CN106500892A - Straw pulling force tester - Google Patents
Straw pulling force tester Download PDFInfo
- Publication number
- CN106500892A CN106500892A CN201610851583.8A CN201610851583A CN106500892A CN 106500892 A CN106500892 A CN 106500892A CN 201610851583 A CN201610851583 A CN 201610851583A CN 106500892 A CN106500892 A CN 106500892A
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- CN
- China
- Prior art keywords
- workbench
- spheroid
- dead man
- sleeve
- pulling force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cultivation Of Plants (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to the technical field of measurement power, especially a kind of straw pulling force tester.Including vertical maintaining body, clamp system, hoisting mechanism and support；The vertical maintaining body includes workbench, spheroid sleeve and hold down gag, spheroid sleeve is arranged on the center position of workbench, and be located in workbench, it is raised that the bottom of spheroid sleeve is fixed with rectangle, hoisting mechanism is provided with the inner chamber of spheroid sleeve, the outer surface of spheroid sleeve is spherical in shape, the outer surface of spheroid sleeve is engaged with workbench, spheroid sleeve is rotated in workbench, make hoisting mechanism and clamp system keep vertical direction under gravity, one end of hold down gag spherical in shape and with spheroid barrel contacts；The hoisting mechanism has included pulling out handwheel, screw shell, has played dead man and strain tension sensor, and the center for playing dead man is provided with cavity, and the bottom for playing dead man is fixedly connected with clamp system.Its simple structure, easy to operate, can accurately measure straw pulling force.
Description
Technical field
The present invention relates to the technical field of measurement power, especially a kind of straw pulling force tester.
Background technology
With the development of rural economy in recent years, most area stalk farmland is carried out no-tillage, minimal till, to the greatest extent may be used
Can minimizing farming, and with seeding corn and other crops improving straw mulching earth's surface, bite with water so as to reducing wind and biting, increase soil fertility and cold-resistant
Ability.For this crop processing mode, the seeder and tillage machinery with cutting corn rootstalk ability is generated, and root stubble is pulled out
Remove apparatus.
When the physico mechanical characteristic of straw pulling attachment or harvesting apparatus and straw is studied, be required for straw with
The adhesion of soil and required pulling force are measured, but the mechanical property of cane is due to soil environment, crop growthing state
Different there is very big difference, so needing a measuring apparatus to provide accurate pulling force parameter.
The prosperity of stalk crop root is typically combined with soil more closely, and pulling force is very big, existing test instrunment one
As be all according to test make, affected by the means of testing of pulling force during actual test larger, therefore can only be rough
Ground is determined and extracts power of the crop with needed for stubble, and acts that to pull out tester complicated, carries inconvenient, and field stability of strutting system is poor, puts
Pulling force after rising on rear side of stress is not plummet power, it is impossible to accomplishes that vertical rising is pulled out according to specific environment, easily deviates actual numerical value
And it cannot be guaranteed that at the uniform velocity loading, or even generation moment of torsion can be rotated.It is domestic at present that also easily straw is not pulled out in accurate measurement
The survey tool of stress intensity so that this scientific research project lacks data parameters, related equipment cannot meet the market demand, development
Also stagnate always.
Content of the invention
It is an object of the invention to solve vertically to rise present in prior art pull out, pulling force is determined and inaccurate is asked
Topic, it is proposed that a kind of straw pulling force tester, its simple structure are easy to operate, can accurately measure straw pulling force.
The technical scheme is that：A kind of straw pulling force tester, wherein, including vertical maintaining body, clamping machine
Structure, hoisting mechanism and support；
The vertical maintaining body includes that workbench, spheroid sleeve and hold down gag, spheroid sleeve are arranged on workbench
Center position, and be located in workbench, the bottom of spheroid sleeve is fixed with rectangle projection, is provided with the inner chamber of spheroid sleeve
Hoisting mechanism, the outer surface of spheroid sleeve are spherical in shape, and the outer surface of spheroid sleeve is engaged with workbench, and spheroid sleeve is in work
Rotate in platform, make hoisting mechanism and clamp system keep vertical direction under gravity, one end of hold down gag spherical in shape and
With spheroid barrel contacts；
The hoisting mechanism has included pulling out handwheel, screw shell, has played dead man and strain tension sensor, rises in dead man
The heart is provided with cavity, and the bottom for playing dead man is fixedly connected with clamp system, and strain tension sensor has been arranged on dead man and clamping
The fixed connection place of mechanism, screw shell are arranged in spheroid sleeve, be fixed with and pull out handwheel at the top of screw shell, thread bush
The female thread of cylinder is cooperated with the external screw thread for playing dead man, and the outer surface for playing dead man is provided with long keyway, the length of spheroid sleeve bottom
Square protruding is engaged with the long keyway for playing dead man；
The clamp system includes that clamping handwheel, flat thread disk connecting rod, pawl refers to and plane threaded disk, flat thread
The upper end of disk connecting rod has been arranged in the cavity of dead man, and the top of flat thread disk connecting rod is fixed with clamping handwheel, plane
The bottom of threaded disk connecting rod is fixedly connected with flat thread disk, and the bottom surface disc surfaces of flat thread disk are provided with plane spiral shell
Stricture of vagina, several pawls refer to decile on flat thread.
In the present invention, also include that three supports, three supports circumferentially wait point setting, one end of support and a job along workbench
Table-hinges connects.
The workbench includes part and part under workbench on workbench, is partly fixed on workbench bottom on workbench
The top that divides, is provided with hold down gag between part and workbench bottom point on workbench, is fixed with spheroid at the top of spheroid sleeve
Socket cover.
The hold down gag includes that briquetting, threaded rod and handwheel, one end of threaded rod are provided with briquetting, threaded rod
The other end is provided with handwheel, and briquetting is arranged in workbench, and briquetting is sphere, the sphere and spheroid set towards the side of spheroid sleeve
The outer surface of cylinder is engaged, and the outer surface of threaded rod is provided with screw thread, corresponding is provided with female thread, threaded rod in workbench
External screw thread be engaged with the female thread in workbench, handwheel is arranged on the outside of workbench.By hold down gag spheroid set
Cylinder is compressed on the table, makes to relatively rotate between spheroid sleeve and workbench, can be thus to complete vertically
Next step after adjustment is prepared.
Described dead man is played dead man bottom and is rigidly connected by bolt with clamp system in inverted T shape, strain-type pull sensing
The two ends of device have been arranged on the connecting bolt of dead man and clamp system.Just can have been proposed by measuring the change of power on bolt
Pull out force.
The workbench is provided with display screen, and pressure transducer is connected with dynamometry instrument.Opening dynamometry instrument switch is carried out
Measurement, and the power numerical value that measures accurately is shown on a display screen.
Bearing is provided between the screw shell and spheroid sleeve, and described bearing can adopt cone bearing.
Pawl is provided with the outside of the flat thread disk refers to that shell, pawl refer to that shell is fixed with the bottom for playing dead man by connecting rod
Connection.When the link rotatable with flat thread disk, flat thread just makes four pawls refer to along housing slide while close
Or away from center, when four pawls refer to while can just clamp straw during near center.By rotate clamp handwheel change four paws it
Between gap, be to be engaged by flat thread as pawl refers to disk, after disk rotational certain angle, four pawls refer to same phase
Mutually near a certain distance, the structure can be realized by controlling rotational angle and then controlling clamping force and the steady mesh such as clamp
's.
Beneficial effects of the present invention：
(1) by spheroid sleeve, hoisting mechanism and clamp system is made to remain vertical direction under gravity, real
Now vertically drawing, the pulling force for obtaining side are more accurate；
(2) spheroid sleeve is extruded by hold down gag, spheroid sleeve is pressed together with workbench, spheroid sleeve is made not
Relatively rotate, prepare for completing clamping and lifting after vertically adjustment；
(3) Zhao Zhi discs clamps mechanism is adopted, realizes that each pawl refers to using flat thread equidistant toward and away from can be with
Smoothly clamp straw, and the clamping degree that is suitable for can be selected according to the practical situation of straw, the problems such as be not likely to produce loosening；
(4) rotate clamping handwheel and can just clamp straw, rotate drawing handwheel and can be carried out drawing operation, clamp and carry
The action for rising individually can be carried out, and will not influence each other, simple and convenient；
(5) by playing being threadedly coupled between dead man and screw shell, the lifting of dead man has been controlled well, while passing through
The rectangle of spheroid sleeve bottom is raised to be coordinated with long keyway that is playing dead man, has made phase between dead man and screw shell
To rotating；
(6) reduce that domestic original straw is ergographic to be affected by practical problems such as landform, and can be according to support angle
Change the angle of leg, improve instrument grabs ground ability and adaptive faculty；
(7) overall structure is simple, and operation is simple, is easy to keep in repair.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of vertical maintaining body；
Fig. 3 is the structural representation of hold down gag；
Fig. 4 is the structural representation of hoisting mechanism；
Fig. 5 is the raised structural representation coordinated with long keyway of rectangle；
Fig. 6 is the structural representation of flat thread disk.
In figure：1 clamps handwheel；2 are pulled out handwheel；3 workbench；4 hold down gags；401 briquettings；402 threaded rod；403 handss
Wheel；5 dead mans；6 supports；7 pawls refer to；8 pawls refer to shell；9 display screens；10 vertical maintaining bodies；11 screw shells；12 spheroid sets
Cylinder；Part under 13 workbench；14 rectangles are raised；15 bearings；Part on 17 workbench；18 spheroid socket covers；20 flat threads
Disk connecting rod；23 flat thread disks；24 connecting rods；25 flat threads.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
The straw pulling force tester includes vertical maintaining body 10, clamp system, hoisting mechanism and support 6.
As shown in Fig. 2 vertically maintaining body 10 includes workbench 3, spheroid sleeve 12, spheroid socket cover 18 and hold down gag
4, wherein workbench 3 includes that under part 17 and workbench part 13 on workbench, and on workbench, part 17 is fixed under workbench
The top of part 13, is provided with hold down gag 4 between part 13 under part 17 and workbench on workbench.Spheroid sleeve 12 is arranged on
The center position of workbench 3, and be located in workbench 3.The top of spheroid sleeve 12 is fixed with spheroid socket cover 18, spheroid set
The bottom of cylinder 12 is provided with rectangle projection 14.Hoisting mechanism, the outer surface of spheroid sleeve 12 is provided with the inner chamber of spheroid sleeve 12
Spherical in shape, the outer surface of spheroid sleeve 12 is engaged with workbench 3.As the contact surface of spheroid sleeve and workbench is sphere,
Therefore spheroid sleeve can be rotated in workbench, no matter now how workbench is put, under gravity, spheroid sleeve 12
Axis will be in vertical state all the time.As shown in figure 3, hold down gag includes briquetting 401, threaded rod 402 and handwheel 403,
One end of threaded rod 402 is provided with briquetting 401, and the other end of threaded rod 402 is provided with handwheel 403, and briquetting 401 is arranged on work
In platform 3, briquetting 401 is sphere towards the side of spheroid sleeve 12, and the sphere is engaged with the outer surface of spheroid sleeve 12, screw thread
The outer surface of connecting rod 402 is provided with screw thread, corresponding is provided with female thread, the external screw thread of threaded rod 402 and work in workbench
Female thread in platform is engaged, and handwheel 403 is arranged on the outside of workbench.Handwheel 403 is rotated, drives threaded rod 402 to rotate,
It is achieved thereby that threaded rod 402 is movable, when briquetting 401 is moved to be contacted with spheroid sleeve 12, spheroid set is realized
The compression of cylinder 12, thus can be pressed on spheroid sleeve 12 on workbench 3, make between spheroid sleeve 12 and workbench 3 not
Can relatively rotate, so as to prepare for completing the next step after vertically adjustment.By vertical maintaining body, lift structure is made
Vertical direction is remained with clamp system, vertical drawing is realized, so that the pulling force that side obtains is more accurate.
As depicted in figs. 1 and 2, the hoisting mechanism has included pulling out handwheel 2, screw shell 11, bearing 15,5 and of dead man
Strain tension sensor.Dead man 5 is played in inverted T shape, the center for playing dead man 5 is provided with cavity, play bottom and the clamp system of dead man 5
It is fixedly connected, in the present embodiment, plays dead man and be rigidly connected by bolt with clamp system.Screw shell 11 is arranged on spheroid sleeve
In 12, bearing 15 between screw shell 11 and spheroid sleeve 12, is provided with, the bearing in the present embodiment adopts cone bearing.Thread bush
The top of cylinder 11 has been fixed with pulls out handwheel 2, and having rotated screw shell 11 when pulling out handwheel 2 can be with rotatable around its axis.Screw shell
11 female thread is cooperated with the external screw thread for playing dead man 5, while the outer surface for playing dead man 5 is provided with long keyway, spheroid sleeve bottom
The rectangle in portion raised 14 is engaged with the long keyway for playing dead man, as shown in Figure 5.When rotated pull out handwheel 2 when, screw shell 11
Rotate, coordinated by the screw thread risen between dead man 5 and screw shell 11, screw shell rotation one is enclosed, play dead man and just rise a spiral shell
Away from, can be very good control lifted；Meanwhile, matched somebody with somebody by the rectangle of 12 bottom of spheroid sleeve raised 14 and the long keyway for playing dead man
Close, when screw shell 11 is rotated, due to the restriction that rectangle is raised, playing a dead man 5 can only rise or fall, rise dead man rising or
Do not relatively rotate between workbench during decline and after compression, the straw after therefore clamping can only move up and down without revolving
Turn.The two ends of strain tension sensor have been arranged on the connecting bolt of dead man and clamp system, by measuring power on bolt
Change just can draw pulling force.Workbench 3 is provided with display screen 9, and pressure transducer is connected with dynamometry instrument, opens dynamometry one
Play switch to measure, and the power numerical value that measures accurately is shown on a display screen.
As shown in Fig. 1, Fig. 4 and Fig. 6, the clamp system includes clamping handwheel 1, flat thread disk connecting rod 20, connecting rod
24th, pawl refers to that 7, pawl refers to that shell 8 and plane threaded disk 23, the upper end of flat thread disk connecting rod 20 have been arranged on the sky of dead man 5
Intracavity, the top of flat thread disk connecting rod 20 are fixed with clamping handwheel 1, the bottom of flat thread disk connecting rod 20 and plane spiral shell
Stricture of vagina disk 23 is fixedly connected, and the bottom surface circular surface of flat thread disk is provided with flat thread 25, and four pawls refer to that 7 grades point are installed
On flat thread 25.The outside of flat thread disk 23 is provided with pawl and refers to that shell 8, pawl refer to shell 8 by connecting rod 24 and a dead man 5
Bottom be fixedly connected.When flat thread disk connecting rod 20 is rotated, it is suitable that the screw thread on flat thread disk 23 refers to four pawls
Housing slide while closer or far from center, when four pawls refer to while straw can be just clamped during near center.By rotating
The gap that handwheel changes between four paws is clamped, is engaged by flat thread between disk as pawl refers to, disk rotational is certain
After angle, four pawls refer to while a certain distance close to each other, and the structure can be realized by controlling rotational angle and then controlling
The purpose such as clamping force and steady clamping.
The present invention includes three supports 6, and three supports 6 are circumferentially waited along workbench and point arranged, one end of support 6 and a workbench
It is hinged, in the present embodiment, the support adopts telescopic sleeve, including adjustable feet and telescope support, telescope support and work
Connect as table-hinges, adjustable feet is connected with telescope support by pin.In the rough landform in field, can be in the light of actual conditions
The angle of adjustment telescope support and height, while the angle of leg according to the difference of support angle, can be adjusted, improve instrument
Grab ground ability and adaptive faculty, and then consolidate measuring instrument, it is ensured that the accuracy of measurement.
The course of work of the tester is as described below：The tester is put into behind field, first the angle of adjusting bracket and
Highly, field is placed on by firm for measuring instrument；Then, by the rotation of spheroid sleeve in vertical maintaining body, and by compressing
Device fixes the position of spheroid sleeve, makes hoisting mechanism and clamp system remain vertical direction, realizes that vertical direction draws
Pull out, make the pulling capacity for measuring more accurate；Next, clamping straw by clamp system, then pass through hoisting mechanism by straw
Stalk is pulled up, and during pulling up, the value of thrust that sensing is obtained is passed to dynamometer by strain tension sensor, the pulling force for measuring
Value intuitively can be embodied on display screen 9, be easy to people to read.
Claims (9)
1. a kind of straw pulling force tester, it is characterised in that：Including vertical maintaining body (10), clamp system, hoisting mechanism
With support (6)；
Described vertical maintaining body (10) include workbench (3), spheroid sleeve (12) and hold down gag (4), spheroid sleeve (12)
The center position of workbench (3) is arranged on, and is located in workbench (3), the bottom of spheroid sleeve (12) is fixed with rectangle
Raised (14), are provided with hoisting mechanism in the inner chamber of spheroid sleeve (12), the outer surface of spheroid sleeve (12) is spherical in shape, spheroid sleeve
(12) outer surface is engaged with workbench (3), and spheroid sleeve is rotated in workbench, makes hoisting mechanism and clamp system in weight
Power effect is lower to keep vertical direction, one end of hold down gag (4) spherical in shape and with spheroid barrel contacts；
The hoisting mechanism has included pulling out handwheel (2), screw shell (11), has played dead man (5) and strain tension sensor, rises and pulls out
The center of bar (5) is provided with cavity, and the bottom for playing dead man (5) is fixedly connected with clamp system, and strain tension sensor is arranged on
The fixed connection place of dead man (5) and clamp system is played, screw shell (11) is arranged in spheroid sleeve (12), screw shell (11)
Top be fixed with and pulled out handwheel (2), the female thread of screw shell (11) is cooperated with the external screw thread for playing dead man (5), is risen and is pulled out
The outer surface of bar (5) is provided with long keyway, and rectangle projection (14) of spheroid sleeve bottom is engaged with the long keyway for playing dead man；
The clamp system includes that clamping handwheel (1), flat thread disk connecting rod (20), pawl refers to (7) and plane threaded disk
(23), the upper end of flat thread disk connecting rod (20) has been arranged in the cavity of dead man (5), flat thread disk connecting rod (20)
Top is fixed with clamping handwheel (1), and the bottom of flat thread disk connecting rod (20) is fixedly connected with flat thread disk (23), puts down
The bottom disc surface of face threaded disk is provided with flat thread (25), and several pawls refer to (7) decile on flat thread.
2. straw pulling force tester according to claim 1, it is characterised in that：Also include three supports (6), three are propped up
Frame (6) circumferentially waits a point setting along workbench, and one end of support (6) is hinged with workbench.
3. straw pulling force tester according to claim 1, it is characterised in that：Described workbench (3) include workbench
Part (13) under upper part (17) and workbench, on workbench, part (17) is fixed on the top of part (13) under workbench, work
Make partly to be provided with hold down gag (4) between (13) under part (17) and workbench on platform, spheroid sleeve is fixed with the top of (12)
Spheroid socket cover (18).
4. the straw pulling force tester according to claim 1 or 3, it is characterised in that：The hold down gag includes briquetting
(401), threaded rod (402) and handwheel (403), one end of threaded rod (402) are provided with briquetting (401), threaded rod (402)
The other end be provided with handwheel (403), briquetting (401) is arranged in workbench (3), and briquetting (401) is towards spheroid sleeve (12)
Side is sphere, and the sphere is engaged with the outer surface of spheroid sleeve (12), and the outer surface of threaded rod (402) is provided with screw thread,
Corresponding be provided with female thread in workbench, the external screw thread of threaded rod (402) is engaged with the female thread in workbench, handwheel
(403) outside of workbench is arranged on.
5. straw pulling force tester according to claim 1, it is characterised in that：Described dead man (5) is risen in inverted T shape
Dead man bottom is rigidly connected by bolt with clamp system, and the two ends of strain tension sensor have been arranged on dead man and clamping machine
On the connecting bolt of structure.
6. straw pulling force tester according to claim 1, it is characterised in that：Workbench (3) are provided with display
Screen (9), pressure transducer are connected with dynamometry instrument.
7. straw pulling force tester according to claim 1, it is characterised in that：Screw shell (11) and spheroid set
Bearing (15) is provided between cylinder (12).
8. straw pulling force tester according to claim 7, it is characterised in that：Described bearing is cone bearing.
9. straw pulling force tester according to claim 1, it is characterised in that：Set on the outside of the flat thread disk
There is pawl to refer to that shell (8), pawl refer to that shell (8) is fixedly connected with the bottom for playing dead man (5) by connecting rod (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851583.8A CN106500892B (en) | 2016-09-26 | 2016-09-26 | Straw pulling force tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610851583.8A CN106500892B (en) | 2016-09-26 | 2016-09-26 | Straw pulling force tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106500892A true CN106500892A (en) | 2017-03-15 |
| CN106500892B CN106500892B (en) | 2022-10-21 |
Family
ID=58290667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610851583.8A Active CN106500892B (en) | 2016-09-26 | 2016-09-26 | Straw pulling force tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106500892B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036748A (en) * | 2017-06-09 | 2017-08-11 | 山东农业大学 | A kind of corn stubble pulls up dynamometer |
| CN110864835A (en) * | 2019-09-29 | 2020-03-06 | 新疆农业大学 | Movable cotton stalk pulling mechanical parameter performance measuring device |
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| RU2142616C1 (en) * | 1998-05-21 | 1999-12-10 | Государственный космический научно-производственный центр им.М.В.Хруничева | Gear measuring and testing tightness force of threaded connections |
| CN101718600A (en) * | 2009-11-23 | 2010-06-02 | 中国农业大学 | Method and special detector for detecting vertical uprooting resistance value of plants |
| US20100242625A1 (en) * | 2009-03-31 | 2010-09-30 | Memc Electronic Materials, Inc. | Systems for weighing a pulled object having a changing weight |
| CN103592059A (en) * | 2013-11-12 | 2014-02-19 | 三峡大学 | Drawing force and displacement measuring device during plant in-situ drawing |
| CN204718897U (en) * | 2015-06-24 | 2015-10-21 | 长沙理工大学 | One Plants pulling capacity combined measuring instrument |
-
2016
- 2016-09-26 CN CN201610851583.8A patent/CN106500892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2142616C1 (en) * | 1998-05-21 | 1999-12-10 | Государственный космический научно-производственный центр им.М.В.Хруничева | Gear measuring and testing tightness force of threaded connections |
| US20100242625A1 (en) * | 2009-03-31 | 2010-09-30 | Memc Electronic Materials, Inc. | Systems for weighing a pulled object having a changing weight |
| CN101718600A (en) * | 2009-11-23 | 2010-06-02 | 中国农业大学 | Method and special detector for detecting vertical uprooting resistance value of plants |
| CN103592059A (en) * | 2013-11-12 | 2014-02-19 | 三峡大学 | Drawing force and displacement measuring device during plant in-situ drawing |
| CN204718897U (en) * | 2015-06-24 | 2015-10-21 | 长沙理工大学 | One Plants pulling capacity combined measuring instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036748A (en) * | 2017-06-09 | 2017-08-11 | 山东农业大学 | A kind of corn stubble pulls up dynamometer |
| CN110864835A (en) * | 2019-09-29 | 2020-03-06 | 新疆农业大学 | Movable cotton stalk pulling mechanical parameter performance measuring device |
| CN110864835B (en) * | 2019-09-29 | 2020-12-25 | 新疆农业大学 | Movable cotton stalk pulling mechanical parameter performance measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106500892B (en) | 2022-10-21 |
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