WO2016147860A1

WO2016147860A1 - Sealing cover for electric device

Info

Publication number: WO2016147860A1
Application number: PCT/JP2016/056338
Authority: WO
Inventors: 憲史梅村
Original assignee: 住友電装株式会社
Priority date: 2015-03-19
Filing date: 2016-03-02
Publication date: 2016-09-22

Abstract

A sealing cover 10 for covering an operational opening portion 91 provided in a case 90 of an electric device is provided with: a cover body 60 covering the opening portion 91 of the case 90 and attached to a surface of the case 90; and a sealing member holding member 20 that can be fitted into the opening portion 91 and that has a sealing member 27 mounted to a peripheral surface thereof, the sealing member being capable of water-tightly adhering to an inner peripheral surface of the opening portion 91, wherein the cover body 60 comprises an opposing plate portion 61 opposing the sealing member holding member 20, and peripheral edge plate portions 63, 65, 67 protruding from the peripheral edge of the opposing plate portion 61 toward the case 90 and making contact therewith, with a gap provided between one peripheral edge plate portion 67 and the case 90, and with a water drain hole 77 provided between another peripheral edge plate portion 65 and the case 90.

Description

Seal cover for electrical equipment

The technology disclosed in the present specification relates to a seal cover that is detachably mounted to cover a working opening provided in an electric device.

For example, an electrical device mounted in an automobile or the like is provided with a connector, a terminal block, and the like for connecting to the outside inside the case. And in order to perform the connection work with the exterior, the opening part is provided in the case of the electric equipment. When no connection work is performed, a seal cover called a service cover is attached to the opening. As an example of the seal cover of such an electric device, one described in Japanese Patent Application Laid-Open No. 2012-236450 (Patent Document 1 below) is known. The seal cover includes a cover main body capable of covering the opening, and a seal member holding member fitted into the opening on the back surface of the cover main body, and the seal member is disposed on the outer peripheral surface of the seal member holding member. Installed. Then, when the seal cover is put on the opening and locked, the seal member on the outer peripheral surface of the seal member holding member is tightly sealed to the inner peripheral surface of the opening, so that water enters from the opening or foreign matter is mixed in. Etc. can be prevented.

In such a seal cover, the seal member holding member and the cover main body are held by screwing the cover main body to a nut provided on the seal member holding member side. When screwing, the pin protruding from the seal member holding member is inserted into the restriction hole provided in the cover body, so that the seal member holding member can be prevented from rotating when screwing. It is done.

JP 2012-236450 A

However, in a seal cover such as Japanese Patent Application Laid-Open No. 2012-236450 (Patent Document 1), water may enter from a hole in the cover body such as a restriction hole through which a pin can be inserted or a gap between the cover body and the case. There is. And if the infiltrated water stays between the cover and the case, it may corrode.

A seal cover for an electrical device disclosed in the present specification is a seal cover for covering a work opening provided in a case of an electrical device, and covers the opening of the case, and the surface of the case A cover main body attached to the opening, and a seal member holding member fitted to the outer peripheral surface of the seal member that can be fitted into the opening and that adheres to the inner peripheral surface of the opening in a water-tight manner. The main body includes a counter plate portion that faces the seal member holding member, and a peripheral plate portion that protrudes and contacts the case side from the periphery of the counter plate portion. While a gap is provided between the case and the other peripheral plate portion, a drain hole is provided between the case and the case.

According to such a configuration, the water that has entered from the gap between the peripheral plate portion of the cover body and the case will be discharged from the drain hole provided between the other peripheral plate portion and the case, It will not stay in the seal cover.

As an embodiment of the seal cover of the electric device disclosed in this specification, the following configuration may be adopted.
The seal cover is attached to a side surface of the case, and the peripheral plate portion provided with a gap between the seal cover and the case is disposed above, while the notch portion is provided. The said peripheral board part is good also as a structure distribute | arranged below.
According to such a configuration, since the gap is arranged on the upper side, it is easy for water to enter. However, since the water can be discharged from the drain hole provided below, the water can be discharged more reliably. .

According to the seal cover of the electrical device disclosed in the present specification, even if water enters the seal cover from the gap between the case and the seal cover, it can be discharged out of the seal cover.

The perspective view of the seal cover of the electric equipment concerning an embodiment Front view Plan view Rear view Bottom view Side view Sectional view taken along line VII-VII in FIG. Sectional drawing in the state attached to the electric equipment in the same position as FIG.

<Embodiment 1>
A first embodiment will be described with reference to FIGS.
The seal cover 10 of the present embodiment closes a working opening 91 of a connector 90 (an example of “case”) attached to a shield case of an electric device such as a motor or an inverter mounted on a vehicle. . In the present embodiment, description will be made with the upper side in FIGS. 2 and 7 as the upper side and the lower side in FIGS. 2 and 7 as the lower side. The opening direction of the connector 90 (the direction in which the seal cover 10 is detached from the connector 90) is defined as the front, and the direction in which the seal cover 10 is fitted with the connector 90 is defined as the rear.

As shown in FIG. 8, the connector 90 is connected to a terminal block (not shown) provided in the shield case, and the bracket 93 of the connector 90 is fixed to and integrated with the shield case. The terminal 95 held by the connector 90 can be fixed to a stud bolt protruding from the terminal block. When connecting the terminal 95 to the terminal block, the work is performed in a state where the opening 91 is opened forward (side of the shield case). When no connection work is performed, the opening 91 is closed by the seal cover 10.

As shown in FIGS. 6 and 7, the seal cover 10 includes a seal member holding member 20, an interlock connector 40, and a cover body 60.
As shown in FIGS. 4 and 8, the seal member holding member 20 is made of synthetic resin, and has a horizontally long fitting portion 21 that can be fitted in the opening 91, and the fitting portion 21. And a fixing portion 23 which is positioned forward and fixed to the cover main body 60. On the outer peripheral surface of the fitting portion 21 of the seal member holding member 20, a seal mounting groove 25 is formed over the entire periphery. A seal member 27 having an oval ring shape is fitted in the seal mounting groove 25. The outer diameter of the seal member 27 is set slightly larger than the inner diameter of the opening 91. In addition, a flange portion 29 is provided in front of the seal mounting groove 25. The flange portion 29 comes into contact with the front end edge portion of the opening 91 of the connector 90.

As shown in FIGS. 1 and 7, the fixing portion 23 includes a peripheral wall portion 31 that contacts the rear surface of the cover body 60, a boss portion 33 that protrudes forward from a substantially central position of the fitting portion 21, and a boss And positioning pins 35 projecting from the periphery of the portion 33. The peripheral wall portion 31 protrudes forward from the front surface of the fitting portion 21 so as to surround the boss portion 33 and the like. The peripheral wall portion 31 is provided continuously over substantially the entire periphery of the peripheral portion of the fixed portion 23.

As shown in FIG. 7, the boss portion 33 is provided at a substantially central position on the front surface of the fitting portion 21 and has a substantially cylindrical shape. The protruding end surface of the boss portion 33 is provided with a pilot hole 33A into which a female screw is cut into a tap screw 80 described later. Further, as shown in FIG. 1, positioning pins 35 are provided on the peripheral edge of the boss portion 33. The positioning pin 35 has a cylindrical shape whose outer diameter is smaller than that of the boss portion 33. And the height dimension is larger than the peripheral wall part 31 and the boss | hub part 33. FIG.

Then, as shown in FIGS. 1 and 7, a tap screw 80 is screwed into the pilot hole 33 A of the boss portion 33. The tap screw 80 includes a substantially circular head portion 81, a ring portion 83 having an enlarged diameter of the head portion 81, and a screw portion 85 capable of cutting a screw into the prepared hole 33A. The outer diameter of the ring portion 83 is larger than the diameter of an insertion hole 73 of the cover main body 60 described later, and the ring portion 83 is in contact with the upper end surface of the boss portion 33 and at the hole edge of the insertion hole 73. Lock to prevent it from coming off.

Further, as shown in FIGS. 3 and 4, an interlock connector 40 constituting an interlock mechanism is attached to the seal member holding member 20 in a form that can move relative to the seal member holding member 20. ing. The interlock connector 40 has a short terminal 43 accommodated in a housing 41 made of synthetic resin.

As shown in FIGS. 1 and 2, the cover body 60 is formed by pressing a metal plate such as a steel plate. As a whole, the cover body 60 has a generally rectangular shape capable of covering the opening 91. It has a shape. More specifically, the cover main body 60 is in contact with the peripheral wall 31 of the seal member holding member 20 and covers the front (front) of the opening 91 and covers the front plate 61 (an example of a “counter plate”), It has a side plate portion 63 positioned on the side surface in the longitudinal direction, a lower plate portion 65 positioned on the lower side surface, and an upper plate portion 67 positioned on the upper side surface. In addition, the side plate part 63, the lower plate part 65, and the upper plate part 67, which are formed continuously from the front plate part 61, are an example of the peripheral plate part.

The front plate portion 61 has a substantially rectangular shape as a whole. Then, the lower side and the side surface are tapered portions 61 A that are inclined so as to be continuous with the lower plate portion 65 and the side plate portion 63. Further, as shown in FIGS. 1 and 7, a substantially circular concave portion 71 that is recessed rearward is provided at a substantially central portion of the cover main body 60 of the front plate portion 61. The recess 71 has an outer diameter larger than the outer diameter of the tap screw 80.

A substantially circular insertion hole 73 through which the boss 33 can be inserted is provided at the center of the recess 71. The insertion hole 73 penetrates in the plate thickness direction of the front plate portion 61 and has a predetermined clearance C 1 with respect to the front end portion of the boss portion 33. In a state where the boss portion 33 is inserted through the insertion hole 73, the recess 71 is recessed so that the boss portion 33 slightly protrudes from the surface of the recess 71. In addition, a pin insertion hole 75 through which the positioning pin 35 can be inserted is provided at the peripheral edge of the recess 71. The pin insertion hole 75 has a substantially circular shape and has an inner diameter having a clearance C 2 with respect to the outer diameter of the positioning pin 35.

As shown in FIGS. 1 and 6, the side plate portion 63 is connected to the tapered portion 61 A of the front plate portion 61 so that the rear end of the side plate portion 63 is in contact with the front surface of the connector 90. Further, the mounting plate portion 69 is formed to project from the lower end portion of the side plate portion 63 toward the side, and bolt insertion holes 69A through which bolts for fixing to the bracket 93 and the like can be inserted are opened. Yes. In addition, since the upper side of the connector 90 protrudes ahead, the side plate part 63 is cut out in a substantially half region on the upper side in accordance with its shape.

As shown in FIGS. 1 and 3, the lower plate portion 65 is connected to the tapered portion 61 A of the front plate portion 61 so that the rear end of the lower plate portion 65 is in contact with the front surface of the connector 90. Further, both end portions in the longitudinal direction of the lower plate portion 65 are continuous with the side plate portion 63. Near the center of the lower plate portion 65, a drain hole 77 is provided in which a rear end portion is formed in an arc shape so that a gap is formed between the lower plate portion 65 and the connector 90. In the central portion of the drain hole 77 (the portion where the gap between the connector 90 is the largest), the height of the lower plate portion 65 is approximately one third of the height dimension (the dimension in the front-rear direction). Yes.

As shown in FIGS. 5 and 8, the upper plate portion 67 is continuous so that the end portion of the front plate portion 61 is bent substantially vertically. The upper plate portion 67 has a slight gap between it and the side plate portion 63. Further, in accordance with the shape of the connector 90, the rear end position of the upper plate portion 67 is considerably forward of the rear end position of the lower plate portion 65, and the rear end of the upper plate portion 67 and the front surface of the connector 90 are arranged. There are some gaps between them. A rectangular notch 79 is provided at a substantially central position of the upper plate portion 67. This notch 79 is provided to avoid the bolt of the connector 90.

The seal cover 10 of the present embodiment has the above-described structure, and is assembled by the following procedure, for example. First, the seal member 27 is fitted into the seal mounting groove 25 of the seal member holding member 20. Next, the sealing member holding member 20 is disposed on the rear surface of the cover body 60 while the positioning pin 35 of the sealing member holding member 20 is inserted into the pin insertion hole 75 and the boss portion 33 is inserted into the insertion hole 73.

Then, the tap screw 80 is fitted into the pilot hole 33A of the boss portion 33 and tightened. In addition, the recessed part 71 which is the peripheral part of the insertion hole 73 in which the boss | hub part 33 in which the tap screw 80 is screwed is recessed in the back side, and the protrusion height of the boss | hub part 33 is also restrained low according to the height of the recessed part 71. Therefore, the protrusion dimension after screwing in the tap screw 80 can be reduced.

Further, since the front end position of the boss portion 33 is higher than the front surface position of the concave portion 71 of the cover main body 60, when the screwing of the tap screw 80 is completed, as shown in FIG. While being fixed to the front surface of 33, a gap in the axial direction (front-rear direction) of the boss portion 33 is formed between the ring portion 83 and the concave portion 71 of the cover body 60. Therefore, the seal member holding member 20 is prevented from falling from the back surface of the cover body 60 when the ring portion 83 hits the edge of the insertion hole 73, while the boss portion 33 of the boss portion 33 is formed on the rear surface side of the cover body 60. It will be in the state attached so that movement was possible along an axial direction. Further, since the clearances C1 and C2 are provided between the boss portion 33 and the insertion hole 73 and between the positioning pin 35 and the pin insertion hole 75, the seal member holding member 20 can move in all directions. Will be held in the correct state.

After the seal cover 10 is assembled in this way, as shown in FIG. 8, the seal cover 10 is attached to the opening 91 of the connector 90 provided on the side surface of the device case. When the seal cover 10 is disposed at a predetermined position and the cover body 60 is pressed toward the connector 90 side, the seal member holding member 20 is pushed into the opening 91 while the seal member 25 is crushed and deformed in the circumferential direction. . At this time, since the seal member holding member 20 is held in a state where it can move in all directions, the seal member holding member 20 is fitted to the opening 91 while being centered. The seal member 25 is crushed by the fitting, so that the space between the seal member holding member 20 and the opening 91 is in a watertight state, and water is prevented from entering the connector 90.

Then, the seal cover 10 is fixed to the side surface of the case of the device together with the bracket 93 by passing the bolt through the bolt insertion hole 69A of the mounting plate portion 69 at both ends of the cover body 60 and screwing it into the bolt hole of the bracket 93 of the connector 90. Is done. When fixed in this manner, the straight rear end of the side plate 63 and the straight rear end of the lower plate 65 abut against the front of the connector 90 in order to improve the shielding performance, In the portion 77, a gap is formed between the cover main body 60 and the connector 90. In addition, a gap is provided between the upper plate portion 67 and the connector 90 to avoid bending of the notch 79 and the connector 90.

When water is applied onto the seal cover 10 with the seal cover 10 being attached to the opening 91 of the connector 90 in this way, the water from the gap between the upper plate portion 67 and the connector 90 or the notch 79. Invades. As indicated by an arrow R in FIG. 8, the water that has entered from above passes through the outer peripheral surface of the peripheral wall portion 31 of the seal cover holding member 20 and accumulates between the lower plate portion 65 and the connector 90. The accumulated water is discharged from a drain hole 77 in the vicinity of the approximate center of the lower plate portion 65.

In this manner, even if water enters the gap between the upper plate portion 67 and the connector 90 or the notch portion 79, the water is discharged from the drain hole 77 provided between the lower plate portion 65 and the connector 90. Therefore, it does not stay in the seal cover 10.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiment described with reference to the above description and drawings, and for example, the following embodiments are also included in the technical scope.
(1) In the above embodiment, the notch 79 is provided, but it may not be provided.

(2) In the above embodiment, in the tap screw 80, the ring portion 83 is provided integrally with the head 81. However, a washer may be inserted into a normal tap screw and screwed.

(3) In the above embodiment, the seal cover 10 covers the opening 91 of the connector 90, but the opening provided in the case may be directly covered instead of the connector.

(4) In the above embodiment, the interlock connector 40 is provided, but it may not be provided.

DESCRIPTION OF SYMBOLS 10 ... Seal cover 20 ... Seal member holding member 21 ... Fitting part 23 ... Fixing part 31 ... Peripheral wall part 33 ... Boss part 35 ... Positioning pin 37 ... Discharge part 60 ... Cover main body 61 ... Front board part (opposite board part)
63 ... side plate (peripheral plate)
65 ... Lower plate part (other peripheral plate part)
67 ... Upper plate (one peripheral plate)
71 ... Recess 73 ... Insertion hole 75 ... Pin insertion hole 77 ... Drain hole 79 ... Notch 80 ... Tap screw 90 ... Connector (case)
91 ... opening

Claims

A seal cover for covering a work opening provided in a case of an electrical device,
A cover body that covers the opening of the case and is attached to a surface of the case;
A seal member holding member that is fitted to the outer peripheral surface, and is fitted with a seal member that can be fitted into the opening and is watertight to the inner peripheral surface of the opening;
The cover body is composed of a counter plate portion that faces the seal member holding member, and a peripheral plate portion that protrudes and contacts the case side from the periphery of the counter plate portion,
One peripheral plate portion is provided with a gap between the case, while the other peripheral plate portion is provided with a drain hole between the case and the seal of the electric device. cover.
The seal cover is attached to a side surface of the case;
2. The peripheral plate portion provided with a gap between the case and the case is disposed above, while the peripheral plate portion provided with the drain hole is disposed below. A seal cover for electrical equipment as described in 1.