Anti-falling type output shaft structure capable of being rapidly disassembled and assembled and method

Abstract

The anti-falling type output shaft structure comprises a clutch inner sleeve, an output shaft and a steel wire baffle ring, an internal spline is arranged at the middle end of the inner wall of the clutch inner sleeve, a first bevel edge is arranged at one end of the internal spline, a second bevel edge is arranged at the other end of the internal spline, and a starter connecting end is arranged at one end of the clutch inner sleeve. The output shaft comprises a shaft body, a second outer spline is arranged at one end of the shaft body, a limiting baffle is arranged at the end, close to the second outer spline, of the shaft body, a first outer spline is arranged at the end, away from the second outer spline, of the shaft body, a check ring groove is formed in one end of the first outer spline, and the steel wire check ring is connected and arranged in the check ring groove. A connecting spline is arranged at one end of the inner wall of the output shaft, the first outer spline is connected with the inner spline in a meshed mode, and the end, away from the starter connecting end, of the clutch inner sleeve abuts against the limiting baffle. Installation is convenient and fast, the connection stability can be effectively guaranteed, time and labor are saved during disassembly, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of shaft coupling mechanisms, and in particular to a structure and method for quickly disassembling and assembling an output shaft that is prevented from falling off. Background Art

[0002] Before the plane takes off, the engine needs to be started to ensure its normal operation. Aircraft engines usually require a higher speed to work properly, but they cannot directly provide sufficient speed during the starting process. Therefore, the role of the air turbine starter is to drive the engine's rotor by providing high-pressure airflow. It generates high-pressure airflow through high-speed rotating turbine blades and sends the airflow into the engine, so that the engine starts to rotate and eventually starts.

[0003] The power output device of the air turbine starter is connected to the spline inside the aircraft engine through the output shaft. The current connection methods between the power output device and the aircraft engine include gear transmission, elastic coupling, coupling and conveyor belt.

[0004] However, the above-mentioned connection relationships are troublesome to install and disassemble. During maintenance or when the output shaft is twisted off, it is impossible to quickly check and replace it, which reduces work efficiency. The present invention aims to design a structure and method that is easy to disassemble and install, can be quickly replaced, and can prevent the output shaft from falling off, so that the starter can be disassembled, maintained or the output shaft is twisted off, so that the output shaft can be easily and quickly checked or replaced. Summary of the invention

[0005] The object of the present invention is to provide a structure and method for quickly disassembling an output shaft that can prevent it from falling off, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: comprising a clutch inner sleeve, an output shaft and a wire retaining ring, wherein the middle end of the inner wall of the clutch inner sleeve is provided with an internal spline, one end of the internal spline is provided with a bevel first, and the other end is provided with a bevel second, and one end of the clutch inner sleeve is provided with a starter connection end;

[0007] The output shaft includes a shaft body, one end of the shaft body is provided with external spline 2, the end of the shaft body close to external spline 2 is provided with a limit baffle, the end of the shaft body away from external spline 2 is provided with external spline 1, one end of the external spline 1 is provided with a retaining ring groove, and the steel wire retaining ring is connected and arranged in the retaining ring groove.

[0008] Preferably, a connecting spline is provided at one end of the inner wall of the output shaft.

[0009] Preferably, the outer spline 1 is meshedly connected with the inner spline, and the end of the clutch inner sleeve away from the starter connection end is against the limit baffle.

[0010] Preferably, the outer ring of the inner sleeve of the clutch corresponds to the position between the inner spline and the starter connection end, and a reinforced end is provided in the connection.

[0011] A method for using an output shaft that can be quickly disassembled and assembled to prevent it from falling off comprises the following steps:

[0012] Step 1: When installing the starter, the clutch inner sleeve is installed inside the air turbine starter reducer component and fixed. When the starter is installed with the output shaft, first install the wire retaining ring in the retaining ring groove of the output shaft, and then insert the output shaft into the clutch inner sleeve. The outer splines on the surface of the output shaft fit together under the guidance of the inner splines in the clutch inner sleeve, and the shaft moves inward along the inner splines in the clutch inner sleeve;

[0013] Step 2: When the output shaft hits the beveled edge 2 on one side of the internal spline, apply a little force, and the wire retaining ring will be compressed under the guidance of the beveled edge 2. When the diameter of the wire retaining ring is compressed to be smaller than the diameter of the internal spline in the clutch inner sleeve, the output shaft can continue to move inward along the internal spline in the clutch inner sleeve. When the external spline 1 on the surface of the output shaft moves to the beveled edge 1 beyond one end of the internal spline in the clutch inner sleeve, the wire retaining ring will pop open, and the output shaft will be installed in place. At this time, the wire retaining ring will clamp the output shaft to prevent the output shaft from falling off;

