CN110159640A - A kind of anti-loosening screw nut assembly - Google Patents
A kind of anti-loosening screw nut assembly Download PDFInfo
- Publication number
- CN110159640A CN110159640A CN201910463620.1A CN201910463620A CN110159640A CN 110159640 A CN110159640 A CN 110159640A CN 201910463620 A CN201910463620 A CN 201910463620A CN 110159640 A CN110159640 A CN 110159640A
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- Prior art keywords
- nut
- screw
- screw thread
- groove
- protrusion
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- 238000000034 method Methods 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 12
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- 230000013011 mating Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/16—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention belongs to technical field of fastening more particularly to a kind of anti-loosening screw nut assemblies.Screw nut assembly includes screw rod；The first screw thread and the second screw thread are provided on screw rod, the first nut and the second nut are respectively arranged on two screw threads, wherein the hand of helix of the first screw thread and the second screw thread is opposite, along the axis direction of screw rod, first screw thread and the second screw thread are set gradually, and first screw thread be arranged close to the end of screw rod, the outer diameter of the outer diameter of the first screw thread less than the second screw thread；First nut is fluted towards the setting of the side of the second nut, and the side of the second nut towards the first nut is provided with protrusion, and in screw nut assembly use process, protrusion is located in groove, and protrusion and groove riveting punching combine；The side of protrusion is parallel with the axis of the second nut, and the side of groove is parallel with the axis of the first nut.The structure that the screw nut assembly has cooperation intensity high, the splendid effect of anti-loosing effect.
Description
Technical field
The invention belongs to technical field of fastening more particularly to a kind of anti-loosening screw nut assemblies.
Background technique
Self-locking nut is that one kind being capable of the self-locking nut of frictionally.General nut use process due to vibration etc. its
Its reason can be loosened voluntarily, to prevent this phenomenon, then just invent self-locking nut.Its function of self-locking nut is mainly anti-
Pine, antivibration.Its working principle is usually that frictionally is self-locking.Self-locking nut has embedding nylon ring, band by the type of function classification
It is that neck closes up plus metal locking device.
Such as application No. is 201811651537.9 Chinese patents to disclose a kind of conical surface wedging clinch fastener, including spiral shell
Head, screw rod and nut, the screw rod side wall include at least one oblong-shaped position-limited edge, are matched on the screw rod and screw rod phase
Matched anti-rotation locking cap offers a cylindrical cavity on one end face of locking cap, and one end face of nut is provided with
Cone cell holds out against head；The cone cell holds out against smallest cross-sectional radius of circle corresponding to a lateral wall and is less than cylindrical cavity radius, described
Cone cell holds out against maximum cross-section radius of circle corresponding to a lateral wall greater than cylindrical cavity radius.
Application No. is the Chinese patent applications of CN01135493.3 to disclose a kind of anti-loosen screw nut component, it includes spiral shell on one
A female and lower nut, one in two nuts protrudes part around a screwed Kong Youyi, shape in another nut
The recess suitable formed around its threaded hole, the protrusion part of a nut have a diminishing outer peripheral edge,
Diameter is gradually reduced in axis direction outwardly towards another nut, the inner peripheral of the outer peripheral edge of the protrusion part and recess it
One relative to respective screw hole formed slightly in eccentric and another of two outer peripheral edges is then coaxially formed with respective screw hole,
In, which includes at least a transverse lugs, which laterally protrudes from top nut, to be resisted against under a tightening tool
End, the shape of lug are designed to the naked eye find out its rotation angle.
Although above-mentioned two technical solution can have the effect of preventing nut from loosening to a certain extent, due to upper
Stating two kinds of structure types, there are following two technical problems:
Technical problem one: the contact surface between the two groove and protrusion is inclined-plane, under biggish vibration, if two nuts
Between relative displacement occurs after, since the contact surface between protrusion and groove is inclined-plane, the outer diameter with gradual change, groove and convex
Contact strength between rising can reduce, and even be mutually disengaged, and the self-locking effect of nut disappears.
The screw spiral line direction of two: two nut threads of technical problem connection is identical, even if will not send out between two nuts
Raw displacement, since hand of helix where the two is identical, two nuts may also be loosened integrally from screw rod.
