Anchor rod hole reaming device and anchor rod trolley

Abstract

The utility model discloses an anchor rod hole reaming device and an anchor rod trolley, and belongs to the technical field of characteristic equipment.The anchor rod hole reaming device comprises a propelling beam, a drill rod and a reaming assembly, the drill rod is arranged in the propelling direction of the propelling beam, the reaming assembly is detachably arranged on the drill rod in a sleeved mode, and the reaming assembly is arranged on the propelling beam. The drill rod is used for drilling an anchor rod hole in the tunnel wall, and the hole expanding assembly is used for expanding a hole opening of the anchor rod hole. The drill rod lifter assembly is arranged on the propelling beam, and the drill rod lifter assembly is used for limiting a drill rod; and the top block assembly is arranged at the front end of the propelling beam, and the top block assembly is used for being attached to the tunnel wall in a grabbing mode. The technical problems that when the anchor rod is in butt joint with the anchor rod hole, supporting of the anchor rod is not enough, the positioning precision is not high enough, the allowable error between the end of the anchor rod and the center of the anchor rod hole is too small, a leading-in effect is not provided for the anchor rod, the center of the end of the anchor rod does not correspond to the center of the hole, and even the anchor rod cannot be pushed can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of special equipment, in particular to an anchor hole expansion device. In addition, the utility model also relates to an anchor trolley comprising the anchor hole expansion device. Background Art

[0002] Bolting is a reinforcement support method widely used in drilling and blasting mining and tunnel construction. When the bolt unit of the bolt trolley is performing bolting support operations, it is necessary to perform bolt installation operations after completing drilling and grouting to dock the bolt with the bolt hole. During the process of docking the bolt with the bolt hole by the bolt pusher, if the bolt unit rod adding mechanism and the clamping bracket do not accurately position the bolt, or the bolt unit is misaligned with the tunnel wall, the center of the bolt end head will not correspond to the center of the hole. In severe cases, the bolt will hit the edge of the hole and cannot be pushed forward. It needs to be readjusted and repeated operations, which seriously reduces the construction efficiency and increases the safety risks of the operators.

[0003] For example, a Chinese patent with patent publication number CN 214577107 U discloses an anchor trolley and an anchor unit thereof. The anchor unit includes a propulsion beam, an anchor propeller, a rock drill, an anchor warehouse and a grouting pipe. During the movement, the drill rod reaching the anchor hole station can be supported by the front end supporter and the middle supporter arranged on the propulsion beam to ensure smooth drilling.

[0004] The anchor unit in the prior art is mainly composed of an anchor library, a rock drill, an anchor pusher, an anchor manipulator, a grouting system, a pusher beam, an intermediate drill support, a front drill support, a hydraulic pipeline support, etc. After the anchor unit completes drilling and grouting, the anchor pusher is required to achieve docking between the anchor and the anchor hole.

[0005] The prior art has the following problems: During the docking process between the anchor rod and the anchor rod hole, due to the limitations of the equipment structure and the surface quality of the tunnel wall, the anchor rod can only be clamped by the middle drill support and the front drill support and the front rubber support can only grasp the tunnel wall. It is impossible to provide a sufficiently high positioning accuracy for the anchor rod, and it is even more impossible to increase the allowable error between the anchor rod end and the anchor rod hole center (the hole opening of the tunnel wall also has no guide angle design, which cannot play a guiding role for the anchor rod). In actual engineering, the center of the anchor rod end will not correspond to the center of the hole. In severe cases, the anchor rod will hit the edge of the hole opening and cannot be pushed forward, affecting construction efficiency and increasing safety hazards. Utility Model Content

[0006] The utility model provides an anchor hole enlarging device to solve the technical problems that when the anchor is connected to the anchor hole, the anchor support is insufficient and the positioning accuracy is not high enough, the allowable error between the anchor end and the anchor hole center is too small, and there is no guiding effect for the anchor, which easily leads to the center of the anchor end not corresponding to the center of the hole or even the inability to advance the anchor.

[0007] At the same time, the utility model also provides an anchor trolley including the above-mentioned anchor hole expanding device.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] An anchor hole expansion device comprises a propulsion beam, and the anchor hole expansion device further comprises:

[0010] A drill rod and a hole reaming assembly, wherein the drill rod is arranged along the advancing direction of the advancing beam, the hole reaming assembly is detachably sleeved on the drill rod, the drill rod is used to drill an anchor hole on the tunnel wall, and the hole reaming assembly is used to expand the opening of the anchor hole;

[0011] A drill support assembly, the drill support assembly is arranged on the propulsion beam, and the drill support assembly is used to limit the drill rod;

[0012] A top block assembly is installed at the front end of the propulsion beam, and the top block assembly is used to fit and grasp on the tunnel wall.

[0013] Furthermore, the reaming assembly includes a reaming drill bit, a clamping piece and a locking nut. The tail end of the reaming drill bit is connected to the clamping piece. The reaming drill bit and the clamping piece are used to be sleeved on the drill rod. The cylindrical outer wall of the clamping piece can be contracted. The locking nut is threadedly connected to the outer peripheral wall of the reaming drill bit and / or the clamping piece. The locking nut is used to compress the cylindrical outer wall of the clamping piece to clamp the drill rod to lock the clamping piece.

[0014] Furthermore, the clamping member includes an annular tube, a first end of which is provided with a plurality of claw petals in an annular array, an end of the claw petals away from the annular tube being inclined radially outward, the locking nut being used to fit with the outer surfaces of the plurality of claw petals and compressing and closing each claw petal during the screwing process, and the second end of the annular tube being connected to the tail end of the reaming drill bit.

[0015] Furthermore, the reaming assembly includes a reaming drill bit and a sleeve assembly, the sleeve assembly includes two semicircular sleeves respectively connected to the rear ends of the reaming drill bit, the reaming drill bit is used to be sleeved on the drill rod, and the two semicircular sleeves are symmetrically arranged and used to be fastened to each other by bolts to be clamped and fixed on the drill rod.

[0016] Furthermore, the reaming assembly includes a reaming drill bit and a clamp assembly, the clamp assembly includes a clamp connected to the rear end of the reaming drill bit, the clamp and the reaming drill bit are used to be sleeved on the drill rod, and the clamp is used to lock and fix the reaming drill bit on the drill rod.

[0017] Furthermore, a conical cylindrical cutter head for expanding the hole and forming a lead-in angle is provided at the front end of the reaming drill bit.

[0018] Furthermore, the drill support assembly includes a base, a connecting seat, a first oil cylinder and a guide assembly, the base is used to be fixedly connected to the propulsion beam, the connecting seat is hinged to the base, the first end of the first oil cylinder is hinged to the base, the second end of the first oil cylinder is hinged to the connecting seat, the first oil cylinder is used to drive the connecting seat to swing relative to the base, the guide assembly is arranged on the connecting seat, and the guide assembly is used to limit the drill rod and guide the drill rod.

[0019] Furthermore, the guide assembly includes a second oil cylinder, a guide member fixedly connected to the connecting seat, and a movable member movably connected to the connecting seat, the guide member and the movable member are both provided with grooves for guiding the drill rod, the guide member and the grooves on the movable member can be combined to form a guide hole, the guide hole is used to limit the drill rod, the first end of the second oil cylinder is hinged to the connecting seat, the second end of the second oil cylinder is hinged to the movable member, the second oil cylinder is used to drive the movable member to move and combine the movable member and the guide member to form the guide hole.

[0020] Furthermore, the top block assembly includes a bracket and a top block, the top block is used to be installed at the front end of the propulsion beam, the bracket is fixed to the front end of the top block, and the front end of the bracket is provided with a serrated piece for fitting and grasping on the tunnel wall.

[0021] According to another aspect of the utility model, an anchor trolley is also provided, which includes the above-mentioned anchor hole expanding device.

[0022] The utility model has the following beneficial effects:

[0023] The utility model limits the position of the drill rod through the drill support assembly, and can limit the drill rod to prevent the drill rod from excessive deviation, and then grasps and attaches to the tunnel wall through the top block assembly to play a reinforcing and fixing role, thereby improving the overall positioning accuracy of the device; finally, the hole opening on the tunnel wall is enlarged by the hole expansion assembly, the allowable error between the anchor rod end and the anchor rod hole center is increased, a guiding effect is provided for the anchor rod, and it is ensured that the center of the anchor rod end and the hole center do not deviate greatly, thereby avoiding the situation that the anchor rod cannot be advanced.

[0024] The anchor trolley of the utility model also has the above-mentioned beneficial effects.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described above at the same time. In addition to the purposes, features and advantages described above, the present invention also has other purposes, features and advantages. The present invention will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the hole expansion device of the preferred embodiment of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the hole expansion assembly of the preferred embodiment of the utility model.

[0029] Figure 3 It is a structural schematic diagram of a drill bit assembly according to a preferred embodiment of the utility model.

[0030] Figure 4 It is a schematic diagram of the cooperation between the drill bit assembly and the locking nut according to the preferred embodiment of the utility model.

[0031] Figure 5 It is a schematic diagram of the drill bit assembly after the locking nut is removed according to the preferred embodiment of the utility model.

[0032] Figure 6 It is a structural schematic diagram of a pressing member of a preferred embodiment of the utility model.

[0033] Figure 7 It is a structural schematic diagram of a drill support assembly according to a preferred embodiment of the utility model.

[0034] Figure 8 It is a structural schematic diagram of a top block assembly of a preferred embodiment of the utility model.

[0035] Legend: 1. Drill rod; 2. Hole expansion assembly; 3. Drill support assembly; 4. Ejector block assembly; 10. Push beam; 21. Locking nut; 22. Drill bit assembly; 221. Hole expansion drill bit; 222. Sleeve; 23. Pressing member; 31. Base; 32. First oil cylinder; 33. Connecting seat; 34. Connecting plate; 35. Guide member; 36. Movable member; 37. Latch; 38. Second oil cylinder; 41. Bracket; 42. Ejector block. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0037] Please refer to the attached drawing, which is a structural schematic diagram of a preferred embodiment of an anchor hole expansion device and an anchor trolley provided by the utility model.

[0038] An anchor hole expansion device, the anchor hole expansion device comprises a propulsion beam 10, and the anchor hole expansion device further comprises:

[0039] A drill rod 1 and a hole reaming assembly 2, wherein the drill rod 1 is arranged along the advancing direction of the advancing beam 10, and the hole reaming assembly 2 is detachably sleeved on the drill rod 1, the drill rod 1 is used to drill an anchor hole on the tunnel wall, and the hole reaming assembly 2 is used to expand the opening of the anchor hole;

[0040] A drill support assembly 3, wherein the drill support assembly 3 is arranged on the propulsion beam 10 and is used to limit the drill rod 1;

[0041] A top block assembly 4 is mounted on the front end of the propulsion beam 10, and the top block assembly 4 is used to fit and grasp onto the tunnel wall.

[0042] The utility model limits the drill rod 1 through the drill support assembly 3, and can limit the drill rod 1 to prevent the drill rod 1 from being excessively offset, and then grasps and attaches to the tunnel wall through the top block assembly 4 to play a reinforcing and fixing role, thereby improving the overall positioning accuracy of the device; finally, the hole opening on the tunnel wall is enlarged through the hole expansion assembly 2, increasing the allowable error between the anchor rod end and the anchor rod hole center, providing a guiding effect for the anchor rod, ensuring that the center of the anchor rod end and the hole center do not deviate significantly, and avoiding the situation where the anchor rod cannot be advanced.

[0043] Preferably, please refer to Figure 1-6 As shown, the reaming assembly 2 includes a reaming drill bit 221, a clamping piece 23 and a locking nut 21. The rear end of the reaming drill bit 221 is connected to the clamping piece 23. The reaming drill bit 221 and the clamping piece 23 are used to be sleeved on the drill rod 1. The cylindrical outer wall of the clamping piece 23 can be contracted. The locking nut 21 is threadedly connected to the outer peripheral wall of the reaming drill bit 221 and / or the clamping piece 23. The locking nut 21 is used to compress the cylindrical outer wall of the clamping piece 23 to clamp the drill rod 1 to lock the clamping piece 23.

[0044] It can be understood that the reaming drill bit 221 and the clamping piece 23 are sleeved on the drill rod 1 and can be slidably adjusted in position, and the cylindrical outer wall of the clamping piece 23 can be contracted, that is, the cylindrical outer wall of the clamping piece 23 can be compressed close to the surface of the drill rod 1 through the locking nut 21, thereby locking the clamping piece 23 and the reaming drill bit 221 on the drill rod 1, and the adjustment is very simple.

