CN204099575U - The proportional hydraulic control system of fork truck hydraulic transmission gearbox - Google Patents

The proportional hydraulic control system of fork truck hydraulic transmission gearbox Download PDF

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Publication number
CN204099575U
CN204099575U CN201420526386.5U CN201420526386U CN204099575U CN 204099575 U CN204099575 U CN 204099575U CN 201420526386 U CN201420526386 U CN 201420526386U CN 204099575 U CN204099575 U CN 204099575U
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China
Prior art keywords
valve
solenoid directional
directional control
clutch
control valve
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CN201420526386.5U
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Chinese (zh)
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金刚强
王冬剑
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Zhejiang Golden Road Polytron Technologies Inc
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SHAOXING JINDAO GEAR BOX CO Ltd
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Abstract

The utility model discloses a kind of proportional hydraulic control system of fork truck hydraulic transmission gearbox, comprise oil pump, solenoid directional control valve A, solenoid directional control valve B, electro-hydraulic proportion reversing valve, F clutch, R clutch, main pressure regulator valve, fluid torque converter, relief valve and cooler, F clutch is connected with solenoid directional control valve A, R clutch is connected with solenoid directional control valve B, solenoid directional control valve A is connected with oily delivery side of pump through electro-hydraulic proportion reversing valve with after solenoid directional control valve B parallel connection again, oil delivery side of pump is also connected with main pressure regulator valve, fluid torque converter, relief valve and cooler, oil pump is through main pressure regulator valve, fluid torque converter and cooler are connected to lubricating oil path, oil pump is connected to oil return circuit through main pressure regulator valve and relief valve.The technical program adopts electro-hydraulic proportion reversing valve to be primary component, and system is more simple, can realize quick, steady, shock-free gear shift operation, and make the operation of gearbox more comfortable, the life-span of gearbox is longer.

Description

The proportional hydraulic control system of fork truck hydraulic transmission gearbox
Technical field
The utility model belongs to the control technique field of hydraulic transmission gearbox, particularly relates to a kind of proportional hydraulic control system of fork truck hydraulic transmission gearbox.
Background technique
At present, the conventional fluid torque transfer gear box of Domestic Forklift adopts inching valve and solenoid directional control valve combination to control the hydraulic control system of shift process, adopt the gearbox of this control system to have clutch cohesive process to fix, shift process impacts large, the gearshift time is long, and the burning friction plate phenomenon because driver's operating habit lack of standardization causes (making gearbox be in semi-linkage state for a long time as stepped on fine motion pedal for a long time) cannot be avoided, a large amount of power consumption when braking of putting into gear causes oil temperature to rise on fluid torque converter, system energy consumption strengthens, service life reduction.
Summary of the invention
In order to solve above-mentioned technical problem, the purpose of this utility model is to provide a kind of proportional hydraulic control system of fork truck hydraulic transmission gearbox, clutch cohesive process is changed according to different vehicle features, eliminate shift shock, avoid the burning friction plate phenomenon because artificial operating habit lack of standardization causes, the energy ezpenditure that effective control is unnecessary, reduce system energy consumption, improve lifetime of system, realize simultaneously comfortable, steadily, transmission effect fast, make fork truck have humanized driving operation performance.
To achieve the above object, the utility model have employed following technological scheme:
The proportional hydraulic control system of fork truck hydraulic transmission gearbox, comprise oil pump, solenoid directional control valve A, solenoid directional control valve B, electro-hydraulic proportion reversing valve, F clutch, R clutch, main pressure regulator valve, fluid torque converter, relief valve and cooler, F clutch is connected with solenoid directional control valve A, R clutch is connected with solenoid directional control valve B, solenoid directional control valve A is connected with oily delivery side of pump through electro-hydraulic proportion reversing valve with after solenoid directional control valve B parallel connection again, oil delivery side of pump is also connected with main pressure regulator valve, fluid torque converter, relief valve and cooler, oil pump is through main pressure regulator valve, fluid torque converter and cooler are connected to lubricating oil path, oil pump is connected to oil return circuit through main pressure regulator valve and relief valve, when solenoid directional control valve A, solenoid directional control valve B and electro-hydraulic proportion reversing valve all do not work, F clutch and R clutch all connect oil return circuit, are all in separated state, unpowered transmission, and gearbox is neutral position state, when electro-hydraulic proportion reversing valve and solenoid directional control valve A work, partial power oil enters F clutch through electro-hydraulic proportion reversing valve and solenoid directional control valve A, F clutch engages, solenoid directional control valve B does not work, R clutch connects oil return circuit, be in separated state, power move forward direction transmit, gearbox is forward gear state, when electro-hydraulic proportion reversing valve and solenoid directional control valve B work, partial power oil enters R clutch through electro-hydraulic proportion reversing valve and solenoid directional control valve B, R clutch engages, solenoid directional control valve A does not work, F clutch takes back oil and is in separated state, power shrink back direction transmit, gearbox is the gear state that falls back.
As preferably, described solenoid directional control valve A, solenoid directional control valve B and electro-hydraulic proportion reversing valve are two-position three-way valve.
As preferably, the two ends of described oil pump are connected to oil purifier A and oil purifier B respectively.
The utility model is owing to have employed above technological scheme, electro-hydraulic proportion reversing valve is adopted to be the hydraulic control system that primary component forms whole ratio hydraulic transmission gearbox, replace solenoid valve, trimmer valve and the inching valve in legacy system, whole system is more simple, and the engaging process of F, R clutch can be controlled arbitrarily by controller, can realize quick, steady, shock-free gear shift operation, make the operation of gearbox more comfortable, the life-span of gearbox is longer.The utility model changes clutch cohesive process according to different vehicle features, eliminate shift shock, avoid the burning friction plate phenomenon because artificial operating habit lack of standardization causes, the energy ezpenditure that effective control is unnecessary, reduce system energy consumption, improve lifetime of system, realize simultaneously comfortable, steadily, transmission effect fast, make fork truck have humanized driving operation performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is made a detailed explanation.
Embodiment 1:
The proportional hydraulic control system of fork truck hydraulic transmission gearbox as shown in Figure 1, comprise oil pump 2, solenoid directional control valve A13, solenoid directional control valve B14, electro-hydraulic proportion reversing valve 15, F clutch 6, R clutch 7, main pressure regulator valve 8, fluid torque converter 9, relief valve 10 and cooler 11, F clutch 6 is connected with solenoid directional control valve A13, R clutch 7 is connected with solenoid directional control valve B14, solenoid directional control valve A13 is connected through the output terminal of electro-hydraulic proportion reversing valve 15 with oil pump 2 with after solenoid directional control valve B14 parallel connection again, the output terminal of oil pump 2 is also connected with main pressure regulator valve 8, fluid torque converter 9, relief valve 10 and cooler 11, oil pump 2 is through main pressure regulator valve 8, fluid torque converter 9 and cooler 11 are connected to lubricating oil path, oil pump 2 is connected to oil return circuit through main pressure regulator valve 8 and relief valve 10, oil pump 2 provides power oil for this hydraulic system.Main pressure regulator valve 8 and relief valve 10 make system pressure be set as 0.9 ~ 1.1MPa, and unnecessary hydraulic oil enters lubricating oil path flow through torque-converters 9, cooler 11 after main pressure regulator valve 8 overflow after.Torque-converters oil circuit 0.3 ~ 0.5MPa pressure is controlled by relief valve 10.The two ends of described oil pump 2 are connected to oil purifier A1 and oil purifier B3 respectively.Solenoid directional control valve A13, solenoid directional control valve B14 and electro-hydraulic proportion reversing valve 15 are two-position three-way valve.
When solenoid directional control valve A13, solenoid directional control valve B14 and electro-hydraulic proportion reversing valve 15 all do not work, F clutch 6 and R clutch 7 all connect oil return circuit, are all in separated state, unpowered transmission, and gearbox is neutral position state; When electro-hydraulic proportion reversing valve 15 and solenoid directional control valve A13 work, partial power oil enters F clutch 6 through electro-hydraulic proportion reversing valve 15 and solenoid directional control valve A13, F clutch 6 engages, solenoid directional control valve B14 does not work, R clutch 7 connects oil return circuit, be in separated state, power move forward direction transmit, gearbox is forward gear state; When electro-hydraulic proportion reversing valve 15 and solenoid directional control valve B14 work, partial power oil enters R clutch 7 through electro-hydraulic proportion reversing valve 15 and solenoid directional control valve B14, R clutch 7 engages, solenoid directional control valve A13 does not work, F clutch takes back oil and is in separated state, power shrink back direction transmit, gearbox is the gear state that falls back.
It is emphasized that: be only preferred embodiment of the present utility model above, not any pro forma restriction is done to the utility model, every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.

Claims (3)

1. the proportional hydraulic control system of fork truck hydraulic transmission gearbox, is characterized in that, comprises oil pump (2), solenoid directional control valve A (13), solenoid directional control valve B (14), electro-hydraulic proportion reversing valve (15), F clutch (6), R clutch (7), main pressure regulator valve (8), fluid torque converter (9), relief valve (10) and cooler (11), described F clutch (6) is connected with solenoid directional control valve A (13), R clutch (7) is connected with solenoid directional control valve B (14), solenoid directional control valve A (13) is connected through the output terminal of electro-hydraulic proportion reversing valve (15) with oil pump (2) with after solenoid directional control valve B (14) parallel connection again, and the output terminal of oil pump (2) is also connected with main pressure regulator valve (8), fluid torque converter (9), relief valve (10) and cooler (11), oil pump (2) is through main pressure regulator valve (8), fluid torque converter (9) and cooler (11) are connected to lubricating oil path, and oil pump (2) is connected to oil return circuit through main pressure regulator valve (8) and relief valve (10), when solenoid directional control valve A (13), solenoid directional control valve B (14) and electro-hydraulic proportion reversing valve (15) all do not work, F clutch (6) and R clutch (7) all connect oil return circuit, all be in separated state, unpowered transmission, gearbox is neutral position state, when electro-hydraulic proportion reversing valve (15) and solenoid directional control valve A (13) work, partial power oil enters F clutch (6) through electro-hydraulic proportion reversing valve (15) and solenoid directional control valve A (13), F clutch (6) engages, solenoid directional control valve B (14) does not work, R clutch (7) connects oil return circuit, be in separated state, power move forward direction transmit, gearbox is forward gear state, when electro-hydraulic proportion reversing valve (15) and solenoid directional control valve B (14) work, partial power oil enters R clutch (7) through electro-hydraulic proportion reversing valve (15) and solenoid directional control valve B (14), R clutch (7) engages, solenoid directional control valve A (13) does not work, F clutch takes back oil and is in separated state, power shrink back direction transmit, gearbox is the gear state that falls back.
2. the proportional hydraulic control system of fork truck hydraulic transmission gearbox according to claim 1, is characterized in that, the two ends of described oil pump (2) are connected to oil purifier A (1) and oil purifier B (3) respectively.
3. the proportional hydraulic control system of fork truck hydraulic transmission gearbox according to claim 1, it is characterized in that, described electro-hydraulic proportion reversing valve (15), electro-hydraulic proportion reversing valve (15) and solenoid directional control valve A (13) are two-position three-way valve.
CN201420526386.5U 2014-09-12 2014-09-12 The proportional hydraulic control system of fork truck hydraulic transmission gearbox Active CN204099575U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420526386.5U CN204099575U (en) 2014-09-12 2014-09-12 The proportional hydraulic control system of fork truck hydraulic transmission gearbox

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420526386.5U CN204099575U (en) 2014-09-12 2014-09-12 The proportional hydraulic control system of fork truck hydraulic transmission gearbox

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104776169A (en) * 2015-04-22 2015-07-15 福建万润新能源科技有限公司 Quick-reversing clutch device
CN109114217A (en) * 2017-06-22 2019-01-01 内蒙古欧意德发动机有限公司 Shift hydraulic control system, speed changer and automobile
CN109296744A (en) * 2018-09-21 2019-02-01 杭州悦克智控科技有限公司 A kind of hydraulic control system and method reducing loading machine shift shock

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104776169A (en) * 2015-04-22 2015-07-15 福建万润新能源科技有限公司 Quick-reversing clutch device
CN104776169B (en) * 2015-04-22 2017-03-22 福建万润新能源科技有限公司 Quick-reversing clutch device
CN109114217A (en) * 2017-06-22 2019-01-01 内蒙古欧意德发动机有限公司 Shift hydraulic control system, speed changer and automobile
CN109296744A (en) * 2018-09-21 2019-02-01 杭州悦克智控科技有限公司 A kind of hydraulic control system and method reducing loading machine shift shock

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C14 Grant of patent or utility model
GR01 Patent grant
CP03 Change of name, title or address

Address after: 312000 Zhongxing Avenue 22, Zhejiang City, Shaoxing province.

Patentee after: Zhejiang Golden Road Polytron Technologies Inc

Address before: 312000 Zhongxing Avenue 22, Shaoxing, Zhejiang.

Patentee before: SHAOXING JINDAO GEAR BOX CO., LTD.

CP03 Change of name, title or address