CN113959550B - Unequal arm balance loading unit, ground balance verification device and ground balance verification method - Google Patents
Unequal arm balance loading unit, ground balance verification device and ground balance verification method Download PDFInfo
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- CN113959550B CN113959550B CN202111145106.7A CN202111145106A CN113959550B CN 113959550 B CN113959550 B CN 113959550B CN 202111145106 A CN202111145106 A CN 202111145106A CN 113959550 B CN113959550 B CN 113959550B
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Abstract
The invention provides an unequal arm balance loading unit, a ground balance verification device and a ground balance verification method. The unequal arm balance loading unit comprises a lever, a weight mechanism, a loading supporting mechanism, a pulling balance mechanism, a levelness detecting mechanism and a first lifting mechanism for adjusting the level of the lever. And a weight with determined mass is applied to the long arm end of the lever, a certain pulling force is applied to the short arm end of the lever by the pulling balancing mechanism so as to keep balance, and the equivalent mass of the weight mass at the long arm end and the pulling force applied by the pulling balancing mechanism at the short arm end is transferred to the ground balancing table surface by the loading supporting mechanism serving as a lever fulcrum. The invention can complete the calibration and detection of the ground balance by means of the amplifying action of the lever and only adopting a loading unit with the mass of about one tenth or even about one tenth of the traditional weight verification mode during the detection. The ground balance verification device disclosed by the invention has the advantages of small occupied space, convenience in transportation and storage, capability of greatly improving the ground balance verification efficiency and reduction of verification cost.
Description
Technical Field
The invention relates to the technical field of ground balance verification, in particular to an unequal arm balance loading unit, a ground balance verification device and a ground balance verification method.
Background
The ground scale is a scale for weighing the car and the loaded goods together. In order to ensure the measurement accuracy of the ground balance, the ground balance needs to be regularly verified. The maximum measuring range of the ground balance is tens tons to hundreds tons, the current ground balance verification is to adopt standard weights for comparison verification, standard weight blocks with the total mass of hundreds tons are required to be configured according to the traditional verification method for the ground balance of hundreds tons, and the storage and transportation of the standard weight blocks are very inconvenient due to the large mass and large occupied space of the required standard weight blocks, so that the verification cost is high.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an unequal arm balance loading unit, a ground balance verification device and a ground balance verification method.
In order to achieve the above 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 of the weight mechanism is loaded at the long arm end of the lever;
the upper end of the loading supporting mechanism is supported at the fulcrum position of the lever, and the lower end of the loading supporting mechanism is pressed against the ground balance table surface to be verified;
the upper end of the pulling balance mechanism acts on the short arm end of the lever, and the bottom of the pulling balance mechanism is fixedly connected to the ground balance base or a foundation outside the ground balance;
a levelness detection mechanism for detecting 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, weights with determined mass are applied to the long arm ends of the levers, a certain pulling force is applied to the short arm ends of the levers by the pulling balancing mechanism so as to keep balance, and the equivalent mass of the weights at the long arm ends and the pulling force applied by the pulling balancing mechanism at the short arm ends is transferred to a ground balancing table surface by the loading supporting 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 of the long arm end, namely the lever amplification ratio, so that the mass value loaded on the ground balance table top is accurately obtained. The invention can complete the calibration and detection of the ground balance by means of the amplification effect of the lever and only adopting a loading unit with the mass about one tenth or even about one tenth of that of the traditional weight verification mode during the detection.
Further, the balance pulling mechanism comprises a balance pulling frame, an upper pulling plate and a first line contact mechanism, wherein the balance pulling frame is fixedly connected to the ground balance base or the foundation outside the ground balance, the first lifting mechanism is installed between the balance pulling frame and the upper pulling plate, the upper pulling 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.
By adopting the preferable scheme, the first lifting mechanism is arranged on the pulling balance frame fixed on the firm base body, so that the structural stability is improved.
Further, the lifting device further comprises a rotating shaft seat, the rotating shaft seat is installed on the pull balancing frame, 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 perpendicular to the length direction of the lever, and the telescopic shaft of the first lifting mechanism is connected with the upper pull plate through a spherical joint mechanism.
With the adoption of the preferable scheme, the balance frame is pulled to generate a pulling force which is vertical to the lever.
Further, the first line contact mechanism includes first cutting edge seat, first main cutting edge, first boss, first knife rest and first main knife rest, the interlude of first cutting edge seat is installed in the through-hole of lever, first main cutting edge is installed respectively at the both ends of exposing the lever on the first cutting edge seat, the cutting part of first main cutting edge is upwards, first boss is fixed the both sides face of lever, just first boss supports and leans on the below of first cutting edge seat, first knife rest with upper arm-tie fixed connection, first main knife rest is installed first knife rest lower surface, first main knife rest with first main knife edge linear contact.
By adopting the preferable scheme, the contact area of the balancing mechanism and the lever is reduced, and the horizontal linear contact perpendicular to the lever is realized, so that when the lever is horizontally balanced, the acting force of the balancing mechanism on the lever is along the vertical direction, and the accuracy of equivalent mass on the ground balance is improved.
Further, the loading supporting mechanism comprises a lower loading seat, a guide pillar, an upper loading seat and a second line contact mechanism, wherein a roller is arranged below the lower loading seat and is pressed against a ground balance table surface to be verified, 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 ground balance table surface, and the roller mechanism is adopted, so that the loading supporting mechanism and the ground balance table surface can freely roll in the horizontal direction, the degree of freedom of the horizontal plane of the ground balance is not changed, and the reading accuracy is improved.
Further, a guide sleeve is arranged on the pulling balance frame, and the guide sleeve is sleeved on the guide post of the loading support mechanism.
By adopting the preferable scheme, the position between the pulling balance mechanism and the loading support mechanism can be kept stable, and the support force and the pulling balance force can be kept vertically parallel.
Further, the guide sleeve is of a two-half structure and further comprises a driving mechanism for controlling the guide sleeve to be opened and closed.
By adopting the preferable scheme, in the lever leveling process, the guide sleeve is matched with the guide post, so that the position of the loading supporting mechanism is ensured to be kept stable; after the horizontal adjustment is completed, the guide sleeve and the guide post are released, so that the weight quality and the equivalent weight of the pull balance are ensured to be completely released on the ground balance table top, and the accuracy of the loading quality 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 seat, wherein the middle section of the second blade seat is arranged in a through hole of the lever, the second main blade is respectively arranged at two ends of the second blade seat, which are exposed out of the lever, the blade parts of the second main blade face downwards, the second reinforcing block is fixed on two side surfaces of the lever, the second reinforcing block is propped against the upper part of the second blade seat, the second blade seat is fixedly arranged with the upper loading seat, the second main blade seat is arranged on the upper surface of the second blade seat, and the second main blade seat 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, and the horizontal linear contact perpendicular to the lever is realized, so that 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 comprises a weight trolley, a weight loading mechanism, a weight series connection combination, a weight hanging frame and a third wire contact mechanism, the weight trolley comprises a bottom plate, a top plate and an upright post arranged between the bottom plate and the top plate, the weight loading mechanism comprises a movable supporting plate and a second lifting mechanism, the second lifting mechanism drives the movable supporting plate to lift along the upright post, the weight hanging frame is suspended at the long arm end of the lever through the third wire contact mechanism, the weight series connection combination comprises a plurality of weights which are mutually connected in series, the weights are connected in series through weight hanging nails, the upper end of the weight series connection combination is suspended on the weight hanging frame, and the movable supporting plate is arranged below the weight series connection combination.
By adopting the preferable scheme, the automatic stable loading of the weights is conveniently realized.
Further, the weight trolley is placed on a floor scale table surface to be verified, or the weight trolley is arranged on a support frame transversely and overhead above the floor scale table surface.
Further, the third wire contact mechanism comprises a third blade seat, a third main blade, a third blade seat and a third main blade seat, wherein the third blade seat is arranged on the long arm end of the lever, the third main blade is arranged on the upper surface of the third blade seat, the blade part of the third main blade faces upwards, the third main blade seat is arranged on the lower surface of the third blade seat, and the third main blade seat is in linear contact with the third main blade.
By adopting the preferable scheme, the contact area between the weight hanging frame and the lever is reduced, and the horizontal linear contact perpendicular to the lever is realized, so that the acting force of the weight on the lever is along the vertical downward direction when the lever is horizontally balanced.
