CN108891397A - Electri forklift full power hydraulic brake system - Google Patents
Electri forklift full power hydraulic brake system Download PDFInfo
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- CN108891397A CN108891397A CN201810614089.9A CN201810614089A CN108891397A CN 108891397 A CN108891397 A CN 108891397A CN 201810614089 A CN201810614089 A CN 201810614089A CN 108891397 A CN108891397 A CN 108891397A
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- Prior art keywords
- mouthfuls
- oil
- braking
- valve
- electri forklift
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a kind of electri forklift full power hydraulic brake systems, including hydraulic oil container and oil pump, the oil outlet of the oil pump is connected to the P mouth of braking prefill valve, the ACC mouth of the braking prefill valve is connected to the P1 of accumulator and dynamic braking valve mouth, PBR mouthfuls are connected to parking brake, T mouthfuls of connection hydraulic oil containers, COOL mouthfuls are connected to type wet drive axle by radiator；The P3 mouth of drive axle is connected to radiator, and P2 mouthfuls are connected to the F of dynamic braking valve mouth, and T2 mouthfuls are connected to hydraulic oil container, the brake pedal connection of the dynamic braking valve and electri forklift.The present invention solves the problems, such as that braking system reliability and drive safety present in the large-tonnage electric forklift of the prior art be not high, is obviously improved the braking reliability of electri forklift and drive safety, has very high practical value.
Description
Technical field
The present invention relates to fork truck braking technology fields, and in particular to a kind of large-tonnage electric forklift Full-hydraulic braking apparatus system
System.
Background technique
It is electronic to large-tonnage（Battery）For fork truck, by electri forklift cells and after being fully loaded with, weight is big is influenced,
For the safety for guaranteeing electri forklift traveling, it is desirable to provide a set of reliable braking system of individual secure.In addition large-tonnage is electronic
Fork truck can generate very big braking moment in braking, therefore type wet drive axle brake can generate many heats, thus greatly
The reliability of electri forklift braking is reduced greatly.On the other hand, the safety of its braking system of the electri forklift of the prior art is not
Height, driver cannot understand the working condition of braking system in time, cannot carry out in time accordingly to the braking system problem
Processing, greatly reduce the drive safety of electri forklift.Publication date is July 13, Publication No. in 2011
The Chinese patent literature of CN102120447A discloses a kind of and matching multifunctional wet brake forklift hydraulic system.This is
System includes oil pump, preferential flow divider valve, integrated valve block, accumulator, dynamic braking valve, parking brake, running brake and fuel tank.
The oil outlet of oil pump is communicated with the P of preferential flow divider valve mouth, and preferential flow divider valve has an import three outlets, wherein first outlet
It is divided into two-way, is communicated all the way with the P1 of integrated valve block mouth, another way is communicated with the Pz of dynamic braking valve mouth；Second outlet and fork
Vehicle equipment oil circuit communicates；Third outlet is divided into two-way, communicates all the way with forklift steering system, another way and integrated valve block
P2 mouthfuls communicate；Integrated valve block includes parking braking solenoid valve, check valve, locking releasing solenoid valve and check valve etc..System benefit
It is shunted with preferential flow divider valve, does not need in addition to provide a set of oil sources just and can solve the parking braking of wet type bridge and service brake oil sources is asked
Topic simplifies pipe-line system, reduces costs so that hydraulic system of working and braking system become an organic whole.But it should
System is only applicable to small tonnage fork car, is not suitable for the electri forklift of large-tonnage, is also making without solving large-tonnage electric forklift
Very big braking moment can be generated when dynamic, type wet drive axle brake can generate many heats and cause electri forklift braking can
By property substantially reduce and prior art electri forklift existing for drive safety problem.
Summary of the invention
The purpose of the present invention is braking system reliabilities present in the large-tonnage electric forklift for the solution prior art not
High problem provides a kind of electri forklift full power hydraulic brake system, can effectively solve the large-tonnage electric forklift of the prior art
After fully loaded from it is great due to lead to that braking moment is larger, braking calorific value is big and the problem of causing braking system reliability to reduce,
Greatly improve the braking reliability of electri forklift.
