CN1012416B - Device for positioning and securing a part having circular regions - Google Patents

Abstract

A device comprises two jaws arranged to be pressed one against the other and to grasp a part to be positioned and secured. The part and/or the jaws comprise circular regions presenting a succession of planar or curved facets regularly disposed over said regions, with adjacent facets forming obtuse angles between them whose vertices define sharp edges or points. In a preferred embodiment, the jaws clamping a part having a rounded portion are tightened by means of two screws whose centerlines form an angle with each other, so that upon tightening of the jaws, at least one of the jaws flexes so as to assure a better grip of the rounded portion of the part.

Description

Device for positioning and securing a part having circular regions

The present invention relates to a kind of permission by the fixture of rest object orientation, it is specially adapted to the external bone orthopedic occasion that fixes.

For the reduction of the fracture, in fact long ago just work out technology at bone internal fixation pin, for the fracture portions fix in position, pin or squeeze near bone in, perhaps be fastened on the external fixation device that comprises framework.

Such as Swiss Patent No.630, the 798 described the sort of framework appliances that include domed support are well-known.

The cross sectional shape of this arched member is through analyzing, and draws the described preferable shape as Swiss Patent application No.309/85, this shape make pin and frame bars or other connect parts be equipped with may with various and widely mode realize.

The element of forming this external fixation device must be designed to two targets.At first, they must be simple as far as possible, makes at operation process Chinese and foreign department doctor's processing ease, allows orientation range widely simultaneously again; Secondly, they must provide an abundant rigidity and fixing reliably, and it is injury-free to make that the reduction of the fracture was in convalescent period.

Existing location and fixture comprise the clamping plate that clamp a certain position, and these clamping plate are made more or less coarse with the contact surface at the position that will clamp, and for example, the method for available sandblast obtains.In general, these devices are gratifying, still along with the increase of service time, and coarse surface meeting ground smooth, roughness will reduce.Along with contact surface polishes, the effect of firmly grasping is also more and more lower.

Also the fixture be made up of the trough of belt plane was proposed by the people.A common plastic cylinder or the spheroid of clamping in such plane.On the other hand, also can be used in the part that will clamp be on the cyclic parts to groove.For example, the described device of PCT world patent application No.83/02554.This device has good effect, still, the plastic components deformation block, therefore, its service life is shorter.

The objective of the invention is to eliminate above-mentioned shortcoming and a kind of effective device for positioning and securing that has than the long life is provided.

According to the said device for positioning and securing of the present invention, it is made up of two clamping plates, and they are installed into one and are pressed in another and remove clamping article above piece.This device is characterised in that said parts and/or clamping plate include annular position, on it one then one arranging facet or little cambered surface regularly, draw into the obtuse angle between the adjacent facet, their top, angle becomes sharp rib or summit.

Said parts also comprise the centre bore that is used for laying a bar or pin.These parts can be the axis dimidiations along centre bore, also can be one and have the global facility that stretches out a pipe from the one or both sides of spheroid.

In addition, the parts that clamp can be made at least a portion or a position has the shape of the cylinder or the truncated cone of facet.Clamped cylinder also can comprise one with the perpendicular centre bore of axis that will be installed in pin or bar, and is divided into two halves along the axis of this centre bore.

Successive facet uses the material harder than the clamping plate that clamp the facet position to constitute.These materials can be respectively tempered steel and tempered steel not, or steel and a kind of light metal, or the light-alloy of different hardness, perhaps alloy and plastics.

According to most preferred embodiment, it is fastening with two screws clamping the clamping plate with ring part object, and the centrage of these two screws so that pass through binding clip, makes a plate bending at least, thereby guarantees to clamp better the annulus of parts each other at an angle.

Below in conjunction with accompanying drawing, several embodiments and improvement according to the device of said location of the present invention and mounting article are described by example.

In the accompanying drawing:

Fig. 1 is the perspective view of a location and fixture, and this device is planned to be installed on the round arch form carriage (representing with dotted line) and clamping and one and comprise the guiding sleeve (representing with dotted line equally) of drawing tubular portion from the astrosphere body.

Fig. 2 is the dissection perspective view of device shown in Figure 1.

