CN201838229U

CN201838229U - Jolly balance

Info

Publication number: CN201838229U
Application number: CN2010205566183U
Authority: CN
Inventors: 唐文强
Original assignee: Guilin University of Technology
Current assignee: Guilin University of Technology
Priority date: 2010-10-10
Filing date: 2010-10-10
Publication date: 2011-05-18
Anticipated expiration: 2020-10-10

Abstract

The utility model discloses a Jolly balance. An electronic balance (1) is arranged on a base (10), horizontal adjusting nuts (9) are arranged under the base (10), a sleeve (7) is connected with the base (10), a movable rod (6) is connected to the upper portion of the sleeve (7), a knob (8) is sleeved on the lower portion of the sleeve (7), the top of the movable rod (6) is connected with a cross beam (5), the other end of the cross beam (5) is provided with a hook (4), an auxiliary weight (2) is placed on a pan of the electronic balance (1), a light spring (3) to be tested is connected with the auxiliary weight (2) and a hook (4) and keeps paralleling with the movable rod (6), a ten-dial vernier of the accuracy of 0.1mm is arranged on the sleeve (7), and a graduated scale with the scale internal of 1mm is arranged on the movable rod (6). The Jolly balance has the advantages of simplicity in operation and clear measurement data, and is capable of not only measuring mass of an object but directly measuring stiffness coefficient of the light spring and surface tension of liquid.

Description

A kind of Joly balance

Technical field

The utility model relates to a kind of Joly balance, is a kind of physics experiment teaching instrument commonly used of institution of higher education.

Background technology

Joly balance is commonly used to measure size, object quality of the stiffness factor that flicks spring, liquid surface tension coefficient, power etc. in physics experiment teaching, for example, when the stiffness factor of spring is flicked in measurement, hang on the pull bar crossbeam flicking the spring upper end, the lower end hangs one is carved with the horizontal groove indicator stem of (being called the activity directrix), indicator stem is hung the scale pan down, putting certain weight on the scale pan earlier makes and flicks spring and suitably stretched, at this moment raising rod makes on the spring and moves to " three-way " alignment, from the pull bar on main scale scale and the fixed bar vernier read l ₀, on the scale pan, add counterweight then, flick spring and be elongated naturally, the lower end descends, rotary knob promotes pull bar, moves to " three-way " on the spring and aligns again, read l ₁, at this moment, the elongation that flicks spring is Δ l=l ₁-l ₀Obviously, when using old-fashioned Joly balance measurement to flick the stiffness factor of spring, all must be adjusted to " three-way alignment " at every turn, use loaded down with trivial detailsly, and find that in teaching the student loses counterweight easily; In addition, can not directly measure surface tension, the size of power, the object quality of liquid with old-fashioned Joly balance.

Summary of the invention

Purpose of the present invention just provides a kind of simple to operate, open-and-shut Joly balance of force measurement that has.

Technical solution of the present invention: electronic balance is placed on the base, and the horizontal adjustment nut is arranged under the base; The sleeve pipe base of ining succession, the sleeve pipe top motion bar of ining succession, knob is arranged at the sleeve pipe bottom; The motion bar top crossbeam of ining succession, the crossbeam other end has a hook, and auxiliary weight is placed on the scale pan of electronic balance; The spring connection auxiliary weight of flicking to be measured is parallel with motion bar with hook and maintenance; It is the ten minutes degree vernier of 0.1mm that accuracy is arranged on the sleeve pipe, and it is the rule of 1mm that scale division value is arranged on the motion bar.What (sizes of power) of electronic balance display quality show the movement of objects amount in the vertical rod.

The utlity model has simple to operate, the open-and-shut characteristics of measurement data, not only energy measurement object quality can also directly be measured the stiffness factor that flicks spring, the surface tension of liquid.

Description of drawings

Accompanying drawing is the utility model schematic appearance.

Mark among the figure: 1. electronic balance, 2. auxiliary weight, the spring that flicks 3. to be measured, 4. hook, 5. crossbeam, 6. motion bar, 7. sleeve pipe, 8. knob, 9. horizontal adjustment nut, 10. base.

Embodiment

Embodiment:

As shown in the figure, electronic balance 1 is placed on the base 10, and base has horizontal adjustment nut 9 10 times; Sleeve pipe 7 base 10 of ining succession, the sleeve pipe 7 tops motion bar 6 of ining succession, knob 8 is arranged at sleeve pipe 7 bottoms; The motion bar 6 tops crossbeam 5 of ining succession, crossbeam 5 other ends have a hook 4, and auxiliary weight 2 is placed on the scale pan of electronic balance 1; The spring 3 connection auxiliary weight 2 of flicking to be measured are parallel with motion bar 6 with hook 4 and maintenance; It is the ten minutes degree vernier of 0.1mm that accuracy is arranged on the sleeve pipe 7, and it is the rule of 1mm that scale division value is arranged on the motion bar 6.

Claims

1. a Joly balance is characterized in that electronic balance (1) is placed on the base (10), has horizontal adjustment nut (9) under the base (10); Sleeve pipe (7) base (10) of ining succession, sleeve pipe (7) the top motion bar (6) of ining succession, knob (8) is arranged at sleeve pipe (7) bottom; Motion bar (6) the top crossbeam (5) of ining succession, crossbeam (5) other end have a hook (4), and auxiliary weight (2) is placed on the scale pan of electronic balance (1); Spring (3) the connection auxiliary weight (2) of flicking to be measured is parallel with motion bar (6) with hook (4) and maintenance; It is the ten minutes degree vernier of 0.1mm that accuracy is arranged on the sleeve pipe (7), and it is the rule of 1mm that scale division value is arranged on the motion bar (6).