CN110940401A - Small-range belt scale and method for improving weighing precision - Google Patents
Small-range belt scale and method for improving weighing precision Download PDFInfo
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- CN110940401A CN110940401A CN202010022059.6A CN202010022059A CN110940401A CN 110940401 A CN110940401 A CN 110940401A CN 202010022059 A CN202010022059 A CN 202010022059A CN 110940401 A CN110940401 A CN 110940401A
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- 238000005303 weighing Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
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- Structure Of Belt Conveyors (AREA)
Abstract
The invention relates to a small-range belt scale and a method for improving weighing precision, comprising a base, a lever device arranged on the base and a conveyor belt arranged above the lever device, wherein the conveyor belt is arranged on a frame, the frame is a sheet metal part formed by stamping and bending a metal sheet, a plurality of hollow parts are arranged on the frame, the lever comprises a lever, a cross rod is arranged above the tail end of a power arm of the lever, the cross rod is connected with the frame, a weighing sensor is arranged below the tail end of the power arm of the lever, the weighing sensor is arranged on the base, a balancing weight is arranged at the tail end of a resistance arm of the lever, a fulcrum used for supporting the lever is arranged on the base, the fulcrum is close to the balancing weight and is far away from the weighing sensor, the belt scale can reduce the bearing pressure of the weighing sensor during no-load, is suitable for weighing occasions with large ratio of tare weight, the weighing precision of the weighing sensor is effectively improved.
Description
Technical Field
The invention relates to a small-range belt scale and a method for improving weighing precision.
Background
The belt weigher is a metering device with the functions of conveying and weighing simultaneously, can automatically weigh materials on line, can be integrated with various packaging production lines and conveying production lines, is applied to various industries, such as food, medicine, plastics, rubber and the like, is suitable for rechecking the weight of products in the final link of product production so as to ensure that the weight of the products delivered from a factory meets the requirement, and simultaneously can output a feedback signal to packaging and filling equipment according to the difference value of the average weight and the nominal weight to automatically adjust the packaging and filling weight of the products so as to ensure that the packaging and filling weight meets the nominal weight, thereby reducing the production cost and improving the labor productivity. The existing belt weigher has large self weight and influences the weighing precision of materials, and particularly has great influence on the weighing precision due to the dead weight of the belt weigher on weighing occasions with large ratio of the tare weight to the material weight and small load.
Disclosure of Invention
The invention provides a small-range belt scale and a method for improving weighing precision.
The invention solves the technical problem by adopting the scheme that the small-range belt scale comprises a base, a lever device arranged on the base and a conveyor belt positioned above the lever device, wherein the conveyor belt is arranged on a rack and is a sheet metal part formed by stamping and bending a metal sheet, and a plurality of hollow parts are arranged on the rack;
the lever device comprises a lever, a cross rod is installed above the tail end of a power arm of the lever and connected with the rack, a weighing sensor is arranged below the tail end of the power arm of the lever, the weighing sensor is installed on the base, a balancing weight is installed at the tail end of a resistance arm of the lever, a fulcrum used for supporting the lever is installed on the base, and the fulcrum is close to the balancing weight and far away from the weighing sensor.
Further, the weighing sensor is arranged on the base through a cantilever.
Furthermore, the conveyor belt comprises a driving roller assembly and a driven roller assembly which are arranged on the rack, the driving roller assembly and the driven roller assembly are in transmission through the conveyor belt, and the driving roller assembly is driven to rotate by a motor arranged on the rack.
Furthermore, the driving roller assembly comprises a driving shaft, a driving roller, a motor and a motor seat, the motor is embedded in the motor seat, a rotating shaft of the motor is connected with one end of the driving shaft through a coupler for transmission, the other end of the driving shaft is in running fit with the rack, one end of the motor seat extends into the driving roller, the other end of the motor seat is installed on the rack and locked by a bolt, and the driving roller is sleeved on the driving shaft and is in interference fit with the driving shaft.
Further, the circumference outside cover of motor cabinet is equipped with self-aligning bearing, self-aligning bearing installs and is used for holding in the hole of motor cabinet on the initiative cylinder.
Furthermore, an end cover A is arranged at the other end of the driving shaft and is locked on the rack through a locking bolt, and a bearing is arranged between the driving shaft and the end cover A.
Furthermore, the driven roller assembly comprises a driven shaft and a driven roller, the driven roller is mounted on the driven shaft through a bearing, end covers B are arranged at two ends of the driven shaft, strip holes for accommodating the end portions of the driven shaft are transversely formed in the end covers B, the end covers B are locked on the rack through thick adjusting bolts, threaded holes are radially formed in the end portions of the driven shaft, transverse fine adjusting bolts are connected to the end covers in a screwed mode, the inner ends of the fine adjusting bolts extend into the strip holes and are in threaded fit with the threaded holes, strip-shaped through holes are formed in the rack, and the adjusting bolts penetrate through the strip-shaped through holes.
Furthermore, the middle of the driven shaft is a hollow pipe, the two ends of the driven shaft are welded with solid round shafts, and threaded holes are formed in the solid round shafts.
A method for improving the weighing precision of a small-range belt scale comprises the following steps: the conveyor belt is fixed on the power arm of the lever through the cross rod, most of weight is offset through the counter weight on the resistance arm, the acting force of the symmetrical weight sensor of the belt scale is reduced when the conveyor belt is in no-load, and certain pre-tightening force of the symmetrical weight sensor of the conveyor belt is guaranteed, so that the conveyor belt, the lever device and the weighing sensor are always in close contact; when the conveyer is loaded, most of acting force borne by the weighing sensor comes from the gravity of the materials, so that the weighing precision of the materials is improved.
Compared with the prior art, the invention has the following beneficial effects: simple structure, reasonable in design can reduce the bearing pressure of weighing sensor when empty load, is applicable to the occasion of weighing that the ratio of tare weight and material is big, the load is little, can effectively avoid belt weigher self weight to the influence of material weighing precision, improves weighing sensor's weighing precision effectively.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is an assembly view of a belt scale;
FIG. 2 is a front view of the active roller structure;
FIG. 3 is a left side view of the active roller structure;
FIG. 4 is a right side view of the active roller structure;
FIG. 5 is a front view of the driven roller arrangement;
fig. 6 is a left side view of the driven roller structure.
In the figure: 1-base, 2-balancing weight, 3-driven roller component, 4-fulcrum, 5-lever, 6-lever power arm, 7-cross bar, 8-weighing sensor, 9-conveyor belt, 10-belt, 11-driving roller component, 12-end cover A, 13-sleeve, 14-driving roller, 15-driving shaft, 16-coupler, 17-self-aligning bearing, 18-motor base, 19-motor, 20-frame, 21-locking bolt, 22-locking nut, 23-end cover B on one side, 24-driven roller, 25-driven shaft, 26-fine adjusting bolt, 27-end cover B on the other side, 28-coarse adjusting bolt and 29-through hole.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-6, a small-range belt scale comprises a base, a lever device mounted on the base, and a conveyor belt located above the lever device, wherein the conveyor belt is mounted on a rack, the rack is a sheet metal part formed by stamping and bending a metal sheet for reducing the dead weight, and a plurality of hollow parts are formed in the rack;
the lever device includes the lever, the horizontal pole is installed to the terminal top of power arm of lever, the horizontal pole is connected with the frame, the terminal below of power arm of lever is provided with weighing sensor, weighing sensor installs on the base, the balancing weight is installed to the resistance arm end of lever, install the fulcrum that is used for supporting the lever on the base, the fulcrum is close to the balancing weight, keep away from weighing sensor, lever device's power is derived from installing the conveyer belt in the lever top and installing the weighing sensor in the lever below, lever device's resistance is derived from installing the balancing weight at the lever other end, the size of the adjustable resistance arm of balancing weight.
In this embodiment, the weighing sensor is mounted on the base through the cantilever, and when the belt scale operates in no-load mode, the lever still has a vertical downward pre-tightening force for the weighing sensor, so that the lever and the weighing sensor are always in close contact with each other
In this embodiment, the conveyor belt comprises a driving roller assembly and a driven roller assembly which are arranged on the frame, the driving roller assembly and the driven roller assembly are in belt transmission, and the driving roller assembly is driven to rotate by a motor arranged on the frame.
In this embodiment, the initiative cylinder subassembly includes driving shaft, initiative cylinder, motor cabinet, and the motor is embedded in the motor cabinet, and the pivot of motor is connected the transmission through shaft coupling and driving shaft one end, and the driving shaft other end and frame normal running fit, motor cabinet one end stretch into in the initiative cylinder, and the other end is installed in the frame to by the bolt locking, initiative cylinder suit is on the driving shaft and with it interference fit.
