CN103840597A

CN103840597A - Waterproof structure for motor

Info

Publication number: CN103840597A
Application number: CN201310438996.XA
Authority: CN
Inventors: 三成贵浩; 竹岛丰
Original assignee: Sumitomo Heavy Industries Ltd
Current assignee: Sumitomo Heavy Industries Ltd
Priority date: 2012-11-26
Filing date: 2013-09-24
Publication date: 2014-06-04
Anticipated expiration: 2033-09-24
Also published as: JP6046466B2; CN103840597B; DE102013016354A1; JP2014107909A

Abstract

The invention provides a waterproof structure for a motor which can be easily installed to be used for a waterproof component. The waterproof structure has a motor shaft (12) which is supported to a flange (14) through a bearing (16). A V-shaped ring (20) is configured to seal a gap between the flange (14)and the motor shaft (12). A cover portion (42) is extended outward from the motor shaft (12) in a radial direction, and is configured to cover the V-shaped ring (20). A V-shaped ring cover (42) is fitted to the motor shaft (12), and is prevented from moving in an axial direction.

Description

The waterproof construction of motor

Technical field

The application advocates the priority of No. 2012-257923rd, Japanese patent application based on November 26th, 2012 application.The full content of its application is by reference to being applied in this specification.

The present invention relates to a kind of waterproof construction of motor.

Background technology

In patent documentation 1, disclose, by carrying out the water-tight device of anti-sealing to the inner infiltration of motor forming labyrinth type sealing ring than the inner side water-stop sheet of Bearing support shaft end side and support one and the outside water-stop sheet that is installed on rotating shaft.

Patent documentation 1: Japan opens clear 63-77448 communique in fact

Use the water-tight device of labyrinth type sealing ring as above have the making of the parts that are used to form labyrinth type sealing ring and cumbersome problem is installed.

Summary of the invention

The present invention completes in light of this situation, and its object is to provide a kind of light installation to relate to the waterproof construction of the motor of the parts of waterproof.

The waterproof construction of the motor of a certain mode of the present invention, it possesses: frame parts; Motor drive shaft, is supported on frame parts through bearing; Seal member, the gap between seal frame parts and motor drive shaft; And cover, extend from motor drive shaft to radial outside and cover seal member, wherein, cover is embedded in motor drive shaft outward, and moves axially and be restricted.

According to which, by adopting, the cover of protection seal member is embedded in to the structure on motor drive shaft outward, the installment work of cover becomes easy, and without screw or the thread mill drilling prepared for mounting cover parts, therefore cost of manufacture reduces.

In addition, by the combination in any of above constitutive requirements and constitutive requirements of the present invention and performance, the technology of mutually replacing between method, Apparatus and system etc. is also effective as mode of the present invention.

According to the present invention, provide a kind of light installation to relate to the waterproof construction of the motor of the parts of waterproof.

Accompanying drawing explanation

Fig. 1 is the cutaway view with the motor of the related waterproof construction of prior art.

Fig. 2 is the cutaway view with the motor of the related waterproof construction of one embodiment of the present invention.

In figure: 10-motor, 12-motor drive shaft, 14-flange, 16-bearing, 18-fan, 20-V type ring, 30-framework, 32-fan guard, 42-V type ring cowling.

Embodiment

Fig. 1 is the cutaway view when motor 50 with the related waterproof construction of prior art is cut off with the vertical plane that comprises central shaft.

Motor 50 is cage induction motor, but can be also other forms of motor, for example, have the syncmotor (IPM motor) of imbedding the structure of permanent magnet at internal rotor.

The electromagnetic steel plate of stator 34 stacked multiple lamellar (for example thickness 0.5mm) that carry out molding with same shape and forming.Stator 34 is entrenched in the interior week of framework 30 by for example shrink fit.Be formed on multiple slits of stator 34 and be wound with coil 38.

Rotor 36 is stacked too to carry out the multiple laminal electromagnetic steel plate of molding and forms with same shape.Be formed in the multiple slits inside on rotor 36 and be cast with the conductors such as such as aluminium, this conductor forms short-circuited conducting sleeve 37 in the upper and lower end face of rotor.The internal side diameter of rotor 36 is fixed on motor drive shaft 12 by interference fit.

Framework 30 is for example die casting aluminum, cast iron system or steel plate system, the effect to motor external cooling by the heat producing in rotor and stator etc. when having the weight of supporting rotor and stator.In order to improve heat dispersion, be provided with the multiple fin (not shown) that extend to the direction parallel with motor drive shaft in the periphery of framework 30.In addition, symbol 40 is terminal box.

Motor drive shaft 12 is rotatably freely supported on the flange 14 stretching out to internal side diameter from framework 30 through bearing 16.Flange 14 can be integrally formed with framework 30, also can after each self-forming, be fixed on framework 30.

The shaft end side of motor drive shaft 12 disposes fan 18.Fan 18 is made up of the multiple blade 18B that are fixed on the cylindrical portion 18A of motor shaft end by screw 26 and stretch out to radial outside from cylindrical portion 18A.The further outside of fan 18 disposes fan guard 32.

If motor 50 turns round, fan 18 together rotates with motor drive shaft 12.By this rotation, extraneous gas is inhaled into by fan guard 32, extraneous gas is supplied in fin by the gap 31 between fan guard 32 and framework 30, thus cooling motor.

Motor 50 is disposed at when outdoor, the problem that exists water and dust etc. to enter motor inside via the sliding part of the gap 17 between flange 14 and motor drive shaft 12 and bearing 16.Therefore, and gap between flange 14 and motor drive shaft 12 17 in abutting connection with and configuration V-type ring 20 and makes the lip 20A of V-type ring 20 be connected to the load opposite sides 14A of flange 14 and seal clearance 17.

Entirety is annular, and has and coordinate the size of V-type ring 20 and the V-type ring cowling 22 of bending bend 22A is anchored on by screw 24 on the load opposite sides 14A of flange 14 at internal side diameter.V-type ring cowling 22 prevents that water droplet etc. from directly dripping on V-type ring 20, and minimizing and the water of V-type loop contacts and the amount of dust, thereby improves its protective value.

As shown in Figure 1, the covering tightly in the structure in the load opposite sides that is fixed in flange of V-type ring will be covered, need to carry out fastening and so on the flow chart of the processing of the screwed hole to flange or V-type ring cowling.Therefore, in one embodiment of the present invention, provide a kind of waterproof construction that can carry out more simply the motor of the installation of V-type ring cowling.

Fig. 2 is the cutaway view when motor 10 with the related waterproof construction of one embodiment of the present invention is cut off with the vertical plane that comprises central shaft.Motor 10 is except the content of following explanation, for possessing the cage induction motor of identical structure with motor 50 illustrated in fig. 1.

V-type ring cowling 42 entirety are annular, and become therein footpath side and have the metallic plate (for example steel plate) of cylindrical portion 42A for punch process.V-type ring cowling 42 has disc face and extends from cylindrical portion 42A to radial outside and the bend 42B to the bending of V-type ring side in the position of slightly growing than the thickness radially of V-type ring 20.Disc face is further stretched out to radial outside from bend 42B, and and the load opposite sides 14A of flange 14 between across gap 43 and opposed.V-type ring cowling 42 prevents that water droplet etc. from directly dripping on V-type ring 20, and minimizing and the water of V-type loop contacts and the amount of dust, thereby improves its protective value.

V-type ring cowling 42 is not anchored on the load opposite sides 14A of flange 14 as shown in Figure 1, but the cylindrical portion 42A of internal side diameter is embedded in motor drive shaft 12 outward.Therefore,, without fastening and so on the operation of carrying out the processing of the screwed hole to flange 14 and V-type ring cowling, the installation of V-type ring cowling is simplified.

In order to limit moving axially of V-type ring cowling 42 in the rotation of motor drive shaft 12, preferably the cylindrical portion 42A interference fit of V-type ring cowling 42 is in motor drive shaft 12.Replacing also can be by the cylindrical portion 42A matched in clearance of V-type ring cowling 42 after motor drive shaft 12, the axial both sides of cylindrical portion 42A are clamped by the load-side end face of the cylindrical portion 18A of fan 18 and the load opposition side end face of V-type ring 20, thereby limit moving axially of V-type ring cowling 42.Also can jointly use the interference fit of V-type ring cowling and by the clamping of fan and V-type ring.

By V-type ring cowling 42 is fixed on to motor drive shaft 12, in the time of motor running, V-type ring cowling 42 together rotates with motor drive shaft 12.Therefore, the water and the dust that are attached to V-type ring cowling 42 get rid of by the rotation of cover, therefore exist water and dust etc. to be difficult to the advantage entering by the gap 43 between flange 14 and V-type ring cowling 42.

Between the bend 42B of V-type ring cowling 42 and V-type ring 20, divide and have circular space 44.By injecting lubricating grease in this space 44 and using as lubricating grease storage portion, thus can further anti-sealing and dust be invaded the gap 17 between flange 14 and motor drive shaft 12 effectively.

As described above, according to present embodiment, by adopting the waterproof construction that the V-type ring cowling of protection V-type ring is embedded in to motor drive shaft outward, the installment work of V-type ring becomes easy.Due to without preparing screw or thread mill drilling for mounting cover parts, therefore cost of manufacture reduces.And, the V-type ring cowling during by motor running get rid of effect, waterproof/anti-dust performance of motor improves.

Above, embodiments of the present invention are illustrated.It will be understood by those skilled in the art that these execution modes, for illustrating, can have various variation, and this variation also within the scope of the invention in their combination of each constitutive requirements.For example, seal member is not limited to V-type ring, can be also various seal members.

In addition, above-mentioned waterproof construction is not only applicable to motor, can also be applicable to have the whirligig that is supported on the rotating shaft of frame parts through bearing.

Claims

1. a waterproof construction for motor, is characterized in that, possesses:

Frame parts;

Motor drive shaft, is supported on described frame parts through bearing;

Seal member, seals the gap between described frame parts and described motor drive shaft; And

Cover, extends from described motor drive shaft to radial outside and covers described seal member,

Described cover is embedded in described motor drive shaft outward, and moves axially and be restricted.

2. the waterproof construction of motor according to claim 1, is characterized in that,

Described cover and described motor drive shaft interference fit.

3. the waterproof construction of motor according to claim 1 and 2, is characterized in that,

Also possess the fan of the shaft end side that is fixed on described motor drive shaft,

Described cover is held between described fan and described seal member.

4. according to the waterproof construction of the motor described in any one in claim 1～3, it is characterized in that,

Described cover have than described seal member more by radial outside to the bend of described seal member lateral bend,

Lubricating grease is held in the space of being divided by described seal member and described bend.