A magnetic encoder with a sawtooth flywheel structure

Abstract

The utility model discloses a kind of magnetic encoder using sawtooth flywheel structure, including support, sawtooth flywheel structure on the support;Sawtooth flywheel structure includes fixed disk with central shaft, sawtooth plastic disc, sawtooth flywheel, sawtooth plastic disc and sawtooth flywheel are assembled as sawtooth flywheel moving body with dislocation cooperation;When sawtooth flywheel moving body rotates slowly, the second sawtooth of sawtooth flywheel and the second magnetic element of fixed disk are constantly attracted, disconnected and form paragraph feeling;When sawtooth flywheel moving body rotates extremely fast, the attraction between the two is far less than its inertial centrifugal force, and its high-speed rotation forms flywheel effect.The magnetic induction chip with first magnetic element can capture the presence or absence of second sawtooth, thereby generating positive and negative rotation vector signal.This kind of magnetic encoder can be made into sawtooth shape only by making the inner surface of flywheel of soft magnetic material, with simple structure, simple process, simple assembly, paragraph feeling and flywheel function.

Description

Technical Field

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

[0002] Currently, flywheel encoders on the market typically have a magnetic sensing element installed on the flywheel to sense the magnetic sensing chip on the PCB. This process is complex and involves complicated assembly and manufacturing. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a magnetic encoder with a sawtooth flywheel structure. This invention eliminates the need for magnetic components on the flywheel to cooperate with the magnetic induction chip; it only requires making the flywheel from a soft magnetic material (such as silicon steel) and cutting sawtooth-shaped teeth on it. The presence or absence of the second sawtooth can then be identified by a magnetic induction chip with magnetic components to generate encoded vector information.

[0004] The objective of this utility model is achieved through the following technical solution: A magnetic encoder employing a sawtooth flywheel structure includes a bracket and a sawtooth flywheel structure placed on the bracket. The sawtooth flywheel structure includes a fixed disk with a central shaft, a sawtooth plastic disk, and a sawtooth flywheel. Multiple first sawtooths are evenly distributed on the outer surface of the sawtooth plastic disk, and multiple second sawtooths are evenly distributed on the inner surface of the sawtooth flywheel. The sawtooth plastic disk and the sawtooth flywheel are assembled in a staggered configuration to form a sawtooth flywheel moving body. The fixed disk with the central shaft is assembled into the sawtooth flywheel structure using the central shaft and the sawtooth flywheel moving body. The fixed disk contains several second magnetic elements; when the rotation speed of the sawtooth flywheel is less than the first preset value, the second sawtooth and the second magnetic elements continuously attract and disconnect to form a segmented effect; when the rotation speed of the sawtooth flywheel is less than the second preset value, the attraction force between the second sawtooth and the second magnetic elements is much less than the inertial centrifugal force of the sawtooth flywheel, and the sawtooth flywheel rotates rapidly to form a flywheel effect. The second sawtooth is made of soft magnetic material; a PCB is mounted on the bracket, and a magnetic induction chip with a first magnetic element is set on the PCB; the magnetic induction chip with the first magnetic element captures the presence or absence of the second sawtooth, thereby generating forward and reverse vector signals.

[0005] Furthermore, the magnetic induction chip and the first magnetic element are packaged together for use to identify the presence or absence of the second sawtooth, and then output vector encoded information.

[0006] Furthermore, the PCB is located at the bottom or side of the bracket.

[0007] Furthermore, a support spring and a bottom magnetic element are provided below the support, and lateral magnetic elements are provided on both sides of the support. The left and right swaying of the support can cause the lateral magnetic elements on the left and right sides to sway left and right, thereby triggering the magnetic induction chips on the left and right sides of the support; pressing down on the support can cause the bottom magnetic element to sway, thereby triggering the bottom magnetic induction chip.

[0008] Furthermore, a downward-pressing tactile switch is provided at the bottom of the bracket, and side-pressing tactile switches are provided on both sides of the bracket. The bracket can be swung left and right to activate the mechanical switches on the left and right sides (i.e., the side-pressing tactile switches), and the bracket can be pressed down to activate the mechanical switch at the bottom (i.e., the downward-pressing tactile switch).

[0009] Furthermore, the soft magnetic material includes silicon steel, permalloy, iron-silicon-aluminum alloy, and iron-cobalt alloy.

[0010] Furthermore, the inner surfaces of the fixed disk and the serrated plastic disk are provided with cavities, which, when assembled with the serrated flywheel, make the outer surface of the serrated flywheel structure smooth.

[0011] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. This utility model directly utilizes a magnetic induction chip with magnetic elements to identify the presence or absence of the second sawtooth, thereby generating coded vector information to determine the direction and distance of flywheel rotation, making the function reliable.

[0012] 2. This utility model only requires making the flywheel into a soft magnetic material (such as silicon steel) and making the soft magnetic material into a sawtooth shape, which is a simple process.

[0013] 3. The serrated flywheel of this invention, in conjunction with the second magnetic element on the fixed disk, will directly engage and disengage at slow speeds, thus producing a damping and tactile feedback. During the extremely rapid rotation of the serrated flywheel, the attraction force between the multiple evenly arranged second serrations on the inner surface of the serrated flywheel and the second magnetic element on the fixed disk is much less than the inertial centrifugal force of the serrated flywheel, allowing the serrated flywheel to continue rotating at high speed, creating a flywheel effect.

[0014] 4. The sawtooth flywheel of this utility model has two functions: it acts as a damper in the flywheel and provides the presence or absence of the second sawtooth in the encoding to generate vector encoding.

[0015] 5. This utility model directly uses silicon steel sheets to make a sawtooth flywheel, which is easy to process and has low cost.

[0016] 6. The serrated plastic disc and the serrated flywheel of this utility model are misaligned and assembled to form a serrated flywheel moving body. After the two are combined, the serrated plastic disc fills the gap of the serrated flywheel, making the serrated flywheel moving body have a compact structure and a smooth and beautiful appearance. Attached Figure Description

[0017] Figure 1 This is an exploded view from the first perspective of the magnetic encoder with a sawtooth flywheel structure used in Example 1.

[0018] Figure 2 This is an exploded view from a second perspective of the magnetic encoder with a sawtooth flywheel structure used in Example 1.

[0019] Figure 3 This is a third-person exploded view of the magnetic encoder with a sawtooth flywheel structure in Example 1.

[0020] Figure 4 This is an exploded view from the fourth perspective of the magnetic encoder with a sawtooth flywheel structure used in Example 1.

[0021] Figure 5 This is a schematic diagram of the structure of the magnetic induction chip and the first magnetic element on the PCB in Example 1.

[0022] Figure 6 This is a schematic diagram of the magnetic encoder with a sawtooth flywheel structure assembled in Example 1 from a first-view perspective.

[0023] Figure 7 This is a schematic diagram of the magnetic encoder with a sawtooth flywheel structure assembled in Example 1 from a second perspective.

[0024] Figure 8 This is a third-view structural diagram of the magnetic encoder with a sawtooth flywheel structure assembled in Example 1.

[0025] Figure 9 This is a schematic diagram of the assembled magnetic encoder using a sawtooth flywheel structure in Example 2.

[0026] The meanings of the reference numerals in the attached figures are as follows: 1-Bracket, 2-Central shaft, 3-Fixed disk, 4-Serrated plastic disk, 5-Serrated flywheel, 6-First serration, 7-Second serration, 8-Second magnetic element, 9-PCB, 10-Magnetic induction chip, 11-First magnetic element, 12-Bracket spring, 13-Bottom magnetic element, 14-Side magnetic element, 15-Magnetic induction chips on the left and right sides of the bracket, 16-Press-down tactile switch, 17-Side-press-down tactile switch, 18-Flexible circuit board, 19-PCB slot, 20-Fixing sleeve. 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 8As shown, a magnetic encoder employing a sawtooth flywheel structure includes a bracket 1 and a sawtooth flywheel structure placed on the bracket 1. The sawtooth flywheel structure includes a fixed disk 3 with a central shaft 2, a sawtooth plastic disk 4, and a sawtooth flywheel 5. The outer surface of the sawtooth plastic disk 4 is uniformly provided with a plurality of first sawtooths 6, and the inner surface of the sawtooth flywheel 5 is uniformly provided with a plurality of second sawtooths 7. The sawtooth plastic disk 4 and the sawtooth flywheel 5 are assembled in a staggered manner to form a sawtooth flywheel moving body. The fixed disk 3 with the central shaft 2 is assembled into a sawtooth flywheel structure using the central shaft 2 and the sawtooth flywheel moving body. Multiple second saw teeth 7 are made of silicon steel, and several second magnetic elements 8 are set inside the fixed disk 3; when the rotation speed of the saw tooth flywheel is less than the first preset value (i.e., slow speed), the second saw teeth 7 and the second magnetic elements 8 continuously attract and disconnect to form a segmented feeling; when the rotation speed of the saw tooth flywheel is less than the second preset value (i.e., extremely fast speed), the attraction force between the second saw teeth 7 and the second magnetic elements 8 is much less than the inertial centrifugal force of the saw tooth flywheel, and the saw tooth flywheel rotates rapidly to form a flywheel; A PCB9 is mounted on the bracket 1. A magnetic induction chip 10 with a first magnetic element 11 is set on the PCB9. The magnetic induction chip 10 is fixed to the first magnetic element 11 by a fixing sleeve 20. The magnetic induction chip 10 with the first magnetic element 11 captures the presence or absence of the second sawtooth 7 made of silicon steel, thereby generating forward and reverse vector signals.

[0029] The magnetic induction chip 10 and the first magnetic element 11 are packaged together and used to identify the presence or absence of the second sawtooth 7, and then output vector encoded information.

[0030] The PCB9 is disposed on the side of the bracket 1, and the side of the bracket 1 is provided with a PCB slot 19 for placing the PCB9. The PCB9 is connected to the MCU through a flexible circuit board 18.

[0031] The bracket 1 is provided with a bracket spring 12 and a bottom magnetic element 13 at its bottom, and side magnetic elements 14 are provided on both sides of the bracket 1. The bracket 1 can swing left and right, which can cause the side magnetic elements 14 on the left and right sides of the bracket 1 to swing left and right, thereby triggering the magnetic induction chips 15 on the left and right sides of the bracket; the bracket 1 can be pressed down, which can cause the bottom magnetic element 13 to move, thereby triggering the bottom magnetic induction chip. Example 2

[0032] Except for the following content, which differs from that of Example 1, all other contents of this embodiment are the same as those of Example 1.

[0033] like Figure 9As shown, a downward tactile switch 16 is provided below the bracket 1, and side tactile switches 17 are provided on both sides of the bracket 1. The bracket 1 can touch the mechanical switches on the left and right sides (i.e., the side tactile switches 17) by swinging it left and right, and the bracket 1 can touch the bottom mechanical switch (i.e., the downward tactile switch 16) by pressing it down.

[0034] In Examples 1 and 2, in addition to silicon steel, the second sawtooth can also be made of soft magnetic materials such as permalloy, iron-silicon-aluminum alloy, and iron-cobalt alloy, as long as it supports the fluxgate effect, the requirements can be met.

[0035] In Examples 1 and 2, cavities are provided on the inner surfaces of both the fixed disk and the serrated plastic disk. After assembly with the serrated flywheel, the outer surface of the serrated flywheel structure is smooth, resulting in a more aesthetically pleasing overall appearance. The cavity of the fixed disk is larger to accommodate the serrated plastic disk during assembly, while the cavity of the serrated plastic disk is smaller to accommodate the central shaft and related components.

[0036] 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 sawtooth flywheel structure, characterized in that: The device includes a bracket and a sawtooth flywheel structure placed on the bracket. The sawtooth flywheel structure includes a sawtooth flywheel, and a plurality of second sawtooths are uniformly arranged on the inner surface of the sawtooth flywheel. The second sawtooths are made of soft magnetic material. A PCB is mounted on the bracket, and a magnetic induction chip with a first magnetic element is set on the PCB. The magnetic induction chip with the first magnetic element detects the presence or absence of the second sawtooths, thereby generating forward and reverse vector signals.

2. The magnetic encoder with a sawtooth flywheel structure according to claim 1, characterized in that: The magnetic induction chip and the first magnetic element are packaged together and used to identify the presence or absence of the second sawtooth, and then output vector encoded information.

3. The magnetic encoder with a sawtooth flywheel structure according to claim 1, characterized in that: The PCB is located at the bottom or side of the bracket.

4. The magnetic encoder with a sawtooth flywheel structure according to claim 1, 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.

5. The magnetic encoder with a sawtooth flywheel structure according to claim 1, 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.

6. The magnetic encoder with a sawtooth flywheel structure according to claim 1, characterized in that: The soft magnetic materials include silicon steel, permalloy, iron-silicon-aluminum alloy, and iron-cobalt alloy.

7. The magnetic encoder with a sawtooth flywheel structure according to claim 1, characterized in that: The serrated flywheel structure also includes a fixed disk with a central shaft and a serrated plastic disk. The outer surface of the serrated plastic disk is uniformly provided with multiple first serrations. The serrated plastic disk and the serrated flywheel are assembled in a staggered manner to form a serrated flywheel moving body. The fixed disk with a central shaft is assembled with the central shaft and the serrated flywheel moving body to form a serrated flywheel structure. Several second magnetic elements are provided inside the fixed disk.

8. The magnetic encoder with a sawtooth flywheel structure according to claim 7, characterized in that: The inner surfaces of the fixed disk and the serrated plastic disk are both provided with cavities, which, when assembled with the serrated flywheel, make the outer surface of the serrated flywheel structure smooth.

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