JP6831298B2 - Duct structure - Google Patents

Description

The present invention relates to a technical field of a duct structure for discharging a fluid flowing from an in-vehicle battery mounted on a vehicle such as an automobile to the outside of the vehicle.

Japanese Unexamined Patent Publication No. 2004-243855

Various vehicles such as automobiles are equipped with in-vehicle batteries for supplying electric power to motors and various electrical components.

In recent years, in particular, vehicles such as EVs (Electric Vehicles) and HEVs (Hybrid Electric Vehicles) have become widespread, and in-vehicle batteries having a high power storage function in these electric-powered vehicles. Is installed.

The in-vehicle battery is provided with a storage case and a battery module stored in the storage case, and the battery module is configured by arranging a plurality of battery cells (secondary batteries) such as a nickel hydrogen battery and a lithium ion battery, for example. Has been done.

Further, in some in-vehicle batteries mounted on electric vehicles and the like, a plurality of battery modules are arranged in a storage case in order to maintain a high power storage function.

In such an in-vehicle battery, if an abnormality such as a short circuit should occur in the battery module arranged inside the storage case, there is a possibility that unnecessary gas may be ejected to drive the battery module. is there. Further, in the case of an in-vehicle battery, it is also necessary to cool the battery module or the like and discharge the cooling air whose temperature has risen.

Therefore, for vehicles equipped with an in-vehicle battery, in order to cool the duct structure and battery module for discharging gas to the outside of the vehicle in case of gas ejection, and to discharge the cooled air whose temperature has risen to the outside of the vehicle. Is provided with a duct structure (see, for example, Patent Document 1).

By the way, since the duct structure as described above is a structure that discharges gas and cooling air to the outside of the vehicle, it is inserted through an insertion hole formed in the floor panel and a part of the duct structure is arranged outside (lower side) of the vehicle body from the floor panel. Often done.

Therefore, there is a possibility that moisture, mud, pebbles, and other scattered matter (foreign matter) that bounce off while the vehicle is running may collide with the duct structure, but the duct structure will not fall off from the floor panel even if such scattered matter collides. Must be done. In addition to such a collision, pressure such as high-pressure washing water at the time of car washing may be applied to the duct structure, and in this case as well, it is necessary to prevent the duct structure from falling off from the floor panel.

Further, in a vehicle equipped with an in-vehicle battery, a mesh member is provided inside the duct or an undercover covering the duct is provided as in the duct structure described in Patent Document 1. There are some, but in such a structure, there is a problem that the number of parts is large and it hinders the simplification of the structure.

Therefore, an object of the present invention is to overcome the above-mentioned problems and to secure a stable mounting state and simplification of the structure for the floor panel.

First, the duct structure according to the present invention includes a flow duct connected to an in-vehicle battery and a discharge duct connected to the flow duct, and is inserted into an insertion hole formed in a floor panel of a vehicle body. It is a duct structure for discharging the fluid flowing from the vehicle-mounted battery to the outside of the vehicle, and a space on the passenger compartment side of the floor panel is formed as an inner space, and the discharge duct is provided in the flow duct. A connecting portion to be connected and a sealing portion that is brought into close contact with the periphery of the insertion hole in the inner space are provided, and the discharge duct is attached to the floor panel by being engaged with the opening edge of the insertion hole. The attached portion and the connecting portion connected to the connecting portion are provided, the entire flow duct is located in the inner space, and the discharge duct is inserted into the insertion hole. Is connected to the connecting portion in the inner space.

As a result, the seal portion of the flow duct is brought into close contact with the floor panel in the inner space while the joint portion of the discharge duct is connected to the connection portion of the flow duct in the inner space, and the attached portion of the discharge duct is formed. It is attached to the floor panel by engaging with the opening edge of the insertion hole.

Secondly, in the duct structure according to the present invention described above, it is desirable that the discharge duct is provided with a discharge portion having a plurality of discharge holes and an intrusion prevention portion having no opening shape.

As a result, the discharge duct is configured to have a discharge portion in which a discharge hole is formed and an intrusion prevention portion having no opening shape.

Thirdly, in the duct structure according to the present invention described above, it is desirable that at least a part of the inner surface of the intrusion prevention portion is formed as an inclined surface that approaches the discharge portion as it goes downward.

As a result, the foreign matter that has entered the inside of the discharge duct is likely to flow toward the discharge portion along the inclined surface.

Fourth, in the duct structure according to the present invention described above, it is desirable that the lower edge of the discharge hole located at the lowermost position among the plurality of discharge holes coincides with the lower end of the inclined surface.

As a result, there is no portion that blocks the flowing foreign matter between the inclined surface and the discharge hole located at the lowermost position.

Fifth, in the duct structure according to the present invention described above, it is desirable that the thickness of the intrusion prevention portion is thicker than the thickness of the discharge portion.

As a result, the strength of the intrusion prevention portion becomes higher than the strength of the discharge portion.

Sixth, in the duct structure according to the present invention described above, the insertion hole is formed in a non-circular shape, and the outer shape of the portion of the discharge duct to be inserted into the insertion hole is substantially the same as the insertion hole. It is desirable to be formed in.

As a result, the orientation of the discharge duct with respect to the floor panel is determined by the insertion hole.

Seventh, in the duct structure according to the present invention described above, the mounted portion is elastically deformable, and the mounted portion is elastically deformed on the opening edge of the insertion hole on the center side of the insertion hole. It is desirable to be pressed from.

As a result, when the discharge duct is attached to the floor panel, the attached portion is elastically deformed and pressed against the opening edge of the insertion hole.

Eighth, in the duct structure according to the present invention described above, the discharge duct is inserted into the insertion hole in a state of being connected to the flow duct, and when the discharge duct is inserted into the insertion hole, the above-mentioned It is desirable that the attached portion is elastically deformed.

As a result, the discharge duct is attached to the floor panel by being inserted into the insertion hole in a state of being connected to the flow duct, so that it is not necessary to separately attach the flow duct and the discharge duct to the floor panel.

Ninth, in the duct structure according to the present invention described above, it is desirable that the seal portion is elastically deformable and the seal portion is elastically deformed and pressed against the floor panel.

As a result, the seal portion is elastically deformed and pressed against the floor panel while the discharge duct is attached to the floor panel.

According to the present invention, in a state where the joint portion of the discharge duct is connected to the connecting portion of the flow duct in the inner space, the seal portion of the flow duct is brought into close contact with the floor panel in the inner space and the cover of the discharge duct. Since the mounting portion is engaged with the opening edge of the insertion hole and mounted on the floor panel, a stable mounting state on the floor panel and simplification of the structure can be ensured.

2 to 12 show an embodiment of the duct structure of the present invention, and this figure is a perspective view showing a state in which the vehicle-mounted battery and the duct structure are attached to the floor panel. It is a top view which shows the insertion hole. It is a conceptual diagram which shows the arrangement position with respect to the vehicle of a duct structure. It is an exploded perspective view of a duct structure. It is a perspective view which shows the state which the duct structure is attached to the floor panel with the discharge duct as a cross section. It is sectional drawing which shows the state which the duct structure is attached to the floor panel. It is a side view which shows the state which the discharge duct is connected to the flow duct. It is an enlarged sectional view which shows a part of a flow duct. It is a top view of the discharge duct. It is an enlarged sectional view which shows the state which the duct structure is attached to the floor panel. FIG. 5 is a cross-sectional view taken along the line XI-XI of FIG. 10 showing a flow duct. It is sectional drawing which shows the state in the process of inserting a discharge duct into an insertion hole.

Hereinafter, embodiments for carrying out the duct structure of the present invention will be described with reference to the accompanying drawings. The following will explain an example of a duct structure that discharges the gas generated when an abnormality occurs in the battery module or the like from the in-vehicle battery to the outside of the vehicle. However, the duct structure of the present invention can be applied to various duct structures for discharging the fluid flowing from the vehicle-mounted battery. For example, the battery module or the like arranged inside the vehicle-mounted battery is cooled and the temperature rises. It is also possible to apply it to a duct structure that discharges the raised cooling air to the outside of the vehicle.

The vehicle-mounted battery 100 includes a storage case 101 having an internal space formed as a storage space, a battery module (not shown), a high-voltage device, and the like arranged inside the storage case 101 (see FIG. 1). The vehicle-mounted battery 100 is arranged on the floor panel 50 in the luggage compartment of the vehicle.

The floor panel 50 is formed with, for example, an insertion hole 51 through which the duct structure 1 is inserted on the left side of the vehicle-mounted battery 100 (see FIG. 2). The insertion hole 51 is penetrated vertically, and the opening edge 52 is formed as an arc portion 52b in which the portion located on the left side is formed as a curved portion 52a convex to the left and the portion other than the curved portion 52a is formed in an arc shape. There is. The curved portion 52a has a smaller curvature than the arc portion 52b.

The space above the floor panel 50 is the inner space 60 on the indoor side where the vehicle-mounted battery 100 is arranged, and the space below the floor panel 50 is the outer space 61 on the outdoor side.

One rear wheel 200, for example, the left rear wheel 200, is located below the insertion hole 51 (see FIG. 3).

The duct structure 1 has a flow duct 2 and a discharge duct 3, one end of which is connected to the vehicle-mounted battery 1, and a part of which is inserted into the insertion hole 51 (see FIGS. 4 to 7).

The flow duct 2 is made of, for example, a rubber material, and one end thereof is connected to the vehicle-mounted battery 1. A connecting portion 4 is provided at the other end of the flow duct 2.

The connecting portion 4 is formed in a flange shape overhanging outward, and the outer shape and the inner shape are formed in a circular shape (see FIG. 8). The connecting portion 4 is elastically deformable. An annular connecting groove 4a opened inward is formed inside the connecting portion 4. The connecting portion 4 is provided with positioning protrusions 4b, 4b, and 4b at positions on the inner side of the connecting groove 4a at equal intervals in the circumferential direction. It is sufficient that at least one positioning protrusion 4b is provided.

The flow duct 2 is provided with seal portions 5a and 5b protruding from the end surface (lower surface) of the connecting portion 4. The seal portions 5a and 5b are projected in a direction approaching the outer peripheral surface of the connecting portion 4 as they go downward, and are made elastically deformable. The seal portions 5a and 5b are formed in an annular shape and are provided apart from each other in the radial direction. The number of the seal portions 5 is not limited to two, and may be one or three or more.

The discharge duct 3 has a coupling portion 6, a flow portion 7, and attachment portions 8, 8 and 8, and is formed of, for example, a resin material obtained by injection molding (see FIGS. 4 to 7).

The connecting portion 6 is formed in a substantially annular shape with the thickness direction in the vertical direction (see FIGS. 4, 9 and 10). The inner peripheral edge 9 of the connecting portion 6 is formed as an arc-shaped portion 9b in which a portion located on the left side is formed as a curved portion 9a convex to the left and a portion other than the curved portion 9a is formed in an arc shape. The curved portion 9a has a smaller curvature than the arc-shaped portion 9b.

Positioning recesses 6a, 6a, 6a opened outward are formed on the outer peripheral portion of the connecting portion 6 at equal intervals in the circumferential direction. The number of positioning recesses 6a may be the same as the number of positioning protrusions 4b of the connecting portion 4, and at least one of them may be formed. Molding holes 6b, 6b, 6b are formed inside the positioning recesses 6a, 6a, 6a of the joint portion 6, respectively. The molding holes 6b, 6b, 6b are holes formed for molding the mounted portions 8, 8 and 8 by injection molding.

The outer peripheral edge 10 of the connecting portion 6 is formed in an arc shape except for the portions where the positioning recesses 6a, 6a, 6a are formed. Therefore, since the portion of the connecting portion 6 located on the left side of the inner peripheral edge 9 is formed as a curved portion 9a having a curvature smaller than that of the arcuate portion 9b, the width of the left portion including the curved portion 9a in the radial direction is large. It is made larger than the width in the radial direction of the portion including the arcuate portion 9b.

The flow portion 7 is provided so as to project downward from the inner peripheral portion of the coupling portion 6 (see FIGS. 4 to 6). The flow portion 7 is formed in the shape of a vertically long bag opened upward, and is composed of a discharge portion 11 and an intrusion prevention portion 12. The outer shape of the flow portion 7 is formed to be substantially the same as that of the insertion hole 51, and the shape of the substantially upper half portion is slightly smaller than that of the insertion hole 51.

The discharge portion 11 is a portion of the joint portion 6 that protrudes downward from the inner peripheral portion including the curved portion 9a, and is formed in a curved surface shape that is convex outward (to the left). A plurality of discharge holes 13, 13, ... Are formed in the discharge portion 11 at intervals in the vertical direction and the circumferential direction. The discharge holes 13, 13, ... Are formed in a circular shape, for example, except for the discharge hole 13A located at the lowermost position, and the discharge hole 13A located at the lowermost position is formed in a non-circular shape. The discharge hole 13A is formed in a straight line in which the lower edge 13a extends substantially in the front-rear direction, and is continuous with the lower end on the inner surface of the intrusion prevention portion 12.

The intrusion prevention portion 12 is a portion of the joint portion 6 that protrudes downward from the inner peripheral portion including the arcuate portion 9b, and is formed in an arcuate surface shape. The intrusion prevention portion 12 is not formed with an opening shape. The intrusion prevention portion 12 is provided as a non-inclined portion 14 whose upper half portion faces in the horizontal direction, and is provided as an inclined portion 15 in which the lower substantially half portion approaches the discharge portion 11 as it goes downward, and the lower end of the inclined portion 15 is provided. The portion is continuous with the lower end portion of the discharge portion 12. The inner surface of the inclined portion 15 is formed as an inclined surface 15a, and the lower end of the inclined surface 15a is continuous with the lower edge of the discharge hole 13A.

The thickness of the intrusion prevention portion 12 of the flow portion 7 is thicker than that of the discharge portion 11 (see FIGS. 6 and 11). The thickness of the intrusion prevention portion 12 is, for example, 2 mm to 3 mm, and the thickness of the discharge portion 11 is, for example, 1 mm to 2 mm. Therefore, the intrusion prevention unit 12 has a high strength.

The mounted portions 8, 8 and 8 project from the positions near the upper end of the flowing portion 7 in the directions toward the forming holes 6b, 6b and 6b of the connecting portion 6, respectively (see FIGS. 4 and 6). The attached portions 8, 8 and 8 are provided at equal intervals in the circumferential direction of the flow portion 7.

The attached portion 8 is elastically deformable. An engaging claw 8a projecting upward is provided at the upper end of the attached portion 8, and the engaging claw 8a projects upward from a substantially half portion on the flow portion 7 side in the thickness direction of the attached portion 8. ..

The discharge duct 3 is connected to the flow duct 2, and the discharge duct 3 is connected to the flow duct 2 to form the duct structure 1 (see FIGS. 6, 7, and 10). The connection of the discharge duct 3 to the flow duct 2 is performed by inserting the joint portion 6 of the discharge duct 3 into the connecting groove 4a of the flow duct 2 and fitting the joint portion 6 to the connecting portion 4. .. When the connecting portion 6 is connected to the connecting portion 4, the positioning protrusions 4b, 4b, and 4b of the connecting portion 4 are fitted into the positioning recesses 6a, 6a, and 6a of the connecting portion 6, respectively, for the flow of the discharge duct 3. Positioning in the circumferential direction with respect to the duct 2 is performed.

In a state where the discharge duct 3 is connected to the flow duct 2 to form the duct structure 1, the discharge duct 3 is inserted into the insertion hole 51 of the floor panel 50 from above (see FIG. 12). At this time, in the discharge duct 3, the discharge portion 11 and the intrusion prevention portion 12 of the flow portion 7 are inserted into the insertion hole 51 in the directions corresponding to the curved portion 52a and the arc portion 52b, respectively.

When the discharge duct 3 is inserted into the insertion hole 51 and moved downward, the attached portions 8, 8 and 8 are each slid on the opening edge 52 of the insertion hole 51 and elastically deformed in a direction approaching the flow portion 7. Will be done. When the discharge duct 3 is further moved downward with respect to the insertion hole 51, the engaging claws 8a, 8a, 8a of the attached portions 8, 8 and 8 become at the same height as the insertion hole 51, and the attached portion becomes 8, 8 and 8 are elastically restored and the engaging claws 8a, 8a and 8a are engaged with the opening edge 52 (see FIGS. 6 and 10).

At this time, the attached portions 8, 8 and 8 are elastically deformed from the original state before the discharge duct 3 is inserted into the insertion hole 51, and are pressed against the opening edge 52 from the center side of the insertion hole 51. Is attached to the floor panel 50.

Therefore, when the discharge duct 3 is attached to the floor panel 50, the attached portions 8, 8 and 8 are elastically deformed and pressed against the opening edge 52 of the insertion hole 51, so that the floor panel of the discharge duct 3 is pressed. A stable mounting state with respect to 50 can be ensured.

As described above, the duct structure 1 is attached to the floor panel 50 by engaging the attached portions 8, 8 and 8 of the discharge duct 3 with the opening edge 52 of the insertion hole 51, and the flow duct 2 is the whole. Is located in the inner space 60, and the upper end of the discharge duct 3 including the joint portion 6 is located in the inner space 60.

As described above, the discharge duct 3 has an outer shape of the flow portion 7 having substantially the same shape as the insertion hole 51 having a curved portion 52a and an arc portion 52b and formed in a non-circular shape.

Therefore, in the discharge duct 3, the flow portion 7 formed in a non-circular shape having substantially the same shape as the insertion hole 51 is inserted into the non-circular insertion hole 51, so that the floor panel of the discharge duct 3 is inserted through the insertion hole 51. The orientation with respect to 50 is determined, and the discharge unit 11 is attached to the floor panel 50 in the orientation on the left side and the intrusion prevention unit 12 on the right side.

In this way, the duct structure 1 is discharged when the discharge duct 3 is inserted into the insertion hole 51 because the direction of the discharge duct 3 with respect to the floor panel 50 is determined by the insertion hole 51 by inserting the flow portion 7 into the insertion hole 51. The duct 3 can be easily and surely attached to the floor panel 50 in a predetermined orientation.

When the duct structure 1 is attached to the floor panel 50, the sealing portions 5a and 5b of the flow duct 2 are pressed from above against the peripheral portion 50a of the insertion hole 51 in the floor panel 50. At this time, the seal portions 5a and 5b are elastically deformed so as to be in close contact with the portion 50a (see FIG. 10).

Therefore, when the discharge duct 3 is attached to the floor panel 50, the seal portions 5a and 5b are pressed against the peripheral portion 50a of the insertion hole 51 in the floor panel 50 in a state of being elastically deformed, so that the seal portions 5a and 5b are pressed. High adhesion to the floor panel 50 is ensured, and foreign matter such as moisture, mud, and snow can be reliably prevented from entering the inner space 60 from the insertion hole 51.

In particular, foreign matter must enter between the flow portion 7 of the discharge duct 3 and the opening edge 52 of the insertion hole 51 from below and pass through a path (see the arrow in FIG. 10) that turns to the seal portions 5a and 5b. For example, since it is not possible to enter the inner space 60, the entry path of the foreign matter into the inner space 60 is maze-like. Therefore, in the duct structure 1, it is possible to reliably prevent foreign matter from entering the inner space 60 even by the so-called labyrinth effect.

Further, in the duct structure 1, as described above, the discharge duct 3 is inserted into the insertion hole 51 in a state where the flow duct 2 and the discharge duct 3 are connected, and the insertion hole 51 of the discharge duct 3 is inserted. The attached portions 8, 8 and 8 are elastically deformed at the time of insertion into the duct.

Therefore, since the discharge duct 3 is attached to the floor panel 50 by being inserted into the insertion hole 51 in a state of being connected to the flow duct 2, the flow duct 2 and the discharge duct 3 are separately connected to the floor panel 50. It is not necessary to attach the duct structure 1, and workability in the attachment work of the duct structure 1 to the floor panel 50 can be improved.

In the state where the duct structure 1 is attached to the floor panel 50 as described above, if an abnormality such as a short circuit should occur in the in-vehicle battery 1, gas may be generated, but the generated gas is a flow duct. It is flowed from 2 to the discharge duct 3, and is discharged to the outside of the vehicle through the discharge holes 13, 13, ... Of the discharge duct 3.

On the other hand, while the vehicle is running, splashing water and scattered matter (foreign matter) such as mud and pebbles collide with the discharge duct 3, and while the vehicle is being washed, foreign matter such as water collides with the discharge duct 3. However, these foreign substances may enter the inside of the discharge duct 3 through the discharge holes 13, 13, ....

In this way, foreign matter may enter the inside of the discharge duct 3 through the discharge holes 13, 13, ... While the vehicle is running or cleaning, but the discharge duct 3 is the inner surface of the intrusion prevention unit 12. At least a part of the above is formed as an inclined surface 15a that approaches the discharge portion 11 as it goes downward.

Therefore, the foreign matter that has entered the inside of the discharge duct 3 can be easily flowed toward the discharge portion 12 along the inclined surface 15a, and the foreign matter can be smoothly and quickly discharged from the discharge holes 13, 13, .... It is possible to prevent the gas discharge path from being blocked.

Further, in the discharge duct 3, the lower edge 13a of the discharge hole 13A located at the lowermost position among the discharge holes 13, 13, ... Is coincident with the lower end of the inclined surface 15a.

Therefore, since there is no portion between the inclined surface 15a and the discharge hole 13A to block the flowing foreign matter, the foreign matter flowing along the inclined surface 15a is surely discharged from the discharge hole 13A.

Also. Since the inclined portion 15a is formed in the discharge duct 3, the gas that may be generated in the vehicle-mounted battery 1 is guided by the inclined portion 15a and flows to the discharge portion 11 side, so that the gas has a simple structure. Can be flowed in a desired direction and discharged.

The discharge holes 13, 13, ... Are formed to have a predetermined size, and even if a small animal should enter below the floor panel 50, the small animal cannot enter the inside of the discharge duct 3. Has been made. Further, the total opening area of the discharge holes 13, 13, ... Is sized in consideration of the amount of gas generated in the vehicle-mounted battery 1, so that the gas can be sufficiently discharged to the outside of the vehicle. It has been sought after.

Further, while the vehicle is running, pebbles and the like may be flipped up by the rear wheels 200, and the flipped up pebbles and the like may collide with the discharge duct 3, but the pebbles and the like are flipped up from the inside of the rear wheels. (Refer to the arrow in FIG. 3) It often collides with the discharge duct 3.

Therefore, as described above, the discharge duct 3 is provided with the discharge portion 11 having the discharge holes 13, 13, ... And the intrusion prevention portion 12 having no opening shape, so that the discharge portion 11 is provided with pebbles or the like. By attaching the discharge duct 3 to the floor panel 50 in a direction in which pebbles or the like easily collide with the intrusion prevention portion 12, it is possible to prevent pebbles or the like from invading the inside of the discharge duct 3.

Further, since the discharge duct 3 is provided with the discharge unit 11 and the intrusion prevention unit 12, the discharge duct 3 does not have an opening shape with the discharge unit 11 in which the discharge holes 13, 13, ... Are formed. Since the configuration includes the prevention unit 12, the gas flowing from the vehicle-mounted battery 1 and the foreign matter that has entered the inside of the discharge duct 3 can be discharged in a desired direction depending on the direction of the discharge duct 3.

In particular, since the gas generated in the vehicle-mounted battery 1 has a high temperature, the gas discharge direction is set to a desired direction according to the direction of the discharge duct 3, so that the structure located under the floor panel 50 is located. It is possible to prevent melting and deterioration of function.

Further, in the discharge duct 3, since the discharge holes 13, 13, ... Are formed in the discharge unit 11 and the intrusion prevention part 12 does not have an opening shape, foreign matter does not enter from the intrusion prevention part 12. , It is possible to reduce the intrusion of foreign matter into the inside of the discharge duct 3.

Furthermore, since the thickness of the intrusion prevention unit 12 of the discharge duct 3 is thicker than the thickness of the discharge unit 11, the strength of the intrusion prevention unit 12 is higher than the strength of the discharge unit 11, and pebbles, mud, water, etc. are scattered. It is possible to reduce the occurrence of damage or damage to the intrusion prevention unit 12 when an object collides with the intrusion prevention unit 12.

As described above, in the duct structure 1, the entire flow duct 2 is located in the inner space 60, and the attached portion 8 is in a state where a part of the discharge duct 3 is inserted into the insertion hole 51. 8 and 8 are attached to the floor panel 50, and the connecting portion 6 is connected to the connecting portion 4 in the inner space 60.

Therefore, the sealing portions 5a and 5b of the flow duct 2 are brought into close contact with the floor panel 50 in the inner space 60 in a state where the joint portion 6 of the discharge duct 3 is connected to the connecting portion 4 of the flow duct 2 in the inner space 60. In addition, since the mounted portions 8, 8 and 8 of the discharge duct 3 are engaged with the opening edge 52 of the insertion hole 51 and mounted on the floor panel 50, a stable mounting state on the floor panel 50 and simplification of the structure can be achieved. Can be secured.

In particular, it is not necessary to provide a mesh member or an undercover around the discharge duct 3 to prevent foreign matter from entering the inside of the discharge duct 3, so that the structure can be simplified and the manufacturing cost can be reduced. it can.

Further, the entire flow duct 2 is located in the inner space 60, the connecting portion 6 of the discharge duct 3 connected to the connecting portion 4 is located in the inner space 60, and the sealing portions 5a and 5b are in close contact with the floor panel 50. Therefore, the pressure from the high-pressure washing water and the impact from foreign matter such as pebbles are not directly applied to the connecting portion 4 and the connecting portion 6, and the discharge duct 3 falls off from the flow duct 2. Can be prevented.

Further, since it is possible to prevent the discharge duct 3 from falling off from the flow duct 2, it is difficult for the discharge duct 3 to be displaced from the floor panel 50, and the discharge duct 3 is stably attached to the floor panel 50. The state is ensured, and it is possible to prevent the discharge duct 3 from falling off from the floor panel 50.

Although the duct structure 1 is arranged on the left rear side of the vehicle and the discharge duct 3 is set in the direction in which the discharge unit 11 is located on the left side of the intrusion prevention unit 12, the duct structure 1 is shown above. The arrangement position of the structure 1 and the orientation of the discharge duct 3 can be set to any arrangement position and orientation according to, for example, the arrangement position of the vehicle type, the vehicle-mounted battery 1 with respect to the vehicle body, the structure of the vehicle, and the like.

100 ... Vehicle battery, 50 ... Floor panel, 51 ... Insertion hole, 52 ... Opening edge, 60 ... Inner space, 1 ... Duct structure, 2 ... Flow duct, 3 ... Discharge duct, 4 ... Connecting part, 5a ... Seal part, 5b ... Seal part, 6 ... Joint part, 8 ... Attached part, 11 ... Discharge part, 12 ... Intrusion prevention part, 13 ... Discharge hole, 13A ... Discharge hole, 13a ... Lower edge, 15a ... Inclined surface

Claims (9)

The vehicle is provided with a flow duct connected to the vehicle-mounted battery and a discharge duct connected to the flow duct, and is inserted into an insertion hole formed in the floor panel of the vehicle body to flow fluid from the vehicle-mounted battery. It is a duct structure that discharges to the outside of
The space on the passenger compartment side of the floor panel is formed as an inner space.
The flow duct is provided with a connecting portion to which the discharge duct is connected and a sealing portion that is brought into close contact with the periphery of the insertion hole in the inner space.
The discharge duct is provided with a mounted portion that is attached to the floor panel by engaging with the opening edge of the insertion hole and a connecting portion that is connected to the connecting portion.
The entire flow duct is located in the inner space.
The discharge duct has a duct structure in which the connecting portion is connected to the connecting portion in the inner space while being inserted into the insertion hole. The duct structure according to claim 1, wherein the discharge duct is provided with a discharge portion having a plurality of discharge holes and an intrusion prevention portion having no opening shape. The duct structure according to claim 2, wherein at least a part of the inner surface of the intrusion prevention portion is formed as an inclined surface that approaches the discharge portion as it goes downward. The duct structure according to claim 3, wherein the lower edge of the discharge hole located at the lowermost position among the plurality of discharge holes coincides with the lower end of the inclined surface. The duct structure according to claim 2, claim 3 or claim 4, wherein the thickness of the intrusion prevention portion is made thicker than the thickness of the discharge portion. The insertion hole is formed in a non-circular shape,
The first, second, third, fourth, or fifth aspect of the discharge duct, wherein the outer shape of the portion to be inserted into the insertion hole is formed to have substantially the same shape as the insertion hole. Duct structure. The attached portion is elastically deformable,
Claim 1, claim 2, claim 3, claim 4, claim 5 or claim 6 in which the attached portion is elastically deformed and pressed against the opening edge of the insertion hole from the center side of the insertion hole. The duct structure described in. The discharge duct is inserted into the insertion hole in a state of being connected to the flow duct.
The duct structure according to claim 7, wherein the attached portion is elastically deformed when the discharge duct is inserted into the insertion hole. The seal portion is elastically deformable,
The first, claim 2, claim 3, claim 4, claim 5, claim 6, claim 7 or claim 8 where the seal portion is elastically deformed and pressed against the floor panel. Duct structure.

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