CN103671455B - The anti-bending mechanism of screw thread - Google Patents
The anti-bending mechanism of screw thread Download PDFInfo
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- CN103671455B CN103671455B CN201310691544.2A CN201310691544A CN103671455B CN 103671455 B CN103671455 B CN 103671455B CN 201310691544 A CN201310691544 A CN 201310691544A CN 103671455 B CN103671455 B CN 103671455B
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Abstract
The anti-bending mechanism of screw thread, comprise cylinder and nut, cylinder is fixed by nut, cylindrical bar described in it comprises thread section, a shaft part, described nut comprises internal thread, spider section, and when the thread section of nut and cylinder screws, a shaft part and spider section Spielpassung form supporting section.The present invention protects cylindrical thread section by the spider section on nut to the radial constraint that cylinder props up shaft part, avoids the bending of thread section on cylinder; And utilizing the location fit of spider section and fulcrum, the bending of cylindrical thread section is obviously protected.Also be provided with compensating groove, make the position that cylinder is bending controlled flexibly.
Description
Technical field
The present invention relates to thread mechanism, particularly improve the anti-bending ability of thread mechanism thread section.
Background technique
Thread mechanism is a kind of conventional retention mechanism, and for fixing or supporting other objects, it generally comprises cylinder and nut, and cylinder makes the two combine by the screw thread on it and nut screw connection.Existing thread mechanism, cylinder and nut are provide tension load by the mode of thread engagement substantially, thrust load in structure is all born by the screw thread of cylinder, and cylindrical thread section is concentrated because of the unavoidable stress of the reason such as material, processing, the thrust load on each button thread is distributed uneven again, when being particularly applied in dunnage, the shearing force of cylindrical threaded portion is applied to during dunnage bending deflection, very severe, result causes cylinder very fast tired, loses efficacy eventually to fracture.
Summary of the invention
The technical problem to be solved in the present invention be overcome prior art above-mentioned deficiency and provide a kind of screw thread anti-bending mechanism, thread section when making cylinder and nut screw connection on cylinder is protected, and is not easy to be bent.
It is as follows that the present invention solves the problems of the technologies described above adopted technological scheme:
For convenience of explanation of the present invention, this region passive of matching with a certain circular hole in cylindrical shape part is called a shaft part, and be enclosed within a shaft part with prop up this section that shaft part coordinates and be called spider section, the two is combined together to form supporting section.
During as cylinder and nut screw connection, the sub-fraction in the forward and backward region of cylindrical thread section is called a shaft part, and the forward and backward region of nut inner thread section and pull bar prop up the part that shaft part coordinates and be called spider section.
In like manner, when nut coordinates with dunnage, when dunnage holding nut, in dunnage, one section of holding nut is called a shaft part, that section coordinated with a shaft part in corresponding nut is spider section, or when nut enter support plate hole time, the supporting section that nut outer round surface is arranged is named and props up a shaft part, and corresponding dunnage endoporus and nut prop up that section that shaft part matches and be spider section.
The anti-bending mechanism of screw thread, comprise cylinder and nut, cylinder is fixed by nut, it is characterized in that: described cylinder comprises thread section, a shaft part, described nut comprises internal thread, spider section and props up shaft part outward, after the thread section of nut and cylinder screws, spider section and fulcrum section Spielpassung form supporting section.
Better, above-mentioned Spielpassung is preferably location fit or is slidably matched.
Better, above-mentioned spider section and the intersegmental gap of fulcrum better less, the gap effect that goes to zero is better, because fulcrum can be made so to be better subject to spider constraint thus to make thread section be tending towards minimum by shearing, more effectively protects screw thread.
Better, above-mentioned supporting section is respectively in the front and back of threaded engagement section.
Better, above-mentioned nut arranged outside props up shaft part, and corresponding dunnage endoporus arranges spider section, and when cylinder is fixed to dunnage by nut, nut props up shaft part and dunnage spider section forms supporting section.
Better, forward and backward two regions of above-mentioned nut inner thread arrange spider section, and on corresponding cylinder, forward and backward two regions of external thread section arrange a shaft part, and when cylinder is fixed to dunnage by nut, nut spider section and dunnage prop up the corresponding formation supporting section of shaft part.
Better, above-mentioned pull bar also arranges compensating groove, and shape and position controlled flexibly.
The thread profile of above-mentioned thread section is not restricted, and can be the screw thread of any shapes such as V thread screw, square threaded form, trapezoidal thread, buttress thread form or circular thread.
Above-mentioned cylinder between shaft part and thread section, open tool withdrawal groove, the shape of tool withdrawal groove, the degree of depth and width with reference to GB, but can not do strict restriction.
The material of above-mentioned cylinder and nut is not restricted, and can be any type of material.
The invention has the advantages that: by the spider section on nut, cylindrical thread section is protected to the radial constraint that cylinder props up shaft part, avoid or weaken the bending of cylindrical thread section; By utilizing the location fit of spider section and fulcrum, the bending of cylindrical thread section is obviously protected.Also utilize dunnage cylindrical hole aperture spider and nut to prop up the location fit of shaft part outward, weaken impact stressed on ring surface when dunnage is out of shape, indirectly protect thread section.Also be provided with compensating groove, the position making cylinder bending and degree controlled flexibly.
Accompanying drawing explanation
The structural representation that Fig. 1 is the embodiment of the present invention cylinder when being pull bar.
Fig. 2 is the structural representation of embodiment of the present invention nut.
The structural representation that Fig. 3 is the embodiment of the present invention dunnage when being head mould plate.
Fig. 4 is the structural representation of embodiment of the present invention injection machine drag link mechanism.
Fig. 5 is the structural representation of anti-another embodiment of bending mechanism of screw thread of the present invention.
Fig. 6 is the structural representation of the another embodiment of the anti-bending mechanism of screw thread of the present invention.
Fig. 7 is the structural representation of the another embodiment of the anti-bending mechanism of screw thread of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, for the anti-bending mechanism of screw thread for drag link mechanism, and when drag link mechanism being applied to injection moulding head template, the invention will be further described.
As shown in Figure 1, injection machine pull bar 1 head arranges thread section 19, and the forward and backward region adjacent with thread section 19 arranges a shaft part 17 and a shaft part 18.
Between above-mentioned shaft part 17 and thread section 19, tool withdrawal groove 20 is also set, so that processing.
Above-mentioned shaft part 17, shaft part 18, tool withdrawal groove 20 and thread section 19 are coaxial.
Above-mentioned pull bar 1 also arranges compensating groove 3, controls the bending of pull bar 1 by profile and position.
As shown in Figure 2, nut inner thread section 12 arranges spider section 11 above, and nut inner thread section 12 arranges spider section 16 below.
Between above-mentioned spider section 11 and internal thread segment 12, tool withdrawal groove 10 is set, tool withdrawal groove 13 is set between spider section 16 and internal thread segment 12, so that processing.
Above-mentioned spider 11, spider 16, tool withdrawal groove 10, tool withdrawal groove 13 and thread section 12 are coaxial.
Also arrange a shaft part 15 outside above-mentioned nut one end, shaft part 15 one end and nut side form ring surface 14, and this ring surface 14 hardens when closing with head mould and is close on head mould plate.
As shown in Figure 3, head mould plate 2 is arranged tie rod hole 21, also arrange head mould plate spider section 22, this spider section 22 coordinates with the lateral branch shaft part 15 on nut and forms supporting section.
As shown in Figure 4, the drag link mechanism of injection machine, it comprises pull bar 1, head mould plate 2, pull-rod nut 8, and pull bar 1 is fixed by pull-rod nut 8 through after the tie rod hole 22 in head mould plate 2.
When above-mentioned pull bar and nut are fixed, nut inner thread and pull bar outside thread screw and form threaded engagement section 7 and link together securely, form spider and fulcrum junction plane 6 at pull bar and nut thread section 7 front end by a shaft part of pull bar and the spider section of nut, thus retrained the bending of propping up shaft part to prevent to inner threaded engagement section 7 by spider section.
Above-mentioned pull bar and the nut thread section of screwing 7 rear end form spider and fulcrum junction plane 9 by a shaft part of pull bar and the spider section of nut, thus are retrained by spider section and prop up shaft part and protect threaded engagement section 7 better.
Above-mentioned pull bar also arranges compensating groove 3, and to weaken better, the load that transfer threaded engagement section 7, junction plane 6 and junction plane 9 are subject to, prevents the threaded engagement section of pull bar from concentrating stressed and destroying.
As shown in Figure 1, Figure 2, Figure 4 shows; pull-rod nut 8 outer surface arranges the spider 22 of shaft part 15 and ring surface 14 and head mould plate 2 and tie rod hole end face and coordinates and form annular junction plane 5; this cooperation easily can be inserted in nut and be advisable; mainly weaken impact stressed on ring surface 14 when template 2 is out of shape, indirectly protect thread section.
