JPH108956A - Engine water-cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount inlet and exhaust pipes on the wall of a cylinder head and improve inlet and exhaust efficiency and output performance by providing an positioning reference plane in an engine and facing a water pump to the reference plane via a guide material so as to be arranged apart from the wall of the cylinder head. SOLUTION: A flywheel 2 and a pump output pulley 3 are arranged on one side of a crank case 1 for an engine E and a transmission belt 6 is wound on the output wheel 3 and an input pulley 5 for a water pump 4. With the operation of the water pump 4, cooling water is circulated between a water jacket for the engine E and a radiator 7 through a hot water passage 27, a cool water suction passage 28 and a cool water discharge passage 29. In this case, a positioning reference plane 8 is provided for the engine E, a guide material 9 is faced to the reference plane 8, the water pump 4 is faced to the guide material 9 and the water pump 4 is arranged apart from the wall 11 of a cylinder head 10, so that inlet and exhaust pipes 13, 14 can be mounted on the wall 11 to improve inlet and exhaust efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a water cooling device for an engine.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional water cooling system for an engine. This has the following basic structure as in the present invention. That is, the crankcase 1
01, the flywheel 102 and the pump output wheel 10
3 and the pump output wheel 103 and the water pump 1
The transmission belt 106 is wound around the input wheel 105 of the engine 04 and the water pump 104 is operated to circulate the cooling water between the water jacket of the engine E and the radiator 107.

In this prior art, the crankcase 101
Since the large flywheel 102 is located on one side of the crankcase 105, there is no space for disposing the input wheel 105 of the water pump 104 on one side of the crankcase 105, and the water pump 104 is mounted on the wall surface 111 of the cylinder head 110. I have.

[0004]

In the prior art, since the water pump 104 is mounted on the wall surface 111 of the cylinder head 110, the intake pipe 113 and the exhaust pipe 114 cannot be mounted on the wall surface 111. , The intake / exhaust efficiency may be low, and the output performance may be low.

An object of the present invention is to provide a water cooling device for an engine which can solve the above-mentioned problems.

[0006]

[Means for Solving the Problems]

(First invention) As shown in FIGS. 1 and 2,
A flywheel 2 and a pump output wheel 3 are disposed on one side of a crankcase 1.
The transmission band 6 is wound around the input wheel 5 of the engine E and the water jacket of the engine E and the radiator 7
A water cooling device for an engine in which cooling water is circulated between the cooling water and the cooling water is characterized as follows.

That is, a reference surface 8 for positioning is provided on the engine E, a guide member 9 is attached to the reference surface 8, a water pump 4 is attached to the guide member 9, and a cylinder head 1 is provided.
The water pump 4 is disposed apart from the wall surface 11 of the pump output wheel 3, and the output wheel 3 for the pump is
The attitude of the input wheel 5 of the water pump 4 with respect to is determined.

(Second Invention) In a second invention, a flywheel 2 and a pump output wheel 3 are arranged on one side of a crankcase 1 as shown in FIGS. A transmission band 6 is wound around an input wheel 5 of the water pump 4 and the water pump 4 is operated to circulate cooling water between the water jacket of the engine E and the radiator 7. It is characterized by the following.

That is, a reference surface 8 for positioning is provided on the engine E, a guide arm 12 is led out from the water pump 4, the guide arm 12 is attached to the reference surface 8, and the water pump 4 are spaced apart from each other, and the attitude of the input wheel 5 of the water pump 4 with respect to the pump output wheel 3 is determined via the reference surface 8 and the guide arm 12.

(Third Invention) According to a third invention, in the second invention, as shown in FIG.
The flange 15 and the holding plate 17 are fastened together with flange fastening bolts 16 for fixing the flange 15 of the intake pipe 13 or the exhaust pipe 14 to the wall surface 11 of the cylinder head 10, and the holding plate 17 and the guide arm 12 and the cylinder head 10 together with the arm fastening bolt 18, and the guide arm 12 is
Characterized by being sandwiched.

(Fourth Invention) In a fourth invention, as shown in FIG. 6, a flywheel 2 and a pump output wheel 3 are arranged on one side of a crankcase 1, and the pump output wheel 3 and a water pump are provided. A transmission band 6 is wound around the input wheel 5 of the engine 4 and the water pump 4 is operated to circulate the cooling water between the water jacket of the engine E and the radiator 7. It is characterized by doing so.

