JP2009156176A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device capable of stably supplying cooling air to a motor driving a fan with using gear drive. <P>SOLUTION: The cooling device comprises: a blower 10 disposed with facing to a rear side surface of a core part 2 of a radiator 1 and supplying cooling air to the core part 2; a fan shroud 30 disposed in a rear of the core part 2, supporting the blower 10 to cover the same, and guiding cooling air passing through the core part 10 to the rear of the blower 10; a motor 19 rotationally driving a rotary shaft 13 of the blower; a drive shaft 17 of the motor extended in parallel with the core part 2 and connected to the rotary shaft 13 of the blower via each gear 14, 15, 16; and a blower 20 for cooling the motor including a rotary shaft 18 coaxial with the drive shaft 17 of the motor, having the rotary shaft 18 rotated with accompanying rotation of the drive shaft 17 of the motor, and supplying cooling air to the motor 19. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cooling device that provides cooling air to a heat exchanger by a fan that uses gear drive, and is particularly suitable for a cooling device that provides cooling air to a radiator mounted on a vehicle.

  Conventionally, for example, a cooling device described in Patent Document 1 is known as a cooling device that provides cooling air to a heat exchanger by a fan using gear drive. This cooling device includes a plurality of blower fans arranged in parallel to face the heat exchanger core, and a single drive motor that rotationally drives these blower fans, and is further parallel to the heat exchanger core. The rotation drive shaft of the drive motor extending to the rotation shaft and the rotation shafts of the plurality of blower fans are connected to each other via gears. Then, when the rotational drive shaft of the drive motor is rotated, the rotational shafts of the plurality of blower fans are rotated along with this, and the air in front of the heat exchanger core is sucked backward, and the heat exchanger core is Provides cooling air to cool.

Furthermore, the shroud arranged in the vicinity of the drive motor and covering the outer periphery of the blower fan is provided with a hole through which the rotary drive shaft passes. When a plurality of blower fans rotate, the air around the drive motor bypasses the heat exchanger core and passes around the drive motor, and is guided to the negative pressure side of the blower fan through this hole. It will be cooled.
JP 2006-145177 A

  However, in the cooling device described in Patent Document 1, the drive motor is cooled by applying cooling air using the negative pressure of the blower fan to the drive motor. However, when the air volume of the blower fan is small, etc. May not be able to use the negative pressure sufficiently, and there is a problem that stable cooling air cannot always be provided to the drive motor. In the first place, the blower fan is a device for cooling the heat exchanger, and if the cooling air to the drive motor is increased, the ability to cool the original heat exchanger cannot be secured.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a cooling device that can provide stable cooling air to a motor that drives a fan using gear drive.

The present invention employs the following technical means to achieve the above object. 1st invention which concerns on a cooling device is arrange | positioned facing the back side surface of the core part (2) which is a heat exchange part of a heat exchanger (1), and the air blower which gives cooling air with respect to a core part (2) (10) and a fan shroud disposed behind the core part (2) so as to cover the outer periphery of the blower (10) and guiding the cooling air passing through the core part (2) to the rear of the blower (10) (30), a motor (19) for rotationally driving the rotating shaft (13) of the blower, and a rear portion of the core (2) extending in parallel to the rotating shaft (13) of the blower (14, 15, 16) a motor drive shaft (17) connected via a motor, and a motor cooling fan (20) for providing cooling air to the motor (19),
A rotating shaft (18) which is provided coaxially with the drive shaft (17) of the motor and rotates integrally;
When the motor drive shaft (17) is rotated, the motor cooling fan (20) rotates the rotating shaft (18) to supply cooling air to the motor (19), and the fan (10) is a fan. The rotating shaft (13) is rotated through gears (14, 15, 16) to give cooling air to the core part (2).

  According to the present invention, by providing the motor cooling fan having the rotating shaft that is coaxial with the drive shaft of the motor for driving the heat exchanger cooling fan via the gear coupling mechanism, the heat exchanger cooling Since the motor cooling fan can be rotated together with the driving of the fan, a desired amount of cooling air can be supplied to the motor regardless of the amount of air blown to the heat exchanger, and the motor cooling capacity can be ensured. Therefore, stable cooling air can be given to the motor of the fan using gear drive.

The motor drive shaft (17) includes a shaft (17b) coupled to the rotation shaft (13) of the blower via gears (14, 15, 16), and a motor directly connected to the motor (19). It consists of a rotating shaft (17a)
The rotation shaft (17a) and the shaft (17b) of the motor are connected so as to be coaxial by the joint member (60),
The joint member (60) is preferably formed integrally with the blade boss portion (22C) including the rotating shaft (18) of the motor cooling fan (20C).

  According to this invention, the size of the cooling device in the motor drive shaft extending direction can be reduced, and the device can be miniaturized. In addition, since the blade boss and the joint member can be used together, the number of parts and the number of assembly steps can be reduced.

  In addition, the cooling device communicates the blow-out side of the fan for cooling the motor (20) and the negative pressure region of the fan (10), and is an air discharge opening that opens in front of the blade (11) of the fan (10). (33B) is preferably provided.

  According to this invention, the air volume of the cooling air to the motor can be further increased by using the suction force of the blower, and the motor cooling capacity can be further enhanced.

  Furthermore, it is preferable to provide an air discharge opening (34C) that allows the blower side of the motor cooling fan (20A) to communicate with the blower side region of the blower (10). According to the present invention, even when the air volume of the blower is small or when the space for forming the air discharge opening that communicates the blow-out side of the blower for motor cooling and the negative pressure area of the blower cannot be sufficiently taken, The air volume of the motor cooling air can be ensured by the air volume of, and a cooling device having a stable motor cooling capacity can be provided.

