Gravity type quick release hook with labor-saving reset function

Abstract

The gravity type quick release hook with the labor-saving reset function comprises a lifting lug plate, and a hole is formed in the lifting lug plate; the lifting lug plate is connected with two pulling plates through lifting lug shafts, the bottom ends of the pulling plates are connected with hook bodies through hook body shafts, and the lifting lug plate and the hook bodies are located between the two pulling plates; the gravity center of the hook body is located above the hook body shaft, the gravity center of the hook body is not collinear with the connecting line between the lifting lug shaft and the hook body shaft, and a hook opening of the hook body faces the gravity center side of the hook body. A blind hole is formed in the top of the hook body, and a first limiting piece is installed in the blind hole. A second limiting piece is rotationally connected between the two pulling plates, the top end of the second limiting piece is connected with one end of a reset tension spring, and the other end of the reset tension spring is fixedly connected with the two pulling plates through pin shafts. Through the arrangement of the resistance rod, the resistance for entering a self-unhooking state from a reset state is increased by utilizing the lever principle, and the hooking reliability and the manual intervention frequency are ensured; and through the arrangement of the spring bolt limiting mechanism, the manual operation intensity in the resetting process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, and particularly relates to a gravity quick-release hook with a labor-saving reset function. Background Art

[0002] During hoisting operations, after the object to be lifted is in place, it is necessary to disconnect the sling from the object to be lifted, which is often completed manually at this time. When the object to be lifted is in dangerous environments such as high altitude, deep water, narrow spaces, etc., the difficulty coefficient and danger coefficient of manual operation are high.

[0003] In the prior art, a gravity quick-release hook is often used to achieve the quick hook disconnection operation process. The gravity quick-release hook has the function of quickly disengaging from the lower object to be lifted by relying on the self-gravity of the hook during the process from the loaded state to the unloaded state. However, manual intervention is required during hanging to keep the gravity quick-release hook and the object to be hooked in a good hanging state.

[0004] Therefore, there is an urgent need to provide a gravity quick-release hook with a labor-saving reset function to reduce the frequency of manual operation and intervention during hanging, thereby solving the problems existing in the above prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a gravity quick-release hook with a labor-saving reset function to solve the problems existing in the above prior art.

[0006] To achieve the above purpose, the present invention provides a gravity quick-release hook with a labor-saving reset function, including a lifting lug plate. A hole for connecting with a hoisting tackle is provided on the lifting lug plate; the lifting lug plate is connected with two pulling plates through a lifting lug shaft. The bottom end of the pulling plate is connected with a hook body through a hook body shaft. The lifting lug plate and the hook body are both located between the two pulling plates;

[0007] The center of gravity of the hook body is located above the hook body shaft, and the center of gravity of the hook body is not collinear with the line connecting the lifting lug shaft and the hook body shaft. The hook mouth of the hook body faces the side of the center of gravity of the hook body;

[0008] A blind hole is provided at the top of the hook body, and a first limiting member is installed in the blind hole; a second limiting member is rotatably connected between the two pulling plates. One end of a reset tension spring is connected to the top end of the second limiting member, and the other end of the reset tension spring is fixedly connected to the two pulling plates through a pin shaft;

[0009] When the hook body is in the reset state, the bottom end of the second limiting member is in limit cooperation with the first limiting member, and the center of the hook cavity of the hook body is not collinear with the line connecting the lifting lug shaft and the hook body shaft.

[0010] Preferably, the second limiting member includes a resistance rod, which is rotatably connected between the two pulling plates through a resistance rod shaft, and the reset tension spring is connected to the top end of the resistance rod; a second locking tongue is arranged at the bottom end of the resistance rod, and the second locking tongue is in limiting cooperation with the first limiting member.

[0011] Preferably, the first limiting member includes a first locking tongue slidably arranged in the blind hole, and the second locking tongue is in limiting cooperation with the first locking tongue; one end of a locking tongue compression spring is fixedly connected in the blind hole, and the other end of the locking tongue compression spring is fixedly connected to the first locking tongue.

