CN110426109B - Automatic belt constant-tension tensioning device of electronic belt scale - Google Patents
Automatic belt constant-tension tensioning device of electronic belt scale Download PDFInfo
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- CN110426109B CN110426109B CN201910624593.1A CN201910624593A CN110426109B CN 110426109 B CN110426109 B CN 110426109B CN 201910624593 A CN201910624593 A CN 201910624593A CN 110426109 B CN110426109 B CN 110426109B
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- belt
- tensioning
- tension
- pulley
- sliding block
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/02—Arrangements of bearings
- G01G21/08—Bearing mountings or adjusting means therefor
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- General Physics & Mathematics (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The utility model provides an automatic overspeed device tensioner of electronic belt scale belt permanent tension, includes scale body frame, driven roller, tensioning counter weight, the one end of scale body frame bottom is fixed with initiative roller, and the other end both sides of scale body frame bottom all are equipped with sliding block set spare, and one side of 2 sliding block set spares all is equipped with the differential pulley assembly who fixes on scale body frame, install respectively on 2 sliding block set spares at driven roller's both ends, and driven roller is connected with initiative roller through the belt, the both ends of tensioning counter weight all connect respectively on 2 differential pulley assembly through wire rope for the tensioning, still the cover is equipped with the counter weight regulating block on the tensioning counter weight. The device realizes that a light tensioning balance weight generates a large constant tensioning force and can be used in occasions with large dust.
Description
Technical Field
The invention relates to a constant-tension automatic belt tensioning device of an electronic belt scale.
Background
The electronic belt scale is an automatic weighing apparatus which adds a weighing mechanism on a belt conveyer to complete dynamic accumulative weighing, and the weighing precision of the electronic belt scale is closely related to the tension of a belt. In the using process, the tension of the belt is changed due to the change of the weight of materials on the belt or the length extension after long-term use and the like, so a tensioning device which automatically generates pressing force to press the belt is needed to keep the tension of the belt basically constant; the automatic belt tensioning device is one of indispensable mechanisms of the electronic belt scale, and the weighing precision of the electronic belt scale is directly influenced by the performance of the automatic belt tensioning device.
The common automatic tensioning device structure of the electronic belt scale has a pendulum type, an eccentric type, a weight type and other modes. The pendulum automatic tensioning device is a tensioning device which enables a driven roller of an electronic belt scale to move and automatically compress a belt through a cantilever pendulum driving gear rack mechanism, the eccentric automatic tensioning device is a tensioning device which enables the driven roller to be installed on an eccentric wheel and enables the driven roller to compress the belt through a tensioning counterweight, and the two modes have the advantages of large lever ratio, light tensioning counterweight, high sensitivity and the like, but the defects that the lever ratio is related to the angular position of the tensioning counterweight and the tensioning force is not constant exist. The weight type automatic tensioning device is a tensioning device which can tension a driven roller by a tensioning counterweight through a chain or a steel wire rope to move and automatically compress a belt. This approach theoretically achieves constant tension tensioning, but the tensioning force is equal to the tensioning weight gravity, requiring a very heavy tensioning weight, resulting in low tensioning sensitivity. Moreover, the above three methods all have a common defect: the driven roller moves back and forth through a bearing installed in the sliding groove, and dust deposition in the sliding groove can cause the failure of the automatic tensioning device.
Disclosure of Invention
The invention aims to provide an automatic belt constant-tension tensioning device of an electronic belt scale, which solves the problem that the tension is not constant due to the fact that the lever ratio of the conventional tensioning device is related to the angle position of a tensioning counterweight.
The technical scheme adopted for achieving the purpose is that the belt constant-tension automatic tensioning device of the electronic belt scale comprises a scale body frame, a driving roller and a driven roller are arranged below the scale body frame, a belt is arranged between the driving roller and the driven roller, sliding block assemblies are arranged at two ends of the driven roller, the sliding block assemblies are arranged at two sides of the other end of the bottom of the frame, the sliding block assemblies are connected with differential pulley assemblies through steel wire ropes, and the differential pulley assemblies are connected with tensioning balance weights through the steel wire ropes for tensioning; the sliding block assembly comprises a linear guide rail sliding block fixed at the bottom of the scale body frame, the linear guide rail sliding block is connected with a driven roller mounting plate through a linear guide rail, a roller mounting groove is formed in the driven roller mounting plate, an adjusting screw rod is arranged at one end of the roller mounting groove, a pulley shaft is arranged on the driven roller mounting plate, a needle bearing is fixedly arranged at one end of the pulley shaft through a shaft retainer ring, and a pulley sleeve is sleeved on the needle bearing; the differential pulley assembly comprises a support fixed on the scale body frame, a differential pulley mounting seat is fixed on the support, a differential pulley shaft is mounted in the differential pulley mounting seat through a deep groove ball bearing, a tensioning wheel is arranged at one end of the differential pulley shaft, and a step connected with a steel wire rope is arranged at the other end of the differential pulley shaft.
Advantageous effects
Compared with the prior art, the invention has the following advantages.
The device has the advantages that the device adopts a structure of combining the linear guide rail and the differential pulley, realizes that a lighter tensioning balance weight generates a larger constant tensioning force, and can be used in occasions with large dust.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a three-dimensional schematic of the structure of the present invention;
FIG. 2 is a structural elevation view of the present invention;
FIG. 3 is a front view of the slider assembly of the present invention;
FIG. 4 is a cross-sectional view of a slider assembly of the present invention;
FIG. 5 is a schematic view of a differential wheel assembly according to the present invention;
fig. 6 is a schematic diagram of a differential pulley of the present invention.
Detailed Description
A constant tension automatic tensioner of electronic belt scale belt, including the body frame 2 of the scale, the body frame 2 of the scale is equipped with the initiative roller 1, driven roller 8 below, there are belts 3 between driven roller 8 and the initiative roller 1, as shown in figure 1-6, both ends of the said driven roller 8 have sliding block assemblies 4, the sliding block assembly 4 is installed on both sides of another end of the bottom of the frame 2, the sliding block assembly 4 connects the differential pulley assembly 6 through the wire rope 5, the differential pulley assembly 6 connects and tensions the counter weight 7 through the wire rope 10 for tensioning; the slide block assembly 4 comprises a linear guide rail slide block 403 fixed at the bottom of the scale body frame 2, the linear guide rail slide block 403 is connected with a driven roller mounting plate 404 through a linear guide rail 402, a roller mounting groove 409 is arranged on the driven roller mounting plate 404, an adjusting screw 401 is arranged at one end of the roller mounting groove 409, a pulley shaft 406 is arranged on the driven roller mounting plate 404, a needle roller bearing 408 is fixedly arranged at one end of the pulley shaft 406 through a shaft retainer ring 407, and a pulley sleeve 405 is sleeved on the needle roller bearing 408; the differential pulley assembly 6 comprises a bracket 605 fixed on the scale body frame 2, a differential pulley mounting seat 603 is fixed on the bracket 605, a differential pulley shaft 601 is mounted in the differential pulley mounting seat 603 through a deep groove ball bearing 602, a tension wheel 604 is arranged at one end of the differential pulley shaft 601, and a step connected with a steel wire rope 5 is arranged at the other end of the differential pulley shaft 601.
The tensioning balance weight 7 is a rod type balance weight block, and 2 balance weight adjusting blocks 9 are further sleeved on the tensioning balance weight 7.
The linear guide rail 402 is a square ball linear guide rail, and the linear guide rail 402 and the driven roller mounting plate 404 are fixed into an integral structure.
Examples
The device consists of a driving roller 1, a driven roller 8, a sliding block assembly 4, a differential pulley assembly 6, a tensioning counterweight 7 and a counterweight adjusting block 9.
As shown in fig. 1 and 2, the driving roller 1, the sliding block assembly 4 and the differential pulley assembly 6 are fixed on the scale body frame 2. The belt 3 is sleeved on the driving roller 1 and the driven roller 8. Driven roller 8 installs on slider assembly 4, can remove about slider assembly 4, realizes the tensioning of belt 3. One end of the tension steel wire rope 10 is fixed on the tension wheel 604 of the differential wheel assembly 6, and after the tension steel wire rope is wound for two circles, the other end of the tension steel wire rope is sleeved on the tension counterweight 7. Two balance weight adjusting blocks 9 are installed on the tensioning balance weight 7, and after the balance weight adjusting blocks 9 are replaced, the tensioning force of the belt can be adjusted, and the positions of the two balance weight adjusting blocks 9 on the tensioning balance weight 7 can be adjusted, so that the tensioning force of the two sides of the belt can be adjusted. Two ends of a steel wire rope 5 for the differential pulley are fixed on a step shaft of a differential pulley shaft 601 of the differential pulley component 6, and are respectively sleeved on a pulley sleeve 405 of the sliding block component 4 after being wound on the step shaft for 3-5 circles in the same direction.
As shown in fig. 3 and 4, the slider assembly 4 is composed of an adjusting screw 401, a linear guide 402, a linear guide slider 403, a driven roller mounting plate 404, a pulley sleeve 405, a pulley shaft 406, a shaft retainer 407, and a needle bearing 408. The linear guide rail 402 and the driven roller mounting plate 404 are fixed into a whole, the driven roller mounting plate 404 is provided with a roller mounting groove 409, and the position of the driven roller 8 in the roller mounting groove 409 can be adjusted through the adjusting screw 401. The driven roller mounting plate 404 is provided with a pulley shaft 406, the pulley shaft 406 is provided with a needle bearing 408 and a pulley sleeve 405, and the position of the needle bearing 408 is restricted by a shaft retainer 407. Two linear guide rail sliders 403 are fixed on the scale body frame 2, and the linear guide rail 402 and the linear guide rail sliders 403 are square ball linear guide rails on which dust removal scrapers and the like are arranged, so that the dust removal device has the advantages of small friction coefficient, insensitivity to dust and the like.
Therefore, the driven rollers 8 with two ends installed on the two sliding block assemblies 4 can move left and right flexibly.
As shown in fig. 5, the differential pulley 6 is composed of a differential pulley shaft 601, a deep groove ball bearing 602, a differential pulley mount 603, and a tension pulley 604. The differential pulley shaft 601 and the tension pulley 604 are fastened together by screws and are mounted on the differential pulley mounting base 603 through two deep groove ball bearings 602, and the rotation resistance is small.
The working process is as follows: when the weight of materials on the belt changes or the belt deforms after long-term use to cause the tension of the belt to change, the tension balance state of the sliding block assembly 4 by the steel wire 5 for the differential pulley generated by the original tension of the belt and the tension counter weight 7 is broken, the tension counter weight 7 drives the differential pulley shaft 601 to rotate, the sliding block assembly 4 moves back and forth, and the tension of the belt and the tension of the sliding block assembly 4 by the steel wire 5 for the differential pulley are balanced again. The torque applied to the tension pulley 604 by the tension weight 7 is constant, and the tension of the slider assembly 4 by the steel wire 5 for the differential pulley is constant, so that the belt tension generated by the whole device is constant. As soon as the belt tension changes, the whole process is carried out dynamically in real time. Therefore, the device can automatically realize constant tension tensioning of the belt.
The differential pulley principle of the invention is that the differential pulley is a labor-saving hoisting mechanism consisting of two wheel shafts with different diameters and a movable pulley, as shown in fig. 6, according to the force balance principle, the following can be known:
F×R=1/2×P×（R-r）
so the lever ratio I = 2R/(R-R)
Due to the fact that R is more than R-R, a very large tensioning force can be generated by adopting a very light weight P, and the tensioning force is constant all the time.
Claims (1)
1. A constant tension automatic tensioner of electronic belt scale belt, the apparatus is made up of initiative roller, driven roller, sliding block assembly, differential pulley assembly, tension counter weight and counter weight regulating block, characterized by that, initiative roller, sliding block assembly, differential pulley assembly are mounted and fixed on body frame of the scale; the belt is sleeved on the driving roller and the driven roller; the driven roller is arranged on the sliding block assembly and can move left and right on the sliding block assembly to realize belt tensioning; one end of a steel wire rope for tensioning is fixed on a tensioning wheel of the differential wheel assembly, and after the steel wire rope is wound for two circles, the other end of the steel wire rope is sleeved on a tensioning balance weight; two balance weight adjusting blocks are mounted on the tensioning balance weight, and after the balance weight adjusting blocks are replaced, the tension force of the belt can be adjusted, and the positions of the two balance weight adjusting blocks on the tensioning balance weight can be adjusted, so that the tension force of two sides of the belt can be adjusted; the differential pulley is fixed on a step shaft of a differential pulley shaft of the differential pulley component by two ends of a steel wire rope, and the two ends of the steel wire rope are respectively wound on the step shaft in the same direction for 3-5 circles and then sleeved on a pulley sleeve of the sliding block component; the sliding block component consists of an adjusting screw, a linear guide rail sliding block, a driven roller mounting plate, a pulley sleeve, a pulley shaft, a shaft check ring and a needle roller bearing; the linear guide rail and the driven roller mounting plate are fixed into a whole, a roller mounting groove is formed in the driven roller mounting plate, and the position of the driven roller in the roller mounting groove can be adjusted through the adjusting screw rod; a pulley shaft is arranged on the driven roller mounting plate, a needle bearing and a pulley sleeve are arranged on the pulley shaft, and the position of the needle bearing is limited by a retaining ring for a shaft; two linear guide rail sliding blocks are fixed on the scale body frame, the linear guide rail and the linear guide rail sliding blocks select square ball linear guide rails, and dust removal scraping blades are arranged on the square ball linear guide rails; the differential pulley consists of a differential pulley shaft, a deep groove ball bearing, a differential pulley mounting seat and a tension pulley; the differential pulley shaft and the tension pulley are fastened into a whole by adopting screws and are arranged on the differential pulley mounting seat through two deep groove ball bearings; when in work: when the weight of materials on the belt changes or the belt deforms after long-term use to cause the tension force of the belt to change, the tension balance state of the sliding block assembly by the steel wire for the differential pulley generated by the original tension force of the belt and the tension counter weight is broken, the tension counter weight drives the differential pulley shaft to rotate, and the sliding block assembly moves back and forth to rebalance the tension force of the belt and the tension force of the sliding block assembly by the steel wire for the differential pulley; the torque applied to the tensioning wheel by the tensioning counterweight is constant, and the tension of the sliding block assembly by the steel wire of the differential pulley is constant, so that the tension of the belt generated by the whole device is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910624593.1A CN110426109B (en) | 2019-07-11 | 2019-07-11 | Automatic belt constant-tension tensioning device of electronic belt scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910624593.1A CN110426109B (en) | 2019-07-11 | 2019-07-11 | Automatic belt constant-tension tensioning device of electronic belt scale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110426109A CN110426109A (en) | 2019-11-08 |
| CN110426109B true CN110426109B (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910624593.1A Active CN110426109B (en) | 2019-07-11 | 2019-07-11 | Automatic belt constant-tension tensioning device of electronic belt scale |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB107500A (en) * | 1916-10-10 | 1917-07-05 | John Francis Crowley | Improvements in or relating to Anti-vibration Arrangements for Tension Devices for Driving Belts. |
| JP3702359B2 (en) * | 1999-02-16 | 2005-10-05 | 本田技研工業株式会社 | Blade tensioner |
| CN201434057Y (en) * | 2009-07-07 | 2010-03-31 | 高铁检测仪器（东莞）有限公司 | Belt tensioning device |
| CN102768062B (en) * | 2012-08-06 | 2015-02-11 | 九江七所精密机电科技有限公司 | Modular structure electronic belt weigher |
| CN203323853U (en) * | 2013-05-31 | 2013-12-04 | 徐州徐工筑路机械有限公司 | Simple belt tensioning mechanism of electronic belt conveyor scale |
| CN103896020A (en) * | 2014-04-16 | 2014-07-02 | 江苏江达机械制造有限公司 | Gravity tensioning device of belt conveyor |
| CN204405153U (en) * | 2014-10-30 | 2015-06-17 | 钟志强 | A kind of belted electronic balance conveyer with calibration equipment |
| CN204264858U (en) * | 2014-11-04 | 2015-04-15 | 无锡市丹霄机械有限公司 | A kind of freeze tunnel chain stretching device |
| CN206203262U (en) * | 2016-11-28 | 2017-05-31 | 陕西中烟工业有限责任公司 | For the tensioning apparatus of terrier wash machine guipure |
| CN206246619U (en) * | 2016-12-01 | 2017-06-13 | 丰宁满族自治县万泰能源科技有限公司 | The swelling device of tunnel type drying kiln driving chain |
| CN207485980U (en) * | 2017-11-27 | 2018-06-12 | 佛山市盒之源机械设备有限公司 | Adjustable tensioner |
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- 2019-07-11 CN CN201910624593.1A patent/CN110426109B/en active Active
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