CN109199525B - Multifunctional medical bone drill - Google Patents

Abstract

The invention discloses a multifunctional medical bone drill, comprising a bone drill body and a drill bit connected, the bone drill body comprising a control device, a casing, a handle, a motor, and a transmission device, the handle is fixedly connected to the bottom of the casing, the transmission device is arranged inside the casing, the motor is arranged inside the handle, a gear group connected to the transmission device is arranged on the top of the motor, a rear cap connected to the casing is arranged at one end of the transmission device near the gear group, a connecting groove connected to the drill bit is arranged at the other end, a connecting spindle matching the connecting groove is arranged on the drill bit, a tail sleeve connected to the casing is sleeved on the connecting spindle, and a locking device connected to the tail sleeve is arranged on the casing; the locking device comprises an inner sleeve cap, a positioning pin, a knob, and a casing cap, the knob is sleeved on the transmission device, an inner sleeve is arranged between the knob and the transmission device, the inner sleeve is respectively connected to the inner sleeve cap and the casing, the casing cap is sleeved on one end of the inner sleeve near the casing, the positioning pin is connected to the inner sleeve, and a positioning groove matching the positioning pin is arranged on the tail sleeve.

Description

A multifunctional medical bone drill

Technical Field

The invention relates to the technical field of medical instruments, and in particular to a multifunctional medical bone drill.

Background Art

In orthopedic clinical surgery, bone drills are commonly used instruments in craniotomy, drilling and other surgeries. Because different surgeries require bone drills with different speeds and torques, doctors need to prepare multiple sets of bone drills for various applications during clinical surgery, causing unnecessary trouble.

Summary of the invention

The technical problem to be solved by the present invention is to provide a multifunctional medical bone drill, which can reduce the diameter of the motor output shaft and effectively solve the contradiction between small volume and large output torque; adopt oil seal as dynamic sealing structure, increase effective sealing structure, can block blood and water from entering the inside of the bone drill body, will not cause pollution inside the bone drill body, and can effectively extend the service life of the tool; three drill bits with different structures are provided, which are suitable for different surgical needs, and have the advantage of one bone drill suitable for multiple uses; simple structure, small volume, reduced weight of moving parts, sufficient power, and reduced reactive loss as much as possible, thereby reducing working current and extending the use time, so as to solve the defects caused by the prior art.

In order to solve the above technical problems, the present invention provides the following technical solutions: a multifunctional medical bone drill, comprising a bone drill body and a drill bit, wherein the drill bit is connected to the bone drill body, wherein the bone drill body comprises a control device, a housing, a handle, a motor, and a transmission device, wherein the handle is fixedly connected to the bottom of the housing, the transmission device is arranged inside the housing, the motor is arranged inside the handle, a gear set connected to the transmission device is arranged on the top of the motor, a rear cap connected to the housing is arranged at one end of the transmission device close to the gear set, a connecting groove connected to the drill bit is arranged at the other end of the transmission device, a connecting spindle matching the connecting slot is arranged on the drill bit, a tail sleeve connected to the housing is sleeved on the connecting spindle, and a locking device connected to the tail sleeve is arranged at one end of the housing away from the rear cap;

The locking device includes an inner sleeve cap, a positioning pin, a knob, and a casing cap. The knob is sleeved on the transmission device. An inner sleeve sleeved on the transmission device is provided between the knob and the transmission device. The two ends of the inner sleeve are respectively connected to the inner sleeve cap and the casing. The casing cap is sleeved on one end of the inner sleeve close to the casing. The positioning pin is connected to the inner sleeve. A positioning groove matching and connecting the positioning pin is provided on the tail sleeve.

The above-mentioned multifunctional medical bone drill, wherein the control device comprises a controller, a control panel and a speed regulating device, the control panel is arranged inside the handle, the controller and the speed regulating device are respectively connected to the handle, the controller and the speed regulating device are respectively controlled to be connected to the control panel, and the control panel is controlled to be connected to the motor;

The controller includes a control button and a magnetic steel and a button spring arranged inside the control button, wherein the magnetic steel is arranged on the upper side of the button spring, and a button seat connected to the handle is provided on the control button;

The control board is provided with a Hall element sensor that matches the magnetic steel and the speed regulating device.

The above-mentioned multifunctional medical bone drill, wherein a gearbox is provided inside the motor, a gear box connected to the gear group is provided on the top of the motor, the gear group includes a motor bevel gear connected to the gear box, and a transmission bevel gear connected to the transmission device, the motor bevel gear is connected to the transmission bevel gear, and both the motor bevel gear and the transmission bevel gear are provided with A-type flat keys.

The above-mentioned multifunctional medical bone drill, wherein the transmission device includes a transmission main shaft, a first deep groove ball bearing, the first deep groove ball bearing is sleeved on one end of the transmission main shaft near the connecting groove, the transmission bevel gear is sleeved on one end of the transmission main shaft near the rear assembly cap, a shaft sleeve sleeved on the main shaft is provided between the first deep groove ball bearing and the transmission bevel gear, a second deep groove ball bearing sleeved on the transmission main shaft is provided between the transmission bevel gear and the rear assembly cap, and a first oil seal sleeved on the transmission main shaft is provided between the rear assembly cap and the transmission main shaft;

The connecting groove is arranged at an end of the transmission main shaft away from the rear assembling cap.

The above-mentioned multifunctional medical bone drill, wherein the positioning pin includes a guide pin shaft and a locking pin shaft, the guide pin shaft is provided with a positioning pin seat connected to the inner sleeve and a torsion spring connected to the locking pin shaft, the positioning pin seat is arranged between the inner sleeve and the knob, the torsion spring is sleeved on the inner sleeve, and the guide pin shaft is arranged at one end near the inner sleeve cap;

The inner sleeve is sleeved on one end of the transmission main shaft where the connecting groove is provided.

The above-mentioned multifunctional medical bone drill, wherein the guide pin and the locking pin both pass through the inner sleeve and extend to the transmission main shaft to the side away from the knob; two consistent guide pins and two consistent locking pins are arranged inside the knob.

The above-mentioned multifunctional medical bone drill, wherein the positioning groove comprises a positioning straight groove and a positioning oblique groove arranged on the tail sleeve, the tail sleeve is symmetrically provided with two identical positioning straight grooves, each of the positioning straight grooves is connected with the positioning oblique groove, and the opening directions of the two positioning oblique grooves are opposite;

The positioning straight groove is matched and connected with the guide pin shaft, and the positioning oblique groove is matched and connected with the locking pin shaft.

The above-mentioned multifunctional medical bone drill, wherein the drill bit includes a drill chuck and a first front cover, one end of the connecting spindle is connected to the drill chuck, the other end of the connecting spindle passes through the tail sleeve and is connected to the connecting groove, the first front cover is arranged between the drill chuck and the tail sleeve, and the tail sleeve is provided with a third deep groove ball bearing connected to the connecting spindle, a first bearing washer and an elastic retaining ring for the shaft inside, the elastic retaining ring for the shaft is arranged between the first front cover and the third deep groove ball bearing, and the end of the tail sleeve facing away from the positioning groove is provided with a marking ring connected to the first front cover.

The multifunctional medical bone drill mentioned above, wherein the drill bit comprises a drill chuck and an output shaft, the two ends of the output shaft are respectively connected to the drill chuck and the connecting spindle, one end of the connecting spindle partially penetrates into the output shaft, a sealing gasket is provided on the outer sleeve of the connecting spindle that penetrates into the output shaft, and the other end of the connecting spindle passes through the tail sleeve and is connected to the connecting groove;

The outer sleeve of the output shaft is provided with a front sleeve connected to the tail sleeve, the end of the tail sleeve away from the positioning groove is connected to the front sleeve, the end of the front sleeve away from the tail sleeve is connected to a second front cover, a marking ring is provided between the second front cover and the front sleeve, and a second oil seal sleeved on the output shaft is provided inside the front cover;

A fourth deep groove ball bearing is provided between the output shaft and the front sleeve, a fifth deep groove ball bearing is provided between the connecting main shaft and the tail sleeve, a central gear connected to the output shaft is provided on the connecting main shaft, and a needle roller, a planetary gear, and an internal gear are provided on the top of the central gear in order from bottom to top;

A friction plate sleeved on the connecting main shaft is provided between the central gear and the fifth deep groove ball bearing.

