CN214734194U - Forklift traveling system - Google Patents
Forklift traveling system Download PDFInfo
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- CN214734194U CN214734194U CN202022221141.XU CN202022221141U CN214734194U CN 214734194 U CN214734194 U CN 214734194U CN 202022221141 U CN202022221141 U CN 202022221141U CN 214734194 U CN214734194 U CN 214734194U
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Abstract
The utility model 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 utility model relates to a fork truck walking control technical field specifically is a fork truck 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.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fork truck traveling system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a 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 aspect of the present invention: the sensor part is in signal connection with the electronic controller through a sensor concentrator.
As a further aspect of the present invention: the execution part comprises an instrument desk display and an engine controller.
As a further aspect of the present 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 aspect of the present 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 aspect of the present 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 aspect of the present 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 aspect of the present 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 braking electromagnetic valve is a normally open electromagnetic valve.
As a further aspect of the present 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 beneficial effects of the utility model are 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 excessively controls the inching function, the temperature of transmission oil is too high, friction plates of a forward clutch and a backward clutch in the gearbox can be automatically separated, so that the friction plates are switched to a neutral gear, 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 described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1-3, in an embodiment of the present invention, a forklift traveling system, including sensor portion 1 arranged on a forklift and electronic controller 2 connected with signal of sensor portion 1, sensor portion 1 is connected with electronic controller 2 through sensor concentrator 4, electronic controller 2 signal is connected with executive portion 3, executive portion 3 includes forklift braking system, forklift speed change system, instrument desk display, engine controller, show forklift real-time status through instrument desk display, the operation of engine ECU control engine is through engine controller so as to control the power of forklift.
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 braking electromagnetic valve is a normally open electromagnetic valve, the parking braking electromagnetic valve is a normally open valve, the parking braking electromagnetic valve is closed during driving, and a friction plate is separated by the oil pressure of the braking oil cylinder; 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 11 and a forward clutch 17 connected with the forklift forward fast proportional valve 18, 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.
The utility model discloses when using, fork truck traveling system uses the electronic control mode operation, through sensor monitoring gearbox transmission shaft output speed, accelerator pedal angle, brake pedal angle, fine motion pedal angle, gearbox oil temperature, driver seat state, safety belt hasp state and automobile body gesture for fork truck, through control fine motion proportional valve, parking braking, the proportional valve that gos forward, the proportional valve of backing a car and engine ECU, manipulates fork truck's braking system, speed change system.
When needs electronics are shifted, the driver switches fast as required when fork truck goes, the position of keeping off slowly, can stir the fast that is located the instrument desk, keep off the action bars slowly, traveling system detects behind the action bars switching signal of shifting, electronic controller can detect speed sensor, parking braking sensor, if parking system is in release state and fork truck speed satisfies the condition of shifting, the system is according to predetermineeing the corresponding forward of optimal scheme of shifting by control, retreat the proportional valve, make the interior fast of gearbox, keep off the clutch friction disc slowly and carry out corresponding combination and separation, thereby reduce the driver and shift when the moment of feeling of contuse.
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 transmission case is switched to a neutral gear, and the service life of the transmission case is protected and prolonged.
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 brake system has the advantages that the parking brake system has the auxiliary function of the ramp, the forklift does not need manual brake of a driver after parking on the ramp, the central controller enables the drive axle parking brake electromagnetic valve to work when detecting that the forklift is braked on the ramp 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 is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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 as claimed in claim 1, wherein said sensor part (1) is in signal connection with said electronic controller (2) 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 braking 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 |
|---|---|---|---|
| CN202022221141.XU CN214734194U (en) | 2020-09-30 | 2020-09-30 | Forklift traveling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022221141.XU CN214734194U (en) | 2020-09-30 | 2020-09-30 | Forklift traveling system |
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| CN214734194U true CN214734194U (en) | 2021-11-16 |
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| CN202022221141.XU Active CN214734194U (en) | 2020-09-30 | 2020-09-30 | Forklift traveling system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112249981A (en) * | 2020-09-30 | 2021-01-22 | 安徽合力股份有限公司 | Forklift traveling system |
| CN114233701A (en) * | 2021-12-29 | 2022-03-25 | 采埃孚合力传动技术(合肥)有限公司 | Hydraulic transmission system controlled by electro-hydraulic proportional valve |
| CN115231477A (en) * | 2022-08-31 | 2022-10-25 | 安徽合力股份有限公司 | Forklift active braking control method and system based on power gear shifting transmission |
| 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 |
| CN112249981B (en) * | 2020-09-30 | 2024-10-22 | 安徽合力股份有限公司 | Fork truck traveling system |
-
2020
- 2020-09-30 CN CN202022221141.XU patent/CN214734194U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112249981A (en) * | 2020-09-30 | 2021-01-22 | 安徽合力股份有限公司 | Forklift traveling system |
| CN112249981B (en) * | 2020-09-30 | 2024-10-22 | 安徽合力股份有限公司 | Fork truck traveling system |
| CN114233701A (en) * | 2021-12-29 | 2022-03-25 | 采埃孚合力传动技术(合肥)有限公司 | Hydraulic transmission system controlled by electro-hydraulic proportional valve |
| CN115231477A (en) * | 2022-08-31 | 2022-10-25 | 安徽合力股份有限公司 | Forklift active braking control method and system based on power gear shifting transmission |
| CN115231477B (en) * | 2022-08-31 | 2024-05-14 | 安徽合力股份有限公司 | Forklift active braking control method and system based on power shift transmission |
| 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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