CN211366695U

CN211366695U - Lifting hook assembly device and crane

Info

Publication number: CN211366695U
Application number: CN201922017097.8U
Authority: CN
Inventors: 李向鹏; 李长青; 赵瑞学; 王涛
Original assignee: Xuzhou Heavy Machinery Co Ltd
Current assignee: Xuzhou Heavy Machinery Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-08-28
Anticipated expiration: 2029-11-21

Abstract

The utility model relates to a lifting hook assembly device and hoist, wherein, lifting hook assembly device includes: a hook pulley (8) for winding a first wire rope (10); the two first side plates (4) are respectively fixed on two sides of the hook pulley (8) along the axial direction; the first fixing rods (12) axially penetrate through the two first side plates (4) and are fixedly arranged; a protector, a first end of which is rotatably connected to the first fixing rod (12) around the axis of the first fixing rod (12), and a second end of which is fixed when it is turned inward to a first position and can be turned outward to a second position after the fixation is released so as to wind the first wire rope (10); and a height limiting assembly (9) configured to define a maximum lifting height of the hook pulley (8) when the lifting of the hook pulley (8) to the height limiting assembly (9) generates a force with the guard in the first position. The device can realize quick threading and change multiplying power on the basis of protection lifting hook pulley.

Description

Lifting hook assembly device and crane

Technical Field

The utility model relates to an engineering machine tool field especially relates to a lifting hook assembly device and hoist.

Background

The crane hook group is the most common lifting appliance in the hoisting machinery, and the lifting hook is often impacted in the operation process, so the crane hook group is made of high-quality carbon steel with better toughness. The hook is often suspended from the wire rope of the hoisting mechanism by means of a pulley block or the like.

In order to prevent the lifting hook from colliding with the pulley at the head of the suspension arm to damage the mechanism in the lifting process, the crane is provided with a height limiting device, a heavy hammer of the device penetrates through a lifting steel wire rope, is suspended at the head of the suspension arm through a steel wire or a chain, and is reserved with the head of the suspension arm for a certain length, when the lifting hook is in contact with the height limiting heavy hammer, the lifting hook is limited to continue lifting, and the purpose of preventing the collision between the lifting hook and the head of the.

This kind of structural style lifting hook has adopted quick wire rope handling mechanism, can realize multiplying power transform and wire rope handling fast, can solve humanized and convenience problem, but, the condition of colliding with and harm the pulley can take place for high stop device weight at the during operation.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a lifting hook assembly device and hoist can realize quick wire rope handling and transform multiplying power in protection lifting hook pulley mechanism.

An embodiment of the utility model provides a lifting hook assembly device on the one hand, include:

the hook pulley is used for winding a first steel wire rope;

the two first side plates are respectively fixed on two sides of the hook pulley along the axial direction;

the first fixing rod penetrates through the two first side plates along the axial direction and is fixedly arranged;

a protector having a first end rotatably connected to the first fixing lever about an axis of the first fixing lever and a second end fixed while being turned inward to a first position and turned outward to a second position after the fixation is released so as to wind the first wire rope;

a height limiting assembly configured to define a maximum lifting height of the hook pulley when the hook pulley is lifted to the height limiting assembly to exert a force with the guard member in the first position.

In some embodiments, the hook pulley is provided with a plurality of rope grooves for winding the first steel wire rope in the axial direction, and the hook assembly apparatus further includes:

the blocking rod penetrates through the two first side plates along the axial direction and is detachably arranged relative to the first side plates, and the blocking rod is configured to limit the first steel wire rope to be separated from the rope groove;

wherein the second end of the protective member is secured in the first position by being connected to the blocking rod.

In some embodiments, the protector comprises:

the protection rods are respectively arranged at positions between different groups of adjacent rope grooves along the axial direction, the first ends of the protection rods are rotatably connected to the first fixing rod, the second ends of the protection rods are connected with the blocking rod when the protection rods are located at the first position, and the protection rods are allowed to be turned to the second position after the protection rods are separated from the blocking rod.

In some embodiments, the second end of the protection member is provided with a mounting hole along the axial direction, and the blocking rod passes through the mounting hole to be fixed with the first side plate and is separated from the protection member after being axially moved out.

In some embodiments, the hook assembly apparatus further includes a stopper connected to the blocking rod at an outer side of the first side plate, and configured to limit a degree of freedom of the blocking rod in moving in the axial direction.

