CN209984258U

CN209984258U - Multifunctional medical bone drill

Info

Publication number: CN209984258U
Application number: CN201821807784.9U
Authority: CN
Inventors: 王浩; 王熙迥; 曲人晶
Original assignee: SHANGHAI BOJIN MEDICAL DEVICES Co Ltd
Current assignee: SHANGHAI BOJIN MEDICAL DEVICES Co Ltd
Priority date: 2017-12-20
Filing date: 2018-11-05
Publication date: 2020-01-24
Anticipated expiration: 2028-11-05

Abstract

The utility model discloses a multifunctional medical bone drill, including the bone drill body and the drill bit of connection, the bone drill body includes controlling means, casing, handle, motor, transmission, handle fixed connection is in the bottom of casing, transmission sets up in the inside of casing, the motor sets up in the inside of handle, the top of motor is equipped with the gear train of connecting transmission, the one end of the nearly gear train of transmission is equipped with the back piece cap of connecting the casing, the other end is equipped with the spread groove of connecting the drill bit, be equipped with the connection main shaft of matching connection spread groove on the drill bit, the cover is equipped with the tail cover of connecting the casing on the connection main shaft, be equipped with the locking device of connecting the tail cover on the casing; the locking device comprises an inner sleeve splicing cap, a positioning pin, a knob and a machine shell splicing cap, wherein the knob is sleeved on the transmission device, the inner sleeve is arranged between the knob and the transmission device, the inner sleeve is respectively connected with the inner sleeve splicing cap and the machine shell, the machine shell splicing cap is sleeved at one end, close to the machine shell, of the inner sleeve, the positioning pin is connected with the inner sleeve, and a positioning groove matched with the positioning pin is formed in the tail sleeve.

Description

Multifunctional medical bone drill

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to multi-functional medical bone drill.

Background

In the clinical operation of orthopedics, the bone drill is the common apparatus in operations such as craniotomy, drilling, because the bone drill of different rotational speeds and different torques are required in different operations, therefore the doctor needs to prepare many sets of bone drill in clinical operation for various different applications, causing unnecessary trouble.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a multifunctional medical bone drill which can reduce the diameter of the output shaft of a motor and effectively solve the contradiction of small volume and large output torque; the oil seal is used as a dynamic sealing structure, an effective sealing structure is added, blood water can be prevented from entering the bone drill body, the pollution to the interior of the bone drill body can not be caused, and the service life of the tool can be effectively prolonged; the three drill bits with different structures are arranged, so that the bone drill is suitable for the conditions of different operation requirements, and has the advantage that one bone drill is suitable for multiple purposes; the structure is simple, the size is small, the weight of a moving part is reduced, the power is sufficient, and the reactive loss is reduced as much as possible, so that the working current is reduced, the service life is prolonged, and the defects caused by the prior art are overcome.

In order to solve the technical problem, the utility model provides a following technical scheme: a multifunctional medical bone drill, which comprises a bone drill body and a drill bit, wherein the drill bit is connected with the bone drill body, wherein the bone drill body comprises a control device, a casing, a handle, a motor and a transmission device, the handle is fixedly connected with the bottom of the casing, the transmission device is arranged inside the shell, the motor is arranged inside the handle, the top of the motor is provided with a gear set connected with the transmission device, one end of the transmission device close to the gear set is provided with a rear splicing cap connected with the shell, the other end of the transmission device is provided with a connecting groove connected with the drill bit, the drill bit is provided with a connecting main shaft connected with the connecting groove in a matching way, a tail sleeve connected with the shell is sleeved on the connecting main shaft, and a locking device connected with the tail sleeve is arranged at one end of the shell, which is far away from the rear splicing cap;

the locking device comprises an inner sleeve splicing cap, a positioning pin, a knob and a casing splicing cap, wherein the knob is sleeved on the transmission device, a sleeve is arranged between the knob and the transmission device and is arranged on the inner sleeve of the transmission device, two ends of the inner sleeve are respectively spliced with the inner sleeve splicing cap and the casing and connected, the casing splicing cap is sleeved on one end, close to the casing, of the inner sleeve, the positioning pin is connected with the inner sleeve, and a positioning groove matched and connected with the positioning pin is formed in the tail sleeve.

The multifunctional medical bone drill comprises a control device, a control panel and a speed regulating device, wherein the control panel is arranged inside the handle, the control device and the speed regulating device are respectively connected to the handle, the control device and the speed regulating device are respectively in control connection with the control panel, and the control panel is in control connection with the motor;

the controller comprises a control button, and a 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;

and a Hall element sensor matched with the magnetic steel and the speed regulating device is arranged on the control panel.

The multifunctional medical bone drill is characterized in that a gearbox is arranged inside the motor, the top of the motor is provided with a gear box connected with the gear set, the gear set 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 multifunctional medical bone drill 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, a transmission bevel gear is sleeved at one end, close to the rear splicing cap, of the transmission main shaft, a shaft sleeve sleeved on the main shaft is arranged 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 arranged between the transmission bevel gear and the rear splicing cap, and a first oil seal sleeved on the transmission main shaft is arranged between the rear splicing cap and the transmission main shaft;

the connecting groove is arranged at one end, deviating from the rear splicing cap, of the transmission main shaft.

The multifunctional medical bone drill comprises a positioning pin, a positioning pin seat, a torsion spring, a nut, a knob and a positioning pin seat, wherein the positioning pin comprises a guiding pin shaft and a locking pin shaft, the guiding pin shaft is provided with the positioning pin seat connected with the inner sleeve and the torsion spring connected with 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 guiding pin shaft is arranged at one end close to 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.

In the above multifunctional medical bone drill, the guide pin shaft and the locking pin shaft both penetrate through the inner sleeve and extend to the transmission main shaft to the side deviating from the knob; two consistent guide pin shafts and two consistent locking pin shafts are arranged inside the knob.

The positioning groove comprises a positioning straight groove and a positioning inclined groove which are arranged on the tail sleeve, two consistent positioning straight grooves are symmetrically arranged on the tail sleeve, each positioning straight groove is connected with the corresponding positioning inclined groove, and the opening directions of the two positioning inclined grooves are opposite;

the positioning straight groove is connected with the guide pin shaft in a matching mode, and the positioning inclined groove is connected with the locking pin shaft in a matching mode.

The multifunctional medical bone drill comprises a drill chuck and a first front cover, wherein one end of a connecting main shaft is connected to the drill chuck, the other end of the connecting main shaft penetrates through a tail sleeve and is connected with a 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 elastic retainer ring which are connected with the main shaft are arranged inside the tail sleeve, the shaft elastic retainer ring is arranged between the first front cover and the third deep groove ball bearing, and one end of the tail sleeve deviates from the locating groove and is provided with a marking ring which is connected with the first front cover.

The multifunctional medical bone drill comprises a drill chuck and an output shaft, wherein 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 is partially inserted into the output shaft, a sealing gasket is sleeved on the periphery of the connecting main shaft inserted 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;

a front sleeve connected with the tail sleeve is sleeved on the periphery of the output shaft, one end of the tail sleeve, which is far away from the positioning groove, is connected with the front sleeve, one end of the front sleeve, which is far 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 in 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 roller pin, a planetary gear and an inner 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.

The multifunctional medical bone drill comprises a shell, a pressure rod and a locking piece, wherein the locking piece comprises a locking sleeve, a locking chuck and a locking wheel which are 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, three consistent locking wheels are arranged on the inner wall of the locking chuck, part of the other end of the locking sleeve is penetrated into the connecting main shaft, one end of the connecting main shaft, which deviates 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 deviates from the positioning groove, is fixedly connected with the shell, the other end of the shell is provided with a third front cover for fixing the locking sleeve, and a third oil seal is arranged inside 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 marking ring is arranged between the third front cover and the shell;

a sliding bearing seat, a sixth deep groove ball bearing and a spring which are sleeved on the locking sleeve are arranged in the shell, a spring washer connected with the spring is sleeved on the locking sleeve, an elastic check ring for a shaft which is sleeved on the locking sleeve is arranged between the spring washer and the sixth deep groove ball bearing, a part of the spring is sleeved on the connecting main shaft, an elastic check ring for a hole which is connected with the spring is sleeved on the connecting main shaft, a seventh deep groove ball bearing which is sleeved on the connecting main shaft is arranged in the tail sleeve, and a third bearing washer which is sleeved on the connecting main shaft is arranged between the elastic check ring for the hole and the seventh deep groove ball bearing;

the bottom of the shell is provided with a fixed seat connected with the pressure lever, part of the pressure lever is inserted into the shell and sleeved on the locking sleeve, and the top of the pressure lever is connected with the sliding bearing seat in a matching manner;

the locking sleeve is partially extended out of the third front cover at one end close to the third front cover.

According to the above, the utility model relates to a technical scheme effect that multi-functional medical bone drill provided is: the utility model vertically arranges the motor in the handle, which can reduce the diameter of the output shaft of the motor and effectively solve the contradiction of small volume and large output torque; the oil seal is used as a dynamic sealing structure, an effective sealing structure is added, blood water can be prevented from entering the bone drill body, the pollution to the interior of the bone drill body can not be caused, and the service life of the tool can be effectively prolonged; the three drill bits with different structures are arranged, so that the bone drill is suitable for the conditions of different operation requirements, and has the advantage that one bone drill is suitable for multiple purposes; the structure is simple, the volume is small, the weight of the moving part is reduced, the power is sufficient, and the reactive loss is reduced as much as possible, so that the working current is reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic structural view of a bone drill body in the multifunctional medical bone drill of the present invention;

fig. 2 is a schematic structural view of a controller in the multifunctional medical bone drill of the present invention;

FIG. 3 is a schematic structural view of a middle tail sleeve of the multifunctional medical bone drill of the present invention;

fig. 4 is a schematic structural view of a first embodiment of the multifunctional medical bone drill of the present invention;

FIG. 5 is a schematic structural view of a second embodiment of the multifunctional medical bone drill of the present invention;

fig. 6 is a schematic structural view of a third embodiment of the multifunctional medical bone drill of the present invention.

Wherein the reference numbers are as follows: the bone drill comprises a bone drill body 101, a machine shell 102, a handle 103, a motor 104, a rear split cap 105, a connecting groove 106, an inner split cap 107, a guide pin shaft 108, a locking pin shaft 109, a knob 110, a machine shell split cap 111, an inner sleeve 112, a controller 113, a control panel 114, a speed regulating device 115, a gear box 116, a motor bevel gear 117, a transmission bevel gear 118, an A-shaped flat key 119, a transmission main shaft 120, a first deep groove ball bearing 121, a shaft sleeve 122, a second deep groove ball bearing 123, a first oil seal 124, a positioning pin seat 125, a torsion spring 126, a control button 201, magnetic steel 202, a button spring 203, a button seat 204, a tail sleeve 301, a positioning straight groove 302, a positioning inclined groove 303, a drill bit 401, a connecting main shaft 402, a drill chuck 403, a first front cover 404, a third deep groove 405, a first bearing gasket ball bearing, a shaft elastic retainer 407, a marking ring 408, an output shaft, a sealing gasket 502, a front sleeve 503, a second, The hydraulic drive device comprises a fourth deep groove ball bearing 506, a fifth deep groove ball bearing 507, a sun gear 508, a needle roller 509, a planetary gear 510, an internal gear 511, a friction plate 512, a shell 601, a pressure lever 602, a locking sleeve 603, a locking chuck 604, a locking wheel 605, a third front cover 606, a third oil seal 607, a second bearing washer 608, a sliding bearing seat 609, a sixth deep groove ball bearing 610, a spring 611, a spring washer 612, an elastic retainer ring 613 for holes, a seventh deep groove ball bearing 614, a third bearing washer 615 and a fixed seat 616.

Detailed Description

In order to make the technical means, the inventive features, the objectives and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings.

The first embodiment of the utility model provides a multifunctional medical bone drill, aiming at reducing the diameter of the output shaft of the motor and effectively solving the contradiction between small volume and large output torque; the oil seal is used as a dynamic sealing structure, an effective sealing structure is added, blood water can be prevented from entering the bone drill body, the pollution to the interior of the bone drill body can not be caused, and the service life of the tool can be effectively prolonged; the three drill bits with different structures are arranged, so that the bone drill is suitable for the conditions of different operation requirements, and has the advantage that one bone drill is suitable for multiple purposes; the structure is simple, the volume is small, the weight of the moving part is reduced, the power is sufficient, and the reactive loss is reduced as much as possible, so that the working current is reduced, and the service life is prolonged.

As shown in fig. 1, 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, the bone drill body 101 comprises a control device, a casing 102, a handle 103, a motor 104 and a transmission device, the handle 103 is fixedly connected to the bottom of the casing 102, the transmission device is arranged inside the casing 102, the motor 104 is arranged inside the handle 103, a gear set connected with the transmission device is arranged at the top of the motor 104, a rear splicing cap 105 connected with the casing 102 is arranged at one end of the transmission device close to the gear set, a connecting groove 106 connected with the drill bit 401 is arranged at the other end of the transmission device, a connecting main shaft 402 connected with the connecting groove 106 in a matching manner is arranged on the drill bit 401, a tail sleeve 301 connected with the casing 102 is sleeved on the connecting main shaft 402, and a locking device connected with the;

the locking device comprises an inner sleeve splicing cap 107, a positioning pin, a knob 110 and a shell splicing cap 111, wherein the knob 110 is sleeved on the transmission device, an inner sleeve 112 sleeved on the transmission device is arranged between the knob 110 and the transmission device, two ends of the inner sleeve 112 are respectively connected with the inner sleeve splicing cap 107 and the shell 102, the shell splicing cap 111 is sleeved at one end, close to the shell 102, of the inner sleeve 112, the positioning pin is connected with the inner sleeve 112, and a positioning groove matched with the positioning pin is formed in the tail sleeve 301.

As shown in fig. 2, the control device adopted in the multifunctional medical bone drill provided by the embodiment includes a controller 113, a control board 114 and a speed regulating device 115, the control board 114 is disposed 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 in control connection with the control board 114, and the control board 114 is in control connection with the motor 104;

the controller 113 comprises a control button 201, and a magnetic steel 202 and a button spring 203 which are arranged inside the control button 201, wherein the magnetic steel 202 is arranged on the upper side of the button spring 203, and the control button 201 is provided with a button seat 204 connected with the handle 103;

the control panel 114 is provided with a hall element sensor matched with the magnetic steel 202 and the speed regulating device 115, when the control panel is used, the magnetic steel 202 and the hall element sensor are controlled by controlling the control button 201 to regulate the rotating speed of the motor 104, the regulating device can regulate the maximum value of the rotating speed of the motor 104, and the regulating device is regulated as required to prevent the rotating speed of the motor 104 from being overlarge when a small rotating speed is required, so that danger is caused.

The embodiment provides a multifunctional medical bone drill, a gear box is arranged in a motor 104, a gear box 116 connected with a gear set is arranged at the top of the motor 104, the gear set comprises a motor bevel gear 117 connected with the gear box 116 and a transmission bevel gear 118 connected with a transmission device, the motor bevel gear 117 is connected with the transmission bevel gear 118, the motor bevel gear 117 and the transmission bevel gear 118 are both provided with an A-shaped flat key 119, the gear box and the motor 104 are integrated into a whole, the part output by the high-speed motor 104 can be directly reduced into the rotating speed required by the medical bone drill, the use efficiency is improved, the volume of the motor 104 can be effectively reduced by the integrated gear box and the motor 104, the medical bone drill is more portable to use, the motor 104 drives the gear box 116 to rotate when in use, the gear box 116 drives the motor bevel gear 117 to rotate so as to drive the transmission bevel gear, the working efficiency in use is improved.

The transmission device adopted by the multifunctional medical bone drill provided by the embodiment comprises a transmission main shaft 120 and a first deep groove ball bearing 121, wherein the first deep groove ball bearing 121 is sleeved at one end of the transmission main shaft 120 close to a connecting groove 106, a transmission bevel gear 118 is sleeved at one end of the transmission main shaft 120 close to a rear splicing cap 105, a shaft sleeve 122 sleeved on the main shaft is arranged 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 arranged between the transmission bevel gear 118 and the rear splicing cap 105, and a first oil seal 124 sleeved on the transmission main shaft 120 is arranged between the rear splicing cap 105 and the transmission main shaft 120;

the connecting groove 106 is arranged at one end, deviating from the rear splicing cap 105, of the transmission main shaft 120, the transmission bevel gear 118 drives the transmission main shaft 120 to rotate when the drill bit is used, the connecting groove 106 at the output end of the transmission main shaft 120 is an inner hexagonal hole, the connecting main shaft 402 is connected with an inner hexagonal opening and an outer hexagonal shaft, the torsion output by the motor 104 can be transmitted to the drill bit 401, and the connection is convenient and convenient to drive.

In the multifunctional medical bone drill provided by the embodiment, the adopted positioning pin comprises a guiding pin shaft 108 and a locking pin shaft 109, the guiding pin shaft 108 is provided with a positioning pin seat 125 connected with the inner sleeve 112 and a torsion spring 126 connected with 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, and the guiding pin shaft 108 is arranged at one end close to the inner splicing cap 107;

the inner sleeve 112 is disposed at one end of the transmission main shaft 120 having the connection slot 106.

In the multifunctional medical bone drill provided by the embodiment, the guiding pin shaft 108 and the locking pin shaft 109 both penetrate through the inner sleeve 112 and extend to the position of the transmission main shaft 120 to the side away from the knob 110; the knob 110 is internally provided with two consistent guide pin shafts 108 and two consistent locking pin shafts 109, when the drill bit 401 is connected with the bone drill body 101 in use, the tail sleeve 301 is inserted between the inner sleeve 112 and the transmission main shaft 120, the positioning straight groove 302 is connected with the guide pin shafts 108, when the tail sleeve 301 is completely inserted into the cobalt drill body, the torsion spring 126 drives the locking pin shafts 109 to slide into the positioning inclined groove 303 to realize locking, and the connection main shaft 402 and the transmission main shaft 120 are prevented from being in matched connection at the moment of shaking.

As shown in fig. 3, in the multifunctional medical bone drill provided by the embodiment, the positioning grooves adopted include a positioning straight groove 302 and a positioning inclined groove 303 which are arranged on a tail sleeve 301, the tail sleeve 301 is symmetrically provided with two identical positioning straight grooves 302, each positioning straight groove 302 is connected with a positioning inclined groove 303, and the opening directions of the two positioning inclined grooves 303 are opposite;

the positioning straight groove 302 is connected with the guide pin shaft 108 in a matching mode, and the positioning inclined groove 303 is connected with the locking pin shaft 109 in a matching mode.

As shown in fig. 4, the drill bit 401 of the multifunctional medical bone drill provided by this embodiment includes a drill chuck 403 and a first front cover 404, one end of the connecting main shaft 402 is connected to the drill chuck 403, the other end of the connecting main shaft 402 penetrates through the tail sleeve 301 and is connected to the connecting slot 106, the first front cover 404 is disposed between the drill chuck 403 and the tail sleeve 301, the tail sleeve 301 is internally provided with a third deep groove ball bearing 405 connected to the connecting main shaft 402, a first bearing gasket 406 and a shaft elastic gasket 407, the shaft elastic gasket 407 is disposed between the first front cover 404 and the third deep groove ball bearing 405, one end of the tail sleeve 301 departing from the positioning slot is provided with an indicator ring 408 connected to the first front cover 404, when in use, a drill needle to be used is fixed on the drill chuck 403 by the drill chuck 403, the drill bit 401 provided by this embodiment is a high-speed drill, both ends of the connecting main shaft 402 are directly connected to the chuck and the transmission main shaft, the transmission main shaft 120 is directly connected with the main shaft 402 in a driving mode so as to drive the drill chuck 403, and the structure is compact and the working efficiency is high.

Second embodiment:

as shown in fig. 5, different from the first embodiment, the multifunctional medical bone drill provided in this embodiment adopts a drill bit 401 including a drill chuck 403 and an output shaft 501, two ends of the output shaft 501 are respectively connected with the drill chuck 403 and a connecting main shaft 402, one end of the connecting main shaft 402 is partially inserted into the output shaft 501, a sealing gasket 502 is sleeved on the periphery of the connecting main shaft 402 inserted into the output shaft 501, and the other end of the connecting main shaft 402 penetrates through a tail sleeve 301 to be connected with a connecting groove 106;

the periphery of the output shaft 501 is sleeved with a front sleeve 503 connected with the tail sleeve 301, one end of the tail sleeve 301, which deviates from the positioning groove, is connected with the front sleeve 503, one end of the front sleeve 503, which deviates from the tail sleeve 301, is connected with a second front cover 504, a mark ring is arranged between the second front cover 504 and the front sleeve 503, and a second oil seal 505 sleeved on the output shaft 501 is arranged in the front cover;

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

a friction plate 512 sleeved on the main shaft 402 is arranged between the central gear 508 and the fifth deep groove ball bearing 507, the drill bit 401 provided by the embodiment is a low-speed drill bit 401, when in use, a drill needle to be used is fixed on the drill chuck 403 through the drill chuck 403, the transmission main shaft 120 is driven to be connected with the main shaft 402 and further drive the transmission shaft, and the central gear 508 and the planetary gear 510 arranged between the main shaft 402 and the transmission shaft have the effect of reducing speed, so that the output torque is improved, and the rotating speed is reduced.

The third embodiment:

as shown in fig. 6, different from the first embodiment, the multifunctional medical bone drill provided in this embodiment includes a drill 401, a pressure rod 602, and a locking member, the locking member includes a locking sleeve 603, a locking chuck 604 and a locking wheel 605 disposed inside the locking sleeve 603, the locking sleeve 603 is sleeved with the casing 601, the locking chuck 604 and the locking wheel 605 are disposed at the same end of the locking sleeve 603, the locking chuck 604 is disposed on an inner wall of the locking sleeve 603, the inner wall of the locking chuck 604 is provided with three identical locking wheels 605, the other end of the locking sleeve 603 is partially inserted into the connecting spindle 402, one end of the connecting spindle 402 departing from the locking sleeve 603 is connected to the connecting slot 106, the tail sleeve 301 is sleeved on the connecting spindle 402, one end of the tail sleeve 301 departing from the positioning slot is fixedly connected to the casing 601, the other end of the casing 601 is provided with a third front cover 606 for fixing the locking sleeve 603, a third oil seal 607 is disposed inside the third front cover 606, a second bearing gasket 608 sleeved on the locking sleeve 603 is arranged between the third oil seal 607 and the shell 601, and an indicating ring 408 is arranged between the third front cover 606 and the shell 601;

a sliding bearing seat 609, a sixth deep groove ball bearing 610 and a spring 611 which are sleeved on a locking sleeve 603 are arranged in the shell 601, a spring washer 612 for connecting the spring 611 is sleeved on the locking sleeve 603, a shaft elastic retaining ring 407 sleeved on the locking sleeve 603 is arranged between the spring washer 612 and the sixth deep groove ball bearing 610, a part of the spring 611 is sleeved on the connecting main shaft 402, a hole elastic retaining ring 613 for connecting the spring 611 is sleeved on the connecting main shaft 402, a seventh deep groove ball bearing 614 sleeved on the connecting main shaft 402 is arranged in the tail sleeve 301, and a third bearing washer 615 sleeved on the connecting main shaft 402 is arranged between the hole elastic retaining ring 613 and the seventh deep groove ball bearing 614;

a fixed seat 616 connected with the pressure lever 602 is arranged at the bottom of the shell 601, part of the pressure lever 602 is inserted into the shell 601 and sleeved on the locking sleeve 603, and the top of the pressure lever 602 is connected with the sliding bearing seat 609 in a matching manner;

the locking sleeve 603 partially protrudes out of the third front cover 606 at one end close to the third front cover 606, the structure of the embodiment is a kirschner wire drill, when the locking member is used, the locking member can perform a locking and releasing working process under the driving of the pressure lever 602, when the pressure lever 602 is pulled to insert the kirschner wire into the locking member, the three consistent locking wheels 605 are used for releasing simultaneously, so that the kirschner wire with the thickness of 0.8-3.5 mm can be inserted, the selection of the kirschner wire is improved, and because the contact part between the locking wheels 605 and the kirschner wire is changed from a circle to a square, the contact between the locking wheels 605 and the kirschner wire can be changed from point contact to line contact, the clamping area is increased, and the clamping stability and the concentricity of the drill bit 401 are improved.

To sum up, the utility model of the multifunctional medical bone drill can reduce the diameter of the output shaft of the motor, effectively solve the contradiction of small volume and large output torque; the oil seal is used as a dynamic sealing structure, an effective sealing structure is added, blood water can be prevented from entering the bone drill body, the pollution to the interior of the bone drill body can not be caused, and the service life of the tool can be effectively prolonged; the three drill bits with different structures are arranged, so that the bone drill is suitable for the conditions of different operation requirements, and has the advantage that one bone drill is suitable for multiple purposes; the structure is simple, the volume is small, the weight of the moving part is reduced, the power is sufficient, and the reactive loss is reduced as much as possible, so that the working current is reduced, and the service life is prolonged.

