CN218025133U - Telescopic tower crane arm - Google Patents

Abstract

The utility model discloses a telescopic tower suspension arm, which belongs to the tower crane field and comprises a crane arm, an amplitude variation trolley arranged on the crane arm and a lifting hook suspended on the amplitude variation trolley, wherein the crane arm is of a multi-stage telescopic structure, the crane arm comprises a main arm and a plurality of movable arms which are sequentially and movably connected relative to the main arm, and each movable arm is provided with a telescopic driving device; two parallel and oppositely arranged walking rails are arranged on the main arm and each movable arm, and the tip parts of the walking rails are respectively provided with a connection rail for connecting with the walking rails positioned on one side of the tip parts; the variable-amplitude trolley comprises a trolley body, wherein two opposite sides of the top surface of the trolley body are respectively provided with a vertical support arm, a transverse support arm is fixedly arranged on the vertical support arm, the free end of the transverse support arm is rotatably connected with a walking wheel matched with a walking track, and the main arm is also provided with a variable-amplitude device for driving the variable-amplitude trolley to move. The utility model discloses not only can effectively improve the arm operating efficiency that contracts of jib loading boom, reasonable in design moreover.

Description

Telescopic tower crane arm

Technical Field

The utility model relates to a tower crane field, in particular to scalable tower davit.

Background

Although the mobile tower crane such as a truck crane, a crawler crane and the like is convenient to move, the mobile tower crane is generally easily limited by site conditions, such as the limitation of the supported site area, the bearing load of the foundation, the hoisting elevation angle and the like.

The fixed tower crane has the advantages of large hoisting weight and high hoisting efficiency, the position of the tower crane needs to be reasonably planned before construction, the dead zone of the tower crane needs to be reduced as much as possible in the arrangement principle, the weight of a hoisted object needs to be rechecked, and collision and staggered construction among tower grouping operation are avoided.

However, under the actual use condition of some projects, the second arm contraction of the arranged fixed tower crane needs to be considered, but the problems of construction period occupation and field construction efficiency reduction exist, and the problem is solved.

SUMMERY OF THE UTILITY MODEL

Have the problem that occupies construction period, influence the efficiency of construction when carrying out the secondary to the fixed tower crane that prior art exists and contract the arm, an object of the utility model is to provide a scalable tower davit.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a telescopic tower suspension arm comprises a crane arm and a variable amplitude trolley arranged on the crane arm, wherein the crane arm is of a multi-stage telescopic structure and comprises a main arm and a plurality of movable arms which are sequentially and movably connected relative to the main arm, and each movable arm is provided with a telescopic driving device; two parallel and oppositely-arranged traveling rails are mounted on the main arm and each movable arm, and a connection rail for connecting the tip of each traveling rail with the traveling rail positioned on one side of the tip of each traveling rail is mounted at the tip of each traveling rail;

the variable-amplitude trolley comprises a trolley body, vertical support arms are respectively installed on two opposite sides of the top surface of the trolley body, transverse support arms are fixedly installed on the vertical support arms, walking wheels matched with the walking tracks are rotatably connected to the free ends of the transverse support arms, and a variable-amplitude device used for driving the variable-amplitude trolley to move is further installed on the main arm.

Preferably, the installation height of the walking rail is sequentially reduced from the root part to the tip part of the crane boom, and the rail gauge of the walking rail is not changed; the tip of the connecting track is in smooth transition with the top surface of the walking track positioned on one side below the connecting track.

Preferably, the amplitude variation device comprises an amplitude contraction winding drum and an amplitude amplification winding drum, and the amplitude contraction winding drum and the amplitude amplification winding drum are both connected with winding motors; the amplitude-reducing coiling drum is fixedly connected with one end, facing the main arm, of the amplitude-reducing trolley through a steel rope, and the steel rope connected to the amplitude-reducing coiling drum is fixedly connected with one end, facing away from the main arm, of the amplitude-reducing trolley after bypassing a steering wheel arranged at the tip of the cargo boom.

Preferably, the telescopic driving device comprises a telescopic motor, and the telescopic motor drives each movable arm to move through a gear rack transmission mechanism.

Preferably, each of the movable arms is provided with a pulley or a slider, and the main arm and the corresponding movable arm are provided with a slide rail adapted to the pulley or the slider.

Preferably, the cross section of the main arm is triangular, the slide rails are mounted at three inner corners of the main arm, and the pulleys or the slide blocks are mounted at three outer corners of the movable arm connected with the main arm.

Preferably, the number of the movable arms is three, and the telescopic length of each movable arm is 20m, 10m and 5m.

Furthermore, each movable arm is provided with a limiting device, and the limiting device is used for locking each movable arm.

Preferably, the limiting device comprises an electromagnet and a limiting pin arranged on the output end of the electromagnet.

The auxiliary arm is pivotally connected to the tip of the lifting arm, and an auxiliary arm driving device for driving the auxiliary arm to rotate is mounted at the tip of the lifting arm; and a walking track is also arranged on the auxiliary arm.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model reside in that:

1. because the crane boom is configured to be a multi-stage telescopic structure, when the boom is required to be contracted, the corresponding movable boom can be driven to move towards one side of the tower body (one side of the root part of the crane boom) only after the telescopic driving device corresponding to each movable boom is started, so that the length of the crane boom is shortened, and the rapidness of the boom contracting operation is realized;

2. because the tip of each walking track is provided with the connection track which is used for being connected with the walking track positioned on one side of the tip, when the movable arm stretches out and draws back, the walking track arranged on the movable arm can keep the connection state with the walking tracks arranged on the adjacent main arms or other movable arms, and the amplitude variation motion of the amplitude variation trolley is not influenced.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic cross-sectional view of a main arm and a primary arm of the present invention;

FIG. 3 is a schematic structural view of a medium amplitude trolley of the present invention;

FIG. 4 is a schematic view of the middle secondary arm of the present invention in use;

fig. 5 is a schematic view of the middle auxiliary arm of the present invention when not in use.

In the figure, 1-main arm, 2-primary arm, 3-secondary arm, 4-tertiary arm, 5-sliding rail, 6-pulley, 7-telescopic driving device, 8-amplitude-variable trolley, 81-vehicle body, 82-vertical supporting arm, 83-transverse supporting arm, 84-traveling wheel, 9-amplitude-variable device, 91-amplitude-reducing winding drum, 92-amplitude-increasing winding drum, 93-steering wheel, 94-steering roller wheel, 95-steel rope, 10-primary arm rail, 11-primary rail, 12-first connecting rail, 13-secondary rail, 14-second connecting rail, 15-tertiary rail, 16-third connecting rail, 17-limiting device and 18-secondary arm.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The terms "first" and "second" in the present technical solution are only used to distinguish the same or similar structures or the corresponding structures having similar functions, and are not the arrangement of the importance of the structures, nor are they the order, or comparison of the sizes, or other meanings.

In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in relation to the present scheme in specific terms according to the general idea of the present invention.

Example one

A telescopic tower suspension arm comprises a crane arm, an amplitude variation trolley arranged on the crane arm and a lifting hook suspended on the amplitude variation trolley.

As shown in fig. 1, the boom is configured to have a multistage telescopic structure, and specifically includes a main arm 1 and a plurality of movable arms that are sequentially and movably connected to the main arm 1, for example, three movable arms are configured, and the three movable arms are referred to as a primary arm 2, a secondary arm 3, and a tertiary arm 4 in order from the root to the tip of the boom (in a direction away from the main arm 1). Of course, in other preferred embodiments, the number of movable arms may be other.

The main arm 1, the primary arm 2, the secondary arm 3 and the tertiary arm 4 are all of a hollow strip-shaped structure formed by splicing metal sections and are sequentially sleeved, and the two adjacent arms can move in a telescopic mode. And the main arm 1, the primary arm 2, the secondary arm 3 and the tertiary arm 4 are configured to have the same structure, and the difference is only that the cross sections are different in size, so that the requirement of sequential sleeving is met. Taking the connection between the main arm 1 and the primary arm 2 as an example, the cross sections of the main arm 1 and the primary arm 2 are both triangular, as shown in fig. 2, slide rails 5 are mounted at three inner corners of the main arm 1, and pulleys 6, which are used in cooperation with the slide rails 5, or sliding blocks, are mounted at three outer corners of the primary arm 2; it will be appreciated that the pulleys 6 are provided in plurality and spaced apart along the length of the primary arm 2. Similarly, the connection between the second-stage arm 3 and the first-stage arm 2 and the connection between the third-stage arm 4 and the second-stage arm 3 are realized in the same way and structure.

In this embodiment, each of the movable arms (the first-stage arm 2, the second-stage arm 3, and the third-stage arm 4) is provided with a telescopic driving device 7, and the telescopic driving device 7 is used for driving the corresponding movable arm to perform telescopic motion. In this embodiment, the specifically configured telescopic driving device 7 includes a telescopic motor, for example, the telescopic motion of the primary arm 2 relative to the primary arm 1 is taken as an example, the telescopic motor is fixed on the primary arm 1 through a motor mounting bracket, and a gear is mounted on an output shaft of the telescopic motor, and a rack engaged with the gear is fixedly mounted on the primary arm 2, so that the telescopic motor drives the primary arm 2 to perform telescopic motion relative to the primary arm 1 through a rack-and-pinion transmission mechanism. Similarly, the telescopic motion of the secondary arm 3 relative to the primary arm 2 and the telescopic motion of the tertiary arm 4 relative to the secondary arm 3 are realized in the same manner and structure.

In this embodiment, as shown in fig. 3, the luffing carriage 8 includes a carriage body 81, and the carriage body 81 is usually located below the boom in use, so that two opposite sides of the top surface of the carriage body 81 are respectively provided with a vertical arm 82 extending upward, a transverse arm 83 is fixedly arranged on the opposite sides of the vertical arm 82, and the free end of the transverse arm 83 is rotatably connected with a road wheel 84 through a bearing. Correspondingly, a walking track for supporting the walking wheels is arranged on the crane boom along the length direction of the crane boom. And, the main arm 1 is usually provided with a luffing device 9 for driving the luffing dolly 8 to move.

In this embodiment, two traveling rails are installed on the main arm 1 and each movable arm, the two traveling rails are parallel and arranged oppositely, and in addition, in order to ensure that the variable amplitude trolley 8 can run without obstacles between the arms of each section, a connection rail for connecting with the traveling rail located on one side of the tip of each traveling rail is installed at the tip of each traveling rail.

Wherein, a main arm track 10 is specified to be arranged on the main arm 1, a primary track 11 is specified to be arranged on the primary arm 2, and a first connection track 12 is connected between the main arm track 10 and the primary track 11; a secondary track 13 is arranged on the secondary arm 3, and a second connection track 14 is connected between the primary track 11 and the secondary track 13; mounted on the tertiary arm 4 is a tertiary rail 15, and docked between the secondary rail 13 and the tertiary rail 15 is a third docking rail 16.

Specifically, when the installation track pitch of the main arm track 10, the installation track pitch of the primary track 11, the installation track pitch of the secondary track 13, and the installation track pitch of the tertiary track 15 are kept unchanged, as shown in fig. 1, it is necessary to install the main arm track 10, the primary track 11, the secondary track 13, and the tertiary track 15 on different height planes from high to low, and: for the first docking rail 12, the root part thereof is fixedly connected with the tip part of the main arm rail 10, the whole body thereof is downward inclined from the root part to the tip part, and the tip part thereof is configured into a wedge shape and smoothly transits with the top surface of the primary rail 11; for the second docking rail 14, the root part thereof is fixedly connected with the tip part of the primary rail 11, the whole body thereof is downward inclined from the root part to the tip part, and the tip part thereof is configured into a wedge shape and smoothly transits with the top surface of the secondary rail 13; for the third docking rail 16, the root portion thereof is fixedly connected with the tip portion of the secondary rail 13, the whole body thereof is downward inclined from the root portion to the tip portion, and the tip portion thereof is configured into a wedge shape and smoothly transits to the top surface of the tertiary rail 15. So set up for become width of cloth dolly 8 when the arm of different sections moves, can go on with the mode of upslope or downhill path, and also not influenced when the digging arm stretches out and draws back, for example one-level arm 2 is flexible for main arm 1, and first connection track 12 can not cause the influence to the motion of one-level track 11.

