CN202542753U - Luffing fixed pulley block of luffing jib tower crane and luffing jib tower crane with same - Google Patents

Abstract

The utility model provides a swing arm tower machine becomes width of cloth fixed pulley group and has its swing arm tower machine. The luffing crown block of the swing arm tower crane comprises: the pulley support comprises a mounting fixing part, a pulley supporting part and a joint connecting part which are relatively and fixedly arranged, the pulley supporting part is positioned between the mounting fixing part and the joint connecting part, and the mounting fixing part is used for being fixedly connected with the tower top of the movable arm tower crane; the fixed pulley block comprises more than two fixed pulleys which are coaxially and rotatably arranged on the pulley supporting part, and the more than two fixed pulleys comprise a starting end fixed pulley and a tail end fixed pulley; and the wedge-shaped joint is connected with the joint connecting part, and the rope feeding direction of the wedge-shaped joint and the rope winding groove of the tail end fixed pulley at the tail end of the more than two fixed pulleys are positioned in one plane. The utility model discloses prevent unbalanced moment of torsion effectively and produce, solved the deflection problem of running block well, reduced the moment of torsion of the width of cloth pull rod to the cantilever crane, improved swing arm tower machine's fail safe nature.

Description

Luffing fixed pulley block of luffing jib tower crane and luffing jib tower crane with same

technical field

The utility model relates to the field of hoisting machinery, in particular to a luffing fixed pulley block of a boom tower crane and a boom tower crane with the same.

Background technique

The biggest difference between the luffing jib tower crane and the horizontal jib tower crane is that the jib frame of the luffing jib tower crane can rotate around the root of the jib frame to achieve lifting amplitude. The luffing of the luffing jib tower crane is realized by the luffing steel wire rope installed between the luffing fixed pulley block and the luffing movable pulley block, that is, changing the luffing wire rope between the luffing fixed pulley block and the luffing movable pulley of the luffing jib tower crane The length between the pulley blocks is used to adjust the rotation angle of the boom. If the upper surface steel wire rope and the lower surface steel wire rope on the luffing fixed pulley block and the luffing movable pulley block of the boom tower crane are not in the same plane, it is easy to cause the deflection of the luffing movable pulley block, so that the generated torque acts on the luffing rod through the luffing pulley On the jib, it will have an adverse effect on the force of the jib and reduce the safety and reliability of the jib tower crane.

Fig. 1 shows a schematic diagram of the rope winding state between the luffing fixed pulley block and the luffing movable pulley block of the prior art luffing jib tower crane. The wedge joint 3' is fixed on the pull plate 1' coaxial with the luffing fixed pulley block 2' of the luffing jib tower crane and rotatable. The luffing steel wire rope enters the luffing fixed pulley block 2' from the rope inlet end 6a', and after winding between the pulleys of the luffing fixed pulley block 2' and the luffing movable pulley block 8', it winds out from the luffing movable pulley block 8' The last section 6d' of the luffing wire rope is fixed on the wedge joint 3'. As shown in Figure 1, since the wedge joint 3' can rotate around the axis of the fixed pulley block 2', the steel wire rope 6b' on the upper surface is in the same plane, but the extension line of the last section 6d' of the steel wire rope on the lower surface is in line with the axis of the fixed pulley block 2' Intersect, so it is higher than the steel wire rope 6c' on the lower surface, so that the luffing movable pulley block 8' deflects under the action of the last section of steel wire rope 6d', so that the generated torque acts on the jib through the luffing rod, which affects the jib The force is adversely affected, which reduces the safety and reliability of the luffing jib tower crane.

Utility model content

The purpose of the utility model is to provide a luffing fixed pulley block and a luffing tower crane with the luffing jib tower crane, aiming at solving the deflection problem of the luffing movable pulley block of the luffing jib tower crane.

