Grating electromagnet, grating inductor and grating capacitor combined encoder and coded disc assembly

Abstract

The utility model relates to a grating electromagnetic / inductance / capacitance combined encoder and a code disc assembly, and the encoder is characterized in that an induction triggering member is embedded on a supporting member / grating disc of the code disc assembly, and can trigger a zero position sensor on a stator assembly of the encoder to generate a zero position signal; therefore, the encoder can conveniently provide zero signal output. Moreover, a distance is reserved between the induction triggering piece and the mounting hole of the coded disc assembly, so that the induction triggering piece and the coded disc assembly are assembled together and do not need to be attached to a main shaft of a rotor or a main shaft of a motor, and the grating electromagnetic / inductance / capacitance combined encoder and the coded disc assembly are high in universality.

Description

Technical Field

[0001] This utility model relates to a combination encoder and code disk assembly of grating electromagnetic, grating inductive, and grating capacitive encoders, belonging to the field of encoder technology. Background Technology

[0002] The A-phase and B-phase of an encoder are two orthogonal pulse signals in an incremental encoder, with a 90-degree phase difference between them. By detecting the phase relationship between the A-phase and B-phase signals, the control system can determine the rotation direction of the object. In addition, the encoder typically provides a Z-phase output (Z+ and Z-), called the zero-position signal or pointer pulse. The Z-phase generates a sudden change signal when the rotating shaft passes a specific position, indicating the encoder's zero-point position, which is particularly important for applications requiring precise position control. Normally, acquiring the A-phase, B-phase, and Z-phase signals is accomplished by a single sensing chip. This product is simple in form and provides stable signals, but chips supporting three-channel output are expensive and mostly imported. Domestic chips generally only support two outputs, A-phase and B-phase. To support Z-phase signal output in applications, other methods are needed to generate the Z-phase signal, such as photoelectric or magnetoelectric methods. While existing technologies include photoelectric-magnetic-electric composite encoders, which utilize a technique of adding a magnetoelectric output signal as the Z-phase signal to a photoelectric encoder (such as the encoder in Chinese patent application CN202311117140.2), which adds a magnetoelectric signal as the Z-phase signal output by placing a magnet at the end of the rotor shaft, this method requires the use of the rotor shaft or the motor shaft, making it unsuitable for shaftless encoders and limiting its applicability. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a combination encoder and code disk assembly of grating electromagnetic, grating inductive and grating capacitive encoders, which enables the encoder to conveniently provide zero-position signal output.

[0004] To achieve the above objectives, this utility model provides an encoder code disk assembly, including a support member and a grating disk coaxially fixed together. The support member has a mounting hole at its center for connecting a motor shaft. A sensing trigger is also embedded on the support member / grating disk. The sensing trigger is used to trigger a zero-position sensor on the encoder stator assembly to generate a zero-position signal. There is a distance between the sensing trigger and the mounting hole.

[0005] Based on the encoder disk assembly of the present invention described above, as a first preferred embodiment of the present invention: the support member has a flange for mounting the grating disk, the upper surface of the flange has a groove, the sensing trigger is embedded in the groove, the lower end of the sensing trigger is inserted into the groove, the upper end of the sensing trigger is flush with the upper surface of the flange, and the grating disk is fixed on the upper surface of the flange.

[0006] Based on the first preferred embodiment of the present invention described above, the sensing trigger is further described as a cylindrical magnet with opposite magnetic poles at its upper and lower ends.

[0007] Based on the encoder disk assembly of the present invention described above, as a second preferred embodiment of the present invention: the support member has a flange for mounting the grating disk, a groove is provided on the side of the flange, the sensing trigger is embedded in the groove, the inner end of the sensing trigger is inserted into the groove, the outer end of the sensing trigger is flush with the side of the flange, and the grating disk is fixed on the upper surface of the flange.

[0008] Based on the second preferred embodiment of the present invention described above, the sensing trigger is further described as a cylindrical magnet with opposite magnetic poles at its inner and outer ends.

[0009] Based on the encoder disk assembly of the present invention described above, as a third preferred embodiment of the present invention: the sensing trigger is embedded in the grating disk, and the sensing trigger is made of permanent magnet material or material with specific inductance coefficient and dielectric constant.

[0010] To facilitate the installation of the encoder code disk assembly, based on the encoder code disk assembly of the present invention described above, the support member has a shaft connecting sleeve, and the mounting hole is located at the center of the shaft connecting sleeve.

[0011] Corresponding to the code disk assembly of the encoder of this utility model, this utility model also provides a grating electromagnetic combined encoder, including the code disk assembly of the encoder described in the above technical solution, and a stator assembly. The induction trigger is a magnet, and the zero position sensor is a magnetic sensor. When the code disk assembly rotates, the induction trigger causes the magnetic sensor to generate a magnetic field and output an electrical signal.

[0012] Corresponding to the code disk assembly of the encoder of this utility model, this utility model also provides a grating inductor combined encoder, including the code disk assembly of the encoder described in the above technical solution, and a stator assembly. The inductive trigger is made of a material with a specific inductance coefficient, and the zero-position sensor is an inductor sensor. The inductor sensor includes a transmitting coil and a receiving coil. When the code disk assembly rotates, the inductive trigger causes a change in the electromagnetic coupling effect between the transmitting coil and the receiving coil, thereby causing the receiving coil to output an electrical signal.

[0013] Corresponding to the code disk assembly of the encoder of this utility model, this utility model also provides a grating-capacitor combination encoder, including the code disk assembly of the encoder described in the above technical solution, and a stator assembly. The inductive trigger is made of a material with a specific dielectric constant, and the zero-position sensor is a capacitive sensor. The capacitive sensor includes an emitter and a receiver. The code disk of the code disk assembly is located between the emitter and the receiver. When the code disk assembly rotates, the inductive trigger causes a change in the capacitance between the emitter and the receiver, thereby causing the capacitive sensor to output an electrical signal.

[0014] As described above, the encoder code disk assembly of this utility model has the following beneficial effects: In the encoder code disk assembly of this utility model, by embedding a sensing trigger on the support / grating disk of the code disk assembly, the sensing trigger can trigger the zero-position sensor on the encoder stator assembly to generate a zero-position signal, thereby enabling the encoder to conveniently provide a zero-position signal output. Furthermore, there is a distance between the sensing trigger and the mounting hole of the code disk assembly, so that the sensing trigger and the code disk assembly can be assembled together without relying on the rotor's main shaft or the motor's main shaft. Therefore, the encoder code disk assembly of this utility model has strong versatility.

[0015] The present invention relates to a combined encoder of grating electromagnetic, grating inductor, and grating capacitor, which includes the code disk assembly of the encoder of the present invention and has the aforementioned beneficial effects, which will not be elaborated here. Attached Figure Description

[0016] Figure 1 The diagram shown illustrates a first embodiment of an encoder and its code disk assembly according to the present invention.

[0017] Figure 2 The diagram shown illustrates a second embodiment of an encoder and its code disk assembly according to the present invention.

[0018] Figure 3 and Figure 4 The diagram shown illustrates a third embodiment of an encoder and its code disk assembly according to the present invention.

[0019] Figure 5The diagram shown is a fourth embodiment of an encoder and its code disk assembly according to the present invention.

[0020] Component designation explanation

[0021] 1 Support components 2 flange 3 Shaft connecting sleeve 4 Mounting holes 5 raster disk 6 motor shaft 7 Induction trigger 8 stator assembly 9 Zero-position sensor 10-1 groove 10-2 groove 11 emitter 12 receiver 13 photoelectric sensor Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0023] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0024] like Figures 1 to 5 As shown, this utility model provides an encoder code disk assembly, including a support member 1 and a grating disk 5 coaxially fixed together. The support member 1 has a mounting hole 4 at its center for connecting a motor shaft 6. A sensing trigger 7 is also embedded on the support member 1 / grating disk 5. The sensing trigger 7 is used to trigger a zero-position sensor 9 on the encoder stator assembly 8 to generate a zero-position signal. There is a distance between the sensing trigger 7 and the mounting hole 4.

[0025] This invention discloses an encoder code disk assembly whose grating disk 5 is adapted to an encoder capable of outputting A-phase and B-phase signals. The encoder has two photoelectric sensors 13 (or a single photoelectric sensor capable of outputting A-phase and B-phase signals) and one grating disk 5. The two photoelectric sensors 13 output A-phase and B-phase signals respectively, with a 90-degree phase difference between them. The A-phase and B-phase signal outputs are completed by a single chip. The rotation of the grating disk 5 causes the two photoelectric sensors 13 to generate two-way A-phase and B-phase outputs. The signal generated by the trigger 7 triggering the zero-position sensor 9 is a Z-phase signal, which is output by another chip, eliminating the need for a high-cost chip supporting 3-channel output. Therefore, the encoder code disk assembly of this invention enables the encoder to generate three-phase signal outputs: A-phase, B-phase, and Z-phase.

[0026] In the code disk assembly of the encoder of this utility model, a sensing trigger 7 is embedded on the support member 1 / grating disk 5 of the code disk assembly. The sensing trigger 7 can trigger the zero-position sensor 9 on the encoder stator assembly 8 to generate a zero-position signal, thereby enabling the encoder to conveniently provide a zero-position signal output. Moreover, there is a distance between the sensing trigger 7 and the mounting hole 4 of the code disk assembly. In this way, the sensing trigger 7 and the code disk assembly can be assembled together without relying on the rotor's main shaft or the motor's main shaft. Therefore, the code disk assembly of the encoder of this utility model can adapt to situations where the motor shaft passes through or does not pass through the encoder, and has strong versatility.

[0027] Furthermore, in the encoder's code disk assembly of this invention, the sensing trigger 7 is not located on the motor's main shaft, but rather at a certain distance from the mounting hole 4 used to mount the motor's main shaft. This distance between the sensing trigger 7 and the mounting hole 4 amplifies the rotational movement amplitude of the sensing trigger 7. The greater the distance between the sensing trigger 7 and the mounting hole 4, the greater the movement amplitude of the sensing trigger 7 caused by the same rotation angle of the code disk. Even a small angular displacement of the code disk assembly can cause a large relative movement between the sensing trigger 7 and the zero-position sensor 9. This makes the signal change in the zero-position sensor 9 more obvious, and the encoder's monitoring of the zero position more sensitive and accurate.

[0028] This utility model provides an encoder code disk assembly that adds a Z-phase signal output to a photoelectric encoder with A-phase and B-phase output signals. This can be achieved by:

[0029] 1) Increase the output of the Z-phase signal in the magnetoelectric type. In this case, the induction trigger 7 can be designed as a magnet to trigger the electromagnetic sensor to generate a signal;

[0030] 2) Increase the output of the Z-phase signal by inductance. In this case, the inductive trigger 7 is a sheet or block made of a material with a specific dielectric constant, which can trigger the capacitive sensor to generate a signal.

[0031] The encoder code disk assembly of this utility model is very suitable for reflective grating encoders, with a compact structure and ingenious design.

[0032] First implementation method:

[0033] like Figure 1As shown, based on the encoder code disk assembly of this utility model, the support member 1 has a flange 2 for mounting the grating disk 5. The upper surface of the flange 2 has a groove 10-1, in which the sensing trigger 7 is embedded. The lower end of the sensing trigger 7 is inserted into the groove 10-1, and the upper end of the sensing trigger 7 is flush with the upper surface of the flange 2. The grating disk 5 is fixed to the upper surface of the flange 2. In this way, the sensing trigger 7 is embedded under the grating disk 5, which does not occupy additional space. The structure is simple and neat, which facilitates the structural layout design of the encoder. The grating disk 5 is a reflective grating disk. The sensing trigger 7 can be set under the code track of the grating disk without affecting the triggering of photoelectric signals during the rotation of the grating disk 5. This method does not increase the size of the grating disk 5, and the overall structure is relatively compact. Moreover, by embedding the sensing trigger 7 in the groove 10-1 of the flange 2, the sensing trigger 7 is not exposed, eliminating the risk of scratches or bumps. In addition, since the induction trigger 7 is embedded in the groove 10-1 of the flange, it does not affect the rotating body structure of the entire code disk assembly, resulting in high product appearance consistency, low moment of inertia, and good dynamic balance.

[0034] Figure 1 The induction trigger 7 is a cylindrical magnet with opposite magnetic poles at its upper and lower ends. At this time, the zero-position sensor 9 on the encoder stator assembly 8 is a magnetic sensor. When the code disk assembly rotates, the induction trigger 7 causes the magnetic sensor to generate a magnetic field and output an electrical signal. When the code disk rotates to a certain position, the magnetic sensor outputs an electrical signal indicating the zero position.

[0035] The stator assembly 8 of the encoder is also equipped with a photoelectric sensor 13 and a light source. Figure 1 The encoder in this invention is a reflective grating encoder, with two photoelectric sensors 13 integrated with the light source. The rotation of the grating disk 5 causes the photoelectric sensors 13 to generate two outputs, A-phase and B-phase, while the inductive trigger 7 triggers the zero-position sensor 9 to generate a Z-phase signal. Therefore, the code disk assembly of this invention enables the encoder to generate three-phase signal outputs: A-phase, B-phase, and Z-phase.

[0036] Second implementation method:

[0037] like Figure 2 As shown, based on the encoder disk assembly of the present invention, the support member 1 has a flange 2 for mounting the grating disk 5. The side of the flange 2 is provided with a groove 10-2. The sensing trigger 7 is embedded in the groove 10-2. The inner end of the sensing trigger 7 is inserted into the groove 10-2, and the outer end of the sensing trigger 7 is flush with the side of the flange 2. The grating disk 5 is fixed on the upper surface of the flange 2.

[0038] Figure 2The induction trigger 7 is a cylindrical magnet with opposite magnetic poles at its inner and outer ends. At this time, the zero-position sensor 9 on the encoder stator assembly 8 is a magnetic sensor. When the code disk assembly rotates, the induction trigger 7 causes the magnetic sensor to generate a magnetic field and output an electrical signal. When the code disk rotates to a certain position, the magnetic sensor outputs an electrical signal indicating the zero position.

[0039] The stator assembly 8 of the encoder is also equipped with a photoelectric sensor 13 and a light source. Figure 2 The encoder in this invention is a reflective grating encoder, with two photoelectric sensors 13 integrated with the light source. The rotation of the grating disk 5 causes the photoelectric sensors 13 to generate two outputs, A-phase and B-phase, while the inductive trigger 7 triggers the zero-position sensor 9 to generate a Z-phase signal. Therefore, the code disk assembly of this invention enables the encoder to generate three-phase signal outputs: A-phase, B-phase, and Z-phase.

[0040] The third implementation method:

[0041] like Figure 3 and Figure 4 As shown, based on the code disk assembly of the encoder of the present invention, the sensing trigger 7 is embedded in the grating disk 5, and the sensing trigger 7 is a magnet (see...). Figure 3 (as shown) or sheet or block parts made of a material with a specific inductance coefficient (see...) Figure 4 (As shown).

[0042] The stator assembly 8 of the encoder is also equipped with a photoelectric sensor 13 and a light source. Figure 3 and Figure 4 The encoder in this invention is a reflective grating encoder, with two photoelectric sensors 13 integrated with the light source. The rotation of the grating disk 5 causes the photoelectric sensors 13 to generate two outputs, A-phase and B-phase, while the inductive trigger 7 triggers the zero-position sensor 9 to generate a Z-phase signal. Therefore, the code disk assembly of this invention enables the encoder to generate three-phase signal outputs: A-phase, B-phase, and Z-phase.

[0043] Fourth implementation method:

[0044] like Figure 5 As shown, based on the code disk assembly of the encoder of the present invention, the sensing trigger 7 is embedded in the grating disk 5. The sensing trigger 7 is a sheet or block part made of a material with a specific dielectric constant. The zero-position sensor 9 is a capacitance sensor, which includes an emitter 11 and a receiver 12. The code disk of the code disk assembly is located between the emitter 11 and the receiver 12. When the code disk assembly rotates, the sensing trigger 7 causes the capacitance between the emitter 11 and the receiver 12 to change, thereby causing the capacitance sensor to output an electrical signal.

[0045] The stator assembly 8 of the encoder is also equipped with a photoelectric sensor 13 and a light source. Figure 3 and Figure 4 The encoder in this invention is a reflective grating encoder, with two photoelectric sensors 13 integrated with the light source. The rotation of the grating disk 5 causes the photoelectric sensors 13 to generate two outputs, A-phase and B-phase, while the inductive trigger 7 triggers the zero-position sensor 9 to generate a Z-phase signal. Therefore, the code disk assembly of this invention enables the encoder to generate three-phase signal outputs: A-phase, B-phase, and Z-phase.

[0046] To facilitate the installation of the encoder code disk assembly, based on the encoder code disk assembly of the present invention, the support member 1 has a shaft connecting sleeve 3, and the mounting hole 4 is located at the center of the shaft connecting sleeve 3.

[0047] Corresponding to the code disk assembly of the encoder of this utility model, this utility model also provides a grating electromagnetic combined encoder, please refer to... Figures 1 to 3 The encoder includes the code disk assembly of the encoder described in the above technical solution, and the stator assembly 8. The induction trigger 7 is a magnet, and the zero-position sensor 9 is a magnetic sensor. When the code disk assembly rotates, the induction trigger 7 causes the magnetic sensor to generate a magnetic field and output an electrical signal.

[0048] Corresponding to the code disk assembly of the encoder of this utility model, this utility model also provides a grating-inductor combined encoder, please refer to... Figure 4 The encoder includes the code disk assembly described in the above technical solution, and the stator assembly 8. The inductive trigger 7 is made of a material with a specific inductance coefficient. The zero-position sensor 9 is an inductive sensor, which includes a transmitting coil (not shown in the figure) and a receiving coil (not shown in the figure). When the code disk assembly rotates, the inductive trigger 7 causes a change in the electromagnetic coupling effect between the transmitting coil and the receiving coil, thereby causing the receiving coil to output an electrical signal.

[0049] The inductive trigger 7, made of a material with a specific inductance coefficient, has a different inductance coefficient than other parts of the code disk assembly. Therefore, during the rotation of the code disk assembly, the inductance sensor will generate an inductance change in the inductive trigger 7, thereby outputting a signal.

[0050] Corresponding to the code disk assembly of the encoder of this utility model, this utility model also provides a grating-capacitor combination encoder, please refer to... Figure 5The encoder includes the code disk assembly of the encoder described in the above technical solution, and the stator assembly 8. The induction trigger 7 is made of a material with a specific dielectric constant. The zero-position sensor 9 is a capacitive sensor, which includes an emitter 11 and a receiver 12. The code disk of the code disk assembly is located between the emitter 11 and the receiver 12. When the code disk assembly rotates, the induction trigger 7 causes a change in the capacitance between the emitter 11 and the receiver 12, thereby causing the capacitive sensor to output an electrical signal.

[0051] The inductive trigger 7, made of a material with a specific dielectric constant, has a different dielectric constant than other parts of the code disk assembly. Therefore, during the rotation of the code disk assembly, the inductive sensor will generate a capacitance change in the inductive trigger 7, thereby outputting a signal.

[0052] In this utility model, a combined encoder and code disk assembly using grating electromagnetic, grating inductive, and grating capacitive methods includes an inductive trigger 7 embedded in the support member 1 or the grating disk 5 of the code disk assembly. This inductive trigger 7 triggers the zero-position sensor 9 on the encoder stator assembly 8 to generate a zero-position signal, thereby enabling the encoder to provide a precise zero-position signal output and ensuring the accuracy and reliability of the encoder. Furthermore, because there is a certain distance between the inductive trigger 7 and the mounting hole 4 of the code disk assembly, the code disk assembly can be used with or without the motor shaft penetrating the encoder, offering strong versatility. Since the inductive trigger 7 is not directly mounted on the motor shaft but is positioned at a certain distance from the mounting hole 4, this design amplifies the rotational movement amplitude of the inductive trigger 7. Even with a small angular displacement of the code disk assembly, the relative movement amplitude between the inductive trigger 7 and the zero-position sensor 9 will be larger, resulting in a more noticeable signal change in the zero-position sensor 9 and improving the encoder's sensitivity and accuracy in detecting the zero position.

[0053] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A code disk assembly for an encoder, characterized in that, The device includes a support member and a grating disk that are coaxially fixed together. The support member has a mounting hole at its center for connecting the motor shaft. A sensing trigger is also embedded on the support member / grating disk. The sensing trigger is used to trigger a zero-position sensor on the encoder stator assembly to generate a zero-position signal. There is a distance between the sensing trigger and the mounting hole.

2. The code disk assembly of the encoder according to claim 1, characterized in that: The support has a flange for mounting a grating disk. The upper surface of the flange has a groove, in which the sensing trigger is embedded. The lower end of the sensing trigger is inserted into the groove, and the upper end of the sensing trigger is flush with the upper surface of the flange. The grating disk is fixed to the upper surface of the flange.

3. The code disk assembly of the encoder according to claim 2, characterized in that: The sensing trigger is a cylindrical magnet with opposite magnetic poles at its upper and lower ends.

4. The code disk assembly of the encoder according to claim 2, characterized in that: The sensing trigger is embedded in the grating disk and is made of permanent magnet material or material with a specific inductance coefficient and a specific dielectric constant.

5. The code disk assembly of the encoder according to claim 1, characterized in that: The support has a shaft connecting sleeve, and the mounting hole is located at the center of the shaft connecting sleeve.

6. A grating electromagnetic combination encoder, characterized in that: The encoder includes a code disk assembly as described in claim 1 and a stator assembly, wherein the induction trigger is a magnet and the zero-position sensor is a magnetic sensor. When the code disk assembly rotates, the induction trigger causes the magnetic sensor to generate a magnetic field and output an electrical signal.

7. A grating-inductor combined encoder, characterized in that: The encoder includes a code disk assembly and a stator assembly as described in claim 1, wherein the inductive trigger is made of a material with a specific inductance coefficient, the zero-position sensor is an inductive sensor, and the inductive sensor includes a transmitting coil and a receiving coil. When the code disk assembly rotates, the inductive trigger causes a change in the electromagnetic coupling effect between the transmitting coil and the receiving coil, thereby causing the receiving coil to output an electrical signal.

8. A grating-capacitor combination encoder, characterized in that: The encoder includes a code disk assembly as described in claim 1, and a stator assembly. The inductive trigger is made of a material with a specific dielectric constant. The zero-position sensor is a capacitive sensor, which includes an emitter and a receiver. The code disk of the code disk assembly is located between the emitter and the receiver. When the code disk assembly rotates, the inductive trigger causes a change in the capacitance between the emitter and the receiver, thereby causing the capacitive sensor to output an electrical signal.

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