A cutterhead holder for testing tunnel boring machine cutterheads

Abstract

This utility model discloses a cutterhead holder for testing tunnel boring machine cutterheads, comprising: a base with a guide rail; a mounting seat fixedly mounted on the base, with guide shafts mounted at least at the upper two corners; a sliding frame with a first slider at the bottom and its upper corners slidably fitted onto the guide shafts; a cutterhead rotatably mounted on the front side of the sliding frame; a cutterhead seat detachably and fixedly mounted on the front side of the cutterhead; a rotary drive mechanism mounted on the sliding frame and connected to the cutterhead drive mechanism; and a sliding drive mechanism for driving the sliding frame to slide. The guide rail and the first slider form a reliable sliding fit, providing stable bottom support and guidance for the sliding frame; the guide shafts at at least two corners of the upper end of the mounting seat pass through the corners of the sliding frame, forming an upper constraint on the sliding frame. This dual-fit structure of bottom sliding support and upper guide limit significantly improves the stability of the sliding frame in an upright state, effectively preventing instability and tilting.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine cutterhead testing technology, and in particular, to a cutterhead holder for tunnel boring machine cutterhead testing. Background Technology

[0002] In tunnel boring machine (TBM) construction, the cutterhead, as a core component that directly contacts the rock at the tunnel face, directly determines construction efficiency and project costs based on its cutting performance, wear resistance, and structural strength. Because TBM cutterheads must withstand complex impact loads, frictional wear, and alternating stresses during actual operation, their comprehensive performance must be fully verified using testing equipment that simulates actual working conditions before being put into engineering applications.

[0003] In the testing equipment, the cutter roller usually slides with the sliding frame to simulate the excavation and excavation activities. However, since the sliding frame is in a vertical state, it is easy for the sliding frame to become unstable and tilt when it slides and when the cutter roller comes into contact with the simulated rock and soil structure. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cutterhead holder for testing tunnel boring machine cutterheads.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A cutterhead holder for testing tunnel boring machine cutterheads includes: a base with a guide rail extending in a front-to-back direction; a mounting base fixedly mounted on the base, with guide shafts extending in a front-to-back direction mounted at least at the upper two corners; a sliding frame located in front of the mounting base, with a first slider at the bottom adapted to the guide rail for sliding along the guide rail, and the upper corners slidably fitted onto the guide shafts; a cutterhead rotatably mounted on the front side of the sliding frame; a cutterhead holder detachably and fixedly mounted on the front side of the cutterhead and arranged around it, with cutterheads mounted on the cutterhead holder; a rotary drive mechanism mounted on the sliding frame and connected to the cutterhead drive mechanism for driving the cutterhead to rotate; and a sliding drive mechanism mounted on the mounting base for driving the sliding frame to slide.

[0007] Furthermore, a gear ring is fixedly installed on the rear side of the cutter head, and the rotating shaft of the rotary drive mechanism is connected to a drive gear. The drive gear meshes with the gear ring to drive the gear ring and the cutter head to rotate.

[0008] Furthermore, a connecting plate is installed on the front side of the sliding frame, and a guide inner ring is installed on the front side of the connecting plate. The gear ring is rotatably sleeved on the guide inner ring and axially fixed relative to the guide inner ring.

[0009] Furthermore, the cutter head has a raised positioning platform on its rear side, the gear ring has a protruding guide inner ring on its front side and is fitted onto the positioning platform, and the cutter head and the gear ring have corresponding holes for connection and fixation by fasteners.

[0010] Furthermore, the connecting plate has a first positioning groove on its front side, the guide inner ring protrudes from the toothed ring on its rear side and is embedded in the first positioning groove, and the guide inner ring and the connecting plate have corresponding holes for connection and fixation by fasteners.

[0011] Furthermore, a positioning block is installed on the rear side of the connecting plate, and a positioning hole for the positioning block to be inserted is provided on the front side of the sliding frame.

[0012] Furthermore, the guide shaft is provided with an extended portion at the corner of the front side of the sliding frame, and the guide shaft is movably inserted through the extended portion.

[0013] Furthermore, the sliding frame is provided with a through hole that passes through the extended portion and the sliding frame, and a sliding sleeve is embedded in the through hole, and the sliding sleeve is slidably mounted on the guide shaft.

[0014] Furthermore, guide shafts are installed at the four corners of the mounting base, and the extended portion has four sections, which are respectively located at the four corners of the sliding frame.

[0015] Furthermore, a second slider adapted to the guide rail is installed at the bottom of the extended portion at the bottom corner, and the second slider is slidably mounted on the guide rail.

[0016] This utility model has the following beneficial effects:

[0017] The base's guide rails and the first slider of the sliding frame form a reliable sliding engagement, providing stable bottom support and guidance for the sliding frame. Guide shafts at at least two corners of the upper end of the mounting base pass through the corners of the sliding frame, forming an upper constraint. This dual-fit structure of bottom sliding support and upper guide limit significantly improves the stability of the sliding frame in its vertical position, effectively preventing instability and tilting during sliding, and effectively resisting the lateral forces generated when the cutter head contacts the simulated rock and soil structure, thus preventing instability and tilting. The rotary drive mechanism is mounted on the sliding frame and connected to the cutterhead drive, providing stable rotational power to the cutterhead, ensuring the continuity and stability of the cutter head's rotational cutting, simulating real tunneling conditions. The sliding drive mechanism is mounted on the mounting base and drives the sliding frame to slide, allowing precise control of the sliding frame's feed speed and displacement. The cutter head holder is detachable to facilitate the replacement of cutters of different specifications, enabling testing of cutters of different specifications.

[0018] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form 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 undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 It is a schematic diagram of the disassembled structure of the sliding frame, cutter head, hob holder, and rotary drive mechanism;

[0022] Figure 3 This is a schematic diagram of the exploded structure of the cutter head and connecting plate;

[0023] Figure 4 yes Figure 3 Another structural diagram from a different perspective;

[0024] Figure 5 This is a partial sectional view of the mating of the gear ring and the guide inner ring.

[0025] Legend:

[0026] Base 100, guide rail 110;

[0027] Mounting base 200, guide shaft 210, threaded sleeve 211;

[0028] Sliding frame 300, first slider 310, connecting plate 320, positioning block 321, guide inner ring 330, convex ring 331, first positioning groove 340, positioning hole 350, extension part 360, through hole 361, sliding sleeve 370, second slider 380;

[0029] Cutter head 400, gear ring 410, retaining ring 411, cover ring 412, roller 413, positioning table 420;

[0030] Hob holder 500, hob 510;

[0031] Rotary drive mechanism 600, drive gear 610;

[0032] Sliding drive mechanism 700. Detailed Implementation

[0033] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0037] Please refer to Figure 1 and Figure 2 A preferred embodiment of the present invention provides a cutterhead holder for testing cutterheads in tunnel boring machines, comprising a base 100, a mounting base 200, a sliding frame 300, a cutterhead 400, a cutterhead holder 500, a rotary drive mechanism 600, and a sliding drive mechanism 700.

[0038] The base 100 is provided with a guide rail 110 extending in the front-to-back direction.

[0039] Mounting base 200 is fixedly mounted on base 100. At least two upper corners of mounting base 200 are fitted with guide shafts 210 extending in the front-rear direction. Mounting base 200 has holes for the guide shafts 210 to pass through. Screw sleeves 211 are threaded onto both sides of mounting base 200, and the two screw sleeves 211 clamp the mounting base 200, thus fixing the guide shafts 210 in place. Alternatively, a vertical bracket can be mounted on base 100, located in front of the guide rail 110. The vertical bracket is connected and fixed to the end of guide shaft 210 furthest from mounting base 200, thus supporting and fixing both ends of guide shaft 210, preventing one end of guide shaft 210 from being suspended and deformed, which would affect the smooth sliding of sliding frame 300.

[0040] The sliding frame 300 is located in front of the mounting base 200. The bottom of the sliding frame 300 is provided with a first slider 310 that is adapted to the guide rail 110. The first slider 310 is slidably mounted on the guide rail 110 so that it can slide along the guide rail 110. The upper corner of the sliding frame 300 is slidably sleeved on the guide shaft 210 so that it can slide along the guide shaft 210.

[0041] The cutter head 400 is rotatably mounted on the front side of the sliding frame 300.

[0042] The hob holder 500 is detachably and fixedly mounted on the front side of the cutter head 400. The hob holders 500 are arranged around the cutter head 400, and a hob 510 is mounted on the hob holder 500. The hob 510 can rotate along its own axis. The hob holder 500 is fixedly mounted on the cutter head 400 by detachable fasteners, thereby achieving detachability. Specifically, the hob holder 500 and the cutter head 400 have corresponding holes for connection and fixation by screws.

[0043] The rotary drive mechanism 600 is mounted on the sliding frame 300 and is connected to the cutter head 400 for driving the cutter head 400 to rotate.

[0044] A sliding drive mechanism 700 is mounted on the mounting base 200 and is used to drive the sliding frame 300 to slide. The sliding drive mechanism can be a hydraulic cylinder to provide sufficient propulsion force.

[0045] This utility model provides a cutterhead holder for shield tunneling cutterhead testing. The guide rail 110 of the base 100 forms a reliable sliding engagement with the first slider 310 of the sliding frame 300, providing stable bottom support and guidance for the sliding frame 300. The guide shafts 210 at at least two corners of the upper end of the mounting base 200 pass through the corners of the sliding frame 300, forming an upper constraint on the sliding frame 300. The dual engagement structure of bottom sliding support and upper guide limit significantly improves the stability of the sliding frame 300 in the vertical state, effectively preventing the sliding frame 300 from becoming unstable and tilting during sliding, and effectively resisting the lateral force generated when the cutterhead 510 contacts the simulated rock and soil structure, preventing the sliding frame 300 from becoming unstable and tilting. The simulated rock and soil structure can be a concrete block to simulate the contact between the cutterhead and the rock and soil. The rotary drive mechanism 600 is mounted on the sliding frame 300 and connected to the cutterhead 400, providing stable rotational power to the cutterhead 400 and ensuring the continuity and stability of the rotating cutting of the hob 510, simulating real tunneling conditions. The sliding drive mechanism 700 is mounted on the mounting base 200 to drive the sliding frame 300 to slide, precisely controlling the feed speed and displacement of the sliding frame 300. The hob holder 500 is detachable to facilitate the replacement of hobs of different specifications, enabling testing of hobs of different specifications.

[0046] Reference Figure 3 and Figure 4In some embodiments of this utility model, a gear ring 410 is fixedly installed on the rear side of the cutter head 400, and a drive gear 610 is connected to the rotating shaft of the rotary drive mechanism 600. The drive gear 610 meshes with the gear ring 410 to drive the gear ring 410 and the cutter head 400 to rotate. The gear ring 410 on the rear side of the cutter head 400 meshes with the drive gear 610 on the rotating shaft of the rotary drive mechanism 600. This gear transmission method has the characteristics of high transmission efficiency and smooth power transmission. Compared with belt or chain transmission, it can effectively avoid transmission lag and slippage, ensuring that the cutter head 400 can maintain a stable rotation speed under high load test conditions, making the cutting action of the hob 510 closer to the actual construction state. The rotary drive mechanism 600 can be a rotary motor, and multiple sets of rotary drive mechanisms 600 and drive gears 610 can be arranged in a circular pattern to realize multi-position power input and avoid the heavy load on a single motor caused by concentrated power input.

[0047] Reference Figure 3 and Figure 4 In some embodiments of this utility model, a connecting plate 320 is installed on the front side of the sliding frame 300, and a guide inner ring 330 is installed on the front side of the connecting plate 320. The gear ring 410 is rotatably sleeved on the guide inner ring 330 and axially fixed relative to the guide inner ring 330. The guide inner ring 330 installed on the front side of the connecting plate 320 provides precise rotational guidance and radial support for the gear ring 410. The rotatable sleeve of the gear ring 410 on the guide inner ring 330 and axially fixed effectively restricts its axial displacement and ensures the stability of the transmission.

[0048] Specifically, such as Figure 5 As shown, a raised ring 331 is provided in the middle of the peripheral wall of the guide inner ring 330. A retaining ring 411 with an inward protrusion is provided on one side of the inner ring of the gear ring 410, and a cover ring 412 is installed on the other side. A ring of rollers 413 is installed on the front and rear sides and the outer peripheral side of the raised ring 331, thereby reducing the friction when the two rotate relative to each other. The raised ring 331 is located between the retaining ring 411 and the cover ring 412, which also achieves axial positioning.

[0049] Reference Figure 4 In some embodiments of this utility model, a raised positioning platform 420 is provided on the rear side of the cutter head 400, and a guide inner ring 330 protrudes from the front side of the gear ring 410 and is fitted onto the positioning platform 420. That is, the guide inner ring 330 protrudes from the front side of the gear ring 410, so that the center of the front side of the gear ring 410 has a position for the positioning platform 420 to be inserted, thereby achieving positioning. The cutter head 400 and the gear ring 410 have corresponding holes for connection and fixation by fasteners. The fitting and cooperation of the positioning platform 420 on the rear side of the cutter head 400 and the gear ring 410 forms a precise positioning structure, which can quickly achieve coaxiality calibration of the cutter head 400 and the gear ring 410, reduce the debugging time during installation, and facilitate the subsequent installation of fasteners after the holes are aligned.

[0050] Reference Figure 3 In some embodiments of this utility model, the connecting plate 320 has a first positioning groove 340 on its front side, and the guide inner ring 330 has a protruding toothed ring 410 on its rear side that is embedded in the first positioning groove 340. The guide inner ring 330 and the connecting plate 320 have corresponding holes for connection and fixation by fasteners. The first positioning groove 340 on the front side of the connecting plate 320 and the embedded engagement of the guide inner ring 330 on its rear side enable quick positioning and installation of the guide inner ring 330, ensuring the relative positional accuracy between the guide inner ring 330 and the connecting plate 320. It also allows for pre-positioning during installation, facilitating the installation of fasteners after hole alignment.

[0051] Reference Figure 2 and Figure 4 In a further embodiment of this utility model, a positioning block 321 is installed on the rear side of the connecting plate 320, and a positioning hole 350 for the positioning block 321 to be inserted is provided on the front side of the sliding frame 300. The positioning block 321 on the rear side of the connecting plate 320 is inserted into the positioning hole 350 on the front side of the sliding frame 300, which can quickly achieve precise docking between the connecting plate 320 and the sliding frame 300, ensuring the installation position accuracy of the connecting plate 320. At the same time, during installation, the holes on the connecting plate 320 can also be aligned with the holes on the sliding frame 300 to facilitate the installation of fasteners.

[0052] Reference Figure 1 and Figure 2 In a further embodiment of this utility model, an extension portion 360 is provided at the front corner of the sliding frame 300 corresponding to the guide shaft 210, and the guide shaft 210 is movably inserted through the extension portion 360. The extension portion 360 at the front corner of the sliding frame 300 extends the mating length between the guide shaft 210 and the sliding frame 300, making the guiding and limiting effect of the guide shaft 210 on the sliding frame 300 more sufficient, and further improving the stability of sliding.

[0053] Reference Figure 1 and Figure 2 In a further embodiment of this utility model, the sliding frame 300 is provided with a through hole 361 that passes through the extended portion 360 and the sliding frame 300. A sliding sleeve 370 is embedded in the through hole 361, and the sliding sleeve 370 is slidably sleeved on the guide shaft 210. Specifically, sliding sleeves 370 are embedded at both ends of the through hole 361 to ensure that the length of the guide engagement is sufficient. A flange plate is provided at the end of the sliding sleeve 370. The flange plate is attached to the outer end wall of the through hole 361 and is connected and fixed by fasteners.

[0054] Reference Figure 1 and Figure 2In a further embodiment of this utility model, guide shafts 210 extending in the front-to-back direction are installed at the four corners of the mounting base 200, and four extension portions 360 are provided and respectively located at the four corners of the sliding frame 300. The guide shafts 210 at the four corners of the mounting base 200 cooperate with the extension portions 360 at the four corners of the sliding frame 300 to form a four-corner guide structure, which constrains the sliding frame 300 from four positions in all directions, making the sliding frame 300 more stable in the sliding process. Adjacent extension portions 360 can be connected and fixed by reinforcing plates 362.

[0055] Reference Figure 1 and Figure 2 In a further embodiment of this utility model, a second slider 380 adapted to the guide rail 110 is installed at the bottom of the extended portion 360 at the bottom corner. The second slider 380 is slidably mounted on the guide rail 110. The sliding engagement between the second slider 380 and the guide rail 110, together with the first slider 310, forms a multi-point supported sliding structure. This not only increases the contact area between the sliding frame 300 and the guide rail 110, distributing the weight and load on the sliding frame 300, and reducing the wear of individual sliders, but also further improves the smoothness of the sliding of the sliding frame 300.

[0056] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test cutter holder for testing a tunneling cutter, characterized in that, include: The base (100) is provided with a guide rail (110) extending in the front-to-back direction; Mounting base (200) is fixedly mounted on base (100), and guide shafts (210) extending in the front-rear direction are mounted on at least the two upper corners; A sliding bracket (300) is located in front of the mounting base (200). The bottom is provided with a first slider (310) that is adapted to the guide rail (110) so that it can slide along the guide rail (110). The upper corner is slidably sleeved on the guide shaft (210). The cutter head (400) is rotatably mounted on the front side of the sliding frame (300); A hob holder (500) is detachably and fixedly installed on the front side of the cutter head (400) and arranged around it. A hob (510) is installed on the hob holder (500). A rotary drive mechanism (600) is mounted on a sliding frame (300) and is connected to the cutter head (400) for driving the cutter head (400) to rotate. A sliding drive mechanism (700) is mounted on a mounting base (200) and is used to drive the sliding frame (300) to slide.

2. The roller rig for testing a tunneling roller cutter according to claim 1, characterized in that, A gear ring (410) is fixedly installed on the rear side of the cutter head (400). The rotating shaft of the rotary drive mechanism (600) is connected to a drive gear (610). The drive gear (610) meshes with the gear ring (410) to drive the gear ring (410) and the cutter head (400) to rotate.

3. The roller rig for testing a tunneling roller cutter according to claim 2, characterized in that, A connecting plate (320) is installed on the front side of the sliding frame (300), and a guide inner ring (330) is installed on the front side of the connecting plate (320). The gear ring (410) is rotatably sleeved on the guide inner ring (330) and axially fixed relative to the guide inner ring (330).

4. The roller rig for testing a tunneling roller cutter according to claim 3, characterized in that, The cutter head (400) has a raised positioning platform (420) on its rear side, and the gear ring (410) has a protruding guide inner ring (330) on its front side and is fitted onto the positioning platform (420). The cutter head (400) and the gear ring (410) have corresponding holes for connection and fixation by fasteners.

5. The roller rig for testing a tunneling roller cutter according to claim 3, wherein The connecting plate (320) has a first positioning groove (340) on its front side, and the guide inner ring (330) protrudes from the toothed ring (410) on its rear side and is embedded in the first positioning groove (340). The guide inner ring (330) and the connecting plate (320) have corresponding holes for connection and fixation by fasteners.

6. The roller rig for testing a tunneling roller cutter according to claim 3, wherein A positioning block (321) is installed on the rear side of the connecting plate (320), and a positioning hole (350) for the positioning block (321) to be inserted is provided on the front side of the sliding frame (300).

7. The test cutter holder for a tunneling cutter according to claim 1, characterized in that, The sliding frame (300) has an extension part (360) at the front corner corresponding to the guide shaft (210), and the guide shaft (210) is movably inserted through the extension part (360).

8. The roller rig for testing a tunneling roller cutter according to claim 7, characterized in that, The sliding frame (300) is provided with a through hole (361) that passes through the extended part (360) and the sliding frame (300). A sliding sleeve (370) is embedded in the through hole (361) and the sliding sleeve (370) is slidably mounted on the guide shaft (210).

9. The test cutter holder for a tunneling cutter according to claim 7, characterized in that The mounting base (200) has guide shafts (210) installed at its four corners, and the extension part (360) has four sections, which are respectively located at the four corners of the sliding frame (300).

10. The cutterhead holder for shield tunneling cutterhead testing according to claim 8, characterized in that, The bottom of the lengthening part (360) of the bottom corner is provided with a second sliding block (380) matched with the guide rail (110), and the second sliding block (380) is slidingly installed on the guide rail (110).

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