Hoisting clamp with self-locking function
By designing lifting clamps with self-locking function, the sleeve, slide rod and chain are used to achieve automatic locking of the hook, which solves the problem of loose hooks causing workpiece drop during long-term use of existing spreaders, and improves the safety and compatibility of lifting operations.
Patent Information
- Application Number
- CN202421732310.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-22
AI Technical Summary
During the long-term use of existing spreaders, the connection between the hook and the boom is loose, causing the hook to shake and lose its limiting effect on the workpiece, which easily leads to the workpiece falling and poses safety hazards.
A lifting clamp with self-locking function is designed. By setting up a sleeve, slide rod and support rod, the chain is used to drive the hook to rotate, so that its side wall surface is close to the outer wall surface of the workpiece, and automatic locking is achieved.
Effectively prevent workpieces from falling, improve safety of lifting operations, and adapt to workpieces of different sizes through adjustment holes, improving compatibility and reliability.
Smart Images
Figure CN222809123U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hoisting, in particular to a hoisting clamp with a self-locking function. Background Art
[0002] Large ring forgings are essential key components of large equipment and are widely used in offshore wind power, nuclear power, hydropower, oil refining, aerospace and other fields. After the large ring forgings are forged, the forging blanks need to be subjected to post-processing processes such as deburring, trimming, cleaning, heat treatment, and surface treatment to improve the surface quality and integrity of the forgings. During the post-processing of the ring forgings, a hoist is usually used to transfer the forging blanks of the large ring forgings. The hoist is connected to the output end of the overhead crane, and the overhead crane lifts the workpiece through the hoist and moves the workpiece to the target position.
[0003] In the prior art, the structure of the sling usually includes several hooks arranged in a reversing direction, the hooks are detachably mounted on the boom, the boom is used to connect to the output end of the overhead travelling crane, and the several hooks are used to jointly limit the radial displacement of the workpiece, thereby limiting the position of the workpiece and fixing it. However, during the long-term use of this sling, when the connection between a hook and the boom is loose, the hook will shake, thereby losing the limiting effect on the workpiece, which may easily cause the workpiece to fall during the movement, posing a great safety hazard and reducing the safety of the lifting operation. Utility Model Content
[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a lifting clamp with a self-locking function. By setting a sleeve, a sliding rod and a support rod, the hook can automatically lock the workpiece during the lifting process, thereby preventing the workpiece from falling and improving the safety of the lifting operation.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A lifting clamp with a self-locking function comprises a sleeve, a plurality of first connecting plates are evenly spaced along the circumference on the outer circumference of the sleeve, a sliding rod is slidably mounted inside the sleeve, a plurality of supporting rods are evenly spaced on the outer circumference of the sliding rod, a hook is rotatably mounted on a single supporting rod, the hook corresponds to the first connecting plate one by one, and a single hook is connected to the corresponding first connecting plate through a chain;
[0007] The sleeve is connected to the output end of the lifting device, and the lifting device drives the sleeve to make an upward linear motion along the vertical direction relative to the slide rod, and drives the corresponding hook to rotate through the chain, so that the side walls of multiple hooks are simultaneously close to the outer wall of the workpiece, thereby locking the workpiece.
[0008] As a further improvement of the above technical solution:
[0009] A single first connecting plate is provided with a first connecting hole for cooperating with a corresponding chain.
[0010] The head section of a single hook is provided with a second connecting hole for cooperating with a corresponding chain.
[0011] A locking hole is provided in the middle section of a single hook, and the hook is rotatably mounted with a corresponding support rod through the locking hole.
[0012] A hook claw is provided at the tail section of the single hook, and the hook supports the workpiece through the hook claw, thereby lifting the workpiece.
[0013] A single support rod is provided with a plurality of adjustment holes along its length direction.
[0014] A central hole is provided in the middle of the sleeve, and the sleeve is slidably mounted on the slide rod through the central hole.
[0015] A first protrusion and a second protrusion are sequentially mounted on the outer circumferential surface of the slide rod from top to bottom, a flat surface is arranged on the bottom end surface of the first protrusion, and an inclined surface is arranged on the outer wall surface of the second protrusion.
[0016] A plurality of second connecting plates are arranged on the outer circumferential surface of the sleeve at intervals along the circumference, and a claw is hingedly connected to each second connecting plate;
[0017] The clamping claw cooperates with the plane to limit the sliding rod;
[0018] The clamping claw slides along the inclined surface, thereby releasing the restriction of the sliding rod by the first protrusion.
