Encoder

Abstract

The utility model provides an encoder comprising a housing provided with a mounting cavity and a through hole which are communicated with each other; the circuit board is arranged in the mounting cavity; one end of the mounting shaft extends into the mounting cavity through the through hole; the magnetic part is arranged at one end, positioned in the mounting cavity, of the mounting shaft; the magnetic sensitive part is arranged on the side, away from the magnetic part, of the circuit board and electrically connected with the circuit board, and the magnetic sensitive part is opposite to the magnetic part in the axial direction of the mounting shaft. The magnetic sensitive part is arranged on the side, away from the magnetic part, of the circuit board, the distance between the circuit board and the magnetic part is reduced, the thickness space of the circuit board is fully utilized, and therefore the height of the encoder is reduced to the maximum extent, namely the overall axial size of the encoder is reduced, and the size of the encoder is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to an encoder. Background Art

[0002] At present, the magnetoelectric encoder is an angle measurement device based on magnetic field induction technology. It uses the interaction between magnetic elements and magnetic sensitive elements to detect changes in the magnetic field, and converts these changes into usable digital or analog signals through circuit processing. The magnetoelectric encoder has the characteristics of non-contact measurement, high precision, high stability, etc., and is widely used in various places where angle measurement is required.

[0003] The magnetoelectric encoder 10' in the related art, such as Figure 1 As shown, the Hall chip 30' is located at the bottom of the circuit board 20', and the magnetic element 40' is installed on the main shaft. Since a set distance needs to be maintained between the Hall chip 30' and the magnetic element 40', the size of the magnetoelectric encoder 10' in the axial direction is larger, resulting in a larger volume of the magnetoelectric encoder 10'. Utility Model Content

[0004] The embodiments of the utility model are intended to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of an embodiment of the present utility model provides an encoder.

[0006] In view of this, according to the first aspect of an embodiment of the utility model, an encoder is provided, the encoder comprising: a shell body, the shell body is provided with a connected installation cavity and a through hole; a circuit board is arranged in the installation cavity; a mounting shaft, one end of the mounting shaft extends into the installation cavity through the through hole; a magnetic part is arranged at one end of the mounting shaft located in the mounting cavity; a magnetic sensitive part is arranged on a side of the circuit board away from the magnetic part and is electrically connected to the circuit board, and along the axial direction of the mounting shaft, the magnetic sensitive part is opposite to the magnetic part.

[0007] The encoder provided by the embodiment of the utility model includes a housing, a circuit board, a mounting shaft, a magnetic component and a magnetic sensitive component. Specifically, the housing is provided with a mounting cavity and a through hole, and the through hole is connected to the mounting cavity. One end of the mounting shaft extends into the mounting cavity through the through hole, and the magnetic component is provided on the end of the mounting shaft inserted into the mounting cavity.

[0008] The magnetic sensitive component is electrically connected to the circuit board, and the magnetic sensitive component is arranged on the side of the circuit board away from the magnetic component, that is, the magnetic sensitive component and the magnetic component are distributed on opposite sides of the circuit board. Along the axial direction of the installation axis, the magnetic sensitive component is opposite to the magnetic component. It can be understood that along the axial direction of the installation axis, there is a certain gap between the circuit board and the magnetic component.

[0009] Specifically, when the installation shaft rotates, the magnetic part is driven to rotate synchronously, and the magnetic sensitive part senses the angular displacement of the magnetic part. At the same time, the electrical signal is output after being processed by the circuit board, so that the rotation angle of the installation shaft can be accurately measured.

[0010] It is understandable that since a certain distance needs to be maintained between the magnetic component and the magnetic sensitive component, specifically, the distance is generally between 0.8mm and 3mm, setting the magnetic sensitive component on the side of the circuit board away from the magnetic component is beneficial to reducing the gap between the circuit board and the magnetic component, making full use of the thickness space of the circuit board, thereby minimizing the height of the encoder, that is, reducing the overall axial size of the encoder, reducing the volume of the encoder, making the encoder more refined, and thus bringing more possibilities for smaller servo motors, stepper motors, mechanical equipment, etc.

[0011] Optionally, the magnetic member includes a solid radial magnet or a circular radial magnet, which can be specifically configured according to actual needs.

[0012] Optionally, the magnetic sensitive element includes a Hall chip or other magnetic sensitive devices.

[0013] Optionally, the circuit board is fixed to the housing by AB glue, UV (Ultraviolet Rays) glue or screws.

[0014] Optionally, the mounting shaft is a blind hole shaft, that is, the mounting shaft is provided with a blind hole, and the blind hole is used to connect the motor shaft to wait for the mounting device. Alternatively, the mounting shaft is a hollow shaft, that is, the mounting shaft is provided with a connecting hole, and the connecting hole is used to connect the motor shaft to wait for the mounting device. Alternatively, the mounting shaft is a solid shaft, and the solid shaft is connected to the motor shaft to wait for the mounting device through a coupling.

[0015] Optionally, the encoder comprises a magneto-electric encoder.

[0016] In addition, the encoder provided according to the above technical solution of the utility model also has the following additional technical features:

[0017] In some technical solutions, optionally, the magnetically sensitive component is configured to be close to the central axis of the magnetic component.

[0018] In this technical solution, the magnetic sensitive component is limited to be arranged close to the central axis of the magnetic component, that is, the magnetic sensitive component is centered on the magnetic component, which is beneficial to improving the measurement accuracy of the encoder.

[0019] In some technical solutions, optionally, the shell is further provided with an opening, which is connected to the installation cavity; the encoder also includes a connecting terminal, which is provided on the circuit board and electrically connected to the circuit board, and the connecting terminal is configured to be close to the opening.

[0020] In this technical solution, it is defined that the encoder also includes a connecting terminal. Specifically, the connecting terminal is arranged on the circuit board, and the connecting terminal is electrically connected to the circuit board. It can be understood that the connecting terminal is used to connect to an external device and to output an electrical signal.

[0021] The shell is also provided with an opening, which is connected to the installation cavity. The connecting terminal is arranged close to the opening, so that while it is convenient for the connecting terminal to connect to external equipment, it can avoid interference between the connecting terminal and other structures in the installation cavity, reasonably arrange the space in the installation cavity, and improve the space utilization rate in the installation cavity.

[0022] Optionally, along the axial direction of the mounting axis, the connection terminal is arranged on the side of the circuit board away from the magnetic sensitive component, that is, the connection terminal is arranged at the bottom of the circuit board. Alternatively, the connection terminal is arranged on the side of the circuit board away from the magnetic component, that is, the connection terminal is arranged on the top of the circuit board. The specific arrangement can be made according to actual needs.

[0023] In some technical solutions, optionally, along the axial direction of the installation axis, the connection terminal is located on a side of the circuit board away from the magnetic sensitive component.

[0024] In this technical solution, it is stipulated that the connecting terminal is arranged on the side of the circuit board away from the magnetic sensitive component, that is, the connecting terminal is arranged at the bottom of the circuit board, so that the free space formed between the circuit board and the bottom wall of the installation cavity can be fully utilized, which is beneficial to further reduce the axial dimension of the encoder and reduce the volume of the encoder.

[0025] In some technical solutions, optionally, a mounting groove is provided at one end of the mounting shaft, the mounting groove is communicated with the mounting cavity, and at least a portion of the magnetic component is embedded in the mounting groove along the axial direction of the mounting shaft.

[0026] In this technical solution, a mounting groove is provided at one end of the mounting shaft. Specifically, along the axial direction of the mounting shaft, at least part of the magnetic component is embedded in the mounting groove, thereby reducing the space occupied by the magnetic component in the axial direction, further reducing the overall axial size of the encoder, reducing the overall volume of the encoder, and making the encoder structure more compact.

[0027] Furthermore, embedding at least a portion of the magnetic component into the mounting groove is beneficial to improving the mounting reliability of the magnetic component and ensuring the measurement accuracy of the encoder.

