CN202519993U

Movatterモバイル変換

Info

Publication number: CN202519993U
Application number: CN 201220027744
Authority: CN
Inventors: 郑永生; 王磊磊; 蔡克强
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Priority date: 2012-01-21
Filing date: 2012-01-21
Publication date: 2012-11-07
Anticipated expiration: 2022-01-21

Abstract

The utility model discloses a telescopic placing boom mechanism and a concrete pump truck, and relates to the technical field of engineering machinery. The telescopic placing boom mechanism and the concrete pump truck resolves the technical problems that in the prior art, occupied space of structure and needed space of extending of arm supports are both large, and material distribution is not flexible enough. The telescopic placing boom mechanism comprises a telescopic arm, a fixing arm and a pipeline, wherein the telescopic arm is embedded inside the fixing arm or the telescopic arm is sleeved outside the fixing arm. The length direction of the telescopic arm is overlapped or parallel with the length direction of the fixing arm, and an end portion of the telescopic arm in the length direction can extend out or retract along the length direction of the fixing arm. The pipeline is formed by movable connection of more than two pipe fittings, and a pipe fitting located on a material inlet of the pipeline and a pipe fitting located on a material outlet of the pipeline are respectively in fixed connection with the fixing arm and the telescopic arm; or the pipeline is a flexible pipe fitting made of telescopic materials. The concrete pump truck comprises the telescopic placing boom mechanism. The telescopic placing boom mechanism and the concrete pump truck are used for reducing the size of a placing boom mechanism.

Description

Telescopic distributing rod mechanism and concrete pump truck

Technical Field

The utility model relates to an engineering machine tool technical field, concretely relates to flexible cloth beam mechanism and set up concrete pump truck of this flexible cloth beam mechanism.

Background

The concrete pump truck is an engineering machine for conveying commercial concrete to a specified position. A material distributing rod system is arranged in the concrete pump truck. The material distributing rod system is mainly used for conveying and distributing concrete, and the material distributing rod system stretches the arm support oil cylinder and rotates the rotary table to directly convey the concrete to a position pointed by the tail end of the arm support, namely a pouring point, through a conveying pipe attached to the arm support. The delivery pipe is rigidly connected to the boom through a bracket for delivering concrete or other fluid.

As shown in fig. 1, the conventional concrete pump truck material distribution boom system is composed of a

multi-section boom

12, 17, 111, 115, a connecting

rod

14, 16, 19, 110, 114, 113, an

oil cylinder

11, 15, 18, 112, adelivery pipe 116, anend hose 117 and the like, and the rotation between the booms is completed through a shaft sleeve at the connecting part. Each section of arm is of a box-shaped structure and is formed by welding steel plates with different plate thicknesses. The arm sections are hinged through connecting

rods

14, 16, 19 and 110, apin shaft 13 and

oil cylinders

11, 15, 18 and 112, and a four-bar mechanism formed by the connecting rods and the arm frame can realize the relative rotation of the arm frame under the driving of the oil cylinders.

Its function mainly has three parts:

1. the arm support and the arm support are connected and supported to obtain a certain material distribution space;

2. the concrete conveying pipe is attached to the arm support through the connecting support, and the arm support plays a role in supporting and fixing the concrete conveying pipe;

3. mutual motion between the jibs is realized through a variable amplitude mechanism (using a variable amplitude oil cylinder) between the jibs, and the arm support is folded and unfolded in a bionic robot hand mode.

As shown in fig. 2, in the conventional concrete pump truck material distribution boom system, aboom 21 and aboom 22 are hinged by a pin. Theconveying pipe 24 is fixed on thearm support 21 and the arm support 22 through a connectingsupport 23. The dotted lines in fig. 2 indicate the rotational axes between theboom 21, theboom 22 and between theadjacent conveying pipes 25. Theadjacent conveying pipes 25 are hinged in the same way and share the same rotation axis with the arm support. The conveying pipe hinge structure is realized by two 90-degree bent pipes 25. Thepipe clamp 26 is used for connecting two adjacent conveying pipes and does not limit the rotation of thepipe clamp 26 along the axis. Therefore, the luffing mechanism between thearm support 21 and thearm support 22 realizes the mutual movement between the joint arms, and the arm support is folded and unfolded in a bionic robot mode. Meanwhile, the conveying pipe fixed on the conveying pipe is synchronously folded and unfolded.

