Wheel structure of unmanned aerial vehicle

Abstract

The utility model discloses an unmanned aerial vehicle wheel structure which is used for being connected with an undercarriage of an unmanned aerial vehicle and can reduce the weight of the unmanned aerial vehicle and improve the effective load of the unmanned aerial vehicle. The device comprises a mounting rod, a mounting plate, an airplane wheel, a driving assembly and a brake pad, the mounting plate is connected to the mounting rod, the brake pad is arranged on the side, opposite to the mounting rod, of the mounting plate, the driving assembly is located on the side, facing the mounting rod, of the mounting plate, one end of the driving assembly is connected with the mounting rod, and the other end of the driving assembly is connected with the brake pad; a rotating shaft is further arranged on the side, back on to the mounting rod, of the mounting plate, a hub of the airplane wheel is connected to the rotating shaft, the hub covers the outer side of the brake pad, and the driving assembly is matched with the brake pad to be used for braking the hub.

Description

Technical Field

[0001] This application relates to the field of unmanned aerial vehicle (UAV) equipment technology, and in particular to a UAV wheel structure. Background Technology

[0002] In recent years, with the rapid development of aviation technology, small and medium-sized fixed-wing UAVs have shown increasingly broad application prospects in many fields such as military reconnaissance, surveying and mapping, agricultural plant protection, environmental monitoring, and emergency rescue, thanks to their advantages such as high flexibility, relatively low cost, and convenient deployment.

[0003] Most existing small and medium-sized fixed-wing drones use a runway takeoff and landing method. After landing, the drone will roll forward a long distance due to inertia before coming to a stop. However, an excessively long landing runway increases the risk of directional control issues, while an excessively short runway distance can easily lead to the aircraft running off the runway and causing damage. Therefore, small and medium-sized drones need to be equipped with braking devices on their wheels to shorten the landing runway distance.

[0004] Currently, the braking devices used on small and medium-sized drones are mainly the same as those used on large drones. These braking devices use a hydraulic transmission mechanism for braking. The hydraulic transmission mechanism includes at least a hydraulic pump, pipelines, and liquid. Therefore, it is large in size and heavy in weight. When installed on small and medium-sized drones, it increases the weight of the drones themselves and reduces their effective payload. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a wheel structure for a drone that can reduce the weight of the drone and increase its payload.

[0006] This application provides a wheel structure for a drone, used to connect with the drone's landing gear, including: a mounting rod, a mounting plate, a wheel, a drive assembly, and brake pads;

[0007] The mounting plate is connected to the mounting rod, the brake pad is disposed on the side of the mounting plate facing away from the mounting rod, the drive assembly is located on the side of the mounting plate facing the mounting rod, and one end of the drive assembly is connected to the mounting rod and the other end is connected to the brake pad;

[0008] The mounting plate is also provided with a rotating shaft on the side opposite to the mounting rod. The hub of the wheel is connected to the rotating shaft, and the hub covers the outside of the brake pad. The drive assembly cooperates with the brake pad to compress the hub.

[0009] Optionally, the mounting plate is provided with a cam, one end of which is located near the hub inside the brake pad and is elliptical in shape, and the other end passes through the mounting plate and is connected to the drive assembly.

[0010] Optionally, the mounting plate is provided with a connecting block, the fixed end of the brake pad is movably connected to the mounting plate, the movable end of the brake pad is connected to the connecting block through a first spring, and the cam is located between the movable end and the brake pad.

[0011] Optionally, the movable end of the brake pad is provided with a pin, the pin protruding towards the wheel hub, and the first spring is connected to the pin.

[0012] Optionally, the number of brake pads is two, the cam is disposed between the movable ends of the two brake pads, and the movable ends of the two brake pads are connected by a second spring.

[0013] Optionally, the drive assembly includes a linear servo motor and a connecting rod, with one end of the linear servo motor connected to the mounting rod and the other end connected to the cam via the connecting rod.

[0014] Optionally, the top end of the mounting rod is provided with a connecting sleeve, and the connecting sleeve is provided with a pin. The pin is used to fix the connecting sleeve to the landing gear when the connecting sleeve is connected to the landing gear.