In this embodiment, the circumference outside cover of motor cabinet is equipped with self-aligning bearing, self-aligning bearing installs and is used for holding in the hole of motor cabinet on the initiative cylinder to guarantee that the initiative cylinder does not interfere with the motor cabinet mutually, and bear the radial force of initiative cylinder.
In this embodiment, the other end of the driving shaft is provided with an end cover a, the end cover a is locked on the frame through a locking bolt, and a bearing is arranged between the driving shaft and the end cover a.
In this embodiment, the driven roller assembly includes a driven shaft and a driven roller, the driven roller is mounted on the driven shaft through a bearing, end caps B are disposed at two ends of the driven shaft, a strip hole for accommodating an end portion of the driven shaft is transversely formed in each end cap B, the end caps B are locked to the frame through a coarse adjustment bolt, a threaded hole is radially formed in an end portion of the driven shaft, a transverse fine adjustment bolt is screwed to each end cap, an inner end of the fine adjustment bolt extends into the strip hole and is in threaded fit with the threaded hole, a strip-shaped through hole is formed in the frame, the adjustment bolt penetrates through the strip-shaped through hole, the coarse adjustment bolt can coarsely adjust a distance between the driven shaft and the driving shaft in the through hole, and the distance between the driven shaft and the driving shaft can be.
In this embodiment, the middle of the driven shaft is a hollow pipe, the two ends of the driven shaft are welded with solid round shafts, and threaded holes are formed in the solid round shafts.
A method for improving the weighing precision of a small-range belt scale comprises the following steps: the conveyor belt is fixed on the power arm of the lever through the cross rod, most of weight is offset through the counter weight on the resistance arm, the acting force of the symmetrical weight sensor of the belt scale is reduced when the conveyor belt is in no-load, and certain pre-tightening force of the symmetrical weight sensor of the conveyor belt is guaranteed, so that the conveyor belt, the lever device and the weighing sensor are always in close contact; when the conveyer is loaded, most of acting force borne by the weighing sensor comes from the gravity of the materials, so that the weighing precision of the materials is improved.
This small-scale belt weigher passes through lever means and light-weighted conveyer and mutually supports, has reduced the bearing pressure of weighing sensor when no-load. The small-range belt scale is suitable for weighing occasions with large tare weight to material weight ratio and small load, can avoid the influence of the self weight of the belt scale on the weighing precision of materials, and effectively improves the weighing precision of the weighing sensor. This small-range belt weigher places the motor in the initiative cylinder structure, can reduce the transmission structure of motor, alleviates the belt weigher dead weight, and the overall arrangement is simple, and the reduction space occupies. This small-range belt weigher adjusts the interval of driven shaft and driving shaft through designing thick, thin adjusting bolt, realizes the accurate tensioning to the belt, adopts hidden design simultaneously, guarantees that the belt weigher appearance is pleasing to the eye.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A small-range belt scale is characterized in that: the conveying belt is arranged on a rack, the rack is a sheet metal part formed by stamping and bending a metal sheet, and a plurality of hollow parts are formed in the rack;
the lever device comprises a lever, a cross rod is installed above the tail end of a power arm of the lever device and connected with the rack, a weighing sensor is arranged below the tail end of the power arm of the lever, the weighing sensor is installed on the base, a balancing weight is installed at the tail end of a resistance arm of the lever, a fulcrum used for supporting the lever is installed on the base, and the fulcrum is close to the balancing weight and far away from the weighing sensor.
2. The small-range belt scale of claim 1, wherein: the weighing sensor is arranged on the base through a cantilever.
3. The small-range belt scale of claim 1, wherein: the conveyer belt is including installing initiative cylinder subassembly, the driven roller subassembly in the frame, and the transmission of belt between initiative cylinder subassembly, the driven roller subassembly, initiative cylinder subassembly is rotated by the motor drive of installing in the frame.
4. The small-range belt scale of claim 3, wherein: the driving roller assembly comprises a driving shaft, a driving roller, a motor and a motor base, the motor is embedded in the motor base, a rotating shaft of the motor is connected with one end of the driving shaft through a coupler for transmission, the other end of the driving shaft is in running fit with the rack, one end of the motor base extends into the driving roller, the other end of the motor base is installed on the rack and locked by a bolt, and the driving roller is sleeved on the driving shaft and in interference fit with the driving shaft.
5. The small-range belt scale of claim 4, wherein: the circumference outside cover of motor cabinet is equipped with self-aligning bearing, self-aligning bearing installs and is used for holding in the hole of motor cabinet on the initiative cylinder.
6. The small-range belt scale of claim 4, wherein: the other end of the driving shaft is provided with an end cover A, the end cover A is locked on the rack through a locking bolt, and a bearing is arranged between the driving shaft and the end cover A.
7. The small-range belt scale of claim 4, wherein: the driven roller assembly comprises a driven shaft and a driven roller, the driven roller is mounted on the driven shaft through a bearing, end covers B are arranged at two ends of the driven shaft, strip holes for containing the end portions of the driven shaft are transversely formed in the end covers B, the end covers B are locked on the rack through thick adjusting bolts, threaded holes are formed in the end portions of the driven shaft in the radial direction, transversely-arranged fine adjusting bolts are connected onto the end covers in a screwed mode, the inner ends of the fine adjusting bolts extend into the strip holes and are in threaded fit with the threaded holes, strip-shaped through holes are formed in the rack, and the adjusting bolts penetrate through the strip-shaped.
8. The small-range belt scale of claim 3, wherein: the middle of the driven shaft is a hollow pipe, the two ends of the driven shaft are welded with solid round shafts, and threaded holes are formed in the solid round shafts.
9. A method for improving the weighing accuracy of a small-scale belt scale according to claim 7, wherein the method comprises the following steps: the conveyor belt is fixed on the power arm of the lever through the cross rod, most of weight is offset through the counter weight on the resistance arm, the acting force of the symmetrical weight sensor of the belt scale is reduced when the conveyor belt is in no-load, and certain pre-tightening force of the symmetrical weight sensor of the conveyor belt is guaranteed, so that the conveyor belt, the lever device and the weighing sensor are always in close contact; when the conveyer is loaded, most of acting force borne by the weighing sensor comes from the gravity of the materials, so that the weighing precision of the materials is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022059.6A CN110940401A (en) | 2020-01-09 | 2020-01-09 | Small-range belt scale and method for improving weighing precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022059.6A CN110940401A (en) | 2020-01-09 | 2020-01-09 | Small-range belt scale and method for improving weighing precision |
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| Publication Number | Publication Date |
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| CN110940401A true CN110940401A (en) | 2020-03-31 |
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| CN202010022059.6A Pending CN110940401A (en) | 2020-01-09 | 2020-01-09 | Small-range belt scale and method for improving weighing precision |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020144844A1 (en) * | 2001-04-09 | 2002-10-10 | Nachtigal Chester L. | Portable belt scale |
| CN2901259Y (en) * | 2006-06-01 | 2007-05-16 | 江苏赛摩集团有限公司 | Electronic belt scale |
| CN201434722Y (en) * | 2009-06-09 | 2010-03-31 | 深圳市科尔达电气设备有限公司 | Belt sweeping device for full-suspension high-precision electronic belt scale |
| CN109556699A (en) * | 2018-11-27 | 2019-04-02 | 长安大学 | A kind of method of material impact active force suffered by determining stylobate formula weighing belt |
| CN209027645U (en) * | 2018-11-22 | 2019-06-25 | 徐州市金鑫科技有限公司 | A kind of weighing belt that weighing precision is high |
| CN211234650U (en) * | 2020-01-09 | 2020-08-11 | 福州大学 | Small measuring range belt scale |
-
2020
- 2020-01-09 CN CN202010022059.6A patent/CN110940401A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020144844A1 (en) * | 2001-04-09 | 2002-10-10 | Nachtigal Chester L. | Portable belt scale |
| CN2901259Y (en) * | 2006-06-01 | 2007-05-16 | 江苏赛摩集团有限公司 | Electronic belt scale |
| CN201434722Y (en) * | 2009-06-09 | 2010-03-31 | 深圳市科尔达电气设备有限公司 | Belt sweeping device for full-suspension high-precision electronic belt scale |
| CN209027645U (en) * | 2018-11-22 | 2019-06-25 | 徐州市金鑫科技有限公司 | A kind of weighing belt that weighing precision is high |
| CN109556699A (en) * | 2018-11-27 | 2019-04-02 | 长安大学 | A kind of method of material impact active force suffered by determining stylobate formula weighing belt |
| CN211234650U (en) * | 2020-01-09 | 2020-08-11 | 福州大学 | Small measuring range belt scale |
Non-Patent Citations (1)
| Title |
|---|
| 张加营, 张兄华: "小流量电子皮带秤", 衡器, no. 06 * |
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