Lifting appliance
By designing a crank-slider mechanism with drive rods and transmission rods on the lifting device, synchronous hooking and unhooking of the hook is achieved, solving the safety hazards caused by misoperation of existing lifting devices and improving the safety of the lifting process.
Patent Information
- Application Number
- CN202423087157.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-13
AI Technical Summary
When transporting goods, existing lifting equipment may cause the hook to fail to engage with the lifting lug simultaneously or fail to disengage from the lifting lug simultaneously after transport, posing a safety hazard, especially when transporting explosive or hazardous materials, which may lead to serious accidents.
Design a lifting device that uses a crank-slider mechanism consisting of a drive rod that slides on the main beam and an eccentrically hinged transmission rod to achieve synchronous hooking and unhooking of multiple hooks. Equipped with a return spring and a locking structure to ensure the stability of the hooks in the designated position, the synchronous rotation of the hooks is achieved through the horizontal reciprocating motion of the drive rod.
It enables synchronous hooking and unhooking, improving the safety of the hoisting process and preventing items from tilting or bumping due to misoperation, especially for explosive and dangerous goods.
Smart Images
Figure CN223495968U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting devices connected to cranes, and more particularly to a lifting device. Background Technology
[0002] A lifting device is a tool used for lifting heavy objects. It consists of a horizontally positioned main beam with lifting rings at the top for hooking onto the lifting equipment and hooks at the bottom. When moving items, operators must securely attach the hooks at the bottom of the main beam to the lifting lugs of the item being moved. Once the item is in position, the operator must disengage the hooks from the lugs to complete the move. However, during this process, human error may cause the hooks to connect only to one lug of the item during lifting, or one lug to remain attached to the hook after the move. In such cases, movement of the lifting device may cause the item to tilt and collide. If the item is a highly explosive or dangerous material such as a missile, this could lead to a serious safety accident. Therefore, existing lifting devices pose significant safety hazards when moving items. Utility Model Content
[0003] The purpose of this utility model is to provide a lifting device to solve the problem that existing lifting devices may cause serious safety accidents when transporting goods, due to misoperation, such as the hook not being simultaneously engaged with the lifting lug during transport or the hook not being simultaneously disengaged from the lifting lug after transport is completed.
[0004] To achieve the above objectives, the lifting device of this utility model adopts the following technical solution:
[0005] A lifting device includes a main beam with a group of hooks hinged to its bottom. The hinge axes of the hooks in the group extend parallel to each other and are spaced apart along the length of the main beam. A drive rod is also slidably mounted on the main beam along its length. Each hook is eccentrically hinged with a transmission rod, the other end of which is hinged to the drive rod. The drive rod, transmission rod, and hooks constitute a crank-slider mechanism. The lengths of the transmission rods are equal and the hook openings of the hooks face the same direction. When the drive rod reciprocates horizontally, the transmission rods can drive the hooks to rotate synchronously, causing the hook openings of the hooks to rotate to the hooking and unhooking positions.
[0006] Furthermore, the drive rod is equipped with a return spring that moves it toward the side where the drive hook rotates to the unhooked position.
[0007] Furthermore, the return spring is a tension spring located at one end of the drive rod, with one end of the tension spring connected to the crossbeam and the other end connected to the drive rod.
[0008] Furthermore, the lifting device also has a locking structure for holding the hook in the hooked position and the unhooked position.
[0009] Furthermore, the locking structure includes a first positioning hole and a second positioning hole on the drive rod, a locking hole on the main beam, and a locking pin for passing through the first positioning hole and the locking hole or the second positioning hole and the locking pin hole simultaneously. When the first positioning hole is aligned with the locking hole, the hook is in the hooked position, and when the second positioning hole is aligned with the locking hole, the hook is in the unhooked position.
[0010] Furthermore, the locking pin is an elastic locking tongue structure installed on the main beam.
[0011] Furthermore, the main beam includes a beam body and a hook seat disposed at the bottom of the beam body. The hook is hinged to the bottom of the hook seat, and the hook seat is provided with a positioning groove for determining the position of the lifting lug on the workpiece being lifted.
[0012] Furthermore, when the hook is in the unhooked position, the positioning groove is in front of the hook. When the hook rotates from the unhooked position to the hooked position, the hook passes through the lifting lug of the hanging component in the positioning groove.
[0013] Furthermore, the beam is a hollow box-shaped structure, with the hook seat located on the bottom wall of the beam and the drive rod installed inside the beam. The bottom wall of the beam has a through hole, and the other end of the drive rod passes through the through hole and is hinged to the hook.
[0014] Furthermore, the lifting rings at the top of the main beam are adjustable along the length of the main beam.
[0015] Beneficial Effects: This utility model's lifting device is a pioneering invention. Specifically, the lifting device includes a main beam and hooks hinged to the bottom of the main beam. A drive rod is also slidably mounted along the length of the main beam, and each hook is eccentrically hinged with a transmission rod of equal length. When transporting components, the drive rod is moved in the direction where the hooks are hooked onto the items. The drive rod drives multiple sets of hooks to rotate synchronously through the transmission rods, allowing multiple sets of hooks to simultaneously pass through the lifting lugs of the transported items. After the lifting operation is completed, the drive rod is moved in the direction away from the hooks hooking onto the items. The drive rod drives multiple sets of hooks to rotate synchronously through the transmission rods, allowing multiple sets of hooks to simultaneously disengage from the lifting lugs of the transported items. This utility model's lifting device enables multiple sets of hooks to engage and disengage synchronously, solving the problem of potential safety accidents caused by misoperation of existing lifting devices, where hooks may not engage with the lifting lugs simultaneously during transport or fail to disengage simultaneously after transport. Attached Figure Description
[0016] Figure 1 This is a cross-sectional view of a structural schematic diagram of one embodiment of the lifting device of this utility model;
[0017] Figure 2 for Figure 1 Right view of the schematic diagram of the embodiment;
[0018] Figure 3 for Figure 1 A schematic diagram of the hook being in the unhooked position in the embodiment;
[0019] Figure 4 for Figure 1 A schematic diagram of the hook being in the hook position in the embodiment;
[0020] Figure 5 for Figure 1 Front view of the hook holder with the hook installed in the middle;
[0021] Figure 6 for Figure 1 Left view of a hook holder with a hook installed.
[0022] In the diagram: 1. Lifting ring; 2. Main beam; 4. Hook seat mounting hole; 5. Quick release pin; 6. Hook seat; 61. Positioning groove; 62. Hook seat connection part; 63. Hook seat mounting part; 7. Hook; 9. Tension spring support; 10. Tension spring; 11. Drive rod; 12. Guide block; 13. Locking pin; 14. Handle; 15. Transmission rod; 16. First positioning hole; 17. Second positioning hole; 19. Center of gravity adjustment hole. Detailed Implementation
[0023] This utility model provides a drive rod that can slide horizontally back and forth on the main beam of the lifting device, and a transmission rod of equal length, with one end hinged to the drive rod and the other end hinged to the hook. The drive rod, transmission rod, and hook form a crank-slider mechanism. When the drive rod moves horizontally back and forth, the drive rod drives each hook to rotate synchronously through each transmission rod, so that the hook opening of the hook rotates to the hook position and the unhooking position.
[0024] Based on the above inventive concept, as a basic embodiment, such as Figure 1-2 As shown, the lifting device of this utility model includes a main beam 2. A group of hooks 7 are hinged to the bottom of the main beam 2. The hinge axes of each hook 7 extend parallel to each other and are spaced apart along the length of the main beam. A drive rod 11 is also slidably mounted on the main beam 2 along its length. Each hook 7 is eccentrically hinged with a transmission rod 15. The other end of the transmission rod 15 is hinged to the drive rod 11. The drive rod 11, transmission rod 15, and hooks 7 constitute a crank-slider mechanism. The lengths of each transmission rod 15 are equal, and the hook openings of each hook 7 face the same direction. During operation, the operator manipulates the drive rod 11 to perform a horizontal reciprocating motion. The drive rod 11 drives each hook 7 to rotate synchronously through each transmission rod 15, causing the hook openings of the hooks 7 to rotate to the hooking and unhooking positions.
[0025] To ensure that the hook 7 can automatically rotate from the hooked position to the unhooked position after the lifting device is moved, in a preferred embodiment, the drive rod 11 is equipped with a return spring that moves towards the side that drives the hook 7 to rotate to the unhooked position. The return spring can be a compression spring. In a preferred embodiment, the return spring is a tension spring 10.
[0026] The main beam 2 includes a tension spring support 9 mounted thereon. The tension spring support 9 is located at one end of a tension spring 10. One end of the tension spring 10 is fixed to the drive rod 11, and the other end is fixed to the tension spring support 9. The tension spring 10 and the drive rod 11 are on the same horizontal line. To facilitate operation of the drive rod 11, a handle 14 is also provided on the drive rod 11. The handle 14 is a rod-shaped structure.
[0027] The transmission rod 15 can be a rod of fixed length, but in a preferred embodiment, to facilitate adjustment of the final orientation of the hook opening when the hook 7 is in the hooked and unhooked positions, the transmission rod 15 is a threaded adjustment rod structure with adjustable length. It consists of a screw with external threads in the middle and sleeves with internal threads at both ends of the screw. The screw is threadedly connected to the sleeves at both ends, and the sleeves at the ends away from the screw are respectively hinged to the drive rod 11 and the hook 7. The length of the transmission rod 15 can be adjusted by rotating the sleeves to change the thread length of the screw extending into the sleeves.
[0028] To enhance safety during lifting and facilitate hook use, in a preferred embodiment, the lifting device is further equipped with a locking structure for holding the hook 7 in the hooked and unhooked positions. During transport, the locking structure secures the hook 7 in the hooked position, ensuring it remains unaffected by swaying of the lifting components or other external forces, thus improving the safety performance of the lifting device.
[0029] Once the lifting device has hoisted the item to the designated position, the locking mechanism will lock the hook 7 in the unhooked position, facilitating the smooth removal of the item from the hook 7. When the lifting device is not in operation, the hook 7 will remain in the unhooked position.
[0030] The locking structure includes a first positioning hole 16 and a second positioning hole 17 on the drive rod 11, a locking hole on the main beam, and a locking pin 13 for passing through both the first positioning hole 16 and the locking hole, or both the second positioning hole 17 and the locking pin hole. When the first positioning hole 16 is aligned with the locking hole, the hook 7 is in the hooked position; when the second positioning hole 17 is aligned with the locking hole, the hook 7 is in the unhooked position. In other embodiments, the locking structure may also include a first hook ring on the main beam 1 corresponding to the hooked position of the hook 7 and a second hook ring on the main beam 1 corresponding to the unhooked position of the hook 7, as well as a hook on the drive rod 11. When the operator attaches the hook to the first hook ring, the hook is in the hooked position; when the operator attaches the hook to the second hook ring, the hook is in the unhooked position.
[0031] Locking pin 13 is a resilient locking tongue structure; for example, locking pin 13 is an indexing pin. Figure 3-4 As shown, when the elastic locking tongue passes through the first positioning hole 16 or the second positioning hole 17, the locking pin is in an elastic recovery state. Initially, the elastic locking tongue of the locking pin 13 is located in the second positioning hole 17. At this time, the lifting device is not performing a lifting operation, and the hook 7 is in the unhooked position. When a lifting operation is required, the operator pulls the locking pin 13 and moves the drive rod 11 horizontally, causing the elastic locking tongue of the locking pin 13 to leave the second positioning hole 17. The second positioning hole 17 moves with the drive rod 11. After the tip of the elastic locking tongue of the locking pin 13 moves out of the second positioning hole 17, it abuts against the upper surface of the drive rod 11, and the elastic locking tongue is in an elastic compression state. The hook 7 rotates from the unhooked position towards the hooked position. When the hook 7 rotates to the hooked position, the first positioning hole 16 on the drive rod 11 also moves to the locking pin 13. Under the action of the elastic recovery force, the elastic locking tongue passes through the first positioning hole 16, and the hook 7 is in the hooked position.
[0032] The main beam 1 also includes a beam body and a hook seat 6 located at the bottom of the beam body. The hook 7 is hinged to the bottom of the hook seat 6. The hook seat 6 is provided with a positioning groove 61 for determining the position of the lifting lug on the workpiece being lifted. When the hook 7 is in the unhooked position, the positioning groove 61 is in front of the hook. When the hook 7 rotates from the unhooked position to the hooked position, during the adjustment operation of the adjustment component, the lifting lug of the adjustment component is first inserted into the positioning groove 61 of the hook. Then, the drive rod 11 is operated horizontally. The drive rod 11 drives multiple sets of hooks 7 to rotate synchronously through the transmission rod 11. During the rotation, the hook 7 passes through the lifting lug hole in the positioning groove 61.
[0033] The beam is a hollow box-shaped structure. The hook seat 6 is located on the bottom wall of the beam, and the drive rod 11 is installed inside the beam. A through hole is provided on the bottom wall of the beam, and the other end of the transmission rod 15 passes through the through hole and is hinged to the hook 7. A guide block 12 is provided on the bottom wall of the beam, and the drive rod 11 passes through the guide block 12. Under the guidance of the guide block 12, the drive rod 11 moves linearly inside the beam. The guide block 12 located at the first positioning hole 16 or the second positioning hole 17 is provided with a through hole, which is aligned with the locking hole located on the main beam. An operating window is provided on the side wall along the length of the beam. The operating window is located at the handle 14, and one end of the handle 14 extends out of the operating window. By operating the drive rod 11 through the handle 14, the hook 7 is rotated to the disengaged position and the engaged position.