The existing concrete pump truck material distribution rod system has at least the following disadvantages:

1. the structure occupies a large space. The traditional distributing rod mechanism is folded, and the total occupied space is the sum of the volumes of all arm supports. And the space between the arm support and the arm support is narrow, so that mutual interference is easy to occur.

2. The space required by the arm support to unfold is large, and the arm support is not suitable for certain special working conditions limited by the space.

3. The cloth is not flexible enough. Limited by the length of the arm support, the tiny change of the position of the material distribution end is usually realized by the linkage extension and additional rotation of a plurality of sections of arms.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flexible cloth beam mechanism and set up concrete pump truck of this flexible cloth beam mechanism. The technical problems that the structure occupies a large space, the space required by the cantilever crane to be unfolded is large, and the material distribution is not flexible in the prior art are solved.

In order to achieve the above purpose, the utility model provides a following technical scheme:

this concertina cloth lever mechanism, including flexible arm, fixed arm and pipeline, wherein:

the telescopic arm is embedded in the fixed arm, or the telescopic arm is sleeved outside the fixed arm;

the length direction of the telescopic arm is coincident with or parallel to the length direction of the fixed arm, and the end part of the telescopic arm in the length direction can extend out or retract along the length direction of the fixed arm;

the pipeline is formed by movably connecting more than two pipe fittings, and the two pipe fittings positioned at the material inlet and the material outlet of the pipeline are respectively and fixedly connected with the fixed arm and the telescopic arm; alternatively, the conduit is a flexible tube made of a stretchable material.

Preferably, the fixed arm is a hollow structure formed by bending a plate, and the telescopic arm is embedded in the fixed arm.

Preferably, the pipeline includes first pipe fitting, second pipe fitting, third pipe fitting, fourth pipe fitting, fifth pipe fitting and the sixth pipe fitting that communicates in proper order, wherein:

the first pipe fitting and the sixth pipe fitting are fixedly connected with the telescopic arm and the fixed arm respectively, the first pipe fitting and the sixth pipe fitting are straight pipes, and the axial directions of the first pipe fitting and the sixth pipe fitting are parallel to the length direction of the telescopic arm;

the second pipe fitting and the fifth pipe fitting are both elbow pipes provided with a right-angle bending part, the axial direction of one of the two ports of each pipe fitting is perpendicular to the length direction of the telescopic arm, and the axial direction of the other port of each pipe fitting is parallel to the length direction of the telescopic arm;

the third pipe fitting and the fourth pipe fitting are both elbow pipes provided with two right-angle bending parts, and the axial directions of two ports of the third pipe fitting and the fourth pipe fitting are both vertical to the length direction of the telescopic arm;

the two ports of the third pipe fitting and the fourth pipe fitting can rotate around the respective axial lines of the ports.

Preferably, this telescopic cloth lever mechanism still include with flexible fly jib of flexible arm fixed connection, wherein:

the first pipe fitting is fixedly connected with the telescopic auxiliary arm, or the first pipe fitting and the telescopic auxiliary arm are of an integrated structure;

a guide structure is arranged between the telescopic auxiliary arm and the fixed arm, and the telescopic auxiliary arm can translate on the fixed arm along the length direction of the fixed arm through the guide structure.

Preferably, a fixed bracket is further arranged between one end of the telescopic auxiliary arm and one end of the telescopic arm far away from the fixed arm, and the telescopic auxiliary arm and the telescopic arm are fixedly connected together through the fixed bracket; and/or the presence of a gas in the gas,

the telescopic auxiliary arm is rod-shaped, wherein:

the guide structure is a roller fixedly arranged on the telescopic auxiliary arm, one side of the roller is abutted against the outer surface of the fixed arm, and the roller can roll on the outer surface of the fixed arm along the length direction of the fixed arm; or,

the guide structure comprises a guide rail fixedly arranged on the outer surface of one of the telescopic auxiliary arm and the fixed arm and a guide groove arranged on the outer surface of the other one of the telescopic auxiliary arm and the fixed arm, and the guide rail is embedded in the guide groove and can slide in the guide groove along the length direction of the telescopic arm.

Preferably, the first pipe element is fixed to the telescopic sub-arm by means of at least one clip.

Preferably, the first pipe fitting and the second pipe fitting are fixedly connected, or the first pipe fitting and the second pipe fitting are of an integrated structure;

and/or the fifth pipe fitting is fixedly connected with the sixth pipe fitting, or the fifth pipe fitting and the sixth pipe fitting are of an integrated structure;

and/or the first pipe fitting, the second pipe fitting, the third pipe fitting and the fourth pipe fitting are communicated with each other and/or the fifth pipe fitting and the sixth pipe fitting are communicated with each other through pipe clamps.

