CN113959550A - Unequal-arm balance loading unit, weighbridge calibrating device and weighbridge calibrating method - Google Patents
Unequal-arm balance loading unit, weighbridge calibrating device and weighbridge calibrating method Download PDFInfo
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- CN113959550A CN113959550A CN202111145106.7A CN202111145106A CN113959550A CN 113959550 A CN113959550 A CN 113959550A CN 202111145106 A CN202111145106 A CN 202111145106A CN 113959550 A CN113959550 A CN 113959550A
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- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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Abstract
The invention provides an unequal arm balance loading unit, a weighbridge calibrating device and a weighbridge calibrating method. The unequal arm balance loading unit comprises a lever, a weight mechanism, a loading support mechanism, a leveling mechanism, a levelness detection mechanism and a first lifting mechanism for adjusting the level of the lever. The weight with determined mass is applied to the long arm end of the lever, the pull-balance mechanism applies certain pulling force to the short arm end of the lever to keep balance, and the loading support mechanism serving as a lever fulcrum transmits the mass of the weight at the long arm end and the equivalent mass of the pulling force applied by the pull-balance mechanism at the short arm end to the floor balance table board. By means of the amplification effect of the lever, the calibration and detection of the ground scale can be completed only by adopting the loading unit with the mass about one tenth or even one tenth of that of the traditional weight calibration mode. The device for calibrating the weighbridge has the advantages of small occupied space, convenience in transportation and storage, capability of greatly improving the calibration efficiency of the weighbridge and reduction in the calibration cost.
Description
Technical Field
The invention relates to the technical field of weighbridge verification, in particular to an unequal arm balance loading unit, a weighbridge verification device and a weighbridge verification method.
Background
The weighbridge is a weighing machine which weighs the automobile and the loaded goods together. In order to ensure the measurement accuracy of the weighbridge, the weighbridge needs to be periodically verified. The maximum range of a general weighbridge is dozens of tons to hundreds of tons, the calibration of the weighbridge is carried out by adopting standard weights for comparison calibration at present, for the weighbridge of hundreds of tons, a standard weight block with the total mass of hundreds of tons needs to be configured according to the traditional calibration method, and the calibration cost is high because the required standard weight block has large mass and large occupied space and the standard weight block is very inconvenient to store and transport.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an unequal arm balance loading unit, a balance calibrating device and a balance calibrating method.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: an unequal arm balance loading unit comprising:
a lever divided into a long arm end and a short arm end by a fulcrum;
the weight mechanism is used for loading weights of the weight mechanism at the long arm end of the lever;
the upper end of the loading support mechanism is supported at the fulcrum position of the lever, and the lower end of the loading support mechanism is pressed on the platform surface of the ground scale to be detected;
the upper end of the pull balance mechanism acts on the short arm end of the lever, and the bottom of the pull balance mechanism is fixedly connected to a base of the ground scale or a foundation outside the ground scale;
a levelness detection mechanism for detecting the levelness of the lever;
and the first lifting mechanism is arranged on the loading supporting mechanism or the pulling balance mechanism and is used for adjusting the levelness of the lever.
By adopting the technical scheme of the invention, weights with determined mass are applied to the long arm end of the lever, the pull-balance mechanism applies certain pulling force to the short arm end of the lever to keep balance, and the loading support mechanism serving as a lever fulcrum transmits the mass of the weights at the long arm end and the equivalent mass of the pulling force applied by the pull-balance mechanism at the short arm end to the platform surface of the earth balance; the lever is adjusted to be in a horizontal state through the first lifting mechanism and the levelness detection mechanism, and the equivalent mass of the short arm end is the mass of the weight at the long arm end multiplied by the lever, so that the mass value loaded on the platform surface of the ground scale is accurately obtained. The invention can finish the calibration and detection of the weighbridge by only adopting the loading unit with the mass about one tenth or even one tenth of that of the traditional weight verification mode under the amplification action of the lever during verification.
Further, draw balance mechanism including drawing balancing stand, last arm-tie and first line contact mechanism, draw balancing stand fixed connection on the ground balance base or on the outer basic ground of ground balance, first elevating system installs draw between balancing stand and the last arm-tie, go up the arm-tie and pass through first line contact mechanism with the short arm end of lever is connected, first line contact mechanism's contact line become horizontal state and with lever length direction is perpendicular.
Adopt above-mentioned preferred scheme, set up first elevating system on being fixed in the balanced frame that draws of firm base member, promoted structural stability.
