A lifting clamp
By designing a lifting clamp with a self-rotating support ring and a limiting structure, the problem of existing clamps being unable to rotate was solved, enabling the product to rotate while in a lifted state and improving maintenance efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CAMA LUOYANG AVIATION PROTECTIVE EQUIP
- Filing Date
- 2025-05-09
- Publication Date
- 2026-06-23
AI Technical Summary
The existing lifting clamps cannot rotate after lifting the product, which makes it inconvenient to operate when inspecting different positions.
Design a lifting clamp that includes a support base and a support ring. The support ring is supported by a self-rotating rolling support body. The self-rotation of the support ring is achieved through a limiting structure and a fastening connection structure, allowing the product to rotate while it is lifted.
This allows the product to rotate while suspended, facilitating comprehensive inspection and maintenance and improving maintenance efficiency.
Smart Images
Figure CN224394423U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of load-bearing devices, and in particular relates to a lifting clamp. Background Technology
[0002] For larger cylindrical products, the commonly used lifting clamps are jaw-type clamps. These clamps typically include a lifting frame and two swingable jaws mounted on the frame. When lifting a product, the jaws clamp onto the outer circumference of the product, and the lifting frame is connected to a sling (or similar sling) to raise and lower the product as the sling moves.
[0003] When inspecting some products, it is necessary to inspect different positions along the circumference. However, commonly used lifting clamps cannot rotate the product after lifting it. When inspecting different positions, it is necessary to put the product down, rotate it at a certain angle, and then lift it again, which is very inconvenient. Utility Model Content
[0004] The purpose of this utility model is to provide a lifting clamp to solve the technical problem in the prior art that the lifting clamp cannot rotate the product after lifting it, which makes maintenance work inconvenient.
[0005] To achieve the above objectives, the technical solution of the lifting clamp provided by this utility model is as follows:
[0006] A lifting clamp includes a support base and a support ring. The support base is provided with a lifting connection structure for connecting lifting equipment. The support ring includes two interlocking semi-rings for clamping products. At least one end of the two interlocking semi-rings is separable to allow the product to enter the space formed by the interlocking semi-rings. The support base is provided with at least two rotatable rolling supports to jointly support the support ring and enable the support ring to roll. One of the support base and the support ring is provided with a limiting structure, and the other is provided with a limiting engagement structure that cooperates with the limiting structure to limit the axial position of the support ring.
[0007] As a further improvement, the two halves of the ring are connected by a separable fastening connection structure. The support base is provided with a support groove for the support ring to enter. The depth of the support groove is greater than the outer diameter of the half ring. The lifting connection structure is set at the top two ends of the support base.
[0008] As a further improvement, the fastening connection structure includes a locking hook assembly on one half-ring and a hook engagement member on the other half-ring. The locking hook assembly includes a locking hook seat and a swingable locking hook. During the swing stroke of the locking hook, it has a locked state that is engaged with the hook engagement member and a disengaged state that is separated from the hook engagement member.
[0009] As a further improvement, the lock hook is a U-shaped hook with threaded sections at both ends. The lock hook seat includes through holes for the two ends of the lock hook to pass through, and the threaded sections are connected to at least two nuts, at least one of which has a nut on one side of the through hole and at least one nut on the other side of the through hole.
[0010] As a further improvement, the limiting structure includes retaining edges at both ends of the support ring along the axial direction, with the two retaining edges located on the outer sides of the end faces of both ends of the support seat along the axial direction, and the end faces of both ends of the support seat constituting the limiting fit structure; or the limiting structure includes retaining edges at both ends of the support seat along the axial direction, with the two retaining edges located on the outer sides of the end faces of both ends of the support ring along the axial direction, and the end faces of both ends of the support ring constituting the limiting fit structure.
[0011] As a further improvement, the lifting clamp also includes an anti-rotation component. When the stop is set on the support ring, the stop has multiple through holes, and the support base has multiple mating holes that are coaxial with the through holes when the support ring rotates to a set angle so that the anti-rotation component can pass through. When the stop is set on the support base, the stop has multiple through holes, and the support ring has multiple mating holes that are coaxial with the support ring when the support ring rotates to a set angle so that the anti-rotation component can pass through.
[0012] As a further improvement, the flange is provided with an outward protrusion, and the through hole is provided on the outward protrusion.
[0013] As a further improvement, a clearance groove is provided at the center of the semi-circular upward-facing part to avoid protrusions on the product.
[0014] As a further improvement, the lifting clamp also includes an arc-shaped pad for mounting on the inner arc surface of the semi-ring.
[0015] As a further improvement, a flexible wear-increasing pad is provided on the inner arc surface of the semi-ring.
[0016] This utility model is a pioneering invention, and its beneficial effects are as follows: When in use, the lifting clamp of this utility model can be connected to the support base through a lifting connection structure. The product can be clamped in the space formed by the interlocking connection of two semi-rings, and held and supported by the support ring, which is supported by the support base, specifically through rolling support, thus realizing the rotation of the support ring. After the product is lifted, it can be rotated in the lifted state to adjust the product to different positions, facilitating comprehensive inspection and maintenance. Attached Figure Description
[0017] Figure 1 This is a front view of an embodiment of the lifting clamp in this utility model;
[0018] Figure 2 This is a front view of an embodiment of the lifting clamp in this utility model (with the support ring rotated 90°).
[0019] Figure 3 This is a front view of an embodiment of the lifting clamp in this utility model (support ring rotated 180°).
[0020] Figure 4 This is a front view of an embodiment of the lifting clamp in this utility model (support ring rotated 270°).
[0021] Figure 5 This is a perspective view of an embodiment of the lifting clamp in this utility model;
[0022] Figure 6 This is a perspective view of another embodiment of the lifting clamp in this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Support base; 21. Upper half ring; 22. Lower half ring; 23. Outer protrusion; 24. Through hole; 25. Clearance groove; 26. Stop edge; 3. Mandrel; 4. Rolling support body; 5. Locking hook assembly; 6. Hook engagement piece; 7. Arc-shaped pad; 8. Flexible wear-increasing pad; 9. Anti-rotation pin; 101. Hanging column; 51. Locking hook; 52. Threaded section. Detailed Implementation
[0025] To facilitate comprehensive inspection of cylindrical products, the basic technical concept of this utility model is to provide a lifting clamp with a fixed part and a self-rotating rotating part. The product is clamped on the rotating part, and the product is rotated by the relative rotation of the rotating part and the fixed part, so as to facilitate comprehensive inspection.
[0026] Based on the above concept, the present invention will be further described in detail below with reference to some embodiments.
[0027] As a most basic implementation example, such as Figures 1-6 As shown, the lifting clamp provided in this embodiment generally comprises two main parts: a support base 1 and a support ring. The support base 1 serves as the basic support for the lifting clamp and is used to connect lifting equipment. Specifically, the support base 1 has a lifting connection structure for connecting lifting equipment (such as the slings of a gantry crane). In simpler terms, the support base 1 has lifting points. The support ring, supported by the support base 1, is used to clamp the product. Specifically, the support ring comprises two semi-rings that are interlocked, and the product is clamped within the space enclosed by the interlocking semi-rings. For ease of description, let's refer to... Figure 1 Taking the state shown as an example, the two semi-rings can be defined as the upper semi-ring 21 and the lower semi-ring 22 respectively. Specifically, when lifting the product, the lifting clamps are set in pairs, and the two ends of the product are clamped by the two lifting clamps respectively, which together support the product.
[0028] It is easy to understand that in order to ensure that one end of the product can enter the internal space of the support ring, the two half rings need to be able to open. That is to say, at least one end of the upper half ring 21 and the lower half ring 22 that are connected to each other is separable, and the product can enter the enclosed space in the separated state. After the product enters the space, the two half rings are connected again to clamp the product.
[0029] The support seat 1 provides rolling support to the support ring. Specifically, as follows: Figure 1 As shown, the support ring has two rolling support bodies 4, which can rotate and jointly support the support ring, enabling the support ring to rotate and thus allowing the product to rotate. In the most basic way, two rolling support bodies 4 are provided, and the two rolling support bodies 4 should be located on both sides of a vertical plane passing through the axis of the support ring. However, in other embodiments, it is not ruled out that three or even more rolling support bodies 4 may be provided, forming a V-shaped arrangement.
[0030] The rolling support 4 can be Figure 1 The cylindrical support shown has the axis of the rolling support 4 parallel to the axis of the support ring. The support base 1 is provided with a spindle 3, and the rolling support 4 is rotatably mounted on the spindle 3 (a bearing may be used). However, the rolling support 4 may also be a spherical structure, in which case a corresponding ball socket is provided on the support base 1.
[0031] To prevent the support ring from moving axially relative to the support base 1 during use, which could cause the support ring to separate from the support base 1, the support ring and the support base 1 should be axially limited. Specifically, one of the support base 1 and the support ring is provided with a limiting structure, and the other is provided with a limiting fit structure. The limiting structure and the limiting fit structure work together to limit the axial position of the support ring and ensure normal lifting.
[0032] In this embodiment, after the product is clamped, in the lifting state, applying external force to the product or support ring causes the support ring to rotate, thereby rotating the product by a certain angle. This allows for comprehensive inspection of the product while it is lifted. Figures 1-4 For example, the product can be rotated 90 degrees each time to achieve all-round inspection and maintenance.
[0033] In a preferred embodiment, to improve the stability of the support ring during lifting, both ends of the two semi-rings, namely the upper semi-ring 21 and the lower semi-ring 22, are connected by a separable fastening structure. This allows the two semi-rings to be completely separated, enabling the product to enter the space they form. For the support base 1, a support groove is provided for the support ring to enter, such as... Figure 1As shown, the depth of the support groove is greater than the radius of the semi-ring, so that a large portion of the support ring is located within the support base 1. Simultaneously, the lifting connection structure, i.e., the lifting points, on the support base 1 are located at both ends of the top of the support base 1. This ensures that during lifting, the lifting points are actually positioned above the center of gravity of the support ring, resulting in greater stability during the lifting process. Specifically, as... Figure 5 As shown, the lifting connection structure can be a lifting column 101 set at the top of the support base 1. Of course, in other embodiments, the lifting connection structure can also be a lifting ring, etc., set at the top of the support base 1.
[0034] As an embodiment that facilitates the separation and installation of the two half-rings, the above-mentioned fastening connection structure can adopt a locking structure, such as... Figure 1 , Figure 5 and Figure 6 As shown, the locking structure specifically includes a locking hook assembly 5 and a hook engagement member 6. The locking hook assembly 5 is disposed on one of the half-rings (e.g., the upper half-ring 21), and the hook engagement member 6 is disposed on the other half-ring (e.g., the lower half-ring 22). The locking hook assembly 5 includes a locking hook seat and a swingable locking hook 51. The locking hook seat serves as the mounting base, and the locking hook assembly 5 is mounted as a whole on the corresponding half-ring. The locking hook 51 is swingably mounted on the locking hook seat, serving as a component for engaging with the hook engagement member 6 to connect the two half-rings. That is, during the swing stroke, the locking hook 51 has a locked state for engaging with the hook engagement member 6 and a separated state for separating from the hook engagement member 6.
[0035] This allows for quick separation and connection of the two half-rings by controlling the opening and closing of the locking hook 51 during product clamping and disassembly, improving efficiency. At the same time, the locking hook 51 is also relatively reliable when locked.
[0036] Furthermore, in a more preferred embodiment, such as Figure 5 and Figure 6 As shown, the locking hook 51 is a U-shaped hook with threaded sections 52 at both ends. The locking hook 51 includes through holes through which both ends of the locking hook 51 pass. The two ends of the threaded sections 52 protrude from the through holes and are connected to two nuts. One nut is located on one side of the through hole, and the other nut is located on the other side of the through hole. This allows adjustment of the extension length of the locking hook 51 relative to the locking hook seat by tightening the two nuts, thereby adjusting the preload after the two half-rings are engaged, ensuring that the product is reliably locked. It should be noted that the figure only illustrates a case with only two nuts. In other embodiments, it is not excluded that more nuts may be provided. At the most basic level, one nut is located on one side of the through hole, one nut is located on the other side of the through hole, and the other nuts serve as backup nuts.
[0037] like Figure 5 and Figure 6As shown, the limiting structure includes retaining edges 26 at both ends of the support ring along the axial direction. The two retaining edges 26 are located on the outer side of the end faces of the support base 1 along the axial direction. The end faces of the support base 1 at both ends form a limiting fit structure. That is to say, at this time, the support ring is locked on the support base 1 by the retaining edges 26 to prevent the support ring from moving axially.
[0038] It is easy to understand that in other embodiments, the position of the retaining edge 26 can also be interchanged on the support ring and the support base 1. Specifically, the two retaining edges 26 can also be provided at both ends of the support base 1 in the axial direction and located on the outer side of the end faces of both ends of the support ring in the axial direction. The end faces of both ends of the support ring form a limiting fit structure. That is to say, at this time, the support ring is stuck between the retaining edges 26 of the support base 1, which can also prevent the support ring from moving axially.
[0039] Furthermore, in a preferred embodiment, such as Figures 1-5 As shown, the lifting clamp also includes an anti-rotation component, specifically a quick-release pin, i.e., an anti-rotation pin 9. Correspondingly, taking the retaining flange 26 shown in the figure as an example on the support ring, the retaining flange 26 has multiple through holes 24. Correspondingly, the support base 1 has multiple mating holes that are coaxial with the through holes 24 when the support ring rotates to a set angle, allowing the anti-rotation component to pass through. Figures 1-4 The diagram shows the support ring maintaining its position after the anti-rotation component is inserted in four states: 0°, 90°, 180°, and 270°. Four mating holes can be provided accordingly to prevent accidental rotation of the product during maintenance, ensuring proper maintenance. Of course, the number of mating holes can be increased or decreased as needed.
[0040] Similarly, for the case where the retaining edge 26 is on the support base 1, multiple mating holes should be provided on the support ring accordingly.
[0041] Considering cost, the retaining edge 26 does not need to be too large. In some preferred embodiments, a larger through hole 24 is provided to facilitate the normal use of the anti-rotation component, such as... Figure 1 As shown, the flange 26 is provided with an outward protrusion 23, and the through hole 24 is provided on the outward protrusion 23.
[0042] It should be noted that in other embodiments, during the maintenance process, additional tools may be used to support the product in order to prevent it from rotating.
[0043] Some products may have irregular protrusions on their outer perimeter, and are not standard cylindrical. To ensure proper clamping of the product, such as... Figure 1 As shown, the upper half ring 21 and the lower half ring 22 are provided with a relief groove 25 at the center position of the ring upward, and the relief groove 25 is used to avoid protrusions on the product.
[0044] In some embodiments, to improve the versatility of the lifting clamp and make it suitable for products of different diameters, the lifting clamp further includes an arc-shaped pad 7. The arc-shaped pad 7 is used to be installed on the inner arc surface of the semi-ring. When clamping products with smaller diameters, the arc-shaped pad 7 can be added. The arc-shaped pad 7 can be forcibly inserted into the semi-ring or connected to the semi-ring using detachable fasteners.
[0045] In some other embodiments, to ensure the clamping stability of the product, such as Figure 1 As shown, a flexible friction-increasing pad 8 is provided on the inner arc surface of the semi-ring. The flexible friction-increasing pad 8 itself can be compressed, thereby increasing the friction between the semi-ring and the product, and thus minimizing the risk of the product accidentally coming out of the support ring during lifting. The flexible friction-increasing pad 8 can be made of rubber, silicone, etc.
[0046] In some other embodiments, for cylindrical products that are longer in the axial direction, two or more lifting clamps can be used at the same time and clamped at both ends of the product to ensure the stability of the product after it is lifted.
[0047] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A lifting clamp, characterized in that The device includes a support base and a support ring. The support base is provided with a lifting connection structure for connecting lifting equipment. The support ring includes two interlocking half-rings for clamping products. At least one end of the two half-rings connected to each other can be separated to allow the product to enter the space formed by the interlocking half-rings. The support base is provided with at least two self-rotating rolling supports to jointly support the support ring and enable the support ring to roll. One of the support base and the support ring is provided with a limiting structure, and the other is provided with a limiting engagement structure that cooperates with the limiting structure to limit the axial position of the support ring.
2. The hoisting clamp of claim 1, wherein, The two halves of the ring are connected by a separable fastening structure. The support base is provided with a support groove for the support ring to enter. The depth of the support groove is greater than the outer diameter of the half ring. The lifting connection structure is set at the top two ends of the support base.
3. The hoisting clamp of claim 2, wherein, The fastening connection structure includes a locking hook assembly on one half ring and a hook engagement member on the other half ring. The locking hook assembly includes a locking hook seat and a swingable locking hook. During the swing stroke of the locking hook, it has a locked state that is engaged with the hook engagement member and a separated state that is separated from the hook engagement member.
4. The hoisting clamp of claim 3, wherein, The lock hook is a U-shaped hook with threaded sections at both ends. The lock hook seat includes through holes for the two ends of the lock hook to pass through, and the threaded sections are connected to at least two nuts, at least one of which has a nut on one side of the through hole and at least one nut on the other side of the through hole.
5. A lifting clamp according to any one of claims 1-4, characterised in that The limiting structure includes retaining edges at both ends of the support ring along the axial direction, with the two retaining edges located on the outer sides of the end faces of both ends of the support seat along the axial direction, and the end faces of both ends of the support seat forming the limiting fit structure; or the limiting structure includes retaining edges at both ends of the support seat along the axial direction, with the two retaining edges located on the outer sides of the end faces of both ends of the support ring along the axial direction, and the end faces of both ends of the support ring forming the limiting fit structure.
6. The hoisting clamp of claim 5, wherein, The lifting clamp also includes an anti-rotation component. When the stop is set on the support ring, the stop has multiple through holes, and the support base has multiple mating holes that are coaxial with the through holes when the support ring rotates to a set angle so that the anti-rotation component can pass through. When the stop is set on the support base, the stop has multiple through holes, and the support ring has multiple mating holes that are coaxial with the support ring when the support ring rotates to a set angle so that the anti-rotation component can pass through.
7. The hoisting clamp of claim 6, wherein, The flange has an outward protrusion, and the through hole is located on the outward protrusion.
8. The lifting clamp of any one of claims 1-4, wherein, The semi-circular ring has a center position for avoiding protrusions on the product.
9. The lifting clamp of any one of claims 1-4, wherein, The lifting clamp also includes an arc-shaped pad for mounting on the inner arc surface of the semi-ring.
10. The lifting clamp according to any one of claims 1-4, characterized in that A flexible wear-increasing pad is provided on the inner arc surface of the semi-ring.