JP2002220013A - Battery bracket structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle battery bracket structure capable of coping with enlargement of a battery without adding reinforcing members or increasing weight. SOLUTION: The structure of a battery bracket 1 has grooves 7 and 8 provided on both sides of a fastening hole 5 along the cross direction of a vehicle, with the hole serving as a fastening part for the battery bracket 1. This arrangement enables stresses produced by vertical load imposed on the hole 5 to be dispersed to the grooves 7 and 8 to prevent the stresses from concentrating on the joint of a weld nut inside the vehicle body. It is thus possible to cope with enlargement of the battery 13 without adding reinforcing members or causing weight increase due to an increase in plate thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a battery bracket structure for a vehicle supporting a battery tray.

[0002]

2. Description of the Related Art Generally, in a vehicle, as shown in FIG. 4, a battery 13 is fixed to a battery tray 2 installed in an engine room.
A structure for supporting the battery 13 in which the battery 13 is supported by a battery bracket 21 joined to a vehicle body is conventionally known. As an example of such a battery bracket 21, as shown in FIGS. 2 and 5, the battery bracket 21 extends in the vehicle body width direction, and one side (outside of the vehicle body) is joined to the upper surface of the wheel house 14 by spot welding ( A tray mounting piece 23 to which the battery tray 2 is fastened to the inside of the vehicle body with respect to the joint portion, a tray mounting piece 23 which is vertically attached to the other end of the tray mounting piece 23, And a tray support piece 24 joined to the side surface of the tray.

As shown in FIGS. 2 and 7, the battery tray 2 is provided with a tray-side fastening portion 16 having a battery mounting surface 2a formed in a concave shape. The fastening portion 16 is fastened to the battery bracket 21 by fastening bolts 17 screwed to a weld nut 15 (see FIG. 6) provided on the back surface of the tray mounting piece 23, and a side edge of the battery tray 2. The battery mounting surface 2a is installed substantially horizontally by fixing the mounting portion 2b erected on the vehicle to the vehicle body with bolts.

However, the battery 13 as described above
In the support structure of FIG. 1, the repetitive load caused by the acceleration of the battery 13 during the running of the vehicle acts on the fastening portion between the battery bracket 21 and the battery tray 2. The repetitive load (F in FIG. 7) input to the portion in the vertical direction was severe in strength.

As shown in FIG. 8, in the conventional battery bracket 21, when a downward load is applied to the fastening portion with the battery tray 2, the weld nut 15 is connected to the inside of the vehicle body (P 2 in FIG. 8). And the material around the joint is hardened by the heat during welding, and the tray mounting piece 23 tends to bend at the joint of the weld nut 15 inside the vehicle body. In particular, when the load applied by increasing the size of the battery 13 increases, this tendency becomes remarkable, and the tray mounting piece 3 of the battery bracket 21 is connected to the welded nut 15 at the joint portion inside the vehicle body (FIG. 8).
There is a risk of breaking at P2) in the middle.

The above situation is caused by providing the battery bracket 21 with a reinforcing member (not shown) for reinforcing the length direction (the width direction of the vehicle body) of the tray mounting piece 23, or by increasing the thickness of the battery bracket 21. However, any of these measures will cause new problems such as an increase in weight and deterioration of assembly and cost due to the increase in weight. Since the number of welding points to be welded increases, the manufacturing process becomes complicated and the working efficiency is remarkably reduced.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and is intended to cope with a large battery without adding a reinforcing member and increasing the weight. It is an object of the present invention to provide a battery bracket structure that can be used.

[0008]

In order to achieve the above object, according to the present invention, the first aspect of the present invention extends in the width direction of a vehicle body, one side of which is joined to the vehicle body, and which is connected to the vehicle body. A battery for a vehicle comprising: a tray mounting piece to which a battery tray is fastened at a predetermined position inside the vehicle body with respect to the joint portion; In the bracket structure, grooves extending in the front-rear direction of the vehicle body are provided on both sides of the fastening portion of the tray mounting piece with the battery tray.

According to the present invention, the stress caused by the repetitive load applied to the battery bracket in the vertical direction is dispersed in the grooves provided on both sides of the fastening portion of the tray mounting piece with the battery tray. It is possible to prevent stress from being concentrated on the fastening portion.

In order to achieve the above object, according to the second aspect of the present invention, a groove inside the vehicle body of a fastening portion of the tray mounting piece with the battery tray is joined to the fastening portion. It is characterized by being provided close to the nut.

According to the present invention, the repetitive load input to the battery bracket in the vertical direction can be more efficiently dispersed by the above configuration, and the tray mounting caused by the input of the load to the fastening portion can be achieved. It is possible to separate the bent portion of the piece from the joint portion on the inside of the vehicle body of the nut where the stress is concentrated.

In order to achieve the above object, the invention according to claim 3 of the present invention is characterized in that the width of the groove on the inside of the vehicle body at the fastening portion of the tray mounting piece to the battery tray is reduced by the width of the groove on the vehicle outside. It is characterized by being formed wider than the width.

According to the present invention, the repetitive load input to the battery bracket in the up-down direction can be more efficiently dispersed, and the tray mounting caused by the input of the load to the fastening portion can be achieved. It is possible to separate the bent portion of the piece from the joint portion on the inside of the vehicle body of the nut where the stress is concentrated.

According to a fourth aspect of the present invention, in order to achieve the above object, the tray mounting piece straddles the groove inside the vehicle body and the groove outside the vehicle body in the fastening portion with the battery tray. And a plurality of beads extending in the width direction of the vehicle body.

According to the present invention, the bending rigidity in the vehicle body width direction (tray mounting piece length direction) at the fastening portion of the tray mounting piece to the battery tray can be increased by having such a configuration.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A battery bracket structure according to an embodiment of the present invention will be described with reference to FIGS.
First, the outline of the structure of the battery bracket 1 of the present embodiment will be described. As shown in FIGS. 1 and 2, the structure of the battery bracket 1 according to the present embodiment extends in the width direction of the vehicle body, and is joined to the vehicle body on one side and at a predetermined position inside the vehicle body with respect to the joint with the vehicle body. A battery bracket 1 structure of a vehicle comprising a tray mounting piece 3 to which a battery tray 2 is fastened, and a tray supporting piece 4 which is suspended from the other side edge of the tray mounting piece 3 and whose lower end is joined to a vehicle body. In addition, a second groove 7 and a third groove 8 extending in the vehicle front-rear direction are provided on both sides of a fastening hole 5 as a fastening portion of the tray mounting piece 3 with the battery tray 2. This allows
The stress caused by the repetitive load (F in FIG. 7) input in the vertical direction of the battery bracket 1 during running of the vehicle can be dispersed to the second groove 7 and the third groove 8.
By preventing the stress from concentrating in the fastening hole 5, even when the battery 13 (see FIG. 4) is enlarged, it is possible to cope with the situation without adding a reinforcing member and increasing the weight. It is configured as follows.

Next, details of the structure of the battery bracket 1 of the present embodiment will be described. As shown in FIGS. 1 and 2,
The battery bracket 1 is formed of sheet metal.
A tray mounting piece 3 whose length direction is installed substantially parallel to the vehicle body width direction and to which the battery tray 2 is fastened, and a tray which is suspended from the inside of the body of the tray mounting piece 3 and supports the battery tray 2 And a support piece 4. As shown in FIG. 1, the tray support piece 4 has a structure in which rigidity is enhanced by being constituted by a plurality of surfaces, and is provided at the lower end of the tray support piece 4 as shown in FIG. The first joining surface 9 is configured to be spot-welded to a lateral surface of the wheel house 14 of the vehicle body at a plurality of hit points (four hit points in this embodiment).

As shown in FIG. 1, the tray mounting piece 3 has side walls 11a, 11b, and 11c formed on the peripheral edge thereof.
Reference numerals a and 11b extend to the tray support piece 4. Also,
Flanges 12a, 12c are provided on the side walls 11a, 11c, respectively.
c, and in particular, as shown in FIG.
c is formed so as to extend in the vehicle body outer direction, and is configured to support a portion of the battery tray 2 outside the vehicle body. Further, a second joint surface 10 is provided in a portion of the tray mounting piece 3 near the outside of the vehicle body, and the second joint surface 1
As shown in FIG. 2, 0 is spot-welded at a plurality of hit points (four hit points in the present embodiment) to the upper surface of the wheel house 14 of the vehicle body.

As shown in FIG. 1, the tray attachment piece 3 has a predetermined width (W1 in FIG. 1) extending from the joint inside the vehicle body toward the second joint surface 10. One groove 6 is formed substantially at the center position in the width direction of the tray mounting piece 3, and has a structure in which the rigidity in the length direction of the tray mounting piece 3 is increased. In addition, fastening holes 5 as fastening portions are formed in the tray mounting piece 3 on both sides of the first groove 6 and at predetermined positions near the vehicle body inward direction. A weld nut 15 (see FIG. 6) provided coaxially with the fastening hole 5 is joined. And
As shown in FIG. 2, the battery mounting surface 2a of the battery tray 2 is formed in a concave shape to provide the tray-side fastening portion 16, and the fastening is performed by inserting the hole 16a provided in the tray-side fastening portion. The battery tray 2 is fastened to the battery bracket 1 by screwing the bolts 17 to the weld nuts 15 of the tray mounting piece 3 and tightening them. The lower surface of the battery tray 2 in a state where the battery bracket 1 and the battery tray 2 are fastened is supported by the end faces of the flanges 12a, 12c and the side wall 11b of the tray mounting piece 3 of the battery bracket 1. In addition,
The tightening bolt 17 is housed in a concave space formed in the head of the battery tray 2.
(See FIG. 4) The structure prevents interference with the bottom surface.

Further, as shown in FIG.
A second groove 7 and a third groove 8 which are respectively orthogonal to the first groove 6 are provided on both sides of the fastening hole 5 as a fastening portion in the vehicle width direction (the length direction of the tray mounting piece 3). Is formed,
The structure of the battery bracket 1 according to the present embodiment disperses the vertical repetitive load (F in FIG. 7) during traveling of the vehicle body into the second groove 7 and the third groove 8 so that the stress is welded. It is configured to prevent the nut 15 from being concentrated on the joint portion inside the vehicle body.

In the structure of the battery bracket 1, as shown in FIG. 1, the width (W2 in FIG. 1) of the second groove 7 provided inside the vehicle body of the fastening hole 5 as a fastening portion is defined by: By forming the third groove 8 wider than the width (W3 in FIG. 1) of the third hole 8 provided outside the vehicle body of the fastening hole 5 and forming the second groove 7 closer to the fastening hole 5 In addition, it is possible to more efficiently disperse the stress due to the vertical load in the fastening hole 5, and to separate the position of the bent portion (Q in FIG. 3) generated in the tray mounting piece 3 from the fastening hole 5, The configuration is such that the stress is prevented from being concentrated on the joint (P1 in FIG. 3) of the weld nut 15 inside the vehicle body.

As shown in FIG. 1, the tray mounting piece 3 of the battery bracket 1 has a second groove 7 and a third groove 7 between the fastening holes 5 as fastening portions of the first groove 6. A plurality of (two in this embodiment) beads 1 formed so as to straddle the groove 8
The battery bracket 1 has a structure in which the beads 18 increase the rigidity between the second groove 7 and the third groove 8 in the vehicle body width direction (the length of the tray mounting piece 3). It has become. As shown in FIG. 3, even if the tray mounting piece 3 is bent due to a vertical load being applied to the fastening hole 5, the rigidity of the battery bracket 1 is increased by the beads 18. As a result, a flat portion having a width (S in FIG. 3) substantially equal to the length of the bead 18 including the fastening hole 5 is formed in the tray mounting piece 3, and the stress acting on the battery bracket 1 is reduced by the weld nut 15 Of the vehicle body (P1 in FIG. 3).

By changing the number, shape and the like of the beads 18, the battery bracket 1 can be
3 (see FIG. 4).

The operation of the structure of the battery bracket 1 according to the present embodiment in such a configuration will be described. Assuming a state in which the battery bracket 1 is installed on the vehicle body, when an extremely downward downward load (a large load that is considered not to actually act) is applied to the fastening hole 5 as a fastening portion of the battery bracket 1, As shown in FIG. 3, the battery bracket 1 supports the load input to the fastening hole 5 by bending the tray attachment piece 3 and the tray support piece 4 as required. The present battery bracket 1 has a structure in which the second groove 7 and the third groove 8 are provided on both sides of the fastening hole 5 in the vehicle width direction (the length direction of the tray mounting piece 3). Can be dispersed in the second groove 7 and the third groove 8, and the stress can be prevented from being concentrated on the joint of the weld nut 15 inside the vehicle body.

Further, the width (W2 in FIG. 1) of the second groove 7 provided inside the vehicle body of the fastening hole 5 as the fastening portion is changed to the third groove provided outside the vehicle body of the fastening hole 5. The width of the groove 8 (FIG. 1)
By forming the second groove 7 closer to the fastening hole 5 while forming the second groove 7 wider than W3) in FIG.
The stress acting on the fastening hole 5 can be more efficiently dispersed, and the position of the bent portion (Q in FIG. 3) generated in the tray mounting piece 3 is separated from the fastening hole 5 so that the stress is reduced. It is possible to prevent the weld nut 15 from being concentrated on the joint (P1 in FIG. 3) inside the vehicle body.

The structure of the battery bracket 1 is such that the fastening holes 5 as fastening portions of the first grooves 6 of the tray mounting piece 3 are provided.
A plurality of (two in this embodiment) beads 18 formed so as to straddle the second groove 7 and the third groove 8 are provided between the second groove 7 and the second groove 7 in the tray mounting piece 3. Third groove 8
The rigidity in the vehicle body width direction (the length direction of the tray mounting piece 3) is increased, and as shown in FIG. 3, the load on the fastening hole 5 increases, and the tray mounting piece 3 is bent. Even if there is, a flat portion having a width (S in FIG. 3) substantially equal to the length of the bead 18 including the fastening hole 5 is formed in the tray mounting piece 3, and the stress acting on the battery bracket 1 is reduced by the weld nut 15
Can be prevented from being concentrated on the joint (P1 in FIG. 3) inside the vehicle body.

Therefore, the structure of the battery bracket 1 according to the present embodiment is different from that of the first embodiment in that the second groove 7 and the third groove 7
By providing the groove 8, it is possible to disperse the stress acting on the fastening hole 5 into the second groove 7 and the third groove 8, and the stress is generated inside the vehicle body of the weld nut 15. By preventing the battery 13 (see FIG. 4) from being concentrated at the joint, it is possible to cope with the case where the battery 13 (see FIG. 4) is enlarged without increasing the weight due to the addition of the reinforcing member and the increase in the plate thickness. It is possible to suppress a decrease in assemblability of the battery bracket 1 and an increase in manufacturing cost.

Further, since the fastening hole 5 as the fastening portion is formed close to the second groove 7 provided inside the vehicle body of the fastening hole 5, a vertical load is applied to the fastening hole 5. When applied, the stress concentrated on the joint (P1 in FIG. 3) of the weld nut 15 on the inside of the vehicle body can be more efficiently dispersed, and the bent portion (in FIG. Q) is separated from the fastening hole 5 so that the stress acting on the battery bracket 1
5 can be prevented from being concentrated on the joint (P1 in FIG. 3) inside the vehicle body.

Further, the width (W2 in FIG. 1) of the second groove 7 provided inside the vehicle body of the fastening hole 5 as a fastening portion is changed to the third groove 7 provided outside the vehicle body of the fastening hole 5. The width of the groove 8 (FIG. 1)
The width of the fastening hole 5 is wider than W3).
When a vertical load is applied to the
The stress concentrated on the joint (P1 in FIG. 3) inside the vehicle body can be more efficiently dispersed, and the position of the bent portion (Q in FIG. 5
The stress acting on the battery bracket 1 can be prevented from being concentrated on the joint (P1 in FIG. 3) of the weld nut 15 inside the vehicle body.

A plurality of beads 18 formed so as to straddle the second groove 7 and the third groove 8 are provided between the fastening holes 5 as fastening portions of the first grooves 6 of the tray mounting piece 3. The provision of the second groove 7 and the third groove 8 in the tray mounting piece 3
The rigidity in the vehicle body width direction (the length direction of the tray mounting piece 3) is increased, and as shown in FIG. 3, the load on the fastening hole 5 increases, and the tray mounting piece 3 is bent. Even if there is, a flat portion having a width (S in FIG. 3) substantially equal to the length of the bead 18 including the fastening hole 5 is formed in the tray mounting piece 3, so that the stress acting on the battery bracket 1 is reduced. It is possible to prevent the weld nut 15 from being concentrated on the joint (P1 in FIG. 3) inside the vehicle body.

[0031]

According to the first aspect of the present invention, the vehicle body extends in the vehicle width direction, one side of the vehicle body is joined to the vehicle body, and the vehicle body is located at a predetermined position inside the vehicle body with respect to the joint with the vehicle body. In a battery bracket structure for a vehicle, comprising: a tray attachment piece to which a battery tray is fastened; and a tray support piece vertically provided on the other side edge of the tray attachment piece and having a lower end joined to a vehicle body. Since the second groove and the third groove extending in the vehicle front-rear direction (tray mounting piece width direction) are provided on both sides in the vehicle body width direction (tray mounting piece length direction) of the use hole, stress acting on the fastening hole is provided. Can be dispersed in the second groove and the third groove, and the stress is prevented from being concentrated on the joint portion of the weld nut inside the vehicle body, so that even when the battery is enlarged, Increased weight by adding reinforcement members and increasing plate thickness It is possible to associate, an increase in the reduction and manufacturing cost of the assembly of the battery bracket can be suppressed without.

According to the second aspect of the present invention, the fastening hole as the fastening portion is formed close to the second groove provided inside the vehicle body of the fastening hole. ,
When a vertical load is applied to the fastening hole, the stress concentrated on the joint of the weld nut inside the car body can be more efficiently dispersed, and the position of the bent portion generated in the tray mounting piece can be By separating from the hole, the stress acting on the battery bracket can be prevented from being concentrated on the joint of the weld nut inside the vehicle body.

According to the third aspect of the present invention, the width of the second groove provided inside the vehicle body of the fastening hole as the fastening portion is provided outside the vehicle body of the fastening hole. Since the third groove is formed wider than the width of the third groove, when a vertical load is applied to the fastening hole, it is possible to more efficiently disperse the stress concentrated on the joint portion of the weld nut inside the vehicle body. This makes it possible to separate the position of the bent portion generated in the tray mounting piece from the fastening hole, thereby preventing the stress acting on the battery bracket from being concentrated on the joint of the weld nut inside the vehicle body.

According to the fourth aspect of the present invention, the second groove and the third groove are formed so as to straddle between the fastening holes as fastening portions of the tray mounting piece. Since a plurality of beads are provided, the width direction of the vehicle body between the second groove and the third groove in the tray mounting piece (the length direction of the tray mounting piece).
Even if the tray mounting piece is bent due to an increase in the load on the fastening hole due to the increased rigidity, a flat portion having a width substantially equal to the length of the bead including the fastening hole is formed on the tray mounting piece. By being formed, the stress acting on the battery bracket can be prevented from being concentrated on the joint of the weld nut inside the vehicle body.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining a battery bracket structure according to the present embodiment.

FIG. 2 is an explanatory view showing a mounting structure of a battery tray.

FIG. 3 is a diagram illustrating a state in which the battery bracket according to the present embodiment bends when an extreme load is applied to a fastening portion, assuming a state where the battery bracket according to the present embodiment is installed on a vehicle body.

FIG. 4 is an explanatory diagram showing a state in which a battery is installed in an engine room of a vehicle by a support structure including a battery tray and a battery bracket.

FIG. 5 is a perspective view for explaining a conventional battery bracket structure.

FIG. 6 is a perspective view showing a state in which the battery bracket and the battery tray are fastened, and particularly a view showing a weld nut joined to the back surface of the tray mounting piece of the battery bracket.

FIG. 7 is a diagram for describing a vertical repetitive load acting on a fastening portion between a battery bracket and a battery tray during traveling of the vehicle.

FIG. 8 assumes that a conventional battery bracket is installed on a vehicle body, and when an extreme load is applied to a fastening portion,
It is a figure showing the state where the battery bracket concerned bends.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery bracket 2 Battery tray 3 Tray mounting piece 4 Tray support piece 5 Fastening hole (fastening portion) 7 Second groove (fastening portion inside vehicle body groove) 8 Third groove (fastening portion outside vehicle body groove) 13 Battery 18 Bead

Claims (4)

[Claims] A tray mounting piece extending in a width direction of the vehicle body, one side of which is joined to the vehicle body and a battery tray is fastened to a predetermined position inside the vehicle body from a joint with the vehicle body; A battery bracket structure for a vehicle, comprising: a tray support piece that is vertically attached to the other side edge and whose lower end is joined to the vehicle body; A battery bracket structure provided with an extending groove. 2. The battery according to claim 1, wherein a groove inside the vehicle body at a fastening portion of the tray mounting piece with the battery tray is provided close to a nut joined to the fastening portion. Bracket structure. 3. The vehicle according to claim 1, wherein a width of a groove inside the vehicle body at a fastening portion of the tray mounting piece with the battery tray is formed wider than a width of a groove outside the vehicle body. Battery bracket structure. 4. A straddle extending between a groove inside the vehicle body and a groove outside the vehicle body at a fastening portion with the battery tray on the tray mounting piece.
4. The battery bracket structure according to claim 1, wherein a plurality of beads extending in a vehicle width direction are provided.