Novel ultra-hard rock shield three-blade hob

Abstract

The utility model belongs to the technical field of shield cutters, and particularly relates to a novel ultra-hard rock shield three-blade hob which comprises a hob body, the hob body comprises a hob shaft and a hob body, the hob body comprises a left cutterhead and a right cutterhead which are designed in a split mode, a first sealing ring is arranged between the left cutterhead and the right cutterhead, and a second sealing ring is arranged between the left cutterhead and the right cutterhead. A first sealing ring is arranged on one side of the left cutterhead, a second sealing ring is arranged on one side of the right cutterhead, a first cutter ring and a second cutter ring are arranged on the left cutterhead in parallel, a third cutter ring is arranged on the right cutterhead, and a plurality of cylindrical rollers are evenly distributed on the periphery of the cutter shaft and abut against and make contact with the inner side face of the left cutterhead and the inner side face of the right cutterhead respectively. A plurality of balls are uniformly distributed on the periphery of the cutter shaft between the two groups of cylindrical rollers, a through hole is formed in the cutter shaft corresponding to the mounting position of the balls, and a plugging rod is arranged in the through hole. The utility model has reasonable design, is convenient to process, improves the bearing capacity, ensures the working progress, ensures the tunneling effect, and meets the use requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield tool technology, in particular to a novel three-edged roller cutter for extremely hard rock shield. Background Art

[0002] Shield construction has become an important technical means for underground infrastructure construction, and its core is the rotating excavation action of the shield cutterhead. There are multiple sets of rollers distributed on the shield cutterhead. The cutterhead provides extrusion force in the forward direction to make the rollers press against the working surface. When the cutterhead actively revolves, the rollers are passively rotated by the extrusion force and friction.

[0003] At present, when the cutterhead is working normally, the distributed roller cutters will rotate and cut the working surface, and the load of the entire cutterhead is evenly distributed. When encountering extremely hard rock formations during excavation, the rock foundation bulges at the intervals of the cutter ring tracks on the shield face. This is because the cracks formed by the roller cutter rolling the rock formation on the face are too small, and the adjacent tracks are not connected, so the rock cannot be effectively broken. Based on the above situation, it is necessary to increase the rolling cracks of the roller cutter ring. Conventional measures to increase the rolling cracks of the roller cutter ring include increasing the roller cutter thrust or reducing the blade thickness. For the former improvement measure, increasing the thrust is to increase the cutting force. The first is to increase the extrusion pressure of the tool on the face, thereby increasing the penetration of the tool and the extrusion cracks formed on the rock surface. However, excessive extrusion pressure can easily cause abnormal damage to the tool and affect the work progress. For the latter improvement measures, the pressure on the face can be increased by reducing the thickness of the cutter ring, which can also increase the penetration of the tool and the extrusion cracks formed on the rock surface. However, the disadvantage is that the thin-blade cutter ring with reduced blade thickness is prone to abnormal damage such as chipping and ring breakage after impact, which increases the investment cost of the workpiece and cannot meet the use requirements well. Utility Model Content

[0004] In view of the technical problems existing in the use of the above-mentioned hob cutter ring, the utility model proposes a new type of extremely hard rock shield three-blade hob with reasonable design, simple structure and convenient processing. On the one hand, the bearing structure in the cutter ring is changed to effectively improve the load-bearing capacity of equipment components and reduce the possibility of damage to the workpiece due to increased thrust, thereby ensuring the working progress. On the other hand, the cutter ring structure of the hob is modified and the distribution position of the cutter ring is optimized to ensure the coordinated use performance of the hobs and the excavation effect, thereby fully meeting the production and processing needs.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is a new type of extremely hard rock shield three-blade roller cutter, including a roller cutter body, the roller cutter body including a cutter shaft and a cutter body, the cutter body including a left cutter disc and a right cutter disc of a split design, a first sealing ring is arranged between the left cutter disc and the right cutter disc, a second sealing ring is arranged on one side of the right cutter disc, a first cutter ring and a second cutter ring are arranged in parallel on the left cutter disc, and a third cutter ring is arranged on the right cutter disc, a plurality of cylindrical rollers are evenly arranged on the outer circumference of the cutter shaft, and are respectively abutted against the inner side surfaces of the left cutter disc and the right cutter disc, a plurality of balls are also evenly arranged on the outer circumference of the cutter shaft between the two groups of the cylindrical rollers, a through hole is opened in the cutter shaft corresponding to the ball installation position, and a sealing rod is arranged in the through hole.

[0006] Preferably, an end cover is provided on one side of the left cutter disc, a third sealing ring is provided between the end cover and the cutter shaft, and a limit plate is provided on one side of the end cover.

[0007] Preferably, an annular groove is provided in one side of the left cutter disc, and an adapter block is provided on one side of the right cutter disc and is adapted and engaged with the annular groove.

[0008] Preferably, the distance between the first cutter ring and the second cutter ring is 60 mm, and the distance between the second cutter ring and the third cutter ring is 120 mm.

