CN216823696U - Fixture and root canal preparation machine - Google Patents

Abstract

The utility model provides a fixture and root canal preparation machine, root canal preparation machine includes the handle, the aircraft nose, power unit and fixture, fixture includes the shell, the clamping piece, compress tightly subassembly and regulating part, the shell has accommodating space, the clamping piece includes the tensioning post of accomodating in accommodating space and sets up in the chuck of the one end of tensioning post, the one end of keeping away from the tensioning post of chuck sets up the centre gripping hole, compress tightly the subassembly cover and locate outside the tensioning post and lie in the shell, compress tightly the subassembly and be used for being connected with the power unit transmission, the regulating part assembles in the tensioning post and links to each other with compressing tightly the subassembly, the regulating part can adjust the position of compressing tightly the subassembly in the axial direction of tensioning post; the pressing assembly can drive the chuck to contract when moving towards the direction close to the chuck, so that the size of the clamping hole is reduced. The fixture of this scheme can provide great clamping-force to instrument centre gripping such as with root canal file is stable, and, convenient and fast when functional unit dismantles makes root canal preparation machine more reliable and use more convenient.

Description

Fixture and root canal preparation machine

Technical Field

The utility model belongs to the technical field of the dental instrument, especially, relate to a fixture and root canal preparation machine.

Background

The root canal preparation machine is a common instrument in dental treatment, and is mainly used for clamping root canal files and other tools to rotate so as to remove infected substances in the root canal and complete the cutting and the smooth root canal wall.

The dental root canal preparation machine that uses on the market at present generally includes the aircraft nose of handle and assembly in the one end of handle, sets up fixture in the aircraft nose, and fixture is used for the fixed root canal file of clip and other instruments, sets up corresponding actuating mechanism in the handle and drives fixture rotatory.

However, in the related art, the clamping mechanism has the problem that the clamping force is small, and tools such as root canal files cannot be stably clamped, which is not beneficial to use.

SUMMERY OF THE UTILITY MODEL

A technical object of the utility model is to provide a fixture and root canal preparation machine can provide great clamping-force to it is stable with instrument centre gripping such as root canal file, makes root canal preparation machine more reliable.

In order to solve the technical problem, the present invention provides a clamping mechanism for a root canal preparation machine, wherein the root canal preparation machine is provided with a power mechanism, the clamping mechanism comprises a casing, a clamping member, a pressing assembly and an adjusting member, the casing is provided with an accommodating space, the clamping member comprises a tensioning column accommodated in the accommodating space and a chuck arranged at one end of the tensioning column, one end of the chuck, which is far away from the tensioning column, is provided with a clamping hole, the pressing assembly is sleeved outside the tensioning column and positioned in the casing, the pressing assembly is used for being in transmission connection with the power mechanism, the adjusting member is assembled on the tensioning column and connected with the pressing assembly, and the position of the pressing assembly in the axial direction of the tensioning column can be adjusted by the adjusting member; when the pressing assembly moves towards the direction close to the chuck, the chuck can be driven to contract, so that the size of the clamping hole is reduced.

Furthermore, the chuck comprises at least two clamping blocks which are arranged at one end of the tensioning column and are distributed at intervals around the central axis of the tensioning column, and the clamping holes are formed by enclosing the clamping blocks.

Further, the clamp splice has and is close to the inner wall in centre gripping hole with keep away from the outer wall in centre gripping hole, the outer wall with the contained angle has between the axis of taut post, the outer wall with distance between the axis certainly taut post to the direction of chuck increases gradually.

Furthermore, the tensioning column is hollow, and deformation notches are formed in two sides of the joint of the chuck and the tensioning column.

Further, the adjusting piece and the tensioning column are connected with the thread far away from the chuck end, and the adjusting piece abuts against the side, far away from the chuck, of the pressing component.

Furthermore, the end, far away from the chuck, of the tensioning column protrudes to form a threaded column, one side of the adjusting piece is provided with a threaded hole matched with the threaded column, and the other side of the adjusting piece is provided with an inner polygonal counter bore.

Furthermore, a transmission hole is formed in one side of the casing, the pressing assembly comprises a pressing sleeve and meshing teeth, the pressing sleeve is arranged outside the tensioning column, one end of the pressing sleeve abuts against the outer side of the chuck, the other end of the pressing sleeve is abutted against by the adjusting piece, the meshing teeth are arranged outside the pressing sleeve and correspond to the transmission hole, and the transmission hole is used for allowing the power mechanism to be connected to the meshing teeth.

Furthermore, the outer side of the pressing sleeve, which is close to the chuck, protrudes radially outwards to form a pressing ring, the inner side of the pressing sleeve, which corresponds to the pressing ring, is a pressing inclined plane, the pressing inclined plane abuts against the chuck, and the pressing inclined plane is gradually expanded radially outwards in the direction towards the chuck.

Further, the cover shell includes an assembly cylinder and an assembly cover fixedly connected to one end of the assembly cylinder, the pressing sleeve further includes two sets of assembly bearings which are arranged outside the pressing sleeve and located at two ends of the meshing teeth respectively, outer rings of the assembly bearings are fixed to inner walls of the assembly cylinder, and the assembly cover is abutted to one side of the assembly bearings.

Further, a root canal preparation machine is provided, including handle, aircraft nose, power unit and as above arbitrary fixture, the aircraft nose set up in the one end of handle, fixture set up in the aircraft nose, power unit assemble in the handle just connect in fixture's the subassembly that compresses tightly, power unit is used for passing through compress tightly the subassembly and drive the clamping piece rotates.

The utility model discloses well fixture and root canal preparation machine compare with prior art, beneficial effect lies in:

when functional components such as root canal files and lathing needles are assembled, the end part of the functional component is firstly stretched into the clamping hole, then the position of the compressing assembly in the axial direction of the tensioning column is adjusted through the adjusting part, so that the compressing assembly moves towards the direction of the chuck, the compressing assembly compresses the outer side of the chuck to drive the chuck to contract, the size of the clamping hole is reduced, and finally the chuck clamps the functional component; when the functional unit need be loosened, only need adjust the regulating part, make the pressure tight subassembly move towards the direction of keeping away from the chuck, thereby the chuck kick-backs and makes the increase in size in centre gripping hole for the functional unit can take off. The fixture of this scheme can provide great clamping-force to instrument centre gripping such as with root canal file is stable, and, convenient and fast when functional unit dismantles makes root canal preparation machine more reliable and use more convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of a clamping mechanism in an embodiment of the present invention;

fig. 2 is a schematic structural view of the clamping mechanism of the embodiment of the present invention after being partially cut;

fig. 3 is a schematic perspective exploded view of the clamping mechanism in the embodiment of the present invention;

FIG. 4 is a schematic structural view of a clamping member according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a root canal preparation machine to which a fixture is applied according to an embodiment of the present invention;

fig. 6 is a schematic perspective exploded view of a root canal preparation machine with a fixture according to an embodiment of the present invention.

In the drawings, each reference numeral denotes: 1. a handle; 2. a machine head; 3. a clamping mechanism; 4. a drive assembly; 11. a handle; 12. a neck portion; 13. connecting sleeves; 31. a housing; 32. a clamping member; 33. a compression assembly; 34. an adjustment member; 311. assembling the cartridge; 312. assembling a cover; 3111. a drive bore; 321. tensioning the column; 322. a chuck; 3221. a clamping hole; 3222. a clamping block; 32221. an inner wall; 32222. an outer wall; 32223. deforming the notch; 331. a compression sleeve; 332. meshing teeth; 333. assembling a bearing; 3311. pressing the ring; 3312. pressing the inclined plane; 41. a rotating wheel; 42. a drive mechanism; 421. a drive shaft; 4211. a first driving section; 4212. a second driving section; 4213. and a ball.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example (b):

in this embodiment, with reference to fig. 1 to 4, there is provided a clamping mechanism 3 for a root canal preparation machine (see fig. 5 and 6), the root canal preparation machine having a power mechanism therein, the clamping mechanism 3 including a casing 31, a clamping member 32, a pressing member 33 and an adjusting member 34, the casing 31 having a receiving space, the clamping member 32 including a tightening rod 321 received in the receiving space and a clamping head 322 disposed at one end of the tightening rod 321, a clamping hole 3221 disposed at an end of the clamping head 322 away from the tightening rod 321, the pressing member 33 being disposed outside the tightening rod 321 and inside the casing 31, the pressing member 33 being configured to be in transmission connection with the power mechanism, the adjusting member 34 being assembled to the tightening rod 321 and connected to the pressing member 33, the adjusting member 34 being capable of adjusting a position of the pressing member 33 in an axial direction of the tightening rod 321; the compressing assembly 33 can move in a direction approaching the collet 322 to contract the collet 322, so that the size of the holding hole 3221 is reduced.

When assembling functional components such as root canal files, lathes and the like, firstly, the end part of the functional component extends into the clamping hole 3221, then the position of the compressing assembly 33 in the axial direction of the tensioning column 321 is adjusted through the adjusting piece 34, so that the compressing assembly 33 moves towards the direction of the chuck 322, the compressing assembly 33 compresses the outer side of the chuck 322 to drive the chuck 322 to contract, the size of the clamping hole 3221 is reduced, and finally, the chuck 322 clamps the functional component; when it is desired to release the feature, adjustment of the adjustment member 34 is merely required to move the compression assembly 33 away from the collet 322 and the collet 322 springs back to increase the size of the retaining aperture 3221 to allow the feature to be easily removed. The fixture 3 of this scheme can provide great clamping-force to instrument centre gripping such as with root canal file is stable, and, convenient and fast when functional unit dismantles makes root canal preparation machine more reliable and use more convenient.

The clamping head 322 includes at least two clamping blocks 3222 disposed at one end of the tightening rod 321 and spaced around a central axis of the tightening rod 321, and each clamping block 3222 encloses a clamping hole 3221. Specifically, in this embodiment, the collet 322 includes four clamping blocks 3222, each clamping block 3222 has the same shape and size, the four clamping blocks 3222 are arranged around the central axis of the tightening rod 321 at equal angular intervals to form a ring, a gap is formed between adjacent clamping blocks 3222, the gap can be used as a deformation space when the clamping blocks 3222 are deformed radially inward, and the clamping of functional components such as an endodontic file or a needle can be achieved in four directions by using the collet 322 of the four clamping blocks 3222, so that the clamping is more stable and reliable. In some embodiments, the collet 322 can also include three, five, six, seven, etc. segments of the gripping blocks 3222, and each of the gripping blocks 3222 is shaped identically and is equiangularly spaced about the central axis of the tensioning column 321. Alternatively, the size of each of the retaining pieces 3222 of the retaining clip 322 may be different, so long as they enclose a ring shape to form a retaining hole 3221 therein.

The clamping block 3222 has an inner wall 32221 close to the clamping hole 3221 and an outer wall 32222 far from the clamping hole 3221, an included angle is formed between the outer wall 32222 and the central axis of the tension rod 321, and the distance between the outer wall 32222 and the central axis gradually increases from the tension rod 321 to the clamping head 322.

Specifically, in this embodiment, the inner wall 32221 is a circular arc surface and is coaxial with the tightening rod 321, and the outer wall 32222 is a conical arc surface and is coaxial with the tightening rod 321, so that when clamping a functional component such as a root canal file and a needle, coaxiality between the functional component and the clamping member 32 can be ensured, and reliability is higher, and further, since a distance between the outer wall 32222 and the central axis gradually increases from the tightening rod 321 to the direction of the chuck 322, the outer wall 32222 can serve as a force-bearing slope, when the pressing assembly 33 moves toward the indenter, one end of the pressing assembly 33 can abut against one side of the outer wall 32222, so as to press the clamping block 3222 inward, so that the size of the clamping hole 3221 is reduced, so as to provide a uniform and large clamping force for the functional component, and clamping is more stable and firm.

Optionally, the angle formed between the outer wall 32222 and the central axis may be 15 ° to 45 °, such as 20 °, 25 °, 30 °, 35 °, 40 °, and so on, and such included angle may allow the collet 322 to generate a larger clamping force on the functional component, thereby securing the functional component more stably.

In some embodiments, the inner wall 32221 may be provided with anti-slip patterns, which may extend along the circumferential direction of the inner wall 32221 and be spaced apart along the axial direction of the tightening rod, so that functional components such as root canal files, needles, etc. are not prone to slip in the axial direction after being held by the collet 322. In some embodiments, the inner wall 32221 may be provided with anti-slip threads extending in the axial direction and spaced apart in the axial direction to prevent the functional component from rotating and slipping within the clamping hole 3221 when clamped. In some embodiments, the chuck 322 can be set to have magnetism, the assembly parts of the functional components such as root canal file and needle are made of magnetic material, therefore, the functional components can be inserted in the clamping holes 3221 to be primarily fixed in the assembly process without being supported by hands or other tools, and then the functional components are fixed and stable through the adjustment of the adjusting piece 34, in addition, the functional components are not directly fallen off due to the magnetic effect after the chuck 322 is loosened in the process of disassembling the functional components, and therefore, the assembly and disassembly processes of the functional components are more convenient and faster.

In this embodiment, the tightening rod 321 is hollow, and deformation notches 32223 are formed on both sides of the joint of the collet 322 and the tightening rod 321. Specifically, two deformation notches 32223 are symmetrically arranged on two sides of the chuck 322, so that the chuck 322 is stressed and deformed more uniformly, the clamping effect is better, and in addition, due to the arrangement of the deformation notches 32223, the chuck 322 is deformed more easily, the sensitivity is higher, and the clamping force is adjusted more accurately.

The adjusting piece 34 is screwed with the end of the tightening column 321 away from the collet 322, and the adjusting piece 34 abuts against the side of the pressing component 33 away from the collet 322.

Specifically, in this embodiment, the protruding screw thread post that forms of chuck 322 end of keeping away from of taut post 321, one side of regulating part 34 has the screw hole with the screw thread post adaptation, the polygon counter bore in the opposite side of regulating part 34 sets up, the polygon counter bore can be the hexagon socket head cap counter bore, when assembly or dismantlement functional unit, can realize the regulation of regulating part 34 through the hexagon socket head cap spanner, thereby adjustment regulating part 34 supports the dynamics that the top compressed tightly subassembly 33, press from both sides tight or the bullet unclamps outward in order to realize the shrink of chuck 322, and then realize that the centre gripping or the pine of functional unit take off, it is convenient simple and can provide great clamping-force.

In some embodiments, the end of the tightening rod 321 remote from the collet 322 may be provided with a threaded hole, one side of the adjusting member 34 may be provided with a threaded rod matching the threaded hole, the other side of the adjusting member 34 may be provided with a polygonal counter bore, and the adjusting member 34 abuts against one end of the pressing assembly 33. The position of the pressing assembly 33 can be adjusted by adopting the arrangement mode, so that the clamping or loosening of the clamping head 322 is realized, and the clamping device is convenient and simple and can provide larger clamping force.

The transmission hole 3111 is seted up to one side of shell 31, compresses tightly subassembly 33 and includes compressing tightly cover 331 and meshing tooth 332, compresses tightly the cover 331 and locates outside taut post 321, and one end of compressing tightly cover 331 butts in the outside of chuck 322 and the other end is supported by adjusting part 34, and meshing tooth 332 sets up outside compressing tightly cover 331 and corresponds with transmission hole 3111, and transmission hole 3111 is used for supplying power unit to connect in meshing tooth 332. Because the two ends of the pressing sleeve 331 are respectively abutted by the adjusting piece 34 and the chuck 322, when the functional component is clamped, the pressing sleeve 331 is also pressed by the adjusting piece 34 and the chuck 322, therefore, the pressing sleeve 331, the meshing teeth 332, the clamping piece 32 and the adjusting piece 34 form an integrated structure, and the power mechanism can drive the integrated structure to rotate through the meshing teeth 332, so as to drive the functional component to rotate. In some embodiments, the pressing sleeve 331 and the clamping member 32 may be connected by a pin or a key, so as to improve the stability of the connection between the two.

The outer side of the pressing sleeve 331 near the collet 322 protrudes radially outward to form a pressing ring 3311, the inner side of the pressing sleeve 331 corresponding to the pressing ring 3311 is a pressing inclined surface 3312, the pressing inclined surface 3312 abuts against the collet 322, and the pressing inclined surface 3312 is gradually expanded radially outward in a direction toward the collet 322. Specifically, in this embodiment, the pressing inclined surface 3312 is a conical arc surface, and an inclination angle of the pressing inclined surface 3312 is consistent with an inclination angle of the outer wall 32222 of the collet 322, so that the pressing sleeve 331 can apply force to the collet 322 more uniformly and stably, and has a more reliable structure and a longer service life. In some embodiments, the inner side of the pressing sleeve 331 may not be provided with a slope, such as only a round between the inner side and the end surface, and the inward pressing of the collet 322 may also be achieved during the movement of the pressing sleeve 331 toward the collet 322.

