CN203722203U - Industrial-vehicle circuit overload protector - Google Patents
Industrial-vehicle circuit overload protector Download PDFInfo
- Publication number
- CN203722203U CN203722203U CN201420083229.1U CN201420083229U CN203722203U CN 203722203 U CN203722203 U CN 203722203U CN 201420083229 U CN201420083229 U CN 201420083229U CN 203722203 U CN203722203 U CN 203722203U
- Authority
- CN
- China
- Prior art keywords
- resistance
- circuit
- integrated circuit
- industrial vehicle
- industrial
- 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.)
- Expired - Lifetime
Links
- 230000001012 protector Effects 0.000 title claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims description 19
- 239000003381 stabilizer Substances 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The utility model provides an industrial-vehicle circuit overload protector. An input end of the overload protector is connected with a storage battery and an output end of the overload protector is connected with a load. The overload protector includes a casing. An integrated circuit board is arranged in the casing. The integrated circuit board is sequentially connected in series with a third resistor, a button switch and a first resistor. An output end of the third resistor is connected with a second resistor and a transistor switch. An output end of the second resistor is connected with an electronic switch of the integrated circuit board. The transistor switch is connected with a forth resistor. The industrial-vehicle circuit overload protector is used for protecting the safety of an industrial-vehicle circuit and when the circuit is overloaded or opened, the protector cuts off the circuit automatically so as to maintain the security of the circuit and a load and thus the security of the industrial-vehicle circuit is improved; and after faults are cleared, resetting can be performed directly and thus the work efficiency is improved and replacement and maintenance are reduced.
Description
Technical field
The utility model belongs to industrial vehicle circuit protection technical field, is specifically related to a kind of industrial vehicle overload circuit protector.
Background technology
High speed development along with modern industry, industrial vehicle is as important logistics transportation instrument in current modern industry production, application is more and more extensive, and application operational environment also becomes increasingly complex, thus to industrial vehicle safe, intelligent, comfortableness etc. more and more higher requirement has also been proposed.
At present in order to guarantee the fail safe of industrial vehicle; at industrial vehicle general supply circuit, generally adopt fusible line as total insurance; when overload or short circuit occur industrial vehicle electric wiring, fusible line self-heating fuses and cuts off the electricity supply, thereby reaches the effect of protective circuit.But also there is defect in this, be first can not automatically recover after circuitry cuts, the fusible line that must more renew just can work on; Next is that fusible line inconvenience is fixing, pulls on wire harness, if there is greasy dirt on wire harness, during the fusing of fusible line self-heating, very likely causes wire harness spontaneous combustion, has potential safety hazard.
Utility model content
The utility model, in order to solve the problems of the technologies described above, provides a kind of industrial vehicle overload circuit protector, to improve the convenience of fail safe and the maintenance of industrial vehicle circuit.
The technical solution of the utility model is: a kind of industrial vehicle overload circuit protector, and the input of described overload protective device is connected with storage battery, output is connected with load; Described overload protective device comprises housing, in described housing, is provided with surface-mounted integrated circuit, and described surface-mounted integrated circuit is connected with the 3rd resistance, push-button switch, the first resistance successively; The output of described the 3rd resistance is connected with the second resistance, transistor switch respectively, and the output of described the second resistance is connected with the electronic switch of described surface-mounted integrated circuit, and described transistor switch is connected with the 4th resistance.
Further, the input of described the second resistance is connected with for the electronic switch of surface-mounted integrated circuit being carried out to the voltage-stabiliser tube of pressure limiting; The voltage of described voltage-stabiliser tube is for being not more than 6V.
Further, the 1st pin of described surface-mounted integrated circuit is connected with battery positive voltage, the 2nd, 3 pin are connected with the 3rd resistance, load respectively, the 4th pin is connected with battery terminal negative, the 5th pin is connected with the second resistance; The other end of described load is connected with the 4th resistance; Described voltage-stabiliser tube, transistor switch are all connected with battery terminal negative with the 4th resistance.
Further, the rated current of described overload protective device is that 80A, ambient temperature are that-40 ℃～80 ℃, contact resistance are less than 40m Ω.
This new real novel overload protective device is fixedly mounted on the appliance mounting panel on the storage battery side under the Engine Casing on industrial vehicle by its housing, then is connected with vehicle circuitry.Also other is convenient to the position of installation and close as far as possible battery positive voltage can be arranged on as required industrial vehicle.When industrial vehicle circuit overloads, this overload protective device carries out automatic shutdown circuit, keeps vehicle circuitry and the load appliance safety of industrial vehicle; After fault is got rid of, the push-button switch of pressing on overload protective device can reset, thereby reclose power supply, makes industrial vehicle re-start work, has improved the fail safe of industrial vehicle circuit and the convenience of maintenance.
Surface-mounted integrated circuit in overload protective device is its chip, for the switching of control circuit; Transistor switch is semiconductor element, and it has easy shutoff, needed auxiliary element is few, switch is rapid, the advantage such as can work under very high frequency.Described resistance is physical terminology, and circuit common element, for the voltage and current of stable and regulating circuit.
So the utlity model has following beneficial effect:
1, the utility model is simple in structure, cost is low, volume is little, easily install, reusable and without replacing;
2, when industrial vehicle circuit overloads, overload protective device of the present utility model carries out automatic shutdown circuit, keeps load, the fail safe that has improved industrial vehicle circuit;
3, after industrial vehicle fault is got rid of, directly by the push-button switch on overload protective device, it is resetted, thereby reclose power supply, make industrial vehicle re-start work, thereby increase work efficiency and reduce replacing, maintenance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the utility model circuit theory diagrams;
Fig. 2 is the utility model mounting circuit schematic diagram.
Embodiment
As shown in Figure 1, 2, described overload protective device 1 is arranged on the position of the close storage battery 2 on industrial vehicle by its housing, and its input is connected with storage battery 2, output is connected with load 3.Described overload protective device 1 comprises housing, is provided with surface-mounted integrated circuit IC1 in described housing, and surface-mounted integrated circuit IC1 connects with the 3rd resistance R 3, push-button switch AN, the first resistance R 1 successively; The output of described the 3rd resistance R 3 is connected with the second resistance R 2, transistor switch V respectively, and the output of described the second resistance R 2 is connected with the electronic switch of surface-mounted integrated circuit IC1, input and for the electronic switch of surface-mounted integrated circuit IC1 being carried out to the voltage-stabiliser tube V of pressure limiting
wconnect, make its voltage be no more than 6V; Described transistor switch V is connected with the 4th resistance R 4.
Further, the 1st pin of described surface-mounted integrated circuit IC1 is connected with storage battery 2 positive poles, the 2nd, 3 pin are connected with the 3rd resistance R 3, load 3 respectively, the 4th pin is connected with storage battery 2 negative poles, the 5th pin is connected with the second resistance R 2; The other end of described load 3 is connected with the 4th resistance R 4; Described voltage-stabiliser tube V
w, transistor switch V is all connected with storage battery 2 negative poles with the 4th resistance R 4.
When industrial vehicle circuit fault-free, press the button switch AN, the 6-24V supply voltage of storage battery 2 is given trigger voltage of the 5th pin of surface-mounted integrated circuit IC1 through the first resistance R 1 and the second resistance R 2, make its inner electronic switch closes, thereby connect circuit, makes load obtain electric work.Now surface-mounted integrated circuit IC1 output voltage feeds back to the second resistance R 2 through the 3rd resistance R 3, make the 5th pin control end of surface-mounted integrated circuit IC1 by short its self-insurance of feedback voltage, even if its internal electron switch is closed, and the 1st, 2, the 3 pin normal opens of surface-mounted integrated circuit IC1, load appliance is work as usual always.Voltage-stabiliser tube V
wbe for the voltage of restriction input the 5th pin, make it to be no more than setting 6V.
If there is overload or short trouble in load; pressure drop in the 4th resistance R 4 will increase; and when this pressure drop is greater than 0.4V, transistor switch V positively biased and conducting, its resistance is minimum; the collector emitter of transistor switch V is to ground short circuit; the 5th pin voltage to earth that makes surface-mounted integrated circuit IC1 is zero its inner electronic switch that disconnects, and circuit disconnects, load power-off; cut off the power supply of load appliance, reached the object of protection load appliance.After fault is got rid of, then press the button switch AN, overload protective device 1 is resetted, thereby make industrial vehicle re-start work after reclosing power supply, improved the fail safe of industrial vehicle circuit and the convenience of maintenance.
Overload protective device in the present embodiment is carried out to protective value test, it is passed into different electric currents, detect its protective value, its operating characteristics is as follows:
From upper table, can find out, when leading to rated current 80A, overload protective device not escape disconnects, and when electric current surpasses its rated current 80A, it carries out escape disconnection within the regular hour, and industrial vehicle circuit is protected; And rated current is larger, its escape disconnects faster, more timely to industrial vehicle circuit protection.
Above embodiment is not limited only to protection range of the present utility model, all based on basic thought of the present utility model, modify or change all belong to protection range of the present utility model.