Fig. 3 is the side view that installs shown in the above-mentioned figure, in addition, also is used for representing a sleeve pipe that stretches out tubular portion in spheroid both sides, center.

Fig. 4 is the cutaway view along Fig. 3 IV-IV direction.

Fig. 5 is the telescopic side view of a kind of sphere.

Fig. 6 A and Fig. 6 B are the profiles of the telescopic different embodiments among Fig. 5.

Fig. 7 is a kind of improved telescopic side view.

Fig. 8 is the enlarged drawing of core shown in Figure 3, shows the facet of regular arrangement on the spheroid part surface.

Fig. 9 is the partial enlarged drawing of the sleeve surface shown in Fig. 8, and it has drawn and has had the faceted details of faceted first embodiment.

Figure 10 is the cutaway view along Fig. 9 X-X line, a part of wherein also having drawn clamping plate.

Figure 11 is the cutaway view along Fig. 9 XI-XI line, includes the part of clamping plate equally.

Figure 12 is similar to Figure 10, but shown be second embodiment with concavity facet.

Figure 13 is the perspective view that expression requires to install the device for positioning and securing that runs through pin.

Figure 14 is the side view of device shown in Figure 13, represents to locate and a fastening coupling bar with the top of clamping plate with broken section.

Figure 15 is the side view of the modifying device of parts shown in Figure 14.

Device for positioning and securing as shown in Figures 1 to 4, it mainly contains two process train wheel bridges 30 and lower plate 40 is formed with the bolt 10 and 20 that fixture block 50 matches then.Whole device makes and might position and fix sleeve pipe 60, and installs and clamp arched member 70 simultaneously.

At first, should be noted that set bolt 10 is not parallel with 20 centrage 11 and 21, but form an about angle of 10 ° that reason illustrates later on.

Bolt 10 and 20 has a big head 12 and 22, like this when system is in place, before firm with proper implements tightening, is convenient to their placement and manually tightens.12 and 22 of the above-mentioned bolt side of having, but obviously, the bolt head shape of any other form also can be suitable for, and this does not depart from the scope of the present invention.

In addition, bolt 10 and 20 comprises pad 13 and 23 separately, and they respectively have a plane 14 and 24, leans against above the corresponding bolts 12,22, and the another side at pad has land portions 15 and 25 equally, and it acts on the back and introduces.Be noted that pad 13 and 23 is sticked on bolt 10 and 20 once, then in the groove 16 and 26 that is screwed into bolt 10,20 on their pedestal.Therefore, pad 13 and 23 and bolt 10 and 20 forms that an integral body is assembled or operation such as sterilization.In Fig. 2, pad 13 nestles up bolt head 12 and draws, and to expose groove 16, pad 23 is in the lower position of groove 26 substantially.

Bolt 10 and 20 also comprises threaded portion 17 and 27 respectively, is used for matching with corresponding banded hole, and this will see below.

Bolt 10 and 20 and their pad 13 and 23 typically make by rustless steel so that part is durable and be suitable for sterilization.

Train wheel bridge 30 has two through holes 31 and 32 on the position of the mounting center line 11 of bolt 10 and 20 and 21, the top of through hole is processed to counter sink 33 and 34 and matches with the sphere 15 and 25 of pad 13 and 23. Shrinkage pool 33 and 34 can be a sphere, also can be taper.For fear of any destruction of generation, the spherical part 15 of pad and 25 surface, and high polish is all answered on the surface of shrinkage pool 33 and 34.

See that as Fig. 4 the centre of the bottom surface of train wheel bridge 30 between through hole 31 and 32 also has a pod 35.This pod 35 is furnished with a central recess 36, and its purposes illustrates afterwards.

Fixture 30 also is furnished with horizontal auxiliary region 37 and 38 in the both sides of pod 35, with tubulose external part 61 and the 62 oblique angles orientation that allows sleeve pipe 60 as shown in Figure 3.

Lower plate 40 is towards above-mentioned train wheel bridge 30, it has two through holes 41 and 42 equally on the centrage 11 and 12 of bolt 10 and 20, pod 43 that has a central recess 44 and two horizontal auxiliary regions 45 and 46, all these features can be seen in the side view of the perspective view of Fig. 2 and Fig. 3.

