CN2155558Y - Weighing mechanism for electronic conveyer-belt weighers - Google Patents
Weighing mechanism for electronic conveyer-belt weighers Download PDFInfo
- Publication number
- CN2155558Y CN2155558Y CN93217240U CN93217240U CN2155558Y CN 2155558 Y CN2155558 Y CN 2155558Y CN 93217240 U CN93217240 U CN 93217240U CN 93217240 U CN93217240 U CN 93217240U CN 2155558 Y CN2155558 Y CN 2155558Y
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- China
- Prior art keywords
- balancing stand
- housing
- sensor
- weighing
- axis
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- Expired - Fee Related
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- 238000005303 weighing Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 235000014676 Phragmites communis Nutrition 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 7
- 210000003205 muscle Anatomy 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/003—Details; specially adapted accessories
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/23—Support or suspension of weighing platforms
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The utility model relates to a weighing mechanism for electronic conveyer-belt weighers, wherein, at least one stress face of a spring strip supporting seat is a circular arc face; the radius of the circular arc face is the vertical distance of the stress point of the spring strip supporting seat to the shaft line of a balancing stand; the circle center of the circular arc face is positioned on the shaft line. One end of the force transmitting spring strip is fixedly and mutually connected with the circular arc face; the other end is fixedly and mutually connected with a weighing frame. The two ends of the balancing stand are respectively supported on two opposite side walls of a rigid shell body in a rotatable mode. One end of a weighing sensor is fixedly connected to the rigid shell body; the other end is mutually connected with the other end of the balancing stand. The mechanism can enhance measurement precision and stability.
Description
The present invention relates to a kind of Weighing mechanism that is used for belted electronic balance, comprise the weighing carrier roller and the weighing frame that are positioned at the belt below, balancing stand, gimbal axis, be positioned at the reed support at a two ends, the power transmission reed that connects weighing frame and reed support, the LOAD CELLS of connection balancing stand front end and base rear end.
Force transfering device is a conversion links in the belted electronic balance weighing process, and its precision and stability are to the good and bad decisive role of the performance of belt conveyer scale.At present, the kind of belted electronic balance is a lot, its load transfer device major part all is a leverage, but the defective of this leverage is, need seek the linearity repeatedly during installation, repeatability and all good location point of null value stability, technical sophistication, and the field condition of Installation and Debugging is required very high, thereby its precision and stability just are difficult to guarantee.Usually, smart attitude reaches 8 ‰.Be more satisfactory.
Disclose the carrier bar of a kind of power transmission and conversion among the Deutsche Bundespatent DT2810-185, wherein adopted the force transferring structure of arc surface.But this structure can not guarantee still that when stressed distance between stress point and the fulcrum is constant.Therefore, this structure still has the defective that can not accurately guarantee measuring accuracy.
The purpose of this utility model is to provide a kind of Weighing mechanism that is used for belted electronic balance, and this mechanism originally can be owing to its structure influences measuring accuracy when stressed.
The utility model adopts following manner to realize above-mentioned purpose:
A kind of Weighing mechanism that is used for belted electronic balance, comprise the weighing carrier roller and the weighing frame that are positioned at the belt below, balancing stand, gimbal axis, be positioned at the reed support at a two ends, the power transmission reed that connects weighing frame and reed support, at least reed support stress surface is an arc surface, the radius of this arc surface is the vertical range of reed support stress point to the balancing stand axis, its center of circle is on described axis, one end and the above-mentioned arc surface of power transmission reed are fixedly linked, its other end and weighing frame are fixedly linked, the two ends of described balancing stand are rotatably supported in respectively on two relative sidewalls of a rigid housing, and an end of described LOAD CELLS is fixed on the above-mentioned stiff case, and its other end then links to each other with the other end of balancing stand.
The end that described balancing stand links to each other with sensor is an arc surface, and the radius of this face is the distance of balancing stand top stress point to the balancing stand axis, and its center of circle is on described axis.
Described stiff case is a rectangular case, is provided with reinforcement in the housing, and the end face of described housing is plane or sphere.
In described housing, along the direction that parallels with the balancing stand axis, pass the position that described sensor is connected with housing and be provided with reinforcement, this muscle contains this sensor in the position of described sensor, thereby make this housing be subjected to perpendicular to described position 1.5 times in the position of described sensor under the effect of the power of sensor full scale value, the vertical deformation at the upper surface place that it is corresponding is less than 0.01mm, preferably less than 0.005mm.
Because the utility model has adopted the structure that arc surface is fixedlyed connected with the power transmission spring leaf is set in the end of balancing stand, so guaranteed that in the utility model mechanism the distance of the stress point of balancing stand and the balancing stand centre of gyration is constant when stressed fully.Guaranteed the measuring accuracy of this mechanism therefrom effectively.