[0012] Preferably, the top surface of the first locking tongue and the bottom surface of the second locking tongue are both inclined surfaces, and the two inclined surfaces are arranged oppositely; the orientation of the inclined surface of the first locking tongue is opposite to the orientation of the hook opening of the hook body, and the orientation of the inclined surface of the second locking tongue is opposite to the orientation of the inclined surface of the first locking tongue.

[0013] Preferably, the lower cross-section of the first locking tongue is circular, and the upper cross-section of the first locking tongue is rectangular; a locking tongue pressing plate is fixedly connected to the hook body, a rectangular hole is formed in the middle of the locking tongue pressing plate, the rectangular section of the first locking tongue is limited and slidably sleeved in the rectangular hole, and the circular section of the first locking tongue is in limiting cooperation with the locking tongue pressing plate.

[0014] Preferably, the length of the resistance rod above the resistance rod shaft is greater than the length of the resistance rod below the resistance rod shaft.

[0015] Preferably, a limiting block is connected between the two pulling plates through a pin shaft, and both ends of the limiting block are in contact with the two pulling plates respectively; the top of the resistance rod is in limiting cooperation with the limiting block, and both the limiting block and the reset tension spring are located on the same side of the resistance rod.

[0016] Preferably, the limiting block is of a rectangular structure, and one vertical surface of the limiting block is in contact with one side surface of the resistance rod.

[0017] Preferably, pressing components are arranged on the opposite sides of the two pulling plates, and the pressing components are in contact with the resistance rod.

[0018] Preferably, the pressing component includes a threaded sleeve fixedly connected to the pulling plate, a light hole is formed in the pulling plate, and the threaded sleeve is arranged corresponding to the light hole; a ball, a ball compression spring and an adjusting stud are sequentially installed in the threaded sleeve, the adjusting stud is threadedly connected to the end of the threaded sleeve away from the pulling plate, and both ends of the ball compression spring are in contact with the ball and the adjusting stud respectively; tapered blind holes are arranged on both sides of the resistance rod, and the tapered blind holes are arranged corresponding to the light holes;

[0019] When the resistance rod is in the reset state, the ball is pushed into the conical blind hole by the ball compression spring.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] The gravity quick-release hook with a labor-saving reset function provided by the present invention, through the setting of the resistance rod, utilizes the lever principle to increase the resistance from the reset state to the self-unhooking state, ensuring the hanging reliability and the frequency of manual intervention. Through the setting of the lock tongue limiting mechanism, the manual operation intensity during the reset process is reduced. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of the gravity quick-release hook of the present invention in the reset state;

[0024] Figure 2 Left view of the gravity quick-release hook of the present invention in the reset state;

[0025] Figure 3 Schematic diagram of the gravity quick-release hook of the present invention in the load-bearing self-unhooking state;

[0026] Figure 4 Schematic diagram of the gravity quick-release hook of the present invention in the unhooking state;

[0027] In the figure: 1, lifting lug plate; 2, lifting lug shaft; 3, pull plate; 4, hook body shaft; 5, hook body; 6, reset tension spring; 7, limit block; 8, resistance rod; 9, resistance rod shaft; 10, lock tongue pressing plate; 11, first lock tongue; 12, lock tongue compression spring; 13, threaded sleeve; 14, adjusting stud; 15, ball compression spring; 16, ball. Detailed Embodiments

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. The following will refer to the drawings and combine with the embodiments to detail the present invention.

[0029] Such as Figures 1 to 4As shown in the figure, the present invention provides a gravity type quick-release hook with a labor-saving reset function, which includes a lug plate 1. A hole for connecting with a lifting rigging is provided on the lug plate 1. The lug plate 1 is connected with two pull plates 3 through a lug shaft 2. The bottom end of the pull plate 3 is connected with a hook body 5 through a hook body shaft 4. Both the lug plate 1 and the hook body 5 are located between the two pull plates 3.

[0030] The center of gravity of the hook body 5 is located above the hook body shaft 4, and the center of gravity of the hook body 5 is not collinear with the line connecting the lug shaft 2 and the hook body shaft 4. The hook mouth of the hook body 5 faces the side of the center of gravity of the hook body 5.

[0031] A blind hole is provided at the top of the hook body 5, and a first limiting member is installed in the blind hole. A second limiting member is rotatably connected between the two pull plates 3. One end of a return spring 6 is connected to the top end of the second limiting member, and the other end of the return spring 6 is fixedly connected to the two pull plates 3 through a pin shaft.

[0032] When the hook body 5 is in the reset state, the bottom end of the second limiting member is in limiting cooperation with the first limiting member, and the center of the hook cavity of the hook body 5 is not collinear with the line connecting the lug shaft 2 and the hook body shaft 4.

[0033] In a further optimized solution, the second limiting member includes a resistance rod 8. The resistance rod 8 is rotatably connected between the two pull plates 3 through a resistance rod shaft 9. The return spring 6 is connected to the top end of the resistance rod 8. A second locking tongue is provided at the bottom end of the resistance rod 8, and the second locking tongue is in limiting cooperation with the first limiting member.

[0034] In a further optimized solution, the first limiting member includes a first locking tongue 11 slidably arranged in the blind hole. The second locking tongue is in limiting cooperation with the first locking tongue 11. One end of a locking tongue compression spring 12 is fixedly connected in the blind hole, and the other end of the locking tongue compression spring 12 is fixedly connected to the first locking tongue 11.

[0035] In a further optimized solution, the top surface of the first locking tongue 11 and the bottom surface of the second locking tongue are both inclined planes, and the two inclined planes are arranged oppositely. The inclined plane of the first locking tongue 11 faces the opposite direction of the hook mouth of the hook body 5, and the inclined plane of the second locking tongue faces the opposite direction of the inclined plane of the first locking tongue 11.

[0036] In a further optimized solution, the lower cross-section of the first locking tongue 11 is circular, and the upper cross-section of the first locking tongue 11 is rectangular. A locking tongue pressing plate 10 is fixedly connected to the hook body 5. A rectangular hole is provided in the middle of the locking tongue pressing plate 10. The rectangular section of the first locking tongue 11 is limited and slidably sleeved in the rectangular hole, and the circular section of the first locking tongue 11 is in limiting cooperation with the locking tongue pressing plate 10.

[0037] In a further optimized solution, the length of the resistance rod 8 above the resistance rod shaft 9 is greater than the length of the resistance rod 8 below the resistance rod shaft 9.

[0038] A further optimized solution is that the two pull plates 3 are connected with a limit block 7 through a pin shaft, and the two ends of the limit block 7 are respectively in contact with the two pull plates 3; the top of the resistance rod 8 is limited by the limit block 7, and the limit block 7 and the reset spring 6 are both located on the same side of the resistance rod 8.

[0039] According to a further optimized solution, the limit block 7 is a rectangular structure, and a vertical surface of the limit block 7 contacts a side surface of the resistance rod 8 .

[0040] According to a further optimization scheme, a clamping assembly is provided on the back side of the two pull plates 3 , and the clamping assembly abuts against the resistance rod 8 .

[0041] Further optimized solution, the clamping assembly includes a threaded sleeve 13 fixedly connected to the pull plate 3, a light hole is opened on the pull plate 3, and the threaded sleeve 13 is arranged corresponding to the light hole; the threaded sleeve 13 is sequentially installed with a ball 16, a ball compression spring 15 and an adjusting stud 14, the adjusting stud 14 is threadedly connected to the end of the threaded sleeve 13 away from the pull plate 3, and the two ends of the ball compression spring 15 are respectively abutted against the ball 16 and the adjusting stud 14; both sides of the resistance rod 8 are provided with a conical blind hole, and the conical blind hole is arranged corresponding to the light hole;

[0042] When the resistance rod 8 is in the reset state, the ball 16 is pushed into the tapered blind hole by the ball compression spring 15 .

[0043] The gravity quick-release hook with labor-saving resetting function provided by the present invention has the following working principles:

[0044] Before lifting, the quick-release hook is in a reset state, and the rigging is manually hung into the hook cavity of the quick-release hook body 5. The ball compression spring 15 compresses the ball 16 to contact the conical blind hole on the resistance rod 8, providing an initial resistance F1 for the rotation of the hook body 5. The reset tension spring 6 tightens the upper end of the resistance rod 8 to contact the limit block 7, providing an initial resistance F2 for the rotation of the hook body 5. The rotating adjustment stud 14 can increase or decrease the resistance F2. The upper length of the resistance rod 8 is greater than the lower length of the resistance rod 8. Through the principle of lever amplification, the resistance between the first locking tongue 11 and the lower end of the resistance rod 8 increases, providing a final resistance distance F4 for the rotation of the hook body 5. At this time, the rigging is light in weight and cannot rotate the hook body 5 through the torque formed by eccentricity.

[0045] During the trial lifting, the lifting equipment slowly raises the quick release hook and tightens the rigging. At this time, the resistance distance F4 still cannot be broken through, so that the rigging can be prevented from being separated from the hook body 5 due to the rotation of the hook body 5 during the trial lifting.

[0046] After the trial hoisting to check that the hooking is correct, during the formal hoisting, the rigging force gradually increases. After the torque provided by the rigging force is greater than the resistance distance F4, the hook body 5 rotates to enter the load-bearing self-unhooking state. During this process, the hook body 5 drives the first locking tongue 11 to turn the resistance rod 8 to rotate. After the resistance rod 8 rotates to a certain angle, the first locking tongue 11 disengages from the resistance rod 8. The rotation torque provided by the deadweight of the hook body 5 is much smaller than the rigging torque, and the hook body 5 is balanced.

[0047] During this process, the ball 16 disengages from the tapered blind hole on the resistance rod 8, and the resistance F1 disappears. There is friction when the ball 16 contacts the side surface of the resistance rod 8, providing a resistance F3 for the rotation of the hook body 5. The resistance rod 8 overcomes the resistance F3 under the action of the return spring 6, causing the resistance rod 8 to return to its original position, and the ball 16 re-enters the tapered blind hole on the resistance rod 8.

[0048] After being hoisted in place, the quick-release hook descends, the force on the rigging decreases, the rotational moment provided by the self-weight of the hook body 5 is greater than the rigging moment, the hook body 5 continues to rotate, the hook opening tilts downward, and the rigging disengages from the hook body 5, completing the hoisting operation.

[0049] During the reset process, manually operate to rotate the hook body 5 in the reverse direction. The inclined surface of the first locking tongue 11 contacts the lower inclined surface of the resistance rod 8, pushing the first locking tongue 11 downward. After the first locking tongue 11 passes over the resistance rod 8, it returns to its initial state. During this process, the manual operation only needs to overcome the moment generated by the self-weight of the hook body 5 and the moment generated by the resistance of the locking tongue compression spring 12.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A gravity quick-release hook with a labor-saving reset function, characterized in that: The invention comprises a lifting lug plate (1), wherein the lifting lug plate (1) is provided with a hole for connecting with a lifting rigging; the lifting lug plate (1) is connected to two pulling plates (3) via a lifting lug shaft (2); the bottom end of the pulling plate (3) is connected to a hook body (5) via a hook body shaft (4); the lifting lug plate (1) and the hook body (5) are both located between the two pulling plates (3); The center of gravity of the hook body (5) is located above the hook body axis (4), and the center of gravity of the hook body (5) is not colinear with the line connecting the ear axis (2) and the hook body axis (4), and the hook mouth of the hook body (5) faces the center of gravity side of the hook body (5); A blind hole is provided at the top of the hook body (5), and a first stopper is installed in the blind hole; a second stopper is rotatably connected between the two pull plates (3), and one end of a reset spring (6) is connected to the top of the second stopper, and the other end of the reset spring (6) is connected and fixed to the two pull plates (3) via a pin shaft; When the hook body (5) is in a reset state, the bottom end of the second limiting member is in limiting cooperation with the first limiting member, and the center of the hook cavity of the hook body (5) is not colinear with the line connecting the hanging ear axis (2) and the hook body axis (4).

