KR20080028741A - Sensing device for differential lock, multiple velocity turn and steering device - Google Patents

Abstract

A sensing device for a differential lock, a multiple velocity turn and a steering device of a tractor is provided to operate and cancel a differential lock and a multiple velocity turn automatically at different two angles. Sensing devices for a differential lock, a multiple velocity turn and a steering device of a tractor includes a pivot metal(1), a target(2) and a hole sensor(4). The pivot metal is installed on one of both ends of a final driving case(X), and rotates when a handle is steered. The target is installed inside the pivot metal and rotates by being interlocked with the pivot metal. The hole sensor is installed to be close to the target to sense it when the target rotates, and outputs a control signal for the operation or cancellation of the differential lock and the multiple velocity turn and the ascending or descending of a three point link device.

Description

SENSING DEVICE FOR DIFFERENTIAL LOCK, MULTIPLE VELOCITY TURN AND STEERING DEVICE}

1 is a front view showing the differential device and the axle housing in which a differential lock, a double turn and a steering device sensing device for a tractor according to the present invention are installed;

Figure 2 is a cross-sectional view taken along line A-A in Figure 1,

3 is a plan sectional view showing the target and the hall sensor in FIG.

Figure 4 is a front sectional view showing the target in Figure 3;

* Explanation of symbols for main parts of the drawings

1: pivot metal 2: target

4: Hall sensor 5, 5 ': magnet

6: Hall IC X: Final Drive Case

D: Differential

The present invention relates to a differential lock, a double turn and a sensing device for steering device of the tractor, and more particularly, to operate or release the differential lock and the double turn by detecting it with one steering hole sensor when the tractor turns left and right. And it relates to a sensing device of the tractor according to be able to raise or lower the three-point linkage device.

In general, a tractor is a farming and transportation means used for farming or transportation in rural areas, the power unit is configured to run at low speed in the paddy field filled with water.

In other words, the engine is equipped with a very strong output so that it can run easily even in the mud, which generates a lot of load during driving.It is equipped with a gearbox of about 12 gears to shift the power transmitted from it. The mounted differential will be installed.

In addition, the tractor has a PTO output shaft is installed to be used by connecting a work machine such as a rotavaator in the rear.

Here, the differential lock function is to allow the tractor to escape from the mud by locking the differential device by equalizing the driving force of the left and right wheels when the tractor is slipping in a place where a heavy load such as Munon is difficult to drive. .

In other words, when the tractor falls into the mud and the like, the wheels on both sides are rotated at the same power while preventing the one-sided wheel from rotating at high speed to facilitate escape from the mud.

The differential lock function is activated when the driver operates the differential lock lever in the driver's seat. When the driver escapes the mud while the differential lock function is in operation, the driver steers the steering wheel. Detect the differential Sherlock by detecting.

Of course, the steering of the handle is to detect the two or more limit switches installed in the axle housing to release the differential lock bar, because the two or more limit switches are installed to rotate the handle in either the left or right direction This can be detected when.

The lower the turning radius of the tractor, the higher the efficiency. If the tractor drives the axle rotation speed of the front axle faster than the rear wheels when turning, the turning radius will be less. In speed turn mode, the speed turn is activated when the tractor turns left or right, and the speed turn is canceled when the tractor drives straight ahead again.

Normally tractors work with a three-point linkage and then work up the lifter when turning, then lower it again after turning. When working with a tractor, the operator is easily tired when repeating the above operations. A tractor equipped with a differential lock, a speed turn and a steering device sensing device detects when the driver turns left or right in the ascending mode and automatically raises the work machine and lowers it when driving straight ahead.

However, when the limit switch is installed to operate the differential lock, the double turn and the steering lift as described above, the differential lock, the double turn and the steering lift operate only at one angle, so the differential lock, double turn and the steering are operated at two different angles. There is a problem that four limit switches must be installed for the lift to work.

Accordingly, an object of the present invention is to solve the above problems, and when the driver steers to the left and right sides to automatically operate and release the differential lock and the speed turn at two different angles, and to raise and lower the three-point link device. The present invention provides a sensing device for differential locks, speed turns and steering lift devices for tractors.

In order to achieve the above object, the present invention, the steering hole sensor is installed in one of the final driving case of both ends of the axle housing in which the differential device is installed in the center, and also the hole of the target installed on the pivoting metal that rotates during steering A sensing device for differential locks, speed turns and steering lift devices of a tractor configured to detect a sensor and release the differential lock, the sensor being installed inside the pivot metal and rotating in accordance with the rotation of the pivot metal and corresponding to the hall sensor. Two sets of magnets each made of NS pole magnets and two sets of magnets installed on the hall sensor to detect the rotation of the magnets in the clockwise and counterclockwise directions when the target is rotated. And Hall ICs.

1 and 2 are a front view and a cross-sectional view of an axle housing in which a differential lock, a speed turn and a steering device sensing device for a tractor according to the present invention are installed, which are installed at one of both ends of the final driving case (X). In addition, the pivot metal (1) to rotate when steering the steering wheel, the target (2) installed in the interior of the pivot metal (1) rotates in accordance with the rotation of the pivot metal (1), the target (2) Hall sensor (4) which is installed in close proximity to detect the rotation of clockwise and counterclockwise direction, and activates or releases differential lock and double speed turn when detecting target (2), and outputs the rising or falling control signal of 3-point linkage. Consists of

That is, when the target 2 is rotated according to the steering, the hall sensor 4 detects two angles of left and right, respectively, and outputs a control signal so that the differential lock of the tractor, the speed turn and the steering lift are operated. And release.

The target 2 and the hall sensor 4 are configured to detect both clockwise and counterclockwise rotation as shown in FIGS. 3 and 4, which are at a position corresponding to the hall sensor 4. Two pairs of magnet parts 5 and 5 'made up of NS pole magnets installed at a predetermined interval apart from the target 2 and the magnets 5 and 5' are respectively fixed to the hall sensor 4 to detect the magnet parts 5 and 5 '. It consists of two Hall ICs 6 spaced apart.

The angles of the magnet parts 5 and 5 'are different from each other in the left side and the right side. This is for correcting that the steering angles of the left side and the right side are different during steering.

The angle of the magnet part 5 on the left side is composed of two magnets to form 20-55 degrees (S1 pole) and 35-55 degrees (N1 pole) with respect to the center line C, and the magnet part 5 'on the right side is Two magnets are arranged to form 17-55 (S2 pole) and 28-55 (N2 pole) degrees.

Here, the S1 pole is to sense the angle of the left 20 degrees, the N1 pole is to sense the left 35 degrees, S2 pole is to sense the right 17.7 degrees, N2 pole is to detect the right 28.6 degrees.

Referring to the operation and effect of the present invention as described above, when the driver is driving in the mud, such as Munnon, and the wheel is idle due to the mud, the driver operates the differential lock lever (not shown) to operate the differential device (D). Will stop the operation.

When the operation of the differential device D is stopped, the wheel of the tractor does not swing so that the tractor escapes from the mud. In this case, the driver does not operate the steering wheel during the tractor's escape.

After the escape of the tractor, the driver releases the differential lock by operating the steering wheel. The differential lock is released when the driver turns the handle left or right.

The lower the turning radius of the tractor, the higher the efficiency. If the tractor drives the axle rotation speed of the front axle faster than the rear wheels when turning, the turning radius will be less. In speed turn mode, the speed turn is activated when the tractor turns left or right, and the speed turn is canceled when the tractor drives straight ahead again.

Normally tractors work with a three-point linkage and then work up the lifter when turning, then lower it again after turning. When working with a tractor, the operator is easily tired when repeating the above operations. A tractor equipped with a differential lock, a speed turn and a steering device sensing device detects when the driver turns left or right in the ascending mode and automatically raises the work machine and lowers it when driving straight ahead.

For example, when the driver steers the steering wheel to the left side, the pivot metal 1 installed in the final driving case X is rotated according to the rotation of the steering wheel, and fixedly installed on the pivot metal 1. The target 2 is rotated together.

That is, the target 2 rotates to the left along with the pivot metal 1, and the two Hall ICs 6 installed on the hall sensor 4 when the target 2 rotates, respectively, target 2. The magnet portion 5 (N1, S1 pole) of the movement will be detected.

When the hall IC 6 detects the movement of the magnet part 5 of the target 2, a signal corresponding thereto, that is, a steering wheel signal is output, and according to the steering signal, differential lock, speed turn and steering of the tractor are output. The lift device is activated or deactivated.

When the differential lock is released, the differential device is activated when the tractor drives again, so that the tractor runs smoothly in a curved driving light. When the turn speed is activated, the turning radius is reduced, which improves the work efficiency. When the steering lift is activated during turning, the work machine is automatically raised and lowered to reduce the repetitive operator's work and provide a comfortable working environment.

Of course, when the driver rotates the steering wheel to the right, the two Hall ICs 6 respectively detect the magnet part 5 '(S2 and N2 poles) on the right side to operate the differential lock, the speed turn and the steering device, or Will be released.

As described above, according to the present invention, when the driver rotates the steering wheel left or right in the differential lock, double speed, and steering mode, the magnetic sensor having a target formed with two magnets and two Hall ICs detects a steering angle. In other words, the operation and operation are convenient by automatically turning on or off the differential lock and the speed turn and steering up and down.

Claims (3)

The tractor is installed at both ends of the central axle housing, and the tractor is configured to detect the rotation of the magnet installed on the rotating pivot metal with the Hall sensor to activate and deactivate the differential lock, speed turn and steering lift. A sensing device for differential lock, speed turn and steering lift apparatus of It is installed inside the pivot metal and rotates in accordance with the rotation of the pivot metal, and is installed at a predetermined distance from the target at a position corresponding to the hall sensor, and two sets of magnet parts each made of NS pole magnets, and the rotation of the target. Sensing device for differential lock, double speed and steering lift device of the tractor, characterized in that it comprises a pair of Hall ICs installed in the Hall sensor to detect the rotation of the magnet in clockwise and counterclockwise rotation. The method of claim 1, Sensing device for differential lock, speed turn and steering lift device of the tractor, characterized in that the angle of the magnet portion is set to be different from the set angle of the left and right to compensate for the difference in the steering angle during the left turn and the right turn. The method of claim 2, The magnet part angle on the left side is composed of two magnets having an S1 pole having 20-55 degrees with respect to the center line C and an N1 pole having 35-55 degrees, and the magnet portion on the right has an S2 pole having 17-55 degrees. Sensing device for differential lock, double speed and steering device of the tractor, characterized in that consisting of two magnets having an N2 pole of 28-55 degrees.

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