CN103994216A - Hydraulic control system for manual steering hydraulic power tractor - Google Patents
Hydraulic control system for manual steering hydraulic power tractor Download PDFInfo
- Publication number
- CN103994216A CN103994216A CN201410202222.1A CN201410202222A CN103994216A CN 103994216 A CN103994216 A CN 103994216A CN 201410202222 A CN201410202222 A CN 201410202222A CN 103994216 A CN103994216 A CN 103994216A
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- Prior art keywords
- valve
- hydraulic
- way hand
- oil
- operated direction
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a hydraulic control system for a manual steering hydraulic power tractor. The hydraulic control system comprises a power pump station, a hydraulic pressure gauge, a hydraulic control valve bank, a plunger type cylinder and a hydraulic motor. The power pump station comprises a motor, an oil tank, a liquid level and liquid temperature gauge, an air filter, an absorbed oil filter, an oil hydraulic pump, a one-way valve, an overflow valve and a return oil filter. The hydraulic control valve bank comprises an M-type three-position four-way hand change-over valve, an overflow valve, a hydraulic change-over valve, a Y-type three-position four-way hand change-over valve, a two-position four-way hand change-over valve, a hydraulic control one-way valve and a throttling valve. By means of the hydraulic control system, control over stretching and contraction of the plunger type cylinder at a working position and changeover between a high driving gear and a low driving gear in the running process can be conveniently achieved under different loading conditions, the system structure is simple, operation is convenient and fast, control is simple, safety and reliability are achieved, and potential safety hazards of operators are eliminated.
Description
Technical field
The present invention relates to a kind of hydraulic control system, relate in particular to a kind of manual steering hydraulic power tractor hydraulic control system.Belong to technical field of hydraulic.
Background technique
At present, normally travelling of semitrailer or full trailer all needs the traction of towing motorcar to realize.Because towing motorcar volume is large, radius of turn is large, higher to site requirements, is not suitable in small space or short distance transhipment, sometimes the job requirements of even can not realizing ideal, and towing motorcar system complex, complex operation, need professional driver, very flexible, inefficiency.Manual steering hydraulic power tractor compact structure, total high size of length and width is little, be highly suitable for on-site or short distance and come and go the unloaded trailer of transfer or short distance transportation underloading goods, can significantly enhance productivity, save time and cost, but owing to will meeting the requirement of the operating modes such as different loads and the different speed of a motor vehicle, most of function of this class car realizes by manpower or other modes at present, complex operation not only, cause working efficiency low, and in working procedure, operator are caused to certain potential safety hazard.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of manual steering hydraulic power tractor hydraulic control system is provided, can realizes easily the motion of executive component under different loads, reduce the system architecture of towing motorcar, simplify the operation, increase work efficiency and Security.
The object of the present invention is achieved like this: a kind of manual steering hydraulic power tractor hydraulic control system, it comprises power pump station, hydraulic control valve group, plunger case and oil hydraulic motor, the oil outlet of described power pump station is connected with the filler opening of hydraulic control valve group, the return opening of described power pump station respectively with return opening and first oil hydraulic motor of hydraulic control valve group, the return opening of the second oil hydraulic motor is connected, described hydraulic control valve group comprises a M type 3-position 4-way hand-operated direction valve, the second relief valve, the 3rd relief valve, hydraulicchange-over valve, Y type 3-position 4-way hand-operated direction valve, the 2nd M type 3-position 4-way hand-operated direction valve, two-position four-way hand-operated direction valve, Pilot operated check valve and throttle valve, a hydraulic fluid port of a described M type 3-position 4-way hand-operated direction valve is connected with the oil outlet of power pump station, another two hydraulic fluid ports are connected with a hydraulic fluid port of the 2nd M type 3-position 4-way hand-operated direction valve with Y type 3-position 4-way hand-operated direction valve respectively, a hydraulic fluid port of described Y type 3-position 4-way hand-operated direction valve is connected with the filler opening of Pilot operated check valve, the oil outlet of described Pilot operated check valve is connected with the filler opening of plunger case by throttle valve, another hydraulic fluid port of described Y type 3-position 4-way hand-operated direction valve is connected with the control hydraulic fluid port of Pilot operated check valve, the filler opening of described hydraulicchange-over valve is connected with the filler opening of hydraulic control valve group, two oil outlets of described hydraulicchange-over valve connect respectively two the second relief valves that system pressure is provided constraints and the 3rd relief valve, the oil outlet of described the second relief valve and the 3rd relief valve respectively with a described M type 3-position 4-way hand-operated direction valve, the 2nd M type 3-position 4-way hand-operated direction valve is connected with a hydraulic fluid port of Y type 3-position 4-way hand-operated direction valve, the control hydraulic fluid port of described hydraulicchange-over valve is connected with the filler opening of Pilot operated check valve, a hydraulic fluid port of described the 2nd M type 3-position 4-way hand-operated direction valve is connected with the filler opening of the first oil hydraulic motor and a hydraulic fluid port of two-position four-way hand-operated direction valve respectively, the oil outlet of described the first oil hydraulic motor is connected with a hydraulic fluid port of two-position four-way hand-operated direction valve, another hydraulic fluid port of described two-position four-way hand-operated direction valve is connected with the oil outlet of the second oil hydraulic motor with a hydraulic fluid port of the 2nd M type 3-position 4-way hand-operated direction valve respectively, a hydraulic fluid port of described two-position four-way hand-operated direction valve is connected with the oil outlet of the second oil hydraulic motor.
Described power pump station comprises motor, fuel tank, liquid level liquid thermometer, air filter, oil absorption filter, oil hydraulic pump, one-way valve and return filter, the output terminal of described motor is connected with oil hydraulic pump, described liquid level liquid thermometer and air filter are all arranged on fuel tank, the filler opening of described oil hydraulic pump is connected with fuel tank by oil absorption filter, the oil outlet of described oil hydraulic pump is connected with the filler opening of hydraulic control valve group by one-way valve, and the return opening of described power pump station is connected with fuel tank by return filter.
The oil outlet of described oil hydraulic pump is connected with the first relief valve of safety protection effect.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention has realized the convenient to operation of tractor, has eliminated operator's potential safety hazard; Being used in conjunction with of hydraulicchange-over valve and two relief valves, has realized plunger case and the independent control that drives working pressure in equipment, has reached the object of different loads operating mode lower prop plug cylinder extension and contraction control; Being used in conjunction with of M type 3-position 4-way hand-operated direction valve and two-position four-way hand-operated direction valve, the series parallel connection that has realized two oil hydraulic motors connects, and has reached quick in running process and has driven at a slow speed the object of gear switch; The hydraulic control system being formed by power pump station, hydraulic control valve Zu He actuator, simple for structure, control simple, safe and reliable.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of manual steering hydraulic power of the present invention tractor hydraulic control system.
Fig. 2 is the hydraulic control valve pack module plan view of a kind of manual steering hydraulic power of the present invention tractor hydraulic control system.
Fig. 3 is the hydraulic control valve pack module left view of a kind of manual steering hydraulic power of the present invention tractor hydraulic control system.
Wherein:
Power pump station 1
Hydralic pressure gauge 2
Hydraulic control valve group 3
Plunger case 4
The first oil hydraulic motor 51
The second oil hydraulic motor 52
Motor 6
Fuel tank 7
Liquid level liquid thermometer 8
Air filter 9
Oil absorption filter 10
Oil hydraulic pump 11
One-way valve 12
The first relief valve 13
Return filter 14
The one M type 3-position 4-way hand-operated direction valve 15
The second relief valve 16
The 3rd relief valve 17
Hydraulicchange-over valve 18
Y type 3-position 4-way hand-operated direction valve 19
The 2nd M type 3-position 4-way hand-operated direction valve 20
Two-position four-way hand-operated direction valve 21
Pilot operated check valve 22
Throttle valve 23.
Embodiment
Referring to Fig. 1-Fig. 3, the present invention relates to a kind of manual steering hydraulic power tractor hydraulic control system, this system comprises power pump station 1, hydralic pressure gauge 2, hydraulic control valve group 3, plunger case 4, the first oil hydraulic motor 51 and the second oil hydraulic motor 52, described power pump station 1 comprises motor 6, fuel tank 7, liquid level liquid thermometer 8, air filter 9, oil absorption filter 10, oil hydraulic pump 11, one-way valve 12, the first relief valve 13 and return filter 14, the output terminal of described motor 6 is connected with oil hydraulic pump 11, described liquid level liquid thermometer 8 and air filter 9 are all arranged on fuel tank 7, the filler opening of described oil hydraulic pump 11 is connected with fuel tank 7 by oil absorption filter 10, the oil outlet of described oil hydraulic pump 11 is connected with the oil inlet P of hydraulic control valve group 3 by one-way valve 12, described hydralic pressure gauge 2 is arranged at oil hydraulic pump 11 oil outlets of power pump station 1, for display system pressure, the oil outlet of described oil hydraulic pump 11 is connected with the first relief valve 13 of safety protection effect, the oil return inlet T 1 of described power pump station 1, T2 respectively with oil return inlet T and first oil hydraulic motor 51 of hydraulic control valve group 3, the return opening L of the second oil hydraulic motor 52 is connected, and the return opening of described power pump station 1 is connected with fuel tank 7 by return filter 14.
Described hydraulic control valve group 3 comprises a M type 3-position 4-way hand-operated direction valve 15, the second relief valve 16, the 3rd relief valve 17, hydraulicchange-over valve 18, Y type 3-position 4-way hand-operated direction valve 19, the 2nd M type 3-position 4-way hand-operated direction valve 20, two-position four-way hand-operated direction valve 21, Pilot operated check valve 22 and throttle valve 23, the filler opening of a described M type 3-position 4-way hand-operated direction valve 15 is connected with the oil outlet of power pump station 1, described Y type 3-position 4-way hand-operated direction valve 19 is connected with the filler opening A1 of plunger case 4 with throttle valve 23 by Pilot operated check valve 22, described the 2nd M type 3-position 4-way hand-operated direction valve 20 and two-position four-way hand-operated direction valve 21 respectively with the first oil hydraulic motor 51, the filler opening A2 of the second oil hydraulic motor 52, A3 and oil outlet B2, B3 is connected, and the filler opening of described hydraulicchange-over valve 18 is connected with the oil inlet P of hydraulic control valve group 3, two oil outlet A of described hydraulicchange-over valve 18, B connects respectively two the second relief valves 16 that system pressure is provided constraints and the 3rd relief valve 17, and the control port of described hydraulicchange-over valve 18 is connected with the filler opening of Pilot operated check valve 22.
The oil outlet of described power pump station 1 is connected with the oil inlet P of hydraulic control valve group 3, the oil inlet P of hydraulic control valve group 3 is connected with a hydraulic fluid port P for M type 3-position 4-way hand-operated direction valve 15 and the hydraulic fluid port P of hydraulicchange-over valve 18 respectively, the hydraulic fluid port A of the one M type 3-position 4-way hand-operated direction valve 15 is connected with the hydraulic fluid port P of Y type 3-position 4-way hand-operated direction valve 19, the hydraulic fluid port A of Y type 3-position 4-way hand-operated direction valve 19 is connected with the control port of hydraulicchange-over valve 18 with the filler opening of Pilot operated check valve 22 respectively, the hydraulic fluid port B of Y type 3-position 4-way hand-operated direction valve 19 is connected with the control port of Pilot operated check valve 22, the oil outlet of Pilot operated check valve 22 is connected with the filler opening of throttle valve 23, the oil outlet of throttle valve 23 is connected with the hydraulic fluid port A1 of plunger case 4, the hydraulic fluid port A of hydraulicchange-over valve 18 is connected with the filler opening of relief valve 17 with relief valve 16 respectively with hydraulic fluid port B, the oil outlet of relief valve 16 and relief valve 17 is through the hydraulic fluid port T of Y type 3-position 4-way hand-operated direction valve 19, the hydraulic fluid port T of the hydraulic fluid port T of M type 3-position 4-way hand-operated direction valve 20 and M type 3-position 4-way hand-operated direction valve 15 is connected with the oil outlet T of hydraulic control valve group 3, the hydraulic fluid port B of M type 3-position 4-way hand-operated direction valve 15 is connected with the hydraulic fluid port P of M type 3-position 4-way hand-operated direction valve 20, the hydraulic fluid port A of M type 3-position 4-way hand-operated direction valve 20 is connected with the filler opening A2 of the first oil hydraulic motor 51 and the hydraulic fluid port P of two-position four-way hand-operated direction valve 21 respectively, the oil outlet B2 of the first oil hydraulic motor 51 is connected with the hydraulic fluid port T of two-position four-way hand-operated direction valve 21, the hydraulic fluid port B of two-position four-way hand-operated direction valve 21 is connected with the oil outlet B3 of the second oil hydraulic motor 52 with the hydraulic fluid port B of M type 3-position 4-way hand-operated direction valve 20 respectively, the hydraulic fluid port A of two-position four-way hand-operated direction valve 21 is connected with the oil outlet A3 of the second oil hydraulic motor 52.
A described M type 3-position 4-way hand-operated direction valve 15 is when meta, and plunger case 4 and the first oil hydraulic motor 51, the second oil hydraulic motor 52 are all less than action; When a M type 3-position 4-way hand-operated direction valve 15 is switched to left position, when Y type 3-position 4-way hand-operated direction valve 19 is switched to left position, fluid enters plunger case 4 by Pilot operated check valve 22 and throttle valve 23, realize the extend action of plunger case 4, fluid enters the control port of hydraulicchange-over valve 18 simultaneously, hydraulicchange-over valve 18 is switched to right position, and system pressure is determined by the second relief valve 16 setting pressures; When a M type 3-position 4-way hand-operated direction valve 15 is switched to left position, when Y type 3-position 4-way hand-operated direction valve 19 is switched to right position, fluid enters the control port of Pilot operated check valve 22, Pilot operated check valve 22 is opened, fluid in plunger case 4 is got back to fuel tank 7 by throttle valve 23 and Pilot operated check valve 22, realizes the contractive action of plunger case 4; When a M type 3-position 4-way hand-operated direction valve 15 is switched to right position, by switching the 2nd M type 3-position 4-way hand-operated direction valve 20 and two-position four-way hand-operated direction valve 21, realize and drive fast and at a slow speed the switching of gear, hydraulicchange-over valve 18 is in initial position, and system pressure is determined by relief valve 17 setting pressures.
Described throttle valve 23, by regulating openings of sizes, can be realized the control to plunger case 4 stretching speed speeds.
Described the 2nd M type 3-position 4-way hand-operated direction valve 20 is switched to left position, and two-position four-way hand-operated direction valve 21 is when left position, and two oil hydraulic motors are connected, and driving gear is quick shelves; When the 2nd M type 3-position 4-way hand-operated direction valve 20 is switched to left position, when two-position four-way hand-operated direction valve 21 is switched to right position, two oil hydraulic motor parallel connections, drive gear at a slow speed grade.
Claims (3)
1. a manual steering hydraulic power tractor hydraulic control system, it is characterized in that: it comprises power pump station (1), hydraulic control valve group (3), plunger case (4) and oil hydraulic motor (5), the oil outlet of described power pump station (1) is connected with the filler opening of hydraulic control valve group (3), the return opening of described power pump station (1) respectively with return opening and first oil hydraulic motor (51) of hydraulic control valve group (3), the return opening of the second oil hydraulic motor (52) is connected, described hydraulic control valve group (3) comprises a M type 3-position 4-way hand-operated direction valve (15), the second relief valve (16), the 3rd relief valve (17), hydraulicchange-over valve (18), Y type 3-position 4-way hand-operated direction valve (19), the 2nd M type 3-position 4-way hand-operated direction valve (20), two-position four-way hand-operated direction valve (21), Pilot operated check valve (22) and throttle valve (23), a hydraulic fluid port of a described M type 3-position 4-way hand-operated direction valve (15) is connected with the oil outlet of power pump station (1), another two hydraulic fluid ports are connected with a hydraulic fluid port of the 2nd M type 3-position 4-way hand-operated direction valve (20) with Y type 3-position 4-way hand-operated direction valve (19) respectively, a hydraulic fluid port of described Y type 3-position 4-way hand-operated direction valve (19) is connected with the filler opening of Pilot operated check valve (22), the oil outlet of described Pilot operated check valve (22) is connected with the filler opening of plunger case (4) by throttle valve (23), another hydraulic fluid port of described Y type 3-position 4-way hand-operated direction valve (19) is connected with the control hydraulic fluid port of Pilot operated check valve (22), the filler opening of described hydraulicchange-over valve (18) is connected with the filler opening of hydraulic control valve group (3), two oil outlets of described hydraulicchange-over valve (18) connect respectively two the second relief valves (16) that system pressure is provided constraints and the 3rd relief valve (17), the oil outlet of described the second relief valve (16) and the 3rd relief valve (17) respectively with a described M type 3-position 4-way hand-operated direction valve (15), a hydraulic fluid port of the 2nd M type 3-position 4-way hand-operated direction valve (20) and Y type 3-position 4-way hand-operated direction valve (19) is connected, the control hydraulic fluid port of described hydraulicchange-over valve (18) is connected with the filler opening of Pilot operated check valve (22), a hydraulic fluid port of described the 2nd M type 3-position 4-way hand-operated direction valve (20) is connected with the filler opening of the first oil hydraulic motor (51) and a hydraulic fluid port of two-position four-way hand-operated direction valve (21) respectively, the oil outlet of described the first oil hydraulic motor (51) is connected with a hydraulic fluid port of two-position four-way hand-operated direction valve (21), another hydraulic fluid port of described two-position four-way hand-operated direction valve (21) is connected with the oil outlet of the second oil hydraulic motor (52) with a hydraulic fluid port of the 2nd M type 3-position 4-way hand-operated direction valve (20) respectively, a hydraulic fluid port of described two-position four-way hand-operated direction valve (21) is connected with the oil outlet of the second oil hydraulic motor (52).
2. a kind of manual steering hydraulic power tractor hydraulic control system according to claim 1, it is characterized in that: described power pump station (1) comprises motor (6), fuel tank (7), liquid level liquid thermometer (8), air filter (9), oil absorption filter (10), oil hydraulic pump (11), one-way valve (12) and return filter (14), the output terminal of described motor (6) is connected with oil hydraulic pump (11), described liquid level liquid thermometer (8) and air filter (9) are all arranged on fuel tank (7), the filler opening of described oil hydraulic pump (11) is connected with fuel tank (7) by oil absorption filter (10), the oil outlet of described oil hydraulic pump (11) is connected with the filler opening of hydraulic control valve group (3) by one-way valve (12), the return opening of described power pump station (1) is connected with fuel tank (7) by return filter (14).
3. a kind of manual steering hydraulic power tractor hydraulic control system according to claim 2, is characterized in that: the oil outlet of described oil hydraulic pump (11) is connected with first relief valve (13) of safety protection effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202222.1A CN103994216B (en) | 2014-05-14 | 2014-05-14 | Manual steering hydraulic power tractor hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202222.1A CN103994216B (en) | 2014-05-14 | 2014-05-14 | Manual steering hydraulic power tractor hydraulic control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103994216A true CN103994216A (en) | 2014-08-20 |
| CN103994216B CN103994216B (en) | 2016-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410202222.1A Expired - Fee Related CN103994216B (en) | 2014-05-14 | 2014-05-14 | Manual steering hydraulic power tractor hydraulic control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN103994216B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104627916A (en) * | 2015-02-01 | 2015-05-20 | 浙江大学 | Novel steel cable tension equalization equipment with adjustable tensioning force |
| CN105315030A (en) * | 2014-11-18 | 2016-02-10 | 刘建忠 | Hydraulic crawler-type turner |
| CN105545843A (en) * | 2016-02-14 | 2016-05-04 | 秦皇岛燕大一华机电工程技术研究院有限公司 | Hydraulic control system of self-propelled hydraulic power traction vehicle |
| CN106954401A (en) * | 2017-04-13 | 2017-07-18 | 农业部南京农业机械化研究所 | Manual self-navigation integral type crawler-type combine harvester steering |
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| DE2641926A1 (en) * | 1976-09-17 | 1978-03-23 | Weber Oelhydraulik | Driving cab hydraulic tipping system - has non-return valve relief feed connected by jet to fluid container during retraction (NL 21.3.78) |
| CN2823628Y (en) * | 2005-09-14 | 2006-10-04 | 刘建 | Electric manual dual-purpose hydraulic station |
| CN203333196U (en) * | 2013-07-05 | 2013-12-11 | 烟台大海机械制造有限公司 | Tower crane hydraulic jacking device |
| CN203516244U (en) * | 2013-08-02 | 2014-04-02 | 浙江工商职业技术学院 | Fast feed and working feed circuit |
| CN203880067U (en) * | 2014-05-14 | 2014-10-15 | 江苏海鹏特种车辆有限公司 | Hydraulic control system of manual-steering hydraulic power tractor |
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2014
- 2014-05-14 CN CN201410202222.1A patent/CN103994216B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2641926A1 (en) * | 1976-09-17 | 1978-03-23 | Weber Oelhydraulik | Driving cab hydraulic tipping system - has non-return valve relief feed connected by jet to fluid container during retraction (NL 21.3.78) |
| CN2823628Y (en) * | 2005-09-14 | 2006-10-04 | 刘建 | Electric manual dual-purpose hydraulic station |
| CN203333196U (en) * | 2013-07-05 | 2013-12-11 | 烟台大海机械制造有限公司 | Tower crane hydraulic jacking device |
| CN203516244U (en) * | 2013-08-02 | 2014-04-02 | 浙江工商职业技术学院 | Fast feed and working feed circuit |
| CN203880067U (en) * | 2014-05-14 | 2014-10-15 | 江苏海鹏特种车辆有限公司 | Hydraulic control system of manual-steering hydraulic power tractor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105315030A (en) * | 2014-11-18 | 2016-02-10 | 刘建忠 | Hydraulic crawler-type turner |
| CN105315030B (en) * | 2014-11-18 | 2019-05-31 | 保定市金甲农牧机械有限公司 | A kind of hydraulic crawler turning machine |
| CN104627916A (en) * | 2015-02-01 | 2015-05-20 | 浙江大学 | Novel steel cable tension equalization equipment with adjustable tensioning force |
| CN105545843A (en) * | 2016-02-14 | 2016-05-04 | 秦皇岛燕大一华机电工程技术研究院有限公司 | Hydraulic control system of self-propelled hydraulic power traction vehicle |
| CN106954401A (en) * | 2017-04-13 | 2017-07-18 | 农业部南京农业机械化研究所 | Manual self-navigation integral type crawler-type combine harvester steering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103994216B (en) | 2016-05-11 |
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