CN109470349B - Centering weighing device and weighing method - Google Patents

Centering weighing device and weighing method Download PDF

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Publication number
CN109470349B
CN109470349B CN201811341600.9A CN201811341600A CN109470349B CN 109470349 B CN109470349 B CN 109470349B CN 201811341600 A CN201811341600 A CN 201811341600A CN 109470349 B CN109470349 B CN 109470349B
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China
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base
weighing
piece
loading frame
loading
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CN201811341600.9A
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CN109470349A (en
Inventor
熊忠琪
余培英
苏祎
程丽苑
陈平
刘佳鑫
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Shanghai Institute Of Measurement And Testing Technology (east China National Metrology And Testing Center Shanghai Metrology Compulsory Certification Center China Shanghai Testing Center)
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Shanghai Institute Of Measurement And Testing Technology (east China National Metrology And Testing Center Shanghai Metrology Compulsory Certification Center China Shanghai Testing Center)
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Priority to CN201811341600.9A priority Critical patent/CN109470349B/en
Publication of CN109470349A publication Critical patent/CN109470349A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01GWEIGHING
    • G01G21/00Details of weighing apparatus
    • G01G21/22Weigh pans or other weighing receptacles; Weighing platforms

Abstract

The invention discloses a centering weighing device and a weighing method, and relates to the field of metering. The method comprises the following steps: the device comprises a base, wherein a centering assembly is arranged on the base, a weighing disc for weighing a piece to be measured is arranged on the centering assembly, and the centering assembly is used for adjusting an included angle between the weighing disc and the base; the supporting structure is arranged on the weighing disc, a supporting gap is arranged on the supporting structure, and the width of the supporting gap is smaller than that of the piece to be measured; the loading frame is detachably connected to the base and comprises a loading platform for supporting the piece to be tested; when the loading frame is arranged on the base, the loading platform is arranged in the supporting gap, and the distance between one side of the loading platform, which is far away from the base, and the base is smaller than the distance between one side of the supporting structure, which is far away from the base, and the base. The possibility of unbalance loading error of the piece to be measured is reduced, and the weighing accuracy and stability of the piece to be measured are improved.

Description

Centering weighing device and weighing method
Technical Field
The invention relates to the field of metering, in particular to a centering weighing device and a weighing method.
Background
The mass comparator is an electronic weighing device manufactured according to the principle of measuring deformation and strain of an elastic element or electromagnetic force feedback balance. The mass difference value measuring device is mainly used for measuring mass difference values based on an ABA or ABBA circulating mode and is used for high-resolution electronic weighing equipment for weight transfer or other special test purposes.
At present, the unbalance loading error is a problem to be solved urgently in the field of measurement, and the unbalance loading error refers to an error generated when the gravity center of a weight deviates from the center of a weighing scale of a mass comparator. When a user puts a piece to be measured on the weighing plate, the center of the piece to be measured and the center of the weighing plate are difficult to be in the same position, so that an unbalance loading error is caused, and the weighing accuracy and stability of the piece to be measured are reduced.
Disclosure of Invention
The invention aims to provide a centering weighing device and a weighing method, which reduce the possibility of unbalance loading error of a piece to be measured and increase the weighing accuracy and stability of the piece to be measured.
The technical scheme provided by the invention is as follows:
a centered weighing apparatus comprising: the device comprises a base, wherein a centering assembly is arranged on the base, a weighing disc for weighing a piece to be measured is arranged on the centering assembly, and the centering assembly is used for adjusting an included angle between the weighing disc and the base; the supporting structure is arranged on the weighing disc, a supporting gap is arranged on the supporting structure, and the width of the supporting gap is smaller than that of the piece to be measured; the loading frame is detachably connected to the base and comprises a loading platform for supporting the piece to be tested; when the loading frame is arranged on the base, the loading platform is arranged in the supporting gap, and the distance between one side of the loading platform, which is far away from the base, and the base is smaller than the distance between one side of the supporting structure, which is far away from the base, and the base.
In the technical scheme, through the limitation of the height of the loading platform and the supporting structure and the loading frame which is detachably connected, the piece to be tested can move from the loading platform to the supporting structure in the process that the loading frame moves along the direction close to the base, so that the piece to be tested is separated from the loading platform; through the setting of centering subassembly, realized the regulation of a focus position that awaits measuring to through the loading frame of motion, when moving to the direction of keeping away from the base once more, the focus position of the piece that awaits measuring can change, realized the centering of the piece that awaits measuring and weighed, reduced the possibility that the piece that awaits measuring produced the unbalance loading error, increased the degree of accuracy and the stability that the piece that awaits measuring weighed.
