CN100456600C

CN100456600C - Rotor and method for mfg of resin magneto

Info

Publication number: CN100456600C
Application number: CNB031535925A
Authority: CN
Inventors: 石原弘之; 日野阳至; 內藤真也; 室田圭子; 寺田润史; 小野朋宽
Original assignee: Yamaha Motor Co Ltd
Current assignee: Yamaha Motor Co Ltd
Priority date: 2002-08-16
Filing date: 2003-08-18
Publication date: 2009-01-28
Anticipated expiration: 2023-08-18
Also published as: JP2004080898A; TW200406972A; TWI228341B; CN101521412A; CN101521412B; CN1484356A

Abstract

The present invention provides a rotor wherein adhesive placed in the gap between the bonding face of a magnet and the bonding face of a yoke can be easily made to stick out. The rotor comprises magnets 45 placed opposite to a stator; and a rotor-side yoke 42 including bonding faces 71, to which the bonded faces 72 of the magnets 45 are bonded and secured via a bonding member 70. The rotor-side yoke 42 is formed, with the gaps between the bonded faces 72 and the bonding faces 71 where the bonding member 70 is placed being tapered as going toward the one-side ends 71a of the bonding faces 71.

Description

Rotor

Technical field

The present invention relates to a kind of rotor that is used for the electric rotating machine of axial-gap and radial gap type etc.

Background technology

In the last few years, as the electric rotating machine of the drive source that is used for electric bicycle or other general electro-motor, above-mentioned axial-gap also had the radial gap type electric rotating machine to obtain people's attention.

For example axial-gap electro-motor as axial-gap rotary electric machine, it is configured to: the discoideus rotor-side yoke of the rotation axis that is supported by its bearing with for example be laminated into the mutual subtend of stator side yoke of lamina along central axis direction as discoideus steel plate, and its plane and rotation axis intersect vertically in opposite directions.

And, the configuration shape for example is the excitatory with magnet (magnet) of circular (or annular) on the forward surface of rotor-side yoke, radiate direction (circumferencial direction) in the forward surface upper edge of stator side with respect to rotation axis and dispose several teeth, mutual subtend face and the rotation axis of magnet and teeth intersects vertically, and the gap between its forward surface forms vertical with rotation axis plane.

In the axial gap-type electric motor that constitutes like this, the magnet of rotor, by attraction with respect to stator (several teeth), generally from the rotor-side yoke towards being peeled off bearing load on the direction of getting off.Therefore, implement effectively to reinforce with respect to the necessity that is bonded with of the magnet of rotor-side yoke.

Therefore, as shown in figure 19, answer overbrushing to smear some bonding agents 151 to the bonding plane of yoke 150, as by the magnet of convered structure (magnet) 152 by bonding plane on place bonding agent 151, be suitable size from being pressed onto with the power F of regulation above the bonding plane of this magnet in opposite directions, because yoke bonding plane and magnet are overflowed from its gap by the bonding agent in the gap of bonding plane, carry out practical bonding.

On the other hand, as the magnet that uses in the above-mentioned axial-gap electro-motor, used the resin magnet (bond hybrid magnet) of shock resistance, processing characteristics excellence recently.This resin magnet is that the resin (mixture) that magnet powder and binder resin mix (compound) is utilized injection moulding and is shaped resulting.

For example, Figure 20 is the figure of an example of demonstration injection molding device for molding 160.

As shown in figure 20, by injection molding device for molding 160, to transport by down gate 162 from magnet powder and the binder resin mixture (resin) that injection device 161 penetrates, in annular mould cavity 164, inject filling by cast gate 165 (inlet in mould cavity 164) by runner gate 163.Afterwards, after cooling curing is finished,, open mould 166, will generate circular resin magnet down gate and runner gate excision.

With under the resin magnet of this injection moulding and the situation that for example rare earth magnet is compared, rare earth magnet is easy to generate rust, when producing rust, might take place that magnetic reduces and the output of motor reduces.

To this, when generating by injection moulding under the situation of resin magnet, when the melting resin when injection moulding (mixture) flows in mould 166, the part that contacts with the mold wall of low temperature (surface of shaping thing) is called as epidermal area, because the temperature of resin reduces and has formed hardened layer, so the generation that can suppress to become rusty.

But, bonding for above-mentioned yoke and magnet implemented relatively firmly practical bondingly for bonding agent is overflowed, must carry out compression process to magnet with powerful load, or the compression process of long period, cause the energy increase necessary in the rotor manufacturing and the prolongation of manufacturing time etc. like this.

In addition, the compression process of magnet being carried out compression process or long period with powerful load may produce the distortion of the fracture defective of magnet or yoke and produce shortcomings such as residual stress to bond layer.

Especially, state in the use under the situation of resin magnet, shrink because of being shaped, as shown in figure 21, resin magnet 170 in the middle of magnet 170, formed concavity by bonding plane central portion 171 from its bonding plane, so, compare with the situation on the plane that does not have concavity, for bonding agent is overflowed, need bigger load, need too much energy during manufacturing.In addition, air etc. are easy to stay in the above-mentioned concavity part 171, can cause that also the joint by the bonding plane of bonding plane and yoke 172 of magnet 170 is bad.

