CN104129373B - A kind of fork truck heat dissipation type brakes - Google Patents
A kind of fork truck heat dissipation type brakes Download PDFInfo
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- CN104129373B CN104129373B CN201410367471.6A CN201410367471A CN104129373B CN 104129373 B CN104129373 B CN 104129373B CN 201410367471 A CN201410367471 A CN 201410367471A CN 104129373 B CN104129373 B CN 104129373B
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Abstract
The present invention provides a kind of fork truck heat dissipation type brakes, including left wet brake, right wet brake and the oil pump being connected with fuel tank, the oil outlet end of described oil pump oil-in with energy storage equipment, four five-way brake valves respectively is connected, and the brake port of described four five-way brake valves brake port with left wet brake, right wet brake respectively is connected；The unloading port of described four five-way brake valves passes through the radiator oil-in respectively with left wet brake, right wet brake and is connected；The urgent oil-in of described energy storage equipment and four five-way brake valves connects.The present invention realizes dispelling the heat fluid in brakes by four five-way brake valves and energy storage equipment, reduces the rising of system oil temperature, is conducive to improving car load service behaviour.And when oil pump quits work or damages, brake hard can be realized.
Description
Technical field
The present invention relates to brake system of forklift, be specifically related to a kind of fork truck heat dissipation type brakes.
Background technology
Brakes is fork truck safety traffic and is smoothed out the requisite device of operation, and braking ability
Performance directly influences the service efficiency of fork truck.Full hydraulic power brake is relatively broad employing in current engineering machinery at present
New technique, it can obtain, with less pedal force, the braking moment needed, thus alleviate the labor intensity of operator, improve
The operation comfortableness of car load, and braking time and braking distance shorter than non-powered braking.
At present, 5～10 ton forklift brakes are fluid pressure type drive mechanisms, and its major part uses disc type or shoe type system
Dynamic device；Brakes is mainly made up of brake pedal, gear pump, brake valve, spring accumul ator and brake etc..But this system
Dynamic system is difficult to meet the requirement of wet brake, and this is owing to wet brake belongs to the braking model of clutch type, its system
Substantial amounts of heat can be produced time dynamic, and cause system hydraulic fluid temperature to raise quickly, need hydraulic oil carries out the recirculation that dispels the heat
Use.What now domestic and international wet brake was used on 5～10 ton forklifts is fewer, this is because 5～10 ton forklifts are by himself
Limit, the oil sources problem of cooling system cannot be solved；It addition, 5～10 ton forklifts to commonly use spring accumul ator capacity little, very
The requirement that difficult satisfied 5～10 ton forklift wet brakes are braked when oil pump quits work (because of engine misses) or damages.Institute
With for the problems referred to above, need to design a kind of 5～10 ton forklift novel braking systems with cooling mechanism.
Summary of the invention
The present invention is to solve above-mentioned technical problem, it is provided that a kind of fork truck heat dissipation type brakes, it is achieved braking same
Time hydraulic oil is cooled down, and brakes is carried out safeguard protection.
The technical scheme is that a kind of fork truck heat dissipation type brakes, including left wet brake, right wet type system
Dynamic device and the oil pump being connected with fuel tank, the oil outlet end of described oil pump respectively with energy storage equipment, the oil-feed of four five-way brake valves
Mouthful connecting, the brake port of described four five-way brake valves brake port with left wet brake, right wet brake respectively is connected；
The unloading port of described four five-way brake valves passes through the radiator oil-in respectively with left wet brake, right wet brake and connects
Connect；The urgent oil-in of described energy storage equipment and four five-way brake valves connects.
Further, described energy storage equipment includes bladder type hydropneumatic accumulator, and the oil-in of described bladder type hydropneumatic accumulator is unidirectional by first
Valve is connected with the oil outlet end of oil pump；It is connected between outlet and the bladder type hydropneumatic accumulator of described first check valve and has relief valve and low pressure report
Alert switch.
Further, described oil pump be connected to oil absorption filter, cleaner into and out of hydraulic fluid port.