[0019] The single second connecting plate is hinged to the corresponding claw through the first cylindrical pin.
[0020] The beneficial effects of the utility model are as follows:
[0021] The utility model has a compact and reasonable structure and is easy to operate. By arranging a sleeve, a sliding rod and a chain, the hook can be rotated relative to the support rod, so that the side wall surface of the hook is close to the outer circumferential surface of the workpiece during the lifting process, the workpiece is locked and positioned, the workpiece is prevented from falling, and the safety of the lifting operation is improved.
[0022] The utility model also has the following advantages:
[0023] (1) In the utility model, by opening a plurality of adjustment holes along the length direction of the support rod, the sling clamp can be matched with workpieces of different sizes, thereby improving the compatibility of the device.
[0024] (2) In the utility model, an L-shaped square hook claw is provided, the horizontal section of which is in contact with the bottom wall surface of the workpiece, and the vertical section of which is in contact with the outer circumferential surface of the workpiece, thereby effectively locking and limiting the workpiece.
[0025] (3) In the present invention, by providing the first protrusion and the chain, double limiting can be achieved between the sleeve and the slide rod, which facilitates the adjustment of the installation position of the hook on the support rod and can effectively prevent the slide rod from falling out of the sleeve, thereby improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of the utility model.
[0027] Figure 2 It is a schematic diagram of the utility model in working state.
[0028] Figure 3 A half-section view of the utility model Figure 1 .
[0029] Figure 4 A half-section view of the utility model Figure 2 .
[0030] Figure 5 A half-section view of the utility model Figure 3 .
[0031] Figure 6 It is a schematic diagram of the installation structure of the slide rod and the support rod in the utility model.
[0032] Figure 7 for Figure 6 main view.
[0033] Figure 8 It is a schematic diagram of the installation structure of the sleeve and the first connecting plate and the second connecting plate in the utility model.
[0034] Fig. 9 It is a structural schematic diagram of the lifting hook in the utility model.
[0035] Among them: 1. first connecting plate; 101. first connecting hole; 2. second connecting plate; 3. sleeve; 301. center hole; 4. first cylindrical pin; 5. claw; 6. hook; 601. second connecting hole; 602. locking hole; 603. claw; 7. chain; 8. slide rod; 9. support rod; 901. adjustment hole; 10. second cylindrical pin; 11. first protrusion; 1101. plane; 12. second protrusion; 1201. inclined surface; 13. workpiece. DETAILED DESCRIPTION
[0036] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.
[0037] The structure and functions of the utility model are as follows:
[0038] like Figure 1-Figure 9As shown, a hoisting clamp with a self-locking function comprises a sleeve 3, a plurality of first connecting plates 1 are evenly spaced along the circumference of the outer circumference of the sleeve 3, a sliding rod 8 is slidably installed inside the sleeve 3, a plurality of support rods 9 are evenly spaced on the outer circumference of the slide rod 8, a hook 6 is rotatably installed on a single support rod 9, the hook 6 corresponds to the first connecting plate 1 one by one, and a single hook 6 is connected to the corresponding first connecting plate 1 through a chain 7; the sleeve 3 is connected to the output end of the lifting device, the lifting device drives the sleeve 3 to move upward linearly relative to the slide rod 8 along the vertical direction, and drives the corresponding hook 6 to rotate through the chain 7, so that the side walls of the plurality of hooks 6 are simultaneously close to the outer wall of the workpiece 13, and then the workpiece 13 is locked. In the utility model, by arranging the sleeve 3, the hook 6, the slide rod 8 and the support rod 9, the hoisting clamp can automatically clamp the workpiece 13 during the hoisting process, thereby preventing the workpiece 13 from falling and improving the safety of the hoisting operation.
[0039] A first connection hole 101 for cooperating with the corresponding chain 7 is provided on the single first connection plate 1, and the single first connection plate 1 is connected to one end of the corresponding chain 7 through the first connection hole 101 thereon;
[0040] The head section of a single hook 6 is provided with a second connection hole 601 for cooperating with the corresponding chain 7. The single hook 6 is connected to the other end of the corresponding chain 7 through the second connection hole 601 thereon.
[0041] Thus, the sleeve 3 and the hook 6 are connected by the chain 7 , and when the sleeve 3 moves, the hook 6 can be driven to move by the chain 7 .