  The motor cooling blower (20) preferably includes a centrifugal fan. According to the present invention, it is possible to provide a cooling device that can ensure a predetermined air volume even when the ventilation path of the motor cooling air has a high pressure loss. In particular, the effect of preventing the air heated by passing through the heat exchanger from flowing back into the ventilation path of the motor cooling air is great.

In the cooling device, the motor (19) is connected to the end of the drive shaft (17) of the motor, and immediately after the heat exchanger (1), together with the motor cooling fan (20A), in the motor case (31A). Has been placed,
The motor case (31A) is preferably formed with an air introduction opening (32A) for sucking external air into the outer peripheral edge of the side surface on the opposite side of the motor drive shaft (17). According to this invention, the size of the cooling device in the direction in which the motor drive shaft extends is suppressed, and the external air flows along the outer periphery of the motor, so that the cooling device that further improves the effect of cooling the motor is provided. it can.

  The motor (19) is provided in the motor case (31D) together with the motor cooling fan (20A) and the control device (40) for controlling the motor cooling fan (20A). ) Has a partition wall (35) that partitions and forms a motor installation space (37) in which the motor (19) is arranged and a control device installation space (36) in which the control device (40) is arranged. The external air sucked into the motor case (31D) by the motor cooling fan (20A) has an air introduction opening (32D) formed in the motor case (31D) from the air introduction opening (32D). After being sucked in, the control device (40) is cooled in the control device installation space (36), and then flows into the motor installation space (37) to cool the motor (19). Is preferably discharged to the outside of the (31D).

  According to the present invention, the control device can be preferentially cooled over the motor, and the external air passes through a path formed by the partition wall, so that the cooling air passing speed applied to the control device is improved. The cooling effect can be further enhanced.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those described previously. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination is not particularly troublesome.

(First embodiment)
1st Embodiment which is one Embodiment of this invention is described using FIG. FIG. 1 is a schematic cross-sectional view of the cooling device according to the first embodiment when viewed from above. The X direction in FIG. 1 indicates one direction of the cooling device in the left-right width direction (vehicle left-right direction), and the Y direction indicates the front direction of the cooling device (vehicle forward direction).

  As shown in FIG. 1, the cooling device of the present embodiment is disposed so as to face the rear side surface of the core part 2 that is a heat exchange part of a radiator 1 that is an example of a heat exchanger, and passes through the core part 2. The blower 10 that gives wind and the rear of the core unit 2 (the direction opposite to the Y direction) is supported so as to cover the blower 10, and the cooling air that has passed through the core unit 2 is behind the blower 10 (opposite to the Y direction). Direction), a fan shroud 30 having a cylindrical portion, a motor 19 that rotationally drives the rotary shaft 13 of the blower, and a core portion 2 that extends in parallel to the rotary shaft 13 of the blower. And a rotating shaft 18 coaxial with the driving shaft 17 of the motor, and the rotating shaft 18 is rotated as the driving shaft 17 rotates. Motor cooling fan 20 that provides cooling air , And a.

  The radiator 1 includes a plurality of tubes through which cooling water of the vehicle engine flows, a core portion 2 including fins disposed between the tubes, and a plurality of tubes connected to both ends of the tubes to distribute and collect fluids. The tank portion 3 and an insert member that protects the core portion 2 are provided. An inlet pipe connected to the piping of a radiator circuit formed between the engine and the radiator 1 is provided on the rear side of one tank portion 3 in order to introduce engine cooling water into the tank portion 3. It is provided so as to protrude to the side. On the back side of the other tank part 3, an outlet pipe connected to the pipe of the radiator circuit is provided so as to protrude to the engine side in order to allow the engine coolant to flow out from the tank part 3 to the radiator circuit.

  The fan shroud 30 is attached to the radiator 1 for dissipating the heat of the engine cooling water, and covers and supports two axial-flow type fans 10 arranged in parallel to provide the cooling air to the radiator 1. The fan shroud member. The two blowers 10 are rotationally driven by a single motor 19 by gear driving described later.

  The fan shroud 30 includes a ring-shaped portion formed in a circular shape surrounding the outer periphery of a plurality of blades 11 formed radially extending from the blade boss portion 12 to which the rotating shaft 13 of the blower is fixed. . In the fan shroud 30, the cylindrical portion formed from the outer peripheral edge portion of the core portion 2 to the inner peripheral edge portion of the ring-shaped portion constitutes a wind tunnel portion, and an air flow for efficiently sucking the outside air passing through the core portion 2. It contributes to the formation of.

  Each blower 10 is disposed downstream of the radiator 1 with respect to the flow direction of the cooling air passing through the core portion 2, and the rotation shaft 13 of the blower extending in the front-rear direction of the vehicle is driven to rotate. Air is sucked from the front grille toward the engine. The motor 19 that rotates the blower 10 by driving through a gear is an electric type, for example, a ferrite type DC motor. A harness part for supplying electric power to the armature is connected to the motor, and the harness part is connected to a vehicle battery via a connector or the like.

  The motor 19 is disposed at the end of the drive shaft 17 of the motor and at a position protruding outward in the left-right direction from the radiator 1. That is, the motor 19 is arranged so as to be shifted from the side of the radiator 1 by a predetermined distance outward (in the anti-X direction) in the left-right direction of the vehicle. According to this configuration, the thickness of the entire cooling device in the vehicle front-rear direction (Y direction in the drawing) can be reduced.

  In the motor case 31, the motor 19 is housed, and an air introduction opening 32 that opens forward on the side of the tank portion 3 of the radiator 1 and an inward / outward direction in the vehicle left-right direction behind the tank portion 3 ( An air discharge opening 33 that opens in the (X direction) is formed. The downstream end portion of the motor case 31 may constitute a part of the wind tunnel portion of the fan shroud 30.

  The motor case 31 may be a resin molded member integrated with the fan shroud 30. In this case, the motor case 31 is molded by injection molding using a predetermined mold. The motor case 31 is made of, for example, a polypropylene resin whose strength is increased by glass fiber or talc material. In addition, the motor case 31 may be configured as a separate component from the fan shroud 30. In this case, after the motor case 31 is manufactured separately from the fan shroud 30, it is integrated with the fan shroud 30 or the vehicle side member. It is attached.

  The motor drive shaft 17 extends behind the blades 11 of the blower 10 and extends inwardly in the vehicle left-right direction (X direction) from the motor 19 in parallel with the core portion 2. The side gear 15 is fixed, and the first main driving side gear 15 meshes with the driven side gear 14 provided on the rotating shaft 13 of one blower located closer to the motor 19. Further, a second main drive side gear 16 is fixed to the tip of the motor drive shaft 17, and the second main drive side gear 16 is a follower provided on the rotary shaft 13 of the other blower located far from the motor 19. It meshes with the side gear 14.

  Thus, the meshing of the first driving gear 15 and the driven gear 14 causes the rotational driving force of the motor 19 to communicate with the driven gear 14 via the first driving gear 15 that rotates together with the drive shaft 17 of the motor. One fan that is transmitted to the rotating shaft 13 of the integrated blower and located closer to the motor 19 rotates. Further, due to the meshing of the second main driving side gear 16 and the other driven side gear 14, the rotational driving force of the motor 19 is connected to the driven side gear 14 via the second main driving side gear 16 rotating together with the drive shaft 17 of the motor. The other fan located at a position far from the motor 19 is transmitted to the rotating shaft 13 of the blower that is integral.

  The first main driving side gear 15, the second main driving side gear 16 and the driven side gear 14 are constituted by, for example, a helical gear or a bevel gear so that the main driving side gear and the driven side gear mesh with each other. The gear ratio between the main drive side gear and the driven side gear can be arbitrarily selected within a predetermined range. By making the gear ratio of the driven gear 14 to the first main driving side gear 15 different from the gear ratio of the driven side gear 14 to the second main driving side gear 16, the air volume of the one fan 10 and the other fan It is also possible to vary the air volume of 10. In addition, by adjusting the gear ratio, the motor cooling air amount by the motor cooling fan 20 and the cooling air amount of the radiator 1 can be set in an appropriate air amount relationship.

  The motor cooling blower 20 includes a rotating shaft 18 and includes a blade boss portion 22 that supports the blade 21 and a plurality of blades 21 extending radially from the blade boss portion 22, and is formed in the blade boss portion 22. An axial-flow fan configured by arranging the rotary shaft 18 so as to coincide with the drive shaft 17 of the motor, for example, a propeller fan can be adopted.

  The motor cooling blower 20 generates an air flow directed inward in the vehicle left-right direction (X direction in the drawing) from the motor 19 side of the plurality of blades 21 by the rotation of the rotation shaft 18 as the drive shaft 17 of the motor rotates. Then, external air is drawn into the motor case 31 from the side of the tank portion 3 to flow around the motor 19 and blown out in the X direction to cool the motor 19. That is, when the motor drive shaft 17 rotates, each of the motor cooling fan 20, one fan 10, and the other fan 10 rotates at a rotation number corresponding to the adjusted gear ratio, and the radiator 1 and the motor 19 are rotated. Cooling takes place simultaneously.

  Due to the recent demand for downsizing of the vehicle casing and the reduction of the component arrangement space in the engine room due to the increase in electrical components accompanying the performance enhancement of the automobile, the entire cooling device including the radiator 1, the blower 10, the gear drive mechanism and the motor 19 The physique needs to be as small as possible. Therefore, by adopting the configuration of the cooling device of the configuration according to the present embodiment, it is possible to shorten the length of the cooling device in the vehicle front-rear direction, and provide a product that combines the cooling capability of the heat exchanger and the motor cooling capability. can do.

  As described above, the cooling device of the present embodiment is arranged in parallel so as to face the rear side surface of the core portion 2 of the radiator 1, the two blowers 10 that supply cooling air to the core portion 2, and the core The fan shroud 30 that is arranged behind the part 2 and guides the cooling air that has passed through the core part 2 to the rear of the blower 10, the motor 19 that rotationally drives the rotary shaft 13 of the blower, and the rear of the core part 2 extend in parallel. The motor drive shaft 17 is connected to the rotation shaft 13 of the blower via the respective gears 14, 15, and 16, and the rotation shaft 18 is coaxial with the motor drive shaft 17. And a motor cooling blower 20 that provides cooling air to the motor 19 by rotating the rotary shaft 18 as the motor rotates.

  According to this configuration, the motor cooling fan 20 can be rotationally driven together with the fan 10 that cools the radiator 1, and a desired cooling air volume can be supplied to the motor 19 regardless of the cooling air volume to the radiator 1. A cooling device capable of ensuring a desired motor cooling capacity is obtained.

(Second Embodiment)
2nd Embodiment demonstrates the 1st example, the 2nd example, and the 3rd example at the time of arranging the motor 19 behind the radiator 1 as another form of the cooling device based on this invention according to FIGS. . 2, 3, and 4 are schematic cross-sectional views of the first example, the second example, and the third example of the cooling device according to the present embodiment as viewed from above. FIG. 5 is a schematic side view when the motor 19 of the cooling device shown in FIGS. 2 to 4 is viewed from the side (when viewed in the X direction). 2 to 4, the X direction indicates one direction of the cooling device in the left-right width direction (vehicle left-right direction), and the Y direction indicates the front direction of the cooling device (vehicle forward direction).

  As shown in FIG. 2, the first example of this embodiment is such that the motor 19 is behind the tank unit 3 and the left and right sides of the vehicle body member 4 (member that supports the radiator 1) with respect to the cooling device of the first embodiment. The difference is that it is located inward in the width direction (X direction). Other configurations are the same as those of the cooling device of the first embodiment, and the operational effects associated with configurations having the same reference numerals are also the same as those of the first embodiment.

  The motor 19 is housed in the motor case 31A, and the entire side surface of the motor 19 in the left-right direction of the vehicle (the surface perpendicular to the motor drive shaft 17) is exposed toward the side of the cooling device. An air introduction opening 32A that opens largely to the outer peripheral edge of the side surface on the opposite side of the drive shaft 17, and an opening toward the inside and outside of the vehicle in the left-right direction (X direction) at the rear of the tank unit 3 and the blowout region of the blower 10 An air discharge opening 33A is formed.

  The downstream end portion of the motor case 31 </ b> A may constitute a part of the wind tunnel portion of the fan shroud 30. Similarly to the motor case 31, the motor case 31A may be formed of a resin molded member that is integral with the fan shroud 30. In this case, the motor case 31A is made of a polypropylene resin whose strength is increased by glass fiber or talc material. Further, the motor case 31 </ b> A may be configured and assembled with a component separate from the fan shroud 30.

  The motor cooling blower 20A in the cooling devices of the first example, the second example, and the third example is provided immediately after the tank unit 3 of the radiator 1 in the motor cooling fan 20A. In comparison with the above, the diameter dimension of the blade boss portion 22A and the blade 21A can be increased to the blade diameter dimension of the same degree as the length of the motor 19 in the front-rear direction. Thereby, the air volume of motor cooling fan 20A increases, and the motor cooling capacity can be further enhanced.

  As shown in FIG. 3, in the second example of the present embodiment, the motor 19 is arranged behind the tank unit 3 and the position of the air introduction opening 32B of the motor case 31B is compared to the first example. Although the same, the position of the air discharge opening 33B from which the air drawn into the motor case 31B by the motor cooling fan 20A is blown out is different. Other configurations are the same as those of the cooling device of the first example, and the operational effects associated with the configurations denoted by the same reference numerals are the same as those of the first example.

  Specifically, the air discharge opening 33 </ b> B is opened closer to the core 2 than the blade 11 of the blower 10 (a position ahead of the blade 11), and is a negative pressure region of the blower 10 on the suction side of the blower 10. It is provided in (the suction area of the blower 10). With this configuration, the air in the motor case 31B is blown out downstream by the motor cooling fan 20A, and the suction force by the fan 10 is also used, so that the air is drawn from the front of the radiator 1 to the rear side of the core part 2. It will be carried to the rear of the blower 10 together with the outside air. Thereby, the air volume of the cooling air which passes the circumference | surroundings of the motor 19 can be further increased using the attraction | suction force of the air blower 10, and a motor cooling capability can be improved further.

  The motor 19 is accommodated in the motor case 31 </ b> B, and the downstream side of the motor case 31 </ b> B constitutes a part of the wind tunnel portion of the fan shroud 30. The air discharge opening 33 </ b> B is also formed to open to the fan shroud 30, and is also formed to open to the wind tunnel portion of the fan shroud 30. The motor case 31B has an air introduction opening 32B that opens largely on the side of the motor 19 so as to expose the entire side surface of the motor 19 in the left-right direction of the vehicle (a surface orthogonal to the drive shaft 17 of the motor), and a fan shroud 30. An air discharge opening 33B that is opened so as to allow communication between the interior of the motor case 31B and the negative pressure region of the blower 10 (the region on the front side of the blades 11) is formed at the downstream end portion that constitutes a part of the wind tunnel portion. Has been.

  Due to the positional relationship between the air introduction opening 32B and the air discharge opening 33B, when the motor cooling blower 20A is operated, the air existing outside the motor 19 in the left-right direction of the motor 19 passes through the air introduction opening 32B. The motor 19 flows from the entire circumference of the motor 19 into the motor case 31B, wraps around the side surface of the motor 19 in the vehicle lateral direction (X direction), passes through the downstream side of the motor cooling fan 20A, and moves to the front of the vehicle. The air is blown out from the air discharge opening 33B to the negative pressure region of the blower 10 (the region on the front side of the blade 11). At this time, out of the air that flows into the motor case 31B from the entire circumference of the motor 19, the air that flows from the vehicle rear side portion flows while touching the outer surface of the motor 19 on the vehicle rear side, and the air discharge opening 33B. In the process of moving toward the vehicle, the outer surface of the motor 19 on the vehicle front side is also touched, so that the entire outer peripheral surface of the motor 19 is effectively cooled in the entire cooling air path.

  Further, the motor case 31B may be formed of a resin molded member that is integral with the fan shroud 30 similarly to the motor case 31. In this case, the motor case 31B is made of polypropylene resin whose strength is increased by glass fiber or talc material. . Further, the motor case 31B may be configured and assembled by a separate component from the fan shroud 30.

  As shown in FIG. 4, in the third example of the present embodiment, the air discharge opening 34 </ b> C is provided not only on the air discharge opening 33 </ b> C on the vehicle front side of the motor case 31 </ b> C but also on the vehicle rear side as compared with the second example. Is different. Other configurations are the same as those of the cooling device of the second example, and the operational effects associated with the configurations denoted by the same reference numerals are the same as those of the second example.

  That is, the air discharge opening 33 </ b> C is the same opening as the air discharge opening 33 </ b> B of the second example, and is opened closer to the core portion 2 (front position) than the blade 11 of the blower 10. Is provided in the negative pressure region. Further, the motor case 31C is also formed with an air discharge opening 34C that opens rearward of the motor drive shaft 17 on the rear side of the vehicle. Also in this case, the motor case 31C constitutes a part of the wind tunnel portion of the fan shroud 30. In other words, the air discharge opening 33 </ b> C is also formed to open to the fan shroud 30, and is also formed to open to the wind tunnel portion of the fan shroud 30.

  The motor case 31B has an air introduction opening 32C similar to the air introduction opening 32A of the first example. Further, the air discharge opening 33C and the air discharge opening 34C may be a single opening in which both are connected to each other. For example, the inner wall surface (X direction) of the motor case 31C in the lateral direction of the vehicle. It can comprise by the opening part opened by.

  With this configuration, the air sucked into the motor case 31C from the air introduction opening 32B flows while touching the outer surface of the motor 19 on the front side of the motor 19 by the suction force of the motor cooling fan 20A and the fan 10, and forward of the vehicle ( Flowing while touching the outer surface of the motor 19 on the vehicle rear side by the suction force of the motor cooling fan 20A and the path A blown out from the air discharge opening 33C in the Y direction) to the negative pressure region of the fan 10 and the rear of the vehicle ( It is divided into a route B blown out from the air discharge opening 34C in the Y direction) to the rear region of the blower 10.

  For this reason, when the air volume of the blower 10 is large, the air volume of the route A can be increased using the suction force of the blower 10. In addition, when the air volume of the blower 10 is small, or when the opening area of the air discharge opening 33C is small because the space for forming the air discharge opening 33C cannot be obtained due to a demand for downsizing, the suction of the blower 10 is performed. The air volume in the path B can be ensured by the suction force of the motor cooling fan 20A without using much force. Thus, the cooling device of the third example can stably secure the motor cooling capacity.

  Further, the motor case 31C may be formed of a resin molded member that is integral with the fan shroud 30 similarly to the motor case 31. In this case, the motor case 31C is made of polypropylene resin whose strength is increased by glass fiber or talc material. . Further, the motor case 31C may be configured and assembled by a component separate from the fan shroud 30.

  The cooling device of this embodiment can shorten the length of the cooling device in the left-right direction of the vehicle by having the above-described configuration, and maximizes the core portion 2 of the radiator 1 in the allowable installation space in the left-right direction of the vehicle. In addition to the motor cooling capacity, the cooling capacity of the heat exchanger can be further improved. In particular, the cooling device of this configuration is useful when the space for mounting the cooling device is strict in the left-right direction of the vehicle and there is a relatively large margin in the front-rear direction of the vehicle.

  Further, as shown in FIG. 4, since the air sucked into the motor case 31A from the air introduction opening 32A flows along the entire circumference of the motor 19, the effect of cooling the motor 19 is further improved. .

(Third embodiment)
In 3rd Embodiment, what comprised the fan 20B for motor cooling with the centrifugal fan as another form of the cooling device which concerns on this invention is demonstrated according to FIG. FIG. 6 is a schematic cross-sectional view of the cooling device according to the present embodiment when viewed from above. In FIG. 6, the X direction indicates one direction of the left and right width direction (vehicle left-right direction) of the cooling device, and the Y direction indicates the front direction of the cooling device (vehicle forward direction).

  As shown in FIG. 6, the cooling device of the present embodiment is different from the cooling device of the second example of the second embodiment in that the motor cooling blower 20 </ b> B is configured by a centrifugal fan. Other configurations are the same as those of the cooling device of the second example, and the operational effects associated with the configurations denoted by the same reference numerals are the same as those of the second example.

  The motor cooling blower 20B is arranged so that the rotating shaft 18 formed on the blade boss portion 22B is aligned with the drive shaft 17 of the motor, and is placed from the center of the blade boss portion 22B to the entire circumference of a portion having a predetermined pitch circular dimension. A disk-shaped centrifugal fan having a plurality of blades 21B provided and having a predetermined fan diameter and fan height. For example, a sirocco fan or a turbo fan can be used. By adopting a centrifugal fan, high pressure can be achieved even when the motor cooling air path is complicated, the passage cross-sectional area is small, or the space on the downstream side in the axial direction of the fan (X direction in the vehicle left-right direction) is small. The motor cooling fan 20A that can cope with the loss and can secure a predetermined air volume is obtained.

  In the fan 20B for cooling the motor, the centrifugal fan is rotated by the rotation of the rotary shaft 18 as the drive shaft 17 of the motor rotates, so that the air outside the cooling device enters the motor case 31B from the air introduction opening 32B. Inhaled. The air sucked into the motor case 31B is sucked into the fan in the X direction in the left-right direction of the vehicle from the suction port at the center of the fan opening on the motor 19 side, and passes between the plurality of blades 21B arranged on the outer periphery of the fan. Then, the air is blown in the centrifugal direction (radial direction) of the fan, and flows out to the negative pressure region of the blower 10 through the air discharge opening 33B.

  Thereby, the air in the motor case 31B receives the suction force by the blower 10 as well as the suction force by the motor cooling blower 20B, and the rear of the blower 10 together with the outside air drawn from the front of the radiator 1 to the rear side of the core portion 2. Carried. Therefore, even if the pressure loss of the motor cooling air path is high, the air volume of the motor cooling air can be ensured and further increased by using the suction force of the blower 10, so that the motor cooling capacity can be further enhanced.

  Further, according to the motor cooling blower 20A, since the fan that is strong against high pressure loss is provided even in a situation where there is no room in the left and right installation space of the cooling device, the air warmed through the radiator 1 is supplied to the motor. A phenomenon of backflow in the case 31B can be prevented.

(Fourth embodiment)
In the fourth embodiment, as another embodiment of the cooling device according to the present invention, a cooling device configured such that the cooling air introduced by the motor cooling fan 20 </ b> A flows through a path for cooling the control device 40 and the motor 19. A description will be given with reference to FIGS. FIG. 7 is a schematic cross-sectional view of the cooling device according to the present embodiment when viewed from above. In FIG. 7, the X direction indicates one direction of the left and right width direction (vehicle left-right direction) of the cooling device, and the Y direction indicates the front direction of the cooling device (vehicle forward direction). FIG. 8 is a schematic side view showing an internal configuration when the motor 19 is viewed in the X direction. FIG. 9 is a schematic side view when the motor of the cooling device is viewed from the back (when viewed in the Y direction). 8 and 9, the Z direction indicates the upward direction.

  As shown in FIGS. 7-9, the motor 19 and the control apparatus 40 are accommodated in motor case 31D. A partition wall 35 is provided between the motor 19 and the control device 40 inside the motor case 31D. The control device 40 includes a control circuit board and various electrical components, and includes a heat radiation fin 41 that crosses the passage of the cooling air, and is placed on the upper surface of the partition wall 35 provided above the motor 19. ing.

  In the motor case 31 </ b> D, the side wall on the blower 10 side, which is one direction in the left-right direction of the vehicle, constitutes a part of the wind tunnel portion of the fan shroud 30. The motor case 31 </ b> D includes an air introduction opening 32 </ b> D that opens at an upper portion of an outer side surface in the left-right direction of the vehicle (a side surface on the opposite side of the motor drive shaft 17), and a downstream side that constitutes a part of the wind tunnel portion of the fan shroud 30. An air discharge opening 33 </ b> D that is opened so as to communicate the inside of the motor case 31 </ b> D and the negative pressure region (the region on the front side of the blades 11) of the blower 10 is formed at the site. In other words, the air discharge opening 33 </ b> D is formed so as to open to the fan shroud 30, and is also formed to open to the wind tunnel portion of the fan shroud 30. Further, the motor case 31D is formed with an air discharge opening 34D that opens rearward of the motor drive shaft 17 on the rear side of the vehicle.

  Due to the positional relationship between the air introduction opening 32D and the air discharge opening 33D, the air existing outside the motor 19 in the left-right direction of the motor 19 is moved from the air introduction opening 32D to the motor case when the motor cooling fan 20A is operated. It is sucked into 31D. Then, in the motor case 31D, the air flows toward the rear of the vehicle, and passes through the periphery of the fin 41 extending in the X direction from the side surface in the vehicle lateral direction (X direction) of the control device 40. 40 is further cooled, collides with the inner wall surface of the motor case 31D on the rear side of the vehicle, travels downward, flows around the motor 19, and wraps around the side surface of the motor 19 in the vehicle left-right direction (X direction). It moves to the downstream side of the fan 20A for motor cooling, and is blown out from the air discharge opening 33D to the negative pressure region (the front side region of the blade 11) of the blower 10, and from the air discharge opening 34D to the rear region of the blower 10. Discharged.

  The motor case 31D may be formed of a resin molded member. In this case, the motor case 31D is made of a polypropylene resin whose strength is increased by glass fiber or talc material. Further, the motor case 31D may be configured and assembled by a separate component from the fan shroud 30.

  As described above, in the cooling device according to the present embodiment, the air sucked into the motor case 31D by the motor cooling fan 20A is formed as a small opening on one side surface of the motor case 31D. 32D flows into the motor case 31D and flows around the control device 40, and then flows around the motor installation space 37 by the partition wall 35 that partitions the motor installation space 37 and the control device installation space 36. The air passes through the motor 19 and is discharged from the air discharge opening 33D and the air discharge opening 34D to the outside of the motor case 31D.

  According to this configuration, since the air introduction opening 32D is formed so as to open to a part of one side surface of the motor case 31D, the passing air speed of the cooling air given to the control device 40 is improved, and the cooling effect is further enhanced. Can be increased. Further, since the control device 40 is arranged on the upstream side of the cooling air from the motor 19, the control device 40 can be preferentially cooled over the motor 19.

(Fifth embodiment)
In the fifth embodiment, as another form of the cooling device according to the present invention, a configuration in which the rotating shaft 18 of the motor cooling fan 20A and the rotating shaft 17a of the motor directly connected to the motor 19 are connected by the joint member 50 is used. A cooling device provided will be described with reference to FIG. FIG. 10 is a schematic cross-sectional view of the cooling device according to the present embodiment when viewed from above. In FIG. 10, the X direction indicates one direction of the left and right width direction (vehicle left-right direction) of the cooling device, and the Y direction indicates the front direction of the cooling device (vehicle forward direction).

  As shown in FIG. 10, the cooling device of the present embodiment is configured such that the rotating shaft 18 of the motor cooling fan 20 </ b> A and the rotating shaft 17 a of the motor are connected by a joint member 50 to the cooling device of the second example of the second embodiment. The point which has the structure to connect differs. Other configurations are the same as those of the cooling device of the second example, and the operational effects associated with the configurations denoted by the same reference numerals are the same as those of the second example.

  The joint member 50 may be a member that joints two shafts arranged coaxially with each other, and is not limited to one form. In the joint member 50, for example, a motor side gear fixed to the motor rotating shaft 17 a side and a fan side gear fixed to the rotating shaft 18 side of the motor cooling blower mesh with each other so that two shafts are jointed. Can be adopted.

  In the present embodiment, the shaft 17b to which the first main driving side gear 15 and the second main driving side gear 16 are fixed, the rotating shaft 18 of the motor cooling fan, and the rotating shaft 17a of the motor are provided coaxially. ing.

(Sixth embodiment)
In the sixth embodiment, as another embodiment of the cooling device according to the present invention, a cooling device in which the joint member 50 described in the fifth embodiment is formed integrally with the blade boss portion 22C of the motor cooling fan 20C will be described with reference to FIG. Description will be made with reference to FIG. FIG. 11 is a partial side sectional view showing a configuration in which the blade boss portion 22C and the joint member 60 of the motor cooling fan 20C are integrated. 12 is a front view showing an external gear member 61 constituting the joint member 60 in FIG. 13 is a partial side sectional view of the cut surface shown in FIG. 12 when viewed in the XIII direction. FIG. 14 is a front view showing the internal gear member 65 in FIG. FIG. 15 is a partial cross-sectional view of the cut surface shown in FIG. 14 when viewed in the XIV direction. 11, FIG. 13 and FIG. 15, the X direction indicates one direction of the cooling device in the left-right width direction (vehicle left-right direction), and the Y direction indicates the front direction of the cooling device (vehicle forward direction).

  As shown in FIG. 11, the blade boss portion 22 </ b> C of the motor cooling fan 20 </ b> C is arranged on the side close to the rotation shaft 18 and has an outer gear member 61 having the rotation shaft 18 at the center and an outer side of the outer gear member 61. An internal gear member 65 meshing with the gear member 61 is assembled and formed. That is, the state in which the external gear member 61 and the internal gear member 65 are integrated constitutes the blade boss portion 22C.

  As shown in FIGS. 12 and 13, the external gear member 61 includes a disk portion 62 in which the end portion of the rotation shaft 17 a of the motor is integrally coupled at the center portion, and an outer periphery in the radial direction on the outer periphery of the disk portion 62. And a plurality of external teeth 63 (eight external teeth 63 in the present embodiment) arranged at regular intervals.

  On the other hand, as shown in FIGS. 14 and 15, the internal gear member 65 is integrally formed at the center of the end portion of the shaft 17 b to which the first main driving side gear 15 and the second main driving side gear 16 are fixed. The combined annular portion 68 and a plurality of internal teeth 67 (eight internal teeth in this embodiment) projecting radially inwardly on the inner peripheral surface of the annular portion 68 and arranged at equal intervals. 67) and a plurality of blades 21C arranged on the outer peripheral surface of the annular portion 68. The internal tooth portion 67 is disposed in the annular portion 68 so as to correspond to a position in contact with the outer peripheral surface of the portion where the external tooth portion 63 of the disk portion 62 is not provided. The external tooth portion 63 is a disk portion. In 62, it arrange | positions corresponding to the position which contacts the internal peripheral surface 66 of the site | part in which the internal tooth part 67 of the annular part 68 is not provided.

  The joint member 60 configured as described above is created as an integrally molded resin molded member integrated with a fan member including the blade boss portion 22C of the motor cooling fan 20C, and is formed by injection molding using a predetermined mold. Molded. The joint member 60 is made of, for example, polypropylene resin, nylon resin, or the like whose strength is increased by glass fiber or talc material.

  The configuration of the present embodiment can be applied to any of the cooling devices of the first to fifth embodiments.

  As described above, the cooling device of the present embodiment includes the joint member 60 that coaxially connects the shaft 17b connected to the rotating shaft 13 of the blower via the gear and the drive shaft 17 of the motor. The joint member 60 is formed integrally with the fan members (blade boss portion 22C and blade 21C) of the motor cooling fan 20C.

  According to this configuration, the size of the cooling device in the motor drive shaft direction can be reduced, so that the shaft misalignment between the jointed shafts can be reduced, and the size of the device can be reduced. In addition, the number of parts and assembly man-hours can be reduced. Further, by creating the blade boss portion 22C of the motor cooling fan 20C and the joint member 60 by integral molding, the installation space can be saved and the cost can be reduced.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the above embodiment, the fan shroud 30 is formed of a resin molded product, but may be made of metal. When it is made of metal, the fan shroud 30 is created by press working or welding using a mold.

  In the above embodiment, the motor cooling fans 20, 20 </ b> A, 20 </ b> B, and 20 </ b> C are provided on the downstream side of the motor 19, but may be provided on the upstream side of the motor 19.

  Moreover, in the said embodiment, although the two air blowers 10 are attached to the fan shroud 30, it is not restricted to this, It is good also as a structure which attaches 1 or 3 or more air blowers.

  Moreover, in the said embodiment, although the air blower 10 is a structure provided with one fan in the front-back direction, a double inversion fan can also be employ | adopted as the air blower 10. This double reversing fan is excellent in fan efficiency, and has a configuration in which two rotating shafts of a fan rotating in opposite directions are connected to a motor driving shaft 17 via a gear. These fans are arranged so that the rotational axis direction is the front-rear direction and the front-rear direction.

  Further, as a method for connecting the fan shroud 30 and the radiator 1, a fastening method using a clip or a fastening method using a bracket can be adopted in addition to a screwing means such as a mounting screw.

It is a schematic sectional drawing when the cooling device concerning a 1st embodiment of the present invention is seen from the upper surface. It is a schematic sectional drawing when the 1st example of the cooling device concerning a 2nd embodiment is seen from the upper surface. It is a schematic sectional drawing when the 2nd example of the cooling device concerning a 2nd embodiment is seen from the upper surface. It is a schematic sectional drawing when the 3rd example of the cooling device concerning a 2nd embodiment is seen from the upper surface. It is a schematic side view when the motor of the cooling device concerning a 2nd embodiment is seen from the side. It is a schematic sectional drawing when the cooling device concerning a 3rd embodiment is seen from the upper surface. It is a schematic sectional drawing when the cooling device concerning a 4th embodiment is seen from the upper surface. It is the schematic side view which showed the inside when the motor of the same cooling device is seen from the side. It is the schematic side view which showed the inside when the motor of the cooling device is seen from the back. It is a schematic sectional drawing when the cooling device concerning a 5th embodiment is seen from the upper surface. It is a partial sectional side view which shows the structure with which the blade | wing boss | hub part and joint member of the fan for motor cooling were integrated about the cooling device which concerns on 6th Embodiment. It is a front view which shows the external gear member which comprises a coupling member in FIG. It is a partial sectional side view at the time of seeing in the XIII direction about the cut surface shown in FIG. It is a front view which shows the internal gear member in FIG. It is a partial sectional side view at the time of seeing the cut surface shown in FIG. 14 in the XV direction.

Explanation of symbols

1. Radiator (heat exchanger)
DESCRIPTION OF SYMBOLS 2 ... Core part 10 ... Air blower 11 ... Blade | wing 13 ... Rotary shaft of an air blower 14 ... Driven side gear (gear)
15 ... 1st main drive side gear (gear)
16: Second driving gear (gear)
DESCRIPTION OF SYMBOLS 17 ... Motor drive shaft 17a ... Motor rotation shaft 17b ... Shaft 18 ... Rotation shaft 19 ... Motor 20, 20A, 20C ... Motor cooling fan 22C ... Blade boss part 30 ... Fan shroud 32A, 32D ... Air introduction opening part 31A , 31D ... Motor case 33B, 34C ... Air discharge opening 35 ... Partition wall 36 ... Control device installation space 37 ... Motor installation space 40 ... Control device 60 ... Joint member

Claims (7)

A blower (10) disposed opposite to the rear side surface of the core part (2), which is a heat exchange part of the heat exchanger (1), and supplying cooling air to the core part (2);
A fan shroud disposed behind the core part (2) so as to cover the outer periphery of the blower (10) and guiding the cooling air that has passed through the core part (2) to the rear of the blower (10) (30),
A motor (19) for rotationally driving the rotating shaft (13) of the blower;
A drive shaft (17) of the motor that extends parallel to the rear of the core portion (2) and is connected to a rotating shaft (13) of the blower via gears (14, 15, 16);
The motor cooling fan (20) for providing cooling air to the motor (19);
With
A rotating shaft (18) which is provided coaxially with the drive shaft (17) of the motor and rotates integrally;
When the drive shaft (17) of the motor is rotated, the motor cooling fan (20) rotates the rotating shaft (18) to supply cooling air to the motor (19), and the fan ( 10) A cooling device characterized in that the rotating shaft (13) of the blower is rotated via the gears (14, 15, 16) to supply cooling air to the core part (2). The drive shaft (17) of the motor is directly connected to the shaft (17b) coupled to the rotating shaft (13) of the blower via the gears (14, 15, 16) and the motor (19). It consists of a motor rotation shaft (17a),
The rotation shaft (17a) of the motor and the shaft (17b) are connected to be coaxial by a joint member (60),
The said coupling member (60) is integrally formed in the blade | wing boss | hub part (22C) containing the said rotating shaft (18) of the said air blower for motor cooling (20C), The cooling of Claim 1 characterized by the above-mentioned. apparatus.   An air discharge opening (33B) that communicates between the blowout side of the fan for cooling the motor (20) and the negative pressure region of the fan (10) and opens forward of the blade (11) of the fan (10). The cooling device according to claim 1, wherein the cooling device is provided.   The cooling device according to claim 3, further comprising an air discharge opening (34C) that communicates a blowing side of the motor cooling fan (20A) and a blowing side region of the blower (10).   The cooling device according to any one of claims 1 to 4, wherein the motor cooling fan (20) includes a centrifugal fan. The motor (19) is connected to the end of the drive shaft (17) of the motor and is disposed in the motor case (31A) together with the motor cooling fan (20A) immediately after the heat exchanger (1). And
The motor case (31A) is formed with an air introduction opening (32A) for sucking external air at an outer peripheral edge portion of a side surface on the opposite side of the drive shaft (17) of the motor. The cooling device according to any one of 1 to 5. The motor (19) is provided in a motor case (31D) together with the motor cooling fan (20A) and the control device (40) for controlling the motor cooling fan (20A),
The motor case (31D) is a partition that partitions and forms a motor installation space (37) in which the motor (19) is disposed and a control device installation space (36) in which the control device (40) is disposed. A wall (35) and an air introduction opening (32D) formed in the motor case (31D);
External air sucked into the motor case (31D) by the motor cooling fan (20A) is sucked from the air introduction opening (32D), and the control device (40) is installed in the control device installation space (36). ) Is cooled, then flows into the motor installation space (37) to cool the motor (19), and is discharged to the outside of the motor case (31D). A cooling device according to claim 1.

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