CN217002822U

CN217002822U - Reusable wear alarm sensor

Info

Publication number: CN217002822U
Application number: CN202220962860.3U
Authority: CN
Inventors: 许振飞; 许齐放; 曹华廷; 黄信刚
Original assignee: Linyi Hongtu Electron Co ltd
Current assignee: Linyi Hongtu Electron Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-07-19
Anticipated expiration: 2032-04-25

Abstract

The application discloses a reusable wear alarm sensor, which belongs to the field of automobile sensors and is used for brake alarm, and the reusable wear alarm sensor comprises a push rod which moves relative to a shell along the axis direction of the push rod, wherein the top end of the push rod extends out of the shell, and a spring is sleeved on the part of the push rod, which is positioned in the shell; an electric brush base is further arranged in the shell, an electric brush is connected to the electric brush base, and the electric brush is in sliding contact with the PCB; the PCB is positioned in the shell and is communicated with the cable, the PCB outputs corresponding voltage signals in the process that the electric brush slides from outside to inside, the output voltage signals are gradually increased along with the sliding distance of the electric brush from outside to inside, the shell is connected with the shell base through the supporting base, and the supporting base is provided with a cavity for accommodating the push rod and/or the spring; the cable is fixed on the shell base. The wear alarm sensor can effectively improve the waterproof grade of the wear alarm sensor, and can monitor the wear condition of the brake lining in real time while dealing with different use environments.

Description

Reusable wear alarm sensor

Technical Field

The utility model belongs to the field of automobile sensors, and particularly relates to a reusable wear alarm sensor.

Background

A brake system of an automobile is important for safe driving of the automobile, and the brake system used for the automobile generally includes a drum brake and a disc brake, such as a disc brake, which performs braking by friction between brake pads located at both sides of a disc and the disc. Due to the principle of friction braking, the brake pad is worn during use and the brake clearance between the brake pad and the brake disc is increased, which results in a prolonged preparation time for braking and requires replacement of the brake pad after the brake pad is worn to a certain extent.

The abrasion alarm sensor adopted by the existing vehicle is mostly abraded along with the brake lining block, when the abrasion sensor is abraded to the limit position, an alarm signal is sent to a driver to remind the driver to replace the brake lining block in time, and the abrasion condition of the brake lining block cannot be effectively monitored. Meanwhile, the service environment of the existing wear alarm sensor is different from vehicle to vehicle, and the existing wear alarm sensor should have a better waterproof grade so as to cope with different service environments.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reusable wear alarm sensor, which can effectively improve the waterproof grade of the wear alarm sensor and monitor the wear condition of a brake lining in real time while dealing with different use environments.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a reusable wear alarm sensor comprises a shell, wherein a push rod is arranged inside the shell and moves relative to the shell along the axis direction of the push rod; the top end of the push rod extends out of the shell, a spring is sleeved on the part of the push rod, which is positioned in the shell, and two ends of the spring are respectively contacted with the push rod and the shell; an electric brush base is further arranged in the shell and moves along with the push rod, an electric brush is connected to the electric brush base, and the electric brush is in sliding contact with the PCB; the PCB is positioned in the shell and is communicated with the cable, the PCB outputs corresponding voltage signals in the process that the electric brush slides from outside to inside, the output voltage signals gradually increase along with the distance that the electric brush slides from outside to inside along the PCB, the shell is connected with the shell base through the supporting base, and the supporting base is provided with a cavity for accommodating the push rod and/or the spring; the cable is fixed on the shell base.

As one of the preferable technical schemes of the utility model, the PCB board is connected with the cable through the terminal, and the terminal is connected in the shell through the terminal embedded seat.

As one of the preferable technical schemes of the utility model, the shell is provided with an opening, the opening is connected with a shell cover, a glue containing groove is processed on the connecting end surface of the shell cover and the shell, and the glue containing groove is filled with adhesive.

As one of the preferable technical scheme of the utility model, the shell is provided with a copper sleeve and an O-shaped ring A at the position where the push rod penetrates out, and the O-shaped ring A is positioned between the copper sleeve and the shell.

As one preferable technical solution of the present invention, an annular groove for accommodating an O-ring C is provided on an outer surface of the support base, and the O-ring C is located in the annular groove.

As one of the preferable technical solutions of the present invention, an O-ring B is disposed at a connection position of the housing base and the support base.

As one of the preferable technical scheme of the utility model, the voltage signal range output by the PCB is 0V-5.0V.

As one preferable technical solution of the present invention, the housing base is connected to a fixing clip, and the housing base is connected to the disc brake through the fixing clip.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the push rod drives the electric brush to move along the PCB, so that the PCB can improve an output voltage signal along with the outward movement of the electric brush in the moving process, and further, the real-time monitoring on the abrasion part in the disc brake is realized.

2. According to the utility model, by reasonably setting the distribution form of the sealing rings, the waterproof grade of the abrasion alarm sensor can be effectively improved, so that the stable performance can be ensured under different use environments.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention (including the brake caliper mounting hole).

Fig. 2 is an external structural view of the present invention.

Fig. 3 is a schematic structural view of the present invention with the housing cover removed.

Fig. 4 is a schematic diagram showing the relationship between the compression stroke and the output voltage of the push rod in the present invention.

In the figure: 1. a push rod; 2. a copper sleeve; 3. o-shaped ring A; 4. a split washer; 5. an electric brush base; 6. an electric brush; 7. a PCB board; 8. a spring; 9. a support base; 10. a terminal pre-embedding seat; 11. a terminal; 12. an O-shaped ring B; 13. a housing base; 14. a cable wire; 15. a housing cover; 16. o-shaped ring C; 17. a fixing clip; 18. a housing.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The terms of orientation used in the detailed description are only used to facilitate the understanding of the technical solutions described in the present application by those skilled in the art. Unless otherwise specifically defined, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and their specific meanings in the present invention may be understood by those skilled in the art as appropriate.

As shown in fig. 1 to 3, a reusable wear alarm sensor includes a housing 18, the housing 18, a supporting base 9 and a housing base 13 form a complete closed structure, a PCB 7 is disposed inside the housing 18, the PCB 7 is connected to a cable 14 through a terminal 11 on a terminal pre-embedding base 10, and the cable 14 extends out after passing through the housing base 13. The PCB 7 is in sliding contact with the electric brush 6, the electric brush 6 is fixed on the electric brush base 5, and the electric brush base 5 moves along with the push rod 1. The push rod 1 moves in the axial direction, an O-shaped ring A3 and a copper sleeve 2 are respectively arranged at the position where the push rod 1 extends out of the shell 18, and the O-shaped ring A3 is positioned between the copper sleeve 2 and the shell 18; the push rod 1 is sleeved with a spring 8 at a position inside the shell 18, and two ends of the spring 8 are respectively contacted with the shell 18 and the push rod 1; the tail end of the push rod 1 is positioned in the supporting base 9, and the supporting base 9 is provided with a cavity for accommodating the tail end of the push rod 1. The housing 18 is integral with the support base 9, and the circumferential outer surface of the support base 9 is provided with an annular groove for accommodating an O-ring C16, in which an O-ring C16 is located. An O-shaped ring B12 is arranged at the connecting position of the supporting base 9 and the shell base 13, a fixing clamp 17 is fixed on the shell base 13, a through hole is formed in the fixing clamp 17 and can be fixedly connected to the disc brake through a fastening screw, and the end part of the push rod 1 extending out of the shell abuts against a component which can move linearly when the braking gap is increased.

On the basis of the above embodiments, the present invention continues to describe the technical features and functions of the technical features in the present invention in detail to help those skilled in the art fully understand the technical solutions of the present invention and reproduce them.

As shown in fig. 1 to 3, the utility model is fixed on a brake caliper of a disc brake through a fixing clip 17, the end of the push rod 1 extending out of the housing 18 abuts against an automatic gap adjusting device of the disc brake, when the automatic gap adjusting device is linearly displaced, the spring 8 can drive the push rod 1 to compress inwards, the push rod 1 drives the inner brush 6 to slide on the PCB board 7 from outside to inside, so that the resistance on the resistive layer of the PCB board 7 contacting with the brush 6 is gradually increased from the outer end to the inner end of the PCB board 7, and the output voltage signal is gradually increased and transmitted to an ECU device of an automobile through the cable 14. When the brake pad of the disc brake is worn to a preset wear limit position, the ECU detects that a voltage signal output by the PCB 7 jumps from 3.5V to 4.0V but not more than 5.0V, referring to fig. 4, a corresponding alarm indicator lamp is lightened at an instrument panel of a cab to remind a driver of replacing the brake pad. When the brake pad is replaced, the automatic clearance adjusting device is only required to be restored to the initial state, and the product can be recycled without replacing the sensor.

Specifically, the spring 8 in the initial state is in a natural state, the brush 6 is separated from the resistance layer on the PCB 7 or has a certain gap, when the automatic gap adjusting device at the end of the spring is linearly displaced, the push rod 1 moves inwards along with the spring 8 and compresses the spring, the brush 6 contacts the resistance layer on the PCB 7, and the PCB 7 outputs a linearly increased output voltage outwards during sliding along the resistance layer. The position department that stretches out casing 18 at push rod 1 is provided with O type circle A3, and O type circle A3 can form interference fit with push rod 1 after fixed through the rivet hot of copper sheathing 2, can prevent effectively that water and steam from entering into the inside of casing 18 through push rod 1, avoids influencing the inside PCB board 7 of casing 18 and the cooperation of brush 6.

In the utility model, an O-shaped ring B12 is additionally arranged between the shell 18 and the shell base 13, and the O-shaped ring B12 is fixed between the shell 18 and the shell base in a fixing mode of forced pressing, gluing and the like, so that the waterproof operation at the tail part position is realized. In order to facilitate the placement and installation of the structure comprising the spring 8, the PCB 7, the electric brush 6, the electric brush base 5 and the like in the shell 18, a through hole is processed in the shell 18, a glue containing groove is processed at the end face of the through hole, an adhesive is arranged in the glue containing groove, and the adhesive is used for connecting the shell cover 15. The waterproof structure can meet the waterproof requirement of the middle position of a product by arranging the adhesive, the glue containing groove and other structures.

When the automobile wading prevention device is matched with a mounting hole of a brake caliper, the O-shaped ring C16 is additionally arranged at the position of the supporting base 9, so that the O-shaped ring C16 can enable the supporting base 9 and the mounting hole of the brake caliper to form interference fit, and water can be effectively prevented from entering the brake from the mounting hole when an automobile wades.

Finally, although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such descriptions are merely for clarity and should be taken as a whole by those skilled in the art, and the embodiments may be combined as appropriate to form other embodiments as would be understood by those skilled in the art.

Claims

1. A reusable wear alarm sensor comprises a shell (18), wherein a push rod (1) is arranged inside the shell (18), and the push rod (1) moves relative to the shell (18) along the direction of the axis of the push rod (1); the top end of the push rod (1) extends out of the shell (18), a spring (8) is sleeved on the part, located in the shell (18), of the push rod (1), and two ends of the spring (8) are respectively in contact with the push rod (1) and the shell (18); an electric brush base (5) is further arranged in the shell (18), the electric brush base (5) moves along with the push rod (1), an electric brush (6) is connected to the electric brush base (5), and the electric brush (6) is in sliding contact with the PCB (7); PCB board (7) are located the inside of casing (18) and communicate with cable conductor (14), its characterized in that: the PCB (7) outputs corresponding voltage signals in the process that the electric brush (6) slides from outside to inside, the output voltage signals gradually increase along with the distance that the electric brush (6) slides from outside to inside along the PCB (7), the shell (18) is connected with the shell base (13) through the supporting base (9), and the supporting base (9) is provided with a cavity for accommodating the push rod (1) and/or the spring (8); the cable (14) is fixed on the shell base (13).

2. A reusable wear alarm sensor according to claim 1 wherein: the PCB (7) is connected with a cable (14) through a terminal (11), and the terminal (11) is connected into the shell (18) through a terminal embedded seat (10).

3. A reusable wear alarm sensor according to claim 1 wherein: the shell (18) is provided with an opening, the opening is connected with a shell cover (15), a glue containing groove is machined in the connecting end face of the shell cover (15) and the shell (18), and an adhesive is filled in the glue containing groove.

4. A reusable wear warning sensor as claimed in claim 1, wherein: the shell (18) is provided with a copper sleeve (2) and an O-shaped ring A (3) at the position where the push rod (1) penetrates out, and the O-shaped ring A (3) is located between the copper sleeve (2) and the shell (18).

5. A reusable wear alarm sensor according to claim 1 wherein: the outer surface of the supporting base (9) is provided with an annular groove for accommodating an O-shaped ring C (16), and the O-shaped ring C (16) is positioned in the annular groove.

6. A reusable wear alarm sensor according to claim 1 wherein: and an O-shaped ring B (12) is arranged at the connecting position of the shell base (13) and the supporting base (9).

7. A reusable wear alarm sensor according to any one of claims 1 to 6, characterised in that: the voltage signal range output by the PCB (7) is 0V-5.0V.

8. A reusable wear alarm sensor according to any one of claims 1 to 6, characterised in that: the disc brake is characterized in that a fixing clamp (17) is connected to the shell base (13), and the shell base (13) is connected to the disc brake through the fixing clamp (17).