The above-mentioned multifunctional medical bone drill, wherein the drill bit includes a shell, a pressure rod, and a locking piece, the locking piece includes a locking sleeve and a locking chuck and a locking wheel arranged inside the locking sleeve, the shell is sleeved on the locking sleeve, the locking chuck and the locking wheel are arranged at the same end of the locking sleeve, the locking chuck is arranged on the inner wall of the locking sleeve, and the inner wall of the locking chuck is provided with three consistent locking wheels, the other end of the locking sleeve partially probes into the connecting spindle, the end of the connecting spindle facing away from the locking sleeve is connected to the connecting groove, the tail sleeve is sleeved on the connecting spindle, and the end of the tail sleeve facing away from the positioning groove is fixedly connected to the shell, the other end of the shell is provided with a third front cover for fixing the locking sleeve, a third oil seal is arranged inside the third front cover, a second bearing washer sleeved on the locking sleeve is arranged between the third oil seal and the shell, and a marking ring is arranged between the third front cover and the shell;

The housing is provided with a sliding bearing seat sleeved on the locking sleeve, a sixth deep groove ball bearing, and a spring, the locking sleeve is sleeved with a spring washer connected to the spring, a shaft elastic retaining ring sleeved on the locking sleeve is provided between the spring washer and the sixth deep groove ball bearing, a portion of the spring is sleeved on the connecting spindle, a hole elastic retaining ring connected to the spring is sleeved on the connecting spindle, a seventh deep groove ball bearing sleeved on the connecting spindle is provided inside the tail sleeve, and a third bearing washer sleeved on the connecting spindle is provided between the hole elastic retaining ring and the seventh deep groove ball bearing;

The bottom of the housing is provided with a fixing seat connected to the pressure rod, a portion of the pressure rod is inserted into the housing and sleeved on the locking sleeve, and the top of the pressure rod is matched and connected to the sliding bearing seat;

The locking sleeve partially protrudes out of the third front cover at one end close to the third front cover.

The technical solution provided by the multifunctional medical bone drill according to the present invention has the following effects: the present invention places the motor vertically in the handle, which can reduce the diameter of the motor output shaft and effectively solve the contradiction between small volume and large output torque; an oil seal is used as a dynamic sealing structure to increase an effective sealing structure, which can block blood and water from entering the inside of the bone drill body, and will not cause pollution inside the bone drill body, which can effectively extend the service life of the tool; three drill bits with different structures are provided, which are suitable for different surgical needs, and have the advantage of one bone drill being suitable for multiple uses; the structure is simple, the volume is small, the weight of the moving parts is reduced, the power is sufficient, and the reactive loss is reduced as much as possible, thereby reducing the working current and extending the use time.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a bone drill body in a multifunctional medical bone drill of the present invention;

FIG2 is a schematic diagram of the structure of a controller in a multifunctional medical bone drill of the present invention;

FIG3 is a schematic structural diagram of a tail sleeve in a multifunctional medical bone drill according to the present invention;

FIG4 is a schematic structural diagram of a first embodiment of a multifunctional medical bone drill according to the present invention;

FIG5 is a schematic structural diagram of a second embodiment of a multifunctional medical bone drill according to the present invention;

FIG. 6 is a schematic structural diagram of a third embodiment of a multifunctional medical bone drill according to the present invention.

Among them, the figure numbers are as follows: bone drill body 101, casing 102, handle 103, motor 104, rear cap 105, connecting groove 106, inner sleeve cap 107, guide pin 108, locking pin 109, knob 110, casing cap 111, inner sleeve 112, controller 113, control board 114, speed regulating device 115, gear box 116, motor bevel gear 117, transmission bevel gear 118, A-type flat key 119, transmission spindle 120, first deep groove ball bearing 121, sleeve 122, second deep groove ball bearing 123, first oil seal 124, locating pin seat 125, torsion spring 126, control button 201, magnetic steel 202, button spring 203, button seat 204, tail sleeve 301, positioning straight groove 302, positioning oblique groove 303, drill bit 401, connecting spindle 402, drill chuck 403, first front cover 404, third deep groove ball bearing 405, first bearing washer 406, elastic circlip for shaft 407, marking ring 408, output shaft 501, sealing gasket 502, front sleeve 503, second front cover 504, second oil seal 505, fourth deep groove ball bearing 506, fifth deep groove ball bearing 507, central gear 508, needle roller 509, planetary gear 510, internal gear 511, friction plate 512, housing 601, pressure rod 602, locking sleeve 603, locking chuck 604, locking wheel 605, third front cover 606, third oil seal 607, second bearing washer 608, sliding bearing seat 609, sixth deep groove ball bearing 610, spring 611, spring washer 612, elastic circlip for hole 613, seventh deep groove ball bearing 614, third bearing washer 615, fixing seat 616.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects of the invention easy to understand, the present invention is further explained below with reference to specific illustrations.

The first embodiment of the present invention provides a multifunctional medical bone drill, the purpose of which is to reduce the diameter of the motor output shaft and effectively solve the contradiction between small volume and large output torque; an oil seal is used as a dynamic sealing structure to increase an effective sealing structure, which can block blood and water from entering the inside of the bone drill body, will not cause pollution inside the bone drill body, and can effectively extend the service life of the tool; three drill bits with different structures are provided, which are suitable for different surgical needs, and have the advantage of one bone drill being suitable for multiple uses; the structure is simple, the volume is small, the weight of the moving parts is reduced, the power is sufficient, and the reactive loss is reduced as much as possible, thereby reducing the working current and extending the use time.

As shown in FIG1 , a multifunctional medical bone drill comprises a bone drill body 101 and a drill bit 401, wherein the drill bit 401 is connected to the bone drill body 101, wherein the bone drill body 101 comprises a control device, a housing 102, a handle 103, a motor 104, and a transmission device, wherein the handle 103 is fixedly connected to the bottom of the housing 102, the transmission device is arranged inside the housing 102, the motor 104 is arranged inside the handle 103, a gear set connected to the transmission device is arranged on the top of the motor 104, a rear cap 105 connected to the housing 102 is arranged at one end of the transmission device near the gear set, a connecting groove 106 connected to the drill bit 401 is arranged at the other end of the transmission device, a connecting spindle 402 matching the connecting groove 106 is arranged on the drill bit 401, a tail sleeve 301 connected to the housing 102 is sleeved on the connecting spindle 402, and a locking device connected to the tail sleeve 301 is arranged at one end of the housing 102 away from the rear cap 105;

The locking device includes an inner sleeve cap 107, a positioning pin, a knob 110, and a casing cap 111. The knob 110 is sleeved on the transmission device. An inner sleeve 112 sleeved on the transmission device is provided between the knob 110 and the transmission device. The two ends of the inner sleeve 112 are respectively connected to the inner sleeve cap 107 and the casing 102. The casing cap 111 is sleeved on one end of the inner sleeve 112 near the casing 102. The positioning pin is connected to the inner sleeve 112. A positioning groove matching the positioning pin is provided on the tail sleeve 301.

As shown in FIG2 , a multifunctional medical bone drill provided in this embodiment uses a control device including a controller 113, a control board 114 and a speed regulating device 115. The control board 114 is arranged inside the handle 103. The controller 113 and the speed regulating device 115 are respectively connected to the handle 103. The controller 113 and the speed regulating device 115 are respectively controlled to connect to the control board 114. The control board 114 controls the connection to the motor 104.

The controller 113 includes a control button 201 and a magnet 202 and a button spring 203 disposed inside the control button 201. The magnet 202 is disposed on the upper side of the button spring 203. The control button 201 is provided with a button seat 204 connected to the handle 103.

The control panel 114 is provided with a Hall element sensor that matches the magnet 202 and the speed regulating device 115. When in use, the control button 201 is controlled to control the magnet 202 and the Hall element sensor to adjust the speed of the motor 104. The regulating device can adjust the maximum speed of the motor 104. The regulating device is adjusted as needed to prevent the motor 104 from rotating too fast when a low speed is required, thereby preventing danger.

A multifunctional medical bone drill provided in the present embodiment adopts a motor 104 with a gearbox provided inside, and a gearbox 116 connected to a gear set is provided on the top of the motor 104, the gear set includes a motor bevel gear 117 connected to the gearbox 116, and a transmission bevel gear 118 connected to the transmission device, the motor bevel gear 117 is connected to the transmission bevel gear 118, and the motor bevel gear 117 and the transmission bevel gear 118 are both provided with an A-type flat key 119, and the gearbox and the motor 104 are integrated into one, so that the output of the high-speed motor 104 can be directly reduced to the rotation speed required by the medical bone drill, thereby improving the use efficiency, and the integrated gearbox and motor 104 can effectively reduce the volume of the motor 104, making the medical bone drill more convenient to use, and when in use, the motor 104 drives the gearbox 116 to rotate, and the gearbox 116 drives the motor bevel gear 117 to rotate and then drives the transmission bevel gear 118 to rotate, directly converting the vertical rotation speed into the horizontal rotation speed, thereby improving the work efficiency during use.

A multifunctional medical bone drill provided in this embodiment, the transmission device used includes a transmission main shaft 120, a first deep groove ball bearing 121, the first deep groove ball bearing 121 is sleeved on one end of the transmission main shaft 120 near the connecting groove 106, a transmission bevel gear 118 is sleeved on one end of the transmission main shaft 120 near the rear assembly cap 105, a sleeve 122 sleeved on the main shaft is provided between the first deep groove ball bearing 121 and the transmission bevel gear 118, a second deep groove ball bearing 123 sleeved on the transmission main shaft 120 is provided between the transmission bevel gear 118 and the rear assembly cap 105, and a first oil seal 124 sleeved on the transmission main shaft 120 is provided between the rear assembly cap 105 and the transmission main shaft 120;

The connecting groove 106 is arranged at one end of the transmission main shaft 120 away from the rear cap 105. When in use, the transmission bevel gear 118 drives the transmission main shaft 120 to rotate. The connecting groove 106 at the output end of the transmission main shaft 120 is an inner hexagonal hole, and the connecting main shaft 402 connected to the inner hexagonal hole is an outer hexagonal shaft, which can transmit the torque output by the motor 104 to the drill bit 401. The connection is convenient and easy to drive.

The multifunctional medical bone drill provided in this embodiment adopts a positioning pin including a guide pin shaft 108 and a locking pin shaft 109. The guide pin shaft 108 is provided with a positioning pin seat 125 connected to the inner sleeve 112 and a torsion spring 126 connected to the locking pin shaft 109. The positioning pin seat 125 is arranged between the inner sleeve 112 and the knob 110. The torsion spring 126 is sleeved on the inner sleeve 112. The guide pin shaft 108 is arranged at one end near the inner sleeve cap 107.

The inner sleeve 112 is sleeved on one end of the transmission main shaft 120 where the connecting groove 106 is provided.

The present embodiment provides a multifunctional medical bone drill, in which the guide pin 108 and the locking pin 109 are both extended through the inner sleeve 112 to the side away from the knob 110 to the transmission main shaft 120; two consistent guide pins 108 and two consistent locking pins 109 are arranged inside the knob 110. When in use, when the drill bit 401 is connected to the bone drill body 101, the tail sleeve 301 is inserted between the inner sleeve 112 and the transmission main shaft 120, and the positioning straight groove 302 is connected to the guide pin 108. When the tail sleeve 301 is completely inserted into the interior of the cobalt drill body, the torsion spring 126 drives the locking pin 109 to slide into the positioning inclined groove 303 to achieve a locking effect to prevent shaking. At this time, the connecting main shaft 402 is matched and connected with the transmission main shaft 120.

As shown in FIG3 , a multifunctional medical bone drill provided in this embodiment uses a positioning groove including a positioning straight groove 302 and a positioning oblique groove 303 provided on a tail sleeve 301. Two identical positioning straight grooves 302 are symmetrically provided on the tail sleeve 301. Each positioning straight groove 302 is connected to a positioning oblique groove 303. The opening directions of the two positioning oblique grooves 303 are opposite.

The positioning straight groove 302 is matched and connected with the guide pin shaft 108 , and the positioning oblique groove 303 is matched and connected with the locking pin shaft 109 .

As shown in FIG4 , a multifunctional medical bone drill provided in this embodiment uses a drill bit 401 including a drill chuck 403 and a first front cover 404. One end of the connecting spindle 402 is connected to the drill chuck 403, and the other end of the connecting spindle 402 passes through the tail sleeve 301 and is connected to the connecting groove 106. The first front cover 404 is arranged between the drill chuck 403 and the tail sleeve 301. The tail sleeve 301 is provided with a third deep groove ball bearing 405 connected to the connecting spindle 402, a first bearing washer 406 and a shaft elastic retaining ring 407. The shaft elastic retaining ring 407 It is arranged between the first front cover 404 and the third deep groove ball bearing 405, and an end of the tail sleeve 301 away from the positioning groove is provided with a marking ring 408 connected to the first front cover 404. When in use, the drill needle to be used is fixed on the drill chuck 403 through the drill chuck 403. The drill bit 401 provided in this embodiment is a high-speed drill. The two ends of the connecting spindle 402 are directly connected to the chuck and the transmission spindle 120. The transmission spindle 120 directly drives the connecting spindle 402 and then drives the drill chuck 403. It has a compact structure and high working efficiency.

