propeller components and aircraft

Abstract

This utility model relates to aircraft, specifically providing a propeller assembly and an aircraft, aiming to solve the problem of effectively reducing the risk of damage to the propeller and related components when subjected to external impacts during operation. To this end, a propeller assembly of this utility model includes: a first connector for connecting the propeller body; a second connector for connecting the drive component, the first connector being detachably snapped into the second connector; an elastic member with one end connected to the first connector and the other end connected to the second connector, the elastic member being in a compressed state; when the operating propeller body is subjected to external force, it can drive the first connector into a separable state, and the elastic member can drive the first connector to separate from the second connector. This utility model can prevent the transmission of external impacts to the drive component, preventing deformation, breakage, or damage, thus protecting the propeller assembly and significantly improving the safety, reliability, and service life of the propeller assembly under abnormal operating conditions.

Description

Technical Field

[0001] This utility model relates to aircraft, specifically providing a propeller assembly and an aircraft. Background Technology

[0002] Propellers are widely used in drones, model airplanes, toy airplanes, and other aircraft to generate lift or thrust for flight. In these aircraft, propellers are typically fixed to the motor output shaft or transmission mechanism via a connecting structure to achieve rotational drive. However, during flight, propellers are highly susceptible to impact from external forces (such as collisions with obstacles, the ground, or other aircraft). Because traditional propellers are mostly rigidly connected structures, they often cannot detach from the connecting parts in time when subjected to external impacts, leading to damage such as bending or breakage of propeller blades, connecting parts, or motor shafts, and potentially even causing damage to external objects.

[0003] To mitigate the risk of such damage, existing technologies have attempted to improve propeller impact resistance by employing flexible materials, adding protective shields, or incorporating break pins. However, these methods often suffer from structural complexity, high manufacturing costs, or adverse effects on flight performance. For example, while flexible materials can absorb impact forces to some extent, they can lead to insufficient thrust or reduced efficiency; and although protective shield structures can prevent direct contact with foreign objects, they increase overall weight and affect airflow.

[0004] Therefore, there is an urgent need in the field for a propeller assembly and aircraft to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problem, namely, how to effectively reduce the risk of damage to the propeller and related components when the existing propeller is subjected to external impact during operation.

[0006] In a first aspect, the present invention provides a propeller assembly comprising:

[0007] The first connector is used to connect the propeller body;

[0008] The second connector is used to connect the drive component, and the first connector is detachably snapped into the second connector;

[0009] An elastic element, one end of which is connected to the first connecting element and the other end of which is connected to the second connecting element, is in a compressed state;

[0010] When the propeller body in operation is subjected to external force, it can drive the first connecting member into a separable state. In the compressed state, the elastic member can drive the first connecting member in the separable state to separate from the second connecting member, so that the propeller body is separated from the driving member.

[0011] In a specific embodiment of the above propeller assembly, the first connector includes at least two claws, and the second connector is provided with a slot, the slot and the claw being provided in a one-to-one correspondence, the claw being detachably engaged with the slot, so that the first connector can be detachably engaged with the second connector.

[0012] In a specific embodiment of the above propeller assembly, the slot extends along an arc direction, the center of the arc is located on the axis of the propeller body, and the claw can move along the arc direction in the slot to make the first connector engage with the second connector, or to make the first connector enter a separable state.

[0013] In a specific embodiment of the above propeller assembly, the claw includes a connecting piece and a locking block. One end of the connecting piece is connected to the first connector, and the other end is connected to the locking block. The width of the locking block is greater than the thickness of the connecting piece.

[0014] The slot includes an insertion part and a limiting part. The claw can extend into the insertion part. The limiting part is connected to the insertion part. The width of the limiting part is smaller than the width of the card block and larger than the thickness of the connecting piece, so that the connecting piece can extend into the limiting part.

[0015] The thickness of the second connector is less than the distance between the locking block and the first connector. The connecting piece can pass through the limiting part, and the locking block is located outside the slot. The elastic member can drive the locking block to abut against the outer wall of the second connector so that the claw engages with the slot.

[0016] In a specific embodiment of the above-mentioned propeller assembly, the insertion part is located at the rear end of the arc where the slot is located relative to the rotation direction of the propeller assembly during operation, and the limiting part is located at the front end of the arc where the slot is located relative to the rotation direction of the propeller assembly during operation.

[0017] In a specific embodiment of the above propeller assembly, the elastic element is fixedly connected to one of the first connector and the second connector, and abuts against the other.

[0018] In a specific embodiment of the above propeller assembly, the first connector is provided with a first groove, the second connector is provided with a second groove, and a portion of the elastic member is disposed in the first groove and the other portion is disposed in the second groove.

[0019] In a second aspect, the present invention provides an aircraft comprising the aforementioned propeller assembly.

[0020] In a specific embodiment of the above-described aircraft, the aircraft includes an aircraft body, and the connector is connected to the aircraft body.

[0021] By adopting the above technical solution, this utility model detachably engages the second connector for connecting the drive component and the first connector for connecting the propeller body, allowing the drive component to drive the propeller body to rotate via the second and first connectors. During operation, if the propeller body is subjected to external force, the force can cause the first connector to enter a separable state, releasing energy from the compressed elastic element and driving the first connector, which has entered the separable state, to separate from the second connector, thereby detaching the propeller body from the drive component. This separation structure effectively prevents the direct transmission of external impact to the drive component and ensures timely separation of the first and second connectors under external force, preventing deformation, breakage, or damage. This protects the overall structure of the propeller assembly and significantly improves the safety, reliability, and service life of the propeller assembly under abnormal operating conditions.

[0022] Furthermore, the first connector includes at least two claws, and the slots on the second connector correspond one-to-one with the claws. The multiple claws provide multi-point engagement support when the propeller body is connected to the drive component, making the connection more stable and reliable. This avoids loosening or detachment caused by single-point connections, improves the uniformity of stress and overall stability of the connection structure, thereby ensuring the balance and safety of the propeller during operation, and further enhancing the reliability and service life of the propeller assembly.

[0023] Furthermore, the slot extends along an arc direction, with its center located on the axis of the propeller body, allowing the claws to move along the arc direction within the slot. When the propeller body is subjected to an external force, the force can drive the claws to move within the slot along the arc direction, thereby transitioning the claws from a snap-fit ​​state to a separable state, providing conditions for the separation of the propeller body from the drive component.

[0024] Furthermore, the claw includes a connecting piece and a locking block, and the slot includes an insertion part and a limiting part. The claw can extend into the slot through the insertion part and can also disengage from the slot through the insertion part. Since the thickness of the second connecting member is less than the distance between the locking block and the first connecting member, the locking block can move to the outside of the slot. Simultaneously, the width of the limiting part is greater than the thickness of the connecting piece, allowing the connecting piece to extend into the limiting part. However, the width of the limiting part is less than the width of the locking block, preventing the locking block from disengaging from the slot. The elastic element abuts the locking block against the outer wall of the second connecting member, thus achieving a secure engagement between the first and second connecting members. When the propeller body is subjected to external force, the force can cause the claw to move along the slot to the insertion part, allowing the first connecting member to enter a separable state, thus protecting the propeller body and the drive component.

[0025] Furthermore, when the claw is in the limiting position, the elastic element can drive the second abutment surface on the locking block to abut the first abutment surface on the second connector, achieving a secure locking between the claw and the slot. This design not only enhances the bonding force and vibration resistance of the first and second connectors, ensuring the stability of the propeller during operation, but also effectively prevents loosening or separation of the connection caused by external forces or inertia, thereby improving the safety and reliability of the propeller assembly.