Further, between unloading port and the radiator of described four five-way brake valves, it is provided with the second check valve, described second
The oil outlet end of check valve is connected with fuel tank.
Further, described left wet brake, the oil-out of right wet brake are all connected with fuel tank by return filter
Connect.
The present invention is by four novel five-way brake valves and energy storage equipment and existing brake pedal, oil pump, wet type system
Dynamic device etc. constitutes a kind of brakes being applicable to 5～10 ton forklifts and having heat sinking function, and it can not only meet 5～10
Ton forklift wet braking performance requirement, moreover it is possible to make braking and cooling system share an oil pump and an oil sources, can not only realize
Braking, moreover it is possible to realize the fluid to hydraulic system and dispel the heat, i.e. fluid are diverted to radiator by brake valve and dispel the heat, and reduce system
The rising of system oil temperature, is conducive to improving car load service behaviour.
In the present invention four five-way brake valves be provided with oil-in, unloading port, brake port, urgent oil-in and oil return opening this five
Individual hydraulic fluid port, it is possible to realize the functions such as braking, topping up, cooling and off-load；And by operating the valve rod of four five-way brake valves, with regard to energy
Realize three duties of four five-way brake valves: free state, on-position and emergency braking condition.
Second check valve is as heat radiation fluid bypass leakage passage, it is achieved the safety of wet brake left and right to wet type is protected
The effect protected, i.e. when cooling oil back pressure is more than 0.05MPa, fluid is opened the second check valve and fluid off-load is fallen, and returns to
In hydraulic oil container, thus realize right wet brake and the protective effect of left wet brake.
Fluid is imported radiator and dispels the heat by the unloading port of four five-way brake valves, then is led respectively by the fluid after cooling
Enter in left and right wet brake and it is cooled down, and heat is brought back to by the oil-out of left and right wet brake by fluid
In fuel tank, thus carry out forcing cooling heat radiation to left and right wet brake by the fluid after radiator cools down, protect and set
Standby normal work.
When oil pump quits work (because of engine misses) or damages, due to the oil-in no pressure of four five-way brake valves
And when cannot realize normal brake application, the fluid of bladder type hydropneumatic accumulator storage imports four through the urgent oil-in of four five-way brake valves
Five-way brake valve also realizes brake hard from its brake port left and right wet brake of entrance.It addition, at bladder type hydropneumatic accumulator
In-line is provided with low pressure warning switch and relief valve, i.e. when in bladder type hydropneumatic accumulator, pressure is less than when setting minimum pressure, low
Pressure alarm switch sends chimes of doom, reminds human pilot to carry out to bladder type hydropneumatic accumulator topping up or brake pressure not enough；And work as oil pressure
Time excessive, then carry out pressure release by relief valve, it is ensured that the safe handling of bladder type hydropneumatic accumulator.So energy storage equipment possess topping up,
The function such as low pressure alarming, safeguard protection.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the present invention is described in further detail:
Fig. 1 is present configuration schematic diagram.
In figure: 1-oil pump, 2-oil absorption filter, 3-fuel tank, tetra-five-way brake valves of 4-, 5-bladder type hydropneumatic accumulator, 6-safety
Valve, 7-the first check valve, 8-low pressure warning switch, the right wet brake of 9-, the left wet brake of 10-, 11-return filter,
12-radiator, 13-the second check valve, 14-cleaner.
Detailed description of the invention
As it is shown in figure 1, a kind of fork truck heat dissipation type brakes, including left wet brake 10, right wet brake 9 with
And the oil pump 1 being connected with fuel tank 3, the oil outlet end of described oil pump 1 respectively with energy storage equipment, the oil-in of four five-way brake valves 4
Connecting, the brake port of described four five-way brake valves 4 is respectively with the brake port of left wet brake 10, right wet brake 9 even
Connect；The unloading port of described four five-way brake valves 4 by radiator 12 respectively with left wet brake 10, right wet brake 9
Oil-in connect；The urgent oil-in of described energy storage equipment and four five-way brake valves 4 connects.
Further, described energy storage equipment includes bladder type hydropneumatic accumulator 5, and the oil-in of described bladder type hydropneumatic accumulator 5 is single by first
Oil outlet end to valve 7 with oil pump 1 is connected；It is connected between outlet and the bladder type hydropneumatic accumulator 5 of described first check valve 7 and has relief valve 6
With low pressure warning switch 8, for the monitoring of oil pressure in bladder type hydropneumatic accumulator 5 and protection.
Further, described oil pump 1 be connected to oil absorption filter 2, cleaner 14 into and out of hydraulic fluid port, to system fluid
It is circulated filtration, it is ensured that the cleannes of hydraulic system oil liquid.
Further, between unloading port and the radiator 12 of described four five-way brake valves 4, it is provided with the second check valve 13, described
The oil outlet end of the second check valve 13 is connected with fuel tank 3.
Further, described left wet brake 10, right wet brake 9 oil-out all by return filter 11 and oil
Case 3 connects.
Brakes work process of the present invention is as follows:
1. free state
(braking, Fig. 1 shown in position being not carried out) when four five-way brake valves 4 are not operating, oil pump 1 provides fluid to four
Position five-way brake valve 4, fluid sequentially passes through the oil inlet P 1 of four five-way brake valves 4, unloading port N, the oil-in of radiator 12
S1, oil-out S2, right wet brake 9 oil inlet P 4, left wet brake 10 oil inlet P 5 respectively enter right wet brake 9
, in left wet brake 10；The most again from right wet brake 9 oil-out T2, left wet brake 10 oil-out T3, oil return
Filter 11 returns in fuel tank 3, it is achieved that carry out forcing cooling heat radiation to right wet brake 9, left wet brake 10.When cold
But, when fluid back pressure is more than 0.05MPa, fluid is opened the second check valve 13 and is returned to hydraulic oil container 3, it is achieved to right wet braking
Device 9 and left wet brake 10 are protected.
2. on-position (service brake)
When brake pedal, four five-way brake valves 4 start action, and the fluid that oil pump 1 provides can be stepped on according to braking
Plate stroke (can control four five-way brake spool stroke sizes) size produces right wet brake 9, left wet brake 10
Brake pressure size realize braking.Oil pump 1 provides fluid to four five-way brake valves 4, and fluid sequentially passes through four five-ways
The oil inlet P 1 of brake valve 4, brake port Br are respectively through right wet brake 9 brake port Br2 and left wet brake 10 brake port
Br1 enters in right wet brake 9 and left wet brake 10, it is achieved braking.Meanwhile, from the emptying of four five-way brake valves 4
Mouth N fluid out enters in right wet brake 9 and left wet brake 10, to right wet braking after radiator 12 cools down
Device 9 and left wet brake 10 carry out cooling.
It addition, can also realize carrying out topping up to bladder type hydropneumatic accumulator 5, the fluid that oil pump 1 provides is along with brake-pedal travel
Increasing, oil liquid pressure increases, and hence into opening the first check valve 7, fluid is through the first check valve 7, bladder type hydropneumatic accumulator oil-in
P3 carries out topping up to bladder type hydropneumatic accumulator 5.The relief valve 6 set in charging loop is to pacify in bladder type hydropneumatic accumulator 5 filling process
Full guard；And low pressure warning switch 8, it is bladder type hydropneumatic accumulator low-pressure alarming device, when pressure is less than setting minimum pressure, low pressure
Alarm switch 9 controls buzzer and sends chimes of doom, reminds human pilot to carry out to bladder type hydropneumatic accumulator topping up or brake pressure not enough.
3. brake hard
When oil pump quits work (because of engine misses) or damages, owing to the oil inlet P 1 of four five-way brake valves 4 is without pressure
Power, thus it cannot realize normal brake application.And when brake pedal is floored, the action of four five-way brake valves 4 and open urgent
Oil inlet P 2, the fluid in bladder type hydropneumatic accumulator 5 enters four through the urgent oil inlet P 2 of its 3, four five-way brake valves 4 of oil inlet P
Position five-way brake valve 4, and respectively enter right wet brake 9 and left wet brake 10 from its brake port Br, it is achieved promptly make
Dynamic.