Above-mentioned spider and fulcrum take micro-gap location fit or small―gap suture to be slidably matched, and gap is little as far as possible and ensure that nut freely can screw in back-out.
Above-mentioned drag link mechanism also has various embodiment, as shown in Fig. 5, Fig. 6, Fig. 7.
Fig. 5 is another embodiment, and it is compared with Fig. 3, only reduces the spider between a pull bar and head plate and fulcrum junction plane 4, also can meet the demands when condition is not too strict.
Fig. 6 is another embodiment, and it is compared with Fig. 3, the spider between pull bar and head plate and fulcrum junction plane 4 setting position is changed, and will prop up shaft part and be arranged on a plate, spider section is arranged on nut, to be applicable to various different actual demand.
Fig. 7 is another embodiment, and it is compared with Fig. 3, the relation between head plate and nut is changed, mutually do not support, all the other are constant, and owing to possessing fulcrum, a nested structure between pull bar and nut, anti-bending effect still can be played in the nut location therefore in drag link mechanism.
In like manner, drag link mechanism of the present invention can also be used in other mechanical fields.
Obviously, according to design of the present invention, cylinder can be not only the pull bar in above-mentioned injection machine field, also can be other cylindrical bodys of threaded section in mechanical field, and with corresponding nut screw connection.
Claims (7)
1. the anti-bending mechanism of screw thread, comprise cylinder and nut, cylinder is fixed by nut, it is characterized in that: described cylinder comprises thread section, a shaft part, described nut comprises internal thread, spider section and props up shaft part outward, after the thread section of nut and cylinder screws, spider section and fulcrum sector hole Spielpassung form supporting section.
2. the anti-bending mechanism of screw thread as claimed in claim 1, is characterized in that: described Spielpassung is location fit or is slidably matched.
3. the anti-bending mechanism of screw thread as claimed in claim 1, is characterized in that: described supporting section is respectively in the front and back of threaded engagement section.
4. the anti-bending mechanism of screw thread as claimed in claim 1, it is characterized in that: described nut arranged outside props up shaft part, corresponding dunnage endoporus arranges spider section, and when cylinder is fixed to dunnage by nut, nut props up shaft part and dunnage spider section forms supporting section.
5. the anti-bending mechanism of screw thread as claimed in claim 3, it is characterized in that: forward and backward two regions of described nut inner thread arrange spider section, on corresponding cylinder, forward and backward two regions of external thread section arrange a shaft part, when cylinder is fixed to dunnage by nut, nut spider section and dunnage prop up the corresponding formation supporting section of shaft part.
6. the anti-bending mechanism of screw thread as claimed in claim 1, is characterized in that: described cylinder also arranges variable compensating groove.
7. the anti-bending mechanism of screw thread as claimed in claim 1, is characterized in that: described cylinder props up between shaft part and thread section and also arranges tool withdrawal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310691544.2A CN103671455B (en) | 2013-12-17 | 2013-12-17 | The anti-bending mechanism of screw thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310691544.2A CN103671455B (en) | 2013-12-17 | 2013-12-17 | The anti-bending mechanism of screw thread |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103671455A CN103671455A (en) | 2014-03-26 |
| CN103671455B true CN103671455B (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310691544.2A Active CN103671455B (en) | 2013-12-17 | 2013-12-17 | The anti-bending mechanism of screw thread |
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| Country | Link |
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| CN (1) | CN103671455B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192557A (en) * | 1990-07-27 | 1993-03-09 | Nissei Jushi Kogyo K.K. | Clamping apparatus for molding machine |
| JP2002349529A (en) * | 2001-05-31 | 2002-12-04 | Toshiba Corp | Jointing device |
| JP3976691B2 (en) * | 2003-02-18 | 2007-09-19 | 東洋機械金属株式会社 | Injection device for electric injection molding machine |
| CN201535287U (en) * | 2009-08-25 | 2010-07-28 | 鞍钢股份有限公司 | Anti-bending-moment hydraulic cylinder end cover |
| CN202213128U (en) * | 2011-09-14 | 2012-05-09 | 宁波创基机械有限公司 | Tailboard protective component of plastic injection molding machine |
| CN103057065B (en) * | 2012-11-30 | 2016-05-18 | 海天塑机集团有限公司 | The drag link mechanism of injection machine |
| CN203702818U (en) * | 2013-12-17 | 2014-07-09 | 海天塑机集团有限公司 | Thread bending preventing mechanism |
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2013
- 2013-12-17 CN CN201310691544.2A patent/CN103671455B/en active Active
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| Publication number | Publication date |
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| CN103671455A (en) | 2014-03-26 |
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