Servo motor

Abstract

The utility model relates to the technical field of motors, in particular to a servo motor, which comprises a shell, a stator assembly, a rotor assembly, an output rotating shaft and an encoder, the shell comprises a front end cover, a fixed shell, a rear end cover and a rear shell, a placement cavity is arranged in the fixed shell, the front end cover and the rear end cover are respectively arranged at two ends of the fixed shell, and the encoder is arranged in the placement cavity. The rear shell is arranged at one end of the rear end cover; the stator assembly is arranged in the placement cavity, and the two ends of the output rotating shaft penetrate through and are connected to the front end cover and the rear end cover. One end of the output rotating shaft is connected with an encoder, and the other end is provided with a driving connecting end; the rotor assembly is arranged on the output rotating shaft and is opposite to the stator assembly; according to the utility model, the technical effects of high performance, high precision and high stability are realized through the fine housing design, the optimized internal assembly layout and the efficient electromagnetic coupling mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, in particular to a kind of servo motor. BACKGROUND

[0002] Motor, as a kind of conversion of electric energy into mechanical energy (or vice versa, i.e. mechanical energy into electrical energy), plays a vital role in modern industry and daily life. From a professional point of view, motor mainly works based on electromagnetic induction principle, and its core components usually include stator, rotor and electromagnetic winding, etc. Servo motor, as a kind of high-performance motor, is a key component in modern automation control system. It can accurately convert the received electrical signal into mechanical action, achieving high-precision position, speed and torque control. From a technical point of view, servo motor adopts a closed-loop control system, usually consisting of motor body, encoder (or resolver) and servo driver. The encoder is responsible for monitoring the position and speed information of the motor in real time, and transmits these feedback signals to the servo driver. The servo driver then adjusts the motor in real time according to the preset control algorithm and received instruction signals, ensuring it runs according to the expected trajectory.

[0003] The existing servo motor structure is relatively complex, and due to the structural design, it affects the precision and stability of the servo motor transmission. Therefore, it is necessary to make new design for the structure of the existing servo motor. SUMMARY

[0004] To solve the above problems, the utility model realizes the servo motor with high performance, high precision and high stability through fine shell design, optimized internal component layout and efficient electromagnetic coupling mechanism.

[0005] The technical scheme adopted by the utility model is: a servo motor, comprising a shell, a stator assembly, a rotor assembly, an output shaft and an encoder, the shell comprises a front end cover, a fixed shell, a rear end cover and a rear shell, the fixed shell is provided with a mounting cavity, the front end cover and the rear end cover are respectively arranged at both ends of the fixed shell to close the mounting cavity, and the rear shell is arranged at one end of the rear end cover; the stator assembly is arranged in the mounting cavity, and the output shaft passes through and is connected to the front end cover and the rear end cover at both ends; one end of the output shaft is used for connecting the encoder, and the other end is provided with a driving connection end; the rotor assembly is arranged on the output shaft and opposite to the stator assembly.

[0006] Further improvement of the above scheme is that the front end cover is provided with a front end rotary connection part, the rear end cover is provided with a rear end rotary connection part, the front end rotary connection part is provided with a front end bearing, the rear end rotary connection part is provided with a rear end bearing, and the front end bearing and the rear end bearing are respectively used for connecting both ends of the output shaft.

[0007] Further improvement of the above scheme is that the front end rotating connecting part is provided with a front end mounting groove for mounting a front end bearing, and the rear end rotating connecting part is provided with a rear end mounting groove for mounting a rear end bearing.

[0008] Further improvement of the above scheme is that the outer periphery of the front end cover is provided with a front end assembly step, and the outer periphery of the rear end cover is provided with a rear end assembly step, which are respectively used for connecting and fixing the two ends of the shell.

[0009] Further improvement of the above scheme is that the accommodation cavity is provided with a fixing step, and the stator assembly is arranged on the fixing step.

[0010] Further improvement of the above scheme is that the stator assembly comprises a stator skeleton and a stator coil, the stator skeleton is arranged in the accommodation cavity, and the inner diameter of the stator skeleton is provided with a plurality of magnetic yokes, and the stator coil is arranged on the magnetic yokes.

[0011] Further improvement of the above scheme is that the magnetic yokes are provided with an insulating member for insulating and separating the stator coil from the magnetic yokes.

[0012] Further improvement of the above scheme is that the rotor assembly comprises a rotor support and a rotor magnetic steel arranged on the rotor support, and one side of the rotor magnetic steel is opposite to the stator assembly.

[0013] Further improvement of the above scheme is that the rotor support is provided with a plurality of embedding grooves, and the rotor magnetic steel is embedded in the embedding grooves.

[0014] Further improvement of the above scheme is that the embedding grooves are provided with a limiting member for limiting the rotor magnetic steel in the embedding grooves, and the embedding grooves are provided with two groups of units, and the two groups of embedding grooves of each unit are arranged in an eight-character symmetric mode.

[0015] The utility model has the advantages of:

[0016] Compared with the existing servo motor, the utility model discloses a shell including front end cover, fixed casing, rear end cover and rear casing, constructs a firm and sealed accommodation cavity.Not only effectively protected the inside stator assembly and rotor assembly from the influence of external environment, such as dust, humidity, etc., but also ensured the stability and durability of motor operation.The close cooperation of front end cover and rear end cover further improves the sealing performance of the motor, reduces the risk of internal leakage.Secondly, the stator assembly is placed in the accommodation cavity of the fixed casing, and forms a good electromagnetic coupling environment with the rotor assembly.Optimize the distribution of the magnetic field, improve the electromagnetic conversion efficiency, thereby enhancing the output power and response speed of the motor.At the same time, the two ends of the output shaft cleverly pass through the front end cover and the rear end cover, and realize stable connection with them, guarantee the continuity and reliability of power transmission.Furthermore, the design of the output shaft end connecting the encoder makes the motor can real-time feedback position and speed information, provides accurate data support for closed-loop control system.This helps to improve the control accuracy and dynamic response capability of the system, so that the servo motor is more widely and efficiently used in the field of automatic control.Finally, the relative arrangement of the rotor assembly and the stator assembly, and the reasonable layout of the rotor assembly on the output shaft, further improve the operating efficiency and stability of the motor.By optimizing the rotor structure, the moment of inertia is reduced, so that the motor can quickly respond to the control instruction, realize high-precision positioning and speed control.The utility model realizes the technical effect of high performance, high precision and high stability through the fine shell design, optimized internal component layout and efficient electromagnetic coupling mechanism, provides strong support for the field of industrial automation, robot technology and the like. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic view of the utility model servo motor;

[0018] Figure 2 It is Figure 1 It is an explosion schematic view of the utility model servo motor;

[0019] Figure 3 It is Figure 1 It is a front view schematic view of the utility model servo motor;

[0020] Figure 4 It is Figure 3 It is the sectional view of A-A in the utility model;

[0021] Figure 5 It is Figure 1 It is a side view schematic view of the utility model servo motor;

[0022] Figure 6 It is Figure 5 It is the sectional view of B-B in the utility model.

[0023] Explanation of reference signs: shell 1, front end cover 11, front end rotating connection part 111, front end bearing 112, front end assembly step 113, fixed shell 12, installation cavity 121, fixed step 122, rear end cover 13, rear end rotating connection part 131, rear end bearing 132, rear end assembly step 133, rear shell 14, stator assembly 2, stator frame 21, magnetic yoke 211, insulating part 212, stator coil 22, rotor assembly 3, rotor support 31, embedding groove 311, limiting part 312, rotor magnetic steel 32, output rotating shaft 4, driving connection end 41, encoder 5. DETAILED DESCRIPTION

[0024] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. In the drawings, preferred embodiments of the present application are shown. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present application to those skilled in the art.

[0025] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present.

[0026] 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 the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. Thus, for example, reference to "a component" includes a combination of two or more components, and the like. Figures 1-6As shown, in an embodiment of the utility model, relate to a kind of servo motor, including shell 1, stator assembly 2, rotor assembly 3, output shaft 4 and encoder 5, the shell 1 includes front end cover 11, fixed shell 12, rear end cover 13 and rear shell 14, the fixed shell 12 is provided with installation cavity 121, the front end cover 11 and rear end cover 13 are respectively arranged at the both ends of fixed shell 12, to close installation cavity 121, the rear shell 14 is arranged at one end of rear end cover 13;The stator assembly 2 is arranged in installation cavity 121, the both ends of the output shaft 4 pass through and connect to front end cover 11 and rear end cover 13;The one end of the output shaft 4 is used to connect encoder 5, and the other end is provided with drive connection end 41;The rotor assembly 3 is arranged on output shaft 4, and is opposite to stator assembly 2.This embodiment by shell 1 includes front end cover 11, fixed shell 12, rear end cover 13 and rear shell 14, constructs a firm and sealed installation cavity 121.Not only effectively protects the inside stator assembly 2 and rotor assembly 3 from the influence of external environment, such as dust, humidity etc., also ensures the stability and durability of motor operation.The close cooperation of front end cover 11 and rear end cover 13 further improves the sealing performance of motor, reduces the risk of internal leakage.Secondly, the stator assembly 2 is arranged in the installation cavity 121 of fixed shell 12, and forms good electromagnetic coupling environment with rotor assembly 3.Optimizes the distribution of magnetic field, improves electromagnetic conversion efficiency, to enhance the output power and response speed of motor.At the same time, the both ends of output shaft 4 pass through front end cover 11 and rear end cover 13 skillfully, and realize stable connection with it, guarantee the continuity and reliability of power transmission.Furthermore, the design that one end of output shaft 4 connects encoder 5 makes motor can real-time feedback position and speed information, provides accurate data support for closed-loop control system.This helps to improve the control accuracy and dynamic response capability of system, so that servo motor is more widely and efficiently applied in the field of automation control.Finally, the relative arrangement of rotor assembly 3 and stator assembly 2, and the reasonable layout of rotor assembly 3 on output shaft 4, further improve the operating efficiency and stability of motor.Through optimizing rotor structure, reduce the moment of inertia, so that motor can quickly respond to control instruction, realize high-precision positioning and speed control.This embodiment realizes the technical effects of high performance, high precision and high stability through fine shell 1 design, optimized internal component layout and efficient electromagnetic coupling mechanism, provides strong support for industrial automation, robot technology and other fields.

[0027] The front end cover 11 is provided with a front end rotating connection part 111, the rear end cover 13 is provided with a rear end rotating connection part 131, the front end rotating connection part 111 is provided with a front end bearing 112, the rear end rotating connection part 131 is provided with a rear end bearing 132, and the front end bearing 112 and the rear end bearing 132 are respectively used for connecting the two ends of the output rotating shaft 4. Specifically, the front end rotating connection part 111 is provided with a front end mounting groove for mounting the front end bearing 112, and the rear end rotating connection part 131 is provided with a rear end mounting groove for mounting the rear end bearing 132. In this embodiment, the front end bearing 112 built in the front end rotating connection part 111 and the rear end bearing 132 arranged in the rear end rotating connection part 131 both play a crucial role. The front end bearing 112 and the rear end bearing 132 are respectively accurately mounted in the front end mounting groove and the rear end mounting groove, which ensures the stable positioning and effective operation of the bearings. This design not only improves the overall structural strength of the servo motor, but also significantly enhances the rotation stability and durability of the output rotating shaft 4. In actual application, the cooperation of the front end bearing and the rear end bearing 132 greatly reduces the friction and wear of the output rotating shaft 4 during rotation, thereby effectively improving the operation efficiency and precision of the servo motor. At the same time, the design of the bearing mounting groove also facilitates the maintenance and replacement of the servo motor in the later stage, reduces the maintenance cost, and improves the reliability and service life of the equipment.

[0028] The outer periphery of the front end cover 11 is provided with a front end assembly step 113, and the outer periphery of the rear end cover 13 is provided with a rear end assembly step 133, which are respectively used for connecting and fixing the two ends of the housing 12. In this embodiment, the assembly steps not only provide a stable connection interface for the two ends of the housing 12, but also ensure the accurate positioning and close cooperation of the internal structure of the motor. The servo motor can significantly reduce vibration and noise during operation, improve the overall operation stability and service life. In addition, the arrangement of the front end assembly step 113 and the rear end assembly step 133 simplifies the assembly process of the motor and improves the production efficiency. During assembly, these steps can be used as positioning reference to quickly and accurately complete the connection of the housing and the end cover, reduce the assembly error, and ensure the consistency of the motor performance.

[0029] The fixing step 122 is arranged in the accommodation cavity 121, and the stator assembly 2 is arranged on the fixing step 122. In this embodiment, the fixing step 122 provides a stable and accurate assembly reference for the stator assembly 2, ensuring the accurate positioning of the stator in the motor, thereby effectively improving the operation stability and precision of the motor. In addition, this design also helps to optimize the compactness of the motor structure. The close cooperation of the fixing step 122 and the stator assembly 2 reduces unnecessary space occupation, so that the servo motor is more compact and lightweight while maintaining high performance, which is convenient for integration and application in various devices.

[0030] The stator assembly 2 comprises a stator frame 21 and a stator coil 22. The stator frame 21 is arranged in the accommodation cavity 121, and the inner diameter of the stator frame 21 is provided with a plurality of magnetic yokes 211. The stator coil 22 is wound around the magnetic yokes 211. Specifically, the magnetic yokes 211 are provided with insulating members 212 for insulating and separating the stator coil 22 from the magnetic yokes 211. In this embodiment, the stator frame 21 is ingeniously arranged in the accommodation cavity 121, providing a stable support platform for the stator coil 22 and the magnetic yokes 211, ensuring the stability of the motor structure and the reliability of the operation. By arranging a plurality of magnetic yokes 211 on the inner diameter of the stator frame 21, the stator coil 22 can be orderly and closely wound thereon, which optimizes the distribution of electromagnetic field and improves the electromagnetic efficiency of the motor. In addition, the insulating members 212 designed on the magnetic yokes 211 play a crucial role. They not only effectively insulate and separate the stator coil 22 from the magnetic yokes 211, preventing direct conduction of current and short circuit risk, but also enhance the electrical safety of the motor. This design reduces electromagnetic interference and energy loss, further improving the overall performance and efficiency of the motor.

[0031] The rotor assembly 3 comprises a rotor support 31 and a rotor magnet 32 arranged on the rotor support 31, and one side of the rotor magnet 32 is opposite to the stator assembly 2. Specifically, the rotor support 31 is provided with a plurality of embedding grooves 311, and the rotor magnet 32 is embedded in the embedding grooves 311. Limiting members 312 are arranged in the embedding grooves 311 for limiting the rotor magnet 32 in the embedding grooves 311. The embedding grooves 311 are arranged in two groups per unit, and the two groups of embedding grooves 311 in each unit are arranged in an eight-character symmetric manner. In this embodiment, a plurality of embedding grooves 311 are ingeniously arranged on the rotor support 31, which not only provides stable support for the rotor magnet 32, but also optimizes the distribution of magnetic field through specific layout. The rotor magnet 32 is precisely embedded in the embedding grooves 311, effectively avoiding displacement or loosening during operation, thereby improving the stability and durability of the servo motor. More importantly, the limiting members 312 arranged in the embedding grooves 311 play a crucial role. They can firmly limit the rotor magnet 32 in the embedding grooves 311, ensuring the position stability of the rotor magnet 32 even under high-speed operation or under heavy load, thereby ensuring the output performance and precision of the servo motor. In addition, the design of the embedding grooves 311 adopts a layout of two groups per unit and eight-character symmetry. This design not only enhances the structural strength of the rotor assembly 3, but also further optimizes the magnetic field path, improves the electromagnetic conversion efficiency, and improves the dynamic response speed of the servo motor, reduces energy consumption, and prolongs the service life.

[0032] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A servo motor, characterized in that: The device includes a housing, a stator assembly, a rotor assembly, an output shaft, and an encoder. The housing includes a front cover, a fixed housing, a rear cover, and a rear housing. The fixed housing has a mounting cavity. The front cover and the rear cover are respectively located at both ends of the fixed housing to close the mounting cavity. The rear housing is located at one end of the rear cover. The stator assembly is located within the mounting cavity. Both ends of the output shaft pass through and connect to the front cover and the rear cover. One end of the output shaft is used to connect to the encoder, and the other end is provided with a drive connection end. The rotor assembly is located on the output shaft and is opposite to the stator assembly.

2. The servo motor according to claim 1, characterized in that: The front cover is provided with a front rotating connection part, the rear cover is provided with a rear rotating connection part, the front rotating connection part is provided with a front bearing, and the rear rotating connection part is provided with a rear bearing. The front bearing and the rear bearing are respectively used to connect the two ends of the output shaft.

3. The servo motor according to claim 2, characterized in that: The front-end rotary connection part is provided with a front-end mounting groove for installing a front-end bearing, and the rear-end rotary connection part is provided with a rear-end mounting groove for installing a rear-end bearing.

4. The servo motor according to claim 1, characterized in that: The outer periphery of the front cover is provided with a front assembly step, and the outer periphery of the rear cover is provided with a rear assembly step. The front assembly step and the rear assembly step are respectively used to connect the two ends of the fixed housing.

5. The servo motor according to claim 1, characterized in that: A fixed step is provided inside the mounting cavity, and the stator assembly is mounted on the fixed step.

6. The servo motor according to claim 1, characterized in that: The stator assembly includes a stator frame and a stator coil. The stator frame is disposed in the mounting cavity, and the inner diameter of the stator frame is provided with multiple magnetic yokes. The stator coil is wound on the magnetic yokes.

7. The servo motor according to claim 6, characterized in that: An insulating element is provided on the magnetic yoke, which is used to insulate and separate the stator coil from the magnetic yoke.

8. The servo motor according to claim 1, characterized in that: The rotor assembly includes a rotor support and a rotor magnet disposed on the rotor support, with one side of the rotor magnet facing the stator assembly.

9. The servo motor according to claim 8, characterized in that: The rotor support is provided with multiple slots, and the rotor magnets are embedded in the slots.

10. The servo motor according to claim 9, characterized in that: The groove is provided with a limiting component, which is used to limit the rotor magnet within the groove; the groove is provided in two sets per unit, and the two sets of grooves in each unit are arranged symmetrically in a figure-eight pattern.

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