CN102556163A - Height adjustment device for vehicle chassis and vehicle adopting same - Google Patents
Height adjustment device for vehicle chassis and vehicle adopting same Download PDFInfo
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- CN102556163A CN102556163A CN2011104580106A CN201110458010A CN102556163A CN 102556163 A CN102556163 A CN 102556163A CN 2011104580106 A CN2011104580106 A CN 2011104580106A CN 201110458010 A CN201110458010 A CN 201110458010A CN 102556163 A CN102556163 A CN 102556163A
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Abstract
The invention relates to the field of travelling of vehicles, and discloses a height adjustment device for a vehicle chassis. The height adjustment device comprises a frame which is fixedly connected with the vehicle chassis (10), and a support rod (4) is fixedly connected with a vehicle axle (6) in the vertical direction, wherein a parallelogram linkage mechanism is connected between the frame and the support rod (4); and the height of the frame in the vertical direction relative to the position of the wheels can be adjusted. With the adoption of the height adjustment device, the height of the vehicle chassis (10) can be automatically adjusted, the adjustment range is beyond the diameter of a tire of the wheel, the height of the vehicle chassis (10) is increased, and the trafficability for the vehicles are greatly changed, so as to adapt to the operation requirements of high-stalk crops on farmland machinery, the height of the vehicle chassis (10) also can be reduced, so as to adapt to the requirements of the crops during the initial growth period and the requirements of short crops on the field work, and the running stability of the vehicle at a high speed is also improved. The invention further provides a vehicle adopting the height adjustment device for the vehicle chassis.
Description
Technical field
The present invention relates to the vehicle to run field, particularly a kind of agri-vehicle chassis height control apparatus is so that satisfy the farm work requirement of crop growth period and long-stalked crops.
Background technology
Along with the development of Tendency of Agricultural Machinery in Chinaization and the raising day by day of living standards of the people, people have higher requirement to farm working machinery.Because after the field crops plantation; Intertillage, weeding, spray insecticide and field management operation such as fertilising all has higher requirement to the field machine crossing ability; Therefore need more urgently initiatively to adjust the vehicle chassis height significantly to improve trafficability; Along with highly increasing in the process of crop growth and the field management operations of long-stalked crops, require setting range to surpass diameter of tyres usually.There are a variety of modes to realize adjustment at present to the vehicle chassis height; Application number is that 200610018159.1 patent of invention has comprised a kind of air suspension; The variation that gas is realized chassis clearance that charges and discharge through air bellow; But adjustment amount is less, far can not satisfy the requirement of field vehicle chassis height.Application number is 200510084634.0 patent of invention; Change the height of suspension support through height controller, can adjust the passenger-car chassis height within the specific limits indirectly, improve certain traveling comfort and stability with respect to vehicle body; But complex structure, high, the poor rigidity of cost; Mainly be used on the car, and because structural limitations makes adjustment amount less, still can not satisfy field management operation in the field-crop whole growth process and can realize the requirement adjusted significantly to the vehicle chassis height.
Summary of the invention
The technical matters that (one) will solve
The technical matters that the present invention will solve provides a kind of vehicle chassis arrangement for adjusting height, realizes the variation significantly of vehicle chassis height, and setting range surpasses the wheel tyre diameter, to adapt in the process of crop growth requirement to farm working machinery.
(2) technical scheme
In order to solve the problems of the technologies described above; The invention provides a kind of vehicle chassis arrangement for adjusting height; Comprise: be used for the vehicle frame of captiveing joint with vehicle chassis; With the strut bar that the wheel of vehicle axle is captiveed joint at vertical direction, be connected with parallelogram linkage between said vehicle frame and the said strut bar; Said vehicle frame is with respect to the adjustable height of wheel position in the vertical direction.
Wherein, said vehicle frame comprises the rectilinear orbit of base plate and perpendicular captive joint, and said rectilinear orbit is installed with can be along its slide block that slides up and down;
Said parallelogram linkage comprises: be vertically fixed on the support arm of said bottom end, the last rocking bar that is articulated and connected with the last point of connection and the following point of connection of said support arm respectively and rocking bar down, the said articulated position that goes up rocking bar and the last point of connection of said support arm be positioned at said on the middle part of rocking bar; It is hinged with said strut bar respectively that said rocking bar down reaches the other end of going up rocking bar, and said rocking bar down and last rocking bar are for laterally arranging;
Said opposite end of going up rocking bar and said strut bar coupling end is hinged with connecting rod, and said rod hinge connection arrives the fixed connection point with said slide block homonymy.
