Crop stalk shear stress measuring device

Abstract

The utility model discloses a crop stalk shear stress measuring device, and belongs to the field of scientific research detection instruments, the crop stalk shear stress measuring device comprises a base, the side surface of the base is provided with a fixing assembly of which the position can be adjusted up and down, and the side surface of the fixing assembly is fixedly connected with a plate-type shear outer blade assembly; a hole type shearing inner blade capable of moving in an up-down pulling mode is assembled in the middle of the plate type shearing outer blade assembly, and a tension measuring assembly is assembled on the top of the hole type shearing inner blade. By arranging the air cylinder, a pneumatic rod of the air cylinder drives a movable plate to descend so that a first movable rod can descend, and the first movable rod descends to drive a second movable rod and a third movable rod to descend so that a clamping plate can descend; the clamping plate drives the sliding block to descend to clamp the stalks on the shearing outer blade assembly, so that the problem that the measured shearing stress is inaccurate due to the fact that the stalks are not tightly fixed during shearing and move during shearing is solved.

Description

Technical Field

[0001] This application relates to the field of scientific research and testing instruments, and more specifically, to a device for measuring the shear stress of crop stalks. Background Art

[0002] At present, China is vigorously promoting the application of devices for measuring the shear stress of crop stalks. The shear stress of crop stalks is one of the important indicators for measuring their lodging resistance. By measuring the shear stress of stalks under different varieties or growth conditions, it can provide key data support for agricultural scientific research and breeding, and help scientific researchers screen out excellent varieties with strong lodging resistance. A device for measuring the shear stress of crop stalks is of great necessity in agricultural scientific research, breeding, production practice, and mechanization development. Its application can not only provide key data support for scientific researchers, but also guide farmers to carry out scientific and reasonable cultivation management, improve the yield and quality of crops, and promote the sustainable development of agriculture.

[0003] The existing devices for measuring the shear stress of crop stalks have problems such as loose fixation of the stalks during shearing, movement of the stalks during shearing, resulting in inaccurate measured shear stress. At the same time, the existing devices for measuring the shear stress of crop stalks have problems such as different stalk shapes and the inability of the clamping molds to fully fit. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present utility model provides a device for measuring the shear stress of crop stalks, which solves the problems raised in the above background art. To achieve the above objectives, the present utility model is realized through the following technical solutions: A device for measuring the shear stress of crop stalks includes a base, a fixing component with adjustable vertical position is assembled on the side of the base, a plate-type shearing outer blade component is fixedly connected to the side of the fixing component, a hole-type shearing inner blade that can be pulled up and down is assembled in the middle of the plate-type shearing outer blade component, a tensile force measuring component is assembled at the top of the hole-type shearing inner blade, an installation plate is fixedly connected to the bottom of the hole-type shearing inner blade, clamping components are assembled on the upper and lower surfaces of the installation plate, the clamping components include cylinders, the cylinders are fixedly connected to the bottom of the installation plate, the top of the pneumatic rod of the cylinders is fixedly connected to a movable plate, the two sides of the movable plate are hinged with first movable rods, the top of the first movable rods is hinged with second movable rods, the top of the second movable rods is hinged with clamping plates, the bottom of the second movable rods is hinged with third movable rods, the bottom of the third movable rods is hinged with the installation plate, and two support rods are fixedly connected to both ends of the top of the installation plate, and the upper ends of the support rods are slidably connected to the clamping plates.

[0005] Preferably, two of the clamping components are assembled on both sides of the hole-type shearing inner blade.

[0006] Preferably, the clamping plate is located outside the vertical position of the plate-type shear outer blade assembly.

[0007] Preferably, the length of the third movable rod is the same as the distance between the highest point of the movement track of the movable plate and the upper surface of the mounting plate.

[0008] Preferably, a clamping sleeve is fixedly connected to the bottom of the clamping plate, a spring is fixedly connected to the inner wall of the top of the clamping sleeve, and a sliding block is fixedly connected to the bottom of the spring.

[0009] Preferably, a plurality of clamping sleeves are arranged at the bottom of the clamping plate, and the width of the clamping sleeve is wider than the diameter of the bottommost circular arc of the blade hole inside the hole-type shear inner blade.

[0010] The advantages of the present application are as follows:

[0011] (1) In the present application, by arranging a cylinder, the pneumatic rod of the cylinder drives the movable plate to descend, so that the first movable rod descends. The descent of the first movable rod drives the second movable rod and the third movable rod to descend, so that the clamping plate descends. The clamping plate drives the sliding block to descend to clamp the stalk on the shear outer blade assembly, thus solving the problems that the stalk is not firmly fixed during shearing, the stalk moves during shearing, and the measured shearing stress is inaccurate.

[0012] (2) In the present application, by arranging a sliding block, the sliding block contacts the stalk. According to the different shapes of the stalks, the stalks squeeze the sliding block, causing the spring to contract into the clamping sleeve, thus solving the problem that the shapes of the stalks are different and the clamping mold cannot be completely fitted. Brief Description of the Drawings

[0013] The drawings constituting a part of the present application are used to provide a further understanding of the present application, making other features, objects, and advantages of the present application more obvious. The schematic embodiments and descriptions of the drawings of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0014] Figure 1 is the three-dimensional stereoscopic external view of the present utility model;

[0015] Figure 2 is the partial side sectional view of the present utility model;

[0016] Figure 3 is the enlarged view at A of the present utility model;

[0017] Figure 4 is the enlarged view at B of the present utility model.

[0018] In the above figures,

[0019] 1. Base; 2. Fixing component; 3. Shearing outer blade component; 4. Hole-type shearing inner blade; 5. Tensile force measuring component; 6. Mounting plate; 7. Clamping component; 701. Cylinder; 702. Movable plate; 703. First movable rod; 704. Second movable rod; 705. Clamping plate; 706. Third movable rod; 707. Support rod; 8. Clamping sleeve; 9. Spring; 10. Sliding block. Detailed implementation manners

[0020] In order to enable those skilled in the art of this technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this application.

[0021] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0022] Embodiment 1

[0023] See Figures 1-4, this embodiment provides a device for measuring the shear stress of crop stalks, including a base 1. A fixed component 2 with adjustable vertical position is assembled on the side of the base 1. A plate-type shear outer blade component 3 is fixedly connected to the side of the fixed component 2. A hole-type shear inner blade 4 that can be pulled up and down is assembled in the middle of the plate-type shear outer blade component 3. Compared with traditional tools, the hole-type shear inner blade 4 is more convenient and safe to operate, reducing the risk for operators. A tensile force measuring component 5 is assembled at the top of the hole-type shear inner blade 4. The bottom of the hole-type shear inner blade 4 is fixedly connected to a mounting plate 6. Clamping components 7 are assembled on the upper and lower surfaces of the mounting plate 6. The clamping component 7 includes a cylinder 701. The cylinder 701 is fixedly connected to the bottom of the mounting plate 6. The top of the pneumatic rod of the cylinder 701 is fixedly connected to a movable plate 702. The two sides of the movable plate 702 are hinged with first movable rods 703. The top of the first movable rod 703 is hinged with a second movable rod 704. The top of the second movable rod 704 is hinged with a clamping plate 705. The bottom of the second movable rod 704 is hinged with a third movable rod 706. The length of the third movable rod 706 is the same as the distance between the highest point of the movement track of the movable plate 702 and the upper surface of the mounting plate 6. This makes the third movable rod 706 and the second movable rod 704 keep straight in the vertical direction when the cylinder 701 is not started, supporting the clamping plate 705 to prevent the clamping plate 705 from sliding down in the idle state. The bottom of the third movable rod 706 is hinged with the mounting plate 6. The two ends of the top of the mounting plate 6 are fixedly connected with support rods 707. The upper ends of the support rods 707 are slidably connected with the clamping plate 705. The clamping plate 705 is located outside the vertical position of the plate-type shear outer blade component 3. This makes the plate-type shear outer blade component 3 and the clamping plate 705 not collide. Two clamping components 7 are assembled on both sides of the hole-type shear inner blade 4. This enables the stalk to be fixed on both sides of the hole-type shear inner blade 4. In this application, by setting the cylinder 701, the pneumatic rod of the cylinder 701 drives the movable plate 702 to descend, causing the first movable rod 703 to descend. The descent of the first movable rod 703 drives the second movable rod 704 and the third movable rod 706 to descend, causing the clamping plate 705 to descend. The clamping plate 705 drives the sliding block 10 to descend to clamp the stalk above the shear outer blade component 3, thus solving the problems of loose fixation of the stalk during shearing, movement of the stalk during shearing, and inaccurate measurement of the shear stress caused thereby.

[0024] When the above device is specifically used, the crop stalk is placed between the inner cutting edge of the hole-type shear inner blade 4 and the clamping components 7 on both sides. The cylinder 701 is started. The pneumatic rod of the cylinder 701 drives the movable plate 702 to descend, causing the first movable rod 703 to descend. The descent of the first movable rod 703 drives the second movable rod 704 and the third movable rod 706 to descend, causing the clamping plate 705 to descend. The clamping plate 705 drives the sliding block 10 to descend to clamp the stalk above the shear outer blade component 3.

[0025] Embodiment 2

[0026] See Figures 1-4 , on the basis of Embodiment 1, in this application, by providing a clamping plate 705, a clamping sleeve 8 is fixedly connected to the bottom of the clamping plate 705, and a spring 9 is fixedly connected to the inner wall of the top of the clamping sleeve 8. The spring 9 can undergo elastic deformation when subjected to an external force, that is, it deforms under the action of an external force and can quickly return to its original state when the external force is removed. The bottom of the spring 9 is fixedly connected to a sliding block 10. A plurality of clamping sleeves 8 are provided at the bottom of the clamping plate 705, and the width of the clamping sleeve 8 is wider than the diameter of the bottommost circular arc of the blade hole inside the hole-type shear inner blade 4. So that the upper part of the stem can be fully covered by the sliding block 10. By providing the sliding block 10 in this application, the sliding block 10 contacts the stem. According to the different shapes of the stem, the stem squeezes the sliding block 10, causing the spring 9 to contract into the clamping sleeve 8, thus solving the problem that the clamping mold cannot fully fit due to the different shapes of the stem.

[0027] When the above device is specifically used, the sliding block 10 contacts the stem. According to the different shapes of the stem, the stem squeezes the sliding block 10, causing the spring 9 to contract into the clamping sleeve 8 to fully clamp the stem. Pull up the tensile force measuring component 5 to drive the hole-type shear inner blade 4 to lift the stem. When the stem moves to the shear outer blade assembly 3, it is sheared. Read the value of the tensile force measuring component 5 at this time and calculate to obtain the shear stress of the stem. Reset the tensile force measuring component 5 to drive the hole-type shear inner blade 4 to reset. Start the cylinder 701. The pneumatic rod of the cylinder 701 rises to drive the clamping component 7 to reset. Remove the sheared stem to complete the operation.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A measuring device for the shear stress of crop stalks, comprising a base (1), a fixing component (2) with an adjustable position up and down is assembled on the side of the base (1), a plate-type shear outer blade component (3) is fixedly connected to the side of the fixing component (2), a hole-type shear inner blade (4) that can be pulled up and down and moved is assembled in the middle of the plate-type shear outer blade component (3), and a tensile force measuring component (5) is assembled on the top of the hole-type shear inner blade (4). It is characterized in that A mounting plate (6) is fixedly connected to the bottom of the hole-type shear inner blade (4), clamping components (7) are assembled on the upper and lower surfaces of the mounting plate (6), the clamping component (7) includes a cylinder (701), the cylinder (701) is fixedly connected to the bottom of the mounting plate (6), the top of the pneumatic rod of the cylinder (701) is fixedly connected to a movable plate (702), first movable rods (703) are hinged on both sides of the movable plate (702), a second movable rod (704) is hinged to the top of the first movable rod (703), a clamping plate (705) is hinged to the top of the second movable rod (704), a third movable rod (706) is hinged to the bottom of the second movable rod (704), the third movable rod (706) is hinged to the mounting plate (6) at the bottom, and support rods (707) are fixedly connected to both ends of the top of the mounting plate (6), and the upper ends of the support rods (707) are slidably connected to the clamping plate (705).

2. The crop stalk shear stress measuring device according to claim 1, characterized in that, Two of the clamping components (7) are assembled on both sides of the hole-type shear inner blade (4).

3. The crop stalk shear stress measuring device according to claim 1, characterized in that, The clamping plate (705) is located outside the vertical position of the plate-type shear outer blade component (3).

4. The crop stalk shear stress measuring device according to claim 1, characterized in that, The length of the third movable rod (706) is the same as the distance between the highest point of the movement track of the movable plate (702) and the upper surface of the mounting plate (6).

5. The crop stalk shear stress measuring device according to claim 1, characterized in that, A clamping sleeve (8) is fixedly connected to the bottom of the clamping plate (705), a spring (9) is fixedly connected to the inner wall of the top of the clamping sleeve (8), and a sliding block (10) is fixedly connected to the bottom of the spring (9).

6. The crop stalk shear stress measurement device according to claim 1, wherein, A plurality of clamping sleeves (8) are arranged at the bottom of the clamping plate (705), and the width of the clamping sleeve (8) is wider than the diameter of the bottommost circular arc of the blade hole inside the hole-type shear inner blade (4).

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