[0028] In some technical solutions, optionally, the encoder further includes a first adhesive component, and the magnetic component is connected to the mounting shaft via the first adhesive component.

[0029] In this technical solution, it is defined that the encoder also includes a first adhesive component. Specifically, the magnetic component is connected to the mounting shaft through the first adhesive component, which is beneficial to improving the installation efficiency between the magnetic component and the mounting shaft, and is also beneficial to reducing the overall space occupied by the encoder in the axial direction and reducing the overall volume of the encoder.

[0030] Optionally, the magnetic member is connected to the groove wall of the installation groove through a first adhesive member.

[0031] Optionally, the first adhesive member includes anaerobic adhesive or AB adhesive.

[0032] Optionally, the magnetic member is interference fit with the mounting shaft to achieve connection between the magnetic member and the mounting shaft.

[0033] In some technical solutions, optionally, the encoder also includes a bearing and a second adhesive component, wherein the bearing is arranged on the outer periphery of the mounting shaft and located at the through hole, the mounting shaft can drive the bearing to rotate relative to the housing, and the bearing is rotatably connected to the hole wall of the through hole through the second adhesive component.

[0034] In this technical solution, it is defined that the encoder also includes a bearing and a second adhesive component. Specifically, the bearing sleeve is arranged on the outside of the mounting shaft, and the bearing is connected to the hole wall of the through hole through the second adhesive component. Compared with the related technology of setting a step on the inner wall of the shell to axially limit the bearing, it is beneficial to further reduce the overall axial structural dimensions of the encoder and reduce the overall volume of the encoder.

[0035] In addition, when the mounting shaft is connected to the motor shaft of the motor, the mounting shaft can drive the bearing to rotate relative to the housing.

[0036] Optionally, a limiting surface is provided on the outer wall of the installation shaft, and the bearing abuts against the limiting surface along the axial direction of the installation shaft to limit the bearing axially and ensure reliable installation of the bearing.

[0037] Optionally, the number of bearings is at least two, at least two bearings are arranged axially along the mounting shaft, and the gap between any two adjacent bearings is 0, that is, any two adjacent bearings are in contact with each other, so as to further reduce the overall axial size of the encoder.

[0038] In some technical solutions, optionally, the number of bearings is at least two, and at least two bearings are arranged along the axial direction of the mounting shaft; the encoder also includes a separator, and the separator is arranged between any two adjacent bearings.

[0039] In this technical solution, it is defined that the encoder further includes a separator. Specifically, the number of bearings is at least two, and at least two bearings are arranged along the axial direction of the mounting shaft. The separator is arranged between any two adjacent bearings to prevent friction or slippage between the two adjacent bearings, thereby ensuring the measurement accuracy of the encoder and extending the service life of the encoder.

[0040] In some technical solutions, optionally, the separator includes a gasket or a boss; when the separator includes a boss, the boss is provided on the shell and is located in the through hole.

[0041] In this technical solution, it is defined that the separator includes a gasket, that is, the gasket is arranged between any two adjacent bearings. Alternatively, the housing is provided with a boss, the boss is located in the through hole, and the boss is located between any two adjacent bearings. The specific arrangement can be made according to actual needs.

[0042] Optionally, the thickness of the gasket is between 0.2 mm and 0.5 mm, that is, the thickness of the gasket is relatively thin, thereby being able to reduce the space occupied by at least two bearings in the axial direction, which is beneficial to further reduce the volume of the encoder.

[0043] In some technical solutions, optionally, the shell includes a base and a cover plate, wherein the base is provided with interconnected grooves and through holes, and the cover plate is arranged at the notch of the groove and encloses the groove wall of the groove to form an installation cavity.

[0044] In this technical solution, it is defined that the shell includes a base and a cover plate. Specifically, the base is provided with a groove and a through hole, the cover plate is arranged at the notch of the groove, and the cover plate and the groove wall of the groove are enclosed to form an installation cavity.

[0045] Optionally, the cross-sectional shape of the base is circular.

[0046] Optionally, a sealing member is provided at the connection between the cover plate and the base to seal the connection between the cover plate and the base, wherein the sealing member comprises anaerobic adhesive, so that the sealing can be achieved while the cover plate and the base are connected.

[0047] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0049] Figure 1 A schematic diagram of the structure of a magnetoelectric encoder in the related art is shown;

[0050] Figure 2One of the structural schematic diagrams of an encoder according to an embodiment of the utility model is shown;

[0051] Figure 3 A second structural schematic diagram of an encoder according to an embodiment of the utility model is shown.

[0052] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0053] 10' magnetoelectric encoder, 20' circuit board, 30' Hall chip, 40' magnetic element;

[0054] 100 encoder, 110 housing, 111 mounting cavity, 112 through hole, 113 opening, 114 base, 115 cover plate, 116 groove, 120 circuit board, 130 mounting shaft, 131 mounting groove, 140 magnetic member, 150 magnetic sensitive member, 160 connecting terminal, 170 first adhesive member, 180 bearing, 190 second adhesive member, 210 separator, 211 gasket. DETAILED DESCRIPTION

[0055] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0056] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0057] Refer to the following Figure 2 and Figure 3 The encoder 100 provided according to some embodiments of the present invention is described.

[0058] In one embodiment according to the present application, Figure 2 and Figure 3 As shown, an encoder 100 is proposed, and the encoder 100 includes: a shell 110, the shell 110 is provided with a connected installation cavity 111 and a through hole 112; a circuit board 120, which is arranged in the installation cavity 111; a mounting shaft 130, one end of the mounting shaft 130 extends into the installation cavity 111 through the through hole 112; a magnetic component 140, which is arranged at one end of the mounting shaft 130 located in the installation cavity 111; a magnetic sensitive component 150, which is arranged on a side of the circuit board 120 away from the magnetic component 140 and is electrically connected to the circuit board 120, and along the axial direction of the mounting shaft 130, the magnetic sensitive component 150 is opposite to the magnetic component 140.

[0059] The encoder 100 provided by the embodiment of the utility model includes a housing 110, a circuit board 120, a mounting shaft 130, a magnetic component 140 and a magnetic sensitive component 150. Specifically, the housing 110 is provided with a mounting cavity 111 and a through hole 112, and the through hole 112 is connected with the mounting cavity 111. One end of the mounting shaft 130 extends into the mounting cavity 111 through the through hole 112, and the magnetic component 140 is provided on one end of the mounting shaft 130 inserted into the mounting cavity 111.

[0060] The magnetic sensitive component 150 is electrically connected to the circuit board 120, and the magnetic sensitive component 150 is arranged on the side of the circuit board 120 away from the magnetic component 140, that is, the magnetic sensitive component 150 and the magnetic component 140 are distributed on opposite sides of the circuit board 120. Along the axial direction of the installation shaft 130, the magnetic sensitive component 150 is opposite to the magnetic component 140. It can be understood that along the axial direction of the installation shaft 130, there is a certain gap between the circuit board 120 and the magnetic component 140.

[0061] Specifically, when the installation shaft 130 rotates, the magnetic component 140 is driven to rotate synchronously, and the magnetic sensitive component 150 senses the angular displacement of the magnetic component 140. At the same time, the circuit board 120 processes and outputs an electrical signal, so that the rotation angle of the installation shaft 130 can be accurately measured.

[0062] It is understandable that since a certain distance needs to be maintained between the magnetic component 140 and the magnetic sensitive component 150, specifically, the distance is generally between 0.8 mm and 3 mm, setting the magnetic sensitive component 150 on the side of the circuit board 120 away from the magnetic component 140 is beneficial to reducing the gap between the circuit board 120 and the magnetic component 140, and making full use of the thickness space of the circuit board 120, thereby minimizing the height of the encoder 100, that is, reducing the overall axial size of the encoder 100, reducing the volume of the encoder 100, making the encoder 100 more refined, and thus bringing more possibilities for smaller servo motors, stepper motors, mechanical equipment, etc.

[0063] Optionally, the magnetic member 140 includes a solid radial magnet or a circular radial magnet, which can be configured according to actual needs.

[0064] Optionally, the magnetic sensor 150 includes a Hall chip or other magnetic sensor devices.

[0065] Optionally, the circuit board 120 is fixed to the housing 110 by AB glue, UV (Ultraviolet Rays) glue or screws.

[0066] Optionally, the installation shaft 130 is a blind hole shaft, that is, the installation shaft 130 is provided with a blind hole, and the blind hole is used to connect the motor shaft to wait for the installation device. Alternatively, the installation shaft 130 is a hollow shaft, that is, the installation shaft 130 is provided with a connecting hole, and the connecting hole is used to connect the motor shaft to wait for the installation device. Alternatively, the installation shaft 130 is a solid shaft, and the solid shaft is connected to the motor shaft to wait for the installation device through a coupling.

[0067] Optionally, the encoder 100 comprises a magneto-electric encoder.

[0068] In some embodiments, optionally, the magnetically sensitive member 150 is configured to be close to the central axis of the magnetic member 140 .

[0069] In this embodiment, the magnetic sensitive component 150 is limited to be disposed close to the central axis of the magnetic component 140 , that is, the magnetic sensitive component 150 is centered on the magnetic component 140 , which is beneficial to improving the measurement accuracy of the encoder 100 .

[0070] like Figure 2 and Figure 3 As shown, in some embodiments, optionally, the housing 110 is further provided with an opening 113, which is communicated with the mounting cavity 111; the encoder 100 also includes a connecting terminal 160, which is provided on the circuit board 120 and electrically connected to the circuit board 120, and the connecting terminal 160 is configured to be close to the opening 113.

[0071] In this embodiment, it is defined that the encoder 100 also includes a connection terminal 160. Specifically, the connection terminal 160 is disposed on the circuit board 120, and the connection terminal 160 is electrically connected to the circuit board 120. It can be understood that the connection terminal 160 is used to connect to an external device and to output an electrical signal.

[0072] The shell 110 is also provided with an opening 113, which is connected to the installation cavity 111. The connecting terminal 160 is arranged near the opening 113, so that it is convenient for the connecting terminal 160 to connect to external equipment while avoiding interference between the connecting terminal 160 and other structures in the installation cavity 111, so as to reasonably arrange the space in the installation cavity 111 and improve the space utilization rate in the installation cavity 111.

[0073] Optionally, along the axial direction of the mounting shaft 130, the connection terminal 160 is disposed on a side of the circuit board 120 away from the magnetic sensitive component 150, that is, the connection terminal 160 is disposed at the bottom of the circuit board 120. Alternatively, the connection terminal 160 is disposed on a side of the circuit board 120 away from the magnetic component 140, that is, the connection terminal 160 is disposed on the top of the circuit board 120. The specific arrangement can be made according to actual needs.

[0074] like Figure 2 and Figure 3As shown, in some embodiments, optionally, along the axial direction of the installation axis 130 , the connection terminal 160 is located on a side of the circuit board 120 away from the magnetic sensitive component 150 .

[0075] In this embodiment, the connection terminal 160 is defined as being disposed on a side of the circuit board 120 away from the magnetically sensitive component 150, that is, the connection terminal 160 is disposed at the bottom of the circuit board 120, thereby making full use of the free space formed between the circuit board 120 and the bottom wall of the mounting cavity 111, which is beneficial to further reducing the axial dimension of the encoder 100 and reducing the volume of the encoder 100.

[0076] like Figure 2 As shown, in some embodiments, optionally, a mounting groove 131 is provided at one end of the mounting shaft 130 , the mounting groove 131 is communicated with the mounting cavity 111 , and at least a portion of the magnetic member 140 is embedded in the mounting groove 131 along the axial direction of the mounting shaft 130 .

[0077] In this embodiment, a mounting groove 131 is provided at one end of the mounting shaft 130. Specifically, along the axial direction of the mounting shaft 130, at least a portion of the magnetic component 140 is embedded in the mounting groove 131, thereby reducing the space occupied by the magnetic component 140 in the axial direction, further reducing the overall axial size of the encoder 100, reducing the overall volume of the encoder 100, and making the encoder 100 more compact.

[0078] Furthermore, embedding at least a portion of the magnetic component 140 into the installation groove 131 is beneficial to improving the installation reliability of the magnetic component 140 and ensuring the measurement accuracy of the encoder 100 .

[0079] like Figure 2 As shown, in some embodiments, optionally, the encoder 100 further includes a first adhesive component 170 , and the magnetic component 140 is connected to the mounting shaft 130 via the first adhesive component 170 .

[0080] In this embodiment, it is defined that the encoder 100 also includes a first adhesive component 170. Specifically, the magnetic component 140 is connected to the mounting shaft 130 via the first adhesive component 170, which is beneficial to improving the installation efficiency between the magnetic component 140 and the mounting shaft 130, and is also beneficial to reducing the overall space occupied by the encoder 100 in the axial direction and reducing the overall volume of the encoder 100.

[0081] Optionally, the magnetic member 140 is connected to the groove wall of the installation groove 131 through the first adhesive member 170 .

[0082] Optionally, the first adhesive 170 includes anaerobic adhesive or AB adhesive.

[0083] Optionally, the magnetic member 140 is interference fit with the installation shaft 130 to achieve connection between the magnetic member 140 and the installation shaft 130 .

[0084] like Figure 2 As shown, in some embodiments, optionally, the encoder 100 also includes a bearing 180 and a second adhesive component 190, wherein the bearing 180 is arranged on the outer periphery of the mounting shaft 130 and is located at the through hole 112, and the mounting shaft 130 can drive the bearing 180 to rotate relative to the housing 110, and the bearing 180 is rotatably connected to the hole wall of the through hole 112 through the second adhesive component 190.

[0085] In this embodiment, it is defined that the encoder 100 also includes a bearing 180 and a second adhesive component 190. Specifically, the bearing 180 is sleeved on the outer side of the mounting shaft 130, and the bearing 180 is connected to the hole wall of the through hole 112 via the second adhesive component 190. Compared with the related art in which a step is set on the inner wall of the shell to axially limit the bearing, it is beneficial to further reduce the overall axial structural dimensions of the encoder 100 and reduce the overall volume of the encoder 100.

[0086] In addition, when the mounting shaft 130 is connected to the motor shaft of the motor, the mounting shaft 130 can drive the bearing 180 to rotate relative to the housing 110 .

[0087] Optionally, a limiting surface is provided on the outer wall of the installation shaft 130 , and along the axial direction of the installation shaft 130 , the bearing 180 abuts against the limiting surface to axially limit the bearing 180 and ensure reliable installation of the bearing 180 .

[0088] Optionally, the number of bearings 180 is at least two, and at least two bearings 180 are arranged axially along the mounting shaft 130, and the gap between any two adjacent bearings 180 is 0, that is, any two adjacent bearings 180 are in contact with each other, so as to further reduce the overall axial size of the encoder 100.

[0089] like Figure 2 As shown, in some embodiments, optionally, the number of bearings 180 is at least two, and at least two bearings 180 are arranged axially along the mounting shaft 130 ; the encoder 100 further includes a separator 210 , and the separator 210 is disposed between any two adjacent bearings 180 .

[0090] In this embodiment, the encoder 100 is defined to further include a separator 210. Specifically, the number of the bearings 180 is at least two, and at least two bearings 180 are arranged along the axial direction of the mounting shaft 130. The separator 210 is disposed between any two adjacent bearings 180 to prevent friction or slippage between the two adjacent bearings 180, thereby ensuring the measurement accuracy of the encoder 100 and extending the service life of the encoder 100.

[0091] like Figure 2 As shown, in some embodiments, optionally, the partition 210 includes a gasket 211 or a boss; in the case where the partition 210 includes a boss, the boss is provided on the housing 110 and is located in the through hole 112 .

[0092] In this embodiment, the separator 210 is defined to include a gasket 211, that is, the gasket 211 is disposed between any two adjacent bearings 180. Alternatively, the housing 110 is provided with a boss, the boss is located in the through hole 112, and the boss is located between any two adjacent bearings 180. The specific configuration can be based on actual needs.

[0093] Optionally, the thickness of the gasket 211 is between 0.2 mm and 0.5 mm, that is, the thickness of the gasket 211 is relatively thin, thereby being able to reduce the space occupied by at least two bearings 180 in the axial direction, which is beneficial to further reduce the volume of the encoder 100 .

[0094] like Figure 2 As shown, in some embodiments, optionally, the shell 110 includes a base 114 and a cover 115, wherein the base 114 is provided with a connected groove 116 and a through hole 112, and the cover 115 is arranged at the notch of the groove 116 and encloses the groove wall of the groove 116 to form an installation cavity 111.

[0095] In this embodiment, the shell 110 is defined to include a base 114 and a cover plate 115 . Specifically, the base 114 is provided with a groove 116 and a through hole 112 . The cover plate 115 is arranged at the notch of the groove 116 , and the cover plate 115 and the groove wall of the groove 116 enclose a mounting cavity 111 .

[0096] Optionally, the cross-sectional shape of the base 114 is circular.

[0097] Optionally, a sealing member is provided at the connection between the cover plate 115 and the base 114 to seal the connection between the cover plate 115 and the base 114. The sealing member includes anaerobic adhesive, so that the cover plate 115 and the base 114 can be sealed while being connected.

[0098] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0099] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0100] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An encoder, characterized in that: include: A housing, wherein the housing is provided with a mounting cavity and a through hole that are connected to each other; A circuit board is arranged in the installation cavity; An installation shaft, one end of which extends into the installation cavity through the through hole; A magnetic member, disposed at one end of the mounting shaft located in the mounting cavity; The magnetic sensitive component is arranged on a side of the circuit board away from the magnetic component and is electrically connected to the circuit board. Along the axial direction of the installation axis, the magnetic sensitive component is opposite to the magnetic component.

2. The encoder according to claim 1, characterized in that The magnetically sensitive component is arranged close to the central axis of the magnetic component.

3. The encoder according to claim 1 or 2, characterized in that The housing is also provided with an opening, and the opening is communicated with the installation cavity; The encoder further comprises: The connecting terminal is provided on the circuit board and electrically connected to the circuit board, and the connecting terminal is configured to be close to the opening.

4. The encoder according to claim 3, characterized in that Along the axial direction of the installation shaft, the connecting terminal is located on a side of the circuit board away from the magnetic sensitive component.

5. The encoder according to claim 1 or 2, characterized in that: A mounting groove is provided at one end of the mounting shaft, the mounting groove is communicated with the mounting cavity, and along the axial direction of the mounting shaft, at least a portion of the magnetic component is embedded in the mounting groove.

6. The encoder according to claim 1 or 2, characterized in that: Also includes: A first adhesive component, through which the magnetic component is connected to the mounting shaft.

7. The encoder according to claim 1 or 2, characterized in that: Also includes: A bearing, arranged on the outer periphery of the mounting shaft and located at the through hole, wherein the mounting shaft can drive the bearing to rotate relative to the housing; A second adhesive component, through which the bearing is rotatably connected to the hole wall of the through hole.

8. The encoder according to claim 7, characterized in that The number of the bearings is at least two, and at least two of the bearings are arranged along the axial direction of the mounting shaft; The encoder further comprises: A separator is arranged between any two adjacent bearings.

9. The encoder according to claim 8, characterized in that The separator includes a gasket or a boss; In the case where the partition comprises a boss, the boss is provided on the housing and is located in the through hole.

10. The encoder according to claim 1 or 2, characterized in that: The housing comprises: A base, wherein the base is provided with a groove and the through hole communicating with each other; The cover plate is arranged at the notch of the groove and is surrounded with the groove wall of the groove to form the installation cavity.

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