CN113339379A - Threaded connection structure and design method thereof - Google Patents
Threaded connection structure and design method thereof Download PDFInfo
- Publication number
- CN113339379A CN113339379A CN202110619077.7A CN202110619077A CN113339379A CN 113339379 A CN113339379 A CN 113339379A CN 202110619077 A CN202110619077 A CN 202110619077A CN 113339379 A CN113339379 A CN 113339379A
- Authority
- CN
- China
- Prior art keywords
- teeth
- lead
- threaded connection
- threaded
- connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 13
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
Images
Classifications
-
- 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
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computational Mathematics (AREA)
- Mechanical Engineering (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention relates to the technical field of connecting structures, and particularly discloses a threaded connecting structure and a design method thereof, wherein the threaded connecting structure comprises: the first connecting piece is provided with internal threads, and the lead of the internal threads is a first lead P1; a second connection having external threads with a second lead P2, and | P1-P2| ═ Δ ≠ 0; the length of the threaded connection between the internal thread and the external thread is H; if P1 is more than P2, the thickness of the teeth of the internal thread is P1/2, and the distance L1 between two adjacent spiral surfaces in two adjacent teeth of the external thread is more than or equal to P2/2+ delta H/P1; if P1 < P2, the thickness of the teeth of the external thread is P2/2, and the distance L2 between two adjacent spiral surfaces in two adjacent teeth of the internal thread is more than or equal to P1/2+ delta H/P2. The lead of the internal thread of the threaded connection structure is not equal to the lead of the external thread, and after the threaded connection structure is stressed, the displacement of each circle of thread is unequal, and the deformation rates are equal, so that each circle of thread of the threaded connection structure is stressed uniformly, and higher transmission strength of the threaded connection structure is realized.
Description
Technical Field
The invention relates to the technical field of connecting structures, in particular to a threaded connecting structure and a design method thereof.
Background
In the prior art, when a screw (or a bolt) is connected with a nut, the screw pitch of the screw (or the bolt) is the same as that of the nut so as to ensure smooth screwing. The screw (or bolt) with the same lead is matched with the nut, and because the lead is the same, under the loaded condition, the displacement of each tooth is equal, but the deformation rate corresponding to each thread is different, namely the stress state of each thread is different; the first turn of the thread, closest to the location of the load, carries about 60% of the load; the load applied to the second turn of threads is about 30%; the load on the remaining threads is about 10%; therefore, the effective stress thickness of the thread is 2.5 times of thread pitch, so that when the first circle of thread fails, the second circle of thread and the thread on the side, away from the first circle of thread, of the second circle of thread do not reach the limit stress state, the second circle of thread and the thread on the side, away from the first circle of thread, of the second circle of thread play a small role, and the load capacity of the screw (or the bolt) and the nut in the transmission process is poor.
Disclosure of Invention
An object of the present invention is to provide a threaded connection structure and a design method thereof to improve the stress uniformity of each turn of threads of a threaded connection part thereof, and to make full use of the threaded part, thereby achieving higher transmission strength of the threaded connection structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a threaded connection, comprising:
a first connecting piece, which is provided with an internal thread, wherein the lead of the internal thread is a first lead P1;
a second connecting piece, which is provided with an external thread screwed with the internal thread, wherein the lead of the external thread is a second lead P2, and | P1-P2| ═ Δ ≠ 0; the length of the threaded connection between the internal thread and the external thread is H; if the P1 is more than P2, the thickness of the teeth of the internal thread is P1/2, and the distance L1 between two adjacent spiral surfaces in two adjacent teeth of the external thread is more than or equal to P2/2+ delta H/P1; if the P1 is less than the P2, the thickness of the teeth of the external thread is P2/2, and the distance L2 between two adjacent spiral surfaces in two adjacent teeth of the internal thread is more than or equal to P1/2+ delta H/P2.
Preferably, the P1 > P2, the L1 is P2/2+ Δ H/P1, and when the first and second connecting members are unloaded, the clearance hN of two adjacent teeth of the internal thread and the external thread is (N-1) Δ, where N is 1, 2 … …, one pair of threaded teeth on the outermost side of the internal thread and the external thread is Y1, one pair of threaded teeth on the adjacent side of the Y1 is Y2, and so on, the other pair of threaded teeth on the outermost side of the internal thread and the external thread is YN, the clearance of the Y1 is H1, the clearance of the Y2 is H2, and so on, the clearance of the YN is hN.
Preferably, the P1 < P2, the L2 is equal to P1/2+ Δ H/P2, and when the first and second connecting members are unloaded, the clearance hN between two adjacent teeth of the internal thread and the external thread is equal to (N-1) Δ, where N is equal to 1, 2 … …, wherein one outermost pair of threaded teeth of the internal thread and the external thread is Y1, the one adjacent threaded tooth of the Y1 is Y2, and so on, the other outermost pair of threaded teeth of the internal thread and the external thread is YN, the clearance of Y1 is H1, the clearance of Y2 is H2, and so on, the clearance of YN is hN.
Preferably, Δ ═ ε 1 ═ P1+ ε 2 ═ P2, ε 1 is the elongation at break of the first connectors, and ε 2 is the elongation at break of the second connectors.
Preferably, the first connecting member is made of plastic, the second connecting member is made of metal, and Δ ═ 1 × P1.
Preferably, the second connecting element is made of plastic, the first connecting element is made of metal, and Δ ═ 2 × P2.
Preferably, the first connecting piece is a nut, and the second connecting piece is a bolt.
Preferably, the first connecting piece is a nut, and the second connecting piece is a screw.
Preferably, the first connecting piece is a nut, and the second connecting piece is a screw.
In order to achieve the purpose, the invention adopts the following technical scheme:
a threaded connection structure design method for a threaded connection structure as described above, the threaded connection structure design method comprising:
s1, determining the materials of the first connecting piece and the second connecting piece;
s3, determining one of the lead P1 of the first connector and the lead P2 of the second connector;
s2, calculating the Δ and the other of the lead P1 of the first connection and the lead P2 of the second connection from Δ | P1-P2| ═ epsilon 1P 1+ epsilon 2P 2.
The invention has the beneficial effects that:
the lead of the internal thread of the threaded connection structure is not equal to the lead of the external thread, and after the threaded connection structure is stressed, the displacement of each circle of thread is unequal, and the deformation rates are equal, so that the stress of each circle of thread of the threaded connection structure is uniform, each circle of thread is fully utilized, and the higher transmission strength of the threaded connection structure is realized. L1 is more than or equal to P2/2 +. DELTA.H/P1 or L2 is more than or equal to P1/2 +. DELTA.H/P2, namely if the first lead P1 of the first connecting piece is more than the second lead P2 of the second connecting piece, the thickness of the teeth of the second connecting piece needs to be reduced at the moment, so that the teeth of the first connecting piece are accommodated between the two teeth of the second connecting piece under the condition of no pressure, and the first connecting piece is smoothly screwed into the second connecting piece; on the contrary, if the first lead P1 of the first connecting element is smaller than the second lead P2 of the second connecting element, the thickness of the teeth of the first connecting element needs to be reduced, so that the teeth of the second connecting element are accommodated between the two teeth of the screw rod without being pressed, and the first connecting element is smoothly screwed into the second connecting element.
Drawings
FIG. 1 is a schematic view of a threaded connection provided by an embodiment of the present invention when unloaded;
fig. 2 is a schematic structural view of a fully loaded threaded connection according to an embodiment of the present invention.
In the figure:
1. a bolt;
2. a nut; 21. a first tooth; 22. a second tooth; 23. a third tooth; 24. and a fourth tooth.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the present invention, the directional terms such as "upper", "lower", "left", "right", "inner" and "outer" are used for easy understanding without making a contrary explanation, and thus do not limit the scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a threaded connection structure to improve each circle screw thread atress homogeneity of its screw thread spiro union part, make full use of screw thread part, thereby realize the higher transmission intensity of threaded connection structure.
