CN202331996U - Measuring device of spring stiffness coefficient - Google Patents

Abstract

The utility model relates to a spring stiffness coefficient measuring instrument, which is mainly used in experimental teaching in universities, technical secondary schools and primary and secondary schools. It contains electronic balance, bracket, scale, cross bar, fixing screw, light spring and weight. There is a scale on the support, the cross bar is clamped on the support by fixing screws, a light spring is hung on the cross bar, a weight is hung under the spring, and the weight is placed on the weighing pan of the electronic balance. The spring stiffness coefficient measuring instrument changes the elongation of the spring by changing the height and position of the cross bar, and the electronic balance records the change of the force acting on the spring, and obtains the spring stiffness coefficient by Hooke's law.

Description

Spring Stiffness Coefficient Measuring Instrument

technical field

The utility model relates to a spring stiffness coefficient measuring instrument, which is mainly used in experimental teaching in universities, technical secondary schools and primary and secondary schools.

Background technique

At present, there are mainly two methods for measuring the stiffness coefficient of lightweight springs in experimental teaching in universities, technical secondary schools, and primary and middle schools. One is to measure on the air cushion guide rail. The elongation of the spring under the action of the weight and the weight of the weight can be obtained from the spring stiffness coefficient by Hooke's law. The shortcoming of the measurement method is that the measurement error is large, mainly due to the friction generated by the pulley, the friction between the air cushion guide rail and the slider And the tension generated by the horizontal straightening of the spring, and this method needs to combine multiple weights to obtain various tensions, and the operation steps are cumbersome; Various pulling forces can be obtained only by combination, and the pulling force cannot be changed continuously, the operation is cumbersome, and the spring is easily damaged.

Contents of the invention

In order to overcome the shortcomings of the existing methods for measuring the stiffness coefficient of lightweight springs, the utility model provides a spring stiffness coefficient measuring instrument, which can not only adjust the tension acting on the spring arbitrarily, but also measure accurately. The operation is simple and convenient.

The technical solution adopted by the utility model to solve the technical problems is: it contains an electronic balance, a support, a scale, a cross bar, fixing screws, light springs, and weights. There is a scale on the support, the cross bar is clamped on the support by fixing screws, a light spring is hung on the cross bar, a weight is hung under the spring, and the weight is placed on the weighing pan of the electronic balance. By changing the height and position of the crossbar to change the elongation △L of the spring, the electronic balance records the change △F of the force acting on the spring, and the spring stiffness coefficient K=△F/△L is obtained by Hooke's law.

The beneficial effect of the utility model is that the support has a scale, the cross bar is clamped on the support by fixing screws, a light spring is hung on the cross bar, and weights are hung under the springs, and the weights are placed on the weighing pan of the electronic balance. Change the height and position of the crossbar to change the elongation △L of the spring, measure the mass change of the weight through the electronic balance, which is the change △F of the force acting on the spring, and the spring stiffness coefficient can be obtained by Hooke's law , which solves the problems that the existing methods for measuring the stiffness coefficient of lightweight springs cannot continuously change the tension, the operation is cumbersome, and the springs are easily damaged.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Accompanying drawing is the structural representation of the utility model.

In the figure 1. Electronic balance, 2. Bracket, 3. Scale, 4. Cross bar, 5. Fixing screw, 6. Light spring, 7. Weight.

Detailed ways

In the accompanying drawings, the bracket (2) has a scale (3), the bracket (2) is fixed on the electronic balance (1), the crossbar (4) can move on the bracket (2), and can be fixed by the fixing screw ( 5) Clamp on the bracket (2). A lightweight spring (6) is hung on the cross bar (4), and a weight (7) is hung on the lower end of the light spring (6), and the weight (7) is placed on the weighing pan of the electronic balance (1). When changing the height and position of the crossbar to change the elongation △L of the spring, the mass change of the weight measured by the electronic balance is the change of the force acting on the spring △F, and the spring force can be obtained by Hooke's law Degree coefficient K=△F/△L.

Claims (1)

1. A spring stiffness coefficient measuring instrument, which contains electronic balance, bracket, scale, cross bar, fixing screws, light spring, weight, with scale on the bracket, and the cross bar is stuck on the bracket with fixing screws , a light spring is hung on the cross bar, and a weight is hung on the lower end of the light spring. The weight is placed on the weighing pan of the electronic balance. By changing the height and position of the cross bar, the elongation of the spring is changed, and the electronic balance records the force acting on the spring. amount of change.