CN105883691A - Forklift hydraulic system with hydraulic power-assisted brake - Google Patents
Forklift hydraulic system with hydraulic power-assisted brake Download PDFInfo
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- CN105883691A CN105883691A CN201610483681.0A CN201610483681A CN105883691A CN 105883691 A CN105883691 A CN 105883691A CN 201610483681 A CN201610483681 A CN 201610483681A CN 105883691 A CN105883691 A CN 105883691A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
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Abstract
The invention discloses a forklift hydraulic system with hydraulic power-assisted brake. The forklift hydraulic system comprises a brake and a multi-way valve connected with an oil outlet end of a gear pump, wherein the multi-way valve is connected with an inclined oil cylinder and a hoisting oil cylinder respectively; a stable oil hole of the multi-way valve is connected with an oil inlet of a hydraulic power-assisted mechanism; a brake oil hole of the hydraulic power-assisted mechanism is connected with the brake; a flow splitting oil hole of the hydraulic power-assisted mechanism is connected with an oil inlet of a whole-hydraulic steering device; the whole-hydraulic steering device is connected with a steering oil cylinder. The hydraulic system only utilizes a pump source to realize a plurality of types of functions including the hydraulic power-assisted brake, whole-hydraulic steering, hoisting, inclining and the like of a forklift; the integration degree is relatively high, a pipeline is simple and energy of the system is saved; the hydraulic power-assisted brake is adopted so that the reaction is sensitive, the braking force is relatively small, the operation labor is saved and the working efficiency is high.
Description
Technical field
The present invention relates to forklift hydraulic system, be specifically related to the forklift hydraulic system of a kind of band hydraulic assisting brake.
Technical background
Brakes is fork truck safety traffic and is smoothed out the requisite device of operation, the quality of braking ability, directly influences the service efficiency of fork truck.The hydraulic system of current medium and small tonnage fork car and brakes are two kinds of independent systems, and both systems two kinds of different media of employing: hydraulic oil and brake fluid.The drum-type manual braking that brakes major part uses, mainly include the compositions such as brake pedal, manual braking's master cylinder, braking oilcan and brake, although this configuration simple in construction, but without power-assisted, brake pedal force is bigger, driver is harder when operation, causes that labor intensity is big, it is uncomfortable to operate.It addition, the elevating function of forklift hydraulic system fork truck to be realized, the turning function of fork truck to be realized.For the problems referred to above, need the forklift hydraulic system designing a kind of band hydraulic assisting brake to solve this problem, make it can not only meet the handling requirement of forklift hydraulic system, and the requirement of braking system with hydraulic assisting force and steering can also be met, i.e. realize fork truck handling, hydraulic assisting brake and hydro-steering function.
Summary of the invention
In order to solve the problems referred to above, the present invention provides the forklift hydraulic system of a kind of band hydraulic assisting brake, makes fork truck only realize hydraulic assisting brake, hydro-steering and the Multi Loading and Unloading Functions such as lifting, inclination with a pumping source.
A kind of forklift hydraulic system of band hydraulic assisting brake, including brake and the banked direction control valves that is connected with gear pump oil outlet end, described banked direction control valves is connected with dump ram, lift oil tank respectively, the stable hydraulic fluid port of described banked direction control valves is connected with the oil-in of hydraulic booster mechanism, the braking hydraulic fluid port of described hydraulic booster mechanism is connected with brake, the shunting hydraulic fluid port of hydraulic booster mechanism is connected with the oil-in of all-hydraulic steering gear, and described all-hydraulic steering gear connects steering cylinder.
Scheme further, described hydraulic booster mechanism includes the two-position three way flow sequence valve being connected with its oil-in, and two oil-outs of described two-position three way flow sequence valve are connected with shunting hydraulic fluid port, the two position three way directional control valve of hydraulic booster mechanism respectively；Described two position three way directional control valve is connected with power-assisted oil cylinder by ring shaped oil passage, and described power-assisted oil cylinder is connected with brake cylinder by piston rod；The shoe cream room of described brake cylinder is connected with the braking hydraulic fluid port of described hydraulic booster mechanism.
Further scheme, one end of described piston rod is connected with the brake piston being located in brake cylinder rod chamber, the other end is connected with the boosting piston in the oil back chamber being located at power-assisted oil cylinder；Described ring shaped oil passage is to connect the oil back chamber of power-assisted oil cylinder, rodless cavity and two position three way directional control valve.
Scheme, is linked together by connecting rod between described power-assisted oil cylinder and brake cylinder further.
Scheme further, is provided with oil outlet one-way valve in parallel and back pressure check valve between the shoe cream room of described brake cylinder and the braking hydraulic fluid port of described hydraulic booster mechanism.
Scheme further, the oil return opening of hydraulic booster mechanism and the oil return opening of all-hydraulic steering gear are all connected with hydraulic oil container by oil return threeway；Described oil return threeway is connected with described shoe cream room by unidirectional Fill valve and carries out repairing；Described oil back chamber is connected with oil return threeway.
Scheme further, the oil-in of described banked direction control valves connects stable shunt valve, the oil-out of described stable shunt valve is divided into two-way, and diffluence pass check valve of wherein leading up to is connected with the stable hydraulic fluid port of banked direction control valves, and another road is connected with lifting reversal valve, inclined reversing valve respectively；The oil-out of described lifting reversal valve is connected with the lifting hydraulic fluid port of banked direction control valves, and the lifting hydraulic fluid port of described banked direction control valves is connected with described lift oil tank by governor valve；Described inclined reversing valve is connected with dump ram.
Scheme further, described governor valve is made up of speed limit choke valve in parallel and speed limit check valve, and the oil inlet end of described lift oil tank is provided with explosion-proof valve.
It is sequentially provided with in the middle of scheme, described stable shunt valve and gear pump further and turns to relief valve and main safety valve；Between described stable shunt valve and lifting reversal valve, between stable shunt valve and inclined reversing valve, it is equipped with check valve；Described lifting reversal valve, inclined reversing valve are all connected with the oil return opening of banked direction control valves by oil return ring shaped oil passage.
The hydraulic system of the present invention shares a pumping source and realizes hydraulic assisting brake, hydro-steering, lifting and anteversion and retroversion action, and its detailed operation principle is as described below:
The hydraulic system of the present invention shares a pumping source and realizes hydraulic assisting brake, hydro-steering, lifting and anteversion and retroversion action.I.e. when gear pump starts, hydraulic oil in fuel tank is imported after oil absorption filter filters the oil-in of multi-way control valve, it is divided into two-way after the oil-feed ring shaped oil passage of multi-way control valve enters stable shunt valve, wherein road supply jacking system and a pitch system, another road is connected with the oil-in of hydraulic assisting brake mechanism by the stable hydraulic fluid port of multi-way control valve after shunting check valve, the most a part of hydraulic oil is in two-position three way flow sequence valve enters all-hydraulic steering gear, then flows back to be formed in hydraulic oil container loop through oil return opening, the oil return threeway of all-hydraulic steering gear.During brake oil-feed, the spool of two position three way directional control valve is in right position, hydraulic oil is imported in the rodless cavity of power-assisted oil cylinder by two position three way directional control valve, boosting piston, brake piston is promoted to be derived by the hydraulic oil in oil storage cylinder, import through its oil outlet one-way valve, the braking hydraulic fluid port of hydraulic booster mechanism brake is braked, complete hydraulic assisting brake；During oil return, the spool of two position three way directional control valve commutates to left position, hydraulic oil in brake returns and flows in hydraulic pressure servomechanism, in return check valve enters oil storage cylinder, promote brake piston, boosting piston that the hydraulic oil in the rodless cavity of power-assisted oil cylinder is derived under the effect of spring and hydraulic oil, become loop through ring shaped oil passage flow back fluid force feed box-shaped.Now return under return spring effect due to brake piston, form vacuum in oil storage cylinder, carry out repairing through the oil suction at oil return opening of unidirectional Fill valve to oil storage cylinder, complete hydraulic assisting brake oil return repairing.
When wanting hydro-steering, the spool of two-position three way flow sequence valve moves right, and hydraulic oil enters in all-hydraulic steering gear, forms loop with steering cylinder, and the oil return of steering cylinder is flowed back to hydraulic oil container, completed hydro-steering action.
When elevating movement, hydraulic oil enters in lifting reversal valve, connects with governor valve through multi-way control valve, subsequently into lift oil tank, thus completes the action that hoists；During oil return, lift oil tank declines under gravity, hydraulic oil enter through stop valve, governor valve multi-way control valve, lifting reversal valve, ring shaped oil passage, return oil filter and flow back to fuel tank, complete down maneuver.
When wanting banking motion, hydraulic oil enters in inclined reversing valve, then connect and form loop with rod chamber and the rodless cavity of dump ram through hypsokinesis hydraulic fluid port, the hydraulic fluid port that leans forward of multi-way control valve respectively.Hydraulic oil enters the rod chamber of dump ram, and the hydraulic oil in its rodless cavity flows back to hydraulic oil container through the hydraulic fluid port that leans forward, ring shaped oil passage, return oil filter, completes hypsokinesis action.Inclined reversing valve forwards left position to, and hydraulic oil enters the rodless cavity of dump ram, then the hydraulic oil of rod chamber flows back to hydraulic oil container through hypsokinesis hydraulic fluid port, ring shaped oil passage, return oil filter, completes forward swing.
So, the advantage that native system compared with prior art has following aspect
1, this hydraulic system is only with a pumping source, it is achieved that truck hydraulic power brake, hydro-steering and the Multi Loading and Unloading Functions such as lifting, inclination, and integration degree is higher, and pipeline is simple, energy saving of system；
2, this hydraulic system uses hydraulic assisting brake, is quick on the draw, and brake force is less, and operator is laborsaving, and labor intensity is little, and operation comfort adds preferably, and working performance is high；
3, being provided with check valve in the oil-feed oil duct of this hydraulic system, protecting against shock and anti-fluid flow backwards, and improve the better reliability of system；And use monostable flow divider, hydraulic assisting brake and hydro-steering constant flow, and working more reliable and more stable, noise is little.
Accompanying drawing explanation
Fig. 1 is present hydraulic system schematic diagram；
The schematic diagram of Tu2Shi hydraulic booster mechanism.
In figure: 1-steering cylinder, 2-all-hydraulic steering gear, 3-hydraulic booster mechanism, 3-1 oil outlet one-way valve, 3-2 back pressure check valve, 3-3 brake cylinder, 3-31 shoe cream room, 3-32 brake piston；The unidirectional Fill valve of 3-4,3-5 power-assisted oil cylinder, 3-51 oil back chamber, 3-52 boosting piston, 3-53 rodless cavity；3-6 two position three way directional control valve, 3-7 ring shaped oil passage, 3-8 two-position three way flow sequence valve, 3-9 connecting rod, 3-10 piston rod；4-hydraulic oil container, 5-gear pump, 6-oil-suction oil filter, 7-return oil filter, 8-multi-way control valve, 8-1 inclined reversing valve, 8-2 check valve, 8-3 lifts reversal valve, 8-4 stable shunt valve, 8-5 diffluence pass check valve, 8-6 turns to relief valve, 8-7 main safety valve, 8-8 oil return ring shaped oil passage；9-dump ram, 10-lift oil tank, 11-explosion-proof valve, 12-governor valve, 12-1 speed limit choke valve, 12-2 speed limit check valve；13-brake, 14-oil return threeway.
Detailed description of the invention
As shown in Figure 1, a kind of forklift hydraulic system of band hydraulic assisting brake, including brake 13 and the banked direction control valves 8 that is connected with gear pump 5 oil outlet end, described banked direction control valves 8 is connected with dump ram 9, lift oil tank 10 respectively, the stable hydraulic fluid port PF of described banked direction control valves 8 is connected with the oil inlet P 2 of hydraulic booster mechanism 3, the braking hydraulic fluid port Br1 of described hydraulic booster mechanism 3 is connected with brake 13, the shunting hydraulic fluid port N of hydraulic booster mechanism 3 is connected with the oil inlet P 3 of all-hydraulic steering gear 2, and described all-hydraulic steering gear 2 connects steering cylinder 1.
As in figure 2 it is shown, hydraulic booster mechanism 3 includes that the two-position three way flow sequence valve 3-8 being connected with its oil inlet P 2, two oil-outs of described two-position three way flow sequence valve 3-8 are connected with shunting hydraulic fluid port N, the two position three way directional control valve 3-6 of hydraulic booster mechanism 3 respectively；Described two position three way directional control valve 3-6 is connected with power-assisted oil cylinder 3-5 by ring shaped oil passage 3-7, and described power-assisted oil cylinder 3-5 is connected with brake cylinder 3-3 by piston rod 3-10；The shoe cream room 3-31 of described brake cylinder 3-3 is connected with the braking hydraulic fluid port Br1 of described hydraulic booster mechanism 3.
Further scheme, one end of described piston rod 3-10 is connected with the brake piston 3-32 being located in brake cylinder 3-3 rod chamber, the other end is connected with the boosting piston 3-52 in the oil back chamber 3-51 being located at power-assisted oil cylinder 3-5；Described ring shaped oil passage 3-7 is to connect the oil back chamber 3-51 of power-assisted oil cylinder 3-5, rodless cavity 3-53 and two position three way directional control valve 3-6.
Scheme, is linked together by connecting rod 3-9 between described power-assisted oil cylinder 3-5 and brake cylinder 3-3 further.
Scheme, is provided with oil outlet one-way valve 3-1 in parallel and back pressure check valve 3-2 between the shoe cream room 3-31 of described brake cylinder 3-3 and the braking hydraulic fluid port Br1 of described hydraulic booster mechanism 3 further.
Scheme further, the oil return inlet T 2 of hydraulic booster mechanism 3 and the oil return inlet T 3 of all-hydraulic steering gear 2 are all connected with hydraulic oil container 4 by oil return threeway 14；Described oil return threeway 14 is connected with described shoe cream room 3-31 by unidirectional Fill valve 3-4 and carries out repairing；Described oil back chamber 3-51 is connected with oil return threeway 14.
Scheme further, the oil inlet P 1 of described banked direction control valves 8 connects stable shunt valve 8-4, the oil-out of described stable shunt valve 8-4 is divided into two-way, diffluence pass check valve 8-5 of wherein leading up to is connected with the stable hydraulic fluid port PF of banked direction control valves 8, and another road is connected with lifting reversal valve 8-3, inclined reversing valve 8-1 respectively；The oil-out of described lifting reversal valve 8-3 is connected with the lifting hydraulic fluid port A1 of banked direction control valves 8, and the lifting hydraulic fluid port A1 of described banked direction control valves 8 is connected with described lift oil tank 10 by governor valve 12；Described inclined reversing valve 8-1 is connected with dump ram 9.
Scheme further, described governor valve 12 is made up of speed limit choke valve 12-1 in parallel and speed limit check valve 12-2, and the oil inlet end of described lift oil tank 10 is provided with explosion-proof valve 11.
Scheme further, be sequentially provided with middle with gear pump 5 of described stable shunt valve 8-4 turns to relief valve 8-6 and main safety valve 8-7；Between described stable shunt valve 8-4 and lifting reversal valve 8-3, between stable shunt valve 8-4 and inclined reversing valve 8-1, it is equipped with check valve 8-2；Described lifting reversal valve 8-3, inclined reversing valve 8-1 are all connected with the oil return inlet T 1 of banked direction control valves 8 by oil return ring shaped oil passage 8-8.