The utility model provides a variable-amplitude fixed pulley block of a boom tower crane, comprising: a pulley bracket, the pulley bracket includes a relatively fixed installation and fixing part, a pulley support part and a joint connection part, and the pulley support part is located at the installation and fixation part and the joint connection part Between them, the fixed part is installed for fixed connection with the tower top of the boom tower crane; the fixed pulley block includes two or more fixed pulleys coaxially and rotatably arranged on the pulley support part, and the two or more fixed pulleys include the fixed pulley at the starting end and the terminal fixed pulley; the wedge-shaped joint is connected with the joint connection part, and the rope-feeding direction of the wedge-shaped joint is in a plane with the rope-winding groove of the terminal fixed pulley at the end among the two or more fixed pulleys.

Further, the luffing fixed pulley block of the boom tower crane also includes a pulley support pin shaft, and the fixed pulley block is arranged on the pulley support part through the pulley support pin shaft.

Further, the pulley bracket includes: a beam, the installation and fixing part includes the beam; the ear plate group includes more than two ear plates, and the two or more ear plates are respectively vertically fixed on the beam, and the pulley support part is arranged on the two or more ear plates A pin hole arranged in cooperation with the pulley support pin.

Further, the joint connection part is located on at least one ear plate among the two or more ear plates.

Further, the wedge joint includes a joint pin shaft, through which the wedge joint is pivotally connected to the joint connecting part; the ear plate group includes a first ear plate located outside the terminal fixed pulley and a second ear plate located inside, and the joint connecting part is Connecting holes are respectively provided on the first lug plate and the second lug plate to cooperate with the joint pins.

Further, the lug set also includes a fourth lug located outside the fixed pulley at the starting end of the fixed pulley set.

Further, the fixed pulley set also includes three intermediate fixed pulleys, and the lug set also includes a third lug, the third lug is located between the two middle fixed pulleys, and the third lug and the fourth lug are provided with Two fixed pulleys.

Further, the pulley bracket also includes two or more ribs, the two or more ribs include a starting rib arranged outside the fourth lug and an end rib located outside the first lug, and the starting rib is respectively connected to the The beam and the fourth ear plate are vertically fixed, and the end ribs are respectively vertically fixed to the beam and the first ear plate.

Further, the luffing fixed pulley block of the luffing jib tower crane further includes hooks, and the two hooks are respectively arranged on the fourth lug plate and the first lug plate for hanging the luffing movable pulley block of the luffing jib tower crane.

Further, the luffing fixed pulley block of the luffing jib tower crane also includes a rope retaining rod, which is respectively connected to the fourth ear plate and the first ear plate.

Further, the pulley bracket further includes a connecting plate, which is located at one end of the joint connection portion of the pulley bracket and is fixedly connected to the first lug plate and the second lug plate respectively.

The utility model also provides a boom tower crane, which includes a tower top and the aforementioned luffing fixed pulley block of the boom tower crane arranged on the tower top.

According to the luffing fixed pulley block of the luffing jib tower crane and the luffing jib tower crane with it of the utility model, since the wedge-shaped joint at the end of the fastening steel wire rope is designed so that the rope-out direction is on the same plane as the winding groove of the fixed pulley at the end, and the wedge-shaped joint It is connected to the joint connection part relatively fixed to the pulley installation part, rather than connected to the rotatable pull plate at the end of the pulley block. Therefore, the extension line of the last section of the luffing wire rope will not intersect with the axis of the fixed pulley block Even if the steel wire ropes on the upper and lower surfaces of the fixed pulley block are on the same plane, the unbalanced torque can be effectively prevented, the deflection problem of the movable pulley block can be solved well, the torque of the luffing rod to the boom can be reduced, and the boom can be improved. The safety and reliability of the luffing jib tower crane. The luffing fixed pulley block of the boom tower crane has simple structure, reasonable force, good overall stability and convenient installation.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation of the utility model. In the attached picture:

Fig. 1 is a schematic diagram of the rope winding state between the luffing fixed pulley block and the luffing movable pulley block of the luffing jib tower crane of the prior art;

Fig. 2 is a partial structural schematic diagram of the boom tower crane with the luffing fixed pulley block of the boom tower crane according to the utility model;

Fig. 3 is a structural schematic diagram of the luffing fixed pulley block of the luffing jib tower crane according to the utility model;

Fig. 4 is a schematic diagram of the X-direction structure of Fig. 2; and

Fig. 5 is a schematic diagram of the rope winding state between the luffing fixed pulley block and the luffing movable pulley block of the luffing jib tower crane according to the utility model.

