Magnetic suspension weighing device

Abstract

The utility model provides a magnetic suspension weighing device, comprising a weighing main body which is internally provided with a weighing sensor, and the weighing sensor is provided with a weighing end; the magnetic suspension foundation is arranged at the upper end of the weighing end and comprises a fixed support fixed with the weighing end, an electrified coil arranged on the fixed support and a foundation magnet arranged on the fixed support; the scale pan is movably arranged on the upper end face of the weighing body, a suspension magnet is arranged at the bottom in the scale pan, and the magnetic pole of the suspension magnet is opposite to that of the basic magnet so that the scale pan can suspend relative to the upper end face of the weighing body; according to the utility model, non-contact connection between the scale pan and the weighing main body is realized through a magnetic suspension principle, weighing deviation caused by accumulated tolerance is effectively avoided, and weighing precision is substantially improved. Meanwhile, due to the suspension design of the scale pan, the upper cover of the weighing main body does not need to be opened, the waterproof, dustproof and insect-proof performance is greatly improved, and the overall function and protection of the weighing device reach a new level.

Description

Technical Field

[0001] The utility model relates to the technical field of maglev scales, in particular to a weighing device based on maglev technology. Background Art

[0002] Traditional weighing devices mainly consist of key components such as a weighing pan, a sensor bracket, and a weighing sensor. These components are usually connected in a mutually locked manner, that is, the sensor bracket is fixed on the weighing sensor, and the weighing pan is placed on the sensor bracket. Although this design is simple and practical, there are some obvious limitations and defects in actual applications.

[0003] First of all, due to the cumulative tolerance problems between components, the weighing result may be inaccurate to a certain extent. When the weighing pan or the sensor comes into contact with the upper cover of the weighing body, this deviation will be further aggravated, affecting the measurement accuracy.

[0004] Secondly, the weighing sensor in the traditional weighing device is usually installed inside the weighing body, while the weighing pan is located above the weighing body. This requires that the upper cover of the weighing body must be provided with an opening to ensure that the weighing pan can be placed smoothly. Such a structure not only increases the manufacturing complexity but also significantly reduces the waterproof, dustproof, and insect-proof capabilities of the weighing device. These problems are particularly prominent when used in outdoor or industrial environments.

[0005] In view of this, the inventor of the present utility model has specifically designed a weighing device based on maglev technology, and this case is thus generated. Summary of the Utility Model

[0006] In order to solve the above problems, the technical solution of the present utility model is as follows:

[0007] A weighing device based on maglev technology, comprising:

[0008] A weighing body, inside which a weighing sensor is provided. The weighing sensor has a weighing end for detecting mass according to the degree of pressure.

[0009] A maglev base, provided above the weighing end, including a fixed support fixed to the weighing end, an energized coil provided on the fixed support, and a base magnet provided on the fixed support.

[0010] A weighing pan, movably provided on the upper end face of the weighing body. A suspension magnet is provided at the inner bottom of the weighing pan. The magnetic pole of the suspension magnet is set opposite to that of the base magnet so that the weighing pan can be suspended relative to the upper end face of the weighing body.

[0011] Wherein, the weighing body is enclosed relative to the external environment.

[0012] Preferably, the fixed support includes a connecting seat located in the middle and a plurality of support arms extending around the circumference of the connecting seat. A convex portion is provided on the lower end surface of the connecting seat, and a contact surface that can stably contact the weighing end is formed on the lower end surface of the convex portion.

[0013] Preferably, there are four support arms, which are evenly and symmetrically distributed around the circumference of the connecting seat to form an X shape.

[0014] Preferably, positioning grooves are provided on the upper end surfaces of a plurality of the support arms and on the inner sides close to each other, and the energized coil is embedded in the positioning grooves.

[0015] Preferably, the basic magnet is in a circular ring shape and is arranged around the connecting seat as the center on the outside of a plurality of support arms, and the energized coil is arranged inside the basic magnet.

