CN2735320Y

CN2735320Y - Barometric altimeter

Info

Publication number: CN2735320Y
Application number: CN 200420061672
Authority: CN
Inventors: 肖传良; 廖蓉; 张伟
Original assignee: SICHUAN XIGUANG INDUSTRY (GROUP) Co Ltd
Current assignee: SICHUAN XIGUANG INDUSTRY (GROUP) Co Ltd
Priority date: 2004-10-18
Filing date: 2004-10-18
Publication date: 2005-10-19
Anticipated expiration: 2014-10-18

Abstract

The utility model relates to a barometric altimeter which belongs to the pointer type machinery barometer. The barometric altimeter comprises a casing, a sylphon, a mechanical actuating mechanism, a pointer arranged at a central shaft and a barometric scale. In the mechanical actuating mechanism, the riser top of a contact chip contacts with the sylphon and the bottom board of the contact chip is hinged in a lever. A lever shaft is movably sheathed with the holes of the two risers of the lever. The flank of the riser of the contact chip contacts with the lever shaft. The riser, which is far from the contact chip, of the lever is provided with a pivot journal which is blocked between the two upright columns of an arced gear. The gear which is meshed with the arced gear is arranged on the central shaft. A backspin balance spring is coiled on the central shaft, with the outer end of the backspin balance spring fixed on the casing. The utility model adopts three stages of mechanical enlargement drive with a magnification trimming mechanism. The barometric altimeter has high magnification factors to the shape change of the sylphon and has the advantages of simple and compact structure, high sensibility, and high measuring precision.

Description

Barometric altimeter

One, technical field

The utility model relates to the pressure test instrument, and particularly pointer mechanical barometer is made the field.

Two, background technology

Being used for the open air revolves trip and meteorological fan's barostat and mainly contains the electronic type barometer (as patent ZL93240636 " handheld digital demonstration barometer " mainly by shell, baroceptor, compositions such as internal circuit and air pressure digital indicator) and mechanical type barometer two big classes.At present, electronic type barometer accurate measurement, but general cost is higher; The mechanical type barometer is sensor usually with the bellows, adopts mechanical transmission mechanism, and the miniature deformation amplification with bellows finally makes the needle deflection that is fixed on the central shaft, and indicate barometer reading on the baroscale dish.As, Chinese patent literature discloses a kind of " barometer movement " (ZL01257853), and it belongs to pointer mechanical barometer.Its mechanical transmission mechanism mainly is made up of rotating shaft, drive link, push rod, fork, gear shaft etc.: the push rod bottom is leaned on mutually with the tympanites upper end, fork is housed in the rotating shaft, fork and gear shaft engagement, two orthogonal dead mans on the drive link ride over respectively on the top pawl on fork and push rod top.The parts of its gear train are more, and structure is comparatively complicated, and it is steady that transmission is owed.

Three, utility model content

The purpose of this utility model provides a kind of simple structure, stable drive, highly sensitive barometric altimeter.This novel purpose realizes like this: a kind of barometric altimeter, comprise housing, bellows, mechanical transmission mechanism, be installed in the pointer on the central shaft, the baroscale dish, it is characterized in that, described mechanical transmission mechanism is: the riser top of contact chip contacts with described bellows, and the base plate of contact chip is hinged and is shouldering on the bar, shoulders in the hole that the bar axle is set on two risers of shouldering bar versatilely, the riser side of contact chip with shoulder bar and be coupling and touch, that shoulders bar is fixed with a joint from contact chip riser far away, and joint is stuck between two columns on the arc gear wheel, is installed on the described central shaft with the arc gear wheel meshed gears; Counter offer is wound with the widely different hairspring that revolves on the central shaft, and the widely different hairspring outer end of revolving is fixed on the described housing.

From above-mentioned design analysis, this novel gearing is that three grades of machineries amplify transmission, when bellows has deformation output, the bar of shouldering of the first order amplifies deformation and is sent to partial arc gear wheel, arc gear wheel is realized second level amplification transmission to the arm of force and the rotation axis of the rotation axis of arc gear wheel to the arm of force of arc gear wheel reference circle by shouldering bar contact point (contact points on joint and the arc gear wheel between two columns) again, at last, realize third level amplification transmission by the gear on arc gear wheel and the central shaft.And basis is novel to be provided with multiplying power micro-adjusting mechanism one contact chip in the first order is amplified, when bellows has deformation output, contact chip is being shouldered pin joint deflection on the bar around it, and stir and shoulder the bar axle, it has adapted to the output discreteness of bellows sensor, has improved the yield rate of product.The widely different hairspring that revolves on the central shaft is a multifunctional part, it makes the central shaft can smooth rotation, and eliminated gap between transmission gear, also for whole drive system provides the power that fits tightly bellows, guarantee that the deformation of whole drive system and bellows is consistent simultaneously.

Compare with existing machinery formula barometer, this is novel to have following characteristics:

1, total system is through optimal design, and parts are few, and are simple and compact for structure, conceive more ingenious.

2, three grades of machineries of this novel employing amplify transmission, the multiplying power micro-adjusting mechanism, and to the enlargement factor height of bellows deformation, sensitivity is higher, and measuring accuracy is better.

