KR20180065372A - Alternator for vehicle comprising rotor core having protruding key - Google Patents

Abstract

The present invention discloses an alternator for a vehicle, including a rotor core with a protruding key. The alternator for a vehicle according to an embodiment of the present invention includes a stator assembly mounted on a casing, the rotor core installed inside the stator assembly and including a plurality of rotor poles arranged to face each other, and a spool bobbin installed inside the rotor core. The protruding keys are formed on the lateral side of the spool bobbin and one side of an opposite side thereof. A recessed hole coupled to the protruding key is formed on the inner side of the rotor core. Accordingly, the present invention can implement the stable operation performance of the alternator.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an alternator for automotive alternator,

The present invention relates to an automotive alternator including a rotor core having a protruding key, and more particularly, to an automotive alternator having a protruding key formed thereon. More specifically, when the alternator rotates, To an automotive alternator capable of realizing stable operability of a generator.

Generally. The automotive alternator is one of the engine electrical components, which is connected to the engine and the belt to charge the battery power consumed and to supply the current required for the operation of other electrical components.

1, a stator assembly 14 composed of a stator core 12 and a stator coil 13 is press-fitted between casings 10 and 11, and on the inner side thereof, (16) supported by bearings (15) pushed into the bearings (10, 11) and having a pulley (p) for power transmission at its tip.

A rotor coil 17 is wound at the center of the rotor shaft 16 and a spool bobbin 19 connected to a rear slip ring 18 is inserted into the rotor shaft 20. A plurality of rotor pawls 20, The rotor assembly 24 is provided with a rotor core 22 and a rotor core 22, which are coupled to each other to receive the spool bobbin 19.

A voltage regulator 25 is provided outside the slip ring 18 of the rotor assembly 24 to maintain the voltage generated by the rotor and the stator assembly 14 in a constant state, a rectifier 26 for converting AC into direct current, Is fixed.

Meanwhile, the slip ring 18 of the rotor assembly 24 is connected to an outer brush to apply power to the rotor coil 17 to magnetize the rotor cores 22 and 23.

2, a schematic view of the rotor core 22, 23 and the spool bobbin 19 is shown. In the conventional combination of the rotor cores 22 and 23 and the spool bobbin 19, the rotor pawls 20 and 21 are varied during assembly.

Due to such a deviation, when the alternator is operated, noise fluctuation occurs depending on the intervals of the rotor poles 20 and 21, and a uniform magnetic force is not maintained, thereby deteriorating performance.

Korean Patent Application No. 10-2010-0083355

In order to solve the above-mentioned problems, one embodiment of the present invention is to maintain stable uniform operation of the alternator by maintaining a constant gap between the rotor pole and the spool bobbin. And to provide an AC generator for a vehicle.

According to an aspect of the present invention, there is provided a stator comprising: a stator assembly mounted on a casing; a rotor core disposed inside the stator assembly and having a plurality of rotor pawls formed and opposed to each other; and a spool bobbin installed inside the rotor core An alternator (1) comprising:

Protruding keys are formed on one side of the side surface and the opposite surface of the spool bobbin,

A recessed hole may be formed on the inner surface of the rotor core so that the protruding key can be inserted.

At least one of the protrusion keys may be formed at regular intervals with respect to the rotation axis.

The projecting key may have a polygonal or circular cross section.

The protruding length of the protruding key may be 3% to 10% of the thickness of the spool bobbin.

According to an embodiment of the present invention, an automotive alternator including a rotor core in which a protruding key is formed is characterized in that rotor pawls of the rotor core arranged opposite to each other are maintained at equal intervals, It is possible to generate electricity and reduce the mechanical noise.

Further, it is possible to provide an effect of improving the workability even in the model in which the rotor pawls are held at the same interval and the magnets are inserted into the rotor core.

1 is a cross-sectional view of a conventional automotive alternator.
2 is a plan view and a vertical sectional view of a conventional spool bobbin and a rotor core.
3 is a top view and a cross-sectional view of a spool bobbin and rotor core according to one embodiment of the present invention.
Fig. 4 is a schematic view of the spool bobbin of Fig. 3;
5 is a schematic plan view of a spool bobbin according to another embodiment of the present invention.

Various embodiments of the present invention will now be described by way of specific embodiments shown in the accompanying drawings. The differences between the embodiments of the present invention described below are to be understood as mutually exclusive. That is, the specific shapes, structures, and characteristics described may be embodied in other embodiments in accordance with one embodiment without departing from the spirit and scope of the present invention, It is to be understood that the arrangements may be altered, where like reference numerals refer to like or similar features throughout the several views, and length and area, thickness, and the like may be exaggerated for convenience.

3 shows a top view and a cross-sectional view of a spool bobbin and a rotor core according to one embodiment of the present invention.

Referring to FIG. 3, rotor pawls 135 and 136 are protruded from outer circumferential portions of the rotor cores 131 and 132, respectively. The rotor cores 131 and 132 are formed with indented holes 133 and 134 at positions corresponding to the protruding keys 111 and 112 formed in the spool bobbin 110, respectively.

The spool bobbin 110 is provided with protruding keys 131 and 132 on one side surface of the opposite surface in symmetry with one side surface and the axial direction with respect to the axial direction.

That is, when the pair of rotor cores 131 and 132 are coupled while being wrapped around the spool bobbin 110 so as to be positioned in the inner space, the spool bobbin 110 is inserted into the recessed holes 133 and 134 formed in the rotor cores 131 and 132 The positions of the rotor cores 131 and 132 and the spool bobbin 110 are fixed.

Therefore, since the intervals between the rotor pawls 135 and 136 formed in the rotor cores 131 and 132 are fixed to be constant, uniform magnetization is possible, and stable power generation with small deviation is possible.

Fig. 4 is a schematic view of the spool bobbin of Fig.

4, the protruding length L of the protruding key 111 formed on the spool bobbin 110 has a length of 5% of the thickness T of the spool bobbin 110. If the protruding length L is smaller than the 3% size of the spool bobbin thickness T, the positions of the rotor cores 131 and 132 and the spool bobbin 110 may be changed or the protruding length L may be changed Larger than 10% size can result in less durability.

FIG. 5 is a plan view of a spool bobbin according to another embodiment of the present invention.

5, the protruding keys 211, 212, 213 and 214 are formed on the concentric circles passing through respective lines along the X-axis and Y-axis center lines, and are formed at even intervals in the spool bobbin 210. [ Indentation holes are formed in the inner surface of the rotor core at positions corresponding to the protruding keys 211, 212, 213, and 214, respectively. Therefore, the workability can be improved while the rotor pawls are maintained at the same interval.

3 except that the positions of the protruding keys are different from each other. Therefore, a duplicate description will be omitted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Deletion, addition or the like of the present invention may be variously modified and changed within the scope of the present invention.

110: spool bobbin 111: projecting key
112: protruding key 131: rotor core
132: rotor core 133: indentation hole
134: indentation hole 135: rotor pole
136: rotor pole 210: spool bobbin
211, 212, 213, 214: projecting key

Claims (4)

1. An AC generator comprising: a stator assembly mounted on a casing; a rotor core disposed inside the stator assembly and having a plurality of rotor pawls formed to face each other; and a spool bobbin installed inside the rotor core;
Protruding keys are formed on one side of the side surface and the opposite surface of the spool bobbin,
Wherein an indentation hole is formed in an inner surface of the rotor core so that a protruding key can be inserted. The automotive alternator as set forth in claim 1, wherein at least one of the projecting keys is formed at an equal interval with respect to the rotation axis. The automotive alternator as set forth in claim 1, wherein the projecting key has a polygonal or circular cross section. The automotive alternator as claimed in claim 1, wherein the protruding length of the protruding key is 3% to 10% of the thickness of the spool bobbin.

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