The casing 31 includes a fitting cylinder 311 and a fitting cap 312 fixedly connected to one end of the fitting cylinder 311, the pressing sleeve 331 further includes two fitting bearings 333 disposed outside the pressing sleeve 331 and respectively located at both ends of the engaging teeth 332, an outer ring of the fitting bearing 333 is fixed to an inner wall 32221 of the fitting cylinder 311, and the fitting cap 312 abuts against one side of one of the fitting bearings 333. Since the clamping sleeve 331 is connected to the inner wall 32221 of the assembling cylinder 311 through the two assembling bearings 333, the rotation of the clamping member 32 and the clamping sleeve 331 is smoother and more stable, and in addition, the assembling cylinder 311 and the assembling cover 312 abut against the two assembling bearings 333 respectively, so that the stability of the clamping member 32 and the clamping sleeve 331 in the axial direction during the rotation can also be ensured.

The fixture 3 of this scheme is a whole, can regard as a module assembly to the root canal preparation machine when the equipment, and convenient and fast more can promote the assembly efficiency of product when the assembly.

Further, combine fig. 5 and fig. 6 to provide a root canal preparation machine, including handle 1, aircraft nose 2, power unit and fixture 3 as above any, aircraft nose 2 sets up in one end of handle 1, and fixture 3 sets up in aircraft nose 2, and power unit assembles in handle 1 and connects in fixture 3's compressing assembly 33, and power unit is used for driving clamping piece 32 through compressing assembly 33 and rotates.

Specifically, power unit includes drive assembly 4 and drive assembly, aircraft nose 2 is connected in the one end of handle 1, fixture 3 rotates and connects in aircraft nose 2, fixture 3 is used for the centre gripping functional unit, drive assembly 4 is including rotating runner 41 of connecting in handle 1 and connecting in runner 41's drive mechanism 42, the edge of runner 41 is outstanding in the surface of handle 1, drive assembly sets up in handle 1 and connects in drive mechanism 42 and fixture 3, runner 41 can drive fixture 3 through drive mechanism 42 and drive assembly when rotating and rotate.

The functional unit can be root canal file, car needle etc, the functional unit is fixed by 3 centre grippings of fixture, in the use, handle 1 can be used for gripping, in order to realize the position adjustment of root canal preparation machine, with the suitable back of position adjustment of root canal preparation machine, can follow the outside and rotate runner 41 with the finger, runner 41 drives fixture 3 through actuating mechanism 42 and drive assembly and rotates, thereby it rotates to drive the functional unit, in order to realize the function that corresponds, this scheme can drive the corresponding effect of functional unit performance through manual mode, rotational speed and rotation volume all can be adjusted according to actual conditions, it is more nimble, can supplement the medical instrument storehouse of dental treatment. It should be understood that in some embodiments, the root canal preparation machine may be electrically powered, in which case the drive assembly 4 may include a power source, such as a motor, e.g., a servo motor, and the drive mechanism 42 may be a gear reduction mechanism, in such a manner that the root canal preparation machine may be electrically powered and thus save more effort.

In this embodiment, the handle 1 includes a handle portion 11 and a neck portion 12 connected to one end of the handle portion 11, the handpiece 2 is connected to the end of the neck portion 12 far from the handle portion 11, the rotating wheel 41 is rotatably connected to the handle portion 11, the driving mechanism 42 is disposed at the connection position of the handle portion 11 and the neck portion 12 and at least partially located in the handle portion 11, and the transmission assembly is disposed in the neck portion 12.

Specifically, stalk portion 11 has and accepts the chamber, the one end of stalk portion 11 is sealed, the other end opening of stalk portion 11, the stalk portion 11 end of keeping away from of neck 12 extends and the diameter diminishes towards a lateral buckling, neck 12 has logical chamber, neck 12 is connected in the open end of stalk portion 11, the logical chamber of neck 12 is linked together with the chamber of accepting of stalk portion 11 promptly, runner 41's middle part is provided with rotates the pivot of being connected with stalk portion 11, the both ends of pivot can rotate respectively and connect in the inner wall 32221 of stalk portion 11, the both sides that runner 41 is relative can stand out outside stalk portion 11 respectively, can understand, stalk portion 11 has the opening of stepping down that supplies runner 41 to stretch out, consequently, the finger all can drive runner 41 from both sides and rotate, no matter be left hand or right hand all can operate with convenience.

The driving mechanism 42 includes a first bevel gear coaxially disposed on the rotating shaft, and a driving shaft 421 having one end connected to the first bevel gear and the other end extending to the neck 12 and connected to the transmission assembly. The first bevel gear and the rotating wheel 41 can be integrally formed, the first bevel gear and the rotating wheel 41 can be formed by injection molding of the same material, or the rotating wheel 41 can be made of a plastic material, the first bevel gear and the rotating shaft are made of a metal material and are formed in the rotating wheel 41 in an injection molding mode, the ratio of the outer diameter of the first bevel gear to the outer diameter of the rotating wheel 41 can be 0.2-0.5, and therefore the labor-saving effect can be achieved, and the axial direction of the driving shaft 421 is perpendicular to the axial direction of the rotating wheel 41, so that the driving direction is changed.

In this embodiment, in order to connect the handle 11 and the neck 12 and to achieve the rotational assembly of the driving shaft 421, the handle 1 further includes a connecting sleeve 13 connected to the handle 11 and the neck 12, the connecting sleeve 13 has a through hole communicating the handle 11 and the neck 12, the driving shaft 421 includes a first driving portion 4211 and a second driving portion 4212, one end of the first driving portion 4211 is rotatably connected in the through hole, the other end of the first driving portion 4211 extends into the handle 11 and is provided with a second bevel gear engaged with the first bevel gear, one end of the second driving portion 4212 is rotatably connected to the through hole and is connected with the first driving portion 4211, the mutually connected ends of the first driving portion 4211 and the second driving portion 4212 are provided with clamping protrusions spaced around the central axis, the clamping protrusions are mutually engaged with each other to achieve the transmission connection, and the other end of the second driving portion 4212 extends into the neck 12 and is connected with the transmission assembly. When the rotating wheel 41 rotates, the first bevel gear and the second bevel gear can drive the first driving portion 4211 to rotate, the first driving portion 4211 can drive the second driving portion 4212 to rotate, and the second driving portion 4212 further drives the transmission assembly to move.

The second driving portion 4212 has a circular sliding groove coaxially formed on the circumferential side thereof, and the driving mechanism 42 further includes a plurality of balls interposed between the circular sliding groove and the inner wall 32221 of the through hole. 4213 specifically, the second driving portion 4212 has two annular sliding grooves spaced apart in the axial direction thereof, and balls are embedded between the two annular sliding grooves and the inner wall 32221 of the connecting sleeve 13, so as to reduce the friction between the second driving portion 4212 and the connecting sleeve 13, and ensure the smoothness of the second driving portion 4212 during rotation.

The end of the drive shaft 421 remote from the handle 11 is provided with a third bevel gear, and the drive assembly comprises a drive shaft (not shown) rotatably connected in the neck 12 and having one end connected to the third bevel gear, and a drive gear (not shown) rotatably connected to the other end of the drive shaft and connected to the gripping mechanism 3. The transmission ratio range of the transmission assembly is 3: 1-10: 1, preferably, the transmission ratio of the transmission assembly is 6: 1, specifically, the end of the second driving part 4212 far away from the first driving part 4211 is provided with a third bevel gear, the axial direction of the transmission shaft and the axial direction of the second driving part 4212 form an obtuse angle to adapt to the neck part 12 extending towards one side bending, one end of the transmission shaft can be provided with a fourth bevel gear, the transmission shaft is connected to the third bevel gear through the fourth bevel gear, the end of the transmission shaft far away from the handle part 11 is provided with a fifth bevel gear, the transmission gear is rotationally connected to the neck part 12, and the transmission gear is a bevel gear and is meshed with the fifth bevel gear. The driving shaft 421 can drive the driving shaft to rotate, the driving shaft can drive the transmission gear to rotate, and finally the transmission gear drives the clamping mechanism 3 to rotate, so that the effect of driving the functional component to rotate in a manual mode is achieved.

It should be understood that the above-mentioned arrangement of the transmission assembly is only an example, and in practical application, on the one hand, parameters of the third bevel gear, the fourth bevel gear, the fifth bevel gear and the like can be changed to adjust the transmission ratio adaptively, and on the other hand, a plurality of transmission rods and gears can be arranged to realize the transmission function from the driving shaft 421 to the clamping mechanism 3, for example, the transmission rods connected by the bevel gears can be used instead of the transmission rods.

The aircraft nose 2 is provided with the pilot hole, and fixture 3 assembles in the pilot hole, and fixture 3's one end has centre gripping hole 3221 and just to the opening part of pilot hole, and one side of aircraft nose 2 has the hole of stepping down that corresponds with transmission hole 3111, and transmission hole 3111 corresponds with the position in the hole of stepping down, and drive gear and meshing tooth 332 mesh. The tip of functional unit such as root canal file can assemble in centre gripping hole 3221, thereby realize its fixed connection, drive gear and fixture 3's meshing tooth 332 meshes, therefore, when drive gear was driven and rotates, fixture 3's clamping piece 32 can be driven and rotate, in order to realize driving the pivoted purpose of functional unit, furthermore, fixture 3's meshing tooth 332 and drive gear link to each other, meshing tooth 332 can realize the auto-lock, meshing tooth 332 can't drive gear and rotate promptly, drive assembly can block meshing tooth 332 and rotate when assembling or dismantling functional unit, in order to keep compressing tightly the relative position relation between cover 331 and the taut, and can not rotate, thereby be convenient for the operation of assembly and dismantlement.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A clamping mechanism is used for a root canal preparation machine, a power mechanism is arranged in the root canal preparation machine, and the clamping mechanism is characterized by comprising a casing, a clamping piece, a pressing component and an adjusting component, wherein the casing is provided with an accommodating space, the clamping piece comprises a tensioning column accommodated in the accommodating space and a chuck arranged at one end of the tensioning column, one end of the chuck, which is far away from the tensioning column, is provided with a clamping hole, the pressing component is sleeved outside the tensioning column and is positioned in the casing, the pressing component is used for being in transmission connection with the power mechanism, the adjusting component is assembled on the tensioning column and is connected with the pressing component, and the adjusting component can adjust the position of the pressing component in the axial direction of the tensioning column; when the pressing assembly moves towards the direction close to the chuck, the chuck can be driven to contract, so that the size of the clamping hole is reduced.

2. The clamping mechanism of claim 1, wherein the collet includes at least two clamping blocks disposed at one end of the tightening post and spaced around a central axis of the tightening post, each of the clamping blocks enclosing the clamping aperture.

3. The clamping mechanism as recited in claim 2, wherein the clamping block has an inner wall close to the clamping hole and an outer wall far from the clamping hole, an included angle is formed between the outer wall and a central axis of the tightening column, and a distance between the outer wall and the central axis is gradually increased from the tightening column to the direction of the clamping head.

4. The clamping mechanism as claimed in claim 3, wherein the tensioning column is hollow, and deformation notches are formed on two sides of the joint of the clamping head and the tensioning column.

5. A clamping mechanism according to any one of claims 1 to 4, wherein the adjustment member is threadedly connected to the tightening post remote from the collet end, the adjustment member abutting the side of the hold-down assembly remote from the collet.

6. A clamping mechanism according to claim 5, wherein the end of the tightening post remote from the clamping head protrudes to form a threaded post, one side of the adjustment member has a threaded hole adapted to the threaded post, and the other side of the adjustment member is provided with an internal polygonal counter bore.

7. The clamping mechanism as claimed in claim 5, wherein a transmission hole is formed in one side of the housing, the pressing assembly includes a pressing sleeve and a meshing tooth, the pressing sleeve is sleeved outside the tensioning column, one end of the pressing sleeve abuts against the outer side of the chuck, the other end of the pressing sleeve abuts against the adjusting member, the meshing tooth is arranged outside the pressing sleeve and corresponds to the transmission hole, and the transmission hole is used for allowing the power mechanism to be connected to the meshing tooth.

8. The clamping mechanism according to claim 7, wherein a pressing ring is formed by radially protruding the outer side of the pressing sleeve, which is close to the chuck, and a pressing inclined surface is formed on the inner side of the pressing sleeve, which corresponds to the pressing ring, and the pressing inclined surface abuts against the chuck, and the pressing inclined surface is gradually expanded radially outward in a direction toward the chuck.

9. The clamping mechanism as claimed in claim 7, wherein the housing includes a fitting cylinder and a fitting cover fixedly connected to one end of the fitting cylinder, the pressing sleeve further includes two sets of fitting bearings disposed outside the pressing sleeve and respectively located at two ends of the engaging teeth, an outer ring of the fitting bearing is fixed to an inner wall of the fitting cylinder, and the fitting cover abuts against one side of one of the fitting bearings.

10. A root canal preparation machine, characterized by comprising a handle, a head, a power mechanism and the clamping mechanism of any one of claims 1 to 9, wherein the head is arranged at one end of the handle, the clamping mechanism is arranged in the head, the power mechanism is assembled on the handle and connected to a pressing component of the clamping mechanism, and the power mechanism is used for driving the clamping member to rotate through the pressing component.

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