Air curtain structure of drilling and tapping center main shaft

Abstract

The air curtain structure of the drilling and tapping center spindle comprises a spindle body and an outer shell, the outer shell is arranged on the spindle body, a containing cavity is jointly formed between the outer shell and the spindle body, an air inlet and an air guide channel are formed in the outer shell, a bearing end cover is arranged at the end of the outer shell, and the bearing end cover is arranged on the outer shell. A plurality of air outlets are formed in the bearing end cover, the air guide channel is communicated with the air inlet and the air outlets, and a plurality of spray heads are movably connected to the peripheral face of the outer shell and communicated with the air guide channel. During use, air is sprayed out at a certain pressure and flow through a compressed air source, two layers of uniform airflow barriers are formed around the main shaft, impurities such as dust and cuttings are prevented from entering the main shaft, the precision of the main shaft is protected, and the service life of the main shaft is prolonged; and the direction of airflow of the spray heads can be changed by moving the spray heads, and the main shaft and the machined workpiece can be cooled in the machining process by enabling the multiple spray heads to face different positions.

Description

Technical Field

[0001] This utility model relates to the field of drilling and tapping center spindle technology, and in particular to an air curtain structure for drilling and tapping center spindles. Background Technology

[0002] The spindle of the tapping and drilling center is one of the key components of the tapping and drilling center. Its functions are: to provide cutting power to drive the tool to rotate at high speed, thereby realizing the cutting of the workpiece; and to ensure machining accuracy by maintaining stability under high-speed operation, reducing vibration, and ensuring the accuracy of machining dimensions and surface quality.

[0003] During the machining process, cutting fluid needs to be sprayed to cool and lubricate the tools and parts; at the same time, iron filings and other contaminants will be generated during the machining process; however, the fitting precision requirements of the internal parts of the spindle are high. If coolant or contaminants such as iron filings enter, it will shorten the service life of the internal parts of the spindle and may even lead to spindle damage. Utility Model Content

[0004] To reduce the possibility of contaminants entering the spindle, this application provides an air curtain structure for the drilling and tapping center spindle.

[0005] The air curtain structure for the drilling and tapping center spindle provided in this application adopts the following technical solution:

[0006] An air curtain structure for a drilling and tapping center spindle includes a spindle body and an outer shell. The outer shell is mounted on the spindle body, and a cavity is formed between the outer shell and the spindle body. The outer shell is provided with an air inlet and an air guide channel. A bearing end cap is provided at the end of the outer shell, and multiple air outlets are provided on the bearing end cap. The air guide channel connects the air inlet and the multiple air outlets. Multiple nozzles are movably connected to the outer circumferential surface of the outer shell, and the multiple nozzles are respectively connected to the air guide channel.

[0007] By adopting the above technical solution, during use, compressed air is sprayed out at a certain pressure and flow rate through a compressed air source, forming two uniform airflow barriers around the spindle to prevent dust, chips and other impurities from entering the spindle, thus protecting the spindle's accuracy and service life. Furthermore, the direction of the airflow can be changed by the movable nozzles. By directing multiple nozzles to different positions, the spindle and workpiece can also be cooled during the machining process.

[0008] Preferably, the nozzle is provided with a nozzle and a ball head, the ball head being movably connected to the outer casing, and the ball head simultaneously connecting the nozzle and the air guide channel.

[0009] By adopting the above technical solution, the direction of the nozzle can be changed by rotating the ball head, making it easy to adjust the direction of the nozzle.

[0010] Preferably, the nozzle is tapered from the end near the nozzle head to the end away from the nozzle head, and the end of the nozzle away from the nozzle head is flat.

[0011] By adopting the above technical solution, the speed of the airflow ejected from the nozzle is increased, making the ejected airflow more uniform and curtain-like, which makes it easier to prevent dust, chips and other impurities from entering the spindle, thus protecting the spindle's precision and service life.

[0012] Preferably, it also includes a bolt, one end of which passes through and is threaded onto the outer casing, and the end of the bolt passing through the outer casing can abut against a ball head.

[0013] By adopting the above technical solution, the bolt is rotated to abut against the ball head, thereby limiting the ball head and reducing the possibility of the ball head rotating during the operation of the spindle.

[0014] Preferably, the outer casing is provided with a first sealing ring and a second sealing ring, the first sealing ring is located on the outer surface of the outer casing, the second sealing ring is located on the inner surface of the outer casing, and the first sealing ring and the second sealing ring abut against the ball head respectively.

[0015] By adopting the above technical solution, and by setting a first sealing ring and a second sealing ring, the first sealing ring can reduce the possibility of dust, chips and other impurities entering the spindle from the gap between the ball head and the housing, thereby protecting the spindle's accuracy and service life; at the same time, it reduces the possibility of airflow from the gap between the ball head and the housing affecting the airflow of the nozzle.

[0016] Preferably, the bearing end cover is provided with an air curtain annular cavity, the air curtain annular cavity is connected to multiple air outlets at the same time, the air guide channel is connected to the air curtain annular cavity, and the end of the air guide channel away from the air inlet is tangent to the air curtain annular cavity.

[0017] By adopting the above technical solution, the direction of airflow entering the air curtain ring cavity is the same as the direction of its movement in the air curtain ring cavity, which reduces the resistance of the gas when it moves in the air curtain ring cavity, makes the ejected airflow more uniform, and reduces the possibility that airflow obstruction will affect the protective effect of the air curtain.

[0018] The main technical effects of this utility model are reflected in the following aspects:

[0019] 1. This utility model, by simultaneously setting nozzles and air outlets, uses a compressed air source to spray air at a certain pressure and flow rate during use, forming two uniform airflow barriers around the spindle to prevent dust, chips, and other impurities from entering the spindle, thus protecting the spindle's precision and service life; and by using movable nozzles, the direction of the airflow can be changed, and by directing multiple nozzles to different positions, it can also cool the spindle and the workpiece during processing.

[0020] 2. This utility model improves the speed of the airflow ejected from the nozzle by setting a nozzle, so that the ejected airflow can be more uniform and set in a curtain shape, which makes it easier to prevent dust, chips and other impurities from entering the spindle, thus protecting the spindle's precision and service life.

[0021] 3. By setting up an air curtain annular groove, this utility model ensures that the direction of airflow entering the air curtain annular cavity is the same as the direction of its movement within the air curtain annular cavity, thereby reducing the resistance of the gas during its movement within the air curtain annular cavity, making the ejected airflow more uniform, and reducing the possibility that airflow obstruction will affect the protective effect of the air curtain. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0023] Figure 2 It is along Figure 1 Enlarged view of point B in the middle.

[0024] Figure 3 It is along Figure 1 View A in the diagram.

[0025] Figure 4 It is along Figure 3 Enlarged view of point C in the middle.

[0026] Figure 5 This is a schematic diagram of the bearing end cover structure according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Main shaft body; 2. Outer shell; 21. Air inlet; 22. Air guide channel; 23. Nozzle; 231. Nozzle; 232. Ball head; 24. Bolt; 25. First sealing ring; 26. Second sealing ring; 3. Bearing end cover; 31. Air outlet; 32. Air curtain ring cavity. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0029] This application discloses an air curtain structure for the drilling center spindle.

[0030] Reference Figures 1-5 This embodiment discloses an air curtain structure for a drilling center spindle, comprising a spindle body 1 and an outer shell 2. The outer shell 2 is mounted on the spindle body 1, and a cavity is formed between the outer shell 2 and the spindle body 1. The outer shell 2 is provided with an air inlet 21 and multiple air guide channels 22. A bearing end cap 3 is provided at the end of the outer shell 2, and multiple air outlets 31 are opened on the bearing end cap 3. The multiple air outlets 31 are evenly distributed around the central axis of the bearing end cap 3. Multiple nozzles 23 are movably connected to the outer circumferential surface of the outer shell 2, and the multiple nozzles 23 are evenly distributed around the central axis of the bearing end cap 3. The multiple air guide channels 22 are respectively connected to the multiple nozzles 23. An air curtain annular cavity 32 is opened on the bearing end cap 3, and the air curtain annular cavity 32 is simultaneously connected to the multiple air outlets 31. The multiple air guide channels 22 are respectively connected to the air curtain annular cavity 32, and the end of the air guide channel 22 away from the air inlet 21 is tangentially arranged with the air curtain annular cavity 32.

[0031] Reference Figures 1-5 During use, compressed air is sprayed out at a certain pressure and flow rate, forming two uniform airflow barriers around the spindle to prevent dust, chips, and other impurities from entering the spindle, thus protecting its precision and service life. Furthermore, the direction of the airflow can be changed by the movable nozzles 23. By directing multiple nozzles 23 towards different positions, cooling of the spindle and workpiece during machining can also be achieved. The air curtain annular cavity 32 ensures that the airflow entering the cavity is in the same direction as its movement within it, reducing resistance and making the sprayed airflow more uniform, minimizing the possibility of airflow obstruction affecting the protective effect of the air curtain.

[0032] Reference Figures 1-3 A nozzle 231 and a ball head 232 are fixedly connected to the nozzle 23. The ball head 232 is movably connected to the outer casing 2 and connects both the nozzle 231 and the air guide channel 22. Rotating the ball head 232 changes the orientation of the nozzle 231, facilitating adjustment of its direction. The nozzle 231 tapers from the end near the nozzle 23 to the end furthest from the nozzle 23, and the end furthest from the nozzle 23 is flattened. This increases the speed of the airflow ejected from the nozzle 23, making the airflow more uniform and curtain-like, thus better preventing dust, chips, and other impurities from entering the spindle, protecting the spindle's precision and lifespan.

[0033] Reference Figure 1 and Figure 2It also includes a bolt 24, one end of which is threaded onto the outer casing 2, and the end of the bolt 24 passing through the outer casing 2 can abut against the ball head 232. By rotating the bolt 24, the bolt 24 abuts against the ball head 232, limiting the ball head 232 and reducing the possibility of the ball head 232 rotating during the operation of the spindle.

[0034] Reference Figure 1 and Figure 2 A first sealing ring 25 and a second sealing ring 26 are fixedly connected to the outer casing 2. The first sealing ring 25 is located on the outer surface of the outer casing 2, and the second sealing ring 26 is located on the inner surface of the outer casing 2. The first sealing ring 25 and the second sealing ring 26 abut against the ball head 232. By setting the first sealing ring 25 and the second sealing ring 26, the first sealing ring 25 can reduce the possibility of dust, chips and other impurities entering the spindle from the gap between the ball head 232 and the outer casing 2, thereby protecting the spindle's accuracy and service life; at the same time, it reduces the possibility of airflow from the gap between the ball head 232 and the outer casing 2 affecting the airflow of the nozzle 231.

[0035] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. An air curtain structure for a drilling and tapping center spindle, characterized in that: The device includes a main spindle body (1) and an outer shell (2). The outer shell (2) is mounted on the main spindle body (1). A cavity is formed between the outer shell (2) and the main spindle body (1). The outer shell (2) is provided with an air inlet (21) and an air guide channel (22). The end of the outer shell (2) is provided with a bearing end cap (3). The bearing end cap (3) is provided with multiple air outlets (31). The air guide channel (22) connects the air inlet (21) and the multiple air outlets (31). Multiple nozzles (23) are movably connected to the outer circumferential surface of the outer shell (2). The multiple nozzles (23) are respectively connected to the air guide channel (22).

2. The air curtain structure for a drilling and tapping center spindle according to claim 1, characterized in that: The nozzle (23) is provided with a nozzle (231) and a ball head (232). The ball head (232) is movably connected to the outer shell (2) and is connected to both the nozzle (231) and the air guide channel (22).

3. The air curtain structure for a drilling and tapping center spindle according to claim 2, characterized in that: The nozzle (231) is tapered from the end near the nozzle (23) to the end away from the nozzle (23), and the end of the nozzle (231) away from the nozzle (23) is flat.

4. The air curtain structure for a drilling and tapping center spindle according to claim 2, characterized in that: It also includes a bolt (24), one end of which is threaded through and connected to the outer shell (2), and the end of the bolt (24) passing through the outer shell (2) can abut against the ball head (232).

5. The air curtain structure for a drilling and tapping center spindle according to claim 2, characterized in that: The outer shell (2) is provided with a first sealing ring (25) and a second sealing ring (26). The first sealing ring (25) is located on the outer surface of the outer shell (2), and the second sealing ring (26) is located on the inner surface of the outer shell (2). The first sealing ring (25) and the second sealing ring (26) respectively abut against the ball head (232).

6. The air curtain structure for a drilling and tapping center spindle according to claim 1, characterized in that: The bearing end cover (3) is provided with an air curtain annular cavity (32), which is connected to multiple air outlets (31) at the same time. The air guide channel (22) is connected to the air curtain annular cavity (32), and the end of the air guide channel (22) away from the air inlet (21) is tangentially arranged with the air curtain annular cavity (32).

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