A fast and stable deflection structure and its application in magnetic property detection

Abstract

The present invention discloses a rapidly stable deflection structure, comprising a deflection frame, a stabilizing component and a shell. The deflection frame comprises a circular top support, a circular bottom support and a hanging basket frame, an annular protrusion is arranged in the middle of the top support, the annular protrusion is located in the top opening of the shell and there is a gap with the top opening, and the top of the deflection frame deflects in the top opening of the shell. The stabilizing component comprises a bottom stabilizing component and a top stabilizing component. The deflection structure stabilizes the deflection frame by the bottom stabilizing component and the top stabilizing component, so that the bottom of the deflection structure is stable and the top deflects, and the top deflection quickly stabilizes at a specific position. The deflection structure is widely used in magnetic property detection. When the deflection structure is used to measure magnetic properties, the measurement method is simple, and efficient and rapid measurement of batch permanent magnets can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automated detection, in particular to a fast and stable deflection structure and its application in magnetic performance detection. Background Art

[0002] When evaluating the magnetic properties of an annular magnet, it is necessary to test the magnetic eccentricity, magnetic declination, magnetic pull and other parameters of the annular magnet. The magnetic declination of an annular magnet refers to the deflection between the ideal magnetization direction and the actual magnetization direction of the ring. It is caused by the non-parallel orientation direction of the product and the orientation magnetic field during the magnetic orientation molding process of the annular magnet.

[0003] The article "Research on the Measurement Method of Magnetic Declination of Permanent Magnets" (Metrology Technology 2014. No. 2, author: Hou Ruifen et al.) proposes to use a combination of a digital fluxmeter and a Helmholtz coil sample stage as a measuring device to accurately measure the magnetic declination of permanent magnets based on the open magnetic circuit magnetic moment measurement principle formed by the combination of a Helmholtz coil and a fluxmeter. This measurement method measures the magnetic flux in two directions to obtain the magnetic declination. The measurement method is cumbersome, the device is complex and the cost is high, and it is impossible to achieve efficient and rapid measurement of batches of permanent magnets.

[0004] The yaw structure refers to a structure that can swing under the action of external force and can stabilize at a certain position to offset the position. The ideal magnetization direction of the annular magnetic block is its axial direction, and the actual magnetization direction is the offset direction of the yaw structure under the action of the annular magnetic block. Therefore, the yaw structure plays an important role in magnetic declination detection.

[0005] The current deflection pendulum structure is similar to an inverted pendulum, with the bottom fixed and the top swinging. In the actual measurement process, the deflection structure will quickly deflect under the action of the annular magnetic block. Due to the instability of the deflection structure itself, it brings a lot of inconvenience and measurement errors to the actual measurement. Summary of the invention

[0006] The purpose of the present invention is to provide a deflection structure that can be quickly stabilized in view of the difficulties and errors caused by the instability of the deflection structure itself in the prior art. The deflection structure includes a deflection frame, a stabilizing component and a housing, and the stabilizing component includes a bottom stabilizing component and a top stabilizing component. The bottom of the deflection structure is fixed and the top can be quickly stabilized after deflection occurs.

[0007] Another object of the present invention is to provide a fast and stable deflection structure for use in magnetic performance detection.

[0008] The technical solution adopted to achieve the purpose of the present invention is:

[0009] A yaw structure capable of rapid stabilization comprises a yaw frame whose top is driven to generate yaw, a top stabilizing assembly for stabilizing the top of the yaw frame, a bottom stabilizing assembly for stabilizing the bottom of the yaw frame, and a fixing plate for fixing the yaw frame;

[0010] The deflection frame includes a circular top support, a circular bottom support coaxial with the top support and of the same size, and a hanging basket frame arranged between the top support and the bottom support, wherein the top support is provided with a driven part;

[0011] The bottom stabilizing assembly includes a base fixed to the bottom of the yaw frame, a centripetal spring group that balances and pulls the base to the periphery of the fixed plate, a support shaft fixed to the lower surface of the fixed plate, and a support shaft socket formed in the center of the base, and the end of the support shaft contacts the support shaft socket;

[0012] The top stabilizing assembly comprises a groove formed by an annular protrusion and used to fill damping oil, and a vertical rod fixed to the bottom of a positioning sleeve and extending into the groove but not contacting the bottom of the groove. The positioning sleeve is fixed to a fixed surface.

[0013] In the above technical solution, the deflection structure also includes a shell, the annular protrusion is located in the top opening of the shell and there is a gap with the top opening, the fixing surface is formed on the top of the shell, the fixing plate is a three-pronged plate, and the three-pronged plate is fixed to the bottom of the shell by three columns.

[0014] In the above technical solution, the centripetal spring group includes three springs of the same material and length, and the three springs are axially symmetrically arranged.

[0015] In the above technical solution, three earrings are respectively fixed below the edge of the three-pronged plate, one end of each spring is fixed to the earring, and the other end is fixed to the base.

[0016] In the above technical solution, the hanging basket frame is three evenly distributed support rods.

[0017] In the above technical solution, the support rod and the jacking support are fixed by means of set screws.

[0018] In the above technical solution, the base is fixed to the upper surface of the base by a fixing nut.

[0019] In the above technical solution, the support shaft includes a large support shaft fixed to the lower surface of the fixing plate and a small support shaft in contact with the support shaft socket, and the small support shaft is fixed to the bottom of the large support shaft.

[0020] In the above technical solution, the shell includes an upper end cover, a lower end cover and a sleeve, the top opening is located in the middle of the upper end cover, and the column is fixed on the lower end cover.

[0021] In the above technical solution, a door is provided on the side wall of the sleeve.

[0022] The above-mentioned fast and stable deflection structure is used in magnetic performance detection, and a magnetic conductive ring for providing deflection driving force is fixed to the outer edge of the annular protrusion.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The rapidly stabilized yaw structure provided by the present invention stabilizes the yaw frame through a bottom stabilizing component and a top stabilizing component, so that the bottom of the yaw structure is stable and the top yaws, and the top yaws rapidly and stabilizes at a specific position.

[0025] 2. The fast and stable deflection structure provided by the present invention is widely used in magnetic property detection. When the deflection structure is used to measure magnetic properties, the measurement method is simple and efficient and fast measurement of batch permanent magnets can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic structural diagram of a deflection structure that can be quickly stabilized.

[0027] Figure 2 Shown is a partial view of the application device of the pendulum structure in measuring magnetic eccentricity and magnetic declination.

[0028] Figure 3 Shown is a partial view of an application device of a deflection pendulum structure in measuring magnetic tension.

[0029] In the figure: 1-top support, 2-bottom support, 3-hanging basket, 4-annular protrusion, 5-base, 6-fixed plate, 7-support shaft, 7-1-support large shaft, 7-2-support small shaft, 8-support shaft socket, 9-damping oil, 10-positioning sleeve, 11-vertical rod, 12-column, 13-spring, 14-upper end cover, 15-lower end cover, 16-sleeve, 17-earring, 18-fixing nut, 19-setting screw, 20-door, 21-magnetic ring, 22-force sensor, 23-probe seat, 26-photosensitive chip, 30-laser. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Example 1

[0032] A yaw structure capable of rapid stabilization comprises a yaw frame, a stabilizing component and a housing;

[0033] The deflection frame includes a circular top support 1, a circular bottom support 2 coaxial with the top support 1 and of the same size, and a hanging basket frame 3 arranged between the top support 1 and the bottom support 2. An annular protrusion 4 is arranged in the middle of the top support 1. The annular protrusion 4 is located in the top opening of the shell and there is a gap with the top opening. The top of the deflection frame deflects in the top opening of the shell.

[0034] The stabilizing assembly includes a bottom stabilizing assembly and a top stabilizing assembly;

[0035] The bottom stabilizing assembly includes a base 5 fixed to the bottom of the yaw frame, a fixing plate 6 fixed to the bottom of the housing, a centripetal spring group that balances and pulls the base 5 to the periphery of the fixing plate 6, a support shaft 7 fixed to the lower surface of the fixing plate 6, and a support shaft socket 8 formed at the center of the base 5, and the end of the support shaft 7 is in contact with the support shaft socket 8;

[0036] The top stabilizing assembly includes a groove formed by the annular protrusion 4 for filling the damping oil 9 and a vertical rod 11 fixed to the bottom of the positioning sleeve 10 and extending into the groove but not contacting the bottom of the groove. The positioning sleeve 10 is fixed in the top opening of the shell.

[0037] When the deflection structure is in a natural state, that is, when no deflection occurs, the vertical direction is maintained under the action of the centripetal spring group. The centripetal spring group provides an upward pulling force to the deflection structure as a whole, and the pulling force is balanced with the overall gravity of the deflection structure. When the deflection structure is under the action of an external force, the support shaft 7 provides a point-contact lower support for the deflection structure, which can ensure that the deflection structure can use the contact point between it and the lower support as a fulcrum, and under the action of an external force, like an inverted simple pendulum, presents a radial deflection along the direction of the external force.

[0038] At the moment of external force, the deflection structure swings instantaneously. After the deflection occurs, due to inertia, the unstable deflection structure will shake. In order to ensure the rapid stabilization of the deflection structure during measurement, alleviate the fluctuation of the deflection structure during measurement, and make the measurement stable, the deflection structure also includes a top stabilization component. The top stabilization component includes a groove for filling the damping oil 9 formed by the annular protrusion 41 and a vertical rod 11 fixed to the bottom of the positioning sleeve 10 and extending into the groove but not contacting the bottom of the groove. The vertical rod 11 forms damping with the damping oil 9, and the vertical rod 11 does not contact the bottom of the groove, reserving space for the upward movement of the deflection structure. The damping oil is composed of a special component with a flexible blocking effect, which can reduce the shaking of the deflection structure and promote its stabilization as soon as possible, thereby improving the measurement efficiency.

[0039] Example 2

[0040] This embodiment introduces the preferred structure based on the embodiment 1.

[0041] As a preferred embodiment, the fixing plate 6 is a three-pronged plate, and the three-pronged plate is fixed to the bottom of the housing through three columns 12.

[0042] As a preferred embodiment, the centripetal spring group includes three springs 13 of the same material and length, and the three springs are symmetrically arranged. In order to avoid the influence of the mass error that may exist in the processing of the unbalanced mass of the pendulum structure itself on the pendulum structure, the pendulum structure is constrained by three centripetal spring groups that are evenly distributed and have the same stiffness size through structural design, so as to avoid arbitrary rotation of the pendulum structure. Similarly, the constraining effect of the centripetal spring group on the pendulum structure can be used to avoid the influence of the pendulum structure under the impact of external force. In addition, by virtue of the constraining effect of the centripetal spring group on the pendulum structure, when the measured pendulum structure is evacuated after the measurement is completed, it can also maintain balance with the overall gravity of the pendulum structure to achieve the acceptance of the pendulum structure, thereby ensuring reliable and efficient measurement.

[0043] As a preferred embodiment, three earrings 17 are fixed below the edge of the three-pronged plate, and one end of each spring 13 is fixed to the earring 17 , and the other end is fixed to the base 5 .

[0044] As a preferred embodiment, the hanging basket frame 3 is composed of three evenly distributed support rods. The support rods are fixed to the top support 1 by set screws 19. The hanging basket frame 7 composed of three support rods can be deformed so that the top of the deflection structure is offset while the bottom remains stable.

[0045] As a preferred embodiment, the base 5 is fixed to the upper surface of the base 2 by a fixing nut 18 .

[0046] As a preferred embodiment, the support shaft 7 includes a large support shaft 7-1 fixed to the lower surface of the fixing plate 6 and a small support shaft 7-2 in contact with the support shaft socket 8, and the small support shaft 7-2 is fixed to the bottom of the large support shaft 7-1. The large support shaft 7-1 ensures sufficient support force to prevent the support shaft 7 from breaking under a large external force, and the small support shaft 7-2 ensures a close fit with the support shaft socket.

[0047] As a preferred embodiment, the housing includes an upper end cover 14 , a lower end cover 15 and a sleeve 16 , the top opening is located in the middle of the upper end cover 14 , and the column 12 is fixed on the lower end cover 15 .

[0048] As a preferred embodiment, a door 20 is provided on the side wall of the sleeve 16, and opening the door allows for convenient maintenance of internal components.

[0049] Example 3

[0050] This embodiment introduces the application in magnetic property detection based on the embodiments 1 and 2.

[0051] The outer edge of the annular protrusion 4 is fixed with a magnetic ring 21 for providing a yaw driving force. The magnetic ring 21 is attracted by the annular magnetic block to drive the top of the yaw frame to yaw, and is combined with a magnetic eccentricity detection component or a magnetic tension detection component to measure the magnetic properties of the annular magnetic block.

[0052] like Figure 2 As shown, the magnetic eccentricity detection component is an optical positioning measurement component or a laser positioning measurement component. Taking the laser positioning measurement component as an example, the magnetic eccentricity magnetic deflection detection component includes a photosensitive chip 26 fixed to the lower surface of the top of the deflection frame and a laser 30 fixed inside the housing.

[0053] The magnetic ring 21 is attracted by the annular magnetic block to be measured, driving the top of the deflection frame to deflect in the gap, driving the photosensitive chip 26 fixed to the lower surface of the top of the deflection frame to swing. The photosensitive chip 26 receives the laser beam emitted by the laser 30 to sense the digital information, and transmits the information to the processor connected to it, and obtains the radial position of the center of the deflection structure relative to the geometric center of the magnetic steel assembly under the action of the permanent magnet magnetic field, and the phase angle corresponding to the position point, thereby easily and quickly obtaining the magnetic eccentricity and magnetic declination of the annular magnetic block to be measured, and displaying them on the industrial computer, and automatically storing the measured values.

[0054] like Figure 3 As shown, the magnetic tension detection assembly includes a force sensor 22 fixed below the fixed plate and a probe seat 23 fixed at the bottom of the force sensor 22, the probe of the force sensor 22 is coaxially arranged with the magnetic ring 21 and the bottom is inserted into the probe seat 23, wherein the support shaft 7 is fixed below the probe seat 23.

[0055] In addition, a positioning component for positioning the annular magnetic block to be measured is provided on the top of the shell to ensure that the annular magnetic block to be measured maintains a coaxial center with the deflection structure in the initial state, thereby avoiding measurement errors and improving measurement accuracy.

[0056] When the deflection structure is in a natural state, the force sensor returns to zero. After the annular magnetic block to be tested is placed on the positioning assembly and positioned, the annular magnetic block applies an upward magnetic pulling force to the magnetic ring 21, driving the deflection structure to move upward. Under the vertical upward pulling action of the symmetrical spring group, the central axis socket at the bottom of the deflection structure and the support shaft on the force sensor form an axis socket match, and apply axial pressure to the force sensor 22. The force sensor 22 measures the pressure as the magnetic pulling force of the annular magnetic block to be tested. The force sensor 22 is connected to the processor (i.e., the industrial computer) for communication, and the processor receives the signal of the force sensor and displays the magnetic pulling force value.

[0057] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the elements described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0058] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fast and stable deflection structure, characterized in that: It comprises a yaw frame whose top is driven to produce yaw, a top stabilizing component for stabilizing the top of the yaw frame, a bottom stabilizing component for stabilizing the bottom of the yaw frame, and a fixing plate (6) for fixing the yaw frame; The deflection frame comprises a circular top support (1), a circular bottom support (2) coaxial with the top support (1) and of the same size, and a hanging basket frame (3) arranged between the top support (1) and the bottom support (2); the top support (1) is provided with a driven part; The bottom stabilizing assembly comprises a base (5) fixed at the bottom of the yaw frame, a centripetal spring group for balancing and pulling the base (5) to be fixed to the outer periphery of the fixing plate (6), a support shaft (7) fixed to the lower surface of the fixing plate (6), and a support shaft socket (8) formed at the center of the base (5), wherein the end of the support shaft (7) is in contact with the support shaft socket (8); The top stabilizing assembly comprises a groove formed by an annular protrusion (4) for filling damping oil (9) and a vertical rod (11) fixed to the bottom of a positioning sleeve (10) and extending into the groove but not contacting the bottom of the groove. The positioning sleeve (10) is fixed to a fixed surface.

2. The fast and stable deflection structure according to claim 1, characterized in that: The deflection structure also includes a shell, the annular protrusion (4) is located in the top opening of the shell and has a gap with the top opening, the fixing surface is formed on the top of the shell, and the fixing plate (6) is a three-pronged plate, which is fixed to the bottom of the shell by three columns (12).

3. The fast and stable deflection structure according to claim 2, characterized in that: The centripetal spring group comprises three springs (13) of the same material and length, and the three springs are axially symmetrically arranged.

4. The fast and stable deflection structure according to claim 3, characterized in that: Three earrings (17) are respectively fixed below the edge of the three-pronged plate, one end of each spring (13) is fixed on the earring (17), and the other end is fixed on the base (5).

5. The fast and stable deflection structure according to claim 1, characterized in that: The hanging basket frame (3) is composed of three evenly distributed support rods.

6. The fast and stable deflection structure according to claim 5, characterized in that: The support rod and the top support (1) are fixed by means of a set screw (19).

7. The fast and stable deflection structure according to claim 1, characterized in that: The base (5) is fixed on the upper surface of the base (2) via a fixing nut (18).

8. The fast and stable deflection structure according to claim 1, characterized in that: The support shaft (7) comprises a large support shaft (7-1) fixed to the lower surface of the fixing plate (6) and a small support shaft (7-2) in contact with the support shaft socket (8). The small supporting shaft (7-2) is fixed to the bottom of the large supporting shaft (7-1).

9. The fast and stable deflection structure according to claim 2, characterized in that: The housing comprises an upper end cover (14), a lower end cover (15) and a sleeve (16); the top opening is located in the middle of the upper end cover (14); and the column (12) is fixed on the lower end cover (15).

10. The fast and stable deflection structure according to claim 9, characterized in that: A door (20) is arranged on the side wall of the sleeve (16).

11. Application of the fast and stable deflection structure according to any one of claims 1 to 10 in magnetic property detection, characterized in that: A magnetic conductive ring (21) for providing a yaw driving force is fixed to the outer edge of the annular protrusion (4).

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