CN2577032Y - Threaded connection pretightening structure - Google Patents
Threaded connection pretightening structure Download PDFInfo
- Publication number
- CN2577032Y CN2577032Y CN 02261503 CN02261503U CN2577032Y CN 2577032 Y CN2577032 Y CN 2577032Y CN 02261503 CN02261503 CN 02261503 CN 02261503 U CN02261503 U CN 02261503U CN 2577032 Y CN2577032 Y CN 2577032Y
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- screw
- tensioning screw
- pressing structure
- nut body
- scyewed joint
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Abstract
The utility model relates to an improvement for a high-strength threaded connection pre-tightening structure which mainly comprises a first fastener, a second fastener and a spiral cylinder arranged between the first fastener and the second fastener, wherein a nut body or a bolt head on one end of the spiral cylinder is provided with a plurality of screw holes on which corresponding tensioning screws are arranged; the other end of the tensioning screw is supported and pressed on the fastener which is stitched by the spiral cylinder. In this way, the nut body or the bolt head is not directly contacted with a junction surface but acts on the junction surface through a plurality of tensioning screws. Therefore, the utility model has the characteristics that the structure is reasonable and the size is small; the load on a ridge has uniform distribution and the stress distribution is reasonable; the integral rigidity of the screw connection is enhanced and the vibration resistance of the screw connection structure is enhanced; when a tool with a small tightening moment or a simple tool is used, the desired bigger and stable pre-tightening force can be reached, etc.
Description
Technical field
The utility model relates to the mechanical coupling field, especially relates to a kind of improvement of high strength scyewed joint pre-pressing structure.
Background technique
The mechanical fastener of two or more employing scyewed joint needs with high-strength bolt etc. connected member to be carried out pretension in many occasions, and its method mainly contains following several:
1, spanner impacts pinch bar with weight after in place on the hex head bolt head, and this method is very practical in some occasion, but uncontrollable moment of torsion, its pretightening force that can reach is less, and occupation space is bigger during installation, only be fit to the small dimension nut, operation has bigger danger, and labor intensity is big.
2, spiro column is carried out preheating and make its elongation, nut is installed then, treat just to realize pretension after its cooling is shunk.But its contour projector mainly consumes in the gap during at relaxed state between assembly parts.Dismantle pretty troublesomely, pretightening force control owes accurate.
3, adopt the hydraulic tensioning nut, need the expensive special device of preparation, take bigger installing space, the pretightening force that can reach is relatively low, the difficult control of pretension value.
4, adopt the torque multiplier fastening nut, this mode has only the energy of 10%-15% to be used for the elongation of bolt; And most of loss is in frictional force.During use, the difficult control of torque value, damaged screw easily; Dismounting more is a problem.In addition, also there is heaviness in torque multiplier and is difficult to operation, and energy consumption is very big, sleeve technical problem such as cost an arm and a leg.
Someone also proposes patent application with regard to relevant structure.For example, be called " a kind of anti-screw thread release mechanism " (95231763.X), relate to the bindiny mechanism that anti-sucker rod and oil pump plunger piston screw thread get loose, it is to adopt to be threaded at existing pumping unit easily to get loose or thread off disadvantage, installs lower ring gear and disclose in a kind of tube, is equipped with one therebetween and can slide up and down and have the pull bar of plum blossom tooth head, be equipped with the mechanism that connects with joint on the tube and under the bar, thereby guaranteed screw connection point, in moving up and down, produced a pretightening force all the time.But its structure is still very imperfect, and application area is less.
Summary of the invention
The utility model mainly is that to solve the apparatus structure of existing in prior technology prefastening torque comparatively complicated, and price is more expensive, operates the technical problem of comparatively inconvenience etc.; Its main purpose is to provide a kind of can use simple tools and less tightening torque, the structure of required bigger pretightening force when reaching high-strength bolt or screw and installing.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: it comprises first connected member and second connected member and is arranged at therebetween spiro column, and the nut body of described spiro column one end or bolt head be provided with several screws, and it is provided with corresponding tensioning screw; The other end roof pressure of described tensioning screw is on the connected member that is subjected to the spiro column pressing.Like this, described nut body or bolt head directly do not contact with junction plane, but act on the junction plane by several tensioning screws.The described connected member or first connected member and second connected member can appellation or location swaps.
As preferably, described tensioning screw is uniform to be arranged on the concentric circle of described nut body or bolt head; And between its tensioning screw end and connected member, be provided with high-strength steel washer.
As preferably, described tensioning screw is isometrical and be symmetrical distribution, and its axis parallels with the axis of spiro column; And described tensioning screw number is advisable with three or four integral multiple.
As preferably, described high-strength steel washer can adopt composite material, and its to deviate from tensioning screw side quality softer.
As preferably, the screw that is provided with on described nut body or the bolt head can also embed steel-wire screw-socket.
As preferably, the plane that holds out against flush end of described tensioning screw is provided with annular oil groove.
As preferably, described tensioning screw is heavy to be placed in the body of bolt or the nut body, screws in backing-up screw in its screw and props up tensioning screw.
Therefore, the utlity model has rational in infrastructure, volume is less, load is evenly distributed on the worm tooth, stressed distribution is reasonable, makes the double-screw bolt physical efficiency bear bigger power and deformation is less, improves the integral rigidity of scyewed joint and the resistance to shock of thread joined structure, use less tightening torque and simple tools simultaneously, two connected members that can will be engaged with each other transfer to required bigger and stable characteristics such as pretightening force.
Description of drawings
Fig. 1 is a kind of structural representation of fixed two conjunctions in the utility model.
High strength scyewed joint pre-pressing structure schematic representation in Fig. 2 the utility model.
Fig. 3 is the another kind of structural representation of fixed two conjunctions in the utility model.
Fig. 4 is an another kind of scyewed joint pre-pressing structure schematic representation in the utility model.
Fig. 5 is the structural representation of a kind of tensioning screw in the utility model.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: a kind of high strength scyewed joint pre-pressing structure 1 is used for the fixed conjunction 3 and second conjunction 2, is located at the perforation 21 on two conjunctions respectively, arranges being aligned, and the outer side surface of conjunction 3 is that the opposed outer side surface of 32, the second conjunctions 2 is 22.High strength scyewed joint pre-pressing structure comprises: a nut body 11, one group of tensioning screw 12 and high-strength steel washer 13; Nut body 11 have with spiro column 4 on thread section 41 111, two the first relatively independent reference levels 113 of internal thread and second reference level 114 that screw togather, with and one group little screw 112 of circumferential arrangement.Little screw axis line parallel is in main spiro column axis.Little screw runs through first reference level 113 and second reference level 114 (referring to accompanying drawing 1 and accompanying drawing 2) on the nut body 11.
One end 121 of tensioning screw 12 is used to apply moment of torsion, and the other end is for holding out against flush end 123.Wherein hold out against on the plane of flush end and can be provided with annular oil groove (as shown in Figure 5).High-strength steel washer can be sheathed around spiro column, and it has vertical stud body 4 and opposed first reference level 131 and second reference level 132.Its first reference level 131 pushes against by the end that holds out against of tensioning screw, and forces second reference level 132 of high-strength steel washer 13 and the outer side surface 32 of conjunction 3 to be fitted (as shown in Figure 2).
When the conjunction 3 of above-mentioned high strength scyewed joint pre-pressing structure and second conjunction, 2 concrete mutuallies, earlier high-strength steel washer 13 is set on the spiro column 4, the outer side surface of its second reference level 132 and second conjunction 2 is opposed.Utilize simple tool or manual first reference level 131 that thread section 41 on the nut body 11 screw-in spiro columns 4 is propped up high-strength steel washer 13 until second reference level 114 of nut body 11.After holding out against on the flush end 123 of one group of tensioning screw 12 applied lubricating ester, screw in one group little screw 112 of circumferential arrangement of nut body 11 with instrument, and make first reference level 131 that flush end 123 pushes against high-strength steel washer that holds out against of tensioning screw 12 with certain moment.Force the spiro column 4 elongation tensionings that screw togather with nut body 11 to reach the purpose of pretension.The holding out against on the flush end 123 of tensioning screw 12 applies the friction torque that holds out against flush end 123 and 13 of high-strength steel washers that lubricating grease can effectively reduce tensioning screw 12, can control pretightening force accurately in the scope of presetting.Because nut body 11 forms after by the tensioning of tensioning screw 12 and suspends, one group of tensioning screw 12 after tightening by predetermined torque has just formed very strong grasp, has prevented becoming flexible of attachment bolt structure effectively.Simultaneously because nut body 11 and tensioning screw 12 have formed elastic structure after combination stressed, this elastic structure has reduced the thread section 41 on the spiro column 4 and the pitch difference in change of the screw thread 111 on the nut body 11, has improved load problem of uneven distribution on the worm tooth.
