CN203519331U - Chain axle fracture monitoring device and cam controller comprising same - Google Patents
Chain axle fracture monitoring device and cam controller comprising same Download PDFInfo
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- CN203519331U CN203519331U CN201320550874.5U CN201320550874U CN203519331U CN 203519331 U CN203519331 U CN 203519331U CN 201320550874 U CN201320550874 U CN 201320550874U CN 203519331 U CN203519331 U CN 203519331U
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Abstract
The utility model relates to a chain axle fracture monitoring device used for a cam controller. The cam controller comprises a camshaft, cams, cam induction switches and a sprocket wheel. The chain axle fracture monitoring device comprises a dynamic sensor, and the dynamic sensor comprises a signal rotor and a dynamic induction part. The signal rotor is arranged on the camshaft, and can rotate with the camshaft to generate dynamic signals. The dynamic induction part is fixedly connected to a cabinet of the cam controller and can sense the dynamic signals generated by the signal rotor. The signal rotor and the dynamic induction part are separately arranged by a certain distance. The improved cam controller in the utility model is of simple structure and reliable operation, and a real-time monitoring function can be effectively achieved. The utility model also provides the cam controller comprising the chain axle fracture monitoring device mentioned above.
Description
Technical field
The utility model relates to chain axle fracture supervising device, and it has and is arranged on punching machine with the safety control function to personal protection, belongs to the technical field of punching machine.The utility model also relates to the cam controller that comprises described chain axle fracture supervising device.
Background technology
In the market, about through-drive chain, detecting, is that inductive switch is arranged near chain, and whether static induction chain exists.
Patent documentation CN2292013 discloses a kind of adjustable cam controller, for pressing machine, belongs to pressing machine upper controller.It is mainly that in pivoting part, main shaft two ends are bearing in by bearing on the coaxial aperture of housing parts base, and cam set is installed on main shaft, every group of corresponding microswitch of cam, and microswitch is arranged on housing parts base plate by switch bracket and switch base.
Patent documentation CN202795037U discloses a kind of mechanical type cam controller pick-up unit, by driving mechanism, by shaft coupling driving device formula cam controller and scrambler, rotated, scrambler is sent the angular velocity of crankshaft information collecting into control system, motion monitoring signal generator collecting crankshaft status signal is sent into control system, photoelectrical position sensor gathers the position of the switch of cam set, by photoelectric signal receiver, send to control system, switch contact sends to control system by the switch folding signal that powers on.Control system, by internal calculation system processing signals, reaches test purpose.
Patent documentation CN103076798A discloses a kind of cam controller detection method, it is characterized in that: the information of adopt PLC controller output velocity of rotation, rotating the number of turns and rotation time is to driving mechanism, driving mechanism is turned round according to certain angular velocity, camshaft by driving mechanism driving cam controller rotates, and cam set and code-disc on camshaft rotate simultaneously; Photoelectric sensor gathers the turn signal of code-disc, input PLC controller; Switch closes signal input PLC controller by establishing by cable of each group cam set; PLC controller will be established by cable and close signal and turn signal compares, and the establishing by cable of switch output closed signal when opening, and the angle that code-disc rotates is the operating angle of cam set.The present invention adopts photoelectric sensor to detect the rotation of code-disc, and signal feedback is processed and feedback test parameter to PLC; The present invention can be by input media and display device monitoring cam controller folding angle and life-span etc., particularly detect precision, risk of disturbance and the permanance etc. of cam set.
The open dual sensor chain break detector of patent documentation CN101934925A.Provide a kind of for detection of also adjusting the device of the tension force of scraping chain.Described device is along with fracture chain leaves backhaul sprocket wheel and enters road, conveying belt top and described fracture chain is identified.When detecting, described chain can stop automatically by armored face conveyor control system, thereby avoids the possibility further damaged, and the alert operator chain that needs repairing.This device also provides a kind of conveying belt, and this conveying belt has travelling carriage at two ends, thereby conveying belt end can be adjusted to independently to every end of coal column when maintaining good chain tension and control.
Patent documentation CN102854837A discloses a kind of adjustable cam controller that detects camming movement and switch adhesion, comprises controller case, is located at cam assembly and switch module in controller case; Described cam assembly comprises that two ends are arranged on the camshaft in controller case by bearing, and multiple cams assembly is installed on camshaft, between adjacent cam pack, is provided with stage clip; Described cam pack comprises external cam, cam ring and the axle sleeve being set on camshaft, and axle sleeve is set on camshaft, and external cam and cam ring are set on axle sleeve; Described switch module comprises a plurality of switches that are arranged on camshaft one side, a switch of every group of corresponding installation of cam pack; Feature is: on described camshaft, code-disc is installed, in a side of described code-disc, the photoelectric sensor that can accept code-disc turn signal is installed by mounting bracket.The photoelectric sensor that the present invention has installed code-disc and moved for detection of code-disc, has formed dynamic monitoring device.
Patent documentation CN202045911U discloses a kind of chain fracture protecting device for cam controller of press; comprise the chain installing around on drive sprocket and driven sprocket; the upside of described chain is provided with the gravity tensioning wheel abutting on chain; the rotating shaft of gravity tensioning wheel is arranged on web joint; on web joint, be uprightly provided with chute; guiding bearing pin fixes through chute and fuselage; gravity tensioning wheel upper end correspondence is provided with by the approach switch of the motor-driven work of PLC controlled pressure, and described approach switch is arranged on fuselage.After chain breakage; gravity tensioning wheel loses the support of chain to it; web joint falls because of Action of Gravity Field; the approach switch that is contained in web joint top is lost induction; PLC stops pressing machine after can't accept normal signal immediately; lathe is shielded, avoid occurring security incident, it is simple in structure, easy to use.
The through-drive chain detection apparatus that this patent is related, be direct-detection by the camshaft of chain-driving, be dynamically to detect in real time camshaft whether to rotate.
Utility model content
It is also whether chain rivet ruptures that the purpose of this utility model is to detect in real time camshaft, so that people and machine are carried out to suitable safeguard protection.
For this purpose, the utility model proposes chain axle fracture supervising device, it is for cam controller, described cam controller comprises camshaft, cam, cam inductive switch and sprocket wheel, wherein, described sprocket wheel is installed in an end of described camshaft, and chain can rotate by camshaft described in described chain wheel drive;
It is characterized in that:
Described chain axle fracture supervising device comprises dynamic pickup, and wherein, described dynamic pickup comprises signal rotor and dynamic inductive means;
Described signal rotor is installed on described camshaft, and can rotate and produce Dynamic Signal with described camshaft;
Described dynamic inductive means is fixedly attached to the cabinet of described cam controller, can respond to the Dynamic Signal that described signal rotor produces, and, can detect in real time described camshaft according to the variation of described Dynamic Signal and whether rotate, and correspondingly to PLC controller, transmit and detect electric signal;
Described signal rotor and described dynamic inductive means are separated by and are determined distance and arrange.
Cam controller after improvement of the present utility model is simple in structure, and reliable in action can play the effect that real-time detection monitors effectively.
The utility model also proposes cam controller, and it comprises chain axle fracture supervising device as herein described.
Accompanying drawing explanation
With reference to accompanying drawing, the description of feature of the present utility model, advantage and the characteristic embodiment by is below able to better understanding, in accompanying drawing:
Fig. 1: the plan view that comprises the cam controller of chain axle fracture supervising device of the present utility model;
Fig. 2: the three-dimensional view that comprises the cam controller of chain axle fracture supervising device of the present utility model.
In the drawings, same or similarly element use same figure notation, different elements is used different figure notations, wherein:
1 camshaft
2 cams
3 signal rotors, rectangle gear ring
4 cam inductive switches
5 dynamic inductive means
Embodiment
As illustrated in fig. 1 and 2, cam controller comprises camshaft 1, cam 2, cam inductive switch 4 and sprocket wheel, and wherein, described sprocket wheel is installed in an end of described camshaft 1, and chain can rotate by camshaft described in described chain wheel drive 1.Therefore camshaft 1 is also chain rivet.
When cam controller breaks down, rotatablely moving of chain rivet just there will be extremely, therefore, this rotatablely moving detected and extremely just can play the effect of safeguard protection.For example, when described chain axle fracture, will cause the dyskinesia of chain rivet, therefore by suitable sensor, be detected, just can find this chain rivet fracture defect.
For this reason, inventor designs the chain axle fracture supervising device for cam controller, as schematically illustrated in Fig. 1, and described chain axle fracture supervising device comprises dynamic pickup, and wherein, described dynamic pickup comprises signal rotor 3 and dynamic inductive means 5;
Described signal rotor 3 is installed on described camshaft 1, and can rotate and produce Dynamic Signal with described camshaft 1;
Described dynamic inductive means 5 is fixedly attached to the cabinet of described cam controller, can respond to the Dynamic Signal that described signal rotor 3 produces, and, can detect in real time described camshaft 1 according to the variation of described Dynamic Signal and whether rotate, and correspondingly to PLC controller, transmit and detect electric signal;
Described signal rotor 3 and described dynamic inductive means 5 are separated by and are determined distance and arrange.That is to say, described signal rotor 3 is not in contact with one another with described dynamic inductive means 5.In fact, described signal rotor 3 can be rotated, and described dynamic inductive means 5 keeps transfixion.
It will be understood by those skilled in the art that Dynamic Signal that described signal rotor (3) produces refers to that signal rotor (3) can change the numerical value of a certain physical parameter that sensor will detect.For example refer to that signal rotor (3) can alternately stop that light passes through and allows light to pass through, this is just equivalent to the Dynamic Signal that signal rotor (3) has produced Push And Release.As mentioned below, rotatablely moving of signal rotor (3) also can change to magnetic flux or electric capacity, and this is just equivalent to produce dynamic magnetic flux or electric capacity signal.Sensor can be converted into corresponding electric signal by various types of Dynamic Signals, is convenient to PLC controller and carries out calculation process, and make suitable operation, and reaching the object of safeguard protection, this safeguard protection is to people or machine is all needed.
According to the first embodiment of the present utility model, described dynamic pickup is position transducer;
Described signal rotor is rectangle gear ring 3, and wherein, described rectangle gear ring 3 comprises rectangle denticle and the rectangle teeth groove being evenly distributed on its circumference;
Described rectangle gear ring 3 is installed on described camshaft 1, and for definite measurement point, the Dynamic Signal that it can alternately change with described camshaft 1 rotation generation rectangle denticle and rectangle teeth groove.Be understandable that, rectangle denticle and rectangle teeth groove alternately change and can change to the numerical value of the measured physical quantity of measurement point, and therefore this rectangle denticle and rectangle teeth groove alternately change and are just equivalent to Dynamic Signal.
Main design idea of the present utility model is: allow a part for driver with camshaft 1 motion, thereby the variation that produces measured physical quantity detects the variation abnormality of described measured physical quantity, just means and mechanical disorder detected.
As the first modification of the first embodiment, described dynamic inductive means 5 is photo-electric sensing elements, and wherein, described photo-electric sensing element comprises light emitting diode and photistor; And, described rectangle gear ring 3 is arranged so that: in described rectangle gear ring 3 rotation processes, its denticle part can be rotated between described light emitting diode and described photistor, and the light of photistor described in the described light emitting diode directive of blocking, and, the teeth groove part of described rectangle gear ring 3 can be rotated between described light emitting diode and described photistor, and therefore the light of described light emitting diode can be irradiated to described photistor.
The principle of work of electro-optical pickoff is as follows:
Signal panels (signal rotor, rectangle gear ring) are plugged between light emitting diode (LED) and photistor (or photodiode).When the light hole on signal panels (teeth groove) rotates between LED and photistor, the light that LED sends will be irradiated on photistor, now photistor conducting, its collector output low level (0.1～0.3V); When the shading light part on signal panels (denticle) rotates between LED and photistor, the light that LED sends just can not be irradiated on photistor, now photistor cut-off, its collector output high level (4.8～5.2V).
If signal panels continuous rotation, light hole and shading light part will alternately turn over LED and printing opacity or shading, and photistor collector will alternately be exported high level and low level.When signal panels rotate with camshaft 1, light hole on signal panels and shading light part just turn between LED and photistor, the light that LED sends will be alternately irradiated on the photistor of signal generator by signal panels printing opacity and interception, in signal transducer, will produce corresponding pulse signal.
Other architectural feature of photoelectric sensor can, referring to prior art, no longer describe in detail here.
The second modification as the first embodiment, described dynamic inductive means 5 is magnetic inductive sensing elements, and wherein, described magnetic inductive sensing element comprises magnetic head, and the tooth top of described magnetic head and described rectangle gear ring 3 or the space between tooth root form the air gap in magnetic circuit.
The principle of work of magnetic induction sensor is as follows:
The path that the magnetic line of force passes is air gap, magnetic head, magnetic conductive board, the permanent magnet S utmost point between air gap, rotor double wedge (the rectangle denticle of rectangle gear ring), rotor double wedge and the stator magnetic head between permanent magnet N pole, stator and rotor.When signal rotor rotates, the air gap in magnetic circuit will periodically change, the magnetic resistance of magnetic circuit and the magnetic flux generating period variation thereupon of passing signal coil magnetic head.According to electromagnetic induction principle, in sensing coil, will respond to generation alternating electromotive force.
When signal rotor rotates in the direction of the clock, the air gap between rotor double wedge and magnetic head reduces, and magnetic circuit reluctance reduces, magnetic flux
increase, flux change rate increases
, induction electromotive force E is just (E>0).When rotor double wedge approaches magnetic head edge, magnetic flux
sharply increase, flux change rate is maximum
induction electromotive force E the highest (E=Emax).Rotor turns over behind b point position, although magnetic flux
still increasing, but flux change rate reduces, so induction electromotive force E reduces.
When rotor aligns to the center line of double wedge and the center line of magnetic head, although the air gap between rotor double wedge and magnetic head is minimum, the magnetic resistance of magnetic circuit is minimum, magnetic flux
maximum, but because magnetic flux can not continue to increase, flux change rate is zero, so induction electromotive force E is zero.
When rotor continues rotation along clockwise direction, when double wedge leaves magnetic head, the air gap between double wedge and magnetic head increases, and magnetic circuit reluctance increases, magnetic flux
reduce
so induction electromotive force E is negative value.When double wedge forwards to will leave magnetic head edge time, magnetic flux
sharply reduce, flux change rate reaches maximum negative value
, induction electromotive force E also reaches maximum negative value (E=-Emax).
As can be seen here, signal rotor often turns over a double wedge, in sensing coil, will produce one-period alternating electromotive force, and a maximal value and a minimum value appear in electromotive force, and sensing coil is also just correspondingly exported an alternating voltage signal.The outstanding advantages of magnetic induction sensor is not need additional power source, and permanent magnet plays a part mechanical energy to be transformed to electric energy, and its magnetic energy can not lose.When camshaft speed changes, the speed that rotor double wedge rotates will change, and the flux change rate in iron core also will change thereupon.Rotating speed is higher, and flux change rate is just larger, and the induction electromotive force in sensing coil is also just higher.When rotating speed is different, the respective change of magnetic flux and induction electromotive force.
Because the air gap between rotor double wedge and magnetic head directly affects the magnetic resistance of magnetic circuit and the height of sensing coil output voltage, therefore in use, the air gap between rotor double wedge and magnetic head can not arbitrarily change.Air gap, as changed, must be carried out in accordance with regulations adjustment, and air gap generally designs within the scope of 0.2～0.4mm.
Other architectural feature of magnetic induction sensor can, referring to prior art, no longer describe in detail here.
The 3rd modification as the first embodiment, described dynamic inductive means 5 is to become medium capacitive sensing parts, and wherein, described change medium capacitive sensing parts comprise capacitor, described capacitor is comprised of two parallel poles, and between described electrode, take air as medium;
Described rectangle gear ring 3 is made by capacitor dielectric material;
In described rectangle gear ring 3 rotary courses, the denticle of described rectangle gear ring 3 and teeth groove alternately enter between two parallel poles of described capacitor, and described denticle and teeth groove are equivalent to dissimilar capacitor dielectric.
Capacitance type sensor is also usually called capacitive level probe by people, the capacitance detecting element of capacitive level probe carries out work according to cylindrical shape capacitor principle, capacitor is comprised of electrode and external electrode in the concentric cylinder pole plate of two insulation, between two, fill while take the electrolyte that specific inductive capacity is e, electric capacity between two cylinders is C=2 π eL/lnD/d, and in formula, L is the length of two parts that overlap; D is the diameter of outside electrode; D is the diameter of inner core electrode; E is the dielectric constant of intermediate medium.In actual measurement, D, d, e are substantially constant, therefore record the height that C can know liquid level, it is easy to use, simple in structure and highly sensitive that this is also that capacitance type sensor has, one of reason of the features such as low price.
Capacitance type sensor has been compared the following advantage with sensors such as resistance-type, inductance types:
(1) high impedance, miniwatt, thereby required Input Forces is very little, defeated people's energy is also very low.Capacitance type sensor is because of electrostatic attraction between charged pole plate minimum (approximately several 10-5N), so required input minimum energy, so suitable especially use solves the low measurement problem of input energy, such as measuring extremely low pressure, power and very little acceleration, displacement etc., can do very sensitively, resolving power is very high, can experience the even less displacement of 0.001 μ m.
(2) temperature stability is good.The capacitance of sensor is general irrelevant with electrode material, is conducive to the material of selecting temperature coefficient low, again because of own generate heat minimum, very micro-to stability influence.
(3) simple in structure, strong adaptability, body to be measured be conductor or semiconductor equalizing can, can in rugged surroundings, work.Capacitive sensor structure is simple, is easy to manufacture, and can do very small and exquisitely, to realize some special measurement; Can be operated in the rugged environments such as high low temperature, intense radiation and high-intensity magnetic field, also can be to being with magnetic workpiece to measure.
(4) dynamic response is good.Because the electrostatic attraction between pole plate is very little, moving part is done very little very thinly, so its natural frequency is very high, and dynamic response time is short, can under the frequency of several megahertzes, work, and is particularly suitable for kinetic measurement, as measuring vibrations, instantaneous pressure etc.
(5) can realize non-cpntact measurement, there is average effect.Such as radial play of the vibration of non-cpntact measurement revolving shaft or bias, small rolling ball bearing etc.When adopting non-cpntact measurement, capacitance type sensor has average effect, can reduce the coarse grade of working surface to the impact of measuring.
The feature of capacitive transducer: electric capacity is little, changes less (PF level).In theory, alternating current bridge can be used as the metering circuit of capacitive transducer, but due to electric capacity and change too littlely, is difficult for realizing.Comprise FM circuit, operational amplifier formula circuit, diode double-T alternating current bridge, pulse width modulation circuit.
As the 4th modification of the first embodiment, described dynamic inductive means 5 is Hall-type sensing elements, and wherein, described Hall-type sensing element comprises Hall integrated circuit, magnetic conduction steel disc and permanent magnet;
When described rectangle gear ring 3 rotates, the denticle of described rectangle gear ring 3 just turns over the air gap between described Hall integrated circuit and described permanent magnet: when described denticle leaves described air gap, the magnetic flux of described permanent magnet just forms loop through described Hall integrated circuit and described magnetic conduction steel disc.
(1) structure of hall sensor and principle of work
Hall camshaft position sensor and other forms of hall sensor are all the sensors of making according to Hall effect.
1) Hall effect: Hall effect (Hall Effect) is that the physicist of U.S. Johns Hopkins University Hall doctor (Dr.E.H.Hall) first found in 1879.When he finds the cuboid platinum conductor of the I that alives to put into magnetic induction density and be the magnetic field of B perpendicular to the magnetic line of force, on two transverse sides of platinum conductor, will produce one perpendicular to the voltage U H of direction of current and magnetic direction, when cancelling magnetic field, voltage disappears immediately.This voltage was called Hall voltage afterwards, and UH is directly proportional to electric current I and magnetic induction density B by platinum conductor.
Utilize the element that Hall effect is made to be called Hall element, utilizing the scales that Hall element is made is hall sensor.Utilize Hall effect not only can detect voltage by connecting and cut off magnetic field, and can detect the electric current flowing through in wire, because wire magnetic field is around strong and weak proportional with the electric current that flows through wire.Since the eighties in 20th century, the hall sensor of applying on automobile and day sharp increase, main cause is that hall sensor has two outstanding advantages: the one, output voltage signal is similar to square-wave signal; The 2nd, output voltage height is irrelevant with the rotating speed of testee.What hall sensor was different from magnetic induction sensor is to need additional power source.
2) hall sensor basic structure: hall sensor mainly forms by triggering impeller (rectangle gear ring), Hall integrated circuit, magnetic conduction steel disc (yoke) and permanent magnet etc.Trigger impeller and be arranged on armature spindle, on impeller, be shaped with blade (denticle).When triggering impeller together rotates with armature spindle (camshaft), blade just rotates between Hall integrated circuit and permanent magnet.Hall integrated circuit is comprised of Hall element, amplifying circuit, mu balanced circuit, temperature-compensation circuit, signal conversion circuit and output circuit etc.
3) hall sensor principle of work: when sensor axis rotates, the blade that triggers impeller just turns over the air gap between Hall integrated circuit and permanent magnet: when blade leaves air gap, the magnetic flux of permanent magnet just forms loop through Hall integrated circuit and magnetic conduction steel disc, now Hall element produces voltage (UH=1.9～2.0V), the transistor turns of Hall integrated circuit output stage, the signal voltage U0 of sensor output is low level (actual measurement shows: when supply voltage Ucc=14.4V or 5V, signal voltage U0=0.1～0.3V).
When blade enters air gap, magnetic field in Hall integrated circuit is by blade bypass, and Hall voltage UH is zero, the transistor cut-off of integrated circuit output level, the signal voltage U0 of sensor output be high level (actual measurement shows: when supply voltage Ucc=14.4V, signal voltage U0=9.8V; When supply voltage Ucc=5V, signal voltage U0=4.8V).
Other architectural feature of hall sensor can, referring to prior art, no longer describe in detail here.
According to the second embodiment, described dynamic pickup is speed pickup, and wherein, the movement velocity that described speed pickup can detect described signal rotor changes.
In robot automation's technology, the velocity survey that rotatablely moves is more, and point-to-point speed is also often measured by rotational speed indirectly.Now widely used speed pickup is DC tachometer generator, rotational speed can be transformed into electric signal.Tachometer requires retention wire sexual intercourse between output voltage and rotating speed, and requires output voltage steepness large, and time and temperature stability are good.Tachometer generally can be divided into two kinds of single flow and AC system.The excitation mode of single flow tachometer can be divided into two kinds of separated exciting and magnetos, and the form such as that armature structure has is trough of belt, hollow, disc type P.e.c., is wherein with slot type the most conventional.
Laser velocimeter sensor
Along with emergence and the cost-effective demand of sophisticated manufacturing now, non-contact speed measurement sensor can slowly replace the contact tachogenerator on present market.And higher, the most frequently used non-contact laser tachogenerator of precision is exactly ZLS-Px aberration tachogenerator on present market.Aberration tachogenerator has two ports: an emission port, sends LED light source; One is the port of taking pictures at a high speed, realizes CCD area high speed imaging contrast, by the image comparison of two times in the short time at the utmost point, differentiates the distance that testee moves, and the algorithm of combined sensor inside is exported the speed of testee in real time.Described tachogenerator comprises: LED light emission port, shooting receiving port, terminals, fixing threaded hole.LED light emission port is launched laser facing to measured object, after reflex to shooting receiving port, receiving signal, passes to signal processor, calculates its speed by algorithm.
Whether ZLS-Px aberration tachogenerator can be measured speed, the length of both direction simultaneously, not only can perceive measured body and stop, and can perceive the direction of motion of measured body.Sensor is fixed on stable support, guarantees that article for rotation rotation process can not produce excessive vibration, thereby can measure corner and the rotating speed that rotates measured body.
Radar velocity measurement sensor
Traditional testing the speed measured mainly with rotate-stationary mode velocity survey and point-to-point speed greatly, but in real industrial automation, have testing the speed of many non-regularities, such as Athletes tests the speed, vehicular traffic tests the speed, in the situations such as golf speed measurement, radar velocity measurement sensor can meet these requirements.
Rotary speed pickup is divided into contact and contactless two classes by installation form.
The rotary speed pickup of contact directly contacts with moving object.When moving object contacts with rotary speed pickup, the roller of friction force band dynamic sensor rotates.Be contained in the rotational pulse sensor on roller, send out a series of pulse.Each pulse is representing certain distance value, thereby just can measure linear velocity.
Contact rotation speed sensor is simple in structure, easy to use.But the diameter of contact roller is to contact all the time with moving object, and the periphery of roller will be worn and torn, thereby affect the girth of roller.And umber of pulse is fixed each sensor.Affect the measuring accuracy of sensor.Improve measuring accuracy and must in secondary instrument, increase compensating circuit.Contact produces slippage unavoidably in addition, the correctness that the existence of slippage is also measured impact.
Non-contact rotary formula speed pickup is with moving object without directly contacting, and non-contact measurement principle is a lot, how on the books in prior art, no longer describes in detail here.
The non-contact rotary speed pickup life-span is long, without increasing compensating circuit.But pulse equivalency is not apart from integral multiple, so speed computing is relatively complicated.
The performance of rotary speed pickup can be summarized as follows:
(1). the output signal of sensor is pulse signal, and its stability is relatively good, be not subject to external noise and disturb, to metering circuit without specific (special) requirements.
(2). relatively simple for structure, cost is low, stable and reliable for performance.Multiple functional microcomputer chip, makes operation transform coefficient be easy to obtain, therefore speed pickup application is at present very general.
According to the 3rd embodiment, described dynamic pickup is angular-rate sensor, and wherein, the rotational speed that described angular-rate sensor can detect described signal rotor changes.
Angular-rate sensor converts the angular velocity of experiencing to the sensor of usable output signal, how on the books in prior art, does not now describe in detail here.
Described cam controller comprises a plurality of cams 2 and a plurality of cam inductive switch 4, and wherein, each cam 2 correspondence a cam inductive switch 4.
Cam controller of the present utility model also comprises chain axle fracture supervising device mentioned above.
Patent documentation CN101934925A, CN101861780A, CN202045911U, CN102854837A, CN103105847A, CN103076798A, CN202795037U, CN2118200 discloses the elements such as cam controller or the device relevant to the utility model, and therefore, the structural relation between the part of not mentioning in this article, element and parts, position relationship, acting force relation, kinematic relation, energy relationship, momentum relation etc. all can be understood with reference to the above-mentioned patent documentation of quoting.The technology contents of the described patent documentation of quoting herein thereby become the part of present patent application file.The in the situation that of needs, all patent documentations of having announced in the related technical field of the utility model all can provide prior art reference to present patent application.
The utility model is used the cam controller after improving, and this controller architecture is simple, and reliable in action can play the effect that real-time detection monitors effectively.This cam controller principle is as follows: rectangle gear ring inductor and cam are arranged on same axle, and axle is rotated by chain-driving, and dynamically inductive means is installed on rectangular teeth inductor below.When lathe is worked, chain-driving camshaft rotates, and the rectangle gear ring inductor during dynamic inductive means rotates by induction, sends real-time dynamic pulse detection signal, and PLC judges that by monitoring this signal whether transmission shaft is normal, plays a protective role.
More than describe preferred specific embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design concept of the present utility model without creative work.Therefore; all technician in the art comply with design concept of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within scope of the present utility model and/or by the determined protection domain of claims.
Claims (10)
1. chain axle fracture supervising device, it is for cam controller, described cam controller comprises camshaft (1), cam (2), cam inductive switch (4) and sprocket wheel, wherein, described sprocket wheel is installed in an end of described camshaft (1), and chain can rotate by camshaft (1) described in described chain wheel drive;
It is characterized in that:
Described chain axle fracture supervising device comprises dynamic pickup, and wherein, described dynamic pickup comprises signal rotor (3) and dynamic inductive means (5);
It is upper that described signal rotor (3) is installed in described camshaft (1), and can rotate and produce Dynamic Signal with described camshaft (1);
Described dynamic inductive means (5) is fixedly attached to the cabinet of described cam controller, can respond to the Dynamic Signal that described signal rotor (3) produces, and, can detect in real time described camshaft (1) according to the variation of described Dynamic Signal and whether rotate, and correspondingly to PLC controller, transmit and detect electric signal;
Described signal rotor (3) and described dynamic inductive means (5) are separated by and are determined distance and arrange.
2. chain axle fracture supervising device according to claim 1, is characterized in that: described dynamic pickup is position transducer;
Described signal rotor is rectangle gear ring (3), and wherein, described rectangle gear ring (3) comprises rectangle denticle and the rectangle teeth groove being evenly distributed on its circumference;
It is upper that described rectangle gear ring (3) is installed in described camshaft (1), and for definite measurement point, the Dynamic Signal that it can alternately change with described camshaft (1) rotation generation rectangle denticle and rectangle teeth groove.
3. chain axle fracture supervising device according to claim 2, is characterized in that: described dynamic inductive means (5) is photo-electric sensing element, and wherein, described photo-electric sensing element comprises light emitting diode and photistor; And, described rectangle gear ring (3) is arranged so that: in described rectangle gear ring (3) rotation process, its denticle part can be rotated between described light emitting diode and described photistor, and the light of photistor described in the described light emitting diode directive of blocking, and, the teeth groove part of described rectangle gear ring (3) can be rotated between described light emitting diode and described photistor, and therefore the light of described light emitting diode can be irradiated to described photistor.
4. chain axle fracture supervising device according to claim 2, it is characterized in that: described dynamic inductive means (5) is magnetic inductive sensing element, wherein, described magnetic inductive sensing element comprises magnetic head, and the tooth top of described magnetic head and described rectangle gear ring (3) or the space between tooth root form the air gap in magnetic circuit.
5. chain axle fracture supervising device according to claim 2, it is characterized in that: described dynamic inductive means (5) is to become medium capacitive sensing parts, wherein, described change medium capacitive sensing parts comprise capacitor, described capacitor is comprised of two parallel poles, and between described electrode, take air as medium;
Described rectangle gear ring (3) is made by capacitor dielectric material;
In described rectangle gear ring (3) rotary course, the denticle of described rectangle gear ring (3) and teeth groove alternately enter between two parallel poles of described capacitor, and described denticle and teeth groove are equivalent to dissimilar capacitor dielectric.
6. chain axle fracture supervising device according to claim 2, is characterized in that: described dynamic inductive means (5) is Hall-type sensing element, and wherein, described Hall-type sensing element comprises Hall integrated circuit, magnetic conduction steel disc and permanent magnet;
When described rectangle gear ring (3) rotates, the denticle of described rectangle gear ring (3) just turns over the air gap between described Hall integrated circuit and described permanent magnet: when described denticle leaves described air gap, the magnetic flux of described permanent magnet just forms loop through described Hall integrated circuit and described magnetic conduction steel disc.
7. chain axle fracture supervising device according to claim 1, is characterized in that: described dynamic pickup is speed pickup, and wherein, the movement velocity that described speed pickup can detect described signal rotor changes.
8. chain axle fracture supervising device according to claim 1, is characterized in that: described dynamic pickup is angular-rate sensor, and wherein, the rotational speed that described angular-rate sensor can detect described signal rotor changes.
9. chain axle fracture supervising device according to claim 1, is characterized in that: described cam controller comprises a plurality of cams (2) and a plurality of cam inductive switch (4), wherein, each cam (2) corresponding a cam inductive switch (4).
10. cam controller, is characterized in that, it comprises the chain axle fracture supervising device described in any one in the claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320550874.5U CN203519331U (en) | 2013-09-05 | 2013-09-05 | Chain axle fracture monitoring device and cam controller comprising same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320550874.5U CN203519331U (en) | 2013-09-05 | 2013-09-05 | Chain axle fracture monitoring device and cam controller comprising same |
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| CN203519331U true CN203519331U (en) | 2014-04-02 |
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| CN201320550874.5U Expired - Fee Related CN203519331U (en) | 2013-09-05 | 2013-09-05 | Chain axle fracture monitoring device and cam controller comprising same |
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| CN (1) | CN203519331U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104354322A (en) * | 2014-09-29 | 2015-02-18 | 扬州大祺自动化技术有限公司 | Electronic cam controller for mechanical pressing machine |
| CN105469557A (en) * | 2016-01-08 | 2016-04-06 | 南通星诺冷冻设备有限公司 | Novel large-chain alarming device |
| CN107544432A (en) * | 2016-06-28 | 2018-01-05 | 发那科株式会社 | Life determining apparatus, life determining method and computer-readable recording medium |
| CN108443017A (en) * | 2018-06-12 | 2018-08-24 | 莱芜环球汽车零部件有限公司 | A kind of new type of cam shaft position sensor |
| CN109164131A (en) * | 2018-07-24 | 2019-01-08 | 彩虹显示器件股份有限公司 | A kind of electronic plane glass heat contraction measuring device and method |
| CN109507225A (en) * | 2018-10-29 | 2019-03-22 | 彩虹显示器件股份有限公司 | A kind of percent thermal shrinkage measuring device and measuring method of high strain-point electronic glass |
| CN113433888A (en) * | 2021-05-22 | 2021-09-24 | 天津中鼎泰克冶金设备有限公司 | Cam controller |
| CN115876464A (en) * | 2023-02-03 | 2023-03-31 | 江苏亚星锚链股份有限公司 | Boats and ships anchor chain fatigue strength detection device |
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2013
- 2013-09-05 CN CN201320550874.5U patent/CN203519331U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104354322A (en) * | 2014-09-29 | 2015-02-18 | 扬州大祺自动化技术有限公司 | Electronic cam controller for mechanical pressing machine |
| CN105469557A (en) * | 2016-01-08 | 2016-04-06 | 南通星诺冷冻设备有限公司 | Novel large-chain alarming device |
| CN105469557B (en) * | 2016-01-08 | 2017-10-03 | 南通星诺冷冻设备有限公司 | A kind of new big chain warning device |
| CN107544432A (en) * | 2016-06-28 | 2018-01-05 | 发那科株式会社 | Life determining apparatus, life determining method and computer-readable recording medium |
| CN108443017A (en) * | 2018-06-12 | 2018-08-24 | 莱芜环球汽车零部件有限公司 | A kind of new type of cam shaft position sensor |
| CN109164131A (en) * | 2018-07-24 | 2019-01-08 | 彩虹显示器件股份有限公司 | A kind of electronic plane glass heat contraction measuring device and method |
| CN109507225A (en) * | 2018-10-29 | 2019-03-22 | 彩虹显示器件股份有限公司 | A kind of percent thermal shrinkage measuring device and measuring method of high strain-point electronic glass |
| CN113433888A (en) * | 2021-05-22 | 2021-09-24 | 天津中鼎泰克冶金设备有限公司 | Cam controller |
| CN115876464A (en) * | 2023-02-03 | 2023-03-31 | 江苏亚星锚链股份有限公司 | Boats and ships anchor chain fatigue strength detection device |
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