The above description has been made of specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. A multifunctional medical bone drill, which comprises a bone drill body and a drill bit, wherein the drill bit is connected with the bone drill body, it 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 with the bottom of the machine shell, the transmission device is arranged in the machine shell, the motor is arranged inside the handle, the top of the motor is provided with a gear set connected with the transmission device, one end of the transmission device close to the gear set is provided with a rear splicing cap connected with the casing, the other end of the transmission device is provided with a connecting groove connected with the drill bit, a connecting main shaft which is connected with the connecting groove in a matching mode is arranged on the drill bit, a tail sleeve connected with the shell is sleeved on the connecting main shaft, and a locking device connected with the tail sleeve is arranged at one end, away from the rear splicing cap, of the shell;

2. The multifunctional medical bone drill according to claim 1, wherein the control device comprises a controller, a control board and a speed regulating device, the control board 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 in control connection with the control board, and the control board is in control connection with the motor;

3. The multifunctional medical bone drill according to claim 2, wherein a gear box is provided inside the motor, a gear box connected to the gear set is provided on the top of the motor, the gear set comprises 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 flat key of type a.

4. The multifunctional medical bone drill according to claim 3, wherein the transmission device comprises a transmission main shaft and a first deep groove ball bearing, the first deep groove ball bearing is sleeved at one end of the transmission main shaft close to the connecting groove, the transmission bevel gear is sleeved at one end of the transmission main shaft close to the rear splicing cap, a shaft sleeve sleeved on the main shaft is arranged 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 arranged between the transmission bevel gear and the rear splicing cap, and a first oil seal sleeved on the transmission main shaft is arranged between the rear splicing cap and the transmission main shaft;

5. The multifunctional medical bone drill according to claim 4, wherein the positioning pin comprises a guiding pin shaft and a locking pin shaft, the guiding pin shaft is provided with a positioning pin seat connected with the inner sleeve and a torsion spring connected with 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 guiding pin shaft is arranged at one end close to the inner sleeve splicing cap;

6. The multifunctional medical bone drill according to claim 5, wherein the guide pin and the locking pin both extend through the inner sleeve to a side away from the knob to the transmission main shaft; two consistent guide pin shafts and two consistent locking pin shafts are arranged inside the knob.

7. The multifunctional medical bone drill according to claim 6, wherein the positioning slot comprises a positioning straight slot and a positioning inclined slot which are arranged on the tail sleeve, two identical positioning straight slots are symmetrically arranged on the tail sleeve, the positioning inclined slot is connected to each positioning straight slot, and the two positioning inclined slots have opposite opening directions;

8. The multifunctional medical bone drill according to claim 7, wherein the drill bit comprises a drill chuck and a first front cover, one end of the connecting main shaft is connected to the drill chuck, the other end of the connecting main shaft penetrates through the tail sleeve to be 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 elastic retainer ring which are connected with the connecting main shaft are arranged inside the tail sleeve, the shaft elastic retainer ring is arranged between the first front cover and the third deep groove ball bearing, and an indicating ring which is connected with the first front cover is arranged at one end of the tail sleeve, which is far away from the positioning groove.

9. The multifunctional medical bone drill according to claim 7, wherein the drill comprises a drill chuck and an output shaft, both ends of the output shaft are respectively connected with the drill chuck and the connecting main shaft, one end of the connecting main shaft is partially inserted into the output shaft, a sealing gasket is sleeved on the periphery of the connecting main shaft inserted 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;

10. The multifunctional medical bone drill according to claim 7, wherein the drill comprises a housing, a pressing rod, and a locking member, the locking member comprises a locking sleeve, and a locking collet and a locking wheel disposed inside the locking sleeve, the housing is sleeved on the locking sleeve, the locking collet and the locking wheel are disposed at the same end of the locking sleeve, the locking collet is disposed on the inner wall of the locking sleeve, three identical locking wheels are disposed on the inner wall of the locking collet, a portion of the other end of the locking sleeve is extended into the connecting main shaft, one end of the connecting main shaft departing 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 departing from the positioning groove is fixedly connected to the housing, and the other end of the housing 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 gasket 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;