[0026] Furthermore, the limiting block on the second connector protrudes from the end of the first abutment surface near the insertion part. When the second abutment surface of the locking block abuts against the first abutment surface, the limiting block can effectively block the locking block and prevent it from accidentally disengaging during normal operation, thereby ensuring a stable connection between the first connector and the second connector. At the same time, the limiting block is provided with an arc surface. When the propeller body is subjected to an external force exceeding a preset value, the locking block can move along the arc surface to the insertion part, realizing the automatic separation of the first connector and the second connector, avoiding excessive impact on the propeller body and drive components, thereby significantly improving the safety and reliability of the propeller assembly.

[0027] Furthermore, the insertion part is located at the rear end of the arc of the slot, and the limiting part is located at the front end of the arc. This allows the first claw to shift towards the limiting part due to rotational inertia during normal propeller operation, thus maintaining a secure connection between the first and second connecting parts and preventing accidental separation during propeller operation. When the propeller body is obstructed by external force and cannot rotate normally, the first connecting part rotates in the opposite direction relative to the second connecting part, causing the first claw to move along the arc to the insertion part. Combined with the thrust of the elastic element, this achieves automatic separation between the first and second connecting parts, effectively protecting the propeller body and drive components from external damage, thus ensuring both operational stability and safety.

[0028] Furthermore, one end of the elastic element is fixedly connected to the first or second connector, while the other end abuts against another connector, ensuring that it remains connected to at least one end even when the first and second connectors are separated, thus preventing the elastic element from falling off or being lost. This structure not only guarantees the reliability of the elastic element in the separated state but also facilitates repeated assembly and maintenance of the assembly, improving the ease of use and overall reliability of the propeller assembly. Attached Figure Description

[0029] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0030] Figure 1 This is a structural schematic diagram of the first connector provided by this utility model;

[0031] Figure 2 This is a first-view structural schematic diagram of the second connector provided by this utility model;

[0032] Figure 3 This is a schematic diagram of the second connecting member provided by this utility model from a second perspective.

[0033] Figure 4 This is a third-view structural schematic diagram of the second connector provided by this utility model. The dotted and dashed lines in the figure show the circumference with the center of the second disk as the center.

[0034] Figure 5 This is a structural schematic diagram of the first contact surface and the limiting block provided by this utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the second contact surface provided by this utility model;

[0036] Figure 7 This is a schematic diagram of the internal structure of the propeller assembly provided by this utility model;

[0037] Figure 8 This is a first-view structural schematic diagram of the first combination state of the first connector and the second connector provided by this utility model;

[0038] Figure 9 This is a second-view structural schematic diagram of the first combination state of the first connector and the second connector provided by this utility model;

[0039] Figure 10 This is a first-view structural schematic diagram of the second combination state of the first connector and the second connector provided by this utility model;

[0040] Figure 11 This is a second-view structural schematic diagram of the second combination state of the first connector and the second connector provided by this utility model;

[0041] Figure 12 This is a schematic diagram of the internal structure of the propeller assembly in the second combined state provided by this utility model;

[0042] Figure 13 This is a first-view structural schematic diagram of the propeller assembly provided by this utility model;

[0043] Figure 14 This is a second-view structural schematic diagram of the propeller assembly provided by this utility model.

[0044] List of reference numerals in the attached diagram:

[0045] 1. First connector; 11. First disc; 111. First groove; 12. First claw; 121. Connecting piece; 122. Block; 1221. Second abutting surface; 13. Second claw; 2. Propeller body; 3. Second connector; 31. Drive component connecting part; 311. Connecting hole; 32. Second disc; 321. First slot; 3211. Insertion part; 3212. Limiting part; 322. Second slot; 323. First abutting surface; 324. Limiting block; 3241. Arc surface; 325. Second groove; 4. Elastic element. Detailed Implementation

[0046] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0047] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] To address the problem of effectively reducing the risk of damage to propellers and related components when subjected to external impacts during operation, this embodiment discloses an aircraft. In this embodiment, the aircraft is a toy airplane; in other embodiments, the aircraft may also be a drone, etc.

[0050] The aircraft includes a propeller assembly. The propeller assembly includes a propeller body, a first connector, a second connector, and a flexible element.

[0051] The structure of the propeller body is the same as that of propellers in the prior art, and its specific structure will not be described in detail here.

[0052] Reference Figure 1The first connecting member 1 includes a first disc 11, a first claw 12, and a second claw 13. The propeller body 2 is connected to the first disc 11. Specifically, the propeller body 2 and the first disc 11 can be integrally formed and connected, or they can be connected by threaded fasteners. A first groove 111 is provided in the middle of the first disc 11, which is used to accommodate one end of the elastic member 4. The first claw 12 and the second claw 13 are distributed on the edge of the first disc 11, and the first claw 12 and the second claw 13 are symmetrically arranged on the first disc 11. The shape of the first claw 12 is the same as the shape of the second claw 13. The specific shape of the claw is described below using the first claw 12 as an example. The first claw 12 includes a connecting piece 121 and a locking block 122. The connecting piece 121 is an arc-shaped plate, with one end connected to the edge of the first disc 11 and the other end connected to the locking block 122. The width of the locking block 122 is greater than the width of the connecting piece 121. Furthermore, the outer wall of the card block 122 is provided with an inclined guide surface.

[0053] Reference Figure 2 The second connector 3 includes a drive component connecting portion 31 and a second disk 32. The drive component is specifically a motor (not shown in the figure). The drive component connecting portion 31 is cylindrical and has a connecting hole 311 for connecting the motor shaft. (See reference...) Figure 3 The second disc 32 is disposed at one end of the motor connection portion. A second groove 325 is provided in the center of the second disc 32, which accommodates the other end of the elastic element 4. The second disc 32 also has a first slot 321 and a second slot 322. The first slot 321 is used to connect the first claw 12, and the second slot 322 is used to connect the second claw 13. The first slot 321 and the second slot 322 are symmetrically arranged with the center of the second disc 32 as the center. The specific shape of the slot is described below using the first slot 321 as an example.

[0054] Reference Figure 4The first slot 321 extends along an arc, with the center of the second disk 32 as its center. The first slot 321 includes an insertion portion 3211 and a limiting portion 3212. The opening area of ​​the insertion portion 3211 is larger than the cross-sectional area of ​​the locking block 122 of the first claw 12, allowing the first claw 12 to extend into the insertion portion 3211 and into the first slot 321. The first claw 12 can also disengage from the insertion portion 3211 and the first slot 321. The thickness of the second disk 32 is less than the length of the connecting piece 121; in other words, the thickness of the second disk 32 is less than the distance between the locking block 122 and the first disk 11. When the locking block 122 extends into the insertion portion 3211, the first claw 12 can further extend into the insertion portion 3211, so that the connecting piece 121 passes through the insertion portion 3211 and the locking block 122 is located outside the second disk 32. The limiting portion 3212 of the first slot 321 is connected to the insertion portion 3211 and extends along the aforementioned arc direction. Further, the insertion portion 3211 is located at the rear end of the arc where the first slot 321 is located relative to the rotation direction of the propeller assembly during operation, and the limiting portion 3212 is located at the front end of the arc where the first slot 321 is located relative to the rotation direction of the propeller assembly during operation. In this embodiment, the propeller assembly rotates counterclockwise during operation. The insertion portion 3211 is located at the rear end of the arc in the counterclockwise direction, and the limiting portion 3212 is located at the front end of the arc in the counterclockwise direction. The width of the limiting portion 3212 is slightly larger than the thickness of the connecting piece 121, so that the connecting piece 121 can extend into the limiting portion 3212. Furthermore, the width of the limiting portion 3212 is smaller than the width of the locking block 122, so that the locking block 122 cannot disengage from the first slot 321 at the limiting portion 3212. Further, referring to… Figure 5 The second disc 32 has a first abutment surface 323 on its side away from the first connector 1, and the first abutment surface 323 is located near the limiting part 3212. (Refer to...) Figure 6 The locking block 122 is provided with a second abutment surface 1221. When the locking claw is located at the limiting portion 3212 of the first locking groove 321, the first abutment surface 323 and the second abutment surface 1221 are arranged opposite to each other. Further, referring to... Figure 5 The first contact surface 323 has a limiting block 324 protruding at one end near the insertion part 3211, and the limiting block 324 has an arc surface 3241.

[0055] Reference Figure 7 The elastic element 4 is specifically a cylindrical helical spring, with one end of the elastic element 4 disposed in the first groove 111 and the other end disposed in the second groove 325. The elastic element 4 is fixedly connected to one of the first connecting member 1 and the second connecting member 3, and abuts against the other.

[0056] The propeller assembly works as follows: the propeller body 2 is connected to the first connecting member 1, and the second connecting member 3 is connected to the drive member. The first connecting member 1 and the second connecting member 3 are detachably snap-fitted together. Specifically, refer to... Figure 8 and Figure 9 When the first connector 1 and the second connector 3 are engaged, the first claw 12 extends into the insertion portion 3211 of the first slot 321 until the connecting piece 121 of the first claw 12 passes through the first slot 321, and the locking block 122 is located outside the first slot 321. Then refer to... Figure 10 and Figure 11 The first connecting member 1 is rotated along the first slot 321 to move the connecting piece 121 of the first claw 12 into the limiting portion 3212 of the first slot 321. Simultaneously, one end of the elastic member 4 is disposed within the first groove 111 of the first connecting member 1, and the other end is disposed within the second groove 325 of the second connecting member 3. (Refer to...) Figure 12 After the first claw 12 connects with the first slot 321, the elastic element 4 is in a compressed state. In other words, the thrust of the elastic element 4 drives the first connecting element 1 and the second connecting element 3 away from each other, so that the second abutting surface 1221 of the locking block 122 abuts against the first abutting surface 323 of the second disk 32. Furthermore, the thrust of the elastic element 4 increases the friction between the locking block 122 and the second disk 32, making the connection between the first connecting element 1 and the second connecting element 3 more stable. In addition, the limiting block 324 can limit the circumferential position of the locking block 122 so that the first claw 12 engages with the first slot 321. The connection method of the second claw 13 and the second slot 322 is the same, and the connection is completed synchronously with the first claw 12 and the first slot 321, so it will not be described in detail.

[0057] Reference Figure 13 and Figure 14 After the first connector 1 and the second connector 3 complete the above connection, the motor shaft of the drive unit, the second disk 32 of the second connector 3, the first disk 11 of the first connector 1, and the propeller body 2 are all coaxially arranged. The drive unit can drive the second connector 3, the first connector 1, and the propeller body 2 to rotate synchronously. In this embodiment, the propeller body 2 rotates counterclockwise. The first pawl 12 is also rotated counterclockwise due to the inertia of rotation, causing the first pawl 12 to rotate away from the insertion part 3211 of the first slot 321 limiting part 3212, thereby preventing the first connector 1 from separating from the second connector 3 when the propeller body 2 rotates.

[0058] When the drive unit drives the propeller body 2 to rotate counterclockwise, the propeller body 2 is affected by external force and cannot rotate normally. At the same time, the drive unit continues to drive the second connecting member 3 to rotate counterclockwise. This causes the first connecting member 1 to be affected by external force. When the external force is greater than a preset value, the locking block 122 of the first claw 12 can move along the arc surface 3241 of the limiting block 324, causing the first connecting member 1 to rotate clockwise relative to the second connecting member 3, thereby causing the connecting piece 121 of the first claw 12 to move to the insertion part 3211. Since the locking block 122 of the first claw 12 can disengage from the first slot 321 at the insertion part 3211, the first connecting member 1 enters a separable state. At the same time, the compressed elastic member 4 drives the claw of the first claw 12 to disengage from the first slot 321 at the insertion part 3211, so that the first connecting member 1 is separated from the second connecting member 3, thereby separating the propeller body 2 from the drive unit. This configuration can protect the propeller body 2 and the drive components when the propeller body 2 is subjected to external forces during operation.

[0059] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A propeller assembly, characterized in that, include: The first connector (1) is used to connect the propeller body (2). The second connector (3) is used to connect the drive unit, and the first connector (1) is detachably snapped onto the second connector (3). An elastic element (4) has one end connected to the first connecting element (1) and the other end connected to the second connecting element (3), and the elastic element (4) is in a compressed state; When the propeller body (2) in operation is subjected to external force, it can drive the first connecting member (1) into a separable state. In the compressed state, the elastic member (4) can drive the first connecting member (1) in the separable state to separate from the second connecting member (3), so that the propeller body (2) is separated from the driving member.

2. The propeller assembly according to claim 1, characterized in that, The first connector (1) includes at least two claws, and the second connector (3) is provided with a slot. The slot and the claw are respectively provided. The claw can be detachably engaged in the slot so that the first connector (1) can be detachably engaged in the second connector (3).

3. The propeller assembly according to claim 2, characterized in that, The slot extends along the arc direction, and the center of the arc is located on the axis of the propeller body (2). The claw can move along the arc direction in the slot so that the first connector (1) is engaged with the second connector (3), or the first connector (1) enters a separable state.

4. The propeller assembly according to claim 3, characterized in that, The claw includes a connecting piece (121) and a locking block (122). One end of the connecting piece (121) is connected to the first connector (1), and the other end is connected to the locking block (122). The width of the locking block (122) is greater than the thickness of the connecting piece (121). The slot includes a plug-in portion (3211) and a limiting portion (3212). The claw can extend into the plug-in portion (3211). The limiting portion (3212) communicates with the plug-in portion (3211). The width of the limiting portion (3212) is smaller than the width of the card block (122) and larger than the thickness of the connecting piece (121), so that the connecting piece (121) can extend into the limiting portion (3212). The thickness of the second connector (3) is less than the distance between the locking block (122) and the first connector (1). The connecting piece (121) can pass through the limiting part (3212), and the locking block (122) is located outside the slot. The elastic member (4) can drive the locking block (122) to abut against the outer wall of the second connector (3) so that the claw can engage with the slot.

5. The propeller assembly according to claim 4, characterized in that, The second connector (3) includes a first abutting surface (323), which is disposed on a side of the second connector (3) away from the first connector (1) and is disposed near the limiting portion (3212); The locking block (122) includes a second abutting surface (1221). When the locking claw is located at the limiting part (3212), the elastic member (4) can drive the second abutting surface (1221) to abut against the first abutting surface (323).

6. The propeller assembly according to claim 5, characterized in that, The second connector includes a limiting block (324), which protrudes from the first abutting surface (323) at one end near the insertion part (3211). When the second abutting surface (1221) abuts against the first abutting surface (323), the limiting block (324) can block the locking block (122). The limiting block (324) includes an arc surface (3241). When the external force on the propeller body (2) is greater than a preset value, the locking block (122) can move along the arc surface (3241) so that the locking block (122) moves to the insertion part (3211).

7. The propeller assembly according to claim 4, characterized in that, The insertion part (3211) is located at the rear end of the arc where the slot is located relative to the rotation direction of the propeller assembly during operation, and the limiting part (3212) is located at the front end of the arc where the slot is located relative to the rotation direction of the propeller assembly during operation.

8. The propeller assembly according to claim 1, characterized in that, The elastic element (4) is fixedly connected to one of the first connector (1) and the second connector (3), and abuts against the other.

9. The propeller assembly according to claim 1, characterized in that, The first connector (1) is provided with a first groove (111), the second connector (3) is provided with a second groove (325), and a part of the elastic member (4) is provided in the first groove (111) and the other part is provided in the second groove (325).

10. An aircraft, characterized in that, Includes the propeller assembly as described in any one of claims 1-9.

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