JP7019509B2 - Duct structure of battery cooling device - Google Patents

Description

The present invention relates to a duct structure of a battery cooling device.

Hybrid vehicles and electric vehicles are equipped with a battery cooling device that cools the battery, one of the purposes of suppressing deterioration of battery performance. For example, Patent Document 1 discloses a battery cooling device that cools a battery by using air-conditioned air in a vehicle interior. This battery cooling device has a structure in which a first duct portion having an intake port and arranged in the vehicle interior and a second duct portion connected to the battery and arranged outside the vehicle interior are connected. It has a duct. In recent years, hybrid vehicles and electric vehicles have been put into practical use for large vehicles such as sightseeing buses, and such large vehicles also employ a battery cooling device that cools the battery using air-conditioned air in the passenger compartment.

Japanese Unexamined Patent Publication No. 2009-12606

By the way, in the above-mentioned battery cooling device, the connection portion between the first duct portion and the second duct portion is required to be airtight so that the air outside the vehicle interior does not enter the vehicle interior. In a large automobile such as a sightseeing bus, the first duct part is a member fixed to the chassis side to which a battery or the like is connected, and the second duct part is a member fixed to the body side having a passenger compartment or the like. Is. Therefore, a dimensional error is likely to occur between the first duct member and the second duct member. When connecting the first duct part and the second duct part, it is necessary to ensure airtightness while dealing with such dimensional errors, so the work of assembling the first duct part and the second duct part is very difficult. It was complicated.

An object of the present invention is to ensure airtightness at a connection portion between a first duct portion arranged outside the vehicle interior and a second duct portion arranged inside the vehicle interior under easy assembly work. The purpose is to provide a duct structure for a battery cooling device.

The duct structure of the battery cooling device that solves the above problems is the duct structure of the battery cooling device that cools the battery in the accommodation room with the air in the vehicle interior, and is the first duct portion attached to the battery and the accommodation room. The first duct portion having a connection cylinder portion protruding into the vehicle interior through an opening formed in a panel for partitioning the vehicle interior, a first seal member surrounding the connection cylinder portion, and the first seal member. An auxiliary member having a seal cylinder portion that surrounds and presses the first seal member against the connection cylinder portion and a seal flange portion that faces the panel from the passenger compartment side, and between the panel and the seal flange portion. A second seal member that surrounds the opening, a second duct portion that is assembled to the panel from the passenger compartment side, and the second seal via a duct main body portion that surrounds the seal cylinder portion and the seal flange portion. The second duct portion having the pressing flange portion for pressing the member against the panel is provided.

According to the above-mentioned configuration, it is assumed that the auxiliary member is interposed between the first duct portion and the second duct portion, so that a dimensional error occurs between the first duct portion and the second duct portion. However, by assembling the second duct portion to the panel with the first seal member, the second seal member, and the auxiliary member assembled, the airtightness of the vehicle interior is ensured by the first seal member and the second seal member. Will be done. Further, before the second duct portion is assembled to the panel, the positions of the first seal member, the second seal member, and the auxiliary member are adjusted so that the sealability of the first seal member and the second seal member is ensured. This can be done while visually recognizing these members. That is, according to the above configuration, it is possible to secure the airtightness at the connecting portion under easy assembly work while dealing with the dimensional error between the first duct portion and the second duct portion.

The duct structure of the battery cooling device includes a first adhesive layer for adhering the first seal member to the connection cylinder portion or the seal cylinder portion, and a second adhesive for adhering the second seal member to the seal flange portion. It is preferable to have at least one of the layers.

According to the above configuration, when the first adhesive layer is provided, the misalignment of the first seal member when the connecting cylinder portion is inserted into the seal cylinder portion can be suppressed. Further, when the second adhesive layer is provided, the position adjustment of the auxiliary member and the position adjustment of the second seal member can be performed at the same time. As a result, the assembly work can be further simplified.

In the duct structure of the battery cooling device, the seal flange portion is integrally connected to the thin-walled portion with which the second seal member faces and the outer peripheral portion of the thin-walled portion, and the wall is closer to the panel side than the thin-walled portion. It is preferable to have a plurality of thick portions having a large thickness.

According to the above configuration, the thick portion comes into contact with the panel, so that excessive compression of the second seal member can be suppressed. As a result, the gap between the panel and the auxiliary member can be more reliably sealed, and early deterioration of the second sealing member can be suppressed.

The duct structure of the battery cooling device is a positioning bolt fixed to the panel and located outside the seal flange portion of the auxiliary member, and a positioning bolt formed in the second duct portion through which the positioning bolt is inserted. It is preferable to have a hole and a nut to be fastened to the positioning bolt inserted into the positioning hole.

According to the above configuration, by inserting the positioning bolt into the positioning hole, the positioning of the second duct portion with respect to the panel and the mounting work of the bolt for assembling the second duct portion to the panel can be performed at the same time. As a result, the work of assembling the second duct portion to the panel can be further simplified.

In the duct structure of the battery cooling device, the second duct portion is integrally connected to the pressing flange portion and protrudes outward from the seal flange portion of the auxiliary member, and the overhanging piece. It has a spacer connected to and located between the overhanging piece and the panel, and the positioning hole is preferably a hole penetrating the overhanging piece and the spacer.

According to the above configuration, by fastening the positioning bolt and the nut to the position where the spacer abuts on the panel, the seal flange of the auxiliary member can be appropriately pressed by the pressing flange. Moreover, the spacer can be brought into contact with the panel to suppress bending deformation of the overhanging piece. As a result, the nut can be easily fastened to the positioning bolt.

In the duct structure of the battery cooling device, the first duct portion and the second duct portion constitute an intake duct for guiding the air in the vehicle interior to the battery, and the battery cooling device is attached to the panel. The exhaust duct has an exhaust duct for guiding the exhaust which is the air discharged to the passenger compartment through the formed exhaust port, and the exhaust duct is fixed to the first exhaust duct fixed to the battery and the panel. A second exhaust duct that is located on the opposite side of the passenger compartment to the panel and guides the exhaust that has passed through the first exhaust duct to the exhaust port, and the downstream end of the first exhaust duct is inserted. The second exhaust duct is provided with an insertion port to bend the flow direction of the exhaust in the bending direction, and the downstream end portion of the first exhaust duct is located below the portion on the bending direction side. It is preferable to have an upper edge.

According to the above configuration, since the downstream end portion of the first exhaust duct has an upper edge portion located lower toward the portion on the bending direction side, when the second exhaust duct fixed to the panel is assembled to the first exhaust duct. The downstream end of the first exhaust duct can be effectively used as a guide. Further, even if the exhaust gas flowing from the first exhaust duct to the second exhaust duct bends in the bending direction, the downstream end portion of the first exhaust duct is less likely to be an obstacle to the flow of the exhaust gas. As a result, the inflow of exhaust gas from the first exhaust duct to the second exhaust duct can be smoothly performed.

It is a perspective view which shows the schematic structure of one Embodiment of the duct structure of a battery cooling device, and is the perspective view which shows the structure at the rear part of a vehicle omitting the last row seat. An exploded perspective view showing an example of an intake duct. The perspective view which shows an example of the auxiliary member. The figure which shows an example of the adhesive position of the 2nd seal member. It is sectional drawing which shows the example of the connection part of the 1st intake duct and 2nd intake duct schematically, and shows the cross-sectional structure including the thin-walled part and the thick-walled part of an auxiliary member, and the spacer of a 2nd intake duct. Sectional drawing which shows schematically. An exploded perspective view showing an example of an exhaust duct. The figure which shows one of the states in the assembly work of an exhaust duct. The figure which shows the state which the assembly work of the exhaust duct is completed.

An embodiment of the duct structure of the battery cooling device will be described with reference to FIGS. 1 to 8.
As shown in FIG. 1, a vehicle such as a sightseeing bus includes a chassis 11 and a body 21 attached to the chassis 11. The chassis 11 includes a vehicle body frame 15 composed of a side frame 13 and a cross member 14 directly or indirectly connected to the side frame 13, and a drive wheel and an engine attached to the vehicle body frame 15. , Battery 16 and the like. The body 21 has a plurality of panels 23 for partitioning from the chassis 11 and defining a vehicle interior 22 in which a driver's seat, a passenger's seat, and the like are installed. One of the plurality of panels 23 is a rear panel 23b located behind the last row seats (not shown). The other one of the plurality of panels 23 forms a storage chamber 17 in which the engine and the battery 16 are housed below the rearmost row seats, and uses the steering wheel 23h when inspecting the storage room 17 or the like to use the steering wheel 23h on the passenger compartment 22 side. It is an inspection panel 23a that can be removed from. The inspection panel 23a is one of the panels that separates the accommodation chamber 17 and the vehicle compartment 22. Further, the vehicle is provided with a battery cooling device 25 that cools the battery 16 by using the air-conditioned air in the vehicle interior 22 for one purpose of suppressing the deterioration of the performance of the battery 16.

Hereinafter, the battery cooling device 25 will be described. A pair of left and right batteries 16 are arranged in the accommodation chamber 17, and the battery cooling device 25 is provided for each of the pair of batteries 16. The basic configurations of the battery 16 and the battery cooling device 25 are the same except that the mounting positions are different. Therefore, the battery cooling device located on the right side (front side in FIG. 1) with respect to the forward direction will be described in detail, and the battery cooling device located on the left side (back side in FIG. 1) will be described in detail by giving the same reference numerals. Is omitted.

The battery cooling device 25 cools the battery 16 by driving a blower or the like (not shown). The battery cooling device 25 includes an intake duct 30 that guides the conditioned air in the vehicle compartment 22 to the battery 16, and an exhaust duct 70 that guides the exhaust air, which is the air after cooling the battery 16, to the vehicle compartment 22. I have.

The intake duct 30 includes a first intake duct 31 that is connected to the battery 16 and extends upward, and a second intake duct 32 that is assembled to the inspection panel 23a from the vehicle interior 22 side. An air filter 33 that removes foreign matter from the air flowing into the intake duct 30 is attached to the tip of the second intake duct 32. The first intake duct 31 is a first duct portion, and the second intake duct 32 is a second duct portion.

The exhaust duct 70 includes a first exhaust duct 71 connected to the battery 16 and extending upward, and a second exhaust duct 72 connected to the above-mentioned inspection panel 23a. The second exhaust duct 72 is located on the accommodation chamber 17 side with respect to the inspection panel 23a, and its internal space communicates with the vehicle interior 22 through the exhaust port 73 formed in the inspection panel 23a. The assembly work of the inspection panel 23a is performed in a state where the second exhaust duct 72 is assembled.

(Intake duct 30)
As shown in FIG. 2, the intake duct 30 includes, in addition to the first intake duct 31 and the second intake duct 32 described above, an auxiliary member 36 interposed between the first intake duct 31 and the second intake duct 32. ing.

The first intake duct 31 is a molded product such as synthetic resin, and is fixed to the battery 16 and extends upward from the battery 16. The first intake duct 31 has a connecting cylinder portion 31A that projects into the vehicle interior 22 through an opening 34 formed at the rear side outer end portion of the inspection panel 23a. The opening 34 is an opening into which the connecting cylinder portion 31A is loosely inserted, and has an opening shape substantially similar to the cross-sectional shape of the connecting cylinder portion 31A. A first seal member 35 is adhered to the tip end portion of the connection cylinder portion 31A over the entire circumference in the circumferential direction of the connection cylinder portion 31A. The first seal member 35 is an elastic seal member, for example, Eptsealer (registered trademark, manufactured by Nitto Denko KK, foam of EPDM mixture).

As shown in FIGS. 2, 3 and 4, the auxiliary member 36 is manufactured by deforming and joining a metal plate such as aluminum. The auxiliary member 36 includes a seal cylinder portion 37 that surrounds the connection cylinder portion 31A and the first seal member 35 of the first intake duct 31, and a seal flange portion 38 that is connected to the end portion of the seal cylinder portion 37 on the inspection panel 23a side. have. The seal cylinder portion 37 is inserted into the connection cylinder portion 31A so that the first seal member 35 attached to the connection cylinder portion 31A is located inside. The first seal member 35 is appropriately compressed by being sandwiched between the seal cylinder portion 37 of the auxiliary member 36 and the connection cylinder portion 31A of the first intake duct 31, and is between the seal cylinder portion 37 and the connection cylinder portion 31A. Seal the gap. As a result, the auxiliary member 36 is positioned with respect to the first intake duct 31, and air in the accommodation chamber 17 is suppressed from entering the vehicle interior 22 through the gap between the seal cylinder portion 37 and the connection cylinder portion 31A. (See Fig. 5).

The seal cylinder portion 37 may have a shape that is tapered with the connecting portion with the seal flange portion 38 as the base end. According to such a configuration, since the compression of the first seal member 35 is performed at the tip end portion of the seal cylinder portion 37, the seal cylinder portion 37 can be easily inserted into the connection cylinder portion 31A.

The seal flange portion 38 of the auxiliary member 36 has an annular shape, and a plurality of thick-walled portions are integrally connected to the thin-walled portion 39 whose outer peripheral portion is arranged outside the opening 34 and the outer peripheral portion of the thin-walled portion 39. It has a part 40 and. The thin-walled portion 39 has a shape facing the inspection panel 23a over the entire circumference of the first intake duct 31 in a state where the connection cylinder portion 31A is inserted into the seal cylinder portion 37 regardless of the position of the connection cylinder portion 31A. have. A second seal member 41 that seals the gap between the inspection panel 23a and the seal flange portion 38 of the auxiliary member 36 is adhered to the back surface of the thin portion 39 facing the inspection panel 23a. The second seal member 41 is an elastic seal member similar to the first seal member 35, and is, for example, an EPT SEALER (registered trademark, manufactured by Nitto Denko KK, foam of EPDM mixture). In the present embodiment, the thick portion 40 forms each corner of the substantially rectangular annular seal flange portion 38, and the thin portion 40 is on the opposite side of the seal cylinder portion 37 with respect to the seal flange portion 38, that is, on the inspection panel 23a side. It is a part with a wall thickness larger than 39. Each thick portion 40 guides the bonding position of the second seal member 41 and secures a distance between the thin portion 39 and the inspection panel 23a by abutting on the inspection panel 23a, so that the second seal member 41 is excessively thickened. It functions as a regulatory unit that regulates compression. The second seal member 41 is appropriately compressed by the auxiliary member 36 in which each thick portion 40 is in contact with the inspection panel 23a, and seals the gap between the inspection panel 23a and the auxiliary member 36. As a result, air in the accommodation chamber 17 is suppressed from entering the vehicle interior 22 through the gap between the inspection panel 23a and the auxiliary member 36 (see FIG. 5).

As shown in FIG. 2, the second intake duct 32 is manufactured by deforming and joining a metal plate such as aluminum. The second intake duct 32 is connected to the duct main body portion 42 that curves toward the rear surface side of the vehicle and the base end portion of the duct main body portion 42, and presses the seal flange portion 38 of the auxiliary member 36 against the inspection panel 23a. It is provided with a pressing flange portion 43. An air filter 33 is attached to the tip of the duct main body 42 by a fastener (not shown) such as a snap lock. The second intake duct 32 is provided by fastening the assembly nut 48 to the pair of positioning bolts 47 fixed to the inspection panel 23a, and the fastening bolts to the pair of fastening brackets 55 fixed to the inspection panel 23a. When 53 is fastened, it is assembled to the inspection panel 23a.

In the pressing flange portion 43 of the second intake duct 32, a pair of overhanging pieces 44 projecting to the side of the vehicle are integrally connected to the front side ends on both sides in the width direction of the vehicle. The pair of overhanging pieces 44 have a wall thickness of 40 or less for each thick portion of the seal flange portion 38, and a spacer that secures a distance between the overhanging piece 44 and the inspection panel 23a by abutting on the inspection panel 23a. 45 are connected. The overhanging piece 44 and the spacer 45 are formed with a positioning hole 46 through which the pair of positioning bolts 47 described above are inserted.

The pair of positioning bolts 47 extend upward at a position that sandwiches the auxiliary member 36 in the width direction of the vehicle and is closer to the front of the vehicle. The pair of positioning bolts 47 also function as positioning pins for positioning the second intake duct 32, and the pressing flange portion 43 of the second intake duct 32 and the seal flange portion 38 of the auxiliary member 36 are continuous in these circumferential directions. The second intake duct 32 is positioned at a position where it comes into contact with. The second intake duct 32 is partially assembled to the inspection panel 23a by fastening the assembly nut 48 to the pair of positioning bolts 47 inserted into the positioning holes 46. The overhang piece 44 is restricted from bending deformation caused by fastening the pair of positioning bolts 47 and the assembly nut 48 by the spacer 45.

The duct main body 42 of the second intake duct 32 has an assembly bracket 50 at the lower rear side on each of the side surfaces facing the side of the vehicle. Each assembly bracket 50 has an L-shaped angle shape. Each assembly bracket 50 is a set of a fixing piece 51 fixed to the side surface of the duct main body 42 and extending diagonally downward on the rear side of the vehicle, and a set that bends from the tip of the fixed piece 51 to the side of the duct main body 42. It has a piece 52 and. The assembly piece 52 has a bolt insertion hole 54 into which the fastening bolt 53 is inserted, and is a portion to be fastened to the fastening bracket 55 fixed to the inspection panel 23a by the fastening bolt 53.

The fastening bracket 55 is located at a position closer to the rear of the vehicle with respect to the inspection panel 23a so as to sandwich the pressing flange portion 43 of the second intake duct 32 in the width direction of the vehicle. The fastening bracket 55 has an angular shape with an acute bending angle. The fastening bracket 55 is a fixing piece 56 fixed to the inspection panel 23a and extending toward the front of the vehicle, and a female screw portion extending diagonally upward from the front end of the fixing piece 56 to the rear side of the vehicle and to fasten the fastening bolt 53. It has a fastening piece 58 in which a fastening hole 57 is formed. The shape may be such that the welding nut is fixed to the back surface side of the fastening piece 58.

An example of the procedure for assembling the auxiliary member 36 and the second intake duct 32 described above will be described with reference to FIG. The auxiliary member 36 and the second intake duct 32 are in a state where the chassis 11 and the body 21 are connected, and the first intake duct 31 is fixed to the battery 16 and the connection cylinder portion 31A is connected from the opening 34 of the inspection panel 23a. Is assembled from the protruding state. The work of assembling the auxiliary member 36 and the second intake duct 32 is performed using the front side of the vehicle with respect to the connecting cylinder portion 31A, that is, the panel 23c shown in FIG. 1 as a scaffold.

First, the first seal member 35 is adhered to the tip end portion of the connection cylinder portion 31A over the entire circumference in the circumferential direction, and the second seal member 41 is adhered to the back surface of the thin wall portion 39 of the seal flange portion 38. As a result, the first adhesive layer 35a is formed at the boundary portion between the connection cylinder portion 31A and the first seal member 35, and the second adhesive layer is formed at the boundary portion between the pressing flange portion 43 and the second seal member 41. 41a is formed.

Next, the auxiliary member 36 is assembled. In the auxiliary member 36, the seal cylinder portion 37 is inserted into the connection cylinder portion 31A and the first seal member 35 so that the connection cylinder portion 31A and the first seal member 35 are located inside. The auxiliary member 36 is inserted until the second seal member 41 adhered to the seal flange portion 38 comes into contact with the inspection panel 23a. The auxiliary member 36 in which the second seal member 41 is in contact with the inspection panel 23a cooperates with the connection cylinder portion 31A of the first intake duct 31 to appropriately compress the first seal member 35.

Next, the second intake duct 32 is assembled. The air filter 33 may be attached to the second intake duct 32 before the second intake duct 32 is assembled to the inspection panel 23a, or the second intake duct 32 may be attached to the inspection panel 23a. It may be attached to 32.

In the second intake duct 32, the duct main body portion 42 is inserted into the seal cylinder portion 37 so that the seal cylinder portion 37 of the auxiliary member 36 is located inside. The second intake duct 32 is inserted after the positioning bolt 47 fixed to the inspection panel 23a is inserted into the positioning hole 46 until the pressing flange portion 43 comes into contact with the seal flange portion 38 of the auxiliary member 36. Then, the assembly nut 48 is temporarily fastened to each of the positioning bolts 47. At this time, the second intake duct 32 is positioned to some extent by inserting the positioning bolt 47 into the positioning hole 46, and the pressing flange portion 43 and the seal flange portion 38 cover the entire circumference in the circumferential direction. It is in contact. Next, after the positions of the fastening hole 57 of the fastening bracket 55 and the bolt insertion hole 54 of the assembly bracket 50 are adjusted, the fastening bolt 53 is temporarily fastened to the fastening hole 57 through the bolt insertion hole 54. Then, the above-mentioned assembly nut 48 and the fastening bolt 53 are finally fastened. As a result, the second intake duct 32 is assembled.

In the intake duct 30 having such a configuration, the first seal member 35 is sandwiched between the seal cylinder portion 37 of the auxiliary member 36 and the connection cylinder portion 31A of the first intake duct 31. As a result, the first seal member 35 is appropriately compressed, so that the air in the accommodation chamber 17 passes through the gap between the seal cylinder portion 37 of the auxiliary member 36 and the connection cylinder portion 31A of the first intake duct 31. Invasion of the chamber 22 is suppressed. Further, the seal flange portion 38 of the auxiliary member 36 is pressed against the inspection panel 23a by the pressing flange portion 43 of the second intake duct 32 over the entire circumference in the circumferential direction. As a result, the second seal member 41 is appropriately compressed, and the air in the accommodation chamber 17 passes through the gap between the seal flange portion 38 of the auxiliary member 36 and the pressing flange portion 43 of the second intake duct 32. Is suppressed from invading.

(Exhaust duct 70)
As shown in FIG. 6, the exhaust duct 70 is connected to the first exhaust duct 71 fixed to the battery 16 and extending upward, and the first exhaust duct 71, and is connected to the inspection panel 23a on the accommodation chamber 17 side. It is provided with a second exhaust duct 72 that can be assembled from. In the exhaust duct 70, the exhaust gas flows upward through the first exhaust duct 71 and then flows into the second exhaust duct 72, so that the flow direction bends inward of the vehicle. After that, the flow direction of the exhaust gradually changes from the inside of the vehicle to the rear of the vehicle so as to follow the shape of the second exhaust duct 72, and is eventually discharged to the vehicle interior 22 through the exhaust port 73. .. The flow direction of the exhaust gas in the second exhaust duct 72 is referred to as a bending direction.

The first exhaust duct 71 is a molded product such as synthetic resin, and is a support flange portion integrally connected to an exhaust duct main body 74 fixed to the battery 16 and an upper end portion of the exhaust duct main body 74. A 75 and an insertion guide portion 76 extending upward from the inner edge portion of the support flange portion 75 are provided. The exhaust duct main body 74 has a substantially rectangular cross section in which the longitudinal direction is set in the width direction of the vehicle. The support flange portion 75 is a portion that supports the annular third seal member 77 that surrounds the insertion guide portion 76 in the circumferential direction from below. The third seal member 77 is an elastic seal member, for example, Eptsealer (registered trademark, manufactured by Nitto Denko KK, foam of EPDM mixture).

The insertion guide portion 76 is a downstream end portion of the first exhaust duct 71, and guides the position of the second exhaust duct 72 when the second exhaust duct 72 is connected to the first exhaust duct 71. The upper edge portion 76t of the insertion guide portion 76 is inclined toward the inside of the vehicle so as to be located in the bending direction of the exhaust gas flowing into the second exhaust duct 72, that is, the portion closer to the inside of the vehicle. ..

The second exhaust duct 72 is a duct that guides the exhaust gas that has passed through the first exhaust duct 71 to the exhaust port 73. The second exhaust duct 72 is integrally connected to the recess 80 that covers the area including the exhaust port 73 from below while avoiding interference with the intake duct 30, and the upper end portion of the recess 80, and inspects the second exhaust duct 72. It has an assembly flange portion 81 to be assembled to the panel 23a.

The recess 80 of the second exhaust duct 72 has an insertion port 82 at the bottom into which the insertion guide portion 76 of the first exhaust duct 71 is inserted, and has an inner portion 83 extending toward the inside of the vehicle and an inner portion. It has a curved portion 84 that curves toward the rear of the vehicle from the 83. A fourth sealing member 85 that seals the gap between the second exhaust duct 72 and the inspection panel 23a is adhered to the assembled flange portion 81. The fourth seal member 85 is an elastic seal member, for example, Eptsealer (registered trademark, manufactured by Nitto Denko KK, foam of EPDM mixture). The second exhaust duct 72 has a plurality of assembly bolt insertion holes 86 in a portion of the assembly flange portion 81 located outside the fourth seal member 85. In the second exhaust duct 72, after a plurality of assembly bolts 87 fixed to the back surface of the inspection panel 23a are inserted into the assembly bolt insertion holes 86, the assembly nut 88 is fastened to each assembly bolt 87. As a result, it can be assembled to the inspection panel 23a.

An example of the procedure of the above-mentioned method of assembling the exhaust duct 70 will be described with reference to FIGS. 7 and 8. It is assumed that the first intake duct 31 is attached to the battery 16.

In the exhaust duct 70, first, the third seal member 77 is adhered to the support flange portion 75 of the first exhaust duct 71, and the fourth seal member 85 is adhered to the assembled flange portion 81 of the second exhaust duct 72. Ru. As a result, the third adhesive layer 77a is formed at the boundary between the support flange portion 75 and the third seal member 77, and the fourth adhesive layer 85a is formed at the boundary between the assembled flange portion 81 and the fourth seal member 85. Will be done.

Subsequently, the first exhaust duct 71 is attached to the battery 16. At this time, the third adhesive layer 77a prevents the third seal member 77 from falling off. Further, the second exhaust duct 72 is assembled to the inspection panel 23a. At this time, the position shift of the fourth seal member 85 is suppressed by the fourth adhesive layer 85a. In the state where the second exhaust duct 72 is assembled to the inspection panel 23a, the air outside the vehicle interior 22 passes through the gap between the inspection panel 23a and the assembled flange portion 81 into the exhaust duct 70 in the fourth seal member 85. Suppress intrusion. Then, the inspection panel 23a to which the second exhaust duct 72 is assembled is attached to the body 21.

As shown in FIG. 7, the work of attaching the inspection panel 23a to the body 21 is performed using the panel 23c shown in FIG. 1 as a scaffold. The operator grasps the handle 23h, lifts the inspection panel 23a, and then moves the inspection panel 23a along the insertion direction 89 so that the first intake duct 31 is inserted into the opening 34. The inspection panel 23a is controlled so that the insertion guide portion 76 of the first exhaust duct 71 is inserted into the insertion port 82 of the second exhaust duct 72. By inserting the insertion guide portion 76 into the insertion port 82, the alignment of the first exhaust duct 71 and the second exhaust duct 72 is performed. The insertion guide portion 76 has a tapered shape with respect to the insertion port 82 of the second exhaust duct 72, so that the insertion guide portion 76 can be easily inserted into the insertion port 82.

When attaching the inspection panel 23a to the body 21, the operator often cannot visually recognize the position of the insertion guide portion 76 and the position of the insertion port 82 due to the inspection panel 23a as an obstacle. However, since the insertion guide portion 76 has a tapered shape, the insertion guide portion 76 can be easily inserted into the insertion port 82 of the second exhaust duct 72. Therefore, even when the inspection panel 23a is attached by one operator, the time required for the connection work between the first exhaust duct 71 and the second exhaust duct 72, that is, the position adjustment work of the inspection panel 23a is shortened. can do.

The insertion guide portion 76 is preferably inserted into the insertion port 82 before the first intake duct 31 is inserted into the opening 34. That is, it is preferable that the maximum height of the insertion guide portion 76 is larger than the protruding height of the connection cylinder portion 31A. According to such a configuration, the insertion timing of the insertion guide portion 76 into the insertion port 82 is earlier than the insertion timing of the first intake duct 31 into the opening 34. As a result, the insertion of the insertion guide portion 76 into the insertion port 82 can function not only as a connection between the first exhaust duct 71 and the second exhaust duct 72 but also as a guide for the first intake duct 31 with respect to the opening 34. ..

As shown in FIG. 8, when the inspection panel 23a is attached to the body 21, the third seal member 77 has a support flange portion 75 of the first exhaust duct 71 and a second exhaust duct 72 in the insertion direction of the second exhaust duct 72. It is sandwiched between the bottom of the inner portion 83 of the. As a result, the third seal member 77 is appropriately compressed, and the air on the accommodation chamber 17 side is prevented from entering the exhaust duct 70 through the gap between the first exhaust duct 71 and the second exhaust duct 72.

In the exhaust duct 70, the exhaust gas that has passed through the first exhaust duct 71 bends and flows inward of the vehicle. At this time, in the configuration in which the insertion guide portion 76 has a uniform height, a part of the insertion guide portion 76 becomes an obstacle when flowing inward of the vehicle, which hinders smooth exhaust. To. In this respect, in the above-described configuration, the upper edge portion 76t of the insertion guide portion 76 is located inside the vehicle so as to be located in the bending direction of the exhaust gas that has flowed into the second exhaust duct 72, that is, the portion closer to the inside of the vehicle. It is tilted toward you. Therefore, unlike the flow direction 90, the bending of the exhaust gas due to the inflow of the second exhaust duct 72 is not hindered, and smooth exhaust gas can be realized.

According to the duct structure of the battery cooling device of the above embodiment, the following effects can be obtained.
(1) In the intake duct 30, the dimensional error between the first intake duct 31 and the second intake duct 32 is absorbed by the auxiliary member 36. Therefore, the seal by the first seal member 35 and the seal by the second seal member 41 are embodied only by assembling the auxiliary member 36 and the second intake duct 32. As a result, the airtightness at the connection portion between the first intake duct 31 and the second intake duct 32 can be ensured under easy assembly work.

(2) Since the first seal member 35 is adhered to the connection cylinder portion 31A via the first adhesive layer 35a, the first seal member 35 when the seal cylinder portion 37 is inserted into the connection cylinder portion 31A. Misalignment is suppressed.

(3) Since the second seal member 41 is adhered to the seal flange portion 38 via the second adhesive layer 41a, the position adjustment of the auxiliary member 36 and the position adjustment of the second seal member 41 are performed at the same time. be able to.

(4) The compression of the second seal member 41 by the seal flange portion 38 is regulated by the thick portions 40 of the auxiliary member 36 coming into contact with the inspection panel 23a. As a result, excessive compression of the second seal member 41 is suppressed, so that more reliable sealing by the second seal member 41 and early deterioration of the second seal member 41 itself can be suppressed.
(5) According to (2) to (4), the assembling work of the auxiliary member 36 can be facilitated.

(6) Pressing of the sealing flange portion 38 The pressing of the flange portion 43 is restricted by the spacer 45 coming into contact with the inspection panel 23a. As a result, excessive bending deformation of the overhanging piece 44 due to the fastening of the pair of positioning bolts 47 and the assembly nut 48 can be suppressed.

(7) By inserting the positioning bolt 47 into the positioning hole 46, the positioning of the second intake duct 32 with respect to the inspection panel 23a and the attachment work of the bolt for assembling the second intake duct 32 to the inspection panel 23a can be performed at the same time. can. Moreover, the work of assembling the auxiliary member 36 and the second intake duct 32 is performed from the front side of the vehicle with respect to the inspection panel 23a. Therefore, since the positioning hole 46 and the positioning bolt 47 are arranged on the front side of the vehicle, that is, at a position close to the operator, the work of inserting the positioning bolt 47 into the positioning hole 46 is performed with high visibility. Can be done.

(8) When the second intake duct 32 is positioned by the positioning hole 46 and the positioning bolt 47, the assembly piece 52 of the assembly bracket 50 and the fastening piece 58 of the fastening bracket 55 are aligned diagonally upward on the front side. They are in a state of facing each other in the direction. At this time, since the fastening hole 57 can be visually recognized through the bolt insertion hole 54 from diagonally above the front side with respect to the fastening hole 57, the visibility of the bolt insertion hole 54 and the fastening hole 57 can be improved.

(9) The work of fastening the fastening bolt 53 to the fastening hole 57 can also be performed from diagonally above the front side. Moreover, since the fastening hole 57, which is a female thread portion, is formed in the fastening bracket 55, the fastening operation of the fastening bolt 53 can be easily performed even if the back panel 23b is located immediately on the rear side.

(10) By each of (6) to (9), the assembling work of the second intake duct 32 can be facilitated. The facilitation of the assembling work of the second intake duct 32 also leads to the facilitation of the removal work of the second intake duct 32 at the same time.

(11) The upper edge portion 76t of the insertion guide portion 76 is inclined so as to be located downward toward a portion closer to the bending direction of the exhaust gas flowing into the second exhaust duct 72. According to such a configuration, the second exhaust duct 72 can be easily guided when the first exhaust duct 71 and the second exhaust duct 72 are connected. Further, since the bending of the exhaust gas due to the inflow to the second exhaust duct 72 is not hindered, smooth exhaust gas can be realized.

In addition, the above-mentioned embodiment can be changed as appropriate and carried out as follows.
-For the intake duct 30, when assembling the second intake duct 32 to the inspection panel 23a, the second intake duct 32 is fixed to the inspection panel 23a, and the relative position of the second intake duct 32 to the inspection panel 23a is specified. Any configuration may be used. Therefore, it may be configured only by the combination of the positioning bolt 47 and the assembly nut 48, or may be configured only by the combination of the assembly bracket 50 and the fastening bracket 55.

-For the intake duct 30, the spacer 45 may be connected to the overhanging piece 44, and the positioning hole 46 may be formed only in the overhanging piece 44. Even with such a configuration, the action and effect described in (6) above can be obtained.

When the intake duct 30 includes a combination of the positioning bolt 47 and the assembly nut 48 as the assembly mechanism of the second intake duct 32 with respect to the inspection panel 23a, even if the spacer 45 is omitted from the overhanging piece 44. good.

-For the intake duct 30, the seal flange portion 38 of the auxiliary member 36 may be composed of only the thin-walled portion 39.
The intake duct 30 is not limited to the configuration in which the first seal member 35 is adhered to the connecting cylinder portion 31A, but may be configured to be adhered to the inside of the seal cylinder portion 37 of the auxiliary member 36. Further, the first seal member 35 may be configured not to be adhered to both the connection cylinder portion 31A and the seal cylinder portion 37.

Regarding the intake duct 30, the second seal member 41 is not limited to the configuration in which it is adhered to the seal flange portion 38, but may be configured to be adhered to the inspection panel 23a. Further, the second seal member 41 may be configured not to be adhered to both the seal flange portion 38 and the inspection panel 23a.

-The duct structure of the intake duct 30 described above can be applied not only to the intake duct but also to the exhaust duct. Further, the duct structure of the exhaust duct 70 described above can be applied to the intake duct with the first exhaust duct 71 as the first duct portion and the second exhaust duct 72 as the second duct portion.

11 ... chassis, 13 ... side frame, 14 ... cross member, 15 ... body frame, 16 ... battery, 17 ... accommodation room, 21 ... body, 22 ... vehicle compartment, 23 ... panel, 23a ... inspection panel, 23b ... back panel , 23c ... panel, 23h ... handle, 25 ... battery cooling device, 30 ... intake duct, 31 ... first intake duct, 31A ... connection tube, 32 ... second intake duct, 33 ... air filter, 34 ... opening, 35 ... 1st seal member, 35a ... 1st adhesive layer, 36 ... auxiliary member, 37 ... seal tube portion, 38 ... seal flange portion, 39 ... thin wall portion, 40 ... thick wall portion, 41 ... second seal member, 41a ... 2nd adhesive layer, 42 ... duct body, 43 ... pressing flange, 44 ... overhanging piece, 45 ... spacer, 46 ... positioning hole, 47 ... positioning bolt, 48 ... assembling nut, 50 ... assembling bracket, 51 ... Fixed piece, 52 ... Assembly piece, 53 ... Fastening bolt, 54 ... Bolt insertion hole, 55 ... Fastening bracket, 56 ... Fixed piece, 57 ... Fastening hole, 58 ... Fastening piece, 70 ... Exhaust duct, 71 ... First Exhaust duct, 72 ... 2nd exhaust duct, 73 ... Exhaust port, 74 ... Exhaust duct main body, 75 ... Support flange, 76 ... Insertion guide, 76t ... Upper edge, 77 ... Third seal member, 77a ... 3 Adhesive layer, 80 ... Concave part, 81 ... Assembly flange part, 82 ... Insertion port, 83 ... Inner part, 84 ... Curved part, 85 ... 4th seal member, 85a ... 4th adhesive layer, 86 ... Assembly bolt Insertion hole, 87 ... Assembly bolt, 88 ... Assembly nut, 89 ... Insertion direction, 90 ... Flow direction.

Claims (6)

It is a duct structure of a battery cooling device that cools the battery in the containment room with the air in the vehicle interior.
The first duct portion attached to the battery and having a connecting cylinder portion protruding into the vehicle interior through an opening formed in a panel separating the accommodation chamber and the vehicle compartment, and the first duct portion.
The first seal member surrounding the connection cylinder portion and
An auxiliary member having a seal cylinder portion that surrounds the first seal member and presses the first seal member against the connection cylinder portion, and a seal flange portion that faces the panel from the passenger compartment side.
A second seal member that surrounds the opening between the panel and the seal flange portion,
A second duct portion assembled to the panel from the passenger compartment side, the duct main body portion surrounding the seal cylinder portion, and a pressing flange portion for pressing the second seal member against the panel via the seal flange portion. The duct structure of the battery cooling device comprising the second duct portion having the Claim 1 having at least one of a first adhesive layer for adhering the first seal member to the connection cylinder portion or the seal cylinder portion, and a second adhesive layer for adhering the second seal member to the seal flange portion. The duct structure of the battery cooling device described in. The seal flange portion is
The thin-walled portion on which the second seal member faces and the thin-walled portion
The duct structure of the battery cooling device according to claim 1 or 2, which is integrally connected to the outer peripheral portion of the thin-walled portion and has a plurality of thick-walled portions having a wall thickness larger on the panel side than the thin-walled portion. A positioning bolt fixed to the panel and located outside the seal flange portion of the auxiliary member, and
A positioning hole formed in the second duct portion through which the positioning bolt is inserted,
The duct structure of the battery cooling device according to any one of claims 1 to 3, further comprising a nut fastened to the positioning bolt inserted into the positioning hole. The second duct portion is
An overhanging piece that is integrally connected to the pressing flange portion and projects outward from the seal flange portion of the auxiliary member.
It has a spacer connected to the overhanging piece and located between the overhanging piece and the panel.
The positioning hole is
The duct structure of the battery cooling device according to claim 4, which is a hole penetrating the overhanging piece and the spacer. The first duct portion and the second duct portion constitute an intake duct that guides air in the vehicle interior to the battery.
The battery cooling device has an exhaust duct for guiding exhaust, which is air discharged to the passenger compartment, through an exhaust port formed in the panel.
The exhaust duct is
The first exhaust duct fixed to the battery and
A second exhaust duct that is fixed to the panel and is located on the opposite side of the vehicle interior to the panel and guides the exhaust that has passed through the first exhaust duct to the exhaust port, and is a second exhaust duct of the first exhaust duct. It is provided with the second exhaust duct having an insertion port into which the downstream end is inserted and bending the flow direction of the exhaust in the bending direction.
The downstream end of the first exhaust duct is
The duct structure of the battery cooling device according to any one of claims 1 to 5, which has an upper edge portion located lower toward the portion on the bending direction side.

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