CN210003559U

CN210003559U - axial-flow fan blade and air conditioner with same

Info

Publication number: CN210003559U
Application number: CN201920537192.8U
Authority: CN
Inventors: 刘新怀; 王万宏; 张新明
Original assignee: Guangdong Langdi Grint Electric Appliance Co Ltd
Current assignee: Guangdong Langdi Grint Electric Appliance Co Ltd
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2020-01-31
Anticipated expiration: 2029-04-18

Abstract

The utility model relates to a fan blade field especially relates to axial fan blade, and have air conditioner of this axial fan blade kind of axial fan blade, including axle sleeve, wheel hub and a plurality of blade, the axle sleeve is connected on wheel hub's central part, and a plurality of blades set up around wheel hub circumference equiangular regular interval, be equipped with the location step face on the outside terminal surface of axle sleeve, the inboard of location step face is equipped with the connecting wall, the tip sets up on the location step face in the wheel hub, and the upper end of connecting wall is rolled over the back and is covered on the up end of tip in the wheel hub to through the riveting fixed.

Description

axial-flow fan blade and air conditioner with same

Technical Field

The utility model relates to a fan blade field especially relates to axial compressor fan blade, and has the air conditioner of this axial compressor fan blade.

Background

The axial flow fan has a very high application range of , namely, the axial flow fan is airflow in the same direction as the axis of the fan blade, such as an electric fan, and an air conditioner external fan is an axial flow type running fan, so the axial flow fan is called as axial flow, because the air flows parallel to the axis of the fan.

As shown in fig. 1 to 3, the shaft sleeve 1 and the hub 2 of the metal axial-flow fan blade in the axial-flow fan blade are both made of metal steel, and in order to ensure the strength, full welding (full welding in the circumferential direction of the shaft sleeve) is usually performed by welding, or a welding point is added to ensure the strength. However, the scheme has the following two disadvantages: 1. the welding can cause the local heating of the hub 2 and the shaft sleeve 1 to be overhigh, concentrated internal stress is generated, the cracking and fission of the hub are caused, and potential safety hazards exist for the operation of the fan blades. 2. Because the metal axial flow fan blade is exposed outdoors in a long term and is used in a region with serious coastal corrosion, the original rust-proof protective layer of the shaft sleeve 1 and the wheel hub 2 is damaged after welding, and the corrosion is accelerated.

Disclosure of Invention

In order to solve the problem, the utility model discloses an aim at provides kinds of axial compressor fan blades, has adopted stamping process, has realized that the riveting replaces welding mode to reach the joint strength requirement, the utility model discloses a second aim at provides kinds of air conditioners that have this axial compressor fan blade.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

axial flow fan blade, which comprises a shaft sleeve, a hub and a plurality of blades, wherein the shaft sleeve is connected to the central part of the hub, the blades are arranged around the hub in regular intervals with equal angle, the axial flow fan blade is characterized in that the outer side end face of the shaft sleeve is provided with a positioning step face, the inner side of the positioning step face is provided with a connecting wall, the inner end part of the hub is arranged on the positioning step face, and the upper end part of the connecting wall is folded and then covers the upper end face of the inner end part of the hub and is fixed by riveting.

Compared with the technical scheme, if the groove is not arranged and the turnover section of the connecting wall is pressed into the groove, the insufficient connection strength of the hub and the shaft sleeve is easily caused, when the axial flow fan blade rotates at high speed, the shaft sleeve drives the hub and the blades on the hub to rotate only by the rivet, so that the rivet is easily broken to cause slippage between the hub and the shaft sleeve, and the scheme is favorable for improving the connection strength of the hub and the shaft sleeve.

Preferably, the shaft sleeve comprises a bottom shaft section and a top shaft section which is connected with the bottom shaft section in a body mode, the outer diameter of the bottom shaft section is larger than that of the top shaft section and forms the positioning step surface, the top shaft section is located on the inner side of the connecting wall, a clearance groove is formed between the top shaft section and the connecting wall, and the shaft end surface of the top shaft section is higher than a riveting surface formed by the connecting wall and the inner end portion of the hub after being folded.

Preferably, a plurality of connecting parts are arranged on the outer side of the hub, and the connecting parts are regularly arranged along the axial center circumference of the hub; and each connecting part is fixedly connected with a blade.

air conditioner, comprising the axial flow fan blade of any item.

The above technical scheme is adopted in the utility model, this technical scheme relates to kinds of axial fan blades, and the air conditioner that has this axial fan blade, in traditional axial fan blade, axle sleeve and wheel hub welded fastening, there are two defects as the record in the background art, and the axial fan blade that this scheme provided, and the punching press technology has been adopted, realized riveting substitution welding mode and reached the joint strength requirement, particularly, the tip sets up back on the location step face in the wheel hub, cover on the up end of tip in the wheel hub after rolling over the upper end of connecting the wall through the punching press technology, then it is fixed through rivet connection, the rivet passes the section of rolling over of connecting the wall, squeeze into in the axle sleeve behind the wheel hub, realize consolidating.

Drawings

Fig. 1 is a schematic structural diagram of an axial flow fan in the prior art.

Fig. 2 is a sectional view a-a in fig. 1.

Fig. 3 is a partially enlarged view of fig. 2.

Fig. 4 is a schematic structural view of the axial flow fan in this embodiment.

Fig. 5 is a sectional view taken along line B-B in fig. 4.

Fig. 6 is a partially enlarged view of fig. 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Thus, a feature defined as "", "second" may or may not include or more of that feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like shall be construed to be , for example, as being either fixedly connected or detachably connected, or physically connected, mechanically connected or electrically connected, directly connected or indirectly connected through an intermediary, and communicating between two elements.

In the present disclosure, unless otherwise expressly stated or limited, "above" or "below" a second feature includes features directly contacting the second feature, and may also include features contacting the second feature not directly but through another feature in between, furthermore, features "above", "over" and "on" the second feature include features directly above and obliquely above the second feature, or merely indicate that feature is at a higher level than the second feature, features "below", "beneath" and "under" the second feature include features directly below and obliquely below the second feature, or merely indicate that feature is at a lower level than the second feature.

Example 1:

as shown in fig. 4 to 6, axial-flow fan blades include a shaft sleeve 1, a hub 2, and a plurality of blades 3, where the shaft sleeve 1 is connected to a central portion of the hub 2, the blades 3 are arranged around the hub 2 at regular intervals and at equal angles in a circumferential direction, specifically, a plurality of connecting portions 21 are arranged outside the hub 2, the connecting portions 21 are arranged at regular intervals in a circumferential direction along an axis of the hub 2, and each connecting portion 21 is fixedly connected with a blade 3, as shown in fig. 4, the axial-flow fan blade has three blades 3, and three connecting portions 21 are arranged outside the hub 2. the three-blade 3 scheme is only implementable schemes, and those skilled in the art can select three axial-flow fan blades as needed.

As shown in fig. 6, the shaft sleeve 1 includes a bottom shaft section 11, and a top shaft section 12 connected to the bottom shaft section 11 in a body , the outer diameter of the bottom shaft section 11 is larger than the outer diameter of the top shaft section 12, a positioning step 13 is provided on the outer side end surface of the shaft sleeve 1, the positioning step 13 is formed between the bottom shaft section 11 and the top shaft section 12, a connecting wall 14 is provided on the inner side of the positioning step 13, the inner end of the hub 2 is provided on the positioning step 13, the upper end of the connecting wall 14 is folded and folded to cover the upper end surface of the inner end of the hub 2, and is fixed by riveting.

In the embodiment of step , the top shaft section 12 is located inside the connecting wall 14, a clearance groove 16 is provided between the top shaft section 12 and the connecting wall 14, and the shaft end surface of the top shaft section 12 is higher than the riveting surface formed by the connecting wall 14 after being turned over and the inner end of the hub 2.

In the embodiment of step , a groove is provided on the upper end face of the inner end of the hub 2, at least part of the folded section 15 of the connecting wall 14 is pressed into the groove and is fixed by riveting, compared with the technical scheme, if the groove is not provided and the folded section 15 of the connecting wall 14 is pressed into the groove, the insufficient connection strength between the hub 2 and the shaft sleeve 1 is easily caused, when the axial flow fan blade rotates at high speed, the shaft sleeve 1 only drives the hub 2 and the blades 3 thereon to rotate by rivets, so that the rivets are easily broken to cause slippage between the hub 2 and the shaft sleeve 1, therefore, the scheme is beneficial to improving the connection strength between the hub 2 and the shaft sleeve 1.

Based on the above embodiment, during the processing of the axial flow fan blade, the shaft sleeve is firstly installed into the installation hole in the center of the hub from the bottom of the hub from bottom to top, then the stamping part extends into the clearance groove 16, the upper end part of the connecting wall 14 is folded and then covers the upper end surface of the inner end part of the hub 2, and the folding section 15 is pressed into the groove; the connection strength requirement can be met by replacing a welding mode between the hub 2 and the shaft sleeve 1 through a stamping welding mode, and the problems of cracking and fission of the hub 2 and damage of a protective layer caused by welding are avoided. When the axial flow fan blade is installed, a motor shaft extends into a shaft hole of the shaft sleeve 1 from the shaft end face of the top shaft section 12, the step of installing a thick gasket can be omitted due to the height of the top shaft section 12, assembly is simplified, and efficiency is improved.

Example 2:

the embodiment relates to air conditioners, which comprises the axial flow fan blade of any item in the embodiment 1.

In the description herein, reference to the terms " embodiments," " embodiments," "examples," "specific examples," or " examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least embodiments or examples of the invention.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

The axial flow fan blade is characterized in that a positioning step surface is arranged on the outer side end face of the shaft sleeve, a connecting wall is arranged on the inner side of the positioning step surface, the inner end portion of the hub is arranged on the positioning step surface, and the upper end portion of the connecting wall covers the upper end face of the inner end portion of the hub after being folded and is fixed through riveting.
2. The axial-flow fan blade as claimed in claim 1, wherein the hub has a recess on its upper end face, and at least of the folded-back segment of the connecting wall is pressed into the recess and fixed by riveting.
3. The axial-flow fan blade of claim 1, wherein the axle sleeve includes a bottom axial segment and a top axial segment integrally connected to the bottom axial segment, the bottom axial segment has an outer diameter greater than that of the top axial segment and forms the positioning step surface, the top axial segment is located inside the connecting wall, a clearance groove is provided between the top axial segment and the connecting wall, and the axial end surface of the top axial segment is higher than the riveting surface formed by the connecting wall after being turned over and the inner end of the hub.
4. The kinds of axial-flow fan blades of claim 1, wherein the hub has a plurality of connection portions on its outside, the connection portions are arranged regularly in the circumferential direction along the axis of the hub, and each connection portion is fixedly connected with a blade.
5, air conditioner, characterized by comprising the axial-flow fan blade of any of claims 1-4.