JP3156146B2 - Liquid-cooled engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-cooled engine and, more particularly, to a liquid-cooled engine which can select a connecting position of a cold liquid introducing pipe or a hot liquid introducing pipe.

[0002]

2. Description of the Related Art FIG.
There are the following. As in the present invention, a radiator 117 is disposed in front of the engine body 101, a radiator inlet 133 and a radiator outlet 134 are provided in the radiator 117, and an engine cooling fan 107 is provided in front of the engine body 101. A liquid cooling jacket is provided inside 101, and a jacket inlet 135 and a jacket outlet 1 of the liquid cooling jacket are provided in front of the engine body 101.
36 are provided.

The jacket inlet 135 is connected to a radiator outlet 134 via a flexible cold liquid inlet pipe 137, and the jacket outlet 136 is connected to a radiator inlet 133 via a flexible hot liquid outlet pipe 138. The cooling liquid is forcibly circulated between the liquid cooling jacket and the radiator 117.

In the above prior art, the jacket entrance 12
The positions of the 5.136 and the radiator ports 133 and 134 cannot be changed, and there is no room for selecting the positions where the cold liquid introduction pipe 137 and the hot liquid introduction pipe 138 are connected to these.

For this reason, for example, when mounting the radiator 117 relative to the engine main body 101 at a position lower than the standard position for mounting on a machine having a low hood, or when mounting the engine main body 101 on a machine having a low mounting height. When mounting the radiator 117 relative to the engine main body 101 at a position higher than the standard position, or in order to avoid interference with the left and right walls of the bonnet, the relative position of the radiator 107 relative to the engine main body 101 is set to the left and right from the standard position. When the relative arrangement of the engine body 101 and the radiator 107 changes from the reference arrangement, for example, the length of the cold liquid introduction pipe 137 and the hot liquid discharge pipe 138 may be insufficient. Further, they may be forcibly bent.

[0006]

In the above prior art, when the relative arrangement of the engine body 101 and the radiator 117 changes from the standard arrangement, the lengths of the cold liquid introduction pipe 137 and the hot liquid discharge pipe 138 may be insufficient. Therefore, it is necessary to prepare a plurality of pipes having different lengths as these pipes, which complicates parts management. In addition, due to the change in the relative arrangement, the cold liquid introduction pipe 137 and the hot liquid outlet pipe 138 may be forcibly twisted, obstructing the circulation of the cooling liquid, and reducing the cooling efficiency.

[0007] It is an object of the present invention to provide a liquid-cooled engine capable of selecting a connection position of a cold liquid introduction pipe or a hot liquid introduction pipe.

[0008]

According to the present invention, as shown in FIG. 1, a radiator 17 is disposed in front of an engine body 1, and a radiator inlet 33 and a radiator outlet 34 are provided in the radiator 17. The engine cooling fan 7 is provided at the front of the engine body 1, the liquid cooling jacket is provided inside the engine body 1, the jacket inlet 35 and the jacket outlet 36 of the liquid cooling jacket are provided at the front part of the engine body 1, and the jacket inlet 35 is provided. Flexible liquid introduction pipe 37
To the radiator outlet 34 via a radiator outlet, and the jacket outlet 36 to the radiator inlet 33 via a flexible hot liquid outlet pipe 38 to force the coolant to circulate between the liquid cooling jacket and the radiator 17. The liquid-cooled engine thus configured is characterized as follows.

That is, at least one of the jacket entrances 35 and 36 and the radiator entrances 33 and 34 is provided in the pipe connector 39 and the pipe connector 3 is provided.
By configured to be switched 9 into a plurality of orientation, of the cold liquid inlet pipe 37 and the hot liquid outlet pipe 38, as well as to select a position for connecting at least one of the pipe 38 to the pipe fitting 39 , Clan
A drive wheel 10 is attached to the front end 9 of the
A plurality of rotating shafts 11 and 12 having different heights at the front of 1
Are provided, and the plurality of driven wheels 13.1
4 is driven by driving wheels 10, and a plurality of driven wheels 1
Fan mounting seats 15 and 16 are provided on 3 and 14, respectively.
Select one of the driven wheels 13 and 14 and
The cooling fan 7 is configured to be attached thereto.