Because the utility model has also adopted rigid housing,, further improved the measuring accuracy of this Weighing mechanism so again again so this mechanism one-piece construction when stressed can not produce distortion.Also be provided with many reinforcements in the described stiff case, these muscle be arranged on inner walls around.One side of gusset is connected with the top board of described housing, and its opposite side then is connected with the vertical sidewall of housing.Especially also be provided with a special-shaped gusset with described gimbal axis line parallel on housing top board and position that sensor is connected, the middle part of this gusset is a cavity that can hold described sensor, and the two ends of cavity are connected with two gussets longitudinally.Like this, can strengthen housing top board intensity herein effectively, thereby make it under the situation of the load that is subjected to being less than or equal to 1.5 times of sensor full scale values, its vertical deformation is preferably less than 0.005mm less than 0.01mm.
To be described in detail a specific embodiment of the present utility model with reference to the accompanying drawings below, will become more obvious by following description other purpose of the present utility model and effect.Wherein:
Fig. 1 is the synoptic diagram of expression prior art force transfering device structure;
Fig. 2 is the stressed principle analysis synoptic diagram of expression prior art force transfering device;
Fig. 3 is the stressed former synoptic diagram of more analyzing of expression the utility model Weighing mechanism;
Fig. 4 is the synoptic diagram of expression the utility model Weighing mechanism housing and other part;
Fig. 5 is the diagrammatic sketch along the expression reed annexation of α among Fig. 4-α line partial cutaway.
Existing lever force transfering device as shown in Figure 1, only schematically represented a side comprising weighing carrier roller 2 that is arranged in both sides, belt 1 below and weighing frame 4(figure), balancing stand 3, balancing stand rotating shaft 8 has also only been represented a side with the reed support 9(figure that is arranged in these two ends), connect the power transmission reed 5 of weighing frame 4 and reed support 9, be connected in the LOAD CELLS 6 on balancing stand 3 front ends and the transporter base.
At present, in this all series products, power transmission reed and reed support be connected and LOAD CELLS and being connected of balancing stand all are being connected with the plane as shown in Figure 1.The screw of the fixedly connected usefulness of the expression of 7,11 among the figure.In the patent document and non-patent document of many relevant belted electronic balances, there is no the discussion of the syndeton of relevant power transmission reed and LOAD CELLS.
The applicant is through Theoretical Calculation and practice test, and propose following viewpoint: power transmission reed and LOAD CELLS are this traditional on force transfering device, with the structure that the plane connects, is one of odjective cause that influences transmitting accuracy and device stability.Therefore, must make improvements.The analysis of existing power transfer principle as shown in Figure 2, balancing stand axle center O point is balance pivot, W ' is an original state gravity, acts on A ' point.F ' is the suffered power of light condition lever head, and this masterpiece is used for B ' point.W is the suffered gravity of lever, is same as the elastic deformation of sensor, and at this moment lever tilts, and this masterpiece is used for the B point.F1, F2 are the component of F.α is a weight arm, and b is for transmitting the arm of force, and α is the deviation of lever angle, and θ is last tie point A ' angle of turning over of its time tie point D relatively of stressed rear spring sheet.According to lever balance theory, it is as follows to transmit power F computing formula:
W1.α＝F1.b （1）
W1＝w.cos（α＋θ） （2）
F1＝F.cos (α)/2 （3）
With (2), (3) substitution (1), then:
F＝ (cos（α＋θ）)/(cos（α／2）) · (α)/(b) W （4）
From (4) as can be seen, F is the function of variable α and θ, and constantly change according to the difference of gravity W, although in fact angle α is less than 0.2 degree, angle θ is littler than angle α, but the error of moment is an outwardness, and under the situation more and more higher to belted electronic balance precision and stability requirement, the reason that this error produces must not be ignored.Under the situation that this error exists, prior art remedies with the precision of position of the fulcrum usually, and this also is one of prior-art devices stability reason of being difficult to guarantee.
Shown in Figure 3 is a kind of structure of the present utility model.Wherein, the both sides below belt 1 are respectively equipped with weighing carrier roller 2, are connected with weighing frame 4 rigidly with carrying roller below this carrying roller, and axle 8 is supported on the stiff case 13 that is fixedly linked with belt conveyer rotationally.Can clearly be seen that from Fig. 3 reed support 9 is cylindrical, an end of power transmission reed is fixedlyed connected with reed support by screw 11, and its other end then is fixedly linked with weighing frame 4.The power transmission reed is on cylindrical reed support 9 like this, therefore, the utility model mechanism when stressed stress point A to the distance A O of centre of gyration O be constant.Eliminated therefrom because the variation of the arm of force and to the influence of measurement result, this also is a kind of important measures that measuring accuracy improves in the utility model mechanism in the leverage.Certainly, also this mechanism can be used for the end that balancing stand links to each other with sensor, the advantage of Bu Zhiing is further to improve measuring accuracy like this.
Shown in Fig. 3 and 4, in the utility model, balancing stand 3 usefulness bearings are supported on a rigid housing 13 rotationally.This stiff case 13 is rectangular, its upper surface can be that the plane also can be a sphere, preferably sphere.The one side of this housing is opened wide, on the sidewall of housing and position that end face is connected, also evenly be furnished with reinforcement 14, the position that is connected with the housing end face at as shown in the figure sensor also is provided with a reinforcement 15 that parallels with the axis of rotation of balancing stand individually, and this muscle is depression shape at described position.This depression shape is used to hold sensor.Do not represent above-mentioned depression shape among the figure for simplicity's sake, and its gusset longitudinally that just drawn.By layout reinforcement like this, make that the bulk strength of housing and rigidity are well strengthened.Like this, housing is when the load that is subjected to 1.5 times of the sensor full scale, and its vertical deformation is less than 0.01mm, preferably less than 0.005mm.This housing is to be fixed on the base of belt conveyer by the screw among Fig. 4 17, not expression in detail of the screw 17 among the figure.As can also be seen from Figure spring leaf 5 also by screw retention on spring abutment 9.
