Rock drilling rig based on double-arm operation

Abstract

The present invention relates to the technical field of rock drilling equipment, and specifically discloses a rock drilling trolley based on double-arm operation, comprising: a vehicle body, a rock drilling arm frame is installed on the vehicle body, two rock drilling arms are arranged on the rock drilling arm frame, a hydraulic cylinder is arranged on the rock drilling arm, a positioning ring is arranged at the end of the rock drilling arm, a positioning assembly is arranged at the end of the rock drilling arm, the positioning assembly comprises a positioning shell, a positioning rod and a first driving mechanism, the positioning shell is arranged on the rock drilling arm and is located on the peripheral side of the positioning ring, a plurality of the positioning rods are distributed at intervals on the peripheral side of the positioning shell, the positioning rod is a telescopic rod, the first driving mechanism is used to drive the positioning rod to extend or shorten, and the positioning rod can stop against the face; the rock drilling trolley based on double-arm operation of the present invention can increase the gripping ability of the rock drilling arm through the positioning rod, thereby preventing the rock drilling arm from deviating during drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of rock drilling equipment, and in particular to a rock drilling trolley based on double-arm operation. Background Art

[0002] The rock drill rig is an important rock drilling equipment used in tunnel and underground engineering using the drill and blast method. It is mainly composed of the following parts: a steel structure frame, which supports the main structure of the entire equipment to ensure its stability and safety; a drill arm, which serves as the support, positioning and propulsion mechanism of the rock drill and can flexibly adjust the position and angle of the rock drill; a rock drill, which is the core component responsible for crushing and cutting rocks and is usually driven by hydraulics; a hydraulic system, which provides the power and control functions required by the rock drill rig, including key components such as hydraulic pumps, hydraulic cylinders and hydraulic control valves.

[0003] The rock drilling rig sucks liquid from the oil tank through the hydraulic pump in the hydraulic system and transports it to the hydraulic cylinder through the hydraulic pipeline. The high-pressure liquid pushes the piston in the hydraulic cylinder to move, thereby transmitting force to the working part of the rock drill to realize the rock drilling operation.

[0004] A Chinese patent with authorization announcement number CN219974503U discloses a double-arm rock drilling rig, which includes: a vehicle body, a rock drilling boom mounted on one side of the vehicle body, and a control end of the rock drilling boom electrically connected to a control end of the vehicle body, a lifting cab, a motor power assembly, a travel drive assembly, a heat dissipation assembly, a cable drum, a water cable drum, a water pump assembly, an air compressor assembly and an electric control box mounted on the vehicle frame, and a rock drilling boom mounted on one side of the vehicle frame.

[0005] The above patent adopts a segmented frame to reduce the turning radius of the drilling rig, making it convenient for the drilling rig to work in a smaller space. At the same time, the double-arm drilling rig carries a water cable reel, which is convenient for laying cables and water cables during work and facilitating the staff to layout the site. The staff can adjust the height of the lifting cab according to the actual situation on site, which is convenient for the staff to broaden their field of vision and facilitate operation.

[0006] However, the above patents and prior art usually use the end of the rock drill arm to stop against the face (a working face that is constantly moving forward in coal mining, mining or tunnel engineering) to achieve fixation. Since the face is usually uneven, the end of the rock drill arm is easily moved by force during the drilling process, resulting in deviation of the drilling angle or damage to the drill rod. When approaching the edge of the cave, the position of the forearm is limited, and there will be over-excavation and under-excavation, that is, the end of the rock drill arm cannot stop against the face, and the drill rod needs to extend out of the end of the rock drill arm to drill. At this time, the drill rod may be bent by force, resulting in unqualified drilling. Summary of the invention

[0007] The present invention provides a rock drilling trolley based on double-arm operation, aiming to solve the problem in the related art that the end of the rock drilling arm is easily moved by force, thereby causing the drilling angle to deviate or the drill rod to be damaged.

[0008] The rock drilling trolley based on double-arm operation of the present invention comprises: a vehicle body;

[0009] The vehicle body is provided with a rock drilling arm frame, the rock drilling arm frame is provided with two rock drilling arms, the rock drilling arms are provided with hydraulic cylinders, and the ends of the rock drilling arms are provided with positioning rings;

[0010] A positioning assembly is provided at the end of the rock drilling arm, and the positioning assembly includes a positioning shell, a positioning rod and a first driving mechanism. The positioning shell is provided on the rock drilling arm and is located on the circumference of the positioning ring. A plurality of positioning rods are distributed at intervals on the circumference of the positioning shell. The positioning rod is a telescopic rod. The first driving mechanism is used to drive the positioning rod to extend or shorten, and the positioning rod can stop against the face.

[0011] Beneficial effect: the positioning rod is driven to extend by the first driving mechanism, and the positioning rod can extend into the depression of the face, thereby improving the gripping ability of the rock drilling arm and preventing the rock drilling arm from deviating during drilling.

[0012] Preferably, the positioning rod includes a first rod and a second rod, the first rod can be received in the second rod, the first driving mechanism includes a first driving member, a driving ring and a driving block, a plurality of the driving blocks are slidably fitted on the driving ring, the driving ring is used to drive each of the driving blocks to move synchronously, the driving block extends into the corresponding first rod, a first stop block is elastically connected to the second rod, the first stop block can be received in the second rod, the driving block can stop against the first stop block, and the first driving member is provided on the rock drilling arm, which is used to drive the driving block to move.

[0013] Preferably, the second rod is also provided with a limiting mechanism, and the limiting mechanism includes a first limiting block and a second limiting block, the first limiting block is slidably fitted on the second rod and elastically connected to the second rod, the second limiting block is slidably fitted on the second rod and elastically connected to the second rod, the first limiting block and the second limiting block are vertically distributed, the second limiting block is provided with a first limiting groove, one end of the first limiting block can extend into the first limiting groove, and the other end thereof can stop against the driving block, the first rod is provided with a plurality of second limiting grooves distributed at intervals, the second limiting block can extend into the second limiting groove, and the second limiting groove can limit the second limiting block in one direction.

[0014] The effect is that the second limit block extends into the second limit groove, thereby achieving a clamping connection between the second limit block and the first rod, preventing the second rod from retracting into the first rod, and keeping the length of the positioning rod unchanged during the drilling process.

[0015] Preferably, a connecting rod is provided between the two positioning rods, and the two ends of the connecting rod are respectively connected to the two second rods. A positioning plate is fixedly connected to the connecting rod, and the positioning plate is distributed parallel to the positioning ring, and a positioning hole is provided on the positioning plate.

[0016] The effect is that when the position of the rock drill arm is limited and the positioning plate cannot stop against the face, the positioning rod moves forward and stops against the face, and the positioning plate and the second rod are extended synchronously, thereby reducing the distance between the positioning plate and the face, and the radial force exerted on the drill rod during drilling can be transmitted to the positioning plate, reducing the risk of the drill rod bending due to the radial force.

[0017] Preferably, the positioning rods are obliquely distributed on the positioning shell, and a trumpet-shaped structure is formed between the multiple positioning rods.

[0018] The effect is that the positioning rod is distributed obliquely so that the end of the positioning rod can be supported on the inner wall of the recessed part of the face or the side wall of the raised part, thereby improving the gripping ability of the positioning rod and preventing deviation during drilling.

[0019] Preferably, sliding blocks are slidably fitted at both ends of the connecting rod, and the sliding blocks can move inside the connecting rod. A sliding groove is provided at the end of the sliding block, and a sliding key is provided along the second rod of the sliding groove, and the sliding key is slidably fitted in the sliding groove.

[0020] Preferably, a third rod is further provided inside the second rod, and the third rod can extend out of the second rod. A second driving mechanism is provided on the second rod, and the second driving mechanism is used for driving the third rod to move.

[0021] The effect is that the positioning rod has a multi-stage telescopic structure, which can increase the maximum length of the positioning rod, so that drilling can be performed in narrower places, and the adaptability of the equipment to adverse environments is improved.

[0022] Preferably, the second driving mechanism includes a driving wheel, a driven wheel, a driving gear and a belt, a driving tooth groove is provided in the first rod, the driving wheel and the driven wheel are both rotatably connected to the second rod, and the two are spaced apart, the driving gear is fixedly connected to the driving wheel, the driving gear is meshed with the driving tooth groove, the belt is provided between the driving wheel and the driven wheel, and the third rod is fixedly connected to the belt.

[0023] Preferably, the end surface of the third rod has a plurality of spaced-apart granular structures, and the plurality of granular structures form a rough surface on the end surface of the third rod.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are:

[0025] According to the double-arm operation-based drilling trolley of the present invention, the first driving mechanism drives the positioning rod to extend, and the positioning rod can extend into the recess of the face, thereby improving the gripping ability of the drilling arm and preventing the drilling arm from deviating during drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a rock drilling trolley based on double-arm operation according to an embodiment of the present invention.

[0027] Figure 2 Schematic diagram of the structure of the rock drilling arm according to an embodiment of the present invention.

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0029] Figure 4 It is a schematic diagram of the installation of the positioning rod and the first driving mechanism according to an embodiment of the present invention.

[0030] Figure 5 It is a schematic diagram of the positioning plate structure of an embodiment of the present invention.

[0031] Figure 6 4 is a cross-sectional view of a first rod according to an embodiment of the present invention.

[0032] Figure 7 2 is a schematic diagram of a second rod structure according to an embodiment of the present invention.

[0033] Figure 8 4 is a schematic structural diagram of the second rod of the embodiment of the present invention from another viewing angle.

[0034] Fig. 9 4 is a cross-sectional view of a second rod according to an embodiment of the present invention.

[0035] Fig.10 It is a schematic diagram of the cooperation between the second rod and the third rod according to an embodiment of the present invention.

[0036] Fig.11 2 is a schematic diagram of a third rod structure according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] 1. frame; 2. rock drilling arm frame; 3. rock drilling arm; 4. positioning ring; 5. positioning assembly; 51. positioning shell; 52. positioning rod; 521. first rod; 5211. second limiting groove; 5212. driving tooth groove; 522. second rod; 5221. sliding key; 523. third rod; 531. first driving member; 5311. push rod; 532. driving block; 533. driving ring; 5331. first slide groove; 5332. second slide groove; 6. first stopper; 7. first elastic member; 8. first limiting block; 9. second elastic member; 10. second limiting block; 101. first limiting groove; 11. third elastic member; 12. positioning plate; 13. positioning hole; 14. connecting rod; 15. sliding block; 151. sliding groove; 16. driving wheel; 17. driven wheel; 18. driving gear; 19. belt. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] like Figures 1 to 11 As shown, the rock drilling rig based on double-arm operation of the present invention comprises: a frame 1.

[0041] Specifically, Figure 1 As shown, a drilling boom 2 is mounted on the vehicle frame 1, and two parallel and spaced drilling arms 3 are respectively provided on both sides of the drilling boom 2. A hydraulic cylinder and a motor are provided at one end of the drilling arm 3, and a positioning ring 4 and a positioning assembly 5 are provided at the other end thereof.

[0042] like Figure 2 and Figure 3 As shown, the positioning assembly 5 includes a positioning shell 51, a positioning rod 52 and a first driving mechanism. The positioning shell 51 is fixedly connected to the rock drilling arm 3. There are three positioning rods 52, which are distributed at intervals around the positioning shell 51. One of the positioning rods 52 is located at the top of the positioning shell 51, and the other two positioning rods 52 are symmetrically distributed below the positioning shell 51. The positioning rods 52 include a first rod 521, a second rod 522 and a third rod 523. The second rod 522 is slidably matched with the first rod 521 and can be received in the first rod 521. The third rod 523 is slidably matched with the second rod 522 and can be received in the second rod 522. The rear end of the first rod 521 is fixedly connected to the positioning shell 51, and the front end thereof is fixedly connected to the positioning shell 51 through a pad, so that the positioning rods 52 are obliquely distributed around the positioning shell 51. A trumpet-shaped structure is formed between the three positioning rods 52, and the large-diameter end of the trumpet-shaped structure is located at the front end. The front end of the third rod 523 has a plurality of granular structures distributed at intervals, so that a rough surface is formed at the front end of the third rod 523 , thereby improving the gripping ability of the third rod 523 .

[0043] like Figures 3 to 5 As shown, a connecting rod 14 is also provided between the two positioning rods 52 located below the positioning shell 51, and sliding blocks 15 are respectively slidably fitted at both ends of the connecting rod 14, and the sliding block 15 can slide in the connecting rod 14, and a sliding groove 151 is provided at the end of the sliding block 15, and a sliding key 5221 is provided at the front end of the second rod 522, and the sliding key 5221 is slidably fitted in the sliding groove 151, and a positioning plate 12 is fixedly connected to the connecting rod 14, and the positioning plate 12 is parallel to the positioning ring 4. A positioning hole 13 is also provided on the positioning plate 12, and the positioning hole 13 is coaxially distributed with the positioning ring 4, and the aperture of the positioning hole 13 is the same as the inner diameter of the positioning ring 4.

[0044] like Figure 4 ,and Figure 7 As shown, the first driving mechanism includes a first driving member 531, a driving ring 533 and a driving block 532. The first driving member 531 is a hydraulic cylinder, which is fixedly connected to the bottom of the rock drilling arm 3. The driving ring 533 is slidably matched on the positioning housing 51. The output end of the first driving member 531 is rotatably connected to two push rods 5311. The bottom of the driving ring 533 is provided with a first slide groove 5331, and the top thereof is provided with a second slide groove 5332. There are three driving blocks 532, two of which are slidably matched in the first slide groove 5331, and another driving block 532 is slidably matched in the second slide groove 5332. The two push rods 5311 are rotatably matched with the two driving blocks 532 in the first slide groove 5331 respectively. The first driving member 531 pushes the two driving blocks 532 in the first slide groove 5331 to move forward and backward through the push rod 5311, thereby pushing the driving ring 533 to move forward and backward synchronously, and the driving ring 533 drives the driving blocks 532 in the first slide groove 5331 to move forward and backward synchronously. Each driving block 532 can extend into the corresponding first rod 521. The second rod 522 is provided with a first stop block 6. The first stop block 6 is elastically connected to the second rod 522 through a first elastic member 7. The first elastic member 7 is a spring. The first stop block 6 can be received in the second rod 522. The top of the first stop block 6 is a double-bevel structure. The driving block 532 can stop against the first stop block 6.

[0045] like Figures 6 to 9As shown, a limiting mechanism is also provided on the second rod 522, and the limiting mechanism includes a first limiting block 8 and a second limiting block 10. The first limiting block 8 is slidably fitted on the second rod 522, and is distributed in parallel with the second rod 522. The first limiting block 8 and the second rod 522 are elastically connected through a first elastic member 7, and the first elastic member 7 is a spring. The second limiting block 10 is arranged behind the first stopper 6, and the two are distributed at intervals. The second limiting block 10 is slidably fitted with the second rod 522. The second limiting block 10 is elastically connected to the second rod 522 through a third elastic member 11, and the third elastic member 11 is a spring. The first limiting block 8 and the second limiting block 10 are distributed vertically. A first limiting groove 101 is provided on the second limiting block 10. The rear end of the first limiting block 8 can extend into the first limiting groove 101, and its front end can stop with the driving block 532. The first limiting groove 101 is a bevel groove, and the rear end of the first limiting block 8 has a bevel structure corresponding to the first limiting groove 101. The inner wall of the third rod 523 is provided with a plurality of second limiting grooves 5211 distributed at intervals, the rear end of the second limiting groove 5211 is a sloped end, the second limiting block 10 can extend into the second limiting groove 5211, and the second limiting groove 5211 can limit the second limiting block 10 in one direction. When the second limiting block 10 extends into the second limiting groove 5211, the second limiting groove 5211 can limit the second limiting block 10 from moving backwards, thereby preventing the second rod 522 from retracting into the first rod 521.

[0046] The first driving member 531 pushes the driving block 532 to move forward, and the driving block 532 stops with the first stop block 6 and applies a forward thrust to the first stop block 6, so that the second rod 522 can extend out of the third rod 523. When the positioning plate 12 stops with the palm face, the driving block 532 continues to move forward, and the driving block 532 presses the first stop block 6 into the second rod 522 and moves past the second stop block to the front of the second stop block. At this time, the driving block 532 is out of contact with the first limiting block 8, and the second elastic member 9 contracts, so that the first limiting block 8 withdraws from the first limiting groove 101 and releases the limiting of the second limiting block 10. The third elastic member 11 stretches and presses the second limiting block 10 into the second limiting groove 5211, thereby limiting the forward movement of the second rod 522.

[0047] like Figures 9 to 11As shown, a second driving mechanism is also provided on the second rod 522, and the second driving mechanism includes a driving wheel 16, a driven wheel 17, a driving gear 18 and a belt 19. The driving wheel 16 is rotatably matched with the rear end of the side wall of the second rod 522, and the driven wheel 17 is rotatably matched with the front end of the side wall of the second rod 522. The two ends of the belt 19 are respectively frictionally matched with the driving wheel 16 and the driven wheel 17. The driving gear 18 is fixedly connected to the driving wheel 16. A driving tooth groove 5212 is provided on the inner wall of the first rod 521, and the driving gear 18 is engaged with the driving tooth groove 5212. When the second rod 522 extends out of the first rod 521, the driving gear 18 moves along the driving tooth groove 5212 and rotates. The driving gear 18 drives the driving wheel 16 to rotate, and the driving wheel 16 drives the belt 19 to perform a circular motion, and the belt 19 drives the third rod 523 to extend out of the second rod 522.

[0048] According to the rock drilling rig based on double-arm operation of the present invention, the rear end of the drill rod is inserted into the hydraulic cylinder, the hydraulic device is used to control the forward and backward movement of the drill rod, the motor is used to drive the drill rod to rotate, and the front end of the drill rod extends into the positioning ring 4 and the positioning hole 13, and the side wall of the drill rod fits with the inner wall of the positioning ring 4 and the positioning hole 13. The frame 1 moves forward until the positioning plate 12 stops at the face, and the second rod 522 is driven to extend out of the first rod 521 by the first driving member 531. During this process, the third rod 523 synchronously extends out of the second rod 522, and the sliding key 5221 gradually slides to the rear end of the sliding groove 151, so that the positioning plate 12 can move backward relative to the second rod 522 when the second rod 522 extends forward. In the process of the second rod 522 and the third rod 523 extending forward, if the third rod 523 stops at the face, the corresponding driving block 532 will pass over the first stopper 6 and continue to move forward. Until all the third rods 523 are stopped against the face, the first driving member 531 continues to push the driving block 532 to move forward until one of the driving blocks 532 is stopped against the corresponding second rod 522. At this time, the first driving member 531 applies a forward thrust to fix the positioning rod 52 on the face. Since the three positioning rods 52 are distributed in a trumpet shape, the end of the third rod 523 can be stopped against the inner wall of the recess or the side wall of the protrusion of the face, thereby preventing the rock drilling arm 3 from sliding on the face, and the drill hole can pass through the positioning plate 12 and drill the rock wall.

[0049] When drilling holes on the edge of the mountain, the frame 1 cannot move to the point where the positioning plate 12 stops at the face of the tunnel. At this time, the first driving member 531 drives the driving block 532 to move forward, thereby pushing the second rod 522 to extend out of the first rod 521, and the third rod 523 synchronously extends out of the second rod 522. The positioning plate 12 and the second rod 522 move forward synchronously. When all the third rods 523 stop at the face of the tunnel, the drill rod extends out of the positioning plate 12 and drills holes in the rock wall. Since the positioning plate 12 and the second rod 522 move forward synchronously, the distance between the positioning plate 12 and the face of the tunnel is shortened. The radial force exerted on the drill rod during drilling can be transmitted to the positioning plate 12, thereby reducing the risk of bending due to the radial force.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A rock drilling rig based on double-arm operation, comprising: A vehicle body, wherein a rock drilling arm frame is mounted on the vehicle body, two rock drilling arms are arranged on the rock drilling arm frame, a hydraulic cylinder is arranged on the rock drilling arm, and a positioning ring is arranged at the end of the rock drilling arm; The invention is characterized in that a positioning assembly is provided at the end of the rock drilling arm, and the positioning assembly comprises a positioning shell, a positioning rod and a first driving mechanism, the positioning shell is provided on the rock drilling arm and is located on the peripheral side of the positioning ring, a plurality of positioning rods are distributed at intervals on the peripheral side of the positioning shell, the positioning rod is a telescopic rod, the first driving mechanism is used to drive the positioning rod to extend or shorten, and the positioning rod can stop against the face; The positioning rod comprises a first rod and a second rod, the first rod can be received in the second rod, the first driving mechanism comprises a first driving member, a driving ring and a driving block, a plurality of the driving blocks are slidably fitted on the driving ring, the driving ring is used to drive each of the driving blocks to move synchronously, the driving block extends into the corresponding first rod, a first stopper is elastically connected to the second rod, the first stopper can be received in the second rod, the driving block can stop against the first stopper, and the first driving member is provided on the rock drilling arm, and is used to drive the driving block to move; The second rod is also provided with a limiting mechanism, which includes a first limiting block and a second limiting block, the first limiting block is slidably fitted on the second rod and elastically connected to the second rod, the second limiting block is slidably fitted on the second rod and elastically connected to the second rod, the first limiting block and the second limiting block are vertically distributed, the second limiting block is provided with a first limiting groove, one end of the first limiting block can extend into the first limiting groove, and the other end thereof can stop against the driving block, the first rod is provided with a plurality of second limiting grooves distributed at intervals, the second limiting block can extend into the second limiting groove, and the second limiting groove can limit the second limiting block in one direction.

2. The rock drilling rig based on double-arm operation according to claim 1, characterized in that: A connecting rod is provided between the two positioning rods, and the two ends of the connecting rod are respectively connected to the two second rods. A positioning plate is fixedly connected to the connecting rod, and the positioning plate is distributed parallel to the positioning ring. A positioning hole is provided on the positioning plate.

3. The rock drilling rig based on double-arm operation according to claim 2, characterized in that: The positioning rods are obliquely distributed on the positioning housing, and a trumpet-shaped structure is formed between the plurality of positioning rods.

4. The rock drilling rig based on double-arm operation according to claim 3, characterized in that: The two ends of the connecting rod are respectively slidably matched with sliding blocks, and the sliding blocks can move in the connecting rod. The ends of the sliding blocks are provided with sliding grooves, and the sliding grooves are provided with sliding keys along the second rod, and the sliding keys are slidably matched in the sliding grooves.

5. The rock drilling rig based on double-arm operation according to claim 4, characterized in that: A third rod is also arranged inside the second rod, and the third rod can extend out of the second rod. A second driving mechanism is arranged on the second rod, and the second driving mechanism is used for driving the third rod to move.

6. The rock drilling rig based on double-arm operation according to claim 5, characterized in that: The second driving mechanism includes a driving wheel, a driven wheel, a driving gear and a belt. A driving tooth groove is provided in the first rod. The driving wheel and the driven wheel are both rotatably connected to the second rod and are spaced apart. The driving gear is fixedly connected to the driving wheel and meshes with the driving tooth groove. The belt is provided between the driving wheel and the driven wheel, and the third rod is fixedly connected to the belt.

7. The rock drilling rig based on double-arm operation according to claim 6, characterized in that: The end surface of the third rod has a plurality of spaced-apart granular structures, and the plurality of granular structures form a rough surface on the end surface of the third rod.

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