CN204677745U - The automatic control circuit out of supply of gearbox - Google Patents
The automatic control circuit out of supply of gearbox Download PDFInfo
- Publication number
- CN204677745U CN204677745U CN201520331622.2U CN201520331622U CN204677745U CN 204677745 U CN204677745 U CN 204677745U CN 201520331622 U CN201520331622 U CN 201520331622U CN 204677745 U CN204677745 U CN 204677745U
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- supply
- switch
- gearbox
- switch out
- brake
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Abstract
The utility model provides a kind of gearbox automatic control circuit out of supply, comprise storage battery, driving switch, gearbox control valve, the first switch out of supply, the second switch out of supply, the 3rd switch out of supply, normally opened relay and normally closed relay, described first switch out of supply, the second switch out of supply and the 3rd switch out of supply are the arbitrary arrangement combination of brake petal switch out of supply, pressure switch and park brake switch, and described pressure switch is for detecting brake system pressure value.The utility model is coordinated with vehicle operation device or hydraulic system by park brake switch, brake petal switch out of supply or pressure switch, the change of machinery action or hydraulic system pressure is made to be converted into the signal of electrical control needs, like this at operation locking device for a vehicle, when depressing brake petal and brake system pressure lower than design load, by the change of the contacts status of switch coordinated with them, control the break-make of gearbox solenoid valve electric control loop, realize the automatic control out of supply of gearbox.
Description
Technical field
The utility model relates to the electric liquid commutation automatic control technique field out of supply of gearbox, is specifically related to the control circuit automatic out of supply for electric liquid commutation gearbox.
Background technique
Heavy forklift part vehicle makes electricity consumption liquid commutation gearbox, and electric liquid commutation gearbox is with the break-make in gear clutch hydraulic pressure loop in electromagnetic valve gearbox, thus realizes gearbox-gear engagement.Electricity liquid commutation gearbox control mode has a great impact for the safe handling of vehicle and gearbox quality.In existing gearbox electric control system, gearbox Controlling solenoid valve is by being arranged on park brake switch (switch contact the is normally closed) ground connection on park brake operation device.Pull-up locking device for a vehicle, vehicle can realize parking braking, now due to the effect of locking device for a vehicle mechanical structure, park brake switch contact becomes disconnection from closed, without the need to by gear shifting handle involution meta, also can cut off gearbox Controlling solenoid valve loop, realize automatically out of supply.But in actual use, except parking braking, what vehicle operator frequency of utilization was higher also has left foot brake petal, depresses Vehicular left pedal, and vehicle realizes braking.But in existing gearbox electric control system, this kind of situation does not arrange control out of supply, and now gearbox still has Power output, therefore easily causes speed change box clutch ablation, has a strong impact on gearbox service property (quality).Also has a kind of situation, in existing gearbox electric control system, automatic control out of supply is not set, namely braking system faults is worked as, when there is system pressure lower than design load, now gearbox keeps outputting power, but braking effect does not reach designing requirement, causes vehicle cannot effective brake, easily cause production accident, affect vehicle operating security requirement.
Model utility content
The utility model provides a kind of gearbox automatic control circuit out of supply, to realize the function automatic out of supply of gearbox in forklift operator process.
For solving the problems of the technologies described above, the utility model adopts following technological scheme:
The automatic control circuit out of supply of a kind of gearbox, comprise storage battery, driving switch, gearbox control valve, the first switch out of supply, the second switch out of supply, the 3rd switch out of supply, normally opened relay and normally closed relay, described first switch out of supply, the second switch out of supply and the 3rd switch out of supply are the arbitrary arrangement combination of brake petal switch out of supply, pressure switch and park brake switch, and described pressure switch is for detecting brake system pressure value;
The positive pole of described storage battery is connected with the input end of the coil of driving switch, normally opened relay and the coil of normally closed relay respectively;
The output terminal of described driving switch is connected with the input end of gearbox control valve, the output terminal of gearbox control valve is connected with the normally opened contact input end of normally opened relay, the normally opened contact output terminal of normally opened relay is connected with the input end of the first switch out of supply, the output head grounding of the first switch out of supply;
The coil output of described normally opened relay is connected with the input end of the second switch out of supply, and the output terminal of the second switch out of supply is connected with the normally-closed contact input end of normally closed relay, the normally-closed contact output head grounding of normally closed relay;
The coil output of described normally closed relay is connected with the input end of the 3rd switch out of supply, the output head grounding of the 3rd switch out of supply.
Preferably, described first switch out of supply, the second switch out of supply and the 3rd switch out of supply are respectively park brake switch, brake petal switch out of supply and pressure switch.
From above technological scheme, the utility model is coordinated with vehicle operation device or hydraulic system by park brake switch, brake petal switch out of supply or pressure switch, the change of machinery action or hydraulic system pressure is made to be converted into the signal of electrical control needs, like this at operation locking device for a vehicle, when depressing brake petal and brake system pressure lower than design load, by the change of the contacts status of switch coordinated with them, control the break-make of gearbox solenoid valve electric control loop, realize the automatic control out of supply of gearbox; The infringement that may cause gearbox when carrying out vehicle operating is eliminated or is transferred to cost little, change easily and complete vehicle quality affected on little device, reach protection gearbox, reduce maintenance cost and improve the object of vehicle operating Security.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model at the non-starting state of motor;
Fig. 2 is the structural representation of the utility model in engine start state;
Fig. 3 is in the utility model preferred embodiment, in brake system pressure lower than structural representation during default value;
Fig. 4 is in the utility model preferred embodiment, the structural representation when depressing brake petal;
Fig. 5 is in the utility model preferred embodiment, the structural representation when pull-up locking device for a vehicle.
In figure: 1, storage battery, 2, driving switch, 3, gearbox control valve, the 4, first switch out of supply, the 5, second switch out of supply, the 6, the 3rd switch out of supply, 7, normally opened relay, 8, normally closed relay.
Embodiment
Below in conjunction with accompanying drawing, a kind of preferred implementation of the present utility model is described in detail.
As shown in Figure 1, the automatic control circuit out of supply of described gearbox comprises storage battery 1, driving switch 2, gearbox control valve the 3, first switch 4, second out of supply switch 5 out of supply, the 3rd switch 6 out of supply, normally opened relay 7 and normally closed relay 8.Described first switch out of supply, the second switch out of supply and the 3rd switch out of supply are the arbitrary arrangement combination of brake petal switch out of supply, pressure switch and park brake switch, wherein any number of combination all can reach the function of automatic control out of supply, and described pressure switch is for detecting brake system pressure value.When motor does not start, inoperation locking device for a vehicle, inoperation brake petal and brake system pressure normal time, described park brake switch, brake petal switch out of supply and driving switch are in closed state, and described driving switch is in off state.
The positive pole of described storage battery 1 is connected with the input end of the coil of driving switch 2, normally opened relay 7 and the coil of normally closed relay 8 respectively, the minus earth of storage battery.
The output terminal of described driving switch 2 is connected with the input end of gearbox control valve 3, the output terminal of gearbox control valve 3 is connected with the normally opened contact input end of normally opened relay 7, the normally opened contact output terminal of normally opened relay 7 is connected with the input end of the first switch 4 out of supply, the output head grounding of the first switch 4 out of supply.
The coil output of described normally opened relay 7 is connected with the input end of the second switch 5 out of supply, and the output terminal of the second switch 5 out of supply is connected with the normally-closed contact input end of normally closed relay 8, the normally-closed contact output head grounding of normally closed relay 8.
The coil output of described normally closed relay 8 is connected with the input end of the 3rd switch 6 out of supply, the output head grounding of the 3rd switch 6 out of supply.
Because parking braking is out of supply and pedal brake use out of supply is comparatively frequent, in order to improve operational stability, preferably, described first switch 4, second out of supply switch 5 out of supply and the 3rd switch 6 out of supply are respectively park brake switch, brake petal switch out of supply and pressure switch, for convenience of description, described park brake switch, brake petal switch out of supply and pressure switch adopt 4,5 and 6 to represent respectively equally.
Fig. 2 shows situation during engine start, ato unit, and brake system pressure is set up, closed driving switch 2, because brake system pressure is set up, under the effect of brake system pressure, pressure switch 6 becomes disconnection from closed, and the normally-closed contact of normally closed relay 8 remains closed.If now do not depress brake petal, brake petal switch out of supply is kept closed, and the coil of normally opened relay 7 obtains electric, and the normally opened contact of normally opened relay 7 closes.Inoperation locking device for a vehicle, park brake switch 4 remains closed, and gearbox control valve 3 obtains electric, and gearbox works at selected gear.
Fig. 3 shows brake system pressure lower than situation during default value, keeps driving switch 2 to close, inoperation brake petal and locking device for a vehicle.When brake system pressure is lower than default value, pressure switch 6 closes, and the coil of normally closed relay 8 obtains electric, and the normally-closed contact of normally closed relay 8 disconnects.The coil losing electricity of normally opened relay 7, the normally opened contact of normally opened relay 7 becomes disconnection from closed, and gearbox control valve 3 dead electricity, gearbox realizes out of supply.
Fig. 4 shows situation when depressing brake petal, and keep driving switch 2 to close, brake system pressure is normal, inoperation locking device for a vehicle.Depress brake petal, brake petal switch 5 out of supply becomes disconnection, the coil losing electricity of normally opened relay 7 from closed, and the normally opened contact of normally opened relay 7 becomes disconnection from closed, and gearbox control valve 3 dead electricity, gearbox realizes out of supply.
Fig. 5 shows situation during pull-up locking device for a vehicle, and keep driving switch 2 to close, brake system pressure is normal, inoperation brake petal.Pull-up locking device for a vehicle, realizes parking braking, and make park brake switch 4 become disconnection from closed, gearbox control valve 3 dead electricity, gearbox realizes out of supply.
The above mode of execution is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that claims of the present utility model determine.
Claims (2)
1. the automatic control circuit out of supply of gearbox, it is characterized in that, comprise storage battery (1), driving switch (2), gearbox control valve (3), the first switch out of supply (4), the second switch out of supply (5), the 3rd switch out of supply (6), normally opened relay (7) and normally closed relay (8), described first switch out of supply, the second switch out of supply and the 3rd switch out of supply are the arbitrary arrangement combination of brake petal switch out of supply, pressure switch and park brake switch, and wherein pressure switch is for detecting brake system pressure value;
The positive pole of described storage battery (1) is connected with the input end of the coil of driving switch (2), normally opened relay (7) and the coil of normally closed relay (8) respectively;
The output terminal of described driving switch (2) is connected with the input end of gearbox control valve (3), the output terminal of gearbox control valve (3) is connected with the normally opened contact input end of normally opened relay (7), the normally opened contact output terminal of normally opened relay (7) is connected with the input end of the first switch out of supply (4), the output head grounding of the first switch out of supply;
The coil output of described normally opened relay (7) is connected with the input end of the second switch out of supply (5), the output terminal of the second switch out of supply (5) is connected with the normally-closed contact input end of normally closed relay (8), the normally-closed contact output head grounding of normally closed relay (8);
The coil output of described normally closed relay (8) is connected with the input end of the 3rd switch out of supply (6), the output head grounding of the 3rd switch out of supply (6).
2. the automatic control circuit out of supply of gearbox according to claim 1, it is characterized in that, described first switch out of supply (4), the second switch out of supply (5) and the 3rd switch out of supply (6) are respectively park brake switch, brake petal switch out of supply and pressure switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520331622.2U CN204677745U (en) | 2015-05-21 | 2015-05-21 | The automatic control circuit out of supply of gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520331622.2U CN204677745U (en) | 2015-05-21 | 2015-05-21 | The automatic control circuit out of supply of gearbox |
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| Publication Number | Publication Date |
|---|---|
| CN204677745U true CN204677745U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520331622.2U Active CN204677745U (en) | 2015-05-21 | 2015-05-21 | The automatic control circuit out of supply of gearbox |
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| Country | Link |
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| CN (1) | CN204677745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869477A (en) * | 2019-03-28 | 2019-06-11 | 徐州徐工施维英机械有限公司 | A kind of gearbox gear-shift protection system and engineering machinery |
-
2015
- 2015-05-21 CN CN201520331622.2U patent/CN204677745U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869477A (en) * | 2019-03-28 | 2019-06-11 | 徐州徐工施维英机械有限公司 | A kind of gearbox gear-shift protection system and engineering machinery |
| CN109869477B (en) * | 2019-03-28 | 2024-01-26 | 徐州徐工施维英机械有限公司 | Gear box gear shift protection system and engineering machinery |
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| GR01 | Patent grant |