A centrifugal clutch pulley arrangement for an unmanned helicopter

Abstract

The utility model relates to an unmanned helicopter centrifugal clutch pulley wheel device, including driving piece, centrifugal piece and driven piece, driving piece is used for with the output end transmission connection of engine, centrifugal piece includes a plurality of flinger that is uniformly distributed in the outer periphery of driving piece, and the elastic member is arranged between flinger and driving piece, and / or, the elastic member is arranged between adjacent two flingers, driven piece is coaxial with driving piece and rotatably sets up in centrifugal piece outside, and driven piece coaxially connected has pulley, and driven piece is used for engaging with flinger when flinger is thrown out under the centrifugal force effect of flinger. The above -mentioned device can separate transmission system and engine when engine speed is lower, reduces the load that engine bears, makes transmission system and engine engage after engine speed rises and stabilizes, can avoid engine sudden flameout, cylinder and so on, prevent engine damage, and avoid the problem that the sudden impact that engine starts produces makes rotor etc. moving part damaged.

Description

Technical Field

[0001] This utility model relates to the field of power transmission technology for unmanned helicopters, and in particular to a centrifugal clutch pulley device for unmanned helicopters. Background Technology

[0002] In this era of rapid development of unmanned helicopters, their performance is becoming increasingly superior. This, in turn, places higher demands on the overall weight and structure of the aircraft.

[0003] The role of a lightweight centrifugal clutch pulley device in unmanned helicopters is mainly reflected in the following aspects: Firstly, due to the large inertia of the rotor blades, the power output of piston engines or fixed turbine engines is relatively small during the period from ignition to reaching a certain speed, and they can only transmit a small torsional torque, which cannot bear the load. Therefore, how to design a clutch device that can disconnect the transmission system from the engine when the engine starts, avoiding sudden engine shutdown, engine seizure, and other phenomena, preventing engine damage, and avoiding damage to moving parts such as the rotor caused by the strong impact generated during engine startup, has become an important technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this utility model is to provide a centrifugal clutch pulley device for unmanned helicopters, so that it can disconnect the transmission system from the engine when the engine starts, thereby avoiding sudden engine shutdown, engine cylinder blockage, and other phenomena, preventing engine damage, and avoiding damage to moving parts such as rotors caused by the strong impact generated when the engine starts.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A centrifugal clutch pulley device for unmanned helicopters includes:

[0007] The driving component is used for transmission connection with the output end of the engine;

[0008] The centrifugal component includes a plurality of circumferentially distributed throwing blocks around the outer periphery of the active component. An elastic element is provided between the throwing blocks and the active component, and / or an elastic element is provided between two adjacent throwing blocks. The elastic element is used to apply a force to the throwing blocks to make them move toward the active component.

[0009] The driven member is coaxial with the driving member and rotatably sleeved outside the centrifugal member. The driven member is coaxially connected to a pulley. The driven member is used to engage with the throwing block when the throwing block is subjected to centrifugal force and moves radially away from the driving member to a preset position.

[0010] In one embodiment of this application, the driving component includes a coupling and a drive shaft connected coaxially, the end of the coupling away from the drive shaft is used for transmission connection with the output end of the engine, and the centrifugal component is disposed on the drive shaft.

[0011] In one embodiment of this application, the drive shaft includes:

[0012] A shaft body, which is coaxially connected to the coupling;

[0013] The rotor is sleeved on the shaft body and the rotor and the shaft body are in a non-rotating fit. The centrifugal element is disposed outside the rotor. One of the centrifugal element and the rotor is provided with a sliding groove. The other of the centrifugal element and the rotor is provided with a slider. The slider is in a sliding fit with the sliding groove.

[0014] In one embodiment of this application, the shaft includes:

[0015] The main body includes a first shaft segment and a second shaft segment arranged coaxially. The diameter of the first shaft segment is larger than the diameter of the second shaft segment. An annular limiting step surface is formed between the first shaft segment and the second shaft segment. The end of the first shaft segment away from the second shaft segment is coaxially connected to the coupling.

[0016] A shaft end washer is detachably disposed at the end of the second shaft segment away from the first shaft segment. The rotor is anti-rotatingly engaged with the second shaft segment, and the shaft end washer engages with the annular limiting step surface to clamp the rotor, thereby axially limiting the rotor.

[0017] In one embodiment of this application, the driven member includes a housing, a first end cap, and a second end cap. The first end cap and the second end cap are detachably disposed at both axial ends of the housing. The first end cap and the second end cap are rotatably engaged with the drive shaft. The housing, the first end cap, the second end cap, and the drive shaft form an annular space for accommodating the centrifugal member. The inner circumferential surface of the housing is used to engage with the sling block.

[0018] In one embodiment of this application, the first end cap is located on the side of the driven member near the coupling, the first end cap is connected to the pulley, and the pulley is coaxially arranged around the coupling.

[0019] In one embodiment of this application, it further includes:

[0020] A first bearing mounting component is sleeved on the end of the first end cover that is connected to the pulley, and / or the first bearing mounting component is sleeved on the end of the pulley that is connected to the first end cover;

[0021] The second bearing mounting component is sleeved on the end of the second end cover away from the housing;

[0022] The first bearing has an inner ring fitted onto the end of the first end cover that is connected to the pulley, and / or the inner ring of the first bearing is fitted onto the end of the pulley that is connected to the first end cover, and the outer ring of the first bearing is fitted into the first bearing mounting component.

[0023] The second bearing has its inner ring fitted onto the end of the second end cap away from the housing, and its outer ring is fitted with the second bearing mounting component.

[0024] In one embodiment of this application, the first bearing mounting component includes a first bearing sleeve and a first bearing cover. The first bearing sleeve and the first bearing cover are detachably connected, and the first bearing sleeve and the first bearing cover form a first annular limiting groove for axially limiting the outer ring of the first bearing. The first end cover cooperates with the pulley to form a second annular limiting groove for axially limiting the inner ring of the first bearing.

[0025] The second bearing mounting component includes a second bearing sleeve and a second bearing cover. The second bearing sleeve and the second bearing cover are detachably connected, and the second bearing sleeve and the second bearing cover form a third annular limiting groove for axially limiting the outer ring of the second bearing. The second bearing cover and the second end cover cooperate to form a fourth annular limiting groove for axially limiting the inner ring of the second bearing.

[0026] In one embodiment of this application, a reinforcing link is further included, the two ends of which are respectively connected to the first bearing mounting component and the second bearing mounting component.

[0027] In one embodiment of this application, the first bearing mounting component is provided with a pair of earrings, two first mounting seats are evenly distributed circumferentially on the outer peripheral surface of the first bearing mounting component, two second mounting seats are evenly distributed circumferentially on the outer peripheral surface of the second bearing mounting component, a connecting plate is provided between adjacent first mounting seats and second mounting seats, and a position-adjustable slider is provided on the connecting plate.

[0028] As can be seen from the above technical solution, this utility model discloses a centrifugal clutch pulley device for unmanned helicopters. The centrifugal clutch pulley device for unmanned helicopters includes a driving component, a centrifugal component, and a driven component. The driving component is used for transmission connection with the output end of the engine. The centrifugal component includes multiple circumferentially distributed throwing blocks on the outer periphery of the driving component. An elastic element is provided between the throwing blocks and the driving component, and / or an elastic element is provided between two adjacent throwing blocks. The elastic element is used to apply a force to the throwing blocks to make them move closer to the driving component. The driven component is coaxial with the driving component and rotatably sleeved on the outside of the centrifugal component. The driven component is coaxially connected to a pulley. The driven component is used to engage with the throwing blocks when the throwing blocks are radially away from the driving component to a preset position under the action of centrifugal force.

[0029] When the engine is first started, the speed is low, which drives the driving component to rotate at a low speed. At this time, the centrifugal force generated is insufficient for the throwing block to overcome the force of the elastic component, and the throwing block remains close to the driving component. As the engine speed increases, the speed of the driving component also increases, and the centrifugal force generated causes the throwing block to overcome the elastic component and move away from the driving component until the speed of the driving component increases to the point that the throwing block engages with the driven component, thus realizing the power engagement between the driving component and the driven component.

[0030] It is evident that the centrifugal clutch pulley device of the unmanned helicopter can separate the transmission system and the engine when the engine is just started and the speed is low, reducing the load on the engine. After the engine speed increases and stabilizes, the transmission system engages with the engine, which can prevent the engine from suddenly shutting down, jamming, or other phenomena, thus preventing engine damage and avoiding damage to moving parts such as the rotor caused by the sudden impact generated when the engine starts. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the structure of the centrifugal clutch pulley device for an unmanned helicopter provided in an embodiment of this utility model;

[0033] Figure 2 A side view of the centrifugal clutch pulley device for an unmanned helicopter provided in an embodiment of this utility model;

[0034] Figure 3 A bottom view of the centrifugal clutch pulley device for an unmanned helicopter provided in an embodiment of this utility model;

[0035] Figure 4 A longitudinal sectional view of the centrifugal clutch pulley device for an unmanned helicopter provided in an embodiment of this utility model;

[0036] Figure 5 A cross-sectional schematic diagram of the centrifugal clutch pulley device for an unmanned helicopter provided in an embodiment of this utility model.

[0037] In the picture:

[0038] 1 is the driving component; 110 is the coupling; 120 is the driving shaft; 121 is the main body; 122 is the shaft end washer; 123 is the rotor; 2 is the driven component; 210 is the housing; 220 is the first end cover; 230 is the second end cover; 3 is the throwing block; 4 is the pulley; 5 is the first bearing mounting component; 510 is the first bearing sleeve; 520 is the first bearing cover; 6 is the second bearing mounting component; 610 is the second bearing sleeve; 620 is the second bearing cover; 7 is the reinforcing connecting rod; 701 is the main body rod; 702 is the connecting part; 8 is the ear; 801 is the base part; 802 is the ring part; 9 is the first mounting seat; 10 is the second mounting seat; 11 is the connecting plate; 12 is the slider; 13 is the rotating support bearing; 14 is the first bearing; 15 is the second bearing; 16 is the elastic component. Detailed Implementation

[0039] The core of this utility model is to provide a centrifugal clutch pulley device for unmanned helicopters. The structural design of this centrifugal clutch pulley device enables it to disconnect the transmission system from the engine when the engine starts, avoiding sudden engine shutdown, engine cylinder blockage, and other phenomena, preventing engine damage, and avoiding damage to moving parts such as rotors caused by the strong impact generated when the engine starts.

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Please see Figures 1 to 4 .

[0042] This utility model discloses a centrifugal clutch pulley device for unmanned helicopters, which includes a driving component 1, a centrifugal component, and a driven component 2.

[0043] Among them, the active component 1 is used for transmission connection with the output end of the engine.

[0044] The centrifugal component includes multiple circumferentially distributed throwing blocks 3 around the outer periphery of the active component 1. An elastic element 16 is provided between the throwing blocks 3 and the active component 1, and / or an elastic element 16 is provided between two adjacent throwing blocks 3. The elastic element 16 is used to apply a force to the throwing blocks 3 to make the throwing blocks 3 move closer to the active component 1. That is, the throwing blocks 3 can be set on the active component 1 through the elastic element 16, or adjacent throwing blocks 3 can be connected through the elastic element 16. The elastic element 16 applies a force to the two connected throwing blocks 3, making the throwing blocks 3 tend to move closer to the active component 1. Alternatively, the throwing blocks 3 can be set on the active component 1 through the elastic element 16, and adjacent throwing blocks 3 can be connected through the elastic element 16.

[0045] like Figure 4 and Figure 5 As shown, in one specific embodiment of this application, the centrifugal component includes two swing blocks 3, and the two ends of the two swing blocks 3 are connected by tension springs.

[0046] The driven member 2 is coaxial with the driving member 1 and rotatably sleeved outside the centrifugal member. The driven member 2 is coaxially connected to the pulley 4. The driven member 2 is used to engage with the swing block 3 when the swing block 3 is subjected to centrifugal force and moves radially away from the driving member 1 to a preset position.

[0047] The aforementioned active component 1, centrifugal component, and driven component 2 can be made of materials with a certain strength as needed, such as steel, engineering plastics, aerospace aluminum alloys, etc. In a preferred embodiment of this case, the active component 1, centrifugal component, and driven component 2 are made of aerospace aluminum alloys. Compared with steel, while meeting the strength requirements, the weight is significantly reduced, thus meeting the lightweight requirements of unmanned helicopters for their own components.

[0048] When the engine is first started, the speed is low, which drives the active component 1 to rotate at a low speed. At this time, the centrifugal force generated is insufficient for the throwing block 3 to overcome the force of the elastic component 16. The throwing block 3 remains close to the active component 1. When the engine speed increases, the speed of the active component 1 also increases. The centrifugal force generated causes the throwing block 3 to overcome the elastic component 16 and move away from the active component 1 until the speed of the active component 1 increases to the point that the throwing block 3 engages with the driven component 2, thus realizing the power engagement between the active component 1 and the driven component 2.

[0049] Compared with the prior art, the centrifugal clutch pulley device for unmanned helicopters provided in this embodiment of the utility model can separate the transmission system and the engine when the engine is just started and the speed is low, thereby reducing the load on the engine. After the engine speed increases and stabilizes, the transmission system is engaged with the engine. This can avoid phenomena such as sudden engine shutdown and engine blockage, prevent engine damage, and avoid the problem of damage to moving parts such as rotor caused by sudden impact during engine start-up.

[0050] like Figure 4As shown, in one embodiment of this application, the active component 1 mainly consists of two parts: the active component 1 includes a coupling 110 and a drive shaft 120 connected coaxially. The end of the coupling 110 away from the drive shaft 120 is used for transmission connection with the output end of the engine. The centrifugal component is disposed on the drive shaft 120. The torque of the engine is transmitted to the drive shaft 120 through the coupling 110 and then to the centrifugal component through the drive shaft 120.

[0051] like Figure 4 and Figure 5 As shown, the drive shaft 120 includes a shaft body and a rotor 123. The shaft body is coaxially connected to the coupling 110. The rotor 123 is sleeved outside the shaft body and has an anti-rotation fit between the rotor 123 and the shaft body. The centrifugal element is disposed outside the rotor 123. One of the centrifugal element and the rotor 123 is provided with a sliding groove, and the other of the centrifugal element and the rotor 123 is provided with a slider 12. The slider 12 is slidably engaged with the sliding groove. The sliding groove and the slider 12 cooperate to limit the centrifugal element and maintain its stability.

[0052] Specifically, in one embodiment of this application, a groove is provided on the outer peripheral surface of the rotor 123, and a slider 12 is provided on the throwing block 3. The throwing block 3 slides and engages with the groove through the slider 12.

[0053] like Figure 4 As shown, the shaft includes a main body 121 and a shaft end washer 122. The main body 121 includes a first shaft segment and a second shaft segment coaxially arranged. The diameter of the first shaft segment is larger than the diameter of the second shaft segment. An annular limiting step surface is formed between the first shaft segment and the second shaft segment. The end of the first shaft segment away from the second shaft segment is coaxially connected to the coupling 110. The shaft end washer 122 is detachably arranged at the end of the second shaft segment away from the first shaft segment. The rotor 123 is anti-rotationally engaged with the second shaft segment, and the shaft end washer 122 engages with the annular limiting step surface to clamp the rotor 123, thereby axially limiting the rotor 123.

[0054] The rotor 123 is connected to the second shaft section by a flat key or spline to achieve a non-rotational fit between them.

[0055] like Figure 1 and Figure 4 As shown, the driven member 2 includes a housing 210, a first end cover 220 and a second end cover 230. The first end cover 220 and the second end cover 230 are detachably disposed at both axial ends of the housing 210. The first end cover 220 and the second end cover 230 are rotatably engaged with the drive shaft 120. The housing 210, the first end cover 220, the second end cover 230 and the drive shaft 120 form an annular space for accommodating the centrifugal member. The inner circumferential surface of the housing 210 is used to engage with the sling block 3.

[0056] The inner hole edge of the first end cover 220 and the inner hole edge of the second end cover 230 are respectively rotatably engaged with the drive shaft 120 through the rotational support bearing 13. That is, the outer ring of the rotational support bearing 13 is engaged with the first end cover 220 or the second end cover 230, and the inner ring of the rotational support bearing 13 is engaged with the drive shaft 120.

