JPH11145641A - Cover waterproof structure for control device in vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain at low cost a cover waterproof structure, which prevents water from penetrating by a method wherein an electric body having a U-shaped section with the upper and lower ends overhung slightly on the outside is mounted on the outer surface of a clamping seat for bottom cover fitting use. SOLUTION: A clamping seat 7 for bottom cover fitting use is mounted on a box flame 2, and an elastic body 14 having a U-shaped section with both upper and lower ends overhung slightly on the outsde is bonded to the outer surface of the seat 7. A projected material overhangs on the surface, which comes into contact with a bottom cover 1, of the body 14 so that it is forcedly deformed by fitting the cover 1. When the cover 1 is clamped, the projected material is deformed and comes into contact with the surface of the cover 1, whereby water is prevented from penetrating. Accordingly, the water penetrating from the gap between a bolt 10, a spring washer 9, and a flat washer 8 into a box inside 5 through a box outside 6 can be prevented by the contact of the surface of the body 14 with the U-shaped section with the surface of the bottom cover 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an electric vehicle, and more particularly to a waterproof structure of a control device for a vehicle provided with a cover for inspection in a box.

[0002]

2. Description of the Related Art Conventionally, as a cover waterproof structure of an electric vehicle control device, a U-shaped groove is provided on a box side to which a cover is attached, a packing is mounted in the groove, and a vertical cover is provided on an outer surface of the packing. A packing structure which presses a part to obtain a waterproof effect is generally used. At this time, the packing generally has a square cross section.

FIG. 5 shows this structure. FIG.
This is an example showing the waterproof structure of the bottom cover of the control device box. A U-shaped groove 4 is mounted on the box frame 2, and a packing 3 is mounted in the U-shaped groove 4.

The vertical rising portion 11 of the bottom cover 1
It is vertically in contact with the packing 3, and at the contact portion between the outer surface of the packing 3 and the vertical rising portion of the bottom cover 1, water or dust from the outside 6 of the box is prevented from entering.

The cover is mounted on a cover mounting fastening seat 7 which is mounted adjacent to the inside of the U-shaped groove 4.
, The structure is tightened by bolts 10, flat washers 8, and spring washers 9.

However, in the present structure, as shown by the arrow in FIG. 5, from the gap between the bolt 10, the spring washer 9, and the flat washer 8 and the gap between the flat washer 8 and the bottom cover 1, toward the inside 5 of the box. There is a problem that water enters.

FIG. 6 shows a state in which the above-described cover waterproof structure is applied to a box body. FIG. 6 is a view of a cross section of the control device box frame, and a storage item 12 is stored in the box.

[0008]

As described in the above-mentioned prior art, the conventional waterproof structure of the cover has a problem that water permeates through the gap between the spring washer, the flat washer and the bolt head of the bolt fastening portion. Was.

An object of the present invention is to provide a waterproof cover structure for a control device for an electric vehicle, which is inexpensive and has a waterproof structure for preventing water from entering.

[0010]

According to the present invention, in order to achieve the above object, an elastic body having a U-shaped cross section with upper and lower ends slightly projecting outward is mounted on the outer surface of a bottom cover mounting fastening seat. ing. Conventionally, by installing this elastic body, water was prevented from entering by strong pressure contact between the packing mounted in the U-shaped groove mounted on the box frame side and the vertical rising part of the bottom cover. Therefore, the conventional waterproof structure can be eliminated and the structure can be simplified. In addition, flat washers,
Even if water enters through the gap between the spring washer and the bolt head, water can be prevented from entering inside the cover due to the surface-to-surface contact between the elastic body having a special U-shaped cross section and the bottom cover.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an enlarged view of a cover mounting portion according to the present invention.

A cover mounting fastening seat 7 is mounted on the box frame 2, and an elastic body 14 having a U-shaped cross section with both upper and lower ends projecting outward slightly is bonded to the outer surface of the cover mounting fastening seat 7. I have.

FIG. 3 shows a cross-sectional shape of the elastic body 14 having a U-shaped cross section before the deformation (before the cover is mounted), which is mounted on the outer surface of the cover mounting fastening seat 7, and FIG. FIG. 4 shows the cross-sectional shape of ()).

The surface of the elastic body 14 having the U-shaped cross section, which is in contact with the cover, has a projection projecting so as to be forcibly deformed when the cover is attached.

When the cover is tightened, the projections are deformed and come into contact with the surface of the cover, thereby preventing water from entering. At this time, the elastic body 14 having the U-shaped cross section is used.
Is preferably a chloroprene rubber or a silicon rubber.

Further, the cover mounting fastening seat 7 and the elastic body 14 having the U-shaped cross section are formed, for example, in a case where the cover is a quadrilateral having four sides, so that the four sides are continuously formed in the same cross section without gaps. Is desirable.

The bottom cover 1 is fixed to the cover mounting fastening seat 7 mounted on the inside of the box of the U-shaped groove 4 from the outside of the box by bolts 10, spring washers 9, and flat washers 8 with the bottom cover 1 clamped. doing.

Water that enters the inside 5 of the box from the outside 6 of the box through the gap between the bolt 10, the spring washer 9, and the flat washer 8 does not come into contact with the surface of the elastic body 14 having the U-shaped cross section and the bottom cover 1. It has a structure that can be prevented by surface contact.

FIG. 2 shows a state in which the present waterproof structure is applied to the box body. FIG. 2 is a view of a cross section of the control device box frame 2, and a storage item 12 is stored in the box.

With the above-described structure, it is possible to provide a waterproof property against the problem that water has entered through gaps between the bolt 10, the spring washer 9, and the flat washer 8.

Further, the number of parts of the box frame 2 alone and the number of steps for processing the cover can be reduced as compared with the conventional cover waterproof structure.

In the above description of the present invention, only the bottom cover is described.
This structure may be used for a side plate or a cover of a ceiling plate.

As described above, according to the present embodiment, the elastic body 14 having the U-shaped cross section is adhered to the outer surface of the cover mounting tightening seat 7 so that the space between the bolt, the spring washer, and the flat washer can be obtained. Water can be prevented from entering.

Furthermore, in comparison with the conventional structure in which the packing 3 is mounted in the U-shaped groove 4 and water intrusion is prevented by the contact between the vertical rising portion of the cover end and the elastic body 3,
An inexpensive box with a small number of parts and a small number of processing steps can be provided.

[0026]

As described above, according to the present invention, it is possible to obtain an inexpensive waterproof structure for a cover of an electric vehicle control device for preventing water from entering from the outside.

[Brief description of the drawings]

FIG. 1 is a detailed view of a cover fastening portion showing an embodiment of an electric vehicle control device according to the present invention.

FIG. 2 is a cross-sectional side view of the electric vehicle control device configured with the cover tightening structure of FIG. 1;

FIG. 3 is a view before deformation of an elastic body having a special U-shaped cross section according to the present invention.

FIG. 4 is a diagram after deformation of an elastic body having a special U-shaped cross section according to the present invention.

FIG. 5 is a detailed view of a cover tightening portion used in a conventional electric vehicle control device.

FIG. 6 is a cross-sectional side view of the electric vehicle control device configured with the cover fastening structure of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bottom cover, 2 ... Box frame, 3 ... Packing, 4 ... U-shaped groove, 5 ... Box inside, 6 ... Box outside, 7 ... Cover mounting fastening seat, 8 ... Flat washer, 9 ... Spring washer, 10 ... Bolts, 1
DESCRIPTION OF SYMBOLS 1 ... Vertical rising part, 12 ... Stowage, 13 ... Cylindrical sponge rubber, 14 ... Elastic body which has a U-shaped cross section, 15 ... Drainage hole, 16 ... Square jumpsuit part.

Continuing on the front page (72) Inventor Hisashi Kondo 1070 Ma, Hitachinaka-shi, Ibaraki Pref. Hitachi, Ltd. Mito Plant

Claims (2)

[Claims] 1. A cover mounting structure for a vehicle control device comprising a box frame, a cover, and a packing, wherein an elastic body having a special U-shaped cross section is formed on a screw seat surface of a cover tightening bolt formed on the box frame. A cover waterproof structure for a vehicle control device which is mounted. 2. A waterproof structure for a cover of a control device for a vehicle according to claim 1, wherein said elastic body having a special U-shaped cross section is made of sponge rubber.