CN105953886A

CN105953886A - Dual-order and dual-precision weighting sensor with adjustment mechanism

Info

Publication number: CN105953886A
Application number: CN201610096140.2A
Authority: CN
Inventors: 申俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-20
Filing date: 2016-01-20
Publication date: 2016-09-21

Abstract

The present invention discloses a dual-order and dual-precision weighting sensor with an adjustment mechanism. The sensor comprises a soleplate, a first precision weighting sensor, a second precision weighting sensor, a support leg, an elastic supporting piece and an adjustment mechanism configured to adjust the height of the elastic supporting piece; the soleplate is provided with an installation plate potion and a guiding force support part configured to transmit the pressured to the installation plate portion; the elastic supporting piece, the first precision weighting sensor, the installation plate portion, the second precision weighting sensor and the support leg are arranged in crimping state in order; and the top end of the elastic supporting piece at the free state is higher than the top end of the guiding force support part, and the top end of the elastic supporting piece is moved downwards when being forced and stressed. The dual-order and dual-precision weighting sensor with the adjustment mechanism has dual-step continuous measuring range and has different precision values in each-step range.

Description

A kind of double rank double precision LOAD CELLS with governor motion

Technical field

The invention belongs to load cell structure design field, be specifically related to a kind of double essence in double rank with governor motion Degree LOAD CELLS.

Background technology

Body weight electronic scale in the market, its structure mainly includes support board, display screen, regulation button, power module With the LOAD CELLS composition for supporting support board, its function is mainly used in human body of weighing, and is usually when carrying object After weight exceedes preset value, display screen just starts to show numerical value, and this preset value is usually 5 kilograms；It addition, this kind of body weight The maximum range of electronic scale is usually 180 kilograms, and accuracy value only has 100 grams, and error is relatively big, so this traditional body Weight electronic balancer, on ordinary days in addition to weighing in, substantially cannot function as its use, especially cannot be used for as electronic scale With.And existing electronic scale, its accuracy value can reach 1 gram the least, but its range is usually no more than 10 Kilogram, use so cannot function as scale.

Summary of the invention

It is an object of the invention to provide a kind of tool that there is the continuous range in double rank and there is in the range of each rank different accuracy value There is double rank double precision LOAD CELLS of governor motion.

The technical scheme realizing the object of the invention is: a kind of double rank double precision LOAD CELLS with governor motion, including Mounting seat, the first precision LOAD CELLS, the second precision LOAD CELLS and a spike；It is characterized in that: also include bullet Property supporting member and governor motion；Described mounting seat is provided with mounting plate portion and for self pressure is passed to mounting plate portion Power of leading support；Elastic supporting piece, the first precision LOAD CELLS, mounting plate portion, the second precision LOAD CELLS, Prop up spike and crimp setting successively；Elastic supporting piece includes upper supporting part, spring and lower supporting part；The upper end of spring is connected to On upper supporting part, the lower end of spring is connected on lower supporting part, and lower supporting part crimping is arranged on the first precision LOAD CELLS On；The top of lower supporting part is provided with annular spacing groove and is positioned at the regulation screw of annular spacing groove center；Upper supporting part Diapire be provided with the annular adaptive with leading power support lead power pressure contact portion, downward projection of for spring upper end is carried out spacing Positive stop lug boss and be positioned at the regulation slide opening of positive stop lug boss center；Spring upper end is set on this positive stop lug boss periphery wall, And apical grafting is on the diapire of upper supporting part；Described governor motion includes regulating screw；Described regulation slide opening is stepped hole, from On be the bigger less slide opening district of crimping porose area and aperture, aperture the most successively, the diapire of crimping porose area as electrolysis, Slide opening district is smooth circular hole；Described regulation screw is sequentially provided with the portion of screwing, traveller portion from top to bottom and fits with regulation screw The spiro union portion joined；Described spiro union portion is spirally connected in the regulation screw being fixed on lower supporting part, during free state, on the top of spring Under pressure effect, the portion of screwing is positioned in crimping porose area, and the bottom screwing portion is crimped on the diapire of crimping porose area, Ye Jisuo State on electrolysis；Traveller portion is then positioned in slide opening district；Under external force, described upper supporting part can be at regulation screw traveller Slide up and down under the guide effect in portion.

In such scheme, the range of the first precision LOAD CELLS is less than the range of the second precision LOAD CELLS.

When the present invention weighs in the first rank range, namely the power pressure contact portion of leading not yet is displaced downwardly to be crimped on and leads on power support Time, although the first precision LOAD CELLS and the second precision LOAD CELLS stress simultaneously, but the first precision can be utilized to claim The independent check weighing of weight sensor, namely externally connected with display screen only shows the data that the first precision LOAD CELLS measures, its accuracy value Being the accuracy value of the first precision LOAD CELLS, general use higher precision, such as accuracy value is 1 gram or less； When weighing in the second range, namely lead to defeat and meet subordinate and move to be crimped on when leading on power support, although the first precision claims Weight sensor and the second precision LOAD CELLS stress simultaneously, but the second independent check weighing of precision LOAD CELLS can be utilized, Namely externally connected with display screen only shows the data that the second precision LOAD CELLS measures, its accuracy value is the second precision weighing and sensing The accuracy value of device, general uses relatively low precision, and such as accuracy value is 100 grams or bigger；It addition, the present invention is When weighing in second order range ability, now leading to defeat meeting subordinate and move to be crimped on and lead on power support, spring deformation no longer increases Add, namely the pressure being applied on the first precision LOAD CELLS is not further added by, thus effectively protect the first precision to weigh biography Sensor so that it is will not damage because load is overweight；Additionally, the present invention by select spring as the core of elastic supporting piece, Can make to lead power pressure contact portion by selecting suitable spring and lead there is between power support suitable clearance distance, can Reduce mounting seat and the requirement on machining accuracy of elastic supporting piece, can guarantee that again comfort during use.

Accompanying drawing explanation

Fig. 1 is that the present invention is in the first rank range and weighs a kind of structural representation of state；

Fig. 2 is that double rank double precision LOAD CELLS shown in Fig. 1 are in second-order range and weigh a kind of structural representation of state；

Fig. 3 is a kind of structural representation when upper supporting part and regulation screw association in double rank double precision LOAD CELLS shown in Fig. 1 Figure；

Fig. 4 is a kind of perspective view on double rank double precision LOAD CELLS shown in Fig. 1；

Fig. 5 is a kind of explosive view on double rank double precision LOAD CELLS shown in Fig. 1；

Fig. 6 is a kind of explosive views when another angle is observed of double rank double precision LOAD CELLS shown in Fig. 1.

Detailed description of the invention

(embodiment 1)

The present embodiment is a kind of double rank double precision LOAD CELLS with governor motion, as shown in Fig. 1 to Fig. 6, including Mounting seat the 1, first precision LOAD CELLS the 2, second precision LOAD CELLS 3, spike 4, elastic supporting piece 5 and For regulating the governor motion 6 of elastic supporting piece height.

Described mounting seat is provided with mounting plate portion 11 and for self pressure being passed to power of the leading support of mounting plate portion 12；Elastic supporting piece, the first precision LOAD CELLS, mounting plate portion, the second precision LOAD CELLS, a spike are successively Crimping is arranged.

Mounting plate portion is horizontally disposed with, and the roof of mounting plate portion is provided with the first deck, and diapire is provided with the second deck.First The existence of deck and the second deck is so that the installation of the first precision LOAD CELLS and the second precision LOAD CELLS is grasped Make more rapid and convenient.Power of the leading support 12 of mounting seat is the annular boss projecting upwards formation from mounting plate portion, institute State the first deck, the first precision LOAD CELLS and elastic supporting piece to be arranged in the cavity 121 that this annular boss surrounds. This structure makes to lead power support and elastic supporting piece and the first precision LOAD CELLS can be trapped among wherein, props up elasticity Bearing member and the first precision LOAD CELLS have certain protective effect so that it is be not easily susceptible to extraneous factor interference.

In the present embodiment, the first precision force cell is LOAD CELLS for kitchen use, and its range is 0 to 5 kilogram, essence Angle value can reach 1 gram；This first precision LOAD CELLS is provided with first fixed part the 21, first load deformations 22 and The first resistance strain gage 23 for detecting the first load deformations deflection being arranged in the first load deformations；Specifically For, the shape of described first fixed part be by four edges combination formed rectangular box-like, the shape of the first load deformations It is to be combined " mountain " font formed, the first load deformation by a base and three straight flanges arranging with this base vertical Portion is arranged in the rectangle frame of the first fixed part, the end of the center straight flange in three straight flanges of described first load deformations It is connected with the inner side edge wall of a frame middle-end of the first fixed part.Described first fixed part is fixed on the first deck In；First load deformations exceeds described mounting plate portion, for its deformation slot milling.This first precision LOAD CELLS Planform is relatively reasonable, it is easy to by impact style processing and manufacturing, and cost is relatively low.

When being used for manufacturing electronic scale, it is generally required to the double rank double precision LOAD CELLS described in four the present embodiment, namely The scope of weighing of the first rank range of the electronic scale that employing the present embodiment is made is 0 to 20 kilogram, can meet daily little The demand that object is weighed.But for the present embodiment, due to only one of which the first precision LOAD CELLS, its first rank Range is 0 to 5 kilogram.

Elastic supporting piece includes upper supporting part 51, spring 52 and lower supporting part 53；The upper end of spring is connected to upper supporting part On, the lower end of spring is connected on lower supporting part, and lower supporting part crimping is arranged on the first precision LOAD CELLS.Specifically For, lower supporting part crimping is arranged in the first load deformations, the first fixed part be installed on mounting plate portion roof the On one deck, and crimping is arranged in mounting plate portion.The top 50 of elastic supporting piece in free state namely is not stressed Time exceed the top 120 leading power support, move down during the top pressure-bearing stress of the top of elastic supporting piece namely upper supporting part. This structure is by arranging upper supporting part, spring and lower supporting part split, it is simple to processing and manufacturing and maintenance are changed.

In the present embodiment, lower supporting part is fixedly installed in the first load deformations by screw connection manner.First load deformation Portion is provided with two the first fastener holes 221；The bottom of lower supporting part is provided with by two the first screws 222 first tight with this Gu two fastening screws 531 that hole is fastenedly connected.Specifically, being positioned in described three straight flanges of first load deformations Two straight flanges of straight flange both sides, center, are respectively provided with first fastener hole 221.This structure is by direct lower supporting part It is fixedly installed in the first load deformations of the first precision LOAD CELLS, crimps the first load shape realizing lower supporting part While change portion, also utilizing the first load deformations directly to position lower supporting part, its structure more simplifies rationally.

In concrete practice, it is possible to by anchor mode, lower supporting part is fixed on the first precision LOAD CELLS, such as The diapire of lower supporting part arranges two downwardly projecting anchor boss, the first load deformations arranges two anchors Hole, each boss that is anchored passes anchor process after a corresponding anchor hole, and this mode is also effective and feasible.

The top of lower supporting part is provided with annular spacing groove 532 and is positioned at the regulation screw 534 of annular spacing groove center；On The diapire of supporting member is provided with the annular adaptive with leading power support and leads power pressure contact portion 511, slightly downward prominent for right Spring upper end carries out spacing positive stop lug boss 515 and is positioned at the regulation slide opening 516 of positive stop lug boss 515 center；On spring End is set on this positive stop lug boss 515 periphery wall, and apical grafting is on the diapire of upper supporting part, and the leading to defeat of upper supporting part connects Portion 511 is provided with and leads the annular groove that power support top is adaptive.

Described governor motion includes regulating screw 63；Described regulation slide opening is stepped hole, is that aperture is bigger the most successively The less slide opening district 5162 of crimping porose area 5161 and aperture, the diapire of crimping porose area is as electrolysis 5163, slide opening district 5162 is smooth circular hole；Described regulation screw be sequentially provided with from top to bottom the portion of screwing 631, traveller portion 632 and with regulation The spiro union portion 633 of screw 534 adaptation；Described spiro union portion 633 is spirally connected in the regulation screw 534 being fixed on lower supporting part, During free state, under the top pressure effect of spring 52, screw portion 631 and be positioned in crimping porose area 5161, and screw portion Bottom is crimped on the diapire of crimping porose area 5161, namely on described electrolysis 5163；Traveller portion 632 is then positioned at slide opening In district 5162；Under external force, described upper supporting part can under the guide effect in regulation screw traveller portion 632 up and down Slide.This structure connects upper supporting part and lower supporting part by using regulation screw so that it is become an entirety so that Upper supporting part and spring are difficult to lose；Simultaneously by this regulation screw of turn, can directly adjust leading of upper supporting part and defeat Connect the clearance distance between power of the leading support of portion and mounting seat；This structure comparison compact and reasonable.

The advantage of governor motion is: in concrete practice, and in elastic component, the concordance of spring 52 is difficult to ensure that, due to Weighing scale and kitchen scale typically can use four double rank double precision LOAD CELLSs simultaneously, and the spring that concordance is difficult to ensure that will The height that can cause four LOAD CELLSs is slightly distinguished, and impact assembles and uses, and even picks up electronic scale when user and sees When examining, the most at grade, pole is unsightly in the bottom of each spike；The present embodiment uses governor motion to adjust elasticity The whole height of bearing member, even if so that the present embodiment uses the slightly larger spring of error, also has only to regulation gland rotation Forward position to, the concordance of whole height can be ensured.Prevent from regulating gland it addition, the effect of elastomeric pad here is not only Loosen, it is also possible to by selecting the elastomeric pad of differing heights to adjust whole height, or the leading of regulation upper supporting part Gap between power of the leading support of power pressure contact portion and mounting seat, with the demand under satisfied different occasions.

It addition, the present embodiment also can arrange static contact leading power support top, power of the leading pressure contact portion at upper supporting part is arranged The moving contact adaptive with this static contact；When this lead power pressure contact portion be crimped on lead on power support time, moving contact crimping be arranged on On static contact, both realize electrical connection.In concrete practice, when moving contact and static contact electrical contact, produce a telecommunications Number give be connected external central control circuit, when central control circuit receives this signal, show second on a display screen The data that precision LOAD CELLS measures；When central control circuit does not receives this signal, show first on a display screen The data that precision LOAD CELLS measures；In other words, combine can be as display screen video data for this dynamic/static contact Automatically the signal switch of conversion.In concrete practice, also can use other structure, for example with tongue tube, close Switches etc. replace the combination of this dynamic/static contact.

This structure takes full advantage of the performance advantage of spring, by selecting suitable spring, so that during free state, Upper supporting part is led the gap on power pressure contact portion 511 and power of the leading support top 120 of mounting seat and is in suitably sized, typically Preferably 1 millimeter to 5 millimeters, preferably preferred size is 2 millimeters to 3 millimeters, and excessive gap can weigh at human body Time significantly fall sense to people because power of leading pressure contact portion now have to be displaced downwardly to be crimped on lead on power support, namely Move down whole above-mentioned gap size；Too small gap may require that higher machining accuracy, improves technology difficulty and manufacturing cost.

Mounting seat is additionally provided with in the lower section of mounting plate portion and encloses the holding part 13 forming containing cavity 131, this holding part and installation Plate portion is made into integration, and the second precision LOAD CELLS and a spike are arranged in this containing cavity, and the bottom of a spike is the most downward Stretch out this containing cavity.The advantage of this structure is to protect the second precision LOAD CELLS and a spike, anti- Only it is disturbed by extraneous factor.The present embodiment is to be formed integrally part leading power support, mounting plate portion and holding part, In concrete practice, it is possible to it is each made split part, is finally assemblied at together, be also feasible.

In the present embodiment, the second precision LOAD CELLS is human body weighing's sensor, and its range is 0 kilogram to 50 kilograms, Accuracy value is 100 grams；Second precision LOAD CELLS is provided with second fixed part the 31, second load deformations 32 and sets Put the second resistance strain gage 33 for detecting the second load deformations deflection in the second load deformations.It is being used for When manufacturing electronic scale, it is generally required to the double rank double precision LOAD CELLS described in four the present embodiment, namely use this enforcement The scope of weighing of the second-order range of the electronic scale that example is made is 0 to 200 kilogram, can meet the demand of human body weighing. But for the present embodiment, due to only one of which the second precision LOAD CELLS, its second-order range is 5 to 50 thousand Gram.

In the present embodiment, the shape of the second precision LOAD CELLS is similar to instead " G " font, and its second fixed part approximates " C " font, the shape of the second load deformations is similar to less " C " font, and with the second fixed part phase Even, combination forms anti-" G " font.The first precision LOAD CELLS in the present embodiment and the second precision LOAD CELLS It is suitable for, by impact style processing and manufacturing, advantageously reducing manufacturing cost.

Second fixed part is installed in the second deck on mounting plate portion diapire, and the second load deformations is less than described installing plate Portion, for its deformation slot milling, the second load deformations crimping simultaneously is arranged on the top of a spike.

In the present embodiment, the first precision LOAD CELLS used and the second precision LOAD CELLS may be used without the most widely Circulation and the cheapest force cell of price, thus effectively reduce manufacturing cost.

In the present embodiment, the basic configuration of a spike is cylindric, and its bottom is provided with rubber slipmat 41.

In the present embodiment, being provided with containing cavity bottom opening at holding part bottom center, this opening part is provided with for blocking accommodating The capping 15 of chamber bottom opening；Capping includes that interior cover region 152, outer cover region 153 and the interior cover region of connection and outer cover region are many Bar spiral elastic arm 154, is provided with center hole 151 at inner cap district center；The bottom propping up spike extends downwardly from the center of capping Circular hole, and the inwall of the periphery wall of spike and cap central circular hole is adhesively fixed.Owing to spiral elastic arm can be made foot Enough tiny, this kind of structure can fully reduce a power passing through capping between spike outer wall and mounting seat and transmit so that it is causes Error affect for the precision in second-order range, reach the degree ignored.

Capping 15 with holding part with the use of, the second precision LOAD CELLS being pointed in containing cavity is preferably protected Protect.

In the present embodiment, the range of the first precision LOAD CELLS is less than the range of the second precision LOAD CELLS, namely It is to say that the maximum of the first precision LOAD CELLS value of weighing is less than the maximum of the second precision LOAD CELLS and weighs value, passes through Choose suitable spring, and select suitable power of leading pressure contact portion and the distance led between power support, can be by the first essence Degree LOAD CELLS pressure is limited in its range ability, thus prevents the first LOAD CELLS from being pressed because of overweight Damage；The advantage of this limiter protected mode is: owing to the elastic deformation of strain gauge load cell is the least, such as this reality The deformation difference in height executed in example in the whole range of the first precision LOAD CELLS is calculated in microns, if using rigid support Replace the spring in the present embodiment, then the gap between power of leading pressure contact portion and power of the leading support of mounting seat of upper supporting part is also Must weigh with micron, this is the most too high to requirement on machining accuracy, and in view of the error in materials processing molding and Material that the temperature difference causes expands change, industrial is difficulty with；If but use spring to amplify deformation, just can effectively have Effect reduces requirement on machining accuracy and manufacturing cost.

Upper supporting part is in free state namely when not being stressed, and the top 50 of upper supporting part exceeds the top leading power support 120；Move down during upper supporting part pressure-bearing stress, when upper supporting part pressure-bearing stress is less than 5 kilogram, namely on the first rank Time in range ability, by selecting suitable spring and selecting suitable power of leading pressure contact portion and lead the spacing of power support, During so that weigh in this rank range, the power pressure contact portion of leading will not be crimped onto and cause on support, namely upper supporting part bears Whole pressure, and pass to spring, lower supporting part, the first precision LOAD CELLS, mounting plate portion, the second essence successively Degree LOAD CELLS and a spike；Show what the first precision LOAD CELLS measured now by external central control circuit Data, its accuracy value is up to 1 gram；When upper supporting part pressure-bearing stress is less than 50 kilograms and is more than or equal to 5 kilogram, Namely time in second-order range ability, the power pressure contact portion of leading can be crimped on leads on power support, due to spring pressure not It is further added by, thus effectively protects the first precision LOAD CELLS will not be because of overweight crushing；Now in upper supporting part pressure, Having 5 kilograms in concrete practice, this force value may be slightly changed because of machining accuracy error, but not over the first essence Degree LOAD CELLS maximum load value, from without damage the first precision LOAD CELLS pass to successively spring, Bearing member, the first precision LOAD CELLS, mounting plate portion, the second precision LOAD CELLS and a spike；Remaining pressure then leads to Cross the power support of leading and pass to mounting plate portion, the second precision LOAD CELLS and a spike successively；At this moment controlled by central authorities Circuit shows the data that the second precision LOAD CELLS measures, and its accuracy value only has 100 grams.

The structure design of the present embodiment is relatively reasonable, it is possible to reduces requirement on machining accuracy, reduces manufacturing cost and technology difficulty； Additionally can also effectively prevent the first precision LOAD CELLS because of overweight and crushing；In addition set on the outer wall of the present embodiment mounting seat There is the clamping installation portion 14 for installing self entirety, when assembling, can entire card be contained on external plastic feet, operation Simple and direct facility.

Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not to this The restriction of the embodiment of invention.For those of ordinary skill in the field, the most also may be used To make other changes in different forms.Here without also cannot all of embodiment be given exhaustive.And this Belong to obvious change that the connotation of the present invention extended out a bit or variation still falls within protection scope of the present invention.

Claims

1. there is double rank double precision LOAD CELLS of governor motion, including mounting seat, the first precision weighing and sensing Device, the second precision LOAD CELLS and a spike；It is characterized in that: also include elastic supporting piece and governor motion；Described Mounting seat is provided with mounting plate portion and for self pressure being passed to power of the leading support of mounting plate portion；Elastic bearing Part, the first precision LOAD CELLS, mounting plate portion, the second precision LOAD CELLS, a spike crimp setting successively；

Elastic supporting piece includes upper supporting part, spring and lower supporting part；The upper end of spring is connected on upper supporting part, spring Lower end be connected on lower supporting part, lower supporting part crimping be arranged on the first precision LOAD CELLS；

The top of lower supporting part is provided with annular spacing groove and is positioned at the regulation screw of annular spacing groove center；Upper supporting part Diapire be provided with the annular adaptive with leading power support lead power pressure contact portion, downward projection of for spring upper end is carried out spacing Positive stop lug boss and be positioned at the regulation slide opening of positive stop lug boss center；Spring upper end is set on this positive stop lug boss periphery wall, And apical grafting is on the diapire of upper supporting part；

Described governor motion includes regulating screw；Described regulation slide opening is stepped hole, is that aperture is bigger the most successively The less slide opening district of crimping porose area and aperture, the diapire of crimping porose area is as electrolysis, and slide opening district is smooth circular hole；Institute State regulation screw and be sequentially provided with the portion of screwing, traveller portion and the spiro union portion adaptive with regulation screw from top to bottom；Described spiro union portion Being spirally connected in the regulation screw being fixed on lower supporting part, during free state, under the top pressure effect of spring, the portion of screwing is positioned at pressure Connect in porose area, and the bottom screwing portion is crimped on the diapire of crimping porose area, namely on described electrolysis；Then position, traveller portion In slide opening district；Under external force, described upper supporting part can slide up and down under the guide effect in regulation screw traveller portion.

Double rank double precision LOAD CELLS with governor motion the most according to claim 1, it is characterised in that: The range of the first precision LOAD CELLS is less than the range of the second precision LOAD CELLS.