JP2017094942A - vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle which enables reduction of strength needed for a vibration control member of an electric component.SOLUTION: A vehicle includes: an electric component housed in a casing 108a mounted on an underfloor space of a passenger compartment of a vehicle body; a support member 128 having a protection surface 124c positioned at a road surface side of the casing 108a, a fixing part fixed to the vehicle body, and a support part 120f supporting the casing 108a through a vibration control member 130 for inhibiting vibration transmission. Stress resulting from an impact from the protection surface 124c is not transmitted from the support part 120f to the casing 108a.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle on which an electrical component is mounted.

  In a vehicle such as a hybrid vehicle that travels with the driving force of both an engine and a motor, a casing that houses electrical components such as an inverter is fixed to the vehicle body. Since electrical components are likely to vibrate when driven, a vibration isolation member (anti-vibration bush) is provided to suppress transmission of vibration from the electrical component to the vehicle body (for example, Patent Document 1).

JP 2008-248936 A

  By the way, when arrange | positioning the casing which accommodates an electrical component under the floor of a compartment, it is necessary to provide a protection member in the road surface side of a casing. Here, when an impact is applied to the protective member due to the protective member coming into contact with the road surface, an excessive load is applied to the vibration isolating member. Therefore, in the configuration described in Patent Document 1, the strength required for the vibration isolating member is increased.

  Then, this invention aims at providing the vehicle which can reduce the intensity | strength requested | required of the vibration isolator of an electrical component.

  In order to solve the above-mentioned problems, the vehicle of the present invention is fixed to the vehicle body among the vehicle body, electrical components mounted under the floor of the passenger compartment and housed in the casing, a protective surface positioned on the road surface side of the casing, and the vehicle body. A support member having a fixed portion and a support portion that supports the casing via a vibration-proof member that suppresses vibration transmission is provided.

  The support member may include a grounding protector on which a protective surface is formed, and a plurality of brackets that are fixed to the grounding protector while the fixing portion is formed.

  A through hole formed in the support portion; and a fastening member that is inserted through the through hole and fastens the support portion and the casing. The vibration isolating member is an annular member made of an elastic material, and Further, the outer side in the radial direction of the fastening member may be surrounded and interposed between the support portion and the fastening member.

  The support portion may face the casing in a direction perpendicular to the height direction of the vehicle body.

  The support part may be provided on the protective surface.

  ADVANTAGE OF THE INVENTION According to this invention, the intensity | strength requested | required of the vibration isolator of an electrical component can be reduced.

It is a side view of a vehicle. It is a perspective view of PCU. FIG. 3 is a view taken in the direction of arrow III in FIG. 2. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is explanatory drawing for demonstrating a modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a side view of the vehicle 100. Here, a hybrid vehicle using the engine 102 and the motor 104 as drive sources will be described as an example of the vehicle 100. As shown in FIG. 1, an engine 102, a motor 104, and a battery 106 are mounted on the vehicle 100. The engine 102 is disposed on the front side of the vehicle body 100a in the front-rear direction (left-right direction in FIG. 1), and the motor 104 is disposed behind the engine 102. The battery 106 is disposed on the rear side of the vehicle body 100a.

  Here, the vehicle 100 has a motor travel mode in which the motor 104 travels preferentially over the engine 102 when the remaining amount of the battery 106 is sufficient, and the motor 104 and the engine 102 when the remaining amount of the battery 106 is small. A traveling mode such as an engine combined mode for traveling together is prepared.

For example, in the vehicle 100, when the traveling mode is selected according to the remaining amount of the battery 106 and the engine combined mode is selected, the driving state of the engine 102 and the motor 104 is switched according to the traveling state, and the energy It is possible to increase efficiency and reduce exhaust gas such as CO ₂ (carbon dioxide).

  The vehicle 100 is equipped with a PCU (power control unit) 108. The PCU 108 is disposed under the floor of the passenger compartment 100b where a passenger enters, and is positioned between the motor 104 and the battery 106 in the front-rear direction (the left-right direction in FIG. 1) of the vehicle body 100a. A booster 110 and an inverter (electrical component) 112 are accommodated in the casing 108 a of the PCU 108. The booster (electrical component) 110 boosts DC power from the battery 106, and the inverter 112 converts the DC power into AC power and supplies it to the motor 104.

  FIG. 2 is a perspective view of the PCU 108. As shown in FIG. 2, the casing 108a of the PCU 108 is sandwiched between two brackets 120, 122 from the front-rear direction of the vehicle body 100a (indicated by a double arrow a in FIG. 2). That is, the brackets 120 and 122 are opposed to the casing 108a and the vehicle body 100a in the front-rear direction, and the brackets 120 and 122 are generally main body 120a and 122a of the brackets 120 and 122 up to a portion facing the casing 108a. .

  The bracket 120 has a protruding portion (fixed portion) 120b that protrudes from the main body 120a in the vehicle width direction of the vehicle body 100a (indicated by a double arrow b in FIG. 2). A bolt hole 120c is formed in the protruding portion 120b, and the bracket 120 is fixed to the vehicle body 100a by a bolt (not shown) inserted through the bolt hole 120c.

  Further, the bracket 120 may be fixed not only directly to the vehicle body 100a but also via another member fixed to the vehicle body 100a. Hereinafter, the expression “fixed to the vehicle body 100a” includes the case of being fixed to the vehicle body 100a via another member.

  Similarly, the bracket 122 has a protruding portion (fixed portion) 122b that protrudes from the main body 122a in the vehicle width direction of the vehicle body 100a (indicated by a double arrow b in FIG. 2). A bolt hole 122c is formed in the protruding portion 122b, and is fixed to the vehicle body 100a by a bolt (not shown) inserted through the bolt hole 122c.

  In addition, the brackets 120 and 122 are provided with protruding portions (fixed portions) 120d and 122d that protrude from the main bodies 120a and 122a to the opposite side to the protruding portions 120b and 122b, respectively. Bolt holes 120e and 122e are formed in the projecting portions 120d and 122d, and are fixed to the vehicle body 100a by bolts (not shown).

  The support portions 120f are a part of the main body 120a of the bracket 120, and two support portions 120f are formed apart from each other in the vehicle width direction of the vehicle body 100a. The support portion 120f faces the casing 108a in the front-rear direction of the vehicle body 100a and supports the casing 108a. Similarly, the support portions 122f are a part of the main body 122a of the bracket 122, and two support portions 122f are formed apart from each other in the vehicle width direction of the vehicle body 100a. The support portion 122f faces the casing 108a in the front-rear direction of the vehicle body 100a and supports the casing 108a. The support structure by the support parts 120f and 122f will be described in detail later.

  The ground protector 124 is disposed on the road surface side of the casing 108a. That is, the ground protector 124 is located on the opposite side of the casing 108a from the vehicle body 100a, and is disposed opposite to the bottom surface 108b of the casing 108a on the vertical lower side in the height direction of the vehicle body 100a.

  The legs 120g and 122g projecting toward the ground protector 124 are provided on the main bodies 120a and 122a and the projecting portions 120d and 122d of the brackets 120 and 122 (three in this case). The ground protector 124 is fixed to the leg portions 120g and 122g of the brackets 120 and 122. The fixing structure of the ground protector 124 and the legs 120g and 122g will be described in detail later.

  3 is a view taken in the direction of arrow III in FIG. As shown in FIGS. 2 and 3, the ground protector 124 has a generally flat plate-shaped main body 124a. A protective surface 124c is formed on the main body 124a on the side (road surface side) opposite to the surface 124b facing the casing 108a. When the road surface and the casing 108a are close to each other, the protective surface 124c contacts the road surface side instead of the casing 108a.

  For example, the casing 108a is fixed to both the ground protector 124 (or the brackets 120 and 122 fixed to the ground protector 124) and the vehicle body 100a, and the casing 108a is sandwiched between the ground protector 124 and the vehicle body 100a. Along with the impact from the protective surface 124c due to contact with the road surface, a large stress is generated in the casing 108a.

  In the present embodiment, as described above, the casing 108a is supported by the support portions 120f and 122f of the brackets 120 and 122 fixed to the ground protector 124, but is not fixed to the vehicle body 100a. In addition, a gap is formed between the casing 108a and the vehicle body 100a so that the casing 108a can move to the vehicle body 100a side together with the ground protector 124 and the brackets 120 and 122 even if there is an impact from the protective surface 124c.

  Therefore, although the stress propagates from the ground protector 124 to the vehicle body 100a through the brackets 120 and 122 due to the impact from the protective surface 124c, the stress hardly propagates to the casing 108a.

  4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, a bolt hole 120h is formed in the leg 120g. The bolt hole 120h extends in the vertical direction (the height direction of the vehicle body 100a) in FIG. 4 and has a thread groove formed on the inner peripheral surface.

  In addition, the main body 124a of the ground protector 124 is formed with a counter hole 124d at a portion facing the bolt hole 120h. The counter hole 124d penetrates the main body 124a in the vertical direction (the direction facing the bolt hole 120h) in FIG.

  The bolt 126 is inserted into the facing hole 124d from the protective surface 124c side, and the front end of the bolt 126 is inserted into the bolt hole 120h and screwed together, whereby the leg 120g (bracket 120) and the ground protector 124 are fastened. . Although the fixing structure between the ground protector 124 and the bracket 120 has been described here, the ground protector 124 and the bracket 122 are also fixed with the same fixing structure.

  As described above, the brackets 120 and 122 and the ground protector 124 fixed to the brackets 120 and 122 constitute a support member 128 that supports the casing 108a.

  In addition, a through hole 120i is formed in the support portion 120f of the bracket 120 so as to penetrate the support portion 120f in the direction facing the casing 108a (the left-right direction in FIG. 4). That is, the support part 120f is a part where the through hole 120i is formed in the main body 120a.

  An anti-vibration member 130 is accommodated in the through hole 120i. The vibration isolation member 130 is an annular member made of an elastic material (for example, rubber), and the main body 130a of the vibration isolation member 130 is approximately equal to the axial length of the through hole 120i. Further, a vibration isolating hole 130 b is formed in the main body 130 a of the vibration isolating member 130. The anti-vibration member 130 is inserted into the through hole 120i in a direction in which the anti-vibration hole 130b is substantially parallel to the through hole 120i.

  A spacer 132 is inserted through the vibration-proof hole 130b. The spacer 132 has an annular main body 132a. A spacer hole 132b is formed in the main body 132a. The spacer 132 is arranged in a direction in which the spacer hole 132b is substantially parallel to the vibration-proof hole 130b. . That is, the spacer hole 132b and the through hole 120i are also substantially parallel.

  A casing hole 108c is formed in a portion of the casing 108a that faces the spacer hole 132b. The casing hole 108c has a thread groove formed on the inner peripheral surface.

  The fastening member 134 is inserted into the spacer hole 132b (through hole 120i) from the side opposite to the casing 108a, and the leading end portion of the fastening member 134 is inserted into the casing hole 108c and screwed, whereby the spacer 132 and the casing 108a are engaged. It is concluded.

  At this time, the head portion 134a of the fastening member 134 and the casing 108a are separated from each other by the length of the spacer 132 in the axial direction. The main body 132a of the spacer 132 is formed to be longer in the left-right direction (axial direction) in FIG. 4 than the thickness of the support portion 120f and the main body 130a of the vibration isolation member 130. The support portion 120f and the vibration isolation member 130 are casings. It will be maintained in the state separated from 108a.

  Thus, the vibration isolator 130 surrounds the outer side in the radial direction of the fastening member 134 in the through hole 120i of the support portion 120f, and is interposed between the support portion 120f and the fastening member 134. Further, since the support portion 120f is separated from the casing 108a, the vibration isolating member 130 is interposed in the vibration transmission path between the support portion 120f and the casing 108a. In other words, the support part 120 f supports the casing 108 a via the vibration isolation member 130.

  As described above, since the vibration isolation member 130 is made of an elastic material, even if the inverter 112 housed in the casing 108a vibrates during driving, vibration transmission from the inverter 112 to the bracket 120 can be suppressed. .

  For convenience of explanation, only the support structure of the casing 108a by the support portion 120f of the bracket 120 has been described. Needless to say, the support portion 122f of the bracket 122 also supports the casing 108a with the same support structure. Yes.

  By the way, as another configuration for suppressing vibration transmission from the inverter 112 to the vehicle body 100a, it is conceivable to arrange the vibration isolation member 130 between the projecting portions 120b, 120d, 122b, and 122d and the vehicle body 100a. However, in this case, if there is an impact from the protective surface 124c, the vibration isolation member 130 is positioned in the stress transmission path to the vehicle body 100a, and the stress associated with the impact directly acts on the vibration isolation member 130.

  In the present embodiment, as described above, the stress accompanying the impact from the protective surface 124c is not propagated from the support portions 120f and 122f to the casing 108a.

  Therefore, by arranging the vibration isolating member 130 on the support portions 120f and 122f, the vibration isolating member 130 is not exposed to the stress accompanying the impact from the protective surface 124c, and the strength required for the vibration isolating member 130 is reduced. can do. As a result, the vibration isolating member 130 can be downsized to reduce the occupied volume, and the component cost can be reduced.

(Modification)
FIG. 5 is an explanatory diagram for explaining a modified example, and shows a cross-sectional view of a portion corresponding to FIG. 4 in the modified example. In the embodiment described above, the case where the support portions 120f and 122f are provided on the brackets 120 and 122 has been described. However, in the modified example, as illustrated in FIG. 5, the support portion 224e is formed on the ground protector 224.

  Specifically, of the main body 224a of the ground protector 224, a projecting portion 224f that projects toward the casing 108a is provided on the surface 224b facing the casing 108a. A through hole 224g is formed in the protruding portion 224f.

  The through hole 224g penetrates the protruding portion 224f in the vertical direction (opposite direction of the casing 108a and the facing surface 224b) in FIG. 5 to the casing 108a side, and extends to the protective surface 224c of the ground protector 224. And the support part 224e is a site | part in which the through-hole 224g was formed among the main bodies 224a (protective surface 224c).

  As in the above-described embodiment, the vibration-proof member 130, the spacer 132, and the fastening member 134 are inserted into the through hole 224g, and the front end of the fastening member 134 is a casing hole 108d provided on the bottom surface 108b of the casing 108a. Is inserted into and screwed. Since the support structure of the casing 108a by the support portion 224e is substantially the same as the above-described embodiment, it will not be described in detail in order to avoid duplication of explanation.

  As described above, in the modification, the support portion 224e is formed on the ground protector 224, and the casing 108a is supported by the ground protector 224 on the bottom surface 108b side by the support portion 224e. The vibration isolation member 130 is provided on the support portion 224e.

  Therefore, as in the above-described embodiment, the vibration isolator 130 provided on the support portion 224e is not exposed to the stress associated with the impact from the protective surface 224c, and the strength required for the vibration isolator 130 is reduced. Can do.

  In the modified example, since the casing 108a is supported by the ground protector 224, when an impact is applied to the protective surface 224c of the ground protector 224, the casing 108a is integrated with the ground protector 224 without passing through the brackets 120 and 122. Will be displaced. As a result, the strength required for the brackets 120 and 122 can be reduced, and the component cost can be reduced.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and various modifications within the scope described in the claims. Needless to say, the modified examples also belong to the technical scope of the present invention.

  For example, in the above-described embodiments and modifications, the case where the brackets 120 and 122 and the ground protectors 124 and 224 are formed separately has been described. However, the brackets 120 and 122 and the ground protectors 124 and 224 may be integrally formed, and the support member 128 may be configured by the integrally formed member. However, by forming the brackets 120 and 122 and the ground protectors 124 and 224 separately, the ground protectors 124 and 224 are formed of a material having a strength higher than that of the brackets 120 and 122. As compared with the case, it is possible to suppress an increase in component costs.

  In the embodiment and the modification described above, the case where the support portions 120f, 122f, and 224e and the casing 108a are fastened by the fastening member 134 and the vibration isolation member 130 surrounds the radially outer side of the fastening member 134 has been described. However, as long as the support portions 120f, 122f, and 224e can support the casing 108a, and the vibration isolation member 130 can suppress vibration transmission from the inverter 112 to the support member 128, the support structure may have any configuration. However, when the support portions 120f, 122f, and 224e and the casing 108a are fastened by the fastening member 134 and the vibration isolation member 130 surrounds the radially outer side of the fastening member 134, the structure is simple and the fastening work is easy. Can be carried out.

  In the above-described embodiment, the case where the support portion 122f faces the casing 108a in a direction perpendicular to the front-rear direction of the vehicle body 100a has been described. However, the support portion 122f may be opposed to a direction perpendicular to the height direction of the vehicle body 100a (indicated by a double arrow c in FIG. 2), and the direction facing the casing 108a is limited to the front-rear direction of the vehicle body 100a. Not. Further, as in the above-described modification, the support portion 224e may be provided in the ground protector 224 and face the casing 108a in the height direction of the vehicle body 100a.

  In the above-described embodiment, the booster 110 and the inverter 112 are described as examples of the electrical components that suppress the vibration transmission to the vehicle body 100a by the vibration isolation member 130. However, the electrical components other than the booster 110 and the inverter 112 are described. You may apply the said structure with respect to components.

  INDUSTRIAL APPLICABILITY The present invention can be used for a vehicle in which electrical parts are mounted under the floor of a passenger compartment.

100 Vehicle 100a Car body 100b Car compartment 108a Casing 110 Booster (electrical parts)
112 Inverter (electric parts)
120, 122 Brackets 120f, 122f Support portions 124, 224 Ground protectors 124c, 224c Protective surface 128 Support member 130 Anti-vibration member 134 Fastening member

Claims (5)

Of the vehicle body, electrical components mounted under the floor of the passenger compartment and housed in the casing;
A support member having a protective surface located on the road surface side of the casing, a fixed portion fixed to the vehicle body, and a support portion that supports the casing via a vibration isolation member that suppresses vibration transmission;
A vehicle comprising: The support member is
A ground protector on which the protective surface is formed;
A plurality of brackets fixed to the ground protector while the fixing portion is formed,
The vehicle according to claim 1, comprising: A through hole formed in the support part;
A fastening member that is inserted through the through hole and fastens the support portion and the casing;
Further comprising
The vibration isolating member is an annular member made of an elastic material, and surrounds a radially outer side of the fastening member in the through hole and is interposed between the support portion and the fastening member. The vehicle according to claim 2.   The vehicle according to any one of claims 1 to 3, wherein the support portion faces the casing in a direction perpendicular to a height direction of the vehicle body.   The vehicle according to any one of claims 1 to 3, wherein the support portion is provided on the protective surface.

Images