CN202125353U - Overhauling protection circuit for engine - Google Patents
Overhauling protection circuit for engine Download PDFInfo
- Publication number
- CN202125353U CN202125353U CN2011201592376U CN201120159237U CN202125353U CN 202125353 U CN202125353 U CN 202125353U CN 2011201592376 U CN2011201592376 U CN 2011201592376U CN 201120159237 U CN201120159237 U CN 201120159237U CN 202125353 U CN202125353 U CN 202125353U
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- Prior art keywords
- starting
- relay
- switching relay
- links
- engine
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Abstract
The utility model discloses an overhauling protection circuit for an engine, which can realize automatic switching of front and back starting states of the engine without artificial arrangement. The overhauling protection circuit for the engine comprises a front starting button, a rear starting button, a starting relay, a starting motor, a switching relay and a stroke switch, wherein the starting trigger end of the starting motor is connected with the positive electrode of a power supply by a normally open contact set of the starting relay, a control end of the switching relay is connected with the positive electrode of the power supply, the grounding end of the starting relay and the grounding end of the starting motor are respectively connected with the negative electrode of the power supply, a shifting contact of the switching relay is connected with the control end of the switching relay, the normally open contact of the switching relay is connected with the positive electrode of the power supply by the rear starting button, the normally closed contact of the switching relay is connected with the positive electrode of the power supply by the front starting button, and the grounding end of the switching relay is connected with the negative electrode of the power supply by the stroke switch. In the utility model, the engine can be in normal starting state by arranging the stroke switch used for detecting the opening and closing of an engine cabin door.
Description
Technical field
The utility model relates to the motor of automobile, refers more particularly to the maintenance protective circuit of motor.
Background technique
Mostly modern bus is rear engine vehicle, for ease of the maintenance to rear engine, all is provided with the back in the engine compartment and starts blanket, is convenient to the maintenance man and when motor has fault, overhauls use.Start diverter switch before and after all being provided with on the general apparatus for examination and repair, starting state after when the maintenance man is overhauling motor, need diverter switch being switched to, operator cabin personnel misoperation enable switch before preventing causes the unexpected injury to the maintenance man.The apparatus for examination and repair that has even be provided with key formula rotary switch can better have been protected maintenance safety as key is just pulled out.But sometimes the maintainer forgets that switch is switched setting perhaps to be pulled out key, if misoperation at this moment just might damage the person owing to be busy with maintenance.
The model utility content
The utility model technical problem to be solved is: a kind of artificial maintenance protective circuit that the motor of the automatic conversion that just can realize motor front and back starting state is set that do not need is provided.
In order to solve the problems of the technologies described above; The technological scheme that the utility model adopted is: the maintenance protective circuit of motor; Comprise: forward and backward startup knob, starting relay, starting motor, switching relay and the position limit switch that is used for the keying of detection of engine hatch door; The startup trigger end of starting motor links to each other with positive source through the normally opened contact group of starting relay, and the control end of switching relay links to each other with positive source, and starting relay all links to each other with power cathode with starting motor grounding end separately; The contact of stirring of switching relay links to each other with the control end of starting relay; The normally opened contact of switching relay links to each other with positive source through the back start button, and the normally-closed contact of switching relay links to each other with positive source through preceding start button, and the grounding end of switching relay links to each other with power cathode through position limit switch.
Described maintenance protective circuit also includes: the gearbox neutral position switch, the contact of stirring of said switching relay links to each other with the control end of starting relay through the gearbox neutral position switch.
Described position limit switch is contactless position limit switch.
The beneficial effect of the utility model is: the utility model is through being provided for the position limit switch that the detection of engine hatch door opens and closes; Make when opening engine compartment door; Position limit switch is closed, and switching relay gets electric, and the normally-closed contact of switching relay breaks off; Normally opened contact is closed; Become the back and start thereby the starting state of motor started in the past, realized the automatic switchover of starting state, prevented effectively switch to be switched misoperation possibly damage the person under the situation that is provided with or key is pulled out forgetting.In addition, the gearbox neutral position switch has been sealed in the control loop of starting relay, guaranteed that motor is in the neutral state, made that maintenance is safer.In addition, the employing of contactless position limit switch has prolonged working life of position limit switch greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1, back start button, 2, preceding start button, 3, the gearbox neutral position switch, 4, switching relay, 5, starting relay, 6, position limit switch, 7, starting motor.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiments of the utility model in detail.
As shown in Figure 1; The maintenance protective circuit of the said motor of the utility model; Comprise: preceding startup knob 2, back start button 1, starting relay 5, starting motor 7 and switching relay 4, gearbox neutral position switch 3 and be used for the position limit switch 6 that the detection of engine hatch door opens and closes; The startup trigger end of starting motor 7 links to each other with positive source through the normally opened contact group of starting relay 5; The control end of switching relay 4 links to each other with positive source; Starting relay 5 all links to each other with power cathode with starting motor 7 grounding end separately, and the contact of stirring of switching relay 4 links to each other with the control end of starting relay 5 through gearbox neutral position switch 3, and the normally opened contact of switching relay 4 links to each other with positive source through back start button 1; The normally-closed contact of switching relay 4 links to each other with positive source through preceding start button 2, and the grounding end of switching relay 4 links to each other with power cathode through position limit switch 6.Described position limit switch 6 is contactless position limit switch, and what select for use in the present embodiment is the photoelectricity non-contact switch, and its model is PK8-2C.
The working procedure of the utility model is: at first, when gearbox must be in the neutral state, gearbox neutral position switch 3 closures, starting relay 5 gets the electrician and does, just can ato unit.When engine compartment door was closed, position limit switch 6 broke off, switching relay 4 dead electricity, the normally-closed contact of switching relay 4 with stir make contact, at this moment, can be through start button 2 normal ato units before pressing; And open after the engine compartment door, position limit switch 6 closures, switching relay 4; The normally opened contact of switching relay 4 with stir make contact; The preceding loop that starts is cut off, and at this moment, just can overhaul motor; In maintenance process, can be through pressing back start button 1 ato unit.
Claims (3)
1. the maintenance protective circuit of motor; Comprise: forward and backward startup knob (2,1), starting relay (5), starting motor (7) and switching relay (4); The startup trigger end of starting motor (7) links to each other with positive source through the normally opened contact group of starting relay (5); The control end of switching relay (4) links to each other with positive source; Starting relay (5) all links to each other with power cathode with starting motor (7) grounding end separately; It is characterized in that: this maintenance protective circuit also includes and is used for the position limit switch (6) that the detection of engine hatch door opens and closes, and the contact of stirring of said switching relay (4) links to each other with the control end of starting relay (5), and the normally opened contact of switching relay (4) links to each other with positive source through back start button (1); The normally-closed contact of switching relay (4) links to each other with positive source through preceding start button (2), and the grounding end of switching relay (4) links to each other with power cathode through position limit switch (6).
2. maintenance protective circuit according to claim 1 is characterized in that: also include gearbox neutral position switch (3), the contact of stirring of said switching relay (4) links to each other with the control end of starting relay (5) through gearbox neutral position switch (3).
3. maintenance protective circuit according to claim 1 and 2 is characterized in that: described position limit switch (6) is contactless position limit switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201592376U CN202125353U (en) | 2011-05-18 | 2011-05-18 | Overhauling protection circuit for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201592376U CN202125353U (en) | 2011-05-18 | 2011-05-18 | Overhauling protection circuit for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125353U true CN202125353U (en) | 2012-01-25 |
Family
ID=45488423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201592376U Expired - Lifetime CN202125353U (en) | 2011-05-18 | 2011-05-18 | Overhauling protection circuit for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125353U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213140A (en) * | 2011-05-18 | 2011-10-12 | 江苏友谊汽车有限公司 | Repairing protection circuit of engine |
| CN104265537A (en) * | 2014-08-15 | 2015-01-07 | 南车戚墅堰机车有限公司 | Starting control circuit of diesel engine of internal combustion locomotive |
-
2011
- 2011-05-18 CN CN2011201592376U patent/CN202125353U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213140A (en) * | 2011-05-18 | 2011-10-12 | 江苏友谊汽车有限公司 | Repairing protection circuit of engine |
| CN102213140B (en) * | 2011-05-18 | 2012-10-03 | 江苏友谊汽车有限公司 | Repairing protection circuit of engine |
| CN104265537A (en) * | 2014-08-15 | 2015-01-07 | 南车戚墅堰机车有限公司 | Starting control circuit of diesel engine of internal combustion locomotive |
| CN104265537B (en) * | 2014-08-15 | 2016-03-23 | 南车戚墅堰机车有限公司 | Diesel engine of diesel locomotive start control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120125 Effective date of abandoning: 20121003 |