UAV landing gear retraction mechanism

Abstract

The embodiment of the present invention discloses a retractable mechanism for a drone landing gear, which comprises: a mounting frame, a retractable shaft, a worm mounting seat, a worm, a worm wheel, a rocker arm, and a wheel; wherein the retractable shaft is arranged in the mounting frame and can rotate relative to the mounting frame, the worm mounting seat is arranged at the top of the mounting frame, the worm is arranged in the worm mounting seat, the worm wheel is sleeved on the retractable shaft, the worm wheel is meshed with the worm, one end of the rocker arm is connected to the retractable shaft, and the other end is connected to the wheel. The drone landing gear retractable mechanism requires a small installation space and has a high reduction ratio.

Description

Technical Field

[0001] The present invention relates to the field of aircraft, and in particular to a landing gear retracting and extending mechanism for a drone. Background Art

[0002] At present, the landing gear of (small) UAVs adopts two structures, namely, push rod transmission mechanism and gear transmission mechanism, to realize the retraction and extension of the landing gear cover. In use, the above two mechanisms have the following shortcomings: 1. They are not easy to arrange in aircraft with narrow space; 2. Because the above two mechanisms have relatively low deceleration ratio under the same space conditions, it is necessary to select a servo drive motor with higher power to meet the design requirements, which increases the cost.

[0003] Therefore, it is necessary to develop a UAV landing gear retraction and extension mechanism that reduces the space required for installation and has a high reduction ratio.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a UAV landing gear retracting and extending mechanism, which requires a small installation space and has a high reduction ratio.

[0006] In order to achieve the above-mentioned object, a UAV landing gear retracting and extending mechanism is provided according to the present invention, and the UAV landing gear retracting and extending mechanism comprises: a mounting frame, a retracting and extending rotating shaft, a worm mounting seat, a worm, a worm wheel, a rocker arm, and a machine wheel;

[0007] Among them, the retractable shaft passes through the mounting frame and can rotate relative to the mounting frame, the worm mounting seat is arranged on the top of the mounting frame, the worm is arranged in the worm mounting seat, the worm wheel is sleeved on the retractable shaft, the worm wheel is engaged with the worm, one end of the rocker arm is connected to the retractable shaft, and the other end is connected to the machine wheel.

[0008] Preferably, the retractable and extending mechanism of the landing gear of the UAV further comprises a retractable and extending rotating shaft support bearing, wherein the retractable and extending rotating shaft support bearing is arranged on the mounting frame, and the retractable and extending rotating shaft is connected to the retractable and extending rotating shaft support bearing.

[0009] Preferably, the UAV landing gear retracting and extending mechanism further comprises a worm support bearing, wherein the worm support bearing is arranged on the worm mounting seat, and the worm is connected to the worm support bearing.

[0010] Preferably, the UAV landing gear retraction mechanism also includes a servo drive motor and a transmission gear set, the output end of the servo drive motor is connected to the input gear of the transmission gear set, the transmission gear set is arranged on one side of the worm mounting seat, and the output gear of the transmission gear set is sleeved on the worm.

[0011] Preferably, the worm mounting seat is connected to the mounting frame via screws, and the screws are sleeved with adjusting springs.

[0012] Preferably, the UAV landing gear retracting and extending mechanism further includes a shock absorber, and the wheel is connected to one end of the rocker arm via the shock absorber.

[0013] Beneficial effects:

[0014] 1) The UAV landing gear retracting and extending mechanism provided by the present invention transmits power through the arrangement of the retracting and extending rotating shaft, the worm and the worm gear, and can drive the rocker arm to swing by driving the worm to rotate. The installation space required for the retracting and extending rotating shaft, the worm and the worm gear is small. The arrangement of the mounting frame and the worm mounting seat makes the structure of the UAV landing gear retracting and extending mechanism more compact, further reducing the installation space required for the UAV landing gear retracting and extending mechanism, facilitating the installation and disassembly of the UAV landing gear retracting and extending mechanism, and improving the space utilization rate of the UAV.

[0015] 2) Through the worm and worm wheel, the rotation of the worm can drive the rocker arm to rotate through the worm wheel, thereby realizing the retraction and extension of the machine wheel and improving the reduction ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic structural diagram of a UAV landing gear retracting and extending mechanism according to an embodiment of the present invention.

[0017] Figure 2 It is a partial enlarged view of the retractable and extending mechanism of the landing gear of a UAV according to an embodiment of the present invention.

[0018] Description of reference numerals:

[0019] 1. Retractable rotating shaft; 2. Retractable rotating shaft supporting bearing; 3. Mounting frame; 4. Worm supporting bearing; 5. Worm; 6. Worm mounting seat; 7. Servo drive motor; 8. Transmission gear set; 9. Adjustment spring; 10. Worm wheel; 11. Rocker arm; 12. Shock absorber; 13. Machine wheel. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0021] According to one aspect of the present invention, a UAV landing gear retracting and extending mechanism is provided, and the UAV landing gear retracting and extending mechanism comprises: a mounting frame, a retracting and extending rotating shaft, a worm mounting seat, a worm, a worm wheel, a rocker arm, and a machine wheel;

[0022] Among them, the retractable shaft passes through the mounting frame and can rotate relative to the mounting frame, the worm mounting seat is arranged on the top of the mounting frame, the worm is arranged in the worm mounting seat, the worm wheel is sleeved on the retractable shaft, the worm wheel is engaged with the worm, one end of the rocker arm is connected to the retractable shaft, and the other end is connected to the machine wheel.

[0023] During use, the drone landing gear retracting and extending mechanism of the present invention is installed on the drone, and the worm is driven to rotate by the driving device, so that the worm can drive the worm wheel to rotate, and further drive the retracting and extending rotating shaft to rotate. The rocker arm can drive the wheel to be retracted or extended through the rotation of the retracting and extending rotating shaft, thereby realizing the retraction and extension of the drone landing gear.

[0024] The UAV landing gear retracting and extending mechanism provided by the present invention transmits power through the arrangement of the retracting and extending rotating shaft, the worm and the worm wheel, and can drive the rocker arm to swing by driving the worm to rotate. The installation space required for the retracting and extending rotating shaft, the worm and the worm wheel is small. The arrangement of the installation frame and the worm mounting seat makes the structure of the UAV landing gear retracting and extending mechanism more compact, further reducing the installation space required for the UAV landing gear retracting and extending mechanism, facilitating the installation and disassembly of the UAV landing gear retracting and extending mechanism, and improving the space utilization rate of the UAV.

[0025] The present invention uses a worm and a worm wheel, and the rotation of the worm can drive the rocker arm to rotate through the worm wheel, so that the machine wheel can be retracted and extended, thereby improving the reduction ratio.

[0026] As a preferred solution, the retractable and extending mechanism of the UAV landing gear further includes a retractable and extending shaft support bearing, wherein the retractable and extending shaft support bearing is arranged on the mounting frame, and the retractable and extending shaft is connected to the retractable and extending shaft support bearing.

[0027] In this technical solution, a retractable shaft support bearing is further provided to facilitate the rotation of the retractable shaft relative to the mounting frame, thereby facilitating the installation and storage of the retractable shaft.

[0028] As a preferred solution, the UAV landing gear retracting and extending mechanism further includes a worm support bearing, wherein the worm support bearing is arranged on the worm mounting seat, and the worm is connected to the worm support bearing.

[0029] In this technical solution, a worm support bearing is further included to facilitate the rotation of the worm relative to the worm mounting seat and the installation of the worm.

[0030] As a preferred embodiment, the UAV landing gear retraction mechanism also includes a servo drive motor and a transmission gear set, wherein the output end of the servo drive motor is connected to the input gear of the transmission gear set, the transmission gear set is arranged on one side of the worm mounting seat, and the output gear of the transmission gear set is sleeved on the worm.

[0031] This technical solution further includes a servo drive motor and a transmission gear set. The servo drive motor is used as a power source to drive the worm to rotate through the transmission gear set. The transmission gear set is arranged on one side of the worm mounting seat, making the structure of the UAV landing gear retraction mechanism more compact and further reducing the required installation space.

[0032] As a preferred solution, the worm mounting seat is connected to the mounting frame via screws, and the screws are sleeved with adjustment springs.

[0033] In this technical solution, by adjusting the setting of the shrapnel, the meshing between the worm and the worm wheel is always in a compressed state, thereby ensuring the safety of the operation of the UAV landing gear retraction and extension mechanism.

[0034] As a preferred solution, the UAV landing gear retraction and extension mechanism also includes a shock absorber, and the wheel is connected to one end of the rocker arm through the shock absorber.

[0035] This technical solution further includes a shock absorber, so that the retracting and extending mechanism of the UAV landing gear has a shock absorbing effect during use, thereby reducing the impact force that the UAV needs to withstand.

[0036] Example 1

[0037] Figure 1 The figure is a schematic structural diagram of a UAV landing gear retracting and extending mechanism according to an embodiment of the present invention. Figure 2 It is a partial enlarged view of the retractable and extending mechanism of the landing gear of a UAV according to an embodiment of the present invention.

[0038] like Figure 1 and Figure 2 As shown, the retractable and extending mechanism of the UAV landing gear includes: a mounting frame 3, a retractable and extending rotating shaft 1, a worm mounting seat 6, a worm 5, a worm wheel 10, a rocker arm 11, and a wheel 13;

[0039] Among them, the retractable shaft 1 passes through the mounting frame 3 and can rotate relative to the mounting frame 3. The worm mounting seat 6 is set on the top of the mounting frame 3. The worm 5 is set in the worm mounting seat 6. The worm wheel 10 is sleeved on the retractable shaft 1. The worm wheel 10 is engaged with the worm 5. One end of the rocker arm 11 is connected to the retractable shaft 1, and the other end is connected to the machine wheel 13.

[0040] The retractable and extending mechanism of the UAV landing gear further includes a retractable and extending shaft support bearing 2 , wherein the retractable and extending shaft support bearing 2 is arranged on the mounting frame 3 , and the retractable and extending shaft 1 is connected to the retractable and extending shaft support bearing 2 .

[0041] The UAV landing gear retracting and extending mechanism further comprises a worm support bearing 4 , wherein the worm support bearing 4 is arranged on the worm mounting seat 6 , and the worm 5 is connected to the worm support bearing 4 .

[0042] Among them, the UAV landing gear retraction and extension mechanism also includes a servo drive motor 7 and a transmission gear set 8, the output end of the servo drive motor 7 is connected to the input gear of the transmission gear set 8, the transmission gear set 8 is arranged on one side of the worm mounting seat 6, and the output gear of the transmission gear set 8 is sleeved on the worm 5.

[0043] The worm mounting seat 6 is connected to the mounting frame 3 via screws, and an adjusting spring piece 9 is sleeved on the screws.

[0044] The UAV landing gear retracting and extending mechanism further includes a shock absorber 12 , and the wheel 13 is connected to one end of the rocker arm 11 via the shock absorber 12 .

[0045] In this embodiment, the servo drive motor 7 installed on the worm mounting seat 6 drives the transmission gear set 8 after the controller controls the power supply to be energized. The transmission gear set 8 drives the worm mounting seat 6 once to drive the worm 5 on the worm support bearing 4 to rotate around the center of the worm support bearing 4. The rotation of the worm 5 drives the worm wheel 10 to rotate around the center of the retractable shaft 1 supported by the retractable shaft support bearing 2 installed in the mounting frame 3. The rocker arm 11 fixed on the worm wheel 10 and the shock absorber 12 and the machine wheel 13 connected to the rocker arm 11 rotate around the center of the retractable shaft support bearing 2 with the worm wheel 10, and finally achieve the function of retracting and extending the landing gear. During the rotation of the worm wheel 10 around the center of the retractable shaft support bearing 2, the adjustment spring piece 9 offsets the gap generated in the meshing process of the worm 5 and the worm wheel 10 through its own elastic deformation, so that the worm 5 and the worm wheel 10 are always in a pre-tightened state during the meshing process, so as to achieve the function of stably retracting and extending the landing gear and eliminating repeated impacts and noise.

[0046] In this embodiment, since the worm wheel 10 and the worm 5 have a self-locking function, it is not necessary to design a limit mechanism and a locking mechanism when designing the landing gear, thereby simplifying the structure and reducing the cost; in this embodiment, the worm wheel 10 and worm 5 structure has a large reduction ratio, so that the corresponding servo drive motor 7 with smaller power and cost can be selected during the design and is easy to arrange in an aircraft with narrow space; at the same time, since the structure of this embodiment is provided with an adjustment spring sheet 9, the meshing moment of the worm wheel 10 and worm 5 during the retraction and extension process of the landing gear is in a compressed state, thereby eliminating repeated impacts and noise during the retraction and extension process of the landing gear.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A UAV landing gear retracting and extending mechanism, characterized in that: The retractable and extending mechanism of the UAV landing gear comprises: a mounting frame, a retractable and extending rotating shaft, a worm mounting seat, a worm, a worm wheel, a rocker arm and a wheel; The retractable shaft is arranged in the mounting frame and can rotate relative to the mounting frame. The worm mounting seat is arranged on the top of the mounting frame. The worm is arranged in the worm mounting seat. The worm wheel is sleeved on the retractable shaft. The worm wheel is meshed with the worm. One end of the rocker arm is connected to the retractable shaft, and the other end is connected to the machine wheel. A worm support bearing, wherein the worm support bearing is arranged on the worm mounting seat, and the worm is connected to the worm support bearing; A servo drive motor and a transmission gear set, wherein the output end of the servo drive motor is connected to the input gear of the transmission gear set, the transmission gear set is arranged on one side of the worm mounting seat, and the output gear of the transmission gear set is sleeved on the worm; A retractable rotating shaft support bearing, wherein the retractable rotating shaft support bearing is arranged on the mounting frame, and the retractable rotating shaft is connected to the retractable rotating shaft support bearing; A shock absorber, wherein the wheel is connected to one end of the rocker arm through the shock absorber; The worm mounting seat is connected to the mounting frame via screws, and an adjusting spring is sleeved on the screws.

Images