Wherein, said vehicle chassis arrangement for adjusting height is that line of centers is symmetrical distribution with said rectilinear orbit.
Wherein, said slide block is connected with actuating device, and said slide block also is provided with position locking mechanism, is used to lock the height and position of said slide block with respect to said middle straight trajectory.
Wherein, said actuating device is a hydraulic efficiency gear.
Wherein, said position locking mechanism is a fluid control valve.
The present invention also provides a kind of vehicle, comprising: hard-wired two the above-mentioned vehicle chassis arrangement for adjusting height in the chassis of said vehicle, said vehicle chassis arrangement for adjusting height is installed in relative both sides, said chassis.
Wherein, said vehicle chassis arrangement for adjusting height is positioned at the rear and front end on said chassis.
Wherein, when said vehicle was climbed, the said vehicle chassis arrangement for adjusting height that is positioned at said chassis (10) front end reduced, and the said vehicle chassis arrangement for adjusting height that is positioned at rear end, said chassis (10) raises, and said chassis (10) are in horizontality;
During said vehicles go down, the said vehicle chassis arrangement for adjusting height that is positioned at said chassis (10) front end raises, and the said vehicle chassis arrangement for adjusting height that is positioned at rear end, said chassis (10) reduces, and said chassis (10) are in horizontality.
(3) beneficial effect
A kind of vehicle chassis arrangement for adjusting height that technique scheme provided; Comprise: be used for the vehicle frame of captiveing joint with vehicle chassis; With the strut bar that the wheel of vehicle axle is captiveed joint at vertical direction, be connected with parallelogram linkage between said vehicle frame and the said strut bar; Said vehicle frame is with respect to the adjustable height of wheel position in the vertical direction.This device can initiatively be adjusted the vehicle chassis height, and setting range surpasses the wheel tyre diameter, increases the vehicle chassis height, changes trafficability significantly, to adapt to plant growth middle and later periods and the long-stalked crops job requirements to farmland machinery; Reduce the vehicle chassis height,, the stability of high vehicle speeds can be provided also to adapt to the farm work requirement of plant growth initial stage and short crop.
Description of drawings
Fig. 1 is the structural representation with vehicle chassis arrangement for adjusting height of the embodiment of the invention;
Fig. 2 is the vehicle chassis fundamental diagram that the embodiment of the invention can initiatively be adjusted height;
Fig. 3 is the fundamental diagram that the embodiment of the invention increases the vehicle chassis height;
Fig. 4 is the fundamental diagram that the embodiment of the invention reduces the vehicle chassis height;
Fig. 5 is the vehicle chassis upward slope comformability schematic diagram that the embodiment of the invention can initiatively be adjusted height;
Fig. 6 is the vehicle chassis descending comformability schematic diagram that the embodiment of the invention can initiatively be adjusted height;
Wherein, 1: slide block; 2: connecting rod; 3: go up rocking bar; 4: strut bar; 5: following rocking bar; 6: axletree; 7: wheel; 8: rectilinear orbit; 9: base plate; 10: the chassis; 11: domatic;
2 ': connecting rod; 3 ': go up rocking bar; 4 ': strut bar; 5 ': following rocking bar; 6 ': axletree; 7 ': wheel.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
In conjunction with shown in Figure 1; A kind of vehicle chassis arrangement for adjusting height that provides for the embodiment of the invention; Comprise: be used for the vehicle frame of captiveing joint,, be connected with parallelogram linkage between vehicle frame and the strut bar 4 with the strut bar 4 that wheel of vehicle axle 6 is captiveed joint at vertical direction with vehicle chassis 10; Vehicle frame is with respect to the adjustable height of wheel position in the vertical direction.Being provided with of parallelogram linkage can be realized vehicle frame with respect to significantly the swinging in short transverse of wheel position, thereby realizes the adjusting of vehicle chassis 10 height.
Vehicle frame (in the accompanying drawing vehicle frame be shaped as inverted T shape) comprises the rectilinear orbit 8 of base plate 9 and perpendicular captive joint, and rectilinear orbit 8 is installed with can be along its slide block that slides up and down 1; Parallelogram linkage comprises: be vertically fixed on the support arm of base plate 9 ends, the last rocking bar 3 that is articulated and connected with the last point of connection and the following point of connection of support arm respectively and rocking bar 5 down, the articulated position of the last point of connection of last rocking bar 3 and support arm is positioned at the middle part of rocking bar 3; It is hinged with strut bar 4 respectively that following rocking bar 5 reaches the other end of going up rocking bar 3, and following rocking bar 5 and last rocking bar 3 are for laterally arranging; Last rocking bar 3 is hinged with connecting rod 2 with the opposite end of strut bar 4 coupling ends, and connecting rod 2 is hinged to the fixed connection point with slide block 1 homonymy.
The vehicle chassis arrangement for adjusting height that present embodiment provides both can be to be connected with independent wheel 7, also can be arranged to left-right symmetric, was connected with the wheel of its both sides simultaneously, and realization is integrally-regulated to vehicle chassis 1 one sides.
Preferably; The vehicle chassis arrangement for adjusting height is that line of centers is symmetrical distribution with the rectilinear orbit, and concrete structure is referring to the annexation between slide block 1, connecting rod 2, last rocking bar 3, strut bar 4, following rocking bar 5, axletree 6, wheel 7 and each parts of vehicle frame in the accompanying drawing 1.Vehicle frame be provided with base plate 9 with base plate 9 vertical rectilinear orbits of dividing equally 8 and vertical with base plate 9 respectively left support arm CD, right support arm EF; Two support arms are provided with upper left point of connection C, a left side point of connection D, upper right point of connection E, bottom right point of connection F down; Two arm length equate CD=EF; C, D, E, 4 of F are positioned on four summits of a rectangle; A left side support arm CD and right support arm EF are about rectilinear orbit 8 symmetries, and rectilinear orbit 8 is positioned at the vehicle central plane and is in same plane with left support arm CD, right support arm EF, and rectilinear orbit 8 length are usually greater than the length of left and right support arm CD, EF; Slide block 1 on rectilinear orbit 8, moves connection and the center is symmetrically arranged with left and right point of connection; Left point of connection, the lower extreme point that the upper extreme point of connecting rod 2 is articulated in slide block 1 is articulated in the right endpoint of rocking bar 3; The right endpoint of following rocking bar 5 is articulated in point of connection D under the left side on the vehicle frame; The middle part of last rocking bar 3 is articulated in the equal in length of distance and following rocking bar 5 of upper left point of connection C and its left end point hinge-point to the middle part of vehicle frame; The equal in length of the left support arm CD of left end point and its upper extreme point that left end point, the center that the upper extreme point of strut bar 4 is articulated in rocking bar 3 is articulated in down rocking bar 5 on the distance of middle part hinge-point and the vehicle frame, last rocking bar 3, rocking bar 5, strut bar 4 constitute parallel-crank mechanism with left support arm CD on the vehicle frame in same plane down; The lower extreme point of axletree 6 and strut bar 4 is vertical to be connected and its axis places in the parallel-crank mechanism plane of movement; Wheel 7 is rotationally connected on axletree 6; Forming left half actuating device is 2-3-4-5-6-7, and with the identical right side of a left side half actuating device half actuating device 2 '-3 '-4 '-5 '-6 '-7 ', the vehicle central plane symmetry is arranged on the vehicle frame relatively; The shared same slide block of left and right half actuating device 1, shared same vehicle frame constitute the trafficability setting device.When the distance between the base plate on slide block 1 and the vehicle frame 9 was S, the ground-surface height of base plate on the vehicle frame 9 distances was h, by outside force change between slide block 1 and the base plate 9 apart from S, through parallel-crank mechanism, can change base plate 9 apart from ground-surface height h.
For realizing the adjusting to the vehicle chassis arrangement for adjusting height, slide block 1 is connected with actuating device, and slide block also is provided with position locking mechanism (not shown in the accompanying drawing), is used for the height and position of lock slider with respect to the middle straight trajectory.Preferred actuating device is a hydraulic efficiency gear, thereby position locking mechanism is a fluid control valve.
In conjunction with shown in Fig. 2 to 6, the embodiment of the invention also provides a kind of vehicle, and the chassis 10 of vehicle is installed with two above-mentioned vehicle chassis arrangement for adjusting height, and the vehicle chassis arrangement for adjusting height is installed in relative both sides, chassis 10.Preferably, the vehicle chassis arrangement for adjusting height is positioned at the rear and front end on chassis 10.
The vehicle chassis fundamental diagram that can initiatively adjust height as shown in Figure 2; Two groups of trafficability setting devices are arranged on the same chassis 10 apart from front and back according to given axletree; Shared same vehicle central plane produces propulsive efforts through two groups of hydraulic rams and changes two slide blocks 1 and the distance between the base plate 9 on the vehicle frame in the forward and backward trafficability setting device simultaneously, keeps forward and backward slide block 1 to equate with distance between the base plate 9; Pass through parallel-crank mechanism; Make base plate 9 apart from ground-surface Level Change, realize the adjustment of vehicle chassis 10 height, fluid control valve or mechanical locking device are passed through in the adjustment back; Distance between fixing forward and backward slide block 1 and the base plate 9 is constant, can keep one of vehicle chassis 10 to confirm height; In the process of moving; Lock the relative motion of two slide blocks 1 and rectilinear orbit 8 in the forward and backward trafficability setting device; So that the vertical load in the face of wheel 7 is delivered to the pressure on the slide block 1 through parallel-crank mechanism evenly, the vehicle chassis 10 of height can be initiatively adjusted in formation.In the chassis height adjustment process; Because the strut bar 4 of parallel-crank mechanism is parallel with the left support arm CD on the vehicle frame; And left support arm CD is vertical with base plate 9 on the vehicle frame, so strut bar 4 is vertical with base plate 9 all the time, again because of wheel 7 pivots center and axletree 6 conllinear; Cause the plane of rotation of wheel 7 parallel with strut bar 4; So wheel 7 all the time with vehicle frame on base plate 9 vertical, go at vehicle chassis, in the operation process, four wheels all can remain with vehicle frame on the vertical and wheelbase of base plate remain constant.In the chassis height adjustment process; Keep two slide blocks in the forward and backward trafficability setting device to equate with distance between the base plate; Then forward and backward vehicle wheel is regulated two slide block equidistance simultaneously continuously and is moved apart from equating in the vehicle ' process, can realize the step-less adjustment of vehicle chassis height.
The fundamental diagram of increase vehicle chassis height as shown in Figure 3; Produce propulsive efforts through two groups of hydraulic rams and increase two slide blocks 1 and the distance between the base plate on the vehicle frame in the forward and backward trafficability setting device simultaneously, keep forward and backward slide block 1 to equate, through parallel-crank mechanism with distance between the base plate 9; The ground-surface height of base plate 9 distances is increased; The adjustment back is through fluid control valve or mechanical locking device, and the distance between fixing forward and backward slide block 1 and the base plate 9 is constant, obtains a higher vehicle chassis height; Improve the through performance of vehicle chassis, so that satisfy the farm work requirement of plant growth middle and later periods and long-stalked crops; In the adjustment process, when connecting rod 2 and last rocking bar 3 conllinear, reach the highest carrying capacity of vehicle chassis.
The fundamental diagram of reduction vehicle chassis height as shown in Figure 4; Produce propulsive efforts through two groups of hydraulic rams and reduce two slide blocks 1 and the distance between the base plate 9 on the vehicle frame in the forward and backward trafficability setting device simultaneously; Keep forward and backward slide block 1 to equate,, the ground-surface height of base plate 9 distances is reduced through parallel-crank mechanism with distance between the base plate 9; The adjustment back is through fluid control valve or mechanical locking device; Distance between fixing forward and backward slide block 1 and the base plate is constant, obtains a lower vehicle chassis 10 height, to adapt to the farm work requirement of plant growth initial stage and short crop.The vehicle chassis that can initiatively adjust height by shown in Figure 3 is in higher through performance mode of operation; Contrasting the vehicle chassis 10 that can initiatively adjust height shown in Figure 4 is in low through the performance mode of operation; Chassis 10 height adjustment range can adapt to the farm work requirement in the crop whole growth process greater than wheel 7 diameter of tyres.
In conjunction with Fig. 5 and shown in Figure 6, during the vehicle climbing, the vehicle chassis arrangement for adjusting height that is positioned at chassis 10 front ends reduces, and the vehicle chassis arrangement for adjusting height that is positioned at 10 rear ends, chassis raises, and chassis 10 is in horizontality; During vehicles go down, the vehicle chassis arrangement for adjusting height that is positioned at chassis 10 front ends raises, and the vehicle chassis arrangement for adjusting height that is positioned at 10 rear ends, chassis reduces, and chassis 10 is in horizontality.
Concrete can initiatively adjust vehicle chassis upward slope comformability schematic diagram highly referring to shown in Figure 5; Vehicle chassis goes to domatic 11 belows; The slide block 1 of trafficability setting device is with the distance between the base plate 9 on the vehicle frame, increase the afterwards slide block 1 of trafficability setting device and the distance between the base plate 9 on the vehicle frame simultaneously before producing propulsive effort and reduce through hydraulic ram; The adjustment back is through fluid control valve or mechanical locking device; Distance between fixing forward and backward slide block 1 and its cooresponding base plate 9 is constant; Obtain a low early and high after vehicle chassis mode of operation, can adapt in the vehicle chassis up-hill journey process base plate 9 on the vehicle frame near the operating condition of level.
The vehicle chassis descending comformability schematic diagram that can initiatively adjust height as shown in Figure 6; Vehicle chassis goes to domatic 11 tops; The slide block 1 of trafficability setting device is with the distance between the base plate on the vehicle frame 9, reduce the afterwards slide block 4 of trafficability setting device and the distance between the base plate on the vehicle frame 9 simultaneously before producing propulsive effort and increase through hydraulic ram; The adjustment back is through fluid control valve or mechanical locking device; Fixing forward and backward slide block 1 is constant with the distance between its cooresponding base plate 9, obtains high afterwards low vehicle chassis mode of operation before, can adapt in the vehicle chassis descent run process base plate on the vehicle frame near the operating condition of level.
Can find out by above embodiment; The embodiment of the invention provides a kind of vehicle chassis arrangement for adjusting height; Comprise: be used for the vehicle frame of captiveing joint with vehicle chassis 10; With the strut bar 4 that wheel of vehicle axle 6 is captiveed joint at vertical direction, be connected with parallelogram linkage between vehicle frame and the strut bar 4; Vehicle frame is with respect to the adjustable height of wheel position in the vertical direction.This device can initiatively be adjusted vehicle chassis 10 height, and setting range surpasses the wheel tyre diameter, increases vehicle chassis 10 height, changes trafficability significantly, to adapt to plant growth middle and later periods and the long-stalked crops job requirements to farmland machinery; Reduce vehicle chassis 10 height,, the stability of high vehicle speeds can be provided also to adapt to the farm work requirement of plant growth initial stage and short crop.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and replacement, these improvement and replacement also should be regarded as protection scope of the present invention.
Claims (9)
1. vehicle chassis arrangement for adjusting height; It is characterized in that; Comprise: be used for the vehicle frame of captiveing joint,, be connected with parallelogram linkage between said vehicle frame and the said strut bar (4) with the strut bar (4) that wheel of vehicle axle (6) is captiveed joint at vertical direction with vehicle chassis (10); Said vehicle frame is with respect to the adjustable height of wheel position in the vertical direction.
2. vehicle chassis arrangement for adjusting height as claimed in claim 1 is characterized in that, said vehicle frame comprises the rectilinear orbit (8) of base plate (9) and perpendicular captive joint, and said rectilinear orbit (8) is installed with can be along its slide block that slides up and down (1);
Said parallelogram linkage comprises: be vertically fixed on the support arm of said base plate (9) end, the last rocking bar (3) that is articulated and connected with the last point of connection and the following point of connection of said support arm respectively and rocking bar (5) down, the said articulated position that goes up rocking bar (3) and the last point of connection of said support arm is positioned at the said upward middle part of rocking bar (3); It is hinged with said strut bar (4) respectively that said rocking bar (5) down reaches the other end of going up rocking bar (3), and said rocking bar (5) down and last rocking bar (3) are for laterally arranging;
Said opposite end of going up rocking bar (3) and said strut bar (4) coupling end is hinged with connecting rod (2), and said connecting rod (2) is hinged to the fixed connection point with said slide block (1) homonymy.
3. vehicle chassis arrangement for adjusting height as claimed in claim 2 is characterized in that,, said vehicle chassis arrangement for adjusting height is that line of centers is symmetrical distribution with said rectilinear orbit.
4. vehicle chassis arrangement for adjusting height as claimed in claim 2 is characterized in that, said slide block (1) is connected with actuating device, and said slide block also is provided with position locking mechanism, is used to lock the height and position of said slide block with respect to said middle straight trajectory.
5. vehicle chassis arrangement for adjusting height as claimed in claim 4 is characterized in that, said actuating device is a hydraulic efficiency gear.
6. vehicle chassis arrangement for adjusting height as claimed in claim 5 is characterized in that, said position locking mechanism is a fluid control valve.
7. vehicle; It is characterized in that; Said vehicle comprises: the chassis of said vehicle (10) are installed with two like each said vehicle chassis arrangement for adjusting height in the claim 1 to 6, and said vehicle chassis arrangement for adjusting height is installed in relative both sides, said chassis (10).
8. vehicle as claimed in claim 7 is characterized in that said vehicle chassis arrangement for adjusting height is positioned at the rear and front end of said chassis (10).
9. vehicle as claimed in claim 8 is characterized in that,
When said vehicle was climbed, the said vehicle chassis arrangement for adjusting height that is positioned at said chassis (10) front end reduced, and the said vehicle chassis arrangement for adjusting height that is positioned at rear end, said chassis (10) raises, and said chassis (10) are in horizontality;
During said vehicles go down, the said vehicle chassis arrangement for adjusting height that is positioned at said chassis (10) front end raises, and the said vehicle chassis arrangement for adjusting height that is positioned at rear end, said chassis (10) reduces, and said chassis (10) are in horizontality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110458010 CN102556163B (en) | 2011-12-30 | 2011-12-30 | Height adjustment device for vehicle chassis and vehicle adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110458010 CN102556163B (en) | 2011-12-30 | 2011-12-30 | Height adjustment device for vehicle chassis and vehicle adopting same |
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| Publication Number | Publication Date |
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| CN102556163A true CN102556163A (en) | 2012-07-11 |
| CN102556163B CN102556163B (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110458010 Expired - Fee Related CN102556163B (en) | 2011-12-30 | 2011-12-30 | Height adjustment device for vehicle chassis and vehicle adopting same |
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| CN102874314A (en) * | 2012-09-28 | 2013-01-16 | 管中林 | Four-wheeled foldable off-road vehicle frame capable of being adjusted greatly |
| CN102975786A (en) * | 2012-12-13 | 2013-03-20 | 中国农业大学 | Automatic vertical level-adjusting mechanism for vehicle chassis |
| CN103109607A (en) * | 2013-02-04 | 2013-05-22 | 柳州博实唯汽车科技有限公司 | Traction power chassis suitable for tall-stem crop farm machinery operation |
| CN103109605A (en) * | 2013-02-04 | 2013-05-22 | 柳州博实唯汽车科技有限公司 | Wing changing device of traction power chassis suitable for tall-stem crop agricultural machinery operation |
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| CN104058023A (en) * | 2014-07-04 | 2014-09-24 | 中国农业大学 | Vehicle chassis horizontal adjustment device and vehicle with same |
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| CN102874314A (en) * | 2012-09-28 | 2013-01-16 | 管中林 | Four-wheeled foldable off-road vehicle frame capable of being adjusted greatly |
| CN102975786A (en) * | 2012-12-13 | 2013-03-20 | 中国农业大学 | Automatic vertical level-adjusting mechanism for vehicle chassis |
| CN102975786B (en) * | 2012-12-13 | 2014-12-10 | 中国农业大学 | Automatic vertical level-adjusting mechanism for vehicle chassis |
| CN103109607B (en) * | 2013-02-04 | 2015-09-23 | 柳州博实唯汽车科技有限公司 | Be applicable to the traction power chassis of long-stalked crop agricultural machinery working |
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| CN103109605A (en) * | 2013-02-04 | 2013-05-22 | 柳州博实唯汽车科技有限公司 | Wing changing device of traction power chassis suitable for tall-stem crop agricultural machinery operation |
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