Torsion mechanics teaching aid

Abstract

The utility model discloses a torsional mechanics teaching aid, concretely relates to mechanics teaching aid technical field, including cylindrical base, the cylindrical base top is equipped with symmetrical fan -shaped turntable, the symmetrical fan -shaped turntable is connected with cylindrical base through the baffle, the symmetrical fan -shaped turntable two sides outer wall all are fixed with a plurality of equidistance distribution's first hook, the cylindrical base two sides outer wall all are fixed with a plurality of corresponding second hook with first hook, the first hook is connected with second hook through the elastic rope between, makes symmetrical fan -shaped turntable and cylindrical base form closed force system. The utility model discloses through cylindrical base, symmetrical fan -shaped turntable, arc -shaped recess, first hook, second hook and elastic rope cooperation, arc -shaped recess depth change intuitive display shear stress linear distribution with radius, modular design supports to replace elastic rope material or size, is convenient for extension experiment, simple structure, and the production cost is low, is suitable for teaching scene batch use.

Description

Technical Field

[0001] This utility model relates to the field of mechanical teaching aids, and more specifically to torsional mechanical teaching aids. Background Technology

[0002] Torsional mechanics is a field of materials mechanics that studies objects under torsional stress. For example, in various mechanical devices in mechanical transmissions, such as automobile driveshafts and gear transmission systems in industrial production, the principles of torsional mechanics are widely used in the design and analysis of transmission components to ensure their safe and reliable operation during torque transmission, avoiding damage or excessive deformation due to excessive torsional stress. In materials performance testing, torsional tests can be conducted to determine mechanical properties such as shear strength and shear modulus. These properties are of great significance for material selection and engineering structure design.

[0003] During torsion, shear stress is generated within an object. This stress arises from the relative displacement between adjacent cross-sections. The direction of the shear stress is tangential to the cross-section, and its magnitude depends on the torque and the geometric properties of the cross-section. Traditional teaching often relies on theoretical derivations or two-dimensional diagrams, making it difficult to visually demonstrate the dynamic deformation and stress distribution during torsion. With ongoing research, teaching aids for torsion mechanics have been designed to help students understand torsion.

[0004] For example, in an integrated multifunctional materials mechanics teaching tool with prior art publication number CN212276652U, the axial loading assembly of this utility model prevents the two supports from moving or overturning due to their large slenderness ratio during the loading process, thus ensuring that the horizontal axial force is evenly applied to both ends of the two supports. In other words, this utility model enables the horizontal load to be evenly applied to the two supports, making the axial force loading process easier; and utilizing pure mechanical principles, all components of this utility model are connected by hinges or bolts, ensuring stability while emphasizing economy and energy efficiency.

[0005] Another type of material torsion testing machine uses clamps to hold samples such as metal wires and rods, measures the applied torque using a torque sensor, records the torsion angle using an angle encoder, and then outputs a torque-angle curve through software. However, this structure is complex and expensive, making it impractical for schools to equip on a large scale. Furthermore, simultaneously controlling torque loading, data recording, and software operation is difficult for beginners. Therefore, there is an urgent need for a teaching tool that is simple in structure, easy to operate, and inexpensive to enhance teaching effectiveness. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, this utility model provides a torsional mechanics teaching tool to solve the problems of complex structure, high cost and single function of the existing teaching tool. It can intuitively help students understand the principles of mechanics and improve learning efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a torsional mechanics teaching aid, comprising a cylindrical base, a symmetrical fan-shaped turntable at the top of the cylindrical base, the symmetrical fan-shaped turntable being connected to the cylindrical base via a cover, multiple equally spaced first hooks fixedly provided on the outer walls of both the front and rear sides of the symmetrical fan-shaped turntable, and multiple second hooks corresponding to the first hooks fixedly provided on the outer walls of both the front and rear sides of the cylindrical base, the first hooks and the second hooks being connected by a spring rope, so that the symmetrical fan-shaped turntable and the cylindrical base form a closed force system, the top of the cylindrical base having two sets of symmetrically distributed arc-shaped grooves, each set having multiple arc-shaped grooves, one of which has a limit baffle inserted inside, the limit baffle being used to limit movement on one side of the symmetrical fan-shaped turntable.

[0008] In a preferred embodiment, a central hole is provided at the center of the top of the symmetrical fan-shaped turntable, and a positioning rod adapted to the central hole is integrally formed at the center of the top of the cylindrical base. The positioning rod passes through the central hole and extends above the central hole. By setting the positioning rod, the connection between the symmetrical fan-shaped turntable and the cylindrical base can be completed quickly, thereby improving assembly efficiency.

[0009] In a preferred embodiment, the top of the positioning rod is provided with a threaded hole, and the cover is threadedly connected to the threaded hole. The cover has a diameter of 16mm and is installed by means of threaded connection. The cover can limit the symmetrical fan-shaped turntable, thereby improving the stability of the symmetrical fan-shaped turntable.

[0010] In a preferred embodiment, multiple arc-shaped grooves are arranged in a linear array on the top of the cylindrical base, and the depth of each arc-shaped groove increases linearly along the radius. The multiple uniformly distributed arc-shaped grooves make it convenient for teachers and students to quickly view the changes in shear stress.

[0011] In a preferred embodiment, both the cylindrical base and the symmetrical fan-shaped turntable are made of ABS plastic, and the elastic cord is made of rubber or nylon. Both are elastic and can change with the rotation of the symmetrical fan-shaped turntable, thus facilitating observation by teachers and students.

[0012] In a preferred embodiment, the cylindrical base has a height of 140 mm and a diameter of 100 mm.

[0013] In a preferred embodiment, the symmetrical sector-shaped turntable has a diameter of 100 mm, a thickness of 10 mm, a sector angle of 90°, and a central hole diameter of 9 mm.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This utility model uses a cylindrical base, a symmetrical fan-shaped turntable, an arc-shaped groove, a first hook, a second hook, and an elastic cord in combination. The change in the depth of the arc-shaped groove intuitively shows the linear distribution of shear stress with the radius. The modular design allows for the replacement of elastic cord materials or sizes, which is convenient for expanding experiments. The structure is simple, the manufacturing cost is low, and it is suitable for mass use in teaching scenarios. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cylindrical base of this utility model;

[0019] Figure 3 This is a side view of the symmetrical sector-shaped turntable of this utility model;

[0020] Figure 4 This is a schematic diagram of the cover of this utility model;

[0021] Figure 5 This is a schematic diagram of the symmetrical sector turntable of this utility model after rotation.

[0022] The attached diagram is labeled as follows: 1. Cylindrical base; 2. Symmetrical fan-shaped turntable; 3. Cover; 4. First hook; 5. Second hook; 6. Spring rope; 7. Arc-shaped groove; 8. Limiting baffle; 9. Center hole; 10. Positioning rod; 11. Threaded hole. Detailed Implementation

[0023] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Refer to the instruction manual appendix Figures 1-5 This utility model provides a torsional mechanics teaching tool, including a cylindrical base 1 with a height of 140mm and a diameter of 100mm. The top of the cylindrical base 1 is provided with a symmetrical fan-shaped turntable 2, which is connected to the cylindrical base 1 through a cover 3. The symmetrical fan-shaped turntable 2 has a symmetrical fan-shaped structure with a radius of 50mm, a thickness of 10mm, and a fan angle of 90°. Both the cylindrical base 1 and the symmetrical fan-shaped turntable 2 are made of ABS plastic and are formed by 3D printing or machining. ABS plastic has high strength, hardness, and impact resistance, and can maintain stable mechanical properties under different environmental conditions. It is not easy to break or deform, thereby improving the strength and lifespan of the cylindrical base 1 and the symmetrical fan-shaped turntable 2.

[0025] Multiple first hooks 4 are fixedly provided on the outer walls of the front and rear sides of the symmetrical fan-shaped turntable 2, and multiple second hooks 5 corresponding to the first hooks 4 are fixedly provided on the outer walls of the front and rear sides of the cylindrical base 1. The first hooks 4 and the second hooks 5 are connected by elastic ropes 6, so that the symmetrical fan-shaped turntable 2 and the cylindrical base 1 form a closed force system. The elastic ropes 6 are rubber ropes or loosely woven or twisted nylon ropes. Both are soft and can stretch and deform to a certain extent when stretched, so that they can change with the rotation of the symmetrical fan-shaped turntable 2, which makes it easier for teachers and students to observe.

[0026] To facilitate teachers and students in deriving the shear stress distribution law, two sets of symmetrically distributed arc-shaped grooves 7 are provided on the top of the cylindrical base 1. Each set contains multiple arc-shaped grooves 7, which are arranged in a linear array on the top of the cylindrical base 1. The depth of the multiple arc-shaped grooves 7 increases linearly along the radius, and the two arc-shaped grooves 7 closest to the center of the cylindrical base 1 can have a depth of 5mm. A limiting baffle 8 is inserted inside one of the arc-shaped grooves 7, which can play a limiting role on one side of the symmetrical fan-shaped turntable 2.

[0027] To facilitate rapid assembly, a central hole 9 with a diameter of 9mm is provided at the center of the top of the symmetrical fan-shaped turntable 2. A positioning rod 10 adapted to the central hole 9 is integrally formed at the center of the top of the cylindrical base 1. The positioning rod 10 passes through the central hole 9 and extends above the central hole 9. A threaded hole 11 is provided at the top of the positioning rod 10. The cover 3 is threadedly connected to the threaded hole 11. The cover 3 with a diameter of 16mm is connected to the threaded hole 11.

[0028] In use, first align the center hole 9 on the symmetrical sector-shaped turntable 2 with the positioning rod 10 and insert it. Then, screw the cover 3 into the threaded hole 11 to fix the symmetrical sector-shaped turntable 2. After fixing the symmetrical sector-shaped turntable 2, connect the spring ropes 6 between the first hook 4 and the second hook 5, which correspond one-to-one. Then, rotate the symmetrical sector-shaped turntable 2 to the set angle. At this time, multiple spring ropes 6 are stretched. By observing the exposure degree of the arc-shaped groove 7 and the change in the depth of the arc-shaped groove 7, the shear stress distribution law can be deduced. When the torsional torque increases, the overall shear stress increases, and the exposure degree of the arc-shaped groove 7 becomes more significant, thus demonstrating the direct proportional relationship between torque and shear stress. This teaching aid has a simple structure and can record the relationship between the torsion angle and the restoring torque by changing the spring ropes 6 with different stiffnesses, allowing for extended experiments. At the same time, the entire material of the teaching aid can be replaced, making it suitable for physics teaching scenarios.

[0029] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A torsion mechanics teaching aid, characterized in that: It includes a cylindrical base (1), the top of which is provided with a symmetrical fan-shaped turntable (2), and the symmetrical fan-shaped turntable (2) is connected to the cylindrical base (1) through a cover (3); The symmetrical fan-shaped turntable (2) has multiple first hooks (4) fixedly arranged at equal intervals on both the front and rear outer walls. The cylindrical base (1) has multiple second hooks (5) fixedly arranged on both the front and rear outer walls, corresponding to the first hooks (4). The first hooks (4) and the second hooks (5) are connected by elastic ropes (6), so that the symmetrical fan-shaped turntable (2) and the cylindrical base (1) form a closed force system. The cylindrical base (1) has two sets of symmetrically distributed arc-shaped grooves (7) on its top. Each set of arc-shaped grooves (7) has multiple grooves, and a limit baffle (8) is inserted inside one of the arc-shaped grooves (7).

2. The torsional mechanics teaching aid according to claim 1, characterized in that: The symmetrical fan-shaped turntable (2) has a central hole (9) at the top center, and the cylindrical base (1) has a positioning rod (10) integrally formed at the top center that matches the central hole (9). The positioning rod (10) passes through the central hole (9) and extends above the central hole (9).

3. The torsional mechanics teaching aid according to claim 2, characterized in that: The top of the positioning rod (10) is provided with a threaded hole (11), and the cover (3) is threadedly connected to the threaded hole (11). The diameter of the cover (3) is 16mm.

4. The torsional mechanics teaching aid according to claim 1, characterized in that: Multiple arc-shaped grooves (7) are arranged in a linear array on the top of the cylindrical base (1), and the depth of the arc-shaped grooves (7) increases linearly along the radius.

5. The torsional mechanics teaching aid according to claim 1, characterized in that: The cylindrical base (1) and the symmetrical fan-shaped turntable (2) are both made of ABS plastic, and the elastic cord (6) is made of rubber.

6. The torsional mechanics teaching aid according to claim 1, characterized in that: The cylindrical base (1) is 140mm high and 100mm in diameter.

7. The torsional mechanics teaching aid according to claim 2, characterized in that: The symmetrical fan-shaped turntable (2) has a diameter of 100 mm, a thickness of 10 mm, and a fan-shaped angle of 90°. The central hole (9) has a diameter of 9 mm.

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