In some embodiments, the protector comprises:

the protection rods are respectively arranged between the adjacent rope grooves of different groups along the axial direction, the first ends of the protection rods are rotatably connected to the first fixing rod, the second ends of the protection rods are provided with mounting holes along the axial direction, and the blocking rods penetrate through the mounting holes of the protection rods and are fixed with the first side plate.

In some embodiments, the guard is arcuate and concentric with the hanger pulley when the second end of the guard is in the first position.

In some embodiments, two of the protectors are provided, one on each side of the vertical plane in which the hook pulley lies on the axis.

In some embodiments, still include arm head pulley, arm head pulley is the fixed pulley, and the lifting hook pulley is the movable pulley, and height limiting component includes:

the limiting hammer is provided with a through hole, and a first steel wire rope between the arm head pulley and the hook pulley passes through the through hole;

the first end of the second steel wire rope is connected to the arm head pulley, and the second end of the second steel wire rope is connected to the limiting hammer; and

and the switch is configured to be closed when the hook pulley rises to the limit height, so that the gravity of the limit hammer is converted from the load of the second steel wire rope to the load of the protection member, and the hook pulley reaches the maximum lifting height.

In some embodiments, the hook assembly apparatus further comprises:

the second fixing rod axially penetrates through the two first side plates and is fixedly arranged below the hook pulley; and

and the spacers are fixed on the second fixing rod at intervals along the axial direction, are respectively positioned at the positions between different groups of adjacent rope grooves and separate the adjacent rope grooves.

In some embodiments, the hook assembly apparatus further comprises:

two second curb plates are established respectively in the outside of two first curb plates, and are fixed with first curb plate through first dead lever, and the second curb plate sets up with the first curb plate of homonymy at the axial interval, and the interval region is configured to the extension pulley of installation and the coaxial setting of lifting hook pulley.

An embodiment on the other hand of the utility model provides a crane, including the lifting hook assembly device of above-mentioned embodiment.

Based on the technical scheme, the utility model discloses lifting hook assembly device through setting up rotatable protection piece, makes protection piece when being in the primary importance, when the lifting hook pulley reachs the gravity that the biggest hoisting height made high spacing subassembly and undertakes by the lifting hook pulley, can make high spacing subassembly and protection piece direct contact, prevents high spacing subassembly and lifting hook pulley direct contact, avoids colliding with and damages the lifting hook pulley. Furthermore, after the second end of the protector is fixed in contact, the protector can be turned to a second position so as to change magnification or rewind the wire rope when the hook is replaced. Therefore, the hook assembly device can realize quick rope threading and multiplying power conversion on the basis of protecting the hook pulley, and can improve the use reliability and convenience of the crane.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

FIG. 1 is a block diagram of one embodiment of a hook assembly apparatus of the present invention;

FIG. 2 is a schematic view of the hook assembly shown in FIG. 1 with the protector disengaged from the blocking rod;

FIG. 3 is a schematic view of a structure of a height limiting assembly disposed in the hook assembly apparatus of the present invention;

fig. 4 is an enlarged view of fig. 3 at K.

Description of the reference numerals

1. A hook; 2. an installation part; 3. a cross beam; 4. a first side plate; 5. a spacer; 6. a blocking lever; 7. a guard bar; 8. a hook pulley; 81. rope grooves; 9. a height limiting assembly; 91. a limiting hammer; 911. a through hole; 92. a second wire rope; 10. a first wire rope; 11. a second side plate; 12. a first fixing lever; 13. a nut; 14. and a second fixing rod.

Detailed Description

The present invention will be described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.

The terms "first", "second", and the like in the present invention are used for convenience of description only to distinguish different constituent elements having the same name, and do not indicate a sequential or primary-secondary relationship.

In addition, when an element is referred to as being "on" another element, it can be directly on the other element or be indirectly on the other element with one or more intervening elements interposed therebetween. In addition, when an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element with one or more intervening elements interposed therebetween. Hereinafter, like reference numerals denote like elements.

The present invention is described with reference to the directions or positional relationships indicated as "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outer", etc., which are merely for convenience of description of the present invention, and do not indicate or imply that the device referred to must have a particular direction, be constructed and operated in a particular direction, and therefore should not be construed as limiting the scope of the present invention.