[0014] Step 3: When the starter needs to replace the output shaft, gently pull the shaft outward, and the shaft will move outward along the internal splines in the clutch inner sleeve; when the wire retaining ring touches the beveled edge of the clutch inner sleeve, apply a little force, and the wire retaining ring will be compressed under the guidance of the beveled edge of the clutch inner sleeve. When the diameter of the wire retaining ring is compressed to be smaller than the diameter of the internal splines in the clutch inner sleeve, the output shaft will be pulled out and the disassembly is completed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the present invention is installed through the starter, the clutch inner sleeve is installed inside the air turbine starter reducer component and fixed. When the starter is installed with the output shaft, the wire retaining ring is first installed in the retaining ring groove of the output shaft, and then the output shaft is inserted into the clutch inner sleeve. The outer spline 1 on the surface of the output shaft fits together under the guidance of the inner spline in the clutch inner sleeve, and the shaft moves inward along the inner spline in the clutch inner sleeve. When the output shaft hits the bevel 2 on one side of the inner spline, a little force is applied, and the wire retaining ring will be compressed under the guidance of the bevel 2. When the diameter of the wire retaining ring is compressed to be smaller than the diameter of the inner spline in the clutch inner sleeve, the output shaft can continue to move inward along the inner spline in the clutch inner sleeve. When the outer spline 1 on the surface of the output shaft moves to the bevel 1 beyond one end of the inner spline in the clutch inner sleeve, the wire retaining ring will pop open, and the output shaft will be installed in place. At this time, the wire retaining ring clamps the output shaft to prevent the output shaft from falling off. The installation is convenient and quick, and the connection stability can be effectively guaranteed.

[0017] 2. When the output shaft of the starter needs to be replaced, the shaft body is gently pulled outward, and the shaft body moves outward along the internal splines in the clutch inner sleeve; when the wire retaining ring hits the beveled edge in the clutch inner sleeve, a little force is applied, and the wire retaining ring is compressed under the guidance of the beveled edge in the clutch inner sleeve. When the diameter of the wire retaining ring is compressed to be smaller than the diameter of the internal splines in the clutch inner sleeve, the output shaft will be pulled out, and the disassembly is completed. The disassembly saves time and effort, and effectively improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of an anti-falling type output shaft structure that can be quickly disassembled and assembled according to the present invention;

[0019] Figure 2 It is a schematic diagram of the side section structure of a clutch inner sleeve in an anti-falling type output shaft structure capable of rapid disassembly and assembly according to the present invention;

[0020] Figure 3 It is a structural schematic diagram of an output shaft in an anti-falling type output shaft structure capable of rapid disassembly and assembly according to the present invention;

[0021] Figure 4 This is a schematic diagram of the structure before installation of an anti-falling type output shaft structure that can be quickly disassembled and assembled according to the present invention;

[0022] Figure 5 The present invention is a schematic diagram of the structure of an anti-falling type output shaft structure that can be quickly disassembled and assembled after installation.

[0023] In the figure: 1. clutch inner sleeve; 12. inner spline; 13. bevel edge 1; 14. bevel edge 2; 15. starter connection end; 2. output shaft; 21. shaft body; 22. outer spline 2; 23. limit baffle; 24. outer spline 1; 25. retaining ring groove; 3. wire retaining ring; 4. reinforcement end; 5. connecting spline. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0025] See also Figure 1-5 The present invention provides a technical solution: comprising a clutch inner sleeve 1, an output shaft 2 and a wire retaining ring 3, an inner spline 12 is provided at the middle end of the inner wall of the clutch inner sleeve 1, a bevel 13 is provided at one end of the inner spline 12, and a bevel 2 14 is provided at the other end, and a starter connection end 15 is provided at one end of the clutch inner sleeve 1;

[0026] The output shaft 2 includes a shaft body 21, one end of the shaft body 21 is provided with an external spline 22, the end of the shaft body 21 close to the external spline 22 is provided with a limit baffle 23, the end of the shaft body 21 away from the external spline 22 is provided with an external spline 1 24, one end of the external spline 1 24 is provided with a retaining ring groove 25, and a steel wire retaining ring 3 is connected and arranged in the retaining ring groove 25, wherein the steel wire retaining ring 3 is made of carbon structural steel, and the output shaft 2 and the clutch inner sleeve 1 are made of low-alloy ultra-high strength steel as a whole.

[0027] A connecting spline 5 is provided at one end of the inner wall of the output shaft 2 for engaging with the spline of the aircraft engine to ensure connection stability.

[0028] The outer spline 24 is meshed with the inner spline 12, and the end of the clutch inner sleeve 1 away from the starter connection end 15 is against the limit baffle 23, ensuring the connection stability and the connection fixation effect between the output shaft 2 and the clutch inner sleeve 1.

[0029] The outer ring of the clutch inner sleeve 1 corresponds to the position between the inner spline 12 and the starter connection end 15, and a reinforced end 4 is provided at the connection to ensure the overall use strength and transmission stability.

[0030] A method for using an output shaft that can be quickly disassembled and assembled to prevent it from falling off comprises the following steps:

[0031] Step 1: When installing the starter, the clutch inner sleeve 1 is installed inside the air turbine starter reducer component and fixed. When the starter is installed with the output shaft 2, the wire retaining ring 3 is first installed in the retaining ring groove 25 of the output shaft 2, and then the output shaft 2 is inserted into the clutch inner sleeve 1. The outer spline 24 on the surface of the output shaft 2 is guided by the inner spline 12 in the clutch inner sleeve 1 and fits together. The shaft body 21 moves inward along the inner spline 12 in the clutch inner sleeve 1.

