CN112229493A

CN112229493A - Automatic testing device for scale

Info

Publication number: CN112229493A
Application number: CN202011218796.XA
Authority: CN
Inventors: 马健; 杨伍阳; 熊忠琪; 虞建忠; 偰腾宽
Original assignee: Changzhou Accurate Weight Co ltd
Current assignee: Changzhou Accurate Weight Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-01-15

Abstract

The invention discloses an automatic testing device for a scale, and relates to the technical field of testing devices for scales. The upper end of a workbench is provided with a scale body, a top plate is arranged above the workbench, a rotatable weight storehouse is also arranged above the workbench, a plurality of weight strings are hung on the weight storehouse, a telescopic component capable of moving up and down is arranged above the workbench, the lower end of the telescopic component is provided with a mechanical claw capable of grabbing the weight strings, the telescopic component is provided with a sliding seat, and the sliding seat can move in the direction close to the weight storehouse. Can realize snatching the weight cluster of different quality, then place and carry out the test on the balance, shift out the weight cluster after the test finishes and carry out the retest, reduce artificial intensity of labour, improve work efficiency.

Description

Automatic testing device for scale

Technical Field

The invention relates to the technical field of testing devices for scales, in particular to an automatic testing device for scales.

Background

The scale is a weighing apparatus used for weighing the weight of an object. In modern mass metering, the weight is the standard gauge for mass-to-quantity transfer.

After the scale is manufactured, the weighing performance, the unbalance loading, the linearity, the repeatability, the peeling and the like of the scale are often required to be tested. However, in the prior art, the weights are required to be taken manually and then loaded on the scale, and the weights are taken down one by one after the test is finished, so that the labor intensity of manual operation is high, the test efficiency is low, the force and the position of the weights placed manually on the scale are different, and the measurement error is large.

Therefore, an automatic testing device for a scale is urgently needed, which can automatically select corresponding weight strings according to the measuring ranges of different scales, test and collect test data of the scales according to calibration rules, such as calibration, linearity, unbalance loading, repeatability, peeling and the like, and can automatically supervise and verify the action accuracy in the testing process and judge the testing result. The labor intensity of workers is reduced, and the working efficiency is improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an automatic testing device for a scale, which can automatically select corresponding weight strings according to the measuring ranges of different scales, test the scales according to the verification rules, test the performances of calibration, linearity, unbalance loading, repeatability, peeling and the like, and collect test data, reduce the labor intensity of workers, improve the working efficiency and improve the test accuracy. The labor intensity of workers is reduced, and the working efficiency is improved.

The invention specifically adopts the following technical scheme:

the automatic testing device for the scale comprises a workbench, wherein a scale body is arranged at the upper end of the workbench, a top plate is further arranged above the workbench, a rotatable weight storehouse is further arranged above the workbench, a plurality of weight strings are hung on the weight storehouse, a telescopic component capable of moving up and down is arranged above the workbench, mechanical claws capable of grabbing the weight strings are mounted at the lower end of the telescopic component, and a sliding seat is mounted on the telescopic component and can move in the direction close to the weight storehouse.

The present invention is further preferred: the weight library comprises a servo motor and a rotating disc; the servo motor and the speed reducer are installed at the upper end of the top plate, the lower end of the servo motor penetrates through the top plate and then is connected with the rotary disk, a plurality of first placing holes are formed in the periphery of the rotary disk, first guide grooves penetrating through the side wall of the rotary disk are formed in the outer walls of the first placing holes, a positioning column with the diameter smaller than that of each first guide groove is arranged at the upper end of the weight string, and a first limiting block is arranged at the upper end of each positioning column.

The present invention is further preferred: the reference column cover is equipped with the second stopper that is located first stopper lower extreme, and the interval between first stopper and the second stopper is greater than the thickness of rotary disk, and the gripper runs through to have seted up the second and places the hole, and the lateral wall that the hole was placed to the second is provided with the second guide way that runs through the gripper lateral wall, and the width of second guide way is greater than the diameter of reference column.

The present invention is further preferred: the width of the first guide groove is smaller than the diameter of the first placing hole, and the width of the second guide groove is smaller than the diameter of the second placing hole.

The present invention is further preferred: the lower extreme of first stopper is provided with first round platform, and the first constant head tank of mutual adaptation with first round platform is seted up to the upper end of first placing the hole, and the lower extreme of second stopper is provided with the second round platform, and the second constant head tank of mutual adaptation with the second round platform is seted up to the upper end of second placing the hole.

The present invention is further preferred: the roof runs through along thickness direction and has seted up the guide way, and the guide way is spaned at the both ends of slide, and flexible subassembly is one of electricity jar, cylinder or pneumatic cylinder, and flexible unit mount is in the slide upper end, and the lower extreme of flexible subassembly run through slide and guide way in proper order and with gripper interconnect, and ball screw drive assembly is installed to the slide.

The present invention is further preferred: the lower extreme of the balance body is provided with places the board, and the lower extreme of placing the board is provided with the cross module.

The present invention is further preferred: the upper end of the placing plate is provided with a right-angle limiting block used for positioning the scale body.

The present invention is further preferred: the weight cluster includes a plurality of weight body of vertical setting, and the lateral wall of weight body is provided with a plurality of screw holes, and screw hole threaded connection has the dead lever, through solid fixed ring interconnect between the dead lever of adjacent weight body.

The present invention is further preferred: and a weighing sensor is also arranged between the telescopic assembly and the mechanical claw.

The invention has the beneficial effects that:

1. according to the invention, the weight storehouse capable of rotating is arranged, the weight storehouse is hung with a plurality of weight strings, the upper end of the workbench is provided with the mechanical claw capable of grabbing the weight strings, the mechanical claw can grab the weight strings on the weight storehouse and then place the weight strings on the weight storehouse on the scale body for testing the scale body, and after the test is finished, the mechanical claw places the weight strings on the scale body back to the weight storehouse. The weight storehouse is rotatory, can align the weight cluster of different masses with the gripper, makes things convenient for the gripper to take off the weight cluster, carries out weight test, peeling test and unbalance loading test etc. to the balance body. On the balance body is placed with the weight cluster of different masses through mechanical mode, when the accurate repetition of needs is placed same position, can guarantee to put same position, guarantees measuring accuracy. The manual repeated taking and placing are not needed, and the labor intensity of the manual work is reduced.

2. The rotation of the rotating disk is driven by the servo motor, the rotating angle of the rotating disk is conveniently controlled each time, and the positioning columns of the weight strings are aligned with the mechanical claws after the rotating disk rotates a certain angle each time. The rotating disc runs through and has seted up a plurality of first placing holes, places the lateral wall in hole and sets up the first guide way that runs through the rotating disc, and the upper end of weight cluster is provided with the reference column, and the upper end of reference column is provided with first stopper. When the weight string is hung on the rotating disk, the first limiting block is positioned at the upper end of the first placing hole, and the weight string is supported by the first limiting block. When the weight string needs to be taken down, the outward force is only needed to be applied to the weight string, and the positioning column is moved out of the first placing hole through the first guide groove. The taking-down and putting-in modes are simple, fast, stable and reliable.

3. The mechanical claw is provided with a second placing hole and a second guide groove, when a weight string needs to be grabbed, the positioning column located below the second limiting block enters the second placing hole through the second guide groove, and the second placing hole is matched with the second limiting block. At the moment, the whole gravity of the weight string plays a supporting role by the second limiting block, the first limiting block is separated from the rotating disk, and the weight string can be taken down from the rotating disk by applying an outward force to the weight string.

4. The width of the first guide groove is smaller than the diameter of the first placing hole, and the width of the second guide groove is smaller than the diameter of the second placing hole. And the lower end of the first limiting block is provided with a first round table, and the upper end of the first placing hole is provided with a first positioning groove. When having guaranteed that the weight cluster is placed on the rotary disk, play the supplementary spacing effect to first stopper, avoid the weight cluster to slide at will, the weight cluster is followed first guide way roll-off when avoiding not needing to take off, brings the potential safety hazard. The principle of the gripper is the same.

5. The guide groove is arranged to ensure that the telescopic component can move smoothly and move back and forth between the weight library and the scale body. The lateral shifting of flexible subassembly realizes through ball transmission assembly, and ball sets each other with the lower extreme of slide, and the both ends of slide are provided with the guide bar of direction usefulness, and the lower extreme of slide is provided with the guiding hole that the guide bar of being convenient for runs through, and the ball silk post is connected with second servo motor.

6. Through setting up the cross module, realize placing the removal of board on the horizontal plane, realize the balance body in the position control of horizontal plane, do not need artifical the regulation, can test the unbalance loading performance such as the balance body. Through setting up the right angle stopper, swiftly fix a position the balance body.

7. A weighing sensor is arranged between the telescopic component and the mechanical claw, and the weight string on the mechanical claw is subjected to auxiliary detection through the weighing sensor, so that the weight string grabbed by the mechanical claw is ensured to be the weight string required to be used, and meanwhile, the accuracy of weight loading in the test process can be supervised and verified.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of FIG. 1;

FIG. 3 is a schematic view of a weight stack and a weight stack in a three-dimensional configuration;

FIG. 4 is an enlarged view of the structure at A in FIG. 3;

FIG. 5 is a schematic view of the structure of a weight string;

FIG. 6 is a schematic perspective view of the telescopic assembly and the gripper;

FIG. 7 is an enlarged view of the structure at B in FIG. 6;

FIG. 8 is a perspective view of the placement board and the cross module;

in the figure, 1-workbench, 2-scale body, 3-top plate, 4-placing plate, 401-right angle stopper, 402-cross module, 5-weight library, 501-rotating disk, 5011-first placing hole, 5012-first positioning groove, 5013-first guiding groove, 502-servo motor, 6-weight string, 7-telescopic component, 701-weighing sensor, 702-gripper, 7021-second placing hole, 7022-second positioning groove, 7023-second guiding groove, 703-ball screw transmission component, 704-sliding seat, 8-positioning column, 801-first stopper, 8011-first circular table, 802-second stopper, 8021-second circular table, 9-fixing ring, 10-weight body, 11-fixing rod.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

Example 1

The automatic testing device for the scale comprises a workbench 1, wherein a scale body 2 is arranged at the upper end of the workbench 1, a top plate 3 is further arranged above the workbench 1, a rotatable weight storehouse 5 is further arranged above the workbench 1, a plurality of weight strings 6 are hung on the weight storehouse 5, a telescopic component 7 capable of moving up and down is arranged above the workbench 1, mechanical claws 702 capable of grabbing the weight strings 6 are arranged at the lower end of the telescopic component 7, a sliding seat 704 is arranged on the telescopic component 7, and the sliding seat 704 can move in the direction close to the weight storehouse 5.

After the technical scheme is adopted: according to the invention, the weight storehouse 5 capable of rotating is arranged, the weight storehouse 5 is hung with a plurality of weight strings 6, the upper end of the workbench 1 is provided with the mechanical claw 702 capable of grabbing the weight strings 6, the mechanical claw 702 can grab the weight strings 6 on the weight storehouse 5 and then place the weight strings on the weight body 2 for testing the weight body 2, and after the test is finished, the mechanical claw 702 places the weight strings 6 on the weight body 2 back to the weight storehouse 5. The weight storehouse 5 rotates, can align the weight cluster 6 of different masses with the gripper 702, make things convenient for the gripper 702 to take off the weight cluster 6, carry out weight test, peel test and unbalance loading test etc. to the balance body 2. On placing the balance body 2 with the weight cluster 6 of different masses through mechanical mode, when the accurate repetition of needs is placed same position, can guarantee to put same position, guarantee measuring accuracy nature. The manual repeated taking and placing are not needed, and the labor intensity of the manual work is reduced.

Example 2

The present embodiment is further optimized on the basis of embodiment 1 as follows: the weight vault 5 comprises a servo motor 502 and a rotating disk 501; the servo motor 502 is installed at the upper end of the top plate 3, the lower end of the servo motor 502 penetrates through the top plate 3 and then is connected with the rotating disc 501, a plurality of first placing holes 5011 are formed in the periphery of the rotating disc 501, first guide grooves 5013 penetrating through the side wall of the rotating disc 501 are formed in the outer wall of the first placing holes 5011, positioning columns 8 with the diameter smaller than that of the first guide grooves 5013 are arranged at the upper ends of the weight strings 6, and first limiting blocks 801 are arranged at the upper ends of the positioning columns 8.

After the technical scheme is adopted: the rotation of rotary disk 501 is driven through servo motor 502, conveniently controls the rotation angle of rotary disk 501 every time, guarantees to rotate certain angle at every turn after, and the reference column 8 of weight cluster 6 all aligns with gripper 702. The rotating disc 501 is provided with a plurality of first placing holes 5011 in a penetrating manner, the side walls of the placing holes are provided with first guide grooves 5013 in a penetrating manner through the rotating disc 501, the upper end of the weight string 6 is provided with a positioning column 8, and the upper end of the positioning column 8 is provided with a first limiting block 801. When the weight string 6 is hung on the rotating disk 501, the first limiting block 801 is located at the upper end of the first placing hole 5011, and the weight string 6 is supported by the first limiting block 801. When it is desired to remove the weight string 6, it is only necessary to apply an outward force to the weight string 6 to move the positioning columns 8 out of the first placement holes 5011 through the first guide grooves 5013. The taking-down and putting-in modes are simple, fast, stable and reliable.

Example 3

The present embodiment is further optimized on the basis of embodiment 1 as follows: the positioning column 8 is sleeved with a second limiting block 802 positioned at the lower end of the first limiting block 801, the distance between the first limiting block 801 and the second limiting block 802 is greater than the thickness of the rotating disc 501, a second placing hole 7021 is formed in the mechanical claw 702 in a penetrating manner, a second guide groove 7023 penetrating through the side wall of the mechanical claw 702 is formed in the side wall of the second placing hole 7021, and the width of the second guide groove 7023 is greater than the diameter of the positioning column 8.

After the technical scheme is adopted: the gripper 702 is provided with a second placing hole 7021 and a second guiding groove 7023, and when a weight string 6 needs to be grasped, the positioning column 8 located below the second limiting block 802 enters the second placing hole 7021 through the second guiding groove 7023, and the second placing hole 7021 and the second limiting block 802 are adapted to each other. At this time, the whole gravity of the weight string 6 is supported by the second stopper 802, the first stopper 801 is separated from the rotating disk 501, and an outward force is applied to the weight string 6, that is, the weight string 6 can be taken down from the rotating disk 501.

Example 4

The present embodiment is further optimized on the basis of embodiment 1 as follows: the first guide slot 5013 has a width smaller than the diameter of the first placement hole 5011, and the second guide slot 7023 has a width smaller than the diameter of the second placement hole 7021. The lower extreme of first stopper 801 is provided with first round platform 8011, and the upper end of first placing hole 5011 is seted up the first constant head tank 5012 with the mutual adaptation of first round platform 8011, and the lower extreme of second stopper 802 is provided with second round platform 8021, and the upper end of second placing hole 7021 is seted up the second constant head tank 7022 with the mutual adaptation of second round platform 8021.

After the technical scheme is adopted: the first guide slot 5013 has a width smaller than the diameter of the first placement hole 5011, and the second guide slot 7023 has a width smaller than the diameter of the second placement hole 7021. A first truncated cone 8011 is provided at the lower end of the first stopper 801, and a first positioning groove 5012 is provided at the upper end of the first placement hole 5011. When the weight string 6 is placed on the rotating disc 501, the effect of assisting limiting of the first limiting block 801 is achieved, the weight string 6 is prevented from sliding randomly, and the situation that the weight string 6 slides out of the first guide groove 5013 when not required to be taken down is avoided, so that potential safety hazards are brought. The gripper 702 is identical in principle.

Example 5

The present embodiment is further optimized on the basis of embodiment 1 as follows: roof 3 has run through along thickness direction and has seted up the guide way, and the guide way is spaned at the both ends of slide 704, and flexible subassembly 7 is one of electricity jar, cylinder or pneumatic cylinder, and flexible subassembly 7 is in slide 704 upper end, and the lower extreme of flexible subassembly 7 runs through slide 704 and guide way in proper order and with gripper 702 interconnect, and ball screw drive assembly 703 is installed to slide 704.

After the technical scheme is adopted: the guide groove is arranged to ensure that the telescopic component 7 can move smoothly and move back and forth between the weight storeroom 5 and the scale body 2. The lateral movement of the telescopic assembly 7 is realized by a ball screw transmission assembly 703, the ball screw is mutually matched with the lower end of a sliding seat 704, guide rods for guiding are arranged at two ends of the sliding seat 704, a guide hole convenient for the guide rod to penetrate through is arranged at the lower end of the sliding seat 704, and the ball post is connected with a second servo motor 502.

Example 6

The present embodiment is further optimized on the basis of embodiment 1 as follows: the lower extreme of the balance body 2 is provided with places board 4, and the lower extreme of placing board 4 is provided with cross module 402. The upper end of the placing plate 4 is provided with a right-angle limiting block 401 for positioning the scale body 2.

After the technical scheme is adopted: through setting up cross module 402, realize placing the removal of board 4 on the horizontal plane, realize the balance body 2 in the position control of horizontal plane, do not need artifical the regulation, can test performances such as unbalance loading of the balance body 2. Through setting up right angle stopper 401, swiftly install the location to the balance body 2.

Example 7

The present embodiment is further optimized on the basis of embodiment 1 as follows: the weight string 6 comprises a plurality of weight bodies 10 which are vertically arranged, the side walls of the weight bodies 10 are provided with a plurality of threaded holes, the threaded holes are in threaded connection with fixing rods 11, and the fixing rods 11 of the adjacent weight bodies 10 are mutually connected through fixing rings 9. A load cell 701 is also provided between the telescopic assembly 7 and the gripper 702.

After the technical scheme is adopted: a weighing sensor 701 is arranged between the telescopic component 7 and the mechanical claw 702, and the weight string 6 on the mechanical claw 702 is detected in an auxiliary manner through the weighing sensor 701, so that the weight string 6 grabbed by the mechanical claw 702 is ensured to be the weight string 6 required to be used.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. The utility model provides an automatic testing arrangement for balance, includes the workstation, the upper end of workstation is provided with the balance body, the top of workstation still is provided with roof, its characterized in that: the weight storage device is characterized in that a rotatable weight storage is further arranged above the workbench, a plurality of weight strings are hung on the weight storage, a telescopic assembly capable of moving up and down is arranged above the workbench, mechanical claws capable of grabbing the weight strings are mounted at the lower end of the telescopic assembly, a sliding seat is mounted on the telescopic assembly, and the sliding seat can move in the direction close to the weight storage.

2. The automatic testing device for a scale according to claim 1, wherein: the weight library comprises a servo motor and a rotating disc; the weight string is characterized in that the servo motor is installed at the upper end of the top plate, the lower end of the servo motor penetrates through the top plate and then is connected with the rotary disk, a plurality of first placing holes are formed in the periphery of the rotary disk, first guide grooves penetrating through the side wall of the rotary disk are formed in the outer walls of the first placing holes, a positioning column with the diameter smaller than that of each first guide groove is arranged at the upper end of the weight string, and a first limiting block is arranged at the upper end of each positioning column.

3. The automatic testing device for a scale according to claim 2, wherein: the positioning column is sleeved with a second limiting block located at the lower end of the first limiting block, the distance between the first limiting block and the second limiting block is larger than the thickness of the rotating disc, the mechanical claw is provided with a second placing hole in a penetrating mode, a second guide groove penetrating through the side wall of the mechanical claw is formed in the side wall of the second placing hole, and the width of the second guide groove is larger than the diameter of the positioning column.

4. The automatic testing device for a scale according to claim 3, wherein: the width of the first guide groove is smaller than the diameter of the first placing hole, and the width of the second guide groove is smaller than the diameter of the second placing hole.

5. The automatic testing device for a scale according to claim 3, wherein: the lower extreme of first stopper is provided with first round platform, the first constant head tank of mutual adaptation with first round platform is seted up to the upper end of first placing the hole, the lower extreme of second stopper is provided with the second round platform, the second constant head tank of mutual adaptation with the second round platform is seted up to the upper end of second placing the hole.

6. The automatic testing device for a scale according to claim 1, wherein: the roof runs through along thickness direction and has seted up the guide way, the guide way is spaned at the both ends of slide, flexible subassembly is one of electricity jar, cylinder or pneumatic cylinder, and flexible unit mount is in the slide upper end, the lower extreme of flexible subassembly run through slide and guide way in proper order and with gripper interconnect, ball screw drive assembly is installed to the slide.

7. The automatic testing device for a scale according to claim 1, wherein: the lower extreme of the balance body is provided with places the board, the lower extreme of placing the board is provided with the cross module.

8. The automatic testing device for a scale according to claim 1, wherein: the upper end of the placing plate is provided with a right-angle limiting block used for positioning the scale body.

9. The automatic testing device for a scale according to claim 1, wherein: the weight cluster includes a plurality of weight body of vertical setting, the lateral wall of weight body is provided with a plurality of screw holes, and screw hole threaded connection has the dead lever, through solid fixed ring interconnect between the dead lever of adjacent weight body.

10. The automatic testing device for a scale according to claim 1, wherein: and a weighing sensor is also arranged between the telescopic assembly and the mechanical claw.