TBM (Tunnel Boring Machine) integrated hob holder system capable of quickly changing hob

Abstract

The invention provides a TBM (Tunnel Boring Machine) integrated hobbing cutter holder system capable of quickly changing cutters, which comprises a hobbing cutter ring (1), a cutter box (2), a C-shaped block (8), a hobbing cutter shaft (9) and a pressing device, and is characterized in that the hobbing cutter ring (1) is connected to the hobbing cutter shaft (9); the C-shaped block (8) is fixed on the hob box (2) and is used for bearing the hob shaft (9); the pressing device comprises a first arc-shaped connecting rod (4), a first transmission sliding block (5), a lifting sliding block (6), a fastening stud (7), a wedge-shaped pressing sliding block (10), a second arc-shaped connecting rod (11), a second transmission sliding block (12) and a third arc-shaped connecting rod (22). The wedge-shaped end of the wedge-shaped pressing sliding block (10) and the C-shaped block (8) are located on the two sides of the hob shaft (9) respectively, and the other end of the wedge-shaped pressing sliding block (10) and the second arc-shaped connecting rod (11) form a rotating pair through a rotating shaft. Threaded holes used for installing the fastening studs (7) are formed in the cutter box (2).

Description

Technical Field

[0001] The invention relates to the field of TBM (full-face rock tunnel boring machine), in particular to a roller cutter seat system for replacing a TBM roller cutter. Background Art

[0002] As a tunnel construction machine, the full-face tunnel boring machine (TBM) is under construction. Due to the complex working conditions and serious damage to key components during the construction process, the roller cutter installed on the cutterhead is a vulnerable key component that affects tunnel excavation and needs to be replaced in time, otherwise it is easy to reduce the excavation efficiency of the TBM. At present, tool detection and tool changing work mainly rely on manual work. Affected by many factors such as small space, large tool mass, many discrete parts of the tool holder, and complex tool changing steps, the time and cost spent on tool replacement account for about 1 / 3 of the total project. Moreover, the tool changing environment at the TBM construction site is extremely harsh, and long-term high-intensity tool changing operations bring great risks to workers.

[0003] The traditional hob cutter holder system is connected by bolts, with many discrete fasteners, which is cumbersome to disassemble and assemble, and requires a lot of time and energy to change the cutter. Therefore, changing the traditional hob cutter holder structure and reducing the number of hob cutter holder parts is a prerequisite and urgent problem to improve the efficiency of manual tool change and realize automatic tool change. Summary of the invention

[0004] The present invention aims to provide a TBM hob cutter holder system that can quickly change cutters. The hob cutter shaft can be locked and loosened by rotating the fixing stud to drive the wedge-shaped clamping slider to move, thereby replacing the hob cutter. The fasteners do not need to be removed during the tool change process, which can reduce the disassembly and assembly actions and improve the tool change efficiency. The specific technical solution is as follows:

[0005] A TBM integrated hob cutter seat system capable of rapid tool change comprises a hob cutter ring 1, a cutter box 2, a C-shaped block 8, a hob cutter shaft 9 and a clamping device, wherein the hob cutter ring 1 is connected to the hob cutter shaft 9; the C-shaped block 8 is fixed on the cutter box 2 and is used to carry the hob cutter shaft 9; wherein,

[0006] The clamping device includes a first arc-shaped connecting rod 4, a first transmission slider 5, a lifting slider 6, a fixing stud 7, a wedge-shaped clamping slider 10, a second arc-shaped connecting rod 11, a second transmission slider 12, and a third arc-shaped connecting rod 22; the first transmission slider 5, the first arc-shaped connecting rod 4, the lifting slider 6, the third arc-shaped connecting rod 22 and the second transmission slider 12 are located on the same side of the tool box 2; the second arc-shaped connecting rod 11 is located at the corner of the tool box 2, and the wedge-shaped clamping slider 10 and the C-shaped block 8 are located on the other side of the tool box 2;

[0007] The wedge-shaped end of the wedge-shaped pressing slider 10 and the C-shaped block 8 are respectively located on both sides of the hob cutter shaft 9, the other end of the wedge-shaped pressing slider 10 and the second arc-shaped connecting rod 11 form a rotating pair through a rotating shaft, and the second arc-shaped connecting rod 11 and the second transmission slider 12 form a rotating pair through a rotating shaft;

[0008] The first transmission slider 5 and the first arc-shaped connecting rod 4 form a rotating pair through a rotating shaft;

[0009] A stepped hole is provided on the lifting slider 6, and a disc-shaped block is connected to the locking stud 7. The disc-shaped block is located in the stepped hole and can rotate freely around the stepped hole; the lifting slider 6 and the first arc-shaped connecting rod 4 form a rotating pair through a rotating axis; the second transmission slider 12 and the third arc-shaped connecting rod 22 form a rotating pair through a rotating axis, and the lifting slider 6 and the third arc-shaped connecting rod 22 form a rotating pair through a rotating axis, and a threaded hole for installing the locking stud 7 is provided on the tool box 2.

