WO2017155067A1

WO2017155067A1 - Engine

Info

Publication number: WO2017155067A1
Application number: PCT/JP2017/009599
Authority: WO
Inventors: 山口　直樹; 延広渡辺
Original assignee: ヤンマー株式会社
Priority date: 2016-03-11
Filing date: 2017-03-09
Publication date: 2017-09-14
Also published as: JP2017161053A; JP6494547B2

Abstract

Provided is an engine having disposed thereon a suspension device provided so as not to hinder the mounting of a fuel tank and a radiator. An engine (1) is provided with: a cylinder block (2); a radiator (9) provided on the upper surface of the cylinder block (2); a fan case (13) provided to a side surface of the radiator (9) and having a cooling fan (12) provided therein; and a suspension device (11) affixed to the upper surface of the cylinder block (2). The engine (1) is configured such that the fan case (13) has insertion holes (13r, 13p) through which the suspension device (11) is inserted.

Description

engine

The present invention relates to an engine, and more particularly to an engine provided with a lifting tool.

Conventionally, an engine in which a fuel tank and a radiator are arranged adjacent to each other on a cylinder block is known (see Patent Document 1). And the lifting bolt (lifting tool) which can lift an engine is provided in the clearance gap between a fuel tank and a radiator. A stay for fixing the fuel tank is also provided in the gap between the fuel tank and the radiator.

Since the lifting bolt must support the heavy engine, it must be placed near the center of gravity of the engine. Considering this point, the lifting bolt is disposed in the gap between the fuel tank and the radiator. On the other hand, the stay needs to have sufficient strength to support the fuel tank containing the fuel, and also needs to be large enough.

JP 2013-151913 A

However, since the gap between the fuel tank and the radiator is narrow, it is very difficult to arrange the stay and the lifting bolt, and various devices have been made to the stay as in Patent Document 1. On the other hand, there is room for further improvement in the arrangement of the lifting bolts.

An object of the present invention is to provide an engine in which a lifting tool is disposed so as not to hinder the installation of a fuel tank and a radiator.

An engine comprising a cylinder block, a radiator provided on the upper surface of the cylinder block, a fan case provided on a side surface of the radiator and having a cooling fan, and a lifting tool fixed to the upper surface of the cylinder block The fan case has an insertion hole through which the lifting tool is inserted.

In the engine described above, a flywheel may be provided on a side surface of the cylinder block, and the insertion hole may be disposed at a position near the flywheel of the fan case.

In the engine described above, a cutout portion that exposes the lifting tool to the cooling fan side may be formed in the middle of the insertion hole.

According to the above engine, the fan case has an insertion hole for inserting the lifting tool, and the lifting tool is disposed at a position penetrating the fan case and does not pass through the side surface of the radiator. Therefore, the fuel tank is installed adjacent to the radiator. It will not interfere with you. Further, since the lifting tool is not fastened to the joint portion between the radiator and the cylinder block, the sealing performance of the joint portion between the radiator and the cylinder block is not affected, and there is no possibility that the cooling water leaks. Further, since the lifting tool can be supported on the fan case with a nut or the like, there is no need to separately provide a stay for supporting the lifting tool.

Further, according to the above engine, the lifting tool can be disposed near the center of gravity of the engine by arranging the insertion hole at a position near the flywheel which is a heavy object of the engine, so that the engine can be lifted stably. Can do.

Further, according to the engine described above, by providing the notch that exposes the lifting tool to the cooling fan side, the ventilation area inside the fan case can be increased, and the cooling performance by passing the lifting tool through the fan case can be improved. Degradation can be minimized. Further, the fan case is reduced in weight by the amount notched by the notch.

