JP2011126328A - Cooling device for engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device for an engine having a structure in which a cooling member of the engine is integrally mounted to a radiator frame and is attached only to a chassis frame side for disconnecting with a vehicle body side, facilitating the assembly work, and reducing the weight. <P>SOLUTION: A radiator 7, an intercooler 10, a fan, a fan shroud 9, a fan drive mechanism, a drive mechanism support stay, and the like are integrally attached to a radiator frame 6 to form a component. The cooling device for the engine is disposed to be approximately parallel to a chassis frame and is attached to the chassis frame via the radiator frame 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an engine cooling device mounting structure for cooling engine cooling water mounted on a rear engine bus or the like.

The engine room located at the rear of the rear engine bus body has an engine, a radiator that cools the engine coolant, a fan that forcibly ventilates the cooling fins of the radiator to promote heat exchange, and an intake air that supercharges the engine Important devices for driving a vehicle (bus) such as an intercooler and a transmission for cooling the vehicle are concentrated. Further, the outer periphery of the engine room is sound-insulated by the vehicle body wall in order to prevent the operating noise of the engine and other devices from directly leaking outside the vehicle. Therefore, it is necessary for the radiator and the intercooler to prevent hot air blown from the radiator from being sucked (returned) into the radiator and the intercooler again.
For this reason, a so-called radiator shroud is installed across the vehicle body side and chassis frame side to prevent hot air from rewinding in the engine room by arranging a shielding plate around the outer periphery of the radiator on the intake upstream side of the radiator. ing.
Therefore, the radiator mounting structure and the radiator shroud structure are complicated, and much time is required for assembly work.

FIG. 6 shows the rear side of the engine room portion of the current rear engine bus (hereinafter, the left and right standards are described as front, rear, left and right in the state of being seated in the driver's seat), and the side wall of the vehicle body is omitted.
100 is an intercooler, 105 is fixed to the engine room 99 at one end on the outer side of the right chassis frame of a pair of left and right chassis frames (not shown) spaced in the vehicle longitudinal direction and in the vehicle width direction. A radiator support extending outward. A rear engine bus engine (not shown) is mounted between the left and right chassis frames in the vehicle width direction.
The other end of the radiator support 105 is fastened to a bracket 110 fixed to the lower frame 104 of the vehicle body 111. 106 and 107 are arranged in the vertical direction of the vehicle body 111, and the lower end portions thereof are fixed to the lower frame 104, and the intermediate portions thereof are fixed to the floor frame 112 disposed substantially parallel to the lower frame 104. These are vehicle body pillars A and B constituting a part.
Reference numeral 102 denotes a fan shroud 103 and a radiator frame that rotatably supports a radiator fan (not shown) in the fan shroud 103 with a space from the inner peripheral surface of the fan shroud 103.

  The intake upstream side of the intercooler 100 (the front side of the intercooler 100) and the radiator shroud A109 to block the hot air from the engine room 99 inward along the outer peripheral portion of the intercooler 100, is connected to the front edge of the radiator shroud A109, a radiator shroud C113 that binds to the outer wall of the body 111 (not shown), the lower edge of the intercooler 100, connects the lower edge and a radiator shroud C113 radiator shroud A109 joined to the body-side lid 30 of the body 111 the lower shields the radiator shroud B 108, the upper edge of the intercooler 100, the upper edge of the upper edge and the radiator shroud C113 radiator shrouds a 109, and the engine Le top joined to the body-side lid 30 of the vehicle body 111 It consists out with radiator shroud B to shield (not shown) from the arm 3, the intake system upstream of the intercooler 100 is disposed so as to surround a plurality of radiator shroud. Intake air is taken in through an intake hole opened in the side wall of the vehicle body 111 surrounded by the vehicle body pillars A 106 and B 107, the lower frame 104 and the floor frame 112. The plurality of radiator shrouds are attached to the vehicle body 111 and the chassis frame.

  However, the bus is assembled in the order in which the chassis frame side is assembled and the vehicle body side is covered thereon. First, the radiator 101 and the fan support (including the fan shroud 103 and the fan) are attached to the radiator frame 102 and the radiator support 105 fixed to the chassis frame side. Next, the vehicle body side is placed so as to cover the vehicle body from above, the radiator support bracket 110 fixed to the vehicle body side lower frame 104, the other end of the radiator support 105, a plurality of radiator shrouds, and the vehicle body side wall. It is the structure which fastens.

  Since the mounting portion has a structure in which the vehicle body side 111 and the chassis frame side are separately fastened by assembly bolts, the mounting holes between the radiator support bracket 110 and the other end of the radiator support 105 are difficult to match due to manufacturing errors, and it is difficult to assemble. To do. Further, there are problems such as misalignment of joints between the intercooler 100 and the plurality of shrouds.

In addition, a seal rubber is used to shield between the radiator shroud and the vehicle body, and an error between the vehicle body and the chassis frame is absorbed to absorb hot air rewinding from the engine room 3 to the radiator.
As a prior art document, Japanese Patent Laid-Open No. 11-36866 (Patent Document 1) has been proposed.

JP-A-11-36866

  And in patent document 1, since the clearance gap is absorbed by the flexible member in order to absorb the attachment error of the member attached between the vehicle body side and the chassis frame side, the flexible material prevents deformation due to wind pressure or the like. In addition, the heavy radiator mounted on the chassis frame must be cantilevered, and the rigidity of the mounting part on the chassis frame must be greatly increased. The cooling device has a durability such as durability of the cooling device, and further, there is a defect such as a reduction in shielding performance of the shielding device due to the shake of the radiator.

  The present invention has been made to solve such problems. Cooling devices such as a radiator, an intercooler, a fan, and a fan shroud are integrated into a component so that the cooling system is parallel to the chassis frame. By reducing the amount of overhang in the vehicle width direction of the device and mounting it only on the chassis frame side, there is no connection with the vehicle body side, making assembly easier, reducing weight and reducing the cost by simplifying the mounting structure. An object of the present invention is to provide a cooling device for an engine that makes it possible.

  The present invention achieves such an object. In a cooling device for an engine, a radiator frame that is framed in a rectangular shape and the rectangular surface is disposed along a side wall of the vehicle, and a vehicle width direction of the radiator frame. A radiator that cools the engine coolant on the outer surface, an intercooler that is disposed outside the radiator in the vehicle width direction and cools the intake air of the engine, and that is disposed on the vehicle side wall outside the intercooler in the vehicle width direction. A radiator shroud having an outside air inlet facing the provided opening, and the radiator and the radiator shroud fixed to the outer surface of the radiator shroud in the vehicle front-rear direction so that the intercooler is integrated with the radiator and the radiator shroud. The radiator shroud bracket to be clamped and the radiator frame are fixed to the inner side surface in the vehicle width direction. A fan shroud having a cylindrical opening, a radiator fan loosely fitted in the opening, a fan drive mechanism for driving the radiator fan, and a drive mechanism support stay fixed to the radiator frame to support the fan drive mechanism; The radiator frame, the intercooler, the radiator shroud, the fan shroud, the fan drive mechanism, and the drive mechanism support stay are integrally attached to the radiator frame, and the chassis in the engine room of the vehicle is provided. It is attached to the frame via the radiator frame.

With this configuration, the fan shroud, the radiator fan, the fan driving mechanism for driving the radiator fan, and the fan driving mechanism are integrally configured on the radiator frame, and the structure is attached to the chassis frame via the radiator frame. Therefore, since the manufacturing error on the vehicle body side does not affect the mounting of the cooling device, the assembly becomes easy.
Furthermore, since the radiator fan and the fan drive mechanism for driving the radiator fan are integrated with the drive mechanism support stay and fixed to the radiator frame, the inner peripheral surface of the cylindrical opening of the fan shroud and the tip of the radiator fan Therefore, the cooling air passing through the radiator can be effectively sucked.
Further, since the intercooler and the radiator shroud are integrally sandwiched by the radiator shroud bracket together with the radiator, each member can be assembled to the chassis in the form of an assembly, so that each component can be assembled with high accuracy.

Preferably, in the invention of the present application, a periphery of the joint between the radiator and the intercooler, a joint perimeter of the intercooler and the radiator shroud, and a joint perimeter of the radiator shroud and the side wall of the vehicle It is preferable to interpose a sealing member made of a foamable flexible material that prevents air from being sucked in.

With such a configuration, the hot air exchanged by the radiator blown from the radiator fan is connected to the outer periphery of the joint between the radiator and the intercooler, the outer periphery of the joint between the intercooler and the radiator shroud, and the radiator shroud and the side wall of the vehicle. The outer periphery of the joint is sealed, and hot air is prevented from being sucked into the intercooler and the radiator from the outer periphery of the joint to maintain the cooling performance.

  The radiator, radiator shroud, fan, fan shroud, and fan drive mechanism are integrated into the radiator frame, and are mounted parallel to the chassis frame and attached to the chassis frame, so the overhang amount of the cooling device with respect to the chassis frame is reduced. As a result, the weight of the mounting member can be reduced by reducing the rigidity of the mounting member, and the assembly accuracy can be improved by integrating each cooling device into a component. Furthermore, since the structure is such that the connection of the cooling device to the vehicle body side is eliminated, it is possible to prevent the assembly performance from being lowered due to manufacturing errors when the vehicle body is assembled to the chassis frame.

The left side view of the whole vehicle which concerns on embodiment of this invention is shown. The assembly state external fitting figure of the cooling device concerning the embodiment of the present invention is shown. The top view of the assembly | attachment state to the chassis frame which concerns on embodiment of this invention is shown. The assembly state of the radiator frame and chassis frame concerning the embodiment of the present invention is shown. The perspective view of the radiator frame concerning the embodiment of the present invention is shown. The assembly state to the vehicle of a prior art Example is shown.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

(Embodiment)
FIG. 1 is a left side view of the entire vehicle according to the embodiment. In the case of the present embodiment, outside air that cools the intercooler 10 and the radiator 7 is introduced from an opening 33 that opens to the body side lid 30 that is a side wall of the vehicle body 2 at the rear of the vehicle 1. When assembling the vehicle body 2 to the chassis frame 20, the body side lid 30 avoids interference with a seal material C13 (to be described later), and is provided with a hinge (not shown) disposed on the upper side of the body side lid 30 in order to service the cooling device 4. It is possible to open upward.
An engine room 3 surrounded by a vehicle body 2 and a chassis frame 20 is formed at the rear portion of the vehicle 1. As shown in FIG. 3, an engine 19 is disposed in the engine room 3 along the front-rear direction of the vehicle 1 in the vehicle width direction, and the vehicle 1 travels between a pair of left and right chassis frames 20. Are arranged so that the crankshaft is along the front-rear direction of the vehicle 1.
A cooling device 4 is disposed on the left outer side of the pair of left and right chassis frames 20. As shown in FIG. 2, the cooling device 4 has a radiator 7 fixed to the left side in the vehicle width direction of the radiator frame 6 (see FIG. 4), and an intercooler 10 is further arranged on the left side in the vehicle width direction of the radiator 7. A sealing material A <b> 11 made of a flexible material is interposed between the intercooler 10.
The sealing material A11 is fixed to the four sides along the outer periphery of the rectangular radiator 7.
The hot air in the engine room 3 is not sucked into the radiator 7 from the periphery of the radiator 7. As the material of the sealing material A11, for example, NBR (nitrile rubber) or the like may be foamed to increase flexibility.
Further, a radiator shroud 8 is mounted on the left side in the vehicle width direction of the intercooler 10. A sealing material B12 made of a flexible material is also interposed between the intercooler 10 and the radiator shroud 8, and hot air in the engine room 3 is sucked into the intercooler 10 from around the intercooler 10 and the radiator shroud 8. There is no such thing.
The radiator shroud 8 has a shape having a hollow portion in the shape of a substantially quadrangular pyramid whose outer side in the vehicle width direction is reduced.
The sealing material B12 is fixed to four sides along the outer peripheral portion of the radiator shroud 8 on the surface of the radiator shroud 8 on the intercooler 10 side.
The material is the same as the sealing material A11.

In addition, an outside air introduction port 81 facing the opening 33 of the body side lid 30 is disposed at the left end of the radiator shroud 8 in the vehicle width direction. The outside air introduction port 81 has elasticity on the inner wall surface of the vehicle body 2. Then, a sealing material C13 that comes into contact is attached. This is also to prevent hot air from the engine room 3 from entering the radiator shroud 8. The material is the same as the sealing material A11.
The sealing material C13 has a structure (having sufficient thickness in the vehicle width direction) such that the sealing material C13 comes into contact with the inner wall surface of the vehicle body 2 with elasticity.
This can absorb manufacturing errors of the chassis frame 20, assembly errors of the radiator frame 6 to the chassis frame 20, manufacturing errors of the vehicle body 2, and the like.
Therefore, at the time of assembly, the body side lid 30 of the vehicle body 2 having the opening 33 is maintained in an open state and assembled. By lowering the vehicle body 2 from above and closing the body side lid 30 after the assembly is completed, the sealing material C13 is not damaged.
Further, after the body 2 is assembled, the body side lid 30 of the body 2 opened upward is lowered, so that the sealing material C13 comes into contact with the inner wall surface of the body 2 with elasticity.

A fan shroud 9 is fixed to the right side of the radiator frame 6 in the vehicle width direction (the vehicle inner side).
In addition, the fan 16 in which the inner wall surface of the fan shroud 9 and the tip of the blade are disposed with a slight gap and the conversion unit 141 of the fan drive mechanism 14 that drives the fan 16 are attached to and supported by the radiator frame 6. The drive mechanism support stay 15 is provided. (See Figure 3)
Since the fan shroud 9 and the drive mechanism support stay 15 that supports the fan 16 and the conversion unit 141 are attached to the radiator frame 6, the gap between the inner wall surface of the fan shroud 9 and the tip of the blades of the fan 16 is managed to be small. It becomes possible to suck the cooling air passing through the intercooler 10 and the radiator 7 effectively.
The drive mechanism support stay 15 is an outer peripheral portion of the fan shroud 9, and one end of the pipe shape is fixed to each of the rectangular squares of the radiator frame 6, and the other end has four to four pipes. The fan 16 and the conversion unit 141 of the fan drive mechanism 14 that drives the fan 16 are supported by four pipes in the vicinity of the center of the fan shroud 9 at the inner side in the width direction. .
The cooling device 4 includes a radiator frame 6, a radiator 7, an intercooler 10, a radiator shroud 8, a fan shroud 9, a fan 16, a fan drive mechanism 14, a drive mechanism support stay 15, and seal materials A, B, C, 11, 12, 13 is assembled integrally.

A structure in which the radiator frame 6 is mounted on the chassis frame 20 will be described with reference to FIG.
Frame stays 27 and 27 (see FIG. 4) are fastened with bolts to a bracket 61 disposed at an intermediate portion between the front and rear vertical frames 62 and 63 extending in the vertical direction of the radiator frame 6 shown in FIG. The chassis frame 20 has a rear intermediate cradle 25 fixed to the rear side wall of the chassis frame 20, an air cleaner support 29 that is also fixed to the side surface of the chassis frame 20 and supports an air cleaner (not shown), and the chassis frame 20. A front intermediate receiving base 31 fixed to the front wall 22 of the engine room 3 which is fixed and coupled to a pillar (not shown) on the vehicle body 2 side to constitute the engine room 3, and a stay 30 fixed to the front wall 22. And have been prepared.
The frame stays 27, 27 of the radiator frame 6 of the cooling device 4 in which the radiator 7, the intercooler 10 and the like are integrally assembled are fastened to the rear intermediate receiving base 25 and the front intermediate receiving base 31 via the rubber packing 26. To do. Next, the upper end portion of the rear vertical frame 62 is fastened to the bracket 28 fixed to the air cleaner support 29. Finally, the upper end of the front vertical frame 63 is fastened to the stay 30 fixed to the front wall.
As a result, the cooling device 4 is supported at four points on the left chassis frame 20 and can reliably function without being affected by the traveling vibration of the vehicle 1.
FIG. 4 shows the coupling structure of the chassis frame 20 and the radiator frame 6. The actual assembly of the chassis frame 20 includes the radiator 7, the radiator 7, the intercooler 10, and the like. In the state of the assembled cooling device 4, it is assembled to the chassis frame 20 via the radiator frame 6.

FIG. 3 is a plan view showing a state in which the cooling device 4 according to the embodiment is assembled to the chassis frame, and a method for driving the fan 16 will be described.
The fan drive mechanism 14 has a pulley portion that transmits the rotational force from the engine 19 to the pulley A17 and the pulley B21 by the belt 18, and the rotation of the pulley B21 is arranged substantially parallel to the crankshaft (not shown) of the engine 19. The shaft 142 extending forward in the vehicle front-rear direction, the conversion unit 141 that converts the rotation from the engine 19 to a right angle direction at the front end of the shaft 142 and rotationally drives the fan 16, and the front end of the shaft 142 and the conversion unit 141 And a spherical universal joint 143 interposed in the connecting portion.
The purpose of using the spherical universal joint 143 to connect the conversion mechanism and the shaft is to prevent the pulley 21 and the belt 18 from slipping. That is, since the pulley 21 is supported so that tension is applied to the belt 18, the rotation can be smoothly transmitted to the converting portion 141 even if the pulley 21 is displaced. Therefore, the universal joint 143 is disposed at the portion where the driving force is input to the conversion unit 141 even if the pulley 21 fluctuates in the vehicle width direction when the engine swings due to engine torque fluctuation and the engine crankshaft moves in the left-right direction. Since it is provided, it is possible to effectively absorb the fluctuation in the vehicle width direction of the drive shaft disposed in parallel with the engine crankshaft.
In the present embodiment, the fan drive mechanism 14 is constituted by the pulley portion, the shaft 142, and the universal joint 143. However, when an electric motor, an oil motor, or the like is used with the fan 16 as a drive source, the structure can be further simplified.

According to the present embodiment, the cooling device 4 includes a radiator frame 6, a radiator 7, an intercooler 10, a radiator shroud 8, a fan shroud 9, a fan 16, a fan drive mechanism 14, a drive mechanism support stay 15, and seal materials A and B. , C, 11, 12, 13 are integrated and supported by the chassis frame 20, so that assembly is possible without being affected by manufacturing errors between the vehicle body 2 and the chassis frame 20, and assembling is easy. And man-hours can be reduced. Compared to the conventional structure in which the stay for supporting the heavy cooling device 4 is arranged substantially at right angles to the chassis frame 20, the cooling device 4 is substantially parallel to the chassis frame 20, so the overhang amount of the center of gravity of the cooling device 4 with respect to the chassis frame 20 And the mounting portion of the cooling device 4 from the front-rear direction of the chassis frame 20 to the rear intermediate receiving base 25, the front intermediate receiving base 31, the upper upper end of the bracket 28 fixed to the air cleaner support 29, the front side Since the upper end portion is simply fixed to each of the stays 30 fixed to the front wall, the weight and cost can be reduced.
Furthermore, since the radiator shroud 8 is brought into close contact with the opening of the outer wall of the vehicle body 2 with the sealing material C13 and the sealing materials A11 and B12 are arranged at the joints of the cooling devices up to the fan shroud 9, The hot air can be prevented from rewinding, and the cooling capacity of the radiator 7 and the intercooler can be sufficiently exhibited.

  Cooling device for the purpose of improving the assembling property and cooling capacity of the cooling device arranged in the engine room 3 of the rear engine bus

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Engine room 4 Cooling device 5 Radiator shroud bracket 6 Radiator frame 7 Radiator 8 Radiator shroud 9 Fan shroud 10 Intercooler 14 Fan drive mechanism 15 Drive mechanism support stay 20 Chassis frame 30 Body side lid

Claims (2)

  In the engine cooling apparatus, a radiator frame that is rectangularly framed and the rectangular surface is disposed along a side wall of the vehicle, and a radiator that cools the engine cooling water to an outer side surface in the vehicle width direction of the radiator frame. An intercooler that is disposed outside the radiator in the vehicle width direction and cools the intake air of the engine, and introduces outside air facing an opening disposed on the side wall of the vehicle outside the intercooler in the vehicle width direction A radiator shroud having a mouth, a radiator shroud bracket that is fixed to an outer surface of the radiator and the radiator shroud in the vehicle front-rear direction and that sandwiches the intercooler integrally with the radiator and the radiator shroud, and a vehicle of the radiator frame A fan shroud having a cylindrical opening fixed to the inner surface in the width direction; A radiator fan loosely fitted in the opening, a fan drive mechanism that drives the radiator fan, and a drive mechanism support stay that is fixed to the radiator frame and supports the fan drive mechanism, and the radiator frame, the radiator, The intercooler, the radiator shroud, the fan shroud, the fan drive mechanism, and the drive mechanism support stay are integrally attached to the radiator frame, and are attached to the chassis frame in the engine room of the vehicle via the radiator frame. A cooling device for an engine.   The outer periphery of the joint between the radiator and the intercooler, the outer periphery of the joint between the intercooler and the radiator shroud, and the outer periphery of the joint between the radiator shroud and the side wall of the vehicle are prevented from sucking air from the surroundings. 2. The engine cooling device according to claim 1, wherein a sealing member made of a foamable flexible material is interposed.

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