CN208595123U - Electri forklift and its hydraulic control system - Google Patents
Electri forklift and its hydraulic control system Download PDFInfo
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- CN208595123U CN208595123U CN201821343392.1U CN201821343392U CN208595123U CN 208595123 U CN208595123 U CN 208595123U CN 201821343392 U CN201821343392 U CN 201821343392U CN 208595123 U CN208595123 U CN 208595123U
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Abstract
The utility model discloses a kind of hydraulic control system of electri forklift, including the first oil pump, the second oil pump, the first motor for driving the first oil pump and the second motor for driving the second oil pump, the delivery outlet connection brake circuit of first oil pump turns to oil circuit and raising oil circuit, the delivery outlet of second oil pump connects raising oil circuit, it further include the Electronic Control Assembly for communicating to connect first motor and the second motor, Electronic Control Assembly can be according to the start and stop of the second motor of working state control of first motor.Avoid single oil pump single motor volume it is excessive and caused by space waste, improve inner space utilization rate, while only needing when low-power consumption single oil pump single motor work that can maintain fork truck normal driving, reduce energy consumption.The utility model also provides a kind of electri forklift including above-mentioned hydraulic control system.
Description
Technical field
The utility model relates to fork truck control fields, more particularly to a kind of hydraulic control system of electri forklift.In addition,
The utility model further relates to a kind of electri forklift including above-mentioned hydraulic control system.
Background technique
Electri forklift has many advantages, such as that operation control is easy flexibly, and the manipulation strength of operator is relatively low.Its is electronic
Steering system, acceleration-controlled system, hydraulic control system and brake system are all controlled by electric signal, greatly reduce operation
The labor intensity of personnel, the accuracy for improving working efficiency and work have very big help.And its low noise, nothing
The advantage of exhaust emissions has also obtained the approval of many users.
Existing electri forklift mostly uses greatly single motor that single oil pump is driven to realize that braking, steering and lifting etc. are a series of
Demand for control, and large-tonnage electric forklift needs the oil liquid of more huge discharge that vehicle is supported to work, and then needs more high-power
Motor, using single oil pump single motor, one side volume is larger, is not easy to arrange；On the other hand when operating condition is simple, hydraulic flow is needed
When asking smaller, entire Oil pump electrical machinery work has portion of energy loss, is unfavorable for energy conservation.
Therefore, how to provide a kind of flexibly controllable and energy-efficient hydraulic control system is that those skilled in the art are current
The technical issues that need to address.
Utility model content
The purpose of the utility model is to provide a kind of hydraulic control systems of electri forklift, are distinguished by two motors of setting
Drive two oil pumps, according to circumstances control motor start and stop, avoid single oil pump single motor volume it is excessive and caused by space waste,
Inner space utilization rate is improved, while only needing single oil pump single motor work that fork truck can be maintained normally to drive when low-power consumption
It sails, reduces energy consumption.The another object of the utility model is to provide a kind of electri forklift including above-mentioned hydraulic control system.
In order to solve the above technical problems, the utility model provides a kind of hydraulic control system of electri forklift, including first
Oil pump, the second oil pump, the first motor for driving the first oil pump and the second motor for driving the second oil pump, described first
The delivery outlet connection brake circuit of oil pump turns to oil circuit and raising oil circuit, and the delivery outlet of second oil pump connects raising oil circuit,
It further include the Electronic Control Assembly for communicating to connect the first motor and second motor, the Electronic Control Assembly can be according to described
The start and stop of second motor described in the working state control of one motor.
Preferably, first oil pump is specially duplex pump, and the first delivery outlet of the duplex pump connects the brake oil
Second delivery outlet on road, the duplex pump connects the steering oil circuit and the raising oil circuit, and second oil pump is specially tooth
Wheel pump.
It preferably, further include multi-way valve, two oil inlets of the multi-way valve are respectively communicated with the delivery outlet of the gear pump
With the second delivery outlet of the duplex pump, the oil outlet of the multi-way valve is respectively communicated with the raising oil circuit and the steering oil
The hydraulic oil that second delivery outlet of duplex pump exports can be inputted respectively the raising oil circuit and described by road, the multi-way valve
Turn to oil circuit.
Preferably, second delivery outlet of duplex pump is provided with overflow valve between the raising oil circuit.
Preferably, the gear pump passes through filter with the duplex pump and is connected to fuel tank.
Preferably, described turn to is provided with check valve and filter in parallel between oil circuit and the fuel tank.
