CN217001690U - Push beam structure and stock platform truck - Google Patents

Abstract

The utility model provides a push beam structure and an anchor rod trolley, and relates to the field of engineering machinery. The propelling beam structure comprises a propelling beam body and a hydraulic rock drill; a pipe coiler is arranged on the propelling beam body in a sliding mode, a pipeline mounting support is fixedly arranged on the propelling beam body, a first displacement encoder is fixedly arranged on the pipeline mounting support, and a pull rope of the first displacement encoder is connected with the pipe coiler; the hydraulic rock drill is arranged on the pushing beam body, a plurality of hydraulic pipelines are connected to the hydraulic rock drill and wound on the pipe coiling device, the hydraulic pipelines are fixedly connected with the pipeline mounting bracket, and at least one hydraulic pipeline is located above the pull rope of the first displacement encoder. In the process that coil pipe ware and hydraulic rock drill removed, the stay cord receives the protection of top hydraulic line all the time, and during the stone that is difficult for falling in the tunnel pounded, first displacement encoder can steady operation.

Description

Propulsion beam structure and stock platform truck

Technical Field

The utility model relates to the field of engineering machinery, in particular to a push beam structure and an anchor rod trolley.

Background

The hydraulic rock drill is a core component of the anchor rod trolley and is connected with the arm support through a propelling beam. When the anchor rod trolley works, the hydraulic rock drill adjusts the position by means of the arm support and finishes the feeding action by means of the propelling beam, so that the drilling operation is realized. In order to accurately control the drilling depth of a hydraulic rock drill, a displacement encoder is often provided on the feed beam for detecting the displacement of the hydraulic rock drill relative to the feed beam.

In current stock platform truck, comparatively common displacement encoder is stay cord displacement encoder. Most of the stay rope displacement encoders are arranged on the side face of the front end of the push beam, and stay ropes of the stay rope displacement encoders are connected with moving parts such as a hydraulic rock drill and the like, so that the stay rope displacement encoders have the advantages of simple and reliable structure.

However, in the working process of the anchor rod trolley, stones in the tunnel fall, and the pull rope is easy to break, so that the pull rope is damaged, and the normal operation of the anchor rod trolley is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of the prior art, it is an object of the present invention to provide a feed beam structure.

The utility model provides the following technical scheme:

a propulsion beam structure comprises a propulsion beam body and a hydraulic rock drill;

a pipe coiling device is slidably arranged on the propelling beam body, a pipeline mounting support is fixedly arranged on the propelling beam body, a first displacement encoder is fixedly arranged on the pipeline mounting support, and a pull rope of the first displacement encoder is connected with the pipe coiling device;

the hydraulic rock drill set up in on the propulsion beam body, hydraulic rock drill is last to have connect a plurality of hydraulic line, hydraulic line is around locating on the coiler, hydraulic line with pipeline installing support fixed connection, at least one hydraulic line is located the stay cord top of first displacement encoder.

As a further optional scheme for the propulsion beam structure, a coiler mounting plate is arranged between the coiler and the propulsion beam body, the coiler mounting plate is fixedly connected with the bottom end of the coiler, the coiler mounting plate is slidably arranged on the propulsion beam body, and a pull rope of the first displacement encoder is connected with the coiler mounting plate.

As a further optional scheme for the propulsion beam structure, a pull rope mounting plate is fixedly arranged on the coiler mounting plate, and a pull rope of the first displacement encoder is fixedly connected with the pull rope mounting plate.

As a further optional scheme for the propulsion beam structure, a first encoder mounting plate is fixedly arranged on the pipeline mounting bracket, and the first displacement encoder is fixedly arranged on the first encoder mounting plate.

As a further optional scheme for the propulsion beam structure, an encoder shield is fixedly arranged on the pipeline mounting bracket, and the first displacement encoder is located in the encoder shield.

Another object of the present invention is to provide a roof bolt jumbo.

The utility model provides the following technical scheme:

an anchor rod trolley comprises the propelling beam structure.

As a further optional scheme of the anchor bar trolley, the anchor bar trolley further comprises a trolley body and a telescopic drill boom, and the propelling beam body is connected with the trolley body through the telescopic drill boom.

As a further optional scheme for the anchor rod trolley, the telescopic drill boom comprises a large boom and a telescopic boom, and the large boom is in sliding insertion fit with the telescopic boom;

and a second displacement encoder is arranged on the bottom surface of the large arm, and a pull rope of the second displacement encoder is connected with the telescopic arm.

As a further optional scheme for the anchor rod trolley, a second encoder mounting plate is arranged on the bottom surface of the large arm, the second encoder mounting plate is U-shaped, an opening of the second encoder mounting plate faces downwards, and the second displacement encoder is arranged on the second encoder mounting plate;

and the telescopic arm is provided with a connecting plate, and a pull rope of the second displacement encoder is fixedly connected with the connecting plate.

As a further optional scheme for the anchor rod trolley, an arm support is arranged on the trolley body, the telescopic drill boom is hinged with the arm support through a large boom swing seat, and a drill boom pitching oil cylinder is further arranged between the telescopic drill boom and the arm support;

the drilling boom pitching oil cylinders are arranged in pairs, one end of each drilling boom pitching oil cylinder is hinged with the telescopic drilling boom through an oil cylinder hinged seat, the other end of each drilling boom pitching oil cylinder is hinged with the boom support through a large boom swinging hinged seat, and the two large boom swinging hinged seats are respectively positioned on two sides of the large boom swinging seat.

The embodiment of the utility model has the following beneficial effects:

a hydraulic line for driving hydraulic rock drill is fixed mounting on the pipeline installing support, walks around the coiled tubing ware and links to each other with hydraulic rock drill, has hydraulic line between pipeline installing support and the coiled tubing ware promptly all the time. On this basis, set firmly first displacement encoder on the pipeline installing support, make first displacement encoder's stay cord link to each other with the coil pipe ware to make at least one hydraulic pressure pipeline be located this stay cord top, then at the in-process that coil pipe ware and hydraulic rock drill removed, the stay cord receives top hydraulic pressure pipeline's protection all the time, and during the stone that is difficult for falling in by the tunnel pounded, first displacement encoder can steady operation.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram illustrating a feed beam structure provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural view illustrating a pipeline mounting bracket in a feed beam structure according to embodiment 1 of the present invention;

fig. 3 is a schematic view showing an overall structure of a rock-bolt jumbo provided in embodiment 2 of the present invention;

fig. 4 is a schematic diagram illustrating a connection relationship between an arm support and a large arm in an anchor bar trolley provided by embodiment 2 of the utility model;

fig. 5 is a schematic view showing a connection relationship between an arm support and a large arm in an anchor bar trolley provided in embodiment 2 of the present invention;

fig. 6 is a schematic structural view illustrating a telescopic drill boom in a jumbolter truck according to embodiment 2 of the present invention;

fig. 7 is a schematic view showing a connection relationship between a telescopic drill boom and a feed beam body in a jumbolter provided in embodiment 2 of the present invention.

Description of the main element symbols:

100-a pusher beam body; 110-a reel; 120-a pipeline mounting bracket; 121-mounting holes; 122-a first encoder mounting plate; 123-an encoder shield; 130-coiled tubing device mounting plate; 131-a pull rope mounting plate; 200-hydraulic rock drill; 300-a first displacement encoder; 400-a vehicle body; 410-a front frame; 420-rear frame; 430-cab; 440-boom support; 441-big arm swing seat; 442-boom pitch rams; 443-big arm swing hinge seat; 500-telescoping drill boom; 510-big arm; 511-oil cylinder hinged seat; 512-a second encoder mounting plate; 520-a telescopic arm; 521-a connecting plate; 522-propel beam pitch ram; 600-a second displacement encoder; 700-pitching pendulum seat; 710-horizontal swing seat; 720-rotating oil cylinder; 800-a feed beam pitch mount; 810-propel beam pitch extension; 900-pushing the beam carrier; 910-push beam telescoping cylinders.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1, the present embodiment provides a feed beam structure applied to a rock bolt jumbo, and the feed beam structure includes a feed beam body 100 and a hydraulic rock drill 200.

