Anti-unhooking lifting hook

Abstract

The invention discloses an anti-unhooking lifting hook, which comprises: a lifting hook body, which comprises a hook member and a connecting member, the hook member is provided with a root portion and a tail portion, and the tail portion is connected to the connecting member; the locking piece comprises a locking arm and a driving arm, the locking arm is obliquely arranged in a hook opening of the hook piece, and the upper end of the locking arm is installed on the connecting piece in a turnover mode through a hinge shaft; one end of the driving arm is connected to the upper end of the blocking arm at an angle, so that the gravity of the driving arm is utilized to drive the blocking arm to turn upwards, and the lower end of the blocking arm abuts against the inner side of the tail part; and the retaining part is detachably mounted on the driving arm, and the retaining part abuts against the inner side of the root part so as to prevent the locking arm from reversely overturning. The problem that a locking plate of an existing lifting hook is easily touched by mistake and the lifting hook is opened in the lifting process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hooks, and particularly to an anti-disengagement hook. Background Art

[0002] At present, the common hook a on the market (as Figure 1 shown) mainly fixes the sling through the locking plate b thereon. The original design intention of the locking plate b is to prevent the sling from accidentally falling off the hook a during the hoisting process.

[0003] However, in the actual use process, most of the existing locking plates b lack the locking function and only rely on their gravity or the friction force between the shape and material and the hook to keep the closed state. Under the collision or vibration of external forces, the locking plate is prone to automatically open due to uneven force or insufficient friction force. Once the locking plate opens, the sling hanging on the hook may fall off accordingly, thus triggering serious safety accidents. Summary of the Invention

[0004] In order to overcome the defects existing in the prior art, the present invention provides an anti-disengagement hook to solve the problem that the locking plate of the existing hook is easily accidentally touched and opened during the hoisting process.

[0005] To achieve the above object, an anti-disengagement hook is provided, including:

[0006] A hook body, including a hook member and a connecting member, the hook member has a root portion and a tail portion, and the tail portion is connected to the connecting member;

[0007] A locking member, including a locking arm and a driving arm, the locking arm is obliquely arranged in the hook opening of the hook member, the upper end of the locking arm is pivotally mounted on the connecting member through a hinge shaft, and one end of the driving arm is angularly connected to the upper end of the locking arm to drive the locking arm to turn upwards by the gravity of the driving arm so that the lower end of the locking arm abuts against the inner side of the tail portion;

[0008] A backstop member, detachably mounted on the driving arm, the backstop member abuts against the inner side of the root portion to prevent the locking arm from reversing.

[0009] Further, the hinge shaft is arranged in the same direction as the axis of the hook member.

[0010] Further, the opposite ends of the hinge shaft are respectively connected with the locking arms, the lower ends of the two locking arms are connected with a pressing rod, the pressing rod abuts against the inner side of the tail portion, and the driving arms on the two locking arms are respectively arranged on the opposite sides of the hook member.

[0011] Further, the driving arm has a relatively large head end and a small head end. The upper part of the large head end of the driving arm is connected to the upper end of the blocking arm, and the anti-retreat member is detachably mounted on the lower part of the large head end of the driving arm.

[0012] Further, sleeves are respectively mounted on the lower part of the large head end of the driving arm, and the anti-retreat member is detachably inserted into the sleeves on the two driving arms.

[0013] Further, a hole passage is formed at one end of the anti-retreat member. The hole passage is arranged along the length direction of the anti-retreat member. A sliding rod is elastically mounted in the hole passage. An avoidance hole is formed on the outer wall of the sliding rod. The anti-retreat member is provided with a through hole. One end of the through hole communicates with the hole passage. A locking hole is formed on the inner wall of a sleeve. The other end of the through hole is aligned with the locking hole. The aperture of the through hole gradually decreases from one end of the through hole to the other end. A locking ball is movably accommodated in the through hole. One side of the locking ball extends to the outside of the other end of the through hole and is inserted into the locking hole to lock the sleeve, and the other side of the locking ball abuts against the outer wall of the sliding rod.

[0014] Further, a support spring is connected between one end of the sliding rod and the bottom of the hole of the hole passage.

[0015] Further, the other end of the sliding rod extends to the outside of the hole passage.

[0016] The beneficial effect of the present invention is that for the anti-disengagement hook of the present invention, when the locking member is collided or vibrated by an external force, it will not flip to open the hook opening of the hook, thereby avoiding the falling off of the sling on the hook and improving the safety of the hoisting construction.

[0017] The locking member of the anti-disengagement hook of the present invention locks the hook opening of the hook body more stably and reliably. Even in a complex or harsh hoisting environment, it can effectively prevent the suspended object from falling off. The operation of the locking member is simple and convenient. The locking and unlocking operations can be completed only by inserting and removing the anti-retreat member, without complex operation steps and additional tools, improving the safety and reliability of the entire hook anti-falling insurance device and reducing the risk of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more obvious:

[0019] Figure 1 It is a schematic structural diagram of a hook in the prior art.

[0020] Figure 2 It is a schematic structural diagram of the anti-disengagement hook according to an embodiment of the present invention.

[0021] Figure 3 This is a cross-sectional view of the anti-reverse member of the embodiment of the present invention. Detailed implementation manners

[0022] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0024] Refer to Figure 2 and Figure 3 As shown, the present invention provides an anti-disengagement hook, including: a hook body 1, a locking member 2, and an anti-reverse member 3.

[0025] Among them, the hook body 1 includes a hook member 11 and a connecting member 12.

[0026] In this embodiment, the hook member is in a similar U shape. Specifically, the hook member 11 has a root portion and a tail portion. The tail portion is connected to the connecting member 12. The connecting member is connected to the boom of the hoisting machinery.

[0027] The locking member 2 includes a blocking arm 21 and a driving arm 22. In this embodiment, the locking member is in an inverted V shape as a whole.

[0028] Specifically, the blocking arm 21 is inclined and arranged in the hook opening of the hook member 11. The upper end of the blocking arm 21 is pivotally mounted on the connecting member 12 through a hinge shaft 24. One end of the driving arm 22 is angularly connected to the upper end of the blocking arm 21 to drive the blocking arm 21 to turn upward by the gravity of the driving arm 22 so that the lower end of the blocking arm 21 abuts against the inner side of the tail portion.

[0029] Driven by the self-gravity of the driving arm, the lower end of the blocking arm turns upward and abuts against the inner side of the tail portion of the hook member, so that the blocking arm closes the hook opening of the hook member.

[0030] The anti-reverse member 3 is detachably mounted on the driving arm 22. The anti-reverse member 3 abuts against the inner side of the root portion to prevent the blocking arm 21 from reversing.

[0031] Continuing to refer to Figure 2 As shown, in this embodiment, a first bushing is mounted on the side of the connecting portion facing the tail portion of the hook member. The hinge shaft is rotatably inserted through the first bushing. The hinge shaft 24 is arranged in the same direction as the axis of the hook member 11.

[0032] At opposite ends of the hinge shaft 24, there are respectively connected locking arms 21. In this embodiment, the upper end of the locking arm is connected to the upper end of the driving arm through a second bushing. The second bushing is rotatably sleeved on the hinge shaft. At both ends of the hinge shaft, there are respectively sleeved second bushings. The lower ends of the two locking arms 21 are connected with a pressing rod 23. The pressing rod 23 abuts against the inner side of the tail. The driving arms 22 on the two locking arms 21 are respectively arranged on opposite sides of the hook member 11.

[0033] As a preferred embodiment, the driving arm 22 has a relatively large head end and a small head end. The upper part of the large head end of the driving arm 22 is connected to the upper end of the locking arm 21. The anti-retreat member 3 is detachably installed at the lower part of the large head end of the driving arm 22.

[0034] In this embodiment, sleeves 25 are respectively installed at the lower parts of the large head ends of the driving arms 22. The anti-retreat member 3 is detachably inserted into the sleeves 25 on the two driving arms 22.

[0035] Combined with Figure 3 As shown, one end of the anti-retreat member 3 is formed with a hole passage. The bottom of the hole passage extends to the other end of the anti-retreat member, but the bottom of the hole does not penetrate the end face of the other end of the anti-retreat member. The hole passage is arranged along the length direction of the anti-retreat member 3. A sliding rod 31 is elastically installed in the hole passage. An avoidance hole is formed on the outer wall of the sliding rod 31. The anti-retreat member 3 is provided with a through hole. One end of the through hole communicates with the hole passage, and a locking hole is formed on the inner wall of a sleeve 25. The other end of the through hole is aligned with the locking hole. The aperture of the through hole gradually decreases from one end of the through hole to the other end. A locking ball 32 is movably accommodated in the through hole. One side of the locking ball 32 extends to the outside of the other end of the through hole and is inserted into the locking hole to lock a sleeve 25. The other side of the locking ball 32 abuts against the outer wall of the sliding rod 31.

[0036] As a preferred embodiment, a support spring 33 is connected between one end of the sliding rod 31 and the bottom of the hole passage.

