Novel electric retractable undercarriage mechanism

Abstract

The utility model relates to the technical field of aircraft landing gears, and discloses a novel electric landing gear folding and unfolding mechanism which comprises a shell and a landing gear rotationally mounted in the shell, a transmission mechanism for driving the landing gear to rotate is mounted in the shell, a bottom plate is further mounted in the shell, a mounting frame is mounted on the bottom plate, and the mounting frame is mounted on the shell. The bottom of the undercarriage is connected with an undercarriage rotating piece rotationally arranged in the mounting frame, through transmission fit of a worm gear and a worm and a gear set, it is guaranteed that the size of a gearbox is reduced to the maximum extent, the undercarriage is more compact in structure arrangement and more stable in connection, and then the structural strength of the undercarriage is enhanced; the locking block is matched with the inclined planes on the undercarriage rotating piece, and under the action of the tensioning force of the reset elastic piece, the two inclined planes are kept tightly attached, so that no gap exists between the undercarriage rotating piece and the upper cover as well as between the undercarriage rotating piece and the locking block, the undercarriage cannot shake, and no gap exists after the undercarriage is used for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft landing gear, specifically to a novel electric retractable landing gear mechanism. BACKGROUND

[0002] With the progress of science and technology, people's living standards continue to improve, and the demand for quality of life is also increasing; To enrich daily life, more and more people are willing to spend time, money and effort on their hobbies, most of which have a deep interest in various aircraft around the world, but the conditions for on-site observation and experience of various real machines are very limited, therefore, various simulation model aircraft have become the object of collection and appreciation for people, which provides a broad market for various simulation model toys, and simulation model aircraft gradually penetrate into the lives of the majority of enthusiasts. Consumers' requirements for simulation model aircraft are also getting higher and higher, and the current model aircraft is required to be as realistic as possible in terms of appearance and layout. Landing gear is an indispensable accessory on model aircraft, and it is not easy to use a landing gear that can be retracted and extended on a model aircraft like a real aircraft. Currently, there are two types of retractable landing gear used on existing model aircraft, the first is a steering machine stretching type retractable landing gear, which provides power through the stretching of steel wire to realize the retraction and extension of the landing gear. Its structure is simple, but since it can only be retracted and extended by stretching the steel wire, the steel wire is long and difficult to install, and the internal structure of the model aircraft needs to be adjusted for the steel wire, resulting in a large overall volume. The existing other retractable landing gear is a pneumatic retractable landing gear, which uses a gas cylinder (or gas cylinder) to transfer power through various gas valve controls to realize the retraction and extension of the landing gear. Therefore, the pneumatic retractable landing gear must carry a gas cylinder (or gas cylinder) and various switches on the model aircraft, which results in more accessories, making installation and use inconvenient, increasing the overall weight of the model aircraft, and reducing safety. If the gas cylinder (or gas cylinder) and the gas valve leak, the model aircraft cannot provide power to extend the landing gear when landing, resulting in direct landing of the model aircraft, which can cause serious damage to the model aircraft or even scrap.

[0003] The current landing gear has the following defects:

[0004] 1. The thickness of the aircraft landing gear is relatively thick, and the installation of some aircraft landing gears on the wings results in a relatively thick wing, increasing the weight of the aircraft;

[0005] 2. The processing precision of the aircraft landing gear is high, and slight size deviation will cause the landing gear to loosen;

[0006] 3. After a long time, the landing gear is used, the gap between the landing gear rotating part and the limiting structure is easy to produce, the landing gear is shaken;

[0007] Therefore, we need to propose a new electric retractable landing gear mechanism, high structural strength, low processing precision requirement, strong stability. The utility model discloses a novel electric retractable landing gear mechanism

[0008] The utility model discloses a novel electric retractable landing gear mechanism, through the transmission cooperation of worm and gear and gear set, guarantee maximum limit reduces the size of the size of the tooth box, makes landing gear structure arrangement more compact, and the connection is more stable, and then strengthens the structural strength of landing gear, through the cooperation of locking block and the inclined surface on landing gear rotating part, and under the tension of reset elastic part, two inclined surfaces keep close, guarantee that landing gear rotating part and upper cover, locking block do not have the gap, and landing gear does not shake, and landing gear still does not appear the gap after a long time, to solve the problem in the background art.

[0009] In order to achieve the above object, the utility model provides the following technical scheme: a novel electric retractable landing gear mechanism, including shell, rotating installation landing gear in the inside of shell, the inside of shell is installed with transmission mechanism of driving landing gear rotation, the inside of shell is installed with bottom plate still, install the mounting bracket on the bottom plate, the bottom of landing gear is connected with landing gear rotating part that rotates setting in the inside of mounting bracket, locking block is slidably installed on the bottom plate, the bottom of landing gear rotating part and the top of locking block all are provided with inclined surface, two the inclined surface is closely attached, the inside of shell is provided with rudder machine unlocking mechanism of driving locking block movement still.

[0010] Preferably, the transmission mechanism includes a gearbox fixed in the inside of the shell, a second motor is fixedly arranged in the inside of the gearbox, and a worm is connected to the output shaft of the second motor.

[0011] Preferably, the inside of the gearbox is also provided with a rotatably arranged worm gear and a gear transmission assembly, and the worm gear and the gear transmission assembly are arranged in cooperation.

[0012] Preferably, the landing gear rotating part includes a rotating seat and a rotating shaft penetrating and connected to the rotating seat, one of the gear rings in the gear transmission assembly is inserted with a connecting piece, and one end of the rotating shaft is inserted and fixed in the inside of the connecting piece.

[0013] Preferably, the mounting bracket is fixed with an upper cover through bolts, a bearing is installed in the circular gap between the mounting bracket and the upper cover, and the outer wall of the rotating shaft is inserted and fixed in the inner ring of the bearing.

[0014] Preferably, a limiting groove is provided at the lower end of the inner wall of the mounting bracket, and stepped grooves are provided at both ends of the locking block, with both ends of the locking block slidably disposed inside the limiting groove.

[0015] Preferably, one end of the mounting bracket is connected to a hook, and a reset elastic element is connected to the hook. One end of the reset elastic element is connected to one end of the locking block.

[0016] Preferably, the outer casing has a through hole, the servo unlocking mechanism is installed inside the through hole, the servo unlocking mechanism includes a rotating block rotatably disposed inside the through hole, and a steel wire rope is connected between the other end of the rotating block and the locking block.

[0017] Preferably, the servo unlocking mechanism further includes a first motor mounted on the bottom of the housing, the output shaft of the first motor being connected to the rotating block.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model uses the transmission cooperation of worm gear and gear set to ensure that the size of the gear box is minimized, so that the landing gear structure is more compact, the connection is more stable, the landing gear is more stable, and thus the structural strength of the landing gear is strengthened.

[0020] 2. This utility model uses the cooperation between the locking block and the inclined surface on the landing gear rotating part, and under the tension of the reset elastic element, the two inclined surfaces remain in close contact, ensuring that there is no gap between the landing gear rotating part and the upper cover and the locking block, so that the landing gear will not shake, and the landing gear will not have gaps after long-term use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the landing gear in the retracted state of this utility model;

[0022] Figure 2 This is a schematic diagram of the landing gear in the open state of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 4 This is another perspective view of the internal structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the servo motor unlocking mechanism, transmission mechanism, locking block, and reset elastic element of this utility model;

[0026] Figure 6 This is a structural schematic diagram of the servo unlocking mechanism, transmission mechanism, landing gear, and locking block of this utility model;

[0027] Figure 7 This is a schematic diagram of the assembly of the transmission mechanism and the landing gear rotating component of this utility model.

[0028] Figure 8 This is a schematic diagram of the mounting bracket, hook, and limiting groove of this utility model;

[0029] Figure 9 This is a schematic diagram showing the landing gear rotating component and locking block when the landing gear of this utility model is opened.

[0030] Figure 10 This is a schematic diagram of the landing gear rotating component and locking block when the landing gear is retracted according to this utility model.

[0031] In the diagram: 1. Outer shell; 2. Servo unlocking mechanism; 21. Plastic plate; 22. First motor; 23. Rotating block; 24. Steel wire rope; 3. Transmission mechanism; 31. Gearbox; 32. Second motor; 33. Worm gear; 34. Worm wheel; 35. Gear transmission assembly; 36. Connecting part; 4. Landing gear; 41. Landing gear rotating part; 411. Rotating seat; 412. Rotating shaft; 5. Top cover; 6. Locking block; 7. Base plate; 70. Mounting bracket; 71. Hook; 72. Limiting groove; 8. Reset elastic element; 9. Inclined surface. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1-10 This utility model provides a technical solution: a novel electric retractable landing gear mechanism, including a housing 1 and a landing gear 4 rotatably mounted inside the housing 1. Specifically, the housing 1 has a receiving cavity inside, and the landing gear 4 is rotatably mounted in the receiving cavity of the housing. The retraction and extension of the landing gear are realized by rotating the landing gear 4. The landing gear 4 includes a wheel and a shock absorber for controlling the extension and retraction of the wheel.

[0034] The outer shell 1 houses a transmission mechanism 3 that drives the landing gear 4 to rotate. The outer shell 1 also houses a base plate 7 with a mounting bracket 70. The bottom of the landing gear 4 is connected to a landing gear rotating component 41 that is rotatably installed inside the mounting bracket 70. A locking block 6 is slidably installed on the base plate 7. Both the bottom of the landing gear rotating component 41 and the top of the locking block 6 are provided with inclined surfaces 9. The two inclined surfaces 9 fit tightly together to ensure that the landing gear rotating component 41 will not rotate after being opened. The outer shell 1 also houses a servo unlocking mechanism 2 that drives the locking block 6 to move.

[0035] When retracting the landing gear, the servo unlocking mechanism 2 pulls the locking block 6 to move to the right (away from the direction of the landing gear rotating part 41), canceling the limit on the landing gear rotating part 41, and then drives the landing gear rotating part 41 to rotate through the transmission mechanism 3 to complete the retraction of the landing gear.

[0036] Similarly, when the landing gear is lowered, the transmission mechanism 3 drives the landing gear rotating component 41 to reverse and makes the landing gear rotating component 41 abut against the upper cover 5, which can ensure that the landing gear rotating component 41 will not rotate counterclockwise after being lowered. Through the cooperation of the locking block 6 and the upper cover 5, the landing gear rotating component 41 is positioned so that it will not wobble. Under the pulling force of the reset elastic component 8, the locking block 6 springs back to the locked position, so that the landing gear rotating component 41 and the inclined surface 9 on the locking block 6 are pressed together, thus achieving the positioning of the landing gear.

[0037] The transmission mechanism 3 includes a gearbox 31 fixed inside the housing 1. A second motor 32 is fixedly installed inside the gearbox 31, and a worm gear 33 is connected to the output shaft of the second motor 32.

[0038] The inside of the gearbox 31 is also equipped with a rotating worm gear 34 and a gear transmission assembly 35, which are configured to work together.

[0039] like Figures 3-4 As shown, the gear transmission assembly 35 includes multiple gears, and the gearbox 31 has multiple rotating rods rotatably arranged inside. Each rotating rod has one or two gears sleeved on its outer wall, and the two gears on the same rotating rod have different diameters (i.e., one large gear and one small gear).

[0040] Furthermore, a worm gear 34 and a small gear are sleeved on one of the rotating rods, and the large gear and the small gear in the gear transmission assembly 35 mesh together.

[0041] The landing gear rotating component 41 includes a rotating base 411 and a rotating shaft 412 that passes through and is connected to the rotating base. One of the gears in the gear transmission assembly 35 has a connector 36 inserted into its inner ring, and one end of the rotating shaft is inserted into and fixed inside the connector 36. The transmission mechanism 3 drives the rotating shaft 412 to rotate, thereby driving the rotating base 411 fixed to the rotating shaft 412 to rotate.

[0042] Specifically, connector 36 is mounted on the large gear furthest from the second motor 32.

[0043] like Figure 5 As shown, a top cover 5 is fixed to the mounting bracket 70 by bolts. A bearing is installed in the circular gap between the mounting bracket 70 and the top cover 5. The outer wall of the rotating shaft is inserted and fixed to the inner ring of the bearing.

[0044] The lower end of the inner wall of the mounting bracket 70 is provided with a limiting groove 72, and the two ends of the locking block 6 are provided with stepped grooves. The two ends of the locking block 6 are slidably disposed inside the limiting groove 72.

[0045] One end of the mounting bracket 70 is connected to a hook 71, and a reset elastic element 8 is connected to the hook 71. One end of the reset elastic element 8 is connected to one end of the locking block 6. In this embodiment, the reset elastic element 8 is a spring.

[0046] The outer casing 1 has a through hole, and the servo unlocking mechanism 2 is installed inside the through hole. The servo unlocking mechanism 2 includes a rotating block 23 that is rotatably installed inside the through hole. A steel wire rope 24 is connected between the rotating block 23 and the other end of the locking block 6.

[0047] One end of the locking block 6 is provided with a hanging ear, one end of the reset elastic element 8 is connected to the hanging ear, and the other end of the locking block 6 is provided with a hanging ring, one end of the wire rope 24 is connected to the hanging ring.

[0048] The first motor 22 drives the rotating block 23 to rotate, and the rotating block 23 pulls the steel wire rope 24 to move, which in turn drives the locking block 6 to move away from the landing gear rotating component 41.

[0049] The servo unlocking mechanism 2 also includes a plastic plate 21 installed inside the housing 1 to press down the servo, and a first motor 22 installed at the bottom of the housing 1. The output shaft of the first motor 22 is connected to the rotating block 23.

[0050] Both the first motor 22 and the second motor 32 are electrically connected to the circuit board (not shown in the figure).

[0051] When in use, when it is necessary to retract the landing gear, the first motor 22 is activated. The first motor 22 drives the rotating block 23 to rotate, and the rotating block 23 pulls the steel wire rope 24 to move, which in turn drives the locking block 6 to move away from the landing gear rotating component 41, so that the locking block 6 separates from the two inclined surfaces 9 on the landing gear rotating component 41, thereby canceling the limitation on the landing gear rotating component 41.

[0052] Then the second motor 32 is activated, which drives the worm gear 33 to rotate. The worm gear 33 drives the worm wheel 34 to rotate, and the worm wheel 34 drives the landing gear rotating component 41 to rotate clockwise through the gear transmission assembly 35 and the connecting piece 36, thereby driving the landing gear 4 to rotate and retract the landing gear 4. After the landing gear is retracted, the gearbox 31 stalls, the current increases, and the circuit board detects that the current has reached a certain value and cuts off the power to the gearbox 31.

[0053] When the landing gear needs to be opened, the second motor 32 runs and reverses. With the cooperation of the worm gear 33, worm wheel 34, gear transmission assembly 35, and connecting piece 36, it drives the landing gear rotating part 41 to rotate, causing the landing gear 4 to move out of the outer shell 1. The landing gear rotating part 41 abuts against the upper cover 5. After being lowered into place, the gearbox 31 stalls, the current increases, and the circuit board detects that the current has reached a certain value and cuts off the power to the gearbox 31. Under the elastic pull of the reset elastic member 8, the locking block 6 automatically springs into the locking position, so that the locking block 6 is tightly attached to the two inclined surfaces 9 on the landing gear rotating part 41, realizing the positioning of the landing gear rotating part 41, ensuring its stability during use, and preventing it from shaking.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel electric retractable landing gear mechanism, comprising a housing (1) and a landing gear (4), the landing gear (4) being rotatably arranged in a receiving cavity of the housing (1), a transmission mechanism (3) for driving the landing gear (4) to open or retract being mounted in the housing (1), characterized in that: The inside of the shell (1) is further provided with a bottom plate (7), the bottom plate (7) is provided with a mounting frame (70), the bottom of the landing gear (4) is connected with a landing gear rotating part (41) which is rotatably arranged in the mounting frame (70), the bottom plate (7) is slidably provided with a locking block (6), the bottom of the landing gear rotating part (41) and the top of the locking block (6) are provided with inclined surfaces (9), the two inclined surfaces (9) are closely attached, and the inside of the shell (1) is further provided with a rudder unlocking mechanism (2) for driving the locking block (6) to move.

2. A new electrically motorized retractable landing gear mechanism according to claim 1 characterized in that: The transmission mechanism (3) comprises a gear box (31) fixed in the shell (1), and the inside of the gear box (31) is fixedly provided with a second motor (32), and the output shaft of the second motor (32) is connected with a worm (33).

3. A new electrically motorized retractable landing gear mechanism according to claim 2 characterized in that: The inside of the gear box (31) is further provided with a rotatably arranged worm wheel (34) and a gear transmission assembly (35), and the worm wheel (34) and the gear transmission assembly (35) are cooperatively arranged.

4. A new electrically motorized retractable landing gear mechanism according to claim 3 characterized in that: The landing gear rotating part (41) comprises a rotating seat (411) and a rotating shaft (412) penetrating and connected to the rotating seat, one of the inner rings of the gear transmission assembly (35) is inserted with a connecting piece (36), and one end of the rotating shaft (412) is inserted and fixed in the inside of the connecting piece (36).

5. A new electrically motorized retractable landing gear mechanism according to claim 4 characterized in that: The mounting frame (70) is fixedly provided with an upper cover (5) through bolts, a bearing is arranged in the circular gap between the mounting frame (70) and the upper cover (5), and the outer wall of the rotating shaft is inserted and fixed in the inner ring of the bearing.

6. A new electrically motorized retractable landing gear mechanism according to claim 5 characterized in that: The inside of the mounting frame (70) is provided with a limiting groove (72) at the lower end of the inner wall, the both ends of the locking block (6) are provided with stepped grooves, and the both ends of the locking block (6) are slidably arranged in the inside of the limiting groove (72).

7. A new electrically motorized retractable landing gear mechanism according to claim 6 characterized by: One end of the mounting frame (70) is connected with a hook (71), the hook (71) is connected with a reset elastic member (8), and one end of the reset elastic member (8) is connected to one end of the locking block (6).

8. A new electrically motorized retractable landing gear mechanism according to claim 7 characterized by: A through hole is formed in the shell (1), the rudder unlocking mechanism (2) is arranged in the inside of the through hole, the rudder unlocking mechanism (2) comprises a rotating block (23) rotatably arranged in the inside of the through hole, and the rotating block (23) and the other end of the locking block (6) are connected with a steel wire rope (24).

9. A new electrically motorized retractable landing gear mechanism according to claim 8 characterized in that: The rudder unlocking mechanism (2) further comprises a first motor (22) arranged at the bottom of the shell (1), and the output shaft of the first motor (22) is connected with the rotating block (23).

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