It is a front side perspective view of an engine. It is a rear surface side perspective view of an engine. FIG. 3 is an enlarged perspective view of the periphery of a radiator and a cooling fan with a radiator cover removed. FIG. 3 is an enlarged perspective view of the vicinity of a radiator cover stay. It is a figure explaining the other form of a radiator cover stay. It is a perspective view of the left surface side which shows a lifting tool, a cooling fan, and a fan case. It is a disassembled perspective view of the right surface side which shows a lifting tool and a fan case. It is an expansion perspective view of the engine which decomposed | disassembled the light cover and the side cover.

<Overall engine configuration>
FIG. 1 is a front perspective view of the engine, and FIG. 2 is a rear perspective view of the engine. In the drawing, the front-rear direction, the left-right direction, and the up-down direction of the engine are shown.

Engine 1 is a horizontal water-cooled diesel engine. In the engine 1, a cylinder head 3 is provided in front of the cylinder block 2. Above the cylinder head 3, an air cleaner 4 and a muffler 5 are provided side by side. A gear case 6 is provided on the left surface of the cylinder block 2. A flywheel 7 is provided on the right surface of the cylinder block 2. Two support legs 8 that support the cylinder block 2 are attached to the lower surface of the cylinder block 2.

The radiator 9 and the fuel tank 10 are provided side by side on the upper surface of the cylinder block 2. A lifting tool 11 that can lift the entire engine 1 is provided on the upper surface of the cylinder block 2. A fan case 13 in which a cooling fan 12 (see FIG. 3) is provided is provided on the right surface of the radiator 9. A cooling air outlet screen 14 is provided on the right surface of the fan case 13. A cooling air inlet screen 15 is provided on the left surface of the radiator 9.

Also, on the rear surface of the fuel tank 10, there are provided a light 16 for illumination, reflectors 17 disposed on the left and right of the light 16, and a light cover 18 surrounding the light 16 and the reflector 17. A left side cover 19 A and a right side cover 19 B connected to the light cover 18 are provided on the left side and the right side of the fuel tank 10.

In the cylinder block 2, a crankshaft 20 is installed in the left-right direction. The crankshaft 20 is rotatably supported by the cylinder block 2 via a bearing (not shown). The right end portion of the crankshaft 20 protrudes from the right surface of the cylinder block 2. A flywheel 7 is attached to the right end portion of the crankshaft 20.

Also, a liner (not shown) is provided in the front and rear horizontal direction at the front of the cylinder block 2. In the cylinder block 2, a water jacket (not shown) through which cooling water flows is formed around the liner. The water jacket opens at the upper surface of the cylinder block 2. The water jacket communicates with a cooling water passage (not shown) formed in the cylinder head 3.

Also, a piston (not shown) is provided in the liner so as to be able to reciprocate (slide) in the horizontal direction. The piston is connected to the crankshaft 20 via a connecting rod (not shown). The reciprocating motion of the piston is converted into the rotational motion of the crankshaft 20 through the connecting rod. A combustion chamber (not shown) is formed between the liner, the piston, and the cylinder head 3.

<Radiator>
FIG. 3 is an enlarged perspective view of the periphery of the radiator 9 and the cooling fan 12 with the radiator cover removed. The radiator 9 includes a radiator core (not shown), an upper tank 91, a radiator frame 92, a radiator cover 93 (see FIGS. 1 and 2), and a radiator cover stay 94.

The radiator core is accommodated in the radiator frame 92. In the radiator core, a plurality of cooling water tubes through which cooling water flows are arranged in the vertical direction. A plurality of radiating fins are arranged between the cooling water tubes.

The upper tank 91 is disposed on the upper surface of the radiator core and is supported by the radiator frame 92. An upper end portion of the cooling water tube is inserted into the upper tank 91 so that the upper tank 91 and the cooling water tube communicate with each other. A replenishing port 91 a for replenishing cooling water is provided on the upper surface of the upper tank 91. A radiator cap 911 is attached to the supply port 91a.

The radiator frame 92 is erected on the upper surface of the cylinder block 2 and supports the radiator core and the upper tank 91. The radiator cover 93 is a cover that covers the upper portions of the radiator 9 and the fan case 13, and is fixed to the radiator cover stay 94 and the fan case 13 with bolts.

The radiator cover stay 94 is a U-shaped plate member that supports the radiator cover 93. The radiator cover stay 94 is disposed so as to straddle the upper surface of the upper tank 91 on the left side of the supply port 91a in the front-rear direction. Then, both end portions of the radiator cover stay 94 are joined to the radiator frame 92 by brazing or the like. Thus, by fixing both ends of the radiator cover stay 94 to the radiator frame 92 instead of the upper tank 91, the both ends of the radiator cover stay 94 are not affected by the thermal expansion of the upper tank 91, and the radiator cover The rigidity of the stay 94 can be improved while ensuring the reliability.

Also, the central portion of the radiator cover stay 94 is joined to the upper surface of the upper tank 91 by brazing or the like. Thereby, the rigidity of the radiator cover stay 94 is improved. On the other hand, even when the upper tank 91 is thermally expanded, since the joint between the upper tank 91 and the radiator cover stay 94 is only at one place on the upper surface of the upper tank 91, the stress applied to the radiator cover stay 94 is small and has almost no influence. There is no.

FIG. 4 is an enlarged perspective view of the periphery of the radiator cover stay 94. Bolt holes 94 a and 94 b are formed at positions near the front and rear ends of the upper surface of the radiator cover stay 94 and offset leftward from the upper tank 91. As a result, the distance between the bolts fixed to the radiator cover stay 94 and the bolts fixed to the fan case 13 is increased, so that the radiator cover 93 is stably supported. Further, it is also possible to avoid the front end of the bolt protruding downward from the bolt holes 94a and 94b from contacting the upper tank 91.

FIG. 5 is a diagram for explaining another form of the radiator cover stay. Another form of the radiator cover stay 95 is an L-shaped plate member. Then, the two radiator cover stays 95 are joined to the radiator frame 92 by brazing or the like. Thus, by fixing the radiator cover stay 95 to the radiator frame 92 instead of the upper tank 91, the radiator cover stay 95 is not affected by the thermal expansion of the upper tank 91, and the reliability of the radiator cover stay 95 is improved. The rigidity can be improved while ensuring.

Also, a bolt hole 95a is formed at a position offset to the left from the upper tank 91 on the upper surface of the radiator cover stay 95. As a result, the distance between the bolt fixed to the radiator cover stay 95 and the bolt fixed to the fan case 13 becomes long, so that the radiator cover 93 is stably supported. Further, it is also possible to avoid the tip of the bolt protruding downward from the bolt hole 95a from contacting the upper tank 91.

<Cooling fan>
As shown in FIG. 3, the cooling fan 12 has a fan shaft 12 a at the center of rotation, is covered with a fan case 13, and is provided on the right surface of the radiator 9. The fan shaft 12a is disposed in the fan case 13 in the left-right direction, and is rotatably supported by the fan case 13 via a bearing (not shown). A fan pulley 121 is provided on the fan shaft 12a. A fan belt 21 is wound around the fan pulley 121. The fan belt 21 is wound on a crank pulley (not shown) provided on the crankshaft 20 and inside the flywheel 7, and transmits the power of the crankshaft 20 to the cooling fan 12.

When the cooling fan 12 rotates, the cooling air flows from the cooling air inlet screen 15 into the internal passage in the radiator 9 and is discharged from the cooling air outlet screen 14 to the outside of the engine 1. Thereby, the radiator 9 is cooled by the cooling air of the cooling fan 12.

<Fan case and lifting tool>
6 is a left perspective view showing the lifting tool 11, the cooling fan 12, and the fan case 13, and FIG. 7 is an exploded perspective view showing the lifting tool 11 and the fan case 13 on the right side.

