A support frame mounting structure for shield tunnel cutterhead testing
By cooperating with the guide rail, slider, and guide shaft, the problems of difficulty in movement and loss of attitude control of the support frame during shield cutterhead testing were solved, achieving stable support and flexible position adjustment, thus improving testing efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY SHISIJU GROUP CORP
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-03
AI Technical Summary
In existing shield tunnel cutterhead testing, the support frame is heavy, difficult to move, loses attitude control, and has inflexible position adjustment, which affects testing efficiency and safety.
The sliding structure, which combines guide rails and sliders, along with the rigid connection between the guide shaft and the abutment, enables stable support and precise position adjustment of the abutment frame.
It improves the operational safety and ease of position adjustment of the support frame, expands the applicability of the testing device, and adapts to the testing needs of hobs of different specifications.
Smart Images
Figure CN224456188U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of shield tunnel cutterhead testing technology, and in particular, to a support frame installation structure for shield tunnel cutterhead testing. Background Technology
[0002] In the field of tunnel boring machine (TBM) construction, the cutterhead is a key component whose performance directly affects construction efficiency and quality. Installed on the head of large construction equipment such as TBMs, the cutterhead breaks up rock at the tunnel face through rolling cutting action. Due to its complex and harsh working environment, it is prone to deformation or fatigue damage after prolonged use, and cutterhead replacement is difficult and costly. Therefore, performance testing of the cutterhead is crucial before it is put into actual use.
[0003] In existing shield tunnel cutterhead testing technology, when the support frame needs to be installed or its position adjusted, the support frame is heavy and bulky, making it difficult to move. Furthermore, it is prone to loss of control or even overturning during movement, severely impacting testing efficiency and safety. In addition, existing support frames lack flexibility in position adjustment, making it difficult to quickly and accurately adjust their position according to different testing needs, thus limiting the adaptability of the testing device. Utility Model Content
[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a support frame mounting structure for shield tunnel cutterhead testing.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A shield cutterhead testing support frame mounting structure includes: a base with a guide rail extending in a front-rear direction, the upper end of the guide rail having a bearing plane; a backrest fixedly connected to the base at its bottom; a guide shaft fixedly installed at the corner of the backrest; a support frame with a slider adapted to the guide rail fixedly installed at its bottom, the slider being mounted on the guide rail and fitting against the bearing plane, the corner of the support frame being sleeved on the guide shaft, and the front side of the support frame being used to install a friction assembly; and a support member located between the backrest and the support frame, one end of the support member being detachably and fixedly connected to the backrest, and the other end being detachably and fixedly connected to the support frame.
[0007] Furthermore, the end of the guide shaft is provided with a coaxial first threaded section, a positioning section and a second threaded section from the outside to the inside. The corner of the backrest is provided with a first through hole adapted to the positioning section. The positioning section passes through the first through hole. A first limiting sleeve is threadedly connected to the first threaded section. A second limiting sleeve is threadedly connected to the second threaded section. The backrest is clamped between the first limiting sleeve and the second limiting sleeve.
[0008] Furthermore, an extension block is provided at the front corner of the abutment frame corresponding to the guide shaft. The extension block is provided with a second through hole that passes through the abutment frame and the extension block from front to back, so that the guide shaft can pass through.
[0009] Furthermore, guide sleeves are embedded at both ends of the second perforation, and the guide sleeves are adapted to the guide shaft; the end of the guide sleeve is provided with an outer expansion plate whose outer circumferential contour is larger than that of the second perforation.
[0010] Furthermore, the guide shafts are arranged in a rectangular pattern and there are four of them. The extension blocks are provided and are correspondingly located at the four corners of the support frame. The upper and lower adjacent extension blocks are connected by reinforcing ribs.
[0011] Furthermore, a mounting plate is connected to the front side of the abutment frame, and positioning strips are installed on the left and right sides of the front side of the mounting plate. The positioning strips and the left and right sides of the mounting plate are provided with corresponding extension block clearance grooves.
[0012] Furthermore, a raised strip is provided at the bottom of the guide rail.