3, the widely different hairspring that revolves of this novel employing makes the transmission of whole gear train more steady, can guarantee that whole drive system remains consistent with the deformation of bellows.

Four, description of drawings

Fig. 1 is this novel front view;

Fig. 2 is the schematic perspective view of this new mechanical gear train;

Fig. 3 is arc gear wheel and the widely different scheme of installation that revolves hairspring;

Fig. 4 is the schematic perspective view of bellows and mechanical transmission mechanism shown in Figure 2.

Five, embodiment

Fig. 1 illustrates, and baroscale dish 2 and altitude scale dish 1 and pointer 3 are housed on the panel of this new hull.Among Fig. 2 Fig. 3 Fig. 4, this novel mechanical gear train is: contact chip 7 is made up of a circular bottom plate and a riser, the riser top of contact chip contacts with bellows 13, the base plate of contact chip is hinged versatilely through rivet 7a and is shouldering on the bar 4, shoulder in the hole that bar axle 8 is set on two risers of shouldering bar versatilely, the riser side of contact chip with shoulder bar and be coupling and touch, that shoulders bar is fixed with a joint 9 on contact chip riser far away, joint is stuck between two column 5a, the 5b on the arc gear wheel 5, gear 10 is installed on the central shaft 6, gear and arc gear wheel 5 engagements.Pointer 3 shown in Figure 1 is installed on the central shaft 6, is linked on the central shaft 6 to altitude scale disk activity shown in Figure 1.The widely different hairspring 11 that revolves is coiled on the central shaft 6, and its outer end is fixed on (the widely different hairspring outer end of revolving is fixed on the lower tooth wheel plate 12 among Fig. 3, and lower tooth wheel plate 12 is fixed on the barometer housing again) on the housing.Fig. 3 illustrates, and the rotation axis of arc gear wheel is installed on the lower tooth wheel plate 12.

Indication pin type thermometer and north arrow and small mirror (temperature pin and north arrow can be installed on the housing bottom surface, and small mirror can be installed on the housing side) also are installed on this new hull.This is novel to be outdoor barometric altimeter, is a kind of air pressure determinator.It adopts three grades of machineries to amplify, and drives pointer, the indication atmospheric pressure value, and simultaneously by pointer indicated altitude value (conversing height value according to atmospheric pressure value).And, thermometer, north arrow, small mirror are combined the multinomial function that has indicated temperature, direction concurrently and look in the mirror.

The accurate plastic gear of little modulus is adopted in this novel gear drive, rotates flexibly, and the gap is little.

Hairspring 11 is coiled on the central shaft 6, when air pressure change, bellows drives central gear through running part, hairspring 11 rotates and produces certain rotating force, eliminated the gap in the gear train, also for whole drive system provides the power that fits tightly bellows, guarantee that the deformation of whole driving force system and bellows is consistent simultaneously.When air pressure was replied, under the effect of hairspring 11 rotating forces, pointer 3 was returned to initial value, made gear train keep closely contacting with bellows 13 simultaneously.

With nonlinear baroscale dish 2, make indicated value more accurate.Outer periphery at the baroscale dish is equipped with the altitude scale dish 1 that can adjust simultaneously, and altitude scale dish 1 can be that rotate at the center with the central shaft, has realized the measurement of sea level elevation and relative height.Measuring method is: under the prerequisite of known current location sea level elevation, adjust altitude scale dish 1, make the current sea level elevation of pointed, after air pressure changes, pointer 3 will point to new air pressure number, also point to new sea level elevation simultaneously; In like manner, when surveying relative height, only need the zero-bit of altitude scale dish 1 is aimed at pointer 3, after air pressure changed, the height of indication was the height of relative original position.

The utility model process optimal design, the simple structure precision, complete function practicality, design are relatively more exquisite.Product is elegant in appearance in appearance, and the collocation of color and lines are more simple rough, conforms to the style of outdoor exercises.

Claims

1, a kind of barometric altimeter, comprise housing, bellows, mechanical transmission mechanism, be installed in the pointer on the central shaft, the baroscale dish, it is characterized in that, described mechanical transmission mechanism is: the riser top of contact chip (7) contacts with described bellows (13), and the base plate of contact chip is hinged and is shouldering on the bar (4), shoulders in the hole that bar axle (8) is set on two risers of shouldering bar versatilely, the riser side of contact chip with shoulder bar and be coupling and touch, that shoulders bar is fixed with a joint (9) on contact chip (7) riser far away, joint is stuck in two column (5a on the arc gear wheel (5), 5b), be installed on the described central shaft (6) with arc gear wheel meshed gears (10); Central shaft (6) is gone up counter offer and is wound with the widely different hairspring (11) that revolves, and the widely different hairspring outer end of revolving is fixed on the described housing.

2, altitude gauge according to claim 1 is characterized in that, described contact chip (7) is through rivet (7a) and shoulder bar (4) hinge.

3, altitude gauge according to claim 1 and 2 is characterized in that, also has the altitude scale dish (1) that is linked in versatilely on the central shaft (6).

4, altitude gauge according to claim 3 is characterized in that, on the described housing north arrow is installed.

5, altitude gauge according to claim 4 is characterized in that, on the described housing dial thermometer is installed.

6, root p is characterized in that according to the described altitude gauge of claim 5, on the described housing small mirror is installed.