CN202331996U

CN202331996U - Measuring device of spring stiffness coefficient

Info

Publication number: CN202331996U
Application number: CN2011204313986U
Authority: CN
Inventors: 邓志宏; 文景; 陈光伟; 夏湘芳; 李伦皋; 彭柯铭
Original assignee: Hunan University of Technology
Current assignee: Hunan University of Technology
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-07-11
Anticipated expiration: 2021-11-04

Abstract

A measuring device of spring stiffness coefficient is mainly used for experimental teaching in universities, colleges, technical secondary schools, middle schools and primary schools. The device comprises an electronic scale, a support rack, a dividing ruler, a transverse rod, a fixing screw, a light spring, and weights. The support rack is provided with the dividing ruler, the transverse rod is clamped to the support rack by the fixing screw, the light spring is hung on the transverse rod, weights are hung under the spring, and the weights are positioned on weighting pans of the electronic scale. Accordingly, the electrical scale records variation of force acted on the spring and the spring stiffness coefficient is found by Hook's law through changes of transverse rod height and spring extension.

Description

Spring stiffness factor measuring instrument

Technical field

The utility model relates to a kind of spring stiffness factor measuring instrument, is mainly used in big, special secondary school universities and colleges and middle and primary schools' experimental teaching.

Background technology

At present; Greatly, the method for measurement light spring stiffness factor mainly contains two kinds in special secondary school universities and colleges and the middle and primary schools' experimental teaching; The one, on air track, measure, pass through the suspended counterweight at guide rail one end during operation, elongation and the counterweight weight of record light spring under the counterweight effect; Try to achieve the spring stiffness factor by Hooke's law; The deficiency of its measuring method is that measuring error is big, mainly is the friction of the pulley friction, air track and the slide block that produce and the tension force of the horizontal stretching generation of spring, and this method need make up a plurality of counterweights and just can obtain various pulling force, complex operation step; Another kind method is to utilize Joly balance to measure, and its shortcoming also is just can obtain various pulling force to a plurality of counterweights combinations, and pulling force can not change continuously, complex operation, and spring is fragile.

Summary of the invention

In order to overcome the deficiency of existing measurement light spring stiffness factor method; The utility model provides a kind of spring stiffness factor measuring instrument; This spring stiffness factor measuring instrument regulating action is arbitrarily measured accurately in the pulling force of spring, and simple, convenient.

The utility model solves the technical scheme that its technical matters adopted: it contains electronic balance, support, rule, cross bar, fixed screw, light spring, counterweight.Have rule on the support, cross bar is stuck on the support with fixed screw, hangs light spring on the cross bar, hangs counterweight below the spring, and counterweight is placed on the scales/electronic balance weighing dish.Change the elongation △ L of spring through the height and position that changes cross bar, the variable quantity △ F that the electronic balance record acts on the power of spring tries to achieve spring stiffness factor K=△ F/ △ L by Hooke's law.

The beneficial effect of the utility model is; Have rule on the support, cross bar is stuck on the support with fixed screw, hangs light spring on the cross bar; Hang counterweight below the spring; Counterweight is placed on the scales/electronic balance weighing dish, and the height and position that changes cross bar changes the elongation △ L of spring, is the variable quantity △ F of the power that acts on spring through the mass change amount of electronic balance measurement counterweight; Can try to achieve the spring stiffness factor by Hooke's law, solve existing measurement light spring stiffness factor method and can not continuously change pulling force, complex operation, the flimsy problem of spring.

Description of drawings

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

Accompanying drawing is the structural representation of the utility model.

1. electronic balances among the figure, 2. support, 3. rule, 4. cross bar, 5. fixed screw, 6. light spring, 7. counterweight.

Embodiment

In the accompanying drawings, support (2) has rule (3), and support (2) is fixed on the electronic balance (1), and cross bar (4) can be gone up at support (2) and move, and can be stuck on the support (2) through fixed screw (5).Cross bar (4) is gone up and is hung light spring (6),, light spring (6) lower end hangs counterweight (7), and counterweight (7) is placed on electronic balance (1) weighing pan.When the height and position that changes cross bar changed the elongation △ L of spring, the variable quantity △ F that the mass change amount of measuring counterweight through electronic balance is the power that acts on spring can try to achieve spring stiffness factor K=△ F/ △ L by Hooke's law.

Claims

1. spring stiffness factor measuring instrument, it contains electronic balance, support, rule, cross bar, fixed screw, light spring, counterweight, has rule on the support; Cross bar is stuck on the support with fixed screw; Hang light spring on the cross bar, the light spring lower end hangs counterweight, and counterweight is placed on the scales/electronic balance weighing dish; Change the elongation of spring through the height and position that changes cross bar, the electronic balance record acts on the variable quantity of the power of spring.