It preferably, further include detector for detecting the first operation of oil pump electric current, described in the communication detector connection
Electronic Control Assembly, when the operating current of the detector acquisition is greater than preset value, the Electronic Control Assembly can control described the
Two pump starts, when the operating current of the detector acquisition is less than preset value, the Electronic Control Assembly can control described
Second oil pump stops.
The utility model provides a kind of electri forklift, including hydraulic control system, on the hydraulic control system is specially
State hydraulic control system described in any one.
The utility model provides a kind of hydraulic control system of electri forklift, including the first oil pump, the second oil pump, for driving
The first motor of the first oil pump and the second motor for driving the second oil pump are moved, the delivery outlet of the first oil pump connects brake oil
Road turns to oil circuit and raising oil circuit, and the delivery outlet of the second oil pump connects raising oil circuit, further includes communication connection first motor and the
The Electronic Control Assembly of two motors, Electronic Control Assembly can be according to the start and stop of the second motor of working state control of first motor.
When fork truck starting, Electronic Control Assembly starts first motor work first, drives the first operation of oil pump, and the first oil pump is
Brake circuit and steering oil circuit fuel feeding, electri forklift can normal driving at this time.When fork truck carries out raising work, turn in oil circuit
The oil liquid having more enters raising oil circuit, and the discharge capacity of the first oil pump further increases, when the load of the first oil pump increases to certain value
When, the second electric motor starting is controlled, the second operation of oil pump is driven, more sufficient oil hydraulic power is provided for raising oil circuit.When completing
After rising work, workload is reduced, and the second motor of control stops working, and then the second oil pump stops working, and is tieed up by the first oil pump
Hold oil liquid required for fork truck normal driving.
Two oil pumps are respectively driven by the way that two motors are arranged, motor start and stop is according to circumstances controlled, avoids single oil pump list
Motor volume it is excessive and caused by space waste, improve inner space utilization rate, while only needing single oil pump list when low-power consumption
A motor work can maintain fork truck normal driving, reduce energy consumption.
The utility model also provides a kind of electri forklift including above-mentioned hydraulic control system, due to above-mentioned hydraulic control system
System has above-mentioned technique effect, and above-mentioned electri forklift should also have same technical effect, is no longer discussed in detail herein.
Detailed description of the invention
Fig. 1 is a kind of hydraulic schematic diagram of specific embodiment of hydraulic control system provided by the utility model.
Specific embodiment
The core of the utility model is to provide a kind of hydraulic control system of electri forklift, is distinguished by two motors of setting
Drive two oil pumps, according to circumstances control motor start and stop, avoid single oil pump single motor volume it is excessive and caused by space waste,
Inner space utilization rate is improved, while only needing single oil pump single motor work that fork truck can be maintained normally to drive when low-power consumption
It sails, reduces energy consumption.Another core of the utility model is to provide a kind of electri forklift including above-mentioned hydraulic control system.
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and specific implementation
The utility model is described in further detail for mode.
Referring to FIG. 1, Fig. 1 is a kind of the hydraulic of specific embodiment of hydraulic control system provided by the utility model
Schematic diagram.
Specific embodiment of the present invention provides a kind of hydraulic control system of electri forklift, including the first oil pump,
Two oil pumps, first motor 1 and the second motor 3, first motor 1 drive the first oil pump, and the second motor 3 drives the second oil pump.Wherein,
The delivery outlet of first oil pump connects brake circuit 9, steering oil circuit 8 and raising oil circuit 7, the delivery outlet of the second oil pump simultaneously and connects
Oil circuit 7 is risen, further includes the Electronic Control Assembly 5 for communicating to connect first motor 1 and the second motor 3, Electronic Control Assembly 5 can be according to the first electricity
The start and stop of the second motor of working state control 3 of machine 1.
When fork truck starting, Electronic Control Assembly 5 starts the work of first motor 1 first, drives the first operation of oil pump, the first oil pump
For brake circuit 9 and 8 fuel feeding of oil circuit is turned to, electri forklift can normal driving at this time.When fork truck carries out raising work, steering oil
The oil liquid having more in road 8 enters raising oil circuit 7, and the discharge capacity of the first oil pump further increases, when the load of the first oil pump increases to
When certain value, Electronic Control Assembly 5 controls the starting of the second motor 3, drives the second operation of oil pump, provides for raising oil circuit 7 more sufficient
Oil hydraulic power.After completing raising work, workload is reduced, and the second motor 3 of control stops working, and then the second oil pump stops
Work maintains oil liquid required for fork truck normal driving as the first oil pump.
