CN209642324U - The input terminal protecting circuit of numerically-controlled machine tool - Google Patents
The input terminal protecting circuit of numerically-controlled machine tool Download PDFInfo
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- CN209642324U CN209642324U CN201920762941.7U CN201920762941U CN209642324U CN 209642324 U CN209642324 U CN 209642324U CN 201920762941 U CN201920762941 U CN 201920762941U CN 209642324 U CN209642324 U CN 209642324U
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- controlled machine
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- 230000005611 electricity Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model discloses a kind of input terminal protecting circuits of numerically-controlled machine tool, belong to fields of numeric control technique；Specifically；Including control module and transit module；Control module controls the on-off between the output end of transit module and the main control module of numerically-controlled machine tool；When control module receives extraneous low level, be connected between transit module and the main control module of numerically-controlled machine tool, and outer signals are transmitted to the main control module of numerically-controlled machine tool；When control module receives extraneous high level, the main control module of transit module and numerically-controlled machine tool it is separated, outer signals are isolated with the main control module of numerically-controlled machine tool；When there is operation error, protection circuit plays anti-reverse effect, while if also can only damage protection short circuit when extraneous electric current is excessive, the governor circuit without damaging numerically-controlled machine tool only needs the mainboard of worse protection circuit, at low cost.
Description
Technical field
The utility model relates to fields of numeric control technique more particularly to a kind of input terminal protecting circuits of numerically-controlled machine tool.
Background technique
With the development of electronic technology and automatic technology, Numeric Control Technology using more and more extensive, be with microprocessor
Basis take large scale integrated circuit as the numerical control device of mark, introduces and promotes and applies in China's batch production, largely, it
Created condition to the development of machinery manufacturing industry, and bring very big benefit.
Existing is usually that directly external signal is directly inputted into the governor circuit of numerically-controlled machine tool, when normal operating
Being is not in any problem, but if because operation error, such as power supply line are reversely connected or generate suddenly larger current
It is then easy to burn out the governor circuit of numerically-controlled machine tool, it is too high if the governor circuit cost of replacement numerically-controlled machine tool；Therefore urgently
A kind of protection circuit is needed, numerically-controlled machine tool is prevented to be burned.
Utility model content
Shortcoming present in view of the above technology, the utility model provide a kind of input terminal protection electricity of numerically-controlled machine tool
Road connects between the governor circuit and extraneous input terminal of numerically-controlled machine tool, and when there is operation error, protection circuit plays counnter attack
It connects, while if also can only damage protection short circuit when extraneous electric current is excessive, without the governor circuit of damage numerically-controlled machine tool, only
The mainboard of worse protection circuit is needed, it is at low cost.
To achieve the above object, the utility model provides a kind of input terminal protecting circuit of numerically-controlled machine tool, including control mould
Block and transit module；The input terminal of control module receives outer signals, and output end outputs control signals to transit module；Middle revolving die
Block input terminal receives extraneous control signal, and control terminal receives the control signal that control module is sent；Control revolving die in signal control
On-off between the output end of block and the main control module of numerically-controlled machine tool；When control module receives extraneous low level, transit module
It is connected between the main control module of numerically-controlled machine tool, and outer signals is transmitted to the main control module of numerically-controlled machine tool；Work as control module
When receiving extraneous high level, the main control module of transit module and numerically-controlled machine tool it is separated, by outer signals and numerically-controlled machine tool
Main control module isolation.
Wherein, control module includes the control circuit of a plurality of parallel connection, and middle shifting circuit includes the middle shifting circuit of a plurality of parallel connection；Often
Shifting circuit includes input, output end and control terminal in item；Shifting circuit is defeated in the input terminal and single of single control circuit
Enter end and receives single outer signals；And the output end of this control circuit is connect with the control terminal of the middle shifting circuit of this, in this
The output end of shifting circuit and the main control module of numerically-controlled machine tool connect, and form single bar protective circuit.
Wherein, middle shifting circuit includes optocoupler, and optocoupler includes transmitting terminal anode, transmitting terminal cathode, the receiving end pole C, receiving end E
Pole；Transmitting terminal anode is connect with high level output power supply, the output end connection of transmitting terminal cathode and control circuit；The receiving end pole E
Receive extraneous input signal；The receiving end pole C outputs control signals to the main control module of numerically-controlled machine tool.
Wherein, control circuit includes the first triode and the second triode；The emitter of first triode and high level are defeated
Power supply connects out, and base stage is connect with input terminal, and collector is connect with the base stage of the second triode；The collector of second triode with
The control terminal of middle shifting circuit connects；The emitter of second triode is connected to ground.
It wherein, further include diode, diode cathode is connect with the base stage of the first triode, and cathode is connect with input terminal.
Wherein, the first triode and the second triode model S8550.
It wherein, further include light emitting diode, the anode of light emitting diode is defeated with the emitter and high level of the first triode
The rhizoma nelumbinis point connection of power supply out, the tie point coupling of the cathode and input terminal of cathode and diode.
The beneficial effects of the utility model are: the input terminal protecting circuit connect it is defeated in the governor circuit of numerically-controlled machine tool and the external world
Enter between end；Including control module and transit module；Control module controls the master control of the output end and numerically-controlled machine tool of transit module
On-off between module；When control module receives extraneous low level, led between transit module and the main control module of numerically-controlled machine tool
Lead to, and outer signals are transmitted to the main control module of numerically-controlled machine tool；When control module receives extraneous high level, transit module with
The main control module of numerically-controlled machine tool it is separated, outer signals are isolated with the main control module of numerically-controlled machine tool；When there is operation error
When, protection circuit plays anti-reverse effect, while if also can only damage protection short circuit when extraneous electric current is excessive, without
The governor circuit of numerically-controlled machine tool is damaged, the mainboard of worse protection circuit is only needed, it is at low cost.
Detailed description of the invention
Fig. 1 is each module relationship block diagram of the utility model；
Fig. 2 is the middle shifting circuit circuit diagram of the utility model；
Fig. 3 is the control circuit circuit diagram of the utility model；
Fig. 4 is each interface structure chart of the utility model.
Main element symbol description is as follows:
1, control module；2, transit module；3, input signal；4, main control module；U20, optocoupler；Q21, the first triode；
Q22, the second triode；D39, diode；D21, light emitting diode.
Specific embodiment
In order to more clearly state the utility model, the utility model is further described with reference to the accompanying drawing.
Please refer to Fig. 1-Fig. 4, a kind of input terminal protecting circuit of numerically-controlled machine tool, including control module 1 and transit module 2；
The input terminal of control module 1 receives outer signals 3, and output end outputs control signals to transit module 2；2 input terminal of transit module
Extraneous control signal is received, control terminal receives the control signal that control module 1 is sent；Control the defeated of signal control transit module 2
On-off between outlet and the main control module 4 of numerically-controlled machine tool；When control module 1 receives extraneous low level, transit module 2 and number
It controls and is connected between the main control module 4 of lathe, and outer signals 3 are transmitted to the main control module 4 of numerically-controlled machine tool；When control module 1
When receiving extraneous high level, transit module 2 is separated with the main control module 4 of numerically-controlled machine tool, by outer signals 3 and numerically-controlled machine tool
Main control module 4 be isolated.
In the present embodiment, which is located on one piece of individual pcb board, extraneous signal wire by interface and
Piece PCB connection, the pcb board are connected by the governor circuit of another signal line and numerically-controlled machine tool again；The input terminal is protected
Circuit connects between the governor circuit and extraneous input terminal of numerically-controlled machine tool；When there is operation error, protection circuit plays counnter attack
The effect connect because it is unexpected cause to occur input current it is excessive when, protection short circuit also can be only damaged, without damaging numerically-controlled machine tool
Governor circuit, only need the pcb board of worse protection circuit, burn out the master of numerically-controlled machine tool because electric current is big compared to replacement
Plate is controlled, it is at low cost.
In the present embodiment, control module 1 includes the control circuit of a plurality of parallel connection, and middle shifting circuit includes in a plurality of parallel connection
Shifting circuit；Every middle shifting circuit includes input, output end and control terminal；In the input terminal and single of single control circuit
The input terminal of shifting circuit receives single outer signals 3；And the control terminal of the output end of this control circuit and the middle shifting circuit of this
Connection, the output end of the middle shifting circuit of this and the main control module 4 of numerically-controlled machine tool connect, and form single bar protective circuit；Every protection
The single signal wire of circuit protection, it is mutually indepedent between each bar protective circuit；In specific the present embodiment, grafting port is equipped with 14
Spliced eye has 14 signal wires；Corresponding protection circuit is 14；Every signal distinguishes the master of input signal to numerically-controlled machine tool
Circuit is controlled, collective effect realizes the control to numerically-controlled machine tool in governor circuit.
Referring to Fig. 2, middle shifting circuit includes optocoupler U20, optocoupler U20 includes transmitting terminal anode, transmitting terminal cathode, receiving end
The pole C, the receiving end pole E；Transmitting terminal anode is connect with high level output power supply, and the output end of transmitting terminal cathode and control circuit connects
It connects；The receiving end pole E receives outer signals 3；The receiving end pole C outputs control signals to the main control module 4 of numerically-controlled machine tool；When control electricity
When the output end on road exports low level, be connected between the pole C and the pole E of receiving end, outer signals 3 pass sequentially through the receiving end pole E,
The receiving end pole C is transmitted to the governor circuit of numerically-controlled machine tool；It is at this time normal connected state；When the output end of control circuit exports height
Level or it is hanging when, end between the pole C and the pole E of receiving end, be at this time the guard mode under emergency case；If electric current
Or the excessive breakdown optocoupler U20 of voltage or control circuit, only need to change mainboard.
Referring to Fig. 3, control circuit includes the first triode and the second triode Q22；The emitter of first triode with
The connection of high level output power supply, base stage are connect with input terminal, and collector is connect with the base stage of the second triode；Second triode
Collector is connect with the control terminal of middle shifting circuit；The emitter of second triode Q22 is connected to ground；When outer signals 3 input it is low
When level, the first triode ON；High level output power supply is connected with the base stage of the second triode after first triode ON, the
Two transistor bases are high level at this time, and the second triode Q22 is connected therewith；The control terminal of middle shifting circuit be connected to, transfer
The control terminal of circuit obtains low level input；When 3 input high level of outer signals, the cut-off of the first triode；High level output
The base stage of power supply and the second triode is off-state, therefore the second triode Q22 is also switched off；Middle shifting circuit cannot get any
Signal input is vacant state.
It in the present embodiment, further include diode D39, diode D39 anode is connect with the base stage of the first triode, cathode
It is connect with input terminal；Diode D39 plays the role of preventing reversal connection, such as because of accidental operation, accidentally anti-inserted；Diode
D39 effectively prevent external high current to flow into damage electronic component；Wherein, the first triode Q21 and the second triode Q22 type
Number be S8550；In control circuit, it is additionally provided with multiple current-limiting resistances and filter capacitor.
It in the present embodiment, further include light emitting diode, the emitter of the anode and the first triode of light emitting diode D21
It is connect with the rhizoma nelumbinis of high level output power supply point, the tie point of the cathode and input terminal of cathode and diode D39 couples；Work as the external world
When input low level, outer signals 3 are normally input to the governor circuit of numerically-controlled machine tool；For normal operating conditions, at this point, shining two
Pole pipe is also switched on luminous；When the low high flat or cut-off of external world's input, outer signals 3 can not be input to the master control electricity of numerically-controlled machine tool
Road；For abnormal operating state, do not shine at this point, light emitting diode is also switched off；Light emitting diode D21 plays the role of instruction.
The advantage of the utility model is:
1, the input terminal protecting circuit connects between the governor circuit and extraneous input terminal of numerically-controlled machine tool；Including control module
And transit module；Control module controls the on-off between the output end of transit module and the main control module of numerically-controlled machine tool；If outer
When boundary's electric current is excessive, protection short circuit also can be only damaged, the governor circuit without damaging numerically-controlled machine tool only needs worse protection circuit
Mainboard, it is at low cost；
2, diode cathode is connect with the base stage of the first triode, and cathode is connect with input terminal；Diode, which plays, to be prevented instead
The effect connect, such as because of accidental operation, it is accidentally anti-inserted；Diode effectively prevent external high current to flow into damage electronics
Component.
Disclosed above is only several specific embodiments of the utility model, but the utility model is not limited to this,
The changes that any person skilled in the art can think of should all fall into the protection scope of the utility model.
Claims (7)
1. a kind of input terminal protecting circuit of numerically-controlled machine tool, which is characterized in that including control module and transit module；Control module
Input terminal receive outer signals, output end outputs control signals to transit module；Transit module input terminal receives extraneous control
Signal, control terminal receive the control signal that control module is sent；Control the output end and numerically-controlled machine tool of signal control transit module
Main control module between on-off；When control module receives extraneous low level, the main control module of transit module and numerically-controlled machine tool
Between be connected, and outer signals are transmitted to the main control module of numerically-controlled machine tool；When control module receives extraneous high level, transfer
The main control module of module and numerically-controlled machine tool it is separated, outer signals are isolated with the main control module of numerically-controlled machine tool.
2. the input terminal protecting circuit of numerically-controlled machine tool according to claim 1, which is characterized in that control module includes a plurality of
Control circuit in parallel, middle shifting circuit includes the middle shifting circuit of a plurality of parallel connection；Every middle shifting circuit includes input, output end
And control terminal；The input terminal of shifting circuit receives single outer signals in the input terminal and single of single control circuit；And this is controlled
The output end of circuit processed is connect with the control terminal of the middle shifting circuit of this, the master control of the output end and numerically-controlled machine tool of the middle shifting circuit of this
Module connection forms single bar protective circuit.
3. the input terminal protecting circuit of numerically-controlled machine tool according to claim 2, which is characterized in that middle shifting circuit includes light
Coupling, optocoupler include transmitting terminal anode, transmitting terminal cathode, the receiving end pole C, the receiving end pole E；Transmitting terminal anode and high level output electricity
The output end of source connection, transmitting terminal cathode and control circuit connects；The receiving end pole E receives extraneous input signal；Receiving end C is extremely defeated
The main control module of signal to numerically-controlled machine tool is controlled out.
4. the input terminal protecting circuit of numerically-controlled machine tool according to claim 2, which is characterized in that control circuit includes first
Triode and the second triode；The emitter of first triode is connect with high level output power supply, and base stage is connect with input terminal, collection
Electrode is connect with the base stage of the second triode；The collector of second triode is connect with the control terminal of middle shifting circuit；Two or three pole
The emitter of pipe is connected to ground.
5. the input terminal protecting circuit of numerically-controlled machine tool according to claim 4, which is characterized in that it further include diode, two
Pole pipe anode is connect with the base stage of the first triode, and cathode is connect with input terminal.
6. the input terminal protecting circuit of numerically-controlled machine tool according to claim 4, which is characterized in that the first triode and second
Triode model S8550.
7. the input terminal protecting circuit of numerically-controlled machine tool according to claim 5, which is characterized in that further include light-emitting diodes
The anode of pipe, light emitting diode is connect with the emitter of the first triode with the rhizoma nelumbinis of high level output power supply point, cathode and two
The cathode of pole pipe and the tie point of input terminal couple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920762941.7U CN209642324U (en) | 2019-05-25 | 2019-05-25 | The input terminal protecting circuit of numerically-controlled machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920762941.7U CN209642324U (en) | 2019-05-25 | 2019-05-25 | The input terminal protecting circuit of numerically-controlled machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209642324U true CN209642324U (en) | 2019-11-15 |
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ID=68498687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920762941.7U Expired - Fee Related CN209642324U (en) | 2019-05-25 | 2019-05-25 | The input terminal protecting circuit of numerically-controlled machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209642324U (en) |
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2019
- 2019-05-25 CN CN201920762941.7U patent/CN209642324U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191115 |