A crane hook with high safety performance

Abstract

The present invention relates to the technical field of crane hanging elements, and in particular to a crane hook with high safety performance. The technical problem is that the current crane hook is not convenient for supporting the hook tip during the lifting operation, and the hook mouth of the hook may be deformed, resulting in poor safety effect of the hook during the lifting operation. A crane hook with high safety performance includes a connecting block, a support shell is rotatably connected to the connecting block, and a cavity is opened inside the support shell. The downward movement of the hook will cause the two rotating frames to rotate downward, and then the columnar structures of the two rotating frames will contact the two sides of the cargo lifting ring through the buffer pads respectively. When the hook moves to the bottom, the two synchronous frames will cause the two rotating frames to squeeze the cargo lifting ring from both sides, and then limit the cargo lifting ring through the two rotating frames, so that the lifting ring is more stable on the hook, thereby further enhancing the safety effect of the hook during the lifting operation.

Description

Technical Field

[0001] The invention relates to the technical field of crane hanging elements, and in particular to a crane hook with high safety performance. Background Art

[0002] In many fields such as modern industry and logistics, cranes are indispensable and important equipment. As a key component in the crane lifting operation, the performance of the hook is directly related to the safety and efficiency of the entire lifting process. After the cargo lifting ring is hung on the hook, the hook mouth will be blocked by the hook guard strip. At the same time, in order to buffer the impact force caused by the sudden tightening of the sling, the hook will squeeze the hydraulic oil by sliding, thereby buffering the hook, and locking the hook guard strip while buffering to improve the safety of the hook.

[0003] Since the hook mouth may be deformed due to reasons such as excessive cargo and metal fatigue, and the current crane hook is not convenient for supporting the hook tip during lifting operations, the hook mouth may be deformed, and the existing crane hook is not convenient for limiting the cargo lifting ring in multiple directions, which causes the lifting ring to be unstable on the hook, resulting in poor safety effect of the hook during lifting operations. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention provides a crane hook with high safety performance, which can support the hook tip during the hook lifting operation so that the hook mouth is not easily deformed and can limit the cargo lifting ring in multiple directions so that the lifting ring is more stable on the hook, thereby enhancing the safety effect of the hook during the lifting operation.

[0005] The technical solution is as follows: A crane hook with high safety performance includes a connecting block, a supporting shell is rotatably connected to the connecting block, a cavity is opened inside the supporting shell, a hook is slidably connected to the supporting shell, a groove is opened at the hook tip of the hook, a hook guard strip is rotatably connected to the middle of one side of the hook mouth, the bottom of the hook guard strip is in contact with the hook tip of the hook, a closed loop is formed between the hook and the hook guard strip, two first torsion springs are connected between the hook guard strip and the hook, the two first torsion springs are symmetrically arranged, a locking mechanism for locking the hook guard strip is provided on the hook, and a closing mechanism for covering the hook mouth is provided on the hook.

[0006] Optionally, the locking mechanism includes a piston plate, which is fixedly connected to the top of the hook, the outer side of the piston plate is in contact with the inner wall of the cavity of the support shell, and two circulation holes are opened on the piston plate, a tension spring is connected between the top of the hook and the top inside the support shell, a first guide sleeve is fixedly connected to the side of the support shell close to the hook guard strip, a lifting frame is slidably connected in the first guide sleeve, a sliding groove is opened at the bottom of the lifting frame, a connecting frame is fixedly connected to the top of the hook guard strip, and the connecting frame is slidably connected to the sliding groove of the lifting frame.

[0007] Optionally, the closing mechanism includes a guide frame, which is fixedly connected to one side of the middle part of the hook, and two square grooves are opened on the side of the guide frame away from the supporting shell. The first guide sleeve is rotatably connected to the first crankshaft on the side away from the supporting shell, and the two ends of the first crankshaft are respectively located in the two square grooves of the guide frame. A rotating arm is fixedly connected to the middle part of the first crankshaft, and second torsion springs are respectively connected between the two ends of the first crankshaft and the two sides of the first guide sleeve, and the two second torsion springs are symmetrically arranged.

[0008] Optionally, a protrusion is provided at one end of the rotating arm away from the supporting shell.

[0009] Optionally, it also includes a limiting mechanism, which is arranged on the hook, and the limiting mechanism is used to limit the swing of the lifting ring, and the limiting mechanism includes a support sleeve, the two support sleeves are respectively fixedly connected to both sides of the middle part of the hook, the two support sleeves are symmetrically arranged, and the two support sleeves are rotatably connected to a rotating frame, and the two rotating frames are symmetrically arranged, and the two ends of each rotating frame are close to each other. There are two columnar structures on one side, and the two sides of the support shell are respectively fixedly connected to a second guide sleeve, the two second guide sleeves are symmetrically arranged, and the two second guide sleeves are slidably connected to a synchronous frame, and the two synchronous frames are symmetrically arranged, and a gasket is provided in the middle of the synchronous frame, and the ends of the two rotating frames close to each other are fixedly connected to the second crankshaft, and the two ends of the two second crankshafts are respectively provided with guide grooves, and the two ends of the bottom of the two synchronous frames are respectively slidably connected to the guide grooves on the same side of the two second crankshafts.

[0010] Optionally, a constraint mechanism is further included, the constraint mechanism is arranged on the rotating frame, the constraint mechanism is used to constrain the shaking of the hanging ring, the constraint mechanism includes a support frame, the four support frames are respectively fixedly connected to the two ends of the two rotating frames, the two support frames located on the same side of the two rotating frames are a group, the two support frames in each group are symmetrically arranged, the two groups of support frames are symmetrically arranged, the four support frames are slidably connected to the sliding frames, the tops of the two ends of the two rotating frames are fixedly connected to the support blocks, and the two support frames located on one side of the same group of support frames are The blocks form a group, the two support blocks in each group are symmetrically arranged, the two groups of support blocks are symmetrically arranged, the four support blocks are rotatably connected to the limit bars, the two limit bars on the same group of support blocks form a group, the two limit bars in each group are symmetrically arranged, the two groups of limit bars are symmetrically arranged, sliding grooves are opened at the ends of the two groups of limit bars close to each other, the sliding grooves of the four limit bars are respectively slidably connected to the tops of the four sliding frames, two third torsion springs are connected between the four limit bars and the four support blocks, and the two third torsion springs are symmetrically arranged.

[0011] Optionally, the bottom of the sliding frame is a plate-shaped structure.

[0012] Optionally, a pad block is further included, which is fixedly connected in the hook, and the top of the pad block is rotatably connected to two rotating bars, and the two rotating bars are symmetrically arranged, and the two rotating bars are respectively rotatably connected to the two sides of the pad block with two fourth torsion springs, and the two fourth torsion springs are symmetrically arranged.

[0013] Optionally, buffer pads are further included, and eight of the buffer pads are respectively connected to the bottom of the columnar structure of the rotating frame.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention buffers the moving speed of the hook through the slow flow rate of hydraulic oil, and then the hook can buffer the impact force generated by the sudden tightening of the sling, the rotating arm supports the hook tip of the hook so that the hook mouth of the hook is not easy to deform, and then the lifting ring is not easy to fall off from the hook mouth of the hook, and at the same time, the supporting shell will support the lifting frame through the first guide sleeve, and the lifting frame will pull the hook guard bar through the connecting frame, and then the hook guard bar cannot rotate into the hook mouth of the hook, so that the hook guard bar is more stable in the subsequent lifting process, thereby further enhancing the safety effect of the hook during the lifting operation.

[0015] 2. The downward movement of the hook will cause the two rotating frames to rotate downward, and then the columnar structures of the two rotating frames will contact the two sides of the cargo lifting ring through the buffer pads. When the hook moves to the bottom, the two synchronous frames will cause the two rotating frames to squeeze the cargo lifting ring from both sides, and then limit the cargo lifting ring through the two rotating frames, making the lifting ring more stable on the hook, thereby further enhancing the safety effect of the hook during lifting operations.

[0016] 3. When the two rotating frames rotate downward, the plate-like structures of the four sliding frames will press against the lifting ring and then stop moving. The four rotating bars continue to move so that the two rotating bars in each group rotate toward each other through the sliding frames. Then the two groups of rotating bars will press against the other two sides of the cargo lifting ring respectively, making it difficult for the lifting ring to swing on the hook, thereby further enhancing the safety effect of the hook during lifting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the locking mechanism of the present invention.

[0020] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged three-dimensional structure of A in the middle.

[0021] Figure 5 It is a partial three-dimensional structural schematic diagram of the locking mechanism of the present invention.

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the sealing mechanism of the present invention.

[0023] Figure 7 It is a schematic diagram of the split three-dimensional structure of the closing mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0025] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged three-dimensional structure of B in the figure.

[0026] Fig.10 It is a partial three-dimensional structural schematic diagram of the limiting mechanism of the present invention.

[0027] Fig.11 It is a partial three-dimensional structural schematic diagram of the limiting mechanism and the restraining mechanism of the present invention.

[0028] Fig.12 It is a schematic diagram of the three-dimensional structure of the restraining mechanism of the present invention.

[0029] Fig.13 It is a partial three-dimensional structural schematic diagram of the present invention.

[0030] Fig.14 It is a schematic diagram of the three-dimensional structure of the rotating bar of the present invention.

[0031] The meanings of the reference numerals in the figure are as follows: 1: connecting block, 2: supporting shell, 3: hook, 4: hook guard strip, 5: first torsion spring, 61: piston plate, 62: tension spring, 63: first guide sleeve, 64: lifting frame, 65: connecting frame, 71: guide frame, 72: rotating arm, 73: first crankshaft, 74: second torsion spring, 81: supporting sleeve, 82: rotating frame, 83: second guide sleeve, 84: synchronous frame, 85: second crankshaft, 91: supporting frame, 92: sliding frame, 93: supporting block, 94: limiting strip, 95: third torsion spring, 10: pad, 11: rotating strip, 12: fourth torsion spring, 13: buffer pad. DETAILED DESCRIPTION

[0032] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] Embodiment 1: A crane hook with high safety performance, such as Figure 1-Figure 14 As shown, it includes a connecting block 1, which is used to connect the crane sling, a supporting shell 2 is rotatably connected inside the connecting block 1, a cavity is opened inside the supporting shell 2, and the cavity of the supporting shell 2 is used to contain hydraulic oil, a hook 3 is slidably connected inside the supporting shell 2, a groove is opened at the hook tip of the hook 3, a hook guard strip 4 is rotatably connected to the middle of one side of the hook mouth of the hook 3, the hook guard strip 4 is used to close the hook mouth of the hook 3, the bottom of the hook guard strip 4 contacts with the hook tip of the hook 3, a closed loop is formed between the hook 3 and the hook guard strip 4, two first torsion springs 5 ​​are connected between the hook guard strip 4 and the hook 3, the two first torsion springs 5 ​​are symmetrically arranged, the hook 3 is provided with a locking mechanism for locking the hook guard strip 4, and the hook 3 is provided with a closing mechanism for shielding the hook mouth of the hook 3.

[0034] The locking mechanism includes a piston plate 61, which is connected to the top of the hook 3 by bolts, the outer side of the piston plate 61 is in contact with the inner wall of the cavity of the support shell 2, and two circulation holes are opened on the piston plate 61, and the circulation holes of the piston plate 61 are used for the circulation of hydraulic oil. A tension spring 62 is connected between the top of the hook 3 and the top inside the support shell 2, and a first guide sleeve 63 is connected to the side of the support shell 2 close to the hook guard strip 4 by bolts, and a lifting frame 64 is slidably connected in the first guide sleeve 63, and a sliding groove is opened at the bottom of the lifting frame 64. The first guide sleeve 63 is used to resist the lifting frame 64, and a connecting frame 65 is welded on the top of the hook guard strip 4, and the connecting frame 65 is slidably connected to the sliding groove of the lifting frame 64.

[0035] The closing mechanism includes a guide frame 71, which is connected to one side of the middle part of the hook 3 by bolts. Two square grooves are opened on the side of the guide frame 71 away from the support shell 2. The first guide sleeve 63 is rotatably connected to the side of the support shell 2 away from the first crankshaft 73. The two ends of the first crankshaft 73 are respectively located in the two square grooves of the guide frame 71. The middle part of the first crankshaft 73 is connected to a rotating arm 72 through a key groove. The square groove of the support shell 2 is used to drive the rotating arm 72 to rotate through the first crankshaft 73. Second torsion springs 74 are connected between the two ends of the first crankshaft 73 and the two sides of the first guide sleeve 63, and the two second torsion springs 74 are symmetrically arranged.

[0036] A protrusion is provided at one end of the rotating arm 72 away from the supporting shell 2 , and the protrusion of the rotating arm 72 is used to be inserted into the groove of the hook 3 .

[0037] Initially, the support shell 2 is filled with hydraulic oil, and the square groove of the guide frame 71 pulls the first crankshaft 73, so that the second torsion spring 74 is in a twisted state. First, the operator installs the connecting block 1 on the sling of the crane, and then the operator hangs the lifting ring of the cargo on the hook 3. At the same time, the bottom of the hook guard strip 4 is against the hook tip of the hook 3 through the torsion of the first torsion spring 5, thereby blocking the hook mouth of the hook 3, so that the lifting ring is not easy to slip off from the hook mouth of the hook 3. Then the operator controls the crane to drive the support shell 2 to move upward through the connecting block 1. The weight of the cargo itself will pull the hook 3 downward through the lifting ring. The downward movement of the hook 3 will drive the piston plate 61 to move downward to squeeze the hydraulic oil at the bottom. The squeezed liquid The pressurized oil will slowly enter the upper part of the piston plate 61 through the two flow holes of the piston plate 61, and the tension spring 62 will be stretched. In this way, the moving speed of the hook 3 is buffered by the slow flow rate of the hydraulic oil, and then the impact force caused by the sudden tightening of the sling can be buffered by the hook 3. When the support shell 2 moves upward, it will drive the rotating arm 72 to move upward through the first guide sleeve 63, so that the guide frame 71 no longer pulls the rotating arm 72 through the first crankshaft 73. The reset of the second torsion spring 74 will drive the rotating arm 72 to rotate downward through the first crankshaft 73. After the support shell 2 moves upward for a certain distance, the bottom of the cavity of the support shell 2 will resist the hook 3, and at the same time, the protrusion of the rotating arm 72 will be stuck in the groove of the hook tip of the hook 3, and the square groove of the guide frame 71 will By squeezing the first crankshaft 73, the rotating arm 72 cannot rotate in the direction away from the hook 3. In this way, the hook tip of the hook 3 is supported by the rotating arm 72, so that the hook mouth of the hook 3 is not easily deformed, and the lifting ring is not easily separated from the hook mouth of the hook 3, which makes the subsequent lifting process more stable, thereby enhancing the safety effect of the hook 3 during the lifting operation; at the same time, the support shell 2 will press against the top of the lifting frame 64 through the first guide sleeve 63, and the lifting frame 64 will pull the hook guard bar 4 through the connecting frame 65, so that the hook guard bar 4 cannot rotate into the hook mouth of the hook 3, thereby making the hook guard bar 4 more stable in the subsequent lifting process, thereby further enhancing the safety effect of the hook 3 during the lifting operation; then the support shell 2 continues to move upward to drive the hook 3 The hook 3 moves upward, and the upward movement will lift the cargo through the lifting ring. When the cargo is lifted to the target position, the operator controls the crane to lower the cargo. After the cargo touches the ground, it no longer pulls the hook 3 by its own weight. The resetting of the tension spring 62 will drive the hook 3 and the piston plate 61 to reset. The resetting of the hook 3 will drive the guide frame 71 to move upward, so that the guide frame 71 will resist the first crankshaft 73 again, so that the rotating arm 72 and the torsion spring return to the initial state. At the same time, the resetting of the hook 3 will drive the lifting frame 64 to move upward through the protective hook strip 4 and the connecting frame 65, so that the first guide sleeve 63 no longer resists the lifting frame 64, so that the protective hook strip 4 can rotate into the hook mouth of the hook 3, and then the operator removes the cargo lifting ring from the hook 3.

[0038] Embodiment 2: Based on embodiment 1, Figure 1-Figure 12 As shown, it also includes a limiting mechanism, which is arranged on the hook 3 and is used to limit the swing of the lifting ring. The limiting mechanism includes a support sleeve 81, and the two support sleeves 81 are respectively welded on both sides of the middle part of the hook 3, and the two support sleeves 81 are symmetrically arranged. The two support sleeves 81 are rotatably connected to a rotating frame 82, and the two rotating frames 82 are symmetrically arranged. The two ends of each rotating frame 82 are close to each other on one side, which is two columnar structures. The columnar structure of the rotating frame 82 is used to better squeeze the lifting ring. The two sides of the support shell 2 are respectively connected with a second guide sleeve 83 by bolts. The two second guide sleeves 83 are symmetrically arranged, and a synchronous frame 84 is slidably connected to the two second guide sleeves 83. The second guide sleeve 83 is used to drive the rotating frame 82 to rotate through the synchronous frame 84. The two synchronous frames 84 are symmetrically arranged, and a gasket is provided in the middle of the synchronous frame 84. The gasket of the synchronous frame 84 is used to resist the synchronous frame 84. The ends of the two rotating frames 82 close to each other are connected with a second crankshaft 85 by bolts, and the two ends of the two second crankshafts 85 are respectively provided with guide grooves, and the two ends of the bottom of the two synchronous frames 84 are respectively slidably connected to the guide grooves on the same side of the two second crankshafts 85.

[0039] It also includes a constraint mechanism, which is arranged on the rotating frame 82, and the constraint mechanism is used to constrain the shaking of the hanging ring. The constraint mechanism includes a support frame 91, and the four support frames 91 are respectively connected to the two ends of the two rotating frames 82 by bolts, and the two support frames 91 located on the same side of the two rotating frames 82 are a group, and the two support frames 91 in each group are symmetrically arranged. The two groups of support frames 91 are symmetrically arranged, and the four support frames 91 are slidably connected with sliding frames 92, and the tops of the two ends of the two rotating frames 82 are connected with support blocks 93 by bolts, and the two support blocks 93 located on one side of the same group of support frames 91 are a group, and the two support blocks 93 in each group are opposite The two groups of support blocks 93 are symmetrically arranged, and the four support blocks 93 are rotatably connected with limit strips 94. The sliding frame 92 is used to squeeze the limit strips 94 to rotate. The two limit strips 94 on the same group of support blocks 93 form a group, and the two limit strips 94 in each group are symmetrically arranged. The two groups of limit strips 94 are symmetrically arranged, and a sliding groove is opened at one end of the two groups of limit strips 94 close to each other. The limit strips 94 are used to stabilize the lifting ring, and the sliding grooves of the four limit strips 94 are respectively slidably connected to the top of the four sliding frames 92, and two third torsion springs 95 are connected between the four limit strips 94 and the four support blocks 93, and the two third torsion springs 95 are symmetrically arranged.

[0040] The bottom of the sliding frame 92 is a plate-like structure, and the plate-like structure of the sliding frame 92 is used for better contact with the lifting ring.

[0041] It also includes buffer pads 13. Eight buffer pads 13 are respectively connected to the bottom of the columnar structure of the rotating frame 82. The buffer pads 13 are used to reduce the wear of the columnar structure of the rotating frame 82 on the hanging ring.

[0042] Initially, the support shell 2 presses against the gasket of the synchronous frame 84 through the two second guide sleeves 83, so that the two synchronous frames 84 press against the guide grooves at both ends of the two second crankshafts 85, so that the two rotating frames 82 are in a lifted state. When the hook 3 moves downward, the hook 3 drives the two rotating frames 82 and the two second crankshafts 85 to move downward together through the two support sleeves 81. The two second crankshafts 85 move downward and no longer press against the two synchronous frames 84, so that the two rotating frames 82 gradually rotate downward by their own weight. Subsequently, the columnar structures of the two rotating frames 82 contact the two sides of the cargo lifting ring through the buffer pads 13, and when the hook 3 moves to the bottom When the two rotating frames 82 are moved downward, the two second guide sleeves 83 will squeeze the tops of the two synchronous frames 84 respectively, so that the two synchronous frames 84 will respectively pull the two rotating frames 82 through the two ends of the two second crankshafts 85 to squeeze the lifting rings of the goods from both sides, thereby limiting the lifting rings of the goods through the two rotating frames 82, thereby making the lifting rings more stable on the hook 3, thereby further enhancing the safety effect of the hook 3 during the lifting operation; when the two rotating frames 82 rotate downward, the two rotating frames 82 will drive the four supporting frames 91, the four sliding frames 92, the four supporting blocks 93 and the four limiting bars 94 to move together, and then the plate-like structures of the four sliding frames 92 will resist The four sliding frames 92 will stop moving after they press against the lifting ring, and at the same time, the four sliding frames 92 will respectively press against the sliding grooves of the four rotating bars 11, and the two rotating frames 82 will drive the four rotating bars 11 to continue to move through the four supporting blocks 93, so that the two rotating bars 11 of each group will rotate toward each other through the sliding frames 92, and the third torsion spring 95 will be twisted, and then the two groups of rotating bars 11 will respectively press against the other two sides of the cargo lifting ring, so that the lifting ring is not easy to swing on the hook 3, thereby further enhancing the safety effect of the hook 3 during the lifting operation; when the hook 3 is reset, the two rotating frames 82 will be driven to move upward through the two supporting sleeves 81 The two rotating frames 82 move upward and drive the two synchronous frames 84 to move upward through the two second crankshafts 85. Then, the two second guide sleeves 83 respectively press against the gaskets of the two synchronous frames 84, so that the two synchronous frames 84 no longer move, so that the two second crankshafts 85 respectively drive the two rotating frames 82 to rotate upward through the two synchronous frames 84 for reset. At the same time, the reset of the rotating frame 82 makes the four sliding frames 92 no longer press against the lifting ring, so that the four sliding frames 92 no longer press against the four rotating bars 11. The reset of the third torsion spring 95 will respectively drive the four rotating bars 11 to reset, and the reset of the four rotating bars 11 will respectively drive the four sliding frames 92 to reset.

[0043] Embodiment 3: Based on embodiment 2, Figure 1-Figure 14 As shown, it also includes a cushion block 10, which is connected to the hook 3 by bolts. The cushion block 10 is used to support the lifting ring. The top of the cushion block 10 is rotatably connected to two rotating bars 11, and the two rotating bars 11 are symmetrically arranged. The rotating bars 11 are used to limit the top of the lifting ring, and the two rotating bars 11 are rotatably connected to the two sides of the cushion block 10 respectively. There are two fourth torsion springs 12, and the two fourth torsion springs 12 are symmetrically arranged.

[0044] When the operator hangs the lifting ring on the hook 3, the lifting ring will squeeze the tails of the two rotating bars 11 so that the two rotating bars 11 rotate towards each other, and the fourth torsion spring 12 is twisted. Then the two rotating bars 11 will jointly limit the top of the lifting ring. At the same time, the hook 3 will support the lifting ring through the pad 10, thereby reducing the friction between the cargo lifting ring and the hook 3, and making it difficult for the lifting ring to move on the hook 3, thereby further enhancing the safety effect of the hook 3 during lifting operations; when the lifting ring is removed, the fourth torsion spring 12 is reset to drive the two rotating bars 11 to reset.

[0045] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application.

Claims

1. A crane hook with high safety performance, characterized by: The invention comprises a connecting block (1), wherein a supporting shell (2) is rotatably connected to the connecting block (1), a cavity is formed inside the supporting shell (2), a hook (3) is slidably connected to the supporting shell (2), a groove is formed at the hook tip of the hook (3), a hook guard strip (4) is rotatably connected to the middle of one side of the hook mouth of the hook (3), the bottom of the hook guard strip (4) contacts the hook tip of the hook (3), a closed loop is formed between the hook (3) and the hook guard strip (4), two first torsion springs (5) are connected between the hook guard strip (4) and the hook (3), the two first torsion springs (5) are symmetrically arranged, a locking mechanism for locking the hook guard strip (4) is provided on the hook (3), and a closing mechanism for shielding the hook mouth of the hook (3) is provided on the hook (3); The locking mechanism comprises a piston plate (61), the piston plate (61) being fixedly connected to the top of the hook (3), the outer side of the piston plate (61) being in contact with the inner wall of the cavity of the support shell (2), the piston plate (61) being provided with two flow holes, a tension spring (62) being connected between the top of the hook (3) and the top inside the support shell (2), a first guide sleeve (63) being fixedly connected to a side of the support shell (2) close to the hook guard strip (4), a lifting frame (64) being slidably connected inside the first guide sleeve (63), a sliding groove being provided at the bottom of the lifting frame (64), a connecting frame (65) being fixedly connected to the top of the hook guard strip (4), and the connecting frame (65) being slidably connected to the sliding groove of the lifting frame (64).

2. A crane hook with high safety performance according to claim 1, characterized in that: The closing mechanism comprises a guide frame (71), wherein the guide frame (71) is fixedly connected to one side of the middle of the hook (3), and two square grooves are formed on the side of the guide frame (71) away from the support shell (2). A first crankshaft (73) is rotatably connected to the side of the first guide sleeve (63) away from the support shell (2), and two ends of the first crankshaft (73) are respectively located in the two square grooves of the guide frame (71). A rotating arm (72) is fixedly connected to the middle of the first crankshaft (73), and second torsion springs (74) are respectively connected between the two ends of the first crankshaft (73) and the two sides of the first guide sleeve (63), and the two second torsion springs (74) are symmetrically arranged.

3. A crane hook with high safety performance according to claim 2, characterized in that: A protrusion is provided at one end of the rotating arm (72) away from the supporting shell (2).

4. A crane hook with high safety performance according to claim 2, characterized in that: The invention also comprises a limiting mechanism, wherein the limiting mechanism is arranged on the hook (3), and the limiting mechanism is used to limit the swing of the lifting ring, and the limiting mechanism comprises a supporting sleeve (81), and the two supporting sleeves (81) are respectively fixedly connected to the two sides of the middle part of the hook (3), and the two supporting sleeves (81) are symmetrically arranged, and the two supporting sleeves (81) are both rotatably connected to a rotating frame (82), and the two rotating frames (82) are symmetrically arranged, and the two ends of each rotating frame (82) are close to each other on one side and are two columnar structures, and the two sides of the supporting shell (2) are respectively The two rotating frames (82) are fixedly connected to the rotating frames (82), the two second guide sleeves (83) are symmetrically arranged, the two second guide sleeves (83) are slidably connected to a synchronous frame (84), the two synchronous frames (84) are symmetrically arranged, a gasket is provided in the middle of the synchronous frame (84), the two ends of the two rotating frames (82) close to each other are fixedly connected to a second crankshaft (85), the two ends of the two second crankshafts (85) are respectively provided with a guide groove, and the two ends of the bottom of the two synchronous frames (84) are respectively slidably connected to the guide grooves on the same side of the two second crankshafts (85).

5. A crane hook with high safety performance according to claim 4, characterized in that: The device also includes a restraining mechanism, which is arranged on the rotating frame (82) and is used to restrain the swing of the hanging ring. The restraining mechanism includes a support frame (91). The four support frames (91) are respectively fixedly connected to the two ends of the two rotating frames (82). The two support frames (91) located on the same side of the two rotating frames (82) form a group. The two support frames (91) in each group are symmetrically arranged. The two groups of support frames (91) are symmetrically arranged. The four support frames (91) are all slidably connected to the sliding frames (92). The tops of the two ends of the two rotating frames (82) are fixedly connected to support blocks (93). The two support blocks (93) located on one side of the same group of support frames (91) form a group. The two support blocks (93) of each group are symmetrically arranged, the two groups of support blocks (93) are symmetrically arranged, the four support blocks (93) are rotatably connected to the limit bars (94), the two limit bars (94) on the same group of support blocks (93) form a group, the two limit bars (94) of each group are symmetrically arranged, the two groups of limit bars (94) are symmetrically arranged, the two groups of limit bars (94) have sliding grooves at their ends close to each other, the sliding grooves of the four limit bars (94) are respectively slidably connected to the tops of the four sliding frames (92), the four limit bars (94) are respectively connected to the four support blocks (93) with two third torsion springs (95), and the two third torsion springs (95) are symmetrically arranged.

6. A crane hook with high safety performance according to claim 5, characterized in that: The bottom of the sliding frame (92) is a plate-shaped structure.

7. A crane hook with high safety performance according to claim 5, characterized in that: It also includes a cushion block (10), the cushion block (10) being fixedly connected in the hook (3), the cushion block (10) having two rotating bars (11) rotatably connected to the top, the two rotating bars (11) being symmetrically arranged, and two fourth torsion springs (12) being rotatably connected between the two rotating bars (11) and the two sides of the cushion block (10), respectively, the two fourth torsion springs (12) being symmetrically arranged.

8. A crane hook with high safety performance according to claim 7, characterized in that: It also includes a buffer pad (13), wherein eight buffer pads (13) are respectively connected to the bottom of the columnar structure of the rotating frame (82).

Images