JP2514796Y2 - Powertrain structure of work vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention elastically supports the lower end of a radiator cooled by a cooling fan linked to an engine to a vehicle body frame and arranges it on the downwind side of the radiator cooling air. The present invention relates to a prime mover structure of a work vehicle in which an intake pipe extends from an air cleaner toward a radiator, and an outside air intake port of the intake pipe is provided on the intake side of the radiator.

[Conventional technology]

In the structure of the driving part having the structure described above, the conventional structure, for example
As shown in Japanese Patent Publication 1-80524, while supporting the radiator on the vehicle body frame at the lower end and filling the space between the hood and the upper and left and right sides of the radiator with a sponge, the radiator cooling air blows inside the radiator. There was something that passed.

[Problems to be solved by the device]

According to the above configuration, the radiator is hardly supported by the flexible sponge, and the radiator is mainly erected only at the lower end.Therefore, when the machine vibration acts on the radiator, stress concentration occurs at the lower end mounting part. It was easily damaged. Therefore, in recent years, a structure has been widely adopted in which the radiator is elastically supported (rubber mount) at its lower end to avoid damage to the mounting portion.

However, if the radiator is elastically supported at its lower end, the upper part of the radiator is apt to sway back and forth, and the shroud attached to the radiator easily contacts the cooling fan supported on the engine side. In addition, the gap between the tip of the fan and the shroud must be set in advance, and the cooling air suction efficiency of the cooling fan tends to decrease.

Further, conventionally, as disclosed in, for example, Japanese Utility Model Laid-Open No. 63-170331, there is known one in which an intake port for intake to the air cleaner is provided in the cooling air introduction path to the radiator. , With this structure, the air cleaner is inhaled to a relatively large amount of dust with dustproof means such as a dustproof net to some extent, but by inhaling the dust that cannot be completely prevented by the dustproof net, There is a problem in that the amount of dust filtered by the air cleaner is relatively large and the filter must be replaced relatively frequently.

The present invention has been made in view of the above circumstances,
It is an object of the present invention to solve the above-mentioned inconveniences by improving the radiator support means and to suppress the inclusion of dust in the air taken into the air cleaner.

[Means for solving the problem]

The working structure of the working vehicle according to the present invention is such that the lower end of the radiator cooled by the cooling fan linked to the engine is elastically supported on the vehicle body frame, and the air cleaner arranged on the downstream side of the radiator cooling wind is directed from the radiator side. Is a structure of a driving part of a work vehicle in which an outside air intake of the suction pipe is provided on the suction side of the radiator, and a dust-proof space is provided between the suction side of the radiator and the suction surface of the radiator. By stretching the net, a dust-proof chamber facing the suction surface of the radiator is formed, and a connecting portion for connecting and fixing the tip end portion of the suction pipe made of an elastic material is provided on the radiator.
The open end of the connecting portion on the upstream side in the suction direction is provided in the dustproof chamber and near the cooling air suction surface of the radiator.

[Action]

According to the above configuration, the suction pipe formed of the elastic member absorbs the vibration of the engine, and it is easy to avoid transmitting the vibration of the engine to the radiator as much as possible. Further, although the suction pipe is an elastic member, the suction pipe is provided with rigidity that does not deform due to suction negative pressure, so that it exerts a function of suppressing the vibration of the radiator. Therefore, even if the gap between the shroud provided in the radiator and the tip of the cooling fan on the engine side is small, they do not come into contact with each other. In addition, since the outside air intake port of the intake pipe that intakes air to the air cleaner is provided near the cooling air intake surface of the radiator, relatively large dust flows along with the intake air by the cooling fan at high wind speed. Then, on the side of the air cleaner that does not require a large amount of intake air, intake is performed while suppressing the intake of relatively large dust.

[Effect of device]

Therefore, by effectively utilizing the suction pipe without newly providing a member for firmly attaching the radiator elastically supported at the lower end portion to the vehicle body, it is possible to suppress the sway of the radiator upper part, and as a result, , It became possible to improve the suction efficiency of the cooling air while preventing the contact between the cooling fan and the shroud. Further, since air is taken into the air cleaner in a state in which the suction of relatively large dust is suppressed, there is an advantage that deterioration of the function of the air cleaner can be suppressed and replacement of the filter can be reduced.

〔Example〕

An embodiment in which the present invention is applied to a riding lawn mower, which is an example of a work vehicle, will be described below with reference to the drawings.

As shown in FIG. 3, the lawn mower is provided with a pair of left and right front and rear wheels (1) and (2), and a prime mover (3) is provided at the front of the vehicle body to control the front and rear wheels (1) and (2). A mower (4) is provided at an intermediate portion, and the grass clippings cut by the mower (4) are configured to be collected in a grass container (6) at the rear of the vehicle body via the duct (5). A skirt (7) is provided at the front end of the vehicle body to prevent foreign matter such as dead leaves and twigs from entering the mower (4) and collected in the grass container (6) together with the lawn.

Next, the structure of the driving part (3) will be described. First
As shown in the figure, an engine (9) and a radiator (10) are elastically supported by a vehicle body frame (11) in a driving part (3) covered with a hood (8), and an air cleaner is provided in front of the engine (9). A cooling fan (13) and a shroud (19) are provided behind (12) and the engine (9), respectively. As shown in FIG. 2, the radiator (10) is provided with sponge-like seal members (14) for guiding cooling air into the radiator (10) on both left and right sides and an upper portion of the hood (8). ) A ventilation hole (15) is provided on the rear wall, and a dustproof net is stretched over this ventilation hole (15) to form a dustproof chamber (18) on the upstream side of the cooling wind of the radiator (10). .

A suction pipe (16) made of an elastic material (rubber) led out from an air cleaner (12) is provided on the upper side of the radiator (10).
A cylindrical connecting portion (17) for fixing the above is welded, and the outside air intake (16a) at the open end of the suction pipe (16) is inserted and fixed. The outside air intake (16a) is also provided near the suction surface of the cooling air of the radiator (10) as shown in FIGS. 1 and 2.

The connecting part (17) has a short cylindrical shape, and the suction pipe (1
6) may be fixed, and the connecting portion may have a concave shape so that the suction pipe can be tightly fitted.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of the driving part structure of a work vehicle according to the present invention. FIG. 1 is a partially cutaway plan view of the front part of the machine body, FIG. 2 is a partially cutaway front view of the driving part, and FIG. FIG. 1 is a side view of an entire riding lawn mower. (9) …… Engine, (10) …… Radiator, (11)…
… Body frame, (12) …… Air cleaner, (13) ……
Cooling fan, (16) …… Suction pipe, (17) …… Connecting part.

Claims (1)

(57) [Scope of utility model registration request] 1. An air cleaner in which a lower end of a radiator (10) cooled by a cooling fan (13) linked to an engine (9) is elastically supported by a vehicle body frame (11) and disposed on the downwind side of a radiator cooling wind. The suction pipe (16) extends from the (12) toward the radiator (10) side, and the outside air intake (16a) of the suction pipe (16) is installed on the suction side of the radiator (10) to drive the work vehicle. Partial structure, said radiator (10)
A dust-proof net is stretched at a distance from the suction side on the suction side of to form a dust-proof chamber (18) facing the suction side of the radiator (10), and the dust-proof chamber (18) is formed above the radiator (10). ,
A connecting portion (17) for connecting and fixing the tip portion of the suction pipe (16) made of an elastic material is provided, and the opening end portion of the connecting portion (17) on the upstream side in the suction direction is provided in the dust-proof chamber (18). And a structure of a driving part of the work vehicle provided near the cooling air intake surface of the radiator (10).