CN216578910U

CN216578910U - Radiator fan metal middle tube coaxiality guaranteeing structure

Info

Publication number: CN216578910U
Application number: CN202123205835.5U
Authority: CN
Inventors: 郑焕章
Original assignee: Dongguan Yinhai Plastic Electronics Co ltd
Current assignee: Dongguan Yinhai Plastic Electronics Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-05-24
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a coaxiality guaranteeing structure of a metal middle pipe of a cooling fan, which comprises a plastic front mold, a plastic rear mold, a plastic front mold insert and a plastic rear mold insert, wherein a second groove is formed in the middle of the plastic front mold; the plastic front mold insert comprises an upper insert, a middle insert and a lower insert, the surface of the upper insert is respectively connected with the check ring and one end of the metal middle pipe, and the metal middle pipe and the like are nested on the outer surface of the middle insert. This structure through set up the metal well pipe between plastic front mould and plastic rear mould, can make the shaft hole concentricity at metal well pipe both ends keep highly uniform, and then guarantees follow-up assembly and guarantee the transmission with the axle center on the fan, reduces because the turning degree of difficulty causes the problem that fan machining yields is low.

Description

Radiator fan metal middle tube coaxiality guaranteeing structure

Technical Field

The utility model relates to the technical field of cooling fans, in particular to a coaxiality guarantee structure of a metal middle pipe of a cooling fan.

Background

The heat radiation fan is applied to equipment such as computers, photoelectric products, automotive electronic equipment, exchangers, medical equipment, sound equipment, environmental protection equipment and the like, and is used for radiating parts heated in the equipment, so that the equipment can work better. The metal middle pipe is an essential part in the cooling fan and plays a vital role in the work of the cooling fan.

The metal middle tube of the plastic fan frame in the existing cooling fan industry is generally manufactured by adopting a turning forming scheme, and the problem of poor finished fan products is caused because the concentricity deviation of front and back bearing holes is caused by the difficulty in controlling the turning precision in the machining process, so that the novel method of the non-concentricity of the front and back bearing holes of the metal middle tube of the cooling fan is caused, the quality of the finished cooling fan products is greatly reduced, and the reject ratio of the finished cooling fan products is reduced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a coaxiality guarantee structure of a metal-in-metal pipe of a cooling fan, and aims to solve the problems in the background art.

(II) technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme: a coaxiality guaranteeing structure of a metal middle pipe of a cooling fan comprises a plastic front mold, a plastic rear mold, a plastic front mold insert and a plastic rear mold insert, wherein a second groove is formed in the middle of the plastic front mold, the plastic front mold insert, a check ring and a metal middle pipe are respectively arranged in the middle of the second groove, the plastic rear mold insert is arranged at one end, away from the plastic front mold insert, of the metal middle pipe, and the plastic rear mold insert is arranged in the middle of the plastic rear mold;

the plastic front mold insert comprises an upper insert, a middle insert and a lower insert, the surface of the upper insert is respectively connected with a grid baffle ring and one end of a metal middle pipe, the outer surface of the middle insert is nested with the metal middle pipe, and the outer surface of the metal middle pipe is nested with the grid baffle ring.

As a preferred embodiment of the structure for ensuring the coaxiality of the metal middle tube of the cooling fan, the plastic rear mold insert is provided with a first groove in the middle, the lower insert is inserted into the middle of the first groove, and a through hole is reserved between one end of the plastic rear mold insert, which is close to the lower insert, and the surface of the middle insert.

As a preferable scheme of the coaxiality guaranteeing structure of the metal middle tube of the cooling fan, the lower insert and the first groove are equal in size.

As a preferable scheme of the coaxiality guaranteeing structure of the metal middle pipe of the cooling fan, an injection molding hole is formed in the surface of the metal middle pipe and communicated with the through hole.

As a preferable scheme of the coaxiality guaranteeing structure of the metal middle pipe of the cooling fan, a sealing ring is arranged at one end, close to the plastic rear mold, of the metal middle pipe.

As a preferred embodiment of the coaxiality guaranteeing structure of the metal middle tube of the cooling fan, the plastic front mold is connected with the plastic rear mold, the surface of the plastic rear mold is provided with a plastic groove, and an inner cavity of the plastic groove is provided with a plastic layer.

(III) advantageous effects

The utility model provides a coaxiality guarantee structure of a metal-in-metal pipe of a cooling fan. The method has the following beneficial effects:

this radiator fan metal well pipe axiality guarantee structure, through locating the logical shaft hole with the first turning of metal well pipe, spacing the metal well pipe after and between plastic mold insert at the plastic front mould mold insert, and form the through-hole of certain distance between plastic front mould mold insert and the plastic mold insert, the mode that the injection hole on using the metal well pipe to pour into the plastic is divided into two independent shaft holes with the shaft hole of metal well pipe, can avoid causing the phenomenon of the fan copper well pipe front and back afforestation hole decentraction because of turning both ends shaft hole respectively, can guarantee the concentricity in both ends shaft hole to the at utmost, and then make it when installing fan axle head use, make the long-time high efficiency operation of radiator fan finished product have no abnormal sound, improve the off-the-shelf quality of radiator fan, increase radiator fan's life.

Drawings

FIG. 1 is a schematic view of an overall structure of an embodiment of a metal-in-metal tube coaxiality guarantee structure of a cooling fan according to the present invention;

FIG. 2 is an exploded view of an embodiment of a metal-in-metal tube coaxiality assurance structure of a cooling fan according to the present invention;

FIG. 3 is a cross-sectional view of an embodiment of a metal-in-tube coaxiality assurance structure of a cooling fan according to the present invention;

fig. 4 is a schematic partial structural view of an embodiment of a coaxiality guaranteeing structure of a metal-in-metal pipe of a cooling fan according to the present invention.

In the figure, a plastic front mold-1, a plastic rear mold-2, a plastic rear mold insert-3, a metal middle pipe-4, a plastic front mold insert-5, an upper insert-501, a middle insert-502, a lower insert-503, a plastic layer-6, a plastic groove-7, a first groove-8, an injection molding hole-9, a sealing ring-10, a second groove-11, a check ring-12 and a through hole-13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1-4 are schematic structural diagrams illustrating a first embodiment of a coaxiality guaranteeing structure of a metal middle tube of a cooling fan according to the present invention, and please refer to fig. 1-4, the coaxiality guaranteeing structure of the metal middle tube of the cooling fan according to the present embodiment includes a plastic front mold 1, a plastic rear mold 2, a plastic front mold insert 5, and a plastic rear mold insert 3, wherein a second groove 11 is formed in the middle of the plastic front mold 1, the plastic front mold insert 5, a blocking ring 12, and the metal middle tube 4 are respectively disposed in the middle of the second groove 11, the plastic rear mold insert 3 is disposed at one end of the metal middle tube 4 away from the plastic front mold insert 5, and the plastic rear mold insert 3 is disposed in the middle of the plastic rear mold 2;

the plastic front mold insert 5 comprises an upper insert 501, a middle insert 502 and a lower insert 503, wherein the surface of the upper insert 501 is respectively connected with a check ring 12 and one end of a metal middle pipe 4, the outer surface of the middle insert 502 is nested with the metal middle pipe 4, and the outer surface of the metal middle pipe 4 is nested with the check ring 12.

The middle part of the plastic rear mold insert 3 is provided with a first groove 8, the middle part of the first groove 8 is inserted into the lower insert 503, and a through hole 13 is reserved between one end of the plastic rear mold insert 3 close to the lower insert 503 and the surface of the middle insert 502.

The lower insert 503 is the same size as the first recess 8.

The surface of the metal middle pipe 4 is provided with an injection molding hole 9, and the injection molding hole 9 is communicated with the through hole 13.

And a sealing ring 10 is arranged at one end of the metal middle pipe 4 close to the plastic rear mold 2.

The plastic front mold 1 is connected with the plastic rear mold 2, a plastic groove 7 is formed in the surface of the plastic rear mold 2, and a plastic layer 6 is arranged in the inner cavity of the plastic groove 7.

With reference to fig. 1 to 4, the coaxiality guaranteeing structure of the metal-in-metal pipe of the cooling fan in the embodiment has the following specific working principle: when the coaxiality guaranteeing structure of the metal middle pipe of the cooling fan is applied, firstly, a cylindrical workpiece is turned, the turned part is communicated with the workpiece and forms the metal middle pipe 4 through a coaxial through hole, an injection molding hole 9 is formed in the side wall of the workpiece, then the metal middle pipe 4 is placed into a second groove 11 of a plastic front mold 1, the front end plane of the metal middle pipe 4 is attached to the surface of an upper insert 501, the metal middle pipe 4 is limited by a check ring 12 and a middle insert 502, a plastic rear mold insert 3 on a plastic rear mold 2 is inserted into the middle part of the metal middle pipe 4, a lower insert 503 is inserted into a first groove 8 on the plastic rear mold insert 3, a through hole 13 is formed among the plastic rear mold insert 3, the middle insert 502 and the metal middle pipe 4, then a worker injects plastic into a plastic groove 7 on the surface of the plastic rear mold 2 by using an injection molding machine, and the plastic in a molten state passes through the injection molding hole 9 on the metal middle pipe 4, pour into the plastic into through-hole 13, two shaft holes around the through-hole in the middle of the metal well pipe 4 was distinguished this moment, and preceding shaft hole is the same with back shaft hole axle center completely this moment, whole plastic process of moulding plastics is accomplished to the die sinking after the cooling, this radiator fan metal well pipe axiality guarantee structure, can guarantee completely that the axiality control in two shaft holes in the metal well pipe 4 behind the injection moulding is in 0.001mm within range, it guarantees the axiality of radiator fan front and back ball in the at utmost when carrying out back process assembly ball operation. The problem that the shaft hole is eccentric and caused by separately turning the shaft hole in the prior art is reduced, and the finished cooling fan is free of abnormal sound in long-time high-efficiency operation.

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a radiator fan metal well pipe axiality guarantee structure, mould (2), plastic front mould mold insert (5) and plastic back mould mold insert (3) behind mould (1), plastic, its characterized in that behind mould (1): a second groove (11) is formed in the middle of the plastic front mold (1), a plastic front mold insert (5), a check ring (12) and a metal middle pipe (4) are respectively arranged in the middle of the second groove (11), a plastic rear mold insert (3) is arranged at one end, away from the plastic front mold insert (5), of the metal middle pipe (4), and the plastic rear mold insert (3) is arranged in the middle of the plastic rear mold (2);

the plastic front mold insert (5) comprises an upper insert (501), a middle insert (502) and a lower insert (503), the surface of the upper insert (501) is respectively connected with a grid baffle ring (12) and one end of a metal middle pipe (4), the outer surface of the middle insert (502) is nested with the metal middle pipe (4), and the outer surface of the metal middle pipe (4) is nested with the grid baffle ring (12).

2. The coaxiality guarantee structure of the metal-in-metal pipe of the cooling fan as claimed in claim 1, wherein: a first groove (8) is formed in the middle of the plastic rear mold insert (3), a lower insert (503) is inserted into the middle of the first groove (8), and a through hole (13) is reserved between one end, close to the lower insert (503), of the plastic rear mold insert (3) and the surface of the middle insert (502).

3. The coaxiality guarantee structure of the metal-in-metal pipe of the cooling fan as claimed in claim 1, wherein: the lower insert (503) and the first groove (8) are equal in size.

4. The coaxiality guarantee structure of the metal-in-metal pipe of the cooling fan as claimed in claim 1, wherein: the surface of the metal middle pipe (4) is provided with an injection molding hole (9), and the injection molding hole (9) is communicated with the through hole (13).

5. The coaxiality guarantee structure of the metal-in-metal pipe of the cooling fan as claimed in claim 1, wherein: and a sealing ring (10) is arranged at one end of the metal middle pipe (4) close to the plastic rear mold (2).

6. The coaxiality guarantee structure of the metal-in-metal pipe of the cooling fan as claimed in claim 1, wherein: the plastic front mold (1) is connected with the plastic rear mold (2), a plastic groove (7) is formed in the surface of the plastic rear mold (2), and a plastic layer (6) is arranged in the inner cavity of the plastic groove (7).