JP2017061860A - Vehicular cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure that allows an installation work of an electric fan to efficiently be done in a vehicular cooling device in which the electric fan and an engine fan are arranged in an off-set manner.SOLUTION: The vehicular cooling device 1 includes: a shroud 3 disposed between a radiator and an engine and having a hood 7 for accommodating the engine fan 17 therein; and the electric fan 27 disposed while being offset to the engine fan 17. The hood 7 includes: a hood split body 41 including part overlapping on the electric fan 27 in front view; and a hood body 43 to which the hood split body 41 is assembled.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a structure of a cooling device for a vehicle.

  Conventionally, some vehicles such as automobiles are provided with an electric fan for cooling a heat exchanger such as a radiator or an engine fan for cooling an engine (see, for example, Patent Document 1). The electric fan operates the fan with an electric motor and generates an air flow that passes through a heat exchanger such as a radiator to promote heat dissipation of the heat exchanger. The engine fan operates the fan by the engine, generates an air flow toward the engine, and cools the engine. And the circumference | surroundings of an electric fan or an engine fan are enclosed by the hood, and it is comprised so that air may flow into the intended direction.

  Moreover, in the radiator cooling device described in Patent Document 1, the electric fan and the engine fan are arranged such that their rotational axes are offset and part of their blades overlap each other in the rear view. . A crescent-shaped opening is formed in the shroud behind the blades of the electric fan. With this configuration, even when the ventilation resistance due to the engine fan disposed downstream of the electric fan is high, the air flow generated by the electric fan flows to the downstream side of the cooling device through the crescent-shaped opening. I can do it.

JP 2003-20943 A

  However, in the radiator cooling device described in Patent Document 1 described above, the electric fan and the engine fan are arranged so that their rotational axes are offset and part of their blades overlap each other. It was difficult to perform the fan installation work efficiently. Specifically, when the electric fan is attached to the shroud, it is necessary to perform the attaching operation while avoiding the hood surrounding the engine fan provided on the downstream side of the electric fan.

  In addition to the radiator cooling device described in Patent Document 1, in a vehicle cooling device, vibration generated by operating an electric fan or engine fan propagates to a shroud or hood having a certain rigidity, and vibration noise is generated. There is also a problem that is likely to occur.

  According to the present invention, in an automotive cooling device that includes an electric fan and an engine fan, the rotation shafts of which are offset, and a portion of the blades of each other overlap each other, the electric fan can be attached efficiently and vibrations can be achieved. It aims at providing the structure which aimed at the suppression of sound.

  A vehicle cooling device according to the present invention is a cylindrical hood that is disposed between an engine of a vehicle and a heat exchanger provided on the front side of the vehicle with respect to the engine and includes an engine fan that is rotated by the engine. And an electric fan in which a rotating shaft is offset with respect to the rotating shaft of the engine fan and a part of the blades is overlapped in the shroud between the heat exchanger and the engine fan. It is equipped with. The hood includes a hood divided body including a portion overlapping with the electric fan in the front-rear direction of the vehicle, and a hood main body to which the hood divided body is assembled (Claim 1).

  Of the cylindrical hood that contains the engine fan, the hood divided body is the part that overlaps the electric fan in the longitudinal direction of the vehicle (front view or rear view). A cylindrical hood can be easily formed by assembling to the hood body. In this way, it is not necessary to avoid the hood when installing the electric fan, and the installation work can be made more efficient.

The hood divided body has engaging portions that engage with the hood main body at both ends in the extending direction, and the hood main body has a holding portion into which the engaging portion is inserted, and the engaging portions are all in one direction. It is preferable to engage with a corresponding holding part. The hood divided body can be assembled to the hood main body from a desired direction, and the attachment work can be made efficient.

  The hood divided body has an insertion piece that engages with the electric fan in addition to both ends in the extending direction. The electric fan has a receiving portion into which the insertion piece is inserted, and the insertion piece is received from one direction. It is preferable to be inserted into the part (claim 3). The hood divided body is relatively small and light with respect to the cooling device, and even if both ends in the extending direction are engaged with the hood main body by the engaging portion, vibration noise may be generated by the transmitted vibration. In this respect, in addition to the both ends in the extending direction, the configuration is such that the electric fan is engaged at other than both ends, so that vibration noise can be suppressed. Moreover, since the insert pieces can be inserted into the receiving portion from one direction in the same manner as the engaging portions provided at both ends in the extending direction of the hood divided body, it can hinder the efficiency of the mounting operation. Absent.

  The engaging portion has a pair of protrusions provided at both ends in the extending direction of the hood divided body and spaced apart in the front-rear direction of the vehicle, and the holding portion is a sandwiched portion sandwiched between the pair of protrusions (Claim 4). The engaging portions formed as a pair of protrusions sandwich the sandwiched portion in the front-rear direction of the vehicle, so that the hood split body is prevented from moving in the front-rear direction of the vehicle while improving the efficiency of the mounting operation. The

  The electric fan is attached to the shroud via an attachment member having a cylindrical ring that encloses the electric fan. The ring is fixed to the shroud via a fixing portion projecting in the radially outward direction of the ring when it is outward from the hood in the front-rear direction of the vehicle. Alternatively, it may be configured to be fixed to the shroud through a support body extending in the radially outward direction of the ring (claim 5). Even if the shroud tries to vibrate through the ring that encloses the electric fan or the ring by the rotation of the electric fan, the outside of the ring from the hood in the front-rear direction (front view or rear view) of the vehicle passes through the fixing portion. The ring is fixed to the shroud, and the inside of the ring rather than the hood is fixed to the shroud via the support, so that the ring can be prevented from vibrating with a simple configuration.

  The electric fan has an electric motor and an electric fan, and the support has one end fixed to the ring and the other end fixed to the shroud, and the rotation center of the electric motor, one end and the other end, Are preferably arranged on a straight line (Claim 6). Even if the electric motor rotates and becomes a vibration source, the center of the motor is located in the extending direction of the support, so the ring vibrates according to characteristics such as tensile stress and elastic modulus in the longitudinal direction of the support. It can suppress more reliably.

  Of the cylindrical hood that contains the engine fan, the hood divided body is the part that overlaps the electric fan in the longitudinal direction of the vehicle (front view or rear view). A cylindrical hood can be easily formed by assembling to the hood body. Installation work of the electric fan to the cooling device can be made more efficient.

FIG. 1 is a perspective view of a cooling device according to an embodiment of the present invention as viewed obliquely from the rear of a vehicle. FIG. 2 is a rear view of the cooling device according to the embodiment of the present invention as viewed from the rear of the vehicle. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a part of a cross-sectional view taken along line B-B in FIG. 2, and shows the vicinity of the upper ends of the hood divided body and the hood main body. FIG. 5 is a part of a cross-sectional view taken along the line C-C in FIG. 2 and is a view showing the vicinity of the upper end of the bulging portion of the hood divided body. FIG. 6 is a part of a cross-sectional view taken along line DD of FIG. 2 and shows the vicinity of the lower end portion of the hood divided body and the hood main body. FIG. 7 is a perspective view of the cooling device according to the embodiment of the present invention as viewed obliquely from the front of the vehicle. FIG. 8 is an exploded perspective view of FIG. FIG. 9 is an enlarged perspective view of the vicinity of the hood divided body according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following drawings, the front of the vehicle is indicated as FR, the rear of the vehicle is indicated as RR, the right side in the vehicle width direction is indicated as RH, and the left side in the vehicle width direction is indicated as LH.

  As shown in FIGS. 1 to 3, the cooling device 1 according to the embodiment of the present invention extends along a peripheral edge of a shroud 3 formed in a plate shape and an opening 5 formed in the shroud 3. An engine fan hood 7 and an electric fan assembly 9 disposed obliquely on the right side of the hood 7 are provided.

  As shown in FIG. 3, on the vehicle front side of the cooling device 1, a heat exchanger such as a condenser (not shown) of a vehicle air conditioner or a radiator 11 that exchanges heat between the outside air of the vehicle and a heat medium. Is disposed close to the cooling device 1, and the engine 13 is disposed on the vehicle rear side of the cooling device 1. As described above, the cooling device 1 is disposed between the radiator 11 (heat exchanger) and the engine 13. The engine 13 is provided with a rotating shaft 15 protruding forward of the vehicle, and an engine fan 17 is rotatably attached to the rotating shaft 15. The engine fan 17 is housed inside the cylindrical hood 7, and the engine fan 17 is configured to be rotatable inside the hood 7. That is, the cylindrical hood 7 is configured to surround the engine fan 17. Further, as shown in FIG. 2, the engine fan 17 includes a shaft support portion 19 disposed in the radial center portion and a blade 21 extending from the shaft support portion 19 toward the outside in the radial direction.

  As shown in FIG. 2, an electric fan opening 23 is formed at the upper right side of the shroud 3 in the vehicle width direction, and the electric fan assembly 9 is provided along the periphery of the electric fan opening 23. ing. The electric fan assembly 9 includes an attachment member 25 and an electric fan 27 held by the attachment member 25. The attachment member 25 includes a ring portion 29 formed in an annular shape in a rear view, a fixing portion 31 protruding from the outer periphery of the ring portion 29, and a linear shape from the ring portion 29 toward the radially inner side. The leg portion 33 extends, and an annular motor holding portion 35 provided at the tip of the leg portion 33. The electric fan 27 includes a motor unit 37 disposed in the central portion in the radial direction, and a blade 39 that rotates by the rotational driving force of the motor unit 37. Further, the electric fan 27 is held by the attachment member 25 by fixing the motor part 37 of the electric fan 27 to the motor holding part 35. The electric fan assembly 9 is attached to the shroud 3 by fastening the fixing portion 31 to the shroud 3 via bolts. Note that an air flow passing through the radiator 11 is generated by the rotation of the electric fan 27.

  Here, as shown in FIG. 2, the hood 7 includes a hood divided body 41 including a portion overlapping with the electric fan 27 in a rear view and a hood main body 43 that is a portion other than the hood divided body 41. It is configured. As shown in FIG. 2, the hood 7 in this example has a hood main body 43 and a hood divided body 41 at a portion corresponding to 12:00 of the watch that is the upper end in the rear view and a portion corresponding to 3 o'clock of the watch that is the right end. And are engaged. That is, the hood main body 43 extends by 3/4 of the entire circumference, and the hood divided body 41 extends by 1/4 of the entire circumference. Further, the hood main body 43 is provided so as to extend from the shroud 3 and may be formed integrally with the shroud 3 or may be attached separately from the shroud 3. As described above, the electric fan 27 and the engine fan 17 are close to each other in the front-rear direction, the rotation axes of each other are offset (the axis directions of the rotation axes are parallel, but the axis is not on the coaxial line), and the back surface At least a part of them are overlapped in view. As shown in FIG. 7, the electric fan 27 and the engine fan 17 are arranged so that at least a part of the blades overlaps even when viewed from the front.

  As shown in FIGS. 8 and 9, the hood divided body 41 is curved and extends in an arc shape, and a pair of engaging portions spaced apart in the front-rear direction are formed at both ends in the extending direction. Specifically, as shown in detail in FIG. 9, a pair of front and rear protrusions 44 and 45 extend downward as engaging portions at the lower end of the hood divided body 41, and A pair of front and rear projections 47 and 49 also extend downward as an engagement portion at the upper end (the projection 47 is shown in FIG. 4 described later). On the other hand, at the end of the hood main body 43 in the extending direction L, a holding portion that receives the protruding portion of the hood divided body 41 is formed. Specifically, holding portions 51 and 53 whose upper sides are opened are provided at the right end of the hood main body 43. In the holding portions 51 and 53, planar wall portions 55 and 57 extending upward are formed in a pair of front and rear. Further, holding portions 61 and 63 whose upper sides are opened are provided at the upper end portion of the hood main body 43. The holding portions 61 and 63 are formed with a pair of front and rear flat wall portions 65 and 67 extending upward.

  Further, a plurality of vertical ribs 71 extending in a plate shape along the extending direction are provided on the upper surface of the hood divided body 41 at predetermined intervals in the front-rear direction. A plurality of horizontal ribs 73 extending in the front-rear direction are provided at predetermined intervals in the extending direction of the hood divided body 41 so as to be orthogonal to the vertical ribs 71. These vertical ribs 71 and horizontal ribs 73 improve the strength of the hood divided body 41.

  A plate-like bulging portion 75 is integrally formed upward in an intermediate portion in the extending direction of the hood divided body 41. On the vehicle front side of the bulging portion 75, a second engaging portion 77 is provided as an insertion portion (convex portion) that protrudes downward. Further, the motor holding portion 35 of the electric fan assembly 9 is provided with a second holding portion 79 obtained by folding a single plate in a U shape as a receiving portion (concave portion) extending in the vertical direction. As shown in FIG. 9, when the hood divided body 41 is lowered, the insertion piece 77 of the hood divided body 41 is inserted into the receiving portion 79 of the electric fan assembly 9.

  Here, the hood divided body 41 is lowered so that the projections 44, 45, 47, 49 of the hood divided body 41 are inserted into the holding portions 51, 53, 61, 63 of the hood main body 43, and the insertion piece 77 is a receiving portion. The structure in the state inserted in 79 will be described using the cross-sectional views shown in FIGS. Specifically, as shown in FIG. 4, at the upper end portion of the hood divided body 41, a pair of front and rear projections 47 and 49 extend downward from the hood divided body 41. A pair of front and rear holding portions 61 and 63 are provided on the upper end portion of the hood main body 43. In the holding portions 61 and 63, the pair of front and rear wall portions 65 and 67 serve as the sandwiched portions. 41 is sandwiched between a pair of front and rear projections 47 and 49. As shown in FIG. 6, at the lower end of the hood divided body 41, a pair of front and rear projections 44 and 45 extend downward from the hood divided body 41. A pair of front and rear holding parts 51 and 53 are provided at the right end of the hood main body 43, and the pair of front and rear wall parts 55 and 57 provided in the holding parts 51 and 53 serve as the sandwiched parts. It is sandwiched between a pair of front and rear projections 44, 45 of the divided body 41. As described above, the engaging portions of the hood divided body 41 with the hood main body 43 have protrusions 44, 45, 47 serving as movement restraining means for suppressing movement of the hood divided body 41 to the engine fan 17 side. , 49 and walls 55, 57, 65, 67 are provided.

  Further, as shown in FIG. 5, at the upper end of the bulging portion 75 of the hood divided body 41, the insertion piece 77 extends downward by folding the upper end of the bulging portion 75. Since a gap is formed between the bulging portion 75 and the insertion piece 77, the rear wall surface 80 of the receiving portion 79 is inserted into the gap. Thereby, the hood 7 is held by the electric fan 27.

  As shown in FIGS. 2 and 7, a tongue piece 81 protrudes from the ring portion 29 toward the outside in the radial direction at the left side of the ring portion 29 in the electric fan assembly 9 in the vehicle width direction. Further, a fastening portion 85 for fixing the end portion of the support body 83 is formed to protrude on the vehicle front side on the left side in the vehicle width direction in the shroud 3. Therefore, one end 87 of the support 83 made of a long thin plate material is fastened to the tongue piece 81 of the ring portion 29 by the bolt 88, and the other end 89 of the support 83 is bolted to the fastening portion 85 of the shroud 3. It is concluded at 88. And as shown in FIG. 2, the center of the motor part 37 of the electric fan 27, the bolt 88 arrange | positioned at the one end 87 of the support body 83, and the bolt 88 arrange | positioned at the other end 89 of the support body 83, The connecting line L is set to be linear.

  Below, the effect by embodiment of this invention is demonstrated.

(1) The vehicle cooling device structure according to the embodiment of the present invention has an electric fan 27 and an engine fan 17 provided between the radiator 11 (heat exchanger) and the engine 13, and a cylindrical shape surrounding the engine fan 17. The hood 7 is provided, and the electric fan 27 rotates to generate an air flow passing through the radiator 11. The electric fan 27 and the engine fan 17 are close to each other and at least partially overlap with each other when viewed from the front, and the hood 7 is held by the electric fan 27.

  Here, when the electric fan 27 or the engine fan 17 rotates, vibration due to the rotation is transmitted to the hood divided body 41 of the engine fan 17 and vibrates, and vibration noise may be generated. However, in this embodiment, since the hood 7 hood divided body 41 is held by the electric fan 27, the vibration noise of the hood 7 can be efficiently suppressed with a simple structure.

(2) The hood 7 is configured by assembling a hood divided body 41 including a portion overlapping the electric fan 27 in a front view and a hood main body 43 which is a portion other than the hood divided body 41. The hood 7 is held on the electric fan 27 by coupling the electric fan 27 to the electric fan 27.

  The hood 7 includes a hood divided body 41 including a portion overlapping with the electric fan 27 in a front view. Therefore, the electric fan 27 can be assembled with the hood divided body 41 removed, and then the hood divided body 41 can be coupled to the electric fan 27, so that the electric fan 27 can be assembled efficiently. . In addition, by removing the hood divided body 41 from the cooling device 1, the electric fan 27 can be removed efficiently.

(3) A movement restraining means for restraining the hood divided body 41 from moving to the engine fan 17 side is provided at an engaging portion of the hood divided body 41 with the hood main body 43.

  The movement restraining means restrains the hood divided body 41 from moving to the engine fan 17 side. Therefore, it is possible to efficiently suppress the hood divided body 41 from interfering with the engine fan 17.

(4) The movement suppressing means includes a pair of projections 44, 45, 47, 49 provided on the hood divided body 41 and a pair of projections 44, 45, 47, 49, respectively. And holding portions 51, 53 and 61, 63 of the hood main body 43 sandwiched between the two.

  The protrusions 44 and 45 provided on the hood split body 41 hold the holding parts 51 and 53 of the hood main body 43 therebetween, and similarly the protrusions 47 and 49 hold the holding parts 61 and 63 of the hood main body 43 therebetween. Therefore, the hood divided body 41 can be reliably coupled to the hood main body 43. In addition, since the pair of protrusions 44 and 45 of the hood split body 41 only have to hold the holding parts 51 and 53 of the hood main body 43 and the pair of protrusions 47 and 49 need to hold the holding parts 61 and 63, respectively. The attachment work of the body 41 becomes easy.

(5) The hood divided body 41 is provided with an insertion piece 77 (convex portion). The insertion piece 77 is formed to be engageable with a receiving portion 79 (concave portion) provided on the electric fan 27. ing. The hood 7 is held by the electric fan 27 by engaging the insertion piece 77 of the hood divided body 41 with the receiving portion 79 of the electric fan 27.

  Here, the protrusions 44, 45, 47, and 49 of the hood divided body 41 protrude along the protruding direction (one direction) of the insertion piece 77. For this reason, if the hood divided body 41 is moved along the protruding direction of the protrusions 44, 45, 47, 49, the attaching operation for coupling the hood divided body 41 to the hood main body 43, and the hood divided body 41 as an electric fan. 27 can be carried out simultaneously with the work held by the hood 27, so that the work of assembling the hood divided body 41 can be made more efficient.

(6) The vehicle cooling device structure according to the embodiment of the present invention includes the shroud 3 in which the hood 7 and the electric fan 27 are disposed, and the motor portion 37 of the electric fan 27 is attached to the shroud 3 via the attachment member 25. It has been. The fixing member 31 is attached to the shroud 3 via the support body 83 in addition to the fixing portion 31 being attached to the shroud 3 via bolts. At this time, the line L connecting the center of the motor unit 3 (the center of rotation), the one end 87 of the support 83 and the other end 89 of the support is positioned so as to be linear.

  Therefore, even if the motor unit 37 is operated to rotate the electric fan 27 and vibration is generated, the center of the motor unit 37 that is a vibration source is located in the extending direction of the support body 83. The vibration is effectively damped according to characteristics such as tensile stress and elastic modulus in the longitudinal direction.

  By the way, the vehicle cooling device structure of the present invention has been described by taking the above-described embodiment as an example. However, the present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention. it can.

  For example, the engaging portions provided in the hood divided body 41 are projection portions 44, 45, 47, 49, and the holding portions 61, 63, 65, 67 are inserted into the respective projection portions 44, 45, 47, 49. However, the holding portion may be formed in a protruding shape and the engaging portion may be inserted into the protruding holding portion. It is only necessary that the hood divided body 41 can be assembled to the hood main body 43 from one direction (a predetermined direction), and which of the engaging part and the holding part is a projection is designed appropriately. It only has to be done.

  Similarly, in the middle of the hood divided body 41, the second engaging portion is formed as an insertion portion (convex portion) that protrudes downward, and the second holding portion extends in the vertical direction. Although described as a (recessed portion), the second holding portion may be formed as an insertion portion (convex portion) and may be formed as a second engaging portion as a receiving portion (recessed portion). It is only necessary that the hood split body 41 can be assembled to the hood main body 43 from one direction (a predetermined direction), and either the second engaging portion or the second holding portion is convex. It may be designed as appropriate.

3 Shroud 7 Hood 11 Radiator (Heat exchanger)
13 Engine 17 Engine fan 27 Electric fan 37 Motor part 41 Hood division body 43 Hood main body 44, 45, 47, 49 Engagement part (protrusion part)
51, 53, 61, 63 Holding portion 77 Second engaging portion 79 Second holding portion 83 Support body 87 One end 89 The other end

Claims (6)

Arranged between the engine of the vehicle and a heat exchanger provided on the front side of the vehicle with respect to the engine,
A shroud having a cylindrical hood containing an engine fan rotated by the engine;
In the shroud between the heat exchanger and the engine fan, an electric fan in which the rotation axis is offset with respect to the rotation axis of the engine fan and a part of the blades is overlapped. Prepared,
The said hood has the hood division body containing the site | part which overlaps with the said electric fan in the front-back direction of the said vehicle, and the hood main body by which this hood division body is assembled | attached. The hood divided body has engaging portions that engage with the hood main body at both ends in the extending direction,
The hood body has a holding portion that is engaged with the engaging portion,
2. The vehicle cooling device according to claim 1, wherein the engaging portion engages with the corresponding holding portion from one direction. The hood divided body has a second engagement portion that engages with the electric fan in addition to both ends in the extending direction,
The electric fan has a second holding part into which the insertion piece is inserted,
3. The vehicle cooling device according to claim 2, wherein the second engaging portion engages with the corresponding second holding portion from the one direction. 4. The engaging portion has a pair of protrusions provided at both ends in the extending direction of the hood divided body and spaced apart in the front-rear direction of the vehicle.
4. The vehicle cooling device according to claim 2, wherein the holding portion includes a sandwiched portion that is sandwiched between the pair of projecting portions. 5. The electric fan is attached to the shroud via an attachment member having a cylindrical ring containing the electric fan,
In the longitudinal direction of the vehicle, the ring is
On the outside of the hood, while being fixed to the shroud via a fixing portion protruding radially outward of the ring,
The vehicle according to any one of claims 1 to 4, wherein the vehicle is fixed to the shroud through a support body extending radially outward of the ring at an inner side than the hood. Cooling system. The electric fan has an electric motor and an electric fan,
One end of the support is fixed to the ring, the other end is fixed to the shroud, and the rotation center of the electric motor, the one end, and the other end are arranged on a straight line. The vehicle cooling device according to claim 5.

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