Detailed ways

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

As shown in Figure 2, the A-frame 60 and the jib 70 of the luffing jib tower crane in this embodiment are connected to the balance arm 80 through the pin shaft, and the luffing rod 50 is connected to the jib 70 through the pin shaft, so that The luffing movable pulley block 30 on the amplitude pull rod 50 is connected with the luffing fixed pulley block 10 on the tower top 60 (or A-frame) through the luffing wire rope 20 . The jib 70 of the jib tower crane can rotate around the root of the jib 70 to realize lifting luffing. 30 luffing wire rope 20 to achieve, change the length of the luffing wire rope 20 between the luffing fixed pulley block 10 and the luffing movable pulley block 30 of the boom tower crane to adjust the rotation angle of the boom 70.

The luffing fixed pulley block of the boom tower crane of the utility model mainly comprises a pulley bracket, a fixed pulley block and a wedge joint. The pulley bracket includes a relatively fixed installation and fixing part, a pulley support part and a joint connecting part, the pulley support part is located between the installation and fixing part and the joint connection part, and the installation and fixing part is used for connecting with the The tower top of the boom tower crane is fixedly connected. The fixed pulley block includes more than two fixed pulleys coaxially and rotatably arranged on the pulley supporting part. The wedge joint is connected with the joint connection part, and the rope feeding direction of the wedge joint is in a plane with the rope winding groove of the terminal fixed pulley among the more than two fixed pulleys.

In the embodiment shown in Figures 3 to 5, the luffing fixed pulley block 10 of the luffing jib tower crane includes a pulley bracket 1, a fixed pulley block 2, a standard wedge joint 3, a pulley support pin 4, two hooks 5 and Rope retaining rod 6.

The pulley bracket 1 mainly includes a beam 11 and an ear plate group. The crossbeam 11 is connected to the tower top 60 of the boom tower crane as an installation and fixing part. The ear plate group includes more than two ear plates, specifically the first ear plate 13, the second ear plate 14, the third ear plate 15 and the fourth ear plate 16, and each ear plate is vertically fixed on the beam 11 respectively. The top of the crossbeam 11 on the lug plate is respectively provided with pin holes that cooperate with the pulley support pin shaft 4 . The beam 11 is preferably made of steel pipe.

In this embodiment, the fixed pulley block 2 specifically includes a starting end fixed pulley 21, middle fixed pulleys 22, 23, 24 and an end fixed pulley 25, and the fixed pulley block 2 is arranged on the pulley bracket 1 through the pulley support pin shaft 4 as a pulley support portion on the pin hole. It can be understood that the fixed pulley block 2 of the present invention may include two, three, four or more than five fixed pulleys.

Specifically, in the lug group, the first lug 13 is located outside the end fixed pulley 25, the second lug 14 is located inside the end fixed pulley 25, and the third lug 15 is located between the middle fixed pulley 22 and the middle fixed pulley 23. , the fourth ear plate 16 is located at the outside of the fixed pulley 21 at the starting end of the fixed pulley block.

Connecting holes for fitting with joint pin shafts 31 are respectively provided above the pin holes on the first lug plate 13 and the second lug plate 14 . The wedge joint 3 includes a joint pin shaft 31 , through which the wedge joint 3 is pivotally connected to a connection hole serving as a joint connection portion.

The pulley bracket 1 further includes a connecting plate 17, which is located at one end of the joint connecting portion of the pulley bracket 1 and is fixedly connected to the first lug plate 13 and the second lug plate 14 respectively. The connecting plate 17 makes the first lug plate 13 and the second lug plate 14 form an integral body, increases the strength of the joint positioning part, and thus plays a role in preventing the wire rope at the end from shifting.

The pulley bracket 1 also includes more than two ribs 12, and more than two ribs 12 include a starting end rib arranged on the outside of the fourth ear plate 16 and an end rib located on the outside of the first ear plate 13, and the starting end rib They are respectively fixed vertically to the beam 11 and the fourth ear plate 16 , and the end ribs are respectively fixed vertically to the beam 11 and the first ear plate 13 . More than two ribs 12 can increase the overall strength of the pulley bracket 1 .

Preferably, it is a weldment composed of a beam 11 , two or more rib plates 12 , a first lug plate 13 , a second lug plate 14 , a third lug plate 15 , a fourth lug plate 16 and a connecting plate 17 .

The luffing fixed pulley block of the boom tower crane also includes a hook 5, and the two hooks 5 are respectively arranged on the fourth ear plate 16 and the first ear plate 13. Temporarily suspend the luffing movable pulley block 30 of the boom tower crane during roping.

The luffing fixed pulley block of the luffing tower crane further includes a rope retaining rod 6, which is respectively connected with the fourth ear plate 16 and the first ear plate 13. The rope retaining bar 6 can prevent the luffing wire rope from slipping out of the rope winding groove of each fixed pulley.

3 to 5, when the luffing steel wire rope 20 is wound, the luffing movable pulley block 30 is temporarily placed on the pulley bracket 1 of the luffing fixed pulley block 10 of the boom tower crane through two hooks 5, and the luffing wire rope drum 40 After the luffing steel wire rope 20 enters the rope from the fixed pulley 21 at the starting end closest to the fourth ear plate 16, it passes through the corresponding movable pulley of the luffing movable pulley block 30, and then passes through the fixed pulley 22, and so on until the variable After passing through all the movable pulleys of the luffing movable pulley block 30, the width steel wire rope 20 passes through the fixed pulley 25 at the end closest to the first lug 13, and is connected to the first lug 13 and the second lug 14 through the wedge joint 3 . After winding the rope, loosen the luffing pulley block 30 on the hook 5, then the luffing pulley block 30 is connected with the boom 70 through the luffing rod 50 under the joint action of the hoisting mechanism and the luffing mechanism, so that The whole boom is pulled up and the amplitude of the boom is realized. The wire rope 20 between the luffing fixed pulley block 10 and the luffing movable pulley block 30 of the boom tower crane is on the upper and lower planes respectively, thereby solving the deflection problem of the luffing movable pulley block 30 and reducing the number of luffing rods 50 on the arm. The torque of the frame makes the luffing jib tower crane have good bearing capacity and strong torsion resistance, which improves the safety and reliability of the luffing jib tower crane.

It can be seen from the above description that the above-mentioned embodiments of the utility model have achieved the following technical effects: because the wedge-shaped joint at the end of the fastening wire rope is designed so that the direction of the rope is on the same plane as the rope-winding groove of the fixed pulley at the end, and the wedge-shaped The joint is connected to the joint connection part relatively fixed to the pulley installation part, not to the rotatable pull plate at the end of the pulley block, so the extension line of the last section of the luffing wire rope will not intersect with the axis of the fixed pulley block Even if the steel wire ropes on the upper and lower surfaces of the fixed pulley block are on the same plane, the unbalanced torque can be effectively prevented, the deflection problem of the movable pulley block can be solved well, and the torque of the luffing rod to the boom can be reduced. , improving the safety and reliability of the tower crane. The luffing fixed pulley block of the boom tower crane has simple structure, reasonable force, good overall stability and convenient installation. Moreover, the winding of the luffing steel wire rope between the luffing fixed pulley block and the luffing movable pulley block of the luffing jib tower crane is convenient and fast.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (12)

