Chuck type medical bone drill

Abstract

The utility model provides a chuck type medical bone drill which is of a pen-shaped structure, and internal parts are concentrically arranged with a transmission shaft as the axis. The head end of the bone drill is detachably connected with a drill bit through a conical chuck; a locking block which is matched and locked with the conical chuck through a conical surface is arranged in the bone drill; the tail end of the conical chuck is connected with a transmission shaft, a shaft body of the transmission shaft is connected with a button on the side face of the bone drill through a bearing mechanism, and the button is pushed to link the conical chuck to move front and back to achieve opening and closing locking. According to the bone drill, the design structure of the conical chuck is adopted, and the defects that an abrasive drill is popped out and falls off, and a popping mechanism is prone to being clamped when the abrasive drill is placed in are overcome; meanwhile, the abrasion drill is locked through front-back movement of the button, compared with knob type locking, the abrasion drill is convenient to install or replace, meanwhile, the internal structure of the bone drill is simplified, dynamic response is timely and rapid, friction in the abrasion drill is effectively reduced through the design of one transmission shaft, and the conditions of heat conduction and temperature rise of the abrasion drill are reduced; and high-efficiency operation can be realized under the condition of long-time operation.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a chuck-type medical bone drill. Background Technology

[0002] As a core component of the orthopedic surgical power system, the bone drill plays a crucial role in many delicate surgeries. It integrates power transmission and tool clamping functions, ensuring precision and efficiency during the surgical process. Specifically, the precision-designed clamping mechanism of the bone drill chuck securely holds the surgical instrument, preventing it from slipping or shifting during high-speed rotation—a fundamental guarantee of surgical safety and success.

[0003] The power transmission section acts as a bridge between the bone drill chuck and the surgical power unit. It efficiently and seamlessly transmits the powerful force generated by the power unit to the cutting tool, driving it to rotate at high speed and stably. The precision and efficiency of this power transmission directly determine the smoothness and accuracy of the operation, which is crucial for surgeries involving delicate manipulation of bone tissue.

[0004] Therefore, the medical bone drill is not only a device in the surgical instrument, but also one of the key factors to ensure the success of the operation and the patient's recovery.

[0005] However, current high-speed medical bone drills also have many problems. First, many high-speed bone drills have a drill ejection mechanism, but this often causes the drill to pop out and fall, and the mechanism can easily get stuck when inserting the drill. The locking knob of the bone drill also often uses a rotary tightening method, which requires a lot of torque and is not convenient to unlock. The integrated design of the motor and handheld device not only makes the entire bone drill very large, but also transfers heat directly to the doctor's hand, making it difficult to use continuously. The handheld device often uses a gun-style handle, which is difficult to provide high accuracy and is also very inconvenient to use.

[0006] For example, Chinese utility model patent CN 220530081 U relates to a power handle for a skull drill, in which a motor and reducer are integrated into the handle body, greatly increasing the weight and heat generation of the handle; Chinese utility model patent CN211156057 U discloses an electric bone drill for orthopedics, in which a battery is fixed inside the outer shell handle, which has the same problems as the built-in motor method; and Chinese utility model patent CN 214434376 U discloses a multifunctional medical bone drill, which uses threads to screw the drill bit onto the bone drill device by external force, which is more complicated. Utility Model Content

[0007] The purpose of this invention is to propose a chuck-type medical bone drill that simplifies the complex bone drill mechanism, reduces heat generation and vibration, and is easy to use.

[0008] To achieve the above objectives, this utility model proposes a chuck-type medical bone drill. The bone drill has a pen-shaped structure, and its internal components are arranged concentrically around the drive shaft. The key feature is that the head end of the bone drill is detachably connected to the drill bit via a tapered chuck. The bone drill is equipped with a locking block inside that engages with the tapered chuck through a tapered surface.

