CN113333821B

CN113333821B - Deep hole drilling clamp for small orthopedic hollow screw

Info

Publication number: CN113333821B
Application number: CN202110853777.2A
Authority: CN
Inventors: 刘颖; 马丙栋; 康乐; 崔建强
Original assignee: Yantai Raphael Biotechnology Co ltd
Current assignee: Yantai Raphael Biotechnology Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2021-10-12
Anticipated expiration: 2041-07-28
Also published as: CN113333821A

Abstract

The invention discloses a deep hole drilling clamp for a small orthopedic hollow screw, and belongs to the technical field of medical instrument production. Including two deep-hole drilling machines, still include the workstation and set up screw anchor clamps and centering fixture on the workstation, centering sleeve and the coaxial setting of screw anchor clamps, centering fixture is equipped with two sets ofly, two the deep-hole drilling machine respectively with two sets of centering fixture sliding connection, and every deep-hole drilling machine and the coaxial setting of centering fixture. During operation, at first rotate ninety degrees with screw anchor clamps, screw anchor clamps's both ends are unimpeded this moment, the centre gripping hollow screw of being convenient for, the hollow screw that will treat processing carries out coaxial fixed, then centering anchor clamps work, through with the centering sleeve cooperation on the screw anchor clamps realize the centering to hollow screw, two deep hole drilling machine work with the coaxial setting of centering anchor clamps this moment, the effect of concentric drilling is carried out simultaneously to hollow screw's both sides, the emergence that leads to the fracture problem of the other end when only drilling to hollow screw's one end is prevented.

Description

Deep hole drilling clamp for small orthopedic hollow screw

Technical Field

The invention discloses a deep hole drilling clamp for a small orthopedic hollow screw, and belongs to the technical field of medical instrument production.

Background

The hollow screw is a medical fixing instrument suitable for internal fixation of fracture in orthopedic surgery, and a deep hole drill is needed to drill the hollow screw in the machining process. Hollow screw is when drilling, generally need use anchor clamps to it presss from both sides tightly fixedly, but because current anchor clamps structure is comparatively simple, the regulation of being not convenient for, can't be applicable to the processing of the screw of length difference, and operation process is comparatively loaded down with trivial details, wastes time and energy.

Chinese utility model patent of publication number CN210648656U among the prior art discloses a deep hole boring grab of hollow screw for small-size orthopedics nursing, the on-line screen storage device comprises a base, the inside of base is provided with the cavity, all be provided with the spout on the inside both ends lateral wall of cavity, the inside of spout all slides and is provided with the sliding block, and two the fixed backup pad that is provided with between the sliding block, the bottom both sides of backup pad are all fixed and are provided with the threaded rod, the bottom lateral wall of base is passed to the one end of threaded rod to the knob of fixed connection base below, the fixed second supporting seat that is provided with in upper end of base, the fixed clamping mechanism that is provided with in second supporting seat upper end.

Chinese utility model patent of publication number CN208374788U among the prior art discloses a deep hole boring grab for small-size orthopedics hollow screw, the on-line screen storage device comprises a base, the equal fixedly connected with support piece in lower extreme four corners department of base, the first bracing piece of upper end fixedly connected with of base, the both sides of first bracing piece all are equipped with the second bracing piece, the equal fixedly connected with backup pad in upper end of first bracing piece and second bracing piece, the lower extreme fixedly connected with sliding block of second bracing piece, the upper end of base is equipped with the recess, the sliding block be located the recess and with recess sliding connection, be equipped with the adjustment mechanism who is used for adjusting the sliding block in the recess, the equal fixedly connected with dead lever in upper end four corners department of base, four the same roof of upper end fixedly connected with of dead lever, the lower extreme of roof is equipped with clamping mechanism.

Above-mentioned utility model patent can be according to the height of the size regulation electric drill of processing screw size for the drilling rod of electric drill one end drills to the intermediate position of screw, improves the drilling quality of screw, nevertheless still has following problem: 1. unidirectional processing: when the hollow screw is machined, drilling is only carried out from one end of the hollow screw, and when the hollow screw is drilled through by using a deep hole drilling machine, the other end of the hollow screw is broken due to uneven stress on the other end of the hollow screw, so that waste is caused; 2. the centering can not be performed: if the hollow screw is processed in two directions, the deep hole drilling machines on two sides cannot be controlled to perform coaxial drilling.

Disclosure of Invention

The invention aims to provide a deep hole drilling clamp for a small orthopedic hollow screw, which aims to solve the technical problems that only one-way machining and centering cannot be performed in the prior art.

The invention provides a deep hole drilling clamp for a small orthopedic hollow screw, which comprises two deep hole drilling machines, a workbench, and a screw clamp and a centering clamp which are arranged on the workbench, wherein the screw clamp is rotationally connected with the workbench, the centering clamp is provided with two groups, the two groups of centering clamps are respectively in sliding connection with the workbench, the two groups of centering clamps are positioned at two sides of the screw clamp and are coaxially arranged with the screw clamp, the two deep hole drilling machines are respectively in sliding connection with the two groups of centering clamps, each deep hole drilling machine is coaxially arranged with the centering clamp, the screw clamp comprises a bidirectional screw rod sliding table and a clamping part, the clamping part comprises a clamping plate, a control ring and a convex block, the clamping plate is arranged at the top of the bidirectional screw rod sliding table, the control ring is rotationally arranged at the left side of the clamping plate, the convex blocks are three, the three convex blocks are uniformly arranged in the control ring according to a certain angle, and the three lugs are hinged with the control ring, the tails of the three lugs are hinged with the clamping plate, and each clamping plate is fixedly provided with a centering sleeve at the rear side and is coaxially arranged with the clamping plate.

Furthermore, the top of the bump is provided with an elastic non-slip mat.

Furthermore, the clamping parts are two groups, two groups of clamping parts are arranged on two sides of the bidirectional screw rod sliding table, and the two groups of clamping parts are fixedly connected with the output end of the bidirectional screw rod sliding table.

Further, still be equipped with the ring gear on the control ring, the upside of grip block is equipped with first gear, first gear and ring gear meshing, the rear side of grip block still is equipped with first motor, the main shaft of first motor runs through grip block and first gear fixed connection.

Further, the centering fixture comprises a screw rod sliding table, a side plate, a fixing sleeve, a rotating shaft, a first sleeve ring, a second sleeve ring and three tension components, wherein the side plate is arranged at the top of the workbench in a sliding mode, the side plate is connected with the screw rod sliding table in a threaded fit mode, the fixing sleeve is fixedly arranged on the left side of the side plate, the rotating shaft and the fixing sleeve are coaxially arranged, the rotating shaft penetrates through the fixing sleeve, threads are arranged at the output end of the rotating shaft, the first sleeve ring is arranged at the output end of the rotating shaft, the first sleeve ring and the rotating shaft are connected in a threaded fit mode, the second sleeve ring is fixedly arranged on the fixing sleeve, three tension components and the like are arranged on the periphery of the fixing sleeve, each tension component comprises a supporting plate, a first connecting rod and a second connecting rod, the inner side of the supporting plate is provided with a connecting plate, and the left side of the connecting plate is provided with a slide way, first connecting rod and second connecting rod cross-hinged set up, the tail end of first connecting rod is articulated with first lantern ring, and the top and the connecting plate of first connecting rod are articulated, the tail end and the second lantern ring of second connecting rod are articulated, the top and the slide sliding connection of second connecting rod, the deep hole rig sets up on the right side of curb plate, and the output of deep hole rig runs through the rotation axis.

Furthermore, a second gear is further arranged at the right end of the rotating shaft, a third gear and a second motor are arranged on the right side of the side plate, the third gear is meshed with the second gear, and a spindle of the second motor is fixedly connected with the third gear.

Furthermore, each outer wall of the supporting plate is provided with a cambered surface, and the radian of the cambered surface of the outer wall of the supporting plate is the same as that of the inner wall of the centering sleeve.

Compared with the prior art, the invention has the beneficial effects that:

(1) when the hollow screw centering device works, the screw clamp is rotated ninety degrees, both ends of the screw clamp are unobstructed, the control ring rotates to drive the three convex blocks to rotate by taking the hinged part of the tail part and the clamping plate as an axis, so that the space between the three convex blocks is controlled, the hollow screws with different diameters are concentrically clamped, the hollow screws to be processed are fixed, as the clamping plate is coaxial with the centering sleeve, the hollow screws are coaxial with the centering sleeve, then the centering clamp works, the centering of the hollow screws is realized by matching with the centering sleeve on the screw clamp, two deep hole drilling machines coaxially arranged with the centering clamp work simultaneously, the effect of simultaneously concentrically drilling both sides of the hollow screws is realized, the problem that the other end is broken when only one end of the hollow screws is drilled is prevented, and the centering sleeve is arranged so that the centering clamp can conveniently center the hollow screws, and the problem that the scraps scatter around when the deep hole drilling machine drills the hollow screw is also prevented.

(2) The two groups of clamping components are arranged, so that two ends of the hollow screw can be clamped at the same time, the stability in processing the hollow screw is ensured, and the space between the two groups of clamping components is controlled by the bidirectional screw rod sliding table, so that the hollow screw can adapt to hollow screws with different lengths.

(3) When the rotating shaft rotates, the first sleeve ring which is in threaded fit with the rotating shaft can be driven to move on the rotating shaft, at the moment, each group of the first connecting rod and the second connecting rod can rotate by taking the hinged part between the first connecting rod and the second connecting rod as a shaft to drive the supporting plates to expand or contract, and when the three supporting plates are simultaneously expanded, the three supporting plates can abut against the inner wall of the centering sleeve, so that the three supporting plates can be concentrically matched and fixed with the centering sleeve, and the centering of the deep hole drilling machine and the hollow screw is realized.

The cambered surface is arranged on the outer wall of each supporting plate, so that the friction force between the supporting plates and the centering sleeve is increased when the supporting plates are opened, and the centering sleeve can be clamped more stably when the centering clamp works.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic perspective view of a first working state of the present invention;

FIG. 2 is a schematic perspective view of a second working state of the present invention;

FIG. 3 is a perspective view of the screw clamp of the present invention;

FIG. 4 is an exploded view of the clamping member of the present invention;

FIG. 5 is a schematic perspective view of a centering fixture according to the present invention;

FIG. 6 is a schematic view of a first operating state of the centering fixture of the present invention;

FIG. 7 is a schematic view of a second working condition of the centering fixture of the present invention;

fig. 8 is a schematic perspective view of a bracing plate according to the present invention.

Reference numerals: 1. a deep hole drilling machine; 2. a work table; 3. a screw clamp; 31. a bidirectional screw rod sliding table; 32. a clamping member; 321. a clamping plate; 322. a control loop; 323. a bump; 324. a toothed ring; 325. a centering sleeve; 326. a first motor; 327. a first gear; 4. a centering jig; 41. a screw rod sliding table; 42. a side plate; 43. fixing the sleeve; 44. a rotating shaft; 45. a first collar; 46. a second collar; 47. a folding and unfolding component; 471. a supporting plate; 472. a first link; 473. a second link; 474. a connecting plate; 475. a slideway; 48. a second gear; 49. a third gear; 410. a second motor.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, an embodiment of the present invention provides a deep hole drilling jig for a small orthopedic hollow screw, including two deep hole drilling machines 1, further including a workbench 2, and a screw clamp 3 and a centering clamp 4 disposed on the workbench 2, where the screw clamp 3 is rotatably connected to the workbench 2, the screw clamp 3 is provided with a centering sleeve 325 for assisting centering, the centering sleeve 325 is disposed coaxially with the screw clamp 3, the centering clamps 4 are provided with two sets, the two sets of centering clamps 4 are respectively slidably connected to the workbench 2, the two sets of centering clamps 4 are disposed at two sides of the screw clamp 3 and coaxially with the screw clamp 3, the two deep hole drilling machines 1 are respectively slidably connected to the two sets of centering clamps 4, and each deep hole drilling machine 1 is disposed coaxially with the centering clamp 4, when the control ring 322 rotates, the three convex blocks 323 can be driven to rotate around a hinge joint of the tail portion and the clamping plate 321, thereby controlling the space between the three bumps 323 and realizing the concentric clamping of the hollow screws with different diameters. During operation, at first with screw anchor clamps 3 rotation ninety degrees, screw anchor clamps 3's both ends are unimpeded this moment, be convenient for centre gripping hollow screw, hollow screw that will treat processing carries out coaxial fixed, rethread centering anchor clamps 4 work, through with the centering sleeve 325 cooperation realization on screw anchor clamps 3 to the centering of hollow screw, two deep hole drilling machines 1 simultaneous working of coaxial setting of centering anchor clamps 4 this moment, the effect of concentric drilling is carried out simultaneously to hollow screw's both sides, the emergence that leads to the other end fracture problem when only drilling to hollow screw's one end is prevented, and the setting of centering sleeve 325 not only is convenient for centering anchor clamps 4 to carry out centering operation to hollow screw, and the emergence of sweeps problem all around when having prevented deep hole drilling machine 1 from carrying out the drilling to hollow screw.

Preferably, an elastic anti-slip pad is arranged at the top of the bump 323, and when the bump 323 coaxially clamps the hollow screw, the elastic anti-slip pad on the bump 323 can protect the hollow screw from deformation and increase the friction force between the bump 323 and the hollow screw.

Preferably, the screw clamp 3 includes two-way lead screw slip table 31 and two sets of hold assembly 32, and is two sets of hold assembly 32 sets up in the both sides of two-way lead screw slip table 31, and two sets of hold assembly 32 and two-way lead screw slip table 31's output fixed connection, and the both ends that hollow screw can be held simultaneously in the setting of two sets of hold assembly 32, stability when guaranteeing to process hollow screw, and the interval through two-way lead screw slip table 31 control two sets of hold assembly 32, the hollow screw of adaptable different length.

Preferably, the control ring 322 is further provided with a toothed ring 324, the upper side of the clamping plate 321 is provided with a first gear 327, the first gear 327 is engaged with the toothed ring 324, the rear side of the clamping plate 321 is further provided with a first motor 326, a main shaft of the first motor 326 penetrates through the clamping plate 321 and is fixedly connected with the first gear 327, when the first motor 326 works, the control ring 322 is driven to rotate by the first gear 327 engaged with the toothed ring 324, and when the control ring 322 rotates, the three convex blocks 323 can be driven to rotate by taking the hinged position of the tail part and the clamping plate 321 as a shaft, so that the distance between the three convex blocks 323 is controlled, the concentric clamping of the hollow screws with different diameters is realized, and the universality of the invention is improved.

Preferably, the centering fixture 4 includes lead screw slip table 41, curb plate 42, fixed sleeve 43, rotation axis 44, first lantern ring 45, second lantern ring 46 and three receipts and opens the subassembly 47, curb plate 42 slides and sets up the top at workstation 2, just curb plate 42 passes through screw-thread fit with lead screw slip table 41 and is connected, fixed sleeve 43 is fixed to be set up in the left side of curb plate 42, rotation axis 44 runs through fixed sleeve 43 with the coaxial setting of fixed sleeve 43 and rotation axis 44, be equipped with the screw on the output of rotation axis 44, first lantern ring 45 sets up on the output of rotation axis 44, and first lantern ring 45 passes through screw-thread fit with rotation axis 44 and is connected, second lantern ring 46 is fixed to be set up on fixed sleeve 43, and is three receive and open the setting of angles such as subassembly 47 in the periphery of fixed sleeve 43, every group receive and open the subassembly 47 all include fagging 471, the setting of angles, The deep hole drilling machine comprises a first connecting rod 472 and a second connecting rod 473, a connecting plate 474 is arranged on the inner side of a supporting plate 471, a slide rail 475 is arranged on the left side of the connecting plate 474, the first connecting rod 472 and the second connecting rod 473 are arranged in a cross hinge mode, the tail end of the first connecting rod 472 is hinged to a first collar 45, the top end of the first connecting rod 472 is hinged to the connecting plate 474, the tail end of the second connecting rod 473 is hinged to a second collar 46, the top end of the second connecting rod 473 is connected with the slide rail 475 in a sliding mode, the deep hole drilling machine 1 is arranged on the right side of a side plate 42, and the output end of the deep hole drilling machine 1 penetrates through a rotating shaft 44.

Preferably, a second gear 48 is further disposed at the right end of the rotating shaft 44, a third gear 49 and a second motor 410 are disposed at the right side of the side plate 42, the third gear 49 is engaged with the second gear 48, and a spindle of the second motor 410 is fixedly connected with the third gear 49. When the second motor 410 is operated, the rotating shaft 44 is driven to rotate by the third gear 49 engaged with the second gear 48, and when the rotating shaft 44 rotates, the first sleeve ring 45 in threaded fit with the rotating shaft 44 is driven to move on the rotating shaft 44, and at this time, each set of the first link 472 and the second link 473 rotates around the hinge between the two, and drives the supporting plate 471 to expand or contract, so as to be concentrically fitted and fixed with the centering sleeve 325.

Preferably, every all be equipped with the cambered surface on the outer wall of fagging 471, and the outer wall cambered surface radian of fagging 471 is the same with centering sleeve 325's inner wall radian, is convenient for fagging 471 to open when contacting completely with centering sleeve 325, has increased the frictional force between fagging 471 and the centering sleeve 325 for the centre gripping effect is more firm.

The working principle is as follows: when the invention works, firstly, the screw clamp 3 is rotated ninety degrees, at the same time, two ends of the screw clamp 3 are unobstructed, so that a hollow screw can be clamped conveniently, then the first motor 326 works, the first gear 327 meshed with the toothed ring 324 drives the control ring 322 to rotate, when the control ring 322 rotates, the three lugs 323 can be driven to rotate by taking the hinged part of the tail part and the clamping plate 321 as an axis, so as to control the distance between the three lugs 323, the hollow screw to be processed is coaxially fixed, after the coaxial fixation, the screw clamp 3 is rotated and reset, then when the second motor 410 works, the third gear 49 meshed with the second gear 48 drives the rotating shaft 44 to rotate, when the rotating shaft 44 rotates, the first lantern ring 45 in threaded fit with the rotating shaft 44 can be driven to move on the rotating shaft 44, at the moment, each group of the first connecting rod 472 and the second connecting rod 473 can rotate by taking the hinged part between the first connecting rod and the second connecting rod as an axis, drive fagging 471 and open or shrink, it is fixed to be convenient for carry out concentric cooperation with centering sleeve 325, this moment with two deep-hole drill 1 simultaneous workings of the coaxial setting of centering fixture 4, the effect of concentric drilling is carried out simultaneously to hollow screw's both sides, the emergence that leads to other end fracture problem when only drilling is carried out to hollow screw's one end, and centering sleeve 325's setting not only is convenient for centering fixture 4 and carries out centering operation to hollow screw, and the emergence of the drift problem of sweeps everywhere when deep-hole drill 1 drills to hollow screw has been prevented.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a deep hole boring grab for small-size orthopedics hollow screw, includes two deep hole rigs (1), its characterized in that, including workstation (2) and screw anchor clamps (3) and centering anchor clamps (4) of setting on workstation (2), screw anchor clamps (3) rotate with workstation (2) and are connected, centering anchor clamps (4) are equipped with two sets ofly, two centering anchor clamps (4) respectively with workstation (2) sliding connection, and two sets of centering anchor clamps (4) are located the both sides of screw anchor clamps (3) and with screw anchor clamps (3) coaxial setting, two deep hole rigs (1) respectively with two sets of centering anchor clamps (4) sliding connection, and every deep hole rig (1) and centering anchor clamps (4) coaxial setting, screw anchor clamps (3) include two-way lead screw (31) and clamping part (32), clamping part (32) include grip block (321), The clamping plate (321) is arranged at the top of the bidirectional screw rod sliding table (31), the control ring (322) is rotatably arranged on the left side of the clamping plate (321), three lugs (323) are arranged and are evenly arranged inside the control ring (322) according to a certain angle, the three lugs (323) are hinged to the control ring (322), the tail portions of the three lugs (323) are hinged to the clamping plate (321), a centering sleeve (325) is fixedly arranged on the rear side of each clamping plate (321), and the centering sleeve (325) and the clamping plate (321) are coaxially arranged; centering fixture (4) include lead screw slip table (41), curb plate (42), fixed sleeve (43), rotation axis (44), first lantern ring (45), second lantern ring (46) and three receipts subassembly (47), curb plate (42) slide to be set up at the top of workstation (2), just curb plate (42) are connected through screw-thread fit with lead screw slip table (41), fixed sleeve (43) are fixed to be set up in the left side of curb plate (42), rotation axis (44) and fixed sleeve (43) coaxial setting and rotation axis (44) run through fixed sleeve (43), be equipped with the screw thread on the output of rotation axis (44), first lantern ring (45) set up on the output of rotation axis (44), and first lantern ring (45) are connected through screw-thread fit with rotation axis (44), second lantern ring (46) are fixed to be set up on fixed sleeve (43), the three folding and unfolding components (47) are arranged on the periphery of the fixed sleeve (43) at equal angles, each set of folding and unfolding component (47) comprises a supporting plate (471), a first connecting rod (472) and a second connecting rod (473), the inner side of the bracing plate (471) is provided with a connecting plate (474), the left side of the connecting plate (474) is provided with a slideway (475), the first connecting rod (472) and the second connecting rod (473) are arranged in a cross hinged mode, the tail end of the first connecting rod (472) is hinged with the first sleeve ring (45), the top end of the first connecting rod (472) is hinged with the connecting plate (474), the tail end of the second connecting rod (473) is hinged with the second sleeve ring (46), the top end of the second connecting rod (473) is connected with the slide way (475) in a sliding way, the deep hole drilling machine (1) is arranged on the right side of the side plate (42), and the output end of the deep hole drilling machine (1) penetrates through the rotating shaft (44).

2. The deep-hole drill clamp for the small-sized hollow bone screw according to claim 1, wherein an elastic anti-slip pad is arranged at the top of the convex block (323).

3. The deep hole drill clamp for the small-sized hollow screw for orthopedics department as claimed in claim 1, characterized in that the clamping components (32) are provided in two groups, the two groups of clamping components (32) are arranged on two sides of the bidirectional screw rod sliding table (31), and the two groups of clamping components (32) are fixedly connected with the output end of the bidirectional screw rod sliding table (31).

4. The deep hole drill jig for the small orthopedic cannulated screw according to claim 1, characterized in that a toothed ring (324) is further disposed on the control ring (322), a first gear (327) is disposed on an upper side of the clamping plate (321), the first gear (327) is engaged with the toothed ring (324), a first motor (326) is further disposed on a rear side of the clamping plate (321), and a main shaft of the first motor (326) penetrates through the clamping plate (321) and is fixedly connected with the first gear (327).

5. The deep hole drill jig for the small-sized hollow screw for orthopedics department according to claim 1, characterized in that a second gear (48) is further arranged at the right end of the rotating shaft (44), a third gear (49) and a second motor (410) are arranged at the right side of the side plate (42), the third gear (49) is meshed with the second gear (48), and the main shaft of the second motor (410) is fixedly connected with the third gear (49).

6. The deep hole drill clamp for the small-sized hollow screw for orthopedics department as claimed in claim 1, characterized in that an arc surface is arranged on the outer wall of each supporting plate (471), and the radian of the arc surface of the outer wall of each supporting plate (471) is the same as that of the inner wall of the centering sleeve (325).