Bending creep test device for bamboo
By designing the frame components and clamp loading components, the force application area is increased and friction is used to prevent the loading position from shifting, thus solving the problems of surface damage and shifting in the bamboo bending creep test and improving the test accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 湖南工商大学
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-03
AI Technical Summary
In bamboo bending creep tests, existing techniques can easily lead to damage to the bamboo surface and displacement of the loading position, affecting the accuracy of the test.
The bamboo is supported at both ends by a frame assembly. The load is applied by clamps and loading components through clamping grooves and rings, which increases the force application area and prevents the loading position from shifting through friction. The clamps are equipped with buffers to reduce the possibility of damage.
This improves the accuracy of bamboo bending creep tests, reduces the possibility of bamboo surface damage and loading position displacement, and ensures the accuracy of test results.
Smart Images
Figure CN224456441U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of bamboo testing devices, and in particular to a bamboo bending creep testing device. Background Technology
[0002] With increasing global emphasis on environmental protection and a gradual decline in global timber supply, the rational utilization and development of bamboo resources are receiving growing attention, and bamboo products are becoming important consumer goods. In related technologies, during the bending creep test of bamboo, concentrated loads are typically applied directly to the bamboo. This can easily damage the bamboo surface; furthermore, the significant deflection generated during loading causes the bamboo to sag downwards, potentially shifting the application position of the concentrated load and affecting the accuracy of the test results. Utility Model Content
[0003] This invention provides a bamboo bending creep testing device, the purpose of which is to improve the testing accuracy of bamboo bending creep tests.
[0004] To achieve the above objectives, this utility model provides a bamboo bending creep testing device, comprising:
[0005] The frame components are configured to support both ends of the bamboo along its extension direction;
[0006] A clamp is disposed on the outer periphery of the bamboo material. The clamp has a clamping groove disposed on the surface of the clamp near the bamboo material. The clamping groove is arranged along the extension direction of the bamboo material and is configured to accommodate a portion of the bamboo material to increase the clamping area between the clamp and the bamboo material.
[0007] The loading component includes a ring and a gravity member. The gravity member is vertically positioned below the bamboo material. The ring is fitted onto the clamp at its upper part along the vertical direction, and the ring is fitted onto the gravity member at its lower part along the vertical direction, so that the loading component can apply a load to the bamboo material through the clamp.
[0008] In one embodiment, the clamp has a groove disposed on the surface of the clamp opposite to the bamboo material, and the ring buckle is disposed in the groove along the upper part of the vertical direction.
[0009] In one embodiment, the bamboo bending creep testing device includes a buffer element disposed between the clamp and the bamboo, and the buffer element is at least partially disposed within the clamping groove.
[0010] In one embodiment, the number of clamps is two, and the two clamps are respectively disposed at two third points along the extension direction of the bamboo.
[0011] In one embodiment, the gravity member extends along the extension direction of the bamboo material, and there are two rings. The upper part of the two rings along the vertical direction is respectively fitted onto the corresponding clamps, and the lower part of the two rings along the vertical direction is respectively fitted onto the gravity member.
[0012] In one embodiment, the clamps at each force application point of the bamboo are arranged in pairs, and the pairs of clamps are symmetrically arranged on the outer periphery of the bamboo along the vertical direction.
[0013] The above-mentioned solution of this utility model has the following beneficial effects:
[0014] In this embodiment, the upper part of the ring is fitted onto the clamp along the vertical direction, and the lower part of the ring is fitted onto the gravity member, so that the loading component can apply a load to the bamboo through the clamp. On the one hand, the dimension of the clamp along the extension direction of the bamboo is larger than the dimension of the ring along the extension direction of the bamboo, and at least a part of the bamboo structure is located in the clamping groove. Compared with the ring being directly fitted onto the bamboo, the test device of this application increases the force application area of the gravity member acting on the bamboo, reducing the possibility of damage to the bamboo surface. On the other hand, under the gravity of the gravity member, the groove wall of the clamping groove and the bamboo surface can generate a large frictional force. During the loading process, when the bamboo is concave downward, the frictional force between the groove wall of the clamping groove and the bamboo surface can reduce the possibility of the clamp moving relative to the bamboo along the extension direction of the bamboo, thereby reducing the possibility of the loading position of the bamboo shifting, which is beneficial to improving the test accuracy of the bamboo bending creep test.
[0015] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the bamboo bending creep test device in one embodiment of the present invention;
[0017] Figure 2 This is a front view structural schematic diagram of the bamboo bending creep test device in one embodiment of the present invention;
[0018] Figure 3 This is a side view of the bamboo bending creep test device in one embodiment of the present invention.
[0019] Figure 4 This is a schematic diagram of the assembly of the clamp and bamboo material in one embodiment of the present invention.
[0020] [Explanation of Labels in the Attached Image]
[0021] 1. Frame assembly; 2. Fixture; 21. Clamping slot; 22. Groove; 3. Loading assembly; 31. Ring buckle; 32. Gravity component; 321. Weight; 322. Tray; 4. Buffer component; 5. Bamboo material. Detailed Implementation
[0022] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a locking connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] This application provides a bending creep resistance testing device for bamboo material 5, used to study the bending creep resistance of bamboo material 5. Bamboo material 5 has a certain degree of flexibility and is prone to deflection under external force. For details, please refer to... Figure 1 and Figure 4The bamboo 5 bending creep testing device includes a frame assembly 1, clamps 2, and a loading assembly 3. The frame assembly 1 is configured to support both ends of the bamboo 5 along its extension direction. For example, the frame assembly 1 can be constructed from steel columns and / or I-beams, allowing the two ends of the bamboo 5 along its extension direction to be supported on the frame assembly 1, i.e., on the crossbeams of the frame assembly 1, thus enabling the bamboo 5 to form a structure similar to a simply supported beam with both ends supported. The clamps 2 can be made of a material with sufficient strength and stiffness, such as metal. (See also...) Figures 1-3 The clamp 2 is disposed on the outer periphery of the bamboo material 5. For example, the clamp 2 can be disposed as follows: Figure 1 The clamp 2 is positioned on the upper part of the outer periphery of the bamboo material 5. The clamp 2 has a clamping groove 21, which is located on the surface of the clamp 2 near the bamboo material 5. The clamping groove 21 is arranged along the extending direction of the bamboo material 5 and is configured to accommodate the portion of the bamboo material 5. Since the outer periphery of the bamboo material 5 is approximately circular, the groove wall of the clamping groove 21 can also be configured as an arc shape, with a curvature equal to or similar to the curvature of the outer periphery of the bamboo material 5, to increase the clamping area of the clamping groove 21 acting on the outer periphery of the bamboo material 5, thus facilitating better clamping of the bamboo material 5 by the clamp 2. The loading component 3 includes a ring buckle 31 and a gravity member 32. The ring buckle 31 can be made of a material with a certain degree of flexibility and hardness, such as a steel cable. The ring buckle 31 can be formed by connecting the ends of a steel cable. The gravity component 32 is vertically positioned below the bamboo material 5, and the upper part of the ring 31 is fitted onto the clamp 2 vertically, while the lower part of the ring 31 is fitted onto the gravity component 32 vertically, so that the loading component 3 can apply a load to the bamboo material 5 through the clamp 2.
[0026] For example, please refer to Figures 1-3 The clamp 2 is positioned above the bamboo material 5, with at least a portion of the bamboo material 5 located within the clamping groove 21. The gravity member 32 is positioned below the bamboo material 5 and may include a tray 322 and a weight 321. The weight 321 is positioned on the tray 322. A steel cable loop 31 is vertically connected to the upper part of the clamp 2 on the side of the clamp 2 away from the bamboo material 5, and vertically connected to the lower part of the tray 322 on the side of the tray 322 away from the weight 321. The loop 31 does not directly contact the bamboo material 5, allowing the weight of the weight 321 to be transferred through the tray 322 to the loop 31, and then from the loop 31 to the clamp 2, so that the weight of the weight 321 acts on the bamboo material 5 through the clamp 2. This is to study the bending and creep resistance of the bamboo material 5 under the constant gravity of the weight 321.
[0027] For example, the vertical direction is the direction of gravity, such as... Figures 1-3 The direction indicated by R1.
[0028] In this embodiment, the upper part of the ring 31 is fitted onto the clamp 2 in the vertical direction, and the lower part of the ring 31 is fitted onto the gravity member 32 in the vertical direction, so that the loading component 3 can apply a load to the bamboo material 5 through the clamp 2. On the one hand, the dimension of the clamp 2 along the extension direction of the bamboo material 5 is larger than the dimension of the ring 31 along the extension direction of the bamboo material 5, and at least a part of the structure of the bamboo material 5 is located in the clamping groove 21. Compared with the ring 31 being directly fitted onto the bamboo material 5, the test device of this application increases the gravity of the gravity member 32 acting on the bamboo material 5. The force area reduces the possibility of damage to the surface of bamboo 5; on the other hand, under the gravity of the gravity member 32, the groove wall of the clamping groove 21 and the surface of bamboo 5 can generate a large frictional force. During the loading process, when bamboo 5 is concave downward, the frictional force between the groove wall of the clamping groove 21 and the surface of bamboo 5 can reduce the possibility of the clamp 2 moving relative to bamboo 5 along the extension direction of bamboo 5, thereby reducing the possibility of the loading position of bamboo 5 shifting, which is beneficial to improving the test accuracy of the bending creep test of bamboo 5.
[0029] In one embodiment, please refer to Figure 4 The clamp 2 has a groove 22, which is disposed on the surface of the clamp 2 away from the bamboo material 5. The upper part of the ring 31 in the vertical direction is disposed in the groove 22 to reduce the possibility of the upper part of the ring 31 in the vertical direction moving relative to the clamp 2 along the extension direction of the bamboo material 5, thereby reducing the possibility of the loading position of the bamboo material 5 shifting, which is beneficial to improving the test accuracy of the bending creep test of the bamboo material 5.
[0030] For example, please refer to Figure 4 The extension direction of the groove 22 can be arranged to intersect with the extension direction of the clamping groove 21. The ring 31 is embedded in the groove 22 at the upper part of the vertical direction, which can reduce the possibility of the ring 31 touching the bamboo material 5 and help improve the test accuracy of the bending creep test of the bamboo material 5.
[0031] In one embodiment, please refer to Figure 4 The bamboo material 5 bending creep test device includes a buffer 4, which is disposed between the clamp 2 and the bamboo material 5. The buffer 4 is at least partially disposed in the clamping groove 21. During the loading process of the bamboo material 5, the buffer 4 can wrap the bamboo material 5 and buffer the clamping force applied by the clamp 2 to the bamboo material 5 to reduce the possibility that the rigid clamp 2 will damage the surface of the bamboo material 5 during the loading process.
[0032] For example, the buffer 4 can be an elastic pad. During the loading process of the bamboo material 5, the rigid clamp 2 does not directly contact the bamboo material 5, but acts on the surface of the bamboo material 5 through the elastic pad. This allows the relatively sharp edge of the clamping groove 21 to better offset the damage to the surface of the bamboo material 5 by the elastic pad, thereby reducing the possibility of the rigid clamp 2 damaging the surface of the bamboo material 5 during the loading process.
[0033] In one embodiment, please refer to Figure 1 The number of clamps 2 is two, and the two clamps 2 are respectively set at two third points along the extension direction of the bamboo material 5, so that the test device of this application can apply the concentrated load of the gravity member 32 to the bamboo material 5 more evenly, which is beneficial to improving the accuracy of the test results.
[0034] It is understood that the number of clamps 2 is not limited to two. For example, the number of clamps 2 can be one, with one clamp 2 set at the middle position of the bamboo 5 along the extension direction; the number of clamps 2 can also be three, with three clamps 2 respectively set at three quarter points of the bamboo 5 along the extension direction.
[0035] In one embodiment, please refer to Figure 1 and Figure 3 The gravity member 32 extends along the extension direction of the bamboo material 5. There are two rings 31. The upper part of the two rings 31 along the vertical direction is respectively fitted onto the corresponding clamps 2, and the lower part of the two rings 31 along the vertical direction is respectively fitted onto the gravity member 32. This means that the test device of this application only needs to be set with one gravity member 32 to apply equal concentrated loads at two third points along the extension direction of the bamboo material 5. The structure is relatively simple and the operation is relatively convenient.
[0036] In one embodiment, please refer to Figure 2 The clamps 2 at each force application point of the bamboo material 5 are arranged in pairs. The pairs of clamps 2 are symmetrically arranged on the outer periphery of the bamboo material 5 in the vertical direction, so that the clamping grooves 21 of the pairs of clamps 2 are arranged opposite each other in the vertical direction. The pairs of clamps 2 can be bolted together to form a whole, so that the bamboo material 5 can be firmly clamped by the clamping grooves 21 of the two pairs of clamps 2, reducing the possibility of the clamps 2 rotating relative to the outer periphery of the bamboo material 5, and thus reducing the possibility of the clamps 2 falling off the bamboo material 5.
[0037] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A device for testing the bending creep resistance of bamboo, characterized in that, include: The frame components are configured to support both ends of the bamboo along its extension direction; A clamp is disposed on the outer periphery of the bamboo material. The clamp has a clamping groove disposed on the surface of the clamp near the bamboo material. The clamping groove is arranged along the extension direction of the bamboo material and is configured to accommodate a portion of the bamboo material to increase the clamping area between the clamp and the bamboo material. The loading component includes a ring and a gravity member. The gravity member is vertically positioned below the bamboo material. The ring is fitted onto the clamp at its upper part along the vertical direction, and the ring is fitted onto the gravity member at its lower part along the vertical direction, so that the loading component can apply a load to the bamboo material through the clamp.
2. The device for testing the bending creep resistance of bamboo according to claim 1, wherein, The clamp has a groove on the surface of the clamp facing away from the bamboo material, and the ring buckle is disposed in the groove along the upper part of the vertical direction. 3.The bamboo bending creep resistance test device according to claim 1, characterized in that, The bamboo bending creep testing device includes a buffer element, which is disposed between the clamp and the bamboo, and the buffer element is at least partially disposed within the clamping groove. 4.The bamboo bending creep resistance test device according to claim 1, characterized in that, The number of clamps is two, and the two clamps are respectively set at two third points along the extension direction of the bamboo. 5.The bamboo bending creep resistance test device according to claim 4, characterized in that, The gravity member extends along the extension direction of the bamboo material. There are two rings. The upper part of the two rings along the vertical direction is respectively fitted onto the corresponding clamps, and the lower part of the two rings along the vertical direction is respectively fitted onto the gravity member. 6.The bamboo bending creep resistance test device according to claim 1, characterized in that, The clamps at each force application point of the bamboo are arranged in pairs, and the pairs of clamps are symmetrically arranged on the outer periphery of the bamboo along the vertical direction.