SU1689115A1 - Device for indicating pressure drop in vehicle tyres - Google Patents

Abstract

The invention relates to a vehicle, in particular to a tire pressure monitoring device for a moving vehicle. The goal invented rg (and - simplifying the design and increasing reliability. The device contains a flexible, other element located close to the CA O EC ÖRoj - from a controlled tire attached to the upper end of the fixed part of the vehicle perpendicular to the road surface a gap of about 1/3 of the wheel thickness, a closing contact in the electrical circuit of the display circuit, a second flexible elastic electrically conductive element, one end fixed on the wheel rim from the first element and the other being pressed against the side surface of the tire, which, when the flat tire is deformed at the point of contact with the road, begins to make contact with the lower end of the first flexible elastic element during the movement, this produces an audible signal and an RS-flip-flop in the electronic display of the flat tire 2 n f-ly, 2 ill. with with

Description

The invention relates to a vehicle, in particular to tire pressure monitoring devices of moving vehicles.

The aim of the invention is to simplify the design and increase reliability.

FIG. 1 shows a diagram of the structure of the device; Fig. 2 is a schematic diagram of the display system.

The device contains an element 1, made in the form of a flexible elastic steel strip, glued to an insulating gasket 2 fixed to the stationary part of the vehicle with a rivet 3. This same rivet connects the terminal 4 of the wire 5 going into the display circuit with element 1. Second element 6 is also made of a flexible elastic steel strip which is pressed by its plane at one end to the side surface of the tire 7, and the other end is riveted to the rim 9 by means of a rivet 9. The wire 5 from the element 1 of each of the 4 wheels is fed to the entrance at S the corresponding RS flip-flop 10. All these inputs through the first resistors 11 are connected to the positive power source, to which all the inputs R RS-flip-flop 10 are also connected via the second resistor 12 and through the normally open contacts of the button 13 Reset is ground. The cathodes of each of the LEDs 14 are connected to the inverting outputs of the respective RS flip-flops 10, and their anodes are connected via a third resistor 15 to the power source.

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The device works as follows.

When the tire pressure drops while the vehicle is moving, it expands at the point of contact with the road, periodically driving element 6 into contact with element 1. At the same time, there are loud characteristic clicks indicating an urgent need to stop, and input S of one of the RS triggers 10 is briefly grounded. This trigger is set and a low logic level appears at its inverting output. A current flows from the plus power source through the resistor 15 to this LED 14. A setodio 14 shines, indicating a flat tire. After raising the tire pressure to the normal level, the display circuit returns to its original state (the LEDs 14 are not illuminated) by pressing the Reset button 13, through which all the trigger inputs R are grounded.

The methods of fastening the second element 6 may be different. It can be worn on one end of the wheel mounting studs on the brake drum, and the other end will go to the inner side surface of the tire through the gap between the brake drum and the wheel disk. The elements 6 can be fastened with a clamp on the circumference of the brake drum or in the same way as the balancing weights are fastened (the steel strip of the second element can be combined with the balancing weight). Elements 6 can also be made of steel wire or cable. The first element 1 is best made from a steel elastic strip in order to ensure its maximum flexibility in the longitudinal (in the direction of travel) direction and minimum lateral play in order to obtain maximum reliability and accuracy of the device.

Claims (2)

1. A device for signaling the pressure drop in the tires of the wheels of the transport The module contains a date-strain deformation fixed on the i-baud of each monitored wheel, interacting with the tire tire and having a movable element extending to the side of the wheel as the tire deforms increasing, and the display unit included in the electrical signaling circuit , movable and fixed electrical contacts, the first of which responds to the position of the sensor, and the second is suspended on a fixed part of the vehicle to the side of the wheel, characterized in that. to simplify design and increase reliability, the movable electrical contact is combined with the movable element of the sensor and is made in the form of a flexible in the plane, perpendicular to the rolling plane of the wheel, the conductive element, and the fixed contact is made in the form of a flexible conductor tape in a plane parallel to the plane of rolling of the wheel. 2. The device according to p. 1, characterized in that it is equipped with additional moving contacts distributed around the circumference. 3, with Paragraph on PP. 1 and 2. characterized in that the display unit contains RS-flip-flops, made on elements 2I-NOT, and LEDs on the number of controlled wheels, while fixed electrical contacts are connected to the S-inputs of the corresponding triggers connected through the first resistors with a plus power supply which, via the second resistors, is connected to the R inputs connected through the normally open contacts of the Reset button to the ground, and the inverting outputs of the flip-flops are connected via reverse-connected LEDs, the anodes of which are connected to the plus through the third resistor power source. 2 four ///////////. FIG. I CSpoc