CN215798105U - Boom extension rope tensioning structure, boom and crane - Google Patents

Abstract

The application relates to the technical field of safe driving of cranes, in particular to a boom extension rope tensioning structure, a boom and a crane. The boom rope tensioning structure is used for tensioning a boom rope in the telescopic process of a telescopic boom and mainly comprises a tensioning assembly and a control assembly. Wherein the tensioning assembly comprises a fixed part and a telescopic part. The fixed part is fixedly connected with the telescopic boom, the telescopic part is fixedly connected with the boom rope, and the telescopic part is connected with the fixed part in a sliding manner. At flexible arm in-process, the fixed part is fixed on flexible arm, and the position remains relatively unchangeable, and the pars contractilis can slide for the fixed part, through the slip of pars contractilis, can drive and stretch the removal of arm rope to the length of arm rope is stretched in the change, and the control through control assembly simultaneously can adjust the tensioning degree of stretching the arm rope, appears the extension and the lax possibility in order to reduce the arm rope.

Description

Boom extension rope tensioning structure, boom and crane

Technical Field

The application relates to the technical field of safe driving of cranes, in particular to a boom extension rope tensioning structure, a boom and a crane.

Background

The telescopic mechanism of the rope-row type crane generally comprises an arm extending rope and an arm retracting rope, wherein the arm extending rope and the arm retracting rope are respectively connected with an oil cylinder and an arm frame, and the arm extending rope and the arm retracting rope are driven to move through the extension and retraction of the oil cylinder, so that the arm frame is driven to move, and the extension and retraction of a telescopic arm of the crane are realized.

In the prior art, in the running process of a crane, in the extending process of a telescopic boom, the extending and retracting processes are mainly realized by pulling an arm extending rope and an arm retracting rope through an oil cylinder, and the arm extending rope and the arm retracting rope are kept in a tensioning state for a long time when being pulled, so that when the crane is used for a long time, the arm extending rope can be extended to cause the loosening condition, and the normal use of the telescopic boom is influenced.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present application provides a boom extension rope tensioning structure, a boom, and a crane, which solve or improve the problem that the boom extension rope is extended and loosened during the telescopic boom extension process.

First aspect, the application provides a boom rope tension structure for the tensioning of telescopic boom to the boom rope at flexible in-process, boom rope tension structure includes: a tension assembly; the tensioning assembly comprises: the fixing part is fixedly connected with the telescopic arm; and the telescopic part is connected with the fixed part in a sliding way and is fixedly connected with the arm stretching rope.

The application provides a pair of stretch boom rope tension structure, at the flexible in-process of flexible arm, slide for the fixed part through the expansion part, and the fixed part is fixed on flexible arm, therefore the fixed part can not move, and the expansion part can drive stretch boom rope when sliding for the fixed part and remove, and then adjusts the tensioning degree of stretching the boom rope to reduce stretch boom rope and appear the extension and lax possibility.

In one possible implementation, the boom rope tensioning structure further includes: a control part connected with the tensioning assembly, the control part being configured to detect a tensioning state of the tensioning assembly and control the telescopic part to slide relative to the fixing part to adjust a tensioning degree of the boom rope.

In one possible implementation, the tensioning assembly is: the hydraulic cylinder comprises a cylinder barrel and a hydraulic rod, the cylinder barrel is fixedly connected with the telescopic arm, and the hydraulic cylinder is connected with the cylinder barrel in a sliding manner; and the support is connected to the hydraulic rod and fixedly connected with the boom rope.

In a possible implementation manner, a hydraulic cavity and a hydraulic oil path are arranged in the cylinder barrel, the hydraulic oil path is communicated with the hydraulic cavity to adjust the pressure intensity in the hydraulic cavity, one end of the hydraulic rod is slidably connected in the hydraulic cavity, and the hydraulic rod slides according to the change of the pressure intensity in the hydraulic cavity.

In one possible implementation, the hydraulic lever includes: the piston block is positioned in the hydraulic cavity, the peripheral wall of the piston block is attached to the cavity wall of the hydraulic cavity so as to divide the hydraulic cavity into an extension cavity and a contraction cavity, and the extension cavity is not communicated with the contraction cavity; the hydraulic oil circuit includes: the extending oil path is communicated with the extending cavity; and a contraction oil passage communicated with the contraction cavity.

In one possible implementation, the control means includes: the detection piece is connected with the tensioning assembly to detect the hydraulic pressure in the hydraulic cylinder and send a pressure signal; and the adjusting piece is connected with the hydraulic cylinder and is in communication connection with the detection piece, and the adjusting piece is configured to receive the pressure signal sent by the detection piece and adjust the pressure of the liquid entering the hydraulic cylinder.

In one possible implementation, the control unit further includes: a measuring member configured to measure a stroke of the holder with respect to the cylinder and transmit a stroke signal; and the display device is in communication connection with the measuring piece and is configured to receive and display the travel signal sent by the measuring piece.

In a second aspect, the present application also provides a lift boom, comprising: a fixed arm; the telescopic arm is in telescopic connection with the fixed arm; the arm extending rope is connected with the telescopic arm; the boom extension rope tensioning structure is connected with the fixed arm, and the boom extension rope tensioning structure is connected with the boom extension rope.

The utility model provides a jib loading boom that second aspect provided through setting up the stretching arm rope tension structure, when flexible arm is flexible for the fixed wall, stretching arm rope tension structure adjusts the tensioning degree of stretching arm rope to ensure that the stretching arm rope maintains the tensioning state, ensure flexible arm normal operating.

With reference to the second aspect, in one possible implementation manner, the crane arm further includes: the connecting frame, with stretch the fag end fixed connection of arm rope, flexible cavity has on the connecting frame, stretch arm rope tension structure the fixed part sliding connection be in the flexible cavity, the connecting frame with flexible arm tension structure the pars contractilis fixed connection.

In a third aspect, the present application further provides a crane, including the boom described in the above implementation.

The crane provided by the third aspect of the application ensures normal operation of the crane arm through the arm extending rope tensioning structure in the process of hoisting objects so as to smoothly complete hoisting of the objects.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

Figure 1 shows a schematic view of the arrangement of the tensioning assembly and the rope end of the boom rope in some embodiments of the present application.

Figure 2 is a schematic diagram of the components of the tensioning assembly and control components of some embodiments of the present application.

Figure 3 is a schematic diagram of a tension assembly according to some embodiments of the present application.

Figure 4 is a cross-sectional schematic view of a tension assembly according to some embodiments of the present application.

Fig. 5 shows an enlarged view of the portion a in the implementation shown in fig. 4.

Fig. 6 is a schematic diagram showing the components of the control unit according to some embodiments of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Summary of the application

The boom of a rope-type crane generally comprises a fixed arm, a telescopic arm, a boom extending rope, a boom retracting rope and a hydraulic cylinder. When the object is lifted and transported, the telescopic arm stretches relative to the fixed arm, and the stretching of the hydraulic cylinder drives the telescopic arm rope and the telescopic arm rope to move to complete the object lifting and transporting process.

In the prior art, the arm extending rope and the arm retracting rope are generally steel wire ropes. In particular, the boom rope needs to be kept in a tensioned state during movement when the telescopic boom is extended. Therefore, the arm-extending rope is easy to extend and loose in the long-term use process. In order to solve the problem of looseness of the arm extending rope, the operator is required to detect regularly and adjust timely, so that the normal use of the telescopic arm is prevented from being influenced.

The application provides a stretch arm rope tension structure, jib loading boom and hoist. In the operation process of the crane boom, the tensioning state of the boom extending rope is detected, and the tensioning of the boom extending rope is continuously adjusted according to the tensioning state of the boom extending rope. Therefore, the possibility of loosening of the boom extension rope is reduced, the boom extension rope is ensured to be kept in a tensioning state in the operation process of the boom, and the possibility of failure of the boom is reduced.

Having thus described the principles of operation of embodiments of the present application, various non-limiting embodiments of the present application will now be described with reference to the accompanying drawings.

Exemplary boom cord tensioning arrangement

Figure 1 shows a schematic view of the arrangement of the tensioning assembly and the rope end of the boom rope in some embodiments of the present application. Figure 2 is a schematic diagram of the components of the tensioning assembly and control components of some embodiments of the present application. Referring to fig. 1 and 2, the structure is used for tensioning a boom rope during the telescopic process of a telescopic boom, and specifically comprises: a tensioning assembly 100. The tension assembly 100 includes a fixed portion and a telescoping portion. The fixing part is fixedly connected with the telescopic arm, and the fixing connection mode can be bolt connection or welding. The telescopic part is connected to the fixing part in a sliding mode, the telescopic part is fixedly connected with the boom rope, and the fixed connection mode can be a bolt connection mode.