As shown in FIGS. 6 and 7, the lifting tool 11 is a lifting bolt configured by sequentially fastening an eye bolt 111, an upper nut 112, a fastening nut 113, and a lower bolt 114. In addition, the combination of the bolt and nut in the lifting tool 11 is arbitrary. The shape of the lifting tool 11 is not limited, and may be a curved or bent shape other than the linear shape.

The fan case 13 is an integrally molded product such as resin, and has a substantially cylindrical fan housing portion 13a for housing the cooling fan 12, and a substantially square shape formed substantially along the left circular surface of the fan housing portion 13a. And an attachment frame 13b. A fan support 13c that rotatably supports the fan shaft 12a is disposed at the center of the space enclosed by the fan accommodating portion 13a and the mounting frame 13b. The fan support base 13c is supported by four support legs 13d extending from the fan support base 13c in the vertical and front-back directions and connected to the inner walls of the fan housing portion 13a and the mounting frame 13b.

The mounting frame 13b has a mounting hole 13e formed so as to penetrate the protruding portion protruding from the front portion in the left-right direction, and a mounting hole formed so as to penetrate the protruding portion protruding from the rear portion in the left-right direction. 13f is provided. Bolts are inserted into the mounting

holes

13 e and 13 f and fastened to the radiator frame 92.

The fan housing portion 13a has a mounting hole 13g formed so as to penetrate in the left-right direction through the projecting portion protruding from the front lower portion thereof, and an attachment formed so as to penetrate in the left-right direction through the projecting portion projected thereafter from the lower portion. A hole 13h is provided. Bolts are inserted into the mounting holes 13 g and 13 h and fastened to the right surface of the cylinder block 2. Accordingly, since the lower end portion of the fan case 13 is not fixed to the upper surface of the cylinder block 2, it is not necessary to provide a bolt hole for fixing the fan case on the upper surface of the cylinder block 2. Therefore, the space on the upper surface of the cylinder block 2 can be reduced and the left and right width of the cylinder block can be reduced.

The fan housing portion 13a is formed so as to penetrate in the left-right direction through the mounting hole 13i formed so as to penetrate in the left-right direction through the projecting portion projecting from the front right portion thereof. Mounting holes 13j. The cooling air outlet screen 14 is fixed to the mounting

holes

13i and 13j with bolts.

The fan housing portion 13a has a mounting hole 13k formed so as to penetrate the projecting portion protruding from the front upper portion in the vertical direction, and an attachment formed so as to penetrate the projecting portion projected from the upper portion in the vertical direction thereafter. A hole 13m is provided. A radiator cover 93 is fixed to the mounting

holes

13k and 13m with bolts.

The upper part insertion hole 13n and the lower part insertion hole 13p which penetrate the lifting tool 11 to an up-down direction are provided in the rear part of the attachment frame 13b. A cutout portion 13q that exposes the lower bolt 114 portion of the lifting tool 11 to the cooling fan 12 side is formed in the middle portion between the upper insertion hole 13n and the lower insertion hole 13p. In other words, it can be said that a portion protruding into the fan case 13 between the upper insertion hole 13n and the lower insertion hole 13p is cut out. A support leg 13d passes through the middle portion of the notch 13q, and an intermediate insertion hole 13r is formed in the support leg 13d for inserting the lower bolt 114 portion of the lifting tool 11 in the vertical direction.

Note that the cutout portion 13q may not be provided. For example, the upper insertion hole 13n, the intermediate insertion hole 13r, and the lower insertion hole 13p may be connected to form one insertion hole. Moreover, if the support leg 13d in which the intermediate insertion hole 13r is formed is arranged avoiding the lifting tool 11, the intermediate insertion hole 13r can be omitted. Further, the insertion hole may be protruded to the outside of the fan case 13 so as not to protrude toward the ventilation path inside the fan case 13.

With this configuration, the lower end of the lower bolt 114 protruding from the lower end of the lower insertion hole 13p is fastened to the bolt hole formed on the upper surface of the cylinder block 2, and the lower bolt 114 protruding from the upper end of the upper insertion hole 13n. The upper end is fastened to the fastening nut 113 and the upper nut 112. The eyebolt 111 fastened to the upper end of the upper nut 112 protrudes from the upper surface of the radiator cover 93. Therefore, since the lifting tool 11 is fixed to the cylinder block 2 and is only lightly fixed to the fan case 13 with the fastening nut 113, the fan case 13 is not loaded when the engine 1 is lifted. There is no need to increase the strength of 13. Moreover, since the lifting tool 11 is supported by the fan case 13 with the fastening nut 113, it is not necessary to separately provide a stay for supporting the lifting tool 11.

Further, since the lifting tool 11 is disposed at a position penetrating the fan case 13 and does not pass through the side surface of the radiator 9, it does not hinder the installation of the fuel tank 10 adjacent to the radiator 9. Further, since the lifting tool 11 is not fastened to the joint portion between the radiator 9 and the cylinder block 2, the sealing performance of the joint portion between the radiator 9 and the cylinder block 2 is not affected, and the cooling water does not leak.

Further, the lifting tool 11 is disposed at the rear portion of the mounting frame 13b, that is, the insertion hole such as the upper insertion hole 13n is disposed at a position near the flywheel 7 of the fan case 13. Since the flywheel 7 is a heavy object of the engine 1, it can be said that the lifting tool 11 is disposed near the center of gravity of the engine 1 in the fan case 13. Since the center of gravity of the engine 1 is near the flywheel 7 near the center of the engine 1, the lifting tool 11 is placed near the center of gravity of the engine 1 and near the center in the longitudinal direction of the upper surface of the engine 1. It is also arranged from the center in the hand direction to the flywheel 7 side.

Thus, by disposing the lifting tool 11 near the flywheel 7 that is near the center of gravity of the engine 1, the engine 1 can be lifted stably. If the arrangement of the fan case 13 in the engine 1 changes, the position of the engine case 1 near the center of gravity of the engine 1 also changes accordingly. Therefore, the position of the engine 1 near the center of gravity is limited to the rear part of the mounting frame 13b. Never happen.

Also, by providing the notch 13q, the ventilation area inside the fan case 13 can be increased, and the deterioration of the cooling performance due to passing the lifting tool 11 through the fan case 13 can be minimized. Furthermore, the fan case 13 is reduced in weight by the amount notched by the notch 13q.

<Light cover and side cover>
As shown in FIG. 1 or 2, the light cover 18 and the side covers 19 A and 19 B improve the design of the appearance, protect the welded portion of the fuel tank 10, and protect the side surfaces of the light 16 and the reflector 17. It is provided for the purpose of doing.

FIG. 8 is an enlarged perspective view of the engine 1 in which the light cover 18 and the side covers 19A and 19B are disassembled. The light cover 18 is fixed to a stay disposed on the rear surface of the engine 1 with a bolt. A hole 18 a through which the bolt 30 is passed is formed in a portion overlapping the reflector 17 and the left side cover 19 A on the left surface of the light cover 18. On the other hand, a hole 18b through which the bolt 31 is passed is formed in a portion overlapping the right side cover 19B on the right side of the light cover 18.

A lens member in which the lens 161 of the light 16 and the left and right reflectors 17 are integrated from the rear surface side is fitted into the opening 18c of the light cover 18. The left reflector 17 is formed with a hole 17 a in a portion overlapping the outside of the hole 18 a of the light cover 18.

The left side cover 19A includes a cover member 191 and a bracket 192. A plurality of rear end portions 191a of the cover member 191 are bent inward, and a hole 191b penetrating in the left-right direction is formed in the rear end portion 191a. The rear end portion 191a overlaps the inside of the light cover 18, and a hole 191b is disposed at a portion overlapping the hole 18a of the light cover 18. Then, the hole 18a of the light cover 18 is overlaid on the outside of the hole 191b of the left side cover 19A, and further the hole 17a of the reflector 17 is overlaid on the outside, and the nut 32 is disposed inside the hole 191b of the left side cover 19A. Are assembled by bolts 30 from the outside. The nut 32 may be a weld nut welded to the left side cover 19A, or a clip nut attached to the left side cover 19A.

The bracket 192 is attached to the inside near the front end of the cover member 191 by brazing or the like. The bracket 192 is formed with a hole 192a penetrating in the vertical direction. The hole 192 a is disposed so as to overlap the hole 10 a formed at the left front end portion of the seam welded portion of the fuel tank 10, and is assembled by the tapping screw 33. Instead of the tapping screw 33, a welding nut or a clip nut and a bolt may be used.

The right side cover 19B includes a cover member 191 and a bracket 192. A plurality of rear end portions 193a of the cover member 193 are bent inward, and a hole 193b penetrating in the left-right direction is formed in the rear end portion 193a. The rear end portion 193a overlaps the inside of the light cover 18, and the hole 193b is disposed at a portion overlapping the hole 18b of the light cover 18. And the hole 18b of the light cover 18 is piled up on the outer side of the hole 193b of the right side cover 19B, the nut 34 is arrange | positioned inside the hole 193b of the right side cover 19B, and it is assembled | attached with the volt | bolt 31 from the outer side of the reflector 17. The nut 34 may be a weld nut welded to the right side cover 19B, or a clip nut attached to the right side cover 19B.

The bracket 194 is attached to the inner side near the front end of the cover member 193 by brazing or the like. The bracket 194 is formed with a hole 194a penetrating in the vertical direction. The hole 194 a is disposed on the hole 10 b formed at the right front end of the seam welded portion of the fuel tank 10 and is assembled by the tapping screw 35. Instead of the tapping screw 35, a welding nut or a clip nut and a bolt may be used.

Thus, the rear end 191a of the left side cover 19A is fixed to the light cover 18 together with the reflector 17 with the bolt 30, and the rear end 193a of the right side cover 19B is fixed to the light cover 18 with the bolt 31. Further, it is not necessary to provide a mounting stay in the fuel tank 10 or the like, and the cost can be reduced. Further, since the

rear end portions

191a and 193a are covered with the light cover 18, the positioning of the light cover 18 and the side covers 19A and 19B is easy. Moreover, since the light cover 18 and the side covers 19A and 19B are connected in appearance, the appearance design is improved.

Further, since the front end portions of the left side cover 19A and the right side cover 19B are fixed inside using the

brackets

192 and 194, the fixed portion is hidden from the appearance and the design is improved. Further, by using the

holes

10a and 10b of the fuel tank 10 as the attachment destination of the bracket 192, it is not necessary to provide a mounting stay in the fuel tank or the like, and the cost can be reduced. Further, since the

holes

10a and 10b can be formed together when the fuel tank 10 is processed, the number of processes does not increase and the positional accuracy is high. Moreover, since the

holes

10a and 10b are formed at the corners of the seam welded portion, the strength is high.

The present invention can be used for an engine equipped with a lifting tool such as a horizontal water-cooled diesel engine.

1 Engine 2 Cylinder Block 9 Radiator 11 Lifting Tool 12 Cooling Fan 13 Fan Case 13n Upper Insertion Hole 13p Lower Insertion Hole 13q Notch

Claims

A cylinder block;
A radiator provided on the upper surface of the cylinder block;
A fan case provided on a side surface of the radiator and having a cooling fan;
In an engine comprising a lifting tool fixed to the upper surface of the cylinder block,
The engine, wherein the fan case has an insertion hole through which the lifting tool is inserted.
A flywheel is provided on the side of the cylinder block,
The engine according to claim 1, wherein the insertion hole is disposed at a position near the flywheel of the fan case.
The engine according to claim 1 or 2, wherein a notch for exposing the lifting tool to the cooling fan side is formed in a middle portion of the insertion hole.