It is another object of the present invention to ask for the safety that solves electri forklift its braking system of the prior art is not high
Topic, provides a kind of electri forklift full power hydraulic brake system, the electri forklift driver that can effectively solve the prior art cannot
The working condition for understanding braking system in time, cannot perform corresponding processing the braking system problem in time and lead to electricity
The not high problem of the drive safety of electrical forklift, is obviously improved the drive safety of electri forklift.
Present invention technical solution used for the above purpose is a kind of electri forklift full power hydraulic brake system,
Including hydraulic oil container and oil pump, the oil outlet of the oil pump is connected to the oil inlet P mouth of braking prefill valve, the braking prefill valve
Equipped with multiple oil outlets, wherein the first oil outlet is ACC mouthfuls, ACC mouthfuls are connected to the P1 of accumulator and dynamic braking valve mouth, power
T1 mouthfuls of connection hydraulic oil containers of oil outlet of brake valve；Second oil outlet is PBR mouthfuls, and PBR mouthfuls are connected to parking brake；Third goes out
Hydraulic fluid port is T mouthfuls, T mouthfuls of connection hydraulic oil containers；4th oil outlet is COOL mouthfuls, and COOL mouthfuls are connected to type wet drive axle by radiator,
The drive axle is set there are three hydraulic fluid port, is wherein connected to radiator for 3 mouthfuls of oil inlet P, 2 mouthfuls of high pressure oil oil inlet P and dynamic braking
The F mouth of valve is connected to, and T2 mouthfuls of oil outlet are connected to hydraulic oil container, the brake pedal connection of the dynamic braking valve and electri forklift.
The present invention solves the problems, such as that braking moment is big and radiator heat is big using the mode of braking using wet type dynamic braking, passes through
Cooling cycle oil liquid as drive axle after radiator cools down hydraulic oil, for giving drive axle cooling, Ke Yiyou
Effect solve the large-tonnage electric forklift of the prior art after fully loaded from it is great due to lead to that braking moment is larger, braking calorific value is big and
The problem of causing braking system reliability to reduce.
Preferably, the braking prefill valve is additionally provided with the 5th oil outlet being connected to ACC mouthfuls, the 5th oil outlet is S
Mouthful, described S mouthfuls is connected to hydraulic oil container by ball valve.When electri forklift needs to overhaul brake circuit because of relevant issues, at this time
It needs to guarantee accumulator pressure release into safety, at this moment by opening ball valve, quick pressure releasing can be carried out to accumulator, improve operation
Efficiency.
Preferably, the 4th oil outlet is equipped with temperature detect switch (TDS), temperature detect switch (TDS) connects the cooling fan on radiator,
Hydraulic oil filter is equipped between the radiator and drive axle.It is lower than the setting temperature of hydraulic oil temperature detect switch (TDS) in hydraulic fluid temperature
When angle value, the motor of cooling fan does not start, and hydraulic oil relies on natural circulation cooling；When hydraulic fluid temperature reaches temperature detect switch (TDS)
When set temperature value, temperature detect switch (TDS) is connected at this time, and by control signal, is rotated Oil pump electrical machinery, recycled oil liquid, cooling wind
The electrical power of fan rotates, and accelerates the cooling velocity of hydraulic oil.
Preferably, 3 mouthfuls of the oil inlet P of the drive axle is also connected to T3 mouthfuls of the oil inlet of check valve, check valve goes out
Mouth connection hydraulic oil container.When the cooling oil path of drive axle blocks the case where, and when drive axle internal pressure being caused to increase, this
When check valve open under the effect of the pressure, oil liquid can flow to hydraulic oil container by check valve, to protect drive axle against damages.
Preferably, 2 mouthfuls of the high pressure oil inlet P of the drive axle is also connected with braking light switch and power cut switch.
When braking the setup pressure value of oil liquid pressure value arrival brake lamp switch, brake lamp switch closure, brake lamp is lighted；With dynamic
Dynamic braking valve continues to step on, and when braking oil pressure force value increases to the setup pressure value of power cut switch, power cut is opened at this time
It closes and closes, the movable motor by controller to electri forklift powers off, and protects movable motor.
