Rotation angle measurer for aviation airplane wheel experiment

Abstract

The invention discloses a rotation angle measurer for an aviation airplane wheel experiment. The rotation angle measurer comprises an airplane wheel connecting seat and a measuring seat, the airplane wheel connecting seat is sleeved on the measuring seat, and the airplane wheel connecting seat and the measuring seat are in running fit. The outer edge of the end face of one end of the measuring seat is provided with rotating scales, and the other end face is provided with an annular conical shaft clamping groove; and the conical shaft clamping groove is formed on the inner surface of the small inner diameter section of the airplane wheel connecting seat and the end surface and the outer circumferential surface of the third step of the measuring seat after the airplane wheel connecting seat and the measuring seat are assembled. A measuring seat is fixed on a conical shaft in the middle of an experiment table, an airplane wheel connecting seat is fixed on an aviation airplane wheel, and the airplane wheel connecting seat and the measuring seat are positioned, attached and contacted through a circumferential step surface. The machine wheel assembly rotates in the circumferential direction with the conical shaft as the rotation center, and measurement is conducted through the dial. The requirement for multiple angle marking can be met through one-time installation, the accuracy of the rotation angle is guaranteed, errors are reduced, and the device is suitable for experiments of tires of various models and good in reusability.

Description

Technical Field

[0001] The invention relates to the technical field of aviation machinery, in particular to a rotation angle measuring device used for aviation wheel experiments. Background Art

[0002] Aircraft wheels are generally composed of wheel assemblies and tires. In the design process of aircraft wheels, professional experiments such as tire lip pressure testing and stress strain testing require data collection in the circumferential direction of the wheel. This type of test needs to be carried out on a professional test bench. During the test, the aircraft wheel is installed through the tapered shaft in the middle of the test bench. The circumferential test of the aircraft wheel requires the wheel to be rotated in the circumferential direction, and data is collected when it rotates to different angles. In order to meet the requirements of data collection, it is necessary to clarify the angle of rotation between each data collection. Because the test bench itself has a large weight, and the weight of the wheel ranges from tens of kilograms to hundreds of kilograms, the rotation of the wheel is currently basically completed by manual dialing, and the rotation angle is also roughly marked on the tire after the worker measures it with a protractor. Each rotation is manually aligned with the artificial mark to measure the angle change. Therefore, the preparation work for the wheel test is cumbersome, and each wheel must be manually marked for each measurement, which is prone to human errors and large angle deviations. Similar patents for measuring the rotation angle of large equipment, such as CN215711299U, a tower crane boom rotation angle measurement system, connect the angle measuring instrument to the safety detector wirelessly. The angle measuring instrument is located inside the boom rotation axis to collect and display the data of angle changes. However, similar patents are not applicable to aircraft wheel test benches, and wireless data transmission is not suitable for test environments. After investigation, there are currently no compatible tooling or tools that can be purchased directly on the market. Summary of the invention

[0003] In order to avoid the errors and deviations caused by the existing manual angle measurement and manual angle marking and reduce the manual workload of the wheel test preparation, the present invention proposes a rotation angle measuring device for aircraft wheel experiments.

[0004] The present invention comprises a wheel connection seat and a measuring seat. The wheel connection seat is mounted on the measuring seat and the two are rotatably matched. The outer edge of the end surface of one end of the measuring seat is provided with a rotation scale, and the other end surface is provided with an annular tapered shaft clamping groove; the tapered shaft clamping groove is formed by the inner surface of the small inner diameter section of the wheel connection seat and the end surface and outer circumferential surface of the third step of the measuring seat after the wheel connection seat and the measuring seat are assembled.

[0005] A flange is arranged at one end surface of the wheel connecting seat; strip-shaped connecting holes for connecting the wheel are evenly distributed on the flange.

[0006] The inner diameter of the large inner diameter section of the wheel connecting seat is slightly larger than the maximum outer diameter of the measuring seat, and the inner diameter of the small inner diameter section is slightly larger than the outer diameter of the positioning section of the measuring seat.

[0007] An angle indicating point is arranged on the end face of the wheel connection seat.

[0008] The outer circumferential surface of the measuring seat is a three-step surface, the first step is a large outer diameter section that rotates with the large inner diameter section of the wheel connecting seat, the second step is a positioning section that cooperates with the small inner diameter section of the wheel connecting seat, and the third step is a slot section that forms a tapered shaft slot.

[0009] In the rotating scale, the angle between adjacent scales is 5°.

[0010] The measuring seat of the invention is fixed on the tapered shaft in the middle of the test bench, the wheel connecting seat is fixed on the aircraft wheel, and the wheel connecting seat and the measuring seat are positioned and fitted in contact through a circumferential stepped surface.

[0011] When the aircraft wheel is tested, the wheel assembly must be installed on the tapered shaft of the test bench. After installation, the tapered shaft is fixed, and the wheel assembly rotates in the circumferential direction with the tapered shaft as the rotation center. Wheels of different sizes are installed in combination with different diameters of the tapered shaft. In general, data measurement and collection are required at different rotation angles. Commonly used rotation interval angles are generally 10 degrees, 20 degrees, 30 degrees, etc. If the rotation interval angle is too large or too small, data collection is not very meaningful. In the present invention, the dial of the rotation angle measuring device is divided into 5-degree grids to meet the measurement requirements. The hollow diameter of the dial is the maximum diameter of the tapered shaft of the test bench. When measuring tires of different specifications, it can be fixedly installed in conjunction with the bushing. The wheel connecting seat and the measuring seat are fitted with a stepped circumferential surface, and are fixedly connected to the aircraft wheel through a connecting hole, and rotate synchronously with the aircraft wheel.

[0012] Before measuring, align the angle indicator point of the rotation angle measuring device with the rotation scale. During measurement, the dial is fixed on the tapered shaft and does not move. The rotating wheel drives the angle indicator point to rotate synchronously. According to the angle requirement, it can be rotated to the corresponding scale. One installation can meet the needs of multiple angle markings, and manual marking is no longer required. The dial ensures the accuracy of the rotation angle and reduces the error. At the same time, a set of rotation angle measuring devices is suitable for various types of tire tests and has good reusability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 yes Figure 1 Right view of .

[0015] Figure 3 It is an axonometric schematic diagram of the cooperation between the present invention and a tapered shaft.

[0016] Figure 4 yes Figure 3 sectional view of .

[0017] Figure 5 It is a schematic diagram of the cooperation between the present invention and the tapered shaft.

[0018] Figure 6 yes Figure 5 Front view of .

[0019] Figure 7 It is a structural diagram of the measuring seat.

[0020] Figure 8 It is a structural schematic diagram of the wheel connecting seat.

[0021] In the figure: 1. Angle indication point; 2. Wheel connecting seat; 3. Rotation scale; 4. Measuring seat; 5. Connecting hole; 6. Tapered shaft slot; 7. Tapered shaft. DETAILED DESCRIPTION

[0022] This embodiment is a rotation angle measuring device for aircraft wheel experiments, comprising a scale plate 3 and a pointer end 5. The rotation angle measuring device is used for measuring the circumferential rotation angle of an aircraft wheel 3 mounted on a tapered shaft 2 on an aircraft wheel test bench 1 during experiments.

[0023] This embodiment includes a wheel connection seat 2 and a measuring seat 4. The wheel connection seat is mounted on the measuring seat, and the two are rotated to fit each other, thereby obtaining the rotation angle measuring device of this embodiment. The end face of the measuring end of the measuring seat after assembly is flush with the end face of the wheel connection seat. The rotation angle measuring device has a rotation scale 3 on one end face and a ring-shaped tapered shaft groove 6 on the other end face; the tapered shaft groove is obtained by assembling the wheel connection seat 2 and the measuring seat 4, that is, the inner surface of the small inner diameter section of the wheel connection seat and the end face and outer circumferential surface of the third step of the measuring seat are formed.

[0024] The wheel connection seat 2 is a hollow rotating body, and a flange is provided at one end of the wheel connection seat; the flange is evenly distributed with strip-shaped connection holes for connecting the wheel. The inner circumferential surface of the wheel connection seat is a stepped surface, and the inner diameter of the large inner diameter section is slightly larger than the maximum outer diameter of the measuring seat 4, and the inner diameter of the small inner diameter section is slightly larger than the outer diameter of the positioning section of the measuring seat 4. An angle indication point 1 is provided on the end face of the wheel connection seat.

[0025] The measuring seat 4 is also a hollow rotating body, and its outer circumferential surface is a three-level stepped surface. The first step is a large outer diameter section that rotates with the large inner diameter section of the wheel connecting seat 2, the second step is a positioning section that cooperates with the small inner diameter section of the wheel connecting seat, and the third step is a slot section that forms a tapered shaft slot 6.

[0026] There is a rotation scale 3 at the outer edge of the end surface of the maximum outer diameter; the angle between adjacent scales is 5°.

[0027] When in use, the wheel connection seat 2 is fixed to the wheel hub through the strip connection hole 5; the measuring seat 4 is mounted and fixed on the tapered shaft 7 of the test bench.

[0028] When measuring the rotation angle, the pointer of the angle indicating point 1 needs to be aligned with any rotation scale before measurement, and the rotation scale is marked as 0° and used as the measurement starting point.

[0029] Rotate the aircraft wheel to drive the wheel connection seat 2 to rotate. At this time, the measuring seat remains stationary with the tapered shaft. When the wheel connection seat 2 rotates to the required angle, the scale corresponding to the angle indicating point 1 is the rotation angle of the aircraft wheel.

[0030] By adopting this embodiment, a single initial 0-degree positioning can satisfy the measurement of different angles, thus facilitating the measurement of the rotation angles of aircraft wheels of different models.

Claims

1. A rotation angle measuring device for aircraft wheel experiments, characterized in that: The invention comprises a wheel connection seat (2) and a measuring seat (4); the wheel connection seat is mounted on the measuring seat and the two are rotatably matched; a rotation scale (3) is provided at the outer edge of the end surface of one end of the measuring seat, and an annular tapered shaft clamping groove (6) is provided on the other end surface; the tapered shaft clamping groove is formed on the inner surface of the small inner diameter section of the wheel connection seat and the end surface and outer circumferential surface of the third step of the measuring seat after the wheel connection seat (2) and the measuring seat (4) are assembled.

2. The rotation angle measuring device for aircraft wheel testing as claimed in claim 1, characterized in that: A flange is provided at one end surface of the wheel connecting seat (2); and strip-shaped connecting holes for connecting the wheel are evenly distributed on the flange.

3. The rotation angle measuring device for aircraft wheel testing as claimed in claim 1, characterized in that: The inner diameter of the large inner diameter section of the wheel connecting seat is slightly larger than the maximum outer diameter of the measuring seat (4), and the inner diameter of the small inner diameter section is slightly larger than the outer diameter of the positioning section of the measuring seat.

4. The rotation angle measuring device for aircraft wheel testing as claimed in claim 1, characterized in that: An angle indicating point (1) is provided on the end surface of the wheel connection seat.

5. The rotation angle measuring device for aircraft wheel testing as claimed in claim 1, characterized in that: The outer circumferential surface of the measuring seat (4) is a three-step surface, the first step being a large outer diameter section rotatably matched with the large inner diameter section of the wheel connecting seat (2), the second step being a positioning section matched with the small inner diameter section of the wheel connecting seat, and the third step being a slot section forming a tapered shaft slot (6).

6. The rotation angle measuring device for aircraft wheel testing as claimed in claim 1, characterized in that: In the rotating scale (3), the angle between adjacent scales is 5°.

7. The rotation angle measuring device for aircraft wheel testing according to claim 1, characterized in that: When in use, the wheel connection seat (2) is fixed to the wheel hub through the strip connection hole (5); the measuring seat (4) is mounted and fixed on the tapered shaft (7) of the test bench; when measuring the rotation angle, the pointer of the angle indicating point (1) needs to be aligned with any rotation scale before measurement, and the rotation scale is recorded as 0°, which is used as the measurement starting point; The aircraft wheel is rotated to drive the wheel connection seat (2) to rotate; at this time, the measuring seat remains stationary along with the tapered shaft; when the wheel connection seat is rotated to a required angle, the scale corresponding to the angle indicating point is the rotation angle of the aircraft wheel.

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