Jig for embedding alloy teeth in multi-blade disc cutter shell of raise boring machine

Abstract

The utility model provides a multi-blade disc cutter shell alloy tooth embedding jig of a raise boring machine. Comprising a fixed shaft, a shell end cover, a thrust bearing, a bearing end cover I, a sliding bearing, a bearing sleeve, a bearing end cover II and a nut, the shell end cover is assembled on the fixed shaft to block the end face of the hob shell of the raise boring machine; the sliding bearing is assembled on the fixed shaft and is used for enabling the hob shell of the raise boring machine to rotate around the fixed shaft so as to carry out alloy tooth embedding operation; the bearing sleeve is inserted into the sliding bearing; the bearing end cover I and the bearing end cover II are sleeved on the fixed shaft and are in threaded connection with the bearing sleeve through bolts to plug the two end parts of the sliding bearing and the bearing sleeve; a group of thrust bearings are assembled on the fixed shaft; the nut is in threaded connection with the fixing shaft, the thrust bearing abuts against the bearing end cover I, and the raise boring machine hob shell is axially fastened. The sliding bearing is clamped between the two thrust bearings to be assembled on the fixing shaft, the raise boring machine hob shell is fixed in a cantilever mode, and the raise boring machine hob shell can rotate along with the sliding bearing.

Description

Technical Field

[0001] The utility model relates to a multi-edged disc-shaped hob in the field of a raise boring machine, in particular to an alloy tooth fixture inlaid in a shell of a multi-edged disc-shaped hob of a raise boring machine. Background Art

[0002] Raise boring machine is a highly efficient equipment used for drilling holes in underground projects. It can penetrate wells or tunnels underground by drilling holes. Its working principle is that the motor of the drilling rig drives the hydraulic motor, the hydraulic motor drives the faucet, and uses hydraulic power to transmit torque to the drilling tool system, driving the drill rod and drill bit to rotate. Under the action of drilling pressure, the rollers on the pilot drill bit or reaming drill bit do pure rolling or slight sliding along the rock working surface at the bottom of the well.

[0003] The construction process of the raise boring machine mainly includes two steps: pilot hole drilling and expansion drilling. First, the pilot hole is drilled forward, and then the hole is expanded in the reverse direction. This technology not only improves construction efficiency, but also reduces construction costs and risks.

[0004] The cutter of the raise boring machine is one of its core components, mainly used for rock breaking and hole enlargement. There are various types of cutters, including single-edge disc cutters, multi-edge disc cutters (with teeth on the blade) and edgeless cutters (with teeth on the cone surface of the cutter body). These cutters can be selected and replaced according to different rock conditions to improve drilling efficiency and well completion quality.

[0005] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application:

[0006] In the working process of the raise boring machine, the multi-edge disc cutter is one of the most important components, which can break the rock and help the drill bit to move forward smoothly. In order to improve the rock breaking efficiency and the life of the cutter during drilling, alloy teeth are embedded in the shell of the multi-edge disc cutter. Made of cemented carbide material, it has high wear resistance and compressive strength and is suitable for rocks of different hardness. The alloy teeth are arranged in a circle and pressed into the pre-drilled embedding holes on the shell by a press. Therefore, during the process of inserting teeth in the multi-edge disc cutter, the shell needs to be rotated frequently, and it needs to be axially positioned to prevent displacement during the insertion of teeth. Summary of the invention

[0007] In order to solve the deficiencies in the prior art, the utility model provides a jig for embedding alloy teeth in the multi-blade disc hob of a raise boring machine in order to solve the problem that the housing is frequently rotated during the process of embedding teeth in the multi-blade disc hob of a raise boring machine, and no axial displacement is required. The jig is assembled on a fixed shaft by clamping a sliding bearing between two thrust bearings, and the housing of the raise boring machine hob is cantilevered, solving the technical problem that the housing is frequently rotated and axial displacement occurs when the multi-blade disc hob of a raise boring machine is embedded with alloy teeth.

