JPH089374Y2 - Shroud device for engine for industrial vehicle - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shroud device for an engine for an industrial vehicle, and more particularly to improvement of a structure for mounting the shroud device on the engine.

2. Description of the Related Art As an engine for industrial vehicles such as forklifts, shovel loaders, aerial work vehicles, towing vehicles, etc., a longitudinal engine body and a water pump fixed to the upper part of one longitudinal end face of the engine body are used. And a timing gear cover fixed to the lower part of the end face, a cooling fan fixed to the shaft of the water pump, and a radiator provided at a small distance from the cooling fan. Is used for.

A cooling fan (hereinafter, simply referred to as a fan) sends cooling air to a radiator, but a fan shroud that guides the air to the radiator is usually arranged around the cooling fan. It is attached to the engine body. That is, the brackets are fixed to both side surfaces parallel to the longitudinal direction of the engine body, and the fan shroud is fixed to the free ends of the brackets to be attached to the engine.

However, since the fan is fixed to the water pump that is fixed to one end face in the longitudinal direction of the engine body, the distance from the engine body becomes long and the bracket for mounting the fan shroud must be lengthened. Not be obtained, which causes various problems. If the bracket becomes long, the fluctuation of the fan shroud caused by the vibration at the time of engine operation will increase, it will hit the fan, the gap with the fan will not be fixed, and the ventilation to the radiator will not be done well,
In order to prevent them, if the bracket is made to have a high rigidity and the fan shroud is firmly supported, there arises a problem that the manufacturing cost becomes high. Also, because there are other engine components between the engine body and the fan, the shape of the bracket is complicated to avoid them, and in some cases it is necessary to divide them, increasing the number of parts. From these points as well, there arises a problem that the manufacturing cost becomes high.

Further, the fan and the fan shroud need to be accurately positioned so that the gap between them is as small as possible in order to improve the blowing efficiency.
Since the length of the bracket increases and the distance between the fixed end portion of the engine main body and the end portion where the fan shroud is fixed increases, the accuracy of positioning the fan and the fan shroud decreases.

Furthermore, since the brackets are fixed to both sides of the longitudinal engine body along its longitudinal direction,
When fixing the bracket to the engine body, the operator has to move from one side of the engine body to the other side, which is troublesome, and there is also a problem that work efficiency decreases.

Means for Solving the Problems In order to solve the above problems, the present invention supports a fan shroud surrounding a cooling fan on brackets fixed to the water pump and the timing gear cover, respectively. The shroud is positioned by a bracket fixed to the water pump, and the bracket fixed to the timing gear cover allows the fan shroud to move relative to the timing gear cover with the positioning, and then the both can be fixed.

Action and effect The water pump and the timing gear cover are fixed to one end face in the longitudinal direction of the engine body.If the bracket is fixed to them, the distance between the fixed part and the part to which the fan shroud is fixed is the bracket. It is shorter than the case where it is fixed to the main body,
The fan shroud swing caused by engine operation is small, the bracket does not need to be so rigid, and there are few engine components between the water pump, timing gear cover, and fan. In addition, it is not necessary to form the bracket in a complicated shape or to form the bracket in a divided manner, so that the manufacturing cost can be reduced.

In addition, the bracket is short, and the fan shroud is positioned by the bracket fixed to the water pump.For positioning, only the bracket and the water pump are interposed between the fan and the fan shroud. It is easy to improve the relative positioning accuracy between the fan and the fan shroud. Furthermore, since the brackets are fixed to the water pump and the timing gear cover that are fixed to one end face in the longitudinal direction of the engine body, the operator can Bracket installation work can be done on one side of the engine body,
The effect of facilitating the work is obtained.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an engine for a forklift truck equipped with a shroud device according to an embodiment of the present invention, in which 10 is an engine body. The engine body 10 has a longitudinal shape, and the water pump 12 is fixed to the upper part of one end face in the longitudinal direction thereof, while the lower part of the end face thereof is
A timing gear cover 14 that covers a timing gear and a timing belt (not shown) that connects the camshaft and the crankshaft is fixed. A cooling fan 16 is fixed to the shaft 15 (see FIG. 2) of the water pump 12. The fan 16 blows cooling air to a radiator (not shown) which is arranged at a small distance from the fan 16, and includes a pulley 18 (see FIG. 2) fixed to the shaft 15 of the water pump 12 and one end of the crankshaft. A fan belt 24 is wound around the fixed pulley 20 and a pulley 22 attached to the engine body 10, and the water pump 12 and the fan 16 are rotated by the rotation of the crankshaft.

