Double-layer fan with reinforcing cylinder

Abstract

The double-layer fan comprises a motor provided with a rotating shaft and a fan blade assembly arranged on the rotating shaft in a penetrating mode, the fan blade assembly comprises a wheel rim arranged on the rotating shaft in a penetrating mode, first blades arranged on the periphery of the wheel rim and an end cover matched with the tail end of the rotating shaft, and second blades are further arranged on the end cover. A connecting end piece is formed on the side, close to the end cover, of the rim, a center shaft sleeve arranged on the rotating shaft in a sleeving mode and a reinforcing cylinder arranged on the periphery of the center shaft sleeve are further arranged in the rim, and the reinforcing cylinder is connected to the rim through the connecting end piece. The air supply device has the advantages of strong wind power in the central area, simple structure, strong air supply stability, high mechanical strength and higher durability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric fan, concretely relates to a double-layer fan with reinforcing cylinder. BACKGROUND

[0002] At present, the electric fan on the market still mainly has single-layer single-circle or single-layer multi-circle fan blades. For the single-layer multi-circle fan blades, the problems such as the lack of wind power in the center area of the fan blades corresponding to the wheel rim, the instability of the wheel rim due to the large size of the outer expansion, and the poor air supply stability cannot be solved. Therefore, the structure of multi-layer fan blades begins to appear in the prior art, which can generate airflow at different distances to make up for the lack of wind power in the center area of the fan blades, but it will cause the structure of the wheel rim to be heavy and the air supply force to be insufficient.

[0003] To solve the above-mentioned problems such as poor air supply stability of the fan blades, lack of center wind power, and heavy structure of the wheel rim, a few manufacturers have tried to develop double-layer fans with reinforcing cylinders. For example, in the Chinese utility model patent with the title of "upper fan head dismounting structure" and the authorization announcement number of CN221442905U, on the one hand, the structure is complex and the dismounting operation is cumbersome by separately setting a fan blade cavity to isolate the laminated fan blades; on the other hand, only the main fan blades can be rotated to blow air to the soft wind blades to drive them to rotate, which cannot fundamentally solve the problem of lack of wind power in the center area. Moreover, once the main fan blades rotate at high speed, the structure design of the wheel rim cannot ensure that the fan blades have higher air supply stability.

[0004] For another example, the Chinese utility model patent with the title of "double-wing multi-layer fan blade electric fan" and the authorization announcement number of CN205172998U, which includes a motor, at least one set of fan blades arranged on the rotating shaft of the motor, and a locking nut arranged on the rotating shaft of the motor. The fan blades include a fan rim and a plurality of first blades arranged on the fan rim, and the locking nut is provided with a plurality of second blades. The technical solution of the utility model patent, although the laminated fan blade structure is used to make up for the lack of wind power in the center area and the heavy structure of the wheel rim, still cannot ensure the air supply stability of the fan blades. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a double-layer fan with reinforcing cylinder, which has strong center wind power, simple structure, strong air supply stability, high mechanical strength, and better durability.

[0006] This application provides a double-layer fan with a reinforcing cylinder, including a motor with a rotating shaft and a fan blade assembly passing through the rotating shaft. The fan blade assembly includes a rim passing through the rotating shaft, a first blade disposed on the outer periphery of the rim, and an end cap that cooperates with the end of the rotating shaft. The end cap also has a second blade. A connecting end member is formed on the side of the rim near the end cap. The rim also has a central bushing sleeved on the rotating shaft and a reinforcing cylinder disposed around the central bushing. The reinforcing cylinder is connected to the rim through the connecting end member.

[0007] The wheel rim may also include reinforcing spokes extending radially outward from the outer periphery of the reinforcing cylinder. The reinforcing cylinder can be connected to the wheel rim via the reinforcing spokes. The reinforcing spokes may have clearance notches. The connecting end member may also have a countersunk platform, and the reinforcing spokes may have stepped edges that mate with the countersunk platform. The wheel rim may also include at least one of a connecting rib and a connecting shaft surface. The central bushing may be connected to the reinforcing cylinder via the connecting rib and the connecting shaft surface. The connecting rib may extend radially outward from the outer periphery of the central bushing. The connecting rib may have a reinforcing wing at at least one side of the connecting shaft surface away from the connecting shaft surface and connected to the central bushing. The reinforcing wing may be triangular or trapezoidal. At least one side of the connecting shaft surface may also have a rib ring at the end connected to the reinforcing cylinder, and the connecting rib may have stepped edges that mate with the rib ring.