The mode that the utility model combines by above-mentioned circular globoidal structure and stiff case just realizes above-mentioned purpose.Because arc structure can guarantee measuring accuracy from the physical dimension direction, still, when the integral rigidity of this mechanism and undercapacity, will cause measuring error owing to the distortion of structure itself.Therefore, possessing under the condition of above-mentioned strength and stiffness, guaranteeing smart attitude measuring accuracy reliably in 0.02 scope, dynamic accuracy is within 0.1.(requirement of No. 50 suggestion of OIML is organized in the metering that measuring method satisfies international law).
Above-mentionedly in conjunction with the accompanying drawings description of the present utility model just is used for explanation to a specific embodiment of the present utility model, do not constitute qualification of the present utility model, those skilled in the art all can make various variations in spirit of the present utility model and claim institute restricted portion.
Claims (6)
1, a kind of Weighing mechanism that is used for belted electronic balance, comprise the weighing carrier roller (2) and the weighing frame (4) that are positioned at belt (1) below, balancing stand (3), gimbal axis (8), be positioned at the reed support (9) at a two ends, the reed vertical (9) that connects weighing frame (4) and reed support (9), it is characterized in that, at least a stress surface of reed support (9) is an arc surface, the radius of this arc surface is the vertical range of reed support (9) stress point to balancing stand (3) axis, its center of circle is on described axis, one end and the above-mentioned arc surface of power transmission reed (5) are fixedly linked, its other end and weighing frame (4) are fixedly linked, the two ends of described balancing stand (3) are rotatably supported in respectively on two relative sidewalls of a rigid housing (13), one end of described LOAD CELLS (6) is fixed on the above-mentioned stiff case (13), and its other end then links to each other with the other end of balancing stand (3).
2, mechanism as claimed in claim 1, it is characterized in that, described balancing stand (3) is an arc surface with the end that sensor (6) links to each other, and the radius of this face is the distance of balancing stand (3) top stress point to balancing stand (3) axis, and its center of circle is on described axis.
3, mechanism as claimed in claim 1 is characterized in that, described stiff case (13) is a rectangular case, is provided with in the housing as strong muscle.
As claim 1 or 3 described mechanisms, it is characterized in that 4, the end face of described housing (13) is the plane.
As claim 1 or 3 described mechanisms, it is characterized in that 5, the end face of described housing (13) is a sphere.
6, as claim 1 or 3 described mechanisms, it is characterized in that, in described housing, along the direction that parallels with balancing stand (3) axis, pass the position that described sensor (6) is connected with housing (13) and be provided with reinforcement (15), this muscle is at described sensor 96) the position contain this sensor, thereby this housing (13) was subjected to perpendicular to 1.5 times of the described position upper surface times spent of doing to the power of sensor full scale value in the position of described sensor (6), the vertical deformation at the upper surface place that it is corresponding is less than 0.01mm, preferably less than 0.005mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93217240U CN2155558Y (en) | 1993-06-28 | 1993-06-28 | Weighing mechanism for electronic conveyer-belt weighers |
| DE9311872U DE9311872U1 (en) | 1993-06-28 | 1993-08-09 | Weighing device for an electronic belt scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93217240U CN2155558Y (en) | 1993-06-28 | 1993-06-28 | Weighing mechanism for electronic conveyer-belt weighers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2155558Y true CN2155558Y (en) | 1994-02-09 |
Family
ID=5006121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93217240U Expired - Fee Related CN2155558Y (en) | 1993-06-28 | 1993-06-28 | Weighing mechanism for electronic conveyer-belt weighers |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN2155558Y (en) |
| DE (1) | DE9311872U1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374457A (en) * | 2014-09-29 | 2015-02-25 | 江苏鑫丰塑业有限公司 | Measurement scale for plasticizer |
| CN109029651A (en) * | 2018-08-01 | 2018-12-18 | 赵茂勋 | A kind of S type weighing sensor components mechanism |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507647B (en) * | 2018-04-09 | 2023-11-03 | 徐州三原称重技术有限公司 | High-precision high-stability electronic belt scale |
-
1993
- 1993-06-28 CN CN93217240U patent/CN2155558Y/en not_active Expired - Fee Related
- 1993-08-09 DE DE9311872U patent/DE9311872U1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374457A (en) * | 2014-09-29 | 2015-02-25 | 江苏鑫丰塑业有限公司 | Measurement scale for plasticizer |
| CN109029651A (en) * | 2018-08-01 | 2018-12-18 | 赵茂勋 | A kind of S type weighing sensor components mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| DE9311872U1 (en) | 1993-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |