KR20000004139U - Brush assembly sealing device for automotive alternator. - Google Patents

Abstract

The present invention relates to a brush assembly sealing device for an automotive alternator, which is improved to prevent the explosion from ignition by blocking external gas inflow into the slip ring of the alternator and the brush, and the driver and the slip ring end frame. (11, 12) rotor assembly 25 which is installed in the transverse inward direction of the stator assembly 15 and the stator assembly 15 press-fitted between the phases;

The slip ring 19 has a brush holder 28 having a brush 29 inserted therein for applying the battery power to the rotor coil 18 through the slip ring 19 to magnetize the rotor cores 23 and 24. A rectifier for rectifying the voltage regulator 30 and the alternating AC regulated by DC to the outside of the slip ring 19, to maintain the voltage generated in the rotor and stator assembly (15, 25) in a constant state In the alternator (10) provided with (31);

A flange 43 and a slip ring end frame 12 formed inside the space 41 and the brush holder 28 between the outer end portion 40 and the slip ring cover 27 of the brush holder 28. Sealing through the cap 42 and the O-ring 45, respectively, in the space 44 between the phases;

The slot 33 of the rotor shaft 17 into which the lead wire 32 of the slip ring 19 is press-fitted further includes a slip ring gasket 50 to block foreign material and harmful gas from entering. do.

Description

Brush assembly sealing device for automotive alternator.

The present invention relates to a brush assembly sealing device for an automotive alternator. More specifically, the brush assembly has been improved so that the external gas inflow into the slip ring and the brush of the alternator can be prevented from being exploded due to ignition. It is about giving.

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

The automotive alternator is largely composed of a stator assembly press-fitted between a driver and a slip ring end frame and a rotor assembly supported by a rotor shaft inside thereof.

Outside the slip ring of the rotor assembly is a configuration that is provided with a voltage regulator and the like to rectify the generated alternating current into a direct current to the battery to charge and maintain the generated voltage in a constant state.

The slip ring is press-fitted to the end of the rotor shaft and serves to magnetize the rotor core by applying the power of the battery to the rotor coil in a state of being connected to the outer brush.

Conventionally, various foreign materials are introduced through the gap between the bearing shield and the brush holder and the gap between the slip ring cover and the brush holder, and noxious gas is introduced, since no separate sealing means is provided in the slip ring and the brush as described above. The situation is not blocked.

If it is not possible to block the inflow of foreign substances and harmful gases as described above, the contact between the brush and the slip ring phase is poor due to the accumulation of the foreign substances introduced, causing a problem in that power generation is not performed due to poor current application to the rotor coil. do.

In particular, when noxious gas is introduced between the slip ring and the brush holder, there is a high risk of explosion of the generator due to the spark generated when the brush and the slip ring contact at the beginning of the power generation operation.

In addition, the flow of the brush holder and the slip ring cover due to the vibration generated in the operation of the generator has a problem such as causing noise.

This is because the brush holder located on the outer side of the slip ring and the slip ring cover are coupled to each other while maintaining a predetermined space, and thus there is no means for absorbing even a slight vibration.

Therefore, the present invention solves the problems as described above to block the inflow of foreign substances and harmful gas between the gap between the brush holder and the bearing shield and the slip ring cover to enable a stable power generation action, as well as vibration caused by the vibration generated during operation It aims to contribute to improving the performance and quality of the generator by preventing the phenomenon.

1 is an overall cross-sectional view of an alternator for explaining the present invention.

Figure 2 is a cross-sectional view taken a portion of the brush assembly to which the technique of the present invention is applied.

Figure 3 is an exploded perspective view of the slip ring assembly to which the technique of the present invention is applied.

Figure 4 is a perspective view of the bonded state of FIG.

* Description of the symbols used in the main parts of the drawings *

10; Alternator

19; Slip ring

29; brush

41,44; Space

42; cap

45; O-ring

50; Slip Ring Gasket

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the preferred embodiment of the present invention for achieving the above object.

1 is an overall cross-sectional view of an alternator for explaining the present invention, FIG. 2 is a cross-sectional view of a portion of the brush assembly to which the technology of the present invention is applied, FIG. 3 is an exploded perspective view of the slip ring assembly to which the technology of the present invention is applied, and FIG. 4. Will be described together as a perspective view of the coupled state of FIG.

As illustrated in FIG. 1, the stator assembly 15 including the stator core 13 and the stator coil 14 is press-fitted between the driver and the slip ring end frames 11 and 12, as illustrated in FIG. 1.

Inside the stator assembly 15, the rotor shaft is supported by a bearing 16 fixed to the driver and the slip ring end frames 11 and 12 and has a pulley 17 'at the front end to receive power. 17) is installed in the transverse direction.

In the middle of the rotor shaft 17 is coupled to the spool bobbin 20 wound around the rotor coil 18 and connected to the slip ring 19 press-fitted to the rear of the rotor shaft 17, the spool bobbin 20 Outside of the rotor assembly 25 having a plurality of rotor poles (21, 22) having a plurality of rotor poles (21, 22) is coupled to accommodate the spool bobbin 20 is provided.

The brush holder 28 is positioned between the bearing shield 26 and the slip ring cover 27 on the slip ring 19 of the rotor assembly 25, and the battery power is supplied to the inside of the rotor ring through the slip ring 19. A brush 29 is inserted to apply to (18) to magnetize the rotor cores 23 and 24.

Outside of the slip ring 19 as a means for rectifying the voltage regulator 30 for maintaining the voltage generated in the rotor and the stator assembly (15,25) in a constant state and the alternating voltage to a direct current Rectifier 31 composed of a heat sink, a diode and a terminal is provided.

In the operation of the alternator 10 as described above, when the engine is started, the rotor shaft 17 rotates the power of the engine, and at the same time, the power of the battery is connected through the brush 29 connected to the slip ring 19. A current is applied to the rotor coil 18 to generate magnetic force lines in the rotor cores 23 and 24 located outside the rotor coil 18.

At this time, the rotor shaft 17 rotates so that the three-phase alternating current is induced to the stator coil 14 to the diode of the rectifier 31, and the diode receiving the three-phase alternating current is full-wave rectified to be higher than the voltage of the battery. It charges the full-wave rectified current and supplies current to other electronics.

When the voltage exceeds the prescribed value during the power generation process, the voltage regulator 30 operates to maintain a constant voltage state at all times, and the engine is stopped to prevent the current flowing from the battery to the generator to be reversed by the diode. It is the operation that is done.

In the present invention, the brush holder 28 and the bearing shield 26 and the slip ring cover 27 which accommodate the brush 29 connected to the slip ring 19 press-fitted to the rear end of the rotor shaft 17 are generated. It is configured to block the slot 33 formed in the rotor shaft 17 so that the gap and the lead wire 32 of the slip ring 19 can be press-fitted to prevent harmful gas and various foreign substances from entering.

The configuration of the present invention for achieving the above object;

The space 41 generated between the outer end portion (left of the drawing) 40 and the slip ring cover 27 of the brush holder 28 is sealed using a cap 42 made of rubber material, and the brush holder 28 is closed. The space portion 44 between the flange 43 and the slip ring end frame 12 formed on the inner side (right side of the drawing) is sealed through the O-ring 45.

A cap 42 interposed between the outer end portion 40 of the brush holder 28 and the slip ring cover 27 has an accommodation groove 46 for accommodating the outer end portion 40 of the brush holder 28. It is preferable to form so that the outer end portion 40 of the brush holder 28 is pressed to maintain the airtightness.

The slot 33 of the rotor shaft 17 into which the lead wire 32 of the slip ring 19 is press-fitted is inserted through a slip ring gasket 50 made of rubber material to block foreign substances and harmful gas from entering. .

The slip ring gasket 50 forms a coupling hole 52 at the center so that the end of the rotor shaft 17 can be coupled to the disc-shaped body 51, and lead wires of the slip ring 19 are formed at both sides thereof. 32 forms a through-hole 53 through which it can pass.

The outer side of the through-hole 53 is formed integrally with the body 51, the blocking pin 55 is integrally formed so as to block the outside of the slot 33 in which the lead wire 32 is pressed.

The present invention as described above;

The cap 42 and the O-ring 45 block the spaces 41 and 44 generated between the bearing shield 26 and the slip ring cover 27 and the brush holder 28 and the slip ring end frame 12. As a result, foreign substances and harmful gases are blocked from flowing into the slip ring 19 and the brush 29 through these gaps.

In addition, foreign substances and harmful gases introduced through the slot 33 into which the lead wire 32 of the slip ring 19 is press-fitted are slip ring gaskets further interposed between the rotor shaft 17 and the slip ring 19. By 50).

Since the inflow of foreign substances and harmful gases to the slip ring 19 and the brush 29 is blocked as described above, even if a poor contact between the slip ring 19 and the brush 29 or spark occurs in the initial operation, there is a risk of poor power generation and explosion. It can be excluded from the stable development can be made.

In particular, the vibration of the slip ring cover 27 and the brush holder 28 itself is also prevented by vibrations generated during the power generation process, thereby preventing noise from being caused, as well as being free from fear of damage. do.

The present invention as described above prevents the inflow of foreign substances and harmful gases between the brush holder, the bearing shield, and the slip ring cover, and enables stable power generation, and also prevents vibration caused by vibrations during operation. It has the effect of contributing to the improvement of generator performance and quality.

Claims (3)

A stator assembly (15) comprising a stator core (13) and a stator coil (14) press-fitted between the driver and the slip ring end frames (11, 12); A rotor shaft 17 installed in an inner direction of the stator assembly 15; A spool bobbin 20 wound around the rotor coil 18 and coupled to the slip ring 19 to be coupled to the middle of the rotor shaft 17; Rotor assembly 25 is coupled to the rotor core (23, 24) having a plurality of rotor poles (21, 22) on the outside of the spool bobbin 20, A brush holder 28 into which the brush 29 is inserted into the slip ring 19 to magnetize the rotor cores 23 and 24 by applying battery power to the rotor coil 18 through the slip ring 19. Is provided; In the alternator 10 which is provided with a voltage regulator 30 and a rectifier 31 outside of the slip ring 19; Between the outer end portion 40 of the brush holder 28 and the upper portion of the slip ring cover 27 and the flange 43 and the slip ring end frame 12 formed on the inner side of the brush holder 28 Sealing through the cap 42 and the O-ring 45 to the space 44 of the respectively; The slot 33 of the rotor shaft 17 into which the lead wire 32 of the slip ring 19 is press-fitted further includes a slip ring gasket 50 to block foreign material and harmful gas from entering. Brush assembly sealing device for automotive alternator. The method of claim 1; A cap groove interposed between the outer end portion 40 and the slip ring cover 27 of the brush holder 28 accommodates the outer end portion 40 of the brush holder 28 to maintain airtightness ( Brush assembly of the automotive alternator characterized in that it further forms 46). The method of claim 1; The slip ring gasket 50 is formed in the center of the disk-shaped body 51 is coupled to the coupling hole 52 and the end of the rotor shaft 17, Through holes 53 formed at both sides of the coupling hole 52 to allow the lead wire 32 of the slip ring 19 to pass therethrough, Located in the outside of the through-hole 53 is formed integrally with the body 51, characterized in that it comprises a blocking pin 55 for blocking the outside of the slot 33 in which the lead wire 32 is pressed Brush assembly sealing device for automotive alternator.