CN205843854U

CN205843854U - A kind of high accuracy weight beam

Info

Publication number: CN205843854U
Application number: CN201620791393.7U
Authority: CN
Inventors: 师海满
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-07-27
Filing date: 2016-07-27
Publication date: 2016-12-28
Anticipated expiration: 2026-07-27

Abstract

This utility model relates to a kind of high accuracy weight beam, it is characterised in that: this ergometer includes shell, spring, link, connecting rod, hook, main scale, complementary scale and transparent walk scale；The side of described shell is the described main scale being directly arranged on described shell, and opposite side is the complementary scale being placed in the draw-in groove being located at described outer casing frontispiece, described complementary scale energy and can only be parallel to described main scale and move；Described main scale is consistent with the scale of complementary scale, and described transparent walk scale is in the outside of described shell, and two ends are separately fixed on described connecting rod, and its scale range length deducts scale division value length equal to described main scale scale range length.This utility model simple in construction, easy and simple to handle, to be solved technical problem is that is effectively improved weight beam certainty of measurement in terms of technical characteristic.

Description

A kind of high accuracy weight beam

Technical field

This utility model relates to a kind of survey tool, particularly relates to a kind of high accuracy weight beam.

Background technology

At present, weight beam is the survey tool of the power commonly used in physics teaching in secondary school practical activity, utilizes existing Although the Conventional springs ergometer having laboratory can complete related experiment, reach teaching purpose, but prior art device is universal Exist technical problem is that: otherwise range is compared with big but scale division value measurement bigger than normal is accurate not, otherwise scale division value is less but causes Range less measurement scope is limited to；Sometimes the weight beam preparing multiple different size in same experiment could relatively Good completes experiment, uses more inconvenience.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of simple in construction, easy and simple to handle, can be effectively improved A kind of high accuracy weight beam of certainty of measurement.

For solving the problems referred to above, a kind of high accuracy weight beam described in the utility model, it is characterised in that: this dynamometry Meter includes shell, spring, link, connecting rod, hook, main scale, complementary scale and transparent walk scale；The top of described shell is fixed Having described link, its front is plane, and this in-plane is provided with strip gab, and the side of described strip gab is for being directly arranged in Stating the described main scale on shell, opposite side is described complementary scale, and described complementary scale is placed in the draw-in groove being located at described outer casing frontispiece In；One end of described spring is fixed on the inner surface of described shell, and the other end is fixing with described connecting rod to be connected, described connecting rod another One end is described hook；Described transparent walk scale is in the outside of described shell, and two ends are separately fixed on described connecting rod, fixing Point is respectively at 0 scale of described transparent walk scale and described connecting rod freely stretches out the certain point of described housing portion.

Described main scale is consistent with the scale of complementary scale, described complementary scale energy and can only be parallel to described main scale and move, The scale range length of described transparent walk scale deducts scale division value length equal to described main scale scale range length.

Described main scale is parallel with complementary scale, and the width of described transparent walk scale is slightly larger than described main scale and complementary scale Between distance.

This utility model compared with prior art has the advantage that

1, owing to this utility model being provided with main scale, complementary scale and transparent walk scale, described main scale and complementary scale Scale consistent, described complementary scale energy and described main scale can only be parallel to move, the scale range of described transparent walk scale Length deducts scale division value length equal to described main scale scale range length, therefore, it can carry out tradition by main scale conventional Measure, it is also possible to accurately measured by the cooperation of main scale, complementary scale and transparent walk scale.

2, owing to walk scale transparent described in this utility model is in the outside of described shell, two ends are separately fixed at described On connecting rod, fixing point is respectively at 0 scale of described transparent walk scale and described connecting rod freely stretches out described housing portion Certain point, therefore, it can effectively to realize the transparent walk scale size according to institute's dynamometry and moves with described connecting rod and accurately measure.

3, parallel with complementary scale due to main scale described in this utility model, the width of described transparent walk scale is slightly larger than Distance between described main scale and complementary scale, therefore, it can observe easily 0 scale correspondence main scale of transparent walk scale Position and the graduation mark that aligns with main scale or complementary scale of transparent walk scale, thus facilitate reading and pin-point reading.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described in further detail.

Fig. 1 is structural representation of facing of the present utility model, and Fig. 2 is cross-sectional structure schematic diagram of the present utility model.

In figure: the secondary mark of 6 main scales 7 linked up with by 1 shell 2 spring 3 link 4 connecting rod 5 Chi 8 transparent walk scale 9 strip gab 10 draw-in groove 11 connects post.

Detailed description of the invention

Such as Fig. 1, shown in 2, a kind of high accuracy weight beam, it is characterised in that: this ergometer include shell 1, spring 2, Link 3, connecting rod 4, hook 5, main scale 6, complementary scale 7 and transparent walk scale 8；The top of described shell 1 is fixed with described extension Ring 3, its front is plane, and this in-plane is provided with strip gab 9, the side of described strip gab 9 for be directly arranged in described outside Described main scale 6 on shell 1, opposite side is described complementary scale 7, and described complementary scale 7 is placed in the draw-in groove being located at described shell 1 front In 10；One end of described spring 2 is fixed on the inner surface of described shell 1, and the other end is fixing with described connecting rod 4 to be connected, described company The other end of bar 4 is described hook 5；Described transparent walk scale 8 is in the outside of described shell 1, and two ends are separately fixed at described On connecting rod 4, fixing point is respectively at 0 scale of described transparent walk scale 8 and described connecting rod 4 freely stretches out 1, described shell The certain point divided.

Described main scale 6 is consistent with the scale of complementary scale 7, and described complementary scale 7 and can only be parallel to described main scale 6 and move Dynamic, the scale range length of described transparent walk scale 8 deducts scale division value length equal to described main scale 6 scale range length.

Described main scale 6 is parallel with complementary scale 7, and the width of described transparent walk scale 8 is slightly larger than described main scale 6 and pair Distance between scale 7.

0 scale of described transparent walk scale 8 is equivalent to the pointer of conventional springs ergometer.

Embodiment 1 makes explanation

(1) weight beam (without pointer) that similar making is traditional, such as: range is 5N, scale division value is 0.2N.

(2) with the scale of conventional springs ergometer side as main scale, complementary scale draw-in groove and movable auxiliary are set at opposite side Scale: the scale of complementary scale is completely the same with main scale, complementary scale can only move in parallel along draw-in groove with main scale；Complementary scale moves to During top, each scale aligns one by one with the scale of main scale, and complementary scale moves to its 0 scale and the maximum of main scale during lowermost end Scale alignment (is equivalent to main scale is extended one times).

(3) transparent walk scale is made: its width and graduation mark length are slightly larger than the distance between main scale and complementary scale； Its length is suitably larger than the upper end length to ergometer lower end of strip gab, and the length of its scale range is equal to main scale range Length deduct the length of scale division value, then by its scale range n decile.

As: the range of main scale is 5N, and scale division value is 0.2N, then by scale range 25 decile (25 lattice) of main scale；With The length of a length of transparent walk scale scale range of main scale scale 24 lattice, then by its 25 decile, the most transparent walk scale Scale division value be 0.192N, the difference of the scale division value of main scale and walk scale is 0.2N-O.192N=0.008N or 0.2N/25= 0.008N。

(4) transparent walk scale is fixed with connecting rod: transparent walk scale in the outside of shell, the 0 of transparent walk scale Graduation mark is that the pointer of this weight beam aligns with 0 scale of main scale, and fixing point is respectively at described transparent travelling mark Freely stretch out the certain point of housing portion with connecting rod and use column to connect at 0 scale of chi, the most transparent walk scale and company Bar synchronizing moving.

Embodiment 2 tradition general measure.

(1) complementary scale is moved to top so that it is each scale aligns one by one with the scale of main scale.

(2) institute's dynamometry is put on hook, make connecting rod drive transparent walk scale synchronizing moving.

(3) regular readings is carried out according to 0 graduation mark correspondence main scale of transparent walk scale or the corresponding scale of complementary scale (exact value+estimated value).

Embodiment 3 is accurately measured.

(1) complementary scale is moved to lowermost end so that it is 0 scale aligns with the maximum scale of main scale.

Note: now, the complementary scale to bottom pull-out also contributes to judge the direction of pulling force so that it is with the bullet of weight beam The central axial direction of spring is consistent.

(3) if 0 graduation mark of transparent walk scale just aligns with a certain graduation mark of main scale, this scale of main scale The numerical value that line is corresponding is the size (if desired by 0 figure place supplying significant digits) of institute's dynamometry.

(4) if 0 graduation mark of transparent walk scale is between certain two graduation mark of main scale, first according to previous bar scale Line records main scale measured value p；Align further according to a certain graduation mark with main scale or complementary scale on transparent walk scale or Graduation mark close to alignment records walk scale measured value q；Numerical value (p+q) is the size of institute's dynamometry.

As: according to embodiment 1(3) certain high accuracy weight beam made of illustrating, if 0 graduation mark of transparent walk scale Between 1.6N and 1.8N, then p=1.6N；If with the aliging or closest to right of main scale or complementary scale on the most transparent walk scale Neat graduation mark is the 20th lattice, then q=20 × 0.008N=0.16N；Then the size of institute's dynamometry is p+q=1.6N+0.16N=1.76N.

Note: above implementation example be based on most commonly seen range be 5N, scale division value be 0.2N use for laboratory spring survey Making that power meter is carried out or improvement and application, its general making and measuring method be:

If a length of x of the most master/slave scale range [being equivalent to aN], a length of y of scale division value [being equivalent to bN], the most transparent travelling The scale range a length of (x-y) [being equivalent to (a-b) N] of scale.

2. by scale range [being equivalent to (a-b) N] the n decile of transparent walk scale, then its precision is (b/n) N.

When 3. measuring, if 0 graduation mark of transparent walk scale just aligns with a certain graduation mark of main scale, main scale The numerical value that this graduation mark is corresponding is the size of institute's dynamometry；If 0 graduation mark of transparent walk scale is at certain two quarters of main scale Between degree line, first record main scale measured value p according to previous bar graduation mark, further according on transparent walk scale with main scale or pair The a certain graduation mark alignment of scale or the graduation mark (such as m lattice) closest to alignment record walk scale measured value q=m (b/n). Then the size of institute's dynamometry is p+q=p+m (b/n).

Claims

1. a high accuracy weight beam, it is characterised in that: this ergometer includes shell (1), spring (2), link (3), connects Bar (4), hook (5), main scale (6), complementary scale (7) and transparent walk scale (8)；The top of described shell (1) is fixing Stating link (3), its front is plane, and this in-plane is provided with strip gab (9), and the side of described strip gab (9) is direct The described main scale (6) being located on described shell (1), opposite side is described complementary scale (7), and described complementary scale (7) is placed in and is located at In the draw-in groove (10) in described shell (1) front；One end of described spring (2) is fixed on the inner surface of described shell (1), the other end Fixing with described connecting rod (4) and be connected, the other end of described connecting rod (4) is described hook (5)；Described transparent walk scale (8) exists The outside of described shell (1), two ends are separately fixed on described connecting rod (4), and fixing point is respectively described transparent walk scale (8) 0 scale at and described connecting rod (4) freely stretch out described shell (1) part certain point.

2. a kind of high accuracy weight beam as claimed in claim 1, it is characterised in that: described main scale (6) and complementary scale (7) scale is consistent, and it is mobile that described complementary scale (7) and can only be parallel to described main scale (6), described transparent walk scale (8) scale range length deducts scale division value length equal to described main scale (6) scale range length.

3. a kind of high accuracy weight beam as claimed in claim 1, it is characterised in that: described main scale (6) and complementary scale (7) parallel, the width of described transparent walk scale (8) is slightly larger than the distance between described main scale (6) and complementary scale (7).