JP6699512B2 - In-vehicle structure of electronic equipment - Google Patents

Description

  This specification discloses a vehicle-mounted structure of an electronic device.

  As one of the vehicle-mounted structures of electronic devices, a structure in which a gap is provided below the electronic device and the electronic device is fixed to a vehicle by a bracket may be adopted (for example, Patent Document 1). The in-vehicle structure is adopted to protect the electronic device from the vibration of the vehicle. An anti-vibration bush is provided at the portion of the bracket that fixes the electronic device.

JP, 2014-114870, A

  On the other hand, in a vehicle-mounted electronic device, a case in which not only the upper surface of the case main body but also the lower surface is opened may be adopted in consideration of convenience of mounting the components inside the case and convenience of maintenance. . The opening on the upper surface of the case body is covered with the upper cover, and the opening on the lower surface is covered with the lower cover. When an electronic device including a case body whose lower surface opening is covered with a lower cover is fixed to a vehicle by a bracket with a gap below, the following event may occur during a vehicle collision. That is, the bracket is deformed by the impact of the collision, and the electronic device strongly interferes with the bracket or a device below the electronic device. The strong interference deforms the case body and the lower cover, opening the boundary between the case body and the lower cover. If the boundary between the case body and the lower cover is opened, foreign matter generated by the collision may enter the case. The technique disclosed in the present specification relates to a vehicle-mounted structure of an electronic device that is fixed to a vehicle with a gap below the lower cover, and prevents the boundary between the case body and the lower cover from being opened due to the impact of a collision.

  As described above, in the electronic device targeted for the vehicle-mounted structure disclosed in the present specification, the lower cover covers the opening of the lower surface of the case body, and is fixed to the vehicle with a gap below the lower cover. . The lower cover is fixed to the case body with a plurality of bolts. It is the boundary between the case body and the lower cover between the adjacent bolts that opens due to the impact of the collision. Therefore, in the vehicle-mounted structure disclosed in this specification, the protector is attached to the case body of the electronic device. The protector is curved from the side surface of the case body along the lower cover so as to cover two adjacent bolts of the plurality of bolts fixing the lower cover and a boundary between the case body and the lower cover between the two bolts. There is. A part of the lower cover is in contact with the upper surface of the portion of the protector extending below the lower cover.

  The protector prevents the boundary between the lower cover and the case body between the two bolts from opening in the event of a collision. Details of the technology disclosed in the present specification and further improvements will be described in “Mode for Carrying Out the Invention” below.

It is a perspective view which shows the example of the device layout in a front compartment. It is a side view of a transaxle and a power converter fixed to the upper part. It is an exploded view of the case of a power converter. FIG. 4 is an enlarged side view of a range indicated by reference numeral IV in FIG. 2. FIG. 5 is a sectional view taken along the line VV of FIG. 4.

  An on-vehicle structure according to an embodiment will be described with reference to the drawings. The vehicle-mounted structure of the embodiment is applied to a power converter that generates drive power for a traveling motor in a hybrid vehicle. The power converter is mounted in the front compartment of the vehicle. FIG. 1 shows a perspective view of the front compartment 91 of the hybrid vehicle 90. FIG. 1 is a perspective view showing a device layout in the front compartment 91. The front compartment 91 of the hybrid vehicle 90 is equipped with the engine 7, the transaxle 3, and the power converter 10. Although there are other components mounted in the front compartment, the description thereof will be omitted. In the coordinate system in the figure, the F axis indicates the front of the vehicle, the V axis indicates the upper side of the vehicle, and the H axis indicates the vehicle width direction. In FIG. 1, the engine 7, the transaxle 3, and the power converter 10 are schematically illustrated.

  The transaxle 3 accommodates two traveling motors 31, 32, a differential gear 33, and a power distribution mechanism. The transaxle 3 and the engine 7 are connected, and the output shaft of the engine 7 is connected to the power distribution mechanism. The output shafts of the two motors 31 and 32 are also connected to the power distribution mechanism. The power distribution mechanism appropriately combines and outputs the output torque of the engine 7 and the output torque of the two motors 31 and 32. The combined torque is transmitted to the wheels via the differential gear. Further, the power distribution mechanism may distribute the output torque of the engine 7 to the motor 31 and the wheels. In that case, the hybrid vehicle 90 generates electric power by the motor 31 while traveling with the driving force of the engine 7. Since the traveling motors 31 and 32 are housed in the transaxle 3, the housing of the transaxle 3 can also be referred to as a motor housing.

  The engine 7 and the transaxle 3 are connected in the vehicle width direction and are suspended between the two side members 92 of the vehicle. Note that in FIG. 1, one of the two side members 92 is a blind spot and is not visible.

  A power converter 10 is fixed on the transaxle 3. The power converter 10 is fixed above the transaxle 3 by a front bracket 5 and a rear bracket 6. The power converter 10 is a device that converts DC power of a main battery (not shown) into driving power for the motors 31 and 32. The power converter 10 also has a function of converting AC regenerative power generated by the motor 31 into DC power. The regenerative power converted to DC power is used to charge the main battery.

  FIG. 2 shows a side view of the transaxle 3 and the power converter 10 fixed thereon. As described above, the transaxle 3 houses the two motors 31, 32, the differential gear 33, and the power distribution mechanism. The output shafts 31a and 32a of the two motors 31 and 32 and the shaft 33a of the differential gear 33 extend parallel to the vehicle width direction. As shown in FIG. 2, the three shafts 31a, 32a, and 33a are arranged so as to form a triangle when viewed from the vehicle width direction. The upper surface 3a of the axle 3 is lowered frontward. The power converter 10 is fixed above the front upper surface 3a. Six power cables 19 extend from the side surface of the power converter 10, and these power cables 19 are connected to the transaxle 3. The six power cables 19 transmit two sets of three-phase AC power supplied to the two motors 31 and 32, respectively. In order to shorten the power cable 19 that transmits a large amount of power, the power converter 10 is arranged near the motors 31, 32, that is, above the transaxle 3 that houses the motors.

  The power converter 10 is fixed by the front bracket 5 and the rear bracket 6 with a gap SP between the transaxle 3. This structure is adopted to protect the power converter 10 from vibrations of the transaxle 3 (vibrations of the motors 31 and 32) and vibrations of the engine 7 connected to the transaxle 3. An anti-vibration bush 51 is attached to the connection part of the front bracket 5 with the power converter 10, and an anti-vibration bush 52 is also attached to the connection part of the rear bracket 6 with the power converter 10.

  The case 11 of the power converter 10 includes a case body 12, an upper cover 13, and a lower cover 15. FIG. 3 shows an exploded view of the case of the power converter 10. The case body 12 has both an upper surface and a lower surface opened in consideration of convenience of work of attaching parts at the time of assembly and convenience of maintenance work. The upper opening is covered with the upper cover 13. The upper cover 13 is fixed to the upper part of the case body 12 with a plurality of bolts 14. An opening on the lower surface of the case body 12 is covered with a lower cover 15. The lower cover 15 is fixed to the lower portion of the case body 12 with a plurality of bolts 16. The lower cover 15 is fixed by bolts 16 around the opening on the lower surface of the case body 12. Regarding the distance W between the bolt with the reference numeral 16a and the bolt with the reference numeral 16b, among all the bolts 16 that fix the lower cover 15, the interval between the adjacent bolts is the widest.

  A protrusion 121 is provided on the side surface of the case body 12, and the protector 20 is fixed to the protrusion 121. Among the plurality of bolts 16 that fix the lower cover 15, the bolts 16 a and 16 b having the widest bolt spacing are covered by the protector 20. The protector 20 will be described later.

  As shown in FIG. 3, the case body 12 of the power converter 10 also has an opening on the lower surface, and the opening is closed by the lower cover 15. On the other hand, as shown in FIG. 2, the power converter 10 is fixed above the transaxle 3 by a front bracket 5 and a rear bracket 6 with a gap SP provided below the lower cover 15. When the vehicle collides forward, the power converter 10 receives a collision load from the front. The front bracket 5 and the rear bracket 6 may be deformed by the collision load, and the lower portion of the case 11 of the power converter 10 may collide (strongly interfere) with the rear bracket 6 or the transaxle 3. The case 11 is deformed by the collision. As a result, among the bolts 16 fixing the lower cover 15, the boundary between the lower cover 15 and the case body 12 may be opened between the two bolts 16a and 16b having the widest bolt intervals. Therefore, in the vehicle-mounted structure of this embodiment, the protector 20 is attached to the case 11. Next, the protector 20 will be described.

  FIG. 4 shows an enlarged view of a range indicated by reference numeral IV in FIG. The protector 20 is fixed to the side surface of the case body 12 facing the vehicle width direction by a bolt 17. FIG. 5 shows a cross section taken along the line VV of FIG. In FIG. 5, illustration of electronic components housed in the case body 12 is omitted. A protrusion 121 for fixing the bolt 17 is provided on a side surface of the case body 12 facing the vehicle width direction, and the protector 20 is applied to the crown surface of the protrusion 121 and fixed by the bolt 17. A flange 201 extending along the upper surface of the protrusion 121 of the case body 12 is provided on the upper end of the protector 20. Further, the protector 20 extends to the lower cover 15 along the side surface of the case body 12, and is curved along the bottom surface of the lower cover 15. In other words, the protector 20 is curved so as to sneak below the lower cover 15 from the side of the case body 12. The curved portion of the protector 20 covers the two bolts 16a and 16b for fixing the lower cover 15 to the case body 12 and the boundary L between the lower cover 15 and the case body 12 between the two bolts 16a and 16b. ..

  A rib 151 extending downward is provided in a portion of the lower cover 15 covered by the protector 20. The lower end of the rib 151 is in contact with the upper surface 202a of the horizontal portion 202 extending below the lower cover 15 of the protector 20. In other words, a part (the rib 151) of the lower cover 15 is in contact with the upper surface 202a of the part (horizontal part 202) of the protector 20 extending below the lower cover 15.

  The effect of the protector 20 will be described. The protector 20 is made of strong iron. The lower cover 15 is also made of iron. The case body 12 is made of aluminum. In the protector 20, when the vehicle collides forward and the power converter 10 collides with the rear bracket 6 or the transaxle 3 due to the impact, the boundary between the lower cover 15 and the case body 12 is opened between the bolts 16a and 16b. Prevent that. The upper flange 201 of the protector 20 is hooked on the projection 121 of the case body 12, and the lower horizontal portion 202 of the protector 20 is hooked on the rib 151 of the lower cover 15. The protector 20 prevents another part from colliding with the boundary L between the bolts 16a and 16b in the event of a vehicle collision, and prevents the upper and lower catches from opening the boundary between the lower cover 15 and the case body 12. Further, even if the boundary between the lower cover 15 and the case body 12 is slightly opened, the protector 20 covers the opened portion, so that foreign matter such as debris generated by the impact of collision collides with the case body 12. Intrusion is prevented. The flange 201 on the upper portion of the protector 20 also has the effect of increasing the strength of the protector 20. The flange 201 is provided not only on the cross section of FIG. 5, but also on the front upper inclined edge 20a of the protector 20 (see FIG. 4). The flange provided on the inclined edge 20a is also caught on the unevenness (not shown) on the side surface of the case body 12.

  The vehicle-mounted structure described in the embodiments can be summarized as follows. The power converter 10 is mounted in the front compartment of the vehicle. The power converter 10 is fixed below the lower cover 15, that is, above the transaxle 3 with two brackets (a front bracket 5 and a rear bracket 6) with a gap SP. The power converter 10 is fixed above the transaxle 3 in a front-down posture. The transaxle 3 accommodates traveling motors 31 and 32 to which the power converter 10 supplies electric power. In that sense, the transaxle 3 can be called a motor housing. Therefore, in other words, the power converter 10 is fixed to the motor housing by the two brackets with a gap from the upper surface 3a of the motor housing.

  The power converter 10 includes a case body 12 and a lower cover 15. The case body 12 has an open bottom surface, and a lower cover 15 covers the opening. The lower cover 15 is fixed to the case body 12 by a plurality of bolts 16. The protector 20 is fixed to the case body 12. The protector 20 is fixed to the projection 121 on the side surface of the case body 12 with a bolt 17. The protector 20 includes two bolts 16a and 16b having the largest bolt spacing among the plurality of bolts 16 that fix the lower cover 15, and a boundary between the case body 12 and the lower cover 15 between the two bolts 16a and 16b. Is curved along the lower cover 15 from the side surface of the case body 12 so as to cover the. A part of the lower cover 15 is in contact with the upper surface of the portion of the protector 20 extending below the lower cover 15. More specifically, it is as follows. A rib 151 extending downward is provided in a portion of the lower cover 15 covered by the protector 20. The lower end of the rib 151 is in contact with the upper surface 202a of the horizontal portion 202 extending below the lower cover 15 of the protector 20. Further, a flange 201 extending along the upper surface of the protrusion 121 of the case body 12 is provided on the upper portion of the protector 20, and the flange 201 is hooked on the protrusion 121. The protrusion 121 of the case body 12 and a part of the lower cover 15 are sandwiched between the upper flange 201 and the lower horizontal portion 202 of the protector 20.

  With the above-described vehicle-mounted structure, it is possible to prevent the boundary between the case body 12 and the lower cover 15 of the power converter 10 from opening due to the impact of a vehicle collision.

  Specific examples of the present invention have been described above in detail, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in the present specification or the drawings exert technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technique illustrated in the present specification or the drawings can achieve a plurality of purposes at the same time, and achieving one of the purposes has technical utility.

3: Transaxle 5: Front bracket 6: Rear bracket 7: Engine 10: Power converter 11: Case 12: Case body 13: Upper covers 14, 16, 16a, 16b, 17: Bolt 15: Lower cover 19: Power cable 20 : Protectors 31, 32: motor 90: hybrid vehicle 91: front compartment 121: projection 151: rib 201: flange 202: horizontal part

Claims (1)

It is an in-vehicle structure of electronic equipment,
The electronic device includes a case main body whose lower surface is opened, and a lower cover which covers the opening and is fixed by a plurality of bolts at a lower portion of the case main body.
The electronic device is fixed to the vehicle by a bracket with a gap below the lower cover,
Along the lower cover from the side surface of the case main body so that the case main body covers the boundary between the two adjacent bolts of the plurality of bolts and the two bolts. The curved protector is fixed,
A vehicle-mounted structure for an electronic device, wherein a part of the lower cover is in contact with an upper surface of a portion of the protector extending below the lower cover.

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