Locking structure for shaft

Abstract

The invention relates to the technical field of shaft locking structures, in particular to a shaft locking structure which comprises a first connecting part, a second connecting part and a locking part. The first connecting part and the second connecting part are coaxially and rotatably connected; the locking part is movably arranged outside the first connecting part and the second connecting part in a sleeving manner; after the locking part rotates by a preset angle in the circumferential direction of the first connecting part and the second connecting part and then moves by a preset distance in the axial direction of the first connecting part and the second connecting part, the locking part is connected with the first connecting part and the second connecting part in a clamped mode. The locking structure for the shaft can be assembled and disassembled through operations such as screwing and pressing in in the axial direction and the circumferential direction, the structure is light and flexible, operation is easy and convenient, extra operation space does not need to be reserved in the radial direction in the actual use process, the limitation conditions of the operation space for assembly, maintenance and replacement work are overcome, and the working efficiency is improved. And application in a narrow space is facilitated, and the space utilization rate in the aero-engine is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of shaft locking structures, and in particular relates to a shaft locking structure. Background Art

[0002] Aircraft engines are equipped with shafts, tie rods and other parts, which are mainly used to connect with the rotor, so as to transmit the pulling force and torque of the rotor and pre-tighten the rotor. The reliable operation of shafts, tie rods and other parts is crucial to the safe operation of the rotor. Therefore, it is necessary to lock the shafts, tie rods and other parts in the aircraft engine to avoid loosening and ensure the safe operation of the engine.

[0003] Existing shafts, tie rods and other parts generally achieve the purpose of locking by setting locking structures such as nuts, clamps, stop rings or retaining rings. However, locking by locking structures such as nuts, clamps, stop rings or retaining rings not only has cumbersome assembly steps, but also requires a large installation space to be reserved in advance when planning the structure. In addition, in order to prevent the subsequent need for repair and replacement due to damage to the components, a large operating space still needs to be reserved after the assembly is completed to facilitate the maintenance and replacement of the staff, resulting in a relatively loose arrangement between the components, especially in the aircraft engine, which greatly affects the space utilization rate in the aircraft engine. If sufficient installation and operation space is not reserved, it is not convenient to carry out assembly, maintenance and replacement work, which greatly affects the work efficiency.

[0004] Therefore, it is difficult to complete the assembly, maintenance and replacement of the existing locking structure in a small space. Summary of the invention

[0005] In view of the above problems, the present invention proposes a shaft locking structure, comprising:

[0006] A first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are coaxially rotatably connected to each other;

[0007] A locking portion, the locking portion being movably sleeved on the outside of the first connecting portion and the second connecting portion;

[0008] When the locking portion rotates around the circumference of the first connecting portion and the second connecting portion by a preset angle and then moves axially along the first connecting portion and the second connecting portion by a preset distance, the locking portion is respectively engaged with the first connecting portion and the second connecting portion.

[0009] In some specific embodiments, the first connecting portion is an outer shaft, and the second connecting portion is an inner shaft;

[0010] One end of the inner shaft is rotatably sleeved inside the outer shaft along the axial direction of the outer shaft;

[0011] In some specific embodiments, an internal thread is arranged on the inner wall of the outer shaft, and an external thread is arranged on the outer wall of the inner shaft, and the internal thread and the external thread are adapted to each other.

[0012] In some specific embodiments, the locking portion includes:

[0013] A locking ring, which is movably sleeved on the outer circumference of the outer shaft and the inner shaft along the axial direction of the outer shaft and the inner shaft;

[0014] The inner wall of the locking ring can be engaged with the outer shaft and the inner shaft.

[0015] In some specific embodiments, a first protrusion is provided on the outer wall of the outer shaft;

[0016] A first groove is formed on the inner wall of the lock ring along the axial direction of the lock ring;

[0017] The first groove and the first protrusion can be clamped together.

[0018] In some specific embodiments, a second protrusion is provided on the outer wall of the inner shaft;

[0019] A second groove is formed on the inner wall of the lock ring along the axial direction of the lock ring;

[0020] The second groove and the second protrusion can be arranged in a clamping connection;

[0021] When the first protrusion is engaged with the first groove, the second protrusion is also engaged with the second groove.

[0022] In some specific embodiments, there are multiple first grooves, and the multiple first grooves are evenly arranged around the circumference of the lock ring;

[0023] There are a plurality of second grooves, and the plurality of second grooves are evenly arranged around the circumference of the lock ring;

[0024] The plurality of first grooves and the plurality of second grooves are arranged in one-to-one correspondence;

[0025] Some of the first grooves are blind grooves;

[0026] Alternatively, some of the second grooves are blind grooves;

[0027] Alternatively, some of the first grooves and the second grooves that are arranged correspondingly are blind grooves.

