Heading machine hob, heading machine cutterhead, heading machine main machine and heading machine

Abstract

The utility model provides a heading machine hob, a heading machine cutterhead, a heading machine main machine and a heading machine, and belongs to the technical field of tunneling equipment. The heading machine hob comprises a bearing inner ring and a bearing outer ring, one of the bearing inner ring and the bearing outer ring is a combined ring, the other one is an integrated ring, an annular protrusion is arranged in the axial middle of the bearing outer ring in a protruding mode, axial raceways are arranged on the two axial side faces of the annular protrusion, and a radial raceway is arranged on the inner circumferential face or the outer circumferential face of the annular protrusion. The combined ring comprises two split rings, one split ring is provided with a radial roller path and an axial roller path at the same time, the other split ring is provided with an axial roller path, and a row of axial rollers are arranged between the axial roller paths on the two sides of the annular protrusion and the two axial roller paths of the combined ring respectively. And at least one row of radial rollers are arranged between the radial raceway of the annular bulge and the radial raceway of the combined ring. The number of the raceways is reduced, the machining efficiency can be improved, meanwhile, the radial raceways on the integrated ring and the combined ring are not separated any more, and the machining difficulty is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a tunnel boring machine cutter, a tunnel boring machine cutter head, a tunnel boring machine main machine and a tunnel boring machine, belonging to the technical field of tunnel boring equipment. Background Art

[0002] The cutters are the "teeth" of a tunnel boring machine (TBM). Conventional cutters typically use double-row tapered roller bearings with integrated outer rings to withstand the loads generated by the cutter ring during rock-breaking. For example, the variable preload cutter disclosed in Chinese Utility Model Patent No. CN220769468U. Because the installation orientation of the side cutters is at an angle to the tunneling direction, the cutter bearings are often subject to combined radial, axial, and overturning moments. Under these combined loads, the end faces of the rolling elements inevitably generate significant contact stress and sliding friction with the inner ring ribs, leading to significant torque generated by the cutter bearings during cutterhead startup. At the same time, when excavating in composite formations, when the cutter head of the tunnel boring machine enters the soft soil formation, the pressure on the cutter ring decreases. When the friction force it receives is not enough to overcome the starting torque of the cutter system itself, the cutter ring will stop, and its force-bearing surface will be continuously rubbed by sand and gravel, causing eccentric wear and damage to the cutter ring. In addition, when the cutter is installed at the edge cutter position with a large inclination angle to the tunnel face, the overturning moment it receives is even greater, which often causes the conventional cutter bearing to have an abnormal load posture, and the friction between the roller end face and the inner ring rib is aggravated, causing the cutter to fail prematurely.

[0003] In this regard, Chinese invention patent application publication number CN102418532A discloses a disc-shaped heavy-duty roller cutter for a hard rock tunnel boring machine. The cutter comprises a cutter shaft, a cutter body, a cutter ring, and two bearing inner rings. The two bearing inner rings are mounted on the cutter shaft, with the cutter body serving as the outer bearing ring. The cutter body is equipped with two radial raceways corresponding to the bearing inner rings. Bearing rollers (referred to as radial rollers) are positioned between the radial raceways and the bearing inner rings. The inner ring of the cutter body is equipped with an annular protrusion extending toward the center. Two bearing inner rings are located axially on either side of the annular protrusion. Thrust bearings (i.e., axial rollers that withstand axial forces) are positioned between the annular protrusion and the bearing inner rings on either side. The cutter body, bearing rollers, bearing inner rings, and thrust bearings form a composite bearing, significantly increasing the cutter's resistance to axial and radial forces.

