Fan blade rear mounting structure

Abstract

A fan blade rear mounting structure relates to the fan technical field, including fan blade body, the rotating member is arranged on the fan blade disc, the rotating member includes the slip ring member fixed on the fan blade disc mounting hole, the rotating part, the rotating part is positioned on the slip ring member and rotates relative to the slip ring member, spring is connected between the rotating part and the swing piece, non-circular hole is arranged on the rotating axis of the rotating part, the matching non-circular column is arranged on the fan blade body, and the non-circular column is inlaid on the non-circular hole and is fixed by screw, so that the fan blade body rear mounting is fixed on the rotating part.The utility model discloses compared with prior art, the fan storage, the advantage that the logistics cost is low.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to the rear-mounted structure of fan blades. Background Technology

[0002] As disclosed in patent 202422675312.4, the fan blade limiting mechanism of the fan capable of storing fan blades includes a turntable, fan blades rotatably mounted on the turntable, a gasket between the rotating part of the fan blade and the turntable, a guide groove on the rotating part of the fan blade, and a guide post on the gasket corresponding to the guide groove. Since the assembly of this patented technology requires professional skills, it needs to be assembled in a factory. The assembled fan blade part includes fan blades, a turntable, a spring, and a ring-shaped object, resulting in a large component with a complex shape, requiring relatively large packaging, and leading to high storage and logistics costs. Summary of the Invention

[0003] The purpose of this utility model is to provide a fan blade retrofit structure with low storage and logistics costs.

[0004] This utility model is implemented as follows: The device includes a fan blade body and a rotating component mounted on the fan blade disk. The rotating component includes a slip ring component fixed on the mounting hole of the fan blade disk and a rotating part. The rotating part is positioned on the slip ring component and rotates relative to the slip ring component. A spring connects the rotating part and the oscillating part. A non-circular hole is provided on the rotation axis of the rotating part. A matching non-circular post is provided on the fan blade body. The non-circular post is embedded in the non-circular hole and fixed with screws, so that the fan blade body is subsequently fixed on the rotating part.

[0005] Preferably, the slip ring component includes an upper slip ring and a lower slip ring respectively positioned at both ends of the fan blade disk mounting hole. The rotating component includes an upper rotating part rotatably mounted on the upper slip ring and a lower rotating part rotatably mounted on the lower slip ring. At least one of the middle portions of the upper rotating part and the lower rotating part is provided with a short shaft, which rotatably passes through the holes of the upper slip ring and the lower slip ring. The upper rotating part and the lower rotating part are connected together, so that the upper rotating part and the lower rotating part are respectively positioned on the outside of the upper slip ring and the lower slip ring. The short shaft allows the upper rotating part and the lower rotating part to be rotatably mounted on the upper slip ring and the lower slip ring. A non-circular hole is provided in the middle portion of the upper rotating part. A non-circular post matching the non-circular hole is provided at the connecting end of the fan blade body. The non-circular post passes through the middle portion of the lower rotating part and is inserted into the non-circular hole provided in the middle portion of the upper rotating part and connected in the non-circular hole. A spring connects the upper rotating part and the oscillating part.

[0006] By employing rotating component technology, the rotating parts requiring high-skill assembly, along with the fan blade disk, can be pre-assembled in the factory. Since the volume and shape of the fan blade disk with the assembled rotating components are not significantly different from a standalone fan blade disk, and there are no obvious protrusions, the space of standard packaging can be fully utilized when packaging the fan's support rod, motor, fan blade disk, and fan blades, effectively reducing the overall packaging volume. Simultaneously, the assembly of the high-skill rotating components and fan blade disk is completed in the factory. Fan blade installation only requires inserting the non-circular post at the connecting end of the fan blade body through the middle of the lower rotating component and into the non-circular hole in the middle of the upper rotating component, then tightening the screws. This requires low skill, while the installation of the fan blades, which requires only low skill, is left to the user. Therefore, packaging the fan's support rod, motor, fan blade disk, and fan blades separately fully utilizes the space of standard packaging, effectively reducing the overall packaging volume. The smaller packaging space facilitates transportation and warehousing, thus effectively saving logistics costs.

[0007] Compared with existing technologies, this invention has the advantages of low storage and logistics costs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the rear-mounted fan blade structure of this utility model; Figure 2 An exploded view of the rotating component from another perspective.

[0009] Figure labeling: A-Connection point; B-Spring connection point; C-Rotation axis; 1-Hanging rod; 2-Motor; 3-Fan blade disk; 301-Helmet-shaped center; 302-Helmet brim; 5-Fan blade limiting mechanism; 501-Arc-shaped groove; 502-Protrusion; 6-Spring; 8-Fan blade body; 801-Non-circular column; 9-Rotating component; 901-Upper sliding ring; 902-Lower sliding ring; 903-Upper rotating component; 904-Lower rotating component; 905-Short shaft; 906-Inlay block; 907-Inlay opening; 908-Inlay notch; 909-Pin; 910-Pin hole; 911-Screw hole; 912-Non-circular hole; 913-Threaded hole; 10-Mounting hole; 11-Spring hook column; 12-Spring hook hole; 15-Lamp holder; 16-Quadrilateral ring. Detailed Implementation

[0010] The rear-mounted fan blade structure of this utility model will now be described in further detail with reference to the accompanying drawings and embodiments: like Figure 1 , 2As shown, the fan blade rear-mounted structure of this utility model includes a suspension rod 1, a motor 2 connected to the bottom end of the suspension rod 1, a fan blade disk 3 driven by the rotating shaft of the motor 2, and two or more fan blades symmetrically rotatably connected to the fan blade disk 3. A swinging component is provided, with a number of connection points A equal to the number of fan blades on the swinging component. Spring connection points B are provided on the fan blades. Springs 6 connect each connection point A on the swinging component to the matching spring connection points B on the fan blades. The fan blades are characterized by a fan blade body 8 and a rotating component 9 mounted on the fan blade disk 3. The rotating component 9 includes a slip ring component fixed to the mounting hole 10 of the fan blade disk and a rotating part. The rotating part is positioned on the slip ring component and rotates relative to it. Springs 6 connect the rotating part and the swinging component. A non-circular hole 912 is provided on the rotation axis of the rotating part. A matching non-circular post 801 is provided on the fan blade body 8. The non-circular post 901 is embedded in the non-circular hole 912 and fixed with screws, thus rear-mounting the fan blade body 8 onto the rotating component.

[0011] The slip ring component includes an upper slip ring 901 and a lower slip ring 902, which are respectively positioned at both ends of the mounting holes 10 of the fan blade disk 3. The rotating component includes an upper rotating member 903 rotatably mounted on the upper slip ring 901 and a lower rotating member 904 rotatably mounted on the lower slip ring 902. The inner side of the upper rotating member 903 rests against the outer side of the upper slip ring 901, and the inner side of the lower rotating member 904 rests against the outer side of the lower slip ring 902. At least one of the inner middle parts of the upper rotating member 903 and the lower rotating member 904 is provided with a short shaft 905 (in the embodiment, both the inner middle parts of the upper rotating member 903 and the inner middle parts of the lower rotating member 904 are provided with short shafts 905). The short shaft 905 rotatably passes through the hole in the upper slip ring 901 and the lower slip ring 902. On the holes, the upper slip ring 901 and the lower slip ring 902 have symmetrically positioned insert blocks 906 and insert openings 907 on their opposite sides. Two insert recesses 908 are provided inside the fan blade disk 3 mounting holes 9 corresponding to the insert blocks 906 of the upper slip ring 901 and the lower slip ring 902. The insert block 906 of the upper slip ring 901 passes through one insert recess 908 and is inserted into the insert opening 907 of the lower slip ring 902. The insert block 906 of the lower slip ring 902 passes through the other insert recess 908 and is inserted into the insert opening 907 of the upper slip ring 901. Due to the stopping action of the insert recesses 908, the connected upper slip ring 901 and lower slip ring 902 cannot rotate within the fan blade disk 3 mounting holes 9. After the upper rotating part 903 and the lower rotating part 904 are positioned and connected by pin 909 and pin hole 910, they are then fixed together by screws (not shown in the figure) passing through screw hole 911, so that the upper rotating part 903 and the lower rotating part 904 are respectively positioned on the outside of upper slip ring 901 and lower slip ring 902. Through short shaft 905, the upper rotating part 903 and the lower rotating part 904 are rotatably mounted on upper slip ring 901 and lower slip ring 902. A non-circular hole 912 is provided in the middle of the inner side of the upper rotating part 903. A non-circular post 801 is provided at the connecting end of the fan blade body 8 corresponding to the non-circular hole 912. The non-circular post 801 passes through the middle of the lower rotating part 904 and is inserted into the non-circular hole 912 in the middle of the inner side of the upper rotating part 903. The fan blade limiting mechanism 5 is fixedly connected to the non-circular hole 912 by a screw (not shown in the figure) that passes through the non-circular post 801 and is screwed into the threaded hole 913 at the bottom of the non-circular hole 912 (which may be a nut embedded in the bottom of the non-circular hole 912). The spring 6 is connected between the spring hook post 11 of the upper rotating member 903 and the spring hook hole 12 of the swing member (rod 7). The fan blade limiting mechanism 5 includes an arc-shaped groove 501 provided on the wall of the hole 902 of the upper sliding ring 901 and the lower sliding ring, and a protrusion 502 provided on the outer wall of the short shaft 905. The arc-shaped groove 501 limits the sliding distance of the protrusion 502, thereby limiting the rotation angle of the upper rotating member 903 and the lower rotating member 904, thereby limiting the unfolding or retracting position of the fan blade body 8. Since the fan blades rotate along the axis of rotation C when they unfold, one end of the spring 6 will also rotate along the spring connection point B. Moreover, the radius of rotation is large. A spring hook post 11 is used so that one of the ring-shaped ends of the spring 6 is sleeved on the spring hook post 11, so that the spring hook post 11 and one of the ring-shaped ends of the spring 6 can rotate smoothly relative to each other, ensuring that the fan blades unfold smoothly. The other end of the spring 6 swings less relative to the connection point A on the swinging component. A spring hook hole 12 is used so that the other end of the spring 6 can be hooked onto the spring hook hole 12. Similarly, this can ensure that the other end of the spring 6 swings smoothly relative to the connection point A on the swinging component. When the fan that can retract its fan blades is not working, under the action of the spring 6 and the fan blade limiting mechanism 5 set at the rotating end of the fan blades, the fan blades are in a retracted state. The rotation axis C of the two fan blades, the spring connection point B of the two springs 6 on the fan blades, and the connection point A of the two springs 6 on the rod 7 are all on a straight line. The distance from the spring connection point B of the spring 6 on the fan blades to the connection point A of the spring 6 on the rod 7 is the smallest. At this time, the protrusion 502 stops at one end of the arc-shaped groove 501.

[0012] When the fan that can retract its blades is working, under the action of centrifugal force, the fan blades unfold, driving the upper rotating part 903 and the lower rotating part 904 to rotate against the tension of the spring 6, causing the protrusion 502 to move away from one end of the arc-shaped groove 501 to the other end. At this time, the forces on the fan blades include centrifugal force, the tension of the spring 6, and wind resistance. Due to the manufacturing technology of the fan blades, the weight of each fan blade will be different, and these differences will lead to dynamic imbalance. During the unfolding process of the fan blades, the dynamic balance will be automatically adjusted by the unfolding range of the fan blades. Because the fan blades are made of lightweight plastic, they are lightweight and have low centrifugal force. The fan blades will not unfold to the limit position at the same time (i.e., the protrusion 502 moves and moves against the other end of the arc-shaped groove 501). Even if the weights of the fan blades are different, dynamic balance can be achieved by the different unfolding amplitudes of the fan blades, which means that adaptive dynamic balance can be achieved.

[0013] Preferably, a lamp holder 15 (disc-shaped object) for mounting an electric light source is provided. The lamp holder 15 is located below the fan blade disk 3 and is connected to the motor shaft 7. A spring 6 connects the rotating component 9 and the oscillating component, which is located between the fan blade disk 3 and the lamp holder 15. The lamp holder 15 serves two purposes: firstly, it provides illumination, enriching the fan's functionality; secondly, the interaction between the fan blades and the lamp holder 15 enhances the aesthetics of the lower part of the fan.

[0014] Preferably, the oscillating component is an equal quadrilateral ring 16, and the fan blade disk 3 is cap-shaped. The central part 301 of the cap is a dome-shaped structure for accommodating the motor 2. The brim 302 of the cap-shaped fan blade disk 3 is approximately square in shape, and the mounting holes 10 of the fan blade disk 3 are located at the four corners of the brim 302 of the approximately square fan blade disk 3. By using a cap-shaped fan blade disk 3, the various components are effectively protected, preventing them from being exposed and damaged. Furthermore, the components are also effectively decorated, enhancing the overall aesthetics of the fan.

Claims

1. A rear-mounted structure for fan blades, characterized in that, The device includes a fan blade body and a rotating component mounted on the fan blade disk. The rotating component includes a slip ring component fixed on the mounting hole of the fan blade disk and a rotating part. The rotating part is positioned on the slip ring component and rotates relative to the slip ring component. A spring connects the rotating part and the oscillating part. A non-circular hole is provided on the rotation axis of the rotating part. A matching non-circular post is provided on the fan blade body. The non-circular post is embedded in the non-circular hole and fixed with screws, so that the fan blade body is subsequently fixed on the rotating part.

2. The fan blade rear-mounted structure according to claim 1, characterized in that, The slip ring component includes an upper slip ring and a lower slip ring, which are respectively positioned at both ends of the mounting hole of the fan blade disk. The rotating component includes an upper rotating part rotatably mounted on the upper slip ring and a lower rotating part rotatably mounted on the lower slip ring. At least one of the middle parts of the upper rotating part and the lower rotating part is provided with a short shaft. The short shaft is rotatably connected to the hole of the upper slip ring and the lower slip ring. The upper rotating part and the lower rotating part are connected together, so that the upper rotating part and the lower rotating part are respectively positioned on the outside of the upper slip ring and the lower slip ring. The short shaft allows the upper rotating part and the lower rotating part to be rotatably mounted on the upper slip ring and the lower slip ring. A non-circular hole is provided in the middle of the upper rotating part. A non-circular post matching the non-circular hole is provided at the connecting end of the fan blade body. The non-circular post passes through the middle of the lower rotating part and is inserted into the non-circular hole provided in the middle of the upper rotating part and connected in the non-circular hole. A spring is connected between the upper rotating part and the oscillating part.

3. The fan blade rear-mounted structure according to claim 2, characterized in that, A fan blade limiting mechanism is provided, which includes an arc-shaped groove on the hole wall of the upper and lower sliding rings and a protrusion on the outer wall of the short shaft. The arc-shaped groove limits the sliding distance of the protrusion, thereby limiting the rotation angle of the upper and lower rotating parts, and thus limiting the position of the fan blade body when unfolded or retracted.

4. The fan blade rear-mounted structure according to claim 2 or 3, characterized in that, After the upper and lower rotating parts are positioned and connected by pins and pin holes, they are then fixed together by screws passing through screw holes. The upper and lower rotating parts are rotatably mounted on the upper and lower sliding rings by a short shaft.

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