CN202020577U - Three-dimensional external fixed support for reduction of fracture - Google Patents
Three-dimensional external fixed support for reduction of fracture Download PDFInfo
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- CN202020577U CN202020577U CN2011200807436U CN201120080743U CN202020577U CN 202020577 U CN202020577 U CN 202020577U CN 2011200807436 U CN2011200807436 U CN 2011200807436U CN 201120080743 U CN201120080743 U CN 201120080743U CN 202020577 U CN202020577 U CN 202020577U
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Abstract
The utility model relates to a three-dimensional external fixed support for reduction of fracture, comprising an upper circular ring, a lower circular ring, a plurality of push-and-pull rods and a universal joint for connecting two end parts of each push-and-pull rod and a connecting part of the upper and the lower circular rings, wherein the universal joint is a two-degree-of-freedom flexible universal joint of a flexible spring hinged type. The three-dimensional external fixed support for reduction of fracture, provided by the utility model, has the advantages of simple structure, no abrasion and good reliability, and the requirement for the precision of reduction of fracture and malformation correction treatment can be met.
Description
Technical field
This utility model relates to a kind of surgical medical equipment, the three-dimensional exterior fixation bracket of particularly a kind of novel reduction of the fracture.
Background technology
When making up reduction of the fracture robot with parallel-connection structure, the application of the three-dimensional exterior fixation bracket of having extended, three-dimensional exterior fixation bracket is usually by annulus up and down and connect six of annulus up and down and connect push-pull bars and constitute.Because annulus needs to do the relative displacement rotation with six-freedom degree as requested up and down, six connect push-pull bar and need be connected by the twelve earthly branches universal joint between annulus up and down.Prior art adopts rigid universal joint to connect usually, as public announcement of a patent application CN101847182A, denomination of invention is disclosed reduction of the fracture robot architecture in the patent application of and real resetting registration method virtual based on the long bone of six-degree-of-freedom parallel connection mechanism, this structure adopts six controlled electronic push-pull bars, and uses traditional rigid universal joint to connect controlled electronic push-pull bar and annulus up and down.Carrying out Osteological when resetting, if there is staggered situation at the fracture two ends, rigid universal joint makes easily increases patient's misery delay union of fracture by the excessive secondary damage that causes of fracture stress, even may cause universal joint or electronic push-pull bar to damage, the influence operation is carried out smoothly.And present external fixing rack for fracture setting needs to lubricate owing to there is wearing terrain such as rigid universal joint in use, and reliability and life-span are low, complex manufacturing process, production cost height.
The utility model content
This utility model is made complicated, easy to wear at existing external fixing rack for fracture setting, provide a kind of novel reduction of the fracture three-dimensional exterior fixation bracket, have simple in structure, not wearing and tearing, the advantage of good reliability, the while can be satisfied the needs of the precision of the reduction of the fracture and lopsided correction treatment.
The technical solution of the utility model is as follows:
The three-dimensional exterior fixation bracket of a kind of reduction of the fracture, comprise annulus, down annulus, a plurality of push-pull bar and universal joint that the both ends of each push-pull bar are linked to each other with the connecting portion of annulus up and down respectively, it is characterized in that described universal joint is the rubber universal joint of the spring hinge chain type of two degrees of freedom flexibility.
Described rubber universal joint comprises spring, first screw rod and second screw rod, and described spring is an extension spring, comprises left section, interlude and the right section of continuous distribution successively, and is thin, left section of interlude and the thick hourglass shape of right section; The first screw flight end is connected with the left side section spiral of described extension spring, and the second screw flight end is connected with the right section spiral of described extension spring; The other end of described first screw rod is fixedly set in the end of push-pull bar, and the other end of second screw rod is fixedly set in the connecting portion of annulus or the connecting portion of following annulus.
Described push-pull bar is manual push-pull bar or electronic push-pull bar, and described manual push-pull bar is screw thread fine adjustment type push-pull bar or slidingtype push-pull bar.