[0004] However, two radial raceways and two axial raceways need to be machined on the cutter body, and one radial raceway and one axial raceway also need to be machined on each bearing inner ring, for a total of eight raceways. This large number of raceways requires high machining precision, resulting in low machining efficiency. In particular, the radial raceways on the two bearing inner rings are independent, and the two radial raceways on the cutter body are also separated. The machining precision requirements for these radial raceways are even higher to ensure the effective use of the two rows of bearing rollers, which makes the machining process more difficult. Utility Model Content

[0005] The purpose of the present utility model is to provide a roadheader cutter to solve the problems that the existing roadheader requires a large number of raceways to be processed, resulting in low processing efficiency, and the radial raceways on the two bearing inner rings are independent and the two radial raceways on the cutter body are also separated, resulting in higher processing accuracy requirements and greater processing difficulty; the purpose of the present utility model is also to provide a roadheader cutterhead, a roadheader main unit and a roadheader to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the roadheader cutter in the present invention adopts the following technical solutions:

[0007] The roadheader cutter comprises a bearing inner ring and a bearing outer ring serving as a cutter body, wherein one of the bearing outer ring and the bearing inner ring is a combined ring, and the other is an integral ring and has an annular protrusion protruding from the axial middle part, axial raceways are provided on both axial side surfaces of the annular protrusion, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion; the combined ring comprises two split rings, and one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway, or the combined ring comprises three split rings, and one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways; a row of axial rollers is provided respectively between the axial raceways on both sides of the annular protrusion and the two axial raceways of the combined ring, and at least one row of radial rollers is provided between the radial raceway of the annular protrusion and the radial raceway of the combined ring.

[0008] The beneficial effect of the above technical solution is that: the utility model belongs to an invention that changes the relationship between elements, which mainly changes the arrangement position of the radial rollers and the setting position and number of the raceways. Specifically, axial raceways are provided on both axial sides of the annular protrusion of the one-piece ring, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion. In this way, there are three raceways on the one-piece ring, and the axial raceways are located on both sides of the radial raceways, and the radial raceways are arranged in the center; at the same time, the combination ring includes two or three split rings. When the combination ring is two split rings, one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway. In this way, there is only one raceway on one split ring, and the combination ring has a total of three raceways; when the combination ring is three split rings, one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways, that is, each split ring has only one raceway, and the combination ring still has a total of three raceways.

[0009] In summary, the three raceways of the combined ring plus the three raceways of the integral ring create a total of six raceways, similarly implementing the arrangement of two rows of axial rollers and at least one row of radial rollers. However, compared to the prior art arrangement of eight raceways, the present invention reduces the number of raceways by two, thereby improving processing efficiency. Furthermore, the radial raceways on the integral ring are no longer separate and can be machined directly on the inner or outer circumference of the annular protrusion. Similarly, the radial raceways on the combined ring are no longer separate and can be machined directly on a single split ring, significantly reducing processing difficulty.

[0010] Furthermore, the radial rollers are arranged in at least two rows side by side along the axial direction.

[0011] Furthermore, the combination ring includes two split rings, the split ring with both radial raceways and axial raceways being the first split ring, and the other split ring being the second split ring. The first split ring is provided with a stopping step for stopping one axial side of the radial roller, and the second split ring has a stopping end face for stopping the other axial side of the radial roller.

[0012] Furthermore, the combined ring is the outer ring of the bearing, and a cutter ring is installed on the combined ring. The first split ring is also provided with an installation step for stopping one axial side of the cutter ring, and the stopping end face of the second split ring simultaneously stops the other axial side of the cutter ring.

[0013] Furthermore, the combination ring includes two split rings, the split ring with both radial raceway and axial raceway is the first split ring, and the other split ring is the second split ring; the combination ring is the outer ring of the bearing, and a knife ring is installed on the combination ring. The first split ring is provided with an installation step for stopping one axial side of the knife ring, and the second split ring has a stopping end face for stopping the other axial side of the knife ring.

[0014] Furthermore, each axial roller and each radial roller are cylindrical rollers.

[0015] In order to achieve the above-mentioned purpose, the cutter head of the tunnel boring machine in the present invention adopts the following technical solutions:

[0016] The cutterhead of a tunnel boring machine comprises a cutterhead body and a roller cutter mounted on the cutterhead body, the roller cutter comprising a bearing inner ring and a bearing outer ring serving as a cutter body, one of the bearing outer ring and the bearing inner ring being a combined ring, and the other being an integral ring and having an annular protrusion protruding from the axial middle portion, axial raceways being provided on both axial side surfaces of the annular protrusion, and radial raceways being provided on the inner circumference or the outer circumference of the annular protrusion; the combined ring comprises two split rings, one of which is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway, or the combined ring comprises three split rings, one of which is provided with a radial raceway, and the other two split rings are provided with axial raceways; a row of axial rollers is respectively provided between the axial raceways on both sides of the annular protrusion and the two axial raceways of the combined ring, and at least one row of radial rollers is provided between the radial raceway of the annular protrusion and the radial raceway of the combined ring.

[0017] The beneficial effect of the above technical solution is that: the utility model is an improved invention, which makes further restrictions on the structure of the hob. Specifically, axial raceways are provided on both axial side surfaces of the annular protrusion of the one-piece ring, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion. In this way, there are three raceways on the one-piece ring, and the axial raceways are located on both sides of the radial raceways, and the radial raceways are arranged in the center; at the same time, the combination ring includes two or three split rings. When the combination ring is two split rings, one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway. In this way, there is only one raceway on one split ring, and the combination ring has a total of three raceways; when the combination ring is three split rings, one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways, that is, each split ring has only one raceway, and the combination ring still has a total of three raceways.

[0018] In summary, the three raceways of the combined ring plus the three raceways of the integral ring create a total of six raceways, similarly implementing the arrangement of two rows of axial rollers and at least one row of radial rollers. However, compared to the prior art arrangement of eight raceways, the present invention reduces the number of raceways by two, thereby improving processing efficiency. Furthermore, the radial raceways on the integral ring are no longer separate and can be machined directly on the inner or outer circumference of the annular protrusion. Similarly, the radial raceways on the combined ring are no longer separate and can be machined directly on a single split ring, significantly reducing processing difficulty.

[0019] Furthermore, the radial rollers are arranged in at least two rows side by side along the axial direction.

[0020] Furthermore, the combination ring includes two split rings, the split ring with both radial raceways and axial raceways being the first split ring, and the other split ring being the second split ring. The first split ring is provided with a stopping step for stopping one axial side of the radial roller, and the second split ring has a stopping end face for stopping the other axial side of the radial roller.

[0021] Furthermore, the combined ring is the outer ring of the bearing, and a cutter ring is installed on the combined ring. The first split ring is also provided with an installation step for stopping one axial side of the cutter ring, and the stopping end face of the second split ring simultaneously stops the other axial side of the cutter ring.

[0022] Furthermore, the combination ring includes two split rings, the split ring with both radial raceway and axial raceway is the first split ring, and the other split ring is the second split ring; the combination ring is the outer ring of the bearing, and a knife ring is installed on the combination ring. The first split ring is provided with an installation step for stopping one axial side of the knife ring, and the second split ring has a stopping end face for stopping the other axial side of the knife ring.

[0023] Furthermore, each axial roller and each radial roller are cylindrical rollers.

[0024] In order to achieve the above-mentioned purpose, the main machine of the tunnel boring machine in the present invention adopts the following technical solutions:

[0025] The main body of the tunnel boring machine includes a shield body and a cutterhead arranged at the front end of the shield body, the cutterhead includes a cutterhead body and a roller mounted on the cutterhead body, the roller includes a bearing inner ring and a bearing outer ring serving as a cutter body, one of the bearing outer ring and the bearing inner ring is a combined ring, and the other is an integrated ring with an annular protrusion protruding from the axial middle part, axial raceways are provided on both axial side surfaces of the annular protrusion, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion; the combined ring includes two split rings and one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway, or the combined ring includes three split rings and one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways; a row of axial rollers is provided between the axial raceways on both sides of the annular protrusion and the two axial raceways of the combined ring, and at least one row of radial rollers is provided between the radial raceway of the annular protrusion and the radial raceway of the combined ring.

[0026] The beneficial effect of the above technical solution is that: the utility model is an improved invention, which makes further restrictions on the structure of the hob. Specifically, axial raceways are provided on both axial side surfaces of the annular protrusion of the one-piece ring, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion. In this way, there are three raceways on the one-piece ring, and the axial raceways are located on both sides of the radial raceways, and the radial raceways are arranged in the center; at the same time, the combination ring includes two or three split rings. When the combination ring is two split rings, one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway. In this way, there is only one raceway on one split ring, and the combination ring has a total of three raceways; when the combination ring is three split rings, one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways, that is, each split ring has only one raceway, and the combination ring still has a total of three raceways.

[0027] In summary, the three raceways of the combined ring plus the three raceways of the integral ring create a total of six raceways, similarly implementing the arrangement of two rows of axial rollers and at least one row of radial rollers. However, compared to the prior art arrangement of eight raceways, the present invention reduces the number of raceways by two, thereby improving processing efficiency. Furthermore, the radial raceways on the integral ring are no longer separate and can be machined directly on the inner or outer circumference of the annular protrusion. Similarly, the radial raceways on the combined ring are no longer separate and can be machined directly on a single split ring, significantly reducing processing difficulty.

[0028] Furthermore, the radial rollers are arranged in at least two rows side by side along the axial direction.

[0029] Furthermore, the combination ring includes two split rings, the split ring with both radial raceways and axial raceways being the first split ring, and the other split ring being the second split ring. The first split ring is provided with a stopping step for stopping one axial side of the radial roller, and the second split ring has a stopping end face for stopping the other axial side of the radial roller.

[0030] Furthermore, the combined ring is the outer ring of the bearing, and a cutter ring is installed on the combined ring. The first split ring is also provided with an installation step for stopping one axial side of the cutter ring, and the stopping end face of the second split ring simultaneously stops the other axial side of the cutter ring.

[0031] Furthermore, the combination ring includes two split rings, the split ring with both radial raceway and axial raceway is the first split ring, and the other split ring is the second split ring; the combination ring is the outer ring of the bearing, and a knife ring is installed on the combination ring. The first split ring is provided with an installation step for stopping one axial side of the knife ring, and the second split ring has a stopping end face for stopping the other axial side of the knife ring.

[0032] Furthermore, each axial roller and each radial roller are cylindrical rollers.

[0033] In order to achieve the above-mentioned purpose, the tunnel boring machine in the present invention adopts the following technical solutions:

[0034] The tunnel boring machine includes a main machine and rear supporting equipment. The main machine includes a shield body and a cutterhead arranged at the front end of the shield body. The cutterhead includes a cutterhead body and a roller mounted on the cutterhead body. The roller includes a bearing inner ring and a bearing outer ring serving as a cutter body. One of the bearing outer ring and the bearing inner ring is a combined ring, and the other is an integrated ring with an annular protrusion protruding from the axial middle part. Axial raceways are provided on both axial side surfaces of the annular protrusion, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion; the combined ring includes two split rings, and one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway, or the combined ring includes three split rings, and one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways; a row of axial rollers is respectively provided between the axial raceways on both sides of the annular protrusion and the two axial raceways of the combined ring, and at least one row of radial rollers is provided between the radial raceway of the annular protrusion and the radial raceway of the combined ring.

[0035] The beneficial effect of the above technical solution is that: the utility model is an improved invention, which makes further restrictions on the structure of the hob. Specifically, axial raceways are provided on both axial side surfaces of the annular protrusion of the one-piece ring, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion. In this way, there are three raceways on the one-piece ring, and the axial raceways are located on both sides of the radial raceways, and the radial raceways are arranged in the center; at the same time, the combination ring includes two or three split rings. When the combination ring is two split rings, one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway. In this way, there is only one raceway on one split ring, and the combination ring has a total of three raceways; when the combination ring is three split rings, one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways, that is, each split ring has only one raceway, and the combination ring still has a total of three raceways.