[0010]

According to the present invention, for example, the radiator 1 with respect to the engine body 1 is mounted on a machine having a low hood.
When the relative position of the radiator 17 is lower than the standard position, or when the radiator 17 is positioned higher than the standard position with respect to the engine body 1 for mounting on a machine having a low mounting height of the engine body 1. When the relative position of the radiator 17 with respect to the engine body 1 is deviated from the standard position to the left or right to avoid interference with the left and right walls of the hood, the relative arrangement between the engine body 1 and the radiator 17 changes from the reference arrangement. If you do, pipe fitting 3
By switching the position of the position 9 and selecting the connection positions of the cold liquid introduction pipe 37 and the hot liquid introduction pipe 38, the shortage of these lengths is eliminated, and these unreasonable twists are alleviated. One of a plurality of driven wheels 13 and 14 with different heights
Select and cool the fan mounting seats 15 and 16
By installing the cooling fan 7, the engine cooling fan
The mounting height of the button 7 can be selected.

[0011]

According to the present invention, when the relative arrangement between the engine body and the radiator changes from the reference arrangement, the posture of the pipe connector is switched to select the connection position of the cold liquid introduction pipe or the hot liquid introduction pipe. By doing so, it is possible to solve the shortage of these lengths, so that it is sufficient to prepare a single kind of these pipes, and the parts management thereof is simplified.

In addition, since excessive twisting of these pipes can be reduced, the circulation of the cooling liquid is not hindered, and the cooling efficiency can be maintained high. Also, for example, a machine with a low bonnet
Also reduce the mounting height of the engine cooling fan 7 and
Engine cooling fan 7 and radiator 1
7 to avoid interference,
Can be mounted without any trouble. On the other hand, the engine body
Engine cooling fan for machines with low mounting height
7 mounting height, and the engine room floor
Avoid interference of gin cooling fan 7 and radiator 17
By doing so, the engine can be mounted without trouble.
Wear. Thus, the mounting height of the engine cooling fan 7
You can choose the size of the engine
The number of types of machines increases, and the range of use of engines expands.

[0013]

An embodiment of the present invention will be described with reference to the drawings.
1 to 3 are views for explaining a liquid-cooled diesel engine according to an embodiment of the present invention.

As shown in FIG. 1, the engine body 1 has a cylinder head 3 mounted on an upper part of a cylinder block 2, a head cover 4 mounted on an upper part of the cylinder head 3, and an oil pan 5 mounted on a lower part of the cylinder block 2. The gear case 6 is assembled at the front of the cylinder block 2. An engine cooling fan 7 and a wrapping transmission 8 are provided at the front of the engine body 1.

In this embodiment, the following configuration is provided so that the mounting height of the engine cooling fan 7 can be selected. That is, as shown in FIG. 2, a drive wheel 10 is attached to a front end 9 of a crankshaft, and a plurality of driven wheels 13 and 14 having different heights of respective rotation center shafts 11 and 12 are provided at a front portion of the engine body 1. The driven wheels 13 and 14 are provided to be driven by the driving wheels 10. The fan mounting seats 15 and 16 are provided on the plurality of driven wheels 13 and 14 respectively, and the plurality of driven wheels 13 and 14 are provided.
The engine cooling fan 7 can be installed by selecting one of the fourteen.

According to such a configuration, one of the plurality of driven wheels 13 and 14 having different heights is selected, and the engine cooling fan 7 is mounted on the fan mounting seats 15 and 16 thereof. You can select the mounting height. For this reason, for example, even in a machine having a low bonnet, the engine cooling fan 7 is installed at a low height, and the engine cooling fan 7 and the radiator 17 are prevented from interfering with the top plate of the bonnet. Can be mounted.

On the other hand, even in a machine in which the mounting height of the engine body 1 is low, the mounting height of the engine cooling fan 7 is increased to prevent the engine cooling fan 7 and the radiator 17 from interfering with the floor of the engine room. The engine can be mounted without any trouble. As described above, since the mounting height of the engine cooling fan 7 can be selected, the types of machines on which the engine can be mounted increase, and the range of use of the engine is widened.

The above configuration will be specifically described as follows. That is, a pair of driven wheels 13 and 14 are provided,
Four bolt holes 18 are respectively formed on the front surfaces of the driven wheels 13 and 14, and the front surfaces are formed as fan mounting seats 15 and 16. Rotation center axis 11 of upper driven wheel 13
Is shared with a coolant circulation pump shaft for circulating coolant. The rotation center shaft 12 of the lower driven wheel 14 is attached to the gear case 6 via a bracket (not shown).
Also, as shown in FIG. 1, a pair of drive wheels 10 are provided,
These are externally fitted and fixed to the front end 9 of the crankshaft.
A pair of driven wheels 13 and 14 are paired with a pair of wrapping transmission bands 19.2.
The drive wheel 10 is wound and transmitted by a pair of drive wheels 10.

As shown in FIG. 2, the lower driven wheel 14
When the engine cooling fan 7 is attached to the engine (see the chain line), the turning area of the engine cooling fan 7 is viewed from the direction parallel to the axis 21 of the crankshaft, and the front power take-out of the front end 9 of the crankshaft. When the engine cooling fan 7 is attached to the upper driven wheel 13 but overlaps with the shaft 22 (see the broken line), the engine cooling fan 7
Is not overlapped with the front power take-out shaft 22.

For this reason, when the engine is mounted on a machine using the front power take-off shaft 22, the upper driven wheel 13
The engine cooling fan 7. As shown in FIG. 1, since the upper driven wheel 13 is disposed after the lower driven wheel 14, the upper driven wheel 13 is provided with the engine cooling fan 7.
Is mounted on the fan mounting seat 15 of the driven wheel 13 via a spacer.

The pair of driven wheels 13 and 14 and a tension wheel 23 to be described later are provided with a plurality of types having different diameters, and are interchangeable. For this reason, if a large-diameter one is selected in winter and the engine cooling fan 7 is attached thereto, the number of revolutions of the engine cooling fan 7 decreases, and overcooling of the engine can be suppressed. In the summer, when a small-diameter fan is selected and the engine cooling fan 7 is attached thereto, the number of revolutions of the engine cooling fan 7 increases and overheating of the engine can be suppressed.

In this embodiment, a pair of tension mounting seats 24 and 25 are disposed at the front of the engine body 1 so as to be divided into right and left, and tension devices 26 and 27 are detachably mounted on the tension mounting seats 24 and 25, respectively. The tension is applied to each of the winding transmission bands 19 and 20 by the tension devices 26 and 27, and a dynamo is used for one tension device 27. Then, in order to be able to select the right and left arrangement of the tension device 27 using this dynamo, each tension device 26
Can be attached to either of the pair of tension attachment seats 24 and 25.

According to such a configuration, one of the left and right tension mounting seats 26 and 27 is selected, one of the tension mounting devices is mounted, and the other tension mounting seat is mounted on the other tension mounting seat. By attaching a tension device, each tension device 26.2.
7 can be selected.

For this reason, by attaching the dynamo tension device 27 to the side not approaching the peripheral equipment, it is possible to secure a space for maintenance of the dynamo. Further, since the oil supply port 31, the oil filter cartridge 32 and the like are arranged on the left side of the engine main body 1, if the tension device 27 using a dynamo is arranged on the left side of the engine main body 1, these maintenances are performed on the left side of the engine. Can be performed in a lump. As described above, the right and left arrangement of the tension device using the dynamo requiring maintenance can be selected according to the type of the machine on which the engine is mounted, so that the types of the machines on which the engine can be mounted increase and the range of use of the engine is widened. Also, maintenance becomes easy.

The above configuration is specifically described as follows. That is, as shown in FIG.
When the tension device 27 using a dynamo is attached to the right side when viewed from the front of the gear case 6, the base end of the tension device 27 is detachably attached to the right tension mounting seat 25 protruding from the right side of the gear case 6 with a bolt. The swing guide plate 28 is pivotally supported, and is detachably attached to the cylinder head 3 with bolts. The tip of a tension device 27 is detachably fixed to the swing guide plate 28 with bolts. Is maintained in the swinging posture. The lower portion of the arm 29 of the tension device 26 without using a dynamo is detachably fixed to a left tension mounting seat 24 mounted on the left side of the gear case 6 with a bolt, and the tension device 26 is set in a predetermined swing posture. Will be maintained.

On the other hand, as shown in FIG.
When a tension device 27 using a dynamo is attached to the left side when viewed from the front of the device, the lower part of the arm 29 of the tension device 26 that does not use the dynamo is fixed to the right tension attachment seat 25 in a detachable manner by bolts. The device 26 is maintained in a predetermined rotation posture. The base end of a tension device 27 using a dynamo is detachably attached to the left tension attachment seat 24, and a swing guide plate 28 is detachably attached to the left side of the engine body 1 with bolts. The tip of the tension device 27 is detachably fixed to the guide plate 28 with bolts,
The tension device 27 is maintained in a predetermined swing posture. The front surface of the tension wheel 23 of the tension device 27 using the dynamo is a fan mounting seat 30, which can be selected to mount the engine cooling fan 7.

When a dynamo is used for both of the tension devices 26 and 27, a dynamo with a higher maintenance frequency is attached to a side that does not come close to the peripheral devices, so that a dynamo with a higher maintenance frequency is installed. Space for the maintenance of the system can be secured. When the oil supply port 31, the oil filter cartridge 32, and the like are arranged on one of the left and right sides, a dynamo tension device with high maintenance frequency is arranged on the side where the oil supply port 31 and the oil filter cartridge 32 are arranged. You can do it.

The configuration of the water cooling device of this embodiment is as follows. That is, as shown in FIG. 1, the radiator 17 is disposed in front of the engine body 1, the radiator 17 is provided with a radiator inlet 33 and a radiator outlet 34, and the engine cooling fan 7 is provided at a front part of the engine body 1. A liquid cooling jacket (not shown) is provided inside the engine body 1, and a jacket inlet 35 and a jacket outlet 36 of the liquid cooling jacket are provided at the front of the engine body 1. The jacket inlet 35 is a flexible cold liquid introduction pipe 3
7 and a radiator outlet 34, a jacket outlet 36 communicates with a radiator inlet 33 via a flexible hot liquid outlet pipe 38, and the liquid cooling jacket and the radiator 17
The coolant is forced to circulate between the two. Water is used for the cooling liquid.

In this embodiment, the jacket outlet 3 is provided so that the connecting position of the hot liquid introduction pipe 38 can be selected.
6, a pipe connector 39 is provided.
9 can be switched to a plurality of postures. Thereby, the position at which the hot liquid outlet pipe 38 is connected to the pipe connector 39 can be selected.

According to such a configuration, for example, in order to mount the radiator 17 on the machine having a low hood, the relative position of the radiator 17 with respect to the engine main body 1 is set lower than the standard position. In order to mount the radiator 17 with respect to the engine main body 1 higher than the standard position for mounting on a machine with a low height, or to avoid interference with the left and right walls of the bonnet, When the relative position between the engine body 1 and the radiator 17 changes from the reference position, such as when the relative position is deviated left and right from the standard position, the posture of the pipe connector 39 is switched, and the connection position of the hot water outlet pipe 38 is changed. By selecting, the shortage of the length is eliminated, and the unreasonable twist is reduced.

As described above, when the relative arrangement between the engine body 1 and the radiator 17 changes from the reference arrangement, the posture of the pipe connector 39 is switched, and the connection position of the hot liquid outlet pipe 38 is selected. Since the shortage of the length can be eliminated, it is sufficient to prepare a single kind of hot liquid outlet pipe 38, and the parts management thereof is simplified. In addition, since excessive twisting of the hot liquid outlet pipe 38 can be alleviated, circulation of the cooling liquid is not hindered, and high cooling efficiency can be maintained.

The above configuration will be specifically described. The radiator 17 is supported by a bracket 49 projecting forward from both left and right sides of the cylinder block 2. The radiator inlet 33 is provided in the upper tank 40, and the radiator outlet 34 is provided in the lower tank 41, respectively. The liquid cooling jacket includes a cylinder jacket provided inside the cylinder block 2 and a head jacket provided inside the cylinder head 3, and these are communicated with each other. The jacket inlet 35 is provided in the gear case 6 and communicates with the cylinder jacket via a coolant circulation pump.

The case 42 also serves as a thermostat case, and can be turned over by connecting either of the openings 44 and 45 to the jacket outlet 36.
The non-connection side is closed by a lid 48. Also, the case 42
Is rotatable at a predetermined pitch along the seating surface of the jacket outlet 36, and the connection pipe 43 is led out in a direction inclined with respect to the rotation center axis 50. For this reason, the posture of the pipe connector 39 can be selected by the number of combinations of the inversion and the rotation pitch, and based on this, the connection position of the hot liquid outlet pipe 38 to the pipe connector 39 can be selected. it can.

That is, the connector mounting bolts 46 are provided on the case 42 and the lid 48 at a pitch of 120 ° in the circumferential direction.
Are detachably inserted, and as shown in FIG.
Six bolt mounting holes 47 are formed in the jacket outlet 36 at a pitch of 60 ° in the circumferential direction, and the case 42 and the lid 48 are fastened together by the connecting tool mounting bolts 46 screwed into the bolt mounting holes 47. Have been. For this reason,
As shown in FIG. 1 (D), six rotation postures of the pipe connector 39 can be selected at a pitch of 60 °, and the rotation posture is multiplied by the two inversions shown in FIGS. 1 (A) and 1 (C). , Total 1
Two types of postures can be selected. According to such a configuration, the pipe connector 39 can have a simple structure, and
Even if the posture of the pipe connector 39 is changed, liquid leakage hardly occurs.

The pipe connector 39 is provided between the jacket ports 35 and 36 and the radiator ports 33 and 34.
By providing at least one opening, the shortage of the lengths of the cold liquid introduction pipe 37 and the hot liquid introduction pipe 38 can be eliminated, and excessive twisting can be reduced.

Although the contents of the embodiments of the present invention are as described above, the present invention is not limited to the above embodiments. For example, the type of the engine is not limited to the water-cooled type, and may be an oil-cooled type or another liquid-cooled type, and is not limited to a diesel engine, and may be a gasoline or other spark ignition type.

[Brief description of the drawings]

FIG. 1 is a view for explaining a liquid cooling device for an engine according to an embodiment of the present invention. FIG. 1 (A) is a side view of an engine front part, and FIG.
1B is a cross-sectional view taken along the line BB of FIG. 1A, FIG. 1C is a view in which the pipe fitting of FIG. 1A is inverted, and FIG. 1D is a plan view of the pipe fitting. It is.

FIG. 2 is a front view of the engine of FIG.

FIG. 3 is a front view of the engine of FIG. 1 in which the right and left arrangement of the tension device is changed.

FIG. 4 is a side view of a front part of an engine according to the related art.

[Explanation of symbols]

1 ... engine body, 7 ... engine cooling fan, 9 ...
Front end of link shaft, 10 ... drive wheel, 11 ・ 12 ... rotation center
Shaft, 13/14 ... driven wheel, 15/16 ... fan mounted
Seat, 17: Radiator, 33: Radiator entrance, 34 ...
Radiator outlet, 35 ... jacket inlet, 36 ... jacket outlet, 37 ... cold liquid introduction pipe, 38 ... hot liquid outlet pipe, 39 ... pipe connector.

Claims (1)

(57) [Claims] A radiator is provided in front of an engine body (1).
The radiator (17) is provided with a radiator inlet (33) and a radiator outlet (34).
An engine cooling fan (7) is provided at the front of (1), and a liquid cooling jacket is provided inside the engine body (1).
At the front of (1), a jacket inlet (35) and a jacket outlet (36) of a liquid cooling jacket are provided, and a jacket inlet (35) is provided.
To a radiator outlet (34) via a flexible cold liquid inlet pipe (37), and a jacket outlet (36) to a radiator inlet (33) via a flexible hot liquid outlet pipe (38). In a liquid-cooled engine configured to communicate and forcibly circulate a coolant between a liquid-cooled jacket and a radiator (17), a jacket inlet / outlet (35) / (36) and a radiator inlet / outlet are provided.
Of the (33) and (34), at least one port (36) is provided with a pipe connector (39) so that the pipe connector (39) can be switched to a plurality of positions, so that the cold liquid The position at which at least one of the inlet pipe (37) and the hot liquid outlet pipe (38) is connected to the pipe connector (39) can be selected , and the front end (9) of the crankshaft can be selected. Attach the drive wheel (10) to the
The rotation center shafts (11) and (12)
A plurality of driven wheels (13) and (14) having different heights are provided.
A plurality of driven wheels (13) and (14) are driven by driving wheels (10).
To each of the driven wheels (13) and (14).
Providing fan mounting seats (15) and (16),
Select one of (13) and (14) to
A liquid-cooled engine, characterized in that the engine (7) can be mounted .