JPH04190701A - Apparatus for attaching inclination sensor of tractor - Google Patents

Abstract

PURPOSE:To provide an inclination sensor for detecting the lateral inclination angle relative to the machine body by the vertical phase difference of the right and the left lower links and to position the sensor at an easily maintainable arbitrary position by connecting the sensor to a lower link through a wire. CONSTITUTION:An inclination sensor 5 for detecting the lateral inclination angle relative to the machine body by the vertical phase difference of the right and the left lower links 1, 2 is connected to the lower link through a wire 4. The inclination sensor can be positioned at an arbitrary position such as the rear side face or lateral side position of a seat floor 7 under a driver's seat 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tilt sensor mounting device for a tractor, and can be used for rolling control, etc. to maintain and control a tractor operating device in a horizontal horizontal position.

(Prior Art and Problems to be Solved by the Invention) A tilt sensor that detects the horizontal tilt angle of the working device with respect to the vehicle body uses a potentiometer or the like to install a lift cylinder or the like inside the transmission case or above the transmission case. Although it is installed on the side or top of a hydraulic case, the installation location is controlled and maintenance is difficult.

The present invention is not limited to such installation locations, and can be installed at any location.

(Means for Solving the Problems) The present invention provides a tilt sensor 5 that detects the left and right inclination of the working device with respect to the vehicle body 3 by interlocking with a wire 4 based on the vertical angle difference between the left and right lower links 1 and 2. The tractor inclination sensor mounting device is configured such that it can be mounted on the rear side of the seat floor 7.

(Operation and Effects of the Invention) A working device is connected to the rear of the tractor body 3 via a pair of left and right lower links 1.2, and a predetermined work is performed while traveling. At this time, when the vehicle body 3 or the work equipment is relatively tilted in the left-right direction, the vertical position of the left and right lower links 1 and 2 changes with respect to the vehicle body 3, and this change is detected by the tilt sensor 5 via the wire 4. becomes. For example, in rolling control, the detected value by the inclination sensor 5 is fed back to the controller to control the left and right lower links 1.
, 2 are controlled to raise and lower so as to maintain a horizontal posture regardless of the horizontal inclination of the soil surface.

This is because the tilt sensor 5, which detects the left and right tilt angle with respect to the vehicle body 3, is connected to these lower links 1 and 2 via the wire 4 based on the vertical phase difference between the left and right lower links 1 and 2. The inclination sensor 5 can be installed not only on the side of the seat floor 7 below the cockpit 6, but also on the rear side of the seat floor 7 in a different position and orientation. It is possible to share the information. Also, depending on the connection position of the wire 4 to the inclination sensor 5 or the lower links 1, 2, etc.

It can be set so that the vertical difference between the left and right lower links 1 and 2 is expanded and detected by the inclination sensor 5, and by adjusting the mounting position or length of the wire 4, the vertical difference between the left and right lower links 1 and 2 can be increased and detected.
The reference value of the tilt sensor 5 at the two parallel positions can be unified among various models, and the control device can be shared.

(Example) When rotating, the rear transmission case 8 that constitutes the tractor body 3,
9 parts of the hydraulic case on the transmission case 8 are shown, and on both left and right sides of the rear transmission case 8, there is an axle housing 11 containing an axle 10 for driving the rear axle, and an axle housing 11 at the outer end of the axle housing 11. Final case 1
2, etc., and an axle shaft 13 is mounted on this final case 12 to form an interlocking structure.

The hydraulic case 9 is equipped with a control valve for operating a lift cylinder, a piston, etc., and a lift arm 15 is integrated with both left and right end portions of a horizontal lift shaft 14 to rotate up and down. The pair of left and right lower links 1 and 2 are located at the lower part of the rear transmission case 8 on both left and right sides.
The lower links 1 and 2 are connected to each other so as to be movable up and down by a link pin 16, and a lift arm 15 facing each other is connected to each of the lower links 1 and 2 by a lift rod 17. A cylinder 18 is provided, and by expanding and contracting the rolling cylinder 18, the lower link 1 on this side can be moved up and down to change and control the left and right posture of the working device.

