Magnetic encoder with magnetic flywheel structure

Abstract

The utility model discloses a kind of magnetic encoder using magnetic flywheel structure, including fixed disk, moving disk, flywheel;Several first magnetic elements are arranged axially in moving disk, more than one second magnetic element is arranged axially in fixed disk;When magnetic flywheel rotates slowly, first magnetic element, second magnetic element attraction, break and form paragraph feeling;When magnetic flywheel rotates extremely fast, the attraction of first magnetic element and second magnetic element is far less than the inertial centrifugal force of magnetic flywheel, magnetic flywheel continues to rotate and forms flywheel;PCB is installed on support, magnetic induction chip is arranged on PCB, for sensing the rotating direction and rotating number of first magnetic element on moving disk, complete vector encoding.The utility model magnetic flywheel structure is both the component part of encoder, and is important component for realizing flywheel paragraph feeling, the level phase difference of output always maintains 90 °, this perfect phase difference is extremely stable and reliable when encoding.

Description

Technical Field

[0001] This utility model relates to the field of encoders, and in particular to a magnetic encoder employing a magnetic flywheel structure. Background Technology

[0002] Many existing magnetic encoders use Hall angle sensors. Their flywheel structure includes a radially magnetized ring fixed on the flywheel and rotating with it. By installing a Hall angle sensor, the rotation direction and angle of the flywheel can be detected, and the corresponding electrical signal can be output. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a magnetic encoder with a magnetic flywheel structure.

[0004] The objective of this utility model is achieved through the following technical solution: A magnetic encoder employing a magnetic flywheel structure includes a bracket and a magnetic flywheel structure placed on the bracket; wherein, the magnetic flywheel structure includes a fixed disk with a central shaft, a moving disk, and a flywheel, wherein the moving disk and the flywheel are assembled and fixed to form a magnetic flywheel, or the moving disk and the flywheel are integrally formed to form a magnetic flywheel; the fixed disk with a central shaft is assembled with the central shaft and the magnetic flywheel to form the magnetic flywheel structure; Several first magnetic elements are axially arranged inside the moving disk, and one or more second magnetic elements are axially arranged inside the fixed disk. When the rotation speed of the magnetic flywheel is less than a first preset value, the first magnetic elements and the second magnetic elements continuously attract and disconnect to form a segmented effect. When the rotation speed of the magnetic flywheel is greater than the second preset value, the attraction force between the first magnetic elements and the second magnetic elements is much less than the inertial centrifugal force of the magnetic flywheel, and the magnetic flywheel continues to rotate rapidly to form a flywheel effect. Meanwhile, a PCB is also installed on the bracket, and a magnetic induction chip is set on the PCB to sense the rotation direction and number of rotations of the first magnetic element on the moving disk, and to complete vector encoding.

[0005] Furthermore, the N and S poles of adjacent first magnetic elements are spaced apart.

[0006] Furthermore, the magnetic induction chip contains a horizontally inductive magnetic induction element and a vertically inductive magnetic induction element, and the horizontally inductive magnetic induction element and the vertically inductive magnetic induction element are placed perpendicular to each other. Alternatively, the magnetic induction chip may be a first magnetic induction element and a second magnetic induction element packaged together, with the first magnetic induction element and the second magnetic induction element placed parallel to each other. Alternatively, the magnetic induction chip may be a first magnetic induction chip and a second magnetic induction chip that are packaged separately, and the first magnetic induction chip and the second magnetic induction chip are placed parallel to each other.

[0007] Furthermore, the first magnetic elements are arranged with the same polarity and are evenly distributed within the moving disk.

[0008] Furthermore, the magnetic induction chip comprises a first magnetic induction element and a second magnetic induction element packaged together, and the first magnetic induction element and the second magnetic induction element are placed parallel to each other; Alternatively, the magnetic induction chip may be a first magnetic induction chip and a second magnetic induction chip that are packaged separately, and the first magnetic induction chip and the second magnetic induction chip are placed parallel to each other.

[0009] Furthermore, the PCB is located at the bottom or side of the bracket.

[0010] Furthermore, a support spring and a bottom magnetic element are provided below the support, and side magnetic elements are provided on both sides of the support.

[0011] Furthermore, a downward tactile switch is provided below the bracket, and side tactile switches are provided on both sides of the bracket.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. The existing magnetic encoders mentioned above have high costs, and the flywheel structure that achieves the flywheel effect is independent of the encoder. The radial magnetic ring that realizes the encoding function does not play a role in the flywheel function, and the overall structure is relatively complex.

[0013] The magnetic flywheel and its structure are both components of the encoder and important parts for achieving the tactile feedback of the flywheel. The overall structure is ingeniously designed and occupies little space.

[0014] 2. This utility model uses a horizontally inductive magnetic induction element and a vertically inductive magnetic induction element, and the output level phase difference is always maintained at 90°. This perfect phase difference provides excellent stability and reliability during encoding. Attached Figure Description

[0015] Figure 1 This is an exploded view from the first perspective of the magnetic encoder using a magnetic flywheel structure in Example 1.

[0016] Figure 2 This is an exploded view from a second perspective of the magnetic encoder using a magnetic flywheel structure in Example 1.

[0017] Figure 3 This is a third-person exploded view of the magnetic encoder using a magnetic flywheel structure in Example 1.

[0018] Figure 4 This is a schematic diagram of the first-view structure of the magnetic encoder with a magnetic flywheel structure assembled in Example 1.

[0019] Figure 5 This is a second-view structural schematic diagram of the magnetic encoder with a magnetic flywheel structure assembled in Example 1.

[0020] Figure 6 The output waveform of the magnetic induction chip in Example 1 is shown in the diagram of the first magnetic element rotating with the flywheel.

[0021] Figure 7 This is an exploded view from the first perspective of the magnetic encoder using a magnetic flywheel structure in Example 4.

[0022] Figure 8 This is an exploded view from a second perspective of the magnetic encoder using a magnetic flywheel structure in Example 4.

[0023] Figure 9 This is a third-person exploded view of the magnetic encoder using a magnetic flywheel structure in Example 4.

[0024] Figure 10 This is a schematic diagram of the magnetic encoder with a magnetic flywheel structure assembled in Example 4 from a first-view perspective.

[0025] Figure 11 This is a schematic diagram of the magnetic encoder with a magnetic flywheel structure assembled in Example 4 from a second perspective.

[0026] The meanings of the reference numerals in the attached figures are as follows: 1-Bracket, 2-Central shaft, 3-Fixed disk, 4-Moving disk, 5-Flywheel, 6-First magnetic element, 7-Second magnetic element, 8-PCB, 9-Magnetic induction chip, 10-PCB slot, 11-Flexible circuit board, 12-Bracket spring, 13-Bottom magnetic element, 14-Side magnetic element, 15-Fixing device, 16-Magnetic induction chips on the left and right sides of the bracket, 17-Press-down tactile switch, 18-Side-press-down tactile switch. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto. Example 1

[0028] like Figures 1 to 6 A magnetic encoder employing a magnetic flywheel structure includes a bracket 1 and a magnetic flywheel structure placed on the bracket 1. The magnetic flywheel structure includes a fixed disk 3 with a central shaft 2, a moving disk 4, and a flywheel 5. The moving disk 4 and the flywheel 5 are assembled and fixed to form the magnetic flywheel, or the moving disk 4 and the flywheel 5 are integrally formed to form the magnetic flywheel. The fixed disk 3 with the central shaft 2 is assembled with the magnetic flywheel using the central shaft 2. Twenty-four first magnetic elements 6 are axially arranged inside the moving disk 4, and four second magnetic elements 7 are axially arranged inside the fixed disk 3. The moving disk 4 and the fixed disk 3 are coaxial, and the distance from the first magnetic element 6 to the moving disk 4 is equal to the distance from the second magnetic element 7 to the fixed disk 3. When the rotation speed of the magnetic flywheel is less than the first preset value (i.e., slow speed), the first magnetic elements 6 and the second magnetic elements 7 continuously attract and disconnect to create a segmented feel. When the rotation speed of the magnetic flywheel is greater than the second preset value (i.e., extremely fast speed), the attraction force between the first magnetic element 6 and the second magnetic element 7 is much less than the inertial centrifugal force of the magnetic flywheel, and the magnetic flywheel continues to rotate rapidly to create a flywheel effect. Meanwhile, a PCB8 is also installed on the bracket 1. A magnetic induction chip 9 is set on the PCB8 to sense the rotation direction and number of rotations of the first magnetic element 6 on the moving disk 4, and to complete vector encoding.

[0029] The adjacent first magnetic elements 6 are arranged with their N and S poles spaced apart.

[0030] The magnetic induction chip 9 contains a horizontally inductive magnetic induction element and a vertically inductive magnetic induction element, and the horizontally inductive magnetic induction element and the vertically inductive magnetic induction element are placed perpendicular to each other. For example... Figure 6 P represents the magnetic field curve sensed by the vertically inductive magnetic induction element, and V represents the magnetic field curve sensed by the horizontally inductive magnetic induction element. The black dashed line at the bottom represents the output level of the vertically inductive magnetic induction element, and the red solid line at the bottom represents the output level of the horizontally inductive magnetic induction element. The phase difference between the output levels of the vertically inductive magnetic induction element and the horizontally inductive magnetic induction element is always maintained at 90°. This perfect phase difference provides excellent stability and reliability during encoding.

[0031] Two or more second magnetic elements 7 are axially arranged inside the fixed disk 3. The relationship between them and the first magnetic element 6 on the moving disk 4 is that opposite poles attract each other, while the same poles repel each other.

[0032] When the magnetic flywheel rotates slowly, the first and second magnetic elements continuously attract and disconnect, creating a segmented effect. When the magnetic flywheel is stationary, the first and second magnetic elements are in an attracted state.

[0033] The PCB8 is disposed on the side of the bracket 1, and the side of the bracket 1 is provided with a PCB slot 10 for placing the PCB8. The PCB8 is connected to the MCU through a flexible circuit board 11.

[0034] The bracket 1 is equipped with a bracket spring 12 and a bottom magnetic element 13 at its lower part, and side magnetic elements 14 are respectively provided on both sides of the bracket 1. When the flywheel swings left and right, the side magnetic elements 14 on the left and right sides of the bracket 1 can trigger the magnetic induction chips 16 on the left and right sides of the bracket respectively; when the flywheel is pressed down, the bottom magnetic element 13 can trigger the magnetic induction chip at the bottom of the bracket.

[0035] The fixed disk 3 has a fixing device 15 on the side facing away from the moving disk 4 for assembly with the bracket 1. Example 2

[0036] Example 2 is identical to Example 1 except for the following content: The magnetic induction chip 9 consists of a first magnetic induction element and a second magnetic induction element packaged together, and the first magnetic induction element and the second magnetic induction element are placed parallel to each other. Example 3

[0037] Example 3 is identical to Example 1 except for the following content: The magnetic induction chip 9 consists of a first magnetic induction chip and a second magnetic induction chip, which are separately packaged and placed parallel to each other. Example 4

[0038] Example 4 is identical to Example 1 except for the following content: like Figures 7 to 11 The first magnetic elements 6 are arranged with the same polarity and are evenly distributed within the moving disk 4. Compared to Embodiment 1, the number of first magnetic elements 6 is reduced by at least half.

[0039] The magnetic induction chip 9 consists of a first magnetic induction element and a second magnetic induction element packaged together, and the first magnetic induction element and the second magnetic induction element are placed parallel to each other. Alternatively, the magnetic induction chip 9 may be a first magnetic induction chip and a second magnetic induction chip that are packaged separately, and the first magnetic induction chip and the second magnetic induction chip are placed parallel to each other. Example 5

[0040] Example 4 is identical to Example 1 except for the following content: The fixed disk has only one second magnetic element set axially. When the magnetic flywheel rotates slowly, the first and second magnetic elements continuously attract and disconnect to create a segmented effect; when the magnetic flywheel rotates continuously and rapidly, it creates a flywheel effect.

[0041] In Examples 1 to 5, such as Figure 11 A downward-pressing tactile switch 17 is provided at the bottom of the bracket 1, and side-pressing tactile switches 18 are provided on both sides of the bracket 1. At this time, it is not necessary to provide a bottom magnetic element 13 at the bottom of the bracket 1, and it is not necessary to provide side magnetic elements 14 on both sides of the bracket 1.

[0042] In embodiments 1 to 5, the magnetic induction chip 9 can be disposed on the front or back of the PCB8, with the front of the PCB8 facing the inside of the bracket 1 and the back of the PCB8 facing the outside of the bracket 1.

[0043] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A magnetic encoder employing a magnetic flywheel structure, characterized by: The system includes a support frame and a magnetic flywheel structure placed on the support frame. The magnetic flywheel structure includes a moving disk and a flywheel, with a plurality of first magnetic elements axially arranged inside the moving disk. The moving disk and the flywheel are assembled and fixed to form a magnetic flywheel, or the moving disk and the flywheel are integrally formed to form a magnetic flywheel. Meanwhile, a PCB is also installed on the bracket, and a magnetic induction chip is set on the PCB to sense the rotation direction and number of rotations of the first magnetic element on the moving disk, and to complete vector encoding.

2. The magnetic encoder employing a magnetic flywheel structure according to claim 1, characterized in that: The N and S poles of adjacent first magnetic elements are spaced apart.

3. The magnetic encoder employing a magnetic flywheel structure according to claim 2, characterized in that: The magnetic induction chip contains a horizontally inductive magnetic induction element and a vertically inductive magnetic induction element. Alternatively, the magnetic induction chip may be a first magnetic induction element and a second magnetic induction element packaged together, with the first magnetic induction element and the second magnetic induction element placed parallel to each other. Alternatively, the magnetic induction chip may be a first magnetic induction chip and a second magnetic induction chip that are packaged separately, and the first magnetic induction chip and the second magnetic induction chip are placed parallel to each other.

4. The magnetic encoder employing a magnetic flywheel structure according to claim 1, characterized in that: The first magnetic elements are arranged with the same polarity and are evenly distributed within the moving disk.

5. The magnetic encoder employing a magnetic flywheel structure according to claim 4, characterized in that: The magnetic induction chip consists of a first magnetic induction element and a second magnetic induction element packaged together, and the first magnetic induction element and the second magnetic induction element are placed parallel to each other. Alternatively, the magnetic induction chip may be a first magnetic induction chip and a second magnetic induction chip that are packaged separately, and the first magnetic induction chip and the second magnetic induction chip are placed parallel to each other.

6. The magnetic encoder employing a magnetic flywheel structure according to any one of claims 1 to 5, characterized in that: The PCB is located at the bottom or side of the bracket.

7. The magnetic encoder employing a magnetic flywheel structure according to any one of claims 1 to 5, characterized in that: The bracket is equipped with a bracket spring and a bottom magnetic element at the bottom, and side magnetic elements are respectively provided on both sides of the bracket.

8. The magnetic encoder employing a magnetic flywheel structure according to any one of claims 1 to 5, characterized in that: A downward-pressing tactile switch is installed at the bottom of the bracket, and side-pressing tactile switches are installed on both sides of the bracket.

9. The magnetic encoder employing a magnetic flywheel structure according to any one of claims 1 to 5, characterized in that: The magnetic flywheel structure includes a fixed disk with a central shaft, which is assembled with the central shaft and the magnetic flywheel to form the magnetic flywheel structure; one or more second magnetic elements are axially arranged inside the fixed disk.

Images