Safety tool for hook head of travelling crane

Abstract

The invention relates to the technical field of crane hook heads, discloses a crane hook head safety tool, and solves the problems that when a lifting rope or a lifting ring is mounted by the device, a gear lever needs to be continuously shifted, and due to the fact that the use condition of the device is more every day, a torsional spring is extremely easily damaged by shifting a large number of gear levers, and the safety of the lifting rope or the lifting ring is influenced. The lifting hook comprises a lifting hook body, an anti-falling device is installed in the lifting hook body, a containing groove is formed in the lifting hook body, a buckle assembly is installed in the containing groove, the anti-falling device comprises a balance weight rod, and two first connecting blocks are rotatably installed on the inner side of one end of the balance weight rod; limiting rods are rotationally installed on the opposite sides of the two first connecting blocks, torsional springs are connected to the outer sides of the limiting rods, the two ends of the torsional springs are fixedly connected with the first connecting blocks correspondingly, U-shaped blocking blocks are rotationally installed at the ends, away from the torsional springs, of the limiting rods, elastic assemblies are fixedly installed at the upper ends of the U-shaped blocking blocks, and gear strips are fixedly installed at the lower ends of the U-shaped blocking blocks.

Description

Technical Field

[0001] The invention relates to the technical field of crane hook heads, in particular to a crane hook head safety tool. Background Art

[0002] As a common tool in industrial production, cranes play an important role in lifting operations. The existing crane hooks are ordinary C-shaped hooks without any safety measures at the opening. Once the crane is overloaded, the C-shaped hook is easy to detach from the tooling lifting hole, which is very dangerous.

[0003] The existing Chinese patent with publication number CN221759331U discloses an anti-unhooking device for a crane, which places a lifting rope or a lifting ring inside a hook body and then rotates a blocking rod so that the blocking rod drives a limiting rod to rotate until the limiting rod rotates with the blocking rod to contact the hook body, thereby reducing the probability of the lifting rope or the lifting ring detaching from the inside of the hook body. The rotation of the blocking rod can drive the torsion spring to twist and deform, and at the same time as the blocking rod rotates, the limiting pin can also be driven to rotate. When the limiting rod rotates to contact the hook body, the limiting pin rotates with the blocking rod to a position corresponding to the limiting groove, and then the elastic action of the first spring can pull the traction block and the limiting pin to move to one side of the sleeve block until the limiting pin is inserted into the inside of the limiting groove, thereby achieving a limiting effect on the blocking rod and the limiting rod.

[0004] When installing the lifting rope or lifting ring, the device needs to constantly move the lever. Since the device is used frequently every day, a large number of lever movements can easily cause damage to the torsion spring, resulting in reduced safety and increased frequency of equipment maintenance, which greatly affects the use of the device. Summary of the invention

[0005] In order to solve all or part of the above-mentioned problems, the purpose of the present invention is to provide a crane hook head safety tooling to solve the problem that the device proposed in the above-mentioned comparative document technology needs to continuously turn the gear lever when installing the lifting rope or the lifting ring. Since the device is used frequently every day, a large number of turning the gear lever will easily cause damage to the torsion spring, resulting in reduced safety and increased frequency of equipment maintenance.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a kind of safety tool for a driving hook head, comprising a hook, an anti-falling device is installed inside the hook, a placement groove is provided inside the hook, a buckle assembly is installed inside the placement groove, the anti-falling device comprises a counterweight rod, two sets of connecting blocks are rotatably installed inside one end of the counterweight rod, a limiting rod is rotatably installed on the opposite side of the two sets of connecting blocks, a torsion spring is connected to the outside of the limiting rod, the two ends of the torsion spring are respectively fixedly connected to the connecting block, and the limiting rod is away from the torsion spring. The U-shaped blocking block is rotatably installed at the end, an elastic component is fixedly installed at the upper end of the U-shaped blocking block, and a gear bar is fixedly installed at the lower end of the U-shaped blocking block. The gear bar is located at the upper end of the buckle component and meshes with it. When the lifting rope or the lifting ring is installed, the limit rod is pressed downward to drive the counterweight rod to rotate counterclockwise. When the U-shaped blocking block at one end of the limit rod is separated from the close contact state with the hook, the U-shaped blocking block rotates counterclockwise along the end of the limit rod away from the installation groove as the axis under the elastic thrust of the elastic component. The U-shaped block is rotated, thereby driving the gear bar at the lower end of the U-shaped barrier block to move along the direction of the placement groove, driving the buckle assembly to rotate, completing the engagement, and then completing the fixation of the limit rod. In this state, a sufficiently large gap is formed between the U-shaped barrier block and the hook, which is sufficient to complete the placement of multiple ropes or rings without hindrance, reducing the damage to the torsion spring caused by multiple artificial rotations of the limit rod. After completing the placement of the rope or ring, the counterweight rod is pressed downward with force, so that the counterweight rod gives the limit rod a clockwise rotation. The force drives the gear bar to give the buckle assembly a reverse force away from the mounting groove, so that the gear bar drives the buckle assembly to disengage. At the same time, the limit rod drives the U-shaped barrier block close to the hook under the action of the torsion spring and the counterweight rod. When the U-shaped barrier block is close to the hook, the upper end contacts the hook first, and when the counterweight rod is pressed, the U-shaped barrier block gradually flips clockwise, thereby driving the elastic assembly to reset and making the U-shaped barrier block close to the hook to restore its original state, thus completing the anti-falling setting of the hook.

[0007] Furthermore, two groups of circular holes are opened at the upper end of the placement groove, and torsion springs are rotatably arranged inside the circular holes, and the counterweight rod and the limit rod rotate with the circular holes as the axis.

[0008] Furthermore, the snap assembly includes a rotating gear, both ends of the rotating gear are rotatably installed with connecting blocks 2, the lower end of the connecting block 2 is fixedly connected to the hook, and a connecting rod 1 is installed through the inside of the two groups of connecting blocks 2, the ends of the two groups of connecting rods 1 that are close to each other are fixedly connected to the rotating gear, and the ends of the two groups of connecting rods 1 that are far away from each other are fixedly installed with a U-shaped frame. Under the action of the elastic component, the U-shaped blocking block rotates counterclockwise, thereby driving the gear bar at the lower end of the U-shaped blocking block to move along the direction of the limiting rod. When the gear bar engages and rotates with the rotating gear, the U-shaped frame is driven to rotate through the rotating gear, and then engaged.

[0009] Furthermore, the buckle assembly also includes two groups of square grooves, which are opened inside the accommodating grooves, and multiple groups of elastic parts are fixedly installed inside the square grooves. The ends of the elastic parts that are close to each other are fixedly installed with locking rods. The two groups of locking rods have opposite magnetic properties. When the rotating gear drives the U-shaped frame to rotate, the U-shaped frame is rotated to the inner side of the two groups of locking rods to lock the U-shaped frame, and then the gear bar is locked, so that the entire anti-falling device is fixed, and the clamping force between the two groups of locking rods is greater than the gravity of the counterweight rod and the limit rod and the torsional force of the torsion spring.

[0010] Furthermore, an annular groove is provided at one end of the connecting block 1 close to the counterweight rod, and a connecting rod 2 is slidably installed inside the annular groove. The end of the connecting rod 2 away from the connecting block 1 is fixedly connected to the counterweight rod. After the U-shaped barrier block is brought close to the hook, the counterweight rod is rotated in the annular groove by pushing it upward. After it is raised to a certain limit, the counterweight rod is released, and the U-shaped barrier block and the hook are tightly attached due to the inertia of the counterweight rod.

[0011] Furthermore, the elastic component includes a fixed box, the lower end of the fixed box is fixedly connected to the limit rod, an elastic member 2 is fixedly installed inside the fixed box, a slider is fixedly installed at one end of the elastic member 2, the slider is slidably connected to the fixed box, a T-shaped slider is rotatably installed at one end of the slider away from the elastic member 2, a fixed block is fixedly installed at one end of the T-shaped slider away from the slider, and the end of the fixed block away from the T-shaped slider is rotatably connected to the U-shaped blocking block. When the U-shaped blocking block at one end of the limit rod is disengaged from the hook, the U-shaped blocking block rotates counterclockwise under the push of the slider, driving the fixed block to rotate, and then driving the gear bar at the lower end of the U-shaped blocking block to move along the direction of the mounting groove, driving the buckle assembly to rotate, and completing the engagement.

[0012] Furthermore, one end of the gear bar is rotatably connected to the U-shaped blocking block, and multiple sets of racks are fixedly installed on the lower side of one end of the gear bar away from the U-shaped blocking block. The gear bar meshes with the rotating gear through the racks to complete the engagement of the device.

[0013] Furthermore, the rotating gear is meshed with the gear bar, and in an initial state, the gear bar is located at the upper end of the buckle assembly and is in contact with it.

[0014] Furthermore, the elastic member 2 is in a contracted state in an initial state. When the U-shaped barrier block at one end of the limit rod is detached from the hook, the U-shaped barrier block pushes the slider to slide through the taut elastic member 2, so that the U-shaped barrier block flips over. When the U-shaped barrier block is close to the hook and completes the flipping and resetting, the U-shaped barrier block completes the resetting under the friction force of the hook, so that the elastic member 2 returns to its initial state.

[0015] Furthermore, the U-shaped blocking block is tightly fitted with the hook in an initial state. In the initial state, the U-shaped blocking block and the hook cannot be separated and are in a tightly fitted state.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a hook head safety device for installing a lifting rope or a lifting ring, by pressing the limit rod downward, the limit rod drives the counterweight rod to rotate counterclockwise. When the U-shaped blocking block at one end of the limit rod is disengaged from the lifting hook, the U-shaped blocking block rotates counterclockwise under the action of the elastic component, thereby driving the gear bar at the lower end of the U-shaped blocking block to move along the direction of the limit rod, driving the buckle assembly to rotate, completing the engagement, so that the limit rod is fixed, and the placement of multiple lifting ropes or lifting rings is completed, preventing the torsion spring from being damaged by repeatedly turning the limit rod. After the placement of the lifting rope or the lifting ring is completed, the counterweight rod is pressed downward, so that the gear bar drives the buckle assembly to rotate in the opposite direction, and the buckle assembly is disengaged. At the same time, under the action of the torsion spring and the counterweight rod, the limit rod drives the U-shaped blocking block to approach the lifting hook, so that it completes the flipping and resetting, and the lifting hook is prevented from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the hook structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the buckle assembly of the present invention; Figure 4 It is a schematic diagram of the planar structure of the buckle assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the anti-falling device of the present invention; Figure 6 It is a schematic diagram of the structure of the connecting block 1 and the torsion spring of the present invention; Figure 7 It is a schematic diagram of the structure of the elastic component of the present invention; Figure 8 It is a schematic diagram of the planar structure of the anti-falling device of the present invention.

[0018] In the figure: 1. hook; 11. placement groove; 12. round hole; 13. buckle assembly; 131. rotating gear; 132. connecting block 2; 133. connecting rod 1; 134. U-shaped frame; 135. locking rod; 136. square groove; 137. elastic member 1; 2. anti-falling device; 21. counterweight rod; 22. connecting block 1; 221. ring groove; 222. connecting rod 2; 23. torsion spring; 24. limit rod; 25. U-shaped blocking block; 26. elastic assembly; 261. fixed box; 262. elastic member 2; 263. slider; 264. T-shaped slider; 265. fixed block; 27. gear bar; 271. rack. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0021] Combination Figure 1-2 , Figure 5A hook head safety tooling, comprising a hook 1, an anti-drop device 2 is installed inside the hook 1, a placement groove 11 is opened inside the hook 1, a buckle assembly 13 is installed inside the placement groove 11, the anti-drop device 2 comprises a counterweight rod 21, two sets of connecting blocks 22 are rotatably installed on the inner side of one end of the counterweight rod 21, a limiting rod 24 is rotatably installed on the opposite side of the two sets of connecting blocks 22, a torsion spring 23 is connected to the outer side of the limiting rod 24, the two ends of the torsion spring 23 are respectively fixedly connected to the connecting block 22, and a U-shaped barrier is rotatably installed on the end of the limiting rod 24 away from the torsion spring 23 The upper end of the U-shaped blocking block 25 is fixedly installed with an elastic component 26, and the lower end of the U-shaped blocking block 25 is fixedly installed with a gear bar 27. The gear bar 27 is located at the upper end of the buckle component 13 and meshes with it. When the lifting rope or the lifting ring is installed, the limiting rod 24 is pressed downward to drive the counterweight rod 21 to rotate counterclockwise. When the U-shaped blocking block 25 at one end of the limiting rod 24 is out of the close contact state with the hook 1, the U-shaped blocking block 25 is rotated counterclockwise along the end of the limiting rod away from the installation groove as the axis under the elastic thrust of the elastic component 26, thereby driving The gear bar 27 at the lower end of the U-shaped blocking block 25 moves along the direction of the placement groove 11, driving the buckle assembly 13 to rotate, completing the engagement, and then completing the fixation of the limit rod 24. In this state, a sufficiently large gap is formed between the U-shaped blocking block 25 and the hook 1, which is sufficient to complete the placement of multiple ropes or rings without hindrance, reducing the damage to the torsion spring 23 caused by multiple artificial rotations of the limit rod 24. After completing the placement of the rope or ring, the counterweight rod 21 is pressed downward with force, so that the counterweight rod 21 gives the limit rod 24 a clockwise rotation force, thereby driving the gear bar 27 to rotate clockwise, thereby completing the fixation of the limit rod 24. The wheel bar 27 applies a reverse force to the buckle assembly 13 away from the mounting groove 11, so that the gear bar 27 drives the buckle assembly 13 to disengage, and at the same time, the limit rod 24, under the action of the torsion spring 23 and the counterweight rod 21, drives the U-shaped blocking block 25 to approach the hook 1. When the U-shaped blocking block 25 is close to the hook 1, the upper end first contacts the hook 1, and when the counterweight rod 21 is pressed, the U-shaped blocking block 25 gradually flips clockwise, thereby driving the elastic assembly 26 to reset, and at the same time, the U-shaped blocking block 25 is close to the hook 1 to restore its original state, completing the anti-falling setting of the hook 1.

[0022] Combination Figure 2 Two groups of circular holes 12 are opened at the upper end of the placement groove 11. A torsion spring 23 is rotatably arranged inside the circular hole 12, and the counterweight rod 21 and the limit rod 24 rotate around the circular hole 12 as the axis.

[0023] Combination Figure 2-4The buckle assembly 13 includes a rotating gear 131, and connecting blocks 132 are rotatably installed at both ends of the rotating gear 131. The lower end of the connecting block 132 is fixedly connected to the hook 1. A connecting rod 133 is installed inside the two groups of connecting blocks 132. The ends of the two groups of connecting rods 133 that are close to each other are fixedly connected to the rotating gear 131, and the ends of the two groups of connecting rods 133 that are far away from each other are fixedly installed with a U-shaped frame 134. The U-shaped blocking block 25 rotates counterclockwise under the action of the elastic component 26, thereby driving the gear bar 27 at the lower end of the U-shaped blocking block 25 to move along the direction of the limiting rod 24. When the gear bar 27 engages and rotates with the rotating gear 131, the U-shaped frame 134 is driven to rotate through the rotating gear 131, and then engages.

[0024] Combination Figure 2 and Figure 4 The buckle assembly also includes two groups of square grooves 136, which are opened inside the placement groove 11. Multiple groups of elastic members 137 are fixedly installed inside the square grooves 136. The ends of the elastic members 137 close to each other are fixedly installed with engaging rods 135. The two groups of engaging rods 135 have opposite magnetic properties. When the rotating gear 131 drives the U-shaped frame 134 to rotate, the U-shaped frame 134 rotates to the inner side of the two groups of engaging rods 135, and the U-shaped frame 134 is engaged, and then the gear bar 27 is engaged, so that the entire anti-falling device 2 is fixed, and the clamping force between the two groups of engaging rods 135 is greater than the gravity of the counterweight rod 21 and the limit rod 24 and the torsional force of the torsion spring 23.

[0025] Combination Figure 5-6 An annular groove 221 is provided at one end of the connecting block 22 close to the counterweight rod 21, and a connecting rod 222 is slidably installed inside the annular groove 221. The end of the connecting rod 222 away from the connecting block 22 is fixedly connected to the counterweight rod 21. After the U-shaped blocking block 25 is brought close to the hook 1, the counterweight rod 21 is pushed upward to rotate in the annular groove 221. After it is raised to a certain limit, the counterweight rod 21 is released, and the U-shaped blocking block 25 and the hook 1 are tightly attached due to the inertia of the counterweight rod 21.

[0026] Combination Figure 5 and Figure 7The elastic component 26 includes a fixed box 261, the lower end of the fixed box 261 is fixedly connected to the limit rod 24, an elastic member 262 is fixedly installed inside the fixed box 261, one end of the elastic member 262 is fixedly installed with a slider 263, the slider 263 is slidably connected to the fixed box 261, and the end of the slider 263 away from the elastic member 262 is rotatably installed with a T-shaped slider 264, and the end of the T-shaped slider 264 away from the slider 263 is fixedly installed with a fixed block 265, and the end of the fixed block 265 away from the T-shaped slider 264 is rotatably connected to the U-shaped blocking block 25. When the U-shaped blocking block 25 at one end of the limit rod 24 is separated from the hook 1, the U-shaped blocking block 25 is pushed by the slider 263 to rotate counterclockwise, driving the fixed block 265 to rotate, and then driving the gear bar 27 at the lower end of the U-shaped blocking block 25 to move along the direction of the placement groove 11, driving the buckle assembly 13 to rotate, and completing the engagement.

[0027] Combination Figure 5 and Figure 8 One end of the gear bar 27 is rotatably connected to the U-shaped blocking block 25, and a plurality of racks 271 are fixedly installed on the lower side of one end of the gear bar 27 away from the U-shaped blocking block 25. The gear bar 27 meshes with the rotating gear 131 through the racks 271 to complete the engagement of the device.

[0028] Combination Figure 2 and Figure 5 The rotating gear 131 is meshed with the gear bar 27. In the initial state, the gear bar 27 is located at the upper end of the buckle assembly 13 and contacts therewith.

[0029] Combination Figure 5 and Figure 7 The elastic member 262 is in a contracted state in the initial state. When the U-shaped blocking block 25 at one end of the limiting rod 24 is separated from the hook 1, the U-shaped blocking block 25 pushes the slider 263 to slide through the tight elastic member 262, so that the U-shaped blocking block 25 is flipped. When the U-shaped blocking block 25 is close to the hook 1 and completes the flipping and resetting, the U-shaped blocking block 25 is reset under the friction force of the hook 1, so that the elastic member 262 returns to its initial state.

[0030] Combination Figure 1 and Figure 5 In the initial state, the U-shaped blocking block 25 is tightly fitted with the hook 1. In the initial state, the U-shaped blocking block 25 and the hook 1 cannot be separated and are in a tightly fitted state.

