Air expansion shaft sleeve boring device

Abstract

The utility model relates to the related technical field of air expansion shafts, in particular to an air expansion shaft sleeve boring device which comprises a stand column, a lifting mechanism is arranged on the upper surface of a movable table, a positioning mechanism is arranged on the upper surface of a lower sliding seat, and a tool changing mechanism is arranged on the outer side surface of a spindle box. Through the arrangement of the tool changing mechanism, during use, the spindle box drives the rotating shaft to rotate so as to drive the rotating rod and the clamping clamp to rotate, the clamping clamp is clamped with the clamping groove, and the rotating shaft drives the rotating rod and the clamping clamp to move downwards, so that a tool bit is separated from the tool containing cylinder; the fixing ring opening extrudes the clamping ball, the spring is compressed, when the clamping ball passes through the fixing ring opening, the spring rebounds, the clamping ball is clamped on the fixing ring opening, and the tool bit is fixed in the tool containing cylinder, so that the purpose of replacing the tool bit is achieved, the complexity of replacing the boring tool bit according to the requirements of different devices is reduced, and meanwhile, the operation safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air shaft, in particular to a boring device for an air shaft sleeve. Background Technique

[0002] An air shaft is a special winding and unwinding shaft. It utilizes the principle of air compression to control the change of the outer diameter of the shaft by inflating and deflating, so as to realize the curling and fixing of materials. Therefore, a boring device for an air shaft sleeve is particularly needed.

[0003] However, for the existing boring device for an air shaft sleeve, during use, the boring tool head needs to be replaced according to the specific requirements of different equipment. The frequent replacement of the tool head not only increases the operation complexity, but also when replacing, the operator is easily exposed to sharp blades, with a relatively high safety risk, which is not conducive to ensuring the operation safety and is not convenient and safe enough in actual operation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a boring device for an air shaft sleeve to solve the problems in the above background technique that when some air shafts are in use, the boring tool head needs to be replaced according to the specific requirements of different equipment. The frequent replacement of the tool head not only increases the operation complexity, but also when replacing, the operator is easily exposed to sharp blades, with a relatively high safety risk, which is not conducive to ensuring the operation safety and is not convenient and safe enough in actual operation.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A boring device for an air shaft sleeve, including a bed body. A moving table is slidably connected to the upper surface of the bed body. A lifting mechanism is arranged on the upper surface of the moving table. A driving motor is fixedly connected to the inner surface of the bed body. A conveyor belt is rotatably connected to the outer surface of the driving motor. A conveyor rod is rotatably connected to the inner surface of the conveyor belt. A toothed belt is rotatably connected to the outer surface of the conveyor rod. A blocking strip is fixedly connected to the inner surface of the bed body. A toothed plate is engaged with the upper surface of the toothed belt. A lower sliding seat is fixedly connected to the upper surface of the toothed plate. A positioning mechanism is arranged on the upper surface of the lower sliding seat. A front column is fixedly connected to the upper surface of the bed body. A sliding groove is opened on the outer surface of the front column. A slider is slidably connected to the outer surface of the sliding groove. A main spindle box is fixedly connected to the outer surface of the slider. A second threaded hole is opened on the outer surface of the slider. An electric push rod is fixedly connected to one side surface of the main spindle box. A second motor is fixedly connected to the upper surface of the front column. A second threaded rod is fixedly connected to the lower surface of the second motor. A tool changing mechanism is arranged on the outer surface of the main spindle box;

[0006] The tool changing mechanism includes a main shaft, a faceplate, a hinge, a tool holder cylinder, a fixed collar, a mounting head, a movable groove, a spring, a clamping ball, a clamping groove, a first tool head, a second tool head, a rotating shaft, a rotating rod and a clamping clip. The inner surface of the main spindle box is fixedly connected with the main shaft. A faceplate is fixed on one side surface of the main shaft. The outer surface of the faceplate is fixedly connected with a hinge. The outer surface of the hinge is fixedly connected with a tool holder cylinder. The inner surface of the tool holder cylinder is fixedly connected with a fixed collar. The inner surface of the tool holder cylinder is slidably connected with a mounting head. A movable groove is formed in the inner surface of the mounting head. A spring is slidably connected to the inner surface of the movable groove. A clamping ball is fixedly connected to one side surface of the spring. A clamping groove is formed in the outer surface of the mounting head. A first tool head is fixedly connected to the lower surface of the mounting head. A second tool head is fixedly connected to the lower surface of the mounting head. A rotating shaft is fixedly connected to the outer surface of the main spindle box. A rotating rod is rotatably connected to the outer surface of the rotating shaft. A clamping clip is fixedly connected to one side surface of the rotating rod.

[0007] Preferably, two sets of clamping balls are arranged on the outer surface of the spring, and two sets of clamping clips are arranged on the outer surface of the rotating rod.

[0008] Preferably, the lifting mechanism includes a rear column, a first motor, a first threaded rod, a special-shaped slider, a first threaded hole and a rear bracket. The upper surface of the moving table is fixedly connected with a rear column. The upper surface of the rear column is fixedly connected with a first motor. The lower surface of the first motor is fixedly connected with a first threaded rod. The outer surface of the rear column is slidably connected with a special-shaped slider. A first threaded hole is formed in the outer surface of the special-shaped slider. The outer surface of the special-shaped slider is fixedly connected with a rear bracket.

[0009] Preferably, the outer wall surface size of the rear column matches the inner wall surface size of the special-shaped slider, and the outer wall surface size of the first threaded rod matches the inner surface size of the first threaded hole.

[0010] Preferably, the positioning mechanism includes a limiting strip, a lead screw, a handwheel, an upper sliding seat, a limiting block, a lead screw groove, a servo motor, a screw, a gear disk, a workbench and a T-shaped groove. The upper surface of the lower sliding seat is fixedly connected with a limiting strip. The upper surface of the lower sliding seat is fixedly connected with a lead screw. A handwheel is fixedly connected to one side surface of the lead screw. The outer surface of the lead screw is slidably connected with an upper sliding seat. A limiting block is fixedly connected to the outer surface of the upper sliding seat. A lead screw groove is formed in the outer surface of the upper sliding seat. A servo motor is fixedly connected to the upper surface of the upper sliding seat. A screw is fixedly connected to one side surface of the servo motor. A gear disk is meshed with the outer surface of the screw. The upper surface of the gear disk is fixedly connected with a workbench. A T-shaped groove is formed in the upper surface of the workbench.

[0011] Preferably, two groups of the limiting strips are arranged on the upper surface of the sliding seat below, and the outer wall surface dimension of the lead screw matches the inner wall surface dimension of the lead screw groove.

[0012] Preferably, the workbench and the upper sliding seat form a rotating structure through a gear disk, and multiple groups of T-shaped grooves are arranged on the upper surface of the workbench.

[0013] Preferably, the inner wall surface dimension of the sliding groove matches the outer wall surface dimension of the slider, and the inner wall surface dimension of the second threaded hole matches the outer wall surface dimension of the second threaded rod.

