Magnetic force measuring device of permanent magnet

Abstract

The present disclosure provides a kind of magnetic force measuring device of permanent magnet, belongs to detection technical field.The magnetic force measuring device includes: guide frame, sliding rod, connecting bracket and drive component;The guide frame includes two guide posts of parallel opposition, and the opposite side of two guide posts has the guide slot extending along the length direction of guide post;Two ends of the sliding rod are respectively inserted in the guide slot of two guide posts, and the opposite side of the end of the sliding rod is respectively attached with the opposite two side walls of the guide slot, the connecting bracket is connected with the sliding rod, and is located between the two ends of the sliding rod, and the connecting bracket is used to install the permanent magnet to be measured;The drive component is connected with the sliding rod, and the drive component is used to drive the sliding rod reciprocatingly moves along the guide slot.The present disclosure can improve the accuracy of the adsorption force test of permanent magnet.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of detection, and particularly relates to a magnetic force measuring device of a permanent magnet. BACKGROUND

[0002] A permanent magnet is a magnet that can maintain its magnetism for a long time. The permanent magnet is usually used to attract a device to a set position. When the permanent magnet is selected to attract the device, the attraction force generated by the permanent magnet needs to be considered to ensure that the device can be attracted to the set position without falling. The attraction force of the permanent magnet is usually measured by a magnetic force measuring device.

[0003] In the related art, the magnetic force measuring device comprises a test table, a driving member, a test frame, a permanent magnet to be tested, and an attracting part. The test frame and the driving member are located on the test table, and the driving member is used to drive the test frame to reciprocate along the vertical direction so as to make the test frame approach or move away from the test table. The permanent magnet to be tested is installed on the test frame, and the attracting part is installed on the test table and opposite to the permanent magnet to be tested. During testing, the permanent magnet to be tested is attracted to the attracting part, the driving member is controlled to gradually move the test frame away from the test table along the vertical direction, and the permanent magnet to be tested is separated from the attracting part until the attraction force of the permanent magnet to be tested is measured.

[0004] A plurality of driving members are usually installed on the test frame, and the plurality of driving members are symmetrically distributed on both sides of the permanent magnet to be tested, so as to ensure that the driving member can control the test frame to move along the vertical direction without tilting. However, the preparation cost of the magnetic force measuring device is increased by arranging a plurality of driving members, and if the different driving members do not synchronously drive the test frame, the problem of the moving direction of the test frame tilting still occurs, so that the traction force of the permanent magnet to be tested is not along the specified vertical direction, thereby affecting the testing accuracy of the attraction force of the permanent magnet to be tested. SUMMARY

[0005] The embodiment of the present disclosure provides a magnetic force measuring device of a permanent magnet, which can improve the accuracy of the attraction force test of the permanent magnet. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a magnetic force measuring device of a permanent magnet, which can improve the accuracy of the attraction force test of the permanent magnet. The technical solution is as follows:

[0007] In an implementation form of the embodiment of the present disclosure, the sliding rod comprises a connecting shaft and two sliding blocks, the two sliding blocks are respectively located at two ends of the connecting shaft, the area of the radial section of the sliding block is smaller than the area of the radial section of the connecting shaft, the sliding block is inserted into the guide groove, and the end surface of the connecting shaft abuts against the surface of the guide column.

[0008] In another implementation form of the embodiment of the present disclosure, the cross-sectional shape of the radial section of the connecting shaft is a waist circle shape; the connecting support comprises a connecting ear plate, the plate surface of the connecting ear plate has a connecting hole, the connecting hole is in the shape of a waist circle, the connecting ear plate is sleeved on the connecting shaft through the connecting hole, and the inner wall of the connecting hole abuts against the outer peripheral wall of the connecting shaft.

[0009] In another implementation form of the embodiment of the present disclosure, the connecting support comprises two connecting ear plates and a connecting side plate, the two connecting ear plates are arranged in parallel, and the opposite two side edges of the connecting side plate are respectively connected with the opposite side surfaces of the two connecting ear plates; the middle part of the connecting shaft is provided with a radially extending stop protrusion, the two connecting ear plates are sleeved outside the connecting shaft and are respectively located on the two sides of the stop protrusion, the axial length of the stop protrusion is the same as the spacing between the two connecting ear plates, and the stop protrusion is connected with the driving assembly.

