JP2012126267A - Plug cover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug cover device, capable of suppressing increase in the cost by employing a simple configuration, limiting access to a service plug and securing waterproof property.SOLUTION: The plug cover device 18 has: a boot member 30 in which a service plug mounted in a battery unit of an electric vehicle is included; and a plug cover 20 to close an opening 37 formed in the boot member 30 for operating the service plug. The plug cover 20 has: a cover body 21 having an engaging part 23 made of an elastic member and to be engaged and tightly adhering to the boot member 30; a plate-like member 22 mounted as a shape holding member for the cover body 21 and formed with a member that is harder than the cover body 21; and a bolt hole 25 formed in an integrated part in which the cover body 21 and the plate-like member 22 are integrated, and for fastening and fixing the cover body 21 to the boot member 30 with a fastening bolt 26.

Description

  The present invention relates to a plug cover device that covers a service plug mounted on a battery unit of an electric vehicle.

  A battery unit used in an electric vehicle includes a plurality of batteries, a battery case that houses the batteries, and the like. The battery case structure includes, for example, a tray member that supports the battery, a cover member that covers the upper portion of the tray member, and the like. The tray member and the cover member include the peripheral portion of the tray member and the peripheral portion of the cover member. Are joined by a plurality of bolts and nuts.

In addition, for example, as disclosed in Patent Document 1, before removing the battery unit from the vehicle body during maintenance of the battery unit, the battery unit is disconnected from the power source by cutting off the series circuit of the plurality of batteries. Some have a service plug for power shutdown that can ensure safety.
In the electric vehicle described in Patent Document 1, openings (holes) are respectively formed in the battery case and the floor panel of the vehicle body, and elastically deformable and waterproof boot members arranged between these openings are respectively provided. By fixing to the opening, the service plug operation lever can be operated from the vehicle interior side. In other words, the opening formed in the floor panel and the battery case is connected by the boot member having waterproofness, thereby connecting the vehicle interior and the battery case to ensure waterproofness.

JP 2009-83601 A

  However, in the structure described in Patent Document 1, the floor panel of the vehicle body and the battery case are connected and directly connected by the boot member, and the service plug is not exposed to the outside air using only the boot member. Although it has a structure, if the battery case cannot be directly connected to the floor panel due to the structure of the vehicle, that is, the positional relationship between the floor panel and the battery case, the above structure cannot be adopted. Moreover, the case where the battery case is provided separately from the floor panel may be more preferable from the viewpoint of rigidity and vehicle body strength.

Therefore, when the battery case and the floor panel are provided separately, it is necessary to provide a sealing property to the cover that closes the opening formed in the battery case to ensure the waterproof property. In addition, for the management of the battery unit, it is desirable that the opening formed in the battery case can be opened and closed using a specific tool.
The present invention has been devised in view of such problems, and a plug cover device capable of suppressing cost increase with a simple configuration, restricting access to a service plug, and ensuring waterproofness. The purpose is to provide.

  In order to solve the above-described problems, a plug cover device according to the present invention includes a boot member in which a service plug installed in a power source of an electric vehicle is installed, and an opening formed in the boot member for operating the service plug. A plug cover device having a plug cover for closing the portion, wherein the plug cover is formed of an elastic member and has a cover main body having an engaging portion that is in close contact with the boot member, and the shape of the cover main body is maintained. A plate-like member that is equipped as a member and is made of a member that is harder than the cover body, and is formed in a superposed portion where the cover body and the plate-like member are superposed, and the cover body is attached to the boot member by a fastening bolt And a bolt hole for fastening and fixing.

Further, the service plug has an operation lever capable of electrically disconnecting a battery mounted on the battery unit, and the plug cover is formed on the cover body, and has a protruding portion protruding toward the operation lever. It is preferable to have.
Moreover, it is preferable that the said engaging part is provided in the peripheral part of the said cover main body, and the said plate-shaped member is equipped in the location which is an intermediate part of the said cover main body and does not overlap with the said engaging part.

Moreover, it is preferable that the said superimposition part protrudes to the outer side of the said cover main body.
At this time, it is more preferable that the overlapping portion protrudes in only one direction of the cover body.

  According to the plug cover device of the present invention, since the cover main body of the plug cover and the boot member are engaged and brought into close contact with each other at the engaging portion, the waterproofness of the plug cover can be ensured. Moreover, since the cover main body has a plate-like member as a shape-retaining member and a bolt hole that is fastened and fixed to the boot member with a fastening bolt, the rigidity of the entire plug cover can be increased, and the fastening bolt If the plug is not removed, the plug cover cannot be removed. Therefore, access to the service plug can be appropriately restricted.

It is a typical exploded perspective view explaining the structure of the plug cover device concerning one embodiment of the present invention. FIG. 2A is a schematic overall perspective view of a plug cover device according to an embodiment of the present invention, and FIG. 2B is a schematic perspective view illustrating the structure of the plug cover. 3A is a cross-sectional view taken along the line AA in FIG. 2A, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. It is a typical whole perspective view of the battery unit to which the plug cover apparatus concerning one Embodiment of this invention was applied. It is a typical exploded perspective view explaining the mounting structure of the battery unit to which the plug cover device concerning one embodiment of the present invention was applied.

Hereinafter, embodiments will be described with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment.
The plug cover device according to the present embodiment will be described with reference to FIGS. The plug cover device covers a service plug mounted on a battery unit mounted on an electric vehicle including a hybrid electric vehicle, and is suitable for use in an environment where waterproofness is required. In the following description, it is assumed that the traveling direction of the electric vehicle is the front, the left and right are determined with reference to the front, the direction of gravity is the lower side, and vice versa. Further, a description will be given assuming that the side toward the center of the battery case is the inside and the opposite is the outside.

  As shown in FIG. 5, the electric vehicle 1 includes a traveling motor and a charging device (both not shown) disposed behind the vehicle body 2, a battery unit 5 disposed below the floor of the vehicle body 2, and the like. ing. Further, a floor panel 3 is provided above the battery unit 5, and a front seat 4F and a rear seat 4R are disposed above the floor panel 3, that is, in the passenger compartment.

  The floor panel 3 is formed of, for example, a sheet metal, and extends in the front-rear direction and the left-right direction of the vehicle body 2 and constitutes a floor portion of the vehicle body 2. The floor panel 3 is fixed to a predetermined position of a frame structure including a side member (not shown) constituting the vehicle body 2 by welding or the like. The battery unit 5 is disposed below the floor panel 3 and separated from the floor panel 3. An under cover 6 is disposed below the battery unit 5 and is fixed to a frame structure or the like.

  As shown in FIG. 4, the battery unit 5 is configured by accommodating a plurality of batteries, electronic components, and the like (not shown) inside a battery case 10. The battery case 10 includes a resin tray member 11 that supports a battery and the like, a resin cover member 12 that is superimposed on the tray member 11 and coupled to and fixed to the tray member 11, and a lower surface of the tray member 11. And a support member 13 that supports the tray member 11 from below.

  The tray member 11 and the cover member 12 are made of, for example, fiber reinforced resin (FRP) that is mixed with a fiber such as glass fiber as a reinforcing material to improve strength and rigidity and has electrical insulation. Further, the support member 13 is made of a metal material (for example, a steel plate) having sufficient strength to support the load of the entire battery case 10. A tray-side flange portion 11 </ b> F protrudes outward from the upper end of the peripheral wall along the horizontal direction at the peripheral edge of the upper end of the peripheral wall of the tray member 11. The tray side flange portion 11 </ b> F is continuously provided over the entire circumference of the tray member 11. Further, a cover-side flange portion 12 </ b> F is continuously provided over the entire periphery of the cover member 12 at the peripheral edge portion of the lower end of the cover member 12.

  A gasket (not shown) is interposed between the tray side flange portion 11F and the cover side flange portion 12F. The tray member 11 and the cover member 12 join the tray side flange portion 11F and the cover side flange portion 12F while compressing and deforming the gasket, and are fastened by a joining member having a plurality of bolts and nuts (not shown). The battery case 10 is sealed.

  The tray member 11 and the cover member 12 are each integrally formed by injection molding (injection molding). Injection molding is the most common resin molding method, and engraves the product shape in a mold composed of a cavity (concave mold) and a core (convex mold), and is heated and melted in a molding machine. This is a method in which a raw material is injected into a mold at a high pressure and molded. The tray member 11 and the cover member 12 are formed by adding reinforcing fibers to a resin raw material.

  The support member 13 includes a plurality of (here, four) width direction support portions 13W extending in the width direction (short direction) of the tray member 11 and a direction orthogonal to the width direction support portion 13W (that is, the tray member 11 A plurality of (in this case, two) longitudinal support portions 13L that extend in the longitudinal direction and connect these width direction support portions 13W. The width direction support portions 13W and the longitudinal direction support portions 13L are so-called. It is configured in the shape of a well beam. Both end portions of the plurality of width direction support portions 13W and the front end portion of the longitudinal direction support portion 13L protrude outward from the peripheral wall of the tray member 11, and the projecting both end portions and front end portion are respectively fixed to the frame structure. The fixed portion 13F is provided.

  The battery accommodated in the battery case 10 is, for example, one in which a plurality of battery cells formed of lithium ion batteries are connected in series and integrated. As a result, a high voltage circuit serving as a power source for driving and driving is formed. The battery unit 5 is equipped with a service plug 14 (see FIGS. 3A and 3B) for electrically disconnecting the battery by interrupting the high voltage circuit. The service plug 14 is closed when the plug body 16 for short-circuiting is inserted into the base member 15 of the service plug 14, and the circuit is opened when the plug body 16 is removed from the base member 15. Thus, a high voltage circuit is constructed.

  An operation lever 17 is rotatably supported on the plug body 16, and the short-circuit terminal provided on the plug body 16 is provided on the base member 15 by rotating the operation lever 17 in the tilting direction. The high voltage circuit is energized (shown by a solid line in FIG. 3A). On the other hand, by rotating the operation lever 17 in the raising direction, the short-circuit terminal of the plug body 16 is disconnected from the circuit terminal of the base member 15 and the high voltage circuit is cut off [the operation lever in FIG. The state during rotation of 17 is indicated by a two-dot chain line].

As shown in FIG. 4, an opening 12a [see FIGS. 3 (a) and 3 (b)] for operating the service plug 14 from the outside is formed on the upper surface of the cover member 12 of the battery case 10. A plug cover device 18 is provided in the opening 12a. Here, a plug cover device 18 is provided on the left front side of the battery case 10.
Next, the plug cover device 18 will be described with reference to FIGS. 1 to 3B. 1 to 3B, the plug cover device 18 includes a boot member 30, a plug cover 20 that closes an opening 37 formed in the boot member 30, and the boot member 30 as a cover member 12. And an attachment member 40 for attachment.

  The boot member 30 is a member that houses the service plug 14 provided in the battery unit 5, and, like the tray member 11 and the cover member 12, for example, fibers such as glass fibers are mixed as a reinforcing material to improve strength and rigidity. It is made of fiber reinforced resin (FRP) and is integrally formed by injection molding. When the boot member 30 is attached to the cover member 12, the boot member 30 is engaged with the boot body 31 erected vertically upward from the upper surface of the cover member 12, the support portion 32 that supports the boot member 30, and the plug cover 20. A boot side engaging portion 33 to be joined and a boot side fastening portion 34 to be fastened to the plug cover 20 are provided.

  The boot body 31 is formed in a cylindrical shape having an opening 37 for operating the service plug 14, and both the boot body 31 and the opening 37 have arcuate corners at the four corners in a top view. It is a rounded rectangle. The opening 37 is formed larger than the opening 12a formed in the cover member 12, covers the opening 37, and communicates the inside and the outside of the battery case 10.

  As shown in FIG. 1, the support portion 32 protrudes outward along the horizontal direction from the end portion (that is, the lower end) of the boot body 31 on the cover member 12 side, and is formed on the upper surface of the cover member 12. It abuts and supports the boot member 30. The support portion 32 is provided continuously over the entire circumference of the boot body 31 and is formed thicker than the boot body 31. In addition, two attachment bag nuts 43 are embedded in each of the longitudinal support portions 32L extending in the longitudinal direction of the support portion 32 so that the attachment bolts 42 are screwed from the lower surface of the support portion 32. It has become. Further, a boss portion 38 is formed as a downwardly projecting positioning protrusion on the lower surface of the longitudinal support portion 32L and between the mounting bag nuts 43. The boss portion 38 is inserted into a fitting hole portion 41c as a positioning hole portion to be described later, thereby positioning the boot member 30 with respect to the mounting member 40. The shape of the positioning protrusion is not limited to this.

  As shown in FIG. 3A, the boot side engaging portion 33 is slightly inward along the horizontal direction from the end portion (that is, the upper end) of the boot body 31 where the support portion 32 is not provided. Projected to By this boot side engaging portion 33, an opening portion 37 ′ (hereinafter referred to as an upper end opening portion) slightly smaller than the opening portion 37 is formed at the upper end of the boot member 30. The boot side engaging portion 33 is continuously provided over the entire circumference of the boot body 31 and is formed with substantially the same thickness as the boot body 31. A cover side engaging portion 23 described later is engaged and brought into close contact with the boot side engaging portion 33.

  As shown in FIG. 1, the boot side fastening portion 34 is provided at a position corresponding to a cover side fastening portion 24 provided on a cover body 21 of the plug cover 20 described later. Here, it is provided above the side surface where the boot main body 31 is erected, and in the middle portion in the longitudinal direction. The boot side fastening portion 34 is formed with a fastening bolt hole 35 through which a fastening bolt 26 for fastening and fixing the plug cover 20 to the boot member 30 is inserted, and is further screwed into the fastening bolt 26 therein. The fastening bag nut 36 is embedded.

  The attachment member 40 includes a plate-like attachment portion 41 made of sheet metal, an attachment bolt 42, and an attachment bag nut 43. The plate-like attachment portion 41 is attached to the inner surface of the battery case 10, that is, the lower surface of the cover member 12, and the cover member 12 is sandwiched between the plate-like attachment portion 41 and the support portion 32 of the boot member 30. Yes. The plate-like attachment portion 41 is formed so that its outer shape is larger than the outer shape of the support portion 32 of the boot member 30 in a top view. Further, the plate-like mounting portion 41 has a hole 47 formed at the center thereof, and the hole 47 is formed in a substantially rectangular shape whose longitudinal direction is shorter than the opening 37 of the boot member 30 in a top view. Yes. The hole 47 communicates the inside and outside of the battery case 10 together with the opening 12 a formed in the cover member 12 and the opening 37 formed in the boot member 30.

  In addition, the plate-like mounting portion 41 is connected to the mounting bolt hole 41 a through which the mounting bolt 42 is inserted around the hole 47 and the connecting bolt 44 to be connected to the base member 15 of the service plug 14. A bolt hole 41b and a fitting hole 41c into which the boss 38 is fitted are formed. The mounting bolt hole 41a is formed at a position corresponding to the mounting bag nut 43 embedded in the longitudinal support portion 32L of the boot member 30. In addition, two connecting bolt holes 41 b are formed at both ends in the longitudinal direction of the boot member 30. Further, the fitting hole portion 41 c is formed at one location at both ends in the width direction of the boot member 30, and is provided at a position corresponding to the boss portion 38 formed in the longitudinal support portion 32 </ b> L of the boot member 30. In this case, one of the fitting hole portions 41c is a round hole and the other is a long hole, and relative movement of the boot member 30 with respect to the mounting member 40 is allowed, but the shape of the fitting hole portion 41c is It is not limited to this.

  As shown in FIGS. 2A and 2B, the plug cover 20 is provided as a cover main body 21 made of an elastic member such as rubber and a skeleton structure of the cover main body 21. The plate-like member 22 as a shape-holding member made of a member that is elastically hard, that is, hardly elastically deformed (for example, sheet metal), and the overlap portion 29 in which the cover body 21 and the plate-like member 22 are superposed. The cover side bolt hole (bolt hole) 25 is formed in the cover side fastening part 24 provided at a position corresponding to the boot side fastening part 34 of the boot member 30. The plate-like member 22 is not only simply provided with rigidity, but also is a member that is elastically harder than the cover main body 21 and has rigidity. It is a shape holding member.

  The cover main body 21 is formed in a shape corresponding to the shape of the opening 37 of the boot member 30, and here is a rectangle in which the corners of the four corners are rounded in an arc shape when viewed from above. Further, the cover body 21 is formed in a shape larger than the upper end opening 37 ′ of the boot member 30, and has a convex portion 27 that protrudes upward in the middle portion in the longitudinal direction and the width direction, and a boot portion in the peripheral portion. The cover 30 has a cover side engagement portion (engagement portion) 23 that is in close contact with the boot side engagement portion 33 of the member 30. The convex portion 27 is formed in the same shape as the outer shape of the cover main body 21, and has an upper surface 27a extending in the horizontal direction and an inclined portion 27b formed continuously on the outer periphery of the upper surface 27a.

  As shown in FIGS. 3 (a) and 3 (b), the cover side engaging portion 23 is located on the upper surface of the boot side engaging portion 33 when engaged with the boot side engaging portion 33. The engaging portion 23a and the lower engaging portion 23b located on the lower surface of the boot side engaging portion 33 are both tapered. The plug cover 20 and the boot member 30 are in close contact with each other by sandwiching the upper and lower surfaces of the boot side engaging portion 33 between the upper engaging portion 23a and the lower engaging portion 23b of the cover side engaging portion 23, Waterproofness is ensured.

  Further, the cover main body 21 has a protrusion 28 projecting downward on the surface facing the opening 37 when fastened to the boot member 30 (that is, the lower surface of the cover main body 21). In other words, the protruding portion 28 is formed on the surface of the cover body 21 on the boot member 30 side, and protrudes toward the operation lever 17 of the service plug 14 housed in the boot member 30. The protrusion 28 is set to a length that contacts the operation lever 17 at a minimum raising angle α that makes the cut-off state when the operation lever 17 is turned from the energized state in the raising direction. That is, the plug cover 20 cannot be attached to the boot member 30 unless the operation lever 17 is tilted more than the angle α.

  Here, the protrusions 28 are formed at three locations, and are configured to secure the rigidity of the cover body 21 by extending in the width direction with the same thickness as the cover body 21. The shape of the protrusion 28 is not limited to this. Further, since the rigidity of the cover main body 21 is ensured by the plate-like member 22, the protrusion 28 may be provided only at a position where it contacts the operation lever 17, for example. Further, the protruding portion 28 may not be formed.

  As shown in FIGS. 1, 2A, and 2B, the cover-side fastening portion 24 extends outward from the inclined portion 27b extending in the longitudinal direction of the convex portion 27 of the cover body 21 along the horizontal direction. It extends toward the outside and protrudes to the outside of the outer periphery of the cover main body 21. That is, the cover side fastening portion 24 is formed in the overlapping portion 29 that protrudes to the outside of the cover main body 21. Here, the overlapping portion 29 protrudes only in one direction of the cover main body 21.

  Only one cover-side bolt hole 25 for fastening and fixing the cover body 21 to the boot member 30 by one fastening bolt 26 is formed in a portion protruding from the cover body 21 of the cover-side fastening portion 24. Yes. Here, the cover-side bolt hole 25 is formed in an elongated hole larger than the cross-sectional shape of the shaft portion of the fastening bolt 26, but the shape of the cover-side bolt hole 25 is not limited to the elongated hole but is a circle. There may be. The cover side bolt hole 25 communicates with the boot side bolt hole 35 formed in the boot side fastening portion 34 of the boot member 30.

  The plate-like member 22 is built in the cover body 21 and constitutes the skeleton of the cover body 21. In other words, the plate-like member 22 is provided at an intermediate portion in the thickness direction of the cover body 21 so as to be substantially parallel to the upper and lower surfaces of the cover body 21. 2B, the plate-like member 22 extends along the body portion 22a provided at the intermediate portion in the longitudinal direction and the width direction of the cover body 21 and the cover-side fastening portion 24. As shown in FIG. It is comprised from the part 22b. The plate-like member 22 is provided at a location where it does not overlap with the cover side engaging portion 23.

  The main body portion 22a is rectangular in a top view and is built in the upper surface 27a of the convex portion 27 of the cover main body 21. The extending portion 22 b is connected to the longitudinal intermediate portion of the main body portion 22 a, extends in the width direction of the main body portion 22 a, and extends to the tip of the cover side fastening portion 24. A side bolt hole 25 is formed. That is, the cover-side bolt hole 25 is formed in the overlapping portion 29 where the cover-side fastening portion 24 extended from the cover main body 21 and the plate-like member 22 equipped as a shape holding member of the cover main body 21 overlap each other. Yes.

The plug cover device 18 according to the present embodiment is configured as described above, and is attached to the cover member 12 of the battery case 10 as follows.
First, the plate-like mounting portion 41 is coupled to the base member 15 of the service plug 14 by screwing four coupling bolts 44 from above. Next, the support portion 32 of the boot member 30 is disposed on the upper surface of the cover member 12. At this time, the positioning boss 38 is inserted and fitted into the fitting hole 41c, and the boot member 30 is positioned with respect to the mounting member 40. Then, four attachment bolts 42 are inserted from below the plate-like attachment portion 41 attached to the lower surface of the cover member 12 and screwed into an attachment bag nut 43 embedded in the support portion 32, thereby boot member 30. Is fixed to the cover member 12.

  Then, the cover side engaging portion 23 of the plug cover 20 is engaged and brought into close contact with the boot side engaging portion 33 of the boot member 30. At this time, the cover main body 21 is formed of elastic rubber and can be easily deformed. Therefore, the lower engaging portion 23b of the cover side engaging portion 23 is inserted into the lower surface of the boot side engaging portion 33. Thus, the plug cover 20 can be engaged and brought into close contact with the boot member 30.

After the plug cover 20 is attached to the boot member 30, one fastening bolt 26 is screwed into one cover side bolt hole 25 provided in the cover side fastening portion 24, and the plug cover 20 is fastened to the boot member 30. Fix it.
Accordingly, when the battery unit 5 is lowered from the vehicle body during maintenance of the battery unit 5 or the like, first, an opening (not shown) for the service plug 14 provided in the floor panel 3 is opened from the vehicle interior, and below the floor panel 3. The fastening bolts 26 of the plug cover device 18 provided in the battery case 10 arranged in the above are removed using a specific tool. Then, the plug cover 20 is removed, and the operating lever 17 is raised and rotated in the direction to shut off the high voltage circuit.

  Therefore, according to the present plug cover device, the cover main body 21 and the boot member 30 of the plug cover 20 are engaged and brought into close contact with each other at the cover side engaging portion 23 and the boot side engaging portion 33. Sex can be secured. Further, since the cover body 21 has a plate-like member 22 as a shape maintaining member and a cover-side bolt hole 25 that is fastened and fixed to the boot member 30 by a fastening bolt 26, the rigidity of the plug cover 20 as a whole is increased. The plug cover 20 cannot be removed unless the fastening bolt 26 is removed using a specific tool. Therefore, access to the service plug 14 can be appropriately restricted.

  Further, the projection cover 28 formed on the cover body 21 prevents the plug cover 20 from being attached to the boot member 30 unless the operation lever 17 is tilted from the angle α. If is not energized, the plug cover 20 cannot be attached to the boot member 30. Therefore, it is possible to prevent the high voltage circuit from being left in the shut-off state accidentally after performing maintenance or the like of the battery unit 5.

  Moreover, since the cover side coupling | bond part 23 is formed in the peripheral part of the cover main body 21, the peripheral part of the plug cover 20 can be closely_contact | engaged, and waterproofness can be ensured reliably. Further, since the plate-like member 22 is provided on the convex portion 27 formed in the intermediate portion in the longitudinal direction and the width direction of the cover body 21, the cover body 21 is turned from a part of the peripheral edge portion of the cover body 21. The plug cover 20 cannot be opened, and access to the service plug 14 can be appropriately restricted.

  In addition, since the overlapping portion 29 having the cover side fastening portion 24 in which the cover side bolt hole 25 is formed is provided so as to protrude to the outside of the cover main body 21, the strength and waterproofness of the plug cover 20 can be ensured while the cover is secured. Fastening of the main body 21 and the boot member 30 can be performed appropriately. At this time, since the overlapping portion 29 is provided so as to protrude only in one direction of the cover body 21, only one cover-side bolt hole 25 needs to be formed, while ensuring the strength and waterproofness of the plug cover 20, When the plug cover 20 is removed while appropriately restricting access to the service plug 14 by screwing one fastening bolt 26, it can be easily removed using a specific tool.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the plate-like member 22 is built in the cover main body 21 to form a skeleton, but the plate-like member 22 may not be built in the cover main body 21, for example, the cover main body 21. You may adhere | attach on the lower surface of. Moreover, it does not need to be provided in the convex part 27 and may extend to the inclined part 27b.

Moreover, the external shape of the plug cover 20 and the boot member 30 is not limited to a rectangle in a top view, and may be another rectangle or a circle. Further, the shape of the plate-like mounting portion 41 is not limited to the above embodiment, and various shapes can be adopted.
Further, the cover-side engaging portion 23 and the boot-side engaging portion 33 may not be provided only at the peripheral edge portions of the plug cover 20 and the boot member 30, and the plug cover 20 can be engaged and closely attached to the boot member 30. As long as waterproofness can be secured, other shapes may be used.

The cover body 21 is not limited to rubber as long as it is an elastic member, and may be made of resin, for example. The plate-like member 22 is not limited to a sheet metal, and may be a member that is elastically harder than the cover body 21.
Further, the overlapping portion 29 may not be formed so as to protrude only in one direction of the cover main body 21 and may not protrude outward.

Further, the cover side bolt hole 25 is not limited to one, and two or more cover side bolt holes may be provided.
Further, the structure of the battery case 10, that is, the shape and arrangement of the tray member 11, the cover member 12, and the support member 13 are not limited to the above embodiment.

DESCRIPTION OF SYMBOLS 1 Electric vehicle 3 Floor panel 5 Battery unit 10 Battery case 11 Tray member 12 Cover member 14 Service plug 17 Operation lever 18 Plug cover apparatus 20 Plug cover 21 Cover main body 22 Plate-shaped member 23 Cover side engaging part (engaging part)
24 Cover side fastening part 25 Cover side bolt hole (bolt hole)
26 Fastening bolt 28 Protruding portion 29 Superposition portion 30 Boot member 31 Boot body 32 Supporting portion 37 Opening portion 40 Mounting member

Claims (5)

A plug cover device having a boot member in which a service plug installed in a battery unit of an electric vehicle is installed, and a plug cover for closing an opening formed in the boot member for operating the service plug. And
The plug cover is
A cover body having an engaging portion that is made of an elastic member and is in close contact with the boot member;
Equipped as a shape holding member of the cover body, a plate-like member composed of a member harder than the cover body,
A plug cover device, wherein the cover body is formed in a superposed portion where the cover body and the plate-like member are superposed, and has a bolt hole for fastening and fixing the cover body to the boot member with fastening bolts. . The service plug has an operation lever capable of electrically disconnecting a battery installed in the battery unit,
The plug cover device according to claim 1, wherein the plug cover includes a protrusion formed on the cover body and protruding toward the operation lever. The engaging portion is provided on a peripheral portion of the cover body,
3. The plug cover device according to claim 1, wherein the plate-like member is provided in a portion that is an intermediate portion of the cover main body and does not overlap with the engaging portion. The plug cover device according to any one of claims 1 to 3, wherein the overlapping portion protrudes outside the cover main body. The plug cover device according to claim 4, wherein the overlapping portion protrudes in only one direction of the cover main body.

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