CN206159234U - Mechanical stretching nut - Google Patents
Mechanical stretching nut Download PDFInfo
- Publication number
- CN206159234U CN206159234U CN201621104809.XU CN201621104809U CN206159234U CN 206159234 U CN206159234 U CN 206159234U CN 201621104809 U CN201621104809 U CN 201621104809U CN 206159234 U CN206159234 U CN 206159234U
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- China
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- nut
- main part
- swivel nut
- packing ring
- overcoat
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Abstract
The utility model provides a mechanical stretching nut, including the switching swivel nut, nut overcoat, packing ring are coaxial locates the switching swivel nut outside, and the packing ring is located nut overcoat lower part, what the switching swivel nut included the main part and located the main part both ends is used for the external splines is connected with torsion balance mechanism, packing ring respectively, and inside the main part and outside all is equipped with the screw thread, the nut overcoat include the main part and locate main part one end, along the setting of circumferencial direction equidistance, be used for and apply the rectangle draw -in groove that moment of torsion mechanism is connected, the external screw thread assorted internal thread of swivel nut is equipped with inside the main part and switchovers, the inside external splines assorted internal spline that is equipped with and switchovers the swivel nut of packing ring. The utility model discloses a bolt only receives axial tension to improve the pretension precision, the thread of nut and bolt can not produce the friction, guarantees that the bolt can used repeatedly, gasket and do not had relative motion between the connecting piece can not damage by the connecting piece, installing safe in utilizationly, fastening fastly, the accuracy is high.
Description
Technical field
The utility model is related to a kind of mechanical stretching nut, belongs to technical field of fastening.
Background technology
Threaded connection is a kind of conventional fastening means, and its processing and manufacturing is simple, easy to install；Nut is matched somebody with somebody with bolt, pad
Conjunction is used, and with tightening tool turn nut, is realized fastening and is unclamped.This structure also has obvious shortcoming：
1st, during heavy duty, severe friction can occur between thread, fragile thread causes dismounting difficulty, can not reuse；
2nd, the contact surface of nut and connected piece has violent friction, may produce the damage of nut itself and connected piece
It is bad；
3rd, turning moment may be produced, generally requires particular tool to offset turning moment；
4th, the tightening way of plain nut can produce bias force to bolt, so as to affect the pretightning force precision of bolt, pre-
Whether the occasion that the uniform property of clamp force has high demands, need the elongation for measuring every bolt uniform to determine load, increases work
Amount；Bias force can also make complicated, the serious meeting damaged screw pair of nut and bolt stress.
For example, steam turbine cylinder split connection, needs larger bolt, pretightning force is big and uniform property require it is very high,
The overhaul of steam turbine duration is particularly compact, it is desirable to fastening and swiftness, connection the reliability dismantled.Using old-fashioned nut bolt
Connection, can be with tight, expensive hydraulic wrench system of the heat of simple hammering pretension, complicated and time consumption etc., but these methods are in fastening
Security, speed, all barely satisfactory on accuracy and cost.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of safer, fastening and dismantles speed faster, accurately
The mechanical stretching nut of Du Genggao.
In order to solve above-mentioned technical problem, the technical solution of the utility model is to provide a kind of mechanical stretching nut, and it is special
Levy and be：Including switching swivel nut, nut overcoat, packing ring are same to be located in switching swivel nut outside, and packing ring is located at nut overcoat bottom；
Switching swivel nut includes main part and being respectively used to and torsion balance mechanism, packing ring company located at main part two ends
The external splines for connecing, body portion thereof is provided with internal thread, and external screw thread is provided with outside main part；
Nut overcoat include main part and located at main part one end, be along the circumferential direction placed equidistant, for
Apply the rectangle draw-in groove that torque mechanism is connected, body portion thereof is provided with the interior spiral shell matched with the external screw thread of switching swivel nut
Line；
Bead interior is provided with the internal spline matched with the external splines of switching swivel nut.
Preferably, the main part of the switching swivel nut is threaded connection with the main part of nut overcoat, spiral shell of transferring
The bottom of set passes through spline connection with packing ring.
Preferably, the thread type and specification of the internal thread of the switching swivel nut are identical with associated bolt.
It is highly preferred that the external screw thread of switching swivel nut and the internal thread of nut overcoat are triangle thread or trapezoidal spiral shell
Line.
Preferably, the external splines of switching swivel nut and the internal spline of the packing ring are involute spline.
Preferably, described " switching swivel nut for the external splines that is connected with torsion balance mechanism " and " nut overcoat
For with apply the rectangle draw-in groove that is connected of torque mechanism " between be provided with interval.
Preferably, the torsion balance mechanism and applying torque mechanism are to be arranged concentrically.
The operation principle of the mechanical stretching nut that the utility model is provided is as follows：Mechanical stretching nut is used as an entirety portion
Part is screwed on bolt, and is adjacent to connected piece transverse plane.Apply the rectangle draw-in groove of torque mechanism attaching nut's overcoat, so as to
Drive nut overcoat is rotated.The external splines connection torsion balance mechanism of switching swivel nut, the effect of torsion balance mechanism is to ensure
When nut overcoat rotates, transfer swivel nut and bolt not transfer, so as to eliminate turning moment；Torsion balance mechanism and applying torque machine
Structure is concentric structure, so as to ensure fastener cycle in do not produce bias force；The external splines of switching swivel nut connects with the internal spline of packing ring
Connect, it is ensured that packing ring not transfer, so as to protect connected piece surface, while pad end flat Jing Nitrizing Treatments, case hardness compared with
, there is plucking phenomenon when can prevent or mitigate rotating nut overcoat in height.Because the screw thread of bolt and switching swivel nut does not rub
Wipe, so herein threaded connection will not fail because of severe friction；Presence without bias force simultaneously, bolt is only axially drawn
Power, so load accuracy is higher.
The device that the utility model is provided overcomes the deficiencies in the prior art, overcomes plain nut and tightening way is produced
Turning moment, bias force, make bolt only by axial tension, so as to improve pretension precision；The thread of nuts and bolt will not be produced
Raw friction, it is ensured that at least bolt can be reused；Without relative motion between special washer and connected piece, will not damage and be connected
Fitting；Additionally, because stress is simple, the probability of damage of its own is greatly reduced, using safer, speed is fastened and dismantled
Faster, accuracy is higher.
Description of the drawings
The structural representation of the mechanical stretching nut that Fig. 1 is provided for the present embodiment；
Fig. 2 is the structural representation of switching swivel nut：
Fig. 3 is the structural representation of nut overcoat；(a) front view, (b) top view；
Fig. 4 is the structural representation of packing ring；(a) top view, (b) front view；
Description of reference numerals：1-- switching swivel nuts, 2-- nut overcoats, 3-- packing rings；
Wherein：The internal thread of 1a-- switching swivel nuts；The external screw thread of 1b-- switching swivel nuts；1c, 1d-- external splines；
2a-- rectangle draw-in grooves；The internal thread of 2b-- nut overcoats；
3a-- internal splines.
Specific embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than restriction scope of the present utility model.In addition, it is to be understood that in the content for having read the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
The structural representation of the mechanical stretching nut that Fig. 1 is provided for the present embodiment, described mechanical stretching nut is by transferring
Swivel nut 1, nut overcoat 2, packing ring 3 are constituted.Nut overcoat 2, packing ring 3 are same to be located in the outside of switching swivel nut 1, and packing ring 3 is located at spiral shell
The bottom of female overcoat 2.
With reference to Fig. 2, switching swivel nut 1 includes main part, and body portion thereof is provided with internal thread 1a, its thread type and rule
Lattice are identical with associated bolt；External screw thread 1b is provided with outside main part, in the present embodiment, external screw thread 1b adopts trapezoidal spiral shell
Line, its feature is that gearing good, same torque ratio triangle thread produces bigger axial tension.Main part two ends set
There are external splines 1c, 1d, 1c, 1d are identical involute spline, and this structure is advantageous in that switching swivel nut 1 two ends are symmetrical, processing
Relatively easy, assembling will not malfunction.
With reference to Fig. 3, nut overcoat 2 includes main part, and main part top is along the circumferential direction equidistantly provided with multiple rectangles
Draw-in groove 2a, body portion thereof is provided with the internal thread 2b matched in the external screw thread 1b of switching swivel nut 1, in the present embodiment, interior spiral shell
Line 2b equally adopts trapezoidal thread.
With reference to Fig. 4, internal spline 3a is provided with inside packing ring 3, external splines 1c, 1d composition spline connection with switching swivel nut 1.Pad
The end flat Jing Nitrizing Treatments of piece 3, case hardness is higher.
The operation principle of the mechanical stretching nut in the present embodiment is as follows：Mechanical stretching nut revolves as a global facility
Close on bolt, and connected piece transverse plane is adjacent to.Apply the rectangle draw-in groove 2a of torque mechanism attaching nut overcoat 2, so as to drive
Dynamic nut overcoat 2 is rotated.The external splines 1c connection torsion balances mechanism of switching swivel nut 1, the effect of torsion balance mechanism is to protect
When card nut overcoat 2 rotates, transfer swivel nut 1 and bolt not transfer, so as to eliminate turning moment；Torsion balance mechanism and applying are turned round
Square mechanism be concentric structure, so as to ensure fastener cycle in do not produce bias force；The external splines 1d of switching swivel nut 1 and packing ring 3
Internal spline 3a connects, it is ensured that the not transfer of packing ring 3, so as to protect connected piece surface, while at the end flat Jing nitridings of pad 3
Reason, case hardness is higher, and plucking phenomenon occurs when can prevent or mitigate rotating nut overcoat 2.Because bolt and swivel nut 1 of transferring
Screw thread does not rub, so herein threaded connection will not fail because of severe friction；Presence without bias force simultaneously, spiral shell
Bolt only receives axial tension, so load accuracy is higher.
It is assumed that the mechanical stretching nut in the present embodiment is under case of heavy load, the spiral shell of its switching swivel nut 1 and nut overcoat 2
Line synetion severe friction and deform stuck, now need to dismantle if this mechanical stretching nut, only need to be anti-by nut overcoat 2
To unscrewing, after the amount of tension of pine to bolt is completely eliminated, the screw thread pair of switching swivel nut 1 and bolt is at relaxed state, i.e.,
Can the whole mechanical stretching nut of easy removal, it is time saving and energy saving.If common nut, bolt occur thread, and deformation is stuck, then whole
Individual unloading process will be laborious the stuck thread of rotation.
Claims (7)
1. a kind of mechanical stretching nut, it is characterised in that：Including switching swivel nut (1), nut overcoat (2), packing ring (3) are same to be located in
Switching swivel nut (1) outside, and packing ring (3) is positioned at nut overcoat (2) bottom；
Switching swivel nut (1) is including main part and being respectively used to and torsion balance mechanism, packing ring (3) located at main part two ends
The external splines of connection, body portion thereof is provided with internal thread (1a), and external screw thread (1b) is provided with outside main part；
Nut overcoat (2) including main part and located at main part one end, be along the circumferential direction placed equidistant, for apply
Plus the rectangle draw-in groove (2a) that torque mechanism is connected, body portion thereof be provided with switching swivel nut (1) external screw thread (1b) phase
The internal thread (2b) matched somebody with somebody；
The internal spline (3a) matched with the external splines of switching swivel nut (1) is provided with inside packing ring (3).
2. a kind of mechanical stretching nut as claimed in claim 1, it is characterised in that：The main part of switching swivel nut (1)
It is threaded connection with the main part of nut overcoat (2), the bottom of swivel nut (1) of transferring and packing ring (3) are by spline connection.
3. a kind of mechanical stretching nut as claimed in claim 1, it is characterised in that：The internal thread of switching swivel nut (1)
(1a) thread type and specification is identical with associated bolt.
4. a kind of mechanical stretching nut as claimed in claim 1, it is characterised in that：The external screw thread of switching swivel nut (1)
(1b) and the internal thread (2b) of nut overcoat (2) is triangle thread or trapezoidal thread.
5. a kind of mechanical stretching nut as claimed in claim 1, it is characterised in that：It is described switching swivel nut (1) external splines and
The internal spline (3a) of the packing ring (3) is involute spline.
6. a kind of mechanical stretching nut as claimed in claim 1, it is characterised in that：It is described " switching swivel nut (1) for torsion
The external splines of dynamic balance mechanism connection " and " nut overcoat (2) for the applying rectangle draw-in groove that is connected of torque mechanism
(2a) interval is provided between ".
7. a kind of mechanical stretching nut as described in claim 1 or 6, it is characterised in that：The torsion balance mechanism and applying
Torque mechanism is to be arranged concentrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621104809.XU CN206159234U (en) | 2016-10-08 | 2016-10-08 | Mechanical stretching nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621104809.XU CN206159234U (en) | 2016-10-08 | 2016-10-08 | Mechanical stretching nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206159234U true CN206159234U (en) | 2017-05-10 |
Family
ID=58652601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621104809.XU Active CN206159234U (en) | 2016-10-08 | 2016-10-08 | Mechanical stretching nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206159234U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654106A (en) * | 2018-12-25 | 2019-04-19 | 陕西东方航空仪表有限责任公司 | A kind of nut and the method for accurately controlling bolt pretightening |
| CN109973504A (en) * | 2019-04-15 | 2019-07-05 | 宝石机械成都装备制造分公司 | The anti-pull rod thread gluing combination nut of fracturing pump |
| CN110421342A (en) * | 2019-07-12 | 2019-11-08 | 中广核核电运营有限公司 | The cold clamping method of bolt on half speed unit high intermediate pressure cylinder split |
-
2016
- 2016-10-08 CN CN201621104809.XU patent/CN206159234U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654106A (en) * | 2018-12-25 | 2019-04-19 | 陕西东方航空仪表有限责任公司 | A kind of nut and the method for accurately controlling bolt pretightening |
| CN109654106B (en) * | 2018-12-25 | 2023-12-12 | 陕西东方航空仪表有限责任公司 | Method for accurately controlling bolt pretightening force |
| CN109973504A (en) * | 2019-04-15 | 2019-07-05 | 宝石机械成都装备制造分公司 | The anti-pull rod thread gluing combination nut of fracturing pump |
| CN110421342A (en) * | 2019-07-12 | 2019-11-08 | 中广核核电运营有限公司 | The cold clamping method of bolt on half speed unit high intermediate pressure cylinder split |
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