Motor encoder assembling method, motor encoder and sewing machine

Abstract

The invention discloses an assembling method of a motor encoder, the motor encoder and a sewing machine, and relates to the technical field of sewing machines, and the assembling method comprises the following steps: firstly, installing an unmagnetized magnetic block in a mounting seat, then adjusting the position of the magnetic block until the central symmetry plane of the N pole of the magnetic block coincides with the central symmetry plane of a positioning groove formed in the mounting seat, and finally, assembling the magnetic block in the mounting seat; then the magnetic block is fixed in the mounting seat, and then the position of the mounting seat is adjusted until the positioning groove is matched with the set positioning block; and finally, the magnetic block is magnetized according to the preset magnetizing direction, and the preset magnetizing direction is consistent with the center line of the positioning groove, so that the preset magnetizing direction is aligned with the N pole. Therefore, according to the assembling method, the magnetic block is installed firstly and then magnetized, so that the magnetizing direction is consistent with the N pole of the magnetic block, the position of the magnetic block is effectively controlled to coincide with the zero position of the rotor shaft of the motor, the factory zero position calibration problem of an existing motor encoder is effectively solved, manual calibration is omitted, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sewing machines, and in particular to an assembling method of a motor encoder, a motor encoder and a sewing machine. Background Art

[0002] With the improvement of automation and processing accuracy, sewing machine motors are usually equipped with encoders. Considering that the angle of the photoelectric encoder is easily affected by external oil, dust, vibration, etc., the use of a magnetoelectric encoder in the sewing machine motor can avoid the above problems. However, the assembly method of the existing magnetoelectric encoder is unreasonable, and the magnetic pole position of the magnet assembly cannot be accurately aligned with the motor zero position, resulting in the motor zero position needing manual calibration every time it leaves the factory, which increases labor costs and is not conducive to controlling manufacturing costs. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an assembly method of a motor encoder, a motor encoder and a sewing machine, wherein the magnet is first installed and then magnetized, thereby solving the technical problem of high manufacturing cost caused by manual calibration of the motor zero position.

[0004] To achieve the above object, the present invention provides a method for assembling a motor encoder, the steps comprising:

[0005] Install the unmagnetized magnetic block into the mounting base;

[0006] Adjust the position of the magnetic block until the central symmetric plane of the N pole of the magnetic block coincides with the central symmetric plane of the positioning groove provided on the mounting seat;

[0007] Secure the magnet in the mount;

[0008] Adjust the position of the mounting seat until the positioning groove matches the set positioning block;

[0009] The magnetic block is magnetized according to a preset magnetization direction, and the preset magnetization direction is consistent with the center line of the positioning slot.

[0010] Preferably, the step of placing the unmagnetized magnetic block into the mounting seat comprises:

[0011] Align the conical head of the magnet coaxially with the conical groove of the mounting base;

[0012] Then install the conical head into the conical groove.

[0013] Preferably, fixing the magnetic block in the mounting seat is specifically performed by filling glue between the magnetic block and the mounting groove.

[0014] Preferably, magnetizing the magnetic block according to a preset magnetizing direction specifically comprises magnetizing the magnetic block according to a preset magnetizing direction using a magnetizer.

[0015] The present invention also provides a motor encoder, which is applied to the assembly method of any of the above-mentioned motor encoders, including a mounting base with a positioning groove and a magnetic block fixed in the mounting base; when the positioning groove cooperates with the positioning block provided by the fixing fixture, the central symmetry plane of the N pole of the magnetic block coincides with the central symmetry plane of the positioning groove, and the preset magnetization direction is consistent with the center line of the positioning groove.

[0016] Preferably, a conical head is provided at the end of the magnetic block, a conical groove is provided at the end of the mounting seat, and the conical head is coaxially fixed in the conical groove.

[0017] Preferably, the conical head is cemented in the conical groove.

[0018] Preferably, the mounting base is fixedly mounted on one end of the rotor shaft of the motor, and further comprises a circuit board and a control chip fixedly mounted on the circuit board. The control chip is coaxial with the magnetic block and the two maintain a set distance along the axial direction.

[0019] Preferably, it also includes a support frame for fixing to the motor housing, and the circuit board is fixed to the support frame.

[0020] The present invention further provides a sewing machine, comprising any one of the motor encoders described above.

[0021] Compared with the background technology, the assembly method of the motor encoder provided by the present invention includes the following steps: firstly, the unmagnetized magnetic block is installed into the mounting seat, and then the position of the magnetic block is adjusted until the central symmetric plane of the N pole of the magnetic block coincides with the central symmetric plane of the positioning groove provided in the mounting seat, and then the magnetic block is fixed in the mounting seat, and then the position of the mounting seat is adjusted again until the positioning groove matches the set positioning block; finally, the magnetic block is magnetized according to the preset magnetization direction, and the preset magnetization direction is consistent with the center line of the positioning groove, so that the preset magnetization direction is aligned with the N pole. Therefore, the assembly method of the present invention adopts the method of installing the magnetic block first and then magnetizing, so that the magnetization direction is consistent with the N pole of the magnetic block, thereby effectively controlling the position of the magnetic block to coincide with the zero position of the rotor shaft of the motor, effectively solving the problem of zero position calibration of the existing motor encoder at the factory, eliminating manual calibration, and helping to reduce manufacturing costs.

[0022] The motor encoder and sewing machine provided by the present invention have the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1A flowchart of a method for assembling a motor encoder provided by a specific embodiment of the present invention;

[0025] Figure 2 A state diagram of a motor encoder provided by a specific embodiment of the present invention being installed on a motor;

[0026] Figure 3 for Figure 2 Exploded view of the middle mount and magnetic block;

[0027] Figure 4 for Figure 2 Schematic diagram of the position control of the middle mounting base and the magnetic block.

[0028] The reference numerals are as follows:

[0029] The mounting base 1 , the positioning groove 11 , the conical groove 12 , the magnetic block 2 , the conical head 21 , the rotor shaft 3 , the circuit board 4 , the control chip 5 and the supporting frame 6 . DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The motor encoder type in this article can be a magnetoelectric encoder.

[0033] The embodiment of the present invention discloses a method for assembling a motor encoder, such as Figure 1 As shown, the steps include:

[0034] S1. Install the unmagnetized magnetic block into the mounting seat. It should be noted that the magnetic block is installed into the mounting seat before being magnetized, which is conducive to the subsequent precise adjustment of the position of the magnetic block, avoiding large deviations in the position of the magnetic block due to magnetic interference, thereby reducing assembly errors and improving assembly accuracy.

[0035] The steps of installing the unmagnetized magnetic block into the mounting seat include: aligning the conical head of the magnetic block coaxially with the conical groove of the mounting seat; and then installing the conical head in the conical groove, and relying on the special structure between the conical head and the conical groove, ensuring the coaxiality between the magnetic block and the mounting groove, thereby improving the accuracy consistency of the motor encoder. Of course, the conical head and the conical groove can be replaced by other similar structures such as cylindrical structures or triangular prisms, which can still ensure the coaxiality between the magnetic block and the mounting seat.

[0036] S2. Adjust the position of the magnetic block until the central symmetric plane of the N pole of the magnetic block coincides with the central symmetric plane of the positioning groove of the mounting seat. The cross-sections of the N pole and the S pole of the magnetic block are both semicircular, and the combination of the two forms a circular structure. Figure 4 Based on the current view, the central symmetry plane of the N pole specifically refers to the plane where the Y axis is located.

[0037] S3, fix the magnetic block in the mounting seat. The specific method of fixing the magnetic block in the mounting seat is to fill adhesive between the magnetic block and the mounting groove, so that the magnetic block is fixed in the mounting seat by the adhesive. Of course, the fixing method of the magnetic block is not limited to this.

[0038] S4. Adjust the position of the mounting seat until the positioning groove matches the set positioning block to achieve the position of the mounting seat. The positioning block is provided on the fixing fixture, and the fixing fixture is used to fix the mounting seat. The structure and working principle of the fixing fixture can refer to the prior art. The positioning block can be a rectangular protrusion, which matches the positioning groove. Of course, both the positioning groove and the positioning block can be cylindrical, or other similar structures, which does not affect the purpose of the present invention.

[0039] S5. Magnetize the magnetic block according to the preset magnetizing direction. The preset magnetizing direction is consistent with the center line of the positioning slot, ensuring that the preset magnetizing direction is aligned with the N pole. Figure 4 The direction indicated by the Y axis in the middle. Magnetizing the magnetic block according to the preset magnetizing direction specifically includes magnetizing the magnetic block according to the preset magnetizing direction using a magnetizing machine. Of course, the magnetizing method is not limited to this.

[0040] To sum up, the assembly method of the motor encoder provided by the present invention adopts the method of installing the magnetic block first and then magnetizing, so that the magnetizing direction is consistent with the N pole of the magnetic block, thereby effectively controlling the position of the magnetic block to coincide with the zero position of the rotor shaft of the motor, effectively solving the problem of factory zero position calibration of the existing motor encoder, eliminating manual calibration, and helping to reduce manufacturing costs.

[0041] The embodiment of the present invention also discloses a motor encoder, such as Figures 2 to 4 As shown, the assembly method applied to the above motor encoder includes a mounting seat 1 having a positioning groove 11 and a magnetic block 2 fixed in the mounting seat 1. When the positioning groove 11 is matched with the positioning block provided by the fixing fixture, the central symmetric plane of the N pole of the magnetic block 2 coincides with the central symmetric plane of the positioning groove 11, and the preset magnetizing direction is consistent with the center line of the positioning groove 11, so that the preset magnetizing direction is aligned with the N pole and then the magnetizing direction is consistent with the N pole of the magnetic block 2, thereby effectively controlling the position of the magnetic block 2 to coincide with the zero position of the rotor shaft 3 of the motor, effectively solving the problem of factory zero position calibration of the existing motor encoder, eliminating manual calibration, and helping to reduce manufacturing costs.

[0042] The end of the magnetic block 2 is provided with a conical head 21, and the end of the mounting seat 1 is provided with a conical groove 12. The conical head 21 is coaxially fixed in the conical groove 12 to ensure that the magnetic block 2 is coaxial with the mounting seat 1. The conical head 21 is glued in the conical groove 12. Of course, the installation method between the magnetic block 2 and the mounting seat 1 is not limited to this.

[0043] The mounting base 1 is fixed to one end of the rotor shaft 3 of the motor. Specifically, the mounting base 1 can be fixed to the end of the rotor shaft 3 by screws. The motor encoder also includes a circuit board 4 and a control chip 5 fixed to the circuit board 4. The control chip 5 is coaxial with the magnetic block 2 and the two maintain a set distance along the axial direction. When the magnetic block 2 rotates with the rotor, the magnetic block 2 generates a magnetic field signal. The control chip 5 receives the magnetic induction signal and converts the magnetic induction signal into an angle signal, and then outputs the angle signal. The working principle of the control chip 5 can refer to the prior art and will not be described in detail here.

[0044] The motor encoder further comprises a support frame 6 for fixing to the motor housing. The circuit board 4 is fixed to the support frame 6 to fix the control chip 5 so that the magnetic block 2 can rotate relative to the control chip 5 .

[0045] The embodiment of the present invention further discloses a sewing machine, comprising the above motor encoder, which has the same beneficial effects.

[0046] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0047] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A method for assembling a motor encoder, characterized in that the steps include: Install the unmagnetized magnetic block into the mounting base; Adjusting the position of the magnetic block until the central symmetric plane of the N pole of the magnetic block coincides with the central symmetric plane of the positioning groove provided on the mounting seat; Fixing the magnetic block in the mounting seat; Adjusting the position of the mounting seat until the positioning groove matches the set positioning block; The magnetic block is magnetized according to a preset magnetization direction, and the preset magnetization direction is consistent with the center line of the positioning groove.

2. The method for assembling a motor encoder according to claim 1, characterized in that: The step of installing the unmagnetized magnetic block into the mounting seat comprises: Coaxially aligning the conical head of the magnetic block with the conical groove of the mounting seat; Then the conical head is installed in the conical groove.

3. The method for assembling a motor encoder according to claim 1, characterized in that: The step of fixing the magnetic block in the mounting seat specifically includes filling glue between the magnetic block and the mounting groove.

4. The method for assembling a motor encoder according to claim 1, characterized in that: The magnetizing the magnetic block according to the preset magnetizing direction specifically comprises magnetizing the magnetic block according to the preset magnetizing direction by using a magnetizer.

5. A motor encoder, applied to the assembly method of the motor encoder according to any one of claims 1 to 4, characterized in that: The invention comprises a mounting seat (1) having a positioning groove (11) and a magnetic block (2) fixed in the mounting seat (1); when the positioning groove (11) matches with a positioning block provided in a fixing fixture, the central symmetric plane of the N pole of the magnetic block (2) coincides with the central symmetric plane of the positioning groove (11), and the preset magnetizing direction is consistent with the center line of the positioning groove (11).

6. The motor encoder according to claim 5, characterized in that: The end of the magnetic block (2) is provided with a conical head (21), the end of the mounting seat (1) is provided with a conical groove (12), and the conical head (21) is coaxially fixed in the conical groove (12).

7. The motor encoder according to claim 6, characterized in that: The conical head (21) is fixed in the conical groove (12).

8. The motor encoder according to claim 5, characterized in that: The mounting seat (1) is fixedly mounted on one end of a rotor shaft (3) of the motor, and further comprises a circuit board (4) and a control chip (5) fixedly mounted on the circuit board (4); the control chip (5) is coaxial with the magnetic block (2) and the two maintain a set distance in the axial direction.

9. The motor encoder according to claim 5, characterized in that: It also comprises a support frame (6) for fixing to the motor housing, and the circuit board (4) is fixed to the support frame (6).

10. A sewing machine, characterized in that: The motor encoder comprises the motor encoder as described in any one of claims 5 to 9.

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