CN2804052Y - Static pressure driven internal combustion forklift - Google Patents
Static pressure driven internal combustion forklift Download PDFInfo
- Publication number
- CN2804052Y CN2804052Y CN 200520101938 CN200520101938U CN2804052Y CN 2804052 Y CN2804052 Y CN 2804052Y CN 200520101938 CN200520101938 CN 200520101938 CN 200520101938 U CN200520101938 U CN 200520101938U CN 2804052 Y CN2804052 Y CN 2804052Y
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- China
- Prior art keywords
- static pressure
- hydraulic pump
- internal combustion
- hydraulic
- lift truck
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- Forklifts And Lifting Vehicles (AREA)
Abstract
A novel static pressure driven internal combustion forklift includes front wheels which acquire dynamic force from an internal combustion engine, a working device and a steering gear. The static pressure driven internal combustion forklift is characterized in that: the internal combustion engine drives a variable hydraulic pump and a quantitative hydraulic pump through a gear box. An open type hydraulic system and double stage variable hydraulic motors, which are arranged respectively at the left and right and directly drive front wheels, are adopted. The working device and double stage variable hydraulic motors are supplied with hydraulic oil by the variable hydraulic pump; the steering gear is supplied with hydraulic oil by the quantitative hydraulic pump. The static pressure driven internal combustion forklift adopts a closed-type hydraulic system and is supplied with oil by using the same pump with the working device, and has simple structure, high system efficiency, wide speed adjustable range, favorable loading and unloading operation, fine energy-saving effect and convenient repair and maintenance.
Description
Technical field
The utility model relates to a kind of material handling machinery, specifically is a kind of diesel fork lift truck of static pressure transmission.
Background technology
At present, the most of fork truck products of China are mechanical drive and hydraulic transmission, and wherein mechanical drive fork truck driving system is made easyly, and the efficient height is most widely used, but that its is handled is complicated, the chaufeur fatiguability, and low speed traction property, fretting performance are poor; Hydraulic transmission fork truck turbine transformer has good soft mechanical characteristic, can self adaptation the variation of extraneous resistance, so fretting performance, low speed tractive property are better, but complex structure, manufacturing cost height, driving efficiency is low.Hydrostatic lift truck is made up of volume adjustable hydraulic pump, fixed displacement motor or variable-dis-placement motor, control cock and pipeline, simple in structure, utilize the dual regulation of the adjusting of volume adjustable hydraulic pump or volume adjustable hydraulic pump, variable hydraulic motor, make that fork truck can automatically regulating rotating speed and torque have excellent traction performance and fretting performance with extraneous resistance, good operation performance, simple in structure, and driver element is hydraulic transmission, do not have mechanically operated wearing and tearing and impact, the fork truck long service life.
External most of fork truck enterprise from last century the eighties just with hydrostatic lift truck as leading product, the share of market of hydrostatic lift truck improves year by year.And domestic owing to factors such as technical reason and the restrictions of static pressure components and parts, though some producers also did trial-production, the hydrostatic lift truck of batch manufacturing does not still have.The hydrostatic lift truck of external famous producer adopts volume adjustable hydraulic pump, constant displacement hydraulic motor, drg and control cock to be integrated in the device, its advantage is: compact conformation, good rigidly, oil circuit and joint sealing are in housing, loss of pressure is little, the efficient height, line seal is good, the reliability height, but its technical risk is big, manufacturing cost is high.
The utility model content
The technical assignment of the technical problems to be solved in the utility model and proposition is to overcome the existing above-mentioned defective that car exists of inserting, and a kind of static pressure transmission diesel fork lift truck is provided.For this reason, the utility model is by the following technical solutions:
A kind of static pressure transmission diesel fork lift truck comprises the front vehicle wheel, equipment and the steering hardware that obtain power from combustion engine; It is characterized in that driving volume adjustable hydraulic pump and quantitative hydraulic pump by gear case by combustion engine, adopt open type hydraulic system, about split the twin-stage variable hydraulic motor of direct drive front vehicle wheel, by described volume adjustable hydraulic pump to equipment and twin-stage variable hydraulic motor for hydraulic oil; Supply hydraulic oil by quantitative hydraulic pump to steering hardware.
As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature:
Described gear case is the structure of single gear deceleration, enclosed casing and oil bath lubrication.
Described volume adjustable hydraulic pump is provided with the discharge capacity of control fluid, two control mouths of pressure variations output.Function shown in the characteristic conforms table 1 of output, " 1 " expression fuel feeding operating mode in the table, " 0 " represents not fuel feeding operating mode.
Table 1:
Be provided with the governor valve of realizing fluid commutation, throttling and locking between described volume adjustable hydraulic pump and the twin-stage variable hydraulic motor; And then control vehicle break-in, deceleration and braking.
Described governor valve is three combine valves.
Be provided with by two two multiple directional control valves that six-way valve constitutes in parallel between described volume adjustable hydraulic pump and the equipment.Manual reverse of direction, spring reset, its function meets the statement in the accompanying drawing, and is split-type structural.
The utility model has following technique effect: 1. vehicle to run and equipment are all used the volume adjustable hydraulic pump fuel feeding, be different from other static pressure running gear and drive with controllable capacity pump, and equipment drives with fix-displacement pump, and be simple in structure, the system effectiveness height; 2. HM Hydraulic Motor is the twin-stage variable-dis-placement motor, and speed adjustable range is wide, can satisfy various operating modes such as vehicle high speed, low speed driving and fine motion, is beneficial to loading and unloading operation; 3. adopt radial piston hydraulic motor direct drive wheel, no speed reduction gearing, owing to mechanical the wearing and tearing impacted, do not had to hydraulic pressure transfer energy flexibility, nothing, so the fault of fork truck is few, the life-span is long, noise is low; 4. the employed controllable capacity pump of vehicle has the setting of two-stage pressure and discharge capacity, and has pressure, discharge capacity and can realize variable compensated function with the variation of load, so this fork truck has good energy-saving effect; 5. this fork lift truck structure is simple, is convenient to maintenance.
Description of drawings
Fig. 1 is a hydraulic schematic diagram of the present utility model.
Among the figure: 1. hydraulic reservoir, 2. oil filter, 3. combustion engine, 4. gear case, 5. quantitative hydraulic pump, 6. volume adjustable hydraulic pump, 7. governor valve, 8. turn to oil cylinder, 9. all-hydraulic steering gear, 10. control cock, 11. multiple directional control valves, 12. governor valves, 13. lift oil tanks, 14. dump rams, 15. variable-dis-placement motors, 16. pilot operated valve device.
The specific embodiment
Static pressure transmission diesel fork lift truck as shown in the figure mainly comprises combustion engine 3, becomes Hydraulic Pump 6, governor valve 7, control cock 10, multiple directional control valve 11, variable-dis-placement motor 15, pilot operated valve device 16.Combustion engine 3 drives controllable capacity pump work by gear case 4, gives governor valve, control cock, multiple directional control valve fuel feeding simultaneously through piping.
When vehicle is not worked, fluid is got back to controllable capacity pump Cz mouth by the meta of multiple directional control valve 11 and the meta of pilot operated valve device 16, be that C2 is in one state, at this moment no matter break-make is whether for the oil circuit that leads to controllable capacity pump C1 mouth, be no matter C1 is at " 1 " or " 0 " state, controllable capacity pump 6 is in the unloading condition of low pressure low discharge, and at this moment combustion engine 3 is in the idling mode of minimum load; The action that hoists or tilt forward and back when fork truck, and vehicle is not when walking, multiple directional control valve 11 no longer is in meta, the C2 oil circuit is cut off, promptly be in " 0 " state, and this moment, c1 also was in " 0 " state, and at this moment controllable capacity pump 6 is in the maximum flow scope of setting up in advance, and pressure is according to the load decision; When the vehicle operation device is not worked, manipulation governor valve 7 advances fork truck or retreats when walking, one and pressure oil circuit P connect among pipeline A, the B, another then is communicated with the pipeline T of logical fuel tank 1, produce pressure reduction between A, the B pipeline, thereby make pilot operated valve device 16 not at meta, at this moment C1 cuts off, be " 0 " state, C2 connects and is one state, and then controllable capacity pump 6 carries out the quantitative control of approximate constant power according to load in the flow of setting up in advance, range of pressure, be in peak load, controllable capacity pump is most effective at this moment.
Other element is realized all the other functions of described fork truck in the utility model: control cock 10 realizes the walking of vehicle and the conversion of braking during standstill, low gear and high speed gear; Quantitative hydraulic pump 5, all-hydraulic steering gear 9, turn to the function that turns to of realization vehicles such as oil cylinder 8; Lift oil tank 13, dump ram 14 are realized the loading and unloading operation of equipment.
Claims (6)
1, a kind of static pressure transmission diesel fork lift truck comprises the front vehicle wheel, equipment and the steering hardware that obtain power from combustion engine; It is characterized in that driving volume adjustable hydraulic pump and quantitative hydraulic pump by gear case by combustion engine, adopt open type hydraulic system, about split the twin-stage variable hydraulic motor of direct drive front vehicle wheel, by described volume adjustable hydraulic pump to equipment and twin-stage variable hydraulic motor for hydraulic oil; Supply hydraulic oil by quantitative hydraulic pump to steering hardware.
2, static pressure transmission diesel fork lift truck according to claim 1 is characterized in that described gear case is the structure of single gear deceleration, enclosed casing and oil bath lubrication.
3, static pressure transmission diesel fork lift truck according to claim 1 is characterized in that described volume adjustable hydraulic pump is provided with two control mouths of the discharge capacity of control fluid, pressure variations output.
4, static pressure transmission diesel fork lift truck according to claim 1 is characterized in that being provided with between described volume adjustable hydraulic pump and the twin-stage variable hydraulic motor governor valve of realizing fluid commutation, throttling and locking; And then control vehicle break-in, deceleration and braking.
5, static pressure transmission diesel fork lift truck according to claim 4 is characterized in that described governor valve is three combine valves.
6, static pressure transmission diesel fork lift truck according to claim 1 is characterized in that being provided with by two two multiple directional control valves that six-way valve constitutes in parallel between described volume adjustable hydraulic pump and the equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520101938 CN2804052Y (en) | 2005-04-30 | 2005-04-30 | Static pressure driven internal combustion forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520101938 CN2804052Y (en) | 2005-04-30 | 2005-04-30 | Static pressure driven internal combustion forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2804052Y true CN2804052Y (en) | 2006-08-09 |
Family
ID=36909349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520101938 Expired - Lifetime CN2804052Y (en) | 2005-04-30 | 2005-04-30 | Static pressure driven internal combustion forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2804052Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678687A (en) * | 2012-05-22 | 2012-09-19 | 山河智能装备股份有限公司 | On-car revolution energy-saving system |
| CN107120195A (en) * | 2017-06-30 | 2017-09-01 | 上海和兰透平动力技术有限公司 | gas turbine closed hydraulic starting system |
-
2005
- 2005-04-30 CN CN 200520101938 patent/CN2804052Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678687A (en) * | 2012-05-22 | 2012-09-19 | 山河智能装备股份有限公司 | On-car revolution energy-saving system |
| CN102678687B (en) * | 2012-05-22 | 2015-04-22 | 山河智能装备股份有限公司 | On-car revolution energy-saving system |
| CN107120195A (en) * | 2017-06-30 | 2017-09-01 | 上海和兰透平动力技术有限公司 | gas turbine closed hydraulic starting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150430 Granted publication date: 20060809 |