JPH0842341A - Fan attaching structure - Google Patents

Abstract

PURPOSE:To increase the degree of freedom of a fan layout by providing an arm member on a bracket for an auxiliary machine attached to an internal combustion engine, and making this arm member support a fan pulley on which a cooling fan is to be attached. CONSTITUTION:An air conditioner compressor 10 as one of the auxiliary machines of an internal combustion engine 2 is supported on an air conditioner bracket 46 to be attached to a cylinder block 4, and as a bracket for auxiliary machines, and an arm member 48 is attached to this bracket 46. A fan pulley 84 is pivotally mounted on the other end side of the arm member 48 through a bearing, and a fan 94 is attached to this fan pulley 84. The fan pulley 84 is rotated by transmitting power through a fan belt 98 laid between it and a crank pulley 96 provided on a crankshaft 16. By this arrangement structure, the fan 94 can be arranged without being affected by the position of a water pump shaft of a water pump 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan mounting structure, and in particular, the degree of freedom in fan layout can be increased.
Fan mounting that can avoid interference with covers, belts, etc., can share the cylinder block of the internal combustion engine, can also function as a tensioner, can eliminate the need for a tensioner, and can also achieve weight reduction Regarding the structure.

[0002]

2. Description of the Related Art An internal combustion engine is provided with various accessories to ensure engine performance. For example, as shown in FIGS. 5 and 6, the internal combustion engine 102 has a cylinder block 104.
Further, for example, a water pump 106, an alternator 108, and the like are attached as accessories.

The internal combustion engine 102 has a crankshaft 110 for driving auxiliary equipment such as the water pump 106.
The auxiliary equipment crank pulley 112 is provided. In the water pump 106, a water pump shaft 114 is provided with a water pump pulley 116. In addition, the alternator 108 is provided with an alternator pulley 120 on an alternator shaft 118.

A belt 122 for accessories is wound around the crank pulley 112 for accessories, the water pump pulley 116, and the alternator pulley 120. This allows
The auxiliary equipment such as the water pump 106 is the belt 12 for the auxiliary equipment.
It is driven by the crankshaft 110 via 2.

In the water pump 106, a water pump case 124 is attached to the cylinder block 104 by a pump attaching bolt 126, and a water pump shaft 114 is attached.
Are supported by bearings 128. Water pump shaft 1
A pulley sheet 130 is fixed to the tip of 14 by press fitting. A cooling fan 132 is attached to the pulley seat 130 via a water pump pulley 116 with a fan attachment bolt 134.

As a result, the fan 132 is driven together with the water pump 106 to supply the cooling air to the internal combustion engine 102.

Such a fan mounting structure is disclosed in Japanese Utility Model Publication No. 62-183022, Japanese Utility Model Publication No. 1-115838.
Publication, Japanese Utility Model Publication No. 2-127734, Japanese Utility Model Publication 3-4
There is one disclosed in Japanese Patent No. 5422.

In Japanese Utility Model Laid-Open No. 62-183022, a fan drive shaft and a fan fixing member are spline-fitted so as to be movable in the axial direction, and the fan fixing member is elastically attached to the internal combustion engine side by an elastic member. The relative position between the fan and the shroud is changed according to the rotation speed of the fan.

The device disclosed in Japanese Utility Model Laid-Open No. 1-115838 has a part of a pump case of a water pump extended, and a fan support mechanism is provided at the extended part to support the fan. .

In Japanese Utility Model Laid-Open No. 2-127734, an internal combustion engine and a radiator are mounted on a main frame via elastic bodies, and a fan drive shaft for driving a fan is pivotally supported by a radiator shroud. In the above fan, the fan drive shaft and the fan pulley shaft are connected by a flexible joint.

The one disclosed in Japanese Utility Model Laid-Open No. 3-45422 has an engine room communicated with an air discharge passage of a blower.

[0012]

By the way, as shown in FIG.
In the fan mounting structure shown in FIG. 6, a cooling fan 132 is mounted via a water pump pulley 116 to a pulley seat 130 fixed to the tip of a water pump shaft 114 of the water pump 106.

Therefore, the fan 132 is coaxially attached to the water pump shaft 114 of the water pump 106.

However, in such a fan mounting structure, there is an inconvenience that the layout is restricted due to the positional relationship with a radiator (not shown) and the degree of freedom is small, and interference with a cover, a belt or the like occurs. There is an inconvenience.

[0015]

In order to eliminate such inconvenience, the present invention is provided with an auxiliary machine bracket for supporting auxiliary machines attached to an internal combustion engine, and one end side of the auxiliary machine bracket is attached to the bracket. An arm member to be attached is provided, and a fan pulley to which a cooling fan is attached is pivotally provided on the other end side of the arm member.

[0016]

According to the structure of the present invention, an arm member, one end of which is attached to a bracket for an auxiliary machine that supports auxiliary machines attached to an internal combustion engine, is provided, and the other end of the arm member is pivotally supported. By attaching a cooling fan to the fan pulley, the fan can be arranged regardless of the position of the water pump shaft of the water pump.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 to 4 show an embodiment of the present invention. In FIG. 1, 2 is an internal combustion engine. The internal combustion engine 2 includes, in the cylinder block 4, auxiliary components such as a water pump 6, an alternator 8, an air conditioner (air conditioner) compressor 10, an oil pump 12, and a power steering (power steering) pump 1.
4 etc. are attached.

The internal combustion engine 2 has a crankshaft 16 provided with a crank pulley 18 for an auxiliary machine in order to drive auxiliary machines such as the water pump 6. The water pump 6
Includes a water pump shaft 20 and a water pump pulley 2
2 is provided. In the alternator 8, an alternator pulley 26 is provided on the alternator shaft 24.

The air conditioner compressor 10 includes:
A compressor pulley 30 is provided on the compressor shaft 28. The oil pump 12 includes an oil pump shaft 32 and an oil pump pulley 34. In the power steering pump 14, a power steering pump shaft 36 is provided with a power steering pump pulley 38.

A belt 40 for an auxiliary machine is wound around the crank pulley 18, auxiliary pump pulley 22, alternator pulley 26, compressor pulley 30, oil pump pulley 34, power steering pump pulley 38 for the auxiliary machine.

As a result, accessories such as the water pump 6 are driven by the crankshaft 16 via the accessory belt 40. Reference numeral 42 is an idler shaft. An idler pulley 44 is axially supported on the idler shaft 42. The accessory belt 40 is wound around the idler pulley 44.

The air conditioner compressor 10 which is one of the auxiliary machines of the internal combustion engine 2 is supported by an air conditioner bracket 46 which is an auxiliary machine bracket. The air conditioner bracket 46 is attached to the cylinder block 4 by a bracket attaching bolt (not shown).

An arm member 48 is attached to the air conditioner bracket 46. The arm member 48 is shown in FIGS.
As shown in FIG. 4, a mounting portion 52 is provided on one end side of a substantially triangular main body 50, and a mounting hole 54 is provided in this mounting portion 52. An arm mounting bolt 56 is inserted into the mounting hole 54.

Further, the arm member 48 is provided with an adjusting portion 58 on one end side of the main body 50, and the attaching hole 5 is provided in the adjusting portion 58.
An adjusting hole 60 having a curved long hole shape extending in the direction of an arc R drawn with 4 as the swing center C is provided. The adjusting bolt 62 is inserted into the adjusting hole 60. The reference numeral 64 is
It is an operation screw hole. The operation bolt 6 is provided in the operation screw hole 64.
6 is screwed on.

The arm member 48 is provided on the other end side of the main body 50 with a shaft supporting portion 68 protruding in a direction parallel to the axis of the mounting hole 54. The shaft support 68 has a hollow hole 70. The shaft support 68 includes an end edge 68 on one end side in the axial direction.
A retaining screw hole 72 is provided in a. A retaining bolt 74 is screwed into the retaining screw hole 72.

A bearing 76 is mounted on the shaft support portion 68 of the arm member 48. The bearing 76 includes an inner ring 78 and an outer ring 8
0 and a rolling element 82 held between the inner ring 78 and the outer ring 80, and the inner ring 78 is externally press-fitted into the shaft support portion 68 to be mounted. The bearing 76 mounted on the shaft supporting portion 68 is locked at the end edge 78 a of the inner ring 78 on the one axial end side by screwing the retaining bolt 74 into the retaining screw hole 72, and is removed from the shaft supporting portion 68. You are prevented from leaving.

A fan pulley 84 is attached to the bearing 76. The fan pulley 84 is provided with a bearing mounting portion 86 on one end side in the axial center direction and a fan mounting portion 88 on the other end side in the axial center direction. The bearing mounting portion 86 is the bearing 7
The outer ring 80 of 6 is press-fitted and mounted. As a result, the fan pulley 84 is axially supported by the bearing 76 on the other end side of the arm member 48. A fan mounting surface 90 and a fan mounting screw hole 92 are provided on an edge 88a at the other end of the fan mounting portion 88 in the axial direction. Fan mounting screw hole 9
A fan mounting bolt (not shown) is screwed onto the unit 2.

The fan mounting surface 90 of the fan mounting portion 88
A cooling fan 94 is attached to this. The fan 94 is mounted on the fan mounting surface 90 by screwing a fan mounting screw (not shown) into the fan mounting screw hole 92.

The crankshaft 16 of the internal combustion engine 2 is provided with a fan crank pulley 96. In the fan pulley 84 and the fan crank pulley 96,
A fan belt 98 is wrapped around.

Next, the operation will be described.

The internal combustion engine 2 includes a cylinder block 4
As auxiliary equipment, for example, a water pump 6, an alternator 8, an air conditioner (air conditioner) compressor 10, an oil pump 12, a power steering (power steering) pump 14, and the like are attached.

The air conditioner compressor 10 which is one of the accessories of the internal combustion engine 2 is supported by an air conditioner bracket 46 which is an accessory bracket. The air conditioner bracket 46 is attached to the cylinder block 4 by a bracket attaching bolt (not shown). An arm member 48 is attached to the air conditioner bracket 46.

In the arm member 48, an arm mounting bolt 56 is inserted into a mounting hole 54 of a mounting portion 52 provided at one end of the main body 50, and the arm mounting bolt 56 is provided in the air conditioner bracket 46. (Not shown). At this time, the arm mounting bolt 56 is temporarily tightened so that the other end of the arm member 48 can be slightly swung without being completely tightened.

Further, the arm member 48 has an adjusting bolt 62 inserted through an adjusting hole 60 of a mounting portion 52 provided on one end side of the main body 50, and the adjusting bolt 62 is inserted into the adjusting bracket 62.
6 is screwed into an adjusting screw hole (not shown) provided in 6. At this time, the adjustment bolt 62 is temporarily tightened so that the other end of the arm member 48 can be slightly swung without being completely tightened.

A fan pulley 84 is axially supported by a bearing 76 on the other end of the arm member 48. A fan 94 is attached to the fan pulley 84. A fan belt 98 is wound around the fan pulley 84 and the fan crank pulley 96 provided on the crankshaft 16.

The arm member 48 has the head of the operation bolt 66 screwed into the operation screw hole 64 on one end side of the main body 50 in a state where the fan belt 98 is wound around the fan pulley 84 and the fan crank pulley 96. An operating tool (not shown) such as a wrench is locked on the and the operating tool is rotated in the direction indicated by arrow A in FIG.

By this operation, the arm member 48 is rotated in the direction shown by the arrow B in FIG. 2 with the mounting hole 54 as the swing center C, and the curved elongated hole-shaped adjusting hole 60 is rotationally moved along the adjusting bolt 62. The tension is applied to the fan belt 98.

The arm member 48 is mounted on the air conditioner bracket 46 by completely tightening the temporarily tightened arm mounting bolt 56 and adjusting bolt 62 with the tension applied to the fan belt 98 at a predetermined value. To be

As a result, the fan 94 is driven by the crankshaft 16 via the fan belt 98 that is wound around the fan pulley 84 and the fan crank pulley 96, and supplies cooling air to the internal combustion engine 2.

As described above, the mounting structure of the fan 94 is such that the air conditioner bracket 46 that supports the air conditioner compressor 10 which is an auxiliary device attached to the internal combustion engine 2.
An arm member 48 having one end attached thereto is provided, and a cooling fan 94 is attached to a fan pulley 84 pivotally supported on the other end of the arm member 48.

Thus, the mounting structure of the fan 94 allows the fan 94 to be arranged regardless of the position of the water pump shaft 20 of the water pump 6.

Therefore, according to the mounting structure of the fan 94, the degree of freedom in the layout of the fan 94 can be increased, the interference with the cover, the belt, etc. can be avoided, and the fan 94 can be arranged. Even if the positions are changed, it is not necessary to newly process and provide the fan mounting portion on the cylinder block 4, and the cylinder block 4 of the internal combustion engine 2 can be shared.

Further, according to the mounting structure of the fan 94, the swinging center C is set in the mounting hole 54 on one end side of the arm member 48.
As described above, by providing the fan pulley 84 pivotally supported by the pivotal support portion 68 at the other end on the air conditioner bracket 46 so that the swing can be adjusted, the tensioner function can be fulfilled and the fan belt 98 is suitable. Tension can be applied and a tensioner can be eliminated. Further, according to the mounting structure of the fan 94, the hollow hole 70 is formed in the shaft support portion 68 of the arm member 48, so that the weight can be reduced.

[0045]

As described above, according to the present invention, an arm member having one end side attached to a bracket for an auxiliary machine supporting an auxiliary machine is provided, and a fan pulley pivotally supported on the other end side of the arm member. By mounting the cooling fan on the fan, the fan can be arranged regardless of the position of the water pump shaft of the water pump.

Therefore, according to this fan mounting structure,
The degree of freedom in the layout of the fan can be increased, interference with the cover, belt, etc. can be avoided, and there is no need to newly process the fan mounting part on the cylinder block even if the placement position of the fan is changed. The cylinder block of the internal combustion engine can be shared. Also, according to this fan mounting structure, the tensioner function can be achieved by providing the arm member with one end side being the swing center and the other end side being swingably adjustable so as to be mounted on the accessory bracket. Can be unnecessary, and further, the weight can be reduced by forming the hollow portion in the arm member.

[Brief description of drawings]

FIG. 1 is a front view of an internal combustion engine having a fan mounting structure showing an embodiment of the present invention.

FIG. 2 is an enlarged front view of an arm member to which a fan pulley is attached.

3 is a cross-sectional view taken along the line 〓-〓 of FIG.

4 is a cross-sectional view taken along the line 〓-〓 of FIG.

FIG. 5 is an enlarged cross-sectional view of a water pump portion having a fan mounting structure showing a conventional example.

FIG. 6 is a front view of an internal combustion engine having a fan mounting structure showing a conventional example.

[Explanation of symbols]

 2 Internal Combustion Engine 4 Cylinder Block 6 Water Pump 10 Air Conditioner Compressor 46 Air Conditioner Bracket 48 Arm Member 50 Main Body 54 Mounting Hole 56 Arm Mounting Bolt 60 Adjustment Hole 62 Adjustment Bolt 66 Operation Bolt 68 Shaft Support 70 Hollow Hole 74 Locking Bolt 76 Bearing 84 fan pulley 86 bearing mounting portion 88 fan mounting portion 90 fan mounting surface 92 fan mounting screw hole 94 fan 96 fan crank pulley 98 fan belt

Claims (2)

[Claims] 1. An internal combustion engine is provided with an accessory bracket for supporting accessories, the arm bracket having one end attached to the accessory bracket, and the other end of the arm member for cooling. A fan mounting structure characterized in that a fan pulley to which a fan is mounted is pivotally provided. 2. The fan mounting structure according to claim 1, wherein the arm member is mounted on the accessory bracket such that one end of the arm member can be pivotally adjusted with respect to the other end thereof.