CN112249981A - Forklift traveling system - Google Patents
Forklift traveling system Download PDFInfo
- Publication number
- CN112249981A CN112249981A CN202011064139.4A CN202011064139A CN112249981A CN 112249981 A CN112249981 A CN 112249981A CN 202011064139 A CN202011064139 A CN 202011064139A CN 112249981 A CN112249981 A CN 112249981A
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- forklift
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- transmission
- braking
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- 230000005540 biological transmission Effects 0.000 claims abstract description 72
- 230000008859 change Effects 0.000 claims abstract description 20
- 230000002441 reversible effect Effects 0.000 claims abstract description 16
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 110
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 239000010720 hydraulic oil Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000009347 mechanical transmission Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07509—Braking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Regulating Braking Force (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a forklift walking system, which comprises a sensor part arranged on a forklift and an electronic controller in signal connection with the sensor part, wherein the electronic controller is in signal connection with an execution part which comprises a forklift braking system and a forklift speed change system; the forklift speed change system comprises a forklift hydraulic transmission box and a speed change operation oil way arranged in the forklift hydraulic transmission, the speed change operation oil way comprises a transmission oil pump, the transmission oil pump is connected with a forklift forward oil way, a forklift reverse oil way and a micro proportional valve connected to the oil outlet of the transmission oil pump, the micro proportional valve is arranged in the transmission oil way, a micro pedal and a hydraulic oil temperature sensor can be detected in the forklift operation process, an electronic controller controls the micro proportional valve and a brake system to reduce the speed of a vehicle, the micro function is limited to be excessively used, if the temperature of transmission oil is too high, forward and reverse clutch friction plates in the transmission box can be automatically separated, and the forklift is quitted from micro running.
Description
Technical Field
The invention relates to the technical field of forklift traveling control, in particular to a forklift traveling system.
Background
At present fork truck can increase the configuration through the customization and acquire multiple functions, but contact between each function is relatively weak, lacks unified cooperation, leads to fork truck function many and can't exert best effect by force.
The existing forklift mainly has mechanical transmission and hydraulic transmission, the mechanical transmission utilizes a friction clutch to cut off or transmit the power of an engine to a gearbox and a drive axle, the mode has simple structure and high reliability, but a driver is required to have higher driving level, and the clutch is controlled for a long time to lead the driver to be tired. The hydraulic transmission realizes the functions of power on-off, reversing and speed changing through a hydraulic torque converter and a gearbox. The hydraulic transmission forklift has a jogging function and can be controlled by a driver stepping on a jogging pedal, the forklift only can slowly advance or brake in time no matter how the driver steps on the accelerator pedal in a jogging state, and the lifting speed of the fork can be greatly increased along with the stepping amplitude of the accelerator pedal. The jog function improves accuracy and reduces operator handling complexity when stacking forklifts.
The existing hydraulic transmission bridge has the following defects: the existing jogging function control mode is mechanical control, inevitable abrasion exists, and a jogging control mechanism fails after being used for a long time, so that the forklift loses the jogging function; and the driver uses the fine motion function for a long time, and the existing hydraulic transmission has no automatic protection device, so that the service life of the transmission mechanism is reduced, and the maintenance difficulty is high.
Disclosure of Invention
The invention aims to provide a forklift traveling system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a forklift traveling system comprises a sensor part arranged on a forklift and an electronic controller in signal connection with the sensor part, wherein the electronic controller is in signal connection with an execution part which comprises a forklift braking system and a forklift speed change system;
the forklift speed change system comprises a forklift hydraulic transmission box and a speed change control oil way arranged in the forklift hydraulic transmission, the speed change control oil way comprises a transmission oil pump, the transmission oil pump is connected with a forklift forward oil way, a forklift reverse oil way and a micro-motion proportional valve connected to an oil outlet of the transmission oil pump, the forklift forward oil way comprises a forklift forward slow oil way and a forklift forward fast oil way which are connected in parallel, the forklift forward fast oil way comprises a forklift forward slow proportional valve connected with an oil outlet of the transmission oil pump and a forward clutch connected with the forklift forward slow proportional valve, and the forklift forward slow oil way comprises a forklift forward fast proportional valve connected with the oil outlet of the transmission oil pump and a forward clutch connected with the forklift forward fast proportional valve.
As a further scheme of the invention: the sensor part is in signal connection with the electronic controller through a sensor concentrator.
As a further scheme of the invention: the execution part comprises an instrument desk display and an engine controller.
As a further scheme of the invention: the sensor part comprises a speed sensor, an accelerator pedal angle sensor, a brake pedal angle sensor, a micro pedal angle sensor, a gearbox oil temperature sensor, a seat sensor, a safety belt sensor and a vehicle body attitude sensor.
As a further scheme of the invention: the speed sensor is located the hydraulic transmission output shaft, accelerator pedal angle sensor, brake pedal angle sensor, micro-motion pedal angle sensor are located throttle, braking, micro-motion pedal below respectively, inside the gearbox was arranged in to hydraulic transmission oil temperature sensor, inside the seat was arranged in to the seat sensor, the safety belt sensor was arranged in the safety belt jack, automobile body attitude sensor is fixed in the frame.
As a further scheme of the invention: the forklift braking system comprises a braking oil path, the braking oil path comprises a braking oil tank, a braking oil pump, a braking electromagnetic valve and a brake which are sequentially communicated, and an oil outlet of the braking oil pump is connected with a braking oil path overflow valve.
As a further scheme of the invention: an oil inlet of the transmission oil pump is connected with a transmission oil tank, and an oil outlet of the transmission oil pump is connected with a variable speed oil way overflow valve.
As a further scheme of the invention: the forklift braking system comprises a parking braking oil path, the parking braking oil path comprises a braking oil tank, a parking braking oil pump, a parking braking electromagnetic valve and a parking brake which are sequentially communicated, and the parking electromagnetic valve is a normally open electromagnetic valve.
As a further scheme of the invention: the forklift reversing oil way comprises a reversing proportional solenoid valve connected with an oil outlet of the transmission oil pump and a reversing clutch connected with the reversing proportional solenoid valve.
Compared with the prior art, the invention has the beneficial effects that: the application of the hydraulic forklift is that a micro proportional valve is arranged in an oil way of a transmission, a micro pedal and a hydraulic oil temperature sensor are detected in the running process of the forklift, an electronic controller controls the micro proportional valve and a brake system, a service brake system in the brake system provides partial brake to reduce the speed of the forklift, meanwhile, a part of high-pressure oil of the transmission at the transmission oil pump flows back from the micro proportional valve through the micro proportional valve, further reducing the oil pressure in the speed change control oil way to achieve the purposes of reducing the transmission power of the speed changer, reducing the output of the speed changer and reducing the speed of the vehicle, and the running system can limit the excessive use of the micro-motion function, if the driver controls the inching function excessively, the temperature of transmission oil is too high, friction plates of a forward clutch and a reverse clutch in the gearbox are automatically separated, and therefore the friction plates are switched to a neutral position, the gearbox is protected, and the service life of the gearbox is prolonged.
Drawings
FIG. 1 is a schematic block diagram of the present embodiment;
FIG. 2 is a brake oil path diagram according to the embodiment;
fig. 3 is a shift operation oil path diagram of the present embodiment.
In the figure: the system comprises a transmission part 1, an electronic controller 2, an execution part 3, a sensor concentrator 4, a brake oil tank 5, a brake oil pump 6, a brake electromagnetic valve 7, a brake oil way overflow valve 8, a brake 9, a transmission oil tank 10, a transmission oil pump 11, a transmission oil way overflow valve 12, a micro-motion proportional valve 13, a reverse ratio electromagnetic valve 14, a reverse clutch 15, a forward slow speed ratio electromagnetic valve 16, a forward clutch 17 and a forward fast ratio electromagnetic valve 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, in an embodiment of the present invention, a forklift truck traveling system includes a sensor portion 1 disposed on a forklift truck and an electronic controller 2 in signal connection with the sensor portion 1, the sensor portion 1 is connected with the electronic controller 3 through a sensor hub 4, the electronic controller 2 is connected with an execution portion 3 through a signal, the execution portion 3 includes a forklift truck braking system, a forklift truck speed change system, an instrument desk display and an engine controller, a real-time status of the forklift truck is displayed through the instrument desk display, and an engine controller, i.e., an engine ECU, controls operation of an engine so as to control power of the forklift truck.
