CN102506967B - Safe constant-proportion tension two-force bar and lever system - Google Patents
Safe constant-proportion tension two-force bar and lever system Download PDFInfo
- Publication number
- CN102506967B CN102506967B CN 201110325352 CN201110325352A CN102506967B CN 102506967 B CN102506967 B CN 102506967B CN 201110325352 CN201110325352 CN 201110325352 CN 201110325352 A CN201110325352 A CN 201110325352A CN 102506967 B CN102506967 B CN 102506967B
- Authority
- CN
- China
- Prior art keywords
- power bar
- power
- lever
- bars
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to the technical field of mass metrology and particularly discloses a safe constant-proportion tension two-force bar and lever system applied to a measuring instrument for recurring the weight mass. A two-force bar is of a flat plate structure of which both upper and lower edges are of a circular arc shape. A square through hole is formed at the upper part of the two-force bar. A horizontal tool edge is formed at the upper end of the square through hole. A round through hole is formed at the lower part of the two-force bar. A round tool edge is formed at the edge of the round through hole. A two-force bar tool apron is fixed at a two-force bar hanging end. The horizontal tool edge of the two-force bar is placed in a V-shaped groove of the horizontal two-force bar tool apron. A two-force bar pull ring is arranged at the round tool edge of the two-force bar and is fixed at the left end of a lever. The right end of the lever is fixed at an electromagnetic force sensor hanging end through an electromagnetic force sensor. An external force is loaded at an external force loading point at the left side of the lever. The two-force bar has a simple structure. The two-force bar is matched with the two-force bar tool apron and the two-force bar pull ring. Under the condition that the accuracy of the measuring instrument is not reduced, the service life and the reliability of the measuring instrument are obviously improved.
Description
Technical field
The invention belongs to the mass metrology technical field, the ratio of deciding that is specifically related to a kind of safety of the measurement instrument that is applied to reappear counterbalance mass pulls to two power bar and lever systems.
Background technology
In recent years, the measurement instrument that reappears large counterbalance mass has a great development, and its main thought is: adopt lever system, the gravity that counterbalance mass is produced carries out ratio to be dwindled, and adopts the electro magnetic force sensor of pin-point accuracy grade to differentiate power value after dwindling again.The Background Cause that produces this technical scheme is: when the quality amount passed, counterweight was Main Regulator, weigh instrument and be used for the reproduction counterbalance mass, and be slave, as long as guaranteed the accuracy of counterweight and the resolution characteristic of weighing instrument, can the amount of ensuring the quality of products pass.
Adopt the wide-measuring range of above-mentioned thinking development to weigh the series of products that instrument mainly contains Switzerland METTLER TOLEDO company and German sartorius company, measure the upper limit and do not wait from 500kg to 5t, these weigh instruments have had the long period in China application.In application process, these used two power bars that pull to of lever system of weighing instrument often break down, and need depot repair.Existing certain pull to two power bars and adopt high-intensity special material to make, thickness 0.5mm, adopt pin to fix at two ends, thin slice is subjected to pulling force, and the position of damage is the position that pin is connected with thin slice, and this two power bars that pull to damage easily, main cause is: be to guarantee the lever system scaling accurately and reliably during design, must reduce the thickness of two power bars, and the phenomenon that stress is concentrated very easily appears in the position that contacts between pin and the two power bars, cause its insufficient strength.
Summary of the invention
The object of the present invention is to provide a kind of safe ratio of deciding to pull to two power bar and lever systems, can be reliable in the lever system ratio of measurement instrument of the large counterbalance mass of reproduction, intensity is reliable, and do not reduce in the situation of weighing instrument accuracy grade, improve its life-span and reliability.
Technical scheme of the present invention is as follows: a kind of safe ratio of deciding pulls to two power bars, this two power bar is for having certain thickness, both sides are the slab construction of circular arc up and down, wherein, two power bar central upper portion have square through hole, and at the horizontal edge of a knife of this square through hole upper end formation with angle, the middle part, bottom of two power bars has manhole, and forms the circular knife edge with angle at the manhole edge.
Described two power bar thickness are 12～18mm, and formation angle in two power bar central upper portion square through holes upper end is 90 ° the horizontal edge of a knife, and two power bar lower central manhole edges formation angle is 90 ° circular knife edge.
Described two power bars are width 76～84mm, and the slab construction of long 140～143mm, its central upper portion have height 31～35mm, width 46～50mm square through hole.
The upper edge of described two power bars is the arc-shaped edges of radius 50～56mm, and the lower edge of two power bars is the arc-shaped edges of radius 35～40mm, and this arc-shaped edges and two vertical edges form 130 °～140 ° angle.
A kind of safe ratio of deciding pulls to lever system, comprise two power bar suspended end, lever, electro magnetic force sensor, the external force load(ing) point in electro magnetic force sensor suspended end and lever left side, also comprise two power bars, two power bar tool rests and two power bar draw rings, wherein, two power bar tool rests are the rectangular structure that the upper end has " V " type groove, two power bar tool rests are fixed on the two power bar suspended end, the horizontal edge of a knife of the square through hole on two power bar tops upper end is placed in " V " type groove of two power bar tool rests of level, two power bar draw rings are the cylindrical structure that sidewall has circumferential " V " type annular groove, its diameter is slightly less than the diameter of two power bar circular knife edge, two power bar draw rings are fixed on the left end of lever, and " V " type annular groove in the two power bar draw rings is positioned on the circular knife edge of two power bar bottoms, the right-hand member of lever is fixed on the electro magnetic force sensor suspended end by electro magnetic force sensor, and loads external force at the external force load(ing) point place in lever left side.
" V " type annular groove in the described two power bar draw rings is vertical with lever, and " V " type annular groove of the circular knife edge of the horizontal edge of a knife of the square through hole of " V " type groove of two power bar tool rests, two power bars upper end, two power bars and two power bar draw rings is in the same level face.
Described two power bar tool rests are long 44～48mm, wide 23～27mm, and high 18～22mm, the center, upper end has the rectangular structure of 120 ° of angles " V " type groove.
It is 7～9mm that both sides, center, long limit, described two power bar tool rest lower ends form two radiuses, and height is the circular arc projection of 1～3mm.
Described two power bar draw rings are the cylindrical structure that sidewall has circumferential 120 ° of angles " V " type annular groove.
Remarkable result of the present invention is: of the present inventionly a kind ofly safe decide ratio to pull to two power bars simple in structure, two power bars and two power bar tool rests and two power bar draw rings cooperatively interact, not reducing in the situation of weighing instrument accuracy grade, obviously improve its life-span and reliability.
Description of drawings
Fig. 1 is that a kind of safe ratio of deciding shown in the present pulls to system schematic;
Fig. 2 is that a kind of safe ratio of deciding shown in the present pulls to two power bar structural representations;
Fig. 3 is the side view of Fig. 2;
Fig. 4 is the front view of two power bar tool rests among Fig. 1;
Fig. 5 is the side view of two power bar tool rests among Fig. 1;
Fig. 6 is two power bar draw ring structural representations among Fig. 1;
Among the figure: 1, two power bar suspended end; 2, two power bars; 3, two power bar tool rests; 4, two power bar draw rings; 5, external force load(ing) point; 6, lever; 7, electro magnetic force sensor; 8, electro magnetic force sensor suspended end.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is described in further detail.
Embodiment 1
A kind of safe ratio of deciding as shown in Figure 2 pulls to two power bars 2, this two power bar 2 is thickness 12mm, wide 76mm, long 140mm, both sides are the slab construction of circular arc up and down, wherein, two power bars, 2 central upper portion have height 31mm, the square through hole of wide 46mm, and to form angle be 90 ° the horizontal edge of a knife in this square through hole upper end, two power bars, 2 lower central have manhole, and form angle at the manhole edge and be 90 ° circular knife edge, the upper edge of two power bars 2 is the arc-shaped edges of radius 50mm, and the lower edge of two power bars 2 is the arc-shaped edges of radius 35mm, and this arc-shaped edges and two vertical edges form 130 ° angle.
Such as Fig. 1, Fig. 3～shown in Figure 5, a kind of safe ratio of deciding pulls to lever system, comprise two power bar suspended end 1, two power bars 2, two power bar tool rests 3, two power bar draw ring 4 and levers 6, wherein, two power bar tool rests 3 are long 44mm, wide 23mm, high 18mm, the center, upper end has the rectangular structure of 120 ° of angles " V " type groove, and formation two radiuses in both sides, center, long limit are 7mm in two power bar tool rests, 3 lower ends, and height is the circular arc projection of 1mm, two power bar tool rests 3 are fixed by screws on the two power bar suspended end 1, and the horizontal edge of a knife of the square through hole of two power bars 2 upper end is placed in " V " type groove of horizontally disposed two power bar tool rests 3; The cylindrical structure of 120 ° of angles " V " type annular groove that two power bar draw rings 4 are circumferential for sidewall has, and two power bar pull bars, 4 diameters are slightly less than the diameter of two power bars, 2 circular knife edge, two power bar draw rings 4 are fixed on the left end of lever 6, and " V " type annular groove in the two power bar draw rings 4 is positioned on the circular knife edge of two power bars, 2 bottoms, wherein, " V " type annular groove in the two power bar draw rings 4 is vertical with lever 6, and guarantee " V " type groove of two power bar tool rests 3, the horizontal edge of a knife of the square through hole upper end of two power bars 2, " V " type annular groove of the circular knife edge of two power bars 2 and two power bar draw rings 4 is at same perpendicular, the right-hand member of lever 6 is fixed on the electro magnetic force sensor suspended end 8 by electro magnetic force sensor 7, and external force load(ing) point 5 places in lever 6 left sides are loaded external force.
A kind of safe ratio of deciding as shown in Figure 2 pulls to two power bars 2, this two power bar 2 is thickness 15mm, wide 80mm, long 143mm, both sides are the slab construction of circular arc up and down, wherein, two power bars, 2 central upper portion have height 33mm, the square through hole of wide 48mm, and to form angle be 90 ° the horizontal edge of a knife in this square through hole upper end, two power bars, 2 lower central have manhole, and form angle at the manhole edge and be 90 ° circular knife edge, the upper edge of two power bars 2 is the arc-shaped edges of radius 53mm, and the lower edge of two power bars 2 is the arc-shaped edges of radius 37mm, and this arc-shaped edges and two vertical edges form 136 ° angle.
Such as Fig. 1, Fig. 3～shown in Figure 5, a kind of safe ratio of deciding pulls to lever system, comprise two power bar suspended end 1, two power bars 2, two power bar tool rests 3, two power bar draw ring 4 and levers 6, wherein, two power bar tool rests 3 are long 46mm, wide 25mm, high 20mm, the center, upper end has the rectangular structure of 120 ° of angles " V " type groove, and formation two radiuses in both sides, center, long limit are 8mm in two power bar tool rests, 3 lower ends, and height is the circular arc projection of 2mm, two power bar tool rests 3 are fixed by screws on the two power bar suspended end 1, and the horizontal edge of a knife of the square through hole of two power bars 2 upper end is placed in " V " type groove of horizontally disposed two power bar tool rests 3; The cylindrical structure of 120 ° of angles " V " type annular groove that two power bar draw rings 4 are circumferential for sidewall has, and two power bar pull bars, 4 diameters are slightly less than the diameter of two power bars, 2 circular knife edge, two power bar draw rings 4 are fixed on the left end of lever 6, and " V " type annular groove in the two power bar draw rings 4 is positioned on the circular knife edge of two power bars, 2 bottoms, wherein, " V " type annular groove in the two power bar draw rings 4 is vertical with lever 6, and guarantee " V " type groove of two power bar tool rests 3, the horizontal edge of a knife of the square through hole upper end of two power bars 2, " V " type annular groove of the circular knife edge of two power bars 2 and two power bar draw rings 4 is at same perpendicular, the right-hand member of lever 6 is fixed on the electro magnetic force sensor suspended end 8 by electro magnetic force sensor 7, and external force load(ing) point 5 places in lever 6 left sides are loaded external force.
A kind of safe ratio of deciding as shown in Figure 2 pulls to two power bars 2, this two power bar 2 is thickness 18mm, wide 84mm, long 146mm, both sides are the slab construction of circular arc up and down, wherein, two power bars, 2 central upper portion have height 35mm, the square through hole of wide 50mm, and to form angle be 90 ° the horizontal edge of a knife in this square through hole upper end, two power bars, 2 lower central have manhole, and form angle at the manhole edge and be 90 ° circular knife edge, the upper edge of two power bars 2 is the arc-shaped edges of radius 56mm, and the lower edge of two power bars 2 is the arc-shaped edges of radius 40mm, and this arc-shaped edges and two vertical edges form 140 ° angle.
Such as Fig. 1, Fig. 3～shown in Figure 5, a kind of safe ratio of deciding pulls to lever system, comprise two power bar suspended end 1, two power bars 2, two power bar tool rests 3, two power bar draw ring 4 and levers 6, wherein, two power bar tool rests 3 are long 48mm, wide 27mm, high 22mm, the center, upper end has the rectangular structure of 120 ° of angles " V " type groove, and formation two radiuses in both sides, center, long limit are 9mm in two power bar tool rests, 3 lower ends, and height is the circular arc projection of 3mm, two power bar tool rests 3 are fixed by screws on the two power bar suspended end 1, and the horizontal edge of a knife of the square through hole of two power bars 2 upper end is placed in " V " type groove of horizontally disposed two power bar tool rests 3; The cylindrical structure of 120 ° of angles " V " type annular groove that two power bar draw rings 4 are circumferential for sidewall has, and two power bar pull bars, 4 diameters are slightly less than the diameter of two power bars, 2 circular knife edge, two power bar draw rings 4 are fixed on the left end of lever 6, and " V " type annular groove in the two power bar draw rings 4 is positioned on the circular knife edge of two power bars, 2 bottoms, wherein, " V " type annular groove in the two power bar draw rings 4 is vertical with lever 6, and guarantee " V " type groove of two power bar tool rests 3, the horizontal edge of a knife of the square through hole upper end of two power bars 2, " V " type annular groove of the circular knife edge of two power bars 2 and two power bar draw rings 4 is at same perpendicular, the right-hand member of lever 6 is fixed on the electro magnetic force sensor suspended end 8 by electro magnetic force sensor 7, and external force load(ing) point 5 places in lever 6 left sides are loaded external force.
Claims (9)
1. the ratio of deciding of a safety pulls to two power bars, it is characterized in that: this two power bar (2) is for having certain thickness, both sides are the slab construction of circular arc up and down, wherein, two power bar (2) central upper portion have square through hole, and at the horizontal edge of a knife of this square through hole upper end formation with angle, the middle part, bottom of two power bars (2) has manhole, and forms the circular knife edge with angle at the manhole edge.
2. a kind of safe ratio of deciding according to claim 1 pulls to two power bars, it is characterized in that: described two power bar (2) thickness are 12～18mm, formation angle in two power bar (2) central upper portion square through holes upper end is 90 ° the horizontal edge of a knife, and two power bar (2) lower central manhole edges formation angle is 90 ° circular knife edge.
3. a kind of safe ratio of deciding according to claim 1 pulls to two power bars, it is characterized in that: described two power bars (2) are width 76～84mm, the slab construction of long 140～143mm, its central upper portion have height 31～35mm, width 46～50mm square through hole.
4. a kind of safe ratio of deciding according to claim 3 pulls to two power bars, it is characterized in that: the upper edge of described two power bars (2) is the arc-shaped edges of radius 50～56mm, the lower edge of two power bars (2) is the arc-shaped edges of radius 35～40mm, and this arc-shaped edges and two vertical edges form 130 °～140 ° angle.
5. the ratio of deciding of a safety pulls to lever system, comprise the external force load(ing) point in two power bar suspended end (1), lever (6), electro magnetic force sensor (7), electro magnetic force sensor suspended end (8) and lever (6) left side, it is characterized in that: also comprise two power bars (2), two power bar tool rests (3) and two power bar draw rings (4); Wherein, two power bar tool rests (3) have the rectangular structure of " V " type groove for the upper end, two power bar tool rests (3) are fixed on the two power bar suspended end (1), the horizontal edge of a knife of the square through hole on two power bar (2) tops upper end is placed in " V " type groove of two power bar tool rests (3) of level, the cylindrical structure of " V " type annular groove that two power bar draw rings (4) are circumferential for sidewall has, its diameter is slightly less than the diameter of two power bar (2) circular knife edge, two power bar draw rings (4) are fixed on the left end of lever (6), and " V " type annular groove in the two power bar draw rings (4) is positioned on the circular knife edge of two power bar (2) bottoms, the right-hand member of lever (6) is fixed on the electro magnetic force sensor suspended end (8) by electro magnetic force sensor (7), and locates to load external force at the external force load(ing) point (5) in lever (6) left side.
6. a kind of safe ratio of deciding according to claim 5 pulls to lever system, it is characterized in that: " V " type annular groove in the described two power bar draw rings (4) is vertical with lever (6), and " V " type annular groove of the circular knife edge of the horizontal edge of a knife of the square through hole of " V " type groove of two power bar tool rests (3), two power bars (2) upper end, two power bars (2) and two power bar draw rings (4) is in same perpendicular.
7. a kind of safe ratio of deciding according to claim 5 pulls to lever system, it is characterized in that: described two power bar tool rests (3) are long 44～48mm, wide 23～27mm, high 18～22mm, the center, upper end has the rectangular structure of 120 ° of angles " V " type groove.
8. a kind of safe ratio of deciding according to claim 7 pulls to lever system, it is characterized in that: it is 7～9mm that both sides, center, long limit, described two power bar tool rest (3) lower ends form two radiuses, and height is the circular arc projection of 1～3mm.
9. a kind of safe ratio of deciding according to claim 5 pulls to lever system, it is characterized in that: the cylindrical structure of 120 ° of angles " V " type annular groove that described two power bar draw rings (4) are circumferential for sidewall has.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110325352 CN102506967B (en) | 2011-10-24 | 2011-10-24 | Safe constant-proportion tension two-force bar and lever system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110325352 CN102506967B (en) | 2011-10-24 | 2011-10-24 | Safe constant-proportion tension two-force bar and lever system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102506967A CN102506967A (en) | 2012-06-20 |
| CN102506967B true CN102506967B (en) | 2013-10-23 |
Family
ID=46219074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110325352 Active CN102506967B (en) | 2011-10-24 | 2011-10-24 | Safe constant-proportion tension two-force bar and lever system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102506967B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181088B (en) * | 2015-09-20 | 2017-12-08 | 天津大学 | A kind of design method suitable for more grade precision balances |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1016422A (en) * | 1962-06-06 | 1966-01-12 | Schenck Gmbh Carl | Improvements in or relating to automatic weighing apparatus |
| CN2627493Y (en) * | 2003-07-25 | 2004-07-21 | 上海复旦天欣科教仪器有限公司 | Young's modulus determinator with Hall position sensor |
| CN202304965U (en) * | 2011-10-24 | 2012-07-04 | 北京航天计量测试技术研究所 | Safe definite-proportion pulling direction two-force bar and lever system |
-
2011
- 2011-10-24 CN CN 201110325352 patent/CN102506967B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102506967A (en) | 2012-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103588061B (en) | Elevator weighing apparatus | |
| CN102506967B (en) | Safe constant-proportion tension two-force bar and lever system | |
| CN106546157A (en) | A kind of circuit breaker operation mechanism intelligent online monitoring device and method | |
| CN202304965U (en) | Safe definite-proportion pulling direction two-force bar and lever system | |
| CN101717047A (en) | Overload protection device for electric hoist crane | |
| CN103105354A (en) | Rapid test sample tensile stress corrosion tester | |
| CN202533299U (en) | Device for preparing sample for testing breaking force of steel wire rope | |
| CN202133358U (en) | Replaceable outside thread sealing surface diameter measuring instrument | |
| CN203274666U (en) | Pre-embedded load-bearing bolt deformation monitoring early warning device | |
| CN203100654U (en) | Testing fixture for center holes | |
| CN205471354U (en) | Roller fracture alarm device in roll table transfer chain | |
| CN202033096U (en) | Ladle electronic scale with double-layer scale platform | |
| CN109186719B (en) | Electromagnetic liquid level measuring device for heavy oil suspension bed hydrocracking high-temperature high-pressure reactor | |
| CN100580396C (en) | Melting liquid temperature continuous measurement method and apparatus | |
| CN106644549A (en) | Bearing test device of airplane jack and testing method | |
| CN202947957U (en) | Quick corrosion testing machine for testing tensile stress of test sample | |
| CN213515929U (en) | Modular weighing device used in high-temperature occasions | |
| CN205217969U (en) | It constructs to hold up formula weighing machine | |
| CN203672767U (en) | Gravity type dial indicator clamp for steel bar bond stress test | |
| CN203489965U (en) | Weighing mechanism with automatic fault detection | |
| CN103292775B (en) | Built-in type load-bearing bolt deformation monitoring prior-warning device | |
| CN202195793U (en) | Three-phase electrode circle center positioning device for electric furnace and ladle refining furnace | |
| CN104215361A (en) | Pressure measuring device | |
| CN202119572U (en) | Attachment type resistance strain transducer | |
| CN210036921U (en) | Side-hanging weighing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |