Motor, encoder and servo system

Abstract

The utility model provides a motor, encoder and servo system, including the stator and with the rotor output shaft of stator cooperation, rotor output shaft circumferential surrounding is provided with annular revolving plate support portion, rotor output shaft and revolving plate support portion are integrated, and the rotor output shaft and the revolving plate support portion are connected with the rotor output shaft. An annular assembling face used for being assembled with a rotary plate is arranged on the side, away from the stator, of the rotary plate supporting part. The motor is simple in structure and convenient to install, the number of assembly steps is small when the motor is assembled with the rotary plate, and the installation precision is further improved.

Description

Technical Field

[0001] This utility model relates to the technical field of encoders, and in particular to a motor, encoder and servo system. Background Technology

[0002] Please see Figure 3 In existing encoder assemblies, the components typically include a rotary plate 3, a bushing 4, adhesive, a locking element 5, and a motor shaft 6. The rotary plate 3 needs to be glued and fixed to the bushing 4, and then the bushing 4 is fitted onto the motor shaft 6. The side wall of the bushing 4 has a through locking hole, and the locking element 5 is inserted into the locking hole to lock the bushing 4 onto the motor shaft 6. Due to the numerous installation steps, installation errors gradually accumulate and increase, installation accuracy decreases, and installation is inconvenient. Utility Model Content

[0003] This application provides a motor that solves the technical problem of low encoder installation accuracy in the prior art.

[0004] To achieve the above objectives, this application provides an electric motor, including a stator and a rotor output shaft that cooperates with the stator. The rotor output shaft is circumferentially surrounded by an annular rotary plate support portion. The rotor output shaft and the rotary plate support portion are integrally formed. The rotary plate support portion has an annular mounting surface for assembling with a rotary plate on the side away from the stator.

[0005] Compared with the existing technology, the motor structure of this utility model is simple and easy to install. When assembling with the rotary plate, there are fewer assembly steps, which further improves the installation accuracy.

[0006] In one embodiment, the end of the rotor output shaft protrudes from the annular mounting surface, forming a pin for engaging with the insertion hole of the encoder's rotary plate. This facilitates precise mounting of the encoder's rotary plate onto the output shaft, improving installation convenience.

[0007] In one embodiment, the end of the rotor output shaft is flush with the annular mounting surface. Shortening the length of the rotor output shaft makes the motor structure more compact.

[0008] In one embodiment, the rotary plate support is an integral annular structure circumferentially surrounding the rotor output shaft. The side of the integral annular structure away from the stator forms an annular mounting surface for assembling with the rotary plate of the encoder, thereby improving the rigidity and stability of the rotary plate support. Alternatively, the rotary plate support includes a plurality of support plates circumferentially surrounding the rotor output shaft. The side of the plurality of support plates away from the stator forms an annular mounting surface for assembling with the rotary plate of the encoder. The gaps between the support plates form heat dissipation channels, reducing the operating temperature of the motor and extending its service life.

[0009] In one embodiment, this application also provides an encoder, including a rotary plate and the aforementioned motor, wherein the rotary plate is fitted and fixed to the annular mounting surface of the rotary plate support.

[0010] In one embodiment, the rotary plate is annular with a central insertion hole. The end of the rotor output shaft protrudes from the annular mounting surface, forming a post. The insertion hole and the post are inserted into each other, and the rotary plate is fitted and fixed to the annular mounting surface. The insertion and engagement of the insertion hole ensures the alignment accuracy between the rotary plate and the rotor output shaft, improving the accuracy of the motor.

[0011] In one embodiment, the rotary plate is bonded and fixed to the annular mounting surface by an adhesive. Using adhesive bonding reduces the weight of the motor, making it lighter.

[0012] In one embodiment, the inner diameter of the insertion hole is greater than or equal to the outer diameter of the insertion post. This ensures that the rotary plate can be easily inserted into the rotor output shaft and maintains high-precision alignment, thereby improving the accuracy of the motor.

[0013] In one embodiment, the rotor output shaft, the rotary plate support, and the rotary plate are coaxially arranged. This ensures consistency in rotation among the three components, further improving the motor's accuracy.

[0014] In one embodiment, this application also provides a servo system including the encoder mentioned above.

[0015] To better understand and implement this application, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly of the motor and the rotary plate in one embodiment of this application;

[0017] Figure 2 This is an exploded structural diagram of the motor and rotary plate assembly in one embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the rotating plate installation structure in the background art of this application.

[0019] 1-Rotor output shaft, 2-Rotating plate support, 3-Rotating plate, 4-Shaft sleeve, 5-Locking part, 6-Motor shaft, 11-Pin post, 21-Annular assembly surface, 31-Pin hole. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0021] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application.

[0022] It should also be noted that in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Please refer to the following: Figure 1 This embodiment provides a motor including a stator and a rotor output shaft 1 that mates with the stator. An annular rotary plate support portion 2 is circumferentially arranged around the rotor output shaft 1. The rotor output shaft 1 and the rotary plate support portion 2 are integrally formed. The rotary plate support portion 2 has an annular mounting surface 21 on its side away from the stator for assembly with a rotary plate 3. The integrally formed rotor output shaft 1 and rotary plate support portion 2 eliminate the assembly steps between the bushing and the rotor output shaft in the prior art, improving installation accuracy and facilitating installation.

[0024] The rotor output shaft 1 is cylindrical, which results in a relatively uniform distribution of shear stress across the circular cross-section. This improves the load-bearing capacity of the rotor output shaft 1, as well as the stability and accuracy of rotation. In another embodiment, the rotor output shaft 1 can also be configured as an elliptical, square, or other shape depending on the actual application scenario.

[0025] In this embodiment, the end of the rotor output shaft 1 protrudes from the annular mounting surface 21, forming a pin 11 for engaging with the insertion hole 31 of the encoder's rotary plate 3. The engagement of the pin 11 with the insertion hole 31 of the encoder's rotary plate 3 not only facilitates the precise installation of the encoder's rotary plate 3 onto the output shaft but also effectively reduces the possibility of the encoder's rotary plate 3 loosening or falling off during operation. Specifically, the outer diameter of the pin 11 is larger than the outer diameter of the rotor output shaft 1, resulting in a larger contact area between the pin 11 and the insertion hole 31 of the rotary plate 3, improving connection stability, and allowing it to withstand greater axial and radial loads. In another embodiment, the outer diameter of the pin 11 can be equal to that of the rotor output shaft 1 for easier machining; alternatively, the outer diameter of the pin 11 can be smaller than that of the rotor output shaft 1 to reduce material usage and achieve weight reduction. The chamfered edge at the end of the insertion post 11 not only serves as a guide to facilitate the insertion of the rotating plate 3 into the insertion post, but also prevents personnel from being injured by the sharp edge of the insertion post 11 during installation.

[0026] In another embodiment, the end of the rotor output shaft 1 is flush with the annular mounting surface 21, which can shorten the length of the rotor output shaft 1 and maximize the use of space in a limited space, so that the motor can be adapted to various compact products.

[0027] In this embodiment, the rotary plate support 2 is an integral annular structure circumferentially surrounding the rotor output shaft 1. The side of the integral annular structure away from the stator forms an annular mounting surface 21 for assembly with the encoder's rotary plate 3. This integral annular structure design significantly improves the rigidity and stability of the rotary plate support 2, thus better resisting external forces and vibrations, ensuring the smoothness and accuracy of the encoder's rotary plate 3 during rotation. Furthermore, the annular mounting surface 21 formed by the integral annular rotary plate support 2 has a large area, resulting in a more stable connection between the encoder's rotary plate 3 and the support after assembly.

[0028] In another embodiment, the rotary plate support 2 includes a plurality of support plates circumferentially surrounding the rotor output shaft 1. The side of each support plate away from the stator forms an annular mounting surface 21 for assembly with the rotary plate 3 of the encoder. A certain gap exists between the support plates, which provides additional heat dissipation channels, helping to reduce the motor's operating temperature, improve its performance in high-temperature environments, and extend the motor's service life. Furthermore, the reduced material used in manufacturing the support plates lowers the weight of the rotor output shaft 1, making the motor lighter.

[0029] This application also provides an encoder, including a rotary plate 3 and the aforementioned motor, wherein the rotary plate 3 is fitted and fixed to the annular mounting surface 21 of the rotary plate support 2. The outer diameter of the rotary plate support 2 is smaller than the outer diameter of the rotary plate 3 to prevent the rotary plate support 2 from interfering with the normal operation of the rotary plate 3 or other components.

[0030] Please refer to the following: Figure 2 The rotary plate 3 is annular, with a insertion hole 31 in its center. The end of the rotor output shaft 1 protrudes from the annular mounting surface 21, forming a post 11. The insertion hole 31 and the post 11 are inserted into each other, and the rotary plate 3 is fitted and fixed to the annular mounting surface 21. The insertion of the insertion hole 31 and the post 11 ensures the alignment accuracy between the rotary plate 3 and the rotor output shaft 1, reduces assembly errors, and improves the accuracy of the motor. Furthermore, the insertion method makes the installation of the rotary plate 3 simple and quick, improving assembly efficiency. Preferably, the rotary plate 3 is annular, so that the force is more evenly distributed during rotation, ensuring that the motor maintains high precision and stability during operation. In another embodiment, the outer contour of the rotary plate 3 can also be square, elliptical, or other shapes. The length of the post 11 is less than the thickness of the rotary plate 3 to prevent the post 11 from interfering with the assembly and operation of other encoder components.

[0031] The inner diameter of the insertion hole 31 is greater than or equal to the outer diameter of the insertion post 11, ensuring that the rotary plate 3 can be easily inserted into the rotor output shaft 1 and maintain high-precision alignment, thereby improving the accuracy of the motor.

[0032] The rotating plate 3 is bonded and fixed to the annular assembly surface 21 by an adhesive. Compared with traditional mechanical fastening methods (such as bolts, rivets, etc.), adhesive does not require additional fasteners and connectors, reducing installation errors and further improving installation accuracy; moreover, the adhesive connection can reduce the weight of the motor, making the motor lighter. In this embodiment, the adhesive is a liquid adhesive. In other embodiments, the adhesive may also be a solid adhesive or other types of glue.

[0033] The rotor output shaft 1, the rotary plate support 2, and the rotary plate 3 are coaxially arranged. This coaxial arrangement can disperse stress and reduce stress concentration caused by axial misalignment, thereby enhancing the strength and durability of the structure, ensuring the consistency of the three components during rotation, and further improving the accuracy of the motor.

[0034] The installation process of the rotary plate 3 in this application is as follows: first, apply adhesive to the annular assembly surface 21, then align the insertion hole 31 of the rotary plate 3 with the insertion post 11 and insert it, then attach the rotary plate 3 to the annular assembly surface 21 so that it is in full contact with the adhesive, and then wait for the adhesive to harden, and the rotary plate 3 can be fixed on the annular assembly surface 21.

[0035] This application also provides a servo system including the encoder mentioned above. Due to the use of the encoder, the assembly steps of the servo system are reduced, installation is more convenient, and installation accuracy is improved, further enhancing the working accuracy of the servo system.

[0036] The specific examples described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electric motor, characterized in that: It includes a stator and a rotor output shaft that mates with the stator. The rotor output shaft is circumferentially surrounded by an annular rotary plate support portion. The rotor output shaft and the rotary plate support portion are integrally formed. The rotary plate support portion has an annular mounting surface for assembling with the rotary plate on the side away from the stator.

2. The motor according to claim 1, characterized in that: The end of the rotor output shaft protrudes from the annular mounting surface, forming a plug for engaging with the insertion hole of the encoder's rotary plate.

3. The motor according to claim 1, characterized in that: The end of the rotor output shaft is flush with the annular mounting surface.

4. The motor according to any one of claims 1-3, characterized in that: The rotary plate support is an integral annular structure that surrounds the rotor output shaft in the circumferential direction. The side of the integral annular structure away from the stator forms an annular mounting surface for assembly with the rotary plate of the encoder. or, The rotary plate support includes a plurality of support plates arranged circumferentially around the rotor output shaft, and the side of the plurality of support plates away from the stator forms an annular mounting surface for assembly with the rotary plate of the encoder.

5. An encoder, characterized in that: It includes a rotary plate and a motor as described in claim 1, wherein the rotary plate is fitted and fixed to the annular mounting surface of the rotary plate support.

6. The encoder according to claim 5, characterized in that: The rotary plate is annular, with a insertion hole in its middle. The end of the rotor output shaft protrudes from the annular assembly surface to form a plug. The insertion hole and the plug are inserted and fitted together. The rotary plate is attached and fixed to the annular assembly surface.

7. The encoder according to any one of claims 5 to 6, characterized in that: The rotary plate is fixed to the annular assembly surface by adhesive.

8. The encoder according to any one of claims 5 to 6, characterized in that: The inner diameter of the insertion hole is greater than or equal to the outer diameter of the insertion post.

9. The encoder according to any one of claims 5 to 6, characterized in that: The rotor output shaft, the rotary plate support, and the rotary plate are coaxially arranged.

10. A servo system, characterized in that: Includes the encoder as described in any one of claims 5 to 9.

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