[0010] Furthermore, the lifting slider 6 includes a lifting slider base 6A and a lifting slider cover 6B. The lifting slider 6B is fixedly connected to the lifting slider base 6A. A stepped hole 6C is provided at the position where the lifting slider base 6A and the lifting slider 6B are connected.

[0011] Furthermore, the first transmission slider 5 and the lifting slider 6 slide along the vertical slide grooves respectively, and the second transmission slider 12 slides along the transverse slide groove; the wedge-shaped pressing slider 10 slides along the transverse slide groove on one side of the C-shaped block 8.

[0012] Furthermore, it also includes a baffle 3, which is fixed on the tool box and is used to limit the movement of the clamping device and prevent foreign matter from entering the tool box slide groove during the operation of the roller cutter.

[0013] Furthermore, the two revolving pairs at both ends of the second arc-shaped connecting rod 11 both use the bolt as a rotation axis.

[0014] Furthermore, the rotating pairs connected to the lifting slider 6 all use the pin shaft as the rotation axis.

[0015] Furthermore, there are two third arc-shaped connecting rods 22 , which are separated on both sides of the third arc-shaped connecting rod 22 , and a retaining ring 23 is provided between the two third arc-shaped connecting rods 22 for positioning.

[0016] Furthermore, the tool box 2 is provided with a first slot 2A for installing a C-shaped block, a second slot 2B for the hob cutter shaft 9 to pass through during loading and unloading, a third slot 2C for installing a wedge-shaped clamping slider 10, a fourth slot 2D for installing the first transmission slider 5 and the second transmission slider 12, and a fifth slot 2E for installing the lifting slider 6.

[0017] The advantages of the TBM integrated hob cutter holder system capable of rapid tool change of the present invention compared with the existing hob cutter holder system are:

[0018] (1) Structural integration. When replacing a hob, the existing hob cutter seat system needs to disassemble and assemble fasteners such as clamping blocks, wedge blocks and bolts. The discrete fasteners make the tool change steps cumbersome, which seriously reduces the efficiency of hob replacement. The present invention integrates the clamping device of the hob into one mechanism. When replacing the hob, there is no need to disassemble the fasteners, which greatly improves the tool change efficiency. It also facilitates the design of the end effector of the tool changing robot and helps to realize automatic tool change.

[0019] (2) Easy to operate. When replacing the hob, the existing hob cutter holder system needs to disassemble and assemble the two clamping devices on both sides of the hob cutter shaft respectively, while the present invention can loosen and tighten the hob cutter shaft only by loosening and tightening a set of fixing studs and nuts, which simplifies the hob cutter replacement process and reduces the tool change time.

[0020] (3) Compact structure. The clamping device of the present invention uses an arc-shaped connecting rod instead of a linear connecting rod in the design of the spatial connecting rod slider mechanism, which can effectively reduce the movement space of the connecting rod, save the installation space of the clamping device, reduce the volume of the slot installed on the tool box, and make the structure of the integrated hob cutter seat system more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The general assembly diagram of the present invention

[0022] Figure 2 It is a schematic diagram of the internal clamping device when the hob is clamped according to the present invention.

[0023] Figure 3 It is a schematic diagram of the internal clamping device of the present invention when the hob is disassembled.

[0024] Figure 4 This is a cross-sectional view of the tool box.

[0025] Figure 5 This is a diagram for installing a C-shaped block.

[0026] Figure 6 This is a schematic diagram of the assembly of the wedge-shaped clamping slider and the arc-shaped connecting rod.

[0027] Figure 7 It is a schematic diagram of the assembly of the transmission slider and the arc connecting rod.

[0028] Figure 8 It is a schematic diagram of the assembly of the locking stud and the lifting slider.

[0029] Fig. 9 This is a schematic diagram of the lifting slider assembly.

[0030] Fig.10 Schematic diagram of baffle 3.

[0031] Description of Reference Numerals

[0032] 1-hob cutter ring, 2-cutter box, 3-baffle, 4-first arc-shaped connecting rod, 5-first transmission slider, 6-lifting slider, 7-fastening stud, 8-C-shaped block, 9-hob cutter shaft, 10-wedge-shaped clamping slider, 11-second arc-shaped connecting rod, 12-second transmission slider, 13-locking nut, 14-fastening bolt, 15-bolt, 16-first bushing, 17-washer, 18-flat nut, 19-pin, 20-second bushing, 21-screw, 22-third arc-shaped connecting rod, 23-retaining ring, 24-third bushing, 25-pin. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific examples.

[0034] like Figure 1 As shown, the present invention provides a TBM hob cutter seat system capable of rapid tool change, comprising a hob cutter ring 1, a cutter box 2, a C-shaped block 8, a hob cutter shaft 9, and a clamping device. The hob cutter ring 1 is mounted on the hob cutter shaft 9, and the clamping device is mainly composed of a first arc-shaped connecting rod 4, a first transmission slider 5, a lifting slider 6, a fixing stud 7, a wedge-shaped clamping slider 10, a second arc-shaped connecting rod 11, a second transmission slider 12, and a third arc-shaped connecting rod 22. Figure 1 In order to more clearly express the structure of the tool holder system, except for the slide groove of the lifting slide 6, the slide grooves of other slides are not drawn.

[0035] like Figure 4 As shown, the tool box 2 is provided with a threaded hole for installing a fixing stud 7, a first slot 2A for installing a C-shaped block, a second slot 2B for allowing the hob cutter shaft 9 to pass through during loading and unloading, a third slot 2C for installing a wedge-shaped clamping slider 10, a fourth slot 2D for installing the first transmission slider 5 and the second transmission slider 12, and a fifth slot 2E for installing a lifting slider.

[0036] like Figure 5 As shown, the C-shaped block 8 is fixed to the tool box 2 by means of a fixing bolt 14 . When the hob is installed, the C-shaped block 8 carries the hob shaft 9 .

[0037] like Figure 6 As shown, the revolving pair consisting of the wedge-shaped pressing slider 10 and the second arc connecting rod 11 is connected by bolts 15, washers 17 and flat nuts 18. The hob is subjected to a strong impact load during operation. The wedge-shaped pressing slider 10 and the second arc connecting rod 11 are connected by bolts to improve the reliability of the connection. A first bushing 16 is also provided between the second arc connecting rod 11 and the bolt 15 to reduce wear. The revolving pair consisting of the first transmission slider 5 and the second arc connecting rod 11 and the revolving pair consisting of the second transmission slider 12 and the second arc connecting rod 11 adopt the same connection method.

[0038] like Figure 7 As shown, the revolving pair composed of the first transmission slider 5 and the first arc-shaped connecting rod 4 uses the pin 19 as the rotating axis, and the pin 19 is fixed to the first transmission slider 5 by a screw 21. A second bushing 20 is also provided between the first arc-shaped connecting rod 4 and the pin 19 to reduce wear. The revolving pair composed of the lifting slider 6 and the first arc-shaped connecting rod 4 adopts the same connection method. The revolving pair composed of the second transmission slider 12 and the third arc-shaped connecting rod 22 also uses the pin as the rotating axis. There is a retaining ring 23 between the two third arc-shaped connecting rods 22 for positioning, and a third bushing 24 is also provided between the third arc-shaped connecting rod 22, the retaining ring 23 and the pin 19 to reduce wear. The revolving pair composed of the lifting slider 6 and the third arc-shaped connecting rod 22 adopts the same connection method. The installation space of the rotating axis on the first transmission slider 5, the second transmission slider 12 and the lifting slider 6 is small, and the use of a pin for connection can effectively save space.

[0039] like Figure 8 , Fig. 9 As shown, the lifting slider 6 is composed of a lifting slider base 6A and a lifting slider cover 6B. The lifting slider 6B is fixed to the lifting slider base 6A by screws 6D. A disc block is connected to the fixing stud 7, which can be installed in the stepped hole 6C of the lifting slider 6 and can rotate freely around the stepped hole.

[0040] like Fig.10 As shown, the baffle is installed on the tool box by screws, which can limit the movement of the clamping device and prevent foreign matter from entering the tool box slide groove during the operation of the hob, thereby hindering the movement of the clamping device.

[0041] When using the present invention, when installing a hob consisting of a hob cutter ring 1 and a hob shaft 9, first place the hob on the C-shaped block 8 along the second slot 2B on the cutter box 2, then rotate the fixing stud 7, the fixing stud 7 pushes the lifting slider 6 to move upward, the first arc connecting rod 4 and the third arc connecting rod 22 connected to the lifting slider 6 push the first transmission slider 5 and the second transmission slider 12 to move in opposite directions, respectively push the two wedge-shaped pressing sliders 10 in the third slots 2C on both sides of the cutter box to press the two ends of the hob shaft 9, and lock the hob shaft 9. Finally, tighten the anti-loosening nut 13 to form a structure similar to a top nut with the threaded hole on the cutter box to prevent loosening. On the contrary, when removing the hob, first loosen the anti-loosening nut 13, and then rotate the locking stud 7. The locking stud 7 drives the lifting slide block 6 to move downward, and the first arc connecting rod 4 and the third arc connecting rod 22 connected to the lifting slide block 6 pull the first transmission slide block 5 and the second transmission slide block 12 to move toward each other, and pull the wedge-shaped clamping slide blocks 10 on both sides of the tool box to loosen the hob shaft 9 and retract it into the third slot 2C of the tool box 2, so that the hob can be removed from the C-shaped block and taken out through the second slot 2B to achieve replacement of the hob.

