JP2010248990A - Engine cooling device for industrial vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine cooling device for an industrial vehicle capable of efficiently leading cooling air from a cooling fan to a radiator core. <P>SOLUTION: The engine cooling device 1 for the industrial vehicle includes: a radiator 4 disposed behind an engine 2 for the industrial vehicle and cooling the engine 2; the cooling fan 5 sending cooling air to the radiator 4; and a fan shroud 6 attached to the radiator 4 and leading the cooling air to the radiator 4. The fan shroud 6 is composed of: a fan shroud body 13 covering the air sending side of the cooling fan 5 and also formed with an opening 15 for arranging the cooling fan 5; a pair of right and left divided adjusting plates 22 which are substantially semi-annular plates for adjusting a clearance between the opening 15 of the fan shroud body and the cooling fan 5 and formed with mounting holes 28 having sufficient pore diameters for adjusting the clearance; and bolts 12a and washers 12b for attaching the divided adjusting plates 22 to the fan shroud body 13 through the mounting holes 28. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an engine cooling device for an industrial vehicle.

  As an engine cooling device for industrial vehicles, for example, forklifts, a radiator for guiding engine cooling water through a pipe and cooling the cooling water by a cooling fan is used. In order to efficiently guide the cooling air from the cooling fan to the radiator core, which is a part to be cooled, a fan shroud in which a circular opening for arranging the cooling fan is formed is attached to the front surface of the radiator. The opening has an inner diameter larger than that of the cooling fan so that the rotating cooling fan does not come into contact with the fan shroud and break while the forklift travels on a rough road surface. Usually, a certain gap (for example, 10 to 15 mm) is formed between the opening and the outer edge of the cooling fan (for example, Patent Document 1).

Utility Model Registration No. 2555413

  In a forklift, the cooling fan is provided on the engine side, and the fan shroud is provided on the radiator side. Therefore, depending on the shape of the vehicle, it is difficult to align the center of the cooling fan and the fan shroud opening. Become.

  Further, if the center of the cooling fan and the fan shroud opening is shifted, the cooling efficiency is lowered, and it is difficult to mount the fan shroud on the radiator in a vehicle in which the center of the cooling fan and the center of the radiator core are greatly shifted. There's a problem. In addition, since the cooling fan is provided on the engine side, it is difficult to remove the fan shroud after installing the engine cooling device on the forklift, and there is also a maintenance problem that it is not easy to clean and inspect the cooling fan. is there.

  Therefore, the present invention provides an engine cooling device for an industrial vehicle that can efficiently guide the cooling air from the cooling fan to the radiator core even when the center positions of the cooling fan and the radiator core are shifted, and has good maintainability. The purpose is to do.

In order to solve the above problems, an engine cooling device for an industrial vehicle according to claim 1 of the present invention includes a radiator that is disposed behind an engine of the industrial vehicle and cools the engine, and a cooling fan that sends cooling air to the radiator. An engine cooling device for an industrial vehicle, which is provided with a fan shroud attached to the radiator and guiding the cooling air to the radiator,
The fan shroud is a box that covers the air blowing side of the cooling fan and is attached to the radiator, and an opening for arranging the cooling fan and a hole for bolt connection are formed around the opening. The fan shroud main body, a semicircular plate for adjusting the gap between the fan shroud main body opening and the cooling fan, and a semicircular cooling fan arrangement opening having an inner diameter smaller than the inner diameter of the fan shroud main body opening And a pair of left and right split adjusting plates in which the mounting holes for adjusting the gap are formed with a larger inner diameter than the bolt joint hole of the fan shroud body, and these split adjusting plates are attached to the fan shroud body. It is comprised from the volt | bolt and washer for attaching via an attachment hole.

  An engine cooling device for an industrial vehicle according to claim 2 is the engine cooling device for an industrial vehicle according to claim 1, wherein a flange portion is provided on the inner periphery of the cooling fan arrangement opening of the division adjustment plate. Is.

Furthermore, the engine cooling device for an industrial vehicle according to claim 3 is the engine cooling device for an industrial vehicle according to claim 2,
The protrusion width of the flange portion is different between the front and back surfaces of the split adjustment plate, and a guide piece is attached in a direction perpendicular to the flange portion and the end face of the split adjustment plate, and the guide piece is notched at the contact portion with the split adjustment plate. A guide groove is formed in the edge of the opening portion of the fan shroud main body to insert the guide piece.

According to the configuration of the engine cooling device for an industrial vehicle, the center of the cooling fan and the center of the fan shroud opening can be easily aligned, and the cooling efficiency can be improved.
In addition, since the adjustment plate that covers the outer periphery of the cooling fan is a divided adjustment plate divided into left and right, the above-mentioned division adjustment plate can be attached and removed with the engine and radiator installed on an industrial vehicle, improving maintainability Can be made.

  In addition, the fan shroud flange that covers the outer periphery of the cooling fan can introduce and rectify the cooling air without leakage, and can select either a long or short flange. The cooling efficiency can be further improved.

It is a side view which shows the engine cooling device of the forklift which concerns on Example 1 of this invention. It is a perspective view of a fan shroud and a radiator in the engine cooling device of the forklift. It is a perspective view of the fan shroud and radiator in the engine cooling device of the forklift truck concerning Example 2 of the present invention. It is a perspective view of a fan shroud and a radiator in an engine cooling device of a forklift truck concerning Example 3 of the present invention.

Hereinafter, an engine cooling apparatus for an industrial vehicle according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
In the first embodiment, a case where the industrial vehicle is a forklift will be described.

  As shown in FIG. 1, the engine cooling device 1 for a forklift is generally arranged behind the engine 2 to guide the cooling water of the engine 2 through a pipe 3 and to cool the cooling water. A radiator 4, a cooling fan 5 provided on the rear surface of the engine 2 for cooling the cooling water by sending cooling air to the radiator 4, and a radiator that is a portion to be cooled of the radiator 4 by cooling the cooling air from the cooling fan 5 It consists of a fan shroud 6 for guiding it to the core.

  Therefore, when the engine 2 is started to run the forklift, the cooling water of the engine 2 absorbs the heat of the engine 2 and is guided to the radiator core by the pipe 3 and from the cooling fan 5 guided by the fan shroud 6. The engine 2 is radiated by receiving the cooling air.

Hereinafter, the configuration of the fan shroud 6 and the radiator 4 will be described with reference to FIG.
The fan shroud 6 includes a fan shroud main body 13, an adjustment plate 11 that adjusts a clearance between the outer periphery of the cooling fan 5 and the fan shroud 6, and a bolt 12a, a round washer 12b, and a nut 12c for joining them. It is composed of Further, the adjusting plate 11 is divided into left and right.

  The fan shroud main body 13 has a circular opening 15 sufficiently larger (for example, about 50 to 70 mm) than the outer peripheral diameter (diameter) of the cooling fan 5, and a hole for joining a bolt 12 a around the opening 15. Are formed at several locations (for example, four locations), the mounting plate portion 14 for mounting the cooling fan 5, the side plate portion 16 bent backward from the four sides of the mounting plate portion 14, and the left and right sides of the upper side plate portion 16. Are attached to the left and right side plate portions 16 and support the fan shroud main body 13, respectively, which are metal fittings for fixing the fan shroud main body 13 to the front surface of the radiator 4. And a support piece 18 to be formed. Of course, the opposite side of the mounting plate portion 14 is an opening surface. The nut 12c may be welded to a hole position for joining the bolt 12a on the rear surface of the mounting plate portion 14. On the other hand, the radiator 4 has a substantially thick plate shape having a rectangular shape in front view and a longitudinal direction in the left-right direction, and the fan shroud main body 13 has an opening surface in contact with the front side having a portion to be cooled. The shroud 6 is attached, screw holes for joining the L-shaped brackets 17 of the fan shroud main body 13 are formed on the left and right ends of the upper surface, respectively, and the fan shroud main body 13 is supported on the left and right ends of the front surface. Support members 19 having grooves for receiving the pieces 18 are respectively attached.

  On the other hand, the divided adjusting plates 22 obtained by dividing the adjusting plate 11 into left and right are each semicircular, and a semicircular annular plate portion 24 that covers the gap between the cooling fan 5 and the opening 15 of the fan shroud main body 13. And a guide piece 23 for coming into contact with the split end face of the other split adjusting plate 22 from the end face of the semi-annular plate portion 24 of both split end faces to the front. A circular opening 26 is formed on the inner periphery of the adjustment plate 11 formed by bringing the left and right division adjustment plates 22 into contact with each guide piece 23.

  The semicircular annular plate portion 24 has an outer diameter larger than the opening portion 15 of the mounting plate portion 14 of the fan shroud main body 13, and an inner diameter of the inner opening portion 26 is 20 mm larger than the outer diameter (diameter) of the cooling fan 5. The mounting plate 27 has a semicircular mounting portion 27 at a position corresponding to a hole for joining the bolt 12a of the mounting plate portion 14 on the outer periphery, and the adjustment plate 11 is attached to the mounting plate portion on the mounting portion 27. 14 is formed with a mounting hole 28 (a hole diameter of about 30 to 40 mm) including an adjustment allowance for mounting in a position adjustable manner.

The adjusting plate 11 is attached to the fan shroud main body 13 by bolts 12a, round washers 12b and nuts 12c.
In the above configuration, the installation of the engine cooling device 1 on the forklift will be described. The fan shroud main body 13 and the radiator 4 are configured such that the support piece 18 of the fan shroud main body 13 is guided and supported in the groove portion of the support member 19 of the radiator 4, and the L-shaped bracket 17 of the fan shroud main body 13 is mounted on the upper surface of the radiator 4 with a small screw. It is united by being attached to.

  Since the position of the cooling fan 5 provided on the engine 2 side is fixed by the installation of the engine 2, the radiator 4 is installed so that the cooling fan 5 is located in the opening 15 of the fan shroud main body 13. . In some cases, the center of the cooling fan 5 and the center of the opening 15 of the fan shroud body 13 do not coincide with each other due to manufacturing errors. In this case, the radiator 4 which is a heavy object is not moved, and the cooling fan 5 One split adjustment plate 22 is attached to the fan shroud body 13 so that the center and the center of the opening (cooling fan arrangement opening, hereinafter also referred to as adjustment plate opening) 26 coincide. And the guide piece 23 of the right and left division | segmentation adjustment plates 22 is contact | abutted so that it may correspond, the other division | segmentation adjustment plate 22 is positioned, and the other division | segmentation adjustment plate 22 is attached. Actually, the divisional adjustment plate 22 is positioned so that the gap between the outer periphery of the cooling fan 5 and the inner peripheral surface of the adjustment plate opening 26 is uniform, and rounded by the bolts 12a and nuts 12c of the mounting holes 28. The division adjusting plate 22 is fixed via the washer 12b. Further, depending on not only manufacturing errors but also the shape of the vehicle and the position of the cooling fan 5 provided on the engine 2 side, the center of the cooling fan 5 may not coincide with the center of the opening 15 of the fan shroud body 13. In this case as well, the center adjustment is performed by the division adjustment plate 22 in the same manner. The engine 2 and the radiator 4 are connected by a cooling water pipe 3.

  As described above, even when the center of the cooling fan 5 and the center of the opening 15 of the fan shroud main body 13 are deviated, the gap between the outer periphery of the cooling fan 5 and the inner peripheral surface of the divided adjustment plate opening 26 is made uniform. By adjusting the position of the adjusting plate 11, the cooling fan 5 and the center of the opening 26 of the fan shroud 6 can be easily aligned.

  That is, by making the gap between the outer periphery of the cooling fan 5 and the inner peripheral surface of the opening 26 of the fan shroud 6 uniform, the cooling air from the cooling fan 5 can be smoothly introduced into the fan shroud 6. Wind can be efficiently guided to the radiator core. Further, with the engine 2 and the radiator 4 installed on the forklift, each of the divisional adjustment plates 22 can be attached and removed, and the guide pieces 23 of the divisional adjustment plates 22 are brought into contact with each other to be easily opened. Since the part 26 can be formed, the maintainability can also be improved.

Next, an engine cooling apparatus for industrial vehicles according to Embodiment 2 of the present invention will be described with reference to FIG.
In the second embodiment, the case where the industrial vehicle is a forklift will be described.

Since the engine cooling device 1 for a forklift according to the second embodiment is almost the same as the configuration according to the first embodiment, the description of the same parts is omitted.
In the engine cooling device 1 for a forklift according to the first embodiment, the split adjustment plate 22 includes a semi-annular plate portion 24 and a guide piece 23. As shown in FIG. The half flange portion 35 is attached to the inner periphery of each division adjusting plate 22 in the first embodiment.

  That is, each division adjustment plate 32 has a semicircular shape, and includes a semicircular plate portion 34 and a guide piece 33, and the semicircular plate on the inner periphery of the semicircular plate portion 34. A semi-flange portion 35 that is attached in a direction orthogonal to the portion 34 and protrudes with the same width on the front side and the back side of the semi-annular plate portion 34 is provided. In addition, an opening (an opening for cooling fan arrangement, hereinafter also referred to as an adjustment plate opening) 36 is formed on the inner periphery of the adjustment plate 31 formed by bringing the left and right divided adjustment plates 32 into contact with each guide piece 33. The

  In the above configuration, as in the first embodiment, after the engine 2 and the radiator 4 are installed on the forklift, the center of the cooling fan 5 arranged in the opening 15 of the fan shroud main body 13 and the adjustment plate opening 36 are arranged. Each division adjustment plate 32 is attached so that the centers coincide.

  The adjustment plate 31 introduces the cooling air from the cooling fan 5 into the fan shroud 6 without leakage because the flange portion 35 of the adjustment plate 31 covers the outer periphery of the cooling fan 5, and the flange portion 35 further includes the fan shroud body. Since it protrudes into the fan 13, the cooling air introduced into the fan shroud 6 is rectified and guided to the radiator core.

  Thus, in the second embodiment, since the flange portion 35 covers the outer periphery of the cooling fan 5 and rectifies the cooling air, the cooling air can be more efficiently guided to the radiator core. In addition, the cooling efficiency can be further improved.

Next, an engine cooling device for an industrial vehicle according to Embodiment 3 of the present invention will be described with reference to FIG.
In the third embodiment, the case where the industrial vehicle is a forklift will be described.

Since the engine cooling device 1 for a forklift according to the third embodiment is almost the same as the configuration according to the first and second embodiments, the description of the same parts is omitted.
In the engine cooling device 1 for a forklift according to the second embodiment, the split adjustment plates 32 have the same protruding width of the half flange portion 35 from the half annular plate portion 34 on the front side and the rear side, and the guide piece 33 is As shown in FIG. 4, in the third embodiment, the split adjustment plate 42 differs in the protruding width of the half flange portion 45 between the front side and the rear side, and the guide piece 43 also has the front side and the rear side. Is attached to the side. Further, in the inner periphery of the adjustment plate 41 formed by bringing the left and right divided adjustment plates 42 into contact with each guide piece 43, an opening (a cooling fan arrangement opening, hereinafter referred to as an adjustment plate opening) is provided, as in the second embodiment. 46) is formed. That is, in order to sufficiently cover the periphery of the cooling fan 5 with the flange portion 45, the protrusion width of the half flange portion 45 of the split adjustment plate 42 is made different between the front and back sides, and either It is set as the structure which can be attached to the fan shroud main body 13 also on the side. That is, each of the split adjustment plates 42 is semicircular as in the second embodiment, and includes a semicircular annular plate portion 44, a semi-flange portion 45, and a guide piece 43 at the split end surface. The half flange portion 45 is attached so that the projecting width in the front-rear direction from the semi-annular plate portion 44 is different. Further, the guide piece 43 is bent vertically from the divided end surface of the half flange portion 45 to cover the divided end surface of the semicircular annular plate portion 44, and the division adjusting plate 42 is attached to the mounting plate portion 14 of the fan shroud main body 13. The guide piece 43 is formed with a slit 47 through which the attachment plate portion 14 can be inserted along a contact line with the end surface of the semicircular annular plate portion 44.

  On the other hand, guide grooves 48 through which the guide pieces 43 can be inserted are formed in the upper and lower portions of the opening 15 of the fan shroud main body 13 in the direction perpendicular to the inner peripheral surface of the opening 15, that is, the upper guide. The groove 48 is formed upward from the opening 15, and the lower guide groove 48 is formed downward from the opening 15.

  Also in the above configuration, the split adjustment plate 42 can be attached and removed after the engine 2 and the radiator 4 are installed on the forklift as in the first and second embodiments. Further, as in the second embodiment, the flange portion 45 introduces cooling air to rectify. However, unlike the first and second embodiments, the split adjustment plate 42 according to the third embodiment is turned over without interfering with the mounting plate portion 14 because the guide piece 43 is inserted into the guide groove 48. Can be attached. Further, since the protrusion width of the half flange portion 45 is different between the front side and the back side of the division adjusting plate 42, the distance between the front and rear of the cooling fan 5 and the fan shroud main body 13 is seen, and a pair of left and right division adjustments are made around the cooling fan 5. A surface having an appropriate protruding width of the flange portion 45 is selected as the front side so that the flange portion 45 of the plate 42 can be sufficiently covered. And in the attachment of the division | segmentation adjustment board 42 to the attachment board part 14 of the fan shroud main body 13, since the guide piece 43 of the division | segmentation adjustment board 42 is penetrated by the guide groove 48 of the attachment board part 14 formed in the up-down direction, The division adjustment plate 42 can be moved in the vertical direction, and the attachment plate portion 14 is inserted into the slit 47 formed in the guide piece 43, so that the division adjustment plate 42 can also be moved in the horizontal direction. Therefore, as in the first and second embodiments, specifically, the gap between the outer periphery of the cooling fan 5 and the adjustment plate opening 46 so that the center of the cooling fan 5 and the center of the adjustment plate opening 46 coincide. Are positioned so as to be uniform, and each division adjusting plate 42 is attached.

  As described above, in the third embodiment, since the guide groove 48 is formed in the opening 15 of the fan shroud main body 13, the guide piece 43 of each division adjustment plate 42 and the fan shroud main body 13 do not interfere with each other and turn over. Thus, each division adjusting plate 42 can be attached to the fan shroud main body 13. On the other hand, the split adjustment plates 42 have different protrusion widths of the half flange portion 45 on the front and back sides, so that the optimum surface can be selected on the front side in view of the front-rear positional relationship between the cooling fan 5 and the fan shroud body 13. That is, since the front-rear positional relationship between the cooling fan 5 and the flange portion 45 of the split adjustment plate 42 can be improved, the cooling air from the cooling fan 5 can be efficiently introduced into the fan shroud 6 and the cooling efficiency can be improved. .

  Further, since the slits 47 are formed in the guide piece 43, the respective divisional adjustment plates 42 can be adjusted by moving in the left-right direction without interfering with the fan shroud main body 13, and therefore the center of the cooling fan 5 and the adjustment plate Since the centers of the openings 46 can be made to coincide with each other, and each of the division adjustment plates 42 is obtained by dividing the adjustment plate 41 into left and right, therefore, the third embodiment also has the effect of the first embodiment. Furthermore, since the division adjusting plate 42 in the third embodiment has the half flange portion 45 as in the second embodiment, the effect of the second embodiment is also obtained. Therefore, in the third embodiment, in addition to the effects in the first and second embodiments, the cooling efficiency can be further improved.

DESCRIPTION OF SYMBOLS 1 Engine cooling device 2 Engine 4 Radiator 5 Cooling fan 6 Fan shroud 11 Adjustment plate 12a Bolt 12b Round washer 13 Fan shroud main body 15 Fan shroud main body opening 26 Adjustment plate opening 28 Mounting hole 31 Adjustment plate 32 Divided adjustment plate 35 Half flange Part 43 Guide piece 47 Slit 48 Guide groove

Claims (3)

An industrial vehicle engine comprising a radiator disposed behind an engine of an industrial vehicle for cooling the engine, a cooling fan for sending cooling air to the radiator, and a fan shroud attached to the radiator for guiding the cooling air to the radiator A cooling device,
The fan shroud is a box that covers the air blowing side of the cooling fan and is attached to the radiator, and an opening for arranging the cooling fan and a hole for bolt connection are formed around the opening. The fan shroud main body, a semicircular plate for adjusting the gap between the fan shroud main body opening and the cooling fan, and a semicircular cooling fan arrangement opening having an inner diameter smaller than the inner diameter of the fan shroud main body opening And a pair of left and right split adjusting plates in which the mounting holes for adjusting the gap are formed with a larger inner diameter than the bolt joint hole of the fan shroud body, and these split adjusting plates are attached to the fan shroud body. An engine cooling device for an industrial vehicle, characterized by comprising a bolt and a washer for mounting via a mounting hole.   2. The engine cooling apparatus for an industrial vehicle according to claim 1, wherein a flange portion is provided on an inner periphery of the cooling fan arrangement opening of the division adjusting plate.   The protrusion width of the flange portion is different between the front and back surfaces of the split adjustment plate, and a guide piece is attached in a direction perpendicular to the flange portion and the end face of the split adjustment plate, and the guide piece is notched at the contact portion with the split adjustment plate. 3. The engine cooling device for an industrial vehicle according to claim 2, wherein a guide groove is formed, and a guide groove for inserting the guide piece is formed at an edge of the opening of the fan shroud main body.

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