As shown in fig. 1, the threaded connection structure provided in this embodiment includes a first connection member and a second connection member, the first connection member has an internal thread, the second connection member has an external thread screwed with the internal thread, wherein the first connection member is a nut 2, the second connection member is a bolt 1, a screw or a screw, and the embodiment takes the second connection member as the bolt 1 for example.
The lead of the internal thread is a first lead P1, the lead of the external thread is a second lead P2, and | P1-P2| (. DELTA. ≠ 0). The threaded length of the internal thread and the external thread is H, if P1 is more than P2, the thickness of the teeth of the internal thread is P1/2, and the distance L1 between two adjacent spiral surfaces of two adjacent teeth of the external thread is more than or equal to P2/2+ delta H/P1; if P1 < P2, the thickness of the teeth of the external thread is P2/2, and the distance L2 between two adjacent spiral surfaces in two adjacent teeth of the internal thread is more than or equal to P1/2+ delta H/P2.
The helical pitch of the internal thread of the threaded connection structure that this embodiment provided does not equal to the helical pitch of external screw thread, and after the threaded connection structure atress, the displacement volume of each circle screw thread varies, and the deformation rate equals to make each circle screw thread atress of threaded connection structure more even, each circle screw thread of make full use of realizes the higher transmission intensity of threaded connection structure, makes its bearing capacity improve more than 50%. L1 is more than or equal to P2/2 +. DELTA.H/P1 or L2 is more than or equal to P1/2 +. DELTA.H/P2, namely if the first lead P1 of the nut 2 is more than the second lead P2 of the bolt 1, the thickness of the teeth of the bolt 1 needs to be reduced, so that the teeth of the nut 2 are accommodated between the two teeth of the bolt 1 under the condition of no pressure, and the nut 2 is smoothly screwed into the bolt 1; on the contrary, if the first lead P1 of the nut 2 is smaller than the second lead P2 of the bolt 1, the thickness of the teeth of the nut 2 needs to be reduced so that the teeth of the bolt 1 are accommodated between the two teeth of the screw without being pressed, and the nut 2 is smoothly screwed into the bolt 1.
If P1 > P2, L1 is P2/2+ Δ H/P1, when the nut 2 and the bolt 1 are unloaded, the clearance hN of two adjacent teeth of the internal thread and the external thread is (N-1) Δ, where N is 1, 2 … …, where one pair of outermost threaded teeth of the internal thread and the external thread is Y1, one pair of adjacent threaded teeth of Y1 is Y2, and so on, the other pair of outermost threaded teeth of the internal thread and the external thread is YN, the clearance of Y1 is H1, the clearance of Y2 is H2, and so on, the clearance of YN is hN.
Similarly, when P1 < P2, L2 is P1/2+ Δ H/P2, and when the nut 2 and the bolt 1 are unloaded, the gap hN between two adjacent teeth of the internal thread and the external thread is (N-1) Δ, where N is 1, 2 … …, wherein one pair of threaded teeth on the outermost side of the internal thread and the external thread is Y1, one pair of threaded teeth adjacent to Y1 is Y2, and so on, the other pair of threaded teeth on the outermost side of the internal thread and the external thread is YN, the gap of Y1 is H1, the gap of Y2 is H2, and so on, the gap of YN is hN.
As shown in fig. 1, when the screw connection structure is unloaded or the bolt 1 starts moving relative to the nut 2 (pressing the nut 2 downward), the screw surface of the nut 2 of the pair of teeth Y1 located at the lowermost side in fig. 1 comes into contact with the screw surface of the nut 2 first, taking N as an example, and at this time:
the helicoid gap h1 of Y1 is 0;
the helicoid gap h2 of Y2 is Δ;
the helicoidal gap h3 of Y3 is 2 x Δ;
the helicoidal gap h4 of Y4 is 3 × Δ.
As shown in fig. 2, when the nut 2 is pressed downward (i.e., downward force is applied to the nut 2 as shown by the arrow in fig. 2), the first pair of teeth (i.e., the pair of teeth at the lowest side) first enters into transmission, and at this time, the first pair of teeth starts to be stressed; when the nut 2 rotates and the torque is further increased, the second pair of teeth (the pair of teeth adjacent to the first pair of teeth) starts to enter the transmission, the first pair of teeth is stressed, the second pair of teeth starts to be stressed, h2 is equal to 0, h3 is equal to delta, and h4 is equal to 2 x delta; the nut 2 is continuously pressed down, the torque is further increased, the third pair of teeth enters transmission, the first pair of teeth and the second pair of teeth are stressed at the moment, the third pair of teeth are stressed, h3 is equal to 0, and h4 is equal to delta; the rotation torque of the nut 2 is further increased, the fourth pair of teeth starts to bear force, and h4 is equal to 0; until four to the tooth all get into the meshing and four of nut 2 or bolt 1 are to when the tooth stress that receives is all when reaching the biggest bearing, four are to the tooth when all reaching the maximum strain state promptly, just reach threaded connection's the biggest stress state, this moment:
the sum of the total deformation and displacement of the first pair of teeth is: ε 1 × 4 × P1+ ε 2 × 4 × P2;
the sum of the total deformation and displacement of the second pair of teeth is: ε 1 × 4 × P1+ ε 2 × 3 × P2;
the sum of the total deformation and displacement of the third pair of teeth is: ε 1 × 4 × P1+ ε 2 × P2;
the sum of the total deformation and displacement of the fourth pair of teeth is: ε 1 × 4 × P1+ ε 2 × 1 × P2.
That is, the threaded connection structure provided by this embodiment can make the deformation rate of each tooth of the threaded connection the same, and the displacement amounts are different, so that the stress of each tooth is equal, and further, when the threaded connection structure is loaded, each tooth of the threaded connection can play a role.
The magnitude of Δ value of the threaded connection provided in this example is related to the amount of deformation under the maximum load to which the threaded connection is subjected, i.e., Δ ∈ 1 × P1+ ∈ 2 × P2, where ∈ 1 is the elongation at break of the nut 2, and ∈ 2 is the elongation at break of the bolt 1.
The nut 2 is made of plastic and the bolt 1 is made of metal, in which case the nut 2 has a much lower stiffness than the bolt 1, i.e. the nut 2 has a much higher elongation at break than the bolt 1, so that e 2P 2 can be ignored and Δ ═ e 1P 1. When the maximum stress state of the threaded connection structure is as follows:
the sum of the total deformation and displacement of the first teeth 21 of the nut 2 is: ε 1 × 4 × P1;
the sum of the total deformation and displacement of the second teeth 22 of the nut 2 is: ε 1 × 4 × P1;
the sum of the total deformation and displacement of the third teeth 23 of the nut 2 is: ε 1 × 4 × P1;
the sum of the total deformation and displacement of the fourth teeth 24 of the nut 2 is: ε 1 × 4 × P1.
In other alternative embodiments, the bolt 1 is made of plastic and the nut 2 is made of metal, e 1P 1 can be omitted, and Δ ═ e 2P 2.
The embodiment further provides a method for designing the threaded connection structure, which is used for designing the threaded connection structure, and the method for designing the threaded connection structure comprises the following steps:
s1, determining the materials of the nut 2 and the bolt 1;
s3, determining one of the lead P1 of the nut 2 and the lead P2 of the bolt 1;
s2, and calculates Δ and the other of the lead P1 of the nut 2 and the lead P2 of the bolt 1 from Δ | P1-P2| ═ epsilon 1P 1+ epsilon 2P 2.
That is, Δ is determined based on one of the lead P1 of the nut 2 and the lead P2 of the bolt 1 and the materials of the nut 2 and the bolt 1. The materials of the nut 2 and the bolt 1 are preliminarily determined according to the conventional design method of the nut 2 and the bolt 1, which is the prior art, and thus, the detailed description thereof is omitted.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A threaded connection, comprising:
a first connecting piece, which is provided with an internal thread, wherein the lead of the internal thread is a first lead P1;
a second connecting piece, which is provided with an external thread screwed with the internal thread, wherein the lead of the external thread is a second lead P2, and | P1-P2| ═ Δ ≠ 0; the length of the threaded connection between the internal thread and the external thread is H; if the P1 is more than P2, the thickness of the teeth of the internal thread is P1/2, and the distance L1 between two adjacent spiral surfaces in two adjacent teeth of the external thread is more than or equal to P2/2+ delta H/P1; if the P1 is less than the P2, the thickness of the teeth of the external thread is P2/2, and the distance L2 between two adjacent spiral surfaces in two adjacent teeth of the internal thread is more than or equal to P1/2+ delta H/P2.
