JPH04208627A - Automobile lower part car body structure - Google Patents

Abstract

PURPOSE:To improve the rigidity strength of a dashpanel by providing at dashpanel through-holes that penetrate the dashpanel so that air may flow between respective car room side and engine room side air conditioning units, reinforcement means that prevent dashpanel rigidity strength lowering caused by through-holes. CONSTITUTION:As for an air conditioning unit, a heater unit 18 which becomes a part of the unit, is arranged on a car room side separated by a dashpanel 3, while a blower unit 13, an intake box 15 and a cooler unit 16 which become the remainder, are arranged on an engine room side separated by the dashpanel 3. And at the dashpanel 3, through-holes 33 which make air flowing in the air conditioning unit 11 circulate through the dashpanel 3, are formed. In this instance, at through-holes 33 (the 1st through-hole 31 and the 2nd through-hole 32), reinforcement means 34 which prevent the lowering of the rigidity strength of the dashpanel 3 caused by through-hole 33, are provided. As a result, through- holes 33 are reinforced by means of reinforcement means 34, and the rigidity strength lowering of the dashpanel 3 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the lower body structure of an automobile, and more specifically, to measures for reinforcing gutters/juvenels associated with the arrangement of an air conditioning unit.

(Prior Art) In general, in the arrangement of air conditioning units in automobiles, at least a switching unit for switching between vehicle interior air and vehicle exterior air, a cooler unit, and Air conditioning unit connected from heater unit.

It is known that the engine compartment is located on the side of the vehicle interior immediately behind the dash panel that partitions the engine room and the vehicle interior.

(Invention or Problem to be Solved) By the way, depending on the type of automobile, a part of the air conditioning unit is placed in the passenger compartment across the dash panel that separates the engine compartment from the single compartment, while the rest is placed in the passenger compartment. It is sometimes placed on the engine room side across the dash panel. In that case, a through hole will be provided in the dash panel to allow air to flow through the air conditioning unit. Therefore, the rigidity and strength of the dash panel are significantly reduced due to the through holes.

The present invention has been made in view of this point, and an object of the present invention is to make it possible to increase the rigidity of a dash panel even if an air conditioning unit is placed across the dash panel.

(Means for Solving the Problem) In order to achieve the above object, the solving means taken by the invention according to claim (1) includes at least a switching unit and a cooler for switching the introduction of air inside the vehicle and air outside the vehicle. Some of the air conditioning unit and heater unit are located on the passenger compartment side across the dash panel that separates the engine room and the passenger compartment, while the rest are located on the engine compartment side across the dash panel. The present invention is based on a lower body structure of an automobile, in which air flowing through the air conditioning unit is disposed in the air conditioning unit and flows through a through hole penetrating the dash panel. Further, the through-hole of the dash panel is provided with reinforcing means for preventing a decrease in the rigidity and strength of the dash panel due to the through-hole.

In addition, the solution taken by the invention according to claim (2) is such that the through hole is formed into a first through hole through which air flows between the cooler unit and the heater unit, and a second through hole through which the air inside the vehicle compartment is guided to the switching unit. It is composed of a through hole.

Furthermore, the solution taken by the invention according to claim (3) is:
The reinforcing means is a fin-shaped member oriented in the flow direction of the air flowing through the through hole.

(Function) With the above configuration, in the invention according to claim (1), among the air conditioning units consisting of at least a switching unit for switching the introduction of air inside the cabin and air outside the cabin, a cooler unit, and a heater unit, the engine room t: Air flows between part of the air conditioning unit located on the passenger compartment side and the rest of the air conditioning unit located on the engine compartment side across the dash panel. In the through hole of the dash panel,
Since a reinforcing means is provided to prevent a decrease in rigidity and strength of the dash panel due to the through hole, even if the dash panel is provided with a through hole that allows air to flow through the air conditioning unit, the through hole in the dash panel The rigidity of the dash panel will not be reduced due to the reinforcement provided by the reinforcing means and the provision of the through hole.

Further, in the invention according to claim (2), the through hole is constituted by a first through hole through which air flows between the cooler unit and the heater unit, and a second through hole that guides air in the vehicle interior to the switching unit. Therefore, the part of the air conditioning unit placed in the single cabin across the dash panel is only one of the cooler unit and heater unit, which takes up a lot of space in the cabin and makes it difficult to install the air conditioning unit. Increases the freedom of placement layout.

