Beam bending test teaching aid

Abstract

The utility model discloses a beam bending test teaching aid, and relates to the field of mechanics, the beam bending test teaching aid comprises at least one first teaching aid assembly and at least one second teaching aid assembly, the first teaching aid assembly and the second teaching aid assembly are fixedly connected in a clamping manner to form a beam model, and when pressure is applied to the beam model, the first teaching aid assembly and the second teaching aid assembly are connected in a clamping manner. The bending demonstrator is used for demonstrating the bending condition of the beam model after stress is applied to the beam model; through the design, the visual effect of stress is visually and vividly presented.

Description

Technical Field

[0001] This application relates to the field of mechanics, and in particular to a teaching tool for beam bending tests. Background Technology

[0002] Stress is invisible and intangible, but when it acts on an object, it can be observed through the overall or local deformation of the object. Currently, in school teaching, the explanation of this knowledge mainly relies on teachers drawing diagrams on the blackboard. However, this method is too cumbersome, rigid, and has a low reusability. Furthermore, the accuracy and vividness of the explanation heavily depend on the teacher's teaching level, making the presentation of mechanics too inflexible. Even though there are related teaching aids available, they can only demonstrate the deformation of individual beam models, failing to present the stress conditions of beam models with different cross-sectional shapes composed of multiple individual components in a more intuitive and vivid way. Therefore, mastering this knowledge point requires students to have strong comprehension and imaginative thinking abilities, thus limiting the improvement of teaching quality.

[0003] Therefore, developing a teaching tool that can represent the stresses experienced by beam models with different cross-sectional shapes is of great significance for teaching mechanics. Utility Model Content

[0004] The purpose of this application is to provide a teaching tool for beam bending tests that intuitively and vividly presents the visual effects of stress.

[0005] This application discloses a beam bending test apparatus, including at least one first apparatus component and at least one second apparatus component. The first apparatus component and the second apparatus component are fixedly connected by snap-fit ​​to form a beam model. When pressure is applied to the beam model, it is used to demonstrate the bending of the beam model under stress.

[0006] Optionally, both the first and second teaching aid components are made of elastic material. Both components have a cuboid structure. The first teaching aid component includes a first teaching aid body, a first protrusion, a second protrusion, a first groove, and a second groove. Along the length of the first teaching aid body, the body includes a first surface, a second surface, a third surface, and a fourth surface. The first and third surfaces are opposite to each other, as are the second and fourth surfaces. The first protrusion and the first groove are disposed on the first surface, and the second protrusion and the second groove are disposed on the second surface. The second teaching aid component includes a second teaching aid body, a third protrusion, a fourth protrusion, a third... The second teaching aid body includes a fifth surface, a sixth surface, a seventh surface, and an eighth surface. The third protrusion and the third groove are disposed on the fifth surface, and the fourth protrusion and the fourth groove are disposed on the sixth surface. The first protrusion engages with the third groove, and the third protrusion engages with the first groove; or the first protrusion engages with the fourth groove, and the fourth protrusion engages with the first groove; or the second protrusion engages with the third groove, and the third protrusion engages with the second groove; or the second protrusion engages with the fourth groove, and the fourth protrusion engages with the second groove.

[0007] Optionally, the first teaching component further includes a fifth protrusion, a sixth protrusion, a fifth groove, and a sixth groove, and the second teaching component further includes a seventh protrusion, an eighth protrusion, a seventh groove, and an eighth groove. The fifth protrusion and the fifth groove are disposed on the third surface, the sixth protrusion and the sixth groove are disposed on the fourth surface, the seventh protrusion and the seventh groove are disposed on the seventh surface, and the eighth protrusion and the eighth groove are disposed on the eighth surface.

[0008] Optionally, the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, and the eighth protrusion are all made of elastic material; there are multiple first protrusions, second protrusions, third protrusions, fourth protrusions, fifth protrusions, sixth protrusions, seventh protrusions, and eighth protrusions, which are spaced apart; the number of first grooves matches the number of first protrusions, the number of second grooves matches the number of second protrusions, the number of third grooves matches the number of third protrusions, the number of fourth grooves matches the number of fourth protrusions, the number of fifth grooves matches the number of fifth protrusions, the number of sixth grooves matches the number of sixth protrusions, the number of seventh grooves matches the number of seventh protrusions, and the number of eighth grooves matches the number of eighth protrusions.

[0009] Optionally, the cross-sections of the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, the eighth protrusion, the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove, the seventh groove, and the eighth groove are all inverted trapezoidal structures and have the same shape and size; or the cross-sections of the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, the eighth protrusion, the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove, the seventh groove, and the eighth groove are all circular structures and have the same shape and size.

[0010] Optionally, the cross-section of either the first or second teaching aid body is a square structure. The square structure of the first teaching aid body includes a first side, a second side, a third side, and a fourth side. The first side and the third side are opposite to each other, and the second side and the fourth side are opposite to each other. The first groove is disposed on the first side, the second groove is disposed on the second side, the fifth groove is disposed on the third side, and the sixth groove is disposed on the fourth side. The lengths of the first, second, third, and fourth sides are all b1. The distance from the central axis of the first groove to the fourth side is b1 / 4, the distance from the central axis of the second groove to the first side is b1 / 4, the distance from the central axis of the fifth groove to the fourth side is b1 / 4, and the distance from the central axis of the sixth groove to the fourth side is b1 / 4. The distance between the third sides is b1 / 4; the square structure of the second teaching aid body includes a fifth side, a sixth side, a seventh side, and an eighth side. The fifth side and the seventh side are arranged opposite each other, and the sixth side and the eighth side are arranged opposite each other. The third groove is arranged on the fifth side, the fourth groove is arranged on the sixth side, the seventh groove is arranged on the seventh side, and the eighth groove is arranged on the eighth side. Let the length of the fifth side, the sixth side, the seventh side, and the eighth side all be b2. The distance between the central axis of the third groove and the eighth side is b2 / 4, the distance between the central axis of the fourth groove on the sixth side and the fifth side is b2 / 4, the distance between the central axis of the seventh groove and the sixth side is b2 / 4, and the distance between the central axis of the eighth groove and the seventh side is b2 / 4.

[0011] Optionally, the cross-sections of the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, and the eighth protrusion are all circular. Each of the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, and the eighth protrusion includes a first material portion and a second material portion. The cross-section of the first material portion is rectangular, and the cross-section of the second material portion is arc-shaped. The second material portion is fitted onto the outer surface of the first material portion. The elasticity of the material of the second material portion is greater than that of the material of the first material portion.

[0012] Optionally, the cross-sections of the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove, the seventh groove, and the eighth groove are all circular. The width of the opening of the first groove is smaller than the diameter of the first groove; the width of the opening of the second groove is smaller than the diameter of the second groove; the width of the opening of the third groove is smaller than the diameter of the third groove; the width of the opening of the fourth groove is smaller than the diameter of the fourth groove; the width of the opening of the fifth groove is smaller than the diameter of the fifth groove; the width of the opening of the sixth groove is smaller than the diameter of the sixth groove; the width of the opening of the seventh groove is smaller than the diameter of the seventh groove; and the width of the opening of the eighth groove is smaller than the diameter of the eighth groove.

[0013] Optionally, a plurality of first protrusions are misaligned with a plurality of first grooves, a plurality of second protrusions are misaligned with a plurality of second grooves, a plurality of third protrusions are misaligned with a plurality of third grooves, a plurality of fourth protrusions are misaligned with a plurality of fourth grooves, a plurality of fifth protrusions are misaligned with a plurality of fifth grooves, a plurality of sixth protrusions are misaligned with a plurality of sixth grooves, a plurality of seventh protrusions are misaligned with a plurality of seventh grooves, and a plurality of eighth protrusions are misaligned with a plurality of eighth grooves.

[0014] Optionally, both the first teaching aid component and the second teaching aid component are cube structures.

[0015] Compared to existing technologies that can only illustrate the effects of force acting on objects with different cross-sectional shapes by drawing diagrams on a blackboard, the beam bending test teaching aid of this application includes at least one first teaching aid component and at least one second teaching aid component. The first teaching aid component and the second teaching aid component are connected by snap-fit ​​to form a beam model. When pressure is applied to the beam model, it is used to demonstrate the bending of the beam model after being subjected to stress. In this way, the visual effect of stress acting on objects with different cross-sectional shapes can be presented more intuitively and vividly through the cooperation of multiple teaching aid components. Attached Figure Description

[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the beam bending test teaching tool provided in the first embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the overall structure of the first teaching aid component and the second teaching aid component provided in the first embodiment of this application;

[0019] Figure 3 This is a cross-sectional structural diagram of the first teaching aid component and the second teaching aid component provided in the first embodiment of this application;

[0020] Figure 4 This is a structural schematic diagram of the beam bending test teaching tool in the first combined state provided in the first embodiment of this application;

[0021] Figure 5 This is a structural schematic diagram of the beam bending test teaching tool in the second combined state provided in the first embodiment of this application;

[0022] Figure 6 This is a structural schematic diagram of the beam bending test teaching tool in the third combined state provided in the first embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the overall structure of the first and second teaching aid components provided in the second embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the cross-sectional structure of the first and second teaching aid components provided in the second embodiment of this application;

[0025] Figure 9 This is a cross-sectional structural diagram of the first or second teaching aid component provided in the third embodiment of this application.

[0026] Among them, 10. Beam bending test teaching aid; 100. First teaching aid component; 110. First teaching aid body; 120. First protrusion; 121. Second protrusion; 122. First groove; 123. Second groove; 124. Fifth protrusion; 125. Fifth groove; 126. Sixth protrusion; 127. Sixth groove; 130. First surface; 140. Second surface; 150. Third surface; 160. Fourth surface; 170. First side; 180. Second side; 190. Third side; 200. Fourth side; 300. 310. Second teaching aid component; 320. Second teaching aid body; 321. Third protrusion; 322. Fourth protrusion; 323. Third groove; 324. Seventh protrusion; 325. Seventh groove; 326. Eighth protrusion; 327. Eighth groove; 330. Fifth surface; 340. Sixth surface; 350. Seventh surface; 360. Eighth surface; 370. Fifth side; 380. Sixth side; 390. Seventh side; 400. Eighth side; 500. First material part; 520. Second material part. Detailed Implementation

[0027] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0028] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Furthermore, terms indicating orientation or positional relationships such as "upper," "lower," "left," "right," "second direction," and "first direction" are described based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this application, not indicating 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 application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0030] First embodiment:

[0031] Figure 1 This is a schematic diagram of the overall structure of the beam bending test teaching apparatus provided in the first embodiment of this application, as shown below. Figure 1As shown, this application discloses a beam bending test teaching tool 10, including at least one first teaching tool component 100 and at least one second teaching tool component 300. The first teaching tool component 100 and the second teaching tool component 300 are fixedly connected by snap-fit ​​to form a beam model. When pressure is applied to the beam model, it is used to demonstrate the bending condition of the beam model after being subjected to stress.

[0032] Compared to existing technologies that can only illustrate the effects of force acting on objects with different cross-sectional shapes by drawing diagrams on a blackboard, the beam bending test teaching aid of this application includes at least one first teaching aid component 100 and at least one second teaching aid component 300. The first teaching aid component 100 and the second teaching aid component 300 are connected by snap-fit ​​to form a beam model. When pressure is applied to the beam model, it is used to demonstrate the bending of the beam model after being subjected to stress. In this way, the visual effect of stress acting on objects with different cross-sectional shapes can be presented more intuitively and vividly through the cooperation of multiple teaching aid components.

[0033] Both the first teaching aid component 100 and the second teaching aid component 300 are made of elastic materials. Figure 2 This is a schematic diagram of the overall structure of the first and second teaching aid components provided in the first embodiment of this application, as shown below. Figure 2 As shown, both the first teaching aid component 100 and the second teaching aid component 300 have a cuboid structure. The first teaching aid component 100 includes a first teaching aid body 110, a first protrusion 120, a second protrusion 121, a first groove 122, and a second groove 123. Along the length of the first teaching aid body 110, the first teaching aid body 110 includes a first surface 130, a second surface 140, a third surface 150, and a fourth surface 160. The first surface 130 and the third surface 150 are arranged opposite to each other, and the second surface 140 and the fourth surface 160 are arranged opposite to each other. The first protrusion 120 and the first groove 122 are disposed on the first surface 130, and the second protrusion 121 and the second groove 123 are disposed on the second surface 140.

[0034] The second teaching aid assembly 300 includes a second teaching aid body 310, a third protrusion 320, a fourth protrusion 321, a third groove 322, and a fourth groove 323. Along the length of the second teaching aid body 310, the second teaching aid body 310 includes a fifth surface 330, a sixth surface 340, a seventh surface 350, and an eighth surface 360. The third protrusion 320 and the third groove 322 are disposed on the fifth surface 330, and the fourth protrusion 321 and the fourth groove 323 are disposed on the sixth surface 340. The first protrusion 120 can be engaged with the third groove 322, and the third protrusion 322 can be engaged with the first groove 122.

[0035] The simplest beam bending test apparatus can be formed by engaging and connecting the first teaching aid component 100 and the second teaching aid component 300. Alternatively, the first protrusion 120 can engage with the fourth groove 323, and the fourth protrusion 321 can engage with the first groove 122; or the second protrusion 121 can engage with the third groove 322, and the third protrusion 320 can engage with the second groove 123; or the second protrusion 121 can engage with the fourth groove 323, and the fourth protrusion 321 can engage with the second groove 123. All these configurations facilitate assembly and operation. Of course, it is also possible to provide protrusions and grooves of different shapes on the corresponding surfaces of the first teaching aid body 110 or the second teaching aid body 310, requiring matching before assembly; this is not a limitation here.

[0036] In addition, protrusions and grooves can also be provided on other surfaces of the first teaching aid component 100 and the second teaching aid component 300, so that multiple teaching aid components can be combined to form beam models with different cross-sections, which can be used for stress testing teaching of beam models with different cross-sections.

[0037] The action and reaction forces between the first teaching aid component 100 and the second teaching aid component 300 are less than or equal to the applied pressure. During the teaching demonstration, the applied pressure will not cause the beam model formed by the combination to be destroyed, that is, the beam model can be kept in the elastic stage, and the buckle will not be destroyed under the action of this pressure.

[0038] Specifically, Figure 3 This is a cross-sectional structural diagram of the first and second teaching aid components provided in the first embodiment of this application, combined with... Figures 2-3It is understood that the first teaching aid component 100 further includes a fifth protrusion 124, a sixth protrusion 126, a fifth groove 125, and a sixth groove 127, and the second teaching aid component 300 further includes a seventh protrusion 324, an eighth protrusion 326, a seventh groove 325, and an eighth groove 327. The fifth protrusion 124 and the fifth groove 125 are disposed on the third surface 150, the sixth protrusion 126 and the sixth groove 127 are disposed on the fourth surface 160, the seventh protrusion 324 and the seventh groove 325 are disposed on the seventh surface 350, and the eighth protrusion 326 and the eighth groove 327 are disposed on the eighth surface 360. In this way, protrusions and grooves are provided on all four sides of the first teaching aid component 100 and the second teaching aid component 300. Multiple first teaching aid components 100 and multiple second teaching aid components 300 can be snapped together from different surfaces to form more beam models with different cross-sections. This allows for a more comprehensive demonstration in teaching experiments on beam bending stress, making the teaching easier to understand.

[0039] Combination Figures 4-6 The beam models formed by combining multiple first teaching aid components 100 and multiple second teaching aid components 300 are diverse, including "I" shape, "I" shape, and "L" shape. The cross-sectional structures of the beam models with these shapes are all different. The arrows in the figure indicate the vertical pressure applied to the beam model. In this way, beam bending tests can be demonstrated in the classroom using beam models with different cross-sectional structures, making the classroom explanation more intuitive and easy to understand.

[0040] Furthermore, by adopting a cuboid structure, when multiple first teaching aid components 100 and multiple second teaching aid components 300 are combined, the number of first teaching aid components 100 and second teaching aid components 300 can be relatively small, allowing for the formation of a larger-area beam model for beam bending test teaching aids, thus saving assembly time. Of course, it is also possible for both the first teaching aid component 100 and the second teaching aid component 300 to be cubic structures. When the required beam bending test teaching aid is small, it is convenient to assemble using cubic first teaching aid components 100 and second teaching aid components 300. In addition, the first teaching aid components 100 and second teaching aid components 300 can also adopt other shapes and structures, depending on the needs of the experimental demonstration, and are not limited here.

[0041] To facilitate assembly, the first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, and the eighth protrusion 326 are all made of elastic material, which can produce a certain deformation when they are engaged, making the engagement and assembly easier.

[0042] Moreover, combined Figure 2 The first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, and the eighth protrusion 326 are all multiple and spaced apart. The number of the first groove 122 matches the number of the first protrusion 120, the number of the second groove 123 matches the number of the second protrusion 121, the number of the third groove 322 matches the number of the third protrusion 320, the number of the fourth groove 323 matches the number of the fourth protrusion 321, the number of the fifth groove 125 matches the number of the fifth protrusion 124, the number of the sixth groove 127 matches the number of the sixth protrusion 126, the number of the seventh groove 325 matches the number of the seventh protrusion 324, and the number of the eighth groove 327 matches the number of the eighth protrusion 326. When the first teaching aid component 100 and the second teaching aid component 300 are snapped together, for example, multiple first protrusions 120 on the first surface 130 of the first teaching aid component 100 engage with multiple third grooves 322 on the fifth surface 330 of the second teaching aid component 300, and multiple first grooves 122 on the first surface 130 of the first teaching aid component 100 engage with multiple third protrusions 320 on the fifth surface 330 of the second teaching aid component 300, the connection is stable and uniform, and is not easy to fall off.

[0043] Taking the first protrusion 120 and the first groove 122 as examples, the multiple first protrusions 120 can be arranged side by side with intervals, and the multiple first grooves 122 can also be arranged side by side with intervals. Of course, the multiple first protrusions 120 and the multiple first grooves 122 can also be staggered, which can further ensure the stability of the engaging surface. The positions of the second protrusion 121 and the second groove 123, the third protrusion 320 and the third groove 322, the fourth protrusion 321 and the fourth groove 323, the fifth protrusion 124 and the fifth groove 125, the sixth protrusion 126 and the sixth groove 127, the seventh protrusion 324 and the seventh groove 325, and the eighth protrusion 326 and the eighth groove 327 can all be arranged side by side with intervals or staggered. The specific design should be selected according to the actual situation, and no limitation is made here.

[0044] like Figure 3As shown, the cross-sections of the first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, the eighth protrusion 326, the first groove 122, the second groove 123, the third groove 322, the fourth groove 323, the fifth groove 125, the sixth groove 127, the seventh groove 325, and the eighth groove 327 are all inverted trapezoidal structures, and they are all the same size and shape. That is, any protrusion structure can be matched and engaged with any groove structure. Moreover, the inverted trapezoidal structure is wider at the top and narrower at the bottom. That is, the opening of the first groove 122 is smaller than the width of the end of the third protrusion 320 structure that is away from the second teaching aid body 310. In this way, after the third protrusion 320 is engaged in the first groove 122, it is not easy to fall off. Similarly, the cooperation between the other protrusion structures and the groove structures is based on the same principle, which will not be elaborated here.

[0045] The cross-section of either the first teaching aid body 110 or the second teaching aid body 310 is a square structure. The square structure of the first teaching aid body 110 includes a first side 170, a second side 180, a third side 190, and a fourth side 200. The first side 170 and the third side 190 are opposite to each other, and the second side 180 and the fourth side 200 are opposite to each other. The first groove 122 is disposed on the first side 170, the second groove 123 is disposed on the second side 180, the fifth groove 125 is disposed on the third side 190, and the sixth groove 127 is disposed on the third side 190. In the fourth side 200, the dashed line in the figure represents the central axis of each groove. Let the length of the first side 170, the second side 180, the third side 190, and the fourth side 200 all be b1. The distance between the central axis of the first groove 122 and the fourth side 200 is b1 / 4. The distance between the central axis of the second groove 123 and the first side 170 is b1 / 4. The distance between the central axis of the fifth groove 125 and the fourth side 200 is b1 / 4. The distance between the central axis of the sixth groove 127 and the third side 190 is b1 / 4.

[0046] The second teaching aid body 310 has a square structure including a fifth side 370, a sixth side 380, a seventh side 390, and an eighth side 400. The fifth side 370 and the seventh side 390 are opposite each other, and the sixth side 380 and the eighth side 400 are opposite each other. The third groove 322 is located on the fifth side 370, the fourth groove 323 is located on the sixth side 380, the seventh groove 325 is located on the seventh side 390, and the eighth groove 327 is located on the eighth side 400. The fifth side 370 and the sixth side 380... The lengths of the seventh side 390 and the eighth side 400 are both b2. The distance between the central axis of the third groove 322 and the eighth side 400 is b2 / 4. The distance between the central axis of the fourth groove 323 of the sixth side 380 and the fifth side 370 is b2 / 4. The distance between the central axis of the seventh groove 325 and the sixth side 380 is b2 / 4. The distance between the central axis of the eighth groove 327 and the seventh side 390 is b2 / 4. Where b1 = b2, the beam model formed by this combination is more uniform and aesthetically pleasing.

[0047] Second embodiment:

[0048] Figure 7 This is a schematic diagram of the overall structure of the first and second teaching aid components provided in the second embodiment of this application. Figure 8 This is a schematic diagram of the cross-sectional structure of the first and second teaching aid components provided in the second embodiment of this application, as shown below. Figures 7-8 As shown, in this second embodiment of the present application, the difference between this embodiment and the first embodiment is that the cross-sections of the first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, the eighth protrusion 326, the first groove 122, the second groove 123, the third groove 322, the fourth groove 323, the fifth groove 125, the sixth groove 127, the seventh groove 325, and the eighth groove 327 are all circular structures, and they are all the same in shape and size. This circular structure with its curved edges can reduce the friction during engagement, allowing for faster assembly.

[0049] Specifically, the width of the opening of the first groove 122 is smaller than the diameter of the first groove 122; the width of the opening of the second groove 123 is smaller than the diameter of the second groove 123; the width of the opening of the third groove 322 is smaller than the diameter of the third groove 322; the width of the opening of the fourth groove 323 is smaller than the diameter of the fourth groove 323; the width of the opening of the fifth groove 125 is smaller than the diameter of the fifth groove 125; the width of the opening of the sixth groove 127 is smaller than the diameter of the sixth groove 127; the width of the opening of the seventh groove 325 is smaller than the diameter of the seventh groove 325; and the width of the opening of the eighth groove 327 is smaller than the diameter of the eighth groove 327. This smaller opening size increases the resistance to detachment, making it less likely for the first teaching aid component 100 and the second teaching aid component 300 to detach after assembly.

[0050] Furthermore, the distance h from the center of the first groove 122 to the first side 170, the distance from the center of the second groove 123 to the third side 190, the distance from the center of the fifth groove 125 to the second side 180, and the distance h from the center of the sixth groove 127 to the fourth side 200 are all b1 / 50.

[0051] The distance h from the center of the third groove 322 to the fifth side 370, the distance from the center of the fourth groove 323 to the sixth side 380, the distance from the center of the seventh groove 325 to the seventh side 390, and the distance h from the center of the eighth groove 327 to the eighth side 400 are all b2 / 50.

[0052] In addition, the diameters of the first groove 122, the second groove 123, the fifth groove 125, and the sixth groove 127 are all b1 / 10; the diameters of the third groove 322, the fourth groove 323, the seventh groove 325, and the eighth groove 327 are all b2 / 10, and the shapes and sizes of the first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, and the eighth protrusion 326 are all matched with the size of the corresponding groove structure.

[0053] Through experiments, the inventors discovered that the groove structure and protrusion structure described above, when used in the aforementioned proportions, are easy to assemble and also provide a good fixing effect.

[0054] Of course, the cross-sections of the first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, the eighth protrusion 326, the first groove 122, the second groove 123, the third groove 322, the fourth groove 323, the fifth groove 125, the sixth groove 127, the seventh groove 325, and the eighth groove 327 can also be of other shapes and structures, as long as they are easy to snap on and the snaps are not easy to fall off after assembly. The specific design depends on the application and is not limited here.

[0055] Third embodiment:

[0056] Figure 9 This is a cross-sectional structural diagram of the first or second teaching aid component provided in the third embodiment of this application, as shown below. Figure 9 As shown, as a third embodiment of this application, this embodiment differs from the first and second embodiments in that the cross-sections of the first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, and the eighth protrusion 326 are all circular. Each of the first protrusion 120, the second protrusion 121, the third protrusion 320, the fourth protrusion 321, the fifth protrusion 124, the sixth protrusion 126, the seventh protrusion 324, and the eighth protrusion 326 includes a first material portion 500 and a second material portion 520. The cross-section of the first material portion 500 is rectangular, and the cross-section of the second material portion 520 is arc-shaped. The second material portion 520 is fitted onto the outer surface of the first material portion 500. The elasticity of the material of the second material portion 520 is greater than the elasticity of the material of the first material portion 500.

[0057] On the one hand, this design allows for easier deformation and engagement during assembly due to the relatively high elasticity of the second material part 520. On the other hand, the stiffer first material part 500 helps prevent the beam model from falling off when stress is applied.

[0058] Taking the engagement structure of the first protrusion 120 and the third groove 322 as an example, when the applied stress is applied to the engagement structure, since the stress is applied vertically from top to bottom to the beam model, the first protrusion 120 moves downward under the stress, the second material part 520 with greater elasticity undergoes appropriate deformation, while the deformation of the first material part 500 is relatively small, and the end can be driven by the deformation of the first material part 500 to lock the groove wall of the third groove 322 upward, forming a certain resistance with the applied stress to prevent it from falling off.

[0059] It should be noted that the utility model concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0060] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A teaching tool for beam bending tests, characterized in that, It includes at least one first teaching aid component and at least one second teaching aid component, which are fixedly connected by snap-fit ​​to form a beam model. When pressure is applied to the beam model, it is used to demonstrate the bending of the beam model under stress. Both the first and second teaching aid components are made of elastic material and have a cuboid structure. The first teaching aid component includes a first teaching aid body, a first protrusion, a second protrusion, a first groove, and a second groove. Along the length of the first teaching aid body, the first teaching aid body includes a first surface, a second surface, a third surface, and a fourth surface. The first surface and the third surface are arranged opposite to each other, and the second surface and the fourth surface are arranged opposite to each other. The first protrusion and the first groove are arranged on the first surface, and the second protrusion and the second groove are arranged on the second surface. The second teaching aid assembly includes a second teaching aid body, a third protrusion, a fourth protrusion, a third groove, and a fourth groove. Along the length of the second teaching aid body, the second teaching aid body includes a fifth surface, a sixth surface, a seventh surface, and an eighth surface. The third protrusion and the third groove are disposed on the fifth surface, and the fourth protrusion and the fourth groove are disposed on the sixth surface. Wherein, the first protrusion engages with the third groove, and the third protrusion engages with the first groove; or The first protrusion engages with the fourth groove, and the fourth protrusion engages with the first groove; or The second protrusion engages with the third groove, and the third protrusion engages with the second groove; or The second protrusion engages with the fourth groove, and the fourth protrusion engages with the second groove.

2. The beam bending test teaching tool according to claim 1, characterized in that, The first teaching aid component further includes a fifth protrusion, a sixth protrusion, a fifth groove, and a sixth groove; the second teaching aid component further includes a seventh protrusion, an eighth protrusion, a seventh groove, and an eighth groove; the fifth protrusion and the fifth groove are disposed on the third surface; the sixth protrusion and the sixth groove are disposed on the fourth surface; the seventh protrusion and the seventh groove are disposed on the seventh surface; and the eighth protrusion and the eighth groove are disposed on the eighth surface.

3. The beam bending test teaching tool according to claim 2, characterized in that, The first, second, third, fourth, fifth, sixth, seventh, and eighth protrusions are all made of elastic material. There are multiple protrusions arranged at intervals. The number of first grooves matches the number of first protrusions, the number of second grooves matches the number of second protrusions, the number of third grooves matches the number of third protrusions, the number of fourth grooves matches the number of fourth protrusions, the number of fifth grooves matches the number of fifth protrusions, the number of sixth grooves matches the number of sixth protrusions, the number of seventh grooves matches the number of seventh protrusions, and the number of eighth grooves matches the number of eighth protrusions.

4. The beam bending test teaching tool according to claim 3, characterized in that, The first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, the eighth protrusion, the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove, the seventh groove, and the eighth groove all have inverted trapezoidal cross-sections and are the same in shape and size; or The first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, the eighth protrusion, the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove, the seventh groove, and the eighth groove all have a circular cross-section and are the same in shape and size.

5. The beam bending test teaching tool according to claim 4, characterized in that, The cross-section of either the first or second teaching aid body is a square structure. The square structure of the first teaching aid body includes a first side, a second side, a third side, and a fourth side. The first side and the third side are arranged opposite each other, and the second side and the fourth side are arranged opposite each other. The first groove is arranged on the first side, the second groove is arranged on the second side, the fifth groove is arranged on the third side, and the sixth groove is arranged on the fourth side. The lengths of the first side, the second side, the third side, and the fourth side are all b1. The distance between the central axis of the first groove and the fourth side is b1 / 4, the distance between the central axis of the second groove and the first side is b1 / 4, the distance between the central axis of the fifth groove and the fourth side is b1 / 4, and the distance between the central axis of the sixth groove and the third side is b1 / 4. The square structure of the second teaching aid body includes a fifth side, a sixth side, a seventh side, and an eighth side. The fifth side and the seventh side are arranged opposite each other, and the sixth side and the eighth side are arranged opposite each other. The third groove is arranged on the fifth side, the fourth groove is arranged on the sixth side, the seventh groove is arranged on the seventh side, and the eighth groove is arranged on the eighth side. Let the length of the fifth side, the sixth side, the seventh side, and the eighth side all be b2. The distance between the central axis of the third groove and the eighth side is b2 / 4. The distance between the central axis of the fourth groove on the sixth side and the fifth side is b2 / 4. The distance between the central axis of the seventh groove and the sixth side is b2 / 4. The distance between the central axis of the eighth groove and the seventh side is b2 / 4.

6. The beam bending test teaching tool according to claim 4, characterized in that, The first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, and the eighth protrusion all have circular cross-sections. Each of the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, and the eighth protrusion includes a first material portion and a second material portion. The first material portion has a rectangular cross-section, and the second material portion has an arc-shaped cross-section. The second material portion is fitted onto the outer surface of the first material portion. The elasticity of the material in the second material part is greater than that of the material in the first material part.

7. The beam bending test teaching tool according to claim 4, characterized in that, The first, second, third, fourth, fifth, sixth, seventh, and eighth grooves all have circular cross-sections. The width of the opening of the first groove is smaller than the diameter of the first groove; the width of the opening of the second groove is smaller than the diameter of the second groove; the width of the opening of the third groove is smaller than the diameter of the third groove; the width of the opening of the fourth groove is smaller than the diameter of the fourth groove; the width of the opening of the fifth groove is smaller than the diameter of the fifth groove; the width of the opening of the sixth groove is smaller than the diameter of the sixth groove; the width of the opening of the seventh groove is smaller than the diameter of the seventh groove; and the width of the opening of the eighth groove is smaller than the diameter of the eighth groove.

8. The beam bending test teaching tool as described in claim 3, characterized in that, Multiple first protrusions are misaligned with multiple first grooves, multiple second protrusions are misaligned with multiple second grooves, multiple third protrusions are misaligned with multiple third grooves, multiple fourth protrusions are misaligned with multiple fourth grooves, multiple fifth protrusions are misaligned with multiple fifth grooves, multiple sixth protrusions are misaligned with multiple sixth grooves, multiple seventh protrusions are misaligned with multiple seventh grooves, and multiple eighth protrusions are misaligned with multiple eighth grooves.

9. The beam bending test teaching tool as described in claim 1, characterized in that, Both the first teaching aid component and the second teaching aid component are cubic structures.

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