When needing, can with tensioning screw 12 heavy place or nut body 11 in, screw on backing-up screw 24 in the outer end of its screw, prop up tensioning screw 12, in case its possible absent-mindedness (referring to accompanying drawing 4).
Embodiment 2: when the conjunction 3 of high strength scyewed joint pre-pressing structure and second conjunction, 2 concrete mutuallies, earlier in the little screw 112 that steel-wire screw-socket 14 is screwed on the bolt head 11a, high-strength steel washer is set on the spiro column 4, the outer side surface of its second reference level 132 and second conjunction 2 is opposed again.Utilize simple tool or craft that bolt head 11a and nut 6 are screwed, prop up first reference level 131 of high-strength steel washer 13 until second reference level 114 of bolt head 11a.After holding out against on the flush end 123 of one group of tensioning screw 12 applied lubricating ester, screw in the steel-wire screw-socket 14 of having inserted in the little screw 112 with instrument, and make first reference level 131 that flush end 123 pushes against high-strength steel washer that holds out against of tensioning screw 12 with certain moment.Force the spiro column 4 elongation tensionings that screw togather with bolt head 11a to reach the purpose (referring to accompanying drawing 3) of pretension.The holding out against on the flush end 123 of tensioning screw 12 applies the friction torque that holds out against flush end 123 and 13 of high-strength steel washers that lubricating grease can effectively reduce tensioning screw 12, can control pretightening force accurately in the scope of presetting.Because bolt head 11a forms after by the tensioning of tensioning screw 12 and suspends, one group of tensioning screw 12 after tightening by predetermined torque has just formed very strong grasp, has prevented becoming flexible of attachment bolt structure effectively.Simultaneously because one group little screw 112 among the bolt head 11a has been inserted steel-wire screw-socket 14, formed elastic structure with tensioning screw 12 after combination stressed, this elastic structure has improved load problem of uneven distribution on the worm tooth effectively, improves the integral rigidity of scyewed joint and the resistance to shock of thread joined structure.Other unaccomplished matter is referring to embodiment 1.
Claims (10)
1. scyewed joint pre-pressing structure, comprise first connected member and second connected member and be arranged at therebetween spiro column, the nut body (11) or the bolt head (11a) that it is characterized in that described spiro column (4) one ends are provided with several screws, and it is provided with corresponding tensioning screw (12); The other end roof pressure of described tensioning screw (12) is on the connected member that is subjected to spiro column (4) pressing.
2. scyewed joint pre-pressing structure according to claim 1 is characterized in that on the uniform concentric circle that is arranged on described nut body (11) or bolt head (11a) of described tensioning screw (12); And between its tensioning screw (12) end and connected member (3), be provided with high-strength steel washer (13).
3. scyewed joint pre-pressing structure according to claim 1 and 2 is characterized in that described tensioning screw (12) is isometrical and is symmetrical distribution that its axis parallels with the axis of spiro column; And described tensioning screw (12) number is advisable with three or four integral multiple.
4. scyewed joint pre-pressing structure according to claim 1 and 2 is characterized in that described high-strength steel washer (13) can adopt composite material, and its to deviate from tensioning screw (12) side quality softer.
5. scyewed joint pre-pressing structure according to claim 3 is characterized in that described high-strength steel washer (13) can adopt composite material, and its to deviate from tensioning screw (12) side quality softer.
6. scyewed joint pre-pressing structure according to claim 1 and 2 is characterized in that the screw (112) that described nut body (11) or bolt head (11a) upward are provided with can also embed steel-wire screw-socket (14).
7. scyewed joint pre-pressing structure according to claim 3 is characterized in that the screw (112) that described nut body (11) or bolt head (11a) upward are provided with can also embed steel-wire screw-socket (14).