[0028] In some specific embodiments, a third groove is provided on the outer wall of the inner shaft;

[0029] A hook is provided on the inner wall of the lock ring;

[0030] The third groove and the hook can be arranged in a clamping connection;

[0031] When the first protrusion is engaged with the first groove, the hook is engaged with the third groove.

[0032] In some specific embodiments, there are multiple first grooves, and the multiple first grooves are evenly arranged around the circumference of the lock ring;

[0033] There are a plurality of the third grooves, and the plurality of the third grooves are evenly arranged around the circumference of the inner shaft;

[0034] The plurality of first grooves and the plurality of third grooves are arranged in one-to-one correspondence;

[0035] Some of the first grooves are blind grooves.

[0036] In some specific embodiments, the locking portion further comprises:

[0037] A gasket ring, which is fixedly sleeved on the outer periphery of the outer shaft along the axial direction of the outer shaft, and the gasket ring and the lock ring together form the driving cavity;

[0038] A spring is arranged in the driving cavity, and two ends of the spring are respectively connected to the gasket and the locking ring.

[0039] The shaft locking structure of the present invention can be connected to the parts to be locked respectively through the coaxially connected first connecting part and the second connecting part. When the locking part rotates a preset angle and then moves a preset distance, the locking part can be respectively engaged with the first connecting part and the second connecting part, thereby locking the first connecting part and the second connecting part, thereby realizing the locking process of the parts to be locked. When the parts need to be repaired or replaced, the locking part only needs to move the preset distance in the reverse direction and then rotate the preset angle in the reverse direction to realize the unlocking process of the parts. Instead of the original locking method by setting a locking structure such as a nut, a clamping ring, a stop ring or a retaining ring, the assembly and disassembly of the shaft locking structure can be completed by operations in the axial and circumferential directions such as twisting and pressing. The structure is light and flexible, and the operation is simple and convenient. In actual use, there is no need to reserve additional operating space in the radial direction of the first connecting part and the second connecting part, which overcomes the limiting conditions of the operating space on assembly, maintenance and replacement work, is convenient for application in a narrow space, and greatly improves the space utilization rate in the aircraft engine.

[0040] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of a shaft locking structure in an embodiment of the present invention is shown;

[0043] Figure 2 A side cross-sectional view showing a connection between a first connection portion and a second connection portion in an embodiment of the present invention is shown;

[0044] Figure 3 A connection side cross-sectional view of a locking portion in an embodiment of the present invention is shown;

[0045] Figure 4 A side cross-sectional view of a locking ring in an embodiment of the present invention is shown;

[0046] Figure 5 A side cross-sectional view showing the connection between the gasket and the spring in an embodiment of the present invention is shown;

[0047] Figure 6 for Figure 3 A side cross-sectional view of the first protrusion of the blind groove structure being aligned with the first groove;

[0048] Figure 7 for Figure 6 A side cross-sectional view of a first protrusion embedded in a first groove of a blind groove structure;

[0049] Figure 8 Another schematic diagram of the shaft locking structure in an embodiment of the present invention is shown.

[0050] In the figure, 100, first connecting part; 110, outer shaft; 111, first protrusion; 200, second connecting part; 210, inner shaft; 211, second protrusion; 212, third groove; 300, locking part; 310, locking ring; 311, first groove; 312, second groove; 313, hook; 320, gasket; 330, spring. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Reference Figure 1 , a shaft locking structure, comprising: a first connecting part 100, a second connecting part 200 and a locking part 300. The first connecting part 100 and the second connecting part 200 are coaxially connected to each other. The locking part 300 is movably sleeved on the outside of the first connecting part 100 and the second connecting part 200. The locking part 300 can move along the axial direction of the first connecting part 100 and the second connecting part 200, and the locking part 300 can also rotate around the circumference of the first connecting part 100 and the second connecting part 200. When the locking part 300 rotates around the circumference of the first connecting part 100 and the second connecting part 200 by a preset angle, and then moves along the axial direction of the first connecting part 100 and the second connecting part 200 by a preset distance, the locking part 300 is respectively connected to the first connecting part 100 and the second connecting part 200 by a clamping connection.

[0053] Specifically, the first connection part 100 and the second connection part 200 are coaxially arranged, and one end of the first connection part 100 is rotatably connected to one end of the second connection part 200, so that the first connection part 100 and the second connection part 200 can both rotate around the circumference of the first connection part 100 and the second connection part 200, wherein the first connection part 100 and the second connection part 200 can be respectively connected to different components to be locked, thereby realizing the connection between different components to be locked. The locking portion 300 is movably sleeved on the outside of the first connection portion 100 and the second connection portion 200, so that the locking portion 300 can rotate relative to the first connection portion 100 and the second connection portion 200 around the circumference of the first connection portion 100 and the second connection portion 200, and can also move relative to the first connection portion 100 and the second connection portion 200 along the axial direction of the first connection portion 100 and the second connection portion 200, wherein, when the locking portion 300 rotates around the circumference of the first connection portion 100 and the second connection portion 200 by a preset angle and then moves along the axial direction of the first connection portion 100 and the second connection portion 200 by a preset distance, the locking portion 300 can be respectively connected with the first connection portion 100 and the second connection portion 200. The connecting part 200 is engaged, and under the action of the locking part 300, the first connecting part 100 and the second connecting part 200 are locked, thereby realizing the locking process of the parts to be locked respectively connected to the first connecting part 100 and the second connecting part 200. When the parts need to be repaired or replaced, it is only necessary to move the locking part 300 in the axial direction of the first connecting part 100 and the second connecting part 200 in the opposite direction by a preset distance, and then rotate the locking part 300 in the circumferential direction of the first connecting part 100 and the second connecting part 200 in the opposite direction by a preset angle, so that the engagement between the first connecting part 100 and the second connecting part 200 can be released, thereby realizing the unlocking process of the parts respectively connected to the first connecting part 100 and the second connecting part 200. Instead of the original locking method by setting a locking structure such as a nut, a clamping ring, a stop ring or a retaining ring, the assembly and disassembly of the shaft locking structure can be completed by twisting, pressing, and other operations on the axial and circumferential directions of the first connecting part 100 and the second connecting part 200. The structure is light and flexible, and the operation is simple and convenient. In actual use, there is no need to reserve additional operating space in the radial direction of the first connecting part 100 and the second connecting part 200, which overcomes the restrictions of the operating space on assembly, maintenance and replacement work, is easy to use in a small space, and greatly improves the space utilization rate in the aircraft engine.

[0054] In some specific embodiments of the present invention, referring to Figure 2 The first connecting part 100 is an outer shaft 110, and the second connecting part 200 is an inner shaft 210. One end of the inner shaft 210 is rotatably sleeved in the outer shaft 110 along the axial direction of the outer shaft 110.

[0055] Specifically, one end of the inner shaft 210 is inserted into the outer shaft 110 through one end of the outer shaft 110, and the inner shaft 210 and the outer shaft 110 are rotatably connected, so that the outer shaft 110 is rotatably sleeved on the outside of the inner shaft 210. The locking portion 300 is sleeved at the junction of the outer shaft 110 and the inner shaft 210 along the axial direction of the outer shaft 110 and the inner shaft 210, that is, one end of the locking portion 300 extends to the outside of the outer shaft 110 and is sleeved on the outer shaft 110, and the other end of the locking portion 300 extends to the outside of the inner shaft 210 and is sleeved on the inner shaft 210. Thereby, it is convenient to realize that the locking portion 300 is clamped with the outer shaft 110 and the inner shaft 210 at the same time. Furthermore, the shaft-shaped outer shaft 110 and the inner shaft 210 facilitate the locking portion 300 to be connected with the outer shaft 110 and the inner shaft 210 only by twisting, pressing, and other operations on the axial and circumferential directions of the outer shaft 110 and the inner shaft 210. The structure is light and flexible, and the operation is simple and convenient. It overcomes the restrictions of the operating space on assembly, maintenance and replacement work, is easy to use in a small space, and greatly improves the space utilization rate in the aircraft engine.

[0056] In some specific embodiments of the present invention, referring to Figure 2 The outer shaft 110 is provided with an internal thread on the inner wall, and the inner shaft 210 is provided with an external thread on the outer wall. The internal thread and the external thread are adapted to each other, so that the outer shaft 110 and the inner shaft 210 can be rotatably connected through the external thread and the internal thread that are adapted to each other. Under the action of the external thread and the internal thread, the interaction force between the outer shaft 110 and the inner shaft 210 can be improved, so as to ensure that the outer shaft 110 and the inner shaft 210 can rotate with each other while improving the stability of the relative setting position and the relative setting angle between the outer shaft 110 and the inner shaft 210, so as to facilitate the locking part 300 to be clamped with the outer shaft 110 and the inner shaft 210, and avoid the failure of the locking part 300 to be clamped with the outer shaft 110 and the outer shaft 110 due to looseness between the outer shaft 110 and the inner shaft 210.

[0057] In some specific embodiments of the present invention, referring to Figure 3 The locking part 300 includes a locking ring 310. The locking ring 310 is movably sleeved on the outer circumference of the outer shaft 110 and the inner shaft 210 along the axial direction of the outer shaft 110 and the inner shaft 210. The inner wall of the locking ring 310 can be engaged with the outer shaft 110 and the inner shaft 210.

