CN201240373Y - Parking brake hydraulic system for forklift - Google Patents
Parking brake hydraulic system for forklift Download PDFInfo
- Publication number
- CN201240373Y CN201240373Y CNU2008200391289U CN200820039128U CN201240373Y CN 201240373 Y CN201240373 Y CN 201240373Y CN U2008200391289 U CNU2008200391289 U CN U2008200391289U CN 200820039128 U CN200820039128 U CN 200820039128U CN 201240373 Y CN201240373 Y CN 201240373Y
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- oil
- stopping brake
- brake
- control valve
- load sensing
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- Expired - Lifetime
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- Braking Systems And Boosters (AREA)
Abstract
The utility model relates to a stopping brake hydraulic system for a fork truck, which solves the oil pressure source problem of the stopping brake system of a wet brake. The stopping brake hydraulic system comprises a stopping brake, a load sensing pressure-gradient control valve and a main oil pump. The load sensing pressure-gradient control valve is connected on an oil outlet pipeline of the main oil pump in series, and the stopping brake is a wet brake. The load sensing pressure-gradient control valve communicates with the end of a turning oil way and is connected with a stopping brake oil pipe via a three-way pipe, the other end of the stopping brake oil pipe communicates with the oil inlet of the stopping brake, and a solenoid valve is connected on the stopping brake oil pipe in series. The stopping brake hydraulic system broadens the functions of the load sensing pressure-gradient control valve, and solves the oil pressure source problem of the full-hydraulic stopping brake, so that the operating hydraulic system and the brake system of the fork truck are integrated. The stopping brake hydraulic system simplifies pipe system, and reduces the development cost of the entire fork truck; and adopts hydraulic pressure control, resulting in rapid and stable release of stopping brake.
Description
Technical field
The utility model relates to fork truck stopping brake hydraulic efficiency pressure system.
Background technology
At present, domestic little tonnage fork truck driving and stopping brake generally adopt shoe plate formula drg, and two cover braking drive organs are arranged usually, are respectively foot brakes and hand braking.Though this brake mode is simple in structure, handle effort, and gap and often adjustment of braking force, insensitivity is poor.Along with the requirement of construction machinery and equipment to deceleration and stopping performance improves constantly, (insensitivity is good, handles lightly, does not need the adjusting play, and is safe because of its unique advantages for the novel multifunctional oil-immersed multi-disk brake.) be applied on the fork truck just more and more.Service brake is controlled by two different oil circuits of oil pressure respectively with stopping brake.The service brake required pressure is higher, and present little tonnage fork truck utilizes the flow divider valve on the multiway valve and realizes that by the steering maneuver brake activation valve stopping brake required pressure is lower, need an independent oil sources and come fuel feeding.And little tonnage fork truck has restricted the quantity of oil pump, so can't satisfy the requirement of parking brake system oil sources because be subjected to the restriction of change speed gear box or driving engine (motor) PT0 mouth quantity.Only on existing Hydraulic Elements, look for way to solve stopping brake oil pressure source problem.
Summary of the invention
In order to solve the problem of oil-immersed multi-disk brake parking brake system oil pressure source, it is the fork truck stopping brake hydraulic efficiency pressure system of oil sources with fork truck master oil sources that the utility model provides a kind of.
The technical solution that realizes the foregoing invention purpose is as follows:
Fork truck stopping brake hydraulic efficiency pressure system comprises parking brake, load sensing pressure-gradient control valve and main oil pump, and the load sensing pressure-gradient control valve is connected on the fuel-displaced pipeline of main oil pump, and described parking brake is an oil-immersed multi-disk brake;
Described load sensing pressure-gradient control valve connection turns to the port of oil circuit connecting the stopping brake oil pipe by three-way pipe, and the other end of stopping brake oil pipe is being communicated with the parking brake oil inlet, the electromagnetic valve of connecting on the described stopping brake oil pipe.Electromagnetic valve gets electric, and stopping brake is removed, and electromagnetic valve must not be electric, is the stopping brake state.
The utility model is because of the particularity of load sensing pressure-gradient control valve 1 and the load sensing deflector structure that matches with it, make the hydraulic oil that comes out from the CF mouth during at meta when the load sensing deflector can produce a minimum control presssure, see Fig. 1, and this pressure is for the difference of same specification pressure-gradient control valve with controlling spring, the pressure size is also different, generally between 0.8-3Mpa, can satisfy the required pressure requirement of stopping brake.So the utility model can make the CF mouth obtain different control presssures by adjusting load sensing pressure-gradient control valve 1 controlling spring, satisfies the pressure requirement of different braking system.
Useful technique effect of the present utility model is embodied in following several aspect:
1, for little tonnage fork truck wet braking provides effective solution, make fork truck hydraulic system of working and brake system become an organic whole;
2, expand the functions of use of load sensing pressure-gradient control valve, solved all-hydraulic stopping brake oil sources problem, simplified pipeline system, reduced the cost of development of complete machine;
3, adopt hydraulic coupling control, make stopping brake remove rapidly, steadily;
4, adopt electric automatic control, handle accurately, convenient, comfortable.
Description of drawings
Fig. 1 is the utility model structure diagram,
Fig. 2 is an oil-immersed multi-disk brake semi-sictional view enlarged drawing.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described by embodiment.
Embodiment:
Referring to Fig. 1, fork truck stopping brake hydraulic efficiency pressure system comprises parking brake 5, load sensing pressure-gradient control valve 1 and main oil pump, and load sensing pressure-gradient control valve 1 is connected on the fuel-displaced pipeline of main oil pump, and parking brake 5 is an oil-immersed multi-disk brake;
1 connection of load sensing pressure-gradient control valve turns to the CF port of oil circuit connecting stopping brake oil pipe 3 by three-way pipe, and the other end of stopping brake oil pipe 3 is being communicated with parking brake 5 oil inlets, the electromagnetic valve 4 of connecting on the stopping brake oil pipe 3.
The basic functional principle of fork truck hydraulic efficiency pressure system is: the pressure oil that comes out from main pump is divided into two parts through load sensing pressure-gradient control valve 1, and a part is preferentially assigned to the steering swivel system 2 of fork truck from the CF mouth of load sensing pressure-gradient control valve 1, the turning to of control car body; Another part is dispensed to fork truck equipment to fork truck working connection system 6 by multiway valve from the EF mouth of load sensing pressure-gradient control valve 1, with the lifting and the inclination of control door frame.The basic functional principle of fork truck hydraulic efficiency pressure system of the present utility model is except satisfying above-mentioned job requirement, and the control presssure oil that has increased the CF mouth that utilizes load sensing pressure-gradient control valve 1 provides the function of pressure oil-source for parking brake 5.Just the pressure oil that comes out from the CF mouth of load sensing pressure-gradient control valve 1 not only supplies steering swivel system, gives parking brake 5 by electromagnetic valve 4 fuel feeding simultaneously, satisfies fork truck and removes the required pressure oil requirement of stopping brake.
Vehicle is not when starting, and electromagnetic valve 4 must not be electric, and oil pocket 9 is seen Fig. 2 in the parking brake 5, communicates by electromagnetic valve 4 and fuel tank, and stopping brake power is added in load on the piston 8 by compression spring 7, and pressing friction sheet 10 produces friction resistance moment and forms.Be the stopping brake state this moment.
When vehicle launch, electromagnetic valve 4.The hydraulic oil that comes out from main pump comes out through the CF of load sensing pressure-gradient control valve 1 mouth, enters by electromagnetic valve 4 in the oil pocket 9 of parking brake 5, and pressure oil promotes piston 8, and holddown spring 7 allows friction lining 10 throw off, the braking force that release spring loads, and stopping brake is removed.
Claims (1)
1, fork truck stopping brake hydraulic efficiency pressure system comprises parking brake, load sensing pressure-gradient control valve and main oil pump, and the load sensing pressure-gradient control valve is connected on the fuel-displaced pipeline of main oil pump, and described parking brake is an oil-immersed multi-disk brake, it is characterized in that:
Described load sensing pressure-gradient control valve connection turns to the port of oil circuit connecting the stopping brake oil pipe by three-way pipe, and the other end of stopping brake oil pipe is being communicated with the parking brake oil inlet, the electromagnetic valve of connecting on the described stopping brake oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200391289U CN201240373Y (en) | 2008-07-24 | 2008-07-24 | Parking brake hydraulic system for forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200391289U CN201240373Y (en) | 2008-07-24 | 2008-07-24 | Parking brake hydraulic system for forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201240373Y true CN201240373Y (en) | 2009-05-20 |
Family
ID=40713663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200391289U Expired - Lifetime CN201240373Y (en) | 2008-07-24 | 2008-07-24 | Parking brake hydraulic system for forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201240373Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102114833A (en) * | 2009-12-31 | 2011-07-06 | 中国神华能源股份有限公司 | Hydraulic control system for brakes |
| CN102501843A (en) * | 2011-11-07 | 2012-06-20 | 中国煤炭科工集团太原研究院 | Brake device of fully-hydraulic-driven two-way driving trackless rubber-tyred vehicle |
| CN102632883A (en) * | 2012-05-04 | 2012-08-15 | 东风汽车有限公司 | Electromagnetic valve for hill start of AMT vehicle |
| CN103085737A (en) * | 2011-11-08 | 2013-05-08 | 浙江尤恩叉车股份有限公司 | Safe and intelligent operation system of forklifts |
| CN104670196A (en) * | 2013-11-29 | 2015-06-03 | 比亚迪股份有限公司 | Parking brake system for forklift and forklift with parking brake system |
| WO2015078334A1 (en) * | 2013-11-29 | 2015-06-04 | Byd Company Limited | Parking brake system for forklift and forklift having the same |
-
2008
- 2008-07-24 CN CNU2008200391289U patent/CN201240373Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102114833A (en) * | 2009-12-31 | 2011-07-06 | 中国神华能源股份有限公司 | Hydraulic control system for brakes |
| CN102114833B (en) * | 2009-12-31 | 2015-10-21 | 中国神华能源股份有限公司 | Drg is carried out to the system of fluid control |
| CN102501843A (en) * | 2011-11-07 | 2012-06-20 | 中国煤炭科工集团太原研究院 | Brake device of fully-hydraulic-driven two-way driving trackless rubber-tyred vehicle |
| CN103085737A (en) * | 2011-11-08 | 2013-05-08 | 浙江尤恩叉车股份有限公司 | Safe and intelligent operation system of forklifts |
| CN102632883A (en) * | 2012-05-04 | 2012-08-15 | 东风汽车有限公司 | Electromagnetic valve for hill start of AMT vehicle |
| CN102632883B (en) * | 2012-05-04 | 2014-05-21 | 东风汽车公司 | Solenoid valve for hill start of AMT (automated mechanical transmission) vehicle |
| CN104670196A (en) * | 2013-11-29 | 2015-06-03 | 比亚迪股份有限公司 | Parking brake system for forklift and forklift with parking brake system |
| WO2015078334A1 (en) * | 2013-11-29 | 2015-06-04 | Byd Company Limited | Parking brake system for forklift and forklift having the same |
| CN104670196B (en) * | 2013-11-29 | 2018-03-30 | 比亚迪股份有限公司 | For fork truck parking brake system and there is its fork truck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090520 |
|
| CX01 | Expiry of patent term |