[0009] The tail end of the tapered chuck is connected to the drive shaft, and the shaft is connected to the button on the side of the bone drill through a bearing mechanism. Pushing the button will cause the tapered chuck to move back and forth to achieve opening, closing and locking.

[0010] Furthermore, the bone drill housing includes a lock head, a front sleeve, a front housing, a rear housing, and a rear housing, which are coaxially connected end to end.

[0011] Furthermore, the inner surface of the locking block is provided with a conical surface with the same slope as the outer surface of the conical chuck; by adjusting the relative position of the conical chuck within the locking block, the opening and closing of the conical chuck clamping part is achieved by utilizing the cooperation between the conical surfaces.

[0012] Furthermore, the locking block and the tapered chuck are located inside the front sleeve; a first bearing is installed between the drive shaft and the inner wall of the front sleeve; a protective cover plate is installed between the first bearing and the tail of the locking block.

[0013] Furthermore, the bearing mechanism includes a movable bearing housing, a bearing housing cap, a tail shaft nut, a second bearing, and a third bearing;

[0014] The movable bearing housing is sleeved on the drive shaft. A second bearing is provided between the first end of the movable bearing housing and the drive shaft. After the bearing housing cap is screwed onto the first end of the movable bearing housing, the second bearing is fixed.

[0015] A third bearing is provided between the tail end of the movable bearing housing and the drive shaft. The tail shaft nut is screwed onto the drive shaft near the tail end to fix the third bearing.

[0016] Furthermore, the side wall of the rear housing is provided with an oblong hole along the axial direction, the button cover is placed on the oblong hole, and the button is fixed to the movable bearing seat by bolts.

[0017] Furthermore, the length of the waist-shaped hole is the axial movable distance of the tapered chuck.

[0018] Furthermore, a power input mechanism is connected to the tail end of the drive shaft;

[0019] The power input mechanism includes a power input shaft, a power output shaft, a sleeve, a pin, and a bearing sleeve;

[0020] The power input shaft is located inside the rear housing. The tail end of the power input shaft is connected to the drive mechanism shaft. The side wall of the head end of the power input shaft has an elongated slot. The tail end of the power output shaft has a pin hole. After the tail end of the power output shaft is inserted into the head end of the power input shaft, the connection is achieved by inserting a pin into the slot and the pin hole. The sleeve is fitted onto the power output shaft and the connection end of the power output shaft to fix the pin.

[0021] The front half of the power output shaft is located inside the rear housing. A fourth bearing and a fifth bearing are installed after the power output shaft and the inner wall of the rear housing. A first retaining ring is installed between the fourth bearing and the fifth bearing.

[0022] The beginning of the power output shaft is stepped, and the shaft surface of the bearing sleeve is a matching stepped shaft surface. After fixing the bearing sleeve to the beginning of the power output shaft, the fourth bearing and the fifth bearing are pressed against the limiting protrusion inside the rear housing.

[0023] A wire retaining ring is provided between the inner ring of the stepped axial surface of the bearing sleeve and the end of the power output shaft.

[0024] Furthermore, the rear housing and the rear end housing are fastened together by two interlocking "L"-shaped edges, with a certain clearance between the two "L"-shaped edges, the clearance being the same as the length of the elongated slot.

[0025] Furthermore, the tail end of the drive shaft is a "I"-shaped insert, and the head end of the power output shaft is a "I"-shaped slot. When the insert is inserted into the slot, it can be pulled out relative to the slot without disengaging.

[0026] Compared with the prior art, the advantages of this utility model are:

[0027] 1. The bone drill of this utility model adopts a conical chuck design structure, which avoids the disadvantages of the drill being ejected and falling, and the ejection mechanism being easily jammed when inserted; at the same time, the drill is locked by moving the button back and forth, which is easier to install or replace the drill than the knob locking.

[0028] 2. The pen-like overall shell structure makes it easier to hold, further improving surgical accuracy and making it easier for medical staff to hold, thus improving surgical precision.

