CN203604618U - Hydraulic control system of hydraulic drive transmission - Google Patents
Hydraulic control system of hydraulic drive transmission Download PDFInfo
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- CN203604618U CN203604618U CN201320633557.XU CN201320633557U CN203604618U CN 203604618 U CN203604618 U CN 203604618U CN 201320633557 U CN201320633557 U CN 201320633557U CN 203604618 U CN203604618 U CN 203604618U
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- valve
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- inlet end
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 12
- 239000002828 fuel tank Substances 0.000 claims description 10
- 238000005461 lubrication Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 230000003139 buffering effect Effects 0.000 abstract 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 17
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- -1 strainer Substances 0.000 description 1
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Abstract
The utility model discloses a hydraulic control system of a hydraulic drive transmission. The control system comprises an oil tank, an oil outlet of the oil tank is communicated with a coarse filter, an inlet end of an oil pump is communicated with the coarse filter, an outlet end of the oil pump is communicated with a fine filter, the fine filter is further respectively connected with an inlet end of a throttling valve and an inlet end of a pressure reducing valve, an outlet end of the throttling valve is communicated with an inlet end of an inching valve, an outlet end of the inching valve is respectively communicated with an inlet end of a buffering valve and an inlet end of a gear shifting valve, an outlet end of the pressure reducing valve is communicated with an inlet end of a torque converter, an overflow valve is arranged between the pressure reducing valve and the torque converter, an inlet end of the overflow valve is further communicated with an outlet end of the pressure reducing valve, an overflow port of the overflow valve is communicated with an inlet end of a cooler, the inlet end of the cooler is further connected with an outlet end of the torque converter, and the cooler is communicated with an inlet end of a lubricating system. The hydraulic control system can improve the filtering effect of oil liquid, reduce the fault rate of itself, improve the cooling effect and lower the heat balance temperature of the transmission and is simple in structure.
Description
Technical field:
The utility model relates to gear box hydraulic control apparatus technical field, relates in particular a kind of fork truck hydraulic transmission gearbox hydraulic control system.
Background technique:
At present, fork truck is manufactured the hydraulic transmission gearbox hydraulic control system in field, as shown in Figure 1, after its secondary filter 4a is located at reduction valve 12a, the flow-off of relief valve 13a is directly communicated with fuel tank 1a, and major defect is: 1, cooling effect is bad, because the fluid flowing out from flow-off through relief valve 13a is not cooling through supercooler 15a, but be directly back in fuel tank 1a, the oil liquid temperature that makes to enter fuel tank 1a is very high, thereby makes gearbox thermal equilibrium temperature higher.2, because fluid is just by directly entering after the coarse filtration of strainer 2a in reduction valve 12a and shift valve 9a, its lubrication oil filtration effect is bad, makes spool rate of fault high, makes hydraulic control system easily produce fault, reduces working life.
Model utility content:
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of hydraulic transmission gearbox hydraulic control system is provided, it can improve the filtering effect of fluid, reduce the rate of fault of hydraulic control system, simultaneously, it can improve cooling effect, reduces gearbox thermal equilibrium temperature, and simple in structure.
The scheme that the utility model solve the technical problem is:
A kind of hydraulic transmission gearbox hydraulic control system, comprises fuel tank, strainer, oil pump, secondary filter, bypass valve, throttle valve, inching valve, trimmer valve, shift valve, reduction valve, relief valve, torque-converters, cooler, lubrication system and variable throttle valve, the oil outlet of described fuel tank is connected with the filler opening of strainer, oil pump entry end is connected with the oil outlet of strainer, oil pump outlet end is connected with the entrance point of secondary filter, the entrance point of bypass valve and outlet end are connected with outlet end and the entrance point of secondary filter respectively, the outlet end of secondary filter is also connected with the entrance point of throttle valve and the entry end of reduction valve respectively, the outlet end of throttle valve is connected with the entry end of inching valve, the outlet end of inching valve is connected with the entry end of trimmer valve and shift valve respectively, the outlet end of reduction valve is connected with the entry end of torque-converters, between reduction valve and torque-converters, be provided with relief valve, the entry end of relief valve is connected with the outlet end of reduction valve, the flow-off of relief valve is connected with the entry end of cooler, the entry end of cooler is also connected with the outlet end of torque-converters, the outlet end of cooler is connected with the entrance point of lubrication system.
Described secondary filter is located between the outlet end and reduction valve entry end of oil pump.
The P2 mouth of described shift valve is connected with the filler opening of clutch F, the P1 mouth of shift valve is connected with the filler opening of clutch R.
Outstanding effect of the present utility model is:
Compared with prior art, it is located at secondary filter between the outlet end and reduction valve entry end of oil pump, thereby to fluid process secondary filter, reduce the impurity in fluid, thereby the fluid that makes to enter reduction valve and shift valve is cleaner, reduce the rate of fault in hydraulic control system, improve the working life of equipment; Simultaneously, it is cooling that the fluid that its flow-off by relief valve flows out carries out cooler, and again cooled fluid is passed in lubrication system, reduced like this temperature of its fluid, fluid after cooling can move in lubrication system, and gearbox thermal equilibrium temperature can be reduced.
Accompanying drawing explanation:
Fig. 1 is the structural representation of existing hydraulic control system;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the structural representation between inching valve and the variable throttle valve in it.
Embodiment:
Embodiment, see shown in Fig. 2 and Fig. 3, a kind of hydraulic transmission gearbox hydraulic control system, comprises fuel tank 1, strainer 2, oil pump 3, secondary filter 4, bypass valve 5, throttle valve 6, inching valve 7, trimmer valve 8, shift valve 9, reduction valve 12, relief valve 13, torque-converters 14, cooler 15, lubrication system 16 and variable throttle valve 17, the oil outlet of described fuel tank 1 is connected with the filler opening of strainer 2, oil pump 3 entry ends are connected with the oil outlet of strainer 2, oil pump 3 outlet end are connected with the entrance point of secondary filter 4, the entrance point of bypass valve 5 and outlet end are connected with outlet end and the entrance point of secondary filter 4 respectively, the outlet end of secondary filter 4 is also connected with the entrance point of throttle valve 6 and the entry end of reduction valve 12 respectively, the outlet end of throttle valve 6 is connected with the entry end of inching valve 7, the outlet end of inching valve 7 is connected with the entry end of trimmer valve 8 and shift valve 9 respectively, in inching valve 7, be also provided with variable throttle valve 17, the outlet end of reduction valve 12 is connected with the entry end of torque-converters 14, between reduction valve 12 and torque-converters, be provided with relief valve 13, the entry end of relief valve 13 is connected with the outlet end of reduction valve 12, the flow-off of relief valve 13 is connected with the entry end of cooler 15, the entry end of cooler 15 is also connected with the outlet end of torque-converters 14, the outlet end of cooler 15 is connected with the entrance point of lubrication system 16.
Described secondary filter 4 is located between the outlet end and reduction valve 12 entry ends of oil pump 3.
The P2 mouth of described shift valve 9 is connected with the filler opening of clutch F10, the P1 mouth of shift valve 9 is connected with the filler opening of clutch R11, and P2 mouth and P1 mouth are the outlet of two fluid of shift valve 9.Clutch F10 and clutch R11 refer to forward gear clutch and and retreat a grade clutch.
Working principle: fluid enters strainer 2 and filters for the first time from fuel tank 1, then enter then and again filter through secondary filter 4 by oil pump 3, improve the degree of purity of fluid, reduce the impurity being mixed with in it, then fluid is through throttle valve 6, after inching valve 7, enter shift valve 9, enter in clutch F10 or clutch R11 and control finally by mistake shift valve 9, and entered in reduction valve 12 through another road of secondary filter 4, by entering after reduction valve 12 in torque-converters 14 and relief valve 13, it is cooling that fluid after torque-converters 14 enters cooler 15, carry out cooling and also enter cooler 15 from relief valve 13 flow-offs fluid out, last cooling fluid all enters in lubrication system 16, oil liquid temperature is now low, reduce gearbox thermal equilibrium temperature.And fluid is through the secondary filter of strainer 2 and secondary filter 4, improve its filtering effect, make the spool of the valve of hydraulic control system be not easy to damage, improve the working life of hydraulic control system.
In this hydraulic control system, be also provided with bypass valve 5, the impurity in secondary filter 4 can be discharged by it, prevent that secondary filter 4 from stopping up.
Claims (3)
1. a hydraulic transmission gearbox hydraulic control system, is characterized in that: comprise fuel tank (1), strainer (2), oil pump (3), secondary filter (4), bypass valve (5), throttle valve (6), inching valve (7), trimmer valve (8), shift valve (9), reduction valve (12), relief valve (13), torque-converters (14), cooler (15), lubrication system (16) and variable throttle valve (17), the oil outlet of described fuel tank (1) is connected with the filler opening of strainer (2), oil pump (3) entry end is connected with the oil outlet of strainer (2), oil pump (3) outlet end is connected with the entrance point of secondary filter (4), the entrance point of bypass valve (5) and outlet end are connected with outlet end and the entrance point of secondary filter (4) respectively, the outlet end of secondary filter (4) is also connected with the entrance point of throttle valve (6) and the entry end of reduction valve (12) respectively, the outlet end of throttle valve (6) is connected with the entry end of inching valve (7), the outlet end of inching valve (7) is connected with the entry end of trimmer valve (8) and shift valve (9) respectively, the outlet end of reduction valve (12) is connected with the entry end of torque-converters (14), between reduction valve (12) and torque-converters, be provided with relief valve (13), the entry end of relief valve (13) is connected with the outlet end of reduction valve (12), the flow-off of relief valve (13) is connected with the entry end of cooler (15), the entry end of cooler (15) is also connected with the outlet end of torque-converters (14), the outlet end of cooler (15) is connected with the entrance point of lubrication system (16).
2. a kind of hydraulic transmission gearbox hydraulic control system according to claim 1, is characterized in that: described secondary filter (4) is located between the outlet end and reduction valve (12) entry end of oil pump (3).
3. a kind of hydraulic transmission gearbox hydraulic control system according to claim 1, is characterized in that: the P2 mouth of described shift valve (9) and clutch F(10) filler opening be connected, P1 mouth and the clutch R(11 of shift valve (9)) filler opening be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320633557.XU CN203604618U (en) | 2013-10-14 | 2013-10-14 | Hydraulic control system of hydraulic drive transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320633557.XU CN203604618U (en) | 2013-10-14 | 2013-10-14 | Hydraulic control system of hydraulic drive transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604618U true CN203604618U (en) | 2014-05-21 |
Family
ID=50717292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320633557.XU Expired - Lifetime CN203604618U (en) | 2013-10-14 | 2013-10-14 | Hydraulic control system of hydraulic drive transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203604618U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595480A (en) * | 2015-01-05 | 2015-05-06 | 安徽维麦科斯机械制造有限公司 | Internal combustion hydraulic forklift transmission safety limiting system |
| CN108302079A (en) * | 2018-04-04 | 2018-07-20 | 徐工集团工程机械股份有限公司科技分公司 | A kind of gearbox dynamic output control system and control method |
-
2013
- 2013-10-14 CN CN201320633557.XU patent/CN203604618U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595480A (en) * | 2015-01-05 | 2015-05-06 | 安徽维麦科斯机械制造有限公司 | Internal combustion hydraulic forklift transmission safety limiting system |
| CN108302079A (en) * | 2018-04-04 | 2018-07-20 | 徐工集团工程机械股份有限公司科技分公司 | A kind of gearbox dynamic output control system and control method |
| CN108302079B (en) * | 2018-04-04 | 2023-08-11 | 徐工集团工程机械股份有限公司科技分公司 | Gearbox power output control system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Hydraulic control system of hydraulic drive transmission Effective date of registration: 20171213 Granted publication date: 20140521 Pledgee: Agricultural Bank of China Limited by Share Ltd. Xinchang county subbranch Pledgor: ZHEJIANG ZHONGCHAI MACHINERY Co.,Ltd. Registration number: 2017330000276 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190718 Granted publication date: 20140521 Pledgee: Agricultural Bank of China Limited by Share Ltd. Xinchang county subbranch Pledgor: ZHEJIANG ZHONGCHAI MACHINERY Co.,Ltd. Registration number: 2017330000276 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |
|
| CX01 | Expiry of patent term |