The lifting mechanism comprises a pull plate, a first lifting mechanism and a second lifting mechanism, wherein the pull plate is arranged on the pull balance frame, the first lifting mechanism is arranged on the pull plate, the second lifting mechanism is arranged on the pull balance frame, the second lifting mechanism is arranged on the pull plate, the second lifting mechanism is arranged on the pull balance frame, the pull plate, the first lifting mechanism is arranged on the pull plate, and the telescopic shaft of the first lifting mechanism is connected with the pin shaft in a horizontal state, and the length direction, and the shaft axis of the first lifting mechanism is connected with the spherical joint mechanism, and is connected with the upper pull plate, and is connected with the spherical joint mechanism, and the shaft axis of the shaft, and is connected with the shaft, and is further, and is connected with the shaft, and is arranged in the axis of the shaft, and is connected with the shaft, and is in the axis of the shaft, and the axis of the shaft, and is in the axis of the horizontal state, and the shaft, and is in the shaft, and is connected with the axis, and is connected with the horizontal state, and is connected with the shaft, and is connected with the lever length direction, and is connected with the shaft, and is connected with the lever, and is connected with the shaft, and the lever, and the shaft, and is in.
By adopting the preferable scheme, the tension balance frame is ensured to generate the tension force which is vertical to the lever.
Further, the first line contact mechanism comprises a first blade seat, a first main blade, a first reinforcing block, a first blade seat and a first main blade bearing, wherein the middle section of the first blade seat is installed in the through hole of the lever, the two ends of the lever, which are exposed out of the first blade seat, are respectively provided with the first main blade, the blade part of the first main blade is upward, the first reinforcing block is fixed on the two side surfaces of the lever, the first reinforcing block abuts against the lower part of the first blade seat, the first blade seat is fixedly connected with the upper pull plate, the first main blade bearing is installed on the lower surface of the first blade seat, and the first main blade bearing is in linear contact with the first main blade bearing.
Adopt above-mentioned preferred scheme, reduce the area of contact who draws balanced mechanism and lever, realize the horizontal linear contact of perpendicular to lever for when lever horizontal balance, draw balanced mechanism to the effort of lever along vertical direction, improve the degree of accuracy of acting on the equal-effect quality of ground balance.
Further, the loading support mechanism comprises a lower loading seat, a guide pillar, an upper loading seat and a second line contact mechanism, wherein a roller is installed below the lower loading seat, the roller is pressed on the table top of the ground scale to be detected, the guide pillar is vertically connected between the lower loading seat and the upper loading seat, and the upper loading seat is connected with the lever through the second line contact mechanism.
By adopting the preferable scheme, the loading supporting mechanism is in contact with the platform surface of the ground scale by adopting the roller mechanism, the loading supporting mechanism and the platform surface of the ground scale can freely roll in the horizontal direction, the horizontal plane freedom degree of the ground scale is not changed, and the reading accuracy is improved.
Furthermore, a guide sleeve is arranged on the tension balance frame and is sleeved on the guide pillar of the loading support mechanism.
By adopting the preferable scheme, the position between the pull balancing mechanism and the loading supporting mechanism can be kept stable, and the supporting force and the pull balancing force are kept vertically parallel.
Furthermore, the guide sleeve is of a two-half structure, and the guide sleeve opening and closing control device further comprises a driving mechanism for controlling the guide sleeve to open and close.
By adopting the preferred scheme, in the lever leveling process, the guide sleeve is matched with the guide pillar, so that the position of the loading support mechanism is ensured to be kept stable; after the horizontal adjustment is completed, the guide sleeve and the guide pillar are released, so that the mass of the weight and the equivalent mass of the leveling balance are completely released on the platform surface of the floor scale, and the accuracy of loading mass is improved.
Further, the second line contact mechanism comprises a second blade seat, a second main blade, a second reinforcing block, a second blade seat and a second main blade, the middle section of the second blade seat is installed in the through hole of the lever, the two ends of the lever, which are exposed out of the second blade seat, are respectively provided with the second main blade, the blade part of the second main blade faces downwards, the second reinforcing block is fixed on the two side surfaces of the lever, abuts against the upper part of the second blade seat, the second blade seat is fixedly installed with the upper loading seat, the second main blade is installed on the upper surface of the second blade seat, and the second main blade is in linear contact with the second main blade.
By adopting the preferable scheme, the contact area between the loading support mechanism and the lever is reduced, the horizontal linear contact perpendicular to the lever is realized, and the acting force of the loading support mechanism on the lever is along the vertical direction when the lever is horizontally balanced.
Further, the weight mechanism includes that weight dolly, weight loading mechanism, weight concatenate combination, weight stores pylon and third line contact mechanism, the weight dolly includes bottom plate, roof and installs stand between bottom plate and the roof, weight loading mechanism is including removing layer board and second elevating system, the drive of second elevating system remove the layer board edge it moves to go up and down to remove the stand, the weight stores pylon warp third line contact mechanism hang in the long arm end of lever, the weight concatenates the combination and includes a plurality of weights that concatenate each other, hangs the nail through the weight between the adjacent weight and establishes ties, the weight concatenates the combination upper end hang in on the weight stores pylon, it sets up the below that concatenates the combination at the weight to remove the layer board.
By adopting the preferable scheme, the automatic stable loading of the weight is conveniently realized.
Further, the weight dolly is placed on waiting to examine the ground scale mesa of deciding, perhaps the weight dolly sets up on transversely making somebody a mere figurehead the support frame of ground scale mesa top.
Further, the third line contact mechanism includes a third blade seat, a third main blade, a third blade seat, and a third main blade, the third blade seat is mounted on the long arm end of the lever, the third main blade is mounted on the upper surface of the third blade seat, the blade of the third main blade faces upward, the third main blade is mounted on the lower surface of the third blade seat, and the third main blade is in linear contact with the third main blade.
Adopt above-mentioned preferred scheme, reduce the area of contact of weight stores pylon and lever, realize the horizontal linear contact of perpendicular to lever for when lever horizontal balance, the effort of weight to the lever is along vertical downward direction.
Furthermore, a lever locking mechanism is arranged on a top plate of the weight trolley, a locking block is installed at the long arm end of the lever, the lever locking mechanism comprises a locking structure frame, a driving mechanism, a locking screw rod, a guide rod, an upper moving plate, a lower moving plate, an upper pressing head and a lower pressing head, the guide rod is vertically installed on the locking structure frame, the upper half section and the lower half section of the locking screw rod are provided with two sections of threads with opposite spiral directions, the upper moving plate is sleeved on the guide rod and installed on the upper half section of the locking screw rod through a thread sleeve, the lower moving plate is sleeved on the guide rod and installed on the lower half section of the locking screw rod through a thread sleeve, the upper pressing head is installed on the upper pressing head, the lower pressing head is installed on the lower moving plate, the moving plate drives the locking screw rod to rotate, and further drives the upper pressing head and the lower pressing head to move towards or away from each other, the locking block is located at the middle position between the upper pressure head and the lower pressure head.
By adopting the preferable scheme, in the weight loading process, the lever position is temporarily locked through the lever locking mechanism, and the locking is released after the weight loading is finished, so that the lever levelness can be more quickly adjusted.
The ground scale calibrating device comprises at least one unequal arm scale loading unit and a control unit, wherein the control unit is in signal connection with each unequal arm scale loading unit.
By adopting the technical scheme of the invention, the number of the loading units which need to be deployed at the same time is selected according to the total loading equivalent mass of the loading unit of the unequal arm balance and the maximum tonnage of the weighbridge to be identified. The mass of the whole weighbridge calibrating device is only equivalent to one tenth or even one tenth of that of the traditional weight calibrating mode, full-range multipoint calibration detection of the weighbridge can be realized by means of the amplification effect of the lever, and unbalance loading tests, weighbridge strength tests and the like can be realized.
A method for calibrating a ground scale adopts k unequal arm balance loading units, wherein k is more than or equal to 1, and in the unequal arm balance loading units, the length of the arm of force at the long arm end of a lever is taken as L1The length of the force arm at the end of the short arm is L2Mass of the lever is m01Mass of the loading support mechanism is m02The magnification factor n is L1/L2The method comprises the following steps:
step 1, respectively installing various unequal-arm balance loading units, placing a loading support mechanism on a platform surface of a to-be-detected ground balance, installing a balance pulling mechanism on a ground balance base or a foundation outside the ground balance, installing a first lifting mechanism on the balance pulling mechanism, enabling the balance pulling mechanism to be in a non-force-application state on a lever, installing the lever, adjusting the lever to be in a horizontal balance state, and comparing a reading Z of the ground balance0And (m)01+m02) A difference in x k;
step 2, the total hanging mass at the long arm end of the lever of the k unequal arm balance loading units is m10The weight, draw the balance mechanism to exert pulling force to the short arm end of the lever, adjust through the first lifting mechanism, adjust the lever to the horizontal balance state, compare the reading Z that the earth balance increases1And m10Difference of (n + 1).
By adopting the technical scheme, the loading of the large mass of the earth scale by the small mass weight is realized by means of the amplification effect of the unequal arm balance lever.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic diagram showing the structure of an unequal arm balance loading unit according to the present invention;
FIG. 3 is a schematic view of an unequal arm balance;
FIG. 4 is a partial block diagram of the load support mechanism and the pull balance mechanism;
fig. 5 is a partial structural view at the weight mechanism;
FIG. 6 is a schematic structural view of the lever capture mechanism;
FIG. 7 is a partial block diagram at the first wire contact mechanism;
FIG. 8 is a partial block diagram at the second wire contact mechanism;
fig. 9 is a partial structural view at the third wire contact mechanism;
fig. 10 is a schematic structural view of another embodiment of the present invention.
Names of corresponding parts represented by numerals and letters in the drawings:
100-a loading unit; 110-a lever; 1101-a long arm end; 1102-short arm end; 1103-a locking block; 120-weight mechanism; 121-weight trolley; 1211-base plate; 1212-a top plate; 1213-upright; 122-weight loading mechanism; 1221-moving the pallet; 1222-a second lifting mechanism; 123-weight series connection combination; 1231-weight; 124-weight hanging rack; 125-third wire contact mechanism; 1251-a third blade mount; 1252-third major cutting edge; 1253-third tool carriage; 1254-third main blade; 130-a loading support mechanism; 131-a lower loading seat; 132-guide pillars; 133-loading a seat; 134-a second wire contact mechanism; 1341-a second blade mount; 1342-a second main cutting edge; 1343-a second stiffener; 1344-second knife rest; 1345-second main carriage; 140-a leveling mechanism; 141-a balance frame; 142-a pull-up plate; 143-a first line contact mechanism; 1431 — a first blade mount; 1432 — first major cutting edge; 1433 — a first stiffener; 1434-a first tool holder; 1435 — first main bearing; 144-a rotating shaft seat; 145-pin shaft; 146-a spherical joint mechanism; 147-a guide sleeve; 150-a first lifting mechanism; 160-lever locking mechanism; 1601-a locking structure frame; 1602 — a drive mechanism; 1603-locking screw rod; 1604-guide rod; 1605-moving the board upwards; 1606-lower moving plate; 1607-upper pressure head; 1608-lower ram; 201-platform scale; 202-ground balance base.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, in one embodiment of the present invention, an unequal arm balance loading unit 100 includes:
a lever 110 divided into a long arm end 1101 and a short arm end 1102 by a fulcrum;
a weight mechanism 120, wherein the weight of the weight mechanism is loaded at the long arm end 1101 of the lever;
the upper end of the loading support mechanism 130 is supported at the fulcrum position of the lever 110, and the lower end of the loading support mechanism is pressed on the platform surface 201 of the ground scale to be detected;
the upper end of the pull balance mechanism 140 acts on the short arm end 1102 of the lever, and the bottom of the pull balance mechanism is fixedly connected to the base 202 of the ground scale or a foundation outside the ground scale;
a levelness detection mechanism for detecting the levelness of the lever 110;
and a first elevating mechanism 150 installed on the pull balance mechanism 140, the first elevating mechanism 150 being used to adjust the levelness of the lever 110.
In figure 3 a schematic view of the principle of an unequal arm balance used in the invention is shown,
n＝L1/L2＝F2/F1＝m2g/m1g,
wherein n is the amplification factor of the lever, L1The length of the arm at the end of the long arm, L2The length of the force arm at the short arm end;
F1is the mass m of the weight1Force generated, F1＝m1g；
F2For the forces generated by the balance mechanism, F2＝m2g，m2Is F2Provided equivalent mass, m2＝n*m1；
The supporting force F generated by the fulcrum to the lever is equal to F1+F2F is equal to the downward acting force generated by the lever on the fulcrum, and the gravity acceleration g is completely the same at the same place on the earth, namely the equivalent mass m applied by the lever on the fulcrum is equal to m1+m2＝(n+1)*m1。
The beneficial effect of adopting above-mentioned technical scheme is: applying weights with determined mass at the long arm end of the lever, applying certain tensile force to the short arm end of the lever by the leveling mechanism to keep balance, and transmitting the mass of the weights at the long arm end and the equivalent mass of the tensile force applied by the leveling mechanism at the short arm end to the floor balance table board by the loading support mechanism serving as a lever fulcrum; the lever is adjusted to be in a horizontal state through the first lifting mechanism and the levelness detection mechanism, and the equivalent mass of the short arm end is the mass of the weight at the long arm end multiplied by the lever, so that the mass value loaded on the platform surface of the ground scale is accurately obtained. The invention can finish the calibration and detection of the weighbridge by only adopting the loading unit with the mass about one tenth or even one tenth of that of the traditional weight verification mode under the amplification action of the lever during verification.
In other embodiments of the present invention, the levelness detection mechanism uses a high-precision displacement sensor or an angle sensor, the first lifting mechanism 150 uses a worm gear transmission mechanism and a servo motor as a drive, and the control unit collects levelness signals detected by the levelness detection mechanism in real time and controls the lever position to keep horizontal in a closed-loop manner through the adjustment of the servo motor.
In other embodiments of the present invention, as shown in fig. 4, the leveling mechanism 140 includes a leveling frame 141, an upper pulling plate 142 and a first line contacting mechanism 143, the leveling frame 141 is fixedly connected to the foundation of the ground balance or the foundation outside the ground balance, the first lifting mechanism 150 is installed between the leveling frame 141 and the upper pulling plate 142, the upper pulling plate 142 is connected to the short arm end 1102 of the lever through the first line contacting mechanism 143, and the contact line of the first line contacting mechanism 143 is horizontal and perpendicular to the length direction of the lever 110. Wherein, draw the power that produces when the connection of balance frame and the body base of weighbridge or weighbridge basis will stabilize and can bear the loading, its connected mode has three kinds: firstly, bolts are preassembled on a steel structure beam of a base of the weighbridge scale body, and a lower base of a tension balancing stand is firmly connected with the base of the scale body through bolts and nuts; secondly, arranging a plurality of fixing devices on the foundation of the concrete foundation of the weighbridge, for example, arranging stainless steel chemical bolts in the concrete, wherein the stainless steel chemical bolts are parallel to the plane of the concrete, each stainless steel chemical bolt is provided with a threaded hole, and the leveling device is fixed by installing a bolt through the threaded hole; thirdly, the flat steel plate is fixed on a steel cross beam of the base of the weighbridge or a concrete foundation, and then the base of the leveling mechanism is fixed in an adsorption mode through the magnetic force of the powerful permanent magnet. The beneficial effect of adopting above-mentioned technical scheme is: with first elevating system setting on being fixed in the balanced frame that draws of firm base member, promoted structural stability.
As shown in fig. 4, in another embodiment of the present invention, the present invention further includes a rotating shaft base 144, the rotating shaft base 144 is installed on the tension balance frame 141, the rotating shaft base 144 is connected to the base of the first elevating mechanism 150 through a pin 145, the pin 145 is horizontal and vertical to the lever length direction, and the telescopic shaft of the first elevating mechanism 150 is connected to the upper tension plate 142 through a spherical joint mechanism 146. The beneficial effect of adopting above-mentioned technical scheme is: ensuring that the tension balancing stand generates a tension force which is vertical to the lever.
As shown in fig. 4, in other embodiments of the present invention, the loading supporter 130 includes a lower loading base 131, a guide post 132, an upper loading base 133, and a second wire contact mechanism 134, a roller is installed below the lower loading base 131 and pressed against a floor of a ground balance to be calibrated, the guide post 132 is vertically connected between the lower loading base 131 and the upper loading base 133, and the upper loading base 133 is connected to the lever 110 via the second wire contact mechanism 134. The beneficial effect of adopting above-mentioned technical scheme is: the loading supporting mechanism is in contact with the platform surface of the weighbridge by adopting a roller mechanism, the loading supporting mechanism and the platform surface of the weighbridge can freely roll in the horizontal direction, the degree of freedom of the horizontal plane of the weighbridge is not changed, and the reading accuracy is improved.
In other embodiments of the present invention, as shown in fig. 4, a guide sleeve 147 is disposed on the tension balance frame 141, and the guide sleeve 147 is sleeved on the guide post 132 of the loading support mechanism. The beneficial effect of adopting above-mentioned technical scheme is: the position between the pull balance mechanism and the loading support mechanism can be kept stable, and the support force and the pull balance force are kept vertically parallel.
In other embodiments of the present invention, the guide sleeve is a two-half structure, and further comprises a driving mechanism for controlling the opening and closing of the guide sleeve. The beneficial effect of adopting above-mentioned technical scheme is: in the lever leveling process, the guide sleeve is matched with the guide pillar 132 to ensure that the position of the loading support mechanism is kept stable; after the horizontal adjustment is finished, the guide sleeve and the guide pillar 132 are released, so that the mass of the weight and the equivalent mass of the leveling balance are completely released on the platform surface of the floor scale, and the accuracy of loading mass is improved.
As shown in fig. 5, in another embodiment of the present invention, the weight mechanism 120 includes a weight carriage 121, a weight loading mechanism 122, a weight serial combination 123, a weight hanger 124 and a third wire contact mechanism 125, the weight carriage 121 includes a bottom plate 1211, a top plate 1212 and a column 1213 installed between the bottom plate 1211 and the top plate 1212, the weight loading mechanism 122 includes a movable support plate 1221 and a second lifting mechanism 1222, the second lifting mechanism 1222 drives the movable support plate 1221 to move up and down along the column 1213, the weight hanger 124 is suspended from the long arm end 1101 of the lever through the third wire contact mechanism 125, the weight serial combination 123 includes a plurality of weights 1231 connected in series, adjacent weights are connected in series through weight hanging pins, the upper end of the weight serial combination 123 is hung below the weight hanger 124, and the movable support plate 1221 is disposed below the weight serial combination 123 for supporting in sequence when the weights are lifted. The beneficial effect of adopting above-mentioned technical scheme is: the automatic stable loading of the weight is conveniently realized.
In other embodiments of the invention, the weight trolley is arranged on a support frame transversely overhead above the platform surface of the weighbridge, and two ends of the support frame are respectively arranged on the foundation frame bodies on two sides of the weighbridge. Thus, after a certain weight is loaded at the long arm end of the lever, the mass increment obtained on the platform surface of the ground balance is the sum of the mass of the weight and the equivalent mass generated at the short arm end of the lever by the leveling mechanism, namely the mass increment is the mass of the loaded weight (the amplification ratio of the lever is plus 1).
In other embodiments of the invention, the weight carriage 121 is placed on the platform of the weighbridge to be calibrated so that the total mass of the weight mechanism is added to the initial total mass loaded at the initial calibration of the weighbridge. And every time after a certain weight is loaded at the long arm end of the lever, the mass of the weight on the weight trolley is correspondingly reduced, but all weights are always finally loaded on the platform surface of the weighbridge, and the mass increment obtained on the platform surface of the weighbridge only has the equivalent mass generated at the short arm end of the lever by the pull balance mechanism, namely the mass increment only has the weight loading mass and the lever amplification ratio.