2. The gravity quick-release hook with labor-saving reset function according to claim 1, characterized in that: The second limiting member includes a resistance rod (8), and the resistance rod (8) is rotatably connected between the two pull plates (3) through a resistance rod shaft (9), and the reset spring (6) is connected to the top end of the resistance rod (8); the bottom end of the resistance rod (8) is provided with a second locking tongue, and the second locking tongue is limitedly matched with the first limiting member.

3. The gravity quick-release hook with labor-saving reset function according to claim 2, characterized in that: The first limiting member comprises a first locking tongue (11) slidably arranged in the blind hole, and the second locking tongue is limitedly matched with the first locking tongue (11); one end of a locking tongue compression spring (12) is fixedly connected in the blind hole, and the other end of the locking tongue compression spring (12) is fixedly connected to the first locking tongue (11).

4. The gravity quick-release hook with labor-saving reset function according to claim 3, characterized in that: The top surface of the first locking tongue (11) and the bottom surface of the second locking tongue are both inclined surfaces, and the two inclined surfaces are arranged opposite to each other; the inclined surface of the first locking tongue (11) is oriented opposite to the hook mouth of the hook body (5), and the inclined surface of the second locking tongue is oriented opposite to the inclined surface of the first locking tongue (11).

5. The gravity quick-release hook with labor-saving reset function according to claim 4, characterized in that: The lower cross section of the first locking tongue (11) is circular, and the upper cross section of the first locking tongue (11) is rectangular; a locking tongue pressing plate (10) is fixedly connected to the hook body (5), a rectangular hole is opened in the middle of the locking tongue pressing plate (10), the rectangular section of the first locking tongue (11) is limitedly slidably sleeved in the rectangular hole, and the circular section of the first locking tongue (11) is limitedly matched with the locking tongue pressing plate (10).

6. The gravity quick-release hook with labor-saving reset function according to claim 2, characterized in that: The length of the resistance rod (8) above the resistance rod shaft (9) is greater than the length of the resistance rod (8) below the resistance rod shaft (9).

7. The gravity quick-release hook with labor-saving reset function according to claim 2, characterized in that: A limit block (7) is connected between the two pull plates (3) via a pin shaft, and the two ends of the limit block (7) are respectively in contact with the two pull plates (3); the top of the resistance rod (8) is limitedly matched with the limit block (7), and the limit block (7) and the reset spring (6) are both located on the same side of the resistance rod (8).

8. The gravity quick-release hook with labor-saving reset function according to claim 7, characterized in that: The limit block (7) is a rectangular structure, and a vertical surface of the limit block (7) contacts a side surface of the resistance rod (8).

9. The gravity quick-release hook with labor-saving reset function according to claim 2, characterized in that: A clamping assembly is provided on the back side of the two pulling plates (3), and the clamping assembly abuts against the resistance rod (8).

10. The gravity quick-release hook with labor-saving reset function according to claim 9, characterized in that: The clamping assembly comprises a threaded sleeve (13) fixedly connected to the pull plate (3), a light hole is opened on the pull plate (3), and the threaded sleeve (13) is arranged corresponding to the light hole; a ball (16), a ball compression spring (15) and an adjusting stud (14) are installed in sequence in the threaded sleeve (13), and the adjusting stud (14) is threadedly connected to the end of the threaded sleeve (13) away from the pull plate (3), and the two ends of the ball compression spring (15) are respectively in contact with the ball (16) and the adjusting stud (14); both sides of the resistance rod (8) are provided with conical blind holes, and the conical blind holes are arranged corresponding to the light hole; When the resistance rod (8) is in a reset state, the ball (16) is pushed into the conical blind hole by the ball compression spring (15).

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