Claims (3)
1. an industrial vehicle overload circuit protector, the input of described overload protective device is connected with storage battery, output is connected with load; It is characterized in that: described overload protective device comprises housing, in described housing, be provided with surface-mounted integrated circuit, described surface-mounted integrated circuit is connected with the 3rd resistance, push-button switch, the first resistance successively; The output of described the 3rd resistance is connected with the second resistance, transistor switch respectively, and the output of described the second resistance is connected with the electronic switch of described surface-mounted integrated circuit, and described transistor switch is connected with the 4th resistance.
2. a kind of industrial vehicle overload circuit protector according to claim 1, is characterized in that: the input of described the second resistance is connected with for the electronic switch of surface-mounted integrated circuit being carried out to the voltage-stabiliser tube of pressure limiting; The voltage of described voltage-stabiliser tube is for being not more than 6V.
3. a kind of industrial vehicle overload circuit protector according to claim 2, is characterized in that: the 1st pin of described surface-mounted integrated circuit is connected with battery positive voltage, the 2nd, 3 pin are connected with the 3rd resistance, load respectively, the 4th pin is connected with battery terminal negative, the 5th pin is connected with the second resistance; The other end of described load is connected with the 4th resistance; Described voltage-stabiliser tube, transistor switch are all connected with battery terminal negative with the 4th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420083229.1U CN203722203U (en) | 2014-02-26 | 2014-02-26 | Industrial-vehicle circuit overload protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420083229.1U CN203722203U (en) | 2014-02-26 | 2014-02-26 | Industrial-vehicle circuit overload protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203722203U true CN203722203U (en) | 2014-07-16 |
Family
ID=51161329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420083229.1U Expired - Lifetime CN203722203U (en) | 2014-02-26 | 2014-02-26 | Industrial-vehicle circuit overload protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203722203U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825243A (en) * | 2014-02-26 | 2014-05-28 | 安徽合力股份有限公司 | Circuit overload protector for industrial vehicle |
| CN113442847A (en) * | 2020-03-27 | 2021-09-28 | 比亚迪股份有限公司 | Fail-safe output circuit and vehicle-mounted controller |
-
2014
- 2014-02-26 CN CN201420083229.1U patent/CN203722203U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825243A (en) * | 2014-02-26 | 2014-05-28 | 安徽合力股份有限公司 | Circuit overload protector for industrial vehicle |
| CN103825243B (en) * | 2014-02-26 | 2017-02-15 | 安徽合力股份有限公司 | Circuit overload protector for industrial vehicle |
| CN113442847A (en) * | 2020-03-27 | 2021-09-28 | 比亚迪股份有限公司 | Fail-safe output circuit and vehicle-mounted controller |
| CN113442847B (en) * | 2020-03-27 | 2023-11-14 | 比亚迪股份有限公司 | Fail-safe output circuit and vehicle-mounted controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203787935U (en) | Over-current protection circuit based on high side current detection | |
| CN201846066U (en) | Undervoltage protective circuit with delaying function | |
| CN103779855A (en) | Novel surge protector | |
| CN103427392B (en) | A kind of electric system protection device | |
| CN103872658A (en) | Multifunctional self-recovery over-voltage and under-voltage protector | |
| CN203722203U (en) | Industrial-vehicle circuit overload protector | |
| CN102723694A (en) | Overvoltage and undervoltage protective device for power supply voltage | |
| CN207677425U (en) | Overcurrent, short-circuit protection | |
| CN206211522U (en) | A kind of PTC resistor suppresses the circuit of surge current | |
| CN107658857A (en) | A kind of switch power over-voltage protection circuit and method | |
| CN200976576Y (en) | Plane solid state relay for short circuit and overload protection | |
| CN201449437U (en) | Voltage-withstanding tester with high-voltage protective circuit | |
| CN204391717U (en) | A kind of Novel electric surge protector | |
| CN203434386U (en) | Safety socket with over current protection function | |
| CN207234697U (en) | A kind of wind turbine SS (soft start) control circuit | |
| CN103825243A (en) | Circuit overload protector for industrial vehicle | |
| CN204948040U (en) | A kind of metal-oxide-semiconductor current foldback circuit | |
| CN103996581A (en) | Breaker with overvoltage and undervoltage protection function and automatic reset function | |
| CN210837547U (en) | Mechanical switch circuit structure | |
| CN204290271U (en) | A kind of protection circuit of electric motorcar | |
| CN203086126U (en) | Novel surge protector | |
| CN203166457U (en) | Control circuit for realizing intelligent regulation | |
| CN207588436U (en) | A kind of reserve battery under-voltage protection and charge-discharge circuit | |
| CN204407861U (en) | A kind of Low-Voltage Leakage Protection | |
| CN203242858U (en) | Safe socket assembly with over-current protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
|
| CX01 | Expiry of patent term |