Novel Joly balance

Abstract

The invention discloses a novel Joly balance, which comprises a stand (1), a screw rod (2), an outer barrel (4), a lifting barrel (6), a rotation stopping screw (7), a vernier (8), a screw (9), a handle (18), a turntable (19), a connecting screw (26) and a measuring part, wherein the inner bottom end of the outer barrel (4) is provided with an internal thread; the outer barrel (4) is perpendicularly fixed at the center position of the stand (1); the screw rod (2) passes through the bottom of the stand (1) and is screwed into the outer barrel (4); the upper end of the screw rod (2) is providedwith a ring slot; after the lifting barrel (6) is inserted into the outer barrel (4) from the upper part, the ring slot in the upper end of the screw rod (2) is inserted into the bottom of the liftingbarrel (6); the connecting screw (26) passes through the lifting barrel (6) and is inserted into the ring slot in the upper end of the screw rod (2); and the screw rod (2) can drive the lifting barrel (6) to move axially, but cannot drive the lifting barrel (6) to rotate. The measuring precision of the novel Joly balance is greatly improved, and the novel Joly balance works reliably and is convenient to operate.

Description

technical field [0001] The invention relates to a physical experiment instrument, in particular to a novel Jolie balance. Background technique [0002] Joley's balance is an instrument commonly used to measure force in physics and general scientific experiments. It is generally used to measure tiny forces. For example, the surface tension coefficient of liquid in physical experiments is measured by Joley's balance, that is, the pull-off method. The surface tension coefficient of a liquid. Existing Jolly scales generally consist of a lifting mechanism, a support 1 and a measuring part, wherein the structure of the lifting mechanism is as follows: figure 2 As shown, the outer cylinder 4 is vertically fixed on the support 1, and the elevating cylinder 6 is inserted into the inside of the outer cylinder 4; the lower end of the metal rod 23 is connected to the runner 21 (the runner 21 can rotate on the metal rod 23), and the upper end is fixedly installed with a plunger 24 The ...

AI Technical Summary

Problems solved by technology

[0003] The application number is that 200720058809.5 discloses "a kind of easy-to-use Jolly's balance", though adopts screw drive, still has the following problems: (1) still contains belt drive in the drive route, does not solve the difficulty of above-mentioned belt drive, Gear transmission also has an impact on the passive parts. From the principle of mechanical transmission, the instantaneous speed of the passive parts is not constant; (2) The structure is loose and complex, and the transmission chain in the lifting mechanism is long, which will inevitably bring greater damage. Error; (3) The screw thread part used is too long, about 1.5m in total, the processing cost is too high, the design is unreasonable, and it is extremely inconvenient to use

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