JPH08329763A - Waterproof structure of power source disconnecter - Google Patents

Abstract

PURPOSE: To form a smaller power source disconnecter, and reduce the number of rubber plugs and retainers. CONSTITUTION: In the male side electrode 20 penetrating through a lower case 10 of a box shape, flooding from below is prevented by interposing an O ring 16 between it and a through hole 11 in a penetrating part, and its number can be reduced than when all the other opening parts are blocked up by a rubber plug. At the same time, even if internal pressure increases since a sealed space is formed above when an upper case 30 is put on, it is sealed by the O ring 16, and the rubber plug does not slip out even when it is blocked up by the rubber plug.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a power disconnector.

[0002]

2. Description of the Related Art Conventionally, in this type of power disconnecting device,
As shown in FIG. 5, it is known to install the entire power disconnector in a waterproof box, and in recent years, a compact power disconnector having a waterproof structure has been earnestly desired in electric vehicles and the like.

[0003]

Therefore, the applicant of the present invention has devised a power disconnector including a box-shaped lower case and a lid-shaped upper case capable of covering the lower case.
A pair of male electrodes are erected on the upper surface of the lower case, and the wires are connected to the male electrodes internally by penetrating the side wall of the lower case. The ceiling surface of the upper case holds conducting electrodes that can be fitted and connected to the pair of male electrodes, and the inner peripheral wall surface of the upper case has a seal member that closes the gap with the outer peripheral surface of the lower case. Is held.
On the other hand, also in the lower case, a rubber stopper is held at the lead-out portion of the electric wire to form a sealed space inside.

However, if an attempt is made to cover the lid-shaped upper case, the pressure in the sealed space inside will increase, and in the lower case, the rubber plug of the wire tends to come out due to the internal pressure. For this reason, it is necessary to attach a retainer for preventing the stopper from coming off together with the rubber plug. The present invention has been made in view of the above problems, and an object thereof is to provide a waterproof structure of a power supply disconnecting device, which is a smaller power supply disconnecting device and can reduce rubber plugs and retainers.

[0005]

In order to achieve the above object, in the invention according to claim 1, a pair of electrodes is erected on a box-shaped first housing so as to pass through a panel of the housing. At the same time, a seal member is provided in the penetrating portion, a pair of electric wires are connected to the same pair of electrodes on the back side of the panel, and the pair of electric wires is provided on the second housing that covers the first housing. And a sealing structure for hermetically holding the conductive portion of the electrodes.

[0006]

In the present invention constructed as described above, a pair of electrodes are erected in the box-shaped first housing so as to pass through a panel of the housing, and the panel is provided for the same pair of electrodes. A pair of electric wires are connected on the back side of
When the first housing is covered with a second housing provided with a short-circuit electrode for electrically connecting the pair of electrodes,
Since the pair of electrodes is electrically connected via the short-circuit electrode, the pair of electric wires is also electrically connected. By the way, the sealing member hermetically holds the conductive portion of the electrode when the second housing is covered with the first housing, which increases the internal pressure of the sealed space. However, since the seal member is provided in the panel penetrating portion of the pair of electrodes, the upper side of the electrodes is isolated from the outside.

[0007]

As described above, according to the present invention, since the upper side of the electrode is isolated from the outside, the conductive part of the electrode is kept waterproof without being flooded from the inside of the lower case to the upper side of the electrode. It Further, even if the internal pressure on the upper side of the electrode increases, the internal pressure in the first housing, which is the back surface of the panel, does not increase, and the rubber plug does not come out.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a power disconnector to which a waterproof structure according to an embodiment of the present invention is applied, and FIG. 2 is a sectional view thereof. In the present embodiment, the pair of male electrodes 2 are provided on the box-shaped lower case 10 which is the first housing.
0 and 20 are retained, and the male side electrodes 20 and 20 are inserted into a lid-shaped upper case 30 which is a second housing capable of covering the lower case 10 from the upper surface, and a cylindrical female side capable of fitting connection. The electrodes 40, 40 are held.

In the figure, the cylindrical male side electrode 20 is
In addition to having an upper conductive portion 21 having a semi-spherical tip, a flange portion 22 is provided at a substantially central position in the longitudinal direction, and a male screw is formed on the outer peripheral surface below the flange portion 22. The screw portion 23 is provided. Lower case 10
The upper panel has two through holes 11, 11 into which the pair of male electrodes 20, 20 can be inserted from above. The through holes 11, 11 project upward from the peripheral edge of the through holes 11, 11. Cylindrical bodies 12, 12 capable of accommodating the male electrode 20
It has.

A step portion 12a having a slightly larger opening diameter is formed on the inner peripheral surface of the upper end of the cylindrical body 12, and the step portion 12 is formed.
A ring-shaped sealing member 13 is attached to a, and a cap 14 having a cross-sectional shape that encloses the outer peripheral surface, the upper end, and the inner peripheral surface with respect to the upper end of the cylindrical body 12 is attached. The cap 14 is in contact with the upper end of the seal member 13 on the inner peripheral surface side of the tubular body 12 to prevent the seal member 13 from coming off. On the bottom surface of the lower case 10, the male screw portion 23 of the male electrode is provided.
The cylindrical portions 15 and 15 for mounting the nut are formed facing each other. Male screw parts 23, 23 in each male side electrode 20, 20
The O-rings 16 and 16 are attached to the upper end of the, and the male screw portion 23 of the male electrode 20 is penetrated from the upper surface side of the through hole 11.
A collar 24 and a nut 25 are attached through the tubular portion 15. In addition, on the side surface of the lower case 10, the cylindrical portions 17 and 1 for drawing out the electric wire are provided so as to face the male screw portion 23.
7 is also formed, and the electric wire 50 having a plate-like crimp terminal 51 at the tip is inserted from the tubular portion 17, and the crimp terminal 51 is interposed between the collar 24 and the nut 25 and fixed by bolting. I am trying.

In this embodiment, an O-ring 16 is provided to seal between the panel of the lower case 10 and the male electrode 20. However, if the male electrode 20 seals the penetrating portion of the panel, the O-ring 16 is provided. Alternatively, a ring-shaped seal member or the like may be used. On the other hand, the upper case 3
0 is formed in a deep lid shape having an opening on the lower surface, and holds a pair of female electrodes 40, 40 on the ceiling surface. The female electrode 40 is formed in a cylindrical shape that opens downward, and is provided with a male screw portion 41 protruding upward on the upper surface. The male screw portion 41 forms a screw formed on the ceiling surface of the upper case 30. It is held by being screwed into the fitting hole 31. At this time, the fuse 60 having the electrodes 61, 61 into which the male screw portions 41, 41 can be inserted at both ends is aligned on the same ceiling surface, and the male screw is used for attaching the pair of female electrodes 40, 40. The part 41 to the electrode 6 of the fuse 60.
1 is inserted and screwed into the screw hole 31 of the upper case 30. As a result, the pair of female electrodes 40, 40 are electrically connected via the fuse 60 and serve as short-circuit electrodes. Female electrode 4
No. 0 can be inserted into the cylindrical body 12 of the lower case 10, and when inserted into the cylindrical body 12, the seal is provided between the outer peripheral surface of the female electrode 40 and the inner peripheral surface of the cylindrical body 12. Member 13
Is compressed and held.

In this embodiment, as shown in FIG. 3, the cylindrical body 12 is formed so as to accommodate the conductive portion 21 of the male electrode 20, and the seal member 13 is held at the opening of the cylindrical body 12. A watertight space is formed between the cylindrical body 12 accommodating the male electrode 20 and the outer peripheral surface of the female electrode 40. But,
The conductive part 21 of the male electrode 20 may be sealed, for example,
As shown in FIG. 4, instead of the seal member 13, the female electrode 40 may hold the O-ring 18 to form a watertight space. Further, a seal member may be interposed between the inner peripheral surface of the peripheral wall of the upper case 30 and the outer surface of the lower case 10 to seal the entire upper part of the lower case 10 above the upper panel.

The inner diameter of the cylindrical female electrode 40 is larger than that of the male electrode 20 and does not contact the male electrode 20 as it is, but a conductive portion is formed on the inner peripheral surface of the female electrode 40. Holds the louver 42, and the male electrode 20 is inserted while compressing the louver 42.
It is possible to obtain reliable conduction while reducing the resistance.
A handle 32 for operation is formed on the upper surface of the upper case 30, and a flexible lock arm 33 capable of engaging with the wedge-shaped projection 19 formed on the side surface of the lower case 10 is formed on the outer surface. is there.

In the present embodiment, the lower case 10 is not intentionally waterproofed from the infiltration of water from the lower side, but by closing the opening portions of the cylindrical portion 15 and the cylindrical portion 17 with a rubber stopper, a more complete waterproofing is achieved. be able to. At this time,
Even if the internal pressure rises above the male electrode 20, the O-ring 16
Since it does not affect the sealed space below, the rubber plug will not come out. Next, the operation of this embodiment having the above configuration will be described. In the lower case 10, the O-ring 16 is attached to the upper end of the male screw portion 23 of the male electrode 20, and the O-ring 16 is inserted into the cylindrical body 12 projecting to the upper surface of the lower case 10 to penetrate the through hole 11. A crimp terminal 51 is crimped to the tip of the electric wire 50, and the crimp terminal 51 is inserted into the cylindrical portion 17 on the side surface of the lower case 10 from the side of the crimp terminal 51. Lower case 1
The collar 24 is inserted through the tubular portion 15 on the back surface of 0 to be inserted into the male screw portion 23, the crimp terminal 51 is inserted, and the nut 25 is screwed and tightened. Then
The male electrode 20 is fixed to the lower case 10 by sandwiching the peripheral edge of the through hole 11 between the flange portion 22 and the collar 24, and the electric wire 50 having the crimp terminal 51 fixed at the tip is also connected.

On the other hand, in the upper case 30, the electrodes 61, 61 of the fuse 60 are connected to the screw holes 31, 31 on the ceiling surface.
Then, the male screw portion 41 of the female electrode 40 is inserted into both screwing holes 31, 31 and screwed. As a result, the female electrodes 40, 40 are fixed to the upper case 30 and electrically connected via the fuse 60. After this,
When the upper case 30 is covered on the upper surface of the lower case 10, the female electrode 40 is inserted into the cylindrical body 12 projecting on the upper surface of the lower case 10. Female side electrode 40 is cylindrical body 1
2, the conductive portion 21 at the tip of the male electrode 20 is inserted into the female electrode 40, and
The female electrode 40 is inserted into the seal member 13 held by the step portion 12a on the opening side of the cylindrical body 12. at first,
The male electrode 20 is inserted without contacting the female electrode 40, but when passing through the louver 42 held on the inner peripheral surface, the male electrode 20 is electrically connected to the female electrode 40 via the louver 42. To do. Since the contact is made via the louver 42, the insertion resistance is small. On the other hand, when the female electrode 40 penetrates the seal member 13, the female electrode 40 and the cylindrical body 12
The seal member 13 is compressed and held between itself and the inner peripheral surface thereof to form a water-like space inside the cylindrical body 12. As a result, the conductive portion 21 of the male electrode 20 and the louver 42, which is the conductive portion of the female electrode 40, are held in a water-like space against water from above.

When the upper case 30 is further pushed in, the female electrode 40 is inserted into the cylindrical body 12, and the internal pressure of the sealed space increases. However, since the O-ring 16 is mounted between the through hole 11 and the male screw portion 23 and is hermetically sealed, the increase in the internal pressure does not affect the lower part of the panel. On the contrary, since the rubber stopper is not attached to the lower part of the panel, water may enter, but the water is prevented from invading upward by the O-ring 16. Therefore, the conductive portion 21 of the male side electrode 20 and the louver 42, which is the conductive portion of the female side electrode 40, are retained like water even if they are flooded from below. When the upper case 30 is sufficiently pushed into the lower case 10, the lock arm 33 formed on the outer surface of the upper case 30 engages with the wedge-shaped projection 19 formed on the outer surface of the lower case 10,
Fixed.

As described above, the male electrode 20 penetrating the box-shaped lower case 10 has the O-ring 16 interposed between the male electrode 20 and the through hole 11 at the penetrating portion to prevent water from entering from below. The number can be reduced as compared with the case where all the opening portions are closed with a rubber plug, and when the upper case 30 is covered, a sealing space is formed above and the O-ring 16 seals even if the internal pressure increases. Even if the opening is closed with a rubber stopper, it will not come out.

[Brief description of drawings]

FIG. 1 is a perspective view of a power disconnector to which a waterproof structure according to an embodiment of the present invention is applied.

FIG. 2 is a sectional view of the power disconnector.

FIG. 3 is an enlarged sectional view of a waterproof structure.

FIG. 4 is an enlarged cross-sectional view showing another embodiment of the waterproof structure.

FIG. 5 is a perspective view of a power disconnector to which a conventional waterproof structure is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Lower case 11 ... Through hole 12 ... Cylindrical body 13 ... Sealing member 16 ... O ring 17 ... Cylindrical part 20 ... Male side electrode 21 ... Conductive part 22 ... Flange part 23 ... Male screw part 30 ... Upper case 40 ... Female side electrode 50 ... Electric wire 60 ... Fuse

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Sekimori 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd.

Claims (1)

[Claims] 1. A box-shaped first housing is provided with a pair of electrodes erected through a panel of the housing, and a seal member is provided in the penetrating portion, and electrodes of the same pair are provided. On the other hand, while connecting a pair of electric wires on the back side of the panel, a second housing that covers the first housing is provided with a short-circuit electrode for electrically connecting the pair of electrodes, and a conductive portion of the electrode is provided. A waterproof structure for a power disconnector, which is equipped with a sealing structure that holds airtightly.