[0016] Preferably, after the energized coil is embedded in the positioning groove, its upper end surface is flush with the upper end surface of the basic magnet, and a fixing pressing piece for pressing the basic magnet and the energized coil is provided on each support arm.

[0017] Preferably, an arc-shaped limiting groove adapted to the shape of the covered part of the basic magnet is provided on the support arm, and the limiting grooves on a plurality of support arms enclose a circular layout centered on the connecting seat so that the basic magnet can be embedded in the corresponding limiting grooves and be centered with respect to the connecting seat.

[0018] Preferably, a wire passing hole is provided through the bottom of the positioning groove.

[0019] Preferably, the basic magnet is adhesively fixed on a plurality of support arms.

[0020] Preferably, it further includes: a Hall sensor, which is arranged at the center of the fixed support and is electrically connected to the energized coil for controlling the direction of the weighing pan.

[0021] The beneficial effects of the present utility model are as follows:

[0022] Through the principle of magnetic levitation, the present utility model realizes the non-contact connection between the weighing pan and the weighing main body, effectively avoids the weighing deviation caused by cumulative tolerance, and significantly improves the weighing accuracy. At the same time, due to the floating design of the weighing pan, there is no need to open an opening on the upper cover of the weighing main body, greatly improving the waterproof, dustproof and insect-proof performance, and bringing the overall function and protection of the weighing device to a new level. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0024] Among them:

[0025] Figure 1 is the overall structural schematic diagram of the present utility model;

[0026] Figure 2 is the exploded structural schematic diagram of the present utility model;

[0027] Figure 3 is the partial exploded structural schematic diagram highlighting the weighing pan in the present utility model;

[0028] Figure 4 is one of the partial structural schematic diagrams highlighting the magnetic levitation base in the present utility model;

[0029] Figure 5 is the partial exploded structural schematic diagram highlighting the magnetic levitation base in the present utility model;

[0030] Figure 6 is the second partial structural schematic diagram highlighting the magnetic levitation base in the present utility model;

[0031] Figure 7 is the partial exploded structural schematic diagram highlighting the wiring groove in the present utility model.

[0032] Reference numeral description:

[0033] 10, weighing main body; 11, mounting panel; 111, wiring groove; 112, jack; 12, housing; 13, display and control module; 14, support foot; 15, control circuit board; 20, weighing sensor; 21, weighing end; 22, horizontal section; 23, vertical section; 30, magnetic levitation base; 31, fixed support; 311, connecting seat; 312, support arm; 313, protruding part; 314, positioning groove; 315, wire passing hole; 316, limiting groove; 317, mounting groove; 318, fixing groove; 32, energized coil; 33, base magnet; 34, locking bolt; 35, fixing pressing piece; 351, connecting surface; 352, accommodating area; 40, weighing pan; 41, levitation magnet; 42, hidden area; 50, Hall sensor. Detailed implementation manners

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0035] Please refer to Figures 1 to 7 , which is a weighing device with magnetic levitation as the best embodiment of the present utility model, including:

[0036] A weighing body 10 is provided with a weighing sensor 20 inside. The weighing sensor 20 has a weighing end 21 for realizing mass detection according to the degree of compression.

[0037] In this embodiment, the weighing body 10 includes a mounting panel 11, a housing 12 fixed to the upper end face of the mounting panel 11, a display and control module 13 installed on the front side of the housing 12, adjustable support feet 14 fixed to the bottom of the mounting panel 11, and a control circuit board 15 arranged on the upper end face of the mounting panel 11. A relatively enclosed installation space (not marked in the figure) is formed by enclosing between the mounting panel 11 and the housing 12. The weighing sensor 20 is integrally L-shaped, including a horizontal section 22 and a vertical section 23. The vertical section 23 is arranged on one side of the control circuit board 15, and the horizontal section 22 extends horizontally in one direction based on the vertical section 23. One end of the horizontal section 22 far from the vertical section 23 forms the weighing end 21, and the electrical connection with the control circuit board 15 is realized through the vertical section 23 to enable the control circuit board 15 to control the weighing sensor 20.

