JPS6338295Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a driver's seat for a motor grader.

A motor grader has a rear body with a driver's seat and a front frame facing forward, and a steering wheel and working equipment such as blades and scarifiers are attached to the front frame. Since the engine is equipped with a plurality of cylinders for operating the cylinders, a plurality of control levers are provided at the driver's seat to operate the plurality of operation valves that supply pressure oil to each cylinder.

For example, as shown in FIGS. 1 and 2, a steering wheel d is provided in the middle of a floorboard a via a steering post b, and a plurality of control levers e are provided on both sides of the steering wheel d.
are provided, and each control lever e is connected to the operating valve g via a link mechanism f.

For this reason, the operator's front lower visibility is deteriorated by the link mechanism f, making it difficult to visually check the grounding posture of the work equipment, and work efficiency is reduced.

The present invention was developed in view of the above circumstances, and its purpose is to provide a driver's seat for a motor grader that improves the operator's front lower visibility by providing a link mechanism within the steering post that connects the control lever and the operating valve. It is to be.

Embodiments of the present invention will be described below with reference to FIG. 3 and subsequent figures.

A front frame 3 is provided facing forward on a rear body 2 equipped with a driving wheel 1. A steering wheel 4 is provided on the front frame 3, and a drawbar 5 is vertically swung by an elevating cylinder 6. The drawbar 5 is rotatably supported and is provided with a blade 7 serving as a working device.

A driver's seat 8 of the rear vehicle body 2 is provided with an operator seat 9, a handle 10, a control lever 11, and the like.

That is, as shown in FIG. 5, a handle 10 is provided on the floor plate 12 via a steering post 13, and a pair of left and right first shafts 14 are supported on the upper part of the steering post 13 so as to be rotatable laterally. cylindrical second, third, and fourth shafts 15, 16, and 17 are sequentially rotatably externally supported on the first shaft 14, and each shaft 14, 1
The lengths of the levers 5, 16, and 17 become shorter in sequence, and a control lever 11 is connected to each of them.

Similarly, fifth, sixth, seventh, and eighth shafts 18, 19,
20 and 21 are rotatably supported, the first and fifth shafts 14 and 18, and the second and sixth shafts 15 and 1.
9, 3rd, 7th shaft 16, 20, 4th, 8th
The shafts 17 and 21 are the steering post 1
3, the fifth, sixth, seventh, and eighth shafts 1
8, 19, 20, and 21 are respectively connected to the operating valve 24 via the second link mechanism 23.

That is, as shown in FIG. 6, the first link mechanism 22 includes a lever 22a, a rod 22b, and a lever 22c.
The second link mechanism 23 consists of a lever 23a.
and a rod 23b.

Since there is no link mechanism in the middle portion of the steering post 13 in the horizontal and vertical directions in the driver's seat 8, the front lower visibility is improved, and the grounding state of the work implement 7 can be easily seen, improving work efficiency.

In addition, the first to fourth shafts 14 to 17 are concentric, and the control levers 11 can be arranged in the left-right direction so that they are at the same position in the front-rear direction, making it easy to operate the control levers 11. Become.

The present invention is as described above, and the control lever 1
1 and the operating valve 24 is provided in the steering post 13, the front lower visibility is improved, making it easier to visually see the grounding state of the work equipment, and improving work efficiency.

Further, since the upper left and right shafts are provided concentrically, each control lever can be arranged in the left and right direction so as to be at the same position in the front and back direction, and the control lever 11 can be easily operated.

[Brief explanation of the drawing]

Fig. 1 is a front view of the conventional example, Fig. 2 is a side view, Fig. 3 is an overall side view showing the embodiment of the present invention, Fig. 4 is a plan view, Fig. 5 is a front sectional view of main parts, FIG. 6 is an explanatory diagram of the link mechanism. 2 is a rear vehicle body, 3 is a front frame, 7 is a working machine, 8 is a driver's seat, 10 is a steering wheel, 11 is a control lever, 13 is a steering post, and 24 is an operating valve.

Claims (1)

[Scope of utility model registration request] A front frame 3 is attached to a rear body 2 with a driver's seat 8.
In a motor grader in which a working machine 7 is mounted on the front frame 3 and a steering post 13 is provided facing forward, a steering post 13 is provided at an intermediate portion in the left-right direction of the driver's seat 8.
A handle 10 is provided through the steering post 13, and a plurality of shafts of different lengths are provided on the upper and lower left and right sides of the steering post 13, respectively, so as to be rotatable concentrically in the left and right directions. Each shaft is connected via a link mechanism provided in a steering post 13, a control lever 11 is provided on each of the upper left and right shafts, and each of the lower left and right shafts is connected to an operating valve 24. The driver's seat of a motor grader.