WO2023051200A1 - Unequal-arm balance loading unit, weighbridge calibration device, and weighbridge calibration method - Google Patents

Abstract

An unequal-arm balance loading unit (100), a weighbridge calibration device, and a weighbridge calibration method. The unequal-arm balance loading unit comprises a lever (110), a weight mechanism (120), a loading supporting mechanism (130), a pulling balancing mechanism (140), a levelness measurement mechanism, and a first lifting mechanism (150) configured to adjust the level of the lever (110). A weight with determined mass is applied to a long arm end (1101) of the lever (110), the pulling balancing mechanism (140) applies a certain pulling force to a short arm end (1102) of the lever (110) to keep balance, and the loading supporting mechanism (130) acting as a fulcrum of the lever (110) transfers the mass of the weight at the long arm end (1101) and the equivalent mass of the pulling force applied, by the pulling balancing mechanism (140), to the short arm end (1102) to a platform surface (201) of a weighbridge. By means of the amplification function of the lever (110), during calibration, only the loading unit (100) with about one tenth or even a few tenths of the mass of a conventional weight calibration method needs to be used to complete calibration measurement of the weighbridge. The weighbridge calibration device occupies a small space, and is easy to transport and store, thereby significantly improving the calibration efficiency of the weighbridge, and reducing the calibration cost.

Description

A loading unit of an unequal arm balance, a ground balance verification device and a ground balance verification method technical field

The invention relates to the technical field of geobalance verification, in particular to a loading unit of an unequal arm balance, a geoscale verification device and a geobalance verification method.

Background technique

A floor scale is a scale that weighs a car and its cargo. In order to ensure the measurement accuracy of the ground balance, it is necessary to check the ground balance regularly. Generally, the maximum measuring range of a ground balance is dozens of tons to hundreds of tons. At present, the verification of the ground balance is to use standard weights for comparative verification. For a standard weight block of 100 tons, due to the large quality of the required standard weight block and the large space occupied, the storage and transportation of the standard weight block are very inconvenient, resulting in high verification costs.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a loading unit of an unequal arm balance, a ground balance verification device and a ground balance verification method.

In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problems is: a loading unit for an unequal arm balance, comprising:

a lever, which is divided by a fulcrum into a long arm end and a short arm end;

a weight mechanism, the weight of the weight mechanism is loaded on the long arm end of the lever;

A loading support mechanism, 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 against the ground scale platform to be verified;

Pull balance mechanism, 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 the base of the ground balance or the foundation foundation outside the ground balance;

A levelness detection mechanism, which is used to detect the levelness of the lever;

The first lifting mechanism is installed on the loading support mechanism or the pulling balance mechanism, and the first lifting mechanism is used for adjusting the levelness of the lever.

Adopting the technical solution of the present invention, a weight with a certain mass is applied to the long arm end of the lever, and the pulling balance mechanism applies a certain pulling force to the short arm end of the lever to maintain balance, and the loading support mechanism as the fulcrum of the lever combines the mass of the weight at the long arm end and the short arm end. The equivalent mass of the pulling force applied by the arm end pulling balance mechanism is transferred to the ground scale platform; the lever is adjusted to a horizontal state through the first lifting mechanism and the levelness detection mechanism, and the equivalent mass of the short arm end is the weight mass of the long arm end*lever The magnification ratio is used to accurately obtain the mass value loaded on the ground scale platform. With the help of the amplification effect of the lever, the present invention only needs to use a loading unit with a mass of about one-tenth or even several tenths of the traditional weight verification method to complete the calibration and detection of the ground balance. The loading unit of the present invention takes up a lot of space Small, convenient for transportation and storage, can greatly improve the efficiency of geobalance verification and reduce the cost of verification.

Further, the pull balance mechanism includes a pull balance frame, an upper pull plate and a first line contact mechanism, the pull balance frame is fixedly connected to the base of the floor balance or the foundation foundation outside the floor balance, and the first lifting mechanism Installed between the pull balance frame and the upper pull plate, the upper pull plate is connected to 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 perpendicular to the length direction of the lever.

By adopting the above preferred solution, the first lifting mechanism is arranged on the tension balance frame fixed on the firm base, which improves the structural stability.

Further, it also includes a rotating shaft seat, the rotating shaft seat is installed on the pulling balance frame, the rotating shaft seat is connected with the base of the first lifting mechanism through a pin shaft, and the axial direction of the pin shaft is horizontal state and perpendicular to the length direction of the lever, the telescopic shaft of the first lifting mechanism is connected to the upper pull plate through a spherical joint mechanism.

By adopting the above preferred solution, it is ensured that pulling the balance frame produces a pulling force that is perpendicular to the lever.

Further, the first line contact mechanism includes a first blade seat, a first main blade, a first reinforcement block, a first blade seat and a first main knife seat, and the middle section of the first blade seat is installed on the In the through hole of the lever, the two ends of the lever exposed on the first blade seat are respectively equipped with a first main blade, the edge of the first main blade faces upward, and the first reinforcing block is fixed on the two ends of the lever. side, and the first reinforcing block abuts against the bottom of the first blade seat, the first knife seat is fixedly connected with the upper pull plate, and the first main knife seat is installed on the first knife The lower surface of the seat, the first main tool support is in linear contact with the first main cutting edge.

By adopting the above-mentioned preferred scheme, the contact area between the pulling balance 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 force exerted by the pulling balance mechanism on the lever is along the vertical direction, increasing the force to the ground. The accuracy of the equivalent mass on the scale.

Further, the loading support mechanism includes a lower loading seat, a guide post, an upper loading seat and a second line contact mechanism, rollers are installed under the lower loading seat, and the rollers press against the platform of the ground scale to be verified, and the guide post Vertically connected between the lower loading seat and the upper loading seat, the upper loading seat is connected to the lever through the second line contact mechanism.

By adopting the above-mentioned preferred scheme, the loading support mechanism is in contact with the platform of the ground scale using a roller mechanism, and the loading support mechanism and the platform of the ground scale can freely roll in the horizontal direction without changing the degree of freedom of the horizontal plane of the ground balance, thereby improving the accuracy of readings.

Further, a guide sleeve is provided on the pulling balance frame, and the guide sleeve is sleeved on the guide post of the loading support mechanism.

By adopting the above preferred solution, 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 has a two-half structure, and also includes a driving mechanism for controlling the opening and closing of the guide sleeve.

Using the above preferred scheme, during the leveling process of the lever, the guide sleeve cooperates with the guide post to ensure that the position of the loading support mechanism remains stable; after the level adjustment is completed, the guide sleeve and the guide post are released to ensure the weight quality and pull balance. The equivalent mass is completely released on the ground scale table, which improves the accuracy of the loaded mass.

Further, the second line contact mechanism includes a second blade seat, a second main blade, a second reinforcement block, a second knife seat and a second main knife seat, and the middle section of the second blade seat is installed on the lever In the through hole of the second blade seat, the two ends of the lever exposed on the second blade seat are respectively equipped with a second main blade, the edge of the second main blade faces downward, and the second reinforcing block is fixed on both sides of the lever , and the second reinforcing block abuts against the top of the second blade seat, the second knife seat is fixedly installed with the upper loading seat, and the second main knife seat is installed on the second knife seat The upper surface of the seat, the second main knife is in linear contact with the second main knife edge.

By adopting the above preferred solution, 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 when the lever is horizontally balanced, the force exerted by the loading support mechanism on the lever is along the vertical direction.

Further, the weight mechanism includes a weight trolley, a weight loading mechanism, a weight series connection combination, a weight hanger and a third line contact mechanism, and the weight trolley includes a bottom plate, a top plate, and is installed on the bottom plate and The column between the top plates, the weight loading mechanism includes a moving pallet and a second lifting mechanism, the second lifting mechanism drives the moving pallet to move up and down along the column, and the weight hanger passes through the The third line contact mechanism is suspended from the long arm end of the lever. The series connection combination of weights includes a plurality of weights connected in series. Adjacent weights are connected in series through weight hanging nails. The upper end of the connection combination is hung on the weight hanger, and the mobile pallet is arranged below the weight series connection combination.

By adopting the above preferred solution, it is convenient to realize automatic and stable loading of weights.

Further, the weight trolley is placed on the platform of the ground scale to be verified, or the weight trolley is set on a support frame suspended horizontally above the platform of the ground scale.

Further, the third line contact mechanism includes a third blade seat, a third main blade, a third knife seat and a third main knife seat, the third blade seat is installed on the end of the long arm of the lever, and the first The three main blades are installed on the upper surface of the third blade seat, the edge of the third main blade faces upward, the third main blade is installed on the lower surface of the third blade seat, the third The main knife is in linear contact with the third main knife edge.

Using the above-mentioned preferred solution, the contact area between the weight hanger 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 force exerted by the weight on the lever is in the vertical downward direction.

Further, a lever locking mechanism is provided on the top plate of the weight trolley, and a locking block is installed on the long arm end of the lever. The lever locking mechanism includes a locking structure frame, a driving mechanism, and a locking wire. Rod, guide rod, upper moving plate, lower moving plate, upper pressing head and lower pressing head, the guide rod is installed vertically on the described locking frame, the upper half and the lower half of the locking screw rod The section has two sections of threads with opposite helical directions. The upper moving plate is sleeved on the guide rod and installed on the upper half of the locking screw through a threaded sleeve. The lower moving plate is sleeved on the guide rod and Installed on the lower half of the locking screw through a threaded sleeve, the upper pressing head is installed on the upper moving plate, the lower pressing head is installed on the lower moving plate, and the driving mechanism drives the lock The position screw rotates, and then drives the upper pressing head and the lower pressing head to move toward or away from each other, and the locking block is located in the middle position between the upper pressing head and the lower pressing head.

With the above preferred solution, during the weight loading process, the lever position is temporarily locked by the lever locking mechanism, and the lock is released after the weight loading is completed, so that the level of the lever can be adjusted more quickly.

A ground balance verification device includes at least one of the above-mentioned unequal arm balance loading units, and a control unit, and the control unit is connected to each unequal arm balance loading unit with signals.

By adopting the technical scheme of the present invention, the number of loading units to be deployed simultaneously is selected according to the total loading equivalent mass of a loading unit of an unequal arm balance and the maximum tonnage of the ground balance to be identified. The mass of the whole ground balance verification device is only equivalent to one-tenth or even a few tenths of the traditional weight verification method. Realize eccentric load test, ground balance strength test, etc.

A ground balance verification method, using k above-mentioned unequal arm balance loading units, wherein k≥1, in the unequal arm balance loading unit, the length of the moment arm at the end of the long arm of the lever is L ₁ , and the moment arm at the end of the short arm is The length is L ₂ , the mass of the lever is m ₀₁ , the mass of the loading support mechanism is m ₀₂ , and the magnification factor is n=L ₁ /L ₂ , including the following steps:

Install the loading units of each unequal arm balance respectively, place the loading support mechanism on the platform of the ground scale to be verified, install the tension balance mechanism on the base of the ground scale or the foundation foundation outside the ground scale, and install the first lifting mechanism on the ground scale to be verified. On the balance mechanism, the pulling balance mechanism is in a non-applying state to the lever, install the lever and adjust the lever to a horizontal balance state, and compare the difference between the ground balance reading Z ₀ and (m ₀₁ +m ₀₂ )*k;

A weight with a total mass of m ₁₀ is hung on the long arm end of the lever of the loading unit of the unequal arm balance of k platform, and the pulling balance mechanism applies tension to the short arm end of the lever, and the lever is adjusted to a horizontal balance state through the adjustment of the first lifting mechanism , the difference between the reading Z ₁ and m ₁₀ *(n+1) increased by comparison with the earth balance.

By adopting the above-mentioned technical scheme, by means of the magnification effect of the unequal arm balance lever, it is realized to realize the loading of large mass on the ground balance with small mass weights.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural representation of an embodiment of the present invention;

Fig. 2 is a schematic structural view of an unequal arm balance loading unit of the present invention;

Fig. 3 is a schematic diagram of the principle of an unequal arm balance;

Fig. 4 is a partial structural diagram of the loading support mechanism and the pulling balance mechanism;

Fig. 5 is a partial structural diagram of the weight mechanism;

Fig. 6 is a structural schematic diagram of a lever locking mechanism;

Fig. 7 is a partial structural diagram at the first line contact mechanism;

Fig. 8 is a partial structural diagram at the second line contact mechanism;

Fig. 9 is a partial structural diagram at the third line contact mechanism;

Fig. 10 is a schematic structural diagram of another embodiment of the present invention.

Names of corresponding parts indicated by numbers and letters in the figure:

100-loading unit; 110-lever; 1101-long arm end; 1102-short arm end; 1103-locking block; 120-weight mechanism; 121-weight trolley; 1211-bottom plate; 1212-top plate; ; 122-weight loading mechanism; 1221-moving pallet; 1222-second lifting mechanism; The third blade seat; 1252-the third main blade; 1253-the third knife riding seat; 1254-the third main knife riding; 130-loading support mechanism; 131-down loading seat; 134-the second line contact mechanism; 1341-the second blade seat; 1342-the second main blade; 1343-the second reinforcement block; 1344-the second knife seat; 1345-the second main knife rides; - pull balance frame; 142- upper pull plate; 143- the first line contact mechanism; 1431- the first blade seat; 1432- the first main blade; 1433- the first reinforcement block; The first main tool bearing; 144-rotating shaft seat; 145-pin shaft; 146-spherical joint mechanism; 147-guide sleeve; 150-first lifting mechanism; 160-lever locking mechanism; Mechanism; 1603-lock screw; 1604-guide rod; 1605-upper moving plate; 1606-lower moving plate; 1607-upper pressure head; 1608-lower pressure head;

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Figures 1 and 2, in one embodiment of the present invention, a loading unit 100 for an unequal arm balance includes:

a lever 110, which is divided by a fulcrum into a long arm end 1101 and a short arm end 1102;

Weight mechanism 120, the weight of the weight mechanism is loaded on the long arm end 1101 of the lever;

The loading support mechanism 130, the upper end of the loading support mechanism is supported at the fulcrum position of the lever 110, and the lower end of the loading support mechanism is pressed against the platform 201 of the ground scale to be verified;

Pull balance mechanism 140, the upper end of the pull balance mechanism acts on the short arm end 1102 of the lever, and the bottom of the pull balance mechanism is fixedly connected to the ground balance base 202 or the foundation foundation outside the ground balance;

A levelness detection mechanism, which is used to detect the levelness of the lever 110;

The first lifting mechanism 150 is installed on the pulling balance mechanism 140 , and the first lifting mechanism 150 is used to adjust the levelness of the lever 110 .

The schematic diagram of the principle of the unequal arm balance that the present invention adopts is shown in Fig. 3,

According to the principle of leverage,

n=L ₁ /L ₂ =F ₂ /F ₁ =m ₂ g/m ₁ g,

Among them, n is the magnification of the lever, L ₁ is the length of the moment arm at the end of the long arm, and L ₂ is the length of the moment arm at the end of the short arm;

F ₁ is the force generated by weight m ₁ , F ₁ = m ₁ g;

F ₂ is the force generated by the pulling balance mechanism, F ₂ =m ₂ g, m ₂ is the equivalent mass provided by F ₂ , m ₂ =n*m ₁ ;

Then the supporting force produced by the fulcrum on the lever is F=F ₁ +F ₂ , and F is equal to the downward force produced by the lever on the fulcrum. Since the gravitational acceleration g at the same place on the earth is exactly the same, that is, the equivalent mass exerted by the lever on the fulcrum m=m ₁ +m ₂ =(n+1)*m ₁ .

The beneficial effect of adopting the above-mentioned technical scheme is: a weight of a certain mass is applied to the long arm end of the lever, and the pulling balance mechanism applies a certain pulling force to the short arm end of the lever to maintain balance, and the loading support mechanism as the fulcrum of the lever uses the weight at the end of the long arm The mass and the equivalent mass of the pulling force applied by the short-arm end pulling balance mechanism are transferred to the ground scale platform; the lever is adjusted to a horizontal state through the first lifting mechanism and the levelness detection mechanism, and the equivalent mass of the short arm end is the weight of the long arm end The mass*lever magnification ratio is used to accurately obtain the mass value loaded on the scale platform. With the help of the amplification effect of the lever, the present invention only needs to use a loading unit with a mass of about one-tenth or even several tenths of the traditional weight verification method to complete the calibration and detection of the ground balance. The loading unit of the present invention takes up a lot of space Small, convenient for transportation and storage, can greatly improve the efficiency of geobalance verification and reduce the cost of verification.

It should be pointed out that, in the above-mentioned embodiment, the first lifting mechanism 150 is installed with the tension balance mechanism 140 . In another embodiment, the first elevating mechanism 150 can also be installed with the loading support mechanism 130 , that is, the first elevating mechanism 150 enables the loading and supporting mechanism 130 to have a lifting adjustment function to realize the level adjustment of the lever 110 .

In other embodiments of the present invention, the levelness detection mechanism adopts a high-precision displacement sensor or an angle sensor, the first lifting mechanism 150 adopts a worm gear and worm transmission mechanism and adopts a servo motor as a drive, and the control unit collects real-time data detected by the levelness detection mechanism. The level signal is adjusted by the servo motor, and the position of the closed-loop control lever is kept level.

As shown in FIG. 4 , in other embodiments of the present invention, the pull balance mechanism 140 includes a pull balance frame 141, an upper pull plate 142 and a first line contact mechanism 143, and the pull balance frame 141 is fixedly connected to the floor balance base or On the foundation foundation outside the scale, the first lifting mechanism 150 is installed between the pull balance frame 141 and the upper pull plate 142, and the upper pull plate 142 is connected with the short arm end 1102 of the lever through the first line contact mechanism 143, the first line The contact line of the contact mechanism 143 is horizontal and perpendicular to the length direction of the lever 110 . Among them, the connection between the tension balance frame and the base of the scale body or the foundation of the scale body must be stable and able to bear the force generated during loading. There are three connection methods: one is to pre-install bolts on the steel structure beam of the base of the scale body , the lower end base of the tension balance frame is firmly connected with the base of the scale body through bolts and nuts; the second is to set multiple fixing devices on the concrete foundation of the scale, such as setting stainless steel chemical bolts in the concrete that are level with its plane, each The first stainless steel chemical bolt is provided with a threaded hole, and the bolt is installed through the threaded hole to fix the pull balance device; the third is to fix the flat steel plate on the steel beam of the floor balance base or on the concrete foundation, and then pull the pull balance device through the magnetic force of the powerful permanent magnet. The base of the balance mechanism is fixed by adsorption. The beneficial effect of adopting the above technical solution is that the first lifting mechanism is arranged on the tension balance frame fixed on the firm base, which improves the structural stability.

As shown in FIG. 4 , in other embodiments of the present invention, a rotating shaft seat 144 is also included, and the rotating shaft seat 144 is installed on the pulling balance frame 141 , and a pin shaft is passed between the rotating shaft seat 144 and the base of the first lifting mechanism 150 145 connection, the axial direction of the pin shaft 145 is horizontal and perpendicular to the length direction of the lever, and the telescopic shaft of the first lifting mechanism 150 is connected with the upper pull plate 142 through the spherical joint mechanism 146 . The beneficial effect of adopting the above-mentioned technical solution is: ensuring that the pulling balance frame generates a pulling force that is perpendicular to the lever.

As shown in Figure 4, in other embodiments of the present invention, the loading support mechanism 130 includes a lower loading seat 131, a guide post 132, an upper loading seat 133 and a second line contact mechanism 134, and rollers are installed under the lower loading seat 131, The rollers press against the platform to be verified, and the guide post 132 is vertically connected between the lower loading seat 131 and the upper loading seat 133 , and the upper loading seat 133 is connected to the lever 110 through the second line contact mechanism 134 . The beneficial effect of adopting the above technical solution is: the contact between the loading support mechanism and the platform of the ground balance adopts a roller mechanism, and the loading support mechanism and the platform of the ground balance can freely roll in the horizontal direction, without changing the degree of freedom of the horizontal plane of the ground balance, and improving the accuracy of readings .

As shown in FIG. 4 , in other embodiments of the present invention, a guide sleeve 147 is provided 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 the above technical solution is that the position between the tension balance mechanism and the loading support mechanism can be kept stable, and the support force and the tension balance force can be kept vertically parallel.

In some other embodiments of the present invention, the guide sleeve has a two-half structure, and also includes a driving mechanism for controlling the opening and closing of the guide sleeve. The beneficial effect of adopting the above-mentioned technical solution is: during the leveling process of the lever, the guide sleeve cooperates with the guide post 132 to ensure that the position of the loading support mechanism remains stable; after the level adjustment is completed, the guide sleeve and the guide post 132 are released to ensure that the weight The equivalent mass of mass and pull balance is completely released on the floor scale platform, improving the accuracy of loading mass.

As shown in Figure 5, in other embodiments of the present invention, the weight mechanism 120 includes a weight trolley 121, a weight loading mechanism 122, a weight series connection combination 123, a weight hanger 124 and a third line contact mechanism 125 The weight trolley 121 includes a base plate 1211, a top plate 1212, and a column 1213 installed between the base plate 1211 and the top plate 1212. The weight loading mechanism 122 includes a mobile pallet 1221 and a second lifting mechanism 1222. The second lifting mechanism 1222 drives the mobile pallet. The plate 1221 moves up and down along the column 1213, and the weight hanger 124 is suspended from the long arm end 1101 of the lever through the third line contact mechanism 125. The upper end of the weight series connection combination 123 is hung under the weight hanger 124, and the mobile pallet 1221 is set under the weight series connection combination 123, which is used to support the weights in turn when rising . The beneficial effect of adopting the above-mentioned technical solution is that it is convenient to realize automatic and stable loading of weights.

In some other embodiments of the present invention, the weight trolley is arranged on a support frame suspended horizontally above the platform of the ground scale, and the two ends of the support frame are respectively connected to the foundation frames on both sides of the ground scale. In this way, every time a weight of a certain weight is loaded on the end of the long arm of the lever, the mass increment obtained on the platform of the floor scale is the sum of the mass of the weight and the equivalent mass generated by the tension balance mechanism at the short arm end of the lever, that is, the mass increment is Load weight mass * (lever magnification ratio + 1).

In other embodiments of the present invention, the weight trolley 121 is placed on the platform of the ground scale to be verified, so that when the ground scale is initially verified, the total mass of the weight mechanism is also added to the total mass of the initial load. And every time a certain weight is loaded on the end of the lever's long arm, the mass of the weight on the weight trolley decreases accordingly, but all the weights are always finally loaded on the floor scale, and the mass obtained on the floor at this time The increment is only the equivalent mass generated by the balance mechanism at the short arm end of the lever, that is, the mass increment is only the mass of the loaded weight * the magnification ratio of the lever.

As shown in Figures 7-9, in other embodiments of the present invention, in order to ensure that the gravity of the weight on the lever, the pulling force of the pulling balance mechanism on the lever and the supporting force of the loading support mechanism on the lever can all be aligned along the vertical direction. , to prevent force components in other directions from affecting the accuracy of the final mass loaded on the floor scale. The first line contact mechanism 143 includes a first blade seat 1431, a first main blade 1432, a first reinforcement block 1433, a first knife seat 1434 and a first main knife seat 1435, and the middle section of the first blade seat 1431 is installed on the lever 110 In the through hole of the first blade seat 1431, the two ends of the lever exposed on the first blade seat 1431 are respectively equipped with the first main blade 1432, the edge of the first main blade 1432 faces upward, and the first reinforcement block 1433 is fixed on the two sides of the lever, and the first Reinforcing block 1433 leans against the bottom of first blade seat 1431, first knife seat 1434 is fixedly connected with upper pull plate 142, first main knife seat 1435 is installed on the lower surface of first knife seat 1434, first main knife seat 1435 is connected with The first main cutting edge 1432 is in linear contact. The second line contact mechanism 134 includes a second blade seat 1341, a second main blade 1342, a second reinforcement block 1343, a second knife seat 1344 and a second main knife seat 1345, and the middle section of the second blade seat 1341 is installed on the lever 110. In the through hole, the two ends of the exposed lever on the second blade seat 1341 are installed with the second main blade 1342 respectively, the edge portion of the second main blade 1342 faces downward, and the second reinforcement block 1343 is fixed on the both sides of the lever, and the second reinforcement The block 1343 leans against the top of the second blade seat 1341, the second knife seat 1344 is fixedly installed with the upper loading seat 133, the second main knife is mounted on the second knife seat 1344 by 1345, and the second main knife is mounted on the second knife seat 1344 by 1345. The two main blades 1342 are in linear contact. The third line contact mechanism 125 includes a third blade seat 1251, a third main blade 1252, a third knife riding seat 1253 and a third main knife multiplying 1254, the third blade seat 1251 is installed on the lever long arm end 1101, and the third main blade 1252 Installed on the upper surface of the third blade seat 1251, the edge portion of the third main blade 1252 faces upwards, the third main knife multiplies 1254 and is installed on the lower surface of the third knife seat 1253, the third main knife multiplies 1254 and the third main blade 1252 linear contact. It can be clearly seen from the diagram that the first main blade 1432, the second main blade 1342, and the third main blade 1252 all have V-shaped sharp corners with small angles on the cross section. 1. The third main knife bearing 1254 has a large-angle V-shaped groove, so that the main knife edge has a degree of freedom of swing in the main knife bearing. In particular, the first main blade 1432, the second main blade 1342, and the third main blade 1252 are all fixedly mounted on the lever 110 to ensure that the force acting point and the position of the fulcrum remain stable, and it is convenient to configure the length of the long arm and the short force with high precision. The arm length is used to accurately calculate the equivalent mass loaded on the floor of the scale, and the loading accuracy of the loading unit is better than 0.01%.

As shown in Figure 6, in other embodiments of the present invention, a lever locking mechanism 160 is provided on the top plate of the weight trolley 121, and a locking block 1103 is installed at the long arm end of the lever. The lever locking mechanism 160 includes Lock structure frame 1601, driving mechanism 1602, lock screw 1603, guide rod 1604, upper moving plate 1605, lower moving plate 1606, upper pressing head 1607 and lower pressing head 1608, guide rod 1604 is vertically installed in the locking structure On the frame 1601, the upper half and the lower half of the lock screw 1603 have two sections of threads with opposite helical directions, and the upper moving plate 1605 is sleeved on the guide rod 1604 and installed on the upper half of the lock screw 1603 through a thread sleeve. Section, the lower moving plate 1606 is sleeved on the guide rod 1604 and installed on the lower half of the locking screw 1603 through a threaded sleeve, the upper pressing head 1607 is installed on the upper moving plate 1605, and the lower pressing head 1608 is installed on the lower moving plate 1606 , the driving mechanism 1602 drives the locking screw 1603 to rotate, and then drives the upper pressing head 1607 and the lower pressing head 1608 to move toward or away from each other, and the locking block 1103 is located in the middle position between the upper pressing head 1607 and the lower pressing head 1608 . The beneficial effect of adopting the above technical solution is: during the weight loading process, the lever position is temporarily locked by the lever locking mechanism, and the lock is released after the weight loading is completed, so that the level of the lever can be adjusted more quickly.

As shown in Figure 10, in another embodiment of the present invention, a kind of ground balance verification device includes a plurality of unequal arm balance loading units 100, and a control unit, and the control unit is connected with each unequal arm balance The loading unit 100 is signal connected. According to the total loading equivalent mass of a unequal arm balance loading unit and the maximum tonnage of the ground balance to be identified, select the number of loading units that need to be deployed simultaneously. For example, the equivalent mass loaded by one loading unit is 10 tons. To verify truck scales of 20 tons, 50 tons, 80 tons, 100 tons, and 200 tons, 2, 5, 8, and 10 truck scales can be deployed at the same time as required. , 20 loading units. For the loading unit with a lever magnification ratio of 10, the mass of each loading unit is only about 1 ton, which is equivalent to 1/10 of the equivalent mass of 10 tons that it can load, so the mass of the whole ground balance verification device is only 1 ton. Equivalent to one tenth of the traditional weight verification method, it can realize the full-scale multi-point calibration detection of the ground balance, and can realize the partial load test, the ground balance strength test, etc.

A ground balance verification method, using k unequal arm balance loading units, wherein k≥1, in the unequal arm balance loading unit, the length of the moment arm at the end of the long arm of the lever is L ₁ , and the length of the moment arm at the end of the short arm is is L ₂ , the mass of the lever is m ₀₁ , the mass of the loading support mechanism is m ₀₂ , and the magnification factor is n=L ₁ /L ₂ , including the following steps:

Step 1, install the loading units of each unequal arm balance respectively, place the loading support mechanism on the platform of the ground scale to be verified, install the pulling balance mechanism on the base of the ground scale or the foundation foundation outside the ground scale, and the first lifting mechanism Installed on the pulling balance mechanism. At the beginning, the pulling balance mechanism is in a state of non-applying force to the lever. Install the lever and adjust the lever to a horizontal balance state. At this time, the actual loading mass on the ground balance is k levers and k levers The quality of the support mechanism (ie (m ₀₁ +m ₀₂ )*k), read the ground balance indication Z ₀ , and compare the difference between the ground balance reading Z ₀ and (m ₀₁ +m ₀₂ )*k;

Step 2: Hang a weight with a total mass of m ₁₀ on the long arm end of the lever of the loading unit of the unequal arm balance of k platform, apply a pulling force to the short arm end of the lever by the pulling balance mechanism, and adjust the lever to In the state of horizontal balance, at this time, compared with step 1, the actual mass added on the ground scale is m ₁₀ *(n+1), and then the calculation of the ground scale shows the newly added mass reading Z ₁ , compared with the increased reading of the ground scale The difference between Z ₁ and m ₁₀ *(n+1) can determine whether the measurement accuracy of the ground balance meets the requirements.

By adopting the above-mentioned technical scheme, by means of the magnification effect of the unequal arm balance lever, it is realized to realize the loading of large mass on the ground balance with small mass weights.

The above-described embodiments are only to illustrate the technical concept and characteristics of the present invention, and its purpose is to allow those of ordinary skill in the art to understand the content of the present invention and implement it, and cannot limit the protection scope of the present invention with this. All equivalent changes or modifications should fall within the protection scope of the present invention.

Claims (11)

1. A loading unit for an unequal arm balance, characterized in that it comprises:

   a lever, which is divided by a fulcrum into a long arm end and a short arm end;

   a weight mechanism, the weight of the weight mechanism is loaded on the long arm end of the lever;

   A loading support mechanism, 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 against the ground scale platform to be verified;

   Pull balance mechanism, 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 the base of the ground balance or the foundation foundation outside the ground balance;

   A levelness detection mechanism, which is used to detect the levelness of the lever;

   The first lifting mechanism is installed on the loading support mechanism or the pulling balance mechanism, and the first lifting mechanism is used for adjusting the levelness of the lever.
2. The unequal arm balance loading unit according to claim 1, wherein the pulling balance mechanism includes a pulling balance frame, an upper pull plate and a first line contact mechanism, and the pulling balance frame is fixedly connected to the ground balance base Or on the foundation outside the ground balance, the first lifting mechanism is installed between the pull balance frame and the upper pull plate, and the upper pull plate is connected to the short arm end of the lever through the first line contact mechanism connected, the contact line of the first line contact mechanism is horizontal and 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, the rotating shaft seat is installed on the pulling balance frame, and the rotating shaft seat is connected to the base of the first lifting mechanism They are connected by a pin shaft, the axial 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.
4. The unequal arm balance loading unit according to claim 2, wherein 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, the middle section of the first blade seat is installed in the through hole of the lever, and the two ends of the exposed lever on the first blade seat are respectively installed with the first main blade, and the edge of the first main blade faces On the top, the first reinforcement block is fixed on both sides of the lever, and the first reinforcement block abuts against the bottom of the first blade seat, and the first blade seat is fixed to the upper pull plate connected, the first main blade holder is installed on the lower surface of the first blade holder, and the first main blade holder is in linear contact with the first main blade.
5. The unequal arm balance loading unit according to claim 2, wherein the loading support mechanism comprises a lower loading seat, a guide column, an upper loading seat and a second line contact mechanism, and rollers are installed under the lower loading seat, The rollers are pressed against the ground scale platform to be verified, the guide post is connected between the lower loading base and the upper loading base, and the upper loading base is connected to the lever through the second line contact mechanism.
6. The unequal arm balance loading unit according to claim 5, wherein the second line contact mechanism comprises a second blade seat, a second main blade, a second reinforcing block, a second knife seat and a second main knife , the middle section of the second blade seat is installed in the through hole of the lever, the two ends of the exposed lever on the second blade seat are respectively installed with second main blades, and the edge of the second main blade faces downward , the second reinforcement block is fixed on both sides of the lever, and the second reinforcement block is against the top of the second blade seat, and the second knife seat and the upper loading seat are fixedly installed , the second main knife multiplier is installed on the upper surface of the second knife seat, and the second main knife multiplier is in linear contact with the second main knife edge.
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 The weight trolley includes a bottom plate, a top plate and a column installed between the bottom plate and the top plate, the weight loading mechanism includes a moving pallet and a second lifting mechanism, and the second lifting mechanism drives the moving pallet along the The column moves up and down, and the weight hanger is suspended from the long arm end of the lever through the third line contact mechanism. The series connection combination of weights includes a plurality of weights connected in series. The weights are connected in series through weight hanging nails, the upper end of the weight series connection combination is hung on the weight hanger, and the mobile pallet is arranged below the weight series connection combination.
8. The unequal arm balance loading unit according to claim 7, wherein the third line contact mechanism includes a third blade seat, a third main blade, a third knife seat and a third main knife seat, and the third The knife edge seat is installed on the long arm end of the lever, the third main knife edge is installed on the upper surface of the third knife edge seat, the edge of the third main knife edge faces upward, and the third main knife is mounted on the The third knife rides on the lower surface of the seat, and the third main knife is in linear contact with the third main knife edge.
9. The unequal arm balance loading unit according to claim 7, wherein a lever locking mechanism is arranged on the top plate of the weight trolley, and a locking block is installed on the long arm end of the lever, and the lever The locking mechanism includes 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, and the guiding rod is vertically installed on the locking structure frame Above, the upper half and the lower half of the locking screw have two sections of threads with opposite helical directions, and the upper moving plate is sleeved on the guide rod and installed on the upper half of the locking screw through a threaded sleeve. section, the lower moving plate is sleeved on the guide rod and installed on the lower half of the locking screw through a threaded sleeve, the upper pressing head is installed on the upper moving plate, and the lower pressing head is installed on the On the lower moving plate, the driving mechanism drives the locking screw to rotate, and then drives the upper and lower pressing heads to move toward or away from each other, and the locking block is located on the upper and lower pressing heads. middle position between.
10. A ground balance verification device, characterized in that it includes at least one unequal arm balance loading unit as claimed in any one of claims 1-9, and a control unit, the control unit is connected to each of the unequal arms Balance loading unit signal connection.
11. A ground balance verification method, characterized in that, using k units of the unequal arm balance loading unit as claimed in claim 1, wherein k≥1, in the unequal arm balance loading unit, the moment arm at the long arm end of the lever The length is L ₁ , the length of the moment arm at the short arm end is L ₂ , the mass of the lever is m ₀₁ , the mass of the loading support mechanism is m ₀₂ , and the magnification factor is n=L ₁ /L ₂ , including the following steps:

    Install the loading units of each unequal arm balance respectively, place the loading support mechanism on the platform of the ground scale to be verified, install the tension balance mechanism on the base of the ground scale or the foundation foundation outside the ground scale, and install the first lifting mechanism on the ground scale to be verified. On the balance mechanism, the pulling balance mechanism is in a non-applying state to the lever, install the lever and adjust the lever to a horizontal balance state, and compare the difference between the ground balance reading Z ₀ and (m ₀₁ +m ₀₂ )*k;

    A weight with a total mass of m ₁₀ is hung on the long arm end of the lever of the loading unit of the unequal arm balance of k platform, and the pulling balance mechanism applies tension to the short arm end of the lever, and the lever is adjusted to a horizontal balance state through the adjustment of the first lifting mechanism , the difference between the reading Z ₁ and m ₁₀ *(n+1) increased by comparison with the earth balance.

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