Specifically, the hydraulic rock drill 200 is slidably disposed on the upper surface of the feed beam body 100 along the length direction of the feed beam body 100, and the feed beam body 100 is provided with a drilling cylinder. The body of the drilling cylinder is bolted to the feed beam body 100, and the piston rod of the drilling cylinder is bolted to the hydraulic rock drill 200.

When the drilling oil cylinder is filled with hydraulic oil, the hydraulic rock drill 200 is driven by the drilling oil cylinder to move from the tail end of the feed beam body 100 to the head end of the feed beam body 100, and the feeding action is completed.

In addition, nine hydraulic pipelines are connected to the hydraulic rock drill 200, and the hydraulic pipelines are used for driving the hydraulic rock drill 200 to operate.

Specifically, the feed beam body 100 is provided with a pipe coiling device 110 and a pipe mounting bracket 120 for supporting and restraining the hydraulic pipe to prevent the hydraulic pipe from being scattered, knotted or wound around other structures.

The upper surface of the feed beam body 100 is provided with a coiler mounting plate 130 in a sliding manner, the sliding direction of the coiler mounting plate 130 is the same as that of the hydraulic rock drill 200, and the coiler mounting plate 130 is located between the tail end of the feed beam body 100 and the hydraulic rock drill 200. The bottom end of the coiler 110 is bolted to the upper surface of the coiler mounting plate 130 and is in sliding connection with the pusher beam body 100.

Referring to fig. 1 and 2, the pipeline mounting bracket 120 is fixed on a side surface of the feed beam body 100 by bolts, and is located in the middle of the feed beam body 100, and the pipeline mounting bracket 120 is provided with a plurality of mounting holes 121.

Correspondingly, the hydraulic pipeline is wound on the pipe coiling device 110, one end of the hydraulic pipeline is connected with the hydraulic rock drill 200, and the other end of the hydraulic pipeline penetrates through the corresponding mounting hole 121 on the pipeline mounting bracket 120 and is bolted and fixed with the pipeline mounting bracket 120.

When the hydraulic rock drill 200 slides on the feed beam body 100, the pipe coiling device 110 slides along with the hydraulic rock drill, the sliding speed and the sliding distance of the pipe coiling device 110 are half of those of the hydraulic rock drill 200, and a hydraulic pipeline wound on the pipe coiling device 110 is always kept in a tensioning state.

Specifically, the first encoder mounting plate 122 is welded and fixed to the lower portion of the pipe mounting bracket 120, and the first displacement encoder 300 is bolted and fixed to the first encoder mounting plate 122. In particular, the first displacement encoder 300 is a pull cord displacement encoder, the pull cord of which is connected to the coiler 110. In addition, the first displacement encoder 300 is vertically installed, the stretching ropes are more smoothly wound and released, and the anti-interference performance is stronger.

In this embodiment, the rope-pulling mounting plate 131 is bolted to the coiler mounting plate 130, and the rope of the first displacement encoder 300 is bolted to the rope-pulling mounting plate 131 and further connected to the coiler 110 through the coiler mounting plate 130.

In one aspect, the first displacement encoder 300 is fixed with the first encoder mounting plate 122 at a lower portion of the pipe mounting bracket 120, below a portion of the hydraulic pipe. On the other hand, the rope end of the first displacement encoder 300 is fixed to the coiler mounting plate 130 along with the rope mounting plate 131, and is positioned below the respective hydraulic lines. Thus, the hydraulic lines between the line mounting bracket 120 and the coiled tubing drive 110 are always shielded from the pull cords of the first displacement encoder 300.

