JP2007313985A - Steering column device on riding type farm equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type farm equipment constituted by providing a steering wheel 8 and a steering column on a front part of a steering seat 5, mounting various kinds of gages 17, etc. on a meter panel 16 on an upper surface of the steering column 9 and to blast atmospheric air to cool a radiator 22 on an engine 10 to the radiator after taking it in the steering column 9 and devised to protect various kinds of the gages 17, etc. from dust/water droplets accompanying the atmospheric air for cooling. <P>SOLUTION: A box 25 to tightly close the back side of various kinds of the gages 17, etc. is provided on a back surface of the meter panel 16, and a communicating hole 26 to the inside of the steering column and a filter 27 for dust protection for this communicating hole are provided on this box. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a riding-type farm work machine such as a lawn mower or a tractor that is mounted and operated by an operator among various farm work machines, and is provided for attaching various instruments in front of the control seat. This relates to a steering column device.

Conventionally, in a riding farm machine such as a lawn mower or a tractor, for example, as described in Patent Document 1, a steering handle and a steering column are provided in front of a steering seat, Various instruments, switches, and lamps are attached to the meter panel, while atmospheric air for cooling the radiator in the engine is once taken into the steering column and then blown to the radiator.
Japanese Patent Laid-Open No. 2002-337755

  As described above, in the conventional steering column device, various instruments, switches, and lamps are attached to the meter panel on the upper surface of the steering column, while atmospheric air for cooling the radiator in the engine is temporarily put into the steering column. Since it is configured to be sucked into the radiator after being taken in, the back side of various instruments, switches and lamps attached to the meter panel on the upper surface of the control column is directly exposed to the cooling air for the radiator. Since dust and water droplets accompanying the cooling atmospheric air adhere to this, not only the occurrence rate of failures and defects such as electric leakage is high in the various instruments, switches and lamps. There is a problem that the durability of the various instruments, switches and lamps is likely to deteriorate. Was Tsu.

  It is a technical object of the present invention to provide a steering column device that solves these problems.

In order to achieve this technical problem, the present invention
“At the front of the control seat, a control handle and control column are provided, and various instruments, switches, or lamps are attached to the meter panel on the top of the control column, while atmospheric air for cooling the radiator in the engine is In the riding type agricultural work machine configured to blow into the radiator after being taken into the steering column,
A box for sealing the back side of the various instruments, switches or lamps is provided on the back surface of the meter panel, and a communication hole into the steering column and a dustproof filter for the communication hole are provided in the box. "
It is characterized by that.

  Since the back side of various instruments, switches or lamps attached to the meter panel is isolated from the inside of the steering column by a box provided on the back side of the meter panel, the back side of the various instruments, switches or lamps In addition, it is possible to reliably avoid the adhesion of dust and water droplets accompanying the cooling air introduced into the steering column.

  On the other hand, since the air in the box enters and exits through the communication hole due to a change in temperature or the like, it is possible to prevent the pressure in the box from changing, but at this time, dust and water droplets are generated in the box. Intrusion through the communication hole can be reliably prevented by a dustproof filter provided for the communication hole, and thus various types of meters, switches, or lamps are broken or defective, such as electric leakage. This can be surely reduced without causing the above-described deformation and breakage due to the pressure change in the meter panel and box, etc., and the durability of the various instruments, switches or lamps can be improved.

  In this case, as described in claim 2, the back cover of the box is configured to be openable and closable so that various instruments, switches or lamps can be attached to the meter panel, and the various instruments, switches or switches There is an advantage that the workability of connecting the wiring and the harness to the lamp can be improved.

  According to a third aspect of the present invention, a plurality of the communication holes are provided to reduce the pressure change in the box more reliably, while the dustproof filter is used as one dustproof common to the communication holes. By configuring the filter for use, there is an advantage that it is possible to simplify the configuration of providing a dustproof filter for the plurality of communication holes.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings when an embodiment of the present invention is applied to a riding lawn mower will be described.

  As shown in FIGS. 1 and 2, the lawnmower 1 includes a body frame 2 supported by a pair of left and right front wheels 3 and a pair of left and right rear wheels 4. Is provided with a control seat 5 on which an operator is boarded, and a rear cowl 6 that covers the periphery of the control seat 5 and above the rear wheels 4. The rear cowl 6 includes a foot in the control seat 5. In this portion, a step floor base 7 for the worker is integrally provided so as to extend in the left-right direction, and the worker is configured to sit on the control seat 5 while riding on the step floor base 7.

  Further, the body frame 2 is provided with a tilt type steering handle 8 and a steering column 9 in a front part of the control seat 5, and the wheels 4, 5 and a cutting part to be described later are provided in front of these parts. A water-cooled engine 10 that drives the device 13 and a front cowl 11 that covers the front and left and right sides of the engine 10 are provided. The upper half of the engine 10 is covered with a hood 12 that can be freely opened and closed.

