Alarm height adjustable liquid level sensor with liquid storage tank cover assembly

Abstract

The invention discloses an alarm height-adjustable liquid level sensor assembly with a liquid storage tank cover. The liquid level sensor assembly is characterized in that a dustproof ventilation cover is mounted on the upper end face of a sleeve; two conductive metal strips which parallelly extend downwards are fixed in the center of the bottom surface of the dustproof ventilation cover; the upper ends of the conductive metal strips are connected with a harness interface through a connecting wire of a pipeline inside the dustproof ventilation cover; a push rod is mounted inside the sleeve; a flange is arranged at the upper part of the push rod; the flange and the sleeve are matched and are hermetically connected; an external thread is arranged at the middle part of the push rod; the lower end of the push rod penetrates through a central hole of the bottom surface of the sleeve to be sequentially connected with a height adjusting component and a liquid level detection component; the push rod is hollow; a liquid level circuit component is mounted in the push rod; and the lower ends of the conductive metal strips extend from an opening in the top surface of the push rod to the interior of the push rod to be connected with the liquid level circuit component. According to the liquid level sensor assembly, the liquid level alarm height can be freely adjusted, the automobile bump and vibration can be resisted, the envelopment cost of a product is reduced, the development cycle is shortened, and the production and assembly efficiency is further improved.

Description

technical field [0001] The invention relates to an automobile brake liquid storage tank, in particular to an assembly of a liquid level sensor with an adjustable alarm height and a liquid storage tank cover. technical background [0002] With the popularization and application of reed switches in the automotive field, a large number of reed switches are used as liquid level alarm switches in the liquid storage tanks of automobile brake systems. There are two working states of reed switches: the first state is normally off. The second state is the normal-on type, that is, it is disconnected when the alarm occurs. [0003] Usually the reed switch in the first working state is located on the lower surface of the liquid storage tank, which is easy to install and use, but in this state, the alarm system cannot always detect whether the liquid level sensor and the alarm circuit are normal and intact, because once the reed switch Or the wire is damaged, the result is that the liqu...

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Problems solved by technology

[0003] Usually the reed switch in the first working state is located on the lower surface of the liquid storage tank, which is easy to install and use, but in this state, the alarm system cannot always detect whether the liquid level sensor and the alarm circuit are normal and intact, because once the reed switch Or the wire is damaged, the result is that the liquid level alarm circuit is disconnected, and the alarm system will mistakenly think that the liquid storage tank has no alarm

[0004] The reed switch in the second working state is usually located inside the liquid storage tank or on the upper surface outside the liquid storage tank. This state alarm system can not only detect whether the liquid storage tank has an alarm at all times, but also check whether the liquid level sensor and the alarm circuit are In good condition, because once the liquid level sensor or the alarm circuit is damaged, the liquid level alarm circuit will be disconnected and an alarm will be generated, so the second working state has certain advantages, but usually this state generally requires the reed switch sensor Assembling into the interior of the liquid storage tank or welding on the upper surface of the liquid storage tank is not only complicated and difficult to control, but also can only be assembled on a single product, and cannot be adjusted arbitrarily according to the shape of the liquid storage tank and the height of the alarm, which leads to The development cost of the liquid tank is high, and it is very difficult to popularize it in large quantities

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