JPH0463503A - Sensor-attaching device of tractor - Google Patents

Abstract

PURPOSE:To provide the subject device enabling height control and rolling control by attaching a lift arm sensor for detecting the vertical rotation angle of a lift arm and a tilt sensor for detecting the tilt of a vehicle body to a sensor bracket detachably attached to the body of a tractor. CONSTITUTION:In a sensor-attaching device of a tractor, lift arms 1 for lifting a working machine are fixed to both the ends of a transverse lift arm shaft 2 disposed in a hydraulic case 8 attached to the upper side of a mission case 7 positioned at the rear and upper part of the body 3 of the tractor so that the lift arms are vertically rotated together with the lift arm shaft 2. A sensor bracket 4 is detachably attached to the outer side of the tractor body 3 in the direction of the lift arm shaft 2 and a lift arm sensor 5 for detecting the vertical rotation angle of the lift arms 1 on the lift arm shaft 2 and a detector sensor 6 for detecting the tilt of the tractor body 3 are attached to the sensor bracket 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sensor mounting device for a tractor. A tilt sensor is attached and can be used for height control to control the vertical position of a working device attached to a tractor, rolling control to control the horizontal posture in the left and right direction, etc.

(Prior Art and Problems to be Solved by the Invention) A lift arm sensor for detecting the arm angle of a lift arm that allows a working device to be raised and lowered is provided with a potentiometer located on the axis of the arm axis of the lift arm. By aligning the axis of the lift arm sensor with the axis of the lift arm sensor and attaching the lift arm sensor to the tractor body, the lift arm angle can be detected and connected via the lower link etc. that is raised and lowered by the lift arm. In the case where the height of the work equipment is controlled, if rolling control of the tractor work equipment is to be performed, the inclination sensor that detects the horizontal inclination of the tractor body is installed in the transmission case that constitutes the tractor body. Attach to the top or rear surface, etc.

However, the rear part of the tractor body is provided with various mechanical members for connecting, raising and lowering, and transmitting working equipment, as well as an upper cockpit, operating mechanisms, and even a rear axle fender. Therefore, the installation space is small, and it is difficult to wire the sensor easily.

(Means for Solving the Problems) The present invention provides a sensor bracket 4 that is detachably attached to a tractor body 3 on the outside in the direction of the arm axis 2 of a lift arm 1 that raises and lowers a working device. This is the configuration of a sensor mounting device for a tractor, in which a lift arm sensor 5 for detecting the vertical movement angle and a tilt sensor 6 for detecting the tilt of the tractor body 3 are mounted.

(Invention and Effects of the Invention) A lift arm sensor 5 and an inclination sensor 6 are attached to the sensor bracket 4 and attached to the side surface of the tractor body 3 near the axial end of the lift arm 2. in this case,
The lift arm sensor 5 is attached so that its axial center coincides with the axial center of the lift arm shaft 2.

For example, when controlling the height of one working device, the lift arm sensor 5 detects the lift arm angle and performs position control, working depth control, etc. so that the height is maintained at a predetermined set height. Furthermore, in the rolling control, the horizontal inclination angle of the tractor body 3 is detected, and the vertical position of the left and right lower links with respect to the lift arm 1 is changed according to this inclination angle, thereby controlling the connected working equipment from left to right. Control to maintain horizontal posture.

In this way, the lift arm sensor 5 and the tilt sensor 6 can be attached to and detached from the tractor body 3 using the same bracket 4, so the sensors can be installed at the same position, making it easy to organize the wiring for the controller. ,
The configuration can be simplified, and when installing it on the tractor body 3, if the tilt sensor 6 is horizontally aligned, the horizontal position of the lift arm sensor 5 can also be adjusted or set at the same time, and the installation operation is easy. can be converted into

(Example) A tractor is a four-wheeled vehicle having front and rear axles, and is driven by an engine mounted in the front. Lift arm 1 is
It is fixed to both left and right ends of the lift arm shaft 2 in the lateral direction to the hydraulic case 8 which is located above the rear end of the tractor body 3 and is attached to the upper side of the transmission case 7, and is integrated with the lift arm shaft 2. It moves up and down. Further, this lift arm shaft 2 is rotated by operating a control valve of an internal hydraulic system.

A lower link 9, which is movable up and down, is supported by a support shaft 10 on both left and right sides at the rear end of the mission case 7, and a lift rod 11 connects the left and right lower links 9 and the lift link 1. The lower link 9 is raised and lowered by vertical movement of the lift arm 1. Further, one of the left and right lift rods 11 is expanded and contracted by a rolling cylinder 12 that can be expanded and contracted by hydraulic pressure and a rolling control valve, and the distance between the lower link 9 on this side and the lift arm 1 is changed, and the left and right lower links are adjusted. The horizontal posture of the working device (for example, a tilling device) connected by 9 can be operated horizontally.

Moreover, this rolling cylinder 12 has a stroke sensor 1.
3, the length of expansion and contraction can be detected.

The sensor bracket 4 includes a horizontal sensor mounting base 14,
A mounting piece 16 is formed to be attached to the side surface of the hydraulic case 8 with bolts 15 or the like, and a mounting plate 17 is integrally provided on the top surface of the sensor mounting base 14 by welding or the like and stands upright along the front-rear direction. These sensor mounting base 14 and mounting plate 1
A diagonal connecting plate 18 is integrally welded between the rear end of the connecting plate 18 and the cover 19 is attached to the connecting plate 18 by bolts 25.
It can be fixed by tightening with etc.

The lift arm sensor 5 attached to the sensor bracket 4 is composed of a potentiometer, and the sensor shaft 20 at the center of the potentiometer is aligned with the axis of the lift arm shaft 2, and is attached with a bolt 23 or the like. Further, the groove of the arm 21 fixed to the inner end of the sensor shaft 20 is engaged with the pin 22 protruding from the lift arm 1, and the sensor shaft 20 is rotated by the rotation of the lift arm shaft 2. The rotation angle of this lift arm shaft 2 is detected.

The inclination sensor 6 is attached to the rear side of the lift arm sensor 5 with a bolt 24 or the like, and detects the horizontal inclination angle or horizontal level of the tractor body 3.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a partial side view, FIG. 2 is a rear view, and FIG. 3 is a slope view. (Explanation of symbols) 1 Lift arm 2 Arm shaft 3 Tractor body 4 Sensor bracket 5 Lift arm sensor 6 Inclination sensor

Claims (1)

[Claims] A sensor bracket 4 is detachably attached to the tractor body 3 on the outside in the direction of the arm axis 2 of the lift arm 1 that raises and lowers the working device.
A sensor mounting device for a tractor includes a lift arm sensor 5 for detecting the vertical movement angle of the lift arm 1 about the arm shaft 2, and a tilt sensor 6 for detecting the tilt of the tractor body 3.