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CN203015414U - Double-layer frame of field operation vehicle - Google Patents

Double-layer frame of field operation vehicle Download PDF

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Publication number
CN203015414U
CN203015414U CN 201220748873 CN201220748873U CN203015414U CN 203015414 U CN203015414 U CN 203015414U CN 201220748873 CN201220748873 CN 201220748873 CN 201220748873 U CN201220748873 U CN 201220748873U CN 203015414 U CN203015414 U CN 203015414U
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CN
China
Prior art keywords
oil circuit
oil
wheel drive
frame
double
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Withdrawn - After Issue
Application number
CN 201220748873
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Chinese (zh)
Inventor
杨仲雄
高福强
李明强
李彦良
胡璇
邵树有
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Lion Agricultural Equipment Co Ltd
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Lion Agricultural Equipment Co Ltd
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Priority to CN 201220748873 priority Critical patent/CN203015414U/en
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Publication of CN203015414U publication Critical patent/CN203015414U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model relates to a double-layer frame of a field operation vehicle; the double-layer frame is characterized by comprising a travelling frame used for installing travelling wheels, and an operation frame used for installing operation equipment, wherein the operation frame is arranged at the upper side of the travelling frame, and is connected with the travelling frame by a lifting mechanism; the travelling frame comprises a left travelling beam and a right travelling beam; the lifting mechanism comprises a plurality of lifting columns which are respectively and evenly distributed on the two travelling beams; and the operation frame is provided with a connecting mechanism which is respectively connected with a low-position operation device and a high-position operation machine. The double-layer frame of the field operation vehicle can be respectively used for a transplanter and a field nursing machine, and has the characteristics of being simple in structure, convenient to use and low in cost.

Description

A kind of double-deck vehicle frame of field operating vehicle
Technical field
The utility model relates to a kind of farm machinery, especially relates to a kind of multifunctional agricultural machine.
Background technology
Rice transplanter is one of the most frequently used mechanism in agricultural mechanism, and field cleaning device (mainly referring to fertilizer distributor, vehicle-mounted sprayer) also is widely used.The Chinese patent that is CN101611668 as publication number discloses a kind of fertilizer distributor, and publication number is that the Chinese patent of CN102450131 discloses a kind of agricultural fertilizer applicator.Existing rice transplanter and field cleaning device are two independently equipment, and cost is higher.Because the characteristics of transplanting work have determined its frame the end of than, and the field cleaning device is generally to grow to higher just use afterwards crop, thus its frame need higher, the structure on frame as far as possible can not with the crop interference.Therefore, existing rice transplanter and field cleaning device can not be realized on an equipment.
In addition, existing rice transplanter use machine driving without exception, this kind of drive are with the accuracy of its transmission, and ripe technology is well received.But its complicated transmission mechanism has restricted rice transplanter to be developed to multifunction, has also promoted its maintenance cost.
Summary of the invention
The utility model is mainly to solve arriving mutually independently of the existing rice transplanter of prior art and field cleaning device, cost is higher, and the frame of existing rice transplanter is the end of than, and the technical problem that the bracket height of field cleaning device is had relatively high expectations, provide a kind of and can be respectively used to rice transplanter and field cleaning device, and the double-deck vehicle frame of field operating vehicle simple in structure, easy to use.
above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of double-deck vehicle frame of field operating vehicle, it is characterized in that it is made of the operation frame that is used for the walker of road wheel being installed and being used for installation exercise equipment, operation frame is located at the upside of walker, and be connected by an elevating mechanism between walker, described walker is made of two of left and right walking beam, described elevating mechanism comprises several lifting columns, this lifting column is evenly distributed on two walking beams, described operation frame is provided with the bindiny mechanism that can be respectively be connected with low level implement and high-order homework machinery.When operation frame connects rice transplanting mechanism (or other need at the equipment of lower operation), operation frame is in lowest order; When operation frame connects field care institutions vibrations (or other needs the equipment of operation aloft), when the operation such as applying fertilizer, because this operation is generally all carried out to certain phase in plant growth, the plant height that is in this moment is higher, and the height of chassis above ground during rice transplanting can not meet the demands.Just need operation frame to raise under the effect of elevating mechanism.Only have the walking beam of left and right sides due to the walker of the technical program, there is no crossbeam, in use, the walking beam of left and right sides is in the gap of crop, and not with the crop interference, therefore, the height of operation frame has determined the effective depth of this vehicle frame.The Height Adjustment of operation frame by lifting column stretch complete.
As preferably, described lifting column is lifting hydraulic cylinder, and each walking beam is provided with former and later two described lifting hydraulic cylinders, and this hydraulic cylinder is connected with fluid power system.Hydraulic cylinder is as lifting column, and it is easy to use, the power arrangement convenience.
As preferably, the power of described hydraulic-driven system is provided by electric hydraulic pump or hydraulic hand-pump.Adopt electric hydraulic pump to have easy to use, simple to operate is preferred, but because the frequency of high-low-position conversion of the present utility model is very low, in order to reach the saving cost, reduces the purpose of the fault rate of equipment, and the utility model also can adopt hydraulic hand-pump.
As preferably, the rear and front end of the left and right sides of described operation frame is respectively equipped with connecting hole on fixed head, the rear and front end of the both sides walking beam of described walker also is respectively equipped with connecting hole under fixed head, under the fixed head in each orientation on the fixed head of connecting hole and corresponding orientation connecting hole corresponding.When operation frame was in the working depth of field care institutions vibrations, more firm for making its structure, the technical program was provided with the upper and lower connecting hole of fixed head, by the upper and lower connecting hole of this fixed head, fixed head is set, and connected operation frame and walker.
As preferably, the downside of the walking beam upside of the left and right side of described walker or the left and right curb girder of operation frame is provided with damping fin.This damping fin makes operation frame when dropping to the bottom, can directly not clash into mutually with walker, makes it have a cushioning effect.Simultaneously, also play the effect that hinders the relative sliding between operation frame and walker, effectively reduced operation frame or walker when the impact that is subject to horizontal direction, the impact that the lifting oil pressure is suffered.
as preferably, described fluid power system comprises fuel tank, oil pump, some magnetic valves and some motors, it is characterized in that it comprises the front-wheel drive oil circuit, the rear wheel drive oil circuit, operation oil circuit and jacking oil circuit, described front-wheel drive oil circuit is connected with two front-wheel drive motors, be provided with a synchronous valve between two front-wheel drive motors, described rear wheel drive oil circuit is connected with two rear wheel drive motors, also be provided with synchronous valve between two rear wheel drive motors, described operation oil circuit is connected with an operation motor, described jacking oil circuit is connected with described lifting hydraulic cylinder.The utility model forms the 4 wheel driven structure by two front-wheel drive motors and two rear wheel drive motors drive wheel separately, this type of drive very flexibly and power powerful, be conducive to it and adapt to various operating conditions.Between two front-wheel drive motors and the synchronous valve that is provided with between two rear wheel drive motors guaranteed in advancing or falling back process, the synchronism between the left and right sides wheel.Simultaneously, due at rice transplanter in steering procedure, different to the reaction force of oil piping system between left and right wheels, just in time by the balanced action of synchronous valve, the nearside wheel rotating speed when making it realize turning is slower than outboard wheel, reaches smooth, the effect of turning flexibly.
As preferably, described front-wheel drive oil circuit comprises forerunner's pump and a H type three position four-way directional control valve, the oil-in of this three position four-way directional control valve is connected with forerunner's pump, and oil return opening is connected with the oil inlet end of described operation oil circuit, and actuator port is connected with two front-wheel drive motors respectively; Described rear wheel drive oil circuit comprises a rear-guard pump and a H type three position four-way directional control valve, the oil-in of this three position four-way directional control valve is connected with the rear-guard pump, oil return opening is connected with the oil inlet end of described operation oil circuit, and actuator port is connected with two rear wheel drive motors respectively.No matter above-mentioned three position four-way directional control valve is in forward oil circuit or reverse oil circuit, its oil return all by transplanting oil circuit (being a kind of of operation oil circuit, lower same), utilizes front and rear wheel to drive the oil return of oil circuit, the work of driving implanting mechanism, when this three position four-way directional control valve is in meta, because this three position four-way directional control valve is the H type, at this moment, oil-feed and the oil return circuit of front and rear wheel are directly connected, the front and rear wheel CD-ROM drive motor quits work, and at this moment, this hydraulic circuit can drive implanting mechanism work.The oil return that the utility model utilizes front and back wheel to drive oil circuit drives implanting mechanism, has simplified on the one hand the working oil path of implanting mechanism, and on the other hand, this mode has realized the interlock of implanting mechanism and wheel walking, and has guaranteed the proportionate relationship between them.When walking, can also cut wheel drive or rear wheel drive by the three position four-way directional control valve of adjusting on front-wheel drive oil circuit or rear wheel drive oil circuit on different road surfaces.
As preferably, this system comprises and turns to oil circuit, turns to oil circuit to be connected with steering motor, and described jacking oil circuit is provided with a M type three position four-way directional control valve, and the oil-out of this three position four-way directional control valve is connected with the oil inlet end that turns to oil circuit.The steering mechanism of rice transplanter can complete by mechanical mechanism, also can complete by the oil circuit that turns to of the technical program.The jacking oil circuit turns to by the oil return driving of jacking oil circuit, and when M type three-position four-way valve was in meta, two actuator ports of jacking cylinder all sealed, and the oil-in of jacking oil circuit and oil return opening are connected, and the jacking pump directly drives steering motor work.Because the lifting of vehicle frame is few function of using, the technical program makes jacking cylinder be in for a long time closed state, and turn to oil circuit general with rise pump and directly drive.
As preferably, be parallel with respectively overflow valve, choke valve between the oil inlet end of described operation motor and oil revolving end, and two position two-way valve.Overflow valve has protective effect to the operation motor; choke valve can be shunted the oil mass of operation motor; it can be controlled operating speed; when the utility model is used for rice transplanter; after the aperture of a choke valve of setting; due to the relation of operation oil circuit and front and rear wheel driving oil circuit, regardless of the pace of rice transplanter, the spacing of its rice transplanting is fixed.That is to say, the control of spacing is completed by the aperture of regulating choke valve.Operation is very easy to make it.When two position two-way valve is in closed valve position, the transplanting motor operations, when two position two-way valve is in the connection valve position, hydraulic circuit emptying, the operation motor is not worked.
The beneficial effect that brings of the present utility model is, solved arriving mutually of the existing rice transplanter of prior art and field cleaning device independent, cost is higher, and the frame of existing rice transplanter is the end of than, and the technical problem that the bracket height of field cleaning device is had relatively high expectations, realized a kind ofly can being respectively used to rice transplanter and field cleaning device, and the double-deck vehicle frame of a kind of field operating vehicle simple in structure, easy to use.
Description of drawings
Accompanying drawing 1 is a kind of front view of the present utility model;
Accompanying drawing 2 is a kind of left views of the present utility model;
Accompanying drawing 3 is structural representations of hydraulic system of the present utility model.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1:
As shown in Figure 1 and Figure 2, the utility model is a kind of double-deck vehicle frame of field operating vehicle, it is made of the operation frame 1-1 that is used for the walker 1-2 of road wheel being installed and being used for installation exercise equipment, operation frame 1-1 is located at the upside of walker 1-2, and be connected by an elevating mechanism between walker 1-2, described walker is made of two of left and right walking beam, and described elevating mechanism comprises four lifting hydraulic jack 2-21, and this lifting hydraulic jack 2-21 is arranged on two walking beams in twos.This lifting hydraulic jack is connected with hydraulic hand-pump.The rear and front end of the left and right sides of operation frame is respectively equipped with connecting hole on fixed head, the rear and front end of the both sides walking beam of described walker also is respectively equipped with connecting hole under fixed head, under the fixed head in each orientation on the fixed head of connecting hole and corresponding orientation connecting hole corresponding.When operation frame rise to topmost carry out operation before, by mounting plate 1-3 under connecting hole on fixed head and fixed head, to limit its position.The walking beam upside of the left and right side of connecting hole walker is provided with damping fin.Operation frame is provided with the bindiny mechanism that can be respectively be connected with fertilizer distributor with rice transplanter.
Embodiment 2:
As shown in Figure 3, the utility model is a kind of double-deck vehicle frame of field operating vehicle, it is made of the operation frame that is used for the walker of road wheel being installed and being used for installation exercise equipment, operation frame is located at the upside of walker, and be connected by an elevating mechanism between walker, described walker is made of two of left and right walking beam, and described elevating mechanism comprises four lifting hydraulic jacks, and this lifting hydraulic jack is arranged on two walking beams in twos.This lifting hydraulic cylinder is connected with fluid power system.Fluid power system comprises fuel tank 2-15, oil pump, some magnetic valves and some motors, it comprises front-wheel drive oil circuit, rear wheel drive oil circuit, transplanting oil circuit, transplanting section's lifting oil circuit, jacking oil circuit and turns to oil circuit, described front-wheel drive oil circuit is connected with two front-wheel drive motor 2-1, be provided with a synchronous valve 2-3 between two front-wheel drive motor 2-1, described rear wheel drive oil circuit is connected with two rear wheel drive motor 2-2, also be provided with synchronous valve 2-3 between two rear wheel drive motor 2-2, described transplanting oil circuit is connected with a transplanting motor 2-8.Be parallel with respectively overflow valve 2-7, choke valve 2-6 between the oil inlet end of transplanting motor and oil revolving end, and two position two-way valve 2-5.The front-wheel drive oil circuit comprises forerunner's pump 2-10 and a H type three position four-way directional control valve 2-4, the oil-in of this three position four-way directional control valve 2-4 is connected with forerunner's pump 2-1, oil return opening is connected with the oil inlet end of described transplanting oil circuit, and actuator port is connected with two front-wheel drive motor 2-1 respectively; Described rear wheel drive oil circuit comprises a rear-guard pump 2-11 and a H type three position four-way directional control valve 2-4, the oil-in of this three position four-way directional control valve 2-4 is connected with rear-guard pump 2-11, oil return opening is connected with the oil inlet end of described transplanting oil circuit, and actuator port is connected with two rear wheel drive motor 2-2 respectively; Transplanting section promotes oil circuit and is provided with an elevator pump 2-12, and this transplanting section promotes oil circuit and is connected with lift cylinder 2-14; Described jacking oil circuit is connected with four jacking cylinder 2-21, turn to oil circuit to be connected with steering motor, described jacking oil circuit is provided with a M type three position four-way directional control valve 2-22, the oil-out of this three position four-way directional control valve 2-22 is connected with the oil inlet end that turns to oil circuit, and this turns to oil circuit to be connected with a steering motor 2-9.Each front-wheel drive motor 2-1 and rear wheel drive motor 2-2 are equipped with the by-pass cock 2-17 of a high low or first gear, this by-pass cock 2-17 is connected with a hydraulic cylinder 2-18, this hydraulic cylinder 2-18 is connected with a hydraulically powered high/low pressure cut-over valve 2-19, this high/low pressure cut-over valve 2-19 drives port and is connected with an oil control transfer valve 2-16, one of two oil inlet end of this oil control transfer valve 2-16 are connected with the oil inlet end that promotes oil circuit, and another is connected with the oil outlet end that turns to oil circuit, front-wheel drive oil circuit, rear wheel drive oil circuit and transplanting oil circuit.Forerunner's pump 2-10, rear-guard pump 2-11, elevator pump 2-12 and steering pump 2-13 are combined into one four and connect pump, and wherein forerunner's pump and rear-guard pump are provided with a linkage regulating valve 2-20.The rear and front end of the left and right sides of operation frame is respectively equipped with connecting hole on fixed head, the rear and front end of the both sides walking beam of described walker also is respectively equipped with connecting hole under fixed head, under the fixed head in each orientation on the fixed head of connecting hole and corresponding orientation connecting hole corresponding.The walking beam upside of the left and right side of walker is provided with damping fin.Operation frame is provided with the bindiny mechanism that can be respectively be connected with fertilizer distributor with rice transplanter.
Vehicle frame of the present utility model is connecting rice transplanting mechanism, and when carrying out transplanting work, operation frame is in lowest order; When this vehicle frame connects the field care institutions vibrations, apply fertilizer when waiting operation, because this operation is generally all carried out to certain phase in plant growth, be in plant height at this moment higher, the height of chassis above ground during rice transplanting can not meet the demands.Just need operation frame to raise under the effect of elevating mechanism.Because the walker of the technical program only has the left and right curb girder, there is no crossbeam, in use, the left and right curb girder is in the gap of crop, and not with the crop interference, therefore, the height of operation frame has determined the effective depth of this vehicle frame.For making its structure more firm, the utility model also is provided with the upper and lower connecting hole of fixed head, by the upper and lower connecting hole of this fixed head, fixed head 5 is set and connects operation frame and walker.
This fluid power system in use, by two front-wheel drive motors and two rear wheel drive motors drive wheel separately, form the 4 wheel driven structure, between two front-wheel drive motors and the synchronous valve that is provided with between two rear wheel drive motors guaranteed in advancing or falling back process, the synchronism between the left and right sides wheel.simultaneously, due at rice transplanter in steering procedure, reaction force to oil piping system between left and right wheels is different, the just in time balanced action by synchronous valve, nearside wheel rotating speed when making it realize turning is slower than outboard wheel, reach smooth, the effect of turning flexibly, front and back wheel drives the oil return of oil circuit all by the transplanting oil circuit, before utilization, the oil return of rear wheel drive oil circuit, the work of driving implanting mechanism, when this three position four-way directional control valve is in meta, before, oil-feed and the oil return circuit of trailing wheel are directly connected, before, the rear wheel drive motor quits work, at this moment, this hydraulic circuit can drive implanting mechanism work.The oil return that the utility model utilizes front and back wheel to drive oil circuit drives implanting mechanism, has simplified on the one hand the working oil path of implanting mechanism, and on the other hand, this mode has realized the interlock of implanting mechanism and wheel walking, and has guaranteed the proportionate relationship between them.When walking, can also cut wheel drive or rear wheel drive by the three position four-way directional control valve of adjusting on front-wheel drive oil circuit or rear wheel drive oil circuit on different road surfaces.Top gear is not operation of rice transplanter, and the gear of walking on the road surface, low or first gear are the gear of rice transplanter when operation.When high/low pressure cut-over valve drives port and controls transfer valve and be connected with the oil inlet end of lifting oil circuit by oil, can drive the high/low pressure cut-over valve action, and then drive the action of above-mentioned hydraulic cylinder, make it drive high low or first gear by-pass cock action, make the front and rear wheel CD-ROM drive motor enter high-speed rotation, otherwise, when high/low pressure cut-over valve driving port was connected with the oil outlet end that turns to oil circuit, front-wheel drive oil circuit, rear wheel drive oil circuit and transplanting oil circuit by oil control transfer valve, the front and rear wheel CD-ROM drive motor entered and slowly runs.Jacking oil circuit of the present utility model is the driving mechanism of mechanism's lifting, it is conducive to realize the multifunction of rice transplanter, as using as the field cleaning device, when it uses as the field cleaning device, improve the height of vehicle frame by lifting body, so that vehicle frame does not damage the crop that has grown to certain altitude, then the implanting mechanism with rice transplanter changes field care appliances (as fertilizer distributor) into.
So the utlity model has diverse in function, simple in structure, easy to use, the features such as stabilized structure.

Claims (10)

1. the double-deck vehicle frame of a field operating vehicle, it is characterized in that it is made of the operation frame that is used for the walker of road wheel being installed and being used for installation exercise equipment, operation frame is located at the upside of walker, and be connected by an elevating mechanism between walker, described walker is made of two of left and right walking beam, described elevating mechanism comprises several lifting columns, this lifting column is evenly distributed on two walking beams, and described operation frame is provided with the bindiny mechanism that can be respectively be connected with low level implement and high-order homework machinery.
2. the double-deck vehicle frame of a kind of field operating vehicle according to claim 1, is characterized in that described lifting column is lifting hydraulic cylinder, and each walking beam is provided with former and later two described lifting hydraulic cylinders, and this hydraulic cylinder is connected with fluid power system.
3. the double-deck vehicle frame of a kind of field operating vehicle according to claim 2, is characterized in that the power that described hydraulic-driven is is provided by electric hydraulic pump or hydraulic hand-pump.
4. the double-deck vehicle frame of according to claim 1 and 2 or 3 described a kind of field operating vehicles, the rear and front end that it is characterized in that the left and right sides of described operation frame is respectively equipped with connecting hole on fixed head, the rear and front end of the both sides walking beam of described walker also is respectively equipped with connecting hole under fixed head, under the fixed head in each orientation on the fixed head of connecting hole and corresponding orientation connecting hole corresponding.
5. the double-deck vehicle frame of according to claim 1 and 2 or 3 described a kind of field operating vehicles is characterized in that the downside of the left and right curb girder of the walking beam upside of left and right side of described walker or operation frame is provided with damping fin.
6. the double-deck vehicle frame of a kind of field operating vehicle according to claim 4 is characterized in that the downside of the left and right curb girder of the walking beam upside of left and right side of described walker or operation frame is provided with damping fin.
7. the double-deck vehicle frame of a kind of field operating vehicle according to claim 2, it is characterized in that described fluid power system comprises fuel tank, oil pump, some magnetic valves and some motors, it is characterized in that it comprises the front-wheel drive oil circuit, the rear wheel drive oil circuit, operation oil circuit and jacking oil circuit, described front-wheel drive oil circuit is connected with two front-wheel drive motors, be provided with a synchronous valve between two front-wheel drive motors, described rear wheel drive oil circuit is connected with two rear wheel drive motors, also be provided with synchronous valve between two rear wheel drive motors, described operation oil circuit is connected with an operation motor, described jacking oil circuit is connected with described lifting hydraulic cylinder.
8. the double-deck vehicle frame of a kind of field operating vehicle according to claim 7, it is characterized in that described front-wheel drive oil circuit comprises forerunner's pump and a H type three position four-way directional control valve, the oil-in of this three position four-way directional control valve is connected with forerunner's pump, oil return opening is connected with the oil inlet end of described operation oil circuit, and actuator port is connected with two front-wheel drive motors respectively; Described rear wheel drive oil circuit comprises a rear-guard pump and a H type three position four-way directional control valve, the oil-in of this three position four-way directional control valve is connected with the rear-guard pump, oil return opening is connected with the oil inlet end of described operation oil circuit, and actuator port is connected with two rear wheel drive motors respectively.
9. the double-deck vehicle frame of according to claim 7 or 8 described a kind of field operating vehicles, it is characterized in that it comprises turns to oil circuit, turn to oil circuit to be connected with steering motor, described jacking oil circuit is provided with a M type three position four-way directional control valve, and the oil-out of this three position four-way directional control valve is connected with the oil inlet end that turns to oil circuit.
10. the double-deck vehicle frame of according to claim 7 or 8 described a kind of field operating vehicles is characterized in that being parallel with respectively overflow valve, choke valve between the oil inlet end of described operation motor and oil revolving end, and two position two-way valve.
CN 201220748873 2012-12-29 2012-12-29 Double-layer frame of field operation vehicle Withdrawn - After Issue CN203015414U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220748873 CN203015414U (en) 2012-12-29 2012-12-29 Double-layer frame of field operation vehicle

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Application Number Priority Date Filing Date Title
CN 201220748873 CN203015414U (en) 2012-12-29 2012-12-29 Double-layer frame of field operation vehicle

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CN 201220748873 Withdrawn - After Issue CN203015414U (en) 2012-12-29 2012-12-29 Double-layer frame of field operation vehicle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103004315A (en) * 2012-12-29 2013-04-03 莱恩农业装备有限公司 Multifunctional double-layer frame of field operation vehicle
CN103999588A (en) * 2014-06-11 2014-08-27 河南农业大学 Three-wheel fully hydraulic drive high-frame field operation vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103004315A (en) * 2012-12-29 2013-04-03 莱恩农业装备有限公司 Multifunctional double-layer frame of field operation vehicle
CN103004315B (en) * 2012-12-29 2016-02-03 莱恩农业装备有限公司 A kind of double-layer multifunctional vehicle frame of field operating vehicle
CN103999588A (en) * 2014-06-11 2014-08-27 河南农业大学 Three-wheel fully hydraulic drive high-frame field operation vehicle
CN103999588B (en) * 2014-06-11 2016-04-20 河南农业大学 Three-wheel full hydraulic drive field aerial lift vehicle

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Granted publication date: 20130626

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