1. A luffing fixed pulley block of a boom tower crane, characterized in that it comprises: The pulley bracket (1), the pulley bracket (1) includes a relatively fixed installation and fixing part, a pulley support part and a joint connection part, the pulley support part is located between the installation and fixation part and the joint connection part, The installation and fixing part is used for fixed connection with the tower top (60) of the boom tower crane; The fixed pulley block (2) includes two or more fixed pulleys coaxially and rotatably arranged on the pulley support part, and the two or more fixed pulleys include a starting fixed pulley (21) and an end fixed pulley (25); The wedge joint (3) is connected to the joint connection part, and the rope feeding direction of the wedge joint (3) is in the same position as the rope winding groove of the terminal fixed pulley (25) at the end of the two or more fixed pulleys. within a plane. 2. The luffing fixed pulley block of the luffing tower crane according to claim 1, characterized in that, the luffing fixed pulley block of the luffing jib tower crane also includes a pulley support pin (4), and the fixed pulley block (2) passes through the The pulley support pin shaft (4) is arranged on the pulley support part. 3. The luffing fixed pulley block of the luffing jib tower crane according to claim 2, characterized in that, the pulley bracket (1) comprises: a beam (11), and the installation and fixing part comprises the beam (11); The ear plate group includes two or more ear plates, and the two or more ear plates are respectively vertically fixed on the beam (11), and the pulley support part is arranged on the two or more ear plates and the pulley The supporting pin shaft (4) cooperates with the pin hole that is set. 4. The luffing fixed pulley block of the luffing jib tower crane according to claim 3, characterized in that, the joint connection part is located on at least one of the two or more ear plates. 5. The luffing fixed pulley block of the luffing jib tower crane according to claim 4, characterized in that, The wedge joint (3) includes a joint pin shaft (31), and the wedge joint (3) is pivotally connected to the joint connection part through the joint pin shaft (31); The ear plate group includes a first ear plate (13) located outside the end fixed pulley (25) and a second ear plate (14) inside, and the joint connection part is respectively arranged on the first ear plate (14). The connecting hole on the plate (13) and the second lug plate (14) is matched with the joint pin shaft (31). 6. The luffing fixed pulley block of the luffing jib tower crane according to claim 5, characterized in that, the lug group further comprises a fourth lug (16) located outside the fixed pulley (21) at the starting end of the fixed pulley block . 7. The luffing fixed pulley block of the luffing jib tower crane according to claim 6, characterized in that, the fixed pulley block (2) also includes three intermediate fixed pulleys (22, 23, 24), and the lug block set also includes The third ear plate (15), the third ear plate (15) is located between the two intermediate fixed pulleys, and a Two fixed pulleys. 8. The luffing fixed pulley block of the boom tower crane according to claim 6 or 7, characterized in that, the pulley support (1) further comprises two or more ribs (12), and the two or more ribs (12 ) includes a starting rib that is arranged on the outside of the fourth lug (16) and an end rib that is positioned outside the first lug (13), and the starting rib is connected to the crossbeam (11) respectively ) and the fourth ear plate (16) are vertically fixed, and the end ribs are respectively vertically fixed with the beam (11) and the first ear plate (13). 9. The luffing fixed pulley block of the luffing tower crane according to claim 6 or 7, characterized in that, the luffing fixed pulley block of the luffing jib tower crane also includes a hook (5), and the two hooks (5) are respectively arranged on The fourth ear plate (16) and the first ear plate (13) are used to hang the luffing pulley block (30) of the boom tower crane. 10. The luffing fixed pulley block of the luffing tower crane according to claim 6 or 7, characterized in that the luffing fixed pulley block of the luffing jib tower crane further comprises a rope retaining rod (6), and the rope retaining rods (6) are respectively It is connected with the fourth ear plate (16) and the first ear plate (13). 11. The luffing fixed pulley block of the boom tower crane according to claim 5, characterized in that, the pulley bracket (1) further comprises a connecting plate (17), and the connecting plate (17) is located on the pulley bracket (1 One end of the joint connection part of ) is fixedly connected with the first ear plate (13) and the second ear plate (14) respectively. 12. A boom tower crane, comprising a tower top (60) and a luffing fixed pulley block (10) arranged on the tower top (60), characterized in that the luffing and fixed pulley block of the boom tower crane is The pulley block (10) is the luffing fixed pulley block of the boom tower crane according to any one of claims 1 to 11.

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