CN104129373A - Heat dissipation type brake system for forklift - Google Patents
Heat dissipation type brake system for forklift Download PDFInfo
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- CN104129373A CN104129373A CN201410367471.6A CN201410367471A CN104129373A CN 104129373 A CN104129373 A CN 104129373A CN 201410367471 A CN201410367471 A CN 201410367471A CN 104129373 A CN104129373 A CN 104129373A
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Abstract
The invention provides a heat dissipation type brake system for a forklift. The brake system comprises a left wet brake, a right wet brake, and an oil pump which is connected with an oil tank, wherein an oil outlet end of the oil pump is connected with oil inlets of an energy storage device and a four-position five-way brake valve, and a brake opening of the four-position five-way brake valve is connected with brake openings of the left wet brake and the right wet brake; an oil discharge opening of the four-position five-way brake valve is connected with oil inlets of the left wet brake and the right wet brake through a heat dissipation device; and the energy storage device is connected with an emergency oil inlet of the four-position five-way brake valve. The heat dissipation of oil liquid in the brake system can be realized through the four-position five-way brake valve and the energy storage device, so that the rise of the oil temperature of the system is reduced, and the working performance of a whole vehicle can be improved. When the oil pump stops working or is damaged, the emergency braking 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 brake system.
Background technology
Brake system is fork truck safety traffic and carries out smoothly the requisite device of operation, and the performance of deceleration and stopping performance directly has influence on the service efficiency of fork truck.Full hydraulic power brake is the up-to-date technology comparatively extensively adopting in current construction machinery and equipment at present, it can obtain the lock torque needing by enough less pedal forces, thereby alleviated operator's labour intensity, improved the operation traveling comfort of car load, and braking time and stopping distance shorter than non-dynamic brake.
At present, 5～10 ton forklift brake system are fluid pressure type driver trains, and what its major part adopted is disc type or shoe brake; Brake system is mainly comprised of brake pedal, gear type pump, brake activation valve, spring accumul ator and drg etc.But this brake system is difficult to meet the requirement of oil-immersed multi-disk brake, this is due to oil-immersed multi-disk brake, to belong to the braking model of clutch type, its braking time can produce a large amount of heats, and it is very fast to cause system hydraulic fluid temperature to raise, and need to use the hydraulic oil recirculation of dispelling the heat.Now both at home and abroad oil-immersed multi-disk brake is used in fewer on 5～10 ton forklifts, and this is because 5～10 ton forklifts are subject to himself to limit, and cannot solve the oil sources problem of cooling system; In addition, 5～10 ton forklifts are generally used spring accumul ator capacity little, are difficult to meet the requirement of braking when 5～10 ton forklift oil-immersed multi-disk brakes quit work at oil pump (because of engine off) or damage.So 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, in order to solve the problems of the technologies described above, provides a kind of fork truck heat dissipation type brake system, when realizing braking, hydraulic oil is carried out coolingly, and brake system is carried out to safety guard-safeguard.
Technical scheme of the present invention is: a kind of fork truck heat dissipation type brake system, comprise left oil-immersed multi-disk brake, right oil-immersed multi-disk brake and the oil pump being connected with fuel tank, the oil outlet end of described oil pump is connected with the oil inlet of energy storage equipment, four five-way brake activation valves respectively, and the brake port of described four five-way brake activation valves is connected with the brake port of left oil-immersed multi-disk brake, right oil-immersed multi-disk brake respectively; The unloading port of described four five-way brake activation valves is connected with the oil inlet of left oil-immersed multi-disk brake, right oil-immersed multi-disk brake respectively by radiator; Described energy storage equipment is connected with the urgent oil inlet of four five-way brake activation valves.
Further, described energy storage equipment comprises bladder type hydropneumatic accumulator, and the oil inlet of described bladder type hydropneumatic accumulator is connected with the oil outlet end of oil pump by the first check valve; Between the outlet of described the first check valve and bladder type hydropneumatic accumulator, be connected with safety valve and low pressure warning switch.
Further, described oil pump is connected with respectively oil absorption filter, fil into and out of hydraulic fluid port.
Further, be provided with the second check valve between the unloading port of described four five-way brake activation valves and radiator, the oil outlet end of described the second check valve is connected with fuel tank.
