JPH0664547A - Steering angle detecting device for tractor or the like - Google Patents

Abstract

PURPOSE:To facilitate the fitting of a potentiometer for detecting the steering angle of a tractor. CONSTITUTION:A potentiometer 2 for detecting the steering angle of a steering wheel 1, and an interlocking link 4 for interlocking the rotation of a pitman arm 3 with the potentiometer 2 are fitted to a bracket 6 removable from a power steering body 5 to form a steering angle detecting device for a tractor or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering angle detecting device for detecting a steering angle of a tractor or the like.

[0002]

2. Description of the Related Art When a potentiometer for detecting a steering angle is installed, the steering angle position and the installation angle position of the potentiometer match a certain reference position. It must be done, but this adjustment is troublesome.

[0003]

According to the present invention, a potentiometer 2 for detecting a turning angle of a steering wheel 1 and an interlocking link 4 for interlocking the rotation of a pitman arm 3 with the potentiometer 2 are provided to a power steering body 5. A steering angle detection device such as a tractor mounted on a detachable bracket 6 is configured.

[0004]

When the pitman arm 3 of the power steering body 5 is rotated by the operation of the steering wheel 1, the steering wheels are steered and interlocked, and the pitman arm 3 interlocks with the interlocking link 4. It is interlocked with potentiometer 2. Predetermined control is performed by detecting the steering angle by the potentiometer 2.

To attach and detach the potentiometer 2, the potentiometer 2 and the interlocking link 4 associated with the potentiometer 2 are attached to the bracket 6, which can be attached to and detached from the power steering body 5 as a unit integrated with the bracket 6. When the bracket 6 is attached, it is sufficient to attach the interlocking link 4 to the pitman arm 3 at a predetermined position while linking the interlocking link 4 to the pitman arm 3, and as in the conventional case, it is troublesome to align the potentiometer 2 with the attaching position. No operation is required, no adjustment is required during assembly, detection by the potentiometer 2 is accurate, the potentiometer 2 and the like are easily attached and detached, and maintenance is easy.

[0006]

1 to 3, a tractor vehicle body 7 is constructed by integrally connecting a front engine E body, a clutch housing 8, transmission cases 9 and 10, a rear transmission case 11 and the like. A front axle bracket 12 is provided in front of the clutch housing 8 part, a front axle housing 13 is provided in a lower part so as to be freely rotatable around a center pivot 14, and a rear axle housing is provided on both left and right sides of the rear transmission case 11. 15 are provided. Steering wheels (front wheels) 16 are steerably mounted on the left and right ends of the front axle housing 13, and rear wheels 17 are mounted on the left and right ends of the rear axle housing 15. It is a structure in which each can be driven by E. Reference numeral 18 is a hood that covers the engine E, 19 is a fuel tank for the engine E, 20 is a fender, 21 is a hydraulic case, 22 is a lift arm for raising and lowering a working machine, and 23 is a driver's seat.

The power steering body 5 has a mounting portion 24 mounted on the front portion of the front axle bracket 12 by tightening bolts 25. The steering 1 in front of the driver's seat 23 and the input shaft 26 of the power steering body 5 are interlocked by a steering shaft 27 via a universal joint. Within the power steering body 5, rotation of the input shaft 26 causes the power steering to move to the arm shaft 28. The integrated pitman arm 3 can be output and rotated, and further the left and right steering wheels 16 can be steered and rotated around the kingpin from the pitman arm 3 via the rod 29, the steering arm and the like. The arm shaft 28 projects below the power steering body 5.

The bracket 6 which is attached to and detached from the power steering body 5 has a link 31 rotatable about a pin 30, a potentiometer 2, and a meter shaft 32 of the potentiometer 2 which is coaxial with the pin 30. And the meter arm 33 that rotates as
Are detachably attached to the lower surface of the power steering body 5 with bolts 34. By engaging the link pin 35 at the tip of the link 31 with the groove of the meter arm 33 and rotating the link 31 around the pin 30, the link 31 and the meter arm 33 on the coaxial center rotate at the same angle. The interlocking link 4 is configured to be moved. Further, a long hole 46 is formed on the other end side of the link 31 so that it can be fitted with a pin 36 attached to the upper side of the pitman arm 3, and when the bracket 6 is attached with a bolt 34,
By making the long hole 46 of the link 31 engage with the pin 36, after the attachment, the pitman arm 3 is rotated around the arm shaft 28 in accordance with the steering operation, so that the link 31 Is rotated around the pin 30, and the meter arm 33 is rotated so that the potentiometer 2 can detect the steering angle of the front wheel 16.

In FIG. 4, the difference from the above example is that the radiator 37 provided on the front side of the engine E is tilted in a front low rear high posture so that the dust net 3 which is the intake surface of the radiator 37.
8 is on the upper side, and the radiator fan 41 rotated by the shaft 39 driven from the engine E side, the bevel gear 40, etc. is on the lower side. 42 is an intake port that opens to the front of the hood 18, 43 is a radiator 3
Radiator pipe connecting between 7 and engine body,
Reference numeral 44 is a duct that guides the cooling air from the radiator 37 to the rear of the engine E. Reference numeral 45 denotes a lift arm provided at the front part of the vehicle body 7 to control the work machine for front mounting up and down.

With such a structure, the height of the front portion of the bonnet 18 can be made lower than the height H of the conventional bonnet, the visibility is improved, and the work of the front mount form is facilitated. it can.

[Brief description of drawings]

FIG. 1 is a side view of a front axle bracket portion.

FIG. 2 is a plan view thereof.

FIG. 3 is a side view of the tractor.

FIG. 4 is a side view of an engine section showing another embodiment.

[Explanation of symbols]

 1 Steering 2 Potentiometer 3 Pitman arm 4 Interlocking link 5 Power steering body 6 Bracket

Claims (1)

[Claims] 1. A potentiometer 2 for detecting a turning angle of a steering wheel 1 and an interlocking link 4 for interlocking the rotation of a pitman arm 3 with the potentiometer 2 are attached to a bracket 6 which is detachable from a power steering body 5. Steering angle detector for tractors.