[0031] It should be noted that, in the description of the present application, it should be understood that the terms "length", "thickness", "inside", "outside", "axial", "radial", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hook head safety tool, comprising a hook (1), an anti-drop device (2) is installed inside the hook (1), a placement groove (11) is opened inside the hook (1), and a buckle assembly (13) is installed inside the placement groove (11), characterized in that: The anti-falling device (2) comprises a counterweight rod (21), two groups of connecting blocks (22) are rotatably mounted on the inner side of one end of the counterweight rod (21), a limiting rod (24) is rotatably mounted on the opposite side of the two groups of connecting blocks (22), a torsion spring (23) is connected to the outer side of the limiting rod (24), the two ends of the torsion spring (23) are respectively fixedly connected to the connecting block (22), a U-shaped blocking block (25) is rotatably mounted on the end of the limiting rod (24) away from the torsion spring (23), an elastic component (26) is fixedly mounted on the upper end of the U-shaped blocking block (25), and a gear bar (27) is fixedly mounted on the lower end of the U-shaped blocking block (25), and the gear bar (27) is located at the upper end of the buckle component (13) and meshes with it.

2. A driving hook head safety tool as claimed in claim 1, characterized in that: Two groups of circular holes (12) are formed at the upper end of the placement groove (11), and torsion springs (23) are rotatably arranged inside the circular holes (12).

3. The hook head safety tooling according to claim 1, characterized in that: The buckle assembly (13) comprises a rotating gear (131), both ends of the rotating gear (131) are rotatably mounted with connecting blocks 2 (132), the lower end of the connecting block 2 (132) is fixedly connected to the hook (1), and connecting rods 1 (133) are installed through the interiors of the two groups of connecting blocks 2 (132), the ends of the two groups of connecting rods 1 (133) close to each other are fixedly connected to the rotating gear (131), and the ends of the two groups of connecting rods 1 (133) away from each other are fixedly mounted with a U-shaped frame (134).

4. A driving hook head safety tool as claimed in claim 3, characterized in that: The buckle assembly further comprises two groups of square grooves (136), the square grooves (136) being arranged inside the placement groove (11), a plurality of groups of elastic members (137) being fixedly mounted inside the square grooves (136), a locking rod (135) being fixedly mounted on the mutually adjacent ends of the elastic members (137), and the two groups of locking rods (135) having opposite magnetic properties.

5. The hook head safety tool according to claim 1, characterized in that: An annular groove (221) is formed at one end of the connecting block 1 (22) close to the counterweight rod (21), and a connecting rod 2 (222) is slidably mounted inside the annular groove (221). An end of the connecting rod 2 (222) away from the connecting block 1 (22) is fixedly connected to the counterweight rod (21).

6. The hook head safety tool according to claim 1, characterized in that: The elastic component (26) comprises a fixed box (261), the lower end of the fixed box (261) is fixedly connected to the limit rod (24), a second elastic member (262) is fixedly installed inside the fixed box (261), a slider (263) is fixedly installed at one end of the second elastic member (262), the slider (263) is slidably connected to the fixed box (261), a T-shaped slider (264) is rotatably installed at one end of the slider (263) away from the second elastic member (262), a fixed block (265) is fixedly installed at one end of the T-shaped slider (264) away from the slider (263), and one end of the fixed block (265) away from the T-shaped slider (264) is rotatably connected to the U-shaped blocking block (25).

7. The hook head safety tool according to claim 1, characterized in that: One end of the gear bar (27) is rotatably connected to the U-shaped blocking block (25), and a plurality of racks (271) are fixedly mounted on the lower side of one end of the gear bar (27) away from the U-shaped blocking block (25).

8. The hook head safety tool according to claim 7, characterized in that: The rotating gear (131) is meshed with the gear bar (27).

9. The hook head safety tool according to claim 6, characterized in that: The second elastic member (262) is in a contracted state in an initial state.

10. The hook head safety tool according to claim 7, characterized in that: The U-shaped blocking block (25) is tightly fitted to the hook (1) in the initial state.

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