CN2278209Y

CN2278209Y - Automatic balance

Info

Publication number: CN2278209Y
Application number: CN 96202237
Authority: CN
Inventors: 廖书林
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-08
Filing date: 1996-01-08
Publication date: 1998-04-08
Anticipated expiration: 2006-01-08

Abstract

The utility model relates to an automatic balance to balance the weight of the object. The weighing lever of the traditional lever scale is straight, as to weight the quality of the object, the balance is gained by changing the place of the weight on the lever and then the weight is read, so the process is very complicated. The utility model comes up with an idea that a weighing lever is bent and a weight is fixed; as to weight the object, in the process of lever turning, the arm of force of the object is drawn in and the arm of force of the weight is lengthened; to some extend, the lever can be automatically balanced; moreover, the direction of a pointer is constant and the weight is automatically displayed by the lever turning along with a scale disk; the weighting ranged is extended and the accuracy is increased by altering the fixed position of the weight on the lever. This balance can display with both faces and also has advantages of easy use, easy producing, high precision and uneasy cheating, so the device can be mechanized and mass produced.

Description

Automatic balance

When the utility model was a weighed object physique amount, energy is the mechanical scale of directing object quality automatically.

At present, the traditional steelyard that uses on the market all is to utilize a straight-bar to make lever, and the gravity arm of force of weight is fixed, and the arm of force that leans against slip sliding weight of steelyard change sliding weight of steelyard on the straight-bar makes lever balance, reads the position of sliding weight of steelyard, is the quality of object.This scale uses, and a portable scale, the mobile repeatedly sliding weight of steelyard of another hand, and hell to pay, and lever level whether, the normal and buyer of vender debates endlessly, and this scale is again timber home built, not manageability.

Task of the present utility model is can obtain lever balance automatically and indicate the object quality when proposing a weighed object physique amount, and is easy to use, and can be by machine-building, and cost is low, well-set weighing instrument.

Automatic balance of the present utility model (seeing accompanying drawing) is characterized in that the lever 1 of a bending makes the arm beam of steelyard, and rigid materials such as lever available metal, bakelite and rigid plastic are made.On an end lever arm of curved lever a sliding weight of steelyard 2 is arranged, the other end has steelyard hook 6, and a fulcrum is arranged on the bar, adorns one by blade and carries button 3, and index dial 6 is fixed on the lever.When claiming the object quality, hang weight on the steelyard hook, mention button, lever rotates under the action of gravity of weight, in rotation process, because gravity direction is straight down all the time, when lever rotates, the angle of lever and gravity is changing, and gravity is diminishing automatically to the moment of lever, and is opposite, the rotation of lever makes the gravity that hinders sliding weight of steelyard increase the moment of lever, when lever forwarded to a certain degree, lever balance stopped operating.

In the lever rotation process, because pulling force that the people carries button straight up always, is carried button always at vertical direction with to carry button be that the pointer of one also points to a certain direction all the time as rigid connection.When lever balance, the quality of the scale of pointer indication signal object on the index dial.

For degree of accuracy and the range extension that improves scale, can on lever, do a plurality of fulcrums, or sliding weight of steelyard be made to replace the position, replace arbitrarily and fix at lever several point of fixity of serving, can also adopt the method that increases sliding weight of steelyard, on index dial, pacify carving and the corresponding graduation apparatus of each range.

With this scale carry button be suspended on the fulcrum use more convenient

Can make the moving balance of order on the support as if this scale is hung or is supported in, replace the less demanding counter balance of existing degree of accuracy, use also very convenient.

Fig. 1 is the structure principle chart of automatic balance of the present utility model

Because the angle that pointer turns over is about 90 degree, in Fig. 1, index dial 6 is done strip of sheet in the arc-shaped, about 90 degree of radian, index dial 6 is fixed on the lever arm, is carved with the graduation apparatus corresponding with each range on the index dial.

In Fig. 1, carry button and pointer has certain included angle, when the thing of not weighing, during lever balance, the automatic nulling of pointer is convenient to confirm the accuracy of scale.

In Fig. 1, all true scale in index dial two sides can supply both parties' reading,

In Fig. 1, the index dial high scale is that uneven middle part and this end scale spacing of reading " 0 " at graduation apparatus is bigger, and near maximum, scale spacing is less at reading, weight weight more hour, reading is accurate more.

In Fig. 1, sliding weight of steelyard can be replaced the position, can fix arbitrarily by several point of fixity on lever arm, and when sliding weight of steelyard was fixed on the upper position of bar, the range of scale was little, but the accuracy height, when sliding weight of steelyard was fixed on the lower position of bar, it is big that the range of scale becomes.

Claims

1, a kind of automatic balance, by the arm beam of steelyard, steelyard hook (or scale pan), sliding weight of steelyard, carry institutes such as button, pointer, index dial and form, it is characterized in that the arm beam of steelyard bends, be fixed with index dial on the arm beam of steelyard, carry button and pointer and be rigidly connected as a whole, when claiming the object quality, rotate under action of gravity by lever, make the weight arm of force shorten, and the elongated lever balance of obtaining of the arm of force of sliding weight of steelyard, keep pointed constant, rotation by index dial comes indicant heavy, changes range by changing the fixed position or the conversion sliding weight of steelyard of sliding weight of steelyard on lever.

2, as the said automatic balance of claim 1, it is characterized in that graduation apparatus is a circular arc, about 90 degree of radian, all there is scale on the two sides on the index dial.