Rock drilling device for tunneling construction

Abstract

The invention discloses a rock drilling device for tunneling construction, and relates to the technical field of tunnel construction, the rock drilling device comprises a drilling shaft, a rotating mechanism and a cracking mechanism, the end part of the drilling shaft is fixedly connected with a drill bit, the other end of the drilling shaft is fixedly connected with a rotating shaft, and the outer side surface of the rotating shaft is sleeved with a fixing sleeve; the rotating mechanism is installed on the fixing sleeve and connected with the rotating shaft. And the cracking mechanism comprises multiple sets of extrusion pieces installed on the outer side face of the drilling shaft, the extrusion pieces are connected with an expansion assembly installed in the drilling shaft, and the expansion assembly is used for driving the multiple sets of extrusion pieces to expand outwards at the same time to extrude rocks. The rock removing process can be completed without replacing equipment, the working efficiency is improved, and the problem that in the prior art, equipment needs to be replaced in the rock removing process, operation is troublesome, and consequently the working efficiency is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, in particular to a rock drilling device for tunnel excavation construction. Background Art

[0002] Tunnel boring is mainly used in the construction of transportation infrastructure, such as railway tunnels and highway tunnels, to enable transportation routes to pass through obstacles such as mountains, shorten distances and improve transportation efficiency. In addition, tunnel boring is also used in water conservancy projects, such as water transmission tunnels for hydroelectric power stations, and underground space development, including underground shopping malls, parking lots, warehouses and military facilities.

[0003] Currently, during tunnel excavation, rock obstacles are often encountered. In order to proceed normally, the rock needs to be removed. In the existing technology, the rock removal is done by using a rock drilling device. The drilling device drills a hole in the rock, and then a squeezing device is inserted into the hole to squeeze the rock, causing it to crack and thus facilitate its removal. The rock drilling device in the existing technology has a single function and can only achieve the function of drilling, but cannot squeeze the rock to cause it to crack. Furthermore, the rock removal work requires the assistance of other equipment, which makes the operation more complicated and reduces the efficiency of rock removal. To this end, we propose a rock drilling device for tunnel excavation construction. Summary of the Invention

[0004] The object of the present invention is to provide a rock drilling device for tunnel excavation construction to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a rock drilling device for tunnel excavation construction, comprising a drilling shaft, a rotating mechanism and a fracture mechanism, wherein the end of the drilling shaft is fixedly connected to a drill bit, and the other end of the drilling shaft is fixedly connected to a rotating shaft, and the outer side surface of the rotating shaft is sleeved with a fixed sleeve; the rotating mechanism is installed on the fixed sleeve and connected to the rotating shaft, and the rotating mechanism is used to drive the drilling shaft to rotate, thereby rotating the drill bit to drill a hole in the rock; the fracture mechanism includes multiple groups of extrusion plates installed on the outer side surface of the drilling shaft, and the extrusion plates are connected to an expansion assembly installed inside the drilling shaft, and the expansion assembly is used to drive multiple groups of the extrusion plates to expand outward at the same time to extrude the rock, and the expansion assembly is linked to a limiting assembly, and the limiting assembly is used to limit the rotating shaft.

[0006] Preferably, the rotating mechanism includes a fixing ring fixedly connected to the fixing sleeve, a motor is fixedly connected to the fixing ring, a drive shaft is fixedly connected to the output end of the motor, a transmission assembly is connected to the end of the drive shaft, a rotating sleeve is connected to the transmission assembly, and the rotating sleeve is fixedly connected to the rotating shaft.

[0007] Preferably, the transmission assembly includes a rotating plate fixedly connected to the rotating sleeve, one end of the rotating plate is rotatably connected to a ratchet gear fixedly connected to the drive shaft, the drive shaft is rotatably connected to the rotating plate, and a pawl is engaged on the outer side of the ratchet gear, the pawl is fixedly connected to a rotating column rotatably connected to the rotating plate, the rotating column is fixedly connected to a connecting piece, and the connecting piece is fixedly connected to a torsion spring fixedly connected to the rotating plate.