2. The threaded connection according to claim 1, characterized in that P1 > P2, L1 ═ P2/2 +. Δ H/P1, in the unloaded condition of the first and second connection pieces, the clearance hN of two adjacent teeth of the female and male threads is (N-1). Δ, where N ═ 1, 2 … …, the outermost pair of threaded teeth of the female and male threads is Y1, the adjacent pair of threaded teeth of the Y1 is Y2, and so on, the other outermost pair of threaded teeth of the female and male threads is YN, the clearance of Y1 is H1, the clearance of Y2 is H2, and so on, the clearance of YN is hN.
3. The threaded connection according to claim 1, characterized in that P1 < P2, L2 is P1/2+ Δ H/P2, and in the unloaded condition of the first and second connection pieces, the clearance hN of two adjacent teeth of the female and male threads is (N-1) Δ, where N is 1, 2 … …, wherein the outermost pair of threaded teeth of the female and male threads is Y1, the adjacent pair of threaded teeth of the Y1 is Y2, and so on, the outermost pair of threaded teeth of the female and male threads is YN, the clearance of Y1 is H1, the clearance of Y2 is H2, and so on, the clearance of YN is hN.
4. A threaded connection according to any one of claims 1 to 3, characterized in that Δ ═ ε 1P 1+ ε 2P 2, the said ε 1 being the elongation at break of said first connection element and the said ε 2 being the elongation at break of said second connection element.
5. The threaded connection of claim 4, wherein said first connection is made of plastic and said second connection is made of metal, and wherein said Δ ═ ε 1 × P1.
6. The threaded connection of claim 4, wherein said second connection is made of plastic, said first connection is made of metal, and said Δ ═ ε 2 × P2.
7. A threaded connection according to claim 1, characterized in that the first connection is a nut (2) and the second connection is a bolt (1).
8. A threaded connection according to claim 1, characterized in that said first connection is a nut (2) and said second connection is a screw.
9. A threaded connection according to claim 1, characterized in that said first connection is a nut (2) and said second connection is a screw.
10. A method of designing a threaded connection, for designing a threaded connection according to any one of claims 1 to 9, the method comprising:
s1, determining the materials of the first connecting piece and the second connecting piece;
s3, determining one of the lead P1 of the first connector and the lead P2 of the second connector;
s2, calculating the Δ and the other of the lead P1 of the first connection and the lead P2 of the second connection from Δ | P1-P2| ═ epsilon 1P 1+ epsilon 2P 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110619077.7A CN113339379B (en) | 2021-06-03 | 2021-06-03 | Threaded connection structure and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110619077.7A CN113339379B (en) | 2021-06-03 | 2021-06-03 | Threaded connection structure and design method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113339379A true CN113339379A (en) | 2021-09-03 |
| CN113339379B CN113339379B (en) | 2023-04-07 |
Family
ID=77473560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110619077.7A Active CN113339379B (en) | 2021-06-03 | 2021-06-03 | Threaded connection structure and design method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113339379B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040100098A1 (en) * | 2002-11-21 | 2004-05-27 | Church Kris L. | Hang-free thread design |
| CN101627248A (en) * | 2006-01-26 | 2010-01-13 | B·W·拉莫斯 | Threaded pipe connects |
| CN103328834A (en) * | 2010-11-08 | 2013-09-25 | 拜尔·米歇尔斯有限责任两合公司 | Thread-producing nut, blank for manufacturing the nut and screwed connection composed of nut and bolt |