[0042] In the utility model, three first connecting plates 1, three second connecting plates 2, three chains 7, three hooks 6, and three supporting rods 9 are arranged;
[0043] The three first connecting plates 1 and the three second connecting plates 2 are evenly spaced and arranged along the outer circumferential surface of the sleeve 3, and the three second connecting plates 2 are arranged below the three first connecting plates 1;
[0044] In addition, the three first connecting plates 1 and the sleeve 3, and the three second connecting plates 2 and the sleeve 3 can be fixed by welding, or by an integral casting structure.
[0045] A locking hole 602 is provided in the middle of a single hook 6, and the hook 6 is rotatably mounted with the corresponding support rod 9 through the locking hole 602. The locking hole 602 corresponds to the adjustment hole 901.
[0046] A single support rod 9 is provided with a plurality of adjustment holes 901 along its length. In the present invention, an adjustment slot is provided on the support rod 9, and adjustment holes 901 are provided on both symmetrical side walls of the adjustment slot; the hook 6 is installed in the adjustment slot, and the second cylindrical pin 10 passes through a locking hole 602 and the adjustment holes 901 on both symmetrical side walls of the adjustment slot at the same time, thereby realizing the rotational installation between the hook 6 and the corresponding support rod 9;
[0047] In addition, along the length direction of the support rod 9, a plurality of adjustment holes 901 are opened on the end surface thereof, so that the hanger clamp can match workpieces 13 of different sizes, thereby improving the compatibility of the device.
[0048] The tail section of the single hook 6 is provided with a hook 603, and the hook 6 supports the workpiece 13 through the hook 603, thereby lifting the workpiece 13. The hook 603 is L-shaped, and the horizontal section of the hook 603 fits with the bottom wall surface of the workpiece 13, and the vertical section of the hook 603 fits with the outer circumferential surface of the workpiece 13, thereby effectively fixing and limiting the workpiece 13.
[0049] A central hole 301 is provided in the middle of the sleeve 3, and the sleeve 3 is slidably mounted with the slide bar 8 through the central hole 301. In the utility model, the sleeve 3 and the slide bar 8 are slidably matched, and the first protrusion 11 is provided to achieve the first level of position limiting between the sleeve 3 and the slide bar 8; the chain 7 is provided to achieve the second level of position limiting between the sleeve 3 and the slide bar 8; thereby effectively preventing the slide bar 8 from coming out of the sleeve 3, and improving the reliability of the device.
[0050] The first protrusion 11 and the second protrusion 12 are sequentially installed on the outer circumference of the slide bar 8 from top to bottom, the bottom end surface of the first protrusion 11 is provided with a flat surface 1101, and the outer wall surface of the second protrusion 12 is provided with an inclined surface 1201. The first protrusion 11 is used to perform the first limit on the slide bar 8; the second protrusion 12 is used to release the limit on the slide bar 8.
[0051] Several second connecting plates 2 are arranged at intervals along the circumference on the outer circumferential surface of the sleeve 3, and a claw 5 is hinged on a single second connecting plate 2; the claw 5 cooperates with the plane 1101 to limit the slide bar 8; the claw 5 slides along the inclined surface 1201 to release the limit of the slide bar 8 by the first protrusion 11. Specifically, by arranging the claw 5 on the sleeve 3, the claw 5 cooperates with the plane 1101 at the bottom of the first protrusion 11, thereby clamping the slide bar 8 to prevent the slide bar 8 from moving downward. At this time, the sling clamp is in a free state, and the hook 6 is not locked;
[0052] When lifting is required, the lifting device drives the sleeve 3 to move vertically downward relative to the slide bar 8, so that the claw 5 slides along the inclined surface 1201 of the second protrusion 12, thereby making the claw 5 disengage from the first protrusion, thereby releasing the limiting effect of the first protrusion 11 on the slide bar 8.
[0053] The single second connecting plate 2 is hinged to the corresponding claw 5 through the first cylindrical pin 4. The claw 5 can rotate relative to the second connecting plate 2 by providing the first cylindrical pin 4.
[0054] The working process of the utility model is as follows:
[0055] Initially, the claw 5 cooperates with the flat surface 1101 at the bottom of the first protrusion 11 to clamp the slide bar 8, so that the chain 7 between the sleeve 3 and the hook 6 is in a relaxed state;
[0056] At this time, the installation position of the hook 6 on the support rod 9 is adjusted according to the size of the workpiece 13 to be transported;
[0057] Subsequently, the lifting device drives the lifting clamp to move to the top of the workpiece 13 to be transported, and then the lifting device drives the lifting clamp to descend in the vertical direction until the hook 6 contacts the ground;
[0058] Next, the lifting device drives the sleeve 3 to perform a downward linear motion relative to the slide bar 8 in the vertical direction, so that the claw 5 is disengaged from the first protrusion 11, thereby releasing the restriction of the first protrusion 11 on the slide bar 8;
[0059] Finally, the lifting device drives the sleeve 3 to make an upward linear motion in the vertical direction until the chain 7 between the sleeve 3 and the hook 6 is in a tensioned state. At this time, the sleeve 3 drives the corresponding hook 6 to rotate through the chain 7, so that the vertical section of the hook 603 is in close contact with the outer circumferential surface of the workpiece 13; the lifting device drives the lifting clamp to continue to make an upward linear motion in the vertical direction, so that the horizontal section of the hook 603 is in close contact with the bottom surface of the workpiece 13, thereby locking and lifting the workpiece 13 through the lifting clamp.
[0060] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.
Claims
1. A lifting clamp with self-locking function, characterized in that: The invention comprises a sleeve (3), a plurality of first connecting plates (1) are evenly spaced along the circumference on the outer circumference of the sleeve (3), a sliding rod (8) is slidably mounted inside the sleeve (3), a plurality of supporting rods (9) are evenly spaced on the outer circumference of the sliding rod (8), a hook (6) is rotatably mounted on a single supporting rod (9), the hook (6) corresponds to the first connecting plate (1) one by one, and a single hook (6) is connected to the corresponding first connecting plate (1) via a chain (7); The sleeve (3) is connected to the output end of the lifting device, and the lifting device drives the sleeve (3) to make an upward linear movement along the vertical direction relative to the slide bar (8), and drives the corresponding hooks (6) to rotate through the chain (7), so that the side walls of multiple hooks (6) are simultaneously in close contact with the outer wall of the workpiece (13), thereby locking the workpiece (13).
2. A lifting clamp with self-locking function as claimed in claim 1, characterized in that: A single first connecting plate (1) is provided with a first connecting hole (101) for cooperating with a corresponding chain (7).
3. A lifting clamp with self-locking function as claimed in claim 1, characterized in that: A head section of a single hook (6) is provided with a second connection hole (601) for cooperating with a corresponding chain (7).
4. A lifting clamp with self-locking function as claimed in claim 1, characterized in that: A locking hole (602) is provided in the middle section of a single hook (6), and the hook (6) is rotatably mounted on a corresponding support rod (9) through the locking hole (602).
5. The lifting clamp with self-locking function as claimed in claim 1, characterized in that: The tail section of the single lifting hook (6) is provided with a hook claw (603), and the lifting hook (6) supports the workpiece (13) through the hook claw (603), thereby lifting the workpiece (13).
6. A lifting clamp with self-locking function as claimed in claim 1, characterized in that: A single support rod (9) is provided with a plurality of adjustment holes (901) along its length direction.
7. The lifting clamp with self-locking function as claimed in claim 1, characterized in that: A central hole (301) is provided in the middle of the sleeve (3), and the sleeve (3) is slidably mounted on the slide rod (8) through the central hole (301).
8. The lifting clamp with self-locking function as claimed in claim 1, characterized in that: A first protrusion (11) and a second protrusion (12) are sequentially mounted on the outer circumferential surface of the slide bar (8) from top to bottom, the bottom end surface of the first protrusion (11) is provided with a flat surface (1101), and the outer wall surface of the second protrusion (12) is provided with an inclined surface (1201).
9. A lifting clamp with self-locking function as claimed in claim 8, characterized in that: A plurality of second connecting plates (2) are arranged at intervals along the circumference on the outer circumferential surface of the sleeve (3), and a claw (5) is hingedly connected to each second connecting plate (2); The clamping claw (5) cooperates with the plane (1101) to limit the position of the sliding rod (8); The clamping claw (5) slides along the inclined surface (1201), thereby releasing the restriction of the sliding rod (8) by the first protrusion (11).
10. A lifting clamp with self-locking function as claimed in claim 9, characterized in that: The single second connecting plate (2) is hingedly connected to the corresponding claw (5) via a first cylindrical pin (4).