[0014] Compared with the prior art, the beneficial effect of the present utility model is as follows: For this air shaft sleeve boring device, through the setting of the tool changing mechanism, during use, the main spindle box drives the main spindle to rotate, and the main spindle drives the faceplate to rotate, so that the first cutting head can bore holes on the air shaft. When the first cutting head needs to be replaced, the main spindle box drives the rotating shaft to rotate, the rotating shaft drives the rotating rod and the clamping clip to rotate. When the clamping clip touches the mounting head, it engages with the clamping groove on the mounting head. The rotating shaft drives the rotating rod and the clamping clip to move downward, so that the clamping clip separates the first cutting head and the second cutting head from the tool holder. When the clamping clip drives the second cutting head to rotate to the lower part of the tool holder, the rotating shaft drives the rotating rod and the clamping clip to move upward, so that the second cutting head is installed into the tool holder. When the engaging ball touches the fixed ring opening, the fixed ring opening will squeeze the engaging ball, the engaging ball squeezes the spring inward, and the spring compresses. When the engaging ball passes through the fixed ring opening, the spring rebounds and pushes the engaging ball to engage on the fixed ring opening, so that the first cutting head and the second cutting head can be fixed in the tool holder, thus achieving the purpose of replacing the cutting head, reducing the complexity of the operation of replacing the boring cutting head according to the specific requirements of different equipment. During replacement, the operator does not need to contact the sharp blade, improving the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic side view external structure diagram of the present utility model;

[0016] Figure 2 It is a schematic diagram of the cooperating structure of the moving table and the rear column of the present utility model;

[0017] Figure 3 It is a schematic diagram of the cooperating structure of the driving motor and the conveyor belt of the present utility model;

[0018] Figure 4 It is a schematic diagram of the cooperating structure of the sliding seat below and the upper sliding seat of the present utility model;

[0019] Figure 5 It is a schematic diagram of the cooperating structure of the front column and the main spindle box of the present utility model;

[0020] Figure 6Schematic diagram of the mutual cooperation structure of the spindle and the faceplate of the present utility model;

[0021] Figure 7 Schematic diagram of the mutual cooperation structure of the mounting head and the rotating rod of the present utility model.

[0022] In the figure: 1. Bed body; 2. Moving table; 3. Lifting mechanism; 301. Rear column; 302. First motor; 303. First threaded rod; 304. Special-shaped slider; 305. First threaded hole; 306. Rear bracket; 4. Driving motor; 5. Conveyor belt; 6. Conveying rod; 7. Toothed belt; 8. Blocking strip; 9. Toothed plate; 10. Lower slide base; 11. Positioning mechanism; 1101. Limiting strip; 1102. Lead screw; 1103. Handwheel; 1104. Upper slide base; 1105. Limiting block; 1106. Lead screw groove; 1107. Servo motor; 1108. Screw; 1109. Gear disk; 1110. Workbench; 1111. T-shaped groove; 12. Front column; 13. Chute; 14. Slide block; 15. Spindle box; 16. Second threaded hole; 17. Electric push rod; 18. Second motor; 19. Second threaded rod; 20. Tool changing mechanism; 2001. Spindle; 2002. Faceplate; 2003. Folding page; 2004. Tool holder; 2005. Fixed ring; 2006. Mounting head; 2007. Movable groove; 2008. Spring; 2009. Engaging ball; 2010. Clamping groove; 2011. First tool bit; 2012. Second tool bit; 2013. Rotating shaft; 2014. Rotating rod; 2015. Clamping clip. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figure 1-7, the present utility model provides a technical solution: an air shaft sleeve boring device, which includes a bed 1. A moving table 2 is slidably connected to the upper surface of the bed 1. A lifting mechanism 3 is arranged on the upper surface of the moving table 2. A driving motor 4 is fixedly connected to the inner surface of the bed 1. A conveyor belt 5 is rotatably connected to the outer surface of the driving motor 4. A conveyor rod 6 is rotatably connected to the inner surface of the conveyor belt 5. A toothed belt 7 is rotatably connected to the outer surface of the conveyor rod 6. A stop strip 8 is fixedly connected to the inner surface of the bed 1. A toothed plate 9 is engaged with the upper surface of the toothed belt 7. A lower sliding seat 10 is fixedly connected to the upper surface of the toothed plate 9. A positioning mechanism 11 is arranged on the upper surface of the lower sliding seat 10. A front column 12 is fixedly connected to the upper surface of the bed 1. A chute 13 is formed on the outer surface of the front column 12. A slider 14 is slidably connected to the outer surface of the chute 13. A main spindle box 15 is fixedly connected to the outer surface of the slider 14. A second threaded hole 16 is formed on the outer surface of the slider 14. An electric push rod 17 is fixedly connected to one side surface of the main spindle box 15. A second motor 18 is fixedly connected to the upper surface of the front column 12. A second threaded rod 19 is fixedly connected to the lower surface of the second motor 18. A tool changing mechanism 20 is arranged on the outer surface of the main spindle box 15;

[0025] The tool changing mechanism 20 includes a main shaft 2001, a faceplate 2002, a hinge 2003, a tool holder 2004, a fixed collar 2005, a mounting head 2006, a movable groove 2007, a spring 2008, a clamping ball 2009, a clamping groove 2010, a first tool bit 2011, a second tool bit 2012, a rotating shaft 2013, a rotating rod 2014 and a clamping clip 2015. The inner surface of the main spindle box 15 is fixedly connected with the main shaft 2001. One side surface of the main shaft 2001 is fixedly connected with the faceplate 2002. The outer surface of the faceplate 2002 is fixedly connected with the hinge 2003. The outer surface of the hinge 2003 is fixedly connected with the tool holder 2004. The inner surface of the tool holder 2004 is fixedly connected with the fixed collar 2005. The inner surface of the tool holder 2004 is slidably connected with the mounting head 2006. The inner surface of the mounting head 2006 is provided with a movable groove 2007. The inner surface of the movable groove 2007 is slidably connected with the spring 2008. One side surface of the spring 2008 is fixedly connected with the clamping ball 2009. The outer surface of the mounting head 2006 is provided with a clamping groove 2010. The lower surface of the mounting head 2006 is fixedly connected with the first tool bit 2011. The lower surface of the mounting head 2006 is fixedly connected with the second tool bit 2012. The outer surface of the main spindle box 15 is fixedly connected with the rotating shaft 2013. The outer surface of the rotating shaft 2013 is rotatably connected with the rotating rod 2014. One side surface of the rotating rod 2014 is fixedly connected with the clamping clip 2015. Through the arrangement of the main shaft 2001, the faceplate 2002, the hinge 2003, the tool holder 2004, the fixed collar 2005, the mounting head 2006, the movable groove 2007, the spring 2008, the clamping ball 2009, the clamping groove 2010, the first tool bit 2011, the second tool bit 2012, the rotating shaft 2013, the rotating rod 2014 and the clamping clip 2015, when in use, the main spindle box 15 drives the main shaft 2001 to rotate, and the main shaft 2001 drives the faceplate 2002 to rotate, so that the first tool bit 2011 can bore a hole on the air shaft. When it is necessary to replace the first tool bit 2011, the main spindle box 15 drives the rotating shaft 2013 to rotate, and the rotating shaft 2013 drives the rotating rod 2014 and the clamping clip 2015 to rotate. When the clamping clip 2015 touches the mounting head 2006, it engages with the clamping groove 2010 on the mounting head 2006. The rotating shaft 2013 drives the rotating rod 2014 and the clamping clip 2015 to move downward, so that the clamping clip 2015 separates the first tool bit 2011 and the second tool bit 2012 from the tool holder 2004. When the second tool bit 2012 rotates to the lower part of the tool holder 2004 following the clamping clip 2015, the rotating shaft 2013 drives the rotating rod 2014 and the clamping clip 2015 to move upward, so that the second tool bit 2012 is installed into the tool holder 2004. When the clamping ball 2009 contacts the fixed collar 2005, the fixed collar 2005 will squeeze the clamping ball 2009, and the clamping ball 2009 squeezes the spring 2008 inward, and the spring 2008 is compressed.When the engaging ball 2009 passes through the fixed ring opening 2005, the spring 2008 rebounds and pushes the engaging ball 2009 to engage with the fixed ring opening 2005, so that the first cutter head 2011 and the second cutter head 2012 can be fixed in the cutter holder 2004, thus achieving the purpose of replacing the cutter head.

