CN102730604A - Tandem hybrid fork lift truck - Google Patents
Tandem hybrid fork lift truck Download PDFInfo
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- CN102730604A CN102730604A CN2012102017332A CN201210201733A CN102730604A CN 102730604 A CN102730604 A CN 102730604A CN 2012102017332 A CN2012102017332 A CN 2012102017332A CN 201210201733 A CN201210201733 A CN 201210201733A CN 102730604 A CN102730604 A CN 102730604A
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- 238000005381 potential energy Methods 0.000 claims abstract description 25
- 230000005611 electricity Effects 0.000 claims abstract description 15
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- 238000004146 energy storage Methods 0.000 claims description 64
- 238000004804 winding Methods 0.000 claims description 20
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
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Abstract
The invention provides a tandem hybrid fork lift truck. The tandem hybrid fork lift truck comprises an electric energy providing device, a rectifier, a walking motor, a lifting motor and an electric energy storing device, wherein after alternating current which is provided by the electric energy providing device flows through the rectifier, the electric energy providing device is connected in parallel with the electric energy storing device; after the electric energy providing device is connected in parallel with the electric energy storing device, the output end is collected with the walking motor and/or the lifting motor; the electric energy storing device can be charged to store electric energy and also can discharge to use the stored electric energy; both the walking motor and the lifting motor are generator-motor dual-purpose motors; a driving axle and tyres can drive the walking motor to generate electricity during braking, so that braking energy is converted into electric energy; and under the action of heavy objects, a lifting appliance can drive the lifting motor to generate electricity, so that the potential energy of the heavy objects is converted into electric energy. By the technical scheme of the invention, the potential energy of a falling gantry is converted into the electric energy and stored to ensure that the potential energy is recycled; the braking energy is also recycled during braking; and the tandem hybrid fork lift truck is easy to control and environment-friendly and has small shock at the moment of startup and shutdown.
Description
Technical Field
The invention relates to a forklift, in particular to a tandem type hybrid power forklift.
Background
The empty container stacking machine is a kind of operation equipment for periodically carrying and stacking containers, and needs to frequently start braking and lift the containers up and down during working. In the existing fork lift truck, generally, when a lifting appliance is used for lifting operation, the lifting appliance, an inner portal frame and a container are lifted to a certain height through a lifting oil cylinder; in the descending process of the lifting appliance, the descending speed of the lifting appliance is controlled by adjusting the opening of the control valve, the descending of the lifting appliance is stopped by closing the control valve, most potential energy is consumed uselessly in the descending process of the lifting appliance, the potential energy is not recycled, the energy waste is serious, the descending of the lifting appliance is controlled through a simple throttling opening, and the system generates heat seriously; in addition, in the operation engineering of the stacking machine, the whole vehicle is frequently started, so that the efficiency of the engine is low, and the running oil consumption is high.
Therefore, the development of an energy-saving stacking machine is needed, namely the gantry gravitational potential energy and the braking energy of the stacking machine can be recovered. At present, the gravitational potential energy of the portal frame is mainly recovered by adopting a hydraulic mode, but a plurality of defects still exist.
The existing stacking machine has the following main energy-saving modes and defects:
1) the potential energy of the falling of the heavy objects such as the lifting appliance drives the hydraulic motor to store the energy to the energy accumulator. According to the method, as the hydraulic transmission efficiency is low, the energy recovered by the energy accumulator is less, and the energy is difficult to stably store in the energy accumulator along with the change of parameters such as pressure, temperature and the like of the characteristic of the energy accumulator, which is a difficult problem which is not solved by the energy recovery mode;
2) the potential energy of heavy objects such as a lifting appliance and the like which are reduced drives a hydraulic motor, a hydraulic motor and a generator set are connected in series on an oil return path of a movable arm hydraulic cylinder, the generator is driven by the hydraulic motor to recover the potential energy, and the generator works in a low-efficiency area due to the fact that the recovery time is short and the pressure fluctuation of hydraulic oil is large in the recovery process, and the energy recovery efficiency is low, which is the main defect of the energy recovery mode.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present invention provides a tandem type hybrid forklift.
The invention provides a series hybrid power forklift which comprises an electric energy supply device, a rectifier, an electric energy storage device, a walking motor and a lifting motor; the alternating current provided by the electric energy providing device is converted into direct current by the rectifier and then is connected with the electric energy storage device in parallel, and the output end after the parallel connection is connected with the walking motor and/or the lifting motor; when the voltage at two ends of the electric energy storage device is higher than the electromotive voltage of the electric energy storage device, the electric energy storage device is charged and stores electric energy; when the voltage across the electrical energy storage device is lower than the electromotive voltage of the electrical energy storage device, the electrical energy storage device discharges utilizing the stored electrical energy. The walking motor and the lifting motor are both generator-motor dual-purpose motors; the walking motor can drive the driving axle and the tires to walk, and the driving axle and the tires can drive the walking motor to generate electricity when the stacking machine brakes, so that braking energy is converted into electric energy; the lifting motor can drive the lifting appliance to work; when the lifting appliance descends under the action of potential energy of the weight, the lifting motor can be driven to generate electricity, and the potential energy of the weight is converted into electric energy.
In the technical scheme, the electric energy storage device is connected with the electric energy supply device in parallel, and can be charged when the voltage in the system is greater than the electromotive voltage of the electric energy storage device and discharged when the voltage in the system is less than the electromotive voltage of the electric energy storage device, so that redundant electric energy in the system can be stored and supplemented to the system when the electric energy of the system is insufficient, the aim of saving energy is fulfilled, and the energy saving of the forklift is realized. The potential energy generated when the gantry descends is converted into electric energy to be stored in the electric energy storage device, the potential energy recovery efficiency is high, energy is saved, the energy saving efficiency is high, and the motor can be driven to generate electricity and store the electricity into the electric energy storage device when the forklift is braked, so that the recovery of braking energy is realized, and the cost is reduced; the lifting motor is adopted to lift the portal frame and the lifting appliance, and compared with a lifting oil cylinder, the lifting oil cylinder is easy to control and more environment-friendly, and the impact of starting and stopping is small; in addition, the lifting member can be placed at the counterweight position of the forklift, thereby reducing the counterweight weight.
Preferably, the electric energy storage device is arranged on the walking motor and/or the lifting motor, and the electric energy storage device is arranged on the walking motor and/or the lifting motor and/or the electric energy supply device.
In the technical scheme, the inverter is added, so that the walking motor and/or the lifting motor can adopt an alternating current motor, the universality of the motor is improved, and the cost is reduced.
Preferably, the device also comprises a walking frequency converter and a lifting frequency converter; the walking frequency converter converts the direct current after the electric energy supply device and the electric energy storage device are connected in parallel into alternating current with controllable frequency and voltage to drive the walking motor to rotate; the lifting frequency converter converts the direct current after the electric energy providing device and the electric energy storage device are connected in parallel into alternating current with controllable frequency and voltage, and drives the lifting motor to rotate.
In the technical scheme, the walking frequency converter and the lifting frequency converter are adopted, direct current can be converted into alternating current with controllable voltage and frequency to respectively drive the walking motor and the lifting motor, the structure is simple, and control is facilitated.
Preferably, the electric energy supply device comprises a generator set mounted on the forklift and/or a commercial power supply system electrically connectable with the forklift. In the technical scheme, a single or simultaneous two electric energy supply mode is adopted, double guarantee is realized on power supply of the stacking machine, and the stacking machine can work more reliably.
Preferably, the electric energy storage device is a rechargeable battery, and the rechargeable battery is connected in parallel with the electric energy supply device through a direct current bus bar. The rechargeable battery is adopted as the electric energy storage device, so that the cost is low and the implementation is easy; the straight-line bus bars are adopted for parallel connection, the structure is reasonable, and the energy loss is small.
Preferably, the device further comprises a winding drum, a pull cable and a pull cable guide device; the lifting motor drives the winding drum, the winding drum drives the stay cable, and the stay cable is driven by the stay cable guide device to be installed on the inner gantry of the lifting appliance to be lifted. The hoisting mechanism is adopted to lift the lifting appliance and the inner gantry, and compared with a hydraulic system, the lifting appliance is simple in structure and convenient to maintain.
Preferably, the device further comprises a coupling, a brake and a speed reducer; the coupler, the brake and the speed reducer are sequentially arranged between the lifting motor and the winding drum; the power of the lifting motor is transmitted to the speed reducer, and the speed reducer drives the winding drum; the brake can control the suspension of the lifting appliance and the inner gantry. In the technical scheme, the coupler can play a role in buffering the starting and stopping of the gantry; the brake can be used for stopping the ascending or descending of the gantry and the lifting appliance when needed, and the gantry and the lifting appliance are in a hovering state.
Preferably, the guy cable guide mechanism comprises a first fixed pulley and a second fixed pulley, the first fixed pulley is mounted on a body of the fork lift truck, and the second fixed pulley is mounted on an outer gantry of the fork lift truck; the inner gantry is provided with a movable pulley; the guy cable is connected with the inner gantry through the movable pulley. The fixed pulley is adopted for guiding, the movable pulley is adopted for being connected with the inner gantry, labor can be saved, the efficiency is improved, the cost is low, and the implementation is easy.
Preferably, the traction cable comprises a steel cable; one end of the steel wire rope is fixedly connected with the winding drum, and after the steel wire rope winds the first fixed pulley, the second fixed pulley and the movable pulley, the other end of the steel wire rope is fixedly connected with the outer gantry of the forklift; or after the steel wire rope winds the first fixed pulley, the second fixed pulley and the movable pulley, two ends of the steel wire rope are fixedly connected and wound on the winding drum.
The stay cable adopts a steel wire rope, so that the structure is simple and easy to realize; and the two connecting and fixing modes of the steel wire rope can play roles in saving labor and improving efficiency.
In conclusion, the tandem type hybrid power stacking machine provided by the invention has the advantages that the potential energy generated when the gantry descends is converted into the electric energy to be stored in the electric energy storage device, the potential energy recovery efficiency is high, the energy is saved, the energy-saving efficiency is high, the motor can be driven to generate electricity and store the electricity into the electric energy storage device during braking, the braking energy recovery is realized, and the cost is reduced; the lifting motor is adopted to lift the portal frame and the lifting appliance, and compared with a lifting oil cylinder, the lifting oil cylinder is easy to control and more environment-friendly, and the impact of starting and stopping is small; in addition, the lifting system can be placed in a counterweight position, thereby reducing the counterweight weight and reducing the weight of the whole forklift.
Drawings
FIG. 1 is a functional block diagram of a series hybrid fork lift according to the present invention;
FIG. 2 is a front view of an embodiment of a tandem hybrid forklift according to the present invention;
fig. 3 is a top view of the fork lift truck of fig. 2.
Wherein, the corresponding relationship between each component and the reference numeral in fig. 1 to fig. 3 is:
1 generator set 2 walking motor 3 driving axle and tyre 5 lifting motor
6 reel 7 cable 8 electric energy storage device 9 walking converter
10 lift converter 11 rectifier 12 direct current and arrange 13 shaft coupling
14-brake 15-speed reducer 16 inner door frame 17 movable pulley
18 first fixed pulley 19 second fixed pulley 20 outer gantry 21 spreader.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present application may be combined with each other
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
FIG. 1 is a functional block diagram of a series hybrid fork lift according to the present invention; FIG. 2 is a front view of an embodiment of a tandem hybrid forklift according to the present invention; fig. 3 is a top view of the fork lift truck of fig. 2.
As shown in fig. 1, the present invention provides a series hybrid forklift including: the electric energy supply device, the rectifier 11, the electric energy storage device 8, the walking motor 2 and the lifting motor 5; alternating current provided by the electric energy providing device is converted into direct current by the rectifier 11 and then is connected with the electric energy storage device 8 in parallel, and the output end after the parallel connection is connected with the walking motor 2 and/or the lifting motor 5; when the voltage at the two ends of the electric energy storage device 8 is higher than the electromotive voltage of the electric energy storage device 8, the electric energy is charged by the electric energy storage device 8, and the electric energy is stored; when the voltage across the electrical energy storage device 8 is lower than the electromotive voltage of the electrical energy storage device 8, the electrical energy storage device 8 discharges, utilizing the stored electrical energy. Further, as shown in fig. 2 and 3, the walking motor 2 and the lifting motor 5 are both generator-motor dual-purpose motors; the traveling motor 2 can drive the driving axle and the tires 3 to travel, and the driving axle and the tires 3 can drive the traveling motor 2 to generate electricity when the stacking machine brakes so as to convert braking energy into electric energy; the lifting motor 5 can drive the lifting appliance 21 to work; when the lifting appliance 21 descends under the action of potential energy of the weight, the lifting motor 5 can be driven to generate electricity, and the potential energy of the weight is converted into electric energy.
In the above technical solution, the electric energy storage device 8 is connected in parallel with the electric energy providing device, and the electric energy storage device 8 can be charged when the voltage in the system is greater than the electromotive voltage thereof and can be discharged when the voltage in the system is less than the electromotive voltage thereof, so that the surplus electric energy in the system can be stored, and the surplus electric energy can be supplemented to the system when the electric energy in the system is insufficient, thereby achieving the purpose of energy saving and realizing the energy saving of the forklift. In the embodiment, the potential energy generated when the gantry 16 descends is converted into the electric energy to be stored in the electric energy storage device 8, the potential energy recovery efficiency is high, the energy is saved, the energy-saving efficiency is high, and the motor 2 can be driven to generate electricity and store the electricity into the electric energy storage device 8 when the vehicle is braked, so that the recovery of the braking energy is realized, and the cost is reduced; moreover, the lifting motor 5 is adopted to lift the gantry and the lifting appliance 21, and compared with a lifting oil cylinder, the lifting oil cylinder is easy to control and more environment-friendly, and the impact of starting and stopping is small; in addition, the lifting member can be placed at the counterweight position of the forklift, thereby reducing the counterweight weight.
The lifting motor 5 can be a double motor or a single motor; the walking motor 2 can adopt an alternating current traction motor, a direct current brushless motor and the like; the walking motor 2 can also be a double motor, a low-speed large-torque motor is used during climbing or starting, and the high-speed motor is switched after starting.
Preferably, the electric energy storage device further comprises an inverter capable of converting direct current into alternating current, the inverter is arranged between an output end of the electric energy supply device connected in parallel with the electric energy storage device 8 and the walking motor 2 and/or the lifting motor 5, and converts the direct current output by the electric energy supply device connected in parallel with the electric energy storage device 8 into alternating current to drive the walking motor 2 and/or the lifting motor 5. In the technical scheme, the inverter is added, so that the walking motor 2 and/or the lifting motor 5 can adopt an alternating current motor, the universality of the motor is improved, and the cost is reduced. Of course, the traveling motor 2 and/or the lifting motor 5 may also have a direct-to-alternating current conversion function, for example, a variable frequency motor, which can directly convert direct current into alternating current with available voltage and frequency for use.
Preferably, the device also comprises a walking frequency converter 9 and a lifting frequency converter 10; the walking frequency converter 9 converts the direct current after the electric energy supply device and the electric energy storage device 8 are connected in parallel into alternating current with controllable frequency and voltage, and drives the walking motor 2 to rotate; the lifting frequency converter 10 converts the direct current after the electric energy providing device and the electric energy storage device 8 are connected in parallel into alternating current with controllable frequency and voltage, and drives the lifting motor 5 to rotate.
In the technical scheme, the walking frequency converter 9 and the lifting frequency converter 10 are adopted, direct current can be converted into alternating current with controllable voltage and frequency to respectively drive the walking motor 2 and the lifting motor 5, the structure is simple, and control is facilitated. It should be understood by those skilled in the art that the traveling frequency converter 9 and the lifting frequency converter 10 both include an inverter circuit for converting dc power into ac power, and can convert dc power into ac power with controllable voltage and frequency, and certainly, other components with inverter circuits are also adopted, and after converting dc power output after being connected in parallel into ac power, the traveling motor 2 and/or the lifting motor 5 are driven.
Preferably, the electric energy supply device comprises a generator set 1 mounted on the forklift and/or a mains supply system electrically connectable with the forklift. In this embodiment, as shown in fig. 1, a generator set 1 is used as a power supply. In the technical scheme, two parts of power supplies are adopted for supplying power, so that the power supply of the forklift is doubly guaranteed, and the forklift works more reliably.
Preferably, the electric energy storage device 8 is a rechargeable battery, and the rechargeable battery is connected in parallel with a power supply through a dc bus bar 12. The rechargeable battery can be a lithium battery and also can be a nickel-hydrogen battery; the use of rechargeable batteries as electrical energy storage devices is easy to implement, low cost, and those skilled in the art will understand that: the electric energy storage device 8 may also be other charging and discharging devices such as a super capacitor. The straight-line bus bars are adopted for parallel connection, the structure is reasonable, and the energy loss is small.
In the above embodiment, as shown in fig. 1, the three-phase ac power generated by the generator set 1 is converted into dc power by the rectifier 11, and the dc power is converted into ac power with controllable frequency and voltage by the traveling frequency converter 9 and the lifting frequency converter 10, so as to drive the traveling motor 2 and the lifting motor 5. Connecting a battery 8 on a direct current bus in parallel, monitoring a voltage change range through a power management system, and when the voltage at two ends of the electric energy storage device 8 is higher than the electromotive voltage of the electric energy storage device 8, charging the electric energy storage device 8 to store the electric energy; when the voltage across the electrical energy storage device 8 is lower than the electromotive voltage of the electrical energy storage device 8, the electrical energy storage device 8 discharges, utilizing the stored electrical energy, facilitating the storage and utilization of the electrical energy; when the inner gantry 16 descends, the lifting motor 5 is driven to generate power and is stored in the battery 8 through the lifting frequency converter 10, so that the potential energy of the gantry is recovered; when the stacking machine brakes, the traveling motor 2 is driven to generate power, and then the power is stored in the battery 8 through the traveling frequency converter 9, so that the recovery of braking energy is realized.
Wherein, the dotted line and solid line in fig. 1 represents the program control circuit of the series hybrid forklift, the program control mainly adopts a PLC to control a walking frequency converter, a lifting frequency converter, an auxiliary equipment frequency converter, a power supply and the like, and an intelligent battery management system to control the charging and discharging of the battery pack.
In the above embodiment, preferably, as shown in fig. 2 and 3, the device further includes a winding drum 6, a cable 7 and a cable guide; the lifting motor 5 drives the winding drum 6, the winding drum 6 drives the stay cable 7, and the stay cable 7 is driven by the stay cable guide device to be installed on the inner door frame 16 of the lifting appliance 21 to be lifted. The hoisting mechanism is adopted to lift the lifting appliance and the inner gantry, and compared with a hydraulic system, the lifting appliance is simple in structure and convenient to maintain.
Preferably, the brake further comprises a coupling 13, a brake 14 and a speed reducer 15; the coupler 13, the brake 14 and the speed reducer 15 are sequentially arranged between the lifting motor 5 and the winding drum 6; the power of the lifting motor 5 is transmitted to the speed reducer 15, and the speed reducer 15 drives the winding drum 6; the brake 14 may control the suspension of the spreader 21 and the inner gantry 16.
In the technical scheme, the coupler 13 can play a role in buffering the starting and stopping of the gantry; the brake 14 can be used to stop the lifting or lowering of the gantry and spreader when required, and to be in a hovering state.
Preferably, the cable guide mechanism comprises a first fixed pulley 18 and a second fixed pulley 19, wherein the first fixed pulley 18 is installed on the body of the forklift, and the second fixed pulley 19 is installed on an outer gantry 20 of the forklift; the inner gantry 16 is provided with a movable pulley 17; the guy cable 7 is connected with the inner door frame 16 through the movable pulley 17. In the technical scheme, the fixed pulley is adopted for guiding, the movable pulley is adopted for being connected with the inner gantry, labor can be saved, the efficiency is improved, the cost is low, and the implementation is easy.
Preferably, the stay 7 comprises a wire rope; one end of the steel wire rope can be fixedly connected with the winding drum 6, and after the steel wire rope winds the first fixed pulley 18, the second fixed pulley 19 and the movable pulley 17, the other end of the steel wire rope is fixedly connected with an outer gantry 20 of the stacking machine; the wire rope may be wound around the first fixed sheave 18, the second fixed sheave 19, and the movable sheave 17, and then both ends of the wire rope may be fixedly connected to each other and wound around the drum 6. In the technical scheme, the inhaul cable is made of a steel wire rope, so that the structure is simple and the implementation is easy; and the two connecting and fixing modes of the steel wire rope can play roles in saving labor and improving efficiency.
In summary, according to the embodiments of the present invention, the potential energy generated when the gantry descends is converted into the electric energy and stored in the electric energy storage device-battery, so that the potential energy recovery efficiency is high, the energy is saved, the energy saving efficiency is high, and the motor can be driven to generate electricity and store the electricity into the electric energy storage device-battery during braking, so that the recovery of braking energy is realized, and the cost is reduced; the lifting motor is adopted to lift the portal frame and the lifting appliance, and compared with a lifting oil cylinder, the lifting oil cylinder is easy to control and more environment-friendly, and the impact of starting and stopping is small; in addition, lifting components such as a lifting motor and the like can be placed at the counterweight position, so that the counterweight weight is reduced, and the weight of the whole forklift is reduced.
In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A tandem hybrid forklift, comprising:
the electric energy lifting device comprises an electric energy supply device, a rectifier (11), an electric energy storage device (8), a walking motor (2) and a lifting motor (5);
alternating current provided by the electric energy providing device is converted into direct current by the rectifier (11) and then is connected with the electric energy storage device (8) in parallel, and the output end after the parallel connection is connected with the walking motor (2) and/or the lifting motor (5);
when the voltage at two ends of the electric energy storage device (8) is higher than the electromotive voltage of the electric energy storage device (8), the electric energy storage device (8) is charged and stores electric energy; when the voltage across the electrical energy storage device (8) is lower than the electromotive voltage of the electrical energy storage device (8), the electrical energy storage device (8) discharges, utilizing the stored electrical energy;
the walking motor (2) and the lifting motor (5) are both generator-motor dual-purpose motors;
the traveling motor (2) can drive the driving axle and the tires (3) to travel, and the driving axle and the tires (3) can drive the traveling motor (2) to generate electricity when the stacking machine brakes so as to convert braking energy into electric energy;
the lifting motor (5) can drive the lifting appliance (21) to work; the lifting appliance (21) can drive the lifting motor (5) to generate power when falling under the action of potential energy of the weight, and the potential energy of the weight is converted into electric energy.
2. The series hybrid forklift of claim 1,
the electric energy storage device is characterized by further comprising an inverter capable of converting direct current into alternating current, the inverter is arranged between an output end of the electric energy supply device after being connected with the electric energy storage device (8) in parallel and the walking motor (2) and/or the lifting motor (5), the direct current output after the electric energy supply device is connected with the electric energy storage device (8) in parallel is converted into alternating current, and the walking motor (2) and/or the lifting motor (5) are driven.
3. The series hybrid forklift of claim 1,
the device also comprises a walking frequency converter (9) and a lifting frequency converter (10);
the walking frequency converter (9) converts the direct current output by the electric energy supply device and the electric energy storage device (8) after being connected in parallel into alternating current with controllable frequency and voltage to drive the walking motor (2) to rotate;
the lifting frequency converter (10) converts the direct current output by the electric energy supply device and the electric energy storage device (8) after being connected in parallel into alternating current with controllable frequency and voltage, and drives the lifting motor (5) to rotate.
4. The series hybrid forklift according to any one of claims 1 to 3,
the electric energy supply device comprises a generator set (1) installed on the forklift and/or a commercial power supply system electrically connectable with the forklift.
5. The series hybrid forklift of claim 4,
the electric energy storage device (8) is a rechargeable battery, and the rechargeable battery is connected with the electric energy supply device in parallel through a direct current busbar (12).
6. The series hybrid forklift of claim 5,
the device also comprises a winding drum (6), a guy cable (7) and a guy cable guide device;
the lifting motor (5) drives the winding drum (6), the winding drum (6) drives the stay cable (7), and the stay cable (7) is driven by the stay cable guide device to lift the inner door frame (16) provided with the lifting appliance (21).
7. The series hybrid forklift of claim 6,
the brake is characterized by also comprising a coupling (13), a brake (14) and a speed reducer (15);
the coupler (13), the brake (14) and the speed reducer (15) are sequentially arranged between the lifting motor (5) and the winding drum (6);
the power of the lifting motor (5) is transmitted to the speed reducer (15), and the speed reducer (15) drives the winding drum (6);
the brake (14) may control the suspension of the spreader (21) and the inner gantry (16).
8. The series hybrid forklift of claim 7,
the cable guide device comprises a first fixed pulley (18) and a second fixed pulley (19), the first fixed pulley (18) is installed on the body of the forklift, and the second fixed pulley (19) is installed on an outer gantry (20) of the forklift;
a movable pulley (17) is arranged on the inner door frame (16);
the guy cable (7) is connected with the inner door frame (16) through the movable pulley (17).
9. The series hybrid forklift of claim 8,
the inhaul cable (7) is a steel wire rope;
one end of the steel wire rope is fixedly connected with the winding drum (6), and the other end of the steel wire rope is fixedly connected with the outer door frame (20) after the steel wire rope rounds the first fixed pulley (18), the second fixed pulley (19) and the movable pulley (17); or,
and after the steel wire rope rounds the first fixed pulley (18), the second fixed pulley (19) and the movable pulley (17), two ends of the steel wire rope are fixedly connected and wound on the winding drum (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102017332A CN102730604A (en) | 2012-06-18 | 2012-06-18 | Tandem hybrid fork lift truck |
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| CN2012102017332A CN102730604A (en) | 2012-06-18 | 2012-06-18 | Tandem hybrid fork lift truck |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089087A (en) * | 2015-09-07 | 2015-11-25 | 一重集团大连设计研究院有限公司 | Electric shovel hoisting system |
| CN105197839A (en) * | 2015-01-15 | 2015-12-30 | 徐州重型机械有限公司 | Combined support and stacking machine frame provided with combined support |
| CN106899071A (en) * | 2017-04-06 | 2017-06-27 | 福建工程学院 | A kind of energy-conservation forklift truck intelligent recharge and discharge method |
