CN2511663Y - Hydraulic electric fork lift - Google Patents
Hydraulic electric fork lift Download PDFInfo
- Publication number
- CN2511663Y CN2511663Y CN 01234019 CN01234019U CN2511663Y CN 2511663 Y CN2511663 Y CN 2511663Y CN 01234019 CN01234019 CN 01234019 CN 01234019 U CN01234019 U CN 01234019U CN 2511663 Y CN2511663 Y CN 2511663Y
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- 239000012530 fluid Substances 0.000 claims description 29
- 239000002828 fuel tank Substances 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000003028 elevating effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 43
- 239000010720 hydraulic oil Substances 0.000 description 7
- 238000004880 explosion Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model relates to a hydraulic electric fork lift. Most of the prior counter-balanced electric fork lifts adopt a layout proposal of three electric motors and complex electrical timing technique, which leads to a crowded internal structure of the fork lift, uneasy assembly, difficult maintenance, great quantity of electrical switches and relays needed to operate the three electric motors. The utility model comprises a vehicle body, two oil boxes, an electric motor, a variable pump connected with the electric motor, a multitandem valve, a steering apparatus, a tilting elevating gear and a running driving gear, and is characterized in that the electric motor is a single electric motor, the multitandem valve comprises a tilting valve, a lifting valve, a running valve and a control valve, which are connected into a whole by a connecting piece, the multitandem valve is provided with a main oil port communicated with the four valves, and two branch oil ports; a preferential valve is arranged between the variable pump and the two branch oil ports. The utility model is simple in structure, easy in assembly and maintenance, and convenient in operation, and improves the reliability and the service life of the electric motor, realizes oil feeding with the same pump and improves safe performance of the whole machine obviously.
Description
[technical field]
The utility model relates to a kind of balance weight type electri forklift, especially a kind of fully-hydraulic electric fork truck.
[background technology]
Existing balance weight type electri forklift great majority adopt three motor allocation plans, promptly walk actuating device, hoist equipment and steering hardware used a motor-driven respectively, the layout of three motors and complicated separately transmission device make the fork truck inner structure crowded, assembling is difficult for, maintenance difficult is operated the required electric switch of three motors, relay quantity is many.During operation, three motors frequently open braking, not only influence the life-span of motor transmission mechanism, and it is very big to start instantaneous current, and the power supply overdischarge, energy consumption is big, efficient is low, to such an extent as to influence work production efficient.The chassis structure complexity of three motors configurations is restricted the volume of fuel tank, and the heat that hydraulic oil produces can not obtain fine cooling, and heating is aging easily to cause hydraulic oil, and Hydraulic Elements and auxiliary thereof damage etc. easily, directly influences the safe reliability of complete machine.In addition, the speed control of motor adopts complicated electric speed adjusting technique in the travel driving unit, and the most import electrical controllers that adopt of used electric speed setting controller cost an arm and a leg.
[summary of the invention]
Technical assignment of the present utility model is to address the deficiencies of the prior art, provide a kind of simple in structure, easy to assembly, maintenance easily, the long service life of motor, cost is low, travel driving unit adopts Hydraulic Adjustable Speed fully-hydraulic electric fork truck.
The technical solution of the utility model is achieved in that fully-hydraulic electric fork truck, comprises vehicle body, fuel tank, motor, the controllable capacity pump that links to each other with motor, multiway valve, steering hardware, inclined lift device, travel driving unit, the pallet fork door frame is characterized in that described motor is single motor; Described multiway valve comprises inclined valve, plays lift valve, walking valve and control cock, four valves are connected as a single entity by attaching parts, multiway valve is provided with a main hydraulic fluid port that communicates with four valves and two shunt hydraulic fluid ports, and main hydraulic fluid port and two shunt hydraulic fluid ports are communicated with the oil outlet of controllable capacity pump by oil pipe; Be provided with a pressure-gradient control valve between two shunt hydraulic fluid ports and controllable capacity pump, an oil outlet of pressure-gradient control valve is communicated with steering hardware, and another oil outlet is communicated with two shunt hydraulic fluid ports, and the oil inlet of pressure-gradient control valve is communicated with the oil outlet of controllable capacity pump.The utility model adopts single driven by motor one controllable capacity pump, by multiway valve control inclined lift device and travel driving unit, steering hardware, inclined lift device and travel driving unit can be worked alone, having changed in the past, these install by three separately-driven situations of motor, realized the common oil pump feed of multiple arrangement, make designs simplification, assembling and maintenance easily, safe and reliable.In addition, switch, relay etc. greatly reduce, and are convenient to carry out explosion-proof design and manufacturing, and the complete machine explosion-proof performance obviously improves.
Described fully-hydraulic electric fork truck, the first shunt hydraulic fluid port communicates with the cavity of an inclined valve and a lift valve, inclined valve connects dump ram, play lift valve and connect lift oil tank, the second shunt hydraulic fluid port communicates with the cavity of walking valve, the walking valve connects double speed hydraulic motor, is provided with a flow regulating valve between walking valve and pressure-gradient control valve, and flow regulating valve can carry out infinite speed variation to the speed of walking.
Described fully-hydraulic electric fork truck, control cock is communicated with the oil suction chamber and the Hydraulic Adjustable Speed valve of high and low pressure servo pressure regulator, locating oil cylinder respectively by oil pipe, the piston rod of locating oil cylinder extend with controllable capacity pump bonded assembly variable oil cylinder oil suction chamber in, the oil suction chamber of variable oil cylinder is communicated with the high and low pressure servo pressure regulator.The different output characteristic of control cock control variable pump and the different displacements of HM Hydraulic Motor make up, thereby make travel driving unit have multiple outer tractive characteristic.
Described fully-hydraulic electric fork truck, double speed hydraulic motor connects hydraulic brake and is used for the Hydraulic Adjustable Speed valve of governor motor discharge capacity, hydraulic brake is communicated with flow regulating valve by oil pipe, by the Hydraulic Adjustable Speed valve, the high and low pressure servo pressure regulator, the loop that controllable capacity pump and double speed hydraulic motor constitute is controlled the rotating speed of double speed hydraulic motor as the Hydraulic Adjustable Speed loop by the Hydraulic Adjustable Speed valve, thereby has realized the Hydraulic Adjustable Speed of travel driving unit; The two fuel tanks of fuel tank for being communicated with are located at chassis, make system's temperature rise slow, have prevented that oily temperature is overheated.
The utlity model has following advantage: (1) adopts single motor easily to arrange, and is simple in structure, easy to maintenance, the reliability and the service life of having improved motor, realized common oil pump feed; (2) adopt Hydraulic Adjustable Speed to alleviate the labour intensity of chaufeur, obviously improved the ride comfort of complete machine, fine setting property and stepless change characteristic, reduced cost; (3) two fuel tank oil storages have prevented that hydraulic oil is overheated and have damaged Hydraulic Elements; (4) electric contact such as switch, relay greatly reduces, and the safety performance of complete machine obviously improves, and especially is convenient to carry out the design of explosion proof type fork truck.
[description of drawings]
Fig. 1 is a fluid control schematic diagram of the present utility model.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the structural representation of the utility model multiway valve.