Around the fan 16, a fan shroud 26 that guides the blown air to the radiator is arranged. The fan shroud 26 is a shallow container-like body whose outer shape is almost square.
A hole 30 that is slightly larger than the turning radius of the fan 16 is formed in the bottom wall of the 28, and a bracket 32 fixed to the water pump 12 and a pair of brackets 34 fixed to the timing gear cover 14 make the engine 30 It is fixed. The bracket 32 is formed of a plate material, and as is apparent from FIGS. 1 and 2, a base end portion 36 fixed to the upper surface of the water pump 12 and an upper side of the fan shroud 26 from both ends of the base end portion 36. And a pair of arms 38 extending toward both corners. The tips of the arms 38 are bent toward the fan shroud 26, and a mounting portion 40 that is parallel to the bottom wall of the fan shroud 26 is provided at the tip thereof, and at the mounting portion 40, the back surface of the fan shroud 26 is bolted. It is fixed. Also, the bracket 34
Is one in which both ends of a wide plate material are bent to form a mounting portion 42 (only one is shown). One mounting portion 42 is fixed to the timing gear cover 14, and the other mounting portion 42 is attached to the fan shroud 26. It is fixed on the back of the.

In this way the water pump 12 and timing gear cover
If the fan shroud 26 is fixed to the engine by the brackets 32 and 34 fixed to 14 and respectively,
The distance between the fixing portion of the brackets 32, 34 to the engine and the portion on the side where the fan shroud 26 is fixed may be short, and the brackets 32, 34 may be short to reduce the manufacturing cost. The vibration of the fan shroud 26 caused by the vibration is also small, and the bracket
It is not necessary to make the 32 and 34 highly rigid, and the manufacturing cost can be reduced from this point as well.

Further, it is relatively easy to improve the positioning accuracy of the water pump 12 with respect to the engine body 10, and the bracket 32 is mounted on the water pump 12 to which the fan 16 is attached.
Since it is fixed to itself, the bracket 32 and the fan 16 can be easily positioned, and the fan shroud 26 can be accurately arranged around the fan 16 by accurately positioning the bracket 32 and the other bracket 34. The fan shroud 26 may be fixed to the timing gear cover 14.

In addition, water pump 12, timing gear cover 14
Since both are fixed to one end surface of the engine body 10, a worker can perform the work of mounting the brackets 32, 34 on one side of the engine body 10, and an effect of improving work efficiency can be obtained.

In the above embodiment, the fan shroud 26 had a shallow container shape with a square cross section,
It is also possible to use a cylindrical shape or a bottomed cylindrical shape. Further, it is possible to use only one bracket 34.

In addition, although not exemplified, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a front view showing an engine equipped with a shroud device according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. 10: Engine body, 12: Water pump 14: Timing gear cover, 16 ... Fan 26: Fan shroud 32, 34: Bracket

Claims (1)

[Scope of utility model registration request] 1. A longitudinally shaped engine body, a water pump fixed to an upper portion of one longitudinal end surface of the engine body, a timing gear cover fixed to a lower portion of the end surface, and a shaft of the water pump. A shroud device provided in an engine for an industrial vehicle, comprising a fixed cooling fan and a radiator provided at a small distance from the cooling fan, the fan shroud surrounding the cooling fan. Are supported by brackets fixed to the water pump and the timing gear cover, respectively, and the fan shroud is positioned by the bracket fixed to the water pump, and the bracket fixed to the timing gear cover is attached to the timing gear cover of the fan shroud accompanying the positioning. Relative movement to A shroud device for an engine for an industrial vehicle, characterized by having a structure in which both can be fixed after being inserted.