Further, the oil outlet of described left oil-immersed multi-disk brake, right oil-immersed multi-disk brake is all connected with fuel tank by return filter.
The present invention has formed a kind of brake system that is applicable to 5～10 ton forklifts and has heat sinking function by novel four five-way brake activation valves and energy storage equipment and existing brake pedal, oil pump, oil-immersed multi-disk brake etc., it not only can meet 5～10 ton forklift wet braking performance requriementss, can also make braking and cooling system share an oil pump and an oil sources, can not only realize braking, can also realize the fluid heat radiation to hydraulic efficiency pressure system, be that fluid is shunted to radiator and dispelled the heat by brake activation valve, the rising of reduction system oil temperature, is conducive to improve car load serviceability.
In the present invention, four five-way brake activation valves are provided with oil inlet, unloading port, brake port, urgent oil inlet and these five hydraulic fluid ports of return opening, can realize the functions such as braking, topping up, cooling and off-load; And by the valve rod of four five-way brake activation valves of operation, just can realize three mode of operations of four five-way brake activation valves: free state, braking mode and emergency braking condition.
The second check valve is as heat radiation fluid bypass leakage passage; the effect of realization to the safety guard-safeguard of the left and right oil-immersed multi-disk brake of wet type; when cooling oil back pressure surpasses 0.05MPa; fluid is opened the second check valve fluid off-load is fallen; and get back in hydraulic reservoir, thereby realize the protective effect to right oil-immersed multi-disk brake and left oil-immersed multi-disk brake.
The unloading port of four five-way brake activation valves imports radiator by fluid and dispels the heat; again cooled fluid is imported respectively in left and right oil-immersed multi-disk brake and carries out cooling to it; and fluid is by heat, the oil outlet by left and right oil-immersed multi-disk brake brings back in fuel tank; thereby by the fluid after radiator is cooling, left and right oil-immersed multi-disk brake is forced to cooling heat dissipation, protected the normal work of equipment.
When quitting work at oil pump (because of engine off) or damaging, in the time of cannot realizing normal brake application due to the oil inlet of four five-way brake activation valves without pressure, the fluid that bladder type hydropneumatic accumulator is stored imports four five-way brake activation valves and enters left and right oil-immersed multi-disk brake and realize emergency braking from its brake port through the urgent oil inlet of four five-way brake activation valves.In addition, on the chargine line of bladder type hydropneumatic accumulator, be provided with low pressure warning switch and safety valve, when bladder type hydropneumatic accumulator internal pressure is when setting minimal pressure, low pressure warning switch sends chimes of doom, reminds navigating mate to carry out to bladder type hydropneumatic accumulator topping up or brake-pressure not enough; And when oil pressure is excessive, by safety valve, carry out pressure release, guaranteed the safe handling of bladder type hydropneumatic accumulator.So energy storage equipment possesses the functions such as topping up, low pressure alarming, safety guard-safeguard.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Fig. 1 is structural representation of the present invention.
In figure: 1-oil pump, 2-oil absorption filter, 3-fuel tank, tetra-five-way brake activation valves of 4-, 5-bladder type hydropneumatic accumulator, 6-safety valve, 7-the first check valve, 8-low pressure warning switch, the right oil-immersed multi-disk brake of 9-, the left oil-immersed multi-disk brake of 10-, 11-return filter, 12-radiator, 13-the second check valve, 14-fil.
The specific embodiment
As shown in Figure 1, a kind of fork truck heat dissipation type brake system, comprise left oil-immersed multi-disk brake 10, right oil-immersed multi-disk brake 9 and the oil pump 1 being connected with fuel tank 3, the oil outlet end of described oil pump 1 is connected with the oil inlet of energy storage equipment, four five-way brake activation valves 4 respectively, and the brake port of described four five-way brake activation valves 4 is connected with the brake port of left oil-immersed multi-disk brake 10, right oil-immersed multi-disk brake 9 respectively; The unloading port of described four five-way brake activation valves 4 is connected with the oil inlet of left oil-immersed multi-disk brake 10, right oil-immersed multi-disk brake 9 respectively by radiator 12; Described energy storage equipment is connected with the urgent oil inlet of four five-way brake activation valves 4.
Further, described energy storage equipment comprises bladder type hydropneumatic accumulator 5, and the oil inlet of described bladder type hydropneumatic accumulator 5 is connected with the oil outlet end of oil pump 1 by the first check valve 7; Between the outlet of described the first check valve 7 and bladder type hydropneumatic accumulator 5, be connected with safety valve 6 and low pressure warning switch 8, for monitoring and the protection to bladder type hydropneumatic accumulator 5 oil pressure.
Further, described oil pump 1 into and out of hydraulic fluid port, be connected with respectively oil absorption filter 2, fil 14, system fluid is carried out to circulating filtration, guarantee the cleanliness level of hydraulic system oil liquid.
Further, be provided with the second check valve 13 between the unloading port of described four five-way brake activation valves 4 and radiator 12, the oil outlet end of described the second check valve 13 is connected with fuel tank 3.
Further, the oil outlet of described left oil-immersed multi-disk brake 10, right oil-immersed multi-disk brake 9 is all connected with fuel tank 3 by return filter 11.
Brake system working process of the present invention is as follows:
1. free state
When moving, four five-way brake activation valves 4 (do not implement braking, position shown in Fig. 1), oil pump 1 provides fluid to four five-way brake activation valves 4, and fluid enters respectively in right oil-immersed multi-disk brake 9, left oil-immersed multi-disk brake 10 through oil inlet P 1, the N of unloading port, oil inlet S1, the oil outlet S2 of radiator 12, right oil-immersed multi-disk brake 9 oil inlet P 4, left oil-immersed multi-disk brake 10 oil inlet P 5 of four five-way brake activation valves 4 successively; And then get back to fuel tank 3 from right oil-immersed multi-disk brake 9 oil outlet T2, left oil-immersed multi-disk brake 10 oil outlet T3, return filter 11, realized right oil-immersed multi-disk brake 9, left oil-immersed multi-disk brake 10 have been forced to cooling heat dissipation.When cooling oil back pressure surpasses 0.05MPa, fluid is opened the second check valve 13 and is got back to hydraulic reservoir 3, realizes right oil-immersed multi-disk brake 9 and left oil-immersed multi-disk brake 10 are protected.
2. braking mode (service brake)
When stepping on brake pedal, four five-way brake activation valves 4 start action, and the fluid that oil pump 1 provides can produce the brake-pressure size of right oil-immersed multi-disk brake 9, left oil-immersed multi-disk brake 10 is realized to braking according to brake-pedal travel (can control four five-way brake spool stroke sizes) size.Oil pump 1 provides fluid to four five-way brake activation valves 4, fluid enters in right oil-immersed multi-disk brake 9 and left oil-immersed multi-disk brake 10 through right oil-immersed multi-disk brake 9 brake port Br2 and left oil-immersed multi-disk brake 10 brake port Br1 respectively through oil inlet P 1, the brake port Br of four five-way brake activation valves 4 successively, realizes braking., from the N of unloading port of four five-way brake activation valves 4 fluid out, after radiator 12 is cooling, enter in right oil-immersed multi-disk brake 9 and left oil-immersed multi-disk brake 10 meanwhile, right oil-immersed multi-disk brake 9 and left oil-immersed multi-disk brake 10 are carried out to cooling.
In addition, can also realize to bladder type hydropneumatic accumulator 5 and carry out topping up, the fluid that oil pump 1 provides is along with the increase of brake-pedal travel, and oil liquid pressure increases, thereby enter, open the first check valve 7, fluid carries out topping up to bladder type hydropneumatic accumulator 5 through the first check valve 7, bladder type hydropneumatic accumulator oil inlet P 3.The safety valve 6 of establishing in topping up loop is to carrying out safety guard-safeguard in bladder type hydropneumatic accumulator 5 topping up processes; And low pressure warning switch 8 is bladder type hydropneumatic accumulator low-pressure alarming devices, when pressure is when setting minimal pressure, low pressure warning switch 9 is controlled buzzer phones and is sent chimes of doom, reminds navigating mate to carry out to bladder type hydropneumatic accumulator topping up or brake-pressure not enough.
3. emergency braking
When oil pump quits work (because of engine off) or damages, because the oil inlet P 1 of four five-way brake activation valves 4 is without pressure, thereby it cannot realize normal brake application.And when brake pedal is floored, four five-way brake activation valves, 4 actions and open urgent oil inlet P 2, fluid in bladder type hydropneumatic accumulator 5 enters four five-way brake activation valves 4 through the urgent oil inlet P 2 of its oil inlet P 3, four five-way brake activation valves 4, and enter respectively right oil-immersed multi-disk brake 9 and left oil-immersed multi-disk brake 10 from its brake port Br, realize emergency braking.
Above embodiment is not limited only to protection scope of the present invention, all based on basic thought of the present invention, modify or change all belong to protection scope of the present invention.
Claims (5)
1. a fork truck heat dissipation type brake system, comprise left oil-immersed multi-disk brake (10), right oil-immersed multi-disk brake (9) and the oil pump (1) being connected with fuel tank (3), it is characterized in that: the oil outlet end of described oil pump (1) is connected with the oil inlet of energy storage equipment, four five-way brake activation valves (4) respectively, the brake port of described four five-way brake activation valves (4) is connected with the brake port of left oil-immersed multi-disk brake (10), right oil-immersed multi-disk brake (9) respectively; The unloading port of described four five-way brake activation valves (4) is connected with the oil inlet of left oil-immersed multi-disk brake (10), right oil-immersed multi-disk brake (9) respectively by radiator (12); Described energy storage equipment is connected with the urgent oil inlet of four five-way brake activation valves (4).
2. a kind of fork truck heat dissipation type brake system according to claim 1, it is characterized in that: described energy storage equipment comprises bladder type hydropneumatic accumulator (5), the oil inlet of described bladder type hydropneumatic accumulator (5) is connected with the oil outlet end of oil pump (1) by the first check valve (7); Between the outlet of described the first check valve (7) and bladder type hydropneumatic accumulator (5), be connected with safety valve (6) and low pressure warning switch (8).
3. a kind of fork truck heat dissipation type brake system according to claim 1, is characterized in that: described oil pump (1) into and out of hydraulic fluid port, be connected with respectively oil absorption filter (2), fil (14).
4. a kind of fork truck heat dissipation type brake system according to claim 1, it is characterized in that: between the unloading port of described four five-way brake activation valves (4) and radiator (12), be provided with the second check valve (13), the oil outlet end of described the second check valve (13) is connected with fuel tank (3).
5. a kind of fork truck heat dissipation type brake system according to claim 1, is characterized in that: the oil outlet of described left oil-immersed multi-disk brake (10), right oil-immersed multi-disk 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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN104129373A true CN104129373A (en) | 2014-11-05 |
| CN104129373B CN104129373B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410367471.6A Active CN104129373B (en) | 2014-07-30 | 2014-07-30 | A kind of fork truck heat dissipation type brakes |
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Cited By (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 |
| CN108082151A (en) * | 2017-12-14 | 2018-05-29 | 广西柳工机械股份有限公司 | Wet type bridge is braked 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 |
| CN113883194A (en) * | 2021-09-10 | 2022-01-04 | 徐工集团工程机械股份有限公司 | Wet brake braking cooling system |
Citations (5)
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| US4321793A (en) * | 1978-12-25 | 1982-03-30 | Kabushiki Kaisha Komatsu Seisakusho | Integrated hydraulic circuit for off highway work vehicles |
| 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 |
| CN103660928A (en) * | 2013-12-27 | 2014-03-26 | 谷维才 | Autonomous-heat-exchange parallel-connection closed type forklift static-pressure drive system |
| 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 |
-
2014
- 2014-07-30 CN CN201410367471.6A patent/CN104129373B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4321793A (en) * | 1978-12-25 | 1982-03-30 | Kabushiki Kaisha Komatsu Seisakusho | Integrated hydraulic circuit for off highway work vehicles |
| 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 |
| CN103660928A (en) * | 2013-12-27 | 2014-03-26 | 谷维才 | Autonomous-heat-exchange parallel-connection closed type forklift static-pressure drive system |
| 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 |
Cited By (6)
| 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 |
| CN108082151A (en) * | 2017-12-14 | 2018-05-29 | 广西柳工机械股份有限公司 | Wet type bridge is braked and external cooling circulation system |
| 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 |
| CN113883194A (en) * | 2021-09-10 | 2022-01-04 | 徐工集团工程机械股份有限公司 | Wet brake braking cooling system |
| 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 |
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| CN104129373B (en) | 2016-08-24 |
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