JPH0225832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of a control section of a tractor for agricultural or civil engineering use.

(Prior Art) As shown in FIG. 4, above the tractor body 1, an operating space 7 is formed slightly rearward from the center, and the left and right sides of the operating space 7 serve as entrances and exits, with a seat 55 at the rear and a seat 55 at the front. A steering device 56, an operation panel 9 and a bonnet 5 are arranged. Steering box 21 of power steering device 56
is fixed to the upper surface of the vehicle body 1 below the operation panel 9, and its axis is substantially straight with the handle shaft 18.

(Problem to be Solved by the Invention) In small tractors, the brake pedal and clutch pedal are located on the side of the vehicle body, so there is not much problem even if the steering box 21 is located on the vehicle body, but in large tractors, the steering box 21 is located on the vehicle body. Since the width is wide, the steps are almost the same as the top surface of the car body 1, and the top surface of the car body serves as a footrest, it becomes difficult to place the pedals on the sides of the car body, and it becomes necessary to place the pedals above the car body. The steering box becomes an obstacle to the arrangement and is subject to restrictions.

Also, even if the steering box is a hydraulic control valve as shown in Figure 4 or a gear type, repairs and inspections are carried out, but at that time oil spills may stain the tractor floor. Moreover, since it is hidden between the operation panel 9 and the vehicle body 1, the workability is deteriorated.

(Means for Solving the Problems) In view of the above-mentioned problems, the present invention provides a steering box 21 that is mounted in front of a partition plate that partitions the operation panel 9 and the bonnet 5 and above away from the vehicle body 1. The box 21 is placed outside the tractor floor surface, and the mounting member 19 that supports the handle post 17 substantially upward is arranged on the back side of the partition plate 11 in an upwardly rearwardly inclined manner, so that the space between the top surface of the vehicle body and the mounting member 19 is It is an object of the present invention to provide a structure of a control section of a tractor that expands an operation space 7 to a maximum extent.

A feature of the present invention for achieving this object is that a bonnet 5 and an operation panel 9 are arranged before and after a partition plate 11 erected on the vehicle body 1, and a mounting member 19 is provided on the back side of the partition plate 11. is fixed, and a handle post 17 is supported at the rear of this mounting member 19 in an upwardly slanted shape relative to it, and a transmission shaft 20 and a universal joint 23 are connected to the handle shaft 18 in this handle post 17 passing through the partition plate 11. In the structure of the steering section of a tractor connected through the partition plate 11, a steering box 21 to which the front end of the transmission shaft 20 is connected is attached to an upper position away from the vehicle body 1 on the front surface of the partition plate 11, and the mounting member 19 is attached to the partition plate 11. The transmission shaft 20 and the universal joint 2 are installed facing the steering box 21 and sloping upward at the rear, and have a downward U-shaped cross section.
A bearing part 22 is formed which covers the left and right sides of the transmission shaft 3 and rotatably supports the midway part of the transmission shaft 20.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIGS. 1 to 3, reference numeral 1 denotes a tractor body consisting of an engine 2, a clutch housing 3, a transmission case 4, etc. A control section 6 is formed at the rear of a bonnet 5 surrounding the engine 2.

The control unit 6 includes an operation space 7 having entrances and exits (not shown) on the left and right sides above the vehicle body 1 and in front of the seats, and a steering device 8 disposed behind the bonnet 5 in front of the operation space 7. and an operation panel 9.

Reference numeral 11 denotes a partition plate provided between the operation panel 9 and the bonnet 5, which not only blocks hot air from the engine 2, but also serves to attach components of the control section 6. 12 is a floor sheet forming the floor surface of the tractor, and as shown in FIG.
The part that protrudes wider than the width of the step part 13 serves as a step part 13.

The tractor of this embodiment is a cabin-mounted type; 14 indicates a windshield; the partition plate 11 and the floor sheet 12 are constituent members of the cabin, and are detachable from the vehicle body 1 and the bonnet 5; It is assembled independently and fitted onto the vehicle body. Therefore, the control unit 6 is also housed within the cabin and is connectably connected to the brake, clutch, etc. on the vehicle body.

