Axial interference shaft

Abstract

The axial interference shaft comprises a mandrel, a carbon fiber sleeve, an upper opening clamping hoop, a lower opening clamping hoop, a right-angle connector and a stretching mechanism. One end of the core shaft is arranged in the stretching mechanism, the end, located in the stretching mechanism, of the core shaft is connected with the first connector, one end of the core shaft penetrates through the stretching mechanism and then is arranged in the carbon fiber sleeve, one end of the carbon fiber sleeve is attached to the stretching mechanism, and the other end of the carbon fiber sleeve is matched with the opening upper and lower clamp in a clamped mode; a first threaded hole is formed in the end, close to the stretching mechanism, of the mandrel, an inner hole is formed in the mandrel, the inner hole and the first threaded hole are communicated and located on the same transverse axis, a third threaded hole is formed in the end, away from the stretching mechanism, of the mandrel, and a right-angle connector is arranged in the third threaded hole in a threaded fit mode. The mandrel is not prone to generating relative displacement with the carbon fiber sleeve when the temperature changes.

Description

Technical Field

[0001] The invention relates to an improvement of a shaft processing technology, belongs to the field of mechanical processing, and particularly relates to an axial interference shaft. Background Art

[0002] Maritime cranes are lifting equipment specially designed for ships or offshore facilities. They usually need to work under strict environmental conditions, including strong winds, waves and changeable climatic conditions. The side beams of maritime cranes have extremely high requirements on weight and bending resistance. In order to improve its bending resistance within the specified weight range, a carbon fiber sleeve is added to the periphery. In actual use, due to temperature changes and different linear expansion coefficients of materials, the core shaft expands and contracts, resulting in relative displacement between the core shaft of the maritime crane side beam and the carbon fiber sleeve, thus forming a weak point, affecting the bending resistance and overall safety of the side beam.

[0003] A Chinese patent application with application number CN201711041011.4 and application date October 21, 2017 discloses an interference fit shaft and hole assembly device, including a support platform, a plurality of guide rods are fixed on the support platform, an upper frame is fixed on the upper end of the guide rods, a slide is installed on the guide rods, a hydraulic jack is provided between the slide and the frame, the hydraulic jack can drive the slide to move close to the plane of the support platform, when in use, the pipe sleeve can be placed on the support platform, and then the shaft is inserted into the pipe sleeve, the hydraulic jack is started, and the shaft is inserted into the pipe sleeve using the hydraulic jack to realize the assembly of the interference fit shaft and the hole, but the above scheme does not solve the problem that the core shaft is prone to relative displacement with the carbon fiber sleeve under temperature changes.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem in the prior art that the core shaft is prone to relative displacement with the carbon fiber sleeve under temperature changes, and to provide an axial interference fit shaft in which the core shaft is not prone to relative displacement with the carbon fiber sleeve under temperature changes.

[0006] To achieve the above objectives, the technical solution of the present invention is: an axial interference shaft, the axial interference shaft comprising a core shaft, a carbon fiber sleeve, upper and lower clamps at the mouth, a right-angle joint and a stretching mechanism; One end of the mandrel is arranged in the stretching mechanism, one end of the mandrel located in the stretching mechanism is connected to the first joint, one end of the mandrel passes through the stretching mechanism and is arranged in the carbon fiber sleeve, one end of the carbon fiber sleeve is fitted with the stretching mechanism, and the other end of the carbon fiber sleeve is clamped with the upper and lower clamps of the mouth; A first threaded hole is formed at one end of the mandrel close to the stretching mechanism, an internal hole is formed in the mandrel, the internal hole is connected to the first threaded hole and is located on the same transverse axis, a third threaded hole is formed at one end of the mandrel away from the stretching mechanism, and a right-angle joint is matched with the inner thread of the third threaded hole; The stretching mechanism includes a base, a stretching piece, an adapter seat, and a connecting plate. A stud is transversely arranged in the base, one end of the stud passes through the side of the base and a stretching piece is arranged, the other end of the stud is connected to one end of the adapter seat, and the other end of the adapter seat is connected to one end of the core shaft through multiple sets of bolts, and upper and lower gaskets are arranged on the side of the connecting plate; The stud is coaxially arranged with the core shaft.

[0007] The core shaft includes a connecting end and a shaft body, one end of the connecting end is connected to the other end of the adapter, and the other end of the connecting end is connected to one end of the shaft body; One end of the shaft body passes through the connecting plate; The distance between one end of the shaft body close to the connecting plate and the end faces of the upper and lower clamps of the mouth is less than the length of the carbon fiber sleeve.

[0008] The base comprises a convex plate, a circular inner plate and a side plate, wherein the top of the convex plate is embedded with a circular inner plate with an opening facing right, and the top of the convex plate is located on the outer side of the circular inner plate and is surrounded by a side plate; A through hole is opened on the right side of the side plate, and the through hole is communicated with the inner cavity of the circular inner plate.

[0009] A connecting plate is provided between the right side of the top of the convex plate and the right side of the side plate, and the connecting plate is provided corresponding to the through opening; The connecting plate is connected to the convex plate and the side plate by multiple sets of fixing bolts; The circular inner plate is hollow.

[0010] The adapter seat includes a seat body and a mounting plate, the left end of the seat body is connected to the right end of the mounting plate, the other end of the stud passes through the mounting plate and is connected to the mounting plate by a bolt, and the right end of the seat body is connected to one end of the connecting end; There is a gap between the stud and the seat body.

[0011] The stretching member comprises a disc spring assembly and a pressure sensor. The disc spring assembly is sleeved on the outer side of the stud, and the disc spring assembly is connected to the pressure sensor.

[0012] The disc spring assembly includes a sleeve, eight sets of disc springs and a nut. A second threaded hole is opened on the side of the sleeve, and a stud is inserted through the second threaded hole. The outer periphery of the stud is located on the left side of the sleeve and is threadedly matched with a nut. Eight groups of disc springs are arranged on the outer periphery of the sleeve, and the disc spring on the far right is connected to the pressure sensor.

[0013] A conical washer is embedded on the left side of the side plate, and the conical washer is connected to the spherical washer by bolts; The spherical gasket is located between the pressure sensor and the side plate.

[0014] A fixing seat is installed at one end of the carbon fiber sleeve close to the connecting plate, and upper and lower gasket rings are arranged between the connecting end and the fixing seat; The fixing seat is embedded in the connecting plate.

[0015] The diameters of the shaft body, the connecting end and the fixing seat are increasing.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In an axial interference fit shaft of the present invention, one end of the core shaft is arranged in a stretching mechanism, one end of the core shaft located in the stretching mechanism is connected to a first joint, one end of the core shaft passes through the stretching mechanism and is arranged in a carbon fiber sleeve, one end of the carbon fiber sleeve is fitted with the stretching mechanism, and the other end of the carbon fiber sleeve is clamped and matched with the upper and lower clamps at the mouth. When used, the core shaft is first installed in the carbon fiber sleeve by cold sleeve, the end face of the tail of the core shaft is fitted with the end face of the carbon fiber sleeve, and then hot water is injected into the first joint, and the hot water flows back to the pump station through the holes inside the core shaft in turn, and the core shaft is elongated by heating. During the heating process, upper and lower gaskets are installed from both sides; when the upper and lower gaskets are installed on the core shaft, the heating is stopped, so that the distance from the end face of the tail of the core shaft to the end faces of the upper and lower clamps at the mouth is less than the length of the carbon fiber sleeve, so as to ensure that the core shaft and the carbon fiber sleeve are axially interference fit after assembly, and the core shaft and the carbon fiber sleeve are axial interference structures, which will generate tensile stress inside to resist the stress generated by the temperature increase, so as to ensure that the mouth of the core shaft is not separated from the carbon fiber sleeve. Therefore, the core shaft of the present invention is not easy to produce relative displacement with the carbon fiber sleeve under temperature changes.

[0017] 2. In an axial interference fit shaft of the present invention, the stretching mechanism includes a base, a stretching piece, an adapter seat, and a connecting plate. A stud is transversely arranged in the base, one end of the stud passes through the side of the base and a stretching piece is arranged, the other end of the stud is connected to one end of the adapter seat, the other end of the adapter seat is connected to one end of the core shaft through multiple sets of bolts, and the upper and lower gaskets are arranged on the side of the connecting plate; the stud is coaxially arranged with the core shaft, the core shaft includes a connecting end and a shaft body, one end of the connecting end is connected to the other end of the adapter seat, and the other end of the connecting end is connected to one end of the shaft body; One end of the shaft body is set through the connecting plate. When in use, the disc spring group is deformed after being compressed. At this time, the elongation of the core shaft is less than the total deformation of the disc spring group, and the force of the disc spring group is basically stable; the pressure sensor can display the tension of the stretching mechanism at this time in real time, and adjust the tension in time according to needs to ensure that the core shaft is in a stable state. Therefore, the present invention is safe to use and easy to operate.

[0018] 3. In an axial interference fit shaft of the present invention, a spherical washer is located between the pressure sensor and the side plate, a fixing seat is installed at one end of the carbon fiber sleeve close to the connecting plate, and upper and lower gaskets are arranged between the connecting end and the fixing seat; the fixing seat is embedded in the connecting plate, and when the mandrel is extended to the target value at the tail, the upper and lower gaskets are inserted between the mandrel and the carbon fiber sleeve, the hot water is stopped, and the tension of the stretching tooling is gradually reduced until the mandrel and the carbon fiber sleeve are assembled, and the upper and lower gaskets can ensure timely and rapid switching channels. Therefore, the present invention is stable to install and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a cross-sectional view of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the stretching mechanism in the present invention.

[0022] Figure 4 It is a side view of the fixing seat in the present invention.

[0023] Figure 5 It is a side view of the mandrel in the present invention.

[0024] Figure 6 It is a structural schematic diagram of the disc spring group in the present invention.

[0025] Figure 7 It is an enlarged view of the disc spring assembly in the present invention.

[0026] Figure 8 It is an application schematic diagram of the present invention.

[0027] In the figure: core shaft 11, upper and lower gaskets 12, carbon fiber sleeve 13, upper and lower clamps 14 at the mouth, first threaded hole 15, internal hole 16, third threaded hole 17, right-angle joint 18, stretching mechanism 2, base 21, fixing seat 210, convex plate 211, circular inner plate 212, side plate 213, through-hole 214, stretching member 22, adapter seat 23, seat body 231, mounting plate 232, connecting plate 24, disc spring assembly 25, sleeve 251, disc spring 252, nut 253, second threaded hole 254, pressure sensor 26, stud 27, conical washer 28, spherical washer 29. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] See also Figures 1 to 8, an axial interference fit shaft, the axial interference fit shaft comprising a core shaft 11, a carbon fiber sleeve 13, upper and lower clamps 14 at the mouth, a right-angle joint 18 and a stretching mechanism 2; One end of the mandrel 11 is arranged in the stretching mechanism 2, and the end of the mandrel 11 located in the stretching mechanism 2 is connected to the first joint 19. One end of the mandrel 11 passes through the stretching mechanism 2 and is arranged in the carbon fiber sleeve 13. One end of the carbon fiber sleeve 13 is arranged in contact with the stretching mechanism 2, and the other end of the carbon fiber sleeve 13 is engaged with the upper and lower clamps 14 at the mouth. The end of the mandrel 11 close to the stretching mechanism 2 is provided with a first threaded hole 15, the mandrel 11 is provided with an internal hole 16, the internal hole 16 is connected with the first threaded hole 15 and is located on the same transverse axis, the end of the mandrel 11 away from the stretching mechanism 2 is provided with a third threaded hole 17, the inner thread of the third threaded hole 17 is matched with a right angle joint 18; The stretching mechanism 2 includes a base 21, a stretching piece 22, an adapter seat 23, and a connecting plate 24. A stud 27 is transversely arranged in the base 21. One end of the stud 27 passes through the side of the base 21 and is provided with a stretching piece 22. The other end of the stud 27 is connected to one end of the adapter seat 23. The other end of the adapter seat 23 is connected to one end of the core shaft 11 through multiple sets of bolts. The upper and lower gaskets 12 are arranged on the side of the connecting plate 24. The stud 27 is coaxially arranged with the core shaft 11 .

[0030] The core shaft 11 includes a connecting end 111 and a shaft body 112, one end of the connecting end 111 is connected to the other end of the adapter 23, and the other end of the connecting end 111 is connected to one end of the shaft body 112; One end of the shaft 112 passes through the connecting plate 24; The distance between the end of the shaft body 112 close to the connecting plate 24 and the end surface of the upper and lower clamps 14 at the mouth is less than the length of the carbon fiber sleeve 13 .

[0031] The base 21 includes a convex plate 211, a circular inner plate 212 and a side plate 213. The top of the convex plate 211 is embedded with a circular inner plate 212 with an opening facing right. The top of the convex plate 211 is located on the outer side of the circular inner plate 212 and is surrounded by a side plate 213. A through hole 214 is formed on the right side of the side plate 213 , and the through hole 214 is communicated with the inner cavity of the circular inner plate 212 .

[0032] A connecting plate 24 is disposed between the top right side of the convex plate 211 and the right side of the side plate 213, and the connecting plate 24 is disposed corresponding to the through opening 214; The connecting plate 24 is connected to the convex plate 211 and the side plate 213 by a plurality of sets of fixing bolts 214; The circular inner plate 212 is hollow.

[0033] The adapter seat 23 includes a seat body 231 and a mounting plate 232. The left end of the seat body 231 is connected to the right end of the mounting plate 232. The other end of the stud 27 penetrates the mounting plate 232 and is connected to the mounting plate 232 by a bolt. The right end of the seat body 231 is connected to one end of the connecting end 111. There is a gap between the stud 27 and the seat body 231 .

[0034] The stretching member 22 includes a disc spring assembly 25 and a pressure sensor 26 . The disc spring assembly 25 is sleeved on the outer side of the stud 27 , and the disc spring assembly 25 is connected to the pressure sensor 26 .

[0035] The disc spring assembly 25 includes a sleeve 251, eight disc springs 252 and a nut 253. A second threaded hole 254 is formed on the side of the sleeve 251, and a stud 27 is disposed through the second threaded hole 254. The outer periphery of the stud 27 is located on the left side of the sleeve 251 and is threadedly matched with a nut 253. Eight groups of disc springs 252 are arranged on the outer periphery of the sleeve 251. The disc spring 252 on the far right is connected to the pressure sensor 26.

[0036] A conical washer 28 is embedded on the left side of the side plate 213, and the conical washer 28 is connected to the spherical washer 29 by bolts; The spherical gasket 29 is located between the pressure sensor 26 and the side plate 213 .

[0037] A fixing seat 210 is installed at one end of the carbon fiber sleeve 13 close to the connecting plate 24, and upper and lower gaskets 12 are arranged between the connecting end 111 and the fixing seat 210; The fixing seat 210 is embedded in the connecting plate 24 .

[0038] The diameters of the shaft body 112 , the connecting end 111 , and the fixing seat 210 are increasing.

[0039] The supplementary description of the present invention is as follows: In order to ensure that the core shaft 11 can be interference fitted into the carbon fiber sleeve 13, the core shaft 11 needs to be heated to make it stretch. However, since the carbon fiber sleeve 13 has a good thermal insulation effect, if heated from the outside, the heat is difficult to transfer to the core shaft 11, and the purpose of heating the core shaft 11 to stretch it cannot be achieved. Therefore, a through hole is processed inside the core shaft 11, and hot water is introduced from one end and discharged from the other end during thermal expansion, so that the core shaft 11 is circulated and heated to stretch it.

[0040] Embodiment 1: An axial interference fit shaft, comprising a core shaft 11, a carbon fiber sleeve 13, upper and lower clamps 14 at the mouth, a right-angle joint 18 and a stretching mechanism 2; one end of the core shaft 11 is arranged in the stretching mechanism 2, one end of the core shaft 11 passes through the stretching mechanism 2 and is arranged in the carbon fiber sleeve 13, one end of the carbon fiber sleeve 13 is arranged in close contact with the stretching mechanism 2, and the other end of the carbon fiber sleeve 13 is engaged with the upper and lower clamps 14 at the mouth; a first threaded hole 15 is provided at one end of the core shaft 11 close to the stretching mechanism 2, an internal hole 16 is provided in the core shaft 11, and the internal hole 16 is connected to the first threaded hole 15 is connected and located on the same transverse axis, a third threaded hole 17 is opened at one end of the core shaft 11 away from the stretching mechanism 2, and the inner thread of the third threaded hole 17 is matched with a right-angle joint 18; the stretching mechanism 2 includes a base 21, a stretching piece 22, an adapter seat 23, and a connecting plate 24, a stud 27 is transversely penetrated in the base 21, one end of the stud 27 penetrates the side of the base 21 and is provided with the stretching piece 22, the other end of the stud 27 is connected to one end of the adapter seat 23, and the other end of the adapter seat 23 is connected to one end of the core shaft 11 through a plurality of bolts; the stud 27 is coaxially arranged with the core shaft 11.

[0041] When in use: first, insert the core shaft 11 into the carbon fiber sleeve 13 by cold sleeve, and the tail end face of the core shaft 11 is fitted with the end face of the carbon fiber sleeve 13; then install the upper and lower clamps 14 at the mouth, install the side beam to the connecting plate 24 by screws 210, install the adapter 23, and then install the first joint 19 and the right-angle joint 18, and connect them to the pump station through a hose, tighten the nut on the stretching piece 22, so that it applies axial tension to the core shaft 11; then inject hot water into the first joint 19, and the hot water flows back to the pump station through the first threaded hole 15, the internal hole 16, the third threaded hole 17, and the right-angle joint 18 in turn. At this time, the core shaft 11 is stretched by heating, and the upper and lower gaskets 12 are installed from both sides during the heating process; when the upper and lower gaskets 12 are installed on the core shaft 11, stop heating; when the temperature drops to half, loosen the stretching piece 22; when the room temperature is restored, remove the side beam from the stretching mechanism 2, remove the first joint 19 and the right-angle joint 18, and complete the assembly.

[0042] Embodiment 2: Embodiment 2 is substantially the same as Embodiment 1, except that: The core shaft 11 includes a connecting end 111 and a shaft body 112, one end of the connecting end 111 is connected to the other end of the adapter 23, and the other end of the connecting end 111 is connected to one end of the shaft body 112; one end of the shaft body 112 passes through the connecting plate 24; the distance between one end of the shaft body 112 close to the connecting plate 24 and the end face of the upper and lower clamps 14 at the mouth is less than the length of the carbon fiber sleeve 13.

[0043] When in use: the distance from the end faces of the tail of the core shaft 11 and the upper and lower gaskets 12 to the end faces of the upper and lower clamps 14 at the mouth is less than the length of the carbon fiber sleeve 13. In order to ensure that the core shaft 11 and the carbon fiber sleeve 13 are axially interference fit after assembly, tensile stress is generated in the core shaft 11 to resist the stress caused by the increase in temperature and ensure that the mouth of the core shaft 11 is not separated from the carbon fiber sleeve 13.

[0044] Embodiment 3: Embodiment 3 is substantially the same as Embodiment 1, except that: The stretching member 22 includes a disc spring group 25 and a pressure sensor 26. The disc spring group 25 is sleeved on the outer side of the stud 27, and the disc spring group 25 is connected to the pressure sensor 26; the disc spring group 25 includes a sleeve 251, eight disc spring groups 252 and a nut 253. A second threaded hole 254 is opened on the side of the sleeve 251, and the stud 27 is penetrated and arranged in the second threaded hole 254; the outer side of the stud 27 is located on the left side of the sleeve 251 and is threaded with a nut 253. Eight disc spring groups 252 are arranged on the outer side of the sleeve 251, and the disc spring on the far right is 252 is connected to the pressure sensor 26; a conical washer 28 is embedded on the left side of the side plate 213, and the conical washer 28 is connected to the spherical washer 29 by bolts; the spherical washer 29 is located between the pressure sensor 26 and the side plate 213; a fixing seat 210 is installed at one end of the carbon fiber sleeve 13 close to the connecting plate 24, and upper and lower gaskets 12 are arranged between the connecting end 111 and the fixing seat 210; the fixing seat 210 is embedded in the connecting plate 24; the diameters of the shaft body 112, the connecting end 111 and the fixing seat 210 are increasing.

[0045] During application: the diameter of the core shaft 11 increases after heating, and the transition fit with the inner hole of the carbon fiber sleeve 3 becomes an interference fit, which will hinder the extension of the length of the core shaft 11, and also hinder its retraction when cooling, resulting in a gap between the upper and lower clamps 4 at the front end and the small end surface of the carbon fiber sleeve 3. The disc spring group 25 is deformed after being compressed. At this time, the elongation of the core shaft 11 is less than the total deformation of the disc spring group 25, and the force of the disc spring group 25 is basically stable; the pressure sensor 26 can display the tension of the stretching mechanism 2 at this time in real time, and adjust the tension in time as needed.

