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21. 发明专利

JPH10295601A VACUUM CLEANER 失效
公开(公告)号：JPH10295601A
公开(公告)日：1998-11-10
申请号：JP10613497
申请日：1997-04-23
申请人： HITACHI LTD
发明人： YAMAMOTO WATARU , IWAO AKIRA , SUGA HISANAKA , TOYOSHIMA HISANORI
IPC分类号： A47L9/26 , A47L9/28
摘要： PROBLEM TO BE SOLVED: To provide a vacuum cleaner whose operating means of a machine body can effectively be fabricated at low cost. SOLUTION: A vacuum cleaner is equipped with a pedal 57 having a cord reel side tread 63 for manipulating the takeup motion of a cord reel 3 and a switch side tread 73 for turning on and off a power switch 24, and is formed in a single piece structure. The pedal 57 has an approx. U-shaped part 74 opening to the over-part and deformable elastically, and when the pedal is stamped, the part 74 borne by a rib 76 of an upper case 7 makes elastic deformation, and thereby, the component generated at one tread and transmitted to the other tread is absorbed.

22. 发明专利

JPH1080107A BRUSH DEVICE OF ROTATING MACHINE 失效
公开(公告)号：JPH1080107A
公开(公告)日：1998-03-24
申请号：JP23385096
申请日：1996-09-04
申请人： HITACHI LTD
发明人： AKOJIMA KAZUHIRO , JORAKU FUMIO , TOYOSHIMA HISANORI
IPC分类号： H02K13/00
摘要： PROBLEM TO BE SOLVED: To provide an efficient rotating machine by reducing the electric loss caused by the contact between a brush and a commutator. SOLUTION: This rotating machine has a brush 8 whose end face slides on a rotating armature 7 and also which is connected electrically with the armature 7, and the sliding face with the said armature of the brush is provided with at least one hole 13a and 13b or recess, and the inner faces of the holes 13a and 13b or the recesses are plated with metal. Or, this rotating machine has a brush 8 whose end face slides on a rotating armature 7 and also which is connected electrically with the armature 7, and the sliding face with the said armature of the brush is provided with at least one hole 13a and 13b or recess, and the holes 13a and 13b or the recesses are charged with conductive paste.

23. 发明专利

JPH0919088A MOTOR 失效
公开(公告)号：JPH0919088A
公开(公告)日：1997-01-17
申请号：JP16176895
申请日：1995-06-28
申请人： HITACHI LTD
发明人： NAKAI TAKAHIRO , TOYOSHIMA HISANORI , OGAWA FUMIHIRO
IPC分类号： H02K1/00 , H02K5/00
摘要： PURPOSE: To make it possible to reduce the distance in axial direction from the end face of a winding to a snap ring by attaching ring-shaped portions to an armature core of a shaft insulating cylinder and to an end portion at the opposite side, the diameter of which is larger than that of the shaft insulating cylinder. CONSTITUTION: By providing a ring-shaped portion 18 on the outer periphery of an end portion at the side of a snap ring 17 of a shaft insulating cylinder pressed into the end face of an armature core 11, a creeping distance and an insulating distance in space from the snap ring 17 to the axial end face of a winding 15 is extended. By doing this, an allowance can be created in the insulating distance and thus the position of the snap ring 17 in axial direction can be put closer to the winding 15. As a result, the position of the snap ring 17 can get closer to the armature core 11, and the dimension in the axial direction of a motor portion can be reduced effectively.

24. 发明专利

JPH094643A ELECTRIC MOTOR AND MOTOR-DRIVEN BLOWER 失效
公开(公告)号：JPH094643A
公开(公告)日：1997-01-07
申请号：JP15478995
申请日：1995-06-21
申请人： HITACHI LTD
发明人： TOYOSHIMA HISANORI , OGAWA FUMIHIRO , JORAKU FUMIO , KAWAGUCHI TAKAO , KUSANO HIROYUKI
IPC分类号： F04D29/046 , F04D29/04 , F04D29/059 , F16C35/067 , H02K5/167
摘要： PURPOSE: To provide an electric motor and a motor-driven blower capable of restricting turning motion of a rolling bearing outer ring, preventing any creep phenomenon and extending its rotational service life. CONSTITUTION: A hole part 25 capable of injecting a bond on the inner side of a bearing holding part 1A is provided on the circumferential wall of the bearing holding part 1A for holding a bearing 3A supporting the rotary shaft 5 of a rotor, further, a recess is provided, while communicating with the hole part 25, on the inner peripheral surface of the bearing holding part 1A and along the axial direction of the bearing holding part 1A. Owing to this arrangement, the creep phenomenon of a rolling bearing is prevented and by extending the rotational service lives of an electric motor and a motor-driven blower, the reliability the electric motor and the motor-driven blower can be improved. In addition, by making a gap between the inner diameter of the bearing holding part except the recess and the outer diameter of the bearing, shaft center accuracy of the rolling bearing can be improved and reduction of vibration and noise of the electric motor and the motor driven blower can be attempted.

25. 发明专利

JPH08326698A MOTOR DRIVEN BLOWER 失效
公开(公告)号：JPH08326698A
公开(公告)日：1996-12-10
申请号：JP13316395
申请日：1995-05-31
申请人： HITACHI LTD
发明人： TOYOSHIMA HISANORI , OGAWA FUMIHIRO
IPC分类号： F04D17/16 , F04D29/44
摘要： PURPOSE: To fix a seal member having elastic property surely so as to prevent circulating flow surely by arranging the seal member having elasticity on the inner surface of a fan casing, and holding and fixing it by a fan casing. CONSTITUTION: The front surface shroud 11a of a centrifugal fan 11 is formed into a nearly circular cone shape, an erecting part is arrange on a circumference in the suction hole part of a fan casing 13, and it is relatively faced to the inlet of the front surface shroud 11a. A folding back part is formed so as to hold and fix a seal member 15 having elasticity. Dispersion of adhesion is not generated, and the number of the other part items is not increased, since the seal member 15 is arranged on the inner surface of the fan casing 13 and it is held and fixed by the fan casing 13. It is thus possible to carrying out positioning so as to fix the seal member 15 surely, and prevent circulating flow surely since it is brought in contact with the fan shroud 11a surely.

26. 发明专利

JPH08326697A MOTOR-DRIVEN BLOWER 失效
公开(公告)号：JPH08326697A
公开(公告)日：1996-12-10
申请号：JP13316495
申请日：1995-05-31
申请人： HITACHI LTD
发明人： TOYOSHIMA HISANORI , JORAKU FUMIO , IIZUKA SEIJI
IPC分类号： F04D17/10 , F04D29/42
摘要： PURPOSE: To prevent a stator coil from jumping out or slipping off from a throttle, and carry out miniaturization by arranging projection parts in the vicinity of the winding of the stator penetrating the hole parts of an end blanket formed integrally with a diffuser. CONSTITUTION: An end blanket 2 is installed on a housing in which stator core 20 wound with a stator coil 18 is pressed in, and projection part 19 is arranged on the stator coil 18 side in a diffuser 8 installed on the end blanket 2 or the housing 1. The projection part 19 is positioned between the stator coil 18 wound around the stator core 20 and a slot 21 when the diffuser 8 is assembled with the end blanket 2. The projection parts 19 are arranged so as to exceed the vicinity of the stator coil 18. It is thus possible to prevent a loosed wire of the stator coil 18 from jumping out from the throttle 21. Deterioration of assemblage is prevented without increasing the number of part items.

27. 发明专利

JPH08289864A ELECTRIC VACUUM CLEANER AND POWER CONSUMPTION CONTROL METHOD FOR ITS MOTOR-DRIVEN BLOWER 失效
公开(公告)号：JPH08289864A
公开(公告)日：1996-11-05
申请号：JP9661395
申请日：1995-04-21
申请人： HITACHI LTD
发明人： AKOJIMA KAZUHIRO , HOSOKAWA ATSUSHI , ITO SHOICHI , KAJI MASAKI , JORAKU FUMIO , TOYOSHIMA HISANORI , KAWAMATA MITSUHISA
IPC分类号： A47L9/28 , A47L9/00
摘要： PURPOSE: To provide an electric vacuum cleaner capable of controlling the power consumption of a motor-driven blower without deteriorating the service life, efficiency and power factor of the commutator and the brush of the motor- driven blower and without generating noise and vibration. CONSTITUTION: This electric vacuum cleaner is constituted by providing a pressure detection means 10 for detecting pressure inside the dust collection room of the electric vacuum cleaner, a current detection means 5 for detecting a current made to flow to the motor-driven blower 3 and a microcomputer 11 for obtaining a suction air rate from the detected pressure, comparing a difference between the target power consumption value of the motor-driven blower 3 set beforehand from the suction air rate and the power consumption obtained from the detected current and controlling an energizing stopping period so as to equalize the power consumption with the target power consumption value.

28. 发明专利

JPH08289509A COMMUTATOR MOTOR 失效
公开(公告)号：JPH08289509A
公开(公告)日：1996-11-01
申请号：JP8407395
申请日：1995-04-10
申请人： HITACHI LTD
发明人： TOYOSHIMA HISANORI , MORIYAMA TERUO , JORAKU FUMIO
IPC分类号： H02K3/12 , H02K3/18 , H02K3/28 , H02K15/09
摘要： PURPOSE: To improve the characteristics of a motor by winding one coil of the first and second coils having the different finishing times of commutation around all slots at first, and then winding the other coil around all the slots. CONSTITUTION: The two coils of the first coil N∥1A at the front position in the rotating direction, wherein commutation is finished at first, and the second coil N2A at the rear position in the rotating direction, wherein the commutation is finished later, are wound in a slot A of an armature core 32. The number of the windings of the first coil N1 is more than the number of the winding of the second coil N2. The winding sequence of the respective coil of the armature winding is set. After the second coil N2, whose winding number is less, is wound around the slots A-L at the entire surface in the sequence of N2A→N2 B→N2C→...N2L, the first coil N1, whose winding number is more, is wound around the slots A-L at the entire surface on the upper side in the sequence of N1A→N1B→N1c→...N1L. As a result, the coils can be wound within the period, wherein the interference to the bottom part of the neighboring slot is less, the space factor of the coil is increased and the characteristics of the motor can be improved.

29. 发明专利

JP2539532B2 失效
公开(公告)号：JP2539532B2
公开(公告)日：1996-10-02
申请号：JP10032090
申请日：1990-04-18
申请人： HITACHI LTD
发明人： OHARAGI HARUO , TAWARA KAZUO , YASUJIMA TOSHUKI , ABE TAKASHI , ENDO TSUNEHIRO , MYASHITA KUNIO , JORAKU FUMIO , TOYOSHIMA HISANORI , KAWAMATA MITSUHISA , ISHII YOSHITARO , SUGA HISAO , HOSOKAWA ATSUSHI
IPC分类号： A47L9/28 , A47L9/04 , A47L9/18 , A47L9/19

30. 发明专利

JP2523930B2 失效
公开(公告)号：JP2523930B2
公开(公告)日：1996-08-14
申请号：JP9766690
申请日：1990-04-16
申请人： HITACHI LTD
发明人： OHARAGI HARUO , TAWARA KAZUO , YASUJIMA TOSHUKI , ABE TAKASHI , ENDO TSUNEHIRO , MYASHITA KUNIO , ISHII YOSHITARO , JORAKU FUMIO , SUGA HISANAKA , HOSOKAWA ATSUSHI , TOYOSHIMA HISANORI , KAWAMATA MITSUHISA
IPC分类号： A47L9/28 , A47L9/19

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