A full-face tunneling machine edge cutter fixing device and installation method

Abstract

The application relates to a full-face tunneling machine edge roller cutter fixing device and a mounting method, the fixing device is mounted on a cutter head of the tunneling machine and used for fixing an edge roller cutter (4), and the fixing device comprises an L-shaped cutter seat (2) mounted on the cutter head of the tunneling machine and a fixing base (1) detachably mounted at the end of the cutter seat (2) and forming a U-shaped support with the L-shaped vertical plate of the cutter seat (2); the left end of a cutter shaft of the edge roller cutter (4) is clamped and connected to the U-shaped mounting groove in the fixing base (1) through a wedge block (7), and the right end is inserted and connected to the L-shaped vertical plate of the cutter seat (2); the mounting method comprises the steps of mounting the fixing base, inserting and connecting the right end of the cutter shaft, fixing the left end of the cutter shaft, and locking the right end of the cutter shaft. The application simplifies the fixing mode and the dismounting mode of the edge roller cutter, does not need to excavate additional space for dismounting the edge roller cutter, reduces the maintenance workload, simplifies the dismounting operation, shortens the dismounting time, and improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of full-face tunneling machine construction technology, specifically to a side cutter fixing device and installation method for a full-face tunneling machine. Background Technology

[0002] Full-face tunnel boring machines (TBMs) are large-scale underground construction equipment integrating mechanical, electrical, and hydraulic systems, with a high degree of technological intensity. They are mainly used for tunneling and construction in rock geological structures, such as railways, highways, water conservancy and hydropower diversion tunnels, subways, and underground engineering projects. The TBM's rock cutterhead is equipped with roller cutters. During tunneling, the rotation of the cutterhead causes the roller cutters to crush and break the rock. For hard rock, after long-distance tunneling, roller cutter wear is inevitable, requiring frequent access to the cutter head for replacement. Current roller cutter installation methods require artificially enlarging the excavation diameter to allow sufficient space for replacement before disassembling and reassembling the cutters. This process is time-consuming, labor-intensive, and inefficient, necessitating improvement and upgrading. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a side cutter fixing device and installation method for a full-face tunneling machine. This simplifies the side cutter fixing and disassembly methods, eliminating the need to excavate sufficient space for disassembly and replacement of the side cutters during maintenance. This significantly reduces the workload of side cutter replacement and maintenance, simplifies disassembly and assembly operations, shortens disassembly and assembly time, and improves work efficiency.

[0004] The objective of this invention is achieved as follows: A side cutter fixing device for a full-face tunneling machine is installed on the cutterhead of the tunneling machine for fixing the side cutter. It includes an L-shaped cutter holder installed on the cutterhead of the tunneling machine and a fixing seat detachably installed at the end of the cutter holder and forming a U-shaped support with the L-shaped vertical plate of the cutter holder. The left end of the cutter shaft of the side cutter is engaged in the U-shaped mounting groove of the fixing seat by a wedge, and the right end is inserted into the L-shaped vertical plate of the cutter holder. The cutter shaft has a central through hole, and a locking mechanism provided in the central through hole locks the cutter shaft and the L-shaped vertical plate together.

[0005] Furthermore, the fixing seat is fixed to the tool holder by multiple tension bolts.

[0006] Furthermore, the fixed base has a boss at the center of its bottom, which is fitted into contact with the groove on the tool holder.

[0007] Furthermore, the left end of the cutter shaft is provided with a trapezoidal part formed by a vertical surface and an inclined surface, and the right end is provided with a conical part; the vertical surface and the inclined surface of the trapezoidal part are in contact with the U-shaped mounting groove and the wedge block of the fixed seat, respectively; the conical part is in limiting contact with the conical surface set on the L-shaped vertical plate of the cutter holder.

[0008] Furthermore, the wedge block is provided with a vertical through hole, and a wedge block bolt is provided inside to fix the wedge block in the U-shaped mounting groove of the fixing seat.

[0009] Furthermore, the L-shaped vertical plate of the tool holder is provided with a tapered bushing, which is engaged and limited to the tapered part at the right end of the tool shaft.

[0010] Furthermore, the locking mechanism includes a cutter shaft bolt passing through the central through hole of the cutter shaft and a mounting base fixed on the L-shaped vertical plate of the cutter holder; the cutter shaft bolt is screwed and locked in the threaded hole of the mounting base.

[0011] Furthermore, the mounting base is provided with a boss that is assembled and connected to the L-shaped vertical plate of the tool holder, which facilitates the positioning and installation of the mounting base and increases the structural strength.

[0012] A method for installing the side cutterhead of a full-face tunneling machine, the method being implemented based on any of the aforementioned side cutterhead fixing devices for full-face tunneling machines, comprising the following steps: Step 1: Insert the right end of the hobbing cutter shaft into the L-shaped vertical plate of the cutter holder; Step 2: Install the fixing seat onto the end of the tool holder, and place the left end of the side hob cutter shaft into the U-shaped mounting groove of the fixing seat; Step 4: Install the wedge block in the U-shaped mounting groove of the fixed seat, and use the U-shaped mounting groove, the wedge block and the left end of the cutter shaft to fix the left end of the hobbing cutter shaft. Step 5: Lock the cutter shaft to the L-shaped vertical plate through the locking mechanism set in the center through hole, fix the right end of the side hob cutter shaft, and complete the fixed installation of the side hob.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention discloses a side cutter fixing device for a full-face tunneling machine. A fixing seat is disassembled and installed on the cutter holder. The right end of the cutter shaft is limited and locked using an insert and locking connection between the cutter holder and the right end of the cutter shaft. The left end of the cutter shaft is fixed by a U-shaped mounting groove of the fixing seat engaging with a wedge block and the left end of the cutter shaft. This significantly simplifies the side cutter fixing structure, and all operations are performed only on the left end of the cutter holder, avoiding the need for additional excavation space on the right end. This reduces the workload during side cutter replacement and maintenance, simplifies disassembly and assembly, shortens disassembly and assembly time, and improves work efficiency. This invention provides a method for installing the side cutter head of a full-face tunneling machine. The installation and removal of the side cutter head only requires operation on one side of the cutter holder, which simplifies the fixing and disassembly methods of the side cutter head. During maintenance, there is no need to excavate enough space for disassembly and replacement of the side cutter head, simplifying the disassembly and assembly operations and improving work efficiency. Attached Figure Description

[0014] Fig. 1 This is a right view of a side cutter fixing device for a full-face tunneling machine according to the present invention.

[0015] Fig. 2 This is a front view of a side cutter fixing device for a full-face tunneling machine according to the present invention.

[0016] Fig. 3 This is a top view of a side cutter fixing device for a full-face tunneling machine according to the present invention.

[0017] in: 1. Fixed seat, 2. Tool holder, 3. Tensioning bolt, 4. Side hob, 5. Bushing, 6. Mounting seat, 7. Wedge block, 8. Wedge block bolt, 9. Tool shaft bolt. Implementation

[0018] See Figs. 1-3 This invention relates to a side cutter fixing device for a full-face tunneling machine, which is installed on the cutterhead of the tunneling machine to fix the side cutter 4. It includes an L-shaped cutter holder 2 installed on the cutterhead, and a fixing seat 1 detachably installed at the end of the cutter holder 2 by multiple tension bolts 3, forming a U-shaped support with the L-shaped vertical plate of the cutter holder 2. To reduce the lateral shear stress borne by the tension bolts 3, a boss is provided at the center of the bottom of the fixing seat 1, which corresponds to the groove on the cutter holder 2. For ease of installation, the fixing seat 1 has bolt holes with a diameter slightly larger than that of the tension bolts 3 for easy passage and positioning. The cutter holder 2 has corresponding threaded holes. The L-shaped vertical plate of the cutter holder 2 has openings for installing a tapered bushing 5 and a mounting seat 6. The bushing 5 is interference-fitted into one side of the opening in the L-shaped vertical plate, and the mounting seat 6 has a boss that is embedded into the other side of the opening in the L-shaped vertical plate, facilitating the positioning and installation of the mounting seat 6 and increasing structural strength. The mounting seat 6 has threaded holes concentric with the axis of the bushing 5. The left end of the cutter shaft of the edge hob 4 is engaged in the U-shaped mounting groove of the fixed base 1 by a wedge block 7, and the right end is inserted into the L-shaped vertical plate of the cutter holder 2; the cutter shaft is provided with a central through hole, and the cutter shaft is locked to the L-shaped vertical plate by a locking mechanism provided in the central through hole; The left end of the cutter shaft has a trapezoidal portion formed by a vertical surface and an inclined surface, and the right end has a conical portion. The trapezoidal portion, the wedge 7, and the U-shaped mounting groove of the fixing seat 1 form a mating and snap-fit ​​structure, that is, the vertical surface and the inclined surface of the trapezoidal portion contact the U-shaped mounting groove of the fixing seat 1 and the inclined surface of the wedge 7, respectively, and the vertical surface of the wedge 7 contacts the U-shaped mounting groove. The wedge 7 has a vertical through hole, and a wedge bolt 8 is provided inside to fix the wedge 7 in the U-shaped mounting groove of the fixing seat 1. The conical portion at the right end of the cutter shaft makes limiting contact with the conical surface of the conical bushing 5 set on the L-shaped vertical plate of the cutter seat 2, and the limiting and positioning of the right end of the cutter shaft is achieved by the contact between the conical portion and the conical surface of the conical bushing 5. The locking mechanism includes a cutter shaft bolt 9 passing through the central through hole of the cutter shaft and a mounting seat 6 fixed on the L-shaped vertical plate of the cutter holder 2. The right end of the cutter shaft is fixed on the L-shaped vertical plate of the cutter holder 2 by screwing the cutter shaft bolt 9 into the threaded hole of the mounting seat 6.

[0019] In conjunction with the above embodiments, the present invention relates to a method for installing side cutters on a full-face tunneling machine, comprising the following steps: Step 1: Insert the tapered part of the right end of the hob 4 into the tapered bushing 5 on the L-shaped vertical plate of the tool holder 2; use the tapered part and the tapered surface of the bushing 5 to achieve the limiting and positioning of the right end of the hob. Step 2: Use the tension bolt 3 to install the fixing seat 1 to the end of the tool holder 2, wherein the bottom boss of the fixing seat 1 is embedded in the groove at the end of the tool holder 2; at the same time, place the left end of the side hob 4 cutter shaft into the U-shaped mounting groove of the fixing seat 1; Step 3: Place wedge 7 into the U-shaped mounting groove of the fixed seat 1, and use wedge bolt 8 to fix wedge 7 to the fixed seat 1 through the vertical through hole on wedge 7. Use the U-shaped mounting groove, wedge 7 and trapezoidal part of the left end of the cutter shaft to fix the left end of the cutter shaft of the side hob 4. Step 4: Insert the cutter shaft bolt 9 into the central through hole of the cutter shaft and screw it into the threaded hole of the mounting base 6. Lock the right end of the cutter shaft to the L-shaped vertical plate to fix the right end of the side hob 4 cutter shaft, and complete the fixed installation of the side hob 4.

[0020] Furthermore, when maintenance and disassembly are required, simply reverse the steps described above to achieve quick disassembly of the hobbing cutter.

[0021] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A side cutter fixing device for a full-face tunneling machine, installed on the cutterhead of the tunneling machine for fixing the side cutter (4), characterized in that: Includes an L-shaped cutterhead (2) mounted on the cutterhead of a tunneling machine and a fixed seat (1) detachably mounted at the end of the cutterhead (2) and forming a U-shaped support with the L-shaped vertical plate of the cutterhead (2). The left end of the cutting shaft of the edge hob (4) is engaged with the U-shaped mounting groove of the fixed seat (1) by a wedge (7), and the right end is inserted into the L-shaped vertical plate of the cutter holder (2); the left end of the cutting shaft is provided with a trapezoidal part formed by a vertical surface and an inclined surface, and the right end is provided with a conical part; the vertical surface and the inclined surface of the trapezoidal part are in contact with the U-shaped mounting groove and the wedge (7) of the fixed seat (1) respectively; the conical part is in limiting contact with the conical surface provided on the L-shaped vertical plate of the cutter holder (2); The cutter shaft is provided with a central through hole, and the cutter shaft is locked to the L-shaped vertical plate through the locking mechanism provided in the central through hole; the locking mechanism includes a cutter shaft bolt (9) passing through the central through hole of the cutter shaft and a mounting seat (6) fixed on the L-shaped vertical plate of the cutter holder (2); the cutter shaft bolt (9) is screwed and locked in the threaded hole of the mounting seat (6).

2. The side cutter fixing device for a full-face tunneling machine according to claim 1, characterized in that: The mounting base (1) is fixed to the tool holder (2) by multiple tension bolts (3).

3. The side cutter fixing device for a full-face tunneling machine according to claim 1, characterized in that: The fixed base (1) has a boss at the center of its bottom, which is in contact with the groove on the tool holder (2).

4. The side cutter fixing device for a full-face tunneling machine according to claim 1, characterized in that: The wedge (7) is provided with a vertical through hole, and a wedge bolt (8) is provided inside to fix the wedge (7) in the U-shaped mounting groove of the fixing seat (1).

5. The side cutter fixing device for a full-face tunneling machine according to claim 1, characterized in that: The L-shaped vertical plate of the tool holder (2) is provided with a tapered bushing (5), which is engaged with the tapered part at the right end of the tool shaft for limiting insertion.

6. The side cutter fixing device for a full-face tunneling machine according to claim 1, characterized in that: The mounting base (6) is provided with a boss that is assembled and connected to the L-shaped vertical plate of the knife holder (2), which facilitates the positioning and installation of the mounting base (6) and increases the structural strength.

7. A method for installing side cutterheads on a full-face tunneling machine, characterized in that: The installation method is based on any one of the full-face tunneling machine side cutter fixing devices according to claims 1 to 6, and includes the following steps: Step 1: Insert the right end of the side hob (4) cutter shaft into the L-shaped vertical plate of the cutter holder (2); Step 2: Install the fixed seat (1) onto the end of the tool holder (2), and place the left end of the side hob (4) cutter shaft into the U-shaped mounting groove of the fixed seat (1); Step 3: Install wedge (7) in the U-shaped mounting groove of the fixed seat (1), and fix the left end of the cutter shaft of the side hob (4) by using the U-shaped mounting groove, wedge (7) and the left end of the cutter shaft to fix the left end of the cutter shaft. Step 4: Lock the cutter shaft to the L-shaped vertical plate through the locking mechanism set in the central through hole, fix the right end of the cutter shaft of the side hob (4), and complete the fixed installation of the side hob (4).

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