[0046] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. An axial interference fit shaft, characterized in that: The axial interference fit shaft comprises a core shaft (11), a carbon fiber sleeve (13), upper and lower clamps (14) at the mouth, a right-angle joint (18) and a stretching mechanism (2); One end of the mandrel (11) is arranged in the stretching mechanism (2), the end of the mandrel (11) located in the stretching mechanism (2) is connected to the first joint (19), one end of the mandrel (11) passes through the stretching mechanism (2) and is arranged in the carbon fiber sleeve (13), one end of the carbon fiber sleeve (13) is arranged in close contact with the stretching mechanism (2), and the other end of the carbon fiber sleeve (13) is engaged with the upper and lower clamps (14) at the mouth; A first threaded hole (15) is formed at one end of the mandrel (11) close to the stretching mechanism (2), an internal hole (16) is formed inside the mandrel (11), the internal hole (16) is connected to the first threaded hole (15) and is located on the same transverse axis, and a third threaded hole (17) is formed at one end of the mandrel (11) away from the stretching mechanism (2), and the inner thread of the third threaded hole (17) is matched with a right-angle joint (18); The stretching mechanism (2) comprises a base (21), a stretching piece (22), an adapter seat (23), and a connecting plate (24); a stud (27) is arranged to penetrate the base (21) transversely; one end of the stud (27) penetrates the side of the base (21) and is provided with a stretching piece (22); the other end of the stud (27) is connected to one end of the adapter seat (23); the other end of the adapter seat (23) is connected to one end of the core shaft (11) via a plurality of bolts; and upper and lower gaskets (12) are arranged on the side of the connecting plate (24); The stud (27) is coaxially arranged with the core shaft (11).

2. The axial interference fit shaft according to claim 1, characterized in that: The core shaft (11) comprises a connecting end (111) and a shaft body (112), one end of the connecting end (111) is connected to the other end of the adapter seat (23), and the other end of the connecting end (111) is connected to one end of the shaft body (112); One end of the shaft body (112) is disposed through the connecting plate (24); The distance between one end of the shaft body (112) close to the connecting plate (24) and the end surfaces of the upper and lower clamps (14) at the mouth is less than the length of the carbon fiber sleeve (13).

3. The axial interference fit shaft according to claim 2, characterized in that: The base (21) comprises a convex plate (211), a circular inner plate (212) and a side plate (213); the circular inner plate (212) with an opening facing right is embedded on the top of the convex plate (211); the side plate (213) is installed on the top of the convex plate (211) and is located on the outer side of the circular inner plate (212); A through opening (214) is provided on the right side of the side plate (213), and the through opening (214) is communicated with the inner cavity of the circular inner plate (212).

4. The axial interference fit shaft according to claim 3, characterized in that: A connecting plate (24) is provided between the right side of the top of the convex plate (211) and the right side of the side plate (213), and the connecting plate (24) is provided corresponding to the through opening (214); The connecting plate (24) is connected to the convex plate (211) and the side plate (213) via a plurality of sets of fixing bolts (214); The circular inner plate (212) is hollow.

5. The axial interference fit shaft according to claim 2, characterized in that: The adapter seat (23) comprises a seat body (231) and a mounting plate (232), the left end of the seat body (231) is connected to the right end of the mounting plate (232), the other end of the stud (27) passes through the mounting plate (232) and is connected to the mounting plate (232) via a bolt, and the right end of the seat body (231) is connected to one end of the connecting end (111); There is a gap between the stud (27) and the seat body (231).

6. The axial interference fit shaft according to claim 1, characterized in that: The stretching member (22) comprises a disc spring group (25) and a pressure sensor (26); the disc spring group (25) is sleeved on the outer side of the stud (27); and the disc spring group (25) is connected to the pressure sensor (26).

7. The axial interference fit shaft according to claim 6, characterized in that: The disc spring group (25) comprises a sleeve (251), eight sets of disc springs (252) and a nut (253); a second threaded hole (254) is provided on the side of the sleeve (251); and a stud (27) is provided through the second threaded hole (254); The outer periphery of the stud (27) is located on the left side of the sleeve (251) and is threadedly matched with a nut (253). Eight groups of disc springs (252) are arranged on the outer periphery of the sleeve (251), and the disc spring (252) on the far right is connected to the pressure sensor (26).

8. The axial interference fit shaft according to claim 2, characterized in that: A conical washer (28) is embedded on the left side of the side plate (213), and the conical washer (28) and the spherical washer (29) are connected via bolts; The spherical gasket (29) is located between the pressure sensor (26) and the side plate (213).

9. The axial interference fit shaft according to claim 8, characterized in that: A fixing seat (210) is installed at one end of the carbon fiber sleeve (13) close to the connecting plate (24), and upper and lower gasket rings (12) are arranged between the connecting end (111) and the fixing seat (210); The fixing seat (210) is embedded in the connecting plate (24).

10. The axial interference fit shaft according to claim 9, characterized in that: The diameters of the shaft body (112), the connecting end (111), and the fixing seat (210) are in an increasing trend.

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