[0045] Preferably, please refer to Figure 6As shown, the clamping member 23 includes an annular tube, and a plurality of claw petals are arranged in an annular array at the first end of the annular tube. The end of the claw petals away from the annular tube is inclined radially outward, and the locking nut 21 is used to fit with the outer surfaces of the plurality of claw petals and compress and close each claw petal during the screwing process. The second end of the annular tube is connected to the tail end of the reaming drill bit 221.

[0046] It can be understood that the inclined claws of the clamping member 23 can be retracted, and the clamping member 23 can be locked on the drill rod 1 by compressing and retracting the claws through the locking nut 21, so as to facilitate the adjustment of the position of the clamping member 23 and the reaming drill bit 221.

[0047] It should be noted that a sleeve 222 can be welded to the tail end of the reaming drill bit 221 to form a drill bit assembly 22, and the clamping member 23 is arranged in the sleeve 222 so that the claw petal part is exposed outside the sleeve 222, and the locking nut 21 is threadedly matched with the reaming drill bit 221 or the sleeve 222, and the clamping member 23 can be locked by rotating the locking nut 21 to compress and close the claw petal. In this way, the clamping member 23 and the reaming drill bit 221 are separated and arranged, which can facilitate the maintenance and replacement of the clamping member 23.

[0048] In another preferred embodiment of the utility model, the reaming assembly 2 includes a reaming drill bit 221 and a sleeve assembly, the sleeve assembly includes two semicircular sleeves respectively connected to the tail ends of the reaming drill bit 221, the reaming drill bit 221 is used to be sleeved on the drill rod 1, and the two semicircular sleeves are symmetrically arranged and used to be fastened to each other by bolts to be clamped and fixed on the drill rod 1.

[0049] It is understandable that the position fixation of the reamer drill bit 221 and the semicircular sleeve can be achieved by locking the semicircular sleeve on the drill rod 1 through bolts. A rubber pad or the like can be arranged in the semicircular sleeve to increase friction and provide buffer protection.

[0050] In another preferred embodiment of the utility model, the reaming assembly 2 includes a reaming drill bit 221 and a clamp assembly, the clamp assembly includes a clamp connected to the tail end of the reaming drill bit 221, the clamp and the reaming drill bit 221 are used to be sleeved on the drill rod 1, and the clamp is used to lock and fix the reaming drill bit 221 on the drill rod 1.

[0051] It is understandable that the reamer drill bit 221 can be conveniently fixed to the drill rod 1 and the position can be adjusted by the clamp. A rubber pad can also be arranged on the inner surface of the clamp to increase the friction and provide buffer protection.

[0052] Preferably, please refer to Figure 4 and Figure 5 As shown, the front end of the reaming drill bit 221 is provided with a conical cylindrical cutter head for reaming and forming a lead-in angle.

[0053] It is understandable that the conical barrel cutter head at the front end of the reaming drill bit 221 can form an introduction angle while reaming at the hole opening of the tunnel wall, thereby realizing the introduction function of the hole opening. The cutter head of the reaming drill bit 221 can be provided with a guide strip groove structure to improve the smoothness of reaming.

[0054] Preferably, please refer to Figure 1 and Figure 7 As shown, the drill support assembly 3 includes a base 31, a connecting seat 33, a first oil cylinder 32 and a guide assembly, the base 31 is used to be fixedly connected to the propulsion beam 10, the connecting seat 33 is hinged on the base 31, the first end of the first oil cylinder 32 is hinged to the base 31, the second end of the first oil cylinder 32 is hinged to the connecting seat 33, the first oil cylinder 32 is used to drive the connecting seat 33 to swing relative to the base 31, the guide assembly is arranged on the connecting seat 33, and the guide assembly is used to limit the drill rod 1 and guide the drill rod 1.

[0055] It is understandable that the base 31 plays a fixed supporting role. The base 31 can be installed on the side of the propulsion beam 10. The first oil cylinder 32 drives the connecting seat 33 to swing to adjust the position of the drill rod 1, thereby achieving more precise positioning control.

[0056] Preferably, please refer to Figure 7 As shown, the guide assembly includes a second oil cylinder 38, a guide member 35 fixedly connected to the connecting seat 33, and a movable member 36 movably connected to the connecting seat 33, the guide member 35 and the movable member 36 are both provided with grooves for guiding the drill rod 1, the grooves on the guide member 35 and the movable member 36 can be combined to form a guide hole, the guide hole is used to limit the drill rod 1, the first end of the second oil cylinder 38 is hinged to the connecting seat 33, the second end of the second oil cylinder 38 is hinged to the movable member 36, the second oil cylinder 38 is used to drive the movable member 36 to move and combine the movable member 36 with the guide member 35 to form the guide hole.

[0057] It can be understood that the second oil cylinder 38 drives the movable member 36 to approach the guide member 35 to form a guide hole so that the center of the guide hole is concentric with the drill rod 1, which plays a role in limiting and calibrating the drill rod 1 to prevent the drill rod 1 from being greatly offset; and the second oil cylinder 38 drives the movable member 36 away from the guide member 35 to open the guide hole, which is convenient for the expansion assembly 2 to pass through. In addition, the size of the grooves on the guide member 35 and the movable member 36 can be changed to form a guide hole with a smaller aperture to play a certain supporting and guiding role on the drill rod 1, thereby improving the positioning accuracy and stability of the drill rod 1.

[0058] It should be noted that the connection seat 33 can be formed by two parallel support plates, and the guide member 35, the movable member 36 and the second oil cylinder 38 can be arranged between the two support plates to facilitate the movement of the movable member 36 and reduce the overall weight of the connection seat 33. The connection plate 34 can be used to strengthen the fixation between the two support plates.

[0059] In addition, the guide member 35 can be connected to the connection seat 33 by bolts, which is convenient for disassembly and position adjustment of the guide member 35. Both the guide member 35 and the movable member 36 can adopt a plate-like structure, and the movable member 36 can be hinged to the connection seat 33 through the mounting hole in the middle part. A groove is provided at the first end of the movable member 36, and the second end of the movable member 36 can be pushed by the second oil cylinder 38 to drive the first end of the movable member 36 to swing.

[0060] When the reaming assembly 2 needs to pass through the drill support assembly 3, the second oil cylinder 38 drives the movable part 36 away from the guide part 35 to open the guide hole, and the first oil cylinder 32 drives the connecting seat 33 to swing and then adjust the position of the guide part 35, so that the distance between the guide part 35 and the movable part 36 is enlarged to provide a larger space for the reaming assembly 2 to pass through, avoiding interference with the components of the drill support assembly 3.

[0061] Preferably, please refer to Figure 1 and Figure 8 As shown, the top block assembly 4 includes a bracket 41 and a top block 42. The top block 42 is used to be installed at the front end of the propulsion beam 10. The bracket 41 is fixed to the front end of the top block 42. The front end of the bracket 41 is provided with a serrated piece for fitting and grasping on the tunnel wall.

[0062] It is understandable that the bracket 41 can increase the gripping force on the tunnel wall through the sawtooth, reduce or avoid the relative sliding between the anchor unit and the tunnel wall, and improve the accuracy of the anchor to the hole. The sawtooth can be staggered to increase the friction with the tunnel wall, and the sawtooth can be set at different heights to form a wavy shape as a whole. The setting of the sawtooth can take into account both the flat and curved tunnel walls, increase the adhesion to ensure reliable adhesion, and increase the positioning accuracy of the anchor unit.

[0063] According to another aspect of the utility model, an anchor trolley is also provided, which includes the above-mentioned anchor hole expanding device.

[0064] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0065] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection of the utility model.

Claims

1. An anchor hole expansion device, comprising a propulsion beam (10), characterized in that: The anchor hole expansion device also includes: A drill rod (1) and a hole enlarging assembly (2), wherein the drill rod (1) is arranged along the advancing direction of the advancing beam (10), and the hole enlarging assembly (2) is detachably sleeved on the drill rod (1), the drill rod (1) is used to drill an anchor hole on a tunnel wall, and the hole enlarging assembly (2) is used to enlarge the opening of the anchor hole; A drill support assembly (3), the drill support assembly (3) being arranged on the propulsion beam (10), and the drill support assembly (3) being used to limit the position of the drill rod (1); A top block assembly (4) is mounted on the front end of the propulsion beam (10), and the top block assembly (4) is used to fit and grip onto a tunnel wall.

