Adjustable lifting hook anti-rope-falling protection device of tower crane
By designing an adjustable hook anti-rope protection device, the problem of single adaptability of traditional devices is solved, and the adaptation and convenient maintenance of multiple hook size hooks is achieved.
Patent Information
- Application Number
- CN202422205783.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing hook anti-rope protection device has a single adaptability and cannot be used interchangeably, resulting in many spare parts and low maintenance efficiency.
An adjustable hook anti-rope protection device is designed, including an adjustable gear ring and adjustable weight parts. The width and length are adjusted through the adjustment parts to accommodate different hook size hooks. The double-head internal thread adjustment sleeve and the outer hexagonal sleeve are fixed to achieve combined splicing maintenance.
The adaptation of a variety of hook size hooks has been achieved, reducing the need for spare parts and improving the convenience and timeliness of maintenance.
Smart Images
Figure CN223188790U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lifting equipment, in particular to an adjustable hook anti-rope-off protection device for a tower crane. Background Art
[0002] Hook anti-rope release devices are a crucial safety feature of lifting machinery. Currently, there are two basic types of anti-rope release devices used on conventional tower cranes: the tongue spring type with automatic return and the deadweight type. The tongue spring type relies on the elastic force of helical return springs on either side of the pin to automatically return the tongue to its original position when compressed, thereby closing the hook opening. The deadweight type, on the other hand, relies on two U-shaped rings with different lengths or diameters, each with different counterweights. Through the lever principle, the heavier end of the counterweight automatically returns to its original position under the action of deadweight, closing the hook opening.
[0003] After long-term work practice, it was found that the two common types of hook safety can only be used with the opening size of the hook with the corresponding hook number. The application range is relatively small, and they cannot be used interchangeably when facing hooks of different sizes. The working conditions at the lifting machinery operation site are relatively harsh, and improper lifting operations can easily cause damage to the hook safety. The hook safety is a consumable part. Due to the different hook numbers, the current hook safety design requires a large number of different accessories. The hook safety is also an important safety protection device and needs to be repaired immediately if damaged. Therefore, it is necessary to design a hook anti-rope protection device that can be used with hooks of multiple hook numbers and has a wider adaptability to meet the needs of timely and accurate maintenance services. Utility Model Content
[0004] The purpose of the present invention is to solve, at least to a certain extent, the problems of single adaptability, many spare parts and low maintenance efficiency of the hook anti-rope protection device. In view of this, an adjustable hook anti-rope protection device for a tower crane is provided, comprising: a pin shaft, rotatably mounted on the hook; an adjustable retaining ring, detachably fixed on the pin shaft and arranged at the hook mouth on the inner side of the hook, the adjustable retaining ring comprising a first retaining rod, a second retaining rod and a first adjusting member; one end of the first retaining rod and the second retaining rod are respectively fixed on the pin shaft, and the first adjusting member is used to connect the first retaining rod and the other end of the second gear rod and can adjust the distance between the first gear rod and the second gear rod in a direction parallel to the pin axis; a counterweight piece, which is detachably fixed on the adjustable retaining ring and is arranged on the outside of the hook, and the weight of the counterweight piece is greater than the weight of the adjustable retaining ring, and the counterweight piece includes a first counterweight rod, a second counterweight rod and a second adjusting piece; one end of the first counterweight rod and the second counterweight rod is respectively fixed on the pin axis, and the second adjusting piece is used to connect the other end of the first counterweight rod and the second counterweight rod and can adjust the distance between the first counterweight rod and the second counterweight rod in a direction parallel to the pin axis.
[0005] According to an example of the present invention, the first gear rod is connected to the pin shaft through the third adjusting member and the first straight rod in sequence, and the second gear rod is connected to the pin shaft through the fourth adjusting member and the second straight rod in sequence; the third adjusting member is used to adjust the distance between the first gear rod and the first straight rod in the direction perpendicular to the pin shaft, and the fourth adjusting member is used to adjust the distance between the second gear rod and the second straight rod in the direction perpendicular to the pin shaft.
[0006] According to an example of the present invention, the first baffle rod and the second baffle rod are both "L"-shaped double-ended screw rods, the first counterweight rod and the second counterweight rod are both "L"-shaped single-ended screw rods, the first straight rod and the second straight rod are linear single-ended screw rods, and the first adjusting member, the second adjusting member, the third adjusting member and the fourth adjusting member are all double-ended internally threaded adjusting sleeves.
[0007] According to an example of the present invention, the connection points of the first counterweight rod, the second counterweight rod and the pin on the counterweight member are located inside the connection points of the first straight rod, the second straight rod and the pin on the adjustable retaining ring.
[0008] According to an example of the present invention, two short sleeves are further included, and the short sleeves are respectively sleeved on the pins between the hook and the end of the corresponding counterweight.