The left side section of described spring and right section are that the center is and is symmetrical arranged with the interlude, and described first screw rod is all identical with second screw flight and pitch.
The internal diameter of described spring left side section or right section is slightly less than the first screw flight internal diameter, and the line footpath of described spring left side section or right section is smaller or equal to the pitch of first screw rod.
The described first screw flight internal diameter is 6mm, and the internal diameter of spring left side section is 5.5mm, and the pitch of described first screw rod is 1.5mm, and the line of spring left side section directly is 1.4mm.
The moment slewing area of described spring is-45 °～45 °.
Technique effect of the present utility model is as follows:
The three-dimensional exterior fixation bracket of the reduction of the fracture that this utility model provides, the rubber universal joint of the spring hinge chain type of two degrees of freedom flexibility has been replaced traditional rigid universal joint, because the spring manufacturing process is simple, so manufacturing process and the production cost of the reduction of the fracture robot of having simplified the three-dimensional exterior fixation bracket of the reduction of the fracture or having made up with parallel-connection structure, and when fracture in reseting procedure because extruding when making push-pull bar produce stress, the buoyancy effect of the spring of the spring hinge of two-dimension flexible can play cushioning effect to the stress of push-pull bar, and further eliminate this stress, thereby satisfy the needs of the precision of the reduction of the fracture and lopsided correction treatment.The three-dimensional exterior fixation bracket of the reduction of the fracture of the present utility model has simple in structure, and wearing and tearing not need not to lubricate good reliability, the advantage of long service life.
The three-dimensional exterior fixation bracket of this reduction of the fracture connects the universal joint function of the flexibility of two screw rods (first screw rod and second screw rod) by the extension spring realization of the thick hourglass type in middle thin both sides, except the function that realizes the varied angle transmission of power, can also connect the rubber universal joint adapter that electronic push-pull bar and annulus are up and down used as a kind of.Character according to spring, thin part can reach that to flexibly connect be the function of universal joint in the middle of it, spring with special shape has replaced traditional rigid universal joint, in the scope of stress design, this rubber universal joint does not have the wearing terrain of rigid universal joint, the three-dimensional exterior fixation bracket of the reduction of the fracture therefore of the present utility model has been avoided wearing and tearing, has improved its service life, has reduced volume and weight.The rubber universal joint of the spring hinge chain type of two degrees of freedom flexibility is when rotating vertically, the constrictive force that spring produces can stop first screw rod (or second screw rod) thereby screw out from spring and prevents between the two loosening automatically and come off, and do not have gap and friction, solved wearing and tearing that each parts in the existing external fixing rack for fracture setting take place in use, the loosening and problem that comes off.In when assembling, also can be simply with the two ends of spring respectively along two screw flight precession screw rods, thereby assemble the three-dimensional exterior fixation bracket of this reduction of the fracture of the present utility model easily.
Description of drawings
Fig. 1 is the preferred structure sketch map of the three-dimensional exterior fixation bracket of this utility model reduction of the fracture.
Fig. 2 is the structure for amplifying sketch map of the local A part of Fig. 1.
Fig. 3 is the preferred structure sketch map of rubber universal joint of the present utility model.
Fig. 4 is the spring structure sketch map in the rubber universal joint shown in Figure 3.
Fig. 5 is first screw rod in the rubber universal joint shown in Figure 3 and the structural representation of second screw rod.
Each label lists as follows among the figure:
The 1-rubber universal joint; The last annulus of 2-; The electronic push-pull bar of 3-; The 4-spring; 5-first screw rod; 6-second screw rod; Warp in the R-spring; R-spring wire footpath; The D-bottom diameter; The L-screw pitch.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is described.
Fig. 1 is the preferred structure sketch map of the three-dimensional exterior fixation bracket of the reduction of the fracture of the present utility model, and Fig. 2 is the structure for amplifying sketch map of its local A part.The three-dimensional exterior fixation bracket of this reduction of the fracture, comprise that one is gone up annulus 2, a following annulus, six electronic push-pull bars 3 and 12 rubber universal joints 1, rubber universal joint 1 links to each other the both ends of each electronic push-pull bar 3 respectively with the connecting portion of annulus up and down, this rubber universal joint 1 is the rubber universal joint of the spring hinge chain type of two-dimension flexible, the preferred structure sketch map of rubber universal joint as shown in Figure 3, comprise spring 4, first screw rod 5 and second screw rod 6, wherein, the structural representation of spring 4 as shown in Figure 4, the structural representation of first screw rod 5 and second screw rod 6 is as shown in Figure 5.Spring 4 is an extension spring, comprise left side section, interlude and the right section of continuous distribution successively, and be thin, left section of interlude and the thick hourglass shape of right section, be that spring 4 is the thick hourglass shape extension spring in middle thin both sides, the left side section of described spring 4 and right section are that the center is and is symmetrical arranged with the interlude, be spring 4 with thin position, centre be that the center is both sides and is symmetrical arranged, the internal diameter at the position (left side section or right section) that the spring both sides are thick is R, the line footpath of left side section, interlude and the right section of spring is identical, and spring wire directly is r; The end of thread of first screw rod 5 is connected with the left side section spiral of spring 4, and the end of thread of second screw rod 6 is connected with the right section spiral of spring, and the screw thread and the pitch of first screw rod 5 and second screw rod 6 are all identical, and as shown in Figure 5, bottom diameter is D, and pitch is L.For example, first screw rod 5 is entered from the inside of the left side section of spring 4 is left-handed, second screw rod 6 is entered from the inside dextrorotation of the right section of spring, the internal diameter R at thick position, spring 4 both sides (left side section or right section) is complementary with the bottom diameter D of first screw rod 5 and second screw rod 6 respectively, first screw rod 5 is the integrative-structure setting with electronic push-pull bar 3, second screw rod 6 is the integrative-structure setting with last annulus 2 or following annulus, an end that is electronic push-pull bar 3 connects upward annulus 2 by rubber universal joint 1, and the other end of electronic push-pull bar 3 connects annulus down by the another one rubber universal joint.For making the closely coiling of winning between screw rod 5 and second screw rod 6 and the spring 4, no gap and friction, the internal diameter R that is set to thick position, spring 4 both sides (left side section or right section) is slightly less than the bottom diameter D of first screw rod 5 (or second screw rod 6), i.e. R≤D; And the line of spring footpath r should choose according to the pressure that this rubber universal joint bore, and after the line footpath of spring 4 r determined, the pitch of each screw rod can be determined, the pitch L of the line footpath r of spring 4 smaller or equal to first screw rod 5 (or second screw rod 6) is set, i.e. r≤L.Preferably, being provided with in the screw thread of first screw rod 5 in the rubber universal joint 1 and second screw rod 6 through D is 6mm, the internal diameter R at the position that spring 4 both sides are thick is 5.5mm, the pitch of first screw rod 5 and second screw rod 6 is 1.5mm, the line of spring directly is 1.4mm, and the moment slewing area of spring 4 is-45 °～45 °.
This utility model is by the three-dimensional exterior fixation bracket of the reduction of the fracture of rubber universal joint assembling, replace traditional rigid universal joint by rubber universal joint, precession first screw rod 5 and second screw rod 6 reach and flexibly connect the effect that electronic push-pull bar is connected with the universal joint of annulus up and down respectively thereby this moment is by spring 4 both sides of special shape.The three-dimensional exterior fixation bracket of the reduction of the fracture of the present utility model also can be used as a kind of reduction of the fracture parallel robot and uses.
Should be pointed out that the above specific embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore; although this description has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can make amendment or be equal to replacement the invention; in a word, all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (7)
1. the three-dimensional exterior fixation bracket of the reduction of the fracture, comprise annulus, down annulus, a plurality of push-pull bar and universal joint that the both ends of each push-pull bar are linked to each other with the connecting portion of annulus up and down respectively, it is characterized in that described universal joint is the rubber universal joint of the spring hinge chain type of two degrees of freedom flexibility.
2. the three-dimensional exterior fixation bracket of the reduction of the fracture according to claim 1, it is characterized in that, described rubber universal joint comprises spring, first screw rod and second screw rod, described spring is an extension spring, comprise left section, interlude and the right section of continuous distribution successively, and be thin, left section of interlude and the thick hourglass shape of right section; The first screw flight end is connected with the left side section spiral of described extension spring, and the second screw flight end is connected with the right section spiral of described extension spring; The other end of described first screw rod is fixedly set in the end of push-pull bar, and the other end of second screw rod is fixedly set in the connecting portion of annulus or the connecting portion of following annulus.
3. the three-dimensional exterior fixation bracket of the reduction of the fracture according to claim 2 is characterized in that described push-pull bar is manual push-pull bar or electronic push-pull bar, and described manual push-pull bar is screw thread fine adjustment type push-pull bar or slidingtype push-pull bar.
4. according to claim 2 or the three-dimensional exterior fixation bracket of the 3 described reduction of the fracture, it is characterized in that the left side section of described spring and right section are that the center is and is symmetrical arranged with the interlude, described first screw rod is all identical with second screw flight and pitch.
5. the three-dimensional exterior fixation bracket of the reduction of the fracture according to claim 4 is characterized in that, the internal diameter of described spring left side section or right section is slightly less than the first screw flight internal diameter, and the line footpath of described spring left side section or right section is smaller or equal to the pitch of first screw rod.
6. the three-dimensional exterior fixation bracket of the reduction of the fracture according to claim 5 is characterized in that the described first screw flight internal diameter is 6mm, and the internal diameter of spring left side section is 5.5mm, and the pitch of described first screw rod is 1.5mm, and the line of spring left side section directly is 1.4mm.
7. according to claim 2 or the three-dimensional exterior fixation bracket of the 3 described reduction of the fracture, it is characterized in that the moment slewing area of described spring is-45 °～45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200807436U CN202020577U (en) | 2011-03-24 | 2011-03-24 | Three-dimensional external fixed support for reduction of fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200807436U CN202020577U (en) | 2011-03-24 | 2011-03-24 | Three-dimensional external fixed support for reduction of fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202020577U true CN202020577U (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200807436U Expired - Lifetime CN202020577U (en) | 2011-03-24 | 2011-03-24 | Three-dimensional external fixed support for reduction of fracture |
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| CN (1) | CN202020577U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104983497A (en) * | 2015-07-10 | 2015-10-21 | 哈尔滨天愈康复医疗机器人有限公司 | Stewart type spinal side bending rehabilitation medical robot |
| CN105030476A (en) * | 2015-07-10 | 2015-11-11 | 哈尔滨天愈康复医疗机器人有限公司 | Robot used for spondylodynia rehabilitation treatment |
| CN106361441A (en) * | 2016-09-19 | 2017-02-01 | 北京瑞盈健康科技有限公司 | Master-slave mode parallel robot system and method for femoral shaft fracture reduction |
-
2011
- 2011-03-24 CN CN2011200807436U patent/CN202020577U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104983497A (en) * | 2015-07-10 | 2015-10-21 | 哈尔滨天愈康复医疗机器人有限公司 | Stewart type spinal side bending rehabilitation medical robot |
| CN105030476A (en) * | 2015-07-10 | 2015-11-11 | 哈尔滨天愈康复医疗机器人有限公司 | Robot used for spondylodynia rehabilitation treatment |
| CN106361441A (en) * | 2016-09-19 | 2017-02-01 | 北京瑞盈健康科技有限公司 | Master-slave mode parallel robot system and method for femoral shaft fracture reduction |
| CN106361441B (en) * | 2016-09-19 | 2024-05-17 | 极限人工智能有限公司 | Master-slave type femoral shaft fracture reduction parallel robot system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111102 |