spring series-parallel stiffness coefficient comparison experiment instrument

Abstract

Spring series parallel stiffness coefficient comparison experiment instrument, including support, left and right direction horizontal lead screw is rotatably installed on the support, nut block is screwed on the horizontal lead screw, the support rod for hanging spring is directly or indirectly connected on the nut block, the panel is arranged on the support, and the coordinate paper is located on the panel. The lifting adjusting mechanism is connected on the nut block, and the support rod is fixedly connected on the lifting adjusting mechanism. The straight rod is a horizontal T-shaped rod. The experimental instrument can conveniently measure the stiffness coefficient of single spring, spring series and spring parallel, and the result is intuitive.

Description

Technical Field

[0001] This utility model relates to a test instrument for the elastic coefficient of springs, and in particular to a comparative experimental instrument for the spring coefficients of series and parallel springs, belonging to the field of teaching instrument technology. Background Technology

[0002] The spring constant (elastic coefficient) of a spring is an important topic in physics teaching. A more intuitive demonstration of Hooke's Law can give students a more direct, profound, and comprehensive understanding of it. The most common way to demonstrate Hooke's Law in physics teaching is to use a spring scale with weights and measure the length of the stretch caused by different weights on the spring scale to obtain the spring constant. To make the demonstration more intuitive, the inventors disclosed a spring constant demonstration experimental device in CN218647538U. This device uses two rotating cylinders to move coordinate paper. After hanging different weights on the spring, the corresponding discrete points are obtained directly on the coordinate paper. Then, by connecting the points, the spring constant can be obtained intuitively. This is an improvement over the traditional spring constant demonstration. However, it was found that the coordinate paper is prone to wrinkling and deformation during the movement of the device. This leads to a difference between the unfolded coordinates and the actual coordinates, which will cause measurement errors. Furthermore, apart from a spring progression coefficient demonstration experiment, there are currently few good experimental devices for demonstrating the progression coefficient of springs in series and parallel connections for in-depth teaching understanding. Summary of the Invention

[0003] The purpose of this invention is to overcome the aforementioned problems in existing spring stiffness coefficient experimental demonstration equipment and to provide a spring series and parallel stiffness coefficient comparison experimental instrument.

[0004] To achieve the purpose of this utility model, the following technical solution is adopted: a spring series and parallel spring coefficient comparison test instrument, including a bracket, a horizontal lead screw in the left and right direction is rotatably installed on the bracket, a nut slider is screwed on the horizontal lead screw, a support rod for suspending the spring is directly or indirectly connected to the nut slider, a panel is provided on the bracket, and coordinate paper is located on the panel.

[0005] Furthermore, a lifting adjustment mechanism is connected to the nut slider, and the support rod is fixedly connected to the lifting adjustment mechanism. The straight rod is a horizontal T-shaped rod.

[0006] Furthermore, the lifting and adjusting mechanism is a vertical lead screw, with the nut of the vertical lead screw fixedly connected to the nut slider, and the vertical lead screw screw screwed into the nut.

[0007] Furthermore, the lifting and adjusting mechanism is a telescopic rod with a locking mechanism.

[0008] Furthermore, the panel is an acrylic background board, the coordinate paper is transparent coordinate paper, and the transparent coordinate paper shell is detached and fixed on the panel.

[0009] Furthermore, both the horizontal and vertical leadscrews are connected to handles at their ends, or both the horizontal and vertical leadscrews are provided with handle locking parts at their ends.

[0010] Furthermore, the horizontal T-shaped rod is an adjustable horizontal rod or a telescopic horizontal rod.

[0011] The positive and beneficial technical effects of this utility model are as follows: This experimental instrument can conveniently measure the spring constant of a single spring, springs in series, and springs in parallel. The results are intuitive and will be explained in detail with reference to specific implementation methods. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of a partial structure of one embodiment of the present invention.

[0013] Figure 2 This is a top view schematic diagram of a partial structure of one embodiment of the present invention. Detailed Implementation

[0014] To more fully explain the implementation of this utility model, implementation examples are provided. These implementation examples are merely illustrative of this utility model and do not limit its scope.

[0015] The present invention will be further explained in detail with reference to the accompanying drawings, in which the following references are made: 1: bracket; 2: panel; 3: horizontal lead screw; 4: nut slider; 5: nut; 6: vertical lead screw; 7: T-shaped rod.

[0016] As shown in the attached diagram, the spring series-parallel stiffness coefficient comparison experimental apparatus includes a support 1. Adjustable feet can be installed under the support 1 to adjust the support's level, ensuring the horizontal lead screw is in a horizontal state. More optimally, a level can be installed on the support to ensure a level state during use. The adjustable feet are existing accessories. A horizontal lead screw 3, rotatably mounted on the support 1 in a left-right direction, is screwed onto the horizontal lead screw with a nut slider 4. The horizontal lead screw can be a self-locking lead screw. The support rod for suspending the spring is directly or indirectly connected to the nut slider. A panel 2 is fixedly mounted on the support, with graph paper located on the panel. Optimally, to facilitate graph paper positioning, a plumb line can be set on the panel. In this embodiment, the panel is an acrylic background board, and the graph paper is transparent graph paper. The transparent graph paper is detachably fixed to the panel, has a certain elasticity, and is not easily wrinkled. The transparent graph paper can be adhered to the panel with tape for easy removal. Alternatively, a magnetic whiteboard can be used, where the graph paper is fixed by magnets.

[0017] A lifting and adjusting mechanism is connected to the nut slider, and a support rod is fixedly connected to the lifting and adjusting mechanism. The straight rod is a horizontal T-shaped rod 7. During the experiment, when two springs are connected in series, the T-shaped rod can be hung on the horizontal side (left-right arrangement) or on the vertical side (front-back arrangement). The horizontal T-shaped rod can be a horizontal rod that can be adjusted back and forth or a horizontal rod that can be extended back and forth. The horizontal rod that can be extended back and forth or adjusted back and forth is a commercially available product. The lifting and adjusting mechanism can adjust the height of the suspended springs to meet the experimental demonstration of the spring constant when springs are connected in series. In this embodiment, the lifting and adjusting mechanism is a vertical lead screw 6, and the nut 5 of the vertical lead screw is fixedly connected to the nut slider 4. The vertical lead screw is screwed into the nut, and rotating the vertical lead screw can adjust the height of the support rod to meet the experimental needs of springs of different lengths. In this embodiment, as an optimized way of fixing the T-shaped rod, two nuts can be screwed onto the vertical lead screw, and an open slot piece can be fixedly connected to the end of the T-shaped rod. The open slot is inserted between the two nuts on the vertical lead screw, and then locked and fixed by the two nuts. This method is very easy to understand and will not be shown in the figure. To facilitate the hanging of springs, multiple holes for hanging springs can be made on both sides of the T-shaped rod.

[0018] Both the horizontal and vertical leadscrews have handles connected to their ends, or both ends have handle locking parts. In this embodiment, both the horizontal and vertical leadscrews have handles connected to their ends; Figure 8 shows one handle.

[0019] The lifting and adjusting mechanism can also be a telescopic rod with locking mechanism. There are many telescopic rods with locking mechanism on the market, such as sleeves with set screws, etc., which will not be described in detail here.

[0020] When using this experimental apparatus, after adjusting it to be level, hang the spring on the T-shaped rod, fix the coordinate paper on the panel, and mark the initial coordinates of the spring length. Then, move the set coordinate grid, add weights, and mark the spring length coordinates again. Repeat this process, connecting the marked points to obtain the spring constant curve. When two springs are connected in parallel, it is best to adjust them so that the lower ends of the two springs are at the same horizontal level. This can be achieved by connecting rigid wires of different lengths to the upper ends of the springs.

[0021] The accuracy coefficients of two springs, the spring constant of two springs connected in series, and the spring constant of two springs connected in parallel can be tested separately on the same graph paper, and the experimental results can be obtained very intuitively.

[0022] After a detailed description of the embodiments of this utility model, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the technical solution of this utility model, and this utility model is not limited to the embodiments of the examples given in the specification.

Claims

1. A spring series and parallel spring coefficient comparison test apparatus, including a support frame, characterized in that: A horizontal lead screw is rotatably mounted on the bracket, and a nut slider is screwed onto the horizontal lead screw. The support rod for suspending the spring is directly or indirectly connected to the nut slider. A panel is set on the bracket, and the coordinate paper is located on the panel.

2. The spring series-parallel spring coefficient comparison experimental apparatus according to claim 1, characterized in that: A lifting adjustment mechanism is connected to the nut slider, and a support rod is fixedly connected to the lifting adjustment mechanism. The support rod is a horizontal T-shaped rod.

3. The spring series-parallel spring coefficient comparison experimental apparatus according to claim 2, characterized in that: The lifting and adjusting mechanism is a vertical lead screw, and the nut of the vertical lead screw is fixedly connected to the nut slider. The vertical lead screw is screwed into the nut.

4. The spring series-parallel spring coefficient comparison experimental apparatus according to claim 2, characterized in that: The lifting and adjusting mechanism is a telescopic rod with locking mechanism.

5. The spring series-parallel spring coefficient comparison experimental apparatus according to claim 1, characterized in that: The panel is an acrylic background board, and the graph paper is transparent graph paper. The transparent graph paper shell is detached and fixed on the panel.

6. The spring series-parallel stiffness coefficient comparison tester according to claim 3, characterized in that: Both the horizontal and vertical lead screws have handles connected to their ends, or both ends have a handle locking part.

7. The experimental apparatus of claim 2, wherein: The horizontal T-shaped bar is either an adjustable horizontal bar or a telescopic horizontal bar.

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