A guide anti-deviation device suitable for an open TBM anchor rod drilling rig trolley

CN117868874BActive Publication Date: 2026-10-16CHINA HARBOUR ENGINEERING
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Patent Information

Application Number
CN202410072011.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-18
Publication Date
2026-10-16
Estimated Expiration
2044-01-18

AI Technical Summary

Technical Problem

[0003]但是现有技术中,现有锚杆钻机实际使用过程中多对固定位置进行钻孔,但是在实际施工过程中,由于实际施工环境影响,进而容易导致现有锚杆钻机使用位置发生偏移,进而导致现有锚杆钻机无法精准便捷进行指定位置的钻孔处理,进而导致设备实际使用效果欠佳

Benefits of technology

[0017]In this invention, existing anchor drilling machines of different specifications are securely connected to the extension frame using mounting bolts. The ring beam is then securely positioned at the designated location using a fixing frame. The adjusting worm gear is rotated and adjusted, which, in conjunction with the adjusting worm wheel, effectively drives the rotating tube to rotate. This allows the rotating tube to effectively move the adjusting threaded rod within the positional constraints of the adjusting block. The adjusting block, via the positioning bolt, can then effectively move the adjusting shaft, facilitating convenient adjustment of the limit wheel's position. This ensures the limit wheel tightly fits against the inner wall of the limit groove near the support wheel. Simultaneously, the support wheel, in conjunction with the second functional mechanism, securely connects to the ring beam, effectively controlling and adjusting the actual drilling accuracy, reducing drilling difficulty, and improving the equipment's performance. Finally, based on actual usage needs, the drive motor is activated by controlling the start of the machine. The drive motor effectively drives the drive worm to rotate via the second bevel gear. The rotating drive worm, in conjunction with the rotating worm wheel, effectively drives the connecting gear to rotate. This, in turn, drives the drive gear to rotate. Under the positional constraint of the ring beam, the rotating drive gear can effectively move and adjust the position of the second functional mechanism, allowing the existing anchor drilling rig to reach the designated position. Then, by controlling the start of the swing arm motor, the swing arm motor drives the connecting shaft to rotate. This rotating connecting shaft, in conjunction with the first bevel gear, effectively drives the swing arm worm to rotate. The swing arm worm, in conjunction with the swing arm worm wheel, can effectively adjust the operating angle of the rotating frame. This, in turn, allows the rotating frame, in conjunction with the extension frame, to effectively adjust the operating angle of the existing anchor drilling rig, enabling the equipment to perform drilling at the designated position and efficiently realize its intended functions.

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Abstract

The application discloses a guiding and anti-deviation device suitable for an open TBM anchor rod drilling machine trolley, which comprises a first function mechanism, the first function mechanism comprises annular beams, and two annular beams are arranged in total, and a limiting groove is formed in the outer surface of each annular beam. In the application, the existing anchor rod drilling machines with different specifications are stably connected with the extension frame through mounting bolts, the annular beams are stably arranged at the designated use positions through the fixing frame, the adjusting worm is adjusted through rotation, the adjusting worm cooperates with the adjusting worm gear to effectively drive the rotating pipe to rotate, the rotating pipe can effectively move the adjusting threaded rod use position under the position limitation of the adjusting block, the adjusting block can effectively move the adjusting shaft use position through the positioning bolt, the use position of the limiting wheel can be conveniently adjusted, and the limiting wheel can be closely attached to the inner wall of the limiting groove on the side of the supporting wheel.
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Description

Technical Field

[0001] This invention belongs to the technical field of tunneling machine equipment, specifically a guide and anti-deviation device suitable for open-type TBM anchor drilling rig trolley. Background Technology

[0002] TBM is a type of tunnel boring machine, a comprehensive piece of equipment that uses mechanical methods to break rocks, remove muck, and provide support for continuous operations. Based on the cutting process at the working face, TBMs are classified into full-face tunnel boring machines (TBMs) and partial-face TBMs.

[0003] However, in the existing technology, existing anchor drilling machines are mostly used to drill holes at fixed positions. However, due to the influence of the actual construction environment, the position of the existing anchor drilling machine is easily deviated, which makes it impossible for the existing anchor drilling machine to accurately and conveniently drill holes at the specified positions, resulting in poor actual use effect of the equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a guide and anti-deviation device for an open-type TBM anchor drilling rig trolley that allows for convenient adjustment of the usage position, improves the accuracy of actual use, effectively avoids the influence of the usage environment on the equipment, and enables the equipment to efficiently perform its intended functions.

[0005] The technical solution adopted in this invention is as follows: A guide and anti-deviation device suitable for an open-type TBM anchor drilling rig trolley, comprising: a first functional mechanism, the first functional mechanism including two annular beams, each annular beam having a limit groove formed on both outer surfaces; and

[0006] The second functional mechanism includes a movable frame and a movable component. The movable frame is slidably sleeved on the outer surface of the ring beam. A swing arm motor is fixedly connected to one outer surface of the movable frame, and a rotating frame is rotatably connected to the other outer surface of the movable frame. An extension frame is fixedly connected to one outer surface of the rotating frame, and a drive frame is fixedly connected to the outer surface of the movable frame. A drive gear is rotatably connected between the inner walls of the two sides of the drive frame and meshes with the ring beam. A connecting gear is rotatably connected to one inner wall of the drive frame and meshes with the drive gear. A drive worm gear is fixedly connected to one end of the connecting gear, and the movable component is disposed on the movable frame.

[0007] Each of the annular beams has two connecting plates fixedly connected to the inner walls on both sides. The two annular beams are fixedly connected by the connecting plates and bolts. Each annular beam has a fixed frame fixedly connected inside.

[0008] The extension frame has multiple mounting holes equidistantly spaced on its outer surfaces on both sides, and each of the mounting holes is threaded with a mounting bolt.

[0009] The movable frame has a swing arm worm gear rotatably connected to the inner wall of one side, and a first bevel gear is sleeved on the outer surface of the swing arm worm gear.

[0010] The outer surface of the rotating frame is fitted with a swing arm worm gear, which meshes with the swing arm worm.

[0011] The inner wall of one side of the mobile frame is rotatably connected to a connecting shaft, and the outer surface of the connecting shaft is also fitted with a first bevel gear. The two first bevel gears mesh, and one end of the connecting shaft is fixedly connected to the output end of the swing arm motor.

[0012] The inner wall of the other side of the drive frame is rotatably connected to a drive worm gear, which meshes with a drive worm wheel. A second bevel gear is sleeved on the outer surface of the drive worm gear.

[0013] The drive frame has a drive motor fixedly connected to one outer surface. The output end of the drive motor extends into the drive frame. The output end of the drive motor is also fitted with a second bevel gear, and the two second bevel gears mesh.

[0014] The movable component includes two plates, both of which are fixedly connected to the outer surface of the movable frame. Each plate has two support wheels rotatably connected to one side of its outer surface, and the outer surface of each support wheel is in contact with the outer surface of the ring beam.

[0015] Each of the aforementioned components has a movable opening on its other outer surface, a movable shaft slidably embedded inside each movable opening, a limiting wheel slidably fitted on the outer surface of each movable shaft, each limiting wheel extending into a corresponding limiting groove, and one side of the outer surface of each limiting wheel fitting against one side of the inner surface of the limiting groove. A sliding frame is fixedly connected to the other outer surface of each component, an adjusting block slidably embedded inside each sliding frame, a rotating tube rotatably connected to one side of the outer surface of each sliding frame, an adjusting worm gear fitted on the outer surface of each rotating tube, a movable threaded rod threadedly connected inside each rotating tube, one end of each movable threaded rod fixedly connected to one side of the outer surface of the corresponding adjusting block, a positioning bolt slidably penetrating one side of the outer surface of each adjusting block, each positioning bolt threadedly connected to one end of the corresponding movable shaft, and an adjusting worm gear rotatably connected to the other outer surface of each component, with each adjusting worm gear meshing with a corresponding adjusting worm gear.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] In this invention, existing anchor drilling machines of different specifications are securely connected to the extension frame using mounting bolts. The ring beam is then securely positioned at the designated location using a fixing frame. The adjusting worm gear is rotated and adjusted, which, in conjunction with the adjusting worm wheel, effectively drives the rotating tube to rotate. This allows the rotating tube to effectively move the adjusting threaded rod within the positional constraints of the adjusting block. The adjusting block, via the positioning bolt, can then effectively move the adjusting shaft, facilitating convenient adjustment of the limit wheel's position. This ensures the limit wheel tightly fits against the inner wall of the limit groove near the support wheel. Simultaneously, the support wheel, in conjunction with the second functional mechanism, securely connects to the ring beam, effectively controlling and adjusting the actual drilling accuracy, reducing drilling difficulty, and improving the equipment's performance. Finally, based on actual usage needs, the drive motor is activated by controlling the start of the machine. The drive motor effectively drives the drive worm to rotate via the second bevel gear. The rotating drive worm, in conjunction with the rotating worm wheel, effectively drives the connecting gear to rotate. This, in turn, drives the drive gear to rotate. Under the positional constraint of the ring beam, the rotating drive gear can effectively move and adjust the position of the second functional mechanism, allowing the existing anchor drilling rig to reach the designated position. Then, by controlling the start of the swing arm motor, the swing arm motor drives the connecting shaft to rotate. This rotating connecting shaft, in conjunction with the first bevel gear, effectively drives the swing arm worm to rotate. The swing arm worm, in conjunction with the swing arm worm wheel, can effectively adjust the operating angle of the rotating frame. This, in turn, allows the rotating frame, in conjunction with the extension frame, to effectively adjust the operating angle of the existing anchor drilling rig, enabling the equipment to perform drilling at the designated position and efficiently realize its intended functions. Attached Figure Description

[0018] Figure 1 This is a frontal perspective view of the present invention;

[0019] Figure 2 This is a rear perspective view of the present invention;

[0020] Figure 3 This is a frontal sectional perspective view of the present invention;

[0021] Figure 4 This is a front view of the unfolded perspective of the first functional mechanism of the present invention;

[0022] Figure 5 This is a frontal sectional view of the second functional mechanism of the present invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged view of section A in the middle;

[0024] Figure 7This is a side sectional view of the second functional mechanism of the present invention.

[0025] Figure 8 For the present invention Figure 7 Enlarged view of section B;

[0026] Figure 9 For the present invention Figure 7 Enlarged view of section C.

[0027] The diagram shows the following markings: 1. First functional mechanism; 101. Ring beam; 102. Connecting piece; 103. Limiting groove; 104. Fixing frame; 2. Second functional mechanism; 201. Moving frame; 202. Swing arm motor; 203. Rotating frame; 204. Swing arm worm gear; 205. Extension frame; 206. Mounting bolt; 207. Drive frame; 208. Drive motor; 209. Drive gear; 210. Linking gear; 211. Drive worm gear; 212. Plate; 213. Support wheel; 214. Moving shaft; 215. Limiting wheel; 216. Sliding frame; 217. Rotary tube; 218. Moving threaded rod; 219. Adjusting block; 220. Adjusting worm gear; 221. Positioning bolt. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] Example 1

[0030] Reference Figures 1-9A guide and anti-deviation device for an open-type TBM anchor drilling rig trolley includes: a first functional mechanism 1 and a second functional mechanism 2. The first functional mechanism 1 includes an annular beam 101, which provides installation positions for other functional components of the equipment and effectively restricts the movement of the second functional mechanism 2. Two annular beams 101 are provided, and each annular beam 101 has limit grooves 103 on both outer surfaces. The limit grooves 103 effectively restrict the movement of limit wheels 215. The second functional mechanism 2 includes a movable frame 201 and movable components. The movable frame 201 provides installation positions for other functional components of the equipment. The movable frame 201 is slidably fitted onto the outer surface of the annular beam 101. A swing arm motor 202 is fixedly connected to one outer surface of the movable frame 201, providing the power required for the rotation of the rotating frame 203. The rotating frame 203 is rotatably connected to the other outer surface of the movable frame 201, facilitating the installation of other functional components of the equipment and simultaneously restricting the movement of the second functional mechanism 2. The extension frame 205 can be effectively adjusted to adjust its operating angle. The extension frame 205 is fixedly connected to one outer surface of the rotating frame 203. The extension frame 205 facilitates the installation and setup of existing anchor drilling rigs. A drive frame 207 is fixedly connected to the outer surface of the movable frame 201. The drive frame 207 facilitates the installation and setup of other functional components of the equipment. Drive gears 209 are rotatably connected between the inner surfaces of both sides of the drive frame 207. The drive gears 209 enable the drive motor 208 to effectively move and adjust the second functional mechanism 2. In use, the drive gear 209 meshes with the ring beam 101. A connecting gear 210 is rotatably connected to the inner wall of one side of the drive frame 207. The setting of the connecting gear 210 facilitates the drive motor 208 to drive the drive gear 209 to rotate. The connecting gear 210 meshes with the drive gear 209. A drive worm gear is fixedly connected to one end of the connecting gear 210. The setting of the drive worm gear, together with the drive worm 211, enables the drive motor 208 to effectively drive the connecting gear 210 to rotate. The moving parts are set on the moving frame 201.

[0031] Reference Figures 3-9Two connecting pieces 102 are fixedly connected to the inner walls of both sides of each annular beam 101. The connecting pieces 102 facilitate the installation of other functional components of the equipment. The two annular beams 101 are fixedly connected by the connecting pieces 102 and bolts. A fixing frame 104 is fixedly connected inside each annular beam 101. The fixing frame 104 facilitates the installation of the annular beam 101. Multiple mounting holes are equidistantly opened on the outer surfaces of both sides of the extension frame 205. The mounting holes facilitate the installation of mounting bolts 206. At the same time, the mounting bolts 206 can fix and restrict the position of the existing anchor drilling machine. The mounting bolts 206 are threaded into the multiple mounting holes. A swing arm worm gear 204 is rotatably connected to the inner wall of one side of the moving frame 201. The worm gear 204, in conjunction with the worm wheel, enables the connecting shaft to effectively drive the rotating frame 203 to rotate. A first bevel gear is fitted on the outer surface of the worm gear 204, and a worm wheel is fitted on the outer surface of the rotating frame 203. The worm wheel and worm gear 204 mesh. A connecting shaft is rotatably connected to the inner wall of one side of the moving frame 201. A first bevel gear is also fitted on the outer surface of the connecting shaft, and the two first bevel gears mesh. One end of the connecting shaft is fixedly connected to the output end of the worm motor 202. A drive worm 211 is rotatably connected to the inner wall of the other side of the drive frame 207. The drive worm 211 meshes with the drive wheel. A second bevel gear is fitted on the outer surface of the drive worm 211. A drive motor 208 is fixedly connected to the outer surface of one side of the drive frame 207. The installation of 208 provides the power required for the rotation of the drive gear 209. The output end of the drive motor 208 extends into the drive frame 207. The output end of the drive motor 208 is also fitted with a second bevel gear. The two second bevel gears mesh. The moving parts include a mounting plate 212. The installation of the mounting plate 212 facilitates the installation of other functional components of the equipment. There are two mounting plates 212. Both mounting plates 212 are fixedly connected to the outer surface of the moving frame 201. Two support wheels 213 are rotatably connected to one side of the outer surface of each mounting plate 212. The installation of the support wheels 213, together with the limiting wheel 215, can effectively stabilize the working position of the second functional mechanism 2, so that the second functional mechanism 2 and the first functional mechanism 1 can be stably connected. The outer surface of each support wheel 213 and the ring The outer surface of the beam 101 is fitted together, and each plate 212 has a movable opening on its other outer surface. The movable opening facilitates the installation of the movable shaft 214. The movable shaft 214 is slidably embedded inside each movable opening. The movable shaft 214 facilitates the installation of the limiting wheel 215 and can effectively move and adjust the position of the limiting wheel 215. The outer surface of each movable shaft 214 is slidably fitted with the limiting wheel 215. Each limiting wheel 215 extends into the corresponding limiting groove 103, and one outer surface of each limiting wheel 215 is fitted with one inner surface of the limiting groove 103. A sliding frame 216 is fixedly connected to the other outer surface of each plate 212. The sliding frame 216 facilitates the installation of other functional components of the equipment.Simultaneously, it can effectively limit the position of the adjusting block 219, thereby enabling the equipment to perform its intended functions. Each slide frame 216 has an adjusting block 219 slidably embedded inside. The setting of the adjusting block 219, together with the positioning bolt 221, can effectively move and adjust the position of the moving shaft 214. A rotating tube 217 is rotatably connected to one side of the outer surface of each slide frame 216. The setting of the rotating tube 217 facilitates the position adjustment of the moving threaded rod 218. An adjusting worm gear is sleeved on the outer surface of each rotating tube 217. The setting of the adjusting worm gear, together with the adjusting worm 220, facilitates the rotation of the tube 218. The rotation adjustment of 7 is achieved by threading a movable threaded rod 218 inside each rotating tube 217. The movable threaded rod 218 effectively moves the position of the adjusting block 219. One end of each movable threaded rod 218 is fixedly connected to one side of the outer surface of the corresponding adjusting block 219. A positioning bolt 221 slides through one side of the outer surface of each adjusting block 219. Each positioning bolt 221 is threaded to one end of the corresponding moving shaft 214. An adjusting worm 220 is rotatably connected to the other side of the outer surface of each plate 212, and each adjusting worm 220 meshes with a corresponding adjusting worm wheel.

[0032] In use, existing anchor drilling machines of different specifications are securely connected to the extension frame 205 using mounting bolts 206. The ring beam 101 is securely set in the designated position using the fixing frame 104. Then, by rotating and adjusting the adjusting worm 220, the adjusting worm 220, in conjunction with the adjusting worm wheel, can effectively drive the rotating tube 217 to rotate. This allows the rotating tube 217 to effectively move the adjusting threaded rod 218 to the position under the position restriction of the adjusting block 219. Consequently, the adjusting block 219 can effectively move the adjusting shaft 214 to the position using the positioning bolt 221, thus facilitating the adjustment of the position of the limiting wheel 215. This ensures that the limiting wheel 215 fits tightly against the inner wall of the limiting groove 103 near the support wheel 213. Simultaneously, in conjunction with the support wheel 213, the second functional mechanism 2 can be securely connected to the ring beam 101, thereby effectively controlling and adjusting the actual drilling accuracy, effectively reducing the actual drilling difficulty, and effectively improving the actual use effect of the equipment. Finally, according to the actual use requirements, the drive motor can be started by controlling the start. 208, thereby enabling the drive motor 208 to effectively drive the drive worm 211 to rotate via the second bevel gear, so that the rotating drive worm 211, in conjunction with the rotating worm wheel, can effectively drive the connecting gear 210 to rotate, and so that the rotating connecting gear 210 can drive the drive gear 209 to rotate. Under the position constraint of the ring beam 101, the rotating drive gear 209 can effectively move and adjust the position of the second functional mechanism 2, thereby enabling the existing anchor drilling machine to effectively reach the designated position. Then, by controlling the start of the swing arm motor 202, the swing arm motor 202 can drive the connecting shaft to rotate, so that the rotating connecting shaft can effectively drive the swing arm worm 204 to rotate via the first bevel gear, thereby enabling the swing arm worm 204, in conjunction with the swing arm worm wheel, to effectively adjust the operating angle of the rotating frame 203, and so that the rotating frame 203, in conjunction with the extension frame 205, can effectively adjust the operating angle of the existing anchor drilling machine, thereby enabling the equipment to perform drilling at the designated position and enabling the equipment to efficiently realize its intended functions.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A guide and anti-deviation device suitable for an open-type TBM anchor drilling rig trolley, characterized in that, include: The first functional mechanism (1) includes two annular beams (101), each annular beam (101) having a limiting groove (103) on both outer surfaces; and The second functional mechanism (2) includes a movable frame (201) and a movable component. The movable frame (201) is slidably sleeved on the outer surface of the ring beam (101). A swing arm motor (202) is fixedly connected to one outer surface of the movable frame (201), and a rotating frame (203) is rotatably connected to the other outer surface of the movable frame (201). An extension frame (205) is fixedly connected to one outer surface of the rotating frame (203). A drive frame (207) is fixedly connected to the outer surface of the movable frame (201). A drive gear (209) is rotatably connected between the inner surfaces of the two sides of the drive frame (207). 9) meshes with the ring beam (101), and a connecting gear (210) is rotatably connected to the inner surface wall of one side of the drive frame (207). The connecting gear (210) meshes with the drive gear (209). A drive worm gear is fixedly connected to one end of the connecting gear (210). The moving part is set on the moving frame (201). The moving part includes a plate (212). There are two plates (212). Both plates (212) are fixedly connected to the outer surface of the moving frame (201). Two support wheels (213) are rotatably connected to one side of the outer surface of each plate (212). The outer surface of each support wheel (213) and the ring beam (101) are connected to the ring beam (101). 101) The outer surfaces are fitted together. Each of the two outer surfaces of the patch (212) has a movable opening. A movable shaft (214) is slidably embedded inside each movable opening. A limiting wheel (215) is slidably sleeved on the outer surface of each movable shaft (214). Each limiting wheel (215) extends into the corresponding limiting groove (103). The outer surface of one side of each limiting wheel (215) is fitted with the inner wall of one side of the limiting groove (103). A sliding frame (216) is fixedly connected to the outer surface of the other side of each patch (212). An adjusting block (219) is slidably embedded inside each sliding frame (216). One side of each sliding frame (216) has a sliding adjustment block (219) slidably embedded inside each sliding frame (219). A rotating tube (217) is rotatably connected to the outer surface of each rotating tube (217). An adjusting worm gear is sleeved on the outer surface of each rotating tube (217). A movable threaded rod (218) is threadedly connected inside each rotating tube (217). One end of each movable threaded rod (218) is fixedly connected to the outer surface of one side of the corresponding adjusting block (219). A positioning bolt (221) slides through one side of the outer surface of each adjusting block (219). One end of each positioning bolt (221) is threadedly connected to one end of the corresponding moving shaft (214). An adjusting worm (220) is rotatably connected to the outer surface of the other side of each plate (212). Each adjusting worm (220) meshes with the corresponding adjusting worm gear.

2. The guide and anti-deviation device for an open-type TBM anchor drilling rig trolley as described in claim 1, characterized in that: Two connecting pieces (102) are fixedly connected to the inner walls on both sides of each of the annular beams (101). The two annular beams (101) are fixedly connected by the connecting pieces (102) and bolts. A fixing frame (104) is fixedly connected inside each annular beam (101).

3. The guide and anti-deviation device for an open-type TBM anchor drilling rig trolley as described in claim 2, characterized in that: The extension frame (205) has multiple mounting holes equidistantly opened on both sides of its outer surface, and each of the mounting holes is threaded with a mounting bolt (206).

4. The guide and anti-deviation device for an open-type TBM anchor drilling rig trolley as described in claim 3, characterized in that: The inner wall of one side of the movable frame (201) is rotatably connected to a swing arm worm gear (204), and a first bevel gear is sleeved on the outer surface of the swing arm worm gear (204).

5. The guide and anti-deviation device for an open-type TBM anchor drilling rig trolley as described in claim 4, characterized in that: The outer surface of the rotating frame (203) is fitted with a swing arm worm gear, which meshes with the swing arm worm (204).

6. The guide and anti-deviation device for an open-type TBM anchor drilling rig trolley as described in claim 5, characterized in that: The inner wall of one side of the movable frame (201) is rotatably connected to a connecting shaft, and the outer surface of the connecting shaft is also fitted with a first bevel gear. The two first bevel gears mesh, and one end of the connecting shaft is fixedly connected to the output end of the swing arm motor (202).

7. The guide and anti-deviation device for an open-type TBM anchor drilling rig trolley as described in claim 6, characterized in that: The inner wall of the other side of the drive frame (207) is rotatably connected to a drive worm (211), which meshes with a drive worm wheel. A second bevel gear is sleeved on the outer surface of the drive worm (211).

8. The guide and anti-deviation device for an open-type TBM anchor drilling rig trolley as described in claim 7, characterized in that: A drive motor (208) is fixedly connected to one side of the outer surface of the drive frame (207). The output end of the drive motor (208) extends into the drive frame (207). A second bevel gear is also fitted on the output end of the drive motor (208). The two second bevel gears mesh.

Citation Information

Patent Citations

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