Unmanned helicopter, its rotor system and stop structure

Abstract

The utility model provides an unmanned helicopter and rotor system and stop structure thereof, belong to unmanned plane technical field. Stop structure includes stop lever, pivot and stop block. The end of stop lever is equipped with two interval arrangement's lug, is equipped with a mounting hole on each lug, two mounting holes are coaxial arrangement; pivot is worn in mounting hole and is fixed on lug; stop block is circular ring formula structure, can rotatably be sleeved on pivot and be located between two lugs. The utility model discloses a stop structure, and stop block can be contacted with the corresponding contact part arranged on unmanned helicopter, reaches the stop effect of rotor system. When stop block contacts the contact part, a certain amplitude rotation will occur, thereby plays certain shock attenuation and buffering effect.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to an unmanned helicopter and its rotor system and stop structure. Background Technology

[0002] The rotor system of an unmanned helicopter, as a core component, affects the overall operation of the helicopter and is a key aspect of helicopter technology. The stop block, as a crucial mechanism for limiting excessive structural movement in unmanned helicopter rotors, plays a vital role in the safe operation of unmanned helicopters. Currently, most stop structures rely on pure impact measures, which can easily damage the rotor hub structure. Utility Model Content

[0003] This invention provides an unmanned helicopter, its rotor system, and a stop structure, in order to at least partially solve the aforementioned technical problems.

[0004] As the first aspect of this utility model, a stop structure for an unmanned helicopter rotor system is provided, comprising: a stop rod, the end of which is provided with two spaced lugs, each lug having a mounting hole, the two mounting holes being coaxially arranged;

[0005] A rotating shaft passes through the mounting hole and is fixed to the lug;

[0006] The stop block is a ring-shaped structure that is rotatably fitted onto the shaft and located between two lugs.

[0007] It also includes a self-lubricating bushing disposed between the stop block and the rotating shaft, wherein the stop block is rotatable relative to the self-lubricating bushing.

[0008] The self-lubricating bushing is provided in two parts, and one end of the self-lubricating bushing has an annular flange. The annular flange is inserted into the space between the stop block and the side wall of the lug to axially limit the stop block.

[0009] The self-lubricating bushing is a brass-graphite self-lubricating bushing.

[0010] The rotating shaft is a screw.

[0011] The lug has a mounting hole for supporting the shaft, and the shaft bushing has a flange that contacts the outer side of the lug.

[0012] The shaft end is provided with a nut.

[0013] The nut is a slotted nut, and the shaft has a through hole for the cotter pin to pass through. The shaft is fitted with the cotter nut.

[0014] As a second aspect of this utility model, a rotor system for an unmanned helicopter is also provided, including the aforementioned stop structure.

[0015] As a third aspect of this utility model, an unmanned helicopter is also provided, the rotor system of which includes the aforementioned stop structure.

[0016] Based on the above solution, it can be seen that the unmanned helicopter, its rotor system, and its stop structure of this utility model have at least one of the following beneficial effects compared to the prior art:

[0017] The stop structure of this invention has a stop block that can contact a corresponding contact part on the unmanned helicopter to achieve the effect of stopping the rotor system. When the stop block contacts the contact part, it will rotate to a certain extent, thereby playing a certain role in shock absorption and buffering. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the stop structure of the rotor system of the unmanned helicopter of this utility model;

[0020] Figure 2 For this reason Figure 1 A cross-sectional view of the rotating shaft when it is cut.

[0021] Figure 3 A schematic diagram showing the contact between the stop block and the contact part.

[0022] In the above figures, the meanings of the reference numerals are as follows:

[0023] In the figure: 1. Nut; 2. First shaft bushing; 3. First self-lubricating bushing; 4. Second self-lubricating bushing; 5. Second shaft bushing; 6. Shaft; 7. Stop block; 8. Contact part; 10. Stop rod; 11. Lug. Detailed Implementation

[0024] To better understand the technical solutions of the embodiments of this utility model, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] like Figures 1 to 3As shown in the figure, this utility model embodiment discloses a stop structure for an unmanned helicopter rotor system, which includes a stop rod 10, a rotating shaft 6, and a stop block 7.

[0027] The end of the stop rod 10 is provided with two spaced lugs 11, and each lug 11 is provided with a mounting hole. The two mounting holes are coaxially arranged.

[0028] The rotating shaft 6 passes through the mounting hole and is fixed to the lug 11.

[0029] The stop block 7 has a ring-shaped structure and is rotatably fitted onto the rotating shaft 6. The stop block 7 is located between the two lugs 11.

[0030] In this embodiment, the stop structure has a stop block 7 that can contact the corresponding contact part 8 on the unmanned helicopter to achieve a stopping effect on the rotor system. Unlike the fixed block structure of existing technologies, the stop block 7 does not directly and rigidly collide with the contact part 8. Instead, when the stop block 7 contacts the contact part 8, it rotates, thus providing shock absorption and buffering. This significantly improves the service life of the stop block 7 and reduces vibration and noise.

[0031] This stop structure also includes a first self-lubricating bushing 3 and a second self-lubricating bushing 4 disposed between the stop block 7 and the rotating shaft 6. The stop block 7 is rotatable relative to the first self-lubricating bushing 3 and the second self-lubricating bushing 4. The self-lubricating bushing can reduce the friction of the stop block 7 during rotation and reduce the wear between the stop block 7 and the rotating shaft 6.

[0032] The first self-lubricating bushing 3 and the second self-lubricating bushing 4 can be selected as brass-graphite self-lubricating bushings.

[0033] Furthermore, the rotating shaft 6 can be a screw, with a nut 1 at its end. After the screw passes through the lug 11, it is fixed to the stop rod 10 with the nut 1. The nut 1 can be a slotted nut, and the rotating shaft 6 has a through hole for a cotter pin to pass through. The cotter pin cooperates with the slotted nut to achieve a reliable loosening effect.

[0034] In this embodiment, two self-lubricating bushings are used, but one or more can be used as needed. In this embodiment, one end of the self-lubricating bushings 3 and 4 has a thin annular flange with a thickness of about 1 mm. The annular flange is inserted into the space between the stop block 7 and the side wall of the lug 11 to axially limit the stop block 7. This allows the stop block 7 to be positioned approximately at the middle of the two lugs 11.

[0035] Depend on Figure 2It can be seen that a first shaft bushing 2 and a second shaft bushing 5 are provided in the mounting hole of the lug 11 to support the shaft. These two shaft bushings have flanges that contact the outer side of the lug.

[0036] In summary, the stop structure of this utility model, since the stop block 7 is a ring structure, when the stop block is impacted, the impact energy can be converted into the kinetic energy of the stop block 7 rotating around the axis. While ensuring the simplicity of the structure, it can play a role in shock absorption and buffering, reduce the maintenance of the stop block, and protect other connecting mechanisms and the whole.

[0037] This utility model embodiment also discloses a rotor system for an unmanned helicopter, which includes the aforementioned stop structure.

[0038] This utility model embodiment also discloses an unmanned helicopter, whose rotor system includes the aforementioned stop structure.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stop structure for an unmanned helicopter rotor system, characterized in that, include: The stop rod has two spaced lugs at its end, each lug having a mounting hole, and the two mounting holes are coaxially arranged. A rotating shaft passes through the mounting hole and is fixed to the lug; The stop block is a ring-shaped structure that is rotatably fitted onto the shaft and located between two lugs.

2. The stop structure of the unmanned helicopter rotor system according to claim 1, characterized in that, It also includes a self-lubricating bushing disposed between the stop block and the rotating shaft, the stop block being rotatable relative to the self-lubricating bushing.

3. The stop structure of the unmanned helicopter rotor system according to claim 2, characterized in that, Two self-lubricating bushings are provided. One end of the self-lubricating bushing has an annular flange. The annular flange is inserted into the space between the stop block and the side wall of the lug to axially limit the stop block.

4. The stop structure of the unmanned helicopter rotor system according to claim 2, characterized in that, The self-lubricating bushing is a brass-graphite self-lubricating bushing.

5. The stop structure of the unmanned helicopter rotor system according to claim 1, characterized in that, The rotating shaft is a screw.

6. The stop structure of the unmanned helicopter rotor system according to claim 4, characterized in that, The mounting hole of the lug is provided with a bushing for supporting the rotating shaft; the bushing for the rotating shaft has a flange that contacts the outer side of the lug.

7. The stop structure of the unmanned helicopter rotor system according to claim 4, characterized in that, The end of the shaft is equipped with a nut.

8. The stop structure of the unmanned helicopter rotor system according to claim 7, characterized in that, The nut is a slotted nut, and the rotating shaft has a through hole for a cotter pin to pass through, and the cotter pin is engaged with the slotted nut.

9. A rotor system for an unmanned helicopter, characterized in that, Includes the stop structure as described in any one of claims 1 to 8.

10. An unmanned helicopter, characterized in that, Its rotor system includes a stop structure as described in any one of claims 1 to 8.

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