CN211082111U - Engine starting circuit and excavator - Google Patents
Engine starting circuit and excavator Download PDFInfo
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- CN211082111U CN211082111U CN201922363983.6U CN201922363983U CN211082111U CN 211082111 U CN211082111 U CN 211082111U CN 201922363983 U CN201922363983 U CN 201922363983U CN 211082111 U CN211082111 U CN 211082111U
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Abstract
The utility model provides an engine starting circuit and excavator relates to excavator technical field. The engine starting circuit comprises a power supply, a key starting switch and a starting relay, wherein the starting relay is connected with an engine to be started, and the engine starting circuit also comprises an emergency starting switch, and the emergency starting switch comprises a first state that a first connecting end is connected with a second connecting end and a second state that the first connecting end is connected with a third connecting end; the first connecting end is connected with the key starting switch, and the second connecting end is connected with the starting relay; the starting relay comprises a control output end and two control input ends, the control output end is connected with the engine, the starting relay comprises a third state that the first control input end is connected with the control output end, and a fourth state that the second control input end is connected with the control output end. The utility model discloses a problem that controller EPOS broke down and other engines can't normally start has been solved to scheme engine starting circuit.
Description
Technical Field
The utility model relates to an excavator technical field, in particular to engine starting circuit and excavator.
Background
In the prior art, a driver needs to rotate a key starting switch to a starting position when an engine of an excavator is normally started, a starting relay connected with the key starting switch and a controller EPOS are electrified, the controller EPOS sends a grounding signal, the starting relay is grounded and makes a connection action, and the engine connected with the starting relay is started. When the EPOS of the controller fails, the starting relay cannot be connected, the engine cannot be started, and the state that the current position of the excavator is not suitable for overhauling can occur. An emergency starting design is urgently needed, when the EPOS of the controller breaks down and other engines cannot be started normally, a circuit of a starting relay and the engines can be communicated and started, the excavator is moved, and the excavator is driven to a safe and convenient place to be overhauled.
SUMMERY OF THE UTILITY MODEL
The utility model provides an engine starting circuit and excavator for solve the problem that controller EPOS breaks down and other engines can't normally start.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:
an engine starting circuit comprising a power source, a key start switch and a start relay, wherein the start relay is connected to an engine to be started, the engine starting circuit further comprising:
the emergency starting switch comprises three connecting ends, and the emergency starting switch comprises a first state that a first connecting end is connected with a second connecting end and a second state that the first connecting end is connected with a third connecting end; the first connecting end is connected with the key starting switch, and the second connecting end is connected with the starting relay;
the starting relay comprises a control output end and two control input ends, the control output end is connected with the engine, and the starting relay comprises a third state that the first control input end is connected with the control output end and a fourth state that the second control input end is connected with the control output end;
the second control input end is connected with the key starting switch, and the starting relay is in the third state when the emergency starting switch is in the first state; when the emergency starting switch is in the second state, the starting relay is in the fourth state.
Optionally, the second state is a state when the emergency starting switch is not pressed, and the first state is a state when the emergency starting switch is pressed.
Optionally, the key start switch includes an input terminal and three output connection terminals, the input terminal is connected to the power supply; a first output connecting end of the three output connecting ends is connected with a first connecting end of the emergency starting switch, and a second output connecting end of the three output connecting ends is connected with a second control input end of the starting relay; the key start switch includes: the switch comprises an input end, three output connecting ends, a switch disconnection state and a switch closing state, wherein the input end is connected with a third output connecting end of the three output connecting ends, the input end is connected with the second output connecting end, and the input end is simultaneously connected with the first output connecting end and the second output connecting end.
Optionally, the engine start circuit further comprises: a master switch;
wherein the input end of the key start switch is connected with the power supply through the master control switch.
Optionally, the engine start circuit further comprises:
the controller EPOS comprises a signal trigger end and a signal output end; the signal trigger end is connected with the first output connecting end;
the electronic control unit ECU is respectively connected with the signal output end of the EPOS and the starting relay;
the ECU receives the trigger signal output by the signal output end and supplies power to the starting relay, and the starting relay is switched from the third state to the fourth state.
Optionally, the start relay further includes a state that is switched from the fourth state to the third state when the power supply of the ECU is cancelled.
The embodiment of the utility model also provides an excavator, a serial communication port, include as above engine starting circuit.
The utility model has the advantages that:
in the scheme, the emergency starting switch is additionally arranged on the starting circuit of the engine, the starting relay is replaced, the EPOS and the electric circuit in the EPOS solve the problem that the EPOS fails and the engine cannot be normally started, the engine circuit can be started through the emergency starting switch, the excavator is moved, and the excavator runs to a safe and convenient place to overhaul.
Drawings
Fig. 1 shows a circuit diagram of an engine starting circuit according to an embodiment of the present invention;
FIG. 2 shows a connection state diagram of a key actuated switch in accordance with an embodiment of the present invention;
fig. 3 is an equivalent circuit diagram showing normal start of the engine starting circuit according to the embodiment of the present invention;
fig. 4 is an equivalent circuit diagram showing an emergency start of the engine starting circuit according to the embodiment of the present invention.
Description of reference numerals:
1-a power supply; 2-a master control switch; 3-key start switch; 31-a first output connection; 32-a second output connection; 33-a third output connection; 34-an input terminal; 4-an engine; 5-starting a relay; 51-a first control input; 52-second control input; 53-control output; 6-emergency starting switch; 61-a first connection end; 62-a second connection end; 63-a third connection end; 7-controller EPOS; 71-signal trigger end; 72-signal output; 8-electronic control unit ECU.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses the problem to the unable normal start of controller EPOS trouble and other engines of excavator among the prior art provides an engine starting circuit and excavator, satisfies the urgent start-up of engine, the demand of interim moving vehicle.
As shown in fig. 1, an embodiment of the present invention provides an engine starting circuit, including:
the emergency starting switch 6 comprises three connecting ends, and the emergency starting switch 6 comprises a first state that a first connecting end 61 is connected with a second connecting end 62 and a second state that the first connecting end 61 is connected with a third connecting end 63; the first connection end 61 is connected with the key starting switch 3, and the second connection end 62 is connected with the starting relay 5;
wherein the starter relay 5 comprises a control output 53 and two control inputs, the control output 53 is connected to the engine 4, the starter relay 5 comprises a third state in which the first control input 51 is connected to the control output 53, and a fourth state in which the second control input 52 is connected to the control output 53;
the second control input 52 is connected to the key start switch 3, and when the emergency start switch 6 is in the first state, the start relay 5 is in the third state; when the emergency starting switch 6 is in the second state, the starting relay 5 is in the fourth state.
Here, the second state is a state when the emergency start switch 6 is not pressed, and the first state is a state when the emergency start switch 6 is pressed.
It should be noted that, in the normal starting state, the emergency starting switch 6 is in the second state, and the starting relay 5 is in the fourth state; under emergency starting, the emergency starting switch 6 is in a first state, and the starting relay 5 is in a third state.
Here, as shown in fig. 2, the key start switch 3 includes an input terminal 34 and three output connection terminals, the input terminal 34 being connected to the power source 1; a first output connection 31 of the three output connections is connected to a first connection 61 of the emergency starting switch 6, and a second output connection 32 is connected to a second control input 52 of the starting relay 5; the key start switch 3 includes: a switch-off state in which the input terminal 34 is connected to a third output connection terminal 33 of the three output connection terminals, a switch-on state in which the input terminal 34 is connected to the second output connection terminal 32, and a start-up state in which the input terminal 34 is simultaneously connected to the first output connection terminal 31 and the second output connection terminal 32.
Here, the engine start circuit further includes: a master switch 2;
wherein the input end 34 of the key start switch 3 is connected with the power supply 1 through the main control switch 2.
Here, the engine start circuit further includes:
a controller EPOS7 including a signal trigger terminal 71 and a signal output terminal 72; the signal trigger end 71 is connected to the first output connection end 31;
an electronic control unit ECU8 connected to the signal output terminal 72 of the EPOS7 and the starter relay 5, respectively;
the ECU8 receives the trigger signal output by the signal output terminal 72, and supplies power to the starter relay 5, and the starter relay 5 is switched from the third state to the fourth state.
Here, the starter relay 5 further includes a state that is switched from the fourth state to the third state when the power supply to the ECU8 is cancelled.
The utility model discloses an in this embodiment, under the normal starting condition, as shown in fig. 3, when key starting switch 3 is in the starting condition, first output connection 31 and second output connection 32 are electrified, the second control input 52 of starting relay 5 gets electric, the first control input 51 of starting relay 5 gets electric, controller EPOS 7's signal trigger end 71 obtains the signal, controller EPOS 7's signal output part 72 exports trigger signal to electronic control unit ECU8 simultaneously, electronic control unit ECU8 receives behind the trigger signal, supply power for starting relay 5, starting relay 5 moves, second control input 52 and output 53 switch-on, engine 4 gets electric, engine 4 starts.
In an emergency starting state, as shown in fig. 4, the excavator cannot be normally started due to a problem, a first connecting end 61 and a second connecting end 62 of an emergency starting switch 6 are connected, a starting relay 5 is controlled by an EPOS7 and an electronic control unit ECU8, a first control input end 51 and a control output end 53 of the starting relay 5 are always connected, at this time, when a key starting switch 3 is not in a starting state, an engine 4 does not act, when the key starting switch 3 is in the starting state, the first connecting end 61 of the emergency starting switch 6 is powered on, the engine 4 is started, works in an idling state, and the excavator can be temporarily moved to a safe and convenient place for inspection and maintenance.
The embodiment of the utility model provides an excavator still provides, include as above engine starting circuit.
The embodiment of the utility model provides an adopt as above engine starting circuit's excavator, when running into controller EPOS7, electric circuit and other engines 4 unable normal start problem, can start through emergency starting switch 6, remove the vehicle, go the excavator temporarily to safe convenient place and overhaul.
The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
Claims (7)
1. An engine starting circuit comprising a power source (1), a key start switch (3) and a start relay (5), wherein the start relay (5) is connected to an engine (4) to be started, characterized in that it further comprises:
the emergency starting switch (6) comprises three connecting ends, and the emergency starting switch (6) comprises a first state that a first connecting end (61) is connected with a second connecting end (62) and a second state that the first connecting end (61) is connected with a third connecting end (63); the first connecting end (61) is connected with the key starting switch (3), and the second connecting end (62) is connected with the starting relay (5);
wherein the start relay (5) comprises a control output (53) and two control inputs, the control output (53) being connected to the engine (4), the start relay (5) comprising a third state in which a first control input (51) is connected to the control output (53), and a fourth state in which a second control input (52) is connected to the control output (53);
the second control input (52) is connected with the key start switch (3), and when the emergency start switch (6) is in the first state, the start relay (5) is in the third state; when the emergency starting switch (6) is in the second state, the starting relay (5) is in the fourth state.
2. An engine start circuit according to claim 1, characterized in that the second state is a state when the emergency start switch (6) is not pressed, and the first state is a state when the emergency start switch (6) is pressed.
3. An engine starting circuit according to claim 1, characterized in that said key start switch (3) comprises an input (34) and three output connections, said input (34) being connected to said power source (1); a first output connection (31) of the three output connections is connected with a first connection (61) of the emergency starting switch (6), and a second output connection (32) is connected with a second control input (52) of the starting relay (5); the key start switch (3) comprises: the switch comprises a switch-off state in which the input end (34) is connected with a third output connection end (33) of the three output connection ends, a switch-on state in which the input end (34) is connected with the second output connection end (32), and a starting state in which the input end (34) is simultaneously connected with the first output connection end (31) and the second output connection end (32).
4. The engine start circuit of claim 3, further comprising: a master switch (2);
wherein the input end (34) of the key start switch (3) is connected with the power supply (1) through the main control switch (2).
5. The engine start circuit of claim 3, further comprising:
a controller EPOS (7) comprising a signal trigger terminal (71) and a signal output terminal (72); the signal trigger end (71) is connected with the first output connection end (31);
the electronic control unit ECU (8) is respectively connected with a signal output end (72) of the EPOS (7) and the starting relay (5);
the ECU (8) receives the trigger signal output by the signal output end (72), supplies power to the starting relay (5), and the starting relay (5) is switched from the third state to the fourth state.
6. The engine starting circuit according to claim 5, characterized in that the starter relay (5) further comprises a state that switches from the fourth state to the third state when the power supply to the ECU (8) is removed.
7. An excavator comprising an engine starting circuit as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922363983.6U CN211082111U (en) | 2019-12-25 | 2019-12-25 | Engine starting circuit and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922363983.6U CN211082111U (en) | 2019-12-25 | 2019-12-25 | Engine starting circuit and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211082111U true CN211082111U (en) | 2020-07-24 |
Family
ID=71646273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922363983.6U Active CN211082111U (en) | 2019-12-25 | 2019-12-25 | Engine starting circuit and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211082111U (en) |
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2019
- 2019-12-25 CN CN201922363983.6U patent/CN211082111U/en active Active
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