JP2010185370A - Vehicular radiator unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiator unit capable of controlling flow rate of outside air passing through a radiator with a simple structure and easy to be mounted to an existing vehicle. <P>SOLUTION: A blast blade 14 of a cooling fan 11 is arranged behind the radiator 8 arranged at the front part in an engine room 1, and support shafts 14a, 14b provided to project from inner/outer peripheries of the blast blade 14 are rotatably supported by a groove part 13e and a hole part 13f of a support frame 13. When the cooling fan 11 rotates, the respective blast blades 14 perform opening movement by lift force, and when the cooling fan 11 stops, the blades 14 perform closing movement by energization force of a pressing plate spring 15 so as to limit the flow rate of the outside air passing through the radiator 8, which prevents supercooling of cooling water and an engine. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radiator unit for a vehicle in which a blower blade provided in a cooling fan is movable and is opened and closed in conjunction with the operation of the cooling fan.

  As is well known, the cooling system in which the cooling water that keeps the engine temperature substantially constant circulates has a cooling water main passage and a cooling water sub-passage that bypasses the cooling water main passage. A radiator disposed in the front part of the engine communicates with the cooling water main passage, and the cooling water circulating in the cooling water main passage is cooled by outside air passing through the radiator when circulating through the radiator. The In addition, when the engine is cold, the cooling water main passage is shut off and most of the cooling water is circulated through the cooling water sub passage to prevent overcooling of the engine.

  However, since the traveling wind flows into the engine room through the radiator during traveling, the traveling air cools the engine more than necessary. For this reason, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 7-11954), a shutter mechanism that is electrically operated via an actuator is disposed behind the radiator, and when the cooling water temperature is lower than the set temperature, A technology is disclosed in which the shutter mechanism is closed to stop the traveling wind passing through the radiator and to prevent the traveling wind from flowing to the engine side.

  However, since the technique disclosed in the above-described document is a structure that operates the shutter mechanism using the cooling water temperature as a parameter, a link mechanism that mechanically operates the shutter mechanism is required, and a dedicated mechanism that operates the shutter mechanism is also required. An actuator and electrical wiring for supplying power to the actuator are also required. Therefore, there is a problem that the structure becomes complicated and the vehicle cost increases due to an increase in the number of parts, and the weight increases.

  Furthermore, in order to arrange this shutter mechanism, it is necessary to secure a dedicated space between the radiator and the cooling fan. Therefore, the radiator must be relatively moved to the front part of the vehicle body. There is also a problem that it is difficult to easily attach to a vehicle and lacks versatility.

  In view of the above circumstances, an object of the present invention is to provide a vehicle radiator unit that has a simple structure, is inexpensive in product cost, and can be easily attached to an existing vehicle and has excellent versatility.

  In order to achieve the above object, the present invention includes a radiator disposed at a front portion in an engine room, and a cooling fan that controls a flow rate of outside air passing through the radiator, and is provided in the cooling fan. In the vehicle radiator unit in which a plurality of blower blades are arranged around the outer periphery of the rotation shaft, each of the blower blades is supported rotatably about an axis in the normal direction of the rotation shaft, Each blower blade is in a closed state when the cooling fan is stopped, and is opened by a lift generated by the rotation of the cooling fan.

  According to the present invention, the blower blades provided in the cooling fan are movable, and are kept closed when the cooling fan is stopped, and are generated by this rotation when the cooling fan is rotated. Since the open state is achieved by the lifting force, a mechanism for positively opening and closing the blower blade is not required, and a simple structure can be manufactured at a low product cost. Further, since the structure is such that the blower blade itself is operated, it can be easily attached to an existing vehicle simply by replacing the blower blade or the like, and high versatility can be obtained.

Schematic cross-sectional side view showing the front of the vehicle Cross-sectional side view of radiator unit Disassembled perspective view of radiator unit The cooling fan fan blades are shown, (a) is a plan view, (b) is a front view, and (c) is a bottom view. Enlarged side view of the main part of the cooling fan Perspective view of main part of cooling fan VII-VII sectional view of FIG. 5 in a state in which one blower blade is arranged on the support frame. 7 is an enlarged view of the main part of FIG. IX arrow view of FIG. XX sectional view of FIG. (A) is a schematic plan view of a radiator and a cooling fan, (b) is a characteristic diagram showing the wind pressure applied to the blower blades.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 in FIG. 1 denotes an engine room of a vehicle, and a front grill 2 is provided at a front portion in the engine room 1. A front hood 3 that opens and closes the upper portion of the engine room 1 is faced to the upper portion of the front grill 2, and a front bumper 5 is disposed at the lower portion.

  Further, a radiator panel 7 of the radiator unit 6 is disposed behind the front grill 2. The radiator panel 7 is formed in a substantially rectangular frame shape, and extends in the vehicle width direction in a state of being opposed to each other in the vertical direction, and both ends of the upper frame 7a and the lower frame 7b. It has a pair of left and right side frames 7c connecting the parts.

  Although not shown, the upper frame 7a and the lower frame 7b between the side frames 7c are connected by a center frame. Further, both ends of the upper frame 7a and the lower frame 7b of the radiator panel 7 are connected to a vehicle body frame (not shown). The front grill 2 and the front bumper 5 are also fixed to the vehicle body frame.

  A radiator 8 is provided in the rear of the radiator panel 7, and the bottom surface of the radiator 8 is fixed to a lower bracket 8 a extending from the lower frame 7 b of the radiator panel 7, and the upper surface is upper to the upper frame 7 a. It is fixed via a bracket 8b. The radiator 8 is provided in a cooling water passage through which cooling water for cooling an engine (not shown) disposed behind the radiator 8 circulates. When the cooling water passes through the radiator 8, The heat received from the engine is dissipated and cooled.

  An opening end of the shroud 10 is attached to the rear portion of the radiator 8. The shroud 10 forms an exhaust passage behind the radiator 8, and two wind tunnel portions 10a and 10b are formed side by side and at a predetermined interval. A motor fixing portion 10c is fixed to the center of the wind tunnel portions 10a and 10b via a support frame 10d extending from the inner periphery of each of the wind tunnel portions 10a and 10b toward the center.

  A cooling fan 11 is accommodated in each of the wind tunnel portions 10a and 10b. Since each of the cooling fans 11 has the same structure, the configuration of only one cooling fan will be described below.

  As shown in FIG. 3, the cooling fan 11 includes a fan motor 12, a support frame 13, a blower blade 14, a presser plate spring 15 as a presser spring, and a nut 16. The fan motor 12 is fixed to a motor fixing portion 10c disposed in the center of the wind tunnel portions 10a and 10b, and a rotating shaft 12a protruding from the fan motor 12 is connected to a hub 13a provided on the support frame 13. A rotation shaft hole 13b formed at the center is inserted. A screw is screwed at the tip of the rotating shaft 12a.

  The support frame 13 is an integrally molded product made of resin or the like, and a ring-shaped outer frame 13c is formed on the outer periphery. The outer frame 13c and the hub 13a are radially outward from the hub 13a and the like. The support frames 13d are connected via a plurality of (five in this embodiment) support frames 13d extending at intervals. Further, as shown in FIG. 2, a predetermined gap is secured between the outer periphery of the outer frame 13c and the inner periphery of the wind tunnel portions 10a and 10b, and the support frame 13 is allowed to rotate.

  In addition, a plurality of (five in the present embodiment) blower blades 14 are arranged at equal intervals between the hub 13 a and the outer frame 13 c of the support frame 13. The air blowing blades 14 have the same fan shape, and when the air blowing blades 14 are arranged at equal intervals on the inner periphery of the air channel portions 10a and 10b, the air wind blade portions 10a and 10b are formed by the air blowing blades 14. Blocked. The cooling fan 11 according to the present embodiment is set to rotate in the clockwise direction when viewed from the front as indicated by an arrow in FIG. 3. The end in the direction is called the rear end.

  As shown in FIG. 3, cylindrical support shafts 14 a and 14 b protrude from the inner periphery and the outer periphery of each blower blade 14. Further, a bent portion 14c bent forward is formed on the tip end side of the blower blade 14. The support shafts 14a and 14b are arranged at the same position on the normal line of the hub 13a. As shown in FIG. 4B, both the support shafts 14a and 14b are arranged in a vertical state. In this case, the support shafts 14a and 14b are provided at approximately 2/3 of the entire width from the tip side. Further, as shown in FIGS. 4A and 4B, a step t is formed in the front-rear direction between the front end side and the rear end side with the support shafts 14a and 14b as a boundary. This level difference t is equal to the plate thickness of the blower blade 14, and therefore the rear surface on the front end side and the front surface on the rear end side are the same surface.

  The hub 13a and the outer frame 13c are formed with a groove portion 13e and a hole portion 13f that are supported by the support shafts 14a and 14b so as to be rotatable. As shown in FIG. 5, when the support shaft 14b protruding from the outer periphery of each blower blade 14 is attached to the hole 13f, and the support shaft 14a protruding from the inner periphery is attached to the groove 13e. The air blowing blade 14 is movable in the front-rear direction around the support shafts 14a and 14b. The groove 13e is opened in the front surface of the hub 13a, and as shown in FIG. 9, the depth (vertical direction in FIG. 9) is set to be substantially the same as the diameter of the support shaft 14a. Therefore, when the support shaft 14a is attached to the groove portion 13e, the side surface thereof is substantially at the same position as the front surface of the hub 13a.

  A presser leaf spring 15 is attached to the front surface of the hub 13a. As shown in FIGS. 2 and 8, the presser leaf spring 15 is formed in a disk shape having a relatively thin plate thickness, and a stop hole portion 15 a attached to the rotating shaft 12 a of the fan motor 12 is formed at the center. Is formed. The outer diameter of the presser leaf spring 15 is formed to be the same as or slightly smaller than the outer diameter of the hub 13a, and the same number of pressers as the number of the blowing blades 14 (five in this embodiment) are provided on the outer periphery thereof. The pieces 15b are formed at equal intervals. Further, a nut 16 is screwed into the rotating shaft 12a protruding from the retaining hole 15a of the holding plate spring 15 attached to the front surface of the hub 13a, and the hub 13a is interposed between the nut 16 and the base of the rotating shaft 12a. And the presser leaf spring 15 is clamped. As shown in FIG. 8, the presser leaf spring 15 is fixed in a state where the presser piece 15 b faces the support frame 13 d of the support frame 13.

  Next, the operation of the present embodiment having such a configuration will be described. The radiator unit 6 is integrally assembled outside and then attached to the radiator panel 7. Therefore, first, the assembly procedure of the radiator unit 6 will be described.

  When assembling the radiator unit 6, the fan motor 12 is placed on an unillustrated assembly table and the rotating shaft 12a is vertically suspended (just rotating the fan motor 12 shown in FIG. 4 by 90 ° clockwise). State). Next, the rotary shaft hole 13 b drilled in the center of the hub 13 a of the support frame 13 is inserted into the rotary shaft 12 a.

  Thereafter, a large number (five in this embodiment) of air blowing blades 14 are attached to the support frame 13. Each of the blower blades 14 is arranged in a circular shape between the hub 13a and the outer frame 13c, and a support shaft 14a protruding from the outer periphery of each of the blower blades 14 is formed in the outer frame 13c. The support shaft 14b, which is inserted through the hole 13f and projecting from the inner periphery, is attached to the groove 13e formed on the outer periphery of the hub 13a. At that time, as shown in FIG. 6, the blower blade 14 is provided with a bent portion 14 c in the rotation direction, and the rear end of the blower blade 14 is connected to the rear surface of the bent portion 14 c of the adjacent blower blade 14. Superimpose. As shown in FIGS. 4A and 4B, a step t corresponding to the plate thickness of the blower blade 14 is formed on the front end side and the rear end side of the blower blade 14. The blades 14 are arranged in a circular shape in a substantially flat state.

  Next, the rotary shaft 12a protruding from the rotary shaft hole 13b of the hub 13a is inserted through the stop hole portion 15a drilled in the center of the presser plate spring 15, and further protruded from the stop hole portion 15a. A nut 16 is screwed into a screw threaded at the tip of the rotating shaft 12a.

  Then, with the nut 16 screwed into the tip of the rotating shaft 12a, the presser plate spring 15 is rotated so that the presser piece 15b faces the support frame 13d of the support frame 13 (see FIG. 8). Next, the nut 16 is finally tightened to fix the hub 13 a and the presser leaf spring 15.

  Then, as shown in FIGS. 6 and 11 (a), the back surface of the blower blade 14 is lightly pressed against the support frame 13d by the holding piece 15b of the holding plate spring 15. As shown in FIG. 7, the support frame 13d is disposed in the rotational direction (clockwise direction in the figure) with respect to the support shaft 14b, and the rearward rotation of the distal end side is restricted by the support frame 13d. . Accordingly, the support frame 13d has a function as a stopper that holds the closed state of each blower blade 14. Further, since the depth of the groove portion 13e is formed to be substantially the same as the shaft diameter of the support shaft 14a, the support shaft 14a is prevented from coming off while being allowed to rotate.

