CN201763635U

CN201763635U - Small power motor plastic fan with convenient assembly and disassembly

Info

Publication number: CN201763635U
Application number: CN2010201927619U
Authority: CN
Inventors: 徐东升; 徐东山
Original assignee: 徐东旭
Priority date: 2010-05-18
Filing date: 2010-05-18
Publication date: 2011-03-16
Anticipated expiration: 2020-05-18

Abstract

The utility model relates to a plastic fan which is convenient to assemble and disassembly and is installed on a small power motor, in particular to a single-phase motor shaft end and used for motor heat dissipation. The utility model changes an enforceable press mounting method of being directly in interference fit to machinery into a way of fastening treatment after dynamic matching or transition matching assembly, thereby avoiding loss of maintenance, disassembly and scrap caused by plastic ageing.

Description

A kind of low-power machine plastic fan easy to loading and unloading

Technical field:

The utility model relates to a kind of easy to loading and unloading, is installed in low-power machine, and particularly the single phase motor axle head is the plastic fan of motor radiating use.

Background technique:

That plastic article have is in light weight, can the processing of injection moulding without cutting etc. characteristics, some power of modern production are not king-sized motors, particularly single phase motor uses the plastics straight forming to make radiation fan usually.Owing to lay particular stress on the factor of minimizing cost, take simple interference fit usually, directly fan is assembled in the rotating shaft of motor.Fig. 1 and Fig. 2 have described the fan of modern electrical machine industry two kinds of plastics straight formings commonly used, with the structure of the direct mating part of machine shaft.

This interference fit is taked the pressing method of mechanical forced, when needing to dismantle under desirable condition, no doubt can directly use simple tool to force to separate; Because aging (the unavoidable often overheated ageing process that will speed up of motor operation course rotating shaft) of plastic material nature, certainly also have many factors to cause fan material or otherwise variation, though under normal circumstances can not influence operation function, if but in a single day needed dismounting to keep in repair the result of motor, just could only be to scrap the fan that more renews.

Summary of the invention:

The purpose of this utility model exactly on the basis that seldom increases cost, provides a kind of can the dismounting repeatedly easily and the plastic fan of the low-power machine of unlikely damage.

Realizing the technical measures of invention, is cancellation plastic fan and motor shaft end interference fit without doubt, must directly push or drive in the mode of installation; Change the way of looser cooperation (movingly or transition fit) the assembling fastening processing in back into.The simplest way is to use pin or bolt directly radially to run through fan shown in Figure 1 and rotating shaft mating part (referring to Fig. 3 and Fig. 5), and the latter has better fastening effect than the former; Better way is to use the plastic fan (referring to Fig. 4) of the clamping mode structure of clamping bolt shrinkage fit position circumference.

Description of drawings:

The schematic representation that Fig. 1 cooperates with motor shaft end for the plastic fan that cuts circular location;

Fig. 2 carries the schematic representation that the positioning key plastic fan cooperates with motor shaft end;

Fig. 3 runs through the schematic representation that the plastic fan of location cooperates with motor shaft end for pin;

The schematic representation that Fig. 4 cooperates with motor shaft end for the plastic fan that uses clamping bolt to shrink the clamping mode structure of circumference;

The schematic representation that the plastic fan that Fig. 5 locatees for bolt-through cooperates with motor shaft end;

Fig. 6 cooperates integrally-built schematic representation behind the construction bolt for the plastic fan of bolt-through location with motor shaft end.

More than all figure ignore fan blade etc. and belong to background technique and related little part with the matching part technical order.

Fig. 7 is the schematic representation of the plastic fan complete structure of the clamping mode structure of use clamping bolt shrinkage fit circumference;

Fig. 8 is the side view of Fig. 7.

Fig. 9 is the dorsal view of Fig. 7.

The unified numbering of each figure is described as follows:

1 is the cross section of fan end motor shaft, 2 is plastic fan and motor shaft mating part, and 3 are penetration hole radially, and 4 is positioning dowel, 5 is opening clip compact form plastic fan and motor matching part, 6 is the clamp screw mounting hole, and 7 are nut installation shrinkage pool, and 8 are fan blade (8A is that vacuum side of blade extends), 9 is the fan blade chassis, 10 is clearance gap, and 11 is clamping bolt, and 12 is binding nut.

Embodiment:

Further introduce the concrete mode of execution of the utility model below in conjunction with accompanying drawing:

Embodiment one: clamping bolt runs through installs the plastic fan that cuts circular location

The plastic fan that the clamping bolt of Fig. 5 signal runs through, structural feature with the motor shaft end matching part, be to cut a circle position handle one with the supporting installation shrinkage pool 7 of nut profile, when being installed, fan directly binding nut 12 is put into shrinkage pool, bolt 11 is tightened (Fig. 6) from the other end insertion of penetration hole, and the extruding circumference is finished the installation process of fan and the fastening location of motor shaft.

Embodiment two: clamping bolt shrinks the plastic fan of circumference clamping motor rotating shaft

Fig. 7 depicts the plastic fan complete structure of the clamping mode structure that uses clamping bolt shrinkage fit circumference.Wherein with motor shaft end mating part and Fig. 4 roughly the same, select transition fit like a cork hand assembled to motor shaft, when fan is installed binding nut is put into shrinkage pool 7, owing to there is clearance gap 10, insert in mounting hole 6 in the clamping bolt rundown process, the mating part circumference evenly shrinks the tightly identical motor shaft of integral body and forms substantial interference fit state.

Claims

1. low-power machine plastic fan easy to loading and unloading is characterized in that: fan and machine shaft adopt movingly or the transition fit assembling, use to run through the pin location or clamping bolt carries out fastening processing.

2. according to the described low-power machine plastic fan easy to loading and unloading of claim 1, use runs through the clamping bolt clutch features and is: cutting a circle position has the installation shrinkage pool supporting with the nut profile.

3. according to the described low-power machine plastic fan easy to loading and unloading of claim 1, it is characterized in that: leave clearance gap with machine shaft matching part circumference, use clamping bolt to shrink circumference and clamp.