Further, an encoder shroud 123 is bolted and fixed to the pipe mounting bracket 120. The encoder guard shield 123 covers first displacement encoder 300, and the cooperation pipeline installing support 120 forms relative airtight space, prevents that first displacement encoder 300 from being pounded by the stone that falls in the tunnel, protects first displacement encoder 300.

In summary, in the above-described feed beam structure, the hydraulic line is fixedly mounted on the line mounting bracket 120, and is connected to the hydraulic rock drill 200 after bypassing the pipe coiler 110, that is, the hydraulic line is always present between the line mounting bracket 120 and the pipe coiler 110. On this basis, set firmly first displacement encoder 300 on pipeline installing support 120, make the stay cord of first displacement encoder 300 link to each other with coil pipe ware 110 to make at least one hydraulic pressure pipeline be located this stay cord top, then at the in-process that coil pipe ware 110 and hydraulic rock drill 200 removed, the stay cord can not expose outside the hydraulic pressure pipeline, receives top hydraulic pressure pipeline's protection all the time, and the stone that is difficult for falling in by the tunnel smashes badly. In addition, the first displacement encoder 300 is protected by the encoder shield 123, and is not easily broken by falling rocks in the tunnel, so that the operation can be stabilized.

Example 2

Referring to fig. 3, the present embodiment provides an anchor bar trolley, and more particularly, to a single-arm anchor bar trolley. The anchor trolley includes a vehicle body 400, a telescopic boom 500 and the above-described feed beam structure, and the feed beam structure is connected to the vehicle body 400 through the telescopic boom 500.

Specifically, the vehicle body 400 is composed of a front frame 410 and a rear frame 420 in the traveling direction of the vehicle body 400. The front end of the vehicle body 400 is provided with a front supporting leg, and the rear end of the vehicle body 400 is provided with a rear supporting leg. The bottom of the car body 400 is provided with a chassis system, and the chassis system is composed of a traveling mechanism and a driving mechanism and used for driving the whole anchor rod trolley to move. The middle part of the front end of the vehicle body 400 is fixedly connected with a cab 430, and an electric appliance and hydraulic intelligent control system is arranged in the cab 430. The left side of the rear end of the vehicle body 400 is provided with a cable drum and a water pipe drum. In addition, a boom support 440 is welded or bolted to the front frame 410, and the telescopic drill boom 500 is connected to the front frame 410 through the boom support 440.

Specifically, the telescopic boom 500 is composed of a large arm 510 and a telescopic arm 520, and the large arm 510 is in sliding insertion fit with the telescopic arm 520. The large arm 510 is connected to the arm support 440, and the telescopic arm 520 is connected to the feed beam structure.

Referring to fig. 4 and 5, the boom support 440 is rotatably provided with a large arm swing seat 441, and the large arm swing seat 441 is vertical to a rotation axis of the boom support 440. The large arm 510 is rotatably connected with the large arm swing seat 441 and further hinged with the arm support 440, and the large arm 510 is in a horizontal direction relative to the rotation axis of the large arm swing seat 441. Thus, the boom 510 can swing left and right and also pitch up and down on the boom support 440.

Two boom pitch rams 442 are also provided between the boom 510 and the boom support 440 in order to drive the boom 510 in yaw and pitch. Correspondingly, two cylinder hinge seats 511 are arranged on the bottom surface of the large arm 510, and two large arm swing hinge seats 443 are rotatably arranged on the arm support 440.

The cylinder hinge base 511 is welded and fixed with the big arm 510, and the body of the boom pitch cylinder 442 is hinged with the cylinder hinge base 511. The boom swing hinge base 443 is in a vertical direction with respect to the rotation axis of the boom support 440, and two boom swing hinge bases 443 are respectively located below both sides of the boom swing base 441, and the piston rod of the drill boom pitch cylinder 442 is hinged with the boom swing hinge base 443.

As the two boom pitch rams 442 telescope simultaneously, the boom 510 is driven by the boom pitch rams 442 to pitch up and down. When one of the boom pitch rams 442 extends and the other boom pitch ram 442 contracts, the boom 510 is swung side-to-side by the boom pitch rams 442.

Referring to fig. 6, in order to precisely control the telescopic state of the telescopic boom 500, a second displacement encoder 600 is provided on the bottom surface of the boom 510 to detect the relative displacement between the boom 510 and the telescopic boom 520. On the one hand, the bottom surface of big arm 510 is welded or bolted and is fixed with second encoder mounting panel 512, and second encoder mounting panel 512 is located the articulated seat 511 of hydro-cylinder and towards one side of telescopic boom 520, and second encoder mounting panel 512 is the U type, and the opening is down, and second displacement encoder 600 is then vertical (or horizontal) to be installed on second encoder mounting panel 512. On the other hand, the link plate 521 is fixed to the telescopic arm 520, and the pull cord of the second displacement encoder 600 is bolted to the link plate 521.

When the telescopic boom 500 performs the telescopic motion, the pull rope of the second displacement encoder 600 is displaced, thereby detecting the telescopic motion of the telescopic boom 500. In this process, the large arm 510 shields the pull rope of the second displacement encoder 600, so that the second displacement encoder 600 is not easily damaged by falling rocks in the tunnel.

Referring to fig. 7, a pitching pendulum base 700 is rotatably disposed at an end of the telescopic arm 520 away from the arm support base 440, and a push beam pitching cylinder 522 is hinged thereto, and a piston rod of the push beam pitching cylinder 522 is hinged to the pitching pendulum base 700. As the spar pitch ram 522 extends and contracts, the pitch pendulum 700 pitches relative to the telescoping arm 520.

The pitching oscillating base 700 is rotatably provided with a horizontal oscillating base 710, a horizontal oscillating telescopic piece is arranged between the pitching oscillating base 700 and the horizontal oscillating base 710, and the horizontal oscillating of the horizontal oscillating base 710 relative to the pitching oscillating base 700 is realized through the horizontal oscillating telescopic piece.

The horizontal swing seat 710 is fixedly provided with a rotary oil cylinder 720, the output end of the rotary oil cylinder 720 is fixedly connected with a propelling beam pitching installation seat 800, and the propelling beam pitching installation seat 800 rotates around the horizontal swing seat 710 along the circumferential direction of the tunnel by 360 degrees without dead angles under the driving of the rotary oil cylinder 720.

One end of the feed beam pitch mount 800 is connected to the rotary cylinder 720, and the other end is hinged to a feed beam bracket 900, and a feed beam pitch extension 810 is provided between the feed beam pitch mount 800 and the feed beam bracket 900. A feed beam pitch extension 810 is hinged at one end to the feed beam pitch mount 800 and at the other end to the feed beam carrier 900 and, when extended, drives the feed beam carrier 900 to rotate relative to the feed beam pitch mount 800.

The propelling beam body 100 in the propelling beam structure is slidably arranged on the propelling beam bracket 900, and a propelling beam telescopic oil cylinder 910 is further arranged on the propelling beam bracket 900. The cylinder body of the push beam telescopic cylinder 910 is bolted and fixed with the push beam bracket 900, and the piston rod of the push beam telescopic cylinder 910 is bolted and fixed with the push beam body 100. The feed beam body 100 is driven by the feed beam extension cylinder 910 to extend and retract with respect to the feed beam bracket 900.

Thus, the telescopic boom 500 and the feed beam structure can achieve multi-degree-of-freedom, all-directional, dead-angle-free motion.

In particular, angular displacement encoders are disposed at the hinged positions of the boom 510 and the boom support 440 and the hinged positions of the feed beam bracket 900 and the feed beam pitch mount 800, respectively, so as to detect the motion angles of the boom 510 and the feed beam body 100. A pull-cord displacement encoder is provided at an end of the feed beam holder 900 facing the vehicle body 400 for detecting displacement of the feed beam body 100 relative to the feed beam holder 900.

In a word, the anchor rod trolley is provided with a plurality of kinds of telescopic pieces on the telescopic drill boom 500, and is matched with a plurality of mounting seats and swinging seats, so that the degree of freedom of a propulsion beam system is extremely high, no dead angle exists in a working range, and the anchor rod trolley is suitable for various working conditions and meets different construction requirements. Secondly, the telescopic boom 500 greatly increases the operation range, the operation is more flexible, the size of the vehicle body is reduced as much as possible, and the operation range is enlarged. Moreover, the single-arm structure enables the size of a required vehicle body to be reduced, the weight of the whole vehicle is effectively reduced, the movement is flexible, the transition is convenient, the structure is simple, and the stability is good. Finally, the first displacement encoder 300 and the second displacement encoder 600 can be effectively protected and are not easily damaged by stones.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (10)

1. A propulsion beam structure is characterized by comprising a propulsion beam body and a hydraulic rock drill;

a pipe coiling device is slidably arranged on the propelling beam body, a pipeline mounting support is fixedly arranged on the propelling beam body, a first displacement encoder is fixedly arranged on the pipeline mounting support, and a pull rope of the first displacement encoder is connected with the pipe coiling device;

the hydraulic rock drill set up in on the propulsion beam body, hydraulic rock drill is last to have connect a plurality of hydraulic line, hydraulic line is around locating on the coiler, hydraulic line with pipeline installing support fixed connection, at least one hydraulic line is located the stay cord top of first displacement encoder.

2. A feed beam structure according to claim 1, characterized in that a coiler mounting plate is arranged between the coiler and the feed beam body, the coiler mounting plate is fixedly connected with the bottom end of the coiler, the coiler mounting plate is slidably arranged on the feed beam body, and the pull rope of the first displacement encoder is connected with the coiler mounting plate.

3. A push beam construction according to claim 2, wherein a pull rope mounting plate is fixedly arranged on the hose reel mounting plate, and the pull rope of the first displacement encoder is fixedly connected with the pull rope mounting plate.

4. The feed beam structure of claim 1, wherein the pipeline mounting bracket has a first encoder mounting plate secured thereto, and the first displacement encoder is secured to the first encoder mounting plate.

5. The feed beam structure of claim 1, wherein an encoder shroud is secured to the pipe mounting bracket, and the first displacement encoder is located within the encoder shroud.

6. A roof-bolter trolley, characterized in that it comprises a feed beam structure according to any one of claims 1-5.

7. A roof bolter truck as claimed in claim 6, further comprising a truck body and a telescoping boom, the push beam body being connected to the truck body by the telescoping boom.

8. The jumbo of claim 7, wherein the telescopic drill boom comprises a large boom and a telescopic boom, the large boom being in sliding, socket-fit engagement with the telescopic boom;

and a second displacement encoder is arranged on the bottom surface of the large arm, and a pull rope of the second displacement encoder is connected with the telescopic arm.

9. The jumbolter as claimed in claim 8, wherein the bottom surface of the boom is provided with a second encoder mounting plate, the second encoder mounting plate is U-shaped and has a downward opening, and the second displacement encoder is provided on the second encoder mounting plate;

and the telescopic arm is provided with a connecting plate, and a pull rope of the second displacement encoder is fixedly connected with the connecting plate.

10. The anchor rod trolley as claimed in claim 7, wherein an arm support seat is provided on the trolley body, the telescopic drill arm is hinged to the arm support seat through a large arm swing seat, and a drill arm pitching cylinder is further provided between the telescopic drill arm and the arm support seat;

the drilling boom pitching oil cylinders are arranged in pairs, one end of each drilling boom pitching oil cylinder is hinged with the telescopic drilling boom through an oil cylinder hinged seat, the other end of each drilling boom pitching oil cylinder is hinged with the boom support through a large boom swinging hinged seat, and the two large boom swinging hinged seats are respectively positioned on two sides of the large boom swinging seat.

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