JPS6016144A - Ac generator for automobile - Google Patents

Abstract

PURPOSE:To prevent a socket from colliding with an exterior article by forming a guard wall of the socket on the outer surface of an end frame, and deciding the heights from the wall, the socket and the end frame of an output terminal in the prescribed size relationships. CONSTITUTION:A hole is formed at an end frame 1, and a socket 2 is projected outside of the frame 1 through the hole. A guard wall 7 which extends perpendicularly to the frame 1 is fored at the frame 1 near the hole. The wall 7 is to protect the socket 2, and when the heights from the outer surfaces of the wall 7, the socket 2 and the frame 1 of an output terminal 3 are respectively represented by H1, H2, H3, the relationships of H1>H2, H3>H2 are set. Thus, it can prevent the socket from colliding with an exterior article.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an alternating current generator for an automobile, and particularly to protection of an external connection socket.

[Background of the invention]

The socket part of conventional automotive AC generators mainly had a structure in which the case part of the socket was made up of a part of the end frame, as seen in Japanese Utility Model Application Publication No. 52-22107, but in recent years, the socket part In order to increase reliability, waterproof sockets with increased airtightness began to be adopted. The one that adopted this waterproof socket was published in Japanese Patent Application Laid-Open No. 56-1457.
There is an advantage that the energization and socket portions seen in Japanese Patent No. 59 can be made of the same material as the terminal block to which the semiconductor voltage regulator is attached in the end frame, and the airtightness can be increased.

By the way, the above-mentioned waterproof socket has a complicated internal structure and a large external shape in order to increase airtightness, so that it has a shape that largely protrudes to the outside of the end frame of the generator.

However, since the socket part is made of an insulating material (resin), when the generator is transported or placed on a table with the end frame side facing down, the socket part hits an external object and the impact occurs. There was a problem that the socket part was damaged.

[Purpose of the invention]

The purpose of the present invention is to solve the problems of the prior art described above,
To provide an alternating current generator for an automobile in which the socket part is prevented from being damaged by being prevented from being hit by anything outside the socket part when the generator itself is placed on a stand with the end frame side facing down. It is in.

[Summary of the invention]

To achieve this object, the automotive alternator of the present invention includes a socket guard wall formed on the outer surface of the end frame, and a height Hl of the guard wall, the socket, and the output terminal from the end frame outer surface.

It is characterized in that Hl HH3 satisfies Hl > Hl and Hs > Hl.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a plan view showing the end frame portion of the automotive alternator according to the present invention, Fig. 2 is a side sectional view of Fig. 1, and Fig. 3 shows the portion where the socket is inserted in the direction A-A in Fig. 2. FIG. In the figure, an end frame 1 of an automotive alternator is provided with a socket 2 and an output terminal 3, and the socket 2 and output terminal 3 protrude outward from the end frame 1 in the axial direction of a rotating shaft 4. Wiring is connected to the socket 2 and the output terminal 3, and for example, the wiring 5 is connected to the output terminal 3. Further, the end frame 1 is provided with a hole 6, through which the socket 2 projects to the outside of the end frame 1. A guard wall 7 extending perpendicularly to the end frame 1 is formed on the end frame 1 in the vicinity of the hole 6 . This guard wall 7 is for protecting the socket 2, and the heights of the guard wall 7, the socket 2, and the output terminal 3 from the outer surface of the end frame 1 are set as H1, Hl, and Hs, respectively.
When , the height relationship is Hl > Hl and H3 > Hl. Further, the socket 2 is arranged on a straight line connecting the output terminal 3 and the guard wall 7 when viewed from the direction of the rotating shaft 4.

Further, the guard wall 7 has a substantially concave cross section in the direction perpendicular to the rotating shaft 4, and the end frame 1 surrounded by the concave opening side and the socket 2 is provided with a ventilation hole 8 that is connected to the hole 6. ing.

Since the automotive alternator according to the present invention has the above-mentioned configuration, for example, when the generator itself is placed on a flat stand with the end frame 1 side facing down, no impact is applied to the socket 2, so the socket 2 is not affected. Socket 2 will be protected.

In other words, the guard wall 7, which is taller than the socket 2, is made of the same aluminum casting as the end frame 1, and the output terminal 3 is made of iron-based bolts, and the strong guard wall 7 and the output terminal 3 receive shocks. Therefore, there is no fear that the socket 2 made of resin will be damaged.

Further, in this embodiment, since the cross-sectional shape of the guard wall 7 is approximately concave, the rib effect is increased and the guard wall 7
strength increases.

Also, since the cooling air A flows into the end frame 1 through the ventilation hole 8 provided in the end frame 1 surrounded by the guard wall 7 and the socket 2, the full-wave rectifier 9 installed inside the end frame 1 is cooled. Since it is possible to prevent the temperature of the full-wave rectifier 9 from increasing, reliability can be improved.

In addition, there is a risk that the wiring 5 connected to the output terminal 3 may move due to vibration, but since the socket 2 is placed on a straight line connecting the output terminal 3 and the guard wall 7, the wiring 5 is connected to the virtual line. As shown, when it comes into contact with the socket 2, further movement is prevented and vibration resistance is also improved.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to prevent the socket portion from colliding with an external object, thereby preventing damage to the socket portion.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of an end frame portion of an automotive alternator according to the present invention, and FIG.
The figure is a side sectional view of FIG. 1, and FIG. 3 is a sectional view of the portion into which the socket is inserted, viewed from the direction AA in FIG. 2. 1... End frame, 2... Socket, 3...
Output terminal, 4... Rotating shaft, 7... Guard wall, 8...
・Ventilation holes. Agent Patent Attorney Akio Takahashi (7)

Claims (1)

[Claims] 1. In an automotive alternator in which a socket and an output terminal protrude outside an end frame, a guard wall for the socket is formed on the outer surface of the end frame, and the guard wall, the socket, and the output The height of the terminal from the outer surface of the end frame Hl, ・Hz+・Hs, Hl>Hz, Hm
>An automotive alternator characterized by Hs. 2. In claim 1, the guard wall:
1. An automotive alternator, characterized in that the cross section perpendicular to the rotating shaft is substantially concave, and ventilation holes are provided in the concave opening side of the guard wall and in the end frame portion surrounded by the socket. 3. The automotive alternator according to claim 1 or 2, wherein the socket is arranged on a straight line connecting the output terminal and the guard wall when viewed from the direction of the rotation axis.