Optomagnetic combined absolute value encoder

Abstract

The utility model relates to the technical field of encoders, and discloses an optical-magnetic combined absolute value encoder, which comprises a metal protective shell, an optical structure protective shell, a hollow shaft, an optical-magnetic coupling disc, an optical-magnetic detection module and a multi-layer protective structure, and is characterized in that the optical structure protective shell is arranged inside the metal protective shell; the upper end and the lower end of the hollow shaft penetrate through the upper side and the lower side of the optical structure protection shell and are inserted into the upper side and the lower side of the metal protection shell, the optomagnetic coupling disc is fixed to the position, located in the optical structure protection shell, of the periphery of the hollow shaft, and the multi-layer protection structure is installed on the outer side of the optical structure protection shell. According to the absolute value encoder with the optomagnetic combination, the design that the optomagnetic combination technology is combined with a plurality of layers of protection structures such as a metal protection shell, an electromagnetic shielding layer, an optical structure protection shell and a clamping block for fixation is adopted, so that the anti-interference capability and the structural stability of the encoder are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to encoder technical field, concretely is an absolute value encoder of light magnetic combination. BACKGROUND

[0002] The absolute value encoder of light magnetic combination is a kind of high-precision, high-stability position detection device, and is commonly used in industrial automation, robot control and precision measurement etc.

[0003] Traditional encoder is realized by single technology (such as pure optical or pure magnetic), and there are problems such as being susceptible to environmental interference and precision limitation. With the development of technology, light magnetic combination technology emerges as the times require, and by combining the advantages of optics and magnetism, higher precision and stronger anti-interference ability are realized, but the existing light magnetic combination encoder often lacks sufficient protection mechanism in structural design, is susceptible to electromagnetic interference and physical damage, and affects service life and performance stability. In order to overcome the above problems, a new type of absolute value encoder design scheme of light magnetic combination is proposed in this paper, which improves the precision and stability of the encoder by multi-layer protection structure, high-precision bearing and innovative light magnetic coupling disc design, and enhances the anti-interference ability and durability, providing a more reliable choice for the application in industrial automation etc. UTILITY MODEL CONTENT

[0004] (I) technical problem solved

[0005] In view of the deficiencies of prior art, the utility model provides an absolute value encoder of light magnetic combination, which has the advantages of multi-layer protection structure, high-precision light magnetic coupling disc, etc., and solves the problems of traditional encoder, such as being susceptible to electromagnetic interference, precision limitation and insufficient durability.

[0006] (II) technical scheme

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] An absolute value encoder of light magnetic combination, comprising a metal protective shell, an optical structure protective shell, a hollow shaft, a light magnetic coupling disc, a light magnetic detection module and a multi-layer protection structure, the optical structure protective shell is arranged in the interior of the metal protective shell, the upper and lower ends of the hollow shaft penetrate the upper and lower sides of the optical structure protective shell and are inserted into the upper and lower sides of the metal protective shell, the light magnetic coupling disc is fixed on the periphery of the hollow shaft in the interior of the optical structure protective shell, the light magnetic detection module is fixed on the top surface of the optical structure protective shell near the edge of the light magnetic coupling disc, and the multi-layer protection structure is installed on the outside of the optical structure protective shell.

[0009] The multi-layer protection structure comprises an electromagnetic shielding layer, a first L-shaped clamping block and a second L-shaped clamping block, the electromagnetic shielding layer is arranged between the metal protective shell and the optical structure protection shell, the two sides of the electromagnetic shielding layer close to the metal protective shell are fixed with the first L-shaped clamping block, and the two sides of the optical structure protection shell close to the electromagnetic shielding layer are fixed with the second L-shaped clamping block.

[0010] As a preferred technical scheme of the utility model, the inside of the metal protective shell is provided with a first clamping groove corresponding to the first L-shaped clamping block, the protruding end of the first L-shaped clamping block is inserted into the first clamping groove, the inside of the optical structure protection shell is provided with a second clamping groove corresponding to the second L-shaped clamping block, and the protruding end of the second L-shaped clamping block is inserted into the second clamping groove.

[0011] As a preferred technical scheme of the utility model, the optical-magnetic coupling disc comprises a magnetic encoding disc and an optical encoding disc, the magnetic encoding disc adopts a magnetic material with high coercivity, and a multi-pole magnetic encoding pattern is formed on the disc surface through accurate magnetic polarization process, and the optical encoding disc is made of high-precision optical encoding stripes on a transparent disc through photoetching technology.

[0012] As a preferred technical scheme of the utility model, the hollow shaft is internally provided with a fiber bundle groove above the optical-magnetic coupling disc, and the fiber bundle groove of the hollow shaft is installed with a fiber bundle.

[0013] As a preferred technical scheme of the utility model, the top surface middle part and the bottom surface middle part in the metal protective shell are fixed with a magnetic suspension bearing and a ball bearing respectively, and the upper and lower ends of the hollow shaft are inserted into the inner rings of the ball bearing and the magnetic suspension bearing respectively.

[0014] As a preferred technical scheme of the utility model, the bottom surface middle part of the metal protective shell is fixed with a protruding block, the lower end of the hollow shaft is fixed with a connecting rod penetrating through the bottom surface of the protruding block, and the lower end of the connecting rod is peripherally clamped with a clamping groove.

[0015] As a preferred technical scheme of the utility model, the outside of the metal protective shell close to the first L-shaped clamping block is fixed with a mounting block, and the side, away from the metal protective shell, of the mounting block is provided with a threaded interface.

[0016] (Three) beneficial effects

[0017] Compared with the prior art, the utility model provides an absolute value encoder combined with light and magnetism, which has the following beneficial effects:

[0018] The absolute value encoder of the optical-magnetic combination, through the design of combining the optical-magnetic combination technology with the multi-layer protection structure such as the metal protection shell, the electromagnetic shielding layer, the optical structure protection shell and the clamping block fixation, remarkably improves the anti-interference ability and the structural stability of the encoder, the magnetism of the optical-magnetic coupling disc is combined with the optical encoding, ensures the high-precision measurement, the design of the optical fiber bundle groove and the optical fiber bundle in the hollow shaft optimizes the optical signal transmission, the application of the ball bearing and the magnetic suspension bearing enhances the rotation precision and the stability, the compact overall design effectively solves the problems of the precision limitation and the easy interference of the traditional encoder, and improves the equipment performance and the service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Figure 2 It is a structural schematic view of the utility model Figure 1 It is an enlarged view of A;

[0021] Figure 3 It is an enlarged view of B of the utility model Figure 1

[0022] In the figure: 1, metal protection shell; 2, electromagnetic shielding layer; 3, optical structure protection shell; 4, hollow shaft; 5, ball bearing; 6, magnetic suspension bearing; 7, optical-magnetic coupling disc; 8, optical-magnetic detection module; 9, optical fiber bundle groove; 10, optical fiber bundle; 11, first L-shaped clamping block; 12, first clamping groove; 13, second L-shaped clamping block; 14, second clamping groove; 15, protruding block; 16, connecting rod; 17, mounting block; 18, threaded interface. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0025] ​In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term '' install '' '' link '' '' connection '' should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside intercommunication, for ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model with specific situation.

[0026] Please refer to Figures 1-3 A kind of absolute value encoder of optical magnetic combination, including metal protective shell 1, optical structure protection shell 3, hollow shaft 4, optical magnetic coupling disc 7, optical magnetic detection module 8 and multilayer protection structure, optical structure protection shell 3 is set in the inside of metal protective shell 1, the upper and lower ends of hollow shaft 4 are through the upper and lower sides of optical structure protection shell 3 and are inserted in the upper and lower sides of metal protective shell 1, optical magnetic coupling disc 7 is fixed in the periphery of hollow shaft 4 and is located in the inside of optical structure protection shell 3, optical magnetic detection module 8 is fixed on the top surface of the edge of optical magnetic coupling disc 7 in the inside of optical structure protection shell 3, multilayer protection structure is installed on the outside of optical structure protection shell 3;

[0027] Multilayer protection structure includes electromagnetic shielding layer 2, first L-shaped block 11 and second L-shaped block 13, electromagnetic shielding layer 2 is arranged between metal protective shell 1 and optical structure protection shell 3, the two sides of electromagnetic shielding layer 2 close to metal protective shell 1 are fixed with first L-shaped block 11, and the two sides of optical structure protection shell 3 close to electromagnetic shielding layer 2 are fixed with second L-shaped block 13.

[0028] In the embodiment, the inside of metal protective shell 1 is provided with first clamping groove 12 corresponding to first L-shaped block 11, the protruding end of first L-shaped block 11 is inserted into first clamping groove 12, the inside of electromagnetic shielding layer 2 is provided with second clamping groove 14 corresponding to second L-shaped block 13, and the protruding end of second L-shaped block 13 is inserted into second clamping groove 14, the design of the multilayer protection structure not only provides physical protection to prevent damage to internal precision components by external impact, but also effectively reduces the influence of electromagnetic interference on optical magnetic detection module 8 through electromagnetic shielding layer 2, ensures the accuracy of measurement, and the insertion design of first L-shaped block 11 and second L-shaped block 13 and the corresponding clamping groove simplifies the installation process and enhances the stability of the structure.

[0029] In this embodiment, the optical-magnetic coupling disc 7 is composed of a magnetic encoder disc and an optical encoder disc. The magnetic encoder disc is made of high-coercivity magnetic material and forms a multi-pole magnetic encoding pattern on the disc surface through precise magnetic polarization process. The optical encoder disc is made of transparent disc and high-precision optical encoding stripes through photolithography technology. The high-coercivity material of the magnetic encoder disc ensures the stability and durability of the encoding, while the high-precision stripes of the optical encoder disc are realized through advanced photolithography technology. The two complement each other and improve the measurement accuracy of the encoder.

[0030] In this embodiment, the hollow shaft 4 has a fiber bundle groove 9 inside the optical-magnetic coupling disc 7. The fiber bundle 10 is installed in the fiber bundle groove 9 of the hollow shaft 4. The clever design of the fiber bundle groove 9 and the fiber bundle 10 not only optimizes the transmission path of the optical signal, reduces signal attenuation, but also improves the transmission speed of the signal, so that the optical-magnetic detection module 8 can capture the encoding changes on the optical-magnetic coupling disc 7 more quickly and accurately, further improving the response speed and measurement accuracy of the encoder. The optical-magnetic detection module 8 is composed of a circuit board, an optical sensor and a magnetic sensor.

[0031] In this embodiment, the top and bottom middle parts of the metal protective shell 1 are fixed with magnetic levitation bearings 6 and ball bearings 5 respectively. The upper and lower ends of the hollow shaft 4 are inserted into the inner rings of the magnetic levitation bearings 6 and the ball bearings 5 respectively. The magnetic levitation bearings 6 provide good mechanical support and smooth rotation, while the ball bearings 5 further reduce friction and wear through magnetic levitation technology. The combination of the two significantly improves the rotation accuracy and stability of the hollow shaft 4, providing a strong guarantee for the high-precision measurement of the encoder.

[0032] In this embodiment, the bottom middle part of the metal protective shell 1 is fixed with a protrusion 15, and the lower end of the hollow shaft 4 is fixed with a connecting rod 16 that penetrates the bottom surface of the protrusion 15. The lower end of the connecting rod 16 is provided with a clamping groove. The clamping groove at the lower end of the connecting rod 16 provides an additional connection option, such as connecting to the external structure through clamping, enhancing the applicability and flexibility of the encoder.

[0033] In this embodiment, the metal protective shell 1 is fixed with a mounting block 17 near the outer side of the first L-shaped clamping block 11. The mounting block 17 is provided with a threaded interface 18 away from the metal protective shell 1. The design of the mounting block 17 and the threaded interface 18 simplifies the installation process of the encoder, making it easy for users to install it on the target device.

[0034] Advantages:

[0035] The absolute value encoder of the optical-magnetic combination, through the optical-magnetic combination technology combined with the multi-layer protection structure such as the metal protective shell 1, the electromagnetic shielding layer 2, the optical structure protective shell 3 and the first L-shaped clamping block 11 and the second L-shaped clamping block 13 fixed design, significantly improves the anti-interference ability and structural stability of the encoder, the magnetism of the optical-magnetic coupling disc 7 is combined with the optical encoding, ensures the high-precision measurement, the design of the optical fiber bundle slot 9 and the optical fiber bundle 10 in the hollow shaft 4, optimizes the optical signal transmission, the application of the magnetic suspension bearing 6 and the ball bearing 5, enhances the rotation precision and stability, the overall design is compact, effectively solves the problems of limited precision of traditional encoder, easy to be interfered and the like, improves the equipment performance and service life.

[0036] Working principle:

[0037] The optical structure protective shell 3 in the metal protective shell 1 is stably installed, the hollow shaft 4 penetrates and fixes the optical-magnetic coupling disc 7, along with the rotation of the hollow shaft 4, the magnetic encoding and optical encoding on the optical-magnetic coupling disc 7 change synchronously, the optical sensor and the magnetic sensor in the optical-magnetic detection module 8 accurately capture, the optical fiber bundle 10 efficiently transmits the optical signal through the optical fiber bundle slot 9 in the hollow shaft 4, enhances the signal quality, at the same time, the electromagnetic shielding layer 2 is combined with the stable installation of the first L-shaped clamping block 11 and the second L-shaped clamping block 13, effectively isolates the external electromagnetic interference, the magnetic suspension bearing 6 and the ball bearing 5 ensure the high precision and stability of the rotation of the hollow shaft 4, finally, through the installation block 17 and the threaded interface 18, it is conveniently installed in the equipment, realizes the high-precision, high-stability position detection.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A kind of absolute value encoder of magneto-optical combination, comprising metal protection shell (1), optical structure protection shell (3), hollow shaft (4), magneto-optical coupling disc (7), magneto-optical detection module (8) and multilayer protection structure, the optical structure protection shell (3) is arranged in the inside of metal protection shell (1), the upper and lower ends of the hollow shaft (4) are inserted in the upper and lower sides of metal protection shell (1) and are inserted in the upper and lower sides of optical structure protection shell (3), the periphery of the hollow shaft (4) is fixed with magneto-optical coupling disc (7) in the inside of optical structure protection shell (3), the top surface of the inside of optical structure protection shell (3) is fixed with magneto-optical detection module (8) near the edge of magneto-optical coupling disc (7), and the multilayer protection structure is installed on the outside of optical structure protection shell (3); The multilayer protection structure comprises electromagnetic shielding layer (2), first L-shaped block (11) and second L-shaped block (13), electromagnetic shielding layer (2) is arranged between metal protection shell (1) and optical structure protection shell (3), the two sides of electromagnetic shielding layer (2) are fixed with first L-shaped block (11) near metal protection shell (1), and the two sides of optical structure protection shell (3) are fixed with second L-shaped block (13) near electromagnetic shielding layer (2). characterized in that The inside of metal protection shell (1) is provided with first clamping groove (12) corresponding to first L-shaped block (11), the protruding end of first L-shaped block (11) is inserted into first clamping groove (12), and the inside of electromagnetic shielding layer (2) is provided with second clamping groove (14) corresponding to second L-shaped block (13), and the protruding end of second L-shaped block (13) is inserted into second clamping groove (14).

2. A magneto-optic absolute encoder according to claim 1, characterized in that: The magneto-optical coupling disc (7) is composed of a magnetic encoder disc and an optical encoder disc, the magnetic encoder disc is made of a high-coercivity magnetic material, and a multi-pole magnetic encoding pattern is formed on the disc surface through precise magnetic polarization process, and the optical encoder disc is made of a transparent disc through photoetching technology.

3. The absolute value encoder of claim 1, wherein: the magnetic encoder is a magnetic encoder that generates a magnetic field; and the optical encoder is an optical encoder that generates an optical field. The hollow shaft (4) is provided with an optical fiber bundle groove (9) inside the upper part of the magneto-optical coupling disc (7), and the optical fiber bundle (10) is installed in the optical fiber bundle groove (9) of the hollow shaft (4).

4. The magneto-optic absolute encoder of claim 1, wherein: The top surface and the bottom surface of the inside of the metal protection shell (1) are respectively fixed with a magnetic levitation bearing (6) and a ball bearing (5), and the upper and lower ends of the hollow shaft (4) are respectively inserted into the inner ring of the magnetic levitation bearing (6) and the ball bearing (5).

5. The magneto-optic absolute encoder of claim 1, wherein: The bottom surface of the metal protection shell (1) is fixed with a protrusion (15), the lower end of the hollow shaft (4) is fixed with a connecting rod (16) penetrating through the bottom surface of the protrusion (15), and the lower end of the connecting rod (16) is provided with a clamping groove.

6. A magneto-optic absolute encoder according to claim 1, characterized in that: The outside of the metal protection shell (1) is fixed with a mounting block (17) near the first L-shaped block (11), and the side away from the metal protection shell (1) of the mounting block (17) is provided with a threaded interface (18).

7. The absolute value encoder of claim 1, wherein: ​

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