Automatic unhooking device

Abstract

The automatic hook release device relates to a hook, comprising a hook body, a sling connecting piece (1) and a connecting frame (2), wherein a supporting portion (3) is provided at the front end of the connecting frame (2), the hook body comprises an upper hook body (4) and a lower hook body (5), the upper portion of the upper hook body (4) is hinged to the connecting frame (2) behind the supporting portion (3), a clamping shoulder (6) is provided at the outer edge of the upper hook body (4), one end of the lower hook body (5) is hinged to the lower end of the upper hook body (4), the free end of the lower hook body (5) is retracted upward, the free end of the lower hook body (5) is against the supporting portion (3) of the connecting frame (2), the sling connecting piece (1) is hinged to the connecting frame (2), the lower end is against the clamping shoulder (6) at the outer edge of the upper hook body (4), and an unlocking spring (7) is connected between the sling connecting piece (1) and the connecting frame (2). The automatic hook release device has the advantages of reasonable design, simple structure, light weight, reliable use and good hook release effect.

Description

Technical Field

[0001] The invention relates to a hook, in particular to a hook device capable of realizing automatic unhooking. Background Art

[0002] When operating mechanical equipment like cranes, cargo is primarily hooked to the hook with manual assistance, and then manually removed from the hook after the lift is complete, resulting in inefficient unhooking. Drone delivery uses radio-controlled drones controlled by their own programs to carry packages, enabling automated delivery, improving delivery efficiency while reducing labor costs. The rise of drone delivery has led to unprecedented demand for automatic unhooking devices. Automatic unhooking devices come in a variety of configurations, but existing ones are complex or rely on electric motors to achieve automatic unhooking, increasing both equipment cost and weight. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in view of the above problems, to provide an automatic unhooking device with a simple structure and reasonable design.

[0004] The lower end of the hook body is hinged on the upper end of the hook body, and the lower end of the hook body is hinged on the upper end of the hook body, so that the free end of the upper hook body and the lower end of the hook body form a ring structure. The sling connecting piece is hinged on the connecting frame at the rear of the upper hook body, and the end located above the hinge point is connected to the sling, and the lower end rests on the shoulder of the outer edge of the upper hook body. An unlocking spring is connected between the sling connecting piece and the connecting frame. After the cargo tension is lost, the unlocking spring acts to make the lower end of the sling connecting piece move away from the shoulder of the upper hook body, and the hook body is unlocked and released.

[0005] The technical effect of the present invention is: it has the advantages of reasonable design, simple structure, light weight, reliable use, and good uncoupling effect. It adopts a purely mechanical structure with few structural components, can maximize the reduction of its own weight, and can achieve the effect of automatic uncoupling when the goods fall to the ground. It is very suitable for application in drone express delivery business. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a structural diagram of the cargo hanging state in Example 1 of the present invention;

[0007] Figure 2 This is a schematic diagram of the unlocking spring action after the cargo falls to the ground in Example 1 of the present invention;

[0008] Figure 3 This is a schematic diagram of the cargo after unhooking in Example 1 of the present invention;

[0009] Figure 4 This is a structural diagram of the cargo hanging state in Example 2 of the present invention;

[0010] Figure 5 This is a schematic diagram of the cargo after unhooking in Example 2 of the present invention;

[0011] Figure 6 This is a schematic diagram of converting the locking state of a card block according to embodiment 3 of the present invention;

[0012] Figure 7 This is a schematic diagram of converting the unlocking state of a card block according to embodiment 3 of the present invention. DETAILED DESCRIPTION

[0013] Example 1:

[0014] like Figure 1 、 2 As shown in Figure 3, the automatic unhooking device includes a hook body, a sling connector 1 and a connecting frame 2. The front end of the connecting frame 2 is provided with a supporting portion 3. The hook body includes an upper hook body 4 and a lower hook body 5. The upper hook body 4 and the lower hook body 5 are both arc-shaped. The upper part of the upper hook body 4 is hinged to the connecting frame 2 behind the supporting portion 3. The outer edge of the upper hook body 4 is provided with a shoulder 6. One end of the lower hook body 5 is hinged to the lower end of the upper hook body 4. The free end of the lower hook body 5 is retracted upward, so that the upper hook body 4 and the lower hook body 5 form an annular structure. The free end of the lower hook body 5 rests on the abutment portion 3 of the connecting frame 2, and the sling connector 1 is hinged to the connecting frame 2 at the rear of the upper hook body 4. The end above its hinge point is connected to the sling, and the lower end rests on the shoulder 6 on the outer edge of the upper hook body 4. An unlocking spring 7 is connected between the sling connector 1 and the connecting frame 2. After the cargo tension is lost during the hanging of the cargo, the unlocking spring 7 is activated to move the lower end of the sling connector 1 away from the shoulder 6 of the upper hook body 4, and the hook body is unlocked and released.

[0015] The connecting frame 2 is composed of two sheet-like bodies, and the sling connector 1 and the hook body are hinged between the two sheet-like bodies.

[0016] The hook body, the sling connector 1 and the connecting frame 2 are made of metal or plastic.

[0017] In this embodiment, after the cargo falls to the ground, it is freed from the downward pull of the cargo, and the unlocking spring is activated, releasing the restraint at the hook shoulder. When the center of gravity of the hook is located on the side of the hinge point between the hook and the connecting frame that is close to the abutment, the hook deflects under the action of gravity, allowing the free end of the lower hook to break free from the restraint of the abutment and automatically open. If the center of gravity of the hook is located on the other side of the hinge point, the hook requires external force to open.

[0018] Example 2:

[0019] like Figure 4 and 5 As shown, the difference from embodiment 1 is that a release spring 8 is connected between the rear portion of the connecting frame 2 and the upper hook body 4. Relying on the action of the release spring 8, the opening action of the hook body can be made fast and reliable.

[0020] Example 3:

[0021] like Figure 6 and 7 As shown, unlike Example 2, a conversion block 9 is provided at the rear end of the connecting frame 2. The conversion block 9 is hinged to the connecting frame 2 at the middle portion. The release spring 8 is connected to the connecting frame 2 via one end connected to the conversion block 9. By twisting the conversion block 9, when the release spring 8 is located inside the hinge point between the conversion block 9 and the connecting frame 2, the free end of the conversion block 9 is not in contact with the sling connector 1. When located outside the hinge point, the free end of the conversion block 9 abuts against the sling connector 1, preventing the lower end of the sling connector 1 from automatically separating from the shoulder 6 of the upper hook body 4. The provision of the conversion block 9 enables the hook body to switch between automatically opened and manually opened states.

Claims

1. An automatic unhooking device, comprising a hook body and a sling connecting piece (1), characterized in that: The invention also comprises a connecting frame (2), wherein a supporting portion (3) is provided at the front end of the connecting frame (2), wherein the hook body comprises an upper hook body (4) and a lower hook body (5), wherein the upper hook body (4) and the lower hook body (5) are both arc-shaped, wherein the upper portion of the upper hook body (4) is hingedly connected to the connecting frame (2) at the rear of the supporting portion (3), wherein a clamping shoulder (6) is provided at the outer edge of the upper hook body (4), wherein one end of the lower hook body (5) is hingedly connected to the lower end of the upper hook body (4), and the free end of the lower hook body (5) is retracted upwards, so that the upper hook body (4) and the lower hook body (5) form an annular structure, wherein the lower hook body (5) The free end of the sling connector (1) abuts against the abutment portion (3) of the connecting frame (2); the sling connector (1) is hinged to the connecting frame (2) at the rear of the upper hook body (4); the end above the hinge point is connected to the sling, and the lower end abuts against the shoulder (6) at the outer edge of the upper hook body (4); an unlocking spring (7) is connected between the sling connector (1) and the connecting frame (2); when the cargo tension is lost during the hanging of the cargo, the unlocking spring (7) is activated to move the lower end of the sling connector (1) away from the shoulder (6) of the upper hook body (4), so that the hook body is unlocked and released.

2. The automatic unhooking device according to claim 1, characterized in that: A release spring (8) is connected between the rear portion of the connecting frame (2) and the upper hook body (4).

3. The automatic unhooking device according to claim 2, characterized in that: A conversion block (9) is provided at the rear end of the connecting frame (2). The conversion block (9) is hinged to the connecting frame (2) at the middle part. The release spring (8) is connected to the connecting frame (2) by being connected to one end of the conversion block (9). The conversion block (9) is twisted. When the release spring (8) is located inside the hinge point between the conversion block (9) and the connecting frame (2), the free end of the conversion block (9) is not in contact with the sling connecting member (1). When the release spring (8) is located outside the hinge point, the free end of the conversion block (9) abuts against the sling connecting member (1), so that the lower end of the sling connecting member (1) cannot automatically leave the clamping shoulder (6) of the upper hook body (4).

4. The automatic unhooking device according to claim 1, 2 or 3, characterized in that: The connecting frame (2) is composed of two sheet-like bodies, and the sling connecting piece (1) and the hook body are hinged between the two sheet-like bodies.

5. The automatic unhooking device according to claim 1, 2 or 3, characterized in that: The hook body, the sling connector (1) and the connecting frame (2) are made of metal or plastic.

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