That is, either the intake pipe 13 or the exhaust pipe 14 and the water pump 4 are integrated, and the seating surface of the intake pipe 13 or the exhaust pipe 14 is used as a reference plane 8 for positioning. The position of the input wheel 5 of the water pump 4 with respect to the pump output wheel 3 is determined via the pump 13 or the exhaust pipe 14.

[0013]

Actions and effects of the present invention

(First or Second Invention) In the first or second invention, the following functions and effects are obtained (see FIGS. 1 and 2 or FIGS. 3 to 5). Since the water pump 4 is not mounted on the wall 11 of the cylinder head 10, the intake pipe 13 or the exhaust pipe 14
Can be attached, and due to these free arrangements,
The intake and exhaust efficiency can be increased, and the output performance can be enhanced.

Since the attitude of the input wheel 5 of the water pump 4 with respect to the output wheel 3 for the pump can be made appropriate, the disengagement of the transmission band 6
Damage to the pump output wheel 3 and the input wheel 5 of the water pump 4 can be prevented.

(Third Invention) In the third invention, in addition to the above-described functions and effects, the following functions and effects are also obtained (see FIG. 5). The input wheel 5 of the water pump 4 is positioned more accurately, the accuracy of optimizing the posture of the input wheel 5 of the water pump 4 with respect to the pump output wheel 3 is further increased, the transmission band 6 is disengaged, and the pump output wheel 3 Damage to the input wheel 5 of the water pump 4 can be more reliably prevented.

(Fourth invention) In the fourth invention, in addition to the above-mentioned effects, the following effects are also obtained (see FIG. 6). Since the intake pipe 13 or the exhaust pipe 14 and the water pump 4 are integrated, the number of parts is reduced by that much, the parts management is simplified, and the number of assembling steps is reduced.

[0017]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view for explaining a first embodiment of the present invention. In the first embodiment, a horizontal water-cooled engine is used. The configuration of the engine E is as follows. The cylinder head 10 is mounted on a cylinder block 19 having the crankcase 1, and a head cover 20 is mounted on the cylinder head 10. A starter 21 is arranged on the crankcase 1. This engine E is a base 2
It is fixed on 2.

The structure of the water cooling device of the engine E is as follows. That is, as shown in FIG. 1A, a flywheel 2 and a pump output wheel 3 are provided on one side of a crankcase 1.
The transmission band 6 is wound around the output wheel 3 for the pump and the input wheel 5 of the water pump 4, and the operation of the water pump 4 allows cooling water to flow between the water jacket of the engine E and the radiator 7. It is circulated. The flywheel 2 and the pump output shaft 3 are fixed to a crankshaft 23. The water jacket is formed continuously over the inside of the cylinder block 19 and the inside of the cylinder head 10. A hot water passage 27 is provided between the cylinder block 19 and the radiator 7, a cold water suction passage 28 is provided between the radiator 7 and the water pump 4, and between the water pump 4 and the cylinder head 10. Is provided with a cold water discharge passage 29. The cooling water in the cylinder block 19 circulates in the order of the radiator 7, the water pump 4, and the cylinder head 10.

In this embodiment, a reference surface 8 for positioning is provided on the engine E, a guide member 9 is attached to the reference surface 8, a water pump 4 is attached to the guide member 9, and a wall surface of the cylinder head 10 is provided. The water pump 4 is arranged at a distance from the reference 11, and the attitude of the input wheel 5 of the water pump 4 with respect to the pump output wheel 3 is determined via the reference surface 8 and the guide member 9.

According to such a configuration, since the water pump 4 is not mounted on the wall surface 11 of the cylinder head 10, the intake pipe 13 or the exhaust pipe 14 can be mounted on the wall surface 11, and by these free arrangements, The intake and exhaust efficiency can be increased, and the output performance can be enhanced. In addition, since the attitude of the input wheel 5 of the water pump 4 with respect to the output wheel 3 for the pump can be made appropriate, it is possible to prevent the transmission belt 6 from coming off and prevent the output wheel 3 for the pump and the input wheel 5 of the water pump 4 from being damaged.

