CN2271707Y

CN2271707Y - Hand beam counterweight

Info

Publication number: CN2271707Y
Application number: CN 95221473
Authority: CN
Inventors: 岳宗义
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-15
Filing date: 1995-09-15
Publication date: 1997-12-31
Anticipated expiration: 2005-09-15

Abstract

The utility model relates to a portable weighing apparatus-hand beam counterweight, belonging to the technical field of a daily weighing apparatus. The utility model adopts a connecting leverto make two sets of lever mechanisms connect to a same casing so as to shorten the lengths of levers in the lever mechanisms, and furthermore, a large and a small sliding weights are inlaid and sheathed on a main and an auxiliary measuring levers and are not easily disassembled so that the utility model overcomes the phenomenon that a lever and a weight of a wood lever scale are separated, carries out lead seal and elimites the phenomena that people carry out the falsification and the loss in weight on scales. The utility model is additionally provided with a fine regulating screw under a balance block so that the hand beam counterweight has the function of zero adjustment functions and the advantages of high precision, small volume and high durability, and the utility model becomes a portable weighing apparatus welcomed and trusted by people.

Description

Hand beam counterweight

The utility model provides a kind of portable portable weighing apparatus---Hand beam counterweight.

At present, the use of wood steelyard on market is still comparatively general.The shortcoming that rod claims is weighing lever, claims thallium to separate, some people is practised fraud; Weighing lever is generally longer, and frangibility and inconvenience are carried; Accuracy is not enough, is subject to climate effect etc.

The purpose of this utility model provides the portable Hand beam counterweight that a kind of small and exquisite, accurate, bar thallium that utilizes lever principle to make can't separate.

The purpose of this utility model is achieved in that Hand beam counterweight comprises that two cover leverages and one show accurate device; Two cover leverages are flexibly connected by connecting link (14), last tie point (20) is between counterbalance weight (4) and fulcrum (15), two overlap the fulcrum (15,16) of leverages and show that accurate device (12) all is installed on the same housing (2), counterbalance weight (4) and fine adjustment screw (5) are equipped with in fulcrum (15) left side that wherein is in the first cover leverage (3) of top, and the right side is equipped with metering mobile jib (17) and big trip thallium (8), is measured secondary bar (18) and little trip thallium (9); Wherein the fulcrum (16) of the second cover leverage (6) and the tie point (19) of connecting link lower end are in the lever two ends respectively, and hook (7) is installed between fulcrum (16) and the tie point (19).The upper end tie point (20) of connecting link (14) is between counterbalance weight (4) and the fulcrum (15).A Hand-held hook (1) is equipped with in the top of housing (2); Housing (2) is furnished with a vinyl cover, removes the major and minor bar of metering, large and small trip thallium, outside fine adjustment screw, Hand-held hook, the hook, other part by this vinyl cover clad before; The plastics clad is equipped with lead sealing (13).Measure major and minor bar and be marked with metering scale (11).The also equipped system tight screw (10) in little trip thallium (9) below.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural principle synoptic diagram.

Fig. 2 is that the utility model removes structural representation behind the vinyl cover.

Because in the second cover lever (6), the lower end tie point (19) of connecting link (14) arrives the distance of fulcrum (16) greater than hook (7) force (21) apart from the length of fulcrum (16), according to lever balance theory, after hanging up weight, only need a power just can make lever balance above the connecting link (14) less than weight, in other words, institute is stressed less than hook weight gravity on the first cover leverage force (20), thereby makes long shortening of bar in the middle of the cover leverage (3) of winning.

Before the use, size is swum thallium move to scale " 0 " and locate, turn fine adjustment screw (5) makes the measuring stick level and aims at and show accurate device (12), like this " zeroing " finish, can begin to weigh.After weighing with scale (11) the reading addition of the secondary bar of weighing mobile jib and weighing, weighed object weight just.

The new machining that adopts of this practicality, the degree of accuracy height, size trip thallium is enclosed within on the metering major-minor bar by edge, is difficult for demolition, after the lead sealing, prevents the means of practising fraud of conversion trip thallium on the vinyl cover.The utility model can be made into series of products.Because volume is little, degree of accuracy is high, the unification of bar thallium, thereby very suitable carrying, and is popular.

Claims

1, a kind of portable Hand beam counterweight is characterized in that comprising that two cover leverages and one show accurate device; Two cover leverages are flexibly connected by connecting link (14), last tie point (20) is between counterbalance weight (4) and fulcrum (15), two overlap the fulcrum (15,16) of leverages and show that accurate device (12) all is installed on the housing (2), counterbalance weight (4) and fine adjustment screw (5) are equipped with in fulcrum (15) left side that wherein is in the first cover leverage (3) of top, and the right side is equipped with metering mobile jib (17) and big trip thallium (8), is measured secondary bar (18) and little trip thallium (9); Wherein the fulcrum (16) of the second cover leverage (6) and the tie point (19) of connecting link lower end are in the lever two ends respectively, and hook (7) is installed between fulcrum (16) and the tie point (19).

2, Hand beam counterweight according to claim 1 is characterized in that a Hand-held hook (1) is equipped with in the top of housing (2); Housing (2) is furnished with a vinyl cover, removes the major and minor bar of metering, large and small trip thallium, and outside fine adjustment screw, Hand-held hook, the hook, other part by this vinyl cover clad; The plastics clad is equipped with lead sealing (13).