[0008] Preferably, the expansion assembly includes multiple groups of sliding grooves that are slidably connected to the drilling shaft, multiple groups of first oblique blocks are slidably connected in the sliding grooves, multiple groups of first oblique blocks are respectively fixedly connected to multiple groups of extrusion sheets, and second oblique blocks are slidably fitted on the oblique sides of the first oblique blocks, and the ends of multiple groups of second oblique blocks are fixedly connected to connecting plates that are slidably connected to the drilling shaft, connecting columns are fixedly connected between the multiple groups of connecting plates located at both ends of the drilling shaft, and a moving part for driving the connecting columns to move is connected between the two groups of connecting columns.

[0009] Preferably, the movable part includes a connecting block installed inside the drilling shaft, both ends of the connecting block are fixedly connected to threaded rods, two groups of the threaded rods are respectively threadedly connected to two groups of the connecting columns, and the thread directions of the two groups of the threaded rods are opposite, and the ends of the threaded rods close to the fixed sleeve are fixedly connected to the connecting shaft, the connecting column is sleeved on the outer side of the connecting shaft, and a slot is opened at the end of the connecting shaft, and a docking piece connected to the driving shaft is provided inside the slot.

[0010] Preferably, the docking part includes an insertion rod slidably connected to the drive shaft, a sliding block slidably connected to the drive shaft is fixedly connected to the insertion rod, the outer side of the sliding block is rotatably connected to a connecting disk, a plurality of groups of support blocks are fixedly connected to the connecting disk, and a telescopic rod fixedly connected to the fixed sleeve is fixedly connected to the support block.

[0011] Preferably, the limiting assembly includes a limiting ring fixed to the outer side surface of the rotating shaft, an extrusion ring is provided on the outer side surface of the limiting ring, a connecting rod is fixedly connected to the extrusion ring, the outer side surface of the connecting rod is fixedly connected to a moving block slidably connected to the fixed sleeve, the moving block is connected to an elastic member connected to the connecting rod, and the moving block is also connected to a pushing member for pushing the extrusion ring to move, thereby causing the extrusion ring to extrude the limiting ring.

[0012] Preferably, the pushing member includes a fixed block fixedly connected to the connecting plate, a pushing rod fixedly connected to the fixed block, the end of the pushing rod fixedly connected to a third inclined block, the oblique side of the third inclined block is slidably fitted with a fourth inclined block, and the fourth inclined block is fixedly connected to the moving block.

[0013] Preferably, the elastic member includes a fixing seat fixedly connected to the fixing sleeve, the fixing seat is slidably connected to the connecting rod, and a tension spring is fixedly connected to the fixing seat and is sleeved on the outer side of the connecting rod, and the end of the tension spring is fixedly connected to the moving block.

[0014] Preferably, a handle is fixedly connected to the fixed sleeve, and an anti-slip sleeve is provided on the handle to facilitate holding the handle to operate the device to drill and crack rocks. The design of the anti-slip sleeve can increase the friction between the hand and the device, thereby preventing the device from slipping during operation.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a rock drilling device for tunnel excavation construction. The device is provided with a rotating mechanism and a cracking mechanism. During the process of processing the rock, the rotating mechanism is used to cause the drill bit to drill the rock, so that the extrusion sheet is gradually located in the hole. Thereafter, the expansion component provided in the cracking mechanism causes the multiple groups of extrusion sheets on the outer side surfaces of the drilling shaft to expand outward at the same time. The rock is squeezed by the expansion of the extrusion sheets, so that the rock is cracked due to pressure. Therefore, the rock removal process can be completed without replacing the equipment, thereby improving the work efficiency, thereby solving the problem in the prior art that the equipment needs to be replaced during the rock removal process, the operation is troublesome and leads to low work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the connection and cooperation structure of the rotating mechanism and the breaking mechanism of the present invention; Figure 4 This is a schematic diagram of the rotating mechanism structure of the present invention; Figure 5 This is a schematic diagram of the transmission assembly structure of the present invention; Figure 6 This is a schematic diagram of the expansion assembly structure of the present invention; Figure 7 This is a schematic diagram of the structure of the moving part of the present invention; Figure 8 This is a structural diagram of the docking piece of the present invention; Figure 9This is a schematic diagram of the structure of the limit assembly of the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the structure of area A.

[0017] In the figure: 1, drilling shaft; 2, drill bit; 3, rotating shaft; 4, fixed sleeve; 6, rotating mechanism; 7, breaking mechanism; 8, extrusion plate; 9, expansion assembly; 10, limit assembly; 11, fixing ring; 12, motor; 13, drive shaft; 14, transmission assembly; 15, rotating sleeve; 16, rotating plate; 17, ratchet gear; 18, pawl; 19, rotating column; 20, connecting plate; 21, torsion spring; 22, sliding groove; 23, first inclined block; 24, second inclined block; 25, connecting plate; 26, Connecting column; 27. Moving part; 28. Connecting block; 29. Threaded rod; 30. Connecting shaft; 31. Slot; 32. Docking part; 33. Insert rod; 34. Connecting plate; 35. Support block; 36. Telescopic rod; 37. Limiting ring; 38. Extrusion ring; 39. Connecting rod; 40. Moving block; 41. Elastic part; 42. Pushing part; 43. Fixed block; 44. Pushing rod; 45. Third oblique block; 46. Fourth oblique block; 47. Fixed seat; 48. Tension spring; 49. Handle; 50. Sliding block. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figures 1-10The present invention provides a technical solution: a rock drilling device for tunnel excavation construction, comprising a drilling shaft 1, a rotating mechanism 6, and a cracking mechanism 7. The end of the drilling shaft 1 is fixedly connected to a drill bit 2, and the other end of the drilling shaft 1 is fixedly connected to a rotating shaft 3. The outer side of the rotating shaft 3 is sleeved with a fixed sleeve 4, and the fixed sleeve 4 is fixedly connected to a handle 49. The handle 49 is provided with an anti-slip sleeve, which is convenient for holding the handle 49 to operate the device to drill and crack the rock. The design of the anti-slip sleeve can increase the friction between the handle and the hand, thereby preventing the device from slipping during operation. The rotating mechanism 6 is installed on the fixed sleeve 4 and is connected to the rotating shaft 3. The rotating mechanism 6 is used to drive the drilling shaft 1 to rotate, thereby rotating the drill bit 2 to drill the rock; the cracking mechanism 7 includes multiple groups of extrusion plates 8 installed on the outer side of the drilling shaft 1, and the extrusion plates 8 are connected to the expansion components 9 installed inside the drilling shaft 1. The expansion component 9 is used to drive multiple groups of the extrusion plates 8 to expand outward at the same time to extrude the rock. The expansion component 9 is linked to a limiting component 10, and the limiting component 10 is used to limit the rotating shaft 3.

[0020] See also Figure 2-Figure 4 The rotating mechanism 6 shown in the figure includes a fixed ring 11 fixedly connected to the fixed sleeve 4, a motor 12 fixedly connected to the fixed ring 11, an output end of the motor 12 fixedly connected to a drive shaft 13, an end of the drive shaft 13 is connected to a transmission assembly 14, a rotating sleeve 15 is connected to the transmission assembly 14, and the rotating sleeve 15 is fixedly connected to the rotating shaft 3.

[0021] See also Figure 4 and Figure 5 The transmission assembly 14 shown in the figure includes a rotating plate 16 fixedly connected to the rotating sleeve 15, one end of the rotating plate 16 is rotatably connected to a ratchet gear 17 fixedly connected to the drive shaft 13, the drive shaft 13 is rotatably connected to the rotating plate 16, and a pawl 18 is engaged with the outer side of the ratchet gear 17, the pawl 18 is fixedly connected to a rotating column 19 rotatably connected to the rotating plate 16, the rotating column 19 is fixedly connected to a connecting piece 20, and the connecting piece 20 is fixedly connected to a torsion spring 21 fixedly connected to the rotating plate 16.

[0022] See also Figure 3 and Figure 6The expansion assembly 9 shown in the figure includes multiple groups of sliding grooves 22 slidably connected to the drilling shaft 1, and multiple groups of first inclined blocks 23 are slidably connected in the sliding grooves 22. The multiple groups of first inclined blocks 23 are respectively fixedly connected to the multiple groups of extrusion sheets 8, and the second inclined blocks 24 are slidably fitted on the oblique sides of the first inclined blocks 23. The ends of the multiple groups of second inclined blocks 24 are fixedly connected to connecting plates 25 slidably connected to the drilling shaft 1. Connecting columns 26 are fixedly connected between the multiple groups of connecting plates 25 located at both ends of the drilling shaft 1, and a moving part 27 for driving the connecting columns 26 to move is connected between the two groups of connecting columns 26.

[0023] See also Figure 6 and Figure 7 The movable member 27 shown in the figure includes a connecting block 28 installed inside the drilling shaft 1, and threaded rods 29 are fixedly connected to both ends of the connecting block 28. The two groups of threaded rods 29 are respectively threadedly connected to the two groups of connecting columns 26, and the thread directions of the two groups of threaded rods 29 are opposite, and the ends of the threaded rods 29 close to the fixed sleeve 4 are fixedly connected to the connecting shaft 30. The connecting column 26 is sleeved on the outer side of the connecting shaft 30, and a slot 31 is opened at the end of the connecting shaft 30. A docking piece 32 connected to the drive shaft 13 is provided inside the slot 31.

[0024] See also Figure 7-Figure 8 The docking member 32 shown in the figure includes an insertion rod 33 that is slidably connected to the drive shaft 13, and a sliding block 50 that is slidably connected to the drive shaft 13 is fixedly connected to the insertion rod 33. The outer side of the sliding block 50 is rotatably connected to a connecting disk 34, and a plurality of groups of support blocks 35 are fixedly connected to the connecting disk 34. The support block 35 is fixedly connected to a telescopic rod 36 that is fixedly connected to the fixed sleeve 4.

[0025] See also Figure 3 、 Figure 9 and Figure 10 The limiting assembly 10 shown in the figure includes a limiting ring 37 fixed to the outer side surface of the rotating shaft 3, and an extrusion ring 38 is provided on the outer side surface of the limiting ring 37. A connecting rod 39 is fixedly connected to the extrusion ring 38, and a moving block 40 slidably connected to the fixed sleeve 4 is fixedly connected to the outer side surface of the connecting rod 39. The moving block 40 is connected to an elastic member 41 connected to the connecting rod 39, and the moving block 40 is also connected to a pushing member 42 for pushing the extrusion ring 38 to move, thereby causing the extrusion ring 38 to extrude the limiting ring 37.

[0026] See also Figure 9 and Figure 10The pushing member 42 shown in the figure includes a fixed block 43 fixedly connected to the connecting plate 25, a pushing rod 44 fixedly connected to the fixed block 43, the end of the pushing rod 44 fixedly connected to a third inclined block 45, the oblique side of the third inclined block 45 is slidably fitted with a fourth inclined block 46, and the fourth inclined block 46 is fixedly connected to the moving block 40.

[0027] See also Figure 9 and Figure 10 The elastic member 41 shown in the figure includes a fixing seat 47 fixedly connected to the fixing sleeve 4, the fixing seat 47 is slidably connected to the connecting rod 39, and a tension spring 48 is fixedly connected to the fixing seat 47 and is sleeved on the outer side of the connecting rod 39, and the end of the tension spring 48 is fixedly connected to the moving block 40.

[0028] Working principle: During the rock removal process, the drill bit 2 is aimed at the rock by holding the handle 49, and then the motor 12 is started by controlling the motor 12. The start of the motor 12 causes the drive shaft 13 to rotate, thereby driving the ratchet gear 17 to rotate. At this time, the rotation of the ratchet gear 17 will engage with the pawl 18 to drive the rotating plate 16 to rotate, thereby driving the rotating sleeve 15 to rotate. The rotation of the rotating sleeve 15 drives the rotating shaft 3 to rotate, thereby causing the drilling shaft 1 and the drill bit 2 to rotate, and the rock is drilled by the rotation of the drill bit 2; Furthermore, after the drilling is completed, the drilling shaft 1 will cause the extrusion sheet 8 to be located inside the hole. At this time, the telescopic rod 36 is activated, and the activation of the telescopic rod 36 will pull the support block 35 to move and the connecting plate 34 to move. The movement of the connecting plate 34 causes the sliding block 50 to drive the insert block to move into the slot 31. In this process, the movement of the connecting plate 34 causes the fixed block 43 to drive the push rod 44 to move, and the movement of the push rod 44 drives the fourth inclined block 46 to move. The movement of the fourth inclined block 46 squeezes the third inclined block 45, so that the third inclined block 45 moves. The movement of the third inclined block 45 drives the moving block 40 to move. The movement of the moving block 40 causes the connecting rod 39 to drive the extrusion ring 38 to move. The movement of the extrusion ring 38 squeezes the limiting ring 37, and then the extrusion of the extrusion ring 38 limits the limiting ring 37, thereby limiting the rotating shaft 3. Among them, the motor 12 is then controlled to reverse, and the reverse rotation of the motor 12 drives the drive shaft 13 to reverse, thereby causing the ratchet gear 17 to reverse. At this time, the ratchet gear 17 and the pawl 18 will be disengaged, and will not drive the rotating plate 16 to rotate, that is, the rotating sleeve 15 and the rotating shaft 3 will not rotate during this process, and the drilling shaft 1 and the drill bit 2 will not rotate. In this state, the rotation of the drive shaft 13 will drive the insertion rod 33 to rotate, and then drive the connecting shaft 30 to rotate (the rotation of the drive shaft 13 will drive the sliding block 50 to rotate, and the sliding block 50 and the connecting disk 34 are rotationally connected, and during the rotation of the sliding block 50, the connecting disk 34 The rotation of the connecting shaft 30 causes the threaded rod 29 to rotate, and the rotation of the connecting block 28 causes the other set of threaded rods 29 to rotate. When the motor 12 rotates in the reverse direction, the two sets of threaded rods 29 rotate simultaneously. Since the two sets of threaded rods 29 rotate in opposite directions, the two sets of connecting columns 26 move away from each other at the same time, causing the connecting plate 25 to drive the second inclined block 24 to move. The movement of the second inclined block 24 squeezes the first inclined block 23, and the squeezing action causes the first inclined block 23 to drive the squeezing sheet 8 to move. The movement of the squeezing sheet 8 squeezes the rock, causing the rock to crack. Furthermore, during the above process, the rotating shaft 3 is limited by the limiting ring 37 and the extrusion ring 38, so that during the expansion of the extrusion piece 8, the rotating shaft 3 will not rotate, thereby preventing the drilling shaft 1 and the drill bit 2 from rotating. As a result, the rotation of the threaded rod 29 can normally drive the movement of the connecting column 26. Among them, the optimal way to use the device designed in this scheme is that when the rock volume is too large, the drilling should be gradually moved from the position near the edge of the rock to the middle of the rock, thereby facilitating the cracking of the rock.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rock drilling device for tunnel excavation construction, comprising: A drilling shaft (1), wherein the end of the drilling shaft (1) is fixedly connected to a drill bit (2), and the other end of the drilling shaft (1) is fixedly connected to a rotating shaft (3), and the outer side surface of the rotating shaft (3) is provided with a fixed sleeve (4); It is characterized by further comprising: A rotating mechanism (6), the rotating mechanism (6) being mounted on the fixed sleeve (4) and connected to the rotating shaft (3), the rotating mechanism (6) being used to drive the drilling shaft (1) to rotate, thereby causing the drill bit (2) to rotate to drill a hole in the rock; A cracking mechanism (7), the cracking mechanism (7) comprises a plurality of groups of extrusion plates (8) mounted on the outer side of the drilling shaft (1), the extrusion plates (8) being connected to an expansion assembly (9) mounted inside the drilling shaft (1), the expansion assembly (9) being used to drive the plurality of groups of the extrusion plates (8) to simultaneously expand outward to extrude the rock, the expansion assembly (9) being linked to a limiting assembly (10), the limiting assembly (10) being used to limit the rotating shaft (3).

2. A rock drilling device for tunnel excavation construction according to claim 1, characterized in that: The rotating mechanism (6) comprises a fixing ring (11) fixedly connected to the fixing sleeve (4), a motor (12) fixedly connected to the fixing ring (11), an output end of the motor (12) fixedly connected to a drive shaft (13), an end of the drive shaft (13) connected to a transmission assembly (14), a rotating sleeve (15) connected to the transmission assembly (14), and the rotating sleeve (15) fixedly connected to the rotating shaft (3).

3. A rock drilling device for tunnel excavation construction according to claim 2, characterized in that: The transmission assembly (14) includes a rotating plate (16) fixedly connected to the rotating sleeve (15), one end of the rotating plate (16) is rotatably connected to a ratchet gear (17) fixedly connected to the drive shaft (13), the drive shaft (13) is rotatably connected to the rotating plate (16), and a pawl (18) is meshed on the outer side of the ratchet gear (17), the pawl (18) is fixedly connected to a rotating column (19) rotatably connected to the rotating plate (16), the rotating column (19) is fixedly connected to a connecting piece (20), and the connecting piece (20) is fixedly connected to a torsion spring (21) fixedly connected to the rotating plate (16).

4. A rock drilling device for tunnel excavation construction according to claim 3, characterized in that: The expansion assembly (9) comprises a plurality of sliding grooves (22) slidably connected to the drilling shaft (1), a plurality of first inclined blocks (23) are slidably connected in the sliding grooves (22), the plurality of first inclined blocks (23) are respectively fixedly connected to the plurality of extrusion sheets (8), and a second inclined block (24) is slidably fitted on the oblique sides of the first inclined blocks (23), the ends of the plurality of second inclined blocks (24) are fixedly connected to a connecting plate (25) slidably connected to the drilling shaft (1), a connecting column (26) is fixedly connected between the plurality of connecting plates (25) located at both ends of the drilling shaft (1), and a moving member (27) for driving the connecting column (26) to move is connected between two groups of the connecting columns (26).

5. A rock drilling device for tunnel excavation construction according to claim 4, characterized in that: The movable member (27) comprises a connecting block (28) mounted inside the drilling shaft (1), both ends of the connecting block (28) are fixedly connected with threaded rods (29), two groups of threaded rods (29) are respectively threadedly connected to two groups of connecting columns (26), and the thread directions of the two groups of threaded rods (29) are opposite, and the ends of the threaded rods (29) close to the fixed sleeve (4) are fixedly connected with a connecting shaft (30), the connecting column (26) is sleeved on the outer side of the connecting shaft (30), and the end of the connecting shaft (30) is provided with a slot (31), and a docking member (32) connected to the driving shaft (13) is provided inside the slot (31).

6. A rock drilling device for tunnel excavation construction according to claim 5, characterized in that: The docking member (32) includes an insertion rod (33) slidably connected to the drive shaft (13), a sliding block (50) slidably connected to the drive shaft (13) is fixedly connected to the insertion rod (33), an outer side surface of the sliding block (50) is rotatably connected to a connecting disk (34), a plurality of support blocks (35) are fixedly connected to the connecting disk (34), and a telescopic rod (36) fixedly connected to the fixed sleeve (4) is fixedly connected to the support block (35).

7. A rock drilling device for tunnel excavation construction according to claim 6, characterized in that: The limiting assembly (10) includes a limiting ring (37) fixed to the outer side surface of the rotating shaft (3), an extrusion ring (38) is provided on the outer side surface of the limiting ring (37), a connecting rod (39) is fixedly connected to the extrusion ring (38), a moving block (40) slidably connected to the fixed sleeve (4) is fixedly connected to the outer side surface of the connecting rod (39), an elastic member (41) connected to the connecting rod (39) is connected to the moving block (40), and a pushing member (42) for pushing the extrusion ring (38) to move, thereby causing the extrusion ring (38) to extrude the limiting ring (37) is also connected to the moving block (40).

8. A rock drilling device for tunnel excavation construction according to claim 7, characterized in that: The pushing member (42) includes a fixed block (43) fixedly connected to the connecting plate (25), a pushing rod (44) fixedly connected to the fixed block (43), an end of the pushing rod (44) fixedly connected to a third inclined block (45), a fourth inclined block (46) slidably fitted on the oblique side of the third inclined block (45), and the fourth inclined block (46) fixedly connected to the moving block (40).

9. A rock drilling device for tunnel excavation construction according to claim 8, characterized in that: The elastic member (41) includes a fixing seat (47) fixedly connected to the fixing sleeve (4), the fixing seat (47) is slidably connected to the connecting rod (39), and a tension spring (48) sleeved on the outer side of the connecting rod (39) is fixedly connected to the fixing seat (47), and the end of the tension spring (48) is fixedly connected to the moving block (40).

10. A rock drilling device for tunnel excavation construction according to claim 9, characterized in that: A handle (49) is fixedly connected to the fixing sleeve (4), and an anti-slip sleeve is provided on the handle (49).

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