KR19990041040U - Heatsink assembly of automotive alternator. - Google Patents

Abstract

The present invention relates to a heat sink assembly for an automotive alternator, which is impossible to discharge unnecessary melt when combining a diode with an embossing formed on the heat sink and deteriorates the assembly performance due to interference between the edge of the embossing and the mold phase of the diode. This is to solve the conventional problems.

The heat sink 27 and the diode (A) as a means for rectifying the stator assembly 15 and the rotor assembly 25, the voltage regulator 26 for maintaining the generated voltage in a constant state, and the alternating AC regulated voltage to DC. In the automotive alternator 10 is provided with a rectifier 30 composed of 28);

Forming a groove (36) in the circumferential direction at the bottom edge of the embossing (35) formed to couple the diode (28) to the heat sink (27) of the rectifier (30);

The inclined portion 37 is formed on the upper edge of the embossing 35 to facilitate discharge of the molten lead and is configured to exclude interference between the mold 38 of the diode 28 and the embossing 35. .

Description

Heatsink assembly of automotive alternator.

The present invention relates to a heat sink assembly for an automotive alternator, and more particularly, to improve embossing formed on a heat sink for assembling a diode so as to improve the assemblability of the diode and to prevent durability degradation that may occur after assembly. It is.

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 stop is composed of a plurality of diodes are combined by soldering on the embossing formed on the heat sink excellent in heat dissipation to rectify the current produced during the power generation process and to prevent the reverse flow of the battery voltage when charging the battery.

Conventionally, the embossing formed on the heat sink in order to combine the diode as described above has a shape that is simply embedded in the same size as the outer diameter of the mold surrounding the outside of the diode.

In the prior art, the diode is inserted into the embossing and then fixed by soldering. However, in the case of a large amount of molten lead, unnecessary melt can not be discharged, resulting in deterioration of durability due to excessive heat generation after assembly.

In addition, there were problems such as deterioration of assembly properties due to interference between the edge of the embossing and the mold phase of the diode.

Therefore, the present invention aims to provide a stable quality and performance stop by improving the embossing formed in the heat sink to solve the problems as described above and improving the durability after assembly as well as interference suppression when assembling the diode. .

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

2 is a side view of the rear cover of Figure 1 removed.

Figure 3 is a partially omitted cross-sectional view of the heat sink to which the technique of the present invention is applied.

Figure 4 is an extract of the assembled state of the diode in the heat sink of the present invention.

5 is a partially omitted cross-sectional view of a heat sink to which the prior art is applied.

6 is a cross-sectional view showing a state in which the diode is assembled in FIG.

7 is a cross-sectional view to exaggerate the state of failure of the prior art.

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

10; Alternator 15; Stator Assembly

25; Rotor Assembly

27; Heatsink

28; Diode

30; rectifier

35; Embossing

36; home

37; Slope

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

1 is an overall cross-sectional view of the alternator for explaining the present invention, Figure 2 is a side view of the rear cover of Figure 1 removed, Figure 3 is a partially omitted cross-sectional view of the heat sink to which the technique of the present invention is applied, Figure 4 Fig. 5 is a partial cross-sectional view of a heat sink to which the prior art is applied, Fig. 6 is a cross-sectional view showing a state in which the diode is assembled in Fig. 5, and Fig. 7 is a prior art. It will be described together as a cross-sectional view that exaggerates the defective state of.

In the automotive alternator 10, a stator assembly 15 including a stator core 13 and a stator coil 14 is press-fitted between the driver and the slip ring end frames 11 and 12, as shown in FIG. 1. .

Inward of the stator assembly 15 is supported by a bearing 16 fixed to the driver and the slip ring end frame (11, 12), the rotor shaft 17 having a pulley so as to receive power to the front side is transverse Direction is installed.

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.

Outside the slip ring 19 of the rotor assembly 25 rectifies the voltage regulator 26 and the alternating AC regulated by direct current to maintain the voltage generated in the rotor and stator assembly (15, 25) in a constant state As a means for providing a heat sink 27, the diode 28 and the rectifier 30 composed of a terminal and the like 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 brush 19 'is connected to the slip ring 19. Electric current is applied to the rotor coil 18 through the magnetic force lines in the rotor cores 23 and 24 located outside the rotor coil 18.

At this time, as the rotor shaft 17 rotates, three-phase alternating current is induced in the stator coil 14 and applied to the diode 28 of the rectifier 30, and the diode 28 applied to three-phase alternating current is subjected to full-wave rectification. It only charges the full-wave rectified current when it is higher than the voltage of and supplies current to other electronics.

In the power generation process, when the voltage exceeds the prescribed value, the voltage regulator 26 operates to maintain a constant voltage state, and the engine 28 stops to act to reverse the current from the battery to the generator. It is an operation that is impeded by.

In the above-described alternator, the conventional heat sink 1 is shown in FIGS. 5 to 7.

The conventional technique is that the edge of the embossing (3) formed to couple the diode (2) to the heat sink (1) is at right angles, which causes severe interference with the mold (3) of the diode (2). Since the alignment of (2) is not good, it is in an unstable position during soldering.

In addition, if there are more lead melts in the soldering process than necessary, the unnecessary melts are not discharged smoothly. Excessive melts are placed between the heatsink (1) and the diode (2) after assembly. It does not have the above-mentioned problems, such as failure to suppress and durability to fall, and not to perform a stable rectification action.

In the present invention in view of the above problems, the assembly of the diode 28 is improved by improving the embossing 35 formed to couple the diode 28 to the heat sink 27 of the rectifier 30 and durability after assembly. Configure this to be improved.

The construction of the present invention for this purpose is to form a groove 36 in the circumferential direction at the bottom edge of the embossing 35, and to form an inclined portion 37 at the upper edge of the embossing 35 to facilitate the discharge of lead melt And interference between the mold 38 and the embossing 35 of the diode 28 is eliminated.

The present invention as described above inserts the diode 28 into the embossing 35 of the heat sink 27 and then combined by soldering, in this process, when the lead melt is filled in the embossing 35, unnecessary melt is embossed ( Since it is discharged to the outside of the embossing 35 through the groove 36 formed on the bottom edge of the 35, the diode 28 is combined with the heat sink 27 only with a proper amount of melt.

At this time, the melt that is ejected is more easily discharged through the inclined portion 37 which is further formed on the upper edge of the embossing (35).

Of course, the inclined portion 37 may be eliminated from interference with the mold 38 of the diode 28 inserted into the embossing 35 to help improve the alignment of the inserted diode 28. will be.

The present invention as described above can be expected to have a stable operability and contribute to quality stability by improving the assembly performance by preventing interference and the removal of unnecessary melt when the diode is combined with the heat sink, and prevents high temperature during operation. Has an effect.

Claims (1)

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; A rotor assembly 25 to which rotor cores 23 and 24 having a plurality of rotor poles 21 and 22 are coupled to the outside of the spool bobbin 20; The voltage regulator 26 for maintaining the voltage generated outside the slip ring 19 in a constant state and the heat sink 27, the diode 28, etc. as a means for rectifying the alternating current of the voltage is adjusted to DC. In the automotive alternator 10 is provided with a rectifier 30 is configured; Forming a groove (36) in the circumferential direction at the bottom edge of the embossing (35) formed to couple the diode (28) to the heat sink (27) of the rectifier (30); The inclined portion 37 is formed at the upper edge of the embossing 35 to facilitate discharge of the molten lead and is configured to exclude interference between the mold 38 of the diode 28 and the embossing 35. Heatsink assembly of automotive alternator.