CN102583193A - Off-road type forklift with hydrostatic four-wheel drive and articulated frame - Google Patents
Off-road type forklift with hydrostatic four-wheel drive and articulated frame Download PDFInfo
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- CN102583193A CN102583193A CN201210035902XA CN201210035902A CN102583193A CN 102583193 A CN102583193 A CN 102583193A CN 201210035902X A CN201210035902X A CN 201210035902XA CN 201210035902 A CN201210035902 A CN 201210035902A CN 102583193 A CN102583193 A CN 102583193A
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Abstract
The invention relates to an off-road type forklift with hydrostatic four-wheel drive and an articulated frame. The forklift comprises a front forklift body and a rear forklift body, which are connected through an articulation mechanism and a steering cylinder, wherein two wheels are respectively arranged on the front forklift body and the rear forklift body; each wheel is arranged at the output end of one hydraulic motor; a drive cabin is arranged on the front forklift body; a lifting mechanism is connected at the front side of the front forklift body; an engine is arranged on the rear forklift body; a transfer case is connected at the flying wheel end of the engine; three oil pumps, namely a variable pump, a first constant pump and a second constant pump are connected at the output end of the transfer case; the variable pump is connected with four hydraulic motors; the first constant pump is connected with the lifting mechanism; and the second constant pump is connected with a steering system. According to the forklift, the articulated frame and the hydrostatic four-wheel drive are adopted, the wheels can be ensured to be fully grounded, and the maximal wheel side thrust of the hydraulic motors is brought into play; and the off-road performance of the forklift is good, so that the application range of the forklift is greatly expanded.
Description
Technical field
The present invention relates to fork truck, the hinged frame cross-country type of specifically a kind of hydrostatic four wheel drive fork truck.
Background technology
At present, the transmission arrangement form of universal fork truck all is f-w-d and rear-axle steering, and adopts unit frame and lower terrain clearance.Propons has diff, and nonelastic suspension; Unsettled if any single wheel, then front-wheel runs out of steam fully.It is on the swing frame about 8 ° that trailing wheel is installed in the band oscillating quantity mostly, also nonelastic suspension.Therefore its staking-out work condition is can only operation on smooth strong road surface, this just big limitations the range of use of fork truck.
From domestic operating needs: building sites such as various lots of road, bridge, water conservancy, factory buildings; Its lifting loading and unloading task all can only be born by tower crane, wheel crane, and fork truck wider for action radius and that manoevreability is stronger is powerless with muddy soft road because of uneven in the building site.
Summary of the invention
The present invention is directed to the problems referred to above, the hinged frame cross-country type of a kind of hydrostatic four wheel drive fork truck is provided, this fork truck can operation on rugged ground, has good off-road capability.
According to technical scheme of the present invention: the hinged frame cross-country type of a kind of hydrostatic four wheel drive fork truck; Comprise car body and lift system; Said car body comprises front vehicle body and aftercarriage, and said front vehicle body links to each other through the linkwork of two degree of freedom and the oil cylinder that turns to of two band oscillating bearing earrings with said aftercarriage; Be furnished with two wheels on said front vehicle body and the said aftercarriage respectively, each said wheel is installed in the mouth of a HM Hydraulic Motor respectively; Be furnished with driving compartment on the said front vehicle body, the place ahead of said front vehicle body is connected with said lift system; Be furnished with driving engine on the said aftercarriage; The flywheel end of said driving engine is connected with auxiliary gear box; The mouth of said auxiliary gear box is connected with three oil pumps, is respectively controllable capacity pump, first fix-displacement pump and second fix-displacement pump, and said controllable capacity pump links to each other with four said HM Hydraulic Motors; Said first fix-displacement pump links to each other with said lift system, and said second fix-displacement pump links to each other with steering swivel system.
Said driving engine adopts diesel motor.Said auxiliary gear box comprises casing; An input shaft and three output shafts are installed in the said casing; On the said input shaft input gear is installed; On each said output shaft output gear is installed, through three intermediate gears and three said output gear engaged transmission, said three output shafts link to each other with said three oil pumps respectively said input gear respectively.