Two oil pumps are respectively driven by the way that two motors are arranged, motor start and stop is according to circumstances controlled, avoids single oil pump list
Motor volume it is excessive and caused by space waste, improve inner space utilization rate, while only needing single oil pump list when low-power consumption
A motor work can maintain fork truck normal driving, reduce energy consumption.
In the hydraulic control system that specific embodiment of the present invention provides, the first oil pump is specially duplex pump 2, when
When fast feed, 2 both ends of duplex pump while fuel feeding, pressure is lower at this time, when work feed, by low-capacity pump fuel feeding, at this time
Pressure is higher, while making high-capacity pump off-load on oil piping system, this is compared with using the pump of a high-pressure high-flow, Ke Yijie
The energy is saved, oil liquid fever is reduced, the first delivery outlet of duplex pump 2 connects brake circuit 9, the second delivery outlet connection of duplex pump 2
It turns to oil circuit 8 and raising oil circuit 7, the second oil pump is specially gear pump 4, structure is simple, cheap.Other types can also be used
Oil pump, both be within the protection scope of the present invention.
It further include multi-way valve 6 to realize the accurate control to fuel feeding, two oil inlets of multi-way valve 6 are respectively communicated with tooth
One of the delivery outlet of wheel pump 4 and the second delivery outlet of duplex pump 2, the oil inlet connection multi-way valve 6 being connected to gear pump 4 is fuel-displaced
Mouthful, this oil outlet is directly connected to raising oil circuit 7, in addition the oil inlet being connected to duplex pump 2 is paid in 6 inner part of multi-way valve
Two oil outlets, a connection raising oil circuit 7, another connection turn to oil circuit 8.It can also be real by the internal structure of multi-way valve 6
Now to the control of hydraulic oil flow direction, guarantee that the mode of hydraulic oil as required flows, therefore multi-way valve 6 can change for multichannel
To valve, the control of raising or steering is realized at multi-way valve 6, multi-way valve 6 can also be simple on-off shut-off valve, in each branch
Corresponding control valve is set.
It is possible to further be provided with overflow valve between raising oil circuit 7 in 2 second delivery outlet of duplex pump, only when double
When connection 2 second delivery outlets of pump export enough pressure, overflow valve could be passed through to 7 fuel feeding of raising oil circuit.
In the hydraulic control system that specific embodiment of the present invention provides, gear pump 4 and duplex pump 2 passed through
Filter is connected to fuel tank, guarantees equipment safety and reliability.Meanwhile it turning to and being provided with check valve in parallel between oil circuit 8 and fuel tank
And filter.Other oil circuits may also set up corresponding component connection fuel tank, can also be directly connected to certainly.
It further include for detecting the first oil pump on the basis of the hydraulic control system that above-mentioned each specific embodiment provides
The detector of operating current, communication detector connects Electronic Control Assembly 5, when the operating current of detector acquisition is greater than preset value, electricity
Control assembly 5 can control the second pump start, and when the operating current of detector acquisition is less than preset value, Electronic Control Assembly 5 can be controlled
Make the stopping of the second oil pump.
Specific work process are as follows: when fork truck starting, Electronic Control Assembly 5 starts the work of first motor 1 first, drives duplex pump
2 work, 2 second output oil port connection of duplex pump turn to oil circuit 8, and the first output oil port connection brake circuit 9, fork truck can be just at this time
Often drive.When fork truck carries out raising work, turns to the oil liquid having more in oil circuit 8 and adjusted by multi-way valve 6, into raising oil circuit
7, the discharge capacity of duplex pump 2 increases, and the load of first motor 1 increases, and then electric current increases, when Electronic Control Assembly 5 detects that electric current reaches
When to preset value, start the second motor 3, gear pump 4 is driven to work, provides more sufficient oil hydraulic power for raising oil circuit 7.When complete
After working at raising, workload is reduced, and electric current reduces, and when Electronic Control Assembly 5 detects electric current down to preset value, closes second
Motor 3, gear pump 4 stop working, and maintain oil liquid required for fork truck normal driving as duplex pump 2.
The working condition that other kinds of detection obtains the first oil pump can also be used, speed probe is such as set, flow passes
Sensor or pressure sensor etc., both are within the protection scope of the present invention.
In addition to above-mentioned hydraulic control system, it includes above-mentioned hydraulic control that specific embodiment of the present utility model, which also provides a kind of,
The electri forklift of system processed, refer to the prior art for the structure of other each sections of the electri forklift, and repeats no more herein.
Electri forklift provided by the utility model and its hydraulic control system are described in detail above.Herein
Specific case is applied to be expounded the principles of the present invention and embodiment, the explanation of above example is only intended to
Help understands the method and its core concept of the utility model.It should be pointed out that coming for those skilled in the art
It says, without departing from the principle of this utility model, several improvements and modifications can be made to this utility model, these change
Into in the protection scope for also falling into the utility model claims with modification.
Claims (8)
1. a kind of hydraulic control system of electri forklift, which is characterized in that including the first oil pump, the second oil pump, for driving the
The delivery outlet of the first motor (1) of one oil pump and the second motor (3) for driving the second oil pump, first oil pump connects system
Dynamic oil circuit (9), oil circuit (8) and raising oil circuit (7) are turned to, the delivery outlet of second oil pump connects raising oil circuit (7), further includes
The Electronic Control Assembly (5) of the first motor (1) and second motor (3) is communicated to connect, the Electronic Control Assembly (5) being capable of basis
The start and stop of second motor (3) described in the working state control of the first motor (1).
2. hydraulic control system according to claim 1, which is characterized in that first oil pump is specially duplex pump (2),
First delivery outlet of the duplex pump (2) connects the brake circuit (9), and the second delivery outlet of the duplex pump (2) connects institute
It states steering oil circuit (8) and the raising oil circuit (7), second oil pump is specially gear pump (4).
3. hydraulic control system according to claim 2, which is characterized in that further include multi-way valve (6), the multi-way valve
(6) two oil inlets are respectively communicated with the delivery outlet of the gear pump (4) and the second delivery outlet of the duplex pump (2), described
The oil outlet of multi-way valve (6) is respectively communicated with the raising oil circuit (7) and the steering oil circuit (8), and the multi-way valve (6) can incite somebody to action
The hydraulic oil of (2) second delivery outlet of the duplex pump output inputs the raising oil circuit (7) and the steering oil circuit (8) respectively.
4. hydraulic control system according to claim 3, which is characterized in that (2) second delivery outlet of duplex pump to institute
It states and is provided with overflow valve between raising oil circuit (7).
5. hydraulic control system according to claim 4, which is characterized in that the gear pump (4) and the duplex pump (2)
Fuel tank is connected to by filter.
6. hydraulic control system according to claim 5, which is characterized in that the steering oil circuit (8) and the fuel tank it
Between be provided in parallel check valve and filter.
7. according to claim 1 to hydraulic control system described in 6 any one, which is characterized in that further include for detecting the
The detector of one operation of oil pump electric current, the communication detector connect the Electronic Control Assembly (5), the detector acquisition it is described
When operating current is greater than preset value, the Electronic Control Assembly (5) can control second pump start, the detector acquisition
When the operating current is less than preset value, the Electronic Control Assembly (5) can control second oil pump and stop.
8. a kind of electri forklift, including hydraulic control system, which is characterized in that the hydraulic control system is specially claim
Hydraulic control system described in 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821343392.1U CN208595123U (en) | 2018-08-20 | 2018-08-20 | Electri forklift and its hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821343392.1U CN208595123U (en) | 2018-08-20 | 2018-08-20 | Electri forklift and its hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208595123U true CN208595123U (en) | 2019-03-12 |
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ID=65605131
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821343392.1U Active CN208595123U (en) | 2018-08-20 | 2018-08-20 | Electri forklift and its hydraulic control system |
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| Country | Link |
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| CN (1) | CN208595123U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757651A (en) * | 2018-08-20 | 2018-11-06 | 杭叉集团股份有限公司 | Electri forklift and its hydraulic control system |
| CN113482730A (en) * | 2021-08-17 | 2021-10-08 | 宝武集团鄂城钢铁有限公司 | Oil supply device, control method and storage medium |
-
2018
- 2018-08-20 CN CN201821343392.1U patent/CN208595123U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757651A (en) * | 2018-08-20 | 2018-11-06 | 杭叉集团股份有限公司 | Electri forklift and its hydraulic control system |
| CN113482730A (en) * | 2021-08-17 | 2021-10-08 | 宝武集团鄂城钢铁有限公司 | Oil supply device, control method and storage medium |
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