Folding paddle assembly and aircraft

Abstract

The utility model provides a folding paddle subassembly and aircraft, folding paddle subassembly includes paddle clip, paddle blade, two hard pad, first magnetic piece, second magnetic piece, paddle clip is equipped with the clamping part, the clamping part includes the clamping arm that sets up oppositely, paddle blade is rotatingly clamped between the two clamping arm, the first magnetic piece is equipped with the first magnetic piece, the second magnetic piece is equipped with the second magnetic piece, and the second magnetic piece is equipped with the second magnetic piece. The two hard gaskets are rotationally clamped between the paddle and the two clamping arms respectively, the two hard gaskets and the paddle rotate coaxially and synchronously, the middle area of one hard gasket and the adjacent clamping arm are kept in a non-contact state, the first magnetic piece is arranged between the corresponding hard gasket and the corresponding clamping arm, and the second magnetic piece is arranged between the corresponding hard gasket and the corresponding clamping arm. The second magnetic sheets are arranged between the first magnetic sheets and the corresponding clamping arms, the second magnetic sheets are used for generating magnetic repulsive force on the first magnetic sheets, and under the action of the magnetic repulsive force, the first magnetic sheets are far away from the second magnetic sheets and abut against the non-contact areas of the hard gaskets and the clamping arms so as to coaxially and synchronously rotate with the paddles. According to the utility model, the failure time of the hard gasket can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of aircraft technology, and in particular to a folding propeller assembly and an aircraft. Background Technology

[0002] When an aircraft is not in operation for an extended period of time, the fixed, extended propeller blades result in a large overall size, making them inconvenient to store or transport. Therefore, the propeller blades are usually designed with a foldable structure.

[0003] In existing drones and other aircraft, the blades in the folding propeller structure are usually designed to rotate with the propeller clamp. To avoid wear when the blades rotate relative to the propeller clamp and to provide some resistance to the rotation of the blades, a hard shim that can increase friction is usually placed between the blades and the propeller clamp. By adjusting the gap between the blades and the propeller clamp, the blades are not easy to rotate, and the blades and the hard shim are kept relatively stationary when the blades rotate relative to the propeller clamp.

[0004] However, during the folding and unfolding of the propeller blades, friction and wear occur because the surfaces of both the upper and lower hard pads are in complete contact with the propeller clamp. This shortens the failure time of the hard pads, requiring frequent replacement of the hard pads, reducing the service life of the folding propeller assembly and increasing the cost of use. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a folding propeller assembly and aircraft that can extend the failure time of rigid gaskets.

[0006] On one hand, this utility model provides a folding propeller assembly, including a propeller clamp, a propeller blade, two rigid pads, a first magnetic plate, and a second magnetic plate. The propeller clamp has a clamping part, which includes clamping arms arranged opposite each other. The propeller blade is rotatably clamped between the two clamping arms. The two rigid pads are respectively rotatably clamped between the propeller blade and the two clamping arms. Both rigid pads rotate synchronously with the propeller blade on the same axis. The central region of one of the rigid pads remains in a non-contact state with the adjacent clamping arm. The first magnetic plate is disposed between the corresponding rigid pad and the corresponding clamping arm, and the radial cross-section of the first magnetic plate is smaller than the non-contact area between the corresponding rigid pad and the corresponding clamping arm. The second magnetic plate is disposed between the first magnetic plate and the corresponding clamping arm. The second magnetic plate is used to generate a magnetic repulsive force on the first magnetic plate. Under the action of the magnetic repulsive force, the first magnetic plate moves away from the second magnetic plate and presses against the area where the corresponding rigid pad and the clamping arm remain in non-contact, so as to rotate synchronously with the propeller blade on the same axis.

[0007] In addition, the folding paddle assembly described above according to this utility model may also have the following additional technical features:

[0008] Furthermore, the folding propeller assembly also includes a bolt bushing and a bolt. The bolt bushing passes through the clamping part. Both sets of clamping arms are provided with mounting holes. The bolt bushing passes through two of the mounting holes. The bolt is located in one of the mounting holes and is threadedly connected to the bolt bushing. The propeller blade, the rigid washer, the first magnetic plate, and the second magnetic plate are all sleeved on the bolt bushing.

[0009] Furthermore, the corresponding clamping arm is provided with a stepped groove, the corresponding mounting hole is connected to the bottom wall of the stepped groove, the large diameter end of the stepped groove faces the blade, the corresponding rigid pad is disposed in the large diameter end of the stepped groove, and the first magnetic sheet and the second magnetic sheet are both disposed in the small diameter end of the stepped groove.

[0010] Furthermore, the thickness of the corresponding rigid pad is greater than the groove depth at the large diameter end of the stepped groove.

[0011] Furthermore, the corresponding clamping arm is provided with a mounting groove, the corresponding mounting hole communicates with the bottom wall of the mounting groove, and the corresponding rigid pad is disposed in the mounting groove.

[0012] Furthermore, the thickness of the corresponding rigid gasket is greater than the depth of the mounting groove.

[0013] Furthermore, the paddle clamp includes a first clamping plate and a second clamping plate connected by a column, the first clamping plate and the second clamping plate being disposed opposite to each other to form the clamping portion at the end.

[0014] Furthermore, the columns are respectively located on both sides of the blade rotation path.

[0015] Furthermore, the rigid gasket is made of PE material.

[0016] On the other hand, based on the same inventive concept, this utility model also provides an aircraft that uses the aforementioned folding propeller assembly.

[0017] This invention has the following advantages: By setting a hard pad between the blade and the clamping arm, it can prevent the blade from directly contacting the clamping arm and causing wear, and also provide a certain resistance to the rotation of the blade. By setting a set of hard pads that do not fully contact the clamping arm between the blade and one of the clamping arms, and setting a first magnetic sheet and a second magnetic sheet in the area corresponding to the incomplete contact between the clamping arm and the hard pads, the second magnetic sheet can generate a magnetic repulsive force on the first magnetic sheet. The first magnetic sheet and the second magnetic sheet do not directly contact each other, and thus the part of the hard pad that contacts the first magnetic sheet does not directly contact the clamping arm, reducing the wear of the hard pad due to direct contact friction and extending the service life of the hard pad. At the same time, the magnetic repulsive force generated by the second magnetic sheet acts on the hard pad, making the hard pad contact the clamping arm more tightly, and generating greater resistance to prevent the blade from rotating, which can prevent the blade from loosening during use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a first-view exploded view of an embodiment of the present utility model;

[0020] Figure 3 This is a second-view exploded photograph of an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of an embodiment of the present utility model;

[0022] Figure 5 for Figure 4 Enlarged view of Example A in the text;

[0023] Figure 6 This is a first-view structural schematic diagram of the propeller clip according to an embodiment of the present invention;

[0024] Figure 7 This is a second-view structural schematic diagram of the propeller clip according to an embodiment of the present invention;

[0025] Paddle clamp 100, first clamping plate 110, first mounting hole 111, mounting groove 112, second clamping plate 120, second mounting hole 121, stepped groove 122, bolt bushing 130, column 140, blade 200, hard gasket 300, clamping arm 400, first magnetic plate 510, second magnetic plate 520;

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] like Figures 1 to 7 As shown, a folding paddle assembly provided by this utility model includes a paddle clip 100, a paddle blade 200, two rigid pads 300 (300a, 300b), a first magnetic sheet 510, and a second magnetic sheet 520.

[0031] Specifically, the propeller clamp 100 includes a clamping part, which includes clamping arms 400 (400a, 400b) arranged vertically opposite each other. The root of the propeller blade 200 is clamped between the clamping arms 400a and 400b, and the propeller blade 200 can rotate relative to the propeller clamp 100 to realize the functions of rotating and folding the propeller blade 200 and rotating and extending the propeller blade 200.

[0032] A rigid pad 300a is sandwiched between the upper surface of the blade 200 and the clamping arm 400a. The friction between the lower surface of the rigid pad 300a and the upper surface of the root of the blade 200 is greater than the friction between the upper surface of the rigid pad 300a and the lower surface of the clamping arm 400a. Thus, when the blade 200 rotates relative to the blade clamp 100, the rigid pad 300a and the blade 200 can remain relatively stationary.

