CN210095843U - Abrasive drill connecting structure for operation and abrasive drill - Google Patents

Abstract

The utility model relates to a grinding drill connection structure and grinding drill for operation, connection structure includes connecting axle, plug-in components and sleeve pipe. The end face of one end of the connecting shaft extends inwards along the axial direction to form a shaft hole, the side wall of the connecting shaft is provided with an inserting hole communicated with the shaft hole, and the other end of the connecting shaft is used for being connected with a power output shaft of the power mechanism. When the abrasive drilling connecting structure for the operation is installed, the drill bit connecting rod is inserted into the shaft hole, the plug-in piece is inserted into the shaft hole through the inserting hole and is positioned in the side wall notch of the drill bit connecting rod, the sleeve is sleeved outside the connecting shaft, and the sleeve moves to the position corresponding to the inserting hole in the connecting shaft so as to prevent the plug-in piece from being separated from the inserting hole during abrasive drilling. The connecting shaft can correspondingly drive the drill bit connecting rod to rotate under the driving of the power mechanism so as to carry out grinding operation, and the connecting structure can facilitate connection and is stable in structure.

Description

Abrasive drill connecting structure for operation and abrasive drill

Technical Field

The utility model relates to the technical field of medical equipment, especially relate to an operation is with abrasive drilling connection structure and abrasive drilling.

Background

In medical surgery, a grinding and drilling tool is generally used to grind bone tissue in vivo, for example, to grind bone tissue lesions in minimally invasive otology and skull base surgery. The traditional abrasive drilling connecting structure for the operation is that a drill bit connecting rod is connected with an abrasive drilling handle, and an additional supporting rod accessory is used as a supporting body of the drill bit connecting rod. The grinding drill handle is connected with the micromotor. The micromotor transmits torque to the drill bit connecting rod through the grinding drill handle and transmits the torque to the grinding drill bit through the drill bit connecting rod. However, the drill connecting rod is generally connected in a manner that the tail end is bonded with the connecting shaft of the abrasive drilling handle, or the drill connecting rod is detachably connected by additionally arranging the steel ball and the connecting shaft of the abrasive drilling handle, so that the conventional abrasive drilling connecting structure for the operation is generally unstable, or the connecting structure is complex and high in cost.

Disclosure of Invention

Therefore, it is necessary to overcome the defects of the prior art and provide a grinding drill connection structure for operation and a grinding drill, which can simplify the connection structure, facilitate connection and have stable structure.

The technical scheme is as follows: the utility model provides a grinding drill connection structure for operation is connected with drill bit connecting rod and power unit respectively, includes: the end face of one end of the connecting shaft extends inwards along the axial direction to form a shaft hole, the shaft hole is used for inserting a drill bit connecting rod, an inserting hole communicated with the shaft hole is formed in the side wall of the connecting shaft, and the other end of the connecting shaft is used for being connected with a power output shaft of a power mechanism; the plug-in components are inserted into the shaft holes through the insertion holes and are positioned in the side wall notches of the drill bit connecting rods, and the sleeve is sleeved outside the connecting shaft and is positioned at the insertion holes to resist the plug-in components.

According to the abrasive drilling connecting structure for the operation, during installation, the drill bit connecting rod is inserted into the shaft hole, the plug-in component is inserted into the shaft hole through the inserting hole and is positioned in the side wall notch of the drill bit connecting rod, the sleeve is sleeved outside the connecting shaft, and the sleeve moves to the position corresponding to the inserting hole in the connecting shaft, so that the plug-in component is prevented from being separated from the inserting hole during abrasive drilling. The connecting shaft can correspondingly drive the drill bit connecting rod to rotate under the driving of the power mechanism so as to carry out grinding operation. Therefore, the abrasive drill connecting structure for the operation can be convenient to connect, and is simple in structure and stable in structure.

In one embodiment, the insert is a flat insert plate or a wedge-shaped insert, the insertion hole is a flat or wedge-shaped through hole or groove which is in conformity with the insert, and the side wall notch of the drill connecting rod is a flat or wedge-shaped notch which is in conformity with the insert.

In one embodiment, a first mounting groove is circumferentially arranged on the outer wall of the connecting shaft in a surrounding manner, and is provided with a retaining ring which is directly or indirectly in interference fit with the end part of the sleeve; and/or the outer wall of the connecting shaft is circumferentially provided with a flange in a surrounding manner, and the flange is directly or indirectly in interference fit with the end part of the sleeve.

In one embodiment, the surgical drill milling connection structure further comprises an auxiliary connection assembly, the other end of the connection shaft is connected with a power output shaft of the power mechanism through the auxiliary connection assembly, and the auxiliary connection assembly can move back and forth along the axial direction of the connection shaft.

In one embodiment, the auxiliary connection assembly comprises a spring and a movable shaft sleeve, the movable shaft sleeve is sleeved outside the connecting shaft and used for being connected with a power output shaft of the power mechanism, the spring is sleeved on the connecting shaft, a blocking part in interference fit with one end of the spring is formed in the middle of the outer side wall of the connecting shaft, and the other end of the spring is in interference fit with the end part of the movable shaft sleeve.

The utility model provides a grinding drill, includes operation with grinding drill connection structure, still include grinding drill bit, drill bit connecting rod and handheld piece, grinding drill bit with the drill bit connecting rod links to each other, be equipped with the cavity in the handheld piece, operation with grinding drill connection structure rotationally set up in the cavity, the drill bit connecting rod inserts in the shaft hole.

The abrasive drill comprises the abrasive drill connecting structure for the operation, so that the technical effect is brought by the abrasive drill connecting structure for the operation, and the abrasive drill connecting structure for the operation is the same as the abrasive drill connecting structure for the operation, and is not repeated.

In one embodiment, the abrasive drilling machine further comprises a bearing, the bearing is arranged in the cavity, the connecting shaft is rotatably sleeved in the bearing, a second mounting groove is circumferentially formed in the inner side wall of the cavity in a surrounding mode, and the bearing is limited in the second mounting groove in the axial direction of the connecting shaft.

In one embodiment, a flange or a retainer ring is circumferentially arranged on the outer wall of the connecting shaft in a surrounding manner, one end face of the bearing is abutted against the flange or the retainer ring, and the other end face of the bearing is in interference fit with the other end of the sleeve.

In one embodiment, the abrasive drill further comprises a support guide sleeve disposed in the chamber, and the drill bit connecting rod is rotatably disposed in the support guide sleeve.

In one embodiment, the drill bit further comprises a surgical drill bit support assembly, the drill bit connecting rod is rotatably disposed in the surgical drill bit support assembly, and the surgical drill bit support assembly is connected to the hand piece.

Drawings

Fig. 1 is a schematic structural diagram of a grinding drill according to an embodiment of the present invention;

FIG. 2 is a view-angle diagram of a surgical burr connecting structure according to an embodiment of the present invention;

FIG. 3 is a view showing another perspective structure of the connection structure of the surgical burr according to an embodiment of the present invention;

FIG. 4 is an exploded view of a surgical burr attachment structure according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a connecting shaft according to an embodiment of the present invention.

Reference numerals:

10. the surgical abrasive drilling connecting structure comprises a connecting shaft 11, a connecting shaft 111, shaft holes 112, inserting holes 113, a first mounting groove 114, a retainer ring 115, a flange 116, a first shaft body 117, a second shaft body 12, an insertion piece 13, a sleeve 20, a drill connecting rod 21, a notch 30, a grinding drill 40, an auxiliary connecting assembly 41, a spring 42, a movable shaft sleeve 421, a kidney-shaped hole 43, a reinforcing sleeve 44, a bolt 50, a surgical abrasive drilling supporting assembly 60, a hand piece 61, a cavity 62, a second mounting groove 63, a supporting body 64, a shell 70, a bearing 80 and a supporting guide sleeve.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

In one embodiment, referring to fig. 1 to 3, a surgical burr connecting structure 10 is connected to a drill connecting rod 20 and a power mechanism, respectively, and includes a connecting shaft 11, an insert 12 and a sleeve 13. An axial hole 111 extends inward in the axial direction from one end surface of the connecting shaft 11, and the axial hole 111 is used for inserting the bit connecting rod 20. The side wall of the connecting shaft 11 is provided with an insertion hole 112 communicated with the shaft hole 111, and the other end of the connecting shaft 11 is used for being connected with a power output shaft of a power mechanism. The insert 12 is inserted into the shaft hole 111 through the insertion hole 112 and is located in the sidewall recess 21 of the drill connecting rod 20, and the sleeve 13 is sleeved outside the connecting shaft 11 and located at the insertion hole 112 to abut against the insert 12.

When the above-mentioned abrasive drilling connection structure 10 for operation is installed, the drill connecting rod 20 is inserted into the shaft hole 111, the insert 12 is inserted into the shaft hole 111 through the insertion hole 112 and is positioned in the sidewall notch 21 of the drill connecting rod 20, the sleeve 13 is sleeved outside the connecting shaft 11, and the sleeve 13 moves to a position corresponding to the insertion hole 112 on the connecting shaft 11, so as to prevent the insert 12 from being separated from the insertion hole 112 during the abrasive drilling operation. The connecting shaft 11 can correspondingly drive the drill connecting rod 20 to rotate under the driving of the power mechanism so as to carry out grinding operation. Thus, the abrasion drill connection structure 10 for operation can be connected conveniently, and is simple in structure and stable in structure.

In one embodiment, referring to fig. 1 and 4, the insert 12 is a flat insert plate or a wedge-shaped insert, the insertion hole 112 is a flat or wedge-shaped through hole or groove conforming to the insert 12, and the notch 21 is a flat or wedge-shaped notch conforming to the insert 12. In this way, after the insert 12 is inserted into the insertion hole 112, the insert 12 can make the connection between the drill connecting rod 20 and the connecting shaft 11 stable, and the insert 12 is not easily broken during the high-speed rotation of the connecting shaft 11. In addition, the insert 12 is not limited to an insert plate, but may be an insert rod, and the number of the insert 12 and the insertion hole 112 is also not limited, and may be one or two or more, and the corresponding recess 21 may be one or two or more. The insertion end of the plug-in 12 is provided with a chamfer to play a guiding role and facilitate the insertion into the insertion hole 112.

Further, referring to fig. 1 and 4, a first installation groove 113 is circumferentially arranged around the outer wall of the connecting shaft 11, the first installation groove 113 is provided with a retaining ring 114, and the retaining ring 114 is directly or indirectly in interference fit with the end of the sleeve 13; and/or the outer wall of the connecting shaft 11 is circumferentially provided with a flange 115 in a surrounding manner, and the flange 115 is directly or indirectly in interference fit with the end part of the sleeve 13. Thus, when the retainer ring 114 and/or the flange 115 directly or indirectly abut against the two ends of the sleeve 13, the sleeve 13 is axially limited, and the sleeve 13 is prevented from moving along the axial direction of the connecting shaft 11. Two retaining rings 114 can be arranged on the connecting shaft 11 at intervals to axially limit the sleeve 13, or two flanges 115 can be arranged at intervals to axially limit the sleeve 13, or one retaining ring 114 and one flange 115 can be arranged at intervals to axially limit the sleeve 13. Specifically, the retainer ring 114 is a rubber retainer ring or a wire retainer ring.

In one embodiment, the surgical burr attachment structure 10 further includes an auxiliary connection assembly 40. The other end of the connecting shaft 11 is connected with a power output shaft of the power mechanism through the auxiliary connecting assembly 40. The auxiliary connection assembly 40 can move back and forth along the axial direction of the connection shaft 11. Thus, when the surgical burr connecting structure 10 is mounted on the power output shaft of the power mechanism, the axial force of the power output shaft of the power mechanism is applied to the surgical burr connecting structure 10 in the axial direction, and the auxiliary connecting assembly 40 can move along the axial direction of the connecting shaft 11 in the position of the power output shaft of the power mechanism, so that the power output shaft and the connecting shaft 11 are prevented from being bent or damaged due to the excessive force.

Further, the auxiliary connection assembly 40 includes a spring 41 and a movable bushing 42. The movable shaft sleeve 42 is sleeved outside the connecting shaft 11, and the movable shaft sleeve 42 is used for being connected with a power output shaft of the power mechanism. The spring 41 is sleeved on the connecting shaft 11, a resisting part in interference fit with one end of the spring 41 is formed in the middle of the outer side wall of the connecting shaft 11, and the other end of the spring 41 is in interference fit with the end part of the movable shaft sleeve 42. When the power mechanism is installed, the movable shaft sleeve 42 is retracted through the spring 41 to move along the axial direction of the connecting shaft 11 when receiving the axial force of the power output shaft of the power mechanism, so that the power output shaft and the connecting shaft 11 are prevented from being bent or damaged due to overlarge stress; when the installation is in place, the movable shaft sleeve 42 is firmly abutted to the power output shaft of the power mechanism through the rebounding of the spring 41, so that the connection is prevented from falling off, and the connection stability and the torque transmission efficiency are improved.

In one embodiment, the secondary connection assembly 40 further includes a latch 44. The movable shaft sleeve 42 is provided with a kidney-shaped hole 421 along the axial direction, the connecting shaft 11 is connected with the bolt 44, and the bolt 44 is movably arranged in the kidney-shaped hole 421. Therefore, the plug pin 44 only moves in the waist-shaped hole 421, and the waist-shaped hole 421 plays a role in guiding and limiting the plug pin 44, so that the movable shaft sleeve 42 moves and is limited in the axial direction, and the power output shaft and the connecting shaft 11 are prevented from being bent or damaged due to the fact that the movable shaft sleeve 42 deviates from the axial direction when moving.

Further, the auxiliary connecting assembly 40 further includes a reinforcing sleeve 43, one end of the reinforcing sleeve 43 is formed with a hole facing the connecting shaft 11 and allowing the connecting shaft 11 to pass through, and the other end thereof is opened facing the movable shaft sleeve 42 and sleeved outside the movable shaft sleeve 42. During the assembly, on the connecting axle 11 was established to the spring 41 cover, the connecting axle 11 was put in to the porose one end of reinforcing sleeve 43, and movable shaft sleeve 42 cover is located outside the connecting axle 11, reinforcing sleeve 43 compression spring 41 was to exposing waist type hole 421, and bolt 44 releases spring 41 after inserting waist type hole 421, overlaps reinforcing sleeve 43 in movable shaft sleeve 42's waist type hole 421 department through spring 41 resilience force, and it avoids bolt 44 to drop to keep out bolt 44, plays the effect of being convenient for the assembly and increasing connection stability. In addition, the reinforcing sleeve 43 can further stabilize the structural strength between the movable sleeve 42 and the connecting shaft 11.

In one embodiment, referring to fig. 1, 4 and 5, the connecting shaft 11 includes a first shaft body 116 and a second shaft body 117 coaxially connected. The diameter of the first shaft 116 is larger than that of the second shaft 117, so that the outer sidewalls of the first shaft 116 and the second shaft 117 are in a stepped structure. The sleeve 13 is sleeved outside the first shaft body 116, and the first shaft body 116 is used for connecting with the drill bit connecting rod 20. The spring 41 is sleeved outside the second shaft body 117, and the second shaft body 117 is used for being connected with the auxiliary connecting assembly 40. One end of the spring 41 abuts a shoulder of the first shaft body 116. In another embodiment, the diameter of the first shaft 116 may be equal to or smaller than the diameter of the second shaft 117, and by providing a boss between the two shafts, one end of the spring 41 abuts against the boss.

In one embodiment, referring to fig. 1 again, a milling drill includes the surgical milling drill connection structure 10 of any of the above embodiments, further includes a milling drill 30, a drill connection rod 20 and a hand piece 60. The grinding drill 30 is connected with the drill connecting rod 20, a cavity 61 is arranged in the hand piece 60, the surgical grinding drill connecting structure 10 is rotatably arranged in the cavity 61, and the drill connecting rod 20 is inserted into the shaft hole 111.

The above-mentioned abrasive drill includes the abrasive drill connection structure 10 for operation, and the technical effects thereof are brought by the abrasive drill connection structure 10 for operation, which is the same as the abrasive drill connection structure 10 for operation, and thus the description thereof is omitted. Specifically, the grinding bit 30 and the bit connecting rod 20 may be integrally formed by a machining method such as forging or casting, or may be integrally formed by welding, caulking, bolting, or the like.

In one embodiment, referring again to fig. 1, the drill further includes a bearing 70. The bearing 70 is disposed in the cavity 61, and the connecting shaft 11 is rotatably sleeved in the bearing 70. In this way, the bearing 70 can facilitate the rotation of the connecting shaft 11.

Further, referring to fig. 1 again, a second mounting groove 62 is circumferentially formed around an inner side wall of the cavity 61, and the bearing 70 is limited in the second mounting groove 62 in the axial direction of the connecting shaft 11.

Further, referring to fig. 1, the hand piece 60 includes a supporting body 63 and a housing 64. The housing 64 is detachably sleeved on the supporting body 63, and the second mounting groove 62 is formed by enclosing the supporting body 63 and the housing 64.

Specifically, the support body 63 is provided with a first channel, the housing 64 is provided with a second channel, the inner wall of the first channel is stepped, the inner wall of the second channel is also stepped, the inner diameter of the high-order circumferential surface of the housing 64 is smaller than the inner diameter of the low-order circumferential surface of the support body 63, the low-order circumferential surface of the housing 64 is sleeved on the support body 63, the high-order radial surface of the housing 64 is in interference fit with the end surface of the support body 63, and the high-order radial surface of the housing 64, the low-order circumferential surface of the support body 63 and the high-order radial surface of the support body 63. The reverse can also be achieved.

In one embodiment, a flange 115 or a retaining ring 114 is circumferentially arranged around the outer wall of the connecting shaft 11, one end surface of the bearing 70 is abutted against the flange 115 or the retaining ring 114, and the other end surface of the bearing 70 is in interference fit with the other end of the sleeve 13. The bearing 70 and the sleeve 13 are confined between two flanges 115, or between two retaining rings 114, or between a flange 115 and a retaining ring 114. In addition, the axial position of the bearing 70 and the sleeve 13 fitted over the connecting shaft 11 are interchangeable.

In one embodiment, referring again to fig. 1, the drill further includes a support guide sleeve 80. The support guide sleeve 80 is disposed in the chamber 61, and the drill connecting rod 20 is rotatably disposed in the support guide sleeve 80. Specifically, the support guide sleeve 80 is a copper sleeve, a stainless steel sleeve, or a non-metal sleeve, or the like. Thus, the bearing 70 supports the connecting shaft 11, and the support guide sleeve 80 supports the drill connecting rod 20, so that the drill connecting rod 20 has better rotational stability.

In addition, the supporting guide sleeve 80 may be in clearance fit with the cavity 61, i.e., may be rotatably disposed in the cavity 61; the support and guide sleeve 80 may also be in transition fit with the cavity 61, i.e., the support and guide sleeve 80 does not rotate with the drill connecting rod 20 during rotation of the drill connecting rod 20. A third mounting groove may be circumferentially formed in the inner side wall of the cavity 61, so as to limit the support guide sleeve 80 in the axial direction of the connecting shaft.

In one embodiment, referring to fig. 1 again, a gap is provided between one end surface of the supporting and guiding sleeve 80 and an end surface of the connecting shaft 11, and a gap is provided between the other end surface of the supporting and guiding sleeve 80 and a boss in the cavity 61. Therefore, the rotation between the supporting guide sleeve 80 and the connecting shaft 11 cannot interfere with each other, the supporting guide sleeve 80 cannot interfere with the boss in the cavity 61 in the rotation process, and the operation stability is good.

Further, the mouth part of the sleeve body end face of the supporting guide sleeve 80 is provided with a chamfer, namely, the mouth part is specifically horn-shaped, so that the drill bit connecting rod 20 is more convenient to insert into the supporting guide sleeve 80 through the horn mouth in the assembling process of the abrasive drilling, and the supporting guide sleeve 80 plays a role in guiding and is convenient to install.

In one embodiment, the burr further includes a surgical burr support assembly 50. The drill connecting rod 30 is rotatably disposed in the surgical burr support assembly 50, and the surgical burr support assembly 50 is connected to the handpiece 60. The abrasive drilling support component 50 for the operation plays a role in supporting and protecting the drill bit connecting rod 30, so that the drill bit connecting rod 30 is prevented from being broken due to excessive force exerted by an operator in the operation process, meanwhile, tissue abrasion caused by high-speed rotation of the drill bit connecting rod 30 to a human body operation channel is also avoided, and the improvement of the operation safety is facilitated.

Specifically, the surgical drill support assembly 50 includes a support tube disposed around the drill connecting rod 20 and inserted into and connected to a mounting hole in the front end of the hand piece 60.

In one embodiment, the surgical drill milling support assembly 50 may further include a water injection assembly, which is provided with a water injection channel, wherein the water injection channel may be a soft water injection pipe externally connected, or a hard water injection pipe attached to the support pipe and arranged in parallel with the support pipe, or a water injection channel is formed between the outer wall of the support pipe and the inner wall of the connection sleeve by directly using the inner cavity of the support pipe as the water injection channel, or by sleeving the connection sleeve on the outer side of the support pipe. The water injection assembly is favorable for cooling the whole grinding drill, particularly the grinding drill bit 30, so that thermal burn to tissues is avoided, and the operation safety is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a grinding drill connection structure for operation is connected with drill bit connecting rod and power unit respectively which characterized in that includes:

the end face of one end of the connecting shaft extends inwards along the axial direction to form a shaft hole, the shaft hole is used for inserting a drill bit connecting rod, an inserting hole communicated with the shaft hole is formed in the side wall of the connecting shaft, and the other end of the connecting shaft is used for being connected with a power output shaft of a power mechanism;

the plug-in components are inserted into the shaft holes through the insertion holes and are positioned in the side wall notches of the drill bit connecting rods, and the sleeve is sleeved outside the connecting shaft and is positioned at the insertion holes to resist the plug-in components.

2. The surgical burr connecting structure of claim 1, wherein the insert is a flat insert plate or a wedge-shaped insert, the insertion hole is a flat or wedge-shaped through hole or a groove that conforms to the insert, and the sidewall recess of the drill connecting rod is a flat or wedge-shaped notch that conforms to the insert.

3. The surgical burr connecting structure of claim 1, wherein a first mounting groove is circumferentially formed around an outer wall of the connecting shaft, the first mounting groove being provided with a retainer ring, the retainer ring being in direct or indirect interference fit with an end of the sleeve; and/or the outer wall of the connecting shaft is circumferentially provided with a flange in a surrounding manner, and the flange is directly or indirectly in interference fit with the end part of the sleeve.

4. The surgical burr connecting structure of claim 1, further comprising an auxiliary connecting assembly, wherein the other end of the connecting shaft is connected to a power output shaft of the power mechanism through the auxiliary connecting assembly, and the auxiliary connecting assembly can move back and forth along an axial direction of the connecting shaft.

5. The abrasive drilling connection structure for the operation according to claim 4, wherein the auxiliary connection assembly comprises a spring and a movable shaft sleeve, the movable shaft sleeve is sleeved outside the connection shaft and is used for being connected with a power output shaft of the power mechanism, the spring is sleeved on the connection shaft, a resisting part which is in interference fit with one end of the spring is formed in the middle of the outer side wall of the connection shaft, and the other end of the spring is in interference fit with the end part of the movable shaft sleeve.

6. A burr comprising the surgical burr connecting structure of any one of claims 1 to 5, further comprising a grinding bit, a bit connecting rod, and a hand piece, wherein the grinding bit is connected to the bit connecting rod, a chamber is provided in the hand piece, the surgical burr connecting structure is rotatably provided in the chamber, and the bit connecting rod is inserted into the shaft hole.

7. The abrasive drill according to claim 6, further comprising a bearing, wherein the bearing is disposed in the cavity, the connecting shaft is rotatably sleeved in the bearing, a second mounting groove is circumferentially formed around an inner side wall of the cavity, and the bearing is limited in the second mounting groove in an axial direction of the connecting shaft.

8. The abrasive drilling machine according to claim 7, wherein a flange or a retainer ring is circumferentially arranged around the outer wall of the connecting shaft, one end surface of the bearing is abutted against the flange or the retainer ring, and the other end surface of the bearing is abutted against and matched with the other end of the sleeve.

9. The abrasive drill of claim 6, further comprising a support guide sleeve disposed within the chamber, the drill bit connecting rod rotatably disposed within the support guide sleeve.

10. The burr of any of claims 6 to 9, further comprising a surgical burr support assembly, the bit connecting rod being rotatably disposed within the surgical burr support assembly, the surgical burr support assembly being connected to the handpiece.

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