Airplane highway transportation gravity center height inspection device

Abstract

The invention belongs to the technical field of airplane design, and relates to an airplane highway transportation gravity center height inspection device which comprises an adjusting cushion block, a supporting plate, a left spring, a right spring, a left measuring device, a right measuring device, a front spring, a front measuring device and an inspection circuit. The upper end of the right spring is supported on the right side of the supporting plate, the lower end of the right spring is fixed to the foundation, the upper end of the front spring is supported at the front end of the supporting plate, and the lower end of the front spring is fixed to the foundation. The left measuring device is arranged on the left side of the supporting plate, the right measuring device is arranged on the right side of the supporting plate, and the front measuring device is arranged at the front end of the supporting plate. The slide rheostats in the left side measuring device, the right side measuring device and the front measuring device are respectively connected with the checking circuit, and when the center of the automobile changes, the resistance value of the slide rheostat of the corresponding measuring device is increased, so that the checking circuit sends out a corresponding alarm signal.

Description

Technical Field

[0001] This invention belongs to the field of aircraft design technology, and relates to aircraft transportation scheme design technology, specifically to an aircraft road transportation center of gravity height detection device. Background Technology

[0002] To save costs or due to range limitations, aircraft are often transported by road. During road transport, aircraft are typically only disassembled, and the large size and weight of components such as wings and fuselages result in a high center of gravity for the truck. Therefore, controlling the center of gravity height during aircraft road transport is a crucial indicator and key technology in designing aircraft road transport schemes. Due to the influence of the precision of hoisting equipment and the operating experience of workers, there is an error between the actual loaded center of gravity height of the aircraft during road transport and the designed center of gravity height, which needs to be checked. However, measuring the center of gravity height after loading an aircraft onto a truck is a very difficult task. To solve the problem of the difficulty in checking the center of gravity height of aircraft during road transport, a device for checking the center of gravity height of aircraft during road transport needs to be proposed. Summary of the Invention

[0003] The purpose of this invention: To address the difficulty in checking the center of gravity height of aircraft during road transport, this invention provides a device for checking the center of gravity height of aircraft during road transport. This device can check the center of gravity height of aircraft during road transport using mechanical means and simple circuitry, providing a basis for the design of aircraft road transport plans.

[0004] Technical solution An aircraft road transport center of gravity height checking device includes an adjusting pad, a support plate, a left spring, a right spring, a left measuring device, a right measuring device, a front spring, and a front measuring device, wherein: The adjusting pad is connected to the support plate. The upper end of the left spring is supported on the left side of the support plate, and the lower end is fixed to the foundation. The upper end of the right spring is supported on the right side of the support plate, and the lower end is fixed to the foundation. The upper end of the front spring is supported at the front end of the support plate, and the lower end is fixed to the foundation. The left measuring device is set on the left side of the support plate, the right measuring device is set on the right side of the support plate, and the front measuring device is set at the front end of the support plate. It also includes a check circuit. The sliding rheostats in the left, right and front measuring devices are connected to the check circuit. When the center of the car changes, the resistance of the sliding rheostat in the corresponding measuring device increases, causing the check circuit to issue a corresponding alarm signal.

[0005] Furthermore, the left-side measuring device, the right-side measuring device, and the front measuring device have the same structure.

[0006] Furthermore, the left-side measuring device includes an extension rod, a connecting rod, a lever, a support, a piston, a hydraulic cylinder, a slide rod, and a sliding rheostat. One end of the connecting rod is movably connected to the extension rod, and the other end is movably connected to one end of the lever. The other end of the lever is movably connected to the lower end of the hydraulic cylinder. The middle part of the lever is movably connected to the support via a rotating shaft. One end of the slide rod is slidably disposed inside the hydraulic cylinder. The other end of the slide rod is a metal slide head structure that contacts the sliding rheostat and can slide on the sliding rheostat. One end of the sliding rheostat and the metal slide head structure are connected to the inspection circuit.

[0007] Furthermore, the sliding rheostat includes a front sliding rheostat, a right sliding rheostat, and a left sliding rheostat.

[0008] Further, the circuit to be checked mainly includes: power supply, main switch, protective resistor, front electromagnetic relay, front buzzer alarm, front alarm light, front voltmeter, right electromagnetic relay, right buzzer alarm, right alarm light, right voltmeter, main electromagnetic relay, main buzzer alarm, main alarm light, and main voltmeter. The power supply, main switch, protective resistor, front sliding rheostat, right sliding rheostat, and left sliding rheostat are connected in series; the front electromagnetic relay, front buzzer alarm, and front alarm light are connected in series and then in parallel with the front sliding rheostat; the front voltmeter is connected in parallel with the front sliding rheostat. The right electromagnetic relay, the right buzzer alarm, and the right alarm light are connected in series and then in parallel with the right sliding rheostat; the right voltmeter is connected in parallel with the right sliding rheostat. The main electromagnetic relay, main buzzer alarm, and main alarm light are connected in series and then in parallel with the front sliding rheostat, right sliding rheostat, and left sliding rheostat; the main voltmeter is connected in parallel with the front sliding rheostat, right sliding rheostat, and left sliding rheostat.

[0009] Furthermore, the hydraulic cylinder body is composed of two cylinders, the lower cylinder with a larger diameter and the upper cylinder with a smaller diameter. Hydraulic oil is installed inside. The piston presses the hydraulic oil from the end with the larger diameter to the end with the smaller diameter. The amount of movement of the piston will be amplified at one end of the slide rod, and the amplification factor is equal to the multiple of the cross-sectional areas of the upper and lower cylinders.

[0010] Furthermore, the slide bar is a U-shaped bar.

[0011] Furthermore, the end of the slider that mates with the sliding rheostat is made of copper.

[0012] Beneficial effects This invention proposes a device for checking the center of gravity height of aircraft transported by road. This device utilizes the height difference of the blocks to tilt the truck carrying the aircraft to one side. When the truck's center of gravity rises, the tilting torque increases, causing greater deformation of the spring on the tilted side, resulting in an increase in the resistance of the sliding rheostat and a corresponding increase in voltage. When the rated voltage of the electromagnetic relay is reached, the electromagnetic relay closes, energizing the buzzing alarm and warning light, and issuing an alarm signal. This allows for the detection of changes in the center of gravity height, preventing the vehicle from tilting too high and causing serious traffic accidents due to centrifugal force during turns. Similarly, the rheostats arranged at the front and rear can monitor changes in the distance between the center of gravity and the vehicle, preventing the center of gravity from being too far forward or backward, resulting in uneven wheel loads, excessive load on some wheels, severe wear, and safety hazards. This invention is simple to operate, has a small error margin, a clear principle, is easy to manufacture, highly practical, and easy to promote and apply, possessing significant value. Attached Figure Description

[0013] Figure 1 This is a front view of an aircraft road transport center of gravity height inspection device. Figure 2 This is a side view of an aircraft road transport center of gravity height inspection device. Figure 3 This is a top view of an aircraft road transport center of gravity height inspection device. Among them, 1-adjusting pad, 2-support plate, 3-left spring, 4-right spring, 5-left measuring device, 6-right measuring device, 7-front spring, 8-front measuring device Figure 4 This is a schematic diagram of the measuring device.

[0014] Among them, 9-extension rod, 10-connecting rod, 11-lever, 12-support, 13-piston, 14-hydraulic cylinder body, 15-slide rod, 16-sliding rheostat, 17-inspection circuit. Figure 5 This is to check the circuit diagram.

[0015] Among them, 18-power supply, 19-main switch, 20-protection resistor, 21-front sliding rheostat, 22-right sliding rheostat, 23-left sliding rheostat, 24-front electromagnetic relay, 25-front buzz alarm, 26-front alarm light, 27-front voltmeter, 28-right electromagnetic relay, 29-right buzz alarm, 30-right alarm light, 31-right voltmeter, 32-main electromagnetic relay, 33-main buzz alarm, 34-main alarm light, 35-main voltmeter.

[0016] Figure 6 Schematic diagram of support spring deformation Among them, 36-gravity, 37-lateral component force, 38-vertical component force, 39-lateral overturning moment, 40-original support plate position, 41-support plate position after deformation, 42-right side spring deformation, 43-left side spring deformation. Detailed Implementation

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] refer to Figure 1-6 This invention relates to an aircraft road transport center of gravity height inspection device. The device mainly includes: an adjusting pad 1, a support plate 2, a left spring 3, a right spring 4, a left measuring device 5, a right measuring device 6, a front spring 7, and a front measuring device 8. The adjusting pad 1 is bolted to the support plate 2. The upper end of the left spring 3 is supported on the left side of the support plate 2, and the lower end is fixed to the foundation. The upper end of the right spring 4 is supported on the right side of the support plate 2, and the lower end is fixed to the foundation. The left measuring device 5 is welded to the left side of the support plate 2, and the right measuring device 6 is welded to the right side of the support plate 2. The upper end of the front spring 7 is supported on the front end of the support plate 2, and the lower end is fixed to the foundation. The front measuring device 8 is welded to the front end of the support plate 2.

[0019] The measuring device mainly includes: extension rod 9, connecting rod 10, lever 11, support 12, piston 13, hydraulic cylinder 14, slide rod 15, sliding rheostat 16, and inspection circuit 17. One end of the extension rod 9 is welded to the support plate 2, and the other end is rotatably connected to the connecting rod 10 by a bolt; one end of the connecting rod 10 is rotatably connected to the extension rod 9, and the other end is rotatably connected to the lever 11 by a bolt; one end of the lever 11 is rotatably connected to the connecting rod 10, and the middle is rotatably connected to the support 12 by a bolt, the support 12 is fixed to the foundation, and the other end is rotatably connected to the piston 13 by a bolt; one end of the piston 13 is rotatably connected to the lever 11, and the other end is installed in the hydraulic cylinder body 14; the hydraulic cylinder body 14 is fixed to the foundation, the lower end is equipped with the piston 13, and the upper end is equipped with the slide rod 15; one end of the slide rod 15 is installed in the hydraulic cylinder body 14, and the other end is in contact with the sliding rheostat 16 and connected to the inspection alarm circuit 17 through a wire; one end of the sliding rheostat 16 is in contact with the slide rod 15, and the other end is connected to the inspection circuit 17 through a wire.

[0020] The circuit to be checked mainly includes: power supply 18, main switch 19, protective resistor 20, front sliding rheostat 21, right sliding rheostat 22, left sliding rheostat 23, front electromagnetic relay 24, front buzzer alarm 25, front alarm light 26, front voltmeter 27, right electromagnetic relay 28, right buzzer alarm 29, right alarm light 30, right voltmeter 31, main electromagnetic relay 32, main buzzer alarm 33, main alarm light 34, and main voltmeter 35. Power supply 18, main switch 19, protective resistor 20, front sliding rheostat 21, right sliding rheostat 22, and left sliding rheostat 23 are connected in series with wires. Front electromagnetic relay 24, front buzzer alarm 25, and front alarm light 26 are connected in series with wires and then in parallel with front sliding rheostat 21; front voltmeter 27 is connected in parallel with front sliding rheostat 21. The right electromagnetic relay 28, right buzzer alarm 29, and right alarm light 30 are connected in series with wires and then in parallel with the right sliding rheostat 22; the right voltmeter 31 is connected in parallel with the right sliding rheostat 22. The main electromagnetic relay 32, main buzzer alarm 33, and main alarm light 34 are connected in series with wires and then in parallel with the front sliding rheostat 21, right sliding rheostat 22, and left sliding rheostat 23; the main voltmeter 35 is connected in parallel with the front sliding rheostat 21, right sliding rheostat 22, and left sliding rheostat 23.

[0021] The adjusting pad 1 has a ramp, which makes it easy for vehicles to drive directly onto the pad. The height of the adjusting pad 1 can be changed according to different vehicles. Large vehicles use the adjusting pad 1 with a smaller height, while small vehicles use the adjusting pad 1 with a larger height.

[0022] The extension rod 19 should be extended as much as possible when space permits, as the extension rod 19 can amplify the deformation of the spring.

[0023] The connecting rod 10 is connected to other structures at both ends by a bolt, and the connecting rod 10 can rotate around the bolt.

[0024] The lever 11 is connected to other structures at both ends and in the middle by a bolt, and the lever 11 can rotate around the bolt. The middle bolt of the lever 11 is close to the connecting rod 10, and the movement of the connecting rod 10 can be amplified by the lever 11.

[0025] The hydraulic cylinder body 14 is composed of two cylinders, the lower cylinder has a larger diameter and the upper cylinder has a smaller diameter. Since the volume of hydraulic oil remains constant, when the hydraulic oil is pressed from the end with the larger diameter to the end with the smaller diameter, the movement of the lower piston 13 will be amplified at the end of the upper slide rod 15. The amplification factor is equal to the multiple of the cross-sectional area of ​​the upper and lower cylinders (the square of the diameter multiple).

[0026] The slide bar 15 is a U-shaped bar to save space. One end of the slide bar 15 is a piston mounted on the upper part of the hydraulic cylinder 14, and the other end is a copper slider that contacts the sliding rheostat and is connected to the inspection circuit 17 through a wire.

[0027] in: The main structure of this invention is a support plate 2. Adjustable pads 1 are bolted to the left side of the support plate 2, creating a height difference between the left and right sides to provide a tilting torque for the vehicle. The adjustable pads 1 have ramps on both sides, allowing the vehicle to drive directly onto them. The height difference in the adjustable pads 1 tilts the vehicle to the right. The support plate 2 is supported on both sides by a right-side spring 3 and a left-side spring 4. When the vehicle tilts to the right, the component of gravity generates a torque, causing the spring on the right side 4 to deform more significantly. The front end of the support plate 2 is supported by a front spring 7, which deforms more significantly when the vehicle's center of gravity moves forward. The left-side spring 3, right-side spring 4, and front spring 7 are connected to the left-side measuring device 5, right-side measuring device 6, and front measuring device 8. Through a series of mechanical devices, the spring deformation is converted into the resistance values ​​of the front sliding rheostats 21, right-side sliding rheostats 22, and left-side sliding rheostats 23. Finally, the resistances of the front sliding rheostats 21, right-side sliding rheostats 22, and left-side sliding rheostats 23 are connected in series in the inspection circuit 17.

[0028] The measuring device structure is as follows. The front measuring device 8, left measuring device 5, and right measuring device 6 are welded to the support plate 2 via extension rods 9. The extension rod 9 is extended as much as possible within the available installation space to amplify the deformation of the support spring. The other end of the extension rod 9 is connected to the connecting rod 10 via a bolt, and the other end of the connecting rod 10 is connected to the lever 11 via a bolt. The connecting rod 10 can rotate around the bolt, and the transition through the connecting rod 10 avoids mechanism jamming caused by deformation. The lever 11 is connected to the support 12 via a bolt in the middle, and the support 12 is fixed to the foundation. The other end of the lever 11 is connected to the piston 13 via a bolt. The lever 11 can rotate around the bolt, and the lever 11 is close to the connecting rod 10, which amplifies the displacement of the connecting rod 10. The lever 10 can also change the direction of movement, saving space in the mechanism. The other end of the piston 13 is installed at the lower part of the hydraulic cylinder body 14, and one end of the slide rod 15 is mounted on the upper part of the hydraulic cylinder body 14 with the piston attached. The hydraulic cylinder body 14 consists of two cylinders, the lower cylinder with a larger diameter and the upper cylinder with a smaller diameter. Since the volume of hydraulic oil remains constant, when the hydraulic oil is forced from the end with the larger diameter to the end with the smaller diameter, the movement of the piston 13 will be amplified at one end of the slide rod 15, which is a multiple of the cross-sectional area of ​​the upper and lower cylinders (the square of the diameter multiple). The slide rod 15 is a curved rod to save space. The other end of the slide rod 15 is a copper end, which contacts the sliding rheostat 16 and is connected to the inspection circuit 17 through a wire. The other end of the sliding rheostat 16 is also connected to the inspection circuit 17 through a wire.

[0029] The circuit 17 is checked as follows. The power supply 18, main switch 19, protective resistor 20, front sliding rheostat 21, right sliding rheostat 22, and left sliding rheostat 23 are connected in series with wires. In a series circuit, the larger the resistance, the more voltage it shares.

[0030] The right voltmeter 31 is connected in parallel with the right sliding rheostat 22. The higher the vehicle's center of gravity, the greater the vehicle's tilting moment, the greater the deformation of the spring on the tilted side (right side), the greater the resistance of the right sliding rheostat 22, and the greater the voltage. The voltage of the right voltmeter 31, connected in parallel with the right sliding rheostat 22, increases with the increase of the vehicle's center of gravity height. The voltage value of the right voltmeter 31 can indirectly measure the vehicle's center of gravity height. The right electromagnetic relay 28, the right buzzer alarm 29, and the right warning light 30 are connected in series with wires and then in parallel with the right sliding rheostat 22. When the vehicle's center of gravity height exceeds the safe value, the voltage shared by the right sliding rheostat 22 exceeds the rated voltage of the right electromagnetic relay 28, the right electromagnetic relay 28 closes, and the right buzzer alarm 29 and the right warning light 30 emit alarm signals.

[0031] Similarly, the front voltmeter 27 is connected in parallel with the front sliding rheostat 21. The further forward the vehicle's center of gravity is, the greater the deformation of the front spring 7, the greater the resistance of the front sliding rheostat 21, and the greater the voltage. The voltage of the front voltmeter 27, connected in parallel with the front sliding rheostat 21, increases as the vehicle's center of gravity moves forward. The voltage value of the front voltmeter 27 can indirectly measure the distance between the vehicle's center of gravity and the front. The front electromagnetic relay 24, the front siren 25, and the front warning light 26 are connected in series with wires and then in parallel with the front sliding rheostat 21. When the distance between the vehicle's center of gravity and the front exceeds a safe value, the voltage shared by the front sliding rheostat 21 exceeds the rated voltage of the front electromagnetic relay 24, causing the front electromagnetic relay 24 to close, and the front siren 25 and the front warning light 26 to emit alarm signals.

[0032] The total voltmeter 35 is connected in parallel with the front sliding rheostat 21, the right sliding rheostat 22, and the left sliding rheostat 23. When the vehicle weight increases, the deformation of the three support springs increases, the resistance of the three sliding rheostats increases, and the total voltage they share in the circuit increases, resulting in an increase in the voltage measured by the total voltmeter 35. The voltage value of the total voltmeter 35 can be used to indirectly measure the weight of the vehicle.

[0033] The center of gravity detection device of the present invention can detect and measure the changes in the center of gravity on the left and right sides. However, when detecting the weight of a vehicle, the voltage values ​​of the front sliding rheostat 21, the right sliding rheostat 22, and the left sliding rheostat 23 need to be used simultaneously.

[0034] By observing the voltage value of the right voltmeter 31, the vehicle's center of gravity height can be checked; by observing the voltage value of the front voltmeter 27, the distance between the vehicle's center of gravity and the front / rear sides can be checked; and by observing the total voltmeter 35, the vehicle's total weight can be checked. The voltage of the variable resistors arranged on the left and right sides can monitor changes in the center of gravity height, keeping it within a safe range and preventing the vehicle from tilting due to centrifugal force during turns, which could lead to serious traffic accidents. Similarly, the voltage of the variable resistors arranged at the front and rear can monitor changes in the distance between the center of gravity and the rear sides, preventing the vehicle's center of gravity from being too far forward or backward, resulting in uneven wheel loads, excessive load on some wheels, severe wear, and safety hazards. This invention is simple to operate, has a small error margin, a clear principle, is easy to produce, highly practical, and easy to promote and apply, possessing significant value.

Claims

1. A device for checking the center of gravity height of an aircraft during road transport, characterized in that, Includes an adjusting pad (1), a support plate (2), a left spring (3), a right spring (4), a left measuring device (5), a right measuring device (6), a front spring (7), and a front measuring device (8), wherein: The adjusting pad (1) is connected to the support plate (2). The upper end of the left spring (3) is supported on the left side of the support plate (2), and the lower end is fixed on the foundation. The upper end of the right spring (4) is supported on the right side of the support plate (2), and the lower end is fixed on the foundation. The upper end of the front spring (7) is supported on the front end of the support plate (2), and the lower end is fixed on the foundation. The left measuring device (5) is set on the left side of the support plate (2), the right measuring device (6) is set on the right side of the support plate (2), and the front measuring device (8) is set on the front end of the support plate (2). It also includes a check circuit. The sliding rheostats in the left measuring device (5), right measuring device (6) and front measuring device (8) are respectively connected to the check circuit. When the center of the car changes, the resistance of the sliding rheostat of the corresponding measuring device increases, causing the check circuit to issue a corresponding alarm signal.

2. The aircraft road transport center of gravity height inspection device according to claim 1, characterized in that, The left measuring device (5), the right measuring device (6), and the front measuring device (8) have the same structure.

3. The aircraft road transport center of gravity height inspection device according to claim 2, characterized in that, The left measuring device (5) includes an extension rod (9), a connecting rod (10), a lever (11), a support (12), a piston (13), a hydraulic cylinder (14), a slide rod (15), and a sliding rheostat (16). One end of the connecting rod (10) is movably connected to the extension rod (9), and the other end is movably connected to one end of the lever (11). The other end of the lever (11) is movably connected to the lower end of the hydraulic cylinder (14). The middle part of the lever (11) is movably connected to the support (12) through a rotating shaft. One end of the slide rod (15) is slidably disposed inside the hydraulic cylinder (14), and the other end of the slide rod (15) is a metal slide head structure that contacts the sliding rheostat (16) and can slide on the sliding rheostat (16). One end of the sliding rheostat (16) and the metal slide head structure are connected to the inspection circuit (17).

4. The aircraft road transport center of gravity height inspection device according to claim 4, characterized in that, The sliding rheostat (16) includes a front sliding rheostat (21), a right sliding rheostat (22), and a left sliding rheostat (23).

5. The aircraft road transport center of gravity height inspection device according to claim 5, characterized in that, The circuit to be checked mainly includes: power supply (18), main switch (19), protective resistor (20), front electromagnetic relay (24), front buzzer alarm (25), front alarm light (26), front voltmeter (27), right electromagnetic relay (28), right buzzer alarm (29), right alarm light (30), right voltmeter (31), main electromagnetic relay (32), main buzzer alarm (33), main alarm light (34), and main voltmeter (35); The power supply (18), main switch (19), protective resistor (20), front sliding rheostat (21), right sliding rheostat (22), and left sliding rheostat (23) are connected in series; the front electromagnetic relay (24), front buzzer alarm (25), and front alarm light (26) are connected in series and then in parallel with the front sliding rheostat (21); the front voltmeter (27) is connected in parallel with the front sliding rheostat (21); The right electromagnetic relay (28), the right buzzer alarm (29), and the right alarm light (30) are connected in series and then in parallel with the right sliding rheostat (22); the right voltmeter (31) is connected in parallel with the right sliding rheostat (22); The main electromagnetic relay (32), the main buzzer alarm (33), and the main alarm light (34) are connected in series and then connected in parallel with the front sliding rheostat (21), the right sliding rheostat (22), and the left sliding rheostat (23); the main voltmeter (35) is connected in parallel with the front sliding rheostat (21), the right sliding rheostat (22), and the left sliding rheostat (23).

6. The aircraft road transport center of gravity height inspection device according to claim 6, characterized in that, The hydraulic cylinder body (14) is composed of two cylinders, the lower cylinder has a larger diameter and the upper cylinder has a smaller diameter. Hydraulic oil is installed inside. The piston (17) presses the hydraulic oil from the end with the larger diameter to the end with the smaller diameter. The movement of the piston (13) will be amplified at one end of the slide rod (15). The amplification factor is equal to the multiple of the cross-sectional areas of the upper and lower cylinders.

7. The aircraft road transport center of gravity height inspection device according to claim 7, characterized in that, The slide bar (15) is a U-shaped bar.

8. The aircraft road transport center of gravity height inspection device according to claim 8, characterized in that, The end of the slider (15) that mates with the sliding rheostat (16) is made of copper.

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