Spindle combination structure

Abstract

The present invention relates to a spindle assembly structure, which comprises: a body pivotally provided with a rotating shaft, and an outer peripheral surface portion of the rotating shaft is in the shape of an external thread; a floating seat is fixedly assembled on the body, and the floating seat is provided with a first pivot portion and a first fitting portion; a precision nut has a first screwing portion and a second fitting portion; a tool clamping air blowing ring is provided with a first air passage; a spacer ring is provided with a second pivot portion and a second air passage; an oil cylinder seat is provided with a third pivot portion; a tool clamping piston is provided with a fourth pivot portion and at least one third air passage; an oil cylinder seat cover is provided with a fifth pivot portion and a fourth air passage.

Description

Technical Field

[0001] The present invention relates to a spindle assembly structure, and more particularly to a spindle assembly structure in which a gasket is provided with at least one second air passage, and excess gas entering the third air passage can be discharged out of the spindle assembly structure through the second air passage, so that the probability of damage caused by the gas entering the spindle assembly structure is relatively low. Background Art

[0002] As previously known, a common spindle structure, such as the spindle structure disclosed in Taiwan Patent Application No. 090220570, Certificate No. 216558, Patent Title: Tool Machine Direct Coupling Type Spindle Unclamping Mechanism, has the following structure: A spindle 1, the inner hole wall above the spindle 1 is indirectly connected to a coupling 11 and is mounted on the outer ring of the rotating shaft of a motor 12; An unclamping oil cylinder module, sleeved on the outer ring of the spindle 1, the unclamping oil cylinder module includes: An unclamping oil cylinder 2; A spindle sleeve 21; An oil cylinder cover 22, on the outside of the oil cylinder cover 22, there is a clamping air pressure joint 221, an unclamping oil pressure joint 222 and a blowing joint 223, the clamping air pressure joint 221 and the unclamping oil pressure joint 222 are connected to an unclamping oil pressure channel 224 and a clamping air pressure channel 225 provided inside the oil cylinder cover 22; An unclamping oil cylinder piston 23, sleeved inside the oil cylinder cover 22, and inside the unclamping oil cylinder piston 23, there is another blowing channel 231, the blowing channel 231 is connected to the blowing joint 223; A floating unclamping reverse locking seat 24, on the seat body of the floating unclamping reverse locking seat 24, there are several braking intervals 241, the seat body is locked to the spindle combined sleeve 21 by a guiding bolt 242 and a nut 243, and inside the guiding bolt 242, there is a compression spring 245 sleeved; A reverse locking nut 25, screwed onto the spindle 1 and engaged with the floating unclamping reverse locking seat 24; A tool clamping amount adjusting gasket 26, placed between the floating unclamping reverse locking seat 24 and the unclamping oil cylinder 2; A pull rod 3, placed inside the spindle 1, continuing the establishment and transmission of the unclamping force of the blowing channel 42 of the conical pressure-bearing ring block 41, and the lower end of the pull rod 3 can be locked to a tool 5; A pressure-bearing component mechanism 4, includes: Two conical pressure-bearing ring blocks 41, inside the two conical pressure-bearing ring blocks 41, there is a blowing channel 42 that can communicate with each conical pressure-bearing ring block 41; Fixing screws 45, used to lock the lower pressure ring 46, and at the same time can also lock the two conical pressure-bearing ring blocks 41 to the pull rod 3; An upper pressure ring 44, cooperating with the conical guiding part 43 at the upper part of the conical pressure-bearing ring block 41; A lower pressure ring 46, locked to the lower part of the two conical pressure-bearing ring blocks 41 by fixing screws 45; A locking nut 47, provided for screwing the locking nut 47 onto the pull rod 3 and locking the upper pressure ring 44, the two conical pressure-bearing ring blocks 41 and the lower pressure ring 46; The unclamping oil cylinder module is sleeved on the outer ring of the spindle 1, inside which there is a blowing channel 231, when the unclamping oil cylinder piston 23 unclamps, it connects with the conical pressure-bearing ring block 41 to establish a blowing channel 42 and transmit the unclamping force; The two conical pressure-bearing ring blocks 41 of the pressure-bearing component mechanism 4 are tightly combined with the outer ring of the pull rod 3 by a circular male-female taper method and are exposed outside the outer ring of the spindle 1, serving as the interface for establishing a blowing channel 231 and transmitting the unclamping force between the pull rod 3 and the unclamping oil cylinder piston 23 during unclamping. Through the above combination, the unclamping force required for the direct coupling type spindle 1 can be quickly provided, the tool shank and the spindle 1 can be cleaned with air, and the length of the spindle 1 increased due to the setting of the blowing channel 231 for unclamping can be shortened, so as to reduce the vibration caused by the spindle 1 at high speed and increase the rotational speed of the spindle 1.

[0003] However, the disadvantage of this common tool machine direct-coupled spindle tool release mechanism is that:

[0004] Please supplement with Figure 1 As shown, in the tool release mechanism of the tool machine direct-coupled spindle, there is no hole for discharging the excess gas in the air blowing channel 231. Usually, this gas contains water vapor. Especially in Taiwan, China, the air humidity is quite high. The probability of damage caused by the remaining gas in the spindle structure is greatly increased.

[0005] In view of the disadvantages of the above common structure, the inventor, by virtue of years of experience in manufacturing, production and design in the relevant industry, finally has a product of a spindle structure that can solve the common drawbacks. Summary of the Invention

[0006] The main object of the present invention is to provide a spindle assembly structure, in which the excess gas entering the third air passage can be discharged out of the spindle assembly structure through the second air passage, and the probability of damage caused by entering the spindle assembly structure is relatively low.

[0007] To achieve the above object, a spindle assembly structure of the present invention is characterized in that it includes:

[0008] A body, a rotating shaft is pivotally provided in the body, and an outer peripheral surface portion of the rotating shaft is in an external thread shape;

[0009] A floating seat, which is locked and assembled on the body. The floating seat is provided with a first pivot portion for the rotating shaft to pass through, and the floating seat is provided with a first fitting portion;

[0010] A precision nut, which is assembled at one end of the floating seat. The precision nut has a first screwing portion, which is screwed and locked on the rotating shaft. The first screwing portion is in an internal thread shape. The precision nut rotates with the rotating shaft. The precision nut is provided with a second fitting portion, which is oppositely and fittingly sleeved with the first fitting portion. There is a gap between the second fitting portion and the first fitting portion, and the gap between the second fitting portion and the first fitting portion is in a meandering path shape;

[0011] A tool release air blowing ring, which is assembled on the rotating shaft. The tool release air blowing ring rotates rapidly with the rotating shaft. The tool release air blowing ring is provided with a first air passage;

[0012] A spacer ring, which is assembled with the floating seat. The spacer ring is provided with a second pivot portion for accommodating the precision nut. The spacer ring is provided with a second air passage, and the second air passage is in communication with the second pivot portion and the outside of the spacer ring;

[0013] An oil cylinder seat is arranged adjacent to the gasket ring. The oil cylinder seat is provided with a third pivot portion through which the rotating shaft extends.

[0014] A tool clamping piston is assembled with the rotating shaft and the oil cylinder seat. Part of the tool clamping piston is accommodated in the third pivot portion, and the tool clamping piston linearly displaces within the third pivot portion. The tool clamping piston is provided with a fourth pivot portion through which the rotating shaft extends. The fourth pivot portion is in the shape of a circular through groove. The tool clamping piston is provided with at least one third air passage which is in communication with the fourth pivot portion. One end of the third air passage is aligned with the first air passage. When the tool clamping piston displaces, the third air passage approaches or moves away from the first air passage. The third air passage is slightly in the shape of an L-shaped through hole. When there are multiple third air passages, they are arranged in a ring shape. A fifth end face is provided within the fourth pivot portion and is aligned with the tool clamping air blowing ring. The fifth end face is flat. One end of the third air passage opens at the fifth end face. When the tool clamping piston displaces, the fifth end face approaches or moves away from the tool clamping air blowing ring. The tool clamping air blowing ring is accommodated within the fourth pivot portion.

[0015] An oil cylinder seat cover is assembled with the oil cylinder seat. The oil cylinder seat cover is provided with a fifth pivot portion for accommodating one end of the tool clamping piston. Part of the tool clamping piston protrudes outside the fifth pivot portion. Restricted by the oil cylinder seat cover, the tool clamping piston does not protrude outside the oil cylinder seat cover. The oil cylinder seat cover is provided with a fourth air passage. When the tool clamping piston displaces, one end of the fourth air passage is aligned or not aligned with the third air passage.

[0016] When the tool clamping piston does not displace, there is a gap between the tool clamping piston and the tool clamping air blowing ring, and the third air passage is not aligned with the fourth air passage. After the tool clamping piston displaces, the tool clamping piston approaches the tool clamping air blowing ring, and the third air passage is aligned with the fourth air passage.

[0017] The main function of the present invention is that the excess gas entering the third air passage can be discharged outside the main shaft assembly structure through the second air passage, and the probability of the gas in the third air passage entering the main shaft assembly structure and causing damage is relatively low. A tortuous path is formed between the first engaging portion and the second engaging portion, and the cross-sectional area of this tortuous path is much smaller than that of the second air passage. Most of the gas will almost be discharged through the second air passage, thereby reducing the probability of the gas entering the second air passage. Description of the Drawings

[0018] Figure 1 It is an exploded perspective view of the main shaft assembly structure of the present invention.

[0019] Figure 2 It is a perspective view of the floating seat of the main shaft assembly structure of the present invention.

[0020] Figure 3It is a perspective view of the precision nut of the spindle combination structure of the present invention.

[0021] Figure 4 It is a perspective view of the tool clamping piston of the spindle combination structure of the present invention.

[0022] Figure 5 It is a perspective combined view of the spindle combination structure of the present invention.

[0023] Figure 6 It is a side view of the spindle combination structure of the present invention.

[0024] Figure 7 It is the present invention Figure 6 A sectional view taken along line A-A.

[0025] Figure 8 It is the present invention Figure 7 An enlarged view at position B.

[0026] Figure 9 It is the present invention Figure 7 An enlarged view at position C.

[0027] Figure 10 It is a sectional view of the second operating state of the present invention.

[0028] Figure 11 It is the present invention Figure 10 An enlarged view at position C.

[0029] Figure 12 It is the present invention Figure 10 An enlarged view at position D. Detailed implementation manners

[0030] First, please refer to Figures 1 to 12 as shown, Figure 1 It is an exploded perspective view of the spindle combination structure of the present invention, Figure 2 It is a perspective view of the floating seat 20 of the spindle combination structure of the present invention, Figure 3 It is a perspective view of the precision nut 30 of the spindle combination structure of the present invention, Figure 4 It is a perspective view of the tool clamping piston 70 of the spindle combination structure of the present invention, Figure 5 It is a perspective combined view of the spindle combination structure of the present invention, Figure 6 It is a side view of the spindle combination structure of the present invention, Figure 7 It is the present invention Figure 6 A sectional view taken along line A-A, Figure 8 It is the present invention Figure 7 An enlarged view at position B, Figure 9 It is the present invention Figure 7 An enlarged view at position C, Figure 10 It is a sectional view of the second operating state of the present invention, Figure 11 It is the present invention Figure 10 An enlarged view at position C,Figure 12 is an enlarged view of the D part of the present invention Figure 10 The present invention relates to a spindle assembly structure, which includes:

[0031] A body 10 is assembled on various machine tools or various machining mother machines. A rotating shaft 11 is pivotally arranged in the body 10. The rotating shaft 11 is in the shape of a round rod and rotates rapidly. At least one set of bearing parts is arranged between the rotating shaft 11 and the body 10. One end of the rotating shaft 11 is for assembling various cutting tools, and the outer peripheral part of the other end of the rotating shaft 11 is in the shape of an external thread;

[0032] A floating seat 20, please refer to Figure 2 and Figure 7 As shown, the floating seat 20 is locked and assembled on the body 10. A part of the floating seat 20 has a gap with the body 10. The floating seat 20 is provided with a first pivot part 21 which is in the shape of a round through groove and for the rotating shaft 11 to pass through. The floating seat 20 is provided with a first fitting part 22 which is in the shape of a convex ring body. The first fitting part 22 is sequentially provided with a first end face 221 and a second end face 222 from the axis to the outside. The first end face 221 and the second end face 222 are flat and parallel to each other. The floating seat 20 is provided with a plurality of screw holes 23 which are in the shape of internal threads. The plurality of screw holes 23 are arranged in a spaced annular shape with the first pivot part 21 as the axis;