[0033] A rigid pad 300b is sandwiched between the lower surface of the blade root 200 and the upper surface of the clamping arm 400b, with the central region of the rigid pad 300b maintaining a non-contact state with the adjacent clamping arm 400b. Simultaneously, a first magnetic sheet 510 is disposed between the lower surface of the rigid pad 300b and the upper surface of the clamping arm 400b, and the radial cross-section of the first magnetic sheet 510 is smaller than the area of ​​the non-contact region between the rigid pad 300b and the clamping arm 400b. A second magnetic sheet 520 is disposed between the lower surface of the first magnetic sheet 510 and the upper surface of the clamping arm 400b.

[0034] After assembly, the second magnetic sheet 520 generates an upward magnetic repulsion force on the first magnetic sheet 510. Optionally, the first magnetic sheet 510 and the second magnetic sheet 520 are each made of two magnetic sheets with the same magnetic polarity. When the two magnetic sheets with the same magnetic polarity approach each other, they generate a magnetic repulsion force. Under the action of this magnetic repulsion force, the lower surface of the first magnetic sheet 510 moves away from the upper surface of the second magnetic sheet 520. At this time, the first magnetic sheet 510 and the second magnetic sheet 520 do not come into contact. Therefore, there is no direct contact friction between the first magnetic sheet 510 and the second magnetic sheet 520. At the same time, under the action of this magnetic repulsion force, the upper surface of the first magnetic sheet 510 will tightly abut against the area between the lower surface of the rigid pad 300b and the clamping arm 400b, which is kept in a non-contact state. In this way, the first magnetic sheet 510 will rotate synchronously with the rigid pad 300b due to friction. While maintaining a relatively stationary state with respect to the rigid pad 300b, and because the circumferential edge of the lower surface of the rigid pad 300b does not directly contact the first magnetic sheet 510, the circumferential edge of the lower surface of the rigid pad 300b directly contacts the upper surface of the clamping arm 400b. The frictional force between the upper surface of the rigid pad 300b and the lower surface of the root of the blade 200 is greater than the frictional force between the lower surface of the rigid pad 300b and the upper surface of the clamping arm 400b. Thus, when the blade 200 rotates relative to the blade clamp 100, the rigid pad 300b and the blade 200 can remain relatively stationary. At this time, the friction generated between the lower surface of the rigid pad 300b and the upper surface of the clamping arm 400b, as well as the friction generated between the upper surface of the rigid pad 300a and the lower surface of the clamping arm 400a, achieves the effect of preventing the blade 200 from being easily rotated.

[0035] In this embodiment, compared to the traditional method, the rigid pad 300b only contacts the clamping arm 400b at its circumferential edge. This reduces the contact area, preventing the rigid pad 300b from experiencing significant friction and wear with the clamping arm 400b and thus avoiding rapid failure.

[0036] Preferably, both the first rigid gasket 300 and the second rigid gasket 400 are made of PE material.

[0037] It is understandable that the central region of the rigid pad 300a can be kept in a non-contact state with the adjacent clamping arm 400a, and the first magnetic sheet 510 can be disposed between the upper surface of the rigid pad 300a and the lower surface of the clamping arm 400a. The radial cross-section of the first magnetic sheet 510 can be set to be smaller than the area of ​​the non-contact region between the rigid pad 300a and the clamping arm 400a, and the second magnetic sheet 520 can be disposed between the upper surface of the first magnetic sheet 510 and the lower surface of the clamping arm 400a.

[0038] In order to assemble the propeller clip 100, propeller blade 200, two rigid gaskets 300 (300a, 300b), first magnetic plate 510, and second magnetic plate 520 together, in some alternative embodiments, such as Figures 1 to 7 As shown, the propeller clamp 100 also includes a bolt sleeve 130 passing through the clamping part and a bolt (not shown in the figure) threadedly connected to the bolt sleeve 130. A first mounting hole 111 is provided on the clamping arm 400a, and a second mounting hole 121 is provided on the clamping arm 400b. The central axes of the first mounting hole 111 and the second mounting hole 121 coincide. The propeller blade 200, two hard washers 300 (300a, 300b), the first magnetic plate 510, and the second magnetic plate 520 are all sleeved on the bolt sleeve 130. Exemplarily, during assembly, the bolt sleeve 130 is inserted from the second mounting hole 121 until it extends into the first mounting hole 111, and then the bolt is screwed from the first mounting hole 111 into the threaded hole inside the bolt sleeve 130.

[0039] In some alternative embodiments, such as Figure 1 , Figure 4 , Figure 6 As shown, the clamping arm 400b has a stepped groove 122 on the side facing the blade 200, with the larger diameter end of the stepped groove 122 at the top and the smaller diameter end at the bottom. A rigid pad 300b is placed inside the larger diameter end of the stepped groove 122, and the first magnetic piece 510 and the second magnetic piece 520 are placed sequentially from top to bottom inside the smaller diameter end of the stepped groove 122. Meanwhile, to facilitate the fitting of the first magnetic piece 510 and the second magnetic piece 520 onto the bolt sleeve 130, the second mounting hole 121 communicates with the bottom wall of the smaller diameter end of the stepped groove 122, allowing the bolt sleeve 130 to pass through. It is understood that when the first magnetic piece 510 rotates with the blade 200, to prevent the edge of the first magnetic piece 510 from rubbing against the groove wall of the stepped groove 122, the size of the first magnetic piece 510 needs to be designed to be smaller than the smaller diameter of the stepped groove 122.

[0040] In this embodiment, due to the presence of the stepped groove 122, only the circumferential edge of the rigid pad 300b comes into frictional contact with the large-diameter end of the stepped groove 122. Compared to the conventional method, the contact area between the rigid pad 300b and the clamping arm 400b is reduced, preventing the rigid pad 300b from experiencing significant frictional wear and rapid failure. Simultaneously, because the circumferential edge of the rigid pad 300b is in frictional contact with the large-diameter end of the stepped groove 122, compared to setting the large-diameter and small-diameter ends of the stepped groove 122 to be the same diameter, it avoids the rigid pad 300b and the clamping arm 400b being in a completely non-contact state, thus providing a certain degree of resistance to prevent the blade 200 from rotating. Furthermore, it is understood that the stepped groove 122 can also be provided on the clamping arm 400b.

[0041] In order to prevent contact and friction between the blade 200 and parts of the clamping arm 400b when the blade 200 rotates, in some optional embodiments, such as Figure 4 , Figure 6 As shown, the thickness of the rigid gasket 300b is greater than the groove depth at the large diameter end of the stepped groove 122.

[0042] To ensure good contact between the rigid pad 300a and the clamping arm 400a, and to prevent the blade 200 from easily rotating relative to the blade clamp 100, in some optional embodiments, such as Figure 4 , Figure 5 , Figure 7 As shown, the clamping arm 400a has a mounting groove 112 on the side facing the blade 200, and a rigid pad 300a is placed in the mounting groove 112. Optionally, the edge of the rigid pad 300a can be designed to contact the side wall of the mounting groove 112, thereby increasing the resistance to rotating the blade 200 and preventing the blade 200 from being easily rotated. At the same time, in order to facilitate the fitting of the rigid pad 300a onto the bolt bushing 130, the first mounting hole 111 communicates with the bottom wall of the mounting groove 112 to facilitate the movement of the bolt bushing 130.

[0043] In order to prevent contact and friction between the blade 200 and parts of the clamping arm 400a when the blade 200 rotates, in some optional embodiments, such as Figure 7 As shown, the thickness of the rigid gasket 300a is greater than the depth of the mounting groove 112.

[0044] In some alternative embodiments, such as Figure 3 , Figure 5 , Figure 6 , Figure 7As shown, the paddle clamp 100 includes a first clamping plate 110 and a second clamping plate 120 connected by a column 140. The first clamping plate 110 and the second clamping plate 120 are arranged opposite to each other to form a clamping portion at the end with clamping arms 400 (400a, 400b) arranged vertically opposite to each other. It can be understood that the first clamping plate 110, the second clamping plate 120 and the column 140 can be manufactured by an integral molding process, or the two ends of the column 140 can be fixed to the first clamping plate 110 and the second clamping plate 120 respectively by fasteners. Similarly, the first clamping plate 110 and the column 140 can be manufactured by an integral molding process, and then the second clamping plate 120 can be fixed to the column 140 by fasteners, or the second clamping plate 120 and the column 140 can be manufactured by an integral molding process, and then the first clamping plate 110 can be fixed to the column 140 by fasteners.

[0045] In some alternative embodiments, such as Figure 2 , Figure 6 , Figure 7 As shown, four columns 140 are provided, distributed in pairs at the left and right ends of the second clamping plate 120, and set at a preset angle. In this embodiment, by distributing the columns 140 on both sides of the rotation path of the blade 200, the blade 200 can abut against the columns 140 when folded, thereby limiting the rotation range of the blade 200. This helps to avoid excessive rotation of the blade 200 and mutual interference and collision, thus improving the reliability of use.

[0046] In addition, this utility model also provides an aircraft that uses the aforementioned folding propeller assembly.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A folding propeller assembly, characterized in that, The folding propeller assembly includes: A propeller clamp, wherein the propeller clamp is provided with a clamping part, the clamping part including clamping arms disposed opposite each other; The blade is rotated and clamped between the two clamping arms; Two rigid pads are respectively rotatably clamped between the blade and the two clamping arms, and both rotate synchronously with the blade on the same axis. The middle area of ​​one of the rigid pads remains in a non-contact state with the adjacent clamping arm. A first magnetic sheet is disposed between the corresponding rigid pad and the corresponding clamping arm, and the radial cross-section of the first magnetic sheet is smaller than the area of ​​the non-contact region between the corresponding rigid pad and the corresponding clamping arm. A second magnetic sheet is disposed between the first magnetic sheet and the corresponding clamping arm, and the second magnetic sheet is used to generate a magnetic repulsive force on the first magnetic sheet. Under the action of the magnetic repulsion force, the first magnetic sheet moves away from the second magnetic sheet and presses against the corresponding area where the hard pad and the clamping arm are not in contact, so as to rotate synchronously with the blade.

2. The folding propeller assembly according to claim 1, characterized in that, The folding propeller assembly also includes a bolt bushing and a bolt. The bolt bushing passes through the clamping part. Both sets of clamping arms are provided with mounting holes. The bolt bushing passes through two of the mounting holes. The bolt is located in one of the mounting holes and is threadedly connected to the bolt bushing. The propeller blade, the rigid washer, the first magnetic plate, and the second magnetic plate are all sleeved on the bolt bushing.

3. The folding propeller assembly according to claim 2, characterized in that, The corresponding clamping arm is provided with a stepped groove, the corresponding mounting hole is connected to the bottom wall of the stepped groove, the large diameter end of the stepped groove faces the blade, the corresponding rigid pad is provided in the large diameter end of the stepped groove, and the first magnetic sheet and the second magnetic sheet are both provided in the small diameter end of the stepped groove.

4. The folding propeller assembly according to claim 3, characterized in that, The thickness of the corresponding rigid pad is greater than the groove depth at the large diameter end of the stepped groove.

5. The folding propeller assembly according to claim 2, characterized in that, The corresponding clamping arm is provided with a mounting groove, the corresponding mounting hole is connected to the bottom wall of the mounting groove, and the corresponding rigid pad is provided in the mounting groove.

6. The folding propeller assembly according to claim 5, characterized in that, The thickness of the corresponding rigid gasket is greater than the depth of the mounting groove.

7. The folding propeller assembly according to any one of claims 1 to 6, characterized in that, The paddle clamp includes a first clamping plate and a second clamping plate connected by a column. The first clamping plate and the second clamping plate are arranged opposite to each other to form the clamping portion at the end.

8. The folding propeller assembly according to claim 7, characterized in that, The columns are located on both sides of the blade rotation path.

9. The folding propeller assembly according to any one of claims 1 to 6, characterized in that, The rigid gasket is made of PE material.

10. An aircraft, characterized in that, The folding paddle assembly as described in any one of claims 1 to 9 is applied.

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