JPH0622384B2 - Vehicle alternator - Google Patents

Vehicle alternator

Info

Publication number
JPH0622384B2
JPH0622384B2 JP57052703A JP5270382A JPH0622384B2 JP H0622384 B2 JPH0622384 B2 JP H0622384B2 JP 57052703 A JP57052703 A JP 57052703A JP 5270382 A JP5270382 A JP 5270382A JP H0622384 B2 JPH0622384 B2 JP H0622384B2
Authority
JP
Japan
Prior art keywords
housing
metal case
rectifier
holding plate
diode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP57052703A
Other languages
Japanese (ja)
Other versions
JPS58172961A (en
Inventor
慶一郎 伴在
向井  拓三
太郎 旭
教正 藤吉
Original Assignee
日本電装株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電装株式会社 filed Critical 日本電装株式会社
Priority to JP57052703A priority Critical patent/JPH0622384B2/en
Publication of JPS58172961A publication Critical patent/JPS58172961A/en
Publication of JPH0622384B2 publication Critical patent/JPH0622384B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/04Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/046Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification in generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14Means for supporting or protecting brushes or brush holders
    • H02K5/141Means for supporting or protecting brushes or brush holders for cooperation with slip-rings

Description

The present invention relates to a vehicle AC generator that is driven by a vehicle engine and that supplies DC power to the in-vehicle electrical load.

Among conventional vehicle AC generators for four-wheeled vehicles, there is a rectifier inside the generator housing. This rectifier has a pellet-shaped diode mounted on a cooling plate that is a heat sink supported in the housing. It was done.

Further, in order to cool the field winding and the stator winding inside the housing and to discharge the hot air, the cooling fan introduces the cooling air through the opening provided in the housing.

Therefore, the surface of the cooling plate, the diode, and the wiring between the diodes are directly exposed to the outside air, and due to the intrusion of muddy water or the water containing salt, electrolytic corrosion occurs and each part corrodes or the current There was a problem of leaking.

In the case of a two-wheeled vehicle generator, only the sealed generator body is installed adjacent to the engine, and the rectifier and voltage regulator are installed in different places. Were connected by wiring. With such a structure, the wiring work is troublesome and the mounting work also requires man-hours. In order to solve this problem, it is conceivable to employ a generator for a two-wheeled vehicle having a structure like the conventional generator for a four-wheeled passenger vehicle as described above.

However, a generator for a two-wheeled vehicle is required to be extremely small and, at the same time, since it is often directly exposed to muddy water, a structure that does not cause a failure due to electrolytic corrosion or dust adhesion is required.

In view of the above problems, the present invention does not impair the function of the rectifier due to muddy water or dust entering through the ventilation window for introducing the cooling air, and the cooling of the plurality of diodes constituting the rectifier is good. It is also an object of the present invention to provide a vehicle AC generator having a rectifier that can be easily mounted.

A first embodiment of the generator of the present invention will be described below with reference to the drawings. 1 to 4, reference numeral 1 denotes a rotating shaft, which is driven by a vehicle engine. 2 is an oil seal, 3
Is a front bearing, 4 is a field core, 5 is a front cooling fan that is welded to the end surface of the field core 4, and discharges the hot air inside, 6 is 0
The ring, 7 is the front housing and is made of aluminum.

Reference numeral 8 is a stator winding, 9 is a claw pole core of a field core, 10 is a field winding, 11 is a stator core, and 12 is a tightening bolt.

Further, 13 is a spigot joint surface of the front housing 7 and the rear housing 14, and 14 is a rear housing in which both end surfaces 14a are round and formed in an egg shape, which is made of aluminum. Reference numeral 15 denotes an intermediate housing (hereinafter referred to as "bearing holding plate") which is attached to the rear housing 14 by screws 16 shown in FIG. 4 to partition the front housing 7 and the rear housing 14 and hold the rear bearing 17.

A brush holder 18 and a brush 19 are in sliding contact with the slip ring 20. Reference numeral 21 is a slip ring cover for covering the slip ring portion. In this case, the bearing holding plate 1
5 has a U-shaped cross section integrally formed with the brush 5, and has a brush introduction opening at the upper end. An elastic body 22 is attached to the rear end of the slip ring cover 21.

23 and 23a are ventilation windows provided in the rear housing 14 in a large number.
It is reinforced with 4.

Reference numeral 25 is a rectifier, inside of which is mounted a diode 26 for three-phase full-wave rectification connected by Gretz connection, and a part of the diode is placed on the bottom 28a of a metal case 28 which serves as a heat sink via an insulating thin layer 27. The other diode is directly attached to the bottom portion 28a of the metal case 28. The terminal lead-out portion of the metal case 28 is sealed with a sealing agent 29 made of synthetic resin. This metal case 28
Is a circular arc-shaped bearing holding plate 1 made of aluminum
It is attached by a screw 16 so as to be in close contact with the flat surface 33 forming the heat transfer part of No. 5, and the heat transfer part is formed at the part where the bearing holding plate 15 is in close contact.

Further, one of the openings 31 for ventilation is formed in a portion of the bearing holding plate 15 facing the rear cooling fan 30 for cooling the stator winding 8 and the like, and the ventilation window 2 of the rear housing 14 is formed.
The wind introduced from 3 flows through the outer periphery of the metal case 28 of the rectifier 25, then reaches the opening 31, passes through the stator winding 8, and is discharged from the outer peripheral ventilation window 23a of the rear housing 14.

Further, a plurality of grooves 32 (FIGS. 1 and 3) that form an air guide portion are formed in the bearing holding plate 15 that is in contact with the metal case bottom portion 28a, and the metal case bottom portion 28 where the wind serves as a heat sink.
It also wraps around the back side of a.

33 is wiring for connecting the stator winding 8 and the rectifier 25,
An insulating bush 34 insulates the wiring 33 from the bearing holding plate 15. Reference numeral 13 is a spigot joint portion, and 7a is a mounting stay integrally formed with the front housing 7.

Next, in FIG. 3, the rotary shaft and the brush are omitted in FIG. 3 for simplification. Reference numeral 40 denotes a voltage regulator, in which a transistor is incorporated in the case to control the current flowing through the field winding 10 and
The electromotive force is controlled to be substantially constant. The voltage regulator 40 is attached to the bearing holding plate 15 with screws 16. Reference numeral 18 is a brush holder, which is a bearing holding plate 15.
It is attached with a screw 41.

Reference numeral 28 denotes a metal case of the rectifier 25, which is attached to the bearing holding plate 15 with screws 16. 42 is an output terminal of the rectifier, 34a is an insulating bush 3 that supports the wiring 33.
4 is a synthetic resin holding plate that is integral with 4.

Reference numerals 31 and 32 are openings provided in the bearing holding plate 15,
In particular, the opening 32 is a groove formed in the bearing holding plate 15 and extends around the back side of the rectifier 25.

Further, the outer peripheral end 15a of the bearing holding plate 15 is shown in FIGS.
As shown in the drawing, the spigot is abutted against the step portion of the rear housing 14 and is connected to the spigot. It should be noted that 15c in FIG. 4 is a spacer, and the screw 16 is fixed to the rear housing 14 by tightening the bearing holding plate 15.

In addition, a groove-shaped brush powder discharge port 50 (FIG. 1) is formed between the rear bearing 17 and the bearing holding plate 15, and the wind from the inside of the slip ring cover 21 is generated by the rotation of the rear cooling fan 30. Brush powder is discharged to the discharge port 50. In addition, this wind is brush holder 1
Slip ring cover 21 passing through a labyrinthine passage inside 8.
It is supposed to enter. Therefore, the brush 19 in the brush holder 18 is also cooled.

The rear cooling fan 30 is a so-called mixed flow fan, and functions as a centrifugal fan that sends air around the rear bearing 17 to the stator winding 8 side and a part of the air passes around the field core 4 and the front cooling fan 5 side. It acts as an axial fan to send to.
Further, the front cooling fan 5 is a centrifugal fan, and the air in this portion is agitated and the ventilation window 7c provided in the front housing 7 is provided.
Hot air is exhausted through the.

Next, FIGS. 5 to 7 showing the second embodiment will be described. In this embodiment, the stay 15d is attached to the bearing holding plate 15.
Are integrally provided, the bearing holding plate 15 and the rear housing 14 are connected by the inlay surface 60, and the bearing holding plate 15 and the front housing 7 are connected by the inlay surface 61.

Further, the bottom 28a of the metal case 28 of the rectifier 25 is in close contact with the flat surface of the bearing holding plate 15, and the groove 32 that partially forms a void in the flat surface of the bearing holding plate 15.
Since the rear cooling fan 30 is rotated, the wind introduced from the ventilation window 23 of the rear housing 14 flows as shown by the arrow and flows in the groove 32, that is, the bottom of the metal case 28 serving as a heat sink. .

The rectifier 25 has an arc shape as shown in FIGS. 7 and 6, and a pellet of the diode 26 is provided inside the rectifier 25, and one diode group is a ceramic sprayed layer 27 which is a thin insulating layer and has a metal case. It is insulated from the bottom portion 28a.

It should be noted that the space 65 around the diode 26 may be filled with an epoxy resin mixed with magnesium powder serving as a synthetic resin, or the space 65 may be filled with cooling oil and sealed. Reference numeral 29 is a sealing material made of synthetic resin, and thus moisture and dust are prevented from entering the metal case 28.