In conclusion the problem of stop nut provided in the prior art can be got loose in use.
Summary of the invention
(1) technical problems to be solved
It is easy the technical issues of loosening for existing nut, the present invention provides one kind can be almost absolutely anti-loose
Anti-loosening screw nut assembly.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
A kind of anti-loosening screw nut assembly comprising screw rod, the first nut and the second nut；
The first screw thread and the second screw thread are provided on screw rod, wherein the hand of helix phase of the first screw thread and the second screw thread
Instead, it is set gradually along the axis direction of screw rod, the first screw thread and the second screw thread, and the first screw thread is arranged close to the end of screw rod,
Outer diameter of the outer diameter of first screw thread less than the second screw thread；
First nut thread is connected on the first screw thread, and the second nut thread is connected on the second screw thread, wherein the first spiral shell
Female fluted towards the setting of the side of the second nut, the side of the second nut towards the first nut is provided with protrusion, bolt and nut
In component use process, protrusion is located in groove, and protrusion and groove riveting punching combine；
The side of protrusion is parallel with the axis of the second nut, and the side of groove is parallel with the axis of the first nut.
Preferably, groove and the first nut are coaxially disposed, and the diameter of each position of groove is equal.
Preferably, protrusion is coaxially disposed with the second nut, and the outer diameter of each position of protrusion is equal.
Preferably, protrusion includes side and end face, and raised side and end face are perpendicular；
Groove structure includes side and bottom surface, and the side and bottom surface of groove are perpendicular.
Preferably, the arrival end of raised end and groove is provided with chamfering.
Preferably, the both ends of screw rod are provided with the first screw thread and the second screw thread.
Preferably, one end of screw rod is provided with the first screw thread and the second screw thread, and the other end of screw rod is provided with head.
Preferably, the section of the first nut and the second nut is hexagon.
Preferably, the surface of protrusion and groove is rough surface.
Preferably, the distance between raised side and screw axis are greater than distance between groove side and screw axis.
(3) beneficial effect
The beneficial effects of the present invention are:
The side of protrusion is parallel with the axis of the second nut, and the side of groove is parallel with the axis of the first nut, so, it is convex
It is equal apart from the distance between screw axis to play each point in face cooperated between groove, there is one very long connect between the two
Contacting surface after being subjected to displacement between even two nuts, still remains mating surface, and the intensity cooperated between protrusion and groove
It is inconvenient.Since the first nut and the second nut are generally metalwork, being rushed between metalwork by riveting is combined, bond strength pole
Height, that is, the two have very big frictional force, at all can not be by the first nut and the second nut point without enough axial forces
From.
Hand of spiral between first nut and the second nut is on the contrary, under the action of being shaken, if the first nut has
Have the tendency that loosening outward, needs to overcome the side-friction between protrusion and groove, in addition, due to the first nut and second
Nut thread is contrary, and when the first nut has the trend moved out, the second nut has the trend inwardly run, the
Two nuts can give one inward force of the first nut, prevent the first nut from running outward.Vice versa, when the second nut has outward
When the trend of operation, the first nut is inwardly run, and prevents the second nut from running outward.So, it can be deduced that, due to the first nut
And the second hand of spiral between nut is on the contrary, if nut gets loose the side-friction for having to overcome between protrusion and groove
Opposite effect power between power and two nuts.But the two power are only under the effect of external force, individually in vibration
It is difficult to overcome under effect.
Based on above content, it can be concluded that, the structure that screw nut assembly provided by the present application has cooperation intensity high is prevented
Loose excellent.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the anti-loosening screw nut assembly that the specific embodiment of the invention provides, wherein for body
The matching relationship of existing nut-screw, has done section processing for nut；
Fig. 2 is the structural schematic diagram for the first nut that the specific embodiment of the invention provides；
Fig. 3 is the structural schematic diagram for the second nut that the specific embodiment of the invention provides；
Fig. 4 is the structural schematic diagram for the screw rod that the specific embodiment of the invention provides；
Fig. 5 is another structural schematic diagram for the screw rod that the specific embodiment of the invention provides.
[description of symbols]
1: the first nut；2: the second nuts；3: screw rod；4: the first screw threads；5: the second screw threads；6: groove；7: protrusion；8: head
Portion.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
As shown in Figures 1 to 5, the invention discloses a kind of anti-loosening screw nut assemblies comprising the first nut 1, second
Nut 2 and screw rod 3.
The first screw thread 4 and the second screw thread 5 are provided on screw rod 1, wherein the helix side of the first screw thread 4 and the second screw thread 5
To on the contrary, along screw rod axis direction, the first screw thread 4 and the second screw thread 5 are set gradually, and the first screw thread 4 is close to the end of screw rod 3
Portion's setting, the outer diameter of the outer diameter of the first screw thread 4 less than the second screw thread 5.
First nut 1 is threaded on the first screw thread 4, and the second nut 2 is threaded on the second screw thread 5, wherein the
One nut 1 is arranged fluted 6 towards the side of the second nut 2, and the side of the second nut 2 towards the first nut 1 is provided with protrusion
7, in screw nut assembly use process, protrusion 7 is located in groove 6, and protrusion 7 and 6 riveting of groove punching combine.
The side of groove 6 is parallel with the axis of the first nut 1, and the side of protrusion 7 is parallel with the axis of the second nut 2.
Due to the screw thread contrary there are two sections of threaded lines, in order to make the second nut 2 smoothly be threaded in second
On screw thread 5, for the outer diameter of the first screw thread 4 less than the outer diameter of the second screw thread 5, i.e. the second nut 2 can be without hindrance from the first screw thread 4
On across such second nut 2 can be just threaded on the second screw thread 5.
Protrusion 6 and 7 riveting of groove punching cooperation refer specifically to, and with the rotation of the first nut 1, protrusion 7 can enter groove 6
It is interior, and the connection type of interference fit is formed between protrusion 7 and groove 6.It should be noted that groove 6 is arranged in the second nut 2
On, it is also equivalent with the mode limited in the application that protrusion 7, which is arranged on the first nut 1,.
The side of groove 6 it is parallel with the axis of the first nut 1, in particular to, the side of the upper section in the axial direction of groove 6
It is parallel with the axis of the first nut 1.It is understood that groove be one columnar structured.
The side of protrusion 7 it is parallel with the axis of the second nut 2, in particular to, raised 7 in the axial direction on section side
Side is parallel with the axis of the second nut 2.It is understood that protrusion 7 be a cylindrical structure.
In use, the second nut 2 is screwed in into the second screw thread 5 first, the first nut 1 is then screwed in into the first screw thread
4, during the first nut 2 screws in, the protrusion 7 on the second nut 2 enters in the groove 6 on the first nut 1, utilizes material
Between flexible deformation, raised 7 rivetings rush in groove 6, and interference fit, 1 He of the first nut are formed between protrusion 7 and groove 6
Second nut 2 firmly combines.
The fit system of first nut 1 and the second nut 2, firstly, mutual extrusion between protrusion 7 and groove 6, is capable of increasing
Frictional force between nut and screw thread plays anti-loose effect.
Being even more important is: each point in face cooperated between protrusion 7 and groove 6 is equal apart from the distance between 3 axis of screw rod,
There is a very long contact surface between the two, after being subjected to displacement between even two nuts, between protrusion 7 and groove 6
Mating surface is still remained, and the intensity cooperated is inconvenient.Between protrusion 7 and groove 6 there is very big frictional force to be not easy to loosen.
Finally, hand of spiral between the first nut 1 and the second nut 2 is on the contrary, under the action of being shaken, if first
Nut 1 has the trend loosened outward, needs to overcome the side-friction between protrusion 7 and groove 6, in addition, due to first
Nut 1 and 2 hand of spiral of the second nut on the contrary, when the first nut 1 have move out trend when, the second nut 2 have to
The trend of interior operation, the second nut 2 can give the first nut 1 one inward forces, prevent the first operation outward of nut 1.Otherwise also
So, when the second nut 2 has the tendency that running outward, the first inwardly operation of nut 1 prevents the second operation outward of nut 2.Therefore
This, it can be deduced that, due to the hand of spiral between the first nut 1 and the second nut 2 on the contrary, if nut gets loose and has to gram
Opposite effect power between side-friction and two nuts between clothes protrusion 7 and groove 6.But the two power unless
It is under the effect of external force, individually to be difficult to overcome under the action of vibration.
Based on above content, it can be concluded that, screw nut assembly provided by the present application is a kind of structure that cooperation intensity is high,
Anti-loosing effect is splendid.
Further, it in the disassembly process of the first nut 1 and the second nut 2, first has to fix the second nut 2, then
The first nut 1 is rotated, after the disassembly of the first nut 1, the second nut 2 is being rotated, the second nut 2 is removed.Spiral shell in the application
Female, bolt assembly can be used for multiple times due to that can be dismantled in this manner.
Groove and the first nut 1 are coaxially disposed, and the diameter of each position of groove is equal.Groove can be the first nut 1
Middle position be recessed inwardly the structure to be formed, be also possible to the annular groove being arranged around the threaded hole of the first nut 1, in order to
Easy to process, the preferred groove of the application is that the middle position of the first nut 1 is recessed inwardly the groove structure to be formed.
Protrusion 7 and the second nut 2 are coaxially disposed, and the outer diameter of raised 6 each positions is equal.Specifically, protrusion 7 is to surround
The structure of the threaded hole setting of second nut 2.
In Fig. 2, Fig. 3, α, β are 90 °.Specifically, protrusion 7 includes side and end face, raised side and end face phase
Vertically, groove includes side and bottom surface, and the side and bottom surface of groove are perpendicular.Right angle in so-called right angle riveting punching refers to this
Locate the structure type of the protrusion and groove, it should be noted that the side of protrusion 7 is parallel with the axis of the second nut 2, groove
6 side is parallel with the axis of the first nut 1, is groove 6 and raised 7 most important features.If end face or the groove 6 of protrusion 7
Bottom surface the deformation of applicability occurs also within the scope of the restriction of the application.
The end of protrusion 7 and the arrival end of groove 6 are provided with chamfering.By the setting of chamfering, enter convenient for protrusion 7 recessed
In slot 6.
The both ends of screw rod 3 are provided with the first screw thread 4 and the second screw thread 5.Corresponding both ends are provided with 1 He of the first nut
Second nut 2.
One end of screw rod 3 is provided with the first screw thread 4 and the second screw thread 5, and the other end of screw rod 3 is provided with head 8.It is corresponding
The first end of screw rod 3 be provided with the first nut 1 and the second nut 2, the other end is limited by head 8.
The section of first nut 1 and the second nut 2 is hexagon.
The surface of protrusion 7 and groove 6 is rough surface.By the way that the two is arranged to rough surface, can be improved between the two
Frictional force.
The distance between 3 axis of side and screw rod of protrusion 7 is greater than distance between 3 axis of 6 side of groove and screw rod.Therefore
This, can make to form interference fit between protrusion 7 and groove 6.
In addition, the mating surface between protrusion 7 and groove 6 is bigger, anti-loosing effect between the two is better, it is preferred that protrusion 7
The length of mating surface is not less than the radius of the first nut 1 and the/the second nut 2 between groove 6, and e.g., the length of mating surface is the
The length of the radius of one nut 1 and the/the second nut 2,2 times of 1.5 times of radius length or radius length.
Alternatively, mating surface length is not less than the half of 2 thickness of the first nut 1 and/or the second nut, e.g., the length of mating surface
Degree for the first nut 1 and the thickness of the/the second nut 2 half, 2 times of 1.5 times of thickness or thickness.
The technical principle of the invention is described above in combination with a specific embodiment, these descriptions are intended merely to explain of the invention
Principle shall not be construed in any way as a limitation of the scope of protection of the invention.Based on explaining herein, those skilled in the art
It can associate with other specific embodiments of the invention without creative labor, these modes fall within this hair
Within bright protection scope.
Claims (10)
1. a kind of anti-loosening screw nut assembly, it is characterised in that: including screw rod, the first nut and the second nut；
The first screw thread and the second screw thread are provided on screw rod, wherein the hand of helix of the first screw thread and the second screw thread is on the contrary, edge
The axis direction of screw rod, the first screw thread and the second screw thread are set gradually, and the first screw thread is arranged close to the end of screw rod, the first spiral shell
Outer diameter of the outer diameter of line less than the second screw thread；
First nut thread is connected on the first screw thread, and the second nut thread is connected on the second screw thread, wherein the first nut court
Fluted to the setting of the side of the second nut, the side of the second nut towards the first nut is provided with protrusion, screw nut assembly
In use process, protrusion is located in groove, and protrusion and groove riveting punching combine；
The side of protrusion is parallel with the axis of the second nut, and the side of groove is parallel with the axis of the first nut.
2. anti-loosening screw nut assembly according to claim 1, which is characterized in that groove and the first nut are coaxially disposed,
And the diameter of each position of groove is equal.
3. anti-loosening screw nut assembly according to claim 1, which is characterized in that protrusion is coaxially disposed with the second nut,
And the outer diameter of each position of protrusion is equal.
4. anti-loosening screw nut assembly according to claim 1, which is characterized in that protrusion includes side and end face, protrusion
Side and end face it is perpendicular；
Groove structure includes side and bottom surface, and the side and bottom surface of groove are perpendicular.
5. anti-loosening screw nut assembly according to claim 1, which is characterized in that the arrival end of raised end and groove
It is provided with chamfering.
6. anti-loosening screw nut assembly according to claim 1, which is characterized in that the both ends of screw rod are provided with the first spiral shell
Line and the second screw thread.
7. anti-loosening screw nut assembly according to claim 1, which is characterized in that one end of screw rod is provided with the first screw thread
The other end of second screw thread, screw rod is provided with head.
8. anti-loosening screw nut assembly according to claim 1, which is characterized in that the section of the first nut and the second nut
It is hexagon.
9. anti-loosening screw nut assembly according to claim 1, which is characterized in that the surface of protrusion and groove is coarse
Face.
10. anti-loosening screw nut assembly according to claim 1, which is characterized in that raised side and screw axis it
Between distance be greater than distance between groove side and screw axis.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910463620.1A CN110159640A (en) | 2019-05-30 | 2019-05-30 | A kind of anti-loosening screw nut assembly |
| PCT/CN2019/105940 WO2020237910A1 (en) | 2019-05-30 | 2019-09-16 | Anti-loose screw nut assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910463620.1A CN110159640A (en) | 2019-05-30 | 2019-05-30 | A kind of anti-loosening screw nut assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110159640A true CN110159640A (en) | 2019-08-23 |
Family
ID=67630697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910463620.1A Pending CN110159640A (en) | 2019-05-30 | 2019-05-30 | A kind of anti-loosening screw nut assembly |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110159640A (en) |
| WO (1) | WO2020237910A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020237910A1 (en) * | 2019-05-30 | 2020-12-03 | 深圳市南帝自行车有限公司 | Anti-loose screw nut assembly |
| CN113738777A (en) * | 2021-09-13 | 2021-12-03 | 中国联合重型燃气轮机技术有限公司 | Shaft coupling |
| CN115013406A (en) * | 2021-03-03 | 2022-09-06 | 俞桂凤 | Bolt assembly capable of not loosening |
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| CN2254967Y (en) * | 1996-07-18 | 1997-05-28 | 王小敏 | External locking type locknut screw pair |
| KR20020050089A (en) * | 2001-09-24 | 2002-06-26 | 김충익 | Bolt for preventing loosening |
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2019
- 2019-05-30 CN CN201910463620.1A patent/CN110159640A/en active Pending
- 2019-09-16 WO PCT/CN2019/105940 patent/WO2020237910A1/en active Application Filing
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020237910A1 (en) * | 2019-05-30 | 2020-12-03 | 深圳市南帝自行车有限公司 | Anti-loose screw nut assembly |
| CN115013406A (en) * | 2021-03-03 | 2022-09-06 | 俞桂凤 | Bolt assembly capable of not loosening |
| CN113738777A (en) * | 2021-09-13 | 2021-12-03 | 中国联合重型燃气轮机技术有限公司 | Shaft coupling |
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| Publication number | Publication date |
|---|---|
| WO2020237910A1 (en) | 2020-12-03 |
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