KR100219192B1 - Heat conduction prevention system - Google Patents

Abstract

The present invention relates to an automotive alternator, in particular a rotating shaft provided with a pulley and a slip ring, and a front and rear bearings which are respectively press-fitted to the front and rear of the rotating shaft while supporting the rotating shaft to rotate the rotating shaft, Front and rear installed on the outside of the stator to be mounted to the rotor and the rotor assembled on the rotating shaft to be rotated in conjunction with the rotating shaft supported by the rear bearing, the stator provided in a position opposite to the rotor, the stator is mounted In the automotive alternator comprising a bracket and a brush holder made of resin and supporting the brush so that the brush is in contact with the slip ring, between the rear bracket and the rear bearing, the stator is generated from the stator and is conducted to the rear bracket. To prevent heat from conducting heat to the rear bearing. Regarding the heat conduction blocking device for a vehicle alternator, which is made of a resin material of the same material as the rush holder, is integrally formed with the brush holder, is introduced to the inside of the rear bracket, and has a heat conduction blocking member surrounding the outer ring of the rear bearing. Since a heat conduction blocking member made of a resin material protruding from the brush holder is embedded between the rear bearing and the rear bracket, the heat generated from the stator during the operation of the alternator is prevented from being conducted to the rear bearing, thereby causing damage to the heat of the rear bearing. And anti-wear to prolong life and further improve durability.

Description

Thermal conductivity breaker of vehicle alternator

The present invention relates to an automotive alternator for supplying power to a vehicle, and in particular, to prevent heat generated from the stator of the alternator from being conducted to the rear bearing through the rear bracket to prevent burnout of the rear bearing and to prolong its life. It relates to a heat conduction blocking device of a vehicle alternator.

In general, a vehicular alternator for supplying power required by the driving force of the engine is constructed as shown in FIGS. 1 and 2.

That is, a typical vehicle AC generator, as shown in FIGS. 1 and 2, the rotary shaft 30 is fixed to the end of the pulley 70 and the rotary shaft 30 so as to rotate in conjunction with the rotary shaft 30 And a stator provided on the outer side opposite to the rotor 20 so as to generate a current by the rotation of the rotor 20. 50, a front bracket 10 and a rear bracket 11 supporting the stator 50, and a front bearing 40 press-fitted to the front and rear of the rotation shaft 30 so that the rotation shaft 30 is rotated, respectively. ) And the rear bearing 41, the cover 110 provided on the outer side of the rear bearing 41, and the cover 110 is provided on the rotating shaft 30 and the slip ring housing 81 The slip ring 80 having the slip ring 80, the brush holder 90 provided on the upper side of the slip ring 80, and the slip ring facing the brush holder 90 ( It consists of a rectifier 100 provided on the lower side of 80.

Reference numerals 60 and 91 in the figure is a cooling fan that rotates in conjunction with the rotor 20 to cause the flow of air.

In addition, the rear bracket 11 is formed with a recessed groove 11 'such that the rear bearing 41 is press-installed, and a sealing member between the end of the slip ring housing 81 and the rear bracket 41. 120 is provided.

The conventional automotive alternator, the heat is generated in the stator 50, the heat generated in the stator 50 is heat conduction to the rear bracket 11, the heat conducted to the rear bracket 11 Is thermally conducted to the rear bearing 41 which is press-fitted into the recess 11 'of the rear bracket 11.

In addition, when heat is conducted to the rear bearing 41, the rear bearing 41 is thermally deformed, so that the rear bearing 41 is burned out or worn out, thereby shortening the life of the alternator and degrading the quality thereof. .

That is, the conventional automotive alternator heat conduction to the rear bearing 41, the heat generated from the stator 50 of the alternator is press-installed into the effect groove (11 ') of the rear bracket 11 through the rear bracket (11). As a result, there is a problem that the rear bearing 41 is burned out or worn out to shorten its lifespan.

The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent heat and wear of the rear bearings by preventing heat generated from the stator during conduction of the alternator from being conducted to the rear bearings through the rear brackets. It is to provide a heat conduction cutoff device of an automotive alternator that can further extend and improve durability.

In order to achieve the above object, a heat conduction blocking device for an AC alternator for a vehicle according to the present invention includes a rotating shaft having a pulley installed at one end and a slip ring installed at another end thereof, and supporting the rotating shaft so that the rotating shaft is rotated and the front of the rotating shaft. And a rotor assembled to the rotating shaft so as to rotate in conjunction with the rotating shaft supported and rotated by the front and rear bearings respectively press-fitted to the rear, and a stator provided at a position opposite to the rotor. In the vehicle alternator comprising a front and rear bracket installed on the outside of the stator so that the stator is mounted, and a brush holder made of a resin material to support the brush to contact the slip ring, the rear bracket and the rear Between the bearings, the rear end is generated in the stator The heat conduction to the bracket is made of a resin material of the same material as the brush holder so that the heat is not conducted to the rear bearing and formed integrally with the brush holder. The member is inherent.

According to the heat conduction cut-off device of the AC alternator for a vehicle according to the present invention, since the heat conduction blocking member made of a resin material protruding from the brush holder is embedded between the rear bearing and the rear bracket, heat generated in the stator during the operation of the alternator is generated. By blocking the heat conduction to the rear bearing to prevent burnout and wear caused by the heat of the rear bearing can extend the life and improve the durability more.

1 is a structural diagram schematically showing the internal structure of an on-vehicle alternator applied to a conventional example.

2 is an enlarged cross-sectional view showing a main part of an automotive alternator applied to a conventional example.

3 is a structural diagram schematically showing the internal structure of an automotive alternator employing a heat conduction blocking device applied to the present invention.

Figure 4 is an enlarged cross-sectional view showing the main part of the automotive alternator applied to the present invention.

* Explanation of symbols for main parts of the drawings

10A: Front Bracket 11A: Rear Bracket

20A: Rotor 30A: Rotating shaft

40A: Front bearing 41A: Rear bearing

50A: Stator 80A: Slip ring

90A: Brush Holder 100A: Rectifier

100: heat conduction blocking member

Hereinafter, with reference to the accompanying drawings, an embodiment of a heat conduction blocking device of an automotive alternator applied to the present invention will be described in detail.

3 is a structural diagram schematically showing an internal structure of a vehicular alternator employing a heat conduction blocking device according to the present invention, and FIG. 4 is an enlarged cross-sectional view showing a main part of the vehicular alternator according to the present invention. Parts having the same function as the prior art will be described by adding A to the same reference numeral.

3 and 4, reference numeral 30A denotes a rotating shaft provided with a pulley 70A at its end to be assembled with the engine, and a slip ring 80A provided with a slip ring housing 81A is provided at the other part.

In addition, a rotor 20A made up of a pair of pole cores 21A and 22A is assembled to the rotary shaft 30A so as to rotate in conjunction with the rotary shaft 30A, and at a position opposite to the rotor 20A. The stator 50A is provided to generate electric current by the rotation of the rotor 20A.

On the other hand, 10A and 11A in the figure is a front bracket and a rear bracket provided on the outside of the stator (50A) so that the stator (50A) is mounted, 40A and 41A is the rotary shaft (30A) to rotate smoothly ( Front and rear bearings installed at the front and rear of 30A).

In addition, reference numeral 90A denotes a brush holder made of resin and supports the brush so that the brush contacts the slip ring 80A provided on the rotary shaft 30A, and 100A denotes a rectifier.

On the other hand, reference numerals 60A and 61A are cooling fans that rotate when the rotor 20A is rotated to generate cooling air.

In addition, between the rear bracket (11A) and the rear bearing (41A), the brush is generated so that heat generated in the stator (50A) and conducted to the rear bracket (11A) is not thermally conducted to the rear bearing (41A). It is made of a resin material of the same material as the holder (90A) is formed integrally with the brush holder (90A) and is introduced to the inside of the rear bracket (11A) and at the same time the heat conduction blocking member (100) surrounding the outer ring of the rear bearing (41A) ) Is implied.

Next, the effect of the heat conduction cutoff device of the vehicle alternator according to the present invention configured as described above will be described.

First, when the vehicle is started, the engine is driven, and the pulley 70A connected to the engine is rotated by the belt by the engine.

In addition, when the pulley 70A is rotated, the rotating shaft 30A rotates in conjunction with the pulley 70A, and the rotor 20A assembled to the rotating shaft 30A by the rotation of the rotating shaft 30A. Is rotated in conjunction with.

In addition, heat is generated in the stator 50A by the rotation of the rotor 20A, and heat generated in the stator 50A is thermally conducted to the rear bracket 11A.

On the other hand, the heat conducted to the rear bracket (11A) is blocked by the thermal low temperature blocking member 100 embedded between the rear bracket (11A) and the rear bearing (41A) to the rear bearing (41A). The heat will not be conducted.

That is, between the rear bracket (11A) and the rear bearing (41A), made of a resin material of the same material as the brush holder (90A) is formed integrally with the brush holder (90A) and the rear bracket (11A) Since the heat conduction blocking member 100 enclosing the outer ring of the rear bearing 41A is introduced to the inner side of the rear bearing 41A, the heat of the rear bracket 11A is not thermally conducted to the rear bearing 41A.

In addition, since the heat generated from the stator 50A is not conducted to the rear bearing 41A, the rear bearing 41A is prevented from being burned and worn by the heat, and the burned and worn of the rear bearing 41A. Can be prevented to extend the life of the alternator and improve durability.

As described above, due to the heat conduction blocking device of the AC alternator for a vehicle according to the present invention, a heat conduction blocking member made of a resin material protruding from the brush holder is embedded between the rear bearing and the rear bracket, so that the stator is generated when the alternator is operated. The heat is prevented from being conducted to the rear bearings to prevent burnout and wear caused by the heat of the rear bearings, thereby extending the service life and improving durability.

Claims (1)

A pulley 70A is installed at one end and a rotating shaft 30A provided with a slip ring 80A at the other end, and the rotating shaft 30A is supported so that the rotating shaft 30A is rotated and the front and rear of the rotating shaft 30A. Rotors assembled on the rotating shaft 30A to be rotated in conjunction with the front and rear bearings 40A and 41A press-fitted to the rotary shaft 30A which is supported and rotated by the front and rear bearings 40A and 41A, respectively. 20A, the stator 50A provided at a position opposite to the rotor 20A, and the front and rear brackets 10A and 11A installed outside the stator 50A to mount the stator 50A. And the vehicle alternator supporting the brush so that the brush contacts the slip ring 80A, the brush holder 90A made of a resin material, between the rear bracket 11A and the rear bearing 41A. , The stator (50A) is generated in the rear bracket (1 1A) is made of a resin material of the same material as the brush holder 90A so that the heat conducted to the rear bearing 41A is not formed, and is integrally formed with the brush holder 90A, and the inner side of the rear bracket 11A. Heat conduction blocking device for a vehicle alternator, characterized in that the heat conduction blocking member 100 which is introduced to and at the same time surrounds the outer ring of the rear bearing (41A).