A drone guyed throttle control mechanism

Abstract

The utility model relates to unmanned plane technical field, in view prior art anti -vibration and high temperature resistance are insufficient, the problem of not enough flexible installation, disclose a kind of unmanned plane guy wire throttle control mechanism. The mechanism includes motion conversion subassembly and installation component;The motion conversion subassembly includes swing arm, guy wire, guy wire protective sleeve, pivot and pivot clamp, swing arm connects rudder output shaft and guy wire, and the other end of guy wire is connected throttle control lever through protective sleeve, and pivot is clamped and fixed in the middle part of protective sleeve by clamp;The installation component includes rudder support and pivot support, and rudder support fixes rudder in the position away from engine, and pivot support is L type piece, and its vertical part is equipped with the hole of supporting pivot. The utility model passes through guy wire transmission and pivot support structure, effectively isolates engine vibration and high temperature, improves rudder life and control accuracy, and has the advantages of flexible layout, easy installation and maintenance simultaneously, especially applicable to oil -driven fixed wing unmanned plane.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a throttle control mechanism for UAVs. Background Technology

[0002] The servo motors of gasoline-powered drones are used to control the engine throttle. Specifically, they receive control signals and change the opening of the engine throttle valve through a mechanical transmission mechanism, thereby controlling the engine speed and power output.

[0003] Most existing throttle control mechanisms connect the servo to the throttle via rigid linkage or cable drive. One method is the rigid linkage, such as the modular fixed-wing UAV throttle control mechanism disclosed in Chinese Utility Model Patent CN214493350U, which includes a servo assembly, a cable assembly, a rocker arm assembly, and a support component. The rocker arm assembly controls the UAV throttle, and the rotating arm, fastening sleeve, and servo assembly work together to secure the throttle control mechanism to the UAV. The second method is the cable drive, such as the throttle control device for a gasoline-powered UAV disclosed in Chinese Utility Model Patent CN214241251U, which allows the extension and retraction of the throttle cable to be controlled by a linear servo.

[0004] While the aforementioned technology can achieve throttle control, it is not comprehensive and has the following drawbacks: Mounting the servo directly near the engine and pushing the throttle control lever directly via a linkage mechanism results in the servo's service life and reliability being severely affected by high temperatures and engine vibrations due to its proximity to the engine. Furthermore, the installation location of the servo is extremely limited for some compact UAVs. Additionally, the use of multiple interconnected components such as the rocker arm assembly and fastening sleeve makes assembly and adjustment cumbersome and inconvenient for later maintenance. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of insufficient vibration resistance and high temperature resistance, and insufficient installation flexibility of the existing technology, and to provide a cable-operated throttle control mechanism for unmanned aerial vehicles. This mechanism can install the servo motor in a position away from the engine and reliably control the throttle through cable transmission. It has the advantages of high temperature resistance, good vibration isolation and flexible installation.

[0006] To achieve the above objectives, this application proposes the following technical solution:

[0007] A cable-operated throttle control mechanism for unmanned aerial vehicles (UAVs) for driving the movement of an engine throttle control lever includes a motion conversion component and a mounting component.

[0008] The motion conversion assembly, connecting the servo output shaft and the engine throttle control lever, includes a rocker arm, a cable, a cable protection sleeve, a rotating shaft, and a rotating shaft clamp. The rocker arm is a plate-shaped strip component, with one end widened by an arc and having a mounting hole for hinged connection with the servo output shaft, and a protruding swing limiting device on the side. The other end is narrower and has a fixing part for connection with the cable. One end of the cable is fixed to the fixing part of the rocker arm, and the other end passes through the cable protection sleeve and connects to the engine throttle control lever. The rotating shaft is a straight rod structure and is clamped and fixed to the middle of the cable protection sleeve by the rotating shaft clamp, providing a stable rotation support point for the cable protection sleeve. The motion conversion assembly design achieves physical isolation between the servo and the engine through cable transmission, and has the advantages of vibration resistance and flexible layout. The rocker arm is equipped with a limiting device to limit the maximum swing angle range of the rocker arm. In addition, the motion conversion assembly of this application has a simple and clear structural design, which can be directly visually inspected in the operating state without disassembling any parts, thus improving maintenance efficiency.

[0009] The mounting assembly includes a servo bracket and a pivot bracket. The servo bracket is a frame structure with multiple mounting holes at the bottom. The servo bracket secures the servo to the UAV body or frame in a suitable position away from the engine, thus keeping the servo away from the engine's high-temperature zone and extending its service life. The servo is fixed to the UAV body or frame away from the engine via the servo bracket. The pivot bracket is an L-shaped structure, including a base plate and a vertical support. The base plate has mounting holes for fixing to the body or frame with fasteners. The vertical support has support holes that mate with the pivot, thereby limiting the pivot's axial displacement and radial runout.

