Adjustable crane boom spreader
By designing an adjustable clamping structure for the adjustable boom spreader, the problems of high production costs and safety hazards during tower crane boom hoisting were solved, achieving adaptability to different boom specifications and safe and stable hoisting results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUZHOU CONSTR MACHINERY
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-19
AI Technical Summary
In the existing technology, the hoisting of tower crane booms has problems of high production costs and significant safety hazards, especially the safety hazards caused by welding of lifting lugs or slippage of slings when the center of gravity of the boom changes.
Design an adjustable boom lifting device, which consists of an adjustable clamping structure composed of an upper clamping plate, a lower clamping plate, a left connector, a right connector, and a sleeve. The upper and lower spacing is adjusted by nuts and screws, and the left and right spacing is adjusted by the sleeve, so as to achieve a tight connection with the main chord of the boom.
It achieves strong adaptability to the main chord of crane booms of different specifications, reduces production costs, effectively prevents slippage of the lifting equipment, and improves the safety and stability of lifting operations.
Smart Images
Figure CN224377426U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an adjustable lifting boom, belonging to the technical field of lifting equipment. Background Technology
[0002] Lifting slings are widely used in the field of lifting equipment, mainly for lifting or dismantling materials. When hoisting a tower crane jib as a whole, there are generally two methods: 1. Installing lifting lugs on the main chord of the jib. However, when the jib has multiple jib combinations, the center of gravity of the jib will change accordingly. When the center of gravity deviation is large, lifting lugs need to be welded to each jib section, which not only greatly increases production costs but also affects the aesthetics of the jib section; 2. Using slings wrapped around the upper chord of the jib. Although the tower crane is marked with lifting point positions on the jib sections at the factory to facilitate jib hoisting, it is still difficult to guarantee the position of the lifting points. Since the slings are not fixed, they can slip on the main chord of the jib, posing a safety hazard to the personnel actually installing the crane. Utility Model Content
[0003] To overcome the shortcomings of the existing technology, this utility model provides an adjustable lifting boom spreader, solving problems such as high production costs and significant safety hazards. This spreader can be used with lifting booms of different specifications and has advantages such as easy assembly and disassembly, strong adaptability, and cost savings.
[0004] This utility model is achieved through the following technical solution: an adjustable lifting boom, characterized in that it includes an upper clamping plate, a lower clamping plate, a lifting lug, a left connecting piece, a right connecting piece, and a sleeve; the upper clamping plate and the lower clamping plate are connected by the left connecting piece and the right connecting piece, and the upper clamping plate and the lower clamping plate are connected by the left connecting piece and the right connecting piece to form opposing upper clamping plate clamping surfaces and lower clamping plate clamping surfaces; the sleeve is fitted onto the left connecting piece and the right connecting piece; and the lifting lug is welded to the upper clamping plate.
[0005] The left and right connectors are used to adjust the vertical distance between the upper clamping plate clamping surface and the lower clamping plate clamping surface, so as to adjust the vertical distance of the clamping area.
[0006] The sleeve is used to adjust the left and right distance of the clamping area.
[0007] The left and right connecting parts have the same structure, both consisting of a screw, a nut, and a washer. The distance between the clamping surfaces of the upper and lower clamping plates can be changed by adjusting the position of the nut.
[0008] The upper and lower clamping plates form an adjustable clamping structure through the left and right connecting parts, so that the lifting device is tightly connected to the main chord of the lifting boom.
[0009] The lifting lugs are used to connect slings to achieve the lifting of the crane boom.
[0010] The beneficial effects of this utility model are as follows: By adjusting the left and right connecting parts, and thus the distance between the upper and lower clamping plates, the main chord of the lifting boom can be clamped in both the upper and lower directions. By adjusting the size of the sleeve, the main chord of the lifting boom can be clamped in both the left and right directions. In this way, the lifting device and the main chord of the lifting boom can be tightly connected to form a whole. This solves the problem of welding multiple lifting lugs to the boom section when assembling the lifting boom, saving production costs and solving the safety hazard caused by the relative sliding of the lifting boom when the lifting sling is used for hoisting. Attached Figure Description
[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a reference diagram showing the usage state of this utility model;
[0014] Figure 3 yes Figure 2 Enlarged view of point A.
[0015] In the diagram: 1. Upper clamping plate; 2. Lower clamping plate; 3. Lifting lug; 4. Left connector; 5. Right connector; 6. Sleeve; 7. Upper clamping plate clamping surface; 8. Lower clamping plate clamping surface; 9. Clamping area; 10. Nut; 11. Washer; 12. Main chord of the lifting boom; 13. Screw. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0018] like Figures 1 to 3 An adjustable lifting boom lifting device is shown, including an upper clamping plate 1, a lower clamping plate 2, a lifting lug 3, a left connecting piece 4, a right connecting piece 5, and a sleeve 6; the upper clamping plate 1 and the lower clamping plate 2 are connected by the left connecting piece 4 and the right connecting piece 5, and the upper clamping plate 1 and the lower clamping plate 2 are connected by the left connecting piece 4 and the right connecting piece 5 to form opposing upper clamping plate clamping surfaces 7 and lower clamping plate clamping surfaces 8, the sleeve 6 is sleeved on the left connecting piece 4 and the right connecting piece 5, and the lifting lug 3 is welded to the upper clamping plate 1.
[0019] The left connector 4 and the right connector 5 are used to adjust the vertical distance between the upper clamping plate clamping surface 7 and the lower clamping plate clamping surface 8, so as to adjust the vertical distance of the clamping area 9.
[0020] The sleeve 6 is used to adjust the left and right distance of the clamping area 9.
[0021] The left connector 4 and the right connector 5 have the same structure, both consisting of a screw 13, a nut 10 and a washer 11. The distance between the upper clamping plate clamping surface 7 and the lower clamping plate clamping surface 8 can be changed by adjusting the position of the nut 10.
[0022] The upper clamping plate 1 and the lower clamping plate 2 form an adjustable clamping structure through the left connecting member 4 and the right connecting member 5, so that the lifting device is tightly connected to the main chord of the lifting boom 12.
[0023] The lifting lug 3 is used to connect the slings to achieve the lifting of the crane boom.
[0024] Adjustment process for the main chord of crane boom of different specifications
[0025] Adjusting up and down
[0026] When it is necessary to adjust the vertical distance of the clamping area 9, the position of the nut 10 on the screw 13 is adjusted by rotating the nut 10. For example, to increase the vertical distance, the nut 10 can be turned upwards to increase the distance between the upper clamping plate 1 and the lower clamping plate 2; to decrease the vertical distance, the nut 10 can be turned downwards to bring the two plates closer together. After adjustment, tighten the nut 10 and fix the position with the shim 11 to ensure that the distance between the clamping surface 7 of the upper clamping plate and the clamping surface 8 of the lower clamping plate remains stable.
[0027] Left and right adjustment
[0028] When the specifications of the main chord 12 of the crane boom change, requiring adjustment of the left-right distance of the clamping area 9, a sleeve 6 of different thicknesses is used. For example, if the width of the main chord 12 of the crane boom is small, a sleeve 6 with a larger thickness is selected; if the width of the main chord is large, a sleeve 6 with a smaller thickness is selected. The sleeve 6 of appropriate thickness is installed on the screw 13, so that both sides of the sleeve 6 contact the upper clamping plate 1 and the lower clamping plate 2 respectively. Thus, the left-right distance of the clamping area 9 is determined by the thickness of the sleeve 6, achieving clamping of main chords of different specifications.
[0029] hoisting operation application
[0030] When hoisting the tower crane boom, first adjust the vertical and horizontal distances of the clamping area 9 of the lifting device according to the specifications of the boom's main chord 12, following the adjustment method described above. Then, align the upper clamping plate's clamping surface 7 and the lower clamping plate's clamping surface 8 of the lifting device with the boom's main chord 12, ensuring the main chord is within the clamping area 9. Double-check that the nuts 10 are tightened and the sleeves 6 are properly installed, ensuring a tight connection between the lifting device and the boom's main chord 12. Finally, connect the slings via the lifting lugs 3 and begin the hoisting operation. During the hoisting process, because the lifting device forms a unified structure with the main chord through its adjustable clamping structure, slippage of the lifting device relative to the boom is effectively prevented, ensuring the safety and stability of the hoisting operation.
[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An adjustable lifting boom, characterized in that: It includes an upper clamping plate (1), a lower clamping plate (2), a lifting lug (3), a left connector (4), a right connector (5), and a sleeve (6); the upper clamping plate (1) and the lower clamping plate (2) are connected by the left connector (4) and the right connector (5), and the upper clamping plate (1) and the lower clamping plate (2) are connected by the left connector (4) and the right connector (5) to form opposing upper clamping plate clamping surfaces (7) and lower clamping plate clamping surfaces (8), the sleeve (6) is sleeved on the left connector (4) and the right connector (5), and the lifting lug (3) is welded to the upper clamping plate (1).
2. The adjustable lifting boom as described in claim 1, characterized in that: The left connector (4) and right connector (5) are used to adjust the vertical distance between the upper clamping plate clamping surface (7) and the lower clamping plate clamping surface (8) to adjust the vertical distance of the clamping area (9).
3. The adjustable lifting boom as described in claim 1, characterized in that: The sleeve (6) is used to adjust the left and right distance of the clamping area (9).
4. The adjustable lifting boom as described in claim 1, characterized in that: The left connector (4) and the right connector (5) have the same structure, both consisting of a screw (13), a nut (10) and a washer (11). The distance between the upper clamping plate clamping surface (7) and the lower clamping plate clamping surface (8) can be changed by adjusting the position of the nut (10).
5. The adjustable lifting boom as described in claim 1, characterized in that: The upper clamping plate (1) and the lower clamping plate (2) form an adjustable clamping structure through the left connector (4) and the right connector (5), so that the lifting device is tightly connected to the main chord of the lifting arm (12).
6. The adjustable lifting boom as described in claim 1, characterized in that: The lifting lug (3) is used to connect the slings to achieve the lifting of the boom.