CN205001500U - Automatically controlled gearbox hydraulic control device of loader - Google Patents
Automatically controlled gearbox hydraulic control device of loader Download PDFInfo
- Publication number
- CN205001500U CN205001500U CN201520786828.4U CN201520786828U CN205001500U CN 205001500 U CN205001500 U CN 205001500U CN 201520786828 U CN201520786828 U CN 201520786828U CN 205001500 U CN205001500 U CN 205001500U
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- selector
- shelves
- output terminal
- gear selector
- solenoid valve
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- Withdrawn - After Issue
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Abstract
The utility model discloses an automatically controlled gearbox hydraulic control device of loader, including first, second solenoid valve, high low -grade selector, gear selector, K1 shelves-K4 shelves control hydro -cylinder, control circuit controls the switching -over of high low -grade selector and gear selector respectively, and the pressure oil circuit links to each other with the low -grade selector of height, gear selector in proper order, and gear selector output leads to K1 shelves-K4 shelves control hydro -cylinder respectively. The utility model discloses a various combination of the case shift position of high low -grade selector and gear selector is controlled to the permutation and combination of four kinds of differences of first solenoid valve, second solenoid valve break -make electricity to the different break -makes of oil circuit of control K1 shelves control hydro -cylinder to K4 shelves control hydro -cylinder, the function of can realize ging forward fourth gear, the fourth gear that reverses and self shifter. The transmission performance is good, the performance of shifting is good, use the reliability height, control manipulation intensity light, the reduction driver, improves complete machine work efficiency.
Description
Technical field
The utility model relates to a kind of speed change gear of loader, particularly relates to a kind of more than 8 tons large-tonnage loader fixed shaft type electrohydraulic dynamics and to shift gears the hydraulic control device of many gear gearboxes, belong to hydraulic transmission technology field.
Background technique
Since the eighties in 20th century, more than 8 tons large-tonnage loaders obtain applying more and more widely in engineering construction, material transportation, the many employings of its gearbox adopt that dust inspires confidence in, the loader fixed shaft type electrohydraulic dynamic of De Na, little Song is shifted gears many gear gearboxes, this gearbox designs is complicated, inconvenient maintenance.Its speed changer gear operation adopts most pattern adopting pressurized control, each different gear controls the break-make of guide oil and working connection by the combination of several different solenoid valve, thus obtain required each shelves speed, operationally the Returnning spring of spool is in compressive state all the time, easily cause spring fatigue failures, and the logicality of electrical wiring is very complicated.
Model utility content
The purpose of this utility model is to provide the loader electrically controlled gearbox hydraulic control device that a kind of bearing capacity is high, transmitting torque is large.
The utility model is achieved by the following technical programs:
A kind of loader electrically controlled gearbox hydraulic control device, comprise the first solenoid valve, the second solenoid valve, high and low shift selector, gear selector, K1 shelves control oil cylinder, K2 shelves control oil cylinder, K3 shelves control oil cylinder and K4 shelves control oil cylinder, oil circuit control is connected with high and low shift selector control end, gear selector control end respectively, oil circuit control is also connected with the first solenoid valve input end, the second solenoid valve input end respectively by oil purifier, and the first solenoid valve output terminal, the second solenoid valve output terminal lead to fuel tank respectively; Pressure oil circuit is divided into five tunnels and is connected to the 5th input end with high and low shift selector first respectively, high and low shift selector first output terminal leads to returning quickly valve after being connected with gear selector first output terminal, high and low shift selector second output terminal is connected with gear selector first input end, high and low shift selector the 3rd output terminal is connected with gear selector second output terminal, high and low shift selector the 4th output terminal is connected with gear selector the 5th output terminal, and high and low shift selector the 5th output terminal leads to K2 shelves after being connected with gear selector the 4th output terminal and controls oil cylinder back cavity; Gear selector second output terminal leads to K4 shelves and controls oil cylinder back cavity, and gear selector the 3rd output terminal leads to K3 shelves and controls oil cylinder back cavity, and gear selector the 5th output terminal leads to K1 shelves and controls oil cylinder back cavity; High and low shift selector the 3rd input end, high and low shift selector four-input terminal lead to fuel tank by the first one-way valve after being connected with high and low shift selector the 5th input end, and gear selector second input end, gear selector the 3rd input end, gear selector four-input terminal lead to fuel tank by the second one-way valve after being connected with gear selector the 5th input end.
The purpose of this utility model can also be realized further by following technical measures.
Aforesaid loader electrically controlled gearbox hydraulic control device, the oil strain precision of wherein said oil purifier is 100 ~ 150 μ.
Aforesaid loader electrically controlled gearbox hydraulic control device, wherein said first solenoid valve and the second solenoid valve are 2/2-way solenoid valve, are provided with throttle orifice in the passage of the connection position of described 2/2-way solenoid valve.
Aforesaid loader electrically controlled gearbox hydraulic control device, wherein oil circuit control is connected with gear selector control end, high and low shift selector control end respectively by flow controller.
Aforesaid loader electrically controlled gearbox hydraulic control device, wherein said high and low shift selector is two 12 logical hydraulic operated valves.Described gear selector is two 10 logical hydraulic operated valves.
Aforesaid loader electrically controlled gearbox hydraulic control device, wherein said K1 shelves control oil cylinder, K2 shelves control oil cylinder, K3 shelves control oil cylinder and K4 shelves control oil cylinder is single action piston oil cylinder.
The linkage structure of the first solenoid valve of the present utility model, the second solenoid valve and high and low shift selector, gear selector is by the first solenoid valve, four kinds of the second solenoid valve power on/off different permutation and combination, control the various combination of the spool mobile position of high and low shift selector and gear selector, thus control K1 shelves control the different break-make of oil circuit that oil cylinder to K4 shelves control oil cylinder, can realize advance fourth gear, the fourth gear that falls back and self-shifting function.Transmission performance is good, gearshift performance is good, operational safety is high, it is light to handle, simple, gearshift is rapid, realizes the gearshift of not stopping when having load.Reduce the manipulation intensity of driver, improve complete machine working efficiency.
Advantage and disadvantage of the present utility model, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below, these embodiments, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the utility model hydraulic schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises the first solenoid valve 1, second solenoid valve 2, high and low shift selector 3, gear selector 4, K1 shelves control oil cylinder 10, K2 shelves control oil cylinder 20, K3 shelves control oil cylinder 30 and K4 shelves control oil cylinder 40, oil circuit control 50 is divided into two-way, one tunnel is connected with high and low shift selector control end 310, another road is connected with gear selector control end 410, and the oil purifier 5 that oil circuit control 50 is also 150 μ by oil strain precision is connected with the first solenoid valve input end, the second solenoid valve input end respectively.First solenoid valve output terminal, the second solenoid valve output terminal lead to fuel tank 6 respectively.Oil circuit control 50 is connected with gear selector control end 410, high and low shift selector control end 310 respectively by flow controller 51, and flow controller 51 plays time delay and pressure maintaining effect.K1 shelves control oil cylinder 10, K2 shelves control oil cylinder 20, K3 shelves control oil cylinder 30 and K4 shelves control oil cylinder 40 is single action piston oil cylinder.
First solenoid valve 1 and the second solenoid valve 2 are 2/2-way solenoid valve, are provided with throttle orifice 21 in the passage of the connection position of described 2/2-way solenoid valve.High and low shift selector 3 is two 12 logical hydraulic operated valves, and gear selector 4 is two 10 logical hydraulic operated valves.
Pressure oil circuit 60 is divided into five tunnels and is connected with high and low shift selector first input end 31 to high and low shift selector the 5th input end 35 respectively, high and low shift selector first output terminal 31' leads to returning quickly valve (not drawing in Fig. 1) after being connected with gear selector first output terminal 41', high and low shift selector second output terminal 32' is connected with gear selector first input end 41, high and low shift selector the 3rd output terminal 33' is connected with gear selector second input end 42, high and low shift selector the 4th output terminal 34' is connected with gear selector the 5th input end 45, high and low shift selector the 5th output terminal 35' leads to K2 shelves after being connected with gear selector the 4th output terminal 44' and controls oil cylinder 20 back cavity, gear selector second output terminal 42' leads to K4 shelves and controls oil cylinder 40 back cavity, and gear selector the 3rd output terminal 43' leads to K3 shelves and controls oil cylinder 30 back cavity, and gear selector the 5th output terminal 45' leads to K1 shelves and controls oil cylinder 10 back cavity, high and low shift selector the 3rd input end 33, high and low shift selector four-input terminal 34 lead to fuel tank 8 by the first one-way valve 61 after being connected with high and low shift selector the 5th input end 35, and gear selector second input end 42, gear selector the 3rd input end 43, gear selector four-input terminal 44 lead to fuel tank 8 by the second one-way valve 62 after being connected with gear selector the 5th input end 45.
Four gear speed-changing processes of the present utility model are as follows:
1, the first solenoid valve 1, second solenoid valve 2 is all in the right position state of power-off, the elastic force of pilot pressure oil oil pressure to the thrust of spool and high and low shift selector spring 300 of P2=1MPa keeps balancing, and also keeps balancing with the elastic force of gear selector spring 400.Now, high and low shift selector 3 spool is in the function 3 of left position, and gear selector 4 spool is in the function 1 of left position; The principal pressure oil of P=2.3MPa is sequentially through high and low shift selector input end 33, high and low shift selector output end 34', gear selector the 5th input end 45, gear selector the 4th output terminal 44', directly enter K2 shelves and control oil cylinder 20 back cavity, K2 shelves clutch engages, and loader runs with the speed of K2 shelves.
2, the first solenoid valve 1 is in the left position state of power-off, and the second solenoid valve 2 is in the right position state of energising; On the left of gear selector 4, the pilot pressure oil of P2=1MPa returns into fuel tank 8 by the throttling pore of the second left position of solenoid valve 1, under the resilient force of gear selector spring 400, gear selector 4 commutation is in the function 2 of right position, and high and low shift selector 3 spool is still in the function 3 of left position; The principal pressure oil of P=2.3MPa enters K1 shelves control oil cylinder 10 back cavity sequentially through high and low shift selector the 3rd input end 33, high and low shift selector the 4th output terminal 34', gear selector the 5th input end 45, gear selector the 5th output terminal 45', K1 shelves clutch engages, and loader runs with the speed of K1 shelves.
3, the first solenoid valve 1 is in the left position state of energising, second solenoid valve 2 is in the right position state of power-off, on the left of high and low shift selector 3, the pilot pressure oil of P2=1MPa returns into fuel tank 8 by the throttling pore of the second solenoid valve 2, under the resilient force of gear selector spring 300, high and low shift selector 3 commutation is in the function 4 of right position, and gear selector 4 spool is in the function 1 of left position; The principal pressure oil P of P=2.3MPa enters K3 shelves control oil cylinder 30 back cavity sequentially through high and low shift selector the 3rd input end 33, high and low shift selector the 3rd output terminal 33', gear selector second input end 42, gear selector the 3rd output terminal 43', K3 shelves clutch engages, and loader runs with the speed of K3 shelves.
4, the first solenoid valve 1, second solenoid valve 2 is all in the left position state of energising, on the left of high and low shift selector 3, the pilot pressure oil of P2=1MPa returns into fuel tank 8 by the throttling pore of the second solenoid valve 2, and on the left of gear selector 4, the pilot pressure oil of P2=1MPa is returned into fuel tank 8 by the throttling pore of the second left position of solenoid valve 1.Under the resilient force of gear selector spring 300, the commutation of high and low shift selector 3 is in the function 4 of right position; Under the resilient force of gear selector spring 400, gear selector 4 commutation is in the function 2 of right position; The principal pressure oil P of P=2.3MPa enters K4 shelves control oil cylinder 40 back cavity sequentially through high and low shift selector the 3rd input end 33, high and low shift selector the 3rd output terminal 33', gear selector second input end 42, gear selector second output terminal 42', K4 shelves clutch engages, and loader runs with the speed of K4 shelves.
In addition to the implementation, the utility model can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (7)
1. a loader electrically controlled gearbox hydraulic control device, it is characterized in that: comprise the first solenoid valve, the second solenoid valve, high and low shift selector, gear selector, K1 shelves control oil cylinder, K2 shelves control oil cylinder, K3 shelves control oil cylinder and K4 shelves control oil cylinder, oil circuit control is connected with high and low shift selector control end, gear selector control end respectively, oil circuit control is also connected with the first solenoid valve input end, the second solenoid valve input end respectively by oil purifier, and the first solenoid valve output terminal, the second solenoid valve output terminal lead to fuel tank respectively; Pressure oil circuit is divided into five tunnels and is connected to the 5th input end with high and low shift selector first respectively, high and low shift selector first output terminal leads to returning quickly valve after being connected with gear selector first output terminal, high and low shift selector second output terminal is connected with gear selector first input end, high and low shift selector the 3rd output terminal is connected with gear selector second output terminal, high and low shift selector the 4th output terminal is connected with gear selector the 5th output terminal, and high and low shift selector the 5th output terminal leads to K2 shelves after being connected with gear selector the 4th output terminal and controls oil cylinder back cavity; Gear selector second output terminal leads to K4 shelves and controls oil cylinder back cavity, and gear selector the 3rd output terminal leads to K3 shelves and controls oil cylinder back cavity, and gear selector the 5th output terminal leads to K1 shelves and controls oil cylinder back cavity; High and low shift selector the 3rd input end, high and low shift selector four-input terminal lead to fuel tank by the first one-way valve after being connected with high and low shift selector the 5th input end, and gear selector second input end, gear selector the 3rd input end, gear selector four-input terminal lead to fuel tank by the second one-way valve after being connected with gear selector the 5th input end.
2. loader electrically controlled gearbox hydraulic control device as claimed in claim 1, is characterized in that: the oil strain precision of described oil purifier is 100 ~ 150 μ.
3. loader electrically controlled gearbox hydraulic control device as claimed in claim 1, is characterized in that: described first solenoid valve and the second solenoid valve are 2/2-way solenoid valve, is provided with throttle orifice in the passage of the connection position of described 2/2-way solenoid valve.
4. loader electrically controlled gearbox hydraulic control device as claimed in claim 1, is characterized in that: oil circuit control is connected with gear selector control end, high and low shift selector control end respectively by flow controller.
5. loader electrically controlled gearbox hydraulic control device as claimed in claim 1, is characterized in that: described high and low shift selector is two 12 logical hydraulic operated valves.
6. loader electrically controlled gearbox hydraulic control device as claimed in claim 1, is characterized in that: described gear selector is two 10 logical hydraulic operated valves.
7. loader electrically controlled gearbox hydraulic control device as claimed in claim 1, is characterized in that: described K1 shelves control oil cylinder, K2 shelves control oil cylinder, K3 shelves control oil cylinder and K4 shelves control oil cylinder is single action piston oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520786828.4U CN205001500U (en) | 2015-10-13 | 2015-10-13 | Automatically controlled gearbox hydraulic control device of loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520786828.4U CN205001500U (en) | 2015-10-13 | 2015-10-13 | Automatically controlled gearbox hydraulic control device of loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205001500U true CN205001500U (en) | 2016-01-27 |
Family
ID=55158388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520786828.4U Withdrawn - After Issue CN205001500U (en) | 2015-10-13 | 2015-10-13 | Automatically controlled gearbox hydraulic control device of loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205001500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221741A (en) * | 2015-10-13 | 2016-01-06 | 中外合资沃得重工（中国）有限公司 | Loader electrically controlled gearbox hydraulic control device |
| CN106763715A (en) * | 2017-02-07 | 2017-05-31 | 上海上汽马瑞利动力总成有限公司 | Shelves system is hung in a kind of 8 gear hydraulic pressure choosing |
-
2015
- 2015-10-13 CN CN201520786828.4U patent/CN205001500U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221741A (en) * | 2015-10-13 | 2016-01-06 | 中外合资沃得重工（中国）有限公司 | Loader electrically controlled gearbox hydraulic control device |
| CN106763715A (en) * | 2017-02-07 | 2017-05-31 | 上海上汽马瑞利动力总成有限公司 | Shelves system is hung in a kind of 8 gear hydraulic pressure choosing |
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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 | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160127 Effective date of abandoning: 20170620 |