CN1139171C - Electric motor for vibrating generation - Google Patents
Electric motor for vibrating generation Download PDFInfo
- Publication number
- CN1139171C CN1139171C CNB991036271A CN99103627A CN1139171C CN 1139171 C CN1139171 C CN 1139171C CN B991036271 A CNB991036271 A CN B991036271A CN 99103627 A CN99103627 A CN 99103627A CN 1139171 C CN1139171 C CN 1139171C
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- rotating shaft
- balance weight
- electric motor
- motor
- guide part
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
A motor for vibration generation 21 is constituted of a motor 24, where a rotary shaft 22 protrudes outward and a balancer 23 fitted to the rotary shaft so that a centroid is shifted from the center of the rotary shaft. The balancer 23 has a guide part 25, which extends in the direction of the rotary shaft and becomes a positioning mark at its fitting to the rotary shaft at a part on an outer peripheral face extending a fitting shaft 23c to which the rotary shaft is fitted. The invention can simplify the constitution of a jig used for assembly work, to reduce the number of item parts, and to improve workability.
Description
The present invention relates to for example in mobile phone, beep-pager, game machine etc., to be used for vibration is taken place and the electric motor for vibrating generation of usefulness is experienced in the vibration calling when collecting mail, the health of game content.
Existing this electric motor for vibrating generation, structure such as Figure 10 and shown in Figure 11.That is, in Figure 10, electric motor for vibrating generation 1 comprises the small-sized DC motor 4 and the eccentric balancing blocks 3 that is installed on the axially outstanding rotating shaft 2 of motor 4 of known configurations.
Above-mentioned eccentric balancing blocks 3, be provided with notch 3b on the top of circle, so that the center of deviation of gravity center rotating shaft 2, be provided with installation shaft 3c with axis hole 3a at the central part of notch 3b, the rotating shaft 2 of chimeric small-sized DC motor 4 in this axis hole 3a is by installing with caulking part 3d riveted joint.
As shown in figure 11, described caulking part 3d, by the top from installation shaft 3c is that anchor clamps such as drift are depressed in the top of vertical line, just can be at position 3e, 3e and the crimping point 3f symmetrical with the vertical line that is located at the installation shaft 3c on the balance weight 3, with inner face and rotating shaft 2 crimping of axis hole 3a, become the riveted and fixed of three-point support, owing to obtain the fixed-site of balance, so can seek the dispersion of uniform force, become anti-structure in long-term use.
Adopt structural vibrations like this to take place with motor 1, by from the outside suitably to the energising of each winding (all not shown) of rotor, then rotor is done the rotation driving around rotating shaft 2, because this moment is by being equipped with balance weight 3 on rotating shaft 2, and the center of the deviation of gravity center rotating shaft 2 of balance weight 3, so the integral body of motor 1 just produces vibration.
In this existing electric motor for vibrating generation 1, when being installed in balance weight 3 on the rotating shaft 2, use anchor clamps shown in Figure 12 to install, now its structure is described.
Figure 12 is the stereogram of expression major part, and among the figure, for putting on same-sign with the corresponding part of Figure 10, it describes omission in detail.
5 is riveted joint anchor clamps among the figure, comprising: put on base 6, will above make roughly V word shape as the counterweight shape bearing 7 of putting surface 7a; The guide way 8 that is located at counterweight shape bearing 7 rears, the rotating shaft 2 of motor 4 is led and keeps; The counterweight shape pressure bar 10 that utilizes not shown working cylinder to push to putting balance weight 3 on counterweight shape bearing 7 putting surface 7a and moving horizontally and to rotating shaft 2 directions; From the top to the par of the notch 3b of balance weight 3 push the location by pad 9,9 (utilizing spring 9a, 9a to make pressing force downwards); Caulking part 3d (with reference to Figure 10) with balance weight 3 carries out the drift tooth 11 that riveted and fixed is used with rotating shaft 2.
When by riveting anchor clamps 5 as constituted above when balance weight 3 being installed on the rotating shaft 2 of motor 4, utilization keeps motor 4 with the big or small corresponding holding device (not shown) of motor 4, and rotating shaft 2 guiding of motor 4 are remained on the guide way 8, meanwhile upload and put balance weight 3 at the putting surface 7a of counterweight shape bearing 7, under the axis hole 3a of balance weight 3 state relative with rotating shaft 2 tops of motor 4, by the front of pushing balance weight 3, the rotating shaft 2 of motor 4 is inlaid in the axis hole 3a last (chain-dotted line diagram) of installation shaft 3c with counterweight shape pressure bar 10.
Then, as Figure 10 and shown in Figure 11, described caulking part 3d, for with the symmetrical position of the vertical line that is located at the installation shaft 3c on the balance weight 3 with the inner face of axis hole 3a and rotating shaft 2 crimping and fixed by three-point support, and be fixed in the position that obtains balance, push positioning balance piece 3 from the top by par by the notch 3b of 9,9 pairs of balance weights 3 of pad, drift tooth 11 is descended, with caulking part 3d, 3d with rotating shaft 2 riveted and fixed of motor 4 on the axis hole 3a of balance weight 3.
In above-mentioned example, the installing and fixing method of balance weight 3 on rotating shaft 2 illustrated the situation of the riveted and fixed among caulking part 3d, the 3d but also have rotating shaft 2 to be pressed into situation about being fixed in the axis hole 3a, in this case, above-mentioned drift tooth 11 is not set.
But, for the riveting mechanism that balance weight 3 is installed on the rotating shaft 2 of the small-sized DC motor 4 that as above constitutes, must be pressed into the operating efficiency that improves riveted and fixed with riveted and fixed to correct position, as detent mechanism, make the putting surface 7a of V word shape on the top of counterweight shape bearing 7, upload at this putting surface 7a and to put balance weight 3, about falling from the top simultaneously by pad 9,9, because the par of the notch 3b by pushing balance weight 3 is carried out level correction to balance weight 3 and is located, so counterweight shape bearing 7 is complex-shaped, and need to press pad 9,9, thereby press pad 9,9 become complicated with the linkage from top to bottom supporting device of drift tooth 11, exist operating efficiency and worsen, the part number is many and make the clamp structure complicated problems that becomes.
Problem in view of above-mentioned existence the objective of the invention is to, and provides a kind of and is used to assemble clamp structure simplification, the minimizing part number of processing and improves the electric motor for vibrating generation of processing operation.
The 1st technical scheme of the present invention is that electric motor for vibrating generation comprises: to the motor of the outstanding rotating shaft in outside; Make the center of deviation of gravity center rotating shaft and be installed in balance weight on the described rotating shaft; Its characteristics are, balance weight be provided with on the outer peripheral face part beyond the rotating shaft along the rotating shaft direction extend on being installed in rotating shaft the time become the guide part of location, address the above problem thus.
In addition, the 2nd technical scheme of the present invention is, as technical scheme 1 described electric motor for vibrating generation, its characteristics are, preferably guide part is located on the outer peripheral face center with the rotating shaft opposition side.
In addition, the of the present invention the 3rd and the 4th technical scheme is that guide part is the groove or the plane of concavity, addresses the above problem thus.
In addition, the 5th technical scheme of the present invention is, as technical scheme 1 or 3 or 4 described electric motor for vibrating generation, its characteristics are, guide part is located on the position that is not with the outer peripheral face center of rotating shaft opposition side.
Adopt said structure, electric motor for vibrating generation comprises: to the motor of the outstanding rotating shaft in outside; Make the center of deviation of gravity center rotating shaft and be installed in balance weight on the described rotating shaft, since be provided with on the outer peripheral face part of balance weight beyond the rotating shaft along the rotating shaft direction extend on being installed in rotating shaft the time become the guide part of location, therefore, unit needs to make on the top of existing counterweight shape bearing the putting surface of complicated V word shape, do not need to position yet usefulness by pad, thereby the clamp structure that can be used to assemble processing is oversimplified, is reduced the part number and improves the processing operation.
Be located on the outer peripheral face center with the rotating shaft opposition side by the guide part with balance weight, then balance weight is formed centrally symmetry in just with rotating shaft being, thereby can carry out high-precision balance weight being installed in location on the rotating shaft.
Because the guide part of balance weight is the groove of concavity, and will be formed on the top of counterweight shape bearing with the rib of the corresponding convex of shape on the groove of this concavity or plane, just can the rib of the groove of concavity and convex is chimeric with simple operation, so can carry out extremely simple and be easy to balance weight is installed in location on the rotating shaft, thereby can make clamp structure oversimplify, reduce the part number and improve the processing operation.Especially be under the situation on plane at guide part, the top of counterweight shape bearing can be made not only well but also very simple structure with the plane.
In addition, when the guide part of balance weight is located on the position that is not with the outer peripheral face center of rotating shaft opposition side, owing to can utilize the putting surface of the V word shape of existing counterweight shape bearing, so be effective.
Fig. 1 represents the 1st example of electric motor for vibrating generation of the present invention, (A) is end view, (B) is the stereogram of balance weight bottom surface direction.
Fig. 2 processes the stereogram that describes to the assembling of electric motor for vibrating generation shown in Figure 1.
Fig. 3 is the end view of other example of balance weight of expression electric motor for vibrating generation shown in Figure 1.
Fig. 4 is the end view of the another example of balance weight of expression electric motor for vibrating generation shown in Figure 1.
Fig. 5 is the end view of the 2nd example major part of expression electric motor for vibrating generation of the present invention.
Fig. 6 is the end view of the 3rd example major part of expression electric motor for vibrating generation of the present invention.
Fig. 7 is the partial perspective view that the assembly method to the electric motor for vibrating generation of Fig. 6 describes.
Fig. 8 represents the 4th example of electric motor for vibrating generation of the present invention, (A) is the stereogram of expression major part, (B) is the cutaway view of caulking part.
Fig. 9 is the stereogram of the 5th example of expression electric motor for vibrating generation of the present invention.
Figure 10 is the stereogram of the existing electric motor for vibrating generation of expression.
Figure 11 is the cutaway view of the major part that describes of the riveted and fixed portion to electric motor for vibrating generation shown in Figure 10.
Figure 12 processes the stereogram that describes to the assembling of electric motor for vibrating generation shown in Figure 10.
Below, in conjunction with Fig. 1 to Fig. 9 the invention process form is described.
Fig. 1 represents an example of electric motor for vibrating generation of the present invention, (A) is end view, (B) is the stereogram of seeing from the bottom direction of balance weight, and Fig. 2 is a stereogram of the assembling of electric motor for vibrating generation of the present invention being processed the major part that describes.
Among the figure, electric motor for vibrating generation 21 comprises the small-sized DC motor 24 and the eccentric balancing blocks 23 that is installed on the rotating shaft of giving prominence to the outside of motor 24 22 of known configurations.
Above-mentioned eccentric balancing blocks 23, be provided with notch 23b on the top of circle, so that the center of deviation of gravity center rotating shaft 22, notch 23b is flat condition, and be provided with installation shaft 23c with axis hole 23a at the central part of this notch 23b, the rotating shaft 22 of chimeric small-sized DC motor 24 in this axis hole 23a is by installing (identical with Figure 10 and existing example shown in Figure 11) with caulking part riveted joint.
Though said structure and Figure 10 and existing electric motor for vibrating generation 1 shown in Figure 11 are identical, but in the electric motor for vibrating generation 21 of the invention process form, structure part inequality is that balance weight 23 is provided with the guide part 25 that extends along rotating shaft 22 directions on the outer peripheral face part beyond the installation shaft 23c that motor 24 rotating shafts 22 are installed.
Above-mentioned guide part 25 is the concavity groove 25a of squarely, when the outer peripheral face central authorities beyond the above-mentioned installation shaft 23c, be installation shaft 23c under position when forming, just the vertical line with installation shaft 23c makes balance weight 23 equilibriums symmetrically, thus, location when being installed in the installation shaft 23c axis hole 23a as the rotating shaft 22 that utilizes riveted joint anchor clamps described later with motor 24 just can very simply and accurately position.In addition, adopt this example, can evenly keep with installation shaft 23c is the balance of the balance weight 23 at center, and its result can obtain uniform vibration, thereby can be anti-in long-term use as electric motor for vibrating generation 21.
29 is riveted joint anchor clamps among the figure, comprising: put the counterweight shape bearing 27 on base 26; The guide way 28 that is located at the rear of counterweight shape bearing 27, the rotating shaft 22 of small-sized DC motor 24 is led and keeps; The counterweight shape pressure bar 30 that utilizes not shown working cylinder to push to putting balance weight 23 on counterweight shape bearing 27 and moving horizontally and to rotating shaft 22 directions; The drift tooth 31 of installation shaft 23c riveted and fixed on rotating shaft 22 with balance weight 23.
In the invention process form that as above constitutes, riveted joint anchor clamps 29 with existing difference are, no existing carry out that level correction uses by pad 9,9, top at counterweight shape bearing 27, do not make the putting groove 7a of V word shape and make flat condition, central authorities are provided with the prominent bar 27a of guide part (the concavity groove that is square among the figure) 25, the corresponding guiding of 25a along rotating shaft 2 direction extensions, shape and balance weight 23 in the above.
When by riveting the axis hole 23a of anchor clamps 29 as constituted above when being installed on the rotating shaft 22 of the motor 24 shown in the invention process form with the installation shaft 23c of balance weight 23, utilization keeps motor 24 with the big or small corresponding holding device (not shown) of motor 24, and rotating shaft 22 guiding of motor 24 are remained on the guide way 28, meanwhile by with above-mentioned guide part (groove that is concavity among the figure) 25, the prominent bar 27a that forms on 25a and the counterweight shape bearing 27 fastens and positions, upload at counterweight shape bearing 27 and to put balance weight 23, under the state that aligns on rotating shaft 22 tops of the axis hole 23a of balance weight 23 and motor 24, by the front of pushing balance weight 23, the rotating shaft 22 of motor 24 is inlaid in the axis hole 23a of installation shaft 23c (chain-dotted line diagram) with counterweight shape pressure bar 30.Then, as shown in the figure, drift tooth 31 is descended and with Figure 10 and caulking part 3d, 3d shown in Figure 11 with rotating shaft 22 riveted and fixed of motor 24 in the axis hole 23a of balance weight 23, be assembled into electric motor for vibrating generation 21.
As mentioned above, the electric motor for vibrating generation 21 of this example, because balance weight 23 is provided with the guide part 25 that extends along rotating shaft 22 directions on the outer peripheral face part beyond the installation shaft 23c that motor 24 rotating shafts 22 are installed, so can make flat condition above the counterweight shape bearing 27 of riveted joint anchor clamps 29, just can on its face, only form and extend along rotating shaft 22 directions, the guide part of shape and balance weight 23 (the concavity groove that is square among the figure) 25, the corresponding guiding of 25a is dashed forward bar 27a and is become simple structure, what need not to form on the top of existing counterweight shape bearing 7 V word shape puts groove 7a, and do not have carry out that level correction uses by pad 9,9, its result can provide a kind of anchor clamps 29 that will be used to assemble processing to simplify the structure, reduce the part number and improve the electric motor for vibrating generation 21 of processing operation.
In this example, talked the installing and fixing method of installation portion 23c on rotating shaft 22 of balance weight 23 with regard to the situation of the riveted and fixed of caulking part, but also have rotating shaft 22 is pressed into situation about being fixed in the axis hole 23a, in this case, above-mentioned drift tooth 31 is not set.
Fig. 3 and Fig. 4 represent the variation separately of guide part 25, even make the concavity groove 35a of cross section semicircular in shape as shown in Figure 3 or as shown in Figure 4 cross section concavity groove 45a triangular in shape same effect is also arranged, in this case, corresponding with each groove, the shape of the prominent bar 27a of the guiding that forms on the counterweight shape bearing 27 of riveted joint anchor clamps 29 is also made prominent bar (not shown) or the cross section prominent bar (not shown) triangular in shape of cross section semicircular in shape.
Fig. 5 is the end view of major part of the 2nd example of expression electric motor for vibrating generation of the present invention, for putting on identical symbol with the corresponding part of Fig. 1, omits its detailed description.53 is balance weights among the figure, has to be provided with to connect the installation shaft 23c that inserts rotating shaft 22 usefulness axis hole 23a and will justify the notch 23b of the partial cut-out of counterweight shape, makes parallel with the face of notch 23b, as to be cut into par 55a guide part 55 in the bottom.
Fig. 6 and Fig. 7 are the figure of the 3rd example of expression electric motor for vibrating generation of the present invention, for putting on identical symbol with the corresponding part of Fig. 1 and Fig. 2, omit its detailed description.
Fig. 6 is the end view of the electric motor for vibrating generation major part of this example of expression, 63 is balance weights among the figure, have and be provided with the installation shaft 23c that connect to insert rotating shaft 22 usefulness axis hole 23a and will justify the notch 23b of the partial cut-out of counterweight shape, on middle position periphery, non-, be formed with along the rotating shaft direction extend by the guide part 65 that leads and constitute with square concavity groove 65a.
When the balance weight 63 that will so constitute is installed on the rotating shaft 22, as shown in Figure 7, in riveted joint anchor clamps 5 same as the prior art, putting on the groove 7a of the V word shape that is formed at counterweight shape bearing 7 tops, with with guide part 65 corresponding positions and the shape that square concavity groove 65a is constituted the prominent bar 27b of guiding is set by the guiding of above-mentioned balance weight 63, owing to can make detent mechanism as long as guide part 65 just engaged with the bar 27b that should dash forward, so can utilize existing counterweight shape bearing 7, and do not need that use resemble the prior art depresses downwards about by pad 9,9 carry out level correction and location, so can do the structure of riveted joint anchor clamps 5 simply.
In addition, guide part 65 in this example, its cross section also the concavity groove 35a of semicircular in shape or concavity groove 45a triangular in shape replace above-mentioned guiding with square concavity groove 65a, even with the structure of par 55a and usefulness, also can obtain same effect (with reference to Fig. 3 to Fig. 6).
Fig. 8 is the figure of the 4th example of expression electric motor for vibrating generation of the present invention, (A) be the stereogram of the major part before the riveted joint, (B) cutaway view of expression riveting portion, so-called above-mentioned each example, expression is installed in structure example inequality on the motor rotation axis with balance weight.
81 is electric motor for vibrating generation among the figure, eccentric balancing blocks 83 is mounted to the center of its deviation of gravity center rotating shaft 82 on motor rotation axis 82.
Promptly, balance weight 83 is provided with the notch 83b that makes flat condition on the top of circle, heart portion is provided with the U brief note or the コ brief note installation portion 83c that are made up of two prominent bar 83a, 83a that extends along rotating shaft 82 directions therein, in the central authorities of installation portion 83c outer peripheral face in addition, be that position under the installation portion 83c is formed with the guide part 85 that is made of square concavity groove 85a.
Therefore, by being fastened, the prominent bar 27a that forms on the guide part 85 that is made of the square concavity groove 85a of above-mentioned balance weight 83 and the aforementioned counterweight shape bearing 27 shown in Figure 2 positions, when behind setting-in motor rotation axis 82 between two prominent bar 83a, the 83a of above-mentioned U brief note or コ brief note installation portion 83c, by from about top or installation portion 83c, pushing with anchor clamps (not shown), then shown in Fig. 8 (B), two prominent bar 83a, the 83a of installation portion 83c are extruded, thereby with rotating shaft 82 riveted and fixed.
So in this example, the guide part 85 that forms on balance weight 83 also plays the role of positioning, can extremely simply and accurately position, can will be used to assemble clamp structure simplification, the minimizing part number of processing and improve the processing operation.In addition, the position of the guide part 84 of this example and shape can be made various structure as described above or they are made up, and omission is described.
Fig. 9 is the figure of the 5th example of expression electric motor for vibrating generation of the present invention, so-called above-mentioned each example, and expression is installed in structure example inequality on the motor rotation axis with balance weight.
90 is electric motor for vibrating generation among the figure, eccentric balancing blocks 93 is mounted to the center of its deviation of gravity center rotating shaft 92 on motor 91 rotating shafts 92.
Here, because the outer peripheral face central authorities of balance weight 93 beyond the installation portion 93c, be installation portion 93c under the position be formed with the guide part 95 that constitutes by square concavity groove 95a, therefore, position by engaging with formed prominent bar 27a on the aforementioned counterweight shape bearing 27 shown in Figure 2, push the front of balance weight 93 again by pressure bar 30 with counterweight shape, drift tooth 31 is descended, with caulking part 93d, 93d with motor 91 rotating shafts 92 riveted and fixed in the axis hole 93a of balance weight 93, be assembled into electric motor for vibrating generation 90.
Therefore, in this example, the guide part 95 that forms on balance weight 93 also plays the role of positioning, and can extremely simply and accurately position, and can will be used to assemble clamp structure simplification, the minimizing part number of processing and improve the processing operation.In addition, the position of the guide part 95 of this example and shape can be made various structure as described above or they are made up, and omission is described.
From as above learning, in electric motor for vibrating generation of the present invention, on the outer peripheral face part of balance weight beyond the rotating shaft if form along the rotating shaft direction extend on being installed in rotating shaft the time become the guide part of location, just can reduce that balance weight is installed in the part number of the anchor clamps of using on the rotating shaft and makes simple structure, not only can reduce its fee of material etc. but also can improve operation.
In addition, when the guide part of balance weight was located on the outer peripheral face center with the rotating shaft opposition side, balance weight was formed centrally symmetry in just with rotating shaft being, thereby can carry out high-precision balance weight being installed in location on the rotating shaft.
In addition, because the guide part of balance weight is the groove of concavity, and will be formed on the top of counterweight shape bearing with the rib of the corresponding convex of shape on the groove of this concavity or plane, just can the rib of the groove of concavity and convex is chimeric with simple operation, so can carry out extremely simple and be easy to balance weight is installed in location on the rotating shaft, thereby can make clamp structure oversimplify, reduce the part number and improve the processing operation.Especially be under the situation on plane at guide part, the plane can be made not only well but also very simple structure in the top of counterweight shape bearing.
In addition, when if the guide part of balance weight is located on the position that is not with the outer peripheral face center of rotating shaft opposition side, can utilize that prior art is employed to be installed in the counterweight shape bearing of sectional fixture on the rotating shaft with it, in addition, owing to can reduce the part number, it is just simpler that historical facts or anecdotes is executed electric motor for vibrating generation of the present invention, both can reduce fee of material etc., can improve operation again.
Claims (5)
1. an electric motor for vibrating generation comprises: to the motor of the outstanding rotating shaft in outside; Make the center of deviation of gravity center rotating shaft and be installed in balance weight on the described rotating shaft; It is characterized in that,
Described balance weight be provided with on the outer peripheral face part of installing beyond the installation shaft of described rotating shaft along described rotating shaft direction extend on being installed in described rotating shaft the time become the guide part of location.
2. electric motor for vibrating generation as claimed in claim 1 is characterized in that, described guide part is located on the outer peripheral face center with described installation shaft opposition side.
3. electric motor for vibrating generation as claimed in claim 1 or 2 is characterized in that, described guide part is the concavity groove.
4. electric motor for vibrating generation as claimed in claim 1 or 2 is characterized in that described guide part is the plane.
5. electric motor for vibrating generation as claimed in claim 1 is characterized in that, described guide part is located on the position that is not with the outer peripheral face center of described rotating shaft opposition side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10064791A JPH11252856A (en) | 1998-02-27 | 1998-02-27 | Motor for generating vibration |
| JP64791/98 | 1998-02-27 | ||
| JP64791/1998 | 1998-02-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1228638A CN1228638A (en) | 1999-09-15 |
| CN1139171C true CN1139171C (en) | 2004-02-18 |
Family
ID=13268423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991036271A Expired - Fee Related CN1139171C (en) | 1998-02-27 | 1999-03-01 | Electric motor for vibrating generation |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH11252856A (en) |
| CN (1) | CN1139171C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010053903A (en) * | 1999-12-02 | 2001-07-02 | 노대성 | Vibration motor comprising vibrator |
| CN109981830B (en) * | 2017-12-28 | 2020-12-04 | Oppo广东移动通信有限公司 | Centrifugal motor, electronic device and method for adjusting angle of electronic device |
| DE102019110714B3 (en) * | 2019-04-25 | 2020-07-23 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Electric machine rotor and method of manufacturing the same |
-
1998
- 1998-02-27 JP JP10064791A patent/JPH11252856A/en active Pending
-
1999
- 1999-03-01 CN CNB991036271A patent/CN1139171C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11252856A (en) | 1999-09-17 |
| CN1228638A (en) | 1999-09-15 |
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