Lifting hook and crane

Abstract

The utility model relates to a lifting hook which comprises two yoke plate assemblies, a lifting rod and a lifting rod, the pulley block comprises a pulley, the pulley block is installed on the yoke plate, and the pulley is arranged between the two yoke plate assemblies; the yoke plate assemblies are installed on the base, the hook head assemblies are installed on the yoke plate assemblies, the hook head assemblies comprise hook heads, and the hook heads are arranged between the two yoke plate assemblies; and the weighing assembly is installed on the yoke plate assembly, the weighing assembly is located between the pulley block and the hook head assembly, and the weighing assembly is used for measuring the weight of goods suspended by the lifting hook. The utility model relates to a crane, the crane and the lifting hook, which can realize accurate metering without influencing the lifting height of the crane.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment lifting devices, specifically a hook. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range; it is also known as an overhead crane, gantry crane, or hoist. A hook is a component that is directly suspended from a lifting device to complete the lifting in one go. Due to its advantages such as ease of use, space-saving design, and low price, hooks are very suitable for use in industries such as metallurgy, building materials, warehousing, and docks.

[0003] However, with the development of the logistics industry, the torque limiter built into the crane is usually used for logistics settlement or driver and worker wage calculation. However, the torque limiter has low statistical accuracy (±5%), which cannot meet the requirements of accurate measurement. In situations where accurate measurement is required, an accurate measuring hook scale is often added to the traditional hook. Although accurate measurement is achieved, the crane needs to reduce its lifting height due to the height of the hook scale itself. If the lifting height of the crane itself is not affected, the overall height of the machine needs to be increased, which increases the overall manufacturing cost of the machine.

[0004] Therefore, how to provide a hook that can accurately measure without affecting the lifting height of the crane is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a hook and crane that can achieve accurate measurement without affecting the lifting height of the crane.

[0006] The technical solution of this utility model is as follows:

[0007] A lifting hook includes: a yoke assembly, two yoke assemblies disposed opposite to each other; a pulley block including pulleys, the pulley block being mounted on the yoke and the pulleys being positioned between the two yoke assemblies; a hook head assembly mounted on the yoke assembly, the hook head assembly including a hook head being positioned between the two yoke assemblies; and a weighing component mounted on the yoke assembly, the weighing component being located between the pulley block and the hook head assembly, the weighing component being used to measure the weight of the cargo lifted by the lifting hook.

[0008] Preferably, the yoke assembly includes a first yoke and a second yoke, the first yoke and the second yoke partially overlap, the pulley group is disposed on the first yoke, the hook assembly is disposed on the second yoke, and the weighing assembly is disposed on the first yoke and the second yoke.

[0009] Preferably, the weighing assembly includes: a pin sensor that passes through the first yoke and the second yoke; and a clamping bolt that cooperates with the pin sensor to detachably install the pin sensor onto the first yoke and the second yoke.

[0010] Preferably, the weighing component includes: a first sleeve, which is sleeved on the pin sensor, and is positioned between two second yoke plates, with its two ends abutting against the second yoke plates respectively.

[0011] Preferably, the hook assembly includes: a first support shaft that passes through the second yoke plate, and the upper part of the hook passing through the first support shaft radially; and a first bearing, the upper part of the hook being detachably connected to the first bearing via a first nut.

[0012] Preferably, the yoke assembly includes a third yoke; the weighing assembly includes a plate sensor, with two plate sensors respectively placed inside the third yoke and arranged opposite to each other; and a connecting pin that passes through the third yoke and the plate sensor along its axial direction.

[0013] Preferably, the weighing component includes: a second sleeve, which is sleeved on the connecting pin and positioned between the plate sensors, with both ends abutting against the plate sensors respectively.

[0014] Preferably, the hook assembly includes: a second support shaft that extends transversely through the plate sensor, and the upper part of the hook passing radially through the second support shaft; and a second bearing, the upper part of the hook being detachably connected to the second bearing via a second nut.

[0015] Preferably, the pulley assembly includes a pulley shaft that extends transversely through the yoke assembly along its axial direction, a third sleeve is fitted on the pulley shaft, and the pulley is fitted on the pulley shaft.

[0016] A crane comprising the hook described above.

[0017] This application provides a hook and crane, a yoke assembly, two yoke assemblies arranged opposite each other; a pulley block, including pulleys, mounted on the yoke and positioned between the two yoke assemblies; a hook assembly, mounted on the yoke assembly and including a hook head positioned between the two yoke assemblies; and a weighing component, mounted on the yoke assembly and located between the pulley block and the hook assembly, used to measure the weight of the load lifted by the hook. Compared with the prior art, the technical solution provided in this application utilizes the inherent structural gaps between the pulley block, hook assembly, and yoke assembly to place the weighing component within this space, avoiding the increased height space occupation caused by traditional external installations. This allows for accurate hook measurement without increasing or affecting the crane's lifting height. By installing the weighing component in a semi-enclosed manner within the yoke assembly, its local stress weighing coefficient is reduced by more than 40%, reducing the risk of breakage and significantly extending the service life of the hook. Eliminate the nonlinear error caused by bending moment in traditional side-mounted metering components and improve the measurement accuracy of hooks. Attached Figure Description

[0018] Figure 1 A cross-sectional view of the hook according to Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the hook structure in this utility model;

[0020] Figure 3 This is a cross-sectional view of a hook according to another embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the hook structure in this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Yoke assembly; 11. First yoke; 12. Second yoke; 13. Third yoke; 2. Pulley block; 21. Pulley; 22. Pulley shaft; 23. Third sleeve; 3. Hook assembly; 31. Hook; 32. First support shaft; 33. First bearing; 34. Second support shaft; 35. Second bearing; 36. First nut; 37. Second nut; 4. Weighing assembly; 41. Pin sensor; 42. Clamping bolt; 43. First sleeve; 44. Plate sensor; 45. Connecting pin; 46. Second sleeve; 5. Wireless data terminal. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0025] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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.

[0026] Figures 1 to 4 As shown, this utility model provides a hook, a yoke assembly 1, two yoke assemblies 1 arranged opposite each other; a pulley block 2, the pulley block 2 including pulleys 21, the pulley block 2 mounted on the yoke, the pulleys 21 positioned between the two yoke assemblies 1; a hook head assembly 3, the hook head assembly 3 mounted on the yoke assembly 1, the hook head assembly 3 including hooks 31 positioned between the two yoke assemblies 1; and a weighing component 4, the weighing component 4 mounted on the yoke assembly 1, located between the pulley block 2 and the hook head assembly 3, the weighing component 4 being used to measure the weight of the cargo lifted by the hook. Compared with the prior art, the technical solution provided in this application mainly demonstrates its technical superiority in the following three aspects:

[0027] First, by utilizing the inherent structural gaps between the pulley block 2, hook assembly 3, and yoke assembly 1, the weighing component 4 is placed within this space, avoiding the increased height space occupied by traditional external installations. This allows for accurate weighing by the hook without increasing or affecting the crane's lifting height.

[0028] Second, a parameterized model of the hook body is constructed through finite element analysis to optimize the installation positions of the two pulley blocks, the hook head 31, and the weighing component 4. Tests show that the technical solution adopted in this application, which places the weighing component 4 between the two pulley blocks and the hook head assembly 3, and installs the weighing component 4 in a semi-enclosed manner inside the yoke assembly 1, reduces the local stress weighing coefficient by more than 40%, reduces the risk of breakage, and greatly improves the service life of the hook.

[0029] Third, the two yoke plate assemblies 1 are arranged opposite each other, which is a double support structure. The metering component is embedded between the pulley block 2 and the hook assembly 3. The conversion path of axial tension and shear force is optimized through the hinged torque transmission mechanism, which eliminates the nonlinear error caused by bending moment in the traditional side-mounted metering component. It can be seen that the technical solution provided in this application can improve the measurement accuracy of the hook.

[0030] The yoke assembly 1 includes a first yoke 11 and a second yoke 12, which partially overlap. A pulley block 2 is mounted on the first yoke 11, a hook assembly 3 is mounted on the second yoke 12, and a weighing assembly 4 is mounted on both the first yoke 11 and the second yoke 12. This stepped overlapping structure of the first yoke 11 and the second yoke 12 improves load distribution uniformity compared to traditional integral yoke structures. Furthermore, a V-shaped guide groove (angle 60°±5°) can be provided at the contact surface of the first yoke 11 and the second yoke 12, and pre-tightening can form a friction-shear composite force transmission mechanism, further improving load distribution uniformity compared to traditional integral yoke structures.

[0031] On the other hand, by adopting this stepped overlapping structure of the first yoke plate 11 and the second yoke plate 12, the total height of the hook can be further reduced to 80% of that of the traditional design, while still meeting the requirements for the maximum lifting height.

[0032] The weighing assembly 4 includes a pin sensor 41 that traverses the first yoke plate 11 and the second yoke plate 12, and a retaining bolt 42 that engages with the pin sensor 41 to detachably mount the pin sensor 41 onto the first yoke plate 11 and the second yoke plate 12. The pin sensor 41, as the core force transmission component, traverses the first yoke plate 11 and the second yoke plate 12, forming a layered mechanical transmission structure. Further, by employing a transition fit between the pin sensor 41 and the first yoke plate 11 and the second yoke plate 12, uniform axial load distribution can be ensured. On the other hand, the pin sensor 41 is rigidly connected to the first yoke plate 11 and the second yoke plate 12 via the retaining bolt 42. If a tapered washer is provided at the head of the retaining bolt 42, the contact pressure on the mounting surface can be further increased, effectively suppressing signal noise caused by vibration.

[0033] Meanwhile, the pin sensor 41 is positioned on the core path of force transmission, enabling direct measurement of the axial load on the hook. This eliminates the 5%-8% nonlinear error caused by the lever effect in traditional side-mounted weighing methods, thus improving the weighing accuracy of the hook. Furthermore, this configuration allows for easy disassembly of the pin sensor 41, enabling quick assembly and disassembly, significantly reducing maintenance time compared to traditional side-mounted mechanisms.

[0034] The specific working process of the hook weighing system is as follows: when the hook lifts a load through the hook assembly 3 and the second yoke 12, the weight of the load is transferred to the pin sensor 41. The pin sensor 41 transmits the data to the wireless data terminal 5, and then transmits the load data to the ground wireless data terminal 5. The ground wireless data terminal 5 displays the load weight, achieving accurate weighing. The ground wireless data terminal 5 has a printer function and can print the weight data for logistics settlement or driver wage settlement.

[0035] In the embodiments provided in this application, the weighing component 4 includes a first sleeve 43, which is disposed on the pin sensor 41 and positioned between two second yoke plates 12, with both ends abutting against the second yoke plates 12 respectively. The first sleeve 43 serves as a rigid outer shell, providing triple protection for the internal pin sensor 41: first, mechanical protection, as the first sleeve 43 can withstand 80% of impact loads (e.g., sudden stops or swaying of heavy objects); second, environmental sealing, providing a relatively sealed working environment for the pin sensor 41, effectively preventing the intrusion of salt spray and dust; and third, temperature buffering, as thermally conductive silicone can be filled between the first sleeve 43 and the pin sensor 41 to attenuate most of the external temperature fluctuations.

[0036] In the embodiments provided in this application, the hook assembly 3 includes: a first support shaft 32, which passes through the second yoke plate 12; the upper part of the hook 31 passes through the first support shaft 32 radially; and a first bearing 33. The upper part of the hook 31 is detachably connected to the first bearing 33 via a first nut 36. The first support shaft 32, as the core force transmission component, passes through the second yoke plate 12, while the upper part of the hook 31 adopts a split structure, passes through the first support shaft 32 radially, and cooperates with the first bearing 33. Through the pre-tightening fit of the first bearing 33, the lifting load is converted into a pure radial force of the shaft-bearing system through geometric constraints, eliminating the bending moment interference of traditional pin connections.

[0037] The weighing method provided in this application is as follows: the yoke assembly 1 includes a third yoke 13, and the weighing assembly 4 includes plate sensors 44. Two plate sensors 44 are respectively placed inside the third yoke 13 and arranged opposite to each other. The weighing assembly 4 also includes a connecting pin 45, which passes through the third yoke 13 and the plate sensors 44 along its axial direction. The third yoke 13, as the core load-bearing structure, preferably has symmetrical grooves on its inner side for embedding the plate sensors 44. The two plate sensors 44 are mirror-distributed with the centerline of the third yoke 13 as a reference to eliminate lateral bending moment interference and improve the accuracy of the weighing reference component. Simultaneously, the connecting pin 45 axially passes through the third yoke 13 and the plate sensors 44, preferably forming a rigid connection through an interference fit. The load transfer path is: suspended weight—hook 31—connecting pin 45—third yoke 13—plate sensor 44, reducing the loss of intermediate forces in traditional structures.

[0038] In the embodiments provided in this application, the weighing component 4 includes a second sleeve 46, which is sleeved on the connecting pin 45 and positioned between plate sensors 44, with both ends abutting against the plate sensors 44 respectively. Preferably, the second sleeve 46 can be tightly fitted onto the surface of the connecting pin 45 through a heat-fitting process to form a rigid load transfer. When lifting heavy objects on the hook, the load transfer path is: lifted object—hook head 31—connecting pin 45—second sleeve 46—plate sensor 44.

[0039] The hook assembly 3 includes a second support shaft 34 that passes through the plate sensor 44. The upper part of the hook 31 passes radially through the second support shaft 34 and also includes a second bearing 35. The upper part of the hook 31 is detachably connected to the second bearing 35 via a second nut 37. The second support shaft 34, as the core force transmission component, passes through the plate sensor 44, forming a structure of second support shaft 34—plate sensor 44. Preferably, the upper part of the hook 31 passes radially through the second support shaft 34 and is interference-fitted with the second support shaft 34, converting the lifting load into a pure radial force and eliminating the bending moment interference of traditional pin connections.

[0040] In the embodiments provided in this application, the pulley assembly includes a pulley shaft 22, which extends axially through the yoke assembly 1. A third sleeve 23 is fitted onto the pulley shaft 22, and a pulley 21 is fitted onto the pulley shaft 22. Preferably, the third sleeve 23 is tightly fitted onto the outer surface of the pulley shaft 22 using a heat-fitting process, converting the tension of the wire rope into a uniformly distributed radial pressure, thus reducing the wear rate of the journal. Alternatively, the pulley assembly can be designed as a split unit, with the third sleeve 23 and the pulley shaft 22 having an interference fit, and the pulley 21 fixed by a tapered locating pin, enabling rapid disassembly within 30 minutes.

[0041] In the embodiments provided in this application, a crane includes any of the hooks described in the above embodiments, and this crane also possesses the technical advantages of the hooks described above.

[0042] The embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hook, characterized in that The utility model relates to a kind of crane hook, including: Yoke plate assembly (1), two the yoke plate assembly (1) is oppositely arranged; Pulley block (2), the pulley block (2) includes pulley (21), the pulley block (2) is installed on the yoke plate, the pulley (21) is placed between two the yoke plate assembly (1); Hook head assembly (3), the hook head assembly (3) is installed on the yoke plate assembly (1), the hook head assembly (3) includes hook head (31), the hook head (31) is placed between two the yoke plate assembly (1); Weight measuring assembly (4), the weight measuring assembly (4) is installed on the yoke plate assembly (1), the weight measuring assembly (4) is located between the pulley block (2) and the hook head assembly (3), and the weight measuring assembly (4) is used to measure the weight of goods of the hook hoist load.

2. The hook of claim 1, wherein The yoke plate assembly (1) includes first yoke plate (11) and second yoke plate (12), the first yoke plate (11) is partially overlapped with the second yoke plate (12), the pulley block (2) is arranged on the first yoke plate (11), the hook head assembly (3) is arranged on the second yoke plate (12), and the weight measuring assembly (4) is arranged on the first yoke plate (11) and the second yoke plate (12).

3. The hook of claim 2, wherein, The weight measuring assembly (4) includes: The weight measuring assembly (4) includes pin shaft sensor (41), and the pin shaft sensor (41) traverses the first yoke plate (11) and the second yoke plate (12); Clamping plate bolt (42), the clamping plate bolt (42) cooperates with the pin shaft sensor (41), and the pin shaft sensor (41) is detachably installed on the first yoke plate (11) and the second yoke plate (12).

4. The hook of claim 3, wherein The weight measuring assembly (4) includes: First sleeve (43), the first sleeve (43) is sleeved on the pin shaft sensor (41), the first sleeve (43) is placed between two the second yoke plate (12), and two ends are respectively abutted with the second yoke plate (12).

5. The hook of claim 4, wherein The hook head assembly (3) includes: First support shaft (32), the first support shaft (32) traverses the second yoke plate (12), and the upper portion of the hook head (31) passes through the first support shaft (32) along the radial direction of the first support shaft (32); First bearing (33), the upper portion of the hook head (31) is detachably connected with the first bearing (33) through first nut (36).

6. The hook of claim 1, wherein The yoke plate assembly (1) includes third yoke plate (13); The weight measuring assembly (4) includes plate sensor (44), two plate sensors (44) are respectively placed on the inner side of the third yoke plate (13) and oppositely arranged; Connecting pin shaft (45), the connecting pin shaft (45) traverses the third yoke plate (13) and the plate sensor (44) along its axial direction.

7. A hook according to claim 6, characterised in that The weight measuring assembly (4) includes: Second sleeve (46), the second sleeve (46) is sleeved on the connecting pin shaft (45), the second sleeve (46) is placed between the plate sensor (44), and two ends are respectively abutted with the plate sensor (44).

8. A hook according to claim 7, characterised in that The hook head assembly (3) includes: A second support shaft (34) crosses the plate sensor (44), the upper part of the hook head (31) passing through the second support shaft (34) in the radial direction of the second support shaft (34); A second bearing (35) is detachably connected with the upper part of the hook head (31) through a second nut (37).

9. A hook according to any one of claims 1 to 8, characterised in that The pulley block (2) comprises a pulley shaft (22) which crosses the yoke plate assembly (1) in the axial direction thereof, a third sleeve (23) being sleeved on the pulley shaft (22), and the pulley (21) being sleeved on the pulley shaft (22).

10. A crane, characterized in that The hook comprises the hook according to any one of claims 1-9.

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