[0009] Compared with the prior art, the advantages and positive effects of the utility model are:

[0010] 1. The utility model provides a new type of three-blade roller for extremely hard rock shield. The roller body in this form is arranged in a staggered manner through the first cutter ring, the second cutter ring and the third cutter ring. On the one hand, it ensures the effective implementation of the shield work to adapt to the excavation in different geological environments and ensure the progress of the work. On the other hand, it greatly improves the rock breaking effect of the roller according to the optimized tool arrangement to meet the use requirements. The bearing form of the combination of cylindrical rollers and balls can effectively improve the bearing capacity of the roller body, ensure its wear resistance, ensure the processing progress, and meet the production and processing use requirements. The device is reasonably designed, simple in structure, and easy to process. On the one hand, by changing the bearing structure in the cutter ring, the bearing capacity of the equipment components is effectively improved, the possibility of damage to the workpiece due to increased thrust is reduced, and the work progress is ensured. On the other hand, the cutter ring structure of the roller is modified, and the distribution position of the cutter ring is optimized to ensure the coordinated use performance of the rollers, ensure the excavation effect, and fully meet the production and processing use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0012] Figure 1 This is a schematic diagram of the structure of a new type of three-edged roller cutter for extremely hard rock shield;

[0013] Figure 2 This is a structural front view of a new type of three-edged roller cutter for extremely hard rock shield;

[0014] Figure 3 A top view of the internal structure of a new type of three-edged roller cutter for extremely hard rock shield.

[0015] In the above figures, 1, knife shaft; 1a, through hole; 2, knife body; 21, left knife disc; 211, ring groove; 22, right knife disc; 221, adapter block; 3, first sealing ring; 4, second sealing ring; 5, first knife ring; 6, second knife ring; 7, third knife ring; 8, cylindrical roller; 9, ball; 10, blocking rod; 11, end cover; 12, third sealing ring; 13, limit plate. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0018] Examples, such as Figure 1 to Figure 3As shown, a new type of extremely hard rock shield three-blade hob includes a hob body, and the hob body includes a cutter shaft 1 and a cutter body 2, wherein the cutter body 2 and the cutter shaft 1 are both made of high-quality carburized alloy steel to ensure that they have good wear resistance and bearing capacity to ensure the use effect. Of course, the above are all existing mature and commonly used technical means, and the details are not repeated here; further, the cutter body 2 includes a left cutter disc 21 and a right cutter disc 22 of split design, wherein the left cutter disc 21 and the right cutter disc 22 are engaged and limited and connected to reduce the possibility of their deviation and ensure the use effect; further, the left cutter disc 21 and the right cutter disc 2 2, a first sealing ring 3 is arranged between the left and right cutter discs 21, and a second sealing ring 4 is arranged on one side of the right cutter disc 22, which realizes the sealing treatment of the inside of the roller cutter body, ensuring that it has a good rotation effect and strong functionality; further, the left cutter disc 21 is provided with a first cutter ring 5 and a second cutter ring 6 in parallel, and the right cutter disc 22 is provided with a third cutter ring 7. The establishment of three sets of cutter rings can effectively increase the excavation surface of the roller cutter body, and ensure that it has good functionality and improves the working process; a plurality of cylindrical rollers 8 are evenly arranged on the outer circumference of the cutter shaft 1, and they are respectively against the inner side surfaces of the left cutter disc 21 and the right cutter disc 22 Contact, a plurality of balls 9 are evenly arranged on the outer circumference of the cutter shaft 1 between the two sets of cylindrical rollers 8, which is specifically described as: this design optimizes the bearing structure of the cutter body, and especially adopts a bearing form combining rolling elements and balls 9, which not only ensures that the cutter head has smooth rotation performance and meets the use requirements, but also greatly improves the load-bearing capacity of the workpiece, reduces the possibility of abnormal damage, saves costs, and, after the above optimization, not only ensures the excavation effect and rock breaking efficiency of the workpiece, but also improves its use strength, effectively meeting the use requirements; corresponding to the installation position of the balls 9 A through hole 1a is provided in the cutter shaft 1, and a blocking rod 10 is provided in the through hole 1a. This design provides convenience for placing the ball 9 in the cutter body, and at the same time, it also provides a prerequisite for the replacement of the component. Furthermore, an anti-slip sleeve and a buckle are provided on the outer periphery of the blocking rod 10, which are used to increase the friction effect between the blocking rod 10 and the cutter shaft 1 and reduce the possibility of its deviation on the one hand, and limit its installation position on the other hand. Under the premise of not affecting the operation and use of the cutter body, the ball 9 can also be limited, which greatly improves the rationality of the design of the device and effectively meets the use requirements;

[0019] In the above process: through the establishment of the first cutter ring 5, the second cutter ring 6 and the third cutter ring 7, the cutter bodies in this form are arranged in a staggered manner, on the one hand, to ensure the effective implementation of the shield work, to adapt to the excavation in different geological environments, to ensure the progress of the work, on the other hand, the optimized tool arrangement greatly improves the rock breaking effect of the cutter to meet the use requirements; through the bearing form of the combination of cylindrical rollers 8 and balls 9, the bearing capacity of the cutter body can be effectively improved, and its wear resistance can be guaranteed, the processing progress can be ensured, and the production and processing use requirements can be met; the device is reasonably designed, simple in structure, and easy to process. On the one hand, by changing the bearing structure in the cutter ring, the bearing capacity of the equipment components can be effectively improved, and the possibility of damage to the workpiece due to increased thrust can be reduced to ensure the work progress. On the other hand, the cutter ring structure of the cutter is modified, and the distribution position of the cutter ring is optimized to ensure the coordinated use performance of the cutters, ensure the excavation effect, and fully meet the production and processing use requirements.

[0020] In order to ensure that the roller cutter body has good functionality, an end cover 11 is provided on one side of the left cutter disc 21, a third sealing ring 12 is provided between the end cover 11 and the cutter shaft 1, and a limit plate 13 is provided on one side of the end cover 11. The end cover 11 and the limit plate 13 can be used to limit the installation of the installed left cutter disc 21 and the right cutter disc 22 to ensure the stability of the roller cutter body as a whole and provide convenient conditions for subsequent excavation. The third sealing ring 12 can have a good sealing effect on the interior of the roller cutter body to ensure its smoothness during use and meet the use requirements.

[0021] In order to ensure that the hob body has good connection stability, an annular groove 211 is opened in one side of the left cutter disc 21, and an adapter block 221 is provided on one side of the right cutter disc 22, and is adapted and snap-fitted with the annular groove 211. That is to say, during installation, the cutter shaft 1 is first connected to the left cutter disc 21 and the right cutter disc 22, and then the adapter block 221 is snap-fitted with the annular groove 211 of the left cutter disc 21 correspondingly, so as to ensure the stability of the connection between the two workpieces and reduce the possibility of their deviation, thereby providing convenient conditions for the subsequent convenient use of the hob body and effectively meeting the use requirements.

[0022] In order to further improve the rationality of the establishment of equipment components, the spacing between the first cutter ring 5 and the second cutter ring 6 is 60mm, and the spacing between the second cutter ring 6 and the third cutter ring 7 is 120mm. The specific description is: the hob body provided in this embodiment is arranged in two forms, and the hob body in these two forms can be used alternately. Specifically, with respect to the first form: the spacing between the first cutter ring 5, the second cutter ring 6 and the third cutter ring 7 is as mentioned above, the center of the third cutter ring 7 is 95mm away from the outer side of the right cutter disc 22, and the center of the first cutter ring 5 is 60mm away from the outer side of the left cutter disc 21. The hob body in this form is set at the even-numbered cutter barrel position of the shield equipment. For the first cutter body For the two forms of the hob body: the spacing between the first cutter ring 5 and the second cutter ring 6 is also 60mm, the spacing between the second cutter ring 6 and the third cutter ring 7 is 180mm, the center of the third cutter ring 7 is 65mm away from the outside of the right cutter disc 22, and the center of the first cutter ring 5 is 60mm away from the outside of the left cutter disc 21. The hob body in this form is set at the odd knife barrel position of the shield equipment. Compared with the first form of the hob body, the main thing is to move the setting position of the third cutter ring 7 outward to ensure that the two forms of the hob body are staggered after installation. During subsequent use, the consistency of the intervals between adjacent knife tracks is ensured to ensure the processing progress and meet the use requirements.

[0023] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A new type of extremely hard rock shield three-blade hob, comprising a hob body, wherein the hob body comprises a cutter shaft and a cutter body, characterized in that: The cutter body includes a left cutter disc and a right cutter disc of split design, a first sealing ring is arranged between the left cutter disc and the right cutter disc, a second sealing ring is arranged on one side of the right cutter disc, a first cutter ring and a second cutter ring are arranged in parallel on the left cutter disc, and a third cutter ring is arranged on the right cutter disc, a plurality of cylindrical rollers are evenly arranged on the outer circumference of the cutter shaft, and are respectively abutted against the inner side surfaces of the left cutter disc and the right cutter disc, a plurality of balls are also evenly arranged on the outer circumference of the cutter shaft between the two groups of the cylindrical rollers, a through hole is opened in the cutter shaft corresponding to the ball installation position, and a sealing rod is arranged in the through hole.

2. A new type of extremely hard rock shield three-blade hob according to claim 1, characterized in that: An end cover is arranged on one side of the left cutter disc, a third sealing ring is arranged between the end cover and the cutter shaft, and a limit plate is arranged on one side of the end cover.

3. A new type of extremely hard rock shield three-edge roller cutter according to claim 2, characterized in that: An annular groove is provided in one side of the left cutter disc, and an adapting block is provided on one side of the right cutter disc and is adapted and engaged with the annular groove.

4. A new type of extremely hard rock shield three-edge roller cutter according to claim 3, characterized in that: The distance between the first cutter ring and the second cutter ring is 60 mm, and the distance between the second cutter ring and the third cutter ring is 120 mm.

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