CN114370238A

CN114370238A - Anchoring drilling machine

Info

Publication number: CN114370238A
Application number: CN202210072331.0A
Authority: CN
Inventors: 杨孟晓; 刘畅; 王浩
Original assignee: Beijing Sany Intelligent Technology Co Ltd
Current assignee: Beijing Sany Intelligent Technology Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-04-19

Abstract

The invention provides an anchor drilling machine, which comprises a main mast, an extension mast and an anchor mechanism, wherein the extension mast is configured to be selectively connected with the main mast to form an extension mast mechanism, and the anchor mechanism is configured to be connected with the main mast or the extension mast mechanism. The anchoring drilling machine has a standard anchoring mode and a lengthened anchoring mode, can meet the drilling requirements of different depths, improves the equipment utilization rate, reduces the construction cost, and overcomes the defect that the adaptability of a single anchoring drilling machine is poor due to the fact that the drilling depth is relatively fixed.

Description

Anchoring drilling machine

Technical Field

The invention relates to the technical field of engineering machinery, in particular to an anchoring drilling machine.

Background

In the construction of foundation pit support and slope engineering, an anchor rod is often buried in a rock-soil body to anchor the rock-soil body so as to mobilize and improve the self-strength and self-stability of the rock-soil body and prevent geological disasters such as collapse, rock burst or landslide. At present, the mainstream equipment for anchoring construction is an anchoring drilling machine, and a rock and soil body can be drilled through the anchoring drilling machine so as to put an anchor rod into the rock and soil body.

However, since the construction environments of different projects are changed, the drilling requirements are changed accordingly, and the drilling depth of the anchor drilling machine in the prior art is relatively fixed, so that a single anchor drilling machine cannot meet the drilling requirements of multiple depths. In such a case, people often need to replace other drilling machines to drill holes, which not only reduces the utilization rate of single equipment, but also greatly increases the cost.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the anchoring drilling machine in the prior art cannot simultaneously meet various drilling requirements and has low equipment utilization rate, thereby providing the anchoring drilling machine.

In order to solve the above problems, the present invention provides an anchor drilling machine including a main mast, an extension mast, and an anchor mechanism. Wherein the extension mast is configured to be selectively connectable with the main mast to form an extension mast mechanism; the anchoring mechanism is configured to be coupled to the main mast or the extension mast mechanism.

Optionally, a first connecting structure is arranged at the upper end of the main mast, and a second connecting structure is arranged at the lower end of the main mast; the extension mast is configured to be selectively connectable with the main mast via the first connection structure or the second connection structure to form the extension mast mechanism.

Optionally, when the angle between the main mast and the ground is greater than 45 ° and not greater than 90 °, the extension mast is configured to be selectively connectable with the main mast via the first connecting structure.

Optionally, when the angle between the main mast and the ground is not greater than 45 ° and not less than 0 °, the extension mast is configured to be selectively connected with the main mast through the second connecting structure.

Optionally, the extension mast is configured to be selectively foldably connected to the main mast by a first connection structure or a second connection structure.

Optionally, the anchoring mechanism comprises an anchoring drill and an anchoring pulley frame, the anchoring pulley frame is detachably connected with the upper end of the main mast or the upper end of the lengthened mast mechanism, a first pulley is arranged on the anchoring pulley frame, and the first pulley is located on the extension line of the main mast; the anchoring drilling machine further comprises a main winch and a first connecting rope, one end of the first connecting rope is connected to the main winch, and the other end of the first connecting rope bypasses a first pulley to be connected with the anchoring drilling tool so as to lift the anchoring drilling tool.

Optionally, the anchoring mechanism further comprises a grouting assembly, and the grouting assembly is detachably connected with the anchoring drilling tool.

Optionally, the anchor drilling machine further comprises a secondary winch and a second connecting rope, the secondary winch being connected with the anchor drilling tool through the second connecting rope to provide the pressurizing force.

Optionally, the anchoring drilling machine further comprises a crawler type travelling mechanism and a vehicle body, the vehicle body is rotatably connected above the crawler type travelling mechanism, and the main mast is connected with the vehicle body.

Optionally, the anchor drilling rig further comprises a mast cylinder and a luffing mechanism. The mast oil cylinder comprises a cylinder body and a telescopic rod, and the telescopic rod is connected with the main mast; one end of the amplitude variation mechanism is connected with the vehicle body, and the other end of the amplitude variation mechanism is respectively connected with the main mast and the cylinder body.

The invention has the following advantages:

1. the anchoring mechanism is directly connected with the main mast, so that the drilling machine can enter a standard anchoring mode; the lengthened mast mechanism formed by connecting the anchoring mechanism with the main mast and the lengthened mast is connected, so that the drilling machine can enter a lengthened anchoring mode, the drilling depth is increased, more drilling requirements are met, the equipment utilization rate is improved, and the construction cost is reduced.

2. The main mast can be connected with the lengthened mast through a first connecting structure, so that the top is lengthened; the main mast can also be connected with the lengthening mast through a second connecting structure, so that the bottom is lengthened, and the lengthening mode is flexible.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic view of the construction of a drilling rig in a standard anchorage mode provided by the present invention;

FIG. 2 shows a schematic structural view of the drilling rig in a top extension anchor mode provided by the present invention;

FIG. 3 shows an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic structural view of the drilling rig in the bottom extension anchor mode provided by the present invention;

FIG. 5 shows an enlarged schematic view of the structure at B in FIG. 4;

FIG. 6 is a schematic diagram showing the construction of an extension mast in the drilling rig provided by the present invention;

fig. 7 shows a schematic structural diagram of an anchoring pulley yoke in the drilling machine provided by the invention;

FIG. 8 shows a schematic structural view of an anchoring mast in a drilling rig provided by the present invention;

FIG. 9 is a schematic view of another embodiment of the present invention showing the connection between the main mast and the extension mast;

fig. 10 shows a schematic view of the construction of the drilling rig in a transport state according to the invention.

Description of reference numerals:

10. a main mast; 11. a first connecting structure; 12. a second connecting structure; 13. a pin shaft; 20. lengthening the mast; 21. a first companion flange; 22. a second companion flange; 30. an anchoring mechanism; 31. anchoring the drilling tool; 311. anchoring the power head; 312. a auger stem; 313. a guide protection cylinder; 32. anchoring the pulley yoke; 321. a first pulley; 33. a grouting component; 331. grouting a hose; 332. grouting the elbow; 34. anchoring the mast; 341. a third companion flange; 342. a fourth companion flange; 343. a second pulley; 40. main hoisting; 50. a first connecting rope; 60. auxiliary hoisting; 70. a second connecting rope; 80. a crawler-type traveling mechanism; 90. a vehicle body; 91. a boarding platform; 92. a cab; 100. a mast cylinder; 101. a cylinder body; 102. a telescopic rod; 110. a luffing mechanism.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-6, the present embodiment provides an anchor drilling machine including a main mast 10, an extension mast 20, and an anchoring mechanism 30. Wherein the extension mast 20 is selectively connectable with the main mast 10 to form an extension mast mechanism. The anchoring mechanism 30 is optionally coupled to the main mast 10, and optionally to the extension mast mechanism.

According to the arrangement, referring to fig. 1, the anchoring mechanism 30 is directly connected with the main mast 10, so that the anchoring drilling machine can enter a standard anchoring mode, namely, the anchoring drilling machine is formed; referring to fig. 2 or fig. 4, the anchoring mechanism 30 is connected to the mast lengthening mechanism, so that the anchoring drilling machine enters a lengthening anchoring mode, the drilling depth is increased, the drilling requirements of more depths are met, the equipment utilization rate is improved, and the cost is reduced.

In the aspect of specific parameters, the anchor drilling machine provided by the embodiment has the drilling depth of 0-12m in a standard anchor mode; when the inclination angle of the main mast 10 relative to the ground is 15-45 degrees, the maximum drilling diameter can reach 120-150 mm; the maximum drill diameter can be up to 200mm when the main mast 10 is perpendicular to the ground. The length of the extension mast 20 is preferably 3m, and the maximum drilling depth of the anchor drilling machine in the extension anchoring mode can be up to 15m by connecting the main mast 10 to the extension mast 20.

In this embodiment, as shown in fig. 2, a first connecting structure 11 is disposed at the upper end of the main mast 10, and the extension mast 20 can be connected to the main mast 10 through the first connecting structure 11 to form an extension mast mechanism, so as to achieve top extension. As shown in fig. 4, the second connecting structure 12 is disposed at the lower end of the main mast 10, and the extension masts 20 can also be connected with the main mast 10 through the second connecting structure 12 to form an extension mast mechanism, so that the bottom extension is realized, and the overall extension manner is flexible.

Preferably, when the angle between the main mast 10 and the ground is greater than 45 ° and not greater than 90 °, the long mast 20 can be selectively connected to the main mast 10 by the first connecting structure 11 to achieve top lengthening.

Referring to fig. 2, when the angle between the main mast and the ground is greater than 45 ° and not greater than 90 °, since the distance between the main mast 10 and the ground is small, if the extension mast 20 is added to the lower portion of the main mast 10, the bottom of the extension mast 20 will touch the ground, and the extension mast mechanism as a whole cannot be erected, so it is suitable to select to install the extension mast 20 to the top of the main mast 10, i.e., to perform top extension.

Preferably, when the angle between the main mast 10 and the ground is not more than 45 ° and not less than 0 °, the extension mast 20 can be selectively connected to the main mast 10 via the second connecting structure 12 to achieve the bottom extension.

Referring to fig. 4, when the angle between the main mast 10 and the horizontal direction is not more than 45 ° and not less than 0 °, it is appropriate to select the extension mast 20 to be mounted to the bottom of the main mast 10, i.e., to perform bottom extension, because the distance between the main mast 10 and the ground is large. Meanwhile, under the condition, the center of gravity of the anchoring drill can be moved forwards by lengthening the bottom, so that the anchoring drill is prevented from turning backwards.

Of course, in other embodiments, top lengthening or bottom lengthening can be selected according to the actual situation. For example, when the angle between the main mast 10 and the horizontal direction is not more than 45 ° and not less than 0 °, the top portion may be optionally lengthened if the top portion is lengthened to keep the overall weight of the anchor drilling machine balanced.

In this embodiment, the first connecting structure 11 includes a first docking flange, and a first connecting hole is disposed on the first docking flange, so as to realize flange connection at the top of the main mast 10, thereby ensuring convenience and stability of mast connection. The second connecting structure 12 comprises a second docking flange, which is provided with a second connecting hole for flange connection at the bottom of the main mast 10.

As shown in fig. 7, a first mating flange 21 is formed at the upper end of the extension mast 20, and a second mating flange 22 is formed at the lower end of the extension mast 20. The first mating flange 21 can be mated with the first mating flange to mount the extension mast 20 directly to the top of the main mast 10; the second mating flange 22 can be mated with a second mating flange to mount the extension mast 20 directly to the bottom of the main mast 10.

It should be noted that, when the extension mast 20 is actually connected, the position of the extension mast 20 is flexibly set, and the extension mast 20 can be directly connected to the main mast 10 or indirectly connected to the main mast 10.

In one aspect, referring to fig. 2 and 3, an anchor mast 34 is provided in the anchor mechanism 30, and the extension mast 20 is connected to the top of the main mast 10 by the anchor mast 34. More specifically, as shown in fig. 8, a third mating flange 341 is formed at the lower end of the anchoring mast 34, a fourth mating flange 342 is formed at the upper end of the anchoring mast 34, the first mating flange is in butt joint with the third mating flange 341, and the fourth mating flange 342 is in butt joint with the first mating flange 21, so as to achieve top lengthening. On the other hand, referring to fig. 4 and 5, the extension mast 20 is directly connected to the bottom of the main mast 10 to achieve bottom extension.

In this embodiment, the masts such as the main mast 10, the lengthened mast 20 and the anchoring mast 34 are all configured as rectangular tube box type structures, so that the volume is small, the strength is high, the weight is light, and the stability of the whole machine can be ensured. Preferably, the mast side is 350mm-400mm long.

In another embodiment, the masts can be connected by folding instead of being fixed by flange structures, for example, the first connecting structure 11 can be connected with the lengthened mast 20 by folding, and the second connecting structure 12 can be connected with the lengthened mast 20 by folding. Specifically, referring to fig. 9, a pin 13 may be provided at the end of the main mast 10. When the main mast 10 and the lengthened mast 20 are in butt joint, three sides of the two masts are fixedly connected through a flange structure, so that the installation is firm and the masts are not easy to shake; one side of each of the two masts is hinged through a pin shaft 13. After the flange bolts are disassembled, the folding between the two masts can be realized by rotating the pin shaft 13, the storage is carried out, and the installation can be rapidly carried out when the next work is convenient. The structure is mainly suitable for the condition that the whole transportation length of the anchoring drilling machine is limited, and in the condition, the mast with the shorter top or bottom does not need to be detached.

The anchoring mechanism 30 will be further described below.

As for the anchoring mechanism 30, as shown in fig. 1, it includes an anchoring drill 31 and an anchoring pulley block 32, and the anchoring pulley block 32 is detachably connected to the upper end of the main mast 10 or the upper end of the extension mast mechanism to be mounted to the anchoring drill. Referring to fig. 1 and 8, a first pulley 321 is provided on the anchoring pulley frame 32, and the first pulley 321 is located on an extension line of the main mast 10. In this embodiment, the anchoring sheave bracket 32 has a total length of about 2 m.

Preferably, the weight of the anchor sheave frame 32, the extension mast 20, the anchor mast 34, and the main mast 10 are sequentially increased to try to move the center of gravity downward during top extension of the anchor drilling machine, which is beneficial for maintaining the balance of the anchor drilling machine.

The anchoring drill further includes a main hoist 40 and a first connection rope 50, one end of the first connection rope 50 is connected to the main hoist 40, and the other end of the first connection rope 50 is connected to the anchoring drill 31 around the first pulley 321 to lift the anchoring drill 31.

With respect to the anchoring drill 31, reference is made to fig. 1, which includes an anchoring power head 311, an auger stem 312, and a guide casing 313. The anchoring power head 311 is connected to the top of the auger stem 312 through a flange plate to drive the auger stem 312 to move; the guide casing 313 is fitted over the bottom of the auger stem 312 to guide the auger stem 312. The first connection string 50 is connected to the upper portion of the anchoring power head 311 around the first pulley 321 to lift the anchoring drill 31.

At this time, since the first connection rope 50 can be connected to the side of the anchoring power head 311 close to the main mast 10, it is not necessary to reserve an excessive rope winding space for the first connection rope 50, and the arrangement of the first pulley 321 can ensure the normal winding installation of the first connection rope 50, which is compact in structure.

Referring to fig. 1, the anchor drill further includes a secondary winch 60 and a second connection rope 70, and the secondary winch 60 is connected with the anchor drill 31 through the second connection rope 70 to provide pressurizing force. In this embodiment, referring to fig. 9, a second pulley 343 is provided on the anchoring mast 34, and the second connection rope 70 is connected to the lower portion of the anchoring power head 311 around the second pulley 343 to provide a pressurizing force.

In this embodiment, when the top of the anchoring drill is lengthened, the anchoring power head 311 is installed from the bottom, that is, when the main mast 10 is in the mast standing state, the limiting block at the lower part of the main mast 10 is removed, the anchoring power head 311 is threaded onto the slide rail from the lower part of the main mast 10, and the crane hoists the anchoring power head 311, so that the anchoring power head 311 is connected to the first connecting rope 50 and the second connecting rope 70. When the bottom of the anchoring drilling machine is lengthened, the anchoring power head 311 is firstly installed in a mast standing state, then the first connecting rope 50 is connected with a lifting point at the top of the anchoring power head 311, and after the main mast 10 is inverted, the lengthened mast 20 is installed.

Illustratively, the torque of the anchoring power head 311 is 100-180 kN · m; the lifting force of the main winch 40 is 120kN-180 kN; the pressure provided by the auxiliary winch is 10kN-50 kN. In terms of material, the first connecting rope 50 and the second connecting rope 70 are both steel wire ropes.

Optionally, the anchoring mechanism 30 further comprises a grouting assembly 33, and the grouting assembly 33 is detachably connected with the anchoring drill 31 for grouting work.

Referring to fig. 1, the grouting assembly 33 includes a grouting hose 331 and a grouting elbow 332. Auger stem 312 is hollow; one end of the grouting hose 331 is connected to an onboard or towed pump on the ground, and the other end is connected to the hollow portion of the auger stem 312 through a grouting elbow 332, so that grouting work is performed.

Further, a return bend is provided at the connection between the slip casting elbow 332 and the auger shaft 312 to prevent the slip casting elbow 332 from rotating when the auger shaft 312 rotates. The grouting elbow 332 is also connected with the anchoring power head 311 through a limiting rod to prevent the grouting elbow 332 from freely swinging. In the embodiment, the grouting diameter of the grouting hose 331, the grouting elbow 332 and the auger stem 312 is 60mm-80 mm.

It will be appreciated that when the main mast 10 is connected to the extension mast 20, the auger stem 312 and the grout hose 331 need to be extended simultaneously.

When construction is not required, taking the anchor drilling machine in the standard anchoring mode as an example, as shown in fig. 1 and 10, the anchor drilling machine can be brought into a transport state by: laying down the main mast 10 so that it is substantially parallel to the ground; the grouting hose 331 is removed, and then the fixation between the grouting elbow 332 and the limiting rod is disconnected, so that the grouting elbow 332 falls and is fixed on the side surface of the main mast 10.

Finally, other main structures of the anchoring drill will be described.

As shown in fig. 1, the anchor drill further includes a crawler travel mechanism 80 and a vehicle body 90. Wherein, crawler-type running gear 80 is located the bottom of anchoring drilling machine, and anchoring drilling machine walks through crawler-type running gear 80. The vehicle body 90 is rotatably connected above the crawler type traveling mechanism 80, and the main mast 10 is connected to the vehicle body 90. Specifically, when the anchor drill is constructed, the vehicle body 90 may be rotated such that the front-rear direction thereof is parallel to the front-rear direction of the crawler (refer to fig. 1), and the vehicle body 90 may also be rotated such that the front-rear direction thereof is perpendicular to the front-rear direction of the crawler (refer to fig. 4).

In this embodiment, the vehicle body 90 includes an upper vehicle platform 91 and a cab 92, and an engine and a hydraulic system are provided in the upper vehicle platform 91.

As shown in fig. 1, the anchor drilling rig further includes a mast cylinder 100 and a luffing mechanism 110. The mast cylinder 100 includes a cylinder body 101 and an expansion link 102, and the expansion link 102 is connected to the main mast 10. The luffing mechanism 110 is connected at one end to the vehicle body 90 and at the other end to the main mast 10 and the cylinder 101, respectively. The inclination angle of the main mast 10 can be adjusted by matching the luffing mechanism 110 with the mast oil cylinder 100, so that the construction requirement is met. In addition, the main mast 10 can be prevented from colliding with the cab 92 by adjusting the inclination angle of the main mast 10, thereby ensuring the safety of the driver.

In this embodiment, the luffing mechanism 110 is hingedly connected to the vehicle body 90, the luffing mechanism 110 is hingedly connected to the main mast 10, the mast cylinder 100 is hingedly connected to the luffing mechanism 110, and the mast cylinder 100 is hingedly connected to the main mast 10. Further, the luffing mechanism 110 is a parallelogram structure and has two luffing cylinders, and the mast cylinders 100 are correspondingly provided with two luffing cylinders, so as to ensure the stability of luffing. Since the construction of the luffing mechanism 110 and the mast cylinder 100 is prior art, it will not be described in detail herein.

According to the above description, the present patent application has the following advantages:

1. the anchoring drilling machine has a standard anchoring mode and a lengthened anchoring mode, can meet the drilling requirements of various depths, improves the utilization rate of equipment and reduces the construction cost;

2. the anchoring drilling machine can be lengthened at the top and also lengthened at the bottom, the lengthening mode is flexible, and more various construction requirements can be met.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. An anchor drill, comprising:

a main mast (10);

an extension mast (20) configured to be selectively connectable with the main mast (10) to form an extension mast mechanism;

an anchoring mechanism (30) configured to be connected with the main mast (10) or the extension mast mechanism.

2. The anchor drilling machine according to claim 1, characterized in that the upper end of the main mast (10) is provided with a first connecting structure (11) and the lower end of the main mast (10) is provided with a second connecting structure (12);

the extension mast (20) is configured to be selectively connectable with the main mast (10) by the first connection structure (11) or the second connection structure (12) to form the extension mast mechanism.

3. The anchor drill according to claim 2, characterized in that the extension mast (20) is configured to be selectively connectable to the main mast (10) by the first connecting structure (11) when the angle between the main mast (10) and the ground is greater than 45 ° and not greater than 90 °.

4. The anchor drill according to claim 2, characterized in that the extension mast (20) is configured to be selectively connectable to the main mast (10) by the second connecting structure (12) when the angle between the main mast (10) and the ground is not more than 45 ° and not less than 0 °.

5. The anchor drill according to claim 2, characterized in that the extension mast (20) is configured to be selectively connected in a folding manner to the main mast (10) by means of the first connecting structure (11) or the second connecting structure (12).

6. The anchor drilling machine according to claim 1, characterized in that the anchor mechanism (30) comprises an anchor drilling tool (31) and an anchor pulley holder (32), the anchor pulley holder (32) is detachably connected with the upper end of the main mast (10) or the upper end of the lengthening mast mechanism, a first pulley (321) is arranged on the anchor pulley holder (32), and the first pulley (321) is positioned on the extension line of the main mast (10);

the anchoring drilling machine further comprises a main winch (40) and a first connecting rope (50), one end of the first connecting rope (50) is connected to the main winch (40), and the other end of the first connecting rope (50) is connected with the anchoring drilling tool (31) by bypassing the first pulley (321) so as to lift the anchoring drilling tool (31).

7. The anchoring drill according to claim 6, characterized in that the anchoring mechanism (30) further comprises a grouting assembly (33), the grouting assembly (33) being detachably connected with the anchoring drill (31).

8. The anchor drill according to claim 6, characterized in that it further comprises a secondary winch (60) and a second connecting rope (70), the secondary winch (60) being connected to the anchor drill (31) by means of the second connecting rope (70) to provide a compressive force.

9. The anchor drill of any one of claims 1-8, further comprising:

a crawler-type traveling mechanism (80);

and the vehicle body (90) is rotatably connected above the crawler type travelling mechanism (80), and the main mast (10) is connected with the vehicle body (90).

10. The anchor drill of claim 9, further comprising:

the mast oil cylinder (100) comprises a cylinder body (101) and an expansion rod (102), and the expansion rod (102) is connected with the main mast (10);

and one end of the amplitude variation mechanism (110) is connected with the vehicle body (90), and the other end of the amplitude variation mechanism is respectively connected with the main mast (10) and the cylinder body (101).