Further, 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 threads with opposite screw 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 so as to drive the upper pressing head and the lower pressing head to move in opposite directions or back to back, and the locking block is positioned at the middle position between the upper pressing head and the lower pressing head.
By adopting the preferable scheme, the lever position is temporarily locked through the lever locking mechanism in the weight loading process, and the locking is released after the weight loading is completed, so that the lever levelness can be adjusted more quickly.
The device for calibrating the ground balance comprises at least one unequal arm balance loading unit and a control unit, wherein the control unit is in signal connection with each unequal arm balance loading unit.
By adopting the technical scheme of the invention, the number of the loading units required to be deployed simultaneously is selected according to the total loading equivalent mass of the loading units of the unequal arm balances and the maximum tonnage of the ground balance to be identified. The mass of the whole ground balance calibrating device is only equivalent to one tenth or even a few tenth of that of the traditional weight calibrating method, and the full-range multipoint calibration and detection of the ground balance can be realized by means of the amplifying function of the lever, and the unbalanced load test, the ground balance strength test and the like can be realized.
A ground balance verification method adopts k scales with different armsThe loading unit, wherein k is more than or equal to 1, in the unequal arm balance loading unit, the length of the arm of the long arm end of the lever is L 1 The length of the arm of force at the short arm end is L 2 The mass of the lever is m 01 The mass of the loading supporting mechanism is m 02 Magnification n=l 1 /L 2 Comprising the following steps:
step 1, respectively installing each unequal arm balance loading unit, placing a loading supporting mechanism on a ground balance table surface to be verified, installing a pulling balance mechanism on a ground balance base or a foundation outside the ground balance, installing a first lifting mechanism on the pulling balance mechanism, enabling the pulling balance mechanism to be in a non-force-applying state on a lever, installing the lever, adjusting the lever to be in a water balance state, and comparing the ground balance readings Z 0 And (m) 01 +m 02 ) Differences in k;
step 2, hanging mass sum of the lever long arm ends of the k unequal arm balance loading units to m 10 The balance pulling mechanism applies a pulling force to the short arm end of the lever, the lever is adjusted to a horizontal balance state through the adjustment of the first lifting mechanism, and the reading Z increased by the ground balance is compared 1 And m is equal to 10 * (n+1) differences.
By adopting the technical scheme, the loading of the large mass of the ground balance 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 invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the unequal arm balance loading unit of the invention;
FIG. 3 is a schematic diagram of an unequal arm balance;
FIG. 4 is a partial block diagram of the load support mechanism and the pull balancing mechanism;
FIG. 5 is a partial block diagram of the weight mechanism;
FIG. 6 is a schematic view of a lever capture mechanism;
FIG. 7 is a partial block diagram of the first line contact mechanism;
FIG. 8 is a partial block diagram of the second wire contact mechanism;
FIG. 9 is a partial block diagram of the third wire contact mechanism;
fig. 10 is a schematic structural view of another embodiment of the present invention.
Names of the corresponding parts indicated by numerals and letters in the drawings:
100-loading units; 110-lever; 1101-long arm end; 1102-short arm end; 1103-locking block; 120-weight mechanism; 121-weight trolley; 1211-a bottom plate; 1212-top plate; 1213-posts; 122-weight loading mechanism; 1221-moving pallets; 1222-a second lifting mechanism; 123-weight series connection combination; 1231-weight; 124-weight rack; 125-a third wire contact mechanism; 1251-third blade holder; 1252-third main blade; 1253-third knife holder; 1254-third master knife multiplication; 130-loading a support mechanism; 131-lower load seat; 132-guide posts; 133-upper load-bed; 134-a second line contact mechanism; 1341-a second blade holder; 1342-a second major edge; 1343-second reinforcement block; 1344-second knife holder; 1345-second master knife multiplication; 140-pulling a balancing mechanism; 141-pulling a balance frame; 142-upper pull plate; 143-a first line contact mechanism; 1431—a first blade seat; 1432-a first main blade; 1433-a first stiffener; 1434-a first tool holder; 1435-a first master knife rest; 144-a rotating shaft seat; 145-pin shafts; 146-spherical joint mechanism; 147-guide sleeve; 150-a first lifting mechanism; 160-lever locking mechanism; 1601-capture structure frame; 1602-a drive mechanism; 1603-locking screw rod; 1604-a guide bar; 1605-upper moving plate; 1606-lower moving plate; 1607-upper ram; 1608-lower ram; 201-a ground balance table top; 202-ground balance base.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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, the weight of which is loaded on the long arm end 1101 of the lever;
the upper end of the loading supporting mechanism 130 is supported at the fulcrum position of the lever 110, and the lower end of the loading supporting mechanism is pressed against the ground balance table 201 to be verified;
the pull balancing mechanism 140, the upper end of which acts on the short arm end 1102 of the lever, the bottom of which is fixedly connected to the ground balance base 202 or the foundation outside the ground balance;
a levelness detection mechanism for detecting levelness of the lever 110;
a first elevating mechanism 150 mounted on the pull balancing mechanism 140, the first elevating mechanism 150 for adjusting the levelness of the lever 110.
In figure 3 a schematic diagram of an unequal arm balance employed in the present invention is shown,
n＝L 1 /L 2 ＝F 2 /F 1 ＝m 2 g/m 1 g,
wherein n is the magnification of the lever, L 1 Length of arm at long arm end, L 2 The length of the arm of force is the short arm end;
F 1 for weight mass m 1 Force produced, F 1 ＝m 1 g；
F 2 To balance the forces generated by the mechanism, F 2 ＝m 2 g，m 2 Is F 2 Equivalent mass, m 2 ＝n*m 1 ；
Fulcrum pairSupporting force f=f generated by lever 1 +F 2 F is equal to the downward force of the lever to the fulcrum, and the gravitational acceleration g is identical at the same place on the earth, i.e. the equivalent mass of the lever applied to the fulcrum is m=m 1 +m 2 ＝(n+1)*m 1 。
The beneficial effects of adopting above-mentioned technical scheme are: the method comprises the steps that weights with determined mass are applied to the long arm ends of a lever, a pull balancing mechanism applies a certain pulling force to the short arm ends of the lever to keep balance, and a loading supporting mechanism serving as a lever fulcrum transfers the equivalent mass of the weights at the long arm ends and the pulling force applied by the pull balancing mechanism at the short arm ends to a ground balance table top; 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 of the long arm end, namely the lever amplification ratio, so that the mass value loaded on the ground balance table top is accurately obtained. The invention can complete the calibration and detection of the ground balance by means of the amplification effect of the lever and only adopting a loading unit with the mass about one tenth or even about one tenth of that of the traditional weight verification mode during the detection.
In other embodiments of the present invention, the levelness detection mechanism employs a high-precision displacement sensor or an angle sensor, the first lifting mechanism 150 employs a worm gear transmission mechanism and a servo motor as a drive, the control unit collects levelness signals detected by the levelness detection mechanism in real time, and the level is maintained by closed-loop control of the lever position through adjustment of the servo motor.
As shown in fig. 4, in other embodiments of the present invention, the leveling mechanism 140 includes a leveling frame 141, an upper plate 142 and a first line contact mechanism 143, the leveling frame 141 is fixedly connected to a ground level base or a foundation base outside the ground level, the first elevating mechanism 150 is installed between the leveling frame 141 and the upper plate 142, the upper plate 142 is connected to a short arm end 1102 of the lever through the first line contact mechanism 143, and a contact line of the first line contact mechanism 143 is horizontal and perpendicular to a length direction of the lever 110. Wherein, draw the balanced frame and be connected of the body base of the ground balance or ground balance basis and will stabilize and can bear the strength that produces when loading, its connected mode has three kinds: firstly, preassembling bolts on steel structural beams of a base of a floor scale body, and firmly connecting a lower end base of a pull balance frame with the base of the scale body through bolts and nuts; secondly, arranging a plurality of fixing devices on the ground balance concrete foundation, such as stainless steel chemical bolts which are arranged in the concrete and are level with the plane of the ground balance concrete foundation, wherein each stainless steel chemical bolt is provided with a threaded hole, and fixing the balance pulling device through the threaded hole mounting bolts; thirdly, fixing the flat steel plate on a steel beam of the ground balance base or a concrete foundation, and then adsorbing and fixing the base of the balancing mechanism through the magnetic force of the powerful permanent magnet. The beneficial effects of adopting above-mentioned technical scheme are: the first lifting mechanism is arranged on the pulling balance frame fixed on the firm base body, so that the structural stability is improved.
As shown in fig. 4, in other embodiments of the present invention, the present invention further includes a rotating shaft seat 144, the rotating shaft seat 144 is mounted on the pull balance frame 141, the rotating shaft seat 144 is connected to the base of the first lifting mechanism 150 through a pin 145, the axis direction of the pin 145 is horizontal and perpendicular to the length direction of the lever, and the telescopic shaft of the first lifting mechanism 150 is connected to the pull-up plate 142 through a spherical joint mechanism 146. The beneficial effects of adopting above-mentioned technical scheme are: ensure that the pull balance frame generates a pulling force which is vertical to the lever.
In other embodiments of the present invention, as shown in fig. 4, the loading support mechanism 130 includes a lower loading base 131, a guide post 132, an upper loading base 133, and a second line contact mechanism 134, a roller is mounted under the lower loading base 131, the roller is pressed against the floor to be inspected, 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 through the second line contact mechanism 134. The beneficial effects of adopting above-mentioned technical scheme are: the loading support mechanism is in contact with the ground balance table surface, and the roller mechanism is adopted, so that the loading support mechanism and the ground balance table surface can freely roll in the horizontal direction, the degree of freedom of the horizontal plane of the ground balance 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 provided on the leveling rack 141, and the guide sleeve 147 is sleeved on the guide post 132 of the loading support mechanism. The beneficial effects of adopting above-mentioned technical scheme are: the position between the pulling balance mechanism and the loading support mechanism can be kept stable, and the support force and the pulling balance force can be kept vertically parallel.
In other embodiments of the present invention, the guide sleeve is of a two-half structure, and further includes a driving mechanism for controlling the opening and closing of the guide sleeve. The beneficial effects of adopting above-mentioned technical scheme are: in the lever leveling process, the guide sleeve is matched with the guide post 132, so that the position of the loading supporting mechanism is ensured to be kept stable; after the horizontal adjustment is completed, the guide sleeve and the guide post 132 are released, so that the weight mass and the equivalent mass of the pull balance are ensured to be completely released on the ground balance table surface, and the accuracy of the loading mass is improved.
In other embodiments of the present invention, as shown in fig. 5, the weight mechanism 120 comprises a weight trolley 121, a weight loading mechanism 122, a weight serial connection combination 123, a weight hanging rack 124 and a third wire contact mechanism 125, wherein the weight trolley 121 comprises a bottom plate 1211, a top plate 1212 and a vertical post 1213 arranged between the bottom plate 1211 and the top plate 1212, the weight loading mechanism 122 comprises a movable supporting plate 1221 and a second lifting mechanism 1222, the second lifting mechanism 1222 drives the movable supporting plate 1221 to lift along the vertical post 1213, the weight hanging rack 124 is hung on the long arm end 1101 of the lever through the third wire contact mechanism 125, the weight serial connection combination 123 comprises a plurality of weights 1231 connected in series, the adjacent weights are connected in series through weight hanging nails, the upper end of the weight serial connection combination 123 is hung below the weight hanging rack 124, and the movable supporting plate 1221 is arranged below the weight serial connection combination 123 for sequentially supporting the weights when lifted. The beneficial effects of adopting above-mentioned technical scheme are: the automatic stable loading of the weights is conveniently realized.
In other embodiments of the invention, the weight trolley is disposed on a support frame that is laterally elevated above the floor scale table, with two ends of the support frame being respectively attached to the foundation frames on two sides of the floor scale. Thus, after a certain weight is loaded on the long arm end of the lever, the mass increment obtained on the ground balance table surface is the sum of the weight mass and the equivalent mass generated by the balance pulling mechanism on the short arm end of the lever, namely the mass increment is the mass of the loaded weight (lever amplification ratio +1).
In other embodiments of the invention, the weight trolley 121 is placed on the floor scale table to be inspected so that upon initial inspection of the floor scale, the total mass of the weight mechanism also adds to the initial loaded total mass. And after a certain weight is loaded at the long arm end of the lever, the mass of the weights on the weight trolley is correspondingly reduced, but all the weights are always finally loaded on the ground balance table surface, at the moment, the obtained mass increment on the ground balance table surface is only equivalent mass generated by the pulling balance mechanism at the short arm end of the lever, namely, the mass increment is only the mass of the loaded weights, namely, the lever amplification ratio.
In other embodiments of the present invention, as shown in fig. 7-9, to ensure that the weight-to-lever weight, the pull force of the pull balancing mechanism to the lever, and the support force of the load support mechanism to the lever are all along the vertical direction, the accuracy of the mass ultimately loaded to the floor scale is prevented from being affected by other directional force components. The first line contact mechanism 143 includes a first blade holder 1431, a first main blade 1432, a first reinforcing block 1433, a first blade holder 1434 and a first main blade holder 1435, wherein the middle section of the first blade holder 1431 is installed in the through hole of the lever 110, the two ends of the first blade holder 1431 exposed out of the lever are respectively provided with the first main blade 1432, the blade part of the first main blade 1432 faces upwards, the first reinforcing block 1433 is fixed on two side surfaces of the lever, the first reinforcing block 1433 is abutted against the lower part of the first blade holder 1431, the first blade holder 1434 is fixedly connected with the upper pull plate 142, the first main blade holder 1435 is installed on the lower surface of the first blade holder 1434, and the first main blade holder 1435 is in linear contact with the first main blade 1432. The second line contact mechanism 134 includes a second blade holder 1341, a second main blade 1342, a second reinforcing block 1343, a second blade holder 1344, and a second main blade holder 1345, the middle section of the second blade holder 1341 is mounted in the through hole of the lever 110, the second main blade 1342 is mounted at both ends of the second blade holder 1341 exposing the lever, the edge of the second main blade 1342 faces downward, the second reinforcing block 1343 is fixed at both sides of the lever, and the second reinforcing block 1343 abuts against the top of the second blade holder 1341, the second blade holder 1344 is fixedly mounted with the upper loading holder 133, the second main blade holder 1345 is mounted on the upper surface of the second blade holder 1344, and the second main blade holder 1345 is in linear contact with the second main blade 1342. The third wire contacting mechanism 125 includes a third blade holder 1251, a third main blade 1252, a third blade holder 1253, and a third main blade holder 1254, the third blade holder 1251 is mounted on the lever long arm end 1101, the third main blade 1252 is mounted on the upper surface of the third blade holder 1251, the blade portion of the third main blade 1252 is directed upward, the third main blade holder 1254 is mounted on the lower surface of the third blade holder 1253, and the third main blade holder 1254 is in linear contact with the third main blade 1252. As is apparent from the illustration, the first, second and third main cutting edges 1432, 1342, 1252 each have a small angle V-shaped sharp corner in cross section, and the first, second and third main cutting bearings 1435, 1345, 1254 each have a large angle V-shaped groove, such that the main cutting edges have a rocking degree of freedom within the main cutting bearings. In particular, the first main blade 1432, the second main blade 1342, and the third main blade 1252 are fixedly mounted on the lever 110, so as to ensure that the force action point and the pivot point are kept stable, and the long arm length and the short arm length are conveniently and highly accurately configured, so that the equivalent mass loaded on the ground balance table surface can be accurately calculated, and the loading precision 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 a weight trolley 121, a locking block 1103 is mounted on 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 ram 1607 and a lower ram 1608, the guide rod 1604 is vertically mounted on the locking structure frame 1601, the upper half and the lower half of the locking screw 1603 have threads with opposite screw directions, the upper moving plate 1605 is sleeved on the guide rod 1604 and is mounted on the upper half of the locking screw 1603 through a screw sleeve, the lower moving plate 1606 is sleeved on the guide rod 1604 and is mounted on the lower half of the locking screw 1603 through a screw sleeve, the upper ram 1607 is mounted on the upper moving plate 1605, the lower ram 1608 is mounted on the lower moving plate 1606, the driving mechanism 1602 drives the locking screw 1603 to rotate, and further drives the upper ram 1607 and the lower ram 1608 to move in opposite directions or back directions, and the locking block 1103 is located at a position intermediate between the upper ram 1607 and the lower ram 1603. The beneficial effects of adopting above-mentioned technical scheme are: 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 completed, so that the lever levelness can be adjusted more quickly.
In another embodiment of the present invention, as shown in fig. 10, a floor scale verification apparatus 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 the loading units required to be deployed simultaneously according to the total loading equivalent mass of the loading units of the unequal arm balance and the maximum tonnage of the ground balance to be identified. For example, the equivalent mass loaded by one loading unit is 10 tons, and 2, 5, 8, 10 and 20 loading units can be deployed simultaneously according to the requirement for verifying the truck scale of 20 tons, 50 tons, 80 tons, 100 tons and 200 tons. For a loading unit 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 of the equivalent mass of 10 tons, so that the mass of the whole ground balance verification device is only equivalent to one tenth of that of a traditional weight verification mode, the full-range multipoint calibration detection of the ground balance can be realized, and the unbalanced load test, the ground balance strength test and the like can be realized.
A method for verifying the ground balance 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 a long arm end arm of a lever is L 1 The length of the arm of force at the short arm end is L 2 The mass of the lever is m 01 The mass of the loading supporting mechanism is m 02 Magnification n=l 1 /L 2 Comprising the following steps:
step 1, respectively installing each unequal arm balance loading unit, placing a loading supporting mechanism on a ground balance table surface to be verified, installing a pulling balance mechanism on a ground balance base or a foundation outside the ground balance, installing a first lifting mechanism on the pulling balance mechanism, enabling the pulling balance mechanism to be in a non-force-applying state on a lever, installing the lever, adjusting the lever to be in a water balance state, and comparing the ground balance readings Z 0 And (m) 01 +m 02 ) Differences in k;
step 2, hanging mass sum of the lever long arm ends of the k unequal arm balance loading units to m 10 The balance pulling mechanism applies a pulling force to the short arm end of the lever, the lever is adjusted to a horizontal balance state through the adjustment of the first lifting mechanism, and the reading Z increased by the ground balance is compared 1 And m is equal to 10 * (n+1) differences.
By adopting the technical scheme, the loading of the large mass of the ground balance by the small-mass weight is realized by means of the amplification effect of the unequal arm balance lever.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, but not limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (9)
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 of the weight mechanism is loaded at the long arm end of the lever;
the upper end of the loading supporting mechanism is supported at the fulcrum position of the lever, and the lower end of the loading supporting mechanism is pressed against the ground balance table surface to be verified;
the upper end of the pulling balance mechanism acts on the short arm end of the lever, and the bottom of the pulling balance mechanism is fixedly connected to the ground balance base or a foundation outside the ground balance;
a levelness detection mechanism for detecting levelness of the lever;
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;
the lifting mechanism is arranged between the lifting balance frame and the upper pulling plate, the upper pulling 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 vertical to the length direction of the lever;
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 arranged below the lower loading seat and is pressed against a ground balance table surface to be detected, the guide pillar is 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;
the pulling balance frame is provided with a guide sleeve, and the guide sleeve is sleeved on the guide post of the loading support mechanism.
2. The unequal arm balance loading unit according to claim 1, further comprising a rotating shaft seat, wherein the rotating shaft seat is mounted on the pull balancing frame, 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 perpendicular to the length direction of the lever, and the telescopic shaft of the first lifting mechanism is connected with the pull-up plate through a spherical joint mechanism.
3. The unequal arm balance loading unit according to claim 1, wherein the first line contact mechanism comprises a first blade seat, a first main blade, a first reinforcing block, a first blade bearing seat and a first main blade bearing, the middle section of the first blade seat is installed in the through hole of the lever, the first main blade is installed at two ends of the first blade seat, which are exposed out of the lever, respectively, the blade part of the first main blade faces upwards, the first reinforcing block is fixed at two side surfaces of the lever, the first reinforcing block is abutted under the first blade seat, the first blade bearing seat is fixedly connected with the upper pulling plate, the first main blade bearing seat is installed on the lower surface of the first blade bearing seat, and the first main blade bearing seat is in linear contact with the first main blade.
4. The unequal arm balance loading unit according to claim 1, wherein 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 seat, the middle section of the second blade seat is installed in a through hole of the lever, the second main blade is installed at two ends of the second blade seat, which are exposed out of the lever, the blade parts of the second main blade face downwards, the second reinforcing block is fixed at two side faces of the lever, the second reinforcing block is abutted against the upper side of the second blade seat, the second blade seat is fixedly installed with the upper loading seat, the second main blade seat is installed on the upper surface of the second blade seat, and the second main blade seat is in linear contact with the second main blade.
5. 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 connection combination, a weight hanging frame and a third wire contact mechanism, the weight trolley comprises a bottom plate, a top plate and a stand column arranged between the bottom plate and the top plate, the weight loading mechanism comprises a movable supporting plate and a second lifting mechanism, the second lifting mechanism drives the movable supporting plate to lift and move along the stand column, the weight hanging frame is hung at the long arm end of the lever through the third wire contact mechanism, the weight series connection combination comprises a plurality of weights which are mutually connected in series, the adjacent weights are connected in series through weight hanging nails, the upper end of the weight series connection combination is hung on the weight hanging frame, and the movable supporting plate is arranged below the weight series connection combination.
6. The unequal arm balance loading unit of claim 5 wherein the third line contact mechanism comprises a third blade mount mounted on the lever long arm end, a third main blade mounted on an upper surface of the third blade mount with an edge portion of the third main blade facing upward, a third main blade mounted on a lower surface of the third blade mount, and a third main blade mount in linear contact with the third main blade.
7. The unequal arm balance loading unit according to claim 6, wherein a lever locking mechanism is arranged on a top plate of the weight trolley, a locking block is arranged at a 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 pressure head and a lower pressure head, the guide rod is vertically arranged on the locking structure frame, an upper half section and a lower half section of the locking screw rod are provided with threads with opposite screw 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 pressure head is arranged on the upper moving plate, the lower moving plate is arranged on the lower pressure head, the driving mechanism drives the locking screw rod to rotate, and further drives the upper pressure head and the lower pressure head to move oppositely or back to each other, and the locking block is positioned at an intermediate position between the upper pressure head and the lower pressure head.
8. A floor balance verification device, characterized in that it comprises at least one unequal arm balance loading unit according to any one of claims 1-7, and a control unit, said control unit being in signal connection with each of said unequal arm balance loading units.
9. A method for verifying the ground balance is characterized in that k unequal arm balance loading units as claimed in claim 1 are adopted, wherein k is larger than or equal to 1, and in the unequal arm balance loading units, the length of a long arm end arm of a lever is L 1 The length of the arm of force at the short arm end is L 2 The mass of the lever is m 01 The mass of the loading supporting mechanism is m 02 Magnification n=l 1 / L 2 Comprising the following steps:
step 1, respectively installing each unequal arm balance loading unit, placing a loading supporting mechanism on a ground balance table surface to be verified, installing a leveling mechanism on a ground balance base or a foundation outside the ground balance, installing a first lifting mechanism on the leveling mechanism, and levelingThe balance mechanism is in a non-force-applying state to the lever, the lever is installed and adjusted to a horizontal balance state, and the ground balance reading Z is compared 0 And (m) 01 + m 02 ) Differences in k;
step 2, hanging mass sum of the lever long arm ends of the k unequal arm balance loading units to m 10 The balance pulling mechanism applies a pulling force to the short arm end of the lever, the lever is adjusted to a horizontal balance state through the adjustment of the first lifting mechanism, and the reading Z increased by the ground balance is compared 1 And m is equal to 10 * (n+1) differences.
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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 |
| 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 (en) * | 2021-09-28 | 2023-05-23 | 无锡市检验检测认证研究院 | Unequal arm balance loading unit, ground balance verification device and ground balance verification method |
| CN117870927A (en) * | 2023-09-27 | 2024-04-12 | 苏州市计量测试院 | Lever type large torque tester for detecting loading force by using standard force sensor |
| CN118150318A (en) * | 2024-05-11 | 2024-06-07 | 中机试验装备股份有限公司 | Full-automatic weight loading mechanical creep testing machine |
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