[0032] Step 2: When the output shaft 2 hits the bevel 14 on one side of the internal spline 12, apply a little force, and the wire retaining ring 3 will be compressed under the guidance of the bevel 14. When the diameter of the wire retaining ring 3 is compressed to be smaller than the diameter of the internal spline 12 in the clutch inner sleeve 1, the output shaft 2 can continue to move inward along the internal spline 12 in the clutch inner sleeve 1. When the external spline 24 on the surface of the output shaft 2 moves to the bevel 13 at one end of the internal spline 12 in the clutch inner sleeve 1, the wire retaining ring 3 will pop open, and the output shaft 2 will be installed in place. At this time, the wire retaining ring 3 clamps the output shaft 2 to prevent the output shaft 2 from falling off;

[0033] Step 3: When the starter output shaft 2 needs to be replaced, gently pull the shaft body 21 outward, and the shaft body 21 moves outward along the internal spline 12 in the clutch inner sleeve 1; when the wire retaining ring 3 hits the bevel 13 in the clutch inner sleeve 1, apply a little force, and the wire retaining ring 3 is compressed under the guidance of the bevel 13 in the clutch inner sleeve 1. When the diameter of the wire retaining ring 3 is compressed to be smaller than the diameter of the internal spline 12 in the clutch inner sleeve 1, the output shaft 2 will be pulled out and the disassembly is completed.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A structure for preventing a falling-off type output shaft that can be quickly disassembled and assembled, comprising a clutch inner sleeve (1), an output shaft (2) and a wire retaining ring (3), characterized in that: An inner spline (12) is provided at the middle end of the inner wall of the clutch inner sleeve (1), one end of the inner spline (12) is provided with a first bevel (13), and the other end is provided with a second bevel (14), and one end of the clutch inner sleeve (1) is provided with a starter connection end (15); The output shaft (2) comprises a shaft body (21), one end of the shaft body (21) is provided with an external spline 2 (22), one end of the shaft body (21) close to the external spline 2 (22) is provided with a limit baffle (23), one end of the shaft body (21) away from the external spline 2 (22) is provided with an external spline 1 (24), one end of the external spline 1 (24) is provided with a retaining ring groove (25), and the wire retaining ring (3) is connected and arranged in the retaining ring groove (25).

2. The anti-falling type output shaft structure and method according to claim 1, characterized in that: A connecting spline (5) is provided at one end of the inner wall of the output shaft (2).

3. The anti-falling type output shaft structure and method according to claim 1, characterized in that: The outer spline 1 (24) is meshedly connected with the inner spline (12), and the end of the clutch inner sleeve (1) away from the starter connection end (15) abuts against the limit baffle (23).

4. The anti-falling type output shaft structure and method according to claim 1, characterized in that: The outer ring of the clutch inner sleeve (1) corresponds to the position between the inner spline (12) and the starter connection end (15), and is connected with a reinforcement end (4).

5. A method for using a quick-disassembly output shaft structure that prevents falling off, characterized in that: The following steps are involved: The first step is to install the starter, install the clutch inner sleeve (1) inside the air turbine starter reducer component and fix it. When the starter is installed with the output shaft (2), first install the wire retaining ring (3) in the retaining ring groove (25) of the output shaft (2), and then insert the output shaft (2) into the clutch inner sleeve (1). The outer spline (24) on the surface of the output shaft (2) fits together under the guidance of the inner spline (12) in the clutch inner sleeve (1), and the shaft body (21) moves inward along the inner spline (12) in the clutch inner sleeve (1); Step 2: When the output shaft (2) hits the beveled edge 2 (14) on one side of the internal spline (12), apply a little force and the wire retaining ring (3) will be compressed under the guidance of the beveled edge 2 (14). When the diameter of the wire retaining ring (3) is compressed to be smaller than the diameter of the internal spline (12) in the clutch inner sleeve (1), the output shaft (2) can continue to move inward along the internal spline (12) in the clutch inner sleeve (1). When the external spline 1 (24) on the surface of the output shaft (2) moves beyond the beveled edge 1 (13) at one end of the internal spline (12) in the clutch inner sleeve (1), the wire retaining ring (3) will pop open and the output shaft (2) will be installed in place. At this time, the wire retaining ring (3) will clamp the output shaft (2) to prevent the output shaft (2) from falling off. Step 3: When the output shaft (2) of the starter needs to be replaced, gently pull the shaft body (21) outwards, and the shaft body (21) moves outwards along the internal splines (12) in the clutch inner sleeve (1); when the wire retaining ring (3) hits the beveled edge (13) in the clutch inner sleeve (1), slightly apply force, and the wire retaining ring (3) is compressed under the guidance of the beveled edge (13) in the clutch inner sleeve (1). When the diameter of the wire retaining ring (3) is compressed to be smaller than the diameter of the internal splines (12) in the clutch inner sleeve (1), the output shaft (2) is pulled out, and the disassembly is completed.

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