Quick-response double-closed-loop control energy-saving servo motor

Abstract

The utility model belongs to the field of servo motors, and provides a quick-response double-closed-loop control energy-saving servo motor, which comprises a motor shell, a rotor, a stator, a junction box, an electric control box, an encoder, a motor driver, a motor shaft, a front end cover, a rear end cover, a cooling fan and a rear shell, the cooling fan comprises a transmission shaft, a fixed fan blade and a folding fan blade, and a dynamic balance spring is arranged between the folding fan blade and the fixed fan blade. The lateral air outlet holes are formed in the rear shell, so that the air outlet range can be enlarged, the heat exchange efficiency of the equipment and the environment is improved, and the baffling ring plates are adopted to play a role in baffling and dust prevention; the relative angle between the folding fan blades and the fixed fan blades can change along with the change of the rotating speed of the heat dissipation fan, the air outlet amount is increased with a large field angle under the condition that the motor runs at a high speed to generate much heat, the heat dissipation performance and the energy-saving performance of the device are improved, and the device is suitable for large-scale popularization.

Description

Technical Field

[0001] This utility model belongs to the field of servo motors, and in particular relates to a fast-response dual closed-loop control energy-saving servo motor. Background Technology

[0002] Servo motors are suitable for applications requiring high precision, speed, and / or torque, such as robots, CNC machine tool spindles, and precision positioning systems. AC servo motor drive systems are typically closed-loop controlled, as illustrated in the servo motor, driver, and control system disclosed in patent CN202021748696.3. The driver directly samples the feedback signal from the motor encoder, internally forming position and speed loops, which helps to achieve and ensure a certain level of rapid response capability for the servo motor. Since the motor's heat dissipation performance directly affects its actual response performance, improving its heat dissipation helps ensure its response efficiency and energy-saving effects during actual operation.

[0003] Existing patent CN209860745U discloses an energy-saving servo motor, including a motor housing, a drive shaft, and a junction box. The motor housing has evenly distributed heat dissipation fins on its outer side and heat dissipation holes on its side. The drive shaft is located in the middle of the motor housing, and a connection slot is provided on the outer right end of the motor housing. A heat sink is provided on the right end of the motor housing. A connecting movable shaft is connected to the right side of the cooling fan, and a connection slot is provided in the middle of the left side of the cooling fan. The junction box is located above the motor housing, and an electrical control box is located above the junction box. An encoder is installed inside the electrical control box, and a voltage and speed regulator is provided on the side of the encoder. A connecting fixing seat is provided on the lower side of the junction box. This energy-saving servo motor improves its energy-saving performance by incorporating a cooling fan coaxially connected to the drive shaft and a heat sink. However, the openings in the heat sink are all axial. Different servo motors are installed in different locations in actual application scenarios. In cases where the axial space is narrow, it is not conducive to heat exchange between the tail end of the servo motor and the outside air, affecting the heat dissipation and energy-saving performance of the equipment. Furthermore, the blade angle of most cooling fans is fixed. Since the servo motor automatically changes speed, the air volume of the cooling fan cannot be flexibly adjusted, which affects the actual heat dissipation effect of the motor to a certain extent, especially when the servo motor generates a lot of heat at high speed. Utility Model Content

[0004] This invention addresses the technical problems existing in the aforementioned energy-saving servo motors by proposing a fast-response dual-closed-loop control energy-saving servo motor with a reasonable design, simple structure, good heat dissipation effect, and beneficial effect on improving the energy-saving performance of the motor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The fast-response dual-closed-loop control energy-saving servo motor provided by this utility model includes a motor housing, inside which a rotor and a stator are arranged; a junction box and an electrical control box are arranged on the top of the motor housing; an encoder is arranged inside the electrical control box; a motor driver is arranged at the control end of the encoder; a motor shaft is arranged at the center of the motor housing; a front cover and a rear cover are arranged at both ends of the motor housing; a cooling fan coaxially connected to the motor shaft is arranged at the rear end of the rear cover; a rear shell connected to the motor is arranged outside the cooling fan; and a rear end of the rear shell is provided with... The rear housing has two rings of axially spaced side air outlets on its side. Inside the rear housing are two axially staggered baffle plates, the front-to-back distance between the two baffle plates being greater than the front-to-back distance between the two rings of side air outlets. Multiple ribs arranged in a circular array are arranged between the baffle plates. The cooling fan includes a drive shaft keyed to the motor shaft. Multiple fixed fan blades arranged in a circular array are arranged on the side of the drive shaft. Folding fan blades are mounted on the fixed fan blades, with a fixed top and a movable bottom. A dynamic balance spring is provided between the folding fan blades and the fixed fan blades.

[0006] Preferably, the fixed fan blade is provided with a plate-shaped groove that cooperates with the folding fan blade, and a hollow corner post is provided on the side of the fixed fan blade facing away from the folding fan blade. The hollow corner post is perpendicular to the fixed fan blade and is used to install a dynamic balance spring inside.

[0007] Preferably, the two baffle rings are a first baffle ring and a second baffle ring, both of which have L-shaped cross-sections. The inner ring diameter of the second baffle ring is smaller than that of the first baffle ring, and the inner ring diameter of the second baffle ring is larger than that of the fixed fan blade.

[0008] Preferably, a sealing ring is provided at the inner end of the rear shell, and the end of the sealing ring is provided with a plurality of U-shaped slots, which are used to engage with screws provided on the rear end cover.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0010] 1. The fast-response dual-closed-loop control energy-saving servo motor provided by this utility model increases the air outlet range by opening side air outlets on the rear shell, thereby improving the heat exchange efficiency between the equipment and the environment. Furthermore, the use of a baffle plate serves to deflect airflow and prevent dust accumulation. The relative angle between the folding fan blades and the fixed fan blades can change with the rotational speed of the cooling fan. When the motor is running at high speed and generating significant heat, a larger angle can be used to increase the airflow, which is beneficial for improving the heat dissipation performance of the equipment. This device has a reasonable design, simple structure, good heat dissipation effect, and is conducive to improving the energy-saving performance of the motor, making it suitable for large-scale promotion. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 An isometric view of a fast-response dual-closed-loop control energy-saving servo motor provided for an embodiment;

[0013] Figure 2 Assembly diagram of the tail structure of the energy-saving servo motor with fast response dual closed-loop control;

[0014] Figure 3 A cross-sectional view of the rear housing and sealing ring provided for an embodiment;

[0015] Figure 4 for Figure 1 Enlarged schematic diagram of structure A in the middle;

[0016] In the above figures, 1. Motor housing; 2. Junction box; 3. Motor shaft; 4. Front cover; 5. Rear cover; 6. Cooling fan; 61. Drive shaft; 62. Fixed fan blade; 63. Folding fan blade; 64. Dynamic balance spring; 65. Plate-shaped groove; 66. Hollow corner column; 7. Rear shell; 71. Air outlet grille hole; 72. Side air outlet hole; 73. Baffle plate; 731. First baffle plate; 732. Second baffle plate; 74. Rib plate; 8. Sealing ring; 81. U-shaped slot; 9. Screw. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Examples, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fast-response dual-closed-loop control energy-saving servo motor provided by this utility model includes a motor housing 1. The motor housing 1 contains a rotor and a stator. A junction box 2 and an electrical control box are located on the top of the motor housing 1. An encoder is located inside the electrical control box, and a motor driver is located at the control end of the encoder. The motor driver can sample the encoder feedback signal, forming a position loop and a speed loop, which helps to achieve and ensure that the servo motor has a certain fast response capability. Further, a motor shaft 3 is located at the center of the motor housing 1, and a front cover 4 and a rear cover 5 are located at both ends of the motor housing 1. A cooling fan 6, coaxially connected to the motor shaft 3, is located at the rear end of the rear cover 5. A rear shell 7, connected to the motor, is located outside the cooling fan 6, and an air outlet grille 71 is located at the rear end of the rear shell 7. The outer periphery of the motor housing 1 is provided with heat dissipation fins. The rotor and stator, junction box 2, electrical control box, encoder, motor driver, motor shaft 3, front cover 4, rear cover 5, cooling fan 6, and rear shell 7 are all existing technologies, and will not be described in detail here.

[0020] Based on this, in order to improve the energy-saving performance of this device, the present invention provides two rings of axially spaced side air outlets 72 on the side of the rear shell 7, and two axially staggered baffle plates 73 inside the rear shell 7. The front-to-back distance between the two baffle plates 73 is greater than the front-to-back distance between the two rings of side air outlets 72. Multiple ribs 74 arranged in a circular array are provided between the baffle plates 73. The cooling fan 6 includes a transmission shaft 61 keyed to the motor shaft 3. Multiple fixed fan blades 62 arranged in a circular array are provided on the side of the transmission shaft 61. Folding fan blades 63 are provided on the fixed fan blades 62. The top end of the folding fan blades 63 is a fixed end and its bottom end is a movable end. A dynamic balance spring 64 is provided between the folding fan blades 63 and the fixed fan blades 62. Specifically, the air outlet grille 71 on the rear shell 7 allows direct air exchange with the axial airflow of the rear shell 7. Furthermore, by opening side air outlets 72 on the rear shell 7, the airflow range can be increased, improving the heat exchange efficiency between the equipment and the environment, especially when the axial space for installation is limited. Simultaneously, the baffle ring plate 73 forms a baffle space through an axially staggered arrangement, and several stiffeners 74 divide this baffle space into several channels. The side air outlets 72 communicate with the airflow inside the rear shell 7 through this baffle space, which serves both as a baffle and a dust barrier.

[0021] Furthermore, the top of the folding fan blade 63 is foldably connected to the top of the fixed fan blade 62. When the cooling fan 6 provided by this utility model is running at variable speed, the relative angle between the folding fan blade 63 and the fixed fan blade 62 can change with the rotation speed of the cooling fan 6. Especially when the motor is running at high speed and generating a lot of heat, a larger angle can be used to increase the air volume. When the motor is running at low speed, the angle between the folding fan blade 63 and the fixed fan blade 62 is increased, dividing the air outlet section into several smaller sections, which is beneficial to ensure air outlet efficiency and improve the heat dissipation performance of the equipment, thereby improving the energy-saving operation performance of the equipment.

[0022] To improve the cooperation performance between the folding fan blade 63 and the fixed fan blade 62, the fixed fan blade 62 provided by this utility model is provided with a plate-shaped groove 65 that cooperates with the folding fan blade 63. The fixed end of the folding fan blade 63 is located at the top edge of the groove 65. At the same time, a hollow corner post 66 is provided on the side of the fixed fan blade 62 facing away from the folding fan blade 63. The hollow corner post 66 is perpendicular to the fixed fan blade 62 and is used to install a dynamic balance spring 64 inside. The dynamic balance spring 64 is used to limit the maximum and minimum opening angle of the folding fan blade 63 and ensure the relative static balance of the folding fan blade 63 and the fixed fan blade 62 at a stable speed. Especially when the cooling fan 6 decelerates and runs at low speed, it can effectively increase the distance between the fixed fan blade 62 and the folding fan blade 63 and maintain this distance relatively stable, thereby ensuring the actual airflow at the rear of the motor.

[0023] To improve the heat dissipation performance of this servo motor, the two baffle ring plates 73 provided in this invention are a first baffle ring plate 731 and a second baffle ring plate 732. Both the first baffle ring plate 731 and the second baffle ring plate 732 have L-shaped cross-sections. The inner ring diameter of the second baffle ring plate 732 is smaller than that of the first baffle ring plate, and the inner ring diameter of the second baffle ring plate is larger than the rotation diameter of the fixed fan blade 62. This not only forms a baffle channel with a reasonable spacing between the two baffle ring plates 73, but also reduces the probability of dust intruding into the interior of the rear housing 7. While improving heat dissipation around the rear housing 7, it also reduces the frequency of cleaning the interior of the rear housing 7.

[0024] To improve the reliability of the connection between the rear shell 7 and the rear end cover 5, considering that the rear shell 7 and the rear end cover 5 are generally connected by screws 9, this utility model provides a sealing ring 8 at the inner end of the rear shell 7. The end of the sealing ring 8 is provided with multiple U-shaped slots 81, which are used to engage with the screws 9 provided on the rear end cover 5. The sealing ring engaged between the rear shell 7 and the rear end cover 5 can improve the tension of the connection between the three, which is beneficial to improving the reliability of the connection between the rear shell 7 and the rear end cover 5, and can also reduce the noise generated by the vibration of the rear shell 7 to a certain extent.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A fast-response dual-closed-loop control energy-saving servo motor, comprising a motor housing, a rotor and a stator disposed inside the motor housing, a junction box and an electrical control box disposed on the top of the motor housing, an encoder disposed inside the electrical control box, a motor driver disposed at the control end of the encoder, a motor shaft disposed at the center of the motor housing, a front cover and a rear cover disposed at both ends of the motor housing, a cooling fan coaxially connected to the motor shaft disposed at the rear end of the rear cover, a rear shell connected to the motor disposed outside the cooling fan, and an air outlet grille disposed at the rear end of the rear shell, characterized in that... The rear shell has two rings of axially spaced side air outlets on its side. Inside the rear shell, there are two axially staggered baffle plates. The front-to-back distance between the two baffle plates is greater than the front-to-back distance between the two rings of side air outlets. Multiple ribs arranged in a circular array are arranged between the baffle plates. The cooling fan includes a drive shaft connected to the motor shaft. Multiple fixed fan blades arranged in a circular array are arranged on the side of the drive shaft. Folding fan blades are arranged on the fixed fan blades. The top end of the folding fan blade is fixed and its bottom end is movable. A dynamic balance spring is arranged between the folding fan blades and the fixed fan blades.

2. The fast-response dual-closed-loop control energy-saving servo motor according to claim 1, characterized in that, The fixed fan blade is provided with a plate-shaped groove that cooperates with the folding fan blade. The fixed fan blade is provided with a hollow corner post on the side facing away from the folding fan blade. The hollow corner post is perpendicular to the fixed fan blade and is used to install a dynamic balance spring inside.

3. The fast-response dual-closed-loop control energy-saving servo motor according to claim 2, characterized in that, The two baffle rings are designated as the first baffle ring and the second baffle ring. Both the first baffle ring and the second baffle ring have L-shaped cross-sections. The inner ring diameter of the second baffle ring is smaller than that of the first baffle ring, and the inner ring diameter of the second baffle ring is larger than the rotation diameter of the fixed fan blade.

4. The fast-response dual-closed-loop control energy-saving servo motor according to claim 3, characterized in that, A sealing ring is provided at the inner end of the rear shell, and multiple U-shaped slots are provided at the end of the sealing ring. The U-shaped slots are used to engage with screws provided on the rear end cover.

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