During operation of the telescopic boom, the tension state of the tensioning assembly 100 changes synchronously with the movement of the boom cord. When the boom rope is loosened, the telescopic part is controlled to slide relative to the fixed part. Because the fixed part is fixed on the telescopic arm, when the telescopic part slides relative to the fixed part, the telescopic arm rope is pulled to move. Therefore, the length of the boom extension rope is changed to adjust the tensioning degree of the boom extension rope, the possibility of looseness of the boom extension rope is reduced, and the boom extension rope is ensured to be kept in a tensioning state in the moving process of the boom extension rope.

In some embodiments of the present application, the tensioning assembly 100 may be any one of a hydraulic cylinder, an electric cylinder, and an air cylinder. The hydraulic cylinder needs to be provided with a hydraulic oil path so as to drive the hydraulic rod to slide through hydraulic pressure change. The electric cylinder needs to be connected with a power supply, and the piston rod slides through electric driving. And the air cylinder needs to be connected with an air source so as to drive the piston rod to move through air pressure. The specific tensioning assembly 100 is a hydraulic cylinder, an electric cylinder or an air cylinder, which can be selected according to the actual installation situation, and the specific form of the tensioning assembly 100 is not limited in this embodiment.

Referring to fig. 2, in some embodiments of the present application, the boom rope tensioning structure further includes a control unit 200. The control part 200 is connected with the tension assembly 100, and the control part 200 is configured to detect a tension state of the tension assembly 100 and control the expansion part to slide relative to the fixed part to adjust a tension degree of the boom cord.

During the movement of the telescopic boom, the tension state of the tension assembly 100 is checked in real time by the control part 200, thereby judging the tension degree of the boom rope. When the tensioning degree of the arm stretching rope needs to be improved, the automatic control expansion part slides relative to the fixing part so as to adjust the tensioning degree of the arm stretching rope in a targeted manner.

Figure 3 is a schematic diagram of a tension assembly according to some embodiments of the present application. Figure 4 is a cross-sectional schematic view of a tension assembly according to some embodiments of the present application. Referring to fig. 3 and 4, the tension assembly 100 includes a hydraulic cylinder 110 and a bracket 120. The hydraulic cylinder 110 includes a cylinder 111 and a hydraulic rod 112, the cylinder 111 is fixedly connected to the telescopic arm, and the hydraulic cylinder 112 is slidably connected to the cylinder 111. The hydraulic rod 112 is fixedly connected with the support 120, and one end of the support 120 far away from the hydraulic rod 112 is fixedly connected with the boom rope.

When the tension degree of the arm extending rope is adjusted by moving the rope end of the arm extending rope, the hydraulic rod 112 is pushed to extend and retract by adjusting the change of the oil pressure in the cylinder 111, and the support 120 is driven to move when the hydraulic rod 112 extends and retracts. The support 120 and the boom rope are fixed, so the boom rope moves along with the movement of the support 120, and the adjustment of the length of the boom rope is smoothly completed.

Fig. 5 shows an enlarged view of the portion a in the implementation shown in fig. 4. Referring to fig. 5, the cylinder 111 has a hydraulic chamber 113 and a hydraulic oil passage 114 therein. The hydraulic oil passage 114 communicates with the hydraulic pressure chamber 113 to adjust the pressure in the hydraulic pressure chamber 113. The cylinder body 111 is provided with a cylinder end cover 1133 for closing the hydraulic chamber 113. Hydraulic rod 112 is slidably connected within the hydraulic pressure through cylinder end cap 1133 to slide in response to changes in pressure within hydraulic chamber 113.

When the hydraulic rod 112 is driven to slide, the pressure in the hydraulic cavity 113 is changed through the hydraulic oil path 114, and the hydraulic rod 112 slides back and forth in the hydraulic cavity 113 along with the change of the pressure, so that the telescopic sliding of the hydraulic rod 112 is realized.

Referring to FIG. 5, in some embodiments of the present application, hydraulic ram 112 includes a piston block 1120. The piston block 1120 is located in the hydraulic pressure chamber 113, and the peripheral wall of the piston block 1120 is attached to and in sliding fit with the chamber wall of the hydraulic pressure chamber 113. The piston block 1120 divides the hydraulic pressure chamber 113 into an extension chamber 1131 and a contraction chamber 1132, and the extension chamber 1131 and the contraction chamber 1132 are not communicated with each other. Hydraulic circuit 114 includes an extension circuit 1141 and a retraction circuit 1142. The protruding oil path 1141 communicates with the protruding chamber 1131, and the retracting oil path 1142 communicates with the retracting chamber 1132.