[0010] In another implementation form of the embodiment of the present disclosure, the connecting support further comprises a support plate and a tension sensor, one side edge of the support plate is connected with the connecting side plate, and the support plate and the connecting ear plate are located on the two sides of the connecting side plate; the tension sensor is located on the plate surface of the support plate and away from the side of the connecting side plate, and the tension sensor is used to be connected with a to-be-measured permanent magnet.

[0011] In another implementation form of the embodiment of the present disclosure, the connecting support further comprises a reinforcing rib, the reinforcing rib is located on the plate surface of the support plate and connected with the connecting side plate.

[0012] In another implementation form of the embodiment of the present disclosure, the driving assembly comprises a turbine, a worm, a lead screw and a driving piece; the turbine is engaged with the worm, the turbine has an inner hole provided with an internal thread, the turbine is sleeved outside the lead screw through the inner hole, and the inner hole is threadedly connected with the lead screw, one end of the lead screw is connected with the sliding rod, and the driving piece is used to drive the worm to rotate.

[0013] In another implementation form of the embodiment of the present disclosure, the driving assembly further comprises an encoder, the encoder is installed at one end of the worm, and the encoder is used to measure the rotating speed of the worm.

[0014] In another implementation manner of the embodiment of the present disclosure, the driving member comprises a hydraulic motor, an output shaft of the hydraulic motor is in transmission connection with the turbine; the driving assembly further comprises a hydraulic pump, a hydraulic valve and an oil tank, an oil inlet of the hydraulic pump is in communication with the oil tank, an oil outlet of the hydraulic pump is in communication with an oil inlet of the hydraulic motor, an oil outlet of the hydraulic motor is in communication with the oil tank, and the hydraulic valve is connected on an oil path between the oil outlet of the hydraulic pump and the oil inlet of the hydraulic motor.

[0015] In another implementation manner of the embodiment of the present disclosure, opposite sides of the two guide columns are provided with scale marks, and the scale marks extend along the length direction of the guide columns.

[0016] The technical scheme provided by the embodiment of the present disclosure has at least the following beneficial effects:

[0017] In the magnetic force measuring device of the permanent magnet provided by the embodiment of the present disclosure, the guide frame comprises two parallel guide columns, opposite sides of the guide columns are provided with guide grooves, and two ends of the sliding rod can be respectively and slidably arranged in the two guide grooves. Since the opposite two sides of the end of the sliding rod are respectively attached to the opposite two side walls of the guide groove, when the sliding rod slides in the guide groove, the sliding rod cannot rotate under the limitation of the sliding groove, and the sliding rod can only move along the extension direction of the guide groove. Since the sliding rod is used to be connected with the connecting bracket, and the connecting bracket is used to mount the permanent magnet to be measured, during the process that the sliding rod is driven by the driving assembly to move along the guide groove, the sliding rod can carry the permanent magnet to be measured to move along the extension direction of the guide groove, and the moving direction cannot be skewed.

[0018] Compared with the related art, the embodiment of the present disclosure can control the permanent magnet to be measured to move along the specified direction without skewing only by using a single driving assembly, thereby greatly reducing the preparation cost of the magnetic force measuring device, and without affecting the test accuracy of the adsorption force due to the skewing of the moving direction of the permanent magnet to be measured; and when the single driving assembly drives the movement of the permanent magnet to be measured, it is not necessary to consider whether multiple driving assemblies are synchronously driven, thereby without the need of precisely controlling the synchronous actions of the driving assemblies, and the difficulty of controlling the work of the driving assembly can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0020] Figure 1 is a structural schematic diagram of a magnetic force measuring device of a permanent magnet provided by the embodiment of the present disclosure;

[0021] Figure 2 is a structural schematic diagram of a magnetic force measuring device of a permanent magnet provided by an embodiment of the present disclosure;

[0022] Figure 3 is a structural schematic diagram of a sliding rod provided by an embodiment of the present disclosure;

[0023] Figure 4 is a structural schematic diagram of a connecting support provided by an embodiment of the present disclosure;

[0024] Figure 5 is a partial sectional view of a magnetic force measuring device of a permanent magnet provided by an embodiment of the present disclosure.