[0036] In summary, the three raceways of the combined ring plus the three raceways of the integral ring create a total of six raceways, similarly implementing the arrangement of two rows of axial rollers and at least one row of radial rollers. However, compared to the prior art arrangement of eight raceways, the present invention reduces the number of raceways by two, thereby improving processing efficiency. Furthermore, the radial raceways on the integral ring are no longer separate and can be machined directly on the inner or outer circumference of the annular protrusion. Similarly, the radial raceways on the combined ring are no longer separate and can be machined directly on a single split ring, significantly reducing processing difficulty.

[0037] Furthermore, the radial rollers are arranged in at least two rows side by side along the axial direction.

[0038] Furthermore, the combination ring includes two split rings, the split ring with both radial raceways and axial raceways being the first split ring, and the other split ring being the second split ring. The first split ring is provided with a stopping step for stopping one axial side of the radial roller, and the second split ring has a stopping end face for stopping the other axial side of the radial roller.

[0039] Furthermore, the combined ring is the outer ring of the bearing, and a cutter ring is installed on the combined ring. The first split ring is also provided with an installation step for stopping one axial side of the cutter ring, and the stopping end face of the second split ring simultaneously stops the other axial side of the cutter ring.

[0040] Furthermore, the combination ring includes two split rings, the split ring with both radial raceway and axial raceway is the first split ring, and the other split ring is the second split ring; the combination ring is the outer ring of the bearing, and a knife ring is installed on the combination ring. The first split ring is provided with an installation step for stopping one axial side of the knife ring, and the second split ring has a stopping end face for stopping the other axial side of the knife ring.

[0041] Furthermore, each axial roller and each radial roller are cylindrical rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a cross-sectional view of Example 1 of a roadheader cutter according to the present invention;

[0043] Figure 2 This is a diagram showing the matching structure of the bearing inner ring, bearing outer ring, axial roller and radial roller in Example 1 of the roadheader cutter of the present utility model;

[0044] Figure 3 This is a diagram of the matching structure of the bearing inner ring, bearing outer ring, axial roller and radial roller in Example 2 of the roadheader cutter of the present utility model.

[0045] In the figure: 1. First split ring; 1-1. First axial raceway of inner ring; 1-2. Radial raceway of inner ring; 1-3. Stop step; 1-4. Installation step; 2. Second split ring; 2-1. Second axial raceway of inner ring; 2-2. Stop end face; 3. Integrated ring; 3-1. First axial raceway of outer ring; 3-2. Second axial raceway of outer ring; 3-3. Radial raceway of outer ring; 4. Axial roller; 5. Radial roller; 6. Cutter shaft; 7. Cutter ring; 8. Retaining ring; 9. Sealing assembly; 10. Locking nut; 11. End cover. DETAILED DESCRIPTION

[0046] In response to the technical problems existing in the prior art, the basic concept of the present invention is to change the arrangement position of the radial rollers and the setting position and number of the raceways, and directly use the inner circumference or outer circumference of the annular boss to set the radial raceways, so that the radial raceways on the integral ring and the radial raceways on the combined ring are no longer separated, thereby reducing the number of raceway processing, improving processing efficiency, and reducing processing difficulty.

[0047] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0048] Example 1 of the roadheader cutter in the utility model:

[0049] like Figure 1 As shown, the roadheader cutter includes a cutter shaft 6, a cutter ring 7, a retaining ring 8, a sealing assembly 9, a locking nut 10, an end cover 11, and a cutter bearing. The cutter bearing includes an inner bearing ring and an outer bearing ring as a cutter body. In this embodiment, the inner bearing ring is a combined ring, and the combined ring includes two split rings, one of which is provided with both a radial raceway and an axial raceway, and the other is provided with an axial raceway. Figure 2 As shown, the two split rings are the first split ring 1 and the second split ring 2. The first split ring 1 is provided with both the inner ring first axial raceway 1-1 and the inner ring radial raceway 1-2, which are arranged perpendicularly. The second split ring 2 is provided with the inner ring second axial raceway 2-1, which is parallel to and opposite to the inner ring first axial raceway 1-1.

[0050] The bearing outer ring is a one-piece ring 3. An annular protrusion extends inward from its axial center. Axial raceways are located on either side of the protrusion. These raceways are the outer ring's first axial raceway 3-1 and the outer ring's second axial raceway 3-2. These raceways are parallel to the inner ring's second axial raceway 2-1 and the inner ring's first axial raceway 1-1. The inner circumference of the annular protrusion is equipped with an outer ring radial raceway 3-3. Radial rollers 5 are arranged in two axially aligned rows between the outer ring radial raceway 3-3 and the inner ring radial raceway 1-2. A row of axial rollers 4 is located between the outer ring's first axial raceway 3-1 and the inner ring's first axial raceway 1-1, and between the outer ring's second axial raceway 3-2 and the inner ring's second axial raceway 2-1, respectively.

[0051] Therefore, the integral ring 3 has three raceways, and the two split rings have three raceways combined, for a total of six raceways for the entire hob bearing. This arrangement also achieves two rows of axial rollers 4 and two rows of radial rollers 5. However, compared to the prior art arrangement of eight raceways, the present invention eliminates two raceways, improving processing efficiency. Furthermore, the radial raceways on the integral ring 3 are no longer separate and can be machined directly on the inner circumference of the annular protrusion. Similarly, the radial raceways on the combined rings are no longer separate and can be machined directly on a single split ring, significantly reducing processing difficulty.

[0052] Each axial roller 4 and each radial roller 5 is a cylindrical roller. The axis of the axial roller 4 is perpendicular to the axis of the cutter shaft 6 and primarily bears axial forces. The axis of the radial roller 5 is parallel to the axis of the cutter shaft 6 and primarily bears radial forces. The raceways corresponding to the axial rollers 4 are flat, while the raceways corresponding to the radial rollers 5 are cylindrical, making machining easier.

[0053] In addition, in order to facilitate the positioning of the radial roller 5, as shown in FIG. Figure 2 As shown, a stopping step 1 - 3 for stopping one axial side of the radial roller 5 is provided on the first split ring 1 , and the second split ring 2 has a stopping end face 2 - 2 for stopping the other axial side of the radial roller 5 .

[0054] In addition, a sealing assembly 9 and an end cover 11 are respectively provided on both axial sides of the hob cutter bearing to achieve dustproof sealing on both sides of the hob cutter bearing. Figure 1 As shown, the cutter ring 7 is mounted on the outside of the integral ring 3. The integral ring 3 is provided with a mounting step for stopping one axial side of the cutter ring 7. The other axial side of the cutter ring 7 is stopped by the retaining ring 8 to achieve positioning of the cutter ring 7.

[0055] When assembling the roadheader cutter of the utility model, Figure 1 As shown, first install the end cap 11 and sealing assembly 9 on the left side, use the shoulder and outer diameter of the cutter shaft 6 to position the end cap 11, then install the first split ring 1, the first row of axial rollers 4, the integrated ring 3, the two rows of radial rollers 5, the second row of axial rollers 4, the second split ring 2, the sealing assembly 9 and the end cap 11 on the right side from right to left, and finally install the locking nut 10. The locking nut 10 is threadedly connected to the cutter shaft 6. Tighten the locking nut 10 so that it squeezes the end cap 11 on the right side to complete the axial locking of each part. Finally, install the cutter ring 7 on the integrated ring 3 and fix the cutter ring 7 axially with the retaining ring 8. Of course, the cutter ring 7 can also be installed in advance and then installed together with the integrated ring 3.

[0056] After the cutter is assembled, the cutter bearing can simultaneously withstand axial loads, radial loads, and overturning moments. This ensures that there is no sliding friction between the relative rotating parts of the cutter when the cutter is subjected to force in any direction, ensuring the flexible operation of the cutter ring 7 during rock breaking and excavation, and significantly reducing the cutter's starting torque and rotational torque. Furthermore, two rows of axial rollers and two rows of radial rollers are provided to withstand axial loads and overturning moments, improving the cutter's anti-overturning capability and significantly increasing its adaptability to all geological conditions and tool positions. Furthermore, compared to traditional double-row tapered roller cutter bearings, the raceways used in this utility model are both flat and cylindrical, making machining easier. There is no need to adjust the bearing preload during assembly, significantly improving assembly efficiency.

[0057] Embodiment 2 of the roadheader cutter in the present utility model:

[0058] like Figure 3 As shown, unlike Example 1, the combined ring consisting of the first split ring 1 and the second split ring 2 in this embodiment is the bearing outer ring, and the integrated ring 3 is the bearing inner ring. The cutter ring is mounted on the combined ring, so the first split ring 1 is provided with mounting steps 1-4 for stopping the cutter ring on one axial side, while the second split ring 2 has a stop end surface 2-2 for stopping the cutter ring on the other axial side.

[0059] Apart from this, the remaining configuration is similar to that of Example 1. For example, in this embodiment, an annular protrusion is provided outwardly from the axial center of the integral ring 3. The outer circumference of the annular protrusion is provided with a radial raceway, and axial raceways are provided on both axial side surfaces of the annular protrusion. The first split ring 1 is provided with both radial and axial raceways, while the second split ring 2 is provided with only one axial raceway. A row of axial rollers 4 is provided between the axial raceway on one side of the annular protrusion and the axial raceway of the first split ring 1. Another row of axial rollers 4 is provided between the axial raceway on the other side of the annular protrusion and the axial raceway of the second split ring 2. Two rows of radial rollers 5 are provided between the radial raceway of the annular protrusion and the radial raceway of the first split ring 1. The axial roller 4 and the radial roller 5 are also cylindrical rollers, and similarly, a stopping step is provided on the first split ring 1 for stopping one axial side of the radial roller 5, and at the same time, the stopping end face 2-2 of the second split ring 2 stops the other axial side of the radial roller, that is, the stopping end face 2-2 of the second split ring 2 in this embodiment has two functions.

[0060] In other embodiments of the roadheader cutter, each axial roller and each radial roller may be a ball, and in this case, the corresponding axial raceway and radial raceway are both arc-shaped raceways.

[0061] In other embodiments of the roadheader cutter: Different from Example 2, the axial end face of the second split ring only serves to stop the radial roller, but not the cutter ring. In this case, a retaining ring needs to be installed on the first split ring to position the cutter ring.

[0062] In other embodiments of the roadheader cutter, a stopping step may not be provided on the first split ring to stop one axial side of the radial roller, and the end face of the second split ring may not be used to stop the other axial side of the radial roller. Instead, two additional retaining rings may be installed on the first split ring to achieve axial limitation on both sides of the radial roller.

[0063] In other embodiments of the roadheader cutter, the radial rollers may be arranged in only one row, or three or more rows as required.

[0064] In other embodiments of the roadheader cutter disc, the combined ring may include three separate rings. In this case, one of the separate rings is provided with radial raceways, and the other two separate rings are provided with axial raceways. In this case, a row of axial rollers is provided between the axial raceways on either side of the annular protrusion and the axial raceways of the two separate rings, and at least one row of radial rollers is provided between the radial raceway of the annular protrusion and the radial raceway of one of the separate rings. In this case, each separate ring has only one raceway, and the combined ring still has three raceways. Together with the three raceways on the integral ring, the total number of raceways is six. This also reduces the number of raceways by two compared to the eight raceways in the prior art, thereby improving processing efficiency.

[0065] The embodiment of the tunnel boring machine cutterhead in the present invention is as follows: the tunnel boring machine cutterhead comprises a cutterhead body and a roller cutter mounted on the cutterhead body. The specific structure of the roller cutter is the same as any of the above roller cutter embodiments and will not be repeated here.

[0066] The embodiment of the tunnel boring machine main body in the present utility model is as follows: the tunnel boring machine main body includes a shield body and a cutterhead arranged at the front end of the shield body, the cutterhead includes a cutterhead body and a roller installed on the cutterhead body, and the specific structure of the roller is the same as any of the above-mentioned roller embodiments, which will not be repeated here.

[0067] An embodiment of a tunnel boring machine in the present invention is as follows: the tunnel boring machine includes a main machine and rear supporting equipment, the main machine includes a shield body and a cutterhead arranged at the front end of the shield body, the cutterhead includes a cutterhead body and a roller installed on the cutterhead body, and the specific structure of the roller is the same as any of the above-mentioned roller embodiments, and will not be repeated here.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. The cutter of the tunnel boring machine is characterized by: It includes a bearing inner ring and a bearing outer ring serving as a cutter body, one of the bearing outer ring and the bearing inner ring is a combined ring, and the other is an integrated ring with an annular protrusion protruding from the axial middle part, axial raceways are provided on both axial side surfaces of the annular protrusion, and radial raceways are provided on the inner circumference or outer circumference of the annular protrusion; the combined ring includes two split rings and one of the split rings is provided with both radial raceways and axial raceways, and the other split ring is provided with an axial raceway, or the combined ring includes three split rings and one of the split rings is provided with a radial raceway, and the other two split rings are provided with axial raceways; a row of axial rollers is provided between the axial raceways on both sides of the annular protrusion and the two axial raceways of the combined ring, and at least one row of radial rollers is provided between the radial raceway of the annular protrusion and the radial raceway of the combined ring.

2. The roadheader cutter according to claim 1, characterized in that: The radial rollers are arranged in at least two rows side by side along the axial direction.

3. The roadheader cutter according to claim 1 or 2, characterized in that: The combination ring includes two split rings. The split ring with both radial raceway and axial raceway is the first split ring, and the other split ring is the second split ring. The first split ring is provided with a stopping step for stopping one axial side of the radial roller, and the second split ring has a stopping end face for stopping the other axial side of the radial roller.

4. The roadheader cutter according to claim 3, characterized in that: The combined ring is the outer ring of the bearing, and a cutter ring is installed on the combined ring. The first split ring is also provided with an installation step for stopping one axial side of the cutter ring, and the stopping end face of the second split ring simultaneously stops the other axial side of the cutter ring.

5. The roadheader cutter according to claim 1 or 2, characterized in that: The combination ring includes two split rings, the split ring with both radial raceway and axial raceway is the first split ring, and the other split ring is the second split ring; the combination ring is the outer ring of the bearing, and a cutter ring is installed on the combination ring. The first split ring is provided with an installation step for stopping one axial side of the cutter ring, and the second split ring has a stopping end face for stopping the other axial side of the cutter ring.

6. The roadheader cutter according to claim 1 or 2, characterized in that: Each axial roller and each radial roller are cylindrical rollers.

7. A tunnel boring machine cutterhead, comprising a cutterhead body and a roller cutter mounted on the cutterhead body, characterized in that: The roller cutter is the roadheader roller cutter according to any one of claims 1 to 6.

8. The main machine of the tunnel boring machine comprises a shield body and a cutterhead arranged at the front end of the shield body, wherein the cutterhead comprises a cutterhead body and a roller cutter mounted on the cutterhead body, wherein: The roller cutter is the roadheader roller cutter according to any one of claims 1 to 6.

9. A tunnel boring machine comprising a main engine and supporting equipment, wherein the main engine comprises a shield and a cutterhead disposed at the front end of the shield, wherein the cutterhead comprises a cutterhead body and a roller cutter mounted on the cutterhead body, wherein: The roller cutter is the roadheader roller cutter according to any one of claims 1 to 6.

Images