Aviation tail transmission shaft movable shaft tooth backlash testing device

Abstract

An aviation tail transmission shaft movable shaft tooth backlash testing device comprises a tail transmission shaft installation testing table, a sliding guide rail is arranged on the tail transmission shaft installation testing table, two sets of sliding supports A and sliding supports B are movably installed on the sliding guide rail, and a tail transmission shaft is installed between the sliding supports A and B; the utility model relates to the technical field of gear backlash detection, solves the problem that a filler gauge is inconvenient to operate when a filler gauge method is used for measuring the gear backlash, can measure and read the gear backlash of a tail transmission shaft without the filler gauge, and also solves the problem of reading errors when a lead pressing method is used for measuring the gear backlash. Measurement of the gear backlash of the aviation tail transmission shaft with different lengths and different shaft end gears is met, meanwhile, the force loss during rotation can be reduced through matched transmission of the loading disc and the loading gear, and the applied force condition in the tail transmission shaft rotation detection process can be more visually detected by connecting the pressure pound meter. Finally, the measuring result is more accurate and visual through the reading of the dial indicator, and the detection efficiency and the detection precision are improved.

Description

Technical Field

[0001] This invention relates to the field of tooth backlash detection technology, and in particular to a device for testing the tooth backlash of a movable shaft in an aircraft tail drive shaft. Background Technology

[0002] The presence of tooth backlash serves to store lubricating oil and create an oil film, as well as to compensate for gear deformation caused by thermal expansion. However, during high-speed rotation, excessive backlash in the gear pair can cause the unloaded gear pairs to knock back and forth, resulting in vibration and noise. Therefore, it is necessary to test the tooth backlash. The tooth backlash of the tail drive shaft is mostly tested using the feeler gauge method and the lead weight method. The disadvantage of the feeler gauge method is that it is limited by the gear installation position. For gears in special locations, the feeler gauge cannot be operated, making it impossible to measure their tooth backlash. The disadvantage of the lead weight method is that after the lead weight is squeezed by the meshing gears, a measuring tool must be used to measure its thinnest point. Errors in the selection of the measurement position and the reading during the measurement process can cause inaccurate tooth backlash measurement, affecting the efficiency and accuracy of tail drive shaft tooth backlash testing.

[0003] Therefore, it is essential to provide a device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft to address the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a device for testing the tooth flank clearance of the movable shaft of an aircraft tail drive shaft. This device solves the problem of inconvenient operation of feeler gauges in the feeler gauge method for measuring tooth flank clearance, allowing for measurement and reading of the tooth flank clearance of the tail drive shaft without the need for feeler gauges. It also solves the problem of reading errors in the lead weight method for measuring tooth flank clearance. This application adopts a sliding support design to meet the measurement requirements of the tooth flank clearance of aircraft tail drive shafts with different lengths and different shaft end gears. Simultaneously, the use of a loading disc in conjunction with a loading gear reduces force loss during rotation, ensuring detection accuracy. Connecting a pressure gauge provides a more intuitive way to detect the applied force during the rotation of the tail drive shaft, ensuring balanced force. Finally, the use of a dial gauge reading makes the measurement results more accurate and intuitive, improving detection efficiency and accuracy.

[0005] The above-mentioned objectives of the present invention are achieved by the following technical means.

[0006] A device for testing the backlash of movable shaft teeth of an aircraft tail drive shaft is provided, including a tail drive shaft mounting test platform. A sliding guide rail is provided on the tail drive shaft mounting test platform. Two sets of sliding supports A and B are movably mounted on the sliding guide rail. A tail drive shaft is installed between the sliding supports A and the sliding supports B.

[0007] A loading disc is installed horizontally through the sliding support A. A hexagonal connector is provided at one end of the loading disc, and a torque gauge is connected to the hexagonal connector. A fixed disc is installed on the sliding support B.

[0008] The tail drive shaft includes a shaft body, with movable end A and movable end B respectively at both ends. A loading gear is inserted into movable end A, and a spline sleeve is installed on movable end B. The spline sleeve is fixedly connected to the fixed disc bolt. A fixed tooth side clearance clamping ring is sleeved on the spline sleeve. Both movable end A and movable end B are provided with pins.

[0009] Specifically, the loading gear is installed inside the loading disk, and the loading gear and the loading disk are connected by a flat key.

[0010] Specifically, a dial indicator clamp is installed on the fixed tooth side clearance clamp, and a dial indicator is installed on the dial indicator clamp, with the dial indicator abutting against the pin.

[0011] Specifically, both sliding support A and sliding support B are equipped with set screws, which pass through sliding support A and sliding support B and are fixed to the sliding guide rail.

[0012] Specifically, the dial indicator clamping block has two sets of clamping blocks integrally formed, with a slot between the two sets of clamping blocks, and screws connecting the two sets of clamping blocks by threads.

[0013] This invention solves the problem of inconvenient operation of feeler gauges in measuring tooth flank clearance, allowing for measurement and reading of the tooth flank clearance of the tail drive shaft without the need for feeler gauges. It also solves the problem of reading error in the lead weight method for measuring tooth flank clearance. This application adopts a sliding support design to meet the measurement requirements of the tooth flank clearance of aircraft tail drive shafts with different lengths and different shaft end gears. At the same time, the use of a loading disc and loading gear in conjunction with the transmission can reduce the loss of force during rotation and ensure the accuracy of the test. Connecting a pressure gauge provides a more intuitive way to detect the applied force during the rotation of the tail drive shaft, ensuring balanced force. Finally, the use of a dial gauge reading makes the measurement results more accurate and intuitive, improving the efficiency and accuracy of the test. Attached Figure Description

[0014] The invention will be further described with reference to the accompanying drawings, but the contents of the drawings do not constitute any limitation on the invention.

[0015] Figure 1 This is a front view of a device for testing the backlash of movable shaft teeth of an aircraft tail drive shaft according to the present invention.

[0016] Figure 2 This is a perspective view of a device for testing the backlash of movable shaft teeth of an aircraft tail drive shaft according to the present invention.

[0017] Figure 3 This invention relates to a device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft. Figure 2 A magnified view of the area at point X in the middle.

[0018] Figure 4 This invention relates to a device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft. Figure 2 A magnified view of the area at point Y in the middle.

[0019] Figure 5 This is a cross-sectional schematic diagram of the spline sleeve of the aircraft tail drive shaft moving shaft tooth side clearance testing device of the present invention.

[0020] Figure 6 This is a partially enlarged view of the dial indicator clamp block of the aircraft tail drive shaft movable shaft tooth side clearance testing device of the present invention.

[0021] from Figures 1 to 6 Including:

[0022] 1. Tail drive shaft mounting test bench;

[0023] 2. Sliding guide rail;

[0024] 3. Sliding support A;

[0025] 4. Sliding support B;

[0026] 5. Tail drive shaft;

[0027] 6. Load the disk;

[0028] 7. Hexagonal connector;

[0029] 8. Torque gauge;

[0030] 9. Fix the disc;

[0031] 10. Shaft;

[0032] 11. Activity end A;

[0033] 12. Activity end B;

[0034] 13. Load the gears;

[0035] 14. Splined sleeve;

[0036] 15. Fixed tooth flank clearance clamping ring;

[0037] 16. Pin;

[0038] 17. Dial indicator clamping block;

[0039] 18. Dial gauge;

[0040] 19. Set screw;

[0041] 20. Clamping block;

[0042] 21. Grooving;

[0043] 22. Screws. Detailed Implementation

[0044] The present invention will be further described in conjunction with the following embodiments.

[0045] Example 1.

[0046] like Figure 1-6 As shown, a device for testing the backlash of movable shaft teeth of an aircraft tail drive shaft includes a tail drive shaft mounting test bench 1. A sliding guide rail 2 is provided on the tail drive shaft mounting test bench 1. Two sets of sliding supports A3 and B4 are movably mounted on the sliding guide rail 2. A tail drive shaft 5 is installed between the sliding supports A3 and B4.

[0047] A loading disc 6 is installed horizontally through the sliding support A3. A hexagonal connector 7 is provided at one end of the loading disc 6. A torque gauge 8 is connected to the hexagonal connector 7. A fixed disc 9 is installed on the sliding support B4.

[0048] The tail drive shaft 5 includes a shaft body 10. The shaft body 10 has a movable end A11 and a movable end B12 at its two ends. A loading gear 13 is inserted into the movable end A11. A spline sleeve 14 is installed on the movable end B12. The spline sleeve 14 is bolted to the fixed disc 9. A fixed tooth side clearance clamping ring 15 is sleeved on the spline sleeve 14. Pins 16 are provided next to both the movable end A11 and the movable end B12.

[0049] The loading gear 13 is installed inside the loading disk 6, and the loading gear 13 is connected to the loading disk 6 by a flat key.

[0050] A dial indicator clamp 17 is mounted on the fixed tooth side clearance clamp 15, and a dial indicator 18 is mounted on the dial indicator clamp 17. The dial indicator 18 abuts against the pin 16.

[0051] Both sliding support A3 and sliding support B4 are equipped with set screws 19, which pass through sliding support A3 and sliding support B4 and are fixed to sliding guide rail 2.

[0052] Two sets of clamping blocks 20 are integrally formed on the dial indicator clamping block 17. A slot 21 is provided between the two sets of clamping blocks 20, and a screw 22 is threadedly connected between the two sets of clamping blocks 20.

[0053] In use, the shaft body 10 of the tail drive shaft 5 is installed between two sets of sliding supports A3 and B4. At the same time, the sliding supports A3 and B4 can be adjusted in position on the tail drive shaft mounting test bench 1 by means of the set screws 19 installed at the bottom and the sliding guide rail 2. The sliding supports A3 and B4 can be fixed by tightening the set screws 19 on the sliding supports A3 and B4, so that the tail drive shaft mounting test bench 1 can be used to test various models and lengths of tail drive shafts 5.

[0054] The splined sleeve 14 installed on the movable end B12 of the tail drive shaft 5 has four sets of mounting holes on its end face. The mounting holes are fixed to the fixed disc 9 by bolts. The movable end B12 on the tail drive shaft 5 is fixed to one end of the sliding support B4. The loading gear 13 is first installed on the movable end A11 of the tail drive shaft 5. At the same time, multiple sets of loading gear 13 models can be selected to be adapted to the movable end A11 on the tail drive shaft 5 for installation. The movable end A11 with the loading gear 13 is installed in the loading disc 6 set on the sliding support A3. The loading gear 13 and the loading disc 6 are connected by a flat key. In this way, the entire tail drive shaft 5 to be tested is installed between the sliding support A3 and the sliding support B4.

[0055] The tooth flank clearance clamp 15 is fixed on the spline sleeve 14, and the dial indicator 18 is installed on the dial indicator clamp 17 set on the tooth flank clearance clamp 15. The screw 22 on the dial indicator clamp 17 and the slot 21 between the two sets of clamps 20 are adjusted to clamp the dial indicator 18. At the same time, the angle of the dial indicator clamp 17 is adjusted so that the two ends of the dial indicator 18 are pressed against the pins 16 originally on the tail drive shaft 5.

[0056] Externally, a torque wrench is used to turn the hexagonal connector 7 to one side. Since the torque gauge 8 is connected to the loading disk 6 via the hexagonal connector 7 on the sliding support B4, the torque gauge 8 will generate a reading as the loading disk 6 rotates during the turning of the hexagonal connector 7. The reading is observed and recorded as a torque reference. The rotation of the hexagonal connector 7 is due to the force transmission between the loading disk 6 and the loading gear 13. The engagement of the loading disk 6 and the loading gear 13 can reduce torque loss during force transmission, causing the tail drive shaft 5 to rotate between the sliding support A3 and the sliding support B4. At this time, the gear at the movable end B12 of the tail drive shaft 5 is in contact with the tooth side of the spline sleeve 14. Then, the dial indicator clamp 17 is moved to clamp the dial indicator mounting plate. The dial indicator 18 is perpendicularly abutted against the plane of the pin 16 originally located on the movable end A11 and movable end B12. At the same time, the reading of the dial indicator 18 is zeroed. Then, the hexagonal connector 7 is loaded in the opposite direction to make the entire tail drive shaft 5 rotate in the opposite direction until the reading of the torque gauge 8 is the same as the previously observed force reading, ensuring that the torque on the tail drive shaft 5 is the same during testing. Since the pin 16 is fixedly connected to the movable end A11 and movable end B12 of the tail drive shaft 5, the pin 16 installed on it will also rotate during the reverse rotation of the tail drive shaft 5. The reverse rotation of the pin 16 can compress the dial indicator 18 abutting on the pin 16, causing the dial indicator 18 to change its reading. At this time, the current reading of the dial indicator 18 is the tooth backlash value of the tail drive shaft 5.

[0057] In the production process, the problem of inconvenient operation of feeler gauges in measuring tooth flank clearance was solved. The tooth flank clearance of the tail drive shaft can be measured and read without feeler gauges. At the same time, the problem of reading error in the tooth flank clearance measurement by the lead weight method was also solved. This application adopts a sliding support design to meet the measurement of the tooth flank clearance of the tail drive shaft 5 of aircraft with different lengths and different shaft end gears. At the same time, the use of loading disc 6 and loading gear 13 to cooperate in transmission can reduce the loss of force during rotation and ensure the detection accuracy. Connecting pressure gauge 8 makes it more intuitive to detect the applied force during the rotation detection of tail drive shaft 5 and ensure the force balance. Finally, the reading of dial gauge 18 makes the measurement results more accurate and intuitive, improving detection efficiency and detection accuracy.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft, characterized in that: The device includes a tail drive shaft mounting test stand, on which a sliding guide rail is provided. Two sets of sliding supports A and B are movably mounted on the sliding guide rail, and a tail drive shaft is installed between the sliding supports A and B. A loading disc is horizontally installed through the sliding support A. A hexagonal connector is provided at one end of the loading disc, and a torque gauge is connected to the hexagonal connector. A fixing disc is installed on the sliding support B. The tail drive shaft includes a shaft body, with movable end A and movable end B respectively provided at both ends of the shaft body. A loading gear is inserted into movable end A, and a spline sleeve is installed on movable end B. The spline sleeve is fixedly connected to the fixed disc bolt. A fixed tooth side clearance clamping ring is sleeved on the spline sleeve. Both movable end A and movable end B are provided with pins.

2. The device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft according to claim 1, characterized in that: The loading gear is installed inside the loading disk, and the loading gear is connected to the loading disk by a flat key.

3. The device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft according to claim 2, characterized in that: A dial indicator clamp is installed on the fixed tooth side clearance clamp, and a dial indicator is installed on the dial indicator clamp, with the dial indicator abutting against the pin.

4. The device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft according to claim 3, characterized in that: Both sliding support A and sliding support B are equipped with set screws, which pass through sliding support A and sliding support B and are fixed to the sliding guide rail.

5. The device for testing the backlash of the movable shaft teeth of an aircraft tail drive shaft according to claim 4, characterized in that: The dial indicator clamping block has two sets of clamping blocks integrally formed on it, and a slot is provided between the two sets of clamping blocks. The two sets of clamping blocks are threadedly connected by screws.

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