Further, the centering assembly comprises a roller and a sliding seat; the rollers are rotationally arranged on the base along the axis direction of the rollers, the rollers are arranged into two groups, and the axes of the two groups of rollers are parallel; the sliding seats are arranged on the weighing plate and comprise abutting surfaces abutting against the rollers, the abutting surfaces are obliquely arranged, the sliding seats are arranged into two groups, and the inclining directions of the abutting surfaces of the two groups of sliding seats are opposite.
Among this technical scheme, when the piece that awaits measuring is placed on bearing structure, the holding power that two sliding seats received changes, and the weighing dish is under the action of gravity, and the sliding seat butt has all the time in the gyro wheel, has realized the change of weighing dish focus, and the holding power that receives up to two sets of sliding seats is balanced with the gravity of the piece that awaits measuring, weighing dish, and the deflection of weighing dish has been realized to the centering subassembly.
Further, the distance between the axes of the two groups of rollers and the center of the weighing pan is the same.
Among this technical scheme, the gyro wheel of the same size can be selected to two sets of gyro wheels, and when the piece that awaits measuring is not installed to the weighing pan, the weighing pan can be the horizontality, has increased the stability of weighing pan, has reduced the inclined possibility of weighing pan.
Further, each group of sliding seat sets up to a plurality ofly, and every group of quantity of sliding seat is the same with every group quantity of gyro wheel.
Among this technical scheme, through the injeciton of sliding seat and gyro wheel quantity, increased the restraint between centering subassembly and the weighing dish, reduced the possibility that the weighing dish rocked on centering subassembly, increased the stability of weighing dish.
Furthermore, the distance between the abutting surfaces of the two groups of sliding seats and one end close to the base is smaller than the distance between the abutting surfaces of the two groups of sliding seats and one end far away from the base.
Among this technical scheme, through the injeciton of sliding seat shape, the user of being convenient for directly with two sliding seat butt of weighing plate lower extreme on two gyro wheels, made things convenient for user's operation.
Further, the centering assembly further comprises: the abutting block is arranged on the base and used for abutting the sliding seat; when the piece to be tested is not placed on the supporting structure, a space is arranged between the abutting block and the sliding seat.
In the technical scheme, in the process that the centering assembly controls the weighing pan to incline, the sliding seat can abut against the abutting block through the arrangement of the abutting block, so that the possibility of continuous movement of the sliding seat is reduced, the possibility of movement of the weighing pan is further driven, the possibility of excessive deflection of the weighing pan is reduced, and the reliability of the deflection process of the weighing pan is improved; through the arrangement of the distance, the tilting action of the weighing pan can be realized.
Further, when the sliding seat is abutted to the abutting block, an included angle between the weighing disc and the base is 1-3 degrees.
Among this technical scheme, when butt through the sliding seat butt on the butt, the sliding seat is in extreme position to through the contained angle between control weighing plate and the base, reduced the possibility that the piece that awaits measuring slided on bearing structure, increased the stability of the piece that awaits measuring on bearing structure.
Further, when the weighing pan is tilted, the distance between the side of the loading platform away from the base and the base is smaller than the minimum distance between the side of the support structure away from the base and the base.
In the technical scheme, by limiting the height of the loading platform and the supporting structure under the inclined state of the weighing disk, when the loading frame is arranged on the base, the piece to be measured is completely separated from the loading platform, the piece to be measured can be completely supported by the supporting structure, the weighing disk can acquire the mass of the piece to be measured containing unbalance loading errors, and a user can conveniently obtain the approximate range of the mass of the piece to be measured.
Further, when the loading frame is arranged on the base, a gap is formed between the loading platform and the supporting structure.
In the technical scheme, the constraint between the loading frame and the supporting structure is reduced through the limitation of the position of the loading frame, the possibility of interference between the supporting structure and the loading frame when the centering assembly drives the weighing pan to incline is reduced, and the reliability and the stability of the inclination process of the weighing pan are improved; the influence of the loading frame on the piece to be measured is reduced when the weighing plate is used for weighing the piece to be measured, and the weighing accuracy and stability of the piece to be measured are improved.
It is also an object of the present invention to provide a weighing method comprising: placing the piece to be tested in a loading frame; moving the loading frame downwards along the vertical direction, and installing the loading frame on a base; analyzing whether an included angle between the weighing plate and the base is smaller than a preset included angle or not; when the included angle between the weighing disc and the base is smaller than a preset included angle, the weighing of the piece to be measured is finished; and when the included angle between the weighing plate and the base is larger than or equal to a preset included angle, the loading frame is moved upwards along the vertical direction until the piece to be measured is separated from the supporting structure, the step is executed again, the loading frame is moved downwards along the vertical direction, and the loading frame is installed on the base.
In the technical scheme, through the limitation of the height of the loading platform and the supporting structure and the loading frame which is detachably connected, the piece to be tested can move from the loading platform to the supporting structure in the process that the loading frame moves along the direction close to the base, so that the piece to be tested is separated from the loading platform; through the setting of centering subassembly, realized the regulation of a focus position that awaits measuring to through the loading frame of motion, when moving to the direction of keeping away from the base once more, the focus position of the piece that awaits measuring can change, realized the centering of the piece that awaits measuring and weighed, reduced the possibility that the piece that awaits measuring produced the unbalance loading error, increased the degree of accuracy and the stability that the piece that awaits measuring weighed.
Compared with the prior art, the centering weighing device and the weighing method provided by the invention have the following beneficial effects:
1. through the limitation of the height of the loading platform and the supporting structure and the loading frame detachably connected, in the process that the loading frame moves along the direction close to the base, the piece to be tested can move to the supporting structure from the loading platform, and the separation of the piece to be tested and the loading platform is realized.
2. Through the setting of centering subassembly, realized the regulation of a focus position that awaits measuring to through the loading frame of motion, when moving to the direction of keeping away from the base once more, the focus position of the piece that awaits measuring can change, realized the centering of the piece that awaits measuring and weighed, reduced the possibility that the piece that awaits measuring produced the unbalance loading error, increased the degree of accuracy and the stability that the piece that awaits measuring weighed.
3. The centering assembly controls the inclination process of the weighing pan, and the sliding seat can be abutted to the abutting block through the abutting block, so that the possibility of continuous movement of the sliding seat is reduced, the possibility of movement of the weighing pan is further driven, the possibility of excessive deflection of the weighing pan is reduced, and the reliability of the deflection process of the weighing pan is improved.
4. When butt joint is gone up through the sliding seat butt, the sliding seat is in extreme position to through the contained angle between control weighing plate and the base, reduced the possibility that the piece that awaits measuring slided on bearing structure, increased the stability of the piece that awaits measuring on bearing structure.
Drawings
The above features, technical features, advantages and modes of realisation of a centering and weighing device and a weighing method will be further described in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.
FIG. 1 is a schematic diagram of a centering and weighing apparatus according to the present invention;
FIG. 2 is a schematic diagram of a centering assembly and a support structure of a centering and weighing apparatus according to the present invention;
FIG. 3 is a side view of a centering and weighing apparatus of the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
fig. 5 is a schematic flow chart of a centering and weighing method.
The reference numbers illustrate: 10. the device comprises a base, 20 parts of a centering assembly, 21 parts of rollers, 22 parts of sliding seats, 23 parts of abutting blocks, 30 parts of supporting structures, 31 parts of supporting gaps, 32 parts of fork toothed plates, 33 parts of inserting grooves, 40 parts of loading frames, 41 parts of loading tables, 42 parts of outer frames, 43 parts of hanging rings, 50 parts of weighing discs, 60 parts of guiding structures and 61 parts of placing grooves.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
According to an embodiment of the present invention, as shown in fig. 1 to 4, a centering and weighing device includes a base 10, the base 10 is disposed at the lowermost end, and the base 10 can be horizontally placed on the ground; be equipped with centering assembly 20 on the base 10, be equipped with the weighing pan 50 that is used for weighing the piece that awaits measuring on centering assembly 20, the piece that awaits measuring is placed on weighing pan 50 after, and weighing pan 50 can weigh the piece that awaits measuring, obtains the quality of the piece that awaits measuring.
The weighing pan 50 can be placed horizontally on the centering assembly 20, and the centering assembly 20 can be used to adjust the angle between the weighing pan 50 and the base 10, specifically, the centering assembly 20 can be any mechanism that rotates in a vertical plane to achieve the angle between the centering assembly 20 and the base 10.
The weighing pan 50 is provided with a support structure 30, the support structure 30 is provided with a support gap 31, the support gap 31 can be set to be one or more, and the width of the support gap 31 is smaller than that of the piece to be measured.
The base 10 is further provided with a loading frame 40, the loading frame 40 can be detachably connected to the base 10, a loading table 41 is included in the loading frame 40, and the loading table 41 can be used for supporting the to-be-tested piece.
When the loading frame 40 is disposed on the base 10, the loading table 41 can be disposed in the support gap 31, and a distance between a side of the loading table 41 away from the base 10 and the base 10 is smaller than a distance between a side of the support structure 30 away from the base 10 and the base 10, that is, an upper side of the loading table 41 is lower than an upper side of the support structure 30.
When a user needs to weigh the piece to be measured, the piece to be measured is placed in the loading frame 40 taken down from the base 10, namely, the piece to be measured is placed on the loading table 41, the gravity center of the piece to be measured is controlled to be as close to the center of the loading frame 40 as possible, and the piece to be measured is placed completely.
The loading frame 40 is moved to the upper side of the support structure 30 and is placed downward on the base 10, and during the placing, since the upper side of the loading table 41 is lower than the upper side of the support structure 30, the dut can be simultaneously abutted on the loading table 41 and the support structure 30 when the upper side of the loading table 41 is flush with the upper side of the support structure 30.
When the loading frame 40 continues to move downwards until the loading frame 40 is mounted on the base 10, the to-be-measured object is separated from the loading table 41, the support structure 30 supports the to-be-measured object, and when the center of gravity of the to-be-measured object is not at the same position as the center of gravity of the weighing pan 50, since the center of gravity of the weighing pan 50 is located at the center of the centering assembly 20, that is, when the center of gravity of the to-be-measured object is not at the center of the centering assembly 20, the center of gravity of the combination of the to-be-measured object and the weighing pan 50 is not at the center of the centering assembly 20, the centering assembly 20 can adjust the included angle between the weighing pan 50 and the base 10, and thus the center of gravity of the combination of the to-be-measured object and the weighing pan 50, until the center of the combination of the to-be-measured object and the weighing pan 50 is located at the center of the centering assembly 20, that is, that the weighing pan 50 is adjusted to be inclined.
After the above state is stable, the loading frame 40 is moved vertically upwards, the weighing pan 50 is restored to the horizontal state under the action of the centering assembly 20, that is, the gravity center of the weighing pan 50 is located at the center of the centering assembly 20, in the current state, the position of the to-be-measured object is changed once, the distance between the gravity center of the to-be-measured object and the center of the centering assembly 20 is reduced, and the above steps are executed again.
When a user places the loading frame 40 with the piece to be measured on the base 10, the user can determine whether the gravity center of the piece to be measured meets the requirement and whether the unbalance loading error caused in the current state can be accepted by observing the included angle between the weighing pan 50 and the base 10, namely the inclination degree of the weighing pan 50, and the gravity center can be used as a basis for weighing again.
In this embodiment, through the limitation of the height between the loading platform 41 and the supporting structure 30 and the loading frame 40 detachably connected, in the process that the loading frame 40 moves in the direction close to the base 10, the to-be-tested piece can move from the loading platform 41 to the supporting structure 30, so that the to-be-tested piece is separated from the loading platform 41; through the setting of centering subassembly 20, realized the regulation of a piece focus position that awaits measuring to through the loading frame 40 of motion, when moving to the direction of keeping away from base 10 once more, the focus position of the piece that awaits measuring can change, realized the centering of the piece that awaits measuring and weighed, reduced the piece that awaits measuring and produced the possibility of unbalance loading error, increased the degree of accuracy and the stability that the piece that awaits measuring weighed.
According to a modification of the above embodiment, in the present embodiment, when the weighing pan 50 is tilted, the distance between the side of the loading table 41 away from the base 10 and the base 10 is smaller than the minimum distance between the side of the support structure 30 away from the base 10 and the base 10, that is, when the centering assembly 20 controls the weighing pan 50 to tilt because the center of gravity of the object to be measured is not at the same position as the center of the centering assembly 20, the upper side of the loading table 41 is still horizontal, but the upper side of the support structure 30 following the weighing pan 50 is tilted, and the upper side of the loading table 41 can still be lower than the lowest end of the upper side of the support structure 30.
In this embodiment, by limiting the height of the loading platform 41 and the supporting structure 30 in the inclined state of the weighing pan 50, when the loading frame 40 is disposed on the base 10, the to-be-measured object is completely separated from the loading platform 41, the to-be-measured object can be completely supported by the supporting structure 30, the weighing pan 50 can obtain the mass of the to-be-measured object containing the unbalance loading error, and a user can conveniently obtain the approximate range of the mass of the to-be-measured object.
According to the modification of the above embodiment, in the present embodiment, when the loading frame 40 is disposed on the base 10, a gap is provided between the loading platform 41 and the support structure 30, that is, the left and right sides of the loading platform 41 are separated from the support structures 30 at both sides thereof, and the lower end of the loading platform 41 is separated from the support structures 30. By limiting the position of the loading frame 40, the constraint between the loading frame 40 and the supporting structure 30 is reduced, the possibility of interference between the supporting structure 30 and the loading frame 40 when the centering assembly 20 drives the weighing pan 50 to tilt is reduced, and the reliability and stability of the tilting process of the weighing pan 50 are improved; the influence of the loading frame 40 on the piece to be measured is reduced when the weighing plate 50 is used for weighing the piece to be measured, and the weighing accuracy and stability of the piece to be measured are improved.
Specifically, the object to be measured in this embodiment may be an object to be measured, or may be a standard weight, and when the object to be measured is a standard weight, the calibration of the weighing pan 50 may also be realized by the apparatus.
In this embodiment, the supporting structure 30 includes the forked tooth plate 32, the forked tooth plate 32 can be provided in plurality, and a plurality of forked tooth plates 32 can be provided on the weighing pan 50 along the direction perpendicular to the weighing pan 50, that is, the forked tooth plate 32 can be vertically provided on the weighing pan 50, and a plurality of forked tooth plates 32 are parallel to each other, and a supporting gap 31 can be formed between adjacent forked tooth plates 32, and preferably, the intervals between adjacent forked tooth plates 32 are the same, that is, the widths of the plurality of supporting gaps 31 are the same.
Through the setting of fork pinion rack 32, can form support clearance 31, realized then that loading platform 41 sets up the function in supporting clearance 31, and the fork pinion rack 32 of arranging the setting can be used for supporting the weight, and fork pinion rack 32 also has great structural strength, has increased bearing structure 30's stability.
One side that base 10 was kept away from to weighing dish 50 is equipped with a plurality of slots 33, and prong board 32 can be pegged graft in slot 33, and prong board 32 can detachably connect on weighing dish 50 promptly, and the structure and the installation of the prong board 32 of being convenient for also can be when prong board 32 damages, conveniently change, and to the object to be measured of different states, the user also can select different prong boards 32, has increased weighing dish 50's application scope.
In this embodiment, the loading frame 40 further includes an outer frame 42 disposed outside the loading platform 41, the loading platform 41 can be disposed inside a lower end of the outer frame 42, a hanging ring 43 is further disposed at an upper end of the outer frame 42, and a user can hang or drop the loading frame 40 through the hanging ring 43.
According to the modification of the above embodiment, in the present embodiment, the base 10 is provided with a plurality of guide structures 60, the guide structures 60 are provided with placing grooves 61 for placing the loading frame 40, and the shape formed by the plurality of guide structures 60 is the same as the shape of the bottom surface of the loading frame 40. In this embodiment, the bottom surface of the loading frame 40 is rectangular, so that four guide structures 60 can be provided, and four guide structures 60 can surround to form a rectangle, and the shape and size of the formed rectangle are the same as those of the rectangular frame. Therefore, during the downward movement of the loading frame 40 located at the upper side of the support structure 30, the four corners of the loading frame 40 can be dropped into the placing groove 61 until abutting against the lower end of the placing groove 61.
In this embodiment, through the setting of guide structure 60 and standing groove, can prescribe a limit to the downward motion process of loading frame 40, also can prescribe a limit to the position that loading frame 40 put down, reduced the possibility of position deviation between loading frame 40 puts down, reduced the possibility of the central deviation of weight and weighing pan 50 after putting down, reduced the possibility that the weight produced the unbalance loading error, increased accuracy and stability when comparator calibration.
Specifically, the guiding structure 60 can be disposed on the base 10 and integrally formed, or can be disposed separately from the base 10, and the distance adjusting function of the guiding structure 60 is realized; the guide structure 60 can extend upwards to the height of the support structure 30, and the lower end of the loading frame 40 can be in a flat state and directly abut against the placing groove 61 at the upper end of the guide structure 60, so that the loading frame 40 can be conveniently processed and installed.
According to another embodiment of the present invention, as shown in fig. 2 to 4, the present embodiment is different from the first embodiment in the specific structure of the centering assembly 20.
On the basis of the first embodiment, in the present embodiment, the centering assembly 20 includes a roller 21 and a sliding seat 22, the roller 21 is rotatably disposed on the base 10 along the axial direction thereof, and the roller 21 can be disposed on the upper side of the base 10; the gyro wheel 21 sets up to two sets ofly, and two sets of gyro wheel 21's axis is parallel, and two sets of gyro wheels 21 set up both ends about base 10 upside, and the axis of two sets of gyro wheels 21 all sets up along the horizontal direction.
The sliding seats 22 can be arranged at the lower side of the weighing plate 50, the sliding seats 22 comprise abutting surfaces abutting against the rollers 21, the abutting surfaces are obliquely arranged, the sliding seats 22 are arranged into two groups, and the abutting surfaces of the two groups of sliding seats 22 are opposite in oblique direction; when the contact surfaces of the two sets of sliding seats 22 are inclined in opposite directions, the component forces of the supporting forces received by the two sets of sliding seats 22 in the horizontal direction are the same, but the directions are opposite; the two sets of sliding seats 22 are supported by upward vertical components, and the sum of the two vertical components is equal to the gravity of the weighing pan 50, so that the sliding seats 22 can be disposed on the centering assembly 20.
In this embodiment, when the object to be measured is placed on the supporting structure 30, the supporting force received by the two sliding seats 22 changes, the weighing pan 50 is under the action of gravity, the sliding seats 22 are always abutted to the rollers 21, the change of the gravity center of the weighing pan 50 is realized, and the centering assembly 20 realizes the deflection of the weighing pan 50 until the supporting force received by the two groups of sliding seats 22 is balanced with the gravity of the object to be measured and the gravity of the weighing pan 50.
Specifically, the cross section of the sliding seat 22 may be triangular or trapezoidal, but the plane where the oblique side of the triangle is located and the plane where the oblique side of the trapezoid is located can be used as the abutting surfaces of the sliding seats 22, and the abutting surfaces of the two sliding seats 22 can abut against the roller 21 at the same time; the roller 21 can be chosen as a bearing.
The distance between the axes of the two groups of rollers 21 and the center of the weighing pan 50 is the same, so that the rollers 21 with the same size can be selected by the two groups of rollers 21, and when the weighing pan 50 is not provided with a to-be-measured piece, the weighing pan 50 can be in a horizontal state, the stability of the weighing pan 50 is improved, and the possibility of inclination of the weighing pan 50 is reduced.
Each group of sliding seats 22 is provided with a plurality of sliding seats, the number of each group of sliding seats 22 is the same as the number of the rollers 21, specifically, in this embodiment, each group of sliding seats 22 is provided with two sliding seats 22, and the two sliding seats 22 are provided at the front and rear ends of the base 10. By limiting the number of slide blocks 22 and rollers 21, the constraint between the centering assembly 20 and the weighing pan 50 is increased, the possibility of the weighing pan 50 wobbling on the centering assembly 20 is reduced, and the stability of the weighing pan 50 is increased.
According to the improvement of the above embodiment, in the present embodiment, the distance between the ends of the inclined surfaces of the two sets of sliding seats 22 close to the base 10 is smaller than the distance between the ends of the inclined surfaces of the two sets of sliding seats 22 far away from the base 10, that is, the outer normal directions of the inclined surfaces of the two sets of sliding seats 22 extend towards the outer lower end of the base 10; when the cross section of the slide holder 22 is triangular or trapezoidal, the contact surfaces of both the slide holders 22 can face outward.
When the user is installing weighing pan 50 on gyro wheel 21, because the interval between the lower extreme of two sets of sliding seat 22 is less than the interval between two sets of gyro wheels 21, the user can directly place two sets of sliding seat 22 between two sets of gyro wheels 21, and after the user loosened weighing pan 50, weighing pan 50 can be under the action of gravity, and two sets of sliding seat 22 butt are on two sets of gyro wheels 21, and the focus of weighing pan 50 can be located the centre of gravity position of centering subassembly 20.
By defining the shape of the sliding seat 22, the user can directly abut the two sliding seats 22 at the lower end of the weighing pan 50 on the two rollers 21, and the operation of the user is facilitated.
According to another embodiment of the present invention, as shown in fig. 2 to 4, a centering and weighing device is provided, which is different from the second embodiment in the addition of the abutting block 23.
On the basis of the second embodiment, in this embodiment, the centering assembly 20 further includes an abutting block 23, the abutting block 23 can be disposed on the base 10 and used for abutting against the sliding seat 22, when the sliding seat 22 abuts against the abutting block 23, the weighing pan 50 can be obliquely disposed on the centering assembly 20, when the to-be-measured object is not placed on the supporting structure 30, the weighing pan 50 can be in a horizontal state, and a certain distance is provided between the abutting block 23 and the sliding seat 22.
In the process that the centering assembly 20 controls the weighing pan 50 to incline, through the arrangement of the abutting block 23, the sliding seat 22 can abut against the abutting block 23, so that the possibility that the sliding seat 22 continues to move is reduced, the possibility that the weighing pan 50 is driven to move is further reduced, the possibility that the weighing pan 50 excessively deflects is reduced, and the reliability of the deflection process of the weighing pan 50 is improved; by setting the pitch, the tilting action of the weighing pan 50 can be achieved.
Preferably, when the sliding seat 22 abuts against the abutment block 23, the angle between the weighing pan 50 and the base 10 is between 1 ° and 3 °, preferably 1.5 °. When the sliding seat 22 abuts against the supporting structure, the sliding seat 22 is at the limit position, and the included angle between the weighing pan 50 and the base 10 is controlled, so that the possibility of sliding of the to-be-measured piece on the supporting structure 30 is reduced, and the stability of the to-be-measured piece on the supporting structure 30 is increased.
According to an embodiment of the present invention, as shown in fig. 1 to 5, a centering weighing method includes:
and S1, placing the piece to be tested in the loading frame.
And S2, moving the loading frame downwards along the vertical direction, and mounting the loading frame on the base.
And S3, analyzing whether the included angle between the weighing plate and the base is smaller than a preset included angle or not.
And S4, when the included angle between the weighing disc and the base is smaller than the preset included angle, the piece to be measured is weighed.
S5, when the included angle between the weighing plate and the base is larger than or equal to a preset included angle, moving the loading frame upwards along the vertical direction until the piece to be measured is separated from the supporting structure, re-executing the step, moving the loading frame downwards along the vertical direction, and installing the loading frame on the base.
When a user needs to weigh the piece to be measured, the piece to be measured is placed in the loading frame 40 taken down from the base 10, namely, the piece to be measured is placed on the loading table 41, the gravity center of the piece to be measured is controlled to be as close to the center of the loading frame 40 as possible, and the piece to be measured is placed completely.
The loading frame 40 is moved to the upper side of the support structure 30 and is placed downward on the base 10, and during the placing, since the upper side of the loading table 41 is lower than the upper side of the support structure 30, the dut can be simultaneously abutted on the loading table 41 and the support structure 30 when the upper side of the loading table 41 is flush with the upper side of the support structure 30.
When the loading frame 40 continues to move downwards until the loading frame 40 is mounted on the base 10, the to-be-measured object is separated from the loading table 41, the support structure 30 supports the to-be-measured object, and when the center of gravity of the to-be-measured object is not at the same position as the center of gravity of the weighing pan 50, since the center of gravity of the weighing pan 50 is located at the center of the centering assembly 20, that is, when the center of gravity of the to-be-measured object is not at the center of the centering assembly 20, the center of gravity of the combination of the to-be-measured object and the weighing pan 50 is not at the center of the centering assembly 20, the centering assembly 20 can adjust the included angle between the weighing pan 50 and the base 10, and thus the center of gravity of the combination of the to-be-measured object and the weighing pan 50, until the center of the combination of the to-be-measured object and the weighing pan 50 is located at the center of the centering assembly 20, that is, that the weighing pan 50 is adjusted to be inclined.
After the above state is stable, the loading frame 40 is moved vertically upwards, the weighing pan 50 is restored to the horizontal state under the action of the centering assembly 20, that is, the gravity center of the weighing pan 50 is located at the center of the centering assembly 20, in the current state, the position of the to-be-measured object is changed once, the distance between the gravity center of the to-be-measured object and the center of the centering assembly 20 is reduced, and the above steps are executed again.
When a user places the loading frame 40 with the piece to be measured on the base 10, the user can determine whether the gravity center of the piece to be measured meets the requirement and whether the unbalance loading error caused under the current state can be accepted by observing the included angle between the weighing pan 50 and the base 10, namely judging whether the included angle between the weighing pan 50 and the base 10 is smaller than the preset included angle, namely the inclination degree of the weighing pan 50, and the basis for judging whether the piece to be measured needs to be weighed again. In this embodiment, the preset included angle may be selected to be 0.2 °, and may be changed according to the needs of the user.
In this embodiment, through the limitation of the height between the loading platform 41 and the supporting structure 30 and the loading frame 40 detachably connected, in the process that the loading frame 40 moves in the direction close to the base 10, the to-be-tested piece can move from the loading platform 41 to the supporting structure 30, so that the to-be-tested piece is separated from the loading platform 41; through the setting of centering subassembly 20, realized the regulation of a piece focus position that awaits measuring to through the loading frame 40 of motion, when moving to the direction of keeping away from base 10 once more, the focus position of the piece that awaits measuring can change, realized the centering of the piece that awaits measuring and weighed, reduced the piece that awaits measuring and produced the possibility of unbalance loading error, increased the degree of accuracy and the stability that the piece that awaits measuring weighed.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (2)

1. A centering weighing device, comprising:
the device comprises a base, wherein a centering assembly is arranged on the base, a weighing disc for weighing a piece to be measured is arranged on the centering assembly, and the centering assembly is used for adjusting an included angle between the weighing disc and the base;
the supporting structure is arranged on the weighing disc, a supporting gap is arranged on the supporting structure, and the width of the supporting gap is smaller than that of the piece to be measured;
the loading frame is detachably connected to the base and comprises a loading platform for supporting the piece to be tested;
when the loading frame is arranged on the base, the loading platform is arranged in the supporting gap, and the distance between one side of the loading platform, which is far away from the base, and the base is smaller than the distance between one side of the supporting structure, which is far away from the base, and the base;
the centering assembly comprises a roller and a sliding seat;
the rollers are rotationally arranged on the base along the axis direction of the rollers, the rollers are arranged into two groups, and the axes of the two groups of rollers are parallel;
the sliding seats are arranged on the weighing disc and comprise abutting surfaces abutting against the rollers, the abutting surfaces are obliquely arranged, the sliding seats are arranged into two groups, and the inclining directions of the abutting surfaces of the two groups of sliding seats are opposite;
the distance between the axes of the two groups of rollers and the center of the weighing pan is the same;
the number of the sliding seats in each group is the same as that of the rollers in each group;
the distance between the abutting surfaces of the two groups of sliding seats and one end close to the base is smaller than the distance between the abutting surfaces of the two groups of sliding seats and one end far away from the base;
the centering assembly further comprises:
the abutting block is arranged on the base and used for abutting the sliding seat;
when the piece to be tested is not placed on the supporting structure, a space is formed between the abutting block and the sliding seat;
when the sliding seat is abutted against the abutting block, an included angle between the weighing disc and the base is 1-3 degrees;
when the weighing pan is inclined, the distance between the side of the loading platform far away from the base and the base is smaller than the minimum distance between the side of the supporting structure far away from the base and the base;
when the loading frame is arranged on the base, a gap is formed between the loading platform and the supporting structure.
2. A weighing method applied to a centering weighing device according to claim 1, characterized by comprising:
placing the piece to be tested in a loading frame;
moving the loading frame downwards along the vertical direction, and installing the loading frame on a base;
analyzing whether an included angle between the weighing plate and the base is smaller than a preset included angle or not;
when the included angle between the weighing disc and the base is smaller than a preset included angle, the weighing of the piece to be measured is finished;
and when the included angle between the weighing plate and the base is larger than or equal to a preset included angle, the loading frame is moved upwards along the vertical direction until the piece to be measured is separated from the supporting structure, the step is executed again, the loading frame is moved downwards along the vertical direction, and the loading frame is installed on the base.
CN201811341600.9A 2018-11-12 2018-11-12 Centering weighing device and weighing method Active CN109470349B (en)

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