[0042] Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, ordinary technicians in this field can make many modifications without departing from the purpose of the present invention, which are all within the protection of the present invention.

Claims

1. A TBM integrated hob cutter seat system capable of rapid tool change, comprising a hob cutter ring (1), a cutter box (2), a C-shaped block (8), a hob cutter shaft (9) and a clamping device, wherein the hob cutter ring (1) is connected to the hob cutter shaft (9); the C-shaped block (8) is fixed on the cutter box (2) and is used to carry the hob cutter shaft (9); and the characteristics are as follows: The clamping device comprises a first arc-shaped connecting rod (4), a first transmission slider (5), a lifting slider (6), a fixing stud (7), a wedge-shaped clamping slider (10), a second arc-shaped connecting rod (11), a second transmission slider (12), and a third arc-shaped connecting rod (22); the first transmission slider (5), the first arc-shaped connecting rod (4), the lifting slider (6), the third arc-shaped connecting rod (22) and the second transmission slider (12) are located on the same side of the tool box (2); the second arc-shaped connecting rod (11) is located at the corner of the tool box (2), and the wedge-shaped clamping slider (10) and the C-shaped block (8) are located on the other side of the tool box (2); The wedge-shaped end of the wedge-shaped pressing slider (10) and the C-shaped block (8) are respectively located on both sides of the hob cutter shaft (9); the other end of the wedge-shaped pressing slider (10) and the second arc-shaped connecting rod (11) form a rotating pair through a rotating shaft; the second arc-shaped connecting rod (11) and the second transmission slider (12) form a rotating pair through a rotating shaft; The first transmission slider (5) and the first arc-shaped connecting rod (4) form a rotating pair via a rotating shaft; A step hole is provided on the lifting slider (6), and a disc block is connected to the fixing stud (7). The disc block is located in the step hole and can rotate freely around the step hole. The lifting slider (6) and the first arc-shaped connecting rod (4) form a rotating pair through a rotating shaft. The second transmission slider (12) and the third arc-shaped connecting rod (22) form a rotating pair through a rotating shaft. The lifting slider (6) and the third arc-shaped connecting rod (22) form a rotating pair through a rotating shaft. A threaded hole for installing the fixing stud (7) is provided on the tool box (2).

2. The TBM integrated hob cutter head system according to claim 1, characterized in that: The lifting slider (6) comprises a lifting slider base (6A) and a lifting slider cover plate (6B); the lifting slider (6B) is fixedly connected to the lifting slider base (6A); and a stepped hole (6C) is provided at a position where the lifting slider base (6A) and the lifting slider (6B) are connected.

3. The TBM integrated hob cutter head system according to claim 1, characterized in that: The first transmission slider (5) and the lifting slider (6) slide along the vertical slide grooves respectively, and the second transmission slider (12) slides along the transverse slide groove; the wedge-shaped pressing slider (10) slides along the transverse slide groove on one side of the C-shaped block (8).

4. The TBM integrated hob cutter head system according to claim 1, characterized in that: It also comprises a baffle (3) which is fixed on the tool box and is used to limit the movement of the clamping device and prevent foreign matter from entering the tool box slide groove during the operation of the roller cutter.

5. The TBM integrated hob cutter head system according to claim 1, characterized in that: The two rotating pairs at both ends of the second arc-shaped connecting rod (11) both use the bolt as a rotation axis.

6. The TBM integrated hob cutter head system according to claim 1, characterized in that: The rotating pairs connected to the lifting slider (6) all use the pin shaft as the rotating axis.

7. The TBM integrated hob cutter head system according to claim 1, characterized in that: There are two third arc-shaped connecting rods (22), which are separated on both sides of the third arc-shaped connecting rod (22). A retaining ring (23) is provided between the two third arc-shaped connecting rods (22) for positioning.

8. The TBM integrated hob cutter head system according to claim 1, characterized in that: The tool box (2) is provided with a first slot (2A) for installing a C-shaped block, a second slot (2B) for a hob cutter shaft (9) to pass through during loading and unloading, a third slot (2C) for installing a wedge-shaped pressing slider (10), a fourth slot (2D) for installing a first transmission slider (5) and a second transmission slider (12), and a fifth slot (2E) for installing a lifting slider (6).

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