Miniature retractable landing gear

Abstract

The utility model relates to the technical field of model airplanes, in particular to a miniature retractable landing gear which comprises a fixing frame body. A driving assembly mounting cavity and a control assembly mounting cavity are transversely and sequentially formed in the fixing frame main body; the control assembly comprises a rotating piece rotationally arranged in the control assembly mounting cavity and a control piece arranged on the periphery of the rotating piece in a sleeving mode, and the control piece is connected with a spiral pair of the rotating piece; the control end of the undercarriage is rotatably connected with the control assembly mounting cavity, a guide groove is formed in the end head of the control end of the undercarriage, and the guide groove is matched with the control piece capable of sliding on the rotating piece so as to drive the undercarriage to rotate around the control end; and the driving assembly is arranged in the driving assembly mounting cavity and is fixedly connected with the rotating piece. By means of the structure, the fixing frame body can be designed to be ultrathin (7.7 mm thick), and the fixing frame can be suitable for model airplanes within 400 g.

Description

Technical Field

[0001] This utility model relates to the field of model aircraft technology, and in particular to a miniature retractable landing gear. Background Technology

[0002] Early model aircraft landing gear was mostly fixed and simple in structure (such as wooden or metal frames), but it had high air resistance, affecting flight performance. As model aircraft have developed towards high simulation, racing, and long endurance, retractable landing gear has gradually become more common.

[0003] However, the retractable landing gear used in large model airplanes is bulky and heavy, making it unsuitable for small model airplanes. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a miniature retractable landing gear, comprising:

[0005] The main body of the mounting frame is symmetrically arranged at the bottom of the small model aircraft; the interior of the main body of the mounting frame is provided with a drive component mounting cavity and a control component mounting cavity in a transverse order.

[0006] The control assembly includes a rotating component rotatably disposed in the mounting cavity of the control assembly, and a control component sleeved around the rotating component, wherein the control component is connected to the rotating component via a helical pair;

[0007] The landing gear has a control end that is rotatably connected to the control component mounting cavity. The end of the control end of the landing gear is provided with a guide groove. The guide groove cooperates with the control component that can slide on the rotating component to drive the landing gear to rotate around the control end.

[0008] A drive assembly is configured in the drive assembly mounting cavity and fixedly connected to the rotating member.

[0009] Furthermore, the control component mounting cavity of the main body of the fixing frame is provided with a guide groove for assisting the sliding of the control component.

[0010] Furthermore, the rotating component is a lead screw, the controlling component is a slider, the inner cavity of the slider is threadedly engaged with the lead screw, and the two vertical sidewalls of the slider that are not connected to the lead screw are provided with guide platforms. The guide platforms, the lead screw and the guide groove cooperate with each other to drive the slider to move back and forth in a straight line along the guide groove.

[0011] The two vertical sidewalls where the slider connects to the lead screw are provided with conductive copper plates.

[0012] Furthermore, the drive assembly includes a motor, a drive wheel fixedly connected to the drive shaft of the motor, a second driven wheel meshing with the drive wheel, a third driven wheel meshing with the second driven wheel, and the third driven wheel fixedly connected to the rotating component;

[0013] The second driven gear is a double gear, with the larger gear in the second driven gear meshing with the driving gear, and the smaller gear in the second driven gear meshing with the third driven gear.

[0014] Furthermore, the landing gear includes a wire wheel and a steering component located at the drive end of the wire wheel. The steering component includes steering plates fixedly located at both ends of the drive end. The end of the steering plate that is connected to the drive end is rotatably connected to the main body of the fixed frame via a steel shaft. The end of the steering plate that is not connected to the drive end is recessed inward toward the drive end to form a guide groove that cooperates with the guide platform.

[0015] Furthermore, the thickness of the main body of the fixing frame is 7.7mm.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model discloses a miniature retractable landing gear that uses a motor to drive a gear, which in turn drives a lead screw, which in turn drives a slider, which in turn drives a rotating component to change its angle, thereby enabling the aircraft wheels to open and retract. With this structure, the main body of the mounting frame of this utility model can achieve an ultra-thin design (7.7mm thick), making it suitable for model aircraft weighing less than 400g. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is an exploded view of a miniature retractable landing gear according to the present invention.

[0020] Figure 2 This is a schematic diagram of the miniature retractable landing gear of this utility model being opened on a model airplane;

[0021] Figure 3 This is a schematic diagram of a miniature retractable landing gear retracting on a model aircraft according to the present invention;

[0022] Figure 4 This is a detailed view of the opening of a miniature retractable landing gear according to the present invention, wherein (a) is a schematic diagram, (b) is a side view, and (c) is a bottom view;

[0023] Figure 5 This is a detailed view of the retracted miniature retractable landing gear of this utility model, wherein (a) is a top view and (b) is a side view;

[0024] Figure 6 This is a schematic diagram of a multi-gear structure for a miniature retractable landing gear according to the present invention.

[0025] Figure Labels

[0026] 1: Main body of the mounting frame;

[0027] 11: Drive component mounting cavity; 12: Control component mounting cavity; 13: Guide groove;

[0028] 2: Control components;

[0029] 21: Rotating component; 22: Control component; 23: Copper sheet with wire; 24: Conducting copper sheet; 25: Copper bushing; 26: Guide table;

[0030] 3: Landing gear;

[0031] 31: Wire wheel; 32: Steering component; 33: Steel axle;

[0032] 321: Steering plate; 322: Guide groove;

[0033] 4: Driver components;

[0034] 41: Motor; 42: Drive wheel; 43: Second driven wheel; 44: Third driven wheel. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model.

[0036] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0037] First Embodiment

[0038] Please see Figure 1-6 As shown, the technical solution for a miniature retractable landing gear provided in this embodiment includes the following:

[0039] The two main mounting frames 1 are symmetrically arranged at the bottom of the small model aircraft; the interior of each main mounting frame 1 is provided with a drive component mounting cavity 11 and a control component mounting cavity 12 arranged horizontally in sequence.

[0040] Control component 2 includes a rotating component 21 rotatably disposed in the control component mounting cavity 12, and a control component 22 sleeved around the rotating component 21, wherein the control component 22 is connected to the rotating component 21 by a helical pair;

[0041] The landing gear 3 has a control end that is rotatably connected to the control component mounting cavity 12. The end of the control end of the landing gear 3 is provided with a guide groove 322. The guide groove 322 cooperates with the control component 22 that can slide on the rotating component 21 to drive the landing gear 3 to rotate around the control end.

[0042] The drive assembly 4 is configured in the drive assembly mounting cavity 11 and is fixedly connected to the rotating member 21.

[0043] In specific implementation, as shown in the appendix Figure 1 The left side of the cavity in the middle of the fixed frame body 1 is the drive component mounting cavity 11, and the right side is the control component mounting cavity 12. The transverse hollow grooves in the corresponding areas of the fixed frame body 1 and the control component mounting cavity 12 are guide grooves 13. The guide grooves 13 are used to limit and assist the sliding of the control component 22.

[0044] Specifically, the rotating component 21 is a lead screw, which contacts the wired copper sheet 23 in the control component mounting cavity 12 of the fixed frame body 1. The lead screw is also provided with a copper bushing 25. The control component 22 is a slider, and the inner cavity of the slider is threadedly engaged with the lead screw. The two vertical sidewalls of the slider that are not connected to the lead screw are each provided with a guide platform 26. The guide platform 26, the lead screw, and the guide groove 13 cooperate with each other to drive the slider to move back and forth in a straight line along the guide groove 13.

[0045] The two vertical sidewalls where the slider connects to the lead screw are each provided with conductive copper plates 24.

[0046] Specifically, the drive assembly 4 includes a motor 41, a drive wheel 42 fixedly connected to the drive shaft of the motor 41, a second driven wheel 43 meshing with the drive wheel 42, and a third driven wheel 44 meshing with the second driven wheel 43. The third driven wheel 44 is fixedly connected to the rotating member 21.

[0047] The second driven gear 43 is a double gear. The large gear in the second driven gear 43 meshes with the driving gear 42, and the small gear in the second driven gear 43 meshes with the third driven gear 44.

[0048] In practice, motor 41 drives drive wheel 42 to rotate, drive wheel 42 to rotate, drive wheel 43 to rotate, drive wheel 43 to rotate, drive wheel 44 to rotate, and the rotating wheel 44 drives the lead screw fixedly connected to it to rotate.

[0049] In practical implementation, increasing the number of gears and changing the gear ratio can achieve greater torque and slower speed, thus achieving better simulation results. Figure 6 For example, attached Figure 6 It includes a driving wheel 42, two secondary driven wheels 43, and a tertiary driven wheel 44. The motor 41 drives the driving wheel 42 to rotate, and the rotation of the driving wheel 42 drives the auxiliary wheel 44. Figure 6 The upper driven wheel 43 rotates, thereby driving the attached wheel... Figure 6 The lower driven wheel 43 rotates, which in turn drives the third driven wheel 44 to rotate, thereby driving the lead screw fixedly connected to it to rotate. This invention does not limit the specific number of gears; any other number of gears is within the protection scope of this invention.

[0050] Specifically, the landing gear 3 includes a wire wheel 31 and a steering component 32 disposed at the drive end of the wire wheel 31. The steering component 32 includes steering plates 321 fixedly disposed at both ends of the drive end. The end of the steering plate 321 connected to the drive end is rotatably connected to the fixed frame body 1 through a steel shaft 33. The end of the steering plate 321 not connected to the drive end is recessed inward toward the drive end to form a guide groove 322 that cooperates with the guide platform 26.

[0051] In specific implementation, the steering plate 321 includes an abutment surface parallel to the central axis of the wire shaft of the wire wheel 31, i.e., an attached surface. Figure 1 The upper end face of the steering plate 321 is the contact surface, and the steering component 32 and the central axis of the wire shaft of the wire wheel 31 are inclined at a certain angle (such as 45°, which can be designed as needed).

[0052] Specifically, the thickness of the main body 1 of the fixing frame is 7.7mm.

[0053] The working principle or process of the miniature retractable landing gear provided by this utility model is as follows: When the wire wheel 31 needs to be opened, the motor 41 rotates in the forward direction, thereby driving the lead screw to rotate through three gear transmissions. The slider that is threaded with the lead screw moves along the guide groove 322 towards the attached... Figure 1Sliding to the left, the guide platform 26 on the slider applies a leftward driving force to the guide groove 322 on the steering component 32, causing the wire wheel 31 to move clockwise around the steel shaft 33, and the opening is completed when the contact surface touches the main body 1 of the fixed frame.

[0054] When it is necessary to close the wire wheel 31, the motor 41 rotates in the reverse direction to drive the lead screw to rotate through three gears. The slider, which is threaded with the lead screw, moves along the guide groove 322 towards the attached... Figure 1 Sliding to the right, the guide platform 26 on the slider applies a rightward driving force to the guide groove 322 on the steering component 32, causing the wire wheel 31 to move counterclockwise around the steel shaft 33. When the central axis of the wire shaft of the wire wheel 31 is parallel to the upper end face of the fixed frame body 1, the closing is completed.

[0055] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A micro-lay-flat landing gear characterized in that, The utility model relates to a kind of fixed frame, including: Fixed frame body, two the fixed frame body symmetry is equipped at small-scale model bottom;The fixed frame body inside transversely is equipped with drive assembly installation cavity and control component installation cavity in turn; Control component, including rotatable in the control component installation cavity Rotating part, control piece is set on the periphery of the rotating part, the control piece and the rotating part screw pair are connected; Landing gear, the control end of the landing gear is rotatably connected with the control component installation cavity, a guide groove is arranged at the end of the control end of the landing gear, and the control piece is slidably connected on the rotating part to drive the landing gear to rotate around the control end; Drive assembly, configured in the drive assembly installation cavity and fixedly connected with the rotating part.

2. The micro landing gear of claim 1, wherein: The control component installation cavity of the fixed frame body is provided with a guide sliding groove for assisting the sliding of the control piece.

3. The micro landing gear of claim 2, wherein: The rotating part is a lead screw, and the control piece is a sliding block, the inner cavity of the sliding block is threadedly connected with the lead screw, and the two vertical side walls of the sliding block not connected with the lead screw are provided with guide platforms, the guide platforms, the lead screw and the guide sliding groove are matched to drive the sliding block to move linearly along the guide sliding groove. The two vertical side walls of the sliding block connected with the lead screw are provided with a through copper sheet.

4. The micro landing gear of claim 2, wherein: The drive assembly includes a motor, a driving wheel fixedly connected with the drive shaft of the motor, a second driven wheel meshingly connected with the driving wheel, and a third driven wheel meshingly connected with the second driven wheel, and the third driven wheel is fixedly connected with the rotating part. The second driven wheel is a double gear, the large gear in the second driven wheel is meshed with the driving wheel, and the small gear in the second driven wheel is meshed with the third driven wheel.

5. The micro landing gear of claim 3, wherein: The landing gear includes a steel wire wheel and a steering piece arranged at the driving end of the steel wire wheel, the steering piece includes steering pieces fixedly arranged at both ends of the driving end, one end of the steering piece connected with the driving end is rotatably connected with the fixed frame body through a steel shaft, and the other end of the steering piece not connected with the driving end is inwardly recessed to form a guide groove matched with the guide platform.

6. The micro landing gear of claim 1, wherein: The thickness of the fixed frame body is 7.7 mm.

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