CN107816500A - A kind of drum brake wear sensor - Google Patents
A kind of drum brake wear sensor Download PDFInfo
- Publication number
- CN107816500A CN107816500A CN201711234341.5A CN201711234341A CN107816500A CN 107816500 A CN107816500 A CN 107816500A CN 201711234341 A CN201711234341 A CN 201711234341A CN 107816500 A CN107816500 A CN 107816500A
- Authority
- CN
- China
- Prior art keywords
- rotor
- fan
- stator
- resistance
- angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006698 induction Effects 0.000 claims abstract description 22
- 230000001360 synchronised effect Effects 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 50
- 229910052751 metal Inorganic materials 0.000 claims description 50
- 239000000758 substrate Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 19
- 239000004744 fabric Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 11
- 238000005299 abrasion Methods 0.000 abstract description 6
- 230000033001 locomotion Effects 0.000 description 15
- 238000009434 installation Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
- F16D66/025—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness sensing the position of parts of the brake system other than the braking members, e.g. limit switches mounted on master cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a kind of drum brake wear sensor, the sensor is made up of stator and rotor, and rotor is in stator and relative to stator rotation；Resistance angle induction device and stationary brushes are installed on stator；Rotor is made up of rotor body, conducting ring and rotor brush, and rotor body is embedded in conducting ring, and rotor brush is arranged on the circumference of conducting ring；Stationary brushes contact connection with conducting ring circumferential end surfaces；Rotor brush is in contact with resistance angle induction device, is sequentially connected electrically resistance angle induction device, rotor brush, conducting ring and stationary brushes, and is outwards exported the induced signal of resistance angle induction device by stationary brushes；The stator is fixed on the camshaft stand of brake, the rotor and camshaft key connection, and with camshaft synchronous rotary.Sensor of the present invention realizes the detection of brake strip abrasion condition and brake state by detecting the resistance variations in braking procedure.
Description
Technical field
The invention belongs to vehicle brake detection technique field, the vehicle suitable for assembling drum brake, and in particular to
A kind of drum brake wear sensor.
Background technology
At present, drum brake at home passenger car, generally use in commercial car, the use ratio especially in commercial car
Highest.Medium and heavy commercial car typically uses Pneumatic braking system, and brake is air pressure S cam drum type brakes, largely assembles hand
Dynamic adjustment arm, needs periodically to carry out manual lash adjustment.Often because brake clearance adjusts not in time, caused brake force declines
Lead to tragic incident.Therefore, GB 7258 and GB 12676 require that associated vehicle installs automatic adjuster for braking clearance, gap is equipped
The vehicle of automatic regulating apparatus, it is not necessary to periodically frequently manually adjusted, but user can not know friction disc wear situation,
Brake drum, brake disc can be damaged under limiting case, causes brake force drastically to decline, braking is ineffective.Therefore, GB 7258 requires dress
With friction disc wear instruction device, to prompt driver's more renewal of facing renewal in time.
Relevant laws and regulations require as follows：
The 7.2.7 of GB 7258 require that the lorry of car, gross mass more than 3500kg and special Operation Van (have a11wheel drive
Except the lorry of function and special Operation Van), gross mass be more than 3500kg semitrailer, and all vehicle transport dangerous goods
All running brakes should equip automatic adjuster for braking clearance.
Car, lorry and the gross mass of the 7.9.5 of GB 7258 installation automatic adjuster for braking clearance are more than 3500kg's
Special Operation Van, when running brake brake lining needs to change, the warning device of optics or acoustics should be used to driving
Driver's alarm on seat.
Define related vehicle brake clearance self-regulating device demand in the 4.2.1.11 of GB 12676, friction plate, brake disc,
Brake drum associated wear detection method.
A kind of brake lining wear indicating device is disclosed in patent document 1 (CN 1187236A), disclosed in the patent
In technical scheme, it is arranged to sense the magnetic regions in corresponding coding road using Hall element, every 1 ° of corner is corresponding one
Coding, but the coding needs to sequentially read, and Hall sensor corresponding to respectively encoding is while produces signal, and brake
Process rate is unstable, sometimes fast and sometimes slow, and signal produces easily causes loss with reading delay, produces false alarm, and the program
Element is more, poor reliability, and cost is high；
A kind of vehicle brake gap of band brake gasket wear warning device of patent document 2 (CN 2612835Y) is adjusted automatically
Whole device, described device are alarmed at maximum cam Work-corner set in advance, and the device is exposed outside, by environmental pollution
Seriously, easily blocked up by plugs such as mud, it is impossible to alarm, and the device is only capable of alarming to greatest wear position, it is impossible to braked
Journey detects and friction disc wear situation is fed back in time；
The invention provides a kind of drum type brake friction pad wear display dress for patent document 3 (A of CN 103775546)
Put, the device is by detecting camshaft degree, and camshaft degree is mechanically transferred into dial plate, observed by dial plate
Friction disc wear situation, the patent can not carry out electronic warning.
The content of the invention
The defects of in the presence of above-mentioned prior art, the invention provides a kind of drum brake wear sensor,
By detecting the resistance variations in braking procedure, the detection of brake strip abrasion condition and brake state is realized, is tied
Figure of description is closed, technical scheme is as follows：
A kind of drum brake wear sensor, the sensor are made up of stator and rotor, and the rotor is embedded in fixed
In son, rotor is relative to stator rotation；Resistance angle induction device and stationary brushes, the resistance angle are installed on stator
Induction installation is electrically connected with externally fed element, and the stationary brushes are connected with external signal acquisition elements signal；The rotor
It is made up of rotor body, conducting ring and rotor brush, the rotor body is embedded in conducting ring, and the rotor brush is arranged on
On the circumference of conducting ring；The stationary brushes contact connection with conducting ring circumferential end surfaces；The rotor brush and resistance angle sense
Answer device to be in contact, be sequentially connected electrically resistance angle induction device, rotor brush, conducting ring and stationary brushes, and by fixed
Sub- brush outwards exports the induced signal of resistance angle induction device；The stator is fixed on the camshaft stand of brake
On, the rotor and camshaft key connection, and with camshaft synchronous rotary.
A kind of drum brake wear sensor, wherein, the resistance angle induction device is resistance Array Substrate, described
Resistance Array Substrate is sector structure, and is distributed along stator in fan-shaped, and the fan-shaped distribution angle of the resistance Array Substrate is convex
The angle of wheel shaft work maximum angle when institute rotor driven rotation；The resistance Array Substrate can power transformation by the sheet type of sector
Resistance and fan-shaped get an electric shock form, and fan-shaped get an electric shock is distributed along the fan shape of sheet type variable resistor, and fan-shaped institute of getting an electric shock is right
The resistance answered changes in equal proportion.
A kind of drum brake wear sensor, wherein, the resistance angle induction device gets an electric shock for metal sector grid,
The metal sector grid gets an electric shock in fan-shaped distribution, and the fan-shaped distribution angle that the metal sector grid gets an electric shock works for camshaft
The angle that institute's rotor driven rotates during maximum angle.
A kind of drum brake wear sensor, wherein, the resistance angle induction device is fan-shaped metal slip, described
Fan-shaped metal slip is distributed in fan-shaped, and the fan-shaped metal slip is a fan-shaped variable resistor, and its resistance is in consecutive variations；Institute
The fan-shaped distribution angle for stating fan-shaped metal slip is the angle of camshaft work maximum angle when institute rotor driven rotation.
A kind of drum brake wear sensor, wherein, on the end face for the assembly both sides that stator and rotor are formed,
The first sealing ring and the second sealing ring are separately installed with, prevents the resistance angle induction device between stator and rotor is exposed from causing
Pollution.
Compared with prior art, the beneficial effects of the present invention are：
1st, drum brake wear sensor of the present invention uses resistance angle induction device, by detecting braking procedure
In resistance variations, can calculate analysis braking procedure in the on-position exception of brake and the abrasion condition of brake strip
And feed back in time, and then match EBS systems and realize braking force distribution control；
2nd, drum brake wear sensor of the present invention is connected by rotor with drum brake camshaft, and detection is convex
Shaft angle change is taken turns, when the camshaft degree that corner reaches brake demarcation changes maximum, carries out brake wear instruction
Alarm, driver's more renewal of facing renewal in time is reminded by vision or audible signal, avoids brake fade；
3rd, drum brake wear sensor element of the present invention is less, using resistance angle induction device, detection knot
Fruit is reliable, and effectively reduces cost；
4th, drum brake both sides of the present invention are sealed using sealing ring to detecting element, are prevented because of exposed pollution
Cause to fail.
Brief description of the drawings
Fig. 1 is that drum brake wear sensor of the present invention assembling uses schematic diagram；
Fig. 2 a are drum brake wear sensor end structure illustration of the present invention；
Fig. 2 b are drum brake wear sensor cross-sectional view of the present invention；
Fig. 3 is the stator structure signal of installation resistance Array Substrate in drum brake wear sensor of the present invention
Figure；
Fig. 4 is rotor structure schematic diagram in drum brake wear sensor of the present invention；
Fig. 5 is the stator structure of installation metal sector grid contact in drum brake wear sensor of the present invention
Schematic diagram；
Fig. 6 is the stator structure signal that fan-shaped metal slip is installed in drum brake wear sensor of the present invention
Figure；
In figure：
1- sensors；2- camshaft stands；3- camshafts；4- bolts；5- spring brake cylinders；
11- stators；The sealing rings of 12- first；13- rotors；The sealing rings of 14- second；
111- sheet type variable resistors；112- sectors contact；113- stationary brushes；
112-1- metal sector grids contact；112-2- sector metal slips；
131- rotor brushes；132- conducting rings；133- rotor bodies.
Embodiment
For technical scheme is expanded on further, with reference to Figure of description, embodiment of the invention is as follows：
Embodiment one
The embodiment of the present invention one discloses a kind of drum brake wear sensor, as shown in figure 1, outside the sensor 1
The stator of circle is fixed on the camshaft stand 2 of drum brake by bolt 4, and the rotor of the inner ring of sensor 1 passes through spline knot
Structure coordinates on the camshaft 3 of drum brake, and the rotor of the inner ring of sensor 1 passes through spline and the synchronous rotary of camshaft 3
Motion.
As shown in figures 2 a and 2b, the sensor 1 is by stator 11, rotor 13, the first sealing ring 12 and the second sealing ring 14
Composition；The stator 11 is provided with connecting hole, the connecting hole and 4 supporting installation of bolt, realizes stator 11 and camshaft stand 2
It is fixedly connected；The stator 11 is cirque structure, and its middle part is provided with rotor mounting hole, and the rotor 13 is pacified embedded at the rotor
Fill in hole, and rotor 13 rotates relative to stator 11, the rotor 13 is circular ring structure, is added on the inside circumference face of rotor 13
Work has a spline structure, and rotor 13 is coaxially connected by the spline structure and camshaft 3；First sealing ring 12 and the second sealing ring 14
It is separately mounted on the end face for the assembly both sides that stator 11 is formed with rotor 13, stator 11 and rotor 13 is coordinated into installation institute
The detection unit of composition is sealed, and to prevent from polluting because detection unit is exposed, even results in failure.
As shown in figure 3, being provided with resistance Array Substrate on the stator 11, the resistance Array Substrate is sector structure,
And be distributed along the anchor ring of stator 11 into sector, fan-shaped distribution angle and the drum brake of the resistance Array Substrate wore
The work maximum angle of journey convexity wheel shaft 3 matches, i.e. the angle of the rotation of the work maximum angle of camshaft 3 when institute rotor driven 3
The as fan-shaped distribution angle of resistance Array Substrate；The resistance Array Substrate is by the fan-shaped He of sheet type variable resistor 111
Fan-shaped 112 compositions that get an electric shock on sheet type variable resistor 111, it is described fan-shaped to get an electric shock 112 along sheet type variable resistor
111 fan shape distribution, and the fan-shaped resistance got an electric shock corresponding to 112 changes in equal proportion, the resistance Array Substrate with outside
Portion's power supply component electrical connection；A stationary brushes 113 are further fixed on stator 11；The stationary brushes and outside electric signal
Acquisition elements signal connects；
As shown in figure 4, the rotor 13 is made up of rotor body 133, conducting ring 132 and rotor brush 131；The rotor
Body 133 is embedded in conducting ring 132, and spline structure, the rotor electricity are machined with the inside circumference face of rotor body 133
Brush 131 is arranged on the circumference of conducting ring 132；The conducting ring 132 contacts connection with the stationary brushes 113 on stator；
The course of work of drum brake wear sensor is as follows described in the present embodiment：
Drum brake wear sensor energization work, resistance Array Substrate is powered in sensor 1；Drum brake is braked
In the course of work, the active force that spring brake cylinder 5 exports changes into torque and is transferred to camshaft 3, convex in the presence of torque
Wheel shaft 3 starts to rotate, and the rotor driven 13 of camshaft 3 rotates, and during being rotated with rotor 13, rotor brush 131 will gradually
Fan-shaped electric shock 112 in contact stator 11 on resistance Array Substrate, rotor brush 131 are in contact with sector electric shock 112 and realize electricity
Conductance leads to, and electric signal will be transmitted by rotor brush 131 to conducting ring 132, conducting ring 132 by with the stationary brushes on stator
Contact connection, finally gives signal output outside electrical signal collection element via stationary brushes 113.
In braking incipient stage and brake release stage, the inside of sensor 1 will externally export break signal or resistance becomes
Change signal, according to the break signal of output or resistance variations signal, the electric signal of output is handled by electronic processors to be obtained
Brake bush abrasion condition information, braking force distribution control is carried out for matching EBS systems；
At the same time, the electric signal exported in real time by sensor 1 can distinguish drum brake whether normal work, system
Whether dynamic device is normally carried out braking or release braking, and whether brake clearance level is normal；When brake clearance is excessive, then cam
The operating angle of axle 3 will become big, and then rotor brush 131 gets an electric shock 112 quantity with fan-shaped in contact with rotor motion process,
The quantity that normal brake application gap lower rotor part brush 131 moves contacted fan-shaped electric shock 112 can be more than；Conversely, rotor brush 131
With the quantity of the fan-shaped electric shock 112 in contact with rotor motion process, can be moved less than normal brake application gap lower rotor part brush 131
The quantity of the fan-shaped electric shock 112 contacted；The electric signal that sensor 1 exports in real time will be driven by the sense of hearing or visual feedback in time
The person of sailing, the timely repair and maintenance of human pilot is reminded, avoid that major accident occurs；In addition, when brake strip wears up to limit position
When putting, the operating angle of camshaft 3 will exceed its maximum functional angle, and now the range of movement of rotor brush 131 will exceed electricity
The distribution of Array Substrate is hindered, causes rotor brush 131 can not touch fan-shaped electric shock 112, now the inside of sensor 1 will place
When off state, braking, breaking alarming is reminded human pilot by the loop of sensor 1.
Embodiment two
The embodiment of the present invention two discloses a kind of drum brake wear sensor, as shown in figure 1, outside the sensor 1
The stator of circle is fixed on the camshaft stand 2 of drum brake by bolt 4, and the rotor of the inner ring of sensor 1 passes through spline knot
Structure coordinates on the camshaft 3 of drum brake, and the rotor of the inner ring of sensor 1 passes through spline and the synchronous rotary of camshaft 3
Motion.
As shown in figures 2 a and 2b, the sensor 1 is by stator 11, rotor 13, the first sealing ring 12 and the second sealing ring 14
Composition；The stator 11 is provided with connecting hole, the connecting hole and 4 supporting installation of bolt, realizes stator 11 and camshaft stand 2
It is fixedly connected；The stator 11 is cirque structure, and its middle part is provided with rotor mounting hole, and the rotor 13 is pacified embedded at the rotor
Fill in hole, and rotor 13 rotates relative to stator 11, the rotor 13 is circular ring structure, is added on the inside circumference face of rotor 13
Work has a spline structure, and rotor 13 is coaxially connected by the spline structure and camshaft 3；First sealing ring 12 and the second sealing ring 14
It is separately mounted on the end face for the assembly both sides that stator 11 is formed with rotor 13, stator 11 and rotor 13 is coordinated into installation institute
The detection unit of composition is sealed, and to prevent from polluting because detection unit is exposed, even results in failure.
As shown in figure 5, being provided with metal sector grid electric shock 112-1 on the stator 11, the metal sector grid touches
Electric 112-1 is distributed in fan-shaped, fan-shaped distribution angle and the drum brake wear process of the metal sector grid electric shock 112-1
The work maximum angle of convexity wheel shaft 3 matches, i.e. the angle of the rotation of the work maximum angle of camshaft 3 when institute rotor driven 3
For metal sector grid electric shock 112-1 fan-shaped distribution angle；The metal sector grid electric shock 112-1 and externally fed element
Electrical connection；A stationary brushes 113 are further fixed on stator 11；The stationary brushes are believed with outside electrical signal collection element
Number connection；
As shown in figure 4, the rotor 13 is made up of rotor body 133, conducting ring 132 and rotor brush 131；The rotor
Body 133 is embedded in conducting ring 132, and spline structure, the rotor electricity are machined with the inside circumference face of rotor body 133
Brush 131 is arranged on the circumference of conducting ring 132；The conducting ring 132 contacts connection with the stationary brushes 113 on stator；
The course of work of drum brake wear sensor is as follows described in the present embodiment：
Drum brake wear sensor energization work, metal sector grid electric shock 112-1 is powered in sensor 1；Drum-type
In the brake course of work, the active force that spring brake cylinder 5 exports changes into torque and is transferred to camshaft 3, in torque
In the presence of camshaft 3 start to rotate, the rotor driven 13 of camshaft 3 rotates, with rotor 13 rotate during, rotor brush
131 will gradually contact metal sector grid electric shock 112-1 in stator 11, rotor brush 131 and metal sector grid electric shock 112-1
Be in contact and realize current lead-through, electric signal will be transmitted by rotor brush 131 to conducting ring 132, conducting ring 132 by with stator
On stationary brushes contact connection, finally via stationary brushes 113 by signal output to outside electrical signal collection element.
In braking incipient stage and brake release stage, the inside of sensor 1 will externally export break signal or resistance becomes
Change signal, according to the break signal of output or resistance variations signal, the electric signal of output is handled by electronic processors to be obtained
Brake bush abrasion condition information, braking force distribution control is carried out for matching EBS systems；
At the same time, the electric signal exported in real time by sensor 1 can distinguish drum brake whether normal work, system
Whether dynamic device is normally carried out braking or release braking, and whether brake clearance level is normal；When brake clearance is excessive, then cam
The operating angle of axle 3 will become big, and then rotor brush 131 gets an electric shock with the metal sector grid in contact with rotor motion process
112-1 quantity, normal brake application gap lower rotor part brush 131 can be more than and move contacted metal sector grid electric shock 112-1
Quantity；Conversely, quantity of the rotor brush 131 with the metal sector grid electric shock 112-1 in contact with rotor motion process, meeting
Contacted metal sector grid electric shock 112-1 quantity is moved less than normal brake application gap lower rotor part brush 131；Sensor 1
The electric signal exported in real time will be reminded the timely repair and maintenance of human pilot, keep away in time by the sense of hearing or visual feedback to driver
Exempt from that major accident occurs；In addition, when brake strip wears up to extreme position, the operating angle of camshaft 3 will exceed it most
Big operating angle, now the range of movement of rotor brush 131 distribution more than metal sector grid electric shock 112-1 is caused
Rotor brush 131 can not be touched metal sector grid electric shock 112-1, off state will be now in inside sensor 1, make
When dynamic, breaking alarming is reminded human pilot by the loop of sensor 1.
Embodiment three
The embodiment of the present invention three discloses a kind of drum brake wear sensor, as shown in figure 1, outside the sensor 1
The stator of circle is fixed on the camshaft stand 2 of drum brake by bolt 4, and the rotor of the inner ring of sensor 1 passes through spline knot
Structure coordinates on the camshaft 3 of drum brake, and the rotor of the inner ring of sensor 1 passes through spline and the synchronous rotary of camshaft 3
Motion.
As shown in figures 2 a and 2b, the sensor 1 is by stator 11, rotor 13, the first sealing ring 12 and the second sealing ring 14
Composition；The stator 11 is provided with connecting hole, the connecting hole and 4 supporting installation of bolt, realizes stator 11 and camshaft stand 2
It is fixedly connected；The stator 11 is cirque structure, and its middle part is provided with rotor mounting hole, and the rotor 13 is pacified embedded at the rotor
Fill in hole, and rotor 13 rotates relative to stator 11, the rotor 13 is circular ring structure, is added on the inside circumference face of rotor 13
Work has a spline structure, and rotor 13 is coaxially connected by the spline structure and camshaft 3；First sealing ring 12 and the second sealing ring 14
It is separately mounted on the end face for the assembly both sides that stator 11 is formed with rotor 13, stator 11 and rotor 13 is coordinated into installation institute
The detection unit of composition is sealed, and to prevent from polluting because detection unit is exposed, even results in failure.
As shown in figure 5, being provided with fan-shaped metal slip 112-2 on the stator 11, the fan-shaped metal slip 112-2 is in
Sector distribution, the fan-shaped metal slip 112-2 is a fan-shaped variable resistor, and its resistance is in consecutive variations；The fan-shaped gold
Category slip ring 112-2 fan-shaped distribution angle and the work maximum angle of drum brake wear process convexity wheel shaft 3 matches,
That is, the angle of the rotation of the work maximum angle of camshaft 3 when institute rotor driven 13 is fan-shaped metal slip 112-2 fan-shaped distribution
Angle；The fan-shaped metal slip 112-2 electrically connects with externally fed element；A stationary brushes are further fixed on stator 11
113；The stationary brushes are connected with the electrical signal collection element signal of outside；
As shown in figure 4, the rotor 13 is made up of rotor body 133, conducting ring 132 and rotor brush 131；The rotor
Body 133 is embedded in conducting ring 132, and spline structure, the rotor electricity are machined with the inside circumference face of rotor body 133
Brush 131 is arranged on the circumference of conducting ring 132；The conducting ring 132 contacts connection with the stationary brushes 113 on stator；
The course of work of drum brake wear sensor is as follows described in the present embodiment：
Drum brake wear sensor energization work, fan-shaped metal slip 112-2 is powered in sensor 1；Drum brake
During device braking operation, the active force that spring brake cylinder 5 exports changes into torque and is transferred to camshaft 3, in the work of torque
Starting to rotate with lower cam axle 3, the rotor driven 13 of camshaft 3 rotates, during being rotated with rotor 13, rotor brush 131
It will be in contact with fan-shaped metal slip 112-2, and be moved along fan-shaped metal slip 112-2, rotor brush 131 and fan-shaped metal
Slip ring 112-2, which is in contact, realizes current lead-through, and electric signal will be transmitted by rotor brush 131 to conducting ring 132, conducting ring 132
By contacting connection with the stationary brushes on stator, finally signal output is adopted to outside electric signal via stationary brushes 113
Collect element.
In braking incipient stage and brake release stage, the inside of sensor 1 will externally export break signal or resistance becomes
Change signal, according to the break signal of output or resistance variations signal, the electric signal of output is handled by electronic processors to be obtained
Brake bush abrasion condition information, braking force distribution control is carried out for matching EBS systems；
At the same time, the electric signal exported in real time by sensor 1 can distinguish drum brake whether normal work, system
Whether dynamic device is normally carried out braking or release braking, and whether brake clearance level is normal；When brake clearance is excessive, then cam
During the operating angle of axle 3 will become big, and then rotor brush 131 is with rotor motion, along the fan-shaped metal slip 112-2's
Movement angle will be greater than movement angle of the normal brake application gap lower rotor part brush 131 along fan-shaped metal slip 112-2；Conversely, turn
Movement angle of the sub- brush 131 along the fan-shaped metal slip 112-2 will be less than normal brake application gap lower rotor part brush 131 along fan
Shape metal slip 112-2 movement angle；The electric signal that sensor 1 exports in real time will be driven by the sense of hearing or visual feedback in time
The person of sailing, the timely repair and maintenance of human pilot is reminded, avoid that major accident occurs；In addition, when brake strip wears up to limit position
When putting, the operating angle of camshaft 3 will exceed its maximum functional angle, and now the range of movement of rotor brush 131 will exceed fan
Shape metal slip 112-2 distribution, cause rotor brush 131 can not touch fan-shaped metal slip 112-2, now sense
Off state will be in inside device 1, during braking, breaking alarming is reminded human pilot by the loop of sensor 1.
In embodiment two and embodiment three, metal sector grid contact 112-1 and fan-shaped metal slip 112-2 is respectively adopted
Instead of the resistance Array Substrate in embodiment one, by effective cost for reducing sensor.
Embodiment one compared with embodiment three, used by embodiment one its fan-shaped contact 112 of resistance Array Substrate pair
The resistance answered changes in equal proportion, and resistance changes point by point in discrete, and the fan-shaped metal slip used in embodiment three
112-2 resistance is in consecutive variations, comparatively speaking, its sector electric shock 112 of resistance Array Substrate used by embodiment one
Detection is more stable, accurate.
Claims (5)
- A kind of 1. drum brake wear sensor, it is characterised in that：The sensor is made up of stator (11) and rotor (13), and the rotor (13) is in stator (11), rotor (13) Rotated relative to stator (11)；Resistance angle induction device and stationary brushes (113) be installed on stator (11), the resistance angle induction device with Externally fed element electrically connects, and the stationary brushes (113) are connected with external signal acquisition elements signal；The rotor (13) is made up of rotor body (133), conducting ring (132) and rotor brush (131), the rotor body (133) it is embedded in conducting ring (132), the rotor brush (131) is arranged on the circumference of conducting ring (132)；The stationary brushes (113) contact connection with conducting ring (132) circumferential end surfaces；The rotor brush (113) is in contact with resistance angle induction device, makes resistance angle induction device, rotor brush (113), conducting ring (132) and stationary brushes (113) are sequentially connected electrically, and are sensed resistance angle by stationary brushes (113) The induced signal of device outwards exports；The stator (11) is fixed on the camshaft stand of brake, the rotor (13) and camshaft key connection, and with convex Wheel shaft synchronous rotary.
- A kind of 2. drum brake wear sensor as claimed in claim 1, it is characterised in that：The resistance angle induction device is resistance Array Substrate, and the resistance Array Substrate is sector structure, and along stator (11) in fan-shaped distribution, the fan-shaped distribution angle of the resistance Array Substrate during camshaft (3) work maximum angle by driving The angle of rotor (3) rotation；The resistance Array Substrate is made up of the sheet type variable resistor (111) and fan-shaped get an electric shock (112) of sector, the sector The fan shape of (112) along sheet type variable resistor (111) of getting an electric shock is distributed, and the resistance corresponding to fan-shaped electric shock (112) is in Equal proportion changes.
- A kind of 3. drum brake wear sensor as claimed in claim 1, it is characterised in that：The resistance angle induction device is that metal sector grid gets an electric shock (112-1), and the metal sector grid gets an electric shock (112-1) It is distributed in sector, when the fan-shaped distribution angle of the metal sector grid electric shock (112-1) is camshaft (3) work maximum angle The angle of institute's rotor driven (3) rotation.
- A kind of 4. drum brake wear sensor as claimed in claim 1, it is characterised in that：The resistance angle induction device is fan-shaped metal slip (112-2), and the fan-shaped metal slip (112-2) is in fan-shaped point Cloth, the fan-shaped metal slip (112-2) are a fan-shaped variable resistor, and its resistance is in consecutive variations；The fan-shaped metal is slided The angle that the fan-shaped distribution angle of ring (112-2) rotates for camshaft work maximum angle when institute rotor driven (13).
- A kind of 5. drum brake wear sensor as claimed in claim 1, it is characterised in that：On the end face for the assembly both sides that stator (11) and rotor (13) are formed, be separately installed with the first sealing ring (12) and Second sealing ring (14), prevent the resistance angle induction device between stator (11) and rotor (13) is exposed from polluting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711234341.5A CN107816500B (en) | 2017-11-30 | 2017-11-30 | Drum brake wear sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711234341.5A CN107816500B (en) | 2017-11-30 | 2017-11-30 | Drum brake wear sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107816500A true CN107816500A (en) | 2018-03-20 |
| CN107816500B CN107816500B (en) | 2024-06-04 |
Family
ID=61606617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711234341.5A Active CN107816500B (en) | 2017-11-30 | 2017-11-30 | Drum brake wear sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107816500B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469606A (en) * | 2019-07-16 | 2019-11-19 | 济南金麒麟刹车***有限公司 | Drum-type heavy type pad wear monitoring sensor, alarm system and its wear monitoring method |
| CN111927908A (en) * | 2020-07-20 | 2020-11-13 | 东风商用车有限公司 | Self-adjusting arm failure alarm of S-cam drum brake |
| CN112253659A (en) * | 2020-10-14 | 2021-01-22 | 何建斌 | Visual brake pad abrasion warning equipment for brake |
| CN114175473A (en) * | 2019-05-10 | 2022-03-11 | 杜博林公司有限责任公司 | System and method for monitoring conditions of through-hole slip ring |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0566006A1 (en) * | 1992-04-13 | 1993-10-20 | KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH | Lining wear detector for an air operated disc brake |
| CN1187236A (en) * | 1995-06-08 | 1998-07-08 | 哈尔德克斯制动产品股份公司 | Brake lining wear indicating device |
| KR20000020898U (en) * | 1999-05-15 | 2000-12-15 | 정몽규 | Abrasion warning means of brake lining for automobile |
| KR20050098321A (en) * | 2004-04-06 | 2005-10-12 | 현대자동차주식회사 | Brake apparatus with sensor for detecting loosing of lining |
| US20080073160A1 (en) * | 2006-09-22 | 2008-03-27 | Hirschmann Automotive Gmbh | Sensor detecting wear in a brake lining of a vehicular brake system |
| CN201106647Y (en) * | 2007-10-10 | 2008-08-27 | 浙江亚太机电股份有限公司 | Interstice self-adjusting device with abrasion alarm and automotive brake having the same |
| CN201858298U (en) * | 2010-07-23 | 2011-06-08 | 浙江大学 | Program control type automobile brake gap automatic adjusting device |
| CN103443497A (en) * | 2011-03-25 | 2013-12-11 | 哈尔德克斯制动产品股份公司 | Drum brake assembly and wear monitoring device for such an assembly |
| KR101429129B1 (en) * | 2013-03-29 | 2014-08-11 | 주식회사 트루윈 | Sensor Module for Wear Sensing Device of Brake Lining |
| CN205503831U (en) * | 2015-12-28 | 2016-08-24 | 上海致远绿色能源股份有限公司 | Compensation arrangement of aerogenerator electric putter brake |
| CN207583901U (en) * | 2017-11-30 | 2018-07-06 | 中国第一汽车股份有限公司 | A kind of drum brake wear sensor |
-
2017
- 2017-11-30 CN CN201711234341.5A patent/CN107816500B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0566006A1 (en) * | 1992-04-13 | 1993-10-20 | KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH | Lining wear detector for an air operated disc brake |
| CN1187236A (en) * | 1995-06-08 | 1998-07-08 | 哈尔德克斯制动产品股份公司 | Brake lining wear indicating device |
| KR20000020898U (en) * | 1999-05-15 | 2000-12-15 | 정몽규 | Abrasion warning means of brake lining for automobile |
| KR20050098321A (en) * | 2004-04-06 | 2005-10-12 | 현대자동차주식회사 | Brake apparatus with sensor for detecting loosing of lining |
| US20080073160A1 (en) * | 2006-09-22 | 2008-03-27 | Hirschmann Automotive Gmbh | Sensor detecting wear in a brake lining of a vehicular brake system |
| CN201106647Y (en) * | 2007-10-10 | 2008-08-27 | 浙江亚太机电股份有限公司 | Interstice self-adjusting device with abrasion alarm and automotive brake having the same |
| CN201858298U (en) * | 2010-07-23 | 2011-06-08 | 浙江大学 | Program control type automobile brake gap automatic adjusting device |
| CN103443497A (en) * | 2011-03-25 | 2013-12-11 | 哈尔德克斯制动产品股份公司 | Drum brake assembly and wear monitoring device for such an assembly |
| KR101429129B1 (en) * | 2013-03-29 | 2014-08-11 | 주식회사 트루윈 | Sensor Module for Wear Sensing Device of Brake Lining |
| CN205503831U (en) * | 2015-12-28 | 2016-08-24 | 上海致远绿色能源股份有限公司 | Compensation arrangement of aerogenerator electric putter brake |
| CN207583901U (en) * | 2017-11-30 | 2018-07-06 | 中国第一汽车股份有限公司 | A kind of drum brake wear sensor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114175473A (en) * | 2019-05-10 | 2022-03-11 | 杜博林公司有限责任公司 | System and method for monitoring conditions of through-hole slip ring |
| CN110469606A (en) * | 2019-07-16 | 2019-11-19 | 济南金麒麟刹车***有限公司 | Drum-type heavy type pad wear monitoring sensor, alarm system and its wear monitoring method |
| CN110469606B (en) * | 2019-07-16 | 2021-06-29 | 济南金麒麟刹车***有限公司 | Drum type heavy piece abrasion monitoring sensor, alarm system and abrasion monitoring method thereof |
| CN111927908A (en) * | 2020-07-20 | 2020-11-13 | 东风商用车有限公司 | Self-adjusting arm failure alarm of S-cam drum brake |
| CN111927908B (en) * | 2020-07-20 | 2021-09-14 | 东风商用车有限公司 | Self-adjusting arm failure alarm of S-cam drum brake |
| CN112253659A (en) * | 2020-10-14 | 2021-01-22 | 何建斌 | Visual brake pad abrasion warning equipment for brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107816500B (en) | 2024-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107816500A (en) | A kind of drum brake wear sensor | |
| EP1830088B1 (en) | Method and device for detecting abnormality of vehicle | |
| US6257374B1 (en) | Brake pad wear sensing system and method | |
| CN102817779B (en) | System for actively monitoring wear on wind turbine brake pads and related methods | |
| US5975250A (en) | Apparatus and method for detecting the thickness of a brake lining | |
| US5253735A (en) | Apparatus to sense and annunciate truck brake condition | |
| CN105190077B (en) | Disk brake including air gap monitoring device and the method for monitoring air gap | |
| US5358075A (en) | Brake movement and adjustment monitoring device | |
| US20160146279A1 (en) | Brake Pad Wear Monitoring System | |
| US20010052258A1 (en) | Axle end wheel sensor for a vehicle, such as a truck or a trailer | |
| US20030192747A1 (en) | Brake shoe proximity sensor | |
| KR960704749A (en) | ELECTROMECHANISCH BETATIGBARESCHEIBENBREMSE | |
| JP5937334B2 (en) | Electric linear actuator | |
| CN105151939B (en) | A kind of method of elevator internal contracting brake abrasion monitoring | |
| CN207583901U (en) | A kind of drum brake wear sensor | |
| US5865543A (en) | Bearing failure detection apparatus | |
| CN109139751A (en) | Arm for automatically regulating clearance of brake with built-in brake pad wear instruction function | |
| CN208900591U (en) | Arm for automatically regulating clearance of brake with built-in brake pad wear instruction function | |
| US3794143A (en) | Anti-skid brake control apparatus for sensing changes in the absolute rotational speed of a vehicle wheel | |
| US3469666A (en) | Clutch release bearing clearance monitor device | |
| CN110469606B (en) | Drum type heavy piece abrasion monitoring sensor, alarm system and abrasion monitoring method thereof | |
| EP4025796B1 (en) | A clutch plate and a method for detecting wear of a clutch plate | |
| KR20050098321A (en) | Brake apparatus with sensor for detecting loosing of lining | |
| CN216131300U (en) | Disc brake capable of monitoring continuous abrasion of friction plate and brake disc | |
| CN201520293U (en) | Automobile brake clearance real-time monitoring and automatic adjusting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |