JPH05300692A - Generator and starter of vehicle - Google Patents

Abstract

PURPOSE:To increase a reliability of lubrication by eliminating the early deterioration of lubricating oil of a bearing of a rotary axis and of lubricating oil of a planetary gear. CONSTITUTION:Lubricating oil from an oil pump of an engine is partially branched and is led to oil holes 41a and 41b of a crankshaft 41 to lubricate bearings 18, 30 of a rotary shaft 45 and a planetary gear 22. The oil used for lubrication is made to flow down back to an oil pan of the engine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle power generation / starting device for starting an engine as a starting electric motor and transmitting the rotation of the engine as a generator after starting.

[0002]

2. Description of the Related Art FIG. 2 is a vertical sectional view of a conventional vehicle power generation and starting device. In the figure, 1 is an engine crankshaft, 2 is an engine frame, 3 is a stator, and has an armature core 4 and an armature winding. A bracket 6 is attached to the engine frame 3 with bolts 8 and fixes the armature core 4. Reference numeral 7 is a cover attached to the bracket 6 with bolts 9. A field iron core 10 is provided with a field winding 11, and is attached to the inner end wall of the bracket 6 with a bolt 12. Reference numeral 13 is a rotor, which has magnetic pole cores 14 and 1 of different polarities.
5 and 5 are coupled and fixed by a coupling ring 16 of a non-magnetic metal material, and are movably arranged on the field core 10 and the armature core 4 via an air gap. The magnetic pole cores 14 and 15 are provided with magnetic pole tooth portions 14a and 15a alternately in the circumferential direction. Reference numeral 17 denotes a rotary shaft supported by the field core 10 by a bearing 18, and 19 denotes a flange 17 a of the rotary shaft 17.
Is a holder that is attached to the
The rotor 13 is attached and held by bolts 21 to transmit rotation.

Next, reference numeral 22 denotes a planetary gear unit interposed between the rotary shaft 17 and the crankshaft 1, which is constructed as follows. Reference numeral 23 is a sun gear spline-coupled to the rotary shaft 17, and 24 is a plurality of planet gears meshed with the sun gear 23, each of which is supported by a support pin 25 via a bearing 26. A carrier 27 is attached to the crankshaft 1 with bolts 28, and each support pin 25 is fixed thereto. 29
Is an internal gear fixed to the bracket 6 and revolves the meshed planetary gear 24.

Reference numeral 30 is a bearing for supporting the shaft end of the rotary shaft 17 on the carrier 27, 31 is a thrust bearing, 32 is an oil chamber in which lubricating oil is stored, and 33 and 34 are oil seals.

To start a stopped engine, do the following: An exciting current is passed through the field winding 11 to apply a low-frequency multiphase AC voltage to the armature winding 5. Then,
A magnetic flux is generated in the field core 10, passes through the magnetic pole cores 14 and 15, and is rotated by the rotating magnetic field from the armature core 4.
Rotates, and the rotary shaft 17 rotates integrally with the holding body 19. This rotation is decelerated by the planetary gear device 22 to rotate the crankshaft 1. The rotational angular velocity of the holder 19 is detected by a sensor (not shown), and the frequency of the supplied AC voltage is increased by the AC voltage applying means (not shown) so that the rotation speed is appropriate for starting. Thus, the engine is started.

When the engine is started, the power supply to the armature winding 5 is cut off. The rotation of the crankshaft 1 of the engine is accelerated by the planetary gear device 22, and the rotation shaft 17 is rotated. This rotation drives and rotates the rotor 13 via the holder 19. As a result, a three-phase AC voltage is generated in the electric machine winding 5,
Operates as an alternator.

On the other hand, the rotation of the gears of the crankshaft 1, the rotary shaft 17, and the planetary gear unit 22 causes the lubricating oil in the oil chamber 32 to be absorbed into the bearings 18, 30, the thrust bearing 31, the bearing 26, the sun gear 23, and the planet. Lubricate the teeth of the gear 24.

[0008]

SUMMARY OF THE INVENTION In the conventional vehicle power generation / starting device as described above, lubrication of each bearing and gear is
Since the lubricating oil accumulated in the oil chamber 32 is used, the lubricating oil is deteriorated at an early stage due to the heat generated in the stator 1 and the field portion, and there is a problem that reliability is reduced.

The present invention has been made in order to solve the above problems, and prevents a deterioration of lubricating oil in each bearing and each gear portion of a planetary gear device at an early stage to improve the reliability of lubrication. The purpose is to obtain a power generation and starting device.

[0010]

SUMMARY OF THE INVENTION A vehicle power generation / starting device according to the present invention branches lubricating oil from an oil pump of an engine and introduces it into crank oil to lubricate each bearing and a gear portion of a planetary gear device. It was done like this.

[0011]

According to the present invention, the bearings and the gear portion of the planetary gear device are lubricated by branching the lubricating oil from the oil pump of the engine, so that the lubricating oil is prevented from premature deterioration and is highly reliable. it can.

[0012]

EXAMPLES Example 1. FIG. 1 is a vertical cross-sectional view of a vehicle power generation / starting device according to an embodiment of the present invention.
9, 11-16, 14a, 15a, 18-24, 26-
Reference numerals 31, 33 and 34 are the same as those in FIG. Reference numeral 41 denotes an engine crankshaft. Lubricating oil from an oil pump (not shown) of the engine is branched and supplied from an oil hole 41a at the center of the shaft and a plurality of oil holes 41b on the outer peripheral side as shown by arrows. 42
Is an engine frame and is provided with an oil return hole 42a. Four
Reference numeral 3 is a bracket attached to the engine frame 42 with bolts 8 and provided with an oil return passage 43a and an oil return hole 43b. A field iron core 44 is attached to the bracket 43 with the bolt 12, and has a plurality of oil return holes 44a. Reference numeral 45 denotes a rotary shaft supported by the field core 44 via the bearing 18, and an oil hole 45a at the center of the shaft communicating with the oil hole 41a,
A plurality of radial oil holes 45b communicating with the oil hole 45a
And are provided. The holder 19 is attached to the flange 45c of the rotary shaft 45. FIG. 2 shows a cross-sectional view taken along the line AA of FIG. 1 of the field iron core 44 and the rotating shaft 45 provided with the oil holes.

Returning to FIG. 1, a plurality of support pins 46 fixed to the carrier 27 support the planetary gear 24 via bearings 26. The support pin 46 is provided with an oil hole 46a in the center of the shaft, communicates with the oil hole 41b, and is provided with a plurality of oil holes 46b in the radial direction from the oil hole 46a.

When the engine is started by the operation of the starting motor of the power generator / starter, part of the lubricating oil is introduced into the oil holes 41a and 41b of the crankshaft 41 by the oil pump of the engine. The lubricating oil from the oil hole 41a partially lubricates the bearing 30, and the other part is fed into the oil hole 45a of the rotating shaft 45 and is fed to the oil hole 4a.
The bearing 18 is lubricated via 5b. The oil that has lubricated the bearing 18 is fed from the oil return passage 43a to the oil return hole 4 as shown by the broken line arrow.
After passing through 3b, it flows down through the oil return hole 42a of the engine frame 42 and is returned to the oil pan (not shown) at the bottom of the engine. The oil that has lubricated the bearing 30 flows out as shown by the broken line arrow, partly lubricates the sun gear 23 part, and the other part flows down as it is, and flows back through the oil return hole 42a.

On the other hand, the lubricating oil from the oil hole 41b passes from the oil hole 46a of the support pin 46 through the oil hole 46b, lubricates the bearing 26, and further lubricates the planetary gear 24 portion. Oil that has lubricated this portion flows down and is returned to the oil pan through the oil return hole 42a. The lubricating oil returned to the oil pan is cooled by an external air flow due to traveling, an oil cooler, etc., and is circulated again by an oil pump.

[0016]

As described above, according to the present invention, by using the lubricating oil from the oil pump of the engine and forced circulation,
Since the bearing and the planetary gear unit are lubricated, early deterioration of the lubricating oil is eliminated and the reliability of lubrication is improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a vehicle power generation / starting device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional vehicle power generation / starting device.

[Explanation of symbols]

 3 Stator 4 Armature iron core 5 Armature winding 11 Field winding 13 Rotor 14, 15 Magnetic pole iron core 18, 26, 30 Bearing 19 Holder 22 Planetary gear device 24 Planetary gear 41 Crankshaft 41a, 41b Oil hole 42 Engine frame 42a Oil return hole 43 Bracket 44 Field iron core 45 Rotating shaft 45a, 45b Oil hole 46 Support pin 46a, 46b Oil hole

Claims (1)

[Claims] 1. A bracket attached to an end of an engine frame, a stator having an armature core and an armature winding, fixed to the bracket, and a field fixed to an inner end wall of the bracket. An iron core, a field winding wound around this field iron core, a magnetic pole iron core that is arranged in a space between an inner peripheral portion of the armature iron core and an outer peripheral portion of the field iron core, and forms a rotor, and A rotary shaft, which is supported by the inner diameter portion of the field core through a plurality of bearings, one shaft end of which extends through the inner end wall of the bracket and which is attached to the other shaft end of the rotary shaft. It is interposed between the holder that holds the iron core and one of the ends of the rotary shaft and the end of the crankshaft of the engine.When starting, the drive rotation of the rotary shaft is decelerated and transmitted to the crankshaft to generate power. Is equipped with a planetary gear speed reducer that accelerates the driving rotation of the crankshaft and transmits it to the rotation shaft, During the operation of the engine, the lubricating oil from the oil pump of the engine is guided to the oil hole provided in the crankshaft and fed into the oil hole provided in the rotary shaft to lubricate the bearing of the rotary shaft, and The lubricating oil from the oil hole of the crankshaft is fed into the oil hole provided in the support pin that supports the planetary gear of the planetary gear device via the bearing so as to lubricate each gear and the bearing portion of the planetary gear device. The lubricated oil flows down from the bracket into the engine frame body and returns to the oil pan.