[0013] Furthermore, a tray clearance notch is provided in the middle of the bottom side of the backrest.
[0014] Furthermore, the abutment is provided with connecting end plates at both ends, and the two connecting end plates are respectively attached to the backrest and the abutment frame and fixed by fasteners.
[0015] Furthermore, the guide rails are provided at intervals along the left and right directions.
[0016] This utility model has the following beneficial effects:
[0017] Through the synergistic action of the backrest and the abutment, a continuous and powerful support is provided for the abutment frame during testing. This rigid connection structure effectively resists the forces generated during hobbing tests, preventing displacement or wobbling of the abutment frame. With the sliding cooperation of the guide rail and slider, the abutment frame can move smoothly along the guide rail when no abutment is installed, significantly reducing the difficulty of adjusting the position of the abutment frame during installation. Simultaneously, the corners of the abutment frame fitted onto the guide shaft precisely constrain its movement trajectory, effectively preventing posture deviation or overturning during sliding, thus improving operational safety. By replacing abutment components of different lengths and adjusting the sliding mechanism of the abutment frame, multiple positions of the abutment frame can be quickly fixed without complex modifications to the main structure of the device; it can flexibly adapt to the testing needs of different hobbing cutter specifications, expanding the applicability of the testing device and solving the problems of cumbersome position adjustment and poor adaptability of traditional abutment structures.
[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 overall structure of this utility model;
[0021] Figure 2 yes Figure 1 Another structural diagram from a different perspective;
[0022] Figure 3 yes Figure 1 A schematic diagram of the decomposed state structure;
[0023] Figure 4 This is a schematic diagram of the disassembled structure at the support frame;
[0024] Figure 5 yes Figure 3 A magnified view of point A.
[0025] Legend:
[0026] Base 100, guide rail 110, bearing surface 111, shim 120;
[0027] Backrest 200, first perforation 210, tray clearance notch 220;
[0028] Guide shaft 300, first threaded section 310, first limiting screw sleeve 311, positioning section 320, second threaded section 330, second limiting screw sleeve 331;
[0029] Bracing frame 400, slider 410, extension block 420, second through hole 421, guide sleeve 430, outer expansion plate 431, reinforcing rib plate 440, mounting plate 450, positioning strip 460, clearance groove 470;
[0030] Abutment component 500, connecting end plate 510;
[0031] Friction assembly 600. Detailed Implementation
[0032] 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.
[0033] 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.
[0034] 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.
[0035] 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.
[0036] Please refer to Figure 1 and Figure 2 The present invention provides a support frame installation structure for shield tunnel cutter testing, including a base 100, a backrest 200, a guide shaft 300, a support frame 400, and a support component 500.
[0037] The base 100 is provided with a guide rail 110 extending in the front-to-back direction, and a bearing surface 111 is provided at the upper end of the guide rail 110. The width of the guide rail 110 decreases from the top to the middle and increases from the middle to the bottom, thereby playing a sliding guiding role and also a vertical limiting role.
[0038] The bottom of the backrest 200 is fixedly connected to the base 100. Specifically, the bottom of the backrest 200 is provided with a base plate, and the base plate and the base 100 are provided with corresponding holes for connection and fixation by fasteners.
[0039] The guide shaft 300 is fixedly installed on the corner of the backrest 200.
[0040] A slider 410 adapted to the guide rail 110 is fixedly installed at the bottom of the abutment frame 400. The slider 410 is mounted on the guide rail 110 and fits against the bearing plane 111. The slider 410 has a groove adapted to the guide rail 110. The width of the groove cross-section profile narrows from top to bottom and then widens. The top wall of the groove fits against the bearing plane 111. The corners of the abutment frame 400 are fitted onto the guide shaft 300 so that it can slide along the guide shaft 300. The front side of the abutment frame 400 is used to install the friction assembly 600. The friction assembly 600 is loaded with a concrete block. During the test, the cutter head moves towards the concrete block and eventually makes contact, simulating the tunneling feed of the tunnel boring machine. The concrete block is used to contact the cutter head, simulating the working state of the cutter head. The guide rail 110 of the base 100 and the slider 410 of the support frame 400 form a sliding engagement. The contact between the slider 410 and the bearing surface 111 ensures smooth sliding and disperses pressure through surface contact, preventing the weight of the support frame 400 from concentrating on the guide shaft 300. The constraint of the guide shaft 300 on the support frame 400, combined with the linear guidance of the guide rail 110, forms a multi-dimensional limit, solving the problem of the support frame 400 easily tipping over when moving.
