 is rotatably connected to the middle of the fixed shell 1, the load-bearing hook 3 is rotatably inside the right side of the fixed shell 1, and the installation hook 4 is set inside the left side of the fixed shell 1. The roller 2 is provided with a positioning element 5 for positioning and fixing the rope.

[0024] The load-bearing hook 3 can rotate to hang goods, the roller 2 can be used with ropes to pull the fixed shell 1 up and down, and the mounting hook 4 can provide additional rope attachment points for use with different numbers of pulleys.

[0025] Furthermore, the positioning component 5 includes two positioning plates 51 rotatably connected to the front and rear sides inside the fixed shell 1. Multiple rollers 52 are rotatably connected to the middle and edge of the positioning plates 51. The rotation axis of the positioning plates 51 is located on the right side of the rollers 2 away from the center.

[0026] The positioning plate 51 is L-shaped, and its rotation axis is at the bend of the positioning plate 51;

[0027] The positioning plate 51 is not a right-angled triangle, and the length from the roller 52 furthest from roller 2 to the pivot of the positioning plate 51 is greater than the length from the roller 52 closest to roller 2 to the pivot of the positioning plate 51. This forms a lever system between the positioning plate 51 and the multiple rollers 52. The roller 52 furthest from roller 2 is the end of the effort-saving lever, and the roller 52 closest to roller 2 is the end of the effort-consuming lever. This allows the end of the effort-saving lever to easily drive the positioning plate 51 to rotate. There are rollers 52 at its three fixed points. The diameter of the rollers 52 at the pivot is larger than that at the edge. The pivots of the two positioning plates 51 and the rotation center of roller 2 are two points on an isosceles triangle. The pivots of the two positioning plates 51 are inside the parallel tangent of roller 2. When installing the rope, it needs to pass between roller 2 and the rollers 52 at the pivot and the rollers 52 at the edge before it can be put into use.

[0028] Furthermore, the outer wall of the roller 2 is provided with multiple evenly distributed guide grooves 23, and the upper and lower sides of the inside of the fixed shell 1 are provided with inclined blocks 21, the edges of the inclined blocks 21 being tangent to the arc of the roller 2 that accommodates the rope.

[0029] The guide groove 23 is perpendicular to the rotating surface of the roller 2, which can provide the friction force required for the rope to rotate the roller 2. At the same time, the guide groove 23 can reduce the vertical friction between the rope and the rotating plane of the roller 2, and prevent the rope from sliding out of the inner wall of the roller 2 when the device moves or deviates suddenly. The inclined block 21 is an inclined surface with an angle around the roller 2, which can help guide the installation of the rope so that the rope can slide directly to the outer wall of the roller 2.

[0030] Furthermore, the interior of the fixed shell 1 is provided with an installation groove 22, the depth of which is the same as the height of the non-rope receiving parts on the upper and lower sides of the roller 2.

[0031] Mounting groove 22 can reduce the height difference between the curved surface of roller 2 and the fixed shell 1, thereby preventing the rope from slipping at the edge of roller 2.

[0032] Furthermore, the distance between the two rollers 52 at the edge and the roller 52 at the bend inside the same positioning plate 51 is less than the diameter of the rope;

[0033] When the rope passes through multiple rollers 52 and is installed inside the positioning plate 51, the rope is not in a straight line among the rollers 52, but rather forms a zigzag shape. When the device is in use, and a heavy object is hung on the lower part of the load-bearing hook 3, the rope is pulled and tightened by the fixed shell 1. At this time, the roller 52 on the side of the positioning plate 51 away from the roller 2 is pushed outward under the pressure of the rope. The positioning plate 51 rotates, causing the roller 52 closest to the roller 2 to press against and squeeze the rope, moving it towards the roller 2. At this time, the roller 52 at the pivot point begins to... Finally, the rope remains in contact, guiding its sliding. At this point, the rope inside the fixed shell 1 has an arc shape that fits against the outer wall of the roller 2 and a zigzag line that pulls towards the center away from the roller 2, and a zigzag line that shifts outward inside the positioning plate 51. That is, it has a shape that is wide at the bottom, narrow in the middle, and wide at the top. This forms an automatic positive feedback tightening and positioning function for the rope, which can reduce the rope from slipping out of the roller 2 during device operation and indirectly lower the center of gravity of the fixed shell 1, thereby increasing the operational stability of the device.

[0034] Example 2: Please refer to Figure 5 Based on Embodiment 1, this utility model provides another technical solution: two baffles 54 are rotatably connected to the left side of the inside of the fixed shell 1. A gear 2 55 is provided at the right end of the baffle 54, and a gear 1 53 is provided in the middle of the positioning plate 51. The gear 1 53 and the gear 2 55 mesh with each other. A roller 3 56 is rotatably connected to the left end of the baffle 54.

[0035] When the positioning plate 51 rotates, it can drive the gear 1 53 to rotate. The gear 1 53 drives the gear 2 55 to rotate through meshing. This allows the positioning plate 51 and the baffle 54 to form a clamping and positioning structure. The roller 3 56 can fit against the inside of the rope, thereby stabilizing the rope in the same position after it is clamped and fixed, preventing the rope from slipping off the top of the positioning plate 51 due to shaking.

[0036] 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 process, method, article, or apparatus.

[0037] 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.

Claims

1. A crane hook pulley block, comprising a fixed housing (1), a roller (2), a load-bearing hook (3), and a mounting hook (4), characterized in that: The roller (2) is rotatably connected to the middle of the fixed shell (1), the load-bearing hook (3) is rotatably inside the right side of the fixed shell (1), the mounting hook (4) is located inside the left side of the fixed shell (1), and the roller (2) is provided with a positioning element (5) for positioning and fixing the rope.

2. The crane hook pulley block according to claim 1, characterized in that: The positioning component (5) includes two positioning plates (51) rotatably connected to the front and rear sides inside the fixed shell (1). Multiple rollers (52) are rotatably connected to the middle and edge of the positioning plate (51). The pivot of the positioning plate (51) is located on the right side of the roller (2) away from the center.

3. The crane hook pulley block according to claim 1, characterized in that: The outer wall of the roller (2) is provided with a plurality of evenly distributed guide grooves (23), and the upper and lower sides of the interior of the fixed shell (1) are provided with inclined blocks (21), the edge of the inclined blocks (21) being tangent to the arc of the roller (2) that accommodates the rope.

4. The crane hook pulley block according to claim 3, characterized in that: The fixed shell (1) has an installation groove (22) inside, and the depth of the installation groove (22) is the same as the height of the non-rope receiving parts on the upper and lower sides of the roller (2).

5. The crane hook pulley block according to claim 2, characterized in that: The positioning plate (51) is "L" shaped, and its rotation axis is at the bend of the positioning plate (51).

6. The crane hook pulley block according to claim 2, characterized in that: The distance between the two rollers (52) at the edge and the rollers (52) at the bend of the same positioning plate (51) is less than the diameter of the rope.

7. The crane hook pulley block according to claim 2, characterized in that: The fixed shell (1) has two baffles (54) rotatably connected to the left side inside. The right end of the baffle (54) is provided with a gear two (55), and the middle part of the positioning plate (51) is provided with a gear one (53). The gear one (53) and the gear two (55) mesh with each other. The left end of the baffle (54) is rotatably connected with a roller three (56).

Images