JPH07336974A - Alternator - Google Patents

Abstract

PURPOSE:To increase assembly efficiency by making the connection of each diode and a stator coil easy. CONSTITUTION:Heat sinks 18P, 18M are fastened on an outer face of a bracket 35. Connection terminals 76 to which diodes 15P, 16P, 15M, and 16M are connected respectively are laid upon each other outside the heat sinks 18P, 18M. Lead wires which are extended linearly from stator coils 12 pass through ventilation holes 711, 712 of the bracket 35 and are connected to the connection terminals 76 respectively. A synthetic resin cover 51 which is so installed on the bracket 35 as to cover the heat sinks 18P, 18M, has protective cover sections 96 to cover the outside of a connection between each connection terminal 76 and the lead wire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a stator having a stator coil sandwiched between first and second brackets that rotatably support a rotary shaft, and a positive side diode and a negative side diode connected in series to each other. Relates to an alternator in which a plus-side and a minus-side heat sink and a regulator connected to the field coil are fixed to the first bracket.

[0002]

2. Description of the Related Art Conventionally, such an alternator is already known from, for example, Japanese Utility Model Laid-Open No. 3-106868.

[0003]

However, in the above-mentioned conventional one, the plus-side and minus-side heat sinks are
It is fixedly arranged on the inner side of the bracket so as to face each other in a plane orthogonal to the axis of the rotating shaft, and the positive and negative diodes and the stator coil are connected on the inner side of the bracket. However, the connection work was troublesome, and the assembly work efficiency was poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an alternator which facilitates the connection between the plus side and minus side diodes and the stator coil and improves the assembly work efficiency.

[0005]

In order to achieve the above object, the invention according to claim 1 sandwiches a stator having a stator coil between first and second brackets that rotatably support a rotary shaft. , Plus side and minus side heat sinks, which are arranged to face each other with positive side and minus side diodes connected in series at mutually corresponding positions, and a regulator connected to the field coil, are provided in the first bracket. In the fixed alternator, both heat sinks that are facing each other along a plane orthogonal to the axis of the rotating shaft are fixed to the outer surface of the first bracket,
Connection terminals connected to the positive side diode and the negative side diode, which correspond to each other, are stacked on the outer sides of both heat sinks, pass through the ventilation holes provided in the first bracket to allow the cooling air to flow, and form a straight line from the stator coil. A cover made of synthetic resin, which is connected to the connection terminals that overlap each other and covers both heat sinks, and is attached to the first bracket, and a protective cover that covers the outside of the connection portion of each connection terminal and the output wire. It is characterized in that a section is provided.

According to a second aspect of the present invention, in addition to the structure of the first aspect of the present invention, a housing made of synthetic resin for a regulator which is covered with a cover and fixed to the outer surface of the first bracket is provided. , A connection holding portion having a terminal plate on the surface opposite to the first bracket and having an engaging groove extending in the axial direction of the rotating shaft, and drawing out a lead wire connected to the field coil from the field coil The portion is covered with an insulating coating tube except for the tip end thereof, and a lead wire protruding from the coating tube engaged with the engaging groove is connected to the terminal plate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 to 10 show an embodiment of the present invention. FIG. 1 is an electric circuit diagram of an alternator, and FIG.
4 is a vertical sectional view of the alternator taken along line 2-2 of FIG. 4, FIG. 3 is a left side view of FIG. 2, FIG. 4 is a view showing a state in which the cover is removed from FIG. 3, and FIG. 4 is a sectional view taken along line 5-5 of FIG. 4, FIG. 6 is a sectional view taken along line 6-6 of FIG. 4, FIG. 7 is a sectional view taken along line 7-7 of FIG. 4, and FIG. 9 is a sectional view taken along the line, FIG. 9 is an enlarged view of a main part of FIG. 4, and FIG. 10 is a sectional view taken along line 10-10 of FIG.

First, referring to FIG. 1, this alternator 11 is provided.
Is a brushless alternator installed in a car
3 phase generator coil 12_A, 12_B, 12_CConsisting of
A stator 13 having a stator coil 12 and four stator coils
Lath side diode 14_P, 15 _P, 16_P, 17_PIs average
Positive heat sink that can be mounted with row electrical connection
Ku 18_PAnd four negative diodes 14_M, 15
_M, 16_M, 17_MMounted in parallel with electrical connection
Negative heat sink 18_M
And a field coil 19 and a regulator 20.
Of.

The plus side diodes 14 _{P to} 17 _P are connected in parallel to the output terminal 21 via the plus side heat sink 18 _P , and the field coil 19 and the regulator 20 are also connected to the output terminal 21. It Thus, the output terminal 21 of the alternator 11 is connected to the positive side terminal of the battery 23 via the fuse 22. Also, the positive diode 14 _P and the negative diode 14
_The generator coil 12 _A is connected to the connection point of _M , the generation coil 12 _B is connected to the connection point of the positive side diode 15 _P and the negative side diode 15 _M , and the connection point of the positive side diode 16 _P and the negative side diode 16 _M is connected to the connection point. generating coil 12 _C is the connection point of the positive side diodes 17 _P and negative-side diode 17 _M generating coils 12 _a to 12
The connection points of c are connected.

The regulator 20 includes capacitors 24 and 2
5 and 26 are attached IC regulators, and four lead wires 27, 28, 2 connected to the regulator 20 are provided.
Couplers 31 are provided at the ends of 9, 30. The lead wire 27 of the lead wires 29 to 30 is connected to the battery 23 via the charge lamp 32 and the key switch 33.
The lead wire 28 is connected between the charge lamp 32 and the key switch 33.

The structure of such an alternator 11 will be described below. In FIG. 2, the stator 13 has a stator coil 1 on an iron core 34 formed by laminating a plurality of annular iron core plates.
2 is wound, and the stator 13 has a first
And it is sandwiched between the second brackets 35 and 36. Thus, the first and second brackets 35 and 36 are fastened to each other by a plurality of through bolts 37, and the stator 13
Will be sandwiched between the brackets 35 and 36.

Cylindrical boss portions 38 and 39 are coaxially provided at the central portions of the first and second brackets 35 and 36, respectively.
One end of a rotary shaft 40 is rotatably supported by a bearing 41 on the boss portion 38 of the first bracket 35. Thus, the other end of the rotary shaft 40 penetrates the boss portion 39 of the second bracket 36 and projects outward, and a bearing 42 is interposed between the boss portion 39 and the rotary shaft 40.

A claw pole type rotor 43 is fixed to the rotary shaft 40 inside the stator 13 so as to be coaxial with the stator 13, and a cylindrical field iron core 44 is inserted into the rotor 43.
Are fixed to the inner surface side of the first bracket 35 by a plurality of bolts 45. Therefore, the field coil 44 is attached to the field iron core 44.
Is wound.

With respect to the rotor 43, the first bracket 3
A cooling fan 46 is fixed to the rotating shaft 40 on the side opposite to 5, that is, on the outer side of the second bracket 36 in this embodiment. Further, a pulley 47 is fixed to the rotary shaft 40 on the outer side of the cooling fan 46, and an endless belt (not shown) for transmitting power from an engine (not shown) is wound around the pulley 47.

Referring also to FIGS. 3, 4 and 5,
A cover 51 is formed on the first bracket 35 so that a storage chamber 50 is formed between the first bracket 35 and the outer surface of the first bracket 35.
Is attached to each diode 14 _P , 15 _P , 16 _P ,
17 _P ; plus side and minus side heat sinks 18 _P , 1 provided with 14 _M , 15 _M , 16 _M , 17 _M , respectively
The heat sink assembly 52 composed of 8 _M and the regulator 20 is covered with the cover 51 so that the storage chamber 50
Inside, it is attached to the outer surface side of the first bracket 35.

Positive and negative heat sinks 1
8 _P and 18 _M are arc-shaped ones that support one end of the rotary shaft 40 and surround a part of the boss portion 38 provided on the first bracket 35, and are formed of an aluminum alloy plate for weight reduction. To be done. Then the plus side heat sink 1
8 The negative-side heat sink 18 surface opposed to _M of _P, positive-side diode 14 _P to 17 _P are mounted at intervals in the circumferential direction so as to soldering the one end and negative-side heat sink 18 _M The negative side diodes 14 _{M to} 17 _M are attached to the surface facing the positive side heat sink 18 _P at intervals in the circumferential direction such that one ends thereof are soldered. That is, the positive side diodes 14 _{P to} 17 _P are the positive side heat sink 1
It is mounted in a state of being electrically connected in parallel to 8 _P , and the negative side diodes 14 _{M to} 17 _M are mounted in a state of being electrically connected in parallel to the negative side heat sink 18 _M. Moreover, the diodes 14 _P , 14 _M ; 15 _P , 15 _M ; 16 _P , 16 _M , which are connected in series,
17 _P and 17 _M are attached to both heat sinks 18 _P and 18 _M at positions corresponding to each other.

By the way, both heat sinks 18 _P and 18 _M
The diodes 14 _{P to} 17 _P and 14 _{M to} 17 _M are arranged to face each other along the plane orthogonal to the axis of the rotating shaft 40 in a state where the diodes 14 _{P to} 17 _P and 14 _{M to} 17 _M are arranged on the inner side. _{Between P} and 18 _M , as shown in FIG. 6, a plurality of, for example, a pair of spacers 53 made of synthetic resin.
Is installed. The spacer 53 has a cylindrical shape in which fitting portions 55 _P and 55 _M are provided at both ends of a support cylindrical portion 54 that abuts both ends to the heat sinks 18 _P and 18 _{M. The} fitting part 5 is fitted into the fitting holes 56 _P and 56 _M provided corresponding to _P and 18 _M.
5 _P and 55 _M are elastically fitted. Thus, the fitting portions 55 _P and 55 _M are provided with shafts at positions spaced apart in the circumferential direction of the cylindrical portion formed in a taper shape to facilitate fitting into the fitting holes 56 _P and 56 _M. A plurality of slits extending in the direction are provided, and are configured to exert elastic force in the diameter expanding direction when fitted in the fitting holes 56 _P and 56 _M. These fitting parts 55 _P and 55 _M are fitted in the fitting hole 5
6 _P, 56 is intended to fit freely inserted into or removed from _M, together with the disassembly and reassembly of both the heat sink 18 _P, 18 _M is easy, it is possible to use the spacer 53 and again when reassembling . Moreover, both fitting parts 55 _P ,
The axial length of 55 _M is set so as to protrude outward from both the heat sink 18 _P, 18 _M a supporting tube portion 55 being in contact with the opposing surfaces of the heat sink 18 _P, 18 _M .

Referring also to FIG. 7, the regulator 20
The housing 57 made of the synthetic resin of 5 is fitted to the heat sinks 18 _P and 18 _M, and the fitting tubular portion 5 is elastically fitted to the housing 57.
8 _P and 58 _M on both sides with both heat sinks 18 _P and 1
A sandwiching plate 59 sandwiched between 8 _M is provided so as to project laterally. The fitting cylinders 58 _P and 58 _M are fitted in fitting holes 60 _P and 60 _M provided in the heat sinks 18 _P and 18 _M , respectively.
The axial length of the fitting cylindrical portion 58 _P, 58 _M is set to the holding plate 59 from both the heat sink 18 _P, 18 _M in a state sandwiched between the heat sink 18 _P, 18 _M so as to protrude outward ing.

In this way, the fitting of the pair of spacers 53 is performed.
Joint part 55_P, 55_MThe fitting hole 56_P, 56_MTo each
The spacer 53 is interposed between the members by elastically fitting them.
Both heat sinks mounted 18_P, 18_MThe opposite posture is maintained
Both heat sinks 18 in that state_P, 18_Mwhile
And the fitting cylinder 58_P, 58_MThe fitting hole 60_P, 60_MTo
By sandwiching the sandwiching plate 59 so as to fit each other,
Diode 14_P, 15 _P, 16_P, 17_P; 14_M，
15_M, 16_M, 17_MWith positive side and
And minus side heat sink 18_P, 18_MAnd regular
And a heat sink assembly 52 including
Will be.

The heat sink assembly 52 is grounded.
To obtain an electrically connected state with the first bracket 35
The negative side heat sink on the outer surface of the first bracket 35
18 _MFixed to the first bracket 35 with the
To be done. That is, each spacer 53 of the first bracket 35
At the position corresponding to, as shown in Figure 6,
Tooth Sync 18_MFitting part 55 protruding from_MMating
Fitting recess 61 and coaxially connecting to the fitting recess 61
Screw holes 62 are provided respectively, and the first bracket 35
As shown in FIG. 7, at a position corresponding to the holding plate 59 of
Minus side heat sink 18_MFitting tube part 5 protruding from
8_MFitting recess 61 for fitting with each other, and the fitting recess 6
1 is provided with a screw hole 62 coaxially connected. Also regulation
The housing 57 of the vibrator 20 includes the first bracket 35.
A connecting plate 64 having a cylindrical protrusion 63 protruding to the side
The first bracket
The cylindrical projection 63 is provided at a position corresponding to the connecting plate 64 of the belt 35.
To the fitting recess 61, and the fitting recess 61
A screw hole 62 that extends coaxially is provided. Therefore, each space
The pair of screw members 65 that are respectively inserted into the
1 bracket 35 is screwed into the screw holes 62,
Both fitting cylinders 58 are passed through the holding plate 59._P, 58 _MInserted in
The screw member 65 is screwed into the corresponding screw hole 62,
Screw member 66 inserted in plywood 64 and tubular protrusion 63
Are screwed into the corresponding screw holes 62. Moreover, each spacer
Fitting portion 55 in 53_PAnd fitting tube 58_PThe
Lath side heat sink 18_PIs the synthetic resin
Surrounded by ring-shaped insulating washers 67
Head 65a of each screw member 65 and each insulating washer 67.
With metal washers 68 interposed between
In this state, each screw member 65 is tightened. In addition, the screw member 6
6 is a washer 6 between the head 66a and the connecting plate 64.
It is tightened with 8 interposed.

With particular attention to FIG. 4, the first bracket 35
At the plus side heat sink 18_PAnd minus
Side heat sink 18_MAt the position corresponding to the outer peripheral edge of
Diode 15_P, 15_M; 17_P, 17_MArrangement part of
Ventilation holes 71 formed in an arc shape corresponding to₁And the dio
16_P, 16_MFormed in an arc shape corresponding to the part where
Ventilation holes 71₂And the diode 14_P, 14_MDistribution of
Ventilation hole 71 formed in an arc shape corresponding to the installed portion₃When,
Positive and negative heat sink 18_P, 18_M
A plurality of ventilation holes 7 arranged in a portion other than the arrangement position of the
1_Four, 71_Five, 71 ₆, 71₇And are provided. Again
2 bracket 36, as shown in FIG.
Holes 72 ... Are provided.

Both heat sinks 18 _P , 1 facing each other
Of the 8 _M, the heat sink arranged on the cover 51 side, that is, the plus side heat sink 18 _P has a plurality of rectangular cooling air circulation holes 73 ... And each cooling air circulation hole 73 ... As shown in FIG. A plurality of fins 74, which are respectively connected to the edges and extend to the inner side, that is, the negative side heat sink 18 _M side, are formed by cutting and raising.

By the way, the minus side heat sink 18_M
Has a ventilation hole 17 at its outer peripheral edge.₁~ 17₃Corresponding to the inner peripheral edge of
The heat sink on the plus side, whereas the
18 _PHas a ventilation hole 17 at its outer peripheral edge.₁~ 17₃Inner edge of
It is formed so as to be located on the outer side than
Each diode 14_P, 15_P, 16_P, 17_P; 1
Four _M, 15_M, 16_M, 17_MPlus in the part corresponding to
Side heat sink 18_PSemicircular notch 7 on the outer peripheral edge of
5 (see FIG. 4) are provided.

Moreover, each diode 14_P, 14_M; 15
_P, 15_M; 16_P, 16_M; 17 _P, 17_MConnected to
Both heat sink 18_P, 18_MExtended to the outer side of
The connecting terminals 76 ...
Connection terminals 76 corresponding to each other ...
Are arranged. Ie 14_P, 14_MConnection terminal 7
6 ..., diode 15_P, 15_MConnection terminal 76 ...
Iodo 16_P, 16 _MConnection terminal 76 of
Iodo 17_P, 17_MThe connection terminals 76 of ... are notches 7
The parts corresponding to 5 ... are arranged so as to overlap vertically.
It However, the diode 14_P, 14_MConnection terminal 76 ...
Is connected to the connection terminal 77 extending from the regulator 20.
It is arranged so as to be sandwiched between them.

On the other hand, each generator coil of the stator coil 12
12_A, 12_B, 12_C(See Fig. 1)
Provided to the connection terminals 76 ... 77 and the regulator 29.
The lead wire 78 ... Which should be connected to the connection terminal 79
It extends straight. That is, the magneto coil 12_BIn a row
A pair of lead wires 78 ...₁Penetrating through
Iodo 15_P, 15_MStraight to the connection terminal 76 ...
Is extended to the generator coil 12_A~ 12_CConnected to the connection point of
The single lead wire 78 is a ventilation hole 71.₁Penetrating through the dio
Code 17_P, 17_MExtending straight to the connection terminals 76 ...
Is installed, the power generation coil 12_A~ 12_CConnected to the connection point of
The first lead line 78 is the ventilation hole 71._FourPenetrate through the regular
Straight to the connection terminal 79 of the power generator 20
IL 12 _BA pair of lead wires 78 ...
₂Through the diode 16_P, 16_MConnection terminal 76
It extends in a straight line up to ..._AConnected to
The pair of lead wires 78 ... Are the ventilation holes 71.₃Penetrating through the dio
Card 14_P, 14_MAnd the connection end of the regulator 20
It extends in a straight line up to the child 77. And each lead line
78 ... Solder to the corresponding connection terminals 76 ..., 77, 79.
Attached.

In FIG. 9 and FIG. 10, the housing 57 of the regulator 20 has a pair of connection holding portions 80 and 81 which extend toward the boss portion 38 side of the first bracket 35.
Are provided, and engaging grooves 82, 83 extending parallel to the axis of the rotating shaft 40 are provided in the portions of the connection holding portions 80, 81 on the boss portion 38 side. The connection holding unit 8
On the side opposite to the first part 35 of 0, 81, that is, on the surface of the cover 51 side, conductive parts 84, 85 in which a conductive metal plate is embedded so as to expose the surface are extended in the regulator 20. Terminal plates 86 and 87, which are provided integrally with the conductive portions 84 and 85, are erected adjacent to the engaging grooves 82 and 83.

On the other hand, the boss portion 38 has the connection holding portion 8
The notch grooves 88 and 89 are provided corresponding to 0 and 81, and the pair of lead wires 90 and 91 which are continuous with the field coil 19 and penetrate the field core 44 are located at the position where the regulator 20 is arranged. Ventilation hole 71 provided in 1 bracket 35
_It is pulled out from ₄ into the notch grooves 88, 89. Moreover, the lead-out portions of the lead wires 90 and 91 from the field coil 19 are covered with an insulating coating tube 92 except for the tip portion thereof.
2 is engaged with the engagement grooves 82 and 83, respectively. Thus, the projecting portions of both the lead wires 90 and 91 from the covering tube 92 are soldered while being wound around the terminal plates 86 and 87, respectively.

By the way, both heat sinks 18 _P and 18 _M
The cover 51 that covers the regulator 20 is made of synthetic resin and has a dish shape. On the other hand, at the position adjacent to the boss portion 38, a cylindrical mounting having a step portion 93a abutting against the inner surface of the cover 51 and a small diameter tubular portion 93b protruding from the step portion 93a on the tip side is attached to the first bracket 38. Boss 93
Is projected. Thus, the small-diameter cylindrical portion 93b penetrates the cover 51 whose inner surface is brought into contact with the stepped portion 93a so that the front end surface faces outward, and is grounded between the small-diameter cylindrical portion 93b and the front end. A screw member 94 having a head portion 94a sandwiching the terminal 95a is screwed into the mounting boss portion 93. Thus, the ground wire 95 is connected to the ground terminal 95a,
The bracket 35 is grounded via the screw member 94, the ground terminal 95a, and the ground wire 95.

On the cover 51, the connection terminals 76 ...
The plurality of protective cover portions 96, which are located on the outer side of the connecting portions between the lead wires 77, 79 and the lead wires 78, for avoiding the contact of the connecting portions with the first bracket 35, are provided. It extends toward the bracket 35 and is integrally provided. Moreover, some tips of the protective cover portions 96 ...
Locking portion 97 provided at the outer edge of the first bracket 35 ...
Engaging claws 98 that are elastically engaged with are respectively provided.

Further, the cover 51 is provided with a plurality of cooling air introducing holes 99 ... And a plurality of baffle plate portions 100 ... Continually connected to the edges of the cooling air introducing holes 99. .

The insulating member 101 and the grommet 102 are sandwiched between the cover 51 and the first bracket 35, and the output terminal 20 connected to the plus side heat sink 18 _P penetrates the insulating member 101 and projects outward. To be done. Also, the four lead wires 2 connected to the regulator 20
7 to 30 penetrate the grommet 102 and are drawn to the outside.

Next, the operation of this embodiment will be described.
And rotation of the rotary shaft 40 due to transmission of driving force from the engine
When the cooling fan 46 is activated by the operation, the cover 51
The cooling air introduced into the storage chamber 50 through the cooling air introduction holes 99 ...
The air to be removed is the ventilation holes 71 of the first bracket 35.₁~ 71
₇From the side of the rotor 43 to the passage of the second bracket 36.
It will flow from the air holes 72 to the outside. At this time, storage
In the chamber 50, each diode 14_P~ 17_P, 14
_M~ 17_MThe plus side in the opposite position with the inside
And minus side heat sink 18_P, 18_MIs the first
In an arc shape surrounding a part of the boss portion 38 of the bracket 35
And is fixed to the outer surface of the first bracket 35.
The bracket 35 has a positive side heat and a negative side heat.
Sink 18 _P, 18_MVentilation holes 71 corresponding to the outer peripheral edge of the
₁~ 71₃Is provided. Therefore, in the storage room 50
The cooling air introduced into the
Heat sink 18_P, 18_MInflow from the inner peripheral side
The ventilation holes 71 from the outer peripheral side.₁~ 71₃Distribute to
Like Also, both heat sinks 18_P, 18_MOut of
Positive side heat sink 18 arranged on the cover 51 side_P
Is provided with a plurality of cooling air circulation holes 73 ...
Then, both heat sinks 18_P, 18_MDirecting cooling air between
Entry is promoted. Therefore, both heat sinks 18_P，
18_MMake sure that the cooling air flows efficiently between the
Tooth Sync 18_P, 18_MCan improve the cooling efficiency of
it can.

Moreover, the plus side heat sink 18 _P has
A plurality of fins 74, which extend inward and are respectively connected to the edges of the cooling air circulation holes 73, respectively, are provided in the cooling air circulation holes 7.
Since it is cut and raised together with 3, the surface area can be increased without reducing the heat mass of the plus-side heat sink 18 _P , despite the plurality of cooling air circulation holes 73. As a result, the cooling efficiency can be further improved, and it is not necessary to join other components such as the radiation fins.

In addition, plus and minus heat sinks
Ku 18_P, 18_MThe spacer 53 interposed between the both ends
Both heat sinks 18_P, 18_MSupport cylinder
Both heat sinks 18 at both ends of 54_P, 18_MTo each
Fitting part 55 for elastic fitting_P, 55_MA circle made up of
It has a cylindrical shape, and the spacer 53 is interposed between them.
As a result, both heat sinks 18_P, 18_MIs the opposite
It will be temporarily assembled with the posture maintained. See you again
Both heat sinks 18_P, 18_MTo
Fitting cylinder part 58 to be fitted_P, 58_MHave on both sides
Tooth Sync 18 _P, 18_MA sandwiching plate 59 sandwiched between is installed.
Both heat sinks 18 which are in a temporary assembled state_P，
18_MIn the meantime, the fitting tubular portion 58_P, 58_MThe corresponding heat
Sink 18_P, 18_MAnd the holding plate 59
By sandwiching both heat sinks 18_P, 18_M
And the regulator 20 form the heat sink assembly 52.
Is made. Moreover, the screw part inserted into each spacer 53
Both fitting cylinder parts 58 are penetrated through the material 65 and the sandwiching plate 59.
_P, 58_MThe screw member 65 inserted into the first bracket is the first bracket.
Both heat sinks 18 since they are screwed to 35_P, 18_M
And regulator 20 to the first bracket 35 at once
It can be assembled and can improve the assembly work efficiency.
It

Further, fixed to the outer surface of the first bracket 35.
Both heatsinks 18_P, 18 _MAt each other
Corresponding plus and minus diodes 14_P~
17 _P, 14_M~ 17_MConnection terminals 76 connected to each
… Both heat sinks 18_P, 18_MLayered on the outside of
The ventilation hole 71 of the first bracket 35.₁, 71₂, 71
₃Extending straight from the stator coil 12 through
Each lead wire 78 ... Is connected to the mutually overlapping connection terminals 76 ...
Each diode 14_P~ 17_P, 14_M~
17_MAnd the lead wires 78 ...
It can be done very easily on the outer side of 35,
It can contribute to the improvement of business efficiency. And both heats
Sink 18_P, 18_MCover the first bracket 35
Each connecting terminal 7 is attached to the cover 51 made of synthetic resin.
6 and protection for covering the outer side of the connecting portion of the lead wire 78.
Since the cover portion 96 ... Is provided,
1 The contact with the bracket 35 can be surely avoided.
It

The lead wire 9 connected to the field coil 19
The leading portions of the field coils 0 and 91 from the field coil 19 are respectively covered with an insulating coating tube 92 except for the tip portion thereof, and the housing 57 of the regulator 20 has an engaging groove for engaging the coating tube 92. Connection holding portions 80 and 81 having 82 and 83 are provided, and the protruding portions of the lead wires 90 and 91 from the respective covering tubes 92 are connected and held.
0, 81 are connected to the terminal plates 86, 87, so that the lead wires 90, 91 are surely prevented from coming into contact with the surrounding conductive member, that is, the first bracket 35, and are connected to the regulator 20. A reliable electrical connection state can be obtained.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

For example, the cooling fan 46 may be fixed to the rotary shaft 40 on the inner side of the second bracket 36,
The present invention can also be applied to an alternator having a brush and a slip ring, and the heat sink may be formed of a copper plate.

[0040]

As described above, according to the first aspect of the present invention, both heat sinks that are facing each other along the plane orthogonal to the axis of the rotating shaft are fixed to the outer surface of the first bracket,
Connection terminals connected to the positive side diode and the negative side diode, which correspond to each other, are stacked on the outer sides of both heat sinks, pass through the ventilation holes provided in the first bracket to allow the cooling air to flow, and form a straight line from the stator coil. A cover made of synthetic resin, which is connected to the connection terminals that overlap each other and covers both heat sinks, and is attached to the first bracket, and a protective cover that covers the outside of the connection portion of each connection terminal and the output wire. Since the portion is provided, the connection between each diode and each lead wire can be made extremely easily on the outer side of the first bracket, and the assembly work efficiency can be improved, and each connection terminal and By covering the outer side of the connection portion of the lead wire with the protective cover portion, contact of the connection portion with the first bracket can be surely avoided. Can.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the housing made of synthetic resin for the regulator which is covered with the cover and fixed to the outer surface of the first bracket is not provided. , A connection holding portion having a terminal plate on the surface opposite to the first bracket and having an engaging groove extending in the axial direction of the rotating shaft, and drawing out a lead wire connected to the field coil from the field coil The part is covered with an insulating covering tube except for the tip part, and the lead wire protruding from the covering tube engaged with the engaging groove is connected to the terminal plate, so that it contacts the surrounding conductive member. It is possible to obtain a reliable electrical connection state between the lead wire from the field coil and the regulator while surely avoiding this.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of an alternator.

FIG. 2 is a vertical cross-sectional view of the alternator taken along line 2-2 of FIG.
It is sectional drawing which follows the line.

FIG. 3 is a left side view of FIG.

FIG. 4 is a diagram showing a state in which a cover is removed from FIG.

5 is a sectional view taken along line 5-5 of FIG.

6 is a cross-sectional view taken along line 6-6 of FIG.

7 is a cross-sectional view taken along line 7-7 of FIG.

8 is a sectional view taken along line 8-8 of FIG.

9 is an enlarged view of a main part of FIG.

10 is a sectional view taken along the line 10-10 of FIG.

[Explanation of symbols]

11 ... Alternator 12 ... Stator coil 13 ... Stator 14 _{P to} 17 _P ... Positive side diode 14 _{M to} 17 _M ... Negative side diode 18 _P ... Positive side heat sink 18 _M ... -Minus side heat sink 19 ... Field coil 20 ... Regulator 35 ... First bracket 36 ... Second bracket 40 ... Rotary shaft 51 ... Cover 57 ... Housing 71 _{1 to} 71 ₃ ... Ventilation hole 76 ... Connection terminal 78, 90, 91 ... Lead wire 80, 81 ... Connection holding part 82, 83 ... Engagement groove 86, 87 ... Terminal plate 92. ..Coating tube 96 ... Protective cover

Claims (2)

[Claims] 1. A stator (13) having a stator coil (12) is sandwiched between first and second brackets (35, 36) rotatably supporting a rotating shaft (40),
Positive side and negative side heat sinks (18 _P , 18) which are arranged facing each other with positive side and negative side diodes (14 _{P to} 17 _P , 14 _{M to} 17 _M ) connected in series at positions corresponding to each other. _M ) and the regulator (20) connected to the field coil (19) are opposed to each other along a plane orthogonal to the axis of the rotation shaft (40) in the alternator fixed to the first bracket (35). The two heat sinks (18 _P , 18 _M ) existing at are fixed to the outer surface of the first bracket (35), and the positive side and negative side diodes (14 _{P to} 17 _P , corresponding to each other) are fixed.
Connection terminals (76) connected to 14 _{M to} 17 _M respectively
Are stacked on the outer sides of both heat sinks (18 _P , 18 _M ), and the first bracket (3
5) provided with ventilation holes (71 ₁ to 71 ₃₎ each lead wire extending in a straight line from the through to the stator coil (12) to (78) is connected to the connection terminals overlapping each other (76), both Each connection terminal (76) and the lead wire (7) are attached to a synthetic resin cover (51) that covers the heat sinks (18 _P , 18 _M ) and is attached to the first bracket (35).
8) An alternator, which is provided with a protective cover portion (96) for covering the outer side of the connection portion. 2. The housing (57) made of synthetic resin for the regulator (20) which is covered with the cover (51) and fixed to the outer surface of the first bracket (35) is opposite to the first bracket (35). The connection holding portion (80, 81) having the terminal plate (86, 87) on the end side surface and the engaging groove (82, 83) extending in the axial direction of the rotating shaft (40) is provided, and the field coil is provided. Lead line (9)
(0, 91) of the field coil (19) drawn out from the field coil (19) is covered with an insulating coating tube (92) excluding its tip, and is engaged with the engagement grooves (82, 83). 2. The alternator according to claim 1, wherein a lead wire (90, 91) protruding from the tube (92) is connected to the terminal plate (86, 87).