Integrated green coasting drive

Abstract

The application belongs to the field of green electric taxiing technology of aircraft, and particularly relates to an integrated green taxiing driving device, wherein an in-shaft adapter is fixed with an aircraft landing gear wheel shaft, and an electric motor is installed on the in-shaft adapter; the middle part of a center gear shaft is a gear, both ends of the center gear shaft are transmission shafts, and both ends of the transmission shafts are provided with outer splines; a motor output shaft is connected with the outer spline of one end of the center gear shaft through an inner spline to transmit power; three groups of planetary gear assemblies are connected with the in-shaft adapter and are distributed along the circumference of the center gear shaft; the three groups of planetary gear assemblies are connected with a wind collector support through gears, the wind collector support is connected with an aircraft wheel hub; the gears of the center gear shaft are connected with the three groups of planetary gear assemblies and transmit power to the planetary gear assemblies to drive the wheel movement; one end of a planet carrier is connected with a planetary gear assembly, and the other end of the planet carrier is connected with a fan assembly; the other end of the center gear shaft is connected with the fan assembly through a spline to transmit power.

Description

Technical Field

[0001] This invention belongs to the field of green electric taxiing technology for aircraft, and specifically relates to an integrated green taxiing drive device. Background Technology

[0002] Traditional fixed-wing aircraft rely mostly on engine thrust or ground trailers for gliding. During the gliding phase before and after each flight, the engine consumes a large amount of fuel. This method is considered inefficient and causes significant energy waste and environmental pollution.

[0003] Existing green electric taxiing systems primarily involve mounting a motor on the landing gear and fixing gears to the wheel hubs. Power is transmitted from the motor to the wheels via a timing belt, driving the wheels to rotate and thus propelling the aircraft. While this method is effective, it also increases the aircraft's weight.

[0004] Patent CN102897325A discloses an aircraft taxiing system that includes a transmission chain. This aircraft taxiing system has a motor installed on the landing gear and a transmission chain device that can perform both engagement and disengagement functions. The power generated by the motor is transmitted to the aircraft wheels through the transmission chain, which moves the aircraft on the ground. When the aircraft is not taxiing, such as during takeoff or landing, the transmission chain can be disengaged from the aircraft wheels. When needed, it can be engaged with the aircraft wheels. This patented chain drive has low transmission efficiency, large size, and takes up a lot of space.

[0005] Patent CN 107933948 A discloses an efficient aircraft ground taxiing system, which specifically involves setting up two movable arms to allow the tire to enter between the two arms, with rollers attached to the inner wall of the wheel hub, and a drive wheel pressed against the tire. The power unit transmits power through the gearbox to drive the drive wheel to rotate, and the drive wheel drives the tire to rotate. This patent uses two movable arms to make the rollers drive the wheel hub to rotate through friction. This method has the risk of slippage, low transmission efficiency, easy damage to the tire, large gearbox size, low space utilization, and heavy weight.

[0006] Patent CN 107878775 A discloses an aircraft ground taxiing wheel drive system. Specifically, a power unit and gearbox are mounted on the frame. A turntable and a support device are installed at the other end of the gearbox. During operation, the support shoe moves outward, pressing against the inner side of the wheel hub. The power unit generates torque, which, after passing through the gearbox, drives the support device to rotate, thereby transmitting power to the wheels to achieve taxiing. This aircraft ground taxiing wheel drive system uses a gearbox transmission. The gearbox is large, has low space utilization, and is heavy. Furthermore, it relies on friction transmission, resulting in low efficiency and poor transmission stability. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated green taxiing drive device for aircraft. This integrated green taxiing drive device is a novel solution for driving aircraft during ground taxiing. This invention also enables aircraft brake cooling. The device features high integration, a compact structure, light weight, and comprehensive functionality. It effectively solves the problem of aircraft relying on engine thrust or ground trailers during ground taxiing.

[0008] The technical solution is as follows:

[0009] An integrated green gliding drive device includes: an electric motor, an internal adapter, a central gear shaft, three sets of planetary gear assemblies, a wind collector bracket, a planetary carrier, and a fan assembly;

[0010] The internal adapter is fixed to the landing gear axle of the aircraft, and the electric motor is installed inside the internal adapter.

[0011] The central gear shaft has a gear in the middle and transmission shafts at both ends, and both ends of the transmission shafts are provided with external splines.

[0012] The motor output shaft is connected to the external spline at one end of the central gear shaft via an internal spline to transmit power.

[0013] The three sets of planetary gear assemblies are connected to the internal adapter and are evenly distributed circumferentially around the central gear shaft;

[0014] The three sets of planetary gear assemblies are connected to the wind shroud support via gears, and the wind shroud support is connected to the wheel hub of the aircraft; the gears of the central gear shaft are all connected to the three sets of planetary gear assemblies and transmit power to the planetary gear assemblies to drive the wheels to move;

[0015] One end of the planetary carrier is connected to the planetary gear assembly, and the other end is connected to the fan assembly;

[0016] The other end of the central gear shaft is connected to the fan assembly via a spline to transmit power.

[0017] Furthermore, the device also includes: an electromagnet and a permanent magnet;

[0018] The electromagnet is sleeved on the output shaft of the motor and fixed to the motor with screws;

[0019] The permanent magnet is fixed to the gear on the side of the central gear shaft near the motor.

[0020] By applying positive and negative currents to the electromagnet, the electromagnet attracts or repels the permanent magnet, thereby driving the central gear shaft to move axially, so as to control whether the central gear shaft meshes with the planetary gear assembly and / or the fan assembly.

[0021] Furthermore, the wind collector cover bracket is a ring-shaped component, with its outer side connected and fixed to the aircraft wheel hub by screws; the inner side is provided with gears for connection with the planetary gear assembly.

[0022] Furthermore, each planetary gear assembly includes: a planetary gear shaft, a planetary gear bearing, a planetary gear, and a sleeve;

[0023] One end of the planetary gear shaft is fixed to the internal adapter by a screw, and the other end is fixed to the planet carrier by a screw.

[0024] The planetary gear bearing is sleeved on the planetary gear shaft, and the planetary gear is sleeved on the planetary gear bearing; the planetary gear meshes with both the gear on the central gear shaft and the gear on the wind collector bracket.

[0025] Furthermore, the fan assembly includes: a fan shaft bracket, a fan bearing, a fan shaft, and a fan;

[0026] The fan shaft is provided with an internal spline that engages with the external spline of the central gear shaft;

[0027] The fan shaft bracket is fixed to the planetary carrier by screws; a fan bearing is sleeved on the fan shaft, and the fan bearing is fixedly connected to the fan shaft bracket to provide support for the fan shaft;

[0028] The fan is mounted on the fan shaft.

[0029] Furthermore, a first axial limiting platform is provided on the inner side of the fan shaft to limit the axial movement range of the central gear when it moves along one side of the fan assembly.

[0030] Both sides of the central gear shaft are provided with annular limiting platforms to limit the axial movement range of the central gear shaft.

[0031] Furthermore, when a positive current is applied to the electromagnet, a repulsive force is generated between the electromagnet and the permanent magnet, and the central gear shaft moves to the side of the fan assembly; the central gear shaft meshes with the planetary gears, while the external spline of the central gear shaft near the fan assembly disengages from the internal spline of the fan shaft, the motor only drives the planetary gears to rotate, and the fan stops working;

[0032] When a reverse current is applied to the electromagnet, an attractive force is generated between the electromagnet and the permanent magnet, and the central gear shaft moves to the side of the motor. The central gear shaft disengages from the planetary gears, while the external spline of the central gear shaft near the fan assembly meshes with the internal spline of the fan shaft. The motor only drives the fan to rotate, and the planetary gears stop working.

[0033] The external spline on the side of the central gear shaft closest to the motor is always engaged with the motor output shaft.

[0034] Furthermore, the outer surface of the fan shaft is provided with a keyway along the axial direction, and a single key is provided in the central hole of the fan. The single key and the keyway are used to connect and fix the fan and the fan shaft.

[0035] The fan shaft has an external thread on the side away from the central gear shaft, and a round nut is located on the outside of the fan and screwed onto the fan shaft to lock the fan in place.

[0036] A retaining washer is provided between the round nut and the fan.

[0037] Compared with the prior art, this application has the following technical advantages:

[0038] 1. Small size and light weight: This green gliding drive device provides the torque required for wheel rotation through planetary gear reducer transmission. The entire device is small in size, which can effectively reduce the weight of the original electric gliding device and thus reduce the weight of the whole machine.

[0039] 2. Energy-saving and environmentally friendly: When the aircraft is taxiing, it does not use engine thrust or ground trailers, thus avoiding fuel waste.

[0040] 3. Integration: This integrated green gliding drive unit combines the gliding drive unit and the cooling fan unit into one, powered by a single AC motor to achieve both functions. It can be switched at will according to needs, and does not require major modifications to the existing structure of the wheels, making maintenance convenient. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings will be described below.

[0042] Figure 1 Front view of the integrated green gliding drive system structure;

[0043] Figure 2 Right view of the integrated green gliding drive system structure;

[0044] Figure 3 Right view of the integrated green gliding drive structure (fanless assembly);

[0045] Figure 4 Cross-sectional view of the integrated green gliding drive device;

[0046] Figure 5 Schematic diagram of the integrated green gliding drive device structure and installation;

[0047] Wherein: 1-Motor; 2-Internal adapter; 3-Electromagnet; 4-Permanent magnet; 5-Central gear shaft; 6-Planet carrier; 7-Planet gear shaft; 8-Sleeve; 9-Planet gear bearing; 10-Planet gear; 11-Air collector bracket; 12-Fan shaft bracket; 13-Fan bearing; 14-Fan shaft; 15-Fan; 16-Stabilizing washer; 17-Round nut; 18-Key. Detailed Implementation

[0048] To make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail and completely below with reference to the accompanying drawings of the embodiments of the present invention. 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 skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0049] The present invention will now be described in further detail with reference to the accompanying drawings:

[0050] refer to Figures 1-5 An integrated green gliding drive device includes an electric motor 1, an internal adapter 2, an electromagnet 3, a permanent magnet 4, a central gear shaft 5, a planetary carrier 6, a planetary gear shaft 7, a sleeve 8, a planetary gear bearing 9, a planetary gear 10, a fan shroud bracket 11, a fan shaft bracket 12, a fan bearing 13, a fan shaft 14, a fan 15, a locking washer 16, a round nut 17, and a key 18.

[0051] The motor 1 is fixedly mounted on the internal adapter 2, and the internal adapter 2 is then fixedly mounted on the landing gear wheel axle of the aircraft.

[0052] The electromagnet 3 is sleeved on the motor shaft and fixedly mounted on the motor 1 by screws, while the permanent magnet 4 is fixedly mounted on the central gear shaft 5.

[0053] The motor 1 shaft has an internal spline, and the central gear shaft 5 has an external spline at one end. The motor 1 and the central gear shaft 5 are connected by splines to transmit power. There are three planetary gear shafts 7, which are fixedly installed on the internal adapter 2 by screws. There are three planetary gears 10, which are installed on the planetary gear shafts 7 together with three sleeves 8 and planetary gear bearings 9. The wind collector bracket 11 has an internal gear, which together with the planetary gears 10 and the central gear shaft 5 constitutes an electric gliding drive device (planetary gear reducer). The wind collector bracket 11 has screw connection holes, which can be connected to the aircraft wheel hub by screws to transmit torque.

[0054] The planet carrier 6 is fixedly mounted on the three planetary gear shafts 8 by screws.

[0055] The central gear shaft 5 has an external spline at its other end, and the fan shaft 14 has an internal spline. The central gear shaft 5 and the fan shaft 14 are connected by splines to transmit power. The fan shaft bracket 12 and the fan bearing 13 are mounted together on the fan shaft 14. The fan shaft bracket 12 is fixedly mounted on the planetary carrier 6 with screws, serving to support the fan shaft.

[0056] The key 18 is fixed to the fan 15 by screws and installed on the fan shaft 14 by key connection. The stop washer 16 and round nut 17 are installed on the fan shaft 14.

[0057] The working principle of this integrated green gliding drive device:

[0058] 1. When the electric gliding function is required, the electromagnet 3 is energized, and a repulsive force is formed between the electromagnet 3 and the opposite surface of the permanent magnet 4, which moves the central gear shaft 5 outward. The central gear shaft 5 meshes with the planetary gear 10. At this time, the motor shaft 1 rotates, which drives the central gear shaft 5 to rotate. The central gear shaft 5 drives the planetary gear 10 to rotate, and the planetary gear 10 drives the wind collector bracket 11 to rotate. Since the wind collector bracket 11 is fixedly connected to the aircraft wheel hub, it drives the wheel hub to rotate, thus driving the aircraft to move forward to achieve the electric gliding function.

[0059] 2. When the cooling fan is needed, the electromagnet 3 is energized, forming an attractive force with the opposite surface of the permanent magnet 4, which moves the central gear shaft 5 inward. The central gear shaft 5 disengages from the planetary gear 10, and at the same time, the central gear shaft 5 meshes with the fan shaft 14 through splines. At this time, the motor shaft 1 rotates, driving the central gear shaft 5 to rotate. The central gear shaft 5 drives the fan shaft 14 to rotate, and the fan shaft 14 drives the fan 15 to rotate, thus realizing the cooling function of the fan.

Claims

1. An integrated green gliding drive device, characterized in that: The device includes: a motor, an internal adapter, a central gear shaft, three sets of planetary gear assemblies, a fan shroud support, a planetary carrier, a fan assembly, an electromagnet, and a permanent magnet; The internal adapter is fixed to the landing gear axle of the aircraft, and the electric motor is installed inside the internal adapter. The central gear shaft has a gear in the middle and transmission shafts at both ends, and both ends of the transmission shafts are provided with external splines. The motor output shaft is connected to the external spline at one end of the central gear shaft via an internal spline to transmit power. The three sets of planetary gear assemblies are connected to the internal adapter and are evenly distributed circumferentially around the central gear shaft; The three sets of planetary gear assemblies are connected to the wind shroud support via gears, and the wind shroud support is connected to the wheel hub of the aircraft; the gears of the central gear shaft are all connected to the three sets of planetary gear assemblies and transmit power to the planetary gear assemblies to drive the wheels to move; One end of the planetary carrier is connected to the planetary gear assembly, and the other end is connected to the fan assembly; The other end of the central gear shaft is connected to the fan assembly via a spline to transmit power. The planetary gears of each planetary gear assembly mesh simultaneously with the gears of the central gear shaft and the gears of the air collector bracket; the fan shaft of the fan assembly is provided with an internal spline that engages with the external spline of the central gear shaft. The electromagnet is sleeved on the output shaft of the motor and fixed to the motor with screws; the permanent magnet is fixed to the gear on the side of the central gear shaft near the motor. When a positive current is applied to the electromagnet, a repulsive force is generated between the electromagnet and the permanent magnet, causing the central gear shaft to move towards the fan assembly. The central gear shaft meshes with the planetary gears, while the external spline on the side of the central gear shaft near the fan assembly disengages from the internal spline on the fan shaft. The motor only drives the planetary gears to rotate, and the fan stops working. When a reverse current is applied to the electromagnet, an attractive force is generated between the electromagnet and the permanent magnet, causing the central gear shaft to move towards the motor. The central gear shaft disengages from the planetary gears, while the external spline on the side of the central gear shaft near the fan assembly meshes with the internal spline on the fan shaft. The motor only drives the fan to rotate, and the planetary gears stop working. The external spline on the side of the central gear shaft near the motor is always engaged with the motor output shaft.

2. The apparatus according to claim 1, characterized in that: The wind collector cover bracket is a ring-shaped component, with its outer side connected and fixed to the aircraft wheel hub by screws; the inner side is equipped with gears for connection with the planetary gear assembly.

3. The apparatus according to claim 2, characterized in that: Each planetary gear assembly includes: a planetary gear shaft, a planetary gear bearing, planetary gears, and a sleeve; One end of the planetary gear shaft is fixed to the internal adapter by screws, and the other end is fixed to the planet carrier by screws; The planetary gear bearing is mounted on the planetary gear shaft, and the planetary gear is mounted on the planetary gear bearing.

4. The apparatus according to claim 3, characterized in that: The fan assembly includes: a fan shaft bracket, a fan bearing, a fan shaft, and a fan; The fan shaft bracket is fixed to the planetary carrier by screws; a fan bearing is sleeved on the fan shaft, and the fan bearing is fixedly connected to the fan shaft bracket to provide support for the fan shaft; The fan is mounted on the fan shaft.

5. The apparatus according to claim 4, characterized in that: The inner side of the fan shaft is provided with a first axial limiting platform, which is used to limit the axial movement range of the central gear when it moves along one side of the fan assembly. Both sides of the central gear shaft are provided with annular limiting platforms to limit the axial movement range of the central gear shaft.

6. The apparatus according to claim 5, characterized in that: The outer surface of the fan shaft is provided with a keyway along the axial direction, and a single key is provided in the central hole of the fan. The single key and the keyway are used to connect and fix the fan and the fan shaft. The fan shaft has an external thread on the side away from the central gear shaft, and a round nut is located on the outside of the fan and screwed onto the fan shaft to lock the fan in place. A retaining washer is provided between the round nut and the fan.

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