CN107036748B - Corn stubble pulling-up dynamometer - Google Patents
Corn stubble pulling-up dynamometer Download PDFInfo
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- CN107036748B CN107036748B CN201710434075.4A CN201710434075A CN107036748B CN 107036748 B CN107036748 B CN 107036748B CN 201710434075 A CN201710434075 A CN 201710434075A CN 107036748 B CN107036748 B CN 107036748B
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- force measuring
- stubble
- end cover
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- clamp
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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
- G01L5/0028—Force sensors associated with force applying means
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- Analytical Chemistry (AREA)
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- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a corn stubble pulling dynamometer; comprises a stubble lifting device, a force measuring bracket, a force measuring device and a clamp; the corn stubble lifting device is arranged on the force measuring support, the force measuring device is arranged below the stubble lifting device, and the clamp is connected with the force measuring device through a steel wire rope. The corn stubble pulling-up dynamometer has a simple and compact structure, wherein the stubble lifting device enables the screw rod to generate upward lifting motion through the rotation of the hand wheel, and the rotary motion is converted into linear motion through the combined action of the upper end cover, the sleeve and the lower end cover; connect anchor clamps and digital display formula push-and-pull dynamometer through wire rope, couple etc. be provided with a plurality of trapezoidal decorative patterns in anchor clamps inboard, two pipe cooperations are used and are step up the stem stalk, and trapezoidal decorative pattern has increased the contact force of anchor clamps with the stem stalk and can effectively avoid the anchor clamps slippage, makes dynamometry working process reliable and stable.
Description
Technical Field
The invention relates to a dynamometer in the field of agricultural production, in particular to a corn stubble pulling dynamometer.
Background
The measurement of the corn stubble pulling-up force has important significance for researching the corn stubble harvesting characteristic and the lodging-resistant characteristic of corn plants. However, the corn root system and the soil are mutually wrapped to form a soil-root system aggregate, so that the plant has higher soil holding capacity. And the field space of the corn is narrow, so that the common test instrument is difficult to use in the field. In addition, the outer wall of the corn stalk is smooth, and the common clamp needs reliable clamping of the stalk while ensuring that the stalk structure is not damaged so as to ensure that the measuring result is accurate, thereby avoiding the clamp from slipping. At present, the corn stubble pulling-up dynamometer is less in application, the structure of the dynamometer is complex, the existing clamp mainly adopts measures such as adding a rubber sheet with a grain on the inner side of the clamp, but the clamping force of the stubble is too large, the clamp cannot effectively clamp the stem, the stem slipping phenomenon is caused, the clamping performance is unsatisfactory, and the normal field force measurement operation of the dynamometer is difficult to realize.
The invention provides a corn stubble pulling-up force tester, which is operated by a hand wheel to drive a lead screw and a dynamometer to lift up the stubble, and is provided with a circular motion conversion linear motion device to convert the circular motion of the hand wheel into the linear motion during force measurement so as to be beneficial to a stubble pulling-up mechanism to smoothly pull up the stubble from the field. In addition, in order to solve the problem of stem slippage in the clamping process of the clamp, the stem clamp with the trapezoidal patterns is designed, so that the friction force between the clamp and the stems is increased, the stems can be effectively clamped, the stem slippage in the force measuring process is avoided, and the force measuring operation can be smoothly completed.
Disclosure of Invention
Aiming at the problems, the invention provides a corn stubble pulling-up dynamometer; the purpose provides a dynamometer is pulled up to maize root stubble simple structure, reliable operation, utilizes maize root stubble hoisting device to convert circular motion into linear motion, utilizes the stalk anchor clamps that have trapezoidal thread, forms the effective centre gripping to the stalk, and simple structure is compact to reliably accomplish maize stalk root stubble dynamometry operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a corn stubble pulling-up dynamometer comprises a dynamometric bracket, a stubble lifting device, a dynamometric device and a clamp; the stubble lifting device is arranged on the force measuring support, the force measuring device is arranged below the stubble lifting device, and the clamp and the force measuring device are connected through a steel wire rope.
The force measuring bracket comprises a sleeve and a boss; the sleeve can be movably arranged below the boss and can be folded to support the boss; the center of the boss is provided with a threaded hole for connecting a lead screw; the force measuring bracket is used for supporting the screw rod;
the stubble lifting device comprises a hand wheel, a screw rod, an upper end cover, a sleeve, a lower end cover and a suspension rod; the hand wheel is movably arranged above the screw rod, and the screw rod is vertically and movably arranged on a boss of the force measuring bracket; an upper end cover, a sleeve and a lower end cover are sequentially arranged between the screw rod and the force measuring device from top to bottom, and the upper end cover and the lower end cover are arranged at two ends of the sleeve; the sleeve is used for converting the rotary motion of the screw rod into linear motion to prevent the force measuring device from rotating; the lower end of the screw rod is movably connected with the upper end cover and can extend into the sleeve, the upper end of the suspension rod is movably fixed on the lower end cover, and the lower end of the suspension rod is connected with the digital display tension meter;
the force measuring device is a digital display type push-pull force meter; the digital display type push-pull force meter is used for reading a stubble lifting force value in real time in the force measuring process, and a hook is connected below the digital display type push-pull force meter;
the clamp consists of two semicircular round pipes which can be movably connected into a cylinder; a hanging ring is arranged in the middle of the outer side of each circular tube along the radial direction of the circular tube and is used for being connected with a hook; trapezoidal patterns are uniformly distributed on the inner wall of the round tube so as to increase the friction force between the clamp and the surface of the stem.
Preferably, the number of the sleeves is three.
Preferably, the boss is disc-shaped.
The invention has the following advantages:
1. the stubble lifting device is arranged, the hand wheel rotates to enable the screw rod to generate upward lifting motion, the upper end cover, the sleeve and the lower end cover are arranged between the screw rod and the force measuring device, the rotary motion is converted into linear motion through the combined action of the upper end cover, the sleeve and the lower end cover, and the structure is simple and compact.
2. The clamp is connected with the digital display type push-pull force meter through the steel wire rope, the hook and the like, the inner side of the clamp is provided with a plurality of trapezoidal patterns, the two circular pipes are matched for use to tighten the stem, and the two circular pipes are fastened through the bolts at the two sides, so that the trapezoidal patterns increase the contact force between the clamp and the stem, and the clamp can be effectively prevented from slipping.
Drawings
FIG. 1 is a schematic isometric view of the overall structure of the present invention
FIG. 2 is a schematic view of a corn stubble lifting device
FIG. 3 is a schematic view of a force measuring device
FIG. 4 is a schematic view of a force-measuring mount
FIG. 5 is a schematic view of the structure of the clamp of the present invention
In the figure, 1 nut I;2, a hand wheel; 3, a pin shaft; 4, a lead screw; 5 digital display type push-pull force meter; 6, hooking; 7, a steel wire rope; 8, a boss; 9 casing pipe; 10 hanging rods; 11, a clamp; 12, a bolt I;13, a bolt II;14, bolt III;15 lower end cap; 16 a sleeve; 17, an upper end cover; 18 nut II
Detailed Description
A corn stubble plucking dynamometer comprises a dynamometric bracket, a stubble lifting device, a dynamometric device and a clamp 11; the stubble lifting device is arranged on the force measuring support, the force measuring device is arranged below the stubble lifting device, and the clamp and the force measuring device are connected through a steel wire rope.
The force measuring bracket comprises a sleeve 9 and a boss 8; the three sleeves 9 can be movably arranged below the bosses 8, and the sleeves 9 can be folded to support the bosses 8; the boss 8 is disc-shaped; the center of the boss 8 is provided with a threaded hole for connecting the screw rod 4; the force measuring bracket is used for supporting the screw rod 4;
the stubble lifting device comprises a hand wheel 2, a screw rod 4, an upper end cover 17, a sleeve 16, a lower end cover 15 and a suspension rod 10; the hand wheel 2 is movably arranged above the screw rod 4, and the screw rod 4 is vertically and movably arranged on a boss 8 of the force measuring bracket; an upper end cover 17, a sleeve 16 and a lower end cover 15 are sequentially arranged between the screw rod 4 and the force measuring device from top to bottom, and the upper end cover 17 and the lower end cover 15 are arranged at two ends of the sleeve 16; the sleeve 16 is used for converting the rotary motion of the screw rod 4 into linear motion to prevent the force measuring device from rotating; the lower end of the screw rod 4 is movably connected with an upper end cover 17 and can extend into the sleeve 16, the upper end of the suspension rod 10 is movably fixed on the lower end cover 15, and the lower end is connected with a digital display tension meter;
the force measuring device is a digital display type push-pull force meter 5; the digital display type push-pull force meter 5 is used for reading a stubble lifting force value in real time in the force measuring process, and a hook 6 is connected below the digital display type push-pull force meter 5;
the clamp 11 consists of two semicircular round pipes which can be movably connected into a cylinder; a hanging ring is arranged in the middle position of the outer side of each circular pipe along the radial direction of the circular pipe and is used for being connected with the hook 6; trapezoidal patterns are uniformly distributed on the inner wall of the round tube so as to increase the friction force between the clamp and the surface of the stem; the corn stalks can be clamped without falling off after the two semicircular round tubes form a cylinder.
The invention is described in detail below with reference to the figures and examples.
Fig. 1 is an isometric view of the whole structure of the corn stubble plucking force measuring instrument. A corn stubble lifting device of the corn stubble lifting dynamometer is arranged on the force measuring bracket; the digital display type push-pull gauge 5 is arranged below the corn lifting device, and the clamp 11 is arranged below the digital display type push-pull gauge 5 through the hook 6 and the steel wire rope 7.
As shown in figure 2, the corn stubble lifting device is characterized in that a hand wheel 2 is fixed above a screw rod 4 through a nut I1, the hand wheel 2 is in key connection with the screw rod 4, the screw rod 4 penetrates through a boss 8 on a force measuring support and is in threaded connection, the bottom of the screw rod 4 is connected with an upper end cover 17 through threads, the upper end cover 17 is connected with a sleeve 16 through a bolt II 13, the sleeve 16 is connected with a lower end cover 15 through a bolt III 14, and a suspension rod 10 penetrates through a through hole of the lower end cover 15 and is connected with a digital display type push-pull dynamometer 5.
As shown in the force measuring device of fig. 3, the upper end of a digital display type push-pull force meter 5 (HF-5000 type digital display type push-pull force meter) is connected with a corn stubble lifting device suspension rod 10, the lower part of the digital display type push-pull force meter 5 is connected with a hook 6, and the hook 6 is connected with a clamp 11 through a steel wire rope 7.
As shown in figure 4, the force measuring bracket is characterized in that a plurality of sleeves 9 are connected with a boss 8 through a pin shaft 3, a threaded hole is formed in the boss 8, and a screw rod 4 penetrates through the threaded hole of the boss 8 to be connected with the force measuring bracket.
As shown in fig. 5, the clamp 11 is a semicircular circular tube, the inner wall of the clamp is designed with a plurality of trapezoidal patterns, a plurality of thin plates are arranged on two sides of the clamp, through holes are arranged on the thin plates, the clamp 11 passes through the through holes on the thin plates on the two sides through a bolt I12 to be fastened with a nut II18, a hanging ring is arranged in the middle of the clamp 11 in the radial direction, and the steel wire rope 9 is connected with a force measuring device through the hanging ring.
During operation, pulling up the corn stubble to pull up the dynamometer force measuring bracket sleeve 9 and then spreading and fixing the corn stubble on the ground; before testing, the stems are placed in two round pipes of a clamp 11, a bolt I12 is fastened with a nut II18, the stems are firmly clamped by the two round pipes, and hanging rings on two sides of the clamp 11 are hung on a hook 6 through a steel wire rope 7; during testing, the digital display type push-pull dynamometer is opened, the hand wheel 2 is rotated, the hand wheel 2 drives the lead screw 4 to move upwards, rotary motion and linear motion are generated at the moment, the lead screw 4 drives the upper end cover 17, the sleeve 16 and the lower end cover 15 to move upwards, the lead screw can be rotated into the sleeve through the upper end cover, the sleeve can move upwards along the lead screw without rotation, rotary motion is converted into linear motion through the arrangement of the upper end cover 17, the sleeve 16 and the lower end cover 15, rotary motion is generated when the sleeve moves upwards, the connection between the lower end cover 15 and the suspension rod 10 only limits the freedom degree of the upward movement of the suspension rod 10, the suspension rod 10 cannot rotate when moving upwards, and the input rotary motion is converted into linear motion through the combined action of the upper end cover 17, the sleeve 16 and the lower end cover 15, so that the force measuring process is prevented from being influenced; the lower end cover 15 drives the digital display type push-pull dynamometer 7 of the force measuring device and the hook 6 to move upwards through the suspension rod 10, the hook 6 moves the clamp 11 upwards through the steel wire rope 7, the clamp 11 is fixed with the stem, the clamp 11 drives the root stubble, the root stubble is forcibly pulled out of the field, and the digital display type push-pull dynamometer 5 measures the stress in real time in the testing process and records the maximum value of the stress in the testing process.
The above embodiments are only used for illustrating the invention, and the structure and connection mode of the components can be changed, and the improvement and equivalent transformation of the connection and structure of the individual components according to the principle of the invention on the basis of the technical scheme of the invention should not be excluded from the protection scope of the invention.
Claims (1)
1. A corn stubble pulling-up dynamometer is characterized by comprising a dynamometric bracket, a stubble lifting device, a dynamometric device and a clamp; the stubble lifting device is arranged on the force measuring bracket, the force measuring device is arranged below the stubble lifting device, and the clamp and the force measuring device are connected through a steel wire rope;
the force measuring bracket comprises a sleeve and a boss; the sleeve is arranged below the boss and can be folded to support the boss; the center of the boss is provided with a threaded hole for connecting a lead screw; the force measuring bracket is used for supporting the screw rod; the number of the sleeves is three; the boss is disc-shaped;
the stubble lifting device comprises a hand wheel, a screw rod, an upper end cover, a sleeve, a lower end cover and a suspension rod; the hand wheel is arranged above the screw rod, and the screw rod is vertically arranged on a boss of the force measuring bracket; an upper end cover, a sleeve and a lower end cover are sequentially arranged between the screw rod and the force measuring device from top to bottom, and the upper end cover and the lower end cover are arranged at two ends of the sleeve; the sleeve is used for converting the rotary motion of the screw rod into linear motion to prevent the force measuring device from rotating; the lower end of the screw rod is connected with the upper end cover and can extend into the sleeve; the upper end of the suspension rod extends into the sleeve and is abutted against the upper surface of the lower end cover, and the lower end of the suspension rod is connected with a force measuring device; the force measuring device is a digital display type push-pull force meter, and a hook is connected below the digital display type push-pull force meter; the digital display type push-pull force meter is used for reading a stubble lifting force value in real time in the force measuring process;
the clamp consists of two semicircular circular tubes, the middle position of the outer side of each circular tube is provided with a hanging ring along the radial direction of the circular tube, and the hanging rings are connected with the hooks through steel wire ropes; the two semicircular round pipes are matched to form a cylinder for clamping the stem;
trapezoidal patterns are uniformly distributed on the inner wall of the round tube so as to increase the friction force between the clamp and the surface of the stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434075.4A CN107036748B (en) | 2017-06-09 | 2017-06-09 | Corn stubble pulling-up dynamometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434075.4A CN107036748B (en) | 2017-06-09 | 2017-06-09 | Corn stubble pulling-up dynamometer |
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| Publication Number | Publication Date |
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| CN107036748A CN107036748A (en) | 2017-08-11 |
| CN107036748B true CN107036748B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710434075.4A Active CN107036748B (en) | 2017-06-09 | 2017-06-09 | Corn stubble pulling-up dynamometer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356480A (en) * | 2017-09-05 | 2017-11-17 | 新疆农业科学院经济作物研究所 | Utilize the method for resistance to pull out force identification rape lodging resistance |
| CN107796550B (en) * | 2017-11-23 | 2023-09-15 | 湖北工业大学 | Device and method for measuring and calculating pulling resistance of actual section of in-situ plant root system soil |
| CN108489815B (en) * | 2018-05-23 | 2023-05-02 | 南京林业大学 | Flexible in-situ deceleration root system tension measuring device |
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