JPH0216363A - Starting charger device for engine - Google Patents

Abstract

PURPOSE:To prevent an air gap from changing with a rotary field pole member inhibited from its surface deflection by forming a pair of tapered surfaces in an opposed part of the rotary field pole member facing to a field core and providing a roller bearing to be arranged between the tapered surfaces. CONSTITUTION:A principal part of a device is constituted of a rotary field pole member (rotor) 24 rotating integrally with a crankshaft, stator coil 42 and a field core 34, and air gaps 46, 48, 49 are formed respectively between these rotor, coil and core. Here a pair of tapered surfaces 56, 58, respectively tilting for the crankshaft, are formed in a point end part 50 of a rotary field pole 26, formed in the peripheral part of the rotary field pole member 24, and an opposed part 52, facing to the point and part 50, of the field core 34. While a roller bearing 54 is arranged between each tapered surface 56, 58. The rotary field pole member 24 is rotatably supported in axial and radial directions through the roller bearing 54 for the field core 34.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an engine starting/charging device.

"Conventional technology" The engine starting/charging device uses a starter motor (starter motor).
An example of such an engine starting/charging device is disclosed in Japanese Patent Publication No. 61-54949. Hereinafter, the starter charging device of this publication will be explained with reference to FIG.

In FIG. 1, the engine crankshaft 1 includes:
Rotating field pole member (rotor) that also serves as a flywheel 2
is attached to rotate integrally with the crankshaft 1. A field core 3 is fixed to the engine body inside the rotating field pole member 2 and close to the rotating field pole member 2, and a field coil 4 is wound around the field core 3. Further, a stator core 5 is fixed to the engine body outside the rotating field pole member 2 in close proximity to the rotating field pole member 2, and a stator coil 6 is wound around the stator core 5.

When both the field coil 4 and the stator coil 6 are excited to generate magnetic flux, the rotating field pole member 2 can be rotated at high speed, which is used at the time of starting or acceleration. Further, if only the field coil 4 is excited to generate magnetic flux and the rotation of the rotating field pole member 2 generates a current in the stator coil 6, the rotating field pole member 2 can be rotated at a low speed. is used during deceleration. In this way, the rotating field pole member 2 can be accelerated or decelerated by controlling the energization to the field coil 4 and the stator coil 6, and therefore, torque fluctuations can be smoothly controlled.

In the starting charger, the rotating field pole member 2 rotates with respect to the field core 3 and the stator core 5, so that between the rotating field pole member 2 and the field core 3, and
It is necessary to provide a gap, that is, an air gap, between the rotating field pole member 2 and the stator core 5. Therefore, two minute air gaps 7.8 are formed between the rotating field pole member 2 and the field core 3, through which the magnetic flux can pass.
A magnetic flux path 9 is ensured between the rotating field pole member 2 and the field core 3. Furthermore, one minute air gap lO through which magnetic flux can pass is formed between the rotating field pole member 2 and the stator core 5, and a magnetic flux passage is ensured between the rotating field pole member 2 and the stator core 5. It looks like this.

"Problem to be Solved by the Invention" The air gap 7.8.10 described above is preferably as small as possible in order to create a strong magnetic flux. That is, if the air gap 7.8.10 is large, a sufficient magnetic flux path will not be ensured, so that the starter-charging device will not work properly or will become inoperable. In addition, the second
The figure shows the relationship between the air gap and the performance of the starter charging device, and it is understood that as the air gap increases, the performance of the starter charging device decreases.

On the other hand, if the air gap 7.8.10 is made too small, surface runout of the rotating field pole member 2 may occur between the rotating field pole member 2 and the field core 3, or between the rotating field pole member 2 and the stator core 5. In between, the two come into contact. That is, since the crankshaft 1 to which the rotating field pole member 2 is attached is only pivotally supported by the main bearing of the engine body, the crankshaft 1
Because of its low rotational support rigidity, it tends to vibrate during engine operation, and when the crankshaft 1 vibrates, the rotating field pole member 2 causes surface runout. In such a case, a predetermined clearance is not secured between the rotating field pole member 2 and the field core 3 or between the rotating field pole member 2 and the stator core 5,
The two come into contact, and rotation of the rotating field pole member 2 is prevented.

It is an object of the present invention to prevent surface runout of the rotating field pole member to prevent fluctuations in the air gap during engine operation, and further to set the air gap between the rotating field pole member and the field core to be smaller. An object of the present invention is to provide an engine starting/charging device capable of generating strong magnetic flux.

``Means for Solving the Problem'' The present invention provides a rotating field pole member that is attached to the crankshaft of an engine and rotates integrally with the crankshaft, and a rotating field pole member that is fixed to the engine body side in proximity to the rotating field pole member. a field core having a field coil, and a stator core having a stator coil and being fixed to the engine body side in proximity to the rotating field pole member, and between the rotating field pole member and the stator core,
In an engine starting/charging device in which a minute air gap is formed through which a magnetic flux can pass, a tip end of the rotating field pole member and an opposing portion of a field core facing the tip end are opposite to each other and are attached to the crankshaft. A pair of tapered surfaces are formed that are inclined with respect to the shaft, and a roller bearing is disposed between the tapered surface at the tip of the rotating field pole member and the tapered surface at the opposing portion of the field core. Features.

"Function" In the present invention, a pair of tapered surfaces that face each other and are inclined with respect to the crankshaft are formed at the tip of the rotating field pole member and the opposing portion of the field core that opposes the tip. There is a gap between the tapered surface of the tip of the rotating field pole member and the tapered surface of the opposing portion of the field core.
Since the roller bearing is arranged, the rotating field pole member is reliably supported in the axial direction and the radial direction so as to be freely rotatable with respect to the field core via the roller bearing. In this way, the rotating field pole member is reliably supported rotatably in the axial and radial directions relative to the field core via the roller bearing, so surface runout of the rotating field pole member is prevented, and the crankshaft Even if the field core vibrates, the air gap between the rotating field pole member and the field core is prevented from fluctuating. Furthermore, surface runout of the rotating field pole member is prevented, and fluctuations in the air gap between the rotating field pole member and the field core are prevented.
The air gap can be set smaller and therefore a stronger magnetic flux can be created.

"Embodiments" Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 3 shows an engine starting/charging device according to an embodiment of the present invention.

In FIG. 3, a rotating field pole member (rotor) 24, which is a drive plate, is attached to the crankshaft 20 of the engine via a disk 22, and the rotating field pole member 24 is integrated with the crankshaft 20. It is designed to rotate.

A rotating field pole 26 is formed on the outer periphery of the rotating field pole member 24. This rotating field pole 26 includes a first pole core 28 having a large number of claws formed at equal intervals along the circumference, and a number of claws opposite to the claws that are the same in number as the claws of the first pole core 28. A second pole core 30 having a portion
and a non-magnetic ring 32 that connects both pole cores 28 and 30, and the claw portions of the first ball core 28 and the claw portions of the second pole core 30 are arranged alternately along the circumferential direction. And they are arranged at intervals.

A field core 34 is fixed to the engine body inside the rotating field pole 26 and close to the rotating field pole 26.
is wound. That is, the field core 34 is
The field core 34 is fixed to the cylinder block 38 of the engine, and the rotating field pole member 240 has a concave portion 40.
are placed at intervals. Furthermore, the rotating field pole 26
A stator core 42 is fixed to the engine body outside the rotating field pole 26 and close to the rotating field pole 26.
A stator coil 44 is wound around 2. That is, the stator core 42 is fixed to the cylinder block 38 of the engine and is spaced apart from the rotating field poles 26.

Then, the field coil 36 and the stator coil 44
When both are excited to generate magnetic flux, the rotating field pole member 24 can be rotated at high speed, and this is used when starting up or increasing the torque during acceleration. Further, if only the field coil 36 is excited to generate magnetic flux and the rotation of the rotating field pole member 24 generates a current in the stator coil 44, the rotating field pole member 24 can be rotated at a low speed. , used during deceleration.

In this way, the rotating field pole member 24 can be accelerated or decelerated by controlling the energization to the field coil 36 and the stator coil 44, and therefore, torque fluctuation can be smoothly controlled.

In the starting charger described above, since the rotating field pole member 24 rotates with respect to the field core 34 and the stator core 42, an air gap 46 is provided between the rotating field pole 26 and the stator core 42, and the rotating field magnetic pole 26
Two air gaps 48, 49 are provided between the field core 34 and the field core 34. And the rotating field pole 24
A pair of tapered surfaces that face each other and are inclined with respect to the crankshaft 20 are formed on the tip 50 and the opposing portion 52 of the field core 34 that opposes the tip 50. A roller bearing 54 is disposed between the tapered surface of the opposing portion 52 and the tapered surface of the opposing portion 52 .

Therefore, the rotating field pole member 24 is reliably supported rotatably in the axial and radial directions with respect to the field core 34 via the roller bearing 54.

Furthermore, between the rotating field poles 26 and the stator core 42,
A magnetic flux path is secured through the air gap 46, and between the rotating field pole 26 and the field core 34,
A magnetic flux path is ensured via the air gaps 48, 49. The rotating field pole member 24 is reliably supported rotatably in the axial and radial directions with respect to the field core 34 via a roller bearing 54, and an air gap 48 between the rotating field pole 26 and the field core 34 is provided. Since .49 can be reliably maintained at a predetermined spacing, the air gap 48,49 can be made small and therefore a strong magnetic flux path can be obtained.

Next, FIG. 4 shows the main part of FIG. 3 above.

In FIG. 4, an air gap 46 is provided between the rotating field poles 26 and the stator core 42, and two air gaps 48 and 49 are provided between the rotating field poles 26 and the field core 34. It is being Rotating field pole 26
between the tip 50 of the field core 34 and the opposing portion 52 of the field core 34 facing the tip 50, the tip 50 and the opposing portion 52 each have a pair of grooves that face each other and are inclined with respect to the crankshaft 20. Tapered surface of 56.58
is formed, and the tapered surface 56 of the distal end portion 50 and the opposing portion 52
A roller bearing 54 is disposed between the tapered surface 58 and the tapered surface 58 .

FIG. 5 shows the configuration of the roller bearing 54, and FIG. 6 shows a VI-VI cross section in FIG. 5.

In FIG. 5.6, the roller bearing 54 includes an annular plate member 60, and the plate member 60 has a plurality of rectangular holes 62 formed at predetermined intervals in the circumferential direction. A roller 64 is rotatably disposed in each of these rectangular holes 62, so that the rotation of the roller 64 causes the tapered surface 56 of the distal end portion 50 to rotate relative to the tapered surface 58 of the opposing portion 52. be able to.

Therefore, since the roller bearing 54 is disposed between the tip 50 and the opposing portion 52, the tip 50 of the rotating field pole member 240 and the rotating field pole 26 can rotate relative to the field core 34. . Furthermore, an air gap 46 is formed between the rotating field poles 26 and the stator core 42.
A magnetic flux path is secured through the rotating field pole 2.
6 and the field core 34, an air gap 48
．． 49, the magnetic flux path M1 is secured. Since the rotating field pole member 24 is reliably supported rotatably in the axial and radial directions with respect to the field core 34 via the roller bearing 54, the rotating field pole member 24
Air gap 48.4 between 6 and field core 34
9 can be made small and therefore a strong magnetic flux path M
1 can be obtained.

As described above, the tapered surfaces 56.58 are formed on the tip portion 50 and the opposing portion 52, and the roller bearing 54 is disposed between the tapered surfaces 56.58, so that the rotating field pole member 24 is reliably rotatably supported by the roller bearing 54 with respect to the field core 34 in the axial and radial directions. In this way, the rotating field pole member 24 is reliably supported rotatably in the axial and radial directions with respect to the field core 34 via the roller bearing 54, so that surface runout of the rotating field pole member 24 is prevented and the engine Even if the crankshaft 20 vibrates during operation, the rotating field pole member 24 and field core 34
Fluctuations in the air gap 48,49 between the two are prevented.

Furthermore, since surface runout of the rotating field pole member 24 is prevented and fluctuation of the air gap 48.49 between the rotating field pole member 24 and the field core 34 is prevented, the air gap 48.49 can be set smaller. Therefore, a strong magnetic flux path M1 can be obtained.

Note that in the above configuration, the roller 64 of the roller bearing 54 may be an insulator or a conductor.

As shown in FIG. 7, when the roller 64 is made of a conductive material, the tip 50 of the rotating field pole 26 of the rotating field pole member 24 is opposed to the opposing portion 52 of the field core 34. It becomes conductive. Therefore, since the magnetic flux path M2 is formed through the conductive roller 64,
One air gap 49 between the tip 50 and the field core 34 does not contribute to the formation of a magnetic flux path.

Therefore, there is no need to reduce the air gap 49,
Since the air gap 49 may be large, the processing accuracy of the air gap 49 is not required.

Further, in the above configuration, an air gap 46 between the rotating field poles 26 and the stator core 42 and an air gap 48 between the rotating field poles 26 and the field core 34 are provided.
．． Since the air gap 49 is set parallel to the crankshaft 20, it is easier to set the air gap compared to the case where the air gap is set in the radial direction of the crankshaft 20.

Further, in the above configuration, the tapered surface 58 of the opposing portion 52 of the field core 34 is formed on an inner ring 66 disposed around the outer periphery of the field core 34, and the inner ring 66 is formed on the cylinder block 38 of the engine.
Although attached to the engine, the inner ring 66 may be integrally formed with the cylinder block 38 of the engine.

In FIG. 3, a torque converter device 68 is disposed on the opposite side of the rotating field pole member 24 from the engine body, and this torque converter device 68 fluidly couples the crankshaft 20 and the drive shaft 70. ing.

Next, in FIG. 3, the present invention is applied to an engine equipped with a torque converter device, whereas in FIG. 8, the present invention is applied to an engine equipped with a clutch device.

In Fig. 8, a clutch device 72 drives and connects and disconnects the crankshaft 20 and the drive shaft 70. The rotating field pole member 24 also serves as a flywheel, and the position of the air gap 48 between the rotating field pole member 24 and the field core 34 is different from the configuration shown in FIG. 3.

The configuration shown in FIG. 8 can also provide the same effects as the configuration shown in FIG. 3. If a damper is attached to the flywheel or a balancer is attached to the crankshaft, the surface runout of the rotating field pole member 24, which is the flywheel, is large, so as in the embodiment of the present invention, It is particularly important to reliably support the rotating field pole member 24 in a rotatable manner relative to the field core 34 in the axial and radial directions.

"Effects of the Invention" As explained above, according to the present invention, the tip end of the rotating field pole member and the opposing portion of the field core facing the tip end are arranged such that they face each other and are inclined with respect to the crankshaft. A pair of tapered surfaces are formed, and a roller bearing is arranged between the tapered surface at the tip of the rotating field pole member and the tapered surface at the opposing portion of the field core. is reliably rotatably supported in the axial and radial directions with respect to the field core via roller bearings. Therefore, it is possible to prevent the surface runout of the rotating field pole member and the fluctuation of the air gap during engine operation, and furthermore, it is possible to set the air gap between the rotating field pole member and the field core to be smaller, thereby creating a strong magnetic flux. can be created.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional starting charging device, Fig. 2 is a graph showing the relationship between the air gap and the performance of the starting charging device, and Fig. 3 is an engine starting charging according to an embodiment of the present invention. FIG. 4 is an explanatory diagram of the main part of FIG. 3; FIG. 5 is an explanatory diagram of the configuration of a roller bearing; FIG. The diagram is
FIG. 5 is a Vl-VI sectional view, FIG. 7 is an explanatory diagram showing a case where the roller is formed of a conductor, and FIG. 8 is a diagram in which the present invention is applied to an engine with a clutch device. It is. 20--engine crankshaft, 24 - one rotation field pole member (rotor), 26- rotation field pole, 34 - field core, 36 field coil, 42 stator core, 44... stator coil, 46.48.49. ... Air gap, 50 - Tip part, 52 - Opposing part, 54 - Roller bearing, 56. 58 Tapered surface, 60 - Annular plate member, 62 - Rectangular hole, 64 - Roller. Figure 1 Figure 3 Figure 2 Air kick 7 Figure 4 ■ Figure Figure Figure

Claims (1)

[Scope of Claims] A rotating field pole member that is attached to the crankshaft of an engine and rotates integrally with the crankshaft, and a field that is fixed to the engine body side in proximity to the rotating field pole member and has a field coil. and a stator core that is fixed to the engine body side in proximity to the rotating field pole member and has a stator coil, between the rotating field pole member and the field core, and
In an engine starting/charging device in which a minute air gap through which magnetic flux can pass is formed between a rotating field pole member and a stator core, the tip of the rotating field pole member and a field core facing the tip are provided. A pair of tapered surfaces facing each other and inclined with respect to the crankshaft are formed on the opposing portions of the rotating field pole member, and a pair of tapered surfaces are formed on the opposing portions of the rotating field pole member and the tapered surfaces of the opposing portion of the field core. An engine starting/charging device characterized by a roller bearing.