A tunneling machine cutting head anti-loosening device

Abstract

The utility model discloses a kind of tunneling machine cutting head anti-loose device, it is related to tunneling machine cutting head technical field, comprising: protective member and at least one limiting member;Cutting head is connected with main shaft by at least one first bolt, the protective member cover is set on first bolt and is detachably fixed with cutting head;The limiting member is fixed in the side of the protective member close to the cutting head, the head of the first bolt is provided with limiting hole;The utility model covers and shields multiple first bolts by protective plate, limiting member on protective plate is clamped in the limiting hole of first bolt, so that first bolt is stably limited between protective plate and cutting head, effectively prevent the loosening or falling phenomenon that first bolt occurs due to vibration or external force in working process;Meanwhile, the close cooperation of limiting member and limiting hole also ensures that protective plate will not displace relative to first bolt, so as to maintain the stability and reliability of entire anti-loose device.

Description

Technical Field

[0001] This application relates to the field of tunneling machine cutting head technology, and in particular to a tunneling machine cutting head anti-loosening device. Background Technology

[0002] As the core equipment for tunneling in rock tunnels, the connection between the cutting head and the main shaft of the tunnel boring machine is subjected to harsh working conditions of high vibration and strong impact for a long time, which puts forward high requirements for the reliability and anti-loosening performance of the connection structure.

[0003] Currently, the cutting head and main shaft of a tunneling machine are usually connected by bolts, and then the heads of adjacent bolts are tied together and interlocked with wire to restrict the rotation of the bolts.

[0004] During continuous high-intensity cutting operations, the wire is directly exposed to the working environment and is prone to friction and collision with materials such as coal and rocks, causing surface wear or plastic deformation. In severe cases, it may break, causing the bolts to loosen under vibration and impact, affecting the structural stability of the cutting head, and thus threatening the tunneling efficiency and operational safety of the entire machine. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an anti-loosening device for the cutting head of a tunneling machine, which solves the problem that when using wire to fix bolts, the wire is prone to breakage, resulting in poor bolt fixing effect.

[0006] This application provides an anti-loosening device for a tunneling machine cutting head, comprising: a protective component and at least one limiting component; the cutting head is connected to the main shaft via at least one first bolt, the protective component is covered on the first bolt and detachably fixed to the cutting head; the limiting component is fixed on the side of the protective component near the cutting head, and the head of the first bolt has a limiting hole, when the protective component is fixed to the cutting head, the limiting component is engaged in the limiting hole to restrict the rotation of the first bolt.

[0007] In one feasible implementation, both the limiting member and the limiting hole have hexagonal cross-sections.

[0008] In one feasible implementation, the protective component has a triangular cross-section with a side length of 100-200mm.

[0009] In one feasible implementation, the thickness of the protective component is 8-20 mm.

[0010] In one feasible implementation, the protective member is bolted to the cutting head.

[0011] In one feasible implementation, the protective component has a mounting hole, a second bolt is inserted through the mounting hole, and the cutting head has a threaded hole, through which the second bolt is threadedly connected to the cutting head.

[0012] In one feasible implementation, the protective component has a countersunk hole, and the head of the second bolt is disposed in the countersunk hole.

[0013] In one feasible implementation, the number of limiting members is three.

[0014] This utility model provides an anti-loosening device for the cutting head of a tunneling machine, which has the following beneficial effects:

[0015] This invention uses a protective plate to cover and shield multiple first bolts. The limiting member on the protective plate is engaged in the limiting hole of the first bolt, so that the first bolt is firmly restricted between the protective plate and the cutting head, effectively preventing the first bolt from loosening or falling off due to vibration or external force during operation. At the same time, the tight fit between the limiting member and the limiting hole also ensures that the protective plate will not shift relative to the first bolt, thereby maintaining the stability and reliability of the entire anti-loosening device. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the embodiments of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] Figure 1 A schematic diagram of the structure of an anti-loosening device for a tunneling machine cutting head provided in an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the cutting head and the first bolt.

[0019] Figure 3 for Figure 1 A cross-sectional view along the AA direction of a tunneling machine cutting head anti-loosening device provided in this embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of a tunneling machine cutter head anti-loosening device provided in an embodiment of the present utility model when the protective component has a countersunk hole.

[0021] In the diagram: 1. Protective component; 101. Limiting component; 102. Mounting hole; 103. Countersunk hole; 2. Second bolt; 3. Cutting head; 301. Threaded hole; 4. First bolt; 401. Limiting hole. Detailed Implementation

[0022] 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.

[0023] In the following description, 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 technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more, and "at least one" means one or more.

[0024] Furthermore, in this application, directional terms such as "upper," "lower," "inner," and "outer" are defined relative to the indicated placement of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the placement of the components in the accompanying drawings.

[0025] Currently, the cutting head and main shaft of a tunneling machine are usually connected by bolts, and then the heads of adjacent bolts are tied together and interlocked with wire to restrict the rotation of the bolts.

[0026] During continuous high-intensity cutting operations, the wire is directly exposed to the working environment and is prone to friction and collision with materials such as coal and rocks, causing surface wear or plastic deformation. In severe cases, it may break, causing the bolts to loosen under vibration and impact, affecting the structural stability of the cutting head, and thus threatening the tunneling efficiency and operational safety of the entire machine.

[0027] This utility model provides an anti-loosening device for the cutting head of a tunneling machine, which solves the problem that when using wire to fix bolts, the wire is prone to breakage and the bolt fixing effect is poor.

[0028] The embodiments of this application will now be described with reference to the accompanying drawings.

[0029] This application provides an anti-loosening device for the cutting head of a tunneling machine. Please refer to [link / reference]. Figure 1 , Figure 1A schematic diagram of a tunneling machine cutting head anti-loosening device provided for an embodiment of the present utility model includes: a protective component 1 and at least one limiting component 101.

[0030] Please see Figure 2 , Figure 2 This is a schematic diagram of the cutting head and the first bolt.

[0031] The cutting head 3 is connected to the main shaft (not shown in the figure) by at least one first bolt 4; for example, the number of first bolts 4 can be three, and they can be arranged in an approximately triangular shape on the cutting head 3. The cutting head 3 and the main shaft are stably connected by the three first bolts 4. This approximately triangular layout can significantly enhance the stability of the connection and effectively disperse the vibration and impact force generated during the cutting operation.

[0032] Please refer to the following: Figure 1 The protective component 1 is covered on the first bolt 4 and is detachably fixed to the cutting head 3. For example, the protective component 1 can be a wear-resistant plate, which can be made of high-strength and high-wear-resistant alloy material, so that it has good impact resistance and corrosion resistance, and can meet the operating requirements of the tunneling machine under harsh working conditions. The protective component 1 is detachably and fixedly connected to the cutting head 3 during installation. This ensures the firmness of the wear-resistant plate installation and facilitates quick replacement when the wear-resistant plate is worn or damaged, reducing equipment maintenance costs and downtime. In addition, when the protective component 1 is installed on the cutting head 3, it covers the first bolt 4. The shape and size of the wear-resistant plate are matched and designed according to the distribution of the first bolt 4 and the structural characteristics of the cutting head 3 to ensure that it can completely cover the head of the first bolt 4. This effectively protects the first bolt 4 and prevents objects such as coal and rocks from directly contacting the first bolt 4 during operation. This avoids the first bolt 4 from loosening or being damaged due to external impact, thereby ensuring the stability and reliability of the connection between the cutting head 3 and the main shaft, and ensuring the safety and stability of the tunneling machine during operation.

[0033] The limiting member 101 is fixed to the side of the protective member 1 near the cutting head 3. The head of the first bolt 4 has a limiting hole 401. There can be three limiting members 101, corresponding to the number of limiting holes 401 on the three first bolts 4. When the protective member 1 is fixed to the cutting head 3, the limiting member 101 engages in the limiting hole 401 to restrict the rotation of the first bolt 4. For example, the limiting member 101 can be block-shaped and made of a high-hardness material to ensure it is not easily worn during long-term use. It can be fixed to the protective member 1 by welding to ensure the limiting member 1... The stability of the structure between 01 and the protective component 1; when the protective component 1 is installed on the cutting head 3, and the protective component 1 gradually approaches the cutting head 3 and moves to a suitable position, the limiting component 101 will be embedded in the limiting hole 401 of the head of the first bolt 4. Through this locking connection, the rotation of the first bolt 4 can be effectively restricted, and the first bolt 4 can be prevented from loosening due to vibration and other factors during operation. This enhances the stability of the connection between the cutting head 3 and the main shaft. The limiting structure is simple and reliable, with low manufacturing and installation costs, and will not have an adverse effect on the overall structure and performance of the tunneling machine.

[0034] In some embodiments, the cross-sections of the limiting member 101 and the limiting hole 401 can both be hexagonal; the size of the limiting member 101 matches the size of the limiting hole 401; when multiple limiting members 101 are engaged in multiple limiting holes 401, the limiting member 101 can prevent the first bolt 4 from rotating under high-frequency vibration conditions; this hexagonal limiting design can better adapt to the various complex forces and vibrations generated by the tunneling machine cutting head 3 during operation, ensuring that the first bolt 4 always remains stable and will not loosen due to long-term operation and external interference. At the same time, the hexagonal design is also convenient for processing and installation, improving the production efficiency and ease of use of the entire anti-loosening device.

[0035] In some embodiments, the cross-section of the protective component 1 is a triangle with a side length of 100-200mm. The triangular cross-section of the protective component 1 can meet the requirements of covering multiple first bolts 4, avoiding direct contact between the first bolts 4 and materials such as coal and rocks, which would cause wear and loosening, thereby enhancing the stability and reliability of the connection between the cutting head 3 and the main shaft. The side length of the protective component 1 is designed to be 100-200mm, which can ensure the strength of the protective component 1 and avoid material waste and installation inconvenience caused by excessive size.

[0036] In some embodiments, the thickness of the protective component 1 is 8-20mm. The protective component 1 is designed with this thickness range, which can effectively reduce the overall weight while ensuring its own structural strength, and avoid unnecessary burden due to excessive thickness, which would affect the normal operation of the tunneling machine cutting head 3. At the same time, it will not fail to provide good protection due to being too thin, which would make the first bolt 4 susceptible to loosening due to external factors, thus ensuring the stability and reliability of the connection between the cutting head 3 and the main shaft.

[0037] Please see Figure 3 , Figure 3 for Figure 1 A cross-sectional view along the AA direction of a tunneling machine cutting head anti-loosening device provided in an embodiment of this utility model.

[0038] In some embodiments, the protective member 1 is bolted to the cutting head 3. The protective member 1 has a mounting hole 102, through which a second bolt 2 passes. The cutting head 3 has a threaded hole 301, through which the second bolt 2 is threadedly connected to the cutting head 3. During installation, the protective member 1 is placed at a suitable position on the cutting head 3, aligning the mounting hole 102 with the threaded hole 301 on the cutting head 3. Then, the second bolt 2 is passed through the mounting hole 102 and screwed into the threaded hole 301. By tightening the second bolt 2, a stable connection between the protective member 1 and the cutting head 3 is achieved. This connection method ensures that the protective component 1 is securely installed on the cutting head 3. The second bolt 2 engages with the threaded hole 301 on the cutting head 3, achieving a reliable mechanical connection. The position and size of the mounting hole 102 match the threaded hole 301 on the cutting head 3, ensuring the accuracy and convenience of installation. At the same time, the second bolt 2 has strong load-bearing capacity and anti-loosening performance, ensuring that the protective component 1 will not loosen or fall off due to vibration or impact during the operation of the tunneling machine, thereby continuously and effectively protecting the first bolt 4 from the wear and loosening effects of external materials.

[0039] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a tunneling machine cutter head anti-loosening device provided in an embodiment of the present utility model when the protective component has a countersunk hole.

[0040] In some embodiments, the protective member 1 has a countersunk hole 103, and the head of the second bolt 2 is disposed in the countersunk hole 103. The countersunk hole 103 allows the head of the second bolt 2 to be fully embedded in the protective member 1 without protruding from the surface of the protective member 1. This not only makes the entire anti-loosening device look flatter and more aesthetically pleasing, but also prevents the head of the second bolt 2 from interfering with or colliding with other components, further improving the safety and reliability of the device during operation. At the same time, the size of the countersunk hole 103 is closely matched with the size of the head of the second bolt 2, ensuring that the head of the second bolt 2 can be stably placed in the countersunk hole 103 and will not shake or shift due to vibration or other reasons during operation.

[0041] This application uses a protective plate to cover and shield multiple first bolts 4. The limiting member 101 on the protective plate is engaged in the limiting hole 401 of the first bolt 4, so that the first bolt 4 is firmly restricted between the protective plate and the cutting head 3, effectively preventing the first bolt 4 from loosening or falling off due to vibration or external force during operation. At the same time, the tight fit between the limiting member 101 and the limiting hole 401 also ensures that the protective plate will not be displaced relative to the first bolt 4, thereby maintaining the stability and reliability of the entire anti-loosening device.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A loosening prevention device for a cutting head of a tunneling machine, characterized in that include: Protective element (1) and at least one limiting element (101); The cutting head (3) is connected to the main shaft by at least one first bolt (4), and the protective member (1) is covered on the first bolt (4) and is detachably fixed to the cutting head (3); The limiting member (101) is fixed on the side of the protective member (1) near the cutting head (3). The head of the first bolt (4) has a limiting hole (401). When the protective member (1) is fixed on the cutting head (3), the limiting member (101) is engaged in the limiting hole (401) to restrict the rotation of the first bolt (4).

2. The anti-loosening device for a tunneling machine cutting head according to claim 1, characterized in that, Both the limiting member (101) and the limiting hole (401) have hexagonal cross sections.

3. The anti-loosening device for a tunneling machine cutting head according to claim 1, characterized in that, The protective component (1) has a triangular cross-section with a side length of 100-200mm.

4. The anti-loosening device for a tunneling machine cutting head according to claim 1, characterized in that, The thickness of the protective component (1) is 8-20mm.

5. The anti-loosening device for a tunneling machine cutting head according to claim 1, characterized in that, The protective component (1) is bolted to the cutting head (3).

6. A tunnelling machine cutting head anti-loosening device according to claim 5, characterised in that, The protective component (1) has an installation hole (102) and a second bolt (2) is inserted through the installation hole (102). The cutting head (3) has a threaded hole (301) and the second bolt (2) is threadedly connected to the cutting head (3) through the threaded hole (301).

7. The anti-loosening device for a tunneling machine cutting head according to claim 6, characterized in that, The protective component (1) has a countersunk hole (103) and the head of the second bolt (2) is located in the countersunk hole (103).

8. The anti-loosening device for a tunneling machine cutting head according to claim 1, characterized in that, The number of the limiting components (101) is three.

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