[0009] According to an example of the present utility model, an outer circle inner hexagonal sleeve is welded to the end of the first counterweight rod and the second counterweight rod, and the end of the first straight rod and the second straight rod away from the threaded end, and the two ends of the pin shaft are respectively sleeved with an inner circle outer hexagonal sleeve located outside the short sleeve, and the outer circle inner hexagonal sleeves at the ends of the first counterweight rod and the second counterweight rod, the first straight rod and the second straight rod are sleeved on the corresponding inner circle outer hexagonal sleeves.
[0010] According to an example of the present invention, a cotter pin is respectively passed through and fixed at both ends of the pin shaft.
[0011] According to an example of the present invention, both ends of the pin shaft are respectively sleeved with a flat washer located on the inner side of the cotter pin.
[0012] Compared with the prior art, the technical solution of the utility model has the following advantages:
[0013] 1. The improved design of the present application is an adjustable hook anti-rope-off protection device suitable for tower cranes, which is a self-weight hook safety. The retaining ring part assembled at the opening part inside the hook is designed to be a width-adjustable retaining ring, and the counterweight part on the outside of the hook is also synchronously designed to be a width-adjustable counterweight structure. When in use, the first adjusting part and the second adjusting part can be operated to synchronously adjust the width size of the adjustable retaining ring and the counterweight part according to the diameter size of the hook neck position of different hook numbers. This design can effectively solve the problem that the traditional hook anti-rope-off protection device has a single adaptability and cannot be used interchangeably, and has a wider range of application scenarios.
[0014] 2. By operating the third adjusting member and the fourth adjusting member, the length of the adjustable block perpendicular to the pin axis can be adjusted synchronously, thereby adjusting the length of the opening direction of the hook anti-rope-off protection device to adapt to the opening size of hooks with different hook numbers.
[0015] 3. In order to prevent the adjustable retaining ring or counterweight from rotating independently in the split-type hook safety, the present application designs welding outer circle and inner hexagonal sleeves at both ends, and adapts the installation of inner circle and outer hexagonal sleeves to firmly fix them on the pin shaft.
[0016] 4. The double-headed internal thread adjustment sleeve is used for adjustable design. The overall versatility of the hook safety is good and the spare parts are reduced. It can optimize the limitation of the existing hook safety that must be replaced as a whole when accidentally deformed or damaged. Through the combination splicing method, as long as the setting position of the left and right threads is clear, once individual parts are damaged or deformed, they can be replaced in time by simple disassembly, and maintenance is more timely and convenient. As long as the accessories are placed on the construction site, timely and accurate maintenance services can be provided for multiple lifting machinery.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 The utility model is a structural diagram of an adjustable hook anti-rope-off protection device with a hook for a tower crane according to an embodiment of the present invention.
[0020] Figure 2 yes Figure 1 Exploded view of the structure shown.
[0021] Figure 3 The utility model is a structural diagram of an adjustable hook anti-rope-off protection device for a tower crane according to an embodiment of the present invention.
[0022] Figure 4 yes Figure 2 Exploded view of the structure shown.
[0023] Among them, the figures are marked as: 1. pin, 2. hook, 3. first gear rod, 4. second gear rod, 5. first adjusting member, 6. first counterweight rod, 7. second counterweight rod, 8. second adjusting member, 9. third adjusting member, 10. first straight rod, 11. fourth adjusting member, 12. second straight rod, 13. short sleeve, 14. outer circle and inner hexagonal sleeve, 15. inner circle and outer hexagonal sleeve, 16. cotter pin, 17. flat washer. DETAILED DESCRIPTION
[0024] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. Example
[0025] See also Figures 1 to 4As shown, the utility model provides an adjustable hook anti-rope-off protection device for a tower crane, comprising: a pin shaft 1, rotatably mounted on a hook 2; an adjustable retaining ring, detachably fixed to the pin shaft 1 and arranged at the hook opening on the inner side of the hook 2, the adjustable retaining ring comprising a first retaining rod 3, a second retaining rod 4 and a first adjusting member 5; one end of the first retaining rod 3 and the second retaining rod 4 are respectively fixed to the pin shaft 1, and the first adjusting member 5 is used to connect the other ends of the first retaining rod 3 and the second retaining rod 4 and can adjust the first retaining rod in a direction parallel to the pin shaft 1. The distance between the rod 3 and the second baffle rod 4; the counterweight piece is detachably fixed on the adjustable baffle ring and is arranged on the side of the hook 2, and the weight of the counterweight piece is greater than the weight of the adjustable baffle ring. In this embodiment, the counterweight piece includes a first counterweight rod 6, a second counterweight rod 7 and a second adjusting piece 8; one end of the first counterweight rod 6 and the second counterweight rod 7 are respectively fixed on the pin shaft 1, and the second adjusting piece 8 is used to connect the other end of the first counterweight rod 6 and the second counterweight rod 7 and can adjust the distance between the first counterweight rod 6 and the second counterweight rod 7 in a direction parallel to the pin shaft 1.
[0026] The improved design of the present application is an adjustable hook anti-rope-off protection device suitable for tower cranes, which is a self-weight type hook safety. In the absence of external interference, one end of the counterweight falls under the action of its own weight, causing one end of the adjustable retaining ring to tilt and seal the opening of the hook. In this embodiment, the retaining ring portion assembled at the inner opening of the hook 2 is designed to be a width-adjustable retaining ring, and the counterweight on the outside of the hook is also synchronously designed to be a width-adjustable counterweight structure. When in use, the first adjusting member 5 and the second adjusting member 8 can be operated to synchronously adjust the width dimensions of the adjustable retaining ring and the counterweight according to the diameter size of the hook neck position of different hook numbers for adaptation. This design can effectively solve the problem that traditional hook anti-rope-off protection devices have a single adaptability and cannot be used interchangeably, and have a wider range of application scenarios.
[0027] According to an example of the present utility model, the first gear rod 3 is connected to the pin shaft 1 in sequence through the third adjusting member 9 and the first straight rod 10, and the second gear rod 4 is connected to the pin shaft 1 in sequence through the fourth adjusting member 11 and the second straight rod 12; the third adjusting member 9 is used to adjust the distance between the first gear rod 3 and the first straight rod 10 in the direction perpendicular to the pin shaft 1, and the fourth adjusting member 11 is used to adjust the distance between the second gear rod 4 and the second straight rod 12 in the direction perpendicular to the pin shaft 1.
[0028] By operating the third adjusting member 9 and the fourth adjusting member 11, the length of the adjustable block perpendicular to the pin shaft 1 can be adjusted synchronously, thereby adjusting the length of the opening direction of the hook anti-rope-off protection device to adapt to the opening size of hooks with different hook numbers.
[0029] As one of the design forms, in this embodiment, a double-ended threaded sleeve is used to adjust the length or width of the corresponding components. The first gear rod 3 and the second gear rod 4 are both "L"-shaped double-ended screws, the first counterweight rod 6 and the second counterweight rod 7 are both "L"-shaped single-ended screws, the first straight rod 10 and the second straight rod 12 are straight single-ended screws, and the first adjusting member 5, the second adjusting member 8, the third adjusting member 9 and the fourth adjusting member 11 are all double-ended internally threaded adjustment sleeves.
[0030] The double-headed internal threaded adjustment sleeve is used for the adjustable design. The hook safety has good overall versatility and reduced spare parts. It can optimize the limitation of the existing hook safety that must be replaced as a whole when accidentally deformed or damaged. Through the combination splicing method, as long as the setting position of the left and right threads is clearly defined, once individual parts are damaged or deformed, they can be replaced in time with spare parts through simple disassembly, making maintenance more timely and convenient. As long as the accessories are placed at the construction site, timely and accurate maintenance services can be provided for multiple lifting machinery.
[0031] According to an example of the present invention, the connection points of the first counterweight rod 6, the second counterweight rod 7 and the pin 1 on the counterweight are located on the inner side of the connection points of the first straight rod 10, the second straight rod 12 and the pin 1 on the adjustable retaining ring, so that the fixed points of the counterweight and the adjustable retaining ring on the pin are staggered, which makes it more convenient to adjust the size and replace parts.
[0032] According to an example of the present invention, the device also includes two short sleeves 13, which are respectively mounted on the pin shaft 1 between the hook 2 and the corresponding counterweight end to laterally limit the hook 2, thereby preventing the entire protective device from moving laterally relative to the hook 2.
[0033] According to an example of the present utility model, an outer circular hexagonal sleeve 14 is welded to the end of the first counterweight rod 6 and the second counterweight rod 7, the first straight rod 10 and the second straight rod 12 away from the threaded end, and the two ends of the pin shaft 1 are respectively sleeved with an inner circular hexagonal sleeve 15 located outside the short sleeve 13, and the outer circular hexagonal sleeves 14 at the ends of the first counterweight rod 6 and the second counterweight rod 7, the first straight rod 10 and the second straight rod 12 are sleeved on the corresponding inner circular hexagonal sleeves.
[0034] In order to prevent the adjustable retaining ring or counterweight from rotating independently in the split-type hook safety, the present application designs an outer circle and inner hexagonal sleeve 14 to be welded at both ends, and an inner circle and outer hexagonal sleeve 15 is installed to be firmly fixed on the pin shaft 1.
[0035] Preferably, a cotter pin 16 is respectively passed through and fixed at both ends of the pin shaft 1 to prevent the parts from moving outward. A flat washer 17 is also respectively sleeved on both ends of the pin shaft 1 and is located on the inner side of the cotter pin 16 and between the cotter pin 16 and the inner circle and outer hexagonal sleeve 15, which can increase the contact area and disperse the pressure.
[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.
[0037] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.
[0039] Various changes and modifications will undoubtedly become apparent to those skilled in the art after reading the above description. Therefore, the appended claims should be construed to encompass all changes and modifications within the true intent and scope of the present invention. Any and all equivalents within the scope of the claims should be considered to be within the intent and scope of the present invention.
Claims
1. A tower crane adjustable hook anti-rope-off protection device, characterized in that: include: A pin (1) is rotatably mounted on the hook (2); An adjustable retaining ring is detachably fixed on the pin shaft (1) and is arranged at the inner hook mouth of the hook (2), and the adjustable retaining ring includes a first retaining rod (3), a second retaining rod (4) and a first adjusting member (5); one end of the first retaining rod (3) and the second retaining rod (4) are respectively fixed on the pin shaft (1), and the first adjusting member (5) is used to connect the other ends of the first retaining rod (3) and the second retaining rod (4) and can adjust the distance between the first retaining rod (3) and the second retaining rod (4) in a direction parallel to the pin shaft (1); A counterweight is detachably fixed on the adjustable retaining ring and is arranged outside the hook (2); the weight of the counterweight is greater than the weight of the adjustable retaining ring, and the counterweight comprises a first counterweight rod (6), a second counterweight rod (7) and a second adjusting member (8); one end of the first counterweight rod (6) and the second counterweight rod (7) are respectively fixed on the pin (1); the second adjusting member (8) is used to connect the other ends of the first counterweight rod (6) and the second counterweight rod (7) and can adjust the distance between the first counterweight rod (6) and the second counterweight rod (7) in a direction parallel to the pin (1).
2. The adjustable hook anti-rope-off protection device for a tower crane according to claim 1, characterized in that: The first baffle (3) is connected to the pin shaft (1) in sequence through the third adjusting member (9) and the first straight rod (10), and the second baffle (4) is connected to the pin shaft (1) in sequence through the fourth adjusting member (11) and the second straight rod (12); the third adjusting member (9) is used to adjust the distance between the first baffle (3) and the first straight rod (10) in a direction perpendicular to the pin shaft (1), and the fourth adjusting member (11) is used to adjust the distance between the second baffle (4) and the second straight rod (12) in a direction perpendicular to the pin shaft (1).
3. The adjustable hook anti-rope-off protection device for a tower crane according to claim 2, characterized in that: The first baffle rod (3) and the second baffle rod (4) are both "L"-shaped double-ended screw rods, the first counterweight rod (6) and the second counterweight rod (7) are both "L"-shaped single-ended screw rods, the first straight rod (10) and the second straight rod (12) are linear single-ended screw rods, and the first adjusting member (5), the second adjusting member (8), the third adjusting member (9) and the fourth adjusting member (11) are all double-ended internally threaded adjusting sleeves.
4. The adjustable hook anti-rope-off protection device for a tower crane according to claim 2, characterized in that: The connection points of the first counterweight rod (6), the second counterweight rod (7) and the pin shaft (1) on the counterweight member are located inside the connection points of the first straight rod (10), the second straight rod (12) and the pin shaft (1) on the adjustable retaining ring.
5. The adjustable hook anti-rope-off protection device for a tower crane according to claim 4, characterized in that: It also includes two short sleeves (13), which are respectively sleeved on the pin shaft (1) between the hook (2) and the end of the corresponding counterweight.
6. The adjustable hook anti-rope-off protection device for a tower crane according to claim 5, characterized in that: An outer hexagonal sleeve (14) is welded to one end of each of the first counterweight rod (6), the second counterweight rod (7), the first straight rod (10), and the second straight rod (12) away from the threaded end. An inner hexagonal sleeve (15) located outside the short sleeve (13) is sleeved on each of the two ends of the pin shaft (1). The outer hexagonal sleeves (14) at the ends of the first counterweight rod (6), the second counterweight rod (7), the first straight rod (10), and the second straight rod (12) are sleeved on the corresponding inner hexagonal sleeves (15).
7. The adjustable hook anti-rope-off protection device for a tower crane according to claim 6, characterized in that: A cotter pin (16) is respectively passed through and fixed on both ends of the pin shaft (1).
8. The adjustable hook anti-rope-off protection device for a tower crane according to claim 7, characterized in that: Both ends of the pin shaft (1) are sleeved with a flat washer (17) located inside the cotter pin (16).