CN106618698B - A kind of seven freedom shin bone unilateral external fixator - Google Patents
A kind of seven freedom shin bone unilateral external fixator Download PDFInfo
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- CN106618698B CN106618698B CN201610951473.9A CN201610951473A CN106618698B CN 106618698 B CN106618698 B CN 106618698B CN 201610951473 A CN201610951473 A CN 201610951473A CN 106618698 B CN106618698 B CN 106618698B
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- extension rod
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- rotational body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6441—Bilateral fixators, i.e. with both ends of pins or wires clamped
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/645—Devices extending alongside the bones to be positioned comprising a framework
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6466—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod
- A61B17/6475—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod the connecting rod being threaded
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6491—Devices extending alongside the bones to be positioned allowing small-scale motion of bone ends
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/66—Alignment, compression or distraction mechanisms
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Abstract
The present invention provides a kind of seven freedom shin bone unilateral external fixator, the fixator includes the revolute pair of proximal end three, three revolute pairs in distal end and a prismatic pair, by structure compositions such as proximal end spicule bracket, proximal end central rotational body, proximal end extension rod clamp, extension rod, distal end extension rod clamp, distal end central rotational body, distal bone needle racks.Central rotational body is connect by extension rod clamp gear with extension rod clamp tooth socket, and central rotational body realizes the rotation around 360 degree of y-axis relative to extension rod clamp；The extension rod clamp is connected by extension rod nut with extension rod, and the two realizes that the angle around 360 degree of z-axis is fixed；Proximal end revolute pair and distal end revolute pair have symmetrically the same connection.The present invention realizes that proximal tibia and distal tibia are aligned in the pose of X, Y, Z-direction, and the function of axial pressure is realized in the fracture stabilization later period, solves the disadvantage that unilateral fixator adjustable range is small, flexibility is poor.The fixator also has many advantages, such as that structure is simple, easy to use.
Description
Technical field
The invention belongs to surgical medical equipment fields, and in particular to a kind of seven freedom for treating fracture of tibia correction is unilateral
External fixator.
Background technique
Fracture of tibia is a kind of large numbers of common orthopaedic diseases.Administer this disease conventional method be fixed with gypsum,
Traction or open reduction and Kirschner wire fixation, patient usually require to lie in bed for three months, usually cause anchylosis.With External technique
Development, exterior fixing rack has become being rapidly developed together for tool important in orthopaedics therapy, wherein
Llizarov loopful formula external fixator is more prominent, is the major progress of exter-nal fixer technical field.The technology of Llizarov
Also exciting countless orthopaedics allows doctor to the interest of the study of bone External technique, research and application.1984, Bastiani etc.
A kind of unilateral power unilateral external fixation has been invented, operation difficulty is simplified.Ao school also identify exter-nal fixer opening,
Application value in infected fracture has developed a kind of tubulose external fixator.American J Charles Taylor in 1994 etc.
People is modified to " Spatial infrastructure " on the basis of llizarow annular external fixator ' (Taylor Spatial is fixed outside
Frame, abbreviation TSF), Taylor external fixator is a kind of six telescopic connecting rods to be connected obliquely in proximal-distal ring
On, and the hole ring type external fixator that can be rotated freely at tie point, the fixator are exactly famous " Taylor space frame
Frame ".
Although these external fixators have the advantages that the uniqueness and application value of oneself, itself is also existed simultaneously not
Foot, external fixator structure bulky in parallel is inflexible, brings the functional rehabilitation of patient after surgery difficult and inconvenient, due to
The early stage limitation of unilateral external fixator joint angles adjusting range causes flexibility to be restricted, and has a single function, and treats big become
The fracture of shape is corrected difficult.Therefore according to " orthopaedics Natural Reconstruction theory ": the fracture strong fixation of early implementation, fracture mid-term provide
The flexible fastening of axial and combined stress stimulation, later period provide balance and fix this theory, and design one can be solved preferably
Unilateral external fixator adjustable range is small, the problem of flexibility difference, answers unilateral external fixator in large deformation fracture correction
With being significantly.
Summary of the invention
The technical problem to be solved by the present invention is to it is big to provide a kind of joint adjustable range.Flexibility is big and can be realized
The unilateral external fixator being association of activity and inertia will solve the problems, such as that the correction of large deformation fracture of tibia is difficult, guarantee joint appointing in corner
Position realization of anticipating is fixed, and structure is simple, easy to use.The fixator is mainly by the revolute pair and a movement of six decentractions
Pair composition can be realized the correction of space three-dimensional ostealleosis and the phase have the function of axial pressure after the fracture.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of seven freedom shin bone unilateral external fixator, it is characterised in that: including proximal end spicule bracket (5), extension rod
(1), proximal end central rotational body (9), proximal end extension rod clamp (16), distal end extension rod clamp (27), distal end central rotational body
(29), distal bone needle rack (38): the proximal end spicule bracket (5) can realize x-axis 180 degree around proximal end central rotational body (9)
Rotation, proximal end central rotational body (9) opposite proximal end extension rod clamp (16) can be realized the rotation around 360 degree of y-axis, and proximal end is prolonged
Long stick clamp (16) can be realized the rotation around 360 degree of z-axis, proximal end extension rod clamp (16) and distal end relative to extension rod (1)
Extension rod clamp (27) realizes moving along z-axis 60mm relative to the axis of extension rod (1)；The both ends of extension rod (1) rotate
Body is symmetrical structure, and distal end extension rod clamp (27) realizes the rotation around 360 degree of z-axis relative to extension rod (1), and distal end is intermediate to be turned
Kinetoplast (29) opposite proximal end extension rod clamp (27) is realized in 360 degree of y-axis of rotation, distal bone needle rack (38) opposite proximal end
Between rotor (29) can be realized the rotation around x-axis.
