Electric spindle sealing structure

Abstract

The utility model discloses a motorized spindle sealing structure, which relates to the field of motorized spindle sealing and comprises a driving device and a spindle body rotatably arranged on the driving device, an end cover sleeved on the spindle body is fixed on the side wall of the driving device, and a sealing cover is mounted on the end cover. An oil film sealing mechanism is arranged between the end cover and the main shaft body, a filtering frame is embedded and clamped in one end of the sealing cover, an air outlet is formed in the other end of the sealing cover, and a wind power mechanism located in the center of the sealing cover is installed on the main shaft body. Fine particles are blocked through the sealing oil, the situation that the service life is affected due to the fact that the fine particles fall between driving equipment and the main shaft body is avoided, clean air forms a protection wall between the air outlet and the main shaft body, the fine particles in the air are further blocked, and the service life is prolonged. Meanwhile, after the sealing cover is unscrewed, the filtering frame can be conveniently detached and replaced.

Description

Technical Field

[0001] This utility model relates to the field of electric spindle sealing, specifically to an electric spindle sealing structure. Background Technology

[0002] An electric spindle is a type of spindle that integrates the machine tool spindle and the spindle motor in the field of CNC machine tools. It generally includes a machine body, a stator and a rotor installed in the machine body, and a protruding cutting head installed at one end of the machine body. End caps are required at both ends of the machine body for sealing.

[0003] When the spindle rotates at high speed, there will inevitably be a certain gap between the spindle and the end cover. The abrasive particles and metal powder that fall off will be sprayed onto the front cover with the coolant, and then enter the spindle through the gap between the front cover and the spindle. These tiny particles, along with dust in the air, fall into the gap between the spindle and the end cover, which will increase rotational friction, damage the mating surface between the spindle and the bearing, and accelerate the damage rate of the spindle. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an electric spindle sealing structure to solve the technical problem that detached abrasive particles and metal powder will be sprayed onto the front end cover with the coolant, and then enter the electric spindle through the gap between the front end cover and the shaft. These tiny particles, along with dust in the air, fall into the gap between the shaft and the end cover, which will increase rotational friction, damage the mating surface between the shaft and the bearing, and accelerate the damage speed of the electric spindle.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric spindle sealing structure, including a drive device and a spindle body rotatably mounted on the drive device, an end cover fixed to the side wall of the drive device and sleeved on the spindle body, a sealing cover installed on the end cover, an oil film sealing mechanism provided between the end cover and the spindle body, a filter frame embedded and snapped into one end of the sealing cover, and an air outlet provided at the other end of the sealing cover, and a wind mechanism located at the center of the sealing cover is installed on the spindle body.

[0006] The present invention is further configured such that the end cap is provided with a mounting part, and the side wall of the mounting part is provided with bolts threaded into the driving device in a ring array.

[0007] The present invention is further configured such that the outer wall of the sealing cover is provided with air inlet slots in a ring array corresponding to the filter frame, and the filter frame is embedded with a filter element.

[0008] The present invention is further configured such that the end cap is provided with a connecting part, and the sealing cap is threadedly sleeved on the connecting part.

[0009] The present invention is further configured such that the wind power mechanism includes an installation ring embedded in and snapped onto the main shaft body, and blades arranged in a ring array fixed to the outer wall of the installation ring.

[0010] The present invention is further configured such that the oil film sealing mechanism includes a negative pressure lubrication cavity formed on the inner wall of the end cover and a groove formed on the main shaft body, wherein the groove corresponds to the negative pressure lubrication cavity.

[0011] The present invention is further configured such that the outer wall of the end cap is provided with a plurality of oil storage chambers in a ring array corresponding to the negative pressure lubrication chamber, and the side wall of the oil storage chamber is threaded with a sealing plug.

[0012] In summary, the present invention has the following beneficial effects: By fixing an end cover to the drive unit and providing a negative pressure lubrication chamber on the inner wall of the end cover, and keeping the oil storage chamber sealed by a sealing plug, the sealing oil between the negative pressure lubrication chamber and the groove is adsorbed. This allows the main spindle body to block fine particles during rotation through the sealing oil, preventing fine particles from falling between the drive unit and the main spindle body and affecting its service life.

[0013] With mounting rings and blades fixed on the main shaft body and a sealing cap threaded onto the side wall of the end cover, the main shaft body rotates while air enters through the air inlet slot and is discharged through the air outlet. During the airflow, the air is filtered by the filter element in the filter frame, forming a protective wall between the air outlet and the main shaft body, further blocking fine particles in the air. At the same time, the filter frame can be easily disassembled and replaced after the sealing cap is unscrewed. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the end cap structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the sealing cap of this utility model;

[0017] Figure 4 This is a cross-sectional structural diagram of the main shaft body of this utility model.

[0018] In the diagram: 1. Drive unit; 2. End cover; 3. Sealing cover; 4. Main shaft body; 5. Air inlet slot; 6. Bolt; 7. Mounting part; 8. Connecting part; 9. Blade; 10. Air outlet; 11. Filter frame; 12. Filter element; 13. Mounting ring; 14. Negative pressure lubrication chamber; 15. Oil storage chamber; 16. Groove; 17. Sealing plug. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] An electric spindle sealing structure, such as Figure 1-4 As shown, the device includes a drive unit 1 and a main shaft body 4 rotatably mounted on the drive unit 1. An end cover 2 is fixed to the side wall of the drive unit 1 and sleeved on the main shaft body 4. A sealing cover 3 is installed on the end cover 2. An oil film sealing mechanism is provided between the end cover 2 and the main shaft body 4. A filter frame 11 is embedded and snapped into one end of the sealing cover 3, and an air outlet 10 is provided at the other end of the sealing cover 3. A wind mechanism located at the center of the sealing cover 3 is installed on the main shaft body 4.

[0021] The present invention is further configured such that the end cover 2 is provided with a mounting part 7, and the side wall of the mounting part 7 is provided with bolts 6 threaded into the drive device 1 in a ring array. The oil film sealing mechanism includes a negative pressure lubrication cavity 14 opened in the inner wall of the end cover 2 and a groove 16 opened in the spindle body 4. The groove 16 corresponds to the negative pressure lubrication cavity 14. The outer wall of the end cover 2 is provided with a plurality of oil storage cavities 15 corresponding to the negative pressure lubrication cavity 14 in a ring array. The side wall of the oil storage cavity 15 is threaded with a sealing plug 17. The oil storage cavity 15 is kept sealed by the sealing plug 17, thereby adsorbing the sealing oil between the negative pressure lubrication cavity 14 and the groove 16. Thus, the spindle body 4 is blocked by the sealing oil during rotation, preventing fine particles from falling between the drive device 1 and the spindle body 4 and affecting the service life.

[0022] Furthermore, the outer wall of the sealing cover 3 is provided with an air inlet slot 5 in a ring array corresponding to the filter frame 11. The filter frame 11 is embedded with a filter element 12. The end cover 2 is provided with a connecting part 8. The sealing cover 3 is threaded onto the connecting part 8. The wind mechanism includes an installation ring 13 embedded and snapped onto the main shaft body 4 and blades 9 fixed in a ring array on the outer wall of the installation ring 13. During the rotation of the main shaft body 4, air enters from the air inlet slot 5 through the blades 9 and is discharged along the air outlet 10. During the air circulation, the air is filtered by the filter element 12 in the filter frame 11, so that clean air forms a protective wall between the air outlet 10 and the main shaft body 4, further blocking fine particles in the air.

[0023] The working principle of this utility model is as follows: When in use, after loosening the sealing plug 17, lubricating oil is added to the oil storage chamber 15 and the negative pressure lubrication chamber 14. Tightening the sealing plug 17 keeps the oil storage chamber 15 sealed, which absorbs the sealing oil between the negative pressure lubrication chamber 14 and the groove 16. This allows the main shaft body 4 to block fine particles during rotation, preventing fine particles from falling between the drive device 1 and the main shaft body 4 and affecting its service life. During the rotation of the main shaft body 4, the blades 9 allow air to enter from the air inlet slot 5 and then be discharged along the air outlet 10. During the air circulation, the air is filtered by the filter element 12 in the filter frame 11, so that clean air forms a protective wall between the air outlet 10 and the main shaft body 4, further blocking fine particles in the air. At the same time, the filter frame 11 can be disassembled and replaced after unscrewing the sealing cap 3.

[0024] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An electric spindle sealing structure, comprising a drive device (1) and a spindle body (4) rotatably mounted on the drive device (1), characterized in that: The drive device (1) has an end cover (2) fixed on the side wall and sleeved on the main shaft body (4). A sealing cover (3) is installed on the end cover (2). An oil film sealing mechanism is provided between the end cover (2) and the main shaft body (4). A filter frame (11) is embedded in one end of the sealing cover (3), and an air outlet (10) is provided at the other end of the sealing cover (3). A wind mechanism located at the center of the sealing cover (3) is installed on the main shaft body (4).

2. The electric spindle sealing structure according to claim 1, characterized in that: The end cap (2) is provided with a mounting part (7), and the side wall of the mounting part (7) is provided with bolts (6) that are threaded into the drive device (1) in a ring array.

3. The electric spindle sealing structure according to claim 1, characterized in that: The outer wall of the sealing cover (3) is provided with an air inlet slot (5) in a ring array corresponding to the filter frame (11), and the filter frame (11) is provided with a filter element (12).

4. The electric spindle sealing structure according to claim 1, characterized in that: The end cap (2) is provided with a connecting part (8), and the sealing cap (3) is threaded onto the connecting part (8).

5. The electric spindle sealing structure according to claim 1, characterized in that: The wind power mechanism includes an installation ring (13) embedded in the main shaft body (4) and blades (9) arranged in a ring array fixed to the outer wall of the installation ring (13).

6. The electric spindle sealing structure according to claim 1, characterized in that: The oil film sealing mechanism includes a negative pressure lubrication chamber (14) opened on the inner wall of the end cover (2) and a groove (16) opened on the main shaft body (4), the groove (16) corresponding to the negative pressure lubrication chamber (14).

7. The electric spindle sealing structure according to claim 6, characterized in that: The outer wall of the end cap (2) is provided with a plurality of oil storage chambers (15) in a ring array corresponding to the negative pressure lubrication chamber (14), and the side wall of the oil storage chamber (15) is threaded with a sealing plug (17).

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