Novel crane safety hook device

Abstract

The utility model discloses a novel crane safety hook device, belongs to the technical field of crane hooks, and solves the problems of structural strength change and inconvenience in disassembly and assembly caused by the fact that an existing hook needs to be provided with a hole for mounting a safety anti-falling device. The hook comprises a connecting arm and a hook body and further comprises two arc-shaped clamping plates, connecting plates are arranged at the two ends of openings of the two arc-shaped clamping plates, the two arc-shaped clamping plates wrap the outer wall of the connecting arm, and the connecting plates corresponding to the two arc-shaped clamping plates are connected through first fastening bolts so that the two arc-shaped clamping plates can be clamped on the connecting arm. A transverse plate is arranged on one side of one arc-shaped clamping plate, and L-shaped plates are installed at the two ends of the transverse plate through second fastening bolts. The lifting hook device disclosed by the utility model can effectively prolong the service life of the lifting hook while meeting the safety unhooking prevention requirement, conforms to the safety technical specification of hoisting machinery, and has the characteristic of convenience in disassembly, assembly and maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of crane hooks, and more specifically, to a novel safety hook device for cranes. Background Art

[0002] The hook is a lifting tool used by a crane to suspend a wire rope. For the safety of the lifting work, it is generally necessary to set a safety anti-unhooking device on the hook to prevent the wire rope from falling off and causing safety accidents. At present, the safety anti-unhooking device of the crane is generally a spring-type anti-unhooking hook. For example, the publication number is: CN202575703U, which discloses a hook and a crane with the hook. The hook includes: a hook body; a baffle mounting seat; a baffle; a first torsion spring, which acts on the hook body and the baffle respectively; wherein the baffle includes: a first baffle section, including a pivot end and a first connecting end opposite to the pivot end, the first connecting end including a first abutting surface; a second baffle section, including a free end and a second connecting end opposite to the free end, the second connecting end including a second abutting surface, the first connecting end and the second connecting end are pivotally connected on a side away from the internal space, and the baffle has an anti-unhooking state of closing the opening and an anti-unhooking release state of opening the opening, and in the anti-unhooking state, the first abutting surface abuts against the second abutting surface. According to the hook of the utility model, while ensuring the anti-rope-off function of the hook, the operation of installing the rope into the hook or removing the rope from the hook is convenient and quick, saving time and labor.

[0003] The existing safety anti-unhooking device blocks the wire rope by hingedly installing a baffle on the hook, so it is necessary to open a mounting hole on the hook to install the hinge shaft. Due to the limitations of the casting process, the hook cannot be quenched as a whole, which makes the mounting hole easy to damage. Once the mounting hole has defects such as cracks, lateral deformation, and dangerous section wear, it needs to be repaired, which is very costly. In addition, according to the requirements of TSG 51-2023 "Technical Regulations for Safety of Lifting Machinery", the hook has no mounting hole, the mounting ears cannot be welded, and welding of the hook body is strictly prohibited. Therefore, although the existing safety anti-unhooking device can prevent the problem of unhooking to a certain extent, the overall design of the hook is not standardized, and the structural strength has changed, the service life is insufficient, and disassembly and maintenance are inconvenient.

[0004] Therefore, it is urgent to design a new type of crane safety hook device to solve the above-mentioned problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a new type of crane safety hook device in view of the above-mentioned deficiencies in the prior art. While meeting the safety and anti-unhooking requirements, it can effectively extend the service life of the hook, comply with the safety technical specifications for lifting machinery, and has the characteristics of easy disassembly and maintenance.

[0006] The technical solution of the utility model is as follows: a new type of crane safety hook device comprises a connecting arm and a hook body, the connecting arm is vertically fixed on the top of one end of the hook body, and also comprises two arc-shaped clamping plates, both ends of the openings of the two arc-shaped clamping plates are provided with connecting plates, the two arc-shaped clamping plates are covered on the outer wall of the connecting arm, and the connecting plates corresponding to the two arc-shaped clamping plates are connected by a first fastening bolt so that the two arc-shaped clamping plates are clamped on the connecting arm, one side of one of the arc-shaped clamping plates is provided with a horizontal plate, both ends of the horizontal plate are installed with L-shaped plates by second fastening bolts, and a limiting plate is hingedly installed between the two L-shaped plates by a hinge shaft, a torsion spring is sleeved on the hinge shaft between the limiting plate and the L-shaped plate, the two ends of the torsion spring are respectively connected to the limiting plate and one of the L-shaped plates, and the end of the limiting plate away from the hinge shaft is movably overlapped on the other end of the hook body.

[0007] As a further improvement, the hinge shaft is a pin shaft, which moves through the limit plate and the L-shaped plate in sequence and is inserted with a cotter pin.