Preferably, the braking prefill valve be equipped with ACC mouthful associated MACC mouthfuls and AM mouthful, MACC mouthfuls of connection storage
Energy device filling liquid signaling switch, AM mouthfuls of connection accumulator low pressure warning switches.Brake the MACC mouth turn-on accumulator filling liquid of prefill valve
Signaling switch, for controlling solenoid valve and operation of oil pump as accumulator filling liquid；Connector accumulator low pressure warning switch at AM mouthfuls is used
Whether meet the needs of electri forklift normal brake application in detection energy storage pressure value.
Preferably, the pressure set points of the accumulator filling liquid signaling switch are 11-13MPa, accumulator low pressure alarming
The pressure set points of switch are lower than the pressure set points 1.5-2.5MPa of accumulator filling liquid signaling switch.
Preferably, the braking prefill valve be equipped with PBR mouthful associated LPBR mouthfuls and MPBR mouthful, it is described LPBR mouthfuls connect
Parking braking pressure switch, the pressure set points of parking braking pressure switch are higher than the pressure value that parking brake is opened, described
MPBR mouth be reserved pressure tap.Parking braking pressure switch is connected at LPBR mouthfuls, for detecting and prompting braking filling liquid indirectly
Whether the parking braking control valve SV1 in valve is normally opened and closed, so that whether detection parking brake is normally opened and closed indirectly.Work as oil circuit
When upper pressure value reaches the setup pressure value of park brake switch, parking braking pressure switch sends a signal to controller, and leads to
It crosses controller to show parking braking ring off signal in bridge instrumentation, electri forklift parking brake unlocks at this time, electronic
Fork truck can start；And MPBR mouthfuls are reserved pressure tap, the analysis detection after facilitating the later period to break down.
The present invention is directed to the characteristics of electri forklift, the use of solenoid electric valve is increased in entire braking system, and lead to
It crosses control route to show the working condition of electri forklift braking system in driver's cabin, driver is allow to fully understand its work
Make state, so that the electri forklift driver for effectively solving the prior art cannot understand system in time using corresponding counter-measure
The working condition of dynamic system, cannot perform corresponding processing the braking system problem in time and electri forklift is caused to be driven
The not high problem of safety is sailed, the entire braking system of electri forklift can be made safer, intelligence is convenient and energy saving, makes electricity
The drive safety of electrical forklift is obviously improved.
Preferably, the input end of the oil pump is equipped with oil-suction oil filter.
The beneficial effects of the invention are as follows：
1, the hydraulic wet braking mode to be matched using accumulator, dynamic braking valve, type wet drive axle, in addition to hydraulic oil liquid
Circulating cooling, can effectively solve large-tonnage electric forklift after fully loaded from it is great due to cause braking moment larger, braking hair
The big problem of heat, the reliability for braking electri forklift greatly improve, and the service life of related elements extends；In accumulator oil
The use of accumulator low pressure warning switch is added in road, can make the variation of pressure value in accumulator, quickly feed back to electronic
Truck driver, to guarantee the safety of electri forklift traveling；Accumulator filling liquid signaling switch is added, it can intelligently quickly
The filling liquid to accumulator is controlled, it is thus more energy efficient, it is convenient, reliably.
2, using the opening and closing of solenoid valve control parking braking control valve, and cooperate the use of parking braking pressure switch, it can
The change value of pressure of action message and parking braking pipeline that parking brake turns on or off directly is fed back to electricity
Electrical forklift driver it is possible thereby to guarantee the safety of electri forklift parking, while making easy to operate.
3, ball valve is accessed at accumulator, can be accumulator quick pressure releasing, and it is convenient when electri forklift overhauls to increase
Property, greatly improve safety.
4, on drive axle brake oil in-line, power cut switch is added, when electri forklift is braked and generates brake pressure,
It is switched by power cut and issues signal cut movable motor power supply to controller, protect movable motor, saved electric energy, make electronic
Fork truck is safer, energy saving and reliable.
5, check valve is added at drive axle cooling oil path oil inlet, radiates oil circuit oil inlet because the generations such as foreign matter are stifled in drive axle
When back pressure occurs in plug, pressure release can be bypassed by check valve, protects brake, eliminated braking hidden danger, guaranteed the safety of braking.
