A new type of wheel set structure based on a segment arc surface

Abstract

The application discloses a new type of wheel set structure based on segment arc surface counterweight adjustment, relates to the technical field of the new type of wheel set structure based on segment arc surface counterweight adjustment, and comprises an upper wheel frame. The shape of the upper wheel frame is T-shaped. A central support shaft is fixedly installed at the lower part of the upper wheel frame. Walking supports are rotationally arranged on the left side and the right side of the central support shaft. Rollers are installed on the ends, away from the central support shaft, of the walking supports through bearings. An elastic support structure is arranged between the upper part of the upper wheel frame and the upper part of the upper wheel frame. A lower module is fixedly installed on the upper surface of the upper wheel frame. The device structure can realize smooth movement of the inner wall of a shield segment, obstacle adjustment and guiding effect, two walking supports are separately elastically supported, the obstacle passing rate under the floating condition of the segment can be improved, stable steering movement can be effectively realized, the smoothness of the movement of the whole structural device is achieved, and the on-site construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of new wheelset structures for counterweight adjustment based on the arc surface of tunnel segments, and particularly to a new wheelset structure for counterweight adjustment based on the arc surface of tunnel segments. Background Technology

[0002] With the vigorous development of my country's infrastructure industry, tunnel boring machines (TBMs) are widely used in highway, water conservancy, subway, and railway engineering projects. It is estimated that by 2022, the total length of subway, highway, and railway tunnels in my country will exceed 10,000 kilometers, of which medium- and long tunnels and extra-long tunnels will account for about two-thirds. The application of TBMs in tunnel engineering, particularly the attitude control of TBMs during downhill excavation, is becoming increasingly challenging.

[0003] When a tunnel boring machine (TBM) is excavating downhill, its posture is at a significant angle, and the loads acting on it differ from those in a horizontal state, making it prone to posture problems. Furthermore, the TBM's "top-heavy" position increases the risk of head-down (or "nose-knocking"), especially under conditions of soft, uneven, or fractured and unstable strata. Therefore, designing a novel, mobile, and adjustable device is crucial, making research on TBM posture problems and adjustment technologies of significant importance.

[0004] This invention addresses the issue of shield head-up during tunneling in soft rock or uneven strata where the shield head-up amount cannot offset the head-down amount during downtime, or is less than the head-down amount, resulting in shield head-down. A novel wheelset structure based on the arc surface of the tunnel segments is designed to address this problem. This device enables smooth movement within the inner wall of the shield segments, provides obstacle adjustment and guidance, and effectively regulates segment buoyancy, thus assisting in adjusting shield head-down. Summary of the Invention

[0005] The purpose of this invention is to provide a novel wheelset structure based on the arc surface of the tube segment for counterweight adjustment in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] A novel wheel assembly structure based on the arc surface of a tunnel segment for counterweight adjustment includes an upper wheel frame in the shape of a "T". A central support shaft is fixedly installed at the lower part of the upper wheel frame. Traveling brackets are rotatably mounted on the left and right sides of the central support shaft. A roller is mounted on the end of the traveling bracket away from the central support shaft via a bearing. An elastic support structure is provided between the upper part of the upper wheel frame and the upper part of the upper wheel frame. A lower module is fixedly installed on the upper surface of the upper wheel frame. The lower module consists of two discs, one smaller than the other, with the upper surface of the upper disc being a convex spherical surface. An upper module is positioned above the lower module, with the lower surface of the upper module corresponding to the upper surface of the lower module being a concave spherical surface. A vertically penetrating positioning hole is provided between the lower and upper modules, and a positioning post is inserted into the positioning hole. A limiting ring is provided at the lower end of the positioning post, and the limiting ring is secured below the lower module. The upper surface of the upper module and the upper end of the positioning post are fixedly mounted on a traveling device.

[0008] Preferably, the elastic support structure includes a telescopic column fixedly installed on the upper surface of the walking bracket and a telescopic sleeve fixedly installed on the upper wheel frame. The telescopic column is inserted into the telescopic sleeve, and a telescopic spring is sleeved on the telescopic column at a position below the telescopic sleeve. The lower end of the telescopic spring is fixedly connected to the walking bracket, and the upper end of the telescopic spring is fixedly connected to the telescopic sleeve.

[0009] Preferably, four limiting blocks are evenly spaced along the edge of the lower disk of the lower module, and the limiting blocks abut against the side of the upper disk of the lower module and the side of the upper module.

[0010] Preferably, the lower edge contour of the roller is arc-shaped and fits into the arc surface of the same tube segment.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] This invention enables smooth movement within the inner wall of the tunnel lining segment, as well as obstacle adjustment and guidance. Simultaneously, the use of two independent elastic supports improves obstacle clearance in floating segment scenarios and effectively achieves stable turning motion, ensuring smooth movement of the entire structural device and improving on-site construction efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a three-dimensional structural schematic diagram of a novel wheelset structure based on the arc surface of a tube segment, as described in this invention.

[0015] Figure 2 This is a three-dimensional structural diagram of a novel wheelset structure based on the arc surface of a pipe segment, as described in this invention, from a bottom perspective.

[0016] Figure 3 This is an exploded view of the structure of a novel wheelset structure based on the arc surface of a tube segment, as described in this invention.

