High-precision grinding motor
By introducing an encoder feedback system and an air-cooled heat dissipation structure into the grinding motor, the problems of speed control and heat dissipation of the motor in high-precision grinding are solved, achieving efficient positioning response and environmental adaptability, and improving grinding quality and motor life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI HAIGUANG MOTOR
- Filing Date
- 2025-05-08
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional grinding motors suffer from inaccurate speed control, slow start-up response, and lack of feedback adjustment when machining complex contours or fine surfaces. Furthermore, they generate heat accumulation under high-frequency start-stop and load fluctuations, which can easily lead to component damage and make it difficult to meet the requirements of high-precision machining. At the same time, dust and contaminants can cause bearing wear or electromagnetic system failure.
By employing an encoder positioning feedback system and a wind-cooled heat dissipation structure, combined with a shielded shaft protection design, the motor achieves high-precision speed regulation and real-time positioning, enhances heat dissipation efficiency, and prevents foreign objects from entering through a sealed structure.
It improves the speed regulation accuracy and positioning response capability of the motor, enhances heat dissipation, reduces workpiece surface defects, and extends the service life of the motor, making it suitable for high-precision grinding applications.
Smart Images
Figure CN224154066U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grinding motor technology, specifically to a high-precision grinding motor. Background Technology
[0002] With the widespread application of automated processing equipment, especially in processes such as precision glass products, edge grinding, and polishing, higher requirements are placed on the response speed, control accuracy, and stable operation capability of motors. Traditional grinding motors are mostly ordinary asynchronous motors. Although they can achieve basic rotary drive functions, they have problems such as inaccurate speed control, slow start-up response, and lack of feedback adjustment when dealing with complex contours or fine surface processing, making it difficult to meet the needs of modern high-efficiency and high-precision processing.
[0003] For applications requiring high precision in grinding force and angle variations, maximizing grinding quality and efficiency while minimizing workpiece surface defects necessitates high precision in the motor. Furthermore, the frequent starts and stops and load fluctuations during grinding generate significant heat; failure to dissipate this heat promptly can lead to excessive temperature rise in internal components, performance degradation, and even damage. Additionally, the presence of dust, oil mist, or condensate in the grinding environment poses a risk of foreign matter intrusion, potentially causing bearing wear or electromagnetic system failure.
[0004] In view of the above, this application proposes a high-precision grinding motor to solve the above problems and achieve the effect of integrating encoder positioning feedback, air-cooled heat dissipation system and sealed protection structure in the motor. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides a high-precision grinding motor, which solves the problems mentioned in the background section.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] Includes a housing and a main shaft that extends through the inside of the housing;
[0008] The housing includes a body, a front cover, and a shroud;
[0009] The housing is equipped with a stator and rotor assembly, which is coaxially mounted on the surface of the main shaft.
[0010] The front end cover is located on one side of the shell, and a protective cap is provided at the end away from the shell. A protective ring is provided in the middle of the connection between the protective cap and the front end cover. The surface of the protective cap protrudes outward to form a shielding shaft, and the shielding shaft is set to abut against one edge of the protective ring.
[0011] The fan housing contains an encoding component and a fan. The encoding component is coaxially mounted on the surface of the main shaft located within the fan housing area. One side of the encoding component is connected to one end of the housing by bolts. The fan is located at the end of the encoding component away from the housing. The edge of the fan is inclined toward the inner wall of the fan housing, so that the airflow flows toward the housing when the fan moves.
[0012] Optionally, the end of the housing facing the wind shield is connected to the main shaft via a set of angular contact bearings.
[0013] Optionally, a bearing inner cover is bolted to the inside of the front end cover.
[0014] Optionally, the front end cover facing the protective cap is connected to the main shaft via two sets of paired thrust bearings.
[0015] Optionally, a retaining ring is provided at one end of the two sets of paired thrust bearings away from the bearing inner cover. The retaining ring is coaxially mounted on the main shaft, and a retaining washer is provided at the middle of the connection between the retaining ring and the paired thrust bearing.
[0016] Optionally, a skeleton oil seal is provided on the side of the retaining ring facing the protective cap, and the skeleton oil seal is coaxially mounted on the main shaft.
[0017] Optionally, the encoding component includes an upper shell, a lower shell, and an encoder;
[0018] The upper shell is connected to the lower shell by bolts;
[0019] The lower shell is connected to the shell body by bolts;
[0020] The encoder is installed in the middle of the connection between the upper and lower shells.
[0021] Preferably, the fan includes a central shaft, fan blades, and an outer ring;
[0022] The central axis is coaxially mounted on the main shaft;
[0023] The fan blades are provided in multiples and are evenly and uniformly distributed in a ring on the central axis;
[0024] The outer ring is fixedly connected to the fan blade away from the central axis, and the outer ring is coaxial with the central axis.
[0025] This utility model provides a high-precision grinding motor, which has the following beneficial effects:
[0026] 1. By setting up the shielding shaft, condensate can be effectively prevented from entering the housing along the axial direction, enhancing the adaptability to the operating environment and extending the service life.
[0027] 2. By tilting the fan, the airflow can be directed to area 11 of the housing, actively enhancing the heat dissipation efficiency of the stator and rotor assembly and bearing parts.
[0028] 3. By setting the encoder, the rotational position information of the motor shaft can be collected in real time and fed back to the control system to form a closed-loop control mechanism, thereby enabling the motor to have higher speed regulation accuracy and positioning response capability during operation; it is particularly suitable for application scenarios with high requirements for grinding force and angle changes, effectively improving grinding quality and efficiency, and reducing workpiece surface defects. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the structure of this utility model;
[0030] Figure 2 This is a schematic cross-sectional view of the present invention.
[0031] Figure 3 This is a schematic diagram of the fan structure of this utility model;
[0032] Figure 4 This is a schematic diagram of the coding component structure of this utility model.
[0033] In the diagram: 1. Housing; 11. Housing body; 111. Stator and rotor assembly; 12. Front cover; 121. Protective cap; 122. Protective ring; 123. Shielding shaft; 13. Fan cover; 131. Encoding assembly; 1311. Upper shell; 1312. Lower shell; 1313. Encoder; 132. Fan; 1321. Central shaft; 1322. Fan blade; 1323. Outer ring; 2. Main shaft; 3. Angular contact bearing; 4. Bearing inner cover; 5. Paired thrust bearing; 6. Retaining ring; 7. Retaining washer; 8. Skeleton oil seal. Detailed Implementation
[0034] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0035] In the description of this utility model, it should be understood that the terms "lateral", "longitudinal", "end", "edge", "sidewall", "upper", "lower", "upper part", "lower part", "directly above", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "end", "head", "tail", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0036] This application proposes a high-precision grinding motor, the details of which are as follows:
[0037] For reference Figure 1-2 This application achieves more precise control of the motor's rotation by setting the coding component 131, and further sets the fan 132 to increase the heat dissipation effect. In addition, to prevent condensate from flowing into the interior, a shielding shaft 123 is set to further form protection.
[0038] For reference Figure 1-2 The housing 1 includes a body 11, a front cover 12 and a fan cover 13, with a main shaft 2 running through its middle section; the main shaft 2 is used to transmit power and torque, which is a common technology in existing motor equipment, and will not be described in detail in this application.
[0039] For reference Figure 1 The housing 11 contains a stator and rotor assembly 111, which is coaxially mounted on the surface of the main shaft 2. The stator and rotor assembly 111 includes components such as stator and rotor, which are core and common technologies in existing motor equipment, and will not be described in detail in this application.
[0040] For reference Figure 1-2 The front cover 12 is located on one side of the housing 11. A protective cap 121 is provided at the end away from the housing 11. A protective ring 122 is provided in the middle of the connection between the protective cap 121 and the front cover 12. The surface of the protective cap 121 protrudes outward to form a shielding shaft 123. The shielding shaft 123 is set against one edge of the protective ring 122. The shielding shaft 123 is set around the surface of the protective cap 121, and the surface is inclined towards the protective ring 122 and its opposite side. Thus, when condensate flows towards the housing 11, it can be shielded by the shielding shaft 123, reducing the water from flowing into the motor and causing damage to the internal parts.
[0041] The connection inside the front cover 12 is further configured such that a bearing inner cover 4 is bolted to the inside of the front cover 12. The side of the front cover 12 facing the protective cap 121 is connected to the main shaft 2 through two sets of paired thrust bearings 5. The bearings are configured based on the required accuracy of the motor to meet the rotational accuracy requirements in the embodiment.
[0042] Two sets of paired thrust bearings 5 are provided with a retaining ring 6 at the end away from the bearing inner cover 4. The retaining ring 6 is coaxially mounted on the main shaft 2. A retaining washer 7 is provided in the middle of the connection between the retaining ring 6 and the paired thrust bearing 5. The retaining ring 6 is used to press the two sets of paired thrust bearings 5 onto the front cover 12, while the retaining washer 7 prevents the retaining ring 6 from loosening during operation.
[0043] For reference Figure 1-2The end of the shell 11 facing the wind shield 13 is connected to the main shaft 2 through a set of angular contact bearings 3, and moves in conjunction with two sets of paired thrust bearings 5 to achieve more precise positioning and higher support strength.
[0044] A skeleton oil seal 8 is provided on the side of the stop ring 6 facing the protective cap 121. The skeleton oil seal 8 is coaxially mounted on the main shaft 2. The skeleton oil seal 8 ensures the rotational seal between the shaft and the motor housing, preventing oil leakage and impurities from entering. An annular connector is provided near the skeleton oil seal 8 to fix the position of the skeleton oil seal 8.
[0045] For reference Figure 3 The fan shroud 13 is equipped with an encoding component 131 and a fan 132. The encoding component 131 is coaxially mounted on the surface of the main shaft 2 located in the area of the fan shroud 13. One side of the encoding component 131 is connected to one end of the housing 11 by bolts. The fan 132 is located at the end of the encoding component 131 away from the housing 11. The edge of the fan 132 is inclined towards the inner wall of the fan shroud 13, so that the airflow flows towards the housing 11 when the fan 132 moves.
[0046] Furthermore, the fan 132 includes a central shaft 1321, fan blades 1322, and an outer ring 1323; the central shaft 1321 is coaxially mounted on the main shaft 2; multiple fan blades 1322 are evenly distributed in a ring on the central shaft 1321; the outer ring 1323 is fixedly connected to the fan blades 1322 away from the central shaft 1321, and the outer ring 1323 is coaxially mounted with the central shaft 1321, wherein the end of the fan blades 1322 away from the central shaft 1321 is inclined, so the fan blades of the connected outer ring 1323 are also inclined; furthermore, the width of the outer ring 1323 will gather a part of the air force, and the inclined setting will blow the air force to the direction of the housing 11 to achieve the heat dissipation effect;
[0047] Specifically, the height of the central shaft 1321 is lower than the height of the outer ring 1323, and the tops of the shaft 1321 and the outer ring 1323 are both set at the same horizontal plane.
[0048] In view of the above, in order to achieve the stability of the outer ring 1323 connection and the lightness of the fan blade 1322, the shape of the fan blade 1322 is set so that the lower surface of the fan blade 1322 is connected to the lower surface of the outer ring 1323 from the lower surface of the central shaft 1321. Its entire path is oblique and the oblique path is set in an arc state, which can increase the pressure distribution between the structures and the stable connection of the outer ring 1323.
[0049] Further references are available. Figure 4The encoder component 131 can acquire its own position, speed or angle information in real time when the motor rotates and feed it back to the control system to achieve closed-loop control. The encoder component 131 is configured as a three-part structure consisting of an upper shell 1311, a lower shell 1312 and an encoder 1313. The upper shell 1311 is connected to the lower shell 1312 by bolts, and the lower shell 1312 is connected to the housing 11 by bolts. The encoder 1313 is installed in the middle of the connection between the upper shell 1311 and the lower shell 1312. Through the cooperation between the structures, the encoder 1313 is stably installed on the housing 11 and works inside the fan cover 13, which also facilitates the repair of parts when the encoder 1313 fails.
[0050] In this invention, the working steps of the device are as follows:
[0051] 1. First, the control system supplies power to the motor, the encoder component 131 starts to power on and enters the monitoring state, and the fan 132 prepares to rotate with the spindle to achieve active heat dissipation;
[0052] 2. Next, the stator and rotor assembly 111 generates electromagnetic force to drive the spindle 2 to rotate. The spindle 2 is stably supported by the internally set paired thrust bearing 5 (front end) and angular contact bearing 3 (rear end) to avoid jumping and offset. The encoder 1313 starts to record the angle, position or speed information of the spindle 2 in real time and feeds it back to the control system to realize closed-loop control speed regulation.
[0053] 3. The rotation of the main shaft 2 drives the fan 132 to rotate synchronously. The inclined fan blades 1322 and outer ring 1323 guide the airflow to the housing 11 area, actively enhancing the heat dissipation efficiency of the stator and rotor assembly 111 and the bearing.
[0054] 4. The skeleton oil seal 8 rotates coaxially with the main shaft 2, always maintaining the seal between the inside of the motor and the outside, preventing oil leakage and the entry of external impurities; the inclined structure of the shielding shaft 123 can effectively block condensate from entering the housing along the axial direction, enhancing the adaptability to the operating environment and extending the service life.
[0055] 5. Encoder 1313 continuously records the spindle operating parameters. If speed deviation or load change occurs, it will be adjusted in real time to ensure the rotational accuracy and torque output of spindle 2.
[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A high-precision polishing motor, characterized in that: Includes a housing (1) and a main shaft (2) that penetrates inside the housing (1); The housing (1) includes a body (11), a front cover (12), and a shroud (13). The housing (11) is provided with a stator and rotor assembly (111) inside, and the stator and rotor assembly (111) is coaxially arranged on the surface of the main shaft (2); The front cover (12) is located on one side of the shell (11), and a protective cap (121) is provided at the end away from the shell (11). A protective ring (122) is provided at the middle of the connection between the protective cap (121) and the front cover (12). The surface of the protective cap (121) protrudes outward to form a shielding shaft (123). The shielding shaft (123) is abutted against one edge of the protective ring (122). The fan cover (13) is equipped with an encoding component (131) and a fan (132) inside. The encoding component (131) is coaxially arranged on the surface of the main shaft (2) located in the area of the fan cover (13). One side of the encoding component (131) is connected to one end of the shell (11) by bolts. The fan (132) is arranged at the end of the encoding component (131) away from the shell (11). The edge of the fan (132) is inclined towards the inner wall of the fan cover (13), so that the airflow flows towards the shell (11) when the fan (132) moves.
2. The high-precision grinding motor according to claim 1, characterized in that: The end of the housing (11) facing the wind shield (13) is connected to the main shaft (2) through a set of angular contact bearings (3).
3. The high precision polishing motor of claim 1, wherein: The front end cover (12) is internally connected to a bearing inner cover (4) by bolts.
4. The high precision polishing motor of claim 1, wherein: The front end cover (12) is connected to the main shaft (2) on the side facing the protective cap (121) via two sets of paired thrust bearings (5).
5. The high precision polishing motor of claim 4, wherein: The two sets of paired thrust bearings (5) are provided with a stop ring (6) at one end away from the bearing inner cover (4). The stop ring (6) is coaxially provided on the main shaft (2). A stop washer (7) is provided in the middle of the connection between the stop ring (6) and the paired thrust bearing (5).
6. The high precision polishing motor of claim 5, wherein: The stop ring (6) is provided with a skeleton oil seal (8) on the side facing the protective cap (121), and the skeleton oil seal (8) is coaxially arranged on the main shaft (2).
7. The high precision polishing motor of claim 1, wherein: The encoding component (131) includes an upper shell (1311), a lower shell (1312), and an encoder (1313). The upper shell (1311) is connected to the lower shell (1312) by bolts; The lower shell (1312) is connected to the shell body (11) by bolts; The encoder (1313) is installed in the middle of the connection between the upper shell (1311) and the lower shell (1312).
8. The high precision polishing motor of claim 1, wherein: The fan (132) includes a central shaft (1321), fan blades (1322), and an outer ring (1323); The central shaft (1321) is coaxially mounted on the main shaft (2); The fan blades (1322) are provided in multiples and are evenly distributed in a ring on the central axis (1321); The outer ring (1323) is fixedly connected to the fan blade (1322) away from the central axis (1321), and the outer ring (1323) is coaxial with the central axis (1321).