In each of the above embodiments, an AC generator for a vehicle for a motorcycle is given. The reason is that the generator for a motorcycle often suffers from water splashes and mud, and in addition, it is required to be downsized. This is because it is most suitable for the use of the invention. However, the present invention does not limit the application to this type of two-wheeled vehicle.
It may be used for wheeled vehicles. It is especially suitable for four-wheeled vehicles that run on rough roads and coastal areas.

As described above, in the present invention, since the rectifier 25 has the plurality of diodes 26 hermetically sealed in the metal case 28, there is no failure due to dust or muddy water, and since it is one case, the mountability is good, and Even if it is constructed in a small size, there is an effect that the heat dissipation is good by the following measures.

That is, first, the side of the sole metal case 28 from the top to the bottom 28a is cooled by the cooling air generated by the cooling fan 30. Second, the metal case 2
All of the bottoms 28a of 8 are heat sinks for the diodes 26, and cooling air is circulated to a part of the bottoms 28a by the air guide portion 32 provided in the housing 15 to cool the bottoms 28a. Furthermore, this bottom 28
Since the other part of a is in close contact with the heat transfer part 33 of the housing 15, the heat of the bottom part 28a is diffused to the outside through the housing 15.

[Brief description of drawings]

1 is a longitudinal sectional view showing a first embodiment of the generator of the present invention, FIG. 2 is an external view of the generator shown in FIG. 1 seen from the rear, and FIG. 3 is a rear housing of the generator shown in FIG. Fig. 4 is a layout view of a rectifier and the like seen from a rear part by cutting a part of Fig. 4, Fig. 4 is a longitudinal sectional view of the first embodiment shown by cutting at a different angle from Fig. 1, Fig. 5
FIG. 7 is a partial vertical cross-sectional view showing a second embodiment of the present invention, FIG. 6 is a plan layout view of a rectifier seen from the direction of arrow A in FIG. 5, and FIG.
The figure is an enlarged view of the rectifier of FIG. 7, 14, 15 ... Housing, 8 ... Stator winding,
11 ... Stator core, 25 ... Rectifier, 26 ... Diode, 28 ... Metal case, 28a ... Metal case 2
8 bottom part, 30 ... cooling fan, 32 ... housing 1
5 air guide part, 33 ... heat transfer part of the housing 15.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Keiichiro 1-1, Showa-cho, Kariya city, Aichi prefecture, Nihon Denso Co., Ltd. (72) Inventor Taro Asahi 1-1-chome, Showa town, Kariya city, Aichi prefecture Sozo Co., Ltd. (56) Reference Japanese Patent Laid-Open No. 47-8319 (JP, A) Actually developed 50-62005 (JP, U)

Claims (1)

[Claims]
1. A stator core (11) arranged in a metal housing (7, 14, 15), a stator winding (8) wound around the stator core (11), and a plurality of diodes ( 26) and this diode (2
6) The only metal case (2) with which the diode (26) is thermally connected to the bottom (28a) of the case (6).
8), a rectifier (25) for rectifying an AC output generated in the stator winding (8) by the diode (26) into a DC output, and a top portion of the metal case (28) to the bottom portion (28).
and a cooling fan (30) for generating cooling air flowing along the side of the metal case (28) toward the side a), and the housing (15) is generated by the cooling fan (30). An air guide part (32) that guides cooling air to a part of the bottom part (28a) of the metal case (28) and a heat transfer part (33) that is in close contact with the other part of the bottom part (28a) of the metal case (28). ) An alternator for a vehicle, comprising:
JP57052703A 1982-03-31 1982-03-31 Vehicle alternator Expired - Lifetime JPH0622384B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57052703A JPH0622384B2 (en) 1982-03-31 1982-03-31 Vehicle alternator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57052703A JPH0622384B2 (en) 1982-03-31 1982-03-31 Vehicle alternator

Publications (2)

Publication Number Publication Date
JPS58172961A JPS58172961A (en) 1983-10-11
JPH0622384B2 true JPH0622384B2 (en) 1994-03-23

Family

ID=12922245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57052703A Expired - Lifetime JPH0622384B2 (en) 1982-03-31 1982-03-31 Vehicle alternator

Country Status (1)

Country Link
JP (1) JPH0622384B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705228A1 (en) * 1997-02-12 1998-08-13 Bosch Gmbh Robert Electrical machine, preferably a three-phase generator with a rectifier unit
JP3750851B2 (en) * 2002-01-18 2006-03-01 株式会社デンソー AC generator for vehicles
JP4007229B2 (en) 2002-08-30 2007-11-14 株式会社デンソー AC generator for vehicles
JP4797779B2 (en) * 2006-04-27 2011-10-19 株式会社デンソー AC generator for vehicles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062005U (en) * 1973-10-04 1975-06-06

Also Published As

Publication number Publication date
JPS58172961A (en) 1983-10-11

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