Second embodiment:

As shown in FIG5 , the present embodiment is different from the first embodiment in that the present embodiment provides a multifunctional medical bone drill, wherein the drill bit 401 used comprises a drill chuck 403 and an output shaft 501, and both ends of the output shaft 501 are respectively connected to the drill chuck 403 and the connecting spindle 402, one end of the connecting spindle 402 partially penetrates into the output shaft 501, and a sealing gasket 502 is provided on the outer sleeve of the connecting spindle 402 that penetrates into the output shaft 501, and the other end of the connecting spindle 402 passes through the tail sleeve 301 and is connected to the connecting groove 106;

The outer sleeve of the output shaft 501 is provided with a front sleeve 503 connected to the tail sleeve 301, the end of the tail sleeve 301 away from the positioning groove is connected to the front sleeve 503, the end of the front sleeve 503 away from the tail sleeve 301 is connected with a second front cover 504, a marking ring is provided between the second front cover 504 and the front sleeve 503, and a second oil seal 505 sleeved on the output shaft 501 is provided inside the front cover;

A fourth deep groove ball bearing 506 is provided between the output shaft 501 and the front sleeve 503, a fifth deep groove ball bearing 507 is provided between the connecting main shaft 402 and the tail sleeve 301, a central gear 508 connected to the output shaft 501 is sleeved on the connecting main shaft 402, and a needle roller 509, a planetary gear 510, and an internal gear 511 are provided on the top of the central gear 508 in order from bottom to top;

A friction plate 512 is provided between the central gear 508 and the fifth deep groove ball bearing 507 and is sleeved on the connecting spindle 402. The drill bit 401 provided in this embodiment is a low-speed drill bit 401. When in use, the drill needle to be used is fixed on the drill chuck 403 through the drill chuck 403. The transmission spindle 120 drives the connecting spindle 402 and then drives the transmission shaft. The central gear 508 and the planetary gear 510 arranged between the connecting spindle 402 and the transmission shaft have a deceleration effect, thereby increasing the output torque and reducing the rotation speed.

Third embodiment:

As shown in FIG6 , different from the first embodiment, the present embodiment provides a multifunctional medical bone drill, wherein the drill bit 401 used comprises a housing 601, a pressure rod 602, and a locking member, wherein the locking member comprises a locking sleeve 603 and a locking chuck 604 and a locking wheel 605 arranged inside the locking sleeve 603, wherein the housing 601 is sleeved on the locking sleeve 603, the locking chuck 604 and the locking wheel 605 are arranged at the same end of the locking sleeve 603, the locking chuck 604 is arranged on the inner wall of the locking sleeve 603, the inner wall of the locking chuck 604 is provided with three identical locking wheels 605, and the locking sleeve 603 is provided with a plurality of locking wheels 605. The other end partially protrudes into the connecting main shaft 402, and the end of the connecting main shaft 402 away from the locking sleeve 603 is connected to the connecting groove 106. The tail sleeve 301 is sleeved on the connecting main shaft 402, and the end of the tail sleeve 301 away from the positioning groove is fixedly connected to the housing 601. The other end of the housing 601 is provided with a third front cover 606 for fixing the locking sleeve 603, and a third oil seal 607 is provided inside the third front cover 606. A second bearing washer 608 sleeved on the locking sleeve 603 is provided between the third oil seal 607 and the housing 601, and a marking ring 408 is provided between the third front cover 606 and the housing 601;

The housing 601 is provided with a sliding bearing seat 609 sleeved on the locking sleeve 603, a sixth deep groove ball bearing 610, and a spring 611. The locking sleeve 603 is sleeved with a spring washer 612 connected to the spring 611. A shaft elastic circlip 407 sleeved on the locking sleeve 603 is provided between the spring washer 612 and the sixth deep groove ball bearing 610. The spring 611 is partially sleeved on the connecting spindle 402. The connecting spindle 402 is sleeved with a hole elastic circlip 613 connected to the spring 611. The tail sleeve 301 is provided with a seventh deep groove ball bearing 614 sleeved on the connecting spindle 402. A third bearing washer 615 sleeved on the connecting spindle 402 is provided between the hole elastic circlip 613 and the seventh deep groove ball bearing 614.

The bottom of the housing 601 is provided with a fixing seat 616 connected to the pressure rod 602. The pressure rod 602 partially extends into the housing 601 and is sleeved on the locking sleeve 603. The top of the pressure rod 602 is matched and connected to the sliding bearing seat 609.

The locking sleeve 603 partially protrudes out of the third front cover 606 at one end near the third front cover 606. The structure of this embodiment is a Kirschner wire drill. When in use, the locking piece used can be locked and loosened under the drive of the pressure rod 602. When the pressure rod 602 is pulled to insert the Kirschner wire into the locking piece, three consistent locking wheels 605 are loosened at the same time, so that 0.8 mm-3.5 mm Kirschner wires can be inserted, thereby improving the selection of Kirschner wires. Since the contact part between the locking wheel 605 and the Kirschner wire is changed from a circle to a square, the contact between the locking wheel 605 and the Kirschner wire can be changed from a point contact to a line contact, thereby increasing the clamping area, improving the clamping stability and the concentricity of the drill bit 401.

In summary, the multifunctional medical bone drill of the present invention can reduce the diameter of the motor output shaft, effectively solving the contradiction between small volume and large output torque; adopting oil seal as the dynamic sealing structure, increasing the effective sealing structure, can block blood and water from entering the bone drill body, will not cause pollution inside the bone drill body, and can effectively extend the service life of the tool; three drill bits with different structures are provided, which are suitable for different surgical needs, and have the advantage of one bone drill being adaptable to multiple uses; simple structure, small volume, reduced weight of moving parts, sufficient power, and reduced reactive power loss as much as possible, thereby reducing working current and extending the use time.

The above describes the specific embodiments of the invention. It should be understood that the invention is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; those skilled in the art can make various modifications or modifications within the scope of the claims, and make some simple deductions, deformations or substitutions, which does not affect the essence of the invention.

Claims (7)

1. The multifunctional medical bone drill is characterized in that the bone drill body comprises a control device, a shell, a handle, a motor and a transmission device, the handle is fixedly connected to the bottom of the shell, the transmission device is arranged in the shell, the motor is arranged in the handle, the top of the motor is provided with a gear set connected with the transmission device, one end, close to the gear set, of the transmission device is provided with a back splicing cap connected with the shell, the other end of the transmission device is provided with a connecting groove connected with the drill, the drill is provided with a connecting spindle which is connected with the connecting groove in a matched mode, the connecting spindle is sleeved with a tail sleeve connected with the shell, and one end, deviating from the back splicing cap, of the shell is provided with a locking device connected with the tail sleeve; the locking device comprises an inner sleeve splicing cap, a positioning pin, a knob and a shell splicing cap, wherein the knob is sleeved on the transmission device, an inner sleeve sleeved on the transmission device is arranged between the knob and the transmission device, two ends of the inner sleeve are respectively connected with the inner sleeve splicing cap and the shell, the shell splicing cap is sleeved on one end of the inner sleeve, which is close to the shell, the positioning pin is connected with the inner sleeve, and a positioning groove matched with the positioning pin is formed in the tail sleeve;

The control device comprises a controller, a control board and a speed regulating device, wherein the control board is arranged in the handle, the controller and the speed regulating device are respectively connected with the control board in a control way, and the control board is connected with the motor in a control way; the controller comprises a control button, and magnetic steel and a button spring which are arranged in the control button, wherein the magnetic steel is arranged on the upper side of the button spring, and a button seat connected with the handle is arranged on the control button; the control panel is provided with a Hall element sensor matched with the magnetic steel and the speed regulating device;

The inside of the motor is provided with a gearbox, the top of the motor is provided with a gear box connected with the gear box, the gear box comprises a motor bevel gear connected with the gear box and a transmission bevel gear connected with the transmission device, the motor bevel gear is connected with the transmission bevel gear, and A-shaped flat keys are arranged on the motor bevel gear and the transmission bevel gear;

The transmission device comprises a transmission main shaft and a first deep groove ball bearing, wherein the first deep groove ball bearing is sleeved at one end, close to the connecting groove, of the transmission main shaft, the transmission bevel gear is sleeved at one end, close to the rear assembly cap, of the transmission main shaft, a shaft sleeve sleeved at the main shaft is arranged between the first deep groove ball bearing and the transmission bevel gear, a second deep groove ball bearing sleeved at the transmission main shaft is arranged between the transmission bevel gear and the rear assembly cap, and a first oil seal sleeved at the transmission main shaft is arranged between the rear assembly cap and the transmission main shaft; the connecting groove is arranged at one end of the transmission main shaft, which is far away from the rear spliced cap.

2. The multifunctional medical bone drill according to claim 1, wherein the positioning pin comprises a guide pin shaft and a locking pin shaft, a positioning pin seat connected with the inner sleeve and a torsion spring connected with the locking pin shaft are arranged on the guide pin shaft, the positioning pin seat is arranged between the inner sleeve and the knob, the torsion spring is sleeved on the inner sleeve, and the guide pin shaft is arranged near one end of the inner sleeve splicing cap; the inner sleeve is sleeved at one end of the transmission main shaft, which is provided with the connecting groove.