[0041] The abutment 500 is located between the backrest 200 and the abutment frame 400. One end of the abutment 500 is detachably and fixedly connected to the backrest 200, and the other end is detachably and fixedly connected to the abutment frame 400. That is, the abutment 500 is connected and fixed to the backrest 200 and the abutment frame 400 by detachable fasteners.
[0042] This utility model provides a support frame installation structure for shield tunnel cutterhead testing. Through the synergistic action of the backrest 200 and the abutment 500, the support frame 400 can provide continuous and strong support during testing. This rigid connection structure can effectively resist the forces generated during cutterhead testing, preventing displacement or shaking of the support frame 400. With the sliding cooperation of the guide rail 110 and the slider 410, the support frame 400 can move smoothly along the guide rail 110 when the abutment 500 is not installed, significantly reducing the difficulty of adjusting or installing the support frame 400. Simultaneously, the corners of the support frame 400 fitted onto the guide shaft 300 can precisely constrain its movement trajectory, effectively preventing posture deviation or overturning of the support frame 400 during sliding, thus improving operational safety. By replacing the abutment 500 of different lengths and the sliding of the abutment frame 400, the abutment frame 400 can be quickly fixed in multiple positions without complicated modifications to the main structure of the device. It can flexibly adapt to the testing requirements of different specifications of roller cutters, expand the applicability of the testing device, and solve the problems of cumbersome position adjustment and poor adaptability of traditional abutment structures.
[0043] Reference Figure 3In some embodiments of this utility model, the end of the guide shaft 300 is provided with a coaxial first threaded section 310, a positioning section 320 and a second threaded section 330 from the outside to the inside. The diameters of the first threaded section 310, the positioning section 320 and the second threaded section 330 increase sequentially. The backrest 200 is provided with a first through hole 210 that is adapted to the positioning section 320 at its corner. The positioning section 320 passes through the first through hole 210. A first limiting sleeve 311 is threadedly connected to the first threaded section 310. A second limiting sleeve 331 is threadedly connected to the second threaded section 330. The backrest 200 is sandwiched between the first limiting sleeve 311 and the second limiting sleeve 331. The positioning section 320 and the first through hole 210 cooperate to achieve precise alignment. The first limiting sleeve 311 of the first threaded section 310 and the second limiting sleeve 331 of the second threaded section 330 form a bidirectional clamping, which can firmly fix the guide shaft 300 to the backrest 200, preventing the guide shaft 300 from axially moving or shifting under force. This significantly improves the overall rigidity of the connection between the guide shaft 300 and the backrest 200, providing a stable guiding reference for the support frame 400. It is understandable that, in order to support both ends of the guide shaft 300, a vertical frame can be fixedly installed on the base. The vertical frame is located in front of the front end of the guide rail 110. The vertical frame is connected and fixed to the end of the guide shaft 300 away from the backrest 200, thereby achieving support and fixation at both ends of the guide shaft 300, preventing one end of the guide shaft 300 from being suspended and deformed, which would affect the smooth sliding of the support frame 400 when adjusting its position.
[0044] Reference Figures 2 to 4 In a further embodiment of this utility model, an extension block 420 is provided at the front corner of the abutment frame 400 corresponding to the guide shaft 300. The extension block 420 is provided with a second through hole 421 that passes through the abutment frame 400 and the extension block 420 from front to back, allowing the guide shaft 300 to pass through. The extension block 420 extends the mating length between the abutment frame 400 and the guide shaft 300, ensuring the coaxiality of the abutment frame 400 and the guide shaft 300 during front-back movement and improving overall stability.
[0045] Reference Figure 4 In a further embodiment of this utility model, guide sleeves 430 are embedded at both ends of the second through hole 421. The guide sleeves 430 are adapted to the guide shaft 300, that is, the guide sleeves 430 are slidably sleeved on the guide shaft 300. The central hole of the guide sleeve 430 is adapted to the guide shaft 300. The central hole and the guide shaft 300 can be clearance-fitted to ensure smooth sliding. The end of the guide sleeve 430 is provided with an outer expansion plate 431 whose outer circumference is larger than that of the second through hole 421. The outer expansion plate 431 not only realizes the axial positioning of the guide sleeve 430, but also facilitates the processing of connecting holes for connection to the abutment frame 400 and the extension block 420 by fasteners. The guide sleeve 430 and the guide shaft 300 can form a sliding fit to ensure stable sliding guidance.
[0046] In a further embodiment of this utility model, four guide shafts 300 are arranged in a rectangular pattern, and four extension blocks 420 are provided and correspondingly located at the four corners of the abutment frame 400; adjacent extension blocks 420 are connected by reinforcing ribs 440. The four rectangular guide shafts 300 and the corresponding extension blocks 420 cooperate to form a rectangular frame-type guide structure, which constrains the abutment frame 400 from all four corners, making its posture stable during sliding. After the reinforcing ribs 440 connect the adjacent extension blocks 420, they transmit the dispersed guiding force to the overall frame, improving the deformation resistance of the corners of the abutment frame 400, so that the structure can still maintain a stable posture when subjected to impact loads.
[0047] Reference Figure 4 In a further embodiment of this utility model, a mounting plate 450 is connected to the front of the abutment frame 400. Positioning strips 460 are installed on the left and right sides of the front side of the mounting plate 450. A back plate is provided on the rear side of the friction assembly 600. The back plate is embedded between the two positioning strips 460 to achieve positioning, so as to facilitate the subsequent installation of fasteners after the back plate is aligned with the holes of the mounting plate 450. The positioning strips 460 and the left and right sides of the mounting plate 450 are provided with corresponding extension block 420 clearance grooves 470. The mounting plate 450 provides a flat mounting reference surface for the friction assembly 600. The positioning strips 460 can quickly pre-position the friction assembly 600, reducing the calibration time during installation. The clearance grooves 470 cleverly avoid the extension block 420, which not only ensures the installation space of the friction assembly 600, but also does not expand the size of the abutment frame 400 laterally, thus achieving a compact layout of functional components.
[0048] Reference Figure 5 In some embodiments of this utility model, a shim strip 120 is provided at the bottom of the guide rail 110. The shim strip 120 can adjust the height of the guide rail 110 according to testing requirements, and after the guide rail 110 is raised, there is space under the support frame 400 to place a tray to receive the debris falling after being cut by the hobbing cutter, which is convenient for collection and cleaning. The shim strip 120 can be fixed to the base 100 by fasteners or welding, and the guide rail 110 can be fixed to the shim strip 120 by fasteners.
[0049] Reference Figure 2 and Figure 3 In some embodiments of this utility model, a tray clearance notch 220 is provided in the middle of the bottom side of the backrest 200. The tray clearance notch 220 provides space for the tray to receive debris, and the tray can be put into or taken out through the tray clearance notch 220.
[0050] Reference Figure 3In some embodiments of this utility model, the abutment 500 is provided with connecting end plates 510 at both ends. The two connecting end plates 510 are respectively attached to the backrest 200 and the abutment frame 400 and are connected and fixed by fasteners. The connecting end plates 510 increase the contact area between the abutment 500 and the backrest 200 and the abutment frame 400, avoiding structural damage caused by local stress concentration. Specifically, the connecting end plates 510 are fixed to the backrest 200 and the abutment frame 400 by screws, thereby achieving detachable installation and fixing, allowing the abutment 500 to be disassembled and replaced. With abutment 500 of different lengths, the position of the abutment frame 400 can be steplessly adjusted to meet diverse testing needs.
[0051] Reference Figure 3 In some embodiments of this utility model, two guide rails 110 are spaced apart in the left-right direction. The two guide rails 110 spaced apart in the left-right direction cooperate with the corresponding sliders 410 to form a double-rail support structure, which balances the weight of the abutment frame 400 from both sides, reduces the off-center load phenomenon during the sliding process, and makes the movement more precise; the double rails also improve the overall structure's anti-overturning ability.
[0052] 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 back-up frame mounting structure for a test of a shield cutter, characterized by, include: The base (100) is provided with a guide rail (110) extending in the front-rear direction, and the upper end of the guide rail (110) is provided with a bearing plane (111); The backrest (200) is fixedly connected to the base (100) at its bottom; The guide shaft (300) is fixedly installed at the corner of the backrest (200); The abutment frame (400) has a slider (410) adapted to the guide rail (110) fixedly installed at the bottom. The slider (410) is installed on the guide rail (110) and fits against the bearing plane (111). The corners of the abutment frame (400) are sleeved on the guide shaft (300). The front side of the abutment frame (400) is used to install the friction assembly (600). A backing member (500) is located between the backrest (200) and the backing frame (400). One end of the backing member (500) is detachably and fixedly connected to the backrest (200), and the other end is detachably and fixedly connected to the backing frame (400).
2. The abutment mounting structure for a shield cutter test according to claim 1, characterized by, The guide shaft (300) has a first threaded section (310), a positioning section (320), and a second threaded section (330) arranged coaxially from the outside to the inside at its end. The backrest (200) has a first through hole (210) at its corner that is adapted to the positioning section (320). The positioning section (320) passes through the first through hole (210). A first limiting sleeve (311) is threaded onto the first threaded section (310). A second limiting sleeve (331) is threaded onto the second threaded section (330). The backrest (200) is sandwiched between the first limiting sleeve (311) and the second limiting sleeve (331).
3. The abutment mounting structure for a shield cutter test according to claim 1, characterized by, The front corner of the abutment (400) is provided with an extension block (420) corresponding to the guide shaft (300). The extension block (420) is provided with a second through hole (421) that passes through the abutment (400) and the extension block (420) from front to back, so that the guide shaft (300) can pass through.
4. The abutment mounting structure for a shield cutter test according to claim 3, characterized by Guide sleeves (430) are embedded at both ends of the second perforation (421), and the guide sleeves (430) are adapted to the guide shaft (300); the end of the guide sleeve (430) is provided with an outer expansion plate (431) with an outer peripheral contour larger than that of the second perforation (421).
5. The abutment mounting structure for a shield cutter test according to claim 3, characterized by, The guide shafts (300) are arranged in a rectangular shape and there are four of them. The extension blocks (420) are provided and are located at the four corners of the abutment frame (400). The upper and lower adjacent extension blocks (420) are connected by reinforcing ribs (440).
6. The abutment mounting structure for a shield cutter test according to claim 5, characterized by The front of the abutment (400) is connected to a mounting plate (450), and the left and right sides of the front side of the mounting plate (450) are equipped with positioning strips (460). The positioning strips (460) and the left and right sides of the mounting plate (450) are provided with corresponding extension blocks (420) clearance grooves (470).
7. The abutment mounting structure for a shield cutter test according to claim 1, characterized by, The bottom of the guide rail (110) is provided with a shim (120).
8. The shield cutterhead testing support frame mounting structure according to claim 1, characterized in that, The backrest (200) has a tray clearance notch (220) in the middle of its bottom side.
9. The abutment mounting structure for a shield cutter test according to claim 1, characterized by, The abutment (500) has connecting end plates (510) at both ends. The two connecting end plates (510) are respectively attached to the backrest (200) and the abutment frame (400) and are connected and fixed by fasteners.
10. The abutment mounting structure for a shield cutter test according to claim 1, characterized by, The guide rails (110) are arranged in two rows in the left-right direction.