Above example is not limited only to protection scope of the present invention, all basic thoughts based on the present invention and repair
Change or change broadly fall into protection scope of the present invention.
Claims (5)
1. a fork truck heat dissipation type brakes, including left wet brake (10), right wet brake (9) and and fuel tank
(3) oil pump (1) connected, it is characterised in that: the oil outlet end of described oil pump (1) respectively with energy storage equipment, four five-way brake valves
(4) oil-in connects, the brake port of described four five-way brake valves (4) respectively with left wet brake (10), right wet type system
The brake port of dynamic device (9) connects；The unloading port of described four five-way brake valves (4) by radiator (12) respectively with left wet type system
Dynamic device (10), the oil-in of right wet brake (9) connect；Promptly entering of described energy storage equipment and four five-way brake valve (4)
Hydraulic fluid port connects.
A kind of fork truck heat dissipation type brakes the most according to claim 1, it is characterised in that: described energy storage equipment includes
Bladder type hydropneumatic accumulator (5), the oil-in of described bladder type hydropneumatic accumulator (5) is connected by the oil outlet end of the first check valve (7) with oil pump (1)
Connect；It is connected between the outlet of described first check valve (7) and bladder type hydropneumatic accumulator (5) and has relief valve (6) and low pressure warning switch
(8).
A kind of fork truck heat dissipation type brakes the most according to claim 1, it is characterised in that: the entering of described oil pump (1),
Oil-out is connected to oil absorption filter (2), cleaner (14).
A kind of fork truck heat dissipation type brakes the most according to claim 1, it is characterised in that: described four five-ways braking
Be provided with the second check valve (13) between unloading port and the radiator (12) of valve (4), the oil outlet end of described second check valve (13) with
Fuel tank (3) connects.
A kind of fork truck heat dissipation type brakes the most according to claim 1, it is characterised in that: described left wet brake
(10), the oil-out of right wet brake (9) is all connected with fuel tank (3) by return filter (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410367471.6A CN104129373B (en) | 2014-07-30 | 2014-07-30 | A kind of fork truck heat dissipation type brakes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410367471.6A CN104129373B (en) | 2014-07-30 | 2014-07-30 | A kind of fork truck heat dissipation type brakes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104129373A CN104129373A (en) | 2014-11-05 |
| CN104129373B true CN104129373B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410367471.6A Active CN104129373B (en) | 2014-07-30 | 2014-07-30 | A kind of fork truck heat dissipation type brakes |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104875736A (en) * | 2015-06-09 | 2015-09-02 | 成都衔石科技有限公司 | Energy accumulator for auxiliary control of automobile |
| CN108082151B (en) * | 2017-12-14 | 2021-01-12 | 广西柳工机械股份有限公司 | Wet-type bridge braking and external cooling circulation system |
| CN110712631A (en) * | 2019-11-12 | 2020-01-21 | 湖南博邦重工有限公司 | Braking system with heat dissipation function |
| CN113883194B (en) * | 2021-09-10 | 2024-04-02 | 徐工集团工程机械股份有限公司 | Wet brake braking heat dissipation system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU530294B2 (en) * | 1978-12-25 | 1983-07-07 | K.K. Komatsu Seisakusho | Vehicle priority demand circuit |
| CN102889271A (en) * | 2012-11-01 | 2013-01-23 | 连云港天明装备有限公司 | Brake fluid cooling device |
| CN203268024U (en) * | 2013-05-31 | 2013-11-06 | 安徽合力股份有限公司 | Brake system of empty container stacking machine |
| CN103660928B (en) * | 2013-12-27 | 2016-09-21 | 阜阳市兴华机械装备有限公司 | Independent hot exchange enclosed fork truck hydrostatic drive system in parallel |
| CN204037527U (en) * | 2014-07-30 | 2014-12-24 | 安徽合力股份有限公司 | A kind of fork truck heat dissipation type brake system |
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2014
- 2014-07-30 CN CN201410367471.6A patent/CN104129373B/en active Active
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| CN104129373A (en) | 2014-11-05 |
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