6, temperature detect switch (TDS) is added on drive axle cooling oil oil circuit, row controls cooling fan motor at feedback signal, makes to cool down
The switch of fan motor is automatically controlled according to the height of hydraulic fluid temperature, thus makes the control of cooling oil temperature more energy efficient, more intelligent.
7, the functions such as the control of accumulator filling liquid, parking braking control are integrated in a valve, may be implemented accordingly to control
Integrated, intelligent and facilitation, while simplifying the layout of fluid pressure line, save internal installation space, reduce liquid
The quantity and type for pressing element, reduce overall cost.
Detailed description of the invention
Fig. 1 is a kind of hydraulic system principle figure of electri forklift full power hydraulic brake system of the present invention；
Fig. 2 is a kind of hydraulic schematic diagram of present invention braking prefill valve；
Fig. 3 is the pressure switch logic chart based on energy storage pressure in present hydraulic system；
Fig. 4 is the pressure switch logic chart based on hydraulic fluid temperature in present hydraulic system.
In figure：1. hydraulic oil container, 2. oil-suction oil filters, 3. oil pumps, 4. braking prefill valves, 5. ball valves, 6. accumulator filling liquids
Signaling switch, 7. accumulators, 8. accumulator low pressure warning switches, 9. parking brake, 10. parking braking pressure switches, 11. is dynamic
Dynamic braking valve, 12. braking light switch, 13. power cuts switch, 14. drive axles, 15. check valves, 16. hydraulic oil filters,
17. radiator, 18. temperature detect switch (TDS)s.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing being more specifically described to technical solution of the present invention.
Embodiment 1
In such as Fig. 1 embodiment 1 shown in Fig. 2, a kind of electri forklift full power hydraulic brake system, including hydraulic oil container 1 and oil
Pump 3, the input end of the oil pump are equipped with oil-suction oil filter 2, and the oil outlet of oil pump is connected to the oil inlet P mouth of braking prefill valve 4.
The braking prefill valve is set there are five oil outlet, wherein the first oil outlet is ACC mouthfuls, ACC mouthfuls and accumulator 7 and dynamic braking valve
The brake pedal of 11 P1 mouth connection, dynamic braking valve and electri forklift connects and T1 mouthfuls of connection hydraulic oil containers of its oil outlet；System
Dynamic prefill valve be additionally provided with ACC mouthfuls associated MACC mouthfuls and AM mouthful, the MACC mouthfuls of connection accumulator filling liquid signaling switch 6, AM
Mouth connection accumulator low pressure warning switch 8, the pressure set points of the accumulator filling liquid signaling switch are 11-13MPa, accumulator
The pressure set points of low pressure warning switch are lower than the pressure set points 1.5-2.5MPa of accumulator filling liquid signaling switch.Second is fuel-displaced
Mouth is PBR mouthfuls, and PBR mouthfuls are connected to parking brake 9；Braking prefill valve be additionally provided with PBR mouthfuls associated LPBR mouthfuls and MPBR mouthful,
The LPBR mouthfuls of connection parking braking pressure switch 10, the pressure set points of parking braking pressure switch are beaten higher than parking brake
The pressure value opened, the MPBR mouth are reserved pressure tap.Third oil outlet is T mouthfuls, T mouthfuls of connection hydraulic oil containers.4th is fuel-displaced
Mouth is COOL mouthfuls, and COOL mouthfuls are connected to type wet drive axle 14 by radiator 17 and hydraulic oil filter 16, and the 4th oil outlet is also set
There is temperature detect switch (TDS) 18, temperature detect switch (TDS) connects and controls the cooling fan on radiator.5th oil outlet be S mouthful, the S mouth and
ACC mouthfuls associated, and S mouthfuls are connected to hydraulic oil container by ball valve 5.
Type wet drive axle is set there are three hydraulic fluid port, is wherein connected to radiator for 3 mouthfuls of oil inlet P, 2 mouthfuls of high pressure oil oil inlet P and
The F mouth of dynamic braking valve is connected to, while 2 mouthfuls of high pressure oil inlet P also connect with braking light switch 12 and power cut switch 13；It drives
3 mouthfuls of the oil inlet P of dynamic bridge is also connected to T3 mouthful of the oil inlet of check valve 15, T2 mouthfuls of the oil outlet of drive axle and check valve out
Mouth is connected to hydraulic oil container.
When electri forklift of the invention is worked with full power hydraulic brake system, hydraulic oil enters braking prefill valve 4 from oil pump 3
P mouthfuls, through the internal filled liquid function valve body UPCV1 for braking prefill valve 4（See Fig. 2）, it is 7 filling liquid of accumulator from ACC mouthfuls, works as accumulator
Setup pressure value of 7 pressure value in filling liquid signaling switch 6（The present embodiment is 12MPa）When following, accumulator filling liquid signal is opened
Signal can be generated to the controller of electri forklift by closing 6, and issue control signal oil supply pump motor power supply by controller, and oil pump supplies
Oil is accumulator filling liquid.When due to factors such as failures, leading to 7 pressure value of accumulator setting lower than accumulator low pressure warning switch 8
Level pressure force value（The present embodiment is 10MPa）When, accumulator low pressure warning switch 8 can send a signal to controller, controller at this time
It issues alarm signal and reminds electri forklift driver, and limit the speed of movable motor simultaneously（For tortoise speed）；Work as energy storage pressure
When being worth normal, alarm signal is eliminated, restriction cancellation of walking（See Fig. 3）.When electri forklift because relevant issues are needed to brake circuit
It when maintenance, needs 7 pressure release of accumulator guaranteeing safety at this time, ball valve 5 can be opened, for accumulator quick pressure releasing, improve
Operating efficiency.And the movement of electri forklift parking brake 9, it is by the solenoid valve inside accumulator 7 and braking prefill valve 4
SV1 is controlled, and the pressure oil liquid inside accumulator 7 is that braking valve for vehicle 9 provides open power, and solenoid valve SV1 control comes from
The circulating direction of 7 pressure oil liquid of accumulator；Meet the demands such as braking, the situation that solenoid valve SV1 must not be electric in 7 pressure of accumulator
Under, 9 oil suction chamber of parking brake be connected to hydraulic oil container 1, due to 9 contained spring of parking brake act on, parking braking at this time
Device 9 is in close state, and electri forklift parking is locked, and electri forklift can not start, and parking braking is had in driver's cabin
Show signal；After electri forklift driver's operation-control switch makes solenoid valve SV1 obtain electric, so that accumulator 7 internal pressure oil
Liquid leads to the oil suction chamber of parking brake 9, after the active force for overcoming 9 contained spring of parking brake, so that parking brake 9 is beaten
It opens, parking brake unlocks at this time, and electri forklift can start.Braking valve for vehicle inside braking prefill valve 4 leads to parking
On the oil circuit of brake 9, LPBR mouthfuls and MPBR mouthfuls are connected to, connect park brake switch 10 at LPBR mouthfuls, for detecting indirectly
And prompt whether the parking braking control valve SV1 in braking prefill valve 4 is normally opened and closed, so that detection parking brake 9 is indirectly
No normal opening and closing；The pressure set points of this switch are slightly above the pressure value of the opening of parking brake 9, when pressure value arrives on this oil circuit
Up to park brake switch 10 setup pressure value when, parking braking pressure switch 10 can send a signal to controller, and pass through control
Parking braking ring off signal is shown in bridge instrumentation that electri forklift parking brake unlocks at this time, electri forklift by device processed
It can start；MPBR mouthfuls are reserved pressure tap, the analysis detection after facilitating the later period to break down.Inside braking prefill valve 4
Prefill valve UPCV1 is after 7 supercharging pressure of accumulator reaches setup pressure value, and the oil inlet from P mouthfuls leads to heat dissipation through COOL mouthfuls at this time
Device 17（Equipped with cooling fan）With hydraulic oil filter 16；This oil circuit is equipped with hydraulic oil temperature detect switch (TDS) 18, in hydraulic fluid temperature
Lower than hydraulic oil temperature detect switch (TDS) 18 set temperature value when, the motor of cooling fan does not start, and hydraulic oil is cooling to lean on Natural Circulation
It is cooling；When temperature reaches the set temperature value of temperature detect switch (TDS) 18, temperature detect switch (TDS) 18 is connected at this time, and is believed by relevant control
Number, Oil pump electrical machinery is rotated, oil liquid is recycled, the cooling of hydraulic oil is accelerated in the electrical power rotation of cooling fan（See Fig. 4）.
When type wet drive axle 14 is braked, dynamic braking valve 11 is stepped on, and brakes required high-voltage oil liquid from dynamic braking valve F
Mouth outflow, the P2 mouth for leading to drive axle flows into running brake, on this oil circuit, connects brake lamp switch 12 and power cut is opened
Close 13；When braking the setup pressure value of oil liquid pressure value arrival brake lamp switch 12, brake lamp switch 12 is closed, and brake lamp is bright
It rises；As dynamic braking valve 11 continues to step on, when braking oil pressure force value increases to the setup pressure value of power cut switch 13, this
When power cut switch 13 be closed, the movable motor by controller to electri forklift powers off, and protects movable motor.It is filled from braking
The oil liquid of the COOL mouth outflow of liquid valve 4 enters after the cooling effect of radiator and the filtration of hydraulic oil filter 16
It is flowed out to the P3 mouth of drive axle 14, and from the T2 of drive axle 14 mouth, to do circulating cooling for drive axle 14, in drive axle 14
Before P3 mouthfuls, check valve 14 is connected, when the cooling oil path of drive axle 14 blocks the case where, and causes to press inside drive axle 14
When power increases, check valve 15 is opened at this time, and oil liquid can lead to hydraulic oil container 1 by check valve 15, thus protect drive axle 14 from
Damage.
In addition to the implementation, within the scope of the claims of the present invention and the specification, skill of the invention
Art feature or technical data can be reselected and be combined, to constitute new embodiment, these are all art technologies
Personnel are without carrying out what creative work can be realized, therefore the embodiment that these present invention are not described in also should be regarded as
Specific embodiments of the present invention and within protection scope of the present invention.
Claims (9)
1. a kind of electri forklift full power hydraulic brake system, including hydraulic oil container（1）And oil pump（3）, characterized in that the oil pump
Oil outlet and braking prefill valve（4）The connection of oil inlet P mouth, the braking prefill valve is equipped with multiple oil outlets, wherein first
Oil outlet is ACC mouthfuls, ACC mouthfuls and accumulator（7）And dynamic braking valve（11）P1 mouth connection, the oil outlet T1 of dynamic braking valve
Mouth connection hydraulic oil container；Second oil outlet is PBR mouthfuls, PBR mouthfuls and parking brake（9）Connection；Third oil outlet is T mouthfuls, T mouthfuls
It is connected to hydraulic oil container；4th oil outlet is COOL mouthfuls, and COOL mouthfuls pass through radiator（17）It is connected to type wet drive axle（14）, the drive
Dynamic bridge is set there are three hydraulic fluid port, is wherein connected to radiator for 3 mouthfuls of oil inlet P, the F mouth of 2 mouthfuls of high pressure oil oil inlet P and dynamic braking valve
Connection, T2 mouthfuls of oil outlet are connected to hydraulic oil container, the brake pedal connection of the dynamic braking valve and electri forklift.
2. electri forklift full power hydraulic brake system according to claim 1, characterized in that the braking prefill valve is also
Equipped with ACC mouthfuls of associated 5th oil outlets, the 5th oil outlet be S mouthfuls, described S mouthfuls passes through ball valve（5）It is connected to hydraulic oil container.
3. the electri forklift full power hydraulic brake system according to claim 1, characterized in that the 4th oil outlet
Equipped with temperature detect switch (TDS)（18）, temperature detect switch (TDS) connects the cooling fan on radiator, equipped with liquid between the radiator and drive axle
Pressure oil filter（16）.
4. the electri forklift full power hydraulic brake system according to claim 1, characterized in that the oil inlet of the drive axle
Mouthfuls P3 mouthful and and check valve（15）T3 mouthfuls of oil inlet connection, the outlet hydraulic oil container of check valve.
5. electri forklift full power hydraulic brake system according to claim 1, characterized in that the high pressure of the drive axle into
P2 mouthfuls of hydraulic fluid port also and braking light switch（12）It is switched with power cut（13）Connection.
6. the electri forklift full power hydraulic brake system according to claim 1, characterized in that the braking prefill valve is set
Have with ACC mouthfuls associated MACC mouthfuls and AM mouthful, the MACC mouthfuls of connection accumulator filling liquid signaling switch（6）, AM mouthfuls of connection accumulation of energys
Device low pressure warning switch（8）.
7. electri forklift full power hydraulic brake system according to claim 6, characterized in that the accumulator filling liquid signal
The pressure set points of switch are 11-13MPa, and the pressure set points of accumulator low pressure warning switch are opened lower than accumulator filling liquid signal
The pressure set points 1.5-2.5MPa of pass.
8. electri forklift full power hydraulic brake system according to claim 1, characterized in that the braking prefill valve is equipped with
With PBR mouthfuls associated LPBR mouthfuls and MPBR mouthful, the LPBR mouthfuls of connection parking braking pressure switch（10）, parking braking pressure opens
The pressure set points of pass are higher than the pressure value that parking brake is opened, and the MPBR mouth is reserved pressure tap.
9. electri forklift full power hydraulic brake system according to claim 1-8, characterized in that the import of oil pump
End is equipped with oil-suction oil filter（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614089.9A CN108891397A (en) | 2018-06-14 | 2018-06-14 | Electri forklift full power hydraulic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614089.9A CN108891397A (en) | 2018-06-14 | 2018-06-14 | Electri forklift full power hydraulic brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108891397A true CN108891397A (en) | 2018-11-27 |
Family
ID=64344762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810614089.9A Pending CN108891397A (en) | 2018-06-14 | 2018-06-14 | Electri forklift full power hydraulic brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108891397A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001614A (en) * | 2019-04-14 | 2019-07-12 | 湖南鹏翔星通汽车有限公司 | Protect system in a kind of wet sprayer hydraulic control chassis |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934789A (en) * | 2010-09-08 | 2011-01-05 | 芜湖盛力制动有限责任公司 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
| US20130195681A1 (en) * | 2012-01-09 | 2013-08-01 | Eaton Corporation | Method for obtaining a full range of lift speeds using a single input |
| CN203427776U (en) * | 2013-08-30 | 2014-02-12 | 约翰迪尔（天津）有限公司 | Quantitative open-core hydraulic circuit system and wheel type walking device provided with system |
| CN105020204A (en) * | 2015-06-24 | 2015-11-04 | 湖北先行专用汽车有限公司 | Power forklift hydraulic part pressure test equipment |
| CN106143456A (en) * | 2016-08-30 | 2016-11-23 | 安徽合力股份有限公司 | The brakes of large-tonnage storage battery forktruck |
| CN206049646U (en) * | 2016-08-30 | 2017-03-29 | 安徽合力股份有限公司 | The brakes of large-tonnage storage battery forktruck |
-
2018
- 2018-06-14 CN CN201810614089.9A patent/CN108891397A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934789A (en) * | 2010-09-08 | 2011-01-05 | 芜湖盛力制动有限责任公司 | Hydraulic brake valve of full-hydraulic brake system in construction machinery |
| US20130195681A1 (en) * | 2012-01-09 | 2013-08-01 | Eaton Corporation | Method for obtaining a full range of lift speeds using a single input |
| CN203427776U (en) * | 2013-08-30 | 2014-02-12 | 约翰迪尔（天津）有限公司 | Quantitative open-core hydraulic circuit system and wheel type walking device provided with system |
| CN105020204A (en) * | 2015-06-24 | 2015-11-04 | 湖北先行专用汽车有限公司 | Power forklift hydraulic part pressure test equipment |
| CN106143456A (en) * | 2016-08-30 | 2016-11-23 | 安徽合力股份有限公司 | The brakes of large-tonnage storage battery forktruck |
| CN206049646U (en) * | 2016-08-30 | 2017-03-29 | 安徽合力股份有限公司 | The brakes of large-tonnage storage battery forktruck |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110001614A (en) * | 2019-04-14 | 2019-07-12 | 湖南鹏翔星通汽车有限公司 | Protect system in a kind of wet sprayer hydraulic control chassis |
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