Air-cooled motorized spindle

Abstract

The utility model relates to the technical field of motorized spindles, in particular to an air-cooled motorized spindle, which comprises a casing and a rotating shaft mounted in the casing, an air cylinder is arranged on the rear side of the casing, a fan cover is arranged on the rear side of the air cylinder, a cooling fan is mounted in the fan cover, the casing comprises an outer casing wall and an inner casing wall, and a cooling cavity is arranged between the inner casing wall and the outer casing wall. A front seat and a rear seat are arranged at the front end and the rear end of the rotating shaft respectively and provided with airflow channels, an air cylinder rear cover is mounted at the rear end of the air cylinder, airflow channels are formed in the air cylinder rear cover and a shell of the air cylinder, and a first piston, a first partition plate, a second piston, a second partition plate and a third piston are sequentially arranged on the air cylinder shaft from back to front. A reset spring is connected between the first piston and the first partition plate. According to the utility model, the cooling cavity is arranged on the casing, and the air flow channel is arranged on the air cylinder, so that air blown out by the cooling fan flows through the areas to help heat dissipation; the front seat and the rear seat are also provided with airflow channels, so that the front bearing and the rear bearing can be cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of electric spindles, in particular to an air-cooled electric spindle. Background Art

[0002] As a key component in CNC machine tools and automation equipment, the performance of the air-cooled electric spindle directly affects the overall working effect of the equipment. The air-cooled electric spindle will generate heat during operation, and excessive temperature will affect its performance and life. Therefore, it is necessary to optimize the heat dissipation design and improve the cooling efficiency to keep the spindle working within a suitable temperature range. There are two commonly used spindle cooling methods: liquid cooling and air cooling. Liquid cooling requires the addition of some external equipment. Although the effect is good, it is not suitable for some processing occasions where liquids are prohibited; the cooling effect of air cooling depends on the cooling effect of the axial flow fan, but correspondingly, some air flow channels can be added to other structures, which will greatly improve the cooling effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide an air-cooled electric spindle with significantly improved cooling effect.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an air-cooled electric spindle, comprising a casing and a rotating shaft installed in the casing, a cylinder is arranged on the rear side of the casing, a wind cover is arranged on the rear side of the cylinder, a cooling fan is installed in the wind cover, the casing comprises an outer casing wall and an inner casing wall, a cooling cavity is arranged between the inner casing wall and the outer casing wall, a front seat and a rear seat are respectively arranged at the front and rear ends of the rotating shaft, an air flow channel is arranged on the front seat, a cylinder rear cover is installed at the rear end of the cylinder, and air flow channels are arranged on the cylinder rear cover and the cylinder shell, a first piston, a first partition plate, a second piston, a second partition plate and a third piston are arranged on the cylinder shaft in sequence from back to front, and a reset spring is connected between the first piston and the first partition plate.

[0005] Furthermore, the rear seat is connected to a ring-shaped sensor base, and sensor seats are evenly distributed on the inner wall of the sensor base.

[0006] Furthermore, a pull rod is installed in the rotating shaft, one end of the pull rod is connected to a pull claw, and the other end of the pull rod has a pull rod tail seat contacted and pushed by the cylinder shaft. The pull rod outer sleeve is provided with a spring, one end of the spring is fixed on the pull rod tail seat, and the other end of the spring is connected to the spring pad. An elastic limiter is provided on the front side of the spring pad, and the elastic limiter cooperates with the inner wall of the rotating shaft.

[0007] Furthermore, a rear bearing is provided on the outer periphery of the rear section of the rotating shaft, the rear bearing is mounted on the inner wall of the rear seat, and a rear locking nut is provided on the rotating shaft at the rear side of the rear bearing.

[0008] Furthermore, a front bearing is provided on the outer periphery of the front section of the rotating shaft, the front bearing is mounted on the inner wall of the front seat, and a front locking nut is provided on the rotating shaft at the rear side of the front bearing.

[0009] Furthermore, a front air nozzle is connected to the front seat.

[0010] Furthermore, a dust cover is provided on the outer periphery of the front locking nut, a slot is provided on the front end surface of the dust cover, and the front end of the front locking nut is bent backward to form a barb portion that matches the slot.

[0011] Furthermore, a hole retaining ring is provided on the rear end surface of the first partition.

[0012] Furthermore, the rear end of the cylinder shaft passes through the cylinder rear cover, and the cylinder rear cover is connected to a cylinder cover covering the part of the cylinder shaft extending out of the cylinder rear cover. The cylinder cover is provided with an air flow channel, and the outer shell of the cylinder is provided with a rear air nozzle connected to the air flow channel.

[0013] Furthermore, it also includes a junction box assembly, which is installed outside the casing.

[0014] The beneficial effects of the utility model are as follows: the utility model arranges a cooling cavity on the casing and an air flow channel on the cylinder, so that the wind blown by the cooling fan flows through these areas to help dissipate heat; an air flow channel is also arranged on the front seat, and the air flow enters the air flow channel between the front seat and the dust cover through the front air nozzle, thereby preventing dust from entering the front bearing cavity of the main shaft and damaging the bearing, and at the same time, the front bearing can be cooled to extend the service life of the bearing; three pistons are arranged in the cylinder to improve the working efficiency and output torque of the cylinder, and can provide a faster response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 yes Figure 1 Schematic diagram of the internal structure at A in the middle.

[0018] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0019] In the figure: 1. housing, 2. shaft, 3. cylinder, 4. hood, 5. cooling fan, 6. front seat, 7. rear seat, 8. cylinder rear cover, 9. cylinder shaft, 10. air flow channel, 11. outer shell wall, 12. inner shell wall, 13. cooling cavity, 14. first piston, 15. first partition, 16. second piston, 17. second partition, 18. third piston, 19. reset spring, 20. sensor base, 2 1. Sensor seat, 22. Pull rod, 23. Pull claw, 24. Pull rod tail seat, 25. Spring, 26. Spring washer, 27. Elastic limiter, 28. Rear bearing, 29. Rear locking nut, 30. Front bearing, 31. Front locking nut, 311. Barb part, 32. Front air nozzle, 33. Dust cover, 331. Slot, 34. Circlip for hole, 35. Cylinder head, 36. Rear air nozzle, 100. Junction box assembly. DETAILED DESCRIPTION

[0020] The present invention is now further described in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] like Figure 1 As shown, an air-cooled electric spindle comprises a housing 1 and a rotating shaft 2 installed in the housing 1, a junction box assembly 100 is installed outside the housing 1, a cylinder 3 is arranged at the rear side of the housing 1, a wind cover 4 is arranged at the rear side of the cylinder 3, a cooling fan 5 is installed in the wind cover 4, the housing 1 comprises an outer shell wall 11 and an inner shell wall 12, a cooling cavity 13 is arranged between the inner shell wall 11 and the outer shell wall 12, a front seat 6 and a rear seat 7 are arranged at the front and rear ends of the rotating shaft 2, an air flow channel 10 is arranged on the front seat 6, a cylinder rear cover 8 is installed at the rear end of the cylinder 3, and the cylinder rear cover 8 and the housing of the cylinder 3 are both provided with an air flow channel 10, a first piston 14, a first partition 15, a second piston 16, a second partition 17 and a third piston 18 are arranged on the cylinder shaft 9 from back to front, and a return spring 19 is connected between the first piston 14 and the first partition 15. A hole retaining ring 34 is arranged on the rear end surface of the first partition 15.

[0022] Among them, the rear end of the cylinder shaft 9 passes through the cylinder rear cover 8, and the cylinder rear cover 8 is connected to the cylinder cover 35 covering the part of the cylinder shaft extending out of the rear cover of the cylinder 3. The cylinder cover 35 is provided with an air flow channel 10, and the outer shell of the cylinder 3 is provided with a rear air nozzle 36 connected to the air flow channel 10.

[0023] A pull rod 22 is installed in the rotating shaft 2, one end of which is connected to a pull claw 23, and the other end of the pull rod 23 has a pull rod tail seat 24 that is contacted and pushed by the cylinder shaft 9. A spring 25 is provided on the outer sleeve of the pull rod 22, one end of the spring 25 is fixed on the pull rod tail seat 24, and the other end of the spring 25 is connected to the spring pad 26. An elastic stopper 27 is provided on the front side of the spring pad 26, and the elastic stopper 27 cooperates with the inner wall of the rotating shaft 2. A rear bearing 28 is provided on the outer periphery of the rear section of the rotating shaft 2, and the rear bearing 28 is installed on the inner wall of the rear seat 7, and a rear locking nut 29 is provided on the rotating shaft behind the rear bearing 28. A front bearing 30 is provided on the outer periphery of the front section of the rotating shaft 2, and the front bearing 30 is installed on the inner wall of the front seat 6, and a front locking nut 31 is provided on the rotating shaft 2 behind the front bearing 30. A front air nozzle 32 is connected to the front seat 6.

[0024] like Figure 3 As shown, a dust cover 33 is provided on the outer periphery of the front locking nut 31, a slot 331 is provided on the front end surface of the dust cover 33, and the front end of the front locking nut 31 is bent backward to form a barb portion 311 that matches the slot 331. The dust cover 33 is provided to prevent dust from entering the airflow channel 10, and the slot 331 and the barb 311 are provided to match to ensure the connection effectiveness of the dust cover 33.

[0025] like Figure 2 As shown, the rear seat 7 is connected to a ring-shaped sensor base 20, and sensor seats 21 are evenly distributed on the inner wall of the sensor base 20. Sensors such as temperature sensors and speed sensors are installed on the sensor base 21 to detect the temperature inside the main shaft, the speed of the rotating shaft 2, etc.

[0026] The electric spindle is provided with a cooling cavity 13 on the casing 1 and an air flow channel 10 on the cylinder 3, so that the wind blown by the cooling fan flows through these areas to help dissipate heat; the air flow channel 10 is provided on the front seat 6, and the air flow enters the air flow channel between the front seat and the dust cover through the front air nozzle to prevent dust from entering the front bearing cavity of the spindle and damaging the bearing. At the same time, the front bearing can be cooled to extend the service life of the bearing; three pistons are provided in the cylinder 3 to improve the working efficiency and output torque of the cylinder 3, and can provide a faster response time.

[0027] The above-mentioned implementation mode is only for illustrating the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An air-cooled electric spindle, comprising a housing (1) and a rotating shaft (2) installed in the housing (1), a cylinder (3) being arranged at the rear side of the housing (1), a wind shield (4) being arranged at the rear side of the cylinder (3), a cooling fan (5) being installed in the wind shield (4), characterized in that: The casing (1) comprises an outer casing wall (11) and an inner casing wall (12), a cooling cavity (13) being provided between the inner casing wall (12) and the outer casing wall (11), a front seat (6) and a rear seat (7) being provided at the front and rear ends of the rotating shaft (2), an air flow channel (10) being provided on the front seat (6), a cylinder rear cover (8) being installed at the rear end of the cylinder (3), an air flow channel (10) being provided on the cylinder rear cover (8) and the casing of the cylinder (3), a first piston (14), a first partition plate (15), a second piston (16), a second partition plate (17) and a third piston (18) being provided on the cylinder shaft (9) in sequence from the back to the front, and a return spring (19) being connected between the first piston (14) and the first partition plate (15).

2. The air-cooled electric spindle according to claim 1, characterized in that: The rear seat (7) is connected to a ring-shaped sensor base (20), and sensor seats (21) are evenly distributed on the inner wall of the sensor base (20).

3. The air-cooled electric spindle according to claim 1, characterized in that: A pull rod (22) is installed in the rotating shaft (2), one end of the pull rod (22) is connected to a pull claw (23), the other end of the pull rod (22) has a pull rod tail seat (24) contacted and pushed by the cylinder shaft (9), a spring (25) is provided on the outer sleeve of the pull rod (22), one end of the spring (25) is fixed on the pull rod tail seat (24), the other end of the spring (25) is connected to a spring pad (26), an elastic limiter (27) is provided on the front side of the spring pad (26), and the elastic limiter (27) is matched with the inner wall of the rotating shaft (2).

4. The air-cooled electric spindle according to claim 1, characterized in that: A rear bearing (28) is provided on the outer periphery of the rear section of the rotating shaft (2), the rear bearing (28) is mounted on the inner wall of the rear seat (7), and a rear locking nut (29) is provided on the rotating shaft (2) at the rear side of the rear bearing (28).

5. The air-cooled electric spindle according to claim 1, characterized in that: A front bearing (30) is provided on the outer periphery of the front section of the rotating shaft (2), and the front bearing (30) is mounted on the inner wall of the front seat (6). A front locking nut (31) is provided on the rotating shaft (2) at the rear side of the front bearing (30).

6. The air-cooled electric spindle according to claim 5, characterized in that: The front seat (6) is connected to a front air nozzle (32).

7. The air-cooled electric spindle according to claim 5, characterized in that: A dust cover (33) is provided on the outer periphery of the front locking nut (31), a clamping groove (331) is provided on the front end surface of the dust cover (33), and the front end of the front locking nut (31) is bent backward to form a barb portion (311) that matches the clamping groove (331).

8. The air-cooled electric spindle according to claim 1, characterized in that: A hole retaining ring (34) is provided on the rear end surface of the first partition plate (15).

9. The air-cooled electric spindle according to claim 1, characterized in that: The rear end of the cylinder shaft (9) passes through the cylinder rear cover (8), and the cylinder rear cover (8) is connected to a cylinder cover (35) that covers the portion of the cylinder shaft (9) that extends out of the cylinder rear cover (8). The cylinder cover (35) is provided with an air flow channel (10), and the outer shell of the cylinder (3) is provided with a rear air nozzle (36) that is connected to the air flow channel (10).

10. The air-cooled electric spindle according to claim 1, characterized in that: It also includes a junction box assembly (100), wherein the junction box assembly (100) is installed outside the casing (1).

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