CN110763322A - Combined type calibrating device of electronic hanging scale - Google Patents
Combined type calibrating device of electronic hanging scale Download PDFInfo
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- CN110763322A CN110763322A CN201910994366.8A CN201910994366A CN110763322A CN 110763322 A CN110763322 A CN 110763322A CN 201910994366 A CN201910994366 A CN 201910994366A CN 110763322 A CN110763322 A CN 110763322A
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- hanging scale
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
Abstract
The invention provides a combined type calibrating device of an electronic hanging scale, which relates to the technical field of calibrating of measuring instruments and comprises a rack, a movable beam, a superposition mechanism, an automatic loading and unloading mechanism of the electronic hanging scale and a dead weight mechanism, wherein the rack is provided with a top connecting plate, a middle supporting plate and a bottom plate; the stacking mechanism comprises a test pressing plate, a pressing head, a standard sensor, an oil cylinder and a stacking pull rod; the automatic loading and unloading mechanism of the electronic hanging scale comprises an upper pull head, an adapter, a movable seat and a cantilever bracket; the dead weight mechanism comprises a lower pull head, a ball head pull rod, a ball head seat, a weight connecting piece and a weight component. The invention has the following advantages: the developed combined type calibrating device of the electronic hanging scale meets the full-range and full-performance calibration of the electronic hanging scale, solves the major problems that the large-tonnage electronic hanging scale cannot be detected and is inaccurate in the calibration of the conventional weight, and has high intelligent degree, high efficiency and strong safety; the automatic loading and unloading mechanism of the hanging scale is arranged, so that full-automatic installation and automatic positioning are realized.
Description
Technical Field
The invention relates to the technical field of measuring instrument verification, in particular to a combined verification device of an electronic hanging scale.
Background
An electronic hanging scale is a measuring instrument for weighing a weighed object on line in a suspended state. At present, a large number of electronic hanging scales are widely applied to weighing in various industries such as transportation, aviation, energy, metallurgy and the like all over the country, along with the development of the industry, the measuring range of the electronic hanging scales is continuously expanded, and whether the electronic hanging scales are accurate or not relates to trade fairness, safety protection and product quality control. In order to ensure the accuracy of the metering performance, the electronic scale needs to be periodically verified or calibrated, so that the verification device and the verification method have a crucial role in determining the accuracy of the electronic scale.
According to the data query, the verification or calibration of the current electronic hanging scale is performed according to the national metrological verification rule JJJG 539-:
firstly, the crane scale is used on site, and standard weights are adopted for on-site verification. The method can meet the requirements of small-scale verification (such as 500kg and 1t), but cannot meet the requirements of large-scale electronic hanging scales (such as 30/50/80/100 tons). There are mainly the following problems: 1. when the standard weight is checked, the standard weight does not have enough space to be hung; 2. the bearing capacity of the hoisting device on the verification site is limited; 3. the safety of the verification site is poor, and the working efficiency is low; 4. the transportation capacity of the weight is large and the cost is high; 5. the full-range and full-performance verification of the electronic hanging scale cannot be realized.
And secondly, adopting a force standard device for verification. The existing superposition type or dead-weight type force standard device is adopted for verification, and the following problems exist: 1. the large-range electronic hanging scale is difficult to install and poor in safety. According to survey data, the large-range hanging scale produced by the current manufacturer has large volume and heavy weight, and the electronic hanging scale weighing 100 tons produced by the individual manufacturer has the weight of about 1 ton. Therefore, the verification personnel are difficult to convey the hanging scale to the designated position in a manual or mechanical mode, and potential safety hazards exist during installation; 2. whether the force standard device is a superposition type or dead weight type force standard device, the testing space is insufficient when the large-range electronic hanging scale is verified, and the requirement of the large-range electronic hanging scale testing space cannot be met; 3. the calibration cannot be carried out according to the regulations when the stacked standard machine is adopted for calibration, and the existing stacked force standard machine cannot meet the calibration requirements that the electronic hanging scale is 10e and 20e (e is a calibration division value) in minimum weight because the force value control range is limited according to the requirements of calibrating the electronic hanging scale in JJG 539-. 4. The dead weight type force standard machine is adopted for verification, the verification efficiency is low, the verification requirements of the lower limit of the measuring range and the identification threshold cannot be met, and meanwhile, the dead weight type force standard machine is high in manufacturing cost, particularly large in measuring range and particularly high in cost.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a combined type calibrating device of an electronic hanging scale, which is designed by combining the principle of a superposed type force standard device and the advantages of the principle of a dead weight type force standard device, and the combined type standard device with a superposed structure and a dead weight loading mechanism is designed, so that the electronic hanging scale can carry out full-range and full-performance calibration according to regulations.
The invention is realized by the following steps: a combined type calibrating device of an electronic hanging scale comprises a rack, a movable cross beam, a stacking mechanism, an electronic hanging scale automatic loading and unloading mechanism and a dead weight mechanism, wherein the rack is provided with a top connecting plate, a middle supporting plate and a bottom plate, and the movable cross beam is connected to the rack in an up-and-down sliding manner and is positioned between the top connecting plate and the middle supporting plate;
the stacking mechanism comprises a test pressing plate, a pressing head, a standard sensor, an oil cylinder and a stacking pull rod, wherein a cylinder body of the oil cylinder is fixedly connected with the movable cross beam, a base plate is fixedly arranged on a piston of the oil cylinder and is positioned above the movable cross beam, the standard sensor is fixedly arranged on the base plate, the pressing head is fixedly connected with the test pressing plate, the pressing head props against the standard sensor, the stacking pull rod penetrates through center holes of the oil cylinder and the base plate and is in sliding connection with the center holes, and one end of the stacking pull rod is fixedly connected with the test pressing plate;
the automatic loading and unloading mechanism of the electronic hanging scale comprises an upper pull head, an adapter, a moving seat and a cantilever support, wherein the cantilever support is fixedly connected with the moving beam, the moving seat is slidably connected with the cantilever support, the moving seat is positioned below the moving beam, the adapter is provided with a convex part, the adapter is slidably connected with the moving seat up and down, the convex part can clamp the moving seat, the adapter is also fixedly connected with the upper pull head, the adapter is provided with a groove, and the other end of the superposed pull rod is in matched connection with the groove;
the dead weight mechanism comprises a lower pull head, a ball head pull rod, a ball head seat, a weight connecting piece and a weight component, wherein the lower pull head is positioned above the middle supporting plate, the ball head seat is fixedly arranged on the middle supporting plate, the ball head pull rod penetrates through the ball head seat and is in sliding connection with the middle supporting plate, one end of the ball head pull rod is fixedly connected with the lower pull head, the other end of the ball head pull rod is fixedly connected with one end of the weight connecting piece, and the other end of the weight connecting piece is connected with the weight component in a dismounting manner.
Further, the movable cross beam device further comprises a cross beam driving mechanism, the cross beam driving mechanism comprises a first lead screw and a first servo motor, the top end of the first lead screw is rotatably connected with the top connecting plate, the bottom end of the first lead screw is rotatably connected with the middle supporting plate, the first lead screw is further in threaded connection with the movable cross beam, the machine body of the first servo motor is fixedly connected with the top connecting plate, and the output shaft of the first servo motor is in transmission connection with the top end of the first lead screw.
Furthermore, the beam driving mechanism further comprises a guide post, the guide post is fixedly arranged between the top connecting plate and the middle supporting plate, and the movable beam is connected with the guide post in a sliding manner.
Further, the stacking mechanism further comprises a force equalizing plate, the standard sensors are provided with a plurality of pressure heads and are fixedly arranged along the circumferential direction of the substrate, the number of the pressure heads corresponds to that of the standard sensors, and each pressure head is fixedly connected with the force equalizing plate.
Furthermore, the automatic loading and unloading mechanism of the electronic hanging scale further comprises two second lead screws, a second servo motor and bearing seats, wherein the two bearing seats are fixedly arranged at two ends of the cantilever support respectively, two ends of the second lead screw are rotatably connected with the bearing seats respectively, the second lead screw penetrates through the movable seat and is in threaded connection with the movable seat, a machine body of the second servo motor is fixedly connected with one of the bearing seats, and an output shaft of the second servo motor is in transmission connection with the second lead screw.
Furthermore, the automatic loading and unloading mechanism of the electronic hanging scale further comprises a first linear guide rail and a second linear slide block, the first linear guide rail is fixedly connected with the cantilever support, the first linear slide block is fixedly connected with the movable base, and the first linear slide block is connected with the first linear guide rail in a sliding manner.
The weight lifting driving mechanism comprises a weight lifting plate, a third lead screw and a third servo motor, the top end of the third lead screw is rotatably connected with the middle supporting plate, the bottom end of the third lead screw is rotatably connected with the bottom plate, the third lead screw is further in threaded connection with the weight lifting plate, the machine body of the third servo motor is fixedly connected with the bottom plate, and the output shaft of the third servo motor is in transmission connection with the bottom end of the third lead screw;
the weight assembly includes weight connecting seat, weight adapter sleeve, weight connecting axle, sets up the weight body of hole, the weight body has a plurality ofly, is in the weight body and the weight connecting seat fixed connection at top, weight connecting seat joint in the lower extreme of weight connecting piece is provided with between two adjacent weight bodies about the weight connecting axle and weight adapter sleeve, the upper end embedding of weight connecting axle in the hole of the weight body of top, the lower extreme of weight connecting axle with the weight adapter sleeve passes through screw thread fixed connection, the weight adapter sleeve still with the below the hole fixed connection of the weight body, the weight body that is in the bottom place in the upper surface of weight lifter plate.
Further, still include weight conveying mechanism, weight conveying mechanism includes weight movable plate, second linear guide, second straight line slider and guide rail support column, second straight line guide fixed connection in the upper surface of weight lifter plate, second straight line guide still with guide rail support column fixed connection, second straight line slider fixed connection in the lower surface of weight movable plate, second straight line slider sliding connection in second straight line guide, the weight body that is in the bottom place in the upper surface of weight movable plate.
Further, the weight conveying mechanism further comprises a weight positioning seat, the bottom end of the weight positioning seat is fixedly connected to the weight moving plate, and the top end of the weight positioning seat can be inserted into the inner hole of the weight body at the bottom.
Further, still including distinguishing threshold accredited testing organization, it includes leading truck, fourth lead screw, test walking beam and force sensor to distinguish threshold accredited testing organization, leading truck fixed connection in the lower surface of intermediate junction board, sliding connection about the test walking beam in the leading truck, the both ends of fourth lead screw with the leading truck rotates to be connected, the fourth lead screw still with test walking beam threaded connection, force sensor with test walking beam fixed connection, the weight connecting piece passes force sensor and sliding connection, the weight connecting piece has the fender ring, it is located to keep off the ring the below of force sensor.
The invention has the following advantages: 1. the combined type verification device for the electronic hanging scale can realize full-range and full-performance verification of the electronic hanging scale according to the rule JJJG 539-;
2. the device combines the dual advantages of the superposition structure and the dead weight structure, namely, the superposition structure has the advantages of high loading speed, good stability, high range upper limit and low cost, the dead weight structure has high accuracy and stable force value loading and unloading, and the problem that the range lower limit of the electronic hanging scale cannot be detected can be solved.
3. The device is provided with a crane scale automatic loading and unloading mechanism, so that the problems of poor safety, high working strength and the like of manual installation during crane scale installation can be solved, and full-automatic installation and automatic positioning are realized;
4. the device is provided with a threshold identification testing mechanism, so that the requirement of threshold identification testing can be met, and the problems of large workload and high error rate when small weights are added manually are solved.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic perspective view of the structure of the combined type calibrating device of the electronic hanging scale of the invention.
Fig. 2 is a schematic plan view of the structure of the combined type verification device of the electronic hanging scale of the invention.
Fig. 3 is a partially enlarged view of a in fig. 2.
FIG. 4 is a schematic perspective view showing the positional relationship of the movable beam, the stacking mechanism and the automatic loading/unloading mechanism of the electronic hanging scale according to the present invention.
Fig. 5 is an assembly view of the stacking tie bar, the movable base and the adapter according to the present invention.
FIG. 6 is a schematic front view of the structure of the automatic loading and unloading mechanism of the electronic hanging scale of the present invention.
Fig. 6a is a right side view of fig. 6.
Fig. 6b is a top view of fig. 6.
FIG. 7 is a schematic plan view of the assembly of the moving beam, stacking mechanism and electronic crane scale robot assembly and disassembly mechanisms of the present invention.
FIG. 7a is a schematic sectional view taken along line B-B of FIG. 7.
FIG. 8 is an assembly diagram of the oil cylinder, the standard sensor, the pressure head and the force equalizing plate in the invention.
Fig. 9 is a schematic view of the loading state of the weight assembly of the present invention.
Fig. 9a is a schematic cross-sectional view taken along line C-C of fig. 9.
Fig. 10 is a schematic view of the unloaded state of the weight assembly of the present invention.
Fig. 10a is a schematic sectional view taken along line D-D of fig. 10.
FIG. 11 is an assembly view of the lower slider, the ball-end pull rod, the intermediate support plate and the weight connecting member according to the present invention.
Fig. 12 is a schematic perspective view of the structure of the weight conveying mechanism according to the present invention.
Fig. 13 is a schematic plan view of the structure of the weight conveying mechanism of the present invention.
The labels in the figure are: the device comprises a frame 1, a top connecting plate 11, an intermediate supporting plate 12, a bottom plate 13, an upper column 14, a lower column 15, a movable beam 2, a superposition mechanism 3, a test pressing plate 31, a pressure head 32, a standard sensor 33, an oil cylinder 34, a piston 341, a superposition pull rod 35, a base plate 36, a force-equalizing plate 37, an electronic hanging scale automatic loading and unloading mechanism 4, an upper pull head 41, an adapter 42, a convex part 421, a profiled groove 422, a movable seat 43, a cantilever support 44, a second screw rod 45, a second servo motor 46, a bearing seat 47, a first linear guide rail 48, a second linear slide block 49, a dead weight mechanism 5, a lower pull head 51, a ball head pull rod 52, a ball seat 53, a weight connector 54, a retaining ring 541, a weight assembly 55, a weight connecting seat 551, a connecting sleeve 552, a weight connecting shaft 552, a weight body 554, an inner hole 5541, a beam driving mechanism 6, a first screw rod 61, the device comprises a commutator 64, a speed reducer 65, a guide post 66, a weight lifting driving mechanism 7, a weight lifting plate 71, a third screw rod 72, a third servo motor 73, a weight conveying mechanism 8, a weight moving plate 81, a handle 811, a second linear guide rail 82, a second linear slide block 83, a guide rail support 84, a weight positioning seat 85, a discrimination threshold testing mechanism 9, a guide frame 91, a guide rod 911, a fourth screw rod 92, a testing moving beam 93 and a force sensor 94.
Detailed Description
Referring to fig. 1 to 13, a preferred embodiment of the combined verification device of the electronic hanging scale of the present invention; the device comprises a rack 1, a movable beam 2, a superposition mechanism 3, an electronic hanging scale automatic loading and unloading mechanism 4, a dead weight mechanism 5, a beam driving mechanism 6, a weight lifting driving mechanism 7, a weight conveying mechanism 8 and an identification threshold testing mechanism 9; the frame 1 is provided with a top connecting plate 11, a middle supporting plate 12 and a bottom plate 13, and the movable beam 2 is connected to the frame 1 in a vertical sliding manner and is positioned between the top connecting plate 11 and the middle supporting plate 12; the frame 1 further has a plurality of upper columns 14 and lower columns 15, two ends of the upper columns 14 are respectively connected with the top connecting plate 11 and the middle support plate 12 through nuts in a locking manner, and two ends of the lower columns 15 are respectively connected with the middle support plate 12 and the bottom plate 13 through nuts in a locking and fixing manner.
The beam driving mechanism 6 comprises a first screw rod 61 and a first servo motor 62, the top end of the first screw rod 61 is rotatably connected with the top connecting plate 11, the bottom end of the first screw rod 61 is rotatably connected with the middle supporting plate 12, and two ends of the first screw rod 61 are matched with bearings to rotate; the first screw rod 61 is also in threaded connection with the movable beam 2, so that when the first screw rod 61 rotates forwards or reversely, the movable beam 2 can move up and down; the body of the first servo motor 62 is fixedly connected with the top connecting plate 11, and the output shaft of the first servo motor 62 is in transmission connection with the top end of the first screw rod 61. More specifically, the beam driving mechanism 6 further includes a quincunx coupler 63, a commutator 64 and a speed reducer 65, an output shaft of the first servo motor 62 is connected with the commutator 64 through the quincunx coupler 63, the commutator 64 converts the rotation direction of the first servo motor 62 into a rotation direction required for outputting, so as to drive the speed reducer 65 connected with the commutator 64, and the speed reducer 65 converts the rotation speed of the first servo motor 62 into a specific rotation speed required by a certain reduction ratio, so as to drive the first lead screw 61 connected with the first lead screw, and further to rotate the lead screw. The beam driving mechanism 6 further comprises a guide post 66, the guide post 66 is fixedly arranged between the top connecting plate 11 and the middle support plate 12, and the movable beam 2 is slidably connected with the guide post 66. The guide posts 66 stabilize the moving beam 2 sliding up and down. Please refer to fig. 1 and fig. 2 again for the positions of the guiding column 66 and the first lead screw 61.
Referring to fig. 4, 5, 7 to 8, the stacking mechanism 3 includes a testing platen 31, a pressure head 32, a standard sensor 33, an oil cylinder 34 and a stacking pull rod 35, a cylinder body of the oil cylinder 34 is fixedly connected to the movable cross beam 2, a base plate 36 is fixedly disposed on a piston 341 of the oil cylinder 34, the base plate 36 is located above the movable cross beam 2, the standard sensor 33 is fixedly disposed on the base plate 36, the pressure head 32 is fixedly connected to the testing platen 31, the pressure head 32 abuts against the standard sensor 33, the stacking pull rod 35 penetrates through center holes of the oil cylinder 34 and the base plate 36 and is slidably connected to the central holes, and one end of the stacking pull rod 35 is fixedly connected to the testing platen 31; the superposition mechanism 3 is used for providing a device of a superposition force source when the electronic hanging scale is checked. During verification, the piston 341 of the oil cylinder 34 moves upwards to drive the standard sensor 33, the pressure head 32 and the test pressure plate 31 on the base plate 36 to move upwards, at the moment, the standard sensor 33 applies an upward acting force to the pressure head 32, the pressure head 32 and the standard sensor 33 are positioned through a central hole, the other end of the superposed pull rod 35 pulls the adapter 42 upwards, the upper pull head 41 connected with the adapter 42 is provided with the electronic hanging scale, the standard sensor 33 can detect an acting force value applied by the oil cylinder 34, the electronic hanging scale also displays an acting force value, and the electronic hanging scale is verified by comparing the two acting force values.
The stacking mechanism 3 further comprises a force equalizing plate 37, the standard sensors 33 are plural and are fixedly arranged along the circumferential direction of the base plate 36, the number of the pressure heads 32 corresponds to that of the standard sensors 33, and each pressure head 32 is fixedly connected with the force equalizing plate 37. Thus, the force applied by the oil cylinder 34 is more uniformly transmitted to each pressure head 32 and the test pressure plate 31, and the electronic hanging scale is more accurately verified by combining the measured force values of each standard sensor 33.
Referring to fig. 6 to 7a, the automatic loading and unloading mechanism 4 of the electronic hanging scale includes an upper slider 41, an adapter 42, a movable seat 43 and a cantilever 44, and further includes a second lead screw 45, a second servo motor 46 and a bearing seat 47, and a first linear guide rail 48 and a first linear slider 49; the cantilever bracket 44 is fixedly connected with the movable beam 2, the first linear guide rail 48 is fixedly connected with the cantilever bracket 44, the first linear sliding block 49 is fixedly connected with the movable base 43, and the first linear sliding block 49 is slidably connected with the first linear guide rail 48; the movable base 43 is located below the movable cross beam 2, the adapter 42 is provided with a convex portion 421, the adapter 42 is connected with the movable base 43 in a vertical sliding manner, the convex portion 421 can clamp the movable base 43, the adapter 42 is further fixedly connected with the upper pull head 41, the adapter 42 is provided with a groove 422, and the other end of the stacking pull rod 35 is connected with the groove 422 in a matching manner; specifically, the groove 422 is an inverted "T" groove 422, the other end of the stacking pull rod 35 is clamped in the inverted "T" groove 422, and the adapter 42 can be lifted when the stacking pull rod 35 moves upwards, so that an upward acting force is applied to the electronic hanging scale mounted on the upper pull head 41 connected with the adapter 42; when the stacking pull rod 35 does not work, the convex portion 421 of the adapter 42 catches the movable base 43, so that the adapter 42 is prevented from being separated from the movable base 43. The bearing blocks 47 are two and are fixedly arranged at two ends of the cantilever support 44 respectively, two ends of the second lead screw 45 are rotatably connected with the bearing blocks 47 respectively, the second lead screw 45 penetrates through the movable seat 43 and is in threaded connection with the movable seat, the body of the second servo motor 46 is fixedly connected with one of the bearing blocks 47, and an output shaft of the second servo motor 46 is in transmission connection with the second lead screw 45. The second servo motor 46 rotates the second lead screw 45 forward or backward, thereby moving the movable base 43 forward or backward; when the electronic hanging scale needs to be replaced, the moving seat 43 is driven by the second servo motor 46 to move outwards, the inverted T-shaped groove 422 of the adapter 42 is separated from the other end of the stacking pull rod 35, when the moving seat 43 moves outwards to a specified position, a worker replaces the electronic hanging scale located on the upper pull head 41, and the upper end of the electronic hanging scale and the upper pull head 41 are fixed through the inserted pin.
The automatic electronic hanging scale loading and unloading mechanism 4 is used for installing and disassembling the electronic hanging scale to be detected; when the electronic hanging scale needs to be installed, the first servo drives the first screw rod 61 to rotate, the movable beam 2 is driven to move downwards to a required position, the second servo motor 46 drives the second screw rod 45 to rotate, the second screw rod 45 drives the movable base 43 and the first linear sliding block 49 to move outwards on the first linear guide rail 48 through the matching of the ball screw nut, the adapter 42 and the upper pull head 41 move outwards along with the movable base 43 together, and the electronic hanging scale stops when the electronic hanging scale moves to a position where a hook of the electronic hanging scale can be buckled. When the upper hook part of the electronic hanging scale and the upper pull head 41 are fixed through the inserted pin, the moving beam 2 moves upwards, and when the lower hook part of the electronic hanging scale can be matched with the lower pull head 51, the moving beam 2 stops moving; meanwhile, the second servo motor 46 drives the second screw rod 45 to drive the moving seat 43, the upper pull head 41 and the electronic hanging scale of the upper pull head 41 to move towards the center of the rack 1, a positioning device is arranged at the center of the rack 1, when the moving seat 43 moves to the positioning device, the movement is stopped, and at this time, the upper pull head 41 is located at the center of the rack 1. At this time, the up-and-down movement of the movable beam 2 is adjusted to make the lower hook part of the electronic hanging scale completely contact with the lower slider 51, and the plug pin is inserted, so that the electronic hanging scale is installed. After the electronic crane scale is calibrated, the electronic crane scale needs to be dismounted from the rack 1, and the operation scheme is opposite to that in the loading process.
Referring to fig. 9 to 11 again, the dead weight and weight mechanism 5 includes a lower slider 51, a ball-end pull rod 52, a ball seat 53, a weight connector 54 and a weight assembly 55, the lower slider 51 is located above the middle support plate 12, the ball seat 53 is fixedly arranged on the middle support plate 12, the ball-end pull rod 52 passes through the ball seat 53 and is connected in a sliding manner, one end of the ball-end pull rod 52 is fixedly connected with the lower slider 51, the other end of the ball-end pull rod 52 is fixedly connected with one end of the weight connector 54, and the other end of the weight connector 54 is detachably connected with the weight assembly 55. When the verification work is carried out, a required weight is added to the other end of the weight connecting piece 54, the weight connecting piece 54 has an added downward acting force, so that the ball head pull rod 52 and the lower pull head 51 have the downward acting force, the electronic hanging scale is installed on the lower pull head 51, the electronic hanging scale displays an acting force value, and a worker compares the weight of the added weight mark through calculation, so that the electronic hanging scale is subjected to static verification.
The weight lifting driving mechanism 7 comprises a weight lifting plate 71, a third screw 72 and a third servo motor 73, the top end of the third screw 72 is rotatably connected with the intermediate support plate 12, the bottom end of the third screw 72 is rotatably connected with the bottom plate 13, the third screw 72 is also in threaded connection with the weight lifting plate 71, and when the third screw 72 rotates forwards or backwards, the weight lifting plate 71 moves up and down; the body of the third servo motor 73 is fixedly connected with the bottom plate 13, and an output shaft of the third servo motor 73 is in transmission connection with the bottom end of the third screw rod 72; referring to the above paragraphs, a quincuncial coupling, a commutator and a reducer are also arranged between the third servomotor 73 and the third lead screw 72.
Referring to fig. 9 to 10a, the weight assembly 55 includes a weight connecting seat 551, a weight connecting sleeve 552, a weight connecting shaft 553, and a weight body 554 having an inner hole 5541, the weight body 554 has a plurality of weight bodies 554, the weight body 554 at the top is fixedly connected to the weight connecting seat 551, the weight connecting seat 551 is connected to the lower end of the weight connecting member 54 in a snap-fit manner, the weight connecting shaft 553 and the weight connecting sleeve 552 are disposed between two adjacent weight bodies 554, the upper end of the weight connecting shaft 553 is embedded into the inner hole 5541 of the weight above, the lower end of the weight connecting shaft 553 is fixedly connected to the weight connecting sleeve 552 through a screw thread, and the weight connecting sleeve 552 is also fixedly connected to the inner hole 5541 of the weight below; the weight body 554 at the bottom is placed on the upper surface of the weight moving plate 81, and the weight moving plate 81 is placed on the weight raising/lowering plate 71. The weight body 554 has various weight specifications according to actual conditions, and the weight body 554 with each weight specification has a plurality of weight specifications.
The connection between the weights is carried out in a mode of socket joint step by step. The weight assembly 55 is assembled specifically as follows, the weight connecting sleeve 552 is fixedly installed on the inner hole 5541 of the nth weight body 554 at the bottom end through a plurality of bolts, the nth weight body 554 is placed at the back, the weight connecting shaft 553 passes through the inner hole 5541 of the nth weight body to be installed with the weight connecting sleeve 552 in a threaded connection mode in a matching mode, after the weight connecting sleeve 552 on the nth weight body 554 is installed, and by analogy, the weight body 554 is installed from bottom to top until the 1 st weight body 554 at the top end is installed, and finally, the weight connecting seat 551 and the weight connecting piece 54 are installed. When loading, as shown in the figure, the weight lifting mechanism drives the weight lifting plate 71 to move downwards, the weight lifting plate 71 drives the weight to move downwards integrally, the weight moves until the weight connecting piece 54 contacts with the weight connecting seat 551, at this time, the weight connecting seat 551 and the 1 st weight body 554 thereof are pulled up together by the weight connecting piece 54, namely, the 1 st weight body 554 is loaded, when the 2 nd weight body 554 needs to be loaded, an instruction is continuously sent to the weight lifting driving mechanism 7, so that the weight lifting driving mechanism 7 continuously drives the weight lifting plate 71 to move downwards until the upper end of the weight connecting shaft 553 connected with the 2 nd weight body 554 contacts with the inner hole 5541 of the weight body 554, namely, the 2 nd weight is loaded, and so on, until all the weight bodies 554 are loaded. When unloading, the weight lifting driving mechanism 7 drives the weight lifting plate 71 to move upwards until the upper surface of the nth weight body 554 at the bottom end is attached to the lower surface of the nth weight body 554, and at the moment, the upper end of the weight connecting shaft 553 is separated from the nth weight body 554, so that unloading of the nth weight body 554 is realized, the weight lifting plate 71 is pushed in the secondary category to continue to move upwards until the weight connecting seat 551 of the 1 st weight body 554 at the top end is separated from the lower end of the weight connecting piece 54, so that unloading of all weights is completed.
Referring to fig. 12 to 13, the weight conveying mechanism 8 includes a weight moving plate 81, a second linear guide 82, a second linear slider 83, and a guide support column, the second linear guide 82 is fixedly connected to the upper surface of the weight lifting plate 71, the second linear guide 82 is further fixedly connected to the guide support column, the second linear slider 83 is fixedly connected to the lower surface of the weight moving plate 81, the second linear slider 83 is slidably connected to the second linear guide 82, and a weight body 554 located at the bottom is placed on the upper surface of the weight moving plate 81. When it is desired to remove the weight assembly 55, the weight connecting base 551 is disconnected from the top weight body 554, the weight lifting plate 71 is moved downward to the original position, and then the weight moving plate 81 is moved from the position of the weight lifting plate 71 to the position of the guide rail supporting column. Wherein, a handle 811 is fixedly arranged on the weight moving plate 81, which is convenient for the staff to move the weight moving plate 81. The weight conveying mechanism 8 further comprises a weight positioning seat 85, the bottom end of the weight positioning seat 85 is fixedly connected to the weight moving plate 81, and the top end of the weight positioning seat 85 can be inserted into the inner hole 5541 of the weight body 554 at the bottom; the weight positioning seat 85 is conical.
Referring to fig. 3 and 11 again, the discrimination threshold testing mechanism 9 includes a guiding frame 91, a fourth screw 92, a testing moving beam 93 and a force sensor 94, the guiding frame 91 is fixedly connected to the lower surface of the middle supporting plate 12, the testing moving beam 93 is slidably connected to the guiding frame 91 up and down, wherein the guiding frame 91 has a guide rod 911, and the testing moving beam 93 is slidably connected to the guide rod 911; two ends of the fourth screw 92 are rotatably connected with the guide frame 91, the fourth screw 92 is further in threaded connection with the test moving beam 93, and when the fourth screw 92 rotates forwards or backwards, the test moving beam 93 can move upwards and downwards; the force sensor 94 is fixedly connected with the test moving beam 93, the weight connecting piece 54 penetrates through the force sensor 94 and is connected in a sliding mode, the weight connecting piece 54 is provided with a blocking ring 541, and the blocking ring 541 is located below the force sensor 94. The force sensor 94 may be used with a small range to meet the loading requirements in the identification threshold schedule. When the electronic hanging balance discrimination threshold test is performed, the test moving beam 93 moves downward, so that the force sensor 94 generates a downward acting force on the stopper ring 541, the force sensor 94 displays the value of the acting force, and the downward acting force is applied to the weight connecting member 54, and further to the ball pull rod 52, the pull-down head 51 and the electronic hanging balance. According to actual needs, the magnitude of the acting force applied to the weight connecting piece 54 is controlled by adjusting the movement amount of the test moving beam 93, the force sensor 94 displays the change of the numerical value of the applied acting force, and meanwhile, a worker observes whether the display numerical value of the electronic hanging scale changes and the change amount.
The discrimination threshold test mechanism 9 functions as a loading structure required for the discrimination threshold test performed at the time of the inspection of the electronic hanging scale. According to the requirements of the national metrological verification regulation JJJG 539-: "on a balance scale, an additional load equal to 1.4 times the actual division (1.4e) is gently placed or removed, and the scale indication should change significantly. "according to the regulation requirement, the verification of the identification threshold of the electronic hanging scale is mainly carried out in a manual loading mode at present, generally, the loading is carried out every 0.1e, namely, small weights with different weights are prepared according to different division values. As shown in table 1 below, the electronic hanging scales with different specifications have different corresponding division values, a large number of small weights with different specifications need to be prepared, and when loading is needed, the electronic hanging scales are manually loaded one by one (0.1e) until the small weights with 1.4e are added. The loading mode has the advantages of low automation degree, large workload and low efficiency, and the manual loading is easy to cause high error rate. Therefore, the discrimination threshold testing mechanism 9 provided by the invention can realize automatic loading and unloading of the discrimination threshold test, and has high accuracy and high automation level.
During loading: when the electronic hanging scale is in a balanced state (namely, the weight is in a loaded state), the fourth servo motor drives the fourth screw rod 92 to rotate, so that the test moving beam 93 moves downwards along the guide rod 911, a force value is generated after the force sensor 94 on the test moving beam 93 is in contact with the baffle ring 541 of the weight connecting piece 54, according to the principle of acting force and reaction force, a load is applied to the weight connecting piece 54 at the moment, namely, the electronic hanging scale, the rotating amount of the fourth servo motor is controlled by the control system at the moment, a load increment of 0.1e is slowly applied to the force sensor 94 until the loading of 1.4e is completed, and at the moment, whether the indication value of the electronic hanging scale is obviously changed or not is observed, namely, the test for identifying the threshold is completed.
TABLE 1 identification threshold loading List
The invention relates to a combined type calibrating device of an electronic hanging scale, which has the specific implementation scheme that: taking an example that the combined type calibrating device with the measuring range of 50t of the invention calibrates a 30-ton electronic hanging scale, the calibrating device contains a 5000kg weight, and the weights are sequentially from top to bottom: 10kg, 10kg, 20kg, 10kg, 50kg, 100kg, 200kg, 100kg, 500kg, 500kg, 500kg, 500kg, 500kg, 1000kg, 1000kg, the total weight is 5000kg, therefore the electronic hanging scale adopts the weight to carry out the verification in the small measuring range of 200-.
When the electronic hanging scale needs to be checked, the electronic hanging scale is placed on the middle supporting plate 12, the electronic hanging scale automatic loading and unloading mechanism 4 is driven by the second servo motor 46 to move the upper pull head 41 out to a specified position along the first linear guide rail 48, the beam driving mechanism 6 drives the movable beam 2 to move downwards until the upper pull head 41 reaches the upper hook position of the electronic hanging scale, and at the moment, the upper hook of the electronic hanging scale is placed inside the upper pull head 41 and inserted with a plug pin; then the upper pulling head 41 is sent to the place where the overlapping pulling rod 35 can be matched by the driving of the second servo motor 46, and the other end of the overlapping pulling rod 35 enters the inverted T-shaped groove 422 of the adapter 42. After reaching the designated position, the cross beam 2 is moved to ascend until the lower draw hook of the electronic hanging scale can be connected with the lower draw head 51 of the invention, and at the moment, the lower draw head 51 is inserted with the bolt, thus completing the installation of the electronic hanging scale. When the electronic hanging scale needs to be disassembled, the operation process is opposite to that of the installation process. And after the electronic hanging scale is installed, the verification is started.
During detection, weights are adopted to load within the range of 5000 kg. The first servo motor 62 drives four first lead screws 61 synchronously through a coupler 63, a commutator 64 and a speed reducer 65, the first lead screws 61 drive the movable beam 2 to move upwards until the electronic hanging scale to be measured generates an indication value, a displacement sensor arranged on the middle connecting plate starts to output a displacement signal, when the displacement signal reaches a target value, the hanging part is combined with a pull-down hook of the electronic hanging scale and separated from a first-stage weight, the movable beam 2 stops, the load of the pull-down head 51 and the weight connecting piece 54 under the action of the gravity of the hanging part is completed, and at the moment, the electronic hanging scale is cleared.
Then, the weight lifting driving mechanism 7 starts to work, the third servo motor 73 synchronously drives the four third screw rods 72 to rotate through the coupler, the steering gear and the speed reducer, the weight lifting plate 71 is driven to move downwards, a servo closed-loop control system is carried out according to the displacement signal of the weight lifting plate 71, the weight lifting plate 71 is controlled to move according to the displacement signal when the target weight is not loaded until the 6 th weight (100kg) is loaded in place, the loading of the first detection point 200kg is completed, and the indicating value of the electronic hanging scale is read at the moment, namely the indicating value of the first detection point. In the second verification point of 5000kg, the third servo motor 73 continues to control the weight lifting plate 71 to move downwards until the loading of all weights is completed, namely the information of the displacement sensor reaches a target set value, at the moment, the weights are separated from the weight moving plate 81, the loading of the 5000kg weights is completed, and the indication value of the electronic hanging scale is read.
After the weight loading is completed, the wide-range verification is carried out by adopting a superposition structure. Since the oil cylinder 34 and the reference sensor 33 are mounted on the movable cross member 2, the pressing force of the reference sensor 33 can be converted into the pulling force by the reaction structure formed by superimposing the pull rod 35 and the upper slider 41. When the superposition system works, the servo hydraulic power system controls the loading oil cylinder 34, the standard sensor 33 and the tested electronic hanging scale are simultaneously loaded by the acting force between the upper pull head 41 and the superposition pull rod 35, the force value of the standard sensor 33 is used as a reference force standard to form a closed-loop control system, the tested electronic hanging scale is connected with the standard sensor 33 in series through the upper pull head 41, and the stress is equal. When the standard sensor 33 reaches the target set point, the loading of the set point is completed.
The discrimination threshold test was performed at 20e, 50% max, i.e., 200kg, 15000kg, 30000kg, respectively. Taking the loading 20e as an example, after the weight finishes the loading of 20e (200kg), the discrimination threshold testing system is started, the fourth servo motor in the discrimination threshold testing mechanism 9 drives the fourth screw rod 92 to drive the testing moving beam 93 and the force sensor 94 to move downwards until the force sensor 94 contacts with the baffle ring 541 of the weight connecting piece 54, so that an indication value is generated, a closed-loop control system is formed by the force sensor 94 and the fourth servo motor, a force value of 0.1e (1kg) is slowly loaded until the force sensor 94 finishes a force value of 1.4e (14kg), at this time, whether the indication value of the electronic hanging scale is obviously changed or not is observed, a change result is recorded, after the testing is finished, the fourth servo motor drives the testing moving beam 93 to move upwards, and the testing moving beam 93 and the force sensor 94 are separated from the weight connecting piece 54, so that the discrimination threshold testing is finished.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (10)
1. The utility model provides a combination formula calibrating installation of electronic hanging scale which characterized in that: the automatic loading and unloading mechanism of the electronic hanging scale comprises a rack, a movable beam, a stacking mechanism, an automatic loading and unloading mechanism of the electronic hanging scale and a dead weight mechanism, wherein the rack is provided with a top connecting plate, a middle supporting plate and a bottom plate, and the movable beam is connected to the rack in an up-and-down sliding manner and is positioned between the top connecting plate and the middle supporting plate;
the stacking mechanism comprises a test pressing plate, a pressing head, a standard sensor, an oil cylinder and a stacking pull rod, wherein a cylinder body of the oil cylinder is fixedly connected with the movable cross beam, a base plate is fixedly arranged on a piston of the oil cylinder and is positioned above the movable cross beam, the standard sensor is fixedly arranged on the base plate, the pressing head is fixedly connected with the test pressing plate, the pressing head props against the standard sensor, the stacking pull rod penetrates through center holes of the oil cylinder and the base plate and is in sliding connection with the center holes, and one end of the stacking pull rod is fixedly connected with the test pressing plate;
the automatic loading and unloading mechanism of the electronic hanging scale comprises an upper pull head, an adapter, a moving seat and a cantilever support, wherein the cantilever support is fixedly connected with the moving beam, the moving seat is slidably connected with the cantilever support, the moving seat is positioned below the moving beam, the adapter is provided with a convex part, the adapter is slidably connected with the moving seat up and down, the convex part can clamp the moving seat, the adapter is also fixedly connected with the upper pull head, the adapter is provided with a groove, and the other end of the superposed pull rod is in matched connection with the groove;
the dead weight mechanism comprises a lower pull head, a ball head pull rod, a ball head seat, a weight connecting piece and a weight component, wherein the lower pull head is positioned above the middle supporting plate, the ball head seat is fixedly arranged on the middle supporting plate, the ball head pull rod penetrates through the ball head seat and is in sliding connection with the middle supporting plate, one end of the ball head pull rod is fixedly connected with the lower pull head, the other end of the ball head pull rod is fixedly connected with one end of the weight connecting piece, and the other end of the weight connecting piece is connected with the weight component in a dismounting manner.
2. The combined calibrating device of the electronic hanging scale according to claim 1, characterized in that: the beam driving mechanism comprises a first lead screw and a first servo motor, the top end of the first lead screw is connected with the top connecting plate in a rotating mode, the bottom end of the first lead screw is connected with the middle supporting plate in a rotating mode, the first lead screw is further connected with the movable beam in a threaded mode, the machine body of the first servo motor is fixedly connected with the top connecting plate, and the output shaft of the first servo motor is connected with the top end of the first lead screw in a transmission mode.
3. The combined calibrating device of the electronic hanging scale according to claim 2, characterized in that: the beam driving mechanism further comprises a guide post, the guide post is fixedly arranged between the top connecting plate and the middle supporting plate, and the movable beam is connected with the guide post in a sliding mode.
4. The combined calibrating device of the electronic hanging scale according to claim 1, characterized in that: the stacking mechanism further comprises a force equalizing plate, the standard sensors are provided with a plurality of pressure heads and are fixedly arranged along the circumferential direction of the substrate, the number of the pressure heads corresponds to that of the standard sensors, and each pressure head is fixedly connected with the force equalizing plate.
5. The combined calibrating device of the electronic hanging scale according to claim 1, characterized in that: the automatic loading and unloading mechanism of the electronic hanging scale further comprises two second lead screws, a second servo motor and bearing seats, wherein the two bearing seats are fixedly arranged at two ends of the cantilever support respectively, two ends of each second lead screw are rotatably connected with the corresponding bearing seat respectively, the second lead screws penetrate through the movable seats and are in threaded connection, a machine body of each second servo motor is fixedly connected with one of the bearing seats, and an output shaft of each second servo motor is in transmission connection with the corresponding second lead screw.
6. The combined calibrating device of the electronic hanging scale according to claim 5, characterized in that: the automatic loading and unloading mechanism of the electronic hanging scale further comprises a first linear guide rail and a second linear sliding block, the first linear guide rail is fixedly connected with the cantilever support, the first linear sliding block is fixedly connected with the movable base, and the first linear sliding block is connected with the first linear guide rail in a sliding mode.
7. The combined calibrating device of the electronic hanging scale according to claim 1, characterized in that: the weight lifting driving mechanism comprises a weight lifting plate, a third screw rod and a third servo motor, the top end of the third screw rod is rotatably connected with the middle supporting plate, the bottom end of the third screw rod is rotatably connected with the bottom plate, the third screw rod is further in threaded connection with the weight lifting plate, the machine body of the third servo motor is fixedly connected with the bottom plate, and the output shaft of the third servo motor is in transmission connection with the bottom end of the third screw rod;
the weight assembly includes weight connecting seat, weight adapter sleeve, weight connecting axle, sets up the weight body of hole, the weight body has a plurality ofly, is in the weight body and the weight connecting seat fixed connection at top, weight connecting seat joint in the lower extreme of weight connecting piece is provided with between two adjacent weight bodies about the weight connecting axle and weight adapter sleeve, the upper end embedding of weight connecting axle in the hole of the weight body of top, the lower extreme of weight connecting axle with the weight adapter sleeve passes through screw thread fixed connection, the weight adapter sleeve still with the below the hole fixed connection of the weight body, the weight body that is in the bottom place in the upper surface of weight lifter plate.
8. The combined calibrating device of the electronic hanging scale according to claim 7, wherein: still include weight conveying mechanism, weight conveying mechanism includes weight movable plate, second linear guide, second straight line slider and guide rail support column, second straight line guide fixed connection in the upper surface of weight lifter plate, second straight line guide still with guide rail support column fixed connection, second straight line slider fixed connection in the lower surface of weight movable plate, second straight line slider sliding connection in second linear guide, the weight body that is in the bottom place in the upper surface of weight movable plate.
9. The combined calibrating device of the electronic hanging scale according to claim 8, characterized in that: the weight conveying mechanism further comprises a weight positioning seat, the bottom end of the weight positioning seat is fixedly connected to the weight moving plate, and the top end of the weight positioning seat can be inserted into the inner hole of the weight body at the bottom.
10. The combined calibrating device of the electronic hanging scale according to claim 1, characterized in that: still including distinguishing threshold accredited testing organization, it includes leading truck, fourth lead screw, test walking beam and force sensor to distinguish threshold accredited testing organization, leading truck fixed connection in the lower surface of intermediate support board, sliding connection about the test walking beam in the leading truck, the both ends of fourth lead screw with the leading truck rotates to be connected, the fourth lead screw still with test walking beam threaded connection, force sensor with test walking beam fixed connection, the weight connecting piece passes force sensor and sliding connection, the weight connecting piece has the fender ring, it is located to keep off the ring the below of force sensor.
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| CN201910994366.8A CN110763322A (en) | 2019-10-18 | 2019-10-18 | Combined type calibrating device of electronic hanging scale |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111829641A (en) * | 2020-08-13 | 2020-10-27 | 南通市计量检定测试所（江苏省南通质量技术监督眼镜产品质量检验站、江苏省南通质量技术监督金银珠宝饰品产品质量检验站、江苏省大容量南通计量站、南通市大流量计量中心） | Electronic platform scale calibrating device and calibrating method |
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| CN113188643A (en) * | 2021-04-26 | 2021-07-30 | 陕西省计量科学研究院 | Calibrating device of large-scale electronic hanging scale |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111829641A (en) * | 2020-08-13 | 2020-10-27 | 南通市计量检定测试所（江苏省南通质量技术监督眼镜产品质量检验站、江苏省南通质量技术监督金银珠宝饰品产品质量检验站、江苏省大容量南通计量站、南通市大流量计量中心） | Electronic platform scale calibrating device and calibrating method |
| CN112924086A (en) * | 2021-01-22 | 2021-06-08 | 上海工业自动化仪表研究院有限公司 | Centering installation structure and centering installation method of detected pull type sensor |
| CN112924086B (en) * | 2021-01-22 | 2024-02-06 | 上海工业自动化仪表研究院有限公司 | Centering installation structure and centering installation method of detected pull type sensor |
| CN113188643A (en) * | 2021-04-26 | 2021-07-30 | 陕西省计量科学研究院 | Calibrating device of large-scale electronic hanging scale |
| CN113188643B (en) * | 2021-04-26 | 2022-10-18 | 陕西省计量科学研究院 | Calibrating device of large-scale electronic hanging scale |
| CN113916182A (en) * | 2021-09-29 | 2022-01-11 | 苏州威达智电子科技有限公司 | Touch pad test equipment |
| CN113916182B (en) * | 2021-09-29 | 2022-05-17 | 苏州威达智电子科技有限公司 | Touch pad test equipment |
| CN114441027A (en) * | 2022-01-25 | 2022-05-06 | 济宁市计量测试所 | Measuring instrument testing system and testing method |
| CN114441027B (en) * | 2022-01-25 | 2023-11-03 | 济宁市计量测试所 | Measuring instrument testing system and measuring instrument testing method |
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