Fixing device for agricultural material stretching or compression test
By using rubber or silicone as a buffer medium and bolt and nut structure in the fixing device, the problems of difficulty in fixing fruits and vegetables and easy damage are solved, achieving stable clamping and versatility, and reducing the risk of test damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-04-03
AI Technical Summary
Existing fruit and vegetable fixing clamps have problems such as difficulty in fixing samples, easy damage, and poor clamp versatility in mechanical performance testing, especially for soft fruit and vegetable samples.
Design a fixing device that uses rubber or silicone as a buffer medium between the upper and lower fixing plates to tightly fit fruits and vegetables, buffering the pressure from the fixing device, and achieves stable clamping through a long bolt and nut structure, adapting to fruits and vegetables of different sizes.
It effectively avoids damage to the skin and flesh of fruits and vegetables, improves the versatility of the fixing device, reduces testing costs, and ensures the integrity of the test samples.
Smart Images
Figure CN224081324U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of agricultural production technology, and in particular relates to a fixing device for tensile or compression testing of agricultural materials. Background Technology
[0002] In the field of intelligent harvesting robot research and development, the automated harvesting of fruits with stems (such as apples and pears) and vegetables with stems (such as tomatoes) requires precise mechanical property testing to obtain key mechanical parameters of the stems, including tensile strength, compressive strength, and fracture strength. However, existing fruit and vegetable fixing clamps have obvious limitations, especially for soft fruit and vegetable samples. They generally suffer from technical bottlenecks such as difficulty in fixing test samples, easy damage to samples, and low versatility of clamps. Therefore, we propose a fixing device for tensile or compression testing of agricultural materials to solve any of the above problems. Utility Model Content
[0003] The purpose of this invention is to provide a fixing device for tensile or compression tests on agricultural materials. By placing rubber or silicone between the lower surface of the upper fixing plate and the lower fixing nut, the rubber or silicone directly contacts the fruits and vegetables to be fixed. During the tensile or compression test, it closely adheres to the fruits and vegetables, becoming a buffer medium between the fixing device and the fruits and vegetables. This effectively buffers the pressure from the fixing device, preventing damage to the fruit and vegetable skin or flesh due to excessive pressure. It greatly reduces the risk of damage to fruits and vegetables during the test, ensuring the integrity of the test sample. This invention solves the obvious limitations of existing fruit and vegetable fixing clamps, especially for soft fruit and vegetable samples, where the test samples are easily damaged.
[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0005] This utility model discloses a fixing device for tensile or compression tests on agricultural materials, comprising an upper fixing plate and a lower fixing plate. The upper fixing plate is used to fix the stem- or stalk-bearing end of fruits or vegetables. During compression or puncture tests, it aligns with the area of the fruit or vegetable to be squeezed or punctured through a central hole, and works with other components to compress the fruit or vegetable, thus fixing and positioning the agricultural material. The lower fixing plate is the basic component of the entire fixing device, used to connect to the base of the testing machine, providing a stable support platform. During tensile tests, the bottom of the fruit or vegetable is placed on it; during compression or puncture tests, the fruit or vegetable is placed on top.
[0006] The bottom of the upper fixing plate is fixedly connected with rubber or silicone, which is used to prevent damage to agricultural materials during stretching or compression operations, and plays a role in protecting and cushioning agricultural materials.
[0007] Furthermore, four long bolts are fixedly connected to the top of the lower fixing plate, and the four long bolts are installed on the top of the lower fixing plate by welding or gluing.
[0008] Furthermore, the outer walls of the four long bolts are all connected with upper fixing nuts by threads. The upper fixing nuts are used in conjunction with the long bolts and the upper fixing plate. By tightening the upper fixing nuts, the pressure on the upper fixing plate is adjusted, thereby achieving the pressing and fixing of agricultural materials.
[0009] Furthermore, a washer is installed between the bottom of each of the four upper fixing nuts and the upper surface of the upper fixing plate, and each of the four washeres is sleeved on the outer wall of the corresponding long bolt and slidably connected to the corresponding long bolt.
[0010] Furthermore, the four gaskets are used in conjunction with the corresponding upper fixing nuts and placed between the upper fixing plate and the corresponding upper fixing nuts. This increases the force-bearing area, disperses pressure, and prevents the surface of the upper fixing plate from being damaged by the upper fixing nuts, while also making the fixation more stable.
[0011] Furthermore, the outer walls of the four long bolts are all threaded with lower fixing nuts. The four lower fixing nuts are used to fix the lower surface of the upper fixing plate. By adjusting the lower fixing nuts, the degree of contact between the rubber or silicone and the agricultural material can be adjusted.
[0012] Furthermore, the lower fixing plate is provided with four bolt holes for inserting φ8mm bolts to connect the lower fixing plate to the base of the testing machine.
[0013] This utility model has the following beneficial effects:
[0014] 1. By placing rubber or silicone between the lower surface of the upper fixing plate and the lower fixing nut, the rubber or silicone can directly contact the fruits and vegetables to be fixed. During the tensile or compression test, it fits tightly against the fruits and vegetables, becoming a buffer medium between the fixing device and the fruits and vegetables. This effectively buffers the pressure from the fixing device, avoiding damage to the fruit and vegetable skin or flesh due to excessive pressure. It greatly reduces the risk of damage to the fruits and vegetables during the test and ensures the integrity of the test sample.
[0015] 2. By installing a long bolt on the top of the lower fixing plate, and then screwing the lower fixing nut, upper fixing plate, washer, and upper fixing nut in sequence from above the long bolt, and tightening the upper fixing nut to press the fruit or vegetable, it is possible to flexibly and stably clamp fruits and vegetables of different sizes. This greatly improves the versatility of the fixing device, avoids the trouble of frequently changing different clamps due to differences in the size of fruits and vegetables, and saves testing costs.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a bottom view of the structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the upper fixing plate of this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the long bolt of this utility model.
[0022] The attached diagram lists the components represented by each number as follows:
[0023] 1. Long bolt; 2. Upper fixing plate; 3. Upper fixing nut; 4. Washer; 5. Rubber or silicone; 6. Lower fixing nut; 7. Lower fixing plate; 8. Bolt hole. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-4As shown, this utility model is a fixing device for tensile or compression tests of agricultural materials, including an upper fixing plate 2 and a lower fixing plate 7. The upper fixing plate 2 is used to fix the stem end of fruits or vegetables with stems. During compression or puncture tests, it is aligned with the part of the fruit or vegetable to be squeezed or punctured through the central hole, and together with other components, it presses the fruit or vegetable tightly, thus fixing and positioning the agricultural material. The lower fixing plate 7 is the basic component of the entire fixing device, used to connect to the base of the testing machine, providing a stable support platform. During tensile tests, the bottom of the fruit or vegetable with stem is placed on it; during compression or puncture tests, the fruit or vegetable is placed on it. Rubber or silicone 5 is fixedly connected to the bottom of the upper fixing plate 2. The rubber or silicone 5 is used to fix the fruit or vegetable with stems in the tensile test. To prevent damage to agricultural materials during stretching or compression operations, this device protects and cushions the materials. Rubber or silicone 5 is placed between the lower surface of the upper fixing plate 2 and the lower fixing nut 6, allowing the rubber or silicone 5 to directly contact the fruits and vegetables to be fixed. During the stretching or compression test, it tightly adheres to the fruits and vegetables, acting as a buffer between the fixing device and the fruits and vegetables. This effectively buffers the pressure from the fixing device, preventing damage to the fruit and vegetable skin or flesh due to excessive pressure, significantly reducing the risk of damage during testing and ensuring the integrity of the test samples. Four long bolts 1 are fixedly connected to the top of the lower fixing plate 7. These four long bolts 1 are installed on the top of the lower fixing plate 7 by welding or gluing. The outer walls of the four long bolts 1... Each of the four upper fixing nuts 3 is threadedly connected to the upper fixing plate 2. The upper fixing nuts 3 work in conjunction with the long bolts 1 and the upper fixing plate 2. Tightening the upper fixing nuts 3 adjusts the pressure on the upper fixing plate 2, thereby achieving the compaction and fixation of the agricultural material. A washer 4 is installed between the bottom of each of the four upper fixing nuts 3 and the upper surface of the upper fixing plate 2. Each of the four washer 4 is fitted onto the outer wall of the corresponding long bolt 1 and slidably connected to it. The four washer 4, used in conjunction with the corresponding upper fixing nuts 3, are placed between the upper fixing plate 2 and the corresponding upper fixing nuts 3 to increase the force-bearing area, distribute pressure, prevent damage to the surface of the upper fixing plate 2 from the upper fixing nuts 3, and simultaneously make the fixation more stable. Each of the four long bolts 1 has a lower fixing nut 6 threadedly connected to its outer wall. The fixing nut 6 is used to fix the lower surface of the upper fixing plate 2. By adjusting the fixing nut 6, the contact degree between the rubber or silicone 5 and the agricultural material can be adjusted. The lower fixing plate 7 has four bolt holes 8, which are used to insert φ8mm bolts to connect the lower fixing plate 7 to the base of the testing machine. By installing the long bolt 1 on the top of the lower fixing plate 7, and then screwing the lower fixing nut 6, the upper fixing plate 2, the washer 4, and the upper fixing nut 3 in sequence from above the long bolt 1, and tightening the upper fixing nut 3 to press the fruit or vegetable, it is possible to flexibly and stably clamp fruits and vegetables of different sizes, which greatly improves the versatility of the fixing device, avoids the trouble of frequently changing different clamps due to differences in the size of fruits and vegetables, and saves testing costs.
[0026] A specific application of this embodiment is that the dimensions of the upper fixing plate 2 and the lower fixing plate 7 are 200mm × 200mm × 2mm;
[0027] The dimensions of the rubber or silicone 5 are: φ184mm × 2mm;
[0028] The upper fixing plate 2, rubber or silicone 5, and the lower fixing plate 7 have a central circular hole with a size of φ20mm;
[0029] Long bolt 1 is an M8 hex head bolt with dimensions of φ8mm × 100mm;
[0030] The upper fixing nut 3 and the lower fixing nut 6 are M8 nuts used in conjunction with the long bolt 1, with dmax = 8.75mm;
[0031] Washer 4 is used in conjunction with long bolt 1. Washer 4 has a diameter of d1 = 8.4 mm.
[0032] When using this device, first insert the φ8mm bolt into the bolt hole 8 to connect the device to the base of the testing machine, thus firmly fixing the device on the testing machine. During the tensile test, first place the bottom of the fruit or vegetable with a stem on the lower fixed plate and adjust its position. Pass the end with the stem through the center hole on the upper fixed plate 2. Then, place the rubber or silicone 5, the upper fixed plate 2, and the gasket 4 in sequence. Adjust the four lower fixing nuts 6 to ensure the rubber or silicone contacts the fruit or vegetable. Then, place the upper fixed plate 2, gasket 4, and upper fixing nuts 3 sequentially from above the long bolt 1. Screw in and press the fruit or vegetable by tightening the upper fixing nut 3. When compressing or piercing fruits or vegetables with a diameter of 20 mm or more, first place the fruit or vegetable on the lower fixing plate and adjust its position so that the part to be squeezed or pierced is exactly in the center hole on the upper fixing plate 2. Then place the rubber or silicone 5, the upper fixing plate 2, and the gasket 4 in sequence. Adjust the four lower fixing nuts 6 so that the rubber or silicone comes into contact with the fruit or vegetable. Then screw the upper fixing plate 2, the gasket 4, and the upper fixing nut 3 in sequence from above the long bolt 1 and press the fruit or vegetable by tightening the upper fixing nut 3.
[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A fixture for agricultural material tensile or compression testing, characterized by: The upper fixing plate (2) is used for fixing one end of the fruit with stalk or the vegetable with stem, and the lower fixing plate (7) is the base part of the whole fixing device, which is used for being connected with the base of the testing machine to provide a stable support platform. The bottom of the upper fixing plate (2) is fixedly connected with rubber or silica gel (5), which is used for preventing the agricultural materials from being damaged during the stretching or compression operation, and plays a role of protecting and buffering the agricultural materials.
2. A fixture for tensile or compressive testing of agricultural materials according to claim 1, wherein, The top of the lower fixing plate (7) is fixedly connected with four long bolts (1), which are installed on the top of the lower fixing plate (7) by welding or gluing.
3. A fixture for tensile or compressive testing of agricultural materials according to claim 2, wherein, The outer wall surface of the four long bolts (1) is threadedly connected with the upper fixing nut (3), which is used in cooperation with the long bolt (1) and the upper fixing plate (2), and the pressure on the upper fixing plate (2) is adjusted by tightening the upper fixing nut (3), so that the agricultural materials are tightly fixed.
4. A fixture for tensile or compressive testing of agricultural materials according to claim 3, wherein, The bottom of the four upper fixing nuts (3) and the upper surface of the upper fixing plate (2) are both installed with the gasket (4), and the four gaskets (4) are sleeved on the outer wall of the corresponding long bolt (1) and are in sliding connection with the corresponding long bolt (1).
5. A fixture for tensile or compressive testing of agricultural materials according to claim 4, wherein, The four gaskets (4) are used in cooperation with the corresponding upper fixing nut (3), which are placed between the upper fixing plate (2) and the corresponding upper fixing nut (3), and play a role of increasing the stress area, dispersing the pressure, preventing the surface of the upper fixing plate (2) from being damaged by the upper fixing nut (3), and making the fixing more stable.
6. A fixture for tensile or compressive testing of agricultural materials according to claim 5, wherein, The outer wall of the four long bolts (1) is threadedly connected with the lower fixing nut (6), and the four lower fixing nuts (6) are used for fixing the lower surface of the upper fixing plate (2), and the contact degree of the rubber or silica gel (5) and the agricultural materials can be adjusted by adjusting the lower fixing nut (6).
7. A fixture for tensile or compressive testing of agricultural materials according to claim 6, wherein, The lower fixing plate (7) is provided with four bolt holes (8), and the four bolt holes (8) are used for penetrating the φ8mm bolt to realize the connection between the lower fixing plate (7) and the testing machine base.