Propeller mechanism against reverse insertion

Abstract

The utility model discloses a kind of anti-reverse insertion propeller mechanisms, including motor assembly and propeller assembly. The driving turntable of motor assembly is uniformly arranged with several first magnets in circumference, and polarity same third magnet is additionally arranged in at least one gap thereof;Second magnet corresponding with first magnet is equipped on the driven turntable of propeller assembly. Both are inserted and matched by rotating shaft and rotating hole, and realize non-contact transmission by the magnetic attraction between first magnet and second magnet;The utility model fundamentally prevents propeller misinstallation by physical magnetic pole, ensures the correctness of double propeller system outer rotation work, simultaneously reliable structure, it is convenient to maintain, effectively solve the problems, such as misinstallation risk, efficiency decline and inconvenient maintenance in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of propellers, and in particular relates to a propeller mechanism that prevents reverse insertion. Background Technology

[0002] In small aquatic devices such as pool cleaning robots, twin-propeller propulsion systems are widely used due to their compact structure and high propulsion efficiency. To ensure the stability and control precision of the equipment's straight-line travel, the twin propellers are usually required to operate in an outward-rotating manner, meaning the two propellers rotate in opposite directions. If the propellers are installed backwards during installation, the twin propellers will become inward-rotating, which will not only significantly reduce propulsion efficiency but may also cause overall machine vibration, deviation from the course, or control abnormalities, seriously affecting the performance and reliability of the equipment.

[0003] Currently, the common propeller installation and anti-misinstallation methods in the industry mainly include the following: First, using screws for fixing, with the propeller rotation direction predetermined at the factory. Although this method is simple in structure, it is difficult for users to disassemble and clean, easily leading to debris entanglement or dirt accumulation, resulting in poor maintainability. Second, using mechanical foolproof structures, such as limit grooves and asymmetrical shaft holes, to prevent reverse installation. This method requires additional parts or special designs, increasing material and manufacturing costs, and may also reduce reliability due to structural complexity.

[0004] Therefore, existing twin propeller anti-misinstallation technologies still have problems such as inconvenient maintenance, high cost, or low efficiency. Utility Model Content

[0005] This invention addresses the problems of reverse or incorrect installation risks and maintenance inconvenience caused by existing dual propellers by providing a simple, reliable, and easy-to-maintain anti-reverse-installation propeller mechanism.

[0006] This utility model provides a propeller mechanism for preventing reverse insertion, including a motor assembly and a propeller assembly, wherein the motor assembly is used to drive the propeller assembly to rotate;

[0007] The motor assembly includes a drive motor, a drive turntable, and a sealed housing; the drive motor is fixed inside the sealed housing, and its output shaft is connected to the drive turntable to drive the drive turntable to rotate; the drive turntable has a plurality of first magnets evenly distributed around its circumference, and the first magnets are arranged with their N poles or S poles facing the propeller assembly; the sealed housing extends toward the propeller assembly at the position of the drive turntable axis to form a rotating shaft.

[0008] The propeller assembly includes a driven turntable and a propeller; the driven turntable is connected to the propeller to form a synchronously rotating main body; the driven turntable has second magnets corresponding to the first magnet evenly distributed circumferentially, and the second magnets are arranged with their N pole or S pole facing the motor assembly; the driven turntable is annular, and the propeller has an insertion hole; the hollow hole of the driven turntable and the insertion hole of the propeller form a rotating hole;

[0009] After the motor assembly and propeller assembly are assembled, the rotating hole is inserted into the rotating shaft and connected by magnetic attraction through the first magnet and the second magnet.

[0010] A third magnet is disposed on the drive turntable in the gap between at least one of the first magnets.

[0011] Preferably, the propeller includes blades, a connecting disc, and a connecting column; the blades are located on one side of the connecting column and are used to generate thrust in the water; the connecting disc is located on the other side of the connecting column, and the connecting disc is detachably and fixedly connected to the driven turntable.