A seat floor 7 is provided on the upper side of the hydraulic case 9 and connects the left and right rear wheel fenders 19 extending from above the left and right rear wheels to the inside surface. It is configured to cover the bottom, left and right sides, and rear side of 6. The inclination sensor 5 is attached to both left and right sides of the seat floor 7 or to the rear side surface.

A horizontal link shaft 20 is rotatably provided in the rear transmission case 8, and arms 21 are provided at both left and right ends of the link shaft 20.
．． 22 is fixed, and the - side arm 21 is provided with a wire receiver 24 for receiving the tip end of the outer wire 23 of the wire 4, and the wire 4 position is provided so as to be expandable and retractable with a fastener 25 such as a nut. Moreover, - the tip of this wire 4 is connected to the lower link 1.

The arm 22 on the other side is connected to the lower link 2 on the other side via a rond 26 that can be expanded and contracted to take away the turnbanner. Detection is made by the expansion and contraction of a wire 4 between the two, and the detection is made by the movement of a tilt sensor 5 consisting of a potentiometer via this wire 4.

This tilt sensor 5 has a sensor mounting plate 27.

It can be selectively attached to the inside surface (FIG. 1), rear surface (FIG. 4), etc. of the seat floor 7.

This tilt sensor 5 sensor shaft 28 and sensor arm 2
9 is integrally protruded, one end of the wire 4 is connected to this sensor arm 29, and the outer wire 23
The distal end of the sensor mounting plate 27 is attached to a wire receiver 3o integral with the sensor mounting plate 27 with a fastener 31 such as a nut so that it can be expanded and contracted.

33 is a frame, 34 is a power take-off shaft, and 35 is a check chain.

When the inclination sensor 5 is installed on the rear side of the seat floor 7 as shown in FIGS. 4 and 5, the mounting surface is at a right angle compared to when it is installed on both the left and right sides as shown in FIG.
Since the wires are connected by four wires, if the length is set appropriately, the degree of freedom in mounting increases, and it is difficult to be restricted by other members. Reference numeral 32 denotes a cover consisting of a license plate or the like, which covers the rear side of the tilt sensor 5.

The tilt sensor 5 is configured to input data to a controller having a microcomputer and perform rolling control together with a horizontal sensor that detects the left and right tilt of the vehicle body 3, a lift angle sensor 36 that detects the rotation angle of the lift arm 15, etc. When the horizontal sensor detects the left and right inclination of the vehicle body 3, the rolling cylinder 18 between the lift arm 15 and the lower link 1 is expanded or contracted by the output from the controller, and the working equipment connected to the lower links 1 and 2 is moved to the left or right. Rolling is controlled to keep it horizontal.

At this time, the wire 4 between the lower link 1 and the arm 21 is expanded and contracted by the vertical movement of the lower link 1, thereby activating the tilt sensor 5, and the detection by the tilt sensor 5 is inputted as a voltage to the controller for feedback control.

Also, by switching the control mode in the controller, 1
It is also possible to control and maintain the working device at a constant inclination angle regardless of the inclination angle of the vehicle body.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a left side view of a portion thereof, Fig. 2 is a right side view thereof, Fig. 3 is a rear view, and Fig. 4 is a left side view showing the operating state. 5 is a rear view, and FIG. 6 is a partially enlarged plan view. (Explanation of symbols) 1 (Left) Lower link 2 (Right) Lower link 3 Vehicle body 4 Wire 5 Tilt sensor 6 Pilot seat 7 Seat floor Representative line: Eihisa Mizuta

Claims (1)

[Claims] An inclination sensor 5 that detects the left and right inclination of the working device with respect to the vehicle body 3 by interlocking with a wire 4 based on the vertical angle difference between the left and right lower links 1 and 2 is mounted on the rear side of the seat floor 7 below the pilot's seat 6. Tractor tilt sensor mounting device.