[0008] The solution adopted by the utility model to solve the technical problem is:

[0009] A multi-blade disc-shaped hob housing inlaid with alloy teeth jig for a raise boring machine comprises a fixed shaft, a housing end cover, a thrust bearing, a bearing end cover I, a sliding bearing, a bearing sleeve, a bearing end cover II and a nut;

[0010] The fixed shaft is used to suspend the shell of the raise boring machine cutter; the shell end cover is assembled on the fixed shaft and used to block the end face of the shell of the raise boring machine cutter; the sliding bearing is assembled on the fixed shaft and used for the shell of the raise boring machine cutter to rotate around the fixed shaft and to embed the alloy teeth; the bearing sleeve is inserted on the sliding bearing to protect the inner cavity of the shell of the raise boring machine cutter; the bearing end cover I is mounted on the fixed shaft and is screwed with the bearing sleeve by bolts to block one end of the sliding bearing and the bearing sleeve; the bearing end cover II is mounted on the fixed shaft and is screwed with the bearing sleeve by bolts to block the other end of the sliding bearing and the bearing sleeve; the thrust bearing is assembled on the fixed shaft as a group, wherein one is assembled between the shell end cover and the bearing end cover II, and the other is assembled on the outside of the bearing end cover I; the nut is screwed with the fixed shaft to press the thrust bearing against the bearing end cover I to axially tighten the shell of the raise boring machine cutter;

[0011] Among them, the sliding bearing is clamped between the two thrust bearings and assembled on the fixed shaft, and the roller housing of the raise boring machine is cantilevered. The roller housing of the raise boring machine can rotate with the sliding bearing, and the thrust bearing can limit the axial position of the roller housing of the raise boring machine.

[0012] In order to further solve the technical problem to be solved by the utility model, in the fixed shaft provided by the utility model, one end of the fixed shaft is connected to the press, the roller cutter housing of the raise boring machine is assembled thereon and fixed in a cantilever manner; the fixed shaft includes a main shaft, a shoulder, an external thread and a connecting portion; the fixed shaft is a stepped threaded shaft, a shoulder is provided on the fixed shaft, one end of the shoulder is the main shaft for assembling thrust bearings and sliding bearings, and the end of the main shaft is provided with an external thread for threading with a nut; a connecting portion is provided at the other end of the shoulder, and an internal thread is provided axially on the connecting portion for connecting the fixed shaft to the press.

[0013] Further, the shell end cover is an annular structure, including a shell end cover boss, a shell end cover inner hole and a through hole;

[0014] A housing end cover boss is provided at one end of the housing end cover, and the center hole of the housing end cover boss corresponds to the main shaft of the fixed shaft, so that the housing end cover can be mounted on the main shaft, and the end of the housing end cover boss is used to squeeze the thrust bearing; a housing end cover inner hole is provided at the other end of the housing end cover, and the housing end cover inner hole corresponds to the shaft shoulder of the fixed shaft and receives it therein; when the housing end cover is assembled on the shaft shoulder, an axial retaining ring is formed to limit the thrust bearing. Through holes are evenly distributed on the housing end cover for connection with the press.

[0015] Furthermore, the bearing end cover II is a stepped annular structure, including a bearing end cover boss, a bearing end cover inner hole and a bolt through hole;

[0016] A bearing end cover inner hole is provided at one end of the bearing end cover II, and the bearing end cover inner hole is used to embed the thrust bearing; a bearing end cover boss is provided at the other end of the bearing end cover II, and the bearing end cover boss can be assembled in the inner cavity of the raise boring rig cutter housing to clamp the bearing sleeve and the sliding bearing in position and seal the end face of the raise boring rig cutter housing at the same time; bolt through holes are also evenly distributed on the bearing end cover II, and bolts pass through the bolt through holes to connect the bearing end cover II to the bearing sleeve, thereby axially locking and fixing the raise boring rig cutter housing.

[0017] Positive effects: The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0018] 1. Since the embodiment of the present application adopts a technical means of arranging a sliding bearing, two sets of thrust bearings and a nut on a fixed shaft, when the axial direction of the raise boring machine cutter housing is locked by the nut, the thrust bearings are arranged at the front and rear ends to ensure that the axial direction of the raise boring machine cutter housing does not move, and the rotation of the raise boring machine cutter housing is not affected; the technical problem of the raise boring machine cutter housing rotating and axially displacing when the alloy teeth are embedded in the prior art is effectively solved, thereby achieving the technical effect that the raise boring machine cutter housing does not undergo axial displacement and rotates more easily.

[0019] 2. Since the fixed shaft is provided with a shaft shoulder and a connecting portion, the fixed shaft can be connected to the press through the connecting portion to form a cantilever fixation; at the same time, the fixed shaft is equipped with a thrust bearing and a sliding bearing, and the axial position is limited, thereby preventing the axial displacement of the roller housing of the raise boring machine during rotation.

[0020] The utility model is suitable for use as a jig for inlaying alloy teeth on a multi-edge disc-shaped hob shell of a raise boring machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is an exploded diagram of the structure of this embodiment;

[0023] Figure 2 This is the southeast isometric view of this embodiment;

[0024] Figure 3 This is the southwest isometric view of this embodiment;

[0025] Figure 4 This is the front view of the present embodiment;

[0026] Figure 5 This is a front cross-sectional view of this embodiment;

[0027] Figure 6 It is a right view of this embodiment;

[0028] Figure 7 It is a left view of this embodiment;

[0029] Figure 8 It is a fixed axis southeast isometric drawing;

[0030] Fig. 9 It is the southwest isometric view of the shell end cover;

[0031] Fig.10 This is the southeast isometric view of the shell end cover;

[0032] Fig.11 This is the southwest isometric view of the bearing end cover II;

[0033] Fig.12 This is the southeast isometric view of the bearing end cover II.

[0034] In the figure:

[0035] 0. Raise boring machine cutter housing;

[0036] 1. Fixed axis,

[0037] 11. spindle, 12. shaft shoulder, 13. external thread, 14. connecting part;

[0038] 2. Shell end cover,

[0039] 21. Shell end cover boss,

[0040] 22. Inner hole of shell end cover,

[0041] 23.Through hole;

[0042] 3.Thrust bearing;

[0043] 4. Bearing end cover Ⅰ;

[0044] 5. Sliding bearings;

[0045] 6. Bearing sleeve;

[0046] 7. Bearing end cover II,

[0047] 71. Bearing end cover boss,

[0048] 72. Inner hole of bearing end cover,

[0049] 73. Bolt through hole;

[0050] 8. Nuts;

[0051] 9. Bolts. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the utility model.

[0053] The embodiment of the present application provides a jig for embedding alloy teeth in the multi-blade disc-shaped hob shell of the raise boring machine, which solves the problem of frequent rotation of the shell and axial displacement when the multi-blade disc-shaped hob shell of the raise boring machine is embedded with alloy teeth in the prior art. In the jig, two thrust bearings 3 are used to clamp the sliding bearing 5 in the middle and assemble it on the fixed shaft 1, so that the raise boring machine hob shell 0 is cantilevered and fixed, so that the raise boring machine hob shell 0 rotates with the sliding bearing 5, and the thrust bearing 3 limits the raise boring machine hob shell 0.

[0054] According to the attached Figures 1 to 7 As shown, a multi-blade disc-shaped hob housing inlaid with alloy teeth jig for a raise boring machine comprises a fixed shaft 1, a housing end cover 2, a thrust bearing 3, a bearing end cover I4, a sliding bearing 5, a bearing sleeve 6, a bearing end cover II7 and a nut 8;

[0055] The fixed shaft 1 is used to suspend the raise boring machine cutter housing 0;

[0056] The housing end cover 2 is assembled on the fixed shaft 1 and is used to seal the end surface of the raise boring machine cutter housing 0;

[0057] The sliding bearing 5 is assembled on the fixed shaft 1, and is used for the roller cutter housing 0 of the raise boring machine to rotate around the fixed shaft 1 to perform the alloy gear embedding operation;

[0058] The bearing sleeve 6 is inserted on the sliding bearing 5 to protect the inner cavity of the raise boring machine cutter housing 0 and avoid damaging the surface and affecting the assembly of the raise boring machine multi-edge disc cutter;

[0059] The bearing end cover Ⅰ4 is sleeved on the fixed shaft 1 and is screwed to the bearing sleeve 6 through bolts 9 to seal the sliding bearing 5 and one end of the bearing sleeve 6;

[0060] The bearing end cover II 7 is sleeved on the fixed shaft 1 and is screwed to the bearing sleeve 6 by bolts 9 to seal the other end of the sliding bearing 5 and the bearing sleeve 6;

[0061] The thrust bearing 3 is assembled on the fixed shaft 1 as a group, wherein one is assembled between the housing end cover 2 and the bearing end cover II7, and the other is assembled on the outside of the bearing end cover I4;

[0062] The nut 8 is threadedly connected to the fixed shaft 1, and the thrust bearing 3 is pressed against the bearing end cover Ⅰ4, and the raise boring machine cutter housing 0 is axially fastened;

[0063] Among them, the sliding bearing 5 is clamped between the two thrust bearings 3 and assembled on the fixed shaft 1, and the raise boring machine cutter housing 0 is cantilevered. The raise boring machine cutter housing 0 can rotate with the sliding bearing 5, and the thrust bearing 3 can axially limit the raise boring machine cutter housing 0; when the thrust bearing 3 is axially locked by the nut 8, the raise boring machine cutter housing 0 does not move axially and does not affect the rotation of the raise boring machine cutter housing 0, thereby ensuring that when the raise boring machine cutter housing 0 works on the press, the raise boring machine cutter housing 0 does not undergo axial displacement and can rotate easily, thereby realizing the operation of embedding alloy teeth.

[0064] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0065] Since the fixed shaft 1 is provided with a sliding bearing 5, two sets of thrust bearings 3 and a nut 8, the sliding bearing 5 makes it easier for the raise boring machine cutter housing 0 to rotate; when the axial direction of the raise boring machine cutter housing 0 is locked by the nut 8, the thrust bearings 3 are provided at the front and rear ends, so that the axial direction of the raise boring machine cutter housing 0 does not move, and the rotation of the raise boring machine cutter housing 0 is not affected; thus, the raise boring machine cutter housing 0 is more convenient to rotate when the alloy teeth are embedded, and it is ensured that the raise boring machine cutter housing 0 does not have axial displacement when the press is working.

[0066] In order to ensure the stability of the structure of this embodiment, see the attached Figure 8, one end of the fixed shaft 1 is connected to the press, the raise boring machine cutter housing 0 is assembled thereon and fixed in a cantilevered manner; the fixed shaft 1 includes a main shaft 11, a shoulder 12, an external thread 13 and a connecting portion 14; the fixed shaft 1 is a stepped thread shaft, a shoulder 12 is provided on the fixed shaft 1, one end of the shoulder 12 is the main shaft 11, which is used to assemble the thrust bearing 3 and the sliding bearing 5, and the end of the main shaft 11 is provided with an external thread 13 for screwing with the nut 8; the other end of the shoulder 12 is provided with a connecting portion 14 for connecting the fixed shaft 1 to the press. In this embodiment, the connecting portion 14 is axially provided with an internal thread, which is screwed with the press.

[0067] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0068] Since the fixed shaft 1 is provided with a shaft shoulder 12 and a connecting portion 14, the fixed shaft 1 can be connected to the press through the connecting portion 14 to form a cantilever fixation; at the same time, the fixed shaft 1 is equipped with a thrust bearing 3 and a sliding bearing 5, and the axial position is limited, so as to avoid axial displacement of the raise boring machine cutter housing 0 during rotation.

[0069] In order to further ensure the stability of the structure of this embodiment, see the attached Figures 9-10 The shell end cover 2 is an annular structure, including a shell end cover boss 21, a shell end cover inner hole 22 and a through hole 23;

[0070] A shell end cover boss 21 is provided at one end of the shell end cover 2, and the center hole of the shell end cover boss 21 corresponds to the main shaft 11 of the fixed shaft 1, so that the shell end cover 2 can be mounted on the main shaft 11, and the end of the shell end cover boss 21 is used to extrude the thrust bearing 3; a shell end cover inner hole 22 is provided at the other end of the shell end cover 2, and the shell end cover inner hole 22 corresponds to the shaft shoulder 12 of the fixed shaft 1 and accommodates it therein; when the shell end cover 2 is assembled on the shaft shoulder 12, an axial retaining ring is formed to limit the thrust bearing 3; through holes 23 are evenly distributed on the shell end cover 2 for connecting with a press.

[0071] In order to optimize the structure of this embodiment, the diameter of the housing end cover boss 21 is smaller than the diameter of the thrust bearing 3 , so that the housing end cover boss 21 is lower than the thrust bearing 3 , forming a space for assembling the bolts 9 .

[0072] In order to further optimize the structure of this embodiment, see the attached Figures 11-12 , the bearing end cover II 7 is a stepped annular structure, including a bearing end cover boss 71, a bearing end cover inner hole 72 and a bolt through hole 73;

[0073] A bearing end cover inner hole 72 is provided at one end of the bearing end cover II7, and the bearing end cover inner hole 72 is used to embed the thrust bearing 3; a bearing end cover boss 71 is provided at the other end of the bearing end cover II7, and the bearing end cover boss 71 can be assembled in the inner cavity of the raise boring machine cutter housing 0, clamping and positioning the bearing sleeve 6 and the sliding bearing 5, and at the same time blocking the end face of the raise boring machine cutter housing 0; bolt through holes 73 are also evenly distributed on the bearing end cover II7, and the bolts 9 pass through the bolt through holes 73 to connect the bearing end cover II7 to the bearing sleeve 6, thereby axially locking and fixing the raise boring machine cutter housing 0.

[0074] In this embodiment, the bearing end cover I4 is a planar annular structure, which is arranged opposite to the bearing end cover II7; bolt through holes 73 are evenly distributed on the bearing end cover I4, and the bolts 9 pass through the bolt through holes 73 to connect the bearing end cover I4 to the bearing sleeve 6, while sealing the end face of the reverse drilling rig cutter housing 0.

[0075] In order to further optimize the structure of this embodiment, internal threads are provided at both ends of the bearing sleeve 6 for threaded connection with the bearing end cover I4 and the bearing end cover II7.

[0076] As a conventional technical option, the sliding bearing 5 is a radial sliding bearing made of bronze or cast iron.

[0077] The working process of this embodiment:

[0078] First, the fixed shaft 1 is installed on the press platform through the internal thread of the connecting portion 14, the housing end cover 2 is assembled on the shaft shoulder 12 of the fixed shaft 1, and is installed on the press through the bolt assembly passing through the bolt hole 23;

[0079] Secondly, a set of thrust bearings 3 is assembled on the main shaft 11 of the fixed shaft 1 and leans against the side of the housing end cover boss 21 of the housing end cover 2;

[0080] Next, the sliding bearing 5 and the bearing sleeve 6 are embedded in the raise boring machine cutter housing 0, wherein the bearing end cover II 7 is fastened to one end of the bearing sleeve 6 by bolts 9, and the sliding bearing 5 is pressed into the other end of the bearing sleeve 6, and is installed into one side of the inner cavity of the raise boring machine cutter housing 0; the bearing end cover I4 is installed into the other side of the inner cavity of the raise boring machine cutter housing 0, and the bearing end cover I4 is fastened to the other end of the bearing sleeve 6 by bolts 9, and then the bearing end cover II 7 and the bearing end cover I4 are respectively matched with the stepped platform of the inner cavity of the raise boring machine cutter housing 0, and the sliding bearing 5 with the inserted bearing sleeve 6 is fixed in the inner cavity of the raise boring machine cutter housing 0;

[0081] Next, the raise boring machine cutter housing 0 inlaid with the sliding bearing 5 and the bearing sleeve 6 is assembled on the main shaft 11 of the fixed shaft 1, and the bearing end cover inner hole 72 of the bearing end cover II 7 accommodates the thrust bearing 3; another set of thrust bearings 3 is assembled on the main shaft 11 of the fixed shaft 1, and is made to lean against the outer side of the bearing end cover I 4;

[0082] Finally, the two sets of thrust bearings 3 are axially locked and fixed to the raise boring machine cutter housing 0 by using the nut 8 in cooperation with the external thread 13 of the fixed shaft 1; when the raise boring machine cutter housing 0 rotates around the fixed shaft 1, the raise boring machine cutter housing 0 has no axial displacement, thereby realizing the operation of embedding alloy teeth on the raise boring machine cutter.

[0083] It is worth noting that the contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of the thrust bearing 3 and the sliding bearing 5 are not specifically limited, and conventional technical selection can be used. In this technical solution, the raised borer cutter not mentioned belongs to the prior art, so it is not shown in the figure and will not be described here.

[0084] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A multi-edged disc-shaped hob housing inlaid with alloy teeth jig for a raise boring machine, characterized by: include: A fixed shaft (1), the fixed shaft (1) being used for hanging a roller cutter housing (0) of a raise boring machine; A housing end cover (2), the housing end cover (2) being mounted on the fixed shaft (1) and used to seal the end surface of the raise boring machine cutter housing (0); A sliding bearing (5), the sliding bearing (5) being mounted on the fixed shaft (1) and used for the roller cutter housing (0) of the raise boring machine to rotate around the fixed shaft (1) to perform an alloy tooth embedding operation; A bearing sleeve (6), the bearing sleeve (6) being inserted into the sliding bearing (5) to protect the inner cavity of the roller cutter housing (0) of the raise boring machine; A bearing end cover I (4), the bearing end cover I (4) being sleeved on the fixed shaft (1) and being threadedly connected to the bearing sleeve (6) via bolts (9) to seal the sliding bearing (5) and one end of the bearing sleeve (6); A bearing end cover II (7), the bearing end cover II (7) being sleeved on the fixed shaft (1) and being screwed to the bearing sleeve (6) via the bolts (9) to seal the other end of the sliding bearing (5) and the bearing sleeve (6); A thrust bearing (3), wherein the thrust bearing (3) is assembled on the fixed shaft (1) in a group, wherein one is assembled between the housing end cover (2) and the bearing end cover II (7), and the other is assembled on the outside of the bearing end cover I (4); and A nut (8), wherein the nut (8) is threadedly connected to the fixed shaft (1), so as to place the thrust bearing (3) against the bearing end cover I (4), thereby axially fastening the raise boring machine cutter housing (0); The sliding bearing (5) is clamped between the two thrust bearings (3) and assembled on the fixed shaft (1), so that the raise boring machine cutter housing (0) is cantilevered and fixed; the raise boring machine cutter housing (0) can rotate along with the sliding bearing (5), and the thrust bearing (3) can limit the axial position of the raise boring machine cutter housing (0).

2. According to claim 1, a multi-edged disc-shaped hob housing inlaid with alloy teeth jig for a raise boring machine is characterized by: One end of the fixed shaft (1) is connected to a press, and the raise boring machine cutter housing (0) is mounted thereon and fixed in a cantilevered manner; the fixed shaft (1) comprises a main shaft (11), a shaft shoulder (12), an external thread (13) and a connecting portion (14); The fixed shaft (1) is a stepped threaded shaft. The fixed shaft (1) is provided with a shaft shoulder (12). One end of the shaft shoulder (12) is the main shaft (11) for assembling the thrust bearing (3) and the sliding bearing (5). The end of the main shaft (11) is provided with an external thread (13) for threading with the nut (8). The other end of the shaft shoulder (12) is provided with a connecting portion (14). The connecting portion (14) is axially provided with an internal thread for connecting the fixed shaft (1) to a press.

3. The multi-edged disc-shaped hob housing inlaid with alloy teeth jig according to claim 2, characterized in that: The shell end cover (2) is an annular structure, comprising a shell end cover boss (21), a shell end cover inner hole (22) and a through hole (23); The housing end cover boss (21) is provided at one end of the housing end cover (2), the center hole of the housing end cover boss (21) corresponds to the main shaft (11) of the fixed shaft (1), and the housing end cover (2) can be mounted on the main shaft (11), and the end of the housing end cover boss (21) is used to squeeze the thrust bearing (3); the housing end cover inner hole (22) is provided at the other end of the housing end cover (2), the housing end cover inner hole (22) corresponds to the shaft shoulder (12) of the fixed shaft (1) and accommodates it therein; when the housing end cover (2) is assembled on the shaft shoulder (12), an axial retaining ring is formed to limit the thrust bearing (3); the through holes (23) are evenly distributed on the housing end cover (2) for connection with a press.

4. The multi-edged disc-shaped hob housing inlaid with alloy teeth jig according to claim 3, characterized in that: The diameter of the housing end cover boss (21) is smaller than the diameter of the thrust bearing (3), so that the housing end cover boss (21) is lower than the thrust bearing (3), forming a space for assembling the bolt (9).

5. The multi-edged disc-shaped hob housing inlaid with alloy teeth jig according to claim 1, characterized in that: The bearing end cover II (7) is a stepped annular structure, comprising a bearing end cover boss (71), a bearing end cover inner hole (72) and a bolt through hole (73); The bearing end cover inner hole (72) is provided at one end of the bearing end cover II (7), and the bearing end cover inner hole (72) is used to embed the thrust bearing (3); the bearing end cover boss (71) is provided at the other end of the bearing end cover II (7), and the bearing end cover boss (71) can be assembled in the inner cavity of the raise boring machine cutter housing (0) to clamp and position the bearing sleeve (6) and the sliding bearing (5), and at the same time seal the end surface of the raise boring machine cutter housing (0); the bearing end cover II (7) is also evenly distributed with bolt through holes (73), and the bolts (9) pass through the bolt through holes (73) to connect the bearing end cover II (7) to the bearing sleeve (6), thereby axially locking and fixing the raise boring machine cutter housing (0).

6. The multi-edged disc-shaped hob housing inlaid with alloy teeth jig according to claim 5, characterized in that: The bearing end cover I (4) is a planar annular structure and is arranged opposite to the bearing end cover II (7); the bolt through holes (73) are evenly distributed on the bearing end cover I (4); the bolts (9) pass through the bolt through holes (73) to connect the bearing end cover I (4) to the bearing sleeve (6), while sealing the end surface of the raise boring machine cutter housing (0).

7. The multi-edged disc-shaped hob housing inlaid with alloy teeth jig according to claim 1, characterized in that: Both ends of the bearing sleeve (6) are provided with internal threads for threaded connection with the bearing end cover I (4) and the bearing end cover II (7).

8. The multi-edged disc-shaped hob housing inlaid with alloy teeth jig according to claim 1, characterized in that: The sliding bearing (5) is a radial sliding bearing and is made of bronze.

9. The multi-edged disc-shaped hob housing inlaid with alloy teeth jig according to claim 1, characterized in that: The sliding bearing (5) is a radial sliding bearing and is made of cast iron.

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