[specific embodiment]
As shown in Figure 1, 2, 3, fully-hydraulic electric fork truck, comprise power supply, vehicle body 1, two fuel tanks 6, single motor 4, the controllable capacity pump 5, multiway valve 7 and the pallet fork door frame 13 that link to each other with single motor 4 by coupler, by hydraulic steering gear 31, the steering hardware 3 that turns to oil cylinder 32, safety valve 33 and check valve 34 to form, the inclined lift device of forming by dump ram 11 and lift oil tank 12 2, form travel driving unit 9 by double speed hydraulic motor 91, the hydraulic brake 92 and the Hydraulic Adjustable Speed valve 93 that are arranged on the motor, hydraulic brake 92 is by a hydraulic brake valve 14 controls.Multiway valve 7 is by inclination control cock 71, control cock 72 hoists, walking change-over valve 73, control cock 74 compositions such as grade, four valves are connected as a single entity by attaching parts 75, described four valves are three six-way valves, multiway valve is provided with a main hydraulic fluid port 77 that communicates with four valves and two shunt hydraulic fluid ports 76,78, the first shunt hydraulic fluid port 76 communicates with the cavity of an inclined valve and a lift valve, the second shunt hydraulic fluid port 78 communicates with the cavity of walking valve, main hydraulic fluid port is connected with the oil outlet of controllable capacity pump by oil pipe with two shunt hydraulic fluid ports, inclined valve connects dump ram 11, play lift valve and connect lift oil tank 12, the walking valve connects double speed hydraulic motor 91, is provided with a pressure-gradient control valve 10 between two shunt hydraulic fluid ports and steering hardware and controllable capacity pump.An oil outlet of pressure-gradient control valve is connected with steering hardware 3, and another oil outlet is connected with two shunt hydraulic fluid ports, and the oil inlet of pressure-gradient control valve is connected with the oil outlet of controllable capacity pump.Control cock 74 is connected with Hydraulic Adjustable Speed valve 93 with the oil suction chamber of high and low pressure servo pressure regulator 51,52, locating oil cylinder 54 respectively by oil pipe, the piston rod of locating oil cylinder extend with controllable capacity pump bonded assembly variable oil cylinder 53 oil suction chambers in, the oil suction chamber of variable oil cylinder is connected with the high and low pressure servo pressure regulator.Double speed hydraulic motor 91 connects hydraulic brake 92 and is used for the Hydraulic Adjustable Speed valve 93 of governor motor discharge capacity, and hydraulic brake 92 is connected with flow regulating valve 8 by oil pipe.By the Hydraulic Adjustable Speed valve, the high and low pressure servo pressure regulator, the loop that controllable capacity pump and double speed hydraulic motor constitute is as the Hydraulic Adjustable Speed loop,
During work, the energy of power supply flows to motor through electric controller, the motor operation, the oil pump that is attached thereto is from the fuel tank oil suction, discharge hydraulic oil again, one the tunnel is communicated with fuel tank and forms main oil return line, gives the control cock fuel feeding at main hydraulic fluid port 77 (the C place among Fig. 1), and another road turns to oil cylinder and multiway valve through the pressure-gradient control valve connection.The effect of pressure-gradient control valve is when guaranteeing under any circumstance to need to turn to, preferentially to turning to oil cylinder to supply with required flow, when turning to unnecessary flow or when not turning to most flow enter multiway valve.When the walking change-over valve in the operation multiway valve, hydraulic oil enters double speed hydraulic motor through shunt hydraulic fluid port 78 (the B place among Fig. 1), the motor forward or reverse, so fork truck advances or retreats, the running velocity of Hydraulic Adjustable Speed valve regulation car load in any case, needs only one and steps on hydraulic brake valve, motor is stall just, and fork truck stops walking.When operation hoisting when control cock or inclination control cock in the multiway valve, hydraulic oil enters lift oil tank or dump ram through shunt hydraulic fluid port 76 (the A place among Fig. 1), and the pallet fork door frame can rise, descends or lean forward, hypsokinesis.Control cock is communicated with Hydraulic Adjustable Speed valve and high and low pressure servo pressure regulator, and the different output characteristic of control variable pump and the different displacements of HM Hydraulic Motor make up, thereby make travel driving unit have multiple outer tractive characteristic.When motor rotation and during the multiway valve lean-with, hydraulic oil oil sump tank, device off-load.The off-load of motor controllable capacity pump, the heavy-current discharge when avoiding frequent motor starting and energy-conservation.
The utility model is applicable to the non-anti-explosion electric fork truck of coventional type, anti-explosion electric fork truck, and its Hydraulic Adjustable Speed also is applicable to diesel fork lift truck.
Claims (5)
1, fully-hydraulic electric fork truck comprises vehicle body (1), fuel tank (6), motor (4), the controllable capacity pump that links to each other with motor (5), multiway valve (7), steering hardware (3), inclined lift device (2), travel driving unit (9), pallet fork door frame (13) is characterized in that described motor (4) is single motor; Described multiway valve (7) comprises inclined valve (71), plays lift valve (72), walking valve (73) and control cock (74), four valves are connected as a single entity by attaching parts (75), multiway valve (7) is provided with a main hydraulic fluid port (77) that communicates with four valves and two shunt hydraulic fluid ports (76,78), and main hydraulic fluid port (77) and two shunt hydraulic fluid ports (76,78) are communicated with the oil outlet of controllable capacity pump by oil pipe; Be provided with a pressure-gradient control valve (10) between two shunt hydraulic fluid ports and controllable capacity pump (5), an oil outlet of pressure-gradient control valve is communicated with steering hardware (3), and another oil outlet is communicated with two shunt hydraulic fluid ports, and the oil inlet of pressure-gradient control valve is communicated with the oil outlet of controllable capacity pump.
2, fully-hydraulic electric fork truck according to claim 1, it is characterized in that the first shunt hydraulic fluid port (76) communicates with the oil inlet of an inclined valve (71) and a lift valve (72), inclined valve connects dump ram (11), play lift valve and connect lift oil tank (12), the second shunt hydraulic fluid port (78) communicates with the oil inlet of walking valve (73), the actuator port of walking valve is communicated with double speed hydraulic motor (91), is provided with a flow regulating valve (8) between two shunt hydraulic fluid ports and pressure-gradient control valve (10).
3, fully-hydraulic electric fork truck according to claim 1, it is characterized in that control cock (74) is communicated with the oil suction chamber and the Hydraulic Adjustable Speed valve (93) of high and low pressure servo pressure regulator (51,52), locating oil cylinder (54) respectively by oil pipe, the piston rod of locating oil cylinder extend with controllable capacity pump bonded assembly variable oil cylinder (53) oil suction chamber in, the oil suction chamber of variable oil cylinder is communicated with the high and low pressure servo pressure regulator.
4, fully-hydraulic electric fork truck according to claim 1 is characterized in that double speed hydraulic motor (91) connects hydraulic brake (92) and is used for the Hydraulic Adjustable Speed valve (93) of governor motor discharge capacity, and hydraulic brake (92) is communicated with flow regulating valve (8) by oil pipe.
5, fully-hydraulic electric fork truck according to claim 1 is characterized in that the two fuel tanks of described fuel tank (6) for being communicated with, and is located at chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01234019 CN2511663Y (en) | 2001-08-14 | 2001-08-14 | Hydraulic electric fork lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01234019 CN2511663Y (en) | 2001-08-14 | 2001-08-14 | Hydraulic electric fork lift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2511663Y true CN2511663Y (en) | 2002-09-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01234019 Expired - Lifetime CN2511663Y (en) | 2001-08-14 | 2001-08-14 | Hydraulic electric fork lift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2511663Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100577554C (en) * | 2006-04-19 | 2010-01-06 | 浙江佳力科技股份有限公司 | Full hydraulic electric forklift hydraulic system |
| CN101811652A (en) * | 2010-04-01 | 2010-08-25 | 张波 | Electric forklift |
| CN103910311A (en) * | 2014-04-10 | 2014-07-09 | 安徽合力股份有限公司 | Hydraulic system of empty container stacking locomotive |
| CN106515419A (en) * | 2016-12-21 | 2017-03-22 | 景德镇陶瓷大学 | Oil-electric hybrid forklift |
| CN106629487A (en) * | 2016-12-21 | 2017-05-10 | 景德镇陶瓷大学 | Forklift |
| CN113184755A (en) * | 2021-06-11 | 2021-07-30 | 陕西秦之基智能科技有限公司 | Pneumatic crawler-type forklift and method |
-
2001
- 2001-08-14 CN CN 01234019 patent/CN2511663Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100577554C (en) * | 2006-04-19 | 2010-01-06 | 浙江佳力科技股份有限公司 | Full hydraulic electric forklift hydraulic system |
| CN101811652A (en) * | 2010-04-01 | 2010-08-25 | 张波 | Electric forklift |
| CN103910311A (en) * | 2014-04-10 | 2014-07-09 | 安徽合力股份有限公司 | Hydraulic system of empty container stacking locomotive |
| CN106515419A (en) * | 2016-12-21 | 2017-03-22 | 景德镇陶瓷大学 | Oil-electric hybrid forklift |
| CN106629487A (en) * | 2016-12-21 | 2017-05-10 | 景德镇陶瓷大学 | Forklift |
| CN113184755A (en) * | 2021-06-11 | 2021-07-30 | 陕西秦之基智能科技有限公司 | Pneumatic crawler-type forklift and method |
| CN113184755B (en) * | 2021-06-11 | 2024-05-07 | 陕西秦之基智能科技有限公司 | Pneumatic crawler forklift and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |