RU2758530C1 - Element of the braking system of a mobile vehicle - Google Patents

Abstract

FIELD: transport engineering.

SUBSTANCE: invention relates to devices for monitoring the working state of the friction layer of the disc brake pad and can be used in braking systems of mobile equipment. The device consists of a brake disc in contact (during braking) with a brake pad, in the body of which a wear sensor is rigidly fixed, layered in the transverse direction by alternating dielectric and ferromagnetic layers, while each of the ferromagnetic layers is connected by insulated wires with one end of the signal indicator, respectively, the other end of which is connected to the “plus” of the battery. The conductive cores of insulated wires are connected to their corresponding ferromagnetic layers, for example, by means of solder POS-61. The indicators are located in the area of direct visibility of the driver of the vehicle.

EFFECT: expansion of the functionality of the device in terms of tracking the wear process of the brake pad.

1 cl, 1 dwg

Description

The invention relates to devices for monitoring the operating state of the friction layer of the disc brake pads and can be used in brake systems of mobile technology.

Known element of the brake system, signaling the wear of the friction lining of the brake shoe of the disc brake [1]. With a certain degree of friction lining abrasion, a brake system element made of an insulated electrical wire, the end of which is enclosed in a dielectric tip fixed to the brake shoe, comes into contact with a metal rotating brake disc and closes the electrical circuit. An electrical signal is sent to the electronic control unit, on the front panel of which a light indication of the wear of the friction lining of the brake pad is turned on.

The disadvantages of this technical solution include the impossibility of tracking the wear process during the entire operation of the brake pad, as well as the unreliable fastening of the sensor in the hole of the pad.

It is also known a technical solution [2], in which an element of the brake system containing an insulated electrical wire, one end of which is enclosed in a dielectric tip, fixed in a hole on the brake shoe due to the elastic properties of the tip material, and the other end is electrically connected to a wear indicator, which is different in that the mounting part of the dielectric tip is made in the form of annular conical teeth of the "ruff" type

The disadvantages of this technical solution include the inability to track the wear process during the entire operation of the brake pad.

The technical result of the proposed invention is to expand the functionality of the device in terms of tracking the process of brake pad wear.

The essence of the proposed invention lies in the fact that the implementation of the wear sensor as a composite - from sequentially alternating conductive and non-conductive electricity parts, the conductive parts of which are connected through light indicators with the vehicle battery - allows you to monitor the process of wear of the brake pad of the vehicle directly during its operation. In this case, the hardness and / or thickness of the electrically conductive parts of the sensor can be selected in accordance with the gradation of "acceptable", "acceptable" and "critical" wear.

The technical result is achieved by the fact that in an element of the brake system of a mobile vehicle containing a wear sensor made in the form of annular conical teeth of the "ruff" type, each annular conical tooth is separated from the adjacent one by a dielectric layer, and is connected by an insulated electric wire with a light indicator, the second output of which is connected to the positive pole of the vehicle battery.

The design of an element of the brake system, signaling the wear of the friction lining is illustrated by the figure, where the following designations are introduced:

1 - brake disc;

2 - brake shoe;

3 - wear gauge, made type-setting in the form of washers with conical ring teeth of the "ruff" type;

4, 5 - dielectric layers;

6, 7, 8 - ferromagnetic layers;

9, 10, 11 - insulated wires;

12, 13, 14 - signal indicators;

15 - battery.

The device consists (Fig.) Of a brake disc 1 in contact (during braking) with a brake shoe 2, in the body of which a wear sensor 3 is rigidly fixed, interlayered in the transverse direction by alternating dielectric 4, 5 and ferromagnetic layers 6, 7, 8, at each of the ferromagnetic layers 6, 7, 8 is connected by insulated wires 9, 10, 11 with one end of the signal indicator 12,13,14, respectively, the other end of which is connected to the "plus" of the battery 15. Conductive cores of insulated wires 9, 10, 11 are connected to the corresponding ferromagnetic layers 6, 7, 8, for example, by means of POS-61 solder. Indicators 12, 13, 14 are located in the direct visibility of the vehicle driver.

The operation of the device is carried out as follows: when the vehicle is braking, the brake shoe 2 is pressed by the caliper (not shown in the figure) to the brake disc 1, while the ferromagnetic layer 8 of the wear sensor 3, connected by an insulated wire 9 s, comes into direct contact with the end surface of the brake disc 1 signal indicator 12, the output of which is connected to the "plus" of the battery 15, thereby closing the electrical circuit, as a result of which the signal indicator 12 starts to glow.

As the brake pad 2 and, accordingly, the ferromagnetic layer 8 of the wear sensor 3 wear out, there comes a moment when the thickness of the ferromagnetic layer 8 becomes zero and the electrical circuit, including wire 9, signal indicator 12 and battery 15, opens - as a result, signal indicator 12 stops glowing when the vehicle is braking.

A thin and soft dielectric layer 5 of the wear sensor 3 is quickly abraded by friction against the end surface of the brake disc 1, after which the next ferromagnetic layer 7 of the wear sensor 3 comes into direct contact with the brake disc 1, connected by an insulated wire 10 with a signal indicator 13, the output of which connected to the "plus" of the battery 15, thereby closing the electrical circuit, as a result of which the signal indicator 13 starts to glow.

As the brake pad 2 and, accordingly, the ferromagnetic layer 7 of the wear sensor 3 wear out, there comes a moment when the thickness of the ferromagnetic layer 7 becomes zero and the electrical circuit including wire 10, signal indicator 13 and battery 15 opens - as a result, signal indicator 13 stops glowing when the vehicle is braking.

Further, the processes of wear of the dielectric layer 4 of the wear sensor 3 and the ferromagnetic layer 6 are repeated in the sequence described above. As a result of the wear of the last ferromagnetic layer 6, the indicator 14, connected to it by wire 11, stops glowing due to the break in the electrical circuit “layer 6-wire 11-indicator 14-battery 15”, and the driver of the vehicle decides to replace the brake pad 2 with a new one.

The gradation of the wear of the brake pad 2, assessed by turning off the indicators 12, 13, 14, can be performed, for example, on the scale of "initial wear", "allowable wear", "critical wear", respectively.

Thus, the proposed element of the braking systems informs the driver about the degree of wear of the brake pad 2 during its operation.

Sources of information

1. Indicator of wear of the front brakes of the car VA3-2110. Assembly drawing 2110-3501093.

2. Patent No. 16299 F16D 66/02 (2000.01) Element of the brake system / Bolshakov V.N., Andrievsky G.S. Application 2000110181/20, 25.04.2000, publ. 12/20/2000

Claims (1)

A device for monitoring the operating state of the friction layer of the disc brake pads of the mobile vehicle brake system, containing a wear sensor made in the form of annular conical teeth of the "ruff" type, characterized in that each conical ring tooth is separated from the adjacent one by a dielectric layer and connected by an insulated electric a wire with a light indicator, the second output of which is connected to the positive pole of the vehicle battery.

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