[0008] Furthermore, an arc groove is formed at one end of the limit plate away from the hinge shaft, the width of the arc groove is greater than the width of the other end of the hook body, and the end of the other end of the hook body is provided with a hemisphere with a diameter greater than the width of the arc groove, and the limit plate is clamped on the inner side of the hemisphere.

[0009] Furthermore, the outer wall of the hook body is also provided with reinforcing ribs.

[0010] Furthermore, the connecting arm, hook body, hemispherical body and reinforcing ribs are an integrally formed structure.

[0011] Furthermore, the inner wall of each of the arc-shaped clamping plates is provided with anti-slip grooves, and the anti-slip grooves are composed of a plurality of vertically arranged convex grooves.

[0012] Furthermore, the limiting plate is a baffle with a U-shaped cross section, and the inner side surface of the limiting plate is a curved surface.

[0013] Beneficial Effects

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The hook device of the utility model installs the limit plate by arranging a clamp composed of an arc-shaped clamp on the connecting arm. When installing the limit plate, first clamp the two arc-shaped clamps on the connecting arm, and then lock them with a first fastening bolt to fix the position of the limit plate, then install the L-shaped plate by the second fastening bolt, and finally hinge the limit plate to the two L-shaped plates by a hinge shaft, without the need for secondary hole drilling processing on the hook body. While meeting the safety and anti-unhooking requirements, the service life of the hook can be effectively extended and the safety technical specifications for lifting machinery are met. The limit plate adopts a clamp-type fixing structure and can be disassembled by simply loosening the two arc-shaped clamps, and has the characteristics of easy disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at point A in the middle.

[0018] Among them: 1-connecting arm, 2-hook body, 3-arc-shaped clamping plate, 4-connecting plate, 5-first fastening bolt, 6-cross plate, 7-second fastening bolt, 8-L-shaped plate, 9-hinge shaft, 10-limiting plate, 11-arc-shaped groove, 12-hemispherical body, 13-reinforcement rib. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0020] See also Figure 1-2The utility model discloses a novel crane safety hook device, comprising a connecting arm 1 and a hook body 2, wherein the connecting arm 1 is vertically fixed to the top of one end of the hook body 2, and further comprises two arc-shaped clamping plates 3, both ends of the openings of the two arc-shaped clamping plates 3 are provided with connecting plates 4, the two arc-shaped clamping plates 3 are covered on the outer wall of the connecting arm 1 to form a hoop structure, and the connecting plates 4 corresponding to the two arc-shaped clamping plates 3 are connected by a first fastening bolt 5 so that the two arc-shaped clamping plates 3 are clamped on the connecting arm 1, specifically, after the first fastening bolt 5 passes through the two connecting plates 4 at the same end, it is locked with a nut to realize the locking of the two arc-shaped clamping plates 3, one side of one of the arc-shaped clamping plates 3 is provided with a horizontal plate 6, the The horizontal plate 6 and the arc-shaped clamping plate 3 are an integrally formed structure. The axis of the horizontal plate 6 is perpendicular to the axis of the connecting arm 1, so that after the limit plate 10 is installed, it can overlap the other end of the hook body 2. L-shaped plates 8 are installed at both ends of the horizontal plate 6 through second fastening bolts 7. The limit plate 10 is hingedly installed between the two L-shaped plates 8 through a hinge shaft 9. A torsion spring is sleeved on the hinge shaft 9 between the limit plate 10 and the L-shaped plate 8. The two ends of the torsion spring are respectively connected to the limit plate 10 and one of the L-shaped plates 8, so that after the pressure is released, the other end of the limit plate 10 can automatically reset and overlap the other end of the hook body 2, and the end of the limit plate 10 away from the hinge shaft 9 is movably overlapped with the other end of the hook body 2.

[0021] The hook device of the utility model installs the limit plate 10 by arranging a hoop composed of an arc-shaped clamping plate 3 on the connecting arm 1. When installing the limit plate 10, first clamp the two arc-shaped clamping plates 3 on the connecting arm 1, and then use the first fastening bolt 5 to lock them to fix the position of the limit plate 10, then install the L-shaped plate 8 through the second fastening bolt 7, and finally hinge the limit plate 10 on the two L-shaped plates 8 through the hinge shaft 9, without the need for secondary hole drilling processing on the hook body 2. While meeting the safety and anti-unhooking requirements, it can effectively extend the service life of the hook and comply with the safety technical specifications for lifting machinery. The limit plate 10 adopts a hoop-type fixing structure, and can be disassembled by simply loosening the two arc-shaped clamping plates 3, and has the characteristics of convenient disassembly and maintenance.

[0022] Preferably, the hinge shaft 9 is a pin shaft, which moves through the limit plate 10 and the L-shaped plate 8 in sequence and is inserted with a cotter pin. The hinged installation method of the pin shaft and the cotter pin can achieve quick installation and is more convenient for assembly and disassembly.

[0023] Preferably, an arc groove 11 is provided at the end of the limit plate 10 away from the hinge shaft 9, and the width of the arc groove 11 is greater than the width of the other end of the hook body 2. The setting of the arc groove 11 enables the limit plate 10 to be stuck on the other end of the hook body 2 when resetting, and plays a certain guiding role, ensuring that the limit plate 10 can be stuck on the inner side of the hemisphere 12, and the end of the other end of the hook body 2 is provided with a hemisphere 12 with a diameter greater than the width of the arc groove 11, and the limit plate 10 is stuck on the inner side of the hemisphere 12. The setting of the hemisphere 12 plays a limiting role on the limit plate 10, preventing the limit plate 10 from lifting up, which causes a gap between the limit plate 10 and the other end of the hook body 2, thereby ensuring that the wire rope will not fall off.

[0024] Preferably, a reinforcing rib 13 is further provided on the outer wall of the hook body 2, which can effectively improve the structural strength of the hook.

[0025] Preferably, the connecting arm 1, the hook body 2, the hemispherical body 12, and the reinforcing ribs 13 are an integrally formed structure, which is easy to manufacture and can improve the structural strength of the hook to meet the requirements of the lifting machinery design specifications.

[0026] Preferably, the inner wall of each arc-shaped clamping plate 3 is provided with anti-slip grooves, and the anti-slip grooves are composed of a plurality of vertically arranged convex grooves to prevent the arc-shaped clamping plate 3 from circumferential rotation, thereby ensuring that the limit plate 10 can overlap the other end of the hook body 2.

[0027] Preferably, the limiting plate 10 is a baffle with a U-shaped cross section, which can effectively reduce the weight, and the inner side surface of the limiting plate 10 is an arc-shaped surface to avoid interference between the limiting plate 10 and the hook body 2 when being squeezed.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A novel crane safety hook device, comprising a connecting arm (1) and a hook body (2), wherein the connecting arm (1) is vertically fixed to the top of one end of the hook body (2), and is characterized in that: The invention also comprises two arc-shaped clamping plates (3), both ends of the openings of the two arc-shaped clamping plates (3) are provided with connecting plates (4), the two arc-shaped clamping plates (3) are covered on the outer wall of the connecting arm (1), and the connecting plates (4) corresponding to the two arc-shaped clamping plates (3) are connected by a first fastening bolt (5) so that the two arc-shaped clamping plates (3) are clamped on the connecting arm (1), one side of one of the arc-shaped clamping plates (3) is provided with a transverse plate (6), both ends of the transverse plate (6) are installed with L-shaped plates (8) by second fastening bolts (7), a limiting plate (10) is hingedly installed between the two L-shaped plates (8) by a hinge shaft (9), a torsion spring is sleeved on the hinge shaft (9) between the limiting plate (10) and the L-shaped plate (8), the two ends of the torsion spring are respectively connected to the limiting plate (10) and one of the L-shaped plates (8), and one end of the limiting plate (10) away from the hinge shaft (9) is movably overlapped with the other end of the hook body (2).

2. A new type of crane safety hook device according to claim 1, characterized in that: The hinge shaft (9) is a pin shaft, which moves through the limit plate (10) and the L-shaped plate (8) in sequence and is plugged with a cotter pin.

3. A new type of crane safety hook device according to claim 1, characterized in that: An arc-shaped groove (11) is formed at one end of the limiting plate (10) away from the hinge shaft (9), the width of the arc-shaped groove (11) is greater than the width of the other end of the hook body (2), and a hemispherical body (12) with a diameter greater than the width of the arc-shaped groove (11) is formed at the end of the other end of the hook body (2), and the limiting plate (10) is clamped on the inner side of the hemispherical body (12).

4. A new type of crane safety hook device according to claim 3, characterized in that: The outer wall of the hook body (2) is also provided with reinforcing ribs (13).

5. A new type of crane safety hook device according to claim 4, characterized in that: The connecting arm (1), hook body (2), hemispherical body (12) and reinforcing rib (13) are an integrally formed structure.

6. A novel crane safety hook device according to any one of claims 1 to 5, characterized in that: The inner wall of each arc-shaped clamping plate (3) is provided with anti-skid patterns, and the anti-skid patterns are composed of a plurality of vertically arranged convex patterns.

7. A novel crane safety hook device according to claim 6, characterized in that: The limiting plate (10) is a baffle with a U-shaped cross section, and the inner side surface of the limiting plate (10) is a curved surface.

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