CN106663988A

CN106663988A - Motor and ventilation fan

Info

Publication number: CN106663988A
Application number: CN201480081755.7A
Authority: CN
Inventors: 冈田顺二; 中村拓也; 桐原达也
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2014-10-21
Filing date: 2014-10-21
Publication date: 2017-05-10
Anticipated expiration: 2034-10-21
Also published as: JP6177454B2; WO2016063347A1; CN106663988B; DE112014007081T5; JPWO2016063347A1

Abstract

The motor is provided with: a stator (3) having a cylindrical shape; a frame body which accommodates the stator (3) therein; a rotor disposed inside the stator (3); a shaft coupled to the rotor and extending along a central axis of the stator; a 1 st bearing provided on one side along the central axis with respect to the rotor and holding the shaft to be rotatable about the central axis; a bracket (7) which is provided on the opposite side of the rotor with a bearing interposed therebetween and holds the bearing; a base plate (9) provided on the opposite side of the bearing with the bracket (7) therebetween; a position detection unit which is mounted on the substrate (9) and detects the position of the rotor; and a pressing force applying section that applies a pressing force that presses the holder (7) toward the substrate (9), wherein a convex section (7e) is formed on one of the stator (3) and the holder (7), a concave section (3e) is formed on the other of the stator (3) and the holder (7), and the convex section (7e) is pressed into the concave section (3 e).

Description

Motor and ventilation fan

Technical field

The present invention relates to possess the motor and ventilation fan of stator and rotor.

Background technology

Since in the past, the inner side configuration rotor in stator and making has been used to be linked to the electronic of the axle rotation of rotor always Machine.A kind of motor is patent document 1 discloses that, the motor possesses：Bearing, the bearing can rotatably keep axle；Support, The support keeps bearing；And substrate, the substrate is arranged on the opposition side of bearing across support.

Citation

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2012-253845 publications

The content of the invention

The invention problem to be solved

In the motor disclosed in patent document 1, exist in order to give bearing load and between bearing and support The situation of insertion spring.Spring edge makes bearing direction detached with support give power.The spring is given support relative to support To the throw-on pressure that substrate-side is pressed against.Here, being equipped with the pin extended towards substrate-side on stator, the pin runs through support, and It is engaged with substrate.Due to there is support between substrate and stator, therefore support can be inclined because of the throw-on pressure of spring imparting Move, so the position that there is substrate also produces the situation of skew.In the assembling procedure of motor, if offseting in the position of substrate In the state of carry out with pin engagement, then after assembling motor, have that stress puts on bonding part and joint reliability drops Low situation.

The present invention be in view of above-mentioned problem and complete, it is intended that obtaining to resist support to substrate side pressure The throw-on pressure for leaning on is suppressing the motor of the skew of the position of substrate.

Means for solving the problems

In order to solve above-mentioned problem and reached purpose, the present invention provides a kind of motor, and the motor possesses：Stator, The stator is cylindrical in shape shape；Stator is housed in inside by framework, the framework；Rotor, the rotor is configured in the inner side of stator； Axle, the axle is linked to rotor and the central shaft along stator extends；1st bearing, the 1st bearing is arranged on edge relative to rotor The side of central shaft, and axle is remained and can be rotated centered on central shaft；Support, the support is across the 1st bearing ground quilt The opposition side of rotor is located at, and keeps the 1st bearing；Substrate, the substrate is arranged on the opposition side of the 1st bearing across support；Position Test section is put, the position detection part is loaded on substrate, and detect the position of rotor；And throw-on pressure assigning unit, the pressing Power assigning unit gives throw-on pressure from support to substrate-side that be pressed against, it is characterised in that in stator and support one it is square into There is convex portion, the opposing party in stator and support is formed with recess, convex portion is pressed into recess.

Invention effect

The motor of the present invention is played can be resisted the throw-on pressure that support is pressed against to substrate-side to suppress the position of substrate Skew effect.

Description of the drawings

Fig. 1 is the side view of the DC brushless motors of embodiments of the present invention 1.

Fig. 2 is the enlarged partial sectional view after the part A shown in Fig. 1 is amplified.

Fig. 3 is the top view of stator.

Fig. 4 is the sectional view along the line B-B observation shown in Fig. 3.

Fig. 5 is to observe the figure of support from rack shell side.

Fig. 6 is the figure that support is observed along the arrow C shown in Fig. 5.

Fig. 7 is the sectional view of the ventilation fan of embodiments of the present invention 2.

Specific embodiment

Hereinafter, the motor and ventilation fan of embodiments of the present invention are explained based on accompanying drawing.Additionally, of the invention Do not limited by the embodiment.

Embodiment 1

Fig. 1 is the side view of the DC brushless motors of embodiments of the present invention 1.Fig. 2 is to amplify the part A shown in Fig. 1 Enlarged partial sectional view afterwards.Fig. 3 is the top view of stator.Fig. 4 is the sectional view along the line B-B observation shown in Fig. 3.In figure In 1, will be indicated as sectional view compared to the side that keeps left of central shaft 30.In addition, in FIG, in order that the understanding of accompanying drawing is held Easily, hatching is eliminated.

In motor is DC brushless motors 1, in the inside of the exterior contour being made up of framework 2 and lid 8 each unit is accommodated with Part.Framework 2 is in drum with the end, is metal system.There is the stator 3 for being cylindrical in shape shape in the internal diameter press-in of framework 2.Stator 3 Wound around coil 3b on iron core 3a and constitute.

In the rotor 6b of the inner side configuration in toroidal of stator 3.Link the central shaft 30 along stator 3 on rotor 6b The axle 6a of extension.The outside of the lateral framework 2 in one end of axle 6a projects.In the following description, will be protruding to the outside from framework 2 One side of axle 6a is referred to as front side, is that another side is referred to as rear side by opposition side.

It is being front side bearing 4a compared to the 2nd bearing is arranged with the forward side of the linking portion of rotor 6b, in phase on axle 6a Than in the linking portion with rotor 6b, rearward side arranges the 1st bearing i.e. rear side bearing 4b.Axle 6a is remained energy by each bearing 4a, 4b It is enough to be rotated centered on central shaft 30.The shell 2a that front side bearing 4a is formed in framework 2 keeps.

The support of bearing 4b on rear side of keeping is set on the position of the opposition side for becoming rotor 6b across rear side bearing 4b 7.Support 7 uses resinous support.The rack shell 7d of bearing 4b on rear side of keeping is formed with support 7.Support 7 with it is rear Throw-on pressure assigning unit i.e. spring 5 is provided between side bearing 4b.Spring 5 makes rear side bearing 4b and support 7 along 30 points of central shaft From direction on act on power.Using spring 5, can be by order that the power required for rear side bearing 4b suitably works be applied to On rear side bearing 4b.In addition, using spring 5, giving the throw-on pressure that support 7 leans on support 7 to the side pressure of substrate 9.

Fig. 5 is to observe the figure of support 7 from rack shell 7d sides.Fig. 6 is along the arrow C observation supports 7 shown in Fig. 5 Figure.Support 7 is in circular plate shape as entirety, to close the open portion of framework 2.The outer peripheral portion of support 7 is bracket flange 7c, And be sandwiched into as shown in Figure 2 between the framework flange 2b of framework 2 and the lid flange 8a of lid 8.

As shown in Fig. 2 and Fig. 5, brace projections 7a of the side of oriented framework 2 protrusion are formed on support 7 and to the pleurapophysis of lid 8 The lid lateral process 7b for going out.Brace projections 7a along framework 2 inner circumferential be inserted into the inner side of framework 2.Lid lateral process 7b along The inner circumferential of lid 8 it is inserted into the inner side of lid 8.By brace projections 7a to be inserted into the inner side of framework 2 and by lid lateral process 7b The inner side of lid 8 is inserted into, the center of shell 2a and the center pairing of rack shell 7d is made.Framework flange 2b, bracket flange 7c and lid flange 8a are latchingly fixed by screw thread.

Substrate 9 is provided with the opposition side of the rear side bearing 4b across support 7.It is provided with detection rotor 6b's on substrate 9 The position detection part of position is Hall IC 31, the drive circuit for rotating rotor 6b, power circuit and constitutes micro electric The electronic component of sub- computer.Additionally, eliminating the diagram of drive circuit and electronic component.

Formed on bracket flange 7c, framework flange 2b, lid flange 8a for the screw thread of DC brushless motors 1 latchingly to be fixed Hole on product.For of the product of fixed DC brushless motors 1, ventilation fan can be enumerated.

As shown in Figure 3 and 4, stator 3 be by with the insulation of coil 3b for the purpose of by by the insulator 3d of resin forming On iron core 3a after convolute coil 3b and constitute.The pin 3c projected towards substrate 9 is formed with stator 3.Coil 3b End face electrically engage with pin 3c.Pin 3c runs through support 7, and to reaching substrate 9, and engage with substrate 9.For substrate 9 and pin 3c Engagement for, can enumerate using the engagement of soldering as one.

Commercial ac power source is accessed externally to substrate 9, and AC power is converted into DC voltage using power circuit, With the supply that the voltage corresponding to each element carries out power supply.The drive circuit for being loaded into substrate 9 produces alternating voltage, so that electric Stream flows relative to coil 3b through pin 3c along the direction of regulation.Axle 6a is rotated using the electric current flowed in coil 3b.

The sense of DC brushless motors 1 is detected based on the signal that microcomputer is Hall IC 31 by position detection part Answer voltage-phase and be controlled, so that induced voltage phase place becomes identical with the motor phase current phase place produced from drive circuit Phase place.Become same phase by making induced voltage phase place and motor phase current phase place, the efficiency of DC brushless motors 1 can be sought Change.

As shown in Fig. 2, Fig. 3 and Fig. 4, on the iron core 3a of stator 3 recess 3e is formed with.Such as Fig. 2, Fig. 5 and Fig. 6 institute Show, the convex portion 7e of the side of oriented stator 3 protrusion is formed in brace projections 7a of support 7.Recess 3e and convex portion 7e is along center Axle 30 is formed on the position for overlapping in the case of observing.In addition, when DC brushless motors 1 are assembled, convex portion 7e is pressed into To in recess 3e.The throw-on pressure that the press-in strength ratio for being pressed into convex portion 7e to recess 3e is given by spring 5 is big.As shown in fig. 6, convex The front end of portion 7e is provided with tapering.Thereby, it is possible to seek the raising of the insertion that convex portion 7e is inserted to recess 3e.

DC brushless motors 1 from the description above, stator 3 can be carried out using the chimeric of recess 3e and convex portion 7e and are propped up The mutual positioning of frame 7.Further, since convex portion 7e is pressed into recess 3e, it is possible to suppressing support 7 because being assigned by spring 5 The throw-on pressure for giving offsets to the side of substrate 9 and produces and depart from or loosen.Therefore, it is possible to suppress substrate 9 to be moved by support 7.That is, can Substrate 9 is suppressed to offset because of the throw-on pressure given by spring 5.

Therefore, it is possible to make substrate 9 engage with pin 3c in position.If here, substrate 9 in the state of skew with pin 3c is engaged, then in assembling procedure behind, in the case where substrate 9 is returned to appropriate position, there is stress and put on base The bonding part of plate 9 and pin 3c and situation that joint reliability is reduced.On the other hand, because the DC in present embodiment 1 is brushless The skew of substrate 9 can be suppressed in motor 1, it is possible to seeking the raising of pin 3c and the joint reliability of substrate 9.Thus, energy Enough seek the raising of the reliability of DC brushless motors 1.In addition it is also possible to form recess in the side of support 7 and form convex in the side of stator 3 Portion.

Further, since support 7 is resin-made and has insulating properties, thus be easy to guarantee coil 3b, pin 3c and substrate 9 and The creep age distance radially of framework 2 and lid 8.In addition, with regard to along the direction of central shaft 30, coil 3b and support can be made 7 contacts, it is also possible to make support 7 contact with substrate 9.Therefore, by seeking the distance and substrate 9 of coil 3b and support 7 and propping up The shortening of the distance of frame 7 such that it is able to seek the miniaturization of DC brushless motors 1.Additionally, support 7 is not limited to resin-made.Support 7 can also be metal system.

Alternatively, it is also possible to insert spring between front side bearing 4a and framework 2, the spring bearing 4a and framework on front side of making 2 detached direction applying powers.Using the spring, the throw-on pressure for leaning on support 7 to the side pressure of substrate 9 can be also given.Spring is being inserted In the case of entering to front side bearing 4a sides and both rear side bearing 4b sides, it is preferably set to：With by be inserted into front side bearing The throw-on pressure that the spring of 4a sides gives with the spring 5 for being inserted into rear side bearing 4b sides is compared, to the convex portion 7e of recess 3e press-ins Press-in intensity it is big.

Embodiment 2

Fig. 7 is the sectional view of the ventilation fan of embodiments of the present invention 2.In the figure 7, in order that the understanding of accompanying drawing is easy, Eliminate the hatching of a part.Ventilation fan 11 is that the DC brushless motors 1 that will be illustrated in above-mentioned embodiment 1 are arranged on main body Constitute on 12.Blade 13 is fixedly arranged at the front end with the axle 6a of DC brushless motors 1.

Ventilation fan 11 is main body 12 to be arranged at into ceiling 14 and fan is covered into 15 installations construction on the main body 12.By DC The axle 6a rotations of brushless motor 1, blade 13 also rotates, so as to produce the flowing of the air shown in the arrow D of Fig. 7.

It is as illustrated in fig. 1 such, for DC brushless motors 1, the circuit portion of substrate 9 is set and rotor 6b is set And the motor part of stator 3 is separated by support 7.Therefore, although motor part is exposed in the flowing of air, but circuit portion into It is the space with the flowing cut-off of air, so being difficult to become high humility space.Therefore, possesses the ventilation fan of DC brushless motors 1 11 ventilations that can be used in high humidity environment.For high humidity environment, bathroom can be enumerated as one.In addition, sharp With the miniaturization of DC brushless motors 1, the miniaturization of ventilation fan 11 can be sought.Thereby, it is possible to obtain being easy in limited space The ventilation fan 11 arranged in ceiling.

Composition shown in embodiment above represents of present disclosure, additionally it is possible to other known technologies Combination, and without departing from the spirit and scope of the invention, it is also possible to omit, change the part for constituting.

Description of reference numerals

Before 1DC brushless motors (motor), 2 frameworks, 2a shells, 3 stators, 3a iron cores, 3b coils, 3c pins, 3e recesses, 4a Side bearing (the 2nd bearing), 4b rear sides bearing (the 1st bearing), 5 springs (throw-on pressure assigning unit), 6a axles, 6b rotors, 7 supports, 7e Convex portion, 9 substrates, 11 ventilation fans, 12 main bodys, 13 blades, 30 central shafts, 31 Hall ICs (position detection part).

Claims

1. a kind of motor, the motor possesses：

Stator, the stator is cylindrical in shape shape；

The stator is housed in inside by framework, the framework；

Rotor, the rotor is configured in the inner side of the stator；

Axle, the axle is linked to the rotor and the central shaft along the stator extends；

1st bearing, the 1st bearing is arranged on the side along the central shaft relative to the rotor, and the axle is protected Hold to be rotated centered on the central shaft；

Support, the support is arranged on the opposition side of the rotor across the 1st bearing, and keeps the 1st bearing；

Substrate, the substrate is arranged on the opposition side of the 1st bearing across the support；

Position detection part, the position detection part is loaded on the substrate, and detects the position of the rotor；And

Throw-on pressure assigning unit, the throw-on pressure assigning unit gives the throw-on pressure for being pressed against the support to the substrate-side,

Characterized in that,

A side in the stator and the support is formed with convex portion,

The opposing party in the stator and the support is formed with recess,

The convex portion is pressed into the recess.

2. motor according to claim 1, it is characterised in that

The throw-on pressure assigning unit is spring, and the spring is arranged between the 1st bearing and the support, makes described 1 bearing and the support act on power along on the detached direction of the central shaft.

3. motor according to claim 1, it is characterised in that

The motor is also equipped with the 2nd bearing, and the 2nd bearing is arranged on along the another of the central shaft relative to the rotor Side, and the axle is remained and can be rotated centered on the central shaft,

2nd bearing is maintained in the framework,

The throw-on pressure assigning unit is spring, and the spring is arranged between the 2nd bearing and the framework, makes described 2 bearings and the framework act on power along on the detached direction of the central shaft.

4. the motor according to any one of claims 1 to 3, it is characterised in that

The support is resin-made.

5. a kind of ventilation fan, it is characterised in that

The ventilation fan possesses：

Motor, the motor is the motor any one of Claims 1 to 4；

Blade, the blade is linked to the axle；And

The blade is housed in inside by main body, the main body.