[0025] The following marks in the drawings are explained as follows:

[0026] 10, guide frame; 11, guide column; 12, guide groove;

[0027] 20, sliding rod; 21, connecting shaft; 22, sliding block; 23, stop protrusion;

[0028] 30, connecting support; 31, connecting ear plate; 310, connecting hole; 32, connecting side plate; 33, support plate; 34, tension sensor; 35, reinforcing rib;

[0029] 40, permanent magnet to be measured; 41, attraction part;

[0030] 51, turbine; 52, worm; 53, screw rod; 54, driving part; 55, encoder; 56, hydraulic pump; 57, hydraulic valve. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present disclosure clearer, the following will make further detailed description on the embodiments of the present disclosure in combination with the drawings.

[0032] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", "third", and the like, as used in the description and the claims herein, do not have any specific meaning, and are used only to distinguish one component from another. Also, the terms "a" and "an" do not mean "one and only one", but rather "one or more". The terms "including", "containing", and the like, mean that elements or objects listed thereafter are included in the list of elements or objects and do not preclude other elements or objects not expressly listed. The terms "connected" and "coupled" do not mean that the elements or objects are directly connected or coupled together, but rather that the elements or objects are connected or coupled together through one or more intermediate elements or objects. The terms "top", "bottom", "left", "right", "front", "back", and the like, are used only to describe relative positions of the objects described herein, and can change when the absolute positions of the objects are changed.

[0033] Figure 1 is a structural schematic diagram of a magnetic force measuring device of a permanent magnet provided by an embodiment of the present disclosure; Figure 2 is a structural schematic diagram of a magnetic force measuring device of a permanent magnet provided by an embodiment of the present disclosure. Figure 1 and Figure 2 are axonometric views of a magnetic force measuring device of a permanent magnet, and Figure 1 and Figure 2 are axonometric views of a magnetic force measuring device of a permanent magnet from two opposite directions of the magnetic force measuring device. That is, Figure 1 schematically shows a front structure of a magnetic force measuring device, Figure 2 schematically shows a back structure of a magnetic force measuring device.

[0034] As shown in Figure 1 , 2 , the magnetic force measuring device comprises a guide frame 10, a sliding rod 20, a connecting bracket 30, and a driving assembly.

[0035] As shown in Figure 1 , 2 , the guide frame 10 comprises two guide columns 11 which are parallel to each other, and the opposite sides of the two guide columns 11 have guide grooves 12 extending along the length direction of the guide columns 11.

[0036] As shown in Figure 1 , 2As shown, the two ends of the sliding rod 20 are respectively inserted into the guide grooves 12 of the two guide columns 11, and the opposite two side surfaces of the end of the sliding rod 20 are respectively attached to the opposite two side walls of the guide groove 12. The connecting bracket 30 is connected to the sliding rod 20 and is located between the two ends of the sliding rod 20. The connecting bracket 30 is used to install the measured permanent magnet 40.

[0037] The driving assembly is connected to the sliding rod 20 and is used to drive the sliding rod 20 to reciprocatingly move along the guide groove 12.

[0038] In the magnetic force measuring device of the permanent magnet provided by the embodiment of the present disclosure, the guide frame 10 includes two parallel guide columns 11, the opposite side surfaces of the guide column 11 are provided with the guide groove 12, and the two ends of the sliding rod 20 can be respectively and slidably arranged in the two guide grooves 12. Since the opposite two side surfaces of the end of the sliding rod 20 are respectively attached to the opposite two side walls of the guide groove 12, when the sliding rod 20 slides in the guide groove 12, the sliding rod 20 cannot rotate under the limitation of the sliding groove, and the sliding rod 20 can only move along the extension direction of the guide groove 12. Since the sliding rod 20 is used to be connected to the connecting bracket 30, and the connecting bracket 30 is used to install the measured permanent magnet 40, during the process that the sliding rod 20 is driven by the driving assembly to move along the guide groove 12, the sliding rod 20 can carry the measured permanent magnet 40 to move along the extension direction of the guide groove 12, and the moving direction cannot be skewed.

