Compact permanent magnet servo motor for electric roller

Abstract

The utility model belongs to the technical field of motors, and discloses a compact permanent magnet servo motor for an electric roller, which comprises a casing provided with a mounting cavity, and a stator fixedly mounted in the mounting cavity; a front end cover and a rear end cover are installed at the two ends of the machine shell respectively. The rotor is arranged in the shell and is in rotating fit with the stator; the encoder is installed in the machine shell; the encoder comprises a rotor part and a stator part; the rotor part is fixed with the tail end of a rotating shaft of a rotor; the stator part is fixedly connected with the rear end cover; the tail shaft is fixed to the rear end cover and extends in the direction away from the machine shell. And the integral connection of the tail shaft and the shell is realized. The compact permanent magnet servo motor for the electric roller realizes unification of high efficiency, compactness, precision, convenience and reliability, and has remarkable technical advantages and wide market application prospects.

Description

Technical Field

[0001] This utility model belongs to the field of electric motor technology and relates to a compact permanent magnet servo motor for electric drums. Background Technology

[0002] With the rapid development of industrial automation and logistics transportation technologies, electric rollers, due to their compact structure, high transmission efficiency, and superior protective performance, are widely used in conveying equipment, mining machinery, food processing, and logistics sorting. Electric rollers integrate the motor with the roller, achieving a unified design that effectively saves space and simplifies equipment structure. However, existing electric roller motors still face some technical bottlenecks in practical applications, limiting further performance improvements.

[0003] Currently, the main motors used in electric drum units are asynchronous motors and permanent magnet synchronous motors. While asynchronous motors are technologically mature and have lower costs, their lower efficiency and larger size make them difficult to meet the demands of modern industry for efficient and compact designs. Permanent magnet synchronous motors, on the other hand, are gradually becoming the mainstream choice due to their high efficiency, high power density, and good dynamic performance. However, the application of existing permanent magnet synchronous motors in electric drum units still faces some challenges. For example, their structural design makes it difficult to further reduce their size, limiting the applicability of electric drum units in confined spaces. Furthermore, while the integrated design of the motor and drum reduces external transmission components, the entire drum needs to be disassembled during installation and maintenance, increasing operational difficulty and downtime. Additionally, the dynamic response performance of existing motors still needs optimization in scenarios with frequent start-stop cycles or large load variations.

[0004] To address the aforementioned issues, designing a compact permanent magnet synchronous servo motor is of paramount importance. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model proposes a compact permanent magnet servo motor for electric drums that improves their spatial applicability.

[0006] This utility model is achieved through the following technical solution: a compact permanent magnet servo motor for an electric drum, comprising,

[0007] The housing has a mounting cavity in which the stator is fixedly mounted; a front cover and a rear cover are respectively mounted at both ends of the housing.

[0008] The rotor is installed inside the housing and rotates in conjunction with the stator.

[0009] The encoder is installed inside the housing; the encoder includes a rotor part and a stator part, the rotor part is fixed to the tail end of the rotor shaft; the stator part is fixedly connected to the rear end cover.

[0010] The tail shaft is fixed to the rear end cover and extends away from the housing, achieving an integrated connection between the tail shaft and the housing.

[0011] According to this utility model, the tail shaft has through holes for cables to pass through both ends, and a waterproof connector is installed at the outlet of the through hole to achieve sealing and fixing of the cable lead-out.

[0012] According to this utility model, the cable and the encoder signal line located in the through hole are led out through the through hole of the tail shaft.

[0013] According to this utility model, the stator is further installed onto the inner wall of the mounting cavity of the housing via a heat-shrink process.

[0014] According to this utility model, the outer periphery of the rotor is further provided with a front bearing supporting the front end cover and a rear bearing supporting the rear end cover. The front end cover and the rear end cover are both connected to the outer periphery of the housing through fixing components to form a complete fixing structure.

[0015] According to this utility model, the housing is further installed inside the outer shell of the electric drum. An inner end cover is fixedly connected inside the outer shell of the drum. The end of the housing away from the tail shaft is connected to the bushing of the inner end cover by a spline to form an integral whole, so that the rotor, the inner end cover and the outer shell of the drum together constitute the rotating end of the electric drum. When the rotor rotates, it drives the outer shell of the drum to rotate accordingly, so as to realize the normal operation of the electric drum.

[0016] According to this utility model, a short shaft is provided inside the drum shell, and the tail shaft is connected to the short shaft to form a detachable fixed end.

[0017] According to this utility model, roller bearings are further installed on the outer periphery of both the tail shaft and the short shaft to support and fix the rotating parts of the corresponding tail shaft or short shaft.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. Compact structural design: The application of concentrated winding and side fixing method greatly shortens the motor length, saves space, and is suitable for space-constrained occasions;

[0020] 2. High efficiency and performance: The design of the permanent magnet servo motor ensures high efficiency and high performance, while reducing material costs and improving economic efficiency;

[0021] 3. Precise control: The integrated encoder supports start / stop control and real-time position monitoring, making it suitable for applications requiring high-precision positioning and dynamic control;

[0022] 4. Easy disassembly and assembly: The design of fixing the tail shaft and output shaft spline at the tail of the motor allows for quick disassembly of the motor by clamping the tail shaft with a clamp, which facilitates the replacement and maintenance of the motor and significantly reduces maintenance costs and time;

[0023] 5. Integrated design: The motor and the short shaft of the electric drum are integrated into one unit, which simplifies the structure, reduces the number of parts, and improves reliability and functionality;

[0024] 6. Assembly optimization: The side fixing method simplifies the assembly process and improves production efficiency and structural stability.

[0025] 7. High applicability: Its compact design, precise control capabilities, and convenient assembly and disassembly make it suitable for various scenarios such as industrial automation and logistics transportation;

[0026] 8. Ease of maintenance: The motor can be quickly disassembled using the short shaft clamp, which significantly improves maintenance efficiency and is especially suitable for occasions where the motor needs to be frequently replaced or repaired. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the compact permanent magnet servo motor for the electric drum of this utility model;

[0028] Figure 2 This is a schematic diagram of the installation structure of the present invention and the electric roller;

[0029] Figure 3 for Figure 2 A schematic diagram of the isometric structure.

[0030] Among them, 1-front end cover, 2-front bearing, 3-housing, 4-rotor, 5-stator, 6-rear bearing, 7-rear end cover, 8-encoder, 9-tail shaft, 10-waterproof connector, 11-cable, 12-first screw, 13-second screw, 14-drum bearing, 15-short shaft, 16-drum housing, 17-inner end cover. Detailed Implementation

[0031] To facilitate understanding of the utility model's objectives and effects, the specific embodiments of the utility model are as follows, in conjunction with the accompanying drawings:

[0032] like Figure 1As shown, a compact permanent magnet servo motor for electric drum is provided, including a housing 3 with a mounting cavity. A stator 5 is installed onto the inner wall of the mounting cavity of the housing 3 via a heat-fitting process. The heat-fitting process involves heating the housing 3 or cooling the stator 5, allowing the stator 5 to be smoothly inserted into the housing 3. After the temperature recovers, a tight fit is formed, thus completing the installation of the stator 5. A rotor 4, which mates with the stator 5, is fixedly installed in the mounting cavity of the housing 3. Specifically, a front cover 1 and a rear cover 7 are respectively provided at both ends of the housing 3. A front bearing 2 supporting the front cover 1 and a rear bearing 6 supporting the rear cover 7 are respectively provided on the outer periphery of the rotor 4. Both the front cover 1 and the rear cover 7 are connected to the outer peripheral surface of the housing 3 by a second screw 13, forming a complete fixed structure. The second screw 13 points towards the axis of the housing 3, shortening the overall length of the housing and improving the overall compactness of the motor.

[0033] An encoder 8 is also installed inside the mounting cavity of the housing 3. The encoder 8 consists of a rotor and a stator. The rotor of the encoder 8 is fixed to the tail end of the rotor 4 shaft with a nut to ensure a fixed connection between them. The stator of the encoder 8 is fixed to the rear end cover 7 with screws to maintain a stable relative position with the rear end cover 7. The tail shaft 9 is pressed into the corresponding hole in the rear end cover 7 using a press-fitting device to complete the initial installation.

[0034] Furthermore, the tail shaft 9 is secured to the rear end cover 7 using the first screw 12 to ensure a firm connection between the tail shaft 9 and the rear end cover 7. The motor cable 11 and the encoder 8 signal line are led out through the through holes on the rear end cover 7 and the tail shaft 9. A waterproof connector 10 is installed at the outlet of the through hole on the tail shaft 9 to seal and secure the cable 11.

[0035] like Figure 2 and 3 As shown, the motor of this utility model is installed in a corresponding electric drum. The electric drum includes a drum housing 16, and an inner end cover 17 is fixedly connected inside the drum housing 16. The output shaft end of the motor is connected to the bushing of the inner end cover 17 of the electric drum by a spline to form an integral unit. The inner end cover 17 and the drum housing 16 are fixed in a designated position by a press, thereby forming a whole unit consisting of the rotor 4, the inner end cover 17, and the drum housing 16, constituting the rotating end of the electric drum. The tail shaft 9 of the motor and the short shaft 15 inside the electric drum are embedded in the frame through grooves on them to form a fixed end.

[0036] Roller bearings 14 are installed on the outer periphery of the tail shaft 9 and short shaft 15 located inside the drum housing, supporting and fixing the rotating parts of the corresponding tail shaft 9 or short shaft 15, thereby ensuring smooth operation and reducing friction during operation. Current is input and signals are output through cables. When the rotor 4 rotates, the entire drum housing 16 rotates accordingly, realizing the normal operation of the electric drum.

[0037] The motor adopts a permanent magnet synchronous servo motor with a concentrated winding configuration. The concentrated winding effectively shortens the end height, significantly reducing the length of the stator and rotor sections while maintaining motor performance and efficiency, making the motor more compact.

[0038] Side-mounted structure: The front cover 1 and rear cover 7 are fixed to the outer circumferential surface of the housing 3 by the second screw 13, replacing the traditional axial fixing method. This structure further shortens the motor length, optimizes the structural layout, simplifies the assembly process, and improves structural stability.

[0039] Integrated short shaft and spline design: The short shaft 15 of the motor and the electric drum is integrated together; that is, the rear end cover 7 of the motor and the tail shaft 9 are fixed, and the tail shaft 9 is connected to the bushing of the inner end cover 17 of the electric drum through a spline to form a whole. This design not only simplifies the structure of the electric drum, but also facilitates subsequent integral disassembly and replacement. The entire motor can be removed from the electric drum by clamping the motor tail shaft. This structure not only facilitates the disassembly, replacement, and maintenance of the motor, but also reduces maintenance time and labor costs.

[0040] Applications of encoders: Motors integrate encoders, making them suitable for applications requiring high-precision control. Encoders not only support start / stop control but also monitor position in real time, providing accurate feedback signals to meet the needs of complex operating conditions in industrial automation.

[0041] This utility model's motor, with its compact, efficient, precise, and convenient design, is particularly suitable for the following application scenarios: Industrial automation: production line equipment requiring high-precision positioning and dynamic control; Logistics conveying: conveyor systems with limited space and requiring high-efficiency operation; Smart manufacturing: intelligent factories with high requirements for convenient equipment maintenance and reliability; Other scenarios: fields such as food processing and mining conveying that require high-performance electric rollers. In summary, this utility model's compact permanent magnet servo motor for electric rollers achieves a balance of high efficiency, compactness, precision, convenience, and reliability through multiple structural optimizations and technological integration, possessing significant technical advantages and broad market application prospects.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of this utility model are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model still fall within the scope of the technical solution of this utility model.

Claims

1. A compact permanent magnet servo motor for an electric drum, characterized in that, include, The housing has a mounting cavity in which the stator is fixedly mounted; a front cover and a rear cover are respectively mounted at both ends of the housing. The rotor is installed inside the housing and rotates in conjunction with the stator. The encoder is installed inside the housing; the encoder includes a rotor part and a stator part, the rotor part is fixed to the tail end of the rotor shaft; the stator part is fixedly connected to the rear end cover. The tail shaft is fixed to the rear end cover and extends away from the housing, achieving an integrated connection between the tail shaft and the housing.

2. The compact permanent magnet servo motor for electric drum as described in claim 1, characterized in that, The tail shaft has through holes on both ends for cables to pass through, and a waterproof connector is installed at the outlet of the through hole to seal and fix the cable.

3. The compact permanent magnet servo motor for electric drum as described in claim 2, characterized in that, The cable and encoder signal line located in the wire hole are led out through the wire hole of the tail shaft.

4. The compact permanent magnet servo motor for electric drum as described in claim 1, characterized in that, The stator is installed onto the inner wall of the mounting cavity of the housing using a heat-shrink process.

5. The compact permanent magnet servo motor for electric drum as described in claim 1, characterized in that, The rotor is provided with a front bearing that supports the front end cover and a rear bearing that supports the rear end cover. Both the front end cover and the rear end cover are connected to the outer surface of the housing through fixing components to form a complete fixed structure.

6. The compact permanent magnet servo motor for electric drum as described in claim 1, characterized in that, The housing is installed inside the outer shell of the electric drum. An inner end cover is fixedly connected inside the outer shell of the drum. The end of the housing away from the tail shaft is connected to the bushing of the inner end cover by a spline to form a whole, so that the rotor, the inner end cover and the outer shell of the drum together constitute the rotating end of the electric drum. When the rotor rotates, it drives the outer shell of the drum to rotate accordingly, so as to realize the normal operation of the electric drum.

7. The compact permanent magnet servo motor for electric drum as described in claim 6, characterized in that, The drum housing is provided with a short shaft, and the tail shaft is connected to the short shaft to form a detachable fixed end.

8. The compact permanent magnet servo motor for electric drum as described in claim 7, characterized in that, Both the tail shaft and the short shaft are equipped with roller bearings on their outer periphery to support and fix the rotating parts of the corresponding tail shaft or short shaft.

Images