Furthermore, in the invention according to claim (3), since the reinforcing means is a fin-shaped member oriented in the flow direction of the air flowing inside the air conditioning unit, there is resistance to the ventilation of the air when passing through the through hole of the dash panel. becomes as small as possible.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIGS. 2 and 3 show the front part of a one-box type automobile using the lower body structure according to the embodiment of the present invention.
2 is an engine room, and 2 is a vehicle compartment tear. The engine room 1 and the vehicle compartment 2 are separated by a dash panel 3 extending in the width direction of the vehicle.

An enron 4 whose crankshaft (not shown) extends in the longitudinal direction of the vehicle body is mounted substantially in the center of the engine room 1. The rear part of the engine 4 protrudes toward the passenger compartment 2 side, and in order to avoid interference with the rear part of the engine 4 (rear part of the engine 4), the central part of the Danonyu panel 3 is provided with a protruding part that protrudes toward the passenger compartment 2 side. 3a is provided.

Further, as shown in FIG. 1, an air conditioning unit] 1 is provided on the left side of the engine 4. The air conditioning unit 11 includes a pro-a unit 13 in which a sirocco fan 12 is housed, and a suction side 1 of the pro-a unit 13.
3H, one end opening 15a (downstream end) is connected to the intake box 15 as a switching unit, which is equipped with a switching damper 14 that appropriately switches the introduction of vehicle interior air or vehicle exterior air;
One end opening 16a (upstream end) is connected to the cooler unit 16, and the evaporator 20 is housed inside the cooler unit 16, and one end opening 18a is connected to the other end opening 16b (downstream end) of the cooler unit 16.
(Upstream end) is connected and consists of a heater unit 18 with a condenser 17 housed inside. The intake box 15 has a first other end opening 15b (upstream end) that opens at the upstream end or into the vehicle interior 2, and an outside air intake passage (not shown) that opens at the upstream end or outside the vehicle interior 2. A second other end opening 15c (upstream end) connected to the downstream end of the holder is provided. The heater unit 18 also has a first other end opening 18b (upstream end) connected to a defogger air outlet (not shown) that opens at the defogger position in the upper part of the vehicle interior 2; A second other end opening 18C (upstream end) connected to a ventilation air outlet (not shown) that opens at the central bench lane position, and a heater opening that opens at the heater position at the lower part of the single room 2. A third other end opening 18d (upstream end) connected to an air outlet (not shown) is provided.

In this case, the switching damper 14 of the intake hook 15
By switching, air from inside the vehicle compartment 2 via the first other end opening 15b, or air from outside the vehicle compartment 2 via the second other end opening 15c, or air from the one end opening 15a to the suction side of the pro unit 13. After the air is sucked into 13a by the suction force of the sirocco fan 12, and is supplied to the heater units 18 and \ in order from the air outlet side 13b via the cooler unit]6,
The air is mixed by the cooler unit 16 and the heater unit 18, and flows into the vehicle interior 2 from the defogger air outlet through the first other end opening 18b, and from the bench lane air outlet through the second other end opening 18c. From inside the passenger compartment 2,
The air is appropriately supplied as conditioned air into the vehicle interior 2 from the heater air outlet through the third other end opening 18d.

The air conditioning unit 11 is provided with a heater unit 18, which is a part of the unit, or on the side of the vehicle compartment 2 across the dash panel 3, while the remaining parts are the pro lower unit 13, the intake box 15, and the cooler unit. 16 is located on the engine room 1 side across the dash panel 3. In addition, in the above Dasonyu panel 3,
A first through hole through which air flows through the dash panel 3 between the opening 18a at one end of the heater unit 18 on the side of the vehicle compartment 2 and the opening 16b at the other end of the cooler unit 16 on the side of the engine room 1. 31 are provided. Furthermore, a second through hole 32 is provided in the dash panel 3 located on the left side of the first through hole 31 to guide the air inside the vehicle compartment 2 to the first other end opening of the intake box 15. The first through-hole 31 and the first through-hole 31 form a through-hole 3B through which the air flowing inside the empty unit 11 can flow through the dash panel 3. The through holes 33 (the first through holes 31 and the second through holes 32) are provided with reinforcing means 34 for preventing the rigidity and strength of the dunnyu pad 3 from decreasing due to the through holes 33. This reinforcing means 3
4 is the portion of the dash panel 3 corresponding to the first through hole 31, or the other end opening 16 of the cooler unit 16.
They are cut and raised toward the cooler unit 16 side (vehicle compartment 2 side) at predetermined intervals in the vehicle width direction so as to be oriented in the flow direction of air flowing from b to one end opening 18a of the heater unit 18. The dash panel 3 portion corresponding to the second through hole 32 or the intake box 1
They are cut and raised toward the vehicle compartment 2 at predetermined intervals in the vertical direction so as to be oriented in the flow direction of air flowing toward the first other end opening 15b of the air conditioner 5.

Therefore, in the above embodiment, among the air conditioning unit 1 consisting of the air conditioner unit 13, the intake unit 15, the cooler unit 6, and the heater unit 18, the engine room 1 and the vehicle compartment 2 are separated by the dash panel 3. A dash that is penetrated so that air can flow between a heater unit 18 placed on the side of the room 2 and a proa unit 13, an intake box 15, and a cooler unit 16 placed on the side of the engine room 1 across the dash panel 3. This through hole 33 (the 1 through hole 31 and 2nd through hole 32
) is provided, reinforcing means '34 is provided to prevent a decrease in rigidity and strength of the dash panel 36 due to the provision of the dash panel 36.
Even if the dash panel 3 is provided with a through hole 33 for circulating the air flowing inside the air conditioning unit 11, the through hole 33 of the dash panel 3 is reinforced by the reinforcing means 34, and the rigidity of the dash panel is not reduced. As a result, the vehicle interior 2 is separated from the dash panel 3 by the through hole 33.
Despite the arrangement layout in which the air conditioning unit 11 is arranged separately on the side and the engine room 1 side, the rigidity and strength of the dash panel 3 can be improved.

In addition, as a part of the air conditioning unit 11 arranged on the side of the vehicle compartment 2 across the dash panel 3, a heater unit 18 is provided.
Therefore, the degree of freedom in the arrangement layout of the air conditioning unit 11 can be increased while taking up a large space in the vehicle interior 2.

Further, the reinforcing means 34 is attached to a portion of the dash panel 3 corresponding to the first through hole 31 or a portion of the cooler unit 1. The grooves are cut and raised toward the cooler unit 16 side (vehicle compartment 2 side) at predetermined intervals in the vehicle width direction so as to be oriented in the flow direction of air flowing from the other end opening 16b of the heater unit 18 to the one end opening 18a of the heater unit 18. The second through hole 32 is formed by
The dash panel 3 portion corresponding to the first other end opening 15b of the intake box 15 is formed by cutting and raising it toward the trunk compartment 2 side at predetermined intervals in the vertical direction so as to be oriented in the flow direction of the flowing air. ing.

As a result, the ventilation resistance of the air when passing through the through hole 33 of the Gino/Yubanel 3 is made as small as possible, and the resistance of the air when passing through the through hole 33 of the Gino/Yubanel 3 is made as small as possible.・Improve the rigidity and strength of Yupefuru 3 with one through hole'
It is possible to ensure the amount of air passing through 3.3.

(Other Embodiments) Fig. 4 shows a second embodiment; parts that are the same as those in Fig. 1 are given the same reference numerals and detailed explanations thereof are omitted), and the reinforcing means 34 is changed. This is what I did.

That is, in this embodiment, the reinforcing means 34 is formed to be slightly larger than the first through hole 31, and is oriented in the flow direction of air flowing from the other end opening 16b of the cooler unit 16 to the one end opening 18a of the heater unit 18. The first fin-shaped members 41 are cut and raised toward the cooler unit 16 at predetermined intervals in the vertical direction except for the peripheral edges corresponding to the first through-holes 31, and the second through-holes 32 have approximately -
and the first other end opening 15 of the intake box 15
so that it is oriented in the flow direction of the air flowing to b.

Second holes are cut and raised toward the vehicle interior 2 at predetermined intervals in the vertical direction except for the peripheral edge corresponding to the second through hole 32.
The fin-like member 42 is configured by a fin-like member 42.

The first fin-shaped member 4] is sandwiched between the periphery of the first through hole 31 on the side surface of the engine room 1 of the dash panel 3, and the periphery of the opening 16b at the other end of the tara unit 16, and in this state, the dash panel The periphery of the opening 18a at one end of the heater unit 18 is arranged around the periphery of the first through-hole 31 on the side surface of the vehicle compartment 2 of No. , the periphery of the first through hole 31 of the dash panel 3, and the periphery of the opening 18a at one end of the heater unit]8 are collinear with each other by bolts fastened at the four corners.

Further, the second fin-like member 42
At the periphery of the second through hole 32 on the side surface of the engine room 1, the periphery or the first other end opening 1 of the intake box 15
It is collinear with the periphery of the first through hole 31 on the side surface of the passenger compartment 2 of the darranyu panel 3 by fastening bolts at the four corners while being sandwiched between the periphery of the casing 5b.

Therefore, in this embodiment, since the reinforcing means 34 is separate from the first fin-like member 41 and the second fin-like member 42, it is more reinforced than when the reinforcing means is provided in the dash panel corresponding to the through hole. The means 34 can be easily constructed.

In addition, in this example as well, the same functions and effects as in the above embodiment can be obtained.

Further, FIG. 5 shows a third embodiment, in which the reinforcing means 34 is changed.

That is, in this embodiment, the reinforcing means 34 is formed of two stator tubes that are separable, and extends in the direction of air flow from the other end opening 16b of the cooler unit 16 to the one end opening of the heater unit 18. The first fin-shaped members 51 and 52, which are each bent in a direction perpendicular to the air flow direction, and two stay types can be used to separate the first fin-shaped members 51 and 52, each of which is bent in a direction perpendicular to the air flow direction, except for the end corresponding to the first through-hole 31. and the portions excluding the end corresponding to the second through hole 32 are oriented perpendicular to the air flow direction so as to be oriented in the flow direction of the air flowing to the first other end opening 15b of the intake box 15. It is constituted by twisted second fin-like members 53 and 54.

The first fin-like members 51 and 52 have one end thereof located on one diagonal of the periphery of the first through-hole 31 on the side surface of the engine compartment 1 of the dash panel 3. Other end opening 1 of unit 16
．． Another first fin-shaped member 5 sandwiched between the periphery of 6 b
2 or on the other diagonal of the periphery of the first through hole 31 on the side surface of the vehicle compartment 2 of the dash panel 3, its end is sandwiched by the periphery of the opening 18a at one end of the heater unit 18, and the first fin-like member 51.52 is The peripheral edge of the other end opening 16b of the cooler unit 16 from the engine room 1 side, the end of the fin-shaped member 51, and the first through hole 3 of the dash panel 3.
The first periphery, the end of the first fin-like member 51, and the periphery of the opening 183 at one end of the heater unit 18 are collinear by fastening bolts at the four corners. Further, the second fin-like member 5
3.54 is one of the second fin-like members 53 or the engine compartment of the dash panel 3 ] the second through hole 3 on the side surface
On one diagonal line of the two peripheral edges, its end is sandwiched between the first other end opening 15b peripheral edge of the intake box 15, and another second fin-shaped member 54 is inserted into the second through hole on the side surface of the passenger compartment 2 of the dash panel 3. The second fin-like members 53 and 54 are arranged on the other diagonal of the periphery of the hole 32 in an X-shape, and the first
The periphery of the other end opening 15b, the end of the second fin-like member 53, the periphery of the second through-hole 32 of the dash panel 3, and the end of the second fin-like member 54 are collinear by fastening bolts at their four corners.

Therefore, in this embodiment, the reinforcing means 34 is separate from the first fin-like member 51.52 and the second fin-like member 53.54, and is of a stell type that is easy to process. or even easier to configure.

In addition, in this example as well, the same functions and effects as in the above embodiment can be obtained.

Further, FIGS. 6 and 7 show a fourth embodiment, in which the first through hole 31 is reinforced without using a fin-like member.

That is, in this embodiment, the first through hole 31 is formed while leaving a periphery corresponding to the periphery of the first through hole 31 on the side surface of the vehicle compartment 2 of the dash panel 3 at one end opening 18a of the heater unit 18.
An extension flange 61 is provided which extends to the engine room 1 side via the flange 61. The extending flange 61 is formed in a tapered shape that widens outward to such an extent that its tip end is inserted into the first through hole 31 . The other end opening 16b of the cooler unit 16 is formed in a reverse tapered shape that contracts inward corresponding to the inner peripheral surface of the extending flange 61, and the outer peripheral surface of the other end opening 16b of the cooler unit 16 is A sealing material 62 made of urethane is provided over the entire area. and,
The outer circumferential surface of the other end opening 16b of the cooler unit 16 is attached to the inner circumferential surface side of the extending flange 61 via the sealing material 62.

Further, stud bolts 63 are provided at the four corners of the periphery of the opening 18a at one end of the heater unit 18. ... is provided, and this stud bolt 63. ..., the heater unit 18
is bolted to the periphery of the first through hole 31 of the dash panel 3. Further, on the top, bottom, left and right of the heater unit 18, flange portions 6 are provided for attachment to vehicle body members having high rigidity and strength such as a steering support member (not shown).
4. ... is provided to protrude outward. On the other hand, on the top, bottom, left and right sides of the cooler unit 16, flange portions 65 (only one location is shown in the figure) for attachment to the engine 4 and other vehicle body members having high rigidity and strength are provided to protrude outward. In this case, the flange portion 64. The heater unit 18 is attached to a vehicle body member having high rigidity and strength through an opening at one end located on the proximal end side of the extending flange 61 passing through the first through hole 31. 18 a is configured as reinforcing means 34 .

In addition, the reinforcing means 34 of each of the above embodiments is provided in the second through hole 32.
or used as appropriate.

Therefore, in this embodiment, the heater unit 18 is attached to the engine 4 and a vehicle body member having high rigidity and strength.
The first through hole 31 is reinforced by an extended flanone 61 that extends from the opening 18a at one end and is inserted into the first through hole 31.

In that case, the one end opening 18a of the heater unit 18 and the other end opening 16b of the cooler unit 16 are connected to the four corners of the one end opening 18a of the heater unit 18 to the periphery of the first through hole 31 on the side surface of the vehicle compartment 2 of the dash panel 3. Implant Holt 63. . . , there is no need to provide a seal space around the first through hole 31 on the side surface of the engine compartment 1 of the dash panel 3, and the unit space on the other end opening 16b side of the cooler unit 16 can be expanded.

(Effects of the Invention) As described above, according to the lower body structure of the automobile according to the invention of claim (1), a part of the air conditioning unit on the passenger compartment side separated by the dash panel that partitions the engine room and the single room;
A reinforcing means is installed in the through hole of the dash panel, which is passed through the dash panel so that air can flow between the dash panel and the rest of the air conditioning unit on the room side, to prevent the rigidity of the dash panel from decreasing due to the through hole. The through-holes that allow air to flow through the dash panel are reinforced with reinforcing means to prevent the rigidity and strength of the dash panel from decreasing. The rigidity and strength of the dash panel 3 can be improved regardless of the arrangement layout of the units.

Further, according to the lower vehicle body structure of the automobile according to the invention of claim (2), the first through hole through which air flows between the cooler unit and the heater unit, and the second through hole that guides the air inside the vehicle compartment to the switching unit. Since a through hole is formed with the hole, only a part of the air conditioning unit, cooler unit, or heater unit is required on the single room side across the dash panel, which allows for freedom in the arrangement and layout of the air conditioning unit while securing a large space in the passenger compartment. The degree can be expanded.

Furthermore, according to the lower body structure of an automobile according to the invention of claim (3), since the reinforcing means is a fin-shaped member oriented in the flow direction of the air flowing inside the air unit,
The ventilation resistance of air when passing through the through-hole of a dash panel can be made as small as possible, and the amount of ventilation of air passing through the through-hole can be ensured while improving the rigidity and strength of the dash panel.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an exploded perspective view of the air conditioning unit across the dash panel, FIG. 2 is a longitudinal sectional plan view of the front of the vehicle body cut near the air conditioning unit, and
The figure is a rear view of the dash panel viewed from the single compartment side. Further, FIG. 4 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention. Further, FIG. 5 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention. Further, FIGS. 6 and 7 show a fourth embodiment of the present invention, with FIG. 6 being a view corresponding to FIG. 1, and FIG. 7 being a longitudinal sectional plan view showing the connection relationship between the cooler unit and the heater unit. 11... Air conditioning unit 14 - Intake box (switching unit) 16... - Cooler unit 18... Heater unit Engine room 2... Vehicle interior 3... Dash panel 33... Through hole 34... Reinforcing means 31...First through hole 32-/Second through hole 41.52.52...First fin-shaped member (fin-shaped member) 42.53.54...Second fin-shaped member (fin-shaped member) (Materials) Patent applicant: Mazda Motor Corporation representative
1) Hirohaka 1 person Figure 2

Claims (3)

[Claims] (1) At least part of the air conditioning unit, which consists of a switching unit that switches between introducing air inside the vehicle and air outside the vehicle, a cooler unit, and a heater unit, is separated by a dash panel that partitions the engine room and the passenger compartment. The lower part of an automobile is placed on the passenger compartment side, while the rest is placed on the engine room side across the dash panel, so that the air flowing inside the air conditioning unit flows through a through hole penetrating the dash panel. 1. A lower vehicle body structure for an automobile, wherein the through hole of the dash panel is provided with reinforcing means for preventing a decrease in rigidity and strength of the dash panel due to the through hole. (2) According to claim (1), the through hole is constituted by a first through hole through which air flows between the cooler unit and the heater unit, and a second through hole that guides air in the vehicle interior to the switching unit. car lower body structure. (3) The lower body structure of an automobile according to claim (1), wherein the reinforcing means is a fin-shaped member oriented in the direction of air flow flowing through the through hole.