CN210343356U

CN210343356U - Working platform, platform arm and drill jumbo

Info

Publication number: CN210343356U
Application number: CN201921175467.4U
Authority: CN
Inventors: 王祥军; 龚俊; 高云
Original assignee: Hunan Wuxin Tunnel Intelligent Equipment Co Ltd
Current assignee: Hunan Wuxin Tunnel Intelligent Equipment Co Ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-04-17
Anticipated expiration: 2029-07-24

Abstract

The utility model discloses a work platform, platform arm and drill jumbo belongs to the tunnel construction and equips the field. The working platform comprises a working basket, a ceiling and a turnover mechanism, wherein the ceiling is pivoted on one side of the working basket and can be turned over up and down around a shaft; the turnover mechanism is used for driving the ceiling to turn over up and down. The utility model is characterized in that a turning part is fixedly connected on the pivot of the ceiling, and the turning part is connected through a turning oil cylinder and drives the turning part to move, thereby realizing the turning adjustment of the ceiling; in addition, the ceiling is turned over and folded, and then the height is reduced, so that the loading and transportation are convenient. The utility model also provides a platform arm and drill jumbo including above-mentioned work platform.

Description

Working platform, platform arm and drill jumbo

Technical Field

The utility model relates to a tunnel construction equipment field especially relates to a work platform, platform arm and drill jumbo.

Background

In tunnel construction, a constructor is often required to inspect a cross section of a tunnel and position drilling equipment or install blasting explosive, and the high-altitude manned working platform can enable the constructor to conveniently and quickly work back and forth on the cross section of the whole tunnel, and can be installed on certain multi-arm drill jumbo or a special explosive loading truck. In the tunnel environment, these high-altitude manned work platforms generally have ceilings, which not only can prevent the harm of falling rocks to personnel and equipment, but also can prevent the personnel from touching the ceiling. However, the fixed ceiling affects the sight and the operation space of operators, and brings inconvenience to tunnel construction.

In view of the above, a new technical solution is urgently needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a work platform and contain this work platform's platform arm and drill jumbo because work platform's ceiling can overturn and adjust, consequently can make things convenient for the operating personnel to be under construction.

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

a working platform comprises a working basket, a ceiling and a turnover mechanism, wherein the working basket comprises a bottom plate and a fence surrounding the bottom plate, and two stand columns are arranged on one side of the working basket; the ceiling comprises a top cover and two supporting rods, the tops of the two supporting rods are respectively and fixedly connected to the top cover, and the bottom ends of the two supporting rods are pivoted between the two upright posts through a pivot shaft, so that the ceiling can be turned over up and down around the pivot shaft; the turnover mechanism comprises a turnover piece and a turnover oil cylinder, the turnover piece is fixedly connected with the pivot, the driving end of the turnover oil cylinder is hinged to the edge of the bottom plate, and the telescopic end of the turnover oil cylinder is hinged to the turnover piece.

As a further improvement, the turnover part comprises a cross rod and connecting rods respectively connected with two ends of the cross rod, the bottom end of each connecting rod is fixedly connected to the pivot, and the cross rod is hinged with the telescopic end of the turnover oil cylinder.

A platform arm comprises a large arm, a telescopic arm and the working platform, wherein the telescopic arm can be sleeved in the large arm in a telescopic manner from front to back; the working platform can be hinged at the front end of the telescopic arm in an up-and-down swinging manner; and a leveling oil cylinder for adjusting the vertical swing angle of the working platform is also arranged between the telescopic arm and the working platform.

As a further improvement, the front end of the telescopic arm is provided with a first pivot part and a second pivot part, the mounting side of the working platform is provided with a connecting part which protrudes obliquely downwards, the connecting part is mutually pivoted with the first pivot part, and two ends of the leveling oil cylinder are respectively hinged to the bottom of the working platform and the second pivot part.

As a further improvement, the platform arm further comprises a telescopic oil cylinder, the driving end of the telescopic oil cylinder is hinged to the large arm, and the telescopic end of the telescopic oil cylinder is hinged to the telescopic arm.

A drill jumbo comprises a chassis, a lifting cab, a drill boom system, a platform boom system, a hydraulic oil tank and a cable drum; the chassis comprises a front frame and a rear frame, and the front frame is hinged with the rear frame; the drill boom system and the platform arm are arranged at the front part of the front frame, and the lifting cab is arranged at the rear part of the front frame; the hydraulic oil tank is arranged at the front part of the rear frame, and the cable drum is arranged at the rear part of the rear frame; the platform arm system comprises the platform arm.

As a further improvement, the front frame is provided with a first connecting part protruding backwards, the rear frame is provided with a second connecting part protruding forwards, the first connecting part and the second connecting part are both provided with pin holes, and during assembly, the pin holes of the first connecting part and the second connecting part are aligned up and down and hinged together through a pin shaft. Preceding frame is connected with the back frame in articulated mode, can reduce the turning radius of drill jumbo, and the effect is especially obvious in such construction environment in tunnel, can improve the mobility of drill jumbo.

As a further improvement, a first lug plate is arranged on one side of the front frame, a second lug plate is arranged on the same side of the rear frame, and the first lug plate and the second lug plate are connected through a pull rod. When the drill jumbo is operated, the front frame and the rear frame are kept at the current positions through the limiting effect of the pull rod, so that the stability during operation is kept, and misoperation is prevented.

As a further improvement, the front frame is provided with an arm support seat, a swing seat capable of horizontally swinging is mounted on the arm support seat, and the large arm is hinged on the swing seat in a manner of swinging up and down; the platform arm system further comprises a second leveling oil cylinder and a pitching oil cylinder, wherein two ends of the second leveling oil cylinder are respectively hinged to the bottom of the swing seat and the bottom of the rear end of the large arm, and two ends of the pitching oil cylinder are respectively hinged to the arm support and the bottom wall of the rear end of the large arm.

As a further improvement, the drill jumbo further comprises a positioning system, the positioning system comprises a controller and a plurality of distance measuring instruments, the distance measuring instruments are installed at different positions of the drill jumbo and used for measuring position information of reference points of the drill jumbo and the tunnel from different positions of the drill jumbo, and the controller receives the position information of the distance measuring instruments and calculates specific positions of the drill jumbo in the tunnel according to a set program. After the position of the drill jumbo in the tunnel is determined, the boom of the drill jumbo can be further positioned, and information such as the position size of a drill hole is further determined. According to the scheme, only the distance data of a limited number of measuring points need to be measured, the distance data of a certain surface in the tunnel does not need to be measured, the calculation complexity and the storage space of the controller are greatly reduced, and the method is simple and reliable.

Compared with the prior art, the utility model discloses following beneficial effect is brought:

the working platform of the utility model is fixedly connected with a turnover part on the pivot of the ceiling, and the turnover part is connected with a turnover oil cylinder and drives the turnover part to move, thereby realizing the turnover adjustment of the ceiling; in addition, the ceiling is turned over and folded, and then the height is reduced, so that the loading and transportation are convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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.

Figure 1 is a side view of a rock drilling rig of the present invention;

figure 2 is a top view of the drill jumbo of the present invention;

fig. 3 is a schematic view of the hinge structure of the front frame and the rear frame of the drill jumbo of the present invention;

FIG. 4 is a cross-sectional view taken at P in FIG. 3;

fig. 5 is a side view of a preferred embodiment of the platform arm of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at M;

fig. 7 is a top view of a preferred embodiment of the platform arm of the present invention;

FIG. 8 is a perspective view of a preferred embodiment of the platform arm of the present invention;

FIG. 9 is a perspective view of the work platform shown in FIG. 8;

fig. 10 is a schematic view of the working platform of the present invention in a folded state;

fig. 11 is a schematic view of the installation of the distance measuring device according to one embodiment of the present invention.