The axle head of said three output shafts all is a hollow, and the axle head of said three oil pumps stretches into the axle head of said three output shafts respectively and links to each other.Said lift system comprises door frame, lifting mechanism, dump ram and pallet fork, and said door frame is hinged on the said front vehicle body through pivoted arm and dump ram, and said pallet fork is installed on the said door frame through said lifting mechanism.Said door frame comprises outer mast and inner upright mounting, and said pallet fork is installed on the said inner upright mounting through balladeur train, and said inner upright mounting is installed on the said outer mast through hoisting chain and elevating ram.
Said steering swivel system comprises the hydraulic steering gear that is installed in the said driving compartment, and the input end of said hydraulic steering gear links to each other with said second fix-displacement pump, and the mouth of said hydraulic steering gear links to each other with two said oil cylinders that turn to respectively.Said linkwork comprises the T oblique crank Z that is made up of vertical pivot and horizontal shaft, and the two ends of the vertical pivot of said T oblique crank Z are installed in respectively in top chock and the step, and the horizontal shaft of said T oblique crank Z is installed in the rotating shaft mount pad.Said top chock and said step are installed in the rear of said front vehicle body, and said rotating shaft mount pad is installed in the place ahead of said aftercarriage.On the horizontal shaft of said T oblique crank Z positioning plate is installed.
Technique effect of the present invention is: car body before and after the present invention adopts independently, and the linkwork with two degree of freedom connects between the car body of front and back, the abundant ground connection of four wheels of car body before and after guaranteeing, and the bull wheel limit thrust of performance HM Hydraulic Motor; Form the positive displacement speed governing by driving engine through controllable capacity pump and four HM Hydraulic Motors that auxiliary gear box drives, thereby obtain the high efficiency of running gear and the structure of refining; The oil cylinder that turns between fix-displacement pump, all-hydraulic steering gear and front and back car body is formed servo steering system, can obtain minimum Turning radius and higher steering sensitivity; Off-road capability of the present invention is strong, can run on rugged road surfaces, building site such as road and bridge, water conservancy, factory building, perhaps on mountain region in the disaster relief and rescue or soft arable land, sand ground and the snowfield, thereby has expanded the use face of fork truck greatly.
Description of drawings
Fig. 1 is a structural representation of the present invention.Fig. 2 is the birds-eye view of Fig. 1.
Fig. 3 is the structural representation of the aftercarriage among the present invention.Fig. 4 is the birds-eye view of Fig. 3.
Fig. 5 is the structural representation of the auxiliary gear box among the present invention.Fig. 6 is the birds-eye view of Fig. 5.
Fig. 7 is the left view of Fig. 5.Fig. 8 is that A among Fig. 7 is to view.
Fig. 9 is a hydraulic system principle figure of the present invention.
Figure 10 is the HM Hydraulic Motor among the present invention and the structural representation of wheel.
Figure 11 is the left view of Figure 10.
Figure 12 is the structural representation of the front vehicle body among the present invention.Figure 13 is the birds-eye view of Figure 12.
Figure 14 is the structural representation of the lift system among the present invention.
Figure 15 is the birds-eye view of Figure 14.Figure 16 is the right elevation of Figure 14.
Figure 17 is the structural representation of linkwork between the front and back car body among the present invention.
Figure 18 is the birds-eye view of Figure 17.
The specific embodiment
Be further described below in conjunction with the accompanying drawing specific embodiments of the invention.
Among Fig. 1 ~ Figure 18, comprise front vehicle body 1, aftercarriage 2, lift system 3, linkwork 4, turn to oil cylinder 5, driving engine 6, water tank 7, fuel tank 8, auxiliary gear box 9, controllable capacity pump 10, first fix-displacement pump 11, second fix-displacement pump 12, HM Hydraulic Motor 13, wheel 14, casing 19, input shaft 20, input gear 21, intermediate gear 22, bearing 23, counter gear shaft 24, output shaft 25, output gear 26, bolt 27, bolt 28, driving compartment 29, overhead guard 30, hydraulic steering gear 31, manual multi-path reversing valve 32, outer mast 33, inner upright mounting 34, elevating ram 35, dump ram 36, pivoted arm 37, hoisting chain 38, balladeur train 39, pallet fork 40, top chock 41, step 42, rotating shaft mount pad 43, T oblique crank Z 44, bearing 45, front and back bearings 46, positioning plate 47 etc.
Like Fig. 1, shown in Figure 2; It is the hinged frame cross-country type of a kind of hydrostatic four wheel drive fork truck; For adapting to the field activity environment, therefore its total length and overall width have fore-and-aft stability and lateral stability preferably greater than conventional fork truck; Its hoisting capacity tonnage can be from 3 tons to 10 tons, and hoisting depth can be from 2.5 meters to 5 meters.
The present invention includes car body and lift system 3.Car body comprises front vehicle body 1 and aftercarriage 2, and front vehicle body 1 links to each other through the linkwork 4 of two degree of freedom and the oil cylinder 5 that turns to of two band oscillating bearing earrings with aftercarriage 2.Before and after between the car body linkwork 4 with two degree of freedom connect, even in muddy and rugged surface work, four wheels are ground connection fully, the assurance kinetic force is delivered to fully takes turns on the limit; Turn to oil cylinder 5 to control its stroke, turn over an angle, accomplish handling maneuver with car body before and after the control by all-hydraulic steering gear 31.Arrange lift system 3 and driving compartment 29 on the front vehicle body 1, aftercarriage 2 is a piggyback pod, arranges mechanisms such as driving engine 6, auxiliary gear box 9 and Hydraulic Pump, valve.
Power part of the present invention all is arranged in the aftercarriage 2, adopts the full hydraulic transmission.Like Fig. 3, shown in Figure 4, be furnished with driving engine 6, water tank 7 and fuel tank 8 in the aftercarriage 2, driving engine 6 adopts diesel motor, and the flywheel end of driving engine 6 is connected with auxiliary gear box 9, promotes multiple pump through auxiliary gear box 9.
The mouth of auxiliary gear box 9 is connected with three oil pumps, is respectively controllable capacity pump 10, first fix-displacement pump 11 and second fix-displacement pump 12.Controllable capacity pump 10 links to each other with four HM Hydraulic Motors 13, and first fix-displacement pump 11 links to each other with lift system 3, and second fix-displacement pump 12 links to each other with steering swivel system.Steering swivel system comprises the hydraulic steering gear 31 that is installed in the driving compartment 29, and the input end of hydraulic steering gear 31 links to each other with second fix-displacement pump 12, and the mouth of hydraulic steering gear 31 turns to oil cylinder 5 to link to each other with two respectively.
As shown in Figure 9, controllable capacity pump 10 drives four HM Hydraulic Motors 13 of running gear through direction reverser with the pressure of 250bar.First fix-displacement pump 11 is with the elevating ram 35 and dump ram 36 of the force lift system 3 of 160bar.Second fix-displacement pump 12 promotes to turn to oil cylinder 5 with the pressure of 60bar through all-hydraulic steering gear 31; Its pressure oil promotes the brake cylinder of HM Hydraulic Motor 13 simultaneously through steering unit.Three pumps are formed different loops, thereby make main frame obtain best serviceability.
Like Fig. 5 ~ shown in Figure 8, auxiliary gear box 9 comprises the casing 19 of flats, and an input shaft 20 and three output shafts 25 are installed in the casing 19.Input shaft 20 engages through coupler external gear and the coupler inner gear that is installed on driving engine 6 flywheels.Input gear 21 is installed on the input shaft 20, on each output shaft 25 output gear 26 is installed, input gear 21 is respectively through three intermediate gears 22 and three output gear 26 engaged transmission.Input shaft 20 rotates with driving engine 6 flywheels synchronously; Make input gear 21 drive 22 rotations of three groups of intermediate gears; Intermediate gear 22 is installed on the fixing counter gear shaft 24 through bearing 23; Three intermediate gears 22 drive three output shafts 25 and output gear 26 rotations, and three output shafts 25 link to each other with three oil pumps respectively.The axle head of three output shafts 25 all is a hollow, and the axle head of three oil pumps stretches into the axle head of three output shafts 25 respectively and links to each other.
Walking driver element of the present invention adopts the hydraulic motor with inner curved piston 13 of four low-speed bigs; Controllable capacity pump 10 is formed the positive displacement speed control loop with HM Hydraulic Motor 13; Constitute the closed loop system of the high moment of torsion of high efficiency, controllable capacity pump 10 is by the speed of travel of the artificial adjustment of driver flow with the control fork truck.Be furnished with two wheels 14 on front vehicle body 1 and the aftercarriage 2 respectively, wheel 14 adopts large diameter cross-country wheel.Like Figure 10, shown in Figure 11, each wheel 14 is directly installed on the mouth of HM Hydraulic Motor 13 respectively through 5 bolts 28, and HM Hydraulic Motor 13 then is installed on the body through 10 bolts 27.This traveling gear has been simplified the form of the HM Hydraulic Motor of common employing through the wheel reduction gear geared wheel.The total thrust of four HM Hydraulic Motors 13 can reach 800 ~ 2000 kilograms by different lifting tonnages, to adapt to the field activity condition.The wheel limit thrust that each wheel is 200～500 kilograms can guarantee under the fully loaded situation, ascend 30 ° abrupt slope of the present invention.
Like Figure 12, shown in Figure 13, be furnished with driving compartment 29 on the front vehicle body 1, driving compartment 29 tops are overhead guards 30.Be provided with control mechanisms such as all-hydraulic steering gear 31, manual multi-path reversing valve 32 and the speed of travel, braking in the driving compartment 29.The place ahead of front vehicle body 1 is connected with lift system 3,
Like Figure 14, Figure 15 and shown in Figure 16; Lift system 3 among the present invention is identical with the general form fork truck, comprises door frame, lifting mechanism, dump ram 36 and pallet fork 40, and door frame is hinged on the front vehicle body 1 through pivoted arm 37 and dump ram 36; And 37 revolutions of arm that can rotate, accomplish tilting action.Door frame is installed in operator's dead ahead, is the all-around visibility structure.Pallet fork 40 is installed on the door frame through lifting mechanism.
Door frame bottom terrain clearance is increased to 250 millimeter, and the door frame bottom can not stopped that four wheels 14 still can infallible ground kiss the earth on hollow heavy road face even guaranteed the present invention by the mound stone.Door frame comprises outer mast 33 and inner upright mounting 34, and pallet fork 40 is installed on the inner upright mounting 34 through balladeur train 39, and inner upright mounting 34 is installed on the outer mast 33 through hoisting chain 38 and elevating ram 35.Elevating ram 35 and dump ram 36 are controlled manual multi-path reversing valve 32 operations by the operator.
Like Figure 17, shown in Figure 180; Linkwork 4 between front vehicle body 1 and the aftercarriage 2 comprises the T oblique crank Z 44 that is made up of vertical pivot and horizontal shaft; The two ends of the vertical pivot of T oblique crank Z 44 are installed in respectively in top chock 41 and the step 42, and the horizontal shaft of T oblique crank Z 44 is installed in the rotating shaft mount pad 43.Top chock 41 and step 42 are installed in the rear of front vehicle body 1, and rotating shaft mount pad 43 is installed in the place ahead of aftercarriage 2.
T oblique crank Z 44 is installed in top chock 41 and the step 42 through two bearings 45 up and down, can guarantee its swing in horizontal surface; The horizontal shaft of T oblique crank Z 44 then can rotate in front and back bearings 46, thereby makes the degree of freedom that has both direction between front vehicle body 1 and the aftercarriage 2.Positioning plate 47 is installed on the horizontal shaft of T oblique crank Z 44, and the amplitude of swinging up and down of car body was not more than 40 ° before and after 47 of positioning plates defined.Left and right directions swing between the car body of front and back is controlled by the all-hydraulic steering gears 31 in the driving compartment 29 and is turned to oil cylinder 5 to accomplish; Before and after the above-below direction swing of car body be to follow ground-surface height decision, thereby make four wheels 14 of the present invention can be on rugged ground abundant ground connection, and have good off-road capability.
Claims (10)
1. the hinged frame cross-country type of hydrostatic four wheel drive fork truck; Comprise car body and lift system (3); It is characterized in that: said car body comprises front vehicle body (1) and aftercarriage (2), and said front vehicle body (1) links to each other through the linkwork (4) of two degree of freedom and the oil cylinder (5) that turns to of two band oscillating bearing earrings with said aftercarriage (2); Be furnished with two wheels (14) respectively on said front vehicle body (1) and the said aftercarriage (2), each said wheel (14) is installed in the mouth of a HM Hydraulic Motor (13) respectively; Be furnished with driving compartment (29) on the said front vehicle body (1), the place ahead of said front vehicle body (1) is connected with said lift system (3); Be furnished with driving engine (6) on the said aftercarriage (2); The flywheel end of said driving engine (6) is connected with auxiliary gear box (9); The mouth of said auxiliary gear box (9) is connected with three oil pumps, is respectively controllable capacity pump (10), first fix-displacement pump (11) and second fix-displacement pump (12), and said controllable capacity pump (10) links to each other with four said HM Hydraulic Motors (13); Said first fix-displacement pump (11) links to each other with said lift system (3), and said second fix-displacement pump (12) links to each other with steering swivel system.
2. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 1 fork truck, it is characterized in that: said driving engine (6) adopts diesel motor.
3. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 1 fork truck; It is characterized in that: said auxiliary gear box (9) comprises casing (19); An input shaft (20) and three output shafts (25) are installed in the said casing (19); Input gear (21) is installed on the said input shaft (20); On each said output shaft (25) output gear (26) is installed, through three intermediate gears (22) and three said output gears (26) engaged transmission, said three output shafts (25) link to each other with said three oil pumps respectively said input gear (21) respectively.
4. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 3 fork truck; It is characterized in that: the axle head of said three output shafts (25) all is a hollow, and the axle head of said three oil pumps stretches into the axle head of said three output shafts (25) respectively and links to each other.
5. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 1 fork truck; It is characterized in that: said lift system (3) comprises door frame, lifting mechanism, dump ram (36) and pallet fork (40); Said door frame is hinged on the said front vehicle body (1) through pivoted arm (37) and dump ram (36), and said pallet fork (40) is installed on the said door frame through said lifting mechanism.
6. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 5 fork truck; It is characterized in that: said door frame comprises outer mast (33) and inner upright mounting (34); Said pallet fork (40) is installed on the said inner upright mounting (34) through balladeur train (39), and said inner upright mounting (34) is installed on the said outer mast (33) through hoisting chain (38) and elevating ram (35).
7. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 1 fork truck; It is characterized in that: said steering swivel system comprises the hydraulic steering gear (31) that is installed in the said driving compartment (29); The input end of said hydraulic steering gear (31) links to each other with said second fix-displacement pump (12), and the mouth of said hydraulic steering gear (31) links to each other with two said oil cylinders (5) that turn to respectively.
8. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 1 fork truck; It is characterized in that: said linkwork (4) comprises the T oblique crank Z (44) that is made up of vertical pivot and horizontal shaft; The two ends of the vertical pivot of said T oblique crank Z (44) are installed in respectively in top chock (41) and the step (42), and the horizontal shaft of said T oblique crank Z (44) is installed in the rotating shaft mount pad (43).
9. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 8 fork truck; It is characterized in that: said top chock (41) and said step (42) are installed in the rear of said front vehicle body (1), and said rotating shaft mount pad (43) is installed in the place ahead of said aftercarriage (2).
10. according to the hinged frame cross-country type of the described hydrostatic four wheel drive of claim 8 fork truck, it is characterized in that: positioning plate (47) is installed on the horizontal shaft of said T oblique crank Z (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210035902XA CN102583193A (en) | 2012-02-17 | 2012-02-17 | Off-road type forklift with hydrostatic four-wheel drive and articulated frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210035902XA CN102583193A (en) | 2012-02-17 | 2012-02-17 | Off-road type forklift with hydrostatic four-wheel drive and articulated frame |
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| CN102583193A true CN102583193A (en) | 2012-07-18 |
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| CN201210035902XA Pending CN102583193A (en) | 2012-02-17 | 2012-02-17 | Off-road type forklift with hydrostatic four-wheel drive and articulated frame |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992232A (en) * | 2012-12-12 | 2013-03-27 | 缪慰时 | Preposed connecting rod type rough terrain lift truck |
| CN103288010A (en) * | 2013-05-30 | 2013-09-11 | 安徽德摩新能源叉车股份有限公司 | Forklift structure |
| WO2014043936A1 (en) * | 2012-09-20 | 2014-03-27 | 中联重科股份有限公司 | Vehicle frame, multi-axle vehicle chassis and engineering machinery |
| CN104310281A (en) * | 2014-08-28 | 2015-01-28 | 缪慰时 | Internal combustion engine driven large-tonnage hydrostatic four-way forklift |
| CN108501697A (en) * | 2017-02-27 | 2018-09-07 | 迪尔公司 | Hydraulic pressure group auxiliary drive component |
| CN109398006A (en) * | 2018-11-29 | 2019-03-01 | 襄阳协利成机车车辆工程设备有限公司 | Railway bogie drive system |
| CN110790195A (en) * | 2019-11-27 | 2020-02-14 | 安徽维德电源有限公司 | Integrated power system of electric forklift and whole-vehicle arrangement method thereof |
| CN110790196A (en) * | 2019-11-27 | 2020-02-14 | 安徽维德电源有限公司 | Medium-large tonnage electric forklift integrated power system and control method thereof |
| CN113800437A (en) * | 2020-06-15 | 2021-12-17 | 苏州先锋物流装备科技有限公司 | Hydraulic system for multidirectional forklift and multidirectional forklift |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014043936A1 (en) * | 2012-09-20 | 2014-03-27 | 中联重科股份有限公司 | Vehicle frame, multi-axle vehicle chassis and engineering machinery |
| CN102992232A (en) * | 2012-12-12 | 2013-03-27 | 缪慰时 | Preposed connecting rod type rough terrain lift truck |
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| CN104310281A (en) * | 2014-08-28 | 2015-01-28 | 缪慰时 | Internal combustion engine driven large-tonnage hydrostatic four-way forklift |
| CN104310281B (en) * | 2014-08-28 | 2016-09-14 | 缪慰时 | Internal combustion drives large-tonnage hydrostatic four-way fork truck |
| CN108501697A (en) * | 2017-02-27 | 2018-09-07 | 迪尔公司 | Hydraulic pressure group auxiliary drive component |
| CN108501697B (en) * | 2017-02-27 | 2022-08-30 | 迪尔公司 | Hydraulic group auxiliary driving assembly |
| CN109398006A (en) * | 2018-11-29 | 2019-03-01 | 襄阳协利成机车车辆工程设备有限公司 | Railway bogie drive system |
| CN109398006B (en) * | 2018-11-29 | 2023-12-26 | 襄阳城雷机电工程有限公司 | Railway bogie driving system |
| CN110790195A (en) * | 2019-11-27 | 2020-02-14 | 安徽维德电源有限公司 | Integrated power system of electric forklift and whole-vehicle arrangement method thereof |
| CN110790196A (en) * | 2019-11-27 | 2020-02-14 | 安徽维德电源有限公司 | Medium-large tonnage electric forklift integrated power system and control method thereof |
| CN113800437A (en) * | 2020-06-15 | 2021-12-17 | 苏州先锋物流装备科技有限公司 | Hydraulic system for multidirectional forklift and multidirectional forklift |
| CN113800437B (en) * | 2020-06-15 | 2023-04-18 | 苏州先锋物流装备科技有限公司 | Hydraulic system for multidirectional forklift and multidirectional forklift |
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Application publication date: 20120718 |