A skid helicopter tow wheel auxiliary power unit

Abstract

This invention belongs to the field of helicopter routine maintenance and support technology, specifically relating to an auxiliary power device for a skid helicopter tugwheel. The auxiliary power device includes a housing, a fixed base, a power source, a power drive mechanism, and a friction wheel. The fixed base is fixed to the rocker arm of the tugwheel. The housing and the fixed base form an installation space accommodating the power source and the power drive mechanism. The friction wheel is connected to the power drive mechanism via a transmission mechanism. One corner of the housing is rotatably connected to the fixed base, and a support spring is provided between the free end of the housing and the fixed base, and is fixed by an adjusting handle. The power source supplies power to the power drive mechanism and outputs a certain rotational speed to drive the friction wheel to rotate. The position between the friction wheel and the tugwheel tire can be adjusted by the housing.

Description

Technical Field

[0001] This invention belongs to the field of helicopter routine maintenance and support technology, specifically relating to an auxiliary power device for skid helicopter tug wheels. Background Technology

[0002] For a skid helicopter widely used by a training brigade in China, the movement of the helicopter in daily operations is inseparable from a special type of tug wheel. Figure 1 The two tow wheels are fixed to specific positions on the left and right skis respectively. Hooks (a) on the tow wheels can engage with special bolts on the skis. Manually cranking hydraulic rod (b) drives rocker arm (c) to rotate, thereby lifting the 2-ton helicopter by approximately 20 cm. The lifting effect is as follows... Figure 2 As shown. However, the tug wheel's tires (d) have no power, requiring at least three maintenance personnel to push the helicopter. In field environments, skid helicopters sometimes need to move short distances and sometimes long distances. Short distances can be accomplished manually, but long-distance transfers require a large number of personnel, wasting significant manpower and resulting in slow movement. To reduce the burden on maintenance personnel and improve efficiency during long-distance transfers, this auxiliary power unit was designed. Summary of the Invention

[0003] The purpose of this invention is to provide an auxiliary power device for skid helicopter tug wheels, which provides auxiliary power to the tug wheels during routine maintenance of skid helicopters, while minimizing disruption to the normal use of existing tug wheels, facilitating adjustment and disassembly, and avoiding additional routine maintenance.

[0004] The technical solution of this invention is as follows: An auxiliary power device for a skid helicopter tugwheel, comprising a housing, a fixed base, a power source, a power drive mechanism, and a friction wheel; the fixed base is fixed to the rocker arm of the tugwheel; the housing and the fixed base form an installation space for accommodating the power source and the power drive mechanism; the friction wheel is connected to the power drive mechanism via a transmission mechanism; one corner of the housing is rotatably connected to the fixed base, and a support spring is provided between the free end of the housing and the fixed base, and is fixed by an adjusting handle; the power source supplies power to the power drive mechanism and outputs a certain rotational speed to drive the friction wheel to rotate; the position between the friction wheel and the tugwheel tire can be adjusted by the housing; when auxiliary power is needed, the adjusting handle is tightened to make the friction wheel and tire tightly engaged, and the rotational speed of the power drive mechanism is adjusted to provide auxiliary power at different speeds to the tugwheel; when auxiliary power is not needed, the adjusting handle is loosened, the support spring will spring up the housing, and the friction wheel will detach from the tire, allowing it to be used as a regular tugwheel.

[0005] Furthermore, the power drive mechanism includes a motor, a turbine, and a worm gear; the turbine and worm gear set reduces the output power of the motor and increases the torque to drive the friction wheel to rotate.

[0006] Furthermore, the interior of the housing adopts a layered design, with the power drive mechanism located on the upper layer and the power supply located on the lower layer.

[0007] Furthermore, the power source is a rechargeable lithium battery pack, which is fixed inside the housing.

[0008] Furthermore, a rechargeable interface is provided on the side of the housing, which can also serve as a power supply interface for an external power source.

[0009] Furthermore, the motor is also equipped with a wired control handle, and a through hole is provided on the housing for the wired control handle. By pushing the sliding button on the wired control handle, the motor speed can be adjusted, thereby providing auxiliary power to the tractor wheel at different speeds.

[0010] Furthermore, a small winch is also provided inside the housing. When not in use, the control cable of the wired handle is wound up and stored on the small winch inside, and can be pulled out directly when in use.

[0011] Furthermore, the slider switch on the hand-held remote control is equipped with a reset spring, which will automatically move to the zero-speed position when no force is applied.

[0012] Furthermore, an emergency shut-off switch is also provided on the housing for directly cutting off the power supply to the motor in an emergency.

[0013] The beneficial effects of this invention are as follows: This invention is fixed to the rocker arm of the tractor wheel by two large bolts at the bottom, allowing it to be permanently fixed to the tractor wheel without affecting daily use. The auxiliary power device proposed in this invention does not require modification of the existing tractor wheel during installation and use, and does not affect the original structure and function of the tractor wheel after installation. When long-distance helicopter transfer is required, simply tighten the adjusting handle to ensure a tight fit between the friction wheel and the tire, and adjust the motor speed by pushing the sliding button on the wire control handle to provide auxiliary power to the tractor wheel at different speeds. When short-distance transfer is required or auxiliary power is not needed, simply loosen the adjusting handle, and the support spring will spring up the main housing, causing the friction wheel to detach from the tire, allowing it to be used as a regular tractor wheel.

[0014] It uses a 14.8V 20000mAh lithium battery pack, and the motor has a maximum power of 150W. Theoretically, with an 80% energy transfer efficiency, the motor can run at full power for approximately 100 minutes. A charging port is located on the outside for convenient charging. A clearly marked emergency stop switch is also located on the outside, which can directly cut off the motor power supply to prevent malfunction of the remote control handle and ensure rapid stopping in emergencies. The motor speed is controlled by sliding the slider on the telescopic remote control handle. The control cable is wound up and stored on an internal winch when not in use and can be pulled out directly when needed. The slider switch on the remote control handle has a return spring inside, which automatically moves to the zero-speed position when no force is applied, preventing the motor from starting automatically without supervision. Attached Figure Description

[0015] Figure 1 A schematic diagram of tug wheels used for the maintenance of skid helicopters;

[0016] Figure 2 This is a schematic diagram showing the tugboat wheels in the lifting position.

[0017] Figure 3 This is a schematic diagram of the auxiliary power device structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the auxiliary power device of the present invention;

[0019] Figure 5 This is a schematic diagram of the installation and working state of the present invention;

[0020] Among them, 1-bolt, 2-adjusting handle, 3-lithium battery, 4-brushed motor, 5-turbine, 6-worm gear, 7-friction wheel, 8-main housing, 9-emergency shut-off switch, 10-charging interface, 11-small winch, 12-wire control handle, 13-fixed base, a-hook, b-hydraulic rod, c-rocker arm, d-tire. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] See appendix Figure 3 , 45. An auxiliary power device for skid helicopter tug wheels designed in this invention includes a bolt 1, an adjusting handle 2, a lithium battery 3, a brushed motor 4, a turbine 5, a worm gear 6, a friction wheel 7, a main housing 8, an emergency cut-off switch 9, a charging interface 10, a small winch 11, a wired control handle 12, and a fixing base 13.

[0023] The main structure of the auxiliary power unit is a main housing 8, which houses a lithium battery 3, a brushed motor 4, a turbine 5, a worm gear 6, and a small winch 11. The lithium battery 3 provides power to the brushed motor 4. The worm gear 6 is mounted on the power shaft of the brushed motor 4. The turbine 5 is mounted on the main housing 8 and connected to the friction wheel 7 via the same shaft. The small winch 11 is installed inside the main housing 8 and its main function is to store the cable of the wired control handle 12.

[0024] The exterior of the main housing 8 mainly includes bolts 1, a fixing base 13, an adjusting handle 2, a friction wheel 7, an emergency shut-off switch 9, a charging port 10, and a wired control handle 12. The bolts 1 on the fixing base 13 connect to the mounting holes on the tractor wheel rocker arm. The adjusting handle 2 can change the mounting angle of the main housing 8, thereby adjusting the tightness between the friction wheel 7 and the tractor wheel tire. The emergency shut-off switch 9, the charging port 10, and the wired control handle 12 are located on the side of the main housing. The emergency shut-off switch 9 can quickly cut off the power to the brushed motor 4, causing the tractor wheel to stop moving rapidly. The charging port 10 is used to charge the lithium battery 3 inside the main housing 8. The wired control handle 12 is used to control the direction and speed of the brushed motor 4, thereby controlling the rotation speed of the tractor wheel.

[0025] In the specific implementation case, the auxiliary power unit uses a 14.8V 20000mAh lithium battery pack for its lithium battery 3. The motor has a maximum power of 150W. Theoretically, with an 80% energy transfer efficiency, the motor can run at full power for approximately 100 minutes. A charging port is located on the outside for convenient charging. A clearly visible emergency stop switch is also located on the outside to directly cut off the motor power supply, preventing malfunction of the remote control handle and ensuring rapid cessation of rotation in emergencies. The motor speed is controlled by sliding the slider on the telescopic remote control handle. The control cable is wound up and stored in an internal winch when not in use, and can be pulled out directly when needed. The slider switch on the remote control handle has a return spring inside, which automatically moves to the zero-speed position when no force is applied, preventing the motor from rotating automatically without supervision. During use, when a long-distance helicopter transfer is required, simply tighten the adjustment handle to ensure a tight fit between the friction wheel and the tire. Then, adjust the motor speed by pushing the sliding button on the control handle to provide auxiliary power at different speeds to the tractor wheel. For daily short-distance transfers or when auxiliary power is not required, simply loosen the adjustment handle. The support spring will then spring up the main body shell, disengaging the friction wheel from the tire, allowing it to be used as a regular tractor wheel.

[0026] The key design features of this invention are reflected in the following aspects:

[0027] Key point 1: The brushed motor 4 is powered by the lithium battery 3, and the output power of the motor is reduced and the torque is increased by a pair of worm gears 5 and 6.

[0028] Key point 2: Auxiliary power is provided to the tractor wheel through the friction between the external friction wheel 7 and the tire d;

[0029] Key point 3: Secure it to the rocker arm of the tractor wheel using the two large bolts 1 at the bottom;

[0030] Key point 4: By rotating the adjustment handle 2, the angle between the main body housing 8 and the fixed base 13 can be adjusted, thereby adjusting the tightness of the connection between the friction wheel 7 and the tire d;

[0031] Key point 5: The motor speed can be adjusted via the wired control handle 12, thereby adjusting the rotation speed of the wheel;

[0032] Key point 6: An emergency shut-off switch 9 is provided to directly cut off the power supply to the motor, ensuring that rotation can be stopped quickly in an emergency.

[0033] The above description is merely a specific embodiment of the present invention, providing a detailed description of the invention. Parts not covered herein are conventional techniques. However, the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A skid helicopter tug wheel auxiliary power device, characterized in that, The auxiliary power unit includes a housing, a fixed base, a power source, a power drive mechanism, and a friction wheel. The fixed base is fixed to the rocker arm of the tractor wheel. The housing and the fixed base form an installation space for accommodating the power source and the power drive mechanism. The friction wheel is connected to the power drive mechanism via a transmission mechanism. One corner of the housing is rotatably connected to the fixed base. A support spring is provided between the free end of the housing and the fixed base, and is fixed by an adjusting handle. The power source supplies power to the power drive mechanism and outputs a certain speed to drive the friction wheel to rotate. The position between the friction wheel and the tractor wheel tire can be adjusted by the housing. When auxiliary power is needed, the adjusting handle is tightened to make the friction wheel and tire tightly engage. By adjusting the speed of the power drive mechanism, different speeds of auxiliary power are provided to the tractor wheel. When auxiliary power is not needed, the adjusting handle is loosened, and the support spring will spring up the housing, causing the friction wheel to detach from the tire, allowing it to be used as a regular tractor wheel.

2. The skid helicopter tug wheel auxiliary power device as described in claim 1, characterized in that, The power drive mechanism includes a motor, a worm gear, and a worm; the worm gear and worm gear set reduce the output power of the motor and increase the torque to drive the friction wheel to rotate.

3. The skid helicopter tug wheel auxiliary power device as described in claim 1, characterized in that, The housing has a layered design, with the power drive mechanism located on the upper layer and the power supply located on the lower layer.

4. The skid helicopter tug wheel auxiliary power device as described in claim 1, characterized in that, The power source is a rechargeable lithium battery pack, which is fixed inside the housing.

5. The skid helicopter tug wheel auxiliary power device as described in claim 1, characterized in that, The housing has a rechargeable interface on its side, which can also be used as a power supply interface for an external power source.

6. The skid helicopter tug wheel auxiliary power device as described in claim 2, characterized in that, The motor is also equipped with a wired control handle, with a through hole on the housing for the handle. The motor speed is adjusted by pushing the sliding button on the wired control handle, thereby providing auxiliary power to the tractor wheels at different speeds.

7. The skid helicopter tug wheel auxiliary power device as described in claim 6, characterized in that, The housing also contains a small winch, and the control cable of the wired handle is wound up and stored on the small winch when not in use, and can be pulled out directly when needed.

8. The skid helicopter tug wheel auxiliary power device as described in claim 7, characterized in that, The slider switch on the wired handle is equipped with a reset spring, which will automatically move to the zero speed position when no force is applied.

9. The skid helicopter tug wheel auxiliary power device as described in claim 1, characterized in that, An emergency shut-off switch is also provided on the housing to directly cut off the power supply to the motor in an emergency.

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