[0010] Specifically, the rocker arm body is provided with weight reduction holes, and its plate edge is chamfered and rounded. The weight reduction hole design of the rocker arm reduces the weight of the mechanism; the chamfered and rounded transitions avoid stress concentration, improve reliability, and meet the lightweight and durability requirements of UAVs.

[0011] Specifically, the cable is a flexible cable, with its two ends connected to the rocker arm and the engine throttle control lever, respectively. The cable is used to move the engine throttle control lever by rotating the rocker arm, thereby controlling the engine throttle position. It converts the circular motion of the servo motor into linear motion of the cable, achieving control of the throttle travel, which is simple and reliable. Furthermore, compared to traditional rigid rod connections that directly transmit engine vibration, this application uses a cable to achieve a flexible connection between the engine and the servo motor, effectively reducing the impact of engine vibration on the servo motor and improving its service life.

[0012] Specifically, the cable protection sleeve is a hollow tubular structure with clamps or retaining rings at both ends for fixing and limiting. The hollow tubular structure guides and protects the cable; the clamps / retaining rings at both ends prevent it from shifting and falling off, ensuring reliable and accurate transmission; the cable protection sleeve can be bent and laid, adapting to complex and narrow machine space layouts, and has high installation flexibility.

[0013] Specifically, the rotating shaft clamp has an open ring structure and is equipped with fastening bolts for clamping and fixing the cable protection sleeve. This provides a stable, rigid rotational fulcrum for the cable protection sleeve, converting the linear motion of the cable into precise rotational motion and ensuring reliable control.

[0014] Specifically, the vertical support portion of the servo bracket includes a pair of parallel support lugs, each lug having a shaft hole that mates with the rotating shaft. The L-shaped structure balances stable installation with support height; the support holes precisely constrain the rotating shaft, limiting runout and ensuring reliable and smooth transmission.

[0015] Specifically, the mounting holes on the servo bracket and the pivot bracket are round or elliptical holes, with chamfered or reinforced edges around the holes. Elliptical holes allow for fine-tuning of the mounting position, enhancing adaptability to different models; chamfered or reinforced edges improve the strength and reliability of the connection points.

[0016] Beneficial effects:

[0017] As can be seen from the above technical solutions, the present invention provides a cable-operated throttle control mechanism for unmanned aerial vehicles (UAVs), which has the following advantages compared with the prior art:

[0018] 1. Regarding vibration resistance and high-temperature resistance, unlike the traditional method of mounting servos near the engine, this application, through the design of a motion conversion component, allows the servo to be installed in an ideal location away from the engine's high-temperature zone. This reduces the impact of the high-temperature environment generated by the engine on the servo's lifespan and reliability. Furthermore, compared to the traditional rigid rod connection that directly transmits engine vibration, this application uses a cable to achieve a flexible connection between the engine and the servo, effectively reducing the impact of engine vibration on the servo's lifespan and improving its reliability.

[0019] 2. In terms of ease of installation and maintenance, the cable protection sleeve can be bent and laid, which can adapt to complex and narrow fuselage space layouts and has high installation flexibility. Traditional rigid rod connections require the removal of the engine hood for maintenance. This application supports the installation of the servo in the equipment compartment. With the rocker arm and cable structure, the control mechanism can be directly visually inspected in the operating state without disassembling any parts, which greatly improves maintenance efficiency.

[0020] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other.

[0021] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0022] The accompanying drawings are not drawn to scale according to a true reference numeral. In the drawings, each identical or nearly identical component shown in the various figures can be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is an isometric view of a cable-operated throttle control mechanism for an unmanned aerial vehicle (UAV) disclosed in this utility model.

[0024] Figure 2 This is an isometric view of a cable-operated throttle control mechanism for a drone disclosed in this utility model from another direction;

[0025] Figure 3 This is a front view of a cable-operated throttle control mechanism for a drone disclosed in this utility model;

[0026] The specific meanings of each mark in the diagram are as follows:

[0027] 1-Servo motor, 2-Rocker arm, 3-Wire cable, 4-Wire cable protective sleeve, 5-Shaft clamp, 6-Shaft, 7-Servo motor bracket, 8-Shaft bracket, 9-Servo motor output shaft, 10-Mounting hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0029] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" mean that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] The following detailed description of a drone cable-operated throttle control mechanism disclosed in this utility model, with reference to the specific structure of the embodiment shown in the accompanying drawings, will provide further details.

[0031] Figure 1 and Figure 2 These are isometric views of the throttle control mechanism disclosed in this utility model and isometric views from another direction. Figure 3 This is a front view of the throttle control mechanism disclosed in this utility model.

[0032] like Figure 1-3 As shown, a cable-operated throttle control mechanism for a drone includes a motion conversion component and a mounting component:

[0033] The motion conversion assembly, connecting the servo output shaft 9 and the engine throttle control lever, includes a rocker arm 2, a cable 3, a cable protective sleeve 4, a rotating shaft 6, and a rotating shaft clamp 5. The rocker arm 2 is a plate-shaped strip component, with one end widened by an arc and provided with a mounting hole for hinged to the servo output shaft 9, and a protruding swing limiting device on the side. The other end is narrower and has a fixing part connected to the cable 3. One end of the cable 3 is fixed to the fixing part of the rocker arm 2, and the other end passes through the cable protective sleeve 4 and is connected to the engine throttle control lever. The rotating shaft 6 is a straight rod structure and is clamped and fixed to the middle of the cable protective sleeve 4 by the rotating shaft clamp 5.

[0034] The mounting assembly includes a servo bracket 7 and a pivot bracket 8. The servo bracket 7 is a frame structure with multiple mounting holes 10 at the bottom. The servo 1 is fixed to the UAV body or frame away from the engine via the servo bracket 7. The pivot bracket 8 is an L-shaped structure, including a base plate and a vertical support. The base plate has mounting holes 10 and is fixed to the body or frame by fasteners. The vertical support has support holes that mate with the pivot 6.

[0035] Specifically, taking the throttle control mechanism of a fixed-wing gasoline-powered UAV as an example, Figure 1 The installation process of a cable-operated throttle control mechanism for a drone is as follows:

[0036] First, install the servo motor 1 inside the servo motor bracket 7, and then fix the servo motor 1 in a suitable position with less vibration inside the UAV body by passing the bolt through the mounting hole 10 on the base plate of the servo motor bracket 7.

[0037] The shaft bracket 8 is fixed to the machine body with bolts through the mounting holes 10 on its base plate at a position close to the engine throttle control lever and convenient for cable routing 3.

[0038] Both ends of the rotating shaft 6 are inserted into the support holes in the vertical part of the rotating shaft bracket 8. The support hole and the rotating shaft 6 are clearance-fitted, allowing the rotating shaft 6 to rotate freely with low resistance, while effectively restricting its radial and axial movement.

[0039] Place the middle part of the cable protection sleeve 4 on the rotating shaft 6, and use the rotating shaft clamp 5 to tightly clamp it onto the rotating shaft 6. Tighten the fastening bolts on the rotating shaft clamp 5 to ensure that the cable protection sleeve 4 and the rotating shaft 6 are fixed together and rotate synchronously. The two ends of the cable protection sleeve 4 are pressed and fixed with metal sleeves to prevent them from loosening.

[0040] Finally, one end of the cable 3 is passed through the mounting hole at the far end of the rocker arm 2 and locked in place, while the other end is passed through the fixed cable protection sleeve 4 and connected to the engine throttle control lever. The near end of the rocker arm 2 is then fixedly mounted on the output shaft 9 of the servo motor 1.

[0041] Furthermore, taking the throttle control scenario of a fixed-wing gasoline-powered UAV as an example, Figure 1 The working process of a cable-operated throttle control mechanism for a drone is as follows:

[0042] When throttle adjustment is needed, servo 1 receives a command from the flight control system and rotates, causing rocker arm 2 to swing around its axis. The free end of rocker arm 2 is connected to the engine throttle control lever via cable 3. As rocker arm 2 swings, it pulls or pushes the throttle control lever via cable 3. Figure 1 As shown in the diagram, when rocker arm 2 swings counterclockwise, cable 3 is pulled, increasing the throttle opening; when rocker arm 2 swings clockwise, cable 3 is pushed, decreasing the throttle opening. Furthermore, the swing angle of rocker arm 2 has a linear relationship with the engine throttle opening: a 90° leftward rotation of rocker arm 2 corresponds to full throttle opening, and a 90° rightward rotation corresponds to full throttle closing. During this process, the mechanism converts the rotational motion of servo motor 1 into the linear displacement of cable 3, thereby driving the opening and closing of the throttle.

[0043] Specifically, the length of the pull cable 3 is 0.5m-1.2m, which ensures a distance interval of 0.5m-1.2m between the engine and the servo motor 1. Further, the length of the pull cable 3 is designed considering the following: Due to the minimum bending radius of approximately 0.15m when the rocker arm 2 swings, the pull cable 3 needs to maintain a certain straight section to avoid bending. Too short a length would cause the pull cable 3 to bend at an acute angle, increasing friction and wear; too short a length would force the servo motor 1 to remain near the engine compartment, which contradicts the purpose of this application; therefore, the shortest length of the pull cable 3 is approximately 0.5m. Additionally, since the fuselage length of the UAV is typically <2m, an extra-long pull cable 3 requires additional guide wheels, increasing structural complexity; a long pull cable 3 is prone to resonance under high-frequency vibration of the engine. Actual testing showed that when the length is >1.2m, the amplitude is amplified to twice that at 0.5m, affecting control accuracy. Therefore, the longest length of the pull cable 3 is approximately 1.2m. Preferably, in this embodiment, the length of the pull cable 3 is 0.8m.

[0044] In this embodiment, the rocker arm 2 is made of magnesium-aluminum sheet, with weight-reducing holes milled on it, and chamfered and rounded at all edges to achieve the effects of weight reduction and preventing stress concentration.

[0045] The mounting holes 10 on the servo bracket 7 and the shaft bracket 8 are 4mm diameter round holes. Preferably, some holes are designed as elongated elliptical holes to facilitate fine-tuning during installation to adapt to different installation baselines. The holes are chamfered around their perimeter to facilitate bolt insertion and improve fatigue resistance.

[0046] The UAV cable-operated throttle control mechanism disclosed in this embodiment supports the installation of the servo motor about 0.8m away from the engine through cable transmission and shaft support structure, effectively isolating the engine vibration and high temperature, improving the servo motor life and control accuracy, and also has the advantages of flexible layout and convenient installation and maintenance.

[0047] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A cable-operated throttle control mechanism for unmanned aerial vehicles (UAVs), used to drive the engine throttle control lever, characterized in that, Includes motion conversion components and mounting components: The motion conversion assembly connects the servo output shaft (9) and the engine throttle control lever, and includes a rocker arm (2), a cable (3), a cable protective sleeve (4), a shaft (6), and a shaft clamp (5). The rocker arm (2) is a plate-shaped strip component, with one end widened by an arc and provided with a mounting hole for hinge connection with the servo output shaft (9), and a protruding swing limiting device on the side. The other end is narrower and provided with a fixing part for connection with the cable (3). One end of the cable (3) is fixed to the fixing part of the rocker arm (2), and the other end passes through the cable protective sleeve (4) and is connected to the engine throttle control lever. The shaft (6) is a straight rod structure and is clamped and fixed in the middle of the cable protective sleeve (4) by the shaft clamp (5). The mounting assembly includes a servo bracket (7) and a pivot bracket (8). The servo bracket (7) is a frame structure with multiple mounting holes at the bottom. The servo (1) is fixed to the UAV body or frame away from the engine via the servo bracket (7). The pivot bracket (8) is an L-shaped structure, including a base plate and a vertical support. The base plate has mounting holes (10) and is fixed to the body or frame by fasteners. The vertical support has support holes that cooperate with the pivot (6).

2. The unmanned aerial vehicle (UAV) cable-operated throttle control mechanism according to claim 1, characterized in that, The rocker arm (2) has weight reduction holes on its main body, and its plate edge has chamfers and rounded corners.

3. The unmanned aerial vehicle (UAV) cable-operated throttle control mechanism according to claim 1, characterized in that, The pull cable (3) is a flexible cable, with its two ends connected to the rocker arm (2) and the engine throttle control lever, respectively.

4. The unmanned aerial vehicle (UAV) cable-operated throttle control mechanism according to claim 1, characterized in that, The pull wire protective sleeve (4) is a hollow tubular structure with hoops or retaining rings at both ends for fixing and limiting.

5. The unmanned aerial vehicle (UAV) cable-operated throttle control mechanism according to claim 1, characterized in that, The rotating shaft clamp (5) is an open ring structure and is equipped with fastening bolts for clamping and fixing the pull wire protective sleeve (4).

6. The unmanned aerial vehicle (UAV) cable-operated throttle control mechanism according to claim 1, characterized in that, The vertical support portion of the rotating shaft bracket (8) includes a pair of parallel support lugs, and the lugs are provided with shaft holes that cooperate with the rotating shaft (6).

7. The unmanned aerial vehicle (UAV) cable-operated throttle control mechanism according to claim 1, characterized in that, The mounting holes (10) on the servo bracket (7) and the pivot bracket (8) are round or elliptical holes, and the periphery of the holes is provided with chamfers or reinforcing structures.

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