WO2022021382A1 - Motor encoder, motor and method for installing motor encoder - Google Patents
Motor encoder, motor and method for installing motor encoder Download PDFInfo
- Publication number
- WO2022021382A1 WO2022021382A1 PCT/CN2020/106346 CN2020106346W WO2022021382A1 WO 2022021382 A1 WO2022021382 A1 WO 2022021382A1 CN 2020106346 W CN2020106346 W CN 2020106346W WO 2022021382 A1 WO2022021382 A1 WO 2022021382A1
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- WO
- WIPO (PCT)
- Prior art keywords
- motor
- mounting
- rear end
- end cover
- static disc
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
Definitions
- the present disclosure relates to electrical technologies, and more particularly, to a motor encoder, motor and method for installing the motor encoder.
- the encoder with bearing is a whole product and can be directly installed to a motor without any adjustment operation.
- the bearingless encoder usually has two separated assemblies: a rotor assembly 1 and a stator assembly 2 as shown in figure 1.
- the rotor assembly 1 includes a rotary disc 11 and a hub 12, the rotary disc 11 is fixed on the hub 12, and the hub 12 is adapted to be installed on a motor shaft (not shown) of the motor body 3 as shown in figure 2A.
- the rotor assembly 1 can rotate with the motor shaft and send position information of the motor shaft via a physical signal.
- the stator assembly 2 includes a static disc 21 and a holder 22, the static disc 21 is fixed on the holder 22 and the holder 22 is adapted to be installed on the motor body 3 as shown in figure 2B, and the static disc21 is adapted to detect the physical signal sent by the rotor assembly 1, and convert the physical signal into a digital signal.
- the holder 22 Because the holder 22 will take up a lot of installation space, the installation of the bearingless encoder depends on the main body of the rear end of the motor so that installation space is limited, and it is difficult for the rotor 1 to be fixed. In addition, the holder 22 has a fixed cost.
- a motor encoder, motor and method for installing the motor encoder is provided to resolve the problem that the installation space is limited due to the holder takes up a lot of installation space.
- the motor encoder provided by examples of the present disclosure includes: a rotor assembly; and a static disc, which has at least two mounting holes for fixing the static disc on a rear end cover of a motor; wherein the rear end cover possesses an cavity for accommodating the static disc, and in the cavity there is a mounting structure which has at least two threaded holes corresponding to the at least two mounting holes.
- the mounting structure comprises: at least two mounting columns, and each mounting column possesses a threaded hole; or at least two mounting platforms, and each mounting platform possesses a threaded hole; or one mounting platform which possesses at least two threaded holes.
- the motor provided by examples of the present disclosure includes: a motor body; and a rear end cover, which has an cavity for accommodating a static disc of a motor encoder, and in the cavity there is a mounting structure which has at least two threaded holes corresponding to at least two mounting holes in the static disc, through the at least two mounting holes and the at least two threaded holes, the static disc is fixed in the rear end cover by at least two screws.
- the mounting structure comprises: at least two mounting columns, and each mounting column possesses a threaded hole; or at least two mounting platforms, and each mounting platform possesses a threaded hole; or one mounting platform which possesses at least two threaded holes.
- the method for installing the motor encoder according to any one example to a motor according to any one example includes: installing the rotor assembly of the motor encoder on a shaft of the motor body of the motor; installing the static disc in the rear end cover of the motor; and installing the rear end cover on the motor body.
- the installation space is saved, and the cost is reduced.
- Figure 1 is a schematic diagram illustrating a conventional bearingless encoder.
- Figures 2A and 2B are schematic diagrams illustrating an assembly relationship between the conventional bearingless encoder and a motor.
- Figure 3 is a schematic diagram illustrating a bearingless motor encoder according to an example of the present disclosure.
- Figures 4A and 4B are schematic diagrams illustrating a rear end cover of a motor according to an example of the present disclosure.
- Figure 4B is a sectional view of Figure 4A.
- Figures 5A to 5C are schematic diagrams illustrating an assembly relationship between the bearingless motor encoder of the present disclosure and a motor according to examples of the present disclosure.
- Figure 3 is a schematic diagram illustrating a bearingless motor encoder according to examples of the present disclosure.
- the holder of conventional bearingless encoder is removed and then the static disc may be directly installed in the rear end cover of the motor.
- the motor encoder includes: a rotor assembly 1 and a static disc 23.
- the rotor assembly 1 may be the same as that shown in figure 1.
- the static disc 23 may be the same as that shown in figure 1 and has the same mounting holes 231 as that shown in figure 1. In another example, mounting holes of the static disc 23 may be different from that shown in figure 1. No matter what kind of mounting holes, the mounting holes are adapted to fix the static disc 23 on a rear end cover of a motor.
- the motor includes a motor body 3 and a rear end cover.
- the motor body 3 may be the same as a conventional one.
- Figures 4A and 4B are schematic diagrams illustrating a rear end cover of a motor according to an example of the present disclosure.
- Figure 4B is a sectional view of Figure 4A.
- the rear end cover 4 has an cavity 41 for accommodating the static disc 23 of the bearingless motor encoder, and in the cavity 41 there is a mounting structure which has at least two threaded holes 42 corresponding to at least two mounting holes 231 in the static disc 23, through the at least two mounting holes 231 and the at least two threaded holes 42, the static disc 23 may be fixed on the rear end cover 4 by at least two screws 5 as shown in figures 5B.
- the mounting structure may include at least two mounting columns 43, and each mounting column 43 possesses a threaded hole 42.
- the mounting columns 43 may be separated from the side wall of the rear end cover, or be integrated with the side wall of the rear end cover 4 as shown in figure 4A and 4B.
- the mounting structure may include at least two mounting platforms (not shown) , and each mounting platform possesses a threaded hole.
- the mounting platforms may be bosses extending from the side wall of the rear end cover.
- the mounting structure may be one mounting platform which possesses at least two threaded holes, the one mounting platform forms a step in the cavity 41.
- the rear end cover 4 further includes a mounting end 44 for fixing the rear end cover 4 to the motor body 3. There are four mounting holes 441 in the mounting end 44.
- the rear end cover 4 may further have a cable through hole 45 in the side wall of the rear end cover 4.
- the cavity 41 in the rear end cover 4 is a cylindrical cavity similar to the shape of the static disk 23, and the lateral contour of the rear end cover 4 is consistent with that of the motor body 3.
- Figures 5A to 5C are schematic diagrams illustrating an assembly relationship between the bearingless motor encoder of the present disclosure and a motor according to examples of the present disclosure.
- the installation process may include: installing the rotor assembly 1 of the motor encoder on the motor shaft of the motor body 3 of the motor as shown in figure 5A (the same as figure 2A) , and installing the static disc 23 in the rear end cover 4 of the motor as shown in figure 5B; and then installing the rear end cover 4 on the motor body 3 as shown in figure 5C.
- the installation space is saved, and the cost is reduced.
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Abstract
A motor encoder, a motor and a method for installing the motor encoder are provided. The motor encoder includes a rotor assembly (1); and a static disc (23), which has at least two mounting holes (231) for fixing the static disc (23) on a rear end cover (4) of a motor; wherein the rear end cover (4) possesses an cavity (41) for accommodating the static disc (23), and in the cavity (41) there is a mounting structure which has at least two threaded holes (42) corresponding to the at least two mounting holes (231).
Description
The present disclosure relates to electrical technologies, and more particularly, to a motor encoder, motor and method for installing the motor encoder.
Currently there are mainly two structural styles servo motor encoders in the market: with bearing and bearingless type.
The encoder with bearing is a whole product and can be directly installed to a motor without any adjustment operation. The bearingless encoder usually has two separated assemblies: a rotor assembly 1 and a stator assembly 2 as shown in figure 1. The rotor assembly 1 includes a rotary disc 11 and a hub 12, the rotary disc 11 is fixed on the hub 12, and the hub 12 is adapted to be installed on a motor shaft (not shown) of the motor body 3 as shown in figure 2A. The rotor assembly 1 can rotate with the motor shaft and send position information of the motor shaft via a physical signal. The stator assembly 2 includes a static disc 21 and a holder 22, the static disc 21 is fixed on the holder 22 and the holder 22 is adapted to be installed on the motor body 3 as shown in figure 2B, and the static disc21 is adapted to detect the physical signal sent by the rotor assembly 1, and convert the physical signal into a digital signal.
Because the holder 22 will take up a lot of installation space, the installation of the bearingless encoder depends on the main body of the rear end of the motor so that installation space is limited, and it is difficult for the rotor 1 to be fixed. In addition, the holder 22 has a fixed cost.
SUMMARY
According to examples of the present disclosure, a motor encoder, motor and method for installing the motor encoder is provided to resolve the problem that the installation space is limited due to the holder takes up a lot of installation space.
The motor encoder provided by examples of the present disclosure includes: a rotor assembly; and a static disc, which has at least two mounting holes for fixing the static disc on a rear end cover of a motor; wherein the rear end cover possesses an cavity for accommodating the static disc, and in the cavity there is a mounting structure which has at least two threaded holes corresponding to the at least two mounting holes.
In an example, the mounting structure comprises: at least two mounting columns, and each mounting column possesses a threaded hole; or at least two mounting platforms, and each mounting platform possesses a threaded hole; or one mounting platform which possesses at least two threaded holes.
In an example, there is a cable through hole in a side wall of the rear end cover.
The motor provided by examples of the present disclosure includes: a motor body; and a rear end cover, which has an cavity for accommodating a static disc of a motor encoder, and in the cavity there is a mounting structure which has at least two threaded holes corresponding to at least two mounting holes in the static disc, through the at least two mounting holes and the at least two threaded holes, the static disc is fixed in the rear end cover by at least two screws.
In an example, the mounting structure comprises: at least two mounting columns, and each mounting column possesses a threaded hole; or at least two mounting platforms, and each mounting platform possesses a threaded hole; or one mounting platform which possesses at least two threaded holes.
In an example, there is a cable through hole in a side wall of the rear end cover.
The method for installing the motor encoder according to any one example to a motor according to any one example, includes: installing the rotor assembly of the motor encoder on a shaft of the motor body of the motor; installing the static disc in the rear end cover of the motor; and installing the rear end cover on the motor body.
In the present disclosure, because the holder of the conventional motor encoder is removed, and the static disc is directly installed on a motor rear end cover which is reformed to be adapted to fix the static disc, the installation space is saved, and the cost is reduced. In addition, it is easier to install the static disc to the rear end cover, so the location between the rotary disc and the static disc is also simple. By removing the holder, the assembly steps in motor encoder production line is simplified, thus working time per product is saved and production efficiency is increased.
For a better understanding of the present disclosure, reference should be made to the Detailed Description below, in conjunction with the following drawings in which like reference numerals refer to corresponding parts throughout the figures.
Figure 1 is a schematic diagram illustrating a conventional bearingless encoder.
Figures 2A and 2B are schematic diagrams illustrating an assembly relationship between the conventional bearingless encoder and a motor.
Figure 3 is a schematic diagram illustrating a bearingless motor encoder according to an example of the present disclosure.
Figures 4A and 4B are schematic diagrams illustrating a rear end cover of a motor according to an example of the present disclosure. Figure 4B is a sectional view of Figure 4A.
Figures 5A to 5C are schematic diagrams illustrating an assembly relationship between the bearingless motor encoder of the present disclosure and a motor according to examples of the present disclosure.
The reference numerals are as follows:
| | Object | |
| 1 | |
|
| 11 | |
|
| 12 | |
|
| 2 | |
|
| 21, 23 | |
|
| 231 | mounting holes |
| 22 | |
| 3 | |
| 4 | |
| 41 | |
| 42 | threaded |
| 43 | |
| 44 | mounting |
| 441 | |
| 45 | cable through |
| 5 | screws |
In the present disclosure, in order to save the installation space, consider breaking the traditional design is broken, and locating the static disc by a cover of the motor instead of relying on the motor body in the past, to control the air gap between the static disc and rotary disc.
Reference will now be made in detail to examples, which are illustrated in the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. Also, the figures are illustrations of an example, in which modules or procedures shown in the figures are not necessarily essential for implementing the present disclosure. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the examples.
Figure 3 is a schematic diagram illustrating a bearingless motor encoder according to examples of the present disclosure. In these examples, the holder of conventional bearingless encoder is removed and then the static disc may be directly installed in the rear end cover of the motor. As shown in figure 3, the motor encoder includes: a rotor assembly 1 and a static disc 23.
The rotor assembly 1 may be the same as that shown in figure 1.
In an example, the static disc 23 may be the same as that shown in figure 1 and has the same mounting holes 231 as that shown in figure 1. In another example, mounting holes of the static disc 23 may be different from that shown in figure 1. No matter what kind of mounting holes, the mounting holes are adapted to fix the static disc 23 on a rear end cover of a motor.
In examples of the present disclosure, the motor includes a motor body 3 and a rear end cover. The motor body 3 may be the same as a conventional one. Figures 4A and 4B are schematic diagrams illustrating a rear end cover of a motor according to an example of the present disclosure. Figure 4B is a sectional view of Figure 4A.
As shown in figures 4A and 4B, the rear end cover 4 has an cavity 41 for accommodating the static disc 23 of the bearingless motor encoder, and in the cavity 41 there is a mounting structure which has at least two threaded holes 42 corresponding to at least two mounting holes 231 in the static disc 23, through the at least two mounting holes 231 and the at least two threaded holes 42, the static disc 23 may be fixed on the rear end cover 4 by at least two screws 5 as shown in figures 5B.
In an example, the mounting structure may include at least two mounting columns 43, and each mounting column 43 possesses a threaded hole 42. The mounting columns 43 may be separated from the side wall of the rear end cover, or be integrated with the side wall of the rear end cover 4 as shown in figure 4A and 4B. In figures 4A and 4B, there are three mounting columns 43 which are integrated with the side wall of the rear end cover 4. The number and the positions of the three mounting columns 43 is designed to be compatible with the static disk shown in figure 1 and avoid the modification to the static disk.
In another example, the mounting structure may include at least two mounting platforms (not shown) , and each mounting platform possesses a threaded hole. The mounting platforms may be bosses extending from the side wall of the rear end cover. In yet another example, the mounting structure may be one mounting platform which possesses at least two threaded holes, the one mounting platform forms a step in the cavity 41.
In addition, the rear end cover 4 further includes a mounting end 44 for fixing the rear end cover 4 to the motor body 3. There are four mounting holes 441 in the mounting end 44.
In examples of the present disclosure, in order to make the cable of the static disk 23 extend out of the rear end cover 4, the rear end cover 4 may further have a cable through hole 45 in the side wall of the rear end cover 4.
In an example, the cavity 41 in the rear end cover 4 is a cylindrical cavity similar to the shape of the static disk 23, and the lateral contour of the rear end cover 4 is consistent with that of the motor body 3.
Figures 5A to 5C are schematic diagrams illustrating an assembly relationship between the bearingless motor encoder of the present disclosure and a motor according to examples of the present disclosure.
As shown in figures 5A to 5C, the installation process may include: installing the rotor assembly 1 of the motor encoder on the motor shaft of the motor body 3 of the motor as shown in figure 5A (the same as figure 2A) , and installing the static disc 23 in the rear end cover 4 of the motor as shown in figure 5B; and then installing the rear end cover 4 on the motor body 3 as shown in figure 5C.
In the present disclosure, because the holder of the conventional motor encoder is removed, and the static disc is directly installed on a motor rear end cover which is reformed to be adapted to fix the static disc, the installation space is saved, and the cost is reduced. In addition, it is easier to install the static disc to the rear end cover, so the location between the rotary disc and the static disc is also simple. By removing the holder, the assembly steps in motor encoder production line is simplified, thus working time per product is saved and production efficiency is increased.
The foregoing description, for purpose of explanation, has been described with reference to specific examples. However, the illustrative discussions above are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings. The examples were chosen and described in order to best explain the principles of the present disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the present disclosure and various examples with various modifications as are suited to the particular use contemplated.
Claims (7)
- A motor encoder, characterized in that, comprises:a rotor assembly; anda static disc, which has at least two mounting holes for fixing the static disc on a rear end cover of a motor; wherein the rear end cover possesses an cavity for accommodating the static disc, and in the cavity there is a mounting structure which has at least two threaded holes corresponding to the at least two mounting holes.
- The motor encoder according to claim 1, characterized in that, the mounting structure comprises:at least two mounting columns, and each mounting column possesses a threaded hole; orat least two mounting platforms, and each mounting platform possesses a threaded hole; orone mounting platform which possesses at least two threaded holes.
- The motor encoder according to claim 1, characterized in that, there is a cable through hole in a side wall of the rear end cover.
- A motor, characterized in that, comprises:a motor body; anda rear end cover, which has an cavity for accommodating a static disc of a motor encoder, and in the cavity there is a mounting structure which has at least two threaded holes corresponding to at least two mounting holes in the static disc, through the at least two mounting holes and the at least two threaded holes, the static disc is fixed in the rear end cover by at least two screws.
- The motor according to claim 4, characterized in that, the mounting structure comprises:at least two mounting columns, and each mounting column possesses a threaded hole; orat least two mounting platforms, and each mounting platform possesses a threaded hole; orone mounting platform which possesses at least two threaded holes.
- The motor according to claim 4, characterized in that, there is a cable through hole in a side wall of the rear end cover.
- A method for installing the motor encoder according to any one of claims 1 to 3 to a motor according to any one of claims 4 to 6, characterized in that, comprises:installing the rotor assembly of the motor encoder on a shaft of the motor body of the motor;installing the static disc in the rear end cover of the motor; andinstalling the rear end cover on the motor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/106346 WO2022021382A1 (en) | 2020-07-31 | 2020-07-31 | Motor encoder, motor and method for installing motor encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/106346 WO2022021382A1 (en) | 2020-07-31 | 2020-07-31 | Motor encoder, motor and method for installing motor encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022021382A1 true WO2022021382A1 (en) | 2022-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2020/106346 WO2022021382A1 (en) | 2020-07-31 | 2020-07-31 | Motor encoder, motor and method for installing motor encoder |
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| Country | Link |
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| WO (1) | WO2022021382A1 (en) |
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| CN204408115U (en) * | 2015-02-13 | 2015-06-17 | 上海鲍麦克斯电子科技有限公司 | A kind of coder structure of work seam motor |
| CN104836385A (en) * | 2015-05-27 | 2015-08-12 | 巢惠英 | Novel alternating current servo motor for machine tool |
| CN108964327A (en) * | 2018-09-07 | 2018-12-07 | 中山市胜洋电机有限公司 | A kind of waterproof stepper motor with magnetic coder |
| CN110492690A (en) * | 2019-10-09 | 2019-11-22 | 浙江众邦机电科技有限公司 | A kind of motor magnetism encoder |
| WO2019246575A1 (en) * | 2018-06-21 | 2019-12-26 | Arcus Technology, Inc. | Motor with internal encoder unit |
| CN210833587U (en) * | 2019-11-29 | 2020-06-23 | 日本电产三协株式会社 | Encoder and motor |
| CN210839225U (en) * | 2019-08-22 | 2020-06-23 | 广州视源电子科技股份有限公司 | Motor and joint structure of robot |
-
2020
- 2020-07-31 WO PCT/CN2020/106346 patent/WO2022021382A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204408115U (en) * | 2015-02-13 | 2015-06-17 | 上海鲍麦克斯电子科技有限公司 | A kind of coder structure of work seam motor |
| CN104836385A (en) * | 2015-05-27 | 2015-08-12 | 巢惠英 | Novel alternating current servo motor for machine tool |
| WO2019246575A1 (en) * | 2018-06-21 | 2019-12-26 | Arcus Technology, Inc. | Motor with internal encoder unit |
| CN108964327A (en) * | 2018-09-07 | 2018-12-07 | 中山市胜洋电机有限公司 | A kind of waterproof stepper motor with magnetic coder |
| CN210839225U (en) * | 2019-08-22 | 2020-06-23 | 广州视源电子科技股份有限公司 | Motor and joint structure of robot |
| CN110492690A (en) * | 2019-10-09 | 2019-11-22 | 浙江众邦机电科技有限公司 | A kind of motor magnetism encoder |
| CN210833587U (en) * | 2019-11-29 | 2020-06-23 | 日本电产三协株式会社 | Encoder and motor |
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