KR940008592Y1 - Brush holder in ac generator for vehicle - Google Patents

Abstract

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Description

Brush holder in Ac generator for uehicles

1 is a cross-sectional view of the main portion of the generator equipped with a brush support of the automotive alternator according to an embodiment of the present invention.

2A and 2B are top views, in cross section, in plan and part of the brush support of FIG.

3 is a front view of the brush portion of FIGS. 2A and 2B.

4 is a front view showing a state where the guide cover is disposed on the brush support of FIG. 2B.

Figures 5a and 5b is a front view and a cross-sectional view of a portion of a conventional brush support.

FIG. 6 is a longitudinal sectional view of an automotive alternator equipped with the brush support of FIGS. 5A and 5B.

* Explanation of symbols for main parts of the drawings

25: compression spring 28: brush

29: connection lead 40: brush support

41: brush barrel 45: metal terminal plate

46: electrode portion

[Industrial use]

The present invention relates to a brush support of an automotive alternator that is pressed by a compression spring by inserting a brush into a brush barrel.

[Prior art]

A vehicle alternator with a brush support is shown in cross section in FIG. In the drawing, reference numeral 1 denotes a stator and is composed of a stator iron core 2 and a stator coil 3. Reference numeral 4 denotes a rotor, which means that the excitation coil 7 held between the bipolar pole cores 5 and 6 and the pole poles 5 and 6 having both pole teeth protruded from each other in the circumferential direction. Include. Reference numeral 8 denotes a rotating shaft to which the magnetic pole cores 5 and 6 are fixed, a pair of slip rings fixed to the rotary shaft 8, and reference numerals 10 and 11 to a fan fixed to the magnetic pole cores 5 and 6, respectively. )to be.

Next, reference numerals 12 and 13 are front briquettes and rear briquettes and fix the stator iron core 2 by fastening bolts 14. Reference numerals 15 and 16 are bearings for supporting the rotation shaft 8 to the front briquette 12 and the rear briquette 13, reference numeral 17 is a pulley fixed to the rotation shaft 8, and the rotation of the engine to the rotation shaft 8 The charge rotates the rotor (4).

Reference numeral 18 denotes a rectifier for rectifying the alternating current into a direct current by an alternating voltage held by the stator coil 3. 19 is a voltage regulator which detects the generator voltage, controls the excitation current and adjusts the terminal voltage to a predetermined value.

Reference numeral 20 denotes a brush support fixed to the rear briquette 13, and presses and holds the brush 28 in a vertical motion. Reference numeral 22 is a ring ring which is fixed to the rear briquette 13, surrounds the outer circumference of the slip ring 9 with a slight gap, and shields the ingress of harmful substances such as moisture and salt in the outside air.

A conventional brush support attached to the vehicular alternator is shown in FIGS. 5A and 5B, a plan view and a partial cross-sectional front view. The figure shows a state attached to the alternator. The brush support 20 is comprised with 21, 23, 24, 25, 26, 27. As shown in FIG. Reference numeral 21 denotes a brush barrel made of synthetic resin and presses the brush 28. Reference numeral 23 denotes a connector portion, 24 denotes a terminal portion, 25 denotes a compression spring for pressing the brush 28, 26 denotes an electrode portion protruding from the tip of the connecting conductor contained in the brush barrel 21. Reference numeral 27 is a cover made of synthetic resin.

The tip end of the connecting lead 29 emerging from the brush 28 is taken out from the hole in the upper wall of the brush barrel 21, wound around the electrode portion 26, and connected to it.

[A challenge to solve]

In the brush support 20 of the conventional automotive alternator as described above, the brush 28 is inserted into the brush barrel 21 from the lower side in the A direction, the leading end of the connecting lead 29 is drawn upward, and the electrode portion There was a problem that the work of winding the brush 28 to the brush supporter 20 by winding it up and attaching it to (26). In addition, since the top end of the connection lead 29 is soldered to the electrode portion 27 and soldered, the length of the free end of the connection lead 29 is shortened, and the brush 28 is worn out. There was a problem of being stretched by the connection lead 29 before reaching the limit.

When the brush 28 is worn and replaced, the solder at the tip of the connection lead 29 of the brush 28 is removed, the brush 28 is taken out downward, and the brush 28 of a new quality is removed. It is put in the brush corner 21 from below, draws out the front-end | tip part of the connection lead 29, and winds up on the electrode part 27, and it must solder, and it takes a lot of work time, and also requires hot rolling. There was a problem.

The present invention aims at solving such problems, and aims to obtain a brush supporter for an automotive alternator that facilitates assembly of the brush into the brush barrel, does not require hot rolling, and facilitates brush replacement. .

[Means for solving the problem]

The brush support of the automotive alternator according to the present invention includes a substrate in which a brush barrel is integrally formed of a molding resin material, an electrode portion for connection provided in a brush barrel, a compression spring accommodated in a brush barrel, and a compression spring. In the brush support of an automotive alternator having a brush having a connection lead for connecting the brush and the electrode part, a metal terminal plate connected to the electrode part is provided, and the connection lead is connected to the compression spring in advance and at the same time the length of the connection lead. In such a manner, the compression spring is compressed so that the brush assembly in the coupled state connected to the metal terminal plate is inserted into the brush barrel, and the metal terminal plate of the brush assembly is brought into contact with the brush barrel, thereby metallurgically joining the metal terminal plate to the electrode portion. It is fixed. The term metallurgllcaily bonded herein is a higher concept that includes welding, welding and soldering.

[Action]

In the present invention, the end of the brush connection lead is welded to the metal terminal plate in advance, and the required length of the connection lead between the metal terminal plate at the tip end of the brush is accurately set. The brush in this state may be inserted into the brush barrel, and the metal terminal plate may be soldered to the electrode portion of the brush barrel, so that the brush is easily assembled into the brush barrel, and the brush exchange workability is particularly good.

EXAMPLE

1 shows a brush support of an automotive alternator according to an embodiment of the present invention, which is a cross-sectional view of main parts of an attachment state to a generator, and reference numerals 1 to 9, 11, 13, 16, 19, and 28 are the conventional apparatuses. Is the same as Reference numeral 40 is a brush support fixed to the rear briquette 15, and the brush 28 is press-supported in such a manner as to be able to move up and down.

Reference numeral 42 is an integral ring formed integrally with the brush barrel 41 and surrounded by a slight gap on the outer circumference of the slip ring 11.

The brush support 40 is shown in FIGS. 2a and 2b a plan view and a partially sectional front view. The brush holder 40 is integrally formed with a brush barrel 41 made of synthetic resin and a partition ring 42, and a connector portion 43 and a terminal portion 44 are provided. The electrode part 46 of the front-end | tip of the connection conductor embedded in the brush cylinder 41 protrudes.

Reference numeral 45 is a metal terminal plate, and as shown in Fig. 3, the projection 45a is provided on the upper portion. In the brush 28, the connecting lead 29 passes through the compression spring in advance, the leading end passes through the metal terminal plate 45, the leading end is fitted to the projection 45a, and is welded by projection welding or the like. The connecting lead 29 is connected in parallel with the protrusion 44a, and the length of the metal terminal plate 45 and the top of the brush 28 is as desired, and is short as in the conventional brush support 20. Even if it does not interfere.

2, the compression spring 25 is fitted as mentioned above, the brush 28 by which the front end of the connection lead 29 is connected to the metal terminal plate 45 is put into the brush cylinder 41 from above, The metal terminal plate 45 is aligned with the upper end of the brush barrel 41, soldered to the electrode portion 46 emerging from the hole of the metal terminal plate 45, and then fixed. A rubber cap 47 is inserted and protected on the upper portion of the brush barrel 41, and a cover 48 made of a synthetic resin material is sandwiched and pressed thereon.

As shown in FIG. 4, the guide support 49 made of a synthetic resin material is placed on the cover 48, and the brush support 40 is attached to the attachment hole 49a through an attachment screw (not shown). At the same time, it is attached to the rear briquette 13. This prevents harmful substances such as salt from the outside air from entering the brush barrel 41 and prevents the rubber cap 47 and the cover 48 from being separated by vibration or the like.

[Effect of design]

According to the present invention as described above, the connection lead of the brush is passed through the compression spring in advance, the tip is welded to the metal terminal plate, the brush in this state is inserted into the brush barrel, and the metal terminal plate is aligned with the upper end of the brush barrel. Since the solder is connected to and fixed to the electrode portion of the upper portion of the brush barrel, the brush is easily assembled to the brush barrel, does not require hot rolling, and the connection lead between the metal terminal plate and the brush is shortened to a predetermined length. Moreover, there exists an effect, such as the operation | movement of a brush changing easily.

Claims (1)

The board | substrate with which the brush cylinder 41 was integrally shape | molded with the molding resin material, the electrode part 46 for connection provided in the brush cylinder 41, the compression spring 24 accommodated in the brush cylinder 41, and the said In the brush support of an on-vehicle alternator having a brush 28 having a connecting lead 29 for connecting the brush 28 and the electrode portion 46 through the compression spring 25, it is connected to the electrode portion 46. A metal terminal plate 45 to be provided is provided, and the connection terminal 29 is pushed through the compression spring in advance, and at the same time the compression spring 25 is compressed along the length of the connection lead 29 so that the metal terminal plate 45 ), The brush assemblies 25, 28, 29, and 45 in a coupled state are inserted into the brush barrel 41, and the metal terminal plates 45 of the brush assemblies 25, 28, 29, and 45 are inserted into the brush barrel 41. A metal terminal plate 45 is metallized by fixing the metal terminal plate 45 to the electrode portion 46, Brush support group of current generators.