CN217155854U

CN217155854U - Crack detector

Info

Publication number: CN217155854U
Application number: CN202220623940.6U
Authority: CN
Inventors: 韩晓峰; 王祥日; 姜腾飞; 张春龙
Original assignee: Shandong Haoxin Machinery Co Ltd
Current assignee: Shandong Haoxin Machinery Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-08-09
Anticipated expiration: 2032-03-22

Abstract

The utility model discloses a crack detector belongs to crackle detection technical field, is provided with the fine motion contact, touches and moves and elastic component in the crack detector casing, and the fine motion contact is fixed to be set up, touches and moves and can reciprocate in the casing, and the elastic component can make to touch and have interval or contact between moving and the fine motion contact, touches a fixedly connected with probe, and the probe stretches out the casing, and fine motion contact electricity is connected with first signal line, touches and moves the electricity and is connected with the second signal line. The utility model discloses a crack detector has or not buckle when passing through the crackle of probe on the detection part for contact or disconnection between touch piece and the fine motion contact piece, and then can control first signal line and second signal line switch-on or disconnection, consequently, can in time detect out the crackle on the part of high-speed rotation type, avoid taking place danger. And the utility model discloses a crack detector structure's simple structure compares no complicated circuit with traditional electronic sensor, low in production cost.

Description

Crack detector

Technical Field

The utility model relates to a crack detection technology field, concretely relates to crack detector.

Background

When the vehicle brakes, the brake pad of the brake caliper vertically presses against the friction surface of the brake disc surface to generate friction force, so as to generate braking torque, and mechanical energy is converted into heat energy, thereby achieving the purpose of decelerating or stopping the vehicle.

The brake disc includes inside and outside disk body and flange, and flange is connected with wheel hub, and interior disk body is connected with flange, and the interior dish face of interior disk body is connected with the interior dish face of outer disk body through the radiation muscle, and the radiation muscle of current brake disc mainly plays the effect of connecting two disk bodies and formation air dispersing channel. When braking, the brake caliper and the brake disc surface rub to generate large friction force and brake torque and release a large amount of heat, namely the temperature of the brake disc is rapidly increased while the brake disc is subjected to the torque, so that the brake disc is easy to deform.

A large number of road test analyses find that the failure mode of the brake disc mainly shows that the disc surface cracks and the disc surface of the brake disc cracks seriously.

In the driving process, the brake disc rotates at a high speed along with the hub, so that cracks are not easy to find in time, and danger is easy to cause.

In the prior art, the technical problem that whether cracks occur on a high-rotating-speed object such as a brake disc or the like is detected in real time is a technical problem in the industry, and the main problems are that the width of the micro cracks is small and the linear velocity is high. The detection device under the existing technical conditions has the defects of unavailable precision, unavailable detection frequency, unavailable automatic identification, complex structure, high detection cost and low economy.

SUMMERY OF THE UTILITY MODEL

For overcoming the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that a crack detector is provided, can in time detect out the crackle on the high-speed operation part, avoid appearing the incident.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a crack detector is characterized in that the crack detector is provided with a plurality of sensors,

the method comprises the following steps: a shell, a micro-motion contact piece, a touch piece and an elastic piece are arranged in the shell, the micro-motion contact piece is fixedly arranged, the touch piece can move up and down in the shell, the elastic piece can enable the touch piece to be spaced or contacted with the micro-motion contact piece,

the touch piece is fixedly connected with a probe, the probe extends out of the shell, the micro contact piece is electrically connected with a first signal line, and the touch piece is electrically connected with a second signal line.

Preferably: the elastic member is provided as a spring.

Preferably: when the probe is not contacted with the part, the spring enables a space to be reserved between the touch part and the micro contact piece, when the probe is contacted with the part and the probe retracts towards the shell, the touch part moves towards the direction of the micro contact piece, and the spring is compressed to enable the touch part to be contacted with the micro contact piece.

Preferably: the micro contact piece is fixed on the shell.

Preferably: the shell comprises a top end cover, a middle cylinder and a bottom end cover, the top end cover protrudes into the middle cylinder to form an upper protruding part, the bottom end cover is provided with a probe hole for the probe to pass through, and the micro-motion contact piece is fixedly arranged at the lower end of the upper protruding part.

Preferably: the touch piece is arranged in an inverted T shape.

Preferably: the inverted T-shaped touch part comprises a bottom platform positioned at the bottom and a column part fixed with the bottom platform, and one end of the probe is fixedly connected to the bottom platform.

Preferably: the spring is located between the upper projection of the top end cap and the base plate.

Preferably: the spring is sleeved outside the column part and the micro contact piece.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

the utility model discloses a crack detector can detect the crackle on the high-speed pivoted part, during the detection part, the probe of crack detector and the measured face contact of part, the probe to return back in the casing, touch the piece to the direction of fine motion contact piece is removed, and spring compression makes touch piece and fine motion contact piece contact, and first signal line and second signal line switch-on, if the rotatory brake disc by when the survey terminal surface produces the crack, the probe receives the hindrance of crackle can make the probe crooked probe even broken, and at this moment, the spring can make touch the piece and keep away from the fine motion contact piece, makes and become contactless (have the interval) between the two, consequently, first signal line and the disconnection of second signal line. Therefore, the crack detector detects the occurrence of the crack by the on or off condition of the first signal line and the second signal line.

The utility model discloses a crack detector structure's simple structure compares no complicated circuit with traditional electronic sensor, and the material cost who uses is low, production simple process. The use and maintenance cost is obviously reduced. The crack detector can be used for detecting micro-crack cracks on parts, is connected with an alarm device and can be used in a matched mode to timely alarm the generation of cracks, and avoids danger.

Drawings

FIG. 1 is a perspective view of the crack detector of the present invention;

FIG. 2 is a schematic cross-sectional view of the crack detector of the present invention (not in operation);

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 2;

FIG. 4 is a state diagram of the crack detector of the present invention during part inspection;

in the figure:

1. a housing; 101. a top end cap; 102. a middle cylinder; 1011. an upper projection; 103. a bottom end cap; 1031. a probe hole; 2. a micro contact piece; 201. a deformable tongue; 3. a touch piece; 4. an elastic member; 5. a first signal line; 6. a second signal line; 7. a probe; 8. a part;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, a casing 1 is provided with a micro contact piece 2, a touch piece 3 and an elastic piece 4, the micro contact piece 2 is fixedly arranged, the touch piece 3 can move up and down in the casing, the elastic piece 4 can enable the touch piece 3 to be spaced from or contacted with the micro contact piece 2,

the touch part 3 is fixedly connected with a probe 7, the probe 7 extends out of the shell 1, the micro contact piece 2 is electrically connected with a first signal wire 5, and the touch part 3 is electrically connected with a second signal wire 6.

The elastic member 4 may preferably be provided as a spring.

When the probe 7 is not contacted with the brake disc, the tension of the spring supports the touch part 3 to prevent the touch part 3 from moving towards the micro contact piece 2, and the spring enables a distance to exist between the touch part 3 and the micro contact piece 2 to prevent the touch part 3 and the micro contact piece 2 from contacting. When the probe 7 is contacted with a brake disc and the probe 7 retracts towards the shell 1, the touch part 3 moves towards the micro contact piece 2, and the spring is compressed to enable the touch part 3 to be contacted with the micro contact piece 2.

The contact or disconnection between the touch part 3 and the micro contact piece 2 can control the connection or disconnection of the first signal wire 5 and the second signal wire 6.

The micro contact piece 2 is fixed on the shell 1. The shell 1 comprises a top end cover 101, a middle cylinder 102 and a bottom end cover 103, wherein the top end cover 101 protrudes into the middle cylinder 102 to form an upper protruding part 1011, the bottom end cover 103 is provided with a probe hole 1031 for the probe 7 to pass through, and the micro-motion contact piece 2 is fixedly mounted at the lower end of the upper protruding part 1011.

The touch piece 3 is arranged in an inverted T shape. The inverted T-shaped trigger 3 includes a base 301 at the bottom and a column portion 302 fixed to the base 301, and one end of the probe 7 is fixedly connected to the base 301.

The spring is located between the upper projection 1011 of the top end cap 101 and the base plate 301, and the spring may be mounted in a variety of ways. One of the installation methods is as follows: a spring may be provided around the post 302 and the micro contact 2.

The spring can be also provided with two or three springs with smaller diameters, the upper end of each spring is fixed on the upper protruding part of the top end cover, the lower end of each spring is abutted against the bottom platform of the touch piece, and the springs are distributed around the column part of the touch piece and the micro-motion contact piece and are not in contact with the column part and the micro-motion contact piece.

The working principle is as follows:

the working process of the crack detector is described by taking the brake disc as an example. I.e. the part 8 is a brake disc. When the crack detector detects a brake disc rotating at a high speed, a probe 7 of the crack detector is contacted with a detected surface of the brake disc, the probe 7 retracts towards the inside of the shell 1, the touch part 3 moves towards the direction of the micro contact piece 2, the spring compresses to enable the touch part 3 to be contacted with the micro contact piece 2, if the first signal wire 5 is communicated with the second signal wire 6,

if the measured end face of the rotating brake disc is cracked, the probe 7 is hindered by the cracks to bend the probe 7 and even break the probe 7, at the moment, the spring can enable the touch part 3 to be far away from the micro touch piece 2, so that the touch part and the micro touch piece are not contacted (have a distance), and therefore the first signal line 5 and the second signal line 6 are disconnected. Therefore, the crack detector detects the occurrence of a crack by the on and off conditions of the first signal line 5 and the second signal line 6.

In order to avoid false alarm caused by abrasion of the crack sensor in long-term use, the micro contact piece 2 can compensate false alarm caused by abrasion of the probe 7. As shown in fig. 3, the micro-contact 2 includes a mounting portion and a deformable tongue 201 at an angle to the mounting portion, and the amount of deformation of the deformable tongue is within a certain range of values.

The utility model discloses a crack detector structure's simple structure compares no complicated circuit with traditional electronic sensor, and the material cost who uses is low, production simple process. The use and maintenance cost is obviously reduced. The method can be suitable for the environment which cannot be adapted to electronic sensors in complex electromagnetic environment, dust, high temperature, severe cold or large temperature difference, humidity condensation and the like. The crack detector can be used for detecting micro-crack cracks on parts, is connected with an alarm device and can be used in a matched mode to timely alarm the generation of cracks, and avoids danger. The probe can also be replaced for measurement, inspection and other scenes.

Different probes can be replaced to realize different functions, and the equipped sensor can also be replaced to realize different purposes. And the design cost of the product is saved. Examples of applications are: the crack detector detects a crack in the vehicle brake disc. If the end face of the brake disc is cracked, the reduction of the braking efficiency can directly influence the running safety of the vehicle. The crack detector is arranged on the end face of the brake disc, can detect end face cracks and immediately output signals to generate an alarm, and helps a vehicle to detect hidden dangers of a brake system in time. Has important significance for guaranteeing the running safety of the vehicle.

The present invention is not limited to the above embodiments, and it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention as defined by the appended claims.

Claims

1. A crack detector is characterized in that,

2. The crack detector of claim 1, wherein: the elastic member is provided as a spring.

3. The crack detector of claim 2, wherein: when the probe is not contacted with the part, the spring enables a space to be reserved between the touch part and the micro contact piece, when the probe is contacted with the part and the probe retracts towards the shell, the touch part moves towards the direction of the micro contact piece, and the spring is compressed to enable the touch part to be contacted with the micro contact piece.

4. The crack detector of claim 3, wherein: the micro contact piece is fixed on the shell.

5. The crack detector of claim 4, wherein: the shell comprises a top end cover, a middle cylinder and a bottom end cover, the top end cover protrudes into the middle cylinder to form an upper protruding part, the bottom end cover is provided with a probe hole for the probe to pass through, and the micro-motion contact piece is fixedly arranged at the lower end of the upper protruding part.

6. The crack detector of claim 5, wherein: the touch piece is arranged in an inverted T shape.

7. The crack detector of claim 6, wherein: the inverted T-shaped touch part comprises a bottom platform positioned at the bottom and a column part fixed with the bottom platform, and one end of the probe is fixedly connected to the bottom platform.

8. The crack detector of claim 7, wherein: the spring is located between the upper projection of the top end cap and the base plate.

9. The crack detector of claim 8, wherein: the spring is sleeved outside the column part and the micro contact piece.