[0034] The lifting ring 1 at the top of the main beam is adjustable along the length of the main beam. A center-of-gravity adjustment hole 19 is provided through the upper part of the side wall along the length of the beam. Before lifting, the lifting ring 1 of the lifting equipment is moved to the center-of-gravity position when the equipment is unloaded, and then the lifting ring 1 is fixed to the corresponding position on the main beam 2 using the quick-release pin 5. A hook seat mounting hole 4 for mounting the hook seat 6 is provided on the bottom side wall along the length of the main beam 2.
[0035] like Figure 5-6 As shown, the hook seat 6 includes a hook seat connecting part 62 and a hook seat mounting part 63. Both the hook seat connecting part 62 and the hook seat mounting part 63 are U-shaped beam structures with U-shaped grooves, and the two U-shaped beam structures are arranged back-to-back. The hook seat connecting part 62 has through holes on its two vertical side walls. During installation, the main beam 2 is inserted into the U-shaped groove of the hook seat connecting part 62, and the hook seat mounting hole 4 on the lower side wall of the main beam 2 is connected to the through holes on the two vertical side walls of the hook seat connecting part 62. The positioning groove 61 is provided through on the two vertical side walls at the bottom of the hook seat mounting part 63 of the hook seat 6. The hook 7 is located in the U-shaped groove of the U-shaped beam structure of the mounting part. When the lifting device is in the open state, the hook 7 is located behind the positioning groove 61. When the lifting device moves the component, the lifting lug of the component is first inserted into the positioning groove 61, and then the hook 7 on the main beam is rotated so that the hook 7 passes through the lifting lug in the positioning groove 61 at the same time.
[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.
Claims
1. A lifting device, characterized in that, The system includes a main beam, with a group of hooks hinged to its bottom. The hinge axes of the hooks in the group extend parallel to each other and are spaced apart along the length of the main beam. A drive rod is also slidably mounted on the main beam along its length. Each hook is eccentrically hinged with a transmission rod, the other end of which is hinged to the drive rod. The drive rod, transmission rod, and hooks form a crank-slider mechanism. The lengths of the transmission rods are equal and the hook openings of the hooks face the same direction. When the drive rod reciprocates horizontally, it can drive each hook to rotate synchronously through the transmission rods, so that the hook openings of the hooks rotate to the hooking and unhooking positions.
2. The lifting device according to claim 1, characterized in that, The drive rod is equipped with a return spring that moves it toward the side where the drive hook rotates to the unhooked position.
3. The lifting device according to claim 2, characterized in that, The reset spring is a tension spring located at one end of the drive rod. One end of the tension spring is connected to the crossbeam, and the other end is connected to the drive rod.
4. The lifting device according to any one of claims 1-3, characterized in that, The lifting device also has a locking structure for holding the hook in the hooked position and the unhooked position.
5. The lifting device according to claim 4, characterized in that, The locking structure includes a first positioning hole and a second positioning hole on the drive rod, a locking hole on the main beam, and a locking pin for passing through the first positioning hole and the locking hole or the second positioning hole and the locking pin hole simultaneously. When the first positioning hole is aligned with the locking hole, the hook is in the hooked position, and when the second positioning hole is aligned with the locking hole, the hook is in the unhooked position.
6. The lifting device according to claim 5, characterized in that, The locking pin is an elastic locking tongue structure installed on the main beam.
7. The lifting device according to any one of claims 1-3, characterized in that, The main beam includes a beam body and a hook seat located at the bottom of the beam body. The hook is hinged to the bottom of the hook seat, and the hook seat is provided with a positioning groove for determining the position of the lifting lug on the workpiece being lifted.
8. The lifting device according to claim 7, characterized in that, When the hook is in the unhooked position, the positioning groove is in front of the hook. When the hook rotates from the unhooked position to the hooked position, the hook passes through the lifting lug of the hanging component in the positioning groove.
9. The lifting device according to claim 7, characterized in that, The beam is a hollow box-shaped structure. The hook is located on the bottom wall of the beam, and the drive rod is installed inside the beam. The bottom wall of the beam has a through hole, and the other end of the drive rod passes through the through hole and is hinged to the hook.
10. The lifting device according to any one of claims 1-3, characterized in that, The lifting rings at the top of the main beam are adjustable along the length of the main beam.