As shown in FIG. 2, in the first embodiment, a vertical surface formed below the wall surface 11 of the cylinder head 10 is used as the reference surface 8, and an L-shaped fitting is used as the guide member 9. The guide member 9 includes a vertical portion 9a and a horizontal portion 9b, and the horizontal portion 9b is placed on the base 22, and the vertical portion 9a
Is attached to the reference surface 8, the posture of the guide member 9 is adjusted, the vertical portion 9a is fixed to the reference surface 8, the horizontal portion 9b is fixed to the base 22, and the posture of the guide member 9 is determined. Then, the water pump 4 is placed on the base 22, and the vertical guided surface 24 (see FIG. 1B) provided at the lower portion of the water pump 4 is provided on the horizontal portion 9 b of the guide member 9. 9c to make the attitude of the input wheel 5 of the water pump 4 with respect to the pump output wheel 3 appropriate. That is, in plan view, each groove of the output wheel 3 for the pump and the input wheel 5 of the water pump 4 and the transmission belt 6
And are arranged in a straight line.

The water pump 4 slides under the guidance of the guide member 9 so that the distance between the pump output wheel 3 and the input wheel 5 of the water pump 4 can be adjusted. The water pump 4 can be fixed at a predetermined slide position by a bolt nut 26 inserted through the long hole 25 of the base 22. For this reason, the transmission belt 6 without the tension roller is used.
The tension of can be adjusted.

In the second embodiment shown in FIGS. 3 and 4, instead of using the guide member 9, the guide arm 1 is moved from the water pump 4.
The guide arm 12 is attached to the reference surface 8. Thereby, the water pump 4 is disposed apart from the wall surface 11 of the cylinder head 10, and the positions of the pump output wheel 3 and the input wheel 5 of the water pump 4 are determined via the reference surface 8 and the guide arm 12. It is. This second
The embodiment also has the same functions as the first embodiment.

As the reference plane 8, as in the first embodiment,
A vertical surface formed below the wall surface 11 of the cylinder head 10 is used. The guide arm 12 is formed integrally with the water pump 4, has a long hole 30 at the tip thereof, and the tip of the guide arm 12 is fixed to the reference surface 8 by a bolt 31 inserted through the long hole 30. The other configuration is the same as that of the first embodiment. In FIGS. 3 and 4, the same elements as those of the first embodiment are denoted by the same reference numerals.

In the third embodiment shown in FIG. 5, in the second embodiment shown in FIG. 3 and FIG.
The flange 15 and the holding plate 17 are jointly fastened with a pair of flange fastening bolts 16 for fixing the flange 15 of the exhaust pipe 14 to the wall surface 11 of the cylinder head 10. Are pressed together with the cylinder head 10 by arm fastening bolts 18, and the guide arm 12 is sandwiched between the holding plate 17 and the reference surface 8. According to such a configuration, the input wheel 5 of the water pump 4 is more accurately positioned, and the accuracy of optimizing the posture of the input wheel 5 of the water pump 4 with respect to the pump output wheel 3 is further increased. Missing, pump output wheel 3 or water pump 4
The input wheel 5 can be more reliably prevented from being damaged.

The guide arm 12 is fixed to the holding plate 17 with a reinforcing bolt 32. Slot 1 of guide arm 12
The guide arm 12 can be slid by inserting the arm fastening bolt 18 through the hole 2a and the reinforcing bolt 32 through the elongated hole 17a of the holding plate 17. Other configurations are the same as those of the second embodiment. In FIG. 5, the same elements as those of the second embodiment are denoted by the same reference numerals.

In the fourth embodiment shown in FIG. 6, the exhaust pipe 14 and the water pump 4 are integrated, and the seating surface of the exhaust pipe 14 is used as a reference plane 8 for positioning. The attitude of the input wheel 5 of the water pump 4 with respect to the pump output wheel 3 is determined via this. Other structures are the same as in the first embodiment. 6, the same elements as those in the first embodiment are denoted by the same reference numerals. Instead of the exhaust pipe 14, the intake pipe 13 and the water pump 4 may be integrated. This fourth
In the embodiment, since the intake pipe 13 or the exhaust pipe 14 and the water pump 4 are integrated, the number of parts is reduced by that much, the parts management is simplified, and the number of assembling steps is reduced.

[Brief description of the drawings]

FIG. 1 is a view for explaining a horizontal water-cooled engine according to a first embodiment, where FIG. 1 (A) is a plan view and FIG. 1 (B) is FIG. 1 (A).
1B is a sectional view taken along line BB of FIG. 1, and FIG. 1C is a sectional view taken along line CC of FIG. 1B.

FIG. 2 is a side view of the horizontal water-cooled engine according to the first embodiment.

3A and 3B are diagrams illustrating a horizontal water-cooled engine according to a second embodiment, wherein FIG. 3A is a plan view and FIG. 3B is FIG. 3A.
3B is a sectional view taken along line BB, and FIG. 3C is a sectional view taken along line CC in FIG. 3B.

FIG. 4 is a side view of a horizontal water-cooled engine according to a second embodiment.

5A and 5B are diagrams illustrating a horizontal water-cooled engine according to a third embodiment, where FIG. 5A is a partial side view, and FIG.
It is a BB sectional view taken on the line of (A).

6A and 6B are diagrams illustrating a horizontal water-cooled engine according to a fourth embodiment, where FIG. 6A is a partial side view, and FIG.
It is a BB sectional view taken on the line of (A).

FIG. 7 is a plan view of a horizontal water-cooled engine according to the related art.

[Explanation of symbols]

E: engine, 1 ... crankcase, 2 ... flywheel, 3 ... pump output wheel, 4 ... water pump, 5 ... input wheel,
Reference numeral 6: transmission band, 7: radiator, 8: reference surface, 9: guide material, 10: cylinder head, 11: wall surface, 12: guide arm, 13: intake pipe, 14: exhaust pipe, 15: flange, 16: flange Fastening bolt, 17 ... holding plate, 18
... Arm fastening bolt.

Claims (4)

[Claims] A flywheel (2) and an output wheel (3) for a pump are arranged on one side of a crankcase (1), and the output wheel (3) for a pump and the input wheel (4) of a water pump (4) are arranged. 5) and transmission belt (6)
And a water pump (4) is operated to circulate cooling water between the water jacket of the engine (E) and the radiator (7). A reference surface (8) for alignment is provided, and a guide member (9) is attached to the reference surface (8).
With a water pump (4) and the wall of the cylinder head (10)
The water pump (4) is arranged apart from (11), and the pump output wheel (3) is arranged via the reference surface (8) and the guide member (9).
The attitude of the input wheel (5) of the water pump (4) with respect to the engine is determined. 2. A flywheel (2) and a pump output wheel (3) are arranged on one side of a crankcase (1), and the pump output wheel (3) and an input wheel (4) of a water pump (4) are arranged. 5) and transmission belt (6)
And a water pump (4) is operated to circulate cooling water between the water jacket of the engine (E) and the radiator (7). A reference surface (8) for alignment is provided, a guide arm (12) is derived from the water pump (4), and the guide arm (12) is attached to the reference surface (8), and a cylinder head is provided.
The water pump (4) is arranged apart from the wall surface (11) of (10), and the water pump (4) is connected to the pump output wheel (3) via the reference surface (8) and the guide arm (12). Input wheel (5)
Water cooling system for an engine, wherein the attitude of the engine is determined. 3. A water cooling system for an engine according to claim 2, wherein the reference surface is formed on a wall surface of the cylinder head.
(11), and a flange (15) and a holding plate with a flange fastening bolt (16) for fixing the flange (15) of the intake pipe (13) or the exhaust pipe (14) to the wall surface (11) of the cylinder head (10). (17), and the holding plate (17) and the guide arm (12) are squeezed together to the cylinder head (10) with the arm fastening bolt (18), and the holding plate (17) and the reference surface (8) are tightened. ), A guide arm (12) sandwiched therebetween. 4. A flywheel (2) and a pump output wheel (3) are arranged on one side of a crankcase (1), and the pump output wheel (3) and an input wheel (4) of a water pump (4) are arranged. 5) and transmission belt (6)
In the water cooling system of the engine, the cooling water is circulated between the water jacket of the engine (E) and the radiator (7) by the operation of the water pump (4). One of exhaust pipes (14) and water pump
(4), and the seating surface of the intake pipe (13) or the exhaust pipe (14) is used as a reference plane (8) for positioning.
The attitude of the input wheel (5) of the water pump (4) with respect to the pump output wheel (3) is determined via (8) and the intake pipe (13) or the exhaust pipe (14). Engine water cooling system.