8. scyewed joint pre-pressing structure according to claim 1 and 2 is characterized in that the plane that holds out against flush end of described tensioning screw (12) is provided with annular oil groove.
9. scyewed joint pre-pressing structure according to claim 1 and 2 is characterized in that described tensioning screw (12) is heavy to place in bolt head (11a) or the nut body (11), screws in backing-up screw (24) in its screw and props up tensioning screw (12).
10. scyewed joint pre-pressing structure according to claim 3 is characterized in that described tensioning screw (12) is heavy to place in bolt head (11a) or the nut body (11), screws in backing-up screw (24) in its screw and props up tensioning screw (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02261503 CN2577032Y (en) | 2002-11-08 | 2002-11-08 | Threaded connection pretightening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02261503 CN2577032Y (en) | 2002-11-08 | 2002-11-08 | Threaded connection pretightening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2577032Y true CN2577032Y (en) | 2003-10-01 |
Family
ID=33728275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02261503 Expired - Lifetime CN2577032Y (en) | 2002-11-08 | 2002-11-08 | Threaded connection pretightening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2577032Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886961A (en) * | 2010-07-26 | 2010-11-17 | 西安理工大学 | Full-load static characteristic test device and test method of bolt joint surface unit |
| CN104384916A (en) * | 2014-12-01 | 2015-03-04 | 南京工业大学 | conical nut pushing and pre-tightening system |
| CN107269658A (en) * | 2017-08-07 | 2017-10-20 | 中国船舶重工集团公司第七0四研究所 | Uniaxial direct tensile pre-tensioned type tuning for Controllable Pitch Propeller blade trip bolt |
| CN107795560A (en) * | 2017-10-23 | 2018-03-13 | 安卡精密机械（天津）股份有限公司 | A kind of fixing bolt |
| CN108412837A (en) * | 2018-05-16 | 2018-08-17 | 无锡市威特机械有限公司 | Part retaining mechanism in a kind of extruder |
| CN108443299A (en) * | 2018-04-19 | 2018-08-24 | 无锡市威特机械有限公司 | A kind of extruder stop nut structure |
| CN110230632A (en) * | 2019-07-11 | 2019-09-13 | 海盐精工标准件厂 | A kind of self tapping self-drilling screw that anti-loosening effect is good |
| CN110864177A (en) * | 2019-10-11 | 2020-03-06 | 邯郸钢铁集团有限责任公司 | Rolling mill hydraulic joint anti loosening structure |
-
2002
- 2002-11-08 CN CN 02261503 patent/CN2577032Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886961A (en) * | 2010-07-26 | 2010-11-17 | 西安理工大学 | Full-load static characteristic test device and test method of bolt joint surface unit |
| CN101886961B (en) * | 2010-07-26 | 2011-11-16 | 西安理工大学 | Full-load static characteristic test device and test method of bolt joint surface unit |
| CN104384916A (en) * | 2014-12-01 | 2015-03-04 | 南京工业大学 | conical nut pushing and pre-tightening system |
| CN104384916B (en) * | 2014-12-01 | 2017-05-31 | 南京工业大学 | A kind of tapered cup nut pushing tow pretensioner systems |
| CN107269658A (en) * | 2017-08-07 | 2017-10-20 | 中国船舶重工集团公司第七0四研究所 | Uniaxial direct tensile pre-tensioned type tuning for Controllable Pitch Propeller blade trip bolt |
| CN107795560A (en) * | 2017-10-23 | 2018-03-13 | 安卡精密机械（天津）股份有限公司 | A kind of fixing bolt |
| CN108443299A (en) * | 2018-04-19 | 2018-08-24 | 无锡市威特机械有限公司 | A kind of extruder stop nut structure |
| CN108412837A (en) * | 2018-05-16 | 2018-08-17 | 无锡市威特机械有限公司 | Part retaining mechanism in a kind of extruder |
| CN110230632A (en) * | 2019-07-11 | 2019-09-13 | 海盐精工标准件厂 | A kind of self tapping self-drilling screw that anti-loosening effect is good |
| CN110864177A (en) * | 2019-10-11 | 2020-03-06 | 邯郸钢铁集团有限责任公司 | Rolling mill hydraulic joint anti loosening structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121108 Granted publication date: 20031001 |