JPH11268542A - Operator cab structure of work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the operator cab of a work machine having an effective and protective function to an outside environment even in miniature, light, and enexpensive. SOLUTION: A pipe-frame-made canopy A for covering the front, upper, and rear part of an operator cab 7, is provided in a closed attitude suitable at the time of travel while a driver is seated on the operator cab 7, or in an opened attitude suitable at the time of boarding and alighting to the operator cab 7 in order to make the attitudes freely changeable, and also plural air blowoff ports 24 for forming an air curtain on the lateral side part of the operator cab 7 are provided on the end part in a right and left direction in the canopy A. An intake port 29 for an engine cooling air is formed on an operation panel wall 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving unit structure of a working machine such as a lawnmower or a garden tractor, and more particularly, to a driving unit which is equipped with a light and compact canopy and is effective from soaring cut grass and dust. Related to technology that can be protected.

[0002]

2. Description of the Related Art As a device for covering a driving unit of a working machine, there is provided a cabin for completely shutting off a driving unit from the outside, as disclosed in Japanese Utility Model Laid-Open No. 2-108674, As disclosed in Japanese Utility Model Laid-Open Publication No. 4-26853, a simple type in which a sunshade is attached to a guard frame that protects the driving unit is known.

[0003]

The cabin disclosed in the former publication is effective in that it has an effective protection function against weather and dust, but it is large and complicated in structure and costly. It is difficult to adopt inexpensive models and small models. Further, the sunshade shown in the latter publication is good in that it can be constructed at a low cost, but it is completely unsatisfactory in terms of the protection function against the external environment such as dust and cut grass, and there is room for improvement by any means. Was left.

[0004] It is an object of the present invention to provide a working unit of a working machine that is small, lightweight, inexpensive and has an effective protection function against an external environment.

[0005]

A first aspect of the present invention is to provide a canopy for covering a front part, an upper part, and a rear part of a driving unit with a closed posture suitable for running while sitting on the driving unit, At the same time, the air outlet for forming an air curtain on the side of the driving unit is provided at the left and right ends of the canopy. Features.

A second invention is characterized in that, in the first invention, an intake port for the engine cooling air is formed in the operating section.

According to the first aspect of the present invention, a simple openable canopy that covers the front, upper, and rear portions of the driving unit and does not cover the left and right sides is provided in the driving unit. A compact and lightweight driving cabin adapted to a seated low posture can be configured. The air blown from the left and right of the canopy allows the left and right sides of the driving unit to be shut off by air curtains, so that the left and right sides have no fixed object covering, but the external environment such as cut grass, dust and rain Effective protection function against

According to the configuration of claim 2, the following operation is added in addition to the above operation. In other words, since the intake of the radiator cooling air is provided in the driving section almost insulated from the outside by the canopy and the left and right air curtains, dust, grass, etc. hardly reach the intake and clean air is minimized. , The clogging of the radiator is less likely to occur, and good cooling performance can be maintained for a long period of time.

In the operating unit structure of the working machine according to the first and second aspects, the openable and closable canopy for covering the front, upper and rear portions of the operating unit and the left and right air curtains are organically combined. As a result, it was possible to provide a compact and inexpensive rational cabin having an effective protection function against the external environment, which can be adopted for a small model such as a small riding lawn mower and a low-cost model.

In the operating unit structure of the working machine according to the second aspect, by utilizing the fact that the operating unit is brought into a clean environment state by the above effect, it is possible to maintain good cooling performance of the radiator for a long time. There is an advantage that high reliability can be obtained.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a riding lawn mower which is an example of a working machine. 1 is a hood, 2 is an elevating link mechanism, 3 is a mower, 4 is a body frame, 5 is an engine, 6 is a radiator, and 7 is a driving unit. , 8 are HS for running
T and 9 are missions, 10 is front wheels, 11 is rear wheels, 12 is a steering wheel, 13 is a driver's seat, and A is a canopy.

As shown in FIGS. 1 to 3, canopy A
A fixed frame 14 erected from the rear of the body frame 4, a movable frame 15 pivotally supported on the upper end of the fixed frame 14 so as to be rotatable around a fulcrum P in the left-right direction.
It is composed of left and right gas cylinders 16, 16, etc., which extend over these frames 14, 15 near the fulcrum P.

The fixed frame 14 includes a pair of left and right vertical pipes 14a, 14a and a connecting pipe 14b for connecting these pipes.
And each of the vertical pipes 1
At the upper ends of 4a and 14a, the pivotal support 14 of the movable frame 15 is provided.
c is provided. Further, a transparent synthetic resin plate (or glass) 17 such as a transparent acrylic plate is attached between the left and right vertical pipes 14a, 14a to secure a rear view.

The movable frame 15 comprises a pair of left and right bent pipes 15a, 15a, and a connecting member 15b for connecting these.
In addition, the bent pipes 15a, 15a are provided with a pivotal support 15c at the base end of the bent pipes 15a, 15a. At the front side of the movable frame 15, a see-through synthetic resin plate 18 extending over the left and right bent pipes 15a, 15a is attached to secure a front view. At the distal ends of the left and right bent pipes 15a, 15a, there is provided an attachment / detachment mechanism 23 comprising an engaged portion 21 provided on the traveling body side and an engaging portion 22 which is disengaged. Also, the movable frame 15
Is covered with a hood member 19 so as to be a shade. Reference numeral 20 denotes a handle to be gripped during the opening / closing operation.

That is, as shown by the solid line in FIG. 1, when the driver is traveling while sitting in the driver's seat 13, the movable frame 1
5 is lowered, and the engaging portion 22 is engaged with the engaged portion 21 to bring it to the closed position. In this state, the overall height of the canopy A is kept low, and it is easy to travel even in a place where obstacles are at a low position, such as being able to pass between trees or travel in a house without interfering with branches.

At the time of getting on and off the driving section 7, the engagement between the engaging section 22 and the engaged section 21 is released as shown by a virtual line in FIG. The movable frame 15 is lifted around the fulcrum P by holding the handle 20 to bring the movable frame 15 to the open position. In this state, the upper surface as the canopy A is in an open state, and the standing position in the driving unit 7 is possible, so that a comfortable getting on / off posture can be obtained without bending over the upper body.

The left and right side surfaces of the canopy A are configured so as to be able to shut off (or almost shut off) the operating unit from the outside by an air curtain. That is, the left and right vertical pipes 1
A plurality of air outlets 24 are formed in each of the pipe 4a and the bent pipe 15a, and the insides of these pipes are communicated with each other at the pivots 14c and 15c. The discharge side duct 26a of the blower 26 is connected to the inside of the connection pipe 14b. The lower pipes 14a are connected to the lower portions of the vertical pipes 14a through the respective pipes.
A connection hose for communicating the insides of the vertical pipes 14a and 15a may be provided at the fulcrum P.

The blower 26 can be driven by inputting power from the HST 8 or the like, and blows out through the internal space of the vertical pipes 14a and the bent pipes 15a, which are hollow members, so that the air corresponding to the right and left side covers is obtained. The direction of each outlet 24 is set so that a curtain can be formed. In addition, it is also possible to give coolness to the pilot by air blown out from the outlet 24.

As shown in FIG. 1, a front blow-out type cooling fan 27 is arranged in front of the radiator 6, and the radiator cooling air is introduced into the lower part of the panel wall 28 and the left and right sides below the steering handle 12. An opening 29 is provided so that the clean operation unit 7 can be sucked in air that is blocked from the outside by the canopy A and the left and right air curtains.

[Another Embodiment] As shown in FIG. 4, a fixed frame 14 is erected on the bonnet 1 and is provided with a fulcrum P at an upper portion thereof to cover a front portion of the connecting portion 7 so as to be small. The canopy 15 may be configured as an inverted L-shape in side view that can swing open and close at the fulcrum P. In this case, an electric fan 30 is provided below the movable frame 15, and the wind is sent from the left and right bent pipes 15a to the vertical pipe 14a in order.

A canopy A having an open / close fulcrum P at the upper and lower central portions of the vertical pipe 14a in FIGS. 1 and 4 may be used.
Further, a hinge is provided at a lower portion of the right vertical pipe 14a and a lower end of the right bent pipe 15a in FIG. In this case, the left side of the air curtain is the only one, and the right side of the canopy is made of a plate material. When closed, the canopy is physically blocked from the outside to enhance the effect of preventing dust and cut grass from entering from outside. It is also possible.

[Brief description of the drawings]

FIG. 1 is a side view of a riding lawn mower.

FIG. 2 is a plan view of a riding lawn mower.

FIG. 3 is a perspective view showing the structure of a canopy.

FIG. 4 is a side view of a lawnmower equipped with a canopy of another structure.

[Explanation of symbols]

 7 Operating section 24 Air outlet 29 Inlet for radiator cooling air A Canopy

 ──────────────────────────────────────────────────の Continued on the front page (72) Katsuhiko Uemura, Inventor 64, Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Factory (72) Inventor, Yoshio Tomiyama 64, Ishizukitacho, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing In-house (72) Inventor Seiya Harada 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Inc. (72) Inventor Takashi Fujii 64 Ishizukita-machi Sakai City, Osaka Prefecture Inside Kubota Sakai Works, Ltd. (72) Invention Person Hiroshi Oshima 64 Kubota Sakai Works, Sakai City, Osaka Prefecture (72) Inventor Hiroshi Kawabata 64 Kubota Sakai Works, Sakai City, Osaka Prefecture

Claims (2)

[Claims] 1. A canopy covering a front part, an upper part, and a rear part of a driving part is switched between a closed posture suitable for traveling while sitting on the driving part and an open posture suitable for getting on and off the driving part. An operating part structure of a working machine of a working machine, wherein the operating part is freely configured and provided with an air outlet for forming an air curtain on a lateral side of the operating part at an end in the left-right direction of the canopy. 2. The operating part structure of a working machine according to claim 1, wherein an intake of an engine cooling air is formed in the operating part.