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KR-102963023-B1 - ALTERNATOR FOR VEHICLE INCLUDING FIXING BAND

KR102963023B1KR 102963023 B1KR102963023 B1KR 102963023B1KR-102963023-B1

Abstract

The present invention describes various embodiments related to a vehicle alternator comprising a fixing band that is coupled to a stator, fixes the stator inside the front bracket, and forms a circular fixing band portion positioned at the center of the front bracket to prevent the stator from being eccentrically positioned from a central axis formed in the front bracket. According to one embodiment, the vehicle alternator comprising the fixing band may include a front bracket; a stator; a rotor; and a circular fixing band portion, and various other embodiments are possible.

Inventors

  • 류시혁

Dates

Publication Date
20260508
Application Date
20250627

Claims (6)

  1. A vehicle alternator comprising a front bracket, a stator coupled to the interior of the front bracket and fixed to the interior of the front bracket, and a rotor rotating within the interior of the stator, It includes a circular fixing band portion that wraps around and is coupled to the outer circumference of the stator, fixes the stator inside the front bracket, and positions the stator at the center of the front bracket to prevent the stator from being eccentrically positioned from the central axis formed in the front bracket. On the outer side of the circular fixed band portion, a plurality of first embossing protrusions are formed, which are formed on the outer circumferential surface of the circular fixed band portion and along the outer circumference of the circular fixed band portion, and protrude toward the outer direction of the circular fixed band portion. A vehicle alternator comprising a fixing band characterized by having a plurality of second embossing protrusions formed on the inner side of the circular fixing band portion, formed along the inner circumference of the circular fixing band portion, and protruding toward the inner direction of the circular fixing band portion.
  2. A vehicle alternator comprising a fixing band, characterized in that, in claim 1, a detachment prevention catch is formed on one side of the circular fixing band portion to prevent the circular fixing band portion from detaching from the stator by engaging with the stator.
  3. In claim 1, a plurality of bar-type first fixing protrusions are formed on the outer circumference of the circular fixing band portion in a direction in which the circular fixing band portion is coupled to the stator, and arranged at regular intervals along the outer circumference of the circular fixing band portion. A vehicle alternator comprising a fixing band characterized by having a plurality of bar-type second fixing protrusions formed at regular intervals along the inner circumference of the circular fixing band portion, wherein the circular fixing band portion is formed facing the direction in which it is coupled to the stator.
  4. In claim 1, a plurality of first circular protrusions are formed on the outer side of the circular fixed band portion to surround the outer circumference of the circular fixed band portion, and A vehicle alternator comprising a fixing band characterized by having a plurality of second circular protrusions formed on the inner side of the circular fixing band portion to surround the inner circumferential surface of the circular fixing band portion.
  5. In claim 1, a first grid projection is formed on the outer side of the circular fixed band portion to surround the outer circumferential surface of the circular fixed band portion and protrudes in a grid shape toward the outer direction of the circular fixed band portion. An alternator for a vehicle comprising a fixing band characterized by having a second grid projection formed on the inner side of the circular fixing band portion to surround the inner circumferential surface of the circular fixing band portion and protruding in a grid shape toward the inner direction of the circular fixing band portion.
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Description

Alternator for vehicle including fixing band The present invention relates to a vehicle alternator comprising a fixing band that allows the stator to be easily fixed to a front bracket while simultaneously preventing the stator from being positioned eccentrically from the central axis of the front bracket. Generally, vehicles contain many electrical devices, including electrical components for the engine's starting and ignition systems, as well as lamps and heating and cooling systems; batteries and generators are installed in the vehicle to supply power to these electrical devices. The power required by the vehicle is generated by a generator driven by engine output and charged into the battery. After being distributed to necessary systems such as the engine, lighting, instruments, warning displays, and heating and cooling systems as needed, the engine's rotational energy is converted into electrical energy to charge the battery in proportion to the consumed power. The aforementioned generators are classified into DC generators and AC generators depending on their rectification method, and AC generators, or alternators, are primarily used as generators for automobiles. These alternators have the advantages of being lighter and more compact than DC generators, suitable for high-speed rotation, and capable of generating sufficient power even during idling or low-speed rotation. The above-mentioned alternator comprises a front bracket having a belt pulley that transmits driving force from an engine on one side, a rear bracket coupled to the other side of the front bracket, a stator coupled to and fixed inside the front bracket, and a rotor positioned on a rotating shaft formed at the center of the stator. In this alternator, the belt pulley installed on the rotor and the drive shaft of the engine are connected by a belt, and in this state, the rotational motion of the engine is transmitted to the rotor through the belt. That is, the rotor can rotate by receiving the rotational motion of the engine through the belt. The power generation principle of the aforementioned alternator is substantially identical to that of a generator, which is based on a coil wound around a stator and a permanent magnet constituting a rotor, and in which current is generated in the coil when the permanent magnet rotates simultaneously with the rotation. Due to the high-speed rotation of the aforementioned alternator, there is significant heat generation as well as wind noise, and many studies are being conducted to improve this. Specifically, the wind noise generated by the alternator refers to the phenomenon in which a high-frequency "whirring" sound is produced from the alternator in the high-speed range of 4,000 rpm or higher, where the engine rotates at high speed. Although the intensity of this wind noise is subtle, it is quite irritating to drivers who are sensitive to sound. The cause of the above alternator wind noise is that when the rotor (12) of the alternator rotates in the engine state, vibration of the N/S pole of the rotor occurs, and the vibration of the pole is converted into sound through the air like a speaker diaphragm and appears as noise in the high-speed rotation range of 4000 rpm or more. Since the stator of a conventional alternator is fixed by adhesive bonding with silicone applied to the inside of the front bracket, this silicone takes a long time to cure. During this time, there was a problem in that the stator moved and was eccentrically positioned, deviating from the central axis of the front bracket. As such, when the stator of a conventional alternator is eccentrically positioned inside the front bracket, the rotor rotates at high speed inside the stator; therefore, there was a disadvantage in that the high-speed rotating rotor could collide with the eccentrically positioned stator, causing noise and vibration, as well as easily damaging both the stator and the rotor. Therefore, there is a need for a device that prevents the stator fixed inside the front bracket from being eccentrically positioned and simultaneously positions it at the center of the front bracket. A prior art document related to the present invention is Korean Published Patent Application No. 10-2009-0050846 (published on May 20, 2009), in which technology regarding a "vehicle alternator" is disclosed. FIG. 1 is an exploded perspective view showing the configuration of a vehicle alternator including a fixing band according to various embodiments of the present invention. FIG. 2 is a perspective view showing the state in which a front bracket and a circular fixing band portion are combined among the configurations of a vehicle alternator including a fixing band according to various embodiments of the present invention. FIG. 3 is a partially transmitted perspective view showing the combined state of a vehicle alternator including a fixing band according to various embodiments of the present invention. FIG. 4 is a side cross-sectional vi