[0008] According to the technical solution described in this utility model, the following beneficial effects are achieved: Both the fan blades and end caps are mounted on the rotating shaft, resulting in a simple structure that is easy to disassemble and maintain; the layered effect formed between the first blade on the fan blades and the second blade on the end cap effectively solves the problem of insufficient wind power in the central area; the reinforcing cylinder connected to the wheel rim via the connecting end piece improves the mechanical strength of the wheel rim, effectively ensuring the structural stability of the wheel rim once the fan blades rotate at high speed; the connecting end piece forms a recessed platform, which on the one hand limits the end cap to prevent sudden jumps, and on the other hand further improves the mechanical strength of the wheel rim. The setting of the reinforcing plate increases the connection strength between the reinforcing cylinder and the wheel rim, further improving the mechanical strength of the wheel rim and ensuring the stability of air delivery. The central bushing is connected to the reinforcing cylinder via connecting ribs and / or connecting shaft surface, further improving the connection strength between the central bushing and the reinforcing cylinder; the connecting shaft surface and the connecting end piece are not in the same plane, thus enhancing the overall mechanical strength of the wheel rim in different dimensions. The connecting ribs are located on one or both sides of the connecting shaft surface, further improving the mechanical strength. The reinforced wing design also improves the connection strength between the connecting stiffener and the central bushing. The rib rings act as reinforcing ribs, further enhancing mechanical strength. Attached Figure Description

[0009] Figure 1 This is an exploded view of the electric fan section of this application.

[0010] Figure 2 for Figure 1 Enlarged view of section A.

[0011] Figure 3 This is a schematic diagram of the front view of the back of the fan blade.

[0012] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0013] Figure 5 This is a schematic diagram of the side structure of the fan blade.

[0014] Figure 6 for Figure 5 Enlarged view of section C.

[0015] Figure 7 This is a schematic diagram of the side structure of the fan blade at another angle.

[0016] Figure 8 for Figure 7 Enlarged view of section D in the middle.

[0017] Figure 9 This is a schematic diagram of the front view of the fan blade.

[0018] 1 Motor, 11 Shaft, 2 Fan Blade, 21 Wheel Rim, 211 Central Shaft Sleeve, 212 Reinforcing Cylinder, 213 Reinforcing Spoke Plate, 22 First Blade, 3 End Cap, 31 Second Blade, M Connecting End Piece, T Sinking Platform, X Connecting Rib Plate, Y Connecting Shaft Surface, L Rib Ring, W Reinforcing Wing, Q Relief Notch. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0020] See Figures 1-9As shown in the figure, a double-layer fan with a reinforcing cylinder comprises a motor 1 provided with a rotating shaft 11, and a fan blade assembly arranged on the rotating shaft 11. The fan blade assembly comprises at least one fan blade 2 and an end cover 3 matched with the end of the rotating shaft 11. The fan blade assembly comprises a rim 21 arranged on the rotating shaft 11 and a first blade 22 arranged on the outer periphery of the rim 21, and the end cover 3 is further provided with a second blade 31. The rim 21 is formed with a connecting end piece M, such as a connecting plate or a connecting rod, on the side close to the end cover 3. The rim 21 is further provided with a central shaft sleeve 211 sleeved on the rotating shaft 11 and a reinforcing cylinder 212 arranged on the outer periphery of the central shaft sleeve 211. The reinforcing cylinder 212 is connected to the rim 21 through the connecting end piece M, and the connecting end piece M is further formed with a sunken platform T. Preferably, the motor 1 is a direct current motor. In the present application, the fan blade and the end cover are arranged on the rotating shaft, and the electric fan has a simple structure and is convenient for disassembly, maintenance and repair. The laminating effect between the first blade on the fan blade and the second blade on the end cover can well solve the problem of wind power deficiency in the central area. The reinforcing cylinder connected to the rim through the connecting end piece can improve the mechanical strength of the rim, and can effectively ensure the structural stability of the rim once the fan blade rotates at a high speed. In the present application, the connecting end piece is formed with a sunken platform, which can limit the end cover to prevent sudden jumping, and the edge of the sunken platform is similar to a reinforcing rib, which can further improve the mechanical strength of the rim.

[0021] As shown in the figure, Figures 3-8 As shown in the figure, the rim 21 is further provided with reinforcing spokes 213 extending outward in the radial direction from the outer periphery of the reinforcing cylinder 212. The reinforcing cylinder 212 is connected to the rim 21 through the reinforcing spokes 213. In the present application, the reinforcing spokes make the connection between the reinforcing cylinder and the rim stronger, further improve the mechanical strength of the rim, and ensure the stability of air supply. The reinforcing spokes 213 can be further provided with a gap Q. In the present application, the reinforcing spokes are provided with a gap, so as to give way to part of the structure of the motor when the fan blade rotates. Figure 5 、 6 As shown in the figure, the reinforcing spokes 213 are further provided with a stepped edge matched with the sunken platform T. This kind of structure design further improves the structural strength.

[0022] As shown in the figure, Figure 1 、 3 As shown in the figure, the rim 21 is further provided with at least one of a connecting rib plate X and a connecting shaft surface Y. The central shaft sleeve 211 is connected to the reinforcing cylinder 212 through the connecting rib plate X and the connecting shaft surface Y. The connecting shaft surface Y and the connecting end piece M can not be in the same plane. In the present application, the central shaft sleeve is connected to the reinforcing cylinder through the connecting rib plate and the connecting shaft surface, which further improves the connection strength between the central shaft sleeve and the reinforcing cylinder, makes the structure more stable, and avoids the shaking of the fan blade during rotation. In the present application, the connecting shaft surface and the connecting end piece are not in the same plane, so as to enhance the overall mechanical strength of the rim in different dimensions.

[0023] Referring to Figure 1 、 3 Fig. 6, the connecting rib X extends radially outward from the outer periphery of the central shaft sleeve 211, and is located on one side or both sides of the connecting shaft surface Y. Preferably, to further enhance the connecting strength between the central shaft sleeve and the reinforcing cylinder, the connecting rib X is located on both sides of the connecting shaft surface Y. Referring to Figures 5-8 Fig. 7, the connecting rib X is located on at least one side of the connecting shaft surface Y, and is provided with a reinforcing wing W at the end away from the connecting shaft surface Y and connected to the central shaft sleeve 211. Preferably, to facilitate mold opening, in the case where the connecting rib X is located on both sides of the connecting shaft surface Y, the connecting rib X is only provided with a reinforcing wing W at the end away from the connecting shaft surface Y and connected to the central shaft sleeve 211 on one side of the connecting shaft surface Y. Referring to Figures 5-8 Fig. 8, the reinforcing wing W is triangular or trapezoidal in shape as a whole.

[0024] Referring to Figures 3-6 Fig. 9, at least one side of the connecting shaft surface Y is further formed with a rib ring L on the periphery of the end connected to the reinforcing cylinder 212. In the present application, the rib ring plays the role of a reinforcing rib, thereby further improving the mechanical strength. Referring to Figures 3-6 Fig. 10, the connecting rib X is further provided with a stepped edge matched with the rib ring L.

[0025] Although the specific embodiments of the present application have been described above, those skilled in the art can make changes to it without departing from the spirit and principles of the present application, and the protection scope of the present application is defined by the claims and their equivalents.

Claims

1. A double-layer fan with a reinforcing cylinder, comprising a motor with a rotating shaft, and a fan blade assembly passing through the rotating shaft, the fan blade assembly comprising a rim passing through the rotating shaft, a first blade disposed on the outer periphery of the rim, and an end cap cooperating with the end of the rotating shaft, the end cap further comprising a second blade, characterized in that: The wheel rim is formed with a connecting end piece at one side close to the end cover, and further provided with a central shaft sleeve sleeved on the rotating shaft and a reinforcing cylinder arranged at the periphery of the central shaft sleeve, the reinforcing cylinder being connected to the wheel rim through the connecting end piece.

2. The double layer fan with a reinforcing cylinder according to claim 1, characterized in that: The wheel rim is further provided with reinforcing spokes extending radially outward from the periphery of the reinforcing cylinder, the reinforcing cylinder being connected to the wheel rim through the reinforcing spokes.

3. The double layer fan with a reinforcing cylinder according to claim 2, characterized in that: The reinforcing spokes are provided with clearance notches.

4. The double layer fan with a reinforcing cylinder according to claim 2, characterized in that: The connecting end piece is further formed with a sunken platform, and the reinforcing spokes are provided with stepped edges matched with the sunken platform.

5. The double layer fan with a reinforcing cylinder according to any one of claims 1 to 4, characterized in that: The wheel rim further comprises at least one of a connecting rib plate and a connecting shaft surface, the central shaft sleeve being connected to the reinforcing cylinder through the connecting rib plate and the connecting shaft surface.

6. The double layer fan with a reinforcing cylinder according to claim 5, characterized in that: The connecting rib plate extends radially outward from the periphery of the central shaft sleeve.

7. The double layer fan with a reinforcing cylinder according to claim 6, characterized in that: The connecting rib plate is provided with reinforcing wings at one end away from the connecting shaft surface and connected to the central shaft sleeve.

8. The double layer fan with a reinforcing cylinder according to claim 7, characterized in that: The reinforcing wings are triangular or trapezoidal.

9. The double layer fan with a reinforcing cylinder according to claim 5, characterized in that: At least one side of the connecting shaft surface is further provided with a rib ring at the end connected to the reinforcing cylinder.

10. The double layer fan with a reinforcing cylinder according to claim 9, characterized in that: The connecting rib plate is further provided with stepped edges matched with the rib ring.

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