In this embodiment, the amplitude varying device 9 is specifically installed inside the hollow structure of the main arm 1, the amplitude varying device 9 includes an amplitude reducing winding drum 91 and an amplitude increasing winding drum 92, both of which are fixed inside the main arm 1 through a bracket, correspondingly, two winding motors are further fixedly installed inside the main arm 1, and output shafts of the two winding motors are respectively connected with the amplitude reducing winding drum 91 and the amplitude increasing winding drum 92 in a driving manner. Steel ropes 95 for applying traction force are wound on the amplitude-reducing winding drum 91 and the amplitude-increasing winding drum 92, the amplitude-reducing winding drum 91 is directly and fixedly connected with one end, facing the main arm 1, of the amplitude-increasing trolley 8 through the steel ropes 95, and the steel ropes 95 connected to the amplitude-increasing winding drum 92 are fixedly connected with one end, away from the main arm 1, of the amplitude-increasing trolley 8 after bypassing a steering wheel 93 arranged at the tip of a boom.

In this embodiment, the telescopic lengths of the primary arm 2, the secondary arm 3 and the tertiary arm 4 are further configured to be 20m, 10m and 5m respectively, so that when the crane arm retracts, 7-level arm retraction can be realized by taking 5m as a first gear and between 5m and 35 m. For example, arm 15m can be shortened by shortening secondary arm 3 and tertiary arm 4; the arm 25m can be shortened by shortening the first-stage arm 2 and the third-stage arm 4. It can be understood that the overall length of the first-stage arm 2, the second-stage arm 3 and the third-stage arm 4 is respectively greater than the telescopic length of the first-stage arm, and the second-stage arm and the third-stage arm are arranged in such a way that each movable arm is provided with a part with one end exposed, so that the amplitude-variable trolley 8 can conveniently pass through, and the rail fault is avoided.

Example two

The difference from the first embodiment is that: in this embodiment, each movable arm is provided with a limiting device 17, and the limiting device 17 is used for locking each movable arm. The configuration limiting means 17 comprises, for example, an electromagnet and a limiting pin mounted on the output end of the electromagnet.

Only the telescopic motion between the primary arm 2 and the primary arm 1 will be described as an example: as shown in fig. 2, the limiting device 17 is fixedly installed on the main arm 1, limiting blocks are respectively welded at the root and tip of the primary arm 2, and limiting holes are formed in the limiting blocks. When the primary arm 2 extends out and the limiting hole at the root part of the primary arm is opposite to the limiting device 1, the limiting device 17 is controlled to enable the limiting pin to be popped out and to penetrate into the limiting hole in the primary arm 2, and therefore locking between the primary arm 2 and the main arm 1 can be achieved.

Wherein, still install travel switch on the main arm 1 usually, after the stopper on one-level arm 2 strikes this travel switch, stop device 17 promptly works, realizes locking. Normally, the stroke switch is also used to send a signal to stop the operation of the telescopic motor mounted on the main arm 1.

EXAMPLE III

The difference from the first embodiment is that: in this embodiment, the jib crane further comprises a jib 18, the jib 18 is pivotally connected to the tip of the jib, that is, the jib 18 is pivotally connected to the tip of the tertiary arm 4 through a horizontally arranged pivot, when the jib is not in use, the jib 18 is pivoted above the tertiary arm 4, and meanwhile, a jib driving device for driving the jib 18 to rotate is mounted at the tip of the tertiary arm 4, for example, the jib driving device comprises a motor, and the motor drives the jib 18 to rotate through a gear transmission mechanism. In addition, a traveling rail is also attached to the sub-arm 18, and the traveling rail is connected to the tertiary rail 15 in the same manner as in the first embodiment.

In order to ensure that the luffing apparatus 9 can be used normally both in the folded-in and unfolded state of the jib 18, the arrangement is: the above-mentioned steering wheel 93 is fixedly installed at the tip of the sub-boom 18, and the steering rollers 94 are respectively installed at the upper and lower sides of the tip of the tertiary boom 4 and the upper side of the root of the sub-boom 18, so that when the sub-boom 18 is in the folded state, the steel rope 95 extending from the amplitude-increasing take-up drum 92 can be steered by the steering rollers 94, and after bypassing the steering wheel 93, it is turned back by the steering rollers 94 and connected to the end of the amplitude-increasing trolley 8 departing from the main boom 1, as shown in fig. 4 and 5.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims (10)

1. The utility model provides a scalable tower davit, includes the jib loading boom and installs change width of cloth dolly on the jib loading boom which characterized in that: the crane boom is of a multi-stage telescopic structure and comprises a main boom and a plurality of movable booms which are sequentially and movably connected relative to the main boom, and each movable boom is provided with a telescopic driving device; two parallel and oppositely arranged walking rails are arranged on the main arm and each movable arm, and a connection rail used for being connected with the walking rail positioned on one side of the tip of each walking rail is arranged at the tip of each walking rail;

the variable-amplitude trolley comprises a trolley body, vertical support arms are respectively installed on two opposite sides of the top surface of the trolley body, transverse support arms are fixedly installed on the vertical support arms, a traveling wheel matched with the traveling track is rotatably connected to the free end of each transverse support arm, and a variable-amplitude device used for driving the variable-amplitude trolley to move is further installed on the main arm.

2. The telescopic tower boom of claim 1, wherein: the mounting heights of the walking rails are sequentially reduced from the root parts to the tip parts of the crane booms, and the rail gauge of the walking rails is unchanged; the tip of the connecting track is in smooth transition with the top surface of the walking track positioned on one side below the connecting track.

3. The telescopic tower boom of claim 1, wherein: the amplitude changing device comprises an amplitude contracting winding drum and an amplitude increasing winding drum, and the amplitude contracting winding drum and the amplitude increasing winding drum are both connected with winding motors; the amplitude-reducing coiling drum is fixedly connected with one end, facing the main arm, of the amplitude-reducing trolley through a steel rope, and the steel rope connected to the amplitude-reducing coiling drum is fixedly connected with one end, facing away from the main arm, of the amplitude-reducing trolley after bypassing a steering wheel arranged at the tip of the cargo boom.

4. The telescopic tower boom of claim 1, wherein: the telescopic driving device comprises a telescopic motor, and the telescopic motor drives each movable arm to move through a gear rack transmission mechanism.

5. The telescopic tower boom of claim 1, wherein: each movable arm is provided with a pulley or a sliding block, and the main arm and the corresponding movable arm are provided with sliding rails matched with the pulleys or the sliding blocks.

6. The telescopic tower boom of claim 5, wherein: the cross section of the main arm is triangular, the sliding rails are mounted at three inner corners of the main arm, and the pulleys or the sliding blocks are mounted at three outer corners of the movable arm connected with the main arm.

7. The telescopic tower boom of claim 1, wherein: the number of the movable arms is three, and the telescopic length of each movable arm is 20m, 10m and 5m respectively.

8. The telescopic tower boom of claim 1, wherein: each movable arm is provided with a limiting device, and the limiting devices are used for locking each movable arm.

9. The telescopic tower boom of claim 8, wherein: the limiting device comprises an electromagnet and a limiting pin arranged on the output end of the electromagnet.

10. Telescopic tower boom according to any of claims 1-9, characterized in that: the auxiliary arm is pivotally connected to the tip of the lifting arm, and an auxiliary arm driving device for driving the auxiliary arm to rotate is mounted at the tip of the lifting arm; and a walking track is also arranged on the auxiliary arm.

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