CN2035469U

CN2035469U - Two-way dynameter

Info

Publication number: CN2035469U
Application number: CN 88208323
Authority: CN
Inventors: 冯振家; 刘凯; 袁宝奎; 沈英琪; 杨树苹
Original assignee: TEACHING INSTR I STATE EDUCATI
Current assignee: TEACHING INSTR I STATE EDUCATI
Priority date: 1988-07-16
Filing date: 1988-07-16
Publication date: 1989-04-05

Abstract

The utility model relates to a two-way dynameter which can simultaneously display the magnitude and the orientation of the measured force in the teaching. The utility model is formed by that a light weight core rod of which the central part is thick and both ends are thin is sheathed with two compressed springs; both end caps are sealed in a circular pipe, displacement produced by the stress of the core rod is transferred to gear wheels through racks which are arranged in the middle of the core rod, the displacement is magnified through an indicating needle, and the turning and the magnitude of the rotation angle of the indicating needle display the direction and the size of the measured force; the two-way dynameter is clamped on the rotatable clamps, which can enable the dynameter automatically to point to the power pivot.

Description

Two-way dynameter

The utility model relates in a kind of teaching and can show simultaneously by the device for measuring force of the size and Orientation of dynamometry.

In education experiment, the device for measuring force of Shi Yonging can show the size and Orientation of power simultaneously in the past, had only " the disk dynamometer " that use two extension springs, but this instrument body is big, heavy, clamping is inconvenient, the proterties of " bar " is not obvious, and line of action of force is unclear, causes a lot of experiments not adopted.Other dynamometer mostly is to adopt an extension spring, needs before the use to put according to being given in advance by the direction of dynamometry.Force measurement is one of basic contents in the physics teaching, and because the defective on the above-mentioned various dynamometer functions is brought inconvenience to teaching.When particularly saying the relevant natural law of the vector character of the power of granting, do not have desirable education experiment so far, the direction of power generally needs by judging, the main dependence of the size of power calculated.Because the student lacks the perceptual knowledge of this respect, and notional result is often thrown doubt upon, be the difficult point in the teaching.

The purpose of this utility model is that a kind of device for measuring force will be provided, and size that can ergometry can show the direction of power again, and enough visibilitys are arranged.The proterties of this device " bar " is obvious, and light weight is convenient to clamping, and available its is assembled into simple truss-frame structure.

Structure of the present utility model is: the plug of faciola step is omited at the thick two ends, centre of inserting a lightweight in the pipe of fixed length, respectively be inserted in a stage clip (can select its coefficient of stiffiness as required) at plug two thin ends, two threaded end caps are passed plug, go up two ends respectively, end cap is just in time contacted with stage clip with the plug step and do not stress at pipe.When the motion of the stressed either direction vertically of plug, must have a stage clip to be compressed and reached balance, and another stage clip is in free state by dynamometry.Open an axial straight trough at pipe middle part, a tooth bar is contained in the middle part of plug and exposes outside the groove.When plug is stressed, tooth bar rotates by the pointer that drives the gear that cooperates with it and be contained on the gear, demonstrates the plug displacement situation that has been exaggerated on fan dial.The index dial zero-bit can be read stressed direction of plug and size in the centre by the direction of pointer rotation and the size of corner.Because plug and stage clip quality are very little, rack-and-pinion ties in, and dynamometry is interfered very little, by the spinning in and out of two end caps, can return to zero very easily, thereby guarantee the precision of dynamometry.In addition, this device can be clamped on the clip that can rotate in specific plane very easily as required, makes this device can automatically adjust the orientation, keeps plug (by backguy or extension bar) to point to the force, make not produce component in the measurement, also improved the accuracy of measuring.The extension bar and the hinge arrangement of all right adjunction different length in plug two ends can be formed simple truss easily.

The concrete structure of utility model is provided by the following drawings.

Accompanying drawing is front elevation of the present utility model and has done partly and cut open.

This device is to insert plug (2) in pipe (1), and stage clip (3) is inserted in the thin portion in two ends of plug (2), and end cap (4) is by just in time propping up stage clip (3) on cylinder (1) on the screw thread.When plug (2) is subjected to a certain axially power, must there be one to be compressed in two stage clips (3), its compression degree shows on index dial (8) by tooth bar (5) and gear (6), the pointer (7) that is contained on the plug (2).By the rotation direction of pointer (7), can express is that the spring which is held is compressed, thereby obtains the direction of power.

The utility model except stage clip, all available engineering plastics manufacturings that some strength is arranged.

Claims

1, in education experiment, can show simultaneously by the size and Orientation of dynamometry, and the double-acting forcemeter of big visibility is arranged, it is characterized in that:

A., the slightly thin plug with the level in thick two ends, centre of one lightweight is arranged in pipe, respectively be inserted in a stage clip at the plug two ends, the end cap of two band microgrooves passes respectively on the plug at the pipe two ends, and end cap is just in time contacted with stage clip with the plug step;

B. have an axial straight trough at the pipe middle part, a tooth bar is loaded on the plug middle part and exposes outside the groove, and tooth bar can drive the gear and the pointer that are loaded on the pipe and rotate, and shows the size and Orientation of plug displacement on the fan dial of zero-bit in the centre.

2, device according to claim 1, it is characterized in that can be at plug two ends adjunction extension bar.