Lifting hook fixing structure for crane

Abstract

The utility model provides a lifting hook fixing structure for a crane. The lifting hook fixing structure comprises a fixing assembly arranged on a lifting arm and a connecting assembly arranged on a lifting hook, the fixing assembly comprises two side fixing plates and a limiting pin shaft, the two side fixing plates are symmetrically arranged on the two sides of the lower portion of the suspension arm respectively, and open grooves are formed in the side fixing plates; the limiting pin shaft is fixed to the middle position of the bottom of the suspension arm through the pin shaft mounting plate and located between the two side fixing plates. The connecting assembly comprises two side connecting plates, a fixed pin shaft and a middle connecting plate, the two side connecting plates are symmetrically arranged on the two sides of the lifting hook respectively, and the two ends of the fixed pin shaft are vertically connected with the two side connecting plates respectively; one end of the middle connecting plate is fixed in the middle of the fixed pin shaft, and the other end is provided with a chute; the fixing pin shaft is clamped into the open groove, and meanwhile the limiting pin shaft slides into the sliding groove to fix the lifting hook to the lifting arm. According to the utility model, the fixed pin shaft is clamped into the open slot, and meanwhile, the limiting pin shaft slides into the sliding chute, so that the lifting hook is fixed on the lifting arm.

Description

Technical Field

[0001] The utility model belongs to the technical field of crane equipment, and in particular relates to a hook fixing structure for a crane. Background Art

[0002] In recent years, with the rapid development of my country's industry and construction industry, the application field of construction cranes has become increasingly wide. The hook is an essential component for crane lifting operations. On the one hand, it is the connection point between the object being lifted and the crane. The object being lifted is lifted by the hook to complete the actions of amplitude change, rotation, displacement, etc. On the other hand, the pulley block inside the hook is combined with the pulley block at the lifting end of the boom to amplify the bearing capacity of the wire rope and improve the lifting performance of the crane. It should be noted that during the transportation of the crane, the hook should be fixed to prevent shaking and injury and damage to the boom or other parts.

[0003] At present, there are mainly the following types of hook fixing methods in China:

[0004] 1. Install a lifting ring in front of the crane body, or install a fixed seat or other fixed structure on the deck of the marine crane, and fix the hook to the fixed structure outside the crane; this method is not suitable for the tower operation of the wind power maintenance crane, because during the tower operation, the hook needs to be transported to the tower together with the crane. At this time, the fixed position of the hook can only rely on other parts on the crane;

[0005] 2. Set up a wire rope in front of the crane and fix the hook on the wire rope. When fixing with wire rope, it needs to be tightened and loosened manually, which is time-consuming and laborious.

[0006] 3. The crane hook is placed separately and needs to be installed when in use, which is cumbersome to install;

[0007] 4. An automatic locking mechanism driven by a micro motor is set on the crane boom, and a microcontroller is used for automatic locking and fixing; the mechanism involves many parts, is heavy, has high cost, and is difficult to maintain.

[0008] Therefore, it is necessary to provide a hook fixing structure for a crane. Utility Model Content

[0009] The utility model provides a hook fixing structure for a crane, wherein a side fixing plate is arranged at the lower part of a boom, an open groove is arranged on the side fixing plate, a fixing pin shaft and an intermediate connecting plate are arranged on the hook, the fixing pin shaft is clamped into the open groove of the side fixing plate, and a limiting pin shaft slides into a sliding groove of the intermediate connecting plate, so that the hook is fixed to the boom.

[0010] To achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0011] A hook fixing structure for a crane, comprising a fixing assembly arranged on a boom and a connecting assembly arranged on the hook;

[0012] The fixing assembly includes a side fixing plate and a limiting pin shaft. The side fixing plates are two and are symmetrically arranged on both sides of the lower part of the boom. The side fixing plates are provided with an open slot. The limiting pin shaft is fixed to the middle position of the bottom of the boom through a pin shaft mounting plate and is located between the two side fixing plates.

[0013] The connecting assembly includes a side connecting plate, a fixed pin shaft and an intermediate connecting plate. The side connecting plates are two and are symmetrically arranged on both sides of the hook. The two ends of the fixed pin shaft are respectively vertically connected to the two side connecting plates; one end of the intermediate connecting plate is fixed to the middle of the fixed pin shaft, and the other end is provided with a slide groove;

[0014] The fixing pin is inserted into the opening slot, and the limiting pin slides into the sliding slot to fix the hook to the boom.