[0057] like Figure 4 As shown, the first end cover 220 is located on the side of the driven member 2 near the coupling 110. The first end cover 220 is connected to the pulley 4. The pulley 4 is coaxially arranged around the coupling 110. By arranging the pulley 4 around the coupling 110, the axial dimension of the centrifugal clutch pulley device of the unmanned helicopter can be shortened, which is convenient for miniaturization.

[0058] The centrifugal clutch pulley assembly for unmanned helicopters also includes a first bearing mounting component 5, a second bearing mounting component 6, a first bearing 14, and a second bearing 15. The first bearing mounting component 5 is sleeved on the outside of the end of the first end cover 220 connected to the pulley 4, and / or, the first bearing mounting component 5 is sleeved on the outside of the end of the pulley 4 connected to the first end cover 220. The second bearing mounting component 6 is sleeved on the outside of the end of the second end cover 230 away from the housing 210. The inner ring of the first bearing 14 is sleeved on the end of the first end cover 220 connected to the pulley 4, and / or, the inner ring of the first bearing 14 is sleeved on the end of the pulley 4 connected to the first end cover 220. At one end of the cover 220, the outer ring of the first bearing 14 is fitted with the first bearing mounting member 5, and the inner ring of the second bearing 15 is fitted onto the end of the second end cover 230 away from the housing 210. The outer ring of the second bearing 15 is fitted with the second bearing mounting member 6. The first bearing mounting member 5 provides rotational support for the pulley 4 and / or the first end cover 220 through the first bearing 14, and the second bearing mounting member 6 provides rotational support for the second end cover 230 through the second bearing 15, so as to improve the stability of the pulley 4 and the driven member 2 composed of the first end cover 220, the second end cover 230 and the housing 210 during rotation.

[0059] Specifically, such as Figure 4 As shown, the first bearing mounting component 5 consists of two parts, including a first bearing sleeve 510 and a first bearing cover 520. The first bearing sleeve 510 and the first bearing cover 520 are detachably connected, and the first bearing sleeve 510 and the first bearing cover 520 form a first annular limiting groove for axially limiting the outer ring of the first bearing 14. The first end cover 220 cooperates with the pulley 4 to form a second annular limiting groove for axially limiting the inner ring of the first bearing 14, ensuring the axial stability of the first bearing 14.

[0060] The second bearing mounting component 6 includes a second bearing 15 sleeve 610 and a second bearing 15 cover 620. The second bearing 15 sleeve 610 and the second bearing 15 cover 620 are detachably connected, and the second bearing 15 sleeve 610 and the second bearing 15 cover 620 form a third annular limiting groove for axially limiting the outer ring of the second bearing 15. The second bearing 15 cover 620 cooperates with the second end cover 230 to form a fourth annular limiting groove for axially limiting the inner ring of the second bearing 15, ensuring the axial stability of the second bearing 15.

[0061] To improve the overall strength of the centrifugal clutch pulley assembly for unmanned helicopters, the assembly also includes a reinforcing link 7. The two ends of the reinforcing link 7 are connected to the first bearing mounting component 5 and the second bearing mounting component 6, respectively. Two reinforcing links 7 are provided, and the two reinforcing links 7 are evenly distributed along the circumference, so as to achieve a uniform reinforcement effect while avoiding interference with the overall assembly of the centrifugal clutch pulley assembly for unmanned helicopters.

[0062] like Figure 1 and Figure 4 As shown, the reinforcing link 7 includes a main rod portion 701 and connecting portions 702 located at both ends of the main rod portion 701, so that the reinforcing link 7 forms a U-shaped structure. The two connecting portions 702 are respectively connected to the first bearing mounting component 5 and the second bearing mounting component 6, so that the first bearing mounting component 5 and the second bearing mounting component 6 are connected and fixed to each other through the reinforcing link 7, thereby improving the overall strength of the centrifugal clutch pulley device of the unmanned helicopter.

[0063] like Figure 1 and Figure 5 As shown, in one embodiment of this application, the first bearing mounting component 5 is provided with a pair of earrings 8, and two first mounting seats 9 are evenly distributed along the circumferential direction on the outer peripheral surface of the first bearing mounting component 5. Two second mounting seats 10 are evenly distributed along the circumferential direction on the outer peripheral surface of the second bearing mounting component 6. A connecting plate 11 is provided between adjacent first mounting seats 9 and second mounting seats 10, and a position-adjustable slider 12 is provided on the connecting plate 11.

[0064] The two reinforcing rods 7 are located between a pair of earrings 8, and the pair of earrings 8 are symmetrically arranged about the reinforcing rod 7. The other reinforcing rod 7 is arranged on the side of the first bearing mounting component 5 and the second bearing mounting component 6 away from the earrings 8, so as to make reasonable use of space and avoid affecting the overall assembly of the centrifugal clutch pulley device of the unmanned helicopter.

[0065] The slider 12 is used to adjust the position of the centrifugal clutch pulley device of the unmanned helicopter on the fuselage of the unmanned helicopter, so as to facilitate the installation and fixation of the centrifugal clutch pulley device of the unmanned helicopter on the fuselage of the unmanned helicopter. The lug 8 is connected to the first end of the connecting rod (not shown in the figure), and the second end of the connecting rod is connected to the reducer of the unmanned helicopter. The reducer is fixed in position on the fuselage of the unmanned helicopter. By adjusting the length of the connecting rod, the position adjustment of the centrifugal clutch pulley device of the unmanned helicopter is completed, thereby changing the center distance between the pulley 4 of the centrifugal clutch pulley device of the unmanned helicopter and the pulley on the reducer, thereby adjusting the belt tension.

[0066] Furthermore, the connecting rod provides support, ensuring that the distance between the centrifugal clutch pulley device and the reducer of the unmanned helicopter remains unchanged. In addition, the connecting rod and the slider work together to achieve stable fixation of the centrifugal clutch pulley device of the unmanned helicopter, thereby ensuring that the tension of the belt between the two remains unchanged.

[0067] Specifically, such as Figure 1 , Figure 2 and Figure 5 As shown, the earring 8 includes a base portion 801 and two ring portions 802 symmetrically arranged on the base portion 801. The two ring portions 802 are used to connect the connecting rod. The base portion 801 is fixed on the first bearing mounting member 5, and the ring portions 802 on the two earrings 8 are coaxially arranged.

[0068] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0069] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0070] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0071] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A centrifugal clutch pulley device for an unmanned helicopter, characterized in that, include: The driving component (1) is used for transmission connection with the output end of the engine; The centrifugal component includes multiple circumferentially distributed throwing blocks (3) around the outer periphery of the active component (1), with an elastic element (16) provided between the throwing blocks (3) and the active component (1), and / or, an elastic element (16) provided between two adjacent throwing blocks (3), the elastic element (16) being used to apply a force to the throwing blocks (3) to make the throwing blocks (3) move toward the active component (1); The driven member (2) is coaxial with the active member (1) and rotatably sleeved outside the centrifugal member. The driven member (2) is coaxially connected to a pulley (4). The driven member (2) is used to engage with the throwing block (3) when the throwing block (3) is subjected to centrifugal force and moves radially away from the active member (1) to a preset position.

2. The centrifugal clutch pulley device for unmanned helicopters according to claim 1, characterized in that, The driving component (1) includes a coupling (110) and a drive shaft (120) connected coaxially. The end of the coupling (110) away from the drive shaft (120) is used for transmission connection with the output end of the engine. The centrifugal component is disposed on the drive shaft (120).

3. The centrifugal clutch pulley device for unmanned helicopters according to claim 2, characterized in that, The drive shaft (120) includes: A shaft body, which is coaxially connected to the coupling (110); The rotor (123) is sleeved on the shaft body and the rotor (123) and the shaft body are in a non-rotating fit. The centrifugal component is disposed outside the rotor (123). One of the centrifugal component and the rotor (123) is provided with a sliding groove. The other of the centrifugal component and the rotor (123) is provided with a slider (12). The slider (12) is in a sliding fit with the sliding groove.

4. The centrifugal clutch pulley device for unmanned helicopters according to claim 3, characterized in that, The shaft includes: The main body (121) includes a first shaft segment and a second shaft segment arranged coaxially. The diameter of the first shaft segment is larger than the diameter of the second shaft segment. An annular limiting step surface is formed between the first shaft segment and the second shaft segment. The end of the first shaft segment away from the second shaft segment is coaxially connected to the coupling (110). A shaft end washer (122) is detachably disposed at the end of the second shaft segment away from the first shaft segment. The rotor (123) is anti-rotatingly engaged with the second shaft segment, and the shaft end washer (122) engages with the annular limiting step surface to clamp the rotor (123) to axially limit the rotor (123).

5. The centrifugal clutch pulley device for unmanned helicopters according to any one of claims 2-4, characterized in that, The driven member (2) includes a housing (210), a first end cap (220) and a second end cap (230). The first end cap (220) and the second end cap (230) are detachably disposed at both ends of the axial direction of the housing (210). The first end cap (220) and the second end cap (230) are rotatably engaged with the drive shaft (120). The housing (210), the first end cap (220), the second end cap (230) and the drive shaft (120) form an annular space for accommodating the centrifugal member. The inner circumferential surface of the housing (210) is used to engage with the sling block (3).

6. The centrifugal clutch pulley device for unmanned helicopters according to claim 5, characterized in that, The first end cap (220) is located on the side of the driven member (2) near the coupling (110). The first end cap (220) is connected to the pulley (4), which is coaxially arranged around the coupling (110) with the coupling (110).

7. The centrifugal clutch pulley device for unmanned helicopters according to claim 6, characterized in that, Also includes: The first bearing mounting component (5) is sleeved on the outside of the end of the first end cover (220) connected to the pulley (4), and / or the first bearing mounting component (5) is sleeved on the outside of the end of the pulley (4) connected to the first end cover (220); The second bearing mounting component (6) is sleeved on the end of the second end cap (230) away from the housing (210); The first bearing (14) has its inner ring fitted on the end of the first end cover (220) connected to the pulley (4), and / or the inner ring of the first bearing (14) is fitted on the end of the pulley (4) connected to the first end cover (220), and the outer ring of the first bearing (14) is fitted with the first bearing mounting component (5). The second bearing (15) has its inner ring fitted onto the end of the second end cap (230) away from the housing (210), and its outer ring is fitted with the second bearing mounting member (6).

8. The centrifugal clutch pulley device for unmanned helicopters according to claim 7, characterized in that, The first bearing mounting component (5) includes a first bearing sleeve (510) and a first bearing cover (520). The first bearing sleeve (510) and the first bearing cover (520) are detachably connected. The first bearing sleeve (510) and the first bearing cover (520) form a first annular limiting groove for axially limiting the outer ring of the first bearing (14). The first end cover (220) cooperates with the pulley (4) to form a second annular limiting groove for axially limiting the inner ring of the first bearing (14). The second bearing mounting component (6) includes a second bearing sleeve (610) and a second bearing cover (620). The second bearing sleeve (610) and the second bearing cover (620) are detachably connected. The second bearing sleeve (610) and the second bearing cover (620) form a third annular limiting groove for axially limiting the outer ring of the second bearing (15). The second bearing cover (620) and the second end cover (230) cooperate to form a fourth annular limiting groove for axially limiting the inner ring of the second bearing (15).

9. The centrifugal clutch pulley device for unmanned helicopters according to claim 7, characterized in that, It also includes a reinforcing link (7), the two ends of which are connected to the first bearing mounting component (5) and the second bearing mounting component (6), respectively.

10. The centrifugal clutch pulley device for unmanned helicopters according to claim 7, characterized in that, The first bearing mounting component (5) is provided with a pair of earrings (8). Two first mounting seats (9) are evenly distributed along the circumferential direction on the outer peripheral surface of the first bearing mounting component (5). Two second mounting seats (10) are evenly distributed along the circumferential direction on the outer peripheral surface of the second bearing mounting component (6). A connecting plate (11) is provided between adjacent first mounting seats (9) and second mounting seats (10). An adjustable slider (12) is provided on the connecting plate (11).

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