Further, the extension rod (1) is by extension rod outer bar (1-2), extension rod interior bar (1-1), threads of lead screw bar (2-
1), nut screw boss (2-2), feed screw nut (2-3), nut screw card slot (2-4), lead screw bearing (3) and circlip (4) group
At: hollow extension rod interior bar (1-1) is connected by screw thread and threads of lead screw bar (2-1), and the lower end of threads of lead screw bar (2-1) is
Nut screw boss (2-2), lead screw bearing (3) are mounted on nut screw boss (2-2), and circlip (4) is mounted on lead screw bearing
(3) between feed screw nut (2-3), extension rod outer bar (1-2) is connected by lead screw bearing (3) and nut screw boss (2-2),
Lead screw bearing (3) is fixedly connected by circlip (4) with feed screw nut (2-3), and nut screw card slot (2-4) is in feed screw nut (2-
3) bottom end realizes that extension rod interior bar (1-1) prolongs with respect to the edge extension rod outer bar (1-2) by rotating nuts lead screw card slot (2-4)
Long mandrel line moves up and down movement, constitutes prismatic pair.
Further, the proximal end spicule bracket (5) is by under proximal end spicule pedestal upper end lid (5-1), proximal end spicule bracket
End cap (5-2), proximal end spicule bracket left screw (7-1), proximal end spicule bracket right screw (7-2), proximal end left side spring (6-
1), spring (6-2) and proximal end spicule bracket needle tray (5-3) composition on the right side of proximal end: proximal end spicule pedestal upper end lid (5-1) passes through close
Hold spicule bracket left screw (7-1) and proximal end spicule bracket right screw (7-2) and proximal end spicule pedestal lower end lid (5-2) even
It connects；Spring (6-1) is mounted on the left of the spicule pedestal upper end lid of proximal end in threaded hole (5-4) on the left of proximal end, spring (6- on the right side of proximal end
2) it is mounted on the right side of the spicule pedestal upper end lid of proximal end in threaded hole (5-7), proximal end spicule bracket left screw (7-1) and proximal end bone
Needle rack right screw (7-2) is compressed proximal end spicule (8) by spring (6-2) on the right side of spring (6-1) on the left of proximal end and proximal end
In proximal end spicule bracket needle tray (5-3), the fixation of proximal end spicule (8) is realized.
Further, the proximal end spicule bracket (5) is by under proximal end spicule pedestal upper end lid (5-1) and proximal end spicule bracket
End cap (5-2) composition, the right end of proximal end spicule pedestal lower end lid (5-2) is proximal end spicule bracket rotary body (5-5), proximal end spicule
It is provided in bracket rotary body (5-5) embedded tooth socket (5-6), the left side of proximal end central rotational body (9), which exists, stretches out rotation portion (9-
1)；Proximal end spicule bracket rotary body (5-5) is inserted into proximal end central rotational body and stretches out between rotation portion (9-1) and by proximal end
Between rotor gear (11) link together, proximal end spicule bracket rotary body (5-5) by proximal end spicule bracket embed tooth socket (5-
6) and proximal end central rotational body gear (11) connection, proximal end splined shaft (10) and proximal end central rotational body gear (11) are connected to one
It rises.
Further, the shaft end of proximal end splined shaft (10) is provided with proximal end splined shaft grooving surface (10-1) and proximal end spline spiral shell
Line (10-2), proximal end central rotational body (9) are real by rotation proximal end splined shaft grooving surface (10-1) and proximal end spicule bracket (5)
It now relatively rotates, constitutes revolute pair.
Further, there are concave surface (9-2), proximal end spline in the bottom end that central rotational body in proximal end stretches out rotation portion (9-1)
Bottom end bearing (14-1) is mounted in proximal end central rotational body concave surface (9-2), and wherein proximal end splined shaft (10) passes through proximal end flower
Key bottom end bearing (14-1) and proximal end central rotational body stretch out rotation portion (9-1) connection, and proximal end splined shaft (10) passes through proximal end
Spline upper end bearing (14-2) and proximal end bearing (ball) cover (12) connection, proximal end cap nut (13) pass through proximal end lock washer (15)
It is pressed on proximal end bearing (ball) cover (12), proximal end cap nut (13) passes through proximal end spline thread (10-2) and proximal end splined shaft
(10) it connects, proximal end splined shaft (10) is pressed in proximal end central rotational body concave surface (9-2) by proximal end cap nut (13).
Further, there are a projecting shaft (9-3), proximal end central rotational body in the lower end of the proximal end central rotational body (9)
One proximal end extension rod clamp gear (17) is installed, the proximal end central rotational body (9) is prolonged by proximal end beside projecting shaft (9-3)
Long stick clamp gear (17) and proximal end extension rod clamp (16) connection, proximal end extension rod clamp gear (17) pass through proximal end extension rod
Clamp tooth socket (16-1) and proximal end extension rod clamp (16) connection；Proximal end central rotational body (9) passes through rotation proximal end extension rod card
Sub- gear shaft (17-1) and proximal end extension rod clamp (16) form the mutual rotation around proximal end central rotational body projecting shaft (9-3),
Constitute revolute pair；Proximal end central rotational body upper end bearing (18-1) and close is mounted on proximal end extension rod clamp gear shaft (17-1)
It holds central rotational body bottom end bearing (18-2), the bearings at both ends is separately mounted to the upper and lower surface of proximal connecting end lid (19),
Proximal end central rotational body (9) is connected by the upper surface of proximal end central rotational body upper end bearing (18-1) and proximal connecting end lid (19)
It connects, proximal connecting end lid (19) passes through the lower surface of proximal end central rotational body bottom end bearing (18-2) and proximal connecting end lid (19)
Connection；Proximal end extension rod clamp gear nut (20) is pressed on proximal end central rotational body (9) by proximal end check washer (21).
Further, proximal end extension rod clamp bearing (22) is mounted on the lower end of proximal end central rotational body projecting shaft (9-3)
And on proximal end extension rod clamp concave surface (16-3), proximal end central rotational body projecting shaft (9-3) passes through proximal end extension rod card
Sub- bearing (22) and proximal end extension rod clamp indent hole axle (16-2) connection, proximal connecting end lid (19) is by proximal end extension rod clamp
Bearing (22) is pressed on proximal end extension rod clamp concave surface (16-3), and proximal end central rotational body projecting shaft (9-3) passes through close
Extension rod clamp bearing (22) and proximal end extension rod clamp indent hole axle (16-2) are held to form relative rotation motion of driving system；Proximal connecting end
Lid (19) is fixed on proximal end extension rod clamp (16) by proximal end fastening long spiro nail (23)；Proximal end central rotational body (9) passes through
Proximal end fastening long spiro nail (23) and proximal end extension rod clamp (16) are fixed together, and proximal end fastens long spiro nail (23) and locked by proximal end
Tight washer (24) is fixed on proximal end central rotational body (9).
Further, the proximal connecting end lid (19) passes through proximal connecting end lid screw (25) and proximal end central rotational body
(9) it is fixed together.
Further, the proximal end extension rod clamp (16) is mounted on extension rod interior bar (1-1), distal end extension rod clamp
(27) it is mounted on extension rod outer bar (1-2)；Proximal end extension rod clamp (16) passes through proximal end extension rod screw (26-2) and proximal end
Extension rod nut (26-1) is fixed together with extension rod interior bar (1-1), extension rod interior bar (1-1) and proximal end extension rod clamp
(16) 360 degree be may be implemented mutually to rotate, constitute revolute pair；Distal end extension rod clamp (27) passes through distal end extension rod screw (28-
2) it is fixed together with distal end extension rod nut (28-1) with extension rod outer bar (1-2), extension rod outer bar (1-2) and distal end extend
Stick clamp (27) may be implemented 360 degree and mutually rotate, and constitute revolute pair.
The structure of fixator is symmetrical structure, the company of the distal end extension rod clamp (27) and distal end central rotational body (29)
It is the same for connecing with the connection of proximal end extension rod clamp (16) and proximal end central rotational body (9), is briefly described as follows.
Further, the distal end central rotational body (29) passes through distal end extension rod clamp gear (30) and distal end extension rod
Clamp (27) connection, distal end extension rod clamp gear (30) pass through distal end extension rod clamp tooth socket (27-1) and distal end extension rod card
Sub (27) connection；Distal end central rotational body (29) passes through rotating distal end extension rod clamp gear shaft (30-1) and distal end extension rod card
Sub (27) form the mutual rotation around distal end central rotational body projecting shaft (29-3), constitute revolute pair；Distal end central rotational body
(29) it is connected by distal end central rotational body upper end bearing (31-1) with the upper surface of Distal coupling end lid (32), Distal coupling end
Lid (32) is connected by distal end central rotational body bottom end bearing (31-2) with the lower surface of Distal coupling end lid (32)；Distal end extends
Stick clamp gear nut (33) is pressed on distal end central rotational body (29) by distal end check washer (34).Distal end central rotational
Body projecting shaft (29-3) is connected by distal end extension rod clamp bearing (35) and distal end extension rod clamp indent hole axle (27-2), far
End connection end cap (32) is pressed on distal end extension rod clamp bearing (35), and distal end central rotational body projecting shaft (29-3) passes through remote
Connection end cap (32) and distal end extension rod clamp indent hole axle (27-2) are held to form relative rotation motion of driving system；Distal coupling end lid (32)
Long spiro nail (32-1) is fastened by distal end to be fixed on distal end extension rod clamp (27)；Distal end central rotational body (29) passes through distal end
Fastening long spiro nail (36) and distal end extension rod clamp (27) are fixed together, and distal end fastens long spiro nail (36) and passes through distal end lock pad
Circle (37) is fixed on distal end central rotational body (29)；Distal coupling end lid (32) by Distal coupling end lid screw (32-1) and
Distal end central rotational body (29) is fixed together.
The connection of the distal end central rotational body (29) and distal bone needle rack (38) and proximal end central rotational body (9) and closely
End spicule bracket (5) connection be it is the same, be briefly described as follows.
Further, distal bone needle rack rotary body (38-4) the insertion distal end central rotational body stretches out rotation portion
It links together between (29-1) and by distal end central rotational body gear (39), distal bone needle rack rotary body (38-4) passes through
Distal bone needle rack embeds tooth socket (38-5) and distal end central rotational body gear (39) connects, in distal end splined shaft (40) and distal end
Between rotor gear (39) link together；The shaft end of distal end splined shaft (40) be provided with distal end splined shaft grooving surface (40-1) and
Distal end spline thread (40-2), distal end central rotational body (29) pass through rotating distal end splined shaft grooving surface (40-1) and distal bone
Needle rack (38), which is realized, to be relatively rotated, and revolute pair is constituted；Distal end splined shaft (40) by distal end spline bottom end bearing (41-1) and
Distal end central rotational body stretches out rotation portion (29-1) connection, and distal end splined shaft (40) passes through distal end spline upper end bearing (41-2)
It is connected with distal end bearing (ball) cover (42), distal end cap nut (43) is pressed on distal end bearing (ball) cover by distal end lock washer (44)
(42) on, distal end cap nut (43) is connected by distal end spline thread (40-2) and distal end splined shaft (40), distal end splined shaft
(40) distal end central rotational body is compressed by distal end cap nut (43) stretch out rotation portion (29-1)；Distal bone needle rack upper end
It covers (38-1) and passes through distal bone needle rack left screw (45-1) and distal bone needle rack right screw (45-2) and distal end spicule
Pedestal lower end lid (38-2) connection；Distal bone needle rack left screw (45-1) and distal bone needle rack right screw (45-2) are logical
It crosses distal left spring (46-1) and Distal Right spring (46-2) and distal end spicule (47) is pressed on distal bone needle rack needle tray
In (38-3), the fixation of distal end spicule (47) is realized.
The present invention due to using the technology described above, realizes the unilateral external fixator of the large deformation reduction of the fracture, and structure
Simply, easy to use, small in size, manufacturing cost is low, not only ensure that the big fracture correction 360 degree of space, preferable to solve
The problems such as unilateral external fixator joint adjustable range is small, flexibility is poor, and the unilateral external fixator is in the reduction of the fracture later period
Can be in the function of fracture end realization axial pressure, furthermore the fixator can be also used for the operative treatment of tibia lengthening.
A kind of seven freedom shin bone unilateral external fixator of the invention is described further with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is a kind of overall structure schematic three dimensional views of unilateral external skeletal fixation device for tibia of the present invention；
Fig. 2 is a kind of overall structure top view of unilateral external skeletal fixation device for tibia of the present invention；
Fig. 3 is a kind of extension rod cross-sectional view of the structure of unilateral external skeletal fixation device for tibia of the present invention；
Fig. 4 is a kind of proximal end spicule supporting structure sectional view of unilateral external skeletal fixation device for tibia of the present invention；
A kind of proximal end central rotational body of unilateral external skeletal fixation device for tibia of Fig. 5 (a), (b), (c) the respectively present invention and proximal end
Spicule bracket connects front view, top view, side view；
Fig. 6 (a), (b) are respectively the present invention a kind of the proximal end central rotational body and proximal end spicule of unilateral external skeletal fixation device for tibia
Bracket connects B-B sectional view, proximal end splined shaft schematic three dimensional views；
Fig. 7 is that a kind of proximal end central rotational body of unilateral external skeletal fixation device for tibia of the present invention connects C-C with proximal end spicule bracket
Cross-sectional view；
Fig. 8 (a), (b), (c), (d) are divided into the proximal end central rotational body of a kind of unilateral external skeletal fixation device for tibia of the present invention and close
Extension rod clamp is held to connect front view, top view, side view, axis side view；
Fig. 9-11 is respectively the present invention a kind of the proximal end central rotational body and proximal end extension rod card of shin bone unilateral external fixator
D-D cross-sectional view, E-E cross-sectional view and the F-F cross-sectional view of son connection；
Figure 12, which connects for a kind of proximal end central rotational body of unilateral external skeletal fixation device for tibia of the present invention with proximal end bearing (ball) cover, to be shown
It is intended to；
Figure 13 is the present invention a kind of proximal end extension rod clamp, distal end extension rod clamp and the extension of unilateral external skeletal fixation device for tibia
Stick connection schematic diagram；
Figure 14, which connects for a kind of unilateral external skeletal fixation device for tibia distal end extension rod clamp of the present invention with distal end central rotational body, to be shown
It is intended to；
Figure 15 is a kind of unilateral external skeletal fixation device for tibia distal end central rotational body of the present invention and distal bone needle rack connection signal
Figure
Figure 16 is a kind of use state diagram of unilateral external skeletal fixation device for tibia of the present invention；
In Fig. 1-Figure 16: 1- extension rod, 1-1-extension rod interior bar, 1-2-extension rod outer bar, 2-1-threads of lead screw bar,
2-2-nut screw boss, 2-3-feed screw nut, 2-4-nut screw card slot, 3-lead screw bearings, 4-circlips, 5-proximal ends
Spicule bracket, 5-1-proximal end spicule pedestal upper end lid, 5-2-proximal end spicule pedestal lower end lid, 5-3-proximal end spicule bracket needle
Slot, 5-4-proximal end spicule pedestal upper end lid left side threaded hole, 5-5-proximal end spicule bracket rotary body, 5-6-proximal end spicule branch
Frame embeds tooth socket, threaded hole on the right side of 5-7-proximal end spicule pedestal upper end lid, 6-1-proximal end left side spring, 6-2-proximal end right side
Spring, 7-1-proximal end spicule bracket left screw, 7-2-proximal end spicule bracket right screw, 8-proximal end spicules, 9-proximal ends
Central rotational body, 9-1-proximal end central rotational body stretch out rotation portion, and 9-2-proximal end central rotational body concave surface, 9-3-are close
Hold central rotational body projecting shaft, 10-proximal end splined shafts, 10-1-proximal end splined shaft grooving surface, 10-2-proximal end spline spiral shell
Line, 11-proximal end central rotational body gears, 12-proximal end bearing (ball) covers, 13-proximal end cap nuts, under 14-1-proximal end spline
End bearing, 14-2-proximal end spline bottom end bearing, 15-proximal end lock washers, 16-proximal end extension rod clamps, 16-1-proximal end
Extension rod clamp tooth socket, 16-2-proximal end extension rod clamp indent hole axle, 16-3-proximal end extension rod clamp concave surface, 17-
Proximal end extension rod clamp gear, 17-1-proximal end extension rod clamp gear shaft, 18-1-proximal end central rotational body upper end bearing,
18-2-proximal end central rotational body bottom end bearing, 19-proximal connecting end lids, 20-proximal end extension rod clamp gear nuts, 21-
Proximal end check washer, 22-proximal end extension rod clamp bearings, 23-proximal ends fastening long spiro nail, 24-proximal end lock washers, 25-
Proximal connecting end lid screw, 26-1-proximal end extension rod nut, 26-2-proximal end extension rod screw, 27-distal end extension rod cards
Son, 27-1-distal end extension rod clamp tooth socket, 27-2-distal end extension rod clamp indent hole axle, 28-1-distal end extension rod spiral shell
Mother, 28-2-distal end extension rod screw, 29-distal end central rotational bodies, 29-1-distal end central rotational body stretch out rotation portion,
29-3-distal end central rotational body projecting shaft, 30-distal end extension rod clamp gears, 30-1-distal end extension rod clamp gear shaft,
31-1-distal end central rotational body upper end bearing, 31-2-distal end central rotational body bottom end bearing, 32-Distal coupling end lids,
32-1-Distal coupling end lid screw, 33-distal end extension rod clamp gear nuts, 34-distal end check washers, 35-distally prolong
Long stick clamp bearing, 36-distal end fastening long spiro nails, 37-distal end lock washers, 38-distal bone needle racks, 38-1-distal end
Spicule pedestal upper end lid, 38-2-distal bone needle rack lower cover, 38-3-distal bone needle rack needle tray, 38-4-distal end spicule
Bracket rotary body, 38-5-distal bone needle rack embed tooth socket, 39-distal end central rotational body gears, 40-distal end splined shafts,
40-1-distal end splined shaft grooving surface, 40-2-distal end spline thread, 41-1-distal end spline bottom end bearing, 41-2-distal end
Spline upper end bearing, 42-distal end bearing (ball) covers, 43-distal end cap nuts, 44-distal end lock washers, 45-1-distal bone
Needle rack left screw, 45-2-distal bone needle rack right screw, 46-1-distal left spring, 46-2-Distal Right bullet
Spring, 47-distal end spicules, 48-1-proximal tibia, 48-2-distal tibia, 48-3-distal bone needle rack needle tray.
Specific embodiment
As shown in Fig. 1-Figure 16, the present invention is a kind of seven freedom shin bone unilateral external fixator, has symmetrically close
Hold three revolute pairs, three revolute pairs in distal end and a prismatic pair, the seven freedom cascaded structure form of use: main includes close
Rotor (9), proximal end extension rod clamp (16), the distal end distal end extension rod clamp (27) among end spicule bracket (5), proximal end
Central rotational body (29), distal bone needle rack (38) and extension rod (1).In carrying out shin bone reseting procedure, pass through rotation first
Proximal tibia (48-1) is fixed on by proximal end spicule bracket left screw (7-1) and right screw (7-2) by proximal end spicule (8)
In proximal end spicule bracket needle tray (5-3), it is fixedly connected with proximal tibia (48-1) with proximal end spicule bracket (5), it then will distal end
Spicule (47) is fixed in distal bone needle rack needle tray (48-3), passes through rotating distal end spicule bracket left screw (45-1) and the right side
Side screw (45-2) is fixedly connected with distal tibia (48-2) with distal bone needle rack (38), that is, completes fixator and shin bone
Connection.
After both ends spicule bracket is connect with shin bone both ends, according to the dislocation of distal tibia (48-2) and proximal tibia (48-1)
Position orientation relation complete two knochenbruch alignment: doctor determines proximal end central rotational body (9) and proximal end extension rod clamp according to X-ray
(16) rotation angle makes to turn among proximal end spicule bracket (5) opposite proximal end by spanner rotation proximal end splined shaft (10) first
Kinetoplast (9) forms the relative rotation of x-axis direction, rotates to the position of reduction of the fracture needs, and proximal end spicule bracket (5) passes through rotation
Proximal end cap nut (13) and proximal end central rotational body (9) are fixed together；Proximal end central rotational body (9) is rotated close by spanner
Extension rod clamp gear shaft (17-1) and proximal end extension rod clamp (16) is held to form the mutual rotation in y-axis direction, when rotating to one
Determine angle, locking proximal end extension rod clamp nut (20) makes proximal end extension rod clamp gear shaft (17-1) stop operating, and then
Proximal end central rotational body (9) is fixed together by fastening long spiro nail (23) and proximal end extension rod clamp (16)；Proximal end extension rod
Clamp (16) and extension rod interior bar (1-1) form the revolute pair in z-axis direction, when proximal end extension rod clamp (16) and extension rod interior bar
(1-1) mutually goes to certain angle, by tightening proximal end extension rod nut (26-1) realization proximal end extension rod clamp (16) and prolonging
The fixation of long stick interior bar (1-1) pose.
Then the interconnection for completing three revolute pairs in distal end, makes it with medicine spanner rotating distal end extension rod clamp (27)
The revolute pair that z-axis direction is formed with extension rod outer bar (1-2), when distal end extension rod clamp (27) and extension rod outer bar (1-2) shape
When angled, distal end extension rod clamp (27) and extension rod outer bar are realized by tightening distal end extension rod nut (28-1)
(1-2) pose is fixed to each other；Distal end central rotational body (29) passes through spanner rotating distal end central rotational body gear shaft (30-1)
The mutual rotation that y-axis direction is formed with distal end extension rod clamp (27) locks distal end extension rod clamp when rotating to certain angle
Nut (33) makes distal end extension rod clamp gear shaft (17-1) stop operating, and then distal end central rotational body (29) is tight by distal end
Gu long spiro nail (36) and distal end extension rod clamp (27) are fixed together；And then rotating distal end splined shaft (40) makes distal end spicule
Bracket (38) forms the relative rotation of x-axis direction relative to distal end central rotational body (29), when rotating to certain angle, distal bone
Needle rack (38) is fixed together by rotating distal end end cover nut (43) and distal end central rotational body (29)；So far it realizes close
Hold bone photo for the alignment procedure of distal bone.
By adjusting screw nut (2-3), proximal tibia (48-1) can control relative to distal tibia (48-2) in z-axis
The axial pressure function and Limb lengthening function in reduction of the fracture later period are realized in position on direction.
It can be seen from the above, the appearance of proximal tibia opposite proximal end shin bone may be implemented in six revolute pairs of this unilateral external fixator
Axial pressure function and bone lengthening function at shin bone later period knochenbruch may be implemented in state alignment, the prismatic pair in a direction,
Therefore unilateral external fixator can effectively realize shin bone reset and fracture middle and later periods flexible fastening function.
Claims (1)
1. a kind of series connection seven freedom unilateral external fixator, it is characterised in that: including turning among proximal end spicule bracket (5), proximal end
Kinetoplast (9), proximal end extension rod clamp (16), distal end extension rod clamp (27), distal end central rotational body (29), distal bone needle rack
(38) and extension rod (1)；
The extension rod (1) is convex by extension rod outer bar (1-2), extension rod interior bar (1-1), threads of lead screw bar (2-1), nut screw
Platform (2-2), feed screw nut (2-3), nut screw card slot (2-4), lead screw bearing (3) and circlip (4) composition: hollow extension rod
Interior bar (1-1) is connected by screw thread and threads of lead screw bar (2-1), and nut screw boss (2-2) is located at threads of lead screw bar (2-1)
Lower end, lead screw bearing (3) are mounted on nut screw boss (2-2), and circlip (4) is mounted on lead screw bearing (3) and feed screw nut
Between (2-3), extension rod outer bar (1-2) is connected by lead screw bearing (3) and nut screw boss (2-2), and lead screw bearing (3) is logical
Circlip (4) is crossed to be fixedly connected with feed screw nut (2-3)；
The proximal end spicule bracket (5) is by proximal end spicule pedestal upper end lid (5-1) and proximal end spicule pedestal lower end lid (5-2) group
At proximal end spicule pedestal upper end lid (5-1) passes through proximal end spicule bracket left screw (7-1) and proximal end spicule bracket right screw
(7-2) is connect with proximal end spicule pedestal lower end lid (5-2)；Spring (6-1) is mounted on proximal end spicule pedestal upper end lid on the left of proximal end
In left side threaded hole (5-4), spring (6-2) is mounted on the right side of the spicule pedestal upper end lid of proximal end in threaded hole (5-7) on the right side of proximal end,
Proximal end spicule bracket left screw (7-1) and proximal end spicule bracket right screw (7-2) are by spring (6-1) on the left of proximal end and closely
Proximal end spicule (8) is pressed in proximal end spicule bracket needle tray (5-3) by end right side spring (6-2), realizes consolidating for proximal end spicule (8)
It is fixed；
The right end of the proximal end spicule pedestal lower end lid (5-2) is proximal end spicule bracket rotary body (5-5), the rotation of proximal end spicule bracket
It is provided with embedded tooth socket (5-6) in swivel (5-5), the left side of proximal end central rotational body (9), which exists, stretches out rotation portion (9-1)；Closely
Spicule bracket rotary body (5-5) insertion proximal end central rotational body is held to stretch out between rotation portion (9-1) and by turning among proximal end
Kinetoplast gear (11) links together, proximal end spicule bracket rotary body (5-5) by proximal end spicule bracket embed tooth socket (5-6) and
Proximal end central rotational body gear (11) connection, proximal end splined shaft (10) link together with proximal end central rotational body gear (11)；
The axial end of proximal end splined shaft (10) is provided with proximal end splined shaft grooving surface (10-1) and proximal end spline thread (10-2), closely
It holds central rotational body (9) to realize by rotation proximal end splined shaft grooving surface (10-1) and proximal end spicule bracket (5) to relatively rotate,
Constitute revolute pair；
The bottom end that proximal end central rotational body stretches out rotation portion (9-1) has concave surface (9-2), proximal end spline bottom end bearing (14-1)
It is mounted in proximal end central rotational body concave surface (9-2), wherein proximal end splined shaft (10) passes through proximal end spline bottom end bearing (14-
1) and central rotational body in proximal end stretches out rotation portion (9-1) connection, and proximal end splined shaft (10) passes through proximal end spline upper end bearing
The connection of (14-2) and proximal end bearing (ball) cover (12), proximal end cap nut (13) are pressed on proximal shaft by proximal end lock washer (15)
On socket end lid (12), proximal end cap nut (13) is connected by proximal end spline thread (10-2) and proximal end splined shaft (10), proximal end
Splined shaft (10) is pressed in proximal end central rotational body concave surface (9-2) by proximal end cap nut (13)；
There is a projecting shaft (9-3) in the lower end of the proximal end central rotational body (9), and proximal end central rotational body projecting shaft (9-3) is other
A proximal end extension rod clamp gear (17) is installed on side, and the proximal end central rotational body (9) passes through proximal end extension rod clamp gear
(17) and proximal end extension rod clamp (16) connection, proximal end extension rod clamp gear (17) pass through proximal end extension rod clamp tooth socket (16-
1) it is connected with proximal end extension rod clamp (16)；Proximal end central rotational body (9) passes through rotation proximal end extension rod clamp gear shaft (17-
1) and proximal end extension rod clamp (16) forms the mutual rotation around proximal end central rotational body projecting shaft (9-3), constitutes revolute pair；Closely
Proximal end central rotational body upper end bearing (18-1) and proximal end central rotational body are mounted on end extension rod clamp gear shaft (17-1)
Bottom end bearing (18-2), bearings at both ends are separately mounted to the upper and lower surface of proximal connecting end lid (19), proximal end central rotational body (9)
It is connected by proximal end central rotational body upper end bearing (18-1) with the upper surface of proximal connecting end lid (19), proximal connecting end lid
(19) it is connected by proximal end central rotational body bottom end bearing (18-2) with the lower surface of proximal connecting end lid (19)；Proximal end extension rod
Clamp gear nut (20) is pressed on proximal end central rotational body (9) by proximal end check washer (21)；
Proximal end extension rod clamp bearing (22) is mounted on lower end and the proximal end extension rod of proximal end central rotational body projecting shaft (9-3)
On clamp concave surface (16-3), proximal end central rotational body projecting shaft (9-3) is by proximal end extension rod clamp bearing (22) and closely
Extension rod clamp indent hole axle (16-2) connection is held, proximal end extension rod clamp bearing (22) is pressed on by proximal connecting end lid (19)
On proximal end extension rod clamp concave surface (16-3), proximal end central rotational body projecting shaft (9-3) passes through proximal end extension rod clamp axis
It holds (22) and proximal end extension rod clamp indent hole axle (16-2) forms relative rotation motion of driving system；Proximal connecting end lid (19) passes through proximal end
Fastening long spiro nail (23) is fixed on proximal end extension rod clamp (16)；Proximal end central rotational body (9) fastens long spiro nail by proximal end
(23) it is fixed together with proximal end extension rod clamp (16), it is fixed by proximal end lock washer (24) that proximal end fastens long spiro nail (23)
On proximal end central rotational body (9)；
The proximal connecting end lid (19) is fixed on one by proximal connecting end lid screw (25) and proximal end central rotational body (9)
It rises；
The proximal end extension rod clamp (16) is mounted on extension rod interior bar (1-1), and distal end extension rod clamp (27), which is mounted on, to be prolonged
On long stick outer bar (1-2)；Proximal end extension rod clamp (16) passes through proximal end extension rod screw (26-2) and proximal end extension rod nut
(26-1) is fixed together with extension rod interior bar (1-1), and extension rod interior bar (1-1) and proximal end extension rod clamp (16) realize 360
Degree mutually rotation, constitutes revolute pair；Distal end extension rod clamp (27) passes through distal end extension rod screw (28-2) and distal end extension rod
Nut (28-1) is fixed together with extension rod outer bar (1-2), and extension rod outer bar (1-2) and distal end extension rod clamp (27) are realized
360 degree of mutually rotations, constitute revolute pair；
The structure of fixator is symmetrical structure, the connection of the distal end extension rod clamp (27) and distal end central rotational body (29) with
As proximal end extension rod clamp (16) with the connection of proximal end central rotational body (9) is；
The distal end central rotational body (29) is connected by distal end extension rod clamp gear (30) and distal end extension rod clamp (27),
Distal end extension rod clamp gear (30) is connected by distal end extension rod clamp tooth socket (27-1) and distal end extension rod clamp (27)；Far
Hold central rotational body (29) by rotating distal end extension rod clamp gear shaft (30-1) and distal end extension rod clamp (27) formation around
The mutual rotation of distal end central rotational body projecting shaft (29-3) constitutes revolute pair；Distal end central rotational body (29) passes through in distal end
Between rotor upper end bearing (31-1) connected with the upper surface of Distal coupling end lid (32), Distal coupling end lid (32) pass through distal end
Central rotational body bottom end bearing (31-2) is connected with the lower surface of Distal coupling end lid (32)；Distal end extension rod clamp gear nut
(33) it is pressed on distal end central rotational body (29) by distal end check washer (34)；Distal end central rotational body projecting shaft (29-3)
It is connected by distal end extension rod clamp bearing (35) and distal end extension rod clamp indent hole axle (27-2), Distal coupling end lid (32)
It is pressed on distal end extension rod clamp bearing (35), distal end central rotational body projecting shaft (29-3) passes through Distal coupling end lid (32)
Relative rotation motion of driving system is formed with distal end extension rod clamp indent hole axle (27-2)；Distal coupling end lid (32) passes through distal end fastening length
Screw (36) is fixed on distal end extension rod clamp (27)；Distal end central rotational body (29) by distal end fasten long spiro nail (36) and
Distal end extension rod clamp (27) is fixed together；Distal coupling end lid (32) passes through Distal coupling end lid screw (32-1) and distal end
Central rotational body (29) is fixed together；
The connection of the distal end central rotational body (29) and distal bone needle rack (38) and proximal end central rotational body (9) and proximal end bone
The connection of needle rack (5) is the same；
Distal bone needle rack rotary body (38-4) the insertion distal end central rotational body stretches out between rotation portion (29-1) and leads to
It crosses distal end central rotational body gear (39) to link together, distal bone needle rack rotary body (38-4) passes through in distal bone needle rack
Inserted tooth slot (38-5) and distal end central rotational body gear (39) connection, distal end splined shaft (40) and distal end central rotational body gear
(39) it links together；The axial end of distal end splined shaft (40) is provided with distal end splined shaft grooving surface (40-1) and distal end spline spiral shell
Line (40-2), distal end central rotational body (29) pass through rotating distal end splined shaft grooving surface (40-1) and distal bone needle rack (38)
It realizes and relatively rotates, constitute revolute pair；Distal end splined shaft (40) turns by the way that distal end spline bottom end bearing (41-1) and distal end are intermediate
Kinetoplast stretches out rotation portion (29-1) connection, and distal end splined shaft (40) passes through distal end spline upper end bearing (41-2) and distal end bearing
End cap (42) connection, distal end cap nut (43) are pressed on distal end bearing (ball) cover (42) by distal end lock washer (44), far
End cover nut (43) are held to connect by distal end spline thread (40-2) and distal end splined shaft (40), distal end splined shaft (40) passes through remote
It holds end cover nut (43) to compress distal end central rotational body to stretch out on rotation portion (29-1)；Distal bone needle rack upper end cover (38-1)
Pass through distal bone needle rack left screw (45-1) and distal bone needle rack right screw (45-2) and distal bone needle rack lower end
Cover (38-2) connection；Distal bone needle rack left screw (45-1) and distal bone needle rack right screw (45-2) are left by distal end
Distal end spicule (47) is pressed in distal bone needle rack needle tray (38-3) by lateral spring (46-1) and Distal Right spring (46-2),
Realize the fixation of distal end spicule (47).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610951473.9A CN106618698B (en) | 2016-10-27 | 2016-10-27 | A kind of seven freedom shin bone unilateral external fixator |
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|---|---|---|---|
| CN201610951473.9A CN106618698B (en) | 2016-10-27 | 2016-10-27 | A kind of seven freedom shin bone unilateral external fixator |
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| CN106618698B true CN106618698B (en) | 2019-02-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108577950B (en) * | 2018-05-04 | 2021-02-02 | 北京工业大学 | Dynamic adjustable single-side external fixator |
| CN108969082A (en) * | 2018-06-27 | 2018-12-11 | 衡水增力医疗器械有限公司深州分公司 | A kind of auxiliary reset device of child femoral shaft fracture closed reduction |
| CN109276301B (en) * | 2018-08-09 | 2020-12-18 | 盐城日升月恒智能科技有限公司 | Intramedullary and extramedullary combined electric bone lengthening device |
| CN109276299B (en) * | 2018-08-09 | 2020-12-18 | 盐城日升月恒智能科技有限公司 | Belt pulley bone extension fixture |
| CN109350206B (en) * | 2018-11-07 | 2019-11-08 | 吉林大学 | A kind of Medical hand fracture correction external fixator |
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|---|---|---|---|---|
| CN2045994U (en) * | 1988-11-19 | 1989-10-18 | 金伟 | External fastening apparatus of single-sided ball type joint |
| CN202179587U (en) * | 2011-07-22 | 2012-04-04 | 天津市新中医疗器械有限公司 | Multifunctional external fixator with lengthening and pressurizing functions |
| CN103417280A (en) * | 2013-09-06 | 2013-12-04 | 江苏广济医疗科技有限公司 | Tubular traction pressurization connecting rod control device and outer-bone fixing device |
| CN103829994A (en) * | 2014-03-24 | 2014-06-04 | 阮冬睿 | Shank shin bone outer fixing support for orthopedics department |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SI24067A (en) * | 2012-05-23 | 2013-11-29 | dr. Vane AntoliÄŤ | Improved modular side device with an intramedular pin for guiding a bone during its lengthening |
| US9301783B2 (en) * | 2013-01-23 | 2016-04-05 | Fixx Orthopedics, LLC | Orthopedic external fixation device |
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2016
- 2016-10-27 CN CN201610951473.9A patent/CN106618698B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2045994U (en) * | 1988-11-19 | 1989-10-18 | 金伟 | External fastening apparatus of single-sided ball type joint |
| CN202179587U (en) * | 2011-07-22 | 2012-04-04 | 天津市新中医疗器械有限公司 | Multifunctional external fixator with lengthening and pressurizing functions |
| CN103417280A (en) * | 2013-09-06 | 2013-12-04 | 江苏广济医疗科技有限公司 | Tubular traction pressurization connecting rod control device and outer-bone fixing device |
| CN103829994A (en) * | 2014-03-24 | 2014-06-04 | 阮冬睿 | Shank shin bone outer fixing support for orthopedics department |
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