JP6090185B2 - Mounting structure for vehicle auxiliary equipment - Google Patents

Description

  The present invention relates to a mounting structure for a vehicular auxiliary machine, and more particularly to an improvement for improving vehicle safety at the time of a forward collision.

  2. Description of the Related Art In recent years, vehicles having a mode in which an auxiliary machine connected to a high voltage source is disposed in, for example, an engine room at a front portion of a vehicle in order to make a vehicle compartment space widespread. In such a vehicle, a technique for ensuring safety against a high voltage at the time of a vehicle collision has been proposed. For example, the routing structure described in Patent Document 1 is an example. In this technology, vehicle safety during a collision is improved by taking measures to prevent damage to the high-voltage harness during a frontal collision.

JP 2006-175926 A

  However, in a vehicle in which an auxiliary machine connected to the high voltage source is arranged in the front part of the vehicle, not only a high voltage harness but also auxiliary machines connected to the high voltage source, such as an air conditioner compressor, due to a forward collision of the vehicle. It is conceivable that the impact is transmitted to the member supporting the water pump and the like. In the prior art, at the time of a frontal collision of a vehicle, the durability of the members supporting the auxiliary devices cannot be sufficiently suppressed, and the auxiliary devices may fall off. Such a problem has been newly found in the process in which the present inventors have continued intensive research with the intention of improving vehicle safety during a collision.

  The present invention has been made against the background of the above circumstances, and an object of the present invention is to provide a mounting structure for a vehicular auxiliary machine that improves vehicle safety at the time of a forward collision.

  In order to achieve such an object, the subject matter of the first invention includes an auxiliary machine connected to a high voltage source, and a bracket to which the auxiliary machine is fixed, the bracket and the auxiliary machine. Is a mounting structure that is disposed in the front part of the vehicle, and the auxiliary machine is provided on the front side of the vehicle with respect to the bracket, and the first part of the bracket having relatively high rigidity is relatively rigid. It is fixed to the bracket at the lower second part, and a gap is provided between the auxiliary machine and the bracket at parts other than the first part and the second part. It is provided at a position lower than the two parts, and the gap between the auxiliary machine and the bracket is narrowest in the vicinity of the second part.

  According to the first invention, the auxiliary machine is provided on the vehicle front side with respect to the bracket, and the first part having a relatively high rigidity and the second part having a relatively low rigidity in the bracket. A gap is provided between the auxiliary machine and the bracket at a portion other than the first part and the second part, which is fixed to the bracket, and the first part is lower than the second part. Since the gap between the auxiliary machine and the bracket is the narrowest in the vicinity of the second part, the second part having relatively low rigidity is deformed when the vehicle collides forward, The auxiliary machine is rotated with respect to the bracket with a first portion having a relatively high rigidity as a fulcrum, and a part of the bracket is brought into contact with the auxiliary machine at a portion where the gap is the narrowest. Thereby, the drop-off of the auxiliary machine due to an impact at the time of a frontal collision of the vehicle can be suitably suppressed. That is, it is possible to provide a mounting structure for a vehicular auxiliary machine that improves the vehicle safety during a frontal collision.

  The gist of the second invention subordinate to the first invention includes a case, and the bracket includes a flange portion protruding in a hook shape, and fixing at a plurality of locations provided on the flange portion. The fixed portion is fixed to the case, and the fixed portion is formed with a thickness smaller than that of the flange portion other than the fixed portion. In this way, by configuring the fixing part to be easily deformed, it is possible to absorb an impact at the time of a frontal collision of the vehicle by the deformation of the fixing part, and to more suitably suppress the detachment of the auxiliary machine. be able to.

  The gist of the third invention subordinate to the second invention is that, among the plurality of fixing portions, at least one fixing portion provided on the vehicle rear side is thicker than other fixing portions. The dimension is formed thick. In this way, when the fixing portion provided on the vehicle front side is broken, the bracket is rotated with respect to the case using the fixing portion provided on the vehicle rear side as a fulcrum. Therefore, it is possible to suitably suppress the input of impact, and it is possible to more suitably suppress the detachment of the auxiliary machine.

It is a perspective view which illustrates attachment structure of a vehicular auxiliary machine to which the present invention is applied suitably. It is a perspective view which illustrates attachment structure of a vehicular auxiliary machine to which the present invention is applied suitably. It is a perspective view which illustrates attachment structure of a vehicular auxiliary machine to which the present invention is applied suitably. In the attachment structure shown in FIGS. 1-3, it is a schematic side view which shows a mode that the air conditioner compressor and the bracket were seen from the vehicle side. In the mounting structure shown in FIGS. 1 to 3, a fixing portion relatively provided on the vehicle rear side and a fixing portion relatively provided on the vehicle front side are shown.

  The present invention is preferably applied to a fuel cell vehicle (FC vehicle) that does not include an engine as an internal combustion engine such as a gasoline engine or a diesel engine. For example, in the configuration in which the auxiliary machine, the bracket, the case, and the like are arranged in a space corresponding to an engine room in which the internal combustion engine is housed in a conventional vehicle including the internal combustion engine, It is suitably applied to the structure.

  In the present invention, preferably, the auxiliary machine is an on-vehicle electric device such as an air conditioner compressor, an air compressor, or a water pump.

  In the present invention, preferably, the attachment position of the accessory relative to the bracket is such that the impact energy input at the time of a forward collision of the vehicle to which the attachment structure is applied (at the time of a forward collision) is the The position is input above the center of gravity with respect to the vehicle vertical direction. The center of gravity of the accessory is, for example, the center of gravity of the contour of the accessory when the accessory is viewed from a direction perpendicular to the vehicle vertical direction and the vehicle front-rear direction.

  In the present invention, preferably, an abutment seat is provided so as to protrude from the bracket to the accessory side. The portion where the gap between the auxiliary machine and the bracket is the narrowest corresponds to the gap between the seat and the side surface of the auxiliary machine on the bracket side.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 3 are perspective views illustrating an attachment structure 10 for a vehicular auxiliary machine to which the present invention is preferably applied, and a part thereof is omitted. 1 to 3, the vehicle traveling direction in front of the vehicle, that is, forward traveling, is indicated by an arrow x, and the upper direction of the vehicle, that is, the vertically upward direction is indicated by an arrow y. A vehicle front (front-rear direction) indicated by an arrow x and a vehicle upper direction (up-down direction) indicated by an arrow y are perpendicular to each other. The mounting structure 10 of this embodiment includes an air conditioner compressor 12 as a vehicular auxiliary machine, a bracket 14, a case 16, and an air compressor 18. As will be described in detail below, the air conditioner compressor 12 and the air compressor 18 are fixed to the bracket 14. The bracket 14 is fixed to the case 16. In this embodiment, a mounting structure 10 in which the present invention is applied to a mounting structure of the air conditioner compressor 12 to the bracket 14 and a mounting structure of the bracket 14 to the case 16 will be described.

  The mounting structure 10 of the present embodiment is suitably applied to a fuel cell vehicle (FC vehicle) that does not include an engine as an internal combustion engine such as a gasoline engine or a diesel engine. The air conditioner compressor 12, the bracket 14, the case 16, and the air compressor 18 according to the mounting structure 10 are arranged (stored) in a space corresponding to, for example, a so-called engine room in the front portion of the vehicle. The air conditioner compressor 12 is a compressor provided in a car air conditioner (not shown) mounted on a vehicle, and is electrically connected to a high voltage power source (not shown). In this embodiment, the high voltage source corresponds to a power source such as a driving battery having a voltage of 60 V or more. The air compressor 18 is a compressor that pumps air to a predetermined device, and, like the air conditioner compressor 12, is electrically connected to a high-voltage power source (not shown). In the present embodiment, an example in which the present invention is applied to the mounting structure of the air conditioner compressor 12 as an auxiliary machine to the bracket 14 will be described. However, the mounting structure of the air compressor 18 as an auxiliary machine to the bracket 14; Alternatively, the present invention may be applied to a mounting structure such as a water pump (not shown).

  The bracket 14 is a member formed in a substantially cylindrical shape (annular shape) from a material such as an aluminum alloy, and is fixed to the case 16. An auxiliary machine such as the air conditioner compressor 12 is attached to the bracket 14. In other words, the bracket 14 corresponds to an intermediate member interposed between the case 16 and an auxiliary machine such as the air conditioner compressor 12. The case 16 is configured to house a device such as a transaxle mounted on a vehicle, and corresponds to, for example, a transaxle case. The case 16 is fixed, for example, in a so-called engine room in the front part of the vehicle.

  As shown in FIGS. 1 to 3, the air conditioner compressor 12 is attached to the front side of the vehicle with respect to the bracket 14. Specifically, a lower mounting portion (lower boss) 20 provided relatively below in the vehicle vertical direction is fixed to the bracket 14 by a fastener 22 such as a bolt and a nut. An upper mounting portion (upper boss) 24 provided relatively upward in the vehicle vertical direction is fixed to the bracket 14 by a fastener 26 such as a through bolt. The lower mounting portion 20 is provided at a position lower than the upper mounting portion 24 in the vehicle vertical direction. Preferably, it is fastened by the fastener 26 at one point in the upper mounting portion 24 and fastened by the fastener 22 at two points in the lower mounting portion 20. That is, the air conditioner compressor 12 is fixed to the bracket 14 at three points in the lower mounting portion 20 and the upper mounting portion 24.

  The mounting position of the air conditioner compressor 12 with respect to the bracket 14 is preferably such that the impact energy input at the time of a frontal collision of the vehicle to which the mounting structure 10 is applied (during a forward collision) is the air compressor of the air conditioner compressor 12. The position is input to the upper side in the vehicle vertical direction from the center of gravity G (see, for example, FIG. 4). That is, the mounting position of the air conditioner compressor 12 is designed so that the load input at the time of a frontal collision of the vehicle is input above the center of gravity G of the air conditioner compressor 12.

  In the present embodiment, the portion of the bracket 14 corresponding to the upper mounting portion 24 is lower in rigidity than the portion corresponding to the lower mounting portion 20. In other words, the upper mounting portion 24 is configured to be weaker than the lower mounting portion 20 so as to be easily deformed or broken by an impact. That is, in this embodiment, the lower mounting portion 20 is a first portion having a relatively high rigidity in the bracket 14, and the upper mounting portion 24 is a second portion having a relatively low rigidity in the bracket 14. Equivalent to.

  The case 16 includes a flange portion 28 provided so as to project in a bowl shape toward the outer peripheral side. The flange portion 28 is preferably provided at an end of the case 16 on the bracket 14 side. The bracket 14 includes a flange portion 30 provided so as to project in a bowl shape toward the outer peripheral side. The flange portion 30 is preferably provided at an end portion of the bracket 14 on the case 16 side. The bracket 14 and the case 16 are fixed to each other at the flange portions 28 and 30. Preferably, the bracket 14 is fixed to the case 16 at a plurality of fixing portions 32 provided on the flange portion 30. Specifically, in each fixing portion 32, the flange portion 30 provided on the bracket 14 and the flange portion 28 provided on the case 16 are fastened to each other by a fastener 34 such as a bolt, The bracket 14 is fixed to the case 16.

  FIG. 4 is a schematic side view showing the air conditioner compressor 12 and the bracket 14 viewed from the side of the vehicle in order to explain a gap provided between the air conditioner compressor 12 and the bracket 14. That is, the air conditioner compressor 12 and the bracket 14 are viewed from a direction perpendicular to the direction indicated by the arrow x and the direction indicated by the arrow y. In FIG. 4, outlines of the air conditioner compressor 12 and the bracket 14 are schematically shown, and a part of the bracket 14 is omitted. The bracket 14 shown in FIG. 4 corresponds to a portion other than the portion corresponding to the lower mounting portion 20 and the upper mounting portion 24. As shown in FIG. 4, a gap 36 is provided between the air conditioner compressor 12 and the bracket 14 in portions other than the lower mounting portion 20 and the upper mounting portion 24. In other words, the air conditioner compressor 12 and the bracket 14 are fixed to each other at the lower mounting portion 20 and the upper mounting portion 24, but are separated from each other.

  As shown in FIG. 4, the gap 36 between the air conditioner compressor 12 and the bracket 14 is the narrowest in the gap 36 n in the vicinity of the upper mounting portion 24. In other words, a gap 36n corresponding to the narrowest portion of the gap 36 between the air conditioner compressor 12 and the bracket 14 is closer to the upper mounting portion 24 than the lower mounting portion 20 in the vehicle vertical direction. It is said that. The gap 36n corresponds to a gap between the abutment seat 38 that protrudes from the bracket 14 toward the air conditioner compressor 12 and a side surface of the air conditioner compressor 12 on the bracket 14 side, and has an interval of about 4 mm, for example. Is done.

  In FIG. 1, in order to explain the configuration of the fixing portion 32 in detail, a portion surrounded by a broken-line rectangle is shown enlarged. This enlarged portion shows a state where the fastener 34 is not attached to the fixing portion 32. As shown in FIG. 1, the fixing portion 32 provided in the bracket 14 is formed such that at least a part of the thickness dimension is thinner than the portion other than the fixing portion 32 in the flange portion 30. Specifically, for example, the step 40 is formed by cutting the meat in the thickness direction of the flange 30 by a seating process such as milling. In other words, the fixing portion 32 is configured to be weaker than the flange portion 30 where the fixing portion 32 is not provided so that the fixing portion 32 is easily deformed or broken by a load (particularly, the torque in the circumferential direction of the bracket 14). ing.

  FIG. 5 shows a fixing portion 32r provided relatively on the vehicle rear side among a plurality of fixing portions 32 provided on the bracket 14, and a fixing portion 32f provided relatively on the vehicle front side (hereinafter referred to as “fixing portion 32f”). In the case where there is no particular distinction, it is simply referred to as a fixed portion 32). In the present embodiment, preferably, of the plurality of fixing portions 32, at least one fixing portion 32r relatively provided on the vehicle rear side is provided on the vehicle front side, which is another fixing portion, for example. The thickness dimension is formed thicker than the fixed portion 32f. For example, in the fixed portion 32r, the step 40 is formed shallower than the fixed portion 32f (that is, less meat is scraped in the thickness direction). Alternatively, the step 40 is not formed in the fixed portion 32r. In other words, the fixing portion 32f is configured to be weaker than the fixing portion 32r so that it is easily deformed or broken by a load (particularly, the torque in the circumferential direction of the bracket 14).

  Hereinafter, the action of the air-conditioner compressor 12 from being prevented from falling off at the time of a vehicle collision by the mounting structure 10 of the present embodiment will be described with reference to FIGS. 4 and 5. At the time of a forward collision of the vehicle to which the mounting structure 10 is applied (at the time of a forward collision), impact energy is input to the air conditioner compressor 12 attached to the bracket 14 on the front side of the vehicle. In FIG. 4, the impact energy input at the time of collision is indicated by a white arrow F. Here, as described above, the impact energy is input above the center of gravity G of the air conditioner compressor 12 in the vehicle vertical direction. Due to the load sharing according to the input position of the impact energy, only the upper mounting portion 24 of the lower mounting portion 20 and the upper mounting portion 24 related to the fixing of the air conditioner compressor 12 to the bracket 14 is damaged. That is, the impact energy is concentrated on one point of the upper mounting portion 24, and the impact energy is released by the damage of the upper mounting portion 24.

  When only the upper mounting portion 24 of the lower mounting portion 20 and the upper mounting portion 24 is destroyed, the air conditioner compressor 12 uses the lower mounting portion 24 as a fulcrum (rotation center) as shown by a broken line in FIG. As shown in FIG. Here, the bracket 14 is provided with a seat 38, and the portion corresponding to the seat 38 is the narrowest gap 36n, so that the air conditioner compressor 12 is brought into contact with the seat 38. At this stage, the rotation of the air conditioner compressor 12 is stopped. At this time, when the gap 36n is set to an interval of about 4 mm, since there is almost no impact property, the load is being distributed at three points of the two fastening portions in the lower mounting portion 20 and the abutment seat 38. A static load is input from the air conditioner compressor 12 to the bracket 14. Further, by the rotation corresponding to the distance of the gap 36n, the input vector of the impact energy is shifted downward with respect to the vehicle vertical direction as indicated by the white arrow F in FIG.

  When the input vector of the impact energy is shifted downward, a rotational force with respect to the case 16 is generated in the circumferential direction of the bracket 14. As a result, a bending stress is generated near the root of the fixed portion 32 provided on the bracket 14. Since the fixing portion 32 is formed with a thickness smaller than that of the flange portion 30 other than the fixing portion 32, stress concentration occurs at the step 40, for example. Thereby, for example, a crack 42 as shown by a thick line in FIG. 1 is generated, and the seating surface is destroyed starting from the step 40.

  In FIG. 5, in order to explain the configuration of the fixing portion 32f in detail, a portion surrounded by a broken-line rectangle is shown in an enlarged manner. In response to the input of the load indicated by the white arrow F in FIG. 5, a compressive load is provided on the vehicle front side in the fixed portion 32 r provided on the vehicle rear side among the plurality of fixed portions 32. A tensile load is applied to each of the fixed portions 32f. Thereby, the said fixing | fixed part 32f provided in the vehicle front side is destroyed previously. Furthermore, since the fixed part 32r is formed thicker than the fixed part 32f, the fixed part 32r is not easily broken by a load. In a state where the fixed portion 32f provided on the front side of the vehicle is destroyed and the fixed portion 32r provided on the rear side of the vehicle remains without being destroyed, the lower vector component of the load shown by the white arrow F in FIG. As shown by the white arrow in the enlarged portion, the bracket 14 is lower than the case 16 (clockwise toward the paper surface) with the fixed portion 32r as a fulcrum (rotation center). ). Due to this rotational displacement (rotational displacement), further collision input is avoided. Thereby, a load can be received as an annular bend, and a load can be received by the bracket 14 as a whole in a state where further local breakage is suitably prevented.

  Thus, according to the present embodiment, the air conditioner compressor 12 as an auxiliary machine is provided on the front side of the vehicle with respect to the bracket 14, and is a lower part as a first portion having relatively high rigidity in the bracket 14. The mounting portion 20 and an upper mounting portion 24 as a second portion having relatively low rigidity are fixed to the bracket 14, and at portions other than the lower mounting portion 20 and the upper mounting portion 24, A gap 36 is provided between the bracket 14, the lower mounting portion 20 is provided at a lower position than the upper mounting portion 24, and a gap 36 between the air conditioner compressor 12 and the bracket 14 is provided. Since it is narrowest in the vicinity of the upper mounting portion 24, the upper mounting portion has relatively low rigidity at the time of a vehicle front collision. 4 is deformed, and the air conditioner compressor 12 is rotated with respect to the bracket 14 with the lower mounting portion 20 having relatively high rigidity as a fulcrum, and a part of the bracket 14 has the narrowest gap 36. In FIG. Thereby, the drop-off of the air conditioner compressor 12 due to an impact at the time of a frontal collision of the vehicle can be suitably suppressed. That is, it is possible to provide the mounting structure 10 for the air conditioner compressor 12 that improves the vehicle safety at the time of a frontal collision.

  The bracket 14 includes a flange portion 30 provided so as to protrude like a bowl, and is fixed to the case 16 at a plurality of fixing portions 32 provided on the flange portion 30. 32 is formed with a thickness smaller than that of the flange portion 30 other than the fixed portion 32. Therefore, the fixed portion 32 is configured to be easily deformed, so that the vehicle can be easily deformed. The impact can be absorbed by the deformation of the fixing portion 32, and the drop-off of the air conditioner compressor 12 can be more suitably suppressed.

  Among the plurality of fixing portions 32, at least one fixing portion 32r provided on the vehicle rear side is formed with a thickness dimension larger than that of the other fixing portions 32f, and therefore, on the vehicle front side. When the provided fixing portion 32f is broken, the bracket 14 is rotated with respect to the case 16 with the fixing portion 32r provided on the rear side of the vehicle as a fulcrum, which is suitable for further impact input. It is possible to suppress the air conditioner compressor 12 from falling off more suitably.

  The preferred embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. Is.

  10: mounting structure, 12: air conditioner compressor (auxiliary machine), 14: bracket, 16: case, 20: lower mounting part (first part), 24: upper mounting part (second part), 30: flange part, 32 : Fixed part, 36: gap

Claims (3)

An auxiliary machine connected to a high voltage source, and a bracket to which the auxiliary machine is fixed, and the bracket and the auxiliary machine are arranged in a vehicle front portion,
The auxiliary machine is provided on the vehicle front side with respect to the bracket, and is fixed to the bracket at a first portion having relatively high rigidity and a second portion having relatively low rigidity in the bracket,
In a portion other than the first part and the second part, a gap is provided between the auxiliary machine and the bracket,
The first part is provided at a position lower than the second part,
The mounting structure is characterized in that a gap between the auxiliary machine and the bracket is narrowest in the vicinity of the second part. With a case,
The bracket includes a flange portion that protrudes in a bowl shape, and is fixed to the case at a plurality of fixing portions provided on the flange portion,
The mounting structure according to claim 1, wherein the fixing portion is formed with a thickness smaller than that of the flange portion other than the fixing portion. The mounting structure according to claim 2, wherein among the plurality of fixing portions, at least one fixing portion provided on the vehicle rear side is formed to have a larger thickness dimension than other fixing portions.

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