[0015] Optionally, a guide mechanism connector is provided outside the connecting sleeve.

[0016] Optionally, brake pads are fitted to the inner wall of the wheel hub.

[0017] Optionally, a bearing is provided between the rotating shaft and the wheel hub.

[0018] As can be seen from the above technical solutions, this application has the following effects:

[0019] By connecting a mounting plate to a mounting rod, and setting a pivot on one side of the mounting plate to connect the wheel hub, a brake pad is placed on the side of the mounting plate facing away from the mounting rod. The wheel hub is fitted over the brake pad. A drive assembly is mounted on the mounting rod, located on the side of the mounting plate facing away from the mounting rod. The drive assembly is connected to both the mounting rod and the brake pad. The drive assembly and the brake pad cooperate to compress the wheel hub, and the wheel hub is compressed to achieve deceleration and braking. Thus, this application integrates the brake pad inside the wheel hub and uses the drive assembly and the brake pad to compress the wheel hub to achieve braking. This eliminates the need for the hydraulic transmission mechanism used in traditional braking technologies, solves the problem of heavy weight associated with traditional braking methods, and can improve the effective payload of small and medium-sized UAVs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the wheel structure of a drone according to this application;

[0022] Figure 2 This is another schematic diagram of the wheel structure of a drone according to this application;

[0023] Figure 3 This is another schematic diagram of the wheel structure of a drone according to this application;

[0024] Figure 4 This is a schematic diagram of a pin in the wheel structure of an unmanned aerial vehicle (UAV) according to this application;

[0025] Figure 5 This is a schematic diagram of the first spring in the wheel structure of a UAV according to this application;

[0026] Figure 6 This is a schematic diagram of the second spring in the wheel mechanism of a UAV according to this application;

[0027] In the diagram, there are: mounting rod 01, mounting plate 02, wheel hub 03, tire 04, brake pad 05, shaft 06, cam 07, connecting block 08, first spring 09, second spring 10, pin 11, linear servo motor 12, connecting rod 13, connecting sleeve 14, pin 15, guide mechanism connector 16, brake pad 17, and bearing 18. Detailed Implementation

[0028] In this utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

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

[0033] This application provides a wheel structure for a drone, which reduces the drone's weight and increases its payload. The specific implementation process of this application is described below.

[0034] Please see Figures 1 to 6 This application provides a wheel structure for a drone, used to connect with the drone's landing gear, including: a mounting rod 01, a mounting plate 02, a wheel, a drive assembly, and a brake pad 05;

[0035] Mounting plate 02 is connected to mounting rod 01. Brake pad 05 is located on the side of mounting plate 02 facing away from mounting rod 01. Drive assembly is located on the side of mounting plate 02 facing mounting rod 01, with one end of drive assembly connected to mounting rod 01 and the other end connected to brake pad 05. A rotating shaft 06 is also provided on the side of mounting plate 02 facing away from mounting rod 01. Wheel hub 03 is connected to rotating shaft 06 and wheel hub 03 covers the outside of brake pad 05. Drive assembly and brake pad 05 cooperate to compress wheel hub 03.

[0036] Mounting rod 01 is made of high-strength, lightweight metal materials, such as aluminum alloy or titanium alloy, to reduce the overall weight of the UAV while ensuring structural strength. One end of mounting rod 01 is equipped with a specific connection interface whose shape and size match the corresponding connection part on the UAV landing gear. It can achieve a reliable connection through fasteners such as bolts and screws, ensuring that the wheel structure remains stable during UAV flight and ground operation, and reducing loosening or shaking.

[0037] Mounting plate 02 is connected to the other end of mounting rod 01. Mounting plate 02 is used to mount the machine wheel. A rotating shaft 06 is horizontally arranged on mounting plate 02. The rotating shaft 06 and mounting rod 01 are located on different sides of mounting plate 02. The rotating shaft 06 and mounting rod 01 are arranged perpendicularly. The wheel hub 03 is connected to the rotating shaft 06. The machine wheel can rotate freely on the rotating shaft 06. The machine wheel consists of a wheel hub 03 and a tire 04. The tire 04 is fitted outside the wheel hub 03. The wheel hub 03 is connected to the rotating shaft 06.

[0038] One side of the mounting plate 02 is fixedly connected to the mounting rod 01, such as by bolts or welding.

[0039] Brake pad 05 is mounted on the side of the mounting plate 02 where the rotating shaft 06 is located (the side facing away from the mounting rod 01). Brake pad 05 is made of a composite material with a high coefficient of friction, wear resistance, and high temperature resistance, such as ceramic matrix composite material or semi-metallic composite material. These materials can generate a large frictional force with the wheel hub 03 during braking, thereby effectively reducing the rotational speed of the wheel and achieving rapid braking. The brake pad 05 is arc-shaped, with the inner arc close to the rotating shaft 06 and the outer arc facing the inner wall of the wheel hub 03. By pressing the outer arc of the brake pad 05 against the inner wall of the wheel hub 03, the wheel speed is reduced.

[0040] The drive assembly is located on the side of the mounting plate 02 facing the mounting rod 01. The drive assembly is the core mechanism for controlling the movement of the brake pad 05. The drive assembly can control the movement of the brake pad 05 electrically or pneumatically. When the drive assembly controls the brake pad 05 to move towards the inner wall of the wheel hub 03, it is a braking action. When the drive assembly controls the brake pad 05 to move towards the rotating shaft 06, it is a braking action.

[0041] In one method of controlling the brake pad 05, one end of the brake pad 05 can be movable to the mounting plate 02, while the other end is connected to the drive assembly, which can then drive the other end of the brake pad 05 to move. Alternatively, the brake pad 05 can be set to be entirely in a movable state, connected to the drive assembly, which can then control the movement of the entire brake pad 05.

[0042] It is understandable that, since the brake pad 05 and the drive assembly are located on different sides of the mounting plate 02, they need to penetrate the mounting plate 02 when they are connected. For example, through holes, slots, etc. can be provided on the mounting plate 02.

[0043] It should be noted that the drive component has a built-in control module, which is connected to the UAV flight control system. The UAV flight control system sends control commands to the control module, which in turn controls the drive component to perform actions.

[0044] In this embodiment, by connecting the mounting plate 02 to the mounting rod 01, a rotating shaft 06 is provided on one side of the mounting plate 02 to connect the wheel hub 03. The brake pad 05 is placed on the side of the mounting plate 02 facing away from the mounting rod 01, and the wheel hub 03 is fitted over the brake pad 05. The drive assembly is mounted on the mounting rod 01, and the drive assembly is located on the side of the mounting plate 02 facing away from the mounting rod 01. The drive assembly is connected to the mounting rod 01 and the brake pad 05 respectively. The drive assembly and the brake pad 05 cooperate to compress the wheel hub 03. The wheel hub 03 is compressed to achieve deceleration and braking. Thus, this application integrates the brake pad 05 inside the wheel hub 03 and uses the drive assembly and the brake pad 05 to compress the wheel hub 03 to achieve wheel braking. This abandons the traditional method of using a hydraulic transmission mechanism for braking, solves the problem of heavy weight caused by traditional braking methods, and can improve the effective payload of small and medium-sized UAVs.

[0045] Please continue reading. Figure 1 In an optional embodiment, a cam 07 is provided on the mounting plate 02. One end of the cam 07 near the hub 03 is located inside the brake pad 05 and is elliptical in shape. The other end passes through the mounting plate 02 and is connected to the drive assembly.

[0046] In this embodiment, the elliptical end of the cam 07 is located on the side of the mounting plate 02 facing away from the mounting rod 01, and the elliptical end is close to the brake pad 05. The other end of the cam 07 passes through the mounting plate 02 and is connected to the drive assembly. The drive assembly can control the rotation of the cam 07. When the cam 07 rotates, it squeezes the brake pad 05 outward (towards the inner wall of the hub 03) through its elliptical end to achieve the braking action.

[0047] Under normal conditions (without braking), the short axis of the elliptical end faces the brake pad 05. When braking is required, the cam 07 rotates, and the long axis of its elliptical end rotates to gradually squeeze the brake pad 05, thereby achieving the braking action.

[0048] Please continue reading. Figure 5In this optional embodiment, a connecting block 08 is provided on the mounting plate 02, the fixed end of the brake pad 05 is movably connected to the mounting plate 02, the movable end of the brake pad 05 is connected to the connecting block 08 through the first spring 09, and the cam 07 is located between the movable end and the brake pad 05.

[0049] In this embodiment, braking is achieved using a single brake pad 05. The fixed end of the brake pad 05 is movably connected to the mounting plate 02, allowing the brake pad 05 to rotate around its fixed end. With the rotating shaft 06 as the center, the brake pad 05 is mounted on one side of the rotating shaft 06, and a connecting block 08 is provided on the other side of the rotating shaft 06. The movable end of the brake pad 05 is connected to the connecting block 08 via a first spring 09. Under the action of the first spring 09, the movable end of the brake pad 05 always tends to move towards the elliptical end of the cam 07 shaft, pressing against the elliptical end. Therefore, when the elliptical end rotates, the major axis of the elliptical end will gradually squeeze the movable end of the brake pad 05, causing the movable end to gradually approach the inner wall of the hub 03, thus achieving gradual braking.

[0050] The brake pad 05 is detachably connected to the mounting plate 02, so that it can be removed and replaced with a new brake pad 05 later.

[0051] In this optional embodiment, the movable end of the brake pad 05 is provided with a pin 11, which protrudes towards the wheel hub 03, and a first spring 09 is connected to the pin 11. In this embodiment, one end of the first spring 09 is connected to the pin 11, and the other end is connected to the connecting block 08. The first spring 09 is always in a stretched state and always has a contraction force, which causes the movable end of the brake pad 05 to move towards the cam 07.

[0052] Please continue reading. Figure 6 In this optional embodiment, there are two brake pads 05, and a cam 07 is disposed between the movable ends of the two brake pads 05. The movable ends of the two brake pads 05 are connected by a second spring 10.

[0053] In this embodiment, two brake pads 05 are provided, which surround the rotating shaft 06. The fixed ends of the two brake pads 05 are movably connected to the mounting plate 02, and the movable ends of the two brake pads 05 face the elliptical ends of the cam 07. When the cam 07 rotates, it can push the two brake pads 05 at the same time, squeezing the inner wall of the wheel hub 03 from both sides, thereby improving the stability of braking, increasing the braking area, and accelerating the braking speed.

[0054] The movable ends of the two brake pads 05 are connected by a second spring 10, which is always in a stretched state. Therefore, the interacting ends of the two brake pads 05 are always in contact with the cam 07. After braking, the cam 07 is rotated. At this time, under the action of the second spring 10, the movable ends of the two brake pads 05 move relative to each other, thereby moving away from the inner wall of the wheel hub 03.

[0055] In an optional embodiment, the drive assembly includes a linear servo motor 12 and a connecting rod 13. One end of the linear servo motor 12 is connected to the mounting rod 01, and the other end is connected to the cam 07 via the connecting rod 13. In this embodiment, one end of the linear servo motor 12 is movably connected to the mounting rod 01, allowing the linear servo motor 12 to rotate around the connection point. The other end (telescopic end) of the linear servo motor 12 is connected to the connecting rod 13, which in turn is connected to the cam 07. Therefore, when the telescopic end of the linear servo motor 12 moves telescopically, the connecting rod 13 can control the cam 07 to rotate. At this time, the elliptical end of the cam 07 pushes the brake pad 05 to move.

[0056] Compared to the hydraulic rod in a traditional hydraulic brake, the linear servo motor 12 is smaller, lighter, easier to operate, more precise, and responds faster in controlling the brakes, thus effectively shortening the braking distance.

[0057] In an optional embodiment, a connecting sleeve 14 is provided at the top of the mounting rod 01, and a pin 15 is provided on the connecting sleeve 14. The pin 15 is used to fix the connecting sleeve 14 to the landing gear when it is connected to the landing gear. In this embodiment, by providing the connecting sleeve 14 and the pin 15, a detachable connection between the mounting rod 01 and the landing gear can be achieved, facilitating the inspection and maintenance of the wheels. In actual use, the connecting sleeve 14 of the mounting rod 01 is fitted onto the landing gear, and the pin 15 is then inserted laterally through the connecting sleeve 14 and the landing gear to stably connect the connecting sleeve 14 to the landing gear.

[0058] In this optional embodiment, a guide mechanism connector 16 is provided outside the connecting sleeve 14. In this embodiment, by providing the guide mechanism connector 16, after the mounting rod 01 is connected to the landing gear, it can be connected to the landing gear shock absorption guide mechanism through the guide mechanism connector 16, and the two are fixed by bolts.

[0059] In an optional embodiment, a brake pad 17 is attached to the inner wall of the wheel hub 03. The brake pad 17 can be a semi-metallic brake pad 17, a ceramic-based brake pad 17, an organic-based brake pad 17, etc. The connection between the brake pad 17 and the wheel hub 03 can be achieved by adhesive bonding, snap-fit ​​connection, etc. When fixing the brake pad 17, it needs to cover the inner wall of the wheel hub 03 to ensure that the brake pad 05 is in direct contact with the brake pad 17, so that the brake pad 05 does not directly act on the wheel hub 03, thereby reducing damage to the wheel hub 03.

[0060] In an optional embodiment, a bearing 18 is provided between the rotating shaft 06 and the hub 03. In this embodiment, a through hole is provided in the middle of the hub 03, and the bearing 18 is provided in the through hole. The bearing 18 is sleeved on the rotating shaft 06 to realize the connection between the hub 03 and the rotating shaft 06. By providing the bearing 18, the hub 03 is in a free state on the rotating shaft 06 and can rotate freely when controlled.

[0061] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wheel structure of a drone for connection with a landing gear of the drone, characterized in that, The machine wheel structure comprises a mounting rod, a mounting plate, a machine wheel, a driving assembly and a brake pad. The mounting plate is connected to the mounting rod, the brake pad is arranged on the side of the mounting plate away from the mounting rod, the driving assembly is arranged on the side of the mounting plate facing the mounting rod, one end of the driving assembly is connected to the mounting rod, and the other end is connected to the brake pad. The side of the mounting plate away from the mounting rod is further provided with a rotating shaft, the hub of the machine wheel is connected to the rotating shaft, and the hub cover is arranged outside the brake pad, the driving assembly cooperates with the brake pad to press the hub.

2. The wheel structure of claim 1, wherein The mounting plate is provided with a cam, one end of the cam near the hub is arranged inside the brake pad, and the other end of the cam is arranged outside the mounting plate and connected to the driving assembly.

3. The wheel structure of claim 2, wherein The mounting plate is provided with a connecting block, the fixed end of the brake pad is movably connected to the mounting plate, the movable end of the brake pad is connected to the connecting block through a first spring, and the cam is arranged between the movable end and the brake pad.

4. The wheel structure of claim 3, wherein The movable end of the brake pad is provided with a pin, the pin protrudes towards the hub, and the first spring is connected to the pin.

5. The wheel structure of claim 2, wherein The number of brake pads is two, the cam is arranged between the movable ends of the two brake pads, and the movable ends of the two brake pads are connected through a second spring.

6. A wheel construction according to any one of claims 2 to 5, c h a r a c t e r i s e d in that The driving assembly comprises a linear servo motor and a connecting rod, one end of the linear servo motor is connected to the mounting rod, and the other end is connected to the cam through the connecting rod.

7. The wheel structure according to any one of claims 1 to 5, characterized in that, The top end of the mounting rod is provided with a connecting sleeve, the connecting sleeve is provided with a pin column, and the pin column is used to fix the connecting sleeve on the landing gear when the connecting sleeve is connected to the landing gear.

8. The wheel structure of claim 7, wherein The connecting sleeve is provided with a guide mechanism connector.

9. The wheel structure according to any one of claims 1 to 5, characterized in that, The inner wall of the hub is attached with a brake pad.

10. The wheel structure according to any one of claims 1 to 5, characterized in that, A bearing is arranged between the rotating shaft and the hub.

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