NO126207B - - Google Patents

Description

Device for mounting on tractors to prevent overturning and tipping.

One of the biggest dangers for the driver of

a tractor is that the tractor can overturn or

steep so that it tips. These accidents have

claimed many casualties. A device according to this invention will stop the tractor before the accident has occurred.

The way it works is as follows:

A switch device 1 with a shape that

a closed hemisphere is almost full of fluid.

There is, however, a small air bubble 2 in the liquid,

so that it works like a Waterpass. In this air bladder 2, a hollow metal ball 3 floats freely. Isolated from the curved hemispherical surface 4, which is one contact, is

attached a metal angle rail 5, — this

is the other contact. The Hollow Metal -

the ball 3 will always stand in the vertical

through the center of the sphere. This Water pass switch is permanently mounted on the tractor. When the tractor takes a critical position

so that there is a risk of overturning or tipping, the hollow metal ball 3 will rest

both against the curved surface of the hemisphere 4 and

against the angle rail 5 and thus stop

the circuit.

This circuit leads to an electromagnet 6 which pulls a rack 7 towards it.

The rack 7 engages with a small

gear 8 which is attached to the shaft 9.

On the shaft 9 inside the pipe 10 is a damper 11. The pipe 10 in which the damper 11 is, is the air intake pipe for the tractor's engine. During normal driving, the damper 11 is open,

but is closed when it reaches the critical position

occurs, and the switch 1 has closed the current circuit to the electromagnet 6. The intake to the engine will then take place through the pipe

12 which is connected to a cylinder 13. In cylinder 13 is a piston 14 with two piston

springs 15. The piston is by a flexible cable 16 in connection with the clutch pedal. Due to the underpressure under the piston 14 in cylinder 13, piston 14 will be pressed into the bottom position and at the clutch the engine will be disengaged.

When piston 14 is in the bottom position, this will open valve 17 to cylinder 18, and piston 19, which is connected to the brake pedal by a flexible cable 20, will be sucked into cylinder 18 due to the negative pressure, and the brakes will be applied. In cylinder 18 is a valve 21 which is opened by the lower part becoming higher when both pistons are in the bottom position. Through this valve 21, the engine receives air so that it does not

stops. All this happens instantly. On

due to the engine being disengaged first, will

the tractor, if it is standing only on the rear wheels, fall down so that it is standing on all four wheels.

In order to get the tractor in drivable condition again, an electromagnet 22 is placed which, when the current is switched off in switch 23, will pull the rack 7 to itself and the damper 11 will again be in the open position. The current circuit of electromagnet 6 is broken in switch 1 because when the motor is disengaged, the hollow metal ball will take a new position.

The invention provides a device that automatically disengages the engine and applies the brakes when the tractor engages one

position that involves the risk of tipping or

capsize. A schematic and highly simplified design example is shown in the drawing.

Claims (1)

Device that is fitted to tractors to prevent overturning and tipping underneath driving where a contact device that is automatically influenced by gravity can cut off an electric current that causes the clutch to be disengaged and the brakes to be applied, characterized by the fact that the contact device comprises a liquid-floating metal ball (3) where an air bladder (2) in the fluid container is always standing at the top, and to which the ball will float up, so that when the container comes into an inclined position, the ball can make contact between a contact (5) isolated in the container for one current pole, and the container, which forms the other current pole, further two electromagnets (6 and 22) which alternately, by means of rack and gear and damper change the intake for the intake air so that intake takes place from two cylinders (13 and 18) with pistons which are connected respectively to the clutch pedal and the brake pedal so that these the pistons due to the negative pressure will be pressed into the bottom position and disengage the motor and the brakes on, — or they allow the intake to take place through the pipe directly in connection with fresh air.