CN2384206Y

CN2384206Y - Mechanical enlarging double-display spring dial balance

Info

Publication number: CN2384206Y
Application number: CN 99229077
Authority: CN
Inventors: 岳光法
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-05
Filing date: 1999-08-05
Publication date: 2000-06-21
Anticipated expiration: 2009-08-05

Abstract

The utility model discloses a mechanical enlarging double-display spring dial balance which is a weighing device for weighing. The utility model is suitable for weighting in the household or the commercial purpose. The spring dial balance is composed of a casing, a graduated dial, and an inner core. The inner core is mainly composed of a drive gear, a rack gear, a rotary shaft, a mechanical enlarging gear, a pointer gear, and a pointer. The drive gear and the mechanical enlarging gear are fixed on the rotary shaft; the drive gear and the mechanical enlarging gear are respectively positioned at both sides of a supporting frame plate; the drive gear is positioned between a bottom plate and the supporting frame plate; the mechanical enlarging gear is positioned at the outside of the supporting frame plate; the pointer gear is installed on a fixed shaft on the supporting frame plate and the pointer gear is engaged with the mechanical enlarging gear; the pointer is fixed on the pointer gear and the drive gear is engaged with the rack gear; the rack gear is connected with a draw rod.

Description

Machinery amplifies two spring scale scales that show

The utility model is a kind of weighing apparatus that is used to weigh, in particular for family or commercial metering of weighing.

Spring balance technology maturation has two kinds, and a kind of is to adopt single spring stress effect to produce distortion to make dynamometer, is the scale spring balance as weighing; It is another kind of that to adopt dual spring be sensing element, the rack drives that the distortion of action of gravity lower spring is moved by the center straight line and the rotation of tooth bar meshed gears, and pointer is the spring scale scale also along with rotation by what the pointer scale was weighed on the gear shaft.The scale spring balance, simple in structure, but because of adopting a spring, longer dimension, reading inconvenience, precision is not high; The spring scale scale adopts dual spring, suspended structure, maximum capacity hour, convenient reading, precision is higher, maximum is weighed when big, resolution is not high, precision is poor slightly.Precision does not reach commercial measuring requirement, can only be as household supplies.

Some technology attempts to improve spring balance resolution in addition, by increasing spring length, enlarges the scale diameter, causes scale physical dimension to increase; Make precision by improving, take temperature compensation to improve precision and repeatability, but cost is higher.Take turns the two pointers of big decimal by double rack, bidentate and show, but have reliability, problem such as two pointers are synchronous fails to be employed.

It is little that goal of the invention of the present utility model just provides a kind of volume, convenient reading, and the machinery that precision is high amplifies two spring scale scales that show.

Machinery of the present utility model amplifies two spring scale scales that show mainly by shell, scale and inner core are formed, the inner core part is mainly by driving gear, tooth bar, rotating shaft, machinery amplifies gear, pointer gear and pointer are formed, driving gear, and machinery amplifies the both sides that gear is fixed in the rotating shaft and lays respectively at supporting plate, driving gear is between base plate and supporting plate, machinery amplifies the outside that gear is positioned at supporting plate, and pointer gear is contained on the stationary shaft on the supporting plate and with machinery and amplifies gearing mesh, and pointer is fixed on the pointer gear, the driving tooth wheel and rack is meshed, and tooth bar is connected with pull bar.Amplify the gear outside at machinery and also be provided with dial, also be provided with digital displaying window on scale, the numeral on this window aligned number letter disk forms a digital displaying window, two display structures of a pointer indication.In addition also can be without digital displaying window, and rotating shaft is passed scale and fixed a little pointer in the end of rotating shaft, the structure that two pointers show formed.

Advantage of the present utility model is:

1. precision height: because the structure that has adopted register ratio to amplify makes reading more accurate, and good reproducibility, be not only applicable to family, applicable to commerce yet.

2. convenient reading: adopt two structures that show, window or little finger of toe pin show kilogram, and big pointer shows gram, therefore not only show accurately, and reading are convenient.

3. volume is little: the spring balance of this structure does not increase volume because of the increase of function, and its volume is the same with original various springs and manufacture craft is simple.

4. maximum capacity is big, resolution height (5 gram), and cost is low.

5. antifalsification is good.

Fig. 1 is that the utility model shows the kilogram number by window, is shown the appearance structure synoptic diagram of gram number by pointer.

Fig. 2 is that the utility model shows the kilogram number by the little finger of toe pin, is shown the appearance structure synoptic diagram of gram number by big pointer.

Fig. 3 is a core arrangement synoptic diagram of the present utility model, comprising supporting plate 1, and stationary shaft 2, pointer gear 3, pointer 4, rotating shaft 5, driving gear 6, machinery amplifies gear 7, scale 8, digital displaying window 81, dial 9, tooth bar 10, pull bar 11, base plate 12.

Embodiment of the present utility model is as follows:

At first make shell of the present utility model with the method for injection moulding, utilize the base plate 12 of the base plate of shell as inner core, driving gear 6 is fixed in the rotating shaft 5, the other end of rotating shaft passes supporting plate 1 and the fixing machinery of going up amplifies gear 7, pointer gear 3 also is being housed on stationary shaft 2 on the supporting plate, pointer gear 3 amplifies gear 7 with machinery and is meshed, on pointer gear 3, go back fixed pointers 4, the outside surface that amplifies gear at machinery promptly posts dial 9 by a side of scale 8, have the digital displaying window 81 that to see numeral on the dial on the surface of scale 8, at last, supporting plate 1 is fixed on the base plate and with driving gear 6 is meshed with tooth bar 10, pull bar 11 is connected with tooth bar, and weighing spring is connected with pull bar by common spring balance hitch, scale 8 is contained in the front of scale, has promptly formed the utility model.Also the digital displaying window on the scale can be removed, increase a little scale, passed scale 8 and fixed a little pointer by rotating shaft 5, this little pointer cooperates with little scale for reading the numeral of kilogram, and big pointer reads the numeral of gram.

Claims

1. a machinery amplifies two spring scale scales that show by shell, scale and inner core are formed, it is characterized in that the inner core part is mainly by driving gear (6), tooth bar (10), rotating shaft (5), machinery amplifies gear (7), pointer gear (3) and pointer (4) are formed, driving gear (6), machinery amplifies gear (7) and is fixed on the both sides that supporting plate (1) was gone up and laid respectively in rotating shaft (5), driving gear (6) is positioned between base plate (12) and the supporting plate (1), machinery amplifies the outside that gear is positioned at supporting plate (1), the stationary shaft (2) that pointer gear (3) is contained on the supporting plate (1) is gone up and is meshed with machinery amplification gear (7), pointer (4) is fixed on the pointer gear (3), and driving gear (6) is meshed with tooth bar (10), and tooth bar is connected with pull bar (11).

2. machinery according to claim 1 amplifies two spring scale scales that show, it is characterized in that amplifying gear (7) outside at machinery also is provided with dial (9), on scale (8), also be provided with digital displaying window (81), the numeral on this window aligned number letter disk (9).

3. machinery according to claim 1 amplifies two spring scale scales that show, it is characterized in that rotating shaft (5) passes scale (8) and fix a little pointer in the end of rotating shaft (5), forms the structure that two pointers show.