As shown in fig. 1-4, the present invention provides a hook assembly apparatus for a crane, in some embodiments, the hook assembly apparatus comprising: the lifting hook comprises a lifting hook pulley 8, a first fixing rod 12, a height limiting assembly 9, a protecting piece and two first side plates 4.

As shown in fig. 1 and 3, the hook pulley 8 is provided with a plurality of rope grooves 81 for winding the first steel wire rope 10 at intervals along the axial direction, the hook pulley 8 is a movable pulley, the hook can be fixed on the hook pulley 8, and the hook can be used for lifting heavy objects and can adopt a single hook or a double hook. An arm head pulley is arranged above the lifting hook pulley 8, the arm head pulley is arranged at the arm head position on the arm support, the arm head pulley is a fixed pulley, and a first steel wire rope 10 is wound along the arm head pulley and the lifting hook pulley 8 so as to lift a heavy object through the combination of the fixed pulley and the movable pulley. Hook pulley 8 can be along the axial coaxial setting a plurality of sub-pulleys side by side, adjusts the number of connecting in the first wire rope 10 between arm head pulley and hook pulley 8 through the number that changes the winding sub-pulley of first wire rope 10 to realize multiple multiplying power.

As shown in fig. 1, the two first side plates 4 are fixed to both sides of the hook pulley 8 in the axial direction. The first fixing rods 12 penetrate through the two first side plates 4 in the axial direction and are fixedly arranged, one or more first fixing rods 12 can be arranged between the two first side plates 4, so that a fixed interval is kept between the first side plates 4, the first side plates 4 are prevented from deforming, the hook pulleys 8 can be reliably fixed, and the hoisting stability is improved.

As shown in fig. 3, a height limiting assembly 9 is fixed to the arm head pulley and configured to limit the maximum lifting height of the hook pulley 8 to prevent the hook pulley 8 from colliding with the arm head pulley. The specific structure of the height restricting assembly 9 will be described later.

The first end of the protector is rotatably connected to the first fixed bar 12 about the axis of the first fixed bar 12 and the second end of the protector is fixed when it is turned inwards to the first position shown in figure 1, with a gap between the protector and the hook pulley 8. The height limiting assembly 9 is configured to define a maximum lifting height of the hook pulley 8 when the hook pulley 8 is lifted to the height limiting assembly 9 to exert a force on the guard in the first position; and the second end of the protector, after being unsecured, may be flipped outwardly over the hook pulley 8, i.e. to a second position shown in figure 2, to allow winding of the first wire rope 10.

This embodiment can prevent that hook pulley 8 from bumping with arm head pulley in the lift-up process through setting up height-limiting assembly 9. Through setting up rotatable protection piece, make protection piece when being in the primary importance, when lifting hook pulley 8 reachs the gravity that the biggest lifting height made high spacing subassembly 9 undertaken by lifting hook pulley 8, can make high spacing subassembly 9 and protection piece direct contact, prevent high spacing subassembly 9 and lifting hook pulley 8 direct contact, avoid colliding with and damage lifting hook pulley 8, play the effect of protection lifting hook pulley 8, improve lifting hook assembly device's reliability. Moreover, after the second end of the protection piece is contacted and fixed, the protection piece can be turned to a second position, so that the steel wire rope can be wound again when the multiplying power is changed or the lifting hook is replaced, and the use requirement of a large-tonnage crane product is met. Therefore, the hook assembly device can realize the rapid change of the multiplying power of the steel wire rope and the convenient rope threading of the rope head of the steel wire rope between the pulley blocks on the basis of protecting the hook pulley 8, and can improve the use reliability and convenience of the crane at the same time.

As shown in fig. 1, the hook assembly device of the present invention further includes: and the blocking rod 6 axially penetrates through the two first side plates 4 and is detachably arranged relative to the first side plates 4, and the blocking rod 6 is configured to limit the first steel wire rope 10 from falling out of the rope groove 81. Wherein the second end of the protection element is fixed in the first position by being connected to the blocking rod 6. For example, the first fixing lever 12 is provided in a region of the hook pulley 8 near the top, and the blocking lever 6 is provided in a middle region of the hook pulley 8.

In the embodiment, the blocking rod 6 for blocking the first steel wire rope 10 from coming off is used for fixing the protection piece, so that the function reuse of the blocking rod 6 is realized, and the structure is simplified. Moreover, the blocking rod 6 needs to be detached when the rope is threaded and the multiplying power is changed, meanwhile, the protection piece is also detached from being fixed, the protection piece can be quickly fixed and installed, and the dismounting efficiency is improved.

As shown in fig. 1, the second end of the protector is provided with a mounting hole along the axial direction, and the blocking rod 6 passes through the mounting hole to be fixed with the first side plate 4 and is separated from the protector after being axially moved out. This structure simplifies the connection structure of the second end of the blocking rod 6 to the protector and also facilitates the removal of the blocking rod 6.

In some embodiments, the protector comprises: the protection rods 7 are respectively arranged at positions between different groups of adjacent rope grooves 81 along the axial direction, the first ends of the protection rods 7 are rotatably connected to the first fixing rod 12, the second ends of the protection rods 7 are connected with the blocking rod 6 when located at the first position, and the protection rods 7 are allowed to be turned outwards to the second position after being separated from the blocking rod 6.

This embodiment can alleviate the weight of protection piece on the basis of protecting lifting hook pulley 8 to reduce the influence to the whole weight of lifting hook assembly device, through exposing grooving 81, can also avoid influencing first wire rope 10's work, and easily observe first wire rope 10's the winding condition, can in time discover and investigate when breaking down.

Further, the hook assembly apparatus further includes a limiting member connected to the blocking rod 6 at the outer side of the first side plate 4, and configured to limit the degree of freedom of the blocking rod 6 in moving in the axial direction. For example, the stopper is a cotter pin or a nut, and the blocking rod 6 can be quickly fixed and detached.

In some embodiments, the protector comprises: the protection rods 7 are respectively arranged at positions between different groups of adjacent rope grooves 81 along the axial direction, the first ends of the protection rods 7 are rotatably connected to the first fixing rods 12, specifically, mounting holes can be axially formed in the first ends of the protection rods 7, and the first fixing rods 12 penetrate through the mounting holes of the protection rods 7 to be fixed with the first side plate 4; the second end of the protection rod 7 is also provided with an installation hole along the axial direction, and the blocking rod 6 passes through the installation hole of each protection rod 7 to be fixed with the first side plate 4. This configuration enables the blocking rod 6 to be disengaged from the protection by means of axial displacement.

As shown in fig. 2, the protector has an arc shape and is concentric with the hook pulley 8 when the second end of the protector is in the first position. This structure can protect the circumferential surface of hook pulley 8, can make protection spare be close to hook pulley 8 as far as possible again, minimizes the space that protection spare occupy.

Specifically, each protection rod 7 is arc-shaped and has the same radius, and the structure can protect the hook pulley 8 through a structural member with a small size.

As shown in fig. 1, the hook assembly device of the present invention further includes: lifting hook 1, crossbeam 3 and nut 13, lifting hook 1 connects in the below of lifting hook pulley 8 through first curb plate 4, and is located between two first curb plates 4. Specifically, the both ends of crossbeam 3 pass first curb plate 4 respectively and fix, and the intermediate position of crossbeam 3 is equipped with installation department 2, is equipped with the mounting hole on the installation department 2, and the mounting hole is passed from crossbeam 3 below to the top of lifting hook 1 to close soon fixedly through nut 13 at the top of crossbeam 3 and the screw thread on 8 tops of lifting hook pulley. Further, a bearing is fixed in the mounting hole, the top end of the lifting hook 1 penetrates through an inner ring of the bearing to be connected with the nut 13, and the lifting hook 1 can rotate in a horizontal plane to lift a heavy object more flexibly. When lifting heavy objects, the gravity of the objects is transmitted to the first side plate 4, the hook pulley 8 and the first steel wire rope 10 on the two sides in sequence through the cross beam 3.

The two protecting pieces are respectively arranged on two sides of the vertical plane of the axis of the hook pulley 8. Correspondingly, the first fixing rods 12 are also provided in two, symmetrically on both sides of the vertical plane of the axis.

This embodiment not only can form stable support to two first curb plates 4 through two first dead levers 12, but also can be applicable to the condition that lifting hook 1 is single hook or double hook simultaneously, no matter set up arbitrary side with height-limiting component 9 in the installation, can both form the protection to lifting hook pulley 8 through the fender rod 7 of corresponding side.

As shown in fig. 3 and 4, the lifting hook assembly device of the present invention further includes an arm head pulley, the arm head pulley is a fixed pulley, the lifting hook pulley 8 is a movable pulley, and the height limiting component 9 includes: a stop hammer 91, a second wire rope 92 and a switch.

Wherein, be equipped with through-hole 911 on the stop hammer 91, a first wire rope 10 between arm head pulley and the lifting hook pulley 8 passes through-hole 911, and the internal diameter of through-hole 911 is greater than the diameter of first wire rope 10, and second wire rope 92 is used for leading the removal of stop hammer 91 along vertical direction. For example, the stopper hammer 91 may have a cylindrical structure, and the through hole 911 is eccentrically provided on the stopper hammer 91.

The first end of the second wire rope 92 is connected to the arm head pulley, the second end is connected to the stop hammer 91, and the diameter of the second wire rope 92 is smaller than that of the first wire rope 10.

In the process of lifting the hook pulley 8, the weight of the limiting hammer 91 is borne by the second steel wire rope 92, and the switch is opened under the action of the second steel wire rope 92, so that an electric loop where the switch is located is disconnected; when the hook pulley 8 rises to the limit height, the weight of the limit hammer 91 is completely borne by the protection piece when the hook pulley 8 continues to move upwards after the limit hammer 91 is contacted with the protection piece, at the moment, the gravity of the limit hammer 91 is borne by the second steel wire rope 92 and converted into the gravity borne by the protection piece, and the switch is not stressed by the downward pulling force of the second steel wire rope 92 and is closed, so that an electric loop where the switch is located is closed, a signal that the hook pulley 8 reaches the maximum lifting height is sent, and the hook pulley 8 is controlled to stop rising.

If not set up protection piece, when reacing maximum hoisting height, stop hammer 91 can directly touch lifting hook pulley 8, can cause the damage to lifting hook pulley 8, the utility model discloses an embodiment is through setting up protection piece, when reacing maximum hoisting height, and stop hammer 91 can touch protection piece to avoid with lifting hook pulley 8 direct collision, can protect lifting hook pulley 8.

For the embodiment that the protection member includes a plurality of protection bars 7, since the protection bars 7 are disposed between each group of adjacent protection bars 7, when the multiplying power is adjusted or the rope is threaded, the limiting hammer 91 passes through any one of the first steel wire ropes 10, the protection member 7 at the corresponding position can be used for protection, the universality in use can be improved, and the hook pulley 8 can be comprehensively protected.

As shown in fig. 1, the hook assembly device of the present invention further includes: a second fixing rod 14 axially penetrating through the two first side plates 4 and fixedly arranged below the hook pulley 8; and a plurality of spacers 5 fixed to the second fixing rod 14 at intervals in the axial direction, each spacer 5 being located at a position between different sets of adjacent string grooves 81 and separating the adjacent string grooves 81.

By arranging the spacer 5, the adjacent rope grooves 81 can be separated, and the steel wire ropes between the adjacent rope grooves 81 are prevented from reaching the adjacent rope grooves 81 due to loose winding in the process of rope threading, so that the quick and tidy rope threading is favorably realized. Moreover, through the two first fixing rods 12 arranged in the upper area of the first side plate 4 and the two second fixing rods 14 arranged in the lower area of the first side plate 4, a frame-shaped reinforcing structure can be formed on the first side plate 4 on the two sides, and the reliability of fixing the hook pulley 8 is improved.

As shown in fig. 1, the hook assembly device of the present invention further includes: two second curb plates 11 are established respectively in the outside of two first curb plate 4, and are fixed with first curb plate 4 through first dead lever 12, and second curb plate 11 sets up with the first curb plate 4 of homonymy interval in the axial, and the interval region is configured as the installation and the extension pulley of the coaxial setting of hook pulley 8.

The embodiment provides more options for increasing the lifting capacity or the transformation multiplying power by adding the second side plate 11, and improves the universality of the crane.

The embodiment of the utility model discloses a can realize the quick transform of multiplying power and the rope handling of lifting hook assembly, lifting hook pulley safeguard function simultaneously, can realize the quick transform of multiplying power and the rope handling when the protector overturns to the second position, can realize the lifting hook pulley protection after the protector is fixed, and the protector is fixed with the help of blockking rod 6.

Secondly, the utility model also provides a hoist, including the lifting hook assembly device of above-mentioned embodiment.

