Fan impeller

Abstract

The present invention relates to a fan wheel, which comprises a hub, a plurality of fan blades and an annular metal body, and wherein, the fan blades are connected with the outer circumferential surface of the hub. The hub is provided with a top cover part, an annular wall part and a shaft lever base; wherein, the annular wall part is axially bent from the periphery of the top cover part; the top cover part and the annular wall part jointly round an interior space; and the shaft lever base is arranged at an axial position on the hub and positioned in the interior space. Moreover, the thickness of the annular wall part is less than the thickness of the top cover part, so that the annular metal body can be easily correspondingly and tightly assembled in the interior space.

Description

technical field [0001] The invention 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 . Background technique [0002] Existing fan wheels, such as China Taiwan Announcement No. 562332 "Magnet Ring Fixed Structure of the Rotor" new patent, please refer to figure 1 , 2 As shown, one of the rotors 7 includes a hub 71 and several blades 72, the blades 72 are arranged on the outer peripheral surface of a ring wall 711 of the hub 71, and a shaft 73 is correspondingly fixed on the shaft of the hub 71 In addition, the thickness of the top of the hub 71 is the same as the thickness of the ring wall 711 of the hub 71, and the inner wall 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 t...

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, the above-mentioned existing fan wheel has the following disadvantages, for example: because the top of the wheel hub 71 usually must have sufficient 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 occur, and because the thickness of the ring wall 711 of the hub 71 is the same as the thickness of the top of the 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 inner wall surface is provided with the joint rib 712 to provide plastic deformation capacity through the joint rib 712, so that the metal ring 8 is tightly fitted in the ring wall 711, so that the metal ring 8 needs to be specially processed. The two ends of the metal ring 8 are formed with different outer diameters, so the existing fan wheel needs more pre-assembly processing operations, and increases the difficulty of manufacturing

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