JP3928429B2 - Vehicle battery support structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support structure for a battery mounted on a vehicle.
[0002]
[Prior art]
A battery mounted on a vehicle such as an automobile is usually stored in an engine room. However, since this battery is heavy, it is generally supported by a front side member, which is a high-strength body frame member, via a battery bracket. Is.
[0003]
In this case, although the engine mount bracket is disposed in the vicinity of the battery bracket, the battery bracket is provided exclusively to support the battery.
[0004]
For this reason, the number of brackets attached to the front side member is increased, and the battery bracket is enlarged in order to support a heavy battery, and the weight of the vehicle body is inevitably increased.
[0005]
Therefore, there is a support structure in which the battery bracket can be eliminated by supporting the battery on the engine mount bracket (see Japanese Patent No. 2697218).
[0006]
This support structure also has a function of reducing the natural frequency of the engine mount by supporting the battery with the engine mount bracket and adding the mass of the battery to the engine mount bracket.
[0007]
That is, by reducing the natural frequency of the engine mount in this way, the resonance region of the engine mount can be shifted in the low frequency direction from the low frequency vibration region causing noise in the vehicle interior such as idle vibration and gear noise. Therefore, the anti-vibration effect against idle vibration and gear noise can be increased.
[0008]
[Problems to be solved by the invention]
However, in the support structure in which the battery is supported by the engine mount bracket, the weight of both the battery and the engine is supported by the engine mount bracket. As a result, the engine mount bracket is increased in size and is directed toward the front end portion of the front side member. It will overhang.
[0009]
However, the front end of the front side member is a part that absorbs collision energy by collapsing the shaft in a bellows shape at the time of a frontal collision, and the engine mount bracket is located at the front end that absorbs this energy to absorb collision energy. Efficiency will fall.
[0010]
In addition, despite the fact that the battery is reduced by supporting the battery on the engine mount bracket in this way, the size of the engine mount bracket increases, so the weight reduction and cost reduction effects due to the elimination of the battery bracket are reduced. End up.
[0011]
Therefore, the present invention provides a vehicle battery support that can effectively prevent vibration of the low frequency vibration region by the engine mount, prevent the engine mount bracket from being enlarged, and sufficiently secure the collision energy absorption function by the vehicle body skeleton member. The purpose is to provide a structure.
[0012]
[Means for Solving the Problems]
According to the first aspect of the present invention, the battery mounting base mounted on the vehicle is divided into the first split base and the second split base, and the first split base is attached to the vehicle bracket member. The other second divided base is supported by an engine mount bracket attached to the vehicle body frame member so as to be separated from the battery bracket in the front-rear direction .
[0013]
According to a second aspect of the present invention, in the battery support structure for a vehicle according to the first aspect, the mounting table is provided with battery position regulating means for determining a relative position between the battery and the mounting table according to the battery size. It is characterized by that.
[0014]
According to a third aspect of the present invention, in the battery support structure for a vehicle according to the second aspect, the battery position regulating means includes a plurality of regulating positions.
[0015]
【The invention's effect】
According to the first aspect of the present invention, since the first divided table obtained by dividing the battery mounting table into two parts is supported by the battery bracket and the second divided table is supported by the engine mount bracket, the battery bracket and the engine mount bracket are used. Since the weight of the battery can be shared, the battery weight borne by the engine mount bracket can be reduced as compared to the case where the battery is supported only by the engine mount bracket.
[0016]
For this reason, it is possible to prevent the engine mount bracket from becoming large, and to ensure the function of absorbing the collision energy at the front end portion of the vehicle body skeleton member.
[0017]
Further, since the natural frequency of the engine mount can be adjusted by the weight of the battery borne by the engine mount bracket, it is possible to exhibit a vibration isolation function for low frequency vibration regions such as idle vibration and gear noise.
[0018]
Furthermore, since the enlargement of the engine mount bracket is prevented, weight reduction and cost reduction can be achieved.
[0019]
Furthermore, since the battery is supported across the battery bracket and the engine mount bracket, it is not necessary to dispose the battery directly above the engine mount, and the degree of freedom in the layout of the battery in the engine room can be increased.
[0020]
According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, a battery position regulating means is provided on the mounting table, and the relative position between the battery and the mounting table is determined according to the battery size. As a result, the relative weight of the battery bracket and the engine mount bracket can be set in advance so that the weight burden ratio of the battery can be adjusted regardless of the size of the mounted battery. The natural frequency of the engine mount can be set so as to prevent vibrations in low frequency vibration areas such as idle vibration and gear noise.
[0021]
According to the third aspect of the present invention, in addition to the effect of the second aspect of the invention, the battery position restricting means has a plurality of restricting positions. When the vibration area of gear and gear noise is different, the weight of the engine mount bracket can be adjusted accurately by changing the fixed position of the battery according to multiple restriction positions. Anti-vibration function can be demonstrated.
[0022]
Even with the same vehicle model with the same engine and gear box, batteries with different sizes may be used due to cold district specifications. By changing the restriction position of the battery so that the weight ratio of the battery is constant, the natural frequency of the engine mount can be set to a frequency band that can effectively prevent idle vibration, gear noise, and the like.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0024]
1 to 6 show a first embodiment of a vehicle battery support structure according to the present invention, FIG. 1 is a side view showing a battery support state, and FIG. 2 shows one first divided table obtained by dividing the mounting table. 3 is a plan view of the battery position regulating means, FIG. 4 is a side view showing a collision state of the battery support structure, and FIG. 5 is a model diagram showing a vibration system of the engine mount to which the weight of the battery is added. 6 is a graph showing a comparison of vibration transmissibility with and without the battery weight added to the engine mount bracket.
[0025]
In the battery support structure of the present embodiment, as shown in FIG. 1, a battery 10 is mounted in an engine room ER in which a power source such as an engine or a motor is stored. The battery 12 is mounted on a battery tray 11 as a mounting table provided on the member 12.
[0026]
The front side member 12 is a vehicle body skeleton member that is located in the vehicle width direction side of the engine room ER and extends in the vehicle body front-rear direction. An engine mount bracket 13a of the mount 13 is attached, and a battery bracket 14 is attached to the front of the engine mount bracket 13a by a predetermined distance L.
[0027]
The portion of the front side member 12 to which the engine mount bracket 13a is attached has a reinforcing structure in which the thickness is increased or the cross-sectional area is increased. The reinforcing portion supports a heavy power unit. Yes.
[0028]
The battery tray 11 is divided into two in the opposing direction of the engine mount bracket 13a of the engine mount 13 and the battery bracket 14, and one is used as a first divided base 11a supported by the battery bracket 14, and the other is used. The second split base 11b is supported by the engine mount bracket 13a of the engine mount 13, and the battery 10 is placed across the first split base 11a and the second split base 11b.
[0029]
The size of the mounting table 11 straddling the first divided table 11a and the second divided table 11b is formed in accordance with the size of the battery 10a having the maximum size indicated by the broken line in the drawing, Each of the second divided bases 11a and 11b has, for example, an outer side in the vehicle width direction which is the opposite side a and the side walls of the engine room ER as shown in the first divided base 11a shown in FIG. Standing edge portions 15 are formed on the respective sides c and d excluding the side b, and the standing edge portions 15 serve to prevent the maximum size battery 10a from shifting.
[0030]
And the latching hole 16 is each formed in the intermediate part of the standing edge part 15 arrange | positioned in the front-back direction of the said 1st, 2nd division stand 11a, 11b, and each latching hole 16 is on the front-back side of the battery 10. The lower end flanges 17a of the provided pair of tightening rods 17 are locked, while the upper end threaded portions 17b of the tightening rods 17 are tightened to both ends of the battery clamp 18 disposed on the upper side of the battery 10 via nuts 17c. Thus, the battery 10 is fixed to the battery tray 11.
[0031]
On the mounting surface 11c of the first divided base 11a, a cut-and-raised claw 19 is provided as a battery position restricting means for determining the relative position between the battery 10 and the mounting base 11 according to the battery size.
[0032]
The cut-and-raised claw 19 is formed with a U-shaped opening 19a as shown in FIG. 3, so that a claw tip 19b is formed toward the front of the vehicle body (rightward in the figure). When mounting 10, the cut-and-raised claw 19 is pushed up and raised as shown in FIG. 2, and the bottom front edge of the battery 10 is locked to the cut-and-raised claw 19.
[0033]
When the battery 10a of the maximum size that fits the size of the battery tray 11 is mounted, the cut and raised claw 19 is used without being raised.
[0034]
By the way, by providing the cut-and-raised claw 19 on the first divided base 11a in this way, when the small battery 10 is placed, the battery 10 is supported by being offset toward the second divided base 11b, The weight added to the mount bracket 13a is ensured.
[0035]
With the above configuration, in the battery support structure of the present embodiment, the first divided table 11a obtained by dividing the battery tray 11 into two parts is supported by the battery bracket 14, and the second divided table 11b is supported by the engine mount bracket 13a. The weight of the battery 10 placed across the first and second divided bases 11a and 11b is shared and supported by the battery bracket 14 and the engine mount bracket 13a.
[0036]
Therefore, since the battery weight borne by the engine mount bracket 13a can be reduced as compared with the case where the battery 10 is supported only by the engine mount bracket 13a, it is possible to prevent the engine mount bracket 13a from becoming large.
[0037]
For this reason, as shown in FIG. 4, the engine mount bracket 13a can be prevented from overhanging the front end portion 12a that absorbs the collision energy of the front side member 12 by axial crushing as shown in FIG. The axial crushing K of the front end portion 12a is performed without any trouble, and a function of absorbing collision energy at the time of frontal collision can be ensured. 4 indicates a portion where the front end of the front side member 12 has been retracted due to the axial crush K.
[0038]
At this time, the battery bracket 14 is attached to the front side member 12 in front of the engine mount bracket 13a. However, since the front side member 12 does not have a reinforcing structure at the attachment portion of the battery bracket 14, this battery bracket The mounting portion 14 can also be easily crushed K to absorb collision energy.
[0039]
The weight of the battery 10 is borne by the engine mount bracket 13a via the second divided base 11b. At this time, as shown in FIG. 5, the engine mount 13 is used as a spring and the engine E is passed through the engine mount bracket 13a. A vibration system (dynamic damper) C reaching the vehicle body B is configured.
[0040]
At this time, since the load of the battery 10 borne by the second split base 11b acts on the engine mount bracket 13a, the natural frequency of the engine mount 13 is shifted to the low frequency side.
[0041]
Further, in the present embodiment, the weight of the battery 10 borne by the second divided base 11b changes the share ratio with the first divided base 11a by adjusting the support position of the battery 10, so that the uniqueness of the engine mount 13 can be changed. The frequency can be adjusted with high accuracy.
[0042]
Therefore, by reducing the natural frequency of the engine mount 13 in this way, the peak value P of the resonance frequency of the engine mount 13 is shifted to the peak value P ′ on the low frequency side as shown in FIG. Since this peak value P ′ can be removed from the frequency band N (1 KHz) of gear noise, gear noise transmitted to the vehicle body B side can be effectively reduced.
[0043]
This is because the same function is exhibited even in the idling vibration of the engine E generated in the low frequency region, and this idling vibration can be reduced from being propagated to the vehicle body B side. Anti-vibration function for low-frequency vibration regions such as gear noise can be exhibited.
[0044]
Furthermore, in this embodiment, although the natural frequency of the engine mount 13 can be adjusted, it is possible to prevent the engine mount bracket 13a from becoming large, so that it is possible to reduce the weight and cost, and to reduce the battery 10 Supporting the battery bracket 14 and the engine mount bracket 13a eliminates the need to place the battery directly above the engine mount, thereby increasing the degree of freedom in the layout of the battery 10 in the engine room ER. it can.
[0045]
FIG. 7 shows a second embodiment of the battery support structure of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted.
[0046]
FIG. 7 is an enlarged perspective view corresponding to FIG. 2 showing the first divided table 11a. A downwardly raised and raised claw 20 as a battery position regulating means is formed on the mounting surface 11c of the first divided table 11a. The lower end flange portion 17 a of the tightening rod 17 is locked in a locking hole 21 provided in the cut and raised claw 20.
[0047]
That is, the cut-and-raised claw 20 is formed by forming a flat chevron-shaped opening 20a and bent downward, so that the cut-and-raised claw 20 does not protrude from the mounting surface 11c.
[0048]
Therefore, in the battery support structure of the second embodiment, the lower end flange portion 17a of the tightening rod 17 is locked to the locking hole 21 of the claw 20 when the small battery is mounted. Yes.
[0049]
Since the cut-and-raised claw 20 does not protrude from the placement surface 11c, the cut-and-raised claw 20 does not become an obstacle when the battery 10a having an increased size is mounted. Therefore, not only the change from the large battery 10a to the small battery 10 but also the change from the small battery 10 to the large battery 10a is performed by simply tightening the rod 17 between the lock hole 16 and the lock hole 21. This can be done freely by changing
[0050]
8 and 9 show a third embodiment of the battery support structure of the present invention, in which the same components as those in the first and second embodiments are denoted by the same reference numerals and redundant description is omitted.
[0051]
FIG. 8 is an enlarged perspective view corresponding to FIG. 2 showing the first divided base 11a, and FIG. 9 is an enlarged sectional view taken along the line AA in FIG.
[0052]
In the third embodiment, as shown in FIG. 8, a recessed portion 22 as a battery position restricting means is formed in the vehicle body front-rear direction on the mounting surface 11c of the first split base 11a, and a bottom portion 22a of the recessed portion 22 is formed. A plurality of locking holes 23 are formed at appropriate intervals in the longitudinal direction of the vehicle body, and the lower end flange portion 17a of the tightening rod 17 is locked in each locking hole 23 as shown in FIG.
[0053]
Therefore, in the battery support structure of the third embodiment, since the plurality of locking holes 23 are formed in the bottom portion 22a of the recessed portion 22, one of the plurality of locking holes 23 is selected and tightened. By locking the rod 17, it is possible to accurately adjust the battery weight borne by the engine mount bracket 13 a by changing the fixing position of the battery 10 to be mounted.
[0054]
For this reason, the battery weight borne by the engine mount bracket 13a can be adjusted by changing the fixed position of the battery 10 when the vibration region of idle vibration or gear noise is slightly different depending on various types of vehicles having different engines and gear boxes. The anti-vibration functions such as idle vibration and gear noise can be exhibited.
[0055]
In addition, even in the same vehicle model having the same engine and gear box, the battery 10 having a different size may be used due to cold district specifications or the like. By changing the restriction position of the battery 10 so that the weight ratio of the battery to be borne becomes substantially constant, the natural frequency of the engine mount can be set to a frequency band that can effectively prevent idle vibration, gear noise, and the like. it can.
[Brief description of the drawings]
FIG. 1 is a side view showing a support state of a battery in a first embodiment of the present invention.
FIG. 2 is an enlarged perspective view showing a first divided base in the first embodiment of the present invention.
FIG. 3 is a plan view of battery position regulating means in the first embodiment of the present invention.
FIG. 4 is a side view showing a collision state of the battery support structure according to the first embodiment of the present invention.
FIG. 5 is a model diagram showing a vibration system of the engine mount in the first embodiment of the present invention.
FIG. 6 is a graph showing a comparison of vibration transmissibility in the battery support structure of the present invention with and without the battery weight added to the engine mount bracket.
FIG. 7 is an enlarged perspective view showing a first split base in the second embodiment of the present invention.
FIG. 8 is an enlarged perspective view showing a first divided base in the third embodiment of the present invention.
9 is an enlarged cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
10, 10a Battery 11 Battery tray (mounting table)
11a 1st division stand 11b 2nd division stand 12 Front side member (vehicle body frame member)
13 Engine mount 13a Engine mount bracket 14 Battery brackets 19 and 20 Cut and raised claws (battery position regulating means)
22 recessed portion (battery position regulating means)

Claims (3)

A battery mounting base mounted on a vehicle is divided into a first split base and a second split base, and one first split base is supported by a battery bracket attached to a vehicle body frame member, and the other second split base battery support structure for a vehicle, characterized in that supported on the engine mount bracket attached to the vehicle body frame member at a distance from each other in the battery bracket and the front-rear direction. 2. The battery support structure for a vehicle according to claim 1, wherein the mounting table is provided with battery position regulating means for determining a relative position between the battery and the mounting table according to the battery size. The battery support structure for a vehicle according to claim 2, wherein the battery position restriction means includes a plurality of restriction positions.

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