[0026] Further, there are two sets of engaging balls 2009 provided on the outer surface of the spring 2008, and two sets of clamping clips 2015 are provided on the outer surface of the rotating rod 2014. By providing the engaging balls 2009 and the clamping clips 2015, during use, the spring 2008 rebounds and pushes the engaging balls 2009 to engage with the fixed ring opening 2005, enabling the first cutter head 2011 and the second cutter head 2012 to be fixed in the cutter holder 2004. The clamping clips 2015 engage with the clamping grooves 2010 on the mounting head 2006, thereby stably clamping the first cutter head 2011 and the second cutter head 2012.

[0027] Further, the lifting mechanism 3 includes a rear column 301, a first motor 302, a first threaded rod 303, a special-shaped slider 304, a first threaded hole 305, and a rear bracket 306. The upper surface of the moving table 2 is fixedly connected to the rear column 301. The upper surface of the rear column 301 is fixedly connected to the first motor 302. The lower surface of the first motor 302 is fixedly connected to the first threaded rod 303. The outer surface of the rear column 301 is slidably connected to the special-shaped slider 304. The outer surface of the special-shaped slider 304 is provided with a first threaded hole 305. The outer surface of the special-shaped slider 304 is fixedly connected to the rear bracket 306. By providing the rear column 301, the first motor 302, the first threaded rod 303, the special-shaped slider 304, the first threaded hole 305, and the rear bracket 306, during use, the first motor 302 drives the first threaded rod 303 to rotate, so that the special-shaped slider 304 can move up and down along the column 301. The special-shaped slider 304 simultaneously drives the rear bracket 306 to move up and down, thereby changing the height of the rear bracket 306, better supporting the workpiece, and preventing the workpiece from bending or deforming due to gravity.

[0028] Further, the outer wall surface dimension of the rear column 301 matches the inner wall surface dimension of the special-shaped slider 304, and the outer wall surface dimension of the first threaded rod 303 matches the inner surface dimension of the first threaded hole 305. By providing the rear column 301 and the first threaded rod 303, during use, the rotation of the first threaded rod 303 provides power for the special-shaped slider 304, and the rear column 301 restricts the movement trajectory of the special-shaped slider 304, enabling the special-shaped slider 304 to only move up and down along the rear column 301.

[0029] Further, the positioning mechanism 11 includes a limiting strip 1101, a lead screw 1102, a hand wheel 1103, an upper sliding seat 1104, a limiting block 1105, a lead screw groove 1106, a servo motor 1107, a screw rod 1108, a gear disk 1109, a workbench 1110, and a T-shaped groove 1111. The upper surface of the lower sliding seat 10 is fixedly connected with the limiting strip 1101, the upper surface of the lower sliding seat 10 is fixedly connected with the lead screw 1102, one side surface of the lead screw 1102 is fixedly connected with the hand wheel 1103, the outer surface of the lead screw 1102 is slidably connected with the upper sliding seat 1104, the outer surface of the upper sliding seat 1104 is fixedly connected with the limiting block 1105, the outer surface of the upper sliding seat 1104 is provided with the lead screw groove 1106, the upper surface of the upper sliding seat 1104 is fixedly connected with the servo motor 1107, one side surface of the servo motor 1107 is fixedly connected with the screw rod 1108, the outer surface of the screw rod 1108 is meshed with the gear disk 1109, the upper surface of the gear disk 1109 is fixedly connected with the workbench 1110, and the upper surface of the workbench 1110 is provided with the T-shaped groove 1111. Through the settings of the limiting strip 1101, the lead screw 1102, the hand wheel 1103, the upper sliding seat 1104, the limiting block 1105, the lead screw groove 1106, the servo motor 1107, the screw rod 1108, the gear disk 1109, the workbench 1110, and the T-shaped groove 1111, during use, when the hand wheel 1103 is rotated, the hand wheel 1103 drives the lead screw 1102 to rotate, causing the upper sliding seat 1104 to move along the limiting strip 1101. When the limiting block 1105 touches the end of the limiting strip 1101, it will be blocked by the limiting strip 1101, so that the upper sliding seat 1104 will not fall off the lower sliding seat 10. When the servo motor 1107 is started, the servo motor 1107 drives the screw rod 1108 to rotate, the screw rod 1108 drives the gear disk 1109 to rotate, and the gear disk 1109 drives the workbench 1110 to rotate, thereby changing the angle of the workbench 1110.

[0030] Further, two groups of limiting strips 1101 are provided on the upper surface of the lower sliding seat 10, and the outer wall surface size of the lead screw 1102 is consistent with the inner wall surface size of the lead screw groove 1106. Through the settings of the limiting strip 1101 and the lead screw 1102, during use, the rotation of the lead screw 1102 provides power for the movement of the upper sliding seat 1104, and the limiting strip 1101 restricts the movement trajectory of the upper sliding seat 1104.

[0031] Further, the workbench 1110 and the upper sliding seat 1104 form a rotating structure through the gear disk 1109, and multiple groups of T-shaped grooves 1111 are provided on the upper surface of the workbench 1110. Through the settings of the workbench 1110 and the T-shaped groove 1111, during use, the T-shaped groove 1111 can not only effectively fix the workpiece, ensure the stability and precision of the processing process, but also help to clean the generated waste chips during the processing process, maintaining the cleanliness and tidiness of the workbench surface.

[0032] Furthermore, the inner wall surface dimensions of the sliding groove 13 match the outer wall surface dimensions of the slider 14, and the inner wall surface dimensions of the second threaded hole 16 match the outer wall surface dimensions of the second threaded rod 19. Through the settings of the sliding groove 13 and the second threaded rod 19, during use, the second motor 18 drives the second threaded rod 19 to rotate, providing power for the movement of the slider 14. The sliding groove 13 restricts the movement trajectory of the slider 14 and makes the movement of the slider 14 more stable.

[0033] Working principle: Start the drive motor 4. The drive motor 4 drives the conveyor belt 5 to rotate. The conveyor belt 5 drives the conveyor rod 6 to rotate, thereby causing the toothed belt 7 to move. The toothed plate 9 moves along with the toothed belt 7, driving the lower slide 10 to move together, so that the lower slide 10 can move on the bed body 1. Rotate the handwheel 1103. The handwheel 1103 drives the lead screw 1102 to rotate, causing the upper slide 1104 to move along the limit bar 1101. When the limit block 1105 touches the end of the limit bar 1101, it will be blocked by the limit bar 1101, so that the upper slide 1104 will not fall off the lower slide 10. Start the servo motor 1107. The servo motor 1107 drives the screw 1108 to rotate. The screw 1108 drives the gear disk 1109 to rotate. The gear disk 1109 drives the workbench 1110 to rotate, thereby changing the angle of the workbench 1110. The first motor 302 drives the first threaded rod 303 to rotate, so that the special-shaped slider 304 can move up and down along the column 301. The special-shaped slider 304 simultaneously drives the rear support 306 to move up and down, thereby changing the height of the rear support 306 to better support the workpiece and prevent the workpiece from bending or deforming due to gravity. The spindle box 15 drives the spindle 2001 to rotate. The spindle 2001 drives the faceplate 2002 to rotate, so that the first tool bit 2011 can bore a hole on the air shaft. When the first tool bit 2011 needs to be replaced, the spindle box 15 drives the rotating shaft 2013 to rotate. The rotating shaft 2013 drives the rotating rod 2014 and the clamping clip 2015 to rotate. When the clamping clip 2015 touches the mounting head 2006, it engages with the clamping groove 2010 on the mounting head 2006. The rotating shaft 2013 drives the rotating rod 2014 and the clamping clip 2015 to move downward, so that the clamping clip 2015 separates the first tool bit 2011 and the second tool bit 2012 from the tool holder 2004. When the clamping clip 2015 drives the second tool bit 2012 to rotate to the lower part of the tool holder 2004, the rotating shaft 2013 drives the rotating rod 2014 and the clamping clip 2015 to move upward, so that the second tool bit 2012 is installed into the tool holder 2004. When the engaging ball 2009 touches the fixed ring opening 2005, the fixed ring opening 2005 will squeeze the engaging ball 2009. The engaging ball 2009 squeezes the spring 2008 inward, and the spring 2008 compresses. When the engaging ball 2009 passes through the fixed ring opening 2005, the spring 2008 rebounds, pushing the engaging ball 2009 to engage with the fixed ring opening 2005, so that the first tool bit 2011 and the second tool bit 2012 can be fixed in the tool holder 2004, achieving the purpose of replacing the tool bit, and solving the problem that when in use, it is necessary to replace the boring tool bit according to the specific requirements of different equipment. The behavior of frequently replacing the tool bit not only increases the operation complexity, but also when replacing, the operator is easily exposed to the sharp blade, posing a high safety risk and being unfavorable for ensuring the operation safety, and is not convenient and safe enough in actual operation.

[0034] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An air inflation shaft sleeve boring device, comprising a bed body (1), characterized in that: A moving table (2) is slidably connected to the upper surface of the bed body (1). An elevating mechanism (3) is arranged on the upper surface of the moving table (2). A driving motor (4) is fixedly connected to the inner surface of the bed body (1). A conveyor belt (5) is rotatably connected to the outer surface of the driving motor (4). A conveyor rod (6) is rotatably connected to the inner surface of the conveyor belt (5). A toothed belt (7) is rotatably connected to the outer surface of the conveyor rod (6). A blocking strip (8) is fixedly connected to the inner surface of the bed body (1). A toothed plate (9) is engaged with the upper surface of the toothed belt (7). A downward sliding seat (10) is fixedly connected to the upper surface of the toothed plate (9). A positioning mechanism (11) is arranged on the upper surface of the downward sliding seat (10). A front column (12) is fixedly connected to the upper surface of the bed body (1). A chute (13) is formed in the outer surface of the front column (12). A slider (14) is slidably connected to the outer surface of the chute (13). A main spindle box (15) is fixedly connected to the outer surface of the slider (14). A second threaded hole (16) is formed in the outer surface of the slider (14). An electric push rod (17) is fixedly connected to one side surface of the main spindle box (15). A second motor (18) is fixedly connected to the upper surface of the front column (12). A second threaded rod (19) is fixedly connected to the lower surface of the second motor (18). A tool changing mechanism (20) is arranged on the outer surface of the main spindle box (15); The tool changing mechanism (20) includes a main shaft (2001), a faceplate (2002), a hinge (2003), a tool holder (2004), a fixed collar (2005), a mounting head (2006), a movable groove (2007), a spring (2008), a engaging ball (2009), a clamping groove (2010), a first cutting tool head (2011), a second cutting tool head (2012), a rotating shaft (2013), a rotating rod (2014) and a clamping clip (2015). The inner surface of the main spindle box (15) is fixedly connected with the main shaft (2001). One side surface of the main shaft (2001) is fixedly connected with the faceplate (2002). The outer surface of the faceplate (2002) is fixedly connected with the hinge (2003). The outer surface of the hinge (2003) is fixedly connected with the tool holder (2004). The inner surface of the tool holder (2004) is fixedly connected with the fixed collar (2005). The inner surface of the tool holder (2004) is slidably connected with the mounting head (2006). The inner surface of the mounting head (2006) is provided with the movable groove (2007). The inner surface of the movable groove (2007) is slidably connected with the spring (2008). One side surface of the spring (2008) is fixedly connected with the engaging ball (2009). The outer surface of the mounting head (2006) is provided with the clamping groove (2010). The lower surface of the mounting head (2006) is fixedly connected with the first cutting tool head (2011). The lower surface of the mounting head (2006) is fixedly connected with the second cutting tool head (2012). The outer surface of the main spindle box (15) is fixedly connected with the rotating shaft (2013). The outer surface of the rotating shaft (2013) is rotatably connected with the rotating rod (2014). One side surface of the rotating rod (2014) is fixedly connected with the clamping clip (2015).

2. The boring device for an air shaft sleeve according to claim 1, characterized in that: There are two groups of the engaging balls (2009) arranged on the outer surface of the spring (2008). There are two groups of the clamping clips (2015) arranged on the outer surface of the rotating rod (2014).

3. The boring device for an air shaft sleeve according to claim 1, wherein: The lifting mechanism (3) includes a rear column (301), a first motor (302), a first threaded rod (303), a special-shaped slider (304), a first threaded hole (305), and a rear bracket (306). The upper surface of the moving table (2) is fixedly connected with the rear column (301). The upper surface of the rear column (301) is fixedly connected with the first motor (302). The lower surface of the first motor (302) is fixedly connected with the first threaded rod (303). The outer surface of the rear column (301) is slidably connected with the special-shaped slider (304). The outer surface of the special-shaped slider (304) is provided with the first threaded hole (305). The outer surface of the special-shaped slider (304) is fixedly connected with the rear bracket (306).

4. The boring device for an air shaft sleeve according to claim 3, characterized in that: The outer wall surface dimensions of the rear column (301) match the inner wall surface dimensions of the special-shaped slider (304), and the outer wall surface dimensions of the first threaded rod (303) match the inner surface dimensions of the first threaded hole (305).

5. The boring device for an air shaft sleeve according to claim 1, characterized in that: The positioning mechanism (11) includes a limit strip (1101), a lead screw (1102), a handwheel (1103), an upper sliding seat (1104), a limit block (1105), a lead screw groove (1106), a servo motor (1107), a screw (1108), a gear disk (1109), a workbench (1110), and a T-shaped groove (1111). A limit strip (1101) is fixedly connected to the upper surface of the lower sliding seat (10), a lead screw (1102) is fixedly connected to the upper surface of the lower sliding seat (10), a handwheel (1103) is fixedly connected to one side surface of the lead screw (1102), an upper sliding seat (1104) is slidably connected to the outer surface of the lead screw (1102), a limit block (1105) is fixedly connected to the outer surface of the upper sliding seat (1104), a lead screw groove (1106) is formed in the outer surface of the upper sliding seat (1104), a servo motor (1107) is fixedly connected to the upper surface of the upper sliding seat (1104), a screw (1108) is fixedly connected to one side surface of the servo motor (1107), a gear disk (1109) is engaged with the outer surface of the screw (1108), a workbench (1110) is fixedly connected to the upper surface of the gear disk (1109), and a T-shaped groove (1111) is formed in the upper surface of the workbench (1110).

6. The boring device for an air shaft sleeve according to claim 5, characterized in that: Two groups of limit strips (1101) are provided on the upper surface of the lower sliding seat (10), and the outer wall surface dimensions of the lead screw (1102) match the inner wall surface dimensions of the lead screw groove (1106).

7. The boring device for an air shaft sleeve according to claim 5, wherein: The workbench (1110) and the upper sliding seat (1104) form a rotating structure through the gear disk (1109), and multiple groups of T-shaped grooves (1111) are provided on the upper surface of the workbench (1110).

8. The boring device for an air shaft sleeve according to claim 1, wherein: The inner wall surface dimensions of the chute (13) match the outer wall surface dimensions of the slider (14), and the inner wall surface dimensions of the second threaded hole (16) match the outer wall surface dimensions of the second threaded rod (19).

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