  A portion of the lower surface of the body frame 2 between the front wheels 4 and the rear wheels 5 is provided with a reaping device 13 for cutting turf grass planted on the ground when traveling forward. Turf grass cut by the cutting device 13 is collected in a grass collection box 15 attached to the rear part of the body frame 2 through a duct 14 arranged to extend rearward between the rear wheels 4. The turf grass collected in the grass collection box 15 is configured to be discharged from the grass collection box 15 by rotating the grass collection box 15.

  The steering column 9 is formed in a hollow shape so as to rise from the step floor 7, and various meters 17 and lamps 18 are projected on the back surface of the meter panel 16 on the meter panel 16 on the upper surface thereof. Installed.

  In addition, various steering operation tools such as an accelerator petal 19, a brake petal 20, and a clutch petal are provided on the side of the steering column 9 in the step floor 7. The engine chamber 12a communicates with the steering column 9.

  A radiator 22 having a ventilation fan 21 on the surface on the engine 10 side is disposed between the engine 10 and the steering handle 8 in the bonnet 12. A partition plate 23 for partitioning the engine chamber 12a in front of the radiator 22 and the inside of the steering column 9 is provided. By rotating the ventilation fan 21 with the engine 10, atmospheric air is After taking in the steering column 9 from the vent hole 9a provided in the steering column 9 or the shaft of the steering handle 8 penetrating the steering column 9, etc., after passing through the radiator 22 from inside the steering column 9 The engine chamber 12a is configured to blow air.

  A box 25 having a sealed structure is provided on the back side of the meter panel 16 of the steering column 9 with a back cover 24 configured to be openable and closable. The box 25 is attached to the meter panel 16 in the box 25. Look at the back of various instruments 17 and lamps 18.

  Further, the back cover 24 is provided with a plurality of communication holes 26 between the box 25 and the inside of the control column 9, while the surface of the back cover 24 is made of, for example, a porous sponge. One dustproof filter 27 configured as described above is provided so as to block the communication holes 26 simultaneously with the filter 27.

  The bottom of the steering column 9 is closed with a partition plate 28, so that atmospheric air that is less dusty on the upper surface side of the step floor 7 is taken into the steering column 9. is doing.

  In this configuration, the lawn mower 1 performs the lawn mower 1 by moving the lawn mower 1 forward with the mowing device 13 driven.

  In this lawn mowing operation, a large amount of dust such as cut grass turf grass and earth and sand will soar from the ground. The atmospheric air which is in a state where there is little dust soaring from the ground and is in a state where there is little dust on the upper surface side of the step base 7 is taken into the control column 9, To the radiator 22.

  The back side of various instruments 17 and lamps 18 attached to the meter panel 16 in the steering column 9 is isolated from the inside of the steering column 9 by a box 25 and its back cover 24 provided on the back side of the meter panel 16. Therefore, it is possible to reliably prevent the dust and water droplets accompanying the cooling atmospheric air introduced into the operation column 9 from adhering to the back side of the various instruments 17 and the lamp 18.

  On the other hand, since the air in the box 25 enters and exits through each communication hole 26 due to a change in temperature or the like, the pressure in the box 25 can be prevented from changing. Intrusion of dust and water droplets through the communication hole 26 can be reliably prevented by a dustproof filter 27 provided for the communication hole 26.

  The above embodiment has been applied to a lawn mower that soars a large amount of dust from the ground. However, the present invention is not limited to this, and the present invention is not limited to this. It goes without saying that can also be applied.

  Further, as described above, instead of attaching the various instruments 17 and the lamps 18 to the meter panel 16 in the steering column 9, any one of the various instruments 17, the various lamps 18 and the various switches can be used. One or more may be configured.

It is a side view of a lawn mower. It is a top view of FIG. FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 2. It is a principal part expanded sectional view of a steering column.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lawn mower 2 Body frame 3 Front wheel 4 Rear wheel 5 Control seat 7 Step bed base 8 Control handle 9 Control column 10 Engine 12 Bonnet 13 Mowing device 21 Ventilation fan 22 Radiator 23 Partition plate 24 Back cover 25 Box 26 Communication hole 27 Filter

Claims (3)

A steering handle and a steering column are provided at the front of the steering seat, and various instruments, switches, or lamps are attached to the meter panel on the upper surface of the steering column, while atmospheric air for cooling the radiator in the engine is supplied to the steering seat. In the riding type agricultural machine configured to be blown into the radiator after being taken into the column,
A box for sealing the back side of the various instruments, switches or lamps is provided on the back surface of the meter panel, and a communication hole into the steering column and a dustproof filter for the communication hole are provided in the box. Steering column device for riding type farm work machine characterized by the above.   2. The steering column device in a riding type agricultural working machine according to claim 1, wherein a back cover of the box is configured to be openable and closable.   The riding type agricultural work according to claim 1 or 2, wherein the plurality of communication holes are provided, and the dustproof filter is configured as one dustproof filter common to the communication holes. Steering column device in the aircraft.

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