A tool for measuring the deflection angle of the rudder surface

Abstract

The present invention discloses a tool for measuring the deflection angle of a rudder surface, comprising a measuring tool body, a positioning assembly, and a pointer. The measuring tool body is provided with a scale; the positioning measuring tool comprises a C-shaped part, a first positioning part connected to one end of the C-shaped part, and a second positioning part connected to the other end of the C-shaped part, and the positioning assembly is arranged on the first positioning part and the second positioning part; the C-shaped part is provided with a rotating approach measuring rod, and the rotating approach measuring rod is arranged opposite to the pointer, and the rotating approach measuring rod and the pointer both point to the center of the C-shaped part. The rotating approach measuring rod is perpendicular to the axis of the rudder shaft, and the measurement reference point of the measuring tool body is determined. The pointer is mounted on the rudder surface, and the positioning assembly positions the first positioning part and the second positioning part on the measured substrate, and the position of the measuring tool body is fixed. The pointer rotates with the rudder, and the measurer can know the deflection angle of any position of the rudder surface. The tool described in the present invention has a simple structure and is easy to operate.

Description

Technical Field

[0001] The present invention relates to the design and calibration of rudders in general aviation aircraft. Background Art

[0002] The rudder refers to the movable wing part on the vertical tail for achieving aircraft heading control. It is connected to the rear of the vertical stabilizer with a hinge and can be deflected left and right to control the aircraft heading. Summary of the invention

[0003] The technical problem solved by the present invention is: how to simply measure the deflection angle of the rudder surface of an aircraft.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a tool for measuring the deflection angle of a rudder surface, comprising a measuring tool body, a positioning assembly for positioning the measuring tool body, and a pointer used in conjunction with the measuring tool body, wherein the measuring tool body is provided with a scale capable of judging the deflection angle of the pointer; the positioning measuring tool comprises a C-shaped portion, a first positioning portion connected to one end of the C-shaped portion, and a second positioning portion connected to the other end of the C-shaped portion, wherein the positioning assembly is arranged on the first positioning portion and the second positioning portion; a rotating approach measuring rod is provided on the C-shaped portion, wherein the rotating approach measuring rod is arranged opposite to the pointer, and both the rotating approach measuring rod and the pointer point to the center of the C-shaped portion.

[0005] The rudder has one side called the rudder surface. Measuring the deflection angle of the rudder specifically involves measuring the deflection angle of one side of the rudder.

[0006] The measuring tool body is rigid and half surrounds the rudder. The rotating approach measuring rod is moved to point to the axis of the rudder shaft, that is, the rotating approach measuring rod is perpendicular to the axis of the rudder shaft. In this way, the measurement reference point of the measuring tool body is determined. Afterwards, the pointer is installed on the rudder surface. The pointer points to the center of the C-shaped part and the axis of the rudder shaft. Afterwards, the positioning assembly positions the first positioning part and the second positioning part on the measured substrate to fix the position of the measuring tool body. At this time, the deflection angle of the rudder surface relative to the measured substrate can be known based on the position of the pointer, that is, the scale value pointed by the pointer. If the rudder is rotated relative to the measured substrate, the pointer will also rotate accordingly, and the measurer can know the deflection angle of any position of the rudder surface.

[0007] The tool of the present invention can be used for testing the rudder design process. The operator adjusts the deflection angle of the rudder surface to simulate the actual operation situation and judge the feasibility of the rudder design.

[0008] The tool of the present invention can also be used to measure the deflection angle of the rudder surface of an aircraft in an operational state, so as to correct the deflection angle of the rudder, so that the angle of the rudder deflection intended by the driver coincides with the actual deflection angle of the rudder.

[0009] The tool of the present invention has a simple structure and is easy to operate, and can conveniently measure the deflection angle of the rudder surface of an aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below in conjunction with the accompanying drawings:

[0011] Figure 1 A schematic diagram of a tool for measuring the deflection angle of a rudder surface;

[0012] Figure 2 The present invention is a schematic diagram of the working of a tool for measuring the deflection angle of a rudder surface when measuring the deflection angle of a rudder.

[0013] Explanation of symbols in the figure:

[0014] 10. Measuring tool body; 11. C-shaped portion; 12. First positioning portion; 13. Second positioning portion; 14. Strip groove;

[0015] 20. Pointer; 21. Suction cup;

[0016] 30. Rotating approach measuring rod;

[0017] 41. a first set of threaded rods; 42. a second set of threaded rods; 43. a stopper;

[0018] 50. Rudder; 51. Test substrate. DETAILED DESCRIPTION

[0019] Combination Figure 1 , Figure 2 A tool for measuring the deflection angle of a rudder surface comprises a measuring tool body 10, a positioning assembly for positioning the measuring tool body, and a pointer 20 used in conjunction with the measuring tool body, wherein the measuring tool body is provided with a scale capable of judging the deflection angle of the pointer; the positioning measuring tool comprises a C-shaped portion 11, a first positioning portion 12 connected to one end of the C-shaped portion, and a second positioning portion 13 connected to the other end of the C-shaped portion, wherein the positioning assembly is arranged on the first positioning portion and the second positioning portion; a rotating approach measuring rod 30 is arranged on the C-shaped portion, wherein the rotating approach measuring rod is arranged opposite to the pointer, and both the rotating approach measuring rod and the pointer point to the center of the C-shaped portion.

[0020] The rudder 50 is installed on the measured substrate 51 through a hinge shaft. Before the aircraft is put into operation, the measured substrate 51 is a simulation of a vertical stabilizer. After the aircraft is put into operation, the measured substrate is the actual vertical stabilizer.

[0021] During measurement, the rudder 50 is located at the center of the C-shaped part 11, and the first positioning part 12 and the second positioning part 13 are located on both sides of the measured substrate 51. Before the measuring tool body 10 is fixed on the measured substrate 51, the rotating approach measuring rod 30 is moved to point to the hinge axis of the rudder and to press against the rudder, so that the measurement reference point of the measuring tool body 10 is determined. Afterwards, one end of the pointer 20 is installed on the rudder surface, and the pointer points to the hinge axis of the rudder. The first positioning part 12 and the second positioning part 13 are fixed on both sides of the measured substrate 51 through the positioning assembly. Afterwards, the rotating approach measuring rod 30 is loosened to keep it away from the rudder and not in contact with the rudder. The rudder 50 rotates relative to the measured substrate 51 around the hinge axis, and the pointer 20 thereon rotates accordingly. The deflection angle of the rudder can be known through the scale on the measuring tool body 10. Among them, as a preferred embodiment, the rotating approach measuring rod 30 is screwed on the C-shaped part 11.

[0022] The surveyor makes the rotating approach measuring rod 30 point to the hinge axis of the rudder, which is a visual judgment. For example, the hinge axis and the rotating approach measuring rod are observed from the side, that is, the line of sight is parallel to the hinge axis. The pointer points to the hinge axis of the rudder, which is also a visual judgment. This judgment is not accurate and has errors, but it is practical and efficient.

[0023] The first positioning portion 12 and the second positioning portion 13 are both strip-shaped parts, which are integrally formed with the C-shaped portion 11. For example, they are formed by bending a steel bar. In this way, it is possible to avoid displacement of the C-shaped portion and the first positioning portion and the second positioning portion, which may cause a large measurement error. And the integrally formed measuring tool body 10 has a stable structure. The strip-shaped first positioning portion 12 and the second positioning portion 13 are respectively parallel to the two side surfaces of the measured substrate 51. When the first positioning portion and the second positioning portion are fixed on the measured substrate, the parallel relationship between the first positioning portion 12 and the second positioning portion 13 and the two side surfaces of the measured substrate 51 can help the measurer to accurately position the measuring tool body 10, so as to improve the accuracy of the measurement.

[0024] The positioning assembly includes a first group of threaded rods 41 and a second group of threaded rods 42, wherein the first group of threaded rods is screwed on the first positioning portion 12, and the second group of threaded rods is screwed on the second positioning portion 13. In the process of moving the rotating approach measuring rod 30 to point to the hinge shaft of the rudder and to press against the rudder, the measurer can simultaneously move the first group of threaded rods 41 and the second group of threaded rods 42 to gradually approach and press against the two side surfaces of the measured substrate 51. After the relative positions of the rotating approach measuring rod 30 and the rudder 50 are determined, the first group of threaded rods 41 and the second group of threaded rods 42 are pressed against the two side surfaces of the measured substrate 51, and the measuring tool body 10 is fixed on the measured substrate. Among them, the first positioning portion 12 and the second positioning portion 13 are parallel to the two side surfaces of the measured substrate 51, respectively.

[0025] In order to ensure that the first positioning part 12 and the second positioning part 13 are respectively parallel to the two side surfaces of the measured substrate 51, a limiter 43 is provided on any threaded rod in the positioning assembly, and the distance from the limiter to one end of the threaded rod on which it is located is a certain value. The distance from the limiters on all threaded rods in the first group of threaded rods 41 to one end of the threaded rod on which they are located is the fixed value, and one end of the threaded rod is pressed against the side surface of the measured substrate 51, so that the parallelism of the first positioning part 12 and one side surface of the measured substrate can be ensured. Similarly, the limiter on the second group of threaded rods 42 can ensure the parallelism of the second positioning part 13 and the other side surface of the measured substrate. As an option, the limiter 43 is a nut screwed on the threaded rod, and the position of the nut on the threaded rod can be adjusted to control the force between the threaded rod and the measured substrate, which is suitable for measured substrates of different sizes.

[0026] The C-shaped portion 11 is provided with a strip groove 14, in which a pointer 20 is slidably fitted. The pointer 20 is slidably fitted with the strip groove, and the radial movement of the pointer along the C-shaped portion is not restricted.

[0027] A suction cup 21 is provided at one end of the pointer 20, and the suction cup can be adsorbed on the rudder surface, so that the pointer and the rudder surface are fixed simply and easily.

[0028] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A tool for measuring the deflection angle of a rudder surface, comprising a measuring tool body (10), a positioning assembly for positioning the measuring tool body, and a pointer (20) used in conjunction with the measuring tool body, wherein the measuring tool body is provided with a scale capable of judging the deflection angle of the pointer; characterized in that: The positioning measuring tool comprises a C-shaped part (11), a first positioning portion (12) connected to one end of the C-shaped part, and a second positioning portion (13) connected to the other end of the C-shaped part, wherein the positioning assembly is arranged on the first positioning portion and the second positioning portion; a rotating approach measuring rod (30) is arranged on the C-shaped part, wherein the rotating approach measuring rod is arranged opposite to the pointer, and the rotating approach measuring rod and the pointer both point to the center of the C-shaped part.

2. The tool for measuring the deflection angle of a rudder surface according to claim 1, characterized in that: The first positioning portion (12) and the second positioning portion (13) are both strip-shaped pieces and are integrally formed with the C-shaped portion (11).

3. The tool for measuring the deflection angle of a rudder surface according to claim 2, characterized in that: The positioning assembly comprises a first group of threaded rods (41) and a second group of threaded rods (42), wherein the first group of threaded rods are screwed on the first positioning portion (12), and the second group of threaded rods are screwed on the second positioning portion (13).

4. The tool for measuring the deflection angle of a rudder surface according to claim 3, characterized in that: Any threaded rod in the positioning assembly is provided with a limiting member (43).

5. The tool for measuring the deflection angle of a rudder surface according to claim 1, characterized in that: The rotary approach measuring rod (30) is screwed onto the C-shaped portion (11).

6. The tool for measuring the deflection angle of a rudder surface according to claim 1, characterized in that: A strip groove (14) is provided on the C-shaped portion (11), and a pointer (20) is slidably fitted in the strip groove.

7. The tool for measuring the deflection angle of a rudder surface according to claim 1, characterized in that: One end of the pointer (20) is provided with a suction cup (21), which can be adsorbed on the rudder surface.

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