  And the fan motor 12 of the cooling fan 11 assembled in this way is fixed to the motor fixing | fixed part 10c of the shroud 10 (refer FIG. 5). Then, the support frame 13 is accommodated in the wind tunnel portions 10a and 10b formed in the shroud 10 (see FIG. 2). Next, the shroud 10 is attached to the back surface of the radiator 8 (see FIG. 3) to complete the radiator unit 6.

  Then, as shown in FIG. 2, the back surface of the radiator 8 is surrounded by the shroud 10, and a wind tunnel path through which the outside air passing through the radiator 8 is guided to the wind tunnel portions 10 a and 10 b is formed on the back surface of the radiator 8. . Then, as shown in FIG. 1, the radiator unit 6 assembled in a predetermined manner is fixed to the radiator panel 7 disposed in the front portion of the engine room 1 through the lower frame 7 b and the upper frame 7 a. Connect the cooling water hose and the like to complete the assembly of the cooling system.

  Next, the operation of the blower blade 14 will be described. When the fan motor 12 is not rotating and the vehicle is stopped, such as during warm-up operation, outside air does not flow from the front grill 2 through the radiator 8 to the shroud 10 side. It is sandwiched between a presser piece 15 b protruding from the outer periphery of the spring 15 and a support frame 13 d formed on the support frame 13. Therefore, the closed state of the wind tunnel portions 10 a and 10 b of the shroud 10 is maintained by the air blowing blades 14.

  On the other hand, in a state where the cooling water temperature of the stopped engine is likely to be high, such as idling for a long time, when the cooling water temperature becomes high, the fan motor 12 is turned on and the support frame 13 rotates clockwise in front view. Each blower blade 14 supported by the support frame 13 rotates. Then, outside air enters between the rear surface of the bent portion 14c on the front end side of the blower blade 14 and the rear end of the other blower blade 14 facing the rear surface, and this external airflow causes the front end side of the blower blade 14 to enter. Lift is generated. As a result, the blower blade 14 functions as a blower fan with the bent portion 14c side inclined forward and the rear end side inclined rearward with the support shafts 14a and 1b as the center. The rotational angle of the blower blade 14 in the front-rear direction is determined by the lift force acting on the tip and the urging force from the presser plate spring 15 on which the presser piece 15b that presses the blower blade 14 in the closing direction is formed. It is determined by the balance with the traveling wind pressure received by the blower blades 14.

  As a result, each blower blade 14 opens obliquely with respect to the rotational direction (a state indicated by a one-dot chain line in FIG. 11A), and sucks outside air from the front grill 2 side. Then, the outside air sucked by the cooling fan 11 passes through the front grill 2 and passes through the radiator 8. At this time, the heat of the cooling water radiated from the radiator 8 is absorbed, and the heated outside air passes through the blower blades 14. Drain backward.

  As described above, since each blower blade 14 is opened and closed in conjunction with the operation of the fan motor 12, a mechanism for actively opening and closing the blower blade 14 is not required, and the structure can be simplified. When the cooling water temperature is lowered to a predetermined temperature and the fan motor 12 is turned off, the blower blade 14 is returned to the initial position by the urging force from the presser plate spring 15 that protrudes the presser piece 15b, and the wind tunnel portion 10a. 10b is closed.

  On the other hand, when the cooling water temperature becomes equal to or higher than the set temperature during running and the fan motor 12 is turned on, each blower blade 14 resists the urging force from the presser piece 15b as described above, and is shown by a one-dot chain line in FIG. Inclined as shown by, and the traveling wind is sucked. As a result, the flow rate of the traveling wind (outside air) flowing through the radiator 8 increases, and the cooling water flowing through the radiator 8 is efficiently cooled.

  Further, when the outside air temperature is low and the cooling water temperature does not reach the set temperature during running in a cold district or the like, the fan motor 12 is in the OFF state. At that time, since the air is blown through the radiator 8 through the radiator 8, the movable parts such as the support shafts 14a and 14b of the air blowing blade 14 are difficult to freeze, and even in an extremely cold state, the fan When the motor 12 rotates, it can be opened smoothly.

  Further, each of the blower blades 14 is driven by wind that is blown on the front surface, and the wind pressure is about to rotate in the counterclockwise direction of FIG. 11 (a) on the front end side around the support shaft 14b (14a). On the other hand, wind pressure is applied to the rear end side to rotate in the clockwise direction in FIG. However, since the support shafts 14a and 14b according to the present embodiment are located at about 3/2 of the entire width from the front end side, as shown in FIG. 11B, the moment applied to the front end side is on the rear end side. Therefore, the air blowing blade 14 that has received the traveling wind can reliably shield the wind tunnel portions 10a and 10b.

  As a result, when the cooling water temperature is low and the fan motor 12 is OFF, the wind tunnel formed by the shroud 10 behind the radiator 8 is closed, so that the amount of traveling wind (outside air) passing through the radiator 8 is limited. In addition to effectively preventing the cooling water from being overcooled, the flow rate of the outside air flowing to the engine side is limited, so that the engine can be prevented from being overcooled.

  Thus, according to this embodiment, since each ventilation blade 14 arrange | positioned by wind tunnel part 10a, 10b was opened and closed by operation | movement of the cooling fan 11, this each ventilation blade 14 is positively opened. An actuator, a link mechanism, and a control device for driving are unnecessary, the structure is simplified, and the product cost can be reduced. In addition, since the blower blade 14 itself is operated, it is not necessary to provide a shutter mechanism specially behind the radiator, and therefore, it is not necessary to secure a dedicated space for the shutter mechanism, and even for an existing cooling system, Instead of the conventional shroud and cooling fan, the shroud 10 and cooling fan 11 of this embodiment can be applied, and high versatility can be obtained.

  Furthermore, when assembling, it is not necessary to assemble electrical wiring or a link mechanism, so that the number of assembling steps can be reduced.

  In addition, this invention is not restricted to embodiment mentioned above, For example, the number of the ventilation blades 14 arrange | positioned by the support frame 13 in the shape of a circle may be less than four pieces, or may be six pieces or more. . For example, in the case where a condenser of an air conditioner is disposed in front of the radiator and a cooling fan is interposed between the condenser and the radiator, the cooling fan of this embodiment is used instead of the cooling fan. 11 can be applied. Furthermore, the cooling fan 11 may be disposed in front of the radiator. The cooling fan 11 may be of an engine drive type. In this case, ON / OFF of the cooling fan 11 is controlled by a teleconference clutch.

  Further, the support shaft 14a may be provided on the outer periphery of the hub 13a. In this case, the groove 13e is formed on the inner peripheral side of the blower blade 14. Similarly, the support shaft 14b may protrude from the inner periphery of the outer frame 13c. In this case, the hole 13f is formed on the outer periphery side of the blower blades 14.

1 ... engine room,
6 ... Radiator unit,
7 ... Radiator panel,
8 ... Radiator,
10 ... shroud,
10a, 10b ... wind tunnel,
10c: motor fixing part,
10d, 13d ... support frame,
11 ... Cooling fan,
12 ... Fan motor,
12a ... rotating shaft,
13 ... Support frame,
13a ... Hub,
13c ... outer frame,
13e ... the groove,
13f ... hole,
14 ...
14a, 14b ... support shafts,
15: Presser leaf spring,
15b ... Presser piece t ... Step

JP 7-11354 A

Claims (7)

A radiator disposed at a front portion in the engine room, and a cooling fan that controls a flow rate of outside air passing through the radiator, and a plurality of air blowers are disposed on an outer periphery of a rotating shaft provided in the cooling fan. In the vehicle radiator unit in which the blades are arranged in a circular shape,
Each of the blower blades is supported so as to be rotatable about an axis in the normal direction of the rotation shaft,
Each of the blower blades is in a closed state when the cooling fan is stopped, and is opened by lift generated by rotation of the cooling fan. Each of the blower blades is supported by a support frame attached to the rotating shaft,
The vehicle radiator unit according to claim 1, wherein the frame is provided with a stopper that holds a closed state of each of the air blowing blades. Each of the blower blades is provided between a hub formed on the rotation center side of the support frame and a frame formed on the outer periphery.
A groove is formed on one of the hub and the inner periphery of each of the air blowing blades, and a support shaft supported by the groove is projected on the other.
The vehicle radiator according to claim 2, wherein a hole is formed in one of the outer frame and the outer periphery of each of the blower blades, and a support shaft supported by the hole is projected from the other. unit. The radiator unit for a vehicle according to any one of claims 1 to 3, wherein each of the blower blades is pressed by a presser spring to maintain a closed state. 4. The vehicle radiator according to claim 3, wherein each of the air blowing blades is pressed by a presser spring fixed to the hub to maintain a closed state, and the groove portion is closed by the presser spring. unit. The radiator unit for a vehicle according to any one of claims 1 to 5, wherein the cooling fan is disposed behind the radiator. The radiator unit for a vehicle according to any one of claims 1 to 5, wherein the cooling fan is disposed in front of the radiator.

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