[0029] 3. The separate installation of the whole unit and the motor makes it easy to replace, reduces the weight of the device itself, makes it more convenient to use, and has better versatility and practicality.

[0030] 4. The bone drill of this utility model uses a single drive shaft for transmission, which provides timely power response and effectively reduces internal friction and heat conduction, allowing it to operate efficiently even during long-term surgeries.

[0031] 5. The internal structure of the bone drill of this utility model is distinct, and each bearing is fixed by a bushing, resulting in a stable internal structure and a long service life. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the chuck-type medical bone drill in this embodiment of the present invention;

[0033] Figure 2 This is a cross-sectional view of the chuck-type medical bone drill in an embodiment of the present invention;

[0034] Figure 3 This is an exploded view of the chuck-type medical bone drill in an embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the conical chuck in the chuck-type medical bone drill of this utility model embodiment;

[0036] Figure 5 This is a schematic diagram of the power output shaft in the chuck-type medical bone drill of this utility model embodiment;

[0037] Figure 6 This is a schematic diagram of the power input shaft in the chuck-type medical bone drill of this utility model embodiment. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described below.

[0039] In this patent, the front end is the end closer to the drill bit, and the rear end is the end closer to the motor.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model proposes a chuck-type medical bone drill. For ease of gripping, the bone drill has a pen-like structure. The outer shell of the bone drill includes a locking head 1, a front sleeve 2, a front housing 3, a rear housing 4, and a rear housing 5, all coaxially connected end-to-end. The locking head 1, the front sleeve 2, the front housing 3, and the rear housing 4 are connected by screw threads. Figure 2 As shown, the rear housing 5 and the rear housing 4 are fastened together by two interlocking "L"-shaped edges. A certain gap is reserved between the two "L"-shaped edges. That is, by pulling or pressing the rear housing 4, the rear housing 4 can achieve axial displacement relative to the rear housing 5. The displacement distance is the size of the gap.

[0041] In this embodiment, as Figure 2 and Figure 3As shown, the internal components are arranged concentrically around the drive shaft 8; the head of the bone drill is detachably connected to the drill bit via a tapered chuck 7; the bone drill has a locking block 6 inside that engages with the tapered chuck 7 via a tapered surface; as shown... Figure 4 As shown, in this embodiment, the conical chuck 7 is a two-jaw locking chuck. Since the inner surface of the locking block 6 is provided with a conical surface with the same slope as the outer surface of the conical chuck 7, the relative position of the conical chuck 7 within the locking block 6 is adjusted by driving the axial displacement of the conical chuck 7. The opening and closing between the two jaws is realized by the cooperation between the conical surfaces, thereby realizing the fixing and loosening of the grinding drill.

[0042] In this embodiment, the locking block 6 and the tapered chuck 7 are located inside the front sleeve 2; a first bearing 10 is installed between the drive shaft 8 and the inner wall of the front sleeve 2; a protective cover plate 9 is installed between the first bearing 10 and the tail of the locking block 6, and the protective cover plate 9 fixes the first bearing 10 to ensure the stability of the rotation of the front part of the drive shaft 8.

[0043] In this embodiment, the side wall of the rear housing 4 has an oblong hole along the axial direction. The button 15 is placed on the oblong hole and is fixed to the movable bearing seat 13 by bolts 14. The length of the oblong hole is the axial movable distance of the tapered chuck 7. The movable bearing seat 13 is sleeved on the drive shaft 8. A second bearing 12 is provided between the first end of the movable bearing seat 13 and the drive shaft 8. After the bearing seat cap 11 is screwed onto the first end of the movable bearing seat 13, the second bearing 12 is fixed. A third bearing 16 is provided between the tail end of the movable bearing seat 13 and the drive shaft 8. After the tail shaft nut 17 is screwed onto the drive shaft 8 near the tail end, the third bearing 16 is fixed. Specifically, when it is necessary to hold the drill bit, simply push the movable bearing seat 13 forward by pressing button 15. The movable bearing seat 13 drives the drive shaft 8 and the conical chuck 7 to move forward together. The fit between the conical chuck 7 and the conical surface of the locking block 6 is used to close the two chucks, thereby fixing the drill bit. Similarly, if it is necessary to release the drill bit, simply move button 15 in the opposite direction.

[0044] In this embodiment, a power input mechanism is connected to the tail end of the drive shaft 8; the power input mechanism includes a power input shaft 26, a power output shaft 18, a sleeve 24, a pin 25, and a bearing sleeve 23; the power input shaft 26 is located inside the rear housing 5, and the tail end of the power input shaft 26 is connected to the drive mechanism shaft, such as... Figure 6 As shown, the side wall at the head end of the power input shaft 26 has a long, narrow slot, such as... Figure 5 As shown, the tail end of the power output shaft 18 has a pin hole. After the tail end of the power output shaft 18 is inserted into the head end of the power input shaft 26, the connection is achieved by inserting a pin 25 into the slot and the pin hole. The sleeve 24 is sleeved on the connection end of the power output shaft 18 and the power output shaft 18 to fix the pin 25; at the same time, due to... Figure 6The elongated slot shown is designed to be fixed to the rear housing 5 and the rear housing 4 by two interlocking "L" shaped edges, as described earlier. A certain gap is reserved between the two "L" shaped edges, so that by pulling or pressing the rear housing 4, both the rear housing 4 and the power input shaft 26 can achieve axial displacement, thereby adapting to various specifications of drive motors.

[0045] The front half of the power output shaft 18 is located inside the rear housing 4. A fourth bearing 19 and a fifth bearing 21 are installed behind the power output shaft 18 and the inner wall of the rear housing 4. A first retaining ring 20 is installed between the fourth bearing 19 and the fifth bearing 21. The beginning end of the power output shaft 18 is stepped, and the axial surface of the bearing sleeve 23 is a matching stepped axial surface. After fixing the bearing sleeve 23 to the beginning end of the power output shaft 18, the fourth bearing 19 and the fifth bearing 21 are pressed against the limiting protrusions inside the rear housing 4. A wire retaining ring 22 is provided between the inner ring of the stepped axial surface of the bearing sleeve 23 and the end of the power output shaft 18. When the drive mechanism drives the power input shaft 26, the power output shaft 18, the transmission shaft 8, and the tapered chuck 7 to rotate synchronously, the first bearing 10, the second bearing 12, the third bearing 16, the fourth bearing 19, and the fifth bearing 21 effectively lubricate, reduce friction, and reduce heat generation, providing sufficient stability for equipment operation.

[0046] In this embodiment, as Figure 2 As shown, the tail end of the drive shaft 8 is a "I"-shaped insert, as... Figure 5 The power output shaft 18 shown has an "I"-shaped slot at its head. When the insert rod is inserted into the slot, it can be pulled out relative to the slot without being dislodged.

[0047] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A chuck-type medical bone drill, which is in a pen-like structure, and the inner components are concentrically arranged around a transmission shaft (8); characterized in that, The first end of the bone drill is detachably connected with the drill bit through the taper chuck (7); and the bone drill is internally provided with a locking block (6) locked with the taper chuck (7) through taper surface cooperation. The tail end of the taper chuck (7) is connected with the transmission shaft (8), the shaft body of the transmission shaft (8) is connected with the button (15) on the side of the bone drill through a bearing mechanism, the button (15) is pushed to link the forward and backward displacement of the taper chuck (7) to realize the opening and closing locking.

2. The chuck medical bone drill according to claim 1, characterized in that The bone drill shell comprises a lock head (1), a front end sleeve (2), a front shell body (3), a rear shell body (4) and a rear end shell body (5) connected coaxially in sequence.

3. The chuck medical bone drill according to claim 1, wherein, The inner surface of the locking block (6) is provided with a taper surface with the same slope as the outer surface of the taper chuck (7); the relative position of the taper chuck (7) in the locking block (6) is adjusted, and the opening and closing of the clamping part of the taper chuck (7) is realized through the cooperation between the taper surfaces.

4. The collet medical bone drill of claim 2 wherein, The locking block (6) and the taper chuck (7) are located in the front end sleeve (2); the first bearing (10) is installed between the transmission shaft (8) and the inner wall of the front end sleeve (2); the sheath cover plate (9) is installed between the first bearing (10) and the tail part of the locking block (6).

5. The chuck medical bone drill according to claim 2, wherein, The bearing mechanism comprises a movable bearing seat (13), a bearing seat cap (11), a tail shaft nut (17), a second bearing (12) and a third bearing (16); The movable bearing seat (13) is sleeved on the transmission shaft (8), the second bearing (12) is arranged between the front end of the movable bearing seat (13) and the transmission shaft (8), and the bearing seat cap (11) is screwed on the front end of the movable bearing seat (13) to fix the second bearing (12); The third bearing (16) is arranged between the tail end of the movable bearing seat (13) and the transmission shaft (8), and the tail shaft nut (17) is screwed on the position close to the tail end of the transmission shaft (8) to fix the third bearing (16).

6. The chuck medical bone drill according to claim 5, wherein, The side wall of the rear shell body (4) is provided with a waist-shaped hole in the axial direction, the button (15) is arranged on the waist-shaped hole, and the button (15) is fixed with the movable bearing seat (13) through the bolt (14).

7. The chuck medical bone drill according to claim 6, wherein, The length of the waist-shaped hole is the axial movable distance of the taper chuck (7).

8. The chuck medical bone drill according to claim 2, wherein, The tail end of the transmission shaft (8) is connected with a power input mechanism; The power input mechanism comprises a power input shaft (26), a power output shaft (18), a sleeve (24), a column pin (25) and a bearing pressing sleeve (23). The power input shaft (26) is arranged in the rear end shell (5), the tail end of the power input shaft (26) is connected with the driving mechanism shaft, the side wall of the head end of the power input shaft (26) is provided with a long slot, the tail end of the power output shaft (18) is provided with a pin hole, after the tail end of the power output shaft (18) is inserted into the head end of the power input shaft (26), the connection is realized by inserting the column pin (25) into the slot and the pin hole, the sleeve (24) is sleeved on the power output shaft (18) and the connecting end of the power output shaft (18), and the column pin (25) is fixed; The front half of the power output shaft (18) is located in the rear shell (4), the power output shaft (18) is provided with a fourth bearing (19) and a fifth bearing (21) on the inner wall of the rear shell (4); a first retainer (20) is arranged between the fourth bearing (19) and the fifth bearing (21); The head end of the power output shaft (18) is stepped, the shaft surface of the bearing pressing sleeve (23) is a matched stepped shaft surface, after the bearing pressing sleeve (23) is fixed on the head end of the power output shaft (18), the fourth bearing (19) and the fifth bearing (21) are abutted between the limiting protrusions inside the rear shell (4); The inner ring of the stepped shaft surface of the bearing pressing sleeve (23) is provided with a steel wire retainer (22) between the end of the power output shaft (18).

9. The chuck medical bone drill according to claim 8, wherein, The rear shell (4) and the rear end shell (5) are fixed by two "L" shaped overlapping edges, a certain movement gap is reserved between the two "L" shaped overlapping edges, and the length of the movement gap is the same as that of the long slot.

10. The chuck medical bone drill according to claim 8, wherein, The tail end of the transmission shaft (8) is a "I" shaped insertion rod, the head end of the power output shaft (18) is a "I" shaped insertion slot, when the insertion rod is inserted into the insertion slot, the insertion rod can be pulled out relative to the insertion slot without being separated.

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