The steering device 8 has a handle 16, a handle post 17, a handle shaft 18, a mounting member 19, a transmission shaft 20, a steering box 21, etc., and a hydraulic control valve or a steering gear is built in the box 21. .

The steering box 21 and the mounting member 19 face the front and rear surfaces of the partition plate 11 and are mounted in an upwardly inclined rearward direction, and are located as far upwardly as possible from the vehicle body 1, and are located below the mounting member 19 in front of the operation space 7. A lower enlarged portion 7a is formed.

As shown in FIG. 3, the mounting member 19 has a downward U-shaped cross section, and a midway portion of the transmission shaft 20 is rotatably supported therein via a bearing portion 22.
The front end of the transmission shaft 20 is transmission connected to a box 21, and the rear end is connected to a universal joint 23. The mounting member 19 covers the left and right sides and above of the power transmission shaft 20 and the universal joint 23, and allows repair and inspection of them from below.

The handle shaft 18 passes through the inside of the handle post 17, the handle 16 is attached to its upper end, and its lower end is connected to a universal joint 23, so that the steering movement of the handle 16 is controlled by the universal joint 23.
and is transmitted to the transmission shaft 20.

A U-shaped support 24 is provided outside the lower part of the handle post 17, and a holder 25 that surrounds the handle post 17, the handle shaft 18, etc. is attached to this support 24. The holder 25, the support body 24, and the handle post 17 are integrally supported via a pivot 26 at the rear of the mounting member 19. This pivot 26 is a universal joint 23
The handle post 17 and the like are inclined upward with respect to the mounting member 19, and the handle 16 is arranged in a general operating position.

The handle post 17, holder 25, etc. can be tilted forward and backward by the pivot 26, and can be tilted from the solid line position A to the imaginary line position B in FIG. The support body 24 comes into contact with the stopper part 27 to regulate the tilting position, and the tension spring 2
8 is regulated by hitting the top surface of the mounting member 19 or by providing a separate stopper.

The tension spring 28 is installed between the mounting member 19 and the handle post 17 to reduce the weight lifted when the handle is raised. Reference numeral 29 denotes an arcuate cover integrally molded on the holder 25, which covers a gap created between the holder 25 and the operation panel 9 when the holder 25 is tilted.

Reference numeral 31 denotes a tilt angle setting mechanism, in which a large number of pin holes 33 are arranged around a pivot 26 on the outer periphery of a fan-shaped plate 32 fixed to the lower end of the support body 24 or holder 25, and a bracket 3 fixed to the upper surface of the mounting member 19 is arranged.
4 to slidably support a pin 35, and this pin 35
The tilt angle of the handle post 17 is fixed by inserting it into any pin hole 33 of the fan-shaped plate 32.

The pin 35 is urged toward the fan-shaped plate 32 by a spring 36, and one end of a bell crank 37 is connected to one end of the pin 35, and the other end of the bell crank 37 is connected to a release pedal 39 via a rod 38.

The release pedal 39 is pivotally supported by the partition plate 11, and when depressed, the pin 35 is removed from the pin hole 33 against the force of the spring 36, and the tilting operation of the handle post 17 is released. The handle post 17 can be raised upward (nearly vertical) beyond the tilting range of conventional tractors, and the handle 16 can be placed in a position where the operator does not get in the way when getting on or off the tractor.

The left and right brake pedals 41 are pivotally supported on a shaft 43 provided on a bracket 42 fixed to the rear surface of the partition plate 11, and are supported by an arm 44 and a plurality of links 45.
The two master cylinders 46 disposed inside the bonnet 5 are connected to each other through the cylinders so that the two master cylinders 46 can be operated.

A hand accelerator lever 4 is attached to the end of the shaft 43.
7 is provided, and a foot accelerator pedal 48 is provided on the right step 13.

The clutch pedal 49 is pivotally supported on a shaft 51 provided on a bracket 50 fixed to the rear surface of the partition plate 11. This shaft 51 is located approximately coaxially with the shaft 43.

As mentioned above, the left and right brake pedals 41, the clutch pedal 49, and the release pedal 39 are of the suspended type, and are located in the operating space expansion part 7a, and the steering device 8 is not disposed between the respective treads, so it is best The operator's foot freedom is also improved.

(Effects of the Invention) According to the present invention detailed above, (A) the mounting member 19
is the partition plate 1 facing the steering box 21.
(B) Mounting member 1
9 is mounted in an upper part away from the vehicle body 1 so as to be inclined rearward and upward, so that a lower front enlarged part 7a which is wider toward the operator is formed in the front lower part of the operation space 7 while covering the left and right sides of the transmission shaft 20. (C) Since the mounting member 19 has a downward U-shaped cross section and is formed with a bearing portion 20 that supports the midway portion of the transmission shaft 20, high strength can be achieved even if a thin plate is used. , (D) Since the mounting member 19 covers the left and right sides of the transmission shaft 20 and the universal joint 23, it does not interfere with repair and inspection of these parts, and prevents the operator's feet from hitting them or clothing from getting caught on them. (E) Since the steering box 21 is provided in front of the partition plate 11, repair and inspection are easy, and even if oil spills, it will not stain the floor surface, etc. It is possible to achieve the following effects.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a partially sectional side view, FIG. 2 is a sectional side view of the main part, FIG. 3 is a sectional view taken along the line - in FIG. 1, FIG. 4 is a partially sectional side view of a conventional device. 1... Tractor body, 2... Engine, 3...
Clutch housing, 4...Missing case,
5...Bonnet, 6...Control section, 7...Operation space, 7a...Enlarged section, 8...Steering device,
9...Operation panel, 11...Partition plate, 12...Floor sheet, 13...Step section, 14...Windshield, 16...Handle, 17...Handle post, 18...Handle shaft, 19... Mounting member, 20... Transmission shaft, 21... Steering box, 22... Bearing portion, 23... Universal joint, 24... Support body, 25... Holder, 2
6... Pivot, 27... Stopper portion, 28... Spring, 29... Arc-shaped cover, 31... Tilt angle setting mechanism, 32... Fan-shaped plate, 33...
Pin hole, 34...Bracket, 35...Pin, 3
6... Spring, 37... Bell crank, 38
... Rod, 39 ... Release pedal, 41 ... Brake pedal, 42 ... Bracket, 43 ... Axis,
44...Arm, 45...Link, 46...Master cylinder, 47...Hand accelerator lever, 4
8...Foot accelerator pedal, 49...Clutch pedal, 50...Bracket, 51...Shaft, 55
... Seat, 56... Steering device, A... Solid line position, B... Virtual line position.

Claims (1)

[Claims] 1. A bonnet 5 and an operation panel 9 are arranged before and after a partition plate 11 erected on the vehicle body 1, and the partition plate 11
A mounting member 19 is fixed to the rear side of the mounting member 19, and a handle post 17 is supported at the rear of the mounting member 19 in an upwardly inclined shape relative to the mounting member 19.
In the structure of the control section of a tractor, the handle shaft 18 is connected to a transmission shaft 20 penetrating through the partition plate 11 via a universal joint 23, the transmission shaft is located above the front surface of the partition plate 11 and away from the vehicle body 1. A steering box 21 to which the front ends of the steering boxes 20 and 20 are connected is attached, and the mounting member 19 is attached to the partition plate 11 facing the steering box 21 and sloping upward at the rear, and has a downward U-shaped cross section and connects the power transmission shaft 20 and the universal joint 2.
A structure of a control section of a tractor, characterized in that a bearing section 22 is formed to cover the right and left sides of a transmission shaft 20 and rotatably support a midway portion of a transmission shaft 20.