JP2014073757A - Fastening structure for vehicular electric components - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening structure for vehicular electric components capable of avoiding mutual damage of components by making fastening releasable even when external inputs act from every direction on a mutual fastened part of an electronic component with an other component.SOLUTION: In an inverter 11 and an electronic control unit 14 fastened mutually, a slit 26 between two protruded pieces 25 and 25 arranged on the side of the electronic control unit 14 and being deformable to an external input is checked with and superimposed on a screw hole 13 of a boss part 12 of the inverter 11, and the two protruded pieces 25 and 25 are held around the screw hole 13 and fastened and fixed in a sandwiched state by means of a washer faced bolt 30. To an external input, the slit 26 comes out from the bolt shaft part directly or through deformation of the two protruded pieces 25 and 25, and the fastened part separates into the inverter 11 and the electronic control unit 14.

Description

  The present invention relates to a fastening structure for electric parts for a vehicle, and more particularly to a structure for fastening other parts to an electric part fixed to a member on a vehicle body side.

  As a fastening structure for in-vehicle electric components in a front compartment of a vehicle, for example, one shown in Patent Document 1 is known.

  This electrical component fastening structure is provided with a slit opened on the front side of the vehicle at the fastening part of the inverter fixed on the mounting table on the vehicle body side, and the inverter is bolted onto the mounting table through this slit, so that a front collision occurs. With respect to the external input, the slit comes out of the bolt shaft portion and enables the inverter to move backward.

JP 2009-90818 A

  In the disclosed technique of Patent Document 1, since the direction of removal is specified to the rear of the vehicle by setting the slit formation direction, the collision input is different from the vehicle front-rear direction, for example, obliquely forward of the vehicle or from the side of the vehicle. For this input, the slit does not come out of the bolt shaft portion, and the fastening portion of the inverter cannot be detached from the mounting table.

  Therefore, in the present invention, when an electrical part and another part are fastened to each other and mounted on the vehicle body, even if an external input is applied to the fastening part between these parts from all directions, The present invention provides a fastening structure for an electrical component for a vehicle that can be fastened by input and can avoid mutual damage.

  According to the fastening structure for an electric component for a vehicle of the present invention, the electric component and another component are fastened to each other and mounted and fixed to a member on the vehicle body side.

  One of the electrical component and the other component is provided with two projecting pieces that can be deformed with respect to an external input adjacent to the fastening portion.

  The other part has an opening through which the shaft member is inserted.

  Then, the slit between the two projecting pieces is collated with the opening, the electrical component and the fastening portion between the other components are overlapped, and a shaft member is passed through the slit and the opening, and the shaft member passes the 2 The main feature is that two projecting pieces are sandwiched and fixed around the opening.

According to the present invention, the slit between the two protruding pieces is easy to be removed from the shaft member for the input in the extending direction of the protruding piece, and the two protruding pieces are the plate for the external input in the sandwiching direction. It is possible to bend and deform in the direction in which the slit is expanded in a state where at least one protrusion piece is sandwiched with respect to the external input in the direction that intersects the shaft member in the thickness direction.

  As a result, even when an external input is applied to the fastening part between the electrical part and another part from any direction, the slit between the two protruding pieces and the shaft member are separated from each other, and these parts are damaged at the fastening part. Can be avoided.

The schematic plane explanatory drawing of the vehicle body front part which shows the mounting state of the electrical component made into the object of this invention. The perspective view seen from the vehicle body diagonally front which shows one Embodiment of this invention. The side view seen from the body side showing one embodiment of the present invention. The perspective view which expands and shows the fastening part of electrical components mutual. The perspective view which shows the state which removed the fastening bolt of FIG. The top view which expands and shows two protrusion pieces. The schematic side view explaining the behavior of the electrical component at the time of frontal collision of a vehicle. The schematic side view explaining the behavior of the electrical component at the time of frontal collision of a vehicle. The schematic side view explaining the behavior of the electrical component at the time of frontal collision of a vehicle. The side view explaining the omission behavior of two projection pieces. The perspective view which shows the modification which changed the extending direction of two protrusion pieces in (A)-(C).

  Hereinafter, an embodiment of the present invention will be described in detail with reference to an example of an electric component, an inverter that is a high-voltage component, and another component that is an electronic control unit.

  FIG. 1 schematically shows, as an example, a left front portion of a front compartment (motor room) in a hybrid vehicle or an electric vehicle in plan view, and a front end of a front side member 1 extending in the vehicle front-rear direction is shown in FIG. A bumper reinforcement 2 extending in the vehicle width direction is connected via a stay 3.

  The left and right front side members 1 are extended with support members 4 for mounting air conditioning condensers, radiator cores, and the like, and the front side members are formed at corners formed by the support members 4 and the front side members 1. A mount bracket 5 is coupled on the member 1.

  The mount bracket 5 is disposed so as to project substantially horizontally toward the vehicle center side, and an inverter 11 as an electrical component and an electronic control unit 14 as a separate component are collectively disposed on the mount bracket 5. It is installed.

  Specifically, an inverter 11 that is a high-voltage component is placed on the mount bracket 5 and fastened and fixed, and an electronic control unit 14 that is smaller than the inverter 11 is externally attached to the top surface of the inverter 11 as will be described later. The arrangement is fastened and fixed so as to be detachable with respect to the input.

  Both the inverter 11 and the electronic control unit 14 are protected by a casing. In this embodiment, as shown in FIG. 2, a bracket 21 is attached to the lower surface of the casing of the electronic control unit 14, and the electronic control is performed via the bracket 21. The unit 14 is fastened and fixed to the upper surface of the casing of the inverter 11 so as to be detachable from an external input.

The bracket 21 includes leg pieces 23 on both sides in the vehicle width direction of a substantially flat stationary surface 22 on which the electronic control unit 14 is placed, and the electronic control unit 14 is spaced above the inverter 11 at the leg height of the leg piece 23. Like to do.

  The leg pieces 23 have different heights on both sides in the vehicle width direction, and different heights in the vehicle front-rear direction, so that the stationary surface 22 is configured as an inclined surface having a lower vehicle width direction outer side and a higher vehicle rear side. doing. As a result, the electronic control unit 14 mounted on the stationary surface 22 can respond to the request for a mounting posture that is lower left and higher rearward (see FIG. 3).

  On the lower edge of the leg piece 23, a flange 24 as a fastening portion is bent to the side, and two projecting pieces 25 that can be deformed with respect to an external input are provided adjacent to the flange 24. .

  The pair of projecting pieces 25 are extended at a spacing interval in which a slit 26 therebetween is a width into which a fixing seat bolt 30 can be inserted as a shaft member described later.

  As shown in FIG. 6, the slit 26 is formed by inclining the inner extension of the adjacent projecting pieces 25 at a required opening angle δ and between the projecting pieces 25, 25 on the tip side of the projecting piece 25. It is formed as a slit width that gradually expands toward it.

  On the other hand, on the upper surface of the casing of the inverter 11, as shown in FIGS. 4 and 5, a boss portion 12 as a fastening portion protrudes at a position corresponding to each of the pair of protruding pieces 25. A screw hole 13 as an opening is formed on the top surface of the boss portion 12.

  Then, the slit 26 between each pair of protruding pieces 25, 25 is collated with the screw hole 13, and a seated bolt 30 as a shaft member is inserted and screwed into the slit 26 and the screw hole 13. Two projecting pieces 25, 25 are sandwiched around the screw hole 13 on the boss portion 12 by a bolt 30 with a seat and fastened and fixed.

  In the example shown in FIG. 2, the flange 24 of the leg piece 23 on the inner side in the vehicle width direction (vehicle center side) is formed in series along the front-rear direction of the leg piece 23, and a pair of projection pieces on the front and rear portions thereof. On the other hand, the flange 24 of the leg piece 23 on the outer side in the vehicle width direction is formed at the front portion of the leg piece 23, and a pair of projecting pieces 25 are formed here.

  In other words, in the present embodiment, the bracket 21 is summed with one front portion on the outer side in the vehicle width direction and two front and rear portions on the inner side in the vehicle width direction by the pair of projecting pieces 25 and the boss portion 12 on the inverter 11 side. It is fastened and fixed at three points.

  On the stationary surface 22 of the bracket 21 described above, an abutting arm 27 that protrudes rearward of the vehicle from the electronic control unit 14 is extended at the rear edge, and the rear side edge of the stationary surface 22 on the outer side in the vehicle width direction. Further, an abutting arm 28 extending outward in the vehicle width direction from the electronic control unit 14 is extended.

  Further, the electronic control unit 14 described above is formed in a flat rectangular shape, and a flange piece 15 for fastening is formed one step lower on the front and rear edges of the bottom surface of the housing and is extended in the front-rear direction. is there.

  These flange pieces 15 are superposed on the stationary surface 22 of the bracket 21 and fastened and fixed by a stud bolt 18 projecting from the stationary surface 22 and a nut 19.

  Bolt insertion holes 16 are formed on the left and right sides of the rear flange piece 15, while bolt insertion slits 17 are formed on the left and right sides of the front flange piece 15.

The bolt insertion slit 17 has a projecting piece 17a that can be deformed to the side by an external input.
Is formed in the vicinity of the side edge of the flange piece 15 as much as possible. The bolt insertion slit 17 and the projecting piece 17a may be structured to be a relationship between the pair of projecting pieces 25 and 25 in the leg piece 23 of the bracket 21 and the slit 26 therebetween.

  On the other hand, the stud bolt 18 on the stationary surface 22 is set at a diagonal position of the front and rear flange pieces 15, and the bolt insertion hole 16 on either the left or right side of the rear flange piece 15 is paired with this. The front flange piece 15 at the corner position is fastened and fixed at a position corresponding to the bolt insertion slit 17 on either the left or right side.

  That is, in this embodiment, since the collective module of the inverter 11 and the electronic control unit 14 is mounted on the front left side of the front compartment, the front stud bolt 18 of the stationary surface 22 is connected to the front flange piece 15. The rear stud bolt 18 is set at a position corresponding to the bolt insertion hole 16 on the right side of the rear flange piece 15 at a position corresponding to the left bolt insertion slit 17. In the right-side mounting specification, these stud bolts 18, the bolt insertion holes 16 and the bolt insertion slits 17 have an arrangement relationship opposite to that described above.

  In the example shown in FIGS. 2 and 3, the bolt insertion hole 16 and the bolt insertion slit 17 described above are formed on the left and right sides of the front and rear flange pieces 15, respectively, so that the electronic control unit 14 is mounted on the left side and on the right side. Although it can be shared with the specification, when it is dedicated, it is only necessary to set one bolt insertion hole 16 and one bolt insertion slit 17 at diagonal positions.

  According to the present embodiment having the above-described configuration, the slit 26 between the two projecting pieces 25, 25 is easily detached from the shaft portion of the seated bolt 30 with respect to external input in the extending direction of the projecting piece 25. Further, the two projecting pieces 25, 25 are bent and deformed in the plate thickness direction with respect to the external input in the sandwiching direction, and at least one projecting piece with respect to the external input in the direction intersecting with the shaft portion of the seated bolt 30. Bending deformation is possible in the direction in which the slit 26 expands in a state where 25 is sandwiched.

  7 to 9 show the behavior of the inverter 11 and the electronic control unit 14 at the time of a frontal collision of the vehicle.

  When the vehicle body strength members 1 to 4 at the front of the front compartment shown in FIG. 1 are deformed and moved backward due to a frontal collision of the vehicle, the mount bracket 5 coupled to the front side member 1 is also moved backward together.

  Along with this, the inverter 11 and the electronic control unit 14 move backward together with the mount bracket 5 as shown by an arrow a1 in FIG.

  In the process of this backward movement, as shown in FIG. 8, when the abutting arm 27 projecting rearward of the bracket 21 strikes the vehicle body side member B, the fastening portion between the inverter 11 and the electronic control unit 14 is in the vehicle longitudinal direction. Collision input works.

  In this fastening portion, the collision input acts on the two projecting pieces 25, 25 sandwiched between the boss portion 12 by the seated bolt 30 as described above in a direction intersecting with the shaft portion of the seated bolt 30.

  At this time, at least the rear projecting piece 25 of the two projecting pieces 25, 25 is bent and deformed by the bolt shaft portion toward the rear of the vehicle in which the slit 26 expands while being sandwiched as described above, and the slit from the bolt shaft portion. 26 comes out.

  As a result, as shown in FIG. 9, the bracket 21 is detached from the upper surface of the inverter 11 together with the electronic control unit 14, and the movement of the electronic control unit 14 in the backward direction is restrained by the vehicle body side member B. Backward movement in the direction is allowed.

  As a result, the upper surface of the casing of the inverter 11, which is a high-voltage component, is prevented from being damaged at the fastening portion of the bracket 21, and similarly, the casing of the electronic control unit 14 can be prevented from being damaged.

  For this reason, since it is not necessary to make the housing | casing of the inverter 11 into a rigid body structure more than necessary, the weight reduction of the inverter 11 can be achieved.

  When a vehicle body side member such as a hood ridge member is deformed due to an oblique forward collision or a side collision of the vehicle, the vehicle body side member interferes with the abutting arm 28 projecting outward in the vehicle width direction of the bracket 21 described above, A collision input acts on the fastening portion between the inverter 11 and the electronic control unit 14 in the vehicle width direction.

  In this fastening portion, on the side of the leg piece 23 on the outer side in the vehicle width direction of the bracket 21, the slit 26 between the two projecting pieces 25, 25 sandwiched on the boss portion 12 by the abutting arm 28 as described above is a bolt. Collision input acts in the direction of coming off the shaft.

  As a result, the slit 26 comes out of the bolt shaft portion, and as shown by a chain line 21A in FIG. 10, one of the leg pieces 23A of the bracket is detached from the upper surface of the inverter 11, and the other leg piece 23A is fastened at the vehicle center side. The electronic control unit 14 is allowed to move relative to the inverter 11 in the vehicle width direction by buckling and deforming in the vehicle width direction in the state.

  Thereby, it is possible to avoid mutual damage at the fastening portion between the inverter 11 and the electronic control unit 14.

  Further, when a collision input acts on the front end portion of the bracket 21 at the time of a frontal collision of the vehicle, the two projecting pieces 25 and 25 sandwiched on the boss portion 12 by the seated bolts 30 are in the thickness direction. And the slit 26 comes out of the bolt shaft.

  As a result, it is possible to avoid that the left and right leg pieces 23B of the bracket are detached from the upper surface of the inverter 11 and are damaged at the fastening portion between the inverter 11 and the electronic control unit 14, as indicated by a chain line 21B in FIG. it can.

  In this case, if an abutting arm similar to the abutting arms 27 and 28 is provided on the stationary surface 22 of the bracket 21 so as to protrude toward the front of the vehicle, the above-described detachment input of the bracket 21 can be easily captured.

  As described above, according to the configuration of the present embodiment, even when a collision input (external input) acts on the fastening portion between the inverter 11 and the electronic control unit 14 from any direction, the slit between the two protruding pieces 25 and 25. Therefore, it is possible to avoid the parts 26 and the fixing seat bolts 30 from being separated from each other and the parts being damaged at the fastening portion.

  Further, in the structure of the present embodiment, when a collision input acts directly on the inner side in the vehicle width direction in the electronic control unit 14 at the time of a side collision of the vehicle, the protrusion piece 17a of the front flange piece 15 causes the bolt insertion slit 17 to expand. Deforms in the opening direction.

As a result, the bolt insertion slit 17 is detached from the stud bolt 18, and the electronic control unit 14 rotates on the bracket 21 inward in the vehicle width direction around the stud bolt 18 to which the rear flange piece 15 is fastened. And it is possible to avoid damage to itself.

  Here, the protruding piece 25 of the bracket 21 moves up and down depending on the mounting form of the electronic control unit 14 with respect to the inverter 11, for example, as shown in FIGS. It is possible to cope with external input in any direction by setting the direction, or obliquely up and down as shown in FIG.

  Moreover, in this embodiment, it is set as the structure fastened to the upper surface of the inverter 11 via the bracket 21 attached to the electronic control unit 14 as described above, and the electronic control device 14 is attached from the upper surface of the inverter 11 by the leg pieces 23 of the bracket 21. They are spaced apart.

  Thereby, it is easy to induce the inertial force of the electronic control unit 14 at the time of a vehicle collision, the falling deformation (buckling deformation) of the leg piece 23 or the bending deformation of the projection piece 25 in the plate thickness direction by the collision input, and the above-described seating is provided. The detachment action from the bolt 30 can be advantageously performed.

  Further, the slit 26 between the two projecting pieces 25, 25 has a slit width gradually expanding toward the tip end side of the projecting piece 25. Thereby, with respect to the input direction parallel to the extending direction of the projecting piece 25, it is easy to come off from the bolt shaft portion, and with respect to the input direction in which the bolt shaft portion orthogonal to the extending direction engages perpendicularly. The side edge of the slit 26 is easily slipped in the pulling direction with respect to the bolt shaft portion, and deformation or breakage of the protruding piece 25 is easily induced.

  Further, in the present embodiment, since the two projecting pieces 25 are extended in a direction intersecting the vehicle longitudinal direction, protection measures for the inverter 11 and the electronic control unit 14 at the time of a frontal collision of a vehicle having a high tendency to collide. It is effective as

  In addition, since the above-described anti-collision release function is added to the fastening portion between the inverter 11 that is a high-voltage component and the electronic control unit 14 in this way, it is possible to advantageously take protective measures for these important electrical safety components. .

  In addition, multiple electrical components, or electrical components and other components can be fastened together, and these can be integrated and mounted, so that the limited mounting space can be used effectively, and each dedicated mounting component Can be advantageously obtained in terms of design and cost.

  In the above embodiment, the electronic control unit 14 is fastened to the upper surface of the inverter 11 via the bracket 21. However, without using the bracket 21, a protruding piece and a slit structure are set in the electronic control unit 14, It is also possible to fasten directly to the inverter 11.

  Moreover, although the inverter 11 was illustrated as an electrical component, it may be another electrical component, and another component may be an electrical component other than the electronic control unit 14 in the previous period or another component mounted in the motor room. .

  Furthermore, it is also possible to apply the fastening structure of the present invention to a fastening portion between the inverter 11 and the vehicle body side member such as the mount bracket 5 in the embodiment.

  Further, the present invention is effective for mutual fastening of various electrical parts and other parts in addition to the above-described embodiment, and the fastening direction is not limited to the vertical direction, and is set to the vehicle longitudinal direction and the vehicle width direction. Is also possible.

  Further, the relationship between the opening 13 and the two protruding pieces 25 is opposite to that described above, that is, the opening 13 is placed on another component 14 side, and the two protruding pieces 25 are electrically connected to the slit 26 therebetween. It can also be provided on the component 11 side.

1. Front side member (vehicle body side member)
5 ... Mount bracket (vehicle body side)
11 ... Inverter (electric part)
12 ... Boss part (fastening part)
13 ... Screw hole (opening)
14 ... Electronic control unit (another part)
21 ... Bracket 23 ... Leg piece 24 ... Flange (fastening part)
25 ... Projection piece 26 ... Slit 30 ... Seated bolt (shaft member)

Claims (6)

It is a structure in which electrical parts and other parts are fastened to each other and mounted on a member on the vehicle body side.
While either one of the electrical component and the other component has two protruding pieces that can be deformed with respect to an external input at its fastening portion,
The other part has an opening in its fastening part,
The slit between the two projection pieces is collated with the opening, a shaft member is passed through the slit and the opening, and the two projection pieces are sandwiched and fixed around the opening by the shaft member. Fastening structure for electric parts for vehicles.   2. The fastening of a vehicular electrical component according to claim 1, wherein an extending direction of the protruding piece is set in a vehicle front-rear direction, a vehicle width direction, or a vertical direction according to an input direction of the external input. Construction.   The fastening portion of the one part is provided in a bracket attached to the one part, and the bracket includes a leg piece for separating one part from the other part. Item 3. A fastening structure for an electrical component for a vehicle according to item 1 or 2.   The width of the slit between the two projecting pieces is formed so as to gradually widen toward the tip side of the projecting piece. The electric component for a vehicle according to any one of claims 1 to 3, Fastening structure.   The fastening structure for an electrical component for a vehicle according to any one of claims 1 to 4, wherein the two projecting pieces extend in a direction intersecting with the vehicle longitudinal direction. 6. The inverter as the other component is a high-voltage component fixed to a vehicle body strength member, and the one component is an electronic control unit fastened to a casing of the inverter. The fastening structure of the electrical component for vehicles as described in any one of these.

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