[0033] A precision nut 30, please refer to Figure 3 As shown, the precision nut 30 is assembled at one end of the floating seat 20. The precision nut 30 has a first screwing part 31 which is screwed and locked on the rotating shaft 11. The first screwing part 31 is in the shape of internal threads. The precision nut 30 rotates with the rotating shaft 11. The precision nut 30 is provided with a second fitting part 32 which is oppositely and fittingly sleeved with the first fitting part 22. There is a gap between the second fitting part 32 and the first fitting part 22. The gap between the second fitting part 32 and the first fitting part 22 is in a meandering path shape. The second fitting part 32 is in the shape of a ring groove. The second fitting part 32 is sequentially provided with a third end face 321 and a fourth end face 322 from the axis to the outside. The third end face 321 and the fourth end face 322 are flat and parallel to each other. The third end face 321 is opposite to the first end face 221, and the fourth end face 322 is opposite to the second end face 222;

[0034] A tool clamping air blowing ring 40 is assembled on the rotating shaft 11. The tool clamping air blowing ring 40 rotates rapidly with the rotating shaft 11. The tool clamping air blowing ring 40 is provided with a first air passage 401;

[0035] A fixed rod 41 is assembled with the rotating shaft 11 and the tool striking air blowing ring 40. The fixed rod 41 rotates rapidly with the rotating shaft 11. The fixed rod 41 is directly fixed on the rotating shaft 11, so that the tool striking air blowing ring 40 is fixed on the rotating shaft 11. The fixed rod 41 has a gas flow channel. The first air duct 401 and the gas flow channel are communicated with the inside of the rotating shaft 11 to provide air blowing;

[0036] A spacer ring 50 is assembled with the floating seat 20. The spacer ring 50 is in the shape of a circular ring body. The spacer ring 50 is provided with a second pivot part 51 for accommodating the precision nut 30. The second pivot part 51 is in the shape of a circular through groove. The spacer ring 50 is provided with a second air duct 52. The second air duct 52 is communicated with the second pivot part 51 and the outside of the spacer ring 50. The second air duct 52 is in the shape of a circular through hole. The axis of the second air duct 52 is perpendicular to the axis of the second pivot part 51. The spacer ring 50 is provided with a plurality of first fixing parts 53. Each first fixing part 53 is aligned with each screw hole 23. The number of the plurality of first fixing parts 53 matches the number of the plurality of screw holes 23. The first fixing part 53 is in the shape of a circular through hole. The plurality of first fixing parts 53 are arranged in a spaced annular shape with the second pivot part 51 as the axis;

[0037] An oil cylinder seat 60 is in the shape of a circular body. The oil cylinder seat 60 is abutted against the spacer ring 50. The oil cylinder seat 60 is provided with a third pivot part 61 through which the rotating shaft 11 passes. The third pivot part 61 is in the shape of a circular through groove. The oil cylinder seat 60 is provided with a plurality of second fixing parts 62. Each second fixing part 62 is aligned with each first fixing part 53. The second fixing part 62 is in the shape of a circular through hole. The plurality of second fixing parts 62 are arranged in a spaced annular shape with the third pivot part 61 as the axis;

[0038] A tool striking piston 70, please supplement with Figure 4As shown, it can be clearly seen from the figure that the tool clamping piston 70 is assembled with the rotating shaft 11 and the oil cylinder base 60. Part of the tool clamping piston 70 is accommodated in the third pivot part 61. The tool clamping piston 70 can linearly displace within the third pivot part 61. The tool clamping piston 70 is provided with a fourth pivot part 71 through which the rotating shaft 11 penetrates. The fourth pivot part 71 is in the shape of a circular through groove. The tool clamping piston 70 is provided with at least one third air passage 72 which is in communication with the fourth pivot part 71. One end of the third air passage 72 is aligned with the first air passage 401. When the tool clamping piston 70 displaces, the third air passage 72 approaches or moves away from the first air passage 401. The third air passage 72 is slightly in the shape of an L-shaped perforation. When there are multiple third air passages 72, they are arranged in a ring shape. A fifth end face 73 is provided within the fourth pivot part 71, which is aligned with the tool clamping air blowing ring 40. The fifth end face 73 is flat. One end of the third air passage 71 opens at the fifth end face 73. When the tool clamping piston 70 displaces, the fifth end face 73 approaches or moves away from the tool clamping air blowing ring 40. The tool clamping air blowing ring 40 is accommodated within the fourth pivot part 71;

[0039] Generally, there are other mechanisms provided near the main shaft assembly structure to displace the tool clamping piston 70;

[0040] An oil cylinder base cover 80 is assembled with the oil cylinder base 60. The oil cylinder base cover 80 is provided with a fifth pivot part 81 through which one end of the tool clamping piston 70 is accommodated. Part of the tool clamping piston 70 protrudes outside the fifth pivot part 81. Restricted by the oil cylinder base cover 80, the tool clamping piston 70 does not protrude outside the oil cylinder base cover 80. The fifth pivot part 81 is in the shape of a circular through groove. The oil cylinder base cover 80 is provided with a fourth air passage 82. When the tool clamping piston 70 displaces, one end of the fourth air passage 82 is aligned or not aligned with the third air passage 72. The fourth air passage 82 is slightly in the shape of an L-shaped perforation. The other end of the fourth air passage 82 is connected to a gas source. The oil cylinder base cover 80 is provided with a plurality of third fixing parts 83, and each third fixing part 83 is aligned with each second fixing part 62. The third fixing part 83 is in the shape of a circular perforation. The number of the plurality of third fixing parts 83 matches the number of the plurality of second fixing parts 62;

[0041] When the tool clamping piston 70 is not displaced, there is a gap between the tool clamping piston 70 and the tool clamping air blowing ring 40, and the third air passage 72 is not aligned with the fourth air passage 82. After the tool clamping piston 70 displaces, the tool clamping piston 70 approaches the tool clamping air blowing ring 40, and the third air passage 72 is aligned with the fourth air passage 82;

[0042] A plurality of fixing members 84, the ends of the fixing members 84 are externally threaded, and the fixing members 84 are inserted through the third fixing portion 83, the second fixing portion 62 and the first fixing portion 53 and screwed into the screw hole 23, so that the floating seat 20, the gasket ring 50, the oil cylinder seat 60 and the oil cylinder seat cover 80 are sequentially assembled.

[0043] Please refer to Figure 5 As shown, the floating seat 20 is assembled with the body 10, the precision nut 30 is screwed onto the rotating shaft 11, the fixing rod 41 is inserted through the rotating shaft 11, so that the tool change blowing ring 40 is assembled with the rotating shaft 11, a part of the tool change piston 70 is hidden in the oil cylinder seat 60, and the fixing member 84 assembles the floating seat 20, the gasket ring 50, the oil cylinder seat 60 and the oil cylinder seat cover 80.

[0044] Please supplement with Figures 6 to 9 As can be clearly seen from the figure, when the tool change piston 70 is not displaced, there is a gap between the tool change piston 70 and the tool change blowing ring 40, the fourth air passage 82 and the third air passage 72 are not aligned, and the gas provided by the gas source cannot enter the third air passage 72 from the fourth air passage 82.

[0045] Please supplement with Figures 10 to 12 Displace the tool change piston 70 so that the fourth air passage 82 and the third air passage 72 are aligned, the tool change piston 70 is close to the tool change blowing ring 40, the other end of the third air passage 72 is close to the first air passage 401, and the gas enters the first air passage 401 from the fourth air passage 82 through the third air passage 72, and then enters the rotating shaft 11 from the first air passage 401. The space between the third air passage 72 and the first air passage 401 of the tool change blowing ring 40 cannot be completely sealed, and the excess gas can be discharged outside the main shaft combination structure through the second air passage 52. A small part of the gas may enter the floating seat 20 through the gap between the first fitting portion 22 and the second fitting portion 32.

[0046] In another embodiment of the present invention, there are a plurality of the second air passages 52, and the plurality of second air passages 52 are arranged in a ring shape around the axis of the gasket ring 50. The tool change blowing ring 40 is provided with a first ring groove, the first ring groove is in communication with the first air passage 401, the gas at the third air passage 73 enters the first ring groove and then enters the first air passage 401. There are a plurality of the third air passages 73, the tool change piston 70 is provided with a second ring groove, the second ring groove is in communication with the plurality of third air passages 73, and the gas at the fourth air passage 82 enters the second ring groove and then enters the plurality of third air passages 73.

[0047] The advantages of the main shaft combination structure of the present invention are as follows:

[0048] 1. The excess gas entering the third air duct 72 can be discharged outside the main shaft assembly structure through the second air duct 52, and the probability of the gas in the third air duct 72 entering the main shaft assembly structure and causing damage is relatively low.

[0049] 2. A tortuous path is formed between the first fitting portion 22 and the second fitting portion 32. The cross-sectional area of this tortuous path is much smaller than that of the second air duct 52. Most of the gas will almost be discharged through the second air duct 52, that is, the probability of the gas in the second air duct 72 entering the interior of the body 10 is reduced.

[0050] 3. A tortuous path is formed between the first fitting portion 22 and the second fitting portion 32. A smaller portion of the gas has to bypass the tortuous path formed between the first fitting portion 22 and the second fitting portion 32 before it can enter the floating seat 20, and the probability of the gas entering the interior of the main shaft assembly structure will be even lower.

[0051] Therefore, the main shaft assembly structure of the present invention has industrial applicability, novelty and progressiveness, and can truly meet the application requirements of an invention patent, and an application is filed according to law.

Claims

1. A spindle combination structure, characterized in that: It includes: A body, within which a rotating shaft is pivotally provided, and an outer peripheral surface portion of the rotating shaft is in the shape of an external thread; A floating seat, which is locked and assembled on the body. The floating seat is provided with a first pivotal portion through which the rotating shaft penetrates, and the floating seat is provided with a first fitting portion; A precision nut, which is assembled at one end of the floating seat. The precision nut has a first screwing portion, which is screwed and locked on the rotating shaft. The first screwing portion is in the shape of an internal thread. The precision nut rotates with the rotating shaft. The precision nut is provided with a second fitting portion, which is oppositely and fittingly sleeved with the first fitting portion. There is a gap between the second fitting portion and the first fitting portion, and the gap between the second fitting portion and the first fitting portion is in a circuitous path shape; A tool changing air blowing ring, which is assembled on the rotating shaft. The tool changing air blowing ring rotates rapidly with the rotating shaft, and the tool changing air blowing ring is provided with a first air passage; A spacer ring, which is assembled with the floating seat. The spacer ring is provided with a second pivotal portion for accommodating the precision nut, and the spacer ring is provided with a second air passage, which is in communication with the second pivotal portion and the outside of the spacer ring; An oil cylinder seat, which is abutted against the spacer ring. The oil cylinder seat is provided with a third pivotal portion through which the rotating shaft penetrates; A tool changing piston, which is assembled with the rotating shaft and the oil cylinder seat. A part of the tool changing piston is accommodated in the third pivotal portion, and the tool changing piston linearly displaces within the third pivotal portion. The tool changing piston is provided with a fourth pivotal portion through which the rotating shaft penetrates. The fourth pivotal portion is in the shape of a circular through groove. The tool changing piston is provided with at least one third air passage, which is in communication with the fourth pivotal portion. One end of the third air passage is oppositely aligned with the first air passage. When the tool changing piston displaces, the third air passage approaches or moves away from the first air passage. The third air passage is slightly in the shape of an L-shaped through hole. When there are multiple third air passages, the third air passages are arranged in a ring shape. A fifth end face is provided within the fourth pivotal portion, which is oppositely aligned with the tool changing air blowing ring. The fifth end face is in a flat shape. One end of the third air passage is opened at the fifth end face. When the tool changing piston displaces, the fifth end face approaches or moves away from the tool changing air blowing ring. The tool changing air blowing ring is accommodated within the fourth pivotal portion; An oil cylinder seat cover, which is assembled with the oil cylinder seat. The oil cylinder seat cover is provided with a fifth pivotal portion for accommodating one end of the tool changing piston. A part of the tool changing piston protrudes outside the fifth pivotal portion and is restricted by the oil cylinder seat cover so that the tool changing piston does not protrude outside the oil cylinder seat cover. The oil cylinder seat cover is provided with a fourth air passage. When the tool changing piston displaces, one end of the fourth air passage is aligned or not aligned with the third air passage; When the tool changing piston does not displace, there is a gap between the tool changing piston and the tool changing air blowing ring, and the third air passage and the fourth air passage are not aligned. After the tool changing piston displaces, the tool changing piston approaches the tool changing air blowing ring, and the third air passage and the fourth air passage are aligned.

2. The spindle combination structure according to claim 1, characterized in that: Among them, The body is provided on various machine tools or various machining centers. The rotating shaft is in the shape of a round rod and rotates rapidly. At least one set of bearing parts is provided between the rotating shaft and the body. One end of the rotating shaft is for assembling various cutting tools; the cushion ring is in the shape of a circular ring body, the second pivot part is in the shape of a round through groove, the second air passage is in the shape of a round through hole, and the axis of the second air passage is perpendicular to the axis of the second pivot part; the oil cylinder seat is in the shape of a circular body, and the third pivot part is in the shape of a round through groove; the fifth pivot part is in the shape of a round through groove, and the fourth air passage is slightly in the shape of an L-shaped through hole.

3. The spindle combination structure according to claim 1, wherein: Among them, A part of the floating seat has a gap with the body. The first pivot part is in the shape of a round through groove, the first fitting part is in the shape of a convex circular ring body, and the first fitting part is sequentially provided with a first end face and a second end face from the axis outwards. The first end face and the second end face are flat, and the first end face and the second end face are parallel; the second fitting part is in the shape of an annular groove, and the second fitting part is sequentially provided with a third end face and a fourth end face from the axis outwards. The third end face and the fourth end face are flat, and the third end face and the fourth end face are parallel. The third end face is aligned with the first end face, and the fourth end face is aligned with the second end face.

4. The spindle combination structure according to claim 1, wherein: Among them, The floating seat is provided with a plurality of screw holes which are in the shape of internal threads. The plurality of screw holes are arranged in a spaced annular pattern with the first pivot part as the axis; the cushion ring is provided with a plurality of first fixing parts, each first fixing part is aligned with each screw hole, the number of the plurality of first fixing parts matches the number of the plurality of screw holes, the first fixing part is in the shape of a round through hole, and the plurality of first fixing parts are arranged in a spaced annular pattern with the second pivot part as the axis; the oil cylinder seat is provided with a plurality of second fixing parts, each second fixing part is aligned with each first fixing part, the second fixing part is in the shape of a round through hole, and the plurality of second fixing parts are arranged in a spaced annular pattern with the third pivot part as the axis; the oil cylinder seat cover is provided with a plurality of third fixing parts, each third fixing part is aligned with each second fixing part, the third fixing part is in the shape of a round through hole, and the number of the plurality of third fixing parts matches the number of the plurality of second fixing parts; a plurality of fixing pieces are provided, the ends of the fixing pieces are in the shape of external threads, the fixing pieces pass through the third fixing part, the second fixing part and the first fixing part and are screwed to the screw holes, so that the floating seat, the cushion ring, the oil cylinder seat and the oil cylinder seat cover are assembled in sequence.

5. The spindle combination structure according to claim 1, characterized in that: Among them, A fixing rod is provided, and the fixing rod is assembled with the rotating shaft and the tool change blowing ring. The fixing rod rotates rapidly with the rotating shaft. The fixing rod is fixedly arranged on the rotating shaft in the straight direction, so that the tool change blowing ring is fixed on the rotating shaft. The fixing rod has a gas flow channel, and the first air passage and the gas flow channel are communicated with the inside of the rotating shaft to provide blowing.

6. The spindle assembly structure according to claim 1, characterized in that: Among them, There are a plurality of the second air passages, and the plurality of second air passages are arranged in a ring shape with the axis of the cushion ring as the center.

7. The spindle combination structure according to claim 1, wherein: Among them, The knife striking air blowing ring is provided with a first annular groove which is in communication with the first air passage. The gas at the third air passage enters the first annular groove and then enters the first air passage. There are a plurality of the third air passages. The knife striking piston is provided with a second annular groove which can be in communication with the plurality of third air passages. The gas at the fourth air passage enters the second annular groove and then enters the plurality of third air passages.

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