The sensor part 1 is used for collecting the running state of a vehicle, the sensor part 1 comprises a speed sensor, an accelerator pedal angle sensor, a brake pedal angle sensor, a micro pedal angle sensor, a gearbox oil temperature sensor, a seat sensor, a safety belt sensor and a vehicle body posture sensor, the speed sensor is positioned at an output shaft of a hydraulic gearbox and converts the rotating speed of the output shaft into the vehicle speed; the accelerator pedal angle sensor, the brake pedal angle sensor and the inching pedal angle sensor are respectively positioned below the accelerator pedal, the brake pedal and the inching pedal and used for detecting the treading amplitude of the three pedals; the hydraulic transmission oil temperature sensor is arranged in the transmission and used for detecting the temperature of transmission oil; the seat sensor is arranged in the seat and used for monitoring the state of a forklift driver; the safety belt sensor is arranged in the safety belt jack and used for monitoring the connection state of the safety belt; the vehicle body attitude sensor is fixed on the frame and used for detecting the attitude of the forklift so as to judge whether the forklift is positioned on the ramp or not; the electronic controller is fixed in the instrument desk and is communicated with the sensor part, the gearbox and the instrument desk display screen through a CAN bus.
The electronic controller is composed of a single chip microcomputer, a controller power supply and an isolation circuit, is a common controller in the field, and is not described herein again.
The forklift braking system comprises a braking oil path, the braking oil path comprises a braking oil tank 5, a braking oil pump 6, a braking electromagnetic valve 7 and a brake 9 which are sequentially communicated, an oil outlet of the braking oil pump 6 is connected with a braking oil path overflow valve 8, in addition, the forklift braking system also comprises a parking braking oil path, the parking braking oil path comprises a braking oil tank, a parking braking oil pump, a parking braking electromagnetic valve and a parking brake which are sequentially communicated, the parking electromagnetic valve is a normally open electromagnetic valve, the parking electromagnetic valve is a normally open valve, the parking electromagnetic valve is closed when the forklift is in service, and the friction plates are separated by the; when parking, there is no oil pressure in the brake cylinder, and the friction plate is expanded by the spring to brake.
The forklift speed change system comprises a forklift hydraulic transmission and a speed change operation oil way arranged in the forklift hydraulic transmission, the speed change operation oil way comprises a transmission oil pump 11, an oil inlet of the transmission oil pump 11 is connected with a transmission oil tank 10, an oil outlet of the transmission oil pump 11 is connected with a speed change oil way overflow valve 12, the transmission oil pump 11 is connected with a forklift forward oil way, a forklift reverse oil way and a micro-motion proportional valve 13 connected at the oil outlet of the transmission oil pump, the forklift forward oil way comprises a forklift forward slow speed oil way and a forklift forward fast oil way which are connected in parallel, the forklift forward fast oil way comprises a forklift forward slow speed ratio proportional valve 16 connected with the oil outlet of the transmission oil pump 11 and a forward clutch 17 connected with the forklift forward slow speed proportional valve 16, the forklift forward slow speed oil way comprises a forklift forward fast proportional valve 18 connected with the oil outlet of the transmission oil pump, the forklift reversing oil path comprises a reversing proportional solenoid valve 14 connected with an oil outlet of the transmission oil pump 11 and a reversing clutch 15 connected with the reversing proportional solenoid valve 14.
When the forklift truck is used, the forklift truck walking system runs in an electronic control mode, the output speed of a transmission shaft of a gearbox, the angle of an accelerator pedal, the angle of a brake pedal, the angle of a inching pedal, the oil temperature of the gearbox, the state of a driver seat, the locking state of a safety belt and the posture of a truck body are monitored by a sensor for the forklift truck, and the brake system and the speed change system of the forklift truck are controlled by controlling a inching proportional valve, a parking brake, a forward proportional valve, a reverse proportional valve and an engine ECU.
When electronic gear shifting is needed, if a driver needs to switch the fast gear and the slow gear when the forklift runs, the driver can toggle the fast gear operating rod and the slow gear operating rod which are positioned on an instrument desk, after a walking system detects a gear shifting operating rod switching signal, an electronic controller can detect a speed sensor and a parking braking sensor, if the parking system is in a release state and the speed of the forklift meets a gear shifting condition, the system correspondingly combines and separates fast gear and slow gear clutch friction plates in a gearbox according to a preset optimal gear shifting scheme by a controlled corresponding forward and backward proportional valve, and therefore the jerking feeling of the driver during gear shifting is reduced.
When the vehicle side needs to be flexibly reversed, when a driver quickly operates the gear lever between forward and backward, the forward and backward flexible switching is realized through the electronic controller, so that the direction of the forklift is stably changed, the tire slip is reduced, the service life of the tire is prolonged, and the driving comfort is improved.
In the process of electronic inching control, a running system can detect a inching pedal and a hydraulic oil temperature sensor after being started, an electronic controller 2 controls an inching proportional valve 13 and a brake system, a part of brake is provided by a service brake system in the brake system to reduce the vehicle speed, meanwhile, a part of high-pressure oil of a transmission at a pump of a transmission oil pump 11 flows back from the inching proportional valve 13 through the inching proportional valve 13, and further the oil pressure in a speed change control oil way is reduced, so that the power of transmission is reduced, the output of the transmission is reduced, the vehicle speed is reduced, the running system can limit the excessive use of an inching function, if a driver excessively controls the inching function, the temperature of the transmission oil is too high, friction plates of a forward clutch and a backward clutch in a transmission case can be automatically separated, and therefore, the neutral position is switched, and the.
During the running process of the forklift, the system can detect signals of an accelerator and a micro pedal, and when a driver does not step on the two pedals during running, a deceleration signal is sent to an engine ECU to reduce the fuel supply amount, so that the forklift is automatically decelerated, and then a braking system automatically intervenes to stop the forklift, thereby saving fuel, increasing safety and achieving the function of automatic deceleration control.
The parking system has the advantages that the parking system has the slope auxiliary function, the forklift does not need manual braking of a driver after parking on a slope, the central controller enables the drive axle parking electromagnetic valve to work when detecting that the forklift is braked on the slope through the speed sensor and the vehicle body attitude sensor, and the forklift automatically enters a parking state. When the driver needs to release the auxiliary brake, the parking brake is automatically released only by stepping on the accelerator pedal until the driving torque generated by the engine is enough to overcome the torque required by the slope slipping.
The protection function is operated, the locking state of the safety belt can be detected in the running process of the forklift, only after the system confirms that a driver fastens the safety belt, the central controller can enable the forward or reverse proportional valve to normally operate, the clutch is shifted into a forward or reverse gear from a neutral gear, and meanwhile, the brake electromagnetic valve is controlled to release the brake state; if the driver does not tie the safety belt or the brake system in the drive axle cannot be loosened, the forward or reverse proportional valve cannot work along with the operating lever, and the forklift cannot run. And will detect the seat sensor, even if the driver leaves the seat in the event of the engine starting, the central controller will signal the engine ECU to shut off the fuel supply, causing the engine to stop. The brake solenoid valve will also automatically enter into operation so that the forklift will automatically park.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The forklift walking system is characterized by comprising a sensor part (1) arranged on a forklift and an electronic controller (2) in signal connection with the sensor part (1), wherein the electronic controller (2) is in signal connection with an execution part (3), and the execution part (3) comprises a forklift braking system and a forklift speed change system;
the forklift speed change system comprises a forklift hydraulic transmission box and a speed change control oil way arranged in the forklift hydraulic transmission, the speed change control oil way comprises a transmission oil pump (11), the transmission oil pump (11) is connected with a forklift forward oil way, a forklift reverse oil way and a micro proportional valve (13) connected at an oil outlet of the transmission oil pump, the forklift advancing oil way comprises a forklift advancing slow oil way and a forklift advancing fast oil way which are connected in parallel, the forklift forward fast oil way comprises a forklift forward slow speed ratio proportional valve (16) connected with an oil outlet of the transmission oil pump (11) and a forward clutch (17) connected with the forklift forward slow speed ratio proportional valve (16), the forklift forward slow speed oil way comprises a forklift forward fast proportional valve (18) connected with an oil outlet of the transmission oil pump (11) and a forward clutch (17) connected with the forklift forward fast proportional valve (18).