| CN107709221A (en) * | 2015-10-29 | 2018-02-16 | 特雷克斯有限公司 | Heavy lifting car |
| CN109038776A (en) * | 2018-06-24 | 2018-12-18 | 山东华车能源科技有限公司 | A kind of powered locomotive power supply system of dual power supply and rail locomotive |
| CN110422800A (en) * | 2019-08-09 | 2019-11-08 | 安徽合力股份有限公司 | A kind of storage battery forktruck energy distribution system and energy distributing method |
| CN112456391A (en) * | 2020-11-27 | 2021-03-09 | 厦门理工学院 | Energy-saving driving auxiliary system of electric forklift and control method thereof |
| CN113306399A (en) * | 2021-05-11 | 2021-08-27 | 台州学院 | Braking energy recovery method and device for improving braking performance of whole vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830750A (en) * | 2006-03-31 | 2006-09-13 | 西安交通大学 | An electric forklift lifting control system with energy recovery |
| CN2930061Y (en) * | 2006-07-20 | 2007-08-01 | 青岛经济技术开发区创统科技发展有限公司 | UPS for industrial driving |
| JP2009126643A (en) * | 2007-11-22 | 2009-06-11 | Toyota Industries Corp | Stacker crane driving device |
| CN101973271A (en) * | 2010-10-28 | 2011-02-16 | 湖南山河智能机械股份有限公司 | Driving and energy recovery system for hybrid excavator |
| CN102040177A (en) * | 2010-12-03 | 2011-05-04 | 威仁（西安）仓储设备有限公司 | Heavy duty stacker for containers |
-
2012
- 2012-06-18 CN CN2012102017332A patent/CN102730604A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830750A (en) * | 2006-03-31 | 2006-09-13 | 西安交通大学 | An electric forklift lifting control system with energy recovery |
| CN2930061Y (en) * | 2006-07-20 | 2007-08-01 | 青岛经济技术开发区创统科技发展有限公司 | UPS for industrial driving |
| JP2009126643A (en) * | 2007-11-22 | 2009-06-11 | Toyota Industries Corp | Stacker crane driving device |
| CN101973271A (en) * | 2010-10-28 | 2011-02-16 | 湖南山河智能机械股份有限公司 | Driving and energy recovery system for hybrid excavator |
| CN102040177A (en) * | 2010-12-03 | 2011-05-04 | 威仁（西安）仓储设备有限公司 | Heavy duty stacker for containers |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105197839B (en) * | 2015-01-15 | 2017-11-28 | 徐州重型机械有限公司 | Modular support and the stacker vehicle frame that modular support is set |
| CN105197839A (en) * | 2015-01-15 | 2015-12-30 | 徐州重型机械有限公司 | Combined support and stacking machine frame provided with combined support |
| CN105089087A (en) * | 2015-09-07 | 2015-11-25 | 一重集团大连设计研究院有限公司 | Electric shovel hoisting system |
| US10457534B2 (en) | 2015-10-29 | 2019-10-29 | Konecranes Global Corporation | Heavy-duty lift truck |
| CN107709221A (en) * | 2015-10-29 | 2018-02-16 | 特雷克斯有限公司 | Heavy lifting car |
| CN107709221B (en) * | 2015-10-29 | 2019-12-13 | 科尼起重机全球公司 | Heavy crane |
| CN106899071A (en) * | 2017-04-06 | 2017-06-27 | 福建工程学院 | A kind of energy-conservation forklift truck intelligent recharge and discharge method |
| CN106899071B (en) * | 2017-04-06 | 2023-06-20 | 福建工程学院 | Intelligent charging and discharging method for energy-saving forklift |
| CN109038776A (en) * | 2018-06-24 | 2018-12-18 | 山东华车能源科技有限公司 | A kind of powered locomotive power supply system of dual power supply and rail locomotive |
| CN110422800A (en) * | 2019-08-09 | 2019-11-08 | 安徽合力股份有限公司 | A kind of storage battery forktruck energy distribution system and energy distributing method |
| CN110422800B (en) * | 2019-08-09 | 2020-09-25 | 安徽合力股份有限公司 | Energy distribution system and energy distribution method for storage battery forklift |
| CN112456391A (en) * | 2020-11-27 | 2021-03-09 | 厦门理工学院 | Energy-saving driving auxiliary system of electric forklift and control method thereof |
| CN113306399A (en) * | 2021-05-11 | 2021-08-27 | 台州学院 | Braking energy recovery method and device for improving braking performance of whole vehicle |
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