| CN104033462A (en) * | 2014-06-10 | 2014-09-10 | 福建海源自动化机械股份有限公司 | Prestressed threaded pull rod device as well as production method and application thereof |
| CN104842541A (en) * | 2015-04-29 | 2015-08-19 | 浙江华彩化工有限公司 | Extruding system of extruding machine |
| CN205626001U (en) * | 2016-04-08 | 2016-10-12 | 北京瑞朗泰科医疗器械有限公司 | Medical anchor |
| CN208578954U (en) * | 2018-06-14 | 2019-03-05 | 上海亿泊材料应用技术有限公司 | A kind of inserts and injection made gear |
| CN111927324A (en) * | 2020-09-16 | 2020-11-13 | 威海市海泰起重机械有限公司 | Squeezing and expanding drilling tool, squeezing and expanding pile machine and squeezing and expanding pile forming construction method |
-
2021
- 2021-06-03 CN CN202110619077.7A patent/CN113339379B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040100098A1 (en) * | 2002-11-21 | 2004-05-27 | Church Kris L. | Hang-free thread design |
| CN101627248A (en) * | 2006-01-26 | 2010-01-13 | B·W·拉莫斯 | Threaded pipe connects |
| CN103328834A (en) * | 2010-11-08 | 2013-09-25 | 拜尔·米歇尔斯有限责任两合公司 | Thread-producing nut, blank for manufacturing the nut and screwed connection composed of nut and bolt |
| CN104033462A (en) * | 2014-06-10 | 2014-09-10 | 福建海源自动化机械股份有限公司 | Prestressed threaded pull rod device as well as production method and application thereof |
| CN104842541A (en) * | 2015-04-29 | 2015-08-19 | 浙江华彩化工有限公司 | Extruding system of extruding machine |
| CN205626001U (en) * | 2016-04-08 | 2016-10-12 | 北京瑞朗泰科医疗器械有限公司 | Medical anchor |
| CN208578954U (en) * | 2018-06-14 | 2019-03-05 | 上海亿泊材料应用技术有限公司 | A kind of inserts and injection made gear |
| CN111927324A (en) * | 2020-09-16 | 2020-11-13 | 威海市海泰起重机械有限公司 | Squeezing and expanding drilling tool, squeezing and expanding pile machine and squeezing and expanding pile forming construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113339379B (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3707107A (en) | Screw connection for high loading | |
| CN105452686A (en) | Double-bolt loose proof method | |
| CN1120941C (en) | Self tapping screw | |
| CN104114300B (en) | Application in corrosive environment of corrosion-resistant bolt, this bolt and for the method manufacturing this bolt | |
| CN1130505C (en) | Thread and screwed assembly used as high temperatures | |
| CN113779748B (en) | Engine bolt tightening process calculation method and device | |
| CN113339379B (en) | Threaded connection structure and design method thereof | |
| EP2113683A2 (en) | Apparatus and method for improving radial stresses in a gear transmission mounting | |
| CN113728170B (en) | Connecting element with threaded connection | |
| CN106438657A (en) | Thread pitch interference fit thread, threaded connector and corrected thread machining tool | |
| CN201184354Y (en) | Heterodont anti-loose and anti-drop nut | |
| CN202510524U (en) | Novel locking bolt | |
| CN213575098U (en) | Anti-loosening self-tightening device | |
| CN113339389B (en) | Self-locking threaded connection structure and design method thereof | |
| CN201326630Y (en) | Unloosening bolt | |
| WO1997029287A1 (en) | Screw-on pressure medium-actuated working cylinder with closure components for coupling the cylinder tube | |
| CN106402308A (en) | Dual-nut pre-tightened ball screw pair | |
| CA2630316C (en) | Threaded connection | |
| CN2533964Y (en) | Hydraulic prestressed high strength combined roll | |
| CN111058779B (en) | High-torsion-resistance high-pressure-resistance sealing drill rod joint | |
| CN201021692Y (en) | Bolt cover | |
| CN102444659A (en) | Unloading-type anti-vibration nut capable of automatically adjusting position | |
| CN220378860U (en) | Transmission structure with anti-backlash and safety device | |
| CN117366077A (en) | Non-equidistant threaded connection pair | |
| CN2439563Y (en) | Loosen-proof and external screw jointing element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |