A front wheel turning hand wheel deflection angle measuring device

Abstract

The present invention discloses a front wheel turning hand wheel deflection angle measuring device, comprising a scale plate, a front splint, a rear splint and a T-shaped connector, wherein: the scale plate is a disk-shaped structure with a fan-shaped notch, a semicircular notch is left at the center of the scale plate, and scales are arranged on the circumference of the scale plate; the front splint and the rear splint are splicable structures, the middle parts of the two are both arc-shaped structures, and after splicing, a clamping hole for clamping a front wheel turning hand wheel transmission rod is formed; one end of the front splint and the rear splint are connected by a pin shaft, and the other ends of the front splint and the rear splint are openable or locking structures; a T-shaped connector is fixed on the side of the front splint, the T-shaped connector has an upper pointer and a lower pointer, the lower pointer is connected and fixed to the 0° position of the scale on the scale plate; the upper pointer and the lower pointer point in opposite directions, the upper pointer is used to align with the triangular neutral mark on the front wheel turning hand wheel, and the lower pointer is used to align with the neutral mark line on the light guide plate in the cockpit.

Description

Technical Field

[0001] The invention belongs to the field of aviation technology, and in particular relates to a front wheel turning hand wheel deflection angle measuring device. Background Art

[0002] During takeoff and landing, the pilot manually controls the nose wheels, using the steering wheel in the cockpit. When taxiing, the nose wheels are typically controlled by an automatic control system to ensure vertical directional stability while the aircraft is operating on the ground. However, when turning on the ground, the nose wheels can sometimes deviate unexpectedly, making directional control more difficult.

[0003] After inspection and analysis, it was found that the triangular neutral mark on the front wheel steering hand wheel did not coincide with the neutral mark line on the light guide panel in the cockpit, causing the pilot to operate the front wheel to steer according to the instructions on the instrument panel, resulting in the aircraft deviating when the pilot manually controlled the front wheel to steer.

[0004] When installing the front wheel steering handwheel, the operator relies on aligning the neutral mark on the aircraft's light guide plate with the triangular neutral mark on the front wheel steering handwheel before installing it. However, there is a distance of about 60mm between the front wheel steering handwheel and the light guide plate. Without auxiliary installation tooling, the accuracy of the front wheel steering handwheel installation position cannot be guaranteed, which can easily lead to misunderstandings in steering and direction correction. Too frequent steering will prolong the driver's fatigue driving time, accelerate the aging of the steering system, tires, etc., and bring great hidden dangers to driving safety. Summary of the Invention

[0005] The present invention addresses the problem of aircraft deviation during steering caused by installation deviation of the front wheel steering handwheel, and provides a front wheel steering handwheel deflection angle measuring device, which effectively improves the installation quality of the front wheel steering handwheel, slows down the aging speed of the steering system, tires, etc., and improves the balance of the aircraft during steering.

[0006] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0007] A front wheel turning hand wheel deflection angle measuring device comprises a dial, a front clamping plate, a rear clamping plate and a T-shaped connector, wherein:

[0008] The dial is a disc-shaped structure with a fan-shaped notch. A semicircular notch is left at the center of the dial, and scales are set on the circumference of the dial.

[0009] The front and rear plates are splittable structures, and the middle parts of both are arc-shaped structures. When spliced ​​together, a clamping hole is formed for clamping the transmission rod of the front wheel turning handwheel; one end of the front and rear plates are connected by a pin shaft, and the other end of the front and rear plates are openable or lockable structures;

[0010] A T-shaped connector is fixed on the side of the front splint. The T-shaped connector has an upper pointer and a lower pointer. The lower pointer is connected and fixed to the 0° position of the scale on the dial. The upper and lower pointers point in opposite directions but are on the same straight line. When in use, the upper pointer is used to align with the triangular neutral mark on the front wheel turning handwheel, and the lower pointer is used to align with the neutral mark line on the light guide plate in the cockpit.

[0011] Furthermore, the fan-shaped notch is used for the transmission rod of the aircraft's front wheel steering handwheel to pass through; and the semicircular notch is used to cooperate with the outer wall of the transmission rod of the front wheel steering handwheel.

[0012] Furthermore, let the central angle corresponding to the outer circumference of the scale be N, then set N / 2 as 0°, and the clockwise direction from 0° is the positive scale, and the counterclockwise direction is the negative scale.

[0013] Furthermore, a window is provided on the scale plate to facilitate the correspondence between the scale plate and the 0-position scale on the aircraft light guide plate; wherein the window is located on the side of 0°.

[0014] Furthermore, for the scale setting, each grid represents 1 degree, and each large grid represents 5 degrees.

[0015] Furthermore, a slot is provided at the end of the front splint, and a rotatable slipknot bolt is installed at the end of the rear splint through a pin. After the slipknot bolt is rotated until it is engaged in the slot, the front and rear splints are locked by tightening the nut on the slipknot bolt.

[0016] Furthermore, the straight line passes through the center of the clamping hole formed by splicing the front and rear splints.

[0017] Furthermore, the outer shape of the upper pointer is a triangle mark shape, and the outer shape of the lower pointer is a wedge shape.

[0018] Furthermore, the dial is installed on the side of the transmission rod of the aircraft's nose wheel steering hand wheel so that the transmission rod fits with the semicircular notch of the dial, and at the same time, the scale line at the 0° position on the side of the window on the dial is aligned with the 0 position scale line on the light guide plate. Then, the transmission rod is clamped between the front and rear splints, and the dial is rotated to adjust the position of the dial so that the triangular mark on the nose wheel steering hand wheel is aligned with the tip of the upper pointer. Then, the front and rear splints are locked so that the dial is fixed relative to the aircraft's nose wheel steering hand wheel. Thereafter, the dial is driven to fine-tune its position by rotating the nose wheel steering hand wheel, and the lower pointer is observed through the window to align with the neutral mark line on the light guide plate in the cockpit. At this time, the position of the nose wheel steering hand wheel is the correct installation position.

[0019] Compared with the prior art, the present invention has the following technical features:

[0020] The present invention provides a nose wheel steering handwheel deflection angle measuring device that is lightweight, simple in structure, and easy to use. It can be used regardless of open space. The front and rear plates perfectly match the aircraft's structural components, and the provision of upper and lower pointers facilitates intuitive installation and inspection of the nose wheel steering handwheel's installation quality. This device avoids errors in steering and directional correction, slows down the aging of the steering system, tires, etc., improves the aircraft's balance during turns, and enhances aircraft operating safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-view and isometric view of the front wheel steering handwheel deflection angle measuring device;

[0022] Figure 2 Isometric view of the front wheel steering handwheel deflection angle measurer.

[0023] Among them: 1 dial, 2 front splint, 3 pin shaft, 4 rear splint, 5 swing bolt, 6 nut, 7 pin, 8 upper pointer, 9 lower pointer, 10 T-shaped connector. DETAILED DESCRIPTION

[0024] See attached Figure 1 and Figure 2 The present invention provides a front wheel turning hand wheel deflection angle measuring device, comprising a dial 1, a front splint 2, a pin 3, a rear splint 4, a movable bolt 5, a nut 6, a pin 7, an upper pointer 8, a lower pointer 9, and a T-shaped connector 10, wherein:

[0025] The dial 1 is a disc-shaped structure with a fan-shaped notch for the transmission rod of the aircraft's front wheel steering handwheel to pass through. A semicircular notch is left at the center of the dial 1, which mates with the outer wall of the transmission rod of the front wheel steering handwheel. A scale is set on the circumference of the dial 1. Let the central angle corresponding to the outer circumference of the dial 1 be N, then set N / 2 as 0°. Starting from 0°, the scale is positive clockwise and negative counterclockwise. A window is opened on the dial 1 to facilitate the alignment of the dial 1 with the 0-position scale on the aircraft's light guide plate. The window is located on the side of 0°. The scale is set so that each grid represents 1 degree, and each large grid represents 5 degrees.

[0026] The front and rear plates 2 and 4 are of a splicable structure, and both have arc-shaped central portions. When spliced ​​together, they form a clamping hole for clamping the front wheel turning handwheel transmission rod. One end of the front and rear plates 2 and 4 is connected by a pin 3, and the other end of the front and rear plates 2 and 4 is an openable or locking structure. Specifically, a slot is provided at the end of the front plate 2, and a rotatable slipknot bolt 5 is installed at the end of the rear plate 4 via a pin 7. After the slipknot bolt 5 is rotated until it is engaged with the slot, the front and rear plates 2 and 4 are locked by tightening the nut 6 on the slipknot bolt 5.

[0027] A T-shaped connector 10 is fixed to the side of the front splint 2. The T-shaped connector 10 has an upper pointer 8 and a lower pointer 9. The lower pointer 9 is connected and fixed to the 0° position of the scale on the dial 1. The upper pointer 8 and the lower pointer 9 point in opposite directions but are located on the same straight line, which passes through the center of the clamping hole formed by the splicing of the front splint 2 and the rear splint 4. The upper pointer 8 has a triangular mark shape and the lower pointer 9 has a wedge shape. When the measuring instrument is in use, the upper pointer 8 is used to align with the triangular neutral mark on the front wheel steering handwheel, and the lower pointer 9 is used to align with the neutral mark line on the light guide plate in the cockpit.

[0028] The present invention provides a front wheel turning hand wheel deflection angle measuring device in detail with reference to the accompanying drawings:

[0029] When in use, first install the dial 1 to the side of the transmission rod of the aircraft's nose wheel steering handwheel, so that the transmission rod fits into the semicircular notch of the dial 1, and at the same time, the scale line at the 0° position on the side of the window on the dial 1 is aligned with the 0-position scale line on the light guide plate. Then, clamp the transmission rod between the front clamping plate 2 and the rear clamping plate 4, and slightly rotate the measuring device to adjust the position of the measuring device so that the triangular mark on the nose wheel steering handwheel is aligned with the tip of the upper pointer 8. Then, lock the front clamping plate 2 and the rear clamping plate 4 to fix the measuring device relative to the aircraft's nose wheel steering handwheel; then, by rotating the nose wheel steering handwheel, drive the measuring device to fine-tune the position, observe through the window, and align the lower pointer 9 with the neutral mark line on the light guide plate in the cockpit. At this time, the position of the nose wheel steering handwheel is the correct installation position.

[0030] The front wheel steering handwheel deflection angle measuring device has a simple structure, is easy to operate, is lightweight and flexible, and is suitable for the installation of steering handwheels and steering wheels in various working environments. By changing the front and rear splints with different shapes, it can adapt to the installation of axle steering handwheels and steering wheels with different shapes.

Claims

1. A front wheel turning hand wheel deflection angle measuring device, characterized in that: It comprises a scale plate (1), a front clamping plate (2), a rear clamping plate (4) and a T-shaped connector (10), wherein: The scale plate (1) is a disc-shaped structure with a sector-shaped notch, a semicircular notch is left at the center of the scale plate (1), and scales are set on the circumference of the scale plate (1); The front splint (2) and the rear splint (4) are of a detachable structure, and the middle portions of the two are arc-shaped structures, and after being detached, a clamping hole for clamping the front wheel turning hand wheel transmission rod is formed; one end of the front splint (2) and the rear splint (4) are connected by a pin shaft (3), and the other end of the front splint (2) and the rear splint (4) are of an openable or locking structure; A T-shaped connector (10) is fixed on the side of the front splint (2). The T-shaped connector (10) has an upper pointer (8) and a lower pointer (9). The lower pointer (9) is connected and fixed to the 0° position of the scale on the dial (1). The upper pointer (8) and the lower pointer (9) point in opposite directions but are located on the same straight line. When in use, the upper pointer (8) is used to align with the triangular neutral mark on the front wheel turning hand wheel, and the lower pointer (9) is used to align with the neutral mark line on the light guide plate in the cockpit.

2. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: The fan-shaped notch is used for the transmission rod of the aircraft's front wheel turning hand wheel to pass through; the semicircular notch is used for matching with the outer wall of the transmission rod of the front wheel turning hand wheel.

3. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: The central angle corresponding to the outer circumference of the scale plate (1) is N, and the position N / 2 is set as 0°. Starting from 0°, the scale is positive in the clockwise direction and negative in the counterclockwise direction.

4. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: A window is provided on the scale plate (1) to facilitate the scale plate (1) to correspond to the 0-position scale on the aircraft light guide plate; wherein the window is located on the side of 0°.

5. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: For the scale setting, each grid represents 1 degree, and each large grid represents 5 degrees.

6. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: A clamping groove is provided at the end of the front splint (2), and a rotatable slipknot bolt (5) is installed at the end of the rear splint (4) via a pin (7). After the slipknot bolt (5) is rotated until it is clamped into the clamping groove, the front splint (2) and the rear splint (4) are locked by tightening a nut (6) on the slipknot bolt (5).

7. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: The straight line passes through the center of a clamping hole formed by splicing the front clamping plate (2) and the rear clamping plate (4).

8. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: The outer shape of the upper pointer (8) is a triangle mark shape, and the outer shape of the lower pointer (9) is a wedge shape.

9. The front wheel turning hand wheel deflection angle measuring device according to claim 1, characterized in that: The dial (1) is mounted on the side of the transmission rod of the front wheel steering hand wheel of the aircraft so that the transmission rod is matched with the semicircular notch of the dial (1) and the scale line at the 0° position on the side of the window of the dial 1 is aligned with the 0 position scale line on the light guide plate. The transmission rod is then clamped between the front clamping plate (2) and the rear clamping plate (4) and the dial (1) is rotated to adjust the position of the dial (1) so that the triangular mark on the front wheel steering hand wheel is aligned with the tip of the upper pointer (8). The front clamping plate (2) and the rear clamping plate (4) are then locked so that the dial (1) is fixed relative to the front wheel steering hand wheel of the aircraft. The position of the dial (1) is then fine-tuned by rotating the front wheel steering hand wheel and the lower pointer (9) is aligned with the neutral mark line on the light guide plate in the cockpit by observing through the window. At this time, the position of the front wheel steering hand wheel is the correct installation position.

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