The content of the invention
The present invention is existing middle in order to solve the problems, such as, there is provided a kind of medical bone drill, including hand handle, drill body and drill bit, hand
Being separately fixed at drill bit on drill body, drill bit is provided with motor, and described drill bit is provided with fixed seat and drill bit is dismountable
Connection, described fixed seat include a recessed fixation seat shell, are provided with rotating bar and motor connection among fixed seat shell, turn
The end of lever is provided with driving gear, driving gear and the fixing tooth gear teeth and fixed gear is three, is set on each fixed gear
There is the fix bar with the axial parallel distribution of fixed gear, fixed end is provided with gland, passes through motor and rotates rotating bar and drives
Driving gear, driving gear drive fixed gear, and fixed gear drives rotating bar to rotate, and fixed gear and driving gear are solid respectively
It is scheduled on base;
In certain embodiments, the opening for being used for placing fixed gear is provided with fixed seat shell so that gear can freely turn
Dynamic, not excessive gear can be when fixed seat shell transfer be dynamic, it is not necessary to hatch frame is set, in the preferred case, three
Fixed gear specification is the same, and the radius of driving gear is less than fixed gear.
Hand handle, drill bit and motor use existing technology in the present invention, and drill bit of the invention can be various differences
Model, when in use, the versatility of bone drill according to clinical more preferable different drill bit, can be improved.
Described drill bit includes a screen post and drilling rod, and described screen post is stuck in fix bar.
Specific occupation mode is as follows:When three fixed gears are in a direction, bar is usually fixed from master
Moving gear is farthest, and gland is distributed generally along the tangential direction of fixed gear, this when screen post can be stuck in rule
In fixed pole, with hand fine rotation fix bar, gland can blocks screen post, and three fix bars will tightly bite screens
Post, and then screen post can be driven to rotate.The advantages of this mode, mainly there is three:First, it is easy for installation, screen post need to only be put
Enter in the space that fix bar surrounds, fine rotation fix bar;Second, fixed force is strong, fix bar and screens can tightly be stung
Firmly, due to the rotation of fixed gear, fix bar around fixed gear central axis direction, with the rotation of fixed gear, three
Space between fix bar can be less and less, and then can get one's teeth into screen post;Third, in terms of release;Needing more preferable bore
When head, it is only necessary to gently by fixed column backwards rotation.
As an improvement, described drill bit also includes the first rotation seat connected with drilling rod, rotation seat is provided with motion bar,
The end of motion bar is fixed with movable block;Screen post is fixedly connected with connecting rod, and connecting rod end integrated molding has connection sheet, connection
Piece is fixedly connected with the second swivel base, and the second swivel base is provided with loose slot, and movable block is located in loose slot, and can only be moved down along on loose slot
Dynamic, the bottom of loose slot is provided with one and is used for the passage that movable post passes through, by elasticity between the first rotation seat and the second rotation seat
Part connects, and elastic component is in compressive state.
The compressive preload power of elastic component of the present invention can need to be configured, the suitable threshold value of this preload force, control
Transformation critical point between rigidity and elasticity processed, the size of preload force need to control movable block to be controlled according to critical point.
As an improvement, described elastic component is spring or the standby flexure strip of rubber system, rubber in the preferred case, uses
Fluorine silica gel, described fluorine silica gel include 100 parts of fluorine silicon raw rubber, 1 part of silane coupler, 5 parts of carborundum, 0.5 part of cobalt and 10
The fluorosilicon oil of part, surface modification is carried out using traditional handicraft, is kneaded and prepares shell fragment.Elasticity prepared by the present invention has longer
When the life-span(The present invention be hit by a bullet piece for a long time be in compressive state).
As an improvement, the first described rotation seat is provided with a containment vessel that can wrap up spring, described containment vessel can
The second rotation seat is wrapped up with all or part of.
As an improvement, described connection sheet and the second rotation seat is connected by screw.
As an improvement, described movable block and the section of loose slot are regular hexagon, movable block is enclosed in screen post, and
And fix and limit movable block provided with a nut in screen post and moved away from the first rotation seat direction.
Described preferred drill bit can have rigidity and elasticity concurrently, when the axial compressive force that drill bit is subject to is little, activity
Block is located at the bottom of loose slot, will not be rotated along the direction of loose slot, axle will not occur for the first rotation seat and the second rotation seat
To movement, when the pressure of axial direction is more than certain force(The extruding force of movable block and loose slot), this when, movable block was along work
Dynamic groove is mobile and then the first rotation seat moves axially along the second rotation seat, and drill bit is in an elastic state, this elasticity
State can avoid overexercise of the drill bit to bone, can be effectively protected bone.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of fixed seat of the present invention;
Fig. 3 is the connection figure of gear member;
Fig. 4 is the schematic diagram of fixed seat;
Fig. 5 is the structural representation of embodiment 2;
Fig. 6 is the structural representation of the drill bit of embodiment 2;
Fig. 7 is the schematic diagram of the drill bit of embodiment 2;
Fig. 8 is the connection figure of the first rotation seat and the second rotation seat;
Fig. 9 is spring schematic diagram;
Figure 10 is the schematic diagram of drilling rod;
Marked in figure:1- hand handles, 2- drill bodies, 201- motors, 3- fixed seats, 301- fix seat shell, 302- fixed gears, 303- bottoms
Seat, 304- fix bars, 305- glands, 306- rotating bars, 307- driving gears, 4- drill bits, 401- screen posts, 402- connections
Bar, 403- connection sheets, 404- containment vessels, 405- drilling rods, 406- springs, 407- activity posts, 408- loose slots, 409- movable blocks.