CN203453167U - Power reversing inching valve block for tractor - Google Patents

Power reversing inching valve block for tractor Download PDF

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Publication number
CN203453167U
CN203453167U CN201320535082.0U CN201320535082U CN203453167U CN 203453167 U CN203453167 U CN 203453167U CN 201320535082 U CN201320535082 U CN 201320535082U CN 203453167 U CN203453167 U CN 203453167U
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CN
China
Prior art keywords
valve
solenoid valve
hydraulic control
power
proportional
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
Application number
CN201320535082.0U
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Chinese (zh)
Inventor
张凯
刘超
刘涛
王巧灵
尚彩红
柴景阳
张建通
张学谦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
First Tractor Co Ltd
Original Assignee
First Tractor Co Ltd
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Publication date
Application filed by First Tractor Co Ltd filed Critical First Tractor Co Ltd
Priority to CN201320535082.0U priority Critical patent/CN203453167U/en
Application granted granted Critical
Publication of CN203453167U publication Critical patent/CN203453167U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

Provided is a power reversing inching valve block for a high and medium power tractor. The power reversing inching valve block comprises a proportional pressure regulating valve, a power output solenoid valve, a forward gear solenoid valve, a hydraulic control proportional reversing valve, a proportional inching valve and a reverse gear solenoid valve, wherein an outlet of the proportional pressure regulating valve is connected with an inlet of the proportional inching valve, an outlet of the proportional inching valve is connected with an inlet of the hydraulic control proportional reversing valve, the forward gear solenoid valve is connected with the right end of the hydraulic control proportional reversing valve, the reverse gear solenoid valve is connected with the left end of the hydraulic control proportional reversing valve, the outlet of the proportional inching valve is connected with the inlet of the hydraulic control proportional reversing valve, and an inlet of the proportional pressure regulating valve is connected with an inlet of the power output solenoid valve, an inlet of the forward gear solenoid valve and an inlet of the reverse gear solenoid valve at the same time. The inching valve is used for achieving connection and disconnection between power of an engine and power of a power train, the whole process from complete disconnection, progressively-increasing type connection to complete connection is achieved, and due to the fact that the power output solenoid valve is integrated in the valve block, connection and disconnection of a power output shaft can be controlled.

Description

Used with tractor power commutation little progress valve piece
Technical field
The utility model belongs to tractor field, relates to a kind of high and medium power used with tractor power commutation little progress valve piece.
Background technique
At present, high and medium power used with tractor power selector valve only has power commutation function, cannot when not changing gear jointing state, cut off power, must support the use with mechanical clutch.In order to overcome this shortcoming, be necessary to develop a kind of high and medium power used with tractor power commutation little progress valve piece, with the inner integrated little progress valve of this valve piece, realize joint and the interruption of power between reasonable match, make it have from interrupting completely, progressive incremental is engaged to the overall process engaging completely, in order to substitute the repertoire of traditional mechanical clutch.This valve piece inside is also integrated with power output solenoid valve, can control the Engage and disengage of pto＝power take-off.
Model utility content
The purpose of this utility model is to provide a kind of compact structure, easy to operate, service-strong high and medium power used with tractor power commutation little progress valve piece.
The technical solution of the utility model is: high and medium power used with tractor power commutation little progress valve piece, comprising: proportional pressure valve, power output solenoid valve, forward gear solenoid valve, hydraulic control proportional reversing valve, ratio little progress valve, retreat gear solenoid valve; The outlet of proportional pressure valve is connected with the import of ratio little progress valve; The outlet of ratio little progress valve is connected with the import of hydraulic control proportional reversing valve; Forward gear solenoid valve is connected with the right-hand member of hydraulic control proportional reversing valve; Retreating gear solenoid valve is connected with the left end of hydraulic control proportional reversing valve; The outlet of ratio little progress valve is connected with the import of hydraulic control proportional reversing valve; The import of proportional pressure valve is connected with import, the import of forward gear solenoid valve of power output solenoid valve, the import that retreats gear solenoid valve simultaneously.
The utility model can reach following beneficial effect after adopting technique scheme: with little progress valve, realize joint and the interruption of power between reasonable match, and have from interrupting completely, progressive incremental is engaged to the overall process engaging completely, substituted the repertoire of traditional mechanical clutch; Little progress valve adopts mechanical push-and-pull operation type, by flexible axle, is connected with foot treadle, and method of operating and driving experience and mechanical clutch are in full accord; This valve piece inside is also integrated with power output solenoid valve, can control the Engage and disengage of pto＝power take-off; Compact structure, easy to operate, use reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model used with tractor power commutation little progress valve piece.
Embodiment
Below by accompanying drawing, the utility model is further described: as shown in Figure 1, used with tractor power commutation little progress valve piece, comprising: proportional pressure valve 1, power output solenoid valve 2, forward gear solenoid valve 3, hydraulic control proportional reversing valve 4, ratio little progress valve 5, retreat gear solenoid valve 6.The outlet A of proportional pressure valve 1 is connected with the import B of ratio little progress valve 5; The outlet C of ratio little progress valve 5 is connected with the import D of hydraulic control proportional reversing valve 4; Forward gear solenoid valve 3 is connected with the right-hand member E of hydraulic control proportional reversing valve 4; Retreating gear solenoid valve 6 is connected with the left end F of hydraulic control proportional reversing valve 4; The outlet C of ratio little progress valve 5 is connected with the import D of hydraulic control proportional reversing valve 4; The import G of proportional pressure valve 1 is connected with import H, the forward gear solenoid valve 3 import I of power output solenoid valve 2, the import J that retreats gear solenoid valve 6 simultaneously.
Proportional pressure valve 1 is stabilized in 2MPa left and right by charge oil pressure, and this pressure oil-source is delivered to ratio little progress valve 5, and the fluid after 5 modulation of ratio little progress valve is supplied with hydraulic control proportional reversing valve 4.After forward gear solenoid valve 3 energising, the fluid of the import G of proportional pressure valve 1 is caused to the right-hand member E of hydraulic control proportional reversing valve 4, and promote hydraulic control proportional reversing valve 4 and be moved to the left.Fluid after 5 modulation of ratio little progress valve is supplied with forward gear hydraulic coupling and is made it by hydraulic control proportional reversing valve 4 and engages, and completes the joint of forward gear.If wanting to lower the speed of a motor vehicle, driver do not reduce engine throttle, gently stepping on clutch pedal.Clutch pedal moves right the spool of ratio little progress valve 5 by flexible axle, reduces the activating pressure of forward gear hydraulic coupling.Delivery pressure and its spool stroke of ratio little progress valve 5 are inversely proportional, and spool stroke is larger, and delivery pressure is less, until reduce to zero, make forward gear hydraulic coupling thoroughly separated.After retreating the energising of gear solenoid valve 6, the fluid of the import G of proportional pressure valve 1 is caused to the left end F of hydraulic control proportional reversing valve 4, and promote hydraulic control proportional reversing valve 4 and move right.Fluid after 5 modulation of ratio little progress valve is supplied with to retreat gear hydraulic coupling and make it by hydraulic control proportional reversing valve 4 and is engaged, and completes the joint that retreats gear.

Claims (1)

1. high and medium power used with tractor power commutation little progress valve piece, comprising: proportional pressure valve (1), power output solenoid valve (2), forward gear solenoid valve (3), hydraulic control proportional reversing valve (4), ratio little progress valve (5), retreat gear solenoid valve (6); It is characterized in that: the outlet (A) of proportional pressure valve (1) is connected with the import (B) of ratio little progress valve (5); The outlet (C) of ratio little progress valve (5) is connected with the import (D) of hydraulic control proportional reversing valve (4); Forward gear solenoid valve (3) is connected with the right-hand member (E) of hydraulic control proportional reversing valve (4); Retreating gear solenoid valve (6) is connected with the left end (F) of hydraulic control proportional reversing valve (4); The outlet (C) of ratio little progress valve (5) is connected with the import (D) of hydraulic control proportional reversing valve (4); The import (G) of proportional pressure valve (1) is connected with import (H), forward gear solenoid valve (3) import (I) of power output solenoid valve (2), the import (J) that retreats gear solenoid valve (6) simultaneously.
CN201320535082.0U 2013-08-30 2013-08-30 Power reversing inching valve block for tractor Expired - Lifetime CN203453167U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320535082.0U CN203453167U (en) 2013-08-30 2013-08-30 Power reversing inching valve block for tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320535082.0U CN203453167U (en) 2013-08-30 2013-08-30 Power reversing inching valve block for tractor

Publications (1)

Publication Number Publication Date
CN203453167U true CN203453167U (en) 2014-02-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320535082.0U Expired - Lifetime CN203453167U (en) 2013-08-30 2013-08-30 Power reversing inching valve block for tractor

Country Status (1)

Country Link
CN (1) CN203453167U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104196803A (en) * 2014-09-11 2014-12-10 中国农业大学 Multifunctional thread insertion valve used for heavy tractor electro-hydraulic lifter
CN106837909A (en) * 2017-03-30 2017-06-13 苏州日川精密仪器有限公司 Easy adjustable type hydraulic valve assembly
CN108317280A (en) * 2018-04-18 2018-07-24 第拖拉机股份有限公司 A kind of used with tractor power reversal valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104196803A (en) * 2014-09-11 2014-12-10 中国农业大学 Multifunctional thread insertion valve used for heavy tractor electro-hydraulic lifter
CN106837909A (en) * 2017-03-30 2017-06-13 苏州日川精密仪器有限公司 Easy adjustable type hydraulic valve assembly
CN108317280A (en) * 2018-04-18 2018-07-24 第拖拉机股份有限公司 A kind of used with tractor power reversal valve
CN108317280B (en) * 2018-04-18 2023-11-21 第一拖拉机股份有限公司 Power reversing valve for tractor

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GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20140226

CX01 Expiry of patent term