Like this, magnet of the prior art (resin magnet) and yoke bonding, except having increased the manufacturing energy and having prolonged the manufacturing time, also since the increase and the reduction in product (having used the electric rotating machine of rotor) life-span of the delay of the above-mentioned air fraction defective when causing rotor to make have much room for improvement.

In addition, with under the situation of ejection forming method generation resin magnet (with reference to Figure 22 (a)), as shown in Figure 22 (b), on the resin magnet (formed products) 180 that generates, generated epidermal area 181.

At this moment, in order to take out formed products 180, when from formed products 180 excision down gates 162 and runner gate 163, shown in Figure 22 (b), owing to do not generate epidermal area 181 on its gate part (down gate cut-out) 165, magnetic splits away off on the gate part 165 of formed products 180.So, for formed products 180, produce rust in order to prevent above-mentioned gate part 165, be necessary once more formed products 180 to be implemented antirust processing.

In addition, as mentioned above, as the problem points of formed products 180 (resin magnet), when bonding to formed products 180 on the yoke with the epidermal area 181 that produces by injection moulding, because the part of epidermal area 181 becomes by bonding, can produce the new problem that adhesive strength reduces.

So,, need carry out upgrading processing (grinding process etc.) to being appended of formed products 180 that generates by bonding plane (epidermal area) in order to improve adhesive strength.

The present invention in view of the above, the 1st purpose is: a kind of rotor is provided, do not need to implement magnet to be carried out the compression process of compression process or long period, the bonding agent between the bonding plane gap of the bonding plane of magnet and yoke is easily overflowed with powerful load.

In addition, the present invention in view of the above, the 2nd purpose is: a kind of rotor is provided, even under the situation of the resin magnet that has used the gate part with no epidermal area, does not need to carry out the processing of appending of antirust processing etc., and can avoid gate part to produce rust.

In addition, the present invention in view of the above, the 3rd purpose is: a kind of rotor is provided, even under the situation of having used the resin magnet that is generated by injection moulding, does not need processing of carrying out the surface modification quality etc., also can obtain high-adhesive-strength.

Summary of the invention

Rotor according to the invention of technical scheme 1 record that is used for reaching above-mentioned purpose, this rotor is equipped with: the yoke of the 2nd bonding plane that magnet that disposes in opposite directions with stator and the 1st bonding plane that includes above-mentioned magnet are adhesively fixed by adhesives, with at least one side in above-mentioned magnet and the yoke, at least one side of the gap that is configured as the adhesives between above-mentioned the 1st bonding plane and the 2nd bonding plane in the 1st and the 2nd bonding plane end side or central portion side become tapered shape.

In the invention of technical scheme 2 records, dock with the 1st bonding plane of above-mentioned magnet the end that above-mentioned yoke is formed one side of its 2nd bonding plane, and the shape of the 1st bonding plane is left in the end of the other parts of the 2nd bonding plane.

In the invention of technical scheme 3 records, the central portion that above-mentioned yoke is formed its 2nd bonding plane contacts with the 1st bonding plane of above-mentioned magnet, and the shape of the 1st bonding plane is left in the end of the other parts of the 2nd bonding plane.

In the invention of technical scheme 4 record, above-mentioned magnet is formed the shape that the central portion of its 1st bonding plane contacts with the 2nd bonding plane of above-mentioned yoke.

And, the rotor of invention for record in the technical scheme 5 of reaching above-mentioned purpose is equipped with: have comprise gate part by the resin magnet of bonding plane, above-mentioned be applied on by bonding plane with surrounding above-mentioned gate part at least this by the adhesives on the bonding plane, by above-mentioned adhesives with respect to the above-mentioned yoke that above-mentioned gate part is bonded together with airtight conditions by bonding plane.

The invention of record in the technical scheme 6, above-mentioned adhesives is applied in whole above-mentioned gate part.

The invention of record in the technical scheme 7, above-mentioned adhesives is applied in and comprises the whole above-mentioned by on the bonding plane of above-mentioned gate part.

In addition, rotor for the invention of record in the technical scheme 8 of reaching above-mentioned purpose, be equipped with: resin magnet and yoke, wherein, resin magnet has conduct by the male and fomale(M﹠F) corresponding to above-mentioned cavity face of bonding plane, this male and fomale(M﹠F) is processed by the forming process that use has the mould of concavo-convex cavity face, yoke by adhesives be adhered to above-mentioned resin magnet by on the bonding plane.

And, according to rotor for the invention of record in the technical scheme 9 of reaching above-mentioned purpose, preparation has the mould that is processed into concavo-convex cavity face, the cavity face of this mould corresponding to the shape of above-mentioned resin magnet and corresponding to this resin magnet by bonding plane, above-mentioned resin material injected and be filled into this mould, the resin material of this filling is solidified, pressure when being solidified by above-mentioned resin material keeps making between above-mentioned resin material and above-mentioned mould producing shear fracture, and the above-mentioned corresponding surface by bonding plane of the resin material in the above-mentioned mould is implemented concavo-convex processing.

Description of drawings

Fig. 1 is the end view as the electric bicycle of an example of device of the axial-gap rotary electric machine that has carried the rotor that includes the 1st execution mode of the present invention.

Fig. 2 be for II-II among in-built Fig. 1 of rearward end of the postbrachium that shows in the key diagram 1 to looking sectional view (a part of side view).

Fig. 3 has shown the plane graph of watching the state under the situation of rotor of the 1st execution mode of the present invention from stator shown in Figure 2 side.

Fig. 4 is that the IV-IV of rotor shown in Fig. 3 is to looking sectional view.

Fig. 5 is the sectional view of demonstration corresponding to the rotor of the 1st variation of the 1st execution mode of Fig. 4.

Fig. 6 is the sectional view of demonstration corresponding to the rotor of the 2nd variation of the 1st execution mode of Fig. 4.

Fig. 7 is the sectional view of demonstration corresponding to the rotor of the 3rd variation of the 1st execution mode of Fig. 4.

Fig. 8 shows the resin magnet of rotor of the present invention's the 2nd execution mode and the exploded perspective view of rotor-side yoke general configuration respectively.

Fig. 9 shows the resin magnet of rotor of the 1st variation of the 2nd execution mode and the exploded perspective view of rotor-side yoke general configuration respectively.

Figure 10 shows the resin magnet of the 2nd variation rotor of the 2nd execution mode and the exploded perspective view of rotor-side yoke general configuration respectively.

Figure 11 shows the resin magnet of the 3rd variation rotor of the 2nd execution mode and the exploded perspective view of rotor-side yoke general configuration respectively.

Figure 12 shows the resin magnet of the 4th variation rotor of the 2nd execution mode and the exploded perspective view of rotor-side yoke general configuration respectively.

Figure 13 A is that the resin magnet with the rotor of making the present invention's the 3rd execution mode is the injection molding device for molding figure of purpose.

Figure 13 B is a kind of distortion of Figure 13 A.

Figure 14 is the resin magnet figure that is generated by injection molding device for molding shown in Figure 13 A.

Figure 15 is the figure that is used to illustrate the generative process of epidermal area when being shaped.

Figure 16 is the figure that is used to illustrate shear fracture when being shaped.

Figure 17 shows the figure that produces shear fracture in the resin magnet manufacture process of the present invention's the 3rd execution mode.

Figure 18 is in the resin magnet manufacture process of the present invention's the 3rd execution mode, the figure of epidermal area collapse state.

Figure 19 is the figure of magnet of the prior art and the mutual adhering state of yoke.

Figure 20 is the figure that shows an example of injection molding device for molding.

Figure 21 is the figure of resin magnet of the prior art and the mutual adhering state of yoke.

Figure 22 (a) shows behind the injection moulding to excise the figure of the state that gets off from injection molding device for molding as the resin magnet of molded component that Figure 22 (b) is the expanded view of the gate portions (the A part shown in the broken circle) of the molded component shown in Figure 22 (a).

Embodiment

Execution mode to rotor of the present invention describes with reference to accompanying drawing.

(the 1st execution mode)

Fig. 1 is the end view of lift-launch as the electric bicycle 1 of the axial-gap rotary electric machine of an example of the electric rotating machine that has used the rotor relevant with the 1st execution mode of the present invention.

As shown in Figure 1, electric bicycle 1 is equipped with vertical tube of front fork 2 at the front upper part of its car body, changes the slotting freely to rotate inside that leads in this vertical tube of front fork of not shown steering spindle that the car body direction is used.Be installed with in the upper end of this steering spindle be used for fixing turn to handgrip 3a turn to handgrip support unit 3, turn to the two ends of handgrip 3a that operating handle 4 is installed at this.In addition, the operating handle 6 on not shown right side (inboard of Fig. 1) constitutes rotating throttle grip.

And, the front fork 5 of pair of right and left is installed from the lower ends downward side of vertical tube of front fork 2.Lower end at each front fork 5 is equipped with front-wheel 6 by front axle 7, and front-wheel 6 is propped up by front axle 7 free rotation ground supporting pivots by the state of front fork 5 with sprung suspension.Turn to the place ahead that turns to handgrip 3a on the handgrip support unit 3 to dispose instrument 8, fixing headlamp 9 below the instrument 8 that turns to handgrip support unit 3, the both sides of this headlamp 9 are provided with turn signal lamp 10 (only having shown a side among Fig. 1).

The vehicle frame 11 of seeing the pair of right and left that roughly is the L font from vertical tube of front fork 2 sides is provided with to the extension of the rear of car body.This vehicle frame 11 is cylindrical, and after extending downwards obliquely in the car body rear, rearward level extends, and sees from the side roughly to be the L font from vertical tube of front fork 2.

In the rear side end of this a pair of vehicle frame 11, from upwards the extending seat rail of pair of right and left of its rear side end tilted rearward, the rear side end 12a of this seat rail 12 along the shape of vehicle seat 13 backward the side bending.

And, in the middle of the seat rail 12 of this pair of right and left, freely configuration of storage battery 14 with dismantling, chargeable several 2 primary cells are equipped with in these storage battery 14 inside.

Near the sweep of the seat rail 12 of pair of right and left, the vehicle seat stay 15 that is the word of falling U shape welds fixing obliquely to the place ahead of car body oblique upper, in the part that this vehicle seat stay 15 and left and right sides seat rail 12 are surrounded, the leading section at seat 15 can dispose up and down rotationally.

The rearward end of seat rail 12 has been installed rear mudguard 16, in the back of this rear mudguard 16 taillight 17 is installed.In addition, turn signal lamp 18 (only having shown a side among Fig. 1) is set in the left and right sides of taillight 17.

On the other hand, weld respectively on the horizontal part below the seat 13 of pair of right and left vehicle frame 11 and fixing postbrachium carriage 19 (only having shown a side among Fig. 1), on the postbrachium carriage 19 of pair of right and left, the front end of postbrachium 20 by pivot 21 free swaying ground supportings.And on the rearward end 20a of this postbrachium 20, pivot is propping up the trailing wheel 22 as driving wheel freely to rotate, and this postbrachium 20 and trailing wheel 22 by posterior bumper 23 sprung suspension.

Below the horizontal part of the vehicle frame 11 of pair of right and left, disposing the pedal 24 (only having shown a side among Fig. 1) of pair of right and left respectively, and at the rear side of pedal 24, side parking leg 25 is loaded to closing a side by back-moving spring 27.

Then, in the inside of the rearward end 20a of postbrachium 20, installed to have and be connected in the driver element 29 that trailing wheel 22 and revolution drive the axial-gap electro-motor 28 (below, be designated as electro-motor 28 sometimes simply) of its trailing wheel 22.

Fig. 2 is used among in-built Fig. 1 of rearward end 20a of the postbrachium 20 that key diagram 1 shows II-II to looking sectional view (a part of side view).And, do not show trailing wheel 22.

As shown in Figure 2, on the side, right side of the rearward end 20a of postbrachium 20, the gear cover 35 that is being installed in the space that portion forms, has been assembled into electro-motor 28, planetary reducer 36 and the controller 37 etc. that constitute driver element 29 and has become one within it.

As shown in Figure 2, axial-gap electro-motor 28, be equipped with rotor (rotor) 40 and stator (stator) 41, wherein, the rearward end 20a of rotor (rotor) 40 relative postbrachiums 20 is by bearing 38a and 38b, center line BO with this

bearing

38a and 38b is the center rotatably support, stator (stator) 41 and this rotor 40 are fixed in the inner face of postbrachium rearward end 20a in opposite directions, roughly are circular (fried donut-like).

As shown in Fig. 2 and Fig. 3, rotor 40 has rotor-side yoke 42, and this rotor-side yoke 42 forms to the protruding roughly screw die shape of the rearward end 20a of postbrachium 20.

That is, rotor-side yoke 42 has: with the stator 41 circular 42a of annulus portion in opposite directions, roughly be the conus portion 42b that coniform (roughly circular cone shape) extends from the inner rim portion of the 42a of this annulus portion to the rearward end 20a of postbrachium 20, from the postbrachium rearward end 20a side periphery portion of this conus portion 42b backward end 20a be the 1st cylindrical portion 42c that convex is extended along central axis BO, the 42d of annulus portion that extends to direction radially to its inboard from the postbrachium rearward end 20a side periphery portion of this cylindrical portion 42c, and from the inner rim portion of the 42d of this annulus portion backward end 20a be the 2nd cylindrical portion 42e that convex extends along central axis BO and form.

And the 2nd cylindrical portion 42e is that the center rotatably support by bearing 38a and 38b with central axis BO, has constituted the rotation axis of rotor 40.So the rotation axis center of the rotation axis 42e of rotor 40 is corresponding with the central axis BO of bearing 38a, 38b.

In addition, rotor 40 is equipped with excitatory with magnet (magnet) 45, this magnet (magnet) 45 is relative with stator side forward surface on the 42a of annulus portion of rotor-side yoke 42, is adhesively fixed by the adhering part 70 that the following describes, and has the toroidal coaxial with central axis BO.

This magnet 45 is resin magnet (a bond hybrid magnet), be that the resin (mixture) after magnet powder and the tackifying resin mixing (compound) is formed circular obtaining by injection moulding, have the N utmost point and the S utmost point that are disposing along its circumferential direction with intermeshing.

Rear wheel-side end on the rotation axis 42e of rotor 40, (rotation axis 42e) fixedly installs rotation axis 46 with coaxial state with this rotor 40, and this rotation axis 46 can rotate with rotor 40.

On the other hand, planetary reducer 36 is connected with rotation axis 46, is assembled in the conus portion 42b of rotor-side yoke 42.This planetary reducer 36 and electro-motor 28 partly are piled up at the Width of car.

Planetary reducer 36 is connected in the back axle 47 with rotation axis 46 coaxial states configurations, has the function that rotation (rotation of rotation axis 46) to electro-motor 28 is slowed down and is delivered to back axle 47.Nut 50 is screwedly mounted on from the outstanding leading section 47a of the gear cover 35 of back axle 47 with freely dismantling, and trailing wheel 22 is installed and fixed by nut 50 with the state that is entrenched on the back axle.

And, as shown in Figure 2, stator 41 is fixedly installed on the rearward end 20a of postbrachium 20, be equipped with: the stator side yoke (stator yoke) 60 of the laminate structure that discoideus or circular steel plate (in the present embodiment for circular steel plate) forms along the central axis direction lamination, leave that certain interval is placed in opposite directions and each all is several teeth 61 that the laminate by steel plate forms with relative with magnet 45.

Here, Fig. 4 is that the IV-IV of rotor-side yoke 42 shown in Fig. 2 and Fig. 3 is to looking sectional view.

As shown in Figure 4, the 42a of annulus portion of rotor-side yoke 42 has with magnet 45 and is bonded in the magnet forward surface 71 as bonding plane on this magnet 45 in opposite directions and by adhering part (bonding agent) 70, in addition, magnet 45 have with magnet forward surface 71 in opposite directions, and by adhering part 70 be adhered on the magnet forward surface 71 by bonding plane 72.

At this moment, the one end 71a of the perimeter sides of the 42a of annulus portion on magnet forward surface 71 of rotor-side yoke 42 and being contacted of magnet 45 by bonding

plane

72,71a other end 71b in opposite directions is the shape of leaving by bonding plane 72 with this end, so, be clipped in magnet forward surface 71 and be coniform towards an end 71a of magnet forward surface 71 with by the coupling part of bonding plane 72 by the gap at 70 places of the adhering part between the bonding plane 72.

Promptly, according to this structure, owing to be clipped in magnet forward surface 71 and be coniform by the slit at adhering part 70 places between the bonding plane 72, so, as shown in figure 21, the situation parallel with two contact-making surfaces compared, even load in little load under the situation of short period, the bonding agent 70 in mediate crack is overflowed from its gap, thus from the other end 71b side of above-mentioned magnet forward surface 71 to the inner peripheral surface of magnet 45.

Therefore, the magnet forward surface 71 by bonding plane 72 and rotor-side yoke 42 of magnet 45 can be bonded together conscientiously and securely.

And, because an end 71a of perimeter sides and being contacted of magnet of magnet forward surface 71 by bonding plane 72, can be easily with the initial tie point of the 42a of annulus portion size separately of magnet 45 and rotor-side yoke 42 as benchmark, improved the dimensional accuracy of rotor 40.

In addition, because an end 71a of perimeter sides and being connected by bonding plane 72 of magnet 45 of magnet forward surface 71 as benchmark, can the most suitably guarantee this tie point between magnet forward surface 71 with by the thickness of the adhering part layer between the bonding plane 72.

Fig. 5 is the corresponding sectional view of Fig. 4 with the rotor 40A of the 1st variation of present embodiment.

Promptly, in this variation, as shown in Figure 5, the 42a of annulus portion of rotor-side yoke 42 is shaped as: an end 71a of the perimeter sides of magnet forward surface 71 leave magnet 45 by bonding plane 72, with this end 71a other end 71b in opposite directions with contacted by bonding plane 72, as a result, be clipped in magnet forward surface 71 and be coniform towards the other end 71b of magnet forward surface 71 with by the contact portion of bonding plane 72 by the gap of the adhering part between the bonding plane 72 70.

According to this structure, owing to be clipped in magnet forward surface 71 and be coniform by the gap at 70 places of the adhering part between the bonding plane 72, the situation parallel with two bonding planes (with reference to Figure 21) compared, even load in little load under the situation of short period, the adhering part 70 in mediate crack is overflowed from its gap, thus from an end 71a side of above-mentioned magnet forward surface 71 to the inner peripheral surface of magnet 45.

So, can improve above-mentioned magnet 45 by the cementability of the magnet forward surface 71 of bonding plane 72 and rotor-side yoke 42, the 42a of annulus portion that improves magnet 45 and rotor-side yoke 42 separately dimensional accuracy and optimization between magnet forward surface 71 with by the thickness of the adhering part layer between the bonding plane 72.

Fig. 6 is the corresponding sectional view of Fig. 4 with the rotor 40B of the 2nd variation of present embodiment.

Promptly, in this variation, as shown in Figure 6, one end 71a of the perimeter sides of the magnet forward surface 71 of the 42a of annulus portion of rotor-side yoke 42 and with this end 71a other end 71b in opposite directions leave respectively magnet 45 by bonding plane 72, the central portion 71c of magnet forward surface 71 is and the shape that is connected by bonding plane 72, the result, be clipped in magnet forward surface 71 and, be coniform towards the central portion 71c of magnet forward surface 71 with by the contact portion of bonding plane 72 by the gap of the adhering part between the bonding plane 72 70.

According to this structure, owing to clip magnet forward surface 71 and be coniform by the gap of the adhering part between the bonding plane 72 70, the situation parallel with two bonding planes (with reference to Figure 21) compared, even load in little load under the situation of short period, the adhering part 70 in mediate crack is overflowed from its gap, thus from the both sides of an end 71a of above-mentioned magnet forward surface 71 and the other end 71b to the inner peripheral surface of magnet 45.

So, can improve above-mentioned magnet 45 by the cementability of the magnet forward surface 71 of bonding plane 72 and rotor-side yoke 42, improve the 42a of the annulus portion dimensional accuracy separately of magnet 45 and rotor-side yoke 42, and optimization is between magnet forward surface 71 with by the thickness of the adhering part layer between the bonding plane 72.

Fig. 7 is the corresponding sectional view of Fig. 4 with the rotor 40C of the 3rd variation of present embodiment.

Promptly, in this variation, as shown in Figure 5, another end 72b by an end 72a of the periphery avris of bonding plane 72 and inner periphery side of magnet 45 leaves the magnet forward surface 71 of cylindrical portion 45a respectively, central portion 72c by bonding plane 72 is the shape that contacts with magnet forward surface 71, as a result, be clipped in magnet forward surface 71 and by the gap of the adhering part between the bonding plane 72 70, towards being coniform by the contact portion of the central portion 72c of bonding plane 72 and magnet forward surface 71.

According to this structure, owing to be clipped in magnet forward surface 71 and be coniform by the gap of the adhering part between the bonding plane 72 70, so the situation parallel with two bonding planes (with reference to Figure 21) compared, even load in little load under the situation of short period, the adhering part 70 in mediate crack is overflowed from its gap, thus from magnet 45 by the interior outer peripheral portion 72a of

bonding plane

72 and 72b side on the inner and outer circumferential surfaces of magnet 45.

In addition, in the present embodiment, though shown an example of the shape of the 42a of annulus portion of rotor 42 and magnet 45 among Fig. 4-Fig. 7, the present invention is not limited only to these, be the shape of circular cone if be clipped in the gap by the adhering part 70 between the magnet forward surface 71 of bonding plane 72 and rotor-side yoke 42 42a of annulus portion of magnet 45 and be by the end side of at least one direction of inboard of bonding plane 72 and magnet forward surface 71 or central portion side, also can take other various shapes towards above-mentioned.

(the 2nd execution mode)

Fig. 8 shows the resin magnet 81 of rotor 80 of the present invention's the 2nd execution mode and the exploded perspective view of rotor-side yoke 82 general configuration respectively.In addition, for Fig. 8, in order to make explanation easily, rotor-side yoke 82 is the general cylindrical shape shape that has with the stator 41 circular 82a of annulus portion in opposite directions.

The resin magnet 81 of the rotor 80 of present embodiment is to utilize injection moulding to obtain the resin (mixture) that magnet powder and tackifying resin mix, as shown in Figure 8, when injection moulding finishes back (behind the cooling curing) when excision down gate and runner gate, the gate part 83 that has the no epidermal area part of generation on by bonding plane 81a.

At this moment, the rotor 80 of present embodiment, as shown in Figure 8, has adhering part 84, this adhering part 84 will be will be formed at the mode that is surrounded respectively by the whole gate parts 83 of bonding plane 81a of magnet 81, be applied in to circular by on the bonding plane 81a, being bonded together by adhering part 84 by bonding plane 81a of the magnet forward surface of the 82a of annulus portion of rotor-side yoke 82 and magnet 81 constitutes rotor 80.

Promptly, in the present embodiment, whole gate parts 83, promptly, since with surround epidermal area peel off the position around mode smeared adhering part 84, if so be bonded together by the magnet forward surface of this adhering part 84 with the 82a of annulus portion of rotor-side yoke 82, gate part 83 is all filled up by rotor-side yoke 82 around it, can make gate part 83 keep airtight conditions with respect to the extraneous air around it.

So, do not need to carry out antirust processing etc., just can suppress the oxidation of the gate part 83 that takes place owing to influence around the extraneous air etc., prevent the magnetic reduction of rotor 80, have higher output thereby keep electro-motor 28.

Fig. 9 is the resin magnet 81 of the rotor 80A of the 1st variation that shows present embodiment respectively and the exploded perspective view that roughly constitutes of rotor-side yoke 82.In addition, for Fig. 9, in order to illustrate that rotor-side yoke 82 is the general cylindrical shape shape that has with the stator 41 circular 82a of annulus portion in opposite directions easily.

The rotor 80A of present embodiment, as shown in Figure 9, have with circular be applied in be formed on magnet 81 by each adhering part 84a on comprehensively of all gate parts 83 on the bonding plane 81a, the magnet forward surface of rotor-side yoke 82 is adhered to being gone up by bonding plane 81a of magnet 81 by adhering part 84a and constitutes rotor 80A.

Promptly, in the present embodiment, whole gate parts 83, promptly, owing to smeared adhering part 84a to surround whole mode that epidermal area peels off the position, if so by this adhering part 84a the magnet forward surface of the 82a of annulus portion of rotor-side yoke 82 is bonded together, the whole of gate part 83 are filled up by rotor-side yoke 82, can make gate part 83 keep airtight conditions with respect to the extraneous air around it.

So, as mentioned above, can suppress gate part 83 and produce rust, prevent the magnetic reduction of rotor 80A and keep electro-motor 28 to have higher output.

Figure 10 is the resin magnet 81 of the rotor 80B of the 2nd variation that shows present embodiment respectively and the exploded perspective view that roughly constitutes of rotor-side yoke 82.In addition, for Figure 10, in order to illustrate that rotor-side yoke 82 is the general cylindrical shape shape that has with the stator 41 circular 82a of annulus portion in opposite directions easily.

As shown in figure 10, the rotor 80B of this variation has: be formed on being applied in by the adhering part on the bonding plane 81a 84 with circular by the mode of all gate parts 83 on the bonding plane 81a of magnet 81 to surround respectively, with be applied in by the adhering part 84b of bonding plane 81a with polygon roughly in the interior mode that encases whole gate part 83, the magnet forward surface of the 82a of annulus portion of rotor-side yoke 82 by adhering

part

84 and 84b be adhered to magnet 81 by on the bonding plane 81a, constitute rotor 80.

For this variation, the whole of gate part 83 are filled up by rotor-side yoke 82, can make gate part 83 keep airtight conditions with respect to the extraneous air around it.

So, as mentioned above, can suppress gate part 83 and produce rust, prevent the magnetic reduction of rotor 80B and keep electro-motor 28 to have higher output.

Figure 11 is the resin magnet 81 of the rotor 80C of the 3rd variation that shows present embodiment respectively and the exploded perspective view that roughly constitutes of rotor-side yoke 82.In addition, for Figure 11, in order to illustrate that rotor-side yoke 82 is the general cylindrical shape shape that has with the stator 41 circular 82a of annulus portion in opposite directions easily.

As shown in figure 11, the rotor 80C of present embodiment has: be applied in by the adhering part on the bonding plane 81a 84 with circular in the mode that is the circular littler than the inscribed circle diameter by all gate parts 83 on the bonding plane 81a that is formed at magnet 81, with be applied in by the adhering part 84d of bonding plane 81a with circular in the interior mode that encases whole gate part 83, the magnet forward surface of the 82a of annulus portion of rotor-side yoke 82 by adhering part 84c and 84d be adhered to magnet 81 by on the bonding plane 81a, constitute rotor 80.

In this variation, because whole interior all sides of gate part 83 are filled up by rotor-side yoke 82 by adhering part 84c, whole outer circumferential side of gate part 83 is filled up by rotor-side yoke 82 by adhering part 84d, like this, can make gate part 83 keep airtight conditions with respect to the extraneous air around it.

So, as mentioned above, can suppress gate part 83 and produce rust, prevent the magnetic reduction of rotor 80C and keep electro-motor 28 to have higher output.

Figure 12 is the resin magnet 81 of the rotor 80D of the 4th variation that shows present embodiment respectively and the exploded perspective view that roughly constitutes of rotor-side yoke 82.In addition, for Figure 12, in order to illustrate that rotor-side yoke 82 is the general cylindrical shape shape that has with the stator 41 circular 82a of annulus portion in opposite directions easily.

As shown in figure 12, the rotor 80D of present embodiment have be applied in magnet 81 by the adhering part 84e of bonding plane 81a on comprehensively, the magnet forward surface of the 82a of annulus portion of rotor-side yoke 82 by adhering part 84e be adhered to magnet 81 by on the bonding plane 81a, constitute rotor 80.

In this variation,, can make gate part 83 keep airtight conditions with respect to the extraneous air around it owing to comprised being filled up by rotor-side yoke 82 by adhering part 84e of whole gate parts 83 comprehensively by bonding plane 81a.

So, can suppress gate part 83 and produce rust, prevent the magnetic reduction of rotor 80D and keep electro-motor 28 to have higher output.

In addition, in the present embodiment, though the various shapes of smearing by the adhesives on the bonding plane 81a that are applied in magnet 81 are illustrated, but the present invention not only is defined in this, as long as under state, magnet 81 and rotor-side yoke 82 are bonded together, comprise any shape of smearing with gate part 83 sealings.

(the 3rd execution mode)

Figure 13 A has shown that the resin magnet 91 with the rotor 90 of making the 3rd execution mode of the present invention is the figure of the injection molding device for molding 100 of purpose.

As shown in FIG. 13A, injection molding device for molding 100 has: so that the mixture (resin) of magnet powder and tackifying resin is injected injection device 101 into purpose as moulding material, has mould 103 corresponding to the cavity (cavity) 102 of the shape of the object that will make (shaping) (resin magnet 91), to transfer into the down gate 104 in the mould 103 from the magnet powder of injection device 101 ejaculations and the mixture C of tackifying resin, to be directed to the runner gate 105 in the mould cavity 102 by resin material (mixture) C that this down gate 104 is transferred, and as cast gate 106 from this runner gate 105 inlet during the potting resin material in mould cavity 102.

Then, the mould cavity 102 of the injection molding device for molding 100 of present embodiment corresponding to formed products (resin magnet) by on the cavity face 102a of bonding plane 91a, as shown in FIG. 13A, the concavo-convex processing of implementing to know clearly, cavity face 102a is a male and fomale(M﹠F).In addition, cavity face 102a also can be shown in Figure 13 B, and male and fomale(M﹠F) is in illustrated bottom.

Figure 14 is for showing the figure that is generated the resin magnet 91 of (shaping) by the injection molding device for molding 100 shown in Figure 13 A.

As shown in figure 14, being by bonding plane 91a and the corresponding male and fomale(M﹠F) of the male and fomale(M﹠F) of above-mentioned cavity face 102a on the resin magnet 91, can stop corresponding to by the formation of the superficial layer of bonding plane 91a.

Below, serving as the basis with the injection molding device for molding 100 of present embodiment describes the manufacture process of resin magnet 90, simultaneously, the effect of present embodiment is described.

That is, when making resin magnet 90,, transfer, be filled in the mould cavity 102 by runner gate 105 and cast gate 106 injections by down gate 104 from the magnet powder of injection device 100 ejaculations and the mixture (resin) of tackifying resin.

At this moment, since lower with the contacted part of wall (surface of the shaping thing) temperature of the mould 103 of low temperature, superficial layer 110 (with reference to Figure 15) formed on its shaping thing surface.

Here, resin material fully is filled in the mould cavity 102, and when injection was finished, the resin material in the mould cavity solidified.

Yet, well-known, before the injection-molded resin material has just solidified,, can produce shear fracture (with reference to Figure 16) between formed products and the epidermal area owing to applied the pressure maintenance.

At this moment, according to present embodiment, since with formed products C (resin magnet 91) be male and fomale(M﹠F) by the corresponding cavity face 102a of bonding plane 91a, shear fracture by formed products C, be formed at by the superficial layer 110 of bonding plane 91a and broken by the jog of cavity face 102a institute's drawing, formed products C's (resin magnet 91) is corresponding with the male and fomale(M﹠F) of cavity face 102a by bonding plane 91a, and becomes the male and fomale(M﹠F) (with reference to Figure 18) of no epidermal area.

Afterwards, open mould 103, can generate circular resin magnet 91 as formed products.

That is, for this structure, when injection moulding, by effect corresponding to the cavity face 102a of shear fracture, for as the resin magnet 91 of formed products C by bonding plane 91a, can automatically implement burning into sand (concavo-convex processing).

So, in the time of on the magnet forward surface of the bonding annulus portion that does not have the rotor-side yoke that shows in the drawings by bonding plane 91a of resin magnet 91, it is bigger that the bond area of its bonding plane (by bonding plane 91a) is compared with common plane, thereby can improve the adhesive strength of resin magnet 91.

As above narrate, according to present embodiment, even used the rotor 90 of the resin magnet 91 that generates by injection moulding, also can be under the situation of appending processing of not carrying out the surface modification quality treatment, in its injection forming process, for can automatically be implemented concavo-convex processing (burning into sand processing) by bonding plane 91a, remove scalping, thereby can improve the adhesive strength of the resin magnet 91 that produces by above-mentioned injection moulding.

Resin magnet 91 can be used in rotor with on the purposes beyond the magnet.

In addition, in above-mentioned various execution modes, though rotor of the present invention can be used in the axial-gap rotary electric machine that is loaded in automatic two-wheeled cycle, but the present invention is not limited only to this, also can be used in lift-launch on the axial-gap rotary electric machine of other device/machine, can obtain above-mentioned effect.

And, in each above-mentioned execution mode, as the axial-gap rotary electric machine that has carried rotor of the present invention, though axial-gap rotary electric machine (electro-motor) is illustrated, but the present invention is not limited only to this, make rotor from external rotating, in coil, produce electromotive force, also can be used as so-called generator and use.

In addition, in each above-mentioned execution mode, as the electric rotating machine that has used rotor of the present invention, though axial-gap rotary electric machine (electro-motor) is illustrated, but the present invention is not limited only to this, the radial gap type electric rotating machine, promptly, magnet is parallel with rotation axis with the mutual forward surface of several teeth, and the gap between its forward surface also can be used for form radial gap type electric rotating machine cylindraceous along rotation axis.

As mentioned above, rotor according to record in the technical scheme 1 to 4 of the present invention, to have a side among magnet and the yoke at least, the end side or the central portion side that are configured as between the gap of the adhesives between the 2nd bonding plane of the 1st bonding plane of magnet and the yoke at least one side among the 1st and the 2nd bonding plane become tapered shape.

Therefore, be that certain situation is compared with gap between the 1st and the 2nd bonding plane, even under the situation of little load short time, the adhesives in mediate crack can be overflowed from its gap.

So, do not increase and make energy or prolong manufacturing time, also the 1st bonding plane of magnet and the 2nd bonding plane of yoke can be bonded together conscientiously and securely, can avoid bonding bad and deterioration that the manufacturing the followed step is detained or the shortcomings such as shortening of loading the life of product of rotor machine.

And, according in the technical scheme 5 to 8 of the present invention the record rotor, resin magnet surrounded cast gate at least by bonding plane, adhesives is applied on this by on the bonding plane like this, by this adhesives, can be made above-mentioned cast gate be airtight conditions by adhesives and connect yoke.

So, can not carry out antirust processing and suppress since outer gas etc. around the gate part that causes of the influence of factor get rusty, the magnetic that can prevent rotor reduces and the machine of keeping the lift-launch rotor has higher output.

In addition, invention according to record in technical scheme 8 of the present invention or 9, molding procedure (manufacturing process) by the mould that has used cavity face with concaveconvex shape, since can obtain with the corresponding male and fomale(M﹠F) of cavity face as by the resin magnet of bonding plane, so resin magnet compared increase by the area of bonding plane than plane situation, can improve the adhesive strength of resin magnet.

Claims

1. rotor is characterized by and has: be equipped with contain gate part by the resin magnet of bonding plane, above-mentioned be applied on by bonding plane with surrounding above-mentioned gate part at least this by the adhesives of bonding plane and by above-mentioned adhesives above-mentioned relatively by bonding plane with above-mentioned gate part with the bonding yoke of airtight conditions; The circular magnet forward surface of described magnet and described yoke relative to, the gate part of described magnet is arranged at bonding plane described magnet, mutually bonding with the annulus portion of described yoke.

2. the rotor described in claim 1, it is characterized by: it is comprehensive that above-mentioned adhesives is applied in above-mentioned gate part.

3. the rotor described in claim 1, it is characterized by: above-mentioned adhesives is applied in and contains the comprehensive by bonding plane of above-mentioned gate part.

4. the rotor described in claim 1, it is characterized by: above-mentioned adhesives is smeared to such an extent that do not cover above-mentioned gate part and is only surrounded above-mentioned gate part.