CN202039953U - Power take-off safety protection device of tractor - Google Patents
Power take-off safety protection device of tractor Download PDFInfo
- Publication number
- CN202039953U CN202039953U CN2011200910901U CN201120091090U CN202039953U CN 202039953 U CN202039953 U CN 202039953U CN 2011200910901 U CN2011200910901 U CN 2011200910901U CN 201120091090 U CN201120091090 U CN 201120091090U CN 202039953 U CN202039953 U CN 202039953U
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- power take
- output terminal
- input end
- valve
- contact
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Abstract
The utility model relates to the field of electric, in particular to a power take-off safety protection device of a tractor, which comprises a left relay, a right relay, a power take-off switch and a power take-off electromagnetic valve. Compared with the prior art, the power take-off safety protection device of the tractor has the advantages that electric control and coil type relays are adopted, so the structure is simple and reliable, the cost of a control unit is very low, and the power take-off safety protection device is suitable for being popularized in the agricultural machinery industry.
Description
Technical field
The utility model relates to electric field, specifically a kind of power output safety protective gear of tractor.
Background technique
Big-powered tractor owing to after burst accident stops operation, may start before disconnecting the pto rotary power source when farming operation once more, thus the accident that causes tractor to hurt sb.'s feelings.Therefore, a kind of electric protective device of needs stops operation afterwards, starts once more before the deenergization because of burst accident in order to avoid tractor.But, this device not also at present in the industry.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of safety protection device that can protect the power output of tractor is provided.
In order to achieve the above object, the utility model comprises left relay, right relay, power take-off valve and power output solenoid valve, it is characterized in that: an end of power take-off valve A contact respectively with an end of power take-off valve B contact, the input end of wire harness connector assembly connects, the other end of power take-off valve A contact is connected with the input end of wire harness connector assembly, the other end of power take-off valve B contact is connected with the input end of wire harness connector assembly, the output terminal of wire harness connector assembly is connected with the input end of left relay coil, the output terminal of wire harness connector assembly respectively with the input end of right relay coil, the output terminal of right relay normally open contact, the input end of left side relay normally open contact connects, the output terminal of wire harness connector assembly respectively with the 12V power supply, the input end of right relay normally open contact connects, the output terminal of left side relay coil and the output terminal of right relay coil be ground connection respectively, and the output terminal of left relay normally open contact is exported solenoid valve with power respectively, instrument connects.
The utility model compared with prior art adopts electrical control, coil type relay, thereby makes simple in structurely, reliable, and the control unit cost is extremely low, is adapted at agricultural machinery industry and promotes.
Description of drawings
Fig. 1 is electric control theory figure of the present utility model.
Embodiment
Now in conjunction with the accompanying drawings the utility model is described further.
Referring to Fig. 1, the utility model comprises left relay, right relay, power take-off valve and power output solenoid valve.One end of power take-off valve A contact respectively with an end of power take-off valve B contact, the input end R of wire harness connector assembly connects, the other end of power take-off valve A contact is connected with the input end V of wire harness connector assembly, the other end of power take-off valve B contact is connected with the input end ZN of wire harness connector assembly, the output terminal V of wire harness connector assembly is connected with the input end V85 of left relay coil, the output terminal ZN of wire harness connector assembly respectively with the input end ZN85 of right relay coil, the output terminal ZN87 of right relay normally open contact, the input end ZN30 of left side relay normally open contact connects, the output terminal R of wire harness connector assembly respectively with the 12V power supply, the input end BR30 of right relay normally open contact connects, the output terminal 86 of left side relay coil and the output terminal of right relay coil 86 difference ground connection, the output terminal VG87 of left relay normally open contact exports solenoid valve with power respectively, instrument connects.
When the 12V power cut-off, power take-off valve B contact dead electricity, the coil losing electricity of left relay and right relay, the normally opened contact dead electricity of left relay and right relay disconnects, power output solenoid valve, instrument dead electricity, pto stops the rotation.
After outage, when the 12V power supply is switched on once more, the contact R of power take-off valve gets, but because the B contact disconnects, right relay coil dead electricity, right relay normally open contact dead electricity disconnects, the 12V power supply can't be transferred to the output terminal ZN 87 of right relay by the input end BR30 of right relay, therefore, the input end ZN30 of the left relay normally open contact that is connected with the output terminal ZN 87 of the normally opened contact of right relay does not have power supply, thereby the power that causes being connected with the output terminal VG87 of left relay normally open contact is exported solenoid valve, instrument still is in power failure state, and pto stops the rotation.After outage, when having only the 12V power supply to be switched on once more, pressing power take-off valve makes the B contact get electric closure, left side relay, right relay coil gets, left side relay, right relay normally open contact gets electric closure, the 12V power supply is transferred to the output terminal ZN 87 of right relay by the input end BR30 of right relay, make the input end ZN30 of the left relay normally open contact that is connected with the output terminal ZN 87 of the normally opened contact of right relay obtain power supply, thereby make the power output solenoid valve that is connected with the output terminal VG87 of left relay normally open contact, instrument gets electric, and pto begins rotation.The utility model is in when work, avoided tractor because of burst accident stop operation back, the not startup once more before the deenergization.
Claims (1)
1. the power output safety protective gear of a tractor; comprise left relay; right relay; power take-off valve and power output solenoid valve; it is characterized in that: an end of power take-off valve A contact respectively with an end of power take-off valve B contact; the input end of wire harness connector assembly (R) connects; the other end of power take-off valve A contact is connected with the input end (V) of wire harness connector assembly; the other end of power take-off valve B contact is connected with the input end (ZN) of wire harness connector assembly; the output terminal of wire harness connector assembly (V) is connected with the input end (V85) of left relay coil; the output terminal of wire harness connector assembly (ZN) respectively with the input end (ZN85) of right relay coil; the output terminal (ZN87) of right relay normally open contact; the input end (ZN30) of left side relay normally open contact connects; the output terminal of wire harness connector assembly (R) respectively with the 12V power supply; the input end (BR30) of right relay normally open contact connects; the output terminal (86) of left side relay coil and the output terminal (86) of right relay coil be ground connection respectively, and the output terminal of left relay normally open contact (VG87) is exported solenoid valve with power respectively; instrument connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200910901U CN202039953U (en) | 2011-03-31 | 2011-03-31 | Power take-off safety protection device of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200910901U CN202039953U (en) | 2011-03-31 | 2011-03-31 | Power take-off safety protection device of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202039953U true CN202039953U (en) | 2011-11-16 |
Family
ID=44967400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200910901U Expired - Lifetime CN202039953U (en) | 2011-03-31 | 2011-03-31 | Power take-off safety protection device of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202039953U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157928A (en) * | 2011-03-31 | 2011-08-17 | 上海纽荷兰农业机械有限公司 | Power output safety protection device for tractor |
-
2011
- 2011-03-31 CN CN2011200910901U patent/CN202039953U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157928A (en) * | 2011-03-31 | 2011-08-17 | 上海纽荷兰农业机械有限公司 | Power output safety protection device for tractor |
| CN102157928B (en) * | 2011-03-31 | 2013-10-09 | 上海纽荷兰农业机械有限公司 | Power output safety protection device for tractor |
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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: 20111116 Effective date of abandoning: 20131009 |
|
| RGAV | Abandon patent right to avoid regrant |