Preferably, a connecting column is further arranged between the pipe clamp and the telescopic auxiliary arm between the second pipe fitting and the third pipe fitting, and the connecting column is fixedly connected with the pipe clamp and the telescopic auxiliary arm respectively;

and/or a positioning seat is fixedly arranged on the fixed arm, a mounting hole is formed in the positioning seat, and one port of the fourth pipe fitting is embedded in the mounting hole and communicated with one port of the fifth pipe fitting through the mounting hole.

Preferably, the conduit comprises a first tube and a second tube, wherein:

the first pipe fitting is fixedly connected with the telescopic arm, and the second pipe fitting is fixedly connected with the fixed arm;

the first pipe is embedded in the second pipe and is in liquid-tight connection with the second pipe, or the first pipe is sleeved outside the second pipe and is in liquid-tight connection with the second pipe;

the axial direction of the first pipe fitting is parallel to the length direction of the telescopic arm and the axial direction of the second pipe fitting, and the end part of the first pipe fitting in the axial direction can extend out or retract along the axial direction of the second pipe fitting.

This mobile concrete pump, including power unit and the embodiment of the utility model provides a flexible cloth pole mechanism, wherein:

the power mechanism provides power for the telescopic arm in the telescopic cloth rod mechanism to extend or retract along the length direction of the fixed arm.

Preferably, the power mechanism is a telescopic oil cylinder.

Based on any one of above-mentioned technical scheme, the embodiment of the utility model provides a can produce following technological effect at least:

in the telescopic cloth rod mechanism provided by the utility model, no matter the telescopic arm is embedded in the fixed arm or the telescopic arm is sleeved outside the fixed arm, because the length direction of the telescopic arm is coincident or parallel to the length direction of the fixed arm, and the end part of the telescopic arm in the length direction can extend or retract along the length direction of the fixed arm, when the telescopic arm extends or retracts along the length direction of the fixed arm, the telescopic arm drives the pipeline to extend or retract together, thereby realizing the function of pipeline cloth;

and simultaneously, the utility model discloses a flexible cloth rod mechanism have following advantage at least:

1. the connection mode between the arm support (namely the fixed arm and the telescopic arm) adopts an embedded telescopic type or an outer sleeve telescopic type, so that the occupied volume of the structure is greatly reduced, and the weight of the arm support is reduced.

2. The required space is small in the boom extension process, and the telescopic boom is suitable for the working condition with narrow space. When the material distribution position is finely adjusted, the material distribution is more flexible by adopting an axial telescopic mode driven by an oil cylinder compared with a cantilever crane rotating mode in the prior art.

3. Compared with the amplitude cylinder that uses among the prior art in the cloth beam mechanism, the utility model discloses well flexible arm can directly stretch out or return back, and flexible arm does not adopt hinge structure, so under the state that the hydro-cylinder drove flexible arm and stretches out, the utility model discloses well hydro-cylinder stretches out working stroke shorter, so the utility model discloses well hydro-cylinder can select the hydro-cylinder of little bore, little discharge capacity, has not only reduced the cost and has still reduced the total weight of flexible cloth beam mechanism.

It is from top to bottom visible, the utility model provides a prior art have structure occupation space and cantilever crane expand the technical problem that the required space is all great and the cloth is not nimble enough.

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 perspective view showing the connection relationship between the main components of a material distributing boom system of a conventional concrete pump truck and the connection relationship between the components in the material distributing boom system after being enlarged;

FIG. 2 is a perspective view of the connection between the distribution rod and the transport pipe shown in FIG. 1;

fig. 3 is a schematic perspective view of a part of a telescopic cloth rod mechanism according to an embodiment of the present invention;

FIG. 4 is a plan view of the telescopic distribution bar mechanism A shown in FIG. 3;

fig. 5 is a plan view of the telescopic distribution rod mechanism B shown in fig. 3.

Detailed Description

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

The embodiment of the utility model provides a structure occupation space is little, the flexible convenience of use just consumes the material few flexible distributing boom mechanism and sets up the mobile concrete pump of this flexible distributing boom mechanism.

As shown in fig. 3, 4 and 5, the telescopic cloth rod mechanism provided by the embodiment of the present invention includes atelescopic arm 32, a fixedarm 31 and apipeline 33, wherein:

thetelescopic arm 32 is embedded in the fixedarm 31, the length direction of thetelescopic arm 32 is coincident with or parallel to the length direction of the fixedarm 31, and the end part of thetelescopic arm 32 in the length direction can extend out or retract along the length direction of the fixedarm 31;

thepipeline 33 is formed by movably connecting more than two pipe fittings, and the two pipe fittings positioned at the material inlet and the material outlet of thepipeline 33 are respectively and fixedly connected with the fixedarm 31 and thetelescopic arm 32.

In the telescopic cloth rod mechanism provided by the utility model, no matter thetelescopic arm 32 is embedded in the fixedarm 31, or thetelescopic arm 32 is externally sleeved outside the fixedarm 31, because the length direction of thetelescopic arm 32 coincides or is parallel to the length direction of the fixedarm 31, and the end part of thetelescopic arm 32 in the length direction can extend or retract along the length direction of the fixedarm 31, when thetelescopic arm 32 extends or retracts along the length direction of the fixedarm 31, thetelescopic arm 32 drives thepipeline 33 to extend or retract together, thereby realizing the function of distributing thepipeline 33;

meanwhile, the boom (namely the fixedarm 31 and the telescopic arm 32) is connected in an embedded telescopic manner or an outer telescopic manner, so that the occupied volume of the structure is greatly reduced, the weight of the boom is reduced, and the boom is small in required space in the telescopic process and suitable for the working condition with narrow space. When the material distribution position is finely adjusted, the material distribution is more flexible by adopting an axial telescopic mode driven by an oil cylinder compared with a cantilever crane rotating mode in the prior art.

Of course, theconduit 33 may also be a flexible tube of stretchable material. The flexible pipe member constituting theduct 33 may be one or a plurality of flexible pipe members. At this time, as long as it is ensured that the flexible pipe has sufficient allowance or flexibility, thepipeline 33 can move along with the extension or retraction of thetelescopic arm 32, and further, the distribution of thepipeline 33 can be realized.

In this embodiment, the fixingarm 31 is a hollow structure formed by bending a plate, and thetelescopic arm 32 is embedded in the fixingarm 31. This configuration not only saves material, contributes to reduction in weight and volume of the fixingarm 31, but also facilitates manufacturing, and the assembling operation between the fixingarm 31 and thetelescopic arm 32 is easy.

Of course, in this embodiment, thetelescopic arm 32 may be externally sleeved outside the fixedarm 31, or thetelescopic arm 32 may be partially externally sleeved outside the fixedarm 31 and partially embedded inside the fixedarm 31.

Thepipeline 33 in this embodiment includes afirst pipe 331, asecond pipe 332, athird pipe 333, afourth pipe 334, a fifth pipe 335, and asixth pipe 336 that are sequentially connected to each other, wherein:

thefirst tube 331 and thesixth tube 336 are respectively fixedly connected with thetelescopic arm 32 and the fixingarm 31, and thefirst tube 331 and thesixth tube 336 are both straight tubes, and their respective axial directions are parallel to the length direction of thetelescopic arm 32;

thesecond tube 332 and the fifth tube 335 are both elbow tubes provided with a right-angle bending part, and the axial direction of one of the two respective ports is perpendicular to the length direction of thetelescopic arm 32, and the axial direction of the other port is parallel to the length direction of thetelescopic arm 32;

thethird pipe 333 and thefourth pipe 334 are both elbow pipes provided with two right-angle bending parts, and the axial directions of the two respective ports of thethird pipe 333 and thefourth pipe 334 are both perpendicular to the length direction of thetelescopic arm 32;

both ports of thethird pipe 333 and thefourth pipe 334 are rotatable around the respective axes of the ports.

When the two ports of thethird pipe 333 and thefourth pipe 334 are both rotatable around the respective axes of the ports, the two ports of thethird pipe 333 and the two ports of thefourth pipe 334 form three hinge points, and the three hinge points pass through the respective rotation axes (shown by dotted lines in fig. 4), so that thepipe 33 can be extended longer.

This telescopic cloth lever mechanism in this embodiment also includes theflexible fly jib 34 withflexible arm 32 fixed connection, wherein:

thefirst pipe 331 is fixedly connected with the telescopicauxiliary arm 34, or thefirst pipe 331 and the telescopicauxiliary arm 34 are of an integrated structure;

aguide structure 35 is arranged between the telescopicauxiliary arm 34 and the fixedarm 31, and the telescopicauxiliary arm 34 can translate on the fixedarm 31 along the length direction of the fixedarm 31 through theguide structure 35.

The arrangement of the telescopicauxiliary arm 34 increases the installation space of thetelescopic arm 32 in which parts can be installed, and meanwhile, the telescopicauxiliary arm 34 and thetelescopic arm 32 embedded in the fixedarm 31 bear relatively uniform reaction force from the fixedarm 31 in the process that the telescopicauxiliary arm 34 translates on the outer surface of the fixedarm 31 along the length direction of the fixedarm 31 through theguide structure 35, which is beneficial to improving the stability of the telescopic motion of thetelescopic arm 32 and the telescopicauxiliary arm 34.

In this embodiment, a fixing bracket 38 is further disposed between one end of thetelescopic sub-arm 34 and one end of thetelescopic arm 32 away from the fixingarm 31, and thetelescopic sub-arm 34 and thetelescopic arm 32 are fixedly connected together through the fixing bracket 38.

The fixed bracket 38 is fixedly connected to thetelescopic sub-arm 34 and thetelescopic arm 32, respectively. The fixed connection between the fixed bracket 38 and thetelescopic sub-arm 34 or between the fixed bracket 38 and thetelescopic arm 32 can be welded or screwed (the fixed bracket 38 is threaded or matched with a screw or a bolt).

Thetelescopic sub-arm 34 in this embodiment is rod-shaped, wherein:

the guidingstructure 35 is a roller 39 fixed on the telescopicauxiliary arm 34, the roller 39 is abutted against one side outer surface of the fixingarm 31, and the roller 39 can roll on the outer surface of the fixingarm 31 along the length direction of the fixingarm 31.

The friction force of the rolling friction is much smaller than that of the sliding friction, so the structure can effectively reduce the friction force between the telescopicauxiliary arm 34 and the fixedarm 31.

Of course, in this embodiment, the guidingstructure 35 may also include a guiding rail fixedly disposed on an outer surface of one of thetelescopic sub-arm 34 and the fixingarm 31, and a guiding groove opened on an outer surface of the other of thetelescopic sub-arm 34 and the fixingarm 31, and the guiding rail is embedded in the guiding groove and can slide in the guiding groove along the length direction of thetelescopic arm 32. This configuration may also serve to improve the smoothness of the telescopic movement oftelescopic boom 32 andtelescopic sub-boom 34.

In this embodiment thefirst tube member 331 is secured to thetelescopic sub-arm 34 by at least oneclip 310.

Theclamp 310 is convenient to mount and firm in positioning. The number of thebands 310 may be determined according to the length of thefirst pipe member 331 in the axial direction and the weight thereof. In this embodiment, the number of thebands 310 is two, and the bands are uniformly distributed on thefirst pipe 331.

Of course, thefirst pipe member 331 may be fixed to thetelescopic sub-arm 34 by using a connecting structure other than the clip 310 (for example, a bolt or a screw).

In this embodiment, thefirst pipe 331 is fixedly connected to thesecond pipe 332, and/or the fifth pipe 335 is fixedly connected to thesixth pipe 336. Since there is no relative movement between the first and second

tubular members

331, 332, they are preferably fixedly connected together. Of course, thefirst tube 331 and thesecond tube 332 can be an integral structure; the fifth pipe member 335 and thesixth pipe member 336 can also be an integral structure.

In this embodiment, thefirst pipe 331, thesecond pipe 332, thethird pipe 333, and thefourth pipe 334 and/or the fifth pipe 335 and thesixth pipe 336 are connected to each other by apipe clamp 36.

Thepipe clamp 36 is a part specially used for connecting pipe fittings, and can connect passages of different pipe fittings for conveying materials, and meanwhile, can enable the pipe fitting connected with the pipe clamp to rotate relative to the axis line of the pipe clamp.

In this embodiment, aconnection column 311 is further disposed between thepipe clamp 36 and thetelescopic sub-arm 34 between thesecond pipe 332 and thethird pipe 333, and theconnection column 311 is respectively and fixedly connected (specifically, welded or screwed) with thepipe clamp 36 and thetelescopic sub-arm 34.

The connectingcolumn 311 supports thepipe clamp 36 between thesecond pipe 332 and thethird pipe 333 on the one hand, and prevents thesecond pipe 332 from moving relative to thetelescopic sub-arm 34 on the other hand.

In this embodiment, the fixingarm 31 is further fixedly provided with apositioning seat 312, thepositioning seat 312 is provided with a mounting hole, and a port of thefourth pipe 334 is embedded in the mounting hole and is communicated with a port of the fifth pipe 335 through the mounting hole.

Thepositioning seat 312 and theconnection column 311 have similar functions, the connection seat may be a single seat body, or may be a combined structure formed by thetube clamp 36 and a support frame or a support plate, at this time, one end of the support frame is fixedly disposed on the fixingarm 31, and the other end of the support frame is fixedly connected to thetube clamp 36.

Of course, theduct 33 shown in fig. 5 in the present embodiment is not limited to the above structure, for example: theconduit 33 may also comprise only a first pipe element fixedly connected to thetelescopic arm 32 and a second pipe element fixedly connected to the fixedarm 31; the first pipe is embedded in the second pipe and is in liquid-tight connection with the second pipe, or the first pipe is sleeved outside the second pipe and is in liquid-tight connection with the second pipe; the axial direction of the first pipe fitting is parallel to the length direction of thetelescopic arm 32 and the axial direction of the second pipe fitting, and the end part of the first pipe fitting in the axial direction can extend out or retract along the axial direction of the second pipe fitting. The connection relationship between the first pipe member and the second pipe member in theconduit 33 in this structure is similar to that between the fixingarm 31 and thetelescopic arm 32. In essence, the structure of thetube 33 may also be a telescopic antenna-like structure.

The embodiment of the utility model provides a concrete pump truck, including power unit and the aforesaid the utility model discloses the flexible cloth rod mechanism as shown in figure 3, figure 4 and figure 5 that any embodiment provided, wherein:

the power mechanism provides power for the extension or retraction movement of thetelescopic arm 32 in the telescopic cloth rod mechanism along the length direction of the fixedarm 31.

Concrete pump truck adopts the utility model discloses the flexible cloth pole mechanism that any embodiment provided not only can reduce concrete pump truck's volume, weight, but also can strengthen the flexibility of concrete pump truck cloth.

Of course, the telescopic distributing rod mechanism provided by any embodiment of the present invention can also be applied to other devices besides a concrete pump truck.

In this embodiment, the power mechanism may be an oil cylinder, or may be a motor or other motors. In the embodiment, the power mechanism is preferably a telescopic oil cylinder. The oil cylinder has the advantages of light structure and low cost. Of course, other cylinders than the telescopic cylinder or other power mechanisms with telescopic function may be used as the power mechanism.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides a concertina cloth lever mechanism which characterized in that, includes flexible arm, fixed arm and pipeline, wherein:

2. The telescopic cloth beam mechanism of claim 1, wherein the fixed arm is a hollow structure formed by bending a plate, and the telescopic arm is embedded in the fixed arm.

3. The telescopic cloth rod mechanism of claim 1 or 2, wherein the conduit comprises a first pipe, a second pipe, a third pipe, a fourth pipe, a fifth pipe and a sixth pipe in communication in sequence, wherein:

4. The telescoping cloth beam mechanism of claim 3 further comprising a telescoping sub beam fixedly connected to the telescoping beam, wherein:

5. The telescopic cloth beam mechanism of claim 4, wherein a fixed bracket is further provided between one end of the telescopic sub-beam and an end of the telescopic beam far away from the fixed arm, and the telescopic sub-beam and the telescopic beam are fixedly connected together by the fixed bracket; and/or the presence of a gas in the gas,

the telescopic auxiliary arm is rod-shaped, wherein:

the guide structure is a roller fixedly arranged on the telescopic auxiliary arm, the roller is abutted against the outer surface of one side of the fixed arm, and the roller can roll on the outer surface of the fixed arm along the length direction of the fixed arm; or,

6. A telescopic cloth beam mechanism according to claim 4, wherein the first tube is fixed to the telescopic sub-arm by at least one clamp.

7. The telescopic cloth rod mechanism of claim 3, wherein the first tube is fixedly connected to the second tube, or the first tube and the second tube are an integrated structure;

8. The telescoping cloth rod mechanism of claim 7, wherein a connection column is further provided between the pipe clamp and the telescoping sub-boom between the second and third pipe members, the connection column being fixedly connected with the pipe clamp and the telescoping sub-boom, respectively;

9. The telescoping cloth rod mechanism of claim 1, wherein the conduit comprises a first tube and a second tube, wherein:

10. A concrete pump truck comprising a power mechanism and the telescopic cloth beam mechanism of any one of claims 1 to 9, wherein: