Rotor wing and helicopter

Abstract

The utility model relates to the field of helicopters, in particular to a rotor wing and a helicopter. The rotor wing comprises a propeller hub, a propeller blade and a wear-resistant gasket, the propeller hub comprises a clamping piece, the propeller blade is fixed to the clamping piece and comprises a body with a limiting platform and a positioning column, the positioning column is formed by extending from the limiting platform to the direction away from the body, the wear-resistant gasket is arranged on the positioning column in a sleeving mode, and the wear-resistant gasket is fixed to the body. And the wear-resistant gasket is clamped between the clamping piece and the limiting platform and is matched with the contact surface of the limiting platform. According to the rotor provided by the utility model, the friction force borne by the blades can be reduced, the abrasion to the blades is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of helicopters, and particularly relates to a rotor and a helicopter. Background Art

[0002] The blades of existing helicopters are assembled to the hub through hinges. The hub is driven by a motor to rotate, driving the blades to rotate to achieve flight. During takeoff and landing, there is a large friction force between the blades and the hub. Moreover, since the surface of the blade is not a flat surface but a streamline shape conducive to flight, the contact area between the blade and the hub is small, resulting in a large friction force between the blade and the hub, and the blade is prone to wear. Summary of the Utility Model

[0003] In order to solve the above technical problem of easy wear of the blade, the utility model provides a rotor and a helicopter, which can reduce the friction force received by the blade and reduce the wear of the blade.

[0004] A rotor includes a hub, a blade, and a wear-resistant gasket. The hub includes clamping pieces. The blade is fixed to the clamping pieces and includes a body having a limiting platform and a positioning post. The positioning post extends from the limiting platform in a direction away from the body. The wear-resistant gasket is sleeved on the positioning post and is clamped between the clamping piece and the limiting platform. The contact surface of the wear-resistant gasket matches the contact surface of the limiting platform.

[0005] In some embodiments, along the extending direction of the positioning post, the height of the wear-resistant gasket is higher than the height of the positioning post.

[0006] In some embodiments, the clamping piece includes a top and an abutting portion which are connected. The blade is fixed to the top. The wear-resistant gasket is clamped between the abutting portion and the limiting platform. Along the extending direction of the positioning post, the top is spaced from the positioning post.

[0007] In some embodiments, the cross-section of the clamping piece is arc-shaped.

[0008] In some embodiments, the limiting platform includes a first limiting platform and a second limiting platform, which are respectively arranged on opposite sides of the body. The positioning post includes a first positioning post and a second positioning post, which respectively extend from the first limiting platform and the second limiting platform in a direction away from the body. The wear-resistant gasket includes a first gasket and a second gasket, which are respectively sleeved on the first positioning post and the second positioning post. The clamping piece includes a first clamping piece and a second clamping piece which are oppositely arranged. The first gasket is clamped between the first clamping piece and the first limiting platform, and the second gasket is clamped between the second clamping piece and the second limiting platform.

[0009] In some embodiments, the wear-resistant gasket is a metal gasket.

[0010] In some embodiments, the wear-resistant gasket is a stainless-steel gasket.

[0011] In some embodiments, a fixing bolt is further included, and coaxial mounting holes are provided corresponding to the fixing bolt on the clip, the positioning post, the body, and the wear-resistant gasket.

[0012] In some embodiments, the fixing bolt includes a screw and a nut, and a receiving groove is provided on the clip corresponding to the nut.

[0013] A helicopter includes a fuselage and a rotor. The rotor is mounted on the fuselage. The rotor includes a hub, blades, and a wear-resistant gasket. The hub includes clips. The blades are fixed to the clips. It includes a body having a limiting platform and a positioning post. The positioning post extends from the limiting platform in a direction away from the body. The wear-resistant gasket is sleeved on the positioning post and is clamped between the clip and the limiting platform. The contact surface of the wear-resistant gasket matches the limiting platform.

[0014] Compared with the prior art, in the helicopter provided by the present utility model, the wear-resistant gasket 34 of the rotor is clamped between the limiting platform and the clip, avoiding direct friction between the blade and the hub. The contact surface of the wear-resistant gasket matches the limiting platform, increasing the contact area between the gasket and the limiting platform and reducing the pressure received by the blade. Thus, the wear of the blade can be effectively reduced.

[0015] The blade is provided with a positioning post. During assembly, the mounting holes of the gasket and the blade can be accurately aligned and will not shift, improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a three-dimensional assembly schematic diagram of a helicopter provided by the present utility model;

[0018] Figure 2 It is a three-dimensional assembly schematic diagram of a rotor provided by the first embodiment of the present utility model;

[0019] Figure 3 is Figure 2 a three-dimensional exploded schematic diagram and a partial enlarged view of the rotor shown;

[0020] Figure 4 is Figure 2 a cross-sectional view of the rotor shown;

[0021] Figure 5 a three-dimensional exploded view and a partial enlarged view of a rotor provided by the second embodiment of the present invention;

[0022] Figure 6 is Figure 5 a cross-sectional view and a partial enlarged view of the rotor shown. Specific embodiments

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] In the present invention, "at least one" means one or more, and "a plurality" means two or more. "At least one (item)" or its similar expression means any combination of these items, including any combination of single item (s) or plural item (s). For example, "at least one (item) of a, b or c", or, "at least one (item) of a, b and c" can all represent: a, b, c, a - b (i.e., a and b), a - c, b - c, or a - b - c, where a, b, c can be single or multiple respectively.

[0025] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a" and "the" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0026] The terms "first" and "second" are only used for descriptive purposes to distinguish objects such as substances from each other, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. For example, without departing from the scope of the embodiments of the present invention, the first XX can also be called the second XX, and similarly, the second XX can also be called the first XX. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0027] When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] Please refer to Figure 1 , which is a three-dimensional assembly schematic diagram of a helicopter provided by the present utility model. The helicopter 1 includes a fuselage 10 and a rotor. The rotor is installed on the fuselage 10 and rotates to generate pulling force and lifting force.

[0029] First Embodiment

[0030] Please refer to Figure 2 , which is a three-dimensional assembly schematic diagram of a rotor provided by the first embodiment of the present utility model. The rotor 20 includes a hub 21, blades 23, wear-resistant gaskets 24 and fixing bolts 26. The blades 23 are fixed to the hub 21 by the fixing bolts 26, and the wear-resistant gaskets 24 are clamped between the hub 21 and the blades 23.

[0031] The hub 21 includes clamping pieces, and the blades 23 are fixed to the clamping pieces.

[0032] Please refer to again Figure 3 , which is Figure 2 a three-dimensional exploded schematic diagram and a partial enlarged view of the rotor shown. In this embodiment, the clamping pieces include a first clamping piece 211 and a second clamping piece 212 which are oppositely arranged, and the blades 23 are fixed between the first clamping piece 211 and the second clamping piece 212.

[0033] In some embodiments, the clamping piece is tubular, and the blade is inserted into the clamping piece and fixed.

[0034] Please refer to again in combination with Figure 3 and Figure 4 , Figure 4 , which is Figure 2 a cross-sectional view of the rotor shown. The blade 23 is fixed to the clamping piece, and includes a body 231 having a limiting platform and a positioning post 233. The positioning post 233 extends from the limiting platform in a direction away from the body 231. Specifically, the limiting platform includes a first limiting platform 2311 and a second limiting platform 2312 which are oppositely arranged and are respectively disposed on opposite sides of the body 231. The positioning post 233 includes a first positioning post 2331 and a second positioning post 2332. The first positioning post 2331 extends from the first limiting platform 2311 in a direction away from the body 231, and the second positioning post 2332 extends from the second limiting platform 2312 in a direction away from the body 231.

[0035] The wear-resistant gasket 24 is sleeved on the positioning post 233 and is clamped between the clip and the limiting platform. The contact surface of the wear-resistant gasket 24 matches that of the limiting platform. Along the extending direction of the positioning post 233, the height of the wear-resistant gasket 24 is higher than that of the positioning post 233. Specifically, the wear-resistant gasket 24 includes a first gasket 241 and a second gasket 242. The first gasket 241 is sleeved on the first positioning post 2331 and is clamped between the first clip 211 and the first limiting platform 2311. The height of the first gasket 241 is higher than that of the first positioning post 2331. The second gasket 242 is sleeved on the second positioning post 2332 and is clamped between the second clip 212 and the second limiting platform 2312. The height of the second gasket 242 is higher than that of the second positioning post 2332.

[0036] Among them, the wear-resistant gasket 24 can be a metal gasket, specifically a stainless-steel gasket.

[0037] The fixing bolt 26 includes a screw 261 and a nut 262. The clip, the positioning post 233, and the wear-resistant gasket 24 are provided with coaxial mounting holes 27 corresponding to the screw 261, and the clip is provided with a receiving groove 215 corresponding to the nut 262.

[0038] Compared with the prior art, the wear-resistant gasket 24 of the rotor 20 provided by the present utility model is clamped between the limiting platform and the clip, and the contact surface of the wear-resistant gasket 24 matches that of the limiting platform. On the one hand, the wear-resistant gasket 24 is arranged between the limiting platform and the clip to avoid direct friction between the blade 23 and the hub 21. On the other hand, the contact surface of the wear-resistant gasket 24 is set to match that of the limiting platform, increasing the contact area between the wear-resistant gasket 24 and the limiting platform and reducing the pressure received by the blade 23. Thus, the wear of the blade 23 can be effectively reduced.

[0039] The blade 23 is provided with a positioning post 233, and the wear-resistant gasket 24 is sleeved on the positioning post 233. During assembly, the mounting holes 27 of the wear-resistant gasket 24 and the blade 23 can be accurately aligned and will not shift, improving the assembly efficiency. And along the extending direction of the positioning post 233, the height of the wear-resistant gasket 24 is higher than that of the positioning post 233, avoiding contact between the blade 23 and the hub 21 and reducing the wear of the blade 23.

[0040] Second Embodiment

[0041] Please refer to Figure 5, which is a three-dimensional exploded view and partial enlarged view of a rotor provided by the second embodiment of the present utility model. The rotor 30 includes a hub 31, blades 33, wear-resistant gaskets 34 and fixing bolts 36. The blades 33 are fixed to the hub 31 by the fixing bolts 36, and the wear-resistant gaskets 34 are clamped between the hub 31 and the blades 33.

[0042] The hub 31 includes clamping pieces, and the blades 33 are fixed to the clamping pieces.

[0043] Please refer to Figure 6 , for Figure 5 The sectional view and partial enlarged view of the rotor shown. In this embodiment, the clamping pieces include a first clamping piece 311 and a second clamping piece 312 which are oppositely arranged, and the blades 33 are fixed between the first clamping piece 311 and the second clamping piece 312. The first clamping piece 311 and the second clamping piece 312 include a top 3111 and an abutting portion 3112 which are connected.

[0044] The blade 33 is fixed to the top 3111, and includes a body 331 having a limiting platform and positioning posts 333. The positioning posts 333 extend from the limiting platform in a direction away from the body 331. Specifically, the limiting platform includes a first limiting platform 3311 and a second limiting platform 3312 which are oppositely arranged and are respectively disposed on opposite sides of the body 331. The positioning posts 333 include a first positioning post 3331 and a second positioning post 3332. The first positioning post 3331 extends from the first limiting platform 3311 in a direction away from the body 331, and the second positioning post 3332 extends from the second limiting platform 3312 in a direction away from the body 331.

[0045] The wear-resistant gasket 34 is sleeved on the positioning post 333 and is clamped between the abutting portion 3112 and the limiting platform. The contact surface of the wear-resistant gasket 34 matches the limiting platform. Along the extending direction of the positioning post 333, the top 3111 and the positioning post are spaced apart. Specifically, the wear-resistant gasket 34 includes a first gasket 341 and a second gasket 342. The first gasket 341 is sleeved on the first positioning post 3331 and is clamped between the abutting portion 3112 of the first clamping piece 311 and the first limiting platform 3311. The top 3111 of the first clamping piece 311 is spaced apart from the first positioning post 3331. The second gasket 342 is sleeved on the second positioning post 3332 and is clamped between the abutting portion 3112 of the second clamping piece 312 and the second limiting platform 3312. The top 3111 of the second clamping piece 312 is spaced apart from the second positioning post 3332.

[0046] It can be understood that the cross-section of the clamping piece can be arc-shaped.

[0047] It can also be understood that along the extension direction of the positioning post 333, the height of the wear-resistant gasket 34 can be lower than or higher than the height of the positioning post 333, or can be the same as the height of the positioning post 333.

[0048] Among them, the wear-resistant gasket 34 can be a metal gasket, specifically a stainless steel gasket.

[0049] The fixing bolt 36 includes a screw 361 and a nut 362. The clamping piece, the positioning post 333 and the wear-resistant gasket 34 are provided with coaxial mounting holes 37 corresponding to the screw 361, and the clamping piece is provided with a receiving groove 315 corresponding to the nut 362.

[0050] Compared with the prior art, the wear-resistant gasket 34 of the rotor 30 provided by the present utility model is clamped between the limiting platform and the clamping piece, and the contact surface of the wear-resistant gasket 34 matches the contact surface of the limiting platform. On the one hand, the wear-resistant gasket 34 is arranged between the limiting platform and the clamping piece to avoid direct friction between the blade 33 and the hub 31. On the other hand, the contact surface of the wear-resistant gasket 34 is set to match the contact surface of the limiting platform, increasing the contact area between the wear-resistant gasket 34 and the limiting platform and reducing the pressure received by the blade 33. Thus, the wear of the blade 33 can be effectively reduced.

[0051] The blade 33 is provided with a positioning post 333. During assembly, the mounting holes 37 of the wear-resistant gasket 34 and the blade 33 can be accurately aligned and will not shift, improving the assembly efficiency. And along the extension direction of the positioning post 333, the top 3111 is arranged at a distance from the positioning post 333 to avoid contact between the blade 33 and the hub 31 and reduce the wear of the blade 33.

[0052] The above are only some embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model specification and drawings, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A rotor, characterized in that, Comprising: A hub, including clamping pieces; Blades, fixed to the clamping pieces, including a body having a limiting platform and positioning posts, the positioning posts extending from the limiting platform away from the body; Wear-resistant gaskets, sleeved on the positioning posts, clamped between the clamping pieces and the limiting platforms, and the contact surfaces of the wear-resistant gaskets match the limiting platforms.

2. The rotor according to claim 1, characterized in that Along the extending direction of the positioning posts, the height of the wear-resistant gaskets is higher than that of the positioning posts.

3. The rotor according to claim 1, wherein The clamping pieces include a top and an abutting part connected together, the blades are fixed to the top, the wear-resistant gaskets are clamped between the abutting part and the limiting platforms, and along the extending direction of the positioning posts, the top is spaced from the positioning posts.

4. The rotor according to claim 1, wherein The cross-section of the clamping pieces is arc-shaped.

5. The rotor according to claim 1, wherein The limiting platforms include a first limiting platform and a second limiting platform, respectively arranged on opposite sides of the body, the positioning posts include a first positioning post and a second positioning post, respectively extending from the first limiting platform and the second limiting platform away from the body, the wear-resistant gaskets include a first gasket and a second gasket, respectively sleeved on the first positioning post and the second positioning post, the clamping pieces include a first clamping piece and a second clamping piece arranged oppositely, the first gasket is clamped between the first clamping piece and the first limiting platform, and the second gasket is clamped between the second clamping piece and the second limiting platform.

6. The rotor according to claim 1, wherein, The wear-resistant gaskets are metal gaskets.

7. The rotor according to claim 1, wherein, The wear-resistant gaskets are stainless steel gaskets.

8. The rotor according to claim 1, characterized in that, It further includes fixing bolts, and the clamping pieces, the positioning posts, the body and the wear-resistant gaskets are provided with coaxial mounting holes corresponding to the fixing bolts.

9. The rotor according to claim 8, characterized in that, The fixing bolts include screws and nuts, and the clamping pieces are provided with receiving grooves corresponding to the nuts.

10. A helicopter, characterized in that, Including a fuselage and a rotor, the rotor is mounted on the fuselage, and the rotor is any one of the rotors according to claims 1-9.

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