[0037] In this embodiment, the other end of the sliding rod 31 extends to the outside of the hole passage. When it is necessary to disassemble the anti-retreat member, press the sliding rod in the direction of the bottom of the hole so that the avoidance hole on the sliding rod is aligned with the other side of the locking ball. At this time, pull out the anti-retreat member from a sleeve. Correspondingly, one side of the locking ball retracts into the through hole, and at the same time, the other side of the locking ball is inserted into the avoidance hole of the sliding rod. After the anti-retreat member is withdrawn from a sleeve, release the sliding rod. The sliding rod abuts against the locking ball, so that the other side of the locking ball retracts into the through hole again, and then one side of the locking ball extends to the outside of the through hole, so that the sliding rod cannot slip out of the other sleeve, avoiding the sliding rod from falling and being lost, but still ensuring that the locking member can rotate.

[0038] As a preferred embodiment, the sleeve is a bearing. To facilitate the rotation and force relief when the self-locking pin is impacted under special circumstances, the use of a bearing for the sleeve enables it to rotate and relieve force when subjected to external impact, preventing the anti-retreat component from being damaged or failing due to excessive impact force, thereby enhancing the safety of the hook anti-drop insurance device.

[0039] For the anti-drop hook of the present invention, under the collision or vibration of external force on the locking component, it will not flip to open the hook mouth of the hook, thereby preventing the sling on the hook from falling off and enhancing the safety of the hoisting construction.

[0040] The locking component of the anti-drop hook of the present invention locks the hook mouth of the hook body more stably and reliably. Even in complex or harsh hoisting environments, it can effectively prevent the lifted object from falling off. The operation of the locking component is simple and convenient. The locking and unlocking operations can be completed only by inserting and removing the anti-retreat component, without complex operation steps and additional tools, enhancing the safety and reliability of the entire hook anti-drop insurance device and reducing the risk of safety accidents.

[0041] The above description is only the preferred embodiments of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An anti-unhooking hook, characterized in that: include: The hook body comprises a hook member and a connecting member, wherein the hook member has a root portion and a tail portion, and the tail portion is connected to the connecting member; The locking member comprises a blocking arm and a driving arm, wherein the blocking arm is obliquely arranged in the hook opening of the hook member, the upper end of the blocking arm is flipably mounted on the connecting member via a hinge shaft, and one end of the driving arm is connected to the upper end of the blocking arm at an angle so as to utilize the gravity of the driving arm to drive the blocking arm to flip upward so that the lower end of the blocking arm abuts against the inner side of the tail; A stopper is detachably mounted on the driving arm, and the stopper abuts against the inner side of the root to prevent the blocking arm from flipping over in the opposite direction.

2. The anti-unhooking hook according to claim 1, characterized in that: The hinge shaft and the axis of the hook member are arranged in the same direction.

3. The anti-unhooking hook according to claim 2, characterized in that: The opposite ends of the hinge shaft are respectively connected to the blocking arms, the lower ends of the two blocking arms are connected to the pressing rods, the pressing rods are pressed against the inner side of the tail, and the driving arms on the two blocking arms are respectively arranged on the opposite sides of the hook member.

4. The anti-unhooking hook according to claim 3, characterized in that: The driving arm has a relatively large head end and a small head end, the upper part of the large head end of the driving arm is connected to the upper end of the blocking arm, and the stop member is detachably mounted on the lower part of the large head end of the driving arm.

5. The anti-unhooking hook according to claim 4, characterized in that: The lower parts of the big ends of the driving arms are respectively provided with sleeves, and the stoppers are detachably inserted into the sleeves on the two driving arms.

6. The anti-unhooking hook according to claim 5, characterized in that: A channel is formed at one end of the stop member, and the channel is arranged along the length direction of the stop member, a sliding rod is elastically installed in the channel, an avoidance hole is formed on the outer wall of the sliding rod, and a through hole is formed on the stop member, one end of the through hole is connected to the channel, a locking hole is formed on the inner wall of a sleeve, and the other end of the through hole is aligned with the locking hole, and the aperture of the through hole gradually decreases from one end of the through hole to the other end of the through hole, and a locking ball is movably accommodated in the through hole, one side of the locking ball extends to the outside of the other end of the through hole and is inserted into the locking hole to lock the sleeve, and the other side of the locking ball abuts against the outer wall of the sliding rod.

7. The anti-unhooking hook according to claim 6, characterized in that: A supporting spring is connected between one end of the sliding rod and the bottom of the hole.

8. The anti-unhooking hook according to claim 7, characterized in that: The other end of the slide rod extends to the outside of the hole.

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