In other embodiments of the present invention, as shown in fig. 7-9, in order to ensure that the weight force of the weight on the lever, the pulling force of the pull-balance mechanism on the lever, and the supporting force of the loading support mechanism on the lever are all along the vertical direction, the accuracy of the final loading on the floor balance table top mass is prevented from being influenced by the force components in other directions. The first line contact mechanism 143 includes a first blade seat 1431, a first main blade 1432, a first reinforcing block 1433, a first blade seat 1434, and a first main blade 1435, wherein a middle section of the first blade seat 1431 is installed in a through hole of the lever 110, the first main blade 1432 is installed at each end of the first blade seat 1431 exposed out of the lever, a blade of the first main blade 1432 faces upward, the first reinforcing block 1433 is fixed at both side surfaces of the lever, the first reinforcing block 1433 abuts against a lower side of the first blade seat 1431, the first blade seat 1434 is fixedly connected with the upper pulling plate 142, the first main blade 1435 is installed at a lower surface of the first blade seat 1434, and the first main blade 1435 is in linear contact with the first main blade 1432. The second line contact mechanism 134 includes a second blade seat 1341, a second main blade 1342, a second reinforcing block 1343, a second blade seat 1344, and a second main blade 1345, wherein the middle section of the second blade seat 1341 is installed in the through hole of the lever 110, the second main blade 1342 is installed at each end of the second blade seat 1341 exposed out of the lever, the blade of the second main blade 1342 faces downward, the second reinforcing block 1343 is fixed at both side surfaces of the lever, the second reinforcing block 1343 abuts against the upper side of the second blade seat 1341, the second blade seat 1344 is fixedly installed with the upper loading seat 133, the second main blade seat 1345 is installed on the upper surface of the second blade seat 1344, and the second main blade seat 1345 is in linear contact with the second main blade 1342. The third line contact mechanism 125 includes a third blade seat 1251, a third main blade 1252, a third blade seat 1253, and a third blade seat 1254, the third blade seat 1251 is mounted on the lever arm end 1101, the third main blade 1252 is mounted on the upper surface of the third blade seat 1251, the blade portion of the third main blade 1252 faces upward, the third blade seat 1254 is mounted on the lower surface of the third blade seat 1253, and the third blade seat 1254 is in linear contact with the third main blade 1252. As is apparent from the illustration, the first 1432, second 1342 and third 1252 main cutting edges have in cross-section a small angled V-shaped tip angle and the first 1435, second 1345 and third 1254 main cutting edges have a large angled V-shaped groove, so that the main cutting edges have a rocking freedom within the main cutting edge. Particularly, the first main blade 1432, the second main blade 1342 and the third main blade 1252 are all fixedly installed on the lever 110, so as to ensure that the force action point and the fulcrum position are kept stable, the length of the long force arm and the length of the short force arm are configured conveniently and accurately, so as to accurately calculate the equivalent mass loaded on the platform surface of the earth scale, and the loading accuracy of the loading unit is better than 0.01%.
As shown in fig. 6, in other embodiments of the present invention, a lever locking mechanism 160 is disposed on a top plate of the weight carriage 121, a locking block 1103 is mounted at a long arm end of the lever, the lever locking mechanism 160 includes a locking structure frame 1601, a driving mechanism 1602, a locking screw 1603, a guide rod 1604, an upper moving plate 1605, a lower moving plate 1606, an upper pressing head 1607 and a lower pressing head 1608, the guide rod 1604 is vertically mounted on the locking structure frame 1601, an upper half section and a lower half section of the locking screw 1603 have two threads with opposite spiral directions, the upper moving plate 1605 is sleeved on the guide rod 1604 and is mounted on the upper half section of the locking screw 1603 via a threaded sleeve, the lower moving plate 1606 is sleeved on the guide rod 1604 and is mounted on the lower half section of the locking screw 1603 via a threaded sleeve, the upper pressing head 1607 is mounted on the upper moving plate 1605, the lower pressing head 1608 is mounted on the lower moving plate 1606, the driving mechanism drives the locking screw 1603 to rotate, and further drives the upper pressing head 1607 and the lower pressing head 1608 to move towards or back to move, the locking block 1103 is located at an intermediate position between the upper ram 1607 and the lower ram 1608. The beneficial effect of adopting above-mentioned technical scheme is: in the weight loading process, the lever position is locked temporarily through the lever locking mechanism, and the locking is released after the weight loading is finished, so that the lever levelness can be adjusted more quickly.
In another embodiment of the present invention, as shown in fig. 10, a weighbridge calibration device includes a plurality of unequal arm balance loading units 100, and a control unit in signal connection with each unequal arm balance loading unit 100. And selecting the number of loading units required to be deployed simultaneously according to the total loading equivalent mass of the loading unit of the unequal arm balance and the maximum tonnage of the weighbridge to be identified. For example, one loading unit can be loaded with an equivalent mass of 10 tons, and 2, 5, 8, 10 and 20 loading units can be deployed simultaneously as required to test the truck scales of 20 tons, 50 tons, 80 tons, 100 tons and 200 tons. For the loading units with the lever amplification ratio of 10, the self mass of each loading unit is only about 1 ton, which is equivalent to 1/10 capable of loading equivalent mass of 10 tons, so that the mass of the whole weighbridge calibrating device is only one tenth of that of the traditional weight calibrating mode, the full-range multipoint calibration detection of the weighbridge can be realized, and an unbalance loading test, a weighbridge strength test and the like can be realized.
A method for calibrating ground balance features that k unequal arm balance loading units are usedThe middle k is more than or equal to 1, and the length of the arm of force at the long arm end of the lever is L in the unequal arm balance loading unit1The length of the force arm at the end of the short arm is L2Mass of the lever is m01Mass of the loading support mechanism is m02The magnification factor n is L1/L2The method comprises the following steps:
step 1, respectively installing various unequal-arm balance loading units, placing a loading support mechanism on a platform surface of a to-be-detected ground balance, installing a balance pulling mechanism on a ground balance base or a foundation outside the ground balance, installing a first lifting mechanism on the balance pulling mechanism, enabling the balance pulling mechanism to be in a non-force-application state on a lever, installing the lever, adjusting the lever to be in a horizontal balance state, and comparing a reading Z of the ground balance0And (m)01+m02) A difference in x k;
step 2, the total hanging mass at the long arm end of the lever of the k unequal arm balance loading units is m10The weight, draw the balance mechanism to exert pulling force to the short arm end of the lever, adjust through the first lifting mechanism, adjust the lever to the horizontal balance state, compare the reading Z that the earth balance increases1And m10Difference of (n + 1).
By adopting the technical scheme, the loading of the large mass of the earth scale by the small mass weight is realized by means of the amplification effect of the unequal arm balance lever.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (11)
1. An unequal arm balance loading unit comprising:
a lever divided into a long arm end and a short arm end by a fulcrum;
the weight mechanism is used for loading weights of the weight mechanism at the long arm end of the lever;
the upper end of the loading support mechanism is supported at the fulcrum position of the lever, and the lower end of the loading support mechanism is pressed on the platform surface of the ground scale to be detected;
the upper end of the pull balance mechanism acts on the short arm end of the lever, and the bottom of the pull balance mechanism is fixedly connected to a base of the ground scale or a foundation outside the ground scale;
a levelness detection mechanism for detecting the levelness of the lever;
and the first lifting mechanism is arranged on the loading supporting mechanism or the pulling balance mechanism and is used for adjusting the levelness of the lever.
2. The unequal arm balance loading unit according to claim 1, wherein the pull balance mechanism comprises a pull balance frame, an upper pull plate and a first line contact mechanism, the pull balance frame is fixedly connected to a base of the ground balance or a foundation outside the ground balance, the first lifting mechanism is installed between the pull balance frame and the upper pull plate, the upper pull plate is connected with the short arm end of the lever through the first line contact mechanism, and the contact line of the first line contact mechanism is in a horizontal state and is perpendicular to the length direction of the lever.
3. The unequal arm balance loading unit according to claim 2, further comprising a rotating shaft seat, wherein the rotating shaft seat is mounted on the tension balancing stand, the rotating shaft seat is connected with the base of the first lifting mechanism through a pin shaft, the axis direction of the pin shaft is horizontal and vertical to the length direction of the lever, and the telescopic shaft of the first lifting mechanism is connected with the upper tension plate through a spherical joint mechanism.
4. The unequal arm balance loading unit according to claim 2, wherein the first line contact mechanism comprises a first blade holder, a first main blade, a first reinforcing block, a first blade holder and a first main blade bearing, the middle section of the first blade holder is installed in the through hole of the lever, the first main blade is installed at each of two ends of the first blade holder, which are exposed out of the lever, the blade of the first main blade faces upward, the first reinforcing block is fixed on two side surfaces of the lever, the first reinforcing block abuts against the lower side of the first blade holder, the first blade holder is fixedly connected with the upper pulling plate, the first main blade bearing is installed on the lower surface of the first blade holder, and the first main blade bearing is in linear contact with the first main blade.
5. The balance loading unit according to claim 2, wherein the loading support mechanism comprises a lower loading base, a guide post, an upper loading base and a second wire contact mechanism, a roller is mounted below the lower loading base, the roller presses against the table top of the balance to be calibrated, the guide post is connected between the lower loading base and the upper loading base, and the upper loading base is connected with the lever through the second wire contact mechanism.
6. The unequal arm balance loading unit according to claim 5, wherein the second line contact mechanism comprises a second blade holder, a second main blade, a second reinforcing block, a second blade holder and a second main blade, the middle section of the second blade holder is installed in the through hole of the lever, the second main blade is installed at each of two ends of the second blade holder, which are exposed out of the lever, the blade parts of the second main blade face downward, the second reinforcing block is fixed on two side surfaces of the lever, abuts against the upper part of the second blade holder, the second blade holder is fixedly installed with the upper loading holder, the second main blade is installed on the upper surface of the second blade holder, and the second main blade is in linear contact with the second main blade.