[0038] A magnetic levitation base 30 is arranged above the weighing end 21, including a fixed support 31 fixed to the weighing end 21, an energized coil 32 arranged on the fixed support 31, and a base magnet 33 arranged on the fixed support 31.

[0039] Specifically, in combination with Figure 5 、 7 , the fixed support 31 includes a connecting seat 311 located in the middle and several support arms 312 extending around the circumferential side of the connecting seat 311. A protruding portion 313 protrudes from the lower end face of the connecting seat 311, and a contact surface (not marked in the figure) that can be in stable contact with the weighing end 21 is formed on the lower end face of the protruding portion 313. In this embodiment, an installation groove 317 is formed by inward depression at the position of the protruding portion 313 on the upper end face of the connecting seat 311. The upper end face of the weighing end 21 is a flat surface flush with the contact surface. Through a pair of locking bolts 34, they penetrate into the inner bottom of the installation groove 317 and pass through the weighing end 21, and the connecting seat 311 is locked and fixed to the weighing end 21 by means of threaded locking, thereby realizing the support for the magnetic levitation base 30. At this time, several support arms 312 are horizontally unfolded around the connecting seat 311 and are in a suspended state relative to the inner bottom of the mounting panel 11 of the weighing body 10, forming a stable support base for the energized coil 32 and the base magnet 33.

[0040] In addition, in this embodiment, through the position settings of the control circuit board 15 and the weighing sensor 20, the weighing end 21 can just be located at the center of the inner bottom of the mounting panel 11, so that the connecting seat 311 and each support arm 312 can be circumferentially unfolded around the center position of the mounting panel 11.

[0041] The weighing pan 40 is movably arranged on the upper end surface of the weighing main body 10, and a suspension magnet 41 is arranged at the inner bottom thereof. The magnetic pole of the suspension magnet 41 is set opposite to that of the base magnet 33 so that the weighing pan 40 can be suspended relative to the upper end surface of the weighing main body 10.

[0042] Specifically, in this embodiment, the weighing pan 40 is in a cuboid shape and the bottom surface is recessed inward to form a hollow hidden area 42. The suspension magnet 41 is centrally arranged at the center of the hidden area 42, opposite to the position of the magnetic levitation base 30 centered on the center position of the mounting panel 11, forming a cooperation to finally realize the suspension process of the weighing pan 40.

[0043] Among them, the weighing main body 10 is arranged in a closed manner relative to the external environment.

[0044] Specifically, combined with Figure 7 , in this embodiment, in order to facilitate the wiring of the installation space inside the weighing device and maintain the relative closed state between the installation space and the external environment, a wiring groove 111 is recessed upward from the bottom of the mounting panel 11. A plurality of jacks 112 (such as power interfaces, network interfaces, output interfaces, etc.) for installing various interfaces (not marked in the figure) are provided on the inner side wall of the wiring groove 111. Various structures are installed on the jacks 112 to close the jacks 112. At this time, the inner sides of various structures are located inside the installation space, and the electrical connection with the control circuit board 15 can continue to be realized, so that both the wiring needs of the weighing device can be met and the relative closure of the installation space can be maintained.

[0045] Preferably, as Figure 2 、 4 、shown in 5, there are four support arms 312, which are evenly and symmetrically distributed around the circumference of the connection seat 311 to form an X shape. Thus, through the 4 support arms 312 distributed in an X shape, a stable support foundation for the energized coil 32 and the base magnet 33 can be formed, so that the weighing pan 40 can be stably suspended.

[0046] Furthermore, as Figure 5 shown, positioning grooves 314 are provided on the upper end surfaces of several support arms 312 and on the inner sides close to each other. The energized coil 32 is embedded in the positioning grooves 314. In this embodiment, the energized coil 32 is integrally in a flat cylindrical shape, and the positioning grooves 314 are cylindrical grooves recessed downward from the upper end surfaces of the support arms 312, and the depth of the positioning grooves 314 is less than the height of the energized coil 32, so that the energized coil 32 can protrude from the upper end surface of the support arms 312 when embedded in the positioning grooves 314.

[0047] At the same time, a wiring hole 315 is also penetrated and opened at the center of the inner bottom of the positioning groove 314 for wiring connection between the energized coil 32 and the control circuit board 15, so as to realize the control of the magnitude and direction of the current of the energized coil 32.

[0048] Preferably, as Figure 2 and 4 shown in Fig. 5, the base magnet 33 is in a circular ring shape and is arranged around the outside of a plurality of support arms 312 with the connecting seat 311 as the center, and the energized coil 32 is arranged inside the base magnet 33.

[0049] Specifically, in this embodiment, the radius of the base magnet 33 is set so that it is approximately located at the middle position of the support arm 312, and the positioning groove 314 is opened on the inner side of the support arm 312, that is, on the side close to the connecting seat 311. The suspension magnet 41 is a disc, and the outer diameter of the suspension magnet 41 is adapted to the inner diameter of the base magnet 33, so that the four energized coils 32 and the base magnet 33 can form a stable magnetic force support for the suspension magnet 41. In the balanced state, the resultant force of the magnetic repulsion forces of the base magnet 33 and the four energized coils 32 on the suspension magnet 41 points directly upward based on the central position of the weighing body 10.

[0050] Furthermore, in order to automatically adjust the suspended state of the weighing pan 40 so that the weighing pan 40 can achieve stable and centered suspension, a Hall sensor 50 is also provided. In this embodiment, the weighing end 21 and the locking bolt 34 are arranged at positions deviating from the center of the weighing body 10. Inside the mounting groove 317 on the connecting seat 311 and at the centered position of the weighing body 10, there is a fixing groove 318 adapted to the shape of the Hall sensor 50, and the Hall sensor 50 is embedded in the fixing groove 318. In this embodiment, the Hall sensor 50 is electrically connected to the control circuit board 15 and is electrically connected to the energized coil 32. When the position of the weighing pan 40 deviates from the centered position of the weighing body 10, the Hall sensor 50 monitors the corresponding signal change, transmits it to the control circuit board 15 for data collection and processing calculation, and then feeds it back to the energized coil 32 to change the magnitude and direction of the current of the energized coil 32 at the corresponding position, so that the magnitude of the repulsive force on the suspension magnet 41 is changed, thereby correcting the position deviation of the weighing pan 40 in the corresponding direction and enabling the weighing pan 40 to maintain a stable centered suspension state.

[0051] Preferably, as Figure 4 and 5As shown in FIGS. 6, after the energized coil 32 is embedded in the positioning groove 314, its upper end surface is flush with the upper end surface of the base magnet 33, and a fixing pressing piece 35 for pressing the base magnet 33 and the energized coil 32 is provided on each support arm 312. In this embodiment, the fixing pressing piece 35 is in a "ji" shape, with connecting surfaces 351 flush with the upper end surface of the support arm 312 formed on both sides and a receiving area 352 for the base magnet 33 and the energized coil 32 formed in the middle. The connecting surfaces 351 on both sides are respectively locked and fixed on the support arm 312, and the energized coil 32 and the base magnet 33 located in the receiving area 352 are pressed by the fixing pressing piece 35 on the support arm 312, so as to realize the fixation and limitation of the energized coil 32 and the base magnet 33.

[0052] Preferably, the support arm 312 is provided with an arc-shaped limiting groove 316 adapted to the shape of the covered part of the base magnet 33. The limiting grooves 316 on several support arms 312 enclose a circular layout centered on the connecting seat 311 so that the base magnet 33 can be embedded in the corresponding limiting groove 316 and be centered about the connecting seat 311. Thus, the limiting and fixing effect on the support arm 312 is further enhanced through the limiting groove 316, enabling it to be stably arranged and forming a stable magnetic force support base for the levitating magnet 41.

[0053] Preferably, in order to further enhance the stability of the base magnet 33, the base magnet 33 is adhesively fixed in the limiting grooves 316 of several support arms 312 through an adhesive layer.

[0054] The beneficial effects of the present utility model are as follows:

[0055] Through the principle of magnetic levitation, the present utility model realizes the non-contact connection between the weighing pan 40 and the weighing main body 10, effectively avoids the weighing deviation caused by cumulative tolerances, and significantly improves the weighing accuracy. At the same time, due to the floating design of the weighing pan 40, there is no need to open an opening on the upper cover of the weighing main body 10, greatly improving the waterproof, dustproof and insect-proof performance, and bringing the overall function and protection of the weighing device to a new height.

[0056] The above has described the present utility model in an exemplary manner with reference to the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A magnetically suspended weighing device, characterized in that: include: A weighing body (10) is provided with a weighing sensor (20) therein, wherein the weighing sensor (20) has a weighing end (21) for realizing mass detection according to the degree of pressure; A magnetic suspension base (30) is arranged at the upper end of the weighing end (21), comprising a fixed support (31) fixed to the weighing end (21), an energized coil (32) arranged on the fixed support (31), and a basic magnet (33) arranged on the fixed support (31); A weighing pan (40) is movably arranged on the upper end surface of the weighing body (10), and a suspension magnet (41) is arranged at the inner bottom thereof. The magnetic pole of the suspension magnet (41) is arranged opposite to the base magnet (33) so that the weighing pan (40) is suspended relative to the upper end surface of the weighing body (10); Wherein, the weighing body (10) is arranged in a closed manner relative to the external environment.

2. A magnetically suspended weighing device according to claim 1, characterized in that: The fixed support (31) comprises a connecting seat (311) located in the middle and a plurality of supporting arms (312) extending around the connecting seat (311). A protruding portion (313) is provided on the lower end surface of the connecting seat (311). The lower end surface of the protruding portion (313) forms a contact surface that can stably contact the weighing end (21).

3. A magnetically suspended weighing device according to claim 2, characterized in that: The support arms (312) are provided with four and are evenly and symmetrically distributed around the circumference of the connection seat (311) to form an X shape.

4. A magnetically suspended weighing device according to claim 2, characterized in that: Positioning grooves (314) are provided on the upper end surfaces of a plurality of the support arms (312) and are located on inner sides close to each other, and the energized coil (32) is embedded in the positioning groove (314).

5. A magnetically suspended weighing device according to claim 4, characterized in that: The basic magnet (33) is annular and is arranged around the connecting seat (311) on the outside of a plurality of supporting arms (312), and the energized coil (32) is arranged on the inside of the basic magnet (33).

6. A magnetically suspended weighing device according to claim 5, characterized in that: After the energized coil (32) is embedded in the positioning groove (314), its upper end surface is flush with the upper end surface of the base magnet (33), and each of the support arms (312) is provided with a fixed pressing sheet (35) for pressing the base magnet (33) and the energized coil (32).

7. A magnetically suspended weighing device according to claim 5, characterized in that: The support arm (312) is provided with an arc-shaped limiting groove (316) that is adapted to the shape of the covering portion of the base magnet (33), and a plurality of limiting grooves (316) on the support arms (312) are enclosed to form an annular layout centered on the connecting seat (311) so that the base magnet (33) can be embedded in the limiting groove (316) at a corresponding position and distributed centrally with respect to the connecting seat (311).

8. The magnetically suspended weighing device according to claim 4, characterized in that: A wiring hole (315) is formed through the bottom of the positioning groove (314).

9. A magnetically suspended weighing device according to claim 5, characterized in that: The base magnet (33) is glued and fixed on a plurality of support arms (312).

10. A magnetically suspended weighing device according to any one of claims 1 to 9, characterized in that: Also includes: The Hall sensor (50) is arranged at the center of the fixed support (31), is electrically connected to the energized coil (32), and is used to control the direction of the weighing pan (40).

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