The hydraulic system of the present invention shares a pumping source and realizes hydraulic assisting brake, hydro-steering, lifting and anteversion and retroversion action.I.e. when gear pump 5 starts, hydraulic oil in fuel tank 4 is imported after oil absorption filter 6 filters the oil inlet P 1 of multi-way control valve 8, it is divided into two-way after the oil-feed ring shaped oil passage of multi-way control valve 8 enters stable shunt valve 8-4, a wherein road supply lifting reversal valve 8-3 and inclined reversing valve 8-1, another road is connected with the oil inlet P 2 of hydraulic assisting brake mechanism 3 by the stable hydraulic fluid port PF of multi-way control valve 8 through shunting check valve 8-5.Its detailed operation principle is as follows:
1, hydraulic assisting brake
During brakeless, the spool of two-position three way flow sequence valve 3-8 moves right, its two oil-out connects with shunting hydraulic fluid port N, two position three way directional control valve 3-6 respectively, a portion hydraulic oil enters in all-hydraulic steering gear 2 through shunting hydraulic fluid port N, the oil inlet P 3 of all-hydraulic steering gear 2 of hydraulic booster mechanism 3, then flows back to hydraulic oil container 4 through oil return inlet T 3, the oil return threeway 14 of all-hydraulic steering gear 2.When the spool of two position three way directional control valve 3-6 is in right position, hydraulic oil is imported in the rodless cavity 3-53 of power-assisted oil cylinder 3-5 by two position three way directional control valve 3-6, boosting piston 3-52 is promoted to move to brake cylinder 3-3 direction, thus the hydraulic oil in oil storage cylinder 3-31 is derived by the brake piston 3-32 in brake cylinder 3-3, import through oil outlet one-way valve 3-1, the braking hydraulic fluid port Br1 of hydraulic booster mechanism 3 brake 13 is braked, complete hydraulic assisting brake；When the spool of two position three way directional control valve 3-6 commutates to left position, hydraulic oil in brake 13 returns the braking hydraulic fluid port Br1 flowing into hydraulic pressure servomechanism 3, push return check valve 3-2 open and enter in oil storage cylinder 3-31, brake piston 3-32 is promoted to move to power-assisted oil cylinder 3-5 direction under the effect of spring and hydraulic oil, in power-assisted oil cylinder 3-5, boosting piston 3-52 derives the hydraulic oil in rodless cavity 3-53, the a3 of two position three way directional control valve 3-6 is entered through the oil-out a2 of rodless cavity 3-53 through ring shaped oil passage 3-7(i.e. hydraulic oil, b2 port, enter back into the oil-in b3 of oil back chamber 3-51), last from the oil return inlet T 5 of oil back chamber 3-51, the oil return inlet T 2 of hydraulic booster mechanism 3, oil return threeway 14 and flow back to hydraulic oil container 4.Owing to brake piston 3-32 returns under return spring effect, form vacuum in making oil storage cylinder 3-31, carry out repairing through unidirectional Fill valve 3-4 oil suction at oil return inlet T 2 to oil storage cylinder 3-31, complete hydraulic assisting brake oil return repairing.
2, hydro-steering
The spool of two-position three way flow sequence valve 3-8 moves right, its two oil-out connects with shunting hydraulic fluid port N, two position three way directional control valve 3-6 respectively, a portion hydraulic oil enters in all-hydraulic steering gear 2 through shunting hydraulic fluid port N, the oil inlet P 3 of all-hydraulic steering gear 2 of hydraulic booster mechanism 3, loop is formed with steering cylinder 1 through its left steering hydraulic fluid port L, right turn hydraulic fluid port R, the oil return of steering cylinder 1 flows back to hydraulic oil container 4 through oil return inlet T 3, the oil return threeway 14 of all-hydraulic steering gear 2, completes hydro-steering action.
3, jacking system
Hydraulic oil enters in lifting reversal valve 8-3, now the spool of lifting reversal valve 8-3 is in right position, and hydraulic oil enters lifting reversal valve 8-3 through check valve 8-2, connects with governor valve 12 through the lifting hydraulic fluid port A1 of multi-way control valve 8, subsequently into lift oil tank 10, thus complete the action that hoists；When the spool of lifting reversal valve 8-3 is in left position, lift oil tank 10 declines under gravity, hydraulic oil enters the lifting hydraulic fluid port A1 of multi-way control valve 8 through stop valve 11, governor valve 12, flow back to fuel tank 4 by lifting reversal valve 8-3, ring shaped oil passage 8-8, the oil return inlet T 1 of multi-way control valve 8, return oil filter 7, complete down maneuver.
4, pitch system
Hydraulic oil enters in inclined reversing valve 8-1, when inclined reversing valve 8-1 is in right position, hydraulic oil is opened check valve 8-2 and is entered in inclined reversing valve 8-1, then connects formation loop with rod chamber and the rodless cavity of dump ram 9 respectively through hypsokinesis hydraulic fluid port A2, the hydraulic fluid port B2 that leans forward of multi-way control valve 8.Hydraulic oil enters the rod chamber of dump ram 9, and the hydraulic oil in its rodless cavity flows back to hydraulic oil container 4 through the hydraulic fluid port B2 that leans forward, ring shaped oil passage 8-8, the oil return inlet T 1 of multi-way control valve, return oil filter 7, completes hypsokinesis action.
When inclined reversing valve 8-1 is in left position, hydraulic oil is opened check valve 8-2 and is entered in inclined reversing valve 8-1, then connects formation loop with rod chamber and the rodless cavity of dump ram 9 respectively through hypsokinesis hydraulic fluid port A2, the hydraulic fluid port B2 that leans forward of multi-way control valve 8.Hydraulic oil enters the rodless cavity of dump ram 9, then the hydraulic oil of rod chamber flows back to hydraulic oil container 4 through hypsokinesis hydraulic fluid port A2, ring shaped oil passage 8-8, the oil return inlet T 1 of multi-way control valve, return oil filter 7, completes forward swing.
Above example is not limited only to protection scope of the present invention, all basic thoughts based on the present invention and modify or change broadly fall into protection scope of the present invention.
Claims (9)
1. the forklift hydraulic system of a band hydraulic assisting brake, including brake (13) and the banked direction control valves (8) that is connected with gear pump (5) oil outlet end, described banked direction control valves (8) respectively with dump ram (9), lift oil tank (10) connects, it is characterized in that: the stable hydraulic fluid port of described banked direction control valves (8) is connected with the oil-in of hydraulic booster mechanism (3), the braking hydraulic fluid port of described hydraulic booster mechanism (3) is connected with brake (13), the shunting hydraulic fluid port of hydraulic booster mechanism (3) is connected with the oil-in of all-hydraulic steering gear (2), described all-hydraulic steering gear (2) connects steering cylinder (1).
The forklift hydraulic system of a kind of band hydraulic assisting brake the most according to claim 1, it is characterized in that: described hydraulic booster mechanism (3) includes the two-position three way flow sequence valve (3-8) being connected with its oil-in, two oil-outs of described two-position three way flow sequence valve (3-8) are connected with shunting hydraulic fluid port, the two position three way directional control valve (3-6) of hydraulic booster mechanism (3) respectively；Described two position three way directional control valve (3-6) is connected with power-assisted oil cylinder (3-5) by ring shaped oil passage (3-7), and described power-assisted oil cylinder (3-5) is connected with brake cylinder (3-3) by piston rod (3-10)；The shoe cream room (3-31) of described brake cylinder (3-3) is connected with the braking hydraulic fluid port of described hydraulic booster mechanism (3).
The forklift hydraulic system of a kind of band hydraulic assisting brake the most according to claim 2, it is characterised in that: one end of described piston rod (3-10) is connected with the brake piston (3-32) being located in brake cylinder (3-3) rod chamber, the other end is connected with the boosting piston (3-52) in the oil back chamber (3-51) being located at power-assisted oil cylinder (3-5)；Described ring shaped oil passage (3-7) is oil back chamber (3-51), rodless cavity (3-53) and the two position three way directional control valve (3-6) connecting power-assisted oil cylinder (3-5).
The buffer-type respiration filtering device of a kind of hydraulic oil container the most according to claim 2, it is characterised in that: linked together by connecting rod (3-9) between described power-assisted oil cylinder (3-5) and brake cylinder (3-3).
The forklift hydraulic system of a kind of band hydraulic assisting brake the most according to claim 2, it is characterised in that: it is provided with oil outlet one-way valve (3-1) in parallel and back pressure check valve (3-2) between the shoe cream room (3-31) of described brake cylinder (3-3) and the braking hydraulic fluid port of described hydraulic booster mechanism (3).
The forklift hydraulic system of a kind of band hydraulic assisting brake the most according to claim 3, it is characterised in that: the oil return opening of described hydraulic booster mechanism (3) and the oil return opening of all-hydraulic steering gear (2) are all connected with hydraulic oil container (4) by oil return threeway (14)；Described oil return threeway (14) is connected with described shoe cream room (3-31) by unidirectional Fill valve (3-4) and carries out repairing；Described oil back chamber (3-51) is connected with oil return threeway (14).
The forklift hydraulic system of a kind of band hydraulic assisting brake the most according to claim 1, it is characterized in that: the oil-in of described banked direction control valves (8) connects stable shunt valve (8-4), the oil-out of described stable shunt valve (8-4) is divided into two-way, diffluence pass check valve (8-5) of wherein leading up to is connected with the stable hydraulic fluid port of banked direction control valves (8), and another road is connected with lifting reversal valve (8-3), inclined reversing valve (8-1) respectively；The oil-out of described lifting reversal valve (8-3) is connected with the lifting hydraulic fluid port of banked direction control valves (8), and the lifting hydraulic fluid port (A1) of described banked direction control valves (8) is connected with described lift oil tank (10) by governor valve (12)；Described inclined reversing valve (8-1) is connected with dump ram (9).
The forklift hydraulic system of a kind of band hydraulic assisting brake the most according to claim 7, it is characterized in that: described governor valve (12) is made up of speed limit choke valve (12-1) in parallel and speed limit check valve (12-2), and the oil inlet end of described lift oil tank (10) is provided with explosion-proof valve (11).
The forklift hydraulic system of a kind of band hydraulic assisting brake the most according to claim 1, it is characterised in that: be sequentially provided with middle with gear pump (5) of described stable shunt valve (8-4) turns to relief valve (8-6) and main safety valve (8-7)；Between described stable shunt valve (8-4) and lifting reversal valve (8-3), between stable shunt valve (8-4) and inclined reversing valve (8-1), it is equipped with check valve (8-2)；Described lifting reversal valve (8-3), inclined reversing valve (8-1) are all connected by the oil return opening of oil return ring shaped oil passage (8-8) with banked direction control valves (8).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026867A (en) * | 2018-09-25 | 2018-12-18 | 杭叉集团股份有限公司 | The energy-saving hydraulic system of large-tonnage storage battery forktruck |
| CN111120433A (en) * | 2018-10-31 | 2020-05-08 | 比亚迪股份有限公司 | Electric forklift and hydraulic system thereof |
| CN113803306A (en) * | 2021-08-31 | 2021-12-17 | 常州常发重工科技有限公司 | Paddy field working vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3964262A (en) * | 1975-06-10 | 1976-06-22 | Clark Equipment Company | Hydrostatic transmission control system |
| JPS5357624A (en) * | 1976-11-04 | 1978-05-25 | Komatsu Forklift Kk | Safety device for cargo vehicle |
| CN101767579A (en) * | 2008-12-12 | 2010-07-07 | 宁波安捷制动器有限公司 | Hydraulic power-assisted brake device |
| CN201545673U (en) * | 2009-11-19 | 2010-08-11 | 浙江杭叉工程机械集团股份有限公司 | Hydraulic system for forklift |
| CN101875350A (en) * | 2009-04-30 | 2010-11-03 | 宁波安捷制动器有限公司 | Hydraulic booster valve |
| CN205907000U (en) * | 2016-06-28 | 2017-01-25 | 安徽合力股份有限公司 | Take hydraulic system of forklift of hydraulic pressure helping hand braking |
-
2016
- 2016-06-28 CN CN201610483681.0A patent/CN105883691B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3964262A (en) * | 1975-06-10 | 1976-06-22 | Clark Equipment Company | Hydrostatic transmission control system |
| JPS5357624A (en) * | 1976-11-04 | 1978-05-25 | Komatsu Forklift Kk | Safety device for cargo vehicle |
| CN101767579A (en) * | 2008-12-12 | 2010-07-07 | 宁波安捷制动器有限公司 | Hydraulic power-assisted brake device |
| CN101875350A (en) * | 2009-04-30 | 2010-11-03 | 宁波安捷制动器有限公司 | Hydraulic booster valve |
| CN201545673U (en) * | 2009-11-19 | 2010-08-11 | 浙江杭叉工程机械集团股份有限公司 | Hydraulic system for forklift |
| CN205907000U (en) * | 2016-06-28 | 2017-01-25 | 安徽合力股份有限公司 | Take hydraulic system of forklift of hydraulic pressure helping hand braking |
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| CN111120433A (en) * | 2018-10-31 | 2020-05-08 | 比亚迪股份有限公司 | Electric forklift and hydraulic system thereof |
| CN111120433B (en) * | 2018-10-31 | 2021-09-03 | 比亚迪股份有限公司 | Electric forklift and hydraulic system thereof |
| CN113803306A (en) * | 2021-08-31 | 2021-12-17 | 常州常发重工科技有限公司 | Paddy field working vehicle |
| CN113803306B (en) * | 2021-08-31 | 2023-11-17 | 常州常发重工科技有限公司 | Paddy field operation vehicle |
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