CN2245213Y

CN2245213Y - Portable spring balance with digital disc

Info

Publication number: CN2245213Y
Application number: CN 95218773
Authority: CN
Inventors: 徐文光
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-25
Filing date: 1995-08-25
Publication date: 1997-01-15
Anticipated expiration: 2005-08-25

Abstract

The utility model relates to a portable spring balance with a digital disc, belonging to a measuring device. The utility model comprises a weighing device composed of a hanging ring, an object weighing hook, a damping spring, a load bearing frame and a measuring spring, an indicating device composed of a rack, a gear, an indexing disc and an indicating needle, a disc face composed of a face mask and a housing, a zero position fine regulating device composed of a fine regulating screw and a fine regulating frame and a part assembly supporting frame arranged in the housing and capable of installing the indicating device. The utility model has the advantages that the portable spring balance with digital disc has simple structure without wrong measurement in the process of weighing, ensures the reasonable arrangement of the parts of the indicating device, has no indicating failure, etc.

Description

Portable spring dial scale

The utility model is a kind of portable spring dial scale, belongs to measurement instrument.

Chinese patent discloses a kind of name and has been called hanging scale spring balance, its patent No. is 92209912.X, though highly sensitive, the close advantages of higher of calibration that this scale has, but because its structure relative complex, for example the indicating device of being made up of tooth bar, gear, pointer, index plate etc. has adopted gear and duplicate gear respectively, thereby in the metering process of two circles, easily two circle mistakes are prone to erroneous judgement as a circle or with a circle mistake as second circle, and two gears are because of needing corresponding fixture respectively, thereby cause complex structure; Also have, under work or off working state, can not guarantee all the time to cause indicating problems such as malfunctioning with the gear tight connecting because of none assembly bracket of rationally preparing for the parts of this indicating device exists such as tooth bar.

Task of the present utility model be to provide a kind of and can not occur judging by accident, parts simple in structure, indicating device can rationally be provided with, indication can be not malfunctioning portable spring dial scale.

Task of the present utility model is finished like this, a kind of portable spring dial scale, and it comprises by suspension ring 1, claims the weighing device that thing hook 9, damping spring 8, bearing frame 7, metering spring 6 are formed; The indicating device of forming by tooth bar 10, gear 11, index plate 15 and pointer 14; The card of forming by face shield 17, shell 18; The trimming zero position device of forming by micrometer adjusting screw 2, micropositioning stage 4; The assembly bracket of all parts that indicating device can be set that in housing 18, are provided with.

Below in conjunction with accompanying drawing the utility model is further described below.

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the side view of the utility model Fig. 1.

Assembly bracket of the present utility model is made up of rack body 22, support upper plate 3, support lower plate 21, and the upper and lower plate 3,21 of support is also fixing with shell 18 respectively with the upper and lower end integral production of rack body 22 respectively.By metal material upper and lower plate 3,21 of support and rack body 22 are processed into one, fixing by with upper and lower plate 3,21 of support and housing 18 is arranged at whole assembly bracket in the housing 18 thereby reach.

The middle part of rack body 22 of the present utility model is provided with gear fixed mount 12, offers groove and axis hole on it respectively.Also have axis hole on rack body 22, an end of gear shaft 19 is set in it, the other end of gear shaft 19 inserts in the axis hole that is opened on the gear fixed mount 12, and guarantees that gear shaft 19 rotates freely.Be bumped into the tooth bar 10 of indicating device in the groove on the gear fixed mount 12, because the width of this groove and the degree of depth match with width, the thickness of tooth bar 10 respectively, thereby tooth bar 10 can do upper and lower slip on last its groove, when dislocation can not appear during in upper and lower motion in tooth bar 10.The gear 11 of indicating device and pointer 14 are installed on the gear shaft 19, and the tooth on the gear 11 is meshed with the tooth of tooth bar 10.During assembling, earlier the index plate 15 with indicating device is screwed on the rack body 22 of assembly bracket, and then on gear shaft 19 fixed pointers 14.If will make to the utlity model has two-sided indicating effect, then can load onto index plate 15, pointer 14 at another side by above-mentioned fit.

The base portion of the tooth bar 10 of indicating device of the present utility model is connected with the bearing frame 7 of weighing device, two ends of bearing frame 7 connect the lower end of two metering springs 6 respectively, the upper end of two metering springs 6 is detained respectively and is hung in two holes on the suspension hook 5, two suspension hooks 5 are connected to two ends of the micropositioning stage 4 of trimming zero position device, and the middle part of micropositioning stage 4 is connected with micrometer adjusting screw 2.Micrometer adjusting screw 2 is passed shell 18 respectively, support upper plate 3 backs screw in the middle part of micropositioning stage 4, the effect of micrometer adjusting screw 4 has been the corrective actions of zero-bit trace, when left-handed or dextrorotation micrometer adjusting screw 2, just can make micropositioning stage 4 do trace on, following motion, at this moment hang over the contraction of the metering spring 6 on the suspension hook 5 or elongation along with button and drive bearing frame 7 do trace on carry or drop, because the base portion and the bearing frame 7 of tooth bar 10 are riveted together, thereby along with carrying on the bearing frame 7 or dropping, on the just corresponding work of tooth bar 10, under trace movement and drive and its meshed gears 11 is made trace and rotated, thereby gear shaft 19 is turned an angle, at this moment pointer 14 is also corresponding turns an angle, and has realized just when pointer 14 correctly is instructed in zero-bit on the index plate 15 that when turning to zero-bit adjusts for trace.The suspension ring 1 of weighing device of the present utility model reach and the fixedlying connected of shell 18 and support upper plate 3 by screw 20; Claim thing hook 9 to be connected with bearing frame 7; One end of two damping springs 8 is buckled respectively in the hole that hangs on the bearing frame 7 symmetrically, and other end button hangs in the pair of holes on the support lower plate 21.When weighed object is put or take off, reduce initial force and bearing frame 7 is flatly moved up and down owing to its effect makes metering spring 6.

The base portion of the tooth bar 10 of indicating device of the present utility model is connected with tooth bar spring 13.Open a spring eye at the base portion of tooth bar 10, button is mentioned an end of bar spring 13 in the hole, and the other end of tooth bar spring 13 is buckled in the hole that hangs on the bearing frame 7.The effect of tooth bar spring 13 is that assurance tooth bar 10 is combined closely with gear 11 under work or off working state all the time, and promptly fully engagement occurs indicating malfunctioning to prevent mutual drop out of gear.

The effect of face shield 17 of the present utility model is that unlikely other object brushes up against pointer 14 and guarantees that the card of index plate 15 cleans.For guaranteeing that pointer 14 unlikely grazing index plates 15 influence indication, when assembling pointer 14, add packing ring 16, leave suitable space between pointer 14 and the index plate thereby make.

In the time will claiming thing, to hold suspension ring 1, by claiming thing hook 9 weighed object is mentioned, at this moment, bearing frame 7 is because of gravitate drops, and meanwhile, metering spring 6 is stressed and extend, at this moment, tooth bar 10 just moves down, thereby has driven the rotation with its meshed gears 11, is rotated by gear 11 driven gear axles 19, rotation along with gear shaft 19, make the pointer 14 that is installed on this produce angular displacement,, that is to say that the weight of weighed object is directly proportional with the tensile elongation of metering spring 6 because this process is constant, on tooth bar 10, following movement length is directly proportional, also promptly with gear 10, gear shaft 19, the angular displacement of pointer 14 is directly proportional.The angular displacement degree of pointer 14 is to represent by the number of divisions of its indication on index plate 15, thereby reaches final weighing indication.After the quilt on the title thing hook 9 claims that thing unloads, bearing frame 7 is because of agravic and be returned to original position under the contraction of metering spring 6, meanwhile, tooth bar 10, gear 11, gear shaft 19, the also corresponding origin-location that returns back to of pointer 14, pointer 14 at this moment refers on the zero-bit of index plate 15.

The utility model has been owing to done above-mentioned improvement, have simple in structure, can not occur in weighing process having judged by accident, having guaranteed that the parts of indicating device rationally are provided with, can occur indicating advantages such as malfunctioning.

Claims

1, a kind of portable spring dial scale is characterized in that it comprises by suspension ring (1), claims the weighing device that thing hook (9), damping spring (8), bearing frame (7), metering spring (6) are formed; The indicating device of forming by tooth bar (10), gear (11), index plate (15) and pointer (14); The card of forming by face shield (17), shell (18); The trimming zero position device of forming by micrometer adjusting screw (2), micropositioning stage (4); The assembly bracket of all parts that indicating device can be set that in housing (18), are provided with.

2, portable spring dial scale according to claim 1, it is characterized in that assembly bracket is made up of rack body (22), support upper plate (3), support lower plate (21), the upper and lower plate of support (3), (21) respectively with the upper and lower end integral production of rack body (22) and fixing with shell (18) respectively.

3, portable spring dial scale according to claim 2 is characterized in that the middle part of rack body (22) is provided with gear fixed mount (12), offers groove and axis hole on it respectively.

4, portable spring dial scale according to claim 1 is characterized in that the base portion of the tooth bar (10) of indicating device is connected with tooth bar spring (13).