When the driving hydraulic rod 112 is extended, oil is injected into the extension cavity 1131 through the extension oil passage 1141 to increase the pressure inside the extension cavity 1131. The oil in the contraction chamber 1132 is discharged through the contraction oil path 1142, and the pressure in the contraction chamber 1132 is reduced. The pressure in the extension cavity 1131 will push the piston block 1120 to compress the contraction cavity 1132, so as to push the hydraulic rod 112 to extend smoothly. When the driving hydraulic rod 112 is contracted, the principle is the same as that of the driving hydraulic rod 112 being extended, and the details are not described here.

Referring to fig. 3, in some embodiments of the present invention, the cylinder 111 has a mounting groove 1110 on the outer surface thereof, and the head of the arm-extending rope is fixed in the mounting groove 1110. The installation groove 1110 is beneficial to increasing the connection area of the arm extension rope and the cylinder 111, so as to improve the connection strength of the arm extension rope and the cylinder 111. Meanwhile, a plurality of rope ends of the arm stretching ropes can be arranged in the mounting groove 1110 according to different arm stretching rope structures.

Referring to fig. 3, in some embodiments of the present application, the cylinder 111 is in an i-shape, and in this case, the cylinder 111 includes a cylinder body and two sliding blocks, the two sliding blocks are respectively disposed at two ends of the cylinder body to form an i-shape, the sliding blocks are slidably connected to the telescopic arm, a cavity is disposed in the cylinder body, the hydraulic rod 112 is partially slidably connected in the cavity, and a portion of the hydraulic rod 112 extending out of the cavity is fixedly connected to the support 120. The cross-sectional area of the cylinder is smaller than that of the sliders, and the mounting groove 1110 is formed by enclosing the side wall of the cylinder and the opposite side surfaces of the two sliders.

Fig. 6 is a schematic diagram showing the components of the control unit according to some embodiments of the present application. Referring to fig. 6, the control part 200 includes: a detecting member 210 and an adjusting member 220. A sensing member 210 is coupled to the tensioner assembly 100, the sensing member 210 being configured to sense the hydraulic pressure within the hydraulic cylinder 110 and send a pressure signal. The adjustment member 220 is coupled to the hydraulic cylinder 110, and the adjustment member 220 is also communicatively coupled to the sensing member 210, the adjustment member 220 being configured to receive the pressure signal from the sensing member 210 and to adjust the hydraulic pressure entering the hydraulic cylinder 110.

When the boom cable moves, the support 120 is pulled by the boom cable because the boom cable is connected to the support 120, and the support 120 is fixedly connected to the hydraulic rod 112. The hydraulic rod 112 does not move due to the hydraulic pressure in the cylinder 111. And thus the holder 120 does not move. At this time, by detecting the hydraulic pressure in the cylinder 111, the tension of the boom rope on the support 120 can be detected, so that the tension can be used for judging the tension degree of the boom rope.

When the sensing member 210 senses the hydraulic pressure and sends a pressure signal to the adjusting member 220, and the adjusting member 220 receives the pressure signal, the adjusting member 220 adjusts the hydraulic pressure in the hydraulic cylinder 110 according to the pressure signal, thereby changing the position of the hydraulic rod 112. When the hydraulic rod 112 moves, the support 120 is driven to move, and the support 120 generates a pulling force on the rope end of the arm stretching rope, so that the tensioning degree of the arm stretching rope is adjusted.

In some embodiments of the present application, the sensing member 210 may be a pressure sensor. The pressure sensor detects the hydraulic pressure in the cylinder 111 to generate a pressure signal. Wherein the pressure signal represents the tension degree of the arm stretching rope.

In some embodiments of the present application, the adjusting member 220 may be a pressure regulating valve. A hydraulic oil path may be provided outside the hydraulic cylinder 110, the hydraulic oil path communicates with the cylinder 111 to supply hydraulic pressure into the cylinder 111, and the pressure regulating valve is provided between the cylinder 111 and the hydraulic oil path.

Referring to fig. 6, in some embodiments of the present application, the control unit 200 further includes a measuring member 230 and a display device 240. The measuring member 230 is configured to measure the formation of the carrier 120 relative to the cylinder 111 and to transmit a stroke signal. The display device 240 is communicatively coupled to the measuring member 230, and the display device 240 is configured to receive and display a stroke signal generated by the measuring member 230.

When the end of the arm-extending rope is adjusted to move, the measuring part 230 can detect the stroke of the support 120 in real time and send a stroke signal, and the display device 240 displays the stroke signal in real time. The stroke signal indicates the moving distance of the support 120 relative to the cylinder 111, that is, the moving distance of the rope end of the arm-extending rope, and the strength of the arm-extending rope can be known through the moving distance, so as to detect the strength of the arm-extending rope.

In some embodiments of the present application, the measuring member 230 may be a distance sensor that generates a travel signal by detecting a change in distance between the support 120 relative to the cylinder 111. The display device 240 may be a display lamp that lights up when the travel signal exceeds a preset range, prompting the operator to detect the strength of the boom rope. The display device 240 may also be a display screen that can display the stroke signal to determine the moving distance of the cylinder 111.

The working principle of the embodiment is as follows:

when the telescopic boom needs to move, the hydraulic cylinder 110 drives the boom extension rope to move, and the boom extension rope drives the telescopic boom to extend and retract. In the moving process of the boom extension rope, the rope end of the boom extension rope is fixedly connected with the support 120, so that the boom extension rope generates pulling force on the support 120. The support 120 is fixedly connected to the hydraulic rod 112, the hydraulic rod 112 is slidably connected to the cylinder 111, and the hydraulic rod 112 does not move when the hydraulic pressure inside the cylinder 111 remains. And thus the holder 120 does not move. Therefore, the tension of the boom rope on the cylinder 111 can be judged by detecting the hydraulic pressure in the cylinder 111 by the detector 210, so that the tension degree of the boom rope can be judged. The pressure signal generated by the sensing member 210 may thus be indicative of the degree of tensioning of the boom cord.

The adjusting member 220 adjusts the hydraulic pressure in the cylinder 111 according to the pressure signal after receiving the pressure signal. When the hydraulic pressure changes, the hydraulic rod 112 moves along with the change of the hydraulic pressure to move the support 120. The support 120 pulls the rope end of the boom rope when moving, so as to generate a pulling force on the boom rope, thereby smoothly adjusting the tension degree of the boom rope.

When the tensioning degree of the arm stretching rope is adjusted, the distance between the support 120 and the cylinder 111 can be measured through the measuring piece 230, so that the moving distance of the rope end of the arm stretching rope is determined, and the moving distance of the rope end of the arm stretching rope is displayed in real time, so that the operator can confirm the strength of the arm stretching rope.

Exemplary boom

This jib loading boom includes: a fixed arm, a telescopic arm, a boom rope and the boom rope tensioning structure described in any of the above embodiments. The telescopic boom is in telescopic connection with the fixed part, the boom rope is arranged between the fixed wall and the telescopic boom, and the boom rope tensioning structure is respectively connected with the fixed wall and the boom rope.

When the cargo boom operates, the telescopic boom is driven by the boom stretching rope to stretch relative to the fixed boom, and the tensioning degree of the boom stretching rope is adjusted through the boom stretching rope tensioning structure, so that the boom stretching rope is kept in a tensioning state when the telescopic boom stretches relative to the fixed boom, and the normal operation of the cargo boom is ensured.

Since the boom is provided with the boom rope tensioning structure, the boom has all the technical effects of the boom rope tensioning structure, which are not described herein again.

In some embodiments of the present application, the boom further includes a connection frame 300. The connecting frame 300 is fixedly connected with the rope end of the arm stretching rope. One end of the connecting frame 300 far from the arm stretching rope is provided with a telescopic cavity, the fixing part of the tensioning assembly 100 is connected in the telescopic cavity in a sliding mode, and the fixing part is located between the rope head and the telescopic part of the arm stretching rope. The telescopic part is positioned in the telescopic cavity and is fixedly connected with the cavity wall of the telescopic cavity.

When the arm rope is stretched in the pulling and moves, the telescopic part slides relative to the fixing part, so that the connecting frame 300 is pulled to move, the fixing part slides in the telescopic cavity relatively, and the arm rope is stretched in the pulling of the connecting frame 300 to move, so that the arm rope is stretched smoothly.

Referring to fig. 1 and 3, in some embodiments of the present application, the tensioning assembly 100 is a hydraulic cylinder 110, the fixed portion is a cylinder 111, and the telescoping portion is a hydraulic rod 112. The connecting frame 300 is inserted into the mounting groove 1110, the support 120 is located in the telescopic cavity, and the support 120 is fixed to the wall of the telescopic cavity by bolts.

Exemplary Crane

The crane comprises a boom as described in the above embodiments.

When the crane boom is used for hoisting objects, the normal operation of the crane boom is ensured through the boom extension rope tensioning structure.

Since the crane is provided with the boom, the crane has all the technical effects of the boom, and the detailed description is omitted here.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

Claims (10)

1. A boom rope tensioning structure for tensioning a boom rope in a telescopic process of a telescopic boom, which is characterized by comprising:

a tensioning assembly (100);

the tensioning assembly (100) comprises:

the fixing part is fixedly connected with the telescopic arm; and

the telescopic part is connected with the fixed part in a sliding mode and fixedly connected with the arm stretching rope.

2. The boom rope tensioning structure according to claim 1, further comprising:

a control part (200) connected with the tensioning assembly (100), the control part (200) being configured to detect a tensioning state of the tensioning assembly (100) and control the telescopic part to slide relative to the fixed part to adjust a tensioning degree of the boom cord.

3. The boom rope tension structure as claimed in claim 2, wherein the tension assembly (100) is:

the hydraulic cylinder (110) comprises a cylinder barrel (111) and a hydraulic rod (112), the cylinder barrel (111) is fixedly connected with the telescopic arm, and the hydraulic cylinder (110) is connected with the cylinder barrel (111) in a sliding mode; and

and the support (120) is connected to the hydraulic rod (112), and the support (120) is fixedly connected with the arm extending rope.

4. The boom rope tension structure according to claim 3, wherein a hydraulic pressure chamber (113) and a hydraulic pressure oil path (114) are provided in the cylinder (111), the hydraulic pressure oil path (114) communicates with the hydraulic pressure chamber (113) to adjust the pressure in the hydraulic pressure chamber (113), one end of the hydraulic rod (112) is slidably connected in the hydraulic pressure chamber (113), and the hydraulic rod (112) slides according to the change of the pressure in the hydraulic pressure chamber (113).

5. The boom rope tension structure according to claim 4, wherein the hydraulic lever (112) includes:

the piston block (1120) is positioned in the hydraulic cavity (113), the peripheral wall of the piston block (1120) is attached to the cavity wall of the hydraulic cavity (113) so as to divide the hydraulic cavity (113) into an extension cavity (1131) and a contraction cavity (1132), and the extension cavity (1131) and the contraction cavity (1132) are not communicated with each other;

the hydraulic oil path (114) includes:

an extension oil passage (1141) communicating with the extension chamber (1131); and

a retraction oil path (1142) in communication with the retraction cavity (1132).

6. The boom rope tension structure according to claim 3, wherein the control part (200) includes:

a sensing member (210) connected to the tensioning assembly (100) to sense hydraulic pressure within the hydraulic cylinder (110) and send a pressure signal; and

an adjusting member (220) connected to the hydraulic cylinder (110), wherein the adjusting member (220) is in communication with the sensing member (210), and wherein the adjusting member (220) is configured to receive the pressure signal from the sensing member (210) and adjust the pressure of the fluid entering the hydraulic cylinder (110).

7. The boom rope tension structure according to any one of claims 3 to 6, wherein the control part (200) further comprises:

a measuring member (230) configured to measure the stroke of the support (120) with respect to the cylinder (111) and to send a stroke signal; and

a display device (240) in communication connection with the measuring member (230), the display device (240) being configured to receive and display the travel signal sent by the measuring member (230).

8. A boom, characterized in that the boom comprises:

a fixed arm;

the telescopic arm is in telescopic connection with the fixed arm;

the arm extending rope is connected with the telescopic arm;

the boom cord tensioning structure as claimed in any one of claims 1 to 7, being connected with the fixed arm, and being connected with the boom cord.

9. The boom of claim 8, further comprising:

connecting frame (300), with stretch the fag end fixed connection of arm rope, flexible cavity has on connecting frame (300), stretch arm rope tension structure fixed part sliding connection be in the flexible cavity, connecting frame (300) with flexible arm tension structure flexible portion fixed connection.

10. A crane, comprising:

the boom of claim 8 or 9.

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