Device for measuring gap between shaft sleeve assembly and shaft assembly of tail rotor hub

Abstract

The invention relates to the technical field of tail rotor hub measurement, in particular to a device for measuring a gap between a shaft sleeve assembly and a shaft assembly of a tail rotor hub. The device for measuring the gap between the shaft sleeve assembly and the shaft assembly of the tail rotor hub comprises a supporting seat, a locking piece and a first mounting assembly. An assembly formed by the shaft sleeve assembly and the shaft assembly is installed on the rotating seat through the first installation assembly, after the gap between the first shaft sleeve of the shaft sleeve assembly and the shaft assembly is measured, the rotating seat is rotated to the next angle relative to the supporting seat, and the rotating seat is locked on the supporting seat through the locking piece. The gap between the first shaft sleeve and the shaft assembly is measured again, the measurement steps are repeated after measurement of the gap between the first shaft sleeve and the shaft assembly is completed, and the gap between the second shaft sleeve of the shaft sleeve assembly and the shaft assembly is measured. The rotating seat drives the assembly to switch between the two measurement angles through the first installation assembly, the assembly does not need to be rotated manually, and operation is convenient.

Description

Technical Field

[0001] This application relates to the field of tail rotor hub measurement technology, and in particular to a device for measuring the gap between a tail rotor hub bushing assembly and a shaft assembly. Background Technology

[0002] The tail rotor hub, as an intermediate component, serves as a connector, supporting the tail rotor blades and transmitting power to enable their rotation around their axis. Through the tail rotor hub, the counter-torque generated by the tail rotor blades is effectively transmitted to the helicopter fuselage, counteracting the rotational effects of the main rotor and maintaining the helicopter's flight stability. Therefore, the tail rotor hub is crucial to the overall performance of the helicopter.

[0003] The tail rotor hub consists of a bushing assembly and a shaft assembly. During flight, the bushing assembly transmits centrifugal and aerodynamic forces, which change periodically during operation. This causes repeated friction and impact between the bushing and shaft assemblies, leading to wear over time, decreased dimensional accuracy, and increased clearance, thus affecting the normal operation of the tail rotor hub. Therefore, it is necessary to periodically measure the clearance between the tail rotor hub shaft assembly and the bushing assembly. When the clearance exceeds the product requirement, the bushing in the bushing assembly needs to be replaced to ensure the normal operation of the tail rotor hub. The bushing assembly includes two bushings located on both sides of the shaft assembly. The clearance of each bushing needs to be measured at two angles at two different locations. Currently, this measurement is done manually using existing tools, requiring repeated rotation of the shaft and bushing assemblies at different angles, which is inconvenient. Summary of the Invention

[0004] This application provides a device for measuring the gap between a tail rotor hub bushing assembly and a shaft assembly, in order to solve the problem of inconvenience in measuring the gap between the bushing assembly and the shaft assembly in the prior art.

[0005] This application provides a device for measuring the gap between a tail rotor hub bushing assembly and a shaft assembly, comprising: a support base; a rotating base rotatably connected to the support base and having a mounting cavity; a locking member detachably connected to the support base and the rotating base to lock the rotating base relative to the support base; and a first mounting assembly disposed within the mounting cavity, the first mounting assembly being configured to fix the assembly formed by the bushing assembly and the shaft assembly relative to the rotating base.

[0006] Preferably, the support base has an arc-shaped groove, and the rotating base has an arc-shaped slide rail, with the slide rail slidingly fitted within the groove.

[0007] Preferably, the support base has a first locking hole, the rotating base has a second locking hole, and there are multiple first or second locking holes. The locking member is formed in the shape of a rod. When the rotating base rotates to the point where a second locking hole is coaxial with a first locking hole, the locking member is inserted into the first locking hole and the second locking hole.

[0008] Preferably, the first mounting assembly includes a support plate and a first connecting rod disposed on the support plate. The support plate is inclined, and the first connecting rod is perpendicular to the support plate. The first connecting rod is configured to pass through an inclined shaft hole on the shaft assembly.

[0009] Preferably, the first connecting rod has an external thread, and the first mounting assembly further includes a first locking nut threaded to the external thread, with the first locking nut and the support plate forming an area for mounting the shaft assembly.

[0010] Preferably, the tail rotor hub bushing assembly and shaft assembly clearance measuring device further includes a fixing component that is movably disposed relative to the rotating seat, the fixing component being driven to fix the assembly within the mounting cavity.

[0011] Preferably, the fixing assembly includes a clamping member and a rotating rod connected to the clamping member. The clamping member is located inside the mounting cavity, and a portion of the rotating rod is located inside the mounting cavity and another portion is located outside the mounting cavity. External threads are formed on the rotating rod, and a screw hole is formed on the rotating seat for threaded connection of the rotating rod. The rotating rod can be driven to rotate relative to the rotating seat, thereby driving the clamping member to move within the mounting cavity to clamp the assembly within the mounting cavity.

[0012] Preferably, the tail rotor hub bushing assembly and shaft assembly clearance measuring device further includes a base and a second mounting assembly slidably connected to the base. The support is fixed on the base, and the second mounting assembly is configured to mount the measuring instrument and be driven to slide on the base relative to the support.

[0013] Preferably, the second mounting assembly includes a second connecting rod and a second locking nut disposed on the second connecting rod. The second connecting rod is slidably fitted to the base and has an external thread formed thereon. The second locking nut is threadedly connected to the external thread to fix the second connecting rod relative to the base. The second connecting rod has a mounting hole for the measuring end of the measuring instrument to pass through.

[0014] Preferably, there are multiple second installation components, with at least two second installation components arranged in parallel.

[0015] The beneficial effects of this application are as follows:

[0016] The assembly formed by the bushing assembly and the shaft assembly is mounted on the rotating seat via the first mounting component. After measuring the clearance between the first bushing and the shaft assembly, the rotating seat is rotated to the next angle relative to the support seat, and locked onto the support seat by the locking component. The clearance between the first bushing and the shaft assembly is measured again. The measurement of the clearance between the first bushing and the shaft assembly is now complete. The above measurement steps are repeated to measure the clearance between the second bushing and the shaft assembly. The rotating seat drives the assembly to switch between the two measurement angles via the first mounting component, eliminating the need for manual rotation of the assembly and making operation convenient. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A front view of the tail rotor hub bushing assembly and shaft assembly clearance measuring device and assembly provided in the embodiments of this application;

[0019] Figure 2 for Figure 1 The left view;

[0020] Figure 3 This is a front view of the tail rotor hub bushing assembly and shaft assembly clearance measuring device provided in an embodiment of this application;

[0021] Figure 4 for Figure 3 The left view;

[0022] Figure 5 for Figure 3 Top view.

[0023] Figure label:

[0024] 10. Support base; 11. First fixing screw; 12. First fixing pin;

[0025] 20. Rotating seat; 21. Mounting cavity; 22. Slide rail; 30. Locking element;

[0026] 40. First mounting component; 41. Support plate; 42. First connecting rod; 43. First locking nut; 44. Second fixing pin; 45. Second fixing pin; 46. Washer;

[0027] 50. Fixing component; 51. Clamping element; 52. Rotating rod; 53. Handle;

[0028] 60. Base; 61. Sliding hole;

[0029] 70. Second mounting component; 71. Second connecting rod; 711. Mounting hole; 72. Second locking nut;

[0030] 9. Assembly; 91. Bushing assembly; 911. First bushing; 912. Second bushing; 92. Shaft assembly. Detailed Implementation

[0031] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The following is combined Figures 1 to 5 This application describes a tail rotor hub bushing assembly and shaft assembly clearance measuring device provided in an embodiment of the present application, comprising: a support base 10; a rotating base 20 rotatably connected to the support base 10 and having a mounting cavity 21; a locking member 30 detachably connected to the support base 10 and the rotating base 20 to lock the rotating base 20 relative to the support base 10; and a first mounting assembly 40 disposed in the mounting cavity 21, the first mounting assembly 40 being configured to fix the assembly 9 formed by the bushing assembly 91 and the shaft assembly 92 relative to the rotating base 20.

[0033] It should be noted that, as Figure 2 As shown, the shaft assembly 92 includes a shaft and a protrusion extending from the side of the shaft. An angle exists between the axial direction of the protrusion and the axial direction of the shaft. The protrusion has a through-hole along its own axial direction. The bushing assembly 91 includes a first bushing 911 and a second bushing 912 fitted onto both ends of the shaft. The first bushing 911 and the second bushing 912 have the same structure, both being cylindrical sleeves with an annular protrusion protruding from their outer circumference. The process of measuring the gap between the bushing assembly 91 and the shaft assembly 92 is as follows: First, the collar of the measuring tool is fitted onto the portion of the first bushing 911 without the annular protrusion. Force is applied radially to the first bushing 911, and the result is recorded. After taking the measurement reading, use the collar of the measuring instrument to fit around the annular protrusion of the first bushing 911, apply radial force to the first bushing 911, and record the measurement reading. Rotate the assembly 990° around an axis parallel to the shaft axis, and again use the measuring instrument to fit around the outer circumference of the part of the first bushing 911 without the annular protrusion and the outer circumference of the annular protrusion, and apply radial force to the first bushing 911, and record the measurement reading. The gap measurement between the first bushing 911 and the shaft assembly 92 is now complete. Repeat the above steps to measure the gap between the second bushing 912 and the shaft assembly 92.

[0034] The assembly 9 is fixed to the rotating seat 20 by the first mounting component 40. After measuring the gap between the portion of the first bushing 911 without the annular protrusion and the portion with the annular protrusion and the shaft assembly 92 using a measuring tool, the rotating seat 20 is rotated 90°, causing the assembly 9 to rotate 90°. Then, the rotating seat 20 is locked to the support seat 10 by the locking component 30, making the two relatively fixed and preventing the rotating seat 20 from rotating relative to the support seat 10 when force is applied to the bushing during the measurement process. The above steps are repeated to measure the gap between the second bushing 912 and the shaft assembly 92. Throughout the measurement process, the rotating seat 20 drives the assembly 9 to rotate, enabling the measurement of the gap between the bushing assembly 91 and the shaft assembly 92 at different angles. No manual rotation of the assembly 9 is required, making the operation convenient.

[0035] Please refer to Figures 1 to 4 ,in, Figure 1 and Figure 3 All are front views of the tail rotor hub bushing assembly and shaft assembly clearance measuring device provided in the embodiments of this application. Figure 1 It is equipped with assembly part 9. Figure 2 and Figure 4 All are left views of the tail rotor hub bushing assembly and shaft assembly clearance measuring device provided in the embodiments of this application. Figure 2 It is equipped with assembly component 9.

[0036] In some embodiments provided in this application, the support base 10 has an arc-shaped groove, and the rotating base 20 has an arc-shaped slide rail 22, which slides in the groove.

[0037] The rotating seat 20 and the support seat 10 are rotatably connected through the cooperation of the arc-shaped sliding groove and the arc-shaped sliding rail 22. Compared with the shaft hole rotatable connection, on the one hand, the space of the part of the rotating seat 20 without the sliding rail 22 is released, thereby providing space for the assembly 9 installed on the first mounting component 40; on the other hand, the contact area between the rotating seat 20 and the support seat 10 is reduced, thereby reducing the friction between the two and making the rotation of the rotating seat 20 smoother.

[0038] Specifically, such as Figure 4 As shown, two slide rails 22 are arranged side by side, and the slide grooves are formed into two stepped structures, which respectively cooperate with the two slide rails 22.

[0039] Please refer to Figures 1 to 5 ,in, Figure 5 A top view of the tail rotor hub bushing assembly and shaft assembly clearance measuring device provided in an embodiment of this application.

[0040] In some embodiments provided in this application, the support base 10 has a first locking hole, the rotating base 20 has a second locking hole, and multiple first or second locking holes are provided. The locking member 30 is formed in the shape of a rod. When the rotating base 20 rotates to the point where a second locking hole is coaxial with a first locking hole, the locking member 30 is inserted into the first locking hole and the second locking hole.

[0041] Taking a scenario where there is one first locking hole and multiple second locking holes, the rotating seat 20 needs to reciprocate between two positions relative to the support seat 10. In the first position, one second locking hole is coaxial with the first locking hole, and the locking member 30 is inserted into both the first and second locking holes, locking the rotating seat 20 in the first position. After the gap measurement is completed, the locking member 30 is removed from the support seat 10 and the rotating seat 20, and the rotating seat 20 is rotated to the second position. At this time, another second locking hole is coaxial with the first locking hole, and the locking member 30 is inserted into both the first and second locking holes, locking the rotating seat 20 in the second position for gap measurement. The locking process is convenient and quick, which can speed up the gap measurement and improve efficiency.

[0042] Specifically, there is one first locking hole and two second locking holes. When the rotating seat is in the first position, one of the second locking holes is coaxial with the first locking hole. After rotating the rotating seat 20 by 90°, the rotating seat is in the second position, and the other second locking hole is coaxial with the first locking hole. The locking element 30 can be a pin, with the first and second locking holes being pin holes; or the locking element 30 can be a screw, with the first and second locking holes being screw holes.

[0043] Please continue reading. Figures 1 to 5 In some embodiments provided in this application, the first mounting assembly 40 includes a support plate 41 and a first connecting rod 42 disposed on the support plate 41. The support plate 41 is inclined, and the first connecting rod 42 is perpendicular to the support plate 41. The first connecting rod 42 is configured to pass through an inclined shaft hole on the shaft assembly 92.

[0044] The inclined arrangement of the support plate 41 is designed to accommodate the protrusion of the shaft assembly 92. When the axial hole of the protrusion is fitted onto the first connecting rod 42, the bottom of the protrusion forms a surface contact with the support plate 41, which provides support. The inclination angle of the support plate 41 is adapted to the angle between the axial direction of the protrusion and the axial direction of the shaft, ensuring that after the axial hole of the protrusion is fitted onto the first connecting rod 42, the axial direction of the shaft is horizontal. This also ensures that the axial directions of the first bushing 911 and the second bushing 912 of the bushing assembly 91 are horizontal, allowing for the application of radial force along the first bushing 911 and the second bushing 912 to measure the gap between them and the shaft assembly 92. In other words, the positional relationship between the support plate 41 and the first connecting rod 42 relative to the rotating seat 20 is designed to adapt to the structure of the shaft assembly 92 itself, enhancing its specialization, and thereby ensuring that the axial directions of the first bushing 911 and the second bushing 912 of the bushing assembly 91 are horizontal.

[0045] Specifically, such as Figure 2 and Figure 4 As shown, the support plate 41 and the rotating seat 20 are connected by a second fixing pin 44 and a second fixing pin 45. The support plate 41 and the rotating seat 20 are provided with coaxial screw holes and pin holes. The second fixing pin 44 is a screw that is screwed into the screw holes of both the support plate 41 and the rotating seat 20. The second fixing pin 45 is a pin that is inserted into the pin holes of both the support plate 41 and the rotating seat 20. The support plate 41 is provided with two screw holes and two pin holes. The rotating seat 20 is provided with two screw holes corresponding to the screw holes of the support plate 41 and two pin holes corresponding to the pin holes of the support plate 41. There are also two second fixing pins 44 and two fixing pins 45.

[0046] Please continue reading. Figures 1 to 5 In some embodiments provided in this application, the first connecting rod 42 has an external thread, and the first mounting assembly 40 also includes a first locking nut 43 threaded to the external thread, and the first locking nut 43 and the support plate 41 form an area for mounting the shaft assembly 92.

[0047] Before connecting the shaft assembly 92 to the first connecting rod 42, remove the first locking nut 43 from the first connecting rod 42. The shaft assembly 92 is then fitted onto the first connecting rod 42 from top to bottom through the shaft hole, with the upper part of the first connecting rod 42 protruding outside the shaft hole. Tighten the first locking nut 43 onto the first connecting rod 42, and continue screwing it in the direction toward the shaft assembly 92 until the first locking nut 43 is pressed firmly onto the shaft assembly 92, thereby fixing the shaft assembly 92 onto the first connecting rod 42. The first locking nut 43 is used to securely fix the shaft assembly 92 onto the rotating seat 20, preventing the shaft assembly 92 from moving when the shaft sleeve assembly 91 is subjected to force during measurement.

[0048] The first mounting assembly 40 also includes a gasket 46, which is disposed on the side of the first locking nut 43 facing the support plate 41. When the shaft assembly 92 is mounted on the first mounting assembly 40, the gasket 46 is located between the shaft assembly 92 and the first locking nut 43, serving as a soft connection and buffer.

[0049] Please continue reading. Figures 1 to 5 In some embodiments provided in this application, the tail rotor hub bushing assembly and shaft assembly clearance measuring device further includes a fixing component 50 movably disposed relative to the rotating seat 20, the fixing component 50 being drivable to fix the assembly 9 within the mounting cavity 21.

[0050] The first mounting component 40 is used to fix the shaft assembly 92 to the rotating seat 20 in the axial direction of the shaft hole, and the fixing component 50 is used to fix the shaft assembly 92 to the rotating seat 20 in the radial direction of the shaft hole. That is, the shaft assembly 92 is fixed to the rotating seat 20 by the first mounting component 40 and the fixing component 50 applying force in different directions, thereby increasing the connection stability between the shaft assembly 92 and the rotating seat 20.

[0051] Please continue reading. Figures 1 to 5 In some embodiments provided in this application, the fixing component 50 includes a clamping member 51 and a rotating rod 52 connected to the clamping member 51. The clamping member 51 is located inside the mounting cavity 21, and a portion of the rotating rod 52 is located inside the mounting cavity 21, while another portion is located outside the mounting cavity 21. An external thread is formed on the rotating rod 52. A threaded hole is formed on the rotating seat 20 for threaded connection of the rotating rod 52. The rotating rod 52 can be driven to rotate relative to the rotating seat 20, thereby driving the clamping member 51 to move within the mounting cavity 21 to clamp the assembly 9 within the mounting cavity 21.

[0052] Rotating rod 52 rotates, and through its threaded connection with rotating seat 20, it drives clamping member 51 to move horizontally in a direction toward or away from the first mounting assembly 40. Clamping member 51 is directly opposite one cavity wall of mounting cavity 21. When assembly 9 is connected to the first mounting assembly 40, clamping member 51 can press against assembly 9 under the action of rotating rod 52, clamping assembly 9 between clamping member 51 and cavity wall of mounting cavity 21.

[0053] Specifically, the clamping member 51 has a plate-like structure. When the assembly 9 is installed on the first mounting assembly 40, the side of the assembly 9 facing the clamping member 51 is a plane, and the side of the clamping member 51 facing the assembly 9 is also a plane. The two planes fit together, increasing the contact area and thus increasing the installation stability of the assembly 9. The fixing assembly 50 also includes a handle 53. One end of the rotating rod 52 is connected to the clamping member 51, and the other end is connected to the handle 53. The clamping member 51 has a screw hole, and one end of the rotating rod 52 is threadedly connected to the clamping member 51 through the screw hole. When the rotating rod 52 rotates, it can rotate relative to the clamping member 51, so that the clamping member 51 can only move horizontally in the direction towards or away from the first mounting assembly 40. The handle 53 is perpendicular to the rotating rod 52. One function of the handle 53 is to drive the rotating rod 52 to rotate by rotation, that is, to apply a rotational force to the rotating rod 52. Another function is to drive the rotating seat 20 to rotate relative to the support seat 10 by lifting or pressing, that is, to apply a rotational force to the rotating seat 20.

[0054] Please continue reading. Figures 1 to 5 In some embodiments provided in this application, the tail rotor hub bushing assembly and shaft assembly clearance measuring device further includes a base 60 and a second mounting assembly 70 slidably connected to the base 60. The support 10 is fixed on the base 60, and the second mounting assembly 70 is configured to mount the measuring instrument and be driven to slide on the base 60 relative to the support 10.

[0055] The base 60 is used to integrate the support base 10 and the second mounting component 70. The second mounting component 70 is used to connect the measuring instrument. Its position is adapted to the position of a bushing of the bushing assembly 91 after the assembly 9 is installed on the first mounting component 40. This bushing is the bushing to be measured. After the measuring instrument is installed on the second mounting component 70, it is only necessary to slide along the base 60 to adjust the distance between it and the bushing to be measured. No other position adjustment is required to perform the measurement, saving measurement time and improving measurement efficiency.

[0056] The support base 10 also includes a first fixing nail 11 and a first fixing pin 12. The support base 10 has two screw holes and two pin holes through it. The base 60 has two screw holes and two pin holes coaxial with the screw holes of the support base 10 from bottom to top. The first fixing nail 11 is a screw and there are two of them. Each first fixing nail 11 is screwed into one screw hole of the base 60 and one corresponding screw hole of the support base 10 from bottom to top. The first fixing pin 12 is a pin and there are two of them. Each first fixing pin 12 is inserted into one pin hole of the base 60 and one corresponding pin hole of the support base 10 from bottom to top, thereby realizing the connection between the support base 10 and the base 60.

[0057] Please continue reading. Figures 1 to 5In some embodiments provided in this application, the second mounting assembly 70 includes a second connecting rod 71 and a second locking nut 72 disposed on the second connecting rod 71. The second connecting rod 71 is slidably fitted to the base 60 and has an external thread formed thereon. The second locking nut 72 is threaded to the external thread to fix the second connecting rod 71 relative to the base 60. The second connecting rod 71 has a mounting hole 711 for the measuring end of the measuring instrument to pass through.

[0058] The measuring end of the measuring instrument is equipped with a collar for fitting onto the first bushing 911 or the second bushing 912 of the bushing assembly 91. After the assembly 9 is installed onto the first mounting assembly 40, the measuring end of the measuring instrument passes through the mounting hole 711 on the second connecting rod 71 and slides along the base 60 of the second mounting assembly 70 to change the distance between the measuring instrument and the bushing to be measured. After sliding to a suitable distance, the second connecting rod 71 is fixed relative to the base 60 by locking the nut, and the collar of the measuring instrument is fitted onto the bushing to be measured for gap measurement.

[0059] Specifically, the base 60 is provided with a sliding hole 61, and the bottom end of the second connecting rod 71 is slidably engaged with the sliding hole 61 to slide along the extension direction of the sliding hole 61. After the assembly 9 is installed on the first mounting assembly 40, the axial direction of the shaft assembly 92 is perpendicular to the extension direction of the sliding hole 61. When the second connecting rod 71 slides along the sliding hole 61, the horizontal distance between the second connecting rod 71 and the bushing to be tested in the bushing assembly 91 is changed. Figure 5 As shown, the second mounting component 70 is located on the upper part of the base 60, the rotating seat 20 is located on the lower part of the base 60, and after the shaft assembly 92 is installed on the first mounting component 40, one bushing of the bushing assembly 91 is located on the upper part of the base 60, which is the bushing to be tested, and the other bushing is located on the lower part of the base 60, which is the bushing to be tested after the assembly 9 is rotated 180° and installed on the first mounting component 40. The mounting holes 711 are spaced two apart along the axial direction of the second connecting rod 71. When the rotating seat 20 is in the first position, the measuring tool is installed in the first mounting hole 711. When the rotating seat 20 rotates 90° from the first position to the second position, the distance between the bushing to be tested and the base 60 in the vertical direction (parallel to the axial direction of the second connecting rod 71) will also change. At this time, the measuring tool in the first mounting hole 711 cannot be fitted onto the bushing to be tested and needs to be installed in the second mounting hole 711 before it can be fitted onto the bushing to be tested again. The two mounting holes 711 are set to adapt to the change in the vertical position of the bushing to be tested caused by the rotation of the rotating seat 20.

[0060] Please continue reading. Figures 1 to 5 In some embodiments provided in this application, the second mounting component 70 is configured as a plurality of components, with at least two second mounting components 70 arranged in parallel.

[0061] Two second mounting components 70 are provided, and the sliding holes 61 on the base 60 are configured to correspond one-to-one. One second mounting component 70 is used to measure the gap between the part of the bushing under test without the annular protrusion and the shaft assembly 92, and the other second mounting component 70 is used to measure the gap between the part of the bushing under test with the annular protrusion and the shaft assembly 92. Since the diameter of the annular protrusion of the bushing under test is larger than the diameter of other parts, therefore, as Figure 5 As shown, the sliding holes 61 are offset. The upper second mounting component 70 is used to measure the gap between the part of the bushing under test without the annular protrusion and the shaft assembly 92. Its matching sliding hole 61 is closer to the bushing under test. The lower second mounting component 70 is used to measure the gap between the part of the bushing under test with the annular protrusion and the shaft assembly 92. Its matching sliding hole 61 is farther away from the bushing under test. The offset distance between the two sliding holes 61 is the radial thickness of the annular protrusion.

[0062] The device is used as follows:

[0063] Remove the first locking nut 43 and washer 46 from the first connecting rod 42, fit the shaft hole on the shaft assembly 92 of the component onto the first connecting rod 42, and use the first locking nut 43 to lock the shaft assembly 92.

[0064] Rotate the lever 52 using the handle 53 to drive the clamping member 51 to clamp the assembly 9. At this time, the first bushing 911 is directly opposite the second mounting component 70, which serves as the bushing to be tested.

[0065] Insert the measuring end of the measuring instrument into the mounting hole 711 above the first second connecting rod 71, loosen the second locking nut 72, slide the second connecting rod 71 to find a suitable distance between the measuring instrument and the first bushing 911, put the collar of the measuring instrument on the outer circumference of the first bushing 911 without the annular protrusion, and tighten the second locking nut 72.

[0066] Apply a radial force to the first bushing 911, read and record the gauge reading;

[0067] Remove the measuring instrument from the first second link 71, insert the measuring end of the measuring instrument into the mounting hole 711 above the second second link 71, loosen the second locking nut 72, slide the second link 71 to find a suitable distance between the measuring instrument and the first bushing 911, put the collar of the measuring instrument on the outer circumference of the annular protrusion of the first bushing 911, and tighten the second locking nut 72.

[0068] Apply a radial force to the first bushing 911, read and record the gauge reading;

[0069] Remove the locking piece 30, use the handle 53 to lift the rotating seat 20, making it rotate 90° relative to the support seat 10, and reconnect the locking piece 30;

[0070] Insert the measuring end of the measuring instrument into the mounting hole 711 below the first second connecting rod 71, loosen the second locking nut 72, slide the second connecting rod 71 to find a suitable distance between the measuring instrument and the first bushing 911, put the collar of the measuring instrument on the outer circumference of the first bushing 911 without the annular protrusion, and tighten the second locking nut 72.

[0071] Remove the measuring instrument from the first second link 71, insert the measuring end of the measuring instrument into the mounting hole 711 below the second second link 71, loosen the second locking nut 72, slide the second link 71 to find a suitable distance between the measuring instrument and the first bushing 911, put the collar of the measuring instrument on the outer circumference of the annular protrusion of the first bushing 911, and tighten the second locking nut 72.

[0072] Apply a radial force to the first bushing 911, read and record the gauge reading;

[0073] Remove assembly 9 from first mounting assembly 40, rotate it 180°, fit the shaft hole on the central shaft assembly 92 of the assembly onto the first connecting rod 42, and use the first locking nut 43 to lock the shaft assembly 92.

[0074] Rotate the lever 52 using the handle 53 to drive the clamping member 51 to clamp the assembly 9. At this time, the second bushing 912 is directly opposite the second mounting assembly 70, which serves as the bushing to be tested.

[0075] Insert the measuring end of the measuring instrument into the mounting hole 711 below the first second connecting rod 71, loosen the second locking nut 72, slide the second connecting rod 71 to find a suitable distance between the measuring instrument and the second bushing 912, put the collar of the measuring instrument on the outer circumference of the second bushing 912 without the annular protrusion, and tighten the second locking nut 72.

[0076] Apply radial force to the second bushing 912, read and record the gauge reading;

[0077] Remove the measuring instrument from the first second link 71, insert the measuring end of the measuring instrument into the mounting hole 711 below the second second link 71, loosen the second locking nut 72, slide the second link 71 to find the appropriate distance between the measuring instrument and the second bushing 912, put the collar of the measuring instrument on the outer circumference of the annular protrusion of the second bushing 912, and tighten the second locking nut 72.

[0078] Apply radial force to the second bushing 912, read and record the gauge reading;

[0079] Remove the locking piece 30, use the handle 53 to press down the rotating seat 20, making it rotate 90° relative to the support seat 10, and then reconnect the locking piece 30;

[0080] Insert the measuring end of the measuring instrument into the mounting hole 711 above the first second connecting rod 71, loosen the second locking nut 72, slide the second connecting rod 71 to find a suitable distance between the measuring instrument and the second bushing 912, put the collar of the measuring instrument on the outer circumference of the second bushing 912 without the annular protrusion, and tighten the second locking nut 72.

[0081] Remove the measuring instrument from the first second link 71, insert the measuring end of the measuring instrument into the mounting hole 711 above the second second link 71, loosen the second locking nut 72, slide the second link 71 to find the appropriate distance between the measuring instrument and the second bushing 912, put the collar of the measuring instrument on the outer circumference of the annular protrusion of the second bushing 912, and tighten the second locking nut 72.

[0082] A radial force is applied to the second bushing 912, the gauge reading is read and recorded, and the gap measurement between bushing assembly 91 and shaft assembly 92 is completed.

[0083] In the description of this application, it should be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0085] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0086] In this application, the term "some embodiments," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0087] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A device for measuring the clearance between a tail rotor hub bushing assembly and a shaft assembly, characterized in that, include: Support base; A rotating base is rotatably connected to the support base and has a mounting cavity; A locking element is detachably connected to the support base and the rotating base to lock the rotating base relative to the support base; as well as A first mounting component is disposed within the mounting cavity, and the first mounting component is configured to fix the assembly formed by the bushing assembly and the shaft assembly relative to the rotating seat.

2. The device for measuring the gap between the tail rotor hub bushing assembly and the shaft assembly according to claim 1, characterized in that, The support base has an arc-shaped groove, and the rotating base has an arc-shaped slide rail, which slides within the groove.

3. The device for measuring the clearance between the tail rotor hub bushing assembly and the shaft assembly according to claim 1, characterized in that, The support base has a first locking hole, and the rotating base has a second locking hole. The first locking hole or the second locking hole is provided in multiple ways. The locking member is formed in the shape of a rod. When the rotating base rotates to the point where one of the second locking holes is coaxial with one of the first locking holes, the locking member is inserted into the first locking hole and the second locking hole.

4. The device for measuring the clearance between the tail rotor hub bushing assembly and the shaft assembly according to claim 1, characterized in that, The first mounting assembly includes a support plate and a first connecting rod disposed on the support plate. The support plate is inclined, and the first connecting rod is perpendicular to the support plate. The first connecting rod is configured to pass through an inclined shaft hole on the shaft assembly.

5. The device for measuring the clearance between the tail rotor hub bushing assembly and the shaft assembly according to claim 4, characterized in that, The first connecting rod has an external thread, and the first mounting assembly also includes a first locking nut threaded to the external thread, with the first locking nut and the support plate forming an area for mounting the shaft assembly.

6. The device for measuring the gap between the tail rotor hub bushing assembly and the shaft assembly according to claim 1, characterized in that, The tail rotor hub bushing assembly and shaft assembly clearance measuring device further includes a fixing component that is movably disposed relative to the rotating seat, the fixing component being driven to fix the assembly within the mounting cavity.

7. The device for measuring the clearance between the tail rotor hub bushing assembly and the shaft assembly according to claim 6, characterized in that, The fixing assembly includes a clamping member and a rotating rod connected to the clamping member. The clamping member is located inside the mounting cavity. A portion of the rotating rod is located inside the mounting cavity, and another portion is located outside the mounting cavity. An external thread is formed on the rotating rod. A threaded hole is formed on the rotating seat for threaded connection of the rotating rod. The rotating rod can be driven to rotate relative to the rotating seat, thereby moving the clamping member within the mounting cavity to clamp the assembly within the mounting cavity.

8. The device for measuring the clearance between the tail rotor hub bushing assembly and the shaft assembly according to claim 1, characterized in that, The tail rotor hub bushing assembly and shaft assembly clearance measuring device further includes a base and a second mounting assembly slidably connected to the base. The support is fixed on the base, and the second mounting assembly is configured to mount a measuring instrument and be driven to slide relative to the support on the base.

9. The device for measuring the clearance between the tail rotor hub bushing assembly and the shaft assembly according to claim 8, characterized in that, The second mounting assembly includes a second connecting rod and a second locking nut disposed on the second connecting rod. The second connecting rod is slidably fitted to the base and has an external thread formed thereon. The second locking nut is threaded to the external thread to fix the second connecting rod relative to the base. The second connecting rod has a mounting hole for the measuring end of the measuring instrument to pass through.

10. The device for measuring the clearance between the tail rotor hub bushing assembly and the shaft assembly according to claim 8, characterized in that, The second installation component is configured in multiple ways, with at least two of the second installation components configured in parallel.

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