2. The anchor hole expansion device according to claim 1, characterized in that: The reaming assembly (2) comprises a reaming drill bit (221), a clamping piece (23) and a locking nut (21); the rear end of the reaming drill bit (221) is connected to the clamping piece (23); the reaming drill bit (221) and the clamping piece (23) are used to be sleeved on the drill rod (1); the cylindrical outer wall of the clamping piece (23) can be shrunk; the locking nut (21) is threadedly connected to the outer peripheral wall of the reaming drill bit (221) and / or the clamping piece (23); the locking nut (21) is used to compress the cylindrical outer wall of the clamping piece (23) to clamp the drill rod (1) so as to lock the clamping piece (23).

3. The anchor hole expansion device according to claim 2, characterized in that: The clamping member (23) comprises an annular tube, a first end of which is provided with a plurality of claw petals in an annular array, an end of the claw petals away from the annular tube being inclined radially outward, the locking nut (21) being used to fit with the outer surfaces of the plurality of claw petals and compress and close each claw petal during the screwing process, and the second end of the annular tube being connected to the rear end of the reaming drill bit (221).

4. The anchor hole expansion device according to claim 1, characterized in that: The reaming assembly (2) comprises a reaming drill bit (221) and a sleeve assembly, wherein the sleeve assembly comprises two semicircular sleeves respectively connected to the rear ends of the reaming drill bit (221), the reaming drill bit (221) is used to be sleeved on the drill rod (1), and the two semicircular sleeves are symmetrically arranged and are used to be fastened to each other by bolts so as to be clamped and fixed on the drill rod (1).

5. The anchor hole expansion device according to claim 1, characterized in that: The reaming assembly (2) comprises a reaming drill bit (221) and a clamp assembly, wherein the clamp assembly comprises a clamp connected to the rear end of the reaming drill bit (221), the clamp and the reaming drill bit (221) are used to be sleeved on the drill rod (1), and the clamp is used to lock and fix the reaming drill bit (221) on the drill rod (1).

6. An anchor hole expansion device according to any one of claims 2 to 5, characterized in that: The front end of the reaming drill bit (221) is provided with a conical cylindrical cutter head for reaming the hole and forming an introduction angle.

7. The anchor hole expansion device according to claim 1, characterized in that: The drill support assembly (3) comprises a base (31), a connecting seat (33), a first oil cylinder (32) and a guide assembly, wherein the base (31) is used for being fixedly connected to the propulsion beam (10), the connecting seat (33) is hinged on the base (31), a first end of the first oil cylinder (32) is hinged on the base (31), a second end of the first oil cylinder (32) is hinged on the connecting seat (33), the first oil cylinder (32) is used for driving the connecting seat (33) to swing relative to the base (31), and the guide assembly is arranged on the connecting seat (33), and the guide assembly is used for limiting the position of the drill rod (1) and guiding the drill rod (1).

8. The anchor hole expansion device according to claim 7, characterized in that: The guide assembly comprises a second oil cylinder (38), a guide member (35) fixedly connected to the connecting seat (33), and a movable member (36) movably connected to the connecting seat (33); the guide member (35) and the movable member (36) are both provided with grooves for guiding the drill rod (1); the grooves on the guide member (35) and the movable member (36) can be combined to form a guide hole; the guide hole is used to limit the drill rod (1); the first end of the second oil cylinder (38) is hinged to the connecting seat (33); the second end of the second oil cylinder (38) is hinged to the movable member (36); the second oil cylinder (38) is used to drive the movable member (36) to move and combine the movable member (36) with the guide member (35) to form the guide hole.

9. The anchor hole expansion device according to claim 1, characterized in that: The top block assembly (4) comprises a bracket (41) and a top block (42), wherein the top block (42) is used to be mounted on the front end of the propulsion beam (10), the bracket (41) is fixed to the front end of the top block (42), and the front end of the bracket (41) is provided with a sawtooth piece for fitting and grasping on a tunnel wall.

10. An anchor trolley, characterized in that: It comprises the anchor hole expanding device as described in any one of claims 1-9.

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