JP5682136B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box that is mounted on an automobile and supplies power to various in-vehicle electrical components.

  Conventionally, there has been proposed a measure for protecting an electric connection box mounted on an automobile and supplying electric power to various on-vehicle electrical components from an impact at the time of a vehicle collision. For example, in Japanese Patent Application Laid-Open No. 2002-159116 (Patent Document 1), a junction box body is attached to the vehicle body side via a plurality of attachment portions in the vicinity of the rear of a dash panel that partitions an engine room and a vehicle compartment. Electrical connection that allows the connection box body to move from its mounting position on the vehicle body side when the dash panel deformed so that it jumps out into the passenger compartment in the event of a collision collides with the connection box body. The box is described.

  By the way, in the field of automobiles, in recent years, the electrification has progressed, and accordingly, the number of electrical components arranged in the passenger compartment has increased. As a result, the space for disposing the electric junction box in the passenger compartment is becoming narrower, and there may be a case where a vehicle-mounted component such as an EPS (electric power steering) motor is present near the rear of the electric junction box in the front-rear direction of the vehicle. . Therefore, when protecting the electric junction box from the impact at the time of a vehicle collision, it is necessary to consider vehicle-mounted components arranged near the rear of the electric junction box in the front-rear direction of the vehicle.

  However, in the electrical junction box as described in Patent Document 1, the junction box body is merely movable from the mounting position on the vehicle body side, so depending on the magnitude of the impact at the time of collision, the longitudinal direction of the vehicle Thus, the connection box body may fly toward the vehicle-mounted component located near the rear of the connection box body, and the connection box main body may hit the vehicle-mounted component.

JP 2002-159116 A

  The problem to be solved by the present invention is to prevent the junction box body from colliding with the vehicle-mounted component in the event of a vehicle collision even if the vehicle-mounted component is disposed in the vicinity of the junction box body in the longitudinal direction of the vehicle. The object is to provide an electric junction box having a novel structure.

The first aspect of the present invention is provided with one upper mounting portion located on the upper side of the junction box body, and located on the lower side of the junction box main body when the vehicle collides with the upper mounting portion. There is provided at least one lower mounting portion that is set to have a low strength against impact, and there is no electrical connection box other than the upper mounting portion and the lower mounting portion. A bolt insertion hole into which a mounting bolt that is formed and used to attach the upper mounting portion to the vehicle body is inserted is arranged in the vehicle front-rear direction in the vicinity of the junction box body and the junction box body. It extends in a direction to avoid contact at the time of a vehicle collision and opens on the side surface of the upper mounting portion. When all of the lower mounting portion is damaged, it opens on the side surface of the upper mounting portion in the bolt insertion hole. The mounting bolt passes through the part Characterized in that it is configured to be dropped by Rukoto.

  According to the first aspect, when the vehicle collides, all of the lower attachment portions are damaged prior to the upper attachment portion, and the junction box body is attached to the vehicle body side only by the upper attachment portion. Thereby, it can prevent that a junction box main body jumps out in the vehicle front-back direction due to the impact at the time of a collision. As a result, it is possible to prevent the junction box body from coming into contact with vehicle-mounted components arranged in the vicinity of the junction box body in the front-rear direction of the vehicle in the event of a vehicle collision.

  In the state where the junction box body is attached to the vehicle body side only by the upper attachment portion, the junction box body is rotated around the insertion position of the attachment bolt in the upper attachment portion by using the impact at the time of the vehicle collision. I can do it. As a result, it becomes easy to avoid contact of the junction box body with the vehicle-mounted components at the time of a vehicle collision.

  Guide of the bolt insertion hole formed in the upper mounting portion and the mounting bolt inserted in the bolt insertion hole when the connection box body tries to move in the vehicle longitudinal direction with all of the lower mounting portions damaged Based on the action, the junction box body is guided in a direction that avoids contact with the vehicle-mounted components arranged in the vicinity of the junction box body in the vehicle front-rear direction. As a result, it becomes easy to avoid contact of the junction box body with the vehicle-mounted components at the time of a vehicle collision.

  If the mounting bolt moving in the direction in which the bolt insertion hole extends based on the guide action of the bolt insertion hole and the mounting bolt comes out of the side opening of the upper mounting portion in the bolt insertion hole, the junction box body can be dropped. I can do it. As a result, it becomes easy to prevent contact between the junction box body and the vehicle-mounted component at the time of a vehicle collision.

  A second aspect of the present invention is the one described in the first aspect, wherein an impact at the time of a vehicle collision is exerted on the connection box main body, and the lower mounting portion is all damaged. A downward movement allowing portion that allows movement toward the vehicle lower side is formed in the bolt insertion hole.

  According to the second aspect, the junction box body is guided to the vehicle lower side based on the guide action of the mounting bolt and the downward movement allowing portion formed in the bolt insertion hole. As a result, it becomes easy to avoid contact of the junction box body with the vehicle-mounted components at the time of a vehicle collision.

  According to a third aspect of the present invention, there is provided the connection box main body according to the first aspect, wherein an impact at the time of a vehicle collision is exerted on the connection box main body and all of the lower mounting portions are damaged. A side movement allowing portion that allows movement to the side of the vehicle is formed in the bolt insertion hole.

  According to the third aspect, the junction box body is guided to the side of the vehicle based on the guide action of the mounting bolt and the lateral movement allowing portion formed in the bolt insertion hole. As a result, it becomes easy to avoid contact of the junction box body with the vehicle-mounted components at the time of a vehicle collision.

  According to a fourth aspect of the present invention, in the one described in any one of the first to third aspects, a vehicle longitudinal direction of the connection box body when an impact at the time of a vehicle collision is applied to the connection box body. A forward / backward movement-permitting portion that allows movement to the bolt insertion hole is formed in the bolt insertion hole.

  According to the fourth aspect, the junction box body is guided in the vehicle front-rear direction based on the guide action of the mounting bolt and the front-rear movement allowing portion formed in the bolt insertion hole. Thereby, the impact at the time of a vehicle collision is exerted on the lower mounting portion before the upper mounting portion. As a result, only the lower mounting portion can be damaged.

  According to a fifth aspect of the present invention, in the one described in any one of the first to fourth aspects, the bolt insertion hole is one of a vehicle front end portion and a vehicle rear end portion of the junction box body. Thus, it is located on the side opposite to the side to which the impact is applied when the vehicle collides.

  According to the fifth aspect, the insertion position of the mounting bolt in the upper mounting portion can be moved away from the position where the impact at the time of collision is exerted in the connection box body. As a result, the connection box body can be easily rotated around the insertion position of the mounting bolt in the upper mounting portion after all of the lower mounting portion has been damaged by the impact at the time of collision.

  Moreover, it can avoid that the other member which deform | transformed by the impact at the time of a vehicle collision contacts an upper side attaching part. As a result, it becomes easy to cause a state in which the junction box body is attached to the vehicle body side only by the upper attachment portion when the vehicle collides.

  According to the present invention, the bolt mounting hole formed in the upper mounting portion moves the connection box body that is attached to the vehicle body side only by the upper mounting portion because all of the lower mounting portion is damaged by the impact at the time of the vehicle collision. Can be controlled by. As a result, it is possible to prevent contact between the junction box body and the vehicle-mounted component at the time of a vehicle collision.

The model figure which shows the state by which the electric junction box as 1st embodiment of this invention was attached to the vehicle body side from the side. The enlarged view of the upper side attaching part provided in the electrical junction box shown in FIG. The model figure explaining the motion of the connection box main body at the time of the impact at the time of a vehicle collision with respect to the electrical connection box shown in FIG. The model figure which shows the state from which the electric junction box as 2nd embodiment of this invention was attached to the vehicle body side from the side. The model figure which shows the electric junction box shown in FIG. 4 from upper direction. The enlarged view of the upper side attachment part provided in the electrical junction box shown in FIG. FIG. 5 is a model diagram illustrating the movement of the junction box body when an impact at the time of a vehicle collision is applied to the electrical junction box shown in FIG. 4. The model figure which shows the state from which the electric junction box as 3rd embodiment of this invention was attached to the vehicle body side. The enlarged view of the upper side attachment part provided in the electrical junction box shown in FIG. FIG. 9 is a model diagram for explaining the movement of the junction box body when an impact at the time of a vehicle collision is applied to the electrical junction box shown in FIG. 8.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a state in which an electrical junction box 10 as a first embodiment of the present invention is attached to the vehicle body side. The electrical junction box 10 has a structure in which three attachment portions 14, 16, 18 are provided to the junction box body 12. In the following description, the vehicle front-rear direction is the left-right direction in FIG. 1, and the vehicle vertical direction is the vertical direction in FIG.

  More specifically, the junction box body 12 has a structure in which electrical components such as relays and fuses, circuit boards, and the like are accommodated, and has a rectangular block shape as a whole.

  Two lower attachment portions 14, 16 for attaching the connection box main body 12 to the vehicle body side are provided on one surface in the height direction of the connection box main body 12 (downward in FIG. 1). One lower mounting portion 14 is located on one end side in the longitudinal direction of the junction box body 12 (left side in FIG. 1), and a bolt into which a mounting bolt 20 for mounting the lower mounting portion 14 on the vehicle body side is inserted. An insertion hole (not shown) is formed outward in the longitudinal direction from the junction box body 12. The other lower attachment portion 16 is located on the other end side in the longitudinal direction of the junction box body 12 (right side in FIG. 1), and an attachment bolt 22 for attaching the lower attachment portion 16 to the vehicle body side is inserted. A bolt insertion hole (not shown) is formed outward in the longitudinal direction from the junction box main body 12. It should be noted that the strength of the lower mounting portions 14 and 16 with respect to the impact at the time of the vehicle frontal collision is smaller than the strength of the connection box body 12 with respect to the impact at the time of the vehicle frontal collision.

  One upper mounting portion 18 for attaching the connection box body 12 to the vehicle body side is provided on the other surface in the height direction of the connection box body 12 (upward in FIG. 1). The upper mounting portion 18 is formed so as to extend outward in the height direction of the junction box body 12 (upward in FIG. 1) at the other longitudinal end of the junction box body 12, and has a flat plate shape as a whole. .

  The strength of the upper mounting portion 18 against the impact at the time of the vehicle frontal collision is set to be greater than the strength of the lower mounting portions 14 and 16 against the impact at the time of the vehicle frontal collision. It is set smaller than the strength against impact. In addition, as a method of setting the strength against the impact at the time of the vehicle frontal collision of the lower mounting portions 14, 16 as a method of setting the strength against the impact at the time of the vehicle frontal collision of the lower mounting portions 14, 16 Conventionally known various methods such as a method of forming a breakage-inducing hole for inducing in each of the lower mounting portions 14 and 16 and a method of providing a reinforcing rib on the upper mounting portion 18 can be employed.

  As shown in FIG. 2, the upper mounting portion 18 is formed with a bolt insertion hole 26 through which a mounting bolt 24 for mounting the upper mounting portion 18 on the vehicle body side is inserted. The bolt insertion hole 26 is formed so as to penetrate in the overlapping direction on the vehicle body side in the upper attachment portion 18 (the thickness direction of the upper attachment portion 18). Further, the bolt insertion hole 26 extends in a direction in which the separation distance from the upper surface of the connection box body 12 increases toward the one end side in the longitudinal direction of the connection box body 12 (left side in FIG. 1). Is open. Thereby, a pair of guide surfaces 28 extending in a direction away from the upper surface of the connection box main body 12 as it goes to one end in the longitudinal direction of the connection box main body 12 is formed in the bolt insertion hole 26. The bolt insertion hole 26 may extend straight with a substantially constant width dimension as shown in FIG. 2 (a), or as shown in FIG. 2 (b). The width dimension may be narrowed in the vicinity of the opening to the side surface of the attachment portion 18.

  Such an electrical junction box 10 has each attachment portion in a state in which the longitudinal direction of the junction box body 12 substantially coincides with the longitudinal direction of the vehicle immediately behind the dash panel 34 that partitions the engine room 30 and the vehicle compartment 32 in front of the vehicle. 14, 16 and 18 are bolted to the vehicle body side. Thereby, the junction box main body 12 is attached to the vehicle body side. In this state, the bolt insertion hole 26 extends toward the vehicle upper side as going to the vehicle front side, and the mounting bolt 24 is inserted into one end portion (vehicle rear side end portion) of the bolt insertion hole 26 in the extending direction. Yes. Further, an EPS motor 36 as a vehicle-mounted component attached to the vehicle body is disposed immediately behind the junction box body 12. The mounting portions 14, 16, and 18 are bolted to members located near the electrical junction box 10, such as other in-vehicle components, side panels, phosphorus hoses, and mounting brackets provided on them. The

  Next, the movement of the junction box body 12 when the vehicle has a frontal collision will be described with reference to FIG. When the vehicle collides front, the dash panel 34 is pushed to the vehicle compartment 32 side by a rigid member 38 such as an engine disposed in the engine room 30 as shown in FIG. Thereby, the dash panel 34 is deformed so that a part thereof jumps into the passenger compartment 32.

  When the dash panel 34 deformed in this way comes into contact with the junction box body 12, an impact at the time of collision is exerted on the junction box body 12. Since the strength of the upper mounting portion 18 is set to be higher than that of the lower mounting portions 14 and 16 in the case of a vehicle frontal collision, all the lower mounting portions 14 and 16 are ahead of the upper mounting portion 18. fall into disrepair. As a result, the connection box main body 12 is bolted to the vehicle body only by the upper mounting portion 18.

  When an impact at the time of collision is applied to the connection box main body 12 from this state, as shown in FIG. 3B, the connection box is centered on the insertion position of the mounting bolt 24 in the upper mounting portion 18. The main body 12 rotates in the direction approaching the EPS motor 36 (rear side of the vehicle).

  Since the connection box main body 12 is bolted to the vehicle body side at the upper mounting portion 18, the rotation of the connection box main body 12 toward the vehicle rear side is a friction generated between the head of the mounting bolt 24 and the upper mounting portion 18. It is done against the power. Since the connection box main body 12 rotates in the direction opposite to the tightening direction of the mounting bolt 24, the tightening of the mounting bolt 24 may be loosened by rotating the connection box main body 12 as described above. If tightening of the mounting bolt 24 is loosened, the frictional force generated between the head of the mounting bolt 24 and the upper mounting portion 18 is also reduced, so that the connection box body 12 can be easily moved downward in the vehicle as will be described later. .

  Since the upper mounting portion 18 is provided at the vehicle rear end portion of the connection box body 12, the center of gravity of the connection box main body 12 is positioned on the vehicle front side with respect to the insertion position of the mounting bolt 24 in the upper mounting portion 18. ing. Therefore, as long as the dash panel 34 deformed so as to jump out into the vehicle compartment 32 is not in the way, the connection box main body 12 rotates in a direction approaching the EPS motor 36 based on the action of gravity on the connection box main body 12.

  As described above, when the junction box body 12 rotates, the junction box body 12 moves toward the vehicle lower side while resisting the frictional force generated between the head of the mounting bolt 24 and the upper mounting portion 18 by the action of gravity. Try to move. At that time, the mounting bolt 24 is relatively guided from one end side to the other end side of the bolt insertion hole 26 with respect to the upper mounting portion 18 so as to be guided by a pair of guide surfaces 28, 28 formed in the bolt insertion hole 26. Move on. Thereby, the junction box main body 12 moves to the vehicle lower side while moving to the vehicle rear side. As is apparent from this, in the present embodiment, the pair of guide surfaces 28 and 28 constitute a downward movement allowing portion.

  When the mounting bolt 24 that moves relatively from one end side to the other end side of the bolt insertion hole 26 with respect to the upper mounting portion 18 moves to the other end side in the extending direction of the bolt insertion hole 26, the upper side of the bolt insertion hole 26. The bolt 18 is pulled out from the bolt insertion hole 26 through the side opening portion of the mounting portion 18. As a result, the junction box body 12 falls.

  Note that the bolt insertion hole 26 formed in the upper mounting portion 18 is in a direction in which the connection box body 12 moves to the vehicle upper side as it goes to the vehicle front side even when the connection box body 12 rotates in a direction to approach the EPS motor 36. It is desirable to extend. Thereby, even if the dash panel 34 deform | transformed so that it may protrude in the vehicle interior 32 side is contacting the connection box main body 12, the connection box main body 12 can be moved to the vehicle downward side.

  In the electrical junction box 10 having the above-described structure, all of the lower mounting portions 14 and 16 are damaged before the upper mounting portion 18 due to an impact at the time of a frontal collision of the vehicle, and are connected only by the upper mounting portion 18. Since the box body 12 is attached to the vehicle body, it is possible to prevent the connection box body 12 from jumping out to the rear of the vehicle due to an impact at the time of collision. As a result, it is possible to avoid the junction box body 12 from hitting the EPS motor 36 at the time of a frontal collision of the vehicle.

  The connection box body 12 rotates in a direction approaching the EPS motor 36 around the insertion position of the mounting bolt 24 in the upper mounting portion 18, but the rotation occurs between the head of the mounting bolt 24 and the upper mounting portion 18. Because it is done against the friction force, it can absorb the impact at the time of collision. Thereby, it becomes possible to prevent the connection box body 12 from contacting the EPS motor 36.

  The connection box main body 12 moves to the vehicle lower side while moving to the vehicle rear side so as to be guided by the pair of guide surfaces 28 and 28 provided in the bolt insertion hole 26 formed in the upper mounting portion 18. Therefore, it can be avoided that the junction box body 12 contacts the EPS motor 36.

  Since the connection box body 12 is dropped when the mounting bolt 24 is pulled out from the bolt insertion hole 26, the connection box body 12 is sandwiched between the dash panel 34 and the EPS motor 36 which are deformed so as to protrude toward the vehicle compartment 32 side. It can be avoided.

  Since the position of receiving the impact at the time of collision is away from the center of rotation of the junction box body 12, the arm of the moment that causes the junction box body 12 to rotate can be lengthened. This makes it easier to rotate the connection box body 12 even if the force acting in the direction of causing the rotation to the connection box body 12 is small.

  Before the impact at the time of collision is applied to the junction box body 12, the bolt insertion hole 26 formed in the upper mounting portion 18 extends in the direction of moving upward in the vehicle as it goes to the vehicle front side. Even if the connection box main body 12 does not rotate around the insertion position of the mounting bolt 24 in the upper mounting portion 18 due to the impact, the connection box main body 12 can be moved to the vehicle lower side.

  Subsequently, an electrical junction box 40 as a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. In the second embodiment described below and the third embodiment to be described later, members and parts having the same structure as the first embodiment are the same as those in the first embodiment. Detailed description thereof will be omitted by attaching the reference numeral.

  The electrical connection box 40 of this embodiment differs in the upper attachment part 42 compared with the electrical connection box (10) of 1st embodiment. The upper mounting portion 42 of this embodiment is overlapped from above with a base end side plate portion 44 provided integrally with the upper surface of the junction box body 12 and a mounting bracket 46 provided on the vehicle body side. The distal end side plate portion 48 to be fixed is connected by the connecting plate portion 50. Since the connecting plate portion 50 is inclined so as to go to the vehicle upper side as going to the vehicle rear side, the front end side plate portion 48 is located above the vehicle rear end portion in the connection box main body 12. It is desirable that the base end side plate portion 44 is located in the center portion in the longitudinal direction of the junction box body 12. Thereby, it can avoid that the base end side board part 44 and the connection board part 50 are damaged by the impact at the time of a collision. The strength of the upper mounting portion 42 is set higher than that of the lower mounting portions 14 and 16 in terms of impact against a vehicle frontal collision.

  As shown in FIG. 6, the front end side plate portion 48 has a bolt insertion hole 52 through which the mounting bolt 24 for attaching the front end side plate portion 48 to the mounting bracket 52 is inserted in the thickness direction of the front end side plate portion 48. Is formed. The bolt insertion hole 52 extends in the direction of moving outward in the width direction of the connection box body 12 (upper side of FIG. 5) as it goes to one end side in the longitudinal direction of the connection box body 12 (left side in FIG. 5). Opened on the side surface of the portion 48. Thus, a pair of guide surfaces 54 are formed in the bolt insertion holes 52 so as to extend outward in the width direction toward one end in the longitudinal direction. Note that the bolt insertion hole 52 does not need to extend straight with a substantially constant width dimension as shown in FIG. 6A, for example, as shown in FIG. 6B. The width dimension may be narrowed in the vicinity of the opening to the side surface of the tip side plate portion 48.

  In such an electrical junction box 40, the mounting portions 14, 16, and 42 are bolted to the vehicle body side immediately behind the dash panel 34 in a state where the longitudinal direction of the junction box body 12 substantially coincides with the vehicle longitudinal direction. The Thereby, the junction box main body 12 is attached to the vehicle body side. In this state, the bolt insertion hole 52 extends to the right side of the vehicle as it goes to the front side of the vehicle, and the mounting bolt 24 is inserted into one end portion (the vehicle rear side end portion) of the bolt insertion hole 52 in the extending direction. The front end side plate portion 48 is fixed in a state of being superimposed on the mounting bracket 52 from above. Note that an EPS motor 36 is disposed immediately behind the junction box body 12 as in the first embodiment.

  Next, the movement of the junction box body 12 when the vehicle collides head-on will be described. First, as in the first embodiment, the impact at the time of the collision is exerted on the connection box body 12 through the dash panel 34 that is deformed so as to jump out to the passenger compartment 32 side due to the frontal collision of the vehicle. All the lower mounting portions 14 and 16 are damaged before the upper mounting portion 42, and the connection box main body 12 is bolted to the vehicle body only by the upper mounting portion 42.

  When an impact at the time of collision is exerted on the junction box body 12 from this state, as shown in FIG. 7, it is guided by a pair of guide surfaces 54, 54 formed in the bolt insertion hole 52, While the mounting bolt 24 moves relative to the front end side plate portion 48 from one end side of the bolt insertion hole 52 to the other end side, the connection box main body 12 has one longitudinal end centered on the insertion position of the mounting bolt 24. It rotates in the direction of moving toward the right rear. As a result, the connection box body 12 rotates in a direction in which one end in the longitudinal direction moves to the right rear side of the vehicle around the insertion position of the mounting bolt 24 in the front end side plate portion 48 while approaching the vehicle-mounted component 36. As is clear from this, in the present embodiment, the pair of guide surfaces 54 and 54 constitute a side movement allowing portion. Since the connection box body 12 is bolted to the vehicle body side at the front end side plate portion 48 of the upper mounting portion 42, the rotation of the connection box main body 12 as described above is performed between the head of the mounting bolt 24 and the front end side plate portion 48. It is done against the frictional force generated between them.

  In the electrical junction box 40 having the above-described structure, it is formed on the front side plate portion 48 of the upper mounting portion 42 in which the strength against the impact at the time of a frontal collision of the vehicle is set higher than that of the lower mounting portions 14 and 16. Since the bolt insertion hole 52 is extended in a specific direction and opened on the side surface of the tip side plate portion 48, the same effect as in the first embodiment can be obtained.

  Next, an electrical junction box 56 as a third embodiment of the present invention will be described based on FIG. The electrical connection box 56 of this embodiment differs in the bolt insertion hole 58 formed in the upper side attachment part 18 compared with the electrical connection box (10) as 1st embodiment. In the bolt insertion hole 58 of the present embodiment, one end side in the extending direction of the bolt insertion hole (26) formed in the upper mounting portion 18 in the first embodiment is directed to the other end side in the longitudinal direction of the connection box body 12. The shape is extended.

  That is, as shown in FIG. 9, the bolt insertion hole 58 has a longitudinal extension 60 extending in the longitudinal direction of the connection box body 12 and a connection box as it goes to one end side in the longitudinal direction of the connection box body 12. An inclined direction extending portion 62 extending in a direction away from the upper surface of the main body 12 is provided. Accordingly, a pair of horizontal guide surfaces 64 extending in the longitudinal direction of the connection box body 12 is formed in the longitudinal direction extension portion 60, and one end side in the longitudinal direction of the connection box body 12 is formed in the inclined direction extension portion 62. A pair of inclined guide surfaces 66 extending in a direction away from the upper surface of the junction box body 12 as it goes is formed.

  When the upper mounting portion 18 having such a bolt insertion hole 58 is mounted on the vehicle body side, the mounting bolt 24 is located at the end portion of the longitudinally extending portion 60 located on the other end side in the longitudinal direction of the connection box body 12. It is inserted. Further, in the state in which the junction box body 12 is attached to the vehicle body side by the three attachment portions 14, 16, 18, the longitudinal direction of the junction box body 12 substantially coincides with the vehicle front-rear direction. 60 extends in the vehicle front-rear direction, and the inclined direction extending portion 62 extends in the direction of moving upward in the vehicle as it goes to the vehicle front side.

  Next, the movement of the junction box body 12 when the vehicle collides head-on will be described. First, as in the first embodiment, the impact at the time of the collision is exerted on the connection box body 12 through the dash panel 34 that is deformed so as to jump out to the passenger compartment 32 side due to the frontal collision of the vehicle. All of the lower mounting portions 14 and 16 are damaged before the upper mounting portion 18, and the connection box body 12 is bolted to the vehicle body side only by the upper mounting portion 18.

  At that time, as shown in FIG. 10A, the mounting bolt 24 is guided by a pair of horizontal guide surfaces 64 and 64 formed in the longitudinally extending portion 60 of the bolt insertion hole 58. Moves relative to the upper mounting portion 18 from the vehicle rear end of the longitudinally extending portion 60 to the vehicle front end. Thereby, the junction box main body 12 moves to the vehicle rear side by the impact at the time of a collision. As is clear from this, in the present embodiment, the pair of horizontal guide surfaces 64 and 64 constitutes a forward / backward movement allowing portion.

  When the impact at the time of collision is applied to the connection box main body 12 from the state where the mounting bolt 24 is located at the front end of the vehicle in the longitudinally extending portion 60 as described above, as shown in FIG. The connection box main body 12 rotates in the direction approaching the EPS motor 36 (rear of the vehicle) around the insertion position of the mounting bolt 24 in the upper mounting portion 18.

  Since the connection box main body 12 is bolted to the vehicle body side at the upper mounting portion 18, the rotation of the connection box main body 12 toward the vehicle rear side is a friction generated between the head of the mounting bolt 24 and the upper mounting portion 18. It is done against the power. Since the connection box main body 12 rotates in the direction opposite to the tightening direction of the mounting bolt 24, the tightening of the mounting bolt 24 may be loosened by rotating the connection box main body 12 as described above. If tightening of the mounting bolt 24 is loosened, the frictional force generated between the head of the mounting bolt 24 and the upper mounting portion 18 is also reduced, so that the connection box body 12 can be easily moved downward in the vehicle as will be described later. .

  Since the upper mounting portion 18 is provided at the vehicle rear end portion of the connection box body 12, the center of gravity of the connection box main body 12 is positioned on the vehicle front side with respect to the insertion position of the mounting bolt 24 in the upper mounting portion 18. ing. Therefore, as long as the dash panel 34 deformed so as to jump out into the vehicle compartment 32 is not in the way, the connection box main body 12 rotates in a direction approaching the EPS motor 36 based on the action of gravity on the connection box main body 12.

  As described above, when the junction box body 12 rotates, the junction box body 12 moves toward the vehicle lower side while resisting the frictional force generated between the head of the mounting bolt 24 and the upper mounting portion 18 by the action of gravity. Try to move. At this time, the mounting bolt 24 is guided by the pair of inclined guide surfaces 66 and 66 formed in the inclined direction extending portion 62 in the bolt insertion hole 58 so that the mounting bolt 24 extends in the inclined direction with respect to the upper mounting portion 18. 62 moves relatively from one end side to the other end side. Thereby, the junction box main body 12 moves to the vehicle lower side while moving to the vehicle rear side. As is clear from this, in the present embodiment, the pair of inclined guide surfaces 66, 66 constitute a downward movement allowing portion.

  When the mounting bolt 24 that moves from one end side to the other end side of the inclined direction extending portion 62 provided in the bolt insertion hole 58 moves to the other end side of the inclined direction extending portion 62, the mounting bolt 24 moves in the inclined direction extending portion 62. It escapes from the bolt insertion hole 58 through the side opening portion of the upper mounting portion 18. As a result, the junction box body 12 falls.

  In the electrical junction box 56 having the structure as described above, the bolt insertion hole 58 formed in the upper mounting portion 18 extends in a specific direction and opens on the side surface of the upper mounting portion 18. The same effect as the form can be obtained.

  When all of the lower mounting portions 14 and 16 are damaged due to the impact at the time of the collision, the connection box main body 12 moves to the vehicle rear side, so that the impact at the time of the collision is not easily transmitted to the upper mounting portion 18. As a result, the upper mounting portion 18 can be made stronger than the lower mounting portions 14 and 16 with respect to an impact at the time of a vehicle frontal collision.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description in embodiment. For example, the inclined extension portion 62 formed in the bolt insertion hole 26 in the first embodiment and the bolt insertion hole 58 in the third embodiment is subjected to an impact at the time of a vehicle frontal collision and is thus connected to the junction box body 12. Need only extend in the direction of moving upward in the vehicle as it goes to the front side of the vehicle in a state where it is attached to the vehicle body side only by the upper attachment portion 18, and the electrical connection boxes 10, 56 have three attachment portions 14, In the state attached to the vehicle body side by 16, 18, it may extend upward in the vertical direction. In the second embodiment, a forward / backward movement allowing portion may be formed in the bolt insertion hole 52.

  In the first to third embodiments, the frontal collision of the vehicle refers to a collision in which the junction box body moves toward the rear of the vehicle due to an impact at the time of the collision, and is not limited to a collision from the front of the vehicle. For example, a collision from a direction inclined with respect to the longitudinal direction of the vehicle is also included.

  In the first to third embodiments, the case where the junction box main body is protected from the impact at the time of the frontal collision of the vehicle has been described, but in the present invention, the junction box main body is protected from the impact caused by the collision from the rear side of the vehicle. It also includes the case of protection.

10: Electrical junction box, 12: Junction box body, 14: Lower mounting portion, 16: Lower mounting portion, 18: Upper mounting portion, 24: Mounting bolt, 26: Bolt insertion hole, 28: Guide surface (moving downward) (Allowable part), 30: engine room, 32: vehicle compartment, 34: dash panel, 36: EPS motor (vehicle-mounted parts), 54: guide surface (side movement allowable part), 64: horizontal guide surface (permitted to move back and forth) Part)

Claims (5)

One upper mounting portion is provided on the upper side of the connection box body, and the strength against impact at the time of a vehicle collision is set lower than the upper mounting portion located on the lower side of the connection box main body. At least one lower attachment portion is provided, and there is no attachment portion other than these upper attachment portion and lower attachment portion,
A bolt mounting hole formed in the upper mounting portion and used for mounting a mounting bolt used when mounting the upper mounting portion to the vehicle body is a vehicle-mounted component disposed in the vicinity of the junction box body in the vehicle front-rear direction. Extending in a direction to avoid contact of the junction box body at the time of a vehicle collision and opening on the side surface of the upper mounting portion;
When all of the lower mounting portion is damaged, the bolt can be dropped by passing the mounting bolt through a portion of the bolt insertion hole that is open on the side surface of the upper mounting portion. Connection box.   The bolt insertion hole has a downward movement permitting portion that allows the connection box main body to move downward in the vehicle in a state where an impact at the time of a vehicle collision is applied to the connection box main body and all of the lower mounting portion is damaged. The electrical junction box according to claim 1 formed.   A side movement allowing portion that allows the connection box body to move toward the side of the vehicle in a state where an impact at the time of a vehicle collision is applied to the connection box body and all of the lower mounting portion is damaged. The electrical junction box according to claim 1, wherein the electrical junction box is formed in a hole.   The bolt insertion hole is formed with a forward / backward movement allowing portion for allowing movement of the connection box body in the vehicle longitudinal direction when an impact at the time of a vehicle collision is applied to the connection box body. The electrical junction box according to any one of the above.   The bolt insertion hole is located on either the vehicle front end portion or the vehicle rear end portion of the junction box body on the side opposite to the side to which an impact is applied when a vehicle collides. The electrical junction box according to claim 1.

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