Connecting device of air inlet channel and engine

Abstract

The utility model provides a connecting device for an air inlet channel and an engine, and belongs to the technical field of unmanned aerial vehicle body structures, and the connecting device comprises a fixed seat fixed in an unmanned aerial vehicle, an adapter ring arranged at the end part of the air inlet channel, a sealing compression ring arranged between an engine pipeline and the adapter ring, and a holding structure. Axial clamping of the engine pipeline, the sealing pressing ring and the adapter ring is achieved through radial displacement of the enclasping structure, the sealing pressing ring plays a sealing role, and therefore sealing connection between the engine pipeline and the air inlet channel is achieved. The fixing base is connected with the unmanned aerial vehicle body, vibration displacement of the engine pipeline and the air inlet channel is reduced, and the air inlet channel is further fixed through the arranged auxiliary positioning device. And the connecting device can adapt to engine pipelines and air inlet channels with different diameter sizes caused by installation of engines of different models, and has universality.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) airframe structure technology, specifically relating to a convenient connection device for a replaceable air intake and engine within the UAV airframe. Background Technology

[0002] In the field of unmanned aerial vehicle (UAV) technology, the air intake and engine, as core components of the UAV power system, play a crucial role in the performance of the UAV. Currently, UAV engines and air intakes are mainly designed quantitatively based on given mission requirements. Once the UAV air intake and connecting frame are fixed, they are not replaced or moved. The docking surface is connected to the air intake by axially moving the engine.

[0003] As the application scenarios of drones continue to expand, they are being forced to develop towards higher maneuverability, higher aerodynamic efficiency, and multi-functionality to meet more demanding application requirements. The power system design needs to be adaptable to usage requirements at all times, requiring the installation of different air intakes for engines with varying thrust to ensure good air intake efficiency during flight. Because the combustion chamber lengths of different engine models within the drone engine mounting frame are inconsistent, and the diameter and length of the air intake must also change due to variations in air intake volume, the air intake can no longer be fixed in its arrangement. Furthermore, using existing methods to match different engine models and air intakes would create excessive constraints during engine assembly, leading to installation difficulties or even improper installation resulting in insufficient air intake and flight accidents. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide a connection device between the air intake and the engine, so as to solve at least one of the technical problems existing in the prior art, such as the change in the diameter of the air intake caused by engine replacement, the over-constraint of the existing method leading to installation difficulties, or even improper installation leading to insufficient air intake and easy to cause flight accidents.

[0005] This application provides a connection device between an air intake manifold and an engine, comprising:

[0006] A mounting base for connecting to the body of a drone, wherein the mounting base has a groove.

[0007] The adapter ring is a tubular structure with a radially extended portion at one end. The adapter ring is used to be fixedly sleeved on the end of the air intake duct, and the extended portion is located close to the end of the air intake duct.

[0008] The sealing pressure ring is a ring-shaped structure, which is coaxially arranged between the engine pipe and the outer extension of the adapter ring, and is used for sealing the connection between the engine pipe and the intake manifold.

[0009] The holding structure is hinged to the fixing base, and an annular groove is formed in the inner side of the holding structure. The holding structure clamps the outer extension part of the sealing compression ring and the adapter ring through the annular groove, so as to connect the air inlet channel with the engine.

[0010] Preferably, the groove formed in the fixing base is in the form of a circular arc, and the groove is used for placing the sealing compression ring and the adapter ring.

[0011] Preferably, the diameter of the groove of the fixing base is greater than the diameter of the sealing compression ring or the adapter ring.

[0012] Preferably, the axial two sides of the groove of the fixing base are provided with limiting parts for axially limiting the engine pipeline and the adapter ring.

[0013] Preferably, the depth of the annular groove of the holding structure in the radial direction is greater than the thickness of the sealing compression ring and the length of the outer extension part of the adapter ring in the radial direction.

[0014] Preferably, the sealing compression ring is made of rubber.

[0015] Preferably, a circumferential annular groove is formed in the end face of the outer extension part of the adapter ring, and the annular groove is used for accommodating the sealing part of the sealing compression ring.

[0016] Preferably, the holding structure comprises:

[0017] A first clamping part, the first end of which is hinged to the fixing base;

[0018] A second clamping part, the first end of which is hinged to the fixing base, and the second clamping part is arranged opposite to the first clamping part;

[0019] A first locking pin, which connects the second ends of the first clamping part and the second clamping part.

[0020] Preferably, the auxiliary positioning device is used for being connected in the unmanned aerial vehicle body and fixing the air inlet channel.

[0021] Preferably, the auxiliary positioning device comprises:

[0022] A support frame, which is used for being fixed in the unmanned aerial vehicle body;

[0023] Two pieces of binding belts, the first ends of which are connected to the support frame respectively, and the second ends of which are respectively wound around the air inlet channel and buckled on the air inlet channel;

[0024] A second locking pin, which connects the second ends of the two pieces of binding belts.

[0025] Preferably, each of the locking pins comprises a bolt and a nut.

[0026] The application has the beneficial effects:

[0027] The application provides a connecting device for an air inlet channel and an engine, which realizes axial clamping of an engine pipeline, a sealing compression ring and an adapter ring through radial displacement of a holding structure, the sealing compression ring plays a sealing role, thereby realizing sealed connection between the engine pipeline and the air inlet channel. The fixing seat is connected with the unmanned aerial vehicle body, thereby reducing vibration displacement of the engine pipeline and the air inlet channel, the auxiliary positioning device is arranged, and the fixing effect of the air inlet channel is further realized, so that the structural stability requirement of large maneuvering flight is met. The connecting device requires a small operation space, a large-size opening cover does not need to be formed on the machine body, personnel disassembly and installation are convenient. Moreover, the connecting device can be adapted to engine pipelines and air inlet channels with different diameters caused by installation of different models of engines, and has universality. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and other objects, features and advantages of the present application will become more apparent from the following description of the embodiments of the present application with reference to the attached drawings.

[0029] Figure 1 is a mounting schematic view of the connecting device for an air inlet channel and an engine according to the embodiments of the present application;

[0030] Figure 2 is a side structure schematic view of the fixing seat and the holding structure according to the embodiments of the present application; Figure 1 is a cross-sectional schematic view of A-A in the connecting device for an air inlet channel and an engine according to the embodiments of the present application;

[0031] Figure 3 is a side structure schematic view of the fixing seat and the holding structure according to the embodiments of the present application;

[0032] Figure 4 is an axial side schematic view of the fixing seat according to the embodiments of the present application;

[0033] Figure 5 is an axial side schematic view of the sealing compression ring according to the embodiments of the present application;

[0034] Figure 6 is an axial side schematic view of the adapter ring according to the embodiments of the present application.

[0035] Wherein, 1-engine pipeline, 2-holding structure, 3-sealing compression ring, 4-adapter ring, 5-air inlet channel, 6-belt, 7-support frame, 8-fixing seat, 9-first locking pin, 10-limiting part, 11-second locking pin. DETAILED DESCRIPTION

[0036] Various embodiments of the present application will be described in more detail below with reference to the accompanying drawings. In the various drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, the various parts in the drawings are not drawn to scale.

[0037] With reference to Figures 1-6 The application provides a convenient connecting device for an air inlet channel 5 and an engine, comprising: a fixing seat 8 for being connected in a UAV body, a groove being formed in the fixing seat 8; an adapter ring 4 in a tubular structure, one end of the adapter ring 4 being provided with a radial extension part, the adapter ring 4 being used for being fixedly sleeved on an end part of the air inlet channel 5, and the extension part being arranged close to the end part of the air inlet channel 5; a sealing compression ring 3 in a ring structure, being used for being coaxially arranged between an engine pipeline 1 and the extension part of the adapter ring, and being used for sealing communication between the engine pipeline 1 and the air inlet channel 5; and a clamping structure 2 being hinged on the fixing seat 8, an inner side of the clamping structure 2 being provided with a circumferential ring groove, the clamping structure 2 clamping the extension part of the engine, the sealing compression ring 3 and the extension part of the adapter ring through the ring groove, and being used for connecting the air inlet channel 5 and the engine.

[0038] In the embodiment, the end part of the engine pipeline 1 is provided with a radial extension part, the diameter of the extension part of the engine pipeline 1 being the same as that of the extension part of the adapter ring 4 of the air inlet channel 5, the extension part of the engine pipeline 1, the sealing compression ring 3 and the extension part of the adapter ring 4 being compressed in the ring groove of the clamping structure 2 through radial displacement of the clamping structure 2, the relative displacement of the engine pipeline 1 and the adapter ring 4 being realized, and the sealing compression ring 3 being compressed, so that the sealing between the engine pipeline 1 and the air inlet channel 5 is realized through the sealing compression ring 3.

[0039] In the embodiment, the adapter ring 4 is bonded to the air inlet channel 5, and plays a fixing role.

[0040] With reference to Figure 1 , Figure 3 and Figure 4 The cross section of the groove formed in the fixing seat 8 is in a circular arc shape, and the groove is used for placing the engine pipeline 1, the sealing compression ring 3 and the adapter ring 4. The diameter of the groove of the fixing seat 8 is greater than that of the sealing compression ring 3 or the adapter ring 4. In turn, the engine pipeline 1, the sealing compression ring 3 and the adapter ring 4 of different diameters can be placed.

[0041] Limiting parts 10 are arranged on the two axial sides of the groove of the fixing seat 8, and are used for axially limiting the engine pipeline 1 and the adapter ring 4. It should be understood that the distance between the two limiting parts 10 can accommodate the extension part of the engine pipeline 1, the sealing compression ring 3 and the extension part of the adapter ring 4, and has a radial movement allowance, so as to ensure that the engine pipeline 1 and the adapter ring 4 of different sizes can be placed.

[0042] In the embodiment, the depth of the ring groove in the radial direction of the holding structure 2 is greater than the thickness of the sealing compression ring 3 and the length in the radial direction of the outer extension part of the adapter ring 4. The greater depth value can accommodate engine pipes 1 and adapter rings 4 of different diameters to adapt to different models of engines.

[0043] With reference to Figure 1 and Figure 6 , a circumferential ring groove is formed on the end face of the outer extension part of the adapter ring 4 for accommodating the sealing part of the sealing compression ring 3.

[0044] With reference to Figure 1 and Figure 5 , the sealing compression ring 3 is made of rubber material and realizes the sealing of the butt joint of the engine pipe 1 and the adapter ring 4 under the action of pressure. A ring-shaped protruding part is arranged on the end face of the axial end of the sealing compression ring 3, which is fitted and installed in the ring groove of the outer extension part of the adapter ring 4 to strengthen the sealing effect.

[0045] In an optional embodiment, the ring groove of the end face of the outer extension part of the adapter ring 4 can be V-shaped, and the ring groove can be multiple, thereby strengthening the sealing effect. When the ring groove is multiple, the sealing compression ring 3 is arranged in a ring shape and deformed by extrusion, so that part of it is extruded into the multiple ring grooves, also achieving good sealing effect.

[0046] In the embodiment, with reference to Figure 1 and Figure 3 , the holding structure 2 comprises: a first clamping part, the first end of which is hinged to the fixed seat 8; a second clamping part, the first end of which is hinged to the fixed seat 8, and which is arranged opposite to the first clamping part; and a first locking pin 9, which connects the second ends of the first and second clamping parts. By locking the first and second clamping parts through the first locking pin 9, an acting force on the outer extension part of the engine pipe 1 and the outer extension part of the adapter ring 4 is generated, and the engine pipe 1 and the adapter ring 4 are clamped under the action of the ring groove inside the holding structure 2, thereby realizing the butt joint and sealing of the two.

[0047] As a person skilled in the art should understand, the ring groove inside the holding structure 2, i.e. the ring groove formed inside the first and second clamping parts, and as an optional embodiment, a chamfer is arranged outside the ring groove of the holding structure 2, which plays a guiding role for the outer extension part of the engine pipe 1 and the outer extension part of the adapter ring 4 entering the ring groove, or / and, a chamfer is arranged on the outer extension part of the engine pipe 1 and the outer extension part of the adapter ring 4, which also plays a guiding role. In addition, the ring groove of the holding structure 2 can be arranged inwardly inclined, so that the cross section is in the shape of "eight", which also plays a guiding role and has better adaptability.

[0048] In the embodiment, with reference to Figure 1 and Figure 2The connecting device further comprises an auxiliary positioning device used for being connected in the UAV body to fix the air inlet 5. The auxiliary positioning device comprises a support frame 7 used for being fixed in the UAV body, two pieces of the bandage 6, the first ends of which are connected to the support frame 7 respectively, the second ends of which are wrapped around the air inlet 5 to be clamped on the air inlet 5, and a second locking pin 11 connected to the second ends of the two pieces of the bandage 6.

[0049] Each locking pin comprises a bolt and a nut, and the tightening of the clamping structure 2 and the bandage 6 is realized by screwing the nut.

[0050] The connecting device provided by the application realizes the axial clamping of the engine pipeline 1, the sealing compression ring 3 and the adapter ring 4 through the radial displacement of the clamping structure 2, the sealing compression ring 3 plays a sealing role, thereby realizing the sealed connection between the engine pipeline 1 and the air inlet 5. The fixing seat 8 is connected with the UAV body, which reduces the vibration displacement of the engine pipeline 1 and the air inlet 5, and the auxiliary positioning device further realizes the fixing of the air inlet 5. Moreover, the connecting device of the application can be adapted to the engine pipelines 1 and air inlets 5 of different diameters caused by the installation of different models of engines, and has universality.

[0051] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between such entities or operations. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the phrase "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0052] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the present application, and are not limitations on the embodiments. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary or possible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A connection device between an air intake duct and an engine, characterized in that, The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

2. The air intake passage to engine connection device according to claim 1, characterized by, The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

3. The air intake passage to engine connection device according to claim 2, characterized by, The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

4. The air intake passage to engine connection apparatus according to claim 2, characterized by The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

5. The air intake passage to engine connection apparatus according to claim 1, characterized by The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

6. The air intake passage to engine connection apparatus according to claim 1, characterized by The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

7. The air intake passage to engine connection apparatus according to claim 1, characterized by The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

8. The air intake passage to engine connection apparatus according to claim 1, characterized by The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

9. The air intake passage to engine connection apparatus according to claim 1, characterized by The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed.

10. The air intake passage to engine connection apparatus according to claim 9, characterized by The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. The utility model relates to a kind of auxiliary positioning device for connecting in the unmanned aerial vehicle body, and the air inlet is fixed. 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