[0012] Preferably, the propeller assembly includes a first bearing and a second bearing. The first bearing is disposed at the position of the hollow hole of the driven turntable, the outer ring of the first bearing is engaged with the inner wall of the hollow hole, and the inner ring of the first bearing is engaged with the shaft. The second bearing is disposed inside the insertion hole of the propeller, the outer ring of the second bearing is engaged with the inner wall of the insertion hole, and the inner ring of the second bearing is engaged with the shaft.

[0013] Preferably, the propeller assembly further includes a fixing sleeve, which is sleeved on the rotating shaft and located between the first bearing and the second bearing; to prevent axial displacement of the first bearing and the second bearing when the propeller assembly rotates.

[0014] Preferably, the connecting plate is provided with a bayonet, and the driven turntable is provided with a corresponding retaining ring. The bayonet and the retaining ring cooperate to achieve a detachable and fixed connection between the propeller and the driven component.

[0015] Preferably, the connecting plate is provided with a positioning post, and the driven turntable is provided with a corresponding positioning hole, and the positioning post and the positioning hole are engaged.

[0016] Preferably, the drive turntable is provided with a plurality of first receiving cavities, the first magnet is located in the first receiving cavity, a third receiving cavity is provided in the gap between at least one of the first receiving cavities, the third magnet is located in the third receiving cavity, and the driven turntable is provided with a second receiving cavity corresponding to the first receiving cavity, the second magnet is located in the second receiving cavity.

[0017] Preferably, the motor assembly further includes a fixing disk, and the fixing disk has a fixing protrusion on the side facing the drive turntable that corresponds to the positions of the first receiving cavity and the third receiving cavity. The fixing disk is fixedly connected to the drive turntable, and the fixing protrusion extends into the first receiving cavity and the third receiving cavity to press and fix the first magnet and the third magnet.

[0018] The beneficial effects of this utility model are as follows: Through the directional matching design of the magnetic poles, the physical anti-reverse insertion of the propeller assembly is achieved, fundamentally eliminating the possibility of misinstallation and ensuring the operating efficiency and reliability of the equipment; the motor assembly and the propeller assembly adopt magnetic coupling transmission, realizing contactless and leak-free power transmission, which is suitable for underwater confined environments; the propeller assembly adopts the combination of shaft limiting and magnetic attraction, realizing quick disassembly and reliable connection, greatly facilitating the user's daily cleaning and maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the anti-reverse insertion propeller mechanism provided by this utility model;

[0020] Figure 2 This is an exploded view of the anti-reverse insertion propeller mechanism motor assembly provided by this utility model;

[0021] Figure 3 This is an exploded view of the propeller assembly of the anti-reverse insertion propeller mechanism provided by this utility model;

[0022] Figure 4 This is a diagram showing the positional relationship between the first and third magnets of the anti-reverse insertion propeller mechanism provided by this utility model;

[0023] Figure 5 This is a structural diagram of the anti-reverse insertion propeller mechanism provided by this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Furthermore, it should be understood that the specific embodiments described herein are merely used to explain this utility model and are not intended to limit this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral molding; they can refer to mechanical connections or indirect connections through an intermediate medium; they can refer to direct connections between two components or indirect transmission or cooperation achieved through other structures. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0028] This utility model provides a propeller mechanism to prevent reverse insertion, such as Figures 1 to 3 As shown, there is a motor assembly 1 and a propeller assembly 2, wherein the motor assembly 1 is used to drive the propeller assembly 2 to rotate;

[0029] The motor assembly includes a drive motor 11, a drive turntable 12, and a sealed housing 13. The drive motor 11 is fixed inside the sealed housing 13, and its output shaft is connected to the drive turntable 12 to drive the drive turntable 12 to rotate. The drive turntable 12 has a plurality of first magnets 121 evenly distributed around its circumference. The first magnets 121 are arranged with their N poles or S poles facing the propeller assembly 2. The sealed housing 13 extends toward the propeller assembly 2 at the position of the axis of the drive turntable 12 to form a rotating shaft 131.

[0030] The propeller assembly 2 includes a driven turntable 21 and a propeller 22; the driven turntable 21 is connected to the propeller 22 to form a synchronously rotating main body; the driven turntable 21 has second magnets 211 corresponding to the first magnet 121 evenly distributed around its circumference; the second magnets 211 are arranged with their N pole or S pole facing the motor assembly 1; the driven turntable 21 is annular; the propeller 22 has an insertion hole 221; the hollow hole of the driven turntable 21 and the insertion hole 221 of the propeller 22 form a rotating hole.

[0031] After the motor assembly 1 and the propeller assembly 2 are assembled, the rotating hole is inserted into the rotating shaft 131 and is magnetically connected by the first magnet 121 and the second magnet 211.

[0032] A third magnet 122 is disposed on the drive turntable 12 in the gap between at least one of the first magnets 121.

[0033] The anti-reverse insertion propeller mechanism of this utility model is based on the error-proof principle of magnetic pole directional matching design, and the specific implementation is as follows:

[0034] For example, such as Figure 4 As shown, taking three first magnets as an example, the first magnets 121 are arranged at 120° intervals on the circumference of the drive turntable 12, and the third magnet 122 is arranged in the gaps between the first magnets 121. It is understood that the above description using three first magnets 121 as an example is only a preferred embodiment, which can well balance the stability of the structural function. However, the scope of protection of this utility model is not limited to this. The number of first magnets 121 can be four, six, or more, as long as they are uniformly distributed circumferentially (e.g., 90-degree intervals for four first magnets, and 60-degree intervals for six first magnets 121), all of which can achieve the purpose of this utility model. Based on the same inventive concept, these modified embodiments will not be described in detail, but should all be covered within the scope of protection.

[0035] For any single propeller mechanism in the entire twin-propeller system:

[0036] When correctly installed, the propeller assembly 2 is inserted at any angle through the engagement of the rotating hole and the rotating shaft 131. The adaptive engagement of the first magnet 121 and the second magnet 211 aligns the first magnet 121 on the drive turntable 12 with the second magnet 211 on the driven turntable 21. Since the magnetic poles of the first and second magnets are configured to attract each other (e.g., when the first magnet is the N pole, the corresponding second magnet is the S pole; when the first magnet is the S pole, the corresponding second magnet is the N pole), a magnetic attraction is generated, coupling the driven turntable 21 with the drive turntable 12. When the drive motor 11 rotates, the drive turntable 12 drives the driven turntable 21 and the propeller 22 to rotate synchronously through the magnetic attraction, thus achieving power transmission.

[0037] Anti-reverse insertion principle: It is understandable that if the drive turntable 12 only has uniformly distributed first magnets 121, and the user mistakenly installs the propeller assembly 2 in the dual-propeller device backwards, a specific misalignment occurs: the second magnet 211 on the driven turntable 21 is precisely aligned with the gap between the two first magnets 121 on the drive turntable 12. In this case, since there is no magnet at the gap, the second magnet 211 will not experience a strong magnetic force (neither significant attraction nor repulsion). The user can still smoothly insert the propeller assembly 2 into the shaft 131, leading to the mistaken belief that it is correctly installed. However, at this time, the first magnets 121 and the second magnet 211 are not properly coupled, but completely misaligned. After starting the drive motor 11, due to the chaotic magnetic circuit, torque cannot be effectively transmitted, causing the propeller assembly 2 to not rotate or rotate weakly. It may even cause severe system vibration due to the incorrect sequence of attraction and repulsion between the magnets, resulting in component damage.

[0038] In this embodiment, the third magnet 122 is located in the gap between the first magnets 121, and its polarity is the same as that of the first magnets 121. When the propeller assembly 2 is incorrectly installed, a repulsive force will always be generated after insertion at any angle, preventing the propeller assembly 2 from being inserted further, thereby preventing reverse connection.

[0039] For example, to adapt to a dual-propeller system, it is necessary to ensure that both propellers operate in an external rotation configuration. Therefore, the propeller mechanisms on the left and right sides adopt a symmetrical magnetic pole configuration.

[0040] For the left propeller mechanism: the first magnet 121 and the third magnet 122 on its motor assembly 1 are set as N poles, and the second magnet 211 on the propeller assembly 2 is set as S poles.

[0041] For the right propeller mechanism: the first magnet 121 and the third magnet 122 on its motor assembly 1 are set as S poles, and the second magnet 211 on the propeller assembly 2 is set as N poles.

[0042] This symmetrical design ensures that the left and right propeller assemblies 2 cannot be interchanged due to their magnetic pole configuration, eliminating the possibility of incorrectly swapping the left and right propeller assemblies and fundamentally guaranteeing the correctness of the external rotation operation of the dual propeller system.

[0043] Specifically, such as Figure 5 As shown, the propeller 22 includes blades 222, a connecting disk 223, and a connecting column 224. The blades 222 are located on one side of the connecting column 224 and are used to generate thrust in the water; the connecting disk 223 is located on the other side of the connecting column 224, and the connecting disk 223 is detachably and fixedly connected to the driven turntable 21.

[0044] Specifically, such as Figure 3 As shown, the propeller assembly 2 includes a first bearing 23 and a second bearing 24. The first bearing 23 is disposed at the position of the hollow hole of the driven turntable 21. The outer ring of the first bearing 23 is engaged with the inner wall of the hollow hole, and the inner ring of the first bearing 23 is engaged with the rotating shaft 131. The second bearing 24 is disposed inside the insertion hole 221 of the propeller 22. The outer ring of the second bearing 24 is engaged with the inner wall of the insertion hole 221, and the inner ring of the second bearing 24 is engaged with the rotating shaft 131.

[0045] In this embodiment, the first bearing 23 is disposed in the hollow hole of the driven turntable 21, and the second bearing 24 is disposed inside the insertion hole 221 of the propeller 22. The two bearings are spaced apart in the axial direction, forming a "two-point support" structure. This structure can improve the radial stiffness of the propeller assembly 2 (including the driven turntable and the propeller) during rotation, effectively suppress radial runout and vibration that may be caused by magnetic fluctuations or water flow impact, and ensure smooth rotation.

[0046] Specifically, the propeller assembly also includes a fixed sleeve 25, which is mounted on the rotating shaft 131 and located between the first bearing 23 and the second bearing 24 to prevent axial displacement of the first bearing 23 and the second bearing 24 when the propeller assembly 2 rotates.

[0047] Specifically, such as Figure 3 As shown, the connecting plate 223 is provided with a bayonet 2231, and the driven turntable 21 is provided with a corresponding retaining ring 212. Through the cooperation of the bayonet 2231 and the retaining ring 212, a detachable fixed connection between the propeller 22 and the driven turntable 21 is realized. This snap-fit ​​connection structure ensures that the propeller 22 and the driven turntable 21 can be quickly and reliably disassembled, so as to facilitate the replacement of the propeller 22.

[0048] Specifically, the connecting plate 223 is provided with a positioning post 2232, and the driven turntable 21 is provided with a corresponding positioning hole. Through the insertion and cooperation of the positioning post 2232 and the positioning hole, it is not only convenient to quickly align and connect during assembly, but also to provide a reliable torque transmission path during rotation.

[0049] Specifically, such as Figure 2 As shown, the drive turntable 12 is provided with a plurality of first receiving cavities 123, the first magnet 121 is located in the first receiving cavity 123, a third receiving cavity 124 is provided in the gap between at least one of the first receiving cavities 123, the third magnet 122 is located in the third receiving cavity 124, the driven turntable 21 is provided with a second receiving cavity corresponding to the first receiving cavity 123, and the second magnet 211 is located in the second receiving cavity.

[0050] Specifically, such as Figure 2 As shown, the motor assembly 1 also includes a fixing disk 14. The fixing disk 14 has a fixing protrusion on the side facing the drive turntable 12 that corresponds to the positions of the first receiving cavity 123 and the third receiving cavity 124. The fixing disk 14 is fixedly connected to the drive turntable 12. The fixing protrusion extends into the first receiving cavity 123 and the third receiving cavity 124 to press and fix the first magnet 121 and the third magnet 122, thereby preventing the first magnet 121 and the third magnet 122 from shaking or even falling off when the drive turntable 12 rotates.

Claims

1. A propeller mechanism for preventing reverse insertion, characterized in that, A motor assembly and a propeller assembly, wherein the motor assembly is used to drive the propeller assembly to rotate; The motor assembly includes a drive motor, a drive turntable, and a sealed housing; the drive motor is fixed inside the sealed housing, and its output shaft is connected to the drive turntable to drive the drive turntable to rotate; the drive turntable has a plurality of first magnets evenly distributed around its circumference, and the first magnets are arranged with their N poles or S poles facing the propeller assembly; the sealed housing extends toward the propeller assembly at the position of the drive turntable axis to form a rotating shaft. The propeller assembly includes a driven turntable and a propeller; the driven turntable is connected to the propeller to form a synchronously rotating main body; the driven turntable has second magnets corresponding to the first magnet evenly distributed circumferentially, and the second magnets are arranged with their N pole or S pole facing the motor assembly; the driven turntable is annular, and the propeller has an insertion hole; the hollow hole of the driven turntable and the insertion hole of the propeller form a rotating hole; After the motor assembly and propeller assembly are assembled, the rotating hole is inserted into the rotating shaft and connected by magnetic attraction through the first magnet and the second magnet. A third magnet is disposed on the drive turntable in the gap between at least one of the first magnets.

2. The anti-reverse insertion propeller mechanism according to claim 1, characterized in that, The propeller includes blades, a connecting disc, and a connecting column; the blades are located on one side of the connecting column and are used to generate thrust in the water; the connecting disc is located on the other side of the connecting column and is detachably and fixedly connected to the driven turntable.

3. The anti-reverse insertion propeller mechanism according to claim 2, characterized in that, The propeller assembly includes a first bearing and a second bearing. The first bearing is disposed at the position of the hollow hole of the driven turntable. The outer ring of the first bearing mates with the inner wall of the hollow hole, and the inner ring of the first bearing mates with the shaft. The second bearing is disposed inside the insertion hole of the propeller. The outer ring of the second bearing mates with the inner wall of the insertion hole, and the inner ring of the second bearing mates with the shaft.

4. The anti-reverse insertion propeller mechanism according to claim 3, characterized in that, The propeller assembly also includes a fixed sleeve, which is sleeved on the rotating shaft and located between the first bearing and the second bearing; to prevent the first bearing and the second bearing from undergoing axial displacement when the propeller assembly rotates.

5. The anti-reverse insertion propeller mechanism according to claim 4, characterized in that, The connecting plate is provided with a bayonet, and the driven turntable is provided with a corresponding retaining ring. Through the cooperation of the bayonet and the retaining ring, a detachable and fixed connection between the propeller and the driven turntable is realized.

6. The anti-reverse insertion propeller mechanism according to claim 5, characterized in that, The connecting plate is provided with a positioning post, and the driven turntable is provided with a corresponding positioning hole, and the positioning post and the positioning hole are inserted into each other.

7. The anti-reverse insertion propeller mechanism according to claim 6, characterized in that, The drive turntable is provided with a plurality of first receiving cavities, the first magnet is located in the first receiving cavity, a third receiving cavity is provided in the gap between at least one of the first receiving cavities, the third magnet is located in the third receiving cavity, and the driven turntable is provided with a second receiving cavity corresponding to the first receiving cavity, the second magnet is located in the second receiving cavity.

8. The anti-reverse insertion propeller mechanism according to claim 7, characterized in that, The motor assembly also includes a fixing plate, and the fixing plate has a fixing protrusion on the side facing the drive turntable that corresponds to the positions of the first receiving cavity and the third receiving cavity. The fixing plate is fixedly connected to the drive turntable, and the fixing protrusion extends into the first receiving cavity and the third receiving cavity to press and fix the first magnet and the third magnet.

Images