[0015] Preferably, the lower edge of the side fixing plate extends away from the lifting end of the boom to form a guide edge, the opening groove is arranged at the starting point of the guide edge, and the guide edge guides when the fixing pin shaft is inserted into the opening groove.

[0016] Preferably, when the boom is arranged horizontally, the opening of the opening slot is located obliquely above the guide edge, and when the fixing pin shaft is inserted into the opening slot, the opening slot prevents the fixing pin shaft from being separated from the side fixing plate.

[0017] Preferably, a guide plate is provided on the inner side of one end of the side connecting plate close to the lifting end of the boom, and the guide plate is bent toward the inner side of the side connecting plate, and the guide plate guides when the side connecting plate contacts the side fixing plate.

[0018] Preferably, the distance between the inner walls of the two side fixing plates is slightly larger than the distance between the outer walls of the two side connecting plates, so that the two side connecting plates are allowed to enter between the two side fixing plates during the process of the fixing pin being inserted into the opening groove.

[0019] Preferably, a limiting plate is provided on the inner wall of the side fixing plate, and the limiting plate limits the range in which the two side connecting plates enter the two side fixing plates.

[0020] Preferably, the slide groove of the middle connecting plate has an opening, the opening is located at one end of the middle connecting plate close to the lifting end of the boom, and the opening is trumpet-shaped.

[0021] Compared with the prior art, the technical solution of the embodiment of the utility model has beneficial effects.

[0022] The utility model provides a hook fixing structure for a crane, wherein a side fixing plate and a limit pin are arranged at the lower part of the boom, an open groove is arranged on the side fixing plate, a fixing pin and an intermediate connecting plate are arranged on the hook, the fixing pin is inserted into the open groove of the side fixing plate, and the limit pin slides into the sliding groove of the intermediate connecting plate, so that the hook is fixed to the boom. The overall structure is simple and reliable, and is convenient for maintenance and overhaul.

[0023] Furthermore, a guide edge is extended from the lower edge of the side fixing plate, and an opening groove is arranged at the starting point of the guide edge. When the boom is horizontally arranged in a non-working state, the opening of the opening groove is located obliquely above the guide edge. When the fixing pin shaft is inserted into the opening groove, the opening groove prevents the fixing pin shaft from detaching from the side fixing plate and maintains a locked state.

[0024] Furthermore, when the crane is in operation, the boom is raised, and the opening of the opening slot is located obliquely downward. When the wire rope connected to the hook is in a relaxed state, the hook is automatically unhooked under the action of gravity. When the hook is retracted, the wire rope is tightened, and the fixing pin shaft is inserted into the opening slot under the guidance of the guide edge, and the hook is automatically locked, so that unhooking and locking can be achieved quickly, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of locking the hook fixing structure used for the crane in the embodiment of the utility model when the crane is not in working state;

[0026] Figure 2 It is a schematic diagram of the installation of the fixing assembly on the boom in the embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the installation of the fixed components in the embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the installation of the connection assembly in the embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of locking the hook of the hook fixing structure used for the crane in the embodiment of the utility model;

[0030] Figure 6 It is a structural schematic diagram of the hook fixing structure for a crane in an embodiment of the utility model, in which a side fixing plate and a side connecting plate are removed when locking the hook;

[0031] Figure 7 It is a schematic diagram of the hook fixing structure used for a crane in an embodiment of the utility model when it is unhooked;

[0032] Figure 8 It is a schematic diagram of the guide plate guiding when the hook fixing structure of the crane is locked in the embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 1. Connecting assembly; 2. Fixing assembly; 3. Boom; 4. Hook; 5. Wire rope;

[0035] 11. Side connecting plate; 13. Fixed pin shaft; 14. Middle connecting plate; 141. Slide groove; 15. Guide plate;

[0036] 21. Side fixing plate; 211. Opening groove; 212. Guide edge; 22. Limiting plate; 23. Pin mounting plate; 24. Limiting pin. DETAILED DESCRIPTION

[0037] In order to make the purpose, features and beneficial effects of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described below are only used to explain the present invention, rather than to limit the present invention. In addition, the same or similar reference numerals may be used in the figures to refer to the same or similar elements in different embodiments, and the description of the same or similar elements in different embodiments and the description of the prior art elements, features, effects, etc. may be omitted.

[0038] Reference Figures 1 to 8 , an embodiment of the utility model provides a hook fixing structure for a crane.

[0039] Specifically, it includes a fixing assembly 2 arranged on the boom 3 and a connecting assembly 1 arranged on the hook 4;

[0040] The fixing assembly 2 includes a side fixing plate 21 and a limiting pin 24. There are two side fixing plates 21, which are symmetrically arranged on both sides of the lower part of the boom 3. The side fixing plates 21 are provided with an opening slot 211. The limiting pin 24 is fixed to the middle position of the bottom of the boom 3 through a pin mounting plate 23 and is located between the two side fixing plates 21.

[0041] The connecting assembly 1 includes a side connecting plate 11, a fixed pin shaft 13 and an intermediate connecting plate 14. There are two side connecting plates 11, which are symmetrically arranged on both sides of the hook 4. The two ends of the fixed pin shaft 13 are respectively vertically connected to the two side connecting plates 11; one end of the intermediate connecting plate 14 is fixed to the middle of the fixed pin shaft 13, and the other end is provided with a slide groove 141;

[0042] The fixing pin 13 is inserted into the opening slot 211 , and the limiting pin 24 slides into the sliding slot 141 , thereby fixing the hook 4 to the boom 3 .

[0043] In some embodiments, the lower edge of the side fixing plate 21 extends away from the lifting end of the boom 3 to form a guide edge 212, and the opening groove 211 is set at the starting point of the guide edge 212, and the guide edge 212 guides when the fixing pin shaft 13 is inserted into the opening groove 211.

[0044] In some embodiments, when the boom 3 is horizontally arranged, the opening of the opening slot 211 is located obliquely above the guide edge 212 , and when the fixing pin 13 is inserted into the opening slot 211 , the opening slot 211 prevents the fixing pin 13 from being separated from the side fixing plate 21 .

[0045] In some embodiments, a guide plate 15 is provided on the inner side of one end of the side connecting plate 11 close to the lifting end of the boom 3 . The guide plate 15 is bent toward the inner side of the side connecting plate 11 . The guide plate 15 guides when the side connecting plate 11 contacts the side fixing plate 21 .

[0046] In some embodiments, the distance between the inner walls of the two side fixing plates 21 is slightly larger than the distance between the outer walls of the two side connecting plates 11 , and the two side connecting plates 11 are allowed to enter between the two side fixing plates 21 during the process of the fixing pin 13 being inserted into the opening groove 211 .

[0047] In some embodiments, a limiting plate 22 is disposed on the inner wall of the side fixing plate 21 , and the limiting plate 22 limits the range in which the two side connecting plates 11 enter the two side fixing plates 21 .

[0048] In some embodiments, the slide groove 141 of the middle connecting plate 14 has an opening, and the opening is located at one end of the middle connecting plate 14 close to the lifting end of the boom 3 . The opening is trumpet-shaped to facilitate the limiting pin 24 to move into the slide groove 141 .

[0049] In order to better understand the technical solution provided by the embodiment of the utility model, the unhooking and locking process of the hook fixing structure is further described below.

[0050] When the crane is in a non-working state, the boom 3 is in a horizontal posture.

[0051] The hook 4 is connected to the opening slots 211 on the two side fixing plates 21 of the boom 3 through the fixing pin 13; at the same time, the hook 4 is connected to the limit pin 24 provided on the boom through the slide slot 141 of the middle vertical plate 14 of the hook 4. In this posture, the opening of the opening slot 211 on the side fixing plate 21 faces obliquely upward, and under the action of gravity, the fixing pin 13 can be locked in the opening slot 211, so that the hook 4 is locked when the crane is in a non-working state.

[0052] During the crane hoisting operation, the boom 3 is in an upward posture, and the opening of the opening slot 211 on the side fixing plate 21 faces obliquely downward;

[0053] When unhooking is required, the boom 3 is first adjusted to a certain angle, and the wire rope 5 connected to the hook 4 is released. The hook 4 drives the fixed pin 13 to come out of the opening groove 211 due to its own gravity, thereby realizing automatic unhooking of the hook 4.

[0054] When the hook needs to be locked, the boom 3 is first adjusted to a certain angle, and the wire rope 5 connected to the hook 4 is tightened. The hook 4 is gradually pulled up by the wire rope 5 until the fixed pin 13 slides into the open groove 211 and the limit pin 24 slides into the slide groove 141.

[0055] When the hook 4 moves upward, the side connecting plate 11 approaches the side fixing plate 21, and the guide plate 15 contacts the side fixing plate 21 first, and the guide plate 15 guides the side connecting plate 11 and the hook 4 to reach the specified position; after the hook 4 reaches the specified position, the limit plate 22 blocks the side connecting plate 11 and the hook 4 from continuing to move, thereby stopping the dragging movement of the wire rope 5.

[0056] In summary, the hook fixing structure for a crane provided by the utility model is provided with a side fixing plate 21 and a limit pin 24 at the lower part of the boom 3, and an open groove 211 is provided on the side fixing plate 21, and a fixing pin 13 and an intermediate connecting plate 14 are provided on the hook 4. The fixing pin 13 is inserted into the open groove 211 of the side fixing plate 21, and the limit pin 24 slides into the slide groove 141 of the intermediate connecting plate 14, so that the hook 4 is fixed to the boom 3. The overall structure is simple and reliable, and is convenient for maintenance and overhaul.

[0057] Furthermore, in the hook fixing structure for a crane provided by the utility model, the lower edge of the side fixing plate 21 extends to form a guide edge 212, and the opening groove 211 is arranged at the starting point of the guide edge 212. When the boom 3 is in a horizontally arranged non-working state, the opening of the opening groove 211 is located obliquely above the guide edge 212. When the fixing pin shaft 13 is inserted into the opening groove 211, the opening groove 211 prevents the fixing pin shaft 13 from detaching from the side fixing plate 21 and maintains a locked state.

[0058] Furthermore, the utility model provides a hook fixing structure for a crane. When the crane is in operation, the boom 3 rises, and the opening of the opening slot 211 is located obliquely downward. When the wire rope 5 connected to the hook 4 is in a relaxed state, the hook 4 is automatically unhooked under the action of gravity. When the hook 4 is retracted, the wire rope 5 is tightened, and the fixing pin 13 is inserted into the opening slot 211 under the guidance of the guide edge 212, and the hook 4 is automatically locked, so that unhooking and locking can be achieved quickly, thereby improving efficiency.

[0059] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than simply through the specific combination listed in the claims.

Claims

1. A hook fixing structure for a crane, characterized in that: It includes a fixing assembly arranged on the boom and a connecting assembly arranged on the hook; The fixing assembly includes a side fixing plate and a limiting pin shaft. The side fixing plates are two and are symmetrically arranged on both sides of the lower part of the boom. The side fixing plates are provided with an open slot. The limiting pin shaft is fixed to the middle position of the bottom of the boom through a pin shaft mounting plate and is located between the two side fixing plates. The connecting assembly includes a side connecting plate, a fixed pin shaft and an intermediate connecting plate. The side connecting plates are two and are symmetrically arranged on both sides of the hook. The two ends of the fixed pin shaft are respectively vertically connected to the two side connecting plates; one end of the intermediate connecting plate is fixed to the middle of the fixed pin shaft, and the other end is provided with a slide groove; The fixing pin is inserted into the opening slot, and the limiting pin slides into the sliding slot to fix the hook to the boom.

2. The hook fixing structure for a crane according to claim 1, characterized in that: The lower edge of the side fixing plate extends away from the lifting end of the boom to form a guide edge, and the opening groove is arranged at the starting point of the guide edge, and the guide edge guides when the fixing pin shaft is inserted into the opening groove.

3. The hook fixing structure for a crane according to claim 2, characterized in that: When the boom is arranged horizontally, the opening of the opening slot is located obliquely above the guide edge, and when the fixing pin shaft is inserted into the opening slot, the opening slot prevents the fixing pin shaft from being separated from the side fixing plate.

4. The hook fixing structure for a crane according to claim 1, characterized in that: A guide plate is provided on the inner side of one end of the side connecting plate close to the lifting end of the boom, and the guide plate is bent toward the inner side of the side connecting plate, and the guide plate guides when the side connecting plate contacts the side fixing plate.

5. The hook fixing structure for a crane according to claim 1, characterized in that: The distance between the inner walls of the two side fixing plates is slightly larger than the distance between the outer walls of the two side connecting plates. When the fixing pin is inserted into the opening groove, the two side connecting plates are allowed to enter between the two side fixing plates.

6. The hook fixing structure for a crane according to claim 5, characterized in that: A limiting plate is disposed on the inner wall of the side fixing plate, and the limiting plate limits the range in which the two side connecting plates enter the two side fixing plates.

7. The hook fixing structure for a crane according to claim 1, characterized in that: The slide groove of the middle connecting plate has an opening, the opening is located at one end of the middle connecting plate close to the lifting end of the boom, and the opening is trumpet-shaped.

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