It is right above that the utility model provides a lifting hook assembly device has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A hook assembly apparatus, comprising:

a hook pulley (8) for winding a first wire rope (10);

the two first side plates (4) are respectively fixed on two sides of the hook pulley (8) along the axial direction;

the first fixing rod (12) penetrates through the two first side plates (4) along the axial direction and is fixedly arranged;

a protector having a first end rotatably connected to the first fixing lever (12) about an axis of the first fixing lever (12), and a second end fixed while being turned inward to a first position and being turned outward to a second position after the fixation is released so as to wind the first wire rope (10);

a height limiting assembly (9) configured to define a maximum lifting height of the hook pulley (8) when the lifting of the hook pulley (8) to the height limiting assembly (9) generates a force with the guard in the first position.

2. A lifting hook assembly arrangement as claimed in claim 1, characterised in that the hook pulley (8) is provided with a plurality of rope grooves (81) in the axial direction for winding the first steel wire rope (10), the lifting hook assembly arrangement further comprising:

a blocking rod (6) which penetrates through the two first side plates (4) along the axial direction and is detachably arranged relative to the first side plates (4), wherein the blocking rod (6) is configured to limit the first steel wire rope (10) from falling out of the rope groove (81);

wherein the second end of the protection element is fixed in the first position by being connected to the blocking rod (6).

3. A hook assembly as claimed in claim 2, wherein the protector comprises:

a plurality of fender rods (7), follow respectively the position of axial between the adjacent grooving (81) of different groups is established, the first end of fender rod (7) rotationally connect in first dead lever (12), the second end is in when the first position with block that pole (6) are connected, with block that pole (6) break away from the back and allow with fender rod (7) overturn to the second position.

4. A hook assembly as claimed in claim 2, wherein the second end of the protector is provided with a mounting hole in the axial direction through which the blocking rod (6) is secured to the first side plate (4) and is disengaged from the protector after axial removal.

5. A hook assembly device as claimed in claim 4, further comprising a stop connected to the blocking rod (6) outside the first side plate (4) and configured to limit the freedom of movement of the blocking rod (6) in the axial direction.

6. The hook assembly apparatus of claim 4, wherein the protector comprises:

the protection rods (7) are arranged between the adjacent rope grooves (81) of different groups in the axial direction respectively, the first ends of the protection rods (7) are rotatably connected to the first fixing rod (12), the second ends of the protection rods (7) are provided with mounting holes in the axial direction, and the blocking rods (6) penetrate through the mounting holes of the protection rods (7) and are fixed to the first side plate (4).

7. A hook assembly arrangement according to claim 1, wherein the protector is arcuate and concentric with the hook pulley (8) when the second end of the protector is in the first position.

8. A hook assembly as claimed in claim 1, characterised in that the two protectors are provided on either side of the vertical plane in which the axis of the hook pulley (8) lies.

9. A lifting hook assembly device as claimed in claim 1, further comprising an arm head pulley, the arm head pulley being a fixed pulley, the lifting hook pulley (8) being a movable pulley, the height limiting assembly (9) comprising:

the limiting hammer (91), a through hole (911) is formed in the limiting hammer (91), and one first steel wire rope (10) between the arm head pulley and the lifting hook pulley (8) penetrates through the through hole (911);

a second wire rope (92) having a first end connected to the arm head pulley and a second end connected to the stopper hammer (91); and

a switch configured to close when the hook pulley (8) is raised to a limit height, causing the weight of the limit weight (91) to be carried by the second wire rope (92) to translate into being carried by the guard, to signal that the hook pulley (8) has reached a maximum lift height.

10. A hook assembly apparatus as claimed in claim 1, further comprising:

the second fixing rod (14) penetrates through the two first side plates (4) along the axial direction and is fixedly arranged below the hook pulley (8); and

and a plurality of spacers (5) fixed on the second fixing rod (14) at intervals along the axial direction, wherein each spacer (5) is respectively positioned between different groups of adjacent rope grooves (81) and separates the adjacent rope grooves (81).

11. A hook assembly apparatus as claimed in claim 1, further comprising:

two second curb plates (11), establish respectively in two the outside of first curb plate (4), and pass through first dead lever (12) with first curb plate (4) are fixed, second curb plate (11) and homonymy first curb plate (4) are in axial interval sets up, and the interval region is configured as the installation with the extension pulley of hook pulley (8) coaxial setting.

12. A crane comprising a hook assembly according to any one of claims 1 to 11.