Also have a supporting extension 47 and a notch 48 that presents with inclined-plane 49 forms in the bottom of lower plate 40, these can be found out in Fig. 3 especially.

Supporting extension 47 has two zonal holes 52 and 53 at centrage 11 and 21 places as the bearing-surface on the surface 51 of fixture block 50 on fixture block, be used for regulating the screw thread part 17 and 27 of bolt 10 and 20.

In the described in front embodiment, device is mounted on the domed support, the cross section 71(that this carriage has two trianglees formation of soffit of girder connection sees Fig. 1), an inclined notch 54 is arranged on the fixture block 50, arched member 70 is supported between the notch 48 and said notch 54 of lower plate 40.

As what pointed out just now, said embodiment relates to a plan and is contained in device on the domed support.For this reason, part 30,40 and 50 is all a little a bit crooked, and especially as can be seen from Figure 4, it is complementary with the curvature of the domed support that described device is installed.Much less, in other embodiments, clamping element 30 and 40 and fixture block 50(if any) all be flat, and not crooked.

On the other hand, be the outside that is used for clamping arched member in the location of this explanation and fixture, but needn't depart from scope of the present invention that people certainly similarly make a kind of device of the installed inside at arched member.

Clamping element 30 and 40 and fixture block 50 can make of light-alloy, but also can make of being suitable for the disinfectant synthetic material.

As for spherical the sleeve pipe 60 of planning to be clamped between element 30 and 40, it can include two external parts 61 and 62 that distribute in spheroid 63 both sides as shown in Figure 3.In the improvement project of Fig. 1 and Fig. 2, have only one to cross out end 64, its centre bore 65 is used for guiding a frame bars or other to connect parts.

In improvement project shown in Figure 5, sleeve pipe entirely is made up of a spherical surface body 63.The facet of attention in this figure, although it has drawn in Fig. 1 and Fig. 2, picture is unclear.

The sleeve pipe of Fig. 5 and Fig. 6 comprises two housings 66 and 67, and each housing comprises a groove 68 or 69 again.The size that these grooves had be enough to be fixedly clamped bar or a horizontal pin that is contained in the central through hole 65, and guarantee that lengthwise movement and rotation do not take place for they.

In the improvement example of Fig. 6 A, has semicircular cross section by each half housing 66 or 67 formed grooves 68.

On the other hand, groove 69 can have the cross section of antiparallelogram, and wherein trapezoidal hypotenuse and the angle that forms perpendicular to the other vertical line on both sides more than or equal to 7 ° are shown in Fig. 6 B.The skin of the sphere sleeve pipe of representing among Fig. 7 63 is made up of hexagonal facet, much less adopts other polygons to be fine equally.

Fig. 8 represents is the core of sleeve pipe 60 shown in Figure 3, and it has the extension 61 and 62 that splits in spheroid 63 both sides, and said core has been amplified widely.Notice that successive facet 81 is to separate regularly and be configured on the sleeve surface.

Shown in Figure 9 is the partial enlarged drawing of facet 81, and its explanation facet 81 is connected to adjacency circle 82 in being, and the round heart district therein of each group has another circle and other four circles intersect, and the result has caused sharp rib 83, and the corner angle 84 of facet 81.Circle 82 preferably has such size, and it makes and is connected to from ball 63 scheming in single faceted several corner angle and is about in 10 ° the angle.

The profile of Figure 10 is that the X-X line by Fig. 9 draws, so that and intersect with all public corner angle 84 of the successive facet 81 of string.Like this, each corner angle 84 all be one will with the pod 35 and the 43 contacted summits of last lower plate 30 and 40.

The profile of Figure 11 is that the XI-XI line by Fig. 9 obtains, so that intersect vertically with sharp rib 83.

In the Fig. 9 to Figure 11 corresponding to first embodiment, facet is planar, and (corresponding to Figure 11) facet 81 then is a curved surface in improvement project shown in Figure 12.Therefore obtain sharper summit, and such summit can be more effectively fixing in the pod 35 and 43 of train wheel bridge 30 and lower plate 40.

In addition, for the people who is proficient in this respect technology, facet can be clearly with other polygon also.The purpose (no matter being planar or curved surface) of facet is provided, can thinks to clamp tightly with clamping plate in order between facet, to produce sharp rib or summit, to make.

In general, sleeve portion 60 is to be used to cross and block diameter at 2 to 8 millimeters pin or bar.Therefore, land portions 63 typical diameters are between 15 to 20 millimeters.

As general rule, last lower plate 30 and 40 is to make with the material that hardness is lower than sleeve pipe 60.Thus, the shell of clamping plate formation has more elasticity than sleeve pipe land portions 63.As condition, there is lot of materials to choose.For example, sleeve pipe 60 can be a tempered steel, and clamping plate are non-tempered steels.In addition, the steel sleeve pipe can match with the clamping plate of light-alloy, or the clamping plate of light-alloy sleeve pipe and low hard-caked sediment material, matches as the clamping plate of plastics.

Now, Fig. 1 is elaborated to the location shown in Figure 4 and the use of fixture.

In all cases, primary is to determine desired telescopic form in device, be with having the sleeve pipe (see figure 3) of two extending transversely portions 61 and 62 actually, still with the sleeve pipe (Fig. 2) that an extending part 64 is arranged, or with the spherical sleeve pipes (Fig. 5) of simple two hemispherical shells 66 also allowable and 67 compositions.

The diameter of centre bore 65 is chosen by used assembly parts.

Then, handle assembly directly is contained on the arched member, and certainly this moment also must be with in bolt 10 and the 20 firm corresponding banded through holes 52 and 53 that are tightened in fixture block 50.Land portions 60 and arched member 70 dispose as requested.

People are appreciated that 37 and 38 on the train wheel bridge 30 now, the effect of 45 and 46 these several lateral clearance of lower plate 40, and they allow barrel portion 64 or 61,62 not be orientated by the restraint of liberty of clamping element 30 and 40.

When reaching correct Position Control, can tight a bolt and 10 and 20 will install pinning.Certainly, whenever still it can be unclamped afterwards to allow to do any levelling.

When centrage 11 and 12 is discussed back is not strict parallel, but when forming about 10 ° of angles mutually, how just will understand the present invention and be owing to tight a bolt to make clamping element 30 and 40 crooked and fixedly making improvements sleeve pipe and arched member.

Because the distortion that bending produced of clamping element 30 and/or 40 is compensated by the effect of pad 13 and 23.The sphere of pad 15 or 25 is to be bearing in the counterbore 33 and 34 of sphere or taper partly, and when frictional force reduced, they played the increase clamping force.In actual the use, the land portions 15 of pad and 25 should be got such size, so that come in contact with corresponding counterbore near the central authorities of ball.

What be also pointed out that is the groove 36 and 44 of upper and lower clamping plate 30 and 40, is respectively applied for the elasticity that increases clamping element 30 and 40, and because they can increase the supporting-point of sleeve pipe land portions in pairs, has therefore strengthened clamping force.

Drawn second kind of embodiment of location and fixture of Figure 13 to Figure 15, it is used for external fixation device equally.This device mainly is made up of fixation kit 100 and location clamping element 110.

Fixation kit 100 clamps several by bolt 101 and 102 and runs through pin, and train wheel bridge 103 and lower plate 104 have several through holes 105 that the clamping of being used for runs through pin (not drawing among the figure) for this reason.

Clamping runs through fixation kit 100 that pin uses and also comprises the cylinder partly 106 that has inner circular groove (not drawing), and it is used for cooperating with clamping element 110.

For this reason, clamping element 100 is made up of two clamping parts 111 and 112, and their bottom has the foot 113 and 114 of the inner circular groove that is suitable for inserting cylinder 106.Parts 111 and 112 upper end are furnished with wing nut 116 by one and screw rod 115 passes across.Parts 111 and 112 accompany a sleeve pipe 120(Figure 14 who is made up of two column 121 and 122), column 121 and 122 self is installed with a bar 123 again in their convenience center hole.As previously mentioned, the cross section of this centre bore can be polygonal.

When parts 111 and 112 are tightened under the effect of nut 116, foot 113 and 114 will be bearing in the groove of column 106 tightly, and prevent that top device 110 from rotating.Clamping part 111 and 112 has mutual spheroidal surface 117 and 118 in the face of configuration, and thus with surperficial 123 and 124 clampings of the spheroidal of column 121 and 122.Surface 123 and 124 presents rectangle facet in a row, forms sharp rib between facet.In the embodiment of Figure 14, facet in a row is to arrange along the band of cutting apart of the horizontal ball lid of land portions or column 121 and 122.In such cases, facet is a plane facet of using the material harder than the material of parts 111 and 112 to make.

In the improvement example of Figure 15, parts 111,112 have and the identical structure of parts among Figure 14 except that inner surface 117 and 118 is Frusto-conical depression.Being used for the column 121,122 of clamping bar 123 has Frusto-conical lateral part 125,126 equally, and it presents a succession of rectangle facet of arranging along the truncated cone bus.Form sharp rib little between flat, they will pressurize on the smooth to the parts 111 that have frustum of a cone accordingly and 112.The material manufacture the same as previous embodiment, that column 121 and 122 usefulness are harder than parts 111,112 with its improvement.

At this, described embodiment and theys' improvement has proposed a kind ofly under clamping plate are assisted parts to be positioned and stationary device, and it has much better clamping effect than known so far any device in the prior art.This effective clamping action is to be provided by a succession of facet on clamped parts or little curved surface, and these facets are arranged in the outside of the parts that will clamp in the mode that forms sharp rib or summit between the adjacent facet.The band facet will to clamp with fixed parts be to use the material harder than clamping plate to make.Make the sharp rib and the summit that form by facet in clamping plate, can produce strain like this, and produce a kind of effect that especially effectively clamps thus.For the people who is familiar with this technology, obviously clear, facet can be replaced and be placed on the clamping plate, and in this case, clamping plate are used the material manufacture harder than clamped parts.

Claims (16)

1, a kind ofly comprises that one positions with fixed parts with the system of this positioning parts and stationary device, described device comprises that two are assembled into the pressured clamping plate that clamp described parts mutually, it is characterized in that one of them parts in described parts and the clamping plate include at least one zone, its cross section is circular, at least one part that covers at least one zone is arranged in described at least one zone regularly by facet one by one, and adjacent facet engages with the obtuse angle, and the boundary line between the adjacent facet is sharp rib or summit.

2, device as claimed in claim 1 is characterized in that the parts that are positioned and fixed present round profile, and a Yuan Xing part disposes described a succession of facet at least, and the clamping plate surface that contacts with described parts is slick.

3, device as claimed in claim 1 is particularly in wanting localized parts to be made up of faceted sleeve pipe a spheroid or one at least one section.

4, device as claimed in claim 3 comprises a centre bore that is used for installing a bar particularly in described spheroid.

5, device as claimed in claim 4 is characterised in that described spheroid is to be divided into two-part along the centre bore axis.

6, device as claimed in claim 4 is characterised in that described spheroid and becomes one at the extension of this above centre bore of spheroid both sides.

7, device as claimed in claim 1, be characterised in that described parts to be shaped as at least one section be that little flat cylinder is arranged.

8, device as claimed in claim 7 is characterised in that faceted part has the shape of frustum of a cone.

9, device as claimed in claim 8 is characterised in that described cylinder includes a centre bore with its axis normal.

10, device as claimed in claim 9 is characterised in that described cylinder is divided into two parts along the axis of centre bore.

11, device as claimed in claim 1 is characterised in that described a succession of facet is configured in than on the harder material of the material that clamps said facet zone.

12, device as claimed in claim 11 is characterised in that described material is respectively tempered steel and tempered steel not.

13, device as claimed in claim 11 is characterised in that described material is respectively steel and light metal.

14, device as claimed in claim 11 is characterised in that described material is the light metal alloy of different hardness.

15, device as claimed in claim 11 is characterised in that described material is respectively light metal and plastics or synthetic material.

16, device as claimed in claim 11 is characterized in that said material is the synthetic material of different hardness.

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