[0017] The annotations in the attached figures are explained as follows:

[0018] 1. Upper wheel frame; 2. Walking support; 3. Roller; 4. Central support shaft; 5. Elastic support structure; 6. Upper module; 7. Lower module; 8. Positioning hole; 9. Limiting block; 10. Roller arc surface; 11. Positioning post. Detailed Implementation

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood through the specific circumstances.

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figures 1-3As shown, a novel wheelset structure based on the arc surface of a pipe segment for counterweight adjustment includes an upper wheel frame 1, which is T-shaped. A central support shaft 4 is fixedly installed at the lower part of the upper wheel frame 1. Traveling brackets 2 are rotatably mounted on the left and right sides of the central support shaft 4. A roller 3 is mounted on the end of the traveling bracket 2 away from the central support shaft 4 via a bearing. An elastic support structure 5 is provided between the upper part of the upper wheel frame 1 and the upper part of the upper wheel frame 1. A lower module 7 is fixedly installed on the upper surface of the upper wheel frame 1. The lower module 7 consists of two discs, one smaller than the other, with the upper surface of the upper disc being a convex spherical surface. An upper module 6 is provided above the lower module 7, with the lower surface of the upper module 6 corresponding to the upper surface of the lower module 7 being a concave spherical surface, ensuring the coaxiality of the upper module 6 and the lower module 7 and making the rotation more stable. A vertically penetrating positioning hole 8 is provided in the middle of the lower module 7 and the upper module 6. A positioning post 11 is inserted into the positioning hole 8, and a limiting ring is provided at the lower end of the positioning post 11. The limiting ring is locked below the lower module 7 to realize the upper module The tensioning structure of the upper module 6 and the lower module 7 support is fixedly installed on the upper surface of the upper module 6 and the upper end of the positioning column 11 on the walking device; the elastic support structure 5 includes a telescopic column fixedly installed on the upper surface of the walking support 2 and a telescopic sleeve fixedly installed on the upper wheel frame 1. The telescopic column is inserted into the telescopic sleeve, and the telescopic column and the telescopic sleeve are fitted with a clearance to ensure that the telescopic column is not jammed by the telescopic sleeve when the walking support 2 rotates around the central support shaft 4. A telescopic spring is sleeved on the telescopic column at the position below the telescopic sleeve corresponding to the telescopic column. The lower end of the telescopic spring is fixedly connected to the walking support 2, and the upper end of the telescopic spring is fixedly connected to the telescopic sleeve; four limit blocks 9 are evenly spaced along the edge of the lower disc of the lower module 7. The limit blocks 9 press against the side of the upper disc of the lower module 7 and the side of the upper module 6 to strengthen the limit support, reduce the shear force between the upper module 6 and the lower module 7 on the positioning column 11, and ensure smooth rotation; the lower edge contour of the roller 3 is arc-shaped and fits against the arc surface of the same tube segment. The roller 3 has a large support surface and is more stable under force.

[0023] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A novel wheelset structure for counterweight adjustment based on the arc surface of a tunnel segment, comprising an upper wheel frame (1), characterized in that: The upper wheel frame (1) is T-shaped. A central support shaft (4) is fixedly installed on the lower part of the upper wheel frame (1). Traveling brackets (2) are rotatably installed on the left and right sides of the central support shaft (4). A roller (3) is installed on the end of the traveling bracket (2) away from the central support shaft (4) through a bearing. An elastic support structure (5) is provided between the upper part of the traveling bracket (2) and the upper part of the upper wheel frame (1). A lower module (7) is fixedly installed on the upper surface of the upper wheel frame (1). The lower module (7) consists of two discs, one smaller than the other. The upper surface of the disc is set as a convex spherical surface; an upper module (6) is set above the lower module (7), and the lower surface of the upper module (6) is set as a concave spherical surface corresponding to the upper surface of the lower module (7). A positioning hole (8) is opened in the middle of the lower module (7) and the upper module (6), and a positioning post (11) is inserted in the positioning hole (8). A limiting ring is set at the lower end of the positioning post (11), and the limiting ring is stuck below the lower module (7). The upper surface of the upper module (6) and the upper end of the positioning post (11) are fixedly installed on the walking device.

2. The novel wheelset structure for counterweight adjustment based on the arc surface of a tunnel segment according to claim 1, characterized in that: The elastic support structure (5) includes a telescopic column fixedly installed on the upper surface of the walking bracket (2) and a telescopic sleeve fixedly installed on the upper wheel frame (1). The telescopic column is inserted into the telescopic sleeve, and a telescopic spring is sleeved on the telescopic column at the position below the telescopic sleeve. The lower end of the telescopic spring is fixedly connected to the walking bracket (2), and the upper end of the telescopic spring is fixedly connected to the telescopic sleeve.

3. The novel wheelset structure for counterweight adjustment based on the arc surface of a tunnel segment according to claim 1, characterized in that: Four limiting blocks (9) are evenly spaced along the edge of the lower disk of the lower module (7), and the limiting blocks (9) abut against the side of the upper disk of the lower module (7) and the side of the upper module (6).

4. The novel wheelset structure for counterweight adjustment based on the arc surface of a tunnel segment according to claim 1, characterized in that: The lower edge contour of the roller (3) is arc-shaped and fits into the arc surface of the tube segment.

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