7. The unequal arm balance loading unit according to claim 1, wherein the weight mechanism comprises a weight trolley, a weight loading mechanism, a weight series combination, a weight hanger and a third line contact mechanism, the weight trolley comprises a bottom plate, a top plate and a column arranged between the bottom plate and the top plate, the weight loading mechanism comprises a movable support plate and a second lifting mechanism, the second lifting mechanism drives the movable support plate to move up and down along the column, the weight hanger is suspended at the long arm end of the lever through the third line contact mechanism, the weight series combination comprises a plurality of weights connected in series, adjacent weights are connected in series through weight hanging nails, the upper end of the weight series combination is suspended on the weights, and the movable support plate is arranged below the weight series combination.
8. The unequal arm balance loading unit according to claim 7, wherein the third wire contact mechanism comprises a third blade holder, a third main blade, a third blade holder and a third main blade, the third blade holder is mounted on the lever long arm end, the third main blade is mounted on the upper surface of the third blade holder, the blade part of the third main blade faces upward, the third main blade holder is mounted on the lower surface of the third blade holder, and the third main blade is in linear contact with the third main blade.
9. The unequal arm balance loading unit according to claim 7, wherein a lever locking mechanism is arranged on a top plate of the weight trolley, a locking block is arranged at the long arm end of the lever, the lever locking mechanism comprises a locking structure frame, a driving mechanism, a locking screw rod, a guide rod, an upper moving plate, a lower moving plate, an upper pressing head and a lower pressing head, the guide rod is vertically arranged on the locking structure frame, the upper half section and the lower half section of the locking screw rod are provided with two sections of threads with opposite spiral directions, the upper moving plate is sleeved on the guide rod and is arranged on the upper half section of the locking screw rod through a thread sleeve, the lower moving plate is sleeved on the guide rod and is arranged on the lower half section of the locking screw rod through a thread sleeve, the upper pressing head is arranged on the upper moving plate, the lower pressing head is arranged on the lower moving plate, the driving mechanism drives the locking screw rod to rotate, and then drive pressure head and lower pressure head and move towards each other or back to each other, the latch segment is located go up the intermediate position between pressure head and the lower pressure head.
10. A balance verification apparatus comprising at least one unequal arm balance loading unit according to any one of claims 1-9, and a control unit in signal communication with each of the unequal arm balance loading units.
11. A method for calibrating a ground scale, which is characterized in that k unequal arm balance loading units according to claim 1 are adopted, wherein k is more than or equal to 1, and in the unequal arm balance loading units, the length of the arm of the long arm end of a lever is L1The length of the force arm at the end of the short arm is L2Mass of the lever is m01Mass of the loading support mechanism is m02The magnification factor n is L1/L2The method comprises the following steps:
step 1, respectively installing various unequal-arm balance loading units, placing a loading support mechanism on a platform surface of a to-be-detected ground balance, installing a balance pulling mechanism on a ground balance base or a foundation outside the ground balance, installing a first lifting mechanism on the balance pulling mechanism, enabling the balance pulling mechanism to be in a non-force-application state on a lever, installing the lever, adjusting the lever to be in a horizontal balance state, and comparing a reading Z of the ground balance0And (m)01+m02) A difference in x k;
step 2, the total hanging mass at the long arm end of the lever of the k unequal arm balance loading units is m10The weight, draw the balance mechanism to exert pulling force to the short arm end of the lever, adjust through the first lifting mechanism, adjust the lever to the horizontal balance state, compare the reading Z that the earth balance increases1And m10Difference of (n + 1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111145106.7A CN113959550B (en) | 2021-09-28 | 2021-09-28 | Unequal arm balance loading unit, ground balance verification device and ground balance verification method |
| PCT/CN2022/117442 WO2023051200A1 (en) | 2021-09-28 | 2022-09-07 | Unequal-arm balance loading unit, weighbridge calibration device, and weighbridge calibration method |
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| CN202111145106.7A CN113959550B (en) | 2021-09-28 | 2021-09-28 | Unequal arm balance loading unit, ground balance verification device and ground balance verification method |
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| CN113959550B CN113959550B (en) | 2023-05-23 |
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Cited By (1)
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| WO2023051200A1 (en) * | 2021-09-28 | 2023-04-06 | 无锡市检验检测认证研究院 | Unequal-arm balance loading unit, weighbridge calibration device, and weighbridge calibration method |
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| CN117030085B (en) * | 2023-09-27 | 2024-02-06 | 苏州市计量测试院 | Lever type large torque tester |
| CN118150318B (en) * | 2024-05-11 | 2024-07-19 | 中机试验装备股份有限公司 | Full-automatic weight loading mechanical creep testing machine |
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| WO2023051200A1 (en) | 2023-04-06 |
| CN113959550B (en) | 2023-05-23 |
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