2. A forklift running system according to claim 1, characterised in that the sensor part (1) is connected to the electronic controller signals (3) via a sensor hub (4).
3. A forklift running system according to claim 1, wherein said implement part (3) comprises an instrument desk display, an engine controller.
4. A forklift running system according to claim 1, wherein said sensor section (1) includes a speed sensor, an accelerator pedal angle sensor, a brake pedal angle sensor, a micro pedal angle sensor, a transmission oil temperature sensor, a seat belt sensor, and a vehicle body attitude sensor.
5. The forklift running system of claim 4, wherein the speed sensor is located at the output shaft of the hydraulic transmission, the accelerator pedal angle sensor, the brake pedal angle sensor and the inching pedal angle sensor are respectively located below an accelerator pedal, a brake pedal and a inching pedal, the oil temperature sensor of the hydraulic transmission is arranged inside the transmission, the seat sensor is arranged inside a seat, the safety belt sensor is arranged in a safety belt insertion hole, and the vehicle body posture sensor is fixed on a vehicle frame.
6. The forklift traveling system according to claim 1, wherein the forklift braking system comprises a braking oil path, the braking oil path comprises a braking oil tank (5), a braking oil pump (6), a braking electromagnetic valve (7) and a brake (9) which are sequentially communicated, and an oil outlet of the braking oil pump (6) is connected with a braking oil path overflow valve (8).
7. The forklift running system of claim 1, wherein an oil inlet of the transmission oil pump (11) is connected with a transmission oil tank (10), and an oil outlet of the transmission oil pump (11) is connected with a variable speed oil way overflow valve (12).
8. The forklift traveling system according to claim 1, wherein the forklift braking system includes a parking braking oil path, the parking braking oil path includes a braking oil tank, a parking braking oil pump, a parking braking solenoid valve, and a parking brake that are sequentially communicated, and the parking solenoid valve is a normally open solenoid valve.
9. A forklift running system according to claim 1, wherein said forklift reverse oil circuit comprises a reverse proportional solenoid valve (14) connected to an oil outlet of a transmission oil pump (11) and a reverse clutch (15) connected to said reverse proportional solenoid valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011064139.4A CN112249981A (en) | 2020-09-30 | 2020-09-30 | Forklift traveling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011064139.4A CN112249981A (en) | 2020-09-30 | 2020-09-30 | Forklift traveling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112249981A true CN112249981A (en) | 2021-01-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011064139.4A Pending CN112249981A (en) | 2020-09-30 | 2020-09-30 | Forklift traveling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112249981A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816307A (en) * | 2021-09-23 | 2021-12-21 | 山推工程机械股份有限公司 | Vehicle micro-motion control system, vehicle and vehicle micro-motion control method |
| CN114436173A (en) * | 2022-01-07 | 2022-05-06 | 合肥工业大学 | Forklift hydraulic transmission system and forklift transmission control system |
| CN115560065A (en) * | 2022-10-24 | 2023-01-03 | 安徽合力股份有限公司 | Gear shifting system and method based on bus technology |
| CN117602544A (en) * | 2024-01-22 | 2024-02-27 | 杭叉集团股份有限公司 | Multi-mode forklift mast descending device and control method thereof |
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| CN1966998A (en) * | 2006-10-14 | 2007-05-23 | 仲伟胜 | Continuously-variable electrohydraulic control valve for use in 4-4.5 ton forklift |
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| CN1966998A (en) * | 2006-10-14 | 2007-05-23 | 仲伟胜 | Continuously-variable electrohydraulic control valve for use in 4-4.5 ton forklift |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816307A (en) * | 2021-09-23 | 2021-12-21 | 山推工程机械股份有限公司 | Vehicle micro-motion control system, vehicle and vehicle micro-motion control method |
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| CN117602544A (en) * | 2024-01-22 | 2024-02-27 | 杭叉集团股份有限公司 | Multi-mode forklift mast descending device and control method thereof |
| CN117602544B (en) * | 2024-01-22 | 2024-03-22 | 杭叉集团股份有限公司 | Multi-mode forklift mast descending device and control method thereof |
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