Description of the main element symbols:

100-a rock drilling rig; 1-a propulsion beam; 2-arm support; 3-a platform arm system; 5-arm support seat; 6-front telescopic supporting legs; 7-front axle; 8-front frame; 81-a first connection; 82-a first ear plate; 9-lifting type cab; 10-a hydraulic oil tank; 11-rear axle; 12-a rear frame; 121-a second connection; 122-a second ear plate; 13-a body cover; 14-a cable drum; 15-a speed reducer; 16-rear telescopic support legs; 18-a swing seat; 19-big arm; 22-telescopic arm; 221-a first pivot; 222-a second pivot; 23-ceiling; 231-a top cover; 232-support bar; 24-a work basket; 241-a bottom plate; 242-upright post; 25-leveling oil cylinder; 251-a second leveling oil cylinder; 26-overturning the oil cylinder; 27-a telescopic oil cylinder; 28-pitch cylinder; 29-a first pin; 30-a second pin; 31-a pull rod; 32-a connecting portion; 33-a hinged seat; 34-a pivot; 36-a connecting rod; 37-range finder.

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 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 drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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 limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1 and 2, the present embodiment discloses a drill jumbo 100, which includes a chassis, a lift cab 9, a drill boom system, a platform arm system 3, a hydraulic oil tank 10, and a cable drum 14. The following description is with reference to the orientation of fig. 1.

Referring to fig. 3 and 4, the chassis includes a front frame 8 and a rear frame 12, and the front frame 8 is hinged to the rear frame 12; specifically, in the present embodiment, the front frame 8 is provided with a first connecting portion 81 protruding rearward, the rear frame 12 is provided with a second connecting portion 121 protruding forward, and the first connecting portion 81 and the second connecting portion 121 are provided with pin holes. Further, the first connecting portion 81 and the second connecting portion 121 are triangular in shape, and the angle of the triangle is slightly larger than 90 °; the angle is not suitable to be too large, and under the condition of too large angle, the distance between the front frame 8 and the rear frame 12 is too close, so that the turning effect is not good; the angle is not too small, and when the angle is too small, the distance between the front frame 8 and the rear frame 12 is too large, which is not favorable for the stability of the whole vehicle. In this embodiment, the angle of about 90 degrees can ensure a better turning effect and the stability of the whole vehicle.

Specifically, when assembled, the pin holes of the first connecting portion 81 and the second connecting portion 121 are aligned up and down and hinged together by the first pin 29. The front frame 8 and the rear frame 12 are connected in such an articulated manner, so that the turning radius of the drill jumbo 100 can be reduced, the effect is particularly obvious in a construction environment such as a tunnel, and the maneuverability of the drill jumbo 100 can be improved.

Preferably, a first ear plate 82 is disposed on one side of the front frame 8, a second ear plate 122 is disposed on the same side of the rear frame 12, and the first ear plate 82 and the second ear plate 122 are connected by a pull rod 31. Specifically, the first ear plate 82 and the second ear plate 122 are respectively provided with a through hole, and two ends of the pull rod 31 are respectively connected to the first ear plate 82 and the second ear plate 122 through the second pin 30. Because the front frame 8 and the rear frame 12 are hinged together and movably connected, when the drill jumbo 100 works, the front frame 8 and the rear frame 12 can rotate under the condition that the car body meets impact force, and the front frame 8 and the rear frame 12 can keep the current positions through the limiting action of the pull rod 31 so as to keep the stability during the work and prevent misoperation.

In the embodiment, the drill boom system and the platform arm system 3 are arranged at the front part of the front frame 8, and the lifting cab 9 is arranged at the rear part of the front frame 8 near the hinge joint; the hydraulic oil tank 10 is arranged at the front part of the rear frame 12 near the hinge joint, and the cable drum 14 is arranged at the rear part of the rear frame 12; such a layout arrangement maximizes the balance of the weight distribution of the front frame 8 and the rear frame 12. Of course, the rock-drilling rig 100 also comprises a front axle 7 and a rear axle 11. In order to ensure the stability of the rock drilling rig 100, the rock drilling rig 100 is further provided with a front telescopic support leg 6 and a rear telescopic support leg 16, the front telescopic support leg 6 being mounted in front of the front axle 7, the rear telescopic support leg 16 being mounted behind the rear axle 11. A vehicle body covering part 13 is covered above the rear frame 12.

Specifically, in this embodiment, an arm support 5 is disposed at the front end of the front frame 8, the drill boom system includes an arm support 2, a push beam 1, and two speed reducers 15, and the arm support 2 is hinged to the arm support 5 and can swing in the vertical direction and the horizontal direction. One of the speed reducers 15 is arranged at the front end part of the arm support 2, the other speed reducer 15 is arranged on the propelling beam 1, the two speed reducers 15 are connected, the axes of the two speed reducers are mutually vertical, and the two speed reducers 15 can rotate for 360 degrees, so that the drilling posture of the propelling beam 1 can be greatly expanded, and the working efficiency is improved.

Preferably, the number of the drill boom systems is two, and the two drill boom systems are respectively arranged on the left side and the right side of the boom support 5.

The platform arm system 3 comprises a platform arm, the platform arm further comprises a large arm 19, a telescopic arm 22 and a working platform, and the telescopic arm 22 is telescopically sleeved in the large arm 19 in a front-back manner; the working platform can be hinged at the front end of the telescopic arm 22 in an up-and-down swinging manner; and a leveling oil cylinder 25 for adjusting the vertical swing angle of the working platform is also arranged between the telescopic arm 22 and the working platform.

Referring to fig. 5 to 7, in one embodiment, the front end of the telescopic arm 22 is provided with a first pivot portion 221 and a second pivot portion 222, the first pivot portion 221 protrudes upwards in an inclined manner, and the second pivot portion 222 protrudes downwards in an inclined manner; the side of the working platform facing the telescopic arm 22 is provided with a connecting part 32 protruding downwards in an inclined manner, the connecting part 32 and the first pivoting part 221 are pivoted with each other, and the structure of the working platform protruding and extending in an inclined manner can enable the working platform to obtain a larger swinging space. The two ends of the leveling oil cylinder 25 are respectively hinged to the bottom of the working platform and the second pivoting portion 222, specifically, the driving end of the leveling oil cylinder 25 is hinged to the bottom of the working platform, and the telescopic end of the leveling oil cylinder 25 is hinged to the second pivoting portion 222. The device is used for keeping the working platform horizontal during working and is convenient for operators to stand in.

In the above embodiment, the platform arm system 3 further includes a telescopic cylinder 27, a driving end of the telescopic cylinder 27 is hinged on the large arm 19, and a telescopic end of the telescopic cylinder 27 is hinged on the telescopic arm 22. Specifically, a lug is arranged below the telescopic arm 22, the telescopic end of the telescopic oil cylinder 27 is hinged to the lug, and the driving end of the telescopic oil cylinder 27 is hinged to the outer wall of the large arm 19, so that the platform arm can be extended and shortened.

Specifically, in the above embodiment, the arm support base 5 is provided with a swing base 18 capable of swinging horizontally, and the swing base 18 is specifically installed in the middle position of the arm support base 5. The large arm 19 is hinged on the swing seat 18 in a vertically swinging manner, so that the platform arm can swing in the vertical direction and the horizontal direction, and the moving space of the working platform is further expanded.

Specifically, in the above embodiment, the platform arm system 3 further includes a second leveling cylinder 251 and a pitch cylinder 28, where two ends of the second leveling cylinder 251 are respectively hinged to the bottom of the swing seat 18 and the bottom of the rear end of the large arm 19, and are used to adjust the swing angle of the platform arm relative to the swing seat 18. Two ends of the pitching oil cylinders 28 are respectively hinged to the arm support 5 and the bottom wall of the rear end of the large arm 19, specifically, two pitching oil cylinders 28 are arranged, and the two pitching oil cylinders 28 are located on two sides of the platform arm and used for providing driving force for swinging of the platform arm. Furthermore, the telescopic end of the pitch cylinder 28 is hinged to a hinge seat 33 arranged on the arm support 5, the driving end of the pitch cylinder 28 is hinged to the outer wall of the large arm 19, and when the device is overlooked or viewed from side, a certain included angle is formed between the straight line of the pitch cylinder 28 and the straight line of the working arm.

Specifically, in the above embodiment, the work platform includes a work basket 24, a ceiling 23, and a turnover mechanism.

Referring to fig. 9, the work basket 24 includes a bottom plate 241 and a fence surrounding the bottom plate 241, and two columns 242 are disposed on one side of the work basket 24; the ceiling 23 comprises a top cover 231 and two support rods 232, the tops of the two support rods 232 are respectively fixedly connected to the top cover 231, and the bottom ends of the two support rods 232 are pivoted between the two upright posts 242 through a pivot 34, so that the ceiling 23 can be turned over up and down around the pivot 34; the turnover mechanism comprises a turnover piece and a turnover oil cylinder 26, the turnover piece is fixedly connected with the pivot 34, the driving end of the turnover oil cylinder 26 is hinged to the edge of the bottom plate 241, and the telescopic end of the turnover oil cylinder 26 is hinged to the turnover piece.

Specifically, in one embodiment, the turning member includes a cross bar and a connecting rod 36 respectively connected to two ends of the cross bar, the bottom end of the connecting rod 36 is fixedly connected to the pivot 34, and the cross bar is hinged to the telescopic end of the turning cylinder 26.

Referring to fig. 5, 8, 9 and 10, in normal operation, the tilting cylinder 26 extends to push the cross bar of the tilting member upward to a position, at this time, the top cover 231 of the ceiling 23 is located at a horizontal position, the two support rods 232 are inclined in side view and inclined toward the inside of the work basket 24, and this design is designed to shield the top cover 231 right above the work basket 24 as much as possible, so as to achieve an optimal protection effect. When an operator is required to perform construction operation right above the working basket 24, the overturning oil cylinder 26 contracts to pull the cross rod of the overturning part downwards to the right position, and the ceiling 23 is folded outside the working basket 24 at the moment, so that a space right above the working basket 24 is reserved, and the operator can perform construction conveniently. The turnover mechanism of the working platform is simple and reliable in design and convenient to maintain, and the working platform in a folded state is low in height and convenient to load and transport.

Referring to fig. 11, in one embodiment, the rock drilling rig 100 further comprises a positioning system including a controller, i.e. the controller of the rock drilling rig 100, and a plurality of distance meters 37. A plurality of distance meters 37 are mounted at different locations on the drill rig 100 for measuring the position information of the reference points of the vehicle body and the tunnel from the different locations of the vehicle body, and the controller receives the position information of the distance meters and calculates the specific location of the drill rig in the tunnel according to a set program. In particular, in some examples, there are two of the plurality of rangefinders 37 mounted respectively in front of and behind one side of the drill jumbo 100. The two distance meters 37 are configured to measure position information of the measuring point and a reference point of the tunnel inner wall from the front and the rear of the drill jumbo 100, respectively, transmit the measured position information to the controller, calculate a specific position of the drill jumbo 100 in the tunnel according to a set program by the controller, further position the boom, and position and size of the drill hole, and finally control the drill jumbo 100 to move so that the drill jumbo 100 moves to a desired position. According to the scheme, only the position information of a limited number of measuring points is required to be measured, and scanning measurement on a certain surface in the tunnel is not required, so that the data volume is greatly reduced, the calculation complexity and the storage space of the controller are reduced, and the method is simple and reliable.

It should be noted that the arrangement of two distance meters 37 in the above embodiment is only a preferred embodiment of the present invention, and it should be understood that the number of the distance meters 37 may be multiple in other embodiments.

To sum up, the working platform of the present invention is fixedly connected with a turning member on the pivot 34 of the ceiling 23, and the turning member is connected with a turning cylinder 26 and drives the turning member to move, so as to realize turning adjustment of the ceiling 23, and when an operator needs to perform construction operation right above the working platform, the ceiling 23 can be turned backwards and folded, thereby providing an operation space for construction; in addition, the ceiling 23 is turned over and folded, and then the height is reduced, so that loading and transportation are facilitated.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A work platform, its characterized in that: the turnover mechanism comprises a working basket, a ceiling and a turnover mechanism, wherein the working basket comprises a bottom plate and a fence surrounding the bottom plate, and two stand columns are arranged on one side of the working basket; the ceiling comprises a top cover and two supporting rods, the tops of the two supporting rods are respectively and fixedly connected to the top cover, and the bottom ends of the two supporting rods are pivoted between the two upright posts through a pivot shaft, so that the ceiling can be turned over up and down around the pivot shaft; the turnover mechanism comprises a turnover piece and a turnover oil cylinder, the turnover piece is fixedly connected with the pivot, the driving end of the turnover oil cylinder is hinged to the edge of the bottom plate, and the telescopic end of the turnover oil cylinder is hinged to the turnover piece.

2. The work platform of claim 1, wherein: the turnover part comprises a cross rod and connecting rods respectively connected with two ends of the cross rod, the bottom end of each connecting rod is fixedly connected to the pivot, and the cross rod is hinged to the telescopic end of the turnover oil cylinder.

3. A platform arm, comprising: comprises a big arm, a telescopic arm and a working platform according to any one of claims 1-2, wherein the telescopic arm can be telescopically sleeved in the big arm in a front-back manner; the working platform can be hinged at the front end of the telescopic arm in an up-and-down swinging manner; and a leveling oil cylinder for adjusting the vertical swing angle of the working platform is also arranged between the telescopic arm and the working platform.

4. The platform arm of claim 3, wherein: the utility model discloses a telescopic boom, including telescopic boom, work platform, connecting portion and first pin joint portion, the preceding tip of telescopic boom is equipped with first pin joint portion and second pin joint portion, work platform's installation side is equipped with the convex connecting portion down to one side, connecting portion and the mutual pin joint of first pin joint portion, the both ends of the hydro-cylinder of making level articulate respectively in work platform bottom and second pin joint portion.

5. The platform arm of claim 4, wherein: the telescopic boom is characterized by further comprising a telescopic oil cylinder, wherein the driving end of the telescopic oil cylinder is hinged to the large boom, and the telescopic end of the telescopic oil cylinder is hinged to the telescopic boom.

6. A rock drilling rig, characterized in that: the device comprises a chassis, a lifting cab, a drill boom system, a platform arm system, a hydraulic oil tank and a cable drum; the chassis comprises a front frame and a rear frame, and the front frame is hinged with the rear frame; the drill boom system and the platform arm are arranged at the front part of the front frame, and the lifting cab is arranged at the rear part of the front frame; the hydraulic oil tank is arranged at the front part of the rear frame, and the cable drum is arranged at the rear part of the rear frame; the platform arm system comprising a platform arm according to any of claims 3-5.

7. A rock drilling rig as claimed in claim 6, wherein: the front frame is provided with a first connecting part protruding backwards, the rear frame is provided with a second connecting part protruding forwards, the first connecting part and the second connecting part are provided with pin holes, and during assembly, the pin holes of the first connecting part and the second connecting part are aligned up and down and hinged together through a pin shaft.

8. A rock drilling rig as claimed in claim 7, wherein: one side of preceding frame is equipped with first otic placode, same one side of back frame is equipped with the second otic placode, first otic placode and second otic placode are connected through a pull rod.

9. A rock drilling rig as claimed in claim 6, wherein: the front frame is provided with an arm support seat, a swing seat capable of swinging horizontally is mounted on the arm support seat, and the large arm is hinged to the swing seat in a manner of swinging up and down; the platform arm system further comprises a second leveling oil cylinder and a pitching oil cylinder, wherein two ends of the second leveling oil cylinder are respectively hinged to the bottom of the swing seat and the bottom of the rear end of the large arm, and two ends of the pitching oil cylinder are respectively hinged to the arm support and the bottom wall of the rear end of the large arm.

10. A rock drilling rig as claimed in claim 6, wherein: the device comprises a rock drilling jumbo, and is characterized by further comprising a positioning system, wherein the positioning system comprises a controller and a plurality of distance meters, the distance meters are installed at different positions of the rock drilling jumbo and used for measuring position information of datum points of the rock drilling jumbo and the tunnel from different positions of the rock drilling jumbo, the controller receives the position information of the distance meters and calculates the specific position of the rock drilling jumbo in the tunnel according to a set program.