CN201096107Y - Fan wheel - Google Patents

Abstract

A fan wheel comprises a hub, a plurality of blades and a metal ring body, wherein the blades are connected to the outer peripheral surface of the hub. The hub is provided with a top cover part, a ring wall part and a shaft rod base, the ring wall part is axially bent to form the outer periphery of the top cover part, the top cover part and the ring wall part jointly surround to form an inner space, and the shaft rod base is arranged at the axis position of the hub and is positioned in the inner space. In addition, the thickness of the annular wall part is smaller than that of the top cover part, so that the metal annular body is easily assembled in the inner space in a corresponding and tight fit mode.

Description

fan wheel

technical field

The utility model relates to a fan wheel, in particular to a fan wheel which is easy to manufacture and saves materials by reducing the thickness of a ring wall part of a hub and making the thickness of the ring wall part smaller than the thickness of a top cover part of the hub. wheel.

Background technique

Existing fan wheels, such as the No. 562332 "rotor magnet ring fixed structure" patent in Taiwan, China, please refer to shown in Figures 1 and 2, wherein a rotor 7 includes a hub 71 and several blades 72, and the blades 72 The ring is arranged on the outer peripheral surface of a ring wall 711 of the hub 71, and a shaft 73 is correspondingly fixed at the axis position of the hub 71; in addition, the thickness of the top of the hub 71 is the same as that of the ring wall 711 of the hub 71 The thickness, and the inner wall surface of the ring wall 711 axially forms several joint ribs 712 . The outer diameter of a metal ring 8 gradually expands from a first end 81 of the metal ring 8 to a second end 82, and the first end 81 extends radially inward to form a ring lip 83, so that a magnet ring 9 When combined with the inner wall of the metal ring 8 , it can lean against the ring lip 83 .

Please refer to Figures 1 and 2 again, since the outer diameter of the first end 81 of the ferrule 8 is slightly smaller than the inner diameter formed by the combined rib 712 of the hub 71, and the outer diameter of the second end 82 is slightly larger than the inner diameter of the hub 71. The inner diameter formed by the combined rib 712 of the hub 71 is such that when the metal ring 8 is assembled into the rotor 7, the first end 81 of the metal ring 8 can be easily inserted into an inner space (not marked) surrounded by the ring wall 711. ); then, use external force to continuously embed the metal ring 8 into the internal space until the metal ring 8 is completely embedded in the hub 71, and at this time, the second end 82 of the metal ring 8 is positioned on each of the joints via a tight fit. Between the convex ribs 712, and then assembled into a finished plastic fan wheel.

In general, the above-mentioned existing fan wheel has the following disadvantages, for example: because the top of the wheel hub 71 usually must have enough thickness to avoid the fracture and damage of the bending part of the top of the wheel hub 71 near the axial center due to stress concentration situation occurs, and because the thickness of the ring wall 711 of the wheel hub 71 is the same as the thickness of the top of the wheel hub 71, it causes that the ring wall 711 is not easy to form a plastic diameter expansion to allow the metal ring 8 to enter, so it is necessary to add another ring wall 711 The joint rib 712 is provided on the inner wall surface of the joint rib 712 to provide plastic deformation capacity through the joint rib 712, so that the metal ring 8 is tightly fitted and positioned in the ring wall 711, so that the metal ring 8 needs special additional processing , so that the two ends of the metal ring 8 have different outer diameters, so the existing fan wheel needs more pre-assembly processing operations, and increases the difficulty of manufacturing. Based on the above reasons, it is indeed necessary to further improve the above-mentioned existing fan wheel.

new content

The utility model solves the above problems and provides a fan wheel. The thickness of the ring wall of the fan wheel is smaller than the thickness of the top cover, thereby reducing the thickness of the ring wall, thereby improving its plastic deformation ability, and facilitating the metal ring The body is assembled and embedded in a tightly fitting manner, so that the utility model is easy to manufacture, and at the same time has the effect of saving material consumption.

In order to achieve the above purpose, the technical solution provided by the utility model is: a fan wheel, comprising:

A hub; the hub has a top cover part, a ring wall part and a shaft base; the ring wall part is axially bent and formed on the outer peripheral edge of the top cover part, and the top cover part and the ring wall part jointly form a In the inner space, the shaft base is arranged at the axial center of the hub and located in the inner space; the thickness of the ring wall is smaller than the thickness of the top cover; several fan blades; the fan blades are connected to the outer peripheral surface of the hub; and a metal ring body; the metal ring body is correspondingly assembled in the inner space of the hub; and has an accommodating space; a ring magnet; the ring magnet is correspondingly assembled in the accommodating space; At least one positioning portion is protruded from the axial direction of the hub; the positioning portion abuts against the end of the metal ring body; the upper end of the metal ring body extends radially toward the axial direction of the metal ring body to form a ring lip against The upper end of the ring magnet.

Technical principles and beneficial effects of the utility model: the metal ring body of the utility model is assembled in the internal space of the wheel hub in a tight fit manner, and the ring magnet is correspondingly embedded in an accommodating space of the metal ring body; the metal ring body The outer diameter of the body is preferably slightly larger than the inner diameter of the inner space. Since the ring wall portion of the hub has a thickness relatively thinner than that of the top cover portion, the ring wall portion can provide a better plastic deformation corresponding to the metal ring body. ability, so that the metal ring body can be easily embedded and positioned in the inner space by means of a tight fit, and when the metal ring body is completely embedded in the inner space, the ring wall also provides an elastic restoring force to securely clamp the metal ring body fixed in the inner space, so that the metal ring body can close the ring magnet, so as to avoid magnetic flux leakage; at the same time, the metal ring body is used to support the inner wall surface of the ring wall, so that the metal ring body is relatively thinner than the ring wall. The thickness of the top cover part depends on the overall structural strength of the ring wall part; at the same time, because the utility model utilizes the reduction of the thickness of the ring wall part, the thickness of the ring wall part is less than the thickness of the top cover part, thereby reducing the thickness of the ring wall The overall weight of the part, thereby reducing the overall weight of the fan wheel, and at the same time further reducing the thickness error generated when the ring wall part is injection molded, avoiding the uneven weight of the outer peripheral edge of the hub, which can effectively improve the The balance accuracy of the fan wheel, while saving the materials consumed to form the hub; since the fan wheel of the utility model further abuts against a ring lip of the metal ring body from the upper end of the ring magnet, the ring lip is formed by the metal The upper end of the ring body is radially extended toward its axis, so as to bear against the upper end of the ring magnet, so that the ring magnet can be stably positioned in the accommodating space, and the diameter of the lower part of the inner wall surface of the ring wall is Extending toward the axis of the hub, at least one positioning portion is protruded so that the end of the metal ring body can abut against the positioning portion, thereby preventing the metal ring body from arbitrarily leaving the inner space of the hub. Thereby, the assembly reliability of the utility model is improved, and the service life of the fan wheel is prolonged.

Description of drawings

Figure 1: The cross-section and schematic diagram of the existing fan wheel when the metal ring is not embedded in the fan wheel;

Figure 2: A cross-sectional view of the metal ring embedded in the fan wheel of the existing fan wheel;

Figure 3: An exploded perspective view of the first embodiment of the fan wheel of the present invention;

Figure 4: An exploded cross-sectional view of the first embodiment of the fan wheel of the present invention;

Fig. 5: A combined sectional view of the first embodiment of the fan wheel of the present invention;

Fig. 6: A combined sectional view of the second embodiment of the fan wheel of the present invention.

Among them: 1--fan wheel; 11--wheel hub; 110--inner space; 111--top cover; 112--ring wall; 113--shaft base; 12--fan blade; 13-- Shaft; 2--metal ring body; 20--accommodating space; 21--ring lip; 3--ring magnet; 7--rotor; 71--hub; 711--ring wall; Rib; 72-blade; 73-shaft; 8-metal ring; 81-first end; 82-second end; 83-ring lip; 9-magnet ring; a-positioning part ; T1--the thickness of the top cover; T2--the thickness of the ring wall.

Detailed ways

In order to make the above-mentioned and other purposes, features and advantages of the present utility model more obvious and understandable, the preferred embodiments of the present utility model will be specifically cited below, together with the accompanying drawings, as follows:

Please refer to Figure 3, the first embodiment of the present utility model: the fan wheel 1 is made of a plastic material (such as polyphenylene sulfide, polypropylene, resin, polyetheretherketone, etc.) by injection molding. And it can be selected as an axial-flow fan wheel or a blower-type fan wheel. The fan wheel 1 of this embodiment is an axial-flow fan wheel as an example of implementation. The fan wheel 1 has a hub 11, several fan blades 12 and a shaft 13, the hub 11 is in the shape of a hollow cylinder; the fan blades 12 are connected to the outer peripheral surface of the hub 11 in an equidistant arrangement; The shaft 13 is coupled to the center of the hub 11 .

Please refer to Figures 3 and 4, the hub 11 of the first embodiment of the present invention has an internal space 110, a top cover portion 111, a ring wall portion 112 and a shaft base 113; the internal space 110 consists of the The top cover part 111 and the ring wall part 112 are surrounded and defined, which can be assembled and embedded by a metal ring body 2 and a ring magnet 3; the ring wall part 112 is axially downward from the outer peripheral edge of the top cover part 111 Formed by bending; the shaft base 113 is disposed at the axial center of the hub 11 and located in the inner space 110 for the joint positioning of the shaft 13 . In addition, the thickness T2 of the surrounding wall portion 112 is smaller than the thickness T1 of the top cover portion 111 .

Please refer to Figures 4 and 5, the metal ring body 2 of this embodiment is assembled in the inner space 110 of the hub 11 in a tight fit manner, and the ring magnet 3 is correspondingly embedded in an accommodating space 20 of the metal ring body 2 Among them, the upper end of the ring magnet 3 abuts against a ring lip 21 of the metal ring body 2, and the ring lip 21 is formed by extending radially from the upper end of the metal ring body 2 toward its axis, so as to support the The upper end of the ring magnet 3, thereby making the ring magnet 3 firmly positioned in the accommodating space 20; the outer diameter of the metal ring body 2 is preferably slightly larger than the inner diameter of the inner space 110, because the ring wall of the hub 11 The portion 112 has a thickness T2 that is relatively thinner than that of the top cover portion 111, so that the ring wall portion 112 can provide a better plastic deformation capability corresponding to the metal ring body 2, so that the metal ring body 2 can be easily embedded and positioned by a tight fit. In the inner space 110, and when the metal ring body 2 is completely embedded in the inner space 110, the ring wall part 112 also provides an elastic restoring force to firmly fix the metal ring body 2 in the inner space 110, by This makes the metal ring body 2 close the ring magnet 3 to avoid magnetic flux leakage; at the same time, the metal ring body 2 is used to support the inner wall surface of the ring wall portion 112, thereby strengthening the structure with a relatively thinner ring than the top cover portion. The overall structural strength of the ring wall portion 112 with the thickness T2 of 111.

Please refer to Figures 4 and 5 again, since the utility model utilizes reducing the thickness T2 of the ring wall portion 112, making the thickness T2 of the ring wall portion 112 smaller than the thickness T1 of the top cover portion 111, thus reducing the thickness of the ring wall portion 112, thereby reducing the overall weight of the fan wheel 1, further reducing the thickness error produced when the ring wall portion 112 is injection molded, and avoiding the uneven weight of the outer peripheral edge of the hub 11, so that The balance accuracy of the fan wheel 1 is effectively improved, and the materials consumed for forming the hub 11 are saved at the same time.

Please refer to FIG. 6 , which discloses the fan wheel according to the second embodiment of the present invention. Compared with the first embodiment, the fan wheel of the second embodiment further extends radially from the lower part of the inner wall surface of the ring wall part 112 toward the axial direction of the hub 1 to protrude at least one positioning part a for the metal ring The end of the body 2 is correspondingly against the positioning portion a, thereby preventing the metal ring body 2 from arbitrarily detaching from the inner space 110 of the hub 1 . Thereby, the assembly reliability of the present invention is improved, and the service life of the fan wheel 1 is prolonged.

As mentioned above, compared with the existing fan wheel in Figs. 1 and 2, different outer diameters are formed at the two ends of the metal ring 8, so that a first end 81 of the metal ring 8 can be easily assembled on a hub 71 In an internal space of the hub 71 and the metal ring 8, more assembly and pre-processing operations are required, resulting in disadvantages such as difficulty in manufacturing. The utility model of Fig. 4 reduces the thickness T2 of the ring wall portion 112 by making the thickness T2 of the ring wall portion 112 of the fan wheel 1 smaller than the thickness T1 of the top cover portion 111 of the fan wheel 1, thereby improving its plasticity The deformability allows the metal ring body 2 to fit tightly into the inner space 110 surrounded by the ring wall portion 112 , which indeed simplifies the manufacturing process and simultaneously saves material consumption.

Claims (3)

1. A fan wheel, characterized in that: the fan wheel includes: A hub; the hub has a top cover, a ring wall and a shaft base; the ring wall is axially bent and formed on the outer periphery of the top cover, and the top cover part and the ring wall part together form an inner space, the shaft base is set at the axis position of the hub and is located in the inner space; the thickness of the ring wall part is smaller than that of the top cover part thickness; a plurality of fan blades; said fan blades are connected to the outer peripheral surface of the hub; and A metal ring body; the metal ring body is correspondingly assembled in the inner space of the hub; and has an accommodating space; A ring magnet; the ring magnet is correspondingly assembled in the accommodating space. 2. The fan wheel according to claim 1, characterized in that: the lower part of the inner wall surface of the ring wall extends radially toward the axial center of the hub, and at least one positioning part is protruded; the positioning part against the end of the metal ring. 3. The fan wheel according to claim 1 or 2, characterized in that: the upper end of the metal ring extends radially toward the axial direction of the metal ring to form a ring lip against the ring magnet. upper end.

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