[0039] Compared with the related art, the embodiment of the present disclosure can control the measured permanent magnet 40 to move along the specified direction and cannot be skewed by using only a single driving assembly, so that the preparation cost of the magnetic force measuring device can be greatly reduced, and the test accuracy of the adsorption force cannot be affected due to the skewing of the moving direction of the measured permanent magnet 40. When the single driving assembly drives the movement of the measured permanent magnet 40, it is not necessary to consider whether multiple driving assemblies are synchronously driven, so that it is not necessary to precisely control the synchronous action of each driving assembly, and the difficulty of controlling the work of the driving assembly can be reduced.

[0040] Optionally, as shown in the figure, the adsorption part 41 for the measured permanent magnet 40 to be adsorbed is arranged below the measured permanent magnet 40. Figure 1

[0041] Before measurement, the measured permanent magnet 40 is adsorbed with the adsorption part 41, the measured permanent magnet 40 is moved by the sliding rod 20, and the measured permanent magnet 40 is separated from the adsorption part 41. During this period, the adsorption force between the measured permanent magnet 40 and the adsorption part 41 and the distance between the measured permanent magnet 40 and the adsorption part 41 are obtained, so as to determine the relationship between the adsorption force and the distance between the measured permanent magnet 40 and the adsorption part 41, so that the technician can accurately understand the corresponding adsorption force between the permanent magnet and the adsorption part 41 at different distances.​

[0042] Figure 3 is a structural schematic diagram of a sliding rod 20 provided by an embodiment of the present disclosure. As shown in Figure 3 , the sliding rod 20 comprises a connecting shaft 21 and two sliding blocks 22, the two sliding blocks 22 are respectively located at two ends of the connecting shaft 21, and the area of the radial section of the sliding block 22 is smaller than the area of the radial section of the connecting shaft 21.

[0043] Exemplarily, the radial section of the sliding block 22 refers to the section of the sliding block 22 in the direction perpendicular to the axis of the connecting shaft 21.

[0044] Exemplarily, the radial section of the connecting shaft 21 refers to the section in the direction perpendicular to the axis of the connecting shaft 21.

[0045] As shown in Figure 1 , 2 , the sliding block 22 is inserted into the guide groove 12, and the end surface of the connecting shaft 21 abuts against the surface of the guide column 11.

[0046] In the embodiment of the present disclosure, the area of the radial section of the sliding block 22 is smaller than the area of the radial section of the connecting shaft 21, so that after the sliding block 22 is inserted into the guide groove 12, the end surface of the connecting shaft 21 abuts against the surface of the guide column 11 to prevent the connecting shaft 21 from also being inserted into the guide groove 12; at the same time, by abutting against the surfaces of the two guide columns 11 at two ends of the connecting shaft 21, the problem of axial movement of the sliding rod 20 after being installed on the guide column 11 is prevented.

[0047] Exemplarily, the axial length of the sliding block 22 is smaller than the groove depth of the guide groove 12.

[0048] In this way, after the sliding rod 20 is installed on the guide column 11, only two opposite side surfaces of the sliding block 22 are in contact with the groove wall of the guide groove 12, and the sliding block 22 is not in contact with the groove bottom of the guide groove 12. Since only two surfaces of the sliding block 22 are in contact with the guide groove 12, compared with three surfaces of the sliding block 22 being in contact with the guide groove 12, the friction between the sliding block 22 and the guide groove 12 can be effectively reduced.

[0049] Exemplarily, the side surface of the sliding block 22 in contact with the guide groove 12 has a plurality of grooves, and the plurality of grooves are arranged at intervals. The side surface of the sliding block 22 is coated with lubricating grease, and the lubricating grease is filled in the grooves.

[0050] By roughening the side surface of the sliding block 22, the lubricating grease can be more stably attached to the side surface of the sliding block 22 to avoid the lubricating grease from being easily lost. By providing the lubricating grease on the side surface of the sliding block 22, the friction between the sliding block 22 and the guide groove 12 can be reduced, and the resistance of the guide groove 12 to the sliding block 22 is prevented from being too large to affect the tension detected by the tension sensor 34.

[0051] For example, the side of the sliding block 22 that fits against the guide groove 12 is provided with a groove, and a roller or ball is installed in the groove.

[0052] By using rollers or balls to contact the groove wall of the guide groove 12, the sliding friction between the sliding block 22 and the guide groove 12 can be converted into rolling friction, thereby reducing the friction between the sliding block 22 and the guide groove 12.

[0053] Optionally, such as Figure 3 As shown, the radial section of the connecting shaft 21 has an oval shape.

[0054] Figure 4 This is a schematic diagram of the structure of a connecting bracket 30 provided in an embodiment of this disclosure. Figure 4 As shown, the connecting bracket 30 includes a connecting ear plate 31, and the surface of the connecting ear plate 31 has a connecting hole 310, which is oval in shape.

[0055] like Figure 1 , 2 As shown, the connecting ear plate 31 is sleeved on the connecting shaft 21 through the connecting hole 310, and the inner wall of the connecting hole 310 is in contact with the outer peripheral wall of the connecting shaft 21.

[0056] In this embodiment, the connecting shaft 21 is inserted into the connecting hole 310 of the connecting lug 31. Since both the cross-sectional shape of the connecting shaft 21 and the shape of the connecting hole 310 are oval, and the inner wall of the connecting hole 310 fits against the outer peripheral wall of the connecting shaft 21, the connecting lug 31 will not rotate relative to the connecting shaft 21. This prevents the permanent magnet 40 connected to the connecting lug 31 from rotating around the connecting shaft 21.

[0057] Optionally, such as Figure 4 As shown, the connecting bracket 30 includes two connecting ear plates 31 and a connecting side plate 32. The two connecting ear plates 31 are arranged in parallel, and the opposite sides of the connecting side plate 32 are respectively connected to the opposite sides of the two connecting ear plates 31.

[0058] like Figure 3 As shown, the connecting shaft 21 has a radially extending stop protrusion 23 in the middle.

[0059] like Figure 1 , 2 As shown, two connecting lugs 31 are sleeved on the outside of the connecting shaft 21, and the two connecting lugs 31 are located on both sides of the stop protrusion 23.

[0060] The axial length of the stop protrusion 23 is the same as the distance between the two connecting lugs 31, and the stop protrusion 23 is connected to the drive assembly.

[0061] In the embodiments of the present disclosure, the two connecting lug plates 31 and the connecting side plate 32 form a U-shaped structure, the U-shaped structure is sleeved outside the connecting shaft 21, and the two connecting lug plates 31 of the U-shaped structure are clamped on the stop protrusion 23, the stop protrusion 23 abuts against the plate surface of the connecting lug plate 31, so that the U-shaped structure cannot slide axially on the connecting shaft 21, thereby avoiding that when the adsorption force of the test permanent magnet 40 is tested, the test permanent magnet 40 moves along the axial direction of the connecting shaft 21, and the measurement accuracy of the adsorption force is affected.

[0062] Optionally, one of the two connecting lug plates 31 is detachably connected with the connecting side plate 32, so as to facilitate the installation of the two connecting lug plates 31 on both sides of the stop protrusion 23.

[0063] Exemplarily, the connecting lug plate 31 is connected with the connecting side plate 32 by a bolt.

[0064] Exemplarily, the connecting lug plate 31 is connected with the connecting side plate 32 by a screw.

[0065] Optionally, as shown in Figure 1 , 2 , the connecting bracket 30 further comprises a support plate 33 and a tension sensor 34, one side of the support plate 33 is connected with the connecting side plate 32, and the support plate 33 and the connecting lug plate 31 are located on both sides of the connecting side plate 32.

[0066] As shown in Figure 1 , 2 , the tension sensor 34 is located on the plate surface of the support plate 33, and the tension sensor 34 is away from the connecting side plate 32, and the tension sensor 34 is used to be connected with the test permanent magnet 40.

[0067] The support plate 33 is connected with the connecting side plate 32 of the U-shaped structure, and the installation position of the tension sensor 34 is away from the U-shaped structure, so that there is enough space on the connecting bracket 30 to install the tension sensor 34, and the tension sensor 34 is prevented from colliding with other components when the U-shaped structure rises and falls with the sliding rod 20.

[0068] Exemplarily, as shown in Figure 1 , 2 , a screw hole is arranged on the side of the support plate 33 away from the connecting side plate 32, a bolt is arranged on the tension sensor 34, and the tension sensor 34 is threadedly connected with the screw hole by the bolt, so as to detachably connect the tension sensor 34 and the support plate 33 together.

[0069] Optionally, as shown in Figure 4 , the connecting bracket 30 further comprises a reinforcing rib 35, the reinforcing rib 35 is located on the plate surface of the support plate 33, and the reinforcing rib 35 is connected with the connecting side plate 32.

[0070] Exemplarily, as shown in Figure 4As shown, the opposite two plate surfaces of the support plate 33 are provided with reinforcing ribs 35, which connect the support plate 33 and the connecting side plate 32, and can enhance the connection reliability of the support plate 33 and the connecting side plate 32.

[0071] As an example, a through hole can be formed in the reinforcing rib 35 to reduce the weight of the connection, so as to achieve the purpose of lightweight design and reduce the load of the driving assembly.

[0072] Figure 5 is a partial sectional view of a magnetic force measuring device of a permanent magnet provided by an embodiment of the present disclosure. As shown in the figure, Figure 5 The driving assembly includes a turbine 51, a worm 52, a lead screw 53, and a driving member 54.

[0073] As shown in the figure, Figure 5 The turbine 51 is engaged with the worm 52, the turbine 51 has an inner hole provided with an internal thread, the turbine 51 is sleeved outside the lead screw 53 through the inner hole, and the inner hole is threadedly connected with the lead screw 53. One end of the lead screw 53 is connected with the sliding rod 20, and the driving member 54 is used to drive the worm 52 to rotate.

[0074] In the above implementation manner, the driving member 54 can drive the worm 52 to rotate, the turbine 51 is engaged with the worm 52, and the worm 52 drives the turbine 51 to rotate. The inner hole of the turbine 51 is threadedly connected with the lead screw 53, so that when the turbine 51 rotates, the lead screw 53 moves along the axial direction of the lead screw 53 under the action of the screw pair. Since the lead screw 53 is connected with the sliding rod 20, the lead screw 53 can drive the sliding rod 20 to move along the axial direction of the lead screw 53.

[0075] Optionally, as shown in the figure, Figure 1 The driving assembly further includes an encoder 55, the encoder 55 is installed at one end of the turbine 51, and the encoder 55 is used to measure the rotating speed of the worm 52.

[0076] In the embodiment of the present disclosure, the encoder 55 is installed at one end of the worm 52, and the encoder 55 can measure the angular displacement of the worm 52, so as to measure the rotating speed of the worm 52.

[0077] Optionally, the magnetic force measuring device further includes a controller, the controller is electrically connected with the encoder 55 and the tension sensor 34 respectively. The controller can acquire the rotating speed of the worm 52 detected by the encoder 55 and the tension detected by the tension sensor 34.

[0078] After acquiring the rotating speed of the worm 52, the controller determines the current displacement of the lead screw based on the following formula (1).

[0079] L=n×m×t / I (1)

[0080] In formula (1), L is the displacement of the screw rod 53, in mm; I is the transmission ratio of the worm 52 and the worm gear, and the transmission ratio of the worm gear and the worm 52 in the embodiment of the present disclosure is 1; m is the pitch, in mm / r; t is the movement time of the screw rod, in min; and n is the rotation speed of the worm 52, in r / min.

[0081] Meanwhile, the controller can also synchronously acquire the tension of the tension sensor 34, so that the relationship between the adsorption distance and the adsorption force between the permanent magnet 40 and the attraction part 41 can be determined based on the displacement of the screw rod and the tension of the tension sensor 34. In this way, the technical personnel can understand the corresponding adsorption force between the permanent magnet and the attraction part 41 at different distances.

[0082] The controller determines the relationship between the adsorption distance and the adsorption force as follows:

[0083] Firstly, the adsorption distance between the permanent magnet 40 and the attraction part 41 when the adsorption force is 0 is determined, and a first adsorption distance is obtained.

[0084] Then, the adsorption force between the permanent magnet 40 and the attraction part 41 when the permanent magnet 40 and the attraction part 41 just start to separate is determined, and a first adsorption force is obtained.

[0085] Next, the first adsorption distance is equally divided into n parts, where n is a positive integer and n is greater than or equal to 2.

[0086] Then, after the permanent magnet 40 and the attraction part 41 just start to separate, the adsorption force between the permanent magnet 40 and the attraction part 41 is acquired once every time the distance between the permanent magnet 40 and the attraction part 41 is increased by n equal parts of the first adsorption distance, until the distance between the permanent magnet 40 and the attraction part 41 is the first adsorption distance.

[0087] Finally, the relationship between the adsorption distance and the adsorption force is determined according to the acquired adsorption force and adsorption distance.

[0088] When considering which permanent magnet adsorption equipment to choose, the adsorption force that can be generated by the permanent magnet needs to be considered to ensure that the equipment can be adsorbed at the set position without falling off.

[0089] Optionally, an adjustment coefficient can be determined, and the product of the adjustment coefficient and the first adsorption force of different permanent magnets is taken as the reliable adsorption force of the permanent magnet.

[0090] For example, the adjustment coefficient can be 0.6. After the first adsorption force of the permanent magnet is multiplied by the adjustment coefficient, it is reduced to a certain extent, so as long as the reliable adsorption force of the permanent magnet exceeds the required adsorption force of the adsorption equipment, it can be indicated that the permanent magnet can meet the adsorption demand of the equipment.

[0091] Optionally, as shown in Figure 1 、 2 , the driving member 54 comprises a hydraulic motor, and an output shaft of the hydraulic motor is in transmission connection with the turbine 51.

[0092] The driving assembly further comprises a hydraulic pump 56, a hydraulic valve 57 and an oil tank, an oil inlet of the hydraulic pump 56 is in communication with the oil tank, an oil outlet of the hydraulic pump 56 is in communication with an oil inlet of the hydraulic motor, an oil outlet of the hydraulic motor is in communication with the oil tank, and the hydraulic valve 57 is connected to an oil circuit between the oil outlet of the hydraulic pump 56 and the oil inlet of the hydraulic motor.

[0093] Exemplarily, the hydraulic valve 57 can be a proportional control valve.

[0094] In the embodiment of the present disclosure, by arranging the hydraulic valve 57 on the oil circuit between the oil outlet of the hydraulic pump 56 and the oil inlet of the hydraulic motor, the hydraulic oil flow entering the hydraulic motor can be controlled accurately, and the speed of the hydraulic motor can be controlled accurately. The hydraulic motor can control the screw to lift at different speeds, so that the permanent magnet 40 to be measured can gradually separate from the suction part 41 at a reasonable speed.

[0095] Optionally, the opposite side surfaces of the two guide columns 11 are provided with scale marks, and the scale marks extend along the length direction of the guide column 11.

[0096] The scale marks are used for indicating the length size, and the moving distance of the sliding rod 20 can be observed manually by technicians by using the scale mark technology. In this way, when the encoder 55 is damaged, the moving distance of the sliding rod 20 can be detected by observing the scale marks, and the reliability of the magnetic force measuring device is improved.

[0097] The above is not any form of limitation on the present disclosure, although the present disclosure has been disclosed as above through the embodiments, however, it is not used to limit the present disclosure, any person skilled in the art, without departing from the technical solution range of the present disclosure, can make some changes or modifications to the above disclosed technical content for equivalent embodiments, as long as it does not deviate from the technical solution of the present disclosure, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present disclosure, all still belong to the range of the technical solution of the present disclosure.

Claims

1. A magnetic force measuring device of a permanent magnet, characterized by, The magnetic force measuring device comprises a guide frame (10), a sliding rod (20), a connecting bracket (30) and a driving assembly; The guide frame (10) comprises two guide columns (11) arranged in parallel and vertically, and opposite sides of the two guide columns (11) are provided with guide grooves (12) extending along the length direction of the guide columns (11); Two ends of the sliding rod (20) are respectively inserted into the guide grooves (12) of the two guide columns (11), and opposite sides of the end of the sliding rod (20) are respectively attached to the opposite two side walls of the guide grooves (12), the connecting bracket (30) is connected with the sliding rod (20) and located between the two ends of the sliding rod (20), and the connecting bracket (30) is used for mounting a permanent magnet (40) to be measured; The driving assembly is connected with the sliding rod (20), and the driving assembly is used for driving the sliding rod (20) to reciprocate along the guide grooves (12); the sliding rod (20) comprises a connecting shaft (21) and two sliding blocks (22); The connecting bracket (30) comprises a connecting lug plate (31), a plate surface of the connecting lug plate (31) is provided with a connecting hole (310), the connecting hole (310) is in the shape of a waist circle, the connecting lug plate (31) is sleeved on the connecting shaft (21) through the connecting hole (310), and the inner wall of the connecting hole (310) is attached to the outer peripheral wall of the connecting shaft (21); The connecting bracket (30) comprises two connecting lug plates (31) and a connecting side plate (32), the two connecting lug plates (31) are arranged in parallel, and opposite two side edges of the connecting side plate (32) are connected with opposite sides of the two connecting lug plates (31); A radial stop protrusion (23) is arranged at the middle part of the connecting shaft (21), the two connecting lug plates (31) are sleeved outside the connecting shaft (21) and located at two sides of the stop protrusion (23) respectively, the axial length of the stop protrusion (23) is the same as the spacing between the two connecting lug plates (31), and the bottom of the stop protrusion (23) is connected with the driving assembly; The connecting bracket (30) further comprises a horizontally arranged support plate (33) and a tension sensor (34), one side edge of the support plate (33) is connected with the connecting side plate (32), and the support plate (33) and the connecting lug plate (31) are located at two sides of the connecting side plate (32); The tension sensor (34) is located on the bottom plate surface of the support plate (33) and away from one side of the connecting side plate (32), and the tension sensor (34) is used for being connected with the permanent magnet (40) to be measured.

2. The magnetic force measuring device according to claim 1, characterized in that The two sliding blocks (22) are respectively located at two ends of the connecting shaft (21), the area of the radial section of the sliding block (22) is smaller than the area of the radial section of the connecting shaft (21), the sliding block (22) is inserted into the guide groove (12), and the end surface of the connecting shaft (21) is abutted against the surface of the guide column (11).

3. The magnetic force measuring device of claim 2, wherein, The radial section of the connecting shaft (21) is in the shape of a waist circle.

4. The magnetic force measuring device of claim 1, wherein, The connecting support (30) further comprises a reinforcing rib (35) on the plate surface of the support plate (33) and connected with the connecting side plate (32).

5. The magnetic force measuring device according to any one of claims 1 to 4, characterized in that, The driving assembly comprises a turbine (51), a worm (52), a screw rod (53) and a driving member (54). The turbine (51) is engaged with the worm (52), the turbine (51) has an inner hole with internal threads, the turbine (51) is sleeved on the outer surface of the screw rod (53) through the inner hole, and the inner hole is threadedly connected with the screw rod (53), one end of the screw rod (53) is connected with the sliding rod (20), and the driving member (54) is used for driving the worm (52) to rotate.

6. The magnetic force measuring device of claim 5, wherein, The driving assembly further comprises an encoder (55) installed on one end of the worm (52), and the encoder (55) is used for measuring the rotating speed of the worm (52).

7. The magnetic force measuring device of claim 5, wherein, The driving member (54) comprises a hydraulic motor, and an output shaft of the hydraulic motor is in transmission connection with the turbine (51). The driving assembly further comprises a hydraulic pump (56), a hydraulic valve (57) and an oil tank, an oil inlet of the hydraulic pump (56) is in communication with the oil tank, an oil outlet of the hydraulic pump (56) is in communication with an oil inlet of the hydraulic motor, an oil outlet of the hydraulic motor is in communication with the oil tank, and the hydraulic valve (57) is connected on an oil circuit between the oil outlet of the hydraulic pump (56) and the oil inlet of the hydraulic motor.

8. The magnetic force measuring device according to any one of claims 1 to 4, characterized in that, The opposite sides of the two guide columns (11) are provided with scale marks extending along the length direction of the guide column (11).

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