3. The multifunctional medical bone drill according to claim 2, wherein the guide pin shaft and the locking pin shaft extend to the transmission main shaft from one side of the knob to the other side of the knob; two identical guide pin shafts and two identical locking pin shafts are arranged in the knob.

4. The multifunctional medical bone drill according to claim 3, wherein the positioning groove comprises a positioning straight groove and a positioning chute which are arranged on the tail sleeve, two identical positioning straight grooves are symmetrically arranged on the tail sleeve, the positioning chute is connected to each positioning straight groove, and the opening directions of the two positioning chute are opposite; the positioning straight groove is connected with the guide pin shaft in a matching way, and the positioning chute is connected with the locking pin shaft in a matching way.

5. The multifunctional medical bone drill according to claim 4, wherein the drill bit comprises a drill chuck and a first front cover, one end of the connecting spindle is connected to the drill chuck, the other end of the connecting spindle penetrates through the tail sleeve and is connected with the connecting groove, the first front cover is arranged between the drill chuck and the tail sleeve, a third deep groove ball bearing, a first bearing gasket and a shaft circlip which are connected with the connecting spindle are arranged in the tail sleeve, the shaft circlip is arranged between the first front cover and the third deep groove ball bearing, and one end of the tail sleeve, which is away from the positioning groove, is provided with a marking ring connected with the first front cover.

6. The multifunctional medical bone drill according to claim 4, wherein the drill bit comprises a drill chuck and an output shaft, two ends of the output shaft are respectively connected with the drill chuck and the connecting main shaft, one end of the connecting main shaft partially extends into the output shaft, a sealing gasket is sleeved on the periphery of the connecting main shaft extending into the output shaft, and the other end of the connecting main shaft penetrates through the tail sleeve and is connected with the connecting groove; the periphery of the output shaft is sleeved with a front sleeve connected with the tail sleeve, one end of the tail sleeve, which is away from the positioning groove, is connected with the front sleeve, one end of the front sleeve, which is away from the tail sleeve, is connected with a second front cover, a mark ring is arranged between the second front cover and the front sleeve, and a second oil seal sleeved on the output shaft is arranged inside the front cover; a fourth deep groove ball bearing is arranged between the output shaft and the front sleeve, a fifth deep groove ball bearing is arranged between the connecting main shaft and the tail sleeve, a central gear connected with the output shaft is sleeved on the connecting main shaft, and a needle roller, a planetary gear and an internal gear are sequentially arranged at the top of the central gear from bottom to top; and a friction plate sleeved on the connecting main shaft is arranged between the central gear and the fifth deep groove ball bearing.

7. The multifunctional medical bone drill according to claim 4, wherein the drill bit comprises a shell, a compression bar and a locking piece, the locking piece comprises a locking sleeve, a locking chuck and a locking wheel, the locking chuck and the locking wheel are arranged in the locking sleeve, the shell is sleeved on the locking sleeve, the locking chuck and the locking wheel are arranged at the same end of the locking sleeve, the locking chuck is arranged on the inner wall of the locking sleeve, three consistent locking wheels are arranged on the inner wall of the locking chuck, the other end of the locking sleeve partially extends into the connecting main shaft, one end of the connecting main shaft, which is far away from the locking sleeve, is connected with the connecting groove, the tail sleeve is sleeved on the connecting main shaft, one end of the tail sleeve, which is far away from the positioning groove, is fixedly connected with the shell, a third front cover for fixing the locking sleeve is arranged at the other end of the shell, a third oil seal is arranged in the third front cover, a second bearing gasket sleeved on the locking sleeve is arranged between the third oil seal and the shell, and a ring is arranged between the third front cover and the shell; the shell is internally provided with a sliding bearing seat, a sixth deep groove ball bearing and a spring which are sleeved on the locking sleeve, the locking sleeve is sleeved with a spring washer connected with the spring, a shaft elastic check ring sleeved on the locking sleeve is arranged between the spring washer and the sixth deep groove ball bearing, the spring is partially sleeved on the connecting main shaft, the connecting main shaft is sleeved with a hole elastic check ring connected with the spring, the tail sleeve is internally provided with a seventh deep groove ball bearing sleeved on the connecting main shaft, and a third bearing washer sleeved on the connecting main shaft is arranged between the hole elastic check ring and the seventh deep groove ball bearing; the bottom of the shell is provided with a fixed seat connected with the pressure rod, part of the pressure rod extends into the shell and is sleeved on the locking sleeve, and the top of the pressure rod is connected with the sliding bearing seat in a matching way; the locking sleeve is provided with a part extending out of the third front cover at one end close to the third front cover.