[0058] Specifically, the locking ring 310 is movably sleeved at the junction of the outer shaft 110 and the inner shaft 210 along the axial direction of the outer shaft 110 and the inner shaft 210, that is, one end of the locking ring 310 in the axial direction extends to the outside of the outer shaft 110 and is sleeved on the outer shaft 110, and the other end of the locking ring 310 in the axial direction extends to the outside of the inner shaft 210 and is sleeved on the inner shaft 210. Among them, the locking ring 310 can rotate around the outer shaft 110 and the inner shaft 210 in the circumferential direction outside the outer shaft 110 and the inner shaft 210, and the locking ring 310 can also move along the axial direction of the outer shaft 110 and the inner shaft 210 outside the outer shaft 110 and the inner shaft 210. By driving the locking ring 310 to move in the axial and circumferential directions of the outer shaft 110 and the inner shaft 210, the inner walls at both ends of the locking ring 310 can be respectively engaged with the outer wall of the outer shaft 110 and the outer wall of the inner shaft 210. The structure is light and flexible, and the operation is simple and convenient. In actual use, there is no need to reserve additional operating space in the radial direction of the outer wall and the inner shaft 210, which overcomes the restrictions of the operating space on assembly, maintenance and replacement work, is easy to use in a small space, and greatly improves the space utilization rate in the aircraft engine.

[0059] In some specific embodiments of the present invention, referring to Figure 2 , a first protrusion 111 is provided on the outer wall of the outer shaft 110. A first groove 311 is provided on the inner wall of the locking ring 310 along the axial direction of the locking ring 310. The first groove 311 and the first protrusion 111 can be snap-fitted. Specifically, the first protrusion 111 is provided on the outer wall of the outer shaft 110, and the first groove 311 is provided on the inner wall of the locking ring 310 at one end close to the outer shaft 110. The first groove 311 and the first protrusion 111 are adapted to each other, so that the first groove 311 and the first protrusion 111 can be snap-fitted. Figure 3 When it is necessary to clamp the locking ring 310 and the outer shaft 110, the locking ring 310 is rotated around the circumference of the outer shaft 110 to a preset angle so that the first protrusion 111 can be set opposite to the first groove 311, and the locking ring 310 is moved axially along the outer shaft 110 by a preset distance, so that the first protrusion 111 set opposite to the first groove 311 can be embedded in the first groove 311 as the locking ring 310 moves, and the locking ring 310 and the outer shaft 110 are clamped together by the first protrusion 111 and the first groove 311. When it is necessary to release the locking ring 310 from the outer shaft 110, the locking ring 310 is moved in the reverse axial direction of the outer shaft 110 by a preset distance so that the first protrusion 111 is disengaged from the first groove 311, and the locking ring 310 is rotated in the reverse circumferential direction of the outer shaft 110 to a preset angle so that the first protrusion 111 is no longer directly opposite the first groove 311. By means of the misaligned setting between the first protrusion 111 and the first groove 311, it is possible to avoid re-engaging with the outer shaft 110 before the locking ring 310 itself is actively driven to move. The structure is light and flexible, and the operation is simple and convenient.

[0060] Furthermore, a first ring body is arranged on the inner wall of one end of the locking ring 310 close to the outer shaft 110 around the circumference of the outer shaft 110, so that the first ring body can also be sleeved on the outside of the outer shaft 110 and the inner shaft 210, and the first groove 311 is opened on the side of the first ring body close to the outer shaft 110, that is, on the inner wall of the first ring body. Through the arrangement of the first ring body, a gap can be generated between the inner wall of the locking ring 310 and the outer wall of the outer shaft 110, so as to facilitate the movement of the first protrusion 111 in the gap, that is, when the first protrusion 111 escapes from the first groove 311, the first protrusion 111 can be driven to rotate relative to the locking ring 310 around the circumference of the outer shaft 110 in the gap between the inner wall of the locking ring 310 and the outer wall of the outer shaft 110 by rotating the locking ring 310.

[0061] Furthermore, a second ring body is arranged on the outer wall of the outer shaft 110 in the circumferential direction of the outer shaft 110, and the first protrusion 111 is arranged on the second ring body. The second ring body can increase the interval between the first ring body and the outer wall of the outer shaft 110, thereby preventing the first ring body from wearing the outer wall of the outer shaft 110 when the locking ring 310 moves.

[0062] In some specific embodiments of the present invention, referring to Figure 2 , a second protrusion 211 is provided on the outer wall of the inner shaft 210. A second groove 312 is provided on the inner wall of the locking ring 310 along the axial direction of the locking ring 310. The second groove 312 and the second protrusion 211 can be snap-fitted. When the first protrusion 111 is snap-fitted with the first groove 311, the second protrusion 211 is also snap-fitted with the second groove 312. Specifically, the second protrusion 211 is provided on the outer wall of the inner shaft 210, and the second groove 312 is provided on the inner wall of the locking ring 310 at one end close to the inner shaft 210. The second groove 312 and the second protrusion 211 are adapted to each other, so that the second groove 312 and the second protrusion 211 can be snap-fitted. Refer to Figure 3When it is necessary to clamp the locking ring 310 and the inner shaft 210, the locking ring 310 is rotated around the circumference of the inner shaft 210 to a preset angle so that the second protrusion 211 can be set opposite the second groove 312, and the locking ring 310 is moved axially along the inner shaft 210 by a preset distance, so that the second protrusion 211 set opposite the second groove 312 can be embedded in the second groove 312 as the locking ring 310 moves, and the locking ring 310 and the inner shaft 210 are clamped together by the second protrusion 211 and the second groove 312. When the locking ring 310 needs to be released from the clamping connection between the inner shaft 210, the locking ring 310 is moved in the axial direction of the inner shaft 210 by a preset distance in the reverse direction, so that the second protrusion 211 is disengaged from the second groove 312, and the locking ring 310 is rotated in the circumferential direction of the inner shaft 210 to a preset angle in the reverse direction, so that the second protrusion 211 is no longer arranged directly opposite the second groove 312. By means of the misaligned arrangement between the second protrusion 211 and the second groove 312, it is possible to avoid the locking ring 310 from being re-engaged with the inner shaft 210 before actively driving itself to move, and the structure is light and flexible, and the operation is simple and convenient. In addition, the arrangement positions of the first protrusion 111, the second protrusion 211, the first groove 311 and the second groove 312 correspond to each other, and when the first protrusion 111 is clamped with the first groove 311, the second protrusion 211 can also be clamped with the second groove 312, so that the clamping connection and fixation between the outer shaft 110 and the inner shaft 210 is achieved through the locking ring 310.

[0063] Furthermore, a third ring body is arranged on the inner wall of one end of the locking ring 310 close to the inner shaft 210 around the circumference of the inner shaft 210, so that the first ring body can also be sleeved on the outside of the outer shaft 110 and the inner shaft 210, and the second groove 312 is opened on the side of the third ring body close to the inner shaft 210, that is, on the inner wall of the third ring body. The arrangement of the third ring body can generate a gap between the inner wall of the locking ring 310 and the outer wall of the outer shaft 110, so as to facilitate the movement of the second protrusion 211 in the gap, that is, when the second protrusion 211 escapes from the second groove 312, the second protrusion 211 can be driven to rotate relative to the locking ring 310 around the circumference of the inner shaft 210 in the gap between the inner wall of the locking ring 310 and the outer wall of the inner shaft 210 by rotating the locking ring 310.

[0064] Furthermore, a fourth ring body is arranged on the outer wall of the inner shaft 210 in the circumferential direction of the inner shaft 210, and the second protrusion 211 is arranged on the fourth ring body. The fourth ring body can increase the interval between the third ring body and the outer wall of the inner shaft 210, thereby preventing the third ring body from wearing the outer wall of the inner shaft 210 when the locking ring 310 moves.

[0065] It should be noted that the outer shaft 110, the inner shaft 210 and the locking ring 310 are all coaxially arranged, so the axial direction of the outer shaft 110, the axial direction of the inner shaft 210 and the axial direction of the locking ring 310 are the same, and the circumferential direction of the outer shaft 110, the circumferential direction of the inner shaft 210 and the circumferential direction of the locking ring 310 are the same.

[0066] In some specific embodiments of the present invention, referring to Figure 4 There are multiple first grooves 311, and the multiple first grooves 311 are evenly arranged around the circumference of the lock ring 310. There are multiple second grooves 312, and the multiple second grooves 312 are evenly arranged around the circumference of the lock ring 310. The multiple first grooves 311 and the multiple second grooves 312 are arranged one by one. Some of the first grooves 311 are blind grooves. Or, some of the second grooves 312 are blind grooves. Or, some of the first grooves 311 and the second grooves 312 that are arranged in correspondence are both blind grooves.

[0067] Specifically, a plurality of first grooves 311 are evenly arranged on the first ring body around the circumference of the lock ring 310, and a plurality of second grooves 312 are evenly arranged on the third ring body around the circumference of the lock ring 310. In addition, the spacing between the first grooves 311 and the second grooves 312 is adapted to the axial length of the lock ring 310.

[0068] Among them, refer to Figure 6 If part of the first groove 311 is a blind groove, when the outer shaft 110 and the inner shaft 210 need to be clamped by the lock ring 310, the lock ring 310 is rotated around the circumference of the inner shaft 210 and the outer shaft 110 to a preset angle, so that the second protrusion 211 is set to face one of the second grooves 312, and the first protrusion 111 is set to face one of the first grooves 311 with a blind groove structure, refer to Figure 7 , and then move the lock ring 310 a preset distance along the axial direction of the inner shaft 210 and the outer shaft 110, so that the first protrusion 111 is embedded in the first groove 311 of the blind groove structure. At the same time, the second protrusion 211 can also be embedded in the corresponding second groove 312, and under the action of the blind groove structure of the first groove 311, it is clamped and fixed with the first protrusion 111, so that the second protrusion 211 can also be clamped and fixed with the second groove 312, thereby realizing the clamping and fixing of the outer shaft 110 and the inner shaft 210.

[0069] If some of the second grooves 312 are blind grooves, when it is necessary to clamp the outer shaft 110 and the inner shaft 210 through the locking ring 310, the locking ring 310 is rotated around the circumference of the inner shaft 210 and the outer shaft 110 to a preset angle, so that the first protrusion 111 is set opposite to one of the first grooves 311, and the second protrusion 211 is set opposite to one of the second grooves 312 with a blind groove structure, and then the locking ring 310 is moved axially along the inner shaft 210 and the outer shaft 110 by a preset distance, so that the second protrusion 211 is embedded in the second groove 312 of the blind groove structure. At the same time, the first protrusion 111 can also be exactly embedded in the corresponding first groove 311, and be clamped and fixed with the second protrusion 211 under the action of the blind groove structure of the second groove 312, so that the first protrusion 111 can also be exactly clamped and fixed with the first groove 311, thereby realizing the clamping and fixation of the outer shaft 110 and the inner shaft 210.

[0070] If some of the first grooves 311 and the second grooves 312 that are set correspondingly are blind grooves, when it is necessary to clamp the outer shaft 110 and the inner shaft 210 through the locking ring 310, the locking ring 310 is rotated around the circumference of the inner shaft 210 and the outer shaft 110 to a preset angle, so that the first protrusion 111 is set opposite to one of the first grooves 311 with a blind groove structure, and the second protrusion 211 is also set opposite to one of the second grooves 312 with a blind groove structure, and then the locking ring 310 is moved axially along the inner shaft 210 and the outer shaft 110 by a preset distance, so that the first protrusion 111 is embedded in the first groove 311 of the blind groove structure. At the same time, the second protrusion 211 can also be just embedded in the corresponding second groove 312, and under the action of the blind groove structure of the first groove 311 and the second groove 312, they are respectively clamped and fixed with the first protrusion 111 and the second protrusion 211, thereby realizing the clamping and fixing of the outer shaft 110 and the inner shaft 210.

[0071] It should be noted that when the clamping connection between the outer shaft 110 and the inner shaft 210 needs to be released, the lock ring 310 is first moved in the axial direction of the inner shaft 210 and the outer shaft 110 by a preset distance, so that the first protrusion 111 is disengaged from the first groove 311, and the second protrusion 211 is disengaged from the second groove 312, and the clamping connection between the outer shaft 110 and the inner shaft 210 can be released. When the lock ring 310 is rotated in the circumferential direction of the inner shaft 210 and the outer shaft 110 to a preset angle, the first protrusion 111 is arranged opposite to one of the first grooves 311 that is not a blind groove structure, and the second protrusion 211 is also arranged opposite to one of the second grooves 312 that is not a blind groove structure, the lock ring 310 is then moved in the axial direction of the inner shaft 210 and the outer shaft 110 until the first protrusion 111 and the second protrusion 211 pass through the first groove 311 and the second groove 312 respectively, and until the second protrusion 211 also passes through the first groove 311, the lock ring 310 can be removed. The locking ring 310 can be assembled and disassembled by operations such as twisting and pressing on the axial and circumferential directions of the outer shaft 110 and the inner shaft 210. The structure is light and flexible, and the operation is simple and convenient. In actual use, there is no need to reserve additional operating space in the radial direction of the outer shaft 110 and the inner shaft 210, which overcomes the restrictions of the operating space on assembly, maintenance and replacement work, is easy to use in a small space, and greatly improves the space utilization rate in the aircraft engine.

[0072] It should be noted that the above-mentioned preset angle and preset distance are determined according to the setting positions of the first groove 311 and the second groove 312 of the blind groove structure, as long as the clamping of the inner shaft 210 and the outer shaft 110 can be achieved. At the same time, the setting positions between the multiple first grooves 311 and the multiple second grooves 312 can be aligned one by one along the axial direction of the outer shaft 110 and the inner shaft 210. When the outer shaft 110 and the inner shaft 210 need to be clamped, only the inner shaft 210 and the outer shaft 110 need to be rotated in advance to align the first protrusion 111 and the second protrusion 211, so that the angle that the lock ring 310 should rotate and the distance it should move can be accurately grasped, which is convenient for operation.

[0073] In some specific embodiments of the present invention, referring to Figure 8 , a third groove 212 is provided at the outer wall end of the inner shaft 210 along the axial direction of the inner shaft 210. A hook 313 is provided on the inner wall end of the lock ring 310. The third groove 212 and the hook 313 can be arranged in a snap-fitting manner. In addition, the first protrusion 111, the third groove 212, the first groove 311 and the hook 313 are arranged in positions corresponding to each other. When the first protrusion 111 is snap-fitted with the first groove 311, the hook 313 can also be snap-fitted with the third groove 212, so that the snap-fitting connection and fixation between the outer shaft 110 and the inner shaft 210 is achieved through the lock ring 310.

[0074] Furthermore, the hook 313 can be a bendable metal strip. When the first protrusion 111 is engaged in the first groove 311, the hook 313 is arranged opposite to the third groove 212. By bending the hook 313, the hook 313 can be bent to the inside of the inner shaft 210 and the hook 313 is arranged to cover the bottom of the third groove 212, so that the hook 313 is engaged with the third groove 212, and the inner shaft 210 and the outer shaft 110 are engaged. If the engagement between the inner shaft 210 and the outer shaft 110 needs to be released, the hook 313 only needs to be bent out from the inside of the inner shaft 210, and the lock ring 310 can be removed smoothly. While saving space, the operability of the clamping can be improved. Since the hook 313 is a bendable metal strip, even if there are errors in the setting positions of the first protrusion 111, the third groove 212, the first groove 311 and the hook 313 during processing, the inner shaft 210 and the outer shaft 110 can be clamped together through the locking ring 310, thereby improving the production yield rate.

[0075] In some specific embodiments of the present invention, referring to Figure 8There are multiple first grooves 311, and the multiple first grooves 311 are evenly arranged around the circumference of the lock ring 310. There are multiple third grooves 212, and the multiple third grooves 212 are evenly arranged around the circumference of the inner shaft 210. The multiple first grooves 311 and the multiple third grooves 212 are arranged one by one. Some of the first grooves 311 are blind grooves. Specifically, the multiple first grooves 311 are evenly arranged around the circumference of the lock ring 310 and arranged on the first ring body, and the multiple third grooves 212 are evenly arranged around the circumference of the inner shaft 210 and opened on the end of the inner shaft 210. In addition, the spacing distance between the first protrusion 111 and the groove bottom of the third groove 212 is adapted to the axial length of the lock ring 310. Among them, some of the first grooves 311 are blind grooves. When the outer shaft 110 and the inner shaft 210 need to be clamped together by the locking ring 310, the locking ring 310 is rotated around the circumference of the inner shaft 210 and the outer shaft 110 to a preset angle, so that the first protrusion 111 is set opposite to one of the first grooves 311 with a blind groove structure, and the hook 313 is set opposite to one of the third grooves 212, and then the locking ring 310 is moved axially along the inner shaft 210 and the outer shaft 110 by a preset distance, so that the first protrusion 111 is embedded in the first groove 311 of the blind groove structure, and the hook 313 is bent, so that the hook 313 passes through the third groove 212 to the inside of the inner shaft 210 and is covered on the bottom of the third groove 212, and is clamped and fixed with the first protrusion 111 under the action of the blind groove structure of the first groove 311, so that the hook 313 can also be clamped and fixed with the third groove 212, thereby realizing the clamping and fixing of the outer shaft 110 and the inner shaft 210.

[0076] It should be noted that when the locking ring 310 and the inner shaft 210 are connected by setting the hook 313 and the third groove 212, part of the first groove 311 must be a blind groove structure to ensure the connection stability between the locking ring 310 and the outer shaft 110 and the inner shaft 210, and prevent the locking ring 310 from loosening.

[0077] It should be noted that the above-mentioned preset angle and preset distance are determined according to the setting position of the first groove 311 of the blind groove structure, as long as the clamping connection between the inner shaft 210 and the outer shaft 110 can be achieved. At the same time, the setting position between the first groove 311 of the blind groove structure and the hook 313 can be arranged along the axial alignment of the outer shaft 110 and the inner shaft 210. When the outer shaft 110 and the inner shaft 210 need to be clamped, the inner shaft 210 and the outer shaft 110 only need to be rotated in advance to align the first protrusion 111 and the third groove 212, so that the angle and distance that the lock ring 310 should be rotated can be accurately grasped, which is convenient for operation.

[0078] In some specific embodiments of the present invention, referring to Figure 3The locking part 300 further includes: a gasket 320 and a spring 330. The gasket 320 is fixedly sleeved on the outer periphery of the outer shaft 110 along the axial direction of the outer shaft 110, and the gasket 320 and the locking ring 310 together form a driving cavity. The spring 330 is arranged in the driving cavity, and the two ends of the spring 330 are respectively connected to the gasket 320 and the locking ring 310.

[0079] Specifically, the backing ring 320 is axially fixedly sleeved on the outer wall of the outer shaft 110, that is, the backing ring 320 cannot move along the axial direction of the outer shaft 110. The backing ring 320 and the first ring body of the lock ring 310 enclose a driving cavity, and the spring 330 is arranged in the driving cavity. One end of the spring 330 abuts against the backing ring 320, and the other end abuts against the first ring body, so that the lock ring 310 can be pushed to move along the axial direction of the outer shaft 110 and the inner shaft 210 under the elastic force of the spring 330. When the inner shaft 210 and the outer shaft 110 need to be clamped, the lock ring 310 only needs to be rotated to align the first protrusion 111 and the second protrusion 211 with the corresponding first groove 311 and the second groove 312, and the lock ring 310 can be pushed to move along the axial direction of the outer shaft 110 and the inner shaft 210 under the elastic force of the spring 330, so that the first protrusion 111 and the second protrusion 211 are directly clamped with the corresponding first groove 311 and the second groove 312, respectively, which is convenient for operation. Moreover, after the inner shaft 210 and the outer shaft 110 are clamped, the elastic force of the spring 330 can prevent the first protrusion 111 and the second protrusion 211 from being easily disengaged from the first groove 311 and the second groove 312, respectively, thereby ensuring that the clamping of the inner shaft 210 and the outer shaft 110 is stable.

[0080] Further, refer to Figure 5 The spring 330 is sleeved on the outer circumference of the outer shaft 110 , and the outer shaft 110 can limit the direction of contraction and extension of the spring 330 , thereby ensuring the accuracy of the direction in which the spring 330 drives the lock ring 310 to move.

[0081] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shaft locking structure, characterized in that: include: A first connecting portion (100) and a second connecting portion (200), wherein the first connecting portion (100) and the second connecting portion (200) are coaxially rotatably connected to each other; A locking portion (300), the locking portion (300) being movably sleeved on the outside of the first connecting portion (100) and the second connecting portion (200); When the locking portion (300) rotates around the first connecting portion (100) and the second connecting portion (200) by a preset angle in the circumferential direction, and then moves along the axial direction of the first connecting portion (100) and the second connecting portion (200) by a preset distance, the locking portion (300) is respectively snap-connected with the first connecting portion (100) and the second connecting portion (200).

2. The shaft locking structure according to claim 1, characterized in that: The first connecting portion (100) is an outer shaft (110), and the second connecting portion (200) is an inner shaft (210); One end of the inner shaft (210) is sleeved inside the outer shaft (110) in a rotatable manner along the axial direction of the outer shaft (110).

3. The shaft locking structure according to claim 2, characterized in that: An internal thread is provided on the inner wall of the outer shaft (110), and an external thread is provided on the outer wall of the inner shaft (210), and the internal thread and the external thread are adapted to each other.

4. The shaft locking structure according to claim 2, characterized in that: The locking portion (300) comprises: A locking ring (310), wherein the locking ring (310) is movably sleeved on the outer circumference of the outer shaft (110) and the inner shaft (210) along the axial direction of the outer shaft (110) and the inner shaft (210); The inner wall of the locking ring (310) can be snap-fitted with the outer shaft (110) and the inner shaft (210).

5. The shaft locking structure according to claim 4, characterized in that: A first protrusion (111) is provided on the outer wall of the outer shaft (110); A first groove (311) is formed on the inner wall of the locking ring (310) along the axial direction of the locking ring (310); The first groove (311) and the first protrusion (111) can be clamped together.

6. The shaft locking structure according to claim 5, characterized in that: A second protrusion (211) is provided on the outer wall of the inner shaft (210); A second groove (312) is formed on the inner wall of the locking ring (310) along the axial direction of the locking ring (310); The second groove (312) and the second protrusion (211) can be arranged in a snap-fitting manner; When the first protrusion (111) is engaged with the first groove (311), the second protrusion (211) is also engaged with the second groove (312).

7. The shaft locking structure according to claim 6, characterized in that: There are a plurality of the first grooves (311), and the plurality of the first grooves (311) are evenly arranged around the circumference of the locking ring (310); There are a plurality of the second grooves (312), and the plurality of the second grooves (312) are evenly arranged around the circumference of the locking ring (310); The plurality of first grooves (311) and the plurality of second grooves (312) are arranged in a one-to-one correspondence; Part of the first grooves (311) are blind grooves; Alternatively, part of the second groove (312) is a blind groove; Alternatively, some of the first grooves (311) and the second grooves (312) that are arranged correspondingly are blind grooves.

8. The shaft locking structure according to claim 5, characterized in that: A third groove (212) is provided on the outer wall of the inner shaft (210); A hook (313) is provided on the inner wall of the lock ring (310); The third groove (212) and the hook (313) can be arranged in a locking manner; When the first protrusion (111) is engaged with the first groove (311), the hook (313) is engaged with the third groove (212).

9. The shaft locking structure according to claim 8, characterized in that: There are a plurality of the first grooves (311), and the plurality of the first grooves (311) are evenly arranged around the circumference of the locking ring (310); There are a plurality of the third grooves (212), and the plurality of the third grooves (212) are evenly arranged around the circumference of the inner shaft (210); The plurality of first grooves (311) and the plurality of third grooves (212) are arranged in one-to-one correspondence; Part of the first grooves (311) are blind grooves.

10. The shaft locking structure according to any one of claims 4 to 9, characterized in that: The locking portion (300) further comprises: A backing ring (320), wherein the backing ring (320) is fixedly sleeved on the outer periphery of the outer shaft (110) along the axial direction of the outer shaft (110), and a driving cavity is enclosed by